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202-218
STATE OF ALASKA4. "`� ' •= AL .A OIL AND GAS CONSERVATION COMM._ ► '_.JN I E I "°' • REPORT OF SUNDRY WELL OPERATIONS yPN 1 ' '014 1.Operations Abandon U Repair Welln [J Plug Perforations o Perforate Li Other U A O C,/"'• Performed: Alter CasingPull Tubi Stimulate-Frac Waiver Time Extension �,e�►"�j L jt Change Approved Program ❑ Operat.Shutdown❑ Stimulate-Other ❑ Re-enter Suspended Well❑ 2.Operator 4.Well Class Before Work: 5.Permit to Drill Number: Name: BP Exploration(Alaska),Inc Development Exploratory ❑ •• 202-218-0 3.Address: P.O.Box 196612 Stratigraphic❑ Service ❑ 6.API Number: Anchorage,AK 99519-6612 50-029-23126-00-00 7.Property Designation(Lease Number): 8.Well Name and Number: , ADL0312798 NSTR NS21 9.Logs(List logs and submit electronic and printed data per 20AAC25.071): 10.Field/Pool(s): NORTHSTAR,NORTHSTAR OIL 11.Present Well Condition Summary: Total Depth measured ' 22261 feet Plugs measured None feet true vertical 11171.43 feet Junk measured 22213 feet Effective Depth measured . 22257 feet Packer measured See Attachment feet true vertical 11167.57 feet true vertical See Attachment feet Casing Length Size MD ND Burst Collapse Structural None None None None None None Conductor None None None None None None Surface 4562 13-3/8"68#L-80 44-4606 44-3207.45 5020 2260 Intermediate None None None None None None Production 9217 9-5/8"47#L-80 43-9260 43-4879.28 6870 4760 Liner See Attachment See Attachment See Attachment See Attachment See Attachment See Attachment Perforation depth Measured depth 22140-22144 feet 22144-22164 feet 22164-22184 feet 22184-22190 feet 22190-22200 feet 22200-22210 feet 22210-22211.4 feet 22211.4-22225 feet 22225-22261 feet 22261-22264 feet True Vertical depth 11054.56-11058.4<feet 11058.42-11077.7;feet 11077.72-11097.04 feet 11097.04-11102.8 feet 11102.83-11112.5 feet 11112.5-11122.16 feet 11122.16-11123.5'feet 11123.51-11136.65 feet 11136.65-11171.4 feet 11171.43-11174.3:feet Tubing(size,grade,measured and true vertical depth) 4-1/2"12.6#13Cr80 41-21766 41 -10692.95 Packers and SSSV(type,measured and true vertical depth) See Attachment See Attachment See Attachment Packer 985.26 988 985.26 SSSV %/MED JUN 1 9 21114 12.Stimulation or cement squeeze summary: Intervals treated(measured): RBDMS MAY 1 5 2014 Treatment descriptions including volumes used and final pressure: 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing Pressure Prior to well operation: 599 42181 2684 0 809 Subsequent to operation: 588 43190 2693 0 807 14.Attachments: 15.Well Class after work: Copies of Logs and Surveys Run Exploratory❑ Development❑✓ ' Service❑ Stratigraphic ❑ Daily Report of Well Operations X 16.Well Status after work: Oil Q ' Gas U WDSPLU GSTOR ❑ WINJ ❑ WAG ❑ GINJ ❑ SUSP ❑ SPLUGEJ 17.I hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O.Exempt: N/A Contact Analisa Steger Email Analisa.Ste•er• BP.Com Printed Name Analisa Steger n ., Title PDC Data Manager Signature ElQy4 -_. Phone 564-5439 Date 4/14/2014 //4F 5/2 '//4- Form 10-404 Revised 10/2012 Submit Original Only • Daily Report of Well Operations ADL0312798 ACTIVITYDATE SUMMARY 3/2/2014 - I : - r me. ***WELL S/I ON ARRIVAL***(perforating) DRIFT W/4-1/2"XN-LOCATOR & SAMPLE BAILER, TAG XN-NIP @ 21,700' SLM (+84' = 21,784' ELM), TAG TD @ 22,130' SLM (+84' = 22,214' ELMD) 3/4/2014 ***CONT ON 3/5/14 WSR*** ***CONT FROM 3/4/14 WSR***(perforating) RAN SLB SBHPS AS PER PROGRAM (GOOD DATA) DRIFTED W/ 10' x 2-7/8" DMY GUN, TAGGED BTM @ 22,119' SLM (+84' =22,203' ELM) (TARGET DEPTH= 21,190' -22,264') 3/5/2014 ***WELL S/I ON DEPARTURE, WELL TENDER NOTIFIED*** Load 300 bbls 125*f seawater w/ 1 drum Safe-Lube and 5 gals De-Foam-X into UR 3/16/2014 ***Job continued to 3-17-14 WSR*** ***Job continued from 3-16-14 WSR***T/I/O= 38191/60/0 Assist E-line (perfs) Spear into TBG w/5 bbls followed by 300 bbls Seawater mixed w/ 1 drum Safelube and 5 gals Defoamer. Freeze Protect TBG with 2 Neat and 40 Diesel 3/17/2014 FWHP=672/650/0 E-line on well at departure ***JOB CONTINUED FROM 17-MAR-14*** RUN 2: RIH W/HEAD/ERS/2-1/8"WB/2.8" INLINE ROLLERS/UPCT/FH/14' OF 2-7/8" PJO 2906, HMX/3.5" STEM ROLLERS/BN; OAL =40', OAW= 520 LBS, MAX OD = 3.5", FN = 1.38". TAG FILL @ 22214' PERFORATE INTERVAL: 22197.4' -22211.4' CCL TO TS = 9.3' CCL STOP DEPTH = 22188.1' RUN3: RIH WITH HEAD/ERS/2-1/8"WB/2.8" INLINE ROLLERS/2/-1/8" WB/3.2" INLINE ROLLERS/UPCT/FH/8' OF 2-7/8" PJO 2906, HMX/3.5" STEM ROLLERS/BN; OAL = 38', OAW= 520 LBS, MAX OD = 3.5", FN = 1.38". PERFORATE INTERVAL: 22190'-22198'. CCL TO TS = 5.3' CCL STOP DEPTH = 22184.7 GUN DATA: PEN = 36.0", EH = 0.34", MAX SWELL= 3.32" TIE-IN/REF LOG: PDS JEWELRY LOG DATED 02-JUL-2005 FINIAL T/I/O = 2700/700/0 ***JOB COMPLETE -TURNED OVER TO WELL TENDER - POP'D WELL UPON 3/18/2014 DEPARTURE*** FLUIDS PUMPED BBLS 42 DIESEL 9 METH 300 SEAWATER W/ 1 DRUM SAFELUBE AND 5 GALS DEFOAMER 351 TOTAL 0 0,00000 ITT CD CD -47, r O N O V • M �O N M • N c0 O m I,- 00 CO CC) C70 0 i-0 LO O) O O co E N (NCO CO O r- N N CA N 03 • X25 Q I� rn in C) N Covvv M N - F- Q0 p 0 O co J J co •N * cNico (6 CO V NN - � � M 7 "1. C V a=+ ..- CI rn J J Z O w U 115WCCOu_ Z Z'Z � �'E J J 11 (/) Packers and SSV's Attachment ADL0312798 SW Name Type MD TVD Depscription NS21 SSSV 988 929.06 4-1/2"TRM-4E SSV NS21 PACKER 19949 9047.17 7" Liner Top Packer NS21 PACKER 21721 10593.33 7" 13Cr80 Packer NS21 PACKER 21765 10635.78 4-1/2" Liner Top Packer I HEE= r ABB-VGI 5-1/8"5K! SI NOTES:WELL REQUIRES A SSSV. WELLFEAD= ABB-VGI 13-5/8"MULT1E30%AL NS21 CHROME TBG&LNR— ACHUATOR= BAKER unAL KB,13.1 56.7 BF.E3_EV= 40.1'(CB 15.9') 988' H4-1/2"TRM-4E SSSV w/4-l(2 X PROF.ID=3.812" KOP= 10C/ 41. Mix Angle= 71°@ 4233' Datum PAD= 21624' Datum TV D= 10500'SS 13-3/8"CSG,68#,L-80 BTC,U=12.415' —{ 4606' —A GAS LFT MANDRELS ST M) TVD DEV TYPE VLV LATCH FORT DATE 2 8138 4495 69 SMDR DMY BK 0 04/25/04 Minimum ID = 3.726" @ 21766' 1 13718 6482 69 SMOR DMY BK 0 04/25/04 4-1/2" HES XN NIPPLE TOP OF 7"LNR 19949' 19949' H9-5/8-X 7"BKR ZXP LHR TOP PKR,U=7" [9-5/8"CSG,47#,L-80 BTM-C,U 8.681' —I 20206' 21674' —4-1/2"ABER ME TRANSDUCER =3.958" 21703' —ELM)LOGGED 06/01/04 21699' —14-1/7 HES X NP, =3.813' 21721' HT X 4-1/2'BKR S-3 1-WD PKR,U=3.875' • 21744' —14-1/2"I- X NP,ID=3,813' 21755' —4-1/2"FES XN IV,ID=3.725" 21784' Halo LOGGED 06/01t04 TOP OF 4-112"LM R —I 21766' 21766' r X 5'BKR ZXP LW,ID=6.20' 4-1/2"TBG, 12,6#,13CR-80 VAM-ACE, —I 21769' ----f_ 21769' —14-1/2"liES in&EG,U=365" 0152 bpf,U=3.958" 1-\ 21797' I—7"X 5'BKR FLEX LOCK HGR, =6.28- 7"LW,26#,L-80 HY CRL 521, — 21945' .0383 bpi, =6.276" 2179T15TC 4-1/2"XO,D=3.958" PERFORATION SUNIAARY REF LOG: FOC LOG ON 06/01/04 ANGLE AT TOP PERF: 15°@ 22140' Note:Refer to Productidn D(3 for historical perf data SIZE SFF INTERVAL(M)) Opn/Sqz SHOT SQZ 2-7/8" 6 22140-22190 0 05/26/13 2-7/8" 6 22140-72700 0 01/31/10 2-7/8" 6 22144-22164 0 07/31/05 2-7/8" 6 22164-22184 0 01/15/05 2-7/8" 6 22184-22264 0 06/14/04 22213' H(9..k10)RSI-t ARP SUPS&alauffs(11/22/09) 2-7/8- 6 22190-77710 0 11/01/10 2-7(8' 6 22190-72711 0 03/18/14.)::: ??? H RSH,CENTRALIZER ARM R3TD H 2226T 4-1/2"LW,12.6#,13CR-80 VAM-ACE, — 22259 111414444 .0152 bpf,U=3.958' (ATE FEV BY COM DATE REV BY COMENTS NORTHSTAR 11/20/02 N33E INITIAL DRILL 02/17/11 P'.€/JM) ADDED SSSV SAFETY NOTE WELL NS21 04/25/04 N33E ORIGINAL COMPLETION 05/31/13 SET/.11143 ADFERFS(05/26/13) FERMT No: 2022180 07/06/08 INRR/RIC DRAWNG CORRECTIONS 03/20/14 ATO/JM)ADPERFS(03/18/14) AR No: 50-029-23126-00 12/21/09 TFA/SV FISH(WRP EI_EkENTS) SEC 11,T13N,R13E 1249'FSL&646'FEL 02/03/10 RRD/PJC FERFS(01/31/10) 11/17/10 TA/PJC FS(11/01/10) BP Exploration(Alaska) • �w\� �% � s,, THE STATE Alaska Oil and Gas ��' of Conservation Commission __ ALASKA _ GOVERNOR SEAN PARNELL 333 West Seventh Avenue Anchorage, Alaska 99501-3572 ALAS Main: 907.279.1433 A/AH° A;1�` s 12,v14 Fax: 907.276.7542 Mark Sauve SC u Petroleum Engineer BP Exploration (Alaska), Inc. c 0o/ .... P.O. Box 196612 Anchorage, AK 99519-6612 Re: Northstar Field, Northstar Oil Pool,NSTR NS21 Sundry Number: 314-006 Dear Mr. Sauve: Enclosed is the approved application for sundry approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the AOGCC grants for good cause shown, a person affected by it may file with the AOGCC an application for reconsideration. A request for reconsideration is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. Sincerely, Daniel T. Seamount Commissioner DATED this9 day of January, 2014. Encl. R/\ ft EC is ar F D STATE OF ALASKA l' ALASKA OIL AND GAS CONSERVATION COMMISSION JAN 0 6 20 14 APPLICATION FOR SUNDRY APPROVALS ��^ 20 AAC 25.280 AO G C C 1.Type of Request: Abandon❑ Plug for Redrill❑ Perforate New Pool❑ Repair Well❑ Change Approved Program❑ Suspend❑ Plug Perforations Perforate 0 • Pull Tubing E Time Extension❑ Operations Shutdown❑ Re-enter Susp.Well❑ Stimulate❑ Alter Casing❑ Other: ❑ 2.Operator Name: 4.Current Well Class: 5.Permit to Drill Number. BP Exploration(Alaska),Inc. Development ❑✓ • Exploratory ❑ 202-218-0 • 3.Address: ❑ 6.API Number. Stratigraphic ❑ Service P.O.Box 196612,Anchorage,AK 99519-6612 50-029-23126-00-00 • 7.If perforating: 8.Well Name and Number: What Regulation or Conservation Order governs well spacing in this pool? 458A NSTR NS21 . Will planned perforations require a spacing exception? Yes ❑ No 0 • 9.Property Designation(Lease Number): 10.Field/Pool(s): ADL0312798 ' NORTHSTAR, NORTHSTAR OIL " 11. PRESENT WELL CONDITION SUMMARY Total Depth MD(ft): Total Depth TVD(ft): Effective Depth MD(ft): Effective Depth TVD(ft): Plugs(measured): Junk(measured): 22261 • 11171 . 22190 11103 None 27213 Casing Length Size MD TVD Burst Collapse Structural Conductor None None None None Surface 4562 13-3/8"68#L-80 44-4606 44-3207.45 5020 2260 Intermediate None None None None None None Production 9217 9-5/8"47#L-80 43-9260 43-4879.28 6870 4760 Liner See Attachment See Attachment See Attachment See Attachment See Attachment See Attachment Perforation Depth MD(ft): Perforation Depth TVD(ft): Tubing Size: Tubing Grade: Tubing MD(ft): See Attachment See Attachment 4-1/2"12.6#13Cr80 13Cr80 41-21766 Packers and SSSV Type: See Attachment for Packer Types Packers and SSSV MD(ft)and TVD(ft): See Attachment for Packer Depths 4-1/2"TRM-4E SSV 988',985.26' 12.Attachments: Description Summary of Proposal ❑ 13.Well Class after proposed work: Detailed Operations Program El BOP Sketch ❑ Exploratory ❑ Development Q . Service ❑ 14.Estimated Date for 15.Well Status after proposed work: Commencing Operations: 1/20/14 Oil Q . Gas ❑ WDSPL ❑ Suspended ❑ II 16.Verbal Approval: Date: WINJ ❑ GINJ ❑ WAG ❑ Abandoned ❑ Commission Representative: GSTOR ❑ SPLUG ❑ 17.I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Mark Sauve Email Mark,Sauve(aBP.com Printed Name Mark Sauve Title P.E. Signature Phone Date z.,.....Z 564-4660 1/6/2014 COMMISSION USE ONLY Conditions of approval: Notify Commission so that a representative may witness Sundry Number: 3\ji. �- 0 G Plug Integrity ❑ BOP Test ❑ Mechanical Integrity Test ❑ Location Clearance ❑ Other: REIDM8f4,MAY 1 0 2014 Spacing Exception Required? Yes ❑ No ❑ Subsequent Form Required: /a -- q,p APPROVED BY Approved by:Agg, / COMMISSIONER THE COMMISSION Date:iii// i _ a 4. Form 10-403 Revised 1/201001 �t ApprovE0p I� tIr i apc�1a ths from the date of approval. Submit in Duplicate n � #4 illy • ALASKA WELL ACTIVITY STATEMENT OF REQUIREMENTS (VI.1,DBR,LHD 11/05/13) General Information Well Name: NS21 • Well Type: Natural Flow Producer • Activity Description: Add perfs + Well Activity Classification: Conventional 4 Field/Reservoir: • Northstar Cost Code/AFE: ANSPERFS WETS Job Type: Perforations 12 Month Avg 10R,bopd: 80 AWGRS Job Scope: PERFORATING _Estimated Cost, SM: Sundry Form 10--403 Reqd? Yes Sundry Form 10-404 Required? Yes Other regulatory requirements? No Base Management Engr: Mark Sauve Contact numbers: 564-46601w), 748-2865(m), 336-6128(h) Well Intervention Engr: Contact numbers: Lead BM Engineer: Mark Sauve Contact numbers: 564-4660(w), 748-2865(m), 336-6128(h) _ Date Created: Revisions(date,who,what changed): 1/3/2014 Current Well Status Information Current Status: Operable 'Recent Well Test or Injection Rate and Pressure: 12/7/13: 631 bopd,80.2%WC,65,992 GOR,803 psi WHP. Recent H2S (date,ppm) 8/18/13 0 If inoperable or under evaluation, why? Datum depth,ft TVDss,MD 11,100 TVDSS Maximum Deviation(angle and depth) 71 4,233 _ Reservoir pressure,psig 5,081 Minimum ID(depth) 3.725•in HES XN nipple®21,755'MD Reservoir temperature,F 252 Last downhole operation(date,operation) 50'Of 2-7/8"Re-perfs shot on 5/26/13 Shut in wellhead pressure 3,722 Most recent TD tag, (date,depth,toolstring OD) Tagged 22,214'MD w 2-7/8"dummy gun on 5/25/13 Known mechanical integrity problems(specifics) Comments,well history, NS21 was drilled&completed in June 2004 and come on at an initial rate of 10,000 bopd. Due to directional data problems,the original perforations in NS21 background information,etc: extended 18'below the oil water contact. The initial perforations and first set of add-perfs both declined at severe rates(--90%/yr). The formation of CaCO3 ' scale in the new perforations that have never been inhibited was strongly suspected. NS21 has endured a series of add-perfs and acid treatment culminating in a bullhead mud acid stimulation in 2010. A recent analysis of historic Northstar stimulation benefits has concluded that re-perfs close to the original water-oil contact have consistently provided good IOR benefits. This program request is partially a result of that analysis. Well Intervention Details Suspected Well Problem: Low well PI Specific Intervention or Well Objectives 1 Re-pert a section of oil column that does not appear to be significantly contributing to flow. 2 3 Key risks,critical issues: Mitigation plan: 1 2 3 Summary Step# Service Line Activity 1 S Drift to TO with 2-7/8"dummy guns 2 E Add perfs,see attached excel perf sheet 3 Detailed work scope(If no recommended practice or standard procedure exists for the intervention type, a well specific procedure is required in addition to the SOR): 1 2 3 Performance Expectations(may be NA if no change anticipated due to the intervention) Expected Production Rates: BOPD 730 MMSCFD 65 BWPD 2550 FTP(psi): 800 Choke setting: 165 Post job POP instructions: POP well with gas lift as soon as possible post job. Attachments- include in separate excel worksheets Required attachments: Current wellbore schematic As needed depending on type of work: Perforating form,logging form,well test chart, annotated mini log, annotated log section, tubing/casing tallies,wellhead info,etc Approvals Base Mgmt Approval: Date: Wells Approval: Date: 110+= A111 Val!.1e11'!JKSI SAFETY NOTTS:WELL REQUIRES A SSS. 1 lACLLVEA0-, A061-,10113-6/0-.IL10`'&5PCS1 NS21 •••4-1/2-01010141 T00 a ACTUATOR- BA YCEg - esnAL KR,6LE 56 2' 1+ 11 Fig. 41 1'(4"1,1 Vw11)., __-__ I 9617 H4-vr Tras.Lesssv.14-117 X FI ,ID-3 A 1 KOP, tocr I MIN Angle. 7104233 Datzn MI= 21624' DA5rnIVC P 10500'SS (is-u-..Zici.WC L-ØU 15 II:,Li-11.415- 1-- 46011. 1--A & GAS I FT I4A WW1 S St P4) Tvn ow Tv w vi v !i AT011 POW rWir 2 Lg Minimum ID es 3.726' 8 217W 1 11344 ;;V111 13410951 6969 C SISIC61 IrY 1 MF1K 1 33 ' '°6704:, --.4" ;4-1/2'HES XN NIPPLE ,o•-•(..w r L.'« H 101140. 1 1 1994V , 9-5..o., •o.cn ncr,urt ror nal,ID- I-r19-5/cr co.c.,411,L-00 U114-C.V C.901 .- 20206' 21674' -14-irr FIRM OPTIC1RAAEIDUCIFR 10-3 Fr.1 : 21703' H tiJAL)LOC'31-1)06/131,4.1. I . 1 216W H4 1fTICS X NP,6:2-3413' I FNK 1 21721' FIT X 4 117131CR S 3 IfY D FICR.ID-i u/ I I 1 21744' H4 trr omx NI'',n^1813' 21755' 1--14-1/T liatt XtIrir.t.)--.314i" I I li [ Z1( 4 1-1,ku4.)Lcxxzzo prrovo4 I 4-117 L.1.411--: 21 765 ! 21765' I 1r xs•3KR 1 It)zxrLTP.0-6.2T I 4-1/7' F.C.17 Pa 11.C14.111 YAM-IMF, - 21759' , 217617 _1-44 1/2'11E5 IIL(G,0-155' I .0152 bp!.1)-•3.950' ......,........ gi Tar 7.X 5'OM n_o(Lococn.c-03.20* I ;r_NR.Z. .L-61)1Y LAIL 52', -1 21945" i 1.musi bpi,LI-ttIo" \\JIII 2176T I ,5"X 1-1+2'110,0 3.650. FORTEN SLAIMARY 111. KT_oc: PCC LOG CIP4361010/4 AMiLt AI 1U1.13.1-* 15'1022Z141.1 Mour Rear to Produnfion fil for liskrical porf data SVE Slrf-I 0111b4VAL161.11-UrioPjqz SHIA _ SilL 2-1'18' 6 22140-22190 0 052613 2 743* 5 ' 22140-22200 0 01,31(10 2-'4e' I, ' 22144 22104 0 07/3105 2-7nr 6 , 77164-77184 0 01/15435 2 7/0- 6 ' M1.31 22261 0 011/1+131 411ibi. 22213' 1-1(ELPACR FISH ViFf-'7-I f-,, .,,I r.•,ers 0 1,7',• ; 2715' 8 ' 22192•22210 0 11/0110 lir- . I ??? - UI.FNCENTR5u204 APIA ,friEr—rD H 22257' '17 IVY. ',4-1/2-LW,12.0a,11C1L-1101/A11-ACE. ..- 222S17 4 1401 44 4 4 I 4 015.2 Cpt U.---3 Ilt4r DATE REV BY i comvurrs DATE wEv BY ' 02111ACI4TS PERT'- AR -.--, 11/21102 KM INITIAL CHILL 02/11111It VAL)IADULD S.S...N SAM!Y 14211'z WALL: 4521 04J2904 5133E ,°MODAL COMPLETION obr)tris UJIM LACKFTS(0526)13) 1 PIRIST P10 2o22150 ()muse ',Ammo cwat.'MG cormcnons I API to. 50 029 23126 00 12/21)09 'TAM. ' 1 f4S11 CARP R 4,4441S4 I SFC 11 TON,Rt3F,1249'MI &54E'Fri 0110910 RRDRIC,1470-5:01:31)10) I 11/17710 TARJC,Ft:TVS:11.01)10) BP Bplorriogi 4 Mask al I PENDING PERFORATING PROCEDURE Well: NS21 API#: 50-029-23126-00 Date: 1/3/2014 Prod Engr Mark Sauve Office Ph: 907-564-4660 H2S Level: Home Ph: 907-336-6128 0 ppm on 8/18/13 Cell/Pager: 907-748-2865 ......................... CC or AFE: ANSPERFS WBL Entries ..................IOR................_.............._Type Work Description................................................................................................................................................................................................ S :Drift to TD with 2-7/8"dummy guns 100 I Shoot 74'of re-perfs as per proceedure • Well Objectives and Perforating Notes: Primary objective is to boost the well PI and IOR. However,the last recorded TD indicates fill over some 60%of requested perforating interval. A liner cleanout will be attempted beforehand / but if unsuccessful please perforate as much of the requested interval as is possible with the existing TD. 'Attachment: Tie-in log with proposed parts annotated Reference Log Tie In Log Add 0 feet Log: GR/CCL Lop GR/CCL Log to the tie-in log to be on Date: 7/2/2005 7/2/2005 depth with the reference log. Company: PDSPDS ........................................... ............................................. Depths(from-to) Depths(from-to) Feet SPF Orient. Phasing Zone Ad/Re/lperf 22.190' 22,264' 22,190' ._. ....._22,264'...... .........74......... s............. rand............. 60 de9.............._ Requested Gun Size: 2-7/8" Charge: PowerJet omega 2906HMX Is Drawdown Necessary/Desired/Unnecessary During Perforating Underbalance shootinp required uired Preferred Amount of Drawdown/Suggestions to Achieve Drawdown --- ...... Last Drift: 22,214 ft MD on 5/25/2013 Est Res.Pres.(r1 11,100 MD is 5100 psi Perforation Summary Summary Dist Well: N521 Town: Date: API#: 50-029-23126-00 Prod Engr: Anch Prod Engr ........................................... ............................ P.D.Center PBTD General Comments: Depths Balance Referenced to BHCS Gun Dia. Orient SPF Phasing Zone Adperf/Reperf 0/B/U 0/B/U 0/B/U 0/B/U 0/B/U 0/B/U 0/B/U - 0/B/U - 0/B/U - I I • Minilog for Well Techl®g Pr,io t NORTH STAR NS2I :ann.-n LAURA J.LARSON 'l,II, 1 400 Dere 6/25/2012 Producer Well: 14521 OWL 500262312600 Elevation:56.2 !.:646063.55 SPUD date:2002-11-1600:00:00 Country:USA Short name:14621 Elevation datum:KB 1.6042152.25 Conplet'tun date:2004-06-13 00:00:00 Field:NORTHSTAR Long name:NORTNSTAR NO 21 Total depth:22261 LOngrtuda:-146.693311 Status: State:Alaska Coordinate system:14A027 AFT Lstew.-:70.491296 Operator:BPXA Company:BPXA ti �1 TVOSS MD weuhoa Po%Itr M bS`° P€ (1 4 0) (Cl40 PE Notes Ln _--,4740---- OEq Nt - oma.,r-�.n :.r,,,,, l,aoo l:aoo _-- .-_ IVDS""^" SWT PPO 2 O R - Ns RFS DEP sa IVOS oe o. - ',Yk,6T,.%a` ..��,_.wr.c,,...��euawr�,, ,,n�,rl9enu1r O/W/G -10800 • —21950 [ . 'Il -10850 l \ ' /1 It • r 22000 __ " ir .. -10900, . 1. 1... c ' l , • . a. . ..... . 1- k. I. . ..22050- - _ . ... . -10950 C. --• —22100- f -11000-, p pF . '('-'9.-. J-22150 PepF a '� 84/13/89 . PERF ..v 1 • PERF el,oso� 16/87/11 PEpF P., • '1.22200 PERF EFL' S 3/31/10 _ sa Pull IBP i -moo— PERF EFF - --22250- er.r ...._ . . 10*.°Will s DEPTH DETERMINATION ce _ 46. pro ..at• - ao tt Press/GR I Cs..C,I /Temp 02-July-05 i.,,,c,itot Dio.cmus,wc 5,...y.t... , — ' . — c Company BP EXPLORATION (ALASKA). INC. ....., to ' Well NS - 21 linNINVNUitkiti ._ -Y — coy 03 1 .7: 2 t1 ; 7 2 1 7 • 1 ,C1* Field NORTH STAR _ a co t/n7y NORTH SLOPE state ALASKA o ,.... C.1. o 03 o SUrt ,i..•?Catir.n C ANA :,!Witt:IA 1,24,9 41' FSL & 646 21'FEL_ Ten-p • = -= tr) Ci_ CO a 0 03 Se(....: 11 TOW: 13N RGE: 13E co = z = < ..- Elewat‘-..r -,...4inonent.:...i-3.nn M S._ -!lev,O._' O.3 KA I nt!•:".• 2 _og klEzeu--?,1 rrom =1.,6 :::r ii S..) erj A.P14.-vAio. 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I Conventional 1 Production I Conventional 1 Complexity Criteria Regional DoA Criteria ❑ Subsea(Wet Tree-Semi Submersible, Intervention Vessel) or Offshore Under-balanced ❑ Well rate -15 mboed for Operations(Snubbing) 90 mmscfd`) or ❑ Multiple challenges, associated with high uncertainty (low predictability) and low Incremental added / manageability relating to a complex combination of well integrity, reservoir / wellbore restored production 5 conditions,production chemistry I flow assurance challenges. mboed(30 mmscfd')." • Technology/Technique new to Industry, ❑ Activity costs as per ❑ Well Activity performed on a Tier 1 or Tier 2 well, defined in GWO Wells Classification Regional VP Resource (UP 4.1-003) Delegation of Authority (DoAt Conventional 2 Complexity Criteria Conventional 2 Production/ Regional DaA Criteria ❑ Single or multiple element integrity test failures with identified moderate potential to ❑ Well rate mboed and impact or be impacted by the Well Activity; e.g. acid treatmenttflowback in a well with 15 mboed (or 18 and 90 corroded tubing. mmscfd') or Incremental ❑ Highly dynamic or poorly understood reservoir or wellbore conditions or complex added /restored production production chemistry challenges which may involve additional (beyond local norm) %1 mboed and r5 mboed measures to effectively manage the impact on the planned Well Activity. (6 and 30 mmscfd').'` ❑ Challenging wellbore trajectory which may involve additional (beyond local norm) ❑ Activity costs as per measures to effectively manage the impact on the planned well intervention. Regional Base ❑ Offshore Platform Rig (Dry Tree), Offshore Jack-up Rig (Dry Tree), Offshore Hydraulic Management Manager Workover Unit(Over-balanced operationsi, Land Drilling Rig Delegation of Authority ❑ Technology (DoAI /Technique new to BP. Conventional 3 Complexity Criteria Conventional 3 Production I Regional DoA Crites ❑ Single element well integrity failure is known to exist or uncertain integrity status with ❑ Well rate 1 a boed and t potential to impact or be impacted by the planned activity e.g_production log on well with 3 mboed for 6 and 18 no Well Activity history but report of failed tree valve. mrased') or Incremental ❑ Dynamic but well understood reservoir or wellbore conditions with well understood added/restored production production chemistry issues (e.g. hydrates, scale, wax, asphaltenes). Addressed by 0.25a hoed and established local work measures (and proven track record) to effectively manage the mboed (1.5 and 6 impact on the planned Well Activities_ mmscfd')" ❑ Well trajectory access issues covered by established local work measures (and proven ❑ Activity costs as per track record)that effectively manage the impact on the planned Well Activities. Regional Base CILand operations with a Hydraulic Workover Unit(Over-balanced operations) Management Tim Lead ❑ wellbore fluids > 10 Delegation of Author r; H2S concentration in reservoirt ppm, partial pressure H25 > 0.05psia rDc.Al or iron sulfide scale present(unless SoP exists). ❑ Technology/Technique new to Region/Team. • Hazardous Materials in use during Well Activities or generation of hazardous materials during Well Activities, including corrosive (acids and caustics), toxic, cryogenic and flammable materials,explosives and radioactive sources/materials.(unless SoP exists). ❑ Simultaneous Operations (SIMOPS): Well Activity may impact or be impacted by other work in the immediate vicinity e.g. a Well Activity conducted adjacent to a new well commissioning operation. ❑ Production Facility Impacts.Either safety and operational risk impacts to or resulting frog the production facility (e.g. returned fluids, pressures, etc. are likely to cause fac r: impacts,or facility shutdown,start-up,etc.are likely to impact the well activity). Conventional 4 Production Conventional 4 Complexity Criteria Regional Do.µ,Catena ❑ Single element integrity "anomaly- is known to exist and being managed within existing ❑ Well rate 1 mboed Ion 6 acceptance criteria but not expected to directly impact or be impacted by the planned mmscfd') or Incremental Well Activity e.g. slickline gauge run on a well with annulus sustained casing pressure addedirestored production anomaly. s 025mboed/12 months ❑ Static or benign reservoir or wellbore conditions with no significant production chemistry (1.5 mmscfd'I issues which might impact the planned Well Activity. ❑ Activity costs as per ❑ Well trajectory poses no access issues that might impact the planned Well Activity. Regional PE Delegation of ❑ Non-rig(Land and Offshore), Land Service Rig/Pulling Unit(unless SoP exists). Authority iDoAl A. references to gas production refer to commercial gas only "Added/restored production refers to average over following 12 months Y Perforation Attachment ADL0312798 Well Date Perf Code MD Top MD Base TVD Top TVD Base NS21 5/26/13 APF 22140 22144 11055 11058 NS21 5/26/13 APF 22144 22164 11058 11078 NS21 5/26/13 APF 22164 22184 11078 11097 NS21 5/26/13 APF 22184 22190 11097 11103 NS21 11/1/10 RPF 22190 22200 11103 11113 NS21 11/1/10 RPF 22200 22210 11113 11122 NS21 11/1/10 BPP 22210 22225 11122 11137 NS21 3/31/10 BPP 22225 22261 11137 11171 NS21 3/31/10 BPP 22261 22264 11171 11174 AB ABANDONED MIR MECHANICAL ISOLATED REMOVED APF ADD PERF MIS MECHANICAL ISOLATED BPP BRIDGE PLUG PULLED MLK MECHANICAL LEAK BRIDGE BPS PLUG SET OH OPEN HOLE FCO FILL CLEAN OUT STC STRADDLE PACK,CLOSED FIL FILL STO STRADDLE PACK, OPEN SQF SQUEEZE FAILED SPS SAND PLUG SET SQZ SQUEEZE SL SLOTTED LINER PER PERF SPR SAND PLUG REMOVED RPF REPERF • O -0O O O O 00 N 00 OO 00 00 V J J J J M a) d 0 O O O O N O (0 (O O p 'f) N- Tr N N- C) M O� N M = N O O d' m O (fl to 00 a) m co O N 0 Q O T T- CL o M N Q T- o v co v Cu OD a) U) a)C co O 8 ca m O N N 0 MO 2 N N a) v N O. VI N H 01 10M U Q 7 2 N O O 0` 00 (Ct300 V 53 J J J M2.1 4t _ N % N (a (O CD - (N N -• CO• I • CO M ,s T IN- Nr N Z 0 0) W U U CCEL0 u Z Z Z W j • Packers and SSV's Attachment ADL0312798 Well Facility Type MD Top Description TVD Top NS21 SSSV 988 4-1/2"TRM-4E SSV 985 NS21 PACKER 19949 7" Liner Top Packer 9103 NS21 PACKER 21721 7" 13Cr80 Packer 10650 NS21 PACKER 21765 4-1/2" Liner Top Packer 10692 STATE OF ALASKA . AKA OIL AND GAS CONSERVATION COMAION REPORT OF SUNDRY WELL OPERATIONS 1. Operations Abandon L] Repair Well [J Plug Perforations U Perforate U Other U Performed: Alter Casing ❑ Pull TubingE Stimulate - Frac ❑ Waiver ❑ Time Extension❑ Change Approved Program ❑ Operat. Shutdown❑ Stimulate - Other ❑ Re -enter Suspended WeII❑ 2. Operator 4. Well Class Before Work: 5. Permit to Drill Number: Name: BP Exploration (Alaska), Inc Development 0 • Exploratory ❑ 202 -218 -0 ' 3. Address: P.O. Box 196612 Stratigraphic❑ Service ❑ 6. API Number: Anchorage, AK 99519 -6612 50- 029 - 23126 -00 -00 , 7. Property Designation (Lease Number): 8. Well Name and Number: ADL0312798 NSTR NS21 • 9. Logs (List logs and submit electronic and printed data per 20AAC25.071): 10. Field /Pool(s): To Be Submitted NORTHSTAR, NORTHSTAR OIL • 11. Present Well Condition Summary: Total Depth measured 22261 feet • Plugs measured None feet true vertical 11171.43 feet Junk measured 22213 feet Effective Depth measured 22190 feet Packer measured See Attachment feet true vertical 11102.83 feet true vertical See Attachment feet Casing Length Size MD TVD Burst Collapse Structural None None None None None None Conductor None None None None None None Surface 4562 13 -3/8" 68# L -80 44 - 4606 44 - 3207.45 5020 2260 Intermediate None None None None None None Production 9217 9 -5/8" 47# L -80 43 - 9260 43 - 4879.28 6870 4760 Liner See Attachment See Attachment See Attachment See Attachment See Attachment See Attachment Perforation depth Measured depth 22140 - 22144 feet 22144 - 22164 feet 22164 - 22184 feet 22184 - 22190 feet 22190 - 22200 feet 22200 - 22210 feet 22210 - 22225 feet 22225 - 22261 feet 22261 - 22264 feet True Vertical depth 11054.56 - 11058.4 feet 11058.42 - 11077.7: feet 11077.72 - 11097.04 feet 11097.04 - 11102.8 feet 11102.83 - 11112.5 feet 11112.5 - 11122.16 feet 11122.16 - 11136.6! feet 11136.65 - 11171.43 feet 11171.43 - 11174.3 feet Tubing (size, grade, measured and true vertical depth) 4 -1/2" 12.6# 13Cr80 41 - 21766 41 - 10692.95 Packers and SSSV (type, measured and true vertical depth) See Attachment See Attachment See Attachment Packer None None None SSSV 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: SCANNED =1 JN 2 8 2013 13. Representative Daily Average Production or Injection Data Oil -Bbl Gas -Mcf Water -Bbl Casing Pressure Tubing Pressure Prior to well operation: 661 40883 2517 0 792 Subsequent to operation: 813 46856 2535 0 814 14. Attachments: 15. Well Class after work: Copies of Logs and Surveys Run Exploratory❑ Development IO • Service ❑ Stratigraphic ❑ Daily Report of Well Operations X 16. Well Status after work: Oil Gas ❑ WDSPL[J GSTOR ❑ WINJ ❑ WAG ❑ GINJ ❑ SUSP ❑ SPLUG❑ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O. Exempt: 312 -018 Contact Nita Summerhays Email Nita.Summerha s • BP.com Printed Name Nita Summerhays , Title Petrotechnical Data Technician Signat - if. , 4 . ∎ �� � /% %�� Phone 564 -4035 Date 6/18/2013 ■- V r RBDMS JUN 26 201. / � i � Z �- r� Form 10 -404 Revised 10/2012 Submit Ori final Only • • Daily Report of Well Operations ADL0312798 ** *WELL FLOWING ON ARRIVAL * ** (pre eline adperf) RIGGED UP SLICKLINE DSL# 1 UNABLE TO GET PASSING LEAK TIGHT TEST WAITING ON THE ARRIVAL OF GREASE CREW TO SERVICE VALVES 3/18/2013 * * *CONT ON 03/19/13 WSR * ** * * *CONT FROM 03/18/13 WSR ** *(pre add -pert) UNABLE TO GET PASSING DUAL BARRIER TEST WHILE GREASE CREW WAS SERVICING MASTER VALVE W/ GREASE THE MODEL D GREASE FITTING BLEW THE ORING OUT AND RELEASED GAS INTO THE WELL HOUSE, GREASE CREW WAS ABLE TO STOP LEAK BY TIGHTENING THE FITTING CREATING A METAL TO METAL SEAL. ALL EQUIPMENT WAS SHUT DOWN AND CONTACTS MADE STILL UNABLE TO GET LEAK TIGHT TEST AFTER GREASE CREW SERVICED VLV'S TROUBLE SHOOT VALVE'S AND DETERMINE THAT SSV IS LEAKING APPLIED HEAT TO SSV AND CONT. ATTEMPTING TO GET A PASSING LEAK TIGHT TEST 3/19/2013 * * *CONT ON 03/20/13 WSR * ** 1 /I /0= 3700/800/40 Temp= SI Load & Kdi Tbg ( tree swap) Speared into Tbg w/ 3 bbls 60/40 methanol followed by 414 bbls SW. Pumped 10 bbls 60/40 methanol to 3/20/2013 freeze protect Tbg. ** *WSR continued on 03- 21 -13 * ** T /I /O = 0/800/40. Conducted PJSM. Barriers = SSSV & TWC. Verified by bleeding TBG to 0 psi. N/D 5 -1/8" x 5 -1/8" Gray tree w /actuated WV & 3 -1/8" CV. N/U 5 -1/8" x 5 -1/8" Gray tree (same configuration), torqued MV x TBG Head adapter (1278 ft Ib, L7M) & WV x S -Riser (choke) to API spec (1667 ft -lb L7). Rotated 3 -1/8" CV 180 degrees & installed intergral flange w/1502 cap, torqued to API spec (523 ft-lb, L7). Rotated WC 180 degrees & torqued to API spec (1667 ft- Ibs, L7). PT'd tree 200 -300 psi low & 6500 psi high for 5 minutes each (Passed). Bled tree to 0 psi, rigged up Cameron lubricator ( #68 -866) with CIW "H" pulling tool. PT'd lubricator 300 psi low & 3500 psi high for 5 minutes each (Passed). Tagged @ 136" w /short pulling tool, pulled 5" TWC (# NS -3) "H" thru tree, shut SV bled to 0 psi, rigged down lubricator. Final WHP = 258/800/40. Job complete. 4/20/2013 ** *WELL FLOWING ON ARRIVAL * ** (Pre Eline Reperfs) DRIFTED W/ 10 X 2 -7/8" DUMMY GUN & SAMPLE BAILER - TAGGED TD @ 22,118' SLM RAN XN LOCATOR - LOCATE XN @ 21699' SLM ( +85' = 21,784' ELM), TAG TD @ 22,124' SLM ( +85' = 22,209' ELM) (TARGET DEPTH = 22,190') 5/16/2013 ** *JOB COMPLETE, WELL TURNED OVER TO CONTROL ROOM TO POP * ** T /I /0= 900/1020/180 Temp= hot Heat Seawater into upright and mix Safe -lube, 5/24/2013 Assist E -line, RU to Kill Line & PT ( perfs ). ** *WSR continued on 05- 25 -13 * ** ** *WSR continued from 05- 24 -13 * ** Assist E -line, Load Tbg ( perfs) Speared into Tbg w/ 10 bbls neat methanol followed by 346 bbls 130* Seawater w/ Safe -Lube & 5/25/2013 30 bbls 60/40 methanol to freeze protect. ** *WSR continued on 05- 26 -13 * ** i • • Daily Report of Well Operations ADL0312798 ** *WSR continued from 05- 25 -13 * ** Heat SeaWater into upright, Assist E -line, Load Tbg ( perfs ). Speared into Tbg w/ 10 bbls neat methanol followed by 330 bbls 125* SeaWater w/ Safe -Lube & 30 bbls 60/40 methanol to freeze protect. 5/26/2013 FWHP's = xx /xx /xx SEL in control of well, OA and IA =OTG ** *WSR continued from 05- 25 -13 *** Heat SeaWater into upright, Assist E -line, Load Tbg ( perfs ). Speared into Tbg w/ 10 bbls neat methanol followed by 330 bbls 125* SeaWater w/ Safe -Lube & 30 bbls 60/40 methanol to freeze protect. 5/26/2013 ** *WSR continued on 05- 27 -13 * ** ** *WSR continued from 05- 26 -13 * ** Assist E -line ( perfs) Rig down. 5/27/2013 FWHP's= 1900/680/80 E -line in control of well upon departure. IA & OA= OTG. ** *JOB CONTINUED FROM 5/26/13 * * *(E -LINE RE -PERF) CONFIRMED ALL SHOTS FIRED, RIG DOWN WELL TURNED OVER TO OPS FOR POP FINAL T /I /O = 1900/700/70 5/27/2013 ** *JOB COMPLETE * ** Casing / Tubing Attachment ADL0312798 Casing Length Size MD TVD Burst Collapse LINER 1996 7" 26# L -80 19949 - 21945 9103.37 - 10866.5 7240 5410 LINER 494 4 -1/2" 12.6# L -80 21765 - 22259 10691.98 - 11169.5 8430 7500 PRODUCTION 9217 9 -5/8" 47# L -80 43 - 9260 43 - 4879.28 6870 4760 SURFACE 4562 13 -3/8" 68# L -80 44 - 4606 44 - 3207.45 5020 2260 TUBING 21725 4 -1/2" 12.6# 13Cr80 41 - 21766 41 - 10693 8430 7500 • • • • Packers and SSV's Attachment ADL0312798 SW Name Type MD TVD Depscription NS21 PACKER 19949 9047.17 7" Liner Top Packer NS21 PACKER 21721 10593.33 7" 13Cr80 Packer NS21 PACKER 21765 10635.78 4 -1/2" Liner Top Packer I Ilia = ABB-VGI 5-1/8" ■ WELLHEAD= ABB-VGI 13-5/8" fe4JLTIBOWL NS21 ... 4.112. N M EW TBG E a RE L Q N U1RES A SSSV. __. ACTUATOR= BAKER NUAL KB. ELE 562 H i BF. ELEV = 401. (CB 15.9') I 988' --4-1/2" TRM-4ESSSV w /4-1/2" X PROF, ID = 3.812* I KOP = 100' I Q am AN* = 71° (4 4233' Datum MD = 21624' CatimIVD = 10500 SS 113-3/8" CSG, 68#, L-80 BTC, ID = 12.415' H 4606* GAS LFT WM:REIS ST Pt() TVD DEV TYPE VLV LATCH PORT DATE 2 8138 4495 69 SMOR DMY BK 0 04/25/04 Minimum ID = 3.726" @ 21765' 1 13718 6482 69 SMOR CI& BK 0 04/25/04 4-1/2" HES XN NIPPLE 1TOP OF 7" LNR H 19949' I 1 I 19949' H9-5/8" X 7" BKR ZXP LINIzt TOP PKR, ID = ?" 1 I 19-5/8" CSG, 47#, L-80 BTM-C, D = 8.681" _1-1 20205' HA 21674' H4-1/2" FIBER OPTIC TRANSDUCER, N3 = 3.958 I 21703' H LOGGB306/01/04 I • 21699 HES X PIP, 13= 3.813" I X 21721' _ j--ir X 4-1/2' BKR S-3 HY DR(R, ID = 3.875" 1 I • 21744' H4-112 I-1M X NP, ID = 3.813" I 21755' H4-1/2" HES XN MP, D= 3.725° I 21784' Haim LOGGED 06/01/04 I I TOP OF 4-1/2' UR H 21765 ' 1,...,,..., 2176r Hrx5- BKR 1-RD ZXP LTP, ID = 6.20' I 4-1/2" IBG, 12.6#, 13CR-80 VAM-ACE, ---I 21769' I 21769' H4-1/2" HES INLEG, ID = 3.85" I .0152 bpf, D = 3.958" TN I ... --'........***. s1 21w H7" X 5" BKR FLO( LOCK HGR D = 620" I 7" L1117, 26#, L-80 HY DRIL 521, H 21945' .0383 bpf, ICI = 6.276* 21797' H5* X 4-1/2" X0, D = 3.958" I PERFORATION SUS/WRY h. REF LOG: FDC LOG ON 06/01/04 ANGLE AT TOP PERF: 15" ,q 22140' I Note: Refer to Production DB for historical pert data SIZE SPF INTERVAL (hp Opn/Sqz SHOT SOZ 2-7/8" 6 22140 - 22190 0 05/26/13 2-7/8" 6 22140 - 22200 0 01/31/10 2-7/8" 6 22144 - 22164 0 07/31/05 2-7/8" 6 22164 - 22184 0 01/15/05 2-7/8" 6 22184 - 22264 0 06/14/04 Ilk r_ 2:27:1—(13-MD) RSI-t WRPSLPS & B_BAENTS (11(22/09) I 2-7/8" 6 22190 - 22210 0 11/01/10 Ilk I ??? HFISH, CENIRAL1ZER ARM I'»--I 2225T 1 Wee, 4-1/2" LM, 12.6#, 13Cl2-80 VAM-ACE, —I 22259' .....•1 ■e•t4et .0152 bpf, ID = 3.958" DATE REV BY CONNDITS DATE REV BY COP/NEWS NDRTHSTAR 11/20/02 Pi33E INTIAL DRILL I 02/17/11 M13/JR/D ADDED SSSV SAFETY NOTE ilIN31: NS21 04/25/04 N33E ORIGINAL CONIPLETTON I 05/31/13 SET/JM) ADPBRFS (05/26/13) pERmr No: 2022180 07/06/08 WRR/PJC DRAWNIG CORREC`TTONS 1 API tb: 50-029-23126-00 12/21/09 TFA/S1/ ASH (WRP ELENUITS) , SEC 11, T13N, R13E, 1249' FSL & 646' FE_ 02/03/10 RRDIRIC ITRFS (01/31/10) , 11/17/10 TA/PJC FERFS (11/01/10) , OP &pima/Jon (AIaska) 4 ,w \ OF � ✓ � s � THE STATE Alaska Oil and Gas '' °fALASKA Conservation Commission GOVERNOR SEAN PARNELL 333 West Seventh Avenue Anchorage, Alaska 99501 -3572 ALAS' Main: 907.279.1433 Fax: 907.276.7542 Mark SCANNED 2 6 2013, 1 g. Petroleum eum Engineer v BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, AK 99519 -6612 Re: Northstar Field, Northstar Oil Pool, NS21 Sundry Number: 313 -018 Dear Mr. Sauve: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for reconsideration. A request for reconsideration is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. Sincerely, Cathy P Foerster Chair DATED this Z- of January, 2013. Encl. 7 0 • RECEIVED STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION JAIy 1 2013 /7/7//.3 �S APPLICATION FOR SUNDRY APPROVALS ��� 20 AAC 25.280 1. Type of Request: Abandon ❑ Plug for Redrili❑ Perforate New Pool ❑ Repair Well ❑ Change Approved Program ❑ Suspend ❑ Plug Perforations❑ Perforate Q • Pull Tubing ❑ Time Extensio ki► . ,N, M Operations Shutdown ❑ Re -enter Susp. Well ❑ Stimulate ❑ Alter Casing ❑ Other .' � 2. Operator Name: 4. Current Well Class: 5. Permit to Drill Number. BP Exploration (Alaska), Inc. Development is • Exploratory ❑ 202 -218-0 3. Address: Stratigraphic ❑ Service ❑ 6. API Number. P.O. Box 196612, Anchorage, AK 99519 - 6612 50 -029- 23126 -00 -00' 7. If perforating: 8. Well Name and Number. What Regulation or Conservation Order governs well spacing in this pool? 4584( NSTR NS21 Will planned perforations require a spacing exception? Yes ❑ No ® 9 1 4. 13 9. Property Designation (Lease Number): 10. Field /Pool(s): ADL0312798 " NORTHSTAR, NORTHSTAR OIL • 11. PRESENT WELL CONDITION SUMMARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): Plugs (measured): Junk (measured): 22261 • 11171 • 22190 11103 None 22213 Casing Length Size MD ND Burst Collapse Structural Conductor None None None None Surface 4562 13 -3/8" 68# L -80 44 - 4606 - 5020 2260 Intermediate None None None None None None Production 9217 9 -5/8" 47# L -80 43 - 9260 - 6870 4760 Liner See Attachment See Attachment See Attachment See Attachment See Attachment See Attachment Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): See Attachment See Attachment 4 -1/2" 12.6# 13Cr80 13Cr80 41 - 21766 Packers and SSSV Type: See Attachment for Packer Types Packers and SSSV MD (ft) and TVD (ft): See Attachment for Packer Depths No SSSV Installed No SSSV Installed 12. Attachments: Description Summary of Proposal ❑ 13. Well Class after proposed work: Detailed Operations Program s BOP Sketch ❑ Exploratory ❑ Development El , Service ❑ 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: Oil 0 • Gas ❑ WDSPL ❑ Suspended ❑ 16. Verbal Approval: Date: WINJ ❑ GINJ ❑ WAG ❑ Abandoned ❑ Commission Representative: GSTOR ❑ SPLUG ❑ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Mark Sauve Email Mark Sauve.@BP.Com Printed Name ,, Sauve Title PE Signature � Phone 564 -4660 Date 1/14/2013 „7,g7 �_ COMMISSION USE ONLY Conditions of approval: Notify Commission so that a representative may witness Sundry Number '51 g Plug Integrity ❑ BOP Test ❑ Mechanical Integrity Test ❑ Location Clearance ❑ - Other: Spacing Exception Required? Yes ❑ No ❑ Subsequent Form Required: / a — Z-/- 0 APPROVED BY Approved by: P 94(i'1'- COMMISSIONER THE COMMISSION Date: ° 2-2 (3 0 Rice+ 2 0 // 71/ ..S /�� 2 i Approved application is valid for 12 months from trig tl8te°oPa a . Su mit in Duplicate(, • • PERFORATING PROCEDURE Ver 4 0 06/04/01 1111111 Well: NS21 API #: 50- 029 - 23126 -00 Date: 1/10/13 Prod Engr Mark Sauve Office Ph: 564 -4660 H2S Level: Home Ph: 336 -6128 None Anticipated Cell: 748 -2865 CC or AFC: ANSPERFS Detail Code: Description: Drift to TD with dummy gun & re -pert 50' WBL Entries IOR Type Work Description 75 S Drift to TD with 2 -7/8" Dummy Gun 75 E Re -pert 50' per the below procedure. Well Objectives and Logging Notes: The objective of the slickline portion of this procedure is to evaluate the extent of any restriction that might exist due to scale. The proposed perforations are an attempt to increase production by re- perforating 50' of the existing perforations. Please note that the perforations will be dependent on the drift information. Please contact Mark Sauve with any questions, comments, or concerns - 564 -4660 (w); 748 -2865 (c); 336 -6128 (h). Attachment: Reference Log with annotated perforations. Reference Log Tie in Log Add 0 feet Log: GR /CCL Log GR /CCL Log to the tie -in log to be on Date: 7/2/2005 7/2/2005 depth with the reference log. Company: PDS PDS Depths (from -to) Depths (from -to) Feet SPF Orient. Phasing Zone Ad /Re /lperf 22,140' - 22,190' 22,140' - 22,190' 50' 6 60° 0 Ivishak RePerf 0 0 0 Gas Jetting Expected? No At what Depth? N/A Requested Gun Size: 2.875 Charge: 2906 PJ Desired Penetration: 27.7 Entry Hole Diam: 0.36 Is Drawdown Necessary/Desired /Unnecessary During Perforating NA Describe below how to achieve drawdown (check w/ Pad Operator to see if necessary piping is installed) (e.g. N2 Lift, Hardline Lift Gas, Gas Lift, Flow Well, Back low Through Drain or Hardline) Tie in to Jewelry @ MD Tie in using: PDS GR /CCL Jewelry log dated 7/2/05 Minimum ID: 3.725 in Min ID Type: 4.5" XN Nipple @ 21,755 'MD WLEG Depth: 21,769 ft MD Casing Size: 4.5 in 12.6# 13 -CR Liner 3 Est Res. Pres. @ 22,245 MD - 11100' SS 5,074 psi Last Tag: 22,218 ft ELMD on 11/1/2010 with 2 -7/8" dummy guns Well: NS21 Perforation Summary Date: API #: 50- 029 - 23126 -00 On -Site Prod Engr: PBTD General Comments: Depths Balance Referenced to BHCS Feet SPF Orient. Phasing Zone Aperf /Reperf O /B /U - 0 O /B /U - O O /B /U - O O /B /U - 0 o /B /u - n. 0 • Perforation Attachment ADL0312798 Well Date Perf Code MD Top MD Base TVD Top TVD Base NS21 1/31/10 APF , 22140 22144 11055 11058 NS21 1/31/10 APF . 22144 22164 11058 11078 NS21 1/31/10 APF 22164 22184 11078 11097 NS21 3/8/10 APF 22184 22190 11097 11103 NS21 11/1/10 RPF , 22190 - 22200 11103 11113 NS21 11/1/10 RPF . 22200 22210 11113 11122 NS21 11/1/10 BPP - 22210 22225 11122 11137 NS21 3/31/10 BPP 22225 22261 11137 11171 NS21 3/31/10 BPP 22261 22264 11171 11174 AB ABANDONED MIR MECHANICAL ISOLATED REMOVED APF • ADD PERF MIS MECHANICAL ISOLATED BPP BRIDGE PLUG PULLED MLK MECHANICAL LEAK BRIDGE BPS PLUG SET OH OPEN HOLE FCO FILL CLEAN OUT STC STRADDLE PACK, CLOSED FIL FILL STO STRADDLE PACK, OPEN SQF SQUEEZE FAILED SPS SAND PLUG SET SQZ SQUEEZE SL SLOTTED LINER PER PERF SPR SAND PLUG REMOVED RPF REPERF . • • Packers and SSV's Attachment ADL0312798 Well Facility Type MD Top Description TVD Top NS21 PACKER 19949 7" Liner Top Packer 9103 NS21 PACKER 21721 7" 13Cr80 Packer 10650 NS21 PACKER 21765 4 -1/2" Liner Top Packer 10692 Casing Summary ADL0312798 Casing Length Size MD Top MD Base TVD Top TVD Base Burst Collapse Grade LINER Length 7" 26# L -80 19949 21945 TVD Top TVD Base 7240 5410 L -80 LINER 4 -1/2" 12.6# L -80 21765 22259 8430 7500 L -80 PRODUCTION 9 -5/8" 47# L -80 43 9260 6870 4760 L -80 SURFACE 13 -3/8" 68# L -80 44 4606 5020 2260 L -80 TUBING 4 -1/2" 12.6# 13Cr8( 41 21766 8430 7500 13Cr80 • I I • TREE= ABB- VGI5 -1/8" se-, NOTES: WELL REQUIRES SSSV. • WELLHEAD = ABB -VGI 13 -5/8" MULTIBOWL '4 -1/2" CHROME TBG & LNR*''* ACTUATOR = BAKER N S 21 KB. ELEV = 56.19' BF. ELEV =, 40.1' (CB 15.9') KOP = ' 100' • I 988' 1-14-1/2" TRM-4E SSSV w /4-1/2" X PROF, ID = 3.812" I Max Angle = 71° @ 4233' Datum MD = 21624' Datum TVD = 10500' SS 113 -3/8" CSG, 68 #, L -80 BTC, ID = 12.415" 1-I 4606' GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 2 8138 4495 69 SMOR DMY BK 0 04/25/04 Minimum ID = 3.725" @ 21755' 1 13718 6482 69 SMOR DMY BK 0 04/25/04 4 -1/2" HES XN NIPPLE TOP OF 7" LNR H 19949' ■ 19949' 1-19-5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" I 1 1 19-5/8" CSG, 47 #, L -80 BTM-C, ID = 8.681" H 20205' I 21674' I-1 4 -1 /2" FIBER OPTIC TRANSDUCER, ID = 3.958" I 1 21703' H ELMD LOGGED 06/01/04 I 1 21699' H 4 -1/2" HES X NIP, ID = 3.813" I 21721' 1-17" X 4-1/2" BKR S -3 HY D PKR, ID = 3.875" ■ 21744' 1-14 -1 /2" HES X NIP, ID = 3.813" I 21755' -14 -1/2" HES XN NIP, ID = 3.725" I I 21784' I I ELMD LOGGED 06/01 /04 1 TOP OF 4-1/2" LNR 1-1 21765' 21765' H 7" X 5" BKR HRD ZXP LTP, ID = 6.20" I 4 -1/2" TBG, 12.6 #, 13CR -80 VAM -ACE, -I 21769' 1 1 1 21769' H 4 -1/2" HES WLEG, ID = 3.85" I .0152 bpf, ID = 3.958" 21787'_1-17" X 5" BKR FLEX LOCK HGR, ID = 6.20" I 7" LNR, 26 #, L -80 HY DRIL 521, -1 21945' 0383 bpf, ID = 6.276" 21797' 1-15" X 4-1/2" XO, ID = 3.958" I PERFORATION SUMMARY REF LOG: PDC LOG ON 06/01/04 I ANGLE AT TOP PERF: 15° @ 22140' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL (MD) Opn /Sqz DATE / 2 -7/8" 6 22140 - 22200 0 01/31/10 / 2 -7/8" 6 22144 - 22164 0 07/31/05 2 -7/8" 6 22164 - 22184 0 01/15/05 2 -7/8" 6 22184 - 22264 0 06/14/04 22213' 1-1(ELMD) FISH: WRPSLIPS & ELEMENTS (11/22/09) 1 2 -7/8" 6 22190 - 22210 0 11/01/10 1111 I illif ? ? ? -1 FISH, CENTRALIZER ARM 1 I PBTD I 22257' 4 -1/2" LNR, 12.6 #, 13CR -80 VAM-ACE, -1 22259' ►WA• � * � � � � � � � �0 .0152 bpf, ID = 3.958" DATE REV BY COMMENTS DATE REV BY COMMENTS NORTHSTAR 11/20/02 N33E INITIAL DRILL 07/06/08 WRR/PJC DRAWING CORRECTIONS WELL: NS21 04/25/04 N33E ORIGINAL COMPLETION 12/21/09 TFA /SV FISH (WRP ELEMENTS) PERMIT No: 2022180 11/01/05 RMH /PJC SET IBP @ 22101 02/03/10 RRD /PJC FERFS (01/31/10) API No: 50- 029 - 23126 -00 02/14/06 RAC/PAG WRP CORRECTION (11/01/05) 11/17/10 TA /PJC PERFS (11/01/10) SEC 11, T13N, R13E, 1249' FSL & 646' FEL 11/27/07 WRR/PJC WELLHD/ LOC CORRECTIONS 02/17/11 MB /JMD ADDED SSSV SAFETY NOTE 06/29/08 WRR/PJC DRAWING CORRECTIONS BP Exploration (Alaska) • • A3ct s - 2 PTO 2-07-Z-1 SO Regg, James B (DOA) From: Redmond, Randy [RedmonRF @BP.com] Sent: Friday, March 30, 2012 3:43 PM 1�� To: Regg, James B (DOA) Cc: Price, Bruce; AK, OPS Nstar OIM; Daniel, Ryan; AK, OPS Full Field OSS Subject: BPXA North Star SVS Testing of N21 Dear Mr. Regg, BPXA had encountered a failed SSSV leak test with North Star Island, Well NS -07, on March 17, 2012 and instituted a 14 day repair plan that was completed with a SSSV replacement on March 26 and a passed re -test on the 28th. During a similar test interval, North Star Operations discovered well NS -21 contained a leaking wing valve and were unable to initially test this well and deemed a No Test on March 19th. A replacement -in- kind wing valve has been located and the valve is scheduled to be installed April 1 2012. The valve testing will follow once well production and temperature has been stabilized. However, on March 27, 2012 it was discovered that this well had gone 214 days since the last SVS test and did not fall under the repair plan scenarios noted on well NS -07, and was subsequently shut in the same day, March 27, 2012. AOGCC shall be ' contacted for a witness test at least 48 hours prior to testing during the 1 week of April this year. BPXA is taking the action to provide additional regulatory awareness training to key personnel to mitigate any further over sights to these requirements. Please contact me directly if there are any questions or issues that need additional clarification. Sincerely, Randy Randy Redmond, PE BPXA, Full Field OSM RedmonRF@ BP.com 907 -564 -4889 Cell 907 -529 -2689 1 ID • s riouF s [1(( SEAN PARNELL, GOVERNOR ALASKA OIL AND GAS 333 W. 7th AVENUE, SUITE 100 CONSERVATION COMJ.'II55ION ANCHORAGE, ALASKA 99501 -3539 PHONE (907) 279 -1433 FAX (907) 276 -7542 Mark Sauve cc�� Wells Intervention Team Lead BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, AK 99519 -6612 Re: Northstar Field, Northstar Oil Pool, NS21 Sundry Number: 312 -009 Dear Mr. Sauve: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for reconsideration. A request for reconsideration is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. Sincerely, r Daniel T. Seamount, Jr. Chair DATED this / day of January, 2012. Encl. VIII • STATE OF ALASKA • ALAS L AND GAS CONSERVATION COMMISSI t. �4 APPLICATION FOR SUNDRY APPROVALS _grlAN 5 201? / - 9.4.? AAC 25.280 I _ w, q Y . ' '444' 1. Type of Request: Abandon ❑ Plug for Redrill ❑ Perforate New Pool ❑ Repair Well ❑ � ands ��r S111 Suspend ❑ Plug Perforations ❑ Perforate ri - Pull Tubing ❑ ' "'' .4 extension ❑ Operation Shutdown ❑ Re -enter Susp. Well ❑ Stimulate❑ Alter Casing ❑ Other: ❑ 2. Operator Name: 4. Current Well Class: 5. Permit to Drill Number: BP Exploration (Alaska), Inc. Development 0 , Exploratory ❑ 202 -2180 - 3. Address: P.O. Box 196612 Stratigraphic ❑ Service ❑ 6. API Number: Anchorage, AK 99519 -6612 50-029-23126-00-00. 7. If perforating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: - Spacing Exception Required? Yes ❑ No ❑ NS21 9. Property Designation (Lease Number): 10. Field /Pool(s): ADLO- 312798 - NORTHSTAR Field / NORTHSTAR OIL Pool 11. PRESENT WELL CONDITION SUMMARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): Plugs (measured): Junk (measured): 22261 - 11171.43 22258 - 11168.54 NONE 22213, UNKNOWN Casing Length Size MD TVD Burst Collapse Structural Conductor Surface 4562' 13 -3/8" 68# L -80 44 4606 44 3207 4930 2270 Production 20107' 9 -5/8" 47# L -80 43 9260 43 4879 6870 4760 Liner 1996' 7" 26# L -80 19949 21945 9103 10867 7240 5410 Liner 494' 4 -1/2" 12.6# L -80 21765 22259 10692 11170 8430 7500 Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): SEE ATTACHED - - 4 -1/2" 12.6# 13Cr80 41 21766 Packers and SSSV Tvoe: 4 -1/2" TRM -4E SSV Packers and SSSV MD and TVD (ft): 988 985 7" Liner Top Packer 19949 9103 7" 13Cr80 Packer 21721 10650 4 -1/2" Liner Top Packer 21765 10692 12. Attachments: Description Summary of Proposal ❑ 13. Well Class after proposed work: Detailed Operations Program ❑ BOP Sketch ❑ Exploratory ❑ Development 0 ' Service ❑ 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: 1/19/2012 Oil 0 • Gas ❑ WDSPL ❑ Suspended ❑ 16. Verbal Approval: Date: WINJ ❑ GINJ ❑ WAG ❑ Abandoned ❑ Commission Representative: GSTOR ❑ SPLUG ❑ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Mark Sauve Printed Name Mark Sa Title PE Signature lipPr7. Phone Date 564 -4660 1/5/2012 Prepared by Joe Lastufka 564 -4091 COMMISSION USE ONLY Conditions of approval: Notify Commission so that a representative may witness Sundry Number: ✓ (2 ^ °C Plug Integrity ❑ BOP Test ❑ Mechanical Integrity Test ❑ Location Clearance ❑ Other: Subsequent Form Required: ^11d ` APPROVED BY Approved by: COMMISSIONER THE COMMISSION , Date: / /6 RSDMS JAN 12 012 7,e_. /1./z___. oRIGINAL ' 0/ Form 10 -403 Revised 1/2011 - Submit in Duplicate NS21 202 -218 PERF ATTACHMENT Sw Name Operation Date Perf Operation Code Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 6/14/04 PER 22,184. 22,264. 11,097.04 11,174.33 NS21 1/15/05 APF 22,164. 22,184. 11,077.72 11,097.04 NS21 7/31/05 APF 22,144. 22,164. 11,058.42 11,077.72 NS21 11/1/05 BPS 22,225. 22,268. 11,136.65 11,178.19 NS21 11/22/09 BPP 22,225. 22,268. 11,125.06 11,126.02 NS21 1/31/10 APF 22,140. 22,200. 11,054.56 11,112.5 NS21 3/8/10 BPS 22,190. 22,264. 11,102.83 11,174.33 NS21 3/31/10 BPP 22,190. _ 22,264. 11,102.83 11,174.33 • NS21 11/1/10 RPF 22,190. 22,210. 11,102.83 11,122.16 AB ABANDONED PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG PULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • M � • PERFORATING PROCEDURE Ver 4 0 06/04/01 ADW srwsn MUMS awfus Well: NS21 API #: 50- 029 - 23126 -00 Date: 1/4/12 Prod Engr Mark Sauve Office Ph: 564 -4660 H2S Level: Home Ph: 336 -6128 None Anticipated Cell: 748 -2865 CC or AFC: ANSFLDWL21 Detail Code: Description: Drift to TD with dummy gun & re -pert 50' WBL Entries IOR Type Work Description 75 S Drift to TD with 2 -7/8" Dummy Gun • 75 E Re -pert 50' per the below procedure. Well Obiectives and Loqqinq Notes: The objective of the slickline portion of this procedure is to evaluate the extent of any restriction that might exist due to scale. The proposed perforations are an attempt to increase production by re- perforating 50' of the existing perforations. / Please note that the perforations will be dependent on the drift information. Y Please contact Mark Sauve with any questions, comments, or concerns - 564 -4660 (w); 748 -2865 (c); 336 -6128 (h). Attachment: Reference Log with annotated perforations. Reference Log Tie in Log Add 0 feet Log: GR /CCL Log GR /CCL Log to the tie -in log to be on Date: 7/2/2005 7/2/2005 depth with the reference log. Company: PDS PDS Depths (from -to) Depths (from -to) Feet SPF Orient. Phasing Zone Ad /Re /lperf 22,140' - 22,190' 22,140' - 22,190' 50' 6 60° 0 Ivishak RePerf 0 0 0 Gas Jetting Expected? No At what Depth? N/A Requested Gun Size: 2.875 Charge: 2906 PJ Desired Penetration: 27.7 Entry Hole Diam: 0.36 Is Drawdown Necessary/Desired /Unnecessary During Perforating NA Describe below how to achieve drawdown (check w/ Pad Operator to see if necessary piping is installed) (e g. N2 Lift, Hardline Lift Gas, Gas Lift, Flow Well, Backflow Through Dram or Hardline) Tie in to Jewelry @ MD Tie in using: PDS GR /CCL Jewelry log dated 7/2/05 Minimum ID: 3.725 in Min ID Type: 4.5" XN Nipple @ 21,755 'MD WLEG Depth: 21,769 ft MD Casing Size: 4.5 in 12.6# 13 -CR Liner 3 Est Res. Pres. @ 22,245 MD - 11100' SS 5,074 psi Last Tag: 22,218 ft ELMD on 11/1/2010 with 2 -7/8" dummy guns Well: NS21 Perforation Summary Date: API #: 50- 029 - 23126 -00 On -Site Prod Engr: PBTD General Comments: . Depths Balance Referenced to BHCS Feet SPF Orient. Phasing Zone Aperf/Reperf 0/B/U - O 0/B/U O 0/B/U O O /B /U - O 0 /B /U 0 TREE= r ABB- VG! 5 -1/8" 5KSI SAFETY,ES: WELL REQUIRES A SSSV. WELLHEAD = A8B -VGI 13 -5/8" MULTIBOWL 5KSI "**4 -1/2" METBG & LNRW" ACTUATOR = BAKER NS21 KB. ELEV = 56.19' - BF. ELEV = 40.1' (CB 15.9') KOP = 100' I 988' I- 1 4 -1/2" TRM-4E SSSV w/4 -1/2" X PROF, ID = 3.812" I Max Angle = 71° @ 4233' Datum MD = 21624' Datum TVD = 10500' SS 113 -3/8" CSG, 68 #, L -80 BTC, ID = 12.415" H 4606' I GAS LIFT MANDRELS ST MD 'ND DEV TYPE VLV LATCH PORT DATE 2 8138 4495 69 SMOR DMY BK 0 04/25/04 Minimum ID = 3.725" @ 21755' I 1 13718 6482 69 SMOR DMY _ BK 0 04/25/04 4 -1/2" HES XN NIPPLE TOP OF 7" LNR H 19949' ■ 19949' H 9 -5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" I I 1 19 -5/8" CSG, 47 #, L -80 BTM-C, ID = 8.681" I-1 20205' ■ 21674' H 4 -1/2" FIBER OPTIC TRANSDUCER, ID = 3.958" I I- 21703' H ELMD LOGGED 06/01/04 I 21699' H4 -1/2" HES X NIP, ID = 3.813" I 21721' I-17" X 4 -1/2" BKR S -3 HYD PKR, ID = 3.875" 1 ■ 21744' I- 14 -1/2" HES X NIP, ID= 3.813" I 21755' I I4 -1/2" HES XN NIP, ID = 3.725" I 21784' H ELMD LOGGED 06/01 /04 I TOP OF 4 -1/2" LNR I—I 21765' 21765' I-17" X 5" BKR HRD ZXP LTP, ID = 6.20" I 4 -1/2" TBG, 12.6 #, 13CR -80 VAM -ACE, -I 21769' I I 21769' H 4 -1/2" HES WLEG, ID = 3.85" I .0152 bpf, ID = 3.958" ■ 21787' ,-17" X 5" BKR FLEX LOCK HGR, ID = 6.20" I 7" LNR, 26 #, L -80 HYDRIL 521, -1 21945' 0383 bpf, ID = 6.276" 21797' H 5" X 4-1/2" XO, ID = 3.958" I PERFORATION SUMMARY REF LOG: PDC LOG ON 06/01/04 ANGLE AT TOP PERF: 15° @ 22140' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL (MD) Opn /Sqz DATE I 2 -7/8" 6 22140 - 22200 0 01/31/10 2 -7/8" 6 22144 - 22164 0 07/31/05 2 -7/8" 6 22164 - 22184 0 01/15/05 2-7/8" 6 22184 - 22264 0 06/14/04 22213' IH (ELM D) FISH: WRP SLIPS & ELEMENTS (11/22/09) I 2 -7/8" 6 22190 - 22210 0 11/01/10 - PBTD ( 22257' lik I ? ?? H FISH, CENTRALIZER ARM I 4 -1/2" LNR, 12.6 #, 13CR -80 VAM- ACE —I 22259' � � � � � � � � • 01 .0152 bpf, ID = 3.958" DATE REV BY COMMENTS DATE REV BY COMMENTS NORTHSTAR 11/20/02 N33E INITIAL DRILL 07/06/08 WRR/PJC DRAWING CORRECTIONS WELL: NS21 04/25/04 N33E ORIGINAL COMPLETION 12/21/09 TFA /SV FISH (WRP ELEMENTS) PERMIT No: 2022180 11/01/05 RMH/PJC SET IBP @ 22101 02/03/10 RRD /PJC PERFS (01/31/10) API No: 50- 029 - 23126 -00 02/14/06 RAC/PAG WRP CORRECTION (11/01/05) 11/17/10 TA /PJC PERFS (11/01/10) SEC 11, T13N, R13E, 1249' FSL & 646' FEL 11/27/07 WRR/PJC WELLHD/ LOC CORRECTIONS 02/17/11 MB /JMD ADDED SSSV SAFETY NOTE 06/29/08 WRR/PJC DRAWING CORRECTIONS BP Exploration (Alaska) STATE OF ALASKA ALAS IL AND GAS CONSERVATION COMMISS REPORT OF SUNDRY WELL OPERATIONS 1. Operations Abandon ❑ Repair Well ❑ Plug Perforations ❑ Stimulate Other Q BULLHEAD Performed: Alter Casing ❑ Pull Tubing ❑ Perforate New Pool ❑ waiver[ Time Extension ❑ TREATMENT Change Approved Program ❑ Operat. Shutdown ❑ Perforate Re -enter Suspended Well ❑ 2. Operator BP Exploration (Alaska), Inc. 4. Well Class Before Work: 5. Permit to Drill Number: Name: Development Q Exploratory ❑ < 202 -2180 3. Address: P.O. Box 196612 Stratigraphic❑ Service ❑ 6. API Number: Anchorage, AK 99519 -6612 r 50- 029 - 23126 -00 -00 8. Property Designation (Lease Number) : 9. Well Name and Number: ADLO- 312798 I * NS21 10. Field /Pool(s): , NORTHSTAR FIELD / NORTHSTAR OIL POOL 11. Present Well Condition Summary: Total Depth measured 22261 feet Plugs (measured) None feet true vertical 11171.43 feet Junk (measured) 22213 feet Effective Depth measured 22258 feet Packer (measured) 988 19949 21721 feet true vertical 11168.5 feet (true vertical) 985 9103 10650 feet Casing Length Size MD TVD Burst Collapse Structural Conductor Surface 4562 13- 3/8 "68# L -80 44 - 4606 44 - 3207 4930 2270 Intermediate 20107 9 -5/8" 47# L -80 43 - 9260 43 - 9260 6870 4760 Production Liner 1996 7" 26# L -80 19949 - 21945 9103 - 10867 7240 5410 Liner 496 4 -1/2" 12.6# 13CR80 21765 22261 10692 - 11171 8430 7500 Perforation depth: Measured depth: SEE ATTACHED - _ - True Vertical depth: Tubing: (size, grade, measured and true vertical depth) 4 -1/2" 12.6# 13Cr80 41 -21766 4!! 41 -10692 Packers and SSSV (type, measured and true vertical depth) 4 -1/2" TRM-4E SSV 988 985 7" Liner Too Packer 19949 9103 7" 13Cr80 Packer 21721 10650 4 -1/2" Liner Too Packer 0692 12. Stimulation or cement squeeze summary: Intervals treated (measured): N L 01 Q Treatment descriptions including volumes used and final pressure: "48S Ka Oil 8i Gas Cons. 0 1433100 flomp 13. Representative Daily Average Production or Injection Oil -Bbl Gas -Mcf Water -Bbl Casing Pressure Tubing pressure Prior to well operation: 1885 41415 2978 802 Subsequent to operation: 1980 40435 3070 814 14. Attachments: 15. Well Class after work: Copies of Logs and Surveys Run Exploratory[] Development ❑r Service ❑ Stratigraphic ❑ Daily Report of Well Operations X 16. Well Status after work: Oil Gas Lj WDSPL I GSTOR ❑ WINJ ❑ WAGE] GINJ ❑ SUSP❑ SPLUG ❑ 17. 1 hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O. Exempt: 310 -263 Contact Gary Preble Printed Name Gary Preb#7 Title Data Engin Signature Phone 564 -4660 Date 11/18/201 RBDMS N O V I 9 M ! /�� w Form 10-404 Revised 1012010 � Submit Original Only NS21 202 -218 PERF ATTACHMENT Sw Name Perf Operation Code Operation Date Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 PER 6/14/04 22,184. 22,264. 11,097.04 11,174.33 NS21 APF 1/15/05 22,164. 22,184. 11,077.72 11,097.04 NS21 APF 7/31/05 22,144. 22,164. 11,058.42 11,077.72 NS21 BPS 11/1/05 22,225. 22,268. 11,136.65 11,178.19 NS21 BPP 11/22/09 22,213. 22,214. 11,125.06 11,126.02 NS21 APF 1/31/10 22,140. 22,200. 11,054.56 11,112.5 NS21 BPS 3/8/10 22,190. 22,264. 11,102.83 11,174.33 • NS21 BPP 3/31/10 22,190. 22,264. 11,102.83 11,174.33 NS21 APF 11/1110 22,190. 22,210. 11,102.83 11,122.16 AB ABANDONED PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG PULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • r NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY I 10/31/2010 ***WELL FLOWING ON ARRIVAL * ** (eline re -perf) � INITIAL T /I /O= 900/ 900/ 250 PSI LRS PUMPED SAFELUBE DOWN TBG. =CURRENTLY RIGGING UP E -LINE UNIT FOR PERFORATING. ** *JOB CONTINUED ON -1 -NOV -2010 WSR * ** 1 11/1/2010 — CONTINUED FROM 31- OCT -10 WSR * ** (eline reperf) 3TD TAGGED AT 22 218' ELM. UNABLE TO SHOOT ENTIRE PERF INTERVAL REQUESTED DUE TO TD [ DEPTH. RE -PERF FROM _22.190'- 22,21 Q' WITH_2 -7/8" HSD_ PJ 2906 HMX 'REFERENCE LOG = PDS GR/CCL LOG 2- JULY -2005 I FINAL TWO = 19751700/60 PSI FINAL VALVE VALVE POSITIONS = SWAB/WING /CHOKE CLOSED, j MASTER/SSV /SSSV OPEN, ALL VALVES OPEN TO GAUGES. j ** *JOB COMPLETE * ** 1 11/2/2010: Heat 95 bbls seawater to 140* and put in upright tank. Freeze protect unit. 1 Shutdown for night. 1 ....... 11/5/20101 Pump 96 bbls seawater heated to 95* down FL. Freeze protect unit & surface E M ines w/6 bbis neat me th. 11 /6 /2010Travel to PB. Gather parts for tr to Northstar. 11/15/20101Heat 290 bbls of Sea Water for Scale Inhibition Treatment 11/16/2010 = 3400/970/390 Scale Inhibition Treatment. Pumped into the Tbg with 136 bbls of Nalco EC5526A Access Scale inhibitor followed by 20 bbls of 80* F Diesel and 290 bbls of 120 *F Filtered Sea Water. Freeze protected Tbg with 30 bbls of ;diesel. Final WHP's = 600/670/60 Valve positions at the time of departure: Swab, Companion, Wing, SSV = Closed ?/ Master, IA, OA =Open , E ' FLUIDS PUMPED BBLS 385 SEAWATER 136 NALCO EC5526A ACCESS SCALE INHIBITOR 52 DIESEL F 57 6 METH 9 ITotal TREE= ABB- VGI5 -1/8" 5KSI WELLHEAD = ABB -VGI 13 -5/8" MULTIBOWL 5KSI N S 21 S ES: * * *4 - 1/2" CHROME TBG & LNR* ** ACTUATOR= BAKER KB. ELEV = 56.19' BF, R EV = 40.1' (CB 15.9') KOP = 100' 988' 4 -1/2" TRM-4E SSSV w/4-1/2" X PROF, ID = 3.812" Max Angle = 71 ° @ 4233' Datum MD = 21624' Datum TVD 10500' SS 13 -3/8" CSG, 68 #, L -80 BTC, ID = 12.415" 4606' GAS LIFT MANDRELS STI MD I TVD I DEV I TYPE I VLV I LATCHI PORT DATE 2 8138 4495 69 SMOR DMY BK 0 114125104 Minimum ID = 3.725" @ 21755' 1 13718 6482 69 SMOR DMY BK 0 04/25/04 4 -1/2" HES XN NIPPLE COP OF 7" LNR 19949' 19949' 9 -5/8" X 7" BKR ZXP LNR TOP 9 5/$" CSG, 47 #, L -80 BTM C, ID = 8.681" 20205' F FIBER OPTIC TRANSDUCER, ID = 3.958" 21703 ELMD LOGGED 06/01/04 21699 4 -1J2" HES X NIP, ID = 3.813" 21721 7" X 4 -1/2" BKR S -3 HYD PKR, ID = 3.875" 21744' 4 -1/2" HES X NIP, ID = 3.813" - 21755 4 -1/2" HES XN NI ID = 3.725' 217$4' ELMD LOGGED 06/01/04 TO P O -1/ "LNR 21765' 21765' 7" X 5" BKR HRD ZXP LTP, ID = 6.20" 4 -1/2" TBG, 12.6 #, 13CR -80 VAM -A 21769 21769' CE, 4 -1i2" HES WLEG, ID = 3.85 "� 015 bpf, ID = 3.958" 21787' 7" X 5" BKR FLEX LOCK HGR, ID = 6.20" 7" LNR, 26 #, L -80 HYDRIL 521 21945' 21797 5" X 4 -1/2" XO, I D = 3.958" .0383 bpf, ID = 6.276" PERFORATION SUMMARY REF LOG: PDC LOG ON 06/01/04 A NGLE AT TOP PERF: 15'@22140' Note: Refer to Production DB for historical pert data SIZE SPF I INTERVAL (MD) Opn /Sqz DATE 2 -7/8" 6 22140 - 22200 0 01/31/10 2 -7/8' 6 22144 - 22164 O 07131/05 2 -7/8" 6 22164 - 22184 0 01115105 22213' (ELMD) FISH: WRP SLIPS & ELEMENTS (11/22/09) 2 -7/8" 6 22184 - 22264 0 06/14/04 'j ?? FISH, CENTRALIZER ARM I PBTD 22257 4 -1/2" LNR, 12.6 #, 13CR -80 VAM -ACE, 22259' .0152 bpf, ID = 3.958" DATE REV BY COMMENTS DATE REV BY COMMENTS NORTHSTAR 11120/02 N33E INITIAL DRILL 07/06/08 WRR/PJC DRAWING CORRECTIONS WELL: NS21 04/25/04 N33E ORIGINAL COMPLETION 12/21/09 TFA /SV FISH (WRP ELEMENTS) PERMIT No: 2022180 11/01/05 RMH/PJC SET IBP@ 22101 02/03/10 RRD /PJC PERFS (01/31/10) API No: 50- 029 - 23126 -00 02/14/06 RAC/PAG WRP CORRECTION (11/01/05) SEC 11, TI 3N, R1 3E, 1249' FSL & 646' FEL 11/27/07 WRR/PJC WELLHD/ LOC CORRECTIONS 06/29/08 1 WRRIPJCJ DRAWING CORRECTIONS I I I BP Exploration (Alaska) • • Mark Sauve Production Engineer ~ r; r~~,~ BP Exploration (Alaska), ~:i~° k ` t;t_;~ ~~ P.O. Box 196612 d~~ ~` Anchoragc, AK 9951-6612 Re: Northstar Field, Northstar Oil Pool, NS21 Sundry Number: 310-263 Dear Mr. Sauve: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. As provided in AS 31.05.080, within 20 days after written notice of this decision, or .such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for reconsideration. A request for reconsideration is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. Sincerely, Daniel T. Seamount, Jr. Chair DATED this Z~ day of August, 2010. Encl. i ~ STATE OF ALASKA ' ~ ~~ ~~~~ / ALASK~L AND GAS CONSERVATION COMMISSI~ ,~~ APPLICATION FOR SUNDRY APPROVALS ~ 20 AAC 25.280 •~A~ ~~D ~~ 1. Type of Request: Abandon ^ Plug for Redrill ^ Perforate New Pool^ Repair Well^ Change Approved Program ^ Suspend ^ Plug Perforations ^ Perforate0 Pull Tubing ^ Time Extension ^ Operation Shutdown ^ Re-enter Susp. Well ^ Stimulate^ Alter Casing ^ ^ Other: bullhead mud acid treatment 2. Operator Name: 4. Current Well Class: 5. Permit to Drill Number: BP Exploration (Alaska), Inc. Development ^ Exploratory ^ 202-2180 - 3. Address: P.O. Box 196612 Stratigraphic ^ Service ^ 6. API Number: Anchorage, AK 99519-6612 50-029-23126-00-00 7. If perforating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: Spacing Exception Required? Yes ^ No ^ NS21 - 9. Property Designation (lease Number): 10. Field/Pool(s): .. ADLO-312798 - NORTHSTAR Field / NORTHSTAR OIL Pool 11. PRESENT WELL CONDITION SUMMARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): Plugs (measured): Junk (measured): 22261 .. 11171.43 ~ 22258. 11168.54 - NONE 22213 Casing Length Size MD TVD Burst Collapse Structural Conductor Surtace 4562 13-3/8" 68# L-80 44 4606 44 3207 4930 2270 Intermediate 20107 9-5/8" 47# L-80 43 20150 43 9260 6870 4760 Liner 1996 7"26# L-80 19949 21945 9103 10867 7240 5410 Liner 496 4-1/2" 12.6# 13CR80 21765 22261 10692 11171 8430 7500 Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): see attached - - 4-1/2" 12.6# 13Cr80 41 21766 Packers and SSSV Tvoe: 4-1/2" TRM-4E SSV Packers and SSSV MD and TVD fft): 988. 985 7" Liner Top Packer 19949 9103 7" 13Cr80 Packer .21721 10650 4-1/2" Liner Top Packer 21765. 10692 12. Attachments: Description Summary of Proposal © 13. Well Class after proposed work: Detailed Operations Program ^ BOP Sketch ^ Exploratory ^ Development Q ` Service ^ 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: 9/3/2010 Oil Q _ Gas ^ WDSPL ^ Plugged ^ 16. Verbal Approval: Date: WINJ ^ GINJ ^ WAG ^ Abandoned ^ Commission Representative: GSTOR ^ SPLUG ^ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Mark Sauve Printed Name Mark Sauve Title Production Engineer Signature Phone Date 564-4660 8/24/2010 Prepared by Ga Preble 564-4944 COMMISSION USE ONLY //,,~.~ witness Sundry Number: ~ ~ lQ~~V~ resentative ma roval: Notif Commission so that a re C diti s of a y y p on on pp Plug Integrity ^ BOP Test ^ Mechanical Integrity Test ^ Location Clearance ^ Other: ' ~ a~ ~ ~ / 1'1 Subsequent Form Required: d - ! ~ ~-( f+ a'2~x APPROVED BY Approved by: COMMISSIONER THE COMMISSION Date: ~l ~~ ~d R''BB ~. ~ ~ -!6 ~~~ Form 10-403 Revise AUG 3 0 p R I G I N A L ~ Submit in Duplicate NS21 202-218 PERF OTTOCHMENT r1 U Sw Name Operation Date Pert Operation Code Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 6/14/04 PER 22,184. 22,264. 11,097.04 11,174.33 NS21 1/15/05 APF 22,164. 22,184. 11,077.72 11,097.04 NS21 7/31/05 APF 22,144. 22,164. 11,058.42 11,077.72 NS21 11/1/05 BPS 22,225. 22,268. 11,136.65 11,178.19 NS21 11/22/09 BPP 22,213. 22,214. 11,125.06 11,126.02 NS21 1/31/10 APF 22,140. 22,200. 11,054.56 11,112.5 AB ABANDONED PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG P ULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • - - ~ • PERFORATING PROCEDURE v~<e~,~' ~IDW ~.~...~, Well: NS21 API #: 50-029-23126-00 Date: 8124110 Prod Engr Mark Sauve Office Ph: 564-4880 H2S Level: Home Ph :................336-6128................. 0 ppm Cell: 748-2865 CC or AFC: NSFLDWL21 Detail Code: Description: ,Drift to TD with DummX Gun, Pertorate .............................................................................................................................................. WBL Entries IOR T e Work Descri tion 200 S Drift to TD with 2-7/8" Dumm Gun 200 E Perforate 22,190' - 22,230' MD Well Obiectives and Los~s~ing Notes: The objective of the slickline portion of this procedure is to evaluate the extent of any restriction that might exist due to scale. The proposed , pertorations are an attempt to increase production by re-aerforating 80' of the existing oerforations_ Please note that the perforations will be dependent on the drift information. Please contact Mark Sauve with any questions, comments, or concerns - 564-4880 (w); 748-2885 (c); 338-6128 (h). Reference Log Tie in Log Add 0 feet Log: GRiCCL Lod GRlCCL Lod to the tie-in log to be on Date: 7/2/2005 . 7/2/2005 depth with the reference log. ............................. Company: PDS .............................. .............................. PDS .............................. Depths (from-to) Depths (from-to) Feet SPF Orient. Phasing Zone Ad/Re/!pert 22,190'. - 22,230' ,,,22,190'..., - 22,230' 40' 6 60° 0 ivishak RePerf - - ........... . .... .. ........ 0 .......................... ................... ....................................................................................... ................................ ............................. .............................. .............................. ... ..... . . ............ .................... 0 .......................... ................... ............................:.......................................................... ................................ ............................. .............................. .............................. . .... 0 Gas Jetting Expected? No At what Depth? N/A Requested Gun Size: 2:875 Charge: 2906,PJ,HSD Desired Penetration: ,27;7 Entry Hole Diam: „ , „ 0 ,32 Is Drawdown Necessary/Desired/Unnecessary During Perforating NA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Descritw Uelow how ro avh+eve drawdvwn ( check w/ Pad Operator to sao i/necessary piping is insta/teti) (e.g. N2 U/L Hardline LIR Gas, Gas LIR, Flow Well, Backllow Through D21n or Hardline) Tie in to Jewelry @ .....................MD Tie in using: PDS GR/CCL.Jewelry lob dated 7/2/05 Minimum ID: 3:725 in Min ID Type: ,,,,,,,,,,,4;5" XN NiQPIe ,,,,,,,,,,,, @ 21,755 'MD WLEG Depth: . 21 769 ft MD Casing Size: 4 5 in 12.6# 13-CR Liner , 3 Est Res. Pres. @ 22,245 , MD -11100' SS ....... 5,074 psi ........... . Last Tag: 22,213 ft ELMD on 11!22/2009 3.5" LIB O/B/U - O TREE = A BB-V GI 5-1 /8" 5KSI WELLHEAD = ABB-VGI 13-5/8" MULTIBOWL 5KSI ACTUATOR = BAKER KB. ELEV = 56.19' BF. ELEV = 40.1' (CB 15.9'} KOP = 100' Max Angle = 71° @ 4233' Datum MD = 21624' Datum TVD = 10500' SS 13-3/8" CSG, 68#, L-80 BTC, ID = 12.415" Minimum ID = 3.725" @ 21755' 4-1 /2" HES XN NIPPLE TOP OF 7" LNR 19945 ~ 9-518" CSG, 47#, L-80 BTM-C, ID = 8.681" ~ S TES: ***4-1 /2" CHROME TBG &LNR*** II NS21 ~~-1 988' 4-1/2" TRM-4E SSSV w J4-112" X PROF, ID = 3.812„ GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 2 1 8138 13718 4495 6482 69 69 SMOR SMOR DMY DMY BK BK 0 0 04/25/04 04/25/04 9-5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" 21674, 114-1/2" FIBER OPTIC TRANSDUCER, ID = 3.958" 21703' ELMD LOGGED 06/01/04 21699' 4-1/2" HES X NIP, ID = 3.813" 21721' - j 7" X 4-1 /2" BKR S-3 HY D PKR, ID = 3.875" 21744' 4-1/2" HES X MP, ID = 3.813" 21755' 4-1/2" HES XN NIP, ID = 3.725" 21784' ELMD LOGGED 06/01 /04 ITOPOF4-1/2" LNR 4-1/2" TBG, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" 7" LNR, 26#, L-80 HYDRIL 521, .0383 bpf, ID = 6.276" __ _. PERFORAT~N SUMMARY REF LOG: PDC LOG ON 06(01/04 ANGLE AT TOP PERF: 15° @ 22140' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL (MD) Opn/Sqz DATE 2-7/8" 6 22140 - 22200 O 01/31/10 2-7/8" 6 22144 - 22164 O 07/31/05 2-7/8" 6 22164 - 22184 O 01!15/05 2-718" 6 22184 - 22264 O 06!14!04 4-1/2" LNR, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" 21765' 7" X 5" BKR HRD ZXP LTP, ID = 6.20" 21769' 4-1/2" HES WLEG, ID = 3.85"~ 217$7' 7" X 5" BKR FLEX LOCK HGR, ID = 6.20" 21797' 5" X 4-1/2" XO, ID = 3.958" ~_ 22213' (ELM D) FISH: WRP SLIPS & ELEMENTS (11122109) ??? ~-FISH, CENTRALIZER ARM DATE REV BY COMMENTS DATE REV BY COMMENTS 11/20/02 N33E INITIAL DRILL 07/06/08 WRR/PJC DRAWING CORRECTIONS 04/25/04 N33E ORIGINAL COMPLETION 12/21109 TFA/SV FISH (WRP ELEMENTS) 11/01/05 RMH/PJC SET IBP@ 22101 02/03/10 RRD/PJC PERFS (01/31/10) 02/14!06 RAClPAG WRP CORRECTION (11/01/05) 11/27/07 WRR/PJC WELLHD/ LOC CORRECTIONS 06/29/08 WRR/PJC DRAWING CORRECTIONS NORTHSTA R WELL: NS21 PERMIT No: 2022180 API No: 50-029-23126-00 SEC 11, T13N, R13E, 1249' FSL & 646' FEL BP Exploration (Alaska) BP Exploration (Alaska) Inc. Attn: Well Integrity Coordinator, PRB-20 Post Office Box 196612 Anchorage, Alaska 99519-6612 April 21, 2010 Mr. Tom Maunder Alaska Oil and Gas Conservation Commission 333 West 7t" Avenue Anchorage, Alaska 99501 Subject: Corrosion Inhibitor Treatments of Northstar Dear Mr. Maunder, • ~~ ;` ~ . ~. ~,~~~~~A~E. ~~~~e~~' ~ncfilc~r a©~- ~, 18 NS~~ Enclosed please find a spreadsheet with a list of wells from Northstar that were treated with corrosion inhibitor in the surface casing by conductor annulus. The corrosion inhibitor is engineered to prevent water from entering the annular space and causing external corrosion that could result in a surface casing leak to atmosphere. The attached spreadsheet represents the well name, top of cement depth prior to filling and volumes of corrosion inhibitor used in each conductor. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of form 10-404, Report of Sundry Operations. If you require any additional information, please contact me or my alternate, Jerry Murphy, at 659-5102. Sincerely, Torin Roschinger BPXA, Well Integrity Coordinator • i BP Exploration (Alaska) Inc. Surface Casing by Conductor Annulus Cement, Corrosion inhibitor, Sealant Top-off Report of Sundry Operations (10-404) I ,~- J Date Northstar ai~ni~n 1 n Well Name PTD # API # Initial top of cement Vol. of cement um ed Final top of cement Cement top off date Corrosion inhibitor Corrosion inhibitor/ sealant date ft bbls ft na aI NS05 2050090 50029232440000 1.7 na 1.7 na 10 4/30/2009 NS06 2021010 50029230880000 0.5 na 0.5 na 1.7 4/30/2009 NS07 2020770 50029230810000 1.1 na 1.1 na 5.3 4/30/2009 NS08 2020210 50029230680000 0.75 na 0.75 na 3.6 4/30/2009 NS09 2012190 50029230520000 1.2 na 1.2 na 3.4 4/30/2009 NS10 2001820 50029229850000 0.25 na 0.25 na 3 4/30/2009 NS11 2060360 50029233030000 0.75 na 0.75 na 5.1 5/1/2009 NS12 2021100 50029230910000 1.2 na 1.2 na 3.2 5/1/2009 NS13 2010860 50029230170000 1.7 na 1.7 na 6.8 5/1/2009 NS14A 2052020 50029230260100 0.9 na 0.9 na 2.8 5/1/2009 NS16A 2061410 50029230960100 1.3 na 1.3 na 5.8 5/1/2009 NS17 2021690 50029231130000 1.2 na 1.2 na 2.6 5/1/2009 NS18 2021410 50029231020000 1.5 na 1.5 na 7.3 5/1/2009 NS19 2022070 50029231220000 1.5 na 1.5 na 10.2 5/2/2009 NS20 2021880 50029231180000 1.4 na 1.4 na 8.5 5/2/2009 NS21 2022180 50029231260000 1.7 na 1.7 na 4.3 5/2/2009 NS22 2022230 50029231280000 1.6 na 1.6 na 10.2 5/2/2009 NS23 2030500 50029231460000 0.75 na 0.75 na 3 5/2/2009 NS24 2021640 50029231110000 0.75 na 0.75 na 2.6 5/2/2009 NS25 2031660 50029231810000 na na 2.6 5/2/2009 NS-26 2002110 50029229960000 at surface na na na na na NS27 2010270 50029230030000 0.6 na 0.6 na 1 5/3/2009 NS28 2050160 50029232480000 1.5 na 1.5 na 8.1 5/3/2009 NS30 2052070 50029232930000 0 na 0 na 4.3 5/3/2009 NS32 2031580 50029231790000 * na * na 1.7 5/3/2009 NS33A 2081890 50029233250100 Sealed conductor na na na na NS34A 2080170 50029233010100 0 na 0 na 2.2 5/3/2009 *Not measured due to rig proximity. STATE OF ALASKA ALAS LAND GAS CONSERVATION COMMISS REPORT OF SUNDRY WELL OPERATIONS RECEIVED MAR ~ ] 201Q 1. Operations Abandon ^ Repair Well ^ Plug Perforations ^ Stimulate^ Other Performed: Alter Casing ^ Pull Tubing^ i~ Perforate New Pool ^ Waiver^ Time Extension ~~ Change Approved Program ^ Operat. Shutdown ^ Perforate ^ Re-enter Suspended Well ^ 2. Operator BP Exploration (Alaska), Inc. 4. Well Class Before Work: Permit to Drill Number: Name: Development Q Exploratory 202-2180 3. Address: P.O. Box 196612 Stratigraphic^ Service ^ .API Number: Anchorage, AK 99519-6612 50-029-23126-00-00 8. Property Designation (Lease Nu~er) : 9. Well Name and Number: ADLO-312798 ~ NS21 10. Field/Pool(s): NORTH TAR FIE S LD INORTHSTAR OIL POOL 11. Present Well Condition Summary: Total Depth measured 22261 feet Plugs (measured) None feet true vertical 11171.43 feet Junk (measured) 22213 feet Effective Depth measured 22258 feet Packer (measured) 988 19949 21721 21765 true vertical 11168.54 feet (true vertical) 985 9103 10650 10692 Casing Length Size MD TVD Burst Collapse Structural Conductor Surface 4562 13-3/8" 68# L-80 44 - 4606 44 - 3207 4930 2270 Intermediate 20107 9-5/8" 47# L-80 43 - 20150 43 - 9260 6870 4760 Production Liner 1996 7"26# L-80 19949 - 21945 9103 - 10867 7240 5410 Liner 796 4-1/2" 12.6# 13CR80 21765 - 22261 10692 - 11171 8430 7500 Perforation depth: Measured depth: SEE ATTACHED - _ _ _ _ True Vertical depth: _ _ _ _ _ Tubing: (size, grade, measured and true vertical depth) 4-1/2" 12.6# 13Cr80 41 - 21766 41 - 10693 Packers and SSSV (type, measured and true vertical depth) 4-1/2" TRM-4E SSV 988 985 7" Liner Too Packer 19949 9103 7" 13Cr80 Packer 21721 10650 4-1/2" Liner Too Packer 21765 10692 12. Stimulation or cement squeeze summary: Intervals treated (measured): ~~~;. Treatment descriptions including volumes used and final pressure: 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing pressure Prior to well operation: 1837 32297 2976 799 Subsequent to operation: 1730 31283 3054 796 14. Attachments: .Well Class after work: Copies of Logs and Surveys Run Exploratory^ Development ^~ Service ^ Daily Report of Well Operations X 6. Well Status after work: Oil ~ Gas WDSPL GSTOR ^ WAG ^ GINJ ^ WINJ ^ SPLUG ^ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O. Exempt: 310-025 Contact Gary Preble Printed Name Gary Prebl Title Data Management Engineer Signature Phone 564-4944 Date 3/29/2010 Form 10-404 ised 7/2009 RBC ~~ ppR 012010 ~ y.Z• /V Submit Original Only //ro • • NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY ACTIVITYDATE SUMMARY 3/20/2010 Travel to Northstar. Prep unit for acid job. Heat 420 bbls seawater in upright tanks to 120". 3/21/2010 Pump 100 bbls diesel @ 75* down tbg for acid tbg pickle. Standby for well to flowback. Job in progress. Continued on 3-22-10 AWGRS. 3/22/2010'Job in progress. Continued from 3-21-10 AWGRS. T/I/0=250/670/37. (Matrix 'acid treatment) Pump 227 bbls seawater down tbg followed by 3 bbls neat meth & 70 bbls diesel to displace acid. Shutdown. Turn well over to DSO. Let soak for 2 hrs. Start flowback. After 325 bbls flowed back, pump 83 bbls Mag Ox / down FL while flowing well to neutralize acid. Freeze protect surface lines w/ 2 bbls neat meth. FWHP=1300/900/92. 3/22/2010 Matrix Acid Treatment Well flowing into test separator upon arrival. Perform 12% HCL tubing pickle / 6:1 HF acid stimulation /Scale Inhibition per program dated 3/5/10 Schlumberger electronic treating report sent to town. Final T/I/0=900/660/40 Observed -50 psi increase for both diversions / 2 hour soak time /flow wel4 to test separator and well clean up tank /produce 325 bbls liquid and begin Mag Ox neutralization @ 0.25 bpm FLUIDS PUMPED BBLS 240 DIESEL 639 100 de F SEAWATER 488 3% NH4CL + F103 SURFACTANT 206 3% NH4CL + F103 + U67 MUTUAL SOLVENT 108 3% NH4CL + F103 + L66 SCALE INHIBITOR 53 12% HCL PICKLE 39 10% HCL MATRIX 108 6:1 FH MATRIX 5 NEAT 10 WAX BEADS 6#/FT 1.5PPG 30# HEC GEL 183 MAG OX 2076 TOTAL NS21 202-218 PFRF ~TTA(:HMFNT n U Sw Name Operation Date Perf Operation Code ----- -------------- Meas Depth Top -- Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 6/14/04 PER 22,184. 22,264. 11,097.04 11,174.33 NS21 1/15/05 APF 22,164. 22,184. 11,077.72 11,097.04 NS21 7/31/05 APF 22,144. 22,164. 11,058.42 11,077.72 NS21 11/1/05 BPS 22,225. 22,268. 11,136.65 11,178.19 NS21 11/22/09 BPP 22,213. 22,214. 11,125.06 11,126.02 NS21 1/31/10 APF 22,140. 22,200. 11,054.56 11,112.5 AB ABANDONED PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG P ULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • TREE= ABB-VG15-118"SKSI WELLHEAD = ABB-VGI 13-5/8" MULTIBOWL SKSI ACTUATOR = BAKER KB. ELEV = 56.19' BF. ELEV = 40.1' (CB 15.9') KOP = 100' Max Angle = 71° @ 4233' Datum MD = 21624' Datum TVD = 10500' SS 13-3/8" CSG, 68#, L-80 BTC, ID = 12.415" Minimum ID = 3.725" @ 21755' 4-1/2"' HES XN NIPPLE f ToP OF~-i 1994E I9-518" CSG, 47#, L-80 BTNt-C, ID = 8.681" I NS21 S TES: ***4-1 /2" CHROME TBG &LNR*** 14-1/2" TRM-4E SSSV w/4-1/2" X PROF, ID = 3.812" GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 2 1 8138 13718 4495 6482 69 69 SMOR SMOR DMY DMY BK BK 0 0 04!25(04 04/25104 19949' I~ 9-5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" 21674, I-) 4-112" FIBER OPTIC TRANSDUCER, ID = 3.958" 21703' ELMD LOGGED 06/01/04 21699' 4-1/2" HES X NIP, ID = 3.813" 21721' --~ 7" X 4-112" BKR S-3 HYD PKR, ID = 3.875" 21744' 4-112" HES X NIP, ID = 3.813" 21755' 4-1/2" HES XN NIP, ID = 3.725" 21784' ELMD LOGGED 06101!04 `TOP OF 4-1 /2" LNR 4-1/2" TBG, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" 7" LNR, 26#, L-80 HYDRIL 521, .0383 bpf, ID = 6.276" PERFORATION SUMMARY REF LOG: PDC LOG ON 06/01/04 ANGLE AT TOP PERF: 15° @ 22140' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL (MD} Opn/Sqz DATE 2-7/8" 6 22140 - 22200 O 01/31/10 2-7/8" 6 22144 - 22164 O 07/31/05 2-7/8" 6 22164 - 22184 O 01115/05 2-7/8" 6 22184 - 22264 O 06/14!04 L .- 4-1/2" LNR, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" 21765' 7" X 5" BKR HRD ZXP LTP, ID = 6.20" 21769' 4-1/2" HES WLEG, ID = 3.85" 21787' 7" X 5" BKR FLEX LOCK HGR, ID = 6.20" 21797' S" X 4-112" XO, ID = 3.958" I(ELMDy FISH: WRP SLIPS & ELEMENTS (11/22109) I FISH, CENTRALIZER ARM DATE REV BY COMMENTS DATE REV BY COMMENTS 11!20/02 N33E INITIAL DRILL 07106!08 WRR/PJG DRAWING CORRECTIONS 04/25104 N33E ORIGINAL COMPLETION 12121!09 TFA/SV FISH (WRP ELEMENTS) 11/01/05 RMH(PJC SET IBP @ 22101 02103!10 RRD/PJC PERFS (01/31/10) 02/14/06 RAC/PAG WRP CORRECTION (11/01(05) 11/27/07 WRR/PJC WELLHD/ LOC GORRECTIONS 06/29/08 WRR/PJC DRAWING CORRECTIONS NORTHSTAR WELL: NS21 PERMfT' No:2022180 AP1 No: 50-029-23126-00 SEC 11, T13N, R13E, 1249' FSL & 646' FEL BP Exploration (Alaska} STATE OF ALASKA ALASK~L AND GAS CONSERVATION COMMISS REPORT OF SUNDRY WELL OPERATIONS 1. Operations Abandon ^ Repair Well ^ Plug Perforations ^ Stimulate^ Performed: Alter Casing ^ Pull Tubing^ Perforate New Pool ^ Waiver^ Time Extension ^ A~~tic hAtApM Change Approved Program ^ Operat. Shutdown ^ Perforate Q Re-enter Suspended Well ^ 2. Operator BP Exploration (Alaska), Inc. 4. Well Class Before Work: .Permit to Drill Number: Name: Development 0 Exploratory ^ 202-2180 3. Address: P.O. Box 196612 Stratigraphic^ Service ^ API Number: Anchorage, AK 99519-6612 50-029-23126-00-00 8. Property Designation (Lease Number) : 9. Well Name and Number: ADLO-312798 ~ NS21 10. Field/Pool(s): NORTHSTAR FIELD / NORTHSTAR OIL POOL 11. Present Well Condition Summary: Total Depth measured 22261 feet Plugs (measured) None feet true vertical 11171.43 feet Junk (measured) 22213 feet Effective Depth measured 22258 feet Packer (measured) 988 19949 21721 21765 true vertical 11168.54 feet (true vertical) 985 9103 . 10650 10692 Casing Length Size MD TVD Burst Collapse Structural Conductor Surface 4562 13-3/8" 68# L-80 44 - 4606 44 - 3207 4930 2270 Intermediate 20107 9-5/8" 47# L-80 43 - 20150 43 - 9260 6870 4760 Production Liner 1996 7"26# L-80 19949 - 21945 9103 - 10867 7240 5410 Liner 796 4-1/2" 12.6# 13CR80 21765 - 22261 10692 - 11171 8430 7500 Perforation depth: Measured depth: SEE ATTACHED - True Vertical depth: _ ~@~P.=`~~ _ _ _ _ Tubing: (size, grade, measured and true verti depth) 4-1/2" 12.6# 13Cr80 41 - 21766 41 - 10693 Packers and SSSV (type, measured and true vertical depth) 4-1/2" TRM-4E SSV -•- ~ 988- •-•- 985 7" Liner Toa Packer 19949 9103 7"13Cr80 Packer 21721 10650 4-1/2" Liner Too Packer 21765 10692 12. Stimulation or cement squeeze summary: Intervals treated (measured): ~j ~ ~~ ~.„tj~ r~~ ,, ,~ ~~~ , 1~ . -~ ~~i c ~C . ..a . . :: ?t . Treatment descriptions including volumes used and final pressure: 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing pressure Prior to well operation: 1814 28543 2520 788 Subsequent to operation: 2287 36163 3151 816 14. Attachments: .Well Class after work: Copies of Logs and Surveys Run Exploratory^ Development Q Service ^ Daily Report of Well Operations X Well Status after work: Oil ~ Gas WDSPL GSTOR ^ WAG ^ GINJ ^ WINJ^ SPLUG ^ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O. Exempt: 309-422 Contact Gary Preble Printed Name Gary Preb Title Data Management Engineer Signature Phone 564-4944 Date 2/9/2010 R~~~w~o Form 10-404 Reed 7/2009 1'it3DMS FEB 11 Z01O ~ - -~ ~ Submi Origina110~n1~~ ,,.~! ~,~ ~,,, Z . NS21 202-218 ocor n-rTer-uiuGtiT Sw Name Operation Date Perf Operation Code Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 6/14/04 PER 22,184. 22,264. 11,097.04 11,174.33 NS21 1/15/05 APF 22,164. 22,184. 11,077.72 11,097.04 NS21 7/31/05 APF 22,144. 22,164. 11,058.42 11,077.72 NS21 11/1/05 BPS 22,225. 22,268. 11,136.65 11,178.19 NS21 11/22109 BPP 22,213. 22,214. 11,125.06 11,126.02 NS21 1/31/1 22,140. 22,200. 11,054.56 11,112.5 AB ABANDONED PER PERF APF ADD PERF RP REPERF BPP BRIDGE PLUG P ULLED SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • • NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY ACTIVITYDATE SUMMARY 1/30/2010*"*WELL FLOWING ON ARRIVAL*** (E-LINE PERFORATING) INITIAL T/I/0= 3300/1090/432 PSI ~ RIH WITH 2-7/8" PJ HSD GUNS ' j START PUMPING SAFE LOBE 0.5 BPM WHILE RIH WITH TOOL STRING. ;INCREASED OVER TIME TO -1.5 BPM TO ASSIST IN RIH THROUGH ' ~ ;DEVIATIONS AND TO REDUCE FRICTION DRAG COEFFICIENT WHILE ;POOH. ; I ~**"JOB IN PROGRESS AND CONTINUED ON 31-JAN-2010 WSR"** E 1/30/20101T/I/0=3300/940/100. (Assist a-line w/ Safelube) Heat upright tank to 125*. ;Circulate tank w/ Safelube & defoamer. Spear into tbg w/ 5 bbls neat meth followed by 340 bbls seawater mixed w/ 1 drum Safelube & 5 gals Defoam-X to ;assist E-line in RIH. Job in progress. Continued on 1-31-10 AWGRS. 1/31/2010*'`*LOG CONTINUED FROM 30-JAN-2010""*(E-LINE PERFORATING) :LRS DOWN ON PUMPS. TOTAL FLUIDS PUMPED: 5 BBLS METH SPEAR FOLLOWED BY 340 BBLS SEAWATER WITH 1 BBLS SAFE LUBE AND 5 GALLONS DEFOAM-X FOLLOWED BY 30 BBLS METH SHUT-IN HARD LINE AT COMPANION VALVE ;RUN CORRELATION AND TIE-IN STRIPS PULL INTO POSITION AND FIRED F 1 ST GUN. ;PERFORATE 22180'-22200' WITH 2-7/8" PJ HSD 6 SPF 60 DEG PHASING, CCL STOP DEPTH = 22175.7', CCL TO TOP SHOT = 4.3' 'GOOD SURFACE INDICATION, POOH, ALL SHOTS FIRED. RIH WITH 2ND GUN RUN. E„~ RFORATE 22160'-22180' WITH 2-7/8" PJ HSD 6 SPF 60 DEG PHASING, CCL STOP DEPTH = 22155.7', CCL TO TOP SHOT = 4.3' GOOD SURFACE INDICATION, POOH, ALL SHOTS FIRED. RIH WITH 3RD GUN RUN. 3 ERFORATE 2214_0'-22160' WITH 2-7/8" PJ HSD 6 SPF 60 DEG PHASING, CCL STOP DEPTH = 22135.T, CCL TO TOP SHOT = 4.3' ;GOOD SURFACE INDICATION, POOH, CONFIRM ALL SHOTS FIRED. TREE CAP SECURED, CONTROL ROOM NOTIFIED, WELL TURNED BACK PTO PRODUCTION. SSV AND SSSV BACK TO PAD OPERATOR. 'FINAL T/I/O = 2100/797/52 CONTINUE RIGGING DOWN EQUIPMENT FOR CREW TO LEAVE NORTH € STAR. __ *'"*JOB IN PROGRESS AND RIG DOWN CONTINUED ON 1 FE_B-2_010 WSR*** 1/31/2010 Job in progress Contmuedvfrom 1-30 10. Complete pumping Safelube down tbg fto assist E-Line in RIH. Freeze protect tbg w/ 30 bbls neat meth. FWHP=1050/700/0. E-Line still on well upon LRS departure. • 2/1/2010 ***CONTINUED FROM 31-JAN-2010*"** E-LINE (PERFORATING) .RIG DOWN E-LINE `DE-MOBILIZE BACK TO PRUDHOE BAY `FINAL T/I/O = 2100/797/52 PSI SWELL RETURNED TO PAD OPERATOR AND RETURNED TO PRODUCTION ****JOB COMPLETE'"*** FLUIDS PUMPED BBLS 37 METH 1 SAFE LURE 1 DIESEL 39 Total TREE _ WELLHEAD = AB8-VGI 13-5/8" MULTIBOWL SKSI ACTUATOR = BAKER KB, ELEV = ~ 56.19' BF. ELEV = 40.1' (CB 15.9') KOP = 100' Max Angle = 71° @ 4233' Datum MD = __ __ _ 21624' . Datum TV D = 10500' SS ' NS21 13-318" CSG, 68#, L-80 BTC, ID = 12.415" Minimum 1D = 3.725" @ 21755' 4-1 /2" HES XN NIPPLE rP OF~-f 19945 ~ 9-5/8" CSG, 47#, L-80 BTM-C, ID = 8.681" ~ S ES: ***4-112" CHROME TBG &LNR*** ~ 4-1 /2" TRM-4E SSSV w 14-1 /2" X PROF, ID = 3.812" ~ GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 2 1 8138 13718 4495 6482 69 69 SMOR SMOR DMY DMY BK BK 0 0 04/25104 04/25!04 19949' I-~ 9-5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" 21674, ~ 4-1/2" FIBER OPTIC TRANSDUCER, ID= 3.958" (21703' ELMD) 21699' 4-112" HES X NIP, ID = 3.813" TOP OF 4-1/2" LNR 1-1/2" TBG, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" 7" LNR, 26#, L-80 HYDRIL 521, .0383 bpf, ID = 6.276" PERFORATION SUMMARY REF LOG: PDC LOG ON 06/01/04 ANGLE AT TOP FERF: 15° @ 22144' Note: Refer to Production DB for historical pert data SIZE SPF INTERVAL (MD) Opn/Sqz DATE 2-7/8" 6 22144 - 22164 O 07/31/05 2-718" 6 22164 - 22184 O 01/15/05 2-7/8" 6 22184 - 22264 O 06/14/04 ABB-VGI5-1/8" 5KS1 PBTD 4-1/2" LNR, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" ~ FISH: WRP SLIPS & ELEMENTS (11122/09) ~ FISH, CENTRALIZER ARM DATE REV BY COMMENTS DATE REV BY COMMENTS 11!20/02 N33E INITIAL DRILL 07!06/08 WRR/PJC DRAWING CORRECTIONS 04!25!04 N33E ORIGINAL COMPLEfiON 12/21/09 TFA/SV FISH (WRP ELEMENTS) 11/01/05 RMH/PJC SET IBP @ 22101 02114!06 RAG/PAG WRPGORRECTION(11/01!05) 11/27(07 WRR/PJC WELLHD/ LOC CORRECTIONS 06!29/08 WRR/PJC DRAWING CORRECTIONS NORTHSTA R WELL: NS21 PERMrf No:2022180 API No: 50-029-23126-00 SEC 11, T13N, R13E, 1249' FSL & 646' FEL BP Exploration (Alaska) 21721' -~ 7" X 4-1/2" BKR S-3 HYD PKR, ID = 3.875" 21744' - 4-112" HES X NIP, ID = 3.813" 21755' 4-112" HES XN NIP, ID = 3.725" (21784' ELM 21765' 7" X 5" BKR HRD ZXP LTP, ID = 6.20" 21769' 4-1/2" HES WLEG, ID = 3.85" 21787' 7" X 5" BKR FLEX LOCK HGR, ID = 6.20" 21797' 5" X 4-1 /2" XO, ID = 3.958" • SEAN PARNELL, GOVERNOR ~T L7tart-1~~t7~R~AT O~ L~l~i/ 1i~17 333 W. 7th AVENUE, SUITE 100 COISSER~AiIO" CO~SSIOi~ ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Mr. Jack Lau Well Engineer BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, Alaska 99519-6612 `:,'..~{,~~~i~3 ~ ~~t~ ~€ ~.~'. ~n~ d ~ ~,l ~ Re. Northstar Field, Northstar Oil Pool, NS21 Sundry Number: 310-025 Dear Mr. Schmoyer: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. Sincerely, DATED this ~ day of February, 2010 Encl. STATE OF ALASKA "' ALASK~L AND GAS CONSERVATION COMMI SI~ APPLICATION FOR SUNDRY APPROVALS 20 AAC 25.280 1. Type of Request: Abandon ^ Plug for Redrill ^ Perforate New Pool^ Repair Well ^ hange 9pp rpv rogram e d Suspend ^ Plug Perforations ^ Perforate^ Pull Tubing ^ e g~ cc ~~ Time"EXtension ^ Operation Shutdown ^ Re-enter Susp. Well ^ Stimulate^~ - Alter Casing ^ ^ Other: bullhead mud acid treatment 2. Operator Name: 4. Current Well Class: 5. Permit to Drill Number: BP Exploration (Alaska), Inc. Development ^ , Exploratory ^ 202-2180 3. Address: P.O. Box 196612 Stratigraphic ^ Service ^ 6. API Number: Anchorage, AK 99519-6612 50-029-23126-00-00 7. If pertorating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: Spacing Exception Required? Yes ^ No ^ NS21- 9. Property Designation (Lease Number): 10. Field/Pool(s): ADLO-312798 ~ NORTHSTAR Field / NORTHSTAR OIL Pool 11. PRESENT WELL CONDITION SUMMARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): Plugs (measured): Junk (measured): 22261 r 11171.43 - 22258. 11168.54. NONE 22213 Casing Length Size MD TVD Burst Collapse Structural Conductor Surface 4562 13-3/8" 68# L-80 44 4606 44 3207 4930 2270 Intermediate 20107 9-5/8" 47# L-80 43 20150 43 9260 6870 4760 Liner 1996 7"26# L-80 19949 21945 9103 10867 7240 5410 Liner 496 4-1/2" 12.6# 13CR80 21765 22261 10692 11171 8430 7500 Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): see attached - - 4-1/2" 12.6# 13Cr80 41 21766 Packers and SSSV Tvpe: 4-1/2" TRM-4E SSV Packers and SSSV MD and TVD (ft): 988 985 7" Liner Top Packer 19949 9103 7" 13Cr80 Packer 21721 10650 4-1/2" Liner Top Packer 21765 10692 12. Attachments: Description Summary of Proposal ^ 13. Well Class after proposed work: Detailed Operations Program ^ BOP Sketch ^ Exploratory ^ Development Q • Service ^ 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: 2/6/2010 Oil ^~ - Gas ^ WDSPL ^ Plugged ^ 16. Verbal Approval: Date: WINJ ^ GINJ ^ WAG ^ Abandoned ^ Commission Representative: GSTOR ^ SPLUG ^ 17. I hereby certify that the foregoin is true and correct to the best of my knowledge. Contact Jack Lau Printed Name Jack La Title Well Engineer Signature Phone Date 5645102 1/27/2010 Prepared by Gary Preble 564-4944 COMMISSION USE ONLY Conditions of approv :Notify Commission so that a representative may witness Sundry Number: 3/~ ~ (/~~ Plug Integrity ^ BOP Test ^ Mechanical Integrity Test ^ Location Clearance ^ Other: Subsequent Form Required: ! C~ .!~/ APPROVED BY COMMISSIONER THE COMMISSION A d b 22 Date: ~"J "~0 pprove y: -- -- ABDMS fEB o a ~~ 1 ~ ~ z ~:~o Form 10-403 Revised 1 009 REC~IV~ IAN 2 7 210 ian ~~~ Submit in Duplicate NS21 202-218 PERF ATT~4CHMENT Sw Name Operation Date Perf Operation Code Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 6/14/04 PER 22,184. ~ 22,264. 11,097.04 11,174.33 NS21 1/15/05 APF 22,164. 22,184. 11,077.72 11,097.04 NS21 7/31/05 APF 22,144. + 22,164. 11,058.42 11,077.72 NS21 11/1/05 BPS 22,225. 22,268. 11,136.65 11,178.19 NS21 11/22/09 BPP 22,213. 22,214. 11,125.06 11,126.02 AB ABANDONED. PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG P ULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE u No portion of the below should be performed w/out first ~ing time to ensure ~~ No Accidents, N arm to People, and No damage to a Environment To: Jerry Bixby/Clark Olsen Date: December 23, 2009 Well Operations Supervisors From: Jack Lau, Wells Engineer (w: 564-5102 c: 227-2760) Mark Sauve, Northstar PE (w: 564-5972, c: 244-0529) Subject: NS21 Bullhead Mud Acid and SIT Treatment Please perform a bullhead acid treatment on NS21 per the below procedure. 1 S Drift DMY WRP 2 E Set WRP for Zonal Isolation (pre-acid) 3 F Bullhead Acid Treatment w/ Diversion 4 F Bullhead SIT w/ Diversion (post- acid) Current Status: Natural Flow Producer Last Test: 12/11/09: 1,550 BOPD, 2,529 BWPD, & 7,107 MSCFD Max Inclination: 71.5° at 4,233' md; 16° at Perfs Max Dog Leg: 4.2 deg/100' at 2,338' and Minimum ID: 3.725" at the 4'/2" XN Nip @ 21,755' MD Last TD tag: 12/12/09: Tagged top of WRP @ 22,213'ELM w/ 3.5" LIB Last Downhole Op: 12/12/09: Memory PPROF Latest H2S value: Field Produced Gas 4 ppm -Taken from HP Separator 06/11/07 BHP/BHT: 5,074 psi/ 246°F @ 11,100 ft ss Objective The following are the objectives of this well intervention design: 1) Set a WRP to isolate the lower high water interval. 2) Stimulate the upper interval with a bullhead multi stage diverted mud acid treatment. 3) Follow up the acid stimulation with a bullhead SIT treatment using EC5526 (to be sent in separate program). Well History Due to directional data problems, the original perforations in NS21 went 18' below the oil water contact. The initial perforations and first set on add-perfs both declined at severe rates (~90%/yr). The formation of CaCO3 scale in the new perforations that have never been inhibited was strongly suspected. Therefore, a combination acid/scale inhibitor treatment was completed in April 2005. NS21 Bullhead Mud Acid & SIT Treatment Page 1 of 6 No portion of the below ~ should be performed w/out first Ing time to ensure No Accidents, Na*Ifarm to People, and No damage toe Environment Following the July acid/scale inhibition treatment additional adperfs were shot and an attempted cement dump bail was executed in July 2005. A Weatherford 3.68" WRP was then set at 22,225' MD in November 2005 (followed by a fishing job due to parted slickline). The water-shut off attempt did not curtail water production. Another bullhead acid treatment was performed February 2, 2007 in an attempt to remove any scale that may have formed in NS21 since its last treatment, April 5, 2006. While the first test post-bullhead acid treatment indicated a 300 BOPD jump in production, the well's downhole pressure and surface temperature were very erratic. Following a 4/22/07 drift, NS21's production jumped to above the rate seen following the February 2007 bullhead acid treatment. The well's erratic behavior and significant rate increase following the April drift indicates a mechanical obstruction -possibly a loose WRP. In November of this year the WRP was tagged Cc~ 22,213' MD and the core of the plug recovered. Flow cutting on the recovered WRP core strongly indicated that flow was bypassing the plug for some time. The lower section of the WRP body including rubber elements and slips was left in hole. The WRP was tagged at 22,213' ELM during a memory PPROF on 12/12/09. Based on the declining benefit of HCI treatments on NS21 and success of the 2009 NS05 mud acid treatment, the below mud acid/scale inhibition treatment is proposed to stimulate the well and inhibit against scale formation. A WRP will be set to isolate the lower high water interval and a multi stage diversion treatment will be performed to stimulate the upper perforation intervals Due to the large volume of work planned for the spring ice road season at Northstar the slickline step should be performed prior to mid February. Note: NS21 is completed with 4'/2" Chrome Tubing and Liner A summary of well work activity is outlined below. Operational Highlights ** [Add New] [View Recent] (Hofer this data Js associated to the origrna! weJJ and any subsequent weJJbores, sidetracks, and Jaterals) .Date Comments_ 11/22/2009 .Tagged WRP @ 22,213' ELMD (corrected}. Pulled core of WRP with slickline (left lower outer body including slips housing & Edit Delete sealing elements in hole} 02/02/2007 Bullhead Acid Treatment (no L066} --~ 360 bbls oil inc. Edit Delete 04/05/2006 Acid Only (na L066}: --a 659 bbls oil inc. Edit Delete 11/12/2005... ,Set CIPB to plug back (perfs below OWC} _ . _ _ __ _ _ Edit Gelete .07/31/2005. APF 22,144' - 22,164' after aborting dump bail plug back :Edit Delete .05/02/2005 '.Acid/SIT w. L066: --> X1000 bhls oil inc. 1000 BWPD ino. Edit Delete Ol/16/2005 ' APF: 22,164' - 22,184 ................ Edit Gelete 08/02/2004 'memory SCMT _ _ Edit Delete 07/29/2004 Repalce shear valve with dummy. _ __ _ __ Edit Delete 06/26!2004 :SIT w.V}{7377 _ .Edit Gelete 06/13/2004 Initial Perfs: 22,184' - 22,264' (80') _ _ _. .Edit Gelete 05/22/2004 Initial slickline/Gyro and PDC logs. No portion of the below should be performed w/out first ~ing time to ensure No Accidents, N arm to People, and No damage to a Environment Basic Program Phases Slickline • Drift Dummy WRP E-line • Set WRP for zonal isolation Fullbore • Tubing Pickle • Immediate Pickle Flowback • HCI Pre-Flush • 1St Stage Mud Acid Treatment • Wax Bead Diversion • HCI Pre-Flush • 2"d Stage Mud Acid Treatment • Wax Bead Diversion • HCI Pre-Flush • 3`d Stage Mud Acid Treatment • Flowback Spent Acid • Immediate Flowback of Spent Acid • Scale Inhibition Treatment • Sampling Program Please contact Jack Lau 564-5102 (w); 227-2760 (c) or Mark Sauve 564-5972 (w); 244-0529 (c) with any questions, comments, or concerns ~'~ Slickline -Pre-Mud Acid Treatment 1) MIRU SL. Drift 4~h" WFD Special Clearance DMY WRP (3.680" OD) and sample bailer to toy of WRP fish at 22,213'ELM. POOH. • 12/12/09: Tagged top of WRP fish C~ 22,213'ELM. The WRP core was pulled on 11 /22/09, the lower section including rubber elements and slips remained downhole. E-Line -Set WRP. to Isolate ..High Water Perfs (pre-acid) 2) Set mid element of 4.5" special clearance WRP at 22,190'ELMD. . Stimulation Target 1VJL1 bullhead Mud Acid ~ 51 t treatment Page 3 oT b No portion of the below should be performed w/out first~ing time to ensure No Accidents, arm to People, and No damage to a Environment NS21 Bullhead Mud Acid & SIT Treatment Page ~ of 6 No portion of the below w~ should be performed w/out first ng time to ensure . No Accidents, N arm to People, and No damage to Environment 6) Reduce wellbore temperature and condition formation rock by pumping 390 bbls of filterec NH4C1 + Surfactant F103 preheated to 85-90°F at 4-6b pm. 7) Bullhead three stage acid treatment with wax bead diversion down the tubing. per the treatment schedule below. Mud Acid Treatment Design Schedule NS11 Mud Acid Schedule Fluid Fluid Cum Stage # Stage Fluid Vol Rate Time Time Descri tion T e bbl b m min min 1 Wellbore Coolin 3% NH4CI no U67 360 3.0 120 120 2 Conditioning 3% NH4CI 30 3.0 10 130 3 Acid Pre-Flush 10% HCI 36 3.0 12 142 4 Acid 6:1 Mud Acid 36 3.0 12 154 5 Over Flush 3% NH4CI 72 3.0 24 178 6 Diversion 1.5 PPA Wax Beads + 30#HEC 5.0 3.0 2 180 7 Spacer 3% NH4CI 10 3.0 3 183 8 Acid Pre-Flush 10% HCI 37 3.0 12 195 9 Acid 6:1 Mud Acid 37 3.0 12 208 10 Over Flush 3% NH4CI 74 3.0 25 232 11 Diversion 1.5 PPA Wax Beads + 30#HEC 5.0 3.0 2 234 12 Spacer 3% NH4CI 10 3.0 3 237 13 Acid Pre-Flush 10% HCI 37 3.0 12 250 14 Acid 6:1 Mud Acid 37 3.0 12 262 15 Over Flush 3% NH4C1 89 3.0 30 292 16 Displacement Seawater 251 3.0 84 375 17 Dis lacement Diesel 70 3.0 23 399 Cumulative 399 min Time 7 hrs Acid Flowback with MagOx Neutralization 8) Line-up the well to flow into the test separator and we ll cleanup tank for flowback. Flowbacb acid while slip streaming MagOx slurry for neutralizatio n. 9) Once clean-up volume of 1262 bbls is produced (Tre atmen t 1196 bbl + 66 Flowline), diver back to the plant and get two 6-hour tests. Procedure Contacts: NS21 Bullhead Mud Acid & SIT Treatment Page 5 of 6 ' No portion of the below should be performed w/out first~ing time to ensure No Accidents, arm to People, and No damage to a Environment Please contact Jack Lau 564-5102 (w); 227-2760 (c) or .Mark Sauve 564-5972 (w); 244-0529 (c) with any questions, comments, or concerns NS21 Bullhead Mud Acid & SIT Treatment Pabe 6 of 6 ' ~ V4'ELLHLAD = ABB-VGI 13-5/8" MULTIBOWL 5KSI ACTUATOR = BAKER KB. ELEV = 56.19' i BF. ELEV = 40.1' {CB 15.9') KOP = 100' Max Angle = ~ 71° @ 4233' Datum MD = ~ 21624' I Datum TVD = 10500' SS 3-318" CSG, 68#, L-80 BTC, ID = 12.415" Minimum ID = 3.725" @ 21755' 4-1 /2" HES XN NIPPLE TOP OF 7" LNR ~I-~ 19944 9-518" CSG, 47#, L-80 BTM-C, ID = 8.681" ~ N ~ 21 I SAF~OTES: ***4-1 t2" CHROME TBG &LNR*** 9$$' 4-1/2" TRM-4E SSSV w 14-1/2" X PROF, ID = 3.812" GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 2 1 8138 13718 4495 6482 69 69 SMOR SMOR DMY DMY BK BK 0 0 04/25/04 04!25(04 19949' I~ 9-5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" 21674' I 4-1/2" FIBER OPTIC TRANSDUCER, ID = 3.958" (21703' ELMD) 21699' 4-112" HES X NIP, ID = 3.813" (TOP OF 4-1/2" LNR 4-1/2" TBG, 12.6#, 13CR-80 VAM-ACE, .0152 bpf, ID = 3.958" 7" LNR, 26#, L-80 HYDRIL 521, .0383 bpf, ID = 6.276" PERFORATION SUMMARY REF LOG: PDC LOG ON 06/01/04 ANGLE AT TOP PERF: 15° @ 22144' Note: Refer ko Production DB for historical perf data SIZE SPF INTERVAL (MD} Opn/Sqz DATE 2-7/8" 6 22144 - 22164 Zo O 07/31/05 2-718" 6 22164 - 221$4 Le O 01/15!05 2-7/8" 6 22184 - 22264 ~b O 06!14/04 21721, 117" X 4-1/2" BKR S-3 HYD PKR, ID = 3.875" 21744' 4-112" HES X NIP, ID = 3.813" 21755' 4-1/2" HES XN NIP, ID = 3.725" (21784' ELM 21765' 7" X 5" BKR HRD ZXP LTP, ID = 6.20" 21769' 4-1(2" HES WLEG, ID = 3.85"~ 21787' 7" X 5" BKR FLEX LOCK HGR, ID = 6.20" 21797' 5" X 4-112" XO, ID = 3.958" I FISH: WRP SLIPS & ELEMENTS (11/22/09) I ??? 1FISH, CEN'fRALIZERARM PBTD 22257' 4-1I2" LNR, 12.6#, 13CR-80 VAM-ACE, 22259' .0152 bpf, ID = 3.958" DATE REV BY COMMENTS DATE REV BY COMMENTS NORTHSTAR 11!20!02 N33E INITIAL DRILL 07!06/08 WRR/PJC DRAWING CORRECTIONS WE1L: NS21 04!25104 N33E ORIGINAL COM PLETiON 12/21/09 TFAlSV FISH (WRP ELEMENTS) PERMIT No: x2022180 11!01/05 RMH/PJG SET' IBP @ 22101 API No: 50-029-23126-00 02(14/06 RAC/PA WRP CORRECTION (11101/05} SEC 11, T13N, R13E, 1249' FSL & 646' FEL 11/27/07 WRR/PJC WELLHD/ LOC CORRECTIONS 06!29/08 WRR/PJC DRAWING CORRECTIONS BP Exploration (Alaska) ~~ Date: 01-04-2010 Transmittal Number: 93120 fq I ~'~( aea I ~~35 a~~l~~ 1~~~~ ~a -1`6`7i i~i~ 20~ at~b 1`1 i3'~ BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have anv auesti~ns_ please contact _Tne T .achifka at (9n715hd_4(191 Deliver Contents Bottom SW Name Date Contracto Run To De th De th Descri tion MEMORY PRODUCTION NS34A 12-20-2009 SCH 1 16000 19082 PROFILE PSP CD-ROM -MEMORY NS34A 12-20-2009 SCH PRODUCTION PROFILE PSP MEMORY PRODUCTION NS22 12-16-2009 SCH 1 12208 12826 PROFILE PSP CD-ROM -MEMORY NS22 12-16-2009 SCH PRODUCTION PROFILE PSP CD-ROM - LDWG EDIT OF RST LOG DATA IN TIF FORMAT, NS33A 11-10-2009 SCH 25482 15961.5 WITH FINAL PDS DISPLAYS MEMORY PPROF WITH DEFT NS20 12-15-2009 SCH 1 17452 18489 AND GHOST CD-ROM -MEMORY PPROF NS20 12-15-2009 SCH WITH DEFT AND GHOST MEMORY PPROF WITH DEFT NS21 12-12-2009 SCH 1 20520 22184 AND GHOST CD-ROM -MEMORY PPROF NS21 12-12-2009 SCH WITH DEFT AND GHOST Please ign d Re one copy of this transmittal. Thank You, ~~ a ~~ `~ `~ ~"s Joe Lastufka ~~~ ~±~.~'~.~ ~ `~ Petrotechnical Data Center BPXA AOGCC DNR Murphy Exploration MMS ~0~-D I `~ 191~~ ~~ +(3- 7. ^n ~ David Fair Christine Mahnken ~/ Corazon Manaois Ignacio Herrera Doug Chromanski Petrotechnical Data Center LR2-1 900 E. Benson Bled. PO Box 196612 Anchorage, AK 99~ 19-6612 SEAN PARNELL, GOVERNOR U -J AIASKA OIL A" GAS 333 W. 7th AVENUE, SUITE 100 CONSERVATION COMHSSION ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Mr. Mark Sauve Production Engineer BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, Alaska 99519-6612 , 0 Re: Northstar Field, Northstar Oil Pool, NS21 Sundry Number: 309-422 < - - , 6 , NED 2009 , AN Dear Mr. Sauve: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. Sincerely, 4. No * si om sioner DATED this /9 day of December, 2009 Encl. STATE OF ALASKA '� ALAS IL AND GAS CONSERVATION COAISS APPLICATION FOR SUNDRY APPROVALS RE(7 20 AAC 25.280 1. Type of Request: Abandon ❑ Suspend ❑ Operational shutdown ❑ Perforate 2]- Re -ente e Alter casing ❑ Repair well ❑ Plug Perforations ❑ Stimulate ❑ Other ❑ Speci Change approved program ❑ Pull Tubin r"' "°' re+� c ommission g ❑ Perforate New Pool ❑ Time Extension ❑ 0 "` ^ "'' "°' 2. Operator Name: 4. Current Well Class: 5. Permit to BP Exploration (Alaska), Inc. Development Q, Exploratory ❑ 202 -2180 - 3. Address: P.O. Box 196612 Stratigraphic ❑ Service ❑ 6. API Number: Anchorage, AK 99519 -6612 50- 029 - 23126 -00 -00 - 7. If perforating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: Spacing Exception Required? Yes ❑ No NS21- 9. Property Designation (Lease Number): 10. Field / Pool(s): ADLO- 312798 - NORTHSTAR Field / NORTHSTAR OIL Pool 11. PRESENT WELL CONDITION SUMMARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): Plugs (measured): Junk (measured): 22261 11171.43 22258 e 11168.54 NONE 22260 Casing Length Size MD TVD Burst Collapse Structural Conductor Surface 4562 13 -3/8" 68# L -80 44 4606 44 3207 4930 2270 Production 20107 9 -5/8" 47# L -80 43 20150 43 9260 6870 4760 Liner 1996 7 "26# L -80 19949 21945 9103 10867 7240 5410 Liner 496 4 -1/2" 12.6# 13CR80 21765 22261 10692 11171 8430 7500 Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): see attached - - 4 -1/2" 12.6# 13Cr80 41-21766 Packers and SSSV TVDe: 4 -1/2" TRM -4E SSV Packers and SSSV MD and TVD (ft): 988 7" Liner TOD Packer 19949 7" 13Cr80 Packer 21721 4 -1/2" Liner TOD Packer 21765 12. Attachments: Description Summary of Proposal 13. Well Class after proposed work: Detailed Operations Program ❑ BOP Sketch ❑ Exploratory ❑ Development - Service ❑ 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: 12/21/2009 Oil ❑� - Gas ❑ WDSPL ❑ Plugged ❑ 16. Verbal Approval: Date: WINJ ❑ GINJ ❑ WAG ❑ Abandoned ❑ Commission Representative: GSTOR ❑ SPLUG ❑ 17. 1 hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Mark Sauve Printed Name Mark Sauve Title Production Engineer Signature rF `' Phone Date a!7 564 -4660 12/15/2009 Prepared by Gary Preble 564 -4944 COMMISSION USE ONLY Conditions of approval: Notify Commission so that a representative may witness Sundry Number: Plug Integrity ❑ BOP Test ❑ Mechanical Integrity Test ❑ Location Clearance ❑ Other: Subsequent Form Required: APPROVED BY Approved by: 6 , MMISSIONER THE COMMISSION Date: n ♦, 'a NAL Form 10 -403 Revised 07/2009 o S NS21 202 -218 PERF ATTACHMENT Sw Name Operation Date Perf Operation Code Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base NS21 6/14/04 PER 22,184. 22,264. 11,097.04 11,174.33 NS21 1/15/05 APF 22,164. 22,184. 11,077.72 11,097.04 NS21 7/31/05 APF 22,144. 22,164. 11,058.42 11,077.72 NS21 11/1/05 BPS 22,225. 22,268. 11,136.65 11,178.19 NS21 11/22/09 BPP 22,225. 22,268. 11,136.65 11,178.19 AB ABANDONED PER PERF APF ADD PERF RPF REPERF • BPP BRIDGE PLUG PULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL T SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • PERFORATING PROCEDURE Ver 4.0 06/04/01 sum Well: NS21 API #: 50-029-23126-00 ............................................................. ............... ............................... Date: 12/11/09 Prod Engr Mark Sauve Office Ph: 564-4660 2S Level: ............................................................... ........................................... ......................... ............................... .......... Home Ph: 336-6128 0 ppm .......... * .......... Cell: 748-2865 ........................................................ CC or AFC: NSFLDWL21 Detail Code: .......... TD . .....................-..."" ........... .......................... ...................... .................... I ...................................................................... Description: Drift to with Durnmv Gun, Perforate ............ ............ . ................................................................................................ WBL Entries IOR Type Work Description 200 S I Drift to TD with 2-7/8" Dummy Gun 200 E I Perforate 22,140'— 22,260' MD Well Objectives and Logging Notes: For the a detailed NS21 well history, please see Re-pert program currently on the WBL. The objective of the slickline portion of this procedure is to evaluate the extent of any restriction that might exist due to scale. The proposed perforations are an attempt to increase production by re-perforating 120' of the existing perforations. Please note that the perforations will be dependent on the drift information. Please contact Mark Sauve with any questions, comments, or concerns - 564-4660 (w); 748-2865 (c); 336-6128 (h). Reference Log Tie in Log Add 0 feet Log: GR/CCL Log GR/CCL Log to the tie -in 1 - be on Date: 7/2/2005 7/2/2005 depth with the reference log. Pbi Company: ............ Depths (from-to) Depths (from-to) Feet SPF Orient. Phasing Zone Ad/Re/lperf 22,140' - 22,260' 22,140' - 22,260' 120' 6 60' 0 Ivishak RePerf ................................ ............. I I ......... .............................. ............................... ................ ............... ...... .............. ................... .................................. .................................................... . ............................... .............. I .............. .............................. .............................. ................ .................... .......................... ................... .. ............... ..................................................................... ........................... I .... . ............................. .............................. . ........ I ...................... ................ .................... .......................... ................... 0 .... .................................................................................. ................................ - ............................. .............................. . ............................... ................ I ............ .......................... .... I .............. 0 ....................................................................................... ........................... . .... I .............. ......... .............................. ........................... ................ .1..........I....... ........................ ................... 0 ....................................................................................... Gas Jetting Expected? No At what Depth? N/A ........................ .................. Requested Gun Size: 2.875 Charge: 2906 PJ .............. ........... "" **"* "*'*'*'*" Desired Penetration: 25.3 Entry Hole Diam: 0.38 ...................................... ............................ Is Drawdown Necessary/Desired/Unnecessary During Perforating N.A ........................................... I ..................................................................................................................... Describe below how to achieve drawdown (check wl Pad Operator to see if necessary piping is installed) (e.g. N2 Lift, Hardline Lift Gas, Gas Lift, Flow Well, Backllow Through Drain or Hardline) Tie in to Jewelry @ MD Tie in using: PDS GR/CCL Jewelry log dated 7/2/05 .............. ........................... ........ . .............................. ............................................................................ Minimum ID: in Min ID Type: XN Nip ............. @ 21,755 'MD WLEG Depth: ft MD Casing Size: .......... 4 . . : .p . 12.6# 13-CR Liner Est Res. Pres. @ 22,245 MD -11100' SS 5,047 psi .......................... ................. ............................ Last Tag: 22,213 It ELMD on 11/22/2009 3.5" Bailer .............................. ..' ........................ Well: NS21 Perforation Summary Date: API #: 50-029-23126-00 On-Site Prod Engr: ............................. ........................................... I ............ ......................... I.- ............................. PBTD . .......................... . .............................. General Comments: ............................ I .............. ............... I ................................................................................................................................................................... ............................................................................ .............................................................................................................. I ........................................................................................................... Depths Balance Referenced to BHCS Feet SPF Orient. Phasing Zone Aperf/Reperf O/B/L1 .................. ........... ..... I ........................ .............................. r ................ .................... I ......................... ....................................................................................... 0 O/B/U O/B/U O/B/U O/B/U .............................. .... ..................... ............................... ................ ........... I ........ .......................... 0 ....................................................................................... TREE= ABB- VGI5 -1/8" 5KSI WELLHEAD = ABB -VGI 13 -5/8" MULTIB 5KSI N S 21 SA TES: ***4 CHROME TBG & LNR * ** ACTUATOR= T BAKER KB. ELEV = 56.19' BF. ELEV = 40.1' (CB 15.9') KOP = 100' 988' 4 -1/2" TRM-4E SSSV w/4-1/2"X PROF, ID = 3.812" Max Angle = 71° @ 4233' Datum MD = 21624' Datum TV D = 10500' SS 13 -3/8" CSG, 68 #, L -80 BTC, ID = 12.415" 4606' GAS LIFT MANDRELS STI MD I TV I DEV I TYPE I VLV I LATCHI PORT I DATE 2 18138 44951 69 1 SMOR I DMY I BK 1 0 04/25/04 Minimum ID = 3.725" @ 21755 1 13718 6482 69 SMOR DMY BK 0 04/25/04 4 -1/2" HES XN NIPPLE TOP OF 7" LNR I 19949' 19949 9 -5/8" X 7" BKR ZXP LNR TOP PKR, ID = ?" 9 -5/8" CSG, 47 #, L -80 BTM-C, ID = 8.681" 20205' 21674 14-1/2" FIBER OPTIC TRANSDUCER, ID = 3.958" (21703' ELM D) 21699 4 -1/2" HES X N ID = 3.$13" 21721' 7" X 4 -1/2" BKR S -3 HYD PKR ID = 3.875" 21744' 4 -112" HES X N IP, ID = 3. "� 21755 4 -1/2" HES XN NIP, ID = 3.725" (21784' ELM D) TOP OF 4 -1/2" LNR 21765 21765' 7" X 5" BKR HRD ZXP LTP, ID = 6.20" r _ 01 1/2" TBG, 12.6 #, 13CR -80 VAM -ACIE 21769' 21769 4 -1/2" HES WLEG, ID= 3.85" 52 bpf, ID = 3.958" 217$7' 7" X5" BKR FLEX LOCK HGR, ID= 6.20" - ._.. °. ° -.° 21797 5" X 4 -112" XO, ID = 3 7" LNR, 26 #, L -80 HYDRIL 521, 21945' .0383 bpf, ID = 6.276" PERFORATION SUMMARY REF LOG: PDC LONG ON 06/01/04 ANGLE AT TOP PERF: 15'@22144' Note: Refer to Production DB for historical pert data SIZE SPF INTERVAL (MD) Opn /Sqz DATE 2 -7/8" 6 22144- 22164 O 07/31/05 2 -7/8" 6 22164 - 22184 O 01/15/05 2 -7/8" 6 22184- 22264 O 06/14/04 22225` 3.68" WFRD WRP PLUG (11/01/05) ?? FISH, CENTRALIZERARM F P — BT — D - 1 22257' 4 -1/2" LNR, 12.6 #, 13CR -80 VAM -ACE, 22259' .015 bpf, ID = 3.958" DATE REV BY COMMENTS DATE REV BY COMMENTS NORTHSTAR 11/20/02 N33E INITIAL DRILL 07/06/08 WRR/PJC DRAWING CORRECTIONS WELL: NS21 04/25/04 N33E ORIGINAL COMPLETION PERMIT No: 2022180 11/01/05 RMH/PJC SET IBP @ 22101 Ail No: 50- 029 - 23126 -00 02/14/06 RAC/PAG WRP CORRECTION (11/01/05) SEC 11, T13N, R13E, 1249' FSL & 646' FEL 11/27/07 1 WRR/PJC WELLHD/ LOC CORRECTIONS 06/29/08 1 WRR/PJCj DRAWING CORRECTIONS BP Exploration (Alaska) • BP Exploration (Alaska) Inc. Attn: Well Integrity Coordinator, PRB-20 Post Office Box 196612 Anchorage, Alaska 99519-6612 • M~~' z~r May 26, 2009 1~~ ail ~ 9~1~~ $~;~'li~~ion her Mr. Tom Maunder v Alaska Oil and Gas Conservation Commission y 333 West 7t" Avenue s ~~ Anchorage, Alaska 99501 ~ .- ~--~ Subject: Corrosion Inhibitor Treatments of Northstar Dear Mr. Maunder, Enclosed please find a spreadsheet with a list of wells from Northstar that were treated with corrosion inhibitor in the surface casing by conductor annulus. The corrosion inhibitor is engineered to prevent water from entering the annular space and causing external corrosion that could result in a surface casing leak to atmosphere. The attached spreadsheet represents the well name, top of cement depth prior to filling and volumes of corrosion inhibitor used in each conductor. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of form 10-404, Report of Sundry Operations. If you require any additional information, please contact me or my alternate, Anna Dube, at 659-5102. Sincerely, ~ "~ Andrea Hughes BPXA, Well Integrity Coordinator 11, • i BP Exploration (Alaska) Inc. Surface Casing by Conductor Annulus Cement, Corrosion inhibitor, Sealant Top-off Report of Sundry Operations (10-404) ~~ '`~\ Date Northstar 5/26/2009 Well Name PTD # Initial top of cement Vol. of cement um ed Final top of cement Cement top off date Corrosion inhibitor Corrosion inhibitor/ sealant date ft bbls ft na al NS05 2050090 1.7 na 1.7 na 10 4/30/2009 NS06 2021010 0.5 na 0.5 na 1.7 4/30/2009 NS07 2020770 1.1 na 1.1 na 5.3 4/30/2009 NS08 2020210 0.75 na 0.75 na 3.6 4/30/2009 NS09 2012190 1.2 na 1.2 na 3.4 4/30/2009 NS10 2001820 0.25 na 0.25 na 3 4/30/2009 NS11 2060360 0.75 na 0.75 na 5.1 5/1/2009 NS12 2021100 1.2 na 1.2 na 3.2 5/1/2009 NS13 2010860 1.7 na 1.7 na 6.8 5/1/2009 NS14 A 2052020 0.9 na 0.9 na 2.8 5/1/2009 NS16 2061410 1.3 na 1.3 na 5.8 5/1/2009 NS17 2021690 1.2 na 1.2 na 2.6 5/1/2009 NS18 2021410 1.5 na 1.5 na 7.3 5/1/2009 NS19 2022070 1.5 na 1.5 na 10.2 5/2/2009 NS20 2021880 1.4 na 1.4 na 8.5 5/2/2009 NS21 2022180 1.7 na 1.7 na 4.3 5/2/2009 NS22 2022230 1.6 na 1.6 na 10.2 5!2/2009 NS23 2030500 0.75 na 0.75 na 3 5/2/2009 NS24 2021640 0.75 na 0.75 na 2.6 5/2/2009 NS25 2031660 na * na 2.6 5/2/2009 NS27 2010270 0.6 na 0.6 na 1 5/3/2009 NS28 2050160 1.5 na 1.5 na 8.1 5/3/2009 NS30 2052070 0 na 0 na 4.3 5/3/2009 NS32 2031580 * na * na 1.7 5/3/2009 NS34 2080170 0 na 0 na 2.2 5/3/2009 *Not measured due to rig proximity. L JUN 0 1 2009 • • =- ~_ ~~ -.~ ~,; ,__: -_ .~ MICROFILMED 03/01/2008 DO NOT PLACE ANY NEW MATERIAL UNDER THLS PAGE F:\LaserFiche\CvrPgs_Inserts\Microfilm Marker.doc . . Date 09-11-2007 Transmittal Number:92902 bp BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the PDC at 564-4091. /J Log Top SW Name Date Contractor Run Depth Bottom Depth Loq Type NS21 04-22-2007 PDS 1 0 22205 CORRELATION LOG STATIC TEMPERATURE / NS21 04-22-2007 PDS 1 0 22205 PRESSURE SURVEY NS21 04-22-2007 PDS - - - CORRELATION LOG CD ROM ŒJ}¡ ~ aj"t$t«C.ßw."kMo Please Sign and Return one copy of this transmittal. Thank You, Andy Farmer Petrotechnical Data Center Attn: Doug Chromanski Ignacio Herrera Howard Okland Kristin Dirks Cheryl Ploegstra MMS Murphy Exploration AOGCC DNR BPXA (no CD rom) SGANNED SEP 1 3 2007 dOd -8¡-8 #" 15"'-// ~ ""'"\(\1 reo '\ " L\JU, :::n_~ .J,....; Petro technical Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 ~ - -- ----------- - - BP Exploration {Alaska} Inc. NS-21 North Star North Slope Surface - Before RIH Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 61.86 2817.05 0.5 59.17 2818.92 1.0 56.84 2819.76 1.5 55.51 2820.73 2.0 53.93 2821.53 2.5 53.12 2822.19 3.0 52.48 2822.75 3.5 51.89 2823.26 4.0 51.74 2823.72 4.5 51.19 2824.15 5.0 50.31 2824.55 5.5 50.42 2824.95 6.0 50.48 2825.32 6.5 49.82 2825.68 7.0 49.62 2826.04 7.5 49.65 2826.38 8.0 49.50 2826.73 8.5 49.52 2827.06 9.0 49.06 2827.38 9.5 49.07 2827.70 10.0 48.95 2827.83 AVERAGE 52.10 2823.98 Date: April 2007 Start time: 12:52:00 Temperature Data 80 70 ------------ ---- --------- --- --- ---- --- --- --- 60 --- ---- --- ---- ------- - ---- I.L. t 50 c 40 - u__Uu_ ------- - -- -- ---- ---- --- --- --- ---- 30 ------- -------- ---- ---- --- ---- ------- 20 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 3800 3600 ------------ --- ---- --- --_ __ ________ ------- Current Wellhead Readings Wellhead Pressure (psig) : 2,800 Wellhead Temperature (deg. F.) : N/A Inner Annulus Pressure (psi g) : 1,100 Outer Annulus Pressure (psig) : 120 3400 S en 0. 3200 3000 2800 0 -- ----- ---- --- --- ---- --- --- ---- -------- ------ -- -- - --- ---- --- --- --- --------- --- ---- ------- -------- ---- --- ---- -------- --- -------- ----------- 2 3 456 Minutes 7 8 9 10 Page 1 ------------------- BP Exploration (Alaska) Inc. NS-21 North Star North Slope 3-013' TVDss MD =4,204' Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 145.75 3471.34 0.5 145.79 3471.82 1.0 145.85 3472.30 1.5 145.92 3472.78 2.0 145.92 3473.26 2.5 145.88 3473.74 3.0 145.85 3474.22 3.5 145.83 3474.70 4.0 145.82 3475.19 4.5 145.79 3475.67 5.0 145.78 3476.14 5.5 145.80 3476.62 6.0 145.73 3477.09 6.5 145.69 3477.57 7.0 145.71 3478.05 7.5 145.68 3478.52 8.0 145.66 3478.99 8.5 145.64 3479.46 9.0 145.61 3479.94 9.5 145.55 3480.41 10.0 145.55 3480.88 AVERAGE 145.75 3476.13 Date: April 22, 2007 Start time: 20: 18:00 Temperature Data 260 240 --------- -----_ ___________ ____ _________ ____ _ _ __ _ 220 --- - - --- -- ____ ___ ------- - ------ - - I.L. dI 200 ~ 180 ------ - ------- ---- -- ---------- - - --------- -- - - ------------ - - ---- - 160 ---- -- - ---- - ----------------- - -------- - 140 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 5300 5050 4800 4550 ~ 4300 t.\. - ---- -- - ------- ------ -- - ---- -- --- - --- - - ------- ---- ------------ - ---- ---- - - ---- -- ------- - -- - ------ -- -------- -------- ------ - - ---- ---- ------- - - -- - - --- ------ 4050 3800 3550 n___ __ 3300 o - ---- ---- - ---- ------------ - ------ - - ------ -- - ---- ---- ---- - ---- ---- - - -- -- -------------- --------- -------- 2 3 456 Minutes 7 8 9 10 Page 2 ---------......------- BP Exploration (Alaska) Inc. NS-21 North Star North Slope 5,0141 TVDss MD =9,818' Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 171.99 3659.77 0.5 172.00 3660.29 1.0 172.01 3660.80 1.5 172.02 3661.29 2.0 172.04 3661.76 2.5 172.04 3662.24 3.0 172.05 3662.72 3.5 172.01 3663.20 4.0 172.02 3663.68 4.5 171.98 3664.16 5.0 171.98 3664.63 5.5 171.96 3665.10 6.0 171.93 3665.58 6.5 171.91 3666.06 7.0 171.93 3666.54 7.5 171.91 3667.01 8.0 171.86 3667.49 8.5 171.87 3667.96 9.0 171.87 3668.43 9.5 171.84 3668.90 10.0 171.80 3669.38 AVERAGE 171.95 3664.62 Date: April 2007 Start time: 19:24:00 Temperature Data 260 240 -- ----- -- ----- -- __ _____ - --- - -- --------- 220 -- -- -- -- --- - --- - ---------- 1.1. ÖI 200 ~ -------- ---------- - --- - -- ------- 180 - -- --- ----- --___ ----- ----- ----- ----- ------- -- -- 160 --- ----- -- - 140 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 5300 5050 4800 4550 ~ 4300 Q., ----- ----- ---------- - - ----- --- -- -------- ----- -- -------- - ------- - -- ----- ------------ - ------ - -- --- - --- - ----- - --- -- ----- - ----- ----- 4050 - -- - -- 3800 -------- ----- ----------------- - -------------- ---- ----------- ----- -- -- - - 3550 ----- ------ ----- -- 3300 o 2 3 4 5 6 Minutes 7 8 9 10 Page 3 ----------------- - BP Exploration {Alaska} Inc. NS-21 North Star North Slope 7,015' TVDss MD =: 15,358' Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psi a) 0.0 206.28 3978.24 0.5 206.27 3978.67 1.0 206.27 3979.14 1.5 206.26 3979.58 2.0 206.24 3980.00 2.5 206.24 3980.44 3.0 206.22 3980.88 3.5 206.21 3981.33 4.0 206.20 3981.77 4.5 206.18 3982.20 5.0 206.17 3982.64 5.5 206.16 3983.09 6.0 206.14 3983.53 6.5 206.13 3983.97 7.0 206.13 3984.41 7.5 206.12 3984.85 8.0 206.10 3985.30 8.5 206.09 3985.76 9.0 206.09 3986.21 9.5 206.08 3986.66 10.0 206.07 3987.15 AVERAGE 206.17 3982.66 Date: April 22, 2007 Start time: 18:30:00 Temperature Data 260 240 -- - ---- -------- - - -- - ------ ------ - - -------- - 220 U _U_h _ ---------- !.L. ~ 200 c - -------- --- - -------- - - -------- - ---------- - 180 - - - - - _ h - - - -- ---- - - ---- - - --- ------ - 160 ------ ------------- --- -- 140 o 2 3 4 5 Minutes 6 7 8 9 10 ------- - - ---- - - - --------- - - -------- Pressure Data 5300 5050 4800 4550 ~ 4300 0.. ------- -------- -- --- ------ -------- ---------- ------- - - ------------- ------ - -- --- - ---- ------- - ---------- - - ----------- ------ - - -- --- ------ --- 4050 3800 3550 ----- --------------------- --- ---- ----- -------- ------ - - ------ - --- -- - - ---- ------ ------------------- - ------------ - ------ - ------ - - -- - -------- - - ----- 3300 o 2 3 456 Minutes 7 8 9 10 Page 4 ------------- ----- BP Exploration {Alaska} Inc. NS-21 North Star North Slope 8,030' TVDss MD = 19,926' Static Temperature/Pressure Survey PR:OACTh/E' DiA.GNÖ-STk SERVicES Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 228.70 4423.86 0.5 228.71 4424.15 1.0 228.73 4424.52 1.5 228.74 4424.88 2.0 228.75 4425.24 2.5 228.77 4425.62 3.0 228.77 4426.02 3.5 228.78 4426.42 4.0 228.79 4426.83 4.5 228.79 4427.25 5.0 228.80 4427.67 5.5 228.79 4428.08 6.0 228.79 4428.51 6.5 228.79 4428.94 7.0 228.80 4429.36 7.5 228.80 4429.78 8.0 228.80 4430.21 8.5 228.79 4430.63 9.0 228.79 4431.06 9.5 228.78 4431 .49 10.0 228.78 4431.92 AVERAGE 226.77 4427.73 Date: April 22, 2007 Start time: 17:43:00 Temperature Data 260 240 - -- --- - --- ----_______ __ __ _ ______ ________________ 220 _h __ h____ __ -------- - ----- I.L. ~ 200 c -- -- -- - 180 ----- ------ ----- -- __ _____ _____ _ ___ _ 160 - -- --------- -------------- ------ 140 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 5300 5050 ----- -- -- ----- -------------- -------- - 4800 - __h __ _hh ----- -- -- --------- - ----- ---- 4550 ~ 4300 0. --- -- ----- ----- - -- ----- - --- ----- ----------- ----- --- - -- -- -- -- -- ------ ----- - -- --- 4050 -- __h__h ___h_ --------------- ----- -------------- 3800 -------- -- ----- -____ __ __ __________ 3550 3300 o ------ -- -------------- - ----- 2 3 456 Minutes 7 8 9 10 Page 5 ------------------- BP Exploration {Alaska} Inc. NS-21 North Star North Slope 10,615' TVDss MD = 21,743' Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 241 .46 4925.13 0.5 241 .4 7 4925.05 1.0 241 .4 7 4924.96 1.5 241.47 4924.99 2.0 241.47 4925.04 2.5 241.47 4925.10 3.0 241 .46 4925.09 3.5 241.46 4925.13 4.0 241 .4 7 4925.16 4.5 241.46 4925.18 5.0 241 .45 4925.20 5.5 241.46 4925.21 6.0 241 .45 4925.16 6.5 241.45 4925.14 7.0 241 .45 4925.11 7.5 241 .44 4925.07 8.0 241 .43 4924.99 8.5 241 .43 4924.94 9.0 241 .43 4924.86 9.5 241 .42 4924.85 10.0 241 .42 4924.83 10.5 241 .42 4924.82 11.0 241 .41 4924.84 11.5 241.41 4924.81 12.0 241.41 4924.78 12.5 241 .40 4924.80 13.0 241 .40 4924.77 13.5 241 .40 4924.76 14.0 241.39 4924.77 14.5 241 .40 4924.75 15.0 241.39 4924.74 AVERAGE 241 .44 4924.97 Date: April 2007 Start time: 17:08:00 Temperature Data 260 240 220 - ---- I.!. ê! 200 ~ 180 -------------- - ---- ---- -- 160 -------------------------------- ------------------------- 140 0112233445566778899101011111212131314141515 Minutes Pressure Data 5300 5050 -------------------------------------------------------- - ~oo ---------------------------------------------------------- 4550 ::$ en 4300 - Q. -- - -------------------- - ----- ----- ---- ---- - --- - 4050 -- -- -- -- - 3800 ---------------------------------------------------------- 3550 ---------------------------------------------------------- 3300 o 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 101011 111212131314141515 Minutes Page 6 -------------- - - -.. BP Exploration {Alaska} Inc. NS-21 North Star North Slope 10,889' TVDss MD = 22,028' Static Temperature/Pressure Survey Elapsed Time Temperature PressurE! (Minutes) (Deg. F) (psia) 0.0 244.90 5020.41 0.5 244.90 5020.42 1.0 244.89 5020.38 1.5 244.88 5020.37 2.0 244.88 5020.35 2.5 244.88 5020.37 3.0 244.87 5020.40 3.5 244.86 5020.43 4.0 244.86 5020.41 4.5 244.86 5020.41 5.0 244.86 5020.41 5.5 244.86 5020.41 6.0 244.85 5020.39 6.5 244.85 5020.40 7.0 244.85 5020.40 7.5 244.86 5020.41 8.0 244.85 5020.44 8.5 244.85 5020.44 9.0 244.85 5020.47 9.5 244.84 5020.48 10.0 244.85 5020.48 AVERAGE 244.86 5020.41 Date: April 22, 2007 Start time: 16:51 :00 Temperature Data 260 240 220 -- -- --- - -------------------- - I.L. Ô'I 200 ~ 180 -------- - ----- -------------------- -------- ----- ------------------- 160 - ------------------ --------------- 140 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 5300 5050 4800 ---- ------------------------- --- ----------- 4550 - ~ 4300 0. - ----------------------------------- - ---- ----- -- ---------------------- 4050 ------ - -------------------------------- - - -- 3800 ------------------------ --- ---------------- 3550 ---------------------------------- - - ---- ----------- 3300 o 2 3 456 Minutes 7 8 9 10 Page 7 ---------- -------- BP Exploration (Alaska) Inc. NS-21 North Star North Slope 10,989' TVDss MD = 130' Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 246.45 5062.18 0.5 246.44 5061.98 1.0 246.43 5061.93 1.5 246.43 5061.99 2.0 246.43 5062.01 2.5 246.41 5062.02 3.0 246.41 5062.01 3.5 246.40 5062.01 4.0 246.40 5062.02 4.5 246.39 5062.03 5.0 246.41 5062.04 5.5 246.40 5062.02 6.0 246.40 5062.06 6.5 246.39 5062.04 7.0 246.39 5062.05 7.5 246.39 5062.04 8.0 246.39 5062.06 8.5 246.39 5062.04 9.0 246.38 5062.05 9.5 246.39 5062.05 10.0 246.38 5062.06 AVERAGE 246.40 5062.03 Date: April 22, 2007 Start time: 16:25:00 Temperature Data 260 240 - ---- - ------- -------- - ------ ------ 220 _____u_ h_ ------- ------ ------ - I.L. 5f 200 c ------ ------- ------ ------ 180 ------ ------ - ------ ------- -------- 160 - ----- ------ ------ ------ 140 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 5300 5050 4800 4550 ~ 4300 CI.. - ------ ------- ------ - -------- -------- ----- -------- ------ ------- - ----- --- -------- ------- ------ --- ------ ------ ------ - 4050 3800 3550 3300 o ------ -------- - ------ ------ ------ ------ - ------ ------ ------ - ------------ ------ - ---- - - ------- ------ - ----- ------ ---- - 2 3 456 Minutes 7 8 9 10 Page 8 ----------- ------- BP Exploration {Alaska} Inc. NS-21 North Star North Slope 11,1051 TVDss MD = 22,2D5' Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psia) 0.0 249.21 5088.87 0.5 249.19 5088.93 1.0 249.18 5088.96 1.5 249.19 5088.97 2.0 249.22 5089.02 2.5 249.23 5089.04 3.0 249.25 5089.07 3.5 249.24 5089.09 4.0 249.25 5089.12 4.5 249.26 5089.14 5.0 249.26 5089.16 5.5 249.26 5089.18 6.0 249.25 5089.19 6.5 249.26 5089.23 7.0 249.25 5089.26 7.5 249.26 5089.28 8.0 249.26 5089.30 8.5 249.26 5089.32 9.0 249.26 5089.34 9.5 249.25 5089.37 10.0 249.26 5089.38 10.5 249.25 5089.41 11.0 249.26 5089.43 11.5 249.25 5089.44 12.0 249.26 5089.47 12.5 249.25 5089.4 7 13.0 249.26 5089.51 13.5 249.26 5089.52 14.0 249.26 5089.54 14.5 249.25 5089.56 15.0 249.25 5089.57 AVERAGE 249.25 5089.26 Date: April 22, 2007 Start time: 16:07:00 Temperature Data 260 2~ ---- ------ --- ----- ---- ---------- 220 ---- ----------- I.L. . 200 l 180 ------ ----- ----- ---- - ----- ----- ------ ---- ----- 160 ------------ ------ --- ----- ----- ----- ------- 1~ 0112233445566778899101011111212131314141515 Minutes Pressure Data 5300 5050 4800 --- n_n_n___ ----- ----- ------ 4550 - ------ ---------------- ~ 4300 - ____n_____ t:i. ----------------- ------ ----- ---- ----- 4050 3800 3550 - ---- ----- ----- ------ ----- ----------- ------- ---- ---- ----- ---- ----- ----- 3300 o 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 101011 111212131314141515 Minutes Page 9 ------ ------------ BP Exploration {Alaska} Inc. NS-21 North Star North Slope Surface - After POOH Static Temperature/Pressure Survey Elapsed Time Temperature Pressure (Minutes) (Deg. F) (psi a) 0.0 42.46 3183.36 0.5 42.65 3184.04 1.0 42.28 3184.73 1.5 41.82 3185.41 2.0 41.74 3186.08 2.5 41.51 3186.73 3.0 41.27 3187.37 3.5 40.99 3187.98 4.0 41.07 3188.56 4.5 41.04 3189.13 5.0 40.71 3189.67 5.5 40.79 3190.19 6.0 40.56 3190.69 6.5 41.08 3191.17 7.0 40.40 3191.63 7.5 40.29 3192.08 8.0 40.54 3192.52 8.5 40.28 3192.94 9.0 40.23 3193.31 9.5 40.16 3193.64 10.0 40.13 3193.88 AVERAGE 41.05 3189.29 Date: April 2007 Start time: 21: 13:00 Temperature Data 80 70 - -- n --------------- -- - - - ------------ - ----- 60 - ------------- --------------- - ---------- I.L. dJ 50 ~ ------------- ------------- - ------------ 40 nnn__ 30 ------------------ ----------- 20 o 2 3 4 5 Minutes 6 7 8 9 10 Pressure Data 3800 3600 --- ----------------- ------- -------- --- 3400 ---------------- --------------- --- -- -------- Curre Wellhead Pressure (psig) : Wellhead Temperature (deg. F.) : Inner Annulus Pressure (psi g) : Outer Annulus Pressure (psi ) : ::s ifJ Q. 3200 - 3,157 N/A 1,100 120 3000 n___ - ----------------- --------------- - - -- 2800 o 2 345 Minutes 6 7 8 9 10 Page 1 0 - - ---------------- BP Exploration {Alaska} Inc. NS-21 North Star North Slope Downhole Temp/Press Static Temperature/Pressure Survey Date: April 22, 2007 Start time: 12:52:00 End time: 21 :24:00 Temperature Data 260 220 --- --------- ---- ---- -- ------- ------ --- --- -------- 180 -- ----- ------------- --------- -- ---- ------- --- - ------ I.L. t 140 100 -------- ------ --------- ---- -- - ------- -------- ---- --- - -------- -------- -------- --- ---- ---- -------- --- ---- 60 - -- - --- -- ---- ---- --------- -- - ------- ---- -- 20 -10 o 10 20 30 40 50 60 70 80 90 100 110 120 Minutes 4800 ----- -------------- - ------- ---- ---- --- --- ----- ------ --- ---- Pressure Data 5300 4300 ---- ---------- -- -------- ---- -- --- ---- ---- - - -- ---- ----- <C ¡¡; 3800 -- ---- u_ Q. --------- -------- --- --------- ---- -- - ------- 3300 --- ---- ----- --- ---- ---- --- --- ---- ---- -------- -------- ------- --------- 2800 - -- -- -- ---- --- --- --------- ----- --- --- - --- --- -------- ---- --- -------- 2300 -10 Lubricator 4204' o 10 20 9816' 15358' 19 926' 21 743' 22 027' 22 130' 30 40 50 60 70 80 Minutes Page 11 22 205' Lubricator 90 100 110 120 e e bp Date 08-14-2007 Transmittal Number:92897 :-0 Z001 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the PDC at 564-4091. ~o Log Top SW Name Date Contractor Run Depth Bottom Depth Loa Type u:tc... -/15a NS10 07-21-2007 SCH 1 4800 7975 WATERFLOW INJECTION :t(!. 0"3-,,,4< NS32 07 -20-2007 SCH 1 3760 8075 WATERFLOW INJECTION 9-dò'7- NS19 07-08-2007 SCH 1 13650 13955 PERFORATION RECORD ~o3C.. NS11 07 -06-2007 SCH 1 14450 14625 PERFORATION RECORD ;1- ()$ç(_ NS13 07 -14-2007 SCH 1 11 534 11 790 MEMORY PPROF - (d... NS24 07 -1 5-2007 SCH 1 11774 12476 STATIC BOTTOM HOLE , ~ -~:>3 NS22 07 -09-2007 SCH 1 12600 12850 PERFORATION RECORD - -ó81 NS08 12-23-2005 PDS 1 9006 11406 CORRELATION LOG Od ..-a 18 NS21 07 -02-2005 PDS 1 21590 22249 DEPTH DETERMINATION 't:~ -/~c9 NS10 01-01-2006 PDS 1 4497 5497 CORRELATION LOG 8¢0 () g ~ö ìð&J ]( JJ2a=J }od ;:) (,) 7(JO c,J~ Please Sign and Return one copy of this transmittal. Thank You, Andy Farmer Petrotechnical Data Center 5t;ANNED AUG 1 72007 Attn: Doug Chromanski Ignacio Herrera Howard Okland Kristin Dirks Cheryl Ploegstra MMS Murphy Exploration AOGCC DNR BPXA Petrotechnica1 Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 :. '" f ~ . STATE OF ALASKA .02p~O? ALA Oil AND GAS CONSERVATION COM~ON REPORT OF SUNDRY WELL OPERATIONS § ,.....""L-I _ 10- -"\;, FEB 1 4 2007 Alaska Oil & Gas Cons. Commission 1. Operations Abandon D RepairWell D Plug Perforations D Stimulate [2] Other D Performed: Alter Casing D Pull Tubing D Perforate New Pool D WaiverD Time Extension D Change Approved Program D Operat. Shutdown D Perforate D Re-enter Suspended Well D 2. Operator BP Exploration (Alaska), Inc. 4. Current Well Class: 5. Permit to Drill Number: Name: Development P Exploratory 202-2180 I 3. Address: P.O. Box 196612 Stratigraphic Service 6. API Number: Anchorage, AK 99519-6612 50-029-23126-00-00 I 7. KB Elevation (ft): 9. Well Name and Number: 56.19 KB I NS21 I 8. Property Designation: ADLO-312798 I 10. Field/Pool(s): NORTHSTAR Fieldl NORTHSTAR OIL Pool j 11. Present Well Condition Summary: Total Depth measured 22261 feet Plugs (measured) 22101 true vertical 11171.43 feet Junk (measured) 22260 Effective Depth measured 22258 feet true vertical 11168.54 feet Casing Length Size MD TVD Burst Collapse Surface 4562 13-3/8" 68# L-80 44 - 4606 44 - 3207.45 4930- - . 2270 Production 20107 9-5/8" 47# L-80 43 - 20150 43 - 9259.66 6870 4760 Liner 1996 7" 26# L -80 19949 - 21945 9103.37 - 10866.51 7240 5410 Liner 496 4-1/2" 12.6# 13Cr80 21765 - 22261 10691.98 - 11171.43 8430 7500 Perforation depth: Measured depth: 22184 - 22264 22184 - 22225 itANNEO fEE 2 1 2007 True Vertical depth: 11097.04 - 11174.33 11097.04 - 11136.65 - - Tubing: (size, grade, and measured depth) 4-1/2" 12.6# 13Cr80 41 - 21766 Packers and SSSV (type and measured depth) 4-1/2" TRM-4E SSV 988 7" Liner Top Packer 19949 7" Baker 13CrBO Packer 21721 4-1/2" Liner Top Packer 21765 12. Stimulation or cement squeeze summary: -c- Intervals treated (measured): Treatment descriptions including volumes used and final pressure: RRí1M~ 8Ft. FEB .2 ! 2DOí T 11/0 2870/1110/140 WHP=550/660/20 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing pressure Prior to well operation: 3302 14835 3366 0 767 Subsequent to operation: 3527 16242 3939 0 823 14. Attachments: 15. Well Class after croposed work: Copies of Logs and Surveys Run Exploratory Development P Service Daily Report of Well Operations X 16. Well Status after proposed work: Oil p' Gas r WAG r GINJ r WINJ WDSPl 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. ISUndry Number or NIA if C.O. Exempt: 306-414 Contact Robert Younger PREPARED BY GARY PREBLE 564-4944 Printed Name Robert Younger Title Production Engineer Signature ~ Phone 564-5392 Date 2/14/2007 C/ Form 10-404 Revised 04/2006 ~":)-(g\ Submit Original Only " . . NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY 2/1/2007 Treatment - Job Prep - Heat seawater & load uprights, load diesel, rig up hard line. to 2-2-07 WSR*** 2/2/2007 ***Continued from 2-1-07 WSR*** 11 Ó/140 Acid Treatment - Pumped tbg pickle per procedure. 15 bbls 90:10 DAD acid (12% HCL) (10% Xylene), 258 bbls 95*F seawater & 63 bbls diesel. Reduce pump rate to minimum for last 15 bbls diesel. Secure well, over to op's for 1 hr soak followed by flow back. Acid Treatment - Pumped following treatment per procedure. 50 bbls 70*F 12% HCL acid, 134 bbls 80*F filtered 2% kcl overflush (5' radial displacement), 274 bbls 95*F seawater displacement & 63 bbls 80*F diesel displacement/under-balance. well over to op's for clean up followed by 2-6 hr tests. Final *** Job FLUIDS PUMPED BBLS 134 FILTERED 2% KCL 274 SEAWATER 63 DIESEL 50 12% HCL ACID 521 TOTAL 0.5% A261 CORROSION INHIBITOR 4 PPT A 179 CORROSION INHIBITOR 8 PPT A153 CORROSION INHIBITOR 0.5% W060 ANTI-SLUDGE 0.5% W54 NON-EMULSIFIER 0.2% F103 SURFACTANT 20 PPT L581RON CONTROL . . SARAH PALIN, GOVERNOR AI~SIiA. OIL A.lQ) GAS CONSBRVATION COMMISSION 333 W 7th AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Robert Younger Production Engineer BP Exploration (Alaska) Inc. PO Box 196612 Anchorage, AK 99519-6612 Re: Northstar Field, Northstar Oil Pool, NS21&CANNED JAN 0 8 2007 Sundry Number: 306-414 Dear Mr. Younger: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. Sincerely, ~\,!..~~~. j; / -. ~/ (¿....~.;! I.·.~///'¿/./~~· .,/ i !. / / ~/- '. i /1 - V//í. . . - - ' Dan T. Seamount Commissioner DATED thi6day of January, 2007 Encl. aDd-..&Lß 1. Type of Request: . STATE OF ALASKA ctr 1,;~f)1_ ALA OIL AND GAS CONSERVATION COMMI~ APPLICATION FOR SUNDRY APPROVAL 20 AAC 25.280 Operational shutdown Plug Perforations 0 Perforate New Pool 0 4. Current Well Class: Suspend Repair well 0 Pull Tubing 0 Perforate Waiver Stimulate 0 'rime Extension 0 Re-enter Suspended Well 0 5. Permit to Drill Number: I~ ~ECEfVED !I-." EC 2 8 ¿UL) Alaska Oil & t Ê'¡ Anchorage Abandon Alter casing 0 Change approved program 0 2. Operator Name: BP Exploration (Alaska), Inc. 3. Address: P.O. Box 196612 Anchorage, AK 99519-6612 7. KB Elevation (ft): Developm ent ø ~ Stratigraphic 0 Exploratory 0 Service 0 202-2180 6. API Number: 50-029-23126-00-00 9. Well Name and Number: 56.19 KB NS21 '. 8. Property Designation: ( ADL-312798 11. Total Depth MD (ft): 22261 Total Depth TVD (ft): 11171.43 10. Field/Pools(s): Northstar Field / Northstar Oil Pool PRESENT WELL CONDITION SUMMARY Effective Depth MD (ft): Effective Depth TVD (ft): 22268 11178.19 Plugs (measured): Junk (measured): Jul-60 22260 Burst Collapse 3207 4930 2270 9260 6870 4760 10867 7240 5410 11171 8430 7500 Casing Length Size MD TVD Surface 4562 13-3/8" 68# L-80 44 4606 44 Production 20107 9-5/8" 47# L-80 43 2015043 Liner 1996 7" 26# L -80 19949 219459103.37 Liner 496 4-1/2" 12.6# 13Cr80 21765 22261 10691.98 Perforation Depth MD (ft): 22144 - 22264 Closed Perforation Depth TVD (ft): 11058.42 - 11174.33 Closed Tubing Size: 4-1/2" 12.6# Tubing Grade: 13Cr80 Tubing MD (ft): 41 - 21766 Packers and SSSV Type: 4-1/2" TRM-4E SSV 7" Liner Top Packer 7" Baker 13Cr80 Packer 4-1/2" Liner Top Packer 12. Attachments: Descriptive Sum mary of Proposal ø Detailed Operations Program 0 BOP Sketch 0 14. Estimated Date for Packers and SSSV MD (ft): 988 19949 21721 21765 Date: 13. Well Class after proposed work: Exploratory 0 Developm ent ø 15. Well Status after proposed work: Oil ø Gas 0 Plugged 0 WAG 0 GINJ 0 WINJ 0 Service 0 Commencing Operations: 16. Verbal Approval: Commission Representative: 1/5/2007 Abandoned 0 WDSPL 0 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Printed Name Title Contact Prepared by Gary Preble 564-4944 Robert Youn er Signature Production En ineer Phone 564-5392 Date COMMISSION USE ONLY 12/22/2006 Conditions of approval: Notify Commission so that a representative may witness Sundry Number: Plug Integrity 0 BOP Test 0 Mechanical Integrity Test 0 Location Clearance 0 Other: Subsequent Form Required: ~ a\,...\ COMMISSIONER APPROVED BY THE COMMISSION Date: Form 10-403 Revised 7/2005 ¡RIGlr~AL 8F: Submit in Duplicate No portion of the belo.ork should be performed w/out fi~aking time to ensure No Accident 0 harm to People, and No damag"'the Environment To: Jerry Bixby/Clark Olsen - Well Operations Supervisor December 15, 2006 From: Robert Younger/Carolyn Kirchner - Northstar Production Engineer Subject: NS21 Bullhead Acid Treatment AFE NSFLDWL21 Est. Cost: $100 M Est. lOR: 680 BOPD Please perform an acid stimulation on NS21 per the below procedure including a pickle and fullbore acid/scale inhibition treatment: Type lOR PR N DSWL AFE Job Description F 680 NS21 NSFLDWL21 Pump Acid Treatment & Scale Inhibition Treatment (SIT) Current Status: Producer Last Test: 10/07/06: BOPD: 3,094, BWPD: 3,223; MMCFPD: 16.73 Max Inclination: 71.5° at 4,233' md; 16° at Perfs Max Dog Leg: 4.2 deg/100' at 2,338' md Minimum ID: 3.725" @ 21,755' md, 4.5" XN Nipple Last TD tag: 07/19/05 : Tagged TD 22,151 ' wlm Last Downhole Op: 11/11/05: Slickline Fishing Job: POOH with parted wire and fishing tool string. Swap out slickline spools. Latest H2S value: None anticipated Three months following the January 2005 adperfs NS21 declined at a rate of 90%. The formation of CaC03 scale in the new perforations that have never been inhibited was strongly suspected. Therefore, a combination acid/scale inhibitor treatment was completed in April 2005. Following the July acid/scale inhibition treatment additional adpefs were shot and an attempted cement dump bail was executed in July 2005. A WRP was then set in November 2005 (followed by a fishing job due to parted slickline). The water-shut off attempts did not curtail water production. The proposed acid treatment is an attempt to remove any scale that may have formed in NS21 since its last treatment, April 5, 2006, and historical analysis of formation water indicates formation of CaC03 scale is likely. Procedure Pre-job planning is essential to the successful delivery of this procedure due to the simultaneous operations and logistical issues associated with working on the Northstar Island. Cleanliness of trucks, tanks, pumps, etc. is critical to avoid possible formation damage. 1. Mobilize pumps, tanks and acid transport to Northstar. 2. Order out volume of seawater and diesel to flush both the pickle and the acid job. See attached Volumes table. No portion of the belo.ork should be performed w/out fi. aking time to ensure No Accident 0 harm to People, and No damag the Environment 3. RU pumping equipment. 4. Hold PJSM. Possible hazards on this job include bringing partially spent acid back to surface when the pickle is produced back. 5. Preheat seawater and diesel to 80°F. The heating of these displacement fluids will eliminate the need to hold backside pressure on the wells during treatment. 6. PT Dowell surface lines to 5000 psi Pickle 7. Pump the following fluids to pickle the production tubing at 3 - 4 bpm, 3500 psi max pressure. After about 321 bbls have been pumped into tubing, slow pumping rate to minimum pump rate around 0.25 bpm. Allow pickle to soak for 1 hour. a) 15 Bbls DAD acid b) 258 Bbls seawater c) 63 Bbls diesel 90:10 DAD Acid (12% HCL) to contain: 0.6% A261 Corrosion Inhibitor 4 ppt A 179 Corrosion Inhibitor 8 ppt A 153 Corrosion Inhibitor 0.5% W54 Non-Emulsifier 0.2% F103 Surfactant 20 ppt L58 Iron Control 0.5% W60 Anti-sludge 8. After soaking, produce pickle back to test separator and well clean up tank. The pickle volume to flowback is 336 Bbls. Acid Treatment 9. Pump the following treatment at maximum rate or 3500 psi max pressure. When the acid first hits perfs, slow pump rate to 1 BPM for 1h of acid volume then resume pumping at maximum rate. a) 50 bbls Acid b) 134 bbls 2% filtered KCI (Overflush for 5' radial displacement) c) 274 bbls Seawater (for displacement) d) 63 bbls Diesel (for displacement and under-balance) Acid Description: 12% Acid to contain: 0.5% A261 Corrosion Inhibitor 4 ppt A 179 Corrosion Inhibitor 8 ppt A 153 Corrosion Inhibitor No portion of the belo.ork should be performed w/out fi.taking time to ensure No Accident 0 harm to People, and No damag the Environment 0.5% W060 Anti-Sludge 0.5% W54 Non-Emulsifier 0.2% F103 Surfactant 20 ppt L58 Iron Control Note: Acid strength to be verified and documented via titration before leaving Schlumberger. Please note the acid titrations on the WSR and have results available on location. 10. RD Schlumberger. FLOWBACK PROCEDURE: 11. Following the treatment, line-up the well to flow into the test separator and well cleanup tank for flowback. Produce clean-up volume of 521 bbls. After clean- up, divert back to the plant and get 2 6-hour tests. Note: Please have Schlumberger send a digital copy of the post job report (including a digital, ASCII or EXCEL, copy of the pumping rates and pressures) to Robert. Y ounger@ bp.com. Procedure Contacts: Robert Younger WK: 564-5392 HM: 677-2599 Cell: 830-4920 t 1 J ù.c'^1 DATA SUBMITTAL COMPLIANCE REPORT 6/26/2006 Permit to Drill 2022180 Well Name/No. NORTHSTAR UNIT NS-21 Operator SP EXPLORATION (ALASKA) INC MD 22261,-- TVD 11078 .......- Completion Date 6/13/2004 ---- Completion Status 1-01L Current Status 1-01L REQUIRED INFORMATION Mud Log Yes Samples No DATA INFORMATION Types Electric or Other Logs Run: GR, DIR, GYRO, PWD, RES, NEU, DEN Well Log Information: JpuL f V IJ.ú ~.~ API No. 50-029-23126-00-00 UIC N -~ Directional surv~ -~ (data taken from Logs Portion of Master Well Data Maint Log/ Electr Data Digital Dataset Typ~ Med/Frmt Number Name ..Æ> D Directional Survey .,.ßPt- Report: Final Well R ~ C Tf 12514 Report: Final Well R ~ Directional Survey ~ Directional Survey ~ D Directional Survey ..ßPt Directional Survey ~ C ..;pf- J.... \ ~ 12827 Gamma Ray ~ 12827 Gamr"d Kay ~ ~ C bJ~ 12935 ~r~w.·-~ ~g 12935 Neutron fI'\ '0 ...rbg 12935 Indu ction/Resistivity "''' 1:(;g 12935 Induction/Resistivity TV» LOg 12935 Neutron iV''> ~D Asc Directional Survey Directional Survey Log Log Run Interval OHI Scale Media No Start Stop CH 1 0 4621_ Open 4179 22261 Open Slu 5 Slu 0 22275 0 22275 0 22261 0 22261 0 22244 0 22244 200 22200 200 22200 330 22261 330 22261 200 22200 25 Slu 25 25 25 Slu Slu Slu o o 22261 Open 9/21/2005 22261 Open 9/21/2005 . Received 12/2/2002 5/11/2004 Includes MD & TVD Color 'c;...,.....ÜJlùtJ I.)~" AÌ f'Ilo t/hl...... ~.1 5/11/2004 Digital form o{ F,inal well I Report J' CMJ ~c..1 M V'I \. "'"'1-5 7/16/2004 7/16/2004 11/12/2004 11/12/2004 1/24/2005 1/24/2005 1/24/2005 1/24/2005 1/24/2005 Comments PDC JEWELRY LOG GAMMA RAY/CCLlDSN 12827 PDC JEWELRY LOG GAMMA RAY/CCLlDSN 12827 LDWG/GRlARC, DCR, GRAPHIC IMAGES VISION DENSITY NEUTRON, VISION RESISTIVITY VISION RESISTIVITY VISION DENSITY NEUTRON, MWD Sag Corrected MWD Sag Corrected . DATA SUBMITTAL COMPLIANCE REPORT 6/26/2006 Permit to Drill 2022180 Well NamelNo. NORTHSTAR UNIT NS-21 MD 22261 TVD 11078 Completion Date 6/13/2004 L~ Perforation ~ Perforation ~ Perforation Well Cores/Samples Information: Name Interval Start Stop ADDITIONAL INFORM1{ION Well Cored? Y IN) Chips Received? ~ Analysis Received? ~ Comments: Compliance Reviewed By: _ ~ Operator BP EXPLORATION (ALASKA) INC API No. 50-029-23126-00-00 Completion Status 1-01L Current Status 1-01L UIC N 5 Slu 22050 22242 Case 1 0/28/2005 Perforating Record 2.88" HSD 6spf PJ-2906 HMX Guns 13 & 14 June 2004 5 Slu 21950 22200 Case 10/28/2005 Perforating Record 2.88" HSD 6spf PJ-2906 HMX Guns 15 Jan 2005 5 Slu 22050 22225 Case 3/16/2006 Perforation Record w/GR 2.88" HSD 6SPF 60 Deg . Phased PJ2906 Sample Set Sent Received Number Comments Daily History Received? ~ Œ:JN Formation Tops . Date: ;'7 J,,-- ~ b " It\, . STATE OF ALASKA . ALA Oil AND GAS CONSERVATION COM JON REPORT OF SUNDRY WELL OPERATIONS D D D Plug Perforations Perforate New Pool Perforate 4. Current Well Class: Development ~¡ Stratigraphic Stimulate [] Other D Waiver D Time Extension D Re-enter Suspended Well D 5. Permit to Drill Number: 1. Operations Abandon D Repair Well D Performed: Alter Casing D Pull Tubing D Change Approved Program D Operat. Shutdown D 2. Operator BP Exploration (Alaska), Inc. Name: 3. Address: 202-2180 6. API Number: 50-029-23126-00-00 9. Well Name and Number: Exploratory Service P.O. Box 196612 Anchorage, AK 99519-6612 7. KB Elevation (ft): 56.19 KB NS21 ADL-312798 11. Present Well Condition Summary: 10. Field/Pool(s): NORTHSTAR Field/ NORTHSTAR OIL Pool 8. Property Designation: Total Depth measured 22261 feet Plugs (measured) 22225 true vertical 11171.43 feet Junk (measured) 22258 Effective Depth measured 22258 feet true vertical 11168.54 feet Casing Length Size MD TVD Burst Collapse Surface 4562 13-3/8" 68# L-80 44 - 4606 44 - 3207.45 4930 2270 Production 20107 9-5/8" 47# L-80 43 - 20150 43 - 9259.66 6870 4760 Liner 1996 7" 26# L-80 19949 - 21945 9103.37 - 10866.51 7240 5410 Liner 496 4-1/2" 12.6# 13Cr80 21765 - 22261 10691.98 -11171.43 8430 7500 Perforation depth: Measured depth: 22144 - 22164 22164 - 22184 22184 - 22264 True Vertical depth: 11058.42 - 11077.72 11077.72 - 11097.04 11097.04 - 11174.33 Tubing: (size, grade, and measured depth) 4-1/2" 12.6# 13Cr80 41 - 21766 Packers and SSSV (type and measured depth) 4-1/2" TRM-4E SSV 7" Liner Top Packer 7" Baker 13Cr80 Packer 4-1/2" Liner Top Packer 988 19949 21721 21765 12. Stimulation or cement squeeze summary: Intervals treated (measured): RBDMS BFl MAY :3 0 2006 Treatment descriptions including volumes used and final pressure: see attached fluid summary Final TIO = 700/720/14 13. Prior to well operation: Subsequent to operation: 14. Attachments: Copies of Logs and Surveys Run Daily Report of Well Operations Oil-Bbl 3443 4865 Representative Daily Average Production or Injection Data Gas-Mcf Water-Bbl Casing Pressure 9797 3208 20 13971 4690 14 15. Well Class after proposed work: Exploratory Development ~: 16. Well Status after proposed work: Oil ~ Gas D WAG Tubing pressure 757 700 Service x 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. GINJ WINJ WDSPL SUndry Number or N/A if C.O. Exempt: 306-062 D Contact Sharmaine Vestal Prioled ",me Sh'~"Oe Ve'lal. " I Signa~~ ~~-t Form 10-404 Revised 04/2004 0 RIG I N A L Title Data Mgmt Engr Phone 564-4424 Date 5/15/2006 Submit Original Only , ... tf ... . . NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY ACTIVITYDA TE I SQ.I;fV'IMÄR\¥ 4/5/2006 ***Continued from Previous Days WSR*** T/I/O= 1600/820/20 Assist SLB Pump Crew (Acid Treatment) - Pumped 1 04bbls warm diesel for pickle, 1 04bbls warm diesel for acid treatment. FWHP's = 700/720/14 4/5/2006 Acid Treatment. Pumped treatment as per program. Well tender to leave shut in 4 hours before flowing. FLUIDS PUMPED BBLS 208 Diesel 62 12% acid 91 2% KCL 447 Seawater 808 TOTAL . . Date: 03-15-2006 Transmittal Number:92763 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the PDC at 564-4091 SW Name Date Contractor Log Run Top Depth Bottom Depth Log Type VISION SERVICE LWD MD NS05PB1 02-25-2005 SCH 200 11991 COMPOSITE VISION SERVICE LWD TVD NS05PB1 02-25-2005 SCH 200 11991 COMPOSITE NS14 01-07 -2006 SCH 1 9900 10300 BRIDGE PLUG SET RECORD NS24 03-26-2005 SCH 12150 12478 MEM PSP PPROF NS10 12-26-2005 SCH 4800 8025 CHEMICAL CUTTER RECORD NS14 12-22-2005 SCH 11500 11867 CHEMICAL CUTTER RECORD NS08 10-26-2005 SCH 11130 11915 CHEMICAL CUTTER RECORD NS19 09-26-2005 SCH 1 13700 13990 PERFORATION RECORD NS27 06-06-2005 SCH 10950 11300 PERFORATION RECORD NS31 06-05-2005 SCH 1 10950 11320 PERFORATION RECORD NS24 09-22-2005 SCH 1 11800 12470 PERFORATION RECORD NS25 10-03-2005 SCH 1 18750 19200 PERFORATION RECORD ;t()~.. ~I~ NS21 07 -31-2005 SCH 1 22050 22225 PERFORATION RECORD NS08 12-16-2005 SCH 1 9500 11244 PERFORATION RECORD NS05 09-19-2005 SCH 1 13210 14002 PERFORATION RECORD NS06 09-17 -2005 SCH 1 13040 13825 PERFORATION RECORD NS18 12-08-2005 SCH 1 16200 16834 PERFORATION RECORD NS17 07 -29-2005 SCH 1 17850 18200 PERFORATION RECORD Petrotechnical Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 ~.(J ^~~( i F'II¿ . . BPXA WELL DATA TRANSMITTAL {Jill Please Sign and Return one copy of this transmittal. Thank You, Andy Farmer Petrotechnical Data Center Attn: Cheryl Ploegstra Howard Okland Tim Ryherd Doug Chromanski Ignacio Herrera Petro technical Data Center LR2-] 900 E. Benson Blvd. PO Box] 96612 Anchorage, AK 99519-6612 Date: 03-15-2006 Transmittal Number:92763 . ~@ IT'fÆi1 Ti ~ lID' Un ' ;.~'. -" ~) I ¡ .' if Lb' ! I t-' . ~ '~ . n i flL' ;j :I-.,..¡¡ FRANK H. MURKOWSKI, GOVERNOR A"iA~1iA OIL AlQ) GAS CONSERVATION COMMISSION 333 W. 7'" AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Robert Younger Production Engineer BP Exploration (Alaska), Inc. PO Box 196612 Anchorage, AK 99519-6612 Re: Northstar Field, NS21 Sundry Number: 306-062 Dear Mr. Younger: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. Sincerely, DATED this~ay of February, 2006 Enc!. bp . . ,\tt41. -....~~ ,,~...- ~..- ~..-- *~ -F..... "J'_'- BP Exploration (Alaska) Inc. 900 East Benson Boulevard P. O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 February 15, 2006 Winton Aubert Alaska Oil & Gas Conservation Commission 333 West ih Avenue Suite 100 Anchorage, AK 99501 Dear Winton: RECEIVE FEB 17 2006 Alaska Oil & Gas Cons. Anchorage Re: Sundry Notice for NS21 to Acidize (Ivishak) BP Exploration Alaska, Inc. proposes to acidize the NS21 well. This well has exhibited a decline and historical analysis of formation water indicates the /. formation of CaC03 scale is likely. NS21 responded well to the acid treatment completed in May 2005. The procedure includes the following major steps: · Pickle the tubing · Bullhead HCI based acid treatment · Flowback Sincerely, Robert Younger Production Engineer BPXA, ACT, Northstar f r, I c;p¡. .:J) ~ (p ,0 w,<í II- ~ 2.-1 t", I 2A t'J (p .A. STATE OF ALASKA ~ . ~ RECEIVED A~ OIL AND GAS CONSERVATION COMMI N :i?- APPLICATION FOR SUNDRY APPROVAL ~ FEB 172006 20 AAC 25.280 -cr- Operational shutdown U Perforate U Ala_8iL& Gas Cons.!~,rrlmbsjon Plug Perforations 0 Stimulate 0 Time Extension 0 Anchorage Perforate New Pool 0 Re-enter Suspended Wen 0 4. Current Well Class: /" 5. Permit to Drill Number: Development e Exploratory 0 202-2180 / Stratigraphic 0 10. FieldlPools(s): Northstar Field / Northstar Oil Pool PRESENT WELL CONDmON SUMMARY IEffective Depth MD (ft): IEffective Depth TVD (ft): 22268 /,11178.19 Size MD TVD Abandon U Alter casing 0 Change approved program 0 2. Operator Name: Suspend U Repair well 0 pun Tubing 0 1. Type of Request: BP Exploration (Alaska), Inc. 3. Address: P.O. Box 196612 Anchorage, AK 99519-6612 7. KB Elevation (ft): 56.19 KB 8. Property Designation: ADL-312798 11. Total Depth MD (ft): 22261 Casing Surface Production Liner Liner ITotal Depth TVD (ft): 11171.43 Length 4562 20107 1996 496 13-3/8" 68# L-80 9-5/8" 47# L-80 7' 26# L -80 4-1/2" 12.6# 13Cr80 Perforation Depth MD (ft): Perforation Depth TVD (ft): 22144-22264 / 11058.42-11174.33 Closed below 22,225' MD Closed below 11136.65 44 43 19949 21765 9. Wen Name and Number: 4606 44 20150 43 21945 9103.37 22261 10691.98 Service o 6. API Number: ,/ 50-029-23126-00-00 NS21 ~ IPlugs (measured): Jul-60 Burst IJUnk (measured): 22260 Collapse 2270 4760 5410 7500 3207 4930 9260 6870 10867 7240 11171 8430 Tubing Size: Tubing Grade: 4-1/2' 12.6# / 13Cr80 Tubing MD (ft): 41 - 21766 Packers and SSSV Type: 4·1/2" TRM-4E SSV 7" Liner Top Packer 7" Baker 13CrSO Packer 4-1/2' Liner Top Packer 12. Attachments: Descriotive Summary of Proposal e Detailed Operations Program 0 BOP Sketch 0 14. Estimated Date for Commencing Operations: 16. Verbal Approval: Commission Representative: 3/312006 Date: Packers and SSSV MD (ft): 988 19949 21721 21765 / 13. Well Class after proposed work: Exploratory 0 Developm ent e / Service 0 15. Wen Status after proposed work: Oil e Gas 0 Plugged 0 Abandoned 0 WAG 0 GINJ 0 WINJ 0 WDSPL 0 Prepared by Sharmaine Vestal 564-4424 Robert Younger 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Printed Name Ro~~ounger ________ Title Production Engineer Signature ~~ Phone 564-5392 Date /' - COMMISSION USE ONLY Conditions of approval: Notify Commission so that a representative may witness Plug Integrity 0 BOP Test 0 Mechanical Integrity Test 0 Location Clearance 0 Other: Approved by: Form 10-403 Revised 7/2005 2/17/2006 SUndry Number: 30,"- O(P~ RBDMS BFt FES 2 3 2006 APPROVED BY COMMISSIONER THE COMMISSION UR'G\NAL E Date: "J, r- z,1".".() Submit in Duplicate TREE = WEllÆAD= ACTUATOR = KB. B..EV = BE ELEV = '~ . ,- <-- . Max Angle = Datum M) = Datum TVD = ABB-VGl5-118" stA ABB-VG/13-5f8"' M.l..1ÐOVVl. ~ 56' 40.1' (CB 15.9') @ 10500' SS 13-3.IS"CSG,68#.L-80BlC,D=12.415" H 4606' J--4 Minimum ID =3.725" @ 21755' 4-112" XN NIPPLE TOPOF7"'Ufl H 19949' I ~ S-5Æ"CSG,47#.l-80BlM-C,D=8.681" H 20150' ~ TOPOF4-1I2"UflH 21765' 14-112" TBG. 1~6#. 13CRVAM-ACE H 21766' -0152bpf,D-3.958"' I . [7"' Ufl. 26#,:-80 HYDRL 521, H 21945' I----- .0383 bpf. D-6276" I ÆRFORA TON SlJM\4o\RY REF lOG: P£X.: lONG ON 06101104 ANGlE AT TOP PERF: ?? @ 22144' Note: Refer to R"oduction œ for historical perf data INITIAL PERF - 0iARGE: POWERJET..ux. P.l2906 HSD P8£TRA1DN: 27"', HOlE 0.36", PHA.SE: 60 DEG. SIZE SPF NnRV AL (aID) 0pnISqz OA. TE 2-718" 6 22144 - 22164 C 07131105 2-718' 6 22164 - 22184 C 01/15f05 2-7/8" 6 22184-22264 C 06114104 F8lD H l4-112" lm.. 1~.6#,1~RVAM-ACE H .0152 bpf. D - 3.958 I 22268" 22261' DATE 11120/02 04/25104 06121#04 0811&04 01/15105 07/31/05 REV BY COM'ÆNTS INllAL DRILL ORIGINAL COMPLETION ENF ADPERF ENF FISH GJBIPJC ADPERF RM-WJC ADPERF NS21 . L z ~ A NOTES: ***4-112- aROIIETBG& LNR"** 988" H4-112" TRM-4E SSSV w /4-112" X PROFLE, D = 3.812" I 10. GAS lFT MANJRELS ST aID TVD DE.V TYÆ VlV LATa- PORT OA.TE 2 8138 4495 1 13718 6482 g .. I ??1 H4-112" FBfROPnClRANSDUCER. D=3.958" , I 21703" ELM H4-112" FBER 0PnC lRANSDUCER. D = 3.958" 21699' H4-112" X NP, D = 3.813" I 21721' H7"' X 4-112" A<R, D=???? 21744' H4-1I2"XNP.D=3.813" , 21755' H4-112" XNNP, D=3.725'" I 21766' H4-112" WlEG, D= 3.85'" I HELMDlTNOTLOGGED? , ... 22225" H3_68'WfRDWRPRUG(11J01105) 'ZZ¡,Zloo' I ??? HASH. CENTRAllZfRARM I OA. TE REV BY COM'ÆNTS 1007105 ffi.H N:W FORMA. T & TVD CORRECT 11101105 RM-WJC SET BP@ 22101 02114/00 RAaPAG WRPCORRE.CTKJN(11J01105) NORTHSTAR WB.l: NS21 ÆRMT No: 'æ22180 API No: 50-029-23126-00 see TNRE BP Exploration (Alaska) 1. Operations Abandon D Repair Well D Performed: Alter Casing D Pull Tubing D Change Approved Program D Operat. Shutdown D 2. Operator BP Exploration (Alaska), Inc. Name: . STATE OF ALASKA .. ALASØ'OIL AND GAS CONSERVATION COMM~N REPORT OF SUNDRY WELL OPERATIONS o StimulateD ~,,~~ e1 (;>. -,,;, -~ .... D WaiverD Time Extension D Anchorage o Re-enter Suspended Well D 5. Permit to Drill Number: REC·J=t\!~O DEll (3 7005 '-~~;1t~!Or 3. Address: Plug Perforations Perforate New Pool Perforate 4. Current Well Class: Development R1 Stratigraphic D 202-2180 6. API Number: 50-029-23126-00-00 9. Well Name and Number: Exploratory Service P.O. Box 196612 Anchorage, AK 99519-6612 7. KB Elevation (ft): 56.19 KB NS21 8. Property Designation: ADL-312798 11. Present Well Condition Summary: 10. Field/Pool(s): Northstar Field/ Northstar Oil Pool Total Depth measured 22261 feet Plugs (measured) 22101 true vertical 11171.43 feet Junk (measured) 22258 Effective Depth measured 22258 feet true vertical 11168.54 feet Casing Length Size MD TVD Burst Collapse Surface 4562 13-3/8" 68# L-80 44 - 4606 44 - 3207.45 4930 2270 Intermediate 20107 9-5/8" 47# L-80 43 - 20150 43 - 9259.66 6870 4760 Production 1996 7" 26# L-80 19949 - 21945 9103.37 - 10866.51 7240 5410 Liner 496 4-1/2" 12.6# 13Cr80 21765 - 22261 10691.98 -11171.43 8430 7500 Perforation depth: Measured depth: 22144 - 22264 Closed True Vertical depth: 11058.42 - 11174.33 Closed Tubing: (size, grade, and measured depth) 4-1/2" 12.6# 13Cr80 41-21766 Packers and SSSV (type and measured depth) 4-1/2" TRM-4E SSV 7" Liner Top Packer 7" Baker 13Cr80 Packer 4-1/2" Liner Top Packer 988 19949 21721 21765 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: 13. Prior to well operation: Subsequent to operation: 14. Attachments: Copies of Logs and Surveys Run Daily Report of Well Operations Oil-Bbl 4437 4288 Representative Daily Average Production or Injection Data Gas-Mcf Water-Bbl Casing Pressure 8685 3217 0 10645 3525 0 15. Well Class after proposed work: Exploratory Development R1 16. Well Status after proposed work: Oil R1¡ Gas D WAG Tubing pressure 2400 755 Service x Contact Sharmaine Vestal RBDMS BFL DEC 1 9 2005 GINJ WINJ WDSPL SUndry Number or N/A if C.O. Exempt: 305-156 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Printed Name Shar~aine Vestal ~ ~ Title Data Mgmt Engr Signat~~~ Phone 564-4424 h-·' ! ¡ , f\ I A 1 Form 10-404 Revised 04/2004 "..,-: "'! ,J : 1 ." , _ Date 12/12/2005 Submit Original Only ... . . i NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY I~'!(~~"F.~!F I 07/31/05 Perforated 22144'-22164' With 2.88" HSD 6 SPF 60 Deg Phased PJ 2906 Charges. Used GR/CCL to correlate to SLB jewelry PDC log date 01-June-04. All shots fired. Loaded well with seawater prior to rih due to pressure restrictions with 0.39" cable. 11/11/2005 Continued from 11/10/05 WSR. POOH with parted wire and fishing tool string. Swap out slickline spools. RIH to fish original tools. Latch and flow well while holding 2000 Ib pull on wire to get tools moving up hole. Shut well in and POOH. Recovered original toolstring and Halliburton setting tool. Tools indicate good set on Weatherford WRP plug. RD and turn well over to tender to pop. Prep to move to NS-18. (Halliburton running tool record; BHP 5080 psi, BHT 242 degrees) *** Job Complete*** 11/12/2005 T/I/0=800/1400/0 (Well Fowing) OA Injectivity Test (OA Fluid Swap Program) - Pumped total of 15 bbls 80* diesel down OA. OAP increased to 1500 psi @ 1.5 bpm 5 bbls away, 1750 psi @ 4 bpm for 10 bbls. Bled OAP to o all fluid (3 bbls) Final WHP=800/1400/0 11/12/2005 Assist S-line (Fishing Job) (Well Flowing) - Pump 288 bbls 95* left over seawater to production through flow cross. *** Job Complete*** FLUIDS PUMPED BBLS 2 1 3 Meth Diesel TOTAL . STATE OF ALASKA _ RECEIVED ALAS'Ø'OIL AND GAS CONSERVATION COMM~N DEC 1 6 Z005 REPORT OF SUNDRY WELL OPERATIONS . ., AII,ski Clil & r:A~. 8. Commission 1. Operations Abandon 0 Repair Well 0 Plug Perforations 0 Stimulate 0-· .... Otrier Performed: AlterCasing 0 Pull Tubing 0 Perforate New Pool 0 WaiverD Time ExtM Ai Change Approved Program 0 Operat. Shutdown 0 Perforate 0 Re-enter Suspended Well 0 2. Operator BP Exploration (Alaska), Inc. 4. Current Well Class: 5. Permit to Drill Number: Name: Development R1 Exploratory 202-1880 3. Address: P.O. Box 196612 Stratigraphic D Service 0 6. API Number: Anchorage, AK 99519-6612 50-029-23118-00-00 7. KB Elevation (ft): 9. Well Name and Number: .~ 55.3 KB 8. Property Designation: ADL-312799 11. Present Well Condition Summary: Total Depth measured 18531 true vertical 11112.93 Effective Depth measured 18526 true vertical 11108.79 NS20 10. Field/Pool(s): Northstar Field/ Northstar Oil Pool feet feet Plugs (measured) Junk (measured) None None feet feet Surface Production Liner Liner Length Size MD TVD Burst Collapse 4107 13-3/8" 68# L-80 43 - 4150 43 - 3233.5 5020 2270 15431 9-5/8" 47# L-80 42 - 15473 42 - 8839.04 6870 4760 2904 7" 26# L-80 15290 - 18194 8735.53 - 10833.94 7240 5410 552 4-1/2" 12.6# 13Cr80 17978 - 18530 10650.59 - 11112.1 8430 7500 Casing Perforation depth: Measured depth: 18450 - 18469 True Vertical depth: 11045.78 -11061.53 11063.19 -11078.94 11079.77 -11095.52 18471 - 18490 18491 - 18510 Tubing: (size, grade, and measured depth) Packers and SSSV (type and measured depth) 12. Stimulation or cement squeeze summary: Intervals treated (measured): 3-1/2" 9.2# 13Cr80 40 - 17983 3-1/2" TRM-4E SSV 7" Liner Top Packer 7" Baker 13Cr80 Packer 4-1/2" Liner Top Packer 1005 15290 17934 17978 Treatment descriptions including volumes used and final pressure: Representative Daily Average Production or Injection Data Gas-Met Water-Bbl Casing Pressure 14076 1288 0 15710 1365 0 15. Well Class after proposed work: Exploratory Development R' 16. Well Status after proposed work: Oil R' Gas WAG 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Printed Name Shar:aine ves. tal , I. . Signatu~~ ORIGINAL 13. Prior to well operation: Subsequent to operation: 14. Attachments: Copies of Logs and Surveys Run Daily Report of Well Operations Oil-Bbl 3554 3959 x Contact Sharmaine Vestal Form 10-404 Revised 04/2004 Tubing pressure 735 741 Service RBDMS BFl DEC GINJ WINJ WDSPL Sundry Number or N/A if C.O. Exempt: 1 t 2005 305-170 Title Data Mgmt Engr Phone 564-4424 Date 12/13/2005 Submit Original Only . . NS20 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY I. A0-~ì'ÎTYDAJ"¡ETI . ·~1Dr~~' 8/13/2005 ****Well Flowing Upon Arrival**** Acid /Scale Inhibitor treatment; pickle wellbore, spear in with 2 bbls meth followed by 7 bbls 12% HCL, displace HCL with 101 bbls 80 deg fsw, 49 bbls 80 deg diesel Produce pickle back to test separator and well clean up tank, flow back vol=157 bbls. Spear in with 2 bbls meth followed by 29 bbls 12% HCL with 10% L66 scale inhibitor, displace with 136 bbls 2%KCL with 10% L66 scale inhibitor - 67 bbls KCL - 115 80 deg fsw - 49 bbls 80 deg diesel. Close companion valve and let HCL soak 4 hrs. Produce well to test separator and clean up tank (395 bbls). Test well post clean-up. FLUIDS PUMPED BBLS 116 SW 98 Diesel 67 2% KCL 7 12% HCL 136 2% KCL w/1 0% L66 12% HCL, 10% L66, .6% A261 , 4% A201 , 4ppt A 179, 8ppt A 153, 50ppt L41 , 29 .5% W54, .2% F103, 20ppt L58 453 TOTAL . . Date: 10-25-2005 Transmittal Number:92705 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. This data is being sent separate because of the confidential nature. If you have any questions, please contact me in the PDC at 564-4091 SW Name Date Contractor Log Run Top Depth Bottom Depth Log Type ~21 01/15/2005 SCH 1 21950 22200 PERFORATING RECORD NS17 08/08/2004 SCH 1 17752 18255 PERFORATING RECORD NS31 02/05/2005 SCH 1 3000 10700 FREE POINT RECORD 0'S21 06/14/2004 SCH 1 22050 22242 PERFORATING RECORD STEP RATE INJECTIVITY NS32 05/15/2004 ,SCH 1 0 8321 TEST WITH RST NS27 07/21/2004 SCH 1 0 11332 INJECTION PROFILE PERFORATION RECORD NS13 01/19/2005 SCH 1 11550 11 858 WITH GAMMA RAY 1/J~"" ".,;:':,' .:j :'~ ~:c' "'''':¿;'.;; Please Sign and Return one copy of this transmittal. Thank You, Andy Farmer Petrotechnical Data Center Attn: Jim Seccombe (BPXA) Attn: Cheryl Ploegstra (BPXA) Attn: Jason Smith (Murphy Exploration) Attn: Howard Okland (AOGCC) Attn: Kristin Dirks (DNR) Attn: Doug Choromanski (MMS) Petrotechnica1 Data Center LR2-l 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 ;Nj;¿ - ~ I f f'/l"L- . . Date: 09-21-2005 Transmittal Number:92674 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. This data supersedes all previously delivered data. Please replace all previously delivered data listed below. If you have any questions, please contact me in the PDC at 564-4091 SW Name Date Contractor Log Run Top Depth Bottom Depth Log Type NS22 07/13/2005 SCH FINAL SURVEY REPORT NS25 07/13/2005 SCH FINAL SURVEY REPORT NS20 07/13/2005 SCH FINAL SURVEY REPORT NS08 07/13/2005 SCH FINAL SURVEY REPORT NS23 07/13/2005 SCH FINAL SURVEY REPORT NS24 07/13/2005 SCH FINAL SURVEY REPORT NS25PB1 07/13/2005 SCH FINAL SURVEY REPORT NS25PB2 07/13/2005 SCH FINAL SURVEY REPORT NS06 07/13/2005 SCH FINAL SURVEY REPORT NS20PB1 07/13/2005 SCH FINAL SURVEY REPORT NS19 07/13/2005 SCH FINAL SURVEY REPORT NS16 07/13/2005 SCH FINAL SURVEY REPORT NS18 07/13/2005 SCH FINAL SURVEY REPORT NS17 07/13/2005 SCH FINAL SURVEY REPORT / NS21 07/13/2005 SCH FINAL SURVEY REPORT NS13 07/13/2005 SCH FINAL SURVEY REPORT NS15 07/13/2005 SCH FINAL SURVEY REPORT NS12 07/13/2005 SCH FINAL SURVEY REPORT NS09 07/13/2005 SCH FINAL SURVEY REPORT Petro technical Data Center LR2- I 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 Å ~À - Îvl ~ . . BPXA WELL DATA TRANSMITTAL NS14 07/13/2005 SCH NS07 07/13/2005 SCH NS27 07/13/2005 SCH Please Sign and Return one copy of this transmittal. Thank You, Andy Farmer Petrotechnical Data Center Ann: Cheryl Ploegstra ACT Data Manager Jim Seccombe BPXA Howard Okland AOGCC Jason Smith Murphy Exploration Tim Ryherd DNR Don Chromanski MMS Terrie Hubble SSD (1 Report) (l Report) (2 Reports + disk) (1 Report + disk) (1 Report + disk) (1 Report + disk) (1 Report) Petrotechnical Data Center LR2- I 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 Date: 09-21-2005 Transmittal Number:92674 FINAL SURVEY REPORT FINAL SURVEY REPORT FINAL SURVEY REPORT . . Date: 09-21-2005 Transmittal Number:92674 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. This data supersedes all previously delivered data. Please replace all previously delivered data listed below. If you have any questions, please contact me in the PDC at 564-4091 SW Name Date Contractor Log Run Top Depth Bottom Depth Log Type NS22 07/13/2005 SCH FINAL SURVEY REPORT NS25 07/13/2005 SCH FINAL SURVEY REPORT 0S2O 07/13/2005 SCH FINAL SURVEY REPORT NS08 07/13/2005 SCH FINAL SURVEY REPORT NS23 07/13/2005 SCH FINAL SURVEY REPORT NS24 07/13/2005 SCH FINAL SURVEY REPORT NS25PB1 07/13/2005 SCH FINAL SURVEY REPORT NS25PB2 07/13/2005 SCH FINAL SURVEY REPORT NS06 07/13/2005 SCH FINAL SURVEY REPORT ~S20PB1 07/13/2005 SCH FINAL SURVEY REPORT NS19 07/13/2005 SCH FINAL SURVEY REPORT NS16 07/13/2005 SCH FINAL SURVEY REPORT NS18 07/13/2005 SCH FINAL SURVEY REPORT NS17 07/13/2005 SCH FINAL SURVEY REPORT NS21 07/13/2005 SCH FINAL SURVEY REPORT NS13 07/13/2005 SCH FINAL SURVEY REPORT NS15 07/13/2005 SCH FINAL SURVEY REPORT NS12 07/13/2005 SCH FINAL SURVEY REPORT NS09 07/13/2005 SCH FINAL SURVEY REPORT Petro technical Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 ~Ù:l.-\ðO . . BPXA WELL DATA TRANSMITTAL NS14 07/13/2005 SCH NS07 07/13/2005 SCH NS27 07/13/2005 SCH Please Sign and Return one copy of this transmittal. Thank You, Andy Farmer Petrotechnical Data Center Attn: Cheryl Ploegstra ACT Data Manager Jim Seccombe BPXA Howard Okland AOGCC Jason Smith Murphy Exploration Tim Ryherd DNR Don Chromanski MMS Terrie Hubble SSD (1 Report) (1 Report) (2 Reports + disk) (1 Report + disk) (1 Report + disk) (1 Report + disk) (1 Report) Petrotechnical Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 Date: 09-21-2005 Transmittal Number:92674 FINAL SURVEY REPORT FINAL SURVEY REPORT FINAL SURVEY REPORT It e ~(.'~. 1r i.. . .IT:. ... ,.7 M~Ù 11, '1)~ j 'U J ¡¡!¡T', , ~ ,L ~ u ,..." U '"" '---'J ,¡.l~n' ! . ~ ,.1 ¡. ~ '.' i II ~ I !J1J f··'j\\ i¡j' L~ FRANK H. MURKOWSKI, GOVERNOR AI,ASIiA OIL AND GAS CONSERVATION COMMISSION 333 W. 7'" AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Michael Francis Sr Petroleum Engineer BP Exploration (Alaska), Inc. PO Box 196612 Anchorage, AK 99519 Re: Northstar Field NS20 Sundry Number: 305-220 .~ Dear Mr. Francis: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. Please provide at least twenty-four (24) hours notice for a representative of the Commission to witness any required test. Contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision Superior Court unless rehearing has been requested. DATED thiS/~y of August, 2005 Encl. 4 bp e - ... ,\I,.,,,, ..'~ ~~. ..s i~. ."'~'\' ". . it BP Exploration (Alaska) Inc. 900 East Benson Boulevard P. O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 August 3, 2005 RECEIVED AUG 0 4 2005 Alaska Oil & Gas Cons. Commission Anchorage Winton Aubert Alaska Oil & Gas Conservation Commission 333 West ¡th Avenue Suite 100 Anchorage, AK 99501 Dear Winton: Re: Sundry Notice for NS20 to Perform an Outer Annulus Down- squeeze BP Exploration Alaska, Inc. proposes to perform an outer annulus (OA) down- squeeze the NS20 well. This well has exhibited inner annulus (IA) by OA communication. The source of this co~unication is believed to be a leaking 9-5/8" casing connection at 1071' MD. This connection had to made-up downhole after a problem during the well construction phase. The intent of the OA down squeeze is to eliminate this leak by sealing across it with cement. / The procedure includes the following major steps: . Establish injectivity down the OA . Fill the OA with cement / Sincerely, 1r~4 &~.t.Q Senior petr~SElngineer BPXA, ACT, Northstar AL . . Oilfield Services, Alaska Schlumberger Drilling & Measurements Schlumberger 2525 Gambell, Suite 400 Anchorage, AK 99503 Tel (907) 273-1766 Fax (907) 561-8367 Tuesday, August 09, 2005 To Whom It May Concern: In response to a request by BP, to look into improving TVD accuracy, it was determined that the wells on the Northstar pad could be further enhanced by applying a SAG correction. This is merely a further analysis of how the MWD tool was oriented in the BHA, and using this information to improve upon the survey. Due to BHA configuration, the MWD tool may 'scag, between two stabilizers. This 'sagging' effect may cause the MWD tool to have an inclination difference in reading that was greater than ± 0.10 inclination, relative to the tool being parallel with the wellbore. Therefore, the survey is further improved on inclination accuracy by adding or subtracting this g> offset to inclination readings on the original survey, and ultimately better TVD accuracy is achieved. ~ 3 tT CD .. CQ CD .. We have examined the list of surveys, and corrected them. NS06 NS07 NS08 NS09 NS12 NS13 NS14 NS15 NS16 NS17 NS18 NS19 NS20PB1 and-NS20 NS21 V NS22 NS23 NS24 NS25PB1, NS25PB2, and NS25 NS27 "tI .. <" I» - CD All other surveys on the Northstar pad not listed here either did not require a SAG correction, had the correction applied while drilling, or have Gyro surveys as definitive. As the accuracy of the survey has improved, these surveys should be used to replace previously defined and distributed surveys, for the list above. For any questions or concerns, you can contact me about these surveys and the procedure to improve them. Regards, C. Scott Delapp DEC Manager / Survey Engineer Schlumberger - Alaska Phone: 907-273-1766 ~ò~-À{8 bp NS21 Survey Report Schlumberger Report Date: June 3, 2005 Survey I DLS Computation Method: Minimum Curvature / Lubinski Client: BP Exploration Aiaska Vertical Section Azimuth: 309.860' Field: Northstar Vertical Section Origin: N 0.000 II, E 0.000 II Structure I Slot: Northstar PF I NS21 TVD Reference Datum: KB Well: NS21 TVD Reference Elevation: 56.19 II reiative to MSL Borehole: NS21 Sea Bed I Ground Level Elevation: 15.57 II relative to MSL UWUAPI#: 500292312600 Magnetic Declination: 25.337' Survey Name I Date: NS21 / June 10,2003 Total Field Strength: 57605.234 n T Tort I AHD I DDII ERD ratio: 221,736' / 17694.78 II / 6.893 / 1.584 MagnetIc Dip: 80.993' . Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet : '" tJeclinationDate: June 04, 2004 Location Lat/Long: N 702928,666, W 148 41 35,919 Mag~etic Declination Model: BGGM 2004 Location Grid N/E Y/X: N 6031021.480 IIUS, E 659827.320 IIUS ' North Reference: True North Grid Convergence Angle: + 1.23169690' Total Corr Mag North -> True North: +25,337' Grid Scale Factor: 0.99992902 Local Coordinates Referenced To: Well Head I Comments Measured I Inclination I Azimuth I Sub-Sea TVD I TVD Vertical I Along Hole I Closure I NS EW I DLS I Northing Easting Latitude Longitude Depth Section Departure (II) (deg) (deg) (II) (It) (II) (II) (II) (ft) (II) (deg/100 II) (IIUS) (IIUS) RTE 0.00 0.00 0.00 -56.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6031021.48 659827.32 N 702928.666 W 1484135.919 First GYD GC SS 50.00 0.58 252.19 -6.19 50.00 0.14 0.25 0.25 -0.08 -0.24 1.16 6031021.40 659827.08 N 702928.665 W 1484135.927 100.00 0.95 260.04 43.80 99.99 0.54 0.92 0.92 -0.23 -0.89 0.77 6031021.23 659826.44 N 702928.663 W 14841 35.946 150.00 1.65 266.51 93.79 149.98 1.33 2.05 2.05 -0.34 -2.02 1.43 6031021.09 659825.31 N 702928.662 W 1484135.979 200.00 1.76 280.58 143.77 199.96 2.52 3.53 3.50 -0.24 -3.49 0.86 6031021.16 659823.84 N 702928.663 W 14841 36.022 250.00 1.97 295.25 193.74 249.93 4.02 5.15 5.03 0.26 -5.02 1.04 6031021.63 659822.29 N 702928.668 W 1484136.067 300.00 2.01 296.85 243.71 299.90 5.71 6.89 6.66 1.03 -6.58 0.14 6031022.36 659820.72 N 70 29 28.676 W 14841 36.113 350.00 2.13 302.86 293.68 349.87 7.49 8.69 8.37 1.93 -8.14 0.50 6031023.23 659819.14 N 702928.685 W 1484136.159 400.00 2.12 308.96 343.65 399.84 9.33 10.54 10.10 3.01 -9.64 0.45 6031024.28 659817.61 N 702928.695 W 1484136.203 450.00 2.24 321.94 393.61 449.80 11.21 12.44 11.80 4.36 -10.97 1.01 6031025.61 659816.26 N 702928.709 W 1484136.242 . 500.00 2.06 334.78 443.58 499.77 12.98 14.31 13.35 5.94 -11.95 1.03 6031027.17 659815.24 N 702928.724 W 1484136.271 550.00 2.88 334.85 493.53 549.72 14.94 1,6.46 15.10 7.89 -12.87 1.64 6031029.10 659814.29 N 702928.743 W 1484136.298 600.00 3.84 335.72 543.44 599.63 17.58 1,9.39 17.61 10.56 -14.09 1.92 6031031.73 659813.01 N 702928.769 W 1484136.334 650.00 4.36 335.23 593.31 649.50 20.81 22.97 20.82 13.81 -15.57 1.04 6031034.95 659811.45 N 702928.801 W 1484136.378 700.00 4.64 336.26 643.16 699.35 24.34 26.89 24.45 17.39 -17.19 0.58 6031038.49 659809.77 N 702928.837 W 14841 36.425 750.00 5.00 336.22 692.98 749.17 28.10 31.09 28.41 21.23 -18.88 0.72 6031042.30 659807.99 N 702928.874 W 1484136.475 840.00 6.50 331.12 782.53 838.72 36.36 40.10 37.19 29.28 -22.92 1.76 6031050.26 659803.78 N 70 29 28.954 W 1484136.594 930.00 8.32 321.74 871.78 927.97 47.48 51.68 48.73 38.86 -29.41 2.42 6031059.69 659797.08 N 7029 29.048 W 1484136.785 1020.00 10.36 319.37 960.58 1016.77 61.84 66.29 63.33 50.11 -38.72 2.31 6031070.75 659787.54 N 70 29 29.158 W 1484137.059 1117.00 13.34 320.19 1055.50 1111.69 81.45 86.20 83.23 65.33 -51.56 3.08 6031085.68 659774.37 N 702929.308 W 14841 37.437 1209.00 14.95 323.95 1144.71 1200.90 103.41 108.68 105.7Ö 83.08 -65.34 2.01 6031103.13 659760.21 N 702929.483 W 1484137.842 Last GYD GC SS 1303.00 16.05 328.09 1235.29 1291.48 127.51 133.79 130.75 103.92 -79.35 1.66 6031123.66 659745.76 N 702929.688 W 14841 38.254 First MWD+IFR+MS 1397.00 19.55 324.65 1324.78 1380.97 155.07 162.51 159.42 127,78 -95.32 3.89 6031147.17 659729.28 N 702929.922 W 1484138.725 SurveyEditor Ver SP 1.0 Bld( doc40x_56 ) NS21\NS21\NS21\NS21 Generated 7/14/2005 9:23 AM Page 1 of 7 À G ¡ -' dv! R Comments Measured , Inclination , Azimuth , Sub-Sea TVD' TVD Vertical , Along HOle, Clo~ure , NS EW , DLS , Northing Easting Latitude Longitude Depth Section Departure ( It) (deg) (deg) (ft) (ft) ( It) (It) ( It) (It) (II) (deg/tOO II) (IIUS) (ftUS) 1489.08 21.81 323.66 1410.92 1467.11 186.58 195.02 191.93 154.13 -114.37 2.48 6031173.10 659709.67 N 702930.181 W 1484139.285 1584.38 23.44 322.67 1498.89 1555.08 222.26 231.68 228.59 183.46 -136.36 1.76 6031201.96 659687.06 N 702930.470 W 1484139.932 1679.94 25.61 320.71 1585.82 1642.01 261.08 271.35 268.23 214.57 -160.97 2.42 6031232.52 659661.79 N 702930.776 W 1484140.656 1773.48 28.14 319.01 1669.25 1725.44 302.72 313.62 310.45 246.87 -188.24 2.83 6031264.23 659633.83 N 702931.093 W 1484141.459 1866.86 31.10 319.97 1750.42 1806.61 348.21 359.77 356.53 281.96 -218.20 3.21 6031298.67 659603.12 N 702931.439 W 1484142.341 1958.74 30.40 320.57 1829.38 1885.57 394.41 406.75 403.49 318.09 -248.23 0.83 6031334.14 659572.33 N 702931.794 W 1484143.225 2054.35 32.91 320.10 1910.76 1966.95 443.75 456.92 453.64 356.71 -280.26 2.64 6031372.05 659539.47 N 702932.174 W 1484144.167 2149.08 35.41 319.56 1989.14 2045.33 496.14 510.11 506.80 397.34 -314.58 2.66 6031411.94 659504.30 N 70 29 32.573 W 1484145.177 2241.71 37.29 316.43 2063.75 2119.94 550.47 565.00 561.58 438.11 -351.33 2.85 6031451.90 659466.68 N 702932.974 W 1484146.259 2337.72 40.99 314.04 2138.21 2194.40 610.80 625.59 621.85 481.08 -394.03 4.16 6031493.95 659423.07 N 70 29 33.397 W 1484147.515 . 2430.93 43.43 314.52 2207.24 2263.43 673.23 688.20 684.12 524.81 -438.86 2.64 6031536.69 659377.32 N 70 29 33.827 W 1484148.835 2523.81 45.70 315.15 2273.41 2329.60 738.15 753.38 749.04 570.76 -485.07 2.49 6031581.64 659330.13 N 702934.279 W 1484150.195 2617.72 48.74 313.91 2337.19 2393.38 806.84 822.29 817.70 619.08 -534.21 3.38 6031628.89 659279.97 N 702934.754 W 1484151.641 2713.32 52.31 314.01 2397.96 2454.15 880.43 896.07 891.20 670.30 -587.32 3.74 6031678.95 659225.77 N 702935.258 W 14841 53.204 2807.17 55.43 312.91 2453.29 2509.48 956.07 971.87 966.69 722.42 -642.34 3.46 6031729.87 659169.65 N 702935.770 W 14841 54.824 2902.71 58.03 312.53 2505.69 2561.88 1035.85 1051.74 1046.2Ó 776.60 -701.02 2.74 6031782.78 659109.82 N 702936.303 W 1484156.551 2995.62 60.99 311.58 2552.83 2609.02 1115.84 1131.79 1125.86 830.22 -760.47 3.31 6031835.10 659049.24 N 702936.830 W 14841 58.300 3090.26 63.76 309.38 2596.71 2652.90 1199.67 1215.63 1209.11 884.63 -824.25 3.58 6031888.12 658984.31 N 702937.365 W 148420.178 3186.48 66.67 308.71 2637.05 2693.24 1287.01 1302.98 1295.67 939.64 -892.09 3.09 6031941.66 658915.30 N 702937.906 W148422.175 3282.46 67.95 309.47 2674.07 2730.26 1375.55 1391.53 1383.53 995.48 -960.82 1.52 6031996.00 658845.40 N 70 29 38.455 W148424.197 3377.60 65.55 310.56 2711.62 2767.81 1462.96 1478.94 1470.48 1051.67 -1027.76 2.73 6032050.74 658777.26 N 70 29 39.008 W148426.168 3473.84 65.27 310.26 2751.67 2807.86 1550.47 1566.45 1557.65 1108.40 -1094.40 0.41 6032106.02 658709.43 N 70 29 39.566 W148428.129 3568.11 67.66 311.58 2789.31 2845.50 1636.87 1652.87 1643.82 1165.02 -1159.69 2.84 6032161.22 658642.94 N 702940.122 W 1484210.051 3662.20 70.01 312.20 2823.28 2879.47 1724.55 1740.61 1731.42 1223.60 -1225.00 2.57 6032218.38 658576.39 N 702940.698 W 1484211.974 3756.63 69.10 314.03 2856.27 2912.46 1812.88 1829.09 1819.86 1284.07 -1289.59 2.06 6032277.44 658510.52 N 702941.293 W 1484213.875 3852.41 67.19 314.08 2891.92 2948.11 1901.54 1917.98 1908.74 1345.88 -1353.48 1.99 6032337.86 658445.33 N 70 2941.901 W 1484215.756 3947.76 69.45 313.28 2927.15 2983.34 1989.94 2006.58 1997.32 1407.06 -1417.56 2.50 6032397.65 658379.95 N 70 2942.502 W 1484217.642 . 4043.13 70.20 312.87 2960.04 3016.23 2079.32 2096.09 2086.80 1468.20 -1482.95 0.88 6032457.36 658313.27 N 702943.103 W 1484219.567 4138.06 70.95 313.78 2991.61 3047.80 2168.68 2185.62 2176.30 1529.63 -1548.07 1.20 6032517.37 658246.84 N 702943.707 W 1484221.484 4232.58 71.44 312.12 3022.08 3078.27 2258.02 2275.09 2265.73 1590.59 -1613.56 1.74 6032576.90 658180.06 N 70 29 44.307 W 1484223.412 4330.18 70.26 312.13 3054.10 3110.29 2350.14 2367.29 2357.85 1652.43 -1681.94 1.21 6032637.25 658110.37 N 702944.915 W 1484225.425 4425.25 69.46 312.57 3086.83 3143.02 2439.32 2456.55 2447.04 1712.56 -1747.91 0.95 6032695.95 658043.14 N 70 29 45.506 W 1484227.367 4520.31 69.09 312.70 3120.47 3176.66 2528.12 2545.46 2535.91 1772.78 -1813.31 0.41 6032754.74 657976.45 N 70 29 46.098 W 1484229.293 4552.11 69.00 313.55 3131.84 3188.03 2557.77 2575.15 2565.60 1793.08 -1834.99 2.51 6032774.57 657954.35 N 70 29 46.298 W 1484229.931 4674.52 68.45 314.65 3176.26 3232.45 2671.52 2689.22 2679.66 1872.45 -1916.90 0.95 6032852.16 657870.75 N 702947.078 W 1484232.343 4770.87 68.46 314.11 3211.64 3267.83 2760.86 2778.84 2769.28 1935.13 -1980.95 0.52 6032913.45 657805.37 N 702947.695 W 1484234.229 4866.20 67.83 313.73 3247.13 3303.32 2849.12 2867.32 2857.76 1996.51 -2044.69 0.76 6032973.43 657740.34 N 70 29 48.298 W 1484236.105 4960.57 67.74 313.18 3282.81 3339.00 2936.31 2954.68 2945.11 2056.60 -2108.10 0.55 6033032.14 657675.65 N 70 29 48.889 W 1484237.972 5056.90 67.81 312.42 3319.25 3375.44 3025.36 3043.85 3034.26 2117.18 -2173.53 0.73 6033091.30 657608.94 N 70 29 49.484 W 1484239.899 5150.32 68.76 312.14 3353.81 3410.00 3112.08 3130.64 3121.00 2175.57 -2237.75 1.05 6033148.29 657543.49 N 70 29 50.058 W 1484241.789 5247.03 69.05 312.31 3388.62 3444.81 3202.23 3220.87 3211.17 2236.21 -2304.56 0.34 6033207.47 657475.39 N 70 29 50.655 W 1484243.757 SurveyEditor Ver SP 1.0 Bld( doc40x_56 ) NS21\NS21\NS21\NS21 Generated 7/14/2005 9:23 AM Page 2 of 7 Commenls Measured Inclinalion Azimuth Sub-Sea TVD TVD verlical Along HOle Closure NS EW DLS Norlhing Easting Lalilude Longitude Deplh Seclion Departure (II) (deg) (deg) (ft) ( It) (ft) (It) (It) (It) (fl) (deg/100 ft) (IIUS) (ftUS) 5342.42 69.04 311.65 3422.73 3478.92 3291.25 3309.95 3300.19 2295.79 -2370.78 0.65 6033265.62 657407.91 N 702951.240 W 1484245.707 5436.92 68.95 311.59 3456.61 3512.80 3379.43 3398.17 3388.33 2354.39 -2436.73 0.11 6033322.78 657340.72 N 702951.816 W 1484247.649 5531.98 68.81 311.26 3490.86 3547.05 3468.07 3486.85 3476.92 2413.06 -2503.22 0.36 6033380.00 657272.99 N 702952.393 W 1484249.606 5626.30 68.65 310.74 3525.07 3581.26 3555.94 3574.74 3564.70 2470.72 -2569.56 0.54 6033436.22 657205.44 N 702952.960 W 1484251.560 5720.57 68.63 309.94 3559.41 3615.60 3643.73 3662.54 3652.33 2527.55 -2636.4 7 0.79 6033491.59 657137.32 N 702953.519 W 1484253.530 5815.91 68.79 309.16 3594.03 3650.22 3732.57 3751.37 3740.93 2584.12 -2704.97 0.78 6033546.67 657067.63 N 702954.075 W 1484255.547 5911.42 68.93 308.50 3628.47 3684.66 3821.63 3840.45 3829.69 2639.97 -2774.37 0.66 6033601.02 656997.05 N 70 29 54.624 W 1484257.591 6005.99 68.80 308.28 3662.57 3718.76 3909.81 3928.66 3917.55 2694.75 -2843.50 0.26 6033654.29 656926.76 N 70 29 55.162 W 1484259.626 6102.53 68.62 307.15 3697.63 3753.82 3999.70 4018.61 4007.06 2749.77 -2914.66 1.11 6033707.77 656854.44 N 702955.703 W 148431.722 6198.72 68.39 307.06 3732.87 3789.06 4089.10 4.108.11 4096.04 2803.77 -2986.04 0.25 6033760.21 656781.92 N 70 29 56.234 W 148433.824 . 6292.02 68.90 306.71 3766.85 3823.04 4175.87 4195.01 4182.42 2855.92 -3055.54 0.65 6033810.86 656711.32 N 702956.747 W 148435.870 6387.14 69.44 306.56 3800.67 3856.86 4264.63 4283.91 4270.77 2908.97 -3126.88 0.59 6033862.36 656638.86 N 70 29 57.268 W 148437.971 6482.64 69.47 306.18 3834.19 3890.38 4353.89 4373.33 4359.62 2962.00 -3198.89 0.37 6033913.82 656565.74 N 702957.789 W 1484310.092 6578.20 69.54 306.31 3867.64 3923.83 4443.23 4462.85 4448.56 3014.92 -3271.08 0.15 6033965.18 656492.43 N 70 29 58.309 W 1484312.217 6674.19 69.28 306.17 3901.40 3957.59 4532.91 4552.70 4537.87 3068.05 -3343.55 0.30 6034016.73 656418.84 N 7029 58.832 W 14843 14.352 6769.64 69.26 306.43 3935.19 3991.38 4622.00 4641.97 4626.62 3120.89 -3415.50 0.26 6034068.01 656345.78 N 702959.351 W 1484316.470 6864.73 69.04 307.15 3969.03 4025.22 4710.74 4730.84 4715.06 3174.11 -3486.66 0.74 6034119.69 656273.49 N 70 29 59.874 W 1484318.566 6960.54 68.76 307.70 4003.52 4059.71 4800.04 4820.22 4804.13 3228.43 -3557.65 0.61 6034172.46 656201.36 N 70 30 0.408 W 1484320.657 7055.57 68.51 308.10 4038.14 4094.33 4888.49 4908.72 4892.38 3282.80 -3627.48 0.47 6034225.31 656130.38 N 70 30 0.942 W 1484322.714 7149.83 68.38 308.78 4072. 78 4128.97 4976.13 4996.39 4979.87 3337.30 -3696.15 0.68 6034278.32 656060.56 N 70 301.478 W 1484324.736 7244.67 68.15 309.23 4107.90 4164.09 5064.22 5084.49 5067.84 3392.75 -3764.61 0.50 6034332.28 655990.93 N 70 30 2.023 W 1484326.752 7338.28 67.88 309.70 4142.94 4199.13 5151.02 5171.29 5154.56 3447.92 -3831.62 0.55 6034385.99 655922.76 N 70 302.565 W 1484328.726 7432.10 67.70 310.32 4178.41 4234.60 5237.88 5258.15 5241.36 3503.76 -3898.15 0.64 6034440.39 655855.05 N 70 30 3.114 W 1484330.685 7526.48 67.18 310.97 4214.61 4270.80 5325.03 5345.31 5;328.50 3560.53 -3964.28 0.84 6034495.72 655787.72 N 70 30 3.672 W 1484332.633 7620.28 67.30 311.40 4250.90 4307.09 5411.50 5431.80 5414.99 3617.49 -4029.38 0.44 6034551.26 655721.42 N 70 30 4.232 W 1484334.551 7713.79 67.46 311.68 4286.87 4343.06 5497.78 5518.12 5501.30 3674.73 -4093.98 0.33 6034607.10 655655.60 N 70304.794 W 1484336.454 7807.06 68.88 311.18 4321.55 4377.74 5584.33 5604.70 5587.88 3732.02 -4158.90 1.60 6034662.97 655589.47 N 70 30 5.358 W 1484338.366 . 7901.15 69.58 311.92 4354.92 4411.11 5672.26 5692.67 5675.85 3790.37 -4224.74 1.05 6034719.89 655522.40 N 70305.931 W 1484340.305 7995.84 69.39 312.43 4388.10 4444.29 5760.87 5781.36 5764.53 3849.91 -4290.46 0.54 6034778.00 655455.42 N 70 30 6.516 W 1484342.241 8091.65 69.07 311.77 4422.08 4478.27 5850.39 5870.94 5854.12 3909.97 -4356.93 0.73 6034836.61 655387.68 N70307.107 W 1484344.199 8185.16 68.97 311.51 4455.56 4511.75 5937.66 5958.25 5941.43 3967.98 -4422.18 0.28 6034893.21 655321.20 N 70307.677 W 1484346.122 8280.01 69.04 311.26 4489.54 4545.73 6026.18 6046.81 6029.98 4026.53 -4488.62 0.26 6034950.31 655253.52 N 70 30 8.252 W 1484348.079 8375.40 69.53 311.35 4523.28 4579.47 6115.37 6136.03 6.119.19 408M2 -4555.64 0.52 6035007.74 655185.25 N 70308.831 W 1484350.053 8469.55 69.72 311.05 4556.06 4612.25 6203.61 6224.29 6207.45 4143.56 -4622.05 0.36 6035064.43 655117.61 N 70 30 9.402 W 1484352.010 8563.36 69.78 311.33 4588.53 4644.72 6291.60 6312.30 6295.45 4201.52 -4688.28 0.29 6035120.95 655050.16 N 70 30 9.972 W 1484353.961 8657.37 69.91 311.18 4620.92 4677.11 6379.82 6400.55 6383.70 4259.71 -4754.63 0.20 6035177. 70 654982.58 N 70 3010.544 W 1484355.915 8751.63 70.05 310.66 4653.19 4709.38 6468.37 6489.12 6472.25 4317.72 -4821.55 0.54 6035234.25 654914.43 N 7030 11.114 W 1484357.887 8846.01 70.31 310.01 4685.20 4741.39 6557.16 6577.91 6561.01 4375.19 -4889.23 0.70 6035290.25 654845.54 N 703011.679 W 1484359.881 8939.81 70.40 309.65 4716.73 4772.92 6645.50 6666.25 6649.30 4431.77 -4957.07 0.37 6035345.36 654776.50 N 703012.235 W 14844 1.880 9034.50 70.44 309.84 4748.46 4804.65 6734.71 6755.46 6738.46 4488.81 -5025.67 0.19 6035400.91 654706.70 N 703012.795 W 148443.901 9128.76 70.59 309.52 4779.90 4836.09 6823.57 6844.32 6827.26 4545.55 -5094.06 0.36 6035456.16 654637.11 N 70 30 13.353 W 148445.915 SurveyEditor Ver SP 1.0 Bld( doc40x_56) NS21\NS21\NS21\NS21 Generated 7/14/2005 9:23 AM Page 3 of 7 Comments Measured I Inclination I Azimuth I Sub-Sea TVD I TVD Vertical I AlongHOle ...1 CIQsurel ~!ì EW I DLS I Northing Eastlng Latitude Longitude Depth Section Departure (It) (deg) (deg) (It) (It) (It) (It) ( It) (It) (It) (deg/100 It) (ltUS) (ltUS) 9224.15 70.93 309.62 4811.34 4867.53 6913.63 6934.38 6917.26 4602.92 -5163.48 0.37 6035512.02 654566.47 N 70 30 13.916 W 148447.961 9319.06 70.60 309.44 4842.61 4898.80 7003.24 7024.00 7006.80 4659.96 -5232.60 0.39 6035567.55 654496.15 N 70 30 14.477 W 148449.997 9412.39 70.33 310.07 4873.81 4930.00 7091.20 7111.95 7094.71 4716.21 -5300.22 0.70 6035622.33 654427.34 N 70 30 15.030 W 1484411.989 9506.09 70.03 309.88 4905.58 4961.77 7179.35 7200.10 7182;82 4772.84 -5367.77 0.37 6035677.49 654358.60 N 70 3015.586 W 1484413.980 9599.74 69.73 309.85 4937.80 4993.99 7267.28 7288.04 7270.72 4829.21 -5435.26 0.32 6035732.39 654289.91 N 70 30 16.140 W 14844 15.968 9693.49 69.34 309.43 4970.58 5026.77 7355.12 7375.87 7358.50 4885.24 -5502.90 0.59 6035786.96 654221.09 N 703016.691 W 1484417.961 9786.68 69.20 309.54 5003.56 5059.75 7442.27 7463.03 7445.60 4940.66 -5570.17 0.19 6035840.91 654152.65 N 70 30 17.235 W 1484419.943 9880.19 68.82 309.52 5037.06 5093.25 7529.57 7550.33 7532.85 4996.23 -5637.51 0.41 6035895.02 654084.14 N 7030 17.781 W 1484421.927 9974.01 68.57 309.66 5071.15 5127.34 7616.98 7637.74 7620.20 5051.93 -5704.86 0.30 6035949.26 654015.60 N 70 3018.328 W 1484423.912 10068.45 68.25 309.93 5105.90 5162.09 7704.79 7725.55 7707.98 5108.14 -5772.34 0.43 6036003.99 653946.95 N 70 30 18.881 W 1484425.900 . 10162.54 68.22 309.66 5140.79 5196.98 7792.18 7812.94 7795.32 5164.07 -5839.48 0.27 6036058.46 653878.62 N 70 3019.430 W 1484427.879 10255.25 68.09 309.43 5175.28 5231.47 7878.23 7898.99 7881.33 5218.85 -5905.83 0.27 6036111.81 653811.11 N 70 30 19.969 W 1484429.834 10349.03 68.10 308.90 5210.27 5266.46 7965.23 7986.00 7968.27 5273.81 -5973.29 0.52 6036165.29 653742.49 N 703020.508 W 1484431.822 10444.13 68.85 309.59 5245.16 5301.35 8053.69 8074.47 8056.67 5329.77 -6041.80 1.04 6036219.77 653672. 79 N 70 30 21.058 W 1484433.841 10539.08 69.49 309.99 5278.93 5335.12 8142.44 8163.21 8145.38 5386.57 -6109.99 0.78 6036275.08 653603.40 N 70 30 21.616 W 14844 35.850 10632.93 69.80 309.85 5311.57 5367.76 8230.42 8251.20 8233.34 5443.03 -6177.48 0.36 6036330.08 653534.73 N 70 30 22.171 W 14844 37.839 10728.69 69.75 309.92 5344.68 5400.87 8320.28 8341.05 8323.16 5500.65 -6246.43 0.09 6036386.20 653464.56 N 70 30 22.737 W 1484439.871 10822.41 68.98 309.83 5377.70 5433.89 8407.99 8428.76 8410.84 5556.88 -6313.74 0.83 6036440.96 653396.06 N 70 30 23.290 W 1484441.855 10917.90 68.38 309.43 5412.42 5468.61 8496.94 8517.72 8499.75 5613.62 -6382.25 0.74 6036496.21 653326.35 N 703023.847 W 1484443.874 11013.63 67.96 309.69 5448.02 5504.21 8585.80 8606.58 8588.58 5670.22 -6450.76 0.51 6036551.32 653256.65 N 703024.403 W 1484445.893 11108.15 67.57 309.90 5483.79 5539.98 8673.30 8694.07 8676.04 5726.21 -6517.98 0.46 6036605.86 653188.24 N 70 30 24.953 W 1484447.874 11203.53 67.68 310.30 5520.09 5576.28 8761.49 8782.27 8764.22 5783.03 -6585.45 0.40 6036661.20 653119.58 N 703025.511 W 1484449.862 11299.82 67.85 310.32 5556.53 5612.72 8850.62 8871.40 8853.33 5840.69 -6653.41 0.18 6036717.38 653050.39 N 703026.078 W 1484451.865 11393.83 68.15 310.57 5591.75 5647.94 8937.78 8958.56 8940.49 5897.23 -6719.75 0.40 6036772.48 652982.86 N 703026.633 W 1484453.820 11488.61 68.54 310.71 5626.72 5682.91 9025.86 9046.66 9028.57 5954.60 -6786.59 0.43 6036828.40 652914.80 N 70 30 27.197 W 1484455.790 11583.94 68.60 310.47 5661.55 5717.74 9114.6Ò 9135.40 9117.31 6012.34 -6853.98 0.24 6036884.67 652846.20 N 70 30 27. 764 W 1484457.777 11679.15 68.95 310.68 5696.02 5752.21 9203.34 9224.15 9206.05 6070.07 -6921.39 0.42 6036940.94 652777.56 N 70 30 28.331 W 1484459.764 . 11773.94 68.97 310.21 5730.05 5786.24 9291.81 9312.62 9294.51 6127.46 -6988.72 0.46 6036996.86 652709.02 N 70 30 28.895 W 148451.748 11868.70 69.37 310.28 5763.75 5819.94 9380.37 9401.18 9383.07 6184.68 -7056.32 0.43 6037052.61 652640.21 N 70 30 29.457 W 148453.741 11963.82 69.57 309.81 5797.11 5853.30 9469.45 9490.26 9472.13 6241.99 -7124.51 0.51 6037108.44 652570.81 N 70 30 30.020 W 148455.751 12058.07 69.82 309.15 5829.81 5886.00 9557.84 9578.65 9560.48 6298.19 -7192.74 0.71 6037163.16 652501.39 N 70 30 30.572 W 148457.762 12154.03 69.86 309.30 5862.89 5919.08 9647.91 9668.74 9650.51 6355.16 -7262.52 0.15 6037218.60 652430.41 N703031.132 W 148459.819 12250.15 69.74 308.62 5896.08 5952.27 9738.11 9758.94 9.740.64 64.11.88 -7332.67 0.68 6037273.80 652359.07 N 703031.689 W 1484511.886 12345.85 69.62 308.20 5929.31 5985.50 9827.82 9848.69 9830.29 6467.63 -7402.99 0.43 6037328.03 652287.57 N 703032.237 W 1484513.959 12439.74 69.63 308.53 5962.00 6018.19 9915.81 9936.70 9918.,10 6522.26 -7472.00 0.33 6037381.16 652217.40 N 703032.773 W 1484515.993 12533.28 69.49 307.97 5994.67 6050.86 10003.43 10024.35 10005.74 6576.53 -7540.83 0.58 6037433.93 652147.43 N 70 30 33.306 W 1484518.022 12629.54 69.32 307.60 6028.53 6084.72 10093.47 10114.46 10095.70 6631.74 -7612.04 0.40 6037487.59 652075.05 N 70 30 33.849 W 1484520.121 12723.51 69.14 307.61 6061.85 6118.04 10181.27 10202.32 10183-40 6685.35 -7681.65 0.19 6037539.69 652004.31 N 703034.375 W 1484522.173 12818.16 68.79 307.29 6095.82 6152.01 10269.53 10290.67 10271.57 6739.07 -7751.79 0.49 6037591.88 651933.04 N 70 30 34.903 W 1484524.240 12913.46 68.65 307.07 6130.41 6186.60 10358.24 10379.47 10360.18 6792.73 -7822.54 0.26 6037644.01 651861.16 N 70 30 35.430 W 1484526.326 SurveyEdítor Ver SP 1.0 Bld( doc40x_56 ) NS21\NS21\NS21\NS21 Generated 7/14/2005 9:23 AM Page 4 of 7 Comments Measured Inclination Azimuth Sub-Sea TVD TVD VertiCal' Alon9Ho'el Closure I NS EW DLS Northing Easting Latitude Longitude Depth Section Departure (It) (deg) (deg) (It) ( II) (II) (It) (It) (It) (II) (deg/100 II) (ltUS) (ltUS) 13008.02 68.54 307.33 6164.92 6221.11 10446.18 10467.51 10448.03 6845.96 -7892.66 0.28 6037695.72 651789.91 N 70 30 35.953 W 1484528.393 13101.85 68.45 306.88 6199.32 6255.51 10533.38 10554.80 10535.13 6898.63 -7962.29 0.46 6037746.87 651719.18 N 703036.470 W 1484530.445 13197.67 68.24 306.76 6234.68 6290.87 10622.31 10643.86 10623.91 6952.00 -8033.58 0.25 6037798.69 651646.76 N 703036.994 W 1484532.547 13290.11 68.35 307.97 6268.86 6325.05 10708.11 10729.75 10709.69 7004.12 -8101.84 1.22 6037849.33 651577.40 N 703037.506 W 1484534.559 13385.32 68.30 307.91 6304.03 6360.22 10796.54 10818.23 10198.a6 70.58.52 -8171.62 0.08 6037902.21 651506.47 N 70 30 38.040 W 1484536.616 13479.11 68.40 308.39 6338.63 6394.82 10883.68 10905.40 10885.14 7112.37 -8240.17 0.49 6037954.57 651436.78 N 70 30 38.569 W 1484538.637 13575.04 68.59 308.81 6373.80 6429.99 10972.91 10994.65 10974.32 7168.05 -8309.92 0.45 6038008.74 651365.86 N 70 30 39.116 W 1484540.694 13667.99 68.65 308.84 6407.68 6463.87 11059.44 11081.20 11060.83 7222.32 -8377.35 0.07 6038061.54 651297.28 N 703039.649 W 1484542.682 13763.73 68.85 309.43 6442.38 6498.57 11148.67 11170.44 11150.02 7278.63 -8446.56 0.61 6038116.35 651226.88 N 70 3040.202 W 1484544.722 13860.27 68.91 309.49 6477.17 6533.36 11238,72 11260.49 11240.05 7335.87 -8516.09 0.08 6038172.07 651156.14 N 703040.764 W 1484546.772 . 13955.93 68.79 309.02 6511.68 6567.87 11327.93 11349.71 11329.24 7392.32 -8585.17 0.48 6038227.02 651085.87 N 70 3041.318 W 1484548.809 14051.29 69.07 309.52 6545.97 6602.16 11416.91 11438.69 11418.19 7448.65 -8654.06 0.57 6038281.85 651015.79 N 70 3041.871 W 1484550.840 14148.54 69.08 309.42 6580.70 6636.89 11507.74 11529.53 11509.01 7506.39 -8724.19 0.10 6038338.07 650944.45 N 70 30 42.439 W 1484552.908 14241.54 69.24 309.30 6613.79 6669.98 11594.66 11616.44 11595.90 7561.51 -8791.39 0.21 6038391.73 650876.08 N 70 30 42.980 W 1484554.889 14337.11 69.45 308.97 6647.50 6703.69 11684.08 11705.87 11685.29 7617.95 -8860.75 0.39 6038446.66 650805.52 N 703043.534 W 1484556.935 14431.78 69.77 309.39 6680.48 6736.67 11772.81 11794.61 11774.00 7674.01 -8929.54 0.54 6038501.23 650735.55 N 70 30 44.085 W 1484558.963 14526.20 69.64 309.09 6713.23 6769.42 11861.36 11883.17 11862.53 7730.03 -8998.13 0.33 6038555.76 650665.78 N 70 30 44.635 W 148460.985 14622.01 69.48 309.37 6746.69 6802.88 11951.13 11972.94 11952.28 7786.81 -9067.67 0.32 6038611.02 650595.04 N 703045.192 W 148463.036 14716.97 69.36 309.29 6780.07 6836.26 12040.03 12061.84 12041.16 7843.15 -9136.43 0.15 6038665.87 650525.08 N 70 3045.746 W 148465.064 14813.17 69.06 309.27 6814.22 6870.41 12129.96 12151.78 12131.07 7900.09 -9206.05 0.31 6038721.30 650454.26 N 70 30 46.305 W148467.117 14908.31 68.61 309.24 6848.57 6904.76 12218.68 12240.50 12219,76 7956.23 -9274.75 0.47 6038775.94 650384.38 N 70 30 46.856 W 148469.142 15004.15 68.45 309.67 6883.65 6939.84 12307.87 12329.69 12308.94 8012.91 -9343.62 0.45 6038831.12 650314.32 N 70 30 47.413 W 1484611.173 15098.65 68.18 309.73 6918.56 6974.75 12395.68 12417.50 12396.74 8069.00 -9411.18 0.29 6038885.75 650245.57 N 70 30 47.963 W 1484613.166 15193.87 68.12 309.79 6954.00 7010.19 12484.06 12505.88 12485.11 8125.53 -9479.12 0.09 6038940.79 650176.43 N703048.519 W1484615.169 15291.37 68.21 309.35 6990.27 7046.46 12574.56 12596.39 12575.60. 8183.18 -9548.88 0.43 6038996.93 650105.45 N 70 3049.085 W 14846 17.227 15384.96 68.29 309.13 7024.95 7081.14 12661.48 12683.31 12662.50 8238.17 -9616.21 0.23 6039050.45 650036.96 N 70 30 49.625 W 1484619.212 15481.23 68.34 308.26 7060.52 7116.71 12750.92 12772.77 12751.91 8294.09 -9686.03 0.84 6039104.86 649965.96 N 703050.174 W 1484621.271 15576.00 68.21 307.71 7095.60 7151.79 12838.91 12860.81 12839.86 8348.28 -9755.42 0.56 6039157.54 649895.43 N 70 30 50.706 W 1484623.318 . 15673.27 68.22 307.22 7131.70 7187.89 12929.15 12951.13 12930.05 8403.22 -9827.11 0.47 6039210.92 649822.58 N 703051.245 W 1484625.432 15768.12 68.18 306.71 7166.92 7223.11 13017.11 13039.20 13017.95 8456.18 -9897.47 0.50 6039262.35 649751.10 N 70 30 51.765 W 1484627.507 15864 .44 68.39 306.90 7202.56 7258.75 13106.47 13128.68 13107.25 8509.79 -9969.12 0.28 6039314.40 649678.32 N 70 30 52.291 W 1484629.620 15958.61 69.19 307.21 7236.63 7292.82 13194.15 13216.47 13194.88 8562.69 -10039.18 0.90 6039365.78 649607.14 N 70 30 52.811 W 1484631.686 16008.85 69.83 307.04 7254.22 7310.41 13241.16 13263.54 13241.86 8591.09 -10076.71 1.31 6039393.37 649569.02 N 703053.089 W 1484632.793 16105.83 69.84 307.21 7287.65 7343.84 13332.09 13354.57 13332.74 8646.04 -10149.29 0.16 6039446.74 649495.28 N 703053.629 W 1484634.933 16202.91 69.94 306.99 7321.03 7377.22 13423.15 13445.73 13423.75 8701.03 -10222.00 0.24 6039500.15 649421.41 N 703054.169 W 1484637.078 16299.09 70.08 307.13 7353.91 7410.10 13513.42 13536.12 13513.98 8755.50 -10294.13 0.20 6039553.05 649348.13 N 70 30 54.703 W 1484639.205 16396.42 70.15 306.75 7387.01 7443.20 13604.83 13627.64 13605.35 8810.50 -10367.28 0.37 6039606.4 7 649273.82 N 70 30 55.243 W 1484641.362 16493.25 70.03 306.92 7419.99 7476.18 13695.75 13718.69 13696.22 8865.08 -10440.15 0.21 6039659.47 649199.80 N 70 30 55.779 W 1484643.511 16589.59 69.68 306.85 7453.16 7509.35 13786.07 13809.13 13786.50 8919.37 -10512.49 0.37 6039712.18 649126.31 N 70 30 56.312 W 1484645.645 16686.85 69.43 307.04 7487.14 7543.33 13877.09 13900.27 13877 .48 8974.14 -10585.33 0.32 6039765.38 649052.32 N 70 30 56.850 W 1484647.793 16782.83 69.07 306.85 7521.14 7577.33 13966.72 13990.02 13967.08 9028.09 -10657.06 0.42 6039817.76 648979.45 N 70 30 57.379 W 1484649.909 SurveyEditor Ver SP 1.0 Bld( doc40x_56 ) NS21\NS21\NS21\N$21 Generated 7/14/2005 9:23 AM Page 5 of 7 Comments Measured I Inclination I Azimuth I Sub-Sea TVD I TVD Vertical I Along Hole I Closure I NS EW I DLS I Northing Easting Latitude Longitude Depth Section Departure (It) (deg) (deg) ( ft) (It) (It) (It) (It) ( ft) (It) (deg/100 It) (ftUS) (ltUS) 16879.40 68.76 306.78 7555.88 7612.07 14056.70 14080.13 14057.02 9082.09 -10729.20 0.33 6039870.19 648906.18 N 70 30 57.909 W 1484652.037 16977.34 68.49 307.22 7591.58 7647.77 14147.79 14171.33 14148.08 9136.97 -10802.03 0.50 6039923.50 648832.18 N 70 30 58.448 W 1484654.185 17072.94 68.49 306.65 7626.63 7682.82 14236.62 14260.27 14236.87 9190.42 -10873.12 0.55 6039975.40 648759.96 N 70 30 58.973 W 1484656.282 17169.61 68.42 306.48 7662.13 7718.32 14326.38 14350.18 14326.61 9243.98 -10945.34 0.18 6040027.39 648686.61 N 70 30 59.498 W 1484658.412 17266.27 68.35 306.39 7697.74 7753.93 14416.08 14440.05 14416.28 9297.35 -11017.64 0.11 6040079.19 648613.19 N 7031 0.022 W 148470.545 17362.86 68.44 306.93 7733.31 7789.50 14505.75 14529.85 14505.92 9350.97 -11089.68 0.53 6040131.25 648540.02 N 7031 0.549 W 148472.669 17459.64 68.43 306.26 7768.88 7825.07 14595.61 14619.86 14595.75 9404.63 -11161.94 0.64 6040183.34 648466.63 N 70 311.075 W 148474.801 17556.20 68.47 306.48 7804.35 7860.54 14685.25 14709.67 14685.37 9457.89 -11234.26 0.22 6040235.02 648393.19 N 70 31 1.598 W 148476.934 17652.26 68.49 306.66 7839.58 7895.77 14774.47 14799.03 14774.57 9511.13 -11306.03 0.18 6040286.71 648320.30 N 70 312.120 W 148479.051 17749.04 68.52 306.53 7875.05 7931.24 14864.37 14889.08 14864.45 9564.81 -11378.33 0.13 6040338.82 648246.87 N 70 31 2.647 W1484711.184 . 17845.75 68.51 306.96 7910.47 7966.66 14954.23 14979.07 14954.29 9618.65 -11450.44 0.41 6040391.09 648173.62 N 70 313.176 W 1484713.311 17942.70 68.42 306.82 7946.05 8002.24 15044.29 15069.25 15044.34 9672.78 -11522.56 0.16 6040443.66 648100.35 N 7031 3.707 W 1484715.439 18039.18 68.50 306.20 7981.48 8037.67 15133.88 15158.99 15133.92 9726.18 -11594.69 0.60 6040495.48 648027.10 N 70 31 4.231 W 1484717.567 18135.48 68.12 306.77 8017.07 8073.26 15223.20 15248.48 15223.23 97;79.38 -11666.64 0.68 6040547.13 647954.03 N 70 314.753 W 1484719.689 18232.20 67.13 306.87 8053.89 8110.08 15312.51 15337.91 15312.53 9832.98 -11738.23 1.03 6040599.17 647881.31 N 7031 5.279 W 1484721.801 18328.99 66.08 307.09 8092.32 8148.51 15401.23 15426.74 15401.25 9886.42 -11809.20 1.10 6040651.07 647809.22 N 70 31 5.804 W 1484723.895 18425.49 64.89 307.96 8132.36 8188.55 15488.96 15514.54 15488.97 99;39.89 -11878.83 1.48 6040703.03 647738.45 N 7031 6.328 W 1484725.949 18522.33 63.35 308.30 8174.63 8230.82 15576.04 15601.67 15576.05 9993.69 -11947.36 1.62 6040755.33 647668.78 N 7031 6.856 W 1484727.971 18619.42 61.78 308.87 8219.36 8275.55 15662.19 15687.84 15662.1¡:J 10047.43 -12014.72 1.70 6040807.61 647600.29 N 7031 7.384 W 1484729.958 18716.29 60.60 308.94 8266.04 8322.23 15747.05 15772.71 15747.06 101,00.73 -12080.77 1.22 6040859.48 647533.12 N 70 31 7.907 W 1484731.907 18812.79 58.92 309.60 8314.64 8370.83 15830.41 15856.08 15830.42 10153.50 -12145.31 1.84 6040910.84 647467.46 N 70 31 8.425 W 1484733.812 18909.73 57.27 309.94 8365.87 8422.06 15912.71 15938.37 15912.71 10206.14 -12208.57 1.73 6040962.10 647403.09 N 7031 8.942 W 1484735.678 19006.33 55.64 309.73 8419.25 8475.44 15993.22 16018.88 15993.22 10257.71 -12270.39 1.70 6041012.33 647340.18 N 7031 9.448 W 1484737.502 19103.23 53.94 309.83 8475.12 8531.31 16072.39 16098.05 16072.39 10308.37 -12331.23 1.76 6041061.66 647278.27 N 7031 9.945 W 1484739.298 19200.70 52.22 310.23 8533.67 8589.86 16150.31 16175.97 16150.31 10358.48 -12390.90 1.79 6041110.48 647217.55 N 7031 10.437 W 1484741.058 19295.90 50.51 310.67 8593.10 8649.29 16224.66 16250.33 16224.67 10406.72 -12447.49 1.83 6041157.49 647159.94 N 7031 10.910 W 1484742.728 19393.61 49.42 310.30 8655.95 8712.14 16299.47 16325.14 16299.47 10455.29 -12504.38 1.15 6041204.83 647102.01 N 7031 11.387 W 1484744.408 19490.51 48.03 309.65 8719.88 8776.07 16372.29 16397.97 16372.30 10502.08 -12560.19 1.52 6041250.40 647045.22 N 7031 11.846 W 1484746.054 . 19585.44 46.62 309.19 8784.22 8840.41 16442.08 16467.76 16442.08 10546.40 -12614.10 1.53 6041293.55 646990.37 N 7031 12.281 W 1484747.645 19682.50 45.02 308.50 8851.86 8908.05 16511.67 16537.36 16511.68 10590.06 -12668.31 1.73 6041336.03 646935.24 N 70 31 12.710 W 1484749.245 19779.14 43.46 307.89 8921.10 8977.29 16579.07 16604.78 16579.07 10631.76 -12721.29 1.67 6041376.57 646881.38 N 703113.119 W 1484750.808 19876.39 41.87 306.99 8992.61 9048.80 16644.91 16670.69 16644.91 10671.83 -12773.61 1.75 6041415.51 646828.21 N703113.512 W 1484752.352 19973.03 40.30 306.17 9065.44 9121.63 16708.31 16734.19 16708.3.1 10709.68 -12824.61 1.72 6041452.25 646776.42 N703113.884 W 1484753.857 20070.65 38.49 305.73 9140.88 9197.07 16770.12 16796.15 16770.12 10746.06 -12874.76 1.88 6041487.54 646725.50 N 70 31 14.241 W 1484755.337 20168.35 37.09 305.61 9218.09 9274.28 16829.83 16856.01 16829.83 10780.96 -12923.39 1.43 6041521.39 646676.13 N 70 31 14.583 W 1484756.772 20223.62 37.10 304.75 9262.17 9318.36 16863.05 16889.35 16863.06 10800.17 -12950.64 0.94 6041540.01 646648.48 N 70 31 14.771 W 1484757.576 20319.46 35.63 305.50 9339.35 9395.54 16919.68 16946.17 16919.69 10832.86 -12997.12 1.60 6041571.69 646601.31 N 70 31 15.092 W 1484758.947 20418.79 33.94 304.34 9420.92 9477.11 16976.14 17002.84 16976.15 10865.31 -13043.57 1.83 6041603.12 646554.18 N 70 3115.410 W 148480.318 20514.67 32.54 303.90 9501.11 9557.30 17028.43 17055.39 17028.45 10894.79 -13087.08 1.48 6041631.66 646510.05 N 70 31 15.700 W 148481.602 20611.36 31.08 306.50 9583.28 9639.4 7 17079.21 17106.35 17079.23 10924.14 -13128.73 2.07 6041660.11 646467.78 N 70 31 15.988 W 148482.831 20708.11 29.72 309.58 9666.73 9722.92 17128.13 17155.30 17128.15 10954.28 -13167.29 2.14 6041689.41 646428.58 N 70 31 16.283 W 148483.969 SurveyEditor Ver SP 1.0 Bld( doc40x_56 ) NS21\N$21\N$21\NS21 Generated 7/14/2005 9:23 AM Page 6 of 7 1 ' I Comments Measured I Inclination I Azimuth I Sub-Sea TVD I TVD Vertical I Along Hole I Closure j NS EW I DLS I Northing Eastlng Latitude Longitude ] Depth Section Departure (II) (deg) (deg) (II) (II) (II) (II! (II) (II) (II) (deg/100 II) (IIUS) (IIUS) 20805.28 28.69 311.15 9751.55 9807.74 17175.53 17202.71 17175.56 10984.97 -13203.42 1.32 6041719.32 646391.81 N 7031 16.585 W 148485.035 20901.53 28.78 311.43 9835.95 9892.14 17221.79 17248.98 17221.82 11015.51 -13238.19 0.17 6041749.10 646356.39 N 7031 16.884 W 148486.061 20999.10 28.14 311.19 9921.73 9977.92 17268.27 17295.48 17268.30 11046.20 -13273.11 0.67 6041779.03 646320.82 N703117.185 W 148487.092 21094.19 25.94 310.29 10006.42 10062.61 17311.49 17338.70 17311;52 11074.42 -13305.85 2.35 6041806.54 646287.48 N 7031 17.462 W 148488.058 21190.56 23.90 308.78 10093.81 10150.00 17352.09 17379.30 17352.12 11100.28 -13337.15 2.22 6041831.72 646255.63 N 7031 17.716 W 148488.982 21289.70 22.29 308.21 10185.00 10241.19 17390.97 17418.19 17390.99 11124.49 -13367.58 1.64 6041855.27 646224.69 N 7031 17.954 W 148489.880 21383.40 20.66 307.53 10272.20 10328.39 17425.25 17452.49 17425.28 11145.56 -13394.66 1.76 6041875.74 646197.17 N703118.160 W 1484810.679 21480.41 18.78 306.92 10363.51 10419.70 17457.95 17485.22 17457.98 11165.36 -13420.72 1.95 6041894.98 646170.70 N 70 31 18.355 W 148 48 11.448 21578.44 17.45 307.31 10456.68 10512.87 17488.39 17515.70 17488.42 11183.75 -13445.02 1.36 6041912.84 646146.00 N 70 31 18.535 W 1484812.166 21674.11 16.24 307.41 10548.25 1 0604.44 17516.09 17543.43 17516.12 11200.57 -13467.06 1.27 6041929.19 646123.61 N 70 31 18.700 W 1484812.816 L.WD+IFR+MS 21772.08 14.86 307.51 10642.63 10698.82 17542.33 17569.69 17542.36 11216.55 -13487.91 1.41 6041944.71 646102.43 N703118.857 W 1484813.431 21868.19 13.84 307.05 10735.74 10791.93 17566.12 17593.51 17566.16 11230.98 -13506.86 1.07 6041958.73 646083.17 N 70 31 18.999 W 1484813.991 21897.40 13.56 307.07 10764.12 10820.31 17573.03 17600.43 17573.07 11235.15 -13512.38 0.96 6041962.78 646077.56 N 70 31 19.039 W 1484814.154 First MWD Standard 22018.01 15.34 303.45 10880.91 10937.10 17603.01 17630.51 17603.06 11252.46 -13536.97 1.65 6041979.56 646052.60 N 70 31 19.209 W 1484814.879 22112.72 15.97 302.00 10972.11 11028.30 17628.37 17656.07 17628.42 11266.27 -13558.48 0.78 6041992.90 646030.81 N 70 31 19.345 W 1484815.514 Last MWD Standard 22169.40 14.94 306.21 11026.74 11082.93 17643.39 17671.17 17643.44 11274.72 -13570.98 2.69 6042001.08 646018.12 N 7031 19.428 W 1484815.883 TO ( Projected) 22261.00 14.94 306.21 11115.24 11171.43 17666.95 17694.78 17667.01 11288.67 -13590.04 0.00 6042014.62 645998.78 N703119.564 W1484816.445 Survey Type: Definitive Survey NOTES: GYD GC SS - ( Gyrodata - gyro single shots -- Gyrodata gyro orientation surveys. Not to be run above 70 degrees inclination. ) MWD + IFR + MS - ( In-field referenced MWD with mult-station analysis and correction applied in post-processing. Assumes a BHA sag correction is applied to enhance inclination accuracy. ) MWD - Standard -- ( Measurement While Drilling with no (or no known) special correc~ions. The model allows for the fact that axial interference may marginally exceed the upper limit specified when the well is near horizontal east/west.) Le¡:ral Description: Surface: 1249 FSL 646 FEL S11 T13N R13E UM BHL: 1965 FSL 3667 FEL S33 T14N R13E UM Northing (Y) [ftUS] 6031021.48 6042014.62 Easting (X) [ftuS] 659827.32 645998.78 . SurveyEditor Ver SP 1.0 Bld( doc40x_56 ) NS21\NS21\NS21\NS21 Generated 7/14/2005 9:23 AM Page 7 of 7 RE(~Ei\!E a STATE OF ALASKA A' ALASðólL AND GAS CONSERVATION CO~SION JUN 1 5 2005 REPORT OF SUNDRY WELL OPERATIONiaOì!& 1. Operations Performed: Abandon 0 Alter CasingD Change Approved Program D Repair WellD Pull TubingO Operation ShutdownO PluQ Perforations D Perforate New PoolD Perforate 0 Stimulate ŒI WaiverD tì8~~~EPr; Time Extension D Re-enter Suspended WellD 5. Permit to Drill Number: 202-2180 6. API Number 50-029-23126-00-00 2. Operator Name: 3. Address: BP Exploration (Alaska), Inc. 4. Current Well Class: Development 00 ExploratoryD P.O. Box 196612 Anchorage, Ak 99519-6612 7. KB Elevation (ft): 56.19 8. Property Designation: ADL-312798 11. Present Well Condition Summary: StratigraphicD ServiceD 9. Well Name and Number: NS21 10. Field/Pool(s): Northstar Field / Northstar Oil Pool Total Depth measured 22261 feet true vertical 11171.4 feet Effective Depth measured 22258 feet true vertical 11168.5 feet Plugs (measured) None Junk (measured) Junk - Centralizer Arm @ 22258 (08/02/2004) Casing Length Size LINER 496 4-1/2" 12.6# 13Cr80 LINER 1996 7" 26# L-80 PRODUCTION 20107 9-5/8" 47# L-80 SURFACE 4562 13-3/8" 68# L-80 MD TVD Burst Collapse 21765 - 22261 10692.0 - 11171.4 8430 7500 19949 - 21945 9103.4 - 10866.5 7240 5410 43 - 20150 43.0 - 9259.7 6870 4760 44 - 4606 44.0 - 3207.5 4930 2270 Perforation depth: Measured depth: 22164 - 22184,22184 - 22264 True vertical depth: 11077.72 -11097.04,11097.04 -11174.33 TubinQ ( size, Qrade, and measured depth): 4-1/2" 12.6# 13Cr80 @ 41 21766 Packers & SSSV (type & measured depth): 4-1/2" Baker ZXP Packer 7" Top Packer 4-1/2" Baker S-3 Perm Packer 4-1/2" TRM-4E SSV @ 21765 @ 19949 @ 21721 @ 988 RBDMS 8Fl JUN 2 0 2005 12. Stimulation or cement squeeze summary: Intervals treated (measured): 22164 - 22264 Treatment descriptions including volumes used and final pressure: 69 bbls 12% HCL, 24 bbls Foam (NH4CL + N2). Max Tubing Pressure 2050 psi. Prior to well operation: Subsequent to operation: Oil-Bbl 3084 4560 Representative Dailv Averaae Production or Injection Data Gas-Me! Water-Bbl Casing Pressure 6947 2461 0 9761 4759 0 Tubing Pressure 735 749 13 14. Attachments: 2.Ç 15. Well Class after proposed work: ExploratoryD 16. Well Status after proposed work: OilŒ] GasD DevelopmentŒ ServiceD Copies of Logs and Surveys run _ Daily Report of Well Operations _ WAG 0 GINJD WINJD WDSPLD Prepared by DeWayne R. Schnorr (907) 564-5174 SUndry Number or N/A if C.O. Exempt: 304-270 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact DeWayne Schnorr Printed Name DeWayne Schnorr Signature ~d!r'u .~~~ Title Petroleum Engineer Phone 564-5174 Date 6/15/05 Form 10-404 Revised 4/2004 . . NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY 05/01/05 ACID/SCALE INHIBITION TREATMENT; RU HARDLlNE TO COMPANION VALVE. HEAT SEAWATER AND DIESEL. PUMP TUBING PICKLE AS PER PROCEDURE; 12 BBLS 12% HCL, DISPLACE WITH 215 BBLS SW AND 104 BBLS DIESEL. FLOW BACK PICKLE VOLUME OF 331 BBLS TO WELL CLEAN UP TANK. PREP FOR PRIMARY ACID TREATMENT AND WAIT FOR PICKLE FLOW BACK. JOB IN PROGRESS. 05/02/05 ACID/SCALE INHIBITION TREATMENT; HEAT DIESEL FOR PRIMARY ACID TREATMENT. WAIT ON PICKLE FLOW BACK. PUMP MAIN TREATMENT: 60 BBLS OF 12% HCL ACID W/ SCALE INHIBITOR (10%) IN 2 STAGES USING N2 FOAM AS DIVERTING AGENT. OVERDISPLACE WITH 56 BBLS 2% KCL, 233 BBLS OF SW AND 104 BBLS OF DIESEL. REQUEST PRODUCTION CONTROL FOR A 4 HOUR SOAK TIME PRIOR TO POP. JOB COMPLETE.. . NOTE: NO SIGNIFICANT PRESSURE RESPONSE FROM ACID OR FOAM DIVERSION STAGES. PUMP SCHEDULE REPORTS FLUID BBLS ONLY, NO NITROGEN VOLUME IN CUM. BBLS RECORDED. FLUIDS PUMPED BBLS 5 Methanol 5 Neat Methanol 416 Diesel 448 Seawater 127 2% KCL Water 30 2% KCL Slick Water 69 12% HCUSI 24 Foam (NH4CL + N2) 1124 TOTAL Page 1 · TREE: ABB-VGI 5 1/8" 5ksi . WELLHEAD: ABB-VGI13-5/8" Multibowl 5ksi NS21 133/8", 68#/ft, L-80, BTC @ 4606' MD ~ 4 1/2", 12.6#/ft. 13-Cr, Vam-Ace TUBING ID: 3.958", CAPACITY: 0.01522 BBLlFT 9-5/8" 47# L-80 BTM-C @ 20150' MD ¡¡- ~ 4.5" X NIPPLE, @ 21699' MD 3.813" ID 4.5" X NIPPLE, @ 21744' MD ~ 3.813" ID 4.5" XN NIPPLE, @ 21755' MD 3.725" ID 4.5" WLEG, @ 21766' MD ----a 3.85" ID ~ 1", 26#/ft L-80, Hydril 521 @ 21945' MD _M ~'J"k)\ 9.MoV\Rf ÆHOO RX:l<>g (6'1.Q4J AlUEAT TtP Ffff': m»: fW'it k,fhd.::OOr, rof« ~~ 1",,1 ~ IntìaJ Pxt . Ow¡¡¡>: fhN",ÍO! H\oI>( RJ:!OO> HSQ Rimtralim 71"; I SlZEI STI NlBNAL MJI ":;.,~~ r;:¿; : :.~ I !.»;(E I 288 6 221M· 2Z'!)4' 11004'· 11œ? ctY' G'141<004 .,f,88 b 2.<. Jf; ¥-I}'I 1/0'78-'7 01'11 Ol/IS/OS PBTD @ 22268' MD TD @ 22261' MD " i À DATE 11/12/02 02/25/04 06/21/04 08/18/04 REV. BY JAS JAS EMF EMF COMMENTS "'NS21 Proposed NS21 Proposed Add Perf Add Fish l- I (I- ~ .INAL KB. ELEV = 56' F. ELEV = 40.1' CB. ELEV = 15.9' 4 1/2" TRM-4E SSSV @988' MD W/4 1/2 "X" PROFILE 3.812" ID ~ 41/2" GLM @ 8138' MD (4504'TVD) w/ 4.62" ID 4 1/2" GLM @ 13718' MD (6503'TVD) w/4.62" ID M - 7" LINER TOP @ 19949' MD """" 4.5" Fiber Optic Transducer @ 21703' MDelm - 3.958" ID ~_ 7"PACKER,13Cr@21721'MD 4.5" LINER TOP @ 21765' MD ... Fish in hole: Centralizer arm (1" x 7.38") 4.5", 12.6#, 13Cr Vam Ace Northstar WF : NS?1 API NO: 50-0?9·?31?6-00 BP Exploration (Alaska) , -- e ,~, i [Wi \:\" @ .~n' r:::; II ¡ I ! ~ ~U FRANK H. MURKOWSKI, GOVERNOR AI,ASIiA OIL AND GAS CONSERVATION COMMISSION 333 W. 7'" AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501·3539 PHONE (907) 279-1433 FAX (907)27~7542 Michael Francis Petroleum Engineer BP Exploration (Alaska), Inc. PO Box 196612 Anchorage, AK 99519 'J-t?~ Re: NS 21 305-104 Dear Mr. Francis: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. Please provide at least twenty-four (24) hours notice for a representative of the Commission to witness any required test. Contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23r y following the date of this letter, or the next working day if the 23rd day falls on hol day or weekend. A person may not appeal a Commission decision to Superi Co unless rehearing has been requested. DATEDthiS~APril ,2005 Enc!. '. f . bp e e -.... .p~fJC ..s i. ·;.t~)\, "~ BP Exploration (Alaska) Inc. 900 East Benson Boulevard P. O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561·5111 April 25, 2005 Winton Aubert Alaska Oil & Gas Conservation Commission 333 West ¡th Avenue Suite 100 Anchorage, AK 99501 Dear Winton: Re: Sundry Notice for NS21 to Acidize (Ivishak) BP Exploration Alaska, Inc. proposes to acidize the NS21 ~II. This well has exhibited a high rate of decline and analysis of formation water indicates the formation of CaC03 scale is likely. Offset wells have responded very well to similar treatments in the past. The procedure includes the following major steps: . Bullhead HCI based acid treatment (which includes scale inhibitor) ,,/ . Flowback Sincerely, RECEIVED APR 2 5 2005 Alaska Oil & Gas Coos. commission Anchorage e STATE OF ALASKA e ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVAL .....t· ( 20 AAC 25.280 1. Type of Request: 0 0 Abandon Suspend Alter Casing 0 Repair Well 0 Change Approved Program 0 Pull Tubing 0 ~6Æ- 5/2f,/lðD$ orS 5/Z7/5 Operation Shutdown Plug Perforations Perforate New Pool 4. Current Well Class: D o o PerforateD /' waiverD StimulateŒJ Time Extension 0 Re-enter Suspended Well 0 5. Permit to Drill~ber: 202-2180 2. Operator Name: 3. Address: BP Exploration (Alaska), Inc. Development ŒJ /' Exploratory D P.O. Box 196612 Anchorage, Ak 99519-6612 Stratigraphic 0 Service D 9. Well Name and Number: NS21 / 10. Field/Pool(s): Northstar Field / Northstar Oil Pool PRESENT WELL CONDITION SUMMARY IEffective Depth MD (It): Effective Depth TVD (It): 22258 11112.4 Size MD TVD 7. KB Elevation (It): 56.19 KB 8. Property Designation: ADL-312798 11. Present Total Depth MD (It): 22261 Casing Total Depth TVD (It): 11171.4 Length 494 4-1/2" 12.6# 13Cr80 1993 7" 26# L-80 12115 9-5/8" 47# L-80 4562 13-3/8" 68# L-80 I Perforation Depth TVD (ft): 11078 - 11097.0 top 21765 19949 43 44 I bottom top 22259 10692.0 ~1 9103.4 ZPIS:1 ho 606 iUGIr 44.0 Tubing Size: 4-1/2 " 12.6 # Packers and SSSV MD (It): LINER LINER PRODUCTION SURFACE Perforation Depth MD (It): 22164 - 22184 Packers and SSSV Type: 4-1/2" Baker ZXP Packer 7" Top Packer 4-1/2" TRM-4E SSV 4-1/2" Baker S-3 Perm Packer 12. Attachments: 13. Well Class alter proposed work: Description Summary of Proposal ŒJ Detailed Operations Proqram D BOP Sketch D 14. Estimated Date for /' May 9, 2005 Commencing Operation: Other IÐ Acid / 6. API Number /' 50-029-23126-00-00 Plugs (md): None Burst Junk (md): None Collapse bottom 11169.5 10863.6 5920.5- 3207.5 I Tubing Grade: 13Cr80 8430 7240 6870 4930 Tubing MD (It): 41 7500 5410 4760 2270 21766 21765 19949 988 21721 Exploratory D DevelopmentOO ServiceD 15. Well Status alter proposed work: Oil ŒJ / GasD PluggedD AbandonedD 16. Verbal Approval: Date: Commission Representative: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. WAG 0 Michael Francis ûNJ '_i.. - ~/J t) ::¡;; - ~ .:: -"~~ (/J ¿~ J 1",-· Commission Use Only Conditions of approval: Notify Commission so that a representative may witness Printed Name Signature Title Phone Petroleum Engineer 564-4240 4/25/05 Mechanciallntegrity Test D GINJO Contact WINJD WDSPLD Prepared by James H. Johnson. Michael Francis I S~S:::(Ot/ Location Clearance 0 Other: BY ORDER OF .L~~~ ~ THE COMMISSION Date: 7'71'7/0::> '----- R E C F p, ¡f<'~': APP 2 5 Z005 Alaska 0,,",,,,, Gons. Commission Anchorage Form 10-403 Revised 11/2004 RBDMS 8Ft MAYO 2 2005 SUBMIT IN DUPLICATE .... . . , TREE: ABB-VGI 5 1/8" 5ksi .. V\ŒLLHEAD: ABB-VGI 13-5/8'. 'Multibowl 5ksi NS21 / 133/8", 68#/ft, L-80, BTC @ 4606' MO ~ 41/2". 12.6#/ft, 13-Cr, Vam-Ace TUBING 10: 3.958". CAPACITY: 0.01522 BBLlFT " 9-5/8" 47# L-80 BTM-C @ 20150' MD >4 ¿£ 4.5" X NIPPLE. @ 21699' MO 3.813" 10 4.5" X NIPPLE, @ 21744' MO ~ 3.813" 10 4.5" XN NIPPLE, @ 21755' MO 3.725" 10 4.5" WLEG, @ 21766' MO ~ 3.85" 10 ~ 7", 26#/ft L-80, Hydril 521 @ 21945' MO -~ Æ!'R:RA 1m 9JliM'\R"J' RF I.ffi AX;log (6'1104) MG..EATiŒ>R*: t>tJœ..~... toAOOt>;tÌ()i>œf...~ perf d;;J(¡¡ rnctìaf AJrf . O1arge: fb,v¡yjet I-M< P..I2OO'> f-€Q l'Y.waboo: "IT"; ~.Ë SA' MmvALM)I~~~I'~1 tl'lTË J 1288 1 6 I Z21ts4". 27M 110001' . 11œ:l QJ1 &1412004 PBTD @ 22268' MO TD @ 22261' MD , ~ ~ DATE 11/12/02 02/25/04 06/21/04 08/18/04 REV. BY JAS JAS EMF EMF COMMENTS ""NS21 Proposed NS21 Proposed Add Perf Add Fish . L V I a:>RIGINAL KB. ELEV = 56' ~B-BF. ELEV = 40.1' CB. ELEV = 15.9' -1 1/2" TRM-4E SSSV @ 988' MD, 985' TVD - 3.812" ID 6.8PPG DIESEL FREEZE PROTECTION AT +/- 4022' TVO (6836'MO) .... 41/2" GLM @ 4504' TVD (8138' MO) w/ 4.62" 10 41/2" GLM @ 6503' TVO (13718'MO) w/ 4.62" 10 ~ - 7" LINER TOP @ 19949' MD . """" 4.5" Fiber Optic Transducer @ 21703' MDelm - 3.958" 10 ~ _ 7" PACKER,13 Cr @ 21721' MO C._ ~ 4.5" LINER TOP @ 21765' MD .... RECEIVED AP..R 2 5 2005 Alaska Oil & Gas Cons. Commissi n Anchorage Fish in hole: Centralizer arm (1" x 7.38") 4.5",12.6#, 13CrVam Ace Northstar WFI I : NS?1 API NO: 50-029-23126-00 BP Exploration (Alaska) . . Date: 01-11-2005 Transmittal Number: #91588NS21 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the Petrotechnical Data Center at (907) 564-4091 or bye-mailing to johnsoih@bp.com \Cb SW Name Date Contractor Top Log Run Depth Bottom Depth Log Type I/NS21 04-17-2004 SCH 7 201 22261 VISION DENSITY NEUTRON; (MD) r!>'Y . NS21 04-17-2004 SCH 7 201 22261 VISION DENSITY NEUTRON; (TV D) NS21 04-17-2004 SCH 7 201 22261 VISION RESISTIVITY; (MD) NS21 04-17 -2004 SCH 7 201 22261 VISION RESISTIVITY; (TVD) \ NS21 11-16-2002 SCH 200 22200 LDWG EDIT OF LWD GR,ARC,CDR / AND IN TIFF FORMAT ON CD ROM; NS08 j 12-06-2004 SCH 111 50 11898 PERFORATING RECORD; . ~Dl-D21 J 12-11-2004 NS09 SCH 12950 13340 PRODUCTiON PROFILE; JOl-frC '\J ,/ NS08 12-07 -2004 SCH 1 11650 11928 PRODUCTION PROFILE; / l/ l£;1- - \ NSOB I 12-07-2004 SCH 1 1500 11400 LEAK DETECTION LOG; <:)1-\ ,¡ ---'·'·-)1 !l C),:%L ~ JúCUv'~~ Please Sign ahdReturn one copy of this transmittal. Thank You, James H. Johnson Petrotechnical Data Center Attn: Esther Fueg MB3-6 Attn: Ken Lemley MB3-6 AUn: Howard Ok land (AOGCC) AUn: Jason Smith (Murphy Exploration Alaska), 'nc Attn: Kristin Dirks (DNR) Attn: Doug Choromanski (MMS) Petrotechnical Data Center LR2-1 900 E. Benson Blvd. PO Box 96612 Anchorage, AK 99519-6612 ... .. STATE OF ALASKA It'.', ALAS~IL AND GAS CONSERVATION CO SSIOf'..f'>, REPORT OF SUNDRY WELL OPERATIONS 2005 1. Operations Performed: Abandon 0 Alter Casing D Change Approved Program D 2, Operator Name: 3. Address: PluQ PerforationsD Perforate New Pool 0 Perforate I!] ..\.~ Stimula~ói h '.' .,. &tW~fEf,ì(ti~ L.,:·:f»:.,;{:?",~f1( WaiverD .? 'Time E~énsionD Re-enter Suspended WellD 5. Permit to Drill Number: 202-2180 6. API Numb, 50~29-23126~ Repair Well 0 Pull TubingO Operation ShutdownO BP Exploration (Alaska), Inc. 4. Current Well Class: Development 00 ExploratoryD P.O. Box 196612 Anchorage, Ak 99519-6612 7. KB Elevation (ft): Stratigraphic 0 9. Well Name and Number: NS21 10. Field/Pool(s): Northstar Field I Badami Oil Pool ServiceD 56.19 8. Property Designation: ADL-312798 11. Present Well Condition Summary: Total Depth measured 22261 feet true vertical 11078.9 feet Effective Depth measured 22258 feet true vertical 11076.0 feet Plugs (measured) Junk (measured) None None Casing Length Size MD TVD Burst Collapse LINER 494 4-1/2" 12.6# 13Cr80 21765 - 22259 10599.4 - 11077.0 8430 7500 LINER 1993 7" 26# L-80 19949 - 21942 9016.8 . 10770.9 7240 5410 PRODUCTION 12115 9-5/8" 47# L-80 43 - 12158 43.0 - 5886.0 6870 4760 SURFACE 13-3/8" 68# L-80 44 - 4606 44.0 . 3209.9 4930 2270 Perforation depth: Measured depth: 22164 - 22184,22184 - 22264 True vertical depth: 10985.15 - 11004.44, 11004.44 - 11081.85 Tubing ( size, grade, and measured depth): 4-1/2" 12.6# 13Cr80 @ 41 21766 Packers & SSSV (type & measured depth): 4-1/2" Baker ZXP Packer 7" Top Packer 4-1/2" TRM-4E SSV 4-1/2" Baker S-3 Perm Packer @ 21765 @ 19949 @ 988 @ 21721 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: Representative Daily Averaae Production or Iniection Data Gas-Met Waler-Bbl Casing Pressure 7.6 1756 780 19.4 2472 780 13 Prior to well operation: Subsequent to operation: Oíl-Bbl 3675 7621 Tubing Pressure 713 772 14. Attachments: ~ 15. Well Class after proposed work: ExploratoryD 16. Well Status after proposed work: OilŒJ GasD DevelopmentŒ] Service 0 Copies of Logs and Surveys run _ Daily Report of Well Operations_ WAG 0 GINJD WINJD WDSPLD Prepared by Garry Catron (907) 564-4657. SUndry Number or NIA if C.O. Exempt: 304~ ~W 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Garry Catron Printed Name Garry Catron Title Production Technical Assistant Signature tI~ ~-1 Uk\G\NAcne 564-4657 Date 2/14/05 RBDMS 6Ft. rES 1 8 2005 Form 10-404 Revised 4/2004 . . NS21 DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY 01/15/05 Perforate 22164'-22184' 6 SPF FLUIDS PUMPED BBLS No Fluids Pumped o I TOTAL Page 1 TREE: ABB-VGI 5 1/8" 5ksi . WELLHEAD: ABB-VGI13-5/8" Multibowl 5ksi NS21 13 3/8", 68#/ft, L-80, BTC @ 4606' MD ~ 41/2", 12.6#/ft, 13-Cr, Vam-Ace TUBING ID: 3.958" . CAPACITY: 0.01522 BBUFT 9-S/8" 47# L-80 BTM-C @ 20150' MD H I 4.S" X NIPPLE, @ 21699' MD 3.813" ID 4.5" X NIPPLE, @ 21744' MD M 3.813" ID 4.5" XN NIPPLE, @ 21755' MD 3.725" ID - 4.S" WLEG, @ 21766' MD ~I 3.8S" ID ~ 7", 26#/ft L-80, Hydril 521 @21945' MD _a fERfCRAl1CN~Rf ÆF lOO: flX;lag (tY1K14) Atn.EATiCP~: ~ Rot« tø RO<IudX>II tara ~ perf data I'1tiaI Rorf - 0Wge; R3wøjet 1M( RJ:m3 H:Q RoneInIIíon 'U'; ¡ SÆJ æ:j N1'I':WALI'.Ð I~·~¡ :1 CATE I . 2~ 6~M -:aæ4 11~ -11Œ}7 Q»1...... tY14WJ4. PBTD @ 22268' MD TD @ 22261' MD -.. J ~ DATE 11/12/02 02/25/04 06/21/04 08/18/04 REV. BY JAS JAS EMF EMF COMMENTS "NS21 \-Jroposed NS21 Proposed Add Perf Add Fish . V I (- M .IGINAL KB. ELEV = 56' -BF. ELEV = 40.1' CB. ELEV = 15.9' "I 1/2" TRM-4E SSSV @ 988' MD, 985' TVD - 3.812" ID 6.8PPG DIESEL FREEZE PROTECTION AT +1- 4022' TVD (6836'MD) ~ 4 1/2" GLM @ 4S04' TVD (8138' MD) wI 4.62" ID ~ 41/2" GLM @ 6503' TVD (13718'MD) wI 4.62" ID ~ - 7" LINER TOP @ 19949' MD 4.5" Fiber Optic Transducer @ 21703' MDelm - 3.958" ID ~_ 7"PACKER,13Cr@21721'MD 4.5" LINER TOP @ 21765' MD II.. Fish in hole: Centralizer arm (1" x 7.38") 4.S". 12.6#, 13CrVam Ace Northstar WFI I : NS?1 API NO: 50-029-23126-00 BP Exploration (Alaska) , . ~~!Æ~E ŒJ} !Æ~!Æ~~~!Æ A 1"4ASIiA OIL AND GAS CONSERVATION COMMISSION Michael Francis Petroleum Engineer BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, Alaska 99519-6612 Re: Northstar NS21 Sundry Number: 304-460 Dear Mr. Francis: ./7 ,-,-, / /} ,< / C ,~-, .- /7 /..---, , ! "- (.~i (.) FRANK H. MURKOWSKI, GOVERNOR 333 W. 7'" AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed fonn. As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. Daniel T. Seamount, Jr. Commissioner lÛoV' DATED thisZ{ day of ~r, 2004 Encl. bp . . ... ,,,,.,,,. --..~ ~...-- ~..,- ~..,-- .....~ ¡t..... ·'j~~I\" ". BP Exploration (Alaska) Inc. 900 East Benson Boulevard P. O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 November 19,2004 Winton Aubert Alaska Oil & Gas Conservation Commission 333 West ih Avenue Suite 100 Anchorage, AK 99501 Dear Winton: Re: Sundry Notice for NS21 to Add Perforations (Ivishak) BP Exploration Alaska, Inc. proposes to add 20' of perforations above the existing perforations in the NS21 well. These perforations are expected to increase oil production from this well. The procedure includes the following major steps: Type Slickline Work Description Pull SSSV, Drift/tag wi dummy gun Add 20' of Ivishak Perforations from: 22,164' - 22,184' MDrkb (10,985' - 11,004' TVDrkb) Run SSSV / Electric Line Slickline Sincerely, ¿~ . I ------ c1p.J . .. ~lN~ ~ Mic ael J. Frfcncis, P.E. Senior Petroféum Engineer BPXA, ACT, Northstar 0" L. -'... I. r. .. ¡ , r\ Iv ì L Wt.:,!t- \ t 2 L 1"2004 . STATE OF ALASKA _ ALASK~IL AND GAS CONSERVATION CO~SION APPLICATION FOR SUNDRY APPROVAL 20 AAC 25.280 1. Type of Request: D D D Perforate[¡ WaiverD Annular Disposal 0 Abandon Suspend Operation Shutdown Alter Casing D Repair Well D Plug Perforations D StimulateD Time ExtensionD OtherD Change Approved Program 0 Pull Tubing 0 Perforate New Pool D Re-enter Suspended Well 0 2. Operator Name: BP Exploration (Alaska), Inc. 4. Current Well Class: Development ŒJ /ÉxPloratory D StratigraphicD Service D 9. Well Name and N~er: NS21 10. Field/Pool(s): Northstar Field / Northstar Oil Pool PRESENT WELL CONDITION SUMMARY Effective Depth MD (ft): Effective Depth TVD (ft): 22257 11018.9 S~e MD nD 3. Address: P.O. Box 196612 Anchorage, Ak 99519-6612 7. KB Elevation (ft): 56.19 KB 8. Property Designation: ADL-312798 11. Total Depth MD (ft): 22293 Casing Total Depth TVD (ft): 11110.0 Length Liner 1993 7" 26# L-80 Liner 494 4-1/2" 12.6# 13Cr80 Production 12115 9-5/8" 47# L-80 Surface 4562 13-3/8" 68# L-80 Perforation Depth MD (ft): I Perforation Depth TVD (ft): 22184 - 22264 11004.4 - 11081.9 Packers and SSSV Type: 4-1/2" Baker S-3 Perm Packer 4-1/2" Baker ZXP Packer 4-1/2" TRM·4E SSV 7" Liner Top Packer 12. Attachments: Description Summary of Proposal ŒI top bottom top 19949 21942 21765 22259 43 12158 44 4606 I Tubing Size: 4.5 " 12.6 # Packers and SSSV MD (ft): bottom 10770.9 7240 11077.0 8430 5886.0 6870 3209.9 4930 I Tubing Grade: ITubing MD (ft): 13Cr80 41- 9016.8 10599.4 43.0 44.0 5. Permit to Drill NJ,wnber: 202·2180 ,/ 6. API Number /' 50-029-23126-00-00 Plugs (md): None Burst Junk (md): None Collapse 5410 7500 4760 2270 21766 21721 21765 988 19949 Detailed Operations Program D BOP Sketch D 13. Well Class after proposed work: ExploratoryD DevelopmentŒl ServiceD 14. Estimated Date for Commencing Operation: 16. Verbal Approval: Commission Representative: December 2, 2004 15. Well Status after proposed work: Oil ŒI /GasD WAG D GINJD Date: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Printed Name Signature Michael Francis Title ~¿J-.¿1LÞ d ~4V¡.';1 J ¡J, ¿ . Phone Commission Use Only Petroleum Engineer 564-4240 Conditions of approval: Notify Commission so that a representative may witness Plug Integrity 0 BOP TestD Mechanciallntegrity Test D Location Clearance 0 Other: S.'soq..", FO~q.;::td ~O.{ . App=edby 1J~~y PluggedD AbandonedD WINJD WDSPLD Prepared by Garry Catron 564-4657. Michael Francis 11/18/04 I SUndry. Number:. . ::? 04- - LI ~~~~g~~~~ION Date: / 1/2!t! 4- r', l! ~ ¡ 1;...". RBDMS BFL NOV 3 0 2004 Form 1 0-403 Revised 06/2004 SUBMIT IN DUPLICATE . '. TREE~ ABB-VGI 5 1/8" 5ksi . WELLHEAD: ABB-VGI13-5/8" Multibowl5ksi NS21 133/8", 68#/ft, L-80, BTC @ 4606' MO ... 41/2", 12.6#/ft, 13-Cr, Vam-Ace TUBING 10: 3.958" . CAPACITY: 0.01522 BBUFT 9-5/8" 47# L-80 BTM-C @ 20150' MD ~ 4.5" X NIPPLE, @ 21699' MO 3.813" 10 4.5" X NIPPLE, @ 21744' MO ~ 3.813" 10 4.5" XN NIPPLE, @ 21755' MO 3.725" 10 4.5" WLEG, @ 21766' MO ~ 3.85" 10 ~ 7", 26#/ft L-80, Hydril 521 @ 21945' MD -. ~1iaIISJ\4\N\Rf ÆF LOO: I'1:CloJ¡ {&f¡(4) A.N2!EAT1t:Þff:tl'o ~ ~(¡( 10 A'oOOctirn !:Bfa' ~ perf dOOI IOOa! Roof - 01ar¡¡<r Rwerjet rM<Rt'I"Œ I-EQ R'm'nmrr.zr; ¡..SIZE............¡· Gf.'.·..· ·....M1RJ............··Al.W I ~.......'.Q.. ~·~.·...D.·.·.·.·.·I.·..:w... ~...$q¡:.....¡ m )!(....1F......J 2.00 " 721M - 222M 11!m - 11œ2' Cþ! !V1>1lm4 , PBTO @ 22268' MO TO @ 22261' MO .. DATE 11/12/02 02/25/04 06/21/04 08/18/04 REV. BY JAS JAS EMF EMF COMMENTS "NS21 Proposed NS21 Proposed Add Perf Add Fish . 41GINAL KB. ELEV = 56' -BF. ELEV = 40.1' B. ELEV = 15.9' 1 1/2" TRM-4E SSSV @ 988' MO, 985' TVO - 3.812" ID 6.8PPG OIESEL FREEZE PROTECTION AT +/- 4022' TVD (6836'MO) ... 41/2" GLM @ 4504' TVD (8138' MD) w/ 4.62" 10 41/2" GLM @ 6503' TVD (13718'MO) w/ 4.62" ID ~ - 7" LINER TOP @ 19949' MD V I 4.5" Fiber Optic Transducer @ 21703' MOelm - 3.958" 10 ~_ 7"PACKER,13Cr@21721'MD r_ ~ 4.5" LINER TOP @ 21765' MO ... Fish in hole: Centralizer arm (1" x 7.38") ~ 4.5",12.6#, 13Cr Vam Ace Northstar WFI I : NS?1 API NO: 50-029-23126-00 BP Exploration (Alaskå) . . ofl)/- /1 ~ 0 Date: 1.1-11-2004 ~4Ï~ ...dlv/'i TransmIttal Number: #91588 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the Petrotechnical Data Center at (907) 564-4091 or by e-mailingtojohnsojh@bp.com Top SW Name Date Contractor Log Run Depth NS21 06-01-2004 SCH 1 0 (NS31 )L)( .- 0"0 NS31 09-26-2004 PDS 1 Bottom Depth Log Type 22244 PDC JEWELRY LOG; GAMMA RAY; CASING COLLAR LOG; LDWG EDIT OF JEWELRY PDC GAMMA RAY; CD ROM; 10776 LEAK DETECTION LOG; ~t... 2f1 o 08-19-2004 PDS 1 o 10752 FLUID LEVEL X-Y CALIPER; p,ease~i~4(~~G (!~ Thank You, James H. Johnson Petrotechnical Data Center Attn: Esther Fueg MB3-6 Attn: Ken Lemley MB3-6 Attn: Howard Okland (AOGCC) Attn: Jason Smith (Murphy Exploration Alaska), Inc Attn: Kristin Dirks (DNR) Attn: Doug Choromanski (MMS) r< f< NOV 12"zoot fJ:t . ("1 'J~' ~~~, i.., ~~.¡.Uí Petrotechnical Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 A STATE OF ALASKA . ALASKJ~'L AND GAS CONSERVATION COM . ION WELL COMPLETION OR RECOMPLETION REPORT AND LOG 1a. Well Status: 1m Oil 0 Gas 0 Plugged 0 Abandoned 0 Suspended 0 WAG 20AAC 25.105 20AAC 25.110 CASING, LINER AND CEMENTING RECORD Se:'1"tIN()DePTHMO SrnlNGDePTH ntO BQT1"OM Top "BoTtoM 201' Surface 201' 4606' Surface 3190' 20150' Surface 9165' 21945' 9009' 10773' 22261' 10598' 11078' o GINJ 0 WINJ 0 WDSPL No. of Completions 2. Operator Name: BP Exploration (Alaska) Inc. 3. Address: P.O. Box 196612, Anchorage, Alaska 99519-6612 4a. Location of Well (Governmental Section): Surface: 1249' NSL, 646' WEL, SEC. 11, T13N, R13E, UM Top of Productive Horizon: 2095' NSL, 3593' WEL, SEC. 33, T14N, R13E, UM Total Depth: 2106' NSL, 3604' WEL, SEC. 33, T14N, R13E, UM 4b. Location of Well (State Base Plane Coordinates): Surface: x- 659827 y- 6031021 Zone- ASP4 TPI: x- 646070 y- 6042147 Zone- ASP4 Total Depth: x- 646058 y- 6042157 Zone- ASP4 18. Directional Survey 1m Yes 0 No 21. Logs Run: GR , DIR . GYRO, PWD , RES, NEU , DEN 22. 20" 13-3/8" 9-5/8" 7" 169# 68# 47# 26# 12.6# X-56 L-80 L-80 L-80 13Cr Surface Surface Surface 19949' 21765' 4-1/2" 23. Perforations open to Production (MD + TVD of To,e and Bottom Interval, Size and Number; if none, state' none"): 2-7/8" Gun Diameter, 6 SPF MD TVD MD TVD 22184'-22264' 11003'-11081' 26. Date First Production: June 15, 2004 Date of Test Hours Tested PRODUCTION FOR TEST PERIOD .. Flow Tubing Casing Pressure CALCULATED ....... Press. 24-HoUR RATE""'" One Other 5. Date Comp., Susp., or Aband. 6/13/2004 6. Date Spudded 11/16/2002 7. Date T.D. Reached 4/1612004 8. KB Elevation (ft): 56.19' 9. Plug Back Depth (MD+ TVD) 22258' + 11074 10. Total Depth (MD+ TVD) 22261 + 11078 11. Depth where SSSV set (Nipple) 988' MD 19. Water depth, if offshore MSL 20" 16" 12-1/4" 8-1/2" 6-1/8" SIZE 4-1/2", 12.6#, 13Cr80 ¡¡1'14 ::tlJ 1 b. rWèlt.CIå$~: 1m Developmet¢ D Exploratory o Stratigraphic 0 Service 12. Permit to Drill Number 202-218 13. API Number 50- 029-23126-00-00 14. Well Name and Number: NS21 15. Field I Pool(s): Northstar Unit Ft Ft 16. Property Designation: ADL 312798 17. Land Use Permit: 20. Thickness of Permafrost 1545' (Approx.) Driven 837 sx PF 'L', 498 sx Class 'G' 1452 sx Econolite, 700 sx Class 'G' 456 sx Class 'G' 100 sx Class 'G' DEPTH SET (MD) 21769' PACKER SET (MD) 21721' DEPTH INTERVAL (MD) AMOUNT & KIND OF MATERIAL USED Freeze Protected with 470 Bbls Diesel PRODUCTION TEST Method of Operation (Flowing, Gas Lift, etc.): Flowing OIL-BBL GAs-McF WATER-BBL CORE DATA Brief description of lithology, porosity, fractures, apparent dips and presence of oil, gas or water (attach separate sheet, if necessary). $ub.rollçº.!~LChips; if none, state "none". , CC;\,;uLr:';');Jtil Not ~:!)~ "J ¡ VERIFIED 71 t ~.,,,J OIL -BBL 27. GAs-McF W A TER-BBL R~f'US Rft Form 10-407 Revised 12/2003 nn¡0'fi1fiL cob~JÊb ~r-lB\¡~~¡~ .. CHOKE SIZE I GAS-OIL RATIO OIL GRAVITY-API (CORR) NO" 0 2 ~ý 28. GEOLOGIC MARKERØ 29. aRMATION TESTS NAME MD TVD Include and briefly summarize test results. List intervals tested, and attach detailed supporting data as necessary. If no tests were conducted, state "None". TSGR SGC SGBU SGBM SGA TSHU TSHA TSHB TSHC TSHD TSAD TZE TZE TZC3 TZC2 21939' 21941' 21964' 21989' 21996' 22026' 22027' 22077' 22086' 22121' 22131' 22133' 22163' 22193' 22238' 10767' 10769' 10792' 10816' 10823' 10852' 10853' 10900' 10909' 10943' 10952' 10954 ' 10983' 11012' 11056' None 30. List of Attachments: Summary of Daily Drilling Reports, Well Schematic Diagram, Surveys, Post Rig Summary and a Leak-Off Test Summary. 31. I hereby certify that the foregoing is true and correct to the best of my knowledge. Signed sonctf~;~~~~~c Title Technical Assistant Date l C)·- 2£ -Lì2i NS21 --. 202-218 Prepared By Name/Number: SondraStewman, 564-4750 Well Number Drilling Engineer: Bob Clump, 564-4672 Permit No. / Approval No. INSTRUCTIONS GENERAL: This form is designed for submitting a complete and correct well completion report and log on all types of lands and leases in Alaska. ITEM 1a: Classification of Service Wells: Gas Injection, Water Injection, Water-Alternating-Gas Injection, Salt Water Disposal, Water Supply for Injection, Observation, or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. ITEM 4b: TPI (Top of Producing Interval). ITEM 8: The Kelly Bushing elevation in feet above mean low low water. Use same as reference for depth measurements given in other spaces on this form and in any attachments. ITEM 13: The API number reported to AOGCC must be 14 digits (ex: 50-029-20123-00-00). ITEM 20: True vertical thickness. ITEM 22: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. ITEM 23: If this well is completed for separate production from more than one interval (multiple completion), so state in item 1, and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). ITEM 26: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-In, or Other (explain). ITEM 27: If no cores taken, indicate "None". ITEM 29: List all test information. If none, state "None". Form 10-407 Revised 12/2003 Submit Original Only TREE: ABB-VGI5 1/8" 5ksi . WELLHEAD: ABB-VGI 13-5/8" , Multìbowl 5ksi NS21 13 3/8", 68#/ft, L-80. BTC @ 4606' MD ~ 41/2", 12.6#/ft, 13-Cr. Vam-Ace TUBING ID: 3.958" . CAPACITY: 0.01522 BBLlFT 9-5/8" 47# L-80 BTM-C @ 20150' MD ß- 4.5" X NIPPLE, @ 21699' MD 3.813" ID 4.5" X NIPPLE,@21744'MD _~ 3.813" ID 4.5" XN NIPPLE, @ 21755' MD 3.725" ID 4.5" WLEG, @ 21766' MD ~ 3.85" ID ~ 7", 26#/ft L-BO, Hydril 521 @ 21945' MD -. ~r1C»laMH\RY ÆF LOO: AX: L<v (611.c4) I\IoU..EATt'CPfm": N::4¢: Rol... tv A'«b;;tio" alfO!' ~ p!!rl d;¡ta ntiaI Rwf - Ö'targe: R>wotjet ~M< p~ ~ RJoetratíon: :0'; ISZEI !!ifF! ~ALM) I~'~I':V~I ,,~~, I 2.116 I) 221M· 212M I1IDf· Hœ7 l~:J~.:::J PBTD @ 222ð8" MD TD @ 22261' MD , i ~ DATE 11/12/02 02/25/04 06/21/04 08/18/04 COMMENTS "NS21 Proposed NS21 Proposed Add Perf Add Fish REV. BY JAS JAS EMF EMF . ~ I (- ~ âRIGINAL KB. ELEV = 56' (W':-BF. ELEV = 40.1' CB. ELEV = 15.9' 4 1/2" TRM-4E SSSV @ 988' MD, 985' TVD - 3.812" ID 6.8PPG DIESEL FREEZE PROTECTION AT +/- 4022' TVD (6836'MD) II. 4 1/2" GLM @ 4504' TVD (8138' MD) w/ 4.62" ID 41/2" GLM @ 6503' TVD (13718'MD) w/ 4.62" ID ~ - 7" LINER TOP @ 19949' MD -~ 4.5" Fiber Optic Transducer @ 21703' MDelm - 3.958" ID ;¡ _ 7" PACKER,13 Cr @ 21721' MD 4.5" LINER TOP @ 21765' MD II. Fish in hole: Centralizer arm (1" x 7.38") 4.5", 12.6#, 13Cr Vam Ace Northst~r WFI L: NS71 API NO: 50-079-73126-00 BP Exploration (Alaska) Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 11/16/2002 00:00 - 01 :30 1.50 MOB P PRE PJSM for rig move at Pre-tour meeting. -Prep for rig move. -Open electrical breaker, function moving system, prep cellar, etc. 01 :30 - 03:00 1.50 MOB P PRE Move rig from NS-19 to NS-21. Shim up SE corner. Run stand of 5" DP through bushings. Level up more. Note: Accept rig @ 0300 hrs. 03:00 - 05:00 2.00 RIGU P PRE RU. Berm rig, set steps, and landings. Clean cellar. 05:00 - 07:00 2.00 RIGU P PRE NU surface riser. Install turn buckles, floor track, and mousehole. -Test ESD. 07:00 - 08:00 1.00 RIGU P PRE Mix mud, c/o liners on #1 pump, finish placing screens on shakers. -Test gas alarms. - Helicopters not flying due to low ceiling (No relief for Roustabouts, and Loader Operators -- Roustabout Pusher taking up the slack.) 08:00 - 10:00 2.00 RIGU P PRE Bring up BHA, gyro tools, & Schlumberger sheaves to rig floor. 10:00 - 11 :00 1.00 RIGU P PRE Service Top Drive. 11 :00 - 12:00 1.00 RIGU P PRE PJSM. BHA#1 MU. 12:00 - 13:00 1.00 RIGU P PRE PJSM for GYRO RU. PRE-SPUD MEETING. 13:00 - 14:00 1.00 DRILL P SURF MU BHA#1. 14:00 - 14:45 0.75 DRILL P SURF Ream to bottom of conductor@ 201' md. Drill ahead 16" hole to 217' md. 14:45 - 15:00 0.25 DRILL P SURF Run Gyro. At 201' md: Azimuth= 295.25 deg /Ine!= 1.97 deg 15:00 - 16:30 1.50 DRILL P SURF Drill ahead from 217' to 330' md. Pump sweep. 16:30 - 17:00 0.50 DRILL P SURF POOH f/ MWD - BHA#2. 17:00 - 19:00 2.00 DRILL P SURF MU BHA #2. 19:00 - 19:30 0.50 DRILL P SURF RIH wI 5" HWDP. 19:30 - 19:45 0.25 DRILL P SURF Drill ahead 16" hole f/ 330' to 358' md. Pump red mud sweep. 19:45 - 20:00 0.25 DRILL P SURF Run Gyro. At 350' md: Inc= 2.13 deg, Azmth= 302.86 deg, DLS= 0.50 deg/100' 20:00 - 20:30 0.50 DRILL P SURF Drill ahead 16' hole f/ 358' to 460' md. Pump red mud sweep. 20:30 - 20:45 0.25 DRILL P SURF Run Gyro. At 450' md: Inc= 2.24 deg, Azmth= 321.94 deg, DLS= 1.01 deg/1 00'. 20:45 - 21:15 0.50 DRILL P SURF Drill ahead 16" hole f/460' to 549' md. Pump red mud sweep. 21:15 - 21:30 0.25 DRILL P SURF Run Gyro. At 500' md: Inc= 2.06 deg, Azmth= 334.94 deg, DLS= 1.03 deg/100'. 21:30-22:15 0.75 DRILL P SURF Drill ahead 16" hole f/549' to 639' md. Pump red mud sweep. - Out of gravels at -500' md. 22:15 - 22:30 0.25 DRILL P SURF Run Gyro. At 600' md: Inc= 3.84 deg, Azmth= 335.72 deg, DLS= 1.92 deg/100'. 22:30 - 00:00 1.50 DRILL P SURF Drill ahead 16" surface hole f/ 639' to 770' md. Drilling Parameters: Total Flow:: 710 gpm w/1150 psig. WOB= 15 Klbs. 30 rpm w/5K-lbs torque. ROP from 170 fph Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 11/16/2002 22:30 - 00:00 1.50 DRILL P SURF to 300 fph. MW= 8.9 ppg w/134 vis. Will increase flowrate as formations get more competent and reduce risk of washing away angle. 11/17/2002 00:00 - 12:00 12.00 DRILL P SURF Drill ahead 16" surface hole from 770' md to 1560' md. - Confirmed MWD surveys with Gyro. Final Gyro survey @ 1455' md (1435.2' TVD): Inc121.76 deg, Azimuth 323.59 deg, DLS 3.86 deg/1 00'. - Drilling Stats: ROP 100-400 fph. WOB = 35 K Ibs. 30 rpm w/ 6 K-Ibs torque. Total Flow of 760 gpm w/1500 psig. 12:00 - 00:00 12.00 DRILL P SURF Drill and sliding in build section of 16" surface hole from 1560' md to 3100' md. - ROP 100- 400 fph. - Increase total flow from 760 gpm to 1060 gpm in 100 gpm increments. No screen blinding occuring. Flow running between 58-62%. - Pumping 25 bbls hi vis red mud sweeps every 400'. Adding Condet and BDF-263 for clay inhibition. Maintaing 9.1 ppg MW w/ YP>40, FV 100-125. 11/18/2002 00:00 - 17:30 17.50 DRILL P SURF Drill ahead 16" surface hole from 3100' md to casing pt 4621' md. - At 3400' md, trending to drop 2 deg/100' while rotating. Continuous inclination showing drop on attempts to slide also. Reduce flow to from 1050 to 800 gpm and get back on track- able to build again. - At 3615' md, start increasing total flow again. DD able to maintain inclination at higher flow rates. Work rate up to 920 gpm - At 3862', lost pulsation dampner on #2 pump and unable to maintain GR signal -- still able to pump up survey at connection. -- Stagger pumps 125 spm and 75 spm on pumps 1 and 2, respectively. Regained GR signal. ROP averaging 160 fph -- slowed down in SV as is typical. 17:30 - 20:00 2.50 DRILL P SURF At TD, pump 100 bbls red mud sweep surface to surface. Large amounts of excess returned with sweep. Continue cirulating another bottoms up. Returns cleaned up significantly. 20:00 - 22:30 2.50 DRILL P SURF Wiper trip to 540' md -- No troubles. Max drag 25-40 Klbs through slides. Hole in good condition. Stabilizers are evidently balled wI clay- some swab occuring. 22:30 - 00:00 1.50 DRILL P SURF RIH to 4000' md by midnight -- no hole trouble. 11/19/2002 00:00 - 01 :30 1.50 DRILL P SURF TIH on wiper trip to 4621' md -- hole in good shape. - Avg SOW was 115 to 125K. SOW reduced to 80K going through 2 deg dogleg @ 3300' md. Wiped. 01 :30 - 04:00 2.50 DRILL P SURF Pump 130 bbl red mud sweep and CBUx2 (21500 stks). - Hole unloaded substantial amount of wallcake and cuttings from the start of circulation. - Cleaned up noticeably during second bottoms up. 04:00 - 04:30 0.50 DRILL P SURF Montior well, POOH 5 stands and pump dry job. B/D top drive. Printed; 4/30/2004 1 :42;55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 11/19/2002 04:00 - 04:30 04:30 - 06:30 0.50 DRILL P 2.00 DRILL P SURF SURF 06:30 - 07:30 1.00 DRILL P SURF 07:30 - 08:00 0.50 DRILL P SURF 08:00 - 10:30 2.50 DRILL P SURF 10:30 - 11 :00 0.50 DRILL P SURF 11 :00 - 13:00 2.00 CASE P SURF 13:00 - 14:00 1.00 CASE P SURF 14:00 - 22:00 8.00 CASE P SURF 22:00 - 22:30 0.50 CASE P SURF 22:30 - 23:00 0.50 CASE P SURF 23:00 - 00:00 1.00 CASE P SURF 11/20/2002 00:00 - 01 :30 1.50 CASE P SURF 01 :30 - 05:30 4.00 CEMT P SURF - PUW 165 & SOW 135K. POOH to HWDP. - Noticeable amount of clay on top of all tool joints. - 30K overpull pulling up through dog leg at 3300' md. - Overall drag was 15-25K compared to 25-40K for first wipe (-37% reduction in drag). POOH with 9 stands of HWDP + Jars. Clean up rig floor and set up to handle BHA. PJSM -- LD BHA. - Noticebly large amount of clay on top of all stabilizers -- this is pretty typical. Clean rig floor and put away bha handling tools. PJSM -- RU Casing Running Equipment and Franks Fill-up Tool. MU Float Track. Engaged Fill-Up Tool and Checked Floats. - Float track = FS, Jts 1 &2, FC and Jt 3 all Bakerlocked. - Circ 300 strokes through FE. RIH with 107 jts of 13-3/8" 68# L80 Buttress Casing - (110 joints total). - Casing stacked to 80K (top drive weight) for 8 joints while running through the bottom of the build section -- PU and worked through. Stacked up twice while running through dogleg @ 3300' md. - No problems noted running remaining joints. MU Hanger & both sections landing joint -- land hanger. - No Fill and No Problems. - Did not require washing to bottom. RD Franks Fill-Up Tool, BID top drive and MU cement head. Establish Circ @ 0.5 bpm and gradually inc rate to 10 bpm. - No problems packing off and no losses. Circulate 12500 strokes total in prepartion for cement job. - Final circulation rate of 11 bpm @ 510 psig wI no losses. - PJSM for cement conducted wI rig personnel. Discussed bumping plug wI brine, Citric acid additions, and notify control room. Pressure test cement lines to 3000 psig. Pump Cement Job as per plan: 1) Pump 75 bbls 10.5 ppg Alpha Spacer. 2) Drop bottom plug. 3) Mix and pump 620 bbls (837 sxs) of 10.7 ppg Lead cement - 200% excess. Pump rate average 7 bpm wI 150 psig and 35% returns - no losses. 4) Switch to tail cement 102 bbls (498 sxs) @ 15.9 ppg - 50% excess. With 50 bbls tail cement pumped lost returns briefly on packoff. Regain full returns after pressuring up. Continue pumping tail. 5) Drop top plug and flush lines wI 25 bbls Sea water from HALCO. 6) Displace wI rig pump @ 9.5 bpm to 10 bpm wI 9.4 ppg NACL brine. 7) Slow displacement rate to 8 bpm @ 4478 strokes when ALPHA spacer back to surface. Alpha spacer thickness causing backup on drag-chain. Jet with water periodically - Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 11120/2002 01 :30 - 05:30 4.00 CEMT P SURF levels are dropping. 8) At 4500 strokes, good lead cement to surface. Increase rate to 9 bpm. 9) At 6200 strokes, slow rate to 5 bpm wI 980 psig circulation. 10) Bump plug to 500 psig over wI 6445 strokes (96.5%)- 646 bbs on HALCO meter. Hold for 10 min pressure test. 11) Bleed off. Check floats. Estimated 200 bbls Lead cement back to surface. 05:30 - 06:00 0.50 CEMT P SURF BD lines. Rig down cement head. Flush and drain stack. 06:00 - 07:45 1.75 CEMT P SURF Break pup jt from Landing jt. 07:45 - 09:00 1.25 CEMT P SURF Rig down casing running equipment. Clean Floor. 09:00 - 09:30 0.50 CEMT P SURF Change bails & elevators. 09:30 - 12:00 2.50 CEMT P SURF PJSM. Slip & cut drilling line. 12:00 - 15:00 3.00 CASE P SURE RIH wI Jars, TIW, HWDP, and 5 stands of DP to displace brine to make room for FP. 15:00 - 15:30 0.50 CASE P SURE Service Top Drive and Drawworks. 15:30 - 16:30 1.00 CASE P SURE LD landing joint. 16:30 - 17:00 0.50 CASE P SURE Clear & clean rig floor. 17:00 - 20:30 3.50 WHSUR P SURE ND riser. NU wellhead, Test aDC to 1200 psig, intstall valves and seep. 20:30 - 21 :30 1.00 WHSUR P SURE Fill well wI 20 bbls Diesel forI 134' md of FP. 21 :30 - 22:00 0.50 WHSUR P SURE Set tubing handger and test to 5000 psig for 10 min. 22:00 - 00:00 2.00 WHSUR P SURE NU and test tree. Release Rig at Midnight. 3/4/2004 00:00 - 03:00 3.00 MOB P PRE - Move rig to NS21. 03:00 - 08:00 5.00 MOB P PRE - Burm and shim rig. Accept rig at 0800 hrs March 4, 2004 08:00 - 11 :00 3.00 MOB P PRE - Chink rig. - Tighten Deadman. - Re-install stairs. - Rig up lines - Spool 2500' 5/8" line on draw works. 11 :00 - 12:00 1.00 RIGU P PRE - Cut off drilling line. 12:00 - 00:00 12.00 RIGU P PRE - Removed 30' of drilling line core and replaced with 5/8" line. Braze weld every 2 feet. - Feed line through sheave. - Spool 1.3/8" line onto drawworks. - Cut 5/8" line and spool off drawworks. 3/5/2004 00:00 - 00:30 0.50 RIGU P PRE Continue spooling off 5.8" string up line from drawworks. 00:30 - 02:00 1.50 RIGU P PRE Slip on 1.3/8" drilling line. 02:00 - 04:00 2.00 RIGU N WAIT PRE Load and prep 5.7/8" drill pipe in pipe shed. .. Polar Bear on island, no foot traffic outside rig or in cellar (cellar doors not closed due to tree in doorway). 04:00 - 06:00 2.00 RIGU P PRE Production bleeding down wells in sub. Prepping cellar for BOP lift and rig leveling. 06:00 - 08:30 2.50 RIGU P PRE Change out production sweeps on annulus. 08:30 - 11 :00 2.50 RIGU P PRE ND dry hole dry. Thaw ice plug from top of BPV. Level rig. .. While positioning rig floor, pulled air boot from flowline. Will repair once rig has been repositioned. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/5/2004 11 :00" 15:30 4.50 BOPSUF P PRE PJSM " NU BOPE. PJSM " Change upper rams from 2.7/8" x 5" to 4.1/2" x 7" 15:30 - 17:30 2.00 BOPSUF P PRE PJSM " Pick up landing joint and pull hanger. Install test plug. 17:30 - 23:00 5.50 BOPSUP P PRE PJSM "Test BOPE to 250 psi low 14800 psi high. .. AOGCC rep Chuck Sheive to witness test. 23:00 " 00:00 1.00 BOPSUP P PRE Pull test plug, drain stack, and blow down lines. 3/6/2004 00:00 " 01 :00 1.00 MOB N RREP PRE PJSM -- Prep for rig floor skid. 01 :00 " 01 :30 0.50 MOB N RREP PRE Skid rig floor 1 foot to the East. 01 :30 " 02:30 1.00 MOB N RREP PRE Rig down Koomy lines, choke and kill lines, and turn buckles. 02:30 " 04:00 1.50 MOB N RREP PRE PJSM on rig move. Bleed wells in cellar, (valve frozen). 04:00 " 06:00 2.00 MOB N RREP PRE Move I spot rig over stack. 06:00 " 07:00 1.00 MOB N RREP PRE Roustabout changeout. Break for lunch I warmup. 07:00 - 11 :00 4.00 MOB P PRE Repair flow line boot. Move drill pipe in derrick. Rig down floor equipment for installing riser. 11 :00 - 12:00 1.00 MOB P PRE PJSM. Install riser. 12:00 - 13:00 1.00 MOB P PRE Nipple up BOP koomey lines and mousehole. 13:00 - 14:30 1.50 MOB P PRE PJSM. Test choke and kill line. Blow down all lines 14:30 - 15:30 1.00 MOB P PRE PJSM. Pick up test joint and install wear ring. 15:30 - 17:00 1.50 RIGU P PRE PJSM. RIH with 5" non-grooved DP from off driller's side .. Closed TIW to displace 35 bbls of diesel freeze protection fluid. .. Trip tank covered and proper ventilation to minimize fumes. .. Benzene levels monitored by ACS. .. Trip sheet accurate. 17:00 - 18:00 1.00 RIGU P PRE Empty trip tank. Clean and fill with 9.4 ppg brine for POOH. 18:00 " 21 :00 3.00 RIGU P PRE POOH with 5" DP. .. Rack on driller's side. .. Reduce make up torque from 34k to 30k ftlbs. .. Make up with Kover Kote thread compound. .. Trip sheet accurate. 21 :00 - 22:30 1.50 RIGU P PRE RIH with non-grooved 5" open ended DP from off driller's side. 22:30 - 00:00 1.50 RIGU P PRE POOH with 5" DP. .. Rack on off driller's side. .. Reduce make up torque from 34k to 30k ftlbs. .. Make up with Kover Kote thread compound. .. Trip sheet accurate. 3/7/2004 00:00 - 02:00 2.00 RIGU P PRE POOH with 5" DP. .. Rack on off driller's side. .. Reduce make up torque from 34k to 30k ftlbs. .. Make up with Kover Kote thread compound. .. Trip sheet accurate. 02:00 - 04:30 2.50 RIGU P PRE PJSM. Move 5" DP from driller's side to off driller's side to make room Printed: 4/30/2004 1:42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/7/2004 02:00 - 04:30 2.50 RIGU P PRE for the 5-7/8" DP. 04:30 - 08:30 4.00 RIGU P PRE Clear floor and rig up 5-7/8" DP handling equipment. .. While rigging up equipment, found that the elevators were too large for the eyes on the 350 ton short bails. Change out bails to 350 ton long bails for drill pipe management. 08:30 - 12:00 3.50 RIGU P PRE PJSM. RIH with 5-7/8" DP from pipe shed. .. Drift. .. Torque to 51 k ftlbs. .. Grant Prideco hand on floor for consultation. 12:00 - 13:00 1.00 RIGU P PRE PJSM. Service top drive and drawworks. 13:00 - 17:30 4.50 RIGU P PRE PJSM. RIH with 5-7/8" DP from pipe shed. .. Drift. .. Torque to 51k ftlbs. .. Grant Prideco hand on floor for consultation. 17:30 - 19:00 1.50 RIGU N RREP PRE Repair upper door hinge on iron roughneck. 19:00 - 20:30 1.50 RIGU P PRE Continue to RIH with 5-7/8" DP from pipe shed. .. 135 total joints. .. Drift. .. Torque to 51k ftlbs. .. Grant Prideco hand on floor for consultation. 20:30 - 00:00 3.50 RIGU P PRE PJSM I HACL. POOH with 5-7/8" DP and rack back on driller's side. .. Grant Prideco hand on floor for consultation. 3/8/2004 00:00 - 01 :00 1.00 RIGU P PRE PJSM. POOH with 5-7/8" DP and rack back on driller's side. .. Grant Prideco hand on floor for consultation. .. Trip sheet accurate. 01 :00 - 04:00 3.00 RIGU P PRE PJSM. RIH with 5-7/8" DP from pipe shed. .. Drift on skate. .. Torque to 51 k ftlbs. .. Trip sheet accurate. 04:00 - 05:00 1.00 RIGU P PRE PJSM. POOH with 5-7/8" DP and rack back on driller's side. .. Trip sheet accurate. 05:00 - 06:30 1.50 RIGU P PRE PJSM. Change out bails and elevators for 5" DP. 06:30 - 09:30 3.00 RIGU P PRE RIH with 5" DP from pipe shed. .. Drift on skate. .. Torque to 30k ftlbs. .. Trip sheet accurate. 09:30 - 10:00 0.50 RIGU P PRE Calibrate block height indicator for Schlumberger monitoring system. 10:00 -11:00 1.00 RIGU P PRE POOH with 5" DP to fill derrick. .. Trip sheet accurate. 11 :00 - 12:00 1.00 RIGU P PRE Clear floor. Service top drive. 12:00 - 13:00 1.00 RIGU P PRE Replace weight indicator plate for 12-lines. 13:00 - 14:30 1.50 CEMT P SURF Make up BHA #3,12.1/4" drilling BHA. .. Rotary steerable. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 318/2004 13:00 - 14:30 1.50 CEMT P SURF .* ARC I MWD with filter. 14:30 - 15:30 1.00 CEMT P SURF Test MWD tools. 15:30 - 17:00 1.50 CEMT N DFAL SURF Change out MWD. Blow down all surface circ lines. 17:00 - 18:00 1.00 CEMT N DFAL SURF Continue to make up BHA #3. 18:00 - 19:00 1.00 CEMT N DFAL SURF Stand back BHA#3. .. Top stablilizer caught in wear ring. Cannot pass through. 19:00 - 19:30 0.50 CEMT N DFAL SURF Pull wear ring. .* No significant damage. Marks indicating where the stabilizer was hanging up. 19:30 - 22:30 3.00 CEMT P SURF Continue to make up BHA #3. .. Changed out stabilizer to 12-1/8" gauge, rather than new FG which is a bit over gauge (approx 12-1/2" aD). 22:30 - 00:00 1.50 CEMT P SURF RIH with 5" DP from pipe shed. ** Drift on skate. .* Torque to 30k ftlbs. .* Trip sheet accurate. 3/9/2004 00:00 - 03:30 3.50 DRILL P INT1 Con't RIH wI 12 1/4" bit on 5" DP from pipe shed. 03:30 - 04:00 0.50 DRILL P INT1 Wash as a precaution from 4,448 ft to FC @ 4,521 ft. 04:00 - 05:00 1.00 DRILL P INT1 CBU. 932 GPM. 1800 psi. 05:00 - 06:00 1.00 EVAL P INT1 Test 133/8" 68#, L 80 casing to 3,400 psi for 30 mins. OK. Review D1, D2 & D5 drills wI crew. 06:00 - 08:00 2.00 DRILL P INT1 Drill FC, & med hard cement to FS @ 4,604 ft. 08:00 - 09:00 1.00 DRILL P INT1 Displace well to 8.6 ppg mud @ 932 GPM, 2000 psi 09:00 - 09:30 0.50 DRILL P INT1 Drill FS, clean out rat hole & 20 ft new formation to 4,641 ft. 09:30 - 10:00 0.50 DRILL P INT1 Circ & cond mud @ 932 GPM, 2000 psi. 10:00 - 10:30 0.50 EVAL P INT1 Perform FIT to EMW of 12.5 ppg - 3,210 ft TVD - 655 psi surface pressure wI 8.6 ppg mud. 10:30 - 18:00 7.50 DRILL P INT1 Drill 12 1/4" directional hole 4,641 ft to 5,685. 928 GPM, 1680 psi, 11 k TO on btm, 10k TO off btm, 10k WOB, PUW 160k, SOW 130k, Rot Wt 140k. ECD= 9.64 Cal ECD= 9.63 18:00 - 18:30 0.50 DRILL P INT1 Service Can Rig TDS 18:30 - 00:00 5.50 DRILL P INT1 Drill 12 1/4" directional hole 5,685 ft to 6,542. 928 GPM, 1800 psi, 12k TO on btm, 11 k TO off btm, 10k WOB, PUW 170k, SOW 130k, Rot Wt 142k. ECD= 9.73 Cal ECD= 9.73 3/10/2004 00:00 - 18:00 18.00 DRILL P INT1 Drill with RSS fl 6542' - 8811' md. Notes: 1) Sweeps as follows: a) Pumping 25 bbl hi-vis sweeps with 10 ppb barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Still correlating closely to NS20 well. 3) RSS responding to downlinks. Meas. Depth Interval Tool Face Power Setting % 6542' - 6732' md o deg 10% 6732' - 7397' md 71 deg 20% Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Spud Date: 11/16/2002 End: Start: 11/14/2002 Rig Release: Rig Number: 33E Notes: 1) Sweeps as follows: a) Pumping 25 bbl hi-vis sweeps with 10 ppb barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Still correlating closely to NS20 well. 3) Encountered top of Ugnu @ 8749' md/4719' tvdrkb. 4) Not encountering as many hardstreaks as the NS25 well at this point. 5) RSS responding to downlinks. Meas. Depth Interval Tool Face 8811' - 9283' md 0 deg 9283' - 9472' md 0 deg Drill with RSS f/9472' - 11358' md. Notes: 1) Sweeps as follows: a) Pumping 25 bbl hi-vis sweeps with 10 ppb barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Still correlating closely to NS20 well. 3) RSS responding to downlinks. Meas. Depth Interval Tool Face 9472' - 10033' md 0 deg 10033' - 10314' md 0 deg 10314' - 10691' md 0 deg 10691'-11072'md Odeg 11072' - 11358' md 10 deg Service Top Drive. Drill with RSS f/11358' - 11833' md. 3/1 0/2004 00:00 - 18:00 18.00 DRILL P INT1 18:00 - 18:30 18:30 - 00:00 INT1 INT1 7397' - 7679' md 7679' - 7866' md 7866' - 8244' md 8244' - 8526' md 8526' - 8717' md 8717' - 8811' md Service Top Drive. Drill with RSS fl 8811' - 9472' md. 36 deg 40 deg 10 deg o deg o deg 289 deg 0.50 DRILL P 5.50 DRILL P 3/11/2004 00:00 - 18:00 18.00 DRILL P INT1 18:00 - 18:30 18:30 - 00:00 0.50 DRILL P 5.50 DRILL P INT1 INT1 20% 0% 0% 20% 10 % 20% Power Setting % 10% 0% Power Setting % 0% 10 % 20% 20% 0% Notes: 1) Sweeps as follows: a) Pumping 25 bbl hi-vis sweeps with 10 ppb barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Still correlating closely to NS20 well. 3) RSS responding to downlinks. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 311112004 18:30 - 00:00 5.50 DRILL P INT1 Meas. Depth Interval Tool Face Power Setting % 11358' - 11548' md o deg 20% 11548' - 11833' md 324 deg 20% 3/12/2004 00:00 - 00:00 24.00 DRILL P INT1 Drill with RSS f/11833' - 13660' md .- increasing lubricant concentration to address torque. 3/13/2004 00:00 - 00:00 24.00 DRILL P Notes: 1) Sweep hole as follows: a) Pumping 25 bbl hi-vis sweeps with 10 ppb barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Geology correlating closely to NS18 and NS20 wells. 3) Approaching 30K ft. lb. torque limitation. a) Core Rig Team discussion with Perform Engineer to proactively address torque and compare modeling to actual drilling parameters to verify 6000' of 5-7/8" drill pipe is adequate. b) Address torque as follows: 1. Openhole torque treat with Lubetex and EZ Glide while increasing lubricant concentration from 2.5% to 3.5%. 2. Add addtional SDF to prepare system for EP addtions. 3. Add 8 drums (0.5% EP Mud lube) to address the cased hole torque through the build. 4) RSS responding to downlinks. Meas. Depth Interval Tool Face Power Setting % 11833'· 12117'md 324deg 20% 12117'-13163'md 327deg 10% 13163' - 13539' md 36 deg 20 % 13539' - 13660' md 0 deg 20 % Drill with RSS f/13660' - 15870' md u increasing lubricant concentration to address torque. INT1 Notes: 1) Sweep hole as follows: a) Pumping 25 bbl hi-vis sweeps with 10 ppb barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Geology correlating closely to NS18 and NS20 wells. - Top Colville @ 15005' md 16963' tvd (35' above prognosis) 3) Managing. a) Torque is following model and 6000' of 5-7/8" drill pipe will be adequate to prevent overtorquing top of 5' drill pipe. b) Address torque as follows: 1. Maintain Lubetex treatment @ 3.5%. 2. Add addtional SDF to prepare system for EP addtions. 3. Add 8 drums (0.5% EP Mud lube) in two applicatoins to address the cased hole torque through the build section. 4) RSS responding to downlinks. Meas. Depth Interval Tool Face Power Setting % Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/1312004 00:00 - 00:00 24.00 DRILL P INT1 13660' - 14491' md o deg 20% 14491' - 15159' md 33 deg 10% 15159' - 15828' md 324 deg 20% 15828' - 15870' md o deg 40% 3/14/2004 00:00 - 01 :45 1.75 DRILL P INT1 Drill with RSS f/15870' - 16018' md while adding lubricant to address torque. Notes: 1) Actual torque is matching the Engineer's Model. a) Required torque to drill with 1800 feet of 5-7/8" drill pipe picked up will be -29K ft. Ibs. b) 34K ft. Ibs. is the allowable surface torque to not exceed 30K ft. Ibs at top of 5" dp. c) This provides -5K ft. lb. torque cushion when on bottom after trip to stay below to not exceed 30K at the top of 5" dp. 2) RSS responding to downlinks. Meas. Depth Interval Tool Face Power Setting % 15870' - 16018' md o deg 40% 01 :45 - 02:00 0.25 DRILL P INT1 Record Slow Pump Rates and Survey. 02:00 - 07:00 5.00 DRILL P INT1 Circulate and condtion in preparation for trip -- ECD dropped from 10.15 to 9.75 throughout circulation. Notes: 1) Pumped weighted sweep 3 ppg above MW surface to surface -- no noticeable cuttings increase with sweep. * Noticeable decrease in cuttings amount over shakers after surface to surface. 2) Pumped 2 addtional BU. 3) Adding lubricants to achieve 3.3% as follows: - Lubetex @ 1 .5% - EP Mud Lube @ 0.5% - EZ Glide @ 1.3 %. 4) Adding 3% BDF-263 to enhance lubricant mix and 0.15% Condet to address sticky clays. 07:00 - 08:30 1.50 DRILL P INT1 Monitor well and POH 5 stands wet. 08:30 - 09:00 0.50 DRILL P INT1 Pump dry job, BD top drive and lines. 09:00 - 13:00 4.00 DRILL P INT1 POH f/ 16018' - 11050' md. Notes: 1) Trip went withoug incident until the ghost reamer reached the Top of the Ugnu. 2) Ghost reamer packing off and swabbing while attempting to pull through the SV formation. 3) Unable to wipe swab off and prevent swab. 13:00 - 14:15 1.25 DRILL P INT1 Rotate and reciprocate while circuating 9500 strokes @ 16 bpm (672 gpm), shut down pumps and attempt to POH -- still swabbing -- decision to pump out of hole. Notes: 1) Encountering sticky clays in SV Formations above Ugnu -- unable to wipe off or continue POH with out swabbing -- same thing happened on NS25 with ghost reamers. 2) Porcupine reamers on past Northstar wells seemed to Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 311412004 13:00 - 14:15 1.25 DRILL P INT1 eliminate the need to pump out of hole through SV Sands. 3) The tight hole in the SV and the inability of the ghost reamers to address it may be the result of the higher hole angle both the NS25 and NS21 wells than on past Northstar wells. 14:15 - 17:45 3.50 DRILL P INT1 Pump out of hole to 8200' md. Lost -96 bbls of mud to hole. Notes: 1) No rotation and pumping 480 gpm while POOH. a) Losing 2 bpm while pulling stand while pumping 480 gpm. b) Stopped moving pipe & dec pumps to 285 -- losing 1 bpm . c) Shut down and monitor well with pumps off -- static. 2) Determined clay is balling up around ghost reamer and/or bha and pumping fluid away into the Ugnu and Schrader Sands. 3) Decision to rotate and reciprocate while gradually increasing rate to drilling rate to clean bha. 17:45 - 20:00 2.25 DRILL P INT1 Clean clay ball from ghost reamer and bha. Notes: 1) Establish circulation and increase rate to fl 285 gpm to 820 gpm while circulating BU (14000 stks). 2) Rotating 130 rpm and reciprocating. 3) Observed substancial amounts of clay at shakers. 4) ECD decreased f/10.25 to 9.82 throughout circulation. 20:00 - 22:00 2.00 DRILL P INT1 Backream fl 8200' to 7000' md with 820 gpm and 130 rpm to place ghost reamer inside surface casing shoe. Note: No noticeable losses or signs of packing off. 22:00 - 23:00 1.00 DRILL P INT1 Circ 1.5xBU at 820 gpm while rotating and reciprocating. Pull two stands -- well not swabbing. Notes: 1) Rotating 130 rpm with 14K ft. Ibs torque. 2) Considerable amounts of clay over shakers while circulating BU from the casing shoe. 3) Cuttings amount decreased noteably while circulating the BU from the bit. 4) ECD decreased from 10.1 to 9.65 throughout circulation. 4) Total 15000 strokes circulated. 23:00 - 23:30 0.50 DRILL P INT1 Monitor well, pump dry job and blow down top drive and lines. 23:30 - 00:00 0.50 DRILL P INT1 POH to 6638' md -- well not swabbing. 3/15/2004 00:00 - 01 :30 1.50 DRILL P INT1 POH to 13-3/8" casing shoe -- hole in good shape through interval backreamed with ghost reamer. 01 :30 - 01 :45 0.25 DRILL P INT1 Monitor well -- hole taking fluid due to seepage into exposed SV, Ugnu and Schrader Sands. 01 :45 - 03:30 1.75 DRILL P INT1 Slip and Cut 170' of drilling line -- losing 8 bph to hole due to seepage. 03:30 - 04:00 0.50 DRILL P INT1 POOH while standing back 5" in derrick. 115 stands 5" ODS and 23 stands 5" on DS derrick. 04:00 - 07:30 3.50 DRILL P INT1 POH while laying down 105 joints of 5" drill pipe in pipe shed. Notes: 1) LD Ghost reamer -- about 12-1/8" gauge and in good shape I I Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 311512004 04:00 - 07:30 3.50 DRILL P INT1 with minor signs of wear on bottom of blades. 2) Ghost reamer lightly balled with clay. 3) Keep 33 joints in pipe shed for RIH on top BHA to drill to 9-5/8" casing point @ 20,277' md. 4) Change 6" liners in pumps to 5-1/2". 07:30 - 10:30 3.00 DRILL P INT1 Lay Down BHA. Notes: 1) BHA lightly balled with clay -- not real bad. 2) Most of the junk slots in the bit were packed with clay. 3) Found 90 degree end of alien wrench in the bit. · This is part of the alien wrench that was dropped into the bha and resulted in a failed MWD tool during the surface test. · That MWD tool was changed out and sent to Anadrill shop in Deadhorse, disassembled and inspected to find the other part of this alien wrench. · Obviously this part of the alien wrench made it through the first MWD tool, the control collar and bias tool. 4) Finish changing pumps to 5-1/2' liners. 5) Losses to hole reduced to 6 bph seepage. 10:30 - 11 :00 0.50 DRILL P INT1 Clean rig floor. 11 :00 - 14:00 3.00 DRILL P INT1 Install 500 ton short bales and 5-7/8" dp elevators. Attach link tilt and run up into derrick -- adjust and rig down same. Note: Seepage losses reduced to 4 bph. 14:00 - 20:30 6.50 DRILL P INT1 Change Top Drive over to handle 5-7/8" drill pipe with XT57 connection. Notes: 1) Remove the clamps, upper and lower kelly valves for 5" kit. 2) Replace with the 5-718" upper and lower kelly valves for 5-718" kit. 3) Reassemble stabbing guide and actuator. 4) Install the 5-7/8" clamp assemblies. 5) Adjust pipe handler. 6) Seepage losses reduced to -3 bph. 20:30 - 21 :30 1.00 DRILL N RREP INT1 Unable to function IBOP -- remove and reinstall the actuator. 21 :30 - 22:00 0.50 DRILL P INT1 Install bales and elevators. 22:00 - 22:30 0.50 DRILL P INT1 MU 5" and 5-7/8" floor valves. 22:30 - 23:30 1.00 DRILL P INT1 Pull and inspect Wear Ring and Run Test Plug. Note: Wear Ring was worn worn on one side severely n junked wear ring. 23:30 - 00:00 0.50 DRILL P INT1 Fill Stack and RU for BOPE Test. Note: AOGCC field inspector John Crisp waived witness for test. 3/16/2004 00:00 - 06:30 6.50 BOPSUR P INT1 Test BOP's to 250 I 4800 psi wI 5" & 5 7/8" test joints. Tested annular preventer to 3500 psi. 06:30 - 07:00 0.50 BOPSUF P INT1 Set wear ring. 07:00 - 08:00 1.00 BOPSUF P INT1 RID from testing BOP's. 08:00 - 10:30 2.50 DRILL P INT1 PJSM & level rig. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/1612004 08:00 - 10:30 2.50 DRILL P INT1 Note: The west side of well row is -16" below grade and requiring shims to level. This was obvious when rig was moved onto location and took additional time to level rig. The flowline measurements have changed today after leveling the rig. 10:30 - 12:00 1.50 DRILL P INT1 PJSM - MIU BHA #4. 12:00 - 14:00 2.00 DRILL N SFAL INT1 Shallow test RSS & MWD - CIO control collar due to no signal with real time inclination wI MWD. Note: Still no signal from RSS to MWD with real time inclination - could be in the ARC or short hop - decided to go without real time inclination settings from RSS. 14:00 - 15:30 1.50 DRILL P INT1 PJSM - MIU ADN & load source. 15:30 - 16:15 0.75 DRILL P INT1 PIU 5" singles from pipeshed. 16:15 - 17:00 0.75 DRILL P INT1 Inspect & torque bolts on top drive stabbing guide plate. 17:00 - 17:30 0.50 DRILL P INT1 MIU ghost reamer 800' behind the bit & dart sub. 17:30 - 18:00 0.50 DRILL P INT1 P/U 5" singles from pipeshed. 18:00 - 00:00 6.00 DRILL P INT1 RIH wI 5" DP to 11,300' MD filling every 30 stands. 3/17/2004 00:00 - 02:45 2.75 DRILL P INT1 RIH from 11,300' to 14522' wI 5" DP filling every 30 stands. 02:45 - 03:15 0.50 DRILL P INT1 PJSM - CIO bales to 500T & elevators to handle 5 7/8" DP Note: Circulate @ 1 BPM @ 460 psi while C/O bales. Reciprocate pipe in between taking 350T bales off & putting 500T bales on. 03:15 - 03:45 0.50 DRILL P INn Stage up pumps & record off bottom torque. Compare to off bottom torque when this section was drilled and verify torque modeling accurate to verify maximum surface torque allowable to prevent overtorquing top of 5" drill pipe. Note: 1) At 710 GPM, 2100 psi, 50 RPM, Torque 16K - 21K 2) At 710 GPM, 2100 psi, 100 RPM, Torque 19K - 21K 3) At 710 GPM, 2100 psi, 140 RPM, Torque 19K - 22K 4) We are currently 1-2K lower on off bottom torque compared to when this section was drilled at this particular depth. 5) Lost 38 bbls while circulating for 1 hr. 03:45 - 05:00 1.25 DRILL P INT1 RIH w/5 7/8" DP from 14522' to 15,177'. 05:00 - 07:30 2.50 DRILL P INT1 Wash down from 15,177' to bottom @ 16018'.285 GPM, 790 psi Note: Total losses for trip was 120 bbls. 07:30 - 08:00 0.50 DRILL P INT1 Drill ahead in 12 1/4" hole wI RSS from 16018' to 16046'. 08:00 - 09:30 1.50 DRILL P INT1 Circulate to condition mud. 09:30 - 13:45 4.25 DRILL P INT1 Drill ahead from 16046' to 16456' md. Note: Current maximum allowable surface torque is 34K ft. Ibs. Verifying maximum torque at surface with depth per Perform Engineer and communicating this to driller after confirming with WSL. 13:45 - 23:30 9.75 DRILL N RREP INT1 Replace fluid end on #2 mud pump. Note: Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 311712004 13:45 - 23:30 9.75 DRILL N RREP INT1 1. Fluid end cracked in housing below cap gasket between suction and discharge chambers. 2. Pumped a sweep and began reciprocating while rotating and circulating holeclean with one pump @ max rate 120 spm (426 gpm). 3. Slowed pumps down to 1 bpm at only 7200 strokes (1/3 surface to surface) after DD warned that 425 gpm was out of the 600-1200 gpm required to turn the RSS and MWD tools on. Stopped rotary and continued to work pipe. . Circulating at these sub-operating rates have caused RSS andlor MWD tools to fail prematurely in previous wells for Andadrill. 23:30 - 00:00 0.50 DRILL P INT1 Drill ahead from 16456' to 16525' md. Notes: 1) Current maximum allowable surface torque is 34K ft. Ibs. . verifying maximum torque at surface with depth per Perform Engineer and communicating this to driller after confirming with WSL. 2) Lubricant concentration 4.2% wI 2.5% lubetex, .6% EP Mudlube, 1.1 % EZ Glide. 2) Losses 5 BPH while CIO fluid end & 25 BPH while drilling ahead. 3) Last survey @ 16359' MD -Incl 69.93, AZ 308.65 3/18/2004 00:00 - 00:30 0.50 DRILL P INT1 Circulate & condition mud while changing shaker screens. 00:30 - 21 :00 20.50 DRILL P INT1 Drill directional in 12 1/4" hole wI RSS from 16525' to 18583' MD Notes: 1) Started 1 1/2 deg drop per 100' @ 18,200' MD - @ 18522' incl 63.24 Deg, AZ 308.68 2) Alternating hi-vis barofibre & 3 ppg over MW sweeps every 500'. 3) RSS responding to commands. 21 :00 . 21 :30 0.50 DRILL P INT1 Service Top Drive 21 :30 - 00:00 2.50 DRILL P INT1 Drill directional in 12 1/4" hole wI RSS from 18583' to 18915' MD. Note: 1) Last survey @ 18909' MD - inc157.17 deg, AZ 310.30 2) Lubricant concentration Lubetex 1 %, Torque trim 2%, EP Mudlube 1%, EZ Glide .5%. 3/19/2004 00:00 - 03:30 3.50 DRILL P INT1 Drill directional in 12 1/4" hole wI RSS from 18915' to 19356' Note: 1) Last survey @ 19295' - IncI50.43, AZ 310.98 03:30 - 06:45 3.25 DRILL P INT1 Circulate to condition mud. Pump 3 ppg over MW weighted & sweep & circulate surface to surface. Note: 1) Shut down pumps after sweep back to surface to rack 1 stand back in derrick. 2) Resumed circulating - lost 1000 psi pump pressure in 30 Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/19/2004 03:30 - 06:45 3.25 DRILL P INT1 minutes - suspected washout. 06:45 - 10:30 3.75 DRILL P INT1 POH looking for washout to previously chosen wiper trip depth of 16000' Note: 1) Trip back to 16000' was good with no swab. Dry wiped 4 tight spots one time only & they cleaned up. Tight spots @ 17545', 17430',16965', & 16700' wI avg. drag of 55K. 15K to 20K drag after wiping. 10:30 - 11 :30 1.00 DRILL N DFAL INT1 Continue POH looking for washout. All 50 stands of 57/8" DP out. 11 :30 - 12:00 0.50 DRILL N DFAL INT1 C/O bales & elevators for 5" DP. Note: 1) Locate washout on the top jt of second stand of 5" pulled. ( Between slip area & tool jt) Stand 149. 12:00-13:15 1.25 DRILL N DFAL INT1 C/O 5" single & circulate @ 850 GPM 2900 psi. 13:15 - 14:00 0.75 DRILL N DFAL INT1 BID lines & C/O to 500T bales & 5 7/8" elevators. 14:00 - 15:00 1.00 DRILL N DFAL INT1 RIH to wiper trip depth @ 16,000' 15:00 - 17:30 2.50 DRILL P INT1 Continue RIH from 16000' to 19300' filling every 25 stands. 17:30 - 00:00 6.50 DRILL P INT1 Pump 3 ppg over MW weighted sweep & pump surface to surface. Continue circulating & conditioning mud - adding water to lower MW to 9.2. 3/20/2004 00:00 - 02:00 2.00 DRILL N WAIT INT1 Continue circulating to condition mud to 9.2 ppg by dilution wI water. Note: Production utilizing NS-10 disposal well which delayed dumping mud from rig to G & I. Pits full @ G & I & could not start bleed in of spike fluid before getting rid of additional volume from rig. 02:00 - 05:30 3.50 DRILL P INT1 Increase MW to 10.2 ppg from 9.2 ppg by adding 1000 bbls 12.5 ppg spike fluid treated wI black products. 05:30 - 08:30 3.00 DRILL P INT1 Drill directional in 121/4" hole wI RSS from 19355' to 19534'. 08:30 - 10:00 1.50 DRILL P INT1 Clean suction screens on both mud pumps. 10:00 - 21 :15 11.25 DRILL P INT1 Drill directional in 12 1/4" hole wI RSS from 19534' to 20033'. Note: 1) Top of Kuparuk @ 19527' MD, 8833' TVD. 2) Kuparuk C faulted out 3) Kuparuk A @ 19961' MD, 9146' TVD. (A4 sand faulted out & part of A3) 21:15 - 21:45 0.50 DRILL P INT1 Service Top Drive. 21 :45 - 00:00 2.25 DRILL P INT1 Drill directional in 12 1/4" hole wI RSS from 20033' to 20107' Notes: 1) Lubricant concentration 3.8% Torque Trim, 1% EP Mudlube. 2) Last Survey @ 19973', Inc140.22 AZ 307.64 3) Managing torque by reducing RPM's to 100 -120. (Top Drive continuous torque limited to 41 K @ 150 RPM's) 3/21/2004 00:00 - 07:30 7.50 DRILL N RREP INT1 Repaired fluid end on #2 mud pump. Body in fluid end washed out behind seat. This is fluid end that was replaced just a few Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/21/2004 00:00 - 07:30 07:30 - 12:00 7.50 DRILL N 4.50 DRILL P RREP INT1 INT1 days ago. Drill with RSS f/1201 07' - 20227' md -- Geologist picked top of Miluveach @ 20183' md I 9320' tvdrkb -- 44' of rathole in Miluveach. 12:00 - 15:00 3.00 DRILL P Notes: 1) Reduced rotation to 130 rpm to compensate high torque -- 40K ft. Ibs. -- Torque limit set at 41 k. 2) Adding lubricant to maintain concetration @ 4.5% to manage torque and drag. 3) RSS set @ 0% power setting and 0% tool face since 20033 md. 4) Pumped 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep. Perform Wiper Trip to 19067' md -- overall good trip. INT1 15:00 - 00:00 9.00 DRILL P Notes: 1. 10 to 30 overpull from TD to 19931' md (3 stands). 2. 50K overpull on next stand #4. 3. 75K overpull on next stand #5 -- wiped with no change. Correlates to ledges in top of Kuparuk. 4. Stands 5, 6 and 7 experience 75K overpull -- wiped numerous areas with no change -- correlates to ledging in the top of the Kuparuk formation and through the Kalubik. 5. Stands 9 & 10 pulled with 20 to 30 overpull up to the last bit trip. 6. Stands 11 and 12 pulled clean with 10 to 20 overpull. 7. RIH with @ 60' per min to 19400 with 180K SOW. 8. Slackoff weight dropped off to 150 at 60 fpm to 19525' md when stacked up to 100K SOW (include top drive). Picked up and Slacked off to 90K @ 60 fpm and sat down on same ledge @ 19525' md. PU and increase running speed to 90 fpm or 1.5 fps and slack off decrease to 135K but gained weight back immediately to 180K. Finished trip @ 1.5 fps running speed with slack off weights between 150 and 180K for remainder of trip -- final slack off weight. 9. Continured RIH @ 90 fpm (1.5 fps) through ratty section of hole -- Recommend that casing running speed be increased to 1.5 fps from 19300' md to TD -- PUW 390K and SOW 210K. Circ and Cond Mud while cleaning hole in preparation for casing run. INT1 Notes: 1. Pumped 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep. 2. Moderate amount of cuttings with bottoms up. 3. Trip gas @ 3100 units -- Gas Cut mud to 9.6 ppg -- typical. 4. Sweep at surface brought minimal cuttings to surface. 5. Pumped 2nd 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep while circulating the minimum 3 BU for hole cleaning practice for ERD wells -- sweep brought minimal cuttings back to surface. 6. Add lubricant to leave good lubricated mud in hole for Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/21/2004 15:00 - 00:00 9.00 DRILL P INT1 casing run. 3/22/2004 00:00 - 01 :30 1.50 DRILL P INT1 Continue circulating 2nd 45 bbllow vis followed by 50 bbl 3 ppg over MW weighted sweep - minimal cuttings back to surface. 01 :30 - 02:00 0.50 DRILL P INT1 Monitor well Note: Losses are 2 BPH while static. 02:00 - 09:00 7.00 DRILL P INT1 POH from 20227' to 13800'. Note: Trip was good wI occasional overpulls to 45K due to cuttings beds between 18500' & 17000'. 09:00 - 09:30 0.50 DRILL P INT1 Spot 150 bbl LCM pill @ 13800'.10 ppb steel seal & 5 ppb barofibre. 09:30 - 13:30 4.00 DRILL P INT1 Continue POH from 13800' to 4985'. 13:30 - 14:45 1.25 DRILL P INT1 Tight spot @ 4985' - pump & back ream from 4985' to 4953'. 14:45 - 15:15 0.50 DRILL P INT1 POH inside shoe to 4572 15:15-16:00 0.75 DRILL P INT1 CBU @ 7 BPM, 1100 psi, 80 RPM 16:00 - 17:00 1.00 DRILL P INT1 RIH to 5100' to ensure tight spot cleaned up. POH to 4572' 17:00 - 20:00 3.00 DRILL P INT1 Slip & cut 170' drilling line. Service TD, drawworks, & crown. Static losses 2.5 BPH. 20:00 - 21 :00 1.00 DRILL P INT1 Circulate EP mud lube sweep around & discard @ surface 21 :00 - 21 :30 0.50 DRILL P INT1 Monitor well - pump dry job - BID lines. 21 :30 - 00:00 2.50 DRILL P INT1 POH to BHA. SLM on TOH no correction. 3/23/2004 00:00 - 03:00 3.00 DRILL P INT1 UD BHA # 4 - bit in good shape graded 0-0. 03:00 - 06:00 3.00 BOPSUP P INT1 Pull bowl protector - install test plug - change out upper rams to 9 5/8" & test door seals. 06:00 - 09:30 3.50 CASE P INT1 UD testing equip't. RIU 95/8" casing handling tools. 09:30 - 1 0:00 0.50 CASE P INT1 PJSM on 9 5/8" casing run. 10:00 - 20:00 10.00 CASE P INT1 Run jts 1 - 112 of 9 518" 47# L-80 Mod Butt. to 133/8" shoe @ 4,621 ft w/3 BPH losses. 20:00 - 21 :00 1.00 CASE P INT1 Circulate @ shoe staging up pump from 1 to 10 BPM & CBU. At 10BPM, 420 psi. P/U wt 21 OK, S/O wt 185K 21 :00 - 00:00 3.00 CASE P INT1 Run jts 113 to 153 of 9 5/8" 47# L-80 Mod Butt. w/3 BPH losses. Getting PIU wts every 10 jts. Perform Engineer tracking P/U & S/O wts for entire casing run. 3/24/2004 00:00 - 21 :00 21.00 CASE P INT1 Con't RIH w/9 5/8",47#, BTC-M, L 80 casing to 20,164 ft. Note: Controlled running speed through out entire run. Lost returns @ 19,360 ft. Slack off weights slightly below model. 21 :00 - 21 :30 0.50 CASE P INT1 MU mandrel hanger. Land casing wI 170k hook load on the hanger. FS @ 20,207 ft FC @ 20,125 ft 21 :30 - 22:30 1.00 CASE P INT1 RD fill up tool. MU cement head & surface circ lines. 22:30 - 00:00 1.50 CASE P INT1 Circ casing staging pumps up to 1.5 BPM @ 1130 psi 3/25/2004 00:00 - 03:00 3.00 CEMT P INT1 Continue staging up pump & circulate prior to cement job as follows: Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 312512004 00:00 - 03:00 3.00 CEMT P INT1 Time Rate ICP FCP Total Stks 22:35 .5 BPM 1050 1050 377 23:31 1 BPM 1120 1120 378 - 548 23:45 1.5 BPM 1160 1130 549 - 1039 00:11 2 BPM 1160 1040 1040 - 1697 00:37 2.5 BPM 1080 1080 1698 - 2242 00:58 1.5 BPM 990 970 2243 - 2431 01:07 3 BPM 1080 940 2432 - 3591 01:36 1 BPM 940 830 3592 - 4234 Notes: 1) Lost 285 bbls while pumping 360 bbls - Avg 20% returns 2) Lost complete returns @ 3 BPM before backing off to 1 BPM & regaining returns. 3) Had losses throughout circulation starting @ .5 BPm 4) Held PJSM for cement job. 03:00 - 07:30 4.50 CEMT P INT1 1) Pump 5 bbls sea water & test lines to 3500 psi. 2) Pump 50 bbls 11.2 ppg weighted spacer & drop bottom plug. 3) Pump 838 bbls (1452 sx) 11.2 ppg Class G lead slurry followed by 143 (700 sx) 15.9 ppg Class G tail cement. 4) Drop top plug & wash up wI 25 bbls sea water from HOWCO on top of plug. 5) Swap to rig pump for displacement. Notes: Lost 900 bbls while pumping 1056 bbls spacer, cement, & sea water. Avg 12% returns. 07:30 - 10:00 2.50 CEMT P INT1 Displace cement wI 10.3 ppg mud @ 10 BPM. Lost 730 bbls while displacing wI 1448 bbls - Avg 51% returns. Pumped 94% PE + 1/2 shoe track & did not bump plug. Bled off pressure - check floats - floats holding. Ending pump pressure @ 5 BPM . 2250 psi. 10:00 - 10:30 0.50 CEMT P INT1 RID landing jt & cement head. 10:30 - 11 :30 1.00 CEMT P INT1 Install packoff & test to 5000 psi. 11 :30 - 13:00 1.50 CEMT P INT1 Change out sweeps, remove casing handling equip't from floor, & RID packoff running tools. 13:00 - 15:00 2.00 CEMT P INT1 R/U kill line to pump down 133/8" X 9 5/8" ann. Test lines to 2500 psi. Pump down annulus wI 10.3 ppg @ 1 BPM until pressure broke over @ 450 psi. Increase rate to 4 BPM for a total of 275 bbls. FCP - 270 psi. 15:00 - 16:30 I 1.50 BOPSUP P INT1 C/O top rams to 41/2" X 7" variables - R/U kill line to stack. I i Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 312512004 16:30 - 17:00 0.50 CASE P INT1 RID 500T bales - Install iron roughneck track. 17:00 - 18:00 1.00 BOPSUF P INT1 RIU test equip't - set test plug - fill stack. 18:00 - 00:00 6.00 BOPSUF P INT1 Test BOP's per BP I AOGCC regs. 250 psi low, 4800 psi high, annular preventer 250L, 3500H. Test BOP's wI 5" & 5 7/8" test jts & tested 5" & 5 718" floor valves. 3/26/2004 00:00 - 01 :00 1.00 BOPSUF P INT1 RID & BID BOP test equip't. 01 :00 - 03:00 2.00 CASE P INT1 CIO dies on top drive back up wrench. Install bales & elevators. 03:00 - 08:00 5.00 DRILL P INT1 MIU BHA & surface test equip't. Note: Bias unit did not test - UD & found rag in control collar - removed rag & retested on surface - okay 08:00 - 09:00 1.00 DRILL P INT1 Load source in ADN. Freeze protect 133/8" x 9 518" annulus wI 125 bbls diesel out of critical path. 09:00 - 16:00 7.00 DRILL P INT1 RIH wI 5" DP 16:00 - 18:30 2.50 DRILL P INT1 P/U 48 singles from pipeshed & RIH. 18:30 - 20:00 1.50 DRILL P INT1 C/O bales & elevators to 5 7/8". 20:00 - 22:30 2.50 DRILL P INT1 Cut & slip drilling line. Service top drive, drawworks, & crown. 22:30 - 00:00 1.50 DRILL P INT1 RIH wI 5" DP. 3/27/2004 00:00 - 01 :00 1.00 DRILL P INT1 Continue RIH to 19435' 01 :00 - 04:30 3.50 DRILL P INT1 Washdown from 19435' to FC @ 20125' 70 SPM, 1200 psi Note: Tag cement stringers @ 20011' & tagged plugs @ 20065' 04:30 - 05:00 0.50 DRILL P INT1 Circulate in preparation for casing test. 05:00 - 06:00 1.00 EVAL P INT1 RIU & test casing to 4000 psi wI 10.3 ppg & hold for 30 min. 06:00 - 06:30 0.50 DRILL P INT1 Drill plugs & F/C on depth @ 20125' 06:30 - 09:30 3.00 DRILL P INT1 Add spike fluid & wt up to 12.5 MW while drilling shoe track. 09:30 - 10:00 0.50 DRILL P INT2 Drill shoe & 20' new hole to 20247' 10:00 - 10:30 0.50 DRILL P INT2 Conduct FIT to 15.0 EMW wI 12.5 mud. 1190 psi surface pressure 10:30 - 13:00 2.50 DRILL P INT2 Drill 8 1/2" hole from 20247' to 20262' 13:00 - 13:30 0.50 DRILL N RREP INT2 C/O pop off on #1 mud pump. 13:30 - 14:00 0.50 EV AL P INT2 Increase flow rate to 550 GPM, open Rhino reamer. Check that blades opened. 14:00 - 21 :30 7.50 DRILL P INT2 Drill ahead in 8 1/2" hole opened up to 9 1/2" wI rhino reamer from 20262' to 20505'. Notes: 1) Calculated ECD's 13.95 - to 13.97, Actual ECD's 14.14- 14.24. 2) Lubricant concentration @ 5.75% - 4.5% Torque trim, 1.25% EP mud lube. 21 :30 - 22:00 0.50 DRILL P INT2 Service top drive. 22:00 - 00:00 2.00 DRILL P INT2 Continue drilling ahead in 9 1/2" hole from 20505' to 20565'. 3/28/2004 00:00 - 13:30 13.50 DRILL P INT2 Drill 8 1/2" hole wI RSS opened up to 9 1/2" hole wI Rhino Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 3/28/2004 00:00 - 13:30 13.50 DRILL P INT2 reamer from 20565' to 21120'. Notes: 1) Top of Kingak @ 20760' MD, 9802' TVD. 2) RSS responding to down links. 3) Anadrillog shows Rhino reamer opening hole to 9 1/2" 4) 4% GEM in mud system for shale inhibition & stabilization. 5) 5.75% lubricants in mud - 1.25% EP mud lube, 4.5% torque trim. 6) Control drill to 60' per hr. 13:30 - 14:30 1.00 DRILL N RREP INT2 CIO cap gasket on #1 mud pump. 14:30 - 18:00 3.50 DRILL P INT2 Continue drilling ahead from 21203' to 21375'. 18:00 - 18:30 0.50 DRILL P INT2 Service top drive. 18:30 - 00:00 5.50 DRILL P INT2 Continue drilling ahead from 21375' to 21599'. Note: 1) Last survey @ 21578', Inc117.30 AZ 307.85 2) Up wt. 330K, Dn wt. 195K, Rot wt. 245K 3/29/2004 00:00 - 09:00 9.00 DRILL P INT2 Drill ahead in 8 1/2" hole opened up to 9 1/2" hole wI Rhino reamer to TD @ 21985' MD. Notes: 1) Pumped weighted barofibre sweep @ 21750' wI 25% increase in cuttings on B/U 2) Incurred losses while drilling last 11' of Sag. (240 bbls) 09:00 - 12:30 3.50 DRILL P INT2 Circulate LCM pill for losses in Sag. 25 ppb steel seal, 25 ppb barofibre, 15 ppb barocarb 25, 12:30 - 15:00 2.50 DRILL P INT2 POH from 21985' to 20020'. Pulled wet & did not pump out. Trip out was excellent. No overpull - No swabbing. 15:00 - 16:00 1.00 DRILL P INT2 Circulate @ shoe to condition mud & check for losses. No losses while pumping @ 8.5 BPM but when increased to 9 BPM incurred 50 BPH losses. 16:00 - 16:30 0.50 DRILL P INT2 BID lines & monitor well. Well static 16:30 - 18:30 2.00 DRILL P INT2 RIH - trip was excellent - took 40k drag @ 21,140' wiped once & it cleared up - no fill @ TD. 18:30 - 23:00 4.50 DRILL P INT2 Pump hi vis barofibre sweep 1 stand off bottom @ 350 GPM, 2100 psi, RPM 110. Losses of 15 BPH increased to 100 BPH - back off rotary to 30 RPM, 5 BPM. Losses still @ 100 BPH. 23:00 - 00:00 1.00 DRILL P INT2 Spot LCM pill @ TD, barofibre & steel seal. 3/30/2004 00:00 - 01 :00 1.00 DRILL P INT2 Spot LCM pill at 21,985' MD. 01 :00 - 03:00 2.00 DRILL P INT2 POOH 7 stands, above the pill. Pump out to the shoe at 20,227' MD. 03:00 - 03:30 0.50 DRILL P INT2 Monitor well at shoe. 03:30 - 20:30 17.00 DRILL P INT2 Pump dry job. Blow down mud lines. POOH and lay down 48 joints of 5" DP. Con't POH racking 5" & 5 7/8" DP in derrick 20:30 - 21 :30 1.00 DRILL P INT2 POOH to 510' MD, 20k Ibs over pull. RIH tag 10k down to confirm. POOH to 300' MD. RIH to 474' MD, stack up 15k. Printed: 4/30/2004 1 :42:55 PM legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRlll+COMPlETE NABORS ALASKA DRilLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 313012004 20:30 - 21 :30 1.00 DRILL P INT2 "Suspect casing part at 474' MD (bit hang up). Suspect reamer hung up at 510' MD on TOOH. 21 :30 - 00:00 2.50 DRILL P INT2 POOH. Lay down BHA #5. 3/31/2004 00:00 - 01 :00 1.00 DRILL P INT2 Lay down BHA. 01 :00 - 03:00 2.00 DRILL N DFAL INT2 Rig up and RIH with Retrievable Bridge Plug (RBP). Set at 1,521' MD. 03:00 - 06:00 3.00 DRILL N DFAL INT2 Dump sand into drillpipe and pump down hole to protect fish neck. 06:00 - 08:00 2.00 DRILL N DFAL INT2 RIH. Circulate 9.0 ppg into well to displace diesel. 08:00 - 08:30 0.50 DRILL N DFAL INT2 POOH. Pull wear ring and packoff. 08:30 - 10:00 1.50 FISH N DFAL INT2 Rig up to pull 9-5/8" casing. 10:00 - 10:30 0.50 FISH N DFAL INT2 PJSM on puling 9-5/8" casing. 10:30 - 11 :30 1.00 FISH N DFAL INT2 Pull 406.90 ft (10 jts) 9-5/8" casing. Last jt had collar on it. Pin looking up in hole. "Casing pulled with no overpull. 11 :30 - 12:00 0.50 FISH N DFAL INT2 Rig down 9-5/8" casing. .. Fisrt two connections broke @ 7k & 8k ftlbs .. All others between 10k - 15k ftlbs of torque. 12:00 - 12:30 0.50 FISH N DFAL INT2 Clear rig foor. Pick up 5" equipment. 12:30 - 13:00 0.50 FISH N DFAL INT2 Test kill line. Blow down all mud lines. 13:00 - 16:30 3.50 FISH N DFAL INT2 Make up back off tool. 16:30 - 17:30 1.00 FISH N DFAL INT2 RIH to 505' with 5" DP, DC's, BOT, and HWDP. Fill every stand with seawater. 17:30 - 18:30 1.00 FISH N DFAL INT2 Change out to long bales. 18:30 - 20:00 1.50 FISH N DFAL INT2 Set dogs with 1500 psi and 3000 psi pressure increase (top at 505' MD; bottom at 531' MD). Attempt to back out with various pressures and trouble shooting. 20:00 - 21 :00 1.00 FISH N DFAL INT2 Blow down all mud lines. Change out to short bales to POOH. 21 :00 - 21 :30 0.50 FISH N DFAL INT2 POOH with back off tool. 21 :30 - 22:30 1.00 FISH N DFAL INT2 Lay down back off tool. Some broken dogs, re-runnable. Make up 103/4" stop ring to tag top of fish. 22:30 - 23:00 0.50 FISH N DFAL INT2 RIH with stop ring. Tag top of fish at 455' MD. 23:00 - 00:00 1.00 FISH N DFAL INT2 POOH with stop ring. Lay down same. 4/1/2004 00:00 - 01 :30 1.50 FISH N DFAL INT2 RIH to backout 9-5/8" casing. 01 :30 - 02:30 1.00 FISH N DFAL INT2 Spaceout and back out casing. "Set top dogs at 480' MD; Bottom dogs at 506' MD. .. Joint backed out with 1200 psi. "Obtained 1/4 to 1/8 revolutions each cycle - 4 total turns. 02:30 - 05:00 2.50 FISH N DFAL INT2 POOH and LD BHA. 05:00 - 06:30 1.50 FISH N DFAL INT2 Pick up spear/grapple assembly and RIH. 06:30 - 07:00 0.50 FISH N DFAL INT2 POOH. Pick up a mule shoe. "Grapple did not engage, suspect may not be entering casing. 07:00 - 07:30 0.50 FISH N DFAL INT2 RIH to contniue backing out fish. I ! Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 411/2004 07:30 - 09:00 1.50 FISH N DFAL INT2 Attempt to engage fish. Did not appear to engage. Begin to POOH, spear immediately caught fish and released. Stop job, inspect equipment and repair as required. 09:00 - 09:30 0.50 FISH N DFAL INT2 Continue to POOH. **Grapple not LlH. 09:30 - 10:30 1.00 FISH N DFAL INT2 Redress fishing equipment with grapple / spear and RIH. 10:30 - 12:00 1.50 FISH N DFAL INT2 Engage fish. Back out with 7 turns. POOH. 12:00 - 13:00 1.00 FISH N DFAL INT2 PJSM. Lay down spear and casing. ** Half of the initial spear found in casing joint. Rest is left in hole. ** Casing joint in good condition. No damage to threads. 13:00·14:00 1.00 FISH N DFAL INT2 Clear rig floor. PJSM. Rig up to run casing. 14:00 . 16:30 2.50 FISH N DFAL INT2 RHI with 9-518" 47# BTCM casing. ** 12 joints total, with one 5' pup (buried). 16:30 . 18:00 1.50 FISH N DFAL INT2 Sting into casing stub. Work torque down. ** Took over 75 revolutions to work torque into pipe. Anticipating 11 revs. 18:00 - 18:30 0.50 FISH N DFAL INT2 Test caing to 3000 psi for 10 minutes. 18:30 - 19:00 0.50 FISH N DFAL INT2 Blow down all mud lines and top drive. 19:00 - 20:00 1.00 FISH N DFAL INT2 Pump out casing using G&I to drop fluid level for spill prevention during casing cut. 20:00 - 21 :30 1.50 FISH N DFAL INT2 PJSM. Nipple down BOPE. 21 :30 - 23:00 1.50 FISH N DFAL INT2 PJSM. Pull 350k actual on casing (420k on weight indicator). ** Casing took 4.5' of stretch. Set emergency slips. 23:00 . 23:30 0.50 FISH N DFAL INT2 Rough cut casing. Lay down same. ** Cut casing stub 9.33' long. 23:30 - 00:00 0.50 FISH N DFAL INT2 Nipple down riser. Move BOPE out of the way for final cut. 41212004 00:00 - 01 :00 1.00 FISH N DFAL INT2 - Set back BOP. Perform final cut on casing. 01 :00 - 02:00 1.00 FISH N DFAL INT2 - Set packoff. Test to 5000 psi. 02:00 - 06:30 4.50 FISH N DFAL INT2 - Nipple up BOP and body test to 4800 psi. 06:30 - 08:00 1.50 FISH N DFAL INT2 . Pick up fishing BHA, 8.5" reverse circulating basket. - RIH to 1500' MD. 08:00 - 10:00 2.00 FISH N DFAL INT2 - Wash down to RBP at 1521' MD. No indication of junk. - POOH. ** No junk in basket. ** No markings of junk. 10:00 - 12:30 2.50 FISH N DFAL INT2 - RIH with same BHA. ** Wash and work over fishing neck of RBP. ** Spud on fish, showing reactive torque. ** Mill on junk I top of RBP. ** Reactive torque subsiding. 12:30 - 13:00 0.50 FISH N DFAL INT2 - Flow check well. - Blow down lines. 13:00 - 15:00 2.00 FISH N DFAL INT2 - POOH with reverse circ sub. ** Fingers missing. ** Burn shoe 100% worn. ** All indications that large junk pieces are broken up. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/2/2004 15:00 - 16:30 1.50 FISH N DFAL INT2 - RIH with reverse circ sub (w/o finger basket) and junk basket. - Tag fish on depth, no fill. - Circulate 30 bbls to fill junk basket. Allow fluid to settle. - Circulate a hi-vis weighted sweep at 600 gpm. Allow fluid to settle. 16:30 - 19:00 2.50 FISH N DFAL INT2 - POOH. .. Minimal junk in basket, to include one horseshoe shaped brass piece. Photo sent to Anchorage ODE. 19:00 - 20:30 1.50 FISH N DFAL INT2 - RIH with junk basket and packer retrieving tool. .. PU 95k. Upper limit for tool sheer is 117k over PU. ** Pump at 50 spm/25 psi. .. Tag fish. .. Pump at 90 spm 1125 psi. Pumps off. .. Set weight down to 80k. .. Pump at 90 spm 1410 psi. Swallowed neck on RBP. .. SO to 65k, turn 1/2 rev. PU 100k. No Latch. .. Repeat. Latched fish. Fluid dropped 7 bbls. Well on a vacuum. .. Some difficulty getting free; however, worked free with pump and repeated attempts. .. Once free, shut pumps off and monitor well. 20:30 - 00:00 3.50 FISH N DFAL INT2 - POOH with RBP. ** POOH with hole fill. Trend sheet accurate. .. Fish catching every 40 feet, suspect junk hanging up on casing connections. .. Circulate bottoms up at 90 spm. .. Fish continuing to catch, pump 2 stands out. .. Decision to stop pumping (not providing any relief). .. Fish coming easy, no catching from 1267' to 579' MD. .. At 579', overpull to 200k. Work repeatedly. Begin pumping, fish released with 84 spm I 44 psi. .. Continue to POOH without incident. .. Two pieces of grapple retrieved as well as fingers from the reverse circulating basket. Photos sent to Anchorage ODE. .. Drained possum belly and found metal shavings but no large junk. 4/3/2004 00:00 - 01 :00 1.00 FISH N DFAL INT2 - Lay down RBP and BHA. 01 :00 - 01 :30 0.50 FISH N DFAL INT2 - Clear rig floor. 01 :30 - 02:00 0.50 DRILL P INT2 - Change out saver sub on TD to 5-7/8". - Torque to 52k ftlbs. - Adjust grabber. 02:00 - 03:00 1.00 BOPSUP P INT2 - PJSM - Pull wear ring. - Install test plug. 03:00 - 04:30 1.50 BOPSUP P INT2 - Change out upper rams to 2-7/8" x 5" 04:30 - 05:00 0.50 BOPSUP P INT2 - PJSM. - Rig up to test BOPE. 05:00 - 13:30 8.50 BOPSUP P INT2 - Test BOPE with 4", 5", 5-7/8" test joints to BP & AOGCC regs. 250 psi low I 4800 psi high 13:30 - 14:00 0.50 BOPSUP P INT2 - Blow down top drive and all mud lines. I I Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 413/2004 14:00 - 16:00 2.00 BOPSUP P INT2 · Slip and cut drilling line. 16:00 - 17:00 1.00 BOPSUP P INT2 - Service top drive, crown, and drawworks. 17:00 - 18:30 1.50 FISH N RREP INT2 - Trouble shoot RPM and brakes on TD. · PJSM - Remove brake disc. 18:30 - 00:00 5.50 FISH N DFAL INT2 - PJSM - Remove wash pipe. *' Wash pipe not coming free. Removed gooseneck for access. 4/4/2004 00:00 . 02:30 2.50 FISH N DFAL INT2 Continue to change out wash pipe on top drive. 02:30 . 05:30 3.00 BOPSUP P INT2 Pull test plug. Install wear ring. **Daylight savings of 1 hour. 05:30 - 07:00 1.50 FISH N DFAL INT2 Pick up BHA #17, cleanout BHA. 07:00 - 08:00 1.00 FISH N DFAL INT2 Test MWD. Test wash pipe to 4500 psi. Blow down lines. 08:00 - 12:00 4.00 FISH N DFAL INT2 RIH to 5,479' MD Notes: · RIH at 60 fpm. · Strap in the hole. - Fill pipe every 30 stands. · Hole took approximately 3 bbls. 12:00 - 13:30 1.50 FISH N DFAL INT2 Circulate and condition mud one bottoms up at 5,479' MD. 13:30 - 17:00 3.50 FISH N DFAL INT2 RIH at 10,205' MD Notes: · RIH at 60 fpm. - Strap in the hole. - Fill pipe every 30 stands. · Hole took approximately 8 bbls. 17:00 - 18:30 1.50 FISH N DFAL INT2 Circulate and condition mud one bottoms up at 10,205' MD. 18:30 . 22:00 3.50 FISH N DFAL INT2 RIH at 14,638' MD Notes: - RIH at 45 fpm. - Strap in the hole. - Fill pipe every 30 stands. - Hole took approximately 16 bbls. 22:00·23:30 1.50 FISH N DFAL INT2 PJSM. Install brake hub. 23:30 - 00:00 0.50 FISH N DFAL INT2 Circulate and condition mud one bottoms up at 14,638' MD. 4/5/2004 00:00 - 01 :00 1.00 FISH N DFAL INT2 Continue to circulate and condition mud one bottoms up at 14,638' MD. 01 :00 - 03:30 2.50 FISH N DFAL INT2 RIH picking up 5" singles from the pipe shed. Notes: - RIH at 45 fpm. · Strap in the hole. · Picked up 48 singles. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 415/2004 03:30 - 04:30 1.00 FISH N DFAL INT2 Change out to 5-7/8" handling equipment 04:30 - 08:30 4.00 FISH N DFAL INT2 RIH to 20,070' MD with 5-7/8" DP Notes: - RIH at 45 fpm. - Strap in the hole. SLM no correction. - Fill pipe every 30 stands. - No indications of losses. - Shoe at 20,150' MD 08:30 - 15:00 6.50 FISH N DFAL INT2 Circulate and condition mud. Notes: - Mud coming back from 11.9 ppg - 14.2 ppg. Circulate until MWin = MWout. - Circ 350 - 550 GPM. Max ECD 14.3 ppg. 120 RPM's - Replace TD brake and RPM indicator while circulating. 15:00 - 17:00 2.00 FISH N DFAL INT2 Run into open hole to 21,945' MD (12' into Sag). Notes: - RIH @ 45 fpm - No tight hole. - No losses. - No indication of fill. - Took 20k drag @ 20,825' MD. Worked through with no problems. 17:00 - 19:30 2.50 FISH N DFAL INT2 Pull out of open hole to 20,070' MD (80' into casing). Notes: - POH @ 45 fpm - Pumping out was NOT required. - Rotation was not required. - Pickup weights below predicted as per PERFORM engineer. - Overpulls occurred beginning at 20,850' MD until 20,300' MD. - Most significant overpulls were between 20,850 - 20,500, which correlates to the BHA being pulled through a 2+ degree dog leg. Once the BHA cleared the dog leg, minimal overpull was observed. 19:30 - 20:30 1.00 FISH N DFAL INT2 - Monitor well 10 minutes. - Pump dry job. - Blow down mud lines. - Drop hollow rabbit on joint #208. 20:30 - 23:30 3.00 FISH N DFAL INT2 Continue to POOH from 20,070' MD to 16,008' MD. - POH @ 45 fpm 23:30 - 00:00 0.50 FISH N DFAL INT2 - PJSM - Change equipment from 5-7/8" handling equipment to 5". 4/6/2004 00:00 - 01 :00 1.00 FISH N DFAL INT2 - PJSM - Change equipment from 5-7/8" handling equipment to 5". 01 :00 - 02:30 1.50 FISH N DFAL INT2 - PJSM - Lay down 48 joints of 5" DP into the pipe shed. 02:30 - 11 :30 9.00 FISH N DFAL INT2 - POOH with 5" DP. 11 :30 - 13:00 1.50 FISH N DFAL INT2 - Monitor well. - Lay down HWDP and BHA #17. - Freeze protect 9-5/8" x 13-318" annulus with 125 bbls of Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRfLL+COMPLETE NABORS ALASKA DRILLING f NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 416/2004 11 :30 - 13:00 1.50 FISH N DFAL INT2 heated diesel. 13:00 - 14:00 1.00 FISH N DFAL INT2 - Clear rig floor. 14:00 - 14:30 0.50 FISH N DFAL INT2 - Inspect and service wear ring. 14:30 - 15:00 0.50 CASE P INT2 - Rig up casing running equipment. 15:00 - 21 :00 6.00 CASE P INT2 - RIH with 7" 26# L-80 Hydril 521 liner @ controlled running speeds. Notes: - 49 joints - 3 joint shoe track - ZXP packer, HRD liner rotating assembly, double grip hanger, and debris screen. 21 :00 - 21 :30 0.50 CASE P INT2 - Rig down liner running equipment. - Pump 1 liner volume at 4.5 bpm 1250 psi. 21 :30 - 00:00 2.50 CASE P INT2 - RIH with 7" liner on 5" DP to 3900' MD @ controlled runing speeds. Notes: - No bobble at 497' or 3400' MD. - Fill pipe every 10 stands. 417/2004 00:00 - 01 :00 1.00 CASE P INT2 - Circulate one pipe volume at 3900' MD. 01 :00 - 12:00 11.00 CASE P INT2 - RIH with 7" liner on 5" DP to 16,225' MD @ controlled running speeds. Notes: - Running speeds of 60 fpm to 14,000' and 45 fpm to shoe. - Fill pipe every 10 stands. 12:00 - 13:30 1.50 CASE P INT2 - Change out handling equipment for 5-7/8" DP. - Blow down top drive. 13:30 - 19:30 6.00 CASE P INT2 - RIH with 7" liner on 5" DP to 19,999' MD @ controlled running speeds. Notes: - Running speeds of 45 fpm. - Fill pipe every 10 stands. 19:30 - 21 :30 2.00 CASE P INT2 - Circulate one pipe volume at shoe. Notes: - Established circulation at 0.5 bpm, increasing to 5.5 bpm with 1160 psi. . PU 310k; SO 190k. 21 :30 - 00:00 2.50 CASE P INT2 . RIH with 7" liner to 21,650' MD. Notes: - Stacked up 120k at pressure transition zone in Kingak. - Picked up to 320k, unable to achieve free point. - Stood back stand. Picked up a single from pipe shed. - Picked up and pulled free with 350k. 4/8/2004 00:00 - 02:30 2.50 CASE N DPRB INT2 Washed and Reamed through tight spot from 21650' - 21665' md. Notes: 1. Stacked up at 21650' md after taking 50K weight from 170K Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/8/2004 00:00 - 02:30 2.50 CASE N DPRB INT2 SOW to 120K stack up weight. - Occurred immediately after making connection. - Unable to pick up to free point -- stand back stand and PU single from pipe shed. - PU to free point with 350K. 2. 3 addtional slack off attempts while determining tight spot and not a ledge -- this is the pressure transition at base of Kingak shale. - Slack off to 100K and pull free with 375K (25K overpull). . Slack off to 80K and pull free with 400K (50K overpull). - Slack off to 80K and pull free with 405K (55K overpull). 3. Establish circulation -- 1/2 bpm with 1200 psi. Gradually increase rate to 2 bpm with 1075 psi. 4. Establish rotation @ 24 rpm with 22K ft. Ibs. torque. 02:30 - 03:00 0.50 CASE N DPRB INT2 Ream from 21610'·21680' md. Notes: 1. Experienced 6 to 7K ft. Ibs reactive torque from 21650' to 21655' md. 2. Torque smoothed out thereafter indicating good hole. 03:00 - 04:00 1.00 CASE P INT2 Wash f/ 21680' - 21930' md -- precautionary washing to condition mud with no hole problems experienced. 04:00 - 04:45 0.75 CASE P INT2 Make up single, 10' pup and rotating cementing head -- rig up extra 25' of cementing hose. 04:45 - 05:00 0.25 CASE P INT2 Wash f/21930' - 21945' md -- 12 feet below the top of Sag River formation @ 21933' md. Notes: Stacked up with 10K, 20K, 30K, 40K and 50K in attempt to wash down in rathole. No signs of pressure increase, losses or packing off while each successive PU required additional overpull to free pipe -- directional driller suggested this was the depth that Rhino reamer had enlarged the hole. Coincidently, this is also the depth the cleanout run was stopped with no attempts to advance below this point with the 8-1/2" bit. 05:00 - 07:45 2.75 CASE P INT2 Gradually increase circulation rate to 6 bpm in preparation for cementing the 7" liner. 07:45 - 08:00 0.25 CEMT P INT2 Line up Halliburton, pump 5 bbls of Alpha Spacer and Pressure test cement lines to 4500 psi. 08:00 - 08:45 0.75 CEMT P INT2 Pump remaining 25 bbls of Alpha Spacer followed by 125 bbls (456 sxs) of Premium G Cement with Additives as described in cementing report. 08:45 - 10:00 1.25 CEMT P INT2 Displace wiper dart, latch and bump plug with 4200 psi to set hanger and release running tool. Note: Bumped plug with 5281 strokes @ 99.5% pump efficiency. 10:00 - 10:30 0.50 CASE P INT2 Set Hanger, Check Floats and Set Packer -. 7" shoe set @ 21945' md (12' below top of Sag) and Top of 7" liner is @ 19949' md. Note: Packer set with 100K down weight .- pins sheared at 140K slack off with 60K down weight. Establish rotation @ 16 Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/8/2004 10:00 - 10:30 0.50 CASE P INT2 rpm and slacked off 80K to ensure packer was set. 10:30 - 13:30 3.00 CEMT P INT2 Release liner running tool and circulate approximately 25 bbls of cement to surface with 12 bpm (140 spm and 250 fpm AV between 5" inside 9-5/8" casing). 13:30 - 14:30 1.00 CASE P INT2 Lay down rotating liner cementing head in pipe shed -- BID all lines. 14:30 - 16:00 1.50 CASE P INT2 Slip and Cut drilling line. 16:00 - 17:00 1.00 CASE P INT2 Service Top Drive, Crown and Drawworks. 17:00 - 21 :30 4.50 CASE P INT2 POOH with 5-7/8" drill pipe. 21 :30 - 22:30 1.00 CASE P INT2 Change over to 5" dp handling equipment. 22:30 - 00:00 1.50 CASE P INT2 POOH with 5" drill pipe to 12100' md. 4/9/2004 00:00 - 04:30 4.50 CASE P INT2 Finish POOH with liner running tool on 5" dp. 04:30 - 05:00 0.50 CASE P INT2 Inspect and lay down liner running tool. Note: Dog Sub Shear and no sign of damage to running tool. Tool was caked with thick heavy wall cake and formation. 05:00 - 06:00 1.00 CASE P INT2 PU rotating liner cement head from pipe shed and make service breaks. Lay Down in pipe shed. 06:00 - 06:45 0.75 CASE P INT2 Clean Rig Floor while preparing equipment for BOPE Test. 06:45 - 07:30 0.75 CASE P INT2 PJSM for BOPE Test -- Pull Wear Ring and run Test Plug. Notes: 1. Wear Ring shows 1/2" to 3/4" grooves from pipe wear as tool joints run through it due to misalignment of the wellhead. 2. Not a show stopper; however will need to address rig alignment over hole prior to running completion. 07:30 - 16:00 8.50 CASE P INT2 Test BOPE -- 5-718", 5" and 4" dp sizes. Note: AOGCC field inspector Jeff Jones waived witness @ 3 pm on 4/8/04. 16:00 - 16:30 0.50 CASE P INT2 Pull Test Plug and install Wear Ring. 16:30 - 18:00 1.50 CASE P INT2 Close blinds and test 9-5/8" casing and 7" liner to 3000 psi for 30 minutes. 18:00 - 20:30 2.50 CASE P INT2 MU 6-1/8" BHA #18 as per DD -- Load Neutron Source and C/O elevators. 20:30 - 21 :00 0.50 CASE P INT2 Shallow test the MWD/LWD with water from pipe rack. 21 :00 - 00:00 3.00 CASE P INT2 RIH while PU 6 joints of 4" hwdp and 69 joints of 4" dp. 4/10/2004 00:00 - 05:45 5.75 CASE P INT2 RiH with 5" dp (fill every 30 stds). 05:45 - 07:30 1.75 CASE P INT2 Change over to 500 ton handling equipment for 5-7/8" dp. 07:30 - 12:00 4.50 CASE P INT2 RiH with 5-7/8" drill pipe to 21532' md. 12:00 - 13:00 1.00 CASE P INT2 Wash f/21532' - 21819' and tag LC -- no cement. 13:00 - 16:00 3.00 CASE P INT2 Circulate heavy weight mud (16 ppg at one point) while drilling the LC, FC and shoe track to FS. 16:00 - 23:00 7.00 CASE P INT2 Displace well to 9.1 BARADRILn drilling fluid. Notes (Displacement went very well): 1. Pumped @ 280 gpm -- limit for motor as per DD. 2. Rotated at 70 rpm with 30k ft.-Ibs. torque -- no excessive shocks measured at Anadrill components. 3. Reciprocated pipe full strokes through out displacement. 4. Pumped 100 bbl Hi-Vis Sweep + 75 bbl sea water sweep + 50 bbl Hi-Vis Sweep. 5. Interface was very minimal -- actually weighed 8.6 ppg fluid Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/10/2004 16:00 - 23:00 7.00 CASE P INT2 with sweep back to surface -- 9.1 ppg to surface on calculated strokes so no channeling obseNed. 23:00 - 00:00 1.00 CASE P INT2 Drill shoe @ 21942' md. 4/11/2004 00:00 - 03:00 3.00 CEMT P INT2 Drill 7" liner float shoe and slide through rathole to 21985' md while pumping 6.5 bpm and attempting to sidetrack past possible grapple junk left in hole from 9-5/8" casing repair work. 03:00 - 04:00 1.00 CASE P INT2 Attempts to drill past 21985' md (TD of 8-1/2" rathole) failed. Notes: 1. Tagging up on junk and stalling motor. 2. Attempted to slide with no advance, PU and establish ROW, slack off and apply 10K WOB in 2K increments until motor stalled -- repeat process x2. 3. Decision to POOH for fishing assembly. 04:00 - 05:00 1.00 CASE N DPRB INT2 Condition Mud and Circulate while mixing dry job -- shut down and monitor well for 15 minutes -- static. Pump dry job and BID lines. 05:00 - 08:45 3.75 CASE N DPRB INT2 POOH to 16814' md -- dry job didn't take. 08:45 - 09:30 0.75 CASE N DPRB INT2 PJSM -- Change out handling equipment f/5-7/8" to 5". 09:30 - 1 0:45 1.25 CASE N DPRB INT2 Slip and Cut drilling line. 10:45 - 12:00 1.25 CASE N DPRB INT2 SeNice Top Drive, Crown and Drawworks. 12:00 - 12:30 0.50 CASE N DPRB INT2 Pump second dry job and blow down lines. 12:30 - 18:00 5.50 CASE N DPRB INT2 Continue POOH to 4" dp at 2566' md. 18:00 - 20:30 2.50 CASE N DPRB INT2 Change out to 4" elevators, monitor well and LD 57 joints of 4" drill pipe. 20:30 - 23:30 3.00 CASE N DPRB INT2 Flush BHA with fresh water, change out to 3-1/2" elvators and LD BHA #18. Notes: 1. Cleared Rig Floor and polled neuclear source from ADN. 2. Bit showed signs of junk damage with 1 chipped insert and junk gouges on cones. Directional Driller sent pictures of bit to town. 23:30 - 00:00 0.50 CASE N DPRB INT2 Clean Rig Floor. 4/12/2004 00:00 - 00:30 0.50 CASE N DPRB INT2 Finish Clearing Rig Floor. 00:30 - 02:15 1.75 CASE N DPRB INT2 MU BHA#19 -- Reverse Circ Globe Basket to fish grapple junk. 02:15 - 03:00 0.75 CASE N RREP INT2 Repair leak on low drum clutch. 03:00 - 04:30 1.50 CASE N DPRB INT2 RiH while PU 4" drill pipe from pipe shed. 04:30 - 10:00 5.50 CASE N DPRB INT2 RiH with 5" dp to f/2206' - 16431' md. 10:00 - 10:45 0.75 CASE N DPRB INT2 Change over to 5-7/8" handling equipment. 10:45 - 15:00 4.25 CASE N DPRB INT2 Continue RiH with 5-718" dp and tag junk @ 21985' md. Note: Oringinal TD of 8-1/2" hole prior to RiH with 7" liner. 15:00 - 16:30 1.50 CASE N DPRB INT2 Drop 7/8" ball to initiate reverse circulation @ globe basket. 16:30 - 17:30 1.00 CASE N DPRB INT2 Engage fish with rotation and circulation (rev circ @ globe basket). Notes: Pump 350 gpm with 2550 psi while rotating 50 rpm with 20 to 25K ft-Ibs torque (0-5K reactive torque) and applying 0 to 10K WOB intermittently. 17:30 - 18:30 1.00 CASE N FLUD INT2 Circ and Cond mud while changing screens to address soaping of screens as surface due to blinding affects of minor signs of Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 411212004 17:30 - 18:30 1.00 CASE N FLUD INT2 saphonification. 18:30 - 19:00 0.50 CASE N DPRB INT2 Engage fish with parameters outlined above. Reactive torque dropped off, made approximately one foot of hole, no reactive torque and unable to make any more hole. Pump pressure is still 2550 psi with 350 gpm. 19:00 - 19:30 0.50 CASE N DPRB INT2 Monitor well, pump dry job and blow down all lines. 19:30 - 22:30 3.00 CASE N DPRB INT2 POOH f/21 ,989' - 17591' md. 22:30 - 23:00 0.50 CASE N DPRB INT2 Pump 2nd dry job. 23:00 - 00:00 1.00 CASE N DPRB INT2 POOH f/17591' - 17107' md. 4/13/2004 00:00 - 00:30 0.50 CASE N DPRB INT2 POH w/5 7/8" DP (wet) 00:30 - 01 :30 1.00 CASE N DPRB INT2 PJSM - C/O bales & elevators to 5" 01 :30 - 03:00 1.50 CASE N DPRB INT2 Cut & slip drilling line. Adjust brakes 03:00 - 04:00 1.00 CASE N DPRB INT2 Lubricate rig, service TD, crown, & drawworks. 04:00 - 08:00 4.00 CASE N DPRB INT2 POH (wet) wI 5" DP 08:00 - 09:00 1.00 CASE N DPRB INT2 Condition mud & circulate. Pump dry job & BID lines 09:00 - 11 :00 2.00 CASE N DPRB INT2 POH wI 5" DP (dry) 11 :00 - 13:00 2.00 CASE N DPRB INT2 Monitor well @ 4" DP. POH wI 4" DP UD singles 13:00 - 13:30 0.50 CASE N DPRB INT2 C/O to 3 1/2" handling equip't 13:30 - 15:00 1.50 CASE N DPRB INT2 Monitor well @ BHA Handle BHA Note: Recovered 3.5 Ibs. of junk inside globe basket. 15:00 - 16:00 1.00 CASE N DPRB INT2 Service TD & drawworks. 16:00 - 16:30 0.50 CASE N DPRB INT2 M/U BHA # 20 after discussing plan forward wI Anchorage. Decision made to run concave mill w/2 boot baskets. 16:30 - 18:00 1.50 CASE N DPRB INT2 CIO to 4" handling equip't & P/U 4" singles & RIH. 18:00 - 00:00 6.00 CASE N DPRB INT2 CIO to 5" handling equip't & RIH wI 5" DP. 4/14/2004 00:00 - 00:45 0.75 CASE N DPRB INT2 C/O bales & elevators to 5 7/8" handling equip't. 00:45 - 03:00 2.25 CASE N DPRB INT2 RIH w/5 718" DP to 21843'. 03:00 - 03:30 0.50 CASE N DPRB INT2 Wash down from 21843' & tag bottom @ 21986' w/4 BPM, 660 psi. 03:30 - 05:30 2.00 FISH N DPRB INT2 Mill from 21986' to 21994' wI varying pump rates & rotary speeds. Work pipe back to shoe in attempts to work any junk down to bottom. No indication of milling on any junk. Notes: - Avg. torque on bottom 19-20K - Pump rates varied from 168 - 320 gpm. - P/U wt 340K, S/O wt 225K, Rt wt 280K 05:30 - 06:15 0.75 FISH N DPRB INT2 Continue circulating & conditioning mud. Note: - Max gas units of 690 on B/U. - Mud weight @ bu reached as high a 9.7 ppg. - Circ untif MWout = 9.2 ppg. 06:15 - 07:15 1.00 FISH N DPRB INT2 POH above shoe & rack back 1 stand DP. Drop ball & rod to open circ sub & pump down @ 5 BPM, 850 psi. 07:15 - 08:00 0.75 FISH N DPRB INT2 Monitor well - pump dry job - BID lines. 08:00 - 11 :00 3.00 FISH N DPRB INT2 POH wl5 7/8" DP. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/14/2004 11 :00 - 12:00 1.00 FISH N DPRB INT2 C/O to 5" handling equip'!. 12:00 - 15:30 3.50 FISH N DPRB INT2 POH wI 5" DP. 15:30 - 16:00 0.50 FISH N WAIT INT2 Lost solar engines at Production module due to false gas alarm. Start rig engines & convert to rig power. 16:00 - 18:00 2.00 FISH N DPRB INT2 Continue POH wI 5" DP. Note: Test choke manifold while POH -- out of critical path. 18:00 - 19:30 1.50 FISH N DPRB INT2 CIO to 4" handling equip't & UD 4" singles. 19:30 - 21 :30 2.00 FISH N DPRB INT2 C/O to 31/2" handling equip't & UD BHA #20. Note: - Mill in gage wI no signs of encountering any significant junk. - No junk marks on any of the tools. - Recovered 5 ozs. of additional small metal fragments in boot baskets. Most pieces are smaller than a dime with 1 piece a little larger than a quarter. - Assorted pieces of formation recovered in boot baskets. - Total of 4 Ibs. recovered 13.5# missing. 21 :30 - 22:00 0.50 FISH N DPRB INT2 Clear & clean rig floor. 22:00 - 22:30 0.50 BOPSUF N DPRB INT2 R/U & pull bowl protector. 22:30 - 00:00 1.50 BOPSUP N DPRB INT2 PJSM - R/U & test BOP's per BP & AOGCC Regs. 4/15/2004 00:00 - 06:00 6.00 BOPSUF N DPRB INT2 Test BOPE per BP & AOGCC Regs to 250 14800 psi wI 4" 5" & 5 7/8" test jts. 06:00 - 06:30 0.50 BOPSUP N DPRB INT2 Pull test plug & install bowl protector. 06:30 - 07:00 0.50 BOPSUF N DPRB INT2 BID choke & kill lines & clear floor. 07:00 - 08:30 1.50 CASE N DPRB INT2 Slip & cut drilling line. Adjust brakes. 08:30 - 11 :00 2.50 CASE N DPRB INT2 MIU BHA #21 11 :00 - 11 :30 0.50 CASE N DPRB INT2 Shallow test MWD & BID lines 11 :30 - 13:30 2.00 CASE N DPRB INT2 P/U 4" DP singles from pipeshed & RIH. 13:30 - 20:00 6.50 CASE N DPRB INT2 CIO to 5" handling equip't & RIH to 16787' filling every 30 stands. 20:00 - 21 :00 1.00 CASE N DPRB INT2 CIO to 5 7/8" handling equip'!. 21 :00 - 00:00 3.00 CASE N DPRB INT2 Continue RIH w/5 7/8" DP to 7" shoe @ 21945' filling every 30 stands. 4/16/2004 00:00 - 03:45 3.75 DRILL P INT2 Orient tool face and Slide f/21994' -- 22015' md. Circ and Cond Mud. Perform FIT to 11.5 ppg EMW. Blow down kill line. 03:45 - 13:00 9.25 DRILL P PROD1 Drill f/21994' - 22261' md. Verified TD with Anch Geologist @ 11206' tvdrkb (50 feet below the OWC). 13:00 - 15:30 2.50 DRILL P PROD1 Mad Pass f/22261' - 21942' md. Pull bit into 7" liner shoe. 15:30 - 16:00 0.50 DRILL P PROD1 RiH to 22261' md -- no hole problems. 16:00 - 16:30 0.50 DRILL P PROD1 Fill DP and circulate 85 bbls -- 1.5x annular capacity to top of 7" liner. Well Static. 16:30 - 17:00 0.50 DRILL P PROD1 Trip bit to inside 7" liner shoe @ 21945' md -- no hole problems (hole fill correct). Blow down top drive and lines. 17:00 - 18:00 1.00 DRILL N DPRB PROD1 Continue POH to 21242' md (hole fill not correct -- last 5 stands should have taken 4.7 bbls and took 2.0 bbls instead). Discovered equalizer valve leaking between trip tanks. 18:00 - 18:30 0.50 DRILL N DPRB PROD1 Pump out trip tanks. Monitor well -- static. 18:30 - 19:00 0.50 DRILL N DPRB PROD1 RIH to TD @ 22261' md. 19:00 - 20:00 1.00 DRILL N DPRB PROD1 Fill drill pipe and circulate 1000 stks. 20:00 - 21 :00 1.00 DRILL N DPRB PROD1 Pump out of hole f/22261' - 21917' md (84 spm @ 1900 psi). Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 411612004 20:00 - 21 :00 1.00 DRILL N DPRB PROD1 Inside 7" shoe. 21 :00 - 00:00 3.00 DRILL N DPRB PROD1 CBUx2 @ 84 spm with 50 rpm (20K ft Ibs torque). Note: 1. Gas cut mud throughout one and one half annular volumes ranging between 2000 and 10000 units. 2. Gas units decreased to less than 400 after 1.3 bu. 4/17/2004 00:00 - 01 :00 1.00 DRILL N DPRB PROD1 Condition mud & circulate above 7" shoe. 7 BPM, 1930 psi, 50 RPM. - Final gas units 58 - Monitor well - static. 01 :00 - 01 :30 0.50 DRILL N DPRB PROD1 RIH to rD & pump 85 bbls @ 8 BPM, 2100 psi, 100 RPM. 01 :30 - 02:00 0.50 DRILL N DPRB PROD1 Pump out of hole to shoe @ 6 BPM. 02:00 - 08:00 6.00 DRILL N DPRB PROD1 Wt up to 9.6 ppg from 9.3 ppg in 1 circulation. Max gas 508 units @ B/U. 08:00 - 08:30 0.50 DRILL N DPRB PROD1 RIH to rD 08:30 - 09:00 0.50 DRILL N DPRB PROD1 Circulate 1000 strokes & displace remaining 9.3 mud wI 9.6 ppg. - 8 BPM, 100 RPM 09:00 - 09:30 0.50 DRILL N DPRB PROD1 Pump out of hole to shoe 09:30 - 11 :30 2.00 DRILL P PROD1 Circulate B/U @ 8 BPM, 1900 psi, 50 RPM. Max gas 200 units. - Dress remaining mud in surface system to 9.6 ppg. 11 :30 - 12:30 1.00 DRILL P PROD1 Monitor well - static 12:30 - 00:00 11.50 DRILL P PROD1 Pump out of hole from 21,917' to 17587' @ 4.5 to 5 BPM, 1000 psi. 4/18/2004 00:00 - 02:00 2.00 DRILL P PROD1 Pump out of hole w/5 7/8" DP. 4.5 to 5 BPM & pulling 2 minutes per stand. 02:00 - 02:30 0.50 DRILL P PROD1 Monitor well - static 02:30 - 03:00 0.50 DRILL P PROD1 C/O bales & elevators to accommodate 5" handling equip't. 03:00 - 12:00 9.00 DRILL P PROD1 POH wI 150 stands 5" DP. Notes: 1) Pulled first 5 stands monitoring trip tank for each stand & ensuring no swab. Displacement correct. 2) Pumped dry job, dropped rabbit, & continued POH. 12:00 - 12:30 0.50 DRILL P PROD1 CIO to 4" handling equip't - fill trip tank. 12:30 - 14:45 2.25 DRILL P PROD1 POH wI 4" DP & UD singles. 14:45 - 15:15 0.50 DRILL P PROD1 Monitor well - static. 15:15 - 17:45 2.50 DRILL P PROD1 UD BHA #21 - unload source. 17:45 - 18:30 0.75 DRILL P PROD1 Clear & clean rig floor. 18:30 - 19:00 0.50 CASE P COMP R/U to run 4 1/2" liner 19:00 - 19:30 0.50 CASE P COMP PJSM for running liner. 19:30 - 21 :15 1.75 CASE P COMP Run 11 jts 41/2" 12.6# 13CR80 Vam Ace liner & fill wI viscosified brine. Note: MIU torque for 41/2" 13CR80 Vam Ace was 3620 ftIlbs. 21 :15 - 22:00 0.75 CASE P COMP R/U 2 7/8" handling equip't 22:00 - 23:30 1.50 CASE P COMP Run 14 jts of 2 7/8" Fox inner string. 23:30 - 00:00 0.50 CASE P COMP C/O elevators & tongs & MIU liner hanger I packer. 4/19/2004 00:00 - 01 :30 1.50 CASE P COMP Change over 2-7/8" to 4" handling equip. MU liner hanger packer assy -- Mix and install PAL mix. Allow to cure for 30 minutes prior to RiH. Correct hole fill. 01 :30 - 03:30 2.00 CASE P COMP RiH with liner while PU 69 jts 4" drill pipe out of the pipe shed. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 411912004 01 :30 - 03:30 2.00 CASE P COMP - Correct hole fill. 03:30 - 04:00 0.50 CASE P COMP Change over 4" to 5" handling equip and fill pipe. - Correct hole fill. 04:00 - 15:15 11.25 CASE P COMP RiH with 150 stands 5" drill pipe out of derrick. - Fill every 10 stands -- correct hole fill. 15:15 - 15:45 0.50 CASE P COMP Change over 5" to 5-7/8" handling equipment to include 500 ton bales. 15:45 - 22:15 6.50 CASE P COMP RiH with 52 stands 5-7/8" drill pipe to just inside 7" liner shoe. - Correct hole fill. 22:15 - 00:00 1.75 CASE P COMP Establish circulation & circulate one drill string + liner volume. - No losses. 4/20/2004 00:00 - 01 :00 1.00 CASE P COMP Stage up pump & circulate string volume @ 7" shoe. Max rate I 6 BPM 1220 psi. P/U wt 340K, S/O wt 220K 01 :00 - 01 :30 0.50 CASE P COMP Continue RIH w/4 1/2" liner from shoe to 22248' 01 :30 - 02:00 0.50 CASE P COMP MIU rotating liner cement head on single jt DP 02:00 - 03:30 1.50 CASE P COMP Wash down liner to rD @ 22261' wI 3/4 BPM, 770 psi. Note: 1) Stage up pump from 3/4 BPM to 6 BPM. FCP @ 6 BPM - 1210 psi. 2) Held PJSM for cement job while circulating. 03:30 - 05:30 2.00 CEMT P COMP Pump 5 bbls 10.6 alpha spacer & test lines to 4200 psi. Pump remaining 55 bbls 10.6 alpha spacer followed by 26 bbls 15.9 ppg type G cement. Drop plug & swap to rig pump & displace wI 25 bbls viscosified brine followed by 383.9 bbls mud. Bump plug wI 4200 psi - 95.4% PIE. S/O wt to set hanger, bleed pressure & check floats. 05:30 - 06:00 0.50 CASE P COMP S/O 65K to set packer x 2. Confirm wI rotation @ 10 RPM & 65K. Unsting from liner w/1 000 psi - increase pump rate once packoff above tie back. 06:00 - 07:30 1.50 CASE P COMP Circulate cement @ 15.7 BPM - 4100 psi. Note: 5 bbls cement back to surface. 07:30 - 08:30 1.00 CASE P COMP UD cementing equip't 08:30 - 09:00 0.50 CASE P COMP PJSM - UD remaining 5 7/8" out of derrick. 09:00 - 11 :00 2.00 CASE P COMP UD 6 stands of 5 7/8" DP out of derrick while waiting to begin displacement to SIW. (G & I injecting mud) 11 :00 - 11 :30 0.50 CASE P COMP PJSM - displace to SIW 11 :30 - 12:00 0.50 CASE P COMP Spot casing washes & sweeps in DP - 70 bbl caustic spacer, 40 bbl dirt magnet, 100 bbl hi vis spacer. 12:00 - 12:30 0.50 CASE P COMP BID TD & mud lines. 12:30 - 14:15 1.75 CASE N WAIT COMP Wait while Prod Ops pumps fluids down NS-10 injection well. 14:15 - 17:30 3.25 CASE P COMP Pump 1700 bbls SIW until two consecutive readings less than 80 NTU 17:30 - 18:30 1.00 CASE P COMP BID top drive & mudline & monitor well. Well static. 18:30 - 20:00 1.50 CASE P COMP PJSM - cut & slip drilling line. 20:00 - 21 :30 1.50 CASE P COMP Service top drive 21 :30 - 22:30 1.00 CASE P COMP POH w/5 7/8" & UD 1 x 1. 22:30 - 23:00 0.50 CASE N RREP COMP Replace rollers on Iron Roughneck. Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 412012004 23:00 - 00:00 1.00 CASE P COMP 4/21/2004 00:00 - 05:00 5.00 CASE P COMP 05:00 - 06:30 1.50 CASE P COMP 06:30 - 09:30 3.00 CASE P COMP 09:30 - 11 :00 1.50 CASE P COMP 11 :00 - 12:00 1.00 CASE P COMP 12:00 - 12:30 0.50 CASE P COMP 12:30 - 19:15 6.75 CASE P COMP 19:15 - 20:30 1.25 CASE P COMP 20:30 - 22:30 2.00 CASE P COMP 22:30 - 23:00 0.50 CASE P COMP 23:00 - 23:30 0.50 CASE P COMP 23:30 - 00:00 0.50 BOPSUF P COMP 4/22/2004 00:00 - 01 :00 1.00 CASE P COMP 01 :00 - 01 :30 0.50 CASE P COMP 01 :30 - 03:30 2.00 RUNCOtvP COMP 03:30 - 05:30 2.00 RUNCOtvP COMP 05:30 - 06:00 0.50 RUNCOtvP COMP 06:00 - 08:00 2.00 RUNCOtvP COMP 08:00 - 10:00 2.00 RUNCOIItP COMP 10:00 - 10:30 0.50 RUNCOIItP COMP 10:30 - 11 :00 0.50 RUNCOIItP COMP 11 :00 - 12:30 1.50 RUNCOIItP COMP 12:30 - 13:00 0.50 RUNCOtvP COMP 13:00 - 20:30 7.50 RUNCOtvP COMP 20:30 - 22:00 22:00 - 00:00 1.50 RUNCO~ 2.00 RUNCOtvP RREP COMP COMP POH w/5 7/8" & UD 1 x 1. POH w/5 7/8" DP UD 1 x 1. RID 5 7/8" handling equip't & swap over to 5". POH wI 5" DP UD 1 x 1. R/U & test 9 5/8" x 7" x 4 1/2" casing to 4200 psi & hold for 30 min. RID & BID test equip't. POH wI 5" DP UD 1 x 1. Service Iron roughneck. POH wI 5" DP UD 1 x 1. CIO to 4" handling equip't & rack back 23 stds. 4" DP. R/U 2 7/8" handling equip't, UD liner hanger running tool, & 14 jts 2 7/8" inner string. Note: Rotating dog sub on running tool was sheared indicating wt. was transferred to set packer. RID 2 7/8" handling equip't. P/U rotating cement head & break out 15' pup jt & TIW valve. Pull bowl protector & install junk catcher. Flush stack & retrieve junk catcher. Recovered _ 2 gal solids. Clean junk catcher & clear floor. R/U casing tools R/U Gatorhawk & run tailpipe ass'y & packer. Lubricate rig. Bring Weatherford equip't to rig floor. Spot Weatherford units in front of VLE & power up. PJSM for hanging sheave in derrick. Hang sheave in derrick for fiberoptics cable. Run Cidra mandrel & connect fiberoptics cable & test to 7500 psi R/U scaffolding. - Run jts 1 - 53 - (2,344 ft) 41/2" 13CR80 12.6# Vam Ace tubing. - MIU torque - 3620 ft/lbs. utilizing torque turn - Testing wI Gatorhawk - 5500 psi external connection wI nitrogen. - Weatherford running fiberoptics cable & securing wI Canon clamps - Using API modified thread compound on all connections per Vam PTS Reps who are on location inspecting threads & assisting NAD casing. - Kicked out Jts 42 & 46 in pipeshed - suspect threads. Troubleshoot & repair casing tongs. - Run jts 54 - 71 (3,104 ft) 41/2" 13CR80 12.6# Yam Ace tubing. - MIU torque - 3620 ft/lbs. utilizing torque turn. - Testing wI Gatorhawk - 5500 psi external connection wI nitrogen. - Weatherford running fiberoptics cable & securing wI Canon clamps. - Using API modified thread compound on all connections per Vam PTS Reps who are on location inspecting threads & Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/22/2004 22:00 - 00:00 2.00 RUNCOrvP COMP assisting NAD casing. 4/23/2004 00:00 - 23:30 23.50 RUNCm,p COMP Run 201 jts 41/2" 13 CR80 12.6# Vam Ace tubing from 3104' to 11,631'. - MIU torque - 3260 tVlbs. utilizing torque turn. - Testing wI Gatorhawk - 5500 psi external connection. - Weatherford running fiberoptics cable & securing wI Canon clamps. - Using API modified thread compound on all connections per Vam PTS Reps who are on location inspecting threads & assisting NAD casing. - Kicked out jts 109 & 110. 109 galled box & 110 galled pin. 23:30 - 00:00 0.50 RUNCOMP COMP Lubricate rig. 4/24/2004 00:00 - 11 :30 11.50 RUNCOMP COMP Run 101 jts 4 1/2" 13CR80 12.6# Vam Ace tubing from 11631' to 15974'. - MIU torque - 3620 fVlbs utilizing torque turn. - Testing wI Gatorhawk - 5500 psi external connection. - Weatherford running fiberoptics cable & securing wI Canon clamps. - Using API modified thread compound on all connections per Vam PTS Reps who are on location inspecting threads & assisting NAD casing. - Replaced gas lift mandrel - did not test wI Gatorhawk. Replaced collar on top pup on 2nd gas lift mandrel. 11 :30 - 12:00 0.50 RUNCOrvP COMP Lubricate rig. 12:00 - 17:30 5.50 RUNCOrvP COMP Continue running 41/2" completion from 15974' to 18222', Jts 376 - 428. 17:30 - 18:00 0.50 RUNCOrvP COMP Shut down for dinner. 18:00 - 22:30 4.50 RUNcm,p COMP Continue running 41/2" completion from 18222' to 20046' Jts. 429 - 471. Note: Did not see wt. fluctuation as rotating muleshoe entered 7" liner top @ 19949'. 22:30 - 23:00 0.50 RUNCmlJ'J SFAL COMP Repair Gatorhawk equip't. 23:00 - 23:30 0.50 RUNCOrvP COMP Continue running 4 1/2" competion from 20046' to 20258'. Jts 472 - 476. 23:30 - 00:00 0.50 RUNCOrvP COMP Grease blocks. 4/25/2004 00:00 - 01 :30 1.50 RUNCOrvP COMP Run 12 jts 41/2" 13CR80 12.6# Vam Ace tubing from 20258 ' to 20766'. Jts 477 - 488 - MIU torque 3620 ft/lbs utilizing torque turn. - Testing wI Gatorhawk - 5500 pssi external connection. - Weatherford running fiberoptics cable & securing wI Canon clamps. - Using API modified thread compound on all connections per Vam PTS Reps who are on location inspecting threads & assisting NAD casing. 01 :30 - 02:00 0.50 RUNCOrvP COMP C/O elevators - 125T for 200T. 02:00 - 02:30 0.50 RUNCOrvP COMP PJSM - rigging up control line. I I Printed: 4/30/2004 1 :42:55 PM Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: NS21 NS21 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 33E Start: 11/14/2002 Rig Release: Rig Number: 33E Spud Date: 11/16/2002 End: 4/25/2004 02:30 - 03:00 0.50 RUNCOrvP COMP R/U single control line & connect to TRSV. Test to 6000 psi & hold for 15 min. 03:00 - 06:00 3.00 RUNCOMP COMP Continue running 41/2" competion from 20781' to 21777'. Jts 489 - 512. Tag up inside of 4 1/2" 11.80' liner tie back wI 15K. 06:00 - 06:30 0.50 RUNCOrvP COMP Space out by removing jts. 512 & 511. No pup jts required. WLEG 5.90' inside liner tie back. 06:30 - 08:30 2.00 RUNCOrvP COMP Terminate control line & splice fiberoptics cable. 08:30 - 09:30 1.00 RUNCOrvP COMP Land tubing hanger wI WLEG @ 21,771' & test body seals to 5500 psi 09:30 - 12:00 2.50 RUNCOI\¡f\J DPRB COMP Drop 1 7/8" ball & rod to set packer. Ball & rod did not get to XN nipple due to hole angle. 12:00 - 13:00 1.00 RUNCOMP COMP PJSM - RID landing jt & install BPV. 13:00 - 15:00 2.00 RUNCOrvP COMP PJSM - RID completion equip' - Gatorhawk, Weatherford, & HES & clear floor. 15:00 - 17:00 2.00 RUNCOrvP COMP PJSM - NID BOP stack & rack back in cradle. 17:00 - 22:00 5.00 RUNCOMP COMP Make final termination @ hanger wI fiberoptcs cable & control line. Note: C/O bales & upper & lower IBOP in preparation for NS 32. 22:00 - 23:30 1.50 RUNCOMP COMP N/U dry hole tree & test to 5K for 15 min. Close TRSV & pull BPV. 23:30 - 00:00 0.50 RUNCOI\¡f\J DPRB COMP R/U slickline to push ball & rod to XN nipple. 4/26/2004 00:00 - 00:30 0.50 RUNCOI\¡f\J DPRB COMP PJSM - R/U slickline. 00:30 - 02:00 1.50 RUNCOI\¡f\J DPRB COMP R/U slickline & test lubricator & wireline valve to 1500 psi. 02:00 - 06:30 4.50 RUNCOI\¡f\J DPRB COMP RIH wI slickline to push ball & rod to XN nipple @ 21,758 ft POH & RID slickline. 06:30 - 07:30 1.00 RUNCOrvP COMP R/U lines to set packer. 07:30 - 10:00 2.50 RUNCOI\¡f\J SFAL COMP Test lines to 4200 psi. Repair leak on kill line & cap on dry hole tree. 10:00 - 12:00 2.00 RUNCOrvP COMP - Set packer & test tubing to 4200 psi & hold for 30 min. - Bleed tubing to 3000 psi & test annulus to 4200 psi for 30 min. Maintain 1200 psi differential throughout. - Bleed off pressure & shear RP in lower GLM. Pump to confirm. 12:00 . 13:30 1.50 RUNCOrvP COMP R/U to freeze protect - test lines to 1500 psi. 13:30 - 14:00 0.50 RUNCOrvP COMP Pump 25 bbls sea water wI 4 drums EC1124A corr inhibitor & 4 drums 01VD121 corr inhibitor. 14:00 - 22:30 8.50 RUNCOfIIP COMP Pump freeze protect @ 1.2 BPM ( 470 bbls diesel) to 4000' TVD 22:30 - 00:00 1.50 RUNCOrvP COMP U-tube to balance. Note: Prepare rig for move to NS32. 4/27/2004 00:00 - 06:00 6.00 RUNCOrvP COMP Continue U-tubing diesel. 06:00 - 07:30 1.50 WHSUR P COMP Shut SSSV. Blow down U-tubing lines. Set BPV. 07:30 - 09:00 1.50 RIGD P COMP Clean out trip tanks and prep to move to NS32. Released Rig at 0900 hrs. Printed: 4/30/2004 1 :42:55 PM . . Well: Field: API: Permit: NS21 Northstar Unit 50-029-23126-00-00 202-218 Accept: Spud: Release: Rig: 11-16-02 11-16-02 04-27 -04 Nabors 33E POST-RIG WORK OS/23/04 PULLED SHEAR VALVE FROM 13,694' SLM SET NEW SHEAR VALVE (2000# DIFFERENTIAL TO SHAER FROM I.A. TO TUBING) BACK IN. ATTEMPTED TO PULL RHC PLUG @ 21711' SLM, UNSUCCESSFUL. RAN 3.5" U.B. TO 21711' SLM, LIB INDICATES VALVE IN THE RHC OS/25/04 PULLED 1" SHEAR VALVE FROM RHC PLUG @ 21711' SLM. SET 1" SHEAR VALVE (2000# SHEAR) (BK-5 FLOW THROUGH LATCH) IN GLM #1 @ 13696' SLM. OS/26/04 PRESSURE TESTED I.A. TO 200 PSI TO VERIFY SHEAR VALVE IS IN PLACE. OS/28/04 PULLED RHC PLUG FROM 21,711' SLM. PLUG HAS WHAT APPEARS TO BE A PIN FROM A CONTROL LINE PROTECTOR INSIDE. OS/29/04 DRIFTED TO 22,200' SLM WIA 12' X 2.875" DUMMY GUN W 3' OF 3.5 ROLLERS & S.BAILER BOTTOM WAS REAL STICKY 06/01/04 RAN PDC LOG (GR/CCL) TAGGED BOTTOM @ 22,268' ELM. (PU WEIGHT OFF BOTTOM WAS -4000 LBS) 06/04/04 RIG-UP AND BEGIN GYRO-GR-CCL SURVEY FROM SURFACE TO TD. 06/05/04 CONTINUED FROM PREVIOUS DAY - FINISHED RUNNING GYRO SURVEY WI GR-CCL FROM TD TO SURFACE. GYRO DATA TO PROCESS AND SEND TO NS SPE BY MONDAY. 06/13/04 PERFORATED 40 FEET IN TWO RUNS. INTERVAL PERFORATED WAS 22224'-22264' MD REF. PDC LOG DATED 1-JUN-04. ALL GUNS WERE 20 FOOTX2.88 IN. 6-SPF HMX PJ2906 HSD GUNS TAGGED TD ON ALL RUNS AT 22270' MD. 06/14/04 PERFORATED 40 FEET IN TWO RUNS. INTERVAL PERFORATED WAS 22184'-22224' MD REF. PDC LOG DATED 1-JUN-04. ALL GUNS WERE 20 FOOTX2.88 IN. 6-SPF HMX PJ2906 HSD GUNS TAGGED TD ON ALL RUNS AT 22270' MD. TURNED OVER WELL TO OPERATIONS FOR PSSR AND POP. 06/30/04 MOBILIZE FESCO CREW TO NSTAR FOR SCALE INHIBITOR PREPARATION. LOAD AND HEAT 240 BBLS SEA WATER IN FOR UPCOMING SCALE INHIBITOR TREATMENT NS21 Page 2 . . 07/01/04 PUMP SCALE INHIBITION TREATMENT AS PER PLAN. ALLOWED TREATMENT TO SOAK FOR 1 HR. POP WELL AND FLOW BACK TREATMENT. 07/29/04 ICE FOUND IN TREE (SSV & MASTER VALVE FROZEN) ON ARRIVAL. THAW TREE AND CLEAR TREE WITH NEAT METHANOL. 07/30/04 DRIFT W /3.81" GR TO 3000' SLM. SET 4.5" XN CATCHER SUB AT 21710' SLM. PULL 1" SHEAR VALVE F/ GLM @ 13695' SLM. ATTEMPT TO SET 1" DGLV IN STATION #1 AT 13695' SLM. POH W/ DGLV. 08/01/04 SET 1" DGLV IN STATION #1 @ 13695' SLM. PULL 4.5" CATCHER SUB. BLEED DOWN IA.. 08/02104 RAN SCHLUMBERGER 'SCMT' CEMENT BOND LOG TOOL. MADE 30'/MINUTE UP PASSES FROM TO @ 22284' SLM TO 22640' SLM. MADE 5 MINUTE STATIC STOP @ TO @ 22284' SLM. ACQUIRED GOOD DATA. NOTE: LOST HALF OF ONE CENTRALIZER ARM IN HOLE. 7.38" X 1.0" X 0.5". 2,090 (psi, 2.51 (ppg) 7,278 (psi: 5.00 (ppg) 6,552 (psi) 11.50 (ppg) 7,278 (psi) 15.00 (ppg) . . Printed: 4/30/2004 1 :42:46 PM 570 (psi ,190 (psi ,310 (psi ,190 (psi 9.10 (ppg) 2.55 (ppg) 9.20 (ppg) 12.55 (ppg) 3,215.0 (ft 9,338.0 (It; 0,969.0 (ft) 9,338.0 (ft) 4,621.0 (ft 20,227.0 (It; 22,015.0 (ft) 20,227.0 (ft) Legal Name NS21 Common Name: NS21 'estDêlte 3/9/2004 FIT 3/27/2004 FIT 4/16/2004 FIT 3/27/2004 FIT A Gyrodata Directional Survey for BP EXPLORATION Lease: Northstar, Well: NS-21 . Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 \.A)~ ~ ......J' v ~1 ~'(..c.., ~ Run Date: 6/07/2004 3:42:17 PM ) j ~II\.-L .L C \J >- wk~ c:..~ I ~ \ >~ Co .,,,Jcl.. Surveyor: Steve Thompson; Jamie McCrimmon Calculation Method: MINIMUM CURVATURE Survey Latitude: 70.491296 deg. N Longitude: 148.693311 deg. E Well Head Location - From Local Horizontal Reference: N 6031021.48 ft. E 659827.31 ft. Azimuth Correction: Gyro: Bearings are Relative to True North . Proposed Well Direction: 310.000 deg Vertical Section Calculated from Well Head Location Closure Calculated from Well Head Location Horizontal Coordinates Calculated from Well Head Location A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED DEPTH feet IN C L AZIMUTH deg. deg. 25 ft. VERTICAL SECTION feet DOGLEG SEVERITY deg./ VERTICAL DEPTH feet HORIZONTAL COORDINATES feet 0.00 0.00 0.00 0.0 0.00 0.00 0.00 N 0.00 E -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- . 0- 22236.8 FT. RATE GYROSCOPIC MULTISHOT SURVEY ALL MEASURED DEPTHS AND COORDINATES REFERENCED TO K.B. ELEVATION OF 56.19 FT. PER BP REPRESENTATIVE ----------------------------------------------------------..----------...---------------------------------------------------------------------------------------------------..._----------------------- 100.30 1.43 260.05 0.8 0.36 100.29 0.22 S 1.23W 200.10 1.79 278.80 2.9 0.16 200.05 0.19 S 4.00W 300.00 1.96 296.11 5.9 0.15 299.90 0.80 N 7.08W 399.80 2.03 310.48 9.4 0.13 399.64 2.70 N 9.95W 500.00 2.36 331.47 13.1 0.22 499.77 5.66 N 12.29W 599.60 3.83 336.77 17.9 0.38 599.22 10.52 N 14.58W 700.50 4.72 337.50 24.6 0.22 699.84 17.45 N 17.50W 799.50 5.45 335.55 32.5 0.19 798.45 25.49 N 21.00W 899.80 7.79 324.84 43.4 0.66 898.07 35.39 N 26.89W 1000.10 10.20 320.99 58.6 0.62 997.13 47.85 N 36.39 W 1099.80 12.54 319.65 78.0 0.59 1094.87 62.96 N 48.96W . 1200.00 15.20 323.49 101.5 0.70 1192.14 81.81 N 63.82 W 1225.00 15.44 324.73 107.9 0.41 1216.25 87.16 N 67.69W 1250.00 15.69 325.59 114.4 0.34 1240.34 92.67 N 71.53W 1275.00 16.02 326.12 120.9 0.36 1264.39 98.32 N 75.36 W 1300.00 16.58 326.48 127.7 0.57 1288.38 104.16 N 79.25W 1325.00 17.38 326.40 134.7 0.80 1312.29 110.24 N 83.29 W 1350.00 18.29 325.88 142.0 0.92 1336.09 116.60 N 87.55W 1375.00 19.29 325.08 149.8 1.03 1359.76 123.23 N 92.12W 1400.00 20.27 324.28 158.0 1.02 1383.28 130.14 N 97.01 W 2 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED DEPTH feet I N C L AZIMUTH deg. deg. 25 ft. VERTICAL SECTION feet DOGLEG SEVERITY deg.l VERTICAL DEPTH feet HORIZONTAL COORDINATES feet 1425.00 20.96 323.74 166.5 0.72 1406.68 137.26 N 102.18W . 1450.00 21.61 323.24 175.3 0.67 1429.98 144.55 N 107.58W 1475.00 22.16 322.82 184.4 0.57 1453.17 152.00 N 113.19W 1500.00 22.54 322.55 193.7 0.39 1476.30 159.56 N 118.95W 1525.00 22.92 322.26 203.1 0.40 1499.35 167.21 N 124.84 W 1550.00 23.16 322.10 212.7 0.25 1522.36 174.94 N 130.84 W 1575.00 23.55 321.80 222.4 0.41 1545.31 182.74 N 136.95 W 1600.00 24.15 321.35 232.3 0.63 1568.18 190.66 N 143.24 W 1625.00 24.73 320.96 242.4 0.60 1590.94 198.72 N 149.72W 1650.00 25.43 320.40 252.8 0.74 1613.58 206.92 N 156.44 W 1675.00 25.96 319.96 263.5 0.56 1636.11 215.24 N 163.38W 1700.00 26.54 319.57 274.4 0.61 1658.53 223.68 N 170.52 W 1725.00 27.24 319.16 285.6 0.72 1680.83 232.26 N 177.89W 1750.00 27.94 318.95 297.0 0.71 1702.98 241.01 N 185.47W 1775.00 29.00 318.80 308.8 1.06 1724.96 249.98 N 193.31W 1800.00 29.89 318.84 320.9 0.89 1746.73 259.23 N 201.40W . 1825.00 30.63 319.03 333.4 0.75 1768.32 268.73 N 209.68W 1850.00 31.21 319.22 346.1 0.59 1789.77 278.45 N 218.09W 1875.00 31.36 319.23 358.9 0.15 1811.14 288.28 N 226.57 W 1900.00 31.35 319.28 371.7 0.03 1832.48 298.13 N 235.06W 1925.00 31.23 319.36 384.5 0.13 1853.85 307.98 N 243.52W 1950.00 31.26 319.41 397.3 0.04 1875.22 317.82 N 251.96W 1975.00 31.40 319.42 410.1 0.14 1896.58 327.70 N 260.42 W 2000.00 31.70 319.36 423.0 0.30 1917.88 337.63 N 268.93 W 3 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 ft. 2025.00 32.42 319.15 436.1 0.73 1939.07 347.68 N 277.59W . 2050.00 33.27 318.79 449.5 0.87 1960.07 357.91 N 286.49W 2075.00 33.99 318.35 463.2 0.76 1980.89 368.29 N 295.66W 2100.00 34.68 317.89 477.2 0.74 2001.53 378.79 N 305.07W 2125.00 35.35 317.41 491.4 0.72 2022.01 389.39 N 314.73W 2150.00 36.08 316.85 505.9 0.80 2042.30 400.08 N 324.66W 2175.00 36.65 316.40 520.6 0.63 2062.44 410.86 N 334.84 W 2200.00 37.13 315.89 535.5 0.57 2082.43 421.68 N 345.24 W 2225.00 37.75 315.16 550.6 0.76 2102.28 432.52 N 355.89W 2250.00 38.65 314.15 566.1 1.10 2121.93 443.39 N 366.89W 2275.00 39.60 313.25 581.8 1.11 2141.32 454.28 N 378.29W 2300.00 40.39 312.85 597.8 0.83 2160.47 465.25 N 390.03 W 2325.00 41.39 312.63 614.2 1.01 2179.37 476.36 N 402.05 W 2350.00 42.40 312.56 630.9 1.01 2197.98 487.66 N 414.34 W 2375.00 43.01 312.64 647.8 0.61 2216.35 499.13 N 426.82 W 2400.00 43.40 312.70 664.9 0.39 2234.57 510.73 N 439.41 W . 2425.00 43.82 312.76 682.1 0.42 2252.68 522.43 N 452.08 W 2450.00 44.49 312.83 699.5 0.67 2270.61 534.27 N 464.85 W 2475.00 45.22 312.86 717.1 0.73 2288.33 546.26 N 477.78W 2500.00 45.92 312.85 735.0 0.70 2305.84 558.40 N 490.87W 2525.00 46.58 312.81 753.0 0.66 2323.12 570.68 N 504.11 W 2550.00 47.27 312.77 771.2 0.69 2340.20 583.08 N 517.51 W 2575.00 47.99 312.74 789.7 0.72 2357.04 595.62 N 531.08W 2600.00 48.92 312.87 808.4 0.94 2373.62 608.33 N 544.80W 4 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 2625.00 49.95 313.05 827.3 1.04 2389.88 621.28 N 558.70W 2650.00 50.72 313.10 846.6 0.77 2405.84 634.42 N 572.76W . 2675.00 51.62 313.04 866.0 0.90 2421.51 647.72 N 586.99W 2700.00 52.47 312.91 885.7 0.86 2436.89 661.16 N 601.41 W 2725.00 53.30 312.75 905.6 0.84 2451.98 674.71 N 616.03W 2750.00 54.26 312.53 925.8 0.98 2466.75 688.37 N 630.87 W 2775.00 55.14 312.34 946.1 0.89 2481.19 702.14 N 645.92W 2800.00 56.19 312.16 966.8 1.06 2495.29 716.02 N 661.21 W 2825.00 57.07 312.04 987.6 0.89 2509.05 730.01 N 676.70W 2850.00 57.56 311.89 1008.7 0.51 2522.55 744.08 N 692.34 W 2875.00 58.25 311.49 1029.8 0.77 2535.83 758.17 N 708.16W 2900.00 59.15 310.89 1051.2 1.04 2548.82 772.24 N 724.23 W 2925.00 59.99 310 .40 1072.7 0.94 2561.48 786.28 N 740.59W 2950.00 60.58 310.16 1094.5 0.63 2573.87 800.32 N 757.l5W 2975.00 61.00 310.01 1116.3 0.44 2586.07 814.37 N 773.85 W 3000.00 61.56 309.78 1138.2 0.60 2598.09 828.43 N 790.67 W . 3025.00 62.23 309.50 1160.2 0.71 2609.86 842.50 N 807.65W 3050.00 63.17 309.16 1182.5 0.99 2621.33 856.58 N 824.83W 3075.00 64.17 308.85 1204.9 1.04 2632.42 870.68 N 842.25 W 3100.00 65.08 308.60 1227.4 0.94 2643.13 884.81 N 859.87W 3125.00 65.81 308.41 1250.2 0.75 2653.52 898.96 N 877.66W 3150.00 66.28 308.38 1273.0 0.47 2663.67 913.15 N 895.57W 3175.00 66.90 308.36 1295.9 0.62 2673.60 927.40 N 913.56W 3200.00 67.35 308.38 1319.0 0.45 2683.32 941.69 N 931.62W 5 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-2] Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 3225.00 67.58 308.38 1342.1 0.23 2692.90 956.03 N 949.72W 603] 977.51 658877.59 3250.00 67.72 308.43 1365.2 0.15 2702.41 970.39 N 967.84W 6031991.87 658859.47 . 3275.00 67.52 308.61 1388.3 0.26 2711.93 984.79 N 985.92W 6032006.27 658841.39 3300.00 66.79 309.00 1411.3 0.81 2721.63 999.23 N 1003.88W 6032020.71 658823.43 3325.00 65.98 309.40 1434.2 0.89 2731.65 1013.71 N 1021.63 W 6032035.19 658805.68 3350.00 65.57 309.64 1457.0 0.46 2741.91 1028.21 N 1039.21 W 6032049.69 658788.10 3375.00 65.23 309.86 1479.7 0.39 2752.31 1042.75 N 1056.69 W 6032064.23 658770.62 3400.00 65.17 309.98 1502.4 0.12 2762.80 1057.31 N 1074. lOW 6032078.79 658753.21 3425.00 65.38 309.99 1525.1 0.21 2773.26 107] .90 N 1091.50W 6032093.38 658735.81 3450.00 65.89 310.14 1547.9 0.53 2783.57 ] 086.56 N 1108.92W 6032108.04 658718.39 3475.00 66.78 310.45 1570.8 0.93 2793.60 ] 101.37 N 1126.39W 6032122.85 658700.92 3500.00 67.42 310.64 1593.8 0.66 2803.33 1116.34 N 1143.89W 6032137.82 658683.42 3525.00 67.74 310.85 1617.0 0.37 2812.87 1131.42 N 1161.40W 6032152.90 658665.9] 3550.00 68.03 311.08 1640.1 0.36 2822.28 1146.61 N 1178.89W 6032168.09 658648.42 3575.00 68.48 311.37 1663.3 0.52 2831.54 1161.91 N 1196.35W 6032183.39 658630.96 3600.00 69.11 311.80 1686.6 0.75 2840.58 1177.38 N 1213.78W 6032198.86 658613.53 . 3625.00 69.70 312.07 1710.0 0.64 2849.38 1193.02 N ]231.19W 6032214.50 658596.12 3650.00 70.16 312.26 1733.5 0.49 2857.96 1208.78 N 1248.60W 6032230.26 658578.71 3675.00 70.43 312.35 1757.0 0.28 2866.39 1224.63 N 1266.00W 6032246.11 658561.31 3700.00 70.35 312.56 1780.5 0.21 2874.78 1240.52 N 1283.38W 6032262.00 658543.93 3725.00 69.73 313.02 1804.0 0.76 2883.31 1256.48 N 1300.62 W 6032277.96 658526.69 3750.00 68.69 313.49 1827.3 1.13 2892.18 1272.50 N 1317.65W 6032293.98 658509.66 3775.00 67.73 313.82 1850.5 1.01 2901.46 1288.52 N 1334.44 W 6032310.00 658492.87 3800.00 67.53 313.89 1873.6 0.21 2910.98 1304.54 N 1351.11W 6032326.02 658476.20 6 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 f1. 3825.00 67.71 313.89 1896.6 0.18 2920.50 1320.57 N 1367.77W . 3850.00 67.94 313.90 1919.7 0.23 2929.93 1336.62 N 1384.45W 3875.00 68.22 313.87 1942.8 0.28 2939.27 1352.70 N 1401.17W 3900.00 68.72 313.74 1966.1 0.51 2948.44 1368.79 N 1417.95W 3925.00 69.21 313.60 1989.3 0.51 2957.41 1384.91 N 1434.83 W 3950.00 69.50 313.55 2012.7 0.29 2966.23 1401.03 N 1451.78W 3975.00 69.76 313.49 2036.1 0.27 2974.93 1417.17 N 1468.78W 4000.00 70.01 313.41 2059.5 0.26 2983.53 1433.31 N 1485.82W 4025.00 70.24 313.35 2083.0 0.24 2992.03 1449.46 N 1502.91 W 4050.00 70.46 313.35 2106.5 0.22 3000.43 1465.62 N ] 520.03 W 4075.00 70.69 313.37 2130.0 0.23 3008.75 ] 481.81 N 1537.17W 4100.00 70.92 313.38 2153.6 0.23 3016.97 ]498.03 N 1554.33 W 4125.00 71.15 313.37 2177.2 0.23 3025.09 ]5]4.26 N 1571.5] W 4150.00 71.31 3]3.26 2200.8 0.19 3033.]4 ]530.50 N 1588.74 W 4175.00 71.33 312.95 2224.5 0.29 3041.14 ]546.69 N 1606.03 W 4200.00 71.23 312.52 2248.1 0.42 3049.17 ]562.75 N 1623.42W . 4225.00 71.12 312.17 2271.8 0.35 3057.23 ]578.69 N 1640.91 W 4250.00 71.01 312.08 2295.4 0.14 3065.35 1594.55 N 1658.45W 4275.00 70.74 312.08 2319.0 0.27 3073.54 1610.38 N 1675.98W 4300.00 70.50 312.15 2342.6 0.25 3081.83 1626.20 N 1693.47W 4325.00 70.14 312.22 2366.1 0.37 3090.25 1642.01 N 171O.92W 4350.00 69.81 312.29 2389.6 0.34 3098.81 1657.80 N 1728.30W 4375.00 69.63 312.34 2413.0 0.19 3107.48 1673.59 N 1745.64 W 4400.00 69.56 312.38 2436.4 0.08 3116.19 1689.38 N 1762.95W A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 4425.00 69.53 312.43 2459.8 0.06 3124.93 1705.17 N 1780.25 W 4450.00 69.33 312.53 2483.2 0.22 3133.72 1720.98 N 1797.51 W . 4475.00 69.14 312.66 2506.6 0.23 3142.58 1736.80 N 1814.72W 4500.00 69.04 312.74 2529.9 0.12 3151.50 1752.64 N 1831.88W 4525.00 69.08 312.79 2553.2 0.06 3160.44 1768.49 N 1849.03W 4550.00 69.16 312.81 2576.5 0.08 3169.35 1784.36 N 1866.16W 4575.00 68.86 312.83 2599.8 0.30 3178.30 1800.23 N 1883.28W 4600.00 68.26 312.84 2623.1 0.60 3187.44 1816.05 N 1900.35W 4625.00 68.06 312.83 2646.3 0.20 3196.74 1831.82 N 1917.37W 4650.00 68.29 312.84 2669.4 0.23 3206.03 1847.60 N 1934.38W 4675.00 68.55 312.84 2692.7 0.26 3215.23 1863.41 N 1951.43W 4700.00 68.76 312.85 2715.9 0.21 3224.33 1879.24 N 1968.50W 4725.00 68.85 312.89 2739.2 0.10 3233.37 1895.10 N 1985.59W 4750.00 68.92 312.95 2762.5 0.09 3242.37 1910.98 N 2002.67 W 4775.00 69.10 312.97 2785.8 0.18 3251.33 1926.89 N 2019.75W 4800.00 69.31 312.97 2809.1 0.21 3260.20 1942.82 N 2036.85W . 4825.00 69.28 312.94 2832.5 0.04 3269.04 1958.76 N 2053.96W 4850.00 68.67 312.85 2855.8 0.62 3278.01 1974.64 N 2071.06W 4875.00 67.98 312.81 2879.0 0.69 3287.25 1990.43 N 2088.10W 4900.00 67.87 312.80 2902.1 0.11 3296.64 2006.18 N 2105.09W 4925.00 67.94 312.77 2925.3 0.08 3306.04 2021.91 N 2122.09W 4950.00 68.01 312.73 2948.4 0.08 3315.42 2037.64 N 2139.11 W 4975.00 68.03 312.67 2971.6 0.06 3324.78 2053.36 N 2156.15W 5000.00 67.98 312.55 2994.7 0.12 3334.14 2069.06 N 2173.21 W 5025.00 68.09 312.45 3017.9 0.14 3343.49 2084.72 N 2190.30W 8 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED DEPTH feet IN C L AZIMUTH deg. deg. 25 ft. VERTICAL SECTION feet DOGLEG SEVERITY deg.l VERTICAL DEPTH feet HORIZONTAL COORDINATES feet 5050.00 68.29 312.38 3041.1 0.21 3352.78 2100.38 N 2207.44 W . 5075.00 68.52 312.28 3064.3 0.25 3361.98 2116.03 N 2224.63 W 5100.00 68.73 312.16 3087.6 0.24 3371.09 2131.67 N 2241.87W 5125.00 68.92 312.01 3110.9 0.24 3380.12 2147.30 N 2259.17W 5150.00 69.14 311. 94 3134.2 0.23 3389.07 2162.91 N 2276.52W 5175.00 69.25 311.83 3157.6 0.15 3397.95 2178.51 N 2293.92W 5200.00 69.28 311.76 3180.9 0.07 3406.80 2194.10 N 2311.35W 5225.00 69.31 311.71 3204.3 0.06 3415.64 2209.66 N 2328.80W 5250.00 69.26 311.63 3227.7 0.09 3424.48 2225.21 N 2346.27 W 5275.00 69.26 311.57 3251.1 0.06 3433.34 2240.73 N 2363.75W 5300.00 69.22 311.50 3274.4 0.08 3442.20 2256.23 N 2381.25W 5325.00 69.15 311.44 3297.8 0.09 3451.08 2271.71 N 2398.76W 5350.00 68.96 311.35 3321.1 0.21 3460.02 2287.15 N 2416.28W 5375.00 68.89 311.30 3344.4 0.08 3469.01 2302.55 N 2433.80W 5400.00 68.86 311.24 3367.8 0.06 3478.02 2317.93 N 2451.32W 5425.00 68.78 311.11 3391.1 0.15 3487.05 2333.28 N 2468.87W . 5450.00 68.82 311.02 3414.4 0.09 3496.09 2348.59 N 2486.44 W 5475.00 68.85 310.96 3437.7 0.06 3505.12 2363.88 N 2504.04 W 5500.00 68.95 310.91 3461.0 0.11 3514.12 2379.16 N 2521.66W 5525.00 69.08 310.86 3484.3 0.14 3523.07 2394.44 N 2539.31 W 5550.00 69.18 310.80 3507.7 0.11 3531.98 2409.72 N 2556.98 W 5575.00 69.38 310.78 3531.1 0.20 3540.82 2424.99 N 2574.69W 5600.00 69.42 310.67 3554.5 0.11 3549.62 2440.26 N 2592.42 W 5625.00 69.39 310.51 3577 .9 0.15 3558.41 2455.49 N 261O.19W 9 A Gyrodata Directional Survey BP Exploration Lease: Northstar WeB: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 ft. 5650.00 69.41 310.33 3601.3 0.17 3567.21 2470.66 N 2628.01 W 5675.00 69.36 310.10 3624.7 0.22 3576.01 2485.77 N 2645.88 W . 5700.00 69.25 309.87 3648.1 0.24 3584.84 2500.80 N 2663.80W 5725.00 69.10 309.62 3671.4 0.28 3593.73 2515.74 N 2681.76W 5750.00 69.12 309.43 3694.8 0.18 3602.65 2530.60 N 2699.78 W 5775.00 69.16 309.28 3718.2 0.15 3611.55 2545.41 N 2717.84 W 5800.00 69.18 309.15 3741.5 0.12 3620.44 2560.19 N 2735.95W 5825.00 69.13 308.95 3764.9 0.19 3629.33 2574.91 N 2754.09W 5850.00 69.20 308.78 3788.2 0.17 3638.23 2589.57 N 2772.28 W 5875.00 69.19 308.57 3811.6 0.20 3647.11 2604.17 N 2790.53 W 5900.00 69.17 308.35 3835.0 0.21 3655.99 2618.70 N 2808.83 W 5925.00 69.22 308.15 3858.3 0.19 3664.87 2633.17 N 2827.18W 5950.00 69.16 307.95 3881.7 0.20 3673.75 2647.58 N 2845.58 W 5975.00 69.14 307.80 3905.0 0.14 3682.65 2661.92 N 2864.02W 6000.00 68.98 307.57 3928.3 0.27 3691.59 2676.19 N 2882.50W 6025.00 68.73 307.26 3951.6 0.38 3700.60 2690.36 N 2901.02W . 6050.00 68.71 307.06 3974.9 0.19 3709.68 2704.43 N 2919.58W 6075.00 68.91 306.97 3998.2 0.22 3718.71 2718.46 N 2938.20W 6100.00 69.09 306.87 4021.5 0.20 3727.67 2732.48 N 2956.86 W 6125.00 69.04 306.73 4044.8 0.14 3736.61 2746.47 N 2975.55W 6150.00 68.86 306.54 4068.1 0.25 3745.59 2760.39 N 2994.28 W 6175.00 68.76 306.46 4091.4 0.12 3754.62 2774.26 N 3013.01 W 6200.00 68.69 306.43 4114.6 0.08 3763.69 2788.10 N 3031.75W 6225.00 68.80 306.43 4137.9 0.11 3772.76 2801.93 N 3050.50W 10 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-2] Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 6250.00 69.00 306.44 4161.1 0.20 3781.76 2815.79 N 3069.26W 6275.00 69.12 306.43 4184.4 0.12 3790.69 2829.65 N 3088.05W . 6300.00 69.25 306.40 4207.8 0.13 3799.58 2843.53 N 3106.85W 6325.00 69.41 306.39 4231.1 0.16 3808.40 2857.40 N 3]25.68W 6350.00 69.59 306.39 4254.5 0.18 3817.16 2871.30 N 3144.53W 6375.00 69.81 306.39 4277.9 0.22 3825.83 2885.21 N 3163.41 W 6400.00 69.95 306.38 4301.3 0.14 3834.43 2899.13 N 3182.31 W 6425.00 70.02 306.37 4324.8 0.07 3842.98 29]3.06 N 320I.22W 6450.00 69.96 306.34 4348.2 0.07 3851.54 2926.99 N 3220.14 W 6475.00 69.90 306.28 4371.6 0.08 3860.12 2940.89 N 3239.06W 6500.00 69.88 306.26 4395.1 0.03 3868.71 2954.78 N 3257.99W 6525.00 69.81 306.25 4418.5 0.07 3877.33 2968.66 N 3276.91 W 6550.00 69.80 306.20 4441. 9 0.05 3885.96 2982.53 N 3295.84 W 6575.00 69.70 306.19 4465.3 0.10 3894.61 2996.38 N 3314.77W 6600.00 69.55 306.]6 4488.7 0.15 3903.32 3010.21 N 3333.69W 6625.00 69.53 306.13 4512.1 0.03 3912.05 3024.03 N 3352.60W . 6650.00 69.61 306.16 4535.4 0.08 3920.78 3037.85 N 3371.52 W 6675.00 69.69 306.19 4558.8 0.08 3929.47 3051.68 N 3390.44 W 6700.00 69.72 306.24 4582.2 0.06 3938.15 3065.53 N 3409.36W 6725.00 69.70 306.34 4605.6 0.10 3946.82 3079.41 N 3428.26 W 6750.00 69.72 306.46 4629.0 0.11 3955.48 3093.33 N 3447.13W 6775.00 69.61 306.66 4652.4 0.22 3964.17 3107.29 N 3465.96W 6800.00 69.48 306.82 4675.8 0.20 3972.91 3121.30 N 3484.73W 6825.00 69.45 306.96 4699.2 0.13 3981.68 3135.36 N 3503.46W 11 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 ft. 6850.00 69.44 307.13 4722.6 0.16 3990.46 3149.46 N 3522.14W 6875.00 69.30 307.31 4745.9 0.22 3999.26 3163.61 N 3540.77W . 6900.00 69.15 307.45 4769.3 0.20 4008.13 3177.80 N 3559.35W 6925.00 69.18 307 .57 4792.6 0.12 4017.02 3192.03 N 3577.88W 6950.00 69.16 307.71 4816.0 0.13 4025.91 3206.30 N 3596.38 W 6975.00 69.07 307.83 4839.3 0.14 4034.83 3220.60 N 3614.85W 7000.00 68.95 307.98 4862.6 0.18 4043.78 3234.94 N 3633.26W 7025.00 68.89 308.17 4885.9 0.19 4052.77 3249.33 N 3651.63 W 7050.00 68.85 308.25 4909.2 0.08 4061.79 3263.75 N 3669.95W 7075.00 68.80 308.28 4932.6 0.06 4070.82 3278.19 N 3688.25W 7100.00 68.76 308.35 4955.8 0.08 4079.86 3292.64 N 3706.54 W 7125.00 68.66 308.48 4979.1 0.16 4088.94 3307.11 N 3724.79W 7150.00 68.58 308.63 5002.4 0.16 4098.06 3321.62 N 3742.99W 7175.00 68.56 308.75 5025.7 0.11 4107.19 3336.17 N 3761.16W 7200.00 68.53 308.91 5048.9 0.15 4116.33 3350.76 N 3779.28W 7225.00 68.52 309.04 5072.2 0.12 4125.49 3365.39 N 3797.37 W . 7250.00 68.47 309.19 5095.4 0.15 4134.65 3380.07 N 3815.42W 7275.00 68.36 309.39 5118.7 0.22 4143.85 3394.79 N 3833.41 W 7300.00 68.26 309.54 5141.9 0.17 4153.09 3409.55 N 3851.34 W 7325.00 68.15 309.65 5165.1 0.15 4162.37 3424.35 N 3869.23W 7350.00 68.10 309.78 5188.3 0.13 4171.68 3439.17 N 3887.08W 7375.00 68.04 309.94 5211.5 0.16 4181.02 3454.03 N 3904.88W 7400.00 67.97 310.10 5234.7 0.16 4190.38 3468.94 N 3922.63 W 7425.00 67.92 310.29 5257.9 0.18 4199.77 3483.89 N 3940.33 W 12 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 7450.00 67.84 310.52 5281.0 0.23 4209.19 3498.91 N 3957.97W 7475.00 67.72 310.67 5304.2 0.18 4218.64 3513.97 N 3975.54 W . 7500.00 67.60 310.77 5327.3 0.15 4228.14 3529.05 N 3993.06W 7525.00 67.58 310.91 5350.4 0.13 4237.67 3544.16 N 401O.55W 7550.00 67.57 311.10 5373.5 0.18 4247.21 3559.33 N 4027.99W 7575.00 67.54 311.28 5396.6 0.17 4256.75 3574.54 N 4045.38W 7600.00 67.50 3 I 1.43 5419.7 0.14 4266.3 I 3589.81 N 4062.72 W 7625.00 67.49 311.58 5442.8 0.14 4275.88 3605.11 N 4080.01 W 7650.00 67.62 311.65 5465.9 0.15 4285.43 3620.46 N 4097.29 W 7675.00 67.76 311. 70 5489.0 0.15 4294.92 3635.84 N 4114.56W 7700.00 68.01 311.70 5512.2 0.25 4304.33 3651.24 N 4131.86W 7725.00 68.29 311.72 5535.4 0.28 4313.63 3666.68 N 4149.18W 7750.00 68.58 311.72 5558.6 0.29 4322.82 3682.16 N 4166.53W 7775.00 68.96 311. 76 5581.9 0.38 4331.88 3697.67 N 4183.92W 7800.00 69.39 311.80 5605.2 0.43 4340.76 3713.24 N 4201.35W 7825.00 69.68 311.80 5628.6 0.29 4349.50 3728.85 N 4218.81 W . 7850.00 69.89 311.81 5652.1 0.21 4358.14 3744.49 N 4236.29 W 7875.00 69.91 311. 83 5675.6 0.03 4366.73 3760.14 N 4253.79W 7900.00 69.80 311.85 5699.0 0.11 4375.34 3775.80 N 4271.28W 7925.00 69.78 311.85 5722.5 0.02 4383.98 3791.45 N 4288.75W 7950.00 69.79 311.86 5745.9 0.01 4392.62 3807.10 N 4306.23 W 7975.00 69.69 311.86 5769.4 0.10 4401.28 3822.76 N 4323.69W 8000.00 69.66 311.86 5792.8 0.03 4409.96 3838.40 N 4341.15W 8025.00 69.62 3 I 1. 84 5816.2 0.04 4418.66 3854.04 N 4358.61 W 13 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 ft. 8050.00 69.50 311.80 5839.6 0.13 4427.39 3869.66 N 4376.07 W 8075.00 69.36 311.81 5863.0 0.14 4436.17 3885.26 N 4393.52 W . 8100.00 69.34 311. 80 5886.4 0.02 4444.99 3900.85 N 441O.96W 8125.00 69.24 311. 65 5909.8 0.17 4453.83 3916.42 N 4428.41 W 8150.00 68.98 311.46 5933.1 0.31 4462.74 3931.91 N 4445.89W 8175.00 69.15 311.45 5956.5 0.17 4471.68 3947.37 N 4463.39 W 8200.00 69.25 311.43 5979.8 0.10 4480.56 3962.84 N 4480.91 W 8225.00 69.12 311.40 6003.2 0.13 4489.44 3978.30 N 4498.43 W 8250.00 69.16 311.38 6026.6 0.04 4498.34 3993.74 N 4515.96W 8275.00 69.45 311.38 6049.9 0.29 4507.18 4009.20 N 4533.51 W 8300.00 69.69 311.40 6073.4 0.24 4515.90 4024.69 N 4551.08W 8325.00 69.85 311.40 6096.8 0.16 4524.55 4040.20 N 4568.68 W 8350.00 69.79 311.37 6120.3 0.07 4533.17 4055.72 N 4586.28W 8375.00 69.67 311.37 6143.7 0.12 4541.83 4071.22 N 4603.88 W 8400.00 69.76 311.36 6167.] 0.09 4550.50 4086.7] N 462] .48 W 8425.00 69.80 311.34 6]90.6 0.04 4559.14 4102.21 N 4639.09W . 8450.00 69.92 311.33 6214.1 0.12 4567.75 4117.71 N 4656.72 W 8475.00 70.01 311.34 6237.6 0.09 4576.31 4133.23 N 4674.35W 8500.00 70.09 311.33 6261.0 0.08 4584.84 4148.75 N 4692.00W 8525.00 70.11 311.33 6284.5 0.02 4593.35 4164.27 N 4709.65W 8550.00 70.02 311.32 6308.0 0.09 4601.88 4179.79 N 4727.30W 8575.00 69.95 311.28 6331.5 0.08 4610.43 4195.29 N 4744.95W 8600.00 69.94 311.26 6355.0 0.02 4619.01 4210.78 N 4762.60W 8625.00 70.15 311.25 6378.5 0.21 4627.54 4226.28 N 4780.26W 8650.00 70.25 311.22 6402.0 0.10 4636.01 4241.78 N 4797.95W ]4 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 deg. deg. 25 ft. VERTICAL SECTION feet DOGLEG SEVERITY deg./ VERTICAL DEPTH feet HORIZONTAL COORDINATES feet MEASURED DEPTH feet IN C L AZIMUTH 8675.00 70.21 311.14 64 25.5 0.09 4644.46 4257.27 N 4815.66W . 8700.00 70.13 310.97 6449.1 0.18 4652.94 4272.72 N 4833.39W 8725.00 70.03 310.77 6472.6 0.21 4661.46 4288.10 N 4851.17W 8750.00 70.19 310.64 6496.1 0.20 4669.97 4303.43 N 4868.99 W 8775.00 70.46 310.57 6519.6 0.28 4678.38 4318.75 N 4886.86W 8800.00 70.73 310.52 6543.2 0.27 4686.69 4334.08 N 4904.78W 8825.00 70.68 310.43 6566.8 0.10 4694.95 4349.40 N 4922.73W 8850.00 70.53 310.31 6590.4 0.19 4703.25 4364.67 N 4940.69W 8875.00 70.68 310.30 6613.9 0.15 4711.55 4379.92 N 4958.68W 8900.00 70.74 310.27 6637.5 0.07 4719.81 4395.18 N 4976.68 W 8925.00 70.72 310.21 6661.1 0.06 4728.06 4410.43 N 4994.69W 8950.00 70.68 310.16 6684.7 0.06 4736.33 4425.65 N 5012.72W 8975.00 70.66 310.15 6708.3 0.02 4744.60 4440.86 N 5030.75W 9000.00 70.71 310.15 6731.9 0.05 4752.87 4456.08 N 5048.78W 9025.00 70.73 310.11 6755.5 0.04 4761.13 4471.29 N 5066.82 W 9050.00 70.79 310.04 6779.1 0.09 4769.36 4486.48 N 5084.89W . 9075.00 70.83 309.99 6802.7 0.06 4777.58 4501.66 N 5102.97W 9100.00 70.85 309.96 6826.3 0.03 4785.79 4516.84 N 5121.07W 9125.00 70.96 309.95 6849.9 0.11 4793.96 4532.01 N 5139.17W 9150.00 70.95 309.91 6873.6 0.04 4802.12 4547.17 N 5157.30W 9175.00 70.98 309.89 6897.2 0.04 4810.28 4562.33 N 5175.43W 9200.00 71. 06 309.85 6920.9 0.09 4818.41 4577.49 N 5193.57W 9225.00 71.14 309.81 6944.5 0.09 4826.51 4592.64 N 5211.73W 9250.00 71.13 309.73 6968.2 0.08 4834.59 4607.77 N 5229.92W 15 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 ft. 9275.00 70.93 309.67 6991.8 0.21 4842.72 4622.87 N 5248.11 W . 9300.00 70.79 309.69 7015.4 0.14 4850.91 4637.95 N 5266.28 W 9325.00 70.62 309.74 7039.0 0.18 4859.17 4653.03 N 5284.44 W 9350.00 70.58 309.79 7062.6 0.06 4867.48 4668.11 N 5302.56 W 9375.00 70.63 309.82 7086.2 0.06 4875.78 4683.21 N 5320.68 W 9400.00 70.51 309.84 7109.8 0.12 4884.10 4698.31 N 5338.78 W 9425.00 70.30 309.87 7133.3 0.21 4892.48 4713.40 N 5356.86 W 9450.00 70.15 309.91 7156.8 0.15 4900.94 4728.49 N 5374.91 W 9475.00 70.14 309.98 7180.4 0.07 4909.43 4743.59 N 5392.94 W 9500.00 70.15 310.02 7203.9 0.04 4917.92 4758.70 N 541O.95W 9525.00 70.08 310.03 7227.4 0.07 4926.42 4773.82 N 5428.96 W 9550.00 69.97 310.01 7250.9 0.11 4934.96 4788.93 N 5446.95 W 9575.00 69.91 309.95 7274.4 0.08 4943.54 4804.02 N 5464.94 W 9600.00 69.84 309.93 7297.8 0.07 4952.14 4819.09 N 5482.94 W 9625.00 69.68 309.95 7321.3 0.16 4960.79 4834.15 N 5500.93 W . 9650.00 69.56 309.93 7344.7 0.12 4969.50 4849.]9 N 55]8.89W 9675.00 69.46 309.91 7368.1 0.10 4978.25 4864.22 N 5536.85W 9700.00 69.44 309.91 7391.6 0.02 4987.02 4879.24 N 5554.81 W 9725.00 69.47 309.93 7415.0 0.04 4995.80 4894.26 N 5572.76W 9750.00 69.42 309.93 7438.4 0.05 5004.57 4909.29 N 5590.7] W 9775.00 69.39 309.93 7461.8 0.03 5013.37 4924.31 N 5608.66 W 9800.00 69.28 309.94 7485.2 0.11 5022.19 4939.32 N 5626.60W 9825.00 69.16 309.91 7508.5 0.12 5031.06 4954.32 N 5644.52 W 9850.00 69.10 309.87 7531.9 0.07 5039.97 4969.31 N 5662.44 W 16 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-2l Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 9875.00 68.94 309.82 7555.2 0.17 5048.92 4984.26 N 5680.37 W . 9900.00 68.87 309.79 7578.6 0.08 5057.91 4999.19 N 5698.29W 9925.00 68.80 309.82 7601.9 0.08 5066.94 5014.12 N 5716.20W 9950.00 68.62 309.81 7625.2 0.18 5076.02 5029.03 N 5734.09W 9975.00 68.61 309.78 7648.4 0.03 5085.13 5043.93 N 5751.97W 10000.00 68.54 309.82 7671.7 0.08 5094.27 5058.83 N 5769.85W 10025.00 68.37 309.88 7695.0 0.18 5103.45 5073.73 N 5787.71 W 10050.00 68.16 309.92 7718.2 0.21 5112.70 5088.63 N 5805.52 W 10075.00 68.06 309.95 7741.4 0.10 5122.03 5103.52 N 5823.31 W 10100.00 68.35 309.93 7764.6 0.29 5131.31 5118.42N 5841.11 W 10125.00 68.49 309.91 7787.9 0.14 5140.50 5133.34 N 5858.94 W 10150.00 68.43 309.86 7811.1 0.08 5149.68 5148.25 N 5876.78W 10175.00 68.39 309.81 7834.4 0.06 5158.88 5163.14 N 5894.63W 10200.00 68.40 309.75 7857.6 0.06 5168.09 5178.01 N 59]2.49W 10225.00 68.36 309.68 7880.8 0.08 5177.30 5192.86 N 5930.37 W 10250.00 68.26 309.65 7904.1 0.10 5186.54 5207.69 N 5948.25W . 10275.00 68.23 309.64 7927.3 0.03 5195.80 5222.51 N 5966. ]3W 10300.00 68.27 309.62 7950.5 0.04 5205.07 5237.32 N 5984.02 W 10325.00 68.31 309.62 7973.7 0.04 52]4.31 5252.13 N 6001.91 W 10350.00 68.45 309.69 7997.0 0.15 5223.53 5266.96 N 6019.80W 10375.00 68.58 309.81 8020.2 0.17 5232.68 5281.83 N 6037.69W 10400.00 68.79 310.01 8043.5 0.28 5241.77 5296.78 N 6055.55W 10425.00 69.02 310.09 8066.9 0.24 5250.77 5311.79 N 6073.41 W 10450.00 69.24 310.10 8090.2 0.22 5259.67 5326.83 N 6091.27W 17 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 10475.00 69.40 310.13 8113.6 0.16 5268.50 5341.90 N 6109.l6W 10500.00 69.46 310.19 8137.0 0.08 5277.29 5357.00 N 6127.05W . 10525.00 69.49 310.22 8160.4 0.04 5286.05 5372.11 N 6144.93W 10550.00 69.74 310.22 8183.9 0.25 5294.76 5387.24 N 6162.82W 10575.00 69.97 310.21 8207.3 0.23 5303.37 5402.40 N 6180.75W 10600.00 69.99 310.29 8230.8 0.08 5311.93 5417.57 N 6198.68W 10625.00 70.11 310.37 8254.3 0.14 5320.46 5432.78 N 6216.59W 10650.00 70.05 310.48 8277.8 0.12 5328.98 5448.02 N 6234.48 W 10675.00 70.18 310.45 8301.3 0.13 5337.48 5463.28 N 6252.37 W 10700.00 70.27 310.48 8324.9 0.09 5345.94 5478.55 N 6270.27W 10725.00 70.09 310.48 8348.4 0.18 5354.41 5493.82 N 6288.16W 10750.00 69.95 310.47 8371.9 0.14 5362.96 5509.07 N 6306.03 W 10775.00 69.52 310.47 8395.3 0.43 5371.61 5524.29 N 6323.87W 10800.00 69.38 310.45 8418.7 0.14 5380.39 5539.48 N 6341.68W 10825.00 69.43 310.45 8442.1 0.05 5389.18 5554.66 N 6359.49 W 10850.00 69.01 310.41 8465.5 0.42 5398.05 5569.82 N 6377.28W . 10875.00 68.91 310.41 8488.8 0.10 5407.03 5584.95 N 6395.05W 10900.00 68.76 310.41 8512.1 0.15 5416.06 5600.06 N 6412.80W 10925.00 68.71 310.38 8535.4 0.06 5425.12 5615.16 N 6430.54 W 10950.00 68.70 310.42 8558.7 0.04 5434.20 5630.25 N 6448.28 W 10975.00 68.07 310.37 8582.0 0.63 5443.41 5645.32 N 6465.98 W 11000.00 68.14 310.35 8605.2 0.07 5452.73 5660.34 N 6483.66W 11025.00 68.43 310.34 8628.4 0.29 5461.98 5675.37 N 6501.36W 11050.00 68.26 310 .40 8651.6 0.18 5471.21 5690.42 N 6519.06W 18 A Gyrodata Directional Survey BP Exploration Lease: Northstar Wen: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 11075.00 68.09 310.53 8674.8 0.21 5480.50 5705.49 N 6536.72W . 11100.00 67.88 310.67 8698.0 0.25 5489.87 5720.57 N 6554.32 W 11125.00 68.01 310.68 8721.2 0.13 5499.26 5735.67 N 6571.89W 11150.00 67.80 310.73 8744.3 0.22 5508.67 5750.78 N 6589.45W 11175.00 67.87 310.83 8767.5 0.12 5518.10 5765.90 N 6606.98 W 11200.00 68.05 310.88 8790.7 0.19 5527.48 5781.06 N 6624.51 W 11225.00 67.94 310.96 8813.8 0.13 5536.85 5796.24 N 6642.02 W 11250.00 68.12 311.01 8837.0 0.19 5546.20 5811.45 N 6659.53W 11275.00 67.89 311.02 8860.2 0.23 5555.56 5826.66 N 6677.02W 11300.00 68.10 311.03 8883.4 0.21 5564.93 5841.87 N 6694.50W 11325.00 68.37 311.06 8906.6 0.27 5574.20 5857.12 N 6712.01 W 11350.00 68.38 311.26 8929.8 0.19 5583.41 5872.42 N 6729.51 W 11375.00 68.62 311.33 8953.1 0.25 5592.58 5887.77 N 6746.99W 11400.00 68.65 311.38 8976.4 0.06 5601.68 5903.15 N 6764.46W 11425.00 68.88 311.40 8999.6 0.23 5610.74 5918.56 N 6781.95W . 11450.00 69.10 311.43 9023.0 0.22 5619.70 5933.99 N 6799.45W 11475.00 69.05 311.61 9046.3 0.18 5628.63 5949.47 N 6816.93 W 11500.00 69.24 311.66 9069.7 0.20 5637.53 5964.99 N 6834.39W 11525.00 69.05 311.65 9093.0 0.19 5646.43 5980.52 N 6851.85W 11550.00 69.21 311.61 9116.4 0.16 5655.34 5996.04 N 6869.31 W 11575.00 69.37 311.52 9139.8 0.18 5664.18 6011.56 N 6886.80W 11600.00 69.42 311.46 9163.1 0.08 5672.98 6027.06 N 6904.33 W 11625.00 69.57 311.40 9186.5 0.16 5681.73 6042.55 N 6921.89 W 11650.00 69.34 311.26 9210.0 0.26 5690.51 6058.01 N 6939.47W 19 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 11675.00 69.38 311.23 9233.4 0.05 5699.32 6073.44 N 6957.06W 11700.00 69.34 311.18 9256.7 0.06 5708.13 6088.85 N 6974.66W . 11725.00 69.46 311.14 9280.1 0.13 5716.93 6104.25 N 6992.28 W 11750.00 69.65 311.12 9303.5 0.19 5725.66 6119.66 N 7009.92W 11775.00 69.59 311.10 9327.0 0.06 5734.37 6135.07 N 7027.58W 11800.00 69.73 311.02 9350.4 0.16 5743.06 6150.46 N 7045.26W 11825.00 69.70 310.87 9373.9 0.14 5751.72 6165.83 N 7062.97W 11850.00 69.81 310.77 9397.3 0.14 5760.37 6181.16 N 7080.72W 11875.00 69.95 310.75 9420.8 0.14 5768.97 6196.49 N 7098.50W 11900.00 69.86 310.58 9444.3 0.18 5777.56 6211.79 N 7116.31 W 11925.00 70.09 310.52 9467.8 0.24 5786.12 6227.06 N 7134.15W 11950.00 70.05 310.39 9491.3 0.13 5794.65 6242.31 N 7152.04 W 11975.00 70.10 310.33 9514.8 0.08 5803.16 6257.53 N 7169.95W 12000.00 70.04 310.22 9538.3 0.12 5811.69 6272.72 N 7187.88W 12025.00 70.05 310.13 9561.8 0.09 5820.22 6287.88 N 7205.83W 12050.00 70.28 310.09 9585.3 0.23 5828.70 6303.03 N 7223.82 W . 12075.00 70.51 310.03 9608.8 0.24 5837.09 6318.19 N 7241.85W 12100.00 70.70 309.97 9632.4 0.20 5845.39 6333.35 N 7259.91 W 12125.00 70.66 309.92 9656.0 0.06 5853.66 6348.50 N 7278.00W 12150.00 70.34 309.74 9679.6 0.36 5862.01 6363.59 N 7296.09W 12175.00 70.39 309.69 9703.1 0.07 5870.41 6378.64 N 7314.21 W 12200.00 70.35 309.60 9726.7 0.09 5878.81 6393.66 N 7332.34 W 12225.00 70.42 309.54 9750.2 0.09 5887.20 6408.66 N 7350.49 W 12250.00 70.33 309.48 9773.8 0.11 5895.60 6423.64 N 7368.66W 12275.00 70.27 309.42 9797.3 0.08 5904.02 6438.60 N 7386.83 W 20 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED DEPTH feet IN C L AZIMUTH deg. deg. 25 f1. VERTICAL SECTION feet DOGLEG SEVERITY deg.l VERTICAL DEPTH feet HORIZONTAL COORDINATES feet 12300.00 70.26 309.39 9820.8 0.03 5912.47 6453.54 N 7405.02 W . 12325.00 70.33 309.32 9844.4 0.10 5920.89 6468.46 N 7423.21 W 12350.00 70.24 309.25 9867.9 0.11 5929.33 6483.36 N 7441.43W 12375.00 70.13 309.22 9891.4 0.11 5937.80 6498.24 N 7459.65W 12400.00 70.12 309.13 9914.9 0.09 5946.30 6513.09 N 7477.87W 12425.00 70.08 309.08 9938.4 0.06 5954.81 6527.92 N 7496.12W 12450.00 70.02 309.06 9961.9 0.06 5963.34 6542.73 N 7514.36W 12475.00 70.13 309.00 9985.4 0.12 5971.86 6557.53 N 7532.62 W 12500.00 70.05 308.88 10008.9 0.14 5980.38 6572.30 N 7550.90W 12525.00 69.99 308.85 10032.4 0.07 5988.92 6587.05 N 7569.19W 12550.00 70.00 308.78 10055.9 0.07 5997.47 6601.77 N 7587.50W 12575.00 69.93 308.74 10079.4 0.08 6006.03 6616.47 N 7605.81 W 12600.00 70.03 308.70 10102.9 0.11 6014.59 6631.17 N 7624.14 W 12625.00 69.97 308.57 10126.4 0.14 6023.14 6645.84 N 7642.49W 12650.00 70.09 308.50 10149.8 0.14 6031.68 6660.47 N 7660.87W 12675.00 69.80 308.47 10173.3 0.29 6040.26 6675.09 N 7679.25W . 12700.00 69.68 308.40 10196.8 0.14 6048.91 6689.67 N 7697.62W 12725.00 69.66 308.33 10220.2 0.07 6057.60 6704.22 N 7716.01 W 12750.00 69.51 308.31 10243.6 0.15 6066.32 6718.74 N 7734.39 W 12775.00 69.52 308.29 10267.0 0.02 6075.07 6733.26 N 7752.77W 12800.00 69.39 308.28 10290.4 0.13 6083.84 6747.76 N 7771.14W 12825.00 69.32 308.23 10313.8 0.08 6092.66 6762.25 N 7789.51 W 12850.00 69.31 308.18 10337.2 0.05 6101.49 6776.71 N 7807.89W 12875.00 69.13 308.07 10360.5 0.21 6110.36 6791.14 N 7826.28 W 21 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 12900.00 69.16 308.01 10383.9 0.06 6119.26 6805.54 N 7844.68 W 12925.00 68.84 307.88 10407.2 0.34 6128.22 6819.89 N 7863.08 W . 12950.00 69.11 307.87 10430.5 0.27 6137.18 6834.22 N 7881.50W 12975.00 69.23 307.89 10453.9 0.12 6146.07 6848.57 N 7899.95 W 13000.00 68.94 307.82 10477.2 0.30 6155.00 6862.90 N 7918.38W 13025.00 69.01 307.78 10500.5 0.08 6163.97 6877.20 N 7936.82 W 13050.00 68.91 307.71 10523.9 0.12 6172.94 6891.48 N 7955.27W 13075.00 68.98 307.64 10547.2 0.10 6181.93 6905.74 N 7973.74 W 13100.00 68.88 307 .55 10570.5 0.13 6190.91 6919.97 N 7992.22 W 13125.00 68.59 307.50 10593.8 0.29 6199.98 6934.16 N 801O.70W 13150.00 68.75 307.45 10617.0 0.17 6209.07 6948.33 N 8029.18W 13175.00 68.81 307.45 10640.3 0.06 6218.12 6962.50 N 8047.68W 13200.00 68.96 307.54 10663.6 0.17 6227.13 6976.70 N 8066.19W 13225.00 68.78 307.76 10686.9 0.27 6236.14 6990.94 N 8084.65 W 13250.00 68.69 307.93 10710.2 0.18 6245.21 7005.24 N 8103.05W 13275.00 68.84 307.97 10733.5 0.15 6254.26 7019.57 N 8121.42W . 13300.00 68.68 308.12 10756.8 0.21 6263.32 7033.93 N 8139.77W 13325.00 68.86 308.25 10780.0 0.22 6272.37 7048.33 N 8158.09 W 13350.00 68.75 308.52 10803.3 0.27 6281.41 7062.81 N 8176.36W 13375.00 68.73 308.62 10826.6 0.10 6290.48 7077.33 N 8194.58W 13400.00 68.78 308.70 10849.9 0.09 6299.53 7091.89 N 8212.77W 13425.00 68.78 308.92 10873.2 0.21 6308.58 7106.50 N 8230.93 W 13450.00 68.87 309.08 10896.5 0.17 6317.61 7121.17 N 8249.05W 13475.00 68.94 309.24 10919.9 0.16 6326.61 7135.90 N 8267.14 W 22 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 f1. 13500.00 68.93 309.42 10943.2 0.17 6335.60 7150.68 N 8285.18W 13525.00 69.01 309.52 10966.5 0.12 6344.57 7165.52 N 8303.19W . 13550.00 69.02 309.62 10989.9 0.09 6353.52 7180.38 N 8321.19W 13575.00 69.05 309.69 11013.2 0.07 6362.47 7195.28 N 8339.16W 13600.00 69.05 309.76 11036.5 0.07 6371.41 7210.20 N 8357.12W 13625.00 69.03 309.83 11059.9 0.07 6380.35 7225.15 N 8375.05W 13650.00 69.00 309.86 11083.2 0.04 6389.30 7240.10 N 8392.98 W 13675.00 69.13 309.88 11106.6 0.13 6398.23 7255.07 N 841O.90W 13700.00 69.19 309.93 11130.0 0.08 6407.13 7270.06 N 8428.82 W 13725.00 69.15 310.00 11153.3 0.08 6416.02 7285.07 N 8446.73W 13750.00 69.20 309.97 11176.7 0.06 6424.91 7300.08 N 8464.63 W 13775.00 69.32 309.94 11200.1 0.12 6433.76 7315.10 N 8482.55 W 13800.00 69.31 309.97 11223.5 0.03 6442.59 7330.12 N 8500.48 W 13825.00 69.08 309.99 11246.8 0.23 6451.47 7345.13 N 8518.39W 13850.00 69.02 310.00 11270.2 0.06 6460.41 7360.14 N 8536.28W 13875.00 69.13 310.00 11293.5 0.11 6469.34 7375.15 N 8554.17W . 13900.00 69.39 310.00 11316.9 0.26 6478.19 7390.18 N 8572.08 W 13925.00 69.58 309.99 11340.3 0.19 6486.95 7405.22 N 8590.01 W 13950.00 69.47 310.02 11363.7 0.11 6495.70 7420.28 N 8607.95W 13975.00 69.39 310.07 11387.2 0.09 6504.48 7435.34 N 8625.87W 14000.00 69.39 310.08 11410.5 0.01 6513.28 7450.40 N 8643.78W 14025.00 69.39 310.10 11433.9 0.02 6522.08 7465.47 N 8661.68W 14050.00 69.21 310.11 11457.3 0.18 6530.92 7480.54 N 8679.57W 14075.00 69.24 310.09 11480.7 0.04 6539.79 7495.60 N 8697.45W 23 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINA TES feet deg. deg. feet deg./ feet feet 25 f1. 14100.00 69.48 310.06 11504.1 0.24 6548.60 7510.66 N 8715.35W . 14125.00 69.52 310.04 11527.5 0.04 6557.35 7525.72 N 8733.27 W 14150.00 69.61 310.01 11550.9 0.09 6566.08 7540.79 N 8751.21 W 14175.00 69.66 309.97 11574.4 0.06 6574.78 7555.85 N 8769.17W 14200.00 69.65 309.96 11597.8 0.01 6583.47 7570.91 N 8787.13W 14225.00 69.80 309.96 11621.3 0.15 6592.14 7585.97 N 8805.11 W 14250.00 69.68 309.98 11644.7 0.12 6600.79 7601.04 N 8823.08W 14275.00 69.64 310.02 11668.2 0.05 6609.48 7616.10 N 8841.04 W 14300.00 69.77 310.05 11691.6 0.13 6618.15 7631.19 N 8858.99 W 14325.00 69.79 310.08 11715.1 0.03 6626.80 7646.29 N 8876.95 W 14350.00 69.92 310.10 11738.5 0.13 6635.40 7661.40 N 8894.90W 14375.00 69.93 310.08 11762.0 0.02 6643.99 7676.52 N 8912.87W 14400.00 69.94 310.01 11785.5 0.07 6652.56 7691.63 N 8930.84 W 14425.00 70.01 309.97 11809.0 0.08 6661.12 7706.73 N 8948.84 W 14450.00 70.17 309.96 11832.5 0.16 6669.64 7721.83 N 8966.86W 14475.00 70.33 309.98 11856.0 0.16 6678.09 7736.94 N 8984.89W . 14500.00 70.27 309.97 11879.6 0.06 6686.51 7752.06 N 9002.92W 14525.00 70.23 309.93 11903.1 0.05 6694.96 7767.17 N 9020.96 W 14550.00 70.22 309.92 11926.6 0.01 6703.42 7782.27 N 9039.00W 14575.00 70.06 309.92 11950.1 0.16 6711.91 7797.36 N 9057.04 W 14600.00 69.88 309.93 11973.6 0.18 6720.47 7812.43 N 9075.05 W 14625.00 69.76 309.93 11997.1 0.12 6729.10 7827.49 N 9093.04 W 14650.00 69.75 309.92 12020.5 0.01 6737.75 7842.55 N . 9111.03W 14675.00 69.68 309.91 12044.0 0.07 6746.42 7857.59 N 9129.02W 24 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 14700.00 69.77 309.94 12067.5 0.09 6755.08 7872.64 N 9147.00W . 14725.00 69.78 310.02 12090.9 0.08 6763.72 7887.72 N 9164.98W 14750.00 69.66 310.06 12114.4 0.13 6772.39 7902.80 N 9l82.93W 14775.00 69.57 310.09 12137.8 0.09 6781.10 7917.89 N 9200.86W 14800.00 69.48 310.10 12161.2 0.09 6789.84 7932.97 N 9218.78W 14825.00 69.47 310.11 12184.6 0.01 6798.61 7948.05 N 9236.69 W 14850.00 69.33 310.11 12208.0 0.14 6807.40 7963.13 N 9254.58 W 14875.00 69.26 310.13 12231.4 0.07 6816.24 7978.20 N 9272.47 W 14900.00 69.11 310.18 12254.8 0.16 6825.13 7993.27 N 9290.33 W 14925.00 69.01 310.25 12278.1 0.12 6834.06 8008.35 N 9308.16W 14950.00 69.04 310.31 12301.5 0.06 6843.01 8023.44 N 9325.97W 14975.00 68.92 310.39 12324.8 0.14 6851.98 8038.55 N 9343.75W 15000.00 68.92 310.47 12348.1 0.07 6860.97 8053.67 N 9361.51 W 15025.00 68.80 310.54 12371.5 0.14 6869.98 8068.82 N 9379.24 W 15050.00 68.71 310.58 12394.8 0.10 6879.04 8083.97 N 9396.94 W . 15075.00 68.71 310.61 12418.0 0.03 6888.12 8099.13 N 9414.63W 15100.00 68.59 310.64 12441.3 0.12 6897.22 8114.29 N 9432.30W 15125.00 68.61 310.66 12464.6 0.03 6906.34 8129.45 N 9449.96W 15150.00 68.47 310.68 12487.9 0.14 6915.49 8144.62 N 9467.61 W 15175.00 68.44 310.68 12511.1 0.03 6924.67 8159.77 N 9485.24 W 15200.00 68.61 310.62 12534.4 0.18 6933.82 8174.93 N 9502.89 W 15225.00 68.57 310.48 12557.7 0.14 6942.95 8190.06 N 9520.58 W 15250.00 68.64 310.38 12580.9 0.12 6952.07 8205.15 N 9538.29W 15275.00 68.60 310.23 12604.2 0.15 6961.18 8220.21 N 9556.05 W 25 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 15300.00 68.64 310.13 12627.5 0.10 6970.30 8235.23 N 9573.83 W 15325.00 68.70 310.03 12650.8 0.11 6979.39 8250.23 N 9591.65W . 15350.00 68.78 309.92 12674.1 0.13 6988.46 8265.20 N 9609.51 W 15375.00 68.74 309.81 12697.4 0.11 6997.51 8280.13 N 9627.39W 15400.00 68.66 309.67 12720.7 0.15 7006.59 8295.02 N 9645.30W 15425.00 68.67 309.56 12744.0 0.10 7015.69 8309.87 N 9663.24 W 15450.00 68.66 309.45 12767.2 0.10 7024.79 8324.68 N 9681.21 W 15475.00 68.63 309.33 12790.5 0.12 7033.89 8339.46 N 9699.20W 15500.00 68.71 309.23 12813.8 0.12 7042.98 8354.20 N 9717.23W 15525.00 68.64 309.14 12837.1 0.11 7052.07 8368.92 N 9735.28 W 15550.00 68.52 309.00 12860.4 0.18 7061.20 8383.59 N 9753.35W 15575.00 68.54 308.88 12883.6 0.11 7070.35 8398.21 N 9771.44 W 15600.00 68.56 308.78 12906.9 0.10 7079.50 8412.80 N 9789.57W 15625.00 68.52 308.66 12930.2 0.12 7088.64 8427.35 N 9807.72W 15650.00 68.41 308.52 12953.4 0.17 7097.82 8441.86 N 9825.90W 15675.00 68.40 308.39 12976.6 0.12 7107.02 8456.31 N 9844. lOW . 15700.00 68.43 308.27 12999.9 0.12 7116.22 8470.73 N 9862.34 W 15725.00 68.49 308.18 13023.1 0.10 7125.40 8485.12 N 9880.61 W 15750.00 68.46 308.04 13046.4 0.13 7134.57 8499.47 N 9898.91 W 15775.00 68.42 307.94 13069.6 0.10 7143.76 8513.78 N 9917.23W 15800.00 68.25 307.85 13092.8 0.19 7152.99 8528.05 N 9935.57W 15825.00 68.30 307.81 13116.0 0.06 7162.24 8542.30 N 9953.91 W 15850.00 68.42 307.82 13139.2 0.12 7171.46 8556.55 N 9972.27 W 15875.00 68.71 307.86 13162.5 0.29 7180.59 8570.82 N 9990.64 W 15900.00 69.05 307.92 13185.8 0.34 7189.60 8585.14 N 10009.05W 26 A Gyrodata Directional Survey BP Exploration Lease: Northstar WelI: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 deg. deg. 25 ft. VERTICAL SECTION feet DOGLEG SEVERITY deg./ VERTICAL DEPTH feet HORIZONTAL COORDINATES feet MEASURED DEPTH feet IN C L AZIMUTH 15925.00 69.23 307.97 13209.2 0.19 7198.50 8599.51 N 10027.47W . 15950.00 69.37 308.04 13232.5 0.15 7207.34 8613.91 N 10045.90W 15975.00 69.64 308.08 13255.9 0.27 7216.09 8628.34 N 10064.34 W 16000.00 69.92 308.09 13279.4 0.28 7224.74 8642.81 N 10082.80W 16025.00 70.13 308.10 13302.9 0.21 7233.28 8657.31 N 10101.29W 16050.00 70.08 308.11 13326.4 0.05 7241.78 8671.82 N 101l9.79W 16075.00 70.09 308.10 13349.8 0.01 7250.30 8686.32 N 10138.29W 16100.00 70.08 308.11 13373.3 0.01 7258.81 8700.83 N 10156.78W 16125.00 70.08 308.09 13396.8 0.02 7267.33 8715.33 N 10175.28W 16150.00 70.15 308.04 13420.3 0.08 7275.84 8729.83 N 10193.79W 16175.00 70.12 307.97 13443.8 0.07 7284.33 8744.30 N 10212.31 W 16200.00 70.19 307.96 13467.3 0.07 7292.82 8758.77 N 10230.85W 16225.00 70.19 307.92 13490.8 0.04 7301.29 8773.23 N 10249.40 W 16250.00 70.25 307.87 13514.3 0.08 7309.75 8787.68 N 10267.97W 16275.00 70.35 307.84 13537.9 0.10 7318.18 8802.12 N 10286.55 W 16300.00 70.34 307.81 13561.4 0.03 7326.59 8816.56 N 10305.15W . 16325.00 70.45 307.78 13584.9 0.11 7334.97 8830.99 N 10323.76W 16350.00 70.46 307.75 13608.5 0.03 7343.34 8845.42 N 10342.38 W 16375.00 70.45 307.72 13632.0 0.03 7351.70 8859.84 N 10361.02W 16400.00 70.51 307.71 13655.5 0.06 7360.06 8874.26 N 10379.65W 16425.00 70.45 307.68 13679.1 0.07 7368.41 8888.66 N 10398.30W 16450.00 70.48 307.70 13702.6 0.04 7376.77 8903.07 N 10416.94W 16475.00 70.33 307.73 13726.2 0.15 7385.15 8917.48 N 10435.58W 16500.00 70.21 307.74 13749.7 0.12 7393.59 8931.88 N 10454.19W 27 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 16525.00 70.21 307.77 13773.2 0.03 7402.06 8946.28 N 10472.78W 16550.00 70.00 307.81 13796.7 0.21 7410.56 8960.69 N 10491.36 W . 16575.00 69.93 307.84 13820.1 0.08 7419.13 8975.09 N 10509.91 W 16600.00 69.93 307.87 13843.6 0.03 7427.71 8989.50 N 10528.45 W 16625.00 69.84 307.91 13867.1 0.10 7436.31 9003.92 N 10546.98 W 16650.00 69.71 307.97 13890.5 0.14 7444.95 9018.34 N 10565.48 W 16675.00 69.54 308.01 13913.9 0.17 7453.65 9032.77 N 10583.95W 16700.00 69.62 308.03 13937.3 0.08 7462.38 9047.20 N 10602.41 W 16725.00 69.59 308.02 13960.8 0.03 7471.09 9061.63 N 10620.87W 16750.00 69.36 308.02 13984.2 0.23 7479.85 9076.05 N 10639.31 W 16775.00 69.31 308.02 14007.5 0.05 7488.68 9090.46 N 10657.74 W 16800.00 69.25 308.01 14030.9 0.06 7497.52 9104.86 N 10676.16W 16825.00 69.21 308.03 14054.3 0.04 7506.39 9119.26 N 10694.58W 16850.00 69.14 308.04 14077.6 0.07 7515.27 9133.66 N 10712.98W 16875.00 68.98 308.04 14101.0 0.16 7524.21 9148.04 N 10731.37 W 16900.00 68.91 308.04 14124.3 0.07 7533.19 9162.42 N 10749.75W . 16925.00 68.74 308.07 14147.6 0.17 7542.22 9176.79 N 10768.10W 16950.00 68.72 308.08 14170.9 0.02 7551.29 9191.16 N 10786.44 W 16975.00 68.70 308.10 14194.1 0.03 7560.37 9205.53 N 10804.78W 17000.00 68.71 308.12 14217.4 0.02 7569.45 9219.90 N 10823. lOW 17025.00 68.81 308.11 14240.7 0.10 7578.50 9234.29 N 10841.44 W 17050.00 68.71 308.07 14264.0 0.11 7587.56 9248.66 N 10859.78W 17075.00 68.69 308.02 14287.3 0.05 7596.64 9263.02 N 10878.12W 17100.00 68.66 307.99 14310.5 0.04 7605.73 9277.35 N 10896.47W 28 A Gyrodata Directional Survey BP Exploration Lease: Northstar WelI: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 17125.00 68.62 307.98 14333.8 0.04 7614.84 9291.68 N 10914.82W 17150.00 68.63 307.96 14357.1 0.02 7623.95 9306.01 N 10933.17W . 17175.00 68.60 307.97 14380.4 0.03 7633.07 9320.33 N 10951.53 W 17200.00 68.67 307.95 14403.6 0.07 7642.17 9334.65 N 10969.88W 17225.00 68.62 307.94 14426.9 0.05 7651.28 9348.97 N 10988.24 W 17250.00 68.67 307.92 14450.2 0.05 7660.38 9363.28 N 11006.61 W 17275.00 68.68 307.88 14473.4 0.04 7669.47 9377 .58 N 11024.99W 17300.00 68.60 307.92 14496.7 0.09 7678.58 9391.89 N 11043.36W 17325.00 68.67 307.93 14520.0 0.07 7687.69 9406.20 N 11061.72W 17350.00 68.61 307.89 14543.2 0.07 7696.79 9420.50 N 11080.09W 17375.00 68.63 307.84 14566.5 0.05 7705.90 9434.79 N ] 1098.47W 17400.00 68.64 307.84 14589.8 0.01 7715.01 9449.07 N 11116.86W 17425.00 68.64 307.83 14613.0 0.01 7724.12 9463.35 N 11135.24 W 17450.00 68.73 307.79 14636.3 0.10 7733.21 9477.63 N 11153.65W 17475.00 68.69 307.79 14659.6 0.04 7742.28 9491.91 N 11172.05W 17500.00 68.70 307.78 14682.8 0.01 7751.37 9506.18 N 11190.46W . 17525.00 68.76 307.78 14706.1 0.06 77 60.44 9520.45 N 11208.87W 17550.00 68.70 307.78 14729.4 0.06 7769.50 9534.72 N 11227.29W 17575.00 68.69 307.75 14752.7 0.03 7778.59 9548.99 N 11245.70W 17600.00 68.72 307.79 14776.0 0.05 7787.67 9563.25 N 11264.11 W 17625.00 68.78 307.83 14799.2 0.07 7796.73 9577 .54 N 11282.52W 17650.00 68.83 307.82 14822.5 0.05 7805.77 9591.83 N 11300.93 W 17675.00 68.79 307.79 14845.8 0.05 7814.80 9606.12 N 11319.35W 17700.00 68.75 307.76 14869.1 0.05 7823.86 9620.39 N 11337.77W 29 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-2l Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINA TES feet deg. deg. feet deg.l feet feet 25 ft. 17725.00 68.76 307.76 14892.4 0.01 7832.91 9634.66 N 11356.19W 17750.00 68.82 307.77 14915.7 0.06 7841.96 9648.94 N 11374.61 W . 17775.00 68.84 307.72 14939.0 0.05 7850.99 9663.21 N 11393.05W 17800.00 68.83 307.69 14962.3 0.03 7860.01 9677.47 N 11411.49W 17825.00 68.84 307.71 14985.6 0.02 7869.04 9691.72 N 11429.94W 17850.00 68.85 307.75 15008.9 0.04 7878.06 9705.99 N 11448.38W 17875.00 68.82 307.77 15032.2 0.04 7887.09 9720.27 N 11466.81 W 17900.00 68.79 307.75 15055.5 0.04 7896.13 9734.54 N 11485.24 W 17925.00 68.74 307.72 15078.7 0.06 7905.18 9748.80 N 11503.67W 17950.00 68.73 307.69 15102.0 0.03 7914.25 9763.05 N 11522.lOW 17975.00 68.78 307.67 15125.3 0.05 7923.31 9777 .29 N 11540.54 W 18000.00 68.79 307.66 15148.6 0.01 7932.36 9791.53 N 11558.99W 18025.00 68.78 307.68 15171.9 0.02 7941.40 9805.78 N 11577.44 W 18050.00 68.74 307.72 15195.2 0.05 7950.46 9820.03 N 11595.88W 18075.00 68.71 307.75 15218.4 0.04 7959.53 9834.28 N 11614.30W 18100.00 68.63 307.77 15241.7 0.08 7968.62 9848.54 N 11632.71 W . 18125.00 68.43 307.82 15264.9 0.21 7977.77 9862.80 N 11651.09W 18150.00 68.22 307.90 15288.2 0.22 7987.01 9877.06 N 11669.44 W 18175.00 67.91 307.95 15311.3 0.31 7996.35 9891.31 N 11687.73 W 18200.00 67.62 308.02 15334.5 0.30 8005.81 9905.55 N 11705.97W 18225.00 67.38 308.07 15357.5 0.24 8015.37 9919.79 N 11724.16W 18250.00 67.15 308.13 15380.6 0.24 8025.04 9934.02 N 11742.30W 18275.00 67.01 308.16 15403.6 0.14 8034.77 9948.24 N 11760.41W 18300.00 66.65 308.15 15426.6 0.36 8044.61 9962.44 N 11778.48 W 30 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 18325.00 66.31 308.20 15449.5 0.34 8054.58 9976.61 N 11796.50W 18350.00 66.10 308.25 15472.4 0.21 8064.67 9990.76 N 11814.47W . 18375.00 65.85 308.32 15495.2 0.26 8074.85 10004.91 N 11832.40 W 18400.00 65.46 308.42 15517.9 0.40 8085.16 10019.05 N 11850.26W 18425.00 65.07 308.55 15540.6 0.41 8095.62 10033.18 N 11868.03 W 18450.00 64.82 308.67 15563.3 0.27 8106.20 10047.31 N 11885.73W 18475.00 64.48 308.78 15585.9 0.35 8116.91 10061.44 N 11903.35W 18500.00 63.97 308.94 15608.4 0.53 8127.78 10075.57 N 11nO.88W 18525.00 63.59 309.11 15630.8 0.41 8138.82 10089.69 N 11938.31 W 18550.00 63.11 309.24 15653.1 0.49 8150.04 10103.80 N 11955.63 W 18575.00 62.66 309.40 15675.4 0.47 8161.43 10117.90 N 11972.84 W 18600.00 62.38 309.55 15697.6 0.31 8172.97 10132.00 N 11989.96W 18625.00 61.91 309.74 15719.7 0.50 8184.65 10146.11 N 12006.98W 18650.00 61.59 309.87 15741.7 0.34 8196.48 10160.20 N 12023.90W 18675.00 61.28 309.97 15763.7 0.32 8208.43 10174.29 N 12040.74 W 18700.00 60.95 310.07 15785.5 0.34 8220.5 I 10188.37 N 12057.50W . 18725.00 60.64 310.20 15807.4 0.33 8232.71 10202.44 N 12074.19W 18750.00 60.15 310.25 15829.1 0.49 8245.06 10216.47 N 12090.78W 18775.00 59.79 310.28 15850.7 0.36 8257.57 10230.46 N 12107.30W 18800.00 59.34 310.30 15872.3 0.45 8270.24 10244.40 N 12123.74 W 18825.00 58.95 310.33 15893.8 0.39 8283.06 10258.29 N 12140.1] W 18850.00 58.51 310.42 15915.1 0.45 8296.03 10272.13 N 12156.38W 18875.00 57.99 310.47 15936.4 0.52 8309.19 10285.92 N 12172.56W 18900.00 57.53 310.47 15957.5 0.46 8322.53 10299.64 N 12188.65W 31 A Gyrodata Directiona] Survey BP Exp]oration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Is]and, A]aska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 f1. 18925.00 57.10 310.55 15978.6 0.44 8336.03 10313.31 N 12204.65W 18950.00 56.66 310.67 15999.5 0.45 8349.69 10326.94 N 12220.54 W . 18975.00 56.28 310.76 16020.4 0.39 8363.50 10340.53 N 12236.34 W 19000.00 55.83 310.86 16041.1 0.46 8377.45 10354.09 N 12252.04 W 19025.00 55.43 310.92 16061.7 0.40 8391.57 10367.60 N 12267.63 W 19050.00 54.96 310.94 ]6082.2 0.47 8405.84 10381.04 N 12283.14 W 19075.00 54.46 310.93 16102.6 0.50 8420.28 10394.41 N 12298.56W 19100.00 53.90 310.93 16122.9 0.56 8434.91 10407.70 N 12313.87W 19125.00 53.41 310.95 16143.0 0.49 8449.73 ] 0420.89 N ]2329.09W 19150.00 52.95 311.00 16163.1 0.46 8464.71 10434.01 N 12344.20W 19175.00 52.60 311.09 16183.0 0.36 8479.83 10447.08 N 12359.21 W 19200.00 52.32 311.15 16202.8 0.28 8495.07 10460.12 N 12374.14 W 19225.00 51.86 311.26 16222.5 0.47 8510.43 10473.11 N 12388.98W 19250.00 51.33 311.37 16242.1 0.54 8525.96 10486.05 N 12403.70W 19275.00 50.88 311.45 ]6261.5 0.45 8541.66 10498.92 N 12418.29W 19300.00 50.55 311.43 16280.9 0.33 8557.48 10511.73 N 12432.80W . 19325.00 50.17 311.33 16300.1 0.39 8573.43 10524.45 N 12447.24 W 19350.00 49.89 311.32 16319.3 0.28 8589.49 10537.10 N 12461.63W ] 9375.00 49.60 311.25 16338.4 0.29 8605.65 10549.69 N 12475.97W 19400.00 49.30 311.13 16357.4 0.31 8621.90 10562.20 N ]2490.26W 19425.00 48.88 311.07 16376.2 0.42 8638.27 10574.62 N 12504.50W 19450.00 48.50 310.90 16395.0 0.40 8654.78 10586.94 N ]2518.67W 19475.00 48.19 310.77 ]6413.7 0.32 8671.39 ]0599.]5 N ]2532.81 W 19500.00 47.89 310.69 16432.3 0.31 8688.] 1 106] 1.28 N 12546.89W 19525.00 47.47 3] 0.59 16450.8 0.43 8704.94 10623.32 N 12560.92W 32 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 deg. deg. 25 ft. VERTICAL SECTION feet DOGLEG SEVERITY deg./ VERTICAL DEPTH feet HORIZONTAL COORDINATES feet MEASURED DEPTH feet IN C L AZIMUTH 19550.00 47.14 310.52 16469.1 0.33 8721.89 10635.27 N 12574.88W . 19575.00 46.79 310.36 16487.4 0.37 8738.95 10647.12 N 12588.79W 19600.00 46.50 310.17 16505.6 0.32 8756.12 10658.87 N 12602.66 W 19625.00 46.08 309.94 16523.7 0.45 8773.39 10670.50 N 12616.49W 19650.00 45.59 309.75 16541.6 0.51 8790.81 10681.99 N 12630.26W 19675.00 45.15 309.60 16559.4 0.45 8808.37 10693.35 N 12643.95W 19700.00 44.82 309.49 16577.0 0.34 8826.05 10704.60 N l2657.58W 19725.00 44.35 309.34 ] 6594.6 0.48 8843.86 10715.74 N 12671.14 W 19750.00 44.11 309.23 16612.0 0.25 8861.77 10726.78 N 12684.64 W 19775.00 43.60 309.00 16629.4 0.53 8879.80 10737.71 N l2698.08W 19800.00 43.04 308.76 16646.5 0.58 8897.99 10748.48 N 12711.43 W 19825.00 42.77 308.59 16663.5 0.29 8916.30 10759.11 N 12724.7] W 19850.00 42.28 308.36 16680.4 0.51 8934.72 10769.63 N 12737.94 W 19875.00 41.83 308.14 16697.2 0.47 8953.29 10779.99 N 12751.09W 19900.00 41.39 307.88 16713.7 0.47 8971.98 10790.22 N 12764.17W 19925.00 41.11 307.63 16730.2 0.32 8990.78 10800.31 N 12777.21 W . 19950.00 41.01 307.42 16746.6 0.17 9009.63 1081O.31N 12790.23W 19975.00 40.27 307.08 ]6762.9 0.77 9028.60 10820.]7 N 12803.19W 20000.00 39.68 306.85 16778.9 0.61 9047.75 10829.83 N 12816.02W 20025.00 39.40 306.78 16794.8 0.28 9067.03 10839.36 N 12828.77W 20050.00 38.89 306.71 16810.6 0.51 9086.42 10848.81 N 12841.4] W 20075.00 38.32 306.69 16826.1 0.57 9105.96 10858.13 N 12853.92W 20100.00 37.81 306.73 16841.5 0.51 9125.64 10867.34 N 12866.28W 20125.00 37.54 306.74 16856.8 0.27 9145.43 10876.48 N 12878.52W 33 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 20150.00 37.24 306.68 16871.9 0.30 9165.29 10885.56 N 12890.69W . 20175.00 37.01 306.61 16887.0 0.23 9185.23 10894.56 N 12902.80W 20200.00 37.11 306.57 16902.0 0.10 9205.18 10903.54 N 12914.89W 20225.00 36.93 306.67 16917 .1 0.19 9225.14 10912.52 N 12926.98W 20250.00 36.61 306.85 16932.0 0.34 9245.16 10921.48 N 12938.96W 20275.00 36.24 306.87 16946.8 0.37 9265.28 10930.38 N 12950.84 W 20300.00 35.81 306.74 16961.5 0.44 9285.50 10939.19 N 12962.61 W 20325.00 35.45 306.59 16976.0 0.37 9305.82 10947.89 N 12974.30W 20350.00 34.97 306.42 16990.4 0.49 9326.24 10956.46 N 12985.88 W 20375.00 34.55 306.23 17004.7 0.43 9346.78 10964.90 N 12997.37W 20400.00 34.09 305.95 17018.7 0.49 9367.43 10973.21 N 13008.76W 20425.00 33.65 305.68 17032.6 0.47 9388.19 10981.36 N 1 3020.05 W 20450.00 33.33 305.48 17046.4 0.34 9409.04 10989.39 N 13031.27 W 20475.00 32.93 305.33 17060.0 0.41 9429.97 10997.30 N 13042.41 W 20500.00 32.60 305.33 17073.5 0.33 9450.99 11005.13 N 13053.45W 20525.00 32.26 305.64 17086.8 0.38 9472.10 11012.91 N 13064.36W . 20550.00 31.89 306.19 17100.1 0.47 9493.28 11020.70 N 13075.12W 20575.00 31.51 306.96 17113.2 0.56 9514.55 11028.52 N 13085.67W 20600.00 31.13 307.62 17126.2 0.51 9535.91 11036.40 N 13096.01 W 20625.00 30.86 308.24 17139.0 0.42 9557.34 11044.31 N 13106.16W 20650.00 30.51 309.01 17151.8 0.53 9578.84 11052.27 N 13116.13W 20675.00 30.18 309.83 17164.4 0.53 9600.41 11060.29 N 13125.88W 20700.00 29.80 310.65 17176.9 0.56 9622.06 11068.37 N 13135.42W 20725.00 29.38 311.41 17189.3 0.56 9643.80 11076.47 N 13144.74 W 34 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 f1. 20750.00 29.09 312.13 17201.5 0.46 9665.62 11084.60 N 13153.84 W 20775.00 28.84 312.76 17213.6 0.39 9687.49 11092.77 N 13162.78W . 20800.00 28.77 313.06 17225.6 0.16 9709.40 11100.97 N 13171.60W 20825.00 28.78 313.05 17237.6 0.01 9731.31 11109.19N 13180.39W 20850.00 28.78 312.94 17249.6 0.05 9753.22 11117.40 N 13189.20W 20875.00 28.84 312.95 17261.7 0.06 9775.13 11125.60 N 13198.02W 20900.00 28.79 313.03 17273.7 0.06 9797.03 11133.82 N 13206.83 W 20925.00 28.83 313.11 17285.7 0.06 9818.94 11142.05 N 13215.63W 20950.00 28.84 313.19 17297.8 0.04 9840.84 11150.29 N 13224.43 W 20975.00 28.54 313.04 17309.8 0.31 9862.77 11158.50 N 13233.19W 21000.00 27.95 312.74 17321.6 0.61 9884.79 11166.55 N 13241.86W 21025.00 27.28 312.53 17333.2 0.68 9906.95 11174.40 N 13250.38W 21050.00 26.85 312.26 17344.5 0.45 9929.21 11182.07 N 13258.78W 21075.00 26.30 311.94 17355.7 0.57 9951.57 11189.57 N 13267.08W 21100.00 25.75 311.68 17366.7 0.56 9974.03 11196.88 N 13275.25 W 21125.00 25.26 311.29 17377.4 0.52 9996.60 11204.01 N 13283.32 W . 21150.00 24.67 310.87 17388.0 0.62 10019.26 11210.94 N 13291.27W 21175.00 24.18 310.56 17398.3 0.51 10042.02 11217.69N 13299.11 W 21200.00 23.67 310.15 17408.4 0.54 10064.87 11224.25 N 13306.83 W 21225.00 23.30 309.90 17418.4 0.38 10087.80 11230.66 N 13314.46W 21250.00 22.92 309.89 17428.2 0.38 10110.80 11236.95 N 13321.99W 21275.00 22.48 309.79 17437.9 0.44 10133.86 11243.13 N 13329.40W 21300.00 22.16 309.75 17447.3 0.32 10156.99 11249.21 N 13336.70W 21325.00 21.73 309.67 17456.7 0.43 10180.18 11255.18 N 13343.88W 35 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg.l feet feet 25 ft. 21350.00 21.29 309.38 17465.9 0.45 10203.43 11261.01 N 13350.95 W 21375.00 20.82 309.12 17474.8 0.48 10226.77 11266.69 N 13357.91 W . 21400.00 20.27 309.06 17483.6 0.55 10250.17 11272.23 N 13364.72W 21425.00 19.80 308.94 17492.2 0.47 10273.66 11277.62 N 13371.37W 21450.00 19.29 308.79 17500.5 0.51 10297.22 11282.86 N 13377.89W 21475.00 18.91 308.72 17508.7 0.38 10320.84 11287.99 N 13384.27W 21500.00 18.54 308.72 17516.7 0.37 10344.52 11293.01 N 13390.53 W 21525.00 18.16 308.72 17524.6 0.38 10368.25 11297.93 N 13396.67W 21550.00 17.85 308.83 17532.3 0.31 10392.03 11302.77 N ] 3402.69 W 21575.00 17.46 308.89 17539.9 0.39 10415.85 ] 1307.53 N 13408.60W 2]600.00 17.18 308.83 17547.4 0.28 10439.7] 11312.]9 N 13414.39W 21625.00 16.86 308.76 17554.7 0.32 10463.62 113]6.78 N 13420. lOW 21650.00 16.49 308.50 17561.8 0.38 10487.57 11321.26 N ]3425.70W 21675.00 16.10 308.75 17568.9 0.40 10511.56 11325.64 N 13431.18 W 21700.00 15.78 309.05 17575.7 0.33 10535.60 11329.95 N 13436.52 W 21725.00 15.40 309.02 17582.4 0.38 10559.68 11334.18 N 13441.74 W . 21750.00 15.10 309.11 17589.0 0.30 10583.80 ] 1338.32 N 13446.85W 21775.00 14.83 309.26 17595.5 0.27 10607.95 11342.40 N 13451.85W 21800.00 14.47 309.33 17601.8 0.36 10632.14 11346.41 N 13456.74 W 21825.00 14.24 309.24 17608.0 0.23 10656.36 11350.33 N 13461.54 W 21850.00 13.95 309.14 17614.1 0.29 10680.61 11354.18 N 13466.26W 21875.00 13.63 308.99 17620.0 0.32 10704.89 11357.93 N 13470.89W 21900.00 13.38 309.00 17625.9 0.25 10729.20 11361.61 N 13475.42 W 21925.00 13.07 309.13 17631.6 0.31 10753.53 11365.21 N 13479.87W 36 A Gyrodata Directional Survey BP Exploration Lease: Northstar Well: NS-21 Location: Mast Truck, Northstar Island, Alaska Job Number: AK0604G_509 MEASURED INCL AZIMUTH VERTICAL DOGLEG VERTICAL HORIZONTAL DEPTH SECTION SEVERITY DEPTH COORDINATES feet deg. deg. feet deg./ feet feet 25 ft. 21950.00 12.74 309.39 17637.2 0.34 10777.90 1l368.75 N 13484.19W 21975.00 13.00 309.38 17642.7 0.26 10802.27 11372.28 N 13488.49W . 22000.00 14.31 308.07 17648.6 1.35 10826.57 ] ] 375.97 N 13493. lOW 22025.00 16.23 305.82 17655.2 2.01 10850.68 11379.92 N 13498.36W 22050.00 17.36 304.21 17662.4 1.22 10874.62 11384.06 N 13504.28W 22075.00 17.35 303.64 17669.8 0.17 10898.48 11388.22 N 13510.47W 22100.00 16.58 303.79 17677.1 0.77 10922.39 11392.27 N 13516.54 W 22125.00 15.59 305.09 17684.0 1.05 10946.4] 11396.19 N ] 3522.25 W 22150.00 15.19 307.00 17690.6 0.65 10970.52 1l400.09 N 13527.62W 22175.00 14.98 308.59 17697.1 0.46 10994.65 11404.07 N 13532.76W 22200.00 14.53 309.69 17703.5 0.53 11018.83 1l408.09 N 13537.70 W 22225.00 13.98 310.85 17709.6 0.62 11043.06 114]2.07 N 13542.39 W 22236.80 13.71 311.54 17712.4 0.67 ] 1054.52 1 ]413.93 N 13544.52 W -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- THE FOLLOWING DEPTH IS A PROJECTION TO TD -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 22261.00 13.71 311.54 17718.2 0.00 11078.03 11417.73 N 13548.81 W . Final Station Closure: Distance: 17718.21 ft Az: 310.12 deg. 37 õZ ~;:t. ... ~/~ ~ .. e e Ò NS21 Survey Report Schlumberuer Report Date: 16-Apr·04 Survey I DLS Computation Method: Minimum Curvature / Lubinski l>., 1 t.. à......"..J, Client: BP Exploration Alaska Vertical Section Azimuth: 309.860· Field: Northstar Vertical Section Origin: N 0.000 fl E 0.000 ft ~ structure I Slot: Northstar PF / NS21 TVD Reference Datum: KB Well: NS21 TVD Reference Bevation: 56.19 ft relative to MSL Borehole: NS21 Sea Bed I Ground Level Elevation: 15.67 ftrelative to MSL >J~À-6<)'-" ~ UWIIAPI#: 500292312600 Magnetic Declination: 25.973· Survey Name I Date: NS21/ April 16, 2004 Total Field Strength: 57562.246 nT TortI AHD I DOlI ERD ratio: 219.985·/17676.73 ft/6.888/1.577 Magnetic Dip: 80.971· u)~~~~!> )'4 t.<.r Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: December 20, 2002 Location LatlLong: N 70.49129601, W 148.69331095 Magnetic Declination Model: BGGM 2003 Location Grid NlE Y/x: N 6031021.480 flUS, E 659827.320 ftUS North Reference: True North Grid Convergence Angle: +1.23169690· Total Corr Mag North"" True North: +25.973· Grid Scale Factor: 0.99992902 Local Coordinates Referenced To: Well Head Measured I Inclination I Azimuth I TVD I Sub-Sea TVD I Vertical I Along Hole I NS EW I DLS I Build Rate I Walk Rate I Northing Easting Latitude Longitude Depth Section Departure (It) (deg) (dog ) (It) (It) (It) (It) (It) (It) (deg1100 It) (deg/100 It) (dog1100 It) (flUS) (flUS) 0.00 0.00 0.00 0.00 -56.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6031021.48 659827.32 N 70.49129601 W 148.69331095 50.00 0.58 252.19 50.00 -6.19 0.14 0.25 -0.08 -0.24 1.16 1.16 0.00 6031021.40 659827.08 N 70.49129580 W 148.69331292 100.00 0.95 260.04 99.99 43.80 0.54 0.92 -0.23 -0.89 0.77 0.74 15.70 6031021.23 659826.44 N 70.49129539 W 148.69331823 150.00 1.65 266.51 149.98 93.79 1.33 2.05 -0.34 -202 1.43 1.40 12.94 6031021.09 659825.31 N 70.49129507 W 148.69332744 200.00 1.76 280.58 199.96 143.77 2.52 3.53 -0.24 -3.49 0.86 0.22 28.14 6031021.16 659823.84 N 70.49129534 W 148.69333948 250.00 1.97 295.25 249.93 193.74 4.02 5.15 0.26 -5.02 1.04 0.42 29.34 6031021.63 659822.29 N 70.49129673 W 148.69335201 300.00 2.01 296.85 299.90 243.71 5.71 6.89 1.03 -6.58 0.14 0.08 3.20 6031022.36 659820.72 N 70.49129881 W 148.69336476 350.00 2.13 302.86 349.87 293.68 7.49 8.69 1.93 -8.14 0.50 0.24 1202 6031023.23 659819.14 N 70.49130127 W 148.69337753 400.00 2.12 308.96 399.84 343.65 9.33 10.54 3.01 -9.64 0.45 -0.02 12.20 6031024.28 659817.61 N 70.49130423 W 148.69338979 450.00 2.24 321.94 449.80 393.61 11.21 12.44 4.36 -10.97 101 0.24 25.96 6031025.61 659816.26 N 70.49130792 W 148.69340059 500.00 2.06 334.78 499.77 443.58 12.98 14.31 5.94 ·11.95 1.03 -0.36 25.68 6031027.17 659815.24 N 70.49131225 W 148.69340865 550.00 2.88 334.85 549.72 493.53 14.94 16.46 7.89 ·12.87 1.64 1.64 0.14 6031029.10 659814.29 N 70.49131757 W 148.69341614 600.00 3.84 335.72 599.63 543.44 17.58 19.39 10.56 -14.09 1.92 1.92 1.74 6031031.73 659813.01 N 70.49132485 W 148.69342613 650.00 4.36 335.23 649.50 593.31 20.81 22.97 13.81 -15.57 1.04 1.04 -0.98 6031034.95 659811.45 N 70.49133373 W 148.69343827 700.00 4.64 336.26 699.35 643.16 24.34 26.89 17.39 -17.19 0.58 0.56 2.06 6031038.49 659809.77 N 70.49134351 W 148.69345143 750.00 5.00 336.22 749.17 692.98 28.10 31.09 21.23 -18.88 0.72 0.72 -0.08 6031042.30 659807.99 N 70.49135401 W 148.69346527 840.00 6.50 331.12 838.72 782.53 36.36 40.10 29.28 -22.92 1.76 1.67 -5.67 6031050.26 659803.78 N 70.49137600 W 148.69349831 930.00 8.32 321.74 927.97 871.78 47.48 51.68 38.86 -29.41 2.42 2.02 -10.42 6031059.69 659797.08 N 70.49140216 W 148.69355139 1020.00 10.36 319.37 1016.77 960.58 61.84 66.29 50.11 -38.72 2.31 2.27 -2.63 6031070.75 659787.54 N 70.49143291 W 148.69362743 1117.00 13.34 320.19 1111.69 1055.50 81.45 86.20 65.33 -51.56 3.08 3.07 0.85 6031085.68 659774.37 N 70.49147448 W 148.69373245 1209.00 14.95 323.95 1200.90 1144.71 103.41 108.68 83.08 -65.34 2.01 1.75 4.09 6031103.13 659760.21 N 70.49152297 W 148.69384509 1303.00 16.05 328.09 1291.48 1235.29 127.51 133.79 103.92 -79.35 1.66 1.17 4.40 6031123.66 659745.76 N 70.49157989 W 148.69395957 1397.00 19.55 324.65 1380.97 1324.78 155.07 162.51 127.78 -95.32 3.89 3.72 -3.66 6031147.17 659729.28 N 70.49164509 W 148.69409015 1489.08 21.77 323.66 1467.12 1410.93 186.55 194.99 154.11 -114.36 2.44 2.41 -1.08 6031173.08 659709.69 N 70.49171700 W 148.69424575 1584.38 23.43 322.67 1555.10 1498.91 222.19 231.62 183.41 -136.32 1.79 1.74 -1.04 6031201.90 659687.10 N 70.49179705 W 148.69442529 1679.94 25.61 320.71 1642.04 1585.85 261.00 271.27 214.50 -160.92 2.43 2.28 -2.05 6031232.46 659661.84 N 70.49188200 W 148.69462641 1773.48 28.13 319.01 1725.48 1669.29 302.64 313.54 246.80 -188.19 2.82 2.69 -1.82 6031264.16 659633.88 N 70.49197023 W 148.69484934 1866.86 30.98 319.97 1806.70 1750.51 348.04 359.60 281.83 -218.10 3.09 3.05 1.03 6031298.53 659603.23 N 70.49206591 W 148.69509379 1958.74 30.42 320.57 1885.70 1829.51 394.18 406.50 317.90 -248.08 0.69 -0.61 0.65 6031333.95 659572.48 N 70.49216446 W 148.69533890 2054.35 32.91 320.10 1967.07 1910.88 443.53 456.69 356.53 -280.12 2.62 2.60 -0.49 6031371.88 659539.62 N 70.49226998 W 148.69560082 2149.08 35.37 319.56 2045.47 1989.28 495.89 509.85 397.14 -314.42 2.62 2.60 -0.57 6031411.75 659504.46 N 70.49238093 W 148.69588120 2241.71 37.30 316.43 2120.09 2063.90 550.20 564.72 437.89 -351.16 2.89 2.08 -3.38 6031451.69 659466.86 N 70.49249225 W 148.69618157 2337.72 40.94 314.04 2194.57 2138.38 610.50 625.28 480.85 -393.84 4.10 3.79 -2.49 6031493.72 659423.27 N 70.49260960 W 148.69653048 2430.93 43.38 314.52 2263.66 2207.47 672.87 687.84 524.53 -438.62 2.64 2.62 0.51 6031536.43 659377.56 N 70.49272892 W 148.69689659 2523.81 45.68 315.15 2329.87 2273.68 737.75 752.97 570.46 -484.80 2.52 2.48 0.68 6031581.35 659330.41 N 70.49285438 W 148.69727414 2617.72 48.72 313.91 2393.67 2337.48 806.42 821.87 618.76 -533.93 3.38 3.24 -1.32 6031628.58 659280.26 N 70.49298632 W 148.69767577 2713.32 52.26 314.01 2454.48 2398.29 879.98 895.61 669.95 -587.01 3.70 3.70 0.10 6031678.61 659226.09 N 70.49312616 W 148.69810974 2807.17 55.37 312.91 2509.89 2453.70 955.57 971.35 722.04 -641.99 3.45 3.31 -1.17 6031729.50 659170.00 N 70.49326844 W 148.69855927 2902.71 57.99 312.53 2562.36 2506.17 1035.29 1051.18 776.19 -700.64 2.76 2.74 -0.40 6031782.37 659110.21 N 70.49341636 W 148.69903878 2995.62 60.94 311.58 2609.56 2553.37 1115.25 1131.19 829.78 -760.06 3.29 3.18 -1.02 6031834.67 659049.65 N 70.49356275 W 148.69952457 3090.26 63.71 309.38 2653.52 2597.33 1199.04 1215.00 884.16 -823.81 3.58 2.93 -2.32 6031887.67 658984.75 N 70.49371130 W 148.70004581 3186.48 66.57 308.71 2693.97 2637.78 1286.33 1302.29 939.15 -891.61 3.04 2.97 -0.70 6031941.18 658915.79 N 70.49386149 W 148.70060015 3282.46 67.78 309.47 2731.20 2675.01 1374.78 1390.75 994.93 -960.27 1.46 1.26 0.79 6031995.47 658845.95 N 70.49401385 W 148.70116151 3377.60 65.51 310.56 2768.91 2712.72 1462.12 1478.09 1051.08 -1027.17 2.61 -2.39 1.15 6032050.16 658777.87 N 70.49416722 W 148.70170846 3473.84 65.29 310.26 2808.98 2752.79 1549.62 1565.60 1107.81 -1093.80 0.36 -0.23 -0.31 6032105.44 658710.05 N 70.49432216 W 148.70225324 3568.11 67.62 311.58 2846.63 2790.44 1636.02 1652.01 1164.41 -1159.09 2.79 2.47 1.40 6032160.63 658643.56 N 70.49447678 W 148.70278709 3662.20 69.86 312.20 2880.75 2824.56 1723.64 1739.69 1222.96 -1224.35 2.46 2.38 0.66 6032217.75 658577.05 N 70.49463670 W 148.70332078 3756.63 68.98 314.03 2913.94 2857.75 1811.90 1828.09 1283.38 -1288.89 2.04 -0.93 1.94 6032276.76 658511.24 N 70.49480171 W 148.70384845 3852.41 67.22 314.08 2949.67 2893.48 1900.53 1916.96 1345.17 -1352.75 1.84 -1.84 0.05 6032337.16 658446.07 N 70.49497049 W 148.70437068 3947.76 69.38 313.28 2984.92 2928.73 1988.92 2005.55 1406.34 -1416.82 2.40 2.27 -0.84 6032396.94 658380.70 N 70.49513758 W 148.70489459 4043.13 70.13 312.87 3017.92 2961.73 2078.25 2095.02 1467.45 -1482.18 0.88 0.79 -0.43 6032456.63 658314.05 N 70.49530449 W 148.70542906 4138.06 70.88 313.78 3049.60 2993.41 2167.57 2184.51 1528.85 ·1547.28 1.20 0.79 0.96 6032516.61 658247.65 N 70.49547219 W 148.70596139 4232.58 71.33 312.12 3080.21 3024.02 2256.87 2273.94 1589.78 -1612.73 1.73 0.48 -1.76 6032576.11 658180.91 N 70.49563860 W 148.70649665 4330.18 70.19 312.13 3112.38 3056.19 2348.94 2366.08 1651.59 -1681.08 1.17 -1.17 0.01 6032636.43 658111.25 N 70.49580741 W 148.70705554 4425.25 69.40 312.57 3145.21 3089.02 2438.08 2455.30 1711.69 -1747.01 0.94 -0.83 0.46 6032695.10 658044.05 N 70.49597156 W 148.70759476 SurveyEditor Ver 3.1 RT-SP3.03-HF4.00 Bld( do31 rt-546 } NS21\NS211NS21\NS21 Generated 4/27/2004 2:25 PM Page 1 of 4 e e Measured Inclination I Azimuth I TVD I SUb-Sea TVD I Vertical I Along HOle NS EW DlS I Build Rate I Walk Rate I Northing Easting latitude Longitude Depth Section DeparbJre (II) (deg) (deg) (II) (II) (II) (II) (II) (II) (deg/100 II) (deg/100 II) (deg1100 II) (IIUS) (IIUS) 4520.31 69.03 312.70 3178.94 3122.75 2526.85 2544.18 1771.89 -1812.40 0.41 -0.39 0.14 6032753.87 657977.39 N 70.49613596 W 148.70812946 4552.11 68.93 313.55 3190.35 3134.16 2556.48 2573.86 1792.18 -1834.06 2.51 -0.31 2.67 6032773.69 657955.30 N 70.49619138 W 148.70830664 4674.52 68.55 314.65 3234.74 3178.55 2670.25 2687.94 1871.57 -1915.98 0.89 -0.31 0.90 6032851.29 657871.69 N 70.49640820 W 148.70897662 4770.87 68.32 314.11 3270.15 3213.96 2759.57 2777.54 1934.24 -1980.03 0.57 -0.24 -0.56 6032912.57 657806.32 N 70.49657936 W 148.70950038 4866.20 67.72 313.73 3305.83 3249.64 2847.75 2865.94 1995.56 -2043.70 0.73 -0.63 -0.40 6032972.50 657741.35 N 70.49674683 W 148.71002115 4960.57 67.62 313.18 3341.69 3285.50 2934.87 2953.24 2055.59 -210707 0.55 -0.11 -0.58 6033031.16 657676.71 N 70.49691080 W 148.71053941 5056.90 67.70 312.42 3378.30 3322.11 3023.85 3042.34 2116.13 -2172.44 0.73 0.08 -0.79 6033090.27 657610.05 N 70.49707613 W 148.71107409 5150.32 68.61 312.14 3413.06 3356.87 3110.49 3129.05 2174.47 -2236.60 1.01 0.97 -0.30 6033147.21 657544.66 N 70.49723544 W 148.71159880 5247.03 68.91 312.31 3448.1 0 3391.91 3200.55 3219.19 2235.05 -2303.35 0.35 0.31 0.18 6033206.34 657476.63 N 70.49740088 W 148.71214474 5342.42 68.91 311.65 3482.42 3426.23 3289.49 3308.19 2294.57 -2369.51 0.65 0.00 -0.69 6033264.43 657409.21 N 70.49756345 W 148.71268587 5436.92 68.82 311.59 3516.50 3460.31 3377.59 3396.33 2353.12 -2435.40 0.11 ·0.10 -0.06 6033321.54 657342.08 N 70.49772332 W 148.71322482 5531.98 68.68 311.26 3550.95 3494.76 3466.15 3484.93 2411.74 -2501.83 0.36 -0.15 -0.35 6033378.71 657274.41 N 70.49788340 W 148.71376818 5626.30 68.53 310.74 3585.36 3529.17 3553.96 3572.75 2469.35 -2568.11 0.54 -0.16 -0.55 6033434.88 657206.91 N 70.49804074 W 148.71431030 5720.57 68.51 309.94 3619.88 3563.69 3641.68 3660.47 2526.14 -2634.97 0.79 ·0.02 -0.85 6033490.21 657138.85 N 70.49819580 W 148.71485720 5815.91 68.66 309.16 3654.69 3598.50 3730.43 3749.23 2582.65 -2703.41 0.78 0.16 -0.82 6033545.24 657069.22 N 70.49835013 W 148.71541699 5911.42 68.79 308.50 3689.35 3633.16 3819.42 3838.23 2638.46 -2772.74 0.66 0.14 -0.69 6033599.54 656998.71 N 70.49850250 W 148.71598409 6005.99 68.67 308.28 3723.65 3667.46 3907.52 3926.36 2693.19 -2841.82 0.25 -0.13 -0.23 6033652.76 656928.48 N 70.49865194 W 148.71654910 6102.53 68.49 307.15 3758.91 3702.72 3997.32 4016.23 2748.16 -2912.91 1.11 -0.19 -1.17 6033706.20 656856.23 N 70.49880206 W 148.71713061 6198.72 68.28 307.06 3794.34 3738.15 4086.65 4105.66 2802.11 -2984.23 0.24 -0.22 -0.09 6033758.60 656783.77 N 70.49894936 W 148.71771399 6292.02 68.77 306.71 3828.50 3772.31 4173.35 4192.48 2854.22 -3053.68 0.63 0.53 -0.38 6033809.20 656713.22 N 70.49909165 W 148.71828204 6387.14 69.29 306.56 3862.54 3806.35 4262.03 4281.30 2907.22 -3124.95 0.57 0.55 -0.16 6033860.65 656640.83 N 70.49923635 W 148.71886505 6482.64 69.34 306.18 3896.27 3840.08 4351.21 4370.64 2960.20 -3196.89 0.38 0.05 -0.40 6033912.07 656567.78 N 70.49938101 W 148.71945352 6578.20 69.40 306.31 3929.94 3873.75 4440.46 4460.07 3013.08 -3269.02 0.14 0.06 0.14 6033963.38 656494.53 N 70.49952537 W 148.72004353 6674.19 69.16 306.17 3963.90 3907.71 4530.06 4549.85 3066.15 -3341.43 0.28 -0.25 -0.15 6034014.88 656421.00 N 70.49967028 W 148.72063588 6769.64 69.13 306.43 3997.89 3941.70 4619.09 4639.05 3118.96 -341331 0.26 -0.03 0.27 6034066.13 656348.00 N 70.49981445 W 148.72122394 6864.73 68.91 307.15 4031.93 3975.74 4707.75 4727.84 3172.13 -3484.42 0.74 -0.23 0.76 6034117.75 656275.78 N 70.49995962 W 148.72180560 6960.54 68.63 307.70 4066.63 4010.44 4796.97 4817.14 3226.41 ·3555.34 0.61 -0.29 0.57 6034170.49 656203.71 N 7050010779 W 148.72238580 7055.57 68.39 308.10 4101.44 4045.25 4885.34 4905.57 3280.72 -362511 0.47 -0.25 0.42 6034223.29 656132.79 N 70.50025609 W 148.72295661 7149.83 68.25 308.78 4136.26 4080.07 4972.91 4993.16 3335.18 -3693.72 0.69 -0.15 0.72 6034276.25 656063.04 N 70.50040476 W 148.72351789 7244.67 68.02 309.23 4171.58 4115.39 5060.92 5081.18 3390.57 -3762.12 0.50 -0.24 0.47 6034330.16 655993.47 N 70.50055600 W 148.72407747 7338.28 67.76 309.70 4206.82 4150.63 5147.64 5167.90 3445.70 -3829.07 0.54 -0.28 0.50 6034383.83 655925.35 N 70.50070650 W 148.72462525 7432.10 67.57 310.32 4242.47 4186.28 5234.42 5254.68 3501.49 -3895.54 0.64 -0.20 0.66 6034438.18 655857.70 N 70.50085882 W 148.72516907 7526.48 67.07 310.97 4278.86 4222.67 5321.49 5341.77 3558.21 ·3961.62 0.83 -0.53 0.69 6034493.46 655790.43 N 70.50101368 W 148.72570968 7620.28 67.17 311.40 4315.33 4259.14 5407.89 5428.19 3615.12 -4026.65 0.44 0.11 0.46 6034548.95 655724.19 N 70.50116905 W 148.72624182 7713.79 67.36 311.68 4351.47 4295.28 5494.10 5514.43 3672.31 -4091.21 0.34 0.20 0.30 6034604.74 655658.42 N 70.50132520 W 148.72677001 7807.06 68.72 311.18 4386.35 4330.16 5580.57 5600.93 3729.55 -4156.06 1.54 1.46 -0.54 6034660.56 655592.36 N 70.50148146 W 148.72730069 7901.15 69.42 311.92 4419.96 4363.77 5668.41 5688.81 3787.84 -4221.83 1.05 0.74 0.79 6034717.42 655525.36 N 70.50164060 W 148.72783882 7995.84 69.26 312.43 4453.37 4397.18 5756.94 5777.41 3847.32 -4287.49 0.53 -0.17 0.54 6034775.48 655458.44 N 70.50180300 W 148.72837611 8091.65 68.95 311.77 4487.54 4431.35 5846.38 5866.92 3907.33 -4353.90 072 -0.32 -0.69 6034834.04 655390.76 N 70.50196683 W 148.72891955 8185.16 68.85 311.51 4521.20 4465.01 5933.57 5954.16 3965.30 -4419.10 0.28 -0.11 -0.28 6034890.59 655324.33 N 70.50212509 W 148.72945305 8280.01 68.92 311.26 4555.37 4499.18 6022.02 6042.64 4023.79 -4485.49 0.26 0.07 -0.26 6034947.64 655256.71 N 70.50228478 W 148.72999629 8375.40 69.39 311.35 4589.32 4533.13 6111.14 6131.79 4082.64 -4552.46 0.50 0.49 0.09 6035005.03 655188.50 N 70.50244542 W 148.73054429 8469.55 69.59 311.05 4622.30 4566.11 6199.30 6219.97 4140.72 -4618.80 0.37 0.21 -0.32 6035061.67 655120.92 N 70.50260399 W 148.73108723 8563.36 69.65 311.33 4654.97 4598.78 6287.21 6307.91 4198.63 -4684.98 0.29 0.06 0.30 6035118.14 655053.52 N 70.50276208 W 148.73162877 8657.37 69.78 311.18 4687.57 4631.38 6375.37 6396.09 4256.78 -4751.27 0.20 0.14 -0.16 6035174.84 654986.00 N 70.50292082 W 148.73217127 8751.63 69.92 310.66 4720.04 4663.85 6463.84 6484.58 4314.74 -4818.14 0.54 0.15 -0.55 6035231.35 654917.91 N 70.50307904 W 148.73271846 8846.01 70.17 310.01 4752.25 4696.06 6552.55 6573.29 4372.16 -4885.76 0.70 0.26 -0.69 6035287.30 654849.07 N 70.50323578 W 148.73327187 8939.81 70.27 309.65 4783.99 4727.80 6640.82 6661.56 4428.70 -4953.54 0.38 0.11 -0.38 6035342.36 654780.09 N 70.50339011 W 148.73382658 9034.50 70.31 309.84 4815.92 4759.73 6729.96 6750.70 4485.69 -5022.09 0.19 0.04 0.20 6035397.86 654710.35 N 70.50354569 W 148.73438750 9128.76 70.46 309.52 4847.57 4791.38 6818.75 6839.49 4542.38 -5090.42 0.36 0.16 -0.34 6035453.07 654640.81 N 70.50370043 W 148.73494674 9224.15 70.78 309.62 4879.22 4823.03 6908.73 6929.48 4599.71 -5159.79 0.35 0.34 0.10 6035508.88 654570.24 N 7050385690 W 148.73551442 9319.06 70.47 309.44 4910.71 4854.52 6998.27 7019.01 4656.69 -5228.84 0.37 -0.33 -0.19 6035564.37 654499.98 N 70.50401245 W 148.73607958 9412.39 70.20 310.07 4942.11 4885.92 7086.15 7106.90 4712.90 -5296.41 0.70 -0.29 0.68 6035619.10 654431.22 N 70.50416586 W 148.73663256 9506.09 69.90 309.88 4974.09 4917.90 7174.23 7194.97 4769.48 -5363.90 0.37 -0.32 -0.20 6035674.22 654362.53 N 70.50432031 W 148.73718497 9599.74 69.60 309.85 5006.50 4950.31 7262.09 7282.84 4825.80 -5431.34 0.32 -0.32 -0.03 6035729.07 654293.90 N 70.50447403 W 148.73773692 9693.49 69.22 309.43 5039.47 4983.28 7349.85 7370.60 4881.79 -5498.92 0.58 -0.41 -0.45 6035783.59 654225.14 N 70.50462685 W 148.73829005 9786.68 69.07 309.54 5072.64 5016.45 7436.93 7457.68 4937.16 ·5566.14 0.20 -0.16 0.12 6035837.50 654156.76 N 70.50477799 W 148.73884014 9880.19 68.70 309.52 5106.33 5050.14 7524.16 7544.91 4992.68 -5633.42 0.40 -0.40 -0.02 6035891.56 654088.30 N 70.50492953 W 148.73939083 9974.01 68.44 309.66 5140.61 5084.42 7611.50 7632.25 5048.34 -5700.72 0.31 -0.28 0.15 6035945.76 654019.83 N 70.50508143 W 148.73994168 10068.45 68.13 309.93 5175.55 5119.36 7699.23 7719.98 5104.50 -5768.13 0.42 -0.33 0.29 6036000.45 653951.23 N 7050523470 W 148.74049346 10162.54 68.09 309.66 5210.63 5154.44 7786.54 7807.29 5160.38 -5835.21 0.27 -0.04 -0.29 6036054.87 653882.97 N 70.50538722 W 148.74104253 10255.25 67.97 309.43 5245.32 5189.13 7872.52 7893.27 5215.12 -5901.51 0.26 -0.13 -0.25 6036108.16 653815.51 N 70.50553662 W 148.74158521 10349.03 67.99 308.90 5280.48 5224.29 7959.45 7980.21 5270.02 -5968.92 0.52 0.02 -0.57 6036161.61 653746.94 N 70.50568647 W 148.74213695 10444.13 68.71 309.59 5315.56 5259.37 8047.83 8068 60 5325.94 -6037.37 1.01 0.76 0.73 6036216.04 653677.31 N 70.50583908 W 148.74269727 10539.08 69.35 309.99 5349.54 5293.35 8136.49 8157.26 5382.68 -6105.50 0.78 0.67 0.42 6036271.30 653607.99 N 70.50599394 W 148.74325493 10632.93 69.66 309.85 5382.40 5326.21 8224.40 8245.17 5439.10 -6172.92 0.36 0.33 -0.15 6036326.24 653539.37 N 70.50614790 W 148.74380683 10728.69 69.60 309.92 5415.73 5359.54 8314.17 8334 94 5496.66 -6241.80 0.09 -0.06 0.D7 6036382.31 653469.27 N 70.50630501 W 148.74437072 10822.41 68.86 309.83 5448.97 5392.78 8401.80 8422.57 5552.84 -6309.05 0.79 -0.79 -0.10 6036437.03 653400.83 N 70.50645833 W 148.74492123 10917.90 68.26 309.43 5483.87 5427.68 8490.68 8511.45 5609.54 -6377.51 0.74 -0.63 -0.42 6036492.23 653331.18 N 70.50661304 W 148.74548161 11013.63 67.84 309.69 5519.66 5463.47 8579.47 860024 5666.08 -6445.96 0.51 -0.44 0.27 6036547.29 653261.53 N 70.50676736 W 148.74604199 11108.15 67.46 309.90 5555.60 5499.41 8666.89 8687.66 5722.04 -6513.13 0.45 -0.40 0.22 6036601.78 653193.18 N 70.50692006 W 148.74659186 SurveyEditor Ver 3.1RT-SP3.03-HF4.00 Bld( d031rt-546) NS21\NS21\NS21\NS21 Generated 4/27/2004 2:25 PM Page 2 of 4 e e Measured Inclination I Azimuth I TVD I Sub~a TVD I Vertical I þJong Hole I NS EW I DlS I Build Rate I Walk Rate I Northing Ea.ting latitude longitude Depth Section Departure (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (degJ100 ft) (degf100 ft) (deg/100 ft) (ftUS) (ftUS) 11203.53 67.55 310.30 5592.09 5535.90 8755.01 8775.78 5778.80 -6580.53 0.40 0.09 0.42 6036657.08 653124.58 N 70.50707496 W 148.74714370 11299.82 67.72 310.32 5628.73 5572.54 8844.06 8864.83 5836.40 -6648.44 0.18 0.18 0.02 6036713.21 653055.46 N 70.50723217 W 148.74769961 11393.83 68.02 310.57 5664.15 5607.96 8931.14 8951.91 5892.90 -6714.71 0.40 0.32 0.27 6036768.26 652987.99 N 70.50738634 W 148.74824218 11488.61 68.40 310.71 5699.33 5643.14 9019.14 9039.92 5950.22 -6781.49 0.42 0.40 0.15 6036824.13 652920.00 N 70.50754277 W 148.74878894 11583.94 68.48 310.47 5734.36 5678.17 9107.79 9128.58 6007.90 -6648.82 0.25 0.08 -0.25 6036880.35 652851.45 N 70.50770019 W 148.74934016 11679.15 68.81 310.68 5769.03 5712.84 9196.46 9217.25 6065.58 -6916.17 0.40 0.35 0.22 6036936.56 652782.88 N 70.50785758 W 148.74989160 11773.94 68.85 310.21 5803.26 574707 9264.84 9305.65 6122.92 -6983.44 0.46 0.04 -0.50 6036992.44 652714.40 N 70.50801406 W 148.75044236 11868.70 69.23 310.28 5837.16 5780.97 9373.33 9394.14 6180.09 -7050.98 0.41 0.40 0.Q7 6037048.14 652645.65 N 70.50817007 W 148.75099537 11963.82 69.44 309.81 5870.73 5814.54 9462.33 9483.14 6237.35 -7119.12 0.51 0.22 -0.49 6037103.92 652576.30 N 70.50832632 W 148.75155322 12058.07 69.68 309.15 5903.64 5847.45 9550.64 9571.45 6293.50 ·7187.28 0.70 0.25 -0.70 6037158.59 652506.95 N 70.50847954 W 148.75211134 12154.03 69.73 309.30 5936.93 5880.74 9640.64 9661.45 6350.42 -7257.01 0.16 0.05 0.16 6037213.99 652436.03 N 70.50863484 W 148.75268220 12250.15 69.61 308.62 5970.32 5914.13 9730.76 9751.59 6407.09 -7327.09 0.68 -0.12 -0.71 6037269.14 652364.74 N 70.50878947 W 148.75325604 12345.85 69.49 308.20 6003.76 5947.57 9820.40 9841.26 6462.80 ·7397.35 0.43 -0.13 -0.44 6037323.32 652293.31 N 70.50894147 W 148.75383133 12439.74 69.50 308.53 6036.65 5980.46 9908.31 9929.20 6517.38 -7466.31 0.33 0.01 0.35 6037376.40 652223.20 N 70.50909040 W 148.75439591 12533.28 69.36 307.97 6069.51 6013.32 9995.85 10016.77 6571.60 -753508 0.58 -0.15 -0.60 6037429.13 652153.28 N 70.50923832 W 148.75495903 12629.54 69.19 307.60 6103.58 6047.39 10085.83 10106.80 6626.76 -7606.23 0.40 -0.18 -0.38 6037482.74 652080.96 N 70.50938882 W 148.75554163 12723.51 69.01 307.61 6137.10 6080.91 10173.54 10194.59 6680.33 -7675.78 0.19 -0.19 0.01 6037534.80 652010.29 N 70.50953497 W 148.75611109 12818.16 68.67 307.29 6171.27 6115.08 10261.74 10282.86 673401 -7745.85 0.48 -0.36 -0.34 6037586.95 651939.08 N 70.50968140 W 148.75668487 12913.46 68.52 307.07 6206.05 6149.86 10350.36 10371.59 6787.63 -7816.55 0.27 -0.16 -0.23 6037639.03 651867.26 N 70.50982768 W 148.75726371 13008. 02 68.41 307.33 6240.76 6184.57 10438.23 10459.54 6840.80 -7886.61 0.28 -0.12 0.27 6037690.69 65179607 N 70.50997276 W 148.75783739 13101.85 68.32 306.88 6275.35 6219.16 10525.35 10546.76 6893.42 -7956.17 0.46 -0.10 -0.48 6037741.80 651725.40 N 70.51011630 W 148.75840698 13197.67 68.12 306.76 6310.90 6254.71 10614.20 10635.74 6946.75 -8027.40 0.24 -0.21 -0.13 6037793.58 651653.05 N 70.51026177 W 148.75899025 13290.11 68.22 307.97 6345.28 6289 09 10699.93 10721.56 6998.83 -8095.60 1.22 0.11 1.31 6037844.17 651583.75 N 70.51040384 W 148.75954872 13385.32 68.18 307.91 6380.64 6324.45 10788.28 10809.96 7053.18 -8165.32 0.07 -004 ·0.06 6037897.01 651512.88 N 70.51055211 W 148.76011963 13479.11 68.27 308.39 6415.43 6359.24 10875.34 10897.05 7106.98 -8233.81 0.48 0.10 0.51 6037949.32 651443.26 N 70.51069888 W 148.76068053 13575.04 68.46 308.81 6450.80 6394.61 10964.49 10986.23 7162.61 -8303.50 0.45 0.20 0.44 6038003.44 651372.39 N 70.51085065 W 148.76125124 13667.99 68.52 308.84 6484.88 6428.69 11050.95 11072.70 7216.83 -8370.87 0.07 0.06 0.03 6038056.19 651303.88 N 70.51099856 W 148.76180298 13763.73 68.72 309.43 6519.78 8463.59 11140.10 11161.85 7273.10 -8440.02 0.61 0.21 0.62 6038110.96 651233.54 N 70.51115206 W 148.76236931 13860.27 68.78 309.49 6554.77 6498.58 11230.07 11251.83 7330.28 -8509.49 0.08 0.06 0.06 6038166.63 651162.86 N 70.51130806 W 148.76293824 13955.93 68.67 309.02 6589.48 6533.29 11319.21 11340.97 7386.69 -8578.51 0.47 -0.11 -0.49 6038221.53 651092.65 N 70.51146194 W 148.76350355 14051.29 68.93 309.52 6623.97 6567.78 11408.11 11429.88 7442.96 -8647.34 0.56 0.27 0.52 6038276.31 651022.63 N 70.51161546 W 148.76406727 14148.54 68.95 309.42 6658.91 6602.72 11498.86 11520.63 7500.65 -8717.40 0.10 0.02 -0.10 6038332.48 650951 .35 N70.51177284 W148.76464107 14241.54 69.11 309.30 8692.20 6636.01 11585.70 11607.47 7555.72 -8784.54 0.21 0.17 -0.13 6038386.09 650883.05 N 70.51192307 W 148.76519100 14337.11 69.32 308.97 6726.11 6669.92 11675.04 11696.82 7612.12 -8853.85 0.39 0.22 -0.35 6038440.98 650812.55 N 70.51207691 W 148.76575865 14431.78 69.63 309.39 6759.30 6703.11 11763.69 11785.48 7668.13 -8922.57 0.53 0.33 0.44 6038495.50 650742.64 N 70.51222970 W 148.76632156 14526.20 69.51 309.09 6792.26 6736.07 11852.17 11873.96 7724.10 -8991.10 0.32 -0.13 -0.32 6038549.98 650672.93 N 70.51238238 W 148.76688286 1462201 69.35 309.37 6825.93 6769.74 11941.86 11963.66 7780.83 -9060.59 0.32 -0.17 0.29 6038605.20 650602.25 N 70.51253713 W 148.76745199 14716.97 69.23 309.29 6859.51 6803.32 12030.68 12052.49 7837.13 -9129.29 0.15 -0.13 -0.08 6038660.00 650532.35 N 70.51269069 W 148.76801477 14813.17 68.93 309.27 6893.86 6837.67 12120.54 12142.35 7894.02 -9198.85 0.31 -0.31 -0.02 6038715.38 650461.59 N 70.51284587 W 148.76858451 14908.31 68.49 309.24 6928.40 6872.21 12209.18 12230.99 7950.11 -9267.49 0.46 -0.46 -0.03 6038769.98 650391.77 N 70.51299888 W 148.76914678 15004.15 68.32 309.67 6963.67 6907.48 12298.29 12320.11 8006.74 ·9336.30 0.45 -0.18 0.45 6038825.11 650321.76 N 70.51315334 W 148.76971041 15098.65 68.06 309.73 6998.78 6942.59 12386.03 12407.84 8062.78 -9403.80 0.28 -0.28 0.06 6038879.68 650253.08 N 70.51330621 W 148.77026337 15193.87 68.00 309.79 7034.41 6978.22 12474.33 12496.15 8119.26 -9471.68 0.09 -0.06 0.06 6038934.69 650184.00 N 70.51346027 W 148.77081945 15291.37 68.08 309.35 7070.87 7014.68 12564.75 12586.57 8176.86 -9541.39 0.43 0.08 -0.45 6038990.77 650113.08 N 70.51361739 W 148.77139046 15384.96 68.16 309.13 7105.75 7049.56 12651.60 12673.42 8231.80 ·9608.65 0.23 0.09 -0.24 6039044.25 650044.66 N 70.51376723 W 148.77194148 15481.23 68.21 308.26 7141.52 7085.33 12740.95 12762.80 8287.67 -9678.41 0.84 0.05 -0.90 6039098.61 649973.72 N 70.51391963 W 148.77251291 15576.00 68.09 307.71 7176.79 7120.60 12828.87 12850.76 8341.81 -9747.74 0.55 -0.13 -0.58 6039151.24 649903.25 N 70.51406728 W 148.77308083 15673.27 68.09 307.22 7213.09 7156.90 1291903 12941.00 8396.70 -9819.37 0.47 0.00 -0.50 6039204.57 649830.46 N 70.51421698 W 148.77366759 15768.12 68.06 306.71 7248.51 7192.32 13006.91 13028.99 8449.61 -9889.67 0.50 -0.03 -0.54 6039255.96 649759.04 N 70.51436127 W 148.77424350 15864.44 68.27 306.90 7284.33 7228.14 13096.19 13118.40 8503.18 -9961.26 0.28 0.22 0.20 6039307.97 649686.32 N 70.51450734 W 148.77482994 15958.61 69.06 307.21 7318.59 7262.40 13183.80 13206.12 8556.03 -10031.26 0.89 0.84 0.33 6039359.30 649615.21 N 70.51465148 W 148.77540339 16008.85 69.66 307.04 7336.30 7280.11 13230.77 13253.13 8584.41 -10068.75 1.24 1.19 -0.34 6039386.86 649577. 12 N 70.51472886 W 148.77571048 16105.83 69.71 307.21 7369.97 7313.78 13321.61 13344.08 8639.30 -10141.26 0.17 0.05 0.18 6039440.18 649503.45 N 70.51487855 W 148.77630453 16202.91 69.81 306.99 7403.56 7347.37 13412.59 13435.17 8694.25 -10213.91 0.24 0.10 -0.23 6039493.55 649429.64 N 70.51502838 W 148.77689968 16299.09 69.95 307.13 7436.64 7380.45 13502.79 13525.48 8748.67 -10285.98 0.20 0.15 0.15 6039546.41 649356.43 N 70.51517679 W 148.77749009 16396.42 70.02 306.75 7469.95 7413.76 13594.12 13616.93 8803.63 -10359.07 0.37 0.07 -0.39 6039599.78 649282.17 N 70.51532666 W 148.77808891 16493.25 69.90 306.92 7503.14 7446.95 13684.97 13707.90 8858.17 -10431.88 0.21 -0.12 0.18 6039652.73 649208.22 N 70.51547536 W 148.77868538 16589.59 69.56 306.85 7536.51 7480.32 13775.22 13798.27 8912.41 -10504.16 0.36 -0.35 -0.07 6039705.41 649134.79 N 70.51562327 W 148.77927759 16686.85 69.30 307.04 7570.68 7514.49 13866.16 13889.33 8967.14 -10576.94 0.32 -0.27 0.20 6039758.56 649060.86 N 70.51577250 W 148.77987382 16782.83 68.95 306.85 7604.88 7548.69 13955.72 13979.01 9021.04 -10648.61 0.41 -0.36 -0.20 6039810.90 648988.05 N 70.51591948 W 148.78046104 16879.40 68.64 306.78 7639.81 7583.62 14045.63 14069.04 9074.99 -10720.69 0.33 -0.32 -0.Q7 6039863.28 648914.83 N 70.51606658 W 148.78105156 16977.34 68.37 307.22 7675.70 7619.51 14136.64 14160.17 9129.84 -10793.47 0.50 -0.28 0.45 6039916.55 648840.90 N 70.51621611 W 148.78164785 17072.94 68.36 306.65 7710.95 7654.76 14225.39 14249.03 9183.23 -10864.50 0.55 -001 -0.60 6039968.40 648768.74 N 70.51636171 W 148.78222982 17169.61 68.29 306.48 7746.65 7690.46 14315.08 14338.87 9236.75 -10936.65 0.18 -0.07 -0.18 6040020.35 648695.46 N 70.51650762 W 148.78282100 17266.27 68.23 306.39 7782.46 7726.27 14404.70 14428.65 9290.08 -11008.88 0.11 -0.06 -0.09 6040072.11 648622.10 N 70.51665301 W 148.78341284 17362.86 68.31 306.93 7818.22 7762 03 14494.29 14518.38 9343.65 -11080.86 0.53 0.08 0.56 6040124.12 648548.99 N 70.51679907 W 148.78400259 17459.64 68.30 306.26 7853.99 7797.80 14584.06 14608.30 9397.26 -11153.06 0.64 -0.01 -0.69 6040176.16 648475.67 N 70.51694523 W 148.78459416 17556.20 68.34 306.48 7889.66 7833.47 14673.63 14698.03 9450.47 -11225.31 0.22 0.04 0.23 6040227.80 648402.30 N 70.51709029 W 148.78518615 17652.26 68.36 306.66 7925.10 7868.91 14762.76 14787.31 9503.66 -11297.02 0.18 0.02 0.19 6040279.44 648329.47 N 70.51723532 W 148.78577370 17749.04 68.39 306.53 7960.77 7904.58 14852.58 14877.28 9557.30 -11369.25 0.13 0.03 -0.13 6040331.50 648256.10 N 70.51738154 W 148.78636558 17845.75 68.38 306.96 7996.40 7940.21 14942.36 14967.19 9611.09 -11441.29 0.41 -0.01 0.44 6040383.73 648182.92 N 70.51752818 W 148.78695593 17942.70 68.30 306.82 8032.18 7975.99 15032.34 15057.30 9665.17 -11513.36 0.16 -0.08 -0.14 6040436.25 648109.72 N 70.51767564 W 148.78754644 SurveyEdìtor Ver 3.1 RT-SP3.03-HF4.00 Bld( d031rt-546 ) NS21\NS21\NS21\NS21 Generated 4/27/2004 2:25 PM Page 3 of 4 · e e Measured Inclination I Azimuth I TVD I Sub-Sea TVD I Vertical I Along Hole I NS EW I DLS I Build Rate I Walk Rate I Northing Easting Latitude Longitude Depth Section Departure (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg/100ft) (deg/100ft) (deg/1ooft) (ftUS) (ftUS) 18039.18 68.36 306.20 8067.81 8011.62 15121.85 15146.96 9718.52 -11585.42 0.60 0.06 -0.64 6040488.03 648036.53 N 70.51782106 W 148.78813697 18135.48 67.98 306.77 8103.62 8047.43 15211.09 15236.35 9771.67 -1165730 0.68 ·0.39 0.59 6040539.62 647963.53 N 70.51796597 W 148.78872595 18232.20 67.01 306.87 8140.64 8064.45 15300.32 15325.70 9825.22 -11728.83 1.01 -1.00 0.10 6040591.62 647890.88 N 70.51811195 W 148.78931210 18328.99 65.96 307.09 8179.25 8123.06 15388.96 15414.46 9878.61 -11799.73 1.10 -1.08 0.23 6040643.46 647818.85 N 70.51825749 W 148.78989311 18425.49 64.77 307.96 8219.48 8163.29 15476.60 1550217 9932.03 -11869.29 1.48 -1.23 0.90 6040695.38 647748.16 N 70.51840313 W 148.79046322 18522.33 63.24 308.30 8261.92 8205.73 15563.60 15589.21 9985.77 -11937.76 1.61 -1.58 0.35 6040747.63 647678.56 N 70.51854965 W 148.79102435 18619.42 61.68 308.87 8306.81 8250.62 15649.66 15675.30 10039.46 -12005.05 1.69 -1.61 0.59 6040799.85 647610.13 N 70.51869602 W 148.79157587 18716.29 60.48 308.94 8353.66 8297.47 15734.44 15760.09 10092.71 -12071.03 1.24 -1.24 0.07 6040851.67 647543.02 N 70.51884120 W 148.79211665 18812.79 58.82 309.60 8402.41 8346.22 15817.71 15843.36 10145.42 -12135.50 1.82 -1.72 0.68 6040902.97 647477.44 N 70.51898489 W 148.79264506 18909.73 57.17 309.94 8453.79 8397.60 15899.91 15925.56 10198.00 -12198.69 1.73 -1.70 0.35 6040954.18 647413.15 N 7051912827 W 14879316296 19006.33 55.54 309.73 8507.31 8451.12 15980.32 16005.98 10249.51 -12260.44 1.70 -1.69 -0.22 6041004.35 647350.31 N 70.51926872 W 14879366910 19103.23 53.84 309.83 8563.32 8507.13 16059.40 16085.05 10300.11 -12321.20 1.76 -1.75 0.10 6041053.62 647288.47 N 7051940665 W 14879416720 19200.70 52.13 310.23 8621.99 8565.80 16137.22 16162.87 10350.16 -12380.80 1.78 -1.75 0.41 6041102.38 647227.82 N 7051954312 W 148.79465567 19295.90 50.43 310.67 8681.54 8625.35 16211.49 16237.14 10398.34 -12437.32 1.82 -1.79 0.46 6041149.34 647170.28 N 70.51967450 W 148.79511901 19393.61 49.32 310.30 8744.51 8688.32 1628620 16311.86 10446.85 -12494.14 1.17 -1.14 -0.38 6041196.61 647112.43 N 70.51980675 W 148.79558480 19490.51 47.94 309.65 8808.55 8752.36 1635891 16384.57 10493.57 -12549.86 1.51 -1.42 -0.67 6041242.12 647055.72 N 70.51993413 W 148.79604158 19585.44 46.53 309.19 8873.01 8816.82 1642860 16454.26 10537.83 -12603.70 1.53 -1.49 -0.48 6041285.20 647000.95 N 70.52005479 W 148.79648287 19682.50 44.94 308.50 8940.75 8884.56 16498.09 16523.77 10581.43 -12657.83 1.72 -1.64 -0.71 6041327.62 646945.90 N 70.52017364 W 148.79692657 19779.14 43.38 307.89 9010.08 8953.89 16565.39 16591.09 10623.06 -12710.73 1.67 -1.61 -0.63 6041368.11 646892.12 N 70.52028713 W 148.79736024 19876.39 41.79 306.99 9081.68 9025.49 16631.13 16656.90 10663.07 -12762.98 1.75 -1.63 -0.93 6041406.98 646839.03 N 70.52039619 W 148.79778846 19973.03 40.22 306.17 9154.61 9098.42 16694.43 16720.30 10700.86 -12813.89 1.72 -1.62 -0.85 6041443.67 646787.32 N 70.52049919 W 148.79820575 20070.65 38.43 305.73 9230.12 9173.93 16756.15 16782.16 10737.18 -12863.96 1.86 -1.83 -0.45 6041478.90 646736.48 N 70.52059818 W 148.79861619 20168.35 37.05 305.61 9307.38 9251.19 16815.79 16841.96 10772.05 -12912.54 1.41 -1.41 -0.12 6041512.72 646687.17 N 70.52069321 W 148.79901436 20223.62 36.98 304.75 9351.51 9295.32 16848.95 16875.23 10791.22 -12939.74 0.95 -0.13 -1.56 6041531.30 646659.57 N 70.52074545 W 148.79923725 20319.46 35.48 305.50 9428.82 9372.63 16905.40 16931.88 10823.81 -12986.07 1.63 -1.57 0.78 6041562.87 646612.55 N 70.52083424 W 14879961700 20418.79 33.80 304.34 9510.54 9454.35 16961.65 16988.33 10856.13 -13032.35 1.82 -1.69 -1.17 6041594.20 646565.59 N 70.52092233 W 148.79999635 2051467 32.39 303.90 9590.86 9534.67 17013.74 17040.69 10885.50 -13075.69 1.49 -1.47 -0.46 6041622.63 646521.63 N 70.52100236 W 14880035155 2061136 30.93 306.50 9673.16 9616.97 17064.31 17091.43 10914.73 -13117.17 2.07 -1.51 2.69 6041650.95 646479.54 N 70.52108201 W 14880069149 20708.11 29.58 309.58 9756.74 9700.55 17113.01 17140.17 10944.74 -13155.56 2.13 -1.40 3.18 6041680.13 646440.51 N 70.52116380 W 148.80100624 20805.28 28.57 311.15 9841.66 9785.47 17160.23 17187.38 10975.31 -13191.54 1.30 -1.04 1.62 6041709.92 646403.88 N 70.52124714 W 148.80130125 20901.53 28.62 311.43 9926.17 9869.98 17206.28 17233.45 11005.71 -13226.16 0.15 0.05 0.29 6041739.56 646368.63 N 70.52133002 W 148.80158505 20999.10 27.96 311.19 10012.09 9955.90 1725251 17279.69 11036.23 -13260.89 0.69 -0.68 -0.25 6041769.33 646333.25 N 70.52141324 W 148.80186984 21094.19 25.79 310.29 10096.90 10040.71 17295.48 17322.67 11064.30 -13293.45 2.32 ·2.28 -0.95 6041796.68 646300.10 N 70.52148974 W 148.80213678 21190.56 23.76 308.78 10184.40 10128.21 17335.86 17363.05 11090.01 -1332458 2.21 -2.11 -1.57 6041821.73 646268.42 N 70.52155985 W 148.80239199 21289.70 22.14 308.21 10275.69 10219.50 17374.51 17401.71 11114.08 -13354.83 1.65 -1.63 -0.57 6041845.13 646237.67 N 70.52162545 W 148.80263999 21383.40 20.50 307.53 10362.98 10306.79 17408.55 1743577 11135.00 -13381.72 1.77 -1.75 -0.73 6041865.47 646210.34 N 70.52168246 W 148.80286041 21480.41 18.64 306.92 10454.38 10398.19 17441.01 1746827 11154.66 -13407.58 1.93 -1.92 -0.63 6041884.57 646184.06 N 70.52173605 W 148.80307246 21578.44 17.30 307.31 10547.62 10491.43 17471.22 17498.51 11172.91 -13431.70 1.37 -1.37 0.40 6041902.29 646159.55 N 70.52178577 W 148.80327018 21674.11 16.09 307.41 10639.26 10583.07 17498.67 17525.99 11189.58 -13453.55 1.27 -1.26 0.10 6041918.49 646137.35 N 70.52183123 W 148.80344927 21772.08 14.72 307.51 10733.71 10677.52 17524.68 17552.02 11205.41 -13474.21 1.40 -1.40 0.10 6041933.87 646116.36 N 70.52187436 W 148.80361862 21868.19 13.70 307.05 10826.88 10770.69 17548.24 17575.61 11219.70 -13492.98 107 -1.06 -0.48 6041947.76 646097.29 N 70.52191331 W 148.80377249 21897.40 13.47 307.07 10855.27 10799.08 17555.10 17582.47 11223.84 -13498.45 0.79 -0.79 0.07 6041951.77 646091.73 N 70.52192458 W 148.80381738 22018.01 15.34 303.45 10972.08 10915.89 17584.98 17612.47 11241.10 -13522.97 1.72 1.55 -3.00 6041968.50 646066.84 N 70.52197162 W 148.80401839 22112.72 15.97 302.00 11063.28 11007.09 17610.34 17638.02 11254.91 -13544.48 0.78 0.67 -1.53 6041981.85 646045.05 N 70.52200924 W 148.80419463 22169.40 14.94 306.21 11117.91 11061.72 17625 36 17653.12 11263.36 -13556.98 2.69 -1.82 7.43 6041990.02 646032.36 N 70.52203226 W 148.80429715 22261 00 14.94 306.21 11206.42 11150.23 17648.92 17676.73 11277.31 -13576.04 0.00 0.00 0.00 6042003.56 646013.02 N 70.52207028 W 148.80445335 LeQal Description: NorthfnQ IV) IftUS1 EastinQ (XI fftUS1 Surface: 1249 FSL 646 FEL S11 T13N R13E UM 6031021.48 659827.32 BHL: 1953 FSL 3653 FEL S33 T14N R13E UM 6042003.56 646013.02 SurveyEditor Ver 3.1 RT-SP3.03-HF4.00 Bld( do31rt-546 ) NS21\NS21\NS21\NS21 Generated 4/27/2004 2:25 PM Page 4 of 4 " gy~ ~dat' c: JIL a",,_ GyrOdata IncorpOrated 1682 W Sam Houston Pkwy. N. HOuston, Texas 77043 713/461-3146 Fax: 713/461-0920 the /))01\', \Ace- S~r~~} SURVEY REPORT SP EXPLORATION NORTHSTAR ISLAND WEll #NS-21 AK0604G_509 JUNE 5, 2004 (C(Q)~11 ~('/ith . JJ~J. 1> Jw..- ¡o~r wk.(,,~~( Sð CA~ý(.ðuL ;) 01-- J(g )J;ùv\ \ Jh ~ A Gyrodata Directional Survey for BP EXPLORATION (ALASKA) INe. Location: NORTH STAR, Lease: NORTHSTAR ISLAND Well: NS-21, . Job Number: AK0604G 509B Run Date: 6/512004 3 :42:26 PM Surveyor: JAMIE MCCRIMMON Calculation Method: MINIMUM CUR VA TURE Survey Latitude: 70.491296 deg. N Longitude: 148.693311 deg. W Azimuth Correction: Gyro: Bearings are Relative to True North . Proposed Well Direction: 309.860 deg Vertical Section Calculated from Wen Head Location Closure Calculated from Wen Head Location Horizontal Coordinates Calculated from Wen Head Location A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTH STAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DEPTH feet deg. deg. DOGLEG SEVERITY deg./ 25 ft. VERTICAL CLOSURE DEPTH DIST. AZIMUTH feet feet deg. HORIZONTAL COORDINATES feet 0.00 0.00 0.00 0.00 0.00 0.0 0.0 . O.OON 0.00 E ---------------------------------------------------------------------------------------------------------------------------------------------- RATE GYROSCOPIC CONTINUOUS MUL TISHOT RUN IN 4 Yi" TUBING MEASURED DEPTHS ARE REFERENCED TO THE ORIGINAL RKB OF 36.4 FEET ----------------------------------------------------------------------------------------------------------------------------------------------- 100.00 1.43 259.27 0.36 99.99 1.2 259.3 0.23 S 1.22W 200.00 1.79 278.78 0.16 199.95 4.0 266.8 0.22 S 3.99W 300.00 1.96 296.11 0.15 299.90 7.1 276.2 O.77N 7.07W 400.00 2.03 310.52 0.13 399.84 10.3 285.0 2.67N 9.95W 500.00 2.36 331.47 0.22 499.77 13.5 294.6 5.63 N 12.28W 600.00 3.83 336.77 0.37 599.62 18.0 305.8 10.51 N 14.58W 700.00 4.72 337.50 0.22 699.34 24.6 314.8 17.38 N 17.4 7W 800.00 5.46 335.50 0.19 798.94 33.1 320.5 25.51 N 21.02W . 900.00 7.79 324.83 0.66 898.27 44.4 322.8 35.38 N 26.90W 1000.00 10.20 320.99 0.62 997.04 60.1 322.7 47.81 N 36.38W 1100.00 12.54 319.66 0.59 1095.07 79.8 322.1 62.97 N 48.98W 1200.00 14.60 322.63 0.54 1192.27 103.2 321.9 81.26 N 63.67W 1225.00 15.12 323.37 0.55 1216.43 109.6 322.0 86.39 N 67.53W 1250.00 15.40 324.54 0.42 1240.55 116.2 322.1 91.71 N 71.40 W 1275.00 15.65 325.45 0.35 1264.64 122.9 322.3 97.19 N 75.23W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTH STAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg.l feet feet deg. feet 25 ft. . 1300.00 15.97 326.04 0.35 1288.69 129.7 322.4 102.82 N 79.07W 1325.00 16.49 326.42 0.53 1312.70 136.7 322.6 108.63 N 82.95W 1350.00 17.25 326.41 0.76 1336.62 143.9 322.8 114.67 N 86.97W 1375.00 18.14 325.96 0.90 1360.44 151.5 323.0 120.99 N 91.20W 1400.00 19.13 325.21 1.01 1384.13 159.5 323.1 127.58 N 95.71W 1425.00 20.11 324.41 1.02 1407.67 167.9 323.2 134.43 N 100.55W 1450.00 20.85 323.83 0.76 1431.09 176.6 323.3 141.52 N 105.68W 1475.00 21.51 323.32 0.68 1454.40 185.7 323.3 148.79 N 111.04W 1500.00 22.07 322.89 0.59 1477.62 194.9 323.3 156.21 N 116.61W 1525.00 22.48 322.59 0.42 1500.75 204.4 323.2 163.75 N 122.35W 1550.00 22.86 322.31 0.40 1523.82 214.0 323.2 171.39 N 128.22W 1575.00 23.12 322.13 0.27 1546.84 223.8 323.2 179.11 N 134.20W 1600.00 23.49 321.85 0.38 1569.80 233.7 323.1 186.90 N 140.29W . 1625.00 24.05 321.42 0.59 1592.68 243.8 323.0 194.80 N 146.55W 1650.00 24.63 321.02 0.61 1615.45 254.1 323.0 202.83 N 153.00W 1675.00 25.31 320.49 0.72 1638.12 264.6 322.9 211.01 N 159.68W 1700.00 25.87 320.03 0.59 1660.66 275.4 322.8 219.31 N 166.58W 1725.00 26.44 319.63 0.60 1683.10 286.4 322.7 227.73 N 173.69W 1750.00 27.12 319.23 0.70 1705.42 297.7 322.5 236.29 N 181.02W 1775.00 27.82 318.99 0.71 1727.60 309.2 322.4 245.01 N 188.57W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 1800.00 28.82 318.83 1.00 1749.61 321.0 322.3 253.95 N 196.37W 1825.00 29.74 318.83 0.92 1771.41 333.2 322.2 263.15 N 204.42W 1850.00 30.51 319.00 0.77 1793.04 345.7 322.0 272.61 N 212.66W 1875.00 31.11 319.19 0.61 1814.51 358.5 321.9 282.28 N 221.05W 1900.00 31.33 319.23 0.22 1835.89 371.5 321.8 292.10 N 229.51W 1925.00 31.35 319.27 0.03 1857.24 384.5 321.8 301.95 N 238.00W 1950.00 31.25 319.35 0.11 1878.60 397.4 321.7 311.79 N 246.47W 1975.00 31.25 319.40 0.03 1899.97 410.4 321.6 321.64 N 254.91 W 2000.00 31.38 319.42 0.12 1921.33 423.4 321.5 331.51N 263.37W 2025.00 31.65 319.37 0.27 1942.64 436.4 321.5 341.43 N 271.87W 2050.00 32.30 319.19 0.65 1963.85 449.7 321.4 351.46 N 280.51W 2075.00 33.12 318.85 0.85 1984.89 463.2 321.3 361.66 N 289.37W 2100.00 33.87 318.43 0.78 2005.74 477.0 321.3 372.01 N 298.49W . 2125.00 34.56 317.97 0.74 2026.41 491.0 321.2 382.49 N 307.86W 2150.00 35.23 317.49 0.73 2046.91 505.3 321.1 393.07 N 317.48W 2175.00 35.95 316.95 0.79 2067.24 519.8 321.0 403.75 N 327.36W 2200.00 36.55 316.48 0.66 2087.40 534.5 320.8 414.51 N 337.49W 2225.00 37.05 315.98 0.58 2107.42 549.5 320.7 425.33 N 347.85W 2250.00 37.64 315.29 0.73 2127.30 564.6 320.6 436.17 N 358.46W 2275.00 38.49 314.33 1.04 2146.98 579.9 320.4 447.03 N 369.39W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 2300.00 39.43 313.41 1.10 2166.42 595.5 320.3 457.92 N 380.73W 2325.00 40.25 312.92 0.88 2185.62 611.4 320.1 468.88 N 392.41 W 2350.00 41.21 312.67 0.98 2204.56 627.6 319.9 479.96 N 404.38W 2375.00 42.22 312.57 1.01 2223.22 644.1 319.7 491.22 N 416.62W 2400.00 42.90 312.63 0.68 2241.64 660.9 319.5 502.67 N 429.07W 2425.00 43.33 312.69 0.43 2259.88 677.9 319.3 514.25 N 441.63W 2450.00 43.74 312.75 0.42 2278.01 695.0 319.2 525.93 N 454.29W 2475.00 44.37 312.82 0.63 2295.97 712.2 319.0 537.74 N 467.04W 2500.00 45.09 312.85 0.72 2313.74 729.7 318.9 549.70 N 479.95W 2525.00 45.79 312.85 0.71 2331.28 747.5 318.7 561.82 N 493.00W 2550.00 46.46 312.82 0.67 2348.60 765.4 318.6 574.07 N 506.22W 2575.00 47.14 312.78 0.68 2365.72 783.5 318.5 586.45 N 519.59W 2600.00 47.86 312.75 0.71 2382.61 801.9 318.3 598.96 N 533.13W . 2625.00 48.75 312.85 0.89 2399.23 820.4 318.2 611.65 N 546.82W 2650.00 49.76 313.02 1.02 2415.55 839.3 318.1 624.55 N 560.69W 2675.00 50.58 313.09 0.82 2431.56 858.4 318.0 637.65 N 574.72W 2700.00 51.45 313.05 0.88 2447.29 877.8 317.9 650.92 N 588.91 W 2725.00 52.31 312.93 0.86 2462.72 897.4 317.8 664.34 N 603.30W 2750.00 53.15 312.78 0.84 2477.86 917.2 317.7 677.87 N 617.88W 2775.00 54.08 312.57 0.95 2492.69 937.3 317.5 691.51 N 632.68W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 2800.00 54.98 312.38 0.91 2507.20 957.5 317.4 705.26 N 647.70W 2825.00 55.99 312.19 1.03 2521.37 978.1 317.3 719.12N 662.94W 2850.00 56.90 312.06 0.92 2535.18 998.8 317.2 733.09 N 678.39W 2875.00 57.47 311.92 0.58 2548.73 1019.7 317.1 747.15 N 694.01 W 2900.00 58.12 311.57 0.72 2562.06 1040.8 317.0 761.23 N 709.79W 2925.00 58.98 311.00 0.98 2575.10 1062.0 316.9 775.30 N 725.82W 2950.00 59.83 310.49 0.96 2587.82 1083.4 316.8 789.35 N 742.12W 2975.00 60.4 7 310.21 0.68 2600.27 1105.0 316.6 803.39 N 758.64W 3000.00 60.92 310.04 0.47 2612.50 1126.6 316.5 817.44 N 775.31W 3025.00 61.45 309.82 0.57 2624.55 1148.4 316.4 831.50 N 792.11W 3050.00 62.10 309.55 0.69 2636.37 1170.3 316.3 845.56 N 809.06W 3075.00 62.99 309.23 0.93 2647.90 1192.3 316.1 859.64 N 826.21 W 3100.00 63.98 308.91 1.03 2659.06 1214.5 316.0 873.74 N 843.58W . 3125.00 64.90 308.65 0.96 2669.85 1236.9 315.9 887.86 N 861.16W 3150.00 65.67 308.45 0.79 2680.30 1259.4 315.7 902.02 N 878.92W 3175.00 66.19 308.39 0.52 2690.50 1282.1 315.6 916.20 N 896.80W 3200.00 66.78 308.36 0.59 2700.47 1304.8 315.5 930.43 N 914.78W 3225.00 67.26 308.38 0.48 2710.23 1327.6 315.4 944.72 N 932.82W 3250.00 67.54 308.38 0.27 2719.84 1350.6 315.2 959.05 N 950.91 W 3275.00 67.69 308.42 0.16 2729.36 1373.5 315.1 973.40 N 969.03W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 3300.00 67.56 308.57 0.20 2738.88 1396.5 315.0 987.80 N 987.12W 3325.00 66.93 308.92 0.70 2748.55 1419.4 314.9 1002.22 N 1005. lOW 3350.00 66.14 309.32 0.87 2758.50 1442.2 314.8 1016.69 N 1022.89W 3375.00 65.65 309.59 0.55 2768.71 1464.9 314.7 1031.20 N 1040.51 W 3400.00 65.30 309.82 0.41 2779.09 1487.6 314.7 1045.73 N 1058.01 W 3425.00 65.18 309.96 0.17 2789.56 1510.2 314.6 1060.28 N 1075.43W 3450.00 65.34 309.99 0.16 2800.02 1532.8 314.5 1074.87 N 1092.83W 3475.00 65.79 310.11 0.46 2810.36 1555.5 314.5 1089.52 N 1110.25W 3500.00 66.60 310.39 0.85 2820.45 1578.4 314.4 1104.29 N 1127.71W 3525.00 67.29 310.60 0.72 2830.24 1601.3 314.3 1119.23 N 1145.21W 3550.00 67.68 310.81 0.43 2839.82 1624.4 314.3 1134.29 N 1162.71W 3575.00 67.97 311.03 0.36 2849.25 1647.5 3 ]4.2 1149.46 N 1180.21W 3600.00 68.39 311.31 0.49 2858.55 ]670.6 3]4.2 1164.74 N 1197.68W . 3625.00 68.98 311.71 0.70 2867.63 1693.9 314.2 1180.17N 1215.11W 3650.00 69.58 312.02 0.66 2876.48 1717.3 314.1 1195.78 N 1232.53W 3675.00 70.07 312.22 0.52 2885.10 1740.7 314.1 1211.52 N 1249.93W 3700.00 70.37 312.33 0.33 2893.56 1764.2 314.1 1227.34 N 1267.34W 3725.00 70.37 312.52 0.17 2901.96 1787.8 314.1 1243.23 N 1284.72W 3750.00 69.86 312.93 0.64 2910.46 1811.3 314.0 1259.18 N 1301.99W 3775.00 68.90 313.39 1.05 2919.27 1834.7 314.0 1275.18 N 1319.06W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHST AR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 3800.00 67.93 313.75 1.03 2928.46 1857.9 314.0 1291.20 N 1335.90W 3825.00 67.57 313.88 0.37 2937.93 1881.1 314.0 1307.22 N 1352.60W 3850.00 67.67 313.89 0.10 2947.45 1904.2 314.0 1323.25 N 1369.26W 3875.00 67.89 313.90 0.22 2956.90 1927.3 314.0 1339.29 N 1385.94W 3900.00 68.16 313.88 0.27 2966.25 1950.5 314.0 1355.37 N 1402.65W 3925.00 68.62 313.77 0.47 2975.46 1973.7 314.0 1371.46 N 1419.42W 3950.00 69.11 313.63 0.51 2984.48 1997.1 314.0 1387.57 N 1436.28W 3975.00 69.44 313.56 0.34 2993.33 2020.4 314.0 1403.69 N 1453.21 W 4000.00 69.71 313.50 0.27 3002.05 2043.9 314.0 1419.83 N 1470.20W 4025.00 69.96 313.43 0.26 3010.67 2067.3 314.0 1435.97 N 1487.23W 4050.00 70.19 313.36 0.24 3019.19 2090.8 314.0 1452.12 N 1504.31W 4075.00 70.41 313.35 0.22 3027.62 2114.4 314.0 1468.28 N 1521.42W 4100.00 70.64 313.37 0.23 3035.95 2137.9 314.0 1484.46 N 1538.56W . 4125.00 70.87 313.38 0.23 3044.19 2161.5 314.0 1500.67 N 1555.72W 4150.00 71.10 313.37 0.23 3052.34 2185.2 314.0 1516.90 N 1572.90W 4175.00 71.28 313 .28 0.19 3060.40 2208.8 314.0 1533.14 N 1590.11W 4200.00 71.33 313.02 0.26 3068.41 2232.5 313.9 1549.33 N 1607.39W 4225.00 71.25 312.61 0.39 3076.43 2256.2 313.9 1565.43 N 1624.76W 4250.00 71.14 312.25 0.36 3084.49 2279.8 313.9 1581.39 N 1642.23W 4275.00 71.03 312.10 0.18 3092.59 2303.5 313.9 1597.27 N 1659.75W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-2l, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 4300.00 70.80 312.08 0.24 3100.77 2327.1 313.9 1613.11 N 1677.29W 4325.00 70.55 312.13 0.25 3109.04 2350.7 313.9 1628.93 N 1694.79W 4350.00 70.22 312.20 0.34 3117.43 2374.2 313.8 1644.73 N 1712.24W 4375.00 69.88 312.27 0.34 3125.96 2397.7 313.8 1660.53 N 1729.64W 4400.00 69.67 312.33 0.22 3134.60 2421.2 313.8 1676.32 N 1746.99W 4425.00 69.58 312.37 0.10 3143.31 2444.6 313.8 1692.11 N 1764.31W 4450.00 69.54 312.42 0.06 3152.04 2468.0 313.8 1707.90 N 1781.61W 4475.00 69.37 312.51 0.18 3160.82 2491.4 313.8 1723.71 N 1798.88W 4500.00 69.18 312.63 0.22 3169.66 2514.8 313.8 1739.52 N 1816.lOW 4525.00 69.06 312.72 0.15 3178.57 2538.1 313.8 1755.36 N 1833.27W 4550.00 69.07 312.78 0.05 3187.50 2561.5 313.7 1771.21 N 1850.42W 4575.00 69.14 312.81 0.08 3196.42 2584.8 313.7 1787.08 N 1867.56W 4600.00 68.93 312.83 0.22 3205.36 2608.2 313.7 1802.94 N 1884.68W . 4625.00 68.39 312.84 0.53 3214.46 2631.5 313.7 1818.77 N 1901.76W 4650.00 68.10 312.83 0.29 3223.73 2654.7 313.7 1834.56 N 1918.79W 4675.00 68.24 312.84 0.13 3233.02 2677.9 313.7 1850.34 N 1935.81 W 4700.00 68.49 312.84 0.25 3242.24 2701.1 313.7 1866.14 N 1952.85W 4725.00 68.71 312.85 0.22 3251.36 2724.4 313.7 1881.97 N 1969.91W 4750.00 68.83 312.88 0.12 3260.41 2747.7 313.7 1897.82 N 1986.99W 4775.00 68.90 312.94 0.09 3269.43 2771.0 313.7 1913.70 N 2004.07W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg.l feet feet deg. feet 25 ft. . 4800.00 69.06 312.97 0.16 3278.39 2794.4 313.7 1929.60 N 2021.15W 4825.00 69.26 312.97 0.20 3287.29 2817.7 313.7 1945.52 N 2038.25W 4850.00 69.29 312.95 0.03 3296.13 2841.1 313.7 1961.46 N 2055.36W 4875.00 68.81 312.87 0.48 3305.07 2864.4 313.7 1977.35 N 2072.46W 4900.00 68.14 312.82 0.67 3314.25 2887.7 313.6 1993.17 N 2089.51 W 4925.00 67.89 312.80 0.24 3323.61 2910.9 313.6 2008.92 N 2106.52W 4950.00 67.92 312.78 0.04 3333.01 2934.0 313.6 2024.66 N 2123.52W 4975.00 67.99 312.74 0.08 3342.39 2957.2 313.6 2040.39 N 2140.53W 5000.00 68.03 312.68 0.06 3351. 75 2980.4 313.6 2056.11 N 2157.57W 5025.00 67.99 312.58 0.10 3361.11 3003.6 313.6 2071.81 N 2174.62W 5050.00 68.06 312.47 0.12 3370.47 3026.7 313.6 2087.48 N 2191.71 W 5075.00 68.24 312.40 0.19 3379.77 3049.9 313.6 2103.14 N 2208.83W 5100.00 68.47 312.30 0.24 3388.99 3073.2 313.6 2118.79 N 2226.01W . 5125.00 68.68 312.19 0.24 3398.12 3096.4 313.6 2134.44 N 2243.24 W 5150.00 68.88 312.04 0.24 3407.17 3119.7 313.6 2150.07 N 2260.52W 5175.00 69.09 311.96 0.23 3416.14 3143.1 313.6 2165.68 N 2277.87W 5200.00 69.22 311.86 0.16 3425.03 3166.4 313.5 2181.29 N 2295.25W 5225.00 69.27 311. 78 0.09 3433.89 3189.8 313.5 2196.88 N 2312.68W 5250.00 69.30 311.72 0.06 3442.73 3213.2 313.5 2212.45 N 2330.12W 5275.00 69.27 311.65 0.08 3451.57 3236.5 313.5 2228.00 N 2347.59W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 5300.00 69.26 311.58 0.06 3460.43 3259.9 313.5 2243.53 N 2365.07W 5325.00 69.23 311.52 0.07 3469.28 3283.3 313.5 2259.03 N 2382.56W 5350.00 69.17 311.45 0.09 3478.16 3306.6 313.5 2274.51 N 2400.07W 5375.00 69.00 311.37 0.18 3487.09 3330.0 313.4 2289.96 N 2417.58W 5400.00 68.91 311.31 0.11 3496.06 3353.3 313.4 2305.37 N 2435.10W 5425.00 68.87 311.25 0.07 3505.07 3376.6 313.4 2320.76 N 2452.63W 5450.00 68.80 311.14 0.13 3514.10 3399.9 313.4 2336.12 N 2470.17W 5475.00 68.81 3 11. 04 0.09 3523.14 3423.2 313.4 2351.44 N 2487.74W 5500.00 68.84 310.97 0.07 3532.17 3446.5 313.4 2366.73 N 250533W 5525.00 68.93 310.92 0.10 3541.17 3469.8 313.4 2382.02 N 2522.94W 5550.00 69.05 310.87 0.13 3550.14 3493.1 313.3 2397.30 N 2540.58W 5575.00 69.16 310.81 0.12 3559.05 3516.4 313.3 2412.57 N 2558.25W 5600.00 69.33 310.78 0.18 3567.91 3539.8 313.3 2427.85 N 2575.95W . 5625.00 69.41 310.70 0.11 3576.72 3563.1 313.3 2443.11 N 2593.68W 5650.00 69.40 310.55 0.14 3585.52 3586.5 313.3 2458.35 N 2611.44W 5675.00 69.41 310.37 0.16 3594.31 3609.9 313.3 2473.54 N 2629.24W 5700.00 69.37 310.16 0.21 3603.11 3633.3 313.2 2488.66 N 2647.1 OW 5725.00 69.28 309.93 0.24 3611.94 3656.6 313.2 2503.71 N 2665.01 W 5750.00 69.14 309.68 0.27 3620.81 3679.9 313.2 2518.67 N 2682.96W 5775.00 69.12 309.48 0.19 3629.72 3703.3 313.2 2533.55 N 2700.96W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 5800.00 69.15 309.32 0.15 3638.63 3726.6 313.1 2548.38 N 2719.02W 5825.00 69.18 309.18 0.13 3647.52 3749.9 313.1 2563.16 N 2737.11W 5850.00 69.14 309.00 0.17 3656.41 3773.2 313.1 2577.89 N 2755.24W 5875.00 69.18 308.82 0.17 3665.31 3796.5 313.1 2592.57 N 2773.43W 5900.00 69.19 308.62 0.19 3674.19 3819.8 313.0 2607.19 N 2791.66W 5925.00 69.17 308.40 0.20 3683.07 3843.1 313.0 2621.74 N 2809.94W 5950.00 69.21 308.20 0.19 3691.96 3866.4 313.0 2636.22 N 2828.28W 5975.00 69.17 308.00 0.19 3700.84 3889.7 313.0 2650.64 N 2846.67W 6000.00 69.14 307.84 0.15 3709.73 3912.9 312.9 2665.00 N 2865.10W 6025.00 69.02 307.63 0.23 3718.66 3936.2 312.9 2679.29 N 2883.57W 6050.00 68.79 307.34 0.35 3727.65 3959.4 312.9 2693.49 N 2902.08W 6075.00 68.71 307.11 0.23 3736.71 3982.6 312.8 2707.58 N 2920.64W 6100.00 68.86 306.99 0.18 3745.76 4005.8 312.8 2721.62 N 2939.24W . 6125.00 69.04 306.90 0.21 3754.74 4029.0 312.8 2735.65 N 2957.88W 6150.00 69.05 306.77 0.12 3763.68 4052.2 312.7 2749.64 N 2976.57W 6175.00 68.91 306.59 0.22 3772.64 4075.4 312.7 2763.58 N 2995.29W 6200.00 68.79 306.48 0.16 3781.67 4098.6 312.7 2777.46 N 3014.02W 6225.00 68.71 306.44 0.09 3790.73 4121.8 312.6 2791.31 N 3032.76W 6250.00 68.77 306.43 0.06 3799.79 4144.9 312.6 2805.14 N 3051.51W 6275.00 68.95 306.44 0.18 3808.81 4168.1 312.6 2818.99 N 3070.27W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 6300.00 69.09 306.43 0.14 3817.76 4191.3 312.5 2832.85 N 3089.05W 6325.00 69.22 306.41 0.13 3826.66 4214.6 312.5 2846.72 N 3107.85W 6350.00 69.37 306.39 0.15 3835.50 4237.8 312.5 2860.60 N 3126.67W 6375.00 69.54 306.39 0.17 3844.27 4261.1 312.4 2874.49 N 3145.51W 6400.00 69.75 306.39 0.21 3852.97 4284.4 312.4 2888.40 N 3164.38W 6425.00 69.91 306.38 0.16 3861.58 4307.7 312.4 2902.32 N 3183.27W 6450.00 70.00 306.37 0.09 3870.15 4331.1 312.3 2916.25 N 3202.18W 6475.00 69.98 306.35 0.04 3878.71 4354.5 312.3 2930.18 N 3221.10W 6500.00 69.92 306.30 0.08 3887.28 4377.8 312.3 2944.09 N 3240.02W 6525.00 69.89 306.27 0.04 3895.87 4401.2 312.2 2957.98 N 3258.95W 6550.00 69.83 306.25 0.06 3904.48 4424.5 312.2 2971.86 N 3277.87W 6575.00 69.80 306.21 0.05 3913.11 4447.9 312.2 2985.73 N 3296.80W 6600.00 69.73 306.19 0.08 3921.75 4471.2 312.1 2999.58 N 3315.73W . 6625.00 69.59 306.17 0.14 3930.44 4494.5 312.1 3013.42 N 3334.65W 6650.00 69.54 306.14 0.06 3939.17 4517.8 312.1 3027.24 N 3353.56W 6675.00 69.59 306.15 0.06 3947.90 4541. 1 312.0 3041.06 N 3372.48W 6700.00 69.67 306.18 0.08 3956.61 4564.4 312.0 3054.89 N 3391.40W 6725.00 69.71 306.23 0.06 3965.28 4587.7 312.0 3068.74 N 341O.32W 6750.00 69.71 306.31 0.08 3973.95 4611.1 312.0 3082.61 N 3429.23W 6775.00 69.71 306.43 0.11 3982.62 4634.4 311.9 3096.52 N 3448.11W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHST AR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg.l feet feet deg. feet 25 f1. . 6800.00 69.64 306.61 0.18 3991.31 4657.8 311.9 31l0.47N 3466.95W 6825.00 69.51 306.78 0.20 4000.03 4681.1 311.9 3124.47 N 3485.73 W 6850.00 69.46 306.92 0.15 4008.79 4704.4 311.8 3138.51 N 3504.47W 6875.00 69.44 307.09 0.15 4017.57 4727.7 311.8 3152.60N 3523.16W 6900.00 69.34 307.26 0.20 4026.37 4751.1 311.8 3166.74 N 3541.81 W 6925.00 69.19 307.41 0.20 4035.22 4774.4 311.8 3180.92 N 3560.40W 6950.00 69.17 307.54 0.12 4044.10 4797.7 311.8 3195.13 N 3578.94W 6975.00 69.17 307.67 0.13 4052.99 4821.0 311.7 3209.39 N 3597.46W 7000.00 69.09 307.80 0.14 4061.90 4844.3 311.7 3223.69 N 3615.93W 7025.00 68.98 307.94 0.17 4070.84 4867.6 311.7 3238.02 N 3634.36W 7050.00 68.91 308.12 0.18 4079.83 4890.9 311.7 3252.39 N 3652.74W 7075.00 68.86 308.23 0.11 4088.83 4914.1 311.7 3266.81 N 3671.07W 7100.00 68.81 308.27 0.06 4097.86 4937.4 311.6 3281.24 N 3689.38W . 7125.00 68.77 308.33 0.07 4106.90 4960.7 311.6 3295.69 N 3707.67W 7150.00 68.69 308.44 0.14 4115.97 4983.9 311.6 3310.15N 3725.93W 7175.00 68.60 308.59 0.16 4125.07 5007.2 311.6 3324.65 N 3744.15W 7200.00 68.57 308.72 0.12 4134.20 5030.4 311.6 3339.19 N 3762.32W 7225.00 68.54 308.87 0.14 4143.34 5053.7 311.6 3353.77 N 3780.46W 7250.00 68.52 309.00 0.13 4152.50 5076.9 311.6 3368.39 N 3798.56W 7275.00 68.48 309.15 0.14 4161.66 5100.2 311.6 3383.05 N 3816.61W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 7300.00 68.39 309.34 0.20 4170.84 5123.4 311.5 3397.76 N 3834.62W 7325.00 68.29 309.50 0.18 4180.07 5146.6 311.5 3412.51 N 3852.57W 7350.00 68.18 309.62 0.16 4189.34 5169.8 311.5 3427.30 N 3870.47W 7375.00 68.11 309.74 0.13 4198.65 5193.0 311.5 3442.11 N 3888.33W 7400.00 68.06 309.90 0.15 4207.98 5216.2 311.5 3456.97 N 3906.14W 7425.00 67.99 310.06 0.16 4217.34 5239.4 311.5 3471.86 N 3923.91 W 7450.00 67.93 310.24 0.18 4226.72 5262.5 311.5 3486.80 N 3941.62W 7475.00 67.86 310.46 0.22 4236.12 5285.7 311.5 3501.80 N 3959.27W 7500.00 67.75 310.63 0.19 4245.57 5308.8 311.5 3516.85 N 3976.86W 7525.00 67.63 310.74 0.16 4255.05 5332.0 311.5 3531.92 N 3994.40W 7550.00 67.59 310.87 0.13 4264.58 5355.1 311.5 3547.03 N 4011.90W 7575.00 67.57 311.05 0.16 4274.11 5378.2 311.5 3562.18 N 4029.35W 7600.00 67.55 311.23 0.17 4283.66 5401.3 311.5 3577.38 N 4046.75W . 7625.00 67.51 311.39 0.15 4293.21 5424.4 311.5 3592.63 N 4064.11 W 7650.00 67.49 311.54 0.14 4302.78 5447.5 311.5 3607.92 N 4081.42W 7675.00 67.58 311.63 0.12 4312.33 5470.6 311.5 3623.26 N 4098.70W 7700.00 67.72 311.69 0.15 4321.83 5493.7 311.5 3638.63 N 4115.97W 7725.00 67.94 311. 70 0.22 4331.27 5516.9 311.5 3654.03 N 4133.26W 7750.00 68.21 311.71 0.27 4340.60 5540.1 311.5 3669.46 N 4150.57W 7775.00 68.50 311.72 0.29 4349.82 5563.3 311.5 3684.92 N 4167.92W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 7800.00 68.85 311. 75 0.36 4358.92 5586.6 311.5 3700.42 N 4185.30W 7825.00 69.27 311.79 0.42 4367.85 5609.9 311.5 3715.98 N 4202.71 W 7850.00 69.60 311.80 0.33 4376.63 5633.3 311.5 3731.58N 4220.16W 7875.00 69.83 311.81 0.23 4385.30 5656.8 311.5 3747.21 N 4237.64W 7900.00 69.90 311.82 0.08 4393.90 5680.3 311.5 3762.86 N 4255.14W 7925.00 69.83 311.84 0.08 4402.51 5703.7 311.5 3778.51 N 4272.62W 7950.00 69.79 311.85 0.05 4411.14 5727.2 311.5 3794.17N 4290.10W 7975.00 69.79 311.86 0.01 4419.78 5750.6 311.5 3809.82 N 4307.58W 8000.00 69.72 311.86 0.07 4428.43 5774.1 311.5 3825.47 N 4325.05W 8025.00 69.67 311.86 0.05 4437.10 5797.5 311.5 3841.12 N 4342.51 W 8050.00 69.63 311.85 0.04 4445.80 5821.0 311.5 3856.76 N 4359.97W 8075.00 69.53 311.81 0.10 4454.52 5844.4 311.5 3872.38 N 4377.43W 8100.00 69.40 311.81 0.13 4463.29 5867.8 311.5 3887.99 N 4394.88W . 8125.00 69.35 3 11.80 0.05 4472.09 5891.2 311.5 3903.59 N 4412.32W 8150.00 69.27 311.69 0.13 4480.93 5914.6 311.5 3919.16N 4429.77W 8175.00 69.06 311.51 0.27 4489.82 5938.0 311.5 3934.67 N 4447.24W 8200.00 69.10 311.45 0.07 4498.75 5961.3 311.5 3950.14 N 4464.73W 8225.00 69.22 311.44 0.12 4507.64 5984.7 311.5 3965.60 N 4482.25W 8250.00 69.16 311.41 0.07 4516.52 6008.1 311.5 3981.07 N 4499.77W 8275.00 69.15 311.39 0.02 4525.42 6031.4 311.5 3996.52 N 4517.29W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 8300.00 69.37 311.38 0.22 4534.28 6054.8 311.5 4011.97 N 4534.84W 8325.00 69.62 311.39 0.25 4543.03 6078.2 311.5 4027.45 N 4552.40W 8350.00 69.80 311.40 0.18 4551.70 6101.7 311.5 4042.96 N 4569.99W 8375.00 69.81 311.38 0.02 4560.33 6125.1 311.5 4058.47 N 4587.60W 8400.00 69.71 311.37 0.10 4568.98 6148.6 311.5 4073.98 N 4605.20W 8425.00 69.73 311.36 0.03 4577.65 6172.0 311.5 4089.47 N 4622.80W 8450.00 69.79 311.35 0.06 4586.30 6195.5 311.5 4104.97 N 4640.41 W 8475.00 69.88 311.33 0.10 4594.92 6219.0 311.5 4120.47 N 4658.03W 8500.00 69.98 311.34 0.10 4603.49 6242.4 311.5 4135.98 N 4675.66W 8525.00 70.07 311.33 0.08 4612.03 6265.9 311.5 4151.50 N 4693.30W 8550.00 70.10 311.33 0.04 4620.55 6289.4 311.5 4167.02 N 471O.95W 8575.00 70.05 311.32 0.06 4629.07 6312.9 311.5 4182.54 N 4728.60W 8600.00 69.97 311.29 0.08 4637.62 6336.4 311.5 4198.05 N 4746.25W . 8625.00 69.94 311.27 0.04 4646.18 6359.9 311.5 4213.55 N 4763.90W 8650.00 70.09 311.25 0.14 4654.73 6383.4 311.5 4229.04 N 4781.56W 8675.00 70.22 3 11.23 0.13 4663.21 6406.9 311.5 4244.54 N 4799.24W 8700.00 70.22 311.16 0.06 4671.67 6430.5 311.5 4260.04 N 4816.94W 8725.00 70.15 311.02 0.15 4680.15 6454.0 311.5 4275.49 N 4834.67W 8750.00 70.06 310.83 0.20 4688.65 6477.5 311.5 4290.89 N 4852.43W 8775.00 70.14 310.68 0.16 4697.16 6501.0 311.5 4306.24 N 4870.24W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G_509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 8800.00 70.38 310.59 0.25 4705.61 6524.5 311.5 4321.56 N 4888.09W 8825.00 70.65 310.54 0.28 4713.95 6548.1 311.5 4336.89 N 4906.00W 8850.00 70.70 310.46 0.09 4722.22 6571.7 311.5 4352.21 N 4923.94W 8875.00 70.58 310.35 0.16 4730.51 6595.3 311.5 4367.50 N 4941.90W 8900.00 70.63 310.30 0.07 4738.81 6618.8 311.5 4382.76 N 4959.88W 8925.00 70.72 310.28 0.09 4747.08 6642.4 311.5 4398.01 N 4977.87W 8950.00 70.73 310.23 0.05 4755.34 6666.0 311.5 4413.26 N 4995.88W 8975.00 70.69 310.18 0.06 4763.60 6689.6 311.5 4428.49 N 5013.91W 9000.00 70.67 310.15 0.03 4771.87 6713.2 311.4 4443.71 N 5031.93W 9025.00 70.69 310.15 0.03 4780.14 6736.8 311.4 4458.92 N 5049.97W 9050.00 70.72 310.12 0.04 4788.40 6760.4 311.4 4474.13 N 5068.01 W 9075.00 70.77 310.06 0.07 4796.64 6784.0 311.4 4489.33 N 5086.06W 9100.00 70.82 310.01 0.07 4804.87 6807.6 311.4 4504.52 N 5104.14W . 9125.00 70.84 309.97 0.04 4813.07 6831.2 311.4 4519.69 N 5122.23W 9150.00 70.93 309.95 0.08 4821.26 6854.8 311.4 4534.86 N 5140.34W 9175.00 70.95 309.92 0.04 4829.43 6878.4 311.4 4550.03 N 5158.45W 9200.00 70.97 309.90 0.03 4837.58 6902.0 311.4 4565.20 N 5176.58W 9225.00 71.04 309.86 0.07 4845.72 6925.7 311.4 4580.35 N 5194.72W 9250.00 71.12 309.82 0.09 4853.83 6949.3 311.4 4595.50 N 5212.88W 9275.00 71.13 309.75 0.07 4861.91 6972.9 311.4 4610.64 N 5231.06W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 9300.00 70.99 309.69 0.15 4870.03 6996.6 311.4 4625.75 N 5249.25W 9325.00 70.83 309.68 0.16 4878.20 7020.2 311.4 4640.84 N 5267.43W 9350.00 70.67 309.72 0.17 4886.44 7043.8 311.4 4655.92 N 5285.59W 9375.00 70.59 309.77 0.09 4894.73 7067.4 311.4 4671.00 N 5303.72W 9400.00 70.61 309.81 0.04 4903.04 7090.9 311.4 4686.09 N 5321.84W 9425.00 70.55 309.83 0.07 4911.35 7114.5 311.4 4701.19 N 5339.95W 9450.00 70.37 309.86 0.18 4919.71 7138.1 311.4 4716.29 N 5358.03W 9475.00 70.20 309.90 0.17 4928.15 7161.6 311.4 4731.38 N 5376.09W 9500.00 70.14 309.96 0.08 4936.63 7185.1 311.3 4746.47 N 5394.13W 9525.00 70.15 310.01 0.05 4945.12 7208.6 311.3 4761.58 N 5412.15W 9550.00 70.10 310.03 0.05 4953.62 7232.1 311.3 4776.70 N 5430.15W 9575.00 70.00 310.02 0.10 4962.15 7255.6 311.3 4791.81 N 5448.15W 9600.00 69.93 309.97 0.09 4970.71 7279.1 311.3 4806.90 N 5466.14W . 9625.00 69.86 309.94 0.07 4979.30 7302.6 311.3 4821.98 N 5484.14W 9650.00 69.73 309.94 0.13 4987.94 7326.0 311.3 4837.04 N 5502.13W 9675.00 69.60 309.94 0.13 4996.63 7349.4 311.3 4852.09 N 5520.10W 9700.00 69.49 309.92 0.11 5005.36 7372.9 311.3 4867.12 N 5538.06W 9725.00 69.45 309.91 0.05 5014.13 7396.3 311.3 4882.15 N 5556.02W 9750.00 69.46 309.92 0.02 5022.90 7419.7 311.3 4897.17N 5573.98W 9775.00 69.44 309.93 0.03 5031.68 7443 .1 311.3 4912.19 N 5591.93W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-2l, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 9800.00 69.40 309.93 0.04 5040.47 7466.5 311.3 4927.21 N 5609.87W 9825.00 69.32 309.94 0.08 5049.28 7489.9 311.3 4942.23 N 5627.81W 9850.00 69.20 309.92 0.12 5058.14 7513.2 311.3 4957.24 N 5645.74W 9875.00 69.12 309.88 0.09 5067.03 7536.6 311.3 4972.22 N 5663.67W 9900.00 68.99 309.84 0.14 5075.97 7559.9 311.3 4987.19 N 5681.59W 9925.00 68.89 309.80 0.10 5084.95 7583.2 311.3 5002.13 N 5699.51W 9950.00 68.82 309.81 0.07 5093.97 7606.6 311.3 5017.05 N 5717.42W 9975.00 68.68 309.81 0.14 5103.03 7629.9 311.3 5031.97 N 5735.32W 10000.00 68.61 309.79 0.07 5112.13 7653.1 311.3 5046.88 N 5753.21W 10025.00 68.56 309.81 0.05 5121.26 7676.4 311.3 5061.78 N 5771.09W 10050.00 68.43 309.86 0.15 5130.42 7699.6 311.2 5076.67 N 5788.95W 10075.00 68.23 309.91 0.20 5139.66 7722.9 311.2 5091.57 N 5806.78W 10100.00 68.09 309.94 0.14 5148.96 7746.1 311.2 5106.46 N 5824.57W . 10125.00 68.26 309.94 0.16 5158.25 7769.3 311.2 5121.36 N 5842.37W 10150.00 68.44 309.92 0.19 5167.48 7792.5 311.2 5136.28 N 5860.19W 10175.00 68.45 309.88 0.04 5176.66 7815.8 311.2 5151.19N 5878.03W 10200.00 68.40 309.83 0.07 5185.85 7839.0 311.2 5166.09 N 5895.88W 10225.00 68.40 309.77 0.05 5195.06 7862.2 311.2 5180.97 N 5913.73W 10250.00 68.37 309.70 0.07 5204.26 7885.5 311.2 5195.82 N 5931.61 W 10275.00 68.29 309.66 0.09 5213.49 7908.7 311.2 5210.66 N 5949.49W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 10300.00 68.24 309.64 0.06 5222.75 7931.9 311.2 5225.48 N 5967.37W 10325.00 68.26 309.63 0.02 5232.02 7955.1 311.2 5240.29 N 5985.25W 10350.00 68.30 309.62 0.04 5241.27 7978.3 311.2 5255.10 N 6003.14W 10375.00 68.40 309.67 0.12 5250.49 8001.6 311.2 5269.93 N 6021.03W 10400.00 68.54 309.77 0.16 5259.67 8024.8 311.2 5284.79 N 6038.92W 10425.00 68.72 309.94 0.24 5268.78 8048.1 311.2 5299.71 N 6056.79W 10450.00 68.94 310.06 0.25 5277.81 8071.4 311.2 5314.69 N 6074.65W 10475.00 69.17 310.10 0.23 5286.74 8094.7 311.2 5329.73 N 6092.51W 10500.00 69.35 310.12 0.18 5295.60 8118.1 311.2 5344.79 N 6110.40W 10525.00 69.44 310.17 0.10 5304.40 8141.5 311.2 5359.87 N 6128.28W 10550.00 69.48 310.21 0.05 5313.17 8164.9 311.2 5374.98 N 6146.17W 10575.00 69.66 310.22 0.18 5321.89 8188.3 311.2 5390.11 N 6164.06W 10600.00 69.89 310.21 0.24 5330.54 8211.8 311.2 5405.25 N 6181.97W . 10625.00 69.98 310.26 0.10 5339.11 8235.3 311.2 5420.42 N 6199.90W 10650.00 70.07 310.34 0.11 5347.65 8258.8 311.2 5435.62 N 6217.81W 10675.00 70.07 3 1 0.44 0.09 5356.17 8282.3 311.2 5450.85 N 6235.71 W 10700.00 70.14 310.46 0.07 5364.68 8305.8 311.2 5466.10 N 6253.60W 10725.00 70.24 310.4 7 0.10 5373.16 8329.3 311.2 5481.37 N 6271.50W 10750.00 70.15 310.48 0.09 5381.63 8352.8 311.2 5496.64 N 6289.39W 10775.00 70.00 310.47 0.15 5390.15 8376.3 311.2 5511.89 N 6307.27W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Wen: NS-2l, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. 10800.00 69.67 310.47 0.33 5398.77 8399.8 311.1 5527.13 N 6325.12W . 10825.00 69.43 310.46 0.24 5407.50 8423.2 311.1 5542.33 N 6342.94W 10850.00 69.41 310.45 0.02 5416.29 8446.6 311.1 5557.51 N 6360.75W 10875.00 69.15 310.42 0.26 5425.13 8470.0 311.1 5572.68 N 6378.55W 10900.00 68.94 310.41 0.21 5434.07 8493.3 311.1 5587.82 N 6396.32W 10925.00 68.81 310.41 0.13 5443.08 8516.6 311.1 5602.93 N 6414.08W 10950.00 68.73 310.39 0.09 5452.14 8539.9 311.1 5618.04 N 6431.83W 10975.00 68.70 310.41 0.03 5461.21 8563.2 311.1 5633.13 N 6449.57W 11000.00 68.29 310.39 0.42 5470.38 8586.5 311.1 5648.21 N 6467.28W 11025.00 68.12 310.36 0.17 5479.66 8609.7 311.1 5663.24 N 6484.97W 11050.00 68.33 310.34 0.21 5488.93 8632.9 311.1 5678.27 N 6502.66W 11075.00 68.32 310.38 0.04 5498.17 8656.2 311.1 5693.32 N 6520.36W 11100.00 68.15 310.49 0.20 5507.44 8679.4 311.1 5708.38 N 6538.03W . 11125.00 67.95 310.62 0.23 5516.78 8702.6 311.1 5723.45 N 6555.65W 11150.00 67.97 310.68 0.05 5526.16 8725.7 311.1 5738.55 N 6573.23W 11175.00 67.87 310.71 0.10 5535.56 8748.9 311.1 5753.65 N 6590.80W 11200.00 67.85 310.80 0.08 5544.98 8772.0 311.1 5768.77 N 6608.34W 11225.00 67.99 310.86 0.15 5554.38 8795.2 311.1 5783.92 N 6625.87W 11250.00 67.98 310.93 0.07 5563.76 8818.4 311.1 5799.09 N 6643.39W 11275.00 68.06 310.99 0.10 5573.11 8841.6 311.1 5814.29 N 6660.89W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 11300.00 67.97 311.02 0.09 5582.47 8864.8 311.1 5829.50 N 6678.39W 11325.00 68.03 311.03 0.06 5591.84 8887.9 311.1 5844.71 N 6695.87W 11350.00 68.28 3] 1.05 0.25 5601.14 8911.1 311.1 5859.95 N 6713.38W 11375.00 68.38 311.19 0.17 5610.38 8934.4 311.1 5875.23 N 6730.88W 11400.00 68.54 3] 1.31 0.]9 5619.56 8957.6 311.1 5890.56 N 6748.36W 11425.00 68.64 311.36 0.12 5628.68 8980.9 311.1 5905.93 N 6765.84W 11450.00 68.80 311.39 0.16 5637.76 9004.2 311.1 5921.33 N 6783.32W 11475.00 69.02 311.42 0.22 5646.75 9027.5 311.1 5936.75 N 6800.81 W 11500.00 69.07 311.55 0.13 5655.69 9050.9 311.1 5952.22 N 6818.30W 11525.00 69.17 3 11. 64 0.14 5664.60 9074.2 311.1 5967.73 N 6835.77W 11550.00 69.12 311.65 0.06 5673.50 9097.6 311.1 5983.25 N 6853.23W 11575.00 69.15 311.62 0.05 5682.41 9]20.9 3]1.1 5998.77 N 6870.69W 11600.00 69.31 311.55 0.17 5691.27 9144.3 311.1 6014.29 N 6888.17W . 11625.00 69.40 3 11.48 0.11 5700.08 9167.7 311.1 6029.80 N 6905.69W 11650.00 69.52 311.42 0.13 5708.86 9191.1 311.1 6045.29 N 6923.24W 11675.00 69.42 311.31 0.14 5717.62 9214.5 311.1 6060.77 N 6940.81 W 11700.00 69.37 311.24 0.09 5726.42 9237.9 311.1 6076.20 N 6958.39W 11725.00 69.35 3] 1.20 0.04 5735.24 9261.3 311.1 6091.62 N 6975.99W 11750.00 69.42 311.15 0.07 5744.04 9284.7 311.1 6107.02 N 6993.60W 11775.00 69.58 311.13 0.17 5752.79 9308.1 311.1 6122.43 N 7011.24W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NOR THST AR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH D IS T. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 11800.00 69.61 311.11 0.03 5761.51 9331.6 31Ll 6137.84 N 7028.89W 11825.00 69.68 311.05 0.09 5770.20 9355.0 311.1 6153.24 N 7046.56W 11850.00 69.71 310.92 0.12 5778.88 9378.5 311.1 6168.62 N 7064.26W 11875.00 69.77 310.81 0.13 5787.54 9401.9 31Ll 6183.96 N 7082.00W 11900.00 69.90 310.76 0.14 5796.15 9425.4 311.1 6199.29 N 7099.77W 11925.00 69.89 310.64 0.11 5804.75 9448.9 31Ll 6214.60 N 7117.56W 11950.00 70.01 310.54 0.15 5813.32 9472.3 31Ll 6229.88 N 7135.40W 11975.00 70.06 310.44 0.11 5821.85 9495.8 311.1 6245.14 N 7153.27W 12000.00 70.08 310.35 0.08 5830.37 9519.3 311.1 6260.37 N 7171.17W 12025.00 70.06 310.26 0.09 5838.90 9542.8 311.1 6275.57 N 7189.09W 12050.00 70.05 310.16 0.09 5847.42 9566.3 311.1 6290.74 N 7207.04W 12075.00 70.20 310.1 0 0.16 5855.92 9589.8 311.1 6305.90 N 7225.01W 12100.00 70.43 310.05 0.24 5864.35 9613.4 31Ll 6321.05 N 7243.02W . 12125.00 70.63 309.99 0.21 5872.68 9636.9 31Ll 6336.21 N 7261.07W 12150.00 70.67 309.94 0.07 5880.96 9660.5 311.1 6351.36 N 7279.15W 12175.00 70.46 309.81 0.25 5889.28 9684.1 31Ll 6366.48 N 7297.25W 12200.00 70.37 309.71 0.13 5897.66 9707.6 311.1 6381.54 N 7315.35W 12225.00 70.36 309.63 0.07 5906.06 9731.2 311.1 6396.57 N 7333.48W 12250.00 70.39 309.56 0.07 5914.46 9754.7 311.1 6411.58 N 7351.62W 12275.00 70.36 309.50 0.06 5922.85 9778.3 31Ll 6426.57 N 7369.79W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NOR THST AR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. 309.44 0.09 5931.27 9801.8 311.1 6441.53 N 7387.96W . 12300.00 70.29 12325.00 70.26 309.40 0.05 5939.70 9825.3 311.1 6456.48 N 7406.14W 12350.00 70.30 309.35 0.07 5948.14 9848.8 311.1 6471.41 N 7424.33W 12375.00 70.27 309.28 0.07 5956.57 9872.4 311.1 6486.32 N 7442.54W 12400.00 70.17 309.23 0.11 5965.03 9895.9 311.1 6501.20 N 7460.76W 12425.00 70.12 309.16 0.08 5973.52 9919.4 311.1 6516.06 N 7478.98W 12450.00 70.09 309.10 0.07 5982.02 9942.9 311.1 6530.90 N 7497.21 W 12475.00 70.04 309.07 0.06 5990.55 9966.4 311.1 6545.72 N 7515.46W 12500.00 70.09 309.02 0.06 5999.07 9989.9 311.1 6560.52 N 7533.71 W 12525.00 70.08 308.92 0.09 6007.59 10013.3 311.0 6575.31 N 7551.98W 12550.00 70.01 308.86 0.09 6016.12 10036.8 311.0 6590.06 N 7570.27W 12575.00 70.00 308.81 0.05 6024.67 10060.3 311.0 6604.79 N 7588.57W 12600.00 69.96 308.75 0.06 6033.23 10083.8 311.0 6619.50 N 7606.89W . 12625.00 69.99 308.71 0.05 6041. 79 10107.2 311.0 6634.20 N 7625.21 W 12650.00 69.99 308.62 0.09 6050.34 10130.7 311.0 6648.88 N 7643.55W 12675.00 70.04 308.53 0.10 6058.88 10154.2 311.0 6663.53 N 7661.92W 12700.00 69.91 308.48 0.14 6067.44 10177.7 311.0 6678.15 N 7680.30W 12725.00 69.73 308.43 0.19 6076.07 10201.1 311.0 6692.74 N 7698.68W 12750.00 69.67 308.36 0.09 6084.74 10224.5 311.0 6707.30 N 7717.05W 12775.00 69.57 308.32 0.11 6093.45 10247.9 311.0 6721.84 N 7735.43W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 12800.00 69.52 308.30 0.05 6102.19 10271.3 311.0 6736.36 N 7753.81W 12825.00 69.44 308.28 0.08 6110.95 10294.7 311.0 6750.87 N 7772.19W 12850.00 69.35 308.25 0.10 6119.75 10318.1 311.0 6765.36 N 7790.56W 12875.00 69.31 308.20 0.06 6128.58 10341.5 311.0 6779.83 N 7808.94W 12900.00 69.20 308.11 0.14 6137.43 10364.8 311.0 6794.28 N 7827.32W 12925.00 69.15 308.03 0.09 6146.32 10388.1 311.0 6808.69 N 7845.72W 12950.00 68.96 307.93 0.21 6155.26 10411.5 310.9 6823.05 N 7864.12W 12975.00 69.01 307.87 0.07 6164.22 10434.8 310.9 6837.39 N 7882.54W 13000.00 69.18 307.88 0.18 6173.14 10458.1 310.9 6851.73 N 7900.97W 13025.00 69.05 307.85 0.14 6182.06 10481.4 310.9 6866.07 N 7919.41W 13050.00 68.98 307.80 0.08 6191.01 10504.7 310.9 6880.38 N 7937.85W 13075.00 68.95 307.74 0.06 6199.98 10528.0 310.9 6894.67 N 7956.30W 13100.00 68.95 307.67 0.07 6208.96 10551.3 310.9 6908.94 N 7974.76W . 13125.00 68.92 307.58 0.08 6217.95 10574.6 310.9 6923.18 N 7993.23W 13150.00 68.70 307.52 0.23 6226.98 10597.9 310.9 6937.39 N 8011.71 W 13175.00 68.69 307.47 0.05 6236.07 10621.1 310.9 6951.57 N 8030.19W 13200.00 68.79 307.45 0.10 6245.13 10644.4 310.9 6965.74 N 8048.69W 13225.00 68.90 307.51 0.13 6254.15 10667.7 310.9 6979.92 N 8067.19W 13250.00 68.85 307.68 0.17 6263.16 10690.9 310.9 6994.15 N 8085.67W 13275.00 68.72 307.86 0.22 6272.21 10714.2 310.9 7008.42 N 8104.09W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 13300.00 68.78 307.95 0.10 6281.27 10737.5 310.8 7022.74 N 8122.47W 13325.00 68.74 308.06 0.11 6290.33 10760.8 310.8 7037.09 N 8140.83W 13350.00 68.79 308.20 0.14 6299.38 10784.0 310.8 7051.48 N 8159.16W 13375.00 68.79 308.42 0.20 6308.42 10807.3 310.8 7065.92 N 8177.45W 13400.00 68.74 308.58 0.16 6317.48 10830.6 310.8 7080.43 N 8195.69W 13425.00 68.76 308.67 0.08 6326.54 10853.9 310.8 7094.97 N 8213.89W 13450.00 68.78 308.83 0.16 6335.59 10877 .2 310.8 7109.56 N 8232.07W 13475.00 68.83 309.02 0.18 6344.63 10900.5 310.8 7124.21 N 8250.20W 13500.00 68.91 309.18 0.17 6353.64 10923.8 310.8 7138.91 N 8268.30W 13525.00 68.93 309.35 0.16 6362.63 10947.1 310.8 7153.68 N 8286.36W 13550.00 68.98 309.48 0.13 6371.61 10970.4 310.8 7168.49 N 8304.39W 13575.00 69.02 309.58 0.10 6380.57 10993.8 310.8 7183.35 N 8322.39W 13600.00 69.04 309.66 0.08 6389.52 11017.1 310.8 7198.23 N 8340.37W . 13625.00 69.05 309.73 0.07 6398.46 11040.4 310.8 7213.14 N 8358.33W 13650.00 69.04 309.80 0.07 6407.40 11063.8 310.8 7228.08 N 8376.28W 13675.00 69.01 309.85 0.05 6416.35 11087.1 310.8 7243.03 N 8394.20W 13700.00 69.08 309.87 0.07 6425.29 11110.5 310.8 7257.99 N 8412.13W 13725.00 69.17 309.91 0.09 6434.20 11133.8 310.8 7272.97 N 8430.05W 13750.00 69.17 309.97 0.06 6443.09 11157.2 310.8 7287.97 N 8447.96W 13775.00 69.18 309.98 0.02 6451.98 11180.5 310.8 7302.99 N 8465.87W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 13800.00 69.27 309.95 0.10 6460.85 11203.9 310.8 7318.00 N 8483.78W 13825.00 69.31 309.96 0.04 6469.68 11227.3 310.8 7333.02 N 8501.71 W 13850.00 69.17 309.98 0.14 6478.55 11250.7 310.8 7348.03 N 8519.62W 13875.00 69.04 310.00 0.13 6487.46 11274.0 310.8 7363.04 N 8537.52W 13900.00 69.09 310.00 0.04 6496.39 11297.4 310.8 7378.05 N 8555.41 W 13925.00 69.29 310.00 0.20 6505.28 11320.7 310.8 7393.07 N 8573.31W 13950.00 69.50 309.99 0.22 6514.07 11344.1 310.8 7408.11 N 8591.23W 13975.00 69.51 310.01 0.02 6522.83 11367.6 310.8 7423.17N 8609.17W 14000.00 69.42 310.05 0.10 6531.59 11391.0 310.8 7438.23 N 8627.IOW 14025.00 69.39 310.08 0.04 6540.39 11414.4 310.8 7453.29 N 8645.01 W 14050.00 69.39 310.09 0.01 6549.19 11437.8 310.8 7468.36 N 8662.91W 14075.00 69.28 310.11 0.11 6558.01 11461.2 310.8 7483.42 N 8680.81 W 14100.00 69.23 310.10 0.05 6566.87 11484.5 310.8 7498.48 N 8698.69W . 14125.00 69.38 310.07 0.16 6575.70 11507.9 310.8 7513.54 N 8716.58W 14150.00 69.50 310.05 0.12 6584.48 11531.3 310.8 7528.61 N 8734.50W 14175.00 69.57 310.02 0.07 6593.22 11554.7 310.8 7543.67 N 8752.43W 14200.00 69.64 309.99 0.07 6601.93 11578.2 310.8 7558.74 N 8770.38W 14225.00 69.65 309.96 0.03 6610.62 11601.6 310.8 7573.80 N 8788.34W 14250.00 69.74 309.96 0.09 6619.30 11625.1 310.8 7588.86 N 8806.32W 14275.00 69.73 309.97 0.02 6627.96 11648.5 310.8 7603.92 N 8824.29W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 14300.00 69.66 310.00 0.08 6636.63 11671.9 310.8 7618.99 N 8842.25W 14325.00 69.72 310.04 0.07 6645.31 11695.4 310.7 7634.06 N 8860.21 W 14350.00 69.78 310.07 0.07 6653.97 11718.8 310.7 7649.16N 8878.16W 14375.00 69.87 310.09 0.09 6662.59 11742.3 310.7 7664.26 N 8896.12W 14400.00 69.93 310.09 0.06 6671.18 11765.8 310.7 7679.38 N 8914.08W 14425.00 69.94 310.04 0.05 6679.76 11789.3 310.7 7694.50 N 8932.05W 14450.00 69.98 309.99 0.07 6688.33 11812.8 310.7 7709.60 N 8950.04W 14475.00 70.10 309.96 0.12 6696.86 11836.2 310.7 7724.70 N 8968.04W 14500.00 70.26 309.97 0.16 6705.34 11859.8 310.7 7739.80 N 8986.07W 14525.00 70.29 309.97 0.03 6713.77 11883.3 310.7 7754.92 N 9004.11W 14550.00 70.25 309.95 0.05 6722.21 11906.8 310.7 7770.04 N 9022.14W 14575.00 70.22 309.92 0.03 6730.67 11930.4 310.7 7785.14 N 9040.18W 14600.00 70.13 309.92 0.10 6739.14 11953.9 310.7 7800.23 N 9058.22W . 14625.00 69.95 309.93 0.17 6747.68 11977.4 310.7 7815.31 N 9076.24W 14650.00 69.81 309.93 0.14 6756.28 12000.8 310.7 7830.38 N 9094.24W 14675.00 69.75 309.92 0.06 6764.92 12024.3 310.7 7845.43 N 9112.23W 14700.00 69.71 309.91 0.05 6773.58 12047.7 310.7 7860.48 N 9130.22W 14725.00 69.73 309.93 0.03 6782.24 12071.2 310.7 7875.53 N 9148.2ÜW 14750.00 69.78 309.99 0.07 6790.89 12094.6 310.7 7890.60 N 9166.18W 14775.00 69.71 310.04 0.08 6799.55 12118.1 310.7 7905.68 N 9184.15W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. 14800.00 69.61 310.08 0.11 6808.24 12141.5 310.7 7920.76 N 9202.09W . 14825.00 69.52 310.10 0.09 6816.97 12165.0 310.7 7935.85 N 9220.01 W 14850.00 69.47 310.11 0.04 6825.73 12188.4 310.7 7950.93 N 9237.92W 14875.00 69.39 310.11 0.09 6834.51 12211.8 310.7 7966.01 N 9255.82W 14900.00 69.29 310.12 0.10 6843.33 12235.2 310.7 7981.08 N 9273.71W 14925.00 69.17 310.16 0.12 6852.20 12258.5 310.7 7996.15 N 9291.58W 14950.00 69.05 310.22 0.13 6861.11 12281.9 310.7 8011.22 N 9309.42W 14975.00 69.03 310.28 0.06 6870.05 12305.2 310.7 8026.31 N 9327.24W 15000.00 68.97 310.36 0.09 6879.01 12328.6 310.7 8041.41 N 9345.04W 15025.00 68.92 3 1 0.44 0.09 6887.99 12351.9 310.7 8056.53 N 9362.80W 15050.00 68.85 310.51 0.10 6897.00 12375.2 310.7 8071.67 N 9380.55W 15075.00 68.75 310.56 0.11 6906.04 12398.5 310.7 8086.82 N 9398.26W 15100.00 68.71 310.60 0.05 6915.11 12421.8 310.7 8101.97 N 9415.95W . 15125.00 68.64 310.63 0.07 6924.20 12445.1 310.7 8117.13 N 9433.63W 15150.00 68.60 310.65 0.05 6933.31 12468.4 310.7 8132.29 N 9451.30W 15175.00 68.53 310.67 0.07 6942.45 12491.7 310.7 8147.46 N 9468.95W 15200.00 68.45 310.68 0.08 6951.62 12514.9 310.7 8162.62 N 9486.59W 15225.00 68.54 310.65 0.09 6960.78 12538.2 310.7 8177.77N 9504.23W 15250.00 68.59 310.54 0.11 6969.92 12561.5 310.7 8192.92 N 9521.90W 15275.00 68.61 310.42 0.11 6979.04 12584.7 310.7 8208.03 N 9539.61 W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 15300.00 68.62 310.29 0.12 6988.16 12608.0 310.7 8223.10 N 9557.35W 15325.00 68.62 310.17 0.11 6997.27 12631.3 310.7 8238.14 N 9575.12W 15350.00 68.67 310.07 0.11 7006.37 12654.6 310.7 8253.14 N 9592.92W 15375.00 68.75 309.97 0.12 7015.45 12677.9 310.7 8268.12 N 9610.76W 15400.00 68.76 309.86 0.10 7024.51 12701.2 310.7 8283.07 N 9628.63W 15425.00 68.69 309.73 0.13 7033.58 12724.5 310.7 8297.98 N 9646.53W 15450.00 68.67 309.61 0.12 7042.67 12747.8 310.7 8312.85 N 9664.46W 15475.00 68.66 309.50 0.10 7051.77 12771.0 310.7 8327.68 N 9682.42W 15500.00 68.64 309.38 0.11 7060.87 12794.3 310.7 8342.47 N 9700.40W 15525.00 68.68 309.27 0.11 7069.96 12817.6 310.7 8357.22 N 9718.41 W 15550.00 68.67 309.18 0.09 7079.06 12840.9 310.7 8371.95 N 9736.45W 15575.00 68.57 309.06 0.15 7088.17 12864.1 310.7 8386.64 N 9754.51 W 15600.00 68.53 308.93 0.13 7097.31 12887.4 310.7 8401.28 N 9772.60W . 15625.00 68.55 308.82 0.10 7106.46 12910.7 310.7 8415.89 N 9790.71W 15650.00 68.54 308.71 0.10 7115.60 12933.9 310.7 8430.45 N 9808.85W 15675.00 68.46 308.58 0.15 7124.77 12957.2 310.7 8444.98 N 9827.02W 15700.00 68.40 308.45 0.14 7133.96 12980.4 310.7 8459.46 N 9845.21W 15725.00 68.42 308.32 0.12 7143.15 13003.6 310.7 8473.89 N 9863.43W 15750.00 68.46 308.22 0.11 7152.34 13026.9 310.7 8488.29 N 9881.69W 15775.00 68.47 308.10 0.11 7161.52 13050.1 310.7 8502.66 N 9899,97W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg.l feet feet deg. feet 25 ft. . 15800.00 68.44 307.98 0.11 7170.70 13073.3 310.7 8516.99 N 9918.29W 15825.00 68.32 307.89 0.14 7179.91 13096.5 310.6 8531.28 N 9936.62W 15850.00 68.28 307.83 0.07 7189.15 13119.7 310.6 8545.54 N 9954.95W 15875.00 68.37 307.82 0.09 7198.39 13142.9 310.6 8559.78 N 9973.31 W 15900.00 68.58 307.84 0.22 7207.56 13166.2 310.6 8574.04 N 9991.68W 15925.00 68.90 307.89 0.32 7216.62 13189.4 310.6 8588.35 N 10010.07W 15950.00 69.15 307.95 0.25 7225.57 13212.8 310.6 8602.69 N 10028.48W 15975.00 69.31 308.01 0.17 7234.44 13236.1 310.6 8617.08 N 10046.91W 16000.00 69.52 308.06 0.22 7243.23 13259.5 310.6 8631.50 N 10065.34W 16025.00 69.80 308.09 0.28 7251.92 13282.9 310.6 8645.95 N 10083.79W 16050.00 70.04 308.10 0.24 7260.50 13306.4 310.6 8660.44 N 10102.27W 16075.00 70.10 308.11 0.06 7269.02 13329.8 310.6 8674.94 N 10 120.77W 16100.00 70.09 308.10 0.02 7277.53 13353.3 310.6 8689.45 N 10139.27W . 16125.00 70.08 308.11 0.00 7286.05 13376.8 310.6 8703.95 N 10157.76W 16150.00 70.08 308.10 0.01 7294.57 13400.3 310.6 8718.46 N 10176.26W 16175.00 70.12 308.06 0.05 7303.08 13423.8 310.6 8732.95 N 10194.76W 16200.00 70.13 308.00 0.06 7311.58 13447.3 310.6 8747.44 N 10213.28W 16225.00 70.16 307.96 0.04 7320.07 13470.7 310.6 8761.91 N 10231.81 W 16250.00 70.19 307.94 0.04 7328.54 13494.2 310.6 8776.37 N 10250.36W 16275.00 70.22 307.89 0.05 7337.01 13517.7 310.6 8790.83 N 10268.92W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-2l, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORlZONT AL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg.l feet feet deg. feet 25 ft. . 16300.00 70.31 307.85 0.09 7345.45 13541.2 310.6 8805.27 N 10287.49W 16325.00 70.34 307.82 0.05 7353.87 13564.8 310.6 8819.72 N 10306.08W 16350.00 70.40 307.79 0.06 7362.27 13588.3 310.6 8834.15 N 10324.69W 16375.00 70.46 307.76 0.06 7370.64 13611.8 310.5 8848.58 N 10343.31 W 16400.00 70.45 307.73 0.03 7379.01 13635.3 310.5 8863.00 N 10361.93W 16425.00 70.48 307.71 0.03 7387.36 13658.9 310.5 8877.42 N 10380.57W 16450.00 70.48 307.69 0.02 7395.72 13682.4 310.5 8891.83 N 10399.21 W 16475.00 70.47 307.69 0.01 7404.07 13705.9 310.5 8906.24 N 10417.86W 16500.00 70.40 307.72 0.07 7412.45 13729.5 310.5 8920.64 N 10436.49W 16525.00 70.26 307.74 0.13 7420.86 13753.0 310.5 8935.05 N 10455.11W 16550.00 70.21 307.76 0.06 7429.32 13776.5 310.5 8949.45 N 10473.72W 16575.00 70.09 307.79 0.12 7437.80 13800.0 310.5 8963.85 N 10492.31 W 16600.00 69.96 307.83 0.14 7446.34 13823.4 310.5 8978.26 N 10510.87W . 16625.00 69.93 307.86 0.04 7454.91 13846.9 310.5 8992.67 N 10529.41 W 16650.00 69.88 307.89 0.06 7463.50 13870.4 310.5 9007.08 N 10547.95W 16675.00 69.77 307.94 0.12 7472.13 13893.8 310.5 9021.50 N 10566.46W 16700.00 69.62 307.99 0.16 7480.80 13917.2 310.5 9035.92 N 10584.94W 16725.00 69.58 308.02 0.04 7489.52 13940.6 310.5 9050.35 N 10603.41 W 16750.00 69.60 308.02 0.02 7498.23 13964.0 310.5 9064.79 N 10621.86W 16775.00 69.46 308.02 0.14 7506.98 13987.4 310.5 9079.21 N 10640.32W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH D IS T. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. 69.33 308.02 0.13 7515.77 14010.8 310.5 9093.63 N 10658.75W . 16800.00 16825.00 69.28 308.01 0.06 7524.61 14034.2 310.5 9108.03 N 10677.18W 16850.00 69.23 308.02 0.05 7533.46 14057.5 310.5 9122.43 N 10695.59W 16875.00 69.17 308.04 0.06 7542.34 14080.9 310.5 9136.83 N 10714.00W 16900.00 69.05 308.04 0.12 7551.25 14104.2 310.5 9151.22 N 10732.40W 16925.00 68.94 308.04 0.11 7560.21 14127.5 310.4 9165.60 N 10750.78W 16950.00 68.82 308.06 0.13 7569.22 14150.8 310.4 9179.97N 10769.15W 16975.00 68.73 308.08 0.09 7578.27 14174.1 310.4 9194.34 N 10787.49W 17000.00 68.71 308.09 0.02 7587.35 14197.4 310.4 9208.71 N 10805.83W 17025.00 68.71 308.11 0.02 7596.43 14220.7 310.4 9223.08 N 10824.16W 17050.00 68.76 308.11 0.06 7605.49 14244.0 310.4 9237.46 N 10842.49W 17075.00 68.76 308.09 0.03 7614.55 14267.2 310.4 9251.84 N 10860.83W 17100.00 68.70 308.04 0.07 7623.62 14290.5 310.4 9266.21 N 10879.17W . 17125.00 68.67 308.00 0.04 7632.71 14313.8 310.4 9280.55 N 10897.52W 17150.00 68.64 307.98 0.04 7641.81 14337.1 310.4 9294.89 N 10915.87W 17175.00 68.63 307.97 0.02 7650.91 14360.3 310.4 9309.21 N 10934.22W 17200.00 68.61 307.97 0.01 7660.03 14383.6 310.4 9323.53 N 10952.57W 17225.00 68.64 307.96 0.02 7669.14 14406.8 310.4 9337.86 N 10970.93W 17250.00 68.64 307.94 0.01 7678.25 14430.1 310.4 9352.17N 10989.28W 17275.00 68.65 307.93 0.01 7687.35 14453.4 310.4 9366.49 N 11007.65W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. 9380.80 N . 17300.00 68.68 307.90 0.04 7696.45 14476.6 310.4 11026.02W 17325.00 68.64 307.90 0.04 7705.55 14499.9 310.4 9395.10 N 11044.39W 17350.00 68.64 307.93 0.02 7714.65 14523.1 310.4 9409.41 N 11062.76W 17375.00 68.64 307.91 0.02 7723.76 14546.4 310.4 9423.72 N 11081.13W 17400.00 68.62 307.86 0.05 7732.87 14569.7 310.4 9438.01 N 11099.50W 17425.00 68.64 307.84 0.03 7741.98 14592.9 310.4 9452.30 N 11117.89W 17450.00 68.64 307.83 0.01 7751.09 14616.2 310.4 9466.58 N 11136.27W 17475.00 68.69 307.81 0.05 7760.18 14639.4 310.4 9480.86 N 11154.67W 17500.00 68.71 307.79 0.03 7769.26 14662.7 310.4 9495.13 N 11173.07W 17525.00 68.70 307.78 0.01 7778.34 14686.0 310.4 9509.41 N 11191.48W 17550.00 68.73 307.78 0.04 7787.42 14709.3 310.4 9523.68 N 11209.89W 17575.00 68.73 307.78 0.00 7796.49 14732.5 310.3 9537.95 N 11228.30W 17600.00 68.69 307.76 0.04 7805.57 14755.8 310.3 9552.22 N 11246.72W . 17625.00 68.71 307.77 0.01 7814.65 14779.1 310.3 9566.48 N 11265.13W 17650.00 68.75 307.81 0.06 7823.72 14802.3 310.3 9580.76 N 11283.54W 17675.00 68.81 307.82 0.06 7832.77 14825.6 310.3 9595.05 N 11301.95W 17700.00 68.81 307.80 0.02 7841.80 14848.9 310.3 9609.34 N 11320.36W 17725.00 68.77 307.77 0.05 7850.85 14872.2 310.3 9623.62 N 11338.78W 17750.00 68.76 307.76 0.02 7859.90 14895.5 310.3 9637.89 N 11357.20W 17775.00 68.79 307.77 0.04 7868.96 14918.8 310.3 9652.16 N 11375.63W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. 0.04 7877.99 14942.0 310.3 9666.44 N 11394.06W . 17800.00 68.83 307.74 17825.00 68.83 307.70 0.04 7887.02 14965.3 310.3 9680.70 N 11412.50W 17850.00 68.84 307.70 0.00 7896.05 14988.6 310.3 9694.96 N 11430.94W 17875.00 68.85 307.73 0.03 7905.07 15011.9 310.3 9709.22 N 11449.38W 17900.00 68.83 307.76 0.03 7914.09 15035.2 310.3 9723.49 N 11467.82W 17925.00 68.80 307.76 0.03 7923.13 15058.5 310.3 9737.77 N 11486.25W 17950.00 68.76 307.73 0.05 7932.17 15081.8 310.3 9752.04 N 11504.68W 17975.00 68.73 307.70 0.04 7941.24 15105.0 310.3 9766.29 N 11523.11 W 18000.00 68.76 307.68 0.03 7950.30 15128.3 310.3 9780.54 N 11541.55W 18025.00 68.79 307.66 0.03 7959.35 15151.6 310.3 9794.78 N 11559.99W 18050.00 68.78 307.67 0.01 7968.40 15174.9 310.3 9809.02 N 11578.44W 18075.00 68.76 307.70 0.04 7977.45 15198.2 310.3 9823.27 N 11596.88W 18100.00 68.72 307.74 0.05 7986.51 15221.4 310.3 9837.52 N 11615.31W . 18125.00 68.67 307.76 0.06 7995.60 15244.7 310.3 9851.78 N 11633.73W 18150.00 68.53 307.80 0.15 8004.72 15268.0 310.3 9866.04 N 11652.12W 18175.00 68.32 307.86 0.21 8013.91 15291.2 310.3 9880.30 N 11670.49W 18200.00 68.06 307.93 0.27 8023.20 15314.4 310.2 9894.55 N 11688.80W 18225.00 67.76 307.99 0.30 8032.60 15337.5 310.2 9908.80 N 11707.07W 18250.00 67.50 308.05 0.27 8042.12 15360.6 310.2 9923.04 N 11725.28W 18275.00 67.26 308.10 0.24 8051.74 15383.7 310.2 9937.27 N 11743.45W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTH STAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 18300.00 67.08 308.15 0.19 8061.44 15406.7 310.2 9951.49 N 11761.57W 18325.00 66.82 308.15 0.25 8071.22 15429.7 310.2 9965.70 N 11779.67W 18350.00 66.47 308.18 0.35 8081.13 15452.6 310.2 9979.89 N 11797.71 W 18375.00 66.20 308.23 0.28 8091.17 15475.5 310.2 9994.05 N 11815.71 W 18400.00 65.97 308.29 0.24 8101.30 15498.4 310.2 10008.20 N 11833.65W 18425.00 65.65 308.37 0.33 8111.54 15521.2 310.2 10022.34 N 11851.54W 18450.00 65.26 308.49 0.40 8121.93 15543.9 310.2 10036.47 N 11869.36W 18475.00 64.94 308.61 0.34 8132.46 15566.6 310.2 10050.61 N 11887.09W 18500.00 64.65 308.73 0.31 8143.10 15589.2 310.2 10064.74 N 11904.75W 18525.00 64.22 308.86 0.44 8153.89 15611.7 310.2 10078.87 N 11922.33W 18550.00 63.78 309.03 0.47 8164.85 15634.2 310.2 10092.99 N 11939.80W 18575.00 63.34 309.18 0.45 8175.98 15656.6 310.2 10107.11 N 11957.17W 18600.00 62.88 309.32 0.48 8187.29 15678.8 310.2 10121.22 N 11974.44W . 18625.00 62.52 309.48 0.39 8198.76 15701.1 310.2 10135.32 N 11991.61W 18650.00 62.14 309.65 0.41 8210.37 15723.2 310.2 10149.42 N 12008.68W 18675.00 61.75 309.81 0.42 8222.13 15745.3 310.2 10163.52 N 12025.64W 18700.00 61.43 309.92 0.33 8234.02 15767.2 310.2 10177.61 N 12042.52W 18725.00 61.11 310.02 0.33 8246.04 15789.2 310.2 10191.70 N 12059.32W 18750.00 60.79 310.14 0.34 8258.18 15811.0 310.2 10205.77 N 12076.05W 18775.00 60.39 310.23 0.41 8270.45 15832.8 310.2 10219.82 N 12092.69W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH D.OGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg.l feet feet deg. feet 25 ft. . 18800.00 59.97 310.27 0.43 8282.88 15854.5 310.2 10233.83 N 12109.24W 18825.00 59.56 310.29 0.41 8295.47 15876.1 310.2 10247.80 N 12125.72W 18850.00 59.14 310.32 0.42 8308.22 15897.6 310.2 10261. 71 N 12142.12W 18875.00 58.73 310.38 0.42 8321.12 15919.0 310.2 10275.57 N 12158.44W 18900.00 58.25 310.45 0.48 8334.19 15940.3 310.2 10289.39 N 12174.67W 18925.00 57.76 310.47 0.49 8347.43 15961.5 310.2 10303.14 N 12190.80W 18950.00 57.31 310.51 0.45 8360.85 15982.6 310.2 10316.84 N 12206.84W 18975.00 56.88 310.61 0.44 8374.43 16003.6 310.2 10330.49 N 12222.79W 19000.00 56.47 310.72 0.42 8388.17 16024.5 310.2 10344.10 N 12238.64W 19025.00 56.05 310.81 0.42 8402.05 16045.3 310.2 10357.67 N 12254.38W 19050.00 55.63 310.89 0.43 8416.09 16066.0 310.2 10371.20 N 12270.03W 19075.00 55.19 310.93 0.44 8430.28 16086.6 310.2 10384.68 N 12285.58W 19100.00 54.71 310.93 0.48 8444.64 16107.0 310.2 10398.09 N 12301.05W . 19125.00 54.18 310.93 0.53 8459.18 16127.4 310.2 10411.42 N 12316.41W 19150.00 53.65 310.94 0.52 8473.90 16147.6 310.2 10424.65 N 12331.67W 19175.00 53.18 310.98 0.48 8488.80 16167.6 310.2 10437.81 N 12346.84W 19200.00 52.77 311.05 0.41 8503.85 16187.6 310.2 10450.91 N 12361.90W 19225.00 52.46 311.12 0.32 8519.03 16207.5 310.2 10463.97 N 12376.87W 19250.00 52.09 311.20 0.38 8534.33 16227.2 310.2 10476.98 N 12391.76W 19275.00 51.60 311.31 0.50 8549.77 16246.9 310.2 10489.94 N 12406.53W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 19300.00 51.11 311.41 0.50 8565.39 16266.4 310.2 10502.85 N 12421.19W 19325.00 50.72 311.44 0.39 8581.15 16285.8 310.2 10515.68 N 12435.74W 19350.00 50.36 311.38 0.36 8597.04 16305.1 310.2 10528.45 N 12450.21 W 19375.00 50.03 311.33 0.33 8613.05 16324.3 310.2 10541.14 N 12464.63W 19400.00 49.75 311.29 0.29 8629.15 16343.4 310.2 10553.76 N 12478.99W 19425.00 49.45 311.19 0.30 8645.36 16362.4 310.2 10566.31 N 12493.31 W 19450.00 49.09 311.10 0.37 8661.67 16381.4 310.2 10578.78 N 12507.58W 19475.00 48.69 310.99 0.41 8678.10 16400.2 310.2 10591.14N 12521.78W 19500.00 48.35 310.84 0.36 8694.66 16419.0 310.2 10603.41 N 12535.94W 19525.00 48.04 310.73 0.31 8711.33 16437.6 310.2 10615.58 N 12550.05W 19550.00 47.68 310.64 0.37 8728.10 16456.1 310.2 10627.67 N 12564.11W 19575.00 47.31 310.56 0.38 8744.99 16474.6 310.2 10639.66 N 12578.10W 19600.00 46.97 310.44 0.35 8762.00 16492.9 310.2 10651.56 N 12592.03W . 19625.00 46.65 310.27 0.34 8779.11 16511.1 310.2 10663.36 N 12605.92W 19650.00 46.29 310.06 0.39 8796.33 16529.2 310.2 10675.05 N 12619.78W 19675.00 45.84 309.85 0.48 8813.67 16547.2 310.2 10686.61 N 12633.58W 19700.00 45.37 309.68 0.48 8831.16 16565.1 310.2 10698.04 N 12647.31 W 19725.00 44.99 309.55 0.40 8848.79 16582.8 310.2 10709.35 N 12660.97W 19750.00 44.59 309.42 0.41 8866.53 16600.4 310.2 10720.55 N 12674.56W 19775.00 44.23 309.29 0.37 8884.39 16617.9 310.2 10731.64 N 12688.09W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 19800.00 43.86 309.12 0.39 8902.36 16635.3 310.2 10742.62 N 12701.56W 19825.00 43.33 308.88 0.56 8920.46 16652.5 310.2 10753.47 N 12714.96W 19850.00 42.91 308.68 0.44 8938.71 16669.6 310.2 10764.17N 12728.28W 19875.00 42.53 308.48 0.40 8957.08 16686.6 310.2 10774.75 N 12741.54W 19900.00 42.06 308.25 0.49 8975.57 16703.4 310.2 10785.19 N 12754.73W 19925.00 41.62 308.01 0.47 8994.20 16720.1 310.2 10795.49 N 12767.84W 19950.00 41.25 307.76 0.40 9012.94 16736.6 310.2 10805.65 N 12780.90W 19975.00 41.06 307.53 0.25 9031. 76 16753.0 310.2 10815.70 N 12793.93W 20000.00 40.65 307.25 0.45 9050.67 16769.4 310.2 10825.63 N 12806.92W 20025.00 39.98 306.97 0.69 9069.73 16785.5 310.2 10835.39 N 12819.82W 20050.00 39.54 306.82 0.45 9088.95 16801.5 310.2 10844.99 N 12832.61 W 20075.00 39.15 306.75 0.39 9108.28 16817.3 310.2 10854.48 N 12845.31W 20100.00 38.61 306.70 0.54 9127.74 16833.0 310.2 10863.86 N 12857.89W . 20125.00 38.07 306.71 0.54 9147.35 16848.4 310.2 10873.13 N 12870.32W 20150.00 37.68 306.73 0.39 9167.08 16863.8 310.2 10882.31 N 12882.62W 20175.00 37.40 306.71 0.28 9186.91 16879.0 310.2 10891.42 N 12894.83W 20200.00 37.13 306.65 0.27 9206.80 16894.1 310.2 10900.46 N 12906.97W 20225.00 37.06 306.59 0.08 9226.74 16909.1 310.2 10909.46 N 12919.07W 20250.00 37.02 306.62 0.04 9246.70 16924.2 310.2 10918.44 N 12931.16W 20275.00 36.78 306.76 0.26 9266.69 16939.1 310.2 10927.40 N 12943.20W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. 0.35 9286.76 16954.0 310.2 10936.33 N 12955.13W . 20300.00 36.43 306.86 20325.00 36.03 306.81 0.40 9306.93 16968.8 310.2 10945.19 N 12966.96W 20350.00 35.64 306.67 0.40 9327.19 16983.4 310.2 10953.95 N 12978.69W 20375.00 35.22 306.51 0.43 9347.56 16997.9 310.2 10962.59 N 12990.33W 20400.00 34.77 306.33 0.46 9368.04 17012.2 310.2 10971.10 N 13001.86W 20425.00 34.33 306.10 0.46 9388.64 17026.3 310.2 10979.47 N 13013.30W 20450.00 33.88 305.82 0.48 9409.34 17040.3 310.2 10987.71 N 13024.65W 20475.00 33.50 305.58 0.40 9430.14 17054.1 310.1 10995.80 N 13035.91 W 20500.00 33.14 305.41 0.37 9451.03 17067.8 310.1 11003.77 N 13047.09W 20525.00 32.77 305.33 0.37 9472.00 17081.3 310.1 11011.65 N 13058.18W 20550.00 32.44 305.48 0.34 9493.06 17094.8 310.1 11019.45 N 13069.16W 20575.00 32.08 305.90 0.42 9514.21 17108.1 310.1 11027.23 N 13080.00W 20600.00 31.71 306.55 0.51 9535.43 17121.3 310.1 11035.04 N 13090.66W . 20625.00 31.33 307.27 0.53 9556.74 17134.3 310.1 11042.89 N 13101.11W 20650.00 31.00 307.91 0.47 9578.13 17147.2 310.1 11050.78 N 13111.36W 20675.00 30.69 308.60 0.47 9599.60 17160.0 310.1 11058.72 N 13121.42W 20700.00 30.35 309.40 0.53 9621.13 17172.7 310.1 11066.71 N 13131.29W 20725.00 30.00 310.22 0.54 9642.74 17185.3 310.1 11074.76 N 13140.95W 20750.00 29.60 311.01 0.56 9664.44 17197.7 310.1 11082.84 N 13150.38W 20775.00 29.24 311.75 0.51 9686.21 17210.0 310.1 11090.96 N 13159.59W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 20800.00 28.97 312.43 0.43 9708.06 17222.2 310.1 11099.11 N 13168.62W 20825.00 28.81 312.90 0.28 9729.94 17234.2 310.1 11107.30 N 13177.50W 20850.00 28.77 313.06 0.08 9751.85 17246.3 310.1 11115.50 N 13186.31 W 20875.00 28.78 313.00 0.03 9773.77 17258.3 310.1 11123.72 N 13195.11W 20900.00 28.81 312.94 0.04 9795.68 17270.3 310.1 11131.92 N 13203.92W 20925.00 28.82 312.99 0.02 9817.58 17282.3 310.1 11140.14 N 13212.74W 20950.00 28.81 313.07 0.04 9839.49 17294.4 310.1 11148.36 N 13221.54W 20975.00 28.83 313.15 0.05 9861.39 17306.4 310.1 11156.59 N 13230.34W 21000.00 28.70 313.12 0.14 9883.30 17318.4 310.1 11164.82 N 13239.12W 21025.00 28.27 312.90 0.45 9905.28 17330.3 310.1 11172.95 N 13247.84W 21050.00 27.64 312.64 0.64 9927.36 17342.0 310.1 11180.91 N 13256.44W 21075.00 27.08 312.40 0.57 9949.56 17353.5 310.1 11188.68 N 13264.91 W 21100.00 26.59 312.11 0.50 9971.87 17364.8 310.1 11196.27 N 13273.26W . 21125.00 26.04 311.82 0.56 9994.28 17375.9 310.1 11203.68 N 13281.50W 21150.00 25.52 311.50 0.54 10016.79 17386.7 310.2 11210.91 N 13289.63W 21175.00 24.99 311.10 0.56 10039.40 17397.4 310.2 11217.95N 13297.64W 21200.00 24.44 310.73 0.56 10062.11 17407.9 310.2 11224.79 N 13305.54W 21225.00 23.94 310.37 0.52 10084.92 17418.1 310.2 11231.45 N 13313.33W 21250.00 23.50 310.03 0.47 10107.80 17428.2 310.2 11237.94 N 13321.01 W 21275.00 23.12 309.90 0.38 10130.76 17438.0 310.2 11244.30 N 13328.59W A Gyrodata Directional Survey BP EXPLORA nON Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 f1. . 21300.00 22.72 309.84 0.41 10153.79 17447.8 310.2 11250.54 N 13336.06W 21325.00 22.33 309.77 0.39 10176.88 17457.4 310.2 11256.67 N 13343.42W 21350.00 21.96 309.71 0.37 10200.04 17466.8 310.2 11262.70 N 13350.67W 21375.00 21.53 309.54 0.44 10223.26 17476.0 310.2 11268.60 N 13357.80W 21400.00 21.07 309.26 0.46 10246.55 17485.1 310.2 11274.37 N 13364.82W 21425.00 20.57 309.09 0.51 10269.92 17494.0 310.2 11279.98 N 13371.71 W 21450.00 20.05 309.01 0.51 10293.36 17502.7 310.1 11285.45 N 13378.45W 21475.00 19.57 308.87 0.49 10316.88 17511.2 310.1 11290.78 N 13385.04W 21500.00 19.12 308.76 0.45 10340.47 17519.4 310.1 11295.97 N 13391.49W 21525.00 18.74 308.72 0.38 10364.12 17527.5 310.1 11301.04 N 13397.81W 21550.00 18.37 308.72 0.37 10387.82 17535.5 310.1 11306.02 N 13404.02W 21575.00 18.02 308.77 0.35 10411.57 17543.3 310.1 11310.90 N 13410.11 W 21600.00 17.67 308.86 0.35 10435.37 17551.0 310.1 11315.70 N 13416.08W . 21625.00 17.33 308.86 0.34 10459.21 17558.5 310.1 11320.42 N 13421.93W 21650.00 17.03 308.80 0.30 10483.09 17565.9 310.1 11325.05 N 13427.69W 21675.00 16.69 308.64 0.35 10507.02 17573.1 310.1 11329.59 N 13433.34W 21700.00 16.31 308.61 0.38 10530.99 17580.2 310.1 11334.02 N 13438.89W 21725.00 15.96 308.89 0.37 10555.00 17587.2 310.1 11338.37 N 13444.31 W 21750.00 15.61 309.04 0.35 10579.06 17594.0 310.1 11342.64 N 13449.60W 21775.00 15.26 309.06 0.34 10603.16 17600.6 310.1 11346.84 N 13454.76W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DOGLEG VERTICAL CLOSURE HORIZONTAL DEPTH SEVERITY DEPTH DIST. AZIMUTH COORDINATES feet deg. deg. deg./ feet feet deg. feet 25 ft. . 21800.00 14.98 309.18 0.29 10627.29 17607.1 310.1 11350.95 N 13459.82W 21825.00 14.67 309.29 0.31 10651.46 17613.5 310.1 11355.00 N 13464.78W 21850.00 14.37 309.29 0.30 10675.66 17619.8 310.1 11358.97 N 13469.63W 21875.00 14.11 309.20 0.26 10699.90 17625.9 310.1 11362.86 N 13474.39W 21900.00 13.81 309.07 0.30 10724.16 17632.0 310.1 11366.66 N 13479.07W 21925.00 13.52 308.99 0.29 10748.45 17637.9 310.1 11370.38 N 13483.65W 21950.00 13.24 309.06 0.28 10772.77 17643.7 310.1 11374.02 N 13488.15W 21975.00 12.92 309.25 0.32 10797.12 17649.3 310.1 11377.60 N 13492.54W 22000.00 12.86 309.39 0.07 10821.49 17654.9 310.1 11381.13 N 13496.85W 22025.00 13.59 308.79 0.74 10845.83 17660.6 310.1 11384.73 N 13501.29W 22050.00 15.17 307.07 1.64 10870.05 17666.8 310.1 11388.54 N 13506.19W 22075.00 16.73 305.10 1.66 10894.08 17673.7 310.1 11392.58 N 13511.74W 22100.00 17.36 303.96 0.71 10917.99 17680.9 310.1 11396.74 N 13517.78W . 22125.00 17.01 303.71 0.36 10941.87 17688.3 310.1 11400.85 N 13523.91W 22150.00 16.14 304.37 0.89 10965.83 17695.4 310.1 11404.84 N 13529.82W 22175.00 15.41 305.94 0.84 10989.89 17702.2 310.1 11408.75 N 13535.38W 22200.00 15.10 307.71 0.56 11014.01 17708.7 310.1 11412.69 N 13540.65W 22225.00 14.78 309.08 0.47 11038.16 17715.2 310.1 11416.69 N 13545.70W 22250.00 14.29 310.20 0.57 11062.36 17721.4 310.1 11420.69 N 13550.53W 22275.00 13.73 311.50 0.64 11086.62 17727.5 310.1 11424.65 N 13555.11 W A Gyrodata Directional Survey BP EXPLORATION Location: MAST TRUCK, Lease: NORTHSTAR Well: NS-21, Job Number: AK0604G 509 MEASURED IN C L AZIMUTH DEPTH feet deg. deg. DOGLEG SEVERITY deg./ 25 f1. VERTICAL CLOSURE DEPTH DIST. AZIMUTH feet feet deg. Final Station Closure: Distance: 17727.48 ft Az: 310.13 deg HORIZONTAL COORDINATES feet . . BP EXPLORATION Well: NORTH STAR Location: MAST TRUCK 70 60 50 z 0 40 1--1 ~ ^  . ~ z :t 1--1 .....J ::í u I z ...... 30 ;t 20 10 o I ~ o A .. ----- - --"---- , , I' j'- ,A '\1BOTTOM HOLE .. - - - ~ - - - - - - - - - - LQCATED _ _ ~ _. __ MD: 22275.75 NS-21 - - - ~ - _..._.~-_._._-- _._------~- ----.--- ______.J-_ -----.---.- '1 '~ , " ___ l____ _ ---,---- -- --- ------- -------------- -----.---..-- __'___ ________L I I .------ -.---.------ .------ __l-_________ _ I _ _ _ L --_.---~-. I _ _ __ _ L I I __ _ _ ~ _ _. _ _ _ __ L ._. _ _ ~ _ _ _ -_._---,---- _ _ L -- ------ ..._~ -----.-- .- - .-. - -- - - ---- -- --- _.L____ -----.---.- _____L___________ I I 5000 10000 15000 MEASURED DEPTH (ft) Inrun Gyrodata AK0604G_509 DEFINITIVE ----------------- I ---+----. I I --.----.----- ----------+---..-- I . ----~- ------- --- -----.-- __J..____ - - - - -"- ___________..L____ . . ~ -- .. .ì.- , I ~ 20000 25000 BP EXPLORATION Well: NORTH STAR Location: MAST TRUCK 340 330 320 310 I I- 300 -- :::> ~ ...... N <{ 290 280 270 260~-~ J NS-21 ~ '" .. - --------,~~ - -1-- -- - --- \\ "'~ -- - - - -. -- .t.- _._~------~._-- _A -----._- ---- o 5000 I -- ,- --< - - ---'- -------- In ru n Gyrodata AK0604G_509 DEFINITIVE ---+---,._~---- - I .~--------+--_._- I I ·_------I---------------------~------------------- -~-._-----_.- , ----·-------T---- _1___________ _____1._____ ---- --------------------------------- ------- ···----1---- -----------~" , ------------------- - - - -- ---~-- -- - - - -"-' I I I "1 - -. - - - .- -- - - - - - - . ---------- -t------ -------- -- -..¡..- - - -- - - - I" I I ------T----- - -- - ---------- J_._______ ---,-.----.- -. - - - --- I _ _ _ _ -1__ I -. ------.----. __.1___ ----1--------------------- ~------------ .------.----- -- -'I I .~-------- - ----~---------------- 10000 15000 MEASURED DEPTH (ft) -----~---------- ------~---- I I I I I I I I I , -~------ --------------T---- 20000 25000 BP EXPLORATION Well: NORTH STAR Location: MAST TRUCK 11000 10000 9000 8000 ~ q: '-'" 7000 I f- a.. w o .....J « u ....... f- a::: w > 6000 5000 - 4000 3000 2000 1000 NS-21 _ L , - __ - - - _1- _ _ _ _ ~ -- - .- -- ..- - -- ~ - - - - -. - "- ~ - -- - ..~ - - - - - - - - .__ - - _~ __I- I - -- - - -------.--- ------- -------- -.-- - - - ---- ------- --,..--- - ----- -- -- ~ - - - -- - - - - - -- - - -- --.-------------- - -- - - .- -. _______1____________________ -------------------- -- 1"'- - "- - - - -- - ---".._--- In ru n Gyrodata AK0604G 509 DEFINITIVE ------- OTTOrvrROL~ -- LOCATED , MD: 22275."75 -------------------- I I -------.--------- , , --------------------~----4IIÞ ; ..-----------.--- ----·------1----- - - - -1- - - .- - - - "- - - - , , I I ---------. ---,---- ------·----T-- I I I ---------- I -- ... -. - - - - - -1- - -" - -- -----r---- - - - -1- - - - - - -- I ---~------------------- ------+- I I --------------+---- I I , 4IIÞ -- -- - -1- - - - - - - -- --------- ----._-- +-- , - --_._-~.---I- I I I _ _ __ _ _ _ _ _. _ _ _ __. ..L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.. _ _ _;_ _ _ _ ._ _ _ _ __ ~ __ _ _ ~ _ _ _ __ _ __. _ --.!. _. _ _ _ , -. - - - - - - o o 5000 - - _1- _ __ --------- , I _ _ _ _ _ _ _ _ _ _ _ _ _ ._ _ __ _._ _ _1_ __ _ _ _ _ __ _ _ _ ..:.. _ _ _ _ _. _ _ _ _ __ ...L _ _ _ _ I I I I I ... -- - - - - 10000 15000 MEASURED DEPTH (ft) 20000 25000 BP EXPLORATION Well: NORTH STAR Location: MAST TRUCK 2.50 NS-21 In ru n Gyrodata AK0604G 509 DEFINITIVE 2.25 2.00 1.75 ~ .:t= L/") ~ 1.50 en Q) -0 '-' >- I- ë2 1.25 w > w (j) ~ 1.00 ....J 19 o o 0.75 0.50 0.25 0.00 ------- , -----------------1------ ------------___~-_- --_______________+ , , , , ------ --- , _____L_____________________I__ , , , _ J. _ __ __ , , ____1______ __;uu~______ -------- ---- - .- .- -- - - , - ï _+~u_. , , -------------------------------------- ------ .-------. ------_._-- __ ._.'_ __ - __ __ n' , ",-------.- ----------·--T---- --1------ , --.- ---- ... 1-- - - -- -- -- - - ----------.---- Jo. ~- -- -.-.- -- - .- -- -- - +- -- -. -- -- - -. -- .,~ - -- - - - - -- - - -. -- i- - .- -- - - -- - - ------------ --1----- ---~------------+---- . ' .. .,.. - -. t_~,,~~ -1- - - -" -~- .i i1ilj!4!. Å ...~J i~ ...t - ~~ J ~U~ti~. 1~~ i!~ !I,;,.! ~ \Þ:'l ~!~' t+ - ' ..' -~,~-- ~.. tjj!"" t' " i!~!I: ,~f , . ,.! (!1¡4ii' A - ~ - -1.'- - I~ "~! ' ~ -- -.------------.-,---- ,------- --- . ----______I______---------------~-------- ,I~-----------~---- I ji I , , " iii' j:i¡ ~ - ~~ -\. -- ----- -,--- ---.------ .. - - - - -- - -- -- -- -r -. -- - -- -. -- - -- - -------------,- --.--..--------. - t , '. 4 & J o 5000 25000 10000 15000 MEASURED DEPTH (ft) 20000 BP EXPLORATION Well: NORTH STAR Location: MAST TRUCK 11000 10000 9000 8000 7000 ........, .:e '--'" 19 6000 z ...... I l- e( 5000 0 z 4000 3000 -- 2000 1000 0 NS-21 In ru n Gyrodata AK0604G_509 DEFINITIVE -- - -- - _. - -- ___.____________L___ I --.--- --.--------- - _. _. - - _. .n _. __ _' _ _ _ ._ _ _m____ ______ BOTTOM HOl LOCATED "--------..----'.. --- MD: 22275.75 I ---~------------------- - - -I-- I ---- --------.-----.- --- --- ------- ---------- ------- ---_.~---- ---.----1--- ----,--- -------.-- "" -- - -- -- --.---------- __n···__ _._ __ . - -------1-----·_- -__··___________1________ ___________ _+ ------ -.-- _.------ - - -- -- -" - - ,.- - -- - - 1- - - ---------- -------- ------------------ _____,_ - -1-.-....-- ___ - -_._-.--- -.---- -----____________k ------------------ .- - -- -- .- - - I - - - '-, - - -------------T---------- ------__ -- .. - - --- __n'____' L .___ ___.___.__ ___._ ,1 -------~ -----------'---------------- ------------------ ---- ----.-- -- - - .. - - -- - - -- - - - -. -------- _1______------ ----------,----- __ -I _ _ ~ __ ._ _ _ -------I-·--~- ----.----- - ----'--.---- ----,------ I -ï·----- -------- -12500 -10000 -7500 EASTING (ft) -5000 -2500 o ... bp e e ,\t~~t/. ......~.. "~~. ~...... ~. l2 ...~ ~....... dvO,*~·· a;.. t Q ·'Ø.~~\" BP Exploration (Alaska) Inc. 900 East Benson Boulevard P. O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 July 7, 2004 Winton Aubert Alaska Oil & Gas Gònservation Commission 333 West ih'Avenue Suite 100 Anchorage, AK 99501 Dear Winton: Re: Sundry Notice for NS21 to Acidize (Ivishak) BP Exploration Alaska, Inc. proposes to acidize the NS21 well. This well has exhibited a decline and analysis of formation water indicates the formation of CaC03 scale is likely. Last summer's acidizing campaign at Northstar was very successful. The procedure includes the following major steps: · Pickle the tubing · Bullhead HCI based acid treatment (which includes scale inhibitor) · Flowback Sincerely, ~~~~~ Michael J. Francis, P.E. Senior Petroleum Engineer BPXA, ACT, Northstar ORIGI~JAL itJé¡!t 7/14/z.-o()f e STATE OF ALASKA e Il~ 7//9-/9- ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVAL 20 AAC 25.280 Stratigraphic 0 Service 0 9. Well Name and NumbEjJ: NS21 / 10. Field/Pool(s): Northstar Field I Northstar Oil Pool PRESENT WELL CONDITION SUMMARY I Effective Depth MD (ft): I Effective Depth TVD (ft): 22257 11018.0 S~ MD nD 1. Type of Request: D D Abandon Suspend Alter Casing D Repair Well D Change Approved Program D Pull Tubing D Operation Shutdown 0 Plug Perforations 0 Perforate New Pool D 4. Current Well Class: 2. Operator Name: BP Exploration (Alaska), Inc. Development 00 3. Address: P.O. Box 196612 Anchorage, Ak 99519-6612 7. KB Elevation (ft): 56.19 KB 8. Property Designation: ADL-312798 11. Total Depth MD (ft): 22293 Casing ITotal Depth TVD (ft): 11109.1 Length PerforateD WaiverD StimulateOO Time ExtensionD Re-enter Suspended WellD 5. Permit to Drill Number: ,.,2Ø2-2180 / Annular Disposal D OtherD Exploratory 0 6. API Number ,,/ 50-029-23126-00-00 Plugs (md): None Burst Junk (md): None Collapse top bottom top 19949 21942 21765 22259 43 12158 44 4606 I Tubing Size: 4.5 " 12.6 # Packers and SSSV MD (ft): Liner 1993 7" 26# L-80 Liner 494 4·1/2" 12.6# 13Cr80 Production 12115 9-5/8" 47# L-80 Surface 4562 13-3/8" 68# L-80 Perforation Depth MD (ft): I Perforation Depth TVD (ft): 22184 - 22264 11003.4 - 11080.9 Packers and SSSV Type: 4-1/2" Baker 5-3 Perm Packer 4-1/2" Baker ZXP Packer 4-112" TRM-4E SSV 7" Liner Top Packer 12. Attachments: Description Summary of Proposal ŒI bottom 10770.1 7240 11076.1 8430 5864.7 6870 3189.7 4930 I Tubing Grade: Tubing MD (ft): 13Cr80 41- 21766 9008.9 10598.3 43.0 44.0 5410 7500 4760 2270 21721 21765 988 19949 Detailed Operations Program D BOP Sketch D 13. Well Class after proposed work: ExploratoryD DevelopmentŒl Service D 14. Estimated Date for Commencing Operation: 16. Verbal Approval: Commission Representative: Date: 15. Well Status after proposed work: Oil Œ] GasD PluggedD AbandonedD WAG D GINJD WINJD WDSPLD Prepared by Garry Catron 564-4657. August 1, 2004 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Printed Name Signature Michael Francis ~~~~~ (,6. Commission Use Only Conditions of approval: Notify Commission so that a representative may witness BOP TestD Mechanciallntegrity Test D Contact Michael Francis Title Phone Petroleum Engineer 564-4240 7/8/04 Sundry Number: ..$e;C¡: ;)-?~ Location Clearance D RBOMS SfL Jut 2 1 ~~~~~~~~~'ON DaJe f/¡j PI cý Other: Subsequ OR\ Form 10-403 Revised 06/2004 SUBMIT IN DUPLICATE ~ TREE: ABB-VGI 5 1/S" 5ksi a WELLHEAD: ABB-VGI 13-5/S" ., Multibowl5ksi NS21 13 3/S", 6S#/ft, L-SO, BTC @ 4606' MD ~ 41/2", 12.6#/ft, 13-Cr, Vam-Ace TUBING ID: 3.95S" . CAPACITY: 0.01522 BBLlFT 9-5/S" 47# L-80 BTM-C @ 20150' MD 6 4.5" X NIPPLE, @ 21699' MD 3.S13" ID 4.5" X NIPPLE, @ 21744' MD ~ 3.S13" ID 4.5" XN NIPPLE, @ 21755' MD 3.725" ID 4.5" WLEG, @ 21766' MD ---E 3.S5"ID 7", 26#/ft L-SO, Hydril 521 @ 21945' MD -. FEFfæ41tCNS!..M#<W Æf'lCG: A:Clo¡¡ (&'1104) ANJ.EA T TŒ'ÆW: N.i!.e. Re1er to iWductoo œ for h\slori:a! pô!rf data indial F!;¡rf . O1arge: ~Nørj¢t I--M< pJ4t$ H$Q F!;¡nW<ltoo' 27"; HIe: 036": Alase: 00 œg I ~E SW MERVAUvÐ INTm.,lAl1VD Cp1IS:;:: I D\1E I t~ß8 6 22184'-222$4' 11004"11002'. C¡::I1 ...$iI~ PBTD @ 22257' MD TD @ 22261' MD ~ DATE 11/12/02 02/25/04 06/21/04 REV. BY JAS JAS EMF COMMENTS '"NS21 Proposed NS21 Proposed Add Perf . ~IGINAL KB. ELEV = 56' ~B-BF. ELEV = 40.1' CB. ELEV = 15.9' 4112" TRM-4E SSSV @ 9SS' MD, 9S5' TVD - 3.S12" ID 6.SPPG DIESEL FREEZE PROTECTION AT +1- 4022' TVD (6S36'MD) It. 41/2" GLM @ 4504' TVD (S13S' MD) wI 4.62" ID 41/2" GLM @ 6503' TVD (1371S'MD) wI 4.62" ID M - 7" LINER TOP @ 19949' MD ~ L- I 4.5" Fiber Optic Transducer @ 21703' MDelm - 3.95S" ID ~ _ 7" PACKER,13 Cr@ 21721' MD fL- ~ 4.5" LINER TOP @ 21765' MD It. ~ 4.5",12.6#, 13Cr Vam Ace Northstar WF' , : NS21 API NO: 50-029-23126-00 BP Exploration (Alaska) . . Date: 05-11-2004 Transmittal Number: #92649 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the Petrotechnical Data Center at (907) 564-4091 or by e-mailingtojohnsojh@bp.com Top SW Name Date Contractor Log Run Depth NS32 04-29-2004 SPERRY 3 201 ;0>- J>J )) r/ç NS21 04-18-2004 SPERRY ~ù).Y/f tI I))'/f/ 6 4179 Bottom Depth Log Type 6685.24 MUDLOG; FORMATION EVALUATION; LITHOLOGY; (2" MD/2" TVD COLOR MUDLOGS;) END OF WELL REPORT; CD ROM INCLUDED; 11206.60 MUDLOG; FORMATION EVALUATION; LITHOLOGY; (2" MD/2" TVD COLOR MUDLOGS;) END OF WELL REPORT; CD ROM INCLUDED; Please2f~~£rn Q ~i this trafL(;!n ) d ð ~/ Thank You, James H. Johnson Petrotechnical Data Center Attn: Esther Fueg MB3-6 Attn: Ken Lemley MB3-6 Attn: Howard Okland (AOGCC) Attn: Jason Smith (Murphy Exploration Alaska), Inc Attn: Kristin Dirks (DNR) Attn: Doug Choromanski (MMS) Petrotechnical Data Center LR2-1 900 E. Benson Blvd. PO Box ]96612 Anchorage, AK 99519-6612 RE: Northstar Completion Delays . . Subject: RE: Northstar Completion Delays Date: Mon, 17 Mar 2003 12:50:49 -0600 From: "Hernandez, Floyd" <HernanFl@BP.com> To: "'Winton Aubert'" <Winton_Aubert@admin.state.ak.us> Winton, The wells that could potentially have deferred completions will be NS16, NS19, NS23, NS20, & NS21. ~ '- ." t. - '2-hr Just to let you know, I'm planning on suspending these wells with seawater and a diesel cap (1700'). This puts us in an under balance situations, except that before the well is switch over to seawater, a positive pressure test to 4370 psi will be conducted. After the switching to seawater, a negative test or inflow test will be performed for 30 minutes. A tubing hanger and BPV will also be installed and tested to 4200 psi. Any issues with how we suspend these wells? They are basically the same as what we have been doing on the previous Top Sag suspensions. Thanks, Floyd Hernandez Senior Drilling Engineer Northstar Development (907) 564-5960 work (907) 240-8056 cell hernanf1@bp.com -----Original Message----- From: Winton Aubert [mailto:Winton Aubert@admin.state.ak.us] Sent: Friday, March 14, 2003 6:50 AM To: Hernandez, Floyd Subject: Re: Northstar Completion Delays Floyd, No Sundries are necessary. Let me know by E-mail which wells are involved so I can update our files. Thanks, Winton "Hernandez, Floyd" wrote: > Winton, > > To be able to drill and case off as many wells thru the reservoir section > prior to the beginning of the Seasonal Drilling Restriction which begin on > June 1st, we have decided to delay running the tubing completions on wells > until after June 1st. Do you need a Sundry Notice or can we still utilize > the Original Drilling Permit which discussed "Operation Shutdown" of the > wells after top setting the Sag River. > > Thanks, > Floyd Hernandez > Senior Drilling Engineer > Northstar Development > (907) 564-5960 work > (907) 240-8056 cell > hernanf1®bp.com Perforation intervals for Northstar wells . . Subject: Perforation intervals for Northstar wells Date: Fri, 17 Jan 2003 11 :44:09 -0600 From: "Sherritt, Allen" <SherriJA@BP.com> To: "Winton Aubert (E-mail)..<winton_aubert@admin.state.ak.us> CC: "Francis, Michael J" <Michael.Francis@BP.com>, "Hernandez, Floyd" <HernanFl@BP.com> Winton, As per our conversation, the following Northstar wells do not have a reference to perforation intervals included in the drilling permits. NS18 NS22 NS06 NS20 NS16 NS21 µ'7.. - 1/\ -f NS19 They all will be perforated within the Ivishak interval: "Perforate -140' Ivishak formation between the Top Ivishak and OWC." "Perforation interval will be based on PE recommendation after completion of well." The actual perforation depths will be provided in the final well completion reports. If you need any further information, give me a shout. Thanks, Allen Sherritt BP Northstar Operations Drilling Engineer * (907) 564-5204 (Direct) * (907) 240-8070 (Mobile) * sherrija@bp.com * (907) 564-5200 (Fax) * MB 3-6 / 383B . . Date: 12-02-2002 Transmittal #92568 BPXA WELL DATA TRANSMITTAL Enclosed are the materials listed below. If you have any questions, please contact me in the PDC at 564-4091. SW Name NS21 Date 11-18-2002 Contractor ANA Log Run 1 Bottom Top Depth Depth o 4621 Log Type MWD SURVEY REPORT; (HARDCOPY) MWD SURVEY REPORT; (DISKETTE) SURVEY REPORT GEODETIC; MWD SURVEY REPORT; (HARDCOPY) MWD SURVEY REPORT; (DISKETTE) SURVEY REPORT GEODETIC; ~ò1~ NS19 11-13-2002 ANA 1 o 13500 ~.al)Î ease Sign and Return one copy of this transmittal. Thank You, James H. Johnson Petrotechnical Data Center ÒtéL~~~ ~~~~ ~~·Ü ~ ~ Attn: Lisa Weepie (AOGCC) Attn: Doug Choromanski (MMS) Attn: Tim Ryherd (DNR) RECEIVE:O DEC 0 2~ 2002 Alaska & Gas COí1Z,. Ccmmi88ion Anchorage Petrotechnical Data Center LR2-1 900 E. Benson Blvd. PO Box 196612 Anchorage, AK 99519-6612 NS21 Suspension Permit # 202-218 . . Subject: NS21 Suspension Permit # 292-218 Date: Mon, 18 Nov 200214: 15:02 -0600 From: "Sherritt, Allen" <SherriJA@BP.com> To: "Winton Aubert (E-mail)..<winton_aubert@admin.state.ak.us> CC: "Holt, Barbara M" <HoltBM@BP.com>, "Schultz, Mikel" <Mikel.Schultz@BP.com>, "Hernandez, Floyd" <HernanFl@BP.com> Winton, As per our conversation, the following is an outline of the suspension procedure for NS21 surface hole. 5. Displace cement,with 9.4 ppg brine. Bump plug and hold 500 psi for casing integrity. RIH with OEDP to -1000' MD and circulate 6.8 ppg diesel to freeze protect the well to surface, (volume sufficient to leave 200' MD of diesel freeze protect, -30 bbls.) 6. Shut down and monitor the well for a minimum of 30 minutes. POOH 7. ND diverter I riser system and NU casing I multi-bowl wellhead. Prepare for "Operations Shutdown. (June 1st Seasonal Drilling Restriction)" 8. Install 4 W' tubing hanger and test to 500 psi. 9. Set the TWC. NU Tree. Test the tubing head adapter and tree to 500 psi. 10. Install (dry rod in) BPV and test. Ensure all valves are closed. RD and move off well. Prior to drilling out the 13 3/8" casing, å pressure test will be performed to -3500 psi wi 9.3 ppg mud, (70% of burst.) If you have any questions or concerns, please contact me at the numbers provided. Thanks, Allen Sherritt BP Northstar Operations Drilling Engineer * (907) 564-5204 (Direct) * (907) 240-8070 (Mobile) * sherrija@bp.com * (907) 564-5200 (Fax) * MB 3-6 I 383B . ~~!Æ~E (ffi F fÆ~!Æ~~!Æ AI1ASIiA. OIL AlVD GAS CONSERVATION COMMISSION Floyd Hernandez Senior Drilling Engineer BP Exploration (Alaska) Inc. P. O. Box 196612 Anchorage, AK 99519-6612 . / / / TONY KNOWLES, GOVERNOR 333 W. 7'" AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Re: Northstar Unit NS 21 BP Exploration (Alaska) Inc. Pennit No: 202-218 Surface Location: 1249' NSL, 646' WEL, SEC. 11, TI3N, R13E, UM Bottomhole Location: 2388' NSL, 4103' WEL, SEC. 33, TI4N, R13E, UM Dear Mr. Hernandez: Enclosed is the approved application for pennit to drill the above referenced development wel1. This pennit to drill does not exempt you from obtaining additional pennits or approvals required by law from other governmental agencies, and does not authorize conducting drilling operations until all other required pennits and approvals have been issued. In addition, the Commission reserves the right to withdraw the pennit in the event it was erroneously issued. Operations must be conducted in accordance with AS 31.05 and Title 20, Chapter 25 of the Alaska Administrative Code unless the Commission specifically authorizes a variance. Failure to comply with an applicable provision of AS 31.05, Title 20, Chapter 25 of the Alaska Administrative Code, or a Commission order, or the tenns and conditions of this pennit may result in the revocation or suspension of the pennit. Please provide at least twenty-four (24) hours notice for a representative of the Commission to witness any required test. Contact the Commission's North Slope petroleum field inspector at 659-3607 (pager). Sincerely, ~(/~ Michael L. Bill Commissioner BY ORDER OF THE COMMISSION DATED this 13~day of November, 2002 cc: Department ofFish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/o encl. \'k71r- il' õl v 2... 12. Distance to nearest property line 113. Distance to nearest well / ADL 312799, 144' MD NS20is 10.83' away at 350' MD 16. To be completed for deviated wells Kick Off Depth 250' MD Maximum Hole Angle 18. Casin~ Program Specifications Size Casina Weiaht Grade Couclina 20" 169# X-56 WELD 13-3/8" 68# L-80 BTC 9-518" 47# L-80 BTC-Mod 7" 26# L-80 Hydril 521 4-1/2" 12.6# 13Cr Vam Ace Hole 20" 16" 12-1/4" 8-112" 6-1/8" .. STATE OF ALASKA . ALASKA. AND GAS CONSERVATION COMM!'SION PERMIT TO DRILL 20 AAC 25.005 \1 b. Type of well 0 Exploratory 0 Stratigraphic Test III Development Oil o Service 0 Development Gas 0 Single Zone 0 Multiple Zone 5. Datum Elevation (DF or KB) 10. Field and Pool Planned KBE = 56' Northstar Unit 6. Property Designation ADL 312798 7. Unit or Property Name Northstar Unit 8. Well Number / NS21 9. Approximate spud date 11/13/02/ Amount $200,000.00 14. Number of acres in property 15. Proposed depth (MD and TVD) 2560 22107' MD 111156' TVD o 17. Anticipated pressure {~20 MC 25.035 (e) (2)} 65.71 Maximum surface 3844 psig, At total depth (TVD) 11101' I 5176 psig Setting Depth TOD Botom MD TVD MD TVD Surface Surface 201' 201' Driven Surface Surface 5322' 3206' 827 sx PF 'L', 466 sx Class 'G' / / Surface Surface 19701' 9396' 1313 sx Econolite, 723 sx Class 'G' / 19551' 9281' 21726' 10877' 426 sx Class 'G' / 21576' 10767' 22107' 11156' 76 sx Class 'G' / 11. Type Bond (See 20 AAC 25.025) 1 a. Type of work III Drill 0 Redrill ORe-Entry 0 Deepen 2. Name of Operator BP Exploration (Alaska) Inc. 3. Address P.O. Box 196612, Anchorage, Alaska 99519-6612 4. Location of well at surface 1249' NSL, 646' WEL, SEC. 11, T13N, R13E, UM At top of productive interval 2203' NSL, 3882' WEL, SEC. 33, T14N, R13E, UM At total depth 2388' NSL, 4103' WEL, SEC.33, T14N, R13E, UM Number 2S100302630-277 Lenath 201' 5322' 19701' 2175' 531' Quantitv of Cement (include staae data) 19. To be completed for Redrill, Re-entry, and Deepen Operations. Present well condition summary Total depth: measured feet Plugs (measured) true vertical feet Effective depth: measured feet Junk (measured) true vertical feet Casing Structural Conductor Surface Intermediate Production Liner Length Size Cemented MD TVD Perforation depth: measured RECEIVED NOV 0 6 2002 Alaska Oil & Gas Qons. Commission - Anchorage true vertical 20. Attachments III Filing Fee 0 Property Plat 0 BOP Sketch 0 Diverter Sketch III Drilling Program III Drilling Fluid Program 0 Time vs Depth Plot 0 Refraction Analysis 0 Seabed Report 0 20 AAC 25.050 Requirements Contact Engineer NameINumber: Allen Sherritt, 564-5204 Prepared By NamelNumber: Sondra Stewman, 564-4750 21. I hereby certify that the f~reaoin AL.LfZiJ ý/t;)œm I"(:J/i. Signed Floyd Hernandez best of my knowledge Title Senior Drilling Engineer Permit Number API Number APP/r/~Yil'P~','7,. See cover letter .z <::) ,"7 - 2. I fI 50- 0 2. « - :;2... 3 I 2 G I ¡ 7; I() 7\ for other reQuirements Conditions of Approval: Samples Required 0 Yes 181 No Mud Log Required BYes 0 No Hydrogen Sulfide Measures 0 Yes iii No Directional Survey Required fiJ Yes 0 No Required Working Pressure. for BOPE 02K D3K D4K 85K q 10K ..LD 15K _ 0 3.5K psi fo~ CT~ Other: Test- tD Pe 10 <¡-foo f{ I ' t4, 'lc Ml7j).o~C;(h tz.1../ &,v'4oý rt'.-, V'r'~,.u'.,d- V<Jçu. I/e , Approved By onf()lNAL S\~NED BY Commissioner. ~:e o~~~::ssion Date / I //10 ;;¿ Form 10-401 Rev. 12-01-85 M L. Bi\\ ' '\; '," /. \ L Submit In t.i~licate bp . . BP Exploration Alaska Inc. To: Winton Aubert - AOGCC Date: November 6, 2002 From: Allen Sherritt Northstar Operations Drilling Engineer Subject: NS21 Application for Drilling Permit Mr. Aubert, / NS21 is currently scheduled for Nabors 33E on November 13th, 2002. I A Diverter waiver is also requested on NS21. To date, BP has drilled eighteen development wells through the Northstar upper strata-graphic intervals and has not experienced any difficulty with shallow gas. Seventeen surface holes have been drilled and cemented to a common depth of approximately 3,170' TVDss depth, (-150' TVD below the top of the SV6), with one well extending into the SVJ -3280' TVDss. Well mud logs and seismic data do not indicate the presence of a shallow gas hazard. NS21 will perform an "Operation Shutdown" duri~the 2002 Seasonal Drilling Restriction period. A Sundry for the Operation Shutdown will not be submitted, as the operations are covered in the ADP procedure. Please find attached the NS21 Well Plan Summary, directional plan and proposed completion diagram. If you should have any questions or concerns, please contact me @ 564-5204. Allen Sherritt BP Northstar Operations Drilling Engineer 564-5204 . . NS21 SUMMARY DRILLING OPERATIONS Pre-Riq Work: 1. Set 20" conductor and weld an ABB Vetco landing ring for the ABB Vetco Multibowl Wellhead on the conductor. (Already performed.) 2. Install 7' x 7' cellar and polyshield same. (Already performed.) Riq Operations: /" 1. MIRU Nabors 33E. 2. Nipple up and function test 21-1/4" diverter system, if require!" NOTE: A diverter dispensation has been requested. Confirm dispensation decision with the Drilling Engineer. A 07 Diverter Drill will be conducted prior to spud. 3. MU 16" drilling assembly with MWD/GR and directionally drill surface hole to +/-150' TVD below the . top of the SV6 marker at approximately 4951' MD. Surface casing point has been picked at 5322'''/ MD. POOH. / 4. Run 13-3/8", 68# surface casing. Cement the casing to surface in 1 stage. No TAM port collar will be . run. The risk of leak, and potential loss of hole, far outweighs the likelihood of not getting cement to ./ surface in one stage. / 5. RIH with RTTS (1000' DP below) and test the 13-3/8" casing to 3500 psi with 9.3-ppg mud for 30 min. This test pressure may change based on actual mud weight in the hole. POOH. 6. RIH with 12 %" mill tooth bit on DP to the 13 3/8" landing collar. Circulate to clean 8.65 ppg seawater using spacers as per Baroid recommendation. 7. Shut down and monitor the well for a minimum of 30 minutes. 8. POOH to 100' below the base of permafrost and circulate 6.8 ppg diesel to freeze protect the well to surface. POOH. 9. NO diverter / riser system and NU casing / multi-bowl wellhead. 10. Prepare for "Operations Shutdown. (June 1s~asonal Drilling Restriction)" 11. Install 4 W' tubing hanger and test to 4200 psi. 12. Set the TWC. NU Tree. Test the tubing head adapter and tree to 5000 psi. 13. Install (dry rod in) BPV and test. Ensure all valves are closed. RD and move off well. 14. Prepare to re-enter well post "Seasonal Drilling Restriction." / 15. MIRU Nabors 33E. / 16. Pull BPV. Install TWC. NO dry hole tree. NU BOPE and test to 250/4800 psi. / 17. MU 12-1/4" directional assembly. RIH to float collar. Test the 13-3/8" casing to 3500 psi with 9.3-ppg mud for 30 min. This test pressure may change based on actual mud weight in the hole. 18. Drill out remaining cement. Drill 20' of new formation below 13-3/8" shoe and perform FIT to a 12.5 ppg EMW. (FIT/LOT procedure on file with AOGCC). 19. Drill 12-1/4" intermediate hole to casing point (approxi~a~,701' MD) at the top of the Miluveach. ./ Minimum mud weight of 9.6 ppg at the top of HRZ and~pg at the top of Kuparuk. POOH. (No logs will be run, unless the Kuparuk is oil bearing.)· /' 20. Run 9-5/8", 47# intermediate casing. Cement the casing to the top of the SV2 sand in a single stage. Set the 9 5/8" pack off. Perform a down-squeeze on the 9-5/8" x 13-3/8" annulus with 1 annular volume of mud upon installing and testing the packoff. Down-squeeze diesel to 2000' TVD for freeze protection after WOC. .- 21. MU 8-1/2" directional assembly and RIH to float collar. Pressure-test the 9-5/8" casing to 4100 psi with 10.3 ppg mud for 30 min. This test pressure may change based on the actual mud weight in the hole. 22. Drill out remaining cement. Drill 20' of new formation below 9-5/8" shoe and perform a FIT to a 14.0 ppg EMW, (FIT/LOT procedure on file with AOGCC). NS21 Permit to Drill . . /',) 23. Weight up to minimum)'2;.!>1>pg prior to drilling ahead. Drill the drilling liner hole to the top of the Sag at approximately 21 ,6~MD. Interme,9iate casing point has been picked at 21,726' MD. POOH. 24. Run and cement a 7" 26# drilling liner. Set the liner hanger and liner top packer. Circulate excess cement from well bore. 25. POOH and lay down liner running tools. Test 9 5/8" x 7" liner lap to 3450 psi for 30 mins 26. RIH w/ 6-1/8" directional assembly. Displace to 9.1 ppg mud. Clean out 7' liner to the landing collar. 27. Drill out remaining cement. Drill 20' of new formation below 7" shoe with 9.1ppg mud. Perform a Formation Integrity test to 11.5 ppg. (FIT/LOT procedure on file".with AOGCC). / 28. Drill 6-1/8" production interval to the proposed TD at 22,107' MD. Increase mud weight to 9.3 ppg prior to POOH. 29. Make a clean out run, if required, and cond~on the hole for a liner. POOH. 30. Run and cement the 4-1/2" 12.6# 13Cr liner. Set the liner hanger and liner top packer. Circulate min. 1 bottoms up to remove excess cement with 9.3 ppg viscosified brine. 31. Circulate to clean seawater (less than 80 NTU's) using spacers as per Baroid recommendation. 32. Shut down and monitor the well for a minimum of 30 minutes (negative test on liner top). --- 33. POOH. Close the blind rams and pressure-test the liner lap to 3750 psi with 8.65 ppg seawater in the well for 30 minutes. prepare to run the 4 W' completion. No slick line work will be done. '" 34. Run the 4 W', 13Cr Vam Ace completion assembly with CIDRA fiber optics. The fiber optic cable will be run from packer setting depth to surface. 35. RIH to packer setting depth. Dual SSSV control lines will be run from the SVLN at +/- 1000' TVD to surface. 36. Run space out pups and terminate the 2 - 0.25" control lines and 0.25" fiber optic line. All lines will be secured using collar cable clamps. Pressure test the control lines and tubing hanger seals. Function- test the fiber optic line. 37. Pump corrosion inhibitor and heated diesel down the 4 W' x 9 %" annulus equivalent to the annulus capacity plus tubing capacity to a depth of 4000' TVD (7253' MD). RU the U-tubing manifold. 38. Drop ball and rod to set packer. Increase the tubing pressure to 4200 psi (maximum anticipated surface pressure) with 8.65;ppg completion fluid and hold for 30 minutes. Monitor tubing pressure for leaks. Record on chart. / 39. Bleed tubing to 3000 psi and maintain during MIT. Pressure test annulus to 4200 psi (maximum anticipated surface pressure) with 8.65-ppg-completion fluid for mechanical integrity test (MIT). Monitor tubing pressure for leaks. Maintain pressure for 30 minutes and record as annulus test on chart. Email or fax chart to Drilling Engineer. 40. Bleed down the annulus to 3500 psi. Bleed down the tubing to 0 psi. This will shear the RP valve in the lower most GLM. 41. Bleed off annulus to 0 psi. Allow fluids to U-tube from the annulus into the tubing through the lower GLM, -9685' MD. 42. Set the TWC. ND BOP's. NU Tree. Test the tubing head adapter and tree to 5000 psi. /" 43. Install and test (dry rod in) BPV. Ensure all valves are closed. RD and move off well. Estimated Spud Date: November 13th, 2002 Allen Sherritt Operations Drilling Engineer 564-5204 2 NS21 Permit to Drill . . NS21 WELL PLAN SUMMARY I Type of Well (producer or injector): 1 Producer NS21 1249' FSL, 646' FEL, Sec. 11, T13N, R13E, UM X = 659827 Y = 6031021 2203' FSL, 3882' FEL, Sec. 33, T14N, R13E, UM X = 645778 Y = 6042249 21,685' TVDrkb 2388' FSL, 4104' FEL, Sec. 33, T14N, R13E, UM X = 645553 Y = 6042429 11,156' TVDrkb I AFE Number: 18313** I Rig: 1 Nabors 33E /' 1 I Estimated Start Date: 111/13/02 I Operating days to complete: 143.6 I I MD: 122,107 I I TVDrkb: 111,156 I I RKB/Surface Elevation: (a.m.s.!.) 156.0' / 15.9' 1 I Well Design (conventional, slimhole, etc.): 1 Modified Big Bore 1 I Objective: 1 Ivishak Producer with fiber optic surveillance control line 1 Northstar Slot: Surface Location: Target (top of SAG): 400' Radius Bottom Hole Location: Well Name: API Number: Well Type (proposed): BHP: EMW: BHT: MECHANICAL CONDITION: Cellar box: RKB to Cellar box: Rig Elevation: Conductor: NS21 Producer 5175 psi @ 11,100' TVDss 8.96 ppg 254 of @ 11,100' TVDss Elevation above MSL = 15.9' 40.1' (Estimated) RKB + MSL = 56.0' 201' MDrkb of 20",169#, X-56 (pre-driven) 3 NS21 Permit to Drill . . MUD PROGRAM: Surface Hole Mud Properties: Seawater Spud Mud 16" Hole Section From Surface to -5322' MD / 3206' TVD (-150' TVD below top SV6). Interval Density Viscosity YP Tauo Gel APIFL pH (ppg) (seconds) 10 sec Initial 8.8- 9.0 100 - 200 50 - 70 >8 25 - 40 15 - 20 8.5 - 9.5 from -1555' *9.0 - 9.~ 100 - 200 30-45 >6 15 - 25 6-10 8.5 - 9.5 SV6 @ Interval TD *9.5 75 - 100 20 - 35 >6 10 - 25 6-10 8.5 - 9.5 * Should gas hydrates be encountered, mud densities up to 10.2 ppg may prove necessary. Intermediate Hole Mud Properties: Seawater Polymer From Surface Casing Shoe to 19,701' MD / 9396' TVD. Interval Density (ppg) PV Initial 8.7 - 9.3 10 -16 Top HRZ 10.3. 10 - 16 Top Kuparuk to Miluveach 10.3 ./ 10 - 18 12-1/4" Hole Section YP 20 - 30 20 - 25 20 - 28 Tauo API/ HTTP FL 4-7 6-10 4 - 7 4-6 / <12 4-7 4-6/<12 pH 8.5 - 9.5 8.5- 9.5 8.5- 9.5 Drilling Liner Hole Mud Properties: Inhibited KCL 9" Hole Section From Intermediate Casing Shoe to 21,726' MD /10,877' TVD (top of Sag) Interval I Density (ppg) J PV I YP I Tauo Miluveach & Kingak to top of Sag 12.5 - 13.0 r I 25 - 30 20 - 30 4 - 8 API FL 4-6/<10 pH 8.5 - 9.5 Production Hole Mud Properties: Seawater/CaC03 Drill-In Fluid From Intermediate Casing Shoe to 22,107' MD / 11,156' TVD Interval I Density (ppg) I PV YP Initial/Final 9.1 - 9.3 8 - 12 20 - 25 6-1/8" Hole Section Tauo API FL 4-7 3-5 pH 8.5 - 9.5 KOP: Maximum Hole Angle: Close Approach Wells: Survey Program: t~~V\ ±250' MD/cante~urve 1.50°/100' to 3.0°/100' build ±65. 71 ° l --;::::::: Surface- 10' well spacing to well NS20; NS20 is 10.83' at 350' MD. Gyro will be used for initial surveys and kickoff Gyros as required from surface to +/-1000'. Standard MWD surveys from +/-1000' to TD. DIRECTIONAL:(P6) SURFACE AND ANTI-COLLISION ISSUES: All wells pass the major risk rule. Gyros will be run from surface to -1000' MD or until reliable MWD surveys can be taken. Surface Shut-in Wells: See Northstar Anti-Collision and Well Shut-In checklist. 4 NS21 Permit to Drill . . LOGGING PROGRAM: 16" Section: Drilling: GRlDirectional - Gyro as needed to -1000' MD Mud Logging - Gas analysis/detection, show kit with indexed sample bottles, lithology samples (100' intervals) Open Hole: None Cased Hole: None 12-1/4" Section: Drilling: GRlDirectional, Resistivity (real-time), PWD Mud Logging - Gas analysis/detection, show kit with indexed sample bottles, lithology samples (100' intervals) Open Hole: PEX and RFT's - Contingent on oil being present in the Kuparuk. Cased Hole: None 8-1/2" Section: Drilling: GRlDirectional, PWD Mud Logging - Gas analysis/detection, show kit with indexed sample bottles, lithology samples (100' intervals) Open Hole: None Cased Hole: None 6-1/8" Section: Drilling: GRlDirectional, Resistivity/Density/Neutron (recorded) Mud Logging - Gas analysis/detection, show kit with indexed sample bottles, lithology samples (100' intervals) Open Hole: None Cased Hole: None Inteqritv Testinq: Test Point Depth Shoe Test Type FIT FIT FIT EMW Estimated Casing/Liner Test 3500 psi w/ 9.3 ppg 4100 psi w/ 10.3 ppg 4800 psi w/ 12.5/8.65 3750 psi w/ 8.65 ppg /' 12 1fi¡" Surface 9 5/8" Intermediate 7" Drilling Liner 4 W' Production Liner 20' min from 12 1/4" shoe 20' min from 9 5/8" shoe 20' min from 7" shoe 12.5 ppg EMW Target 14.0 ppg EMW Target 11.5 ppg EMW Target CASINGlTUBING PROGRAM: Hole Size Casingl WtlFt Gr"e Conn. Casing Casing Top Hole Btm Tbg O.D. Length MDITVDrkb MDITVDrkb 20" 20" 169# X-56 WELD 201' Surface 201 '/201' 16" 13 3/8" 68# L-80 BTC 5322' Surface 5322'/3206' 121fi¡" 9 5/8" 47# L-80 BTC-Mod 19701 ' Surface 19701 '/9396' 8W' 7" 26# L-80 Hydril 521 2175' 19551 '/9281' 21726'/10877' 6-1/8" 4-1/2" 12.6# 13Cr Vam Ace 531' 21576'/10767' 22107'/11156' Tubing 4-1/2" 12.6# 13Cr Vam Ace 21576' Surface 21576'/10767' 5 NS21 Permit to Drill . . FORMATION MARKERS: TVDss I MDrkb I Pore Press. I Comment Formation Top estimated (Psi) I (ppg EMW) Top Permafrost 1,150 1243 542 8.65 Base Permafrost 1,520 1696 708 8.65 SV6 - top confining zone 2,998 4951 1373 8.65 Surface casing point 3,151 5322 SV5 - base confining zone 3,267 5604 1494 8.65 SV4 3,572 6346 1631 8.65 SV2 - top upper injection zone 3,962 7294 1807 8.65 SVl - top major shale barrier 4,352 8242 1982 8.65 TMBK - top lower injection zone - Top Ugnu 4,719 9134 2147 8.65 WS1- top Schrader Bluff - Base Ugnu 6,312 13007 2864 8.65 CM3 - Base lower injection zone (top Colville) 6,941 14536 3147 8.65 THRZ - Top HRZ * 8,671 18685 3925 8.65 Most likely eroded and not present BHRZ - Base HRZ 8,671 18685 3925 8.65 Most likely eroded and not present Top Kuparuk 8,701 18741 4265 9.43 Kuparuk C 8,996 19222 4428 9.47 Fault 26 throw = 240' 9,253 19581 Top MHuveach 9,291 19633 Intermediate casing point 9,341 19701 Intermediate logging point 9,341 19701 Top Kingak 9,734 20238 4690 9.27 \ '3 ,~ '7, Top Sag River 10,792 21685 5048 8.95 Intermediate casing point 10,822 21726 Geol target #1 10,792 21685 5015 8.94 Geologic Target #1 400' radius Top Shublik - 90 10,866 21786 5083 8.95 Top Ivishak 10,996 21964 5143 8.95 owe estimated from Seal A-I, A-2, A-3, NS Oil - Water contact 11,101 22107 5176 8.95 #1, NS27, NS31 Total Depth 11,101 22107 5180 8.93 Top Kavik 0 8.95 Top Lisburne 6 NS21 Permit to Drill REQUIRED MATERIALS: L-80 Surface: L-80 Intermediate: L-80 Drlg Liner: 13Cr Liner: 13Cr Completion: . 5322' 1 - 13 3/8" 1 - 13 3/8" None 17 -133/8" x 153/4" 1 - 20" x 13 3/8" 1 - 13 5/8" 19701 ' 1 - 9 5/8" 1 - 9 5/8" 1 - set 1 - 13 5/8" x 9 5/8" 303 - 9 5/8" x 12" 2175' 1-8%" 1 -7" 1 -7" 6 - 7" x 8 1/4" 1 - 7" x 9 5/8" 1 - 7" x 9 5/8" 1 -7" 1 -7" 531' 1 - 4-1/2" 1 - 4-1/2" 18 - 4-1/2" x 5-3/4" 9- 4-1/2" x 5-3/4" 1 - 4-1/2" x 7" 1 - 4-1/2" x 7" 1 - 4-1/2" 21576' 1 1 1 1 1 1 1 1 1 2 1 . 133/8",68# L-80 BTC HES Super Seal II Float Shoe (4.25" valve) HES Super Seal II Float Collar (4.25" valve) TAM Port Collar SV Rigid Centralizers ABB-VGI Fluted hanger - BTC down, 11 3A" external ACME landing thread ABB-VGI Casing Head/Tbg head 95/8",47# L-80 BTC-MOD HES Super Seal II Float Shoe HES Super Seal II Float Collar HES Cement Plug Set ABB-VGI Casing Hanger SV Rigid Centralizers 7", 26# L-80 Hydril 521 BBL reamer shoe HES Super Seal II Float Shoe HES Super Seal II Float Collar SV Rigid Centralizers Baker Flex Lock Hydraulic Set Liner Hanger - Rotating hanger. Baker ZXP Liner Top Packer Baker HRD running tool Baker Landing Collar and plug set 4-1/2",12.6# 13Cr-80 Vam Ace HES Super Seal II Float Shoe HES Super Seal II Float Collar RH Turbulators Stop bands Baker Flex Lock Hydraulic Set Liner Hanger Baker ZXP Liner Top Packer Baker Landing Collar and plug set 4-1/2",12.6# 13Cr-80 Vam Ace 4 %" ABB-VGI tubing hanger 4 %" ABB-VGI adapter flange 4 %" ABB-VGI 5-1/8" 5K Swab Valve w/ tree cap CIDRA mandrel and 0.25" fiber optic cable (w/4 W' cable clamps). 4 %" SVLN and 2 - 0.25" control lines 4 %" x 1 %" GLM with dummy valve installed 4 %" x 1 %" GLM with RP Shear valve installed 7" x 4 %" Baker 13 Cr packer S-3. 4 %" WLEG (w/o holes) 4 %" 13 Cr X nipples 4 %" 13 Cr XN nipple 7 NS21 Permit to Drill . . PERMAFROST: The 13-3/8" surface casing will be run approximately 1600' TVD below the permafrost to -5322' MD I 3206' TVD. The casing will be cemented to surface with a Premium 'G' with 2% calcium chloride tail slurry and a Permafrost 'L' lead slurry. The tail slurry allows sufficient compressive strength to prevent the shoe from breaking down as well as an accelerator to decrease thickening time. The lead slurry is light slurry that contains a freezing point depressant which enables the cement to set up rather than freeze. CEMENT CALCULATIONS: The following cement calculations are based upon a single stage job. Casing 113-3/8" Surface 1 Basis: Stage 1: / Lead: Based on 200' cased hole capacity from surface to 200' MD, 1696' of Open Hole + 125% excess from the permafrost to surface + 50% excess to 750'MD above the shoe. Lead TOC: Surface Tail: Based on 750' of 16" open hole x 133/8" casing with 50% excess + 80' shoe joint. Tail TOC: -4572' MD I Total Cement I Spacer Casing Basis: Stage 1: Preflush Spacer Lead 20 bbl sea water 75 bbl Alp acer wei~hted to 1.0 ppg over mud weight 612 bbl 82 k I 3432 ft of 10.7 ppg Permafrost 'L' Cement. 4.15 cfl ST 50° I BHCT 50°, TT = 6.0 hrs 96 bbl 6 k I 541 ff' of 15.8 ppg Premium 'G' wi 2% CaCI2. 1.16 , BHST 50° I BHCT 50°, TT = 4.0 hrs Tail 19-5/8" Intermediate Stage 1: / Lead: Based on 10447' of 12 1/4" open hole x 9 5/8" csg with 30% excess Lead TOC: At -7294' MD (4017' TVD) Tail: Based on 1960' of 12 " 4" open hole x 9 5/8" csg with 30% excess + 80' shoe joint. Tail TOC: At -17741' MD (8314' TVD) Total Cement I Spacer Preflush 20 bbls sea water Spacer 50 bbl Alpþ.a acer weighted to 1.0 ppg over mud MW Lead 758 bbl 3 sk I 4254 ft<l of 11.2 ppg Econolite. 3.24 cf _ T 210° I BHCT 130°, TT = 4.0 hrs Tail 148 bbl 2.sk I 831 ft<lof 15.9 ppg Premium 'G'. 1.15cf , HST2100/BHCT1300,TT=4.0hrs Casing 17" Drilling Liner Basis: Stage 1: / Slurry: Based on 2025' of 9" open hole x 7" csg with 50% excess + 150' 9 5/8" csg x 7" csg liner lap + 200 9-5/8" csg x 5" drillpipe above TaL + 80' shoe joint. Slurry TOC: At -19551' MD (9281' TVD) Stage 1: Total Cement / Spacer Spacer 50 bbl AlœJh. ..' acer w~ighted to 1.0 ppg over mud MW Slurry 116 bbl I zg';$k I 639 ff' of 15.9 ppg Premium 'G'. 1.50 cf/s', HST 250° I BHCT 150°, TT = 4.0 hrs Casing Basis: Stage 1: 14-1/2" Prod Liner Stage 1: / Slurry: Based on 381' of 61/8" open hole x 41/2" csg with 50% excess + 150' 7" csg x 41/2" csg liner lap + 200' 7" csg x 4" drillpipe above TaL + 80' shoe joint. Slurry TOC: At -21576' MD (10767' TVD) Total Cement I Spacer Spacer 35 bbl ~I.. . Spacer weighted to 1.0 ppg over mud MW Slurry 21 bbl ¡, sk 1114 ft<l of 15.9 ppg Premium 'G'. 1.50 cf . : BHST 250° I BHCT 150°, TT = 4.0 hrs 8 NS21 Permit to Drill . . WELL CONTROL: / ~ A Diverter waiver has been requested on well NS21. To date, BP has drilled 18 development wells through the Northstar upper stratagraphic intervals and has not experienced any difficulty with shallow gas. All 18 surface holes have been drilled and cemented to a common depth of approximately 3,170' tvdss depth. Each surface shoe has been set in the competent shale horizon approximately 150' TVD below the top of the SV6 formation marker. Well mud logs and seismic data do not indicate the presence of a shallow gas hazard. ~ Equipment to be Installed and capable of handling maximum potential surface pressures. (Schematics are on file with the AOGCC and MMS.) ~ 5000 psi working pressure pipe rams (2) ~ Blind/shear rams ~ Annular preventer /" ~ Based upon the calculations below, BOP equipment will be tested to 4800 psi. Surface Section: · Maximum anticipated BHP: 1373 psi @ 2998' TVDss - SV6 · Maximum surface pressure: 1013 psi @ surface (Based on BHP and a full column of gas from TD @ 0.12 psi/ft) Intermediate Section: · Maximum anticipated BHP: 4428 psi @ 8701' TVDss - Kuparuk 'c' · Maximum surface pressure: 3384 psi @ surface (Based on BHP and a full column of gas from TD @ 0.12 psi/ft) Drilling Liner Section: · Maximum anticipated BHP: 5048 psi @ 10792' TVDss - Sag River · Maximum surface pressure: 3753 psi @ surface (Based on BHP and a full column of gas from TD @ 0.12 psi/ft) Production Section: · Maximum anticipated BHP: 5176 psi @ 11101' T~S - Total Depth · Maximum surface pressure: 3844 psi @ surface (Based on BHP and a full column of gas from TD @ 0.12 psi/ft) · Planned BOP test pressure: 4800 psi (annular to 3500 psi) · Planned completion fluid: 8.5 ppg Seawater / 6.8 ppg Diesel DRILLING HAZARDS/CONTINGENCIES: / HYDROGEN SULFIDE - H2S: ./ Northstar is not designated as an H2S drill site, however Standard Operating Procedures for H2S precautions should be followed at all times. ./ No H2S was detected at Northstar while drilling or testing the Seal Island A-01, A-02, or A- 03 exploration/appraisal wells. ./ No H2S was detected while drilling the NS10 waste disposal well, or any subsequent Northstar wells. Reference information below on file with AOGCC: ~ Northstar/Nabors 33E H2S contingency plan. ~ Well test hydrocarbon analyses for Seal Island A-01, A-02, and A-03. DISPOSAL: Annular Injection: There will be no annular injection in this well. Cuttings Handling: Cuttings generated from drilling operations will be processed in the Grind and Inject Facility on Nabors 33E and will be disposed of in the NS10 Class I Waste Disposal Well. Fluid Handling: All Class I and Class II fluids will be processed by the Grind and Inject Facility on Nabors 33E and will be disposed of in the Northstar NS10 Class I Waste Disposal Well. 9 NS21 Permit to Drill . . · SURFACE HOLE SECTION: Mudloggers will be rigged up throughout the entire section. No significant drilling problems have been identified in the surface hole interval based on offset data. Good hole cleaning and management of required mud properties are key to a successful interval. Minor tight hole conditions have been noted in the shale intervals immediately below the permafrost during short trips. Differential sticking could be problematic in this hole section adjacent to the permeable SV Sands. Avoid leaving drill string stationary for extended periods, tighten fluid loss properties of mud. Lost circulation has only been noted while drilling during hole opening runs and was most likely induced by poor hole cleaning. Losses have occurred while running and cementing surface casing. The NS27 experienced losses on the surface cement job at a rate of 12 BPM. The displacement rate was lowered to 10 BPM and full returns were re-established. Be sure to condition and thin mud appropriately prior to pulling out of the hole to run casing, and once on bottom with casing, bring circulation up slowly and reduce mud viscosities before pumping cement. Minor losses were seen on NS29 while running the 13 3/8" surface casing. Reduced running speed eliminated losses and the casing was cemented at 10 BPM displacement rate. Gas hydrates may be present near the base of the permafrost"Wells drilled in the 2000-2002 drilling season have not experienced hydrates~ Mudloggers will be used continuously on NS21 * to help identify and trend any increase in background gas readings. If gas hydrates are encountered, mud weight may be increased to 10.2 ppg and treated with 2 ppb Driltreat (Lecithin). Additional measures include reducing flow rates to -450 to 500 gpm and keeping the mud temperature cool. · · · · · · INTERMEDIATE SECTION: Mudlog ers will be rigged up throughout the entire section. Mino ga shows have been reported in the four (4) Seal Island wells and have been identified as 0 ssociated methane. No indications of shallow gas were seen while drilling during the 2 .;2002 drilling season. Mudloggers will be used continuously on this well to help identify and trend any increase in background gas readings. Surface casing will be set prior to any intervals with previously noted gas shows to facilitate nippling up the BOP's. A minimum of 9.0 ppg is recommended. The shallow intervals beneath Northstar are, by interpretation, not faulted. To be prepared for any potential lost circulation, a copy of the 'Non-Payzone Lost Circulation Decisi~ Tree' can be found in the last section of the Master Well Plan, which can be found on the rig. Pressure While Drilling (PWD) will be used to monitor the annular pressure. The pressure data will be used to minimize the equivalent circulating density (ECD), minimize lost circulation due to packing off due to loading up the wellbore with solids and provide for an additional well control tool to make sure the well does not become under-balanced. Differential sticking can be a problem if lost circulation is occurring or if the drill string is left stationary for an extended period or time across the permeable SV Sands. Gas in the Kuparuk is likely (5000 unit mud log show in NS13). Circulate as required. High mud weight should minimize the gas entry from the Kuparuk. Oil is not expected in the Kuparuk, however, if oil is found be prepared to run wireline logs to evaluate. ~. >, The kick tolerance for the 12 1/4" open hole section would b 11. 4libls assuming an influx from the Kuparuk interval at -9051 TVD. This is the worst-case c~rio based on a 9.97 ppg (0.5 ppg over the known pore pressure) pore pressure gradient, a fracture gradient (FIT) of 12.5 ppg at the 13-3/8" shoe, and 10.3 ppg mud in the hole. · · · · · · · 10 NS21 Permit to Drill . . DRILLING LINER SECTION: · Mudloggers will be rigged up throughout the entire section. Pressure While Drilling (PWD) will be used to monitor the annular pressure. The pressure data will be used to minimize the equivalent circulating density (ECD), minimize lost circulation due to packing off due to loading up the wellbore with solids and provide for an additional well control tool to make sure the well does not become under-balanced. Gas in the Sag is possible. Circulate as required. According to Geology, the top of the Sag is poor, not porous/permeable rock. This, along with the higher mud weight should minimize the gas in the top of the SAG. One(1) seismic-scale fault will be encountered in this wellbore, Fault 26. Penetration is expected at - 9252 TVDss +/- 400' TVDss; within the upper portion of the Miluveach. TML V could easily be faulted out in this well. Be prepared for any potential lost circulation, a copy of the 'Non-Payzone Lost Circulation Decision Tree' can be found in the last section of the Master Well Plan, which can be found on the Rig. ~/-) The kick tolerance for the 8-1/2" open hole section is nfi: (due to limited amount of open hole) assuming an influx from the Sag River interval. s Îs the worst-case scenario based on a 9.77 ppg (0.5 ppg over the anticipated pore pressure) pore pressure gradient, a fracture gradient of 14.0 ppg at the 9-5/8" shoe, and 13.0 ppg mud in the hole. · · · · PRODUCTION SECTION: · Mudloggers will be rigged up throughout the entire section. Gas in the Sag River or Ivishak will be circulated out as required. · The drilling liner shoe will be drilled out with the 9.3 ppg mud. The mud will then be displaced with a 9.1 ppg drill-in fluid. The mud weight will be increased to 9.3 ppg prior to tripping out of the hole. · Differential sticking is not anticipated but the drill string should not be left stationary for any length of time. · There is a small probability (30%) of encountering small-scale faults in the interval from TKNG to TD. Small-scale undulations in TSGR and underlying reflections located within the target cylinder are observed in the wiggle trace and in the coherency volumes. · Potential losses will be treated with the "Pay-zone" loss circulation decision tree. · The well is planned to stop short of the OWC. The Kavik will not be penetrated. The project Geologist will be in charge of picking TD above the Owæa. ufficient rathole will be drilled. · The kick tolerance for the 6 1/8" open hole section i . fin' (due to limited amount of open hole) assuming an influx from the proposed TD. This . "rio is based on a 9.45 ppg (0.5 ppg over the anticipated pore pressure) pore pressure gradient, a fracture gradient of 11.5 ppg (based on FIT) at the 7" shoe, and 9.1 ppg mud in the hole. 11 NS21 Permit to Drill . . NS21 RiQ-site Summary of DrillinQ Hazards POST THIS NOTICE IN THE DOGHOUSE -v Gas hydrates may be present near the base of the permafrost. Mudloggers will be used continuously on NS21 to help identify and trend any increase in background gas readings. If gas hydrates are encountered, mud weight may be increased to 10.2 ppg and treated with 2 ppb Driltreat (Lecithin). Additional measures include reducing flow rates to -450 to 500 gpm and keeping the mud temperature cool. -v Differential sticking could be problematic in both the surface and intermediate hole sections adjacent to the permeable SV Sands. Avoid leaving drill string stationary for extended periods; tighten fluid loss properties of mud. -v Minor gas shows have been reported in the four (4) Seal Island wells and have been identified as coal associated methane. No indication of shallow gas was seen in any previously drilled Northstar wells. Mudloggers will be used continuously on NS21 to help identify and trend any increase in background gas readings. Surface casing will be set prior to any intervals with previously noted gas shows to facilitate nippling up the BOP's. -V Severe losses have been seen in the intermediate section with a higher mud weight (11.6 ppg). The well design has been changed to alleviate this problem. The new casing design sets the 95/8" casing in the Miluveach and drills out with an 8 'W' assembly to the Top Sag to allow an appropriate cushion for mud weight increases in the Jurassic shale interval. To be prepared for any potential lost circulation, the 'Lost Circulation Decision Tree' can be found in the last section of the Master Well Plan, which can be found on the Rig. -V Packing off due to improper hole cleaning can lead to stuck pipe. The PWD data, pick- up/slack-off weights and other drilling parameters must be monitored at all times. If in doubt, stop and condition the hole prior to drilling ahead or tripping. -V Bit balling has been experienced in the Miluveach. The mud properties and PDC bit selection will be closely monitored to minimize potential balling. -V The Kingak shale, in the offset Seal Island wells drilled by Shell, experienced severe hole instability. The casing shoe at the base of the Kuparuk, higher mud weight and lower angles will help with hole conditions. -V Conglomerate drilling in the Ivishak can lead to lost circulation, packing off due to unconsolidated formation and directional problems due to deflection of the drill string off of large rocks. Key drilling parameters must be monitored at all times. Do not drill ahead if a potential problem is detected. Severe lost returns were experienced on the NS29 in the Shublik and Ivishak. The LCM decision tree will be maintained on the rig as well as in the Master Well Plan. -V Northstar is not a designated H2S pad. ~ CONSULT THE NORTHSTAR PAD DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION 12 · ,eIGINAL KB. ELEV = 56' -BF. ELEV = 40.1' CB. ~~EV""~5.9' " 1/2" SSSV @100pY'N0 wI HXO SVLN nipple -~~' 10 6.8PPG OIESEL FREEZE PROTECTION AT +1- 4000' TVO (7253'MO) * TREE: ABB-VGI 5 1/8" 5ksi . WELLHEAO: ABB-VGI 13-5/8" ' Multibowl 5ksi NS21 - Proposed 133/8", 68#/ft, L-80, BTC @ 5322' MO ~ .. 4 1/2" GLM @ 4500' TVO (8468' MO) wI 4.62" 10 4 1/2" GLM @ 5000' TVO (9685'MD) wI 4.62" 10 4 1/2", 12.6#/ft, 13-Cr, Vam-Ace TUBING 10: 3.958" . CAPACITY: 0.01522 BBLlFT 9-5/8" 47# L-80 BTM-C @ 19701' MD 6 ~ 7" LINER TOP @ 19551' MD 4.5" X NIPPLE, @ 21526' MO 3.813" 10 4.5" X NIPPLE, @ 21546' MO ~ 3.813" 10 4.5" XN NIPPLE, @ 21556' MO 3.725" ID 4.5" WLEG, @ 21566' MO ~ 3.958" ID ~ V I 4.5" Fiber Optic Transducer 3.958" ID ;¡ _ 7" PACKER, 13 Cr @ 21536' MO r_ ~ 4.5" LINER TOP @ 21576' MD 7", 26#/ft L-80, Hydril 521 @ 21726' MO -. ... PBTO @ 22067' MD TD @ 22107' MO 4.5",12.6#, 13Cr Vam Ace OATE REV. BY COMMENTS 10/31/02 BMH "NS21 Proposed Northst;:¡¡r WEU : NS?1 API NO: BP Exploration (Alaska) TREE: ABB-VGI 5 1/8" 5ksi . WELLHEAD: ABB-VGI13-5/8" Multibowl 5ksi . ORIGINAL KB. ELEV = 56' KB-BF. ELEV = 40.1' CB. ELEV = 15.9' NS21 Operation Shutdown / . 6.8PPG DIESEL FREEZE PROTECTION AT +1- 1575' TVD (1696'MD) 8.65 ppg Seawater from 1696' MD I 1575' TVD to 5322' MD 13206' TVD . 133/8", 68#/ft, L-80, BTC @ 5322' MD ~ ~ EMW = 8.06 ppg DATE REV. BY COMMENTS 10/31/02 BMH "NS21 Operation Shutdown Northstar WELl : NS21 API NO: BP Exploration (Alaska) . . Oilfield Services, Alaska Schlumberger Drilling & Measurements Schlumbørgør 3940 Arctic Blvd, Site 300 Anchorage, AK 99503 Tel (907) 273-1766 Fax (907) 561-8357 Monday, October 21, 2002 Barbara Holt BP Exploration Alaska Close Approach Analysis We have examined the potential intersections of subject well with all other potentially conflicting wells, according to the BPA Directional Survey handbook (BPA-D-004) dated 09/99. Northstar NS21 (P6) Nabors 33E Method of analysis: 1. A list of wells to be analyzed is created in Compass by performing a global scan with an initial search radius of two thousand feet with an increment of one hundred feet for every one thousand feet of measured depth in the subject well. 2. Wells are analyzed using the Compass Anti-collision module (BP Company setup) with major risk safety factors applied. For problem wells that are plugged and abandoned or that can be shut in, risk-based safety factor may be used, with client notification. 3. All depths are relative to the planned well profile. Survey ProQram: Instrument Type GYD-GC-SS MWD-IFR-MS Start Depth 40.20' md 1,000' md End Depth 1,000' md 22,107.44' md Close Approach Analysis results: Under method (2), all wells pass major risk rules: / Note: NS20 (actual survey) and NS22 (planned survey) pass major risk ruleset, however, it is suggested Risk based 1 :200 ruleset be used for more room from tolerance lines during surface drilling. All data documenting these procedures is available for inspection at the Drilling and Measurements Directional Planning Center. Close Approach Drillina Aids to be provided: A drilling map, with offset wells on the plan view, and traveling cylinder will be provided. Checked by: Scott Delapp 10/21/02 - ...... (1)- J!?ëï5 8:2 o <I) M > II .8 c ('is .- ~ "'-1"- "--'"'I"- !.O !.O 00 ~ 3000 6000 - ..;....: (!) a:: 9000 - > (!) w VERTICAL Client: Well: Field: Structure: SECTION VIEW BF Exploration Alaska NS21 (F6) Northstar Northstar PF 309.86 deg September 23, Section At: Date: 2002 o MO 9396 TVD 16633 departure 10847 TVO 309.86~ at 17986 departure (1 in::: 3000 ^ ^ ^ 3000 - v v v o -3000 -18000 -18000 PLAN VIEW Client: Well: Field: Structure: Scale: Date: BP Exploration Alaska NS2l (P6) Northstar Northstar PF 1 in = 3000 ft 23-Sep-2002 --------------------~ -15000 -12000 -9000 -6000 -3000 o TDl4-1t2"lnrPt 22107MD 1i156TVD 43.0œ 309.86'" az 11712N 14027W True North Mag Dec ( -15000 -12000 -9000 -3000 o «< »> 3000 -12000 9000 - 6000 - 3000 -0 -3000 3000 .0................................'........'.'...........................,b..............p..... .. . ..... \ . KB KOP Bid 1.5/100 Bid 3/100 Top Permafrost Report Date: Client: Field: structure / Slot: Well: Borehole: UWI/API#: Survey Name / Date: Tort / AHD / DDI/ ERD ratio: Grid Coordinate System: Location LatlLong: Location Grid NIE Y/x: Grid Convergence Angle: Grid Scale Factor: stationlD MD (ft) 0.00 250.00 300.00 350.00 400.00 500.00 600.00 700.00 800.00 900.00 1000.00 1100.00 1200,00 1242.58 1300.00 1400.00 1500.00 1600.00 NS21 (P6) report.xls NS21 Proposed Well Profile - Geodetic Report 21-0ct..o2 BP Exploration Alaska Northstar NorthmarPF/NS21 tel ~~~~ APprove 50-029- NS21 (P6) S24/ October 21,2002 88,421 ° /18273.91 It /6,505/1.63é NAD27 Alaska State Planes, Zone 4, US Feel N 70.49129601, W 148,6933109E N 6031021,480 ItUS, E 659827.320 ItUS +1.23169690° 0.99992902 Incl (") 0.00 0.00 0.75 1.50 3.00 6.00 9.00 12.00 15.00 18.00 21.00 24.00 27.00 28.28 30.00 33.00 36.00 39.00 Azim (") 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 309.86 1VD (ft) 0.00 250.00 300.00 349.99 399.95 499.63 598.76 697.08 794.30 890.17 984.43 1076.80 1167.05 1204.77 1254.92 1340.18 1422.58 1501.91 ~ Survey / DLS Computation Method: Vertical Section Azimuth: 10/ 7/02 ~~~=::~:~ 1VD Reference Elevation: Sea Bed / Ground Level Elevation: Magnetic Declination: Total Field strength: Magnetic Dip: Declination Date: Magnetic Declination Model: North Reference: Total Corr Mag North -> True North: Local Coordinates Referenced To: VSec (ft) 0,00 0.00 0.33 1.31 3.27 11.12 24.17 42.39 65.73 94.13 127.51 165.77 208.82 228.57 256.53 308.77 365.41 426.27 NI-S (ft) 0.00 0.00 0.21 0.84 2.10 7,13 15.49 27.17 42,13 60.33 81.72 106.25 133.84 146.50 164.42 197.90 234.20 273.22 Page 1 of 3 EI-W (ft) 0.00 0.00 -0.25 -1.00 -2.51 -8.53 -18.55 -32.54 -50.46 -72.25 -97.87 -127.24 -160.29 -175.45 -196.91 -237.01 -280.48 -327.20 Schlllllrger Minimum Curvature I Lubinski 309,860° N 0.000 It, E 0.000 It KB 55,8 It relative to MSL 15,670 It relative to MSL 26,135° 57548,157 nT 80,949° 3Q-Nov-02 BGGM 2002 True North +26.135° Well Head . DLS (o/100ft) 0.00 0.00 1.50 1.50 3.00 Grid Coordinates Northing I Easting (ftUS) (ftUS) 6031021.48 659827.32 6031021.48 659827.32 6031021.68 659827.07 6031022.30 659826.30 6031023.53 659824.77 Geographic Coordinates Latitude I Longitude N 70.49129601 W 148.69331095 N 70.49129601 W 148.69331095 N 70.49129658 W 148.69331300 N 70.49129830 W 148.69331913 N 70.49130174 W 148.69333147 /~.oo 6031028.42 3.00 6031036.57 3.00 6031047.94 3.00 6031062.51 3.00 6031080.24 3.00 6031101.07 3.00 6031124.96 3,00 6031151.83 3.00 6031164.16 3.00 6031181.62 3.00 6031214.23 3.00 6031249.58 3.00 6031287.58 659818.64 N 70.49131549 W 148.69338068 659808.44 N 70.49133832 W 148.69346259 659794.21 N 70.49137023 W 148.69357694 659775.97 N 70.49141110 W148.69372343 659753.80 N 70.49146082 W 148.69390155 . 659727.72 N 70.49151925 W 148.69411098 659697.83 N 70.49158626 W 148.69435106 659664.20 N 70.49166164 W 148.69462123 659648.77 N 70.49169622 W 148.69474515 659626.94 N 70.49174517 W 148.69492058 659586.13 N 70.49183663 W 148.69524838 659541.89 N 70.49193580 W 148.69560374 659494.35 N 70.49204239 W 148.69598567 10/21/2002-10:30 AM Grid Coordinates Geographic Coordinates Station ID MD Incl Azim TVD VSec NI-S EI·W DLS Northing I Easting Latitude I Longitude (ft) (") (0) (ft) (ft) (ft) (ft) (0/10Oft) (ftUS) (ftUS) Base Permafrost 1695.74 41.87 309.86 1574.77 488.36 313.01 -374.86 3.00 6031326.34 659445.85 N 70.49215108 W 148.69637528 1700.00 42.00 309.86 1577.94 491.21 314.84 -377.05 3.00 6031328.12 659443.62 N 70.49215608 W 148.69639318 1800.00 45.00 309.86 1650.47 560.04 358.95 -429.88 3.00 6031371.08 659389.86 N 70.49227658 W 148.69682507 1900.00 48.00 309.86 1719.30 632.57 405.44 -485.55 3.00 6031416.36 659333.20 N 70.49240357 W 148.69728018 2000.00 51.00 309.86 1784.23 708.60 454.17 -543.92 3.00 6031463.82 659273.80 N 70.49253668 W 148.69775736 2100.00 54.00 309.86 1845.10 787.93 505.01 -604.81 3.00 6031513.34 659211.84 N 70.49267556 W 148.69825516 2200.00 57.00 309.86 1901.74 870.33 557.83 -668.06 3.00 6031564.78 659147.47 N 70.49281984 W 148.69877225 2300.00 60.00 309.86 1953.98 955.58 612.47 -733.50 3.00 6031618.00 659080.88 N 70.49296909 W 148.69930726 . 2400.00 63.00 309.86 2001.69 1043.46 668.79 -800.95 3.00 6031672.85 659012.24 N 70.49312293 W 148.69985871 End Bid 2490.35 65.71 309.86 2040.79 1124.90 720.99 -863.46 3.00 6031723.69 658948.63 N 70.49326552 W 148.70036977 SV6 4950.51 65.71 309.86 3052.77 3367.28 2158.23 -2584.69 0.00 6033123.50 657197.03 N 70.49719078 W 148.71444498 13-3/8" Csg pt 5322.45 65.71 309.86 3205.77 3706.30 2375.52 -2844.92 0.00 6033335.13 656932.21 N 70.49778412 W 148.71657346 SV5 5604.45 65.71 309.86 3321.77 3963.34 2540.27 -3042.22 0.00 6033495.59 656731.42 N 70.49823398 W 148.71818731 SV4 6345.92 65.71 309.86 3626.77 4639.17 2973.43 -3560.98 0.00 6033917.47 656203.51 N 70.49941669 W 148.72243093 SV2 7294.02 65.71 309.86 4016.77 5503.34 3527.32 -4224.31 0.00 6034456.93 655528.48 N 70.50092890 W 148.72785789 SV1 8242.13 65.71 309.86 4406.77 6367.52 4081.20 -4887.64 0.00 6034996.38 654853.44 N 70.50244091 W 148.73328567 TMBK 9134.32 65.71 309.86 4773.77 7180.73 4602.42 -5511.86 0.00 6035504.03 654218.21 N 70.50386363 W 148.73839416 WS1 13006.95 65.71 309.86 6366.77 10710.56 6864.84 -8221.32 0.00 6037707.52 651460.95 N 70.51003743 W 148.76057615 CM3 14536.07 65.71 309.86 6995.77 12104.32 7758.15 -9291.15 0.00 6038577.57 650372.24 N 70.51247439 W 148.76933842 Drp 2/100 18299.41 65.71 309.86 8543.81 15534.52 9956.71 -11924.14 0.00 6040718.87 647692.80 N 70.51847031 W 148.79091248 18300.00 65.70 309.86 8544.05 15535.05 9957.06 -11924.55 2.00 6040719.21 647692.38 N 70.51847126 W 148.79091584 18400.00 63.70 309.86 8586.79 15625.46 10015.00 -11993.95 2.00 6040775.64 647621.75 N 70.51862924 W 148.79148466 18500.00 61.70 309.86 8632.65 15714.31 10071.95 -12062.15 2.00 6040831.10 647552.35 N 70.51878452 W 148.79204365 18600.00 59.70 309.86 8681.59 15801.52 10127.84 -12129.09 2.00 6040885.54 647484.23 N 70.51893691 W 148.79259232 T oplBase H RZ 18685.40 57.99 309.86 8725.77 15874.59 10174.68 -12185.18 2.00 6040931.16 647427.15 N 70.51906462 W 148.79305207 . 18700.00 57.70 309.86 8733.54 15886.96 10182.60 -12194.67 2.00 6040938.87 647417.49 N 70.51908621 W 148.79312986 Top Kuparuk 18741.13 56.88 309.86 8755.77 15921.56 10204.78 -12221.24 2.00 6040960.47 647390.45 N 70.51914668 W 148.79334764 18800.00 55.70 309.86 8788.44 15970.53 10236.17 -12258.82 2.00 6040991.05 647352.21 N 70.51923227 W 148.79365568 18900.00 53.70 309.86 8846.23 16052.14 10288.47 -12321.47 2.00 6041041.99 647288.46 N 70.51937486 W 148.79416921 19000.00 51.70 309.86 8906.82 16131.68 10339.45 -12382.52 2.00 6041091.64 647226.33 N 70.51951386 W 148.79466964 19100.00 49.70 309.86 8970.16 16209.06 10389.05 -12441.92 2.00 6041139.95 647165.88 N 70.51964909 W 148.79515654 19200.00 47.70 309.86 9036.16 16284.18 10437.19 -12499.58 2.00 6041186.83 647107.20 N 70.51978033 W 148.79562919 Kuparuk C 19221.62 47.27 309.86 9050.77 16300.12 10447.41 -12511.81 2.00 6041196.79 647094.76 N 70.51980820 W 148.79572944 19300.00 45.70 309.86 9104.74 16356.95 10483.84 -12555.44 2.00 6041232.27 647050.36 N 70.51990752 W 148.79608709 19400.00 43.70 309.86 9175.82 16427.29 10528.91 -12609.43 2.00 6041276.16 646995.42 N 70.52003039 W 148.79652967 NS21 (P6) report.xls Page 2 of 3 10/21/2002-10:30 AM Grid Coordinates Geographic Coordinates StationlD MD Incl Azim 1VD VSec NI·S E/·W DLS Northing I Easting Latitude I Longitude (ft) (") (0) (ft) (ft) (ft) (ft) (0/10Oft) (ftUS) (ftUS) End Drp 19434.94 43.00 309.86 9201.22 16451.27 10544.28 -12627.84 2.00 6041291.13 646976.68 N 70.52007230 W 148.79668058 Fault 26 Crossing 19580.62 43.00 309.86 9307.77 16550.63 10607.96 -12704.11 0.00 6041353.15 646899.07 N 70.52024591 W 148.79730581 TMLV 19632.58 43.00 309.86 9345.77 16586.06 10630.67 -12731.31 0.00 6041375.27 646871.39 N 70.52030782 W 148.79752878 9-5/8" Csg pt 19700.95 43.00 309.86 9395.77 16632.69 10660.56 -12767.10 0.00 6041404.38 646834.96 N 70.52038931 W 148.79782218 Top Kingak 20238.31 43.00 309.86 9788.77 16999.17 10895.44 -13048.41 0.00 6041633.15 646548.69 N 70.52102964 W 148.80012835 Target S24 21684.94 43.00 309.86 10846.77 17985.77 11527.76 -13805.74 0.00 6042249.00 645778.00 N 70.52275331 W 148.80633766 Top Sag River 21684.95 43.00 309.86 10846.78 17985.78 11527.77 -13805.75 0.00 6042249.01 645777.99 N 70.52275334 W 148.80633774 7" Lnr Pt 21725.96 43.00 309.86 10876.77 18013.74 11545.69 -13827.21 0.00 6042266.46 645756.15 N 70.52280219 W 148.80651370 . Top Shublik 21786.12 43.00 309.86 10920.77 18054.77 11571.99 -13858.71 0.00 6042292.07 645724.10 N 70.52287388 W 148.80677199 Top Ivishak 21963.87 43.00 309.86 11050.77 18176.00 11649.69 -13951.77 0.00 6042367.75 645629.39 N 70.52308567 W 148.80753507 OWC 22107.43 43.00 309.86 11155.76 18273.91 11712.44 -14026.92 0.00 6042428.87 645552.92 N 70.52325671 W 148.80815130 TD 14-1/2" Lnr Pt 22107.44 43.00 309.86 11155.77 18273.91 11712.44 -14026.93 0.00 6042428.87 645552.91 N 70.52325671 W 148.80815138 Leaal Description: Surface: 1249 FSL 646 FEL S11 T13N R 13E UM Target S24: 2203 FSL 3882 FEL S33 T14N R13E UM BHL: 2388 FSL 4104 FEL S33 T14N R13E UM Northina (YI rftUSl 6031021.48 6042249.00 6042428.87 Easting (XI rftUSl 659827.32 645778.00 645552.91 . NS21 (P6) report.xls Page 3 of 3 10/21/2002-10:30 AM . . Schlumberger Anticollision Report NO GLOBAL SCAN: Using user defined selection & scan criteria Interpolation Method: MD Interval: 50.00 ft Depth Range: 40.20 to 22107.44 ft Maximum Radius: 3000.00 ft Reference: Error Model: Scan Method: Error Surface: Principal Plan & PLANNED PROGRAM ISCWSA Ellipse Trav Cylinder North Ellipse + Casing Survey Program for Definitive Wellpath Date: 10/18/2000 Validated: No Planned From To Survey ft ft 40.20 1000.00 Planned: Plan #6 V1 1000.00 22107.44 Planned: Plan #6 V1 Version: 42 T oolcode Tool Name GYD-GC-SS MWD+IFR+MS Gyrodata gyro single shots MWD + IFR + Multi Station Casing Points 5322.45 3205.77 13.375 16.000 133/8" 19700.95 9395.77 9.625 12.250 9 5/8" 21725.96 10876.77 7.000 8.500 7" 22107.44 11155.77 4.500 6.125 4 1/2" Summary Northstar PF NS05 Plan NS05 V10 Plan: PI 347.28 350.00 160.73 7.84 152.89 Pass: Major Risk Northstar PF NS06 NS06 V32 298.42 300.00 150.51 5.73 144.78 Pass: Major Risk Northstar PF NS07 NS07 V33 149.64 150.00 141.29 3.12 138.18 Pass: Major Risk Northstar PF NS08 NS08 V18 298.65 300.00 130.07 5.45 124.62 Pass: Major Risk Northstar PF NS09 NS09 V14 99.66 100.00 120.62 2.19 118.44 Pass: Major Risk Northstar PF NS10 NS10 V17 444.37 450.00 107.01 7.33 99.72 Pass: Major Risk Northstar PF NS12 NS12 V23 347.99 350.00 85.62 6.89 78.75 Pass: Major Risk Northstar PF NS13 NS13 V12 298.83 300.00 83.08 5.57 77.51 Pass: Major Risk Northstar PF NS14 NS14 V11 348.97 350.00 67.97 6.45 61.53 Pass: Major Risk Northstar PF NS15 NS15 V19 348.79 350.00 61.90 6.43 55.47 Pass: Major Risk Northstar PF NS16 NS16 V34 349.14 350.00 50.30 7.40 42.91 Pass: Major Risk Northstar PF NS17 NS17 V10 349.71 350.00 43.12 5.92 37.21 Pass: Major Risk Northstar PF NS18 NS18 V11 349.51 350.00 29.08 7.18 21.90 Pass: Major Risk Northstar PF NS19 Plan NS19 V8 Plan: Pia 350.09 350.00 21.03 6.68 14.35 Pass: Major Risk Northstar PF NS20 NS20 V10 350.27 350.00 10.83 5.88 4.95 Pass: Major Risk Northstar PF NS22 Plan NS22 V8 Plan: Pia 400.17 400.00 8.69 7.39 1.32 Pass: Major Risk Northstar PF NS23 Plan NS23 V26 Plan: PI 600.79 600.00 16.78 11.15 5.63 Pass: Major Risk Northstar PF NS24 NS24 V14 550.75 550.00 25.36 9.67 15.75 Pass: Major Risk Northstar PF NS26 NS26 V22 652.27 650.00 37.28 10.96 26.36 Pass: Major Risk Northstar PF NS27 NS27 V29 652.67 650.00 48.43 12.29 36.15 Pass: Major Risk Northstar PF NS29 NS29 V22 961.64 950.00 71.69 17.89 53.85 Pass: Major Risk Northstar PF NS31 NS31 V14 755.28 750.00 80.34 13.56 66.78 Pass: Major Risk Seal Island SEAL-A-01 SEAL-A-01 V4 1124.27 1100.00 248.56 21.62 226.94 Pass: Major Risk Seal Island SEAL-A-02 SEAL-A-02 VO 1174.39 1150.00 226.04 24.42 201.62 Pass: Major Risk Seal Island SEAL-A-03 SEAL-A-03 V4 1124.56 1100.00 231.07 18.86 212.21 Pass: Major Risk Seal Island SEAL-A-04 SEAL-A-04 V4 1130.22 1100.00 280.94 21.01 259.94 Pass: Major Risk Northstar PF Field: Site: Well: NSl7(NS17) " NS13(!'1""NJill) Plan NS21 Site: Northstar PF . Drilling Target Conf.: 9'P Description: Sag Target Map Northing: 6042249.00 ft Map Easting : 645778.00 ft Latitude: 70031'21.912N Shape: Circle .ell: NS21 Based on: Planned Program Vertical Depth: 10791.00 ft below Mean Sea Level Local +N/-S: 11527.75 ft Local +E/-W: -13805.71 ft Longitude: 148°48'22.816W Radius: 400 ft Target: S24 124-00 12200 12000 11800 11500 I 14-00 11200 11000 10800 0 0 0 0 0 0 0 0 o ~ 0 0 0 0 0 0 0 N 0 CD LD --T N 0 o ~ / --T --T (í) (í) (í) (í) (í) Q ~ ~ / ~ ~ A H 207127 DATE INVOICE I CREDIT MEMO 9/20/02 INV# CK091602G l10cll THE A1TACHED CHECK IS IN PAYMENT FOR ITEMS DESCRIBED ABOVE. BP EXPLORATION, (ALASKA) INC. P.O. BOX 196612 ANCHORAGE, ALASKA 99519·6612 PAY TO THE ORDER OF DESCRIPTION PERMIT TO DRILL FEE TOTAL ~ B. P. ~j..;r I::::' (q:;:I:!:;::~'!::::' GAS CONSERVATION AVE, STE 100 AK 99501 GROSS DATE 9/20/02 I CHECK NO. H207127 56-389 4i2 VENDOR DISCOUNT NET REEE"ED NOV 0 6 2002 Alaska Oil & Gas Cons. CommlSSÎOí Anchoraçe No. H 207127 CONSOLIDATED COMMERCIAL ACCOUNT AMOUNT 1.****$100.00**** ~~:'::~~.~~.~.~~~.:)f.~.~~~.~. ....'..1~.. ,......, .... ..:.), .5·:~~:':::":',.;·'\-".ß,>.: .:~...~:>,:~.;\;." ~~..l.:\..};.:.:~.:.:~ :.\;'. ".:.... ........'.::~:~ ."*....~.~..._..,....,:..... f¡)~<Wi~;:·.:·.~;~??:·;~::···:~;;..;¡/·:;:~· ..-,.~'''''''''''''..:_...¡.,'_<..., 0.\·..........,:\;....·\:..1...···"--·-....·.·.· ...... ...... .... (\" .::"'/_':,:~. ,,;;t,:. :\ ,{)'.~.. - .~...... _ t·...,::..... ':", ~ :\. :... ¿ FIRST NAnONAL BANK OF ASHLAND AN AFFILIATE OF NATIONAL CITY BANK CLEVELAND, OHIO II- ~ 0 ? ~ ~ ? II- I: 0 ~ ~ ~ 0 3 a t1 5 I: 00 a ~ ~ ~ t111- SEPT. 20, 2002 H . . . . TRANSMIT AL LETTER CHECK LIST CIRCLE APPROPRIATE LETTER/P ARAGRAPHS TO BE INCLUDED IN TRANSMITTAL LETTER WELL NAME ;U"ç- 2-. / PTD# 20;2..- 2 /<is CHECK WHAT APPLIES ADD-ONS (OPTIONS) MULTI LATERAL (If API number last two (2) digits are between 60-69) "CLUE" The permit is for a new wellbore segment of existing well-, Permit No, API No. Production should continue to be reported as a function· of the original API number. stated above. HOLE In accordance with 20 AAC 25.005(1), all records, data and logs acquired for the pilot hole must be clearly differentiated in both name (name on permit plus PH) and API number (SO 70/80) from records, data and logs acquired for well (name on permit). PILOT (PH) SPACING EXCEPTION DRY DITCH SAMPLE Rev: 07110/02 C\jody\templates The permit is approved subject to full compliance with 20 AAC 25.055. Approval to perforate and produce is contingent upon issuance of a conservation order approving a spacing exception. (Company Name) assumes the liability of any protest to the spacing exception that may occur. All dry ditch sample sets submitted to the Commission must be in no greater than 30' sample intervals from below the permafrost or from where samples are first caught and 10' sample intervals through target zones. AA,rl4~r WELL PERMIT CHECKLIST COMPANY ),P)2 WELL NAME A...J5'? J FIELD & POOL S? n J /"u'!) INIT CLASS ./J.,.V /... ~ // ,- ADMINISTRATION 1. Permit fee attached. . . . . . . . . . . . . . . . . . . . . . . 2. Lease number appropriate. . . . . . . . . . . . . . . . . . . 3. Unique well name and number. . . . . . . . . . . . . . . . . 4. Well located in a defined pool.. . . . . . . . . . . . . . . . . 5. Well located proper distance from drilling unit boundary. 6. Well located proper distance from other wells.. . . . . . . . . 7. Sufficient acreage available in drilling unit.. . . . . . . . . . . 8. If deviated, is well bore plat included.. . . . . . . . . . . . . . 9. Operator only affected party.. . . . . . . . . . . . . . . . . . 10. Operator has appropriate bond in force. . . . . . . . . . . . . 11. Permit can be issued without conservation order. . . . . . . . 12. Permit can be issued without administrative approval.. . . . . 13. Well located wlin area & strata authorized by injection order #_ 14. All wells wlin y.. mile area of review identified. . . . . . . . .. APPR DATE bL ~2-. (Service Well Only) (Service Well Only) ENGINEERING APPR DATE ltJ Gk- Jillb'2.. (Service Well Only) GEOLOGY APPR DATE t/L- d¿:2- (Exploratory Only) 15. Conductor string provided. . . . . . . . . . . . . . . . . . . 16. Surface casing protects all known USDWs. . . . . . . . . . . 17. CMT vol adequate to circulate on conductor & surf csg. . . . . 18. CMT vol adequate to tie-in long string to surf csg. . . . . . . . 19. CMT will cover all known productive horizons. . . . . . . . . . 20. Casing designs adequate for C, T, B & permafrost. . . . . . . 21. Adequate tankage or reserve pit.. . . . . . . . . . . . . . . . 22. If a re-drill, has a 10-403 for abandonment been approved. . . 23. Adequate wellbore separation proposed.. . . . . . . . . . . . 24. If diverter required, does it meet regulations. . . . . . . . . . 25. Drilling fluid program schematic & equip list adequate. . . . . 26. BOPEs, do they meet regulation. . . . . . , . . . . . . . . . 27. BOPE press rating appropriate; test to '-I ~C?O psig. 28. Choke manifold complies w/API RP-53 (May'é4). . . . . . . . 29. Work will occur without operation shutdown. . . . . . . . . . . 30. Is presence of H2S gas probable.. . . . . . . . . . . . . . . . 31. Mechanical condition of wells within AOR verified. . . . . . . . 32. Permit can be issued wlo hydrogen sulfide measures. . . . . 33. Data presented on potential overpressure zones. . . . . . . . 34. Seismic analysis of shallow gas zones. . . . . . . . . . . . . 35. Seabed condition survey (if off-shore). . . . . .. ...... 36. Contact namelphone for weekly progress reports. ...... 4~~1 PROGRAM: Exp _ Dev X Redrll_ Re-Enter _ Serv _ Wellböre seg_ GEOL AREA ~/ ~ UNIT# I/...<)ðc> ON/OFF SHORE ..J!:J.fi.C I0N Y N Y N Y N Y N Y N Y N YIN Y N Y N Y N \VN ~ ;^J~A\ ~~1 ,<~;h e-1-LRc. ç ~~¡JJ, or' ~ ~ E .¥-N- ¡"lit- @N . * Y N Wli.J<.I/~ý ~~u..¿'-"t-~,Q , (£ N fIIl~ Mþ.fV I ~ pp,? ~~MÇt' ~~N fI;; . y£Y -¥--tf Ail If- ~ ~ JtJ..-4 y. N N . . GEOLOGY: PETROLEUM ENGINEERING: RESERVOIR ENGINEERING UIC ENGINEER COMMISSIONER: Comments/Instructions: RP~ TEM JDH JBR COT DTS / If; 2../ 0 z.. /' SFD WGA MJW MLB ~ 11/8"/0z-. Rev: 1 0/15/02 - G:\geology\permits\checklist.doc - e Well History File APPENDIX Information of detailed nature that is not particularly germane to the Well Permitting Process but is part of the history file. To improve the readability of the Well History file and to simplify finding infonnation, information of this nature is accumulated at the end of the me under APPENDIX. No special effort has been made to chronologically organize this category of information. I I I I I I I I I I I I I I I I I I I spe~~v-sun C R I L..L.I N G 5 E R V I c: E 5 BP EXPLORATION (ALASKA), INC. END OF WELL REPORT NORTHSTAR NS 21 ¡}..O;).- ~(g I I I I TABLE OF CONTENTS I I 1. General Information I 2. Daily Summary 3. Daily Operations I 4. Show Reports I 5. Morning Reports 6. BHA's I 7. Bit Record I 8. Mud Reports 9. Survey Record I 10. Formation Tops I 11. Formation Evaluation Logs I I I spe.....,l~v-sun I I:JRII...I...INI:i SER\iIt:E!:ii I I I I I I I I I I I I I I I I I I I I I GENERAL WELL INFORMATION Company: Rig: Well: Field: Borough: State: Country: API Number: Sperry-Sun Job Number: Job Start Date: Job End Date: North Reference: Declination: Dip Angle: Total Field Strength: Date Of Magnetic Data: Wellhead Coordinates N: Wellhead Coordinates W: Vertical Section Azimuth: SDL Engineers: Company Representatives: Company Geologist: Lease Name: SSDS Unit Number: State: Borough: BP Exploration Alaska Nabors Alaska Drilling No. 33-E Northstar NS21 Northstar North Slope Alaska United States 50-029·23126-00 AK-AM·0002978824 Nov 16,2002 Apr 25, 2004 True 26.135 deg 80.949 deg 57548.157 nT Nov 30, 2002 North 70 deg 29 min 28.666 sec East 148 deg 41 min 35.919 sec 309.860 deg Doug Wilson Reg Wilson Mark Undloff Tom Mansfield Wayne Hermanson Gavin Kidd Bob Clump Joe Polya Mike Dinger Ken Lemley Northstar 107 Alaska North Slope NOTE: Begin Drilling 14:00 hrs 11/16/2002. Mud Loggers not on location due to Island Population constraints. Began mud logging at 10:57 hrs 11/16/2002 at 4184'. Surface hole drilled to 4621' and move off NS 21 at 23:59 hrs 11/20/2002. Remainder of hole completed between 00:00 hrs 03/04/2004 and 12:40 hrs 04/16/2004, from 4184' to 22261'. spe......r...y- sun !:JRI L.L.I N ~ 5e 1'\\11 c: e:!iii I I I I I I I I I I I I I I I I I I I North Star NS21 Well Summary 11/16/02 Move rig from NS-19 to NS-21 - accept rig at 03:00 hrs. berm rig. Nipple up surface riser. Mix mud, change out pump liners, change shaker screens and test gas alarms. RIG UP Gyro equipment. Make up BHA #1. Ream conductor and drill ahead running gyros every 100' to 770'. 11/17/02 Drill 16" surface hole from 770' to 1560' md. Confirmed MWD surveys with Gyro. Final Gyro survey @ 1455' md - 1435.2' TVD; Incl21.76°, Azimuth 323.59°, DLS 3.86°/100'. Drill and slide in build section of 16" surface hole from 1560' md to 3100' md. ROP 100 - 400 fph. Increase total flow from 760 gpm to 1060 gpm in 100 gpm increments. No screen blinding occuring. Flow running between 58-62%. Pumping 25 bbls HiVis red mud sweeps every 400'. Adding Condet and BDF-263 for clay inhibition. Maintaing 9.1 ppg MW with YP>40 and annular velocity of 100-125 ft/min. 11/18/02 Drill ahead 16" surface hole from 3100' to 4184'. Sperry Sun on location 10:57 hours. Begin logging at 4184' MD. Maximum gas 27 units. Top of SV6 4180' MD, 3063' TVD. Total depth of 16" hole at 4620' MD, 3215' TVD. 11/19/02 Wiper trip hole. Run in the hole with 13 3/8" casing. 11/20/02 Cement casing and pressure test. Nipple up and test tree. Release rig at midnight 03/04/04 Move rig to NS21. Begin to rig blocks to 12 lines. 03/05/04 Continue to rig blocks to 12 lines. Nipple down dry hole tree and nipple up BOPE. Test BOPE. 03/06/04 Center rig floor over hole. Rig up riser and choke. Handle 5" drill pipe. 03/07/04 Handle 5" drill pipe and 5 7/8" drill pipe. 03/08/04 Continue to handle 57/8" drill pipe. Make up bottom hole assembly and run in the hole. 03/09104 Continue to run in the hole to 4448' MD. Wash to 4521' MD. Circulate bottoms up and test casing to 3400 psi for 30 minutes. Drill out float collar and cement to 4604' MD. Displace hole to 8.6ppg mud. Drill out cement and 20' new formation to 4641' MD. Perform formation integrity test to 12.5ppg. Drill ahead to 6542' MD, 3916' TVD. Top of SV5 @ 4882' MD, 3316' TVD, Top of SV4 @ 5724' MD, 3622' TVD. Maximum gas 147 Units @ 6066' MD. 03/10/04 Drill ahead from 6542' to 9472' MD. Top of SV2 @ 6800' MD ,4020' TVD. Top of SVl @ 7848' MD, 4407' TVD. Top of UGNU @ 8830' MD, 4755' TVD. Maximum gas 452 units @ 9054' MD. 03/11/04 Drill ahead from 9472' to 11833' MD. Maximum gas 694 units @ 10930' MD 1 I I I I I I I I I I I I I I I I I I I North Star NS21 Well Summary 03/12/04 Drill ahead from 11833' MD to 13660' MD. Top of SCHRADER BLUFF @ 13182' MD, 6305' TVD. Maximum gas 204 Units @ 13335' MD 03/13/04 Drill ahead from 13660' MD to 15870' MD. Top of COLVILLE @ 15005' MD, 6963' TVD. Maximum gas 572 Units @14245' MD 03/14/04 Drill ahead from 15870' MD to 16018' MD. Pull out of hole for bit. Maximum gas 144 Units @ 15397' MD. 03/15/04 Continue to pull out of the hole. Lay down bottom hole assembly. Rig up for BOPE test. 03/16/04 Test BOPE. Make up bottom hole assembly and run in the hole. 03/17/04 Continue RIH, Wash last 8 stands down. Drill ahead to 16515. Pumps down, repair pumps. Drill ahead. 03/18/04 Drilled ahead to 18934'. 03/19/04 Drilled to 19355'. Circulated weighted sweep. POOH to 14522'. UD single 5" DP w/ washout. RIH to bottom at 19355'. Circulated weighted sweep. Short trip gas was 38 units. Prepared to weight up mud to 10.2 ppg w/ spike fluid. 03/20/04 Weighted up mud to 10.2 ppg. Drill ahead fr om 19355' to 20109'. Began seeing as much as 3440 units of connection gas from 19646' on with 10.3 ppg mud. Noticed pressure loss from pump #2. Began repair on pump #2. Topped Kalubik @ 19400' MD, 8761' TVD, Kuparuk C sand absent due to faulting. Kuparuk A topped @ 19961' MD, 9146' TVD. 03/21/04 Repair fluid end on #2 mud pump. Drill with RSS from 20109' to 20227' md- Geologist picked top of Miluveach @ 20183' md /9320' tvdrkb - 44' of rathole in Miluveach. Reduced rotation to 130 rpm to compensate high torque of 40K ft Ibs and added lubricant to maintain concetration @ 4.5% to manage torque & drag. Pumped 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep. Wiper tripped to 19067' md - overall good trip. Circulated and conditioned mud while cleaning hole in preparation for casing run - trip gas 3100 units. 3/22/04 Continued circulating 2nd 45 bbllow vis followed by 50 bbl 3.0 ppg over MW weighted sweep - minimal cuttings back to surface. Monitor well - losses 2 bbls/hr while static. POOH from 20227' to 13800' - trip was good with occasional overpulls to 45K due to cuttings beds between 18500' & 17000'. Spot 150 bbl LCM pill @ 13800' (10 ppb steel seal & 5 ppb barofibre). POOH from 13800' to 4985'. Tight spot @ 4985' - pump & backream from 4985' to 4953'. POOH to shoe at 4572'. Circulate bottoms up @ 7 BPM, 1100 psi, 80 RPM. RIH to 5100' to ensure tight spot cleaned up. POOH to 4572'. Slip & cut 170' drilling line. Service top drive, drawworks & crown. Static losses 2.5 bblslhr. Circulate EP mud lube sweep around & discard @ surface. POOH to BHA. 2 I I I I I I I I I I I I I I I I I I I North Star NS21 Well Summary 3/23/04 Lay down BRA # 4 - bit in good shape graded 0-0. Pull bowl protector, install test plug, change out upper rams to 9 5/8" & test door seals. Lay down testing equipment. Rig up 9 5/8" casing handling tools. Run jts 1 - 112 of 9 5/8" 47# L-80 Mod Butt. to 13 3/8" shoe @ 4,621 ft with 3 bbls/hr mud losses. Circulate @ shoe staging up pump from 1 to 10 bbls/rnin & circulate bottoms up. Run jts 113 to 153 with 3 bblslhr mud losses. Getting pick up weights every 10 jts. 3/24/04 RIH with 9 5/8",47#, BTC-M, L 80 casing to 20,164 ft. Controlled running speed through out entire run. Lost returns @ 19,360 ft. Slack off weights slightly below model. Make up mandrel hanger. Land casing at 20207' with 170k hook load on the hanger. Rig down fill up tool. Make up cement head & surface circulate lines. Circulate casing staging pumps up to 1.5 bbls/rnin @ 1130 psi. 3/25/04 Continue staging up pump & circulate prior to cement job - 0.5 to 3.0 bpm before backing off to 1 bpm & regaining returns (had losses throughout circulation starting @ 0.5 bpm). Pump 5 bbls sea water & test lines to 3500 psi. Pump 50 bbls 11.2 ppg weighted spacer & dropped bottom plug. Pumped 838 bbls (1452 sx) 11.2 ppg Class G lead slurry followed by 143 (700 sx) 15.9 ppg Class G tail cement. Dropped top plug & washed up with 25 bbls sea water from ROWCO on top of plug. Swapped to rig pump for displacement. Lost 900 bbls while pumping 1056 bbls spacer, cement & sea water. A vg 12% returns. Displaced cement with 10.3 ppg mud @ 10 bpm. Lost 730 bbls while displacing with 1448 bbls - avg 51 % returns. Pumped 94% pump efficiency plus 1/2 shoe track & did not bump plug. Bled off pressure & checked floats - floats held. Rigged down landing joint & cement head. Installed pack-off & tested to 5000 psi. Changed out sweeps, removed casing handling equip't from floor & rigged down pack- off running tools. Rigged up kill line to pump down 13 3/8" X 9 5/8" annulus. Tested lines to 2500 psi. Pumped down annulus with 10.3 ppg @ 1 bpm until pressure broke over @ 450 psi. Increased rate to 4 bpm for a total of 275 bbls - final casing pressure 270 psi. Changed out top rams to 4 1/2" X 7" variables and rigged up kill line to stack. Rigged down 500T bales & installed iron roughneck track. Rigged up test equip't, set test plug and filled stack. Tested BOP's per BP I AOGCC regs. 250 psi low I 4800 psi high. Tested annular preventer 250 low / 3500 high. Tested BOP's with 5" & 57/8" testjts & tested 5" & 57/8" floor valves. 3/26/04 Rig down & blow down BOP test equip't. Change out dies on top drive back up wrench. Install bales & elevators. Make up BRA & surface test equip't. Note: Bias unit did not test, therefore lay down & found rag in control collar. Removed rag & retested on surface - okay .Load source in ADN. Freeze protect 13 3/8" x 9 5/8" annulus with 125 bbls diesel out of critical path. RIH wi 5" DP. Pick up 48 singles from pipe shed & RIH. Change out bales & elevators to 57/8". Cut & slip drilling line. Service top drive, draw works & crown. RIH with 5" DP. 3/27/04 Continue RIH to 19435'. Wash down from 19435' to float collar @ 20125'. Tag cement stringers @ 20011' & tagged plugs @ 20065'. Circulate in preparation for casing test. Rig up to & test casing to 4000 psi with 10.3 ppg & hold for 30 min. Drill plugs & float collar @ 20125'. Add spike fluid & wt up to 12.5 ppg while drilling shoe track. Drill shoe & 20' new hole to 20247'. Conduct FIT to 15.0 EMW with 12.5 ppg mud. Drill 8 1/2" hole from 20247' to 20262'. Increase 3 I I I I I I I I I I I I I I I I I I I North Star NS21 Well Summary flow rate to 550 gpm, open Rhino reamer. Check that blades opened. Drill 8 1/2" hole opened up to 91/2" with Rhino reamer from 20262' to 20565'. 3/28/04 Control drill 8 1/2" hole and open up to 9 1/2" with Rhino reamer from 20565' to 21599'. 3/29/04 Drill ahead in 8 1/2" hole opened up to 9 1/2" hole w/ Rhino reamer to TD @ 21985' MD. Pumped weighted Barofibre sweep @ 21750' with 25% increase in cuttings on bottoms up. Incurred losses while drilling last 11' of Sag. (240 bbls). Circulate LCM pill for losses in Sag. POOH from 21985'to 20020'. Pulled wet & did not pump out. Trip out was excellent. No overpull - no swabbing. Circulate @ shoe to condition mud & check for losses. No losses while pumping @ 8.5 bpm but when increased to 9 bpm incurred 50 bph losses. Monitor well - well static. Rill - trip was excellent - took 40k drag @ 21,140' wiped once & it cleared up - no fill @ TD. Pump HiVis Barofibre sweep 1 stand off bottom @ 350 gpm, 2100 psi, RPM 110. Losses of 15 bph increased to 100 bph - back off rotary to 30 RPM, 5 bpm. Losses still @ 100 bph. Spot LCM pill @ TD. 3/30/04 Spot LCM pill at 21,985'. POOH 7 stands, above the pill. Pump out to the shoe at 20,227'. Monitor well at shoe. POOH and lay down 48 joints of 5" DP. POOH to 510' - 20k lbs over pull. Rill tag lOk down to confirm. POOH to 300'. Rill to 474', stack up 15k - suspect casing backed off at 474'. Finish POOH. Lay down BRA #5. 3/31/04 Lay down BRA. Rig up & Rill with Retrievable Bridge Plug (RBP). Set at 1,521' MD. Dump sand into drillpipe and pump down hole to protect fish neck. Circulate 9.0 ppg into well to displace diesel. Pull wear ring & packoff. Rig up to pull 9-5/8" casing. Pull 406.90' (10 jts) 9- 5/8" casing. Last jt had collar on it with pin looking up in hole. Casing pulled with no overpull. Rig down 9-5/8" casing. Pick up 5" equipment. Test kill line. Blow down all mud lines. Make up back off tool. Rill to 505' with 5" DP, DC's, BOT, and HWDP. Fill every stand with seawater. Change out to long bales. Set dogs with 1500 psi and 3000 psi pressure increase (top at 505' MD; bottom at 531' MD). Attempt to back out with various pressures and trouble shooting. Blow down all mud lines. Change out to short bales to POOH. POOH with back off tool. Lay down back off tool. Some broken dogs, re-runnable. Make up 10 3/4" stop ring to tag top of fish. Rill with stop ring. Tag top of fish at 455' MD. POOH with stop ring. Lay down same. 4/01/04 Rill to backout 9-5/8" casing. Spaceout & back out casing. Set top dogs at 480'; bottom dogs at 506'. Joint backed out with 1200 psi. Obtained 1/4 to 1/8 revolutions each cycle - 4 total turns. POOH & lay down BHA. Pick up spear/grapple assembly & Rill. POOH. To pick up a mule shoe, because grapple did not engage, suspect may not be entering casing. Rill to contniue backing out fish. Attempt to engage fish. Did not appear to engage. Begin to POOH, spear immediately caught fish and released. Stop job, inspect equipment and repair as required. Continue to POOH. Grapple not left in hole. Redress fishing equipment with grapple / spear & Rill. Engage fish. Back out with 7 turns. POOH. Lay down spear and casing. Half of the initial spear found in casing joint, rest is left in hole. Casing joint in good condition. No damage to threads. Rig up to run casing. RIll with 9-5/8" 47# BTCM casing -12 joints total, with one 5' pup (buried). Sting into casing stub. Work torque down. Took over 75 revolutions to work torque into pipe. Anticipating 11 revs. Test caing to 3000 psi for 10 minutes. Blow down all mud lines 4 I I I I I I I I I I I I I I I I I I I North Star NS21 Well Summary & top drive. Pump out casing using G&I to drop fluid level for spill prevention during casing cut. Nipple down BOPE. Pull 350k actual on casing (420k on weight indicator). Casing took 4.5' of stretch. Set emergency slips. Rough cut casing. Lay down same. Cut casing stub 9.33' long. Nipple down riser. Move BOPE out of the way for final cut. 4/02/04 Set back BOP. Set packoff, test, nipple up BOP. Pickup fishing BRA., Junk basket and Run in hole to 1500. Wash down to RBP (Retrievable Bridge Plug) at 1521' MD- no indication of junk. Pull out of hole. Run in hole with same BRA, work over fishing neck of RBP. Spud on fish-showing reactive torque. Mill on junk! top of RBP. Flow check and pull out of hole ( Fingers missing, Bum shoe 100% worn and all indications that junk is broken up. Run in hole with reverse circ basket-circulate, pull out of hole. Minimal junk in basket. Run in hole with junk basket and Packer retrieval assembly. Pull out of hole with RBP. 4/03/04 Laydown RBP and BRA. Test BOP. Cut and slip drilling line. Service top drive and repair brakes and RPM. Change out wash pipe on top drive. 4/04/04 Change out wash pipe on top drive. Pull test plug and install wear ring. Pickup BRA # 17. (8 ~ "open hole c1eanout assembly). Test MWD. Run in hole to 5479' MD at 60 fpm. Circulate and condition mud at 5479' MD for one bottoms up. Maximum gas 116 units. Run in hole to 10205' MD at 60 fpm. Circulate and condition mud one bottoms up. Maximum gas 72 units. Run in hole to 14638' MD at 45 fpm. Circulate and condition one bottoms up. Maximum gas 111 units. 4/05/04 Run in hole to 20070' MD with 5 7/8" drill pipe at 456 fpm. Circulate and condition mud until MW in = MW out. Maximum gas on circulation 258 units. Replace Top drive brake and RPM indicator while circulating. Run in open 8 W' hole to 21945' MD ( 12' into Sag River formation) at 45 fpm- No tight hole, indication of losses or fill. Took 20K drag at 20825' MD- worked without problems. Pull out of open hole to 20070' MD at 45 fpm- No pumping or rotation required. Pickup weights less than predicted by PERFORM engineer, with overpulls occurring beginning at 20850' MD until 20300' MD, which correlates to BRA being pulled through 2° dogleg. Minimal overpull observed afterwards. Monitored well for 10 minutes. Pulled out of hole at 45 fpm from 20070 to 16008' MD. 4/06/04 Continued pulling out of hole. Finished POOR and UD BRA. Maked up 7" liner running equipment. CBU one liner volume. RIH with 7" liner on 5" drill pipe. 4/07/04 Continue to run 7" liner in hole. 55 units of trip gas max while circulating at the shoe. Circulated at shoe with max gas of 55 units at bottoms up. Continue running 7" liner. 4/08/04 Washed the last three stands down, circulated liner, increasing rate slowly. Cemented liner with no mud losses. Maximum gas while circulating was 326 units. Set hanger and packer. Top of liner set at 19946' MD, 9134' TVD. Bottom of liner set at 21945' MD, 10902' TVD. Received back 25 bbls of excess cement. Slipped and cut drill line. POOH. 5 I I I I I I I I I I I I I I I I I I I North Star NS21 Well Summary 4/09/04 Completed POOH. Tested BOPE, made up BHA and tested tools. Rll-I and pick up 4" drill pipe. 4/10/04 Completed Rll-I. Washed down last two stands. Drilled float equipment. Ran centrifuges to cut mud weight and displaced well to 9.1 ppg. Began drilling shoe. 4/11/04 Drilled through shoe and old hole to bottom. Encountered junk. Attempted to drill up junk. Unable to drill past junk. POOH. Slipped and cut drill line. Laid down BHA. 4/12/04 Rll-I, Circulated @ shoe. Ran to bottom and washed over fish. CBU with max TG of 315 units. Worked Fishing tool down. POOH. 4/13/04 Finished POOH. Recovered 3 Ibs of junk. P/u BHA #20 and RIH with the same. 4/14/04 Finished Rll-I. Washed down the last 2 stands. Tagged up without encountering any metal. CBU with TG peaking at 691 units. Pumped dry job and POOH. Prepared to test BOPE. 1/3 lb. Of metal in junk basket. 4/15/04 Tested BOPE. Rll-I. Near bottom and breaking circulation at report time. 4/16/04 Finished Rll-I. Trip gas was 217 units. Drilled ahead to 22005' and performed FIT to 11.5 ppg EMW. Drilled to TD at 22261'MÐ, 11207'TVD. SHUBLIK @ 21994'MÐ, 10949' TVD. IVISHAK @ 22125'MÐ, 11075'TVD. Circulated four OH vols. Mad passed to shoe. Rll-I, circulated 100 bbls of mud to clean open hole. POOH to space PBL at top of 7" liner. POOH from 22261' to 21242', hole fill was off. Monitored well. Rll-I to bottom and pumped 1000 strokes. Pumped out of hole to 21917' at 84 spm. CBU at 84 spm with a maximum gas of 9984 units. Continued circulating. 04/17/04 Finished circulating out gas (maximum of 9984 units). RIH to bottom at 22261 '. Pumped out of hole to 21917' with 70 spm. Increased mud weight to 9.6 ppg while circulating at 84 spm and a rotary of 50 rpm with a maximum gas of 503 units at bottoms up. Rll-I to bottom and circulated 1000 strokes. Pumped out of hole to 21917'. Circulated bottoms up with a maximum gas of 192 units. Monitored the well, static. Continued pumping out of the hole at 50 spm. 04/18/04 Continued pumping out of hole with 57/8" DP. POOH with 5" DP. UD 4" DP and BHA. Rll-I w/4 1/2" liner. 6 I I I I I Time Elapsed (hrs) Time 11/16/2002 00:00-01 :30 1.50 01:30-03:00 1.50 03:00-05:00 2.00 05:00-07:00 2.00 07:00-08:00 1.00 08:00-10:00 2.00 10:00-11 :00 1.00 11:00-12:00 1.00 12:00-13:00 1.00 13:00-14:00 1.00 14:00-14:45 0.75 14:45-15:00 0.25 15:00-16:30 1.50 16:30-17:00 0.50 17:00-19:00 2.00 19:00-19:30 0.50 19:30-19:45 0.25 19:45-20:00 0.25 20:00-20:30 0.50 20:30-20:45 0.25 20:45-21: 15 0.50 21:15-21:30 0.25 21 :30-22: 15 0.75 22: 15-22:30 0.25 22:30-00:00 1.50 I I I I I I I I I I I I I I 11/17/2002 00:00-12:00 12.00 12:00-00:00 12.00 11/18/2002 00:00-17 :30 17.50 17:30-20:00 2.50 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown PJSM for rig move at Pre-tour meeting. Prep for rig move. Open electrical breaker, function moving system, prep cellar, etc. Move rig from NS-19 to NS-21. Shim up SE corner. Run stand of 5" DP through bushings. Level up more. (Accept rig @ 03:00 hrs.) Berm rig, set steps & landings. Clean cellar. Nipple up surface riser. Install turn buckles, floor track & mousehole. Test ESD. Mix mud, change out liners on #1 pump, finish placing screens on shakers & test gas alarms. Bring up BRA, gyro tools & Schlumberger sheaves to rig floor. Service Top Drive. PJSM for making up BRA #1. PJSM for Gyro rig up. Pre-spud meeting. Make up BRA #1. Ream to bottom of conductor@ 201 'md. Drill ahead 16" hole to 21Tmd. Run Gyro. At 201' md: Azimuth= 295.25° / Incl= 1.97° Drill ahead from 211' to 330' md. Pump sweep. POOR from MWD to pick up BRA #2. Make up BRA #2. RIB with 5" RWDP. Drill ahead 16" hole from 330' to 358' md. Pump red mud sweep. Run Gyro at 350' md: Inc= 2.13°, Azmth= 302.86°, DLS= 0.50°/100' Drill ahead 16' hole from 358' to 460' md. Pump red mud sweep. Run Gyro at 450' md: Inc= 2.24°, Azmth= 321.94°, DLS= 1.01 °/100'. Drill ahead 16" hole from 460' to 549' md. Pump red mud sweep. Run Gyro at 500' md: Inc= 2.06°, Azmth= 334.94°, DLS= 1.03°/100'. Drill ahead 16" hole from 549' to 639' md. Pump red mud sweep - Out of gravels at -500' md. Run Gyro at 600' md: Inc= 3.84°, Azmth= 335.72°, DLS= 1.92°/100'. Drill ahead 16" surface hole from 639' to 770' md. Drilling Parameters: Total Flow= 710 gpm with 1150 psig; WOB= 15 Klbs; 30 rpm with 5K-Ibs torque; ROP from 170 fph to 300 fph. MW= 8.9 ppg with 134 vis. Drill ahead 16" surface hole from 770' md to 1560' md. Confirmed MWD surveys with Gyro. Final Gyro survey @ 1455' md - 1435.2' TVD; Incl21.76°, Azimuth 323.59°, DLS 3.86°/100'. Drilling Stats: ROP 100-400 fph; WOB = 35 K lbs; 30 rpm with 6 K-Ibs torque & total flow of 760 gpm with 1500 psig. Drill & slide in build section of 16" surface hole from 1560' md to 3100' md. ROP 100- 400 fph. Increase total flow from 760 gpm to 1060 gpm in 100 gpm increments. No screen blinding occuring. Flow running between 58-62%. Pumping 25 bbls hi vis red mud sweeps every 400'. Adding Condet & BDF-263 for clay inhibition. Maintaing 9.1 ppg MW with YP>40, FV 100- 125 ft/min. Drill ahead 16 surface hole from 3100' md to casing pt 4621' md. - At 3400' md, trending to drop 2 degl100' while rotating. Continuous inclination showing drop on attempts to slide also. Reduce flow from 1050 to 800 gpm & get back on track- able to build again. At 3615' md, start increasing total flow again. DD able to maintain inclination at higher flow rates. Work rate up to 920 gpm At 3862', lost pulsation dampner on #2 pump & unable to maintain GR signal - still able to pump up survey at connection. Stagger pumps 125 spm & 75 spm on pumps 1 & 2, respectively. Regained GR signal. ROP averaging 160 fph - slowed down in SV as is typical. At TD, pump 100 bbls red mud sweep surface to surface. Large amounts of excess returned with sweep. Continue cirulating another bottoms up. Returns cleaned up significantly. 1 I I I Time Elapsed (hrs) Time 20:00-22:30 2.50 22:30-00:00 1.50 11/19/2002 00:00-01:30 1.50 01:30-04:00 2.50 04:00-04:30 0.50 04:30-06:30 2.00 06:30-07:30 1.00 07:30-08:00 0.50 08:00-10:30 2.50 10:30-11 :00 0.50 11:00-13:00 2.00 13:00-14:00 1.00 14:00-22:00 8.00 I I I I I I I I 22:00-22:30 0.50 22:30-23:00 0.50 23:00-00:00 1.00 11/20/2004 00:00-01:30 1.50 01 :30-05:30 4.00 I I I I I I 05:30-06:00 06:00-07 :45 07:45-09:00 09:00-09:30 0.50 1.75 1.25 0.50 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Wiper trip to 540' md - No troubles. Max drag 25-40 Klbs through slides. Hole in good condition. Stabilizers are evidently balled with clay some swab occuring. RIH to 4000' md by midnight - no hole trouble. TIH on wiper trip to 4621' md - hole in good shape. Avg SOW was 115 to 125K. SOW reduced to 80K going through 2 deg dogleg @ 3300' md. Wiped. Pump 130 bbl red mud sweep & circulate bottoms upx2 (21500 stks). Hole unloaded substantial amount of wall cake & cuttings from the start of circulation. Cleaned up noticeably during second bottoms up. Montior well, POOH 5 stands & pump dry job. Blow down top drive. PUW 165 & SOW 135K. POOH to HWDP - noticeable amount of clay on top of all tool joints. 30K overpull pulling up through dog leg at 3300'md. Overall drag was 15-25K compared to 25-40K for first wipe (-37% reduction in drag). POOH with 9 stands ofHWDP + Jars. Clean up rig floor & set up to handle BHA4,621 PJSM - LD BHA. Noticebly large amount of clay on top of all stabilizersl. Clean rig floor & put away BHA handling tools. PJSM - Rig up casing running equipment & Franks Fill-up Tool. Make up Float Track. Engaged Fill-Up Tool & checked floats. Float track = , Its 1 &2, FC & It 3 all Bakerlocked. Circ 300 strokes through FE. RIH with 107 jts of 13-3/868# L80 Buttress Casing (110 joints total). Casing stacked to 80K (top drive weight) for 8 joints while running through the bottom of the build section - pick up & worked through. Stacked up twice while running through dogleg @ 3300' md. No problems noted running remaining joints. Make up Hanger & both sections landing joint - land hanger. No fill & no problems. Did not require washing to bottom. Rig down Franks Fill-Up Tool, blow down top drive & make up cement head. Establish circ @ 0.5 bpm & gradually increase rate to 10 bpm. No problems packing off & no losses. Circulate 12500 strokes total in prepartion for cement job. Final circulation rate of 11 bpm @ 510 psig with no losses. PJSM for cement conducted with rig personnel. Discussed bumping plug with brine, Citric acid additions & notify control room. Pressure test cement lines to 3000 psig. Pump Cement Job as per plan: Pump 75 bbls 10.5 ppg Alpha Spacer. Drop bottom plug. Mix & pump 620 bbls (837 sxs) of 10.7 ppg Lead cement - 200%excess. Pump rate average 7 bpm with 150 psig & 35% returns- no losses. Switch to tail cement 102 bbls (498 sxs) @ 15.9 ppg - 50% excess. With 50 bbls tail cement pumped lost returns briefly on packoff. Regain full returns after pressuring up. Continue pumping tail. Drop top plug & flush lines with 25 bbls Sea water from HALCO. Displace with rig pump @ 9.5 bpm to 10 bpm with 9.4 ppg NACL brine. Slow displacement rate to 8 bpm @ 4478 strokes when ALPHA spacer back to surface. Alpha spacer thickness causing backup on drag chain. Jet with water periodically - levels are dropping. At 4500 strokes, good lead cement to surface. Increase rate to 9 bpm. At 6200 strokes, slow rate to 5 bpm with 980 psig circulation. Bump plug to 500 psig over with 6445 strokes (96.5 %) - 646 bbs on HALCO meter. Hold for 10 min pressure test. Bleed off. Check floats. Estimated 200 bbls Lead cement back to surface. blow down lines. Rig down cement head. Flush & drain stack. LD P Break pup jt from Landing jt. Rig down casing running equipment. Clean Floor. Change bails & elevators. 2 I I I Time Elapsed (hrs) Time 09:30-12:00 2.50 I 12:00-15:00 3.00 15:00-15:30 0.50 15:30-16:30 1.00 I 16:30-17:00 0.50 17:00-20:30 3.50 20:30-21 :30 1.00 21 :30-22:00 0.50 I 22:00-00:00 2.00 3/4/2004 I 00:00-03:00 3.00 03:00-08:00 5.00 08 :00-11 :00 3.00 I 11:00-12:00 1.00 12:00-00:00 12.00 I 3/5/2004 00:00-00:30 0.50 00:30-02:00 1.50 I 02:00-04:00 2.00 02:00-04:00 2.00 I 04:00-06:00 2.00 06:00-08:30 2.50 08:30-11 :00 2.50 I 11:00-15:30 4.50 15:30-17:30 2.00 17:30-23:00 5.50 I 23:00-00:00 1.00 3/6/2004 00:00-01:00 1.00 I 01:00-01:30 0.50 01 :30-02:30 1.00 02:30-04:00 1.50 I 04:00-06:00 2.00 06:00-07 :00 1.00 07 :00-11 :00 4.00 11:00-12:00 1.00 I 12:00-13:00 1.00 13:00-14:30 1.50 14:30-15 :30 1.00 I 15:30-17:00 1.50 17:00-18:00 1.00 18:00-21:00 3.00 I 21 :00-22:30 1.50 22:30-00:00 1.50 I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown PJSM. Slip & cut drilling line. RIH with Jars, TIW, HWDP, & 5 stands of DP to displace brine to make room for FP. Service Top Drive & Drawworks. LD landing joint. Clear & clean rig floor. ND riser. NU wellhead, Test QDC to 1200 psig, intstall valves & seep. Fill well with 20 bbls Diesel for/134'md ofFP. Set tubing handger & test to 5000 psig for 10 min. NU & test tree. Release Rig at Midnight. Move rig to NS21. Burm & shim rig. Accept rig at 0800 hrs March 4, 2004 Chink rig. Tighten Deadman. Re-install stairs. Rig up lines - Spool 2500' 5/8 line on draw works. Cut off drilling line. Removed 30' of drilling line core & replaced with 5/8 line. Braze weld every 2 feet. Feed line through sheave. Spool 1.3/8 line onto drawworks. Cut 5/8 line & spool off drawworks. Continue spooling off 5.8 string up line from drawworks. Slip on 1.3/8 drilling line. Load & prep 5.7/8 drill pipe in pipe shed. Polar Bear on island, no foot traffic outside rig or in cellar (cellar doors not closed due to tree in doorway). Production bleeding down wells in sub. Prepping cellar for BOP lift & rig leveling. Change out production sweeps on annulus. ND dry hole dry. Thaw ice plug from top of BPV. Level rig. While positioning rig floor, pulled air boot from flowline. PJSM - Change upper rams from 27/8" x 5" to 4 Yz" x 7". Pick up landing joint & pull hanger. Install test plug. Test BOPE to 250 psi low /4800 psi high. AOGCC rep Chuck Sheive to witness test. Pull test plug, drain stack, & blow down lines. Prep for rig floor skid. Skid rig floor 1 foot to the East. Rig down Koomy lines, choke & kill lines, & turn buckles. PJSM on rig move. Bleed wells in cellar, (valve frozen). Move I spot rig over stack. Roustabout changeout. Break for lunch / warmup. Repair flow line boot. Move drill pipe in derrick. Rig down floor equipment for installing riser. Install riser. Nipple up BOP koomey lines & mousehole. Test choke & kill line. Blow down all lines Pick up test joint & install wear ring. RIH with 5 non-grooved DP from Driller's side. Closed TIW to displace 35 bbls of diesel freeze protection fluid. Empty trip tank. Clean & fill with 9.4 ppg brine for POOH. POOH with 5 DP. RIH with non-grooved 5 open ended DP from off driller's side. POOH with 5 DP. 3 I I I Time (hrs) I 3/7/2004 00:00-02:00 02:00-04:30 I 04:30-08:30 08:30-12:00 I 12:00-13:00 13:00-17:30 17:30-19:00 I 19:00-20:30 20:30-00:00 3/8/2004 I 00:00-01:00 01:00-04:00 04:00-05:00 I 05:00-06:30 06:30-09:30 09:30-10:00 10:00-11 :00 I 11 :00-12:00 12:00-13:00 13:00-14:30 I 14:30-15:30 15:30-17:00 17:00-18:00 18:00-19:00 I 19:00-19:30 19:30-22:30 I 22:30-00:00 3/9/2004 00:00-03:30 I 03:30-04:00 04:00-05:00 05:00-06:00 I 06:00-08:00 08:00-09:00 09:00-09:30 I 09:30-10:00 10:00-10:30 10:30-18:00 I 18:00-18:30 18:30-00:00 I 3/10/2004 I Elapsed Time 2.00 2.50 4.00 3.50 1.00 4.50 1.50 1.50 3.50 1.00 3.00 1.00 1.50 3.00 0.50 1.00 1.00 1.00 1.50 1.00 1.50 1.00 1.00 0.50 3.00 1.50 3.50 0.50 1.00 1.00 2.00 1.00 0.50 0.50 0.50 7.50 0.50 5.50 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown POOH with 5 DP. Move 5 DP from driller's side to off driller's side to make room for the 5 7/8 DP. Clear floor & rig up 5 7/8 DP handling equipment While rigging up equipment, found that the elevators were too large for the eyes on the 350 ton short bails. Change out bails to 350 ton long bails for drill pipe management. RIH with 5 7/8 DP from pipe shed. Drift pipe & torque to 51k ftlbs. Service top drive & drawworks. RIH with 5 7/8 DP from pipe shed - drift & torque as before. Repair upper door hinge on iron roughneck. Continue to RIH with 5 7/8 DP from pipe shed - 135 total joints. POOH with 5 7/8 DP & rack back on driller's side. POOH with 5 7/8 DP & rack back on driller's side. RIH with 57/8 DP from pipe shed. Drift pipe & torque to 51k ftlbs. POOH with 5 7/8 DP & rack back on driller's side. Change out bails & elevators for 5 DP. RIH with 5 DP from pipe shed - drift & torque as before. Calibrate block height indicator for Schlumberger monitoring system. POOH with 5 DP to fill derrick. Clear floor. Service top drive. Replace weight indicator plate for 12 lines. Make up BHA #3, 12.1/4 drilling BHA. Rotary steerable &ARC / MWD with filter. Test MWD tools. Change out MWD. Blow down all surface circ lines. Continue to make up BHA #3. Stand back BHA#3 - top stabilizer caught in wear ring & could not pass through. Pull wear ring - no significant damage. Marks indicating where the stabilizer was hanging up. Continue to make up BHA #3. Change out stabilizer to 12 1/8 gauge, rather than new FG which is a bit over gauge (approx 12 1/20D). RIH with 5 DP from pipe shed. Drift on skate & torque to 30k ft-Ibs. Con't RIH with 12 1/4 bit on 5 DP from pipe shed. Wash as a precaution from 4,448 ft to float collar @ 4,521 ft. Circulate bottoms up. 932 gpm. 1800 psi. Test 13 3/868#, L 80 casing to 3,400 psi for 30 mins. OK. Review Dl, D2 & D5 drills with crew. Drill float collar & med hard cement to float shoe @ 4,604 ft. Displace well to 8.6 ppg mud @ 932 gpm, 2000 psi. clean out rat hole & 20 ft new formation to 4,641 ft. Circ & cond mud @ 932 gpm, 2000 psi. Perform FIT to EMW of 12.5 ppg at 3,210 ft TVD - 655 psi surface pressure with 8.6 ppg mud. Drill 12 1/4 directional hole 4,641' to 5,685' at 928 gpm; 1680 psi; llk TQ on btm; lOk TQ off btm; lOk WOB; PUW 160k; SOW 130k; Rot Wt 140k; ECD= 9.64; Cal ECD= 9.63 ppg. Service Can Rig top drive. Drill 12 1/4 directional hole 5,685 ft to 6,542 at 928 gpm; 1800 psi; 12k TQ on btm; Ilk TQ off btm; lOk WOB; PUW 170k; SOW 130k; Rot Wt 142k; ECD= 9.73; Cal ECD= 9.73 ppg. 4 I I I Time (hrs) 00:00-18:00 I I I 18:00-18:30 18:30-00:00 I I I 3/11/2004 00:00-18:00 I I I 18:00-18:30 18:30-00:00 I I I 3/12/2004 00:00-00:00 I I I I Elapsed Time 18.00 0.50 5.50 18.00 0.50 5.50 24.00 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Drill with RSS from 6542' - 8811' md. Notes: 1) Pumping 25 bbl HiVis sweeps with 10 ppb Barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. 2) Pumping 55 bbl sweeps weighted 3.0 ppg over mud weight with 4 ppb Barafiber. 3) Sweeps show signs of additional cuttings at shakers & some reduction in ECD - especially see evidence of sweeps across bit. 4) RSS responding to downlinks. Service Top Drive. Drill with RSS from 8811' - 9472' md. Notes: 1) Pumping 25 bbl HiVis sweeps with 10 ppb Barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. 2) Pumping 55 bbl sweeps weighted 3.0 ppg over mud weight with 4 ppb Barafiber. 3) Sweeps show signs of additional cuttings at shakers & some reduction in ECD - especially see evidence of sweeps across bit. Hit top ofUgnu @ 8749' md/4719' tvdrkb. 4) Correlating to the NS20 well geologically. 5) Not encountering as many hardstreaks as the NS25 well at this point. 6) RSS responding to downlinks. Drill with RSS from 9472' - 11358' md. Notes: 1) Sweeps as follows: a) Pumping 25 bbl HiVis sweeps with 10 ppb Barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Still correlating closely to NS20 well. 3) RSS responding to downlinks. Service Top Drive. Drill with RSS froml1358' - 11833' md. Notes: 1) Sweeps as follows: a) Pumping 25 bbl HiVis sweeps with 10 ppb Barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Still correlating closely to NS20 well. 3) RSS responding to downlinks. Drill with RSS from11833' - 13660' md - increasing lubricant concentration to address torque. Notes: 1) Sweep hole as follows. a) Pumping 25 bbl HiVis sweeps with 10 ppb Barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Geology correlating closely to NS18 & NS20 wells. 3) Approaching 30K ft. lb. torque limitation. 5 I I I Time (hrs) I I I 3/13/2004 00:00-00:00 I I I I I 3/14/2004 00:00-01:45 I I I 01:45-02:00 02:00-07 :00 I I I 07:00-08:30 08:30-09:00 09:00-13:00 I I Elapsed Time 24.00 1.75 0.25 5.00 1.50 0.50 4.00 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown a) Core Rig Team discussion with Perform Engineer to proactively address torque & compare modeling to actual drilling parameters to verify 6000' of 5 7/8 drill pipe is adequate. b) Address torque as follows: Open hole torque treat with Lubetex & EZ Glide while increasing lubricant concentration from 2.5% to 3.5%. Add addtional BDF to prepare system for EP addtions. Add 8 drums (0.5% EP Mud lube) to address the cased hole torque through the build. 4) RSS responding to downlinks. Drill with RSS from 13660' - 15870' md - increasing lubricant concentration to address torque. Notes: 1) Sweep hole as follows: a) Pumping 25 bbl HiVis sweeps with 10 ppb Barafiber every 500 feet. Adding additional 8 ppb medium walnut on alternating sweeps. b) Pumping 55 bbl sweeps weighted 3.0 ppg over MW. c) Sweeps show signs of additional cuttings at shakers. 2) Geology correlating closely to NS18 & NS20 wells. - Top Colville @ 15005' md /6963' tvd (35' above prognosis) 3) Managing torque as follows: a) Maintain Lubetex treatment @ 3.5%. b) Add addtional BDF to prepare system for EP addtions. c) Add 8 drums (0.5% EP Mud lube) in two applicatoins to address the cased hole torque through the build section. 4) RSS responding to downlinks. Drill with RSS from 15870' - 16018' md while adding lubricant to address torque. Notes: 1) Actual torque is matching the Engineer's Model. a) Required torque to drill with 1800 feet of 57/8 drill pipe picked up will be -29K ft. lbs. b) 34K ft. lbs. is the allowable surface torque to not exceed 30K ft. lbs at top of 5 dp. c) This provides -5K ft. lb. torque cushion when on bottom after trip to stay below to not exceed 30K at the top of 5 dp. 2) RSS responding to downlinks. Record Slow Pump Rates & Survey. Circulate & condtion in preparation for trip - ECD dropped from 10.15 to 9.75 ppg throughout circulation. Notes: 1) Pumped weighted sweep 3 ppg above MW surface to surface - no noticeable cuttings increase with sweep. Noticeable decrease in cuttings amount over shakers after surface to surface. 2) Pumped 2 addtional bottoms p. 3) Adding lubricants to achieve 3.3% as follows: Lubetex @ 1.5%, EP Mud Lube @ 0.5% & EZ Glide @ 1.3 %. 4) Adding 3% BDF 263 to enhance lubricant mix & 0.15% Condet to address sticky clays. Monitor well & POOH 5 stands wet. Pump dry job, blow down top drive & lines. POOH from 16018' - 11050' md. Notes: 1) Trip went withoug incident until the ghost reamer reached the Top of the Ugnu. 2) Ghost reamer packing off & swabbing while attempting to pull through the SV formation. 6 I I I Time (hrs) Elapsed Time I 13:00-14:15 1.25 I I 14:15-17:45 3.50 I I I 17 :45-20:00 2.25 I I 20:00-22:00 2.00 I 22:00-23:00 1.00 I I 23:00-23:30 0.50 23:30-00:00 0.50 3/15/2004 00:00-01:30 1.50 01:30-01:45 0.25 01:45-03:30 1.75 03:30-04:00 0.50 04:00-07:30 3.50 I I I I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown 3) Unable to wipe swab off & prevent swab. Rotate & reciprocate while circulating 9500 strokes @ 16 bpm (672 gpm), shut down pumps & attempt to POOH - still swabbing - decision to pump out of hole. Notes: 1) Encountering sticky clays in SV Formations above Ugnu - unable to wipe off or continue POOH with out swabbing - same thing happened on NS25 with ghost reamers. 2) Porcupine reamers on past Northstar wells seemed to eliminate the need to pump out of hole through SV Sands. 3) The tight hole in the SV & the inability of the ghost reamers to address it may be the result of the higher hole angle both the NS25 & NS21 wells than on past Northstar wells. Pump out of hole to 8200' md. Lost -96 bbls of mud to hole. Notes: 1) No rotation & pumping 480 gpm while POOH. a) Losing 2 bpm while pulling stand while pumping 480 gpm. b) Stopped moving pipe & decrease pumps to 285 gpm - losing 1 bpm . c) Shut down & monitor well with pumps off - static. 2) Determined clay is balling up around ghost reamer &/or BHA & pumping fluid away into the U gnu & Schrader Sands. 3) Decision to rotate & reciprocate while gradually increasing rate to drilling rate to clean BHA. Clean clay ball from ghost reamer & BHA. Notes: 1) Establish circulation & increase rate to from 285 gpm to 820 gpm while circulating bottoms p (14000 stks). 2) Rotating 130 rpm & reciprocating. 3) Observed substancial amounts of clay at shakers. 4) ECD decreased from 10.25 to 9.82 throughout circulation. Backream from 8200' to 7000' md with 820 gpm & 130 rpm to place ghost reamer inside surface casing shoe. Note: No noticeable losses or signs of packing off. Circ 1.5xBU at 820 gpm while rotating & reciprocating. Pull two stands - well not swabbing. Notes: 1) Rotating 130 rpm with 14K ft. lbs torque. 2) Considerable amounts of clay over shakers while circulating bottoms p from the casing shoe. 3) Cuttings amount decreased noticeably while circulating bottoms up from the bit. 4) ECD decreased from 10.1 to 9.65 throughout circulation. 5) Total 15000 strokes circulated. Monitor well, pump dry job & blow down top drive & lines. POOH to 6638' md - well not swabbing. POOH to 13 3/8 casing shoe - hole in good shape through interval backreamed with ghost reamer. Monitor well- hole taking fluid due to seepage into exposed SV, Ugnu & Schrader Sands. Slip & Cut 170' of drilling line - losing 8 bph to hole due to seepage. POOH while standing back 5 in derrick. 115 stands 5 ODS & 23 stands 5 on DS derrick. POOH while laying down 105 joints of 5 drill pipe in pipe shed. Notes: 1) LD Ghost reamer - about 12 1/8 gauge & in good shape with minor signs of wear on bottom of blades. 2) Ghost reamer lightly balled with clay. 7 I I I Time (hrs) Elapsed Time I 07:30-10:30 3.00 I I I I 10:30-11:00 11:00-14:00 0.50 3.00 14:00-20:30 6.50 I I I I 20:30-21 :30 1.00 21:30-22:00 0.50 22:00-22:30 0.50 22:30-23:30 1.00 23:30-00:00 0.50 3/16/2004 00:00-06:30 6.50 06:30-07:00 0.50 07:00-08:00 1.00 08:00-10:30 2.50 10:30-12:00 1.50 12:00-14:00 2.00 14:00-15:30 1.50 15:30-16:15 0.75 16:15-17:00 0.75 17:00-17:30 0.50 17:30-18:00 0.50 18:00-00:00 6.00 3/17/2004 I I I I I I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown 3) Keep 33 joints in pipe shed for RIH on top BHA to drill to 9 5/8 casing point @ 20,277' md. 4) Change 6 liners in pumps to 5 112. Lay Down BHA. Notes: 1) BHA lightly balled with clay. 2) Most of the junk slots in the bit were packed with clay. 3) Found 90 degree end of allen wrench in the bit. This is part of the allen wrench that was dropped into the BHA & resulted in a failed MWD tool during the surface test. That MWD tool was changed out & sent to Anadrill shop in Deadhorse, disassembled & inspected to find the other part of this allen wrench. Obviously this part of the allen wrench made it through the first MWD tool, the control collar & bias tool. 4) Finish changing pumps to 5 1I2'liners. 5) Losses to hole reduced to 6 bph seepage. Clean rig floor. Install 500 ton short bales & 5 7/8 dp elevators. Attach link tilt & run up into derrick - adjust & rig down same. Note: Seepage losses reduced to 4 bph. Change Top Drive over to handle 57/8 drill pipe with XT57 connection. Notes: 1) Remove the clamps, upper & lower kelly valves for 5 kit. 2) Replace with the 5 7/8 upper & lower kelly valves for 57/8 kit. 3) Reassemble stabbing guide & actuator. 4) Install the 57/8 clamp assemblies. 5) Adjust pipe handler. 6) Seepage losses reduced to -3 bph. Unable to function IBOP - remove & reinstall the actuator. Install bales & elevators. Make up 5 & 5 7/8 floor valves. Pull & inspect Wear Ring & Run Test Plug. Note: Wear Ring was worn worn on one side severely - junked wear ring. Fill Stack & RU for BOPE Test. Note: AOGCC field inspector John Crisp waived witness for test. Test BOP's to 250/4800 psi with 5 & 57/8 test joints. Tested annular preventer to 3500 psi. Set wear ring. RID from testing BOP's. PJSM & level rig. Note: The west side of well row is -16 below grade & requiring shims to level. This was obvious when rig was moved onto location & took additional time to level rig. The flowline measurements have changed today after leveling the rig. Make up BHA #4. Shallow test RSS & MWD - change out control collar due to no signal with real time inclination with MWD. Note: Still no signal from RSS to MWD with real time inclination - could be in the ARC or short hop - decided to go without real time inclination settings from RSS. Make up ADN & load source. Pick up 5 singles from pipeshed. Inspect & torque bolts on top drive stabbing guide plate. Make up ghost reamer 800' behind the bit & dart sub. Pick up 5 singles from pipeshed. RIH with 5 DP to 11,300' MD filling every 30 stands. 8 I I I Time Elapsed (hrs) Time 00:00-02:45 2.75 02:45-03: 15 0.50 03: 15-03:45 0.50 I I I I I 03:45-05:00 1.25 05:00-07:30 2.50 07:30-08:00 0.50 08:00-09:30 1.50 09:30-13:45 4.25 13:45-23:30 9.75 I I I I I 23:30-00:00 0.50 I I 3/18/2004 00:00-00:30 00:30-21 :00 0.50 20.50 I I 21:00-21:30 21:30-00:00 0.50 2.50 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown RIH from 11,300' to 14522' with 5 DP filling every 30 stands. PJSM - change out bales to 500T & elevators to handle 5718 DP. Note: Circulate @ 1 bpm @ 460 psi while change out bales. Reciprocate pipe in between taking 350T bales off & putting 500T bales on. Stage up pumps & record off bottom torque. Compare to off bottom torque when this section was drilled & verify torque modeling accurate to verify maximum surface torque allowable to prevent overtorquing top of 5 drill pipe. Note: 1) At 710 gpm, 2100 psi, 50 RPM, Torque 16K - 21K. 2) At 710 gpm, 2100 psi, 100 RPM, Torque 19K - 21K. 3) At 710 gpm, 2100 psi, 140 RPM, Torque 19K - 22K. 4) We are currently 1-2K lower on off bottom torque compared to when this section was drilled at this particular depth. 5) Lost 38 bbls while circulating for 1 hr. RIH with 57/8 DP from 14522' to 15,177'. Wash down from 15,177' to bottom @ 16018'.285 gpm, 790 psi. Note: Total losses for trip was 120 bbls. Drill ahead in 12 1/4 hole with RSS from 16018' to 16046'. Circulate to condition mud. Drill ahead from 16046' to 16456' md. Note: Current maximum allowable surface torque is 34K ft. lbs. Verifying maximum torque at surface with depth per Perform Engineer & communicating this to driller after confirming with WSL. Replace fluid end on #2 mud pump. Note: 1. Fluid end cracked in housing below cap gasket between suction & discharge chambers. 2. Pumped a sweep & began reciprocating while rotating & circulating hole clean with one pump @ max rate 120 spm (426 gpm). 3. Slowed pumps down to 1 bpm at only 7200 strokes (1/3 surface to surface) after Directional driller warned that 425 gpm was out of the 600-1200 gpm required to turn the RSS & MWD tools on. Stopped rotary & continued to work pipe. Circulating at these sub- operating rates have caused RSS &/or MWD tools to fail prematurely in previous wells for Andadrill. Drill ahead from 16456' to 16525' md. Notes: 1) Current maximum allowable surface torque is 34K ft. lbs. Verifying maximum torque at surface with depth per Perform Engineer & communicating this to driller after confirming with WSL. 2) Lubricant concentration 4.2% with 2.5% lubetex, .6% EP Mudlube, 1.1 % EZ Glide. 3) Losses 5 BPH while change out fluid end & 25 BPH while drilling ahead. 4) Last survey @ 16359' MD - Incl69.93, AZ 308.65 Circulate & condition mud while changing shaker screens. Drill directional in 12 1/4 hole with RSS from 16525' to 18583' MD Notes: 1) Started 11/2 deg drop per 100' @ 18,200' MD - @ 18522' incl63.24 Deg, AZ 308.68 2) Alternating HiVis Barofibre & 3 ppg over MW sweeps every 500'. 3) RSS responding to commands. Service Top Drive Drill directional in 12 1/4 hole with RSS from 18583' to 18915' MD. Note: 1) Last survey @ 18909' MD - incl57.17 deg, AZ 310.30. 9 I I I I I Time (hrs) Elapsed Time 3/19/2004 00:00-03:30 3.50 03:30-06:45 3.25 06:45-10:30 3.75 10:30-11 :30 1.00 11 :30-12:00 0.50 12:00-13:15 1.25 13:15-14:00 0.75 14:00-15:00 1.00 15:00-17:30 2.50 17:30-00:00 6.50 3/20/2004 00:00-02:00 2.00 02:00-05:30 3.50 05:30-08:30 3.00 08:30-10:00 1.50 10:00-21: 15 11.25 I I I I I I I I I I I I I I 21:15-21:45 0.50 21:45-00:00 2.25 3/21/2004 00:00-07:30 7.50 07 :30-12:00 4.50 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown 2) Lubricant concentration Lubetex 1 %, Torque trim 2%, EP Mudlube 1 %, EZ Glide .5%. Drill directional in 12 1/4 hole with RSS from 18915' to 19356'. Note: Last survey @ 19295'- Incl50.43°, AZ 310.98°. Circulate to condition mud. Pump 3 ppg over MW - sweep & circulate surface to surface. Note: Shut down pumps after sweep back to surface to rack 1 stand back in derrick. Resumed circulating - lost 1000 psi pump pressure in 30 minutes - suspected washout. POOH looking for washout to previously chosen wiper trip depth of 16000'. Note: Trip back to 16000' was good with no swab. Dry wiped 4 tight spots one time only & they cleaned up. Tight spots @ 17545', 17430',16965', & 16700' with avg. drag of 55K. 15K to 20K drag after wiping. Continue POOH looking for washout. All 50 stands of 5 7/8 DP out. Change out bales & elevators for 5 DP. Locate washout on the top jt of second stand of 5 pulled. ( Between slip area & tool jt) Stand 149. Change out 5 single & circulate @ 850 gpm 2900 psi. Blow down lines & change out to 500T bales & 5 7/8 elevators. RIH to wiper trip depth @ 16,000'. Continue RIH from 16000' to 19300' filling every 25 stands. Pump 3 ppg over MW weighted sweep & pump surface to surface. Continue circulating & conditioning mud - adding water to lower MW to 9.2 ppg. Continue circulating to condition mud to 9.2 ppg by dilution with water. Note: Production utilizing NS-1O disposal well which delayed dumping mud from rig to G & I. Pits full @ G & I & could not start bleed in of spike fluid before getting rid of additional volume from rig. Increase MW to 10.2 ppg from 9.2 ppg by adding 1000 bbls 12.5 ppg spike fluid treated with black products. Drill directional in 12 1/4 hole with RSS from 19355' to 19534'. Clean suction screens on both mud pumps. Drill directional in 12 1/4 hole with RSS from 19534' to 20033'. Note: 1) Top of Kuparuk @ 19527' MD, 8833' TVD. 2) Kuparuk C faulted out. 3) Kuparuk A @ 19961' MD, 9146' TVD. (A4 sand faulted out & part of A3) Service Top Drive. Notes: 1) Lubricant concentration 3.8% Torque Trim, 1 % EP Mudlube. 2) Last Survey @ 19973', Incl40.22 AZ 307.64. 3) Managing torque by reducing RPM's to 100 -120. (Top Drive continuous torque limited to 41K @ 150 RPM's) Drill directional in 12 1/4 hole with RSS from 20033' to 20107'. Notes: 1) Lubricant concentration 3.8% Torque Trim, 1 % EP Mudlube. 2) Last Survey @ 19973', Incl40.22 AZ 307.64 3) Managing torque by reducing RPM's to 100 -120. (Top Drive continuous torque limited to 41K @ 150 RPM's) Repair fluid end on #2 mud pump. Body in fluid end washed out behind seat. This is fluid end that was replaced just a few days ago. Drill with RSS f/120107' - 20227' md - Geologist picked top of Miluveach @ 20183' md 19320' tvdrkb - 44' of rathole in Miluveach. 10 I I I I I Time (hrs) Elapsed Time 12:00-15:00 3.00 I I I I I I I I I I I I I I 15:00-00:00 9.00 3/22/2004 00:00-01:30 1.50 01:30-02:00 0.50 02:00-09:00 7.00 09:00-09:30 0.50 09:30-13:30 4.00 13:30-14:45 1.25 14:45-15:15 0.50 15:15-16:00 0.75 16:00-17 :00 1.00 17:00-20:00 3.00 20:00-21:00 1.00 21:00-21:30 0.50 21:30-00:00 2.50 3/23/2004 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Notes: 1) Reduced rotation to 130 rpm to compensate high torque of 40K ft lbs. 2) Adding lubricant to maintain concetration @ 4.5% to manage torque & drag. 3) RSS set @ 0% power setting & 0% tool face since 20033 md. 4) Pumped 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep. Wiper Trip to 19067' md - overall good trip. Notes: 1. 10 to 30 klbs overpull from TD to 19931' md (3 stands). 2. 50K overpull on next stand #4. 3. 75K overpull on next stand #5 - wiped with no change. Correlates to ledges in top of Kuparuk. 4. Stands 5, 6 & 7 experience 75K overpull- wiped numerous areas with no change- correlates to ledging in the top of the Kuparuk formation & through the Kalubik. 5. Stands 9 & 10 pulled with 20 to 30 overpull up to the last bit trip. 6. Stands 11 & 12 pulled clean with 10 to 20 overpull. 7. RIH with @ 60' per min to 19400 with 180K SOW. 8. Slackoff weight dropped off to 150 at 60 fpm to 19525' md when stacked up to lOOK SOW (include top drive). Picked up & Slacked off to 90K @ 60 fpm & sat down on same ledge @ 19525' md. PU & increase running speed to 90 fpm or 1.5 fps & slack off decrease to 135K but gained weight back immediately to 180K. Finished trip @ 1.5 fps running speed with slack off weights between 150 & 180K for remainder of trip - final slack off weight. 9. Continured RIH @ 90 fpm (1.5 fps) through ratty section of hole - Recommend that casing running speed be increased to 1.5 fps from 19300' md to TD - PUW 390K & SOW 21OK. Circ & Cond mud while cleaning hole in preparation for casing run. Notes: 1. Pumped 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep. 2. Moderate amount of cuttings with bottoms up. 3. Trip gas @ 3100 units - Gas Cut mud to 9.6 ppg - typical. 4. Sweep at surface brought minimal cuttings to surface. 5. Pumped 2nd 45 bbls low vis followed by 50 bbls 13.4 ppg weighted sweep while circulating the minimum 3 bottoms p for hole cleaning practice for ERD wells - sweep brought minimal cuttings back to surface. 6. Add lubricant to leave good lubricated mud in hole for casing run. Continue circulating 2nd 45 bbllow vis followed by 50 bbl 3 ppg over MW weighted sweep - minimal cuttings back to surface. Monitor well- Note: Losses are 2 BPH while static. POOH from 20227' to 13800' - Trip was good with occasional overpulls to 45K due to cuttings beds between 18500' & 17000'. Spot 150 bbl LCM pill @ 13800'. 10 ppb Steel Seal & 5 ppb barofibre. Continue POOH from 13800' to 4985'. Tight spot @ 4985' - pump & backream from 4985' to 4953'. POOH inside shoe to 4572'. Circulate bottoms up @ 7 bpm, 1100 psi, 80 RPM RIH to 5100' to ensure tight spot cleaned up. POH to 4572' Slip & cut 170' drilling line. Service TD, drawworks, & crown. Static losses 2.5 BPH. Circulate EP mud lube sweep around & discard @ surface. Monitor well, pump dry job & blow down lines. POOH to BHA. SLM on TOH no correction. 11 I I I I I Time Elapsed (hrs) Time 00:00-03:00 3.00 03:00-06:00 3.00 06:00-09:30 3.50 09:30-10:00 0.50 10:00-20:00 10.00 20:00-21 :00 1.00 21:00-00:00 3.00 3/24/2004 00:00-21:00 21.00 21:00-21:30 0.50 21:00-21:30 0.50 21 :30-22:30 1.00 22:30-00:00 1.50 3/2512004 00:00-03:00 3.00 I I I I I I I I I I I I I I 03:00-07:30 4.50 07:30-10:00 2.50 10:00-10:30 0.50 10:30-11:30 1.00 11:30-13:00 1.50 13:00-15:00 2.00 15:00-16:30 1.50 16:30-17:00 0.50 17:00-18:00 1.00 18:00-00:00 6.00 3/26/2004 00:00-01:00 1.00 01:00-03:00 2.00 03:00-08:00 5.00 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Lay down BHA # 4 - bit in good shape graded 0-0. Pull bowl protector, install test plug, change out upper rams to 9 5/8" & test door seals. Lay down testing equip't. Rig up 9 5/8" casing handling tools. PJSM on 9 5/8" casing run. Runjts 1 - 112 of 95/8" 47# L-80 Mod Butt. to 13 3/8" shoe @ 4,621 ft with 3 BPH losses. Circulate @ shoe staging up pump from 1 to 10 bpm & circulate bottoms up. At 10 bpm, 420 psi. Pick up weight 21OK, Slack off weight 185K. Runjts 113 to 153 of9 5/8" 47# L-80 Mod Butt with 3 BPH losses. Getting Pick up weights every 10 jts. Perform Engineer tracking Pick up & Slack off wts for entire casing run. Can't RIB with 9 5/8",47#, BTC-M, L 80 casing to 20,164 ft. Controlled running speed through out entire run. Lost returns @ 19,360 ft. Slack off weights slightly below model. Make up mandrel hanger. Land casing with 170k hook load on the hanger. Float shoe @ 20,207 ft. Flow check @ 20,125 ft. Rig down fill up tool. Make up cement head & surface circulate lines. Circulate casing staging pumps up to 1.5 bpm @ 1130 psi. Continue staging up pump & circulate prior to cement job - 0.5 to 3.0 bpm. Notes: 1) Lost 285 bbls while pumping 360 bbls - avg 20% returns. 2) Lost complete returns @ 3 bpm before backing off to 1 bpm & regaining returns. 3) Had losses throughout circulation starting @ 0.5 bpm. 4) Held PJSM for cement job. Pump 5 bbls sea water & test lines to 3500 psi. Pump 50 bbls 11.2 ppg weighted spacer & drop bottom plug. Pump 838 bbls (1452 sx) 11.2 ppg Class G lead slurry followed by 143 (700 sx) 15.9 ppg Class G tail cement. Drop top plug & wash up with 25 bbls sea water from HOWCO on top of plug. Swap to rig pump for displacement. Lost 900 bbls while pumping 1056 bbls spacer, cement & sea water. Avg 12% returns. Displace cement with 10.3 ppg mud @ 10 bpm. Lost 730 bbls while displacing with 1448 bbls- A vg 51 % returns. Pumped 94% PE + 1/2 shoe track & did not bump plug. Bled off pressure & check floats - floats holding. Ending pump pressure @ 5 bpm 2250 psi. Rig down landing jt & cement head. Install packoff & test to 5000 psi. Change out sweeps, remove casing handling equip't from floor & rig down pack-off running tools. Rig up kill line to pump down 13 3/8" X 9 5/8" ann. Test lines to 2500 psi. Pump down annulus with 10.3 ppg @ 1 bpm until pressure broke over @ 450 psi. Increase rate to 4 bpm for a total of 275 bbls. FCP - 270 psi. Change out top rams to 4 1/2" X 7" variables & rig up kill line to stack. Rig down 500T bales & install iron roughneck track. Rig up test equip't, set test plug & fill stack. Test BOP's per BP / AOGCC regs. 250 psi low / 4800 psi high. Test annular preventer 250 low /3500 high. Test BOP's with 5" & 57/8" testjts & tested 5" & 57/8" floor valves. Rig down & blow down BOP test equip't. Change out dies on top drive back up wrench. Install bales & elevators. Make up BHA & surface test equip't. Note: Bias unit did not test, therefore lay down & found rag in control collar. Removed rag & retested on surface - okay. 12 I I I I I Time Elapsed (hrs) Time 08:00-09:00 1.00 09:00-16:00 7.00 16:00-18:30 2.50 18:30-20:00 1.50 20:00-22:30 2.50 22:30-00:00 1.50 3/27/2004 00:00-01:00 1.00 01:00-04:30 3.50 04:30-05:00 0.50 05:00-06:00 1.00 06:00-06:30 0.50 06:30-09:30 3.00 09:30-10:00 0.50 10:00-10:30 0.50 10:30-13:00 2.50 13:00-13:30 0.50 13:30-14:00 0.50 14:00-21 :30 7.50 21:30-22:00 0.50 22:00-00:00 2.00 3/28/2004 00:00-13:30 13.50 I I I I I I I I I I I I I I 13:30-14:30 14:30-18:00 18:00-18:30 18:30-00:00 1.00 3.50 0.50 5.50 3/2912004 00:00-09:00 9.00 09:00-12:30 12:30-15:00 3.50 2.50 15:00-16:00 1.00 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Load source in ADN. Freeze protect 13 3/8" x 9 5/8" annulus with 125 bbls diesel out of critical path. RIH w/5" DP. Pick up 48 singles from pipe shed & RIH. Change out bales & elevators to 5 7/8". Cut & slip drilling line. Service top drive, draw works & crown. RIH with 5" DP. Continue RIH to 19435'. Wash down from 19435' to FC @ 20125' 70 SPM, 1200 psi. Tag cement stringers @ 20011' & tagged plugs @ 20065'. Circulate in preparation for casing test. Rig up to & test casing to 4000 psi with 10.3 ppg & hold for 30 min. Drill plugs & float collar on depth @ 20125'. Add spike fluid & wt up to 12.5 MW while drilling shoe track. Drill shoe & 20' new hole to 20247'. Conduct FIT to 15.0 EMW wI 12.5 mud. 1190 psi surface pressure. Drill 8 1/2" hole from 20247' to 20262'. Change out pop off on #1 mud pump. Increase flow rate to 550 gpm, open Rhino reamer. Check that blades opened. Drill 8 112" hole opened up to 9 1/2" with Rhino reamer from 20262' - 20505'. Service top drive. Drill 8 1/2" hole opened up to 9 1/2" with Rhino reamer from 20505' to 20565'. Drill 8 1/2" hole opened up to 9 1/2" with Rhino reamer from 20565' to 21120'. Notes: 1) Top of Kingak @ 20760'MD, 9802' TVD. 2) RSS responding to down links. 3) Anadrillog shows Rhino reamer opening hole to 9 1/2". 4) 4% GEM in mud system for shale inhibition & stabilization. 5) 5.75% lubricants in mud - 1.25% EP mud lube, 4.5% torque trim. 6) Control drill to 60' per hr. Change out cap gasket on #1 mud pump. Drill 8 1/2" hole opened up to 9 1/2" with Rhino reamer from 21203' to 21375'. Service top drive. Drill 8 1/2" hole opened up to 9 1/2" with Rhino reamer from 21375' to 21599'. Note: 1) Last survey @ 21578', InclI7.30° AZ 307.85°. 2) Up wt. 330K, Dn wt. 195K, Rot wt. 245K. Drill ahead in 8 1/2" hole opened up to 9 1/2" hole wI Rhino reamer to TD @ 21985' MD. Notes: 1) Pumped weighted Barofibre sweep @ 21750' wI 25% increase in cuttings on bottoms up. 2) Incurred losses while drilling last 11' of Sag. (240 bbls). Circulate LCM pill for losses in Sag. POOH from 21985' to 20020'. Pulled wet & did not pump out. Trip out was excellent. No overpull & no swabbing. Circulate @ shoe to condition mud & check for losses. No losses while pumping @ 8.5 bpm but when increased to 9 bpm incurred 50 bph losses. 13 I I I I I Time Elapsed (hrs) Time 16:00-16:30 0.50 16:30-18:30 2.00 18:30-23:00 4.50 23:00-00:00 1.00 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Blow down lines & monitor well. Well static RIH - trip was excellent - took 40k drag @ 21,140' wiped once & it cleared up - no fill @ TD. Pump HiVis Barofibre sweep 1 stand off bottom @ 350 gpm, 2100 psi, RPM 110. Losses of 15 bph increased to 100 bph - back off rotary to 30 RPM, 5 bpm. Losses still @ 100 bph. Spot LCM pill @ TD (Barofibre & Steel Seal). 3/30/2004 00:00-01:00 1.00 Spot LCM pill at 21,985' MD. 01:00-03:00 2.00 POOH 7 stands, above the pill. Pump out to the shoe at 20,227' MD. 03:00-03:30 0.50 Monitor well at shoe. 03:30-20:30 17.00 Pump dry job. Blow down mud lines. POOH & lay down 48 joints of 5" DP. Con't POOH racking 5" & 57/8" DP in derrick 20:30-21:30 1.00 POOH to 510' MD, 20k lbs over pull. RIH tag lOk down to confirm. POOH to 300' MD. RIH to 474' MD, stack up 15k - suspect casing backed off at 474' MD (bit hang up). Suspect reamer hung up at 510' MD on TOOH. 21:30-00:00 2.50 POOH. Lay downBHA #5. I I I I 3/31/2004 00:00-01:00 1.00 01:00-03:00 2.00 03:00-06:00 3.00 06:00-08:00 2.00 08:00-08:30 0.50 08:30-10:00 1.50 10:00-10: 30 0.50 10:30-11:30 1.00 11:30-12:00 0.50 12:00-12:30 0.50 12:30-13:00 0.50 13:00-16:30 3.50 16:30-17:30 1.00 17:30-18:30 1.00 18:30-20:00 1.50 20:00-21 :00 1.00 21:00-21:30 0.50 21:30-22:30 1.00 22:30-23:00 0.50 23:00-00:00 1.00 4/01/2004 00:00-01:30 1.50 01:30-02:30 1.00 01 :30-02:30 1.00 02:30-05:00 2.50 05:00-06:30 1.50 06:30-07:00 0.50 07:00-07:30 0.50 I I I I I I I I I I Lay down BHA. Rig up & RIH with Retrievable Bridge Plug (RBP). Set at 1,521' MD. Dump sand into drillpipe & pump down hole to protect fish neck. Circulate 9.0 ppg into well to displace diesel. POOH. Pull wear ring & packoff. Rig up to pull 9-5/8" casing. PJSM on pulIng 9-5/8" casing. Pull 406.90' (10 jts) 9-5/8" casing. Last jt had collar on it with pin looking up in hole. Casing pulled with no overpull. Rig down 9-5/8" casing. Fisrt 2 connections broke @ 7k & 8k ftlbs. All others between lOk- 15k ftlbs of torque. Clear rig foor. Pick up 5" equipment. Test kill line. Blow down all mud lines. Make up back off tool. RIH to 505' with 5" DP, DC's, BOT, & HWDP. Fill every stand with seawater. Change out to long bales. Set dogs with 1500 psi & 3000 psi pressure increase (top at 505' MD; bottom at 531' MD). Attempt to back out with various pressures & trouble shooting. Blow down all mud lines. Change out to short bales to POOH. POOH with back off tool. Lay down back off tool. Some broken dogs, re-runnable. Make up 10 3/4" stop ring to tag top of fish. RIH with stop ring. Tag top of fish at 455' MD. POOH with stop ring. Lay down same. RIH to backout 9-5/8" casing. Spaceout & back out casing. Set top dogs at 480' MD; Bottom dogs at 506' MD. Joint backed out with 1200 psi. Obtained 114 to 118 revolutions each cycle - 4 total turns. POOH & lay down BHA. Pick up spear/grapple assembly & RIH. POOH. Pick up a mule shoe. Grapple did not engage, suspect may not be entering casing. RIH to contniue backing out fish. 14 I I I Time Elapsed (hrs) Time 07:30-09:00 1.50 09:00-09:30 0.50 09:30-10:30 1.00 10:30-12:00 1.50 12:00-13:00 1.00 13 :00-14:00 1.00 14:00-16:30 2.50 16:30-18:00 1.50 18:00-18:30 0.50 18:30-19:00 0.50 19:00-20:00 1.00 20:00-21:30 1.50 21:30-23:00 1.50 23:00-23:30 0.50 23:30-00:00 0.50 4/02/2004 00:00-01:00 1.00 01:00-02:00 1.00 02:00-06:30 4.50 06:30-08:00 1.50 08 :00-1 0:00 2.00 I I I I I I I I I 10:00-12:30 2.50 I 12:30-13:00 0.50 I 13:00-15:00 2.00 I 15:00-16:30 1.50 I 16:30-19:00 2.50 I 19:00-20:30 1.50 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Attempt to engage fish. Did not appear to engage. Begin to POOH, spear immediately caught fish & released. Stop job, inspect equipment & repair as required. Continue to POOH. Grapple not LIH. Redress fishing equipment with grapple I spear & RIH. Engage fish. Back out with 7 turns. POOH. Lay down spear & casing. Half of the initial spear found in casing joint, rest is left in hole. Casing joint in good condition. No damage to threads. Clear rig floor. PJSM - rig up to run casing. RBI with 9-5/8" 47# BTCM casing -12 joints total, with one 5' pup (buried). Sting into casing stub. Work torque down. Took over 75 revolutions to work torque into pipe. Anticipated 11 revs. Test casing to 3000 psi for 10 minutes. Blow down all mud lines & top drive. Pump out casing using G&I to drop fluid level for spill prevention during casing cut. PJSM. Nipple down BOPE. PJSM. Pull 350k actual on casing (420k on weight indicator). Casing took 4.5' of stretch. Set emergency slips. Rough cut casing. Lay down same. Cut casing stub 9.33' long. Nipple down riser. Move BOPE out of the way for final cut. Set back BOP. Perform final cut on casing. Set packoff. Test to 5000 psi. Nipple up BOP and body test to 4800 psi. Pick up fishing BHA, 8.5" reverse circulating basket. RIB to 1500' MD. Wash down to RBP at 1521' MD. No indication of junk. POOH. ** No junk in basket. ** No markings of junk. RIB with same BHA. ** Wash and work over fishing neck ofRBP. ** Spud on fish, showing reactive torque. ** Mill on junk I top ofRBP. ** Reactive torque subsiding. Flow check well. - Blow down lines. POOH with reverse circ sub. ** Fingers missing. ** Burn shoe 100% worn. ** All indications that large junk pieces are broken up. RIH with reverse circ sub (w/o finger basket) and junk basket. - Tag fish on depth, no fill. - Circulate 30 bbls to fill junk basket. Allow fluid to settle. - Circulate a hi-vis weighted sweep at 600 gpm. Allow fluid to settle. POOH. ** Minimal junk in basket, to include one horseshoe shaped brass piece. Photo sent to Anchorage ODE. RIH with junk basket and packer retrieving tool. ** PU 95k. Upper limit for tool sheer is 117k over PU. ** Pump at 50 spm/25 psi. ** Tag fish. 15 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) I Time Elapsed Operations Breakdown (hrs) Time I ** Pump at 90 spm 1125 psi. Pumps off. ** Set weight down to 80k. ** Pump at 90 spm 1410 psi. Swallowed neck on RBP. ** SO to 65k, turn 1/2 rev. PU lOOk. No Latch. I ** Repeat. Latched fish. Fluid dropped 7 bbls. Well on a vacuum. ** Some difficulty getting free; however, worked free with pump and repeated attempts. ** Once free, shut pumps off and monitor well. I 20:30-00:00 3.50 POOH with RBP. ** POOH with hole fill. Trend sheet accurate. ** Fish catching every 40 feet, suspect junk hanging up on casing I connections. ** Circulate bottoms up at 90 spm. ** Fish continuing to catch, pump 2 stands out. ** Decision to stop pumping (not providing any reliet). I ** Fish coming easy, no catching from 1267' to 579'MD. ** At 579', overpull to 200k. Work repeatedly. Begin pumping, fish released with 84 spm / 44 psi. I ** Continue to POOH without incident. ** Two pieces of grapple retrieved as well as fingers from the reverse circulating basket. Photos sent to Anchorage ODE. ** Drained possum belly and found metal shavings but no large junk. I 4/03/2004 00:00-01:00 1.00 Lay down RBP and BHA. I 01:00-01:30 0.50 Clear rig floor. 01:30-02:00 0.50 Change out saver sub on TD to 5-7/8". - Torque to 52k ftlbs. - Adjust grabber. I 02:00-03:00 1.00 PJSM - Pull wear ring. - Install test plug. I 03:00-04:30 1.50 Change out upper rams to 2-7/8" x 5" 04:30-05:00 0.50 PJSM. - Rig up to test BOPE. 05:00-13:30 8.50 Test BOPE with 4",5",5-7/8" test joints to BP & AOGCC regs. 250 psi I low / 4800 psi high 13:30-14:00 0.50 Blow down top drive and all mud lines. 14:00-16:00 2.00 Slip and cut drilling line. I 16:00-17:00 1.00 Service top drive, crown, and drawworks. 17:00-18:30 1.50 Trouble shoot RPM and brakes on TD. - PJSM - Remove brake disc. I 18:30-00:00 5.50 PJSM - Remove wash pipe. ** Wash pipe not coming free. Removed gooseneck for access. I 4/04/2004 00:00-02:30 2.50 Continue to change out wash pipe on top drive. 02:30-05:30 3.00 Pull test plug. I Install wear ring. **Daylight savings of 1 hour. I 16 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) I Time Elapsed Operations Breakdown (hrs) Time 05:30-07:00 1.50 Pick up BHA #17, cleanout BHA. I 07:00-08:00 1.00 Test MWD. Test wash pipe to 4500 psi. Blow down lines. I 08:00-12:00 4.00 RIH to 5,479'MD Notes: - RIH at 60 fpm. - Strap in the hole. I - Fill pipe every 30 stands. - Hole took approximately 3 bbls. 12:00-13:30 1.50 Circulate and condition mud one bottoms up at 5,479' MD. I 13:30-17:00 3.50 RIH at 10,205' MD Notes: - RIH at 60 fpm. - Strap in the hole. I - Fill pipe every 30 stands. - Hole took approximately 8 bbls. 17:00-18:30 1.50 Circulate and condition mud one bottoms up at 10,205'MD. I 18:30-22:00 3.50 RIH at 14,638' MD Notes: - RIH at 45 fpm. - Strap in the hole. I - Fill pipe every 30 stands. - Hole took approximately 16 bbls. 22:00-23:30 1.50 PJSM. I Install brake hub. 23:30-00:00 0.50 Circulate and condition mud one bottoms up at 14,638'MD. 4/05/2004 I 00:00-01:00 1.00 Continue to circulate and condition mud one bottoms up at 14,638'MD. 01 :00-03:30 2.50 RIH picking up 5" singles from the pipe shed. Notes: I - RIH at 45 fpm. - Strap in the hole. - Picked up 48 singles. 03:30-04:30 1.00 Change out to 5-7/8" handling equipment I 04:30-08:30 4.00 RIH to 20,070'MD with 5-7/8" DP Notes: - RIH at 45 fpm. I - Strap in the hole. SLM no correction. - Fill pipe every 30 stands. - No indications of losses. - Shoe at 20,150'MD I 08:30-15:00 6.50 Circulate and condition mud. Notes: - Mud coming back from 11.9 ppg - 14.2 ppg. Circulate until MWin = I MWout. - Circ 350 - 550 GPM. Max ECD 14.3 ppg. 120 RPM's - Replace TD brake and RPM indicator while circulating. 15:00-17:00 2.00 Run into open hole to 21,945' MD (12' into Sag). I Notes: - RIH @ 45 fpm I 17 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) I Time Elapsed Operations Breakdown (hrs) Time - No tight hole. I - No losses. - No indication of fill. - Took 20k drag @ 20,825' MD. Worked through with no problems. I 17:00-19:30 2.50 Pull out of open hole to 20,070' MD (80' into casing). Notes: - POR @ 45 fpm - Pumping out was NOT required. I - Rotation was not required. 17:00-19:30 2.50 Pickup weights below predicted as per PERFORM engineer. - Overpulls occurred beginning at 20,850' MD until 20,300' MD. I - Most significant overpulls were between 20,850 - 20,500, which correlates to the BRA being pulled through a 2+ degree dog leg. Once the BRA cleared the dog leg, minimal overpull was observed. 19:30-20:30 1.00 Monitor well 10 minutes. I - Pump dry job. - Blow down mud lines. - Drop hollow rabbit on joint #208. I 20:30-23:30 3.00 Continue to POOR from 20,070'MD to 16,008'MD. - POR @ 45 fpm 23:30-00:00 0.50 PJSM - Change equipment from 5-7/8" handling equipment to 5". I 4/06/2004 00:00-01:00 1.00 PJSM I - Change equipment from 5-7/8" handling equipment to 5". 01:00-02:30 1.50 PJSM - Lay down 48 joints of 5" DP into the pipe shed. 02:30-11 :30 9.00 POOR with 5" DP. I 11:30-13:00 1.50 Monitor well. - Lay down HWDP and BRA #17. - Freeze protect 9-5/8" x 13-3/8" annulus with 125 bbls of heated diesel. I 13:00-14:00 1.00 Clear rig floor. 14:00-14:30 0.50 Inspect and service wear ring. 14:30-15:00 0.50 Rig up casing running equipment. 15:00-21:00 6.00 RIH with 7" 26# L-80 Rydril521 liner @ controlled running speeds. I Notes: - 49 joints - 3 joint shoe track I - ZXP packer, HRD liner rotating assembly, double grip hanger, and debris screen. 21:00-21:30 0.50 Rig down liner running equipment. - Pump 1 liner volume at 4.5 bpm I 250 psi. 21:30-00:00 2.50 RIR with 7" liner on 5" DP to 3900' MD @ controlled runing speeds. I Notes: - No bobble at 497' or 3400' MD. Fill pipe every 10 stands. I 4/07/2004 4/08/2004 I 00:00-02:30 2.50 Washed and Reamed through tight spot from 21650' - 21665'md. Notes: I 18 05:00-07:45 2.75 07:45-08:00 0.25 08:00-08:45 0.75 08 :45-1 0:00 1.25 10:00-10:30 0.50 I I I Time (hrs) I I I I I 02:30-03:00 I 03:00-04:00 04:00-04:45 04:45-05:00 I I I I I I 10:30-13:30 I 13:30-14:30 14:30-16:00 16:00-17:00 17:00-21:30 21 :30-22:30 22:30-00:00 I 4/09/2004 I Elapsed Time 0.50 1.00 0.75 0.25 3.00 1.00 1.50 1.00 4.50 1.00 1.50 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown 1. Stacked up at 21650' md after taking 50K weight from 170K SOW to 120K stack up weight. -Occurred immediately after making connection. - Unable to pick up to free point -- stand back stand and PU single from pipe shed. - PU to free point with 350K. 2. 3 addtional slack off attempts while determining tight spot and not a ledge -- this is the pressure transition at base of Kingak shale. - Slack off to lOOK and pull free with 375K (25K overpull). - Slack off to 80K and pull free with 400K (50K overpull). - Slack off to 80K and pull free with 405K (55K overpull). 3. Establish circulation -- 1/2 bpm with 1200 psi. Gradually increase rate to 2 bpm with 1075 psi. 4. Establish rotation @ 24 rpm with 22K ft. Ibs. torque. Established circulation @ 2 bpm and rotation @ 24 rpm with 22K ft. Ibs torque. Slacked off 4x in attempt to work through tight spot @ 21650'md in attempts to determine if stacking up on ledge or encountering tight hole. Ream from 21610' - 21680'md. Notes: 1. Experienced reactive 6 to 7K ft. Ibs reactive torque from 21650 to 21655'md. 2. Torque smoothed out thereafter indicating good hole. Wash fl 21680' - 21930' md -- precautionary ream with no hole problems experienced. Make up single, 10' pup and rotating cementing head -- rig up extra 25' of cementing hose. Wash fl 21930' - 21945' md -- 12 feet below the top of Sag River formation @ 21933' md. Notes: Stacked up with 10K, 20K, 30K, 40K and 50K in attempt to wash down in rathole. No signs of pressure increase, losses or packing off while each successive PU required additional overpull to free pipe -- directional dríller suggested this was the depth that Rhino reamer had enlarged the hole. Coincidently, this is also the depth the c1eanout run was stopped at -- attempt was not make to go below this point with the 8-1/2" c1eanout run. Gradually increase circulation rate to 6 bpm in preparation for cementing the 7" liner. Line up Hal1íburton, pump 5 bbls of Alpha Spacer and Pressure test cement lines to 4500 psi. Pump 125 bbls (456 sxs) of Premium G Cement with Additives as described in cementing report. Displace wiper dart, latch and bump plug with 4200 psi to set hanger and release running tool. Note: Bumped plug with 5281strokes @ 99.5%. Set Hanger, Check Floats and Set Packer -- 7" shoe set @ 21945' md (12' below top of Sag) and Top ofT' liner is @ 19949'md. Note: Packer set with lOOK down weight -- pins sheared at 140K slack off with 60K down weight. Establish rotation @ 16 rpm and slacked off 80K to ensure packer was set. Release liner running tool and circulate approximately 25 bbls of cement to surface with 12 bpm (140 spm and 250 fpm A V with 5' inside 9-5/8" casing). Lay down rotating liner cementing head in pipe shed -- BID all lines. Slip and Cut drílling line. Service Top Drive, Crown and Drawworks. POOH with 5-7/8" dríll pipe. Change over to 5" dp handling equipment. POOH with 5" dríll pipe to 12100' md. I 19 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) I Time Elapsed Operations Breakdown (hrs) Time 00:00-04:30 4.50 Finish POOH with liner running tool on 5" dp. I 04:30-05:00 0.50 Inspect and lay down liner running tool. Note: Dog Sub Shear and no sign of damage to running tool. Tool was caked with thick heavy wall cake and formation. I 05:00-06:00 1.00 PU rotating liner cement head from pipe shed and make service breaks. Lay Down in pipe shed. 06:00-06:45 0.75 Clean Rig Floor while preparing equipment for BOPE Test. 06:45-07:30 0.75 PJSM for BOPE Test -- Pull Wear Ring and run Test Plug. I Notes: 1. Wear Ring shows 1/2" to 3/4" grooves from pipe wear as tool joints run through it due to misalignment of the wellhead. I 2. Not a show stopper; however will need to address rig alignment over hole prior to running completion. 07:30-16:00 8.50 Test BOPE -- 5-7/8", 5" and 4" dp sizes. Note: AOGCC field inspector Jeff Jones waived witness @ 3 pm on 4/8/04. I 16:00-16:30 0.50 Pull Test Plug and install Wear Ring. 16:30-18:00 1.50 Close blinds and test 9-5/8" casing and 7" liner to 3000 psi for 30 minutes. 18:00-20:30 2.50 MU 6-1/2" BHA #18 as per DD -- Load Neutron Source and C/O elevators. I 20:30-21:00 0.50 Shallow test the MWDILWD with water from pipe rack. 21:00-00:00 3.00 RIH while PU 6 joints of 4" hwdp and 69 joints of 4" dp. 4/10/2004 I 00:00-05 :45 5.75 RiH with 5" dp (fill every 30 stds). 05:45-07:30 1.75 Change over to 500 ton handling equipment for 5-7/8" dp. 07:30-12:00 4.50 RiH with 5-7/8" drill pipe to 21532'md. I 12:00-13:00 1.00 Wash f/ 21532' - 21819' and tag LC -- no cement. 13:00-16:00 3.00 Circulate heavy weight mud (16 ppg at one point) while drilling the LC, FC and shoe track to FS. 16:00-23:00 7.00 Displace well to 9.1 BARADRILn drilling fluid. I Notes (Displacement went very well): 1. Pumped @ 280 gpm -- limit for motor as per DD. 2. Rotated at 70 rpm with 30k ft.-lbs. torque -- no excessive shocks I measured at Anadrill components. 3. Reciprocated pipe full strokes through out displacement. 4. Pumped 100 bbl Hi-Vis Sweep + 75 bbl sea water sweep + 50 bbl Hi- Vis Sweep. I 5. Interface was very minimal-- actually weighed 8.6 ppg fluid with sweep back to surface -- 9.1 ppg to surface on calculated strokes so no channeling observed. 23:00-00:00 1.00 Drill shoe @ 21942'md. I 4/11/2004 00:00-03:00 3.00 Drill 7" liner float shoe and slide through rathole to 21985'md while I pumping 6.5 bpm and attempting to sidetrack past possible grapple junk left in hole from 9-5/8" casing repair work. 03:00-04:00 1.00 Attempts to drill past 21985' md (TD of 8-1/2" rathole) failed. Notes: I 1. Tagging up on junk and stalling motor. 2. Attempted to slide with no advance, PU and establish ROW, slack off and apply lOK WOB in 2K increments until motor stalled - repeat process x2. I 3. Decision to POOH for fishing assembly. 04:00-05 :00 1.00 Condition Mud and Circulate while mixing dry job -- shut down and I 20 I I I I I Time (hrs) Elapsed Time 05:00-08:45 08:45-09:30 09:30-10:45 10:45-12:00 12:00-12:30 12:30-18:00 18:00-20:30 20:30-23:30 3.75 0.75 1.25 1.25 0.50 0.50 2.50 3.00 I I I I 23:30-00:00 0.50 4/12/2004 00:00-00:30 0.50 00:30-02: 15 1.75 02: 15-03:00 0.75 03:00-04:30 1.50 04:30-10:00 5.50 10:00-10:45 0.75 10:45-15:00 4.25 15:00-16:30 1.50 16:30-17:30 1.00 17:30-18:30 1.00 18:30-19:00 0.50 19:00-19:30 0.50 19:30-22:30 3.00 22:30-23:00 0.50 23:00-00:00 1.00 4/13/2004 00:00-00:30 0.50 00:30-01:30 1.00 01 :30-03:00 1.50 03:00-04:00 1.00 04:00-08:00 4.00 08:00-09:00 1.00 09:00-11:00 2.00 11:00-13:00 2.00 13:00-13:30 0.50 13:30-15:00 1.50 15:00-16:00 1.00 I I I I I I I I I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown monitor well for 15 minutes -- static. Pump dry job and BID lines. POOR to 16814'md -- dry job didn't take. PJSM -- Change out handling equipment fI 5-7/8" to 5". Slip and Cut drilling line. Service Top Drive, Crown and Drawworks. Pump second dry job and blow down lines. Continue POOR to 4" dp at 2566'md. Change out to 4" elevators, monitor well and LD 57 joints of 4" drill pipe. Flush BRA with fresh water, change out to 3-1/2" elvators and LD BRA #18. Notes: 1. Cleared Rig Floor and polled neuclear source from ADN. 2. Bit showed signs of junk damage with 1 chipped insert and junk gouges on cones. Directional Driller sent pictures of bit to town. Clean Rig Floor. Finish Clearing Rig Floor. MU BRA#19 -- Reverse Circ Globe Basket to fish grapple junk. Repair leak on low drum clutch. RiR while PU 4" drill pipe from pipe shed. RiR with 5" dp to fI 2206' - 16431 'md. Change over to 5-7/8" handling equipment. Continue RiR with 5-7/8" dp and tag junk @ 21985'md. Note: Original TD of 8-1/2" hole prior to RiH with 7" liner. Drop 7/8" ball to initiate reverse circulation @ globe basket. Engage fish with rotation and circulation (rev circ @ globe basket). Notes: Pump 350 gpm with 2550 psi while rotating 50 rpm with 20 to 25K ft-lbs torque (0-5K reactive torque) and applying 0 to lOK WOB intermittently. Circ and Cond mud while changing screens to address soaping of screens as surface due to blinding affects of minor signs of saphonification. Engage fish with parameters outlined above. Reactive torque dropped off, made approximately one foot of hole, no reactive torque and unable to make any more hole. Pump pressure is still 2550 psi with 350 gpm. Monitor well, pump dry job and blow down all lines. POORfl21,989'-17591'md. Pump 2nd dry job. POOR fl17591' - 171OTmd. POR w/5 7/8" DP (wet) CIO bales & elevators to 5" Cut & slip drilling line. Adjust brakes Lubricate rig, service TD, crown, & drawworks. POR (wet) w/5" DP Condition mud & circulate. Pump dry job & BID lines POR w/5" DP (dry) Monitor well @ 4" DP. POR wI 4" DP LID singles C/O to 3 1/2" handling equip't Monitor well @ BRA. Randle BRA Note: Recovered 3.51bs. of junk inside globe basket. Service TD & drawworks. 21 I I BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) I Time Elapsed Operations Breakdown (hrs) Time 16:00-16:30 0.50 M/U BRA # 20 after discussing plan forward wi Anchorage. Decision I made to run concave mill wi 2 boot baskets. 16:30-18:00 1.50 cia to 4" handling equip't & PIU 4" singles & RIH. 18:00-00:00 6.00 cIa to 5" handling equip't & RIH w/5" DP. I 4/14/2004 00:00-00:45 0.75 cIa bales & elevators to 57/8" handling equip't. 00:45-03:00 2.25 RIR wi 57/8" DP to 21843'. I 03:00-03:30 0.50 Wash down from 21843' & tag bottom @ 21986' wi 4 BPM, 660 psi. 03:30-05:30 2.00 Mill from 21986'to 21994' wi varying pump rates & rotary speeds. Work pipe back to shoe in attempts to work any junk down to bottom. No I indication of milling on any junk. Notes: - Avg. torque on bottom 19-20K - Pump rates varied from 168 - 320 gpm. I - PIU wt 340K, SIO wt 225K, Rt wt 280K 05:30-06:15 0.75 Continue circulating & conditioning mud. Note: I - Max gas units of 690 on BIU. - Mud weight @ bu reached as high a 9.7 ppg. - Circ until MWout = 9.2 ppg. 06:15-07:15 1.00 paR above shoe & rack back 1 stand DP. I Drop ball & rod to open circ sub & pump down @ 5 BPM, 850 psi. 07:15-08:00 0.75 Monitor well - pump dry job - BID lines. 08:00-11 :00 3.00 paR w/5 7/8" DP. I 11 :00-12:00 1.00 cia to 5" handling equip't. 12:00-15:30 3.50 paR wi 5" DP. 15:30-16:00 0.50 Lost solar engines at Production module due to false gas alarm. Start rig engines & convert to rig power. I 16:00-18:00 2.00 Continue paR wI 5" DP. Note: Test choke manifold while paR -- out of critical path. I 18:00-19:30 1.50 cia to 4" handling equip't & LID 4" singles. 19:30-21 :30 2.00 cia to 3 1/2" handling equip't & LID BRA #20. Note: - Mill in gage wi no signs of encountering any significant junk. I - No junk marks on any of the tools. - Recovered 5 ozs. of additional small metal fragments in boot baskets. - Most pieces are smaller than a dime with 1 piece a little larger than a I quarter. Assorted pieces of formation recovered in boot baskets. - Total of 4lbs. recovered 13.5# missing. 21 :30-22:00 0.50 Clear & clean rig floor. 22:00-22:30 0.50 R/U & pull bowl protector. I 22:30-00:00 1.50 PJSM - R/U & test BOP's per BP & AOGCC Regs. 04/15/04 00:00-06:00 6.00 Test BOPE per BP & AOGCC Regs to 250 I 4800 psi wi 4" 5" & 57/8" I test jts. 06:00-06:30 0.50 Pull test plug & install bowl protector. 06:30-07:00 0.50 BID choke & kill lines & clear floor. I 07:00-08:30 1.50 Slip & cut drilling line. Adjust brakes. 08:30-11:00 2.50 M/U BRA #21 I 22 I I I I I Time Elapsed (hrs) Time 11:00-11:30 0.50 11:30-13:30 2.00 13:30-20:00 6.50 20:00-21:00 1.00 21 :00-00:00 3.00 04/16/04 00:00-03:45 3.75 03 :45-13 :00 9.25 13:00-15:30 2.50 15:30-16:00 0.50 16:00-16:30 0.50 16:30-17:00 0.50 17:00-18:00 1.00 18:00-18:30 0.50 18:30-19:00 0.50 19:00-20:00 1.00 20:00-21 :00 1.00 21 :00-00:00 3.00 I I I I I I I I I I I I I I 04/17/04 00:00-01:00 1.00 01:00-01:30 0.50 01:30-02:00 0.50 02:00-08:00 6.00 08:00-08:30 0.50 08:30-09:00 0.50 09:00-09:30 0.50 09:30-11 :30 2.00 11:30-12:30 1.00 12:30-00:00 11.50 BP Exploration - Northstar NS21 Daily Operations (I.A.D.C) Operations Breakdown Shallow test MWD & BID lines P/U 4" DP singles from pipeshed & RIH. cia to 5" handling equip't & RIR to 16787' filling every 30 stands. cia to 57/8" handling equip't. Continue RIH wi 57/8" DP to 7" shoe @ 21945' filling every 30 stands. Orient tool face and Slide fl 21994' -- 22015'md. Circ and Cond Mud. Perform FIT to 11.5 ppg EMW. Blow down kill line. Drill fl 21994' - 22261' md. Verified TD with Anch Geologist @ 11206' tvdrkb (50 feet below the OWe). Mad Pass f/ 22261' - 21942' md. Pull bit into 7" liner shoe. RIH to 22261' md -- no hole problems. Fill DP and circulate 85 bbls -- 1.5x annular capacity to top of 7" liner. Well Static. Trip bit to inside 7" liner shoe @ 21945'md -- no hole problems (hole fill correct). Blow down top drive and lines. Continue paR to 21242' md (hole fill not correct -- last 5 stands should have taken 4.7 bbls and took 2.0 bbls instead). Discovered equalizer valve leaking between trip tanks. Pump out trip tanks. Monitor well -- static. RIH to TD @ 22261' md. Fill drill pipe and circulate 1000 stks. Pump out of hole f/ 22261' - 21917'md (84 spm @ 1900 psi). Inside 7" shoe. CBUx2 @ 84 spm with 50 rpm (20K ft lbs torque). Note: 1. Gas cut mud throughout one and one half annular volumes ranging between 2000 and 10000 units. 2. Gas units decreased to less than 400 after 1.3 bu. Condition mud & circulate above 7" shoe. 7 BPM, 1930 psi, 50 RPM. - Final gas units 58 - Monitor well - static. RIH to TD & pump 85 bbls @ 8 BPM, 2100 psi, 100 RPM. Pump out of hole to shoe @ 6 BPM. Wt up to 9.6 ppg from 9.3 ppg in 1 circulation. Max gas 508 units @ B/U. RIH to TD Circulate 1000 strokes & displace remaining 9.3 mud wi 9.6 ppg. - 8 BPM, 100 RPM Pump out of hole to shoe Circulate B/U @ 8 BPM, 1900 psi, 50 RPM. Max gas 200 units. - Dress remaining mud in surface system to 9.6 ppg. Monitor well - static Pump out of hole from 21,917'to 17587' @ 4.5 to 5 BPM, 1000 psi. 23 I I I sperry-sun DRILLING SERVICES Show Report Well Name: Location: Operator: Report Prepared By: Report Delivered To: Depth (MD) (TVD) to to Show Report DatelTime: I I I I I I I I I I Interpretation: ,Steam still analysis indicate the Kuparuk "A" to be water wet. No oil, odor, or visible sheen was present in samples or steam still jars. Sandstone in sample (19961-20068' MD ¡ showed very minor fluorescence with no cut fluorescence. .............-...--------................------...--------------------.. Depth 19990 ft Gas ---¡:J(;wTiñë-------Šûé1Tõñ----- ppm ppm ppm (Steam Still PPM's in 1000's) Depth Mud Chlorides (ppm):::: C1 C4 C1 C2 C1 C3 C1 C5 Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1/C5 38.4 1000.0 NPH flail ~Water Do;. Depth 20005 ft Gas I;1Units Mud Chlorides (ppm):::: ---¡:Îõ"WÏiñë-------šûê1:Iõñ-------šfiõ1Ñ-----------------------------------------------. ppm ppm ppm (Steam Still PPM's in 1000's) 100.0 ...... ...... pq Non-Producible Hydrocarbons ~~~;;..-... - >- Gas ----..... ---- Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1/C5 10.0 Oil NPH 1.0 n Non-Producible Hydrocarbons Mud Chlorides (ppm) :::: Hydrocarbon Ratios C1 C1 - - C3 C4 C1 C5 ..................-....--...---...--......--......--------------...--...-...--..... ppm ppm ppm (Steam Still PPM's in 1000's) C1 C2 C3 C4 C5 ::: ::: ::: ::: ::: Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1/C5 1000.0 NPH 100.0 ...-- -- -----------:;.;;.-.......~- - - I -" - -' I I I nGas naB Depth ppm ppm ppm (Steam Still PPM's in 1000's) ::: pq Non-Producible Hydrocarbons Mud Chlorides (ppm) Gas ...........................----...--....---......--............-------..... .....--- --- ---.. --- Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1IC5 10.0 ---------- _________u Oil NPH 1.0 Non-Producible Hydrocarbons I I sperry-sun DRILLING SERVICES Show Report Depth (MD) (TVD) Well Name: Location: Operator: Report Prepared By: Report Delivered To: jL~-~~.WP'!'!'!'lijWIJillìJl{l"ll'l'J1'''W\II!IiI!'I*I'!IjJOO'~''1I''W''!i''ill'i!J!J1rnffllij'j'!lì'''Ij¡JW¡!iI\'I'i'~''I(1II'!I~---IIì''''I~o\11I~'''W'lJíllil!!~""I'~ to to Show Report DatelTime: Interpretation: Analysis indicates the Ivishak to bear producible oil. Drilling Mud contained 3.5% lubricants. No oil odorlsheen visually present in steam still samples. Con¡;¡lomerate samples showed 30% or more yellow fluorescence with moderate milky white cut fluorescence. Mud Chlorides (ppm) '" C1 C2 Hydrocar on Ratios C1 C1 - - C3 C4 C1 Depth 22135 ft Gas -FIõV;añë-------šiüéfi(iõ---- ppm ppm ppm (Steam Still PPM's in 1000's) Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1/C5 Analysis nGas X Oìl nWater nNon-produCible Hydrocarbons Depth 22225 ft Gas ~~Onits Mud Chlorides (ppm) '" -FIõV;iiñë-------šiüéfi(iñ-------Šñõw----------------------------------------------- ppm ppm ppm (Steam Still PPM's in 1000's) Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1/C5 1000.0 NPH ...- ,..,- 100.0 -- -~ ,. ::; Gas "~ ---- .. 10.0 .. Oil~ '" NPH 1.0 I :~ nNon.producible Hydrocarbons Depth ft Gas -FIõwañë-------š-üéfiëiñ--- ppm ppm ppm (Steam Still PPM's in 1000's) Mud Chlorides (ppm) '" C1 C2 Hydrocarbon Ratios C1 C1 - - C3 C4 C1 05 1 , 1 -...-----------...-------...--...---................--- '" Hydrocarbon Ratios C1/C2 '" f:I:i:I### C1/C3 C1/C4 C1/C5 ·it f: '" '" :: nGas X Oil nwater Jl Non-Producible Hydrocarbons Gas Depth 1000.0 \\'~ NPH '-. 100.0 -_.--- -----~~~-~~;.;. ~;,,¡;,.~ ~.$!!!"- -.- ---- ~_... ... - "" ~ " Mud Chlorides (ppm) '" ppm ppm ppm (Steam Still PPM's in 1000's) C1 '" C2 :: C3 :: C4 :: C5 '" . - - -- ~ -----' ---- ~ ~ Oft Hydrocarbon Ratios C1/C2 C1/C3 C1/C4 C1/C5 NPH 1.0 I I 10.0 --~---~ Oil 'F ydrocarbons I I I I I I I I I I I I I I I I I I I sper"r"v-sun [JRI LLI N G SERVIC:::ES Customer: Well: Area: Lease: Rig: Job No.: Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 2 3/4/2004 4,621 o Rig Up/Rig Down Vaughn/Holt Mudlogger's Morning Report BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftlhr 0 ftlhr ( 0 ftIhr @ 0 ) Pump 1 0 spm DH flow - gpm Gas' 0 units 0 unit~ ( 0 units @ 0 ) Pump 2 0 spm Total flow 0 gpm Temp Out Deg F ( deg F @ ) Pump 3 spm AV @ DP - fpm Pump Pres 0 psi A V @ DC - fpm -rr-- Mud Wt In Mud Wt Out 28 secs API filt 0.0 ml HTHP _ Mud Wt at Max Gas 9.4 ppg ....Q.... cP YI....Q....lbs/1 00ft2 Gel~~ I ....Q....I ....Q.... Ibs/1 00ft2 pH ~ Sd ~ % 9.40 ppg 9.40 ppg Visc PV __H_ Bit No.: Wt On Bit: ,lets: X X TFA: 0.0000 ------ Total Revs on Bit: Footage for Bit Run Type: RPM: o Bit Size: 0 Hrs. On Bit: o Trip Depth: ft Trip Gas: NA Mud Cut: ppg CI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft vUllent Lithology: % % SLTST % SS % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly Magnets: Description of fillings: predominately small slivers, some small chunks, some curley as oz. 24 hr Recé Finishing up Rig Move, Spooling Drill Line. Preparing to N/U and test BOP. Logging Engineer: Mark Lindloff I Reg Wilson * 10000 units = 100% Gas In Air I I Customer: BP Alaska Report No.: 3 Well: NorthStar NS 21 Date: 3/5/2004 spe.....,.....,v- sun Area: North Slope Depth 4,621 [J A I L..L.. I N G SEAVIC:ES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: Testing BOP's Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughn/Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIh r 0 ftIh r ( 0 ftIhr @ 0 ) Pump 1 0 spm DH flow - gpm Gas' 0 units 0 unitf ( 0 units @ 0 ) Pump 2 0 spm Total flow 0 gpm - Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres 0 psi AV @ DC - fpm --rr--- Mud Wt In 8.60 ppg Visc 75 secs API tilt 14.4 ml HTHP Mud Wt at Max Gas --ª:L ppg - Mud Wt Out 8.60 ppg PV 16 cP YI23 Ibs/100ft2 Gel~ 8 I 9 I 10 Ibs/100ft2 pH~ Sd 0 % - - - - - - Bit No.: Type: Bit Size: 0 Jets: X X TFA: 0.0000 - - - - - - Wt On Bit: 0 RPM: 0 Hrs. On Bit: Total Revs on Bit: Footage for Bit Run Trip Depth: ft Trip Gas: NA Mud Cut: ppg CI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft % % SLTST % SS % %LCM - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly Magnets: oz. Description of fillings: predominately small slivers, some small chunks, some curley Os 24 hr Recé Testing BOP's Logging Engineer: Mark Lindloff I Reg Wilson * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 4 3/6/2004 4,621 o ReTorq DP Vaughn/Holt spe............v- sun CRIL-L-ING SERVICES Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIh r 0 ftIh r ( 0 ftIh r @ 0 ) Pump 1 0 spm DH flow gpm - Gas' 0 units 0 unit~ ( 0 units @ 0 ) Pump 2 0 spm Total flow 0 gpm - Temp Out Deg F ( deg F @ ) Pump 3 spm AV @ DP - fpm Pump Pres 0 psi AV @ DC - fpm -.r-- Mud Wt In Mud Wt Out 8.60 ppg 8.60 ppg Visc 60 secs API filt 14.2 ml HTHP _ Mud Wt at Max Gas ~ppg PV ....!i. cP YI...32...lbs/1 00ft2 Gels~ I ....!..-I ~ Ibs/1 00ft2 pH ~ Sd ~ % I I I I I I I I I I I I I I Bit No.: Wt On Bit: Type: o RPM: o Bit Size: 0 Hrs. On Bit: Jets: X X TFA: 0.0000 ------ Total Revs on Bit: Footage for Bit Run Trip Depth: Short Trip Depth Tight Spots: ft Trip Gas: ft Short Trip Gas: to to NA Mud Cut: ppg CI: ppm - Mud Cut: ppg Short Trip CI: ppm - to Feet of Fill on Bottom: ft % SS % %LCM - - % % SLTST - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly Magnets: Description of fillings: predominately small slivers, some small chunks, some curley Os oz. 24 hr Recé Rig respotted over wellhead. Running pipe in and out to retorque connections. Logging Engineer: Mark Lindloff I Reg Wilson · 10000 units = 100% Gas In Air I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 5 3/7/2004 4,621 o ReTorq 5.87DP Vaughn/Holt spe....,....,v-sun [J A I L..L.I N G 5 e A v I c: e 5 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIhr 0 fVhr ( 0 ftIhr @ 0 ) Pump 1 0 spm DH flow - gpm Gas· 0 units 0 unit~ ( 0 units @ 0 ) Pump 2 0 spm Total flow 0 gpm - Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres 0 psi AV @ DC - fpm -rr--- Mud Wt In Mud Wt Out 8.40 ppg 8.60 ppg Visc 28 secs API filt 14.2 ml HTHP _ Mud Wt at Max Gas 8.6 ppg PV ~cP YI...3:!....lbs/100ft2 Gel~~ I....!..-I ~lbs/100ft2 pH ~Sd ~ % I I I I Bit No.: Wt On Bit: Type: o RPM: o Bit Size: 0 Hrs. On Bit: Jets: X X TFA: 0.0000 ------ Total Revs on Bit: Footage for Bit Run _...",,---- Trip Depth: Short Trip Depth Tight Spots: to ft ft Trip Gas: Short Trip Gas: NA Mud Cut: Mud Cut: to - ppg CI: ppg Short Trip CI: Feet of Fill on Bottom: ppm ppm ft - to ,.... ...~~+ ;...._I__y: - % % SLTST % SS % %LCM - 1...... ft units ppg - - ft units ppg - - ft units ppg - - I I I I I I I I I I ft ft ft units - units - units - ppg ppg ppg Connection Gas and Mud Cut ft units - - ft units - - ft units - - - ppg ppg ppg - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly Magnets: Description of fillings: predominately small slivers, some small chunks, some curley as oz. 24 hr Rec¡ Making up 5.87" drill pipe and standing back. Logging Engineer: Mark Lindloff I Reg Wilson · 10000 units = 100% Gas In Air I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 6 3/8/2004 4,621 o RIH Vaughan/Holt I I I spel"'"'l"'"'v-sun C A I L-L I N G 5 E A V I c:: E 5 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 fVhr 0 fVhr 0 fVhr @ 0 ) Pump 1 0 spm DH flow 0 gpm Gas' 0 units 0 unit~ ( 0 units @ 0 ) Pump 2 0 spm Total flow 0 gpm Temp Out 0 Deg F ( 0 degF@ 0 ) Pump 3 0 spm AV @ DP 0 fpm Pump Pres 0 psi AV @ DC 0 fpm .......--- - I I I I I I I I I I I Mud Wt In Mud Wt Out 8.50 ppg 8.50 ppg Visc ~ secs API filt 14.2 ml HTHP 0.0 Mud Wt at Max Gas --ª2- ppg PV ~ YI...3!...lbs/1 00ft2 Gel~~ I ...!-I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: Wt On Bit: 3 o Type: RPM: RSX238HF+GS Bit Size: o Hrs. On Bit: 12 1/4 0.0 Jets: 9 X 12 X Total Revs on Bit: X - o X x TFA: 0.9940 --- Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft 0 % Sltst 0 % Sh 0 % sst % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Reel Piek up BHA#3 and RIH with the same. I I I Logging Engineer: Reg Wilson - Mark Lindloff · 10000 units = 100% Gas In Air I I I I I Customer: BP Alaska Report No.: 7 Well: NorthStar NS 21 Date: 3/9/2004 spe...,...,v- sun Area: North Slope Depth 6,542 CAI LLI N G SeAVII:::es Lease: NorthStar NS 21 Footage Last 24 hrs: 1,921 Rig: Nabors 33E Rig Activity: RIH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan/Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 107 ftIhr 286 ftIhr 676 ftIhr @ 5007 ) Pump 1 110 spm DH flow 0 gpm Gas' 77 units 39 unitf ( 147 units @ 6066 ) Pump 2 110 spm Total flow 931 gpm Temp Out 75 Deg F ( 75 degF@ 6542 ) Pump 3 0 spm AV @ DP 164 fpm Pump Pres # 1856 psi AV @ DC 229 fpm -,r-- - Mud Wt In 8.90 ppg Visc 61 secs API filt 4.8 ml HTHP 0.0 Mud Wt at Max Gas ~ppg Mud Wt Out 8.90 ppg PV 16 YI 23 Ibs/1 00ft2 Gel~ 5 I 8 I 9 Ibs/1 00ft2 pH 8.5 Sd 0 % - - - - - - - Bit No.: 3 Type: RSX238HF+GS Bit Size: 12 1/4 Jets: 9 X 12 X X X x TFA: 0.9940 - - - - Wt On Bit: 15 RPM: 127 Hrs. On Bit: 12.0 Total Revs on Bit: 84 Footage for Bit Run 1,921 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 18500 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft ". "..~Iogy: 0 % Sltst 0 % Sh 0 % sst % %LCM Connection Gas and Mud Cut ft units -ppg ft units ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Rec¡ RIH. Test csg, drill float equip & shoe track. Perform an FIT to 12.5 ppg equiv. Drilling ahead at report time. SV5 4882' MD, 3316' TVD SV4 5724' MD, 3622' TVD SV2 6340' MD, 3850' TVD Logging Engineer: Reg Wilson - Mark Lindloff . 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 8 3/1 0/2004 9,460 2,918 Drilling Polya/Holt I I I sper'r'v-sun CRI LLI N G 5ERVI C::E 5 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 331 ftIhr 224 ft/hr 858 ftIhr @ 9054 ) Pump 1 112 spm DH flow 0 gpm Gas' 211 units 93 unit~ ( 452 units @ 6066 ) Pump 2 112 spm Total flow 948 gpm Temp Out 88 Deg F ( 88 deg F @ 9266 ) Pump 3 0 spm AV @ DP 167 fpm Pump Pres # 2480 psi AV @ DC 232 fpm --rr-- - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc 66 secs API tilt 4.4 ml HTHP 0.0 Mud Wt at Max Gas ~ppg PV ~ YI~ Ibs/1 00ft2 Gels~ I ~ I ..2£..lbs/100ft2 pH ~ Sd 0.25 % Bit No.: 3 Type: RSX238HF+GS Bit Size: 12 1/4 Jets: 9 X 12 X X X x TFA: 0.9940 - - - - Wt On Bit: 10 RPM: 127 Hrs. On Bit: 28.0 Total Revs on Bit: 213 Footage for Bit Run 4,839 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 18500 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft Current Lithology: 100 % Sltst 0 % Sh 0 % sst % %LCM - - - - Connection Gas and Mud Cut ft units -ppg ft units -ppg ft units ppg - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Rec1 time. Drilling Ahead SV1, 7848' MD, 4407' TVD UGNU 8749' MD, 4719' TVD Logging Engineer: Reg Wilson - Mark Lindloff * 10000 units = 100% Gas In Air -_..._- I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 9 3/11/2004 11,881 2,421 Drilling Polya/Holt I I I sper'r'v-sun CRILLING SERVIt:ES Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 1 ftIhr 214 ftIhr 498 ftlhr @ 11268 ) Pump 1 111 spm DH flow 0 gpm Gas* 18 units 117 unit~ ( 694 units @ 10930 ) Pump 2 111 spm Total flow 939 gpm Temp Out 92 Deg F ( 93 deg F @ 10450 ) Pump 3 0 spm AV @ DP 166 fpm Pump Pres # 2798 psi AV @ DC 230 fpm ......-- - I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc 56 secs API filt 4.9 ml HTHP 0.0 Mud Wt at Max Gas ~ ppg PV ~ YI~ Ibs/1 00ft2 Gel~~ I .....:!..9..1 ~ Ibs/1 00ft2 pH ~ Sd ~ % .~"....... Bit No.: 3 Wt On Bit: 10 Type: RPM: RSX238HF+GS Bit Size: 75 Hrs. On Bit: 12 1/4 47.0 Jets: 9 X 12 X Total Revs on Bit: X X x TFA: 0.9940 ---- 345 Footage for Bit Run 7,260 I I I I I I I I I I Trip Depth: ft Trip Gas: Mud Cut: -ppg TripCI: 18500 ppm Short Trip Depth ft Short Trip Gas: Mud Cut: -ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: 0 ft Current Lithology: 65 0/0 Sltst 0 % Sh 35 % sd % %LCM r.... - - - - ;:'" :W~ , :1, !:i!:;.<"<~,,I>.''''''''''~ ft _ units _ppg ft _ units _ppg ft_units _ppg .. ~;'= 1 5:~.:':::::::":=::::';:===:"c"Z' Connection Gas and Mud Cut ft units - ft units - ft units - -ppg -ppg -ppg I nU-j ft units -ppg - ft units -ppg - ft units ppg - - ~ IT J I[] J_~! I I..... ~ i Ulli lliit fiûI Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 0.00 Ibs Rig 0 24 hr Rec. time. Drilling Ahead UGNU 8830' MD, 4755' TVD Logging Engineer: Reg Wilson - Mark Lindloff * 10000 units = 100% Gas In Air I I Customer: BP Alaska Report No.: 10 Well: NorthStar NS 21 Date: 3/12/2004 spe..........v-sun Area: North Slope Depth 13,676 [JRILLING SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 1,795 Rig: Nabors 33E Rig Activity: Drilling Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya/Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 125 ftIhr 182 ftIh r 486 ftIhr @ 13306 ) Pump 1 110 spm DH flow 0 gpm Gas' 65 units 67 unit~ ( 204 units @ 13315 ) Pump 2 114 spm Total flow 948 gpm Temp Out 102 Deg F ( 102 degF@ 13564 ) Pump 3 0 spm A V @ DP 167 fpm Pump Pres # ~ psi AV @ DC 232 fpm - Mud Wt In 9.20 ppg Vise 56 sees API filt 4.5 ml HTHP 0.0 Mud Wt at Max Gas ~ppg Mud Wt Out 9.20 ppg PV 18 YI 21 Ibs/100ft2 Gel~ 9 I 11 I 0 Ibs/100ft2 pH 8.3 Sd 0.25 % - - - - - - - Bit No.: 3 Type: RSX238HF+GS Bit Size: 12 1/4 Jets: 9 X 12 X X X x TFA: 0.9940 - - - - Wt On Bit: 17 RPM: 141 Hrs. On Bit: 66.0 Total Revs on Bit: 482 Footage for Bit Run 9,055 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 18500 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft e::r::. % Sltst 0 % Sh 35 % sd % %LCM ~, . - - - Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Ree. Drilling Ahead to 13676 time. SCHRADER BLUFF 13182' MD, 6305' TVD Logging Engineer: Reg Wilson - Mark Lindloff * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 11 3/13/2004 15,900 2,224 Drilling Polya/Holt spel"""l"""V- sun CRILLI N G SERVII::ES Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 74 ftIhr 141 ftIh r 303 ftIhr @ 13691 ) Pump 1 106 spm DH flow 0 gpm Gas' 75 units 144 unit~ ( 572 units @ 14245 ) Pump 2 106 spm Total flow 897 gpm Temp Out 102 Deg F ( 102 deg F @ 15827 ) Pump 3 0 spm AV @ DP 158 fpm Pump Pres # 3410 psi AV @ DC 220 fpm .....-- - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc ~ secs API lilt 5.0 ml HTHP 0.0 Mud Wt at Max Gas ~ ppg PV....!2... YI~ Ibs/1 00ft2 Gels~ I ~ I ~ Ibs/1 00ft2 pH ~ Sd 0.25 % Bit No.: Wt On Bit: 3 20 Type: RPM: RSX238HF+GS Bit Size: 141 Hrs. On Bit: 12 1/4 84.5 Jets: 9 X 12 X Total Revs on Bit: X X x TFA: ---- 639 Footage for Bit Run 0.9940 11 ,279 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 19000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft 30 % Sltst 70 % Clyst 0/0 sd % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap: Drilling Ahead to 15900 midnight depth ** Note: As of 0140,14 March 2004 finished drilling at 16018.7' MD, 7340' TVD Colville 15005' MD, 6963' TVD Logging Engineer: Reg Wilson - Mark Lindloff * 10000 units = 100% Gas In Air .. mmmm" "*""""",,"M'~'~'~- ,~ I I I I I I I I I I I I I I Customer: BP Alaska Report No.: 12 Well: NorthStar NS 21 Date: 3/14/2004 spe..,..,v-sun Area: North Slope Depth 16,018 CRI L..L..I N G SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 118 Rig: Nabors 33E Rig Activity: POOH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya/Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 fVhr 83 fVhr 120 fVhr @ 15906 ) Pump 1 0 spm DH flow 0 gpm Gas' 0 units 21 unit~ ( 144 units @ 15397 ) Pump 2 0 spm Total flow 0 gpm Temp Out 80 Deg F ( 80 deg F @ 16018 ) Pump 3 0 spm AV @ DP 0 fpm Pump Pres # 0 psi AV @ DC 0 fpm -.r--- - Mud Wt In 9.30 ppg Visc 46 secs API filt 5.0 ml HTHP 0.0 Mud Wt at Max Gas ~ppg - Mud Wt Out 9.20 ppg PV 12 YI 19 Ibs/100ft2 Gel~ 6 I 7 I 0 Ibs/100ft2 pH 8.3 Sd 0 % - - - - - - - Bit No.: 3 Type: RSX238HF+GS Bit Size: 12 1/4 Jets: 9 X 12 X X X x TFA: 0.9940 - - - - Wt On Bit: 0 RPM: 0 Hrs. On Bit: 86.0 Total Revs on Bit: 724 Footage for Bit Run 11 ,397 Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: 18500 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft '" 10 % Sltst 90 % Clyst % sd % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Finish drilling section @ 16018.7 MD, 7340' TVD. Circulate two sweeps around to clean hole and prep to POOH. POOH to 11050'. Pumped out to 8100'. CBU, pumped and reamed out to 7000' ft, CBU 1.5 times, POOH hole at report time. Lost 96 bbls to the hole. Held 2 safety huddles and attended pre-tour meetings Colville 15005' MD, 6963' TVD Logging Engineer: Reg Wilson - Mark Lindloff . 10000 units = 100% Gas In Air I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 13 3/15/2004 16,018 118 Testing BOP's Polya/Holt spel"""'l"""'v-sun CRI LLI N G SERVI t:: E 5 I I I I I I I I I I I I I I Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIhr 0 ftIhr 0 ftIhr @ 0 ) Pump 1 0 spm DH flow 0 gpm Gas· 0 units 0 unit~ ( 0 units @ 0 ) Pump 2 0 spm Total flow 0 gpm Temp Out 70 Deg F ( 75 deg F @ 16018 ) Pump 3 0 spm AV @ DP 0 fpm Pump Pres # 0 psi AV @ DC 0 fpm ......----- - Mud Wt In Mud Wt Out 9.30 ppg 9.30 ppg Visc 52 secs API filt 5.5 ml HTHP 0.0 Mud Wt at Max Gas ~ ppg PV -.!i. YI~ Ibs/1 00ft2 Gels~ I ~ I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: Wt On Bit: o Type: RPM: o Bit Size: Hrs. On Bit: Jets: X -- Total Revs on Bit: X X X x TFA: ---- Footage for Bit Run Trip Depth: ft Trip Gas: Short Trip Depth ft Short Trip Gas: Tight Spots: to to VUI 10 % Sltst 90 % Clyst - - Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: Feet of Fill on Bottom: 18500 o ppm ppm ft - % sd % %LCM - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o ...--....-.-.- 24hrRecap: Finished POOH, Well taking two bph static with an accumilation of 48 bls over the last 24 hrs. Worked on Top Drive, and currently rigging up to test BOP's. Held 2 safety huddles and attended pre-tour meetings Logging Engineer: Reg Wilson - Mark Lindloff · 10000 units = 100% Gas In Air I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 14 3/16/2004 16,018 o RIH Polya/Dinger 5pe~~V-5un CRIL-L-ING seRVIc:es Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIh r 0 ftIhr 0 ftIh r @ 15906 ) Pump 1 0 spm DH flow 0 gpm Gas* 0 units 0 unit~ ( 0 units @ 15397 ) Pump 2 0 spm Total flow 0 gpm Temp Out 65 Deg F ( 70 deg F @ 16018 ) Pump 3 0 spm AV @ DP 0 fpm Pump Pres # 0 psi AV @ DC 0 fpm -rr-- I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc ~ secs API filt 6.0 ml HTHP 0.0 Mud Wt at Max Gas 9.2 ppg PV ~ YI~ Ibs/1 00ft2 Gel~-2- I ~I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: WtOnBit: 4 o Type: RPM: RSX238HF+GN Bit Size: o Hrs. On Bit: 12 1/4 0.0 Jets: 9 X 12 X Total Revs on Bit: X - o X x TFA: --- Footage for Bit Run 0.9940 o Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: 18500 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft 10 % Sltst 90 % Clyst % sd % %LCM - Connection Gas and Mud Cut ft units -ppg ft units ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap: Testing BOP's and choke.M/U new BHA, RIH at report time. Held 2 safety huddles and attended pre-tour meetings and weekly safety meeting. Logging Engineer: Reg Wilson - Mark Lindloff * 10000 units = 100% Gas In Air I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 15 3/17/2004 16,515 497 Drilling Polya/Dinger 5per-r-V-5un CAILLING =EAVII::E= Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 157 fVhr 145 fVhr 319 ft/hr @ 16021 ) Pump 1 120 spm DH flow 0 gpm Gas' 53 units 51 unit~ ( 116 units @ 16262 ) Pump 2 120 spm Total flow 856 gpm Temp Out 78 Deg F ( 96 deg F @ 16400 ) Pump 3 0 spm AV @ DP 151 fpm Pump Pres # 2744 psi AV @ DC 210 fpm -,,-- - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc ...2i... secs API tilt 6.0 ml HTHP 0.0 Mud Wt at Max Gas ~ ppg PV ~ YI~ Ibs/1 00ft2 Gel~....2- I ~I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: WtOnBit: 4 21 Type: RPM: RSX238HF+GN Bit Size: 140 Hrs. On Bit: 12 1/4 4.0 Jets: 9 X 12 X Total Revs on Bit: X - 53 X x TFA: 0.9940 --- Footage for Bit Run 497 Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: 18500 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft vUII t111l L.ithology: 10 % Sltst 90 % Clyst % sd % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units -ppg ft units -ppg - - - - ft units -ppg ft units -ppg ft units ppg - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: 0.00 Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap Continue RIH, Wash last 8 stands down. Drill ahead to 16515. Pumps down, repair pumps. Currently drilling ahead. Held 2 safety huddles and attended pre-tour meetings. No new formations at this time. Next one should be Kulbik Logging Engineer: Reg Wilson - Mark Lindloff * 10000 units = 100% Gas In Air I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 16 3/18/2004 18,934 2,419 Drilling Polya/Dinger spe...,...,v- sun [JRIL..L..ING seRVices Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 177 ftIhr 141 ftIhr 265 ftIhr @ 18696 ) Pump 1 120 spm DH flow 0 gpm Gas' 100 units 125 unitf ( 290 units @ 17496 ) Pump 2 122 spm Total flow 856 gpm Temp Out Deg F ( deg F @ ) Pump 3 0 spm AV @ DP 151 fpm Pump Pres # ~ psi AV @ DC 210 fpm - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.30 ppg 9.30 ppg Vise 75 sees API filt 6.0 ml HTHP 0.0 Mud Wt at Max Gas ~ ppg PV ~ YI~ Ibs/1 00ft2 Gel~-2- I ~ I --.£....lbs/100ft2 pH ~ Sd ---E- % Bit No.: Wt On Bit: 4 21 Type: RPM: RSX238HF+GN Bit Size: 137 Hrs. On Bit: 12 1/4 21.2 Jets: 9 X 12 X Total Revs on Bit: X X x TFA: 0.9940 ---- 286 Footage for Bit Run 2,916 Trip Depth: ft Trip Gas: Mud Cut: -ppg TripCI: ppm Short Trip Depth ft Short Trip Gas: Mud Cut: -ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: 0 ft Current Lithology: 10 % Sltst 90 % Clyst % sd % %LCM - - - - ft ft ft - units _ ppg units _ ppg units _ ppg Connection Gas and Mud Cut ft units - ft units - ft units - units _ ppg units _ppg units _ ppg - -ppg -ppg -ppg ft ft ft - - - - Drilling Breaks before Drill Rate during after before Gas during after % Lithology Sst Sltst Sh - - - - - - - - - - - - - - - - II Ibs Rig 0 Depth to to to to 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 24 hr Recap: Drilled ahead. Logging Engineer: Reg Wilson - Tom Mansfield * 10000 units = 100% Gas In Air I I I I I Customer: BP Alaska Report No.: 17 Well: NorthStar NS 21 Date: 3/19/2004 5pe............v- 5Un Area: North Slope Depth 19,355 CRILLING SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 421 Rig: Nabors 33E Rig Activity: Wt. Up Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya/Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. na ftIhr 156 ftIhr 297 ftIhr @ 18972 ) Pump 1 108 spm DH flow 0 gpm Gas* 22 units 160 unit~ ( 289 units @ 19205 ) Pump 2 110 spm Total flow 775 gpm Temp Out Deg F ( degF@ ) Pump 3 0 spm AV @ DP 137 fpm Pump Pres # ~ psi AV @ DC 190 fpm - Mud Wt In 9.30 ppg Visc 47 secs API filt 5.6 ml HTHP 0.0 Mud Wt at Max Gas ~ppg Mud Wt Out 9.30 ppg PV 11 YI20 Ibs/100ft2 Gels 8 I 10 I 0 Ibs/100ft2 pH~ Sd 0 % - - - - - - Bit No.: 4 Type: RSX238HF+GN Bit Size: 12 1/4 Jets: 9 X 12 X X X x TFA: 0.9940 - - - - Wt On Bit: RPM: Hrs. On Bit: 23.9 Total Revs on Bit: 322 Footage for Bit Run 3,337 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth 19355 ft Short Trip Gas: 38 Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft ~~ % Sltst 10 % Clyst % % %LCM vV - - - Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Drilled to 19355'. Circulated weighted sweep. POOH to 14522'. UD single 5" DP wi washout. RIH to bottom at 19355'. Circulate weighted sweep. Prepare to weight up mud to 10.2 ppg wi spike fluid. Logging Engineer: Reg Wilson - Tom Mansfield * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 18 3/20/2004 20,109 754 Check Pumps Polya/Dinger 5pel"""'l"""'V-5Un CRIL.L.ING seRVices Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 75 ftIhr 56 ftIh r 230 ftIhr @ 19456 ) Pump 1 120 spm DH flow 0 gpm Gas' 218 units 320 unit~ ( 3275 units @ 19567 ) Pump 2 119 spm Total flow 857 gpm Temp Out 112 Deg F ( 112 deg F @ 20029 ) Pump 3 0 spm AV @ DP 151 fpm Pump Pres # 3300 psi AV @ DC 210 fpm .".-- - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 10.30 ppg 10.30 ppg Visc 2Q.... secs API filt 3.4 ml HTHP 13.2 Mud Wt at Max Gas ~ppg PV ~ YI.E...lbs/1 00ft2 Gel~~ I ~ I ~ Ibs/1 00ft2 pH ~ Sd 0.25 % Bit No.: Wt On Bit: 4 12 Type: RPM: RSX238HF+GN Bit Size: 118 Hrs. On Bit: 12 1/4 37.3 Jets: 9 X 12 X Total Revs on Bit: x - 490 X x TFA: 0.9940 --- Footage for Bit Run 4,091 Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: 0 ft Current Lithology: 45 % Sst 35 % Sltst 20 % Sh % %LCM - - - - Connection Gas and Mud Cut 19646 ft 2912 units ppg 19937 ft 1800 units -ppg ft units ppg - - - - 19744 ft 3440 units ppg ft units -ppg ft units ppg - - - - 19840 ft 1271 units -ppg ft units -ppg ft units -ppg - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap Wt up mud to 10.2 ppg. Drill ahead from 19355' to 20109'. Noticed pressure loss from pump #2. Work on pump. KALUBIK @ 19400' MD, 8761' TVD KUPARUK A @ 19961' MD, 9146' TVD Logging Engineer: Reg Wilson - Tom Mansfield · 10000 units = 100% Gas In Air I I Customer: BP Alaska Report No.: 19 Well: NorthStar NS 21 Date: 3/21/2004 spe.-..-.v-sun Area: North Slope Depth 20,227 CRIL-L-ING SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 118 Rig: Nabors 33E Rig Activity: Prep. to POOH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya/Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. na ftlhr 42.6 ftlhr 138 ftlhr @ 20111 ) Pump 1 120 spm DH flow 0 gpm Gas' 40 units 230 unitf ( 358 units @ 20100 ) Pump 2 120 spm Total flow 854 gpm Temp Out 115 Deg F ( 115 deg F @ 20227 ) Pump 3 0 spm AV @ DP 151 fpm Pump Pres # 3300 psi AV @ DC 210 fpm -rr-- - Mud Wt In 10.30 ppg Vise 47 sees API filt 3.8 ml HTHP 12.5 Mud Wt at Max Gas .....!.Qd... ppg Mud Wt Out 10.30 ppg PV 14 YI 23 Ibs/100ft2 Gel~ 8 I 12 I 14 Ibs/100ft2 pH ~Sd ~% - - - - - Bit No.: 4 Type: RSX238HF+GN Bit Size: 12 1/4 Jets: 9 X 12 X X X x TFA: 0.9940 - - - - Wt On Bit: 12 RPM: 118 Hrs. On Bit: 40.1 Total Revs on Bit: 521 Footage for Bit Run 4,209 Trip Depth: ft Trip Gas: Mud Cut: -ppg Trip CI: ppm Short Trip Depth 20227 ft Short Trip Gas: 3095 Mud Cut: ~ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: 0 ft ro, '..nn+ I õ+hn'nn' . 15 % Sst 60 % Sltst 25 % Sh % %LCM _. . - - - - Connection Gas and Mud Cut 20131 ft 811 units -ppg ft units ppg ft units -ppg - - - 20227 ft 1126 units ppg ft units ppg ft units -ppg - - - - - ft units ppg ft units -ppg ft units -ppg - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Repaired pump #2. Drilled to 20227' MD, 9355' TVD. Pumped a 10 vis sweep followed by a weighted sweep and circulated the hole clean. Short tripped 10 stands. Repeated 10 vis sweep followed by weighted sweep with a moderate amount of cuttings returns and a short trip gas of 3095 units, cutting mud weight to 9.6 ppg. Repeated 10 vis/weighted sweeps again. POOH. Hole appears to be taking approx. 3-5 bph. MILUVEACH @ 20183' MD, 9320' TVD Logging Engineer: Reg Wilson - Tom Mansfield * 10000 units:;:: 100% Gas In Air I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 20 3/22/2004 20,227 o UD BHA Polya/Dinger I I I sper"r"v-sun CAIL-L.ING SEAVICES I I I I I I I I I I I I I I Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. na ftIhr ftIhr ftIhr @ ) Pump 1 spm DH flow gpm - Gas· na units 35 unitf ( units @ ) Pump 2 spm Total flow gpm - Temp Out 90 Deg F ( degF@ ) Pump 3 spm AV @ DP fpm - Pump Pres ..,.,..-- psi A V @ DC - fpm Mud Wt In Mud Wt Out 10.30 ppg 10.30 ppg Vise 47 sees API tilt 4.0 ml HTHP 12.6 Mud Wt at Max Gas ....!Q1...ppg PV....!i. YI22..lbs/1 00lt2 Gel~~ I ~ I ~ Ibs/1 00lt2 pH ~ Sd ~ % Bit No.: Wt On Bit: 4 12 Type: RPM: RSX238HF+GN Bit Size: 118 Hrs. On Bit: 12 1/4 40.1 Jets: 9 X 12 X Total Revs on Bit: X - 521 X x TFA: 0.9940 --- Footage for Bit Run 4,209 Trip Depth: It Trip Gas: Mud Cut: -ppg Trip CI: ppm Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft Current Lithology: 15 % Sst 60 % Sltst 25 % Sh % %LCM Connection Gas and Mud Cut It units -ppg ft units -ppg ft units -ppg - - - ft units ppg ft units ppg It units -ppg - - - - - ft units -ppg ft units -ppg ft units -ppg - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap: POOH to 13800'. Spotted 150 bbl STEELSEAULCM pill across sands. POOH to 4985'. Pumped and backreamed from 4985' to 4953'. POOH to 4572'. CBU at 180 spm. RIH to 5100' and POOH to 4572'. Slipped and cut drill line and service rig. Circulated EP MUDLUBE sweep around CSG. Pump dry job and POOH. UD BHA at report time. Logging Engineer: Reg Wilson - Tom Mansfield * 10000 units = 100% Gas In Air I I I I I Customer: BP Alaska Report No.: 21 Well: NorthStar NS 21 Date: 3/23/2004 spe....,....,v-sun Area: North Slope Depth 20,227 CRIL-L-ING seAVIc:es Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: Run 9 5/8 CSG Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: VaughanlDinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. na fVhr fVhr fVhr @ ) Pump 1 spm DH flow gpm - Gas· na units 35 unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out 90 Deg F ( deg F @ ) Pump 3 spm AV @ DP - fpm Pump Pres .........- psi A V @ DC - fpm Mud Wt In 10.30 ppg Visc 51 secs API filt 3.6 ml HTHP 12.8 Mud Wt at Max Gas ~ppg - Mud Wt Out 10.30 ppg PV 14 YI 20 Ibs/100ft2 Gel~ 6 I 10 I 12 Ibs/1 00ft2 pH 8.0 Sd 0 % - - - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft Current Lithology: % % % % %LCM - - - - Connection Gas and Mud Cut ft units -ppg ft units -ppg ft units -ppg - - - ft units -ppg ft units -ppg ft units -ppg - - - ft units -ppg ft units ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to -a - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: UD BHA. R/U csg equip. RIH w/9 5/8" CSG to shoe. Circulate one casing volume. Continue RIH wi 9 518" CSG. Logging Engineer: Dave Hutchins - Tom Mansfield * 10000 units::: 100% Gas In Air I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 22 3/24/2004 20,227 o Prep to CMT Vaughan/Dinger sper"'r"'v-sun CRIL.L.ING SERVICES I I I I I I I I I I I I I I Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. fVhr fVhr fVhr @ ) Pump 1 10 spm DH flow gpm - Gas· units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out Deg F ( deg F @ ) Pump 3 spm AV @ DP - fpm Pump Pres 785 psi A V @ DC 14 fpm -..-- - Mud Wt In Mud Wt Out 10.30 ppg 10.30 ppg Visc ~ secs API filt 4.4 ml HTH P 14.0 Mud Wt at Max Gas -1Ql.... ppg PV 12 YI 20 Ibs/100ft2 GeIE--L- I ...!2.-1 ~ Ibs/1 00ft2 pH ~ Sd ~ % - - Bit No.: Type: Bit Size: Wt On Bit: RPM: Hrs. On Bit: m Trip Depth: ft Trip Gas: Short Trip Depth ft Short Trip Gas: Tight Spots: to to ro. ."^"+ I õ+h^l^gy: % % - - Jets: X X --- Total Revs on Bit: X X x TFA: --- Footage for Bit Run Mud Cut: _ ppg Trip CI: ppm Mud Cut: _ ppg Short Trip CI: ppm to Feet of Fill on Bottom: ft % % %LCM - Connection Gas and Mud Cut ft units -ppg ft units -ppg ft units -ppg - - - ft units -ppg ft units -ppg ft units ppg - - - - ft units -ppg ft units -ppg ft units -ppg - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24hrRecap Continue running 9 5/8" casing. Stopped receiving returns from displacement at approx. 19100'. Landed casing at 20207'. Started circulating with 50% returns at 1/2 bpm. Staged up pumps to 3 bpm with 5% returns. Slowed pumps to 1 bpm with 10-15% returns. Logging Engineer: Wayne Hermanson - Tom Mansfield · 10000 units = 100% Gas In Air I I I Customer: BP Alaska Report No.: 23 Well: NorthStar NS 21 Date: 3/25/2004 spel'"""l'"""V- sun Area: North Slope Depth 20,227 [JRIL-LING SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: Test BOPE Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan/Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. fVhr fVhr fVhr @ ) Pump 1 spm DH flow - gpm Gas* units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres -rr-- psi AV @ DC - fpm Mud Wt In 10.20 ppg Vise 50 sees API filt 5.0 ml HTHP Mud Wt at Max Gas ppg - - - Mud Wt Out 10.20 ppg PV 14 YI 22 Ibs/100ft2 Gel~ 8 I 14 I 18 Ibs/100ft2 pH~ Sd 0 % - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run -- Trip Depth: ft Trip Gas: Mud Cut: -ppg TripC/: ppm Short Trip Depth ft Short Trip Gas: Mud Cut: -ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: ft ~ Lithology: % % % % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: 286 bbls lost while staging up pumps. Cement 9 5/8" casing. Lost 922 bbls while cementing with approx. 10% returns. UD casing equipment. Set pack-off and test to 5000 psi. Pumped 275 bbls of 10.3 mud down 13318" X 9 5/8" annulus. Test BOPE. t Logging Engineer: Wayne Hermanson - Tom Mansfield * 10000 units = 100% Gas In Air , I I I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 24 3/26/2004 20,227 o RIH to drill 8.5" Vaughan/Dinger spe,-,,-,v- sun CRIL-L-ING seRVIc:es . ....... ... Current R.O.P. Gas' Temp Out ftIhr units Deg F 24 hr Avg ftlhr unit~ ( ( 24 hr Max ftIhr @ units @ deg F @ Pump and Flow Data ) Pump 1 spm DH flow - gpm ) Pump 2 spm Total flow - gpm ) Pump 3 spm AV @ DP - fpm Pump Pres psi A V @ DC - fpm -rr-- I I I I I I I I Mud Wt In Mud Wt Out 10.30 ppg 10.30 ppg Visc ~ secs API filt 5.0 ml HTHP _ Mud Wt at Max Gas _ ppg PV ~ YI~ Ibs/1 00ft2 Gel~---2- I ~I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: 5 Wt On Bit: Type: HCM605 Bit Size: 81/2 RPM: Hrs. On Bit: Jets: 12 X 12 X 12 X 12 X 12 x TFA: 0.5520 - Total Revs on Bit: Footage for Bit Run Trip Depth: Short Trip Depth Tight Spots: Current Lithology: ft Trip Gas: Mud Cut: ppg TripCI: - ft Short Trip Gas: Mud Cut: ppg Short Trip CI: - to to to Feet of Fill on Bottom: % % % % ppm ppm ft %LCM Connection Gas and Mud Cut ft units -ppg ft units ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks before Drill Rate during after before Gas during after % Lithology Sst Sltst Sh - - - - - - - - - - - - ~ - - - - Ibs Rig 0 Depth I I I I I I to to to to ",~""..., 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 24 hr Recap Finish testing BOPE. M/U 8.5" BHA and surface test. Freeze protect 13 3/8" X 9 5/8" annulus. RIH w/ 5" DP. Slip and cut drilling line. RIH with 57/8" DP to tag cement. Logging Engineer: Wayne Hermanson - Tom Mansfield · 10000 units;::: 100% Gas In Air I I I I I Customer: BP Alaska Report No.: 25 Well: NorthStar NS 21 Date: 3/27/2004 spe....,....,v-sun Area: North Slope Depth 20,582 [:J R I L.L.I N G seRVIc::es Lease: NorthStar NS 21 Footage Last 24 hrs: 355 Rig: Nabors 33E Rig Activity: Drilling ahead Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan/Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 44 fVhr 40 fVhr 169 fVhr @ 20507 ) Pump 1 86 spm DH flow gpm - Gas· 48 units 52 unitf ( 97 units @ 50248 ) Pump 2 68 spm Total flow 547 gpm Temp Out 90 Deg F ( 90 degF@ 20407 ) Pump 3 spm AV @ DP 248 fpm Pump Pres 4015 psi AV @ DC 399 fpm ..,.-- - Mud Wt In 12.50 ppg Visc 48 secs API filt 3.6 ml HTHP 12.8 Mud Wt at Max Gas 12.4 ppg - - Mud Wt Out 12.50 ppg PV 35 YI 38 Ibs/100ft2 Gelf 9 I 30 I 0 Ibs/100ft2 pH ~Sd ~% - - - - - Bit No.: 5 Type: HCM605 Bit Size: 81/2 Jets: 12 X 12 X 12 X 12 X 12 x TFA: 0.5520 ----- - Wt On Bit: 22 RPM: 140 Hrs. On Bit: 9.7 Total Revs on Bit: 96.5K Footage for Bit Run 355 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft '"'u"""" 75 % SH 25 % SLTST % % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - . . Drilling Breaks Depth Drill Rate Gas % Lithology before during atter before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Tested 9 5/8" to 4000 psi for 30 min. Drilled cement and float equipment and washed to shoe at 20207' . Spiked mud to 12.5 ppg. Drill new formation to 20247' and perform FIT to 15 ppg EMW. Drilling ahead. Logging Engineer: Wayne Hermanson - Tom Mansfield . 10000 units = 100% Gas In Air ....JII I I I I I I I I I I I I I I I I I I I Customer: BP Alaska Report No.: 26 Well: NorthStar NS 21 Date: 3/28/2004 spe..........v-sun Area: North Slope Depth 21,590 CRIL-L-ING seRVIc:es Lease: NorthStar NS 21 Footage Last 24 hrs: 1,008 Rig: Nabors 33E Rig Activity: Drilling ahead Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan/Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 69 ftIhr 52.5 ftIhr 135 ft/hr @ 20992 ) Pump 1 68 spm DH flow gpm - Gas' 128 units 84 unit~ ( 138 units @ 21538 ) Pump 2 90 spm Total flow 562 gpm Temp Out 95 Deg F ( 95 deg F @ 21558 ) Pump 3 spm AV @ DP 205 fpm Pump Pres 4150 psi AV @ DC 295 fpm -rr-- Mud Wt In 12.30 ppg Vise 57 sees API filt 2.8 ml HTHP 10.8 Mud Wt at Max Gas 12.3 ppg - Mud Wt Out 12.30 ppg PV 28 YI25 Ibs/100ft2 Gels 6 I 22 I 27 Ibs/100ft2 pH~ Sd 0.25 % - - - - - Bit No.: 5 Type: HCM605 Bit Size: 81/2 Jets: 12 X 12 X 12 X 12 X 12 x TFA: 0.5520 ---- - Wt On Bit: 24 RPM: 140 Hrs. On Bit: 28.9 Total Revs on Bit: 323.3K Footage for Bit Run 1,363 Trip Depth: ft Trip Gas: Mud Cut: -ppg TripCI: ppm Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft 75 % SH 25 % SLTST % % %LCM - - - - Connection Gas and Mud Cut ft units -ppg ft units -ppg ft units ppg - - - - ft units -ppg ft units -ppg ft units ppg - - - - ft units -ppg ft units -ppg ft units ppg - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Drilled ahead in 8 1/2" hole. KINGAK @ 20760' MD, 9802' TVD Logging Engineer: Wayne Hermanson - Tom Mansfield * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I Customer: BP Alaska Report No.: 27 Well: NorthStar NS 21 Date: 3/29/2004 spe............v-sun Area: North Slope Depth 21,985 CRI L..L..I N G SERVIC:ES Lease: NorthStar NS 21 Footage Last 24 hrs: 395 Rig: Nabors 33E Rig Activity: Spot LCM to POOH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan/Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. fVhr 52 fVhr 118 fVhr @ 21963 ) Pump 1 60 spm DH flow gpm - Gas' units 84 unit~ ( 231 units @ 21882 ) Pump 2 spm Total flow 213 gpm Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP 78 fpm Pump Pres 1050 psi AV @ DC 112 fpm ~ - Mud Wt In 12.30 ppg Visc ....É1..- secs API filt 2.8 ml HTHP 10.9 Mud Wt at Max Gas 12.3 ppg - Mud Wt Out 12.30 ppg PV 23 YI 18 Ibs/100ft2 Gel~ 7 I 21 I 27 Ibs/100ft2 pH~ Sd 0.25 % - - - - - Bit No.: 5 Type: HCM605 Bit Size: 81/2 Jets: 12 X 12 X 12 X 12 X 12 x TFA: 0.5520 -- - Wt On Bit: RPM: Hrs. On Bit: 36.5 Total Revs on Bit: 413K Footage for Bit Run 1,758 Trip Depth: ft Trip Gas: Mud Cut: -ppg TripCI: ppm Short Trip Depth 21985 ft Short Trip Gas: 273 Mud Cut: -ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: ft Current Lithology: 30 % Sst 10 % Sltst 60 % Sh % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units -ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Drilled ahead to 21975' and began losing 5 bpm to hole. T.D. of 8 1/2" hole section at 21985' MD, 10941' TVD. Spotted LCM/SteelSeal pill. Short trip to shoe at 20200'. Circulated at shoe without losses. RIH to 21883'. Circulated hi-vis/Barafibre sweep. Initial losses were 10-15 bph and increased to 100 bph. Short trip gas was 273 units. Spotting 50 bbl LCM pill in preparation to POOH. SAG RIVER @ 21919' MD, 10876' TVD Logging Engineer: Wayne Hermanson - Tom Mansfield * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I Customer: BP Alaska Report No.: 28 Well: NorthStar NS 21 Date: 3/30/2004 sper""r""\{-SUn Area: North Slope Depth 21,985 CAI L-LI N G seAVIc:es Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: UD BHA Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan I Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr 125 ftlh r 129 ftIhr @ 0:05 ) Pump 1 spm DH flow gpm - Gas' units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres -..-- psi A V @ DC - fpm Mud Wt In 12.30 ppg Visc 59 secs API filt 2.6 ml HTHP 10.8 Mud Wt at Max Gas ppg - Mud Wt Out 12.30 ppg PV 23 YI 24 Ibs/1 00ft2 Gel~ 6 I 21 I 26 Ibs/1 00ft2 pH 9.0 Sd 0 % - - - - - - - Bit No.: 5 Type: HCM605 Bit Size: 81/2 Jets: 12 X 12 X 12 X 12 X 12 x TFA: 0.5520 -- --- - Wt On Bit: RPM: Hrs. On Bit: 36.5 Total Revs on Bit: 413K Footage for Bit Run 1,758 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: -ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: ft ~ % % % % %LCM ~u,' - - - - Connection Gas and Mud Cut ft units -ppg ft units -ppg ft units ppg - - - - ft units -ppg ft units ppg ft units ppg - - - - - ft units -ppg ft units ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Spotted LCM/SteelSeal pill on bottom. POOH 7 stnds. Stage up pumps to 82 spm. Mud loss 10-15 bph. Pumped out of hole to 9 5/8" shoe at 20207'. Monitored well. Pumped dry job. POOH. Tight spot noticed at 500'. Attempted to RIH, would not go. UD BHA at report time. 35 bbl mud loss on trip out so far. Logging Engineer: Wayne Hermanson - Tom Mansfield * 10000 units = 100% Gas In Air .~ I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 29 3/31/2004 21,985 o Fish 9 5/8" eSG Vaughan I Holt I I I spe........v- sun [JRIL...L...ING seRVIc::es Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ft/hr @ ) Pump 1 spm DH flow gpm - Gas' units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out Deg F ( deg F @ ) Pump 3 spm AV @ DP - fpm Pump Pres psi A V @ DC - fpm -rr- I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 12.30 ppg 12.30 ppg Vise ~sees APlfilt 2.6 ml HTHP 10.7 Mud Wtat Max Gas _ppg PV 25 YI 23 Ibs/1 00ft2 Gels~ I ...3.!....1 ~ Ibs/1 00ft2 pH ~ Sd ~ % - - Bit No.: Type: Bit Size: Wt On Bit: RPM: Hrs. On Bit: Trip Depth: ft Trip Gas: Short Trip Depth ft Short Trip Gas: Tight Spots: to to Current Lithology: % % - - Jets: X X X --- Total Revs on Bit: X x TFA: --- Footage for Bit Run Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: Feet of Filion Bottom: ppm ppm ft - % % %LCM - - Connection Gas and Mud Cut ft units -ppg ft units -ppg ft units ppg - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap UD 81/2" BHA. 9518" casing parted approx 500' down. RIH with retrievable bridge plug on 5" DP and set. Displaced with 9 ppg brine. Pulled 9 5/8" casing at part and POOH with casing fish. R/U 9 5/8" Back-off tool on 5" DP and RIH to 505'. Attempted to set 9 518" Back-off tool, unsuccesful. POOH. M/U 9 5/8" Stop ring on 5" DP to tag top of 95/8" casing and RIH. Tagged 9 5/8" casing top at 455'. POOH with Stop ring. Logging Engineer: Wayne Hermanson - Tom Mansfield * 10000 units = 100% Gas In Air I I I I I I I I I I Customer: BP Alaska Report No.: 30 Well: NorthStar NS 21 Date: 4/1/2004 sper"r"v-sun Area: North Slope Depth 21,985 [J R I L..L.. I N G SERVIt:ES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: HANGING 9 5/8" eSG Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan / Holt Shows: ~ Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. fVhr fVhr fVhr @ ) Pump 1 spm DH flow gpm - Gas' units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out 75 Deg F ( degF@ ) Pump 3 spm AV @ DP fpm - Pump Pres ......--- psi A V @ DC - fpm Mud Wt In 12.30 ppg Vise 59 sees API filt 2.5 ml HTHP 10.8 Mud Wt at Max Gas ppg - - : Mud Wt Out 12.30 ppg PV 22 YI 26 Ibs/100ft2 Gel~ 6 I 17 I 23 Ibs/1 00ft2 pH 9.1 Sd 0 % - - - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft ology: % % % % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 ----- 24 hr Recap: Back out of 9 5/8" casing, PU spear and RIH, POOH to rig up with mule shoe. RIH and back out of fish. Spear hung up, POOH, redress and RIH. Tagged up and POOH. RIH with new 9 5/8" casing. Screw in and test to 3000 psi for 10 minutes, passed, Drain the stack, broke loose and working on hanging casing at report time. Logging Engineer: Wayne Hermanson I Mark Lindloff . 10000 units = 100% Gas In Air ~T_'. I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 31 4/2/2004 21,985 o Pulling Bridge Plug Vaughan / Holt spe..........v-sun CRIL...L...I N G SERVII::ES Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftlhr ftIh r ftIhr @ ) Pump 1 spm DH flow - gpm Gas· units unit~ ( units @ ) Pump 2 spm Total flow - gpm Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP - fpm Pump Pres psi AV @ DC - fpm ..,,-- I I Mud Wt In Mud Wt Out 12.30 ppg 12.30 ppg Vise ~sees API lilt 2.6 ml HTHP 10.9 Mud Wt at Max Gas _ppg PV..E.... YI~ Ibs/1 00ft2 Gel~~ I ~ I ~ Ibs/1 00ft2 pH ~ Sd ~ % I I I I I I I I I I I I Bit No.: Wt On Bit: Type: RPM: Bit Size: Hrs. On Bit: Jets: X -- Total Revs on Bit: x X X x TFA: ---- Footage for Bit Run Trip Depth: Short Trip Depth Tight Spots: ft Trip Gas: ft Short Trip Gas: to to .~ Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: Feet of Fill on Bottom: ppm ppm ft - "'. I 'thology: % % % % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks before Drill Rate during after before Gas during after % Lithology Sst Sltst Sh - - - - - - - - - - - - - - - - . ","--.",_.;m Depth to to to to 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o -- -. 24hrRecap Set back stck and cut casing. Set pack off and test to 5,000 psi. NU/BOP"s and test to 4800 psi. Made 2 fishing runs with milling,sweep hole clean, vewry little in junk baskets. Ran in and latched onto bridge plug Hole took 7 bbls when bridge plug was released. Having to pump out periodically while pulling bridge plug. time. 11IIII Held one safety huddle up and went to pretour meetings. Logging Engineer: Doug Wilson I Mark Lindloff · 10000 units = 100% Gas In Air I I I I I Customer: BP Alaska Report No.: 32 Well: NorthStar NS 21 Date: 4/3/2004 spef"""f"""V- sun Area: North Slope Depth 21,985 I:J R I L..L.. I N 13 SERVIC=ES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: Servicing Rig Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan I Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 spm DH flow gpm - Gas' units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP fpm - Pump Pres --rr---- psi A V @ DC - fpm Mud Wt In 12.30 ppg Visc 56 secs API tilt 2.6 ml HTHP 10.9 Mud Wt at Max Gas ppg - Mud Wt Out 12.30 ppg PV 20 YI 23 Ibs/100ft2 Gels 6 I 13 I 27 Ibs/100ft2 pH ~Sd ~% - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run - Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft % % % % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - Drilling Breaks ¡-~ Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Finish Laying Down BHA. Change out rams, test BOP's and slip and cut drill line. Currently sevicing Top Drive Held two safety huddle ups and went to pretour meetings. Logging Engineer: Doug Wilson I Mark Lindloff * 10000 units = 100% Gas In Air -~~.,- . .mm .....mm.. I I I I I I I I I I I I I I I I I I I Customer: BP Alaska Report No.: 33 Well: NorthStar NS 21 Date: 4/4/2004 spel"""l"""V- sun Area: North Slope Depth 21,985 [:J R I 1... 1... I N c¡¡ seRVices Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: Wiper Trip/RIH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan 1 Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 75 spm DH flow gpm - Gas' units unit~ ( units @ ) Pump 2 80 spm Total flow 551 gpm Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP 268 fpm Pump Pres 2050 psi AV @ DC 453 fpm ........----- - Mud Wt In 12.30 ppg Visc 62 secs API tilt 2.6 ml HTHP 10.9 Mud Wt at Max Gas ppg - - Mud Wt Out 12.30 ppg PV 20 # YI 26 Ibs/100ft2 Gel~ 6 I 15 I 29 Ibs/100ft2 pH 8.8 Sd 0 % - - - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run , Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft ,~ :;~" v"t Lithology: 60 % SH 10 % SLST 30 % SST % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units -ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Finish servicing Top Drive, Pull test Plug, M/U BHA, RIH and shallow test. RIH to 5000' md and CBU Trip gas peeked at 116 units, Continue to RIH to 10000' md, CBU Gas peaked 72 units. Continued to RIH to 14450' md, Currently working on Top Drive at report time. Held two safety huddle ups and went to pretour meetings. Logging Engineer: Doug Wilson I Mark Lindloff . 10000 units = 100% Gas In Air ,--- I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 34 4/5/2004 21,985 o Wiper TriplPOH Vaughan 1 Holt I I spe............v-sun CRIL..L..ING seRVIc::es I Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 90 spm DH flow - gpm Gas' units unit~ ( units @ ) Pump 2 70 spm Total flow 569 gpm Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP 276 fpm Pump Pres 4175 psi AV @ DC 468 fpm .....----- - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 12.30 ppg 12.30 ppg Visc ..2!...... secs API filt 2.6 ml HTH P 10.9 Mud Wt at Max Gas _ ppg PV ..E... # YI~ Ibs/1 00ft2 Gel~-2- I ~ I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: Wt On Bit: Type: RPM: Bit Size: Hrs. On Bit: Jets: X X X --- Total Revs on Bit: X x TFA: --- Footage for Bit Run Trip Depth: Short Trip Depth Tight Spots: to to Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: 49000 Feet of Fill on Bottom: ppm ppm ft ft ft Trip Gas: Short Trip Gas: - " h';' 60 % SH 10 % SLST 30 % SST % %LCM - - - ft units ppg - - ft units ppg - - ft units ppg - - ~_"'n m. I..~ ,. Connection Gas and Mud Cut ft units - - ft units - - ft units - - - ppg ppg ppg ft ft ft - units units units - ppg ppg ppg - - - ".- Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap Continue to Repairing Top Drive, Continue to RIH to shoe, CBU, TG 258 units. Check & Condtion mud, Mud Weights fluxuating between 13-14 ppg. Work on Top Drive, Continue to RIH to 21975' md. POOH to shoe, pumped dry job and currently POOH>. Held two safety huddle ups. Logging Engineer: Doug Wilson I Mark Lindloff · 10000 units = 100% Gas In Air I I Customer: BP Alaska Report No.: 35 Well: NorthStar NS 21 Date: 4/6/2004 spe....,....,v-sun Area: North Slope Depth 21,985 [J R I L..L..I N G SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: RIH W/Liner Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Vaughan 1 Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftlhr ftIh r ftlhr @ ) Pump 1 0 spm DH flow - gpm Gas· units unit~ ( units @ ) Pump 2 0 spm Total flow 0 gpm Temp Out 80 Deg F ( deg F @ ) Pump 3 spm AV @ DP 0 fpm Pump Pres 0 psi AV @ DC 0 fpm ...,.,..--- - - -- ,,>.."..,.---- Mud Wt In 12.30 ppg Visc 55 secs API filt 2.6 ml HTHP 10.9 Mud Wt at Max Gas ppg - - Mud Wt Out 12.30 ppg PV 22 # YI 27 Ibs/100ft2 Gel~ 7 I 15 I 26 Ibs/100ft2 pH~ Sd 0 % - - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: 49000 ppm - Tight Spots: to to to Feet of Fill on Bottom: ft ology: 60 % SH 10 % SLST 30 % SST % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - m__~. .._ . 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Finish POOH, LD BHA. Make up 7" liner running equipment. CBU one liner volume. Currently RIH with 7" liner on 5" drill pipe. Held two safety huddle ups. went to weekly safety meetings. Logging Engineer: Doug Wilson I Mark Lindloff . 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I Customer: BP Alaska Report No.: 36 Well: NorthStar NS 21 Date: 4/7/2004 spe....,....,v-sun Area: North Slope Depth 21,985 CRILLING SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: RIH W/Liner Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya 1 Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 0 spm DH flow gpm - Gas· units unit~ ( units @ ) Pump 2 0 spm Total flow 0 gpm Temp Out 80 Deg F ( deg F @ ) Pump 3 spm AV @ DP 0 fpm Pump Pres 0 psi A V @ DC 0 fpm --rr-- - Mud Wt In 12.30 ppg Visc 54 secs API filt 2.6 ml HTHP 10.9 Mud Wt at Max Gas ppg - - Mud WI Out 12.30 ppg PV 20 # YI 28 Ibs/100ft2 Gel~ 7 I 16 I 28 Ibs/1 00ft2 pH 9.0 Sd 0 % - - - - - - - Bit No.: Type: Bit Size: Jets: X X X X x TFA: - - - - - - Wt On Bit: RPM: Hrs. On Bit: Total Revs on Bit: Footage for Bit Run Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: 49000 ppm - Tight Spots: to to to Feet of Fill on Bottom: ft --- ---- vU""'" vv % SH 10 % SLST 30 % SST % %LCM - - - -- Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units -ppg ft units ppg ft units ppg - - - - - ,.m Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - - . .;¡¡; 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Continue to run 7" liner in hole. 55 units of trip gas max while circulating at the shoe. Currently RIH with 7" liner with 5" drill pipe. Held two safety huddle ups and pretour meetings. Logging Engineer: Reg Wilson I Mark Lindloff . 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 37 4/8/2004 21,985 o POOH Polya / Holt spe.....,.....,v- sun [J R I L..L.. I N G S E R V I c:: E S Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 0 spm DH flow gpm - Gas· units 55 unit~ ( units @ ) Pump 2 0 spm Total flow 0 gpm Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP 0 fpm Pump Pres 0 psi A V @ DC 0 fpm -n-- - I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 12.50 ppg 12.50 ppg Visc 2§... secs API tilt 2.9 ml HTHP 0.0 Mud Wt at Max Gas _ ppg PV ~ # YI...3Z...lbs/1 00ft2 Gels~ I ~ I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: Wt On Bit: Type: RPM: Bit Size: Hrs. On Bit: Jets: X X X --- Total Revs on Bit: x x TFA: --- Footage for Bit Run Trip Depth: Short Trip Depth Tight Spots: 21985 ft ft Trip Gas: Short Trip Gas: 326 Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: Feet of Fill on Bottom: 48000 ppm ppm ft - to to Current Lithology: 60 % SH 10 % SLST 30 % SST % %LCM Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap: Wash the last three stands down, circulate liner, increasing rate slowly. Cement liner with no mud losses. Set hanger and packer. Received back 25 bbls of excess cement. Slip and cut drill line. Currently POOH Max gas Circulated out 326 units. Top of liner 19946' md, bottom of liner 21945' md Held two safety huddle ups and pretour meetings. Logging Engineer: Reg Wilson I Mark Lindloff . 10000 units == 100% Gas In Air I I I I Customer: BP Alaska Report No.: 38 Well: NorthStar NS 21 Date: 4/9/2004 spe,...,,...,v-sun Area: North Slope Depth 21,985 C RILL I N G SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: RIH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya 1 Holt Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIh r @ ) Pump 1 0 spm DH flow gpm - Gas' units unit! ( units @ ) Pump 2 0 spm Total flow 0 gpm Temp Out 75 Deg F ( degF@ ) Pump 3 spm AV @ DP 0 fpm Pump Pres 0 psi AV @ DC 0 fpm .....-- - Mud Wt In 12.30 ppg Visc 52 secs API filt 3.6 ml HTHP 0.0 Mud Wt at Max Gas ppg - Mud Wt Out 12.30 ppg PV 20 # yp 25 Ibs/100ft2 Gel~ 6 I 10 I 13 Ibs/1 00ft2 pH 8.7 Sd 0 % - - - - - - - Bit No.: 7 Type: STX30CDX Bit Size: 61/8 Jets: 15 X 15 X 15 X X x TFA: 0.5160 --- - - - Wt On Bit: RPM: Hrs. On Bit: 0.0 Total Revs on Bit: 0 Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 48000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft c:n 0/ SH 10 % SLST 30 % SST % %LCM : - - - - Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Completed POOH, Tested BOP, MU/BHA and tested tools. PU 4" DP. Currently RIH Held two safety huddle ups and pretour meetings. Logging Engineer: Reg Wilson I Mark Lindloff * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I spe............v- sun CRIL-L-ING seRVIc:es Customer: Well: Area: Lease: Rig: Job No.: Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 39 4/1 0/2004 21,985 o Drill Out Shoe Polya / Holt Mudlogger's Morning Report BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 0 spm DH flow gpm - Gas' 64 units 54 unit~ ( 84 units @ 21985 ) Pump 2 74 spm Total flow 263 gpm Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP 109 fpm Pump Pres 1400 psi AV @ DC 383 fpm -rr- - Mud Wt In Mud Wt Out Visc 45 secs API filt 4.4 ml HTHP 0.0 Mud Wt at Max Gas _ ppg PV ~ # YP ...32...lbs/1 00ft2 Gels~ I ....!..-I ~ Ibs/1 00ft2 pH ~ Sd ~ % 9.10 ppg 9.10 ppg Bit No.: 7 Type: STX30CDX Bit Size: 61/8 Jets: 15 X 15 X 15 X X x TFA: 0.5160 - - - Wt On Bit: 45 RPM: 0 Hrs. On Bit: 0.0 Total Revs on Bit: 22 Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 18000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft Current Lithology: 60 % SH 10 0/0 SLST 30 % SST % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units ppg ft units ppg - - - - - - "...., Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap Complete RIH, Washed down last two stands. Driil Float equipment, Ran centerfuges to cut mud weight. Displaced well to 9.1 ppg. Drilling shoe at report time. Held two safety huddle ups and pretour meetings. Logging Engineer: Reg Wilson I Mark Lindloff · 10000 units = 100% Gas In Air --,..._~ I I I I I I I I I I I I I I I I I I I spe.....,.....,v- sun [J R I L-L-I N G S E R V I J:: E S Customer: Well: Area: Lease: Rig: Job No.: Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 40 4/11/2004 21,985 o POOH Polya I Holt Mudlogger's Morning Report BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 '''~-,.,,~'''......." Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIhr @ ) Pump 1 0 spm DH flow gpm - Gas' 0 units 45 unit~ ( 128 units @ 21985 ) Pump 2 spm Total flow gpm - Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP fpm - Pump Pres -,,--- psi A V @ DC - fpm Mud Wt In Mud Wt Out Visc ~ secs API tilt 4.0 ml HTHP 0.0 Mud Wt at Max Gas _ ppg PV ~ YP ~ Ibs/1 00ft2 Gel~~ I ~I ~ Ibs/1 00ft2 pH ~ Sd ~ % 9.20 ppg 9.20 ppg .. Bit No.: 7 Type: STX30CDX Bit Size: 61/8 Jets: 15 X 15 X 15 X X x TFA: 0.5160 - - - Wt On Bit: RPM: 0 Hrs. On Bit: 0.3 Total Revs on Bit: 26 Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: 20000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft .",,' 60 % SH 10 % SLST 30 % SST % %LCM Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation ot Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24hrRecap Drilled through shoe and old hole to bottome where junk was encountered. Drilled on junk for a while wasn't able to drill past it. POOH, slip and cut drill line. UD BHA. Held two safety huddle ups and pretour meetings. Logging Engineer: Reg Wilson I Mark Lindloff * 10000 units = 100% Gas In Air I I Customer: BP Alaska Report No.: 41 Well: NorthStar NS 21 Date: 4/12/2004 spe.....,.....,v- sun Area: North Slope Depth 21,985 [JRILLING SERVIC:ES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: POOH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya / Holt . Shows: I I I Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftlhr ftIhr @ ) Pump 1 0 spm DH flow gpm - Gas' 0 units 55 unit~ ( 315 units @ 21985 ) Pump 2 spm Total flow gpm - Temp Out 75 Deg F ( deg F @ ) Pump 3 spm AV @ DP fpm - Pump Pres ~ psi AV @ DC - fpm I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc ....£.. secs API tilt 4.5 ml HTHP 0.0 Mud Wt at Max Gas _ppg PV...!... YP ~lbs/100ft2 Gel~~ I ~I ~lbs/100ft2 pH ~Sd --E- % Bit No.: BHA19 Type: Baker Bit Size: 61/8 Jets: 16x3:X X X X x TFA: 12.5600 - - - - - Wt On Bit: 27 RPM: 67 Hrs. On Bit: 0.0 Total Revs on Bit: 7 Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 24000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft mw e:n OL SH 10 % SLST 30 % SST % %LCM -<::J" - Connection Gas and Mud Cut ft units ppg ft units -ppg - - - ft units ppg ft units -ppg - - - ft units ppg ft units ppg - - - - Drilling Breaks ft ft ft - units units units - ppg ppg ppg - - - - before Drill Rate during after before Gas during after % Lithology Sst Sltst Sh - - - - - - - - - - - - - - - - ill Ibs Rig 0 Depth to to to to 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 ",- 24 hr Recap RIH, Circulate @ shoe, Run to bottom and wash over fish. CBU, Max TG 315 units.Worked Fishing tool down, POOH at report time. Held two safety huddle ups and pretour meetings. Logging Engineer: Reg Wilson I Mark Lindloff * 10000 units = 100% Gas In Air . I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 42 4/13/2004 21,991 o RIH Polya 1 Dinger I I I spel"""l"""\{- sun I:J RILL I N G 5 e R v I c: e 5 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. fVhr fVhr fVhr @ ) Pump 1 0 spm DH flow gpm - Gas· 0 units 0 unit~ ( 0 units @ 0 ) Pump 2 spm Total flow gpm - Temp Out 75 Deg F ( degF@ ) Pump 3 spm AV @ DP fpm - Pump Pres .......---- psi AV @ DC - fpm I I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc PV 52 secs API filt 4.3 ml - 8 YP 20 Ibs/100ft2 Gels HTHP 0.0 Mud Wt at Max Gas _ppg 8 I 10 I 0 Ibs/100ft2 pH 8.8 Sd 0 % - - - - - - - Bit No.: BHA 20 Type: Milltooth Bit Size: 61/8 Jets: 15 X 15 X 15 X X x TFA: 0.5180 - - - WtOnBit: 0 RPM: 67 Hrs. On Bit: 0.0 Total Revs on Bit: 0 Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg TripCI: 29000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft Current Lithology: 60 % SH 10 % SLST 30 % SST % %LCM Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap: Finish POOH, Recovered 3 Ibs of junk, P/U BHA #20 and RIH with the same. Went to pretour meetings and weekly safety meeting. Logging Engineer: Reg Wilson I Mark Lindloff * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I spef"""f"""V- sun [J R I L..L.. I N G S E R V I c:: E S Customer: Well: Area: Lease: Rig: Job No.: Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 43 4/14/2004 21,994 o Testing BOP's Polya / Dinger BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Mudlogger's Morning Report " :.:"""~::::._~- , ---- R.O.P. Current o o 77 24 hr Avg 24 hr Max Pump and Flow Data ftIhr 1.5 ftIhr 5 ftIhr @ 21992.00 ) Pump 1 0 spm DH flow - gpm units 54 unit~ ( 691 units @ 21991.00 ) Pump 2 spm Total flow - gpm Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres -rr--- psi AV @ DC - fpm Gas' Temp Out Mud Wt In Mud Wt Out 9.20 ppg 9.20 ppg Visc ~ secs API filt 4.6 ml HTHP 0.0 Mud Wt at Max Gas _ ppg PV ~ YP ~ Ibs/1 00ft2 Gel~ 9 I 21 ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: BHA 20 Type: Wt On Bit: 0 RPM: Bit Size: Hrs. On Bit: x x TFA: --- Footage for Bit Run Jets: 15 X 15 X 15 X Total Revs on Bit: 12 61/8 1.5 Milltooth o 0.5180 7 Trip Depth: ft Trip Gas: 691 Mud Cut: ppg TripCI: 30000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: -ppg Short Trip CI: ppm Tight Spots: to to to Feet of Fill on Bottom: ft ,.... _> :>~_I. 1':(\ % SH 10 % SLST 30 % SST % %LCM Connection Gas and Mud Cut ft units ppg ft units -ppg ft units -ppg - - - - ft units ppg ft units -ppg ft units -ppg - - - - ft units ppg ft units ppg ft units -ppg - - - - - " Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap Finish RIN, Washed the last 2 stands. Tagged up without encountering any metal. CBU TG peaked at 691 units. Pumped dry job and POOH. Preping to test BOP's. 1/3 LB of metal in basket. Went to pretour meetings and weekly safety meeting. Logging Engineer: Reg Wilson I Mark Lindloff * 10000 units = 100% Gas In Air I I I I I Customer: BP Alaska Report No.: 44 Well: NorthStar NS 21 Date: 4/15/2004 spef""'f""'V- sun Area: North Slope Depth 21,994 CAI LL..I N G SEAVIC::ES Lease: NorthStar NS 21 Footage Last 24 hrs: 0 Rig: Nabors 33E Rig Activity: RIH Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya / Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIhr ftIhr ftIh r @ ) Pump 1 spm DH flow gpm - Gas' 0 units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out 77 Deg F ( deg F @ ) Pump 3 spm A V @ DP fpmi - Pump Pres -n-- psi A V @ DC - fpml Mud Wt In 9.20 ppg Visc 50 secs API filt 4.6 ml HTHP 0.0 Mud Wt at Max Gas ppg - - Mud Wt Out 9.20 ppg PV 8 YP 23 Ibs/100ft2 Gels 9 I 12 I 0 Ibs/100ft2 pH 8.9 Sd 0 % - - - - - - - Bit No.: 8 Type: XR30YD20DGP Bit Size: 61/8 Jets: 15 X 15 X 15 X X x TFA: 0.5160 - - - Wt On Bit: 0 RPM: 0 Hrs. On Bit: 0.0 Total Revs on Bit: 0 Footage for Bit Run 0 Trip Depth: ft Trip Gas: Mud Cut: ppg Trip CI: 30000 ppm - Short Trip Depth ft Short Trip Gas: Mud Cut: ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft '''' 01 SH 10 % SLST 30 0/0 SST % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg ft units ppg - - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg - - - - - - Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Sst Sltst Sh to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Test BOPE. RIH. Near bottom and breaking circulation at report time. Logging Engineer: Reg Wilson I Tom Mansfield * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I __;::-:,::,.~~::':~::::a;:J:j;':;',::',~ ¡ii JJlU! ~ 1mB J I [ ill .:: 11II Customer: BP Alaska Report No.: 45 Well: NorthStar NS 21 Date: 4/16/2004 spe............v-sun Area: North Slope Depth 22,261 [JRI LLI N G SERVICES Lease: NorthStar NS 21 Footage Last 24 hrs: 267 Rig: Nabors 33E Rig Activity: Circ. Out Mudlogger's Morning Report Job No.: AKAMOO02978821 Report For: Polya / Dinger Shows: Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. 0 ftIhr 28 ftlhr 133 ftIhr @ 22211 ) Pump 1 84 spm DH flow gpm - Gas' 110 units 150 unit~ ( 212 units @ 22130 ) Pump 2 spm Total flow 297 gpm Temp Out 77 Deg F ( deg F @ ) Pump 3 spm AV @ DP 123 fpm Pump Pres 1800 psi AV @ DC 435 fpm -rr--- - Mud Wt In 9.30 ppg Visc 51 secs API filt 4.8 ml HTHP 0.0 Mud Wt at Max Gas ppg - - Mud Wt Out 9.30 ppg PV 9 YP 25 Ibs/1 00ft2 Gels 11 I 13 I Ibs/100ft2 pH 8.6 Sd 0 % - - - - - - - Bit No.: 8 Type: XR30YD20DGP Bit Size: 61/8 Jets: 15 X 15 X 15 X X x TFA: 0.5160 - - - - - Wt On Bit: 30 RPM: 95 Hrs. On Bit: 9.6 Total Revs on Bit: 73.2K Footage for Bit Run 267 Trip Depth: 21994 ft Trip Gas: 217 Mud Cut: ~ppg Trip CI: ppm Short Trip Depth 22261 ft Short Trip Gas: 9960 Mud Cut: 1.7 ppg Short Trip CI: ppm - Tight Spots: to to to Feet of Fill on Bottom: ft '-'VII "'"' L.i'"UIUYY: 70 % CGL 10 % SLST 20 % SST % %LCM - - - - Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units ppg ft units ppg " Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Cgl Sltst Sst 22125 to 22261 35 90 na 68 212 na 70 10 20 - - - - to - - - - to - - - - to - - - - ~.~" 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Ibs Description of fillings: Assorted G&I 0 Drag Chain 0 Rig 0 24 hr Recap: Finished RIH. Trip gas of 217 units. Drilled ahead to 22005' and FIT to 11.5 ppg EMW. Drill to TD at 22261' MD, 11207' TVD. Circulated four OH vols. Mad passed to shoe. RIH, Circulated 100 bbls of mud to clean open hole. POH to space PBl at top of 7" liner. POOH from 22261' to 21242', hole fill off. Monitor well. RIH to bottom and pump 1000 strokes. Pump out of hole to 21917' at 84 spm. CBU at 84 spm with a max gas of 9984 units. Circulating at report time. SHUBLIK @ 21994' MD, 10949' TVD. IVISHAK @ 22125' MD, 11075' TVD. logging Engineer: Reg Wilson I Tom Mansfield * 10000 units = 100% Gas In Air I I I I I I I I I I I I I I I I I I I I I I Mudlogger's Morning Report ...-....... Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 46 4/17/2004 22,261 o POOH Polya / Dinger spe.....,.....,v- sun ORI L.L.I N G 55ERVI t:E 55 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIh r ftIhr ftIh r @ ) Pump 1 spm DH flow - gpm Gas' units unit~ ( units @ ) Pump 2 spm Total flow - gpm Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres psi AV @ DC - fpm -rr-- I I I I Mud Wt In Mud Wt Out 9.60 ppg 9.60 ppg Vise PV ~ sees API filt 5.8 ml HTHP _ Mud Wt at Max Gas _ ppg ~ YP ~ Ibs/1 00ft2 Gel~~ I ~ I ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: 8 Type: XR30YD20DGP Bit Size: 61/8 Wt On Bit: 30 RPM: 95 Hrs. On Bit: 9.6 Trip Depth: ft Trip Gas: Short Trip Depth 22261 ft Short Trip Gas: 503 Tight Spots: to to Jets: ~X~X 15 X_X_x_ TFA: 0.5160 Total Revs on Bit: 73.2K Footage for Bit Run 267 I I I I I Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: Feet of Fill on Bottom: ppm ppm ft - Current Lithology: 70 % CGL 10 % SLST 20 % SST % %LCM Connection Gas and Mud Cut ft units ppg ft units ppg - - - - ft units ppg ft units ppg - - - - ft units ppg ft units ppg - - - - .. Drilling Breaks before Drill Rate during after before Gas during ft units ppg - - ft units ppg - - ft units ppg - - : % Lithology after Cgl Sltst Sst - - - - - - - - - - - - - - - - Depth to to to to I I I I I 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o "_u..,~~ __, 24hrRecap Finished circulating out gas (maximum of 9984 units). RIH to bottom at 22261'. Pumped out of hole to 21917' with 70 spm. Increased mud weight to 9.6 ppg while circulating at 84 spm and a rotary of 50 rpm with a maximum gas of 503 units at bottoms up. RIH to bottom and circulated 1000 strokes. Pumped out of hole to 21917'. Circulated bottoms up with a maximum gas of 192 units. Monitored the well, static. Continue pumping out of the hole at 50 spm. Logging Engineer: Reg Wilson I Tom Mansfield · 10000 units = 100% Gas In Air I I I I I Mudlogger's Morning Report Customer: Well: Area: Lease: Rig: Job No.: BP Alaska NorthStar NS 21 North Slope NorthStar NS 21 Nabors 33E AKAM0002978821 Report No.: Date: Depth Footage Last 24 hrs: Rig Activity: Report For: Shows: 47 4/18/2004 22,261 o Run 4 1/2" liner Polya I Dinger spe............v- sun C A I L..L..I N G 5 E A V I c:: E 5 Current 24 hr Avg 24 hr Max Pump and Flow Data R.O.P. ftIhr ftIhr ftIh r @ ) Pump 1 spm DH flow gpm - Gas· units unit~ ( units @ ) Pump 2 spm Total flow gpm - Temp Out Deg F ( degF@ ) Pump 3 spm AV @ DP - fpm Pump Pres -.r--- psi A V @ DC - fpm I I I I I I I I I I I I I Mud Wt In Mud Wt Out 9.60 ppg 9.60 ppg Visc ~secs APlfilt 6.6 ml HTHP _ Mud Wtat Max Gas _ppg PV....!.....- YP ~ Ibs/1 00ft2 Gel~~ I .1..!...1 ~ Ibs/1 00ft2 pH ~ Sd ~ % Bit No.: Wt On Bit: Type: RPM: Bit Size: Hrs. On Bit: Jets: X X X --- Total Revs on Bit: X x TFA: --- Footage for Bit Run to to Mud Cut: Mud Cut: to - ppg Trip CI: ppg Short Trip CI: Feet of Fill on Bottom: ppm ppm ft Trip Depth: Short Trip Depth Tight Spots: ft ft Trip Gas: Short Trip Gas: - Current Lithology: % % % % %LCM Connection Gas and Mud Cut ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ft units ppg ft units -ppg ft units ppg - - - - - ,. Drilling Breaks Depth Drill Rate Gas % Lithology before during after before during after Cgl Sltst Sst to - - - - to - - - - to - - - - to - - - - 24 hour accumulation of Steel Filings from Possum Belly & G&I Magnets: Description of fillings: Assorted G&I 0 Drag Chain 0 Ibs Rig o 24 hr Recap: Continued pumping out of hole with 57/8" DP. POOH with 5" DP. UD 4" DP and BHA. RIH w/4 1/2" liner. Logging Engineer: Reg Wilson I Tom Mansfield · 10000 units = 100% Gas In Air I Ive, 9·02 .Scblumberger Job # 40008206 Customer BP ADW Well NS21 Field Northstar Rig Nabors 33E AFE # NSD-831314 DD's Rinke I Robertson Co. Men Polya I Clump PDMRun# 1 PDM Ser# 962-1126 . PDM Size 9 9/16 Mud Type Sea H20 Spud BHT F Date In 16-Nov-02 Time In 12:00 Depth In 201 TVD In 201 Drlg Hrs 0.5 Slide Hrs 0.1 Rot Hrs 0.4 Pump Hrs 0.9 PDM Jet Blk Bearing Mud Rubber RM 1 OOD Sand % 1 Solids % 3 R/S 5/6 Stages 4.0 Rev/Gal 0.113 Mud Wt 8.7 Mud Vis 150 BHA# Date Out 16-Nov-02 Time Out 17:00 Depth Out 330 TVD Out 330 Drlg Ft 129 Slide Ft 24 Rot Ft 105 Rotate % 81 Inclln Incl Out Avg Dls RPM 30 DIg TQ 2.0 Azln Az Out Max Ds GPM 480 WOB 5 1 Hole Size 16 Hole Sect Surface Bha Type Steerable Hrs BRT 5.00 Avg ROP 258.00 Slide ROP 240.00 Rot ROP 262.50 Slide % 19 BibSrvy 40.00 T/FCorr N/A Plan Dls SPP On 400 SPP Off 350 Bit#1 MX-C1 TFA=1.031 7 5/8 Reg P 2 9 5/8 Std PDM 1.83° Ana 962-1126 9 9/16 15 7/8 1.06 7 5/8 Reg B 26.03 27.38 Float 6 5/8 H-90 B 3 Orienting Sub Ana GLDD-105 8 2 3/4 6 5/8 H-90 P 1.46 28.84 'mule shoe 6 5/8 H-90 B 4 MONEL STAB Ana HA-016 8 2 7/8 15 7/8 2.35 6 5/8 H-90 P 5.60 34.44 6 5/8 H-90 B 5 MONEL LC Ana 10-HA-013 8 1/8 2 13/16 6 518 H-90 P 9.96 44.40 6 5/8 H-90 B MONEL LC Ana 10-HA-011 8 2 13/1 6 6 518 H-90 P 9.69 54.09 6 5/8 H-90 B MONEL STAB Ana HA-012 8 2 7/8 15 7/8 2.12 6 5/8 H-90 P 5.25 59.34 6 5/8 H-90 B X-OVER Ana ANA614 7x8 2 7/8 1.20 6 5/8 H-90 P 3.09 62.43 4 1/2 IF B Clean out conductor and survey BHL expected Dry Wt Buoyed Wt Incl Angle Buoy+lncl Wt lil.íl,.I~.II[.il Pickup directional Bha 10,934 9,485 1 9,484 IADC# 115 Footage 129 Hrs 0.5 k Revs 2 k Grade Not graded Comment Motor Jars Bit #1 34.3 35.2 0.5 0.5 0.9 Customer: BP EXPLORATION ALASKA Casing Program 20 inch at 201 ft sperry-sun Well: NS25 133/8" inch at 4621 ft Area: BEAUFORT SEA,ALASKA 9 5/8" inch at 20207 ft DRilLING SERVICES Lease: NORTHST AR 7" inch at ft Rig: NABORS DRLG RIG 33E 41/2" inch at ft Bit Record Mud Company: BAROI D inch at ft Job No.: AK-AM 0002822633 BHA# Bit Bit Serial Size TFA Depth Depth Feet Hours ROP RPM KREV Slide No. Type Number In Out ft/h r % GRADE 1 01 Hughes MXC1 6004905 16.00 1.031 201 330 129 0.6 215 50 004k 19 2 02 Hughes MXC1 6004906 16.00 1.031 330 4621 4291 25.8 149 35 176k 45 1-1-WT-A-E-I-NO-TD 3 03 Hycalog RSX238HFGS 205370 12.25 0.994 4621 16019 11 398 81.2 140 140 731K 0-1-CT-T-X-I-LM-CM 4 04 Hycalog RSX238HFG 205757 12.25 0.994 16019 20227 4208 39.6 106 140 285K O-O-NO-A-X-I-NO-TD 5 05 Hughes HCM605 7104182 8.5/9.5 0.552 20227 21985 1758 35.7 49 150 300K O-O-NO-A-X-I-NO-TD 20 07 CONCAVE MILL MILL 6.13 OPEN 21985 21993 8 1.0 8 21 08 STC XR30YD20DGR MN3504 6.13 0.516 21993 22261 268 9.6 28 100 81K 26 2-2-BT -A-E-I-WT- TD m¡¡¡¡¡mmmmm¡¡¡¡¡ ------------------- Customer: BP ALASKA Well: NORTHST AR NS21 Area: BEAUFORT SEA, ALASKA Lease: NORTHST AR Rig: NABORS DRILLING RIG 33E Mud Company: BAROID DRILLING FLUIDS Job No.: AK-AM-0002978821 Casing Program 20" inch at 201 ft 13.375" inch at 4605 ft 9.625" inch at 20207 ft 7" inch at 21945 ~ 4.5" inch at inch at ft sperry-sun DRILLING SERVICES Waterbase Mud Record Depth Date ft 04/09/04 21985 04/1 0/04 21895 04/11/04 21985 04/12/04 21985 04/13/04 21991 04/14/04 21994 04/15/04 21994 04/16/04 22261 04/17/04 22261 04/18/04 22261 1¡li III1 MW Vis PV YP Gels Fltr HTHP Cake Sol Oil Water Sd CEC pH Pm Ib/gal see LB/100 1 0S/1 OM ml/30 ml@deg F 32's % % % % mgelhg 12.3 52 20 25 6/1 0/13 3.6 1 19.0 5.0 76.00 0.00 56.5 8.7 0.10 9.1 45 9 21 6m8 4.4 1 5.7 3.5 90.80 0.00 0.3 9.5 0.60 9.2 56 9 19 8/1 010 4.0 1 6.5 3.5 90.00 0.00 0.3 8.5 0.20 9.2 47 8 18 619/1 0 4.5 1 6.5 3.5 90.00 0.00 0.3 9.0 0.60 9.2 52 8 20 8/1 0/0 4.3 1 6.4 3.0 90.60 0.00 0.3 8.8 0.35 9.2 50 8 23 9/12/0 4.6 1 6.5 3.0 90.50 0.00 0.3 8.9 0.20 9.2 51 8 22 9/11/0 4.5 1 6.5 3.0 90.50 0.00 0.3 8.7 0.05 9.3 51 9 25 11/13/0 4.8 1 7.0 3.0 90.00 0.00 0.5 8.6 0.10 9.6 46 8 22 10/12/14 5.8 1 9.3 2.5 88.20 0.00 0.3 8.5 0.05 9.6 46 7 23 10/11/13 6.6 1 9.3 2.5 88.20 0.00 0.3 8.8 0.10 #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### #### - - - Pf I Mf 0.05/1.70 0.05/0.35 0.05/0.50 0.30/1.60 0.30/1.50 0.10/1.50 0.03/1.30 0.0511.60 0.02/1.50 0.05/1.30 Chlorides Calcium Comments ppm ppm 48000 880 RIH W/BHA 18 18000 1200 Drill Out Cmnt 20000 380 POOH 24000 480 POOH 29000 340 RIH W/BHA 20 30000 340 Test BOP's 30000 320 RIH 30000 420 Cire. @ TD 26500 540 POOH 28000 420 Run 4.5" liner - - - - - - - - - - - - - - - - I I Schlumberger NS21 Final Surveys Report Date: Apn116,2004 Survey I DLS Computation Method: Minimum Curvature 1 Lubinski Client: BP Exploration Alaska Vertical Section Azimuth: 309.860' Field: Northstar Vertical Section Origin: N 0.000 It, E 0.000 It Structure I Slot: Northstar PF 1 NS21 TVD Reference Datum: KB Well: NS21 TVD Reference Elevation: 56.2 It relative to MSL Borehole: NS21 Sea Bed I Ground Level Elevation: 15.670 ft reiative to MSL UWUAPIII: 500292312600 Magnetic Declination: 25.973' Survey Name I Date: NS21 current 1 June 10, 2003 Total Field Strength: 57562.246 nT ! Tort I AHD I DDII ERD ratio: 219.985' 117653.12 1t/6.889/1.588 Magnetic Dip: 80.971' Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: December 20, 2002 Location LatILong: N 70 29 28.666, W 148 41 35.919 Magnetic Declination Model: BGGM 2003 Location Grid NÆ YIX: N 6031021.480 /tUS, E 659827.320 /tUS North Reference: True North Grid Convergence Angle: +1.23169690' Total Corr Mag North -> True North: +25.973' Grid Scale Factor: 0.99992902 Local Coordinates Referenced To: Well Head . ~~,~ Measured I Inclination I Azimuth I TVD Vertical I NS EW I DLS I Tool Face I Comments Model Depth Section (II) (deg) (deg) (II) (II) (It) (It) ( deg/100 II ) (deg) P _UNKNOWN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 -107.81M Tie-In BP _GYO CT OMS 50.00 0.58 252.19 50.00 0.14 -0.08 -0.24 1.16 -99.96M BP _GYO CT OMS 100.00 0.95 260.04 99.99 0.54 -0.23 -0.89 0.77 -93.49M IP _GYO CT OMS 150.00 1.65 266.51 149.98 1.33 -0.34 -2.02 1.43 -79.42M P _GYO CT OMS 200.00 1.76 280.58 199.96 2.52 -0.24 -3.49 0.86 -64.75M BP _GYO CT OMS 250.00 1.97 295.25 249.93 4.02 0.26 -5.02 1.04 -63.15M IP GYO CT OMS 300.00 2.01 296.85 299.90 5.71 1.03 -6.58 0.14 -57. 14M P _GYO CT OMS 350.00 2.13 302.86 349.87 7.49 1.93 -8.14 0.50 -51.04M P _GYO CT OMS 400.00 2.12 308.96 399.84 9.33 3.01 -9.64 0.45 -38.06M BP _GYO CT OMS 450.00 2.24 321.94 449.80 11.21 4.36 -10.97 1.01 -25.22M IP _GYO CT OMS 500.00 2.06 334.78 499.77 12.98 5.94 -11.95 1.03 -25.15M P GYO CT OMS 550.00 2.88 334.85 549.72 14.94 7.89 -12.87 1.64 -24.28M , P =GYO CT OMS 600.00 3.84 335.72 599.63 17.58 10.56 -14.09 1.92 -24.77M tBP _GYO CT OMS 650.00 4.36 335.23 649.50 20.81 13.81 -15.57 1.04 -23.74M IP _GYO CT OMS 700.00 4.64 336.26 699.35 24.34 17.39 -17.19 0.58 -23.78M P~GYO CT OMS 750.00 5.00 336.22 749.17 28.10 21.23 -18.88 0.72 -28.88M BP _GYO CT OMS 840.00 6.50 331.12 838.72 36.36 29.28 -22.92 1.76 -38.32G ,BP _GYO CT OMS 930.00 8.32 321.74 927.97 47.48 38.86 -29.41 2.42 -11.85G IP _GYO CT OMS 1020.00 10.36 319.37 1016.77 61.84 50.11 -38.72 2.31 3.64G P _GYO CT OMS 1117.00 13.34 320.19 1111.69 81.45 65.33 -51.56 3.08 31.55G BP _GYO CT OMS 1209.00 14.95 323.95 1200.90 103.41 83.08 -65.34 2.01 47.17G _P _GYO CT OMS 1303.00 16.05 328.09 1291.48 127.51 103.92 -79.35 1.66 -18.37G P GYO CT OMS 1397.00 19.55 324.65 1380.97 155.07 127.78 -95.32 3.89 -9.41G P _MWO+IFR:AK 1489.08 21.77 323.66 1467.12 186.55 154.11 -114.36 2.44 -13.37G BP _MWO+IFR:AK 1584.38 23.43 322.67 1555.10 222.19 183.41 -136.32 1.79 -21.36G IP _MWO+IFR:AK 1679.94 25.61 320.71 1642.04 261.00 214.50 -160.92 2.43 -17.72G P _MWO+IFR:AK 1773.48 28.13 319.01 1725.48 302.64 246.80 -188.19 2.82 9.85G P _MWO+IFR:AK 1866.86 30.98 319.97 1806.70 348.04 281.83 -218.10 3.09 151.58G BP _MWO+IFR:AK 1958.74 30.42 320.57 1885.70 394.18 317.90 -248.08 0.69 -5.86G _P _MWO+IFR:AK 2054.35 32.91 320.10 1967.07 443.53 356.53 -280.12 2.62 -7.25G P _MWO+IFR:AK 2149.08 35.37 319.56 2045.47 495.89 397.14 -314.42 2.62 -45.13G ~BP._MWO+IFR:AK 2241.71 37.30 316.43 2120.09 550.20 437.89 -351.16 2.89 -23.44G fap _MWO+IFR:AK 2337.72 40.94 314.04 2194.57 610.50 480.85 -393.84 4.10 7.70G IP _MWO+IFR:AK 2430.93 43.38 314.52 2263.66 672.87 524.53 -438.62 2.64 11.10G P _MWO+IFR:AK 2523.81 45.68 315.15 2329.87 737.75 570.46 -484.80 2.52 -17.09G BP,--MWO+IFR:AK 2617.72 48.72 313.91 2393.67 806.42 618.76 -533.93 3.38 1.28G _P _MWO+IFR:AK 2713.32 52.26 314.01 2454.48 879.98 669.95 -587.01 3.70 -16.26G P _MWO+IFR:AK 2807.17 55.37 312.91 2509.89 955.56 722.04 -641.99 3.45 -7.02G P _MWO+IFR:AK 2902.71 57.99 312.53 2562.36 1035.29 776.19 -700.64 2.76 -15.75G BP _MWO+IFR:AK 2995.62 60.94 311.58 2609.56 1115.25 829.78 -760.06 3.29 -35.64G IP _MWO+IFR:AK 3090.26 63.71 309.38 2653.52 1199.04 884.16 -823.81 3.58 -12.14G I OOToolBox Ver 3.1 RT-SP3.03-HF1.2 Bld( d031 rI-546 ) \\\NS21 current Generated 4/27/2004 3:21 PM Page 1 of 5 I , Survey Tool Measured I Inclination I Azimuth I TVD Vertical I NS EW I DLS I Tool Face I Comments Model Depth Section (II) (deg) (deg) (II) (II) (II) (II) ( deg/100 II ) (deg) ';BP _MWD+IFR:AK 3186.48 66.57 308.71 2693.97 1286.33 939.15 -891.61 3.04 30.22G IP:...MWD+IFR:AK 3282.46 67.78 309.47 2731.20 1374.78 994.93 -960.27 1.46 156.42G P _MWD+IFR:AK 3377.60 65.51 310.56 2768.91 1462.12 1051.08 -1027.17 2.61 -128.95G P _MWD+IFR:AK 3473.84 65.29 310.26 2808.98 1549.62 1107.81 -1093.80 0.36 27.71G _P _MWD+IFR:AK 3568.11 67.62 311.58 2846.63 1636.02 1164.41 -1159.09 2.79 14.58G P _MWD+IFR:AK 3662.20 69.86 312.20 2880.75 1723.64 1222.96 -1224.35 2.46 117.51G P _MWD+IFR:AK 3756.63 68.98 314.03 2913.94 1811.90 1283.37 -1288.89 2.04 178.50G BP _MWD+IFR:AK 3852.41 67.22 314.08 2949.67 1900.53 1345.17 -1352.75 1.84 -19.14G BP _MWD+IFR:AK 3947.76 69.38 313.28 2984.92 1988.92 1406.34 -1416.82 2.40 -27.22G :Ip _MWD+IFR:AK 4043.13 70.13 312.87 3017.92 2078.25 1467.45 -1482.18 0.88 48.99G P _MWD+IFR:AK 4138.06 70.88 313.78 3049.60 2167.57 1528.85 -1547.28 1.20 -74.28G BP _MWD+IFR:AK 4232.58 71.33 312.12 3080.21 2256.87 1589.78 -1612.73 1.73 179.53G _P _MWo,IFR,AK 4330.18 70.19 312.13 3112.38 2348.94 1651.59 -1681.08 1.17 152.48G P _MWD+IFR:AK 4425.25 69.40 312.57 3145.21 2438.08 1711.69 -1747.01 0.94 161.84G P _MWD+IFR:AK 4520.31 69.03 312.70 3178.94 2526.85 1771.89 -1812.40 0.41 97.34G BP _MWD+IFR:AK 4552.11 68.93 313.55 3190.35 2556.48 1792.18 -1834.06 2.51 110.54G IP_MWD+IFR:AK 4674.52 68.55 314.65 3234.74 2670.25 1871.56 -1915.98 0.89 -114.71G P _MWD+IFR:AK 4770.87 68.32 314.11 3270.15 2759.57 1934.24 -1980.03 0.57 -149.65G P _MWD+IFR:AK 4866.20 67.72 313.73 3305.83 2847.75 1995.56 -2043.70 0.73 -101.22G _P -"WD.IFRAJ{ 4960.57 67.62 313.18 3341.69 2934.87 2055.59 -2107.07 0.55 -83.65G P _MWD+IFR:AK 5056.90 67.70 312.42 3378.30 3023.85 2116.13 -2172.44 0.73 -15.99G 'p _MWD+IFR:AK 5150.32 68.61 312.14 3413.06 3110.49 2174.47 -2236.60 1.01 27.87G P _MWD+IFR:AK 5247.03 68.91 312.31 3448.10 3200.55 2235.05 -2303.35 0.35 -90.00G BP _MWD+IFR:AK 5342.42 68.91 311.65 3482.42 3289.49 2294.57 -2369.51 0.65 -148.14G Ip_MWD+IFR:AK 5436.92 68.82 311.59 3516.50 3377.59 2353.12 -2435.40 0.11 -114.53G P _MWD+IFR:AK 5531.98 68.68 311.26 3550.95 3466.15 2411.74 -2501.83 0.36 -107.31G BP _MWD+IFR:AK 5626.30 68.53 310.74 3585.36 3553.96 2469.35 -2568.11 0.54 -91.69G _P _MWo,IFR,AK 5720.57 68.51 309.94 3619.88 3641.68 2526.14 -2634.97 0.79 -78.47G P _MWD+IFR:AK 5815.91 68.66 309.16 3654.69 3730.43 2582.65 -2703.41 0.78 -78.19G P _MWD+IFR:AK 5911.42 68.79 308.50 3689.35 3819.42 2638.46 -2772.74 0.66 -120.38G BP _MWD+IFR:AK 6005.99 68.67 308.28 3723.65 3907.52 2693.18 -2841.82 0.25 -99.92G IP _MWD+IFR:AK 6102.53 68.49 307.15 3758.91 3997.32 2748.16 -2912.91 1.11 -158.29G P _MWD+IFR:AK 6198.72 68.28 307.06 3794.34 4086.65 2802.11 -2984.23 0.24 -33.68G P _MWD+IFR:AK 6292.02 68.77 306.71 3828.50 4173.35 2854.22 -3053.68 0.63 -15.10G _P _MWD.IFR,^" 6387.14 69.29 306.56 3862.54 4262.03 2907.22 -3124.95 0.57 -82.06G P _MWD+IFR:AK 6482.64 69.34 306.18 3896.27 4351.21 2960.20 -3196.89 0.38 63.77G P _MWD+IFR:AK 6578.20 69.40 306.31 3929.94 4440.46 3013.08 -3269.02 0.14 -151.41G P _MWD+IFR:AK 6674.19 69.16 306.17 3963.90 4530.06 3066.15 -3341 .43 0.28 97.09G BP _MWD+IFR:AK 6769.64 69.13 306.43 3997.89 4619.09 3118.96 -3413.32 0.26 108.25G Ip _MWD+IFR:AK 6864.73 68.91 307.15 4031.93 4707.75 3172.13 -3484.42 0.74 118.74G P_MWD+IFR:AK 6960.54 68.63 307.70 4066.63 4796.97 3226.40 -3555.34 0.61 122.89G BP _MWD+IFR:AK 7055.57 68.39 308.10 4101.44 4885.35 3280.72 -3625.12 0.47 102.62G _P _MWo,IFR'AK 7149.83 68.25 308.78 4136.26 4972.91 3335.18 -3693.72 0.69 118.93G P _MWD+IFR:AK 7244.67 68.02 309.23 4171.58 5060.92 3390.57 -3762.12 0.50 120.93G P _MWD+IFR:AK 7338.28 67.76 309.70 4206.82 5147.64 3445.70 -3829.07 0.54 108.45G BP _MWD+IFR:AK 7432.10 67.57 310.32 4242.47 5234.42 3501.49 -3895.54 0.64 129.94G IP _MWD+IFR:AK 7526.48 67.07 310.97 4278.86 5321.49 3558.21 -3961.62 0.83 75.92G P _MWD+IFR:AK 7620.28 67.17 311.40 4315.33 5407.89 3615.12 -4026.65 0.44 53.71G P _MWD+IFR:AK 7713.79 67.36 311.68 4351.47 5494.10 3672.31 -4091.21 0.34 -18.92G _P -"wo.IFR,AJ{ 7807.06 68.72 311.18 4386.35 5580.57 3729.55 -4156.06 1.54 44.77G P _MWD+IFR:AK 7901.15 69.42 311.92 4419.96 5668.41 3787.84 -4221.83 1.05 108.63G P _MWD+IFR:AK 7995.84 69.26 312.43 4453.37 5756.94 3847.32 -4287.49 0.53 -116.81G P _MWD+IFR:AK 8091.65 68.95 311.77 4487.54 5846.38 3907.33 -4353.90 0.72 -112.45G BP _MWD+IFR:AK 8185.16 68.85 311.51 4521.20 5933.57 3965.30 -4419.10 0.28 -73.34G Ip _MWD+IFR:AK 8280.01 68.92 311.26 4555.37 6022.02 4023.79 -4485.49 0.26 10.16G P _MWD+IFR:AK 8375.40 69.39 311.35 4589.32 6111.14 4082.64 -4552.46 0.50 -54.61G BP ~MWD+IFR:AK 8469.55 69.59 311.05 4622.30 6199.30 4140.72 -4618.80 0.37 77.17G _P _MWD+IFR:AK 8563.36 69.65 311.33 4654.97 6287.21 4198.63 -4684.98 0.29 -47.29G I DDToolBox Ver 3.1 RT-SP3.03-HF1.2 Bld( d031 rt-546 ) \\\NS21 current Generated 4/27/2004 3:21 PM Page 2 of 5 I , Survey Tool Measured I Inclination I Azimuth I TVD Vertical I NS EW I DLS I Tool Face I Comments Model Depth Section (It) (deg) (deg) (It) (It) (It) (It) (deg/100 It) (deg) BP _MWD+IFR:AK 8657.37 69.78 311.18 4687.56 6375.37 4256.78 -4751.27 0.20 -74.09G Ip _MWD+IFR:AK 8751.63 69.92 310.66 4720.04 6463.84 4314.74 -4818.14 0.54 -67.86G P _MWD+IFR:AK 8846.01 70.17 310.01 4752.25 6552.55 4372.16 -4885.76 0.70 -73.62G BP _MWD+IFR:AK 8939.81 70.27 309.65 4783.99 6640.82 4428.70 -4953.54 0.38 77.42G IP _MWD+IFR:AK 9034.50 70.31 309.84 4815.92 6729.96 4485.69 -5022.09 0.19 -63.60G P _MWD+IFR:AK 9128.76 70.46 309.52 4847.57 6818.75 4542.38 -5090.42 0.36 16.44G BP _MWD+IFR:AK 9224.15 70.78 309.62 4879.22 6908.73 4599.71 -5159.79 0.35 -151.32G BP _MWD+IFR:AK 9319.06 70.47 309.44 4910.71 6998.27 4656.69 -5228.84 0.37 114.58G IP _MWD+IFR:AK 9412.39 70.20 310.07 4942.11 7086.15 4712.90 -5296.41 0.70 -149.27G P _MWD+IFR:AK 9506.09 69.90 309.88 4974.09 7174.23 4769.48 -5363.90 0.37 -174.65G P _MWD+IFR:AK 9599.74 69.60 309.85 5006.50 7262.09 4825.80 -5431.34 0.32 -134.10G ,P _MWD+IFR:AK 9693.49 69.22 309.43 5039.47 7349.85 4881.79 -5498.93 0.58 145.61G P _MWD+IFR:AK 9786.68 69.07 309.54 5072.64 7436.93 4937.16 -5566.14 0.20 -177.12G P _MWD+IFR:AK 9880.19 68.70 309.52 5106.33 7524.16 4992.68 -5633.42 0.40 153.40G BP _MWD+IFR:AK 9974.01 68.44 309.66 5140.61 7611.50 5048.34 -5700.72 0.31 141.07G BP _MWD+IFR:AK 10068.45 68.13 309.93 5175.55 7699.23 5104.50 -5768.13 0.42 -99.12G Ip ~MWD+IFR:AK 10162.54 68.09 309.66 5210.63 7786.54 5160.38 -5835.21 0.27 -119.40G P _MWD+IFR:AK 10255.25 67.97 309.43 5245.32 7872.52 5215.12 -5901.51 0.26 -87.77G BP _MWD+IFR:AK 10349.03 67.99 308.90 5280.48 7959.45 5270.02 -5968.92 0.52 41.82G fP _MWD+IFR:AK 10444.13 68.71 309.59 5315.56 8047.83 5325.94 -6037.37 1.01 30.34G P _MWD+IFR:AK 10539.08 69.35 309.99 5349.54 8136.49 5382.68 -6105.50 0.78 -22.95G BP _MWD+IFR:AK 10632.93 69.66 309.85 5382.40 8224.40 5439.10 -6172.92 0.36 132.46G BP _MWD+IFR:AK 10728.69 69.60 309.92 5415.73 8314.17 5496.66 -6241.80 0.09 -173.53G IP _MWD+IFR:AK 10822.41 68.86 309.83 5448.97 8401.80 5552.84 -6309.05 0.79 -148.25G P _MWD+IFR:AK 10917.90 68.26 309.43 5483.87 8490.68 5609.53 -6377.51 0.74 150.18G P _MWD+IFR:AK 11013.63 67.84 309.69 5519.66 8579.47 5666.08 -6445.96 0.51 152.97G _P _MWD+IFR:AK 11108.15 67.46 309.90 5555.60 8666.89 5722.04 -6513.13 0.45 76.39G P _MWD+IFR:AK 11203.53 67.55 310.30 5592.09 8755.01 5778.80 -6580.53 0.40 6.22G P ~MWD+IFR:AK 11299.82 67.72 310.32 5628.73 8844.06 5836.40 -6648.44 0.18 37.71G BP _MWD+IFR:AK 11393.83 68.02 310.57 5664.15 8931.14 5892.90 -6714.71 0.40 18.91G BP _MWD+IFR:AK 11488.61 68.40 310.71 5699.33 9019.14 5950.22 -6781.49 0.42 -70.33G Ip _MWD+IFR:AK 11583.94 68.48 310.47 5734.36 9107.79 6007.90 -6848.82 0.25 30.69G P_MWD+IFR:AK 11679.15 68.81 310.68 5769.03 9196.46 6065.58 -6916.17 0.40 -84.87G 8P _MWD+IFR:AK 11773.94 68.85 310.21 5803.26 9284.84 6122.92 -6983.44 0.46 9.77G IP _MWD+IFR:AK 11868.70 69.23 310.28 5837.16 9373.33 6180.09 -7050.98 0.41 -64.56G P _MWD+IFR:AK 11963.82 69.44 309.81 5870.73 9462.33 6237.35 -7119.12 0.51 -68.91G BP _MWD+IFR:AK 12058.07 69.68 309.15 5903.64 9550.64 6293.50 -7187.28 0.70 70.46G BP _MWD+IFR:AK 12154.03 69.73 309.30 5936.93 9640.64 6350.42 -7257.01 0.16 -100.78G IP _MWD+IFR:AK 12250.15 69.61 308.62 5970.32 9730.76 6407.09 -7327.09 0.68 -107.03G P _MWD+IFR:AK 12345.85 69.49 308.20 6003.76 9820.40 6462.80 -7397.35 0.43 88.20G P _MWD+IFR:AK 12439.74 69.50 308.53 6036.65 9908.31 6517.38 -7466.31 0.33 -105.05G _P _MWD+IFR:AK 12533.28 69.36 307.97 6069.51 9995.85 6571.60 -7535.08 0.58 -116.23G P _MWD+IFR:AK 12629.54 69.19 307.60 6103.58 10085.83 6626.76 -7606.23 0.40 177.04G P _MWD+IFR:AK 12723.51 69.01 307.61 6137.10 10173.54 6680.33 -7675.78 0.19 -138.78G BP _MWD+IFR:AK 12818.16 68.67 307.29 6171.27 10261.73 6734.01 -7745.85 0.48 -126.26G BP _MWD+IFR:AK 12913.46 68.52 307.07 6206.05 10350.36 6787.63 -7816.55 0.27 114.50G Ip _MWD+IFR:AK 13008.02 68.41 307.33 6240.76 10438.23 6840.80 -7886.61 0.28 -102.23G P _MWD+IFR:AK 13101.85 68.32 306.88 6275.35 10525.35 6893.42 -7956.17 0.46 -150.90G BP_MWD+IFR:AK 13197.67 68.12 306.76 6310.91 10614.20 6946.75 -8027.40 0.24 85.14G _P _MWD+IFR:AK 13290.11 68.22 307.97 6345.28 10699.93 6998.83 -8095.60 1.22 -125.69G P _MWD+IFR:AK 13385.32 68.18 307.91 6380.64 10788.28 7053.18 -8165.32 0.07 78.67G BP _MWD+IFR:AK 13479.11 68.27 308.39 6415.43 10875.34 7106.98 -8233.81 0.48 64.13G 8P _MWD+IFR:AK 13575.04 68.46 308.81 6450.80 10964.49 7162.61 -8303.50 0.45 24.95G IP _MWD+IFR:AK 13667.99 68.52 308.84 6484.88 11050.95 7216.83 -8370.87 0.07 70.10G P _MWD+IFR:AK 13763.73 68.72 309.43 6519.78 11140.10 7273.10 -8440.02 0.61 43.00G P _MWD+IFR:AK 13860.27 68.78 309.49 6554.77 11230.07 7330.28 -8509.49 0.08 -104.18G _P _MWD+IFR:AK 13955.93 68.67 309.02 6589.48 11319.21 7386.69 -8578.51 0.47 60.94G I DDToolBox Ver 3.1 RT -SP3.03-HF1.2 Bld( d031 rt-546 ) \\\NS21 current Generated 4/27/2004 3:21 PM Page 3 of 5 I , Survey Tool Measured I Inclination I Azimuth I TVD Vertical I NS EW I DLS I Tool Face I Comments Model Depth Section (It) (deg) (deg) (It) (It) (It) (It) ( deg/100 It) (deg) BP _MWD+IFR:AK 14051.29 68.93 309.52 6623.97 11408.11 7442.96 -8647.34 0.56 -77.92G IP .::.MWD+IFR:AK 14148.54 68.95 309.42 6658.91 11498.86 7500.65 -8717.40 0.10 -35.02G P _MWD+IFR:AK 14241.54 69.11 309.30 6692.20 11585.70 7555.72 -8784.54 0.21 -55.82G P _MWD+IFR:AK 14337.11 69.32 308.97 6726.11 11675.04 7612.12 -8853.85 0.39 51.83G IP _MWD+IFR:AK 14431.78 69.63 309.39 6759.30 11763.69 7668.13 -8922.57 0.53 -113.17G P _MWD+IFR:AK 14526.20 69.51 309.09 6792.26 11852.17 7724.10 -8991.10 0.32 121.45G P _MWD+IFR:AK 14622.01 69.35 309.37 6825.93 11941.86 7780.83 -9060.59 0.32 -148.07G 'BP _MWD+IFR:AK 14716.97 69.23 309.29 6859.51 12030.68 7837.12 -9129.29 0.15 -176.44G BP _MWD+IFR:AK 14813.17 68.93 309.27 6893.86 12120.54 7894.02 -9198.85 0.31 -176.37G Ip _MWD+IFR:AK 14908.31 68.49 309.24 6928.40 12209.18 7950.11 -9267.49 0.46 113.12G P _MWD+IFR:AK 15004.15 68.32 309.67 6963.67 12298.29 8006.74 -9336.30 0.45 167.92G BP _MWD+IFR:AK 15098.65 68.06 309.73 6998.78 12386.03 8062.78 -9403.80 0.28 137.17G fP _MWD+IFR:AK 15193.87 68.00 309.79 7034.41 12474.33 8119.26 -9471.68 0.09 -78.99G P _MWD+IFR:AK 15291 .37 68.08 309.35 7070.87 12564.75 8176.86 -9541.39 0.43 -68.64G BP _MWD+IFR:AK 15384.96 68.16 309.13 7105.75 12651.60 8231.80 -9608.65 0.23 -86.62G BP _MWD+IFR:AK 15481.23 68.21 308.26 7141.52 12740.95 8287.67 -9678.41 0.84 -103.33G IP _MWD+IFR:AK 15576.00 68.09 307.71 7176.79 12828.87 8341.81 -9747.74 0.55 -90.00G P _MWD+IFR:AK 15673.27 68.09 307.22 7213.09 12919.04 8396.70 -9819.37 0.47 -93.72G P _MWD+IFR:AK 15768.12 68.06 306.71 7248.51 13006.91 8449.61 -9889.67 0.50 40.06G _P --"WD<IFR,AK 15864.44 68.27 306.90 7284.33 13096.19 8503.18 -9961.26 0.28 20.13G P _MWD+IFR:AK 15958.61 69.06 307.21 7318.59 13183.81 8556.03 -10031.26 0.89 -14.88G P ~MWD+IFR:AK 16008.85 69.66 307.04 7336.30 13230.77 8584.41 -10068.75 1.24 72.62G P _MWD+IFR:AK 16105.83 69.71 307.21 7369.97 13321.61 8639.30 -10141.26 0.17 -64.19G BP _MWD+IFR:AK 16202.91 69.81 306.99 7403.56 13412.59 8694.25 -10213.91 0.24 43.23G Ip _MWD+IFR:AK 16299.09 69.95 307.13 7436.64 13502.79 8748.67 -10285.98 0.20 -78.97G P _MWD+IFR:AK 16396.42 70.02 306.75 7469.95 13594.13 8803.63 -10359.07 0.37 126.95G 8P _MWD+IFR:AK 16493.25 69.90 306.92 7503.14 13684.97 8858.17 -10431.88 0.21 -169.08G _P_MWD+IFR:AK 16589.59 69.56 306.85 7536.51 13775.22 8912.41 -10504.16 0.36 145.66G P _MWD+IFR:AK 16686.85 69.30 307.04 7570.68 13866.16 8967.14 -10576.94 0.32 -153.14G BP _MWD+IFR:AK 16782.83 68.95 306.85 7604.88 13955.72 9021.04 -10648.61 0.41 -168.12G BP _MWD+IFR:AK 16879.40 68.64 306.78 7639.81 14045.63 9074.99 -10720.69 0.33 123.49G IP _MWD+IFR:AK 16977.34 68.37 307.22 7675.70 14136.64 9129.84 -10793.47 0.50 -91.19G P _MWD+IFR:AK 17072.94 68.36 306.65 7710.95 14225.39 9183.23 -10864.50 0.55 -113.93G P _MWD+IFR:AK 17169.61 68.29 306.48 7746.65 14315.07 9236.75 -10936.65 0.18 -125.68G _P _MWD+IFR:AK 17266.27 68.23 306.39 7782.46 14404.70 9290.08 -11008.88 0.11 81.04G P _MWD+IFR:AK 17362.86 68.31 306.93 7818.22 14494.29 9343.65 -11080.86 0.53 -91.04G P _MWD+IFR:AK 17459.64 68.30 306.26 7853.99 14584.06 9397.26 -11153.06 0.64 78.97G BP _MWD+IFR:AK 17556.20 68.34 306.48 7889.66 14673.63 9450.47 -11225.31 0.22 83.21G BP _MWD+IFR:AK 17652.26 68.36 306.66 7925.10 14762.76 9503.66 -11297.02 0.18 -76.08G Ip _MWD+IFR:AK 17749.04 68.39 306.53 7960.77 14852.59 9557.30 -11369.25 0.13 91.51G P_MWD+IFR:AK 17845.75 68.38 306.96 7996.40 14942.36 9611.09 -11441.29 0.41 -121.62G BP _MWD+IFR:AK 17942.70 68.30 306.82 8032.18 15032.34 9665.17 -11513.36 0.16 -84.17G _P _MWD+IFR:AK 18039.18 68.36 306.20 8067.81 15121.85 9718.52 -11585.42 0.60 125.79G P _MWD+IFR:AK 18135.48 67.98 306.77 8103.62 15211.09 9771.67 -11657.30 0.68 174.58G 8P_MWD+IFR:AK 18232.20 67.01 306.87 8140.64 15300.32 9825.22 -11728.83 1.01 169.17G i3P_MWD+IFR:AK 18328.99 65.96 307.09 8179.25 15388.96 9878.61 -11799.73 1.10 146.58G IP _MWD+IFR:AK 18425.49 64.77 307.96 8219.48 15476.60 9932.03 -11869.29 1.48 168.78G P _MWD+IFR:AK 18522.33 63.24 308.30 8261.92 15563.60 9985.78 -11937.76 1.61 162.18G P _MWD+IFR:AK 18619.42 61.68 308.87 8306.81 15649.66 1 0039.46 -12005.05 1.69 177.09G _P _MWD+IFR:AK 18716.29 60.48 308.94 8353.66 15734.44 10092.71 -12071.04 1.24 161.23G P _MWD+IFR:AK 18812.79 58.82 309.60 8402.41 15817.71 10145.42 -12135.50 1.82 170.18G P _MWD+IFR:AK 18909.73 57.17 309.94 8453.79 15899.91 10198.00 -12198.69 1.73 -173.94G BP _MWD+IFR:AK 19006.33 55.54 309.73 8507.31 15980.32 10249.51 -12260.44 1.70 177.28G BP _MWD+IFR:AK 19103.23 53.84 309.83 8563.32 16059.40 10300.11 -12321.20 1.76 169.54G Ip _MWD+IFR:AK 19200.70 52.13 310.23 8621.99 16137.22 10350.16 -12380.80 1.78 168.72G P _MWD+IFR:AK 19295.90 50.43 310.67 8681.54 16211.49 10398.34 -12437.32 1.82 -165.82G BP _MWD+IFR:AK 19393.61 49.32 310.30 8744.51 16286.20 10446.85 -12494.14 1.17 -160.75G _P _MWD+IFR:AK 19490.51 47.94 309.65 8808.55 16358.91 10493.57 -12549.86 1.51 -166.69G I DDToolBox Ver 3.1 RT-SP3.03-HF1.2 Bld( d031 rt-546 ) \\\NS21 current Generated 4/27/2004 3:21 PM Page 4 of 5 I I Survey Tool Measured I Inclination I Azimuth I TVD Vertical I NS EW I DLS I Tool Face I Comments Model Depth Section ¡ (n) (deg) (deg) (n) (n) (It) (n) (deg/100 It) (deg) BP _MWD+IFR:AK 1 9585.44 46.53 309.19 8873.01 16428.60 10537.83 -12603.70 1.53 -162.98G Ip _MWD+IFR:AK 19682.50 44.94 308.50 8940.75 16498.09 10581.43 -12657.83 1.72 -164.98G P _MWD+IFR:AK 19779.14 43.38 307.89 9010.08 16565.39 10623.06 -12710.73 1.67 -159.37G BP _MWD+IFR:AK 19876.39 41.79 306.99 9081.68 16631.13 10663.07 -12762.98 1.75 -161.39G _P _MWD+IFR:AK 19973.03 40.22 306.17 9154.61 16694.43 10700.86 -12813.89 1.72 -171.32G P _MWD+IFR:AK 20070.65 38.43 305.73 9230.12 16756.15 10737.18 -12863.96 1.86 -177.00G BP _MWD+IFR:AK 20168.35 37.05 305.61 9307.38 16815.79 10772.05 -12912.54 1.41 -98.04G BP _MWD+IFR:AK 20223.62 36.98 304.75 9351.51 16848.95 10791.22 -12939.74 0.95 163.84G IP _MWD+IFR:AK 20319.46 35.48 305.50 9428.82 16905.40 10823.81 -12986.07 1.63 -159.05G P _MWD+IFR:AK 20418.79 33.80 304.34 9510.54 16961.65 10856.13 -13032.35 1.82 -170.51G P _MWD+IFR:AK 20514.67 32.39 303.90 9590.86 17013.74 10885.50 -13075.69 1.49 138.03G _P _MWD+IFR:AK 20611.36 30.93 306.50 9673.16 17064.31 10914.73 -13117.17 2.07 132.34G P _MWD+IFR:AK 20708.11 29.58 309.58 9756.74 17113.01 10944.74 -13155.56 2.13 143.62G P _MWD+IFR:AK 20805.28 28.57 311.15 9841.66 17160.23 10975.31 -13191.54 1.30 69.66G BP _MWD+IFR:AK 20901.53 28.62 311.43 9926.17 17206.28 11005.71 -13226.16 0.15 -170.33G BP _MWD+IFR:AK 20999.10 27.96 311.19 10012.09 17252.51 11036.23 -13260.89 0.69 -169.78G Ip _MWD+IFR:AK 21094.19 25.79 310.29 10096.91 17295.48 11064.30 -13293.45 2.32 -163.37G . P _MWD+IFR:AK 21190.56 23.76 308.78 10184.40 17335.86 11090.01 -13324.58 2.21 -172.45G .~BP _MWD+IFR:AK 21289.70 22.14 308.21 10275.69 17374.51 11114.08 -13354.83 1.65 -171.74G ~P _MWD+IFR:AK 21383.40 20.50 307.53 10362.98 17408.55 11135.00 -13381.72 1.77 -174.02G P _MWD+IFR:AK 21480.41 18.64 306.92 10454.38 17441.01 11154.66 -13407.58 1.93 175.05G BP _MWD+IFR:AK 21578.44 17.30 307.31 10547.62 17471.22 11172.91 -13431.70 1.37 178.69G BP _MWD+IFR:AK 21674.11 16.09 307.41 10639.26 17498.67 11189.58 -13453.55 1.27 178.94G IP _MWD+IFR:AK 21772.08 14.72 307.51 10733.71 17524.68 11205.41 -13474.21 1.40 -173.91G P _MWD+IFR:AK 21868.19 13.70 307.05 10826.88 17548.24 11219.70 -13492.98 1.07 178.84G P _MWD+IFR:AK 21897.40 13.47 307.07 10855.27 17555.10 11223.84 -13498.45 0.79 -27.48G _P _MWD 22018.01 15.34 303.45 10972.08 17584.99 11241.10 -13522.97 1.72 -32.54G P _MWD 22112.72 15.97 302.00 11063.28 17610.34 11254.91 - 1 3544.48 0.78 134.57G P _MWD 22169.40 14.94 306.21 11117.91 17625.36 11263.36 -13556.98 2.69 O.OOG 22261.00 14.94 306.21 11206.42 17648.93 11277.31 -13576.04 0.00 O.OOG To MD I Survev TVDe: Definitive Survey NOTES: Only depth error sources are used from surface to mud-line. I Survey Error Model: BP ISCWSA version 8 ... 3-D 95.00% Confidence 2.7955 sigma Survevina proa: MD From (ft ) 0.00 0.00 1397.00 21897.40 MD To ( ft ) 0.00 1397.00 21897.40 22169.40 EOU Frea Survey Tool Tvpe Act-Stns BP _UNKNOWN (default tool used) Act-Stns BP _GYD CT DMS Act-Stns BP _MWD+IFR:AK Act-Stns BP _MWD I I I I I I I DDToolBox Ver 3.1 RT-SP3.03-HF1.2 Bld( d031 rt-546) \\\NS21 current Generated 4/27/2004 3:21 PM Page 5 of 5 NS21 - Spud 11/16/02 pro0nosed TOrS I Actual Depths I Delta I Days since 11/16/2002 Formation TVDss TVDrkb MDrkb TVDss I TVDrkb I MDrkb TVD Spud Top Permafrost 1,150 1207 1213 1151 1207 1213 -1 1 11/17/2002 Base Permafrost 1,520 1577 1609 1521 1577 1609 -1 1 11/17/2002 SV6 - top confining zone 2,998 3055 4255 2999 3055 5244 -1 2 11/18/2002 Surface casing point 3,160 3217 4621 3161 3217 4621 -1 2 11/18/2002 Well suspended 1112012002 after surface hole - moved back over well 3/4/2004 474 3/412004 SV5 - base confining zone 3267 3324 4919 3260 3316 4882 7 5 3/9/2004 SV4 3,572 3629 5764 3566 3622 5724 6 5 3/9/2004 SV2 - top upper injection zone 3,962 4019 6843 3964 4020 6800 -2 6 3/10/2004 SVl - top major shale barrier 4,352 4409 5038 4351 4407 7848 1 7 3/10/2004 TMBK - top lower injection zone - Top Ugnu 4,719 4776 8939 4691 4747 8830 28 7 3/10/2004 WSl - top Schrader Bluff - Base Ugnu 6,312 6369 13349 6249 6305 13183 63 9 3/12/2004 CM3 - Base lower injection zone (top Colville) 6,941 6998 15090 6907 6963 15005 34 10 THRZ - Top HRZ 8,671 8728 19361 Eroded as suspected 16 BHRZ - Base HRZ 8,671 8728 19361 Eroded as suspected 16 Top Kuparuk 8,701 8758 19400 8900 I 8956 I 19702 -199 16 Kuparuk C 8,996 9053 19831 Faulted out 17 Fault 26 throw = 200' 8,996 9053 19831 9087 9143 19962 166 17 Top Miluveach 9,291 9348 20215 9264 9320 20181 27 17 Intermediate casing point 9,341 9398 20277 9298 9354 20227 17 Intermediate logging point 9,341 9398 20277 No wireline logs run Top Kingak 9,734 9791 20744 9746 9802 20760 -12 24 Top Sag River 10,792 10849 21878 10834 10890 21933 -42 25 3/29/2004 Geol target #1 10,792 10849 21878 10834 10890 21933 -42 25 3/29/2004 Intermediate casing point 10,822 10879 21878 10845 10901 21945 -23 25 3/29/2004 Top Shublik - 90 10,866 10923 21953 10893 10949 21994 -27 25 4/16/2004 Top Ivishak 10,996 11053 22045 11019 11075 22125 -23 43 4/16/2004 Oil- Water contact 11,101 11158 22193 11100 11156 22209 2 43 4/16/2004 Total Depth 11,121 11178 22214 11150 11206 22261 -29 43 4/16/2004 ------------------- Form. Evar. Logs
