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210-102
Operator Name:2. Development Exploratory Service 5 Permit to Drill Number:210-102 6.50-029-22645-61-00 Prudhoe Bay, Prudhoe Oil Hilcorp North Slope, LLC 5. Well Name and Number:8. 10.Field/Pools: Well Class Before Work4. Present Well Condition Summary:11. Total Depth: measured feet feet Plugs measured feet feet Effective Depth: measured feet feet Packer measured feet feettrue vertical true vertical 15257 15257 8913 11702 None None 8804 Casing: Length: Size: MD: TVD: Burst: Collapse: Structural Conductor 80 20" 30 - 110 30 - 110 1490 470 Surface 3297 9-5/8" 29 - 3326 29 - 3039 5750 3090 Intermediate 11899 7" 27 - 11926 27 - 8900 7240 5410 Production Perforation Depth: Measured depth: 11926 - 15257 feet True vertical depth:8900 - 8913 feet Tubing (size, grade, measured and true vertical depth)4-1/2" 12.6# 13cr85 25 - 11951 25 - 8910 11702 8804Packers and SSSV (type, measured and true vertical depth) 4-1/2" HES TNT Perm Packer Liner 1753 4-1/2" 11948 - 13701 8909 - 8911 8430 7500 12. Stimulation or cement squeeze summary: Intervals treated (measured): N/A Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing Pressure 23704504850 6810 200 0 0 3110 Representative Daily Average Production or Injection Data Prior to well operation: Subsequent to operation: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Name: Contact Email: Brian Glasheen Brian.Glasheen@hilcorp.com Authorized Name:Stan Golis Authorized Title: Authorized Signature with Date:Contact Phone:907.564.5277 Treatment descriptions including volumes used and final pressure: 13. Sr. Area Operations Manager Operations Performed1. Abandon Plug Perforations Fracture Stimulate Pull Tubing GSTOR WINJ WAG 5 GINJ SUSP SPLUG 16. Well Status after work:Oil Gas Exploratory Development Stratigraphic 15. Well Class after work: 5Service WDSPL 14. Attachments: (required per 20 AAC 25.070.25.071, & 25.283) Daily Report of Well Operations Copies of Logs and Surveys Run true vertical measured8913 Sundry Number or N/A if C.O. Exempt: N/A No SSSV Installed Junk Packer Printed and Electronic Fracture Stimulation Data 5 Open Lateral Leg Access Operations shutdown Change Approved Program 5 N/A Senior Pet Engineer:Senior Res. Engineer: STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION REPORT OF SUNDRY WELL OPERATIONS Suspend Perforate Other Stimulate Alter Casing Plug for Redrill Perforate New Pool Repair Well Re-enter Susp Well 3.Address: 3800 Centerpoint Dr, Suite 1400, Anchorage, AK 99503 7.Property Designation (Lease Number):ADL 0028257 S-41AL1 9. Logs (List logs and submit electronic and printed data per 20AAC25.071): Stratigraphic Other: API Number: Form 10-404 Revised 03/2020 Submit Within 30 days of Operations By Meredith Guhl at 9:58 am, May 17, 2021 Digitally signed by Stan Golis (880) DN: cn=Stan Golis (880), ou=Users Date: 2021.05.16 03:46:30 -08'00' Stan Golis (880) SFD 5/21/2021DSR-5/17/21MGR26JUL2021 RBDMS HEW 5/17/2021 ACTIVITY DATE SUMMARY 5/2/2021 ***WELL S/I ON ARRIVAL*** 2 RUNS WITH 4 1/2" B SHIFTING TOOL TO XD SSD @ 11,842' MD (sleeve shifted on 2nd run, confirmed by pressure change & shear pin condition) ***WELL LEFT S/I ON DEPARTURE, PAD OP NOTIFIED OF STATUS*** Daily Report of Well Operations PBU S-41A STATE OF ALASKA •LASKA OIL AND GAS CONSERVATION COMM! REPORT OF SUNDRY WELL OPERATI 1. Operations Performed Abandon 0 Plug Perforations ❑ Fracture Stimulate 0 Pull Tubing ❑ Operations shutdown 0 Suspend 0 Perforate 0 Other Stimulate 0 Alter Casing 0 Change Approved Program ❑ Plug for Redrill ❑ Perforate New Pool 0 Repair Well 0 Re-enter Susp Well 0 Other:Close Lateral Leg Access 2. Operator Name: BP Exploration(Alaska),Inc 4. Well Class Before Work 5. Permit to Drill Number: 210-102 3. Address: P.O.Box 196612 Anchorage, Development 0 Exploratory 0 AK 99519-6612 Stratigraphic ❑ Service 10 6. API Number: 50-029-22645-61-00 7. Property Designation(Lease Number): ADL 0028257 8. Well Name and Number: S-41AL1 9. Logs(List logs and submit electronic and printed data per 20AAC25.071): 10. Field/Pools: PRUDHOE BAY,PRUDHOE OIL 11.Present Well Condition Summary: Fl E C E 1 I E D Total Depth: measured 15257 feet Plugs measured feet MAR pp true vertical 8913 feet Junk measured feet MAR 0 8 2017 Effective Depth: measured 15257 feet Packer measured 11702 feet true vertical 8913 feet Packer true vertical 8804 feet A C Casing: Length: Size: MD: TVD: Burst: Collapse: Structural Conductor 80 20"91.5#H-40 30-110 30-110 1490 470 Surface 3297 9-5/8"40#L-80 29-3326 29-3039 5750 3090 Intermediate 11338/561 7"26#L-80/29#LS Q 27-11365-11926 27-8647-8900 7240/8160 5410/7020 Production Liner 1753 4-1/2"12.6#L-80 11948-13701 8909-8911 8430 7500 Perforation Depth: Measured depth: 11926-11948 feet 11948-11992 feet 12300-13655 feet 13701-15257 feet True vertical depth: 8900-8909 feet feet 8909-8926 feet 8995-8912 feet 8911-8913 feet Tubing(size,grade,measured and true vertical depth) 4-1/2"12.6#13Cr85 24-11962 24-8914 Packers and SSSV(type,measured and 4-1/2"HES TNT Perm Packer 11702 8804 true vertical depth) 4-1/2"MCX I-SSV 2227 2162 12.Stimulation or cement squeeze summary: Intervals treated(measured): Treatment descriptions including volumes used and final pressure: KU APR 3'61 j 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing Pressure Prior to well operation: 5180 1520 2158 Subsequent to operation: Lateral Lea Shut-In 140 900 14.Attachments:(required per 20 AAC 25.070.25.071,&25.283) 15.Well Class after work: Daily Report of Well Operations ® Exploratory ❑ Development 0 Service ® Stratigraphic ❑ Copies of Logs and Surveys Run 0 16.Well Status after work: Oil 0 Gas 0 WDSPL ❑ Printed and Electronic Fracture Stimulation Data ❑ GSTOR ❑ WINJ 0 WAG Q GINJ ❑ SUSP 0 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: N/A Contact Catron,Garry R(Wipro) Email Garry.Catron@bp.com Printed Name Catron,Garry R(Wipro) Title PDC Principal Engineer Signature e. Phone +1 907 564 4424 Date 3/8/17 Form 10-404 Revised 5/2015 V L-. 3/2 8.//4- RB D MS IAz MAR - 9 2017 Submit Original Only ,4 y7 0,9- r 0 • o _ X U / _J O Cl) C 2 \ I e p \ 0g q ƒ 2 \ w $ ® ƒ / CO co - U % \ / / ± O A 2 _ 040-ma0 \ ƒ ¢ = f / c I ± ; E , 0 0 / / 0 / I % $ / f O / O ! _i / Q Lin = z > � co' _Z k 2 .> 90Z --- I 4Q :\ < w 2 t / % i S ± 2 % < m 0 _C\ ° X ° ' ƒ u � o t w $ m \ \ r_ 5 � o R cc ‹ z ,_7. (00 --0 ,0 k < ■ a - 6 J \ & ƒ c ct / $ .- 2l- = ± < b O co I O O O 0 R f / 22Orrr - / G 7 ± G G G / _J _O A @ » 2 » 2 -1 w 00 '1-4-4-4- w 5 / E / / < < < < 0 * o w < e e 121 / / ® \ $ & / ^ / / / < mit 41/16 S-41 A VVa LFEAD�= FMC • SA TES: WB.L ANGLE>70°@ 12069"*"41/2" ACTUATOR= BAKER CI-ROME TBG BLIR" oKB.air= 71.2' L1 BF.ELEV= 37' KOP= 1131' Max Angle= 98°@ 14863' 2227' H4-1/7 FES X NP,D=3.813" Datum ND= 11843' GAS LFT MANDRELS Datum ND= 8800'SS ST MD 1Vt) DEV TYPE VLV LTCH FORT DATE 9-5/8"CSG,40#,L-80 BUTT,D=8.835" H3332' 5 3742 3331 48 KBG-2 DMY BK 0 03/03/14 4 7112 5568 47 KBG-2 DMY BK ' 0 03/03/14 3 9705 7345 47 KBG-2 DMY BK ' 0 03/03/14 7"CSG,26#,L-80 BTC,.0383 bpf,D=6.276" —1 11371' }-->R 1111, 2 11639 8777 65 KBG-2 "DMY BK ' 0 11/17/15 1 11808 8849 64 KBG-2 'DMY BK ' 0 06/13/11 'STA#1 IS BB-OW PKR,UNABLE TO USE FOR GL Minimum ID = 3.725" @ 119161 "STA#2=EXTENDED PACKING 4-1/2" HES XN NIPPLE 11673' —{4-1/7FES X MP,ID=3.813" ,7,-1 E�� 11702' 4 7"x 4-1/2"FES TNT PKR ID=3.856" 11778' H4-1/7 FES XNIP,D=3.813" IIIIP 11842' 4-1/2"FES XD DIRO SW SLV,D=3.813" I I CLOSED(08/17/16) 11916' H4-1/2"HES XN NP,ID=3.725" MILLOUT WINDOW(S-41L1)11892'-11905' ir♦44I ►•♦•�t MLLOUT WIDOW(S-41AL1) 11926'- 11939' SQUE32ED OFF 09/22/10 / 11947' H MECHANICAL CUT SLOTTED LINER S-41A1_1 4-1/2"SLID LNR,12.6#,L-80 BT-M, 13701' RA PP TAG H 11782' 0152 bpf,ID=3.958" OFEI HOLE 15257' 4-1/7113G,12.6#,13CR-85 VAM TOP, H 11951' 11951' H4-1/2"BKR TESAO(ASSY,ID=4.30" .0152 bpf,ID=3.958" 1. NMI 11111 = 11954' —i 7"X 5"l-RO E ZXPN LTP w/FBR D=4.20" TOP OF 4112"LNR —i 11954' I I 7"CSG,29#,L-80 BTC-M,.0371 bpf,D=6.184" H —12017 11976' —{7"X 5"BKR FLEX LOCK LNR FGR,D=4.220" PERFORATION 11986' ---15"X 41/2"XO,ID=3.920' REF LOG:SLB MWdGR ON 09/21/10 ANGLE AT TOP PST:94°@?? MLLOUT WIDOW(S-41A) 12003'-1201T Note:Refer to Roduction DB for historical pert data SIZE SPF INTERVAL Opn/Sqz DATE `%, `, 13350'_H4-1/2"RA TAG S-41A 2-7/8" 6 12700-13100 O 10/09/10 1111444' 2-7/8" 6 13200-13600 O 10/09/10 i•••••••••••••••4 2-7/8" 6 13700-14100 O 10/09/10 iio!••iii•►•+• 2-7/8" 6 14200-14350 0 10/09/10 .`,%♦�♦� 1a �� `. 2-7/8" 6 14940-15150 O 10/09/10 •�•�•�4 ♦♦�� S-41AL1 d♦�♦.♦A PBTD — 15326' +i!♦I 4-1/2' SLID 11947-11992 SLOT 10/16/10 4112" SLTD 12301-13656 SLOT 10/16/10 4-1/2"LNR,12.6#,13CR 86 VAMTOP,.0152bpf,D=3.958" H 15413' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04/02/96 N28E ORIGINAL COMPLETION 11/25/15 RCT/JMD GLV C/O(11/17/15) WaL: S-41A/AL1 10/23/10 N7ES SIDETRACKS-41A/AL1) 08/25/16 PLW/JMD CLOSEDSLDSLV(08/17/16) PERMIT No: 2101010(20) 06/15/11 MK/PJC FINAL DRLG CORRECTIONS AR No: 50-029-22645-01(61) 06/15/11 ALW PJC GLV GO(6/13/11) SEC 35,T12N,R12E,1128'RA_&775'FWL 06/16/11 ALW PJC RLL PX PLUG(06/13/11) 03/11/14 RKT/JMD GLV CIO(03/03/14) BP Exploration(Alaska) STATE OF ALASKA OLASKA OIL AND GAS CONSERVATION COMMI REPORT OF SUNDRY WELL OPERATI 1. Operations Performed Abandon 0 Plug Perforations 0 Fracture Stimulate 0 Pull Tubing 0 Operations shutdown 0 Suspend 0 Perforate 0 Other Stimulate 0 Alter Casing 0 Change Approved Program 0 Plug for Redrill 0 Perforate New Pool 0 Repair Well 0 Re-enter Susp Well 0 Other:Open Lateral Leg to Flow Ed 2. Operator Name: BP Exploration(Alaska),Inc 4. Well Class Before Work 5. Permit to Drill Number: 210-102 3. Address: P.O.Box 196612 Anchorage, Development D Exploratory 0 AK 99519-6612 Stratigraphic 0 Service ❑ 6. API Number: 50-029-22645-61-00 7. Property Designation(Lease Number): ADL 0028257 8. Well Name and Number: P rtY 9 ) PRUDHOE BAY UNIT S-41AL1 9. Logs(List logs and submit electronic and printed data per 20AAC25.071): 10. Field/Pools: PRUDHOE BAY,PRUDHOE OIL 11.Present Well Condition Summary: Total Depth: measured 15257 feet Plugs measured feet RECEIVED true vertical 8913 feet Junkmeasured feet MAR p 1117 Effective Depth: measured 15257 feet Packer measured_ 11702 feet r A t/1 t true vertical 8913 feet Packer true vertical 8804 feet AOG CC Casing: Length: Size: MD: TVD: Burst: Collapse: Structural Conductor 80 20"91.5#H-40 30-110 30-110 1490 470 Surface 3297 9-5/8"40#L-80 29-3326 29-3039 5750 3090 Intermediate 11338/561 7'26#L-80/29#L-40 27-11365-11926 27-8647-8900 7240/8160 5410/7020 Production Liner 1753 4-1/2"12.6#L-80 11948-13701 8909-8911 8430 7500 Perforation Depth: Measured depth: 11926-11948 feet 11948-11992 feet 12300-13655 feet 13701-15257 feet True vertical depth: 8900-8909 feet feet 8909-8926 feet 8995-8912 feet 8911-8913 feet Tubing(size,grade,measured and true vertical depth) 4-1/2"12.6#13Cr85 24-11962 24-8914 Packers and SSSV(type,measured and 4-1/2"HES TNT Perm Packer 11702 8804 true vertical depth) 12.Stimulation or cement squeeze summary: Intervals treated(measured): Treatment descriptions including volumes used and final pressure: saws) APR 1 3 2017 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing Pressure Prior to well operation: 167 575 56 1234 196 Subsequent to operation: 34 393 728 1934 330 14.Attachments:(required per 20 AAC 25.070.25.071,&25.283) 15.Well Class after work: Daily Report of Well Operations Ed Exploratory ❑ Development Id Service 0 Stratigraphic 0 Copies of Logs and Surveys Run 0 16.Well Status after work: Oil 0 Gas 0 WDSPL 0 Printed and Electronic Fracture Stimulation Data 0 GSTOR ❑ WINJ 0 WAG 0 GINJ 0 SUSP ❑ SPLUG 0 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 Catron,Garry R(Wipro) Email Garry.Catron@bp.com Printed Name Catron,Garry R(Wipro) Title PDC Principal Engineer Signature A (�„. _ Q Phone +1 907 564 4424 Date 3/8/17 Form 10-404Revised 5/2015' V7-4- 3/2 '/ RBDMS lL- MAR - 9 2017 Submit Original Only • 6 u O a 2 C I w d / .g « ƒ R S E ; < / 6 & R E E W I '- m � LI 22O. � / / � / co � : \ \ / / : co / �� z � w ow .- / pl— a O 2 % % 22CC W I & mpp > ƒ ce• W 2 a u) z as C � / \ z40 O o 3 1- / ± CIaR ± / o3U) / / \ Q O b 2 x / \ \/ % ƒ \ / : 0_ $ i 0 : \ w < 7 w - / / — \e 0 # < IVVEITR Q . 41/16 !!W • S-41 A _LFEAD= FMC • SAFATBS: Wf3L ANGLE>70°@ 12069'*"4112" ''ACTUATOR= BAKER C CHROME TBG&LW*** OKB.i3EV= 712 LI BF.REV= 37' • KOP= 1131' Max Angle= 98"@ 14863' , ' 2227' —14-1/2"FES X NP,D=3.813" Datum MD= 11843' GAS LFT MANDRELS Datum ND= 8800'SS ST MD TVD DEV TYPE VLV LTO-I PORT TE DA 9-5/8"CSG,40#,L-80 BUTT,D=8.835" H I 3332' 5 3742 3331 48 KBG-2 DMY BKIP 0 03/03/14 4 7112 5568 47 KBG-2 DMY BK r 0 03/03/14 1110 3 9705 7345 47 KBG-2 DMY BK r 0 03/03/14 7"CSG,26#,L-80 BTC,.0383 bpf,D=6.276" —1 11371' I'—X X 2 11639 8777 65 KBG-2 **DMY BK r 0 11/17/15 1 11808 8849 64 KBG-2 *DMY BK ' 0 06/13/11 ' *STA#1 IS BLOW PKR,UNABLE TO USE FOR GL Minimum ID = 3.726" c 11916' '*STA#2=EXTENDED PACKING 4-1/2" HES XN NIPPLE 11673' --{4-1/zFES XNIP,ID=3.813" R x 11702' _I 7"x 4-1/2'FES TNT NKR,D=3.856" II I 11778' —+41/2"FES X NP,D=3.813" 1 11842' 4-1/2"FES XD DURO SLD SLV,D=3.813" II 1Q,OSUl(0Ct#1146 DptyN (4/23//1) I ' 11916' H 41/2"FES XN NP,D=3.725" MILLOUT WINDOW(S-41L1)11892'-11905' tr•����" ►••�.t MILLOUT WINDOW(S-41AL1) 11926'-11939' SQUI3 133 OFF 09/22/10 11947' H MECHANICAL CUT SLOTTED LNt32 S-41AL1 41/2"SLTD LNR,12.6#,L-80 BT-M, 13701' RA PP TAG —1 11782' I-_ 0152 bpf,ID=3.958" OFEN IDLE 15257' 4-1/2"TBG,12.6#,13CR 85 VAM TOP, 11951' 11951' —{4112'BKR TIEBACK ASSY,D=4.30" .0152 bpf,ID=3.958" 11 11954' H7"X 5'HRD`E ZXFN LTP w/FBR ID=4.20" TOP OF 4-1/2"LNR — 11954' _^ 11976' —17"X 5"BKR FLEX LOCK LNR HGR D=4.220" 7"CSG,29#,L-80 BTC-M.0371 bpf,D=6.184" IT —12017 11986' H5"X 41/2"XO,13=1920" PERFORATION SUMMARY REF LOG:SLB MMRYGR ON 09/21/10 ANGLE AT TOP PEW:94'@"7?' MLLOUT VVNDOW(S-41A) 12003'-12017' Note:Refer to Production DB for historical pert data SIZE SPF tJTERVAL Opn/Sqz DATE 111111%_ 13350' _—I41t2"RA TAG S-41A 2-7/8" 6 12700-13100 0 10/09/10 i` •������• 2-7/8" 6 13200-13600 O 10/09/10 *•••••••••••••••i 2-7/8" 6 13700-14100 0 10/09/10 •••o!••••�•••►!•• wOore 1A .II'I,u�� 2-7/8" 6 14200-14350 0 10/09/10 .••••• �. 2-7/8" 6 14940-15150 O 10/09/10 ���•�•+�� �s�•�' S-41AL1 ••••• PBTD — 15326' ••moi 4-1/2" SLTD 11947-11992 SLOT 10/16/10 41/2" SLID 12301-13656 SLOT 10/16/10 4-1/2"LM,12.6#,13CR 86 VAMTOP,.0152bpf,D=3.958" —{ 15413' DATE REV BY COMIVENTS DATE REV BY COMMENTS NITS FRt1DHOE BAY MIT 04/02/96 /CBE ORIGINAL COMPLETION 11/25/15 RCT/JM) GLV CJO(11/17/15) W8-L: S-41A/AL1 10/23/10 NTE5 SIDETRACK(S-41A!AL1) 08/25/16 NLW/JMD CLOSED SLD SLV(08/17/16) FERMI No: 2101010(20) 06/15/11 MU PJC FINAL DRLG CORRECTIONS AR No: 50-029-22645-01(61) 06/15/11 ALFV PJC GLV CIO(6/13/11) SEC 35,T12N,R12E,1128'FTL&775'FWL 06/16/11 ALW PJC PULL PX PLUG(06/13/11) 03/11/14 RKT/JMD GLV C/O(03/03/14) BP Exploration(Alaska) Image Project Well History File Cover Page XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. . L Q - 1 Q a. Well History File Identifier Organizing (done) ❑ Two-sided II UIII III ❑ Rescan Needed I I I11111 11111 RE CAN DIGITAL DATA OVERSIZED (Scannable) Color Items: ❑ Diskettes, No. ❑ Maps: Greyscale Items: /Other, No/Type: GP NO. 1 ❑ Other Items Scannable by a Large Scanner ❑ Poor Quality Originals: OVERSIZED (Non-Scannable) ❑ Other: ❑ Logs of various kinds: NOTES: ❑ Other:: BY: Maria Date:ca 1-11 JLj/JL/.. /s/ le Project Proofing 111111111011111 BY: Date: caltill `if. is! 1 Scanning Preparation 3 x 30 = qo + 13 = TOTAL PAGES /b 3 (Count does not include cover sheet) rvi BY: Date: I(�. /s/ Production Scanning I 1111111 11111 Stage 1 Page Count from Scanned File: 1 0 Lf' (Count does include cover sheet) Page Count Matches Number in Scanning Preparation: YES NO BY: Date:J i#114. /s/ flip Stage 1 If NO in stage 1, page(s) discrepancies were found: YES NO BY: Maria Date: /s/ Scanning is complete at this point unless rescanning is required. 111111111 l ReScanned II I Dill BY: Maria Date: /s/ Comments about this file: Quality Checked 111111111 I 19199/9/111 \Ncll I-lictnn, it Cnvcr Ponta,Inn o "c- 9 'm I .M (4 m 2 Ill In CO Z p v o= Z _ ✓ – m Ce _���fffJJJ Z n N 5 c u ) C Z ON E O d to Iii E y 5 8 w ili C 2 o > p >X Z o U� o > ten. F. u) F- -J CL g v 1 c t a) ,— , \ > , \ 0 a0 d v J y V N N N 1 0) (O (O (O Z O 0 J E c us 2`.- – a N N N N E .2 E os I— co N 0 0 0 0 0 0 0 0 0 Ce Y < - 0 N. CI- 17 111 17 CID CO s- Z O j U l O N N N N N ' co EN z z W N m m Z c 0n rn o o rn ao d (I) .- v W W > I J a) V m a. Q d a) y z ` c a0 i CC a p • O a. Z, 0 Z o ES y c d 3 N_ o ,J 0. 1° = m a O u o > > C -6 T E CC N c0 ZI J m m N O li G O N y a)cora O ti O E o f ...1 N V ti , • 0 to CV 17 0 J U @ J a Q o 0 z N 0 la CC G Q N a) CO m Z C W CO p N p D fA W Q 00i Z Q z 0 ZI Z.- Z- Q m U o 0 j Z Z w co in EMI To C Z 0 c c CL X c c c a) o o o •o ,0 0 • M C a) > > > o 0 cc H Z p p c c c a Z N p ZO J w y J w F- Z CO ° F y '2 E o c a v NZ O .c2• W 0 Z N o 0O y LL �• >E O £ U y E ? N re d1 �. d o W E LL Q Z O a y� @ :- • re z uj 0 ..)\ \ \.:_) 0 p d Fa- o. — o)`.g a Q rn m 0 m o m r c a8i o 0 a 0 I 3 J0I W J J W 3 < 0 <Q , 0 0 O V OF T� 0,t\ \I%%%sue THE STATE Alaska 4111 and Gas ~ AL SKA :,,'Drnmr.__: _ _:r ^,, ., GOVERNOR SEAN PARNELL 333 West Seventh Avenue OAP ALAS Anchorage, Alaska 99501-3572 Main: 907.279.1433 Fax: 907.276.7542 Brian Glasheen Petroleum Engineer BP Exploration(Alaska), Inc. 1 b I d 1' P.O. Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU S-41 AL 1 Sundry Number: 313-432 Dear Mr. Glasheen: 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, QI/L" Daniel T. Seamount, Jr. Commissioner ilti DATED this& day of August, 2013. Encl. ,e3 STATE OF ALASKA 1114 AUG 0 7 2013 ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVALS A0 0C 20 AAC 25.280 1.Type of Request: Abandon❑ Plug for Redrill❑ Perforate New Pool❑ Repair Well❑ Change Approved Program❑ Suspend❑ Plug Perforations❑ Perforate❑ Pull Tubing❑ Time Extension❑ Operations Shutdown❑ Re-enter Susp.Well❑ Stimulate❑ Alter Casing❑ Other. Convert To I njection El ' 2.Operator Name: 4.Current Well Class: 5.Permit to Drill Number. BP Exploration(Alaska),Inc. Development IO • Exploratory ❑ 210-102-0 . 3.Address: Stratigraphic ❑ Service ❑ 6.API Number. P.O.Box 196612,Anchorage,AK 99519-6612 50-029-22645-61-00 ' 7.If perforating: 8.Well Name and Number: What Regulation or Conservation Order governs well spacing in this pool? 341 D S-41AL1 ' Will planned perforations require a spacing exception? Yes ❑ No ❑ 9.Property Designation(Lease Number): 10.Field/Pool(s): ADL0028257 • PRUDHOE BAY, PRUDHOE BAY OIL • 11. PRESENT WELL CONDITION SUMMARY Total Depth MD(ft): Total Depth ND(ft): Effective Depth MD(ft): Effective Depth ND(ft): Plugs(measured): Junk(measured): 15257 . 8913• 15257 8913 None None Casing Length Size MD TVD Burst Collapse+ Structural Conductor 80 20"91.5#H-40 35-115 35-115 Surface 3298 9-5/8"40#L-80 34-3332 34-3043.6 5750 3090 Intermediate None None None None None None Production See Attachment See Attachment See Attachment See Attachment See Attachment See Attachment Liner 3462 4-1/2"12.6#13CR-85 11951-15413 8910.2-8942.48 0 0 Perforation Depth MD(ft): Perforation Depth ND(ft): Tubing Size: Tubing Grade: Tubing MD(It): See Attachment See Attachment 4-1/2"12.6#13CR-85 13CR-85 32-11951 Packers and SSSV Type: 4-1/2"HES TNT Perm Packer Packers and SSSV MD(ft)and ND(ft): 11702,8803.96 No SSSV Installed No SSSV Installed 12.Attachments: Description Summary of Proposal ❑ 13.Well Class after proposed work: Detailed Operations Program 0 BOP Sketch ❑ Exploratory ❑ Development ❑ Service 0 14.Estimated Date for 15.Well Status after proposed work: Commencing Operations: 8/18/13 Oil ❑ Gas p 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 Brian Glasheen Email Brian.GlasheentanBP.com Printed Name Brian Glasheen Title PE Signature Oyer Phone Date ( I 564-5905 816/2013 COMMISSION USE ONLY 50-44 j, Conditions of approval: Notify Commission so that a representative may witness Sundry Number: ✓a Plug Integrity ❑ BOP Test ❑ /Mechanical Integrity Test Location Clearance ❑ / �iy, Other: -7`GL - t- W I if,-7 r5-5 t-el' AI I 1 - 101 rt.- ti I .rr d cc eft Y I-R h i',3ld I e jti I A - 3 . .�I� JL'Gf/ � �o ✓CYn'tc7 �r� \'1 J RBDMS OCT 1 0 201P Spacing Exception Required? Yes ❑ No d Subsequent Form Required: 6d — 40 4-. APPROVED BY ��� ' Approved by: COMMISSIONER THE COMMISSION Date: IS Form 10-403 Revised 1/2019 AppaRiic 1 i id r 2 months from the date of approval. ��g�eli/ubmit in Duplicate i 1r'1-1� g/11H13 vv ,IT` aL rG' 0 bP BP Exploration(Alaska)Inc. 900 East Benson Boulevard P.O. Box 196612 Anchorage,Alaska 99519-6612 (907)561-5111 October 5, 2012 Guy Shwartz Subject: S-41A/AL1 Conversion to Injection: Your approval is requested for conversion of S-41A/AL1 to water and MI injection service. S-41A/AL1 is expected to support S-43L1 and R-19A Sag River completions. Surface facility work and minimal wellwork is all that is needed for this conversion. The updated facility cost for this work is estimated at$1.9MM(up from $1.7MM originally submitted February 21, 2012), and wellwork cost associated with this conversion is $.05 MM,yielding a development cost of$4.75/bbl. Objectives The conversion of S-41A/AL1 targets Sag River reserves in the Northwest Fault Block. A WAG injector is needed in this area to provide pressure support to producers S-43L1 and R-19A. S- 41A/AL1 is well situated in its current location to provide pressure support and sweep to these producers. Current S-41A/AL1 Status S-41A/AL1 is a multilateral producer located in the Sag River. The well is completed with a cemented and perforated lower lateral and a slotted liner upper lateral. The well has a sliding sleeve completion to allow isolation of the upper lateral (Figure 1). The cemented and perforated lateral, S-41A, is approximately 3300' in length and has a total of 1550' open to flow. The slotted liner lateral, S-41AL1, has approximately 1400' of slots across the Sag/Shublik and approximately 1560' of open hole for a total of 2960' open to flow. S-41A/AL1 is currently an operable Sag River only producer. The well originally POP'd with only the cemented and perforated lateral (S-41 A) open to flow. The last well test with solo S-41 A lateral production on 4/10/11 indicated 167 bopd, 71% WC, and 3.4 mscf/stbo formation GOR. On 4/22/11, a plug was set to isolate production from S-41A and test slotted liner lateral S- 41 AL 1 production. The last well test with solo production from S-41 AL 1 on 05/14/2011 indicated 4 bopd, 99% WC, and 512 mscf/stbo formation GOR. The high watercut of the second lateral was not a surprise as resistivity curves during drilling indicated the lateral to be water wet. In order to obtain permits for a conversion to injection, sufficient isolation of the reservoir section must be demonstrated. During drilling of S-41A/AL1, a USIT log was run in the 7" casing across and above the Ivishak and Kuparuk sections. The USIT showed good cement above the Sag River. Page I of 3 Facilities Scope S-41 A is located on the northern expansion at S-Pad which is designed with a trunk and lateral system. To convert well S-41A to water and MI injection requires tying this well into the PWI system and MI injection service at S-Pad. S-41A will also have to be segregated from the hydraulic triple with S-42 and S-43. The cost estimate for this is $1.9MM, and the scope of work involved in this conversion includes: • Disconnect and remove production and test header divert valves. Install blind flange on header. • Remove production line from header to lateral valve. Production line will become the water injection line down stream of the lateral valve. • Remove production lateral valve. • Remove gas lift line from gas lift header to well. Install blind on gas lift header. • Safe out water header and cut in a new 4"tap. • Safe out MI header and cut in a new 3"tap. • Install a new 1500#, 4" double plug valve and lateral line from the new 4"tap to the existing breakout spool on the old production line. • Install a new 2500# double plug valve and lateral line from the new 3"tap on the MI header to the well. • Install a new standard WAG injection riser with a 2500# actuated choke valve. • Install a new hydraulic safety system in well S-42. This will allow well S-41 to have a stand alone hydraulic safety system to segregate the injector from the producers. • Install pressure switches on both MI and WI lines for shutdown. • Install new Pressure transmitter and temperature transmitter on the downstream side of the choke valve. • Install an Endress& Hauser flow transmitter on the WI line. • Install a flow transmitter on the MI line. • Install PI's as required on a standard injection well. Well Work Scope An AOGCC witnessed MIT-IA to 4000 psi, PPPOT-T, and PPPOT-IC will be performed after conversion to injection. Wellwork to dummy the current gas lift design will also be required. An estimated $.05 MM will be needed for this work. onCvr. 71e fibjerf v-p�( 44S / r6c1vcebt gSSGP (04 verr,4 , To oto t M i o r 4i well* flaw/ /14(04, `ecOvel!! Page 2 of 3 Attachments 1REE• 1)16'4'111 N 5 -41 A HI.IEw• FiC SAFETY NOTES: ZELL ANGLE s717 la 12089'"-1-1lI' ACTUATOR* BAKER C CHROME TOG A L PR.1". KB REV• 712 L 1 BR REV* 37 Ids 1131' fiff 41( ; 2227 H412'NESXNP,D•3813" Daft ID* 11843 Mut*WD* 8801 SS GAS LET IMPERILS I B-HS C G,401,L$OBUTT,D*6835• H 3332 ST PAD ND Dee TYPE VW LTO4 FORT ERIE 5 3742 3331 48 KBG-2 DOME EP '12 06/1 311 4 7112 5588 47 MG-2 DOLE OK '16 08;13'11 1 r CSG,?88,L-80 BTC,_0383 tor,D•6278' H 11 371' 4 - 3 9705 7345 47 KBG-2 13D1E etc Ir 36 08:13/11 2 11839 8777 65 KBG-2 SO SC '22 08.1911 1 11808 8848 64 KBG-2 IMO" BK r 0 06113111•SPA N CI BELOW PIER TO USE FOR GL Mini MUM ID = 3J1S'Q 1181 �•`•�• 4-1.12"NES XN NWPLE 11 3' --I4.1a'1fSXl4P•Ct=3813' I PT"' r>,:. I 11707 LI r a 4-1.2'HIES TNTWE!,D'1858' I El , 11778' '--I 41729IES X NP,II*3.814' I 11842 114.1 a-PIES 7U)Elmo SD SW,ID*aa13' I y , I 1 1918 H4-t a'ms JC4!p,D*3.70'7 I MILLOUT WNDOAW(S-41L11 11882`-11106` ♦ ■ Lr %-.OUT'N't*Xf oIS41ALT) 11926-1 1953 SQUEEZED OFF 09/22/10 1 194 r HNED,, '4 AL cur SC+rreo l_ Bat I —`- -- S-41AL1 4-117 51_713 NR,12.89,1-80 BT-st H 13701' (RA r 4 TAG H 117ffi' .fr 83b103983- 1 Dg81 POOLE 15 7 (4 ta'TBG 128i,17C1183 VANTDP -I 11951' I _ - a 119 51' -12'13FCft TirRACX ASSY,D•4 3 7 At52bpf,0*3955' 11954' RIEZXPNLIP•.'%R. C 10428' I0IPOF4-112 991 119954 NM H 1 0 ---- 11976' H-- +:5"BPRR8(LOCK_4R# D*4.220" I r CSG,29101.80 BTCN,0371 bpf,D*8184' H -•12017 I 11986 I I S X 4-1 a-ma,D*Q Cpfl" R3WCRATIONSUMMARY !EF LOG:SB NAUM ON 0974'41410 %AL_''OLT L NCOR(S41A) 12003' 12017 ANGLE ATTOP F_94"Pit 17 , ----___ Nola:Wier is%doct r®for Palatal pal data S LE SPF INTERVAL Op VSoz DATE ------_____` • 133,111y 51,2'RA TAG allialiki 1944A -,***■• ---- 2-718' 8 12700-13100 ' 0 1009110 2-718' 6 13200-13800 0 10/09110 iii•*•:*ii• ..•.....• '1A "II. 2-718' 8 13700-14100 0 10,09110 ►-�,�4:44i0_►_�_ 2-718' 6 14200-14:340 0 10/09110 �'y4 pis,t,0Ia �r— 2-718• 6 14940-15150 0 1009110 �i�*♦+r PBTD 15326' %'*�, /3.41411.1 4-1/7 SID 11947-11992 SOT 1016110 4.117 SLID 12301-13668 SLOT 1019110 - 2'_4l 12.64,134'1115 VAN 1138-01834:4,1)*3358' 15413' DATE REV BY C OPMEYTS BATE RV BY CO MIENTS FIB BAY UNIT 0488 NNE OPICINALCONIPLESK)N 06115111 WC/ MA I .02 WB.L_ 3.4141AL1 '1012110 NIE S SDE711A4'K(S414)AL 11 08115/11 ALFP RIC C2_V CAD gin 511) FERRO-No.2 10 10 10 120 0412911 KLS/PJC SET SPNG(03'31111; 08116/11 41141 RIC Pill PX FILL(08113/11) AP N0/: 504029-22645-01(61; 0421111 AIN P J C S T MN(04/22/1 1; SEC 35,T121I,R12€,1 1 2 P &775'RV? 01129111 JL8 RIC SET SNAG(0!/'23111; 05104/11 PJC QILG 3R11FTCORR-:' ' 8P 1%0 orattion(Alaska) Figure 1: S-41 A/AL 1 WBS Page 3 of 3 ITREE= 4-1/16"CMJ WELLHEAD= FMC S-41 A 8:LNR***WELL ANGLE>70°@ 12069'***4-1/2" ACTUATOR= BAKER C CHROME TBGG KB.ELEV= 71.2' L 1 BF.ELEV= 37' KOP= 1131' Max Angle= 98°@ 14863' Datum MD= 11843' ' ' 2227' H4-1/2"HES X NIP, ID=3.813" I Datum TVD= 8800'SS GAS LIFT MANDRELS 9-5/8"CSG,40#, L-80 BUTT, ID=8.835" H 3332' ST� MD TVD DEV TYPE VLV J LTCH�PORT DATE 5 3742 3331 48 KBG-2 DOME BK 12 06/13/11 4 7112 5568 47 KBG-2 DOME BK F 16 06/13/11 7"CSG,26#,L-80 BTC, .0383 bpf,ID=6.276" -1 11371' j-* IIM X 3 9705 7345 47 KBG-2 DOME BK ' 16 06/13/11 2 11639 8777 65 KBG-2 SO BK F 22 06/13/11 1 11808 8849 64 KBG-2 *DMY BK ' 0 06/13/11 Minimum ID = 3.725" @ 11916' ' *STA#1 IS BELOW PKR,UNABLE TO USE FOR GL 4-1/2" HES XN NIPPLE 11673' 1-I4-1/2°HESXNIP, ID=3.813° g I 11702' 1_1 7"x 4-1/2"HES TNT PKR,ID=3.856" I ' 11778' 1-14-112"HES X NIP,ID=3.813" I i i 11842' H4-1/2"HES XD DURO SLD SLV,ID=3.813" I 11916' 1-14-1/2"HES XN NIP, ID=3.725" I MILLOUT WINDOW(S-41L1)11892'-11905' ':4 • MILLOUT WINDOW(S-41AL1) 11926'-11939' SQUEEZED OFF 09/22/10 11947' H MECHANICAL CUT SLOTTED LINER I S-41AL1 4-1/2"SLTD LNR, 12.6#,L-80 IBT-M, 13701' RA PIP TAG —I 11782' I--1 0152 bpf, ID=3.958" OPEN HOLE 15257' 4-1/2"TBG,12.6#,13CR-85 VAM TOP, -1 11951' I ( 11951' I-14-1/2"BKR TIEBACK ASSY, ID=4.30" I .0152 bpf,ID=3.958" 11954' H 7"X 5"HRD-E ZXPN LTP w/PBR,ID=4.20" I TOP OF 4-1/2"LNR -1 11954' I ...„...... 11976' 7"X 5"BKR FLEX LOCK LNR HGR,ID=4.220" 7"CSG,29#,L-80 BTC-M, .0371 bpf,ID=6.184" -12017 11986' H5"X 4-1/2"XO, ID=3.920" PERFORATION SUMMARY REF LOG:SLB MWD/GR ON 09/21/10 MILLOUT WINDOW(S-41A) 12003'- 12017' ANGLE AT TOP PERF:94°@??' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL Opn/Sqz DATE ` ` 13350' I�4-1/2"RA TAG ,;.._ S-41A 2-7/8" 6 12700- 13100 0 10/09/10 2-7/8" 6 13200-13600 0 10/09/10 ••♦•�♦�♦�♦�♦�♦�♦• ••••••••• ■ 2-7/8" 6 13700-14100 0 10/09/10 i"••••••�► '1A L∎♦♦♦♦♦� 2-7/8" 6 14200- 14350 0 10/09/10 �■11-1, ♦O1�� '♦►. 2-7/8" 6 14940- 15150 0 10/09/10 .••• �♦�� S-41AL1 PBTD -1 15326' 4-1/2" SLID 11947- 11992 SLOT 10/16/10 4-1/2" SLID 12301 - 13656 SLOT 10/16/10 4-1/2"LNR,12.6#,13CR-85 VAM TOP,.0152bpf,ID=3.958" —I 15413' I DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04/02/96 N28E ORIGINAL COMPLETION 06/15/11 MK/PJC FINAL DRLG CORRECTIONS WELL: S-41A/AL1 10/23/10 N7ES SIDETRACK(S-41A/AL1) 06/15/11 ALH/PJC GLV C/O(6/13/11) PERMIT No: 2101010(20) 04/29/11 KLS/PJC SET SPMG(03/31/11) 06/16/11 ALH/PJC PULL PX PLUG(06/13/11) API No: 50-029-22645-01 (61) 04/29/11 ALH/PJC SET PXN(04/22/11) SEC 35,T12N,R12E, 1128'FNL&775'FWL 04/29/11 JLJ/PJC SET SPMG(04/23/11) 05/04/11 PJC DRLG DRAFT CORRECTIONS BP Exploration (Alaska) S-41A Area of review The following wells R-20A and S-12 are within the '/a mile radius for review in preparation for the S- 41 A conversion to injection. The cement jobs for each of the wellbore and the current well status are provided. Top Nest ak Structural Contour Map � � �∎� -.. -c., ___,,, ..„_...._. _.7-1 1..; 1.:'''''',,. „_____,`::::, - m� �� a _- 1 7 1 , 1 ♦ \/4. s 1.4.%r , ,, \\\ \FA:. % X , X O 1 \ `t , 7 i•U' . I Tti ^ , / / 's -�% % #. , ,.;mot rN tall) ca.* __ • t '♦ 5-4tA%mat ~' I / ,\ _..--1 r . - i'''...4' / • °. —,---;"--*://'°.' -- r,,,„, ,_:. . _II': - _....... . ....... ... ___ rrrt -...ispeP . , 1 w w .....,- -,...„.........._ . .. E , IMMO • • S-41A Is our current operable producer that we will be converting to and injector. When drilling the well we evaluated the 7 in casing after we pulled the old tubing. The USIT log is attached and shows good cement from TD to 3300 ft. Our SLB engineer has reviewed the log and feels the well has good cement. Scbluuberger Company: BP Exploration (Alaska), Inc Well: S-41A FINAL Field: Prudhoe Bay gh: North Slope Alaska USIT Log g CCL/GR/GPIT/ USIT-D 24-September-2010 .e 5 1127.00 FNL&775.48'FWL Bar,: KB. 8 sa sa.f,�. Q.L. �F a $ Permanent Drum: MSL Boy, 0.0011 Momured From: Rt0 eL+aNepOOjDatum Or111ln8 Mewrured From: R(6 I all APt Beryl No. Section Township Ranpa gg y0� -01 96 12N 12E LomYng Dow 24-9Ip-2010 fin Number 1 Depw Drew 1202011 Schketmger Depot 1D not topped Boo=Lop Irearrel 12000 ft Top Leg Wont eo It FINAL Carp nold Typo Dino a4 bNO10 CF11euritool Oft BfT/CABficWruBNB STRING BA Sine 15001n Fran OR .,._ To 124091 CwdneutrYrp$ito 7.000 In Nhip1� 20 IhrnOt Ondo 1J0 From 0$ To 11371 1 Mtinam Rooardrad Temperatures 162*DV I I Loom On Bottom Tier U mbr I Lo I �Prudhoe Bq T,O i %corded 00 B.More/W.Rhauel Velbieeeed Oy B.Decker/R Clolicar • • r f , r 1 ' 1 1.11 .. ii .., t, , , . 1 f 1 _ • ....,, • r m I III . . f , i 4 . 0, . .....• I .1 ' 1 I • . „ a so• I* -11,4 ' 4 1 1, -4. .__ •.. •.. .• „it . .• 1 11 .4.. ,... 4 - ....... .• 4.1 , . . •.. .. orai III ill' 1 I i...."1 4 ' • . ... . . • O' , ,, ,,fi II ' I ' ' ' 4 I tow* i ll 1 0 ". 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I • r Mow* fal MAC • i r•1 OP Was IWO=11•0114111 IMO M IM comPoromon NAt� WV N. agleam OS*0 AEI •••• ■••■•••• R-20A- Is currently a LTSI not operable injector with a 32' surface casing leak. The cement bond log attaches shows good cement and has been reviewed by our Eline well intervention engineer. FILE COPY , c: 1,-, 4, BP EXPLORATION (ALASKA). INC. WELL: R-20A FIELD: PRUDHOE BAY BOROUG4-4 NORTH SLOPE STATE ALASKA , i , CEMENT BONO LOG�� SchkarTib rc�er GAMMA RAY/CCL 25-OCTOlM-1909 r a $ j5 i amma.toTlt - RY ant g6. a,ailArha u snt 1 i i I i 1 Parameat Da. KEW Elow- Ati______ OF Oli t ant abate Item OWE 8 f dar p Bonn.a ruin .MCA i1I* -.n. *n SECTION 1C7110Aw► 1 mot L �, , 30 tal CIE idn tisdtr 3tff Oka DON j1 acliftwiamps Owe, "Wm 1petimta 1INItt Tls Los mom. ,,W6+ __c!...ni Auld TT SiiOEY...CEti WATER ._ t•try Tl•_ wry _ _RIO .. 96006 Pm t'Malt Fe NM* clitstfl'14hsfir _aapoll . 0411 12l 4M _..—....___.._.._...._.._._..._ Rum 11108 R Mhrnuu N`mni.TrnywM. 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When drilling S-12 9-5/8' Casing was set and a 7 " liner was also set. For the 9-5/8' casing 1360 sacks were pumped and we saw the plug bump. Also tested casing to 3000 psi For the 7" liner 460 sacks were pumped and we saw the plug bump.Also the liner lap was tested to 3000 psi. Below are the drilling reports referenced in the summary above. jl II , . SON 7../BP DAILY DR ILL ING REPORT 6606 NO LAS ........-----...... - -- A B C D E F G N 1 AW-Fi 9!I- i. :12., DAY NO DEPTH 24NR,EirrG i v /0704 IMIATNER 2 r DI BEDS FLEL WATER A/F/0 BOP 5 LoPYR Li $2. 7,4 - f OV • / 3 CLRRENT 0 PZRAT IONS DIVA V. , 4 PT LD/HT V I S PV.TP GELS TIPP FL CAME 1 9 8 -1-1- s-4. 2,4 - 5 PN - SAND SOLIDS MT-HP CHLOR RNF 75'F il 1g 4 ree 1 ‘00 . 6 WELL COST I HUNG TANG TOTAL ,I ios/4-is 6a-37.c a /73A-208 7 on.G ASSY B IT NO 0'4/S Zr 7..e...4 SQ r 1 X-• 5* 3 le* 1# r. t 1.104•1 * A 1/41 1?P E PIT NO SIZE MAKE TYPE 5R NO JETS DEPOLT FIG II- , lek115 riPS Nf ,4.../4 0 2 4 A_el. ...A.4., 9 PIT NO RT MRS WEIGHT RPE PSI LAIR SE SR" GRADE 10 $V MO COMDIP ANG/DIR TVD SECT M/SCO 1/WCO DLS f 'c,,,..r...., 2,, - <--,, - - 41•'..1,ir"`• ,7-, ...,, 7 - ' , - •.- ,5. 21c-, *, „-) • /,” 7 4.;, ..••7-, 1..4.; ,.. , :7- -1, - 12.V213111FiCIIIIIiiiMILY1'r21/7 . - "--,A.4-4 I I $IMPART 6P OPERATIoN5 , f 4 CrA4- 4'4,Re1 &A 0'r .- ii"iit 4 . cc /4ter,v log/ 4; 06,4., - 40■14 4P‘. /*WA.// cr/C - c f 3.1- 6 eee... e...•/4%4 .P.iv". is'/ Ti rOf r• re i - "" A4i410 ,e,,.... . AVIY /-76. rc etarl X' A-f ?Or 090.644e$ %iv-0 ,A3.4A5 - J4 /2/1- / 20,e-..4C 0 10,//Z4 P........, A,,e*•01 Ria1PC e 1 IC 1 . .. i -/.!..!..., DA-sv 04.'0 . $E7 PI! ? .co...---or _ 0.4:v Rs c4 cafe Tr r I 40< - AZ4 r.., e,,,, z•.° s-7-044t--„ / 37...) - /4fi- 13..44., a-dirro. - M 13 e—,cr. Rt4- /-61•(t1' . Drew eg4ecr n•mw,'" 1,! Pacrw- Poc . .■ ,Al- - 1,179a 014 X _/4r, le) /4c T., 1,---, ! - b„.1„ r e If,,...f., I 70o - .00 , ificeecr u-lee,/ ..40.0 ce46‘. 0.,,e ,prs (4/g '.a /430 -/It." Re/d„,,„. (-wry,r„ 4-#4vh....2 r-,..ot..S , C C tifre .•;/owl 0/ANdi E. 401 'I f/4; IA,sro ft, l'ACK-,.s..0- I( re--r, 4-1 O' •. 1; 2.0 4,- /A.I''e 4... r•-3••• /AA e-r A----4 ,e1 4-)r _2.-_1'.- -' .,+•■ i7LA -..,/' . re /ei r, 0,4/. I 1 I 1 1.04O -,o cy ri.e.LC o.-' Pd-Aesx ,r ,V..e,,:" is". /3.1/ i i I I SOH., BP DAILY DRILLING REPORT - • •62.2 HOURS A I DATE WELL R 2O DAY NO DEPTH 11111tR rra i-7 -$t S-11. 7'te ' I,of• Z 2 HEN REDS FUEL WATER A/F/ BOP 31UPWR £4 sl- 34 44 971t4441-st 3 CURRENT OPERATIONS 41/2.44 • YLD/VT V IS PV-YP GELS TLYP FL CAKE St 6 t - 2-41 74• 4.1 1. 5 PH SAND SOLIDS HT-HP CHLOR RPIF 75.F 0 70o 6 WELL COST INTANG TANG TOTAL 173 70e /64/959 • DRLG ASSY BIT NO.01-,1 Ara,tieret Sci 4 TIC C• 3 Dc 3*1"• S• ihm.r•TAR - • BIT NO S ZE HAKE TYPE SR NO JETS DEPO UT FTG 46-/3 1191- 7.0".. SM..* A. oz lIZ te. 9 PIT NO RT HAS WE!GMT NW PSI LIIR St SW GRADE ID SV MO COMDEP AN 0/ I R TV D SECT N/SCO Z/VCO DLS 1ø. ,.#e e, 10, I I SUMMARY OT OPERATIONS • 91.0. ‘ora. A4.4% of34. -et pp 7241 cAlsewhq "4.09'If al( 1/011. 7o ‘40•1- /1'. f3c3 441.001 r, Too& Ape ArdUe 4' oribre- ta• - /341. D& •7 1•4460 , i Atodir C sc.ac, ref T Jam /310 -/mr Dive c op T C.a.T T. 5'q.1"- 06426 "ati, SOH ./DP DAILY DRILLING REPORT 261111. 110 LAS . . . A Is C 0 E F 8 H I DATE WELL RIG DAY HO DEPTH 24HR FTC WEATHER S-EZ-ft .5t-it 22E if "Sb , 2 MEN BEDS FUEL WATER Alf/D BOP - SUM ''kei s7_ 7 f, /00 9a 5-.Ei-SE ASILAW WZ15?..-• 3 CURRENT OPERATIONS ecEetri oc, r c 447- 4 MLD/VT VIS PV-YP GELS TErP FL CAKE f.c. 17 16- 7 2.-5 TO Y.0 1. 5 PH SAND SOLIDS MT-11P CHLOR RrP 75'F 0 L.- 60O /. 8- , 6 WELL COST INTANO TANG TOTAL 141Z10? CliSO 3 1-17z. •ot 7 DRLG ASSY BIT NO. Ira isfr,seR4,64, xo„ z.Dc„ / X 0 it 7:44/cEy -TAWS .--- E PIT NO SIZE MAHE TYPE SR HO JETS =VOLT FTC N/2 0 e/3 i i 1/ /ge-O . Al A litlil 9 PIT NO RT MRS WEIGHT RPM PSI LNR SE SFr GRADE 10 SV NO COrDEP ANG/DIR TVD SECT N/SCO E/VCO DLS , 3f an 7 ci&e,le -7 iwert• /534.C3' Stu 'y-<off-epic% Wit ig Fir 74)40 tiCy • l,SO H&c . coc.44q -rot r. I/797.o 1 4 )4 0 fey i 4.co Ly..44 tier . ii 77 • 51 14'Pf2c Af4.4‹s4 Tr rcy r ii 036 14 "4114,ir4A. 71-.,/ e /0 tly,4/ -r c 3444g 4 4 altA) 0 /3S t F -.• 11 3 Ur/NARY OP OPERAT I ON 5 t 2 Goci - q AC r111.1 7• 4/AoiSie 1 f I.'S-F.6u. 0-I4/4 0 V r - If 00 toy ad/ 5 .„ /e tifc) - /43o Ca(.. fvoc... or uz,z)e i Y'ci °' P47' r4 30- /4-4,0 -RH./ To Wiles zi. - i Sao- I 6"la ME iy, c 4 r. 11E40 A __16To-1760 fix 94 Pu a 4 p -44c, SW fro-F cOmeArr _Oro- I7 PsyaCE c,W7rsizji‘ le.f 74,44(jor - 73ci<4 o pt.446 wIldoe ACT, 174.r-lid° Sir WAV - tub" co 4/41 ,7 7.o4 --- . i i .a.6-'Pao 7',c)H c 1 r Si a s j i• (V3 CI 04,6 Cf-E42 Fc..041#2. jt To 444.p "9"-4. - — i - 2/1X 7.40 Ai - c-41 Do 41.1.41 'Iry Ar.4114, TodC, _... -c/44-...0 00 /44,ce v. -14 - , Dowd/ Tokorrow 1442-1 VII tit a I do - o/4 r CA/ DO 4-1 2/ III DP 745 Cher (0 97$-J ! 0/4r- °zoo 732E44 C/2C • I °Zoo- 0230 'kW', To 17531 0 Z30-rr 4so ctr4.4.1 c rcr r c AA r "7-0 10 zgo' i Li • SOL ,I BP DA 1LY DRILLING REPORT ' 06U HOWLS A 1 DATE WELL RIO DAY NO DEPTH 24HR FTC WEATHER 5-Zi•82 4--iz tie zci •8 2 PEN BEDS F LI.1 WATER AfF/D POP 5 UM -37 5z riff ;81) 4 5--2P-22, nramOWOEZ 3 CURRENT OPERATIONS CI.E41.//,1 PC)) 7-5", 4 YLD/WT V I S BY-TB GELS TRIP FL CANE el 6 3 S- 12- 2. 1-1 ets— /6-0 5 PH SAND SOLIDS NT-HP CHLOR RPP 75•F /2 0 8 60a 6 WELL COST I NTANO TANG TOTAL /5-0483+ 61.95-03 -7..204337 7 DRLG ASSY BIT NO. - r, g■Ipee.,{C)„. Z AC•0 0 , zans- • vir,secapim,NO, b< 4 L s. , wo C l'a l• BP, S S S" $ BIT NO SIZE NAME TYPE SR NO JETS DUO LT FTC /3 X ‘119F4 Aeodrat 4 4 ozc 4.4-r gel/ rorc OW(/ iLL o 'r 11797 9 BIT NO PT MRS WEIGHT SW PSI LIM SE SM. GRADE /3 5 C4E4 Ad 0C-,r 11 IC $v NO COBDEP ANOIDIR TOD SECT N/SCO 2./WCO DLS 1 rrrtifforrfMTT6t/S 4,to- one) Cc6" oc.r c*fr TO 41.4/EIZ 1-040 (4) /42 Cc) -o c_(4,C- 41 ‘;)/././)., 444/6 . - 1/47-1; — Tar cilia ro Icrob P.f.r _ - t zou -Pa e4 t i.4r 00(-4-14-' 7 /i4 12 - 14 I c ‘•44/GE -To 3'4 t ACK cif 4148/i4 f 37 PR- eels" - (44c rim sv ZIP 70 ozfi (#LCd - D2/e.z. our C4/ 4•i Ode (P C•Aefa o7X. - 1730 loy(6 i lob isatc.c our 1V-04E - :Poo - 1130 giN r.7 11471 zoo - 2110 ccf4b4i ovr ciarCa lb C.c,117/V 4 Molt. LIAO *or- zrio- zee) cei44rerE c,cir v4 s',/ PI Re edSC/CY z zoo - Z4 ae... Feu 1514 DreiC.U.41 GaM■Otho to 4444, - otero (ciF4ou our 1(4,62 -To F:cocu4/2- a? 1/797' cs go* - oZdir FE:u _ o z4 I - o-See) TES r 7 c/A.4,--,e C-d • la, l'oec> Pgr o Lob Ct-e414) c'.1.) ?err SOR .10? DAILY DR ILL ING REPORT 26ell HOLRS A B C 0 L F 0 I DATE WELL RIG DAY NO DEPTH 24HR FTG HEATHER 5-als-Em s=it z2E -z., itglo —op 2 FEN BEDS FUEL WATER A/Fl D BO F 5 WWI '57 SE. 245g 1006 '4;C) C-Z"114- "qteAll*Me_ 3 C LRRENT OPERATIONS - , 4 MLD/WT VIS PV-YP GELS TtVP FL CAKE S PM SAND SOLIDS HT-MP CRLOR RPM 75'F 6 WELL CCST INTANG TANG TOTAL 9950 3 2 zffc 7 DRI.G ASSY BIT NO. 5c4v„dpet x 0/ 4C,1t-3. A .X0, / Cr DP,Ti /S" 2 BIT NO SIZE HAKE TYPE SR NO JETS DEPOLT FTG 6" //P awe-S Pm'ZZ our 2-4 967Z- , 9 FIT NO NT HRS WEIGHT RR! PSI LNR SE SR' GRADE /71 Z.- Car.e/L/ GC?' ersof44/1- le SV NO COMDEP ANC/D1R TVD SECT DISCO EIVCO DLS 4r4. C4 A, mg_ esar..?,;e#84‘c.so,*41*-;4:4) 7940 11 surPARY OF OPERATIONS - c p,rs. $C, Fic.c Pirs Pi,0 4' Af I w Nit CL • G7,0 - /930 Pv.4.4p /00 &. ç ASO/ .4/.. W.c,(As c4- 4 ay /0ae, 73.E7CS /1/4. CC. - Rcygit ctac 19a 0- /14r 7-e S-r. /h/En 75,00.0 "PST • tflic- (7330 1'a'1 Dour Ai VP .1- 4. /.} BidA s - 4-0 o 'F e.. I4ocir (4.7. 1'Z. 86ZS "Di CMG- _ 4,0 Re-rart/evC u.45-402 ileilivf41 "Pr.,4-4._ Af0e.dr,,G AleX.5 Po a.4) 90P.- ,1 1 i Perforation Attachment ADL0028257 Well Date Perf Code MD Top MD Base TVD Top TVD Base S-41AL1 10/18/10 SL 11948 11992 8909 8926 S-41AL1 10/18/10 SL 12300 13655 8995 8912 S-41AL1 10/18/10 OH 13701 15257 8911 8913 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 CO Q] -p• O 1 �..- O O O ��1/ c/ 0 = J J J M M r r N . co N 00 0 0 N 00) O LO OI,- CO U o O O -. 0) v (DCD o N M r- ao �n m U, N O O d N CO - 0 M Tr (0 0) O 0) 0) •— co co co 0 co Q O ~ 0 co c N Q M M (0 M 0) M CO CO N ti EN ai - M M 00 � U) N- 0M � �r) (A O m � MO (,) vrn N In O 2 CD C . r N Q O H 0 M N U 0 co co co co 2 l() l() co 00 o c 1 O c i. 0 0 1 = CO CO J M Cr) r r N N E0 N N r r p I- N- L) - N " N L M 00 N D m C M M N a) O 0 co co 0 0 0, 0 F— 1 L l., 0 Q'0001LL Z IO � CC O Z D Uaacn � H ----D 8Tr,,r37.1 1 .. 00r IIW 4111g5 I +00N0wWW-4N&W-...10+ =ZE I '■ W "Tu*fli:..W221t2gil * '; "... -.L71:Nm917:Vi."688Vgi:b 1 Xi: TWA ,iiP VI al 1..-1171 44 -0 , m T m m ' . w z z O 0--0,0003.0›m000›0 .?.52P,22:12-142gro-5R °"°F1Vgge§geg 7 0e00 0 0 8 8 . a.4...m.,...,..0.-.4.,..0 mooccmmmcmmEmccm 0 4,...... wxxommmwmom,mmmm p -1Em-4-7.1-1-4-1p-4-4mcm-10 S i" 0mr 0 O SC gg . .74-m0 gi A u ppu2P,...-W-281-C6 El a/ 000, (Arttutlo Ng 1 z O '-...17 22i 2r1)itirliAl D--...,-..m,... x Xithrs• r g O".•••=kc■nf'42" 0,0 274-1... 8 0 boc ..t 01 ot, g : ...... &4.. Z W OD o 'IP .11 g :4 , , 06. .t. 6 0 cbv — ofp - 0 ueez.Z. f'.4 '74 6'E's i'. 2-44.14?441 VI -4 a opt 0000-008888 -.888 (Lib 00 _,..,.., ot* 0 ..C. 4 0 2 q f 1 2 1 1 i IRF k *3 g 1 @ 2 g m g N -4 K M • mg. s-a - D W3a.,77:!4 gm '. 5 .. m. F to- =0 ) 'to ° ..-: , 0 - . 8 o -- o 3 c ■ 1 3 . i ) _— -7-- . ::' --- . ._... --, 1 . .._—. . .. 0 g l f STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG III 1 a. Well Status: ®Oil ❑Gas ❑SPLUG ❑Other ❑Abandoned ❑Suspended 1 b. Well Class: 20AAC 25.105 20AAC 25.110 ® Development ❑Exploratory ❑GINJ ❑WINJ ❑WAG ❑WDSPL ❑Other No.of Completions One ❑Service ❑Stratigraphic 2. Operator Name: 5.Date Comp.,Susp.,or Aband.: 12. Permit to Drill Number: BP Exploration(Alaska) Inc. 10/24/2010 210-102 3. Address: 6.Date Spudded: 13. API Number: P.O. Box 196612,Anchorage,Alaska 99519-6612 10/12/2010 50-029-22645-61-00 4a. Location of Well(Governmental Section): 7.Date T.D.Reached: 14. Well Name and Number: Surface: 10/15/2010 PBU S-41AL1 4152' FSL,4504'FEL, SEC.35,T12N, R12E, UM Top of Productive Horizon: 8. KB(ft above MSL): 64.98' 15.Field/Pool(s): 3088'FSL, 1546'FWL, SEC.25,T12N, R12E, UM GL(ft above MSL): 37' Prudhoe Bay Field/Prudhoe Bay b Total Depth: VA klA 3t�a 9.Plug B (MD+TVD): Oil Pool FSL,298'F , SEC.25,T12N, R12E, UM 15257 8913' 4b. Location of Well(State Base Plane Coordinates,NAD 27): 10.Total Depth(MD+TVD): 16. Property Designation: Surface: x- 618930 y- 5980355 Zone- ASP4 15257' 8913' ADL 028257 TPI: x- 624906 y- 5984669 Zone- ASP4 11.SSSV Depth(MD+TVD): 17. Land Use Permit: Total Depth:x- 625499 y- 5982183 Zone- ASP4 N/A 18.Directional Survey: ®Yes ❑No 19.Water depth,if offshore: 20. Thickness of Permafrost(TVD): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1900'(Approx.) 21.Logs Obtained (List,all logs here and submit electronic and printed information per 20 AAC 25.071): 22. Re-Drill/Lateral Top Window MD/TVD: MWD/RES/NEU/DEN/GR _ 11926' 8900' 23. CASING,LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT CASING WT.PER FT. GRADE TOP BOTTOM TOP BOTTOM SIZE CEMENTING RECORD PULLED 20" 91.5# H-40 Surface 80' Surface 80' 30" -260 sx Arctic Set(Approx.) 9-5/8" 40# L-80 34' 3332' 34' 3044' 12-1/4" 1067 sx CS III.272 sx'G'.30 sx CS II 7" 26#/29# L-80 33' 11926' 33' 8900' 8-1/2" 360 sx Class'G'.212 sx'G' 4-1/2" 12.6# L-80 11948' 13701' 8909' 8911' 6" Uncemented Slotted Liner ✓ • 1-p : iy 25-7 24. Open to production or injection? ®Yes ❑No 25. TUBING RECORD If Yes,list each interval open SIZE DEPTH SET(MD) PACKER SET(MD/ND) (MD+TVD of Top&Bottom;Perforation Size and Number): 4-1/2"Slotted Liner 4-1/2", 12.6#, 13Cr85 11962' 11702'/8804' MD ND MD TVD 11948'-11992' 8909'-8926' 26. ACID,FRACTURE,CEMENT SQUEEZE,ETC. 12301'-13656' 8995'-8912' ° ' al DEPTH INTERVAL(MD) AMOUNT AND KIND OF MATERIAL USED I de, ef t 2270' Freeze Protected with 77 Bbls of Diesel 27. PRODUCTION TEST Date First Production: Method of Operation(Flowing,Gas Lift,etc.): November 3,2010 Gas Lift Date of Test: Hours Tested: Production For OIL-BBL: GAS-MCF: WATER-BBL: CHOKE SIZE: GAS-OIL RATIO: 11/03/2010 12 Test Period 4 109 257 43 176 2350 Flow Tubing Casing Press: Calculated OIL-BBL: GAS-MCF: WATER-BBL: OIL GRAVITY-API(CORR): Press. 550 1080 24-Hour Rate♦ 218 513 86 28. CORE DATA Conventional Core(s)Acquired? ❑Yes ®No Sidewall Core(s)Acquired? ❑Yes ®No If Yes to either question,list formations and intervals cored(MD+TVD of top and bottom of each),and summarize lithology and presence of oil,gas or water (submit separate sheets with this form,if needed). Submit detailed descriptions,core chips,photographs and laboratory a 1\/ ,,,,,L/50.071. None DEC 1 0 2010 RBDMS DEC 13 201W Alaska Oil&Gas Colts. Commission Form 10-407 Revised 12/2009 CONTINUED ON REVERSE lll9mit Original Only /L•i3 •lo (j 29. GEQLOGIC MARKERS(List all formations and mark--encountered): 30. FfRMATION TESTS NAME MD ND Well Tested? ❑ ®No permafrost Top If yes,list intervals and formations tested,briefly summarizing test Permafrost Base results. Attach separate sheets to this form,if needed,and submit detailed test information per 20 AAC 25.071. Top Shublik A 12004' 8930' None Top Shublik B 1 12226' 8987' Top Shublik B 2 12396' 8985' Top Shublik A(Invert) 12679' 8937' Formation at Total Depth(Name): Shublik 15257' 8913' 31.List of Attachments: Summary of Daily Drilling Reports,Well History,Well Schematic Diagram,Surveys and Leak-Off test summary. 32.I hereby certify that the foregoing is true and correct to the best of my knowledge. ff Signed: Sondra St- � Title Drilling Technologist Date: I a PBU S-41AL1 210-102 Prepared By Name/Number Sondra Stewman, 564-4750 Well Number Permit No./Approval No. Drilling Engineer: Mel Rixse, 564-5620 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. Submit a well schematic diagram with each 10-407 well completion report and 10-404 well sundry report when the downhole well design is changed. Item 1 a: 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 and Ground Level elevation in feet above mean sea level. 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: Report true vertical thickness of permafrost in Box 20. Provide MD and ND for the top and base of permafrost in Box 28. Item 23: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 24: 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 27: Method of Operation: Flowing,Gas Lift,Rod Pump,Hydraulic Pump,Submersible,Water Injection,Gas Injection,Shut-In,or Other(explain). Item 28: Provide a listing of intervals cored and the corresponding formations,and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. Item 30: Provide a listing of intervals tested and the corresponding formation,and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 12/2009 Submit Original Only TREE= 41/16"CNV -4 SAFETY a.,.,ES: CHROMETBG&LNR .WELLHEAD= FMC ACTUATOR= BAKER KB.ELEV= 71.2' A L 1 BF.ELEV= 37 - KOP= 1131' DRLG DRAFT Max Angle= _ 98 @ 14925' I I 2226' 4-1/2"HES X Nipple,ID=3.813" 1 Datum MD= 11843' Datum ND= 8800'SS GAS LIFT MANDRELS ' ST MD ND DEV TYPE VLV LTCH PORT DATE 9-5/8"CSG,40#,L-80,ID=8.835" —I 3332' —A 5 3742 3331 48 KBG-2 DOME BK 16 10/24/10 4 7112 5568 47 KBG-2 SO BK r 20 10/24/10 El 3 9705 7345 47 KBG-2 DMY BK r 0 10/20/10 2 11639 8777 65 KBG-2 DMY BK r 0 10/20/10 1 11807 8849_ 64 KBG-2 DMY BK r 0 10/20/10 Minimum ID = 3.725" @ 11915' 4-112" HES XN NIPPLE 7"CSG 26#X 7"CSG 29#xo H 11371' X K ' I I 11672' H4-1/2"HES X NIPPLE,9CR,ID=3.813" 11702' j--I 7"X 4-1/2" HES TNT PKR, ID=3.856" RA PIP TAG I-I 11782' I • 1 1 11778' H4-1/2"HES X NIPPLE,9CR,ID=3.813" I m + 11842' I-I4-1/2"BAKER SLIDING SLEEVE,ID=3.813" I 7"CSG WINDOW 11892'- 11905' (S-41 L1) SQUEEZED OFF 9/22/2010 7"CSG WINDOW 11926'- 11939'(S-41A-L1) LECHANICAL CUT SLOTTED LINER 10/17/2010 H 11947' i ..---. 3 `_ _00 i S / •AL ( ,i I 11915' H4-1/2"HES XN NIPPLE,9CR,ID=3.725" L4-1/2"SLOTTED LINER 12.6#, L-80 ID=3.985" H 13701' I \ 11950' —I4-1/2"BAKER SEAL ASSEMBLY ( Fe uk 4-1/2"TBG,12.6#,13-Cr 85,.0152bpf, ID=3.958" I 11962' 11954' 5"X 7"HRD ZXPN LTP W/11.79'X 5.25"PBR I 11976' -J5"X 7"FLEXLOCK LINER HANGER 7"CSG,29#,L-80,.0371 bpf,ID=6.184" I—I 124.09' PERFORATION SUMMARY REF LOG:MWD 11976' —IRA PIP TAG I ANGLE AT TOP PERF:86° Note:Refer to Production DB for historical perf data SIZE I SPF INTERVAL Opn/Sqz DATE S-41 AL1 SLTD LNR 11948- 13701 0 09/30/10 ' ° .(X S-41A i I 4 3" 6 14200- 14350 0 10/09/10 , 3" 6 14940- 15150 0 10/09/10 A I I , 3" 6 13700- 14100 0 10/09/10 I I PBTD I-J 15326' I 3" 6 13200- 13600 0 10/09/10 3" 6 12700-13100 0 10/09/10 4-1/2"Solid LNR,12.6#,13-Cr 85,ID=3.958" 15413' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04/02/96 ORIGINAL COMPLETION WELL: S-41A&AU 10/23/10 N7ES SDTRCK/LAT(S-41A/AL1) PERMIT No: 21 0101 0/2101020 ' API No: 50-029-22645-01 /-61-00 SEC 35,T12N,R12E,4152'FSL&4504'FEL BP Exploration(Alaska) North America -ALASKA- BP Page 1 of 1 Operation Summary Report Common Well Name:S-41 1 AFE No Event Type: MOBILIZATION(MOB) Start Date:9/3/2010 End Date:9/6/2010 X3-00W9R-C(835,325.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 9/3/2010 00:00 - 07:00 7.00 RIGD P PRE R/D FLOOR PREP TO LOWER DERRICK, SECURE&DISCONNECT PITS,MOVE PITS OUT OF SUB CRITICAL PATH,BRIDLE UP& LAY OVER DERRICK,PREP SUB TO MOVE 07:00 - 00:00 17.00 MOB P PRE MOVE RIG OFF DS-5 AND BEGIN JOURNEY TO S PAD.SUB 1/4 MILE FROM FRONTIER CORNER AT MIDNIGHT, 9/4/2010 00:00 - 02:00 2.00 MOB P PRE RIGHT AFTER THE FIRST TURN AT FRONTIER CORNER,ALONG SIDE LAKE AFRICA,SUB PUNCHED THROUGH SPINE RD WITH ALL TIRES. 02:00 - 08:00 6.00 MOB N SFAL PRE SECURE DUNNAGE TO PUT UNDER WHEELS, JACK RIG UP AND CONTINUALLY ADD DUNNAGE. 08:00 - 09:30 1.50 MOB P PRE MOVE SUB ANOTHER MILE DOWN THE ROAD BEFORE TIRES BROKE THROUGH AGAIN 09:30 - 12:30 3.00 MOB N SFAL PRE SECURE DUNNAGE TO PUT UNDER WHEELS, JACK RIG UP AND CONTINUALLY ADD DUNNAGE TO FREE SUB 18:00 - 00:00 6.00 MOB P PRE MOVE SUB FROM LAKE AFRICA TO J-PAD. LEAP FROG MATS 9/5/2010 00:00 - 01:30 1.50 MOB P PRE CONTINUE TO MOVE SUB FROM LAKE AFRICA TO J-PAD WHILE LEAP FROGGING MATS 01:30 - 02:00 0.50 MOB P PRE MOVE SUB FROM J-PAD TO BALL MILL WITHOUT RIG MATS 02:00 - 09:00 7.00 MOB P PRE STAGE SUB AT BALL MILL AND STAGE RIG MATS AT VARIOUS SPOTS ALONG ROAD 09:00 - 15:00 6.00 MOB P PRE MOVE SUB FROM BALL MILL TO S PAD AND STAGE ON S-PAD 15:00 - 00:00 9.00 MOB P PRE MOVE PITS,SHOP AND CAMP FROM DS 05 TO S PAD. INSPECT GERTS AND LOAD BEARING BEAMS ON SUB. PJSM WITH LITTLE RED. PRESSURE TEST LINES TO 2500 PSI AND PRESSURE TEST OA TO 2000 PSI FOR 30 MIN. LOST 60 PSI IN THE FIRST 60 MIN AND 30 PSI IN THE SECOND 15 MIN. 9/6/2010 00:00 - 02:30 2.50 MOB P PRE CONTINUE TO MOVE PITS,CAMP AND SHOP FROM DS 5 TO S PAD. HANG TREE IN CELLAR, LAY RIG MATS AND HERCULITE AROUND WELL,STAGE WELL HEAD EQUIPMENT IN CELLAR 02:30 - 04:00 1.50 MOB P PRE SPOT SATELLITE CAMP,SHOP AND STAGE PITS 04:00 - 06:00 2.00 MOB P PRE SPOT SUB AND PITS OVER S-41A 06:00 - 08:30 2.50 MOB P PRE CONNECT SERVICE LINES AND ELECTRICAL LINES TO PITS,CAMP,SHOP,BERM SUB AND PITS. SPOT CUTTINGS TANK 08:30 - 09:30 1.00 MOB P PRE PJSM,RAISE DERRICK,PIN DERRICK, CATTLE SHOOT 09:30 - 12:00 2.50 MOB P PRE PJSM, BRIDLE DOWN,RU RIG FLOOR,RU TIGER TANK,RU SECONDARY ANNULUS VALVES. RIG ACCEPTED AT 1200 HRS 12:00 - 13:00 1.00 RIGU P PRE RU LINES TO TUBING AND IA. RU CELLAR. 13:00 - 13:30 0.50 RIGU P PRE PRE-SPUD MEETING. Printed 12/9/2010 2:03:50PM North America-ALASKA-BP Page 1 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) _ Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 9/6/2010 13:30 - 16:00 2.50 WHSUR P DECOMP PJSM WITH DSM. RU LUBRICATOR AND TEST TO 250 PSI LOW AND 3500 PSI HIGH. PULL BPV. RIG DOWN DSM. 16:00 - 19:00 3.00 WHSUR P DECOMP PJSM, RU CIRCULATING LINES. REVERSE CIRCULATE 49 BBLS AT 4 BPM AND 600 PSI. CIRCULATE DOWN THE TUBING 39 BBLS. CIRCULATE BARAKEEN SOAP PILL SURFACE TO SURFACE AT 5 BPM AND 840 PSI.RD AND BLOW DOWN LINES 19:00 - 22:00 3.00 WHSUR P DECOMP DRY ROD IN TWC AND TEST FROM ABOVE TO 3500 PSI AND BELOW TO 1000 PSI FOR 5 MIN. RD AND BLOW DOWN LINES 22:00 - 23:30 1.50 WHSUR P DECOMP PJSM,BLEED CONTROL LINES AND NU TREE AND ADAPTER FLANGE 23:30 - 00:00 0.50 WHSUR P DECOMP THREADS ON HANGER ARE ROLLED. UNABLE TO MAKE UP CROSSOVER. PJSM, NU BOPE 9/7/2010 00:00 - 03:30 3.50 BOPSUR ` P DECOMP PJSM,NU BOPE, INSTALL TURNBUCKLES AND RISER. 03:30 - 04:00 0.50 BOPSUR P DECOMP RU TO TEST BOPE. 04:00 - 04:30 0.50 BOPSUR N WAIT DECOMP WAIT ON ARRIVAL OF 4-1/2"DONUT TEST JT. 04:30 - 06:00 1.50 BOPSUR P DECOMP RU 4-1/2"DONUT TEST JT AND REMAINING TEST EQUIPMENT. 06:00 - 11:30 5.50 BOPSUR P DECOMP TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 3,500 PSI HIGH WITH 4-1/2" TEST JOINT. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4-1/2"TEST JOINT. -ALL TESTS GOOD. AOGCC REP JEFF JONES WAIVED WITNESS TO THE TEST ON 09/05/2010. TEST WITNESSED BY BP WSLS RYAN CIOLKOSZ AND DAVE NEWLON AND NAD TOOLPUSHERS LARRY WURDEMAN AND LENWARD TOUSSANT. 11:30 - 12:00 0.50 BOPSUR P DECOMP RD/BD TEST EQUIPMENT. 12:00 - 15:30 3.50 WHSUR P DECOMP RU DSM AND LUBRICATOR EXTENSION. -TEST TO 250 PSI LOW AND 3,500 PSI HIGH; TEST GOOD. -PULL TWC. 15:30 - 16:30 1.00 PULL P DECOMP 4-1/2"TUBING HANGER SPEARING AND LD OPERATION. -PJSM WITH ALL INVOLVED HANDS FOR TUBING HANGER SPEARING AND LD OPERATION. -MU SPEAR. -RIH AND ENGAGE SPEAR IN TUBING HANGER. -BOLDS. -UNSEAT TUBING HANGER WITH PU WT 150K. -PULL TUBING HANGER TO RIG FLOOR. -LD SPEAR AND TUBING HANGER. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 2 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:30 - 17:00 0.50 PULL P DECOMP UNANNOUNCED H2S AND RIG EVACUATION FULL MUSTER DRILL. -ALL RIG AND SERVICE COMPANY PERSONNEL ACCOUNTED FOR. -DISCUSSED FACT WITH ALL INVOLVED THAT S PAD IS AN H2S PAD AND THAT WE ARE TO STAY OUT OF THE WELL HOUSES. -WE ALSO DISCUSSED THE FACT THAT EVERYONE BESIDES THE DRILLER AND A DESIGNATED FLOOR HAND IMMEDIATELY EVACUATES THE RIG AND ASSEMBLES AT THE MUSTER POINT AND THAT THESE TWO INDIVIDUALS DON SCBA AND SECURE THE WELL BEFORE EVACUATING THE RIG. 17:00 - 19:00 2.00 PULL P DECOMP RU TO CIRCULATE. -PUMP 25-BBL BARAKLEAN SOAP PILL. -CIRCULATE SURFACE TO SURFACE. -252 GPM,620 PSI,443 BBLS PUMPED. -MONITORED WELL FOR 20 MINUTES;WELL STATIC. -RD AND BD LINES. 19:00 - 00:00 5.00 PULL P DECOMP POH AND LD 4-1/2", 12.6#,L-80 TUBING FROM 11,308'TO 6,389'. 9/8/2010 00:00 - 05:00 5.00 PULL P DECOMP POH AND LD 4-1/2",12.6#,L-80 TUBING FROM 6,389'TO SURFACE. -RECOVERED 266 FULL JTS,49 SS BANDS,6 GLMS,1 SSSV AND ASSOCIATED CONTROL LINES,AND 1 CUT JT(18.73')WITH X NIPPLE. -TUBING CUT LEFT 1.8'STUMP LOOKING UP ABOVE PACKER. 05:00 - 06:00 1.00 BOPSUR P DECOMP MONITOR WELL;WELL STATIC. -RU BOPE TEST EQUIPMENT. -CLEAN AND CLEAR RIG FLOOR. 06:00 - 06:30 0.50 BOPSUR P DECOMP CONTINUE RU TEST EQUIPMENT AND PU 4" TEST JT. 06:30 - 08:30 2.00 BOPSUR P DECOMP TEST BOPE WITH 4"TEST JT. -TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH;TESTS GOOD. -TEST BOTTOM AND TOP PIPE RAMS TO 250 PSI LOW AND 3,500 PSI HIGH;TESTS GOOD. 08:30 - 09:00 0.50 FISH P DECOMP INSTALL WEAR RING. 09:00 - 12:00 3.00 FISH P DECOMP PU BAKER PACKER MILLING BHA TO 322'. -MILLING BHA CONSISTS OF: 12:00 - 14:30 2.50 FISH P DECOMP RIH WITH MILLING BHA ON 4"DP SINGLES FROM THE PIPESHED FROM 322'TO 3,200'. -FILL PIPE EVERY 30 STANDS. Printed 12/9/2010 2:04:20PM North America -ALASKA-BP Page 3 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 14:30 - 18:00 3.50 FISH N RREP 3,200.00 DECOMP EVACUATED RIG DUE TO H2S HIGH-LEVEL ALARM. -WHILE FILLING PIPE,WE ENCOUNTERED A HIGH-LEVEL H2S ALARM;MONITOR ABOVE SHALE SHAKERS REGISTERED 100 PPM. -DRILLER AND FLOOR HAND#1 DONNED SCBA AND SECURED THE WELL BY SHUTTING IT IN WHILE ALL OTHER RIG AND THIRD-PARTY PERSONNEL ON THE RIG AND ON THE PAD MUSTERED IN THE SHOP,OUR SAFE-BRIEFING AREA. -ON TWO OCCASIONS SEPARATED BY 30 MINUTES,DRILLER AND SECOND RIG HAND USED HAND-HELD MONITORS/RADIOS TO CHECK THE RIG FOR PRESENCE OF H2S; NO GAS WAS ENCOUNTERED. -REMOVE AND REPLACE MONITOR OVER SHALE SHAKERS AS A PRECAUTIONARY MEASURE AND RETEST/RECALIBRATE ALL PERMANENT MONITORS ON RIG. -SEE TRACTION 2010-IR-3612780 FOR FURTHER DETAILS. 18:00 - 18:30 0.50 FISH N RREP 3,200.00 DECOMP AFTER VERIFYING SIDP AND SICP WERE ZERO PSI,OPENED ANNULAR PREVENTER. -MONITORED WELL;WELL STATIC. -CBU--69 BBLS,250 GPM,490 PSI. -MONITORED WELL;WELL STATIC. 18:30 - 00:00 5.50 FISH P DECOMP RIH WITH MILLING BHA ON 4"DP SINGLES FROM THE PIPESHED FROM 3,200'TO 11,311'. -FILL PIPE EVERY 30 STANDS. -TAG 4-1/2"TUBING STUMP AT 11,311'. -PU WT 180K,SO WT 137K. -MW 8.5 PPG NACL BRINE IN AND OUT. 9/9/2010 00:00 - 01:00 1.00 FISH P DECOMP CIRCULATE SURFACE TO SURFACE. -PUMP 40-BBL EP MUD LUBE PILL. -377 BBLS,410 GPM,2,450 PSI. -SHUT-IN WELL AFTER CIRCULATING AND PUMPED THROUGH CHOKE TO FILL LINES AND POORBOY DEGASSER AND ENSURE ABILITY TO CIRCULATENERIFY VALVE ALIGNMENT BEFORE COMMENCING PACKER MILLING OPERATION. 01:00 - 06:00 5.00 FISH P DECOMP PACKER MILLING OPERATION. -170 GPM,470 PSI--OFF BOTTOM. -132 GPM,340 PSI--ON BOTTOM. -60 RPM. -4K TQ OFF,4-8K TQ ON. -PUWT175K,SOWT140K, ROT WT160K. -10-15K WOB. -AFTER MILLING THROUGH PACKER ELEMENTS, EXPERIENCED 56-BBUHR LOSS RATE. -CONTINUE MILLING THROUGH BOTTOM SLIPS,BUT UNABLE TO VERIFY SLIPS RELEASE. Printed 12/9/2010 2:04:20PM North America ALASKA- BP Page 4 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 08:00 2.00 FISH P DECOMP BULLHEAD 75 BBLS DOWN IA TO FLUSH JUNK AROUND PACKER. -170 GPM,2,000 PSI ICP,2,020 PSI FCP. -MONITOR WELL;STATIC LOSS RATE 60 BBLS/HR. -RIH TO VERIFY THAT PACKER DID NOT MOVE DOWNHOLE WHILE BULLHEADING; PACKER DID NOT MOVE. 08:00 - 09:00 1.00 FISH P DECOMP SPOT 45-BBL LCM PILL AT 11,318'. -160 GPM,440 PSI. -MONITOR WELL;WELL STATIC. 09:00 - 12:00 3.00 P DECOMP POH WITH PACKER MILLING BHA FROM ® 11,318'TO PU WT 9 5K,SOSOWT90K. 12:00 - 14:00 2.00 FISH P DECOMP POH WITH PACKER MILLING BHA FROM 3,800' TO 322'. -MONITOR WELL;LOSS RATE REDUCE TO 3-5 BBUHR. 14:00 - 15:30 1.50 FISH P DECOMP LD PACKER MILLING BHA FROM 322'TO SURFACE. -HOLD PJSM. -RB 3 STANDS OF DCS. -LD BOOT BASKETS;BASKETS BROUGHT UP PACKER SHAVINGS AND 1 SS BAND. -CLEAN AND CLEAR RIG FLOOR. 15:30 - 16:30 1.00 FISH P DECOMP PU PACKER FISH SPEAR BHA TO 319'. 16:30 - 20:00 3.50 FISH P DECOMP RIH WITH PACKER FISH SPEAR BHA FROM 319'TO 11,229'. -WASH DOWN AT 3 BPM,360 PSI. -TAG FISH AT 11,316'. -PU WT 180K,SO WT 143K. -ENGAGED FISH AND SAW 100 PSI INCREASE IN PUMP PRESSURE. -PU TO 225K AND JAR LOOSE. -VERIFY FISH ON WITH SAME PUMP PRESSURE AS AFTER ENGAGING INTO FISH. 20:00 - 21:00 1.00 FISH P DECOMP CBU AFTER DROPPING 1-7/8"DART. -OPEN PUMP-OUT SUB AT 1,900 PSI. -255 BBLS,8 BPM,1,360 PSI. -MONITOR WELL AFTER CBU;STATIC LOSS RATE 35 BBUHR. 21:00 - 00:00 3.00 FISH P DECOMP POH WITH PACKER FISH SPEAR BHA AND FISH FROM 11,318'TO 6,620'. -PUWT122K. 9/10/2010 00:00 - 02:30 2.50 FISH P DECOMP POH WITH PACKER FISH SPEAR BHA FROM 6,620'TO 319'. -MONITOR WELL;STATIC LOSS RATE 40 BBUHR. 02:30 - 06:00 3.50 FISH P DECOMP LD PACKER FISH SPEAR BHA TO SURFACE. -PJSM. -LD BHA. -RU TO LD FISH. -PUNCH TUBING ON FISH UNDER XN NIPPLE; TAILPIPE FULL OF SCALE. -BREAK OUT AND LD FISH. -RECOVER BAKER S-3 PACKER BODY AND TAIL PIPE ASSEMBLY. -RD TUBULAR HANDLING EQUIPMENT. -CLEAN AND CLEAR RIG FLOOR. Printed 12/9/2010 2:04:20PM North America ALASKA BP Page 5 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site:PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 07:30 1.50 FISH N WAIT DECOMP WAITING ON ORDERS FROM ANCHORAGE LEADERSHIP. -SERVICE TOP DRIVE. 07:30 - 08:30 1.00 CLEAN C DECOMP PU 7"CLEAN-OUT BHA TO 318'. 08:30 - 12:00 3.50 CLEAN C DECOMP RIH WITH 7"CLEAN-OUT BHA FROM 318'TO 10,475'. -FILL PIPE EVERY 30 STANDS. -PU WT 172K,SO WT 140K. 12:00 - 12:30 0.50 CLEAN C DECOMP RIH WITH 7"CLEAN-OUT ASSEMBLY FROM 10,475'TO 11,227'. -BREAK CIRCULATION AND ESTABLISH DRILLING PARAMETERS/SPRS AT 11,227'. -WASH DOWN FROM 11,227'TO 11,365';TAG SCALE AT 11,365'. -5 BPM,665 PSI. -80 RPM. -3.5K TQ. -MW 8.4 PPG IN AND OUT. -PU WT 175K,SO WT 145K,ROT WT 160K. 12:30 - 22:00 9.50 CLEAN C DECOMP DRILL SCALE FROM 11,365'TO 11,906'. -DRILLING BREAK AT 11,906';SUSPECT THAT WE STARTED TO DRILL BOTTOM PACKER AND DECIDED TO TRIP FOR PACKER MILLING BHA. -5 BPM,670 PSI. -80 RPM. -3-5K TQ. -5-7K WOB. -PU WT 180K,SO WT 147K,ROT WT 160K. -UTILIZE HI-VIS SWEEPS;SWEEPS BRINGING BACK HEAVY SCALE AND PARAFFIN. -MW 8.5 PPG IN AND OUT. -MONITOR WELL BEFORE POH;30 BBUHR STATIC LOSS RATE. 22:00 - 00:00 2.00 CLEAN C DECOMP CIRCULATE 20-BBL HI-VIS SWEEP SURFACE TO SURFACE AND SPOT 40-BBL LCM PILL AFTER SEEING SWEEP BACK AT SURFACE. -577 BBLS,8 BPM,1,335 PSI. -SEE HEAVY SCALE WITH SWEEP. 9/11/2010 00:00 - 05:00 5.00 CLEAN C ._ DECOMP POH WITH 7"CLEAN-OUT BHA FROM 11,906' TO 318'. 05:00 - 05:30 0.50 CLEAN C -_ DECOMP LD 7"CLEAN-OUT BHA FROM 318'TO SURFACE. 05:30 - 06:30 1.00 FISH P DECOMP PU BOTTOM PACKER MILLING BHA TO 359'. 06:30 - 11:00 4.50 FISH P ■- DECOMP RIH WITH BOTTOM PACKER MILLING BHA FROM 359'TO 11,644'. -BREAK CIRCULATION EVERY 3,000'. 11:00 - 12:00 1.00 FISH P ■- DECOMP CUT AND SLIP OC , LINE -SERVICE CROWN,BLOCKS,AND AND D DRAWWORKS. Printed 12/9/2010 2:04:20PM North America ALASKA-BP Page 6 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site:PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft 12:00 - 13:00 1.00 FISH P DECOMP BREAK CIRCULATION AND ESTABLISH PARAMETERS. -CIRCULATE SURFACE TO SURFACE;448 BBLS,245 GPM,745 PSI. -SPR @11,644'/8,762'TVD #1 @2 BPM= 160 PSI/ 3 BPM=285 PSI, #2 @ 2 BPM= 160 PSI/3 BPM=280 PSI -PUWT=185K/SOWT=145K/ROT WT= 162K. -MW 8.4 PPG IN AND OUT. 13:00 - 17:30 4.50 FISH P DECOMP REAM IN THE HOLE AND TAG TOP OF BOTTOM PACKER AT 11,906'MD. MILL PACKER -4 BPM=560 PSI ON,445 PSI OFF. -60 RPM -5.5K TQ OFF; 8-10.5K TQ ON. PUWT=185K/SOWT=145K/ROT WT= 162K. -PUMP 2 HIGH-VIS(100+SEC)SWEEPS DURING MILLING OPS AND 1 EP MUD LUBE PILL. MILL FROM 11,906'-11,912';AT 11,912'MD, STALLED PIPE AND PU PULLING 25K OVER; PU WT INCREASED 10K,SUSPECT TAIL PIPE WEDGED INTO WASHOVER PIPE. -PICKUP ABOVE UPPER LATERAL TO 11,860' MD. 17:30 - 18:00 0.50 FISH P DECOMP BULLHEAD 103 BBLS AT 6 BPM. -ICP AT 6 BPM=2,060 PSI. -FCP AT 6 BPM=1,920 PSI. FLOW CHECK WELL;WELL STATIC--NO FLOW. -OPEN WELL,LOSING FLUID AT 15 BPH. 18:00 - 19:30 1.50 FISH P DECOMP CBU. -335 BBLS,6 BPM,800 PSI. -LOSSES INCREASED TO 40 BPH. -MONITOR WELL,LOSING FLUID,MW 8.4 PPG IN/OUT 19:30 00:00 4.50 FISH P ■- DECOMP F T WITH BO PACKER MILLING BHA FROM 11,860'TO O 3,650'. -LOSS RATE AT 30-40 BPH. 9/12/2010 00:00 - 03:00 3.00 FISH P ■- DECOMP POH WITH BOTTOM PACKER MILL FROM 3,650'TO 350'. -15K OVERPULL AT 2,417'. 03:00 - 04:30 1.50 FISH P ■- DECOMP N BOTTOM PACKER MILL BHA FROM -NO FISH,BUT BOTTOM PACKER PIECES STUCK INSIDE OF WASH PIPE. 04:30 - 05:30 1.00 FISH P ■- DECOMP R NS,SCALE,AND PACKER REMNANTS FROM BOOT BASKETS. -CLEAN AND CLEAR RIG FLOOR. 05:30 - 06:30 1.00 FISH C -_ DECOMP PU/MU BOTTOM PACKER SPEAR BHA TO 319'. 06:30 11:30 5.00 FISH C ■- DECOMP WITH BOTTOM PACKER SPEAR BHA FROM 319'TO 11,875'. -PU WT 180K,SO WT 145K. 11:30 - 12:30 1.00 FISH C -_ DECOMP CBU. -270 BBLS,330 GPM,1,950 PSI. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 7 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site:PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:30 - 13:30 1.00 FISH C DECOMP WASH DOWN FROM 11,875'TO 11,910'. -3.5 BPM,450 PSI. -TAG FISH AT 11,910';SEE 150 PSI INCREASE. -PU AND SEE 35K OVERPULL. -JAR FISH FREE;HAVE POSITIVE INDICATION FISH ON WITH HIGHER PUMP PRESSURE. 13:30 - 14:30 1.00 FISH C DECOMP PU TO 11,850'AND DROP DART TO OPEN PUMP-OUT SUB. -PUMP-OUT SUB OPENED WITH 1,965 PSI. -CIRCULATE 375 BBLS,8 BPM,1,450 PSI. -MONITOR WELL;SOME GAS BREAK-OUT IN BELL NIPPLE;NO INCREASE IN FLOW. 14:30 - 15:30 1.00 FISH C DECOMP ATTEMPT TO BULLHEAD 104 BBLS TO FLUSH AROUND FISH;UNSUCCESSFUL. -PRESSURE UP TO 2,000 PSI AND HELD WITHOUT BLEED OFF. -BLED OFF AND PUSHED FISH TO 11,905'. -MONITOR WELL;40 BPH STATIC LOSS RATE. -WORK PIPE AND PU TO 11,850'. -ATTEMPT A SECOND TIME TO BULLHEAD; PRESSURED UP AGAIN TO 2,000 PSI AND HELD WITHOUT BLEED OFF. -BLED OFF AND RIH TO 11,906'. 15:30 - 16:00 0.50 FISH C DECOMP CONSULT WITH ANCHORAGE RIG TEAM. -MONITOR WELL;42 BPH STATIC LOSS RATE. 16:00 - 17:00 1.00 FISH C I DECOMP RIH TO RELEASE FROM BOTTOM PACKER. -CHASE PACKER TO 11,920'WITH SO WT 50K. -10 TURNS TO RIGHT;WORKED TQ DOWN; FISH RELEASED. 17:00 - 18:00 1.00 FISH C DECOMP POH WITH BOTTOM PACKER SPEAR BHA TO 11,848'AND CBU. -6 BPM,830 PSI. -SPOT HI-VIS PILL AT 11,848'. -MONITOR WELL;38 BPH STATIC LOSS RATE. -8.4 PPG MW IN AND OUT. 18:00 - 23:00 5.00 FISH C DECOMP POH WITH BOTTOM PACKER SPEAR BHA FROM 11,848'TO 319'. -PU WT 192K,SO WT 140K. -MONITOR WELL;40 BPH STATIC LOSS RATE. -8.4 PPG MW IN AND OUT. 23:00 - 00:00 1.00 FISH C DECOMP LD BOTTOM PACKER SPEAR BHA FROM 319'. 9/13/2010 00:00 - 01:30 1.50 FISH C DECOMP PU/MU BOTTOM PACKER MILLING BHA TO 359'. 01:30 - 05:30 4.00 FISH C DECOMP RIH WITH BOTTOM PACKER MILLING BHA TO 11,906'. 05:30 - 07:00 1.50 FISH C DECOMP ESTABLISH PARAMETERS AND CIRCULATE SURFACE TO SURFACE AT 11,906'. -397 BBLS,330 GPM,1,287 PSI. -PU WT 185K,SO WT 145K. -8.4 PPG MW IN AND OUT. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 8 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site:PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 07:00 - 11:00 4.00 FISH C DECOMP MILL BOTTOM PACKER. -RIH AND TAG TOP OF FISH AT 11,916'. -5K TQ OFF,8-11K TQ ON. -168 GPM,450 PSI. -PU WT 185K,SO WT 140K,ROT WT 160K. -MW 8.4 PPG IN AND OUT. -MILLED DOWN TO 11,918'AND THEN UNABLE TO MILL. -ATTEMPT TO WEDGE FISH IN BURN SHOE; UNSUCCESSFUL. -ATTEMPT TO MILL DOWN AGAIN; UNSUCCESSFUL. 11:00 - 16:00 5.00 FISH C DECOMP POH WITH BOTTOM PACKER MILL FROM 11,918'TO 359'. -MONITOR WELL;28 BPH STATIC LOSS RATE. 16:00 - 17:30 1.50 FISH C DECOMP LD BOTTOM PACKER MILL BHA FROM 359'. -RECOVERED HEAVY PARAFFIN AND PACKER SHAVINGS FROM BOOT BASKETS. -CLEAN AND CLEAR RIG FLOOR. 17:30 - 18:30 1.00 FISH C DECOMP PU PACKER SPEAR BHA TO 319'. 18:30 - 22:30 4.00 FISH C DECOMP RIH WITH PACKER SPEAR BHA FROM 319'TO 11,875'. -PU WT 185K,SO WT 145K. 22:30 - 00:00 1.50 FISH C DECOMP CIRCULATE. -PUMP 100-BBL,140 DEGREE F BARAKLEAN SOAP PILL; LET SOAK FOR 30 MINUTES. -FLUSH PIPE WITH 155-BBL 8.4 PPG NACL BRINE. -6 BPM,1,160 PSI. 9/14/2010 00:00 - 00:30 0.50 FISH C DECOMP CIRCULATE BARAKLEAN SOAP PILL OUT OF THE HOLE. -155 BBLS,306 GPM,1,640 PSI. 00:30 - 02:00 1.50 FISH C DECOMP RIH FROM 11,875'TO 11,916'. -ENGAGE BOTTOM PACKER FISH;POSITIVE PRESSURE INDICATION THAT FISH WAS ON. -PUSH FISH TO BOTTOM AT 12,209' -PU WT 185K,SO WT 145K. 02:00 - 02:30 0.50 FISH C DECOMP POH WITH BOTTOM PACKER FISH FROM 12,209'TO 11,850'. 02:30 - 03:00 0.50 FISH C DECOMP CLOSE ANNULAR PREVENTER AND BULLHEAD DOWN IA. -75 BBLS,5 BPM,2,015 PSI. 03:00 - 04:30 1.50 FISH C DECOMP CBU. -DROP DART AND OPEN PUMP-OUT SUB AT 1,896 PSI. -330 GPM,1,220 PSI. -MONITOR WELL;35 BPH STATIC LOSS RATE. 04:30 - 10:30 6.00 FISH C DECOMP POH WITH PACKER SPEAR BHA FROM 11,793' TO 319'. -PU WT 160K,SO WT 120K. 10:30 - 11:30 1.00 FISH C DECOMP LD PACKER SPEAR BHA AND FISH FROM 319'. -RECOVERED MILLED UP BAKER ML PACKER REMNANTS,4-1/2"XO PUP JT,4-1/2"PUP JT, 4-1/2"XN NIPPLE,4-1/2"PUP JT,AND 4-1/2" WLEG. 11:30 - 12:00 0.50 FISH C DECOMP CLEAN AND CLEAR RIG FLOOR. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 9 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:00 - 13:00 1.00 BOPSUR P -_ DECOMP PULL WEAR BUSHING AND SET TEST PLUG. -RU TEST EQUIPMENT. 13:00 - 17:30 4.50 BOPSUR P DECOMP TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 3,500 PSI HIGH WITH 4"AND 4-1/2"TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4"TEST JOINT. -ALL TESTS GOOD. AOGCC REP CHUCK SCHEVE WAIVED WITNESS TO THE TEST ON 09/12/2010. TEST WITNESSED BY BP WSL DICK MASKELL AND NAD TOOLPUSHER CHRIS WEAVER. 17:30 - 18:30 1.00 BOPSUR P - DECOMP RD TEST EQUIPMENT AND LINES,PULL TEST PLUG,AND INSTALL WEAR BUSHING. 18:30 - 22:00 3.50 CLEAN P DECOMP PU 7"CLEAN-OUT AND SCRAPER BHA TO 444'. -HOT SHOT OUT NECESSARY CROSSOVERS TO RUN 7"CASING SCRAPER TO 100'ABOVE 7"CASING WINDOW. -SERVICE TOP DRIVE. -MONITOR WELL;26 BPH STATIC LOSS RATE. 22:00 - 00:00 2.00 CLEAN P DECOMP RIH WITH 7"CLEAN-OUT AND SCRAPER BHA FROM 444'TO 5,334'. -PU WT 95K,SO WT 90K. 9/15/2010 00:00 - 04:30 4.50 CLEAN P DECOMP RIH AND DRILL DOWN WITH 7" CLEAN-OUT/SCRAPER BHA TO 11,939'. -225 GPM,815 PSI. -45 RPM. -6.5K TQ ON. -DRILLING COMMENCED AT 11,934'AND WAS VERY SLOW TO 11,939';ALL INDICATIONS POINT TO DRILLING MORE HEAVY SCALE. -AFTER FIRST BU,SHUT DOWN PUMPS AND SAW GAS BREAKING OUT VIGOROUSLY AT SURFACE;MONITORED WELL;WELL WAS STILL LOSING FLUID, BUT VIGOROUS GAS BREAK-OUT DID NOT SUBSIDE;DECISION MADE BY NIGHT WSL AND TOURPUSHER TO SHUT IN THE WELL;PROPER NOTIFICATIONS MADE(TRACTION 2010-IR-3618028). -8.4 PPG MW IN AND OUT. 04:30 - 06:30 2.00 CLEAN N DPRB 11,939.00 DECOMP CBU THROUGH SUPER CHOKE TO POOR-BOY DEGASSER. -SICP AND SIDPP 0 PSI. -3 BPM,280 PSI(SAME AS SPR TAKEN BEFORE SHUTTING WELL IN). -AFTER CIRCULATION,CHECKED FOR FLOW FROM CHOKE;THERE WAS NONE. -OPENED ANNULAR PREVENTER. 06:30 - 08:00 1.50 CLEAN P DECOMP DISPLACE WELL TO CLEAN FRESHWATER. -280 GPM,1,200 PSI. -WHILE CIRCULATING,ABLE TO GET PAST 11,939'. -MW 8.3+PPG IN AND OUT. 08:00 - 09:00 1.00 CLEAN P ■- DECOMP RIH WITH 7"CLEAN OUT BHA FROM 11,939' TO 12,229'. -PU WT 185K,SO WT 145K. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 10 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 11:00 2.00 CLEAN P DECOMP PUMP 290-BBL,140 DEGREE F BARAKLEAN PILL. -LET SOAK 30 MINUTES. 11:00 - 12:30 1.50 CLEAN P DECOMP CIRCULATE OUT BARAKLEAN PILL. -225 GPM,883 PSI. -MONITOR WELL;26 BPH STATIC LOSS RATE. -MW 8.3 PPG IN AND OUT. 12:30 - 19:00 6.50 CLEAN P DECOMP POH WITH 7"CLEAN-OUT BHA FROM 12,229' TO 446'. -35K OVERPULL AND SWABBING AT 11,735'. -WORK TIGHT SPOT 3X. -INTERMITTANT SWABBING THROUGHOUT TRIP. -EXTREMELY HEAVY PARAFFIN ON TOOL JTS AND TUBULARS FROM LAST 6 STANDS OF 4"DP THROUGH LD BHA. 19:00 - 21:30 2.50 CLEAN P DECOMP LD 7"CLEAN-OUT BHA FROM 446'. -MONITOR WELL;25 BPH STATIC LOSS RATE. -FUNCTION TEST RAMS. -CLEAN AND CLEAR RIG FLOOR. -EMPTY BOOT BASKETS. 21:30 - 22:30 1.00 BOPSUR P DECOMP PULL WEAR BUSHING,RU TEST EQUIPMENT, AND SET TEST PLUG. 22:30 - 23:00 0.50 BOPSUR P DECOMP TEST ANNULAR PREVENTER WITH 4"TEST JT. -TEST TO 250 PSI LOW AND 2,500 PSI HIGH; TEST GOOD. -TEST ACCOMPLISHED DUE TO USING ANNULAR PREVENTER IN WELL CONTROL SITUATION THIS MORNING. -AOGCC REP BOB NOBLE WAIVED WITNESS ON15SEP10. 23:00 - 23:30 0.50 BOPSUR P DECOMP RD TEST EQUIPMENT,PULL TEST PLUG,AND SET WEAR BUSHING. -TEST PLUG COMPLETELY COVERED WITH HEAVY PARAFFIN. 23:30 - 00:00 0.50 CLEAN N ' DPRB 12,229.00 DECOMP PU 2ND 7"CLEAN-OUT BHA TO 50'. -38 BPH STATIC LOSS RATE. -MW 8.3 PPG. 9/16/2010 00:00 - 01:00 1.00 CLEAN N DPRB 12,229.00 DECOMP PU 2ND 7"CLEAN-OUT BHA FROM 50'TO 435'. 01:00 - 02:00 1.00 CLEAN N DPRB 12,229.00 DECOMP RIH WITH 2ND 7"CLEAN-OUT BHA FROM 435' TO 3,145'. 02:00 - 02:30 0.50 CLEAN P DECOMP SLIP AND CUT 150'OF DRILLING LINE. 02:30 - 05:30 3.00 CLEAN N DPRB 12,229.00 DECOMP RIH WITH 2ND 7"CLEAN-OUT BHA FROM 3,145'TO 11,100'. -FILL EVERY 3,000'UNTIL 11,100'. 05:30 - 08:00 2.50 CLEAN N DPRB 12,229.00 DECOMP WASH TO BOTTOM FROM 11,100'TO 12,223'. -PU WT 185K,SO WT 145K,ROT WT 160K. -3 BPM,280 PSI. -60 RPM. 08:00 - 08:30 0.50 CLEAN N DPRB 12,229.00 DECOMP CBU. -215 GPM,760 PSI. 08:30 - 10:30 2.00 CLEAN N DPRB 12,229.00 DECOMP PUMP 25-BBL, HI-VIS SPACER FOLLOWED BY A 58-BBL,90 DEGREE F DIESEUBARASCRUB PILL. -CHASE DOWN 4"DP WITH 142 BBLS OF FRESHWATER. Printed 12/9/2010 2:04:20PM Page 11 of 28 North America-ALASKA BP Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10:30 - 11:30 1.00 CLEAN N DPRB 12,229.00 DECOMP CLOSE TOP PIPE RAMS AND LINE UP TO BULLHEAD DOWN IA. -BULLHEAD 600 BBLS,140 DEGREE F FRESHWATER. -340 GPM,2,450 PSI. 11:30 - 12:30 1.00 CLEAN N DPRB 12,229.00 DECOMP SHUT DOWN PUMPS AND ALLOW PRESSURE TO STABILIZE. -MONITOR WELL;0 PSI SHUT-IN PRESSURE. 12:30 - 14:00 1.50 CLEAN N RREP 12,229.00 DECOMP CHANGE OUT KOOMEY HYDRAULIC LINE DUE TO HOSE FAILURE. 14:00 - 17:30 3.50 CLEAN N DPRB 122,229.00 DECOMP OPEN SUPER CHOKE AND CIRCULATE 1.5 BUS THROUGH CHOKE MANIFOLD AND POOR-BOY DEGASSER. -508 BBLS,3 BPM,260 PSI. -FLOW CHECK;NO FLOW. -OPEN TOP PIPE RAMS. -MONITOR WELL;28 BPH STATIC LOSS RATE. -MW 8.3 PPG IN AND OUT. 17:30 - 19:00 1.50 CLEAN N DPRB 12,229.00 DECOMP PUMP 30-BBL, HI-VIS SWEEP AND CIRCULATE IT SURFACE TO SURFACE. -250 GPM,970 PSI. -PILL BROUGHT NOTHING BACK TO SURFACE. -MONITOR WELL FOR 15 MINUTES;27 BPH STATIC LOSS RATE. ,-8.3 PPG MW IN AND OUT. 19:00 - 00:00 5.00 CLEAN N DPRB 12,229.00 DECOMP POH WITH 2ND 7"CLEAN-OUT BHA FROM 12,223'TO 1,187'. -PU WT 185K,SO WT 140K. -30K OVERPULL AT DEPTHS OF 11,862', 11,785',11,754',1 1,700',AND 11,690'. -WORKED ALL TIGHT AREAS. 9/17/2010 00:00 - 01:30 1.50 CLEAN N DPRB 12,229.00 DECOMP LD 2ND 7"CLEAN-OUT BHA TO SURFACE. -"CLEAN AS A WHISTLE'--NO PARAFFIN NOTED. 01:30 - 02:30 1.00 CLEAN N DPRB 12,229.00 DECOMP CLEAN AND CLEAR RIG FLOOR. -LD ALL BAKER FISHING/CLEAN-OUT TOOLS DOWN BEAVALATOR. 02:30 - 03:00 0.50 PXA P DECOMP PU 7"HES CEMENT RETAINER. 03:00 - 08:00 5.00 PXA P DECOMP RIH WITH 7"CEMENT RETAINER ON 12 EA 4" DP SINGLES FROM THE PIPESHED AND STANDS FROM THE DERRICK TO 12,180'. 08:00 - 10:30 2.50 PXA P DECOMP RIH AND SET 7"CEMENT RETAINER ON DEPTH AT 12,190'. -ESTABLISH CIRCULATING PRESSURES AT 4 BPM,370 PSI UNSTUNG,1,393 PSI STUNG IN. -RU TO SQUEEZE CEMENT. -SET DOWN 20K ON RETAINER. Printed 12/9/2010 2:04:20PM North America-ALASKA-BP Page 12 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site:PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual©64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10:30 - 12:30 2.00 PXA P DECOMP LOWER IVISHAK LATERAL SQUEEZE CEMENT JOB. -SWS CEMENTERS PUMP 10 BBLS OF 12 PPG MUDPUSH II. -PRESSURE TEST SURFACE LINES TO 4,000 PSI;TEST GOOD. -SWS CEMENTERS PUMP 163 BBLS 15.8 PPG CLASS G CEMENT. -854 SKS;1.16 CU FT/SK YIELD. -4 BPM,1,280 PSI. -SWAP OVER TO RIG PUMPS AND DISPLACE WITH 129 BBLS OF FRESHWATER AT 4 BPM, ICP 1,300 PSI, FCP 2,330 PSI. -CEMENT IN PLACE AT 1213 HRS. -MW IN AND OUT 8.3 PPG. 12:30 - 13:30 1.00 PXA P DECOMP CBU. -UNSTING FROM CEMENT RETAINER,DROP 5"FOAM DRILL PIPE WIPER BALL,AND MU TOP DRIVE TO 4"DP. -RD CEMENT LINES. -460 BBLS,8 BPM,1,335 PSI. -NO CEMENT SEEN AT SURFACE. -8.3 PPG MW IN AND OUT. 13:30 - 14:00 0.50 PXA P DECOMP MONITOR WELL. -8 BPH STATIC LOSS RATE. -BLOW DOWN TOP DRIVE. 14:00 - 19:00 5.00 PXA P DECOMP POH WITH CEMENT RETAINER RUNNING TOOL FROM 12,185'TO SURFACE. 19:00 - 20:00 1.00 PERF P DECOMP MU PERF GUN, FIRING HEAD,AND XOS. -MONITOR WELL;6 BPH STATIC LOSS RATE. 20:00 - 00:00 4.00 PERF P DECOMP RIH WITH PERF GUN ON 4"DP STANDS TO 9,623'. 9/18/2010 00:00 - 01:30 1.50 PERF P DECOMP RIH WITH PERF GUN ON 4"DP STANDS FROM 9,623'TO 12,190'. -TAG UP ON CEMENT RETAINER AND PU 5' TO 12,185'. -PU WT 180K,SO WT 145K. 01:30 - 02:00 0.50 PERF P DECOMP PERFORATE 7"CASING FROM 12,175'TO 12,185'. -4.5",5 SPF,72 DEGREE PHASING,4505 PJ GUN. -ESTABLISH CIRCULATING RATE AT 3 BPM, 435 PSI. -DROP BALL AND PRESSURE UP TO 1,985 PSI. -FIRE GUN AFTER PRESSURING UP AND FEEL GOOD SURFACE INDICATION OF GUNS FIRING. -POH TO ABOVE PERFS AT 12,150'. -MONITOR WELL;5 BPH STATIC LOSS RATE. 02:00 - 03:00 1.00 PERF P DECOMP CBU. -210 GPM,1,089 PSI. -MONITOR WELL;5 BPH STATIC LOSS RATE. 03:00 - 03:30 0.50 PERF P DECOMP SLIP AND CUT 79'OF DRILLING LINE. 03:30 - 08:30 5.00 PERF P DECOMP POH WITH PERF GUN FROM 12,150'TO 20'. -PU WT 180K,SO WT 145K. -8.3 PPG MW IN AND OUT. 08:30 - 09:00 0.50 PERF P DECOMP LD FIRED PERF GUNS. -ALL SHOTS FIRED. -CLEAN AND CLEAR RIG FLOOR. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 13 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project: Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 11:00 2.00 PXA P DECOMP RU E-LINE TO RIH WITH CCL AND 7"CEMENT RETAINER. 11:00 - 13:30 2.50 PXA P DECOMP RIH WITH E-LINE/CCL AND 7"CEMENT RETAINER. -SET CEMENT RETAINER AT 12,029'ELM. 13:30 - 15:30 2.00 PXA P DECOMP POH E-LINE FROM 12,029'. 15:30 - 16:30 1.00 PXA P DECOMP RD E-LINE. 16:30 - 20:00 3.50 PXA P DECOMP MU HES 7"CEMENT RETAINER STINGER AND RIH ON 4"DP STANDS TO 12,012'. PUWT180K,SOWT142K. 20:00 - 22:00 2.00 PXA P DECOMP ATTEMPTED 7"X OH ANNULUS CEMENT SQUEEZE. -RU CEMENT LINES. -ESTABLISH CIRCULATION RATES;2 BPM, 128 PSI,3 RETURNS;4 BPM,450 PSI,24 RETURNS;AND 6 BPM,962 PSI,37 RETURNS. -STING INTO 7"CEMENT RETAINER AT 12,021'WITH 15K DOWN WEIGHT AND CONFIRM WITH PUMP PRESSURE BEFORE AND AFTER STINGING IN. -STING IN AND ATTEMPT TO ESTABLISH INJECTION RATES X 3;PRESSURED UP TO 2,450 PSI WITH 1.5 BBLS,3,080 PSI WITH 1.9 BBLS,AND 2,600 PSI WITH 1.8 BBLS RESPECTIVELY;EACH ATTEMPT,PRESSURE HELD AND NO BREAKDOWN WAS EVIDENT. -AFTER EACH INJECTION ATTEMPT, UNSTING AND CIRCULATE AT PREVIOUSLY ESTABLISHED CIRCULATION RATES EACH TIME. -TAGGED UP ON RETAINER AND STACKED OUT UPON STINGING IN EXACTLY THE SAME MANNER EACH TIME. -THERE WERE NO RETURNS NOTED IN STACK WHILE STUNG IN AND ATTEMPTING TO INJECT. 22:00 - 23:00 1.00 PXA P DECOMP BLEED PRESSURE AND CONSULT WITH TOWN ENGINEER FOR WAY AHEAD. -MONITOR WELL;5.5 BBL/HR STATIC LOSS RATE. -8.3 PPG MW IN AND OUT. 23:00 - 00:00 1.00 PXA P DECOMP UNSTING FROM 7"CEMENT RETAINER AT 12,021'AND PU TO 11,945'. -RD AND BD CEMENT LINES. 9/19/2010 00:00 - 02:00 2.00 PXA P DECOMP DUMP 50'OF 20/40 MESH SAND ON 7" CEMENT RETAINER SET AT 12,021'. -DUMP IN HOPPER AT 5-7 MIN/50#SACK AND MIX WITH WATER IN HOPPER TO FORM A SLURRY. 02:00 - 02:30 0.50 PXA P DECOMP PU TO 11,915'AND LET SAND DROP IN 4"DP. 02:30 - 03:30 1.00 PXA P DECOMP CIRCULATE 1 4"DP VOLUME TO CLEAR SAND FROM 4"DP ABOVE 7"CASING WINDOW AT 11,861'. -125 BBLS,2 BPM,115 PSI. 03:30 - 07:30 4.00 PXA P DECOMP POH WITH 7"CEMENT RETAINER STINGER FROM 11,861'TO SURFACE. 07:30 - 08:30 1.00 PXA P DECOMP MU 7"CEMENT RETAINER. 08:30 - 09:00 0.50 PXA P DECOMP RIH WITH 7"CEMENT RETAINER TO 2,921'. Printed 12/9/2010 2:04:20PM • North America-ALASKA- BP Page 14 of 28 Operation Summary Report Common Well Name:S-41 _ AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) _ Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 16:00 7.00 PXA N MISC 2,921.00 DECOMP FORCE MAJEURE EVACUATION WITH CREWS. -SHUT IN WELL USING ANNULAR PREVENTER. -SECURED RIG AND SHUT OFF ALL POWER. -EVACUATED RIG AND S-PAD TO CC-2A AND THEN KUSKOKWIM CAMP DUE TO GAS LEAK AT SKID 57 ON S PAD. -WAITED FOR PERMISSION FROM PAD OPERATOR TO RETURN TO PAD. 16:00 - 17:30 1.50 PXA N MISC 2,921.00 DECOMP FORCE MAJEURE EVACUATION WITH CREWS. -RETURNED TO RIG. -CHECK RIG AND ALL OUT BUILDINGS FOR GAS WITH AIR PACKS AND GAS MONITORS. -RESTORE RIG POWER;ALL STEAM,AIR, AND HYDRAULICS RESTORED. -CHECK SIDPP AND SICP;BOTH ZERO PRESSURE. -OPEN WELL AND FILL WITH 31 BBLS OF 8.3 PPG WATER. 17:30 - 22:00 4.50 PXA P DECOMP RIH WITH 7"CEMENT RETAINER ON 4"DP STANDS FROM 2,921'TO 11,692'. SET RETAINER AT 11,692'. -UNSTING. 22:00 - 23:00 1.00 PXA P DECOMP RU CEMENT LINES. 23:00 - 23:30 0.50 PXA P DECOMP PRESSURE TEST 7"CEMENT RETAINER. -TEST TO 3,000 PSI FOR 20 MINUTES WHILE CONDUCTING PJSM FOR CEMENT JOB;TEST GOOD--ROCK SOLID. -USED TOP PIPE RAMS FOR TEST. 23:30 - 00:00 0.50 PXA P DECOMP ESTABLISH CIRCULATION RATES FOR CEMENT JOB. -2 BPM,140 PSI. -4 BPM,463 PSI. -6 BPM,965 PSI. -8.3 PPG MW IN AND OUT. 9/20/2010 00:00 - 02:00 2.00 PXA P DECOMP STING INTO 7"CEMENT RETAINER AND TRY TO ESTABLISH INJECTION RATE. -PUMP AT 2 BPM AND PRESSURED UP TO 2,000 PSI AND HELD. -ATTEMPTED SEVERAL TIMES,WORKING IN AND OUT OF THE STINGER,TO ESTABLISH INJECTION RATE,BUT PRESSURED UP AND HELD EACH TIME. -HES PACKER HAND CONSULTED WITH THEIR TOWN AND SOME DIFFERENT STRATEGIES WERE DISCUSSED TO BE ABLE TO PUMP. -FINALLY WASHED DOWN AT 1/2 BPM WHILE STINGING INTO RETAINER AND WERE ABLE TO PUMP WITHOUT IMMMEDIATE PRESSURE SPIKE. -INJECTION RATES OF 2 BPM,890 PSI AND 4 BPM,1,450 PSI. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 15 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:00 - 04:00 2.00 PXA P DECOMP UPPER SAG RIVER LATERAL CEMENT SQUEEZE. -PUMPED 14 BBLS 12 PPG MUD PUSH II AT 4 BPM. -PRESSURE TESTED SURFACE LINES TO 4,000 PSI;TEST GOOD. -PUMPED 262 BBLS 15.8 PPG CLASS G CEMENT AT 4 BPM. -1,244 SKS,1.16 CU FT/SK YIELD. -DISPLACED WITH 124 BBLS OF 8.3 PPG WATER. -ICP 930 PSI AT 4 BPM,FCP 2,575 PSI AT 4 BPM. -CEMENT IN PLACE AT 0344 HRS. 04:00 - 05:30 1.50 PXA P DECOMP PU TO 11,660', BREAK OFF CEMENT HEAD, DROP FOAM BALL,AND MU TOP DRIVE. -CIRCULATE SURFACE TO SURFACE. -330 GPM,1,281 PSI. -NO CEMENT SEEN AT SURFACE. -MONITOR WELL;WELL STATIC. 05:30 - 09:00 3.50 PXA P ._ DECOMP POH WITH 7"CEMENT RETAINER STINGER FROM 11,660'TO SURFACE. 09:00 - 09:30 0.50 PXA P DECOMP CLEAN AND CLEAR RIG FLOOR. 09:30 - 11:00 1.50 CLEAN P DECOMP PU CEMENT CLEAN-OUT BHA TO 308'. 11:00 - 14:00 3.00 CLEAN P ® DECOMP RIH WITH CEMENT CLEAN-OUT BHA FROM 308'TO 7,458'. 14:00 - 16:00 2.00 CLEAN P DECOMP BOP DRILLS WITH DAVE GUESS'CREW. -D1 (KICK WHILE TRIPPING) -D5(STRIPPING) -D6(WELL KILL) -ALL CREW MEMBERS REFAMILIARIZED WITH SUPER CHOKE OPERATION. 16:00 - 17:30 1.50 CLEAN P DECOMP RIH WITH CEMENT CLEAN OUT BHA FROM 7,458'TO 11,313'. -PU WT 180K,SO WT 145K. 17:30 - 19:00 1.50 WHSUR P DECOMP MU AND RIH WITH CEMENT CLEAN-OUT BHA ON RTTS TO 35'. -BIT DEPTH 11,360'. -LD RTTS RUNNING TOOL. -PRESSURE TEST RTTS TO 3,500 PSI FOR 10 MINUTES;TEST GOOD. 19:00 - 22:00 3.00 WHSUR P DECOMP 7"PACK-OFF CHANGE OUT. -PULL WEAR BUSHING -BOLDS. -PULL 7"PACK-OFF. -INSTALL NEW 7"PACK-OFF. -RILDS. -PRESSURE TEST PACK-OFF TO 500 PSI LOW FOR 5 MINUTES AND 5,000 PSI HIGH FOR 30 MINUTES;TESTS GOOD. 22:00 - 22:30 0.50 BOPSUR P DECOMP PU TEST TOOLS AND RU TO TEST BOPE. Printed 12/9/2010 2:04:20PM North America-ALASKA BP Page 16 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project: Prudhoe Bay Site:PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 22:30 - 00:00 1.50 BOPSUR P DECOMP TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 4,000 PSI HIGH WITH 4"AND 4-1/2"TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4"TEST JOINT. -ALL TESTS GOOD. AOGCC REP BOB NOBLE WAIVED WITNESS TO THE TEST ON 09/20/2010. TEST WITNESSED BY BP WSL RAYMOND PLATT AND NAD TOURPUSHER BIFF PERRY. 9/21/2010 00:00 - 02:30 2.50 BOPSUR P DECOMP CONTINUE TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 4,000 PSI HIGH WITH 4"AND 4-1/2"TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4"TEST JOINT. -ALL TESTS GOOD. AOGCC REP BOB NOBLE WAIVED WITNESS TO THE TEST ON 09/20/2010. TEST WITNESSED BY BP WSL RAYMOND PLATT AND NAD TOURPUSHER BIFF PERRY. 02:30 - 03:30 1.00 BOPSUR P - DECOMP RD TEST EQUIPMENT AND LINES, PULL TEST PLUG,AND INSTALL WEAR BUSHING. 03:30 - 04:00 0.50 WHSUR P DECOMP POH/LD RTTS. 04:00 - 04:30 0.50 CLEAN P ® DECOMP RIH WITH 7"CEMENT CLEAN-OUT BHA FROM 11,242'TO 11,692'. 04:30 - 12:00 7.50 CLEAN N DFAL 11,692.00 DECOMP ATTEMPT TO PRESSURE TEST 7"CASING TO 4000 PSI FOR 30 MIN. TEST FAILED,LOST 800 PSI IN 30 MIN. BLEED DOWN AND CHECK SURFACE EQUIPMENT. LOCK DOWN SCREW LEAKING. REPLACE LOCK DOWN SCREW. RE-TEST AND FAILED AT SAME LOSS RATE. CHECK SURFACE EQUIPMENT AND SERVICE ALL VALVES AND RE-TEST. FAILED AT SAME LOSS RATE. BLOW DOWN LINES AND CONSULT WITH TOWN 12:00 - 16:30 4.50 CLEAN N DFAL 11,692.00 DECOMP POOH FROM 11689'MD TO BHA 16:30 - 18:00 1.50 CLEAN N DFAL 11,692.00 DECOMP LD CLEANOUT BHA. SET BACK 3 STANDS, LD JARS,BOOT BASKETS,BIT SUBFLOAT SUB AND BIT. CLEAN PARRAFIN FROM BOOT BASKETS. 18:00 - 19:00 1.00 CLEAN N DFAL 11,692.00 DECOMP PRESSURE TEST 7"CASING TO 4000 PSI. LOST 350 PSI IN 14 MIN. BLEED PRESSURE. 19:00 - 23:00 4.00 CLEAN N DFAL 11,692.00 DECOMP MU RTTS AND RIH TO 5844' 23:00 - 00:00 1.00 CLEAN N DFAL 11,692.00 DECOMP SET RTTS WITH ELEMENTS AT 5840'MD. 105K PUW,93 SOW. PRESSURE TEST 7" CASING FROM 5840'TO SURFACE TO 4000 PSI FOR 10 MIN. LOST 9 PSI. PRESSSURE TEST 7"CASING FROM 5840'TO TOP OF FAST DRILL PLUG AT 11,692'MD TO 4000 PSI. LOST 388 PSI IN 10 MIN. 9/22/2010 00:00 - 04:00 4.00 CLEAN N DFAL 11,692.00 DECOMP RIH WITH RTTS FROM 5840'TO 11675'MD. 170K PUW,140K SOW Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 17 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 06:00 2.00 CLEAN N DFAL 11,692.00 DECOMP SET RTTS AND TEST FROM 11670'MD TO SURFACE TO 4000 PSI FOR 10 MIN. LOST 7 PSI. RELEASE RTTS AND RIH TO 11692'MD AND TAG FAST DRILL. SET RTTS AT 11683' MD. TEST 7"CASING FROM ABOVE TO 4000 PSI FOR 30 MIN. LOST 12 PSI IN THE FIRST 15 MIN AND 4 PSI IN THE SECOND 15 MIN. TEST 7"CASING FROM 11683'TO 11692'MD AND FAST DRILL PLUG BELOW RTTS. LOST 314 PSI IN 5 MIN 06:00 - 10:30 4.50 CLEAN N DFAL 11,692.00 DECOMP POOH FROM 11692'TO SURFACE. LD RTTS. TRACES OF PARAFFIN ON RTTS 10:30 - 11:00 0.50 CLEAN P DECOMP PICK UP CLEAN OUT BHA AND RIH TO 308' MD 11:00 - 15:30 4.50 CLEAN P DECOMP RIH FROM 308'TO 11595'MD 180K PUW,145K SOW 15:30 - 16:00 0.50 CLEAN P DECOMP CUT AND SLIP 148'OF DRILLING LINE 16:00 - 16:30 0.50 CLEAN P DECOMP SERVICE TOP DRIVE AND CROWN 16:30 - 17:00 0.50 CLEAN P DECOMP SLOW PUMP RATES TAKEN WASH DOWN FROM 11595'TO TAG FASDRILL AT 11692'MD. 250 GPM,922 PSI 17:00 - 20:00 3.00 CLEAN P DECOMP DRILL FASDRILL PLUG FROM 11692'TO 11695' MD.WASH DOWN/NO CEMENT FROM 11695' • TO 11805'MD.DRILL CEMENT FROM 11805' TO 11890'MD. NO CEMENT FROM 11890'TO 11905'MD. DRILL CEMENT FROM 11905'TO 11920'MD. 250 GPM,950 PSI ON,924 PSI OFF 50 RPM,5K TQ ON,4K TQ OFF 186K PUW,142K SOW,160K RTW 20:00 - 22:30 2.50 CLEAN P DECOMP PU TO 11874'MD. 8.4 PPG MW IN AND OUT. PERFORM FIT TO 812 PSI AT 8897'TVD. 10.1 PPG EMW 22:30 - 23:30 1.00 CLEAN P DECOMP CIRCULATE AND RECIPRICATE HI-VIS SWEEP FROM 11877'TO 11783'MD.513 GPM,80 RPM, 7K TQ 200K PUW,135K SOW,140K RTW 23:30 - 00:00 0.50 CLEAN P DECOMP RU TO PERFORM LOT 9/23/2010 00:00 - 00:30 0.50 CLEAN P DECOMP 8.4 PPG MW IN AND OUT. PERFORM LOT TO 3754 PSI AT 8897'TVD. 16.5 PPG EMW 00:30 - 01:00 0.50 CLEAN P DECOMP RD AND BLOW DOWN LINES. 01:00 - 02:00 1.00 CLEAN P DECOMP CIRCULATE AT 11877'MD AT 500 GPM AND 2650 PSI. CONSULT WITH TOWN ON LOT RESULTS 02:00 - 05:00 3.00 CLEAN P DECOMP DRILL CEMENT FROM 11920'MD TO 11960' MD. PUMP SWEEPS AS NEEDED 535 GPM,2908 PSI 50 RPM,8.8 TQ 05:00 - 06:00 1.00 CLEAN P DECOMP WASH/REAM DOWN FROM 11970'TO 12005' MD 06:00 - 08:00 2.00 CLEAN P DECOMP CONTINUE DRILLING CEMENT FROM 12005' MD TO 12021'MD. 540 GPM,2780 PSI 200K PUW,115K SOW,125K RTW 50 RPM,9K TQ ON,8K TQ OFF 08:00 - 09:30 1.50 CLEAN P DECOMP CIRCULATE TO CLEAN HOLE AT 450 GPM, 1980 PSI Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 18 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project: Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:30 - 11:00 1.50 CLEAN P DECOMP POOH FROM 12021'TO 10372'MD 210K PUW,115K SOW 11:00 - 13:00 2.00 CLEAN P DECOMP DISPLACE WELL WITH CLEAN WATER AND NXS LUBE. RECIPRICATE FROM 10372'TO 10279'MD 387 GPM,1640 PSI 70 RPM,5K TQ 167K PUW,135K SOW,145K RTW 13:00 - 13:30 0.50 CLEAN P DECOMP MONITOR WELL,8.4 PPG MW IN AND OUT. RIH FROM 10372'TO 12021'MD 13:30 - 17:30 4.00 CLEAN P DECOMP CIRCULATE AND RECIPRICATE FROM 12020' MD TO 11971'MD 182 GPM,515 PSI 30 RPM,5K TQ 185K PUW,145K SOW,162K RTW 17:30 - 21:00 3.50 CLEAN P DECOMP PJSM,PUMP 100 BBLS AT 140 DEG FRESH WATER. LITTLE RED PUMP 50 BBLS OF DIESEL WITH BARA-SCRUB,FOLLOWED BY ANOTHER 5 BBLS OF DIESEL. RIG FOLLOW WITH ANOTHER 40 BBLS OF 140 DEG FRESH WATER.LET SOAK FOR 5 MIN. PUMP 100 BBLS OF FREAH WATER. CLOSE BOTTOM RAMS AND OPEN TO TIGER TANK. RIH DISPLACE WITH 250 BBLS FRESH WATER. 21:00 - 00:00 3.00 CLEAN P DECOMP POOH FROM 12021'MD TO 2847'MD 9/24/2010 00:00 - 02:00 2.00 CLEAN P DECOMP POOH FROM 2847'MD TO SURFACE. LD CLEAN OUT BHA. CLEAN AND CLEAR RIH FLOOR. 02:00 - 03:00 1.00 EVAL P DECOMP RU SLB E-LINE, RU SHEEVES IN DERRICK. 03:00 - 03:30 0.50 EVAL P DECOMP RIH WITH USIT ON E-LINE TO 200' 03:30 - 05:30 2.00 EVAL N DFAL DECOMP ERROR WITH TELEMETRY SYSTEM WHILE ESTABLISHING FLUID PARAMETERS. POOH AND LD USIT. INSTALL NEW TELEMETRY TOOL AND RIH 05:30 - 12:30 7.00 EVAL P DECOMP RIH TO 12000'MD AND BEGIN LOGGING 7" CASING WITH USIT TO SURFACE 12:30 - 13:00 0.50 EVAL P DECOMP RD SLB E-LINE 13:00 - 18:00 5.00 STWHIP P WEXIT PU 7"WHIPSTOCK BHA WITH STARTER MILL AND 3 WATERMELON MILLS AND IMPULSE MWD TO 1054'MD 18:00 - 19:00 1.00 STWHIP P WEXIT ATTEMPT TO SHALLOW HOLE TEST MWD AT 1054'MD AT 180 GPM AND 294 PSI,POOR SIGNAL. RIH WITH WHIPSTOCK TO 4"DP FROM 1054'TO 1789'MD. SHALLOW HOLE TEST MWD WITH 275 GPM AND 973 PSI. GOOD TEST. 19:00 - 00:00 5.00 STWHIP P WEXIT RIH FROM 1807'TO 10272' 165K PUW,130K SOW 9/25/2010 00:00 - 02:30 2.50 STWHIP P WEXIT RIH WITH WHIPSTOCK ASSEMBLY FROM 10272'TO 11936'MD. 190K PUW,145K SOW TAKE 20K WEIGHT AT 11939'MD AND ATTEMPT TO WORK THROUGH ROTATING 1/2 TURN AT A TIME. ATTEMPT TO WASH THROUGH AT 165 GPM,AND 605 PSI WITHOUT SUCCESS. 02:30 - 04:00 1.50 STWHIP N DPRB 11,939.00 WEXIT SPOT LUBE AT BIT AT 165 GPM AND 605 PSI AND ATTEMPT TO WORK THROUGH TIGHT SPOT WITHOUT SUCCESS Printed 12/9/2010 2:04:20PM • North America-ALASKA-BP Page 19 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 10:30 6.50 STWHIP N DPRB 11,939.00 WEXIT MONITOR WELL,STATIC. PUMP DJ. POOH WITH WHIPSTOCK ASSEMBLY FROM 11936' TO 846'MD 10:30 - 12:30 2.00 STWHIP N DPRB 11,939.00 WEXIT LD WHIPSTOCK BHA,RD HWDP AND DRILL COLLERS. LD WHIPSTOCK MILLS AND SLIDE 12:30 - 14:30 2.00 CLEAN N DPRB 11,939.00 WEXIT PU CLEANOUT BHA. FULL GAUGE JUNK MILL,2 STRING MILLS AND JARS TO 769'MD 55K PUW,55K SOW 14:30 - 19:30 5.00 CLEAN N DPRB 11,939.00 WEXIT RIH WITH CLEAN OUT BHA FROM 769'TO 11774'MD. -187K PUW,150K SOW 19:30 - 22:00 2.50 CLEAN N DPRB 11,939.00 WEXIT WASH DOWN FROM 11774'MD TO 11880'MD AT 167 GPM AND 500 PSI. SLIDE JUNK MILL THROUGH WINDOW TO 11909'MD. TAKE 5K WEIGHT AT 11910'MD. MILL WITH 1K WOB AND 60 RPM FROM 11910'TO 11913'MD. ATTEMPT TO SLIDE THROUGH AND TAKE 30K WEIGHT. WORK MILL WITH 10K DOWN WEIGHT AND ABLE TO SLIDE THROUGH OBSTRUCTION. RIH FROM 11913'MD TO 11967'MD. REAM FROM 11967'MD TO 12015' MD. RIH AND TAG EZSV AT 12020'MD. 22:00 - 00:00 2.00 CLEAN N DPRB 11,939.00 WEXIT DISPLACE WELL TO 8.4 PPG QUIKDRIL N MILLING FLUID. WORK MILLS ACROSS WINDOW AND TIGHT SPOT FROM 11980'MD TO 11950'MD BIT DEPTH. -275 GPM,1380 PSI -100 RPM,5K TQ -187K PUW,145K SOW,155 RTW WORK MILLS ACROSS WINDOW WITHOUT CIRCULATION, NO DRAG. RUN MILL THROUGH WINDOW AND TIGHT SPOT WITHOUT PUMPS OR ROTATING,NO DRAG. TAG EZSV AT 12020'MD 9/26/2010 00:00 - 01:00 1.00 CLEAN N DPRB 11,939.00 WEXIT CONTINUE TO WORK MILLS THROUGH WINDOW AND TIGHT SPOT WITHOUT ROTATION OR PUMPS,NO DRAG. RUN ALL MILLS THROUGH WINDOW AND TAG EZSV AT 12020'MD. POOH TO 11868'MD WITH NO DRAG. 190K PUW,145K SOW 01:00 - 04:30 3.50 CLEAN N DPRB 11,939.00 WEXIT MONITOR WELL,STATIC. PUMP DRY JOB. POOH FROM 11868'MD TO 769'MD 04:30 - 06:30 2.00 CLEAN N DPRB 11,939.00 WEXIT PJSM,RACK BACK 5 STDS HWDP,2 STDS DRILL COLLARS,LD CLEANOUT BHA 06:30 - 08:30 2.00 STWHIP N DPRB 11,939.00 WEXIT PJSM,PU WHIPSTOCK AND MILLING BHA TO 865'MD. 08:30 - 12:00 3.50 STWHIP N DPRB 11,939.00 WEXIT RIH FROM 865'MD TO 1995'MD. SHALLOW HOLE TEST MWD AT 250 GPM AND 825 PSI. CONTINUE RUNNING IN HOLE FILLING EVERY 30 STANDS TO 6603'MD. 125K PUW,100K SOW 12:00 - 16:00 4.00 STWHIP N DPRB 11,939.00 WEXIT RIH FROM 6603'MD TO 11964'MD. 195K PUW,145K SOW SLOW PUMP RATES TAKEN Printed 12/9/2010 2:04:20PM North America-ALASKA-BP Page 20 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:00 - 17:00 1.00 STWHIP P WEXIT ORIENT WHIPSTOCK 65 RIGHT OF HIGH SIDE. SET ANCHOR AT 12020'MD WITH 20K DOWN TO SHEAR ANCHOR. PU 10K OVER TO CONFIRM SET. SET DOWN 45K AND SHEAR OFF WHIPSTOCK. 171 GPM,1002 PSI 60 RPM,6K TQ 195K PUW,145K SOW,160K RTW 17:00 - 00:00 7.00 STWHIP P WEXIT MILL WINDOW FROM 12003'TO 12010'MD 200 GPM,1492 PSI 100 RPM,10K TQ 195K PUW,145K SOW,160 RTW 9/27/2010 00:00 - 15:00 15.00 STWHIP P WEXIT MILL WINDOW FROM 12010'TO 12017'MD AND 20'OF NEW HOLE TO 12032'MD. 200 GPM,1655 PSI -80 RPM,6-7K TQ -15-25 WOB 190K PUW,145K SOW,150K RTW TOW=12003'MD/12012'ELM BOW=12017'MD/12026'ELM 15:00 - 16:00 1.00 STWHIP P WEXIT CIRCULATE HI-VIS SWEEP,WORK MILLS ACROSS WINDOW WITH CIRCULATION AND ROTATION AND W/O CIRCULATION AND ROTATION. NO DRAG UP OR DOWN THROUGH WINDOW 16:00 - 16:30 0.50 STWHIP P WEXIT MONITOR WELL,STATIC 8.6 MW IN AND OUT. POOH FROM 12037'TO 11850'MD. 16:30 - 17:30 1.00 STWHIP P WEXIT PERFORM FIT TO 728 PSI,8.6 PPG MW AT 12003'MD/8932'ND. 10.1 PPG EMW 17:30 - 18:30 1.00 STWHIP P WEXIT CUT AND SLIP DRILLING LINE. ADJUST BRAKES 18:30 - 19:00 0.50 STWHIP P WEXIT SERVICE TOP DRIVE AND CROWN 19:00 - 19:30 0.50 STWHIP P WEXIT SLOW PUMP RATES TAKEN MONITOR WELL,STATIC. PUMP DRY JOB 19:30 - 00:00 4.50 STWHIP P WEXIT POOH FROM 11850'TO 2071'MD 9/28/2010 00:00 - 00:30 0.50 STWHIP P WEXIT POOH FROM 2071'MD 847'MD. 00:30 - 02:00 1.50 STWHIP P WEXIT LD 5 STANDS OF HWDP,3 STANDS OF DRILL COLLARS AND MILLS. BOTH UPPER MILLS IN GAUGE. CLEAN AND CLEAR RIG FLOOR. 02:00 - 03:30 1.50 STWHIP P WEXIT PULL WEAR RING. DRAIN STACK AND FUNCTION RAMS. RU AND JET STACK,KILL AND CHOKE LINES. RD AND BLOW DOWN ,LINES. INSTALL WEAR RING. 03:30 - 05:00 1.50 STWHIP P WEXIT PJSM,MU BHA#15:6"MX-18HDX HUGHES, SHORT PAK PDM 2.0 DEG MOTOR, IMPULSE MWD AND PBL CIRC SUB. TORQUE BIT TO 9K FT-LBS. 05:00 - 06:00 1.00 STWHIP P WEXIT PJSM,PU DRP FROM 197'TO 1139'MD. ATTEMPT TO SHALLOW HOLE TEST MWD. PIPE PRESSURED UP,UNABLE TO CIRCULATE. ATTEMPT TO PUMP AGAIN, STILL PRESSURING UP. 06:00 - 07:00 1.00 STWHIP N DFAL 1,139.00 WEXIT POOH FROM 1139'TO 197'MD 07:00 - 08:30 1.50 STWHIP N DFAL 1,139.00 WEXIT LD BHA#15,UNABLE TO TURN BIT BOX ON MOTOR 08:30 - 09:30 1.00 STWHIP N DFAL 1,193.00 WEXIT CHANGE OUT IBOP AND SAVER SUB 09:30 - 11:30 2.00 STWHIP N DFAL 1,139.00 WEXIT PJSM,PU BHA#16 TO 196'MD Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 21 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:30 - 12:00 0.50 STWHIP N DFAL 1,139.00 WEXIT RIH FROM 196'TO 1137'MD,SHALLOW HOLE TEST MWD AT 250 GPM AND 1040 PSI 12:00 - 14:30 2.50 STWHIP P WEXIT RIH ON 4"DRILL PIPE SINGLES FROM 1137' TO 3582'MD. 14:30 - 18:30 4.00 STWHIP P WEXIT RIH FORM 3582'TO 11859'MD -185K PUW,140K SOW FILL PIPE EVERY 30 STDS 18:30 - 20:00 1.50 STWHIP P WEXIT SERVICE TOP DRIVE TIW/SAVER SUB AND ACTUATED IBOP. PRESSURE TEST TO 250 PSV5MIN,4000 PSV5 MIN EACH 20:00 - 21:00 1.00 STWHIP P WEXIT RIH FROM 11859'TO 11953'MD,ORIENT 65 DEG RHS. SLIDE THROUGH WINDOW WITHOUT DRAG. WASH DOWN FROM 12030' TO 12037'MD SLOW PUMP RATES TAKEN 21:00 - 00:00 3.00 DRILL P PROD1 SLIDE DRILL AHEAD FROM 12037'TO 12079' MD. BUILD AND TURN -228 GPM,1880 PSI ON,1722 PSI OFF -10-20K -180K 0K P UW,1 35K SOW 9/29/2010 00:00 - 05:30 5.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD IN 6" PRODUCTION HOLE FROM 12079'MD TO 12202'MD. BUILD AND TURN FROM 65 DEG INC TO 84 DEG INC AND 61 TO 90 DEG AZM. -252 GPM,1980 PSI ON,1890 PSI OFF -15-20K WOB -183K PUW,137K SOW 05:30 - 07:00 1.50 DRILL P PROD1 CIRCUALTE 40 BBLS HI-VIS SWEEP AROUND AT 250 GPM AND 1920 PSI SLOW PUMP RATES TAKEN 07:00 - 07:30 0.50 DRILL P PROD1 MONITOR WELL,STATIC. PUMP OUT OF HOLE FROM 12215'TO 11948'MD AT 250 GPM, 1800 PSI 07:30 - 12:30 5.00 DRILL P PROD1 MONITOR WELL FOR 10 MIN,STATIC. PUMP DRY JOB. POOH FROM 11948'TO 196'MD 12:30 - 14:00 1.50 DRILL P PROD1 MONITOR WELL.8.6 MW IN AND OUT. LD BHA#16. STAND BACK FLEX COLLARS. MX-18HDX BIT GRADED: 1-1WT-A-E-I-NO-BHA 14:00 - 17:00 3.00 DRILL P PROD1 PU BHA#17:6"MRS513D-A1 B BIT,AIM MOTOR 1.5 DEG, IMPULSE MWD,ADN4 AND PBL SUB TO 214'MD. 17:00 - 22:00 5.00 DRILL P PROD1 RIH FROM 214'TO 1155'MD. SHALLOW HOLE TEST MWD. CONTINUE TO RIH FROM 1155' TO 11877'MD. 205K PUW,125K SOW 22:00 - 22:30 0.50 DRILL P PROD1 SLIP AND CUT 70'OF DRILLING LINE 22:30 - 23:30 1.00 DRILL P PROD1 RIH FROM 11877'TO 12003'MD.ORIENT 65 DEG RHS. SLOW PUMP RATES TAKEN 23:30 - 00:00 0.50 DRILL P PROD1 RIH FROM 12003'TO 12160'MD. 10K DRAG FROM 12038'TO 12040'MD. 9/30/2010 00:00 - 01:30 1.50 DRILL P PROD1 ATTEMPT WORK PIPE DOWN PAST 12160'MD WITH AND WITHOUT PUMPS.TAKING 10-20K WEIGHT. WORK DOWN TO 12170'MD,TAKE 30K WEIGHT. HOLE PACKING OFF. 25-45K OVER PULL. 01:30 - 02:30 1.00 DRILL P PROD1 WORK PIPE BACK TO 12083'MD. PUMP OUT OF HOLE TO 12025'WITHOUT PROBLEMS. CBU 1X AT 250 GPM AND 1930 PSI. Printed 12/9/2010 2:04:20PM North America -ALASKA- BP Page 22 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project: Prudhoe Bay Site:PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 03:30 1.00 DRILL P PROD1 RIH TO 12060'MD AND START TAKING WEIGHT. WORK PIPE DOWN TO 12198'MD, TAKING 10-20K WEIGHT. UNABLE TO WORK PAST 12198'MD. PULL BACK TO 12059' TAKING 10-20K OVER PULLS. RIH TO 12170' AND TAKE WEIGHT. ATTEMPT TO WORK THROUGH. HOLE PACKING OFF AND TAKING 25K OVERPULL 03:30 - 04:30 1.00 DRILL P PROD1 WORK PIPE BACK TO 12060'MD. PUMP OUT OF HOLE TO 12024'MD. RECIPRICATE PIPE FROM 12024'TO 12056'WHILE CIRCULATING HOLE CLEAN AT 255 GPM AND 2017 PSI. 04:30 - 05:30 1.00 DRILL P PROD1 WASH DOWN FROM 12024'MD TO 12080'AND TAKE WEIGHT. WORK DOWN TO 12215'WITH PUMPS. -250 GPM,1980 PSI 05:30 - 12:00 6.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12215'TO 12304'MD WITH 6"PRODUCTION BHA. BUILD FROM 88 DEG TO 97 DEG INC AND TURN FROM 91 DEG TO 96 DEG AZM. -250 GPM,2140 PSI ON,2020 PSI OFF -20K WOB -210K PUW,117K SOW 12:00 - 00:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12304'TO 12535'MD WITH 6"PRODUCTION BHA.HOLD AT 96 DEG INC AND TURN FROM 96 DEG TO 108 DEG AZM. -250 GPM,2310 PSI ON,2052 PSI OFF -10-20K WOB -40 RPM,9K TQ ON,7K TQ OFF -185K PUW,120K SOW,145K RTW CALC ECD=10.0 PPG,ACTUAL ECD=10.09 PPG SLOW PUMP RATES TAKEN KICK WHILE TRIPPING DRILL(D-1) 10/1/2010 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12535'TO 12911'MD WITH 6"PRODUCTION BHA.DROP FROM 94 DEG TO 90 DEG INC AND TURN FROM 110 DEG TO 128 DEG AZM. -250 GPM,2345 PSI ON,2130 PSI OFF -10-20K WOB -60 RPM,8.5K TQ ON,6.5K TQ OFF -192K PUW,130K SOW,147K RTW CALC ECD=9.92 PPG,ACTUAL ECD=10.26 PPG SLOW PUMP RATES TAKEN 12:00 - 00:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12911'TO 13757'MD WITH 6"PRODUCTION BHA.HOLD AT 90 AND TURN FROM 128 DEG TO 118 DEG AZM. -250 GPM,2345 PSI ON,2290 PSI OFF -10-20K WOB -80 RPM,8.5K TQ ON,6.5K TQ OFF -190K PUW,135K SOW,147K RTW CALC ECD=10.0 PPG,ACTUAL ECD=10.48 PPG SLOW PUMP RATES TAKEN Printed 12/9/2010 2:04:20PM North America-ALASKA-BP Page 23 of 28 Operation Summary Report Common Well Name: S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/2/2010 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 13757'TO 14291'MD WITH 6"PRODUCTION BHA.BUILD FROM 90 DEG TO 92 DEG INC,THEN DROP FROM 92 DEG TO 87 DEG INC.TURN FROM 118 DEG AZM TO 135 DEG AZM. -250 GPM,2705 PSI ON,2415 PSI OFF 10-20K WOB -60 RPM,9.5K TQ ON,6.5K TQ OFF -195K PUW,133K SOW,145K RTW CALC ECD=10.21 PPG,ACTUAL ECD=10.53 PPG SLOW PUMP RATES TAKEN KICK WHILE DRILLING DRILL(D2) 12:00 - 16:30 4.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14291'TO 14467'MD WITH 6"PRODUCTION BHA. HOLD AT 88 DEG INC.TURN FROM 135 DEG AZM TO 144 DEG AZM. -250 GPM,2690 PSI ON,2370 PSI OFF 10-20K WOB -60 RPM,10K TQ ON,6.5K TQ OFF -195K PUW,133K SOW,145K RTW CALC ECD=10.21 PPG,ACTUAL ECD=10.53 PPG KICK WHILE DRILLING DRILL(D2) BEGIN TAKING 152 BPH DYNAMIC LOSSES AT 14467'MD,NO STATIC LOSSES 16:30 - 20:00 3.50 DRILL ' P PROD1 SLOW PUMPS TO 2 BPM AND 835 PSI. PULL UP OFF BOTTOM TO 14445'MD. LOSSES SLOWED TO 100 BPH. DROP BALL 1.5"AND PUMP DOWN WHILE RECIPRICATING PIPE AND ROTATING PIPE AT 30 RPM,7K TQ. OPEN UP PBL SUB,25 PSI PRESSURE DROP. BRING RATE UP TO 250 GPM AND 1330 PSI. PUMP 40 BBL LCM PILL WITH 40 PPB CALCIUM CARBONATE.SPOT ON BOTTOM AND LET SIT FOR 15 MIN. MONITOR WELL, BREATHING,CONFIRM RETURNS STOPPED. LOSSES SLOWED TO 40 BPH. DROP STEEL BALLS AND PUMP DOWN AT 4 BPM AND 1060 PSI. SHIFT CLOSE PBL SUB WITH 3000 PSI. CONFIRM BHA OPEN. SLOW PUMP RATES TAKEN 20:00 - 00:00 4.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14467'TO 14603'MD WITH 6"PRODUCTION BHA. HOLD AT 88 DEG INC.TURN FROM 144 DEG AZM TO 151 DEG AZM. MONITOR WELL ON CONNECTIONS FOR DECREASING FLOW. -250 GPM,2620 PSI ON,2257 PSI OFF -10-20K WOB -60 RPM,10K TQ ON,6.5K TQ OFF -190K PUW,125K SOW,147K RTW CALC ECD=10.04 PPG,ACTUAL ECD=10.53 PPG SLOW PUMP RATES TAKEN Printed 12/9/2010 2:04:20PM A North America -ALASKA- BP r Page 24 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/3/2010 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14603'TO 14900'MD WITH 6"PRODUCTION BHA. BUILD FROM 90 DEG TO 98 DEG INC.TURN FROM 154 DEG AZM TO 166 DEG AZM. MONITOR WELL ON CONNECTIONS FOR DECREASING FLOW. -250 GPM,2660 PSI ON,2380 PSI OFF -10-20K WOB -60 RPM,10K TQ ON,7K TQ OFF -190K PUW,125K SOW,147K RTW CALC ECD=10.04 PPG,ACTUAL ECD=10.64 PPG KICK WHILE DRILLING DRILL LOSING 10-15 BPH OF 8.6 PPG QUIKDRIL N WHILE CIRCULATING SLOW PUMP RATES TAKEN 12:00 - 21:30 9.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14900'TO TD AT 15420'MD WITH 6"PRODUCTION BHA. DROP FROM 98 DEG TO 89 DEG INC AND HOLD TO TD.TURN FROM 166 DEG AZM TO 170 DEG AZM AND HOLD TO TD. MONITOR WELL ON CONNECTIONS FOR DECREASING FLOW. -250 GPM,2815 PSI ON,2430 PSI OFF -10-20K WOB -60-80 RPM,9.5K TQ ON,7K TQ OFF -195K PUW,125K SOW,145K RTW CALC ECD=10.35 PPG,ACTUAL ECD=11.07 PPG KICK WHILE DRILLING DRILL LOSING 10-15 BPH OF 8.6 PPG QUIKDRIL N WHILE CIRCULATING SLOW PUMP RATES TAKEN 21:30 - 23:00 1.50 DRILL P PROD1 CIRCULATE 410 BBLS OF 8.6 PPG MUD AT 250 GPM AND 2540 PSI -80 RPM,7K TQ MONITOR WELL,BREATHING,CONFIRM FLOW STOPPED. OFF LOAD DILUTION FLUID TO PITS. 23:00 - 00:00 1.00 DRILL P PROD1 PUMP 160 BBLS OF NEW 8.5 PPG QUIKDRIL N MUD. BACK REAM FROM 15356'TO 15262' MD. -250 GPM,2450 PSI -80 RPM,7K TQ MONITOR WELL ON CONNECTIONS 10/4/2010 00:00 - 01:00 1.00 DRILL P PROD1 BACKREAM OUT OF HOLE FROM 15262'TO 15074'MD. WORK TIGHT HOLE FROM 15126' TO 15072'MD. -250 GPM,2310 PSI -40 RPM,5-10K TQ -145K RTW SHUT DOWN AND MONITOR WELL FOR FLOW,CONFIRM BREATHING. TURN PUMP BACK ON AND PRESSURE DROPPED TO 1330 PSI AT 250 GPM 01:00 - 02:30 1.50 DRILL N DFAL 15,072.00 PROD1 TROUBLE SHOOT DROP IN PUMP PRESSURE. CHECK SURFACE EQUIPMENT,CLEAN PUMP SCREENS,PRESSURE TEST SURFACE EQUIPMENT,ALL GOOD. RE-CHECK PUMP PRESSURE,250 GPM AND 1330 PSI. SUSPECT PBL SUB OPEN Printed 12/9/2010 2:04:20PM North America ALASKA BP Page 25 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 04:00 1.50 DRILL N DFAL 15,072.00 PROD1 DROP 1.5"VINYL BALL TO FUNCTION PBL SUB. PUMP DOWN AT 170 GPM AND 1070 PSI. 25 PSI INCREASE THEN DROP OFF. CHECK PUMP PRESSURES,250 GPM AND 1330 PSI. DROP BALL TO DIVERT FLOW THROUGH BHA. PUMP DOWN AT 170 GPM AND 1164 PSI. PUMP PRESSURE INCREASED FROM 1164 PSI TO 1936 PSI. INCREASE PUMP TO 250 GPM AND 2370 PSI. 04:00 - 12:00 8.00 DRILL P PROD1 BACKREAM OUT OF HOLE FROM 15072'TO 13757'MD. WORKING PIPE THROUGH TIGHT HOLE. MONITOR WELL ON CONNTECTIONS -250 GPM,2250 PSI -40 RPM,5-10K TQ -145K RTW 90 BBLS MUD LOST TO WELL IN PAST 12 HRS 12:00 - 17:00 5.00 DRILL P PROD1 CONTINUE BACKREAMING OUT OF HOLE FROM 13757'TO 12868'MD. -250 GPM,2250 PSI -40 RPM,5-10K -185K PUW,120K SOW,145K RTW 17:00 - 18:30 1.50 DRILL P PROD1 PIPE TORQUED UP AND TOOK 20K OVERPULL AT 12868'MD. UNABLE TO MOVE PIPE. WORK PIPE AND JAR DOWN TO FREE PIPE. 18:30 - 22:00 3.50 DRILL P PROD1 CONTINUE TO BACKREAM OUT OF THE HOLE FROM 12868'TO 12450'MD. PUMP OUT OF HOLE FROM 12450'TO 12235'MD. 10K OVERPULL AT 12235'MD 22:00 - 00:00 2.00 REMCMT P PROD1 UNABLE TO MOVE PIPE AT 12235'MD. WORK AND JAR PIPE DOWN ON PIPE. PBL INADVERTENTLY OPENED. DROP BALLS TO FUNCTION PBL 10/5/2010 00:00 - 01:00 1.00 DRILL P PROD1 CONTINUE TO WORK PIPE AND PUMP DOWN PBL BALLS AT 170 GPM AND 110 PSI. PRESSURE UP TO 2400 PSI TO SHIFT PBL SUB. CONFIRM THAT PBL SHIFTED,250 GPM AND 2200 PSI. CONTINUE TO WORK PIPE DOWN TO FREE.PIPE FREE DOWN 01:00 - 01:30 0.50 DRILL P -_ PROD1 WORK PIPE AND CIRCULATE TO CLEAR BHA. PBL SHIFTED OPEN 01:30 - 02:30 1.00 DRILL P -_ PROD1 RIH FROM 12290'TO 12848'MD -195K PUW,125K SOW 02:30 - 04:00 1.50 DRILL P PROD1 TURN ON PUMPS AND PBL SUB CLOSED INADVERTENTLY,REGAIN CIRCULATION PRESSURE CIRCULATE 50 BBLS HIGH VIS SWEEP SURFACE TO SURFACE AT 250 GPM AND 2100 PSI. -60 RPM,6K TQ -145K RTW Printed 12/9/2010 2:04:20PM North America-`ALASKA-BP Page 26 of 28 Operation Summary Report Common Well Name: S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) ft 04:00 - 07:00 3.00 DRILL P PROD1 BACKREAM FROM 12,848'TO 12,440'MD. -250 GPM,1,975 PSI. -60 RPM,5-6K TQ -145K ROT WT. PUMP OUT OF HOLE FROM 12,440'TO 12,243' MD. TAKE WEIGHT,HANG UP,AND WORK PIPE FREE -PUMP OUT AT 250 GPM,1,140 PSI;PBL SUB OPENED UP AGAIN. BACKREAM FROM 12,243'TO 12,159'MD WITH SAME PARAMETERS AS ABOVE. POH ON ELEVATORS FROM 12,159'TO 12,003'. -PU WT 190K,SO WT 125K. 07:00 - 08:00 1.00 DRILL P PROD1 CBU X 2 AT 7"WINDOW. -400 GPM,1,775 PSI. -60 RPM. TQ 4.5K. -ROT WT 145K. 08:00 - 09:30 1.50 DRILL P PROD1 MONITOR WELL UNTIL STATIC. -PERFORM POST-JARRING DERRICK AND TD INSPECTION. -PUMP DRY JOB AND MONITOR WELL UNTIL STATIC. -MW 8.6 PPG IN AND OUT. 09:30 - 12:00 2.50 DRILL P PROD1 POH FROM 12,003'TO 4,917'. ® -PU WT 105K,SO WT 90K. -PBL SUB CLOSED. 12:00 - 14:30 2.50 DRILL P PROD1 POH 4,917'TO 215'. -MONITOR WELL;SLIGHT LOSS. -MW 8.6 PPG IN AND OUT. 14:30 - 16:30 2.00 DRILL P PROD1 PJSM FOR HANDLING RA SOURCES AND LD BHA. -HANDLE RA SOURCES. -CLEAN AND CLEAR RIG FLOOR. -BIT GRADE--0-1-WT-G-I-X-NO-TD. 16:30 - 17:00 0.50 DRILL P PROD1 TEST BOPE. -PULL WR. -SET TEST PLUG. -RU TEST EQUIPMENT. 17:00 - 22:00 5.00 DRILL P PROD1 TEST BOPE. -TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 4,000 PSI HIGH WITH 4"AND 4-1/2"TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4"TEST JOINT. -ALL TESTS GOOD. AOGCC REP CHUCK SCHEVE WITNESSED THE TEST. TEST WITNESSED BY BP WSLS DAVE NEWLON,JEFF LOFTIS,AND RAYMOND PLATT AND NAD PUSHERS LARRY WURDEMAN AND LENWARD TOUSSANT. 22:00 - 22:30 0.50 DRILL P -_ PROD1 REMOVE TEST PLUG,INSTALL WEAR RING, AND RD/BD TEST EQUIPMENT/LINES. 22:30 - 23:00 0.50 DRILL P ■- PROD1 LOAD PIPESHED WITH MWD TOOLS AND 4" HWDP. -ASSEMBLE SLIM PULSE MWD. Printed 12/9/2010 2:04:20PM North America-ALASKA BP Page 27 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 23:00 - 00:00 1.00 DRILL P PROD1 PU BHA#18 FOR CLEAN-OUT/WIPER RUN. -MU 10'FLEX DRILL COLLAR,NB STAB,AND BIT TO 18'. -CONTINUE ASSEMBLING SLIM PULSE MWD. 10/6/2010 00:00 - 01:30 1.50 DRILL P PROD1 CONTINUE PU BHA#18 TO 177'. 01:30 - 06:30 5.00 DRILL P PROD1 RIH WITH BHA#18 TO 7"WINDOW AT 11,934'. -SHALLOW-HOLE TEST MWD AT 1,119';150 GPM,380 PSI. -PU WT 177K,SO WT 140K. 06:30 - 07:00 0.50 DRILL P PROD1 SLIP AND CUT 87'OF DRILLING LINE. 07:00 - 07:30 0.50 DRILL P PROD1 SERVICE TOP DRIVE. -SERVICE TOP DRIVE,CROWN, BLOCKS, AND INSPECT BRAKES AND DRAWWORKS. 07:30 - 09:30 2.00 DRILL P PROD1 RIH FROM 11,934'TO 14,642'. -TAKE WEIGHT IN REGION OF FAULT AND RUBBLE ZONE. 09:30 - 10:30 1.00 DRILL P PROD1 REAM DOWN FROM 14,642'TO 14,755'. -150 GPM,1,250 PSI. -50 RPM. -6-9K TQ. -150K ROT WT. -ATTEMPT TO BACK REAM SAME;PACK-OFF, TQ UP,AND STALL ROTARY. 10:30 - 11:30 1.00 DRILL P PROD1 RIH FROM 14,755'TO 15,319'. -WORK DOWN TO 15,416'. ,-150 GPM,1,350 PSI. 11:30 - 16:30 5.00 DRILL P PROD1 CBU X 4. -STAGE PUMPS--150 GPM,1,350 PSI;180 GPM,1,550 PSI;215 GPM,1,900 PSI;225 GPM, 1,985 PSI;250 GPM,2,225 PSI. -PU WT 195K,SO WT 125K. -80 RPM. 6.5K TQ. -SLIGHT PACK-OFF AND ROTARY STALL. -RECIPROCATE PIPE. -WASH TO BOTTOM. -PU WT 195K,SO WT 125K,ROT WT 145K. -MW 8.6+PPG IN AND OUT. 16:30 - 21:00 4.50 DRILL P PROD1 BACKREAM FROM 15,420'TO 14,702'. -PUMP 40 BBL LUBE PILL AND CLEAR BHA. -ROTARY STALL AND PACKING OFF. -ESTABLISH CIRCULATION AND ROTATION AND CONTINUE BACKREAMING TO 14,285'. -MONITOR WELL;WELL BREATHING; CONFIRM FLOW SUBSIDES. 21:00 - 21:30 0.50 DRILL P PROD1 TRY TO POH ON ELEVATORS;SWABBING. 21:30 - 00:00 2.50 DRILL P PROD1 PUMP OUT OF HOLE FROM 14,285'TO 7" WINDOW AT 11,934'. -5 BPM,1,280 PSI. 10/7/2010 00:00 - 01:00 1.00 DRILL P PROD1 CBU AT 7"WINDOW. -275 BBLS,250 GPM,1,585 PSI. -80 RPM. -5KTQ. -145K ROT WT. 01:00 - 02:30 1.50 DRILL P PROD1 MONITOR WELL. -MONITOR FOR 21 MINUTES UNTIL DEAD. -PUMP DRY JOB AND MONITOR FOR 17 MINUTES UNTIL DEAD. -DROP 2.25"RABBIT AT STD 125. Printed 12/9/2010 2:04:20PM North America-ALASKA- BP Page 28 of 28 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3-00W9R-C(2,570,419.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 06:30 4.00 DRILL P PROD1 POH FROM 11,934'TO 177'. 06:30 - 07:30 1.00 DRILL P PROD1 LAY DOWN BHA.CLEAN AND CLEAR RIG FLOOR. -BIT GRADE 1-2-WT-A-E-I-ER-TD Printed 12/9/2010 2:04:20PM 0 North America-ALASKA-BP Page 1 of 3 Operation Summary Report Common Well Name:5-41 AFE No Event Type:COM-ONSHORE(CON) Start Date:9/28/2010 End Date: 10/10/2010 X3-00W9R-C(834,132.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/7/2010 07:30 - 10:00 2.50 CASING P RUNPRD RU NABORS CSG CREW W/TORQUE TURN AND COMPENSATOR EQUPT. 10:00 - 16:00 6.00 CASING P RUNPRD RUN LINER -83 JNTS 4.5"VAM TOP,12.6#,13CR-85 -TORQUE TURN-OPT MAKE UP 4440 FT/LBS. -CENT.2 PER JNT.JNTS 1-80 -PUW 72K,SOW 67K 16:00 - 17:30 1.50 CASING P RUNPRD CIRC&COND -1.5 LINER VOL -6 BPM,490 PSI -MIX PAL MIX -RD TORQUE TURN 17:30 - 23:30 6.00 CASING P RUNPRD TIH W/DP. 3,484'TO 11,916' -FILL PIPE EVERY 10 STDS. -PU 160K,SO 130K 23:30 - 00:00 0.50 CASING P RUNPRD CIRC&COND ABOVE 7'WINDOW -221 BBLS -STAGE PUMPS TO 5 BBLS/MIN @ 1070 PSI 10/8/2010 00:00 - 00:30 0.50 CASING P RUNPRD CONT.CBU -5 BBLS./MIN @ 1,070 PSI 00:30 - 04:00 3.50 CASING `P RUNPRD CONT.RIH FROM 11,916'TO 15,420' -WORK TIGHT HOLE FROM 14,696'TO 14,790' MAKE UP CMT HEAD&DP SINGLE. -WASH DOWN TO 15,420'&TAG TD @ 15,420'.PU 7'TO 15,413 -PUW 195K,SOW 125K 04:00 - 07:30 3.50 CASING P RUNPRD CIRC -STAGE PUMPS UP TO 5 BBLS-MIN @ 1,475 PSI -CBU X 3 @ 5 BBLS-MIN. 07:30 - 09:30 2.00 CEMT P RUNPRD CEMENT 4.5"LINER -PUMP 25 BBLS;11.5 PPG;MUD PUSH II. -PRESS TEST CEMENT LINES TO 4500 PSI. -PUMP 79 BBLS;15.8 PPG;CLASS G CMT W/ GAS-BLOK -YIELD 1.17 CU FT/SK,379 SKS. -DISPLACE W/55 BBL PERF PILL FOLLOWED BY 124 BBLS MUD. -RECIP PIPE UNTIL CEMENT WENT BY LINER HANGER. -BUMP PLUG&PRESSURE UP TO 3200 PSI. -SET HANGER;SLACK OFF TO CONFIRM SET. -BLEED BACK PRESSURE -CHECK FLOATS; FLOATS HELD. -SET PKR W/75K.REPEAT W/ROT TO VERIFY TWICE. ***CEMENT IN PLACE @ 8:45AM*** Printed 12/9/2010 2:03:40PM • North America -ALASKA- BP Page 2 o 3 Operation Summary Report Common Well Name: S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date:9/28/2010 End Date: 10/10/2010 X3-00W9R-C(834,132.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:30 - 11:00 1.50 CEMT P RUNPRD CIRC&COND -PRESS.UP TO 1,000 PSI; PU 23';LINER TOP @ 11,954' -CIRC OUT CEMENT -450 GPM;2,600 PSI. -18 BBLS CMT TO SURFACE -CIRC TOTAL OF 504 BBLS -MONITOR WELL;WELL STATIC -MUD WT 8.8 PPG -RD BD LINES; LD CMT HEAD 11:00 - 16:30 5.50 CEMT P RUNPRD POH W/LINER RUNNING TOOLS • -CONFIRM DOG SUB SHEARED. -VERIFY BREAKS ON RUNNING TOOL.LD SAME -CLEAN&CLEAR RIG FLOOR 16:30 - 17:30 1.00 CEMT P RUNPRD SERVICE TOP DRIVE 17:30 - 21:00 3.50 CEMT N RREP RUNPRD RIG REPAIR-TOP DRIVE -BACK UP WRENCH CRACKED.CHANGE OUT BACK UP WRENCH. 21:00 - 22:30 1.50 PERFOB P OTHCMP PU 2-7/8"PERF GUN HANDLING TOOLS 22:30 - 00:00 1.50 PERFOB P OTHCMP PU 2-78"HSD PERF GUNS&E FIRE-TCP FIRING HEADS -2906 POWER JET;6 SPF; -TOTAL FT LOADED 1,560.00';TOTAL BLANK 361.96';TOTAL GUN LENGTH 1,921.96 10/9/2010 00:00 - 09:00 9.00 PERFOB P OTHCMP RIH W/ 2-78"HSD PERF GUNS&E FIRE-TCP FIRING HEADS&DP -2906 POWER JET;6 SPF 60 DEG PHASING. -TOTAL FT LOADED 1,560.00';TOTAL BLANK 361.96';TOTAL GUN LENGTH 1,921.96 -TAG LANDING COLLAR&PU TO 15,150'(MD) FIRING DEPTH. **KICK WHILE TRIPPING DRILL** 09:00 - 10:00 1.00 PERFOB P OTHCMP RU AND TEST LINER -PRESSURE UP TO 3500 PSI. -PRESSURE BLED BACK TO 1500 PSI IN 10 MIN. -PREP TO FIRE GUNS 10:00 - 12:30 2.50 PERFOB P OTHCMP PERF @ 12,700-13,100';13,200-13,600'; 13,700-14,100;14,200-14,350;14,940-15,150'. -RUN FIRING SEQUENCE.NO INDICATION GUNS FIRED.ABORT FIRING SEQUENCE BY CLOSING RAMS AND PRESS UP TO 1700 PSI;WAIT 20 MIN. -RUN 2ND SEQUENCE W/NO INDICATION GUNS FIRED. 12:30 - 14:00 1.50 PERFOB P OTHCMP CIRC.&COND.HOLE. -CIRC 462 BBLS @ 5 BBLS/MIN.&1715 PSI. 14:00 - 15:00 1.00 PERFOB N MISC 15,150.00 OTHCMP 2 ATTEMPTS TO FIRE GUNS W/NO INDICATION GUNS FIRED. 15:00 - 20:30 5.50 PERFOB P OTHCMP POH FROM 15,150'TO 11,900'MD.MONITOR WELL.SLIGHT DROP IN FLUID LEVEL 0 BSERVED.CONT TO POH TO 3,453'MD. **KICK WHILE TRIPPING DRILL** 20:30 - 21:30 1.00 PERFOB P OTHCMP RU 2-7/8"TBG&PERF GUN HANDLING TOOLS 21:30 - 23:00 1.50 PERFOB P OTHCMP LD 2-78"PAC HT TBG -HOLD PJSM WITH PERF CO.PRIOR TO PULLING GUNS TO 200'BELOW RT. Printed 12/9/2010 2:03:40PM North America-ALASKA- BP Page 3 of 3 Operation Summary Report Common Well Name:S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date:9/28/2010 End Date: 10/10/2010 X3-00W9R-C(834,132.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 23:00 - 00:00 1.00 PERFOB P OTHCMP LD DISCONNECT&FIRING HEAD.ZERO PRESSURE ON HEAD.CONFIRMATION THAT GUNS FIRED.CONT TO LD PERF GUNS. 10/10/2010 00:00 - 08:00 8.00 PERFOB P OTHCMP LD 2-7/8"PERF GUNS. -88 JNTS.GUNSTOTAL&17 JNTS.PAC PIPE. -CLEAN FLOOR AND PREP PIPESHED FOR WHIPSTOCK BHA. • Printed 12/9/2010 2:03:40PM North America-ALASKA BP Page 1 of 3 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 10/1/2010 End Date: 10/16/2010 X3-00W9R-C(1,120,415.00) Project: Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/10/2010 08:00 - 10:00 2.00 STWHIP P WEXIT P/U BHA.WHIPSTOCK&MILLING BHA FROM SURF TO 11,857'MD. -SHALLOW TEST MWD @ 900' -PU 195K;SO 137K 10:00 - 17:00 7.00 STWHIP P WEXIT TIH FROM 853'TO 11,857'MD. -SHALLOW TEST MWD @ 900' -PU 195K;SO 137K **KICK WHILE TRIPPING DRILL** 17:00 - 17:30 0.50 STWHIP P WEXIT ORIENT WHIPSTOCK 35 DEG OF HIGH SIDE. -TAG TOL @11,960'MD. -SET 20K DOWN TO SET ANCHOR. -PU TO CONFIRM -SO 35K TO SHEAR BOLT. -TOW 11,926'BOW 11,939'MD 17:30 - 19:00 1.50 STWHIP P WEXIT CIRC&COND MUD -250 GPM,1930 PSI,CIRC 404 BBLS. 19:00 - 00:00 5.00 STWHIP P WEXIT MILL WINDOW 11,926'TO 11,939'MD -RPM 80-90,TO 10-14K. REC 100 BBLS METAL 10/11/2010 00:00 - 01:00 1.00 STWHIP P WEXIT MILL WINDOW AND NEW FORMATION FROM 11,946 TO 11,957 -RPM 80-100,TQ 10-14K -WOB 10K -290 GPM,@ 2370 PSI,&120 SPM 01:00 - 02:00 1.00 STWHIP P WEXIT CIRC&COND. -WORK BHA THRU WINDOW SEVERAL TIMES W/&WITHOUT PUMP -PUMP SWEEP -250 GPM;2460 PSI. -PU 195K;SO 140K;RTW 145K 02:00 - 04:30 2.50 STWHIP N DPRB 11,918.00 WEXIT ATTEMPT TO TEST TO A 10.1 EMW -MADE 4 ATTEMPTS TO TEST TO 600 PSI -UNABLE TO HOLD MORE THAN 400 PSI ON ALL ATTEMPTS. -PUMP DRY JOB. 04:30 - 08:30 4.00 DRILL P PROD2 TOH W/MILLS TO 820' 08:30 - 11:00 2.50 DRILL P PROD2 LD 6"MILL BHA 11:00 - 11:30 0.50 DRILL P PROD2 FLUSH BOP STACK W/JETTING TOOL. -FUNTION TEST BOPS 11:30 - 13:00 1.50 DRILL P PROD2 PU BHA#20 13:00 - 17:00 4.00 DRILL P PROD2 TIH W/BHA#20 FROM 204'TO 1145'. SHALLOW TEST MWD.CONT.TIH TO 11,867' MD. 17:00 - 17:30 0.50 DRILL P PROD2 CUT&SLIP DRL LINE. -FOUND BROKEN DP SLIP HANDLE MISSING. -FISH FROM BOP STACK. 17:30 - 18:00 0.50 DRILL P PROD2 SERVICE TOP DRIVE 18:00 - 19:00 1.00 DRILL P PROD2 CIRC.&COND. -DROP 1.76"BALL. -PUMP 2 BPM TO OPEN CCV W/2,000 PSI -CBU 290 GPM,1730 PSI. -MONITOR WELL.WELL STATIC. 19:00 - 21:00 2.00 DRILL P PROD2 CIRC&COND. -DISPLACE 8.8 PPG QUICKDRILn W/8.5 PPG NEW QUICKDRILn. Printed 12/9/2010 2:03:58PM North America ALASKA-BP Page 2 of 3 Operation Summary Report Common Well Name:S-41 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 10/1/2010 End Date: 10/16/2010 X3-00W9R-C(1,120,415.00) Project: Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) ft) 21:00 - 21:30 0.50 DRILL P ■- PROD2 CIRC&COND -ORIENT BIT&MOTOR TO 35 DEG RIGHT AND TAG TD . 11,957'MD. 21:30 - 00:00 2.50 DRILL P PROD2 DIRECTIONAL DRILL AHEAD-SLIDING -11,957'MD TO 12,013'MD -250 GPM,2090 PSI ON BTM,1965 PSI OFF BTM. -PU 195K,SO 135K. -MW 8.5 PPG 10/12/2010 00:00 - 17:00 17.00 DRILL P PROD2 DRILL AHEAD DIRECTIONALY.SLIDING 12013 TO 12,365.' WOB 15K,GPM 250, PSI ON BTM 2120,OFF BTM 1955 -PU 195K,SOW 135K -NO MUD LOSS WHILE DRILLING **KICK WHILE DRILLING(D2)DRILL** 17:00 - 18:30 1.50 DRILL P PROD2 PUMP OUT OF HOLE 12,365'MD TO 11,866' MD. -PUMP 30 BBL HI VIS SWEEP AND CLEAR BIT. -NO INCREASE IN CUTTINGS RETURN WITH SWEEP. -MONITOR WELL.WELL STATIC. 18:30 - 19:00 0.50 DRILL P PROD2 DROP 1.76"BALL,AND OPEN CCV W/2,100 PSI.PUMP DRY JOB 19:00 - 23:30 4.50 DRILL P PROD2 TOH 11,866'MD TO 204'MD -MONITOR WELL.WELL STATIC. -DROP 1.76 BALL&CLOSE CCV W/1,545 PSI. 23:30 - 00:00 0.50 DRILL P PROD2 TOH 204'MD TO 160'MD. 10/13/2010 00:00 - 01:00 1.00 DRILL P PROD2 TOH W/BHA&LD. 01:00 - 02:30 1.50 DRILL P PROD2 PU BHA#21 02:30 - 08:30 6.00 DRILL P PROD2 TIH A BHA TO 12,365'MD - -SHAL LLOW TEST MWD @ 1,160'MD.250 GPM & 1,000 PSI. 08:30 - 00:00 15.50 DRILL P PROD2 DIRECTIONAL DRILL 12,365 TO 12,763'MD. -250 GPM,2270 PSI ON BTM,1990 OFF BTM -RPM 60,6K TO 8.5K WHILE ROTATING - WOB 15K,PU 195K, SO 132K, ROT 150K -ECD CALC 9.14, ACT 10.02 10/14/2010 00:00 - 00:00 24.00 DRILL P PROD2 DIRECTIONAL DRILL AHEAD AS PER GEOLOGY FROM 12,763'TO 14,421'MD -WOB 15K, RPM 80,TQ ON B 9.5K,TQ OFF B 6.5K -PU 195K,SO 130K, ROT 147'K -GPM 250, PSI ON BTM 2530',OFF BTM -CALC ECS 9.99,ACT ECD 10,55 10/15/2010 00:00 - 10:00 10.00 DRILL P PROD2 DIRECTIONAL DRILL AS PER GEOLOGY 14,421'MD TO 15,257'MD. -WOB 15K,GPM 250, PSI 2587 ON BTM,2250 OFF BTM. -TQ 10K ON BTM,7K OFF BTM, RPM 80 -PU 200K,SO 125K, RT 145K -CALC ECD 10.07,ACTUAL ECD 10.64 10:00 - 11:00 1.00 DRILL P ■- PROD2 CIRC.&COND. -PUMP SWEEP @ 250 GPM,2250 PSI. -MONITOR WELL.WELL STATIC Printed 12/9/2010 2:03:58PM North America-ALASKA- BP Page 3 of 3 Operation Summary Report Common Well Name:S-41 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date: 10/1/2010 End Date: 10/16/2010 X3-00W9R-C(1,120,415.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft(above Me an Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:00 - 18:00 7.00 DRILL P PROD2 BACK REAM 15,257'TO 12,585' -249 GPM,1880 PSI. -PU 185K,SO 125K, RT 145 -RPM 80 18:00 - 19:30 1.50 DRILL P PROD2 PUMP OUT OF HOLE 12,585'TO 11,882'. -DID NOT CIRC.OR ROTATE THRU WINDOW 11,939'TO 11,926'.HAD 10K DRAG COMING THRU WINDOW. 19:30 - 21:00 1.50 DRILL P PROD2 CIRC.&COND.@ 11,882. -DROP 1.76"BALL AND OPEN CCV W/1850 PSI. -CIRC.&RECIP WHILE PUMPING HIGH VIS SWEEP,11,882'TO 11,788' -MIN.CUTTINGS INCREASE WITH SWEEP BACK. -CIRC AN ADDITIONAL BTMS UP. -MONITOR WELL.WELL STATIC. **KICK WHILE TRIPPING DRILL** 21:00 - 21:30 0.50 DRILL P PROD2 MONITOR WELL FOR FLOW.WELL STATIC. 21:30 - 00:00 2.50 DRILL P PROD2 TOH 11,875'TO 7084' -PUMP DRY JOB -DROP 2.25"DRIFT 10/16/2010 00:00 - 02:30 2.50 DRILL P PROD2 TOH 7,084'MD TO BHA. 02:30 - 04:30 2.00 DRILL P PROD2 LD BHA BIT GRADE 1-1-WT-A-X-INO Printed 12/9/2010 2:03:58PM North America-ALASKA-BP Page 1 of 5 Operation Summary Report Common Well Name:S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date: 10/8/2010 End Date: 10/23/2010 X3-00W9R-C(1,336,658.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. _ UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/16/2010 04:30 - 06:30 2.00 CASING P RUNPRD RU CSG CREW TO RUN 4.5"PRODUCTION LINER 4.5"L-80 12.6LB/FT IBT-M 06:30 - 10:30 4.00 CASING P RUNPRD RUN IN HOLE WITH 4.5"L-80, 12.6 LB/FT IBT-M CSG TO 3325'MD.MU BAKER 5'HRD LINER SUING TOOL. 10:30 - 15:30 5.00 CASING P RUNPRD CONT.RIH WITH LINER ON 4"DP TO 13,701'. -LINER SET DOWN @ 13,701'. -SET DOWN 20K SLIGHT MOVEMENT. **KICK WHILE TRIPPING DRILL,X2 BOTH CREWS** 15:30 - 19:00 3.50 CASING N STUC 13,701.00 RUNPRD WORK LINER. -SET DOWN 20K SLIGHT MOVEMENT. -SET DOWN TO 60K NO MOVEMENT. -PULL UP TO 320K, NO MOVEMENT. -WORK PIPE WITH NO PROGRESS -DECISSION MADE TO RELEASE FROM LINER 19:00 - 20:30 1.50 CASING P RUNPRD DROP&PUMP DOWN BALL TO RELEASE RUNNING TOOL FROM LINER. -PRESSURE UP TO 4150 PSI,PINS DID NOT RELEASE. -RU TEST PUMP&PRESSURE UP TO 4200 PSI.PINS SHEARED OFF TOOL. -TOP OF LINER @ 10,393'BTM OF LINER @ 13,701'MD 20:30 - 21:30 1.00 CASING P RUNPRD CUT&SLIP DRILLING LINE -121 FT CUT 21:30 - 22:00 0.50 CASING r P RUNPRD SERVICE TOP DRIVE 22:00 - 00:00 2.00 CASING P RUNPRD TOH WITH LINER RUNNING TOOL TO 6300' -18 BBLS MUD LOST TO WELL IN A 12 HR PERIOD. 10/17/2010 00:00 - 02:00 2.00 CASING P RUNPRD CONT.TOH W/LINER RUNNING TOOL.LD SAME 02:00 - 03:00 1.00 FISH N STUC RUNPRD PU 2-7/8"PAC HT HANDLING TOOLS&BAKER 3-3/4"MECH.CUTTER. 03:00 - 06:00 3.00 FISH N STUC 1,590.00 RUNPRD PU 50 SINGLE JOINTS PAC HT TBG&RIH to 1580' **KICK WHILE TRIPPING DRILL** 06:00 - 12:00 6.00 FISH N STUC 11,947.00 RUNPRD TIH WITH 4.5"CSG CUTTER&BHA#22. 12:00 - 14:30 2.50 FISH N ' STUC 11,947.00 RUNPRD CUT 4.5"IBTM,12.6LB/FT,L-80 LINER @ 11,947'. -228 GPM,2330 PSI,66 RPM. 14:30 - 21:00 6.50 FISH N STUC 1,590.00 RUNPRD TOH W/CSG CUTTER BHA.PULL TO PAC PIPE -MONITOR WELL PRIOR TO TRIPPING WELL STATIC. -MONITOR WELL @ BHA.WELL STATIC 21:00 - 00:00 3.00 FISH N STUC RUNPRD LD PAC PIPE AND BAKER CSG CUTTER. 10/18/2010 00:00 - 00:30 0.50 FISH N STUC RUNPRD LD BAKER CSG CUTTER BHA&CLEAN FLOOR -GOOD INDICATION ON CUTTER BLADES THAT CSG IS CUT 00:30 - 02:00 1.50 FISH N STUC 228.00 RUNPRD PU BAKER SPEAR W/3.947"GRAPPLE&BHA #23 Printed 12/9/2010 2:04:08PM North America ALASKA-BP Page 2 of 5 Operation Summary Report Common Well Name:S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date: 10/8/2010 End Date: 10/23/2010 X3-00W9R-C(1,336,658.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual©64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:00 - 06:00 4.00 FISH N STUC 10,392.00 RUNPRD TIH W BHA#23 TO TOP OF FISH @ 10,392' -KICK WHILE TRIPPING DRILL. 06:00 - 06:30 0.50 FISH N STUC 10,392.00 RUNPRD ENGAGE FISH WITH SPEAR -GAINED 15K STRING WT. -LAY DOWN ONE STAND -MONITOR WELL.WELL STATIC. 06:30 - 12:30 6.00 FISH N STUC 1,785.00 RUNPRD TOH TO BHA @ 1785'. -MONITOR WELL.WELL STATIC 12:30 - 13:30 1.00 FISH N STUC 1,785.00 RUNPRD STAND BACK DC'S.LD FISHING BHA 13:30 - 17:00 3.50 FISH N STUC RUNPRD LD 37 JNTS OF 4.5"IBT,12.6LB/FT,LINER. -CUT JOINT 35.15'. -STUB ON TOP OF LINER 3.79'SLOTTED LINER -TOL 11,948'MD 17:00 - 18:00 1.00 FISH N STUC RUNPRD LD SPEAR,GRAPPLE,AND 4.5"HANDLING TOOLS. 18:00 - 19:00 1.00 FISH P ® RUNPRD PU BAKER WHIPSTOCK RETRIEVING TOOL LUG TYPE,&BHA#24. 19:00 - 21:30 2.50 FISH P - RUNPRD TIH WITH DP TO 5,887' -FILL PIPE • 3066' 21:30 - 23:30 2.00 FISH P RUNPRD CIRC.&COND. -PIPE PRESSURED UP WHILE FILLING. -HAD TO WORK PIPE TO UNPLUG SINGLE (3/4")JET ON RETRIEVING TOOL. -CIRC AND CONDITION MUD--170 GPM 970 PSI, 23:30 - 00:00 0.50 FISH - P RUNPRD TIH W/BHA#24 TO 7,298'MD. -22 BBLS LOST TO WELL IN LAST 12 HRS. 10/19/2010 00:00 - 02:30 2.50 FISH P RUNPRD RIH FROM 7298'MD TO TOP OF WHIPSTOCK AT 11926'MD. WASH DOWN AT 4 BPM AND 900 PSI 02:30 - 03:30 1.00 FISH P RUNPRD ENGAGE WIPSTOCK W/LUG. -PU 60K OVER STING WT.FIRE JARS AND SHEAR PINS -GAIN OF 10K TO STRING WT. SHUT DOWN AND MONITOR WELL,STATIC POOH FROM 11926'TO 11879'MD 03:30 - 05:00 1.50 FISH P RUNPRD CBU 1X AND HI VIS SWEEP AT 240 GPM AND 1205 PSI -PUMP SWEEP -MONITOR WELL.WELL STATIC. 05:00 - 12:30 7.50 FISH P ■- RUNPRD -ATTEMPT MONITOR TO ELL WELL SWABBING. -MONITOR WELL&WORK PIPE. POOH FROM 11879'TO 716'MD 12:30 - 15:00 2.50 FISH P -_ RUNPRD LD WHIPSTOCK RETRIEVAL BHA AND WHIPSTOCK 15:00 - 16:30 1.50 BOPSUR P RUNCMP RU TO TEST BOPE 16:30 - 22:30 6.00 BOPSUR P RUNCMP TEST BOPE AND CHOKE MANIFOLD TO 4000 PSI HIGH AND 250 PSI LOW WITH 4"AND 4-1/2"TEST JOINTS. TEST ANNULAR PREVENTER TO 2500 PSI HIGH AND 250 PSI LOW WITH 4"TEST JOINT WITNESS TO THE TEST WAIVED BY JEFF JONES. TEST WITNESSED BY WSL'S MIKE HEFLEY AND RYAN CIOLKOSZ AND TOOLPUSHERS KELLY COSBY AND BIFF PERRY Printed 12/9/2010 2:04:08PM North America-ALASKA- BP Page 3 of 5 Operation Summary Report Common Well Name:S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date: 10/8/2010 End Date: 10/23/2010 X3-00W9R-C(1,336,658.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 22:30 - 23:00 0.50 BOPSUR P RUNCMP RD TEST EQUIPMENT AND INSTALL 6-15/16" ID WEAR RING,BLOW DOWN CHOKE AND KILL LINES 23:00 - 00:00 1.00 BOPSUR P RUNCMP PJSM,MU CLEAN OUT BHA#25:REVERSE CIRCULATING JUNK BASKET,BOOT BASKETS,STRING MAGNET AND CASING SCRAPER 10/20/2010 00:00 - 01:00 1.00 CLEAN P RUNCMP MU CLEANOUT BHA AND RIH TO 247'MD 01:00 - 05:00 4.00 CLEAN P RUNCMP RIH FROM 247'TO 10405'MD. FILL PIPE EVERY 30 STANDS\ -170K PUW,135K SOW 05:00 - 07:30 2.50 CLEAN P RUNCMP DROP BALL AND WASH DOWN FROM 10405' TO 11958'MD AND 4 BPM AND 1730 PSI. TAG TIE BACK AT 11958'MD. RIH TO 11970'MD. 07:30 - 10:30 3.00 CLEAN P RUNCMP CIRCULATE AND CONDITON AT 3 BPM AND 1251 PSI 10:30 - 12:00 1.50 CLEAN P RUNCMP DISPLACE WELL TO SEAWATER AT 5 BPM AND 1700 PSI 12:00 - 12:30 0.50 CLEAN P RUNCMP MONITOR WELL,8.5 PPG SEAWATER IN AND OUT. POOH FROM 11970'TO 11910'MD. DROP BALL AND OPEN CIRC SUB WTH 2050 PSI 12:30 - 13:30 1.00 CLEAN P RUNCMP CIRCULATE AND RECIPROCATE FROM 11910 TO 11816'AT 427 GPM AND 2120 PSI. ROTATE AT 20 RPM. SLOW PUMP RATES TAKEN 13:30 - 22:00 8.50 CLEAN P I RUNCMP MONITOR WELL, 8.5 PPG SEAWATER IN AND OUT. LD 4"DP FROM 11910'TO 247'MD 22:00 - 23:30 1.50 CLEAN P RUNCMP MONITOR WELL, 8.5 PPG SEAWATER IN AND OUT. LD CLEANOUT BHA#25. —1 CUP OF FORMATION AND METAL DEBRIS FROM RCJB AND 1 GALLON OF SAME FROM BOOT BASKETS 23:30 - 00:00 0.50 CLEAN P RUNCMP CLEAN AND CLEAR RIG FLOOR. PU FLOAT SUB AND MULE SHOE. 10/21/2010 00:00 - 01:30 1.50 CLEAN P RUNCMP MU MULE SHOE AND FLOAT SUB. RIH WITH STANDS OF DRILL PIPE TO 3527'MD 01:30 - 02:30 1.00 CLEAN P RUNCMP CUT AND SLIP 117'AND DRILLING LINE 02:30 - 05:00 2.50 CLEAN P RUNCMP POOH FROM 3527'MD LAYING DOWN DRILL PIPE. 05:00 - 07:00 2.00 RUNCOM P RUNCMP PJSM, RU TO RUN 4.5"VAMTOP COMPLETION 07:00 - 00:00 17.00 RUNCOM P RUNCMP MU JEWERY AND RIH WITH 4.5"12.6#13CR85 COMPLETION TO 11600'MD. TORQUE TURN TO 4440 FT/LBS KICK WHILE TRIPPING DRILL 10/22/2010 00:00 - 01:30 1.50 RUNCOM P RUNCMP RIH AND TAG UP ON TIE BACK RECEPTACLE. PICK UP SPACE OUT PUP. 01:30 - 03:30 2.00 RUNCOM P RUNCMP RU AND REVERSE CIRCULATE 148 BBLS OF SEAWATER TREATED WITH CORROSION INHIBITOR FOLLOWED BY 70 BBLS OF CLEAN SEAWATER 03:30 - 06:00 2.50 RUNCOM P RUNCMP LAND TUBING AND RUN IN LOCK DOWN SCREWS. DROP BALL AND ROD. PRESSURE UP TUBING TO 4000 PSI TO SET PACKER AND TEST TUBING FOR 30 MIN Printed 12/9/2010 2:04:08PM North America-ALASKA-BP Page 4 of 5 Operation Summary Report Common Well Name:S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date: 10/8/2010 End Date: 10/23/2010 X3-00W9R-C(1,336,658.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 12:30 6.50 RUNCOM N DFAL RUNCMP TUBING FAILED PRESSURE TEST. PRESSURE DECREASED 250-PSI IN 30 MINUTES. RETESTED WITH SAME RESULT. WORKED THROUGH TROUBLESHOOTING PROCESS AND ISOLATED DOWNHOLE LEAK TO BELOW PACKER. SUCCESSFULLY PRESSURE TESTED VA AND PACKER TO 4000-PSI FOR 30 CHARTED MINUTES. CONFERRED WITH DRILLING SUPERINTENDENT,ODE AND DRILLING OPERATIONS MANAGER ON PATH FORWARD. AGREED AND TOOK DECISION TO MIRU SLICKLINE UNIT TO FISH BALL AND ROD AND RHC PLUG BODY AND SET CAT STANDING VALVE TO ALLOW RETEST OF TUBING. 12:30 - 13:30 1.00 RUNCOM N DFAL RUNCMP WAIT ON SLICKLINE UNIT TO ARRIVE. 13:30 - 16:30 3.00 RUNCOM N DFAL RUNCMP MIRU SLICKLINE UNIT. PJSM ALL CREW. RU SLICKLINE PRESSURE CONTROL EQUIPMENT. PRESSURE TEST LUBRICATOR TO 3500 PSI ROLLING TEST. 16:30 - 18:30 2.00 RUNCOM N DFAL RUNCMP RIH WITH RETRIEVING TOOL AND RETRIEVE BALL AND ROD. WEAR ON SIDE OF BALL 18:30 - 22:00 3.50 RUNCOM N DFAL RUNCMP RIH AND RETRIEVE RHC-M PROFILE 22:00 - 23:30 1.50 RUNCOM N DFAL RUNCMP RIH WITH STANDING VALVE AND SET IN XN NIPPLE. 23:30 - 00:00 0.50 RUNCOM N DFAL RUNCMP PRESSURE TEST TUBING TO 3500 PSI FOR 15 MIN. RD TEST EQUIPMENT 10/23/2010 00:00 - 01:30 1.50 RUNCOM N DFAL RUNCMP POOH WITH SLICK LINE AND RIG DOWN SLICK LINE BOPE. 01:30 - 02:30 1.00 RUNCOM P RUNCMP RU AND PRESSURE TEST TUBING TO 4000 PSI FOR 30 MIN. LOST 16 PSI IN THE FIRST 15 MIN AND 2 PSI IN THE SECOND 15 MIN. 02:30 - 03:00 0.50 RUNCOM P RUNCMP PRESSURE UP ON IA AND SHEAR DCK WITH 2700 PSI. PUMP DOWN IA AND TUBING TO CONFIRM OPEN 03:00 - 04:30 1.50 WHSUR P RUNCMP INSTALL TWC AND PRESSURE TEST FROM ABOVE AND BELOW TO 1000 PSI FOR 10 MIN. BLOW DOWN ALL LINES AND SUCK OUT STACK 04:30 - 07:30 3.00 BOPSUR P RUNCMP PJSM,ND BOPE STACK AND SET BACK. 07:30 - 12:00 4.50 BOPSUR P RUNCMP PJSM,NU TREE AND ADAPTER FLANGE. TEST TREE TO 5000 PSI HIGH AND 250 PSI LOW FOR 10 MIN AND ADAPETER FLANGE TO 5000 PSI FOR 30 MIN. 12:00 - 14:00 2.00 BOPSUR P RUNCMP RU DSM LUBRICATOR. PRESSURE TEST LUBRICATOR WITH DIESEL TO 250 PSI LOW AND 3500 PSI HIGH FOR 10 MIN. PULL TWC 14:00 - 16:30 2.50 WHSUR P RUNCMP LITTLE RED REVERSE CIRCULATE 77 BBLS OF DESIEL DOWN THE IA AT 3 BPM AND 1400 PSI. ALLOW DESIEL TO U-TUBE TO TUBING FREEZE PROTECT TUBING AND IA DOWN TO 2200'TVD/2270'MD 16:30 - 19:30 3.00 WHSUR P RUNCMP RU DSM AND TEST LUBRICATOR TO 3500 PSI HIGH AND 250 PSI LOW FOR 10 MIN. PULL TWC. INSTALL BPV AND TEST FROM BELOW TO 1000 PSI FOR 10 MIN. REMOVE SECOND ANNULUS VALVE,INSTALL GAUGES AND SECURE TREE. Printed 12/9/2010 2:04:08PM North America -ALASKA- BP Page 5 of 5 Operation Summary Report Common Well Name:S-41 AFE No Event Type:COM-ONSHORE(CON) Start Date: 10/8/2010 End Date: 10/23/2010 X3-00W9R-C(1,336,658.00) Project:Prudhoe Bay Site: PB S Pad Rig Name/No.:NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor:NABORS ALASKA DRILLING INC. UWI: Active Datum:S-41A Actual @64.98ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 19:30 - 23:00 3.50 WHSUR P RUNCMP LD BAILES,PREP FLOOR,RU BRIDLE LINES, MOVE SATELLITE CAMP,SHOP,PREP PITS FOR MOVE,CHANGE TO 5.5"PUMP LINERS 23:00 - 00:00 1.00 WHSUR P RUNCMP LAY OVER DERRICK. SECURE WELL AND RELEASE RIG TO S-129 AT 00:00 ON 10/24/2010 Printed 12/9/2010 2:04:07PM S-41A & S-41AL1 , Well History Date Summary 10/22/10 ***WELL SHUT IN ON ARRIVAL***(assist nabors rig 7es) PULLED BALL AND ROD E011,915' SLM. PULLED 4 1/2" RHC PLUG BODY @11,920'SLM/11,916' MD. SET CAT STANDING VALVE IN XN NIPPLE @11,920'SLM/11,916' MD. ****JOB STILL IN PROGRESS,WSR CONTINUED ON 10/23/2010**** 10/23/10 ***WSR CONTINUED FROM 10/22/2010***(assist rig 7es) RIG PERFORMED P/T ON TUBING TO 3,500 PSI. (test passed) LEFT 4 1/2"CAT STANDING VALVE IN XN NIPPLE @11,920'SLM/11,916' MD. 10/24/10 T/I/O=0/0/0 Pulled 4"CIW H TWC#257 thru tree @ 102" using 1-2'ext. Post Nabors 7ES tree test.Set 4" CIW H BPV# 150 thru tree @ 102" using 1-2'ext. Nabors 7ES RDMO 10/24/10 T/I/O=0/0/0 Performed LTT against SSV(barrier) Pass; R/U lubricator&P/T-Pass; Pulled 4" CIW BPV #150 w/1-2'ext @ 96"; Post Nabors 7ES 10/24/10 ***WELL SHUT IN ON ARRIVAL***(post-rig) PULL ST#4 BK-DGLV CO (7099'SLM) (7111' MD) PULL ST#5 BEK-DCK @ (3733'SLM) (3742' MD) SET ST#5 BK-LGLV @ (3733'SLM) (3742' MD) SET ST#4 BK-OGLV @ (7099'SLM) (7111' MD) RIH W/4-1/2" GR TO PULL CAT VALVE ***CONT.ON 10/25/10 WSR*** 10/25/10 ***WSR CONT FROM 10/24/10***(post-rig) PULL 4-1/2"CAT STANDING VALVE @ 11889' SLM(11915' MD) DRIFTED TO 12046'SLM W/2.50" SAMPLE BAILER(-TBSP OF FINE SAND) UNABLE TO MAKE HOLE PAST 12,046'SLM(POSSIBLY DEVIATION W/LIGHT FILL, DID NOT WORK HARD). RUN PETRADAT GAUGES(GOOD DATA) HAD TO CHANGE THIRD STOP TO 12,080' MD/8896' SS DUE TO SETTING DOWN HIGH. *** RIG DOWN TURN WELL BACK TO DSO*** *** NOTIFY PAD OP OF DEPARTURE*** 10/31/10 ASRC Test unit#1, move in,begin rig up**job in progress** **inlet well S-41, outlet S-42** 11/01/10 ASRC Test unit#1, complete rig up, POP well**job in progress** **inlet well S-41,outlet S-42** 11/02/10 ASRC Test unit#1,flowing well, increasing choke and gas lift, monitor for solids**job in progress** **inlet well S-41, outlet S-42** **conduct PSM/well control drill and safety drill @ night and day shift safety meetings** 11/03/10 ASRC Test unit#1,complete 12 hour test**job in progress** **inlet well S-41, outlet S-42** 11/04/10 ASRC Test unit#1,complete 12 hour test,continue flow, phase II called divert well down flow line,freeze protect surface lines and secure location,go to weather standby @ 9:00 am **inlet well S-41,outlet S-42** 11/05/10 ASRC Test unit#1,arrive back on location,dig out, begin rig down**job in progress** **inlet well S-41,outlet S-42** 11/06/10 ASRC Test unit#1, RDMO**job complete** **inlet well S-41,outlet S-42** Page 1 of 2 S-41A & S-41AL1 , Well History Date Summary Page 2 of 2 me ' Data Analyzer Query Results Query Name: LOT/FIT Fixed Field Data by Wellbore Comm.WB Date LOT/FIT MW Surface Name (ppg) TVD(ft) TMD(ft) press(psi) BHP(psi) EMW(ppg) S-41A :9/22/2010 LOT 8.40: 8,897.32 11,920.00: 3,754.0: 7,636.5: 16.52 S-41A 49/27/2010 FIT 8.604 8,932.00' 12,003.004 728.04 4,718.46 10.17 S-41A :9/27/2010 4:37:00 PM FIT : 8.604 8,932.001 12,009.004 728.06 4,718.46 10.17 S-41AL1 :10/11/2010 4:30:00 AM FIT 8.804 8,901.24: 11,919.004 400.06 4,469.14 9.67 12/9/2010 17:32 Page 1 of 1 S CNN2 ' P.0�44�ty4y p_OI�NNrpmp 00284820t� m2OditppDT- 232^0 810°8�Pym< t2p81�N2 3NpO n 0 0 0.0 n--y-y0y 0V m , -4.-O aO ("0020, V 000 M.,- m OM N;9 0 N N E AA AAA Q 4t7Am Cf 2222 22222 212228 (702.8 NNNNN NNNNN NN a 3 m mmm m m m `o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 J O O O O O O O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66666 66666 66666 e a o 66666 oOoo 66666 m<o p o o e d vQ 4 4 d d d d e Q vQ v. ,1-4- 1—. d tQ O Q 4 d d v d ve Q vQ 4 d v73;;;;(73M H m 2 m S go m nN m � REM8. 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N mm • 0 oLL C O N m m 0p p N p N 7t.2 m > _ RE Z7.1,E8 mW04@,02 102;".8100 oV t20)10N 221.7821, r.6-nN0 ~EONDOO § 2 8= O t7 f7 CJ< d N N 2 10 tr0!� I� W 00 m ro 02f m O O p�p :="4'08!;i N 2 m 10 ii U' Q d d d d Q d d d d d d d Q d d d d d Q Q N N N N NNN N m O N .W 0) C y l_ _8 10 1�QQ V) p E g EON 002 y RA Q map O N `�� ,_N 13 e 100. d E m m y E (j N N S-41A&AL1 Sag Laterals PTD''T'. 210-101 &210-102 Page 1 of 1 Schwartz, Guy L (DOA) From: Schwartz, Guy L(DOA) Sent: Thursday, September 30, 2010 10:26 AM To: 'Johnson, David A(Swift)' Subject: RE: S-41A&AU Sag Laterals PTD No. 210-101 21'0-102 Dave, The liner lap mentioned below is technically placed within the"Prudhoe Oil Pool" . There is no requirement to extend the liner lap in this case as it is not a barrier to flow to other oil pools or to protect freshwater sources. Thanks for bringing this up... I didn't see this in the PTD application. Guy Schwartz Senior Petroleum Engineer AOGCC 793-1226 (office) 444-3433 (cell) From: Johnson, David A(Swift) [mailto:David.A.Johnson @bp.com] Sent: Tuesday, September 28, 2010 9:00 AM To: Schwartz, Guy L (DOA) Cc: Egbejimba, Uchenna J Subject: S-41A&All Sag Laterals PTD No. 210-101 &210-102 Guy, Confirming our conversation, The S-41A lower lateral kicks off in the Shublik shale and drills up into the Sag formation. It will be completed with a 4-1/2" cemented liner. Do too the short spacing between the two proposed Sag laterals, the liner lap will only be —40' to 45'. There will be a liner top packer on top. The second upper Sag lateral kicks off in the Sag will be completed with a 4-1/2" slotted liner which will be dropped off in the open hole. The USIT log showed good cement bonding and good pipe condition. Dave David Johnson BP Rotary Drilling Office: 907-564-4171 Cell: 907-632-5806 Fax: 907-564-4046 9/30/2010 SMITE DIF SEAN PARNELL,GOVERNOR ALASKA OIL AND GAS 333 W.7th AVENUE,SUITE 100 CONSERVATION COMMISSION ANCHORAGE,ALASKA 99501-3539 PHONE (907)279-1433 FAX (907)276-7542 John Egbejimba Engineering Team Leader BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU S-41AL1 BP Exploration (Alaska), Inc. Permit No: 210-102 Surface Location: 4152' FSL, 4504' FEL, SEC. 35, T12N, R12E, UM Bottomhole Location: 639' FSL, 2088' FWL, SEC. 25, T12N, R12E, UM Dear Mr. Egbejimba: Enclosed is the approved application for permit to re-drill the above referenced development well. The permit is for a new wellbore segment of existing well PBU S-41A, Permit No 210- 100, API 50-029-22645-01. Production should continue to be reported as a function of the original API number stated above. This permit to drill does not exempt you from obtaining additional permits or an approval required by law from other governmental agencies and does not authorize conducting drilling operations until all other required permits and approvals have been issued. In addition, the Commission reserves the right to withdraw the permit 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 terms and conditions of this permit may result in the revocation or suspension of the permit. Sincerely, t j� � / Cat y P. Fo stem Commi sioner DATED this t day of August, 2010. cc: Department of Fish & Game, Habitat Section w/o encl. (via e-mail) Department of Environmental Conservation w/o encl. (via e-mail) RECEIVED STATE OF ALASKA ALASK.. .,IL AND GAS CONSERVATION COMMIS..,JN JUL. 2 8 2010 PERMIT TO DRILL Alaska Q11&Gas Cale.Commission 20 AAC 25.005 1 a.Type of work: lb.Proposed Well Class: ®Development Oil ❑Service-Winj ❑Single Zone lc. Speci�'f hh 191 roposed for: ❑ Drill ®Redrill ❑ Stratigraphic Test ❑Development Gas ❑Service-Supply ❑Multiple Zone ❑ Coalbed Gas ❑Gas Hydrates ❑ Re-Entry ❑ Exploratory ❑Service-WAG ❑Service-Disp ❑Shale Gas 2. Operator Name: 5.Bond: ® Blanket ❑Single Well 11. Well Name and Number: BP Exploration(Alaska)Inc. Bond No. 6194193 PBU S-41AL1 3. Address: 6. Proposed Depth: 12.Field/Pool(s): _ P.O. Box 196612,Anchorage,Alaska 99519-6612 MD 15212' ND 8915' Prudhoe Bay Field/Prudhoe 4a. Location of Well(Governmental Section): 7. Property Designation(Lease Number): Bay Oil Pool Surface: ADL 028257 4152'FSL,4504'FEL, SEC.35,T12N, R12E, UM °• Top of Productive Horizon: 8. Land Use Permit: 13. Approximate Spud Date: 2732'FSL, 1654'FWL, SEC.25,T12N, R12E, UM September 10,2010 Total Depth: 9.Acres in Property: 14.Distance to Nearest Property: 639'FSL,2088'FWL, SEC.25,T12N, R12E, UM 2560 7,023' 4b. Location of Well(State Base Plane Coordinates-NAD 27): 10.KB Elevation above MSL: -65.5' feet 15.Distance to Nearest Well Open Surface: x- 618930 y-5980355 Zone- ASP4 GL Elevation above MSL: 37' feet to Same Pool: 469' 16.Deviated Wells: Kickoff Depth: 11932 feet 17.Maximum Anticipated Pressures in psig(see 20 AAC 25.035) Maximum Hole Angle: 96 degrees Downhole: 3289 Surface: 2403 18. Casing Program: Specifications Top-Setting Depth-Bottom Quantity of Cement,c.f.or sacks Hole Casing Weight Grade Coupling Length MD TVD MD , TVD (including stage data) 6" 4-1/2" 12.6# L-80 VamTop 3270' 11942' 8910' 15212' 8914' Uncemented Slotted Liner 19. PRESENT WELL CONDITION SUMMARY(To be completed for Redrill and Re-entry Operations) Total Depth MD(ft): Total Depth ND(ft): Plugs(measured): Effective Depth MD(ft): Effective Depth TVD(ft): Junk(measured): _ 13867' 9058' 11897' 13867' 9058' None Casing Length Size Cement Volume MD TVD Conductor/Structural 80' 20" ,260 sx Arcticset(Anorox.) 80' 80' Surface 3298' 9-5/8" 1067 sx CS III,272 sx'G', 30 sx CS II 3332' 3045' Intermediate 12376' _ 7" 360 sx Class'G'.212 sx Class'G' 12409' 9032' Production _ _ Liner 1638' 4-1/2" Uncemented Slotted Liner 12229'- 13867' 9006'-9058' 5-41L1 Liner 2114' 4-1/2" Uncemented Slotted Liner 11921'- 14035' ,,m1._-,8_944._ ' Perforation Depth MD(ft): S-41 Slotted Section: 12235'- 12865' Perforation Depth ND(ft): S-41: 9007'-9052' S-41 L1 Slotted Section: 11948'- 14005' S-41 L1: 8911'-8946' 20.Attachments: ❑ Property Plat ❑ BOP Sketch ®Drilling Program ❑Time vs Depth Plot ❑Shallow Hazard Analysis ❑ Diverter Sketch ❑Seabed Report ®Drilling Fluid Program 0 20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the foregoing is true and correct. Contact Mel Rixse,564-5620 Printed Name John Egbejimba Title Engineering Team Leader Prepared By Name/Number Signature :7/( • l/T one 564-5859 Date 7/D-7//0 Terrie Hubble,564-4628 Commission Use Only Permit To Drill API Number: Permit r val a g See cover letter for Number: Q?/Q/Dv7 50-029-22645-61-00 ��(i k3 other requirements Conditions of Approval: If box is checked,well may not be used to explore for,test,or produce coalbed methane,gas hydrates,or gas contained shales: IR( 3S� S� — ,_! Other: � /-� � P �G72-5-7*Sf ` Samples Req'd: ❑yes �No Mud Log Req'd: 0 ![1 No * 2 S00 1,03 a /),n/w-Ian /,7 . 1H2S Measures: EYes ❑No Directional Survey Req'd: Yes ❑No — �De y 2aC /G5 i-ih� Op i— 1�1C s �.c.cep 4 Lc ZD MO 2.5.z S$ C k) APPROVED BY THE COMMISSION Date ��/7i' z.i ,COMMISSIONER Form 10 401 Revised 07/2009 This permit is valid for 24 months from the ate of approval(20 AAC 25.005(8)) Submit In Duplicate ORIGINAL �`9s� - V- 5-'6 To: Tom Maunder, Petroleum Engineer 4o Alaska Oil & Gas Conservation Commission p R' From: Mel Rixse, ODE Date: July 21, 2010 Re: S-41A & S-41AL1 Permit to Drill Request A permit to drill two laterals from existing well S-41 is requested. The existing two laterals will abandoned, then two new 6" production holes will be drilled from a KOP in the 7" casing at -12,022' MD and -11,937' MD respectively. The S-41A lateral will be drilled to a final well TD at -15,392' MD where a 4-1", 12.6#, 13-Cr liner will be run to TD and cemented. The S-41AL1 lateral will be drilled to a final well TD at -15,212' MD where a 4-�/2", 12.6#, L-80 slotted liner will be run to TD. The planned completion for this well will include a 4-1/2", 12.6#, 13 chrome tubing string with gas lift mandrels and a permanent production packer. This well is currently scheduled for Rig Nabors 7ES, beginning 10-September- 2010. Please refer to the additional data within this request for specific well details. Please call if additional information is required. Mel Rixse - DE Office - 564-5620 Cell -223-3605 S-41 A&S-41 AL1 Sidetrack Page 1 Well Name: S-41A & S-41 AL1 Drill and Complete Plan Summary Type of Well (service/producer/injector): ( Sag River Producer Surface Location: X = 618,930.12 /Y = 5,980,354.93 4,152' FSL, 4,504' FEL , T12N, R12E, Sec. 35 Target Locations: 625,075 5,985,000 -8863 TVDSS A Leg Ivishak: 625,860 5,984,500 -8900 TVDSS 626,260 5,984,265 -8907 TVDSS 626,518 5,984,025 -8910 TVDSS 626,670 5,983,660 -8890 TVDSS 626,800 5,983,075 -8910 TVDSS Target Locations: 625,020 5,984,315 -8867 TVDSS AL1 Leg Ivishak: 625,165 5,983,050 -8847 TVDSS 625,325 5,982,615 -8837 TVDSS 625,490 5,982,230 -8849 TVDSS A Leg Bottom Hole X = 626,800 /Y= 5,983,075 Z = -8,910' TVDss Location: 1461' FSL, 1867' FEL, T12N, R12E, Sec. 25 AU Leg Bottom Hole X = 625490 /Y= 5,982,230 Z = -8,849' TVDss Location: 639' FSL, 3192' FEL, T12N, R12E, Sec. 25 AFE I X3-00W9R-C:PREPOST Rig: I Nabors 7ES • Estimated Start Date: 1 09/10/2010 Operating days to complete: 1 30.8 MD 15,3927 TVD 8910'/ RT/GL: 29.5'/36' RTE: 65.5' (A/AL 15,212' ss: 8849' 1): Well Design: I Dual lateral - Horizontal Objective: I Sag River S-41 A&S-41AL1 Sidetrack Page 2 _Directional: Ver. Schlumberger P6 for S- 41 A/ P4 for S-41 AL1 KOP: 12,022' MD for A 11,923 for AL1 Maximum Hole Angle: 97.5°/96.6°production section for S-41 A and S-41 AL1 respectively Close Approach Wells: There are no close approaches to this well other than the existing legs of parent S-41. Nearest well within Pool S-41 A:604'to R-20A BHL. S-41 AL1: 469'to R-20A BHL. Distance to Nearest Property S-41 A: 6975'. S-41AL1: 7023' Line: Current Well Information Well Name: S-41A&S-41 AL1 API Number: 50-029-22645-00&50-029-22645-60 PTD: 1960240& 1960250 Well Type: Producers Current Status: Oil Producer Shut-In since 2008 BHP: 3260 psi @ 8800'TVDss (7.1 ppg) BHT: 200°F @ 8800'TVDss Mechanical Condition: Tubing: Shut in-TxIA communication. Caliper log indicated max penetrations of 92% (2777' md), 88% (1225' md) and 85% (2387' md). 4-1/2", 12.6#, L- 80, NSCT to 11,366' MD. TD/PBTD S-41: 13,867' MD/13,867' MD(Abandoned w/CIBP to-12,000' MD pre-rig) TD/PBTD S-41 L1 14,065' MD/14,065' MD(will be P&A to -11,921' MD pre-rig) Max Dogleg (to KOP): 9.4°/100' CO 11329' MD Max Angle(to KOP): 65.9° @ 11,935' MD Existing Wellhead Equipment: FMC IC Spool FMC-120, 11"5000 psi w/1-2-1/16"outlet valve Tbg. Spool: FMC 11" 5000 psi with 2-2-1/16"outlet valves Tbg. Hanger: FMC 12 x 4-1/2"Tubing Hanger NSCT Box 7" Csg. Hanger FMC 7"x 10" Fluted Mandrel Hanger 9-5/8"Csg. Hanger: FMC 9 5/8" Mandrel Hanger Tbg. Head Adapter: FMC 11" Tree: Cameron H 4-1/16"5K BPV Profile: Cameron H 4"Type H Planned Wellhead Equipment: No change Completion Equipment: SSSV: 4-1/2"HES X Nipple(3.813" ID) Gas Lift Mandrels: See current schematic S-41A&S-41AL1 Sidetrack Page 3 , Casing Equipment: Existing: Surface Casing: 9 5/8"40#, L-80 to 3332' MD Intermediate Casing: 7", 26#, L-80 casing surface to 11,371' MD— crossed over to 7"29#L-80 to 12,409' MD(TD of 7"). 9-5/8"Cement: 1044 sx Class E Lead 11.5 ppg,272 sx Class C Tail 15.7 ppg 7" 357 Sx Premium Lead 11.0 ppg,289 sx Premium Tail 15.7 ppg New: Production Liner S-41A: 4-1/2" 12.6#Chrome, 15,932' MD to 11,994' MD Production Liner S-41AL1: 4-1/2" 12.6#L-80 slotted liner, 15,212' MD to 11,932' MD Production Tubing: 4-1/2" 12.6#Chrome, 11,937 MD to surface Tubing Fluids: 8.6 ppg w/2000'diesel or methanol cap IA Fluids 8.6 ppg w/2000'diesel cap OA Freeze Protection 10.6 LSND w 2000'diesel cap Perforations: As Planned - P&A'ed w/cement tested to 2500 psi. Pre-Rig MIT/PPPOT Data: MIT-OA -08-05-2005 MIT-OA passed 2400 psi. CMIT-T x IA - To be performed after tubing scale removal and plug set it tubing tail. (Will be tested to 4000 psi.) MIT-T - Holes in tubing PPPOT-T - 10/7/2002 PPPOT-T—Pass 5000 psi PPPOT-IC - 10/7/2002 PPPOT-IC—Pass to 3000 psi S-41A&S-41AL1 Sidetrack Page 4 Logging Program: Production Hole Drilling: MWD/RES/NEU/DEN/GR CO bit INC(NOT Az. Density) Open Hole: None Cased Hole: None Mud Program Production Mud P roperties: FLO PRO SF Reservoir Drill-in Fluid I 6"hole section Depth Interval Density(ppg) PV YP LSVR API Fl pH MBT S-41A 12,022'— 8.4—8.5 6-12 22-28 >20,000 6.0-8.0 9.0-9.5 <3 15,394' S-41AL1 11,932' 8.4—8.5 6-12 22-28 >20,000 6.0-8.0 9.0-9.5 <3 —15,230' Casing/Tubing Program: Hole Csg/ Wt/Ft Grade Connection Length Top Btm Size Tbg O.D. MD/TVD MD/TVD S-41 A 4 1/2" 12.6 13 Cr Vam Top 3398' 11,994'/8932' 15,392'/8976' 6" S-41 AL1 4'/2"- Slotted 12.6 L-80 Vam Top 3270' 11,942'/8910' 15,212'/8914' 6" Tubing 4 1/2" 12.6 13Cr VamTop 11,979' GL 11,979/8925' Integrity Testing: Test Point Depth Test Type EMW Production Section 20'—50' from 7" shoe FIT 10.0 ppg Cement Calculations: Production 4.5" 12.6#, 13-Cr Casing:Casing Size S- Production Liner 41A onl Basis: Lead: None Tail: 3372'of 4-1/2"X 6"open hole with 40%excess,43'4-1/2"X 7"Liner Lap, 80'shoe track, and 200' of 7"X 4" DP excess Tail TOC: 11,969' MD(TOL) Total Cement Volume: Lead None Tail 75 bbls,429 ft', 392 sacks Class G w/D600 © 15.8 ppg, 1.16 ft3/sack Temp BHST= 195° F, BHCT TBD by Schlumberger S-41A&S-41AL1 Sidetrack Page 5 Formation Tops S-41A: Formation Tops Formation Tops TVD Formation Formation TVDss RKB Thickness TJF(10375 MD) -7778 -7844 TJE(10643 MD) -8011 -8077 -233 TJD(10816 MD) -8163 -8229 -152 TJC(11271 MD) -8523 -8589 -360 TJB(11490 MD) -8639 -8705 -116 TSGR(11880'MD) -8812 -8878 -173 TSHA(12001) -8863 -8929 -51 KOP @ 12022 MD in Shublik"A" TSAD proj. @ -8940 SSTVD @ Invert (-12220 MD) -8940 -9006 Fault 1 Crossing @ 12550'MD TSHA -8882 -8948 TSGR proj. @ -8847 SSTVD @ 12800' MD -8847 -8913 TSGR proj. @ -8882 SSTVD @ 13600' MD -8882 -8948 TSGR proj. @ 8889 SSTVD @ 14000' MD -8889 -8955 TSGR proj. @ -8892 SSTVD @ 14400' MD(DT on Fault 2) -8892 -8958 Fault 2 Crossing @ 14413'MD TSHA(UT) -8900 -8966 TSGR proj. @ -8866 SSTVD @ 14800' MD -8866 -8932 TSGR proj. @ -8887 SSTVD @ PTD (15392 MD) -8887 -8953 S-41A&S-41 AL1 Sidetrack Page 6 Formation Tops S-41 AL1 : Formation Tops Formation Tops TVD Formation Formation TVDss RKB Thickness TJF(10375 MD) -7778 -7844 TJE(10643 MD) -8011 -8077 -233 TJD(10816 MD) -8163 -8229 -152 TJC(11271 MD) -8523 -8589 -360 TJB(11490 MD) -8639 -8705 -116 TSGR(11880'MD) -8813 -8879 -174 KOP @ 11932 MD in Sag TSHA -8861 -8927 Fault 1 Crossing @ 12390'MD TSAD proj. @ -8944 SSTVD @ Invert (-12300 MD) -8944 -9010 TSHA -8884 -8950 TSGR proj. @ -8846 SSTVD @ 13100' MD -8846 -8912 TSGR proj. @ -8832 SSTVD @ 14000' MD -8832 -8898 TSGR proj. @ -8818 SSTVD @ 14800' MD(Crproj.) -8818 -8884 TSGR proj. @ -8828 SSTVD @ PTD (15212 MD) -8828 -8894 S-41 A& S-41 AL1 Sidetrack Page 7 Well Control Well control equipment consisting of 5,000 psi working pressure pipe rams (2), blind/shear rams, and annular preventer will be installed and are capable of handling the maximum potential surface pressures. Based upon calculations below, BOP equipment will be tested to 3,500 psi. BOP regular test frequency for S-41 will be 14 days during drilling phase and 7 days during decompletion and surface casing work. Production Interval Maximum anticipated BHP 3289 psi @ 8884'TVDss—TSAG (7.1 ppg EMW) Maximum surface pressure 2403 psi (.10 psi/ft gas gradient to surface) Planned BOP test pressure Rams test to 3,500 psi/250 psi. Annular test to 2,500 psi/250 psi S-41A 4 1/2" Liner Test 3500 psi surface pressure Integrity Test—6" hole FIT to 10.0 ppg after drilling 20'of new hole to satisfy ECD management concerns, however, an FIT of 8.8 ppg will provide an"infinite"influx volume with an 8.5 ppg mud weight in the hole. Planned completion fluids 8.5 ppg Seawater/6.8 ppg Diesel Other Request: Given rig floor height limitations, a MASP < 3000 psi, and the fact that the three ram drilling BOP configuration is preferred to a two ram configuration with a spool, BPXA will execute the provisions of 20 AAC 25.285 (f) (1) regarding the initial testing of the BOPE as follows when existing wellhead or testing equipment prevents the testing of the lowest set of pipe rams: That lowest set of rams will be tested at the earliest opportunity during path-forward de-completion work, i.e., after the completion has been pulled from the well. Safety concerns and spacing limitations with the wellhead height and tubing spool preclude us from installing a spacer spool in the three-ram drilling BOP stack. S-41 A&S-41 AL1 Sidetrack Page 8 Well Control The intermediate and production hole sections will be drilled with well control equipment consisting of 5000 psi working pressure pipe rams(2), blind/shear rams, and annular preventer. This equipment is capable of handling maximum potential surface pressures. Based upon calculations below, BOP equipment will be tested to 3500 psi. Notes: 1. BOPE and drilling fluid system schematics on file with the AOGCC. 2. Full ram tests are required when rams are changed. 3. BOP test frequency will be 14 days. 4. BOP function test frequency will be 7 days. Production Section Kick Tolerance and Integrity Testing • BOPE: Hydril, 13-5/8", 5000 psi • Maximum anticipated BHP: 3289 psi—TSHA(7.1 ppg @ -8884'TVDss) • Maximum surface pressure: 2401 psi—Based on a full column of gas @ 0.10 psi/ft • Planned BOP test pressure: 3500 psi/250 psi Rams and 2500 psi/250 psi Annular • 7" Casing Test: 4000 psi (Pre-rig) • 4'/" Liner Test: 2000 psi surface pressure test • Integrity Test—6" hole: FIT 20'—50'from 7"window • Kick Tolerance: Calculated an Infinite KT with a 8.5 ppg mud with 10.0 ppg LOT • FIT/LOT (10.0 ppg FIT/LOT needed f/ECD management) • Planned completion fluid: 8.5 ppg Seawater/6.8 ppg Diesel S-41A&S-41AL1 Sidetrack Page 9 Disposal: • No annular injection in this well. • Cuttings Handling: Cuttings generated from drilling operations will be hauled to grind and inject at DS-04. Any metal cuttings will be sent to the North Slope Borough. • Fluid Handling: Haul all drilling and completion fluids and other Class II wastes to DS- 04 for injection. Haul Class I waste to DS-04 and/or Pad 3 for disposal / Contact the GPB Environmental Advisors (659-5893) f/guidance. Fault Prognosis: S-41A will cross two faults along it's trajectory. The well path will kickoff SE of Fault D, cross Fault #'1 shortly after the KOP, pass to the west of Fault A before crossing Fault #2 and will then TD a couple hundred feet north of Fault B. Faults A, B and D should be avoided if drilling stays within the target polygon. Lost circulation risk for the area is considered moderate. The S-41 AL1 will cross Fault #1 shortly after the kick-off point. The well trajectory will kickoff to the SE of Fault D, cross Fault #1 shortly after the KOP, pass to the west of Faults#2 and B and will stop several hundred feet north of Fault C. Faults #2, B, C and D should be avoided if drilling stays within the target polygon. Lost circulation risk for the area is considered moderate. DRILL AND COMPLETE PROCEDURE SUMMARY Pre-Rio Operations: 1. F MIT-OA-2000 psi 2. 0 AC-LDS tubing,AC-LDS IC. Repair and replace as required. 3. C Clean out existing scale from production tubing.(Assure clean tubing all the way to XXN plug at 11,923'MD) 4. S Drift tubing. 5. S Drift and caliper 7"to 11,909' MD. 6. S Set plug in X nipple at 11,334' MD. 7. F CMIT-T x IA 4000 psi. (Need to evaluate whether well can be turned into an injector later.) 8. E Jet cut tubing -11,309'MD (in pup joint above packer at 11,311'MD). 9. F Circulate well to 1%KCL and freeze protect. 10. V Set BPV 11. V PT tree(MV,SV,WV) 12. 0 Bleed gas lift and production flowlines down to zero and blind flange 13. 0 Remove S-Riser, Remove wellhouse, level pad-Complete Rig Operations: 1. MIRU rotary rig. 2. Pull BPV. Circulate out freeze protection with seawater and condition fluid as needed. Set a TWC and test from below to 1000 psi and above to 2000 psi. 3. Bleed tubing hanger void and IA to zero. 4. Nipple down tree and tubing head adapter. 5. Nipple up and test BOPE from above to 3500 psi high/250 psi low. Pull TWC. 6. RU and pull production tubing from the pre-rig jet cut. Test the lower set of pipe rams. Inspect all completion equipment for NORM. 7. Mill packer at 11,311'MD. 8. Fish tubing tail. 9. Mill packer at 11,909' MD. Push tubing tail to bottom (Top of fish -12,209' MD) S-41 A&S-41 AL1 Sidetrack Page 10 10. PU casing scraper w/string nulls and make 7"casing scraper run to 12,2ta MD. 11. RU Eline. Run USIT. Set bridge plug CO -12,200' MD. Run CBL/Perforate(-10') @- 12,185' MD for cement squeeze path. 12. RIH with drillable Cement Retainer and set at--11,800'MD 13. Test for injectivity/squeeze cement. 14. Set RTTS. Test. 15. ND BOPE. 16. Change 7" IC packoffs. (IA 17. NU BOPE. 18. Retrieve RTTS. u -u-1 I • -u-1 - ..1- -s• -.• • -11-1 • ... 11 i41 20. Set whipstock. Mill window. 21. Drill 6" hole to TD. 22. Run 13-Cr 85 solid liner. 5-411/A 23. Cement liner. Set liner top packer.Test liner to 3500 psi. 24. Perforate liner. 25. Set retrievable whipstock in seal receptacle at-11,932'MD. 26. Mill window. 27. Drill 6"open hole to TD. 28. Run slotted liner, leave TOL 10'outside window. 29. Retrieve whipstock and seal assembly. T i5 30. R/U and run a 4-1", 12.6#, 13 Cr, VAMTOP STADDLE completion w/sliding sleeve and DCK shear ?t'1) out in GLM#4. Space out and land tubing. 31. Circulate freeze protect down IA. 5-4104.1 32. Drop ball and rod to set packer. RILDS. 33. Individually test the tubing and annulus to 3500 psi for 30 minutes and record each test. When testing IA, assure tubing still pressured to 1500 psi to prevent DCK shear valve shearing. 34. Shear out DCK. 35. Install and test TWC test from below to 1000 psi through sheared DCK. 36. N/D the BOPE. N/U the adapter flange and tree and test tree and adapter to 5,000 psi with diesel. 37. RU DSM. Pull TWC. 38. Rig up flow path for IA freeze protect to U-tube the diesel freeze protect into place through the tree. 39. Install and test a BPV. 40. Secure well/RD and move-off well. Post-Rio Operations: 1. MI/RU slick line. Pull the ball and rod/RHC plug from landing nipple below the production packer. 2. AOGCC MIT-IA POST POI (per WIC) (injector) 3. Install the well house, instrumentation, and flow line. (NOTE: This work will be completed under a separate AFE.) S-41 A&S-41 AL1 Sidetrack Page 11 S-41A and S-41 AL1 Drilling Hazards and Contingencies POST THIS NOTICE IN THE DOGHOUSE I. Well Control/Reservoir Pressures: Possible low reservoir pressure as drilling toward R-19. This well will be shut-in prior to drilling S-41A and S- 41 AL1. II. Lost Circulation/Breathing: Moderate risk for lost circulation for both laterals. III. Kick Tolerance/Integrity Testing: Production Section Kick Tolerance and Integrity Testing • Integrity Test—6"hole: FIT 20'—50'from 7"windows • Kick Tolerance: Calculated an Infinite KT with an 8.5 ppg mud with 9.0 ppg FIT/LOT (NOTE: Need a 10.0 ppg FIT/LOT to satisfy ECD management requirements.) IV. Stuck Pipe Avoid drilling out the top of Sag River. Possible stuck pipe conditions above the Sag. V. Hydrogen Sulfide S Pad is considered an H2S Pad,it is expected that the on-site team will follow Standard Operating Procedures for H2S at all times. Well Name H2S Level 'Date of Readi #1 Closest SHL Well H2S Level S-42(SI) 70 ppm 5/14/2006 #2 Closest SBL Well H2S Level S-43 30 ppm 11/25/2009 #1 Closest BBL Well 112S Level R-19A 24 ppm 4/12/2008 #2 Closest BHL Well H2S Level S-43 30 ppm 11/25/2009 #1 Closest Kaparak BBL Well H2S Level #2 Closest Kaparak BHL Well H2S Level Max.Recorded IDS on Pad/Facility S-201 500 ppm 06/02/05 Other Relevant H2S Data The max recorded H2S for S-41._was 20 ppm on (H2S alarms from rigs,etc.) 5/18/03.Last H2S reading on 5-41 was 10 ppm on sn nia VI. Faults S-41A will cross two faults along it's trajectory. The well path will kickoff SE of Fault D,cross Fault#'1 shortly after the KOP, pass to the west of Fault A before crossing Fault#2 and will then TD a couple hundred feet north of Fault B. Faults A, B and D should be avoided if drilling stays within the target polygon. Lost circulation risk for the area is considered moderate. The S-41 AL1 will cross Fault#1 shortly after the kick-off point. The well trajectory will kickoff to the SE of Fault D, cross Fault#1 shortly after the KOP, pass to the west of Faults#2 and B and will stop several hundred feet north of Fault C. Faults #2, B, C and D should be avoided if drilling stays within the target polygon. Lost circulation risk for the area is considered moderate. CONSULT THE H-PAD DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION S-41A&S-41AL1 Sidetrack Page 12 TREE= 4-1116"CAN WELLHEAD= FMC SAFETY NOTES: BEFORE RUNNING 1'BTM.LATCH ACTUATOR= BAKER S-41 L 1 RUNNING HEAD NEEDS TO BEMOVI33 UP 11112'WELL LEV. (B.ELEV= 71.2' •70 DEG Q 12100'S>90 DEG a 12654'. BF.ELEV= 37' - KOP= 1131' Max Angle= 50®8135' 0 2 21 5' —141/7 HES HXO SSSVN,D=3.813' Datum MD= 11852' Datum NO= 8800'SS GAS LIFT MANDRELS - - ST MD ND DEV TYPE VLV LTCH;PORT DATE 9-5B"CSG,40S,1-80,0=8.835" H 3332' 6 4072 3482 49 KBG-2LS DOME BIN 16 05/10/96 5 6622 5169 48 KBG-2LS DOME BTM 16 05/10/96 © 14 8131 6199 45 KBG-2LS DV BTM 0 05/10/96 3 9206 6941 48 KBG-2LS DOME BTM 16 05/10/96 2 10280 7672 46 KBG-2LS DV BIM, 0 05/10/96 Minimum ID= 3.725" @ 11923' ∎ 1 11233 8329 46 KBG-2LS S/O BIM 24 05/10/96 4-1/2" HES XN NIPPLE (NOTE PROBLEM MANDRELS;REQUIRE SPECIAL VALVES I IA 11300' —14112'HES X NP,ID=3.813" I 11311' I_17'x 4-12"BKR S-3 PKR,ID=3.875" 1 11334' —141/2"HES X NP,ID=3.813' I 1 11355' H4-1Q"HES XNIP,ID=3.813" I 4-1/7 TBG,12.611,L-80,.0152 bpf,D=3.958" H 11366' / \ 11367' 41/2'WLEG,ID=3.958" I I 7"CSG 26i X 7"CSG 29R XO H 11371' x T 11372' H ELMO 7'CSG PAL LOUT WINDOW RA PIP TAG — 11782' - • // 11892'-11905' (5-41 L1) 11921' —IBKR SETTNG SLV,D=5.250" I � — 11948' —I TOP OF4-12'SLTD LNR I 7 x4-1/2"BKR ML PKR,D=3.880" —I 11909' :2d4L'--'s-. I 412'XXN PLUG N XN NP(SET 04/05/98)(SLM) I 11897' � `` -- I 4-1/2"HES XN NIP,ID=3.725" —I 11923' ® ```� s ```� 4-112'WLEC,0=3.958' H 11931' i '841 Li IS AN OH SLIDLNR ```��� 7 W/O LNR TOP PKR OR HGR. 1 RA PIP TAG —I 11987' '_0 l I WELL NOT W..ACCESSIBLE 7'X 4-12'TAN SS PKR,ID=3.915" H 12229' —'g " 4-1/7SLTDLNR,12.6*,L-80,.0152bpf,ID=3.958' —I 14035' I TOP OF 4-1/7 SLOTTED LNER H 12235' I I I l I 7'CSG,291,L-80,.0371 bpi,D=6.184' h 12409' I` , PERFORATION SUMMARY I .. ` REF LOG SLOTTED LINER . ER .. . ANGLE AT TOP PERF:70®11948' �'. .-''. Note:Refer to Production OB for historical perf data -, s` SIZE SPF NTERVAL Opn/So7 DATE 5. .. 8-41 L1 4-1/2" SLTD 11948-14005 0 0402/96 `s-. \'. 9-41 '.. ; 4-1/2' SLID 12235-13865 0405198 . . 4-i2 S.i L., '26r,L-o0,.0I JrLP',1D-3.a!o I I 3007 DATE REV BY i COMMENTS I DATE /4EV BY MENTS UNIT 04102196 ORIGINAL COMPLETION � 0102/07 RCT/TLH PROB GLV CORRECTION WELL: S-41L1 03/26/02 CH/KAK',CORRECTIONS 05/1308 SWC/TLH WRP FULLED PERMIT No: 1960250 1006102 JAL/KK 'WAIVER SAFETY NOTE I AR No: 50-029-22645-60 05/02/03 PP/KAK I WELL NAME 8 AR*REV. i SEC 35,T12N,R12E;4152'FSL 8 4504'FEL 02/21106 RPHITLH 1 WAIVER SFTY NOTE DELETED i 11/05/06_JLJ/TLH IWRPSET BP exploration(Alaska) S-41A & S-41 AL1 Sidetrack Page 13 . . TREE= 4.-v16'CAN WELLHEAD= FMC A-4 1 A & A L J SAFETY NOTES: V1 1CTLIATOR= BAKER •f ELEV 71.2' I3F.ELEV= 37' - I(OP= 1131' Max Angie= 50®8135' i , MD= 11852' I -2200' H4-1/2'HES X Fipple,O.3813' DatianlVD= 8600'SS G SLFTM4NORRS Datum j sr MD 1VD DEV TYPE VLV ITCH PORT DATE 9-518'CSG,409,L-80.ID=8.835' --I 3332' II.4 3742 3332 47 KBG 2L5 BTM a 0 3 7108 5588 48 KBG-2L3 BTM 2 9716 7354 47 KBG-2LS BTM e 0 1 11575 8752 62 KBG•2LS BTM . 1 Minimum ID= 3.725"ft 11937' 4-112" HES RCN NIPPLE 7'CSG 269X7'CSG 299 XO H 11371' , X X F I 11660' 114-1/2"HE XMP,ID=3.1113"1 1 11673' I-T"x 4-112"HES TNT R(R,D=3 356"_ II 4 I 11700' H4-1/2"HES x NP,ID=3913' I 1 �� 11715' --I Sias pocket mandrel for RA RP TAG H 11782' 9�9e ■ 11735' H BKR 4-1/1"13-Cr Sliding Serve I 7'CSG MLLOUT WNDOW / ( ' 11892'-11905' (3-41 L1) 7' retr.whipstock H -11,932' 11921' RBKRSETTNGSLV,0=5.250' I 11948' I-TOP OF41/2'SLTD LNR , 1 - - - , 172"SLTDLNR12.89,L-80,.01:52bpf,D=3.958' 15,217 I.- RA RP TAG H— 1987' ____ / I 4-12" LTD LNR-1i!.69,L-80,.0152,bpf'D=3.958'I- 14035' I �. _-___ .�...:�-r '.-b cksleeveD=5.25 11969' / r ____ 4 - - — 442'HE!9C r 3Ol NIP,ID=3.725' 412'T= 12.6*13 Cr-25,'.13152 bpf,D=3.98H 11979' I E I 5x7'BAKER FMC Liner Hunger ID=4.43' H 11994' I ` _ - 7°yr hipstock - --13,033 :^ I Top of Fish I- 12,209' --1' !Parrs for cement sox H -12,195' I Permanent Bridge Plu -12,000' 1 I T X 4-117'TNV SS PKR,D=3.915' 1-I 12229' I— 1 „ 4-1 Sabel LNR,12.69,13-Cr 85, =3.958' (-[ 15,392' TOP OF 412'SLOTTED LNER H 12235' I t7i D 1 l I 1 I 7'CSG,299,L-80,.0371 bpf,ID=6.184' H 12409' I - -_ _ 1 I 4-12'SLTD LNR,12.89,L-80,.0152 bpf,113=3.958' H 13867' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUGHOE BAY L 1T 04/02/96 ORIGNAL COMPLETION 01102/07 RCTITLH PROS GLV CORRECTION WELL S 41A&AU 03/2602 O-l7KAK CORRECTIONS 05/13/08 SWCI'TLH WRPPULLED PERMITNo:1960250 10/06102 JAL KK WAWERSAFETY NOTE APINo: 50-029-22645- 05/02703 PP/KAK WELL NAME&API 9 REV. SEC 35,T12N,R12E,4152'FSL&4504'FEL 02/21/06 RP1/11H WAVER SFTY NOTE DaL i hi) 04/08/10 MGR A and AL1 New Sidetracks BP Ekploration(Alaska) S-41A& S-41 AL1 Sidetrack Page 14 0 01^ d ABC) NN QQ 2Q OE O1P10 8g2.88 C? N P 1 d m A ,Q2'4,n A -N m m N 4.V22% 0 0 0 0 0 r oCO N-Cm 0ON-N O �uiCO OO n 06CN r eoN r vi01 0I N MO^AO m°1� g:2 i0mm N NN dpA CO OV°avant dOdOa maa<M MM�linin inl... 000. �6 mtN°tNmtN°m tN°tN°<N°m OO mmtN°rotNm m tNOmmm tNmm romm tNmmgcO d 0_ CV W^ 7 In A ON 1 A ON I N A m In m O m N m 'm 7! N 2::i N N O N m W Q O O 01 m O Y OmO 7mN 01 Omm^ 100010 V 2 mNNpm Hill O<01 d N m m m 0,M m m N N N N N N O N NN NOHNN N N0n Y NNNnn wo NN N M 4 m m^ OGY,PI ONPIp N N Oc7Nm mtp ON RmPl EO0 CO�C�. v>mNm NO d0 and dd 000�f^O m m d OmPIO 106 NN0Nt0 o00mn nAn n000 me ct,tot mm cDaDO 00cm0aD 0 O M it CO m c O N o c 0 m T4 p �p w x NN NN0 t1a a v e .1.IN NiA N NtGtm0tm0 fo° rnn nrAn =.80 420 ..... m m m fG lG tG O tG t0 O tC O O tG Vj O O tG O O .... d Z' -15 . C O m. 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S m 0 A L C�'0 0 q aQ a- aY9 9 u 3 J Jm 4) L a J m m>> m w a w 0 O O m n)U f/)J O m>>1-1-(021-2 f z0HJ m CO N L d j mO�N°a mtN mmm2Y42. ooNm o 2'42o 2282 o N•70CC t0 f ONfN 1 30, 88.c; Om0AM p,cic '.O1OO NN0. a mmm mmm mm mmmmm ...mm omommmmm omm m oo om m z 1 AO Q 1 E 0 v N N O.-A 01� 0 0,0 0...0 O aO000 r 1 ..- .1N 0., u OW, O O0 O m A N A 7 a N O O C N A O N m m O W A 67 A . y ,)_' 2213S 182@g 82%t32 22E31 Z3322 2223 W MIN h1LJIH C A _ 7 m a N HH 7 D 301 ?: o^ m V N P= N O N O 80 0 p`r i iO Odp yy U z N W~ m m m NiON<Nh COOCOOA 010010101 COO A d F¢��a 6 N C M E -- O ccco zN 110 N O W ¢ Q6 N 3 e 02 A 2 m 0 NS m O O O 0 0 yy 0 S N M o oN N 0 C m m G O md 7. Ma01 O A mmmmm ^mmm0 mmmm 0,01000, mmmmm m. m sgs K O q ° A N O LL m LL m Q N O€d' _ pA m Om U M mOl pp C CO 2 O N 4O 3 m Qz z co E a M N 0 ❑r CO O o o 0o om x0000N,000 r 0 N- O N0 f soA O Oa m O 0 C�lJ D o 00 000 000 .O 0 °01 aA O 86883 66006 N,O ,-poN8 0,O mg °01 O S w 0 ^0 d20 NN SP-888 80 mmC N C7d O rn O pN 2 Nn ON N 5;P::- o N NNN NN NN8NP CO d d CO d d d d O d. M M O N 0(0 7,O 4 O a 0) (0 Q o u m N J 05 m T o Wm wc..o. NCO 6E = OWMOdm d p O O 0 O N 2N u. 666.. 0 CLO N EECg vaLL o� N O 01“101 w 3y w w0°.nC7 a m ^1 Zxg" °$f ^ O C m 6 Z O� Q c c c m c o.t o o _ 0 1`y 0. - .1.. O T>w 8 0 0 0 0 41 to° Z 0 J Z 0 Z 0 J T T g.0,° °- @ Z Z C$ u 1°3? E c a m Ua U v <04 �_ U a¢ g U o S co @ w2mo3 > > 0 00 o 41066010 o a t <°ct qq'' 01 0) t0 K aLtm;msm W h(7JJU' U' U HHmY m W U .0 co WUm m W� NN Q o o ) ) ..._ { o a - 3 ( } MN \ CID \/ o / o CD CID `f 3 E R g GC - ° ... 7 § j co \ } \ I I C ,.5 g \ !;; -- a / � CO §§! ' ' / 2 \/ co 0 / 3 CL , o 1z , f E. ] 5 L=. 4! \ ) a a a k .. ; o > , § 3 ) -a 0 7,,z., a ` 71 ` . \ \(_ ;s!} \ « | 1. ; 1 • _ @ |) Egg ■41114 k ] ƒ! 2 0 - . / | .. § co m«mWL.=alemaA1 by 0 Schlumberger S-41AL1 (P4) FIELD Prudhoe Bay Unit-WOA I S RUC7URE S-PAD Magnets Parameters Surface Loeaeon NAD27 Alaska Slate Plane.Zone 04.05 Feet MSsebSs t Model BGGM 2009 DO 80.935• Date Ma.31.2010 Let N 70 21 17932 Nw1Ng 5980356.93 BUS Gsitl Caa:0.90961380• TVD Ref. Rotary Table(6550 above MSL) Mag Dec'. 22.105• FS'. 57680011 Lon: W149 2 3045 Easbne 618930.12 INS Scab Fact:0.99991607 Plan: S-41AL1(Pd) Spry Date'.Mar.31.2010 5500 6000 6500 7000 7500 8000 —4 -410 4-112"Lnr S-41PB1 S-41 4-1/2'Lnr 5000 5000 /2.2.V r Ceg 96°Pt S-01 P' End Cry 4500 - Ate. 4500 S-41 KOP Cry 25/100 • Tie-i Survey Bass Whipstock Cry 4/100 �p•'. To Whipstock 4000 s• a 4000 A A S•41AL1 Tgt 1 Z End Cry O O U) C_ 3500 -- 3500 a, U C) V V V 3000 3000 Cry 4/1 o0 S-41AL1 Tgt2 -41A(P6) 2500 - - t-- 0 2500 End Cry Cry 4/100 S-41AL1 Tgt 3 2000 End Cry 2000 TD S-41AL1(P4) 5500 6000 6500 7000 7500 8000 c<< W Scale=1(in):500(ft) E >>> BPPASSPORT- Knticollision Report — Company: North America-ALASKA-BP Local Co-ordinate Reference: Well S-41 Project: Prudhoe Bay ND Reference: S-41A Plan @ 65.50ft(Nabors XES) Reference Site: PB S Pad MD Reference: S-41A Plan @ 65.50ft(Nabors XES) Site Error: 0.00ft North Reference: True Reference Well: S-41 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan S-41AL1 Database: EDM.16-Anc Prod-WH24P Reference Design: Plan#4 S-41AL1 Offset ND Reference: Offset Datum Reference Plan#4 S-41AL1 Filter type: GLOBAL FILTER APPLIED:All wellpaths within 200'+100/1000 of refen Interpolation Method: Mifinterv-aT5.00ft Error Model: ISCWSA Depth Range: 11,932.00 to 15,211.80ft Scan Method: Tray.Cylinder North Results Limited by: Maximum center-centerdis Error Surface: - Elliptical-ConiE Survey Tool Program Date 4/13/2010 From To (ft) (ft) Survey(Welibore) Tool Name Description 142.60 9,379.37 S-41P91 Srvy#1 MWD(S-41PB1) MWD MWD-Standard 9.473.01 11,929.64 S-41 Srvy 2 MWD(S-41) MWD MWD-Standard 11,929.64 15,211.80 Plan#4 S-41AL1 (Plan S-41AL1) MWD+IFR+MS MWD+IFR+Multi Station 1 4/13/20T(4:17:31 PM Page 2 of 5 COMPASS 200316 Build 71 - - BPPASSPORT Antlic li ion Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well S-41 Project: Prudhoe Bay TVD Reference: S-41A Plan @ 65.50ft(Nabors XES) Reference Site: PB S Pad MD Reference: S-41A Plan @ 65.50ft(Nabors XES) Site Error: 0.00ft North Reference: True Reference Well: 5-41 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan S-41AL1 Database: EDM.16-Anc Prod-WH24P Reference Design: Plan#4 S-41AL1 Offset TVD Reference: Offset Datum Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well-Wellbore-Design (ft) (ft) (ft) (ft) PB R Pad R-20-Plan R-20B-Plan#4 R-20B 15.197.91 16,165.00 861.85 317.11 569.60 Pass-Major Risk R-20-R-20A-R-20A 13,415.79 16.885.00 473.18 418.20 55.07 Pass-Major Risk PBS Pad S-101-S-101-S-101 Out of range S-101-S-101PB1-S-101 Wp 7 Out of range S-101-S-101 PB1 -S-101 PB1 Out of range S-102-Plan S-102A-Plan#2 S-102A Out of range X192=�f02-S=102 S-102-S-102L1-S-102L1 Out of range 5-102-S-102L1 PB1-S-102L1 PB1 Out of range S-102-S-102PB1-S-102PB1 Out of range S-108-S-108-S-108 Out of range Out of range- S-109-S-109-Plan#6 Out of range S-109-5-109-S-109 Out of range S-109-S-109PB1 -S-109PB1 Out of range S-110-Plan S-110A-Plan#7 S-110A Out of range Plan-S 1-1-0AL1-do not-use—Plan-#2 S 11C Out of-range 5-110-S-110-S-110 Out of range 5-112-S-112-S-112 Out of range -S-112-S=i12 Wp0T Out of range -- - S-115-S-115-S-115 Out of range S-116-S-116-S-116 _ - —_—_--- -___-- Qutof range S-117-S-117-Plan#3 Out of range S-117-S-117-S-117 Out of range S-118-S-118-S-118 Out of range S-12-S-12-S-12 Out of range S-120-S-120-Plan#4 __- _-_ Out of range S-120-S-120-S-120 Out of range S-121-S-121-Plan#10 Out of range 121 5-424-5--121 — — Outof-range S-121-S-121 PB1 -Plan#3 Out of range S-121-S-121 PB1-S-121 PB1 Out of range S-122-S-122-Plan#6 - Out of range 5-122-5-122-S-122 Out of range S-122-5322PB1---Plan-#4 —— — - — Out of-range S-122-S-122PB1-S-122PB1 Out of range S-122-S-122PB2-S-122PB2 Out of range S-122-S-122PB3-S-122PB3 Out of range S-124-S-124-S-124 Out of range S-125-S-125-S-125 Out of ran e S-125-S-125PB1-S-125P61 Out of range S-200-S-200-5-200 Out of range 200=S•-200PB1=5=200PB1 Out-of-range S-213-S-213-5-213 Out of range S-213-S-213A-S-213A Out of range_----- S-213-S-213AL1-S-213AL1 Out of range S-213-5-213AL1-01-5.213AL1-01 Out of range S-213-S-213AL2-S-213AL2 Out of range 5-213-5-213AL3-S-213AL3 Out of range S-216-S-216-S-216 Out of range S-35-S-35-S-35 Out of range r • r : : -r Page 3 of 5 COMPASS 200316 Build 71 — -_ AnlFcollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well S-41 Project: Prudhoe Bay TVD Reference: S-41A Plan @ 65.50ft(Nabors XES) Reference Site: PB S Pad MD Reference: S-41A Plan @ 65.50ft(Nabors XES) Site Error: 0.00ft North Reference: True Reference Well: S-41 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan S-41AL1 Database: EDM.16-Anc Prod-WH24P Reference Design: Plan#4 S-41AL1 Offset TVD Reference: Offset Datum Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well-Wellbore-Design (ft) (ft) (ft) (ft) PB S Pad S-400-S-400-S-400 Out of range S-400-S-400A-S-400A Out of range S-401-S-401-Plan#15 Out of range S-401-S-401-S-401 Out of range ' S-401 -S-401 PB1 -Plan#10 Out of range S-401 -S-401 PB1 -S-401 PB1 Out of range S-41-Plan S-41A-Plan#6 S-41A 11,959.98 11.960.00 0.77 2.23 -1.30 FAIL-Major Risk S-41-S-41-5-41 11,959.37 11,965.09 0.75 5.11 -1.34 FAIL-Major Risk S-41-S-41 L1-S-41 L1 11,934.29 11.940.00 1.10 6.32 -3.92 FAIL-Major Risk S-41-S-41PB1-S-41PB1 12.000.00 11,955.00 126.08 159.35 -20.18 FAIL-Major Risk S-42---S-42 -S-42PB1 -S-42PB1 Out of range S-43-S-43-S-43 Out of range S=43L-1---S43C1=&43L1 — — Out of range S-44-S-44-S-44 Out of range S-44L1-S-44L1-S-44L1 Out of range S-44L1PB1-S-44L1PB1 -S-44L1PB1 Out of range 4/13/2D10 4:17:31 PM Page 4 of 5 COMPASS 2003.16 Build 71 Project: Prudhoe Bay — Site: PB S Pad Well: S-41 Wellbore: Plan S-41AL1 Design: Plan #4 S-41AL1 From Surface to TD Scan interval 100 ft Scale 1 : 100 S-41 PB1 Fails major risk Passes 1:20 risk rule 0 S-41,S-41 PB1 350 330 S-41/S-41 12 40 300 .olor.''''''-40",4ie S-41/S-41L1 411)***/ / 300 12080 /`2180 r/ 60 1202Vir /#11°,e / fig) Ifr ,/ 4•S-41 rPlan*6 2160 11::?' •43 12288 12335 `� 0 '1i a1 t 11998 270 01993 90 \� \ \ \\ ,o1 * k/‘ . NOP „,,,,,. 240 120 2051 - -,50 II 1t ---- 150 - till---- 180 Travelling Cylinder Azimuth (TFO+AZI)['] vs Centre to Centre Separation [100 Win] Alaska Department of Natural P -ources Land Administration System Page 1 of// %Alaska Mapper Land Records/Status Plats Recorder's Search State Cabins Natural Resources I- Alaska DNR Case Summary File Type: ADL File Number: 28257 Printable Case File Summary See Township,Range, Section and Acreage? New Search 0 Yes 0 No LAS Menu I Case Abstract I Case Detail I Land Abstract File: ADL 28257 i'Aa►L Search for Status Plat Updates As of 08/02/2010 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E. BENSON BL ATTN: LAND MANAGER- ALASKA ANCHORAGE AK 995196612 Case Type: 784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location: DOG DIV OIL AND GAS Case Status: 35 ISSUED Status Date: 08/11/1965 Total Acres: 2560.000 Date Initiated: 05/28/1965 Office of Primary Responsibility: DOG DIV OIL AND GAS Last Transaction Date: 12/04/2006 Case Subtype: NS NORTH SLOPE Last Transaction: AA-NRB ASSIGNMENT APPROVED Meridian: U Township: 012N Range: 012E Section: 25 Section Acres: 640 Search Plats Meridian: U Township: 012N Range: 012E Section: 26 Section Acres: 640 Meridian: U Township: 012N Range: 012E Section: 35 Section Acres: 640 Meridian: U Township: 012N Range: 012E Section: 36 Section Acres: 640 Legal Description 05-28-1965 ***SALE N O T I C E LEGAL D E S C R I P T I O N 'K' ' C14-52 12N 12E UM 25,26,35,36 2560.00 04-01-1977*** UNITIZED LEGAL DESCRIPTION*** PR UDHOE BAY UNIT ESTABLISHED T 12 N., R. 12 E., U.M. http://dnr.alaska.gov/projects/las/Case Summary.cfm?FileType=ADL&FileNumber=28257... 8/2/2010 TRANSMITTAL LETTER CHECKLIST WELL NAME 'i/Az/ PTD# o?/OIDa? Development Service Exploratory Stratigraphic Test Non-Conventional Well FIELD: /V,e4/4A74DE ZrAlY POOL: ,Be fi/4 / O'L Circle Appropriate Letter/Paragraphs to be Included in Transmittal Letter CHECK ADD-ONS WHAT (OPTIONS) TEXT FOR APPROVAL LETTER APPLIES MULTI LATERAL The permit is for a new wellbore segment of existing / well "Pee/ �/ (If last two digits in Permit No.o?/O/G ,API No. 50-a? 2 2 S O/ . API number are between 60-69) Production should continue to be reported as a function of the original API number stated above. PILOT HOLE In accordance with 20 AAC 25.005(f), all records, data and logs acquired for the pilot hole must be clearly differentiated in both well name ( PH) and API number (50- - - ) from records, data and logs acquired for well SPACING The permit is approved subject to full compliance with 20 AAC EXCEPTION 25.055. Approval to perforate and produce / inject is contingent upon issuance of a conservation order approving a spacing exception. assumes the liability of any protest to the spacing exception that may occur. DRY DITCH All dry ditch sample sets submitted to the Commission must be in SAMPLE no greater than 30' sample intervals from below the permafrost or from where samples are first caught and 10' sample intervals through target zones. Non-Conventional Please note the following special condition of this permit: Well production or production testing of coal bed methane is not allowed for (name of well) until after (Company Name) has designed and implemented a water well testing program to provide baseline data on water quality and quantity. (Company Name) must contact the Commission to obtain advance approval of such water well testing program. Rev: 1/11/2008 J , I Ca Cr) 0) 0 N O- N !_n a) ° O @ — 7 To c Q c O a) O > t 0 w 3 ° O E c m a E O o. 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