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If perforating: 1. Type of Request: 2. Operator Name: 3. Address: 4. Current Well Class:5. Permit to Drill Number: 6. API Number: 8. Well Name and Number: 9. Property Designation (Lease Number):10. Field/Pool(s): Abandon Suspend Plug for Redrill Perforate New Pool Perforate Plug Perforations Re-enter Susp Well Other Stimulate Fracture Stimulate Alter Casing Pull Tubing Repair Well Other: Change Approved Program Operations shutdown What Regulation or Conservation Order governs well spacing in thes pool? Will planned perforations require a spacing exception?Yes No 11. Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD: Effective Depth TVD: MPSP (psi):Plugs (MD):Junk (MD): PRESENT WELL CONDITION SUMMARY Perforation Depth MD (ft): Perforation Depth TVD (ft):Tubing Size: Tubing Grade: Tubing MD (ft): Packers and SSSV Type:Packers and SSSV MD (ft) and TVD (ft): Casing Length Size MD TVD Burst Collapse Exploratory Stratigraphic Development Service 12. Attachments: 14. Estimated Date for Commencing Operations: 13. Well Class after proposed work: 15. Well Status after proposed work: 16. Verbal Approval: 17. I hereby certify that the foregoing is true and the procedure approved herein will not be deviated from without prior written approcal. Proposal Summary Wellbore schematic BOP SketchDetailed Operations Program OIL GAS WINJ WAG GINJ WDSPL GSTOR Op Shutdown Suspended SPLUG Abandoned ServiceDevelopmentStrastigraphicExploratory Authorized Name: Authorized Title: Authorized Signature: Date: Contact Name: Contact Email: Contact Phone: COMMISSION USE ONLY Commission Representative: Conditions of approval: Notify Commission so that a representative may witness Sundry Number: Location ClearanceMechanical Integrity TestBOP TestPlug Integrity Other: Post Initial Injection MIT Req'd? Spacing Exception Required?Yes Yes No No Subsequent Form Required: Approved By:Date: APPROVED BY THE COMMISSIONCOMMISSIONER PBU W-31A Extended Perf w CTU Hilcorp North Slope, LLC 3800 Centerpoint Dr, Suite 1400, Anchorage, AK 99503 208-136 50-029-21900-01-00 341H ADL 0028262 12039 Conductor Surface Intermediate Liner Liner 8812 80 2659 9764 1275 1255 11951 20" 13-3/8" 9-5/8" 7" 4-1/2" 8867 31 - 111 29 - 2699 28 - 9792 9659 - 10934 10783 - 12038 2701 30 - 110 29 - 2699 28 - 7739 7655 - 8680 8547 - 8813 None 2260 4760 5410 7500 None 5020 6870 7240 8430 11109 - 11896 4-1/2" 12.6#13Cr80 26 - 107918827 - 8900 Structural 4-1/2" Baker S3 Packer No SSSV Installed 10714 8487 Date: Stan Golis Sr. Area Operations Manager Torin Roschinger Torin.Roschinger@hilcorp.com 406.570.9630 PRUDHOE BAY, PRUDHOE OIL 9/6/2021 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVALS 20 AAC 25.280 Comm.Comm.Sr Pet Eng Sr Pet Geo Sr Res Eng Form 10-403 Revised 3/2020 Approved application is valid for 12 months from the date of approval. By Samantha Carlisle at 2:14 pm, Aug 24, 2021 321-421 Digitally signed by Stan Golis (880) DN: cn=Stan Golis (880), ou=Users Date: 2021.08.24 13:44:15 -08'00' Stan Golis (880) SFD 8/24/2021 SFD 8/24/2021, ADL 0028263 DSR-8/25/21MGR31AUG21 10-404 dts 8/31/2021 JLC 8/31/2021 Jeremy Price Digitally signed by Jeremy Price Date: 2021.08.31 18:04:15 -08'00' RBDMS HEW 9/1/2021 Add/Re-Perfs & SIT W-31A PTD:208136 Well Name:W-31A API Number:50-029-21900-01 Current Status:Online Producer Rig:Coil/Eline/Fullbore Estimated Start Date:September 2021 Estimated Duration:4days Regulatory Contact:Abbie Barker Permit to Drill Number:208136 First Call Engineer:Torin Roschinger (406) 570-9630 (c) Second Call Engineer:Brian Glasheen (907) 545-1144 (c) AFE Number: Current Bottom Hole Pressure:3,581 psi @ 8,800’ TVD 7.9 PPGE Maximum Expected BHP:3,581 psi @ 8,800’ TVD 7.9 PPGE Max. Anticipated Surface Pressure:2,701 psi (Based on 0.1 psi/ft. gas gradient) Last SI WHP:1,990 psi on 8/22/2019 Min ID:3.725” at XN Nip @ 10,779’ MD Max Angle:128 Deg @ 12,039’ MD Tie-In Log: W-31A SLB MDL 21-Sept-2008 Brief Well Summary: W-31A is a horizontal Ivishak producer completed in 2008. It has cum’d 1.1 mmbo to date and is currently making 136 bopd @ 69% WC and 1900 GOR. It is a “U” shaped well, perf’d in the heel and toe, as the lower intervals in the middle of the well appeared to be wet when drilled. The heel is perf’d up to 8747’ TVDss, while the toe is only perf’d to 8825’ TVDss, leaving uphole addperf potential in the toe with fluid cuts expected to be comparable to the well’s current performance. In addition to this, there are several unperf’d 45P stringers in the heel totaling 15 – 25’ MD which would be e-line accessible. In 2017, 32' of 46P toe perfs were attempted (~11,925') but coil tagged high at 11,551'. They managed to jet down to 11,600' and were pretty confident it was fill. A FCO was not attempted and they cancelled the toe perfs. The existing toe perfs begin at 11686’ MD so it’s likely they’re covered in fill and baffled, if contributing at all. Though slickline hasn’t had issues drifting the well historically, on 2/8/2018 scale was recovered from the screened orifice indicating that scaling is an issue in the well and likely the culprit of the obstruction in the liner that coil encountered in the liner in 2017. Objective: The objective of this program is to clean the liner out to PBTD (11951’ MD) so that add/re-perfs can be shot. After the perforations have been shot an SIT treatment will be performed to reduce scaling in the near wellbore area. Well Testing 1. MIRU Test Unit and auxiliary equipment. a. RU so that after the clean out the test unit can RD and leave location while coil completes the remaining logging and perforation work. b. Work with the Pad Operator to choose return well. Confirm return well is lined up into LP for clean out. Sundry Procedure (Approval Required to Proceed): Add/Re-Perfs & SIT W-31A PTD:208136 Note: The well will be killed and monitored before making up the initial perfs guns. This is generally done during the drift/logging run. This will provide guidance as to whether the well will be killed by bullheading or circulating bottoms up throughout the job. If pressure is seen immediately after perforating, it will either be killed by bullheading while POOH or circulating bottoms up through the same port that opened to shear the firing head. Pre-Job Prep 1. Prior to CT or EL RU, verify that SIT chemicals are in stock and the SIT can be performed by Fullbore immediately after the final perf guns are shot. Do not POP the well until the final guns are shot and SIT treatment is pumped. 2. Confirm the well is flowing through the ASRC test separator before RU. Coil Tubing 2. MIRU CT Unit and auxiliary equipment. 3. MU 2-7/8” motor w/ a 3.70” mill to remove scale. Confirm the mill doesn’t have side cutting structure. RIH until fill/obstruction is encountered and begin milling while pumping gel sweeps as necessary cleaning out to PBTD, ~11951’. Once at PBTD, pump a 20-30bbl gel pill and chase OOH at 80%. Once final gel pill is seen at surface, SI the lift gas and let the well bleed off to LP while POOH. a. On 7/29/2017, coil encountered fill in the liner @ 11612’, but didn’t attempt a FCO. b. Have the well testers regularly collect samples to determine the substance of debris. Note in AWGRS. If it’s scale, return it to the GPB Lab for a solubility test. 4. Bullhead 220 bbls of KWF, 8.4 ppg brine down the tubing to the formation. (This step can be performed any time prior to open-hole deployment of the perf guns. Timing of the well kill is at the discretion of the WSL.) a. Wellbore volume to bottom perf = 181 bbls b. 4-1/2” Tubing – 10,791’ X .0152bpf = 164 bbls c. 4-1/2” Liner – 1,105’ X .0152bpf = 17 bbls (to bottom perf) 5. MU and RIH with logging tools in 2-7/8” carrier and 2.875-3.5” JSN nozzle. Tag PBTD. Log up hole and flag pipe for subsequent perf gun run. POOH and confirm good data. a. Once log is obtained, confirm that the milling made it down to PBTD, 11951’MD. If 11951’ MD was not achieved, notify OE and adjust the bottom perf gun depths accordingly. 6. At surface, prepare for deployment of TCP guns. 7. Confirm well is dead. Bleed any pressure off to return tank. Kill well w/KWF, 8.4 ppg brine as needed. Maintain continuous hole fill taking returns to tank until lubricator connection is re-established. 8.Pickup safety joint and TIW valve and space out before MU guns.Review well control steps with crew prior to breaking lubricator connection and commencing makeup of TCP gun string. Once the safety joint and TIW valve have been spaced out, keep the safety joint/TIW valve readily accessible near the working platform for quick deployment if necessary. 9. Break lubricator connection at QTS and begin makeup of TCP guns per schedule below. * Add/Re-Perfs & SIT W-31A PTD:208136 W-31A Perf Schedule *2-7/8” perf guns were used to calculate gun weights. *Note that the perf interval depths may be adjusted slightly depending on the PBTD achieved during milling operations once the tie-in log has been run. Perf Interval Perf Length(ft) Gun Length(ft)Weight of Gun (lbs) 11686-11701 11713-11723 11832-11876 11880-11951 140 265 ~3300lbs (12.41ppf) 10. RIH with perf gun and tie-in to coil flag correlation. Pickup and perforate interval per Perf Schedule above. POOH. a. Note any tubing pressure change in WSR. 11. POOH. Stop at surface to reconfirm well dead and hole full. 12. Review well control steps with crew prior to breaking lubricator connection and commencing breakdown of TCP gun string. 13. FP well and notify the operator not to POP well until SIT is pumped. 14. RDMO CTU. End of Sundry Request Eline *Note that this Eline step can be performed before coil if the Wellwork Schedule permits. MIRU Eline and spot equipment. 1. MU and RIH w/ 2-7/8” perf gun. a. Shoot the following interval in one run: i. Overall gun length 25’ ii. 11142-11156’ (14’) iii. 11159-11167’ (8’) Fullbore 1. Perform SIT. Attachments: 1. Current Wellbore Schematic 2. Proposed Schematic 3. Coil Tubing BOPE Schematic 4. Equipment Layout Diagram 5. Standing Orders for Open Hole Well Control during Perf Gun Deployment 6. Mini Log 7. Tie In Log *See note above regarding kill methods if pressure observed at surface after perforating. Standing orders flow chart included with this sundry request. MU lubricator Add/Re-Perfs & SIT W-31A PTD:208136 Current Wellbore Schematic Add/Re-Perfs & SIT W-31A PTD:208136 Proposed Schematic Add/Re-Perfs & SIT W-31A PTD:208136 Coiled Tubing BOPs Add/Re-Perfs & SIT W-31A PTD:208136 Equipment Layout Diagram Add/Re-Perfs & SIT W-31A PTD:208136 Standing Orders for Open Hole Well Control during Perf Gun Deployment Add/Re-Perfs & SIT W-31A PTD:208136 Mini Log Add/Re-Perfs & SIT W-31A PTD:208136 Tie-In Log Add/Re-Perfs & SIT W-31A PTD:208136 Add/Re-Perfs & SIT W-31A PTD:208136 • • Wallace, Chris D (DOA) From: AK, GWO Well Integrity Engineer <AKGWOWellSiteEnginee@bp.com> Sent: Tuesday, February 13, 2018 10:14 AM To: AK, GWO Well Integrity Engineer; Regg,James B (DOA);AK, OPS EOC Specialists;AK, OPS GC2 Facility OTL;AK, OPS GC2 Field O&M TL;AK, OPS GC2 OSM;AK, OPS GC2 Wellpad Lead;AK, OPS PCC Ops Lead;AK, OPS Prod Controllers;AK, OPS Well Pad HUQ AK, OPS Well Pad LV;AK, OPS Well Pad MN;AK, OPS Well Pad RJ;AK, OPS WELL PAD S;AK, OPS Well Pad SW;AK, OPS WELL PAD W;AK, OPS Well Pad Z;Ak, Ops West Area TL;AK, RES GPB East Wells Opt Engr;AK, RES GPB West Wells Opt Engr; Frankenburg, Amy; Peru, Cale Cc: Wallace, Chris D (DOA);AK, GWO Completions Well Integrity;AK, GWO DHD Well Integrity;AK, GWO Projects Well Integrity;AK, GWO SUPT Well Integrity;AK, OPS FF Well Ops Comp Rep;AKIMS App User; Cismoski, Doug A; Daniel, Ryan; Dempsey, David G; Hibbert, Michael;Janowski, Carrie; Montgomery,Travis J; Munk, Corey;Obrigewitch, Beau;O'connor, Katherine; Romo, Louis A; Sternicki, Oliver R;Tempel,Joshua; Worthington,Aras J Subject: OPERABLE: Producer W-31A(PTD#2081360)Well barriers restored, MIT-Ts passed All, W-31A(PTD#2081360)was made under evaluation on 1/27/18 for having sustained inner annulus casing pressure above NOL. Slickline performed gas lift work from 02/07/18—2/10/2018 and obtained a passing CMIT-TxIA to 2,361psi and MIT-T to 2,330psi. The passing pressure test confirms that well barriers have successfully been restored. At this time the well is reclassified as Operable. Please mind fluid packed annuli when bringing the well online. Please reply with any questions, Joshua Stephens Well Integrity Engineer Office: 907-659-8110 Cell: 907-341-9068 SCANNEV WO ,M..a webs«gwr.a.. From: AK, G' • Well Integrity Engineer Sent: Saturday, Jane;• 7, 2018 5:44 AM To: 'Regg, James B (DOA) (jim. -.= . aska.gov)'; AK, OPS EOC Specialists; AK, OPS GC2 Facility OTL; AK, OPS GC2 Field O&M TL; AK, OPS GC2 OSM; AK, OPS - •ad Lead; AK, OPS PCC Ops Lead; AK, OPS Prod Controllers; AK, OPS Well Pad HUQ; AK, OPS Well Pad LV; AK, OPS Well ► • AK, OPS Well Pad RJ; AK, OPS WELL PAD S; AK, OPS Well Pad SW; AK, OPS WELL PAD W; AK, OPS Well Pad Z; Ak, Ops - ea TL; AK, RES GPB East Wells Opt Engr; AK, RES GPB West Wells Opt Engr; Frankenburg, Amy; Peru, Cale Cc: 'chris.wallace@alaska.gov'; AK, GWO Completions Well Integrity; AK, GWO DHD Welt Integrity; AK, GWO Projects Well Integrity; AK, GWO SUPT Well Integrity; AK, GWO Well Integrity Well Information; AK, OP Well Ops Comp Rep; 1 • ' • STATE OF ALASKA • ALASKA OIL AND GAS CONSERVATION COMMISSION REPORT OF SUNDRY WELL OPERATIONS 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 0 2. Operator Name: BP Exploration(Alaska),Inc 4. Well Class Before Work 5. Permit to Drill Number: 208-136 3. Address: P.O.Box 196612 Anchorage, Development m Exploratory 0 AK 99519-6612 Stratigraphic 0 Service 0 6. API Number 50-029-21900-01-00 7. Property Designation(Lease Number): ADL 0028262 8. Well Name and Number PBU W-31A 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: RECEIVED Total Depth: measured 12039 feet Plugs AUG 312017 pmeasured feet true vertical 8812 feet Junk measured feet Effective Depth: measured 11951 feet Packer measured 10713 feet ^^ true vertical 8867 feet Packer true vertical 8486.44 feet #1�/� CC Casing: Length: Size: MD: TVD: Burst: Collapse: Structural Conductor 80 20"Conductor 31-111 31-111 Surface 2659 13-3/8"68#NT-80 29-2688 29-2688 5020 2260 Intermediate 9764 9-5/8"47#L-80 28-9791 28-7739 6870 4760 Production Liner See Attachment See Attachment See Attachment See Attachment See Attachment See Attachment Perforation Depth: Measured depth: 11109-11141 feet 11167-11199 feet 11206-11276 feet 11686-11701 feet 11713-11723 feet 11832-11850 feet 11866-11876 feet 11886-11896 feet True vertical depth: 8827-8850 feet feet 8868-8889 feet 8894-8940 feet 9010-9004 feet 8999-8995 feet 8939-8928 feet 8918-8912 feet 8906-8900 feet Tubing(size,grade,measured and true vertical depth) 4-1/2"12.6#13Cr80 26-10790 26-8554 Packers and SSSV(type,measured and See Attachment See Attachment See Attachment true vertical depth) 12.Stimulation or cement squeeze summary: Intervals treated(measured): Nov 0 '2 2[111, Treatment descriptions including volumes used and final pressure: 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing Pressure Prior to well operation: 344 535 236 1141 236 Subsequent to operation: 313 529 252 1141 242 14.Attachments:(required per 20 AAC 25.070.25.071,8 25.283) 15.Well Class after work: Daily Report of Well Operations ® Exploratory 0 Development Q Service 0 Stratigraphic 0 Copies of Logs and Surveys Run 0 16.Well Status after work: Oil El Gas 0 WDSPL 0 Printed and Electronic Fracture Stimulation Data ❑ GSTOR ❑ WINJ 0 WAG 0 GINJ 0 SUSP 0 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 Authorized Name: Peru,Cale Contact Name: Peru,Cale Authorized Title: Petroleum En eer Contact Email: Cale.Peru@bp.com i Authorized Signature: Date: $/9)//7 Contact Phone: +1 9075644522 Form 10-404 Revised 04/2017 V7-1.- 10l6//7Ayo��7 R B Di 'S L(/ .9" - 5 2017 Submit Original Only • • Alaska Oil and Gas Conservation Commission 333 West Seventh Avenue Anchorage, AK 99501-3572 RECEIVED AUG 3 1201 RE: BP Exploration (Alaska), Inc. Report of Sundry Well Operations Summary AOGCC August 31, 2017 To Whom it May Concern: Attached please find the Report of Sundry Well Operations for Adding of Perforations for Well W-31A, PTD # 208-136. Sincerely, BP Exploration (Alaska) Inc. P.O. Box 196612 Anchorage, AK 99519-6612 Attachment: Form 10-404 BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage,AK 99519-6612 . • • w Q, 000000 • CDCD ' 000 N f� CCS U tf) _0 N f— I� � U N O0 0 M M M • O CO N CO LO CD I- CO co CO a0 co O co M M CO CO CC) co N CD CO CO In N N. CO CO CO CO Ll) CO CD CA CO LO ct CO CO Cr) N N CSDLO CO N CO CO C co M CN CO 8 CO CA O N O N O r r O CI I . i I . i Q QO CO N co co O C") N N (O 0 . N C r r • CO � 0 co 0 oF, 00Mao0 z Z J CO � d -a t CD 4t N C CO N- # co N co .� N U CO co N N C.) 00 w N MLo N N M V .0 O) C)O LO CO I"- CO CO C CO CO N- N •— CD 0 N N O) Ce W C 0 ] 0 W U a u_ Cen o r Z Z 0 W W W W 0DF- ZZZD 0 f/) Z J J J • Packers and SSV's Attachment PBU W-31A SW Name Type MD TVD Depscription W-31A PACKER 9671.13 7662.2 7" Baker ZXP Top Packer W-31A TBG PACKER 10713.27 8486.44 4-1/2" Baker S-3 Perm Packer W-31A PACKER 10795.2 8558.24 5" Baker ZXP Top Packer M • • in J , Eo U co (n -0 Na) Ln 2 + m - Z 2 N fn N O D o � u_ j W ancn d > 2 _ 2 w O m 3 N Y = N O d) U) O V Q CO 3 a) a) N o a cc' E = 393 a) GO = ti c o a) o_ otS Ti) Q w a3 a)co E m N o = D c � t � _1 o_ O N J O cm N O • Z o U 6 '- o o D ✓ 0 Q �•aa) 0 -0 0 g 5 U c c ,- co m 4, co c = o o ct c o ( m Zo ccoo o°) so. -- —,- N LLIa) 0 N- � r l!7 J V' (Y _ C E Q N a) , _ _� > 0) a 2 Ina '- O � Q 0 = 0 UOa Z J a N O a r U N a) >''- D o a) •- en z fn 0 •� I I-- a ) > - J o 0-) C X c� - Q �- o W 0 W 0 a) a LL 0 a3 a) L+ O >- O ^M m = a0 b2Z a) vi0 0 as co▪ Q � - ix� z O z0 .,. 3 d)0, o Q a m c E O H 2 a = CL O w coo a) C?a 1 2 � a) © :? cn D cQ o (n = CL O a) ; ix - c- -c aa)) o ,-o cu N ~ — � (n � m cz O ao)QQ 30 — rna) 2 N u) o d M O Lu -r a a) •-r-- �, Y � EN 14= m 0 aa 'F it aiag } � O W -0 E = .c L0 rn�C o >- 00 a�` o O w o_ L0 AYH V'ta' F' � (n O moo * 00 _N O 2 « * -"it O a a `t • c O m O O 0 .0 I. `C w N r CO -J - '- BO0 N- 3 �22 j U) > ' me -c .c a— a) a 10Q o a a , oci, ix c « wog'` "- s 3 .= N (ba0 c-al -c G. ,_ � omuj NN 0 ,- _0 c u c � ao _c � � Q °' aa) o IX a mr` mY LO Lo .1-7; NOLLI N o -Z o co • � • 2 ° N1- N < bNo < ZOJ � Z 0- r)0 � � 0 co 3 Oa Q , U a) >+ ON )( NMI - Oa O cr- rT~ L0 E -0Ucn O - a) N z0 ~ ``�- c63 _h �s O o ~ cj 3 `_ co �o c c coo ;_ , co O0 '-t w QcnZ ~ � o � � o � 00 �* � � � Uo o a) _zO �coow Z N � � � ° a) = v -0 c, aU) o z � -1 (73 c‘is a) 5ZaF- fill 9 p .caoOI- I- 0o = � OC9 SI- zIt N a) O OXcn U) N Z c � Q0wO • Bch a) N � c°) coo c � O a c u_ N cp _ c.i ODU � H � � `n = '� II a�io m o cin ._ O o f 0 0 CO 0 � � � Wp m � Ez � W � (~j N 3 � � a co co °= 12 o_( 2 -1c Lu .4- a�iI_ J NOm 73, ° O 4tm � NN � a 520 * " O 30 0 a) ooY ' o * a oQ � O 00 : * 0UDI' I- = � = � o o � ? H a) m m ? a) Loo 0 « a' O0JJa * « CC I: a' : 02 ° 4.-- 3 Or` : 0a. 2 3a 00In ,- CT) W I- 0 I I N- N- N r r r r >- 0 0 0 0 o N I- N N N N N m , 0 1- N N CO N M V La U) U) 1 N- a w "TREE= CNV • WELLHEAD= Mc EV OY SA NOT! :`**4112"CHROME E 786,LNR 8 ACTUATOR= BAKER W-31 A NOT SHOWNN BBL OW ANGLE E>70° @ 11441""`OR1G WaL KB.ELEV= 90.88' BF.ELEV= 54.68' KOP= 3100' I ' ' ik 22201' —I4-1/2"HES X NP,D=3.813" Max Angle= 128°@ 12039' Datum MD= 11186' GAS LIFT MANDRELS Datum TVD= 8800'5S ST MD TVD DEV TYPE VLV LATCH PORT DATE a 8 2474 2474 0 MG DMY RK 0 09/12/08 F3-3/8"CSG,68#,L-80,ID=12.415" --[ 2699' 7 3216 3212 13 MAG DOME RK 16 11/24/08 6 4791 4480 49 MAG DMY RK 0 09/12/08 5 5975 5246 50 TANG DOME RK 16 11/24/08 Minimum ID = 3.725" @ 10779' 4 7434 6183 49 MMC DMY RK 0 09/12/08 4-112" HES XN NIPPLE 3 8597 6973 49 MNG DONE RK 16 11/24/08 2 9549 7584 50 MMC' DMY RK 0 09/12/08 1 10605 8392 30 KBG2-1R SO BK 22 11/24/08 ' ' 9588' —4-1/2"HES XNIP,D=3.813" 9659' —I9-5/8"X 7"ZXP LW w/TIEBACK SLV,D=6.290" 9677' 1--9-5/8"X 7'HMC BKR LNR I-IGR,D=6.320" .44 4 4 9-5/8"WHIPSTOCK(09/20/08) H 9814' �� MLLOUT WINDOW(W-31A) 9792'-9809' LA 10641' —4-1/2"HES X NP,D=3.813" 9-5/8"CSG,47#,L-80,D=8.681" --I 11185' 1-41 PERFORATION SUuMIARY 10714' }—7'X 4-1/2"S-3 PKR ID=3.870" REF LOG:SWS MD GR ON 09/27/08 ` ANGLE AT TOP PEW:41"@ 11109' 44 10748' I—4-1/2"HES X NP,D=3.813'NikNote:Refer to Production 06 for historical pert data SCE SPF INTERVAL Opn/Sgz DATE �� 10779' —4-112"IES XN NIP,D=3.725" 2-7/8" 6 11109- 11141 0 07/30/17 2-718" 4 11167-11199 0 07/30/17 10783' —7'X 5"HR ZXP LTP w/TIEBACK SLV, 2-1/2" 4 11206-11276 0 10/01/08 ID=4.460" 2-1/2" 4 11686- 11701 0 10/01/08 2-1/2" 4 11713-11723 0 10/01/08 10791' —4112"WLEG,D=3.958" 2-112" 4 11832- 11850 0 10/01/08 1, 10805' —7"X 5"BKR FLEXLOCK 2-12" 4 11866-11876 0 10/01/08 LNR HGR D=4.450" 2-1/2" 4 11886-11896 0 10/01/08 . .� 10815' J—5"X 4-1/2"XO, 4-1/2'TBG,12.6#,13-CR VAM TOP, H 10791' ` D=3.930" .0152 bpf,D=3.958" • 7"LNR,26#,L-80 BTC-M,.0383 bpf,D=6.276" — 10934' ` N. • • PBTD H 11951' •% ' 4-112"LNR,12.6#,13-CR VAM TOP, 0152 bpf,0=3.958" 12038' DATE REV BY COMMENTS DATE REV BY COMMENTS PRIDHOE BAY INT 01/14/89 ORIGINAL COMPLETION 06/02/11 RO/PJC FEW DEPTH SPIT-IS WELL: W-31A 10/02/08 7ES SIDETRACK(W-31A) 07/31/17 ATO/JMD ADPE RFS(07/30/17) PERMIT No:12081360 12/03/08 DTR/PJC GLV CIO(11/24/08) API M. 50-029-21900-01-00 05/07/09 CJK/PJC PEW REF LOG UPDATE Sec.21,T11N,R12E,770'FNL&1443'FEL 05/11/09 CJK/TLH FEW REF LOG URATE 04/14/10 GS/JMD DRLG DRAFT CORRECTIONS BP Exploration(Alaska) • RECEIVip BAK R®li JUN 15 2U1i PRINT DISTRIBUTION LIST HUGHESAQPlease sign and return one,,�0C; gcopy of this transmittal form to: COMPANY Exploration Alaska Inc BP Exploration(Alaska)Inc. Petrotechnical Data Center,LR2-1 DATA LOGGED WELL NAME W-31A 900 E. Benson Blvd. K.BENDER� K.BENDER Anchorage,Alaska 99508 FIELD Prudhoe Bay Unit to acknowledge receipt of this data. COUNTY North Slope Borough LOG TYPE RPM:PNC3D BHI DISTRICT Alaska LOG DATE May 26,2017 AUTHORIZED BY Paul Canizares EMAIL Paul.Canizaresbakerhughes.com TODAYS DATE June 7,2017 Revision STATUS Final Replacement: No Details: Rev. Requested by: COMPANY FIELD/ FINAL CD/DVD FINAL PRELIM (las,dlis,PDF,META, SURVEY REPORT ADDRESS(FEDEX WILL NOT DELIVER TO P.O.BO* LOGS LOGS CGM,Final Surveys) (Compass) PERSON ATTENTION #OF PRINTS #Oh I'RIN I S #OF COPIES #OF COPIES #OF COPIES v V V V V V t Baker Hughes,Inc. 0 0 795 E.94th Ave. Anchorage,AK 99515 Attn: Arelys Carolina Martinez Patrick Rider 2 ConocoPhillips Alaska Inc. 1 1 Attn:Ricky Elgarico ATO 3-344 700 G Street Anchorage,AK 99510 3 ExxonMobil,Alaska 0 1 Attn:Lynda M.Yaskell and/or Lisa Boggs 3201 C Street,Suite 505 Anchorage,AK 99503 4 State of Alaska -AOGCC 1 1 Attn:Makana Bender 333 W.7th Ave,Suite 100 Anchorage,Alaska 99501 5 DNR-Division of Oil&Gas *** 1 I 1 Attn:James Hyun 550 West 7th Avenue,Suite 802 S�,pNNE® JUN 2 72017, Anchorage,Alaska 99501 ***Stamp"confidentlar on all material deliver to DNR 6 BP Exploration(Alaska)Inc. 0 0 Petrotechnical Data Center,LR2-1 900 E.Benson Blvd. Anchorage,Alaska 99508 Attn:Gerardo Cedillo TOTALS FOR THIS PAGE: 0 3 4 0 0 TOTALS FOR ALL PAGES: 0 3 4 0 0 Ima a Pro~ct Well History File Cov~age 9 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. ~~ ~ 3 ~ Well History File Identifier Organizing (done) RES AN Color Items: ~eyscale Items: ^ Poor Quality Originals: ^ Other: NOTES: BY: Maria Project Proofing gY: Maria _ Scanning Preparation BY: Maria Production Scanning ~" ~_ x 30 = _~, + ~_ =TOTAL PAGES (Count does not include cover sheet) Date: ~s~ III IIIIIIIIIII VIII Stage 1 Page Count from Scanned File: ,?~ (Count does include cover heet) Page Count Matches Number in Scanning Preparation: YES NO BY: Maria Date: ~ ~~ ~~ ~s~ ~~ C~ Stage 1 If NO in stage 1, page(s) discrepancies were ound: YES NO BY: Maria Date: ~s~ Scannin is com late at this point unless rescanning is required. () I II II II I II II I I III 9 p Rescanned III IIIIIIIIIII VIII BY: Maria Date: ~s/ Comments about this file: Quality Checked III IIIIII III II'I III o,.o.„a iuiuumiiiuii DIGIT L DATA iskettes, No. ` ^ Other, No/Type: Date: Date: ~iiiiumiiiimu mP o R.,G~.Kaed iiiuiiiiiiuiiiii OVERSIZED (Scannable) ^ Maps: ^ Other Items Scannable by a Large Scanner OVERSIZED (Non-Scannable) ^ Logs of various kinds: ^ Other:: 10/6/2005 Well History File Cover Page.doc DATA SUBMITTAL COMPLIANCE REPORT 3/22/2010 Permit to Drill 2081360 Well Name/No. PRUDHOE BAY UNIT W-31A Operator BP EXPLORATION (ALASIC/~y INC MD 12039 TVD 8812 Completion Date 10/2/2008 Completion Status 1-OIL Current Status 1-OIL API No. 50-029-21900-01-00 UIC N REQUIRED INFORMATION Mud log No Samples No Directional Survey DATA INFORMATION Types Electric or Other Logs Run: GR /RES, USIT, GR /RES, AZI-ONES / NEU Well Log Information: Log! Electr Data Digital Dataset Log Log Run Type Med/Frmt Number Name Scale Media No ~D ,D Asc Directional Survey t Directional Survey C Lis 17403~uction/Resistivity 'Log Induction/Resistivity 'Log Induction/Resistivity Well Cores/Samples Information: Interval Name Start Stop (data taken from Logs Portion of Master Well Data Maint Interval OH / Start Stop CH Received Comments 0 12039 Open 10/2/2008 0 12039 Open 10/2/2008 9651 12034 Open 12/31/2008 LIS Veri, ROP, GR, RPS, RPS, RPM, RPD, DRHO, NPHI 9809 11993 Open 12/31/2008 MD Vision Service 9809 11993 Open 12/31/2008 TVD Vision Service Sample Set Number Comments -;~-- . ..,: ~" ADDITIONAL INFORMATION Well Cored? Y Chips Received? --'( hN' ~ Analysis ~ - -- /Y N Received? 25 Blu 25 Blu Sent Received Daily History Received? l9 / N Formation Tops ~ / N Comments: DATA SUBMITTAL COMPLIANCE REPORT 3/22/2010 Permit to Drill 2081360 Well Name/No. PRUDHOE BAY UNIT W-31A Operator BP EXPLORATION {ALASICI~ INC API No. 50-029-21900-01-00 MD 12039 TVD 8812 Completion Date 10/2!2008 Completion Status 1-OIL Current Status 1-OIL UIC N Compliance Reviewed By: _ ~-'"V _ -_____- Date: ~ ~ r t-~-.- ~ l ~p Alaska Data & Consulting Services 2525 Gambell Street, Suite 400 Anchorage, AK 99503-2838 ATTN: Beth Date Delivered: Received by: ~ ; Alaska Data & Consulting Services 2525 Gambell Street, Suite 400 Anchorage, AK 99503-2838 ATTN: Beth NO.5020 Company: State of Alaska Alaska Oil & Gas Cons Comm Attn: Christine Mahnken 333 West 7th Ave, Suite 100 Anchorage, AK 99501 12/29/08 welt Job # Lo Descri lion 4-20/M-35 12014059 STATIC SURVEY/PERF Date BL Color CD W-18 11968978 PRODUCTION PROFILE 12!11/08 1 1 Y-07A 12103704 INJECTION PROFILE ~ 12/20/08 1 1 P2-35 12031533 SCMT 12!18/08 1 1 M-16 _ ~ ~ 12/18/08 1 1 12111931 SCMT P2-15A 40015006 OH MWD/LWD EDIT 12/19/08 1 1 P2-15APB3 40015006 OH MWD/LWD EDIT _ ~`~ 04/01/07 2 1 P2-15APB2 40015006 OH MWD/LWD EDIT a ~ 03/27/07 2 1 P2-15AP61 ~ ~ OD 03/24/07 2 1 40015006 OH MWD/LWD EDIT W-31A 40017846 OH MWD/LWD EDIT ( 03/22/07 2 1 W-29 11549353 CH EDIT (USIT) - ~ _ ~ 09/27/08 2 1 H-05A AXBD-00002 MCNL 12/18/06 1 11/20/08 1 1 ~ l g PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COPY EACH TO: BP Exploration (Alaska) Inc. Petrotechnical Data Center LR2-1 900 E. Benson Blvd. Anchorage, Alaska 99508 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION _• WELL COMPLETION OR RECOMPLETION REPORT AND LOG 1 a. Well Status: ®Oil ^ Gas ^ Plugged ^ Abandoned ^ Suspended zoAAC 2s.,oe zoAAC 2s.,,o ^ GINJ ^ WINJ ^ WDSPL ^ WAG ^ Other No. of Completions One 1 b. Well Class: ®Development ^ Exploratory ^ Service ^ Strati ra hic 2. Operator Name: BP Ex loration (Alaska) Inc. 5. Date Comp., Susp., or Aband 10/2/2008 12. Permit to Drill Number 208-136 3. Address: P.O. Box 196612, Anchora e, Alaska 99519-6612 6. Date Spudded 9/22/2008 ~ 13. API Number 50-029-21900-01-00 4a. Location of Well (Governmental Section): Surface: 7. Date T.D. Reached 9/27/2008 ~ 14. Well Name and Number: PBU W-31A 770' FNL, 1443' FEL, SEC. 21, T11 N, R12E, UM Top of Productive Horizon: 654' FSL, 1099' FEL, SEC. 17, T11 N, R12E, UM g• KB (ft above MSL): 80.48' Ground (ft MSL): 53.08' 15. Field /Pool(s): Prudhoe Bay Field / Prudhoe Bay Total Depth: 1450' FSL, 1096' FEL, SEC. 17, T11 N, R12E, UM 9. Plug Back Depth (MD+TVD) 11951' 8867' Pool 4b. Location of Well (State Base Plane Coordinates, NAD 27): Surface: x- 611789 y- 5959483 Zone- ASP4 10. Total Depth (MD+TVD) 12039' 8812' 16. Property Designation: ADL 028262 TPI: x- 606829 y_ 5960835 Zone- ASP4 5961631 Zone- ASP4 606819 T l D th t 11. SSSV Depth (MD+TVD) None 17. Land Use Permit: : x- y- o a ep 18. Directional Survey ®Yes ^ No •n ~ 19. Water depth, if offshore N/A ft MSL 20. Thickness of Permafrost (l1/D): 1900' (Approx.) 21. Logs Obtained (List alt logs here and submit electronic and printed information per 2 AAC 25.071): GR /RES, USIT, GR /RES, AZI-DNES / NEU 6/irY6%/ ~ y,?s~a ~.~lD , x,39. ~`T/6 22. CASING, LINER AND CEMENTING RECORD CASING SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT Wi. PER FT. GRADE TOP BOTTOM TOP BOTTOM SIZE CEMENTING RECORD PULLED 1 / / I 23. Open to production or inject ion? ®Yes ^ No 24. TUBING RECORD If Yes, list each I & B P MD+TVD f T nterval open r Si d N b rf ti SIZE. DEPTH SEr MD PacI~R SET MD um ): ora on ze an e ottom; e ( o op 4 s f 2-1/2" Gun Diameter 4-1/2", 12.6#, 13Cr80 10791' 10714' , p MD TVD MD TVD 11210' -11280' 8896' - 8942' 008' 9003' ' ' 25. ACID, FRACTURE, CEMENT S4UEEZE, Erc. 11690 - 11705 - 9 11717' - 1172T 8998' - 8993' DEPTH INTERVAL MD AMOUNT ~ KIND OF MATERIAL USED 11836' -11854' 8936' - 8926' ' ' ' ' Freeze Protect w/ 151 Bbls of Diesel 8916 - 8910 11870 - 11880 11890' -11900' 8904' -8898' 26. PRODUCTION TEST Date First Production: October 18, 2008 Method of Operation (Flowing, Gas Lift, etc.): Flowin Date Of Test: 10/20/2008 HOUrS Tested: 6 PRODUCTION FOR TEST PERIOD OIL-BBL: 700 GAS-MCF: 1,043 WATER-BBL: 143 CHOIR: SIZE: 106 GAS-OIL fWTIO: 1,490 Flow Tubing Press. 550 Casing Press: 750 CALCULATED 24-HouR RATE• OIL-BBL: 2,798 GAS-MCF: 4,170 WATER-BBL: 572 OIL GRAVITY-API (CORK): 27 27. CORE DATA Conventional Core(s) A wired? ^Yes ®No Sidewal l Cores Ac wired? ^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 analytical results per 20 AAC 250.071. None ~ f~i1~09 t FOmI 10-40/ KeVISeo U'L/1UU/ I+ONTINUED VN KEVERSE JIDE ~"~ G s 28. GEOLOGIC MARKERS (LIST ALL FORMATIONS AND MARKERS ENCOUNTERED): 29. FORMATION TESTS NAME MD TVD Well Tested? ^ Yes ®No If yes, list intervals and formations tested, briefly summarizing test Permafrost Top resuRs. Attach separate sheets to this form, if needed, and submit Permafrost Base detailed test information per 20 AAC 25.071. Sag River 10929' 8676' None Shublik A 10963' 8706' Shublik B 11029' 8763' Shublik C 11051' 8781' Shublik D 11076' 8802' Eileen 11077 8803' Sadlerochit /Zone 4 11111' 8829' Zone 3 11500' 9033' Zone 3 11616' 9029' Sadlerochit /Zone 4 11996' 8839' Base Eileen /Top Sadlerochit 11996' 8839' Formation at Total Depth (Name): Eileen (Base Marker Depth) 11996' 8839' 30. List of Attachments: Summary of Daily Drilling Reports, Well Schematic Diagram, Surveys 31. I hereby certify that the forego'ng is true and correct to the best of my knowledge. ~~~/~ D ' ate Si ned Title Drillin Technolo ist 9 Terrie Hubble 9 9 PBU W-31A 208-136 ~epared ey Namenvumber. Tenie Hubble, 564828 Well Number p Drilling Engineer: Gar'-et Staudinger, 564-4242 INSTrzUCnoNs GENERAL: This form is designed for submitting a complete and COrect 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. ITEUII 1a: Classification of Service Wells: Gas Injection, Water Injection, Water-ARemating-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 forth 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 TVD for the top and base of permafrost in Box 28. ITEM 22: Attached supplemental records for this well should showthe details of any muRiple stage cementing and the location of the cementing tool. ITEM 23: If this well is completed for separate production from more than one interval (mukiple completion), so state in item 1, and in item 23 showthe producing intervals for only the interval reported in item 26. (Submit a separate forth for each additional interval to be separately produced, showing the data pertinent to such interval). ITEM 26: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-In, or Other (explain). ITEM 27: 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 29: Provide a listing of intervals tested and the coresporxling 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 02/2007 Submit Original Only BP Exploration Page 1 of 1 Leak-Off Test Summary Legal Name: W-31 Common Name: W-31 ___- _ __ Test Date Test Type Test Depth (TMD~ Test Depth (TVD) AMW Surface Pressure ~ Leak Off Pressure (BHP) EMW 9/21/2008 FIT -- 9,782.0 (ft) - - 7,739.0 (ft) -- 11.20 (ppg) 322 (psi) 4,825 (psi) 12.00 (ppg) 9/25/2008 FIT (ft) (ft) (ppg) (psi) (psi) 12.00 (ppg) 9/26/2008 FIT 10,935.0 (ft) 8,681.0 (ft) 8.50 (ppg) 1,128 (psi) 4,961 (psi) 11.00 (ppg) 9/25/2008 FIT 10,934.0 (ft) 8,681.0 (ft) 8.50 (ppg) 1,128 (psi) 4,961 (psi) 11.00 (ppg) Printed: 10/6/2008 2:10:23 PM BP Exploration Page 1 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Event Name: REENTER+COMPLETE Contractor Name: NABOBS ALASKA DRILLING Rig Name: NABOBS 7ES Date From - To Hours Task Code i NPT 9/14/2008 06:00 - 17:00 11.00 MOB P 17:00 - 00:00 7.00 MOB P 9/15/2008 00:00 - 06:00 6.00 MOB ~ P 06:00 - 00:00 I 18.00 I MOB I P 9/16/2008 ~ 00:00 - 14:00 ~ 14.00 ~ MOB ~ P 14:00 - 17:00 3.00 MOB P 17:00 - 21:00 4.00 MOB P 21:00 - 22:30 1.50 RIGU P 22:30 - 23:00 0.50 RIGU P 23:00 - 00:00 1.00 RIGU P 19/17/2008 100:00 - 00:30 0.501 WHSUR ~ P 00:30 - 03:30 3.001 WHSUR ~ P 03:30 - 05:00 I 1.501 WHSUR I P 05:00 - 08:00 3.00 BOPSU~ P 08:00 - 13:00 5.00 BOPSU P 13:00 - 15:00 I 2.001 DHB I P Spud Date: 12/24/1988 Start: 9/1 /2008 End: I Rig Release: 10/2/2008 Rig Number: Phase Description of Operations PRE Move camp, pits and shop from 05-35 to W-31 PRE Spot camp on W-Pad. Continue move of substructure from DS 5 to W-Pad. PRE Continue substructure move from 05-35 to W-31. Travel between K-Pad access road at west dock to Spine road / K-Pad road intersection. PRE Substructure move continued from Spine / K-Pad intersection to W-Pad access road. PRE Continue moving rig down W-Pad access road. Matting required for the length of the road. PRE Arrive on W-Pad. Spot substructure over W-31. Raise derrick, rig down bridle lines, Rig up topdrive. PRE Spot pits and connect lines from substructure to pit module. Berm cellar area. Prepare rig floor and pit module for well. PRE Accept rig at 2100 hrs. Bring on 290 bbls 9.3 ppg NaCL brine. Rig up circulation lines and tie in to Wells Support tiger tank. PRE Pre-Spud Safety meeting with Johnston Crew. PRE Rig up Valve Crew BPV lubricator and pressure test to 500 psi. Pull BPV. "* Hold Pre-Tower /Pre-Spud safety meeting with Turner Crew**"` PRE Rig down BPV lubricator. Line up to displace diesel freeze protect to tiger tank. PRE Displaced 41 bbls of diesel freeze protect with 9.3 ppg brine. Well U-tubing up tubing side. Reverse circulate additional brine down IA w/ returns to rig and well became static. PRE Dry rod in and pressure test TWC. Nipple down tree and tubing head adaptor. Cameron Wellhead technicians inspect tubing hanger crossover threads -Lock down screws all funtioned without trouble. Tubing crossover made up 8.5 turns. PRE Nipple up BOPE. PRE PJSM with Rig Crew on testing BOPs Test BOPS to 250 Low and 3500 psi High -Witness of Test waived by AOGCC rep Jeff Jones, test witnessed by BP WSL Duncan Ferguson, NAD Toolpusher Chris Weaver Test to 250 psi low and 3500 psi high, each test held for 5 minutes and charted #1 Test -Top Pipe 4" Rams, Choke Valves 1,2,3,16, Dart, HCR Kill valve, Lower IBOP #2 Test -Choke Valves 4,5,6, Manual Kill valve, Manual IBOP #3 Test -Choke Valves 7,8 & 9, TIW #4 Test -Test Super Choke and Manual Choke to 250 psi low, 3500 high #5 Test -Choke Valves 10, 11 and 15 #6 Test -Choke Valve #14 #7 Test -HCR Choke #8 Test -Manual Choke Annular #9 Test -Blind Rams #10 Test -Top Pipe 4.5" # 11 Test -Annular 4.5" No Failures, Good Test ,PRE Rig up DSM lubricator with extention and pressure test to 500 rnntea: i wm~wa c: w:co rm BP Exploration Page 2 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: Date ~ From - To I Hours Task Code NPT Phase I Description of Operations 9/17/2008 13:00 - 15:00 2.00 DHB P PRE psi. Pull TWC and rig down lubricator. 15:00 - 15:30 0.50 PULL P DECOMP Rig up landing joint and crossover from Topdrive to tubing hanger BTC threads. Engage tubing hanger, back out lockdown screws. Tubing hanger unseated at 125,000 lbs. Pull hanger to rig floor. 15:30 - 17:00 1.50 PULL P DECOMP Circulate hole bottoms up: 611 bbls, 350 gpm @ 445 psi. 17:00 - 19:45 2.75 PULL P DECOMP Pull and lay down 4.5" tubing while Camco spooled balance and control lines. Pull and lay down 2099' of tubing to the SSSV. Camco spooled 2075' of 1/4" stainless steel lines and recovered 26 clamps and 4 SS bands. No inventory for bands or clamps, indications that all were recovered. 19:45 - 20:15 0.50 PULL P DECOMP Rig down Camco spooling unit. 20:15 - 00:00 3.75 PULL P DECOMP Resume pulling and laying down 4.5" tubing to 2590' 9/18/2008 00:00 - 02:30 2.50 PULL P DECOMP Continue to pull and lay down 4.5" completion. Pulled and laid down: - 270 jts 4.5" 12.6# AB Butt plus a 5' jet cut pup - 5 Teledyne-Merla GLMs - 1 Camco ball valve - 1 McEvoy tubing hanger - Tree and adaptor All components NORM inspected and passed 02:30 - 03:00 0.50 PULL P DECOMP Rig down 4.5" pulling equipment 03:00 - 04:30 1.50 BOPSU P DECOMP Rig up and pressure test lower BOP rams with 4" test joint to 3500 psi. Rig down test joint. 04:30 - 06:00 1.50 CLEAN P DECOMP Install wear ring. Make up 9 5/8" scraper BHA#1: 8.5" bit, 9 5/8 casing scraper, 3 stands drill collars, 8 1/2" string mill, 6 stands HWDP. BHA#1 Total Length - 833' 06:00 - 14:00 8.00 CLEAN P DECOMP RIH with 9 5/8" scraper BHA picking up drill pipe in singles. Tag tubing stump at 10,836'. Pick up weight: 190,000; set down weight: 145,000 14:00 - 16:00 2.00 CLEAN N WAIT DECOMP Circulate 490 bbls of 9.3 ppg brine, 3 bpm ~ 208 psi while waiting on trucks to arrive with displacement fluids. 16:00 - 17:00 1.00 CLEAN N WAIT DECOMP Continue circulation operations while waiting on truck, caught behind a wide impassable on the Spine road, to arrive with dispalcement fluid. 17:00 - 19:00 2.00 CLEAN P DECOMP Take on 870 bbls LSND milling fluid to pits 1, 2, 3 and pill pit. Displace well with 125 bbls fresh water, 50 bbls Duo-vis high viscosity spacer and 725 bbls of 11.2 ppg LSND. Initial casing pressure - 2400 psi ~ 500 gpm Final casing pressure - 2910 psi (~ 500 gpm Well was static after completion of displacement. 19:00 - 22:30 3.50 CLEAN P DECOMP Pull out of hole to 8954' and pump a dry job. Blow down topdrive and continute out of hole to 833'. Mud Weight In: 11.2 ppg Mug Weight Out: 11.2 ppg 22:30 - 23:30 1.00 CLEAN P DECOMP Pull out and lay down BHA#1. Prepare rig floor for E-Line USIT log. 23:30 - 00:00 0.50 EVAL P DECOMP PJSM with Schlumberger E-Line crew. Begin rigging up E-Line equipment. 9/19/2008 00:00 - 02:00 2.00 EVAL P DECOMP Rlg up E-Line sheaves, Re-spot E-Line unit, make up GR / CCL /USIT logging tool. rrirnea: iuroreuuo r.iuznrm BP Exploration Operations Summary Report Page 3 of 14 Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: ..,Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: Date From - To Hours ' Task Code NPT Phase Description of Operations 9/19/2008 02:00 - 09:00 7.00 EVAL P DECOMP Log GR /CCL /USIT form 10, 845' to 100'. Lay down logging tools. 09:00 - 11:30 2.50 DHB P DECOMP Prepare 9 5/8" HES EZSV running tool and swap E-line heads. 11:30 - 15:45 4.25 DHB P DECOMP Rlg up Schlumberger E-Line and make up 9 5/8" HES EZSV casing bridge plug. RIH with GR /CCL and casing bridge plug setting tool, 9 5/8" EZSV. - Log up and correlate log with previous USIT log - Place EZSV Bridge plug 4 feet above collar at 9825' - Set Bridge plug with bottom at 9827' and top of plug ~ 9824' - POH and rig down wireline unit 15:45 - 16:30 0.75 DHB P DECOMP Close blind rams and pressure test 9 5/8" casing and EZSV to 3500 psi for 10 mins. Passing test. 16:30 - 18:00 1.50 WHSUR P DECOMP Pull 9 5/8" wear bushing and make up pack-off retreval tool. Sting in with retreval tool and begin to back out lockdown screws. Prior to backing out the last lockdown screw the casing hanger and pack-off pushed up out of the casing spool. Measuring the drill pipe at surface indicated that the hanger came up roughly 10 inches. Laid down pack-off and retrieval tool. 18:00 - 20:30 2.50 WHSUR P DECOMP Contact town engineers and discuss plan forward. Made decision to attempt to pull the casing up enough to set slips and install new casing hanger mandril and pack-offs. Contact Baker to deliver 9 5/8" casing spear. 20:30 - 22:00 1.50 WHSUR P DECOMP Rig up Baker 9 5/8" casing spear and stab into casing. Confirm spear set and pull pipe to 290k. Casing stretched approxmatly 26". Continued to work casing up to 300k. 22:00 - 22:45 0.75 WHSUR P DECOMP Split the BOP stack / wellhead at the tubing spool /casing spool flange to evaluate the location of the casing hanger and collars. At neutral weight, the casing hanger is -7 inches above the landing ring in the casing spool. 22:45 - 23:30 0.75 WHSUR P DECOMP Worked casing up to 350k, but not able to position casing collar above the casing spool flange enough to set slips. There is a -2' pup below the hanger. Compressing the casing with -20k moves the hanger -2.5" closer to the landing mandril. 23:30 - 00:00 0.50 WHSUR P DECOMP Contact Anchorage engineers to develop plan forward. 9/20/2008 00:00 - 00:15 0.25 WHSUR P DECOMP Discuss plan forward with Anchorage engineers: Run in hole with drill collars, HWDP, 4" drill pipe and 9 5/8" HES Storm packer to recompress casing and seat the hanger back on landing ring. 00:15 - 02:30 2.25 WHSUR P DECOMP Nippled BOP stack back to casing spool. Land old pack-offs on the casing hanger to minimize contamination of OA brine with LSND displaced while running in with weight pipe and storm packer assembly. Installed 9 5/8" wear bushing. Verbal approval received from Paul Forman and Garry Christman to nipple down and pick up the BOP during this operation. OA was closely monitored for 24 hours prior to nippling down BOP. 02:30 - 04:00 1.50 CASE P DECOMP Run in hole with BHA #2: 9 5/8" Storm packer assembly - 8 1/2" MXL-1 bit, 9 jts 6 3/8" drill collars, 18 jts 4" HWDP, 20 stands 4" drill pipe, 9 5/8" HES RTTS packer with Storm valve. 04:00 - 05:00 1.00 CASE P DECOMP Hold PJSM with HES and rig personnel covering storm packer setting operations. Set packer at 35'. Pull out of the hole and rnmeu. iuioicwo c.~o.co rm ~~ BP Exploration Page 4 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABORS 7ES Rig Number: Date ,From - To Hours Task Code NPT Phase ' Description of Operations __ -- 9/20/2008 - 04:00 - 05:00 1.00 CASE P DECOMP lay down packer running tool. Rig up pack-off pulling tool and pull inner casing pack-offs through the BOP stack. 05:00 - 08:00 3.00 WHSUR P DECOMP Split the BOP / wellhead at the casing head /casing spool flange. Casing hanger is landed on the landing ring in the casing head. Installed new inner casing pack-offs. 08:00 - 10:00 2.00 WHSUR P DECOMP Nipple up BOPs. Cameron wellhead technician plastic packed inner casing void with 2 J-sticks of plactic packing. Perfomed 30 min positive pressure pack-off test on the inner casing void to 5000 psi. Passing test. 10:00 - 11:00 1.00 FISH P DECOMP Install 9 5/8" wear bushing. Pull and lay down 9 5/8" RTTS packer and Storm valve. 11:00 - 12:00 1.00 FISH P DECOMP Trip out of the hole with 20 stds drill pipe, 6 stds HWDP, 3 stds drill collars. 12:00 - 12:30 0.50 FISH P DECOMP Stand back BHA and lay down bit. 12:30 - 13:30 1.00 CASE P DECOMP Perform 30 min casing pressure test to 3500 psi. Passing test. 13:30 - 16:00 2.50 STWHIP P WEXIT Make up BHA #3 whipstock: - Whipstock Anchor, Baker Gen 2 9 5/8" Whipstock, 8.5" Window mill, 8.5" string mill, flex joint, 8.5" string mill, 1 jt HWDP, MWD, 9 jts drill collars, 18 jts HWDP, 4" drill pipe. 16:00 - 17:30 1.50 STWHIP P WEXIT RIH with BHA #3 and one stand of 4" drill pipe to 1032'. Surface test MWD tools. 17:30 - 23:00 5.50 STWHIP P WEXIT Continue running in hole with whipstock assembly on 4" drill pipe to 9726'. 23:00 - 00:00 1.00 STWHIP P WEXIT Bring up pumps to 410 gpm at 2382 psi to orient whipstock to 25 deg. right of high side. - Set down weight: 132,000 Ibs - Pick up weight: 180,000 Ibs. Tag EZSV at 9814' and set down 17,000 Ibs to shear lower anchor slips. Pull over pick up weight 20,000 Ibs to confirm anchor set. Set ` '" ~~1 ~ down 30,000 bls to shear mill assembly off whipstock ramp. 9/21/2008 00:00 - 06:30 6.50 STMILL P WEXIT Mill 8 5" window in 9 5/8" casina. Toy of window 9792' and. bottom of window at 9809' - 413 gpm at 2374 psi on bottom (2280 psi off bottom) - 105 rpm at 11.1 k fUlbs torque on bottom (5.8k fUlbs off bottom) - Pick Up Weight: 180,000 Ibs - Set Down Weight: 132,000 Ibs - Weight On Bit: 7,000 Ibs - Rotate Weight: 150,000 Ibs Cement in cuttings. 06:30 - 08:00 1.50 STKOH P WEXIT Circulate one and a half bottoms up plus 50 bbls Super Sweep at 425 gpm / 2400 psi. There was a minimal increase in cuttings returns. 08:00 - 09:00 1.00 STKOH P WEXIT Pull BHA into cased hole to 9782' and performed FIT test to 12.0 p - 9782' and / 7739' tvd - 11.2 ppg Mud Weight In /Out - Pressure up to 340 psi with a total of 0.8 bbl. Chart recorded test and held test for 10 min with zero pressure bleed off. Bled back pressure and returned 0.8 bbl. -Monitor Well, Static Pfi ntBtl: lU/li/1UUtl G:1 U:Ltl PM ~ ~ BP Exploration Page 5 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: Date From - To Hours ' Task Code NPT Phase Description of Operations 9/21/2008 09:00 - 13:00 4.00 STKOH P WEXIT Trip out of hole from 9782' to BHA at 540' Mud Weight In /Out: 11.2 ppg / 11.2 ppg 13:00 - 14:30 1.50 STKOH P WEXIT Stand back HWDP, lay down drill collars and 8.5" milling BHA. Pilot MIII: 1/16 Under gauge, Middle and Upper Mills: In gauge 14:30 - 15:00 0.50 STKOH P WEXIT Pick up jetting tool and wash BOPs post milling operations. 15:00 - 17:30 2.50 STKOH P WEXIT Make u 8.5" Intermediate Interval Drilling assembly: - 8.5" Re-Run Hycalog PDC bit, 1.83 LB motor, ARC6, MWD, 3 jts NM Flex drill collars, hydraulic jars, 20 jts 4" HWDP. Total length: 810.33'. Shallow test MWD - Pumps: 442 gpm / 1091 psi - Pick Up Weight /Set Down Weight: 55,000 Ibs / 55,000 Ibs 17:30 - 19:00 1.50 STKOH P WEXIT Trip in hole with singles of 4" drill pipe. 19:00 - 22:30 3.50 STKOH P WEXIT Trip in hole with stands of 4" drill pipe from 2816' to 9690' 22:30 - 23:00 0.50 STKOH P WEXIT Performed MWD tie in survey from 9690' to 9765'. Slack through the window with out rotation or pumps to 9825' 23:00 - 00:00 1.00 DRILL P INTi Slide from 9825' to 9834': - Pumps: 454 gpm / 3134 psi (3013 psi off bottom) - Pick Up Weight: 175,000 Ibs - Set Down Weight: 125,000 Ibs - Weight On Bit: 7,000 Ibs -Actual Drilling Time :0.17 hrs -Actual Rotating Time : 0.0 hrs - Actual Sliding Tlme: 0.17 hrs - Time on Jars: 132.17 hrs 9/22/2008 00:00 - 12:00 12.00 DRILL P INT1 Directionally drill ahead from 9835' to 10,000' - Pick Up Weight: 185,000 Ibs, Slack Off Weight: 125,000 Ibs, Rotating Weight: 150,000 Ibs, Weight on Bit: 10,000 Ibs - Pumps: 500 gpm at 3879 psi (3680 psi off bottom) - TO: 12.6k fUlbs (9.2k Wlbs off bottom), 60 RPMs - Mud Weight In /Out: 11.2 ppg / 11.2 ppg - Actual SlideTime: 4.65 hrs, Actual Rotating Tlme: 0.58 hrs, Actual Drilling Time 5.23 hrs 12:00 - 00:00 12.00 DRILL P INTi Directionally drill ahead from 10,000' to 10,232' - Pick Up Weight: 185,000 Ibs, Slack Off Weight: 125,000 Ibs, Rotating Weight :145,000 Ibs, Weight on Bit: 15,000 Ibs - Pumps: 495 gpm at 3958 psi (3702 psi off bottom), 60 RPMs -Torque: 8k ft/Ibs (6k ft/bls off bottom), - Mud Weight In /Out: 11.2 ppg / 11.2 ppg - Actual SlideTime: 5.93 hrs, Actual Rotating Tlme: 0.55 hrs, Actual Drilling Time 6.48 hrs - Bit Hours: 11.88: Jars: 143.89 - No losses to formation during drilling operations, 9/23/2008 00:00 - 04:00 4.00 DRILL P INT1 Directionally drill ahead from 10232' to 10,381'. - Pick Up Weight: 182,000 Ibs, Slack Off Weight: 120,000 Ibs, Rotating Weight: 132,000 Ibs, Weight on Bit: 14,000 Ibs - Pumps: 480 gpm at 3930 psi (3350 psi off bottom) - Torque: 9.5k ft/Ibs (7.5k ft/Ibs off bottom), 60 RPMs - Mud Weight In /Out: 11.2 ppg / 11.2 ppg 04:00 - 04:30 0.50 DRILL N RREP INT1 Pull out of hole from 10381' to 9784' while trouble shooting generator #2 engine 04:30 - 06:00 1.50 DRILL P INT1 Cut and slip drilling line. -Cut 100' drilling line -Service top drive and drawworks rnmeu: iuioicvvo c.iuco rm ~ f BP Exploration Page 6 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: Date From - To Hours Task Code I NPT Phase Description of Operations 9/23/2008 06:00 - 08:30 2.50 DRILL N RREP INT1 08:30 - 12:00 3.50 DRILL P INTi 12:00 - 23:00 11.001 DRILL P INT1 23:00 - 00:00 1.001 DRILL P INTi 19/24/2008 100:00 - 01:00 1.00 DRILL P INT1 01:00 - 02:30 1.501 DRILL P INT1 02:30 - 03:15 0.751 DRILL P INT1 03:15 - 04:00 0.751 DRILL P INT1 04:00 - 06:00 2.001 DRILL P INT1 06:00 - 07:00 1.001 DRILL P INT1 07:00 - 10:30 3.501 DRILL P INT1 Replaced turbo O-rings in line to After-Cooler RIH to 10,381' md. -Continue to directionally drill from 10,381' to 10,500' and -PUW=195k ,SOW=130k ,ROW=150k , WOB=15k -Pumps: 500 gpm, 3917'psi on bottom, 3860 psi off bottom -Torque:9000 fUlbs on bottom, 7000 fUlbs off bottom at 60 rpm -ADT= 4.56 hrs, AST= 3.28 hrs, ART= 1.28 hrs -11.59 Calc ECD; 11.80 Act ECD -PJSM with incoming crew Continue to directionally drill from 10,500' to 10,928' and per Geologist. -PUW=198k ,SOW=143k ,ROW=160k , WOB=15k -Pumps: 500 gpm, 4066 psi on bottom, 3960 psi off bottom -Torque:8000 ft/Ibs on bottom, 7000 fUlbs off bottom at 60 rpm -ADT= 6.34 hrs, AST= 3.77 hrs, ART= 2.57 hrs -11.687 Calc ECD; 11.90 Act ECD -MW in and out 11.2 ppg at 1400 and 2100 hrs Circulate bottoms up while slowly reciprocating string one stand. -Pumps at 500 gpm, 4040 psi -Torque at 7000 fUlbs at 80 rpm -PUW=198k, SOW= 143k, ROW= 160k -PJSM with incoming crew Directionally drill from 10,928' to 10,935' and per Geologist. -Samples at 10,928' and did not show targeted sands -PUW=198k ,SOW=143k ,ROW=160k , WOB=15k -Pumps: 500 gpm, 4086 psi on bottom, 3960 psi off bottom -Torque:9000 ft/Ibs on bottom, 7000 ft/Ibs off bottom at 60 rpm Circulate bottoms up while slowly reciprocating string one stand. -Samples contained targeted sands of Top of Sag River -Geolooist called casino point at 10.935' and (8.681' tvd) Short trip to window from 10,935' to 9,784' md. -No noticeable drag or hole problems -PUW on trip out 195k. -Monitor well at window -Static ',RIH from 9,784' to TD at 10,935' md. -SOW on trip in 140k -No problems Pump 45 bbl high vis sweep while rotating and reciprocating string. -Pumps: 480 gpm, 3820 psi -Rotation at 60 rpm -PUW=198k, SOW=140k, ROW=160k -Monitor shakers POH from 10,935' to 9,792' md. -PUW=198k, SOW=140k -No problems -Monitor well -Static -POH from 9,792' to 812' and -Pump dry job -Blow down top drive -Drop 2 1/4" rabbit Printed: lU/(i/"LW8 L:1 u:2ti NM r~ BP Exploration Page ~ of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABORS 7ES Rig Number: Date From - To Hours ', Task Code ' NPT ' Phase' ~ Description of Operations - ~ - - - 9/24/2008 07:00 - 10:30 3.50 DRILL P INT1 -PUW=180k, SOW=125k 10:30 - 13:30 3.00 DRILL P INT1 LD drilling BHA -20 jts of HWDP, jars, DC's, stabilizers, bit -PJSM with incoming crew 13:30 - 15:30 2.00 CASE P LNRi Chan a out to rams in BOPE to 7". -Pull wear bushing -Test at low of 250 psi and high to 3500 psi -Install wear bushing 15:30 - 16:00 0.50 CASE P LNR1 Clean and clear rig floor. -Mobilize casing tongs to rig floor -Make dummy run with liner hanger 16:00 - 19:00 3.00 CASE P LNRi MU float shoe assembly and test floats -Baker-Lok first three joints -RIH with 7" liner filling every 10 joints -Centralizers on jts 1 and 2; every other jt on 4-26; each jt on 31 and 32 19:00 - 20:00 1.00 CASE P LNR1 MU HMC Liner Hanger and ZXP Liner Top Packer -Circulate 1 1/2 times liner volume -Pumps: 213 gpm, 158 psi -PUW=57k, SOW=55k -RD casing tongs 20:00 - 00:00 4.00 CASE P LNR1 RIH on 4" DP from 1,249' to 7,207' md, 1 stand per minute -Fill DP every 15 stands -PUW=126k, SOW=110k 9/25/2008 00:00 - 02:30 2.50 CASE P LNR1 Continue to RIH on 4" DP to 9,743' md. -Establish circulation slowly while monitoring for losses -Circulate 130 bbls at window -Stop circulation, monitor well -Static 02:30 - 03:30 1.00 CASE P LNRi RIH with 7" liner on 4" DP. -RIH with liner shoe to 10,895' and -Establish circulation slowly; circulate and condition mud -PUW=200k /SOW=100k 03:30 - 05:30 2.00 CEMT P LNR1 MU cement head, RIH to TD. -PU 1', verify TD at 10,935 -Reciprocate string 5-6' several times; there were indications o ackoff . -PU off bottom to 10,934' and -Circulate and condition well for cement -PJSM with SLB, crew, WSL, Tourpusher 05:30 - 06:30 1.00 CEMT P LNR1 Cement liner per cement plan -Pressure test cement lines to 4,500 psi -Pump 30 bbls of MudPUSH II ~ 12 ppg -Pump 54 bbls of Class G tail C~3 15.8 ppg at 4-5 bpm -Kick plug out with 10 bbls water, positive indication plug left cement head -Switch over to rig pumps; displace cement with 121 bbls 10.2 ppg LSND mud -82 bbls to latch liner wiper plug at 3 bpm, 500 psi spike -126 bbls to bump the plug at 2 bpm, bumped plug with 4100 psi 06:30 - 09:00 2 50 CEMT P LNR1 Pressure to 4200 to set hanger packer with 140k string weight . -Set down 60k -Bleed pressure to zero and check floats rnmea: iuioizuvo z: w:~a rm ~ ~ BP Exploration Page 8 of 14 .Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: .Date From - To Hours ~ Task , Code ~ NPT Phase Description of Operations 9/25/2008 06:30 - 09:00 2.50 CEMT P LNR1 -Monitor well at floor for flow -Static -Pick up to expose dogs on ZXP liner packer, set down 50k; surface indication of packer set -Slack off, rotate 20 rpm to confirm set -Pumps 457 gpm, 2488 psi to clear cement in well above packer -Returns show 7 bbls cement to surface -Pump dry job, blow down lines -Break down cement head 09:00 - 12:00 3.00 CEMT P LNR1 POH from liner top at 9,659' to 810 'and -PJSM with incoming crew 12:00 - 13:00 1.00 CEMT P LNR1 LD liner hanger running tool BHA -Inspect and confirm dog sub pins sheared 13:00 - 15:00 2.00 BOPSU P PROD1 Change rams in BOP from 7" to 3 1/2"x6" variable -Pull wear bushing and set test plug -Change out upper rams -Pressure test rams at 250 psi low and 3500 psi hiah -Tested with 4" test joint and each test held 5 min on chart -Remove test plug and install wear bushing 15:00 - 17:00 2.00 DRILL P PROD1 Pick up 6 1/8" BHA -PJSM on picking up BHA, handling nuclear source -Pick up 6 1/8" tri-cone bit, 1.83 deg motor, stabilizer, MWD tool, ADN tool, 3 NM flex drill collars, pump out sub, jars 17:00 - 22:00 5.00 DRILL P PROD1 RIH from 215' to 10,785' and -Shallow hole test MWD 22:00 - 23:00 1.00 EVAL P PROD1 Pressure test casing and liner -Rig up pressure test equipment -Pressure test casing and liner to 3500 psi for 30 min on chart - test good = -Rig down test equipment 23:00 - 00:00 1.00 DRILL P PROD1 Drill through cement on top of landing collar from 10,745' to 10,815' and -Approx. 2 bbls (-60') of cement wash on top of landing collar from cement job -Torque=8k at 30 rpm -Pumps: 235 gpm, 2270 psi -ROW=155k 9/26/2008 00:00 - 03:00 3.00 DRILL P PROD1 Drill float equipment and cement -Drill landing collar, float shoe from 10,851' to 10,924' and -PUW=190k, SOW=125k, ROT Wt=150k -Pumps: 250 gpm, 2471 psi -30 rpm, WOB=5k -Torque=9k fUlbs 03:00 - 06:00 3.00 DRILL P PROD1 Displace mud system from 11.2 ppg LSND to 8.5 ppg FloPro and clean surface equipment -Pumps: 250 gpm, 2471 psi 06:00 - 07:00 1.00 DRILL P PROD1 Drill from 10,924' to 10,955' and -Drill out shoe and 20' into formation from 10,935' to 10,955'. and -PUW=180k, SOW=145k, ROT Wt=164k -40 rpm, WOB=5k -Pumps: 250 gpm, 1480 psi on, 1447 psi off Printed: 10/6/2008 Z:1U:28 rnn • • BP Exploration Page 9 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABORS 7ES Rig Number: Date !From - To Hours 'I Task Code NPT Phase Description of Operations 9/26/2008 06:00 - 07:00 1.00 DRILL P PROD1 -Torque=4.5k ft/Ibs 07:00 - 08:00 1.00 EVAL P PROD1 FIT -RU lines for FIT -EMW=11.0 PP9~ MW=8.4 PP9 -Shoe TVD=8681', test pressure=1175 psi -Hold pressure for 10 min on chart -Good test -RD lines 08:00 - 12:00 4.00 DRILL P PROD1 Directionally drill from 10,955' to 11,045' and -PUW=183k, SOW=147k, ROT Wt=162k -40 rpm, WOB=15k -Pumps: 252 gpm, 1630 psi on, 1480 psi off -Torque on=6.5k, Torque off=5k -AST=1.29 hrs, ART=2.16 hrs, ADT=3.45 hrs, Jars=3.45 12:00 - 00:00 12.00 DRILL P PROD1 Directionally drill from 11,045' to 11,489' and -PUW=188k, SOW=148k, ROT Wt=165k -40 rpm, WOB=15k -Pumps: 252 gpm, 1745 psi on, 1500 psi off -Torque on=6.5k, Torque off=5k -AST=5.10 hrs, ART=2.60 hrs, ADT=7.70 hrs -Total Jars hrs=11.18, Total Bit hrs=11.18 -SPR Pump 1: 2 bpm=580 psi, 3 bpm=740 psi -SPR Pump 2: 2 bpm=500 psi, 3 bpm=680 psi 9/27/2008 00:00 - 14:30 14.50 DRILL P PROD1 Directionall drill from 11,489' to 12,039' TD (8,841' TVD . - -PUW=185k, SOW=135k, ROT Wt=155k -40 rpm, W06=18-20k -Pumps: 245 gpm, 1470 psi on, 1340 psi off -Torque on=8k, Torque off=6k -AST=3.95 hrs, ART=5.55 hrs, ADT=9.50 hrs -Total Jars hrs=20.70, Total Bit hrs=20.70 -PJSM with incoming crew 14:30 - 15:00 0.50 DRILL P PROD1 Circulate 1.5 times open hole volume -Pumps: 233 gpm, 1340 psi -Reciprocate and rotate at 40 rpm -MW in and out 8.5ppg -Monitored shakers -Monitor well -Static 15:00 - 20:00 5.00 EVAL P PROD1 POH from TD to 11,150' md. -Orient ADN to low side of hole -POH for MAD pass per Geologist direction -POH at 350'/hr, 228 gpm, 1248 psi -Pumped out with no backream; no problems -Pulled into shoe at 10,934' and with bit -PUW=182k, SOW=145k, ROT Wt=162k -40 rpm, W06=18-20k -MW in and out 8.5 ppg 20:00 - 22:00 2.00 DRILL P PROD1 Circulate 1.5 times bottoms up to clean wellbore. -Drop 1 7/8" ball and rod to open pumpout sub -Circulate and reciprocate 20' at 500 gpm, 1457 psi -Clear indication of pressure spike (2260 psi) to open sub -Monitor shakers during circulation -some sands but otherwise clean -Monitor well -Static rnntea: iwoizuus znu:za rm BP Exploration Page 10 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 i~Rig Name: NABOBS 7ES Rig Number: i Date From - To ~ Hours , Task I' Code NPT Phase Description of Operations 9/27/2008 20:00 - 22:00 2.00 DRILL P PROD1 -Pump dry job -Drop 2.3125" rabbit -MW in and out 8.5 ppg 22:00 - 00:00 2.00 DRILL P PROD1 POH from 10,908' and to 7,379' md. -Blow down top drive -PJSM with incoming crew 9/28/2008 00:00 - 02:30 2.50 DRILL P PROD1 POH from 7,379' to 215' md. 02:30 - 04:00 1.50 DRILL P PROD1 LD 6 1/4" BHA -PJSM for LD BHA, removing RA source -LD jars, pump-out sub, 3 flex DCs -LD MWD tool, flex LC, stabilizer, motor and bit -Monitor well -Static 04:00 - 05:00 1.00 DRILL P PROD1 Clean and clear rig floor of tools -Remove RA source containment, bit from floor -Bit grade: 5-6-BT-G-E-2/16-WT-TD -Remove wear bushing, install test plug -Blow down BOP stack 05:00 - 06:00 1.00 EVAL P PROD1 Test rams with 2 7/8" and 4 1/2" test jts -PU 2 7/8" and 4 1/2" test jnts and test to 250 psi low, 3500 psi high -Record on chart for 5 min each test; good test -RD and blow down test equipment -Install wear bushing 06:00 - 08:00 2.00 CASE P RUNPRD RU equipment to run liner -Casing tongs, torque turn computer, compensator 08:00 - 10:00 2.00 CASE P RUNPRD Run 4 112" reduction liner to 1 279' and -Make up float shoe assembly, RIH to test floats -Float shoe, float collar, landing collar, 29 its 4 1/2" 12.6# 13CR Vam Top tubing -One centralizer on jts 1 and 2; two centralizers on jts 3-25 -Baker-Lek first three jts 10:00 - 11:00 1.00 CASE P RUNPRD MU Baker Flexlock Liner Hanger and "HR" ZXP Liner Top Packer -Circulate 1 1/2 times liner volume -Pumps: 127 gpm, 63 psi -PUW=43k, SOW=45k -RD casing tongs 11:00 - 20:00 9.00 CASE P RUNPRD RIH 4 1/2" production liner on 4" DP from 1,406' to 10,864' md, 1 stand per minute -Fill DP every 15 stands -PUW=43k, SOW=45k -PJSM with incoming crew at 1130 hrs -Losses to well from 0000 to 1200 hrs=16 bbls 20:00 - 21:00 1.00 CASE P RUNPRD Circulate -Establish circulation slowly while monitoring for losses -Circulate 1 1/2 DP and liner volume at 5 bpm, 210 gpm, 525 psi -Stage pumps: 3bpm= 302 psi, 5 bpm= 521 psi -Stop circulation, monitor well -Static 21:00 - 22:00 1.00 CASE P RUNPRD RIH with 4 1/2" liner on 4" DP to 12,039' TD. -MU cement head, RIH to TD. -RIH with liner shoe to 1' and above TD at 12,039' -Confirmed tag with 8k down weight rrintea: iuitirwuu zau:zo rm • • BP Exploration Page 11 of 14 Operations Summary Report Legal Well Name: Common Well Name Event Name: Contractor Name: Rig Name: Date From - To 9/28/2008 21:00 - 22:00 22:00 - 00:00 9/29/2008 100:00 - 00:30 W -31 W -31 REENTER+COMPLETE NABOBS ALASKA DRILLING I NABOBS 7ES Hours Task I Code NPT I _ Spud Date: 12/24/1988 Start: 9/1 /2008 End: Rig Release: 10/2/2008 Rig Number: Phase Description of Operations 1.00 CASE P RUNPRD -PUW=175k, SOW=135k 2.00 CEMT P RUNPRD Circulate and condition well for cement -Establish circulation slowly; circulate mud to condition for cementing -Pump rates: 2bpm=416 psi, 3 bpm=508 psi, 4 bpm=622 psi, 5 bpm=824 psi -PU 1', verify TD at 12,039' and again -Reciprocate string 5-6' several times -PUW=175k, SOW=135k -PJSM with SLB, crew, WSL, Tourpusher -Start hatching cement at 2347 hrs 00:30 - 01:45 01:45 - 03:30 03:00 - 05:30 05:30 - 06:00 06:00 - 12:00 0.50 CEMT P RUNPRD Continue circulating to prepare for cementing -Circulate total 395 bbls at 167 gpm, 650 psi -PUW=175k, SOW=140k 1.25 CEMT P RUNPRD Cement liner per cement plan -Pressure test cement lines to 4,500 psi -Pump 25 bbls of MudPUSH II ~ 10 ppg -Pump 34 bbls of Class G tail ~ 15.8 ppg at 4-5 bpm -Switch over to rig pumps, kick plug out with 18 bbls 8.4 ppg pert pill -Positive indication plug left cement head -Displace cement with 107 bbls 8.5 ppg FloPro mud -103 bbls to latch liner wiper plug at 3 bpm, 650 psi spike -Total of 120 bbls to bump the plug at 2 bpm, bumped plug with 700 psi spike -Reciprocated pipe 10-12' strokes through whole job until just 1.75 CEMT P RUNPRD Pressure to 3000 to set hanger packer -Set down 100k -Pressure up 4000 psi to release HR tool -Bleed pressure to zero and check floats -Monitor well at floor for flow -Static -Pick up to expose dogs on ZXP liner packer, set down 75k; surface indication of packer set -Slack off, rotate 5 rpm to confirm set -Pull up 20' to circulate cement off top of liner -Top of liner at 10,783', shoe at 12,039' and -Pumps 480 gpm, 1375 psi to clear cement in well above liner -Returns show 6 bbls cement to surface -RD cement head -Break down cement head, jt and pup 2.50 CEMT P RUNPRD Displace well -Pump 150 bbls fresh water spacer -Displace well to 8.5 ppg seawater from top of liner -Pumps: 500 gpm, 2100 psi -773 bbls pumped 0.50 CEMT P RUNPRD Slip and cut 108' of drilling line, inspect brakes 6.00 CEMT P RUNPRD POH from liner top at 10,783' to surface -LD 36 jts 4" DP -LD liner running tool -Inspected running tool; confirmed shear pins sheared rnntea: tuieizuuzi zau:za rm BP Exploration Page 12 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: Date From - To I Hours Task Code NPT .Phase Description of Operations 9/29/2008 06:00 - 12:00 6.00 CEMT P RUNPRD -Clear and clean rig floor -PJSM with incoming crew 12:00 - 12:30 0.50 EVAL P RUNPRD Pressure test 4 1/2" liner to 3500 psi for 30 min. -Chart test; good test 12:30 - 13:00 0.50 PERFO P OTHCMP RU equipment to pick up pert gun 13:00 - 16:30 3.50 PERFO P OTHCMP RIH with pert gun assembly -PJSM on handling and making up pert guns -Make up pert gun assembly to 2 7/8" PAC pipe and Fox pipe 16:30 - 21:00 4.50 PERFO P OTHCMP -RIH on 4" DP -Just before tag fill string with fluid and circulate air out -Tag Landing Collar at 11,951' and -Pick up from tag to pert de th at 11,900' and -PJSM with SLB pert crew, rig crew, Tourpusher, WSL 21:00 - 22:00 1.00 PERFO P OTHCMP Perforate -Function test and close rams on 4" DP -Prepare for perforation by staging pumps to test pressure -Stage pumps to 500 psi, hold for 1 min -Increase to 700 psi, hold for 1 min -Drop pressure to 50 psi, hold for 2 min -Increase pressure to 1000 psi, hold for 2 min -Bleed pressure to 0 psi -Clear indication at surface of both firing heads -Initial loss to well 2 bbls -Monitor well -Static Perforation Intervals: 11210-11280 11690-11705 11717-11727 11836-11854 11870-11880 11890-11900 22:00 - 22:30 0.50 PERFO P OTHCMP POH from 11,900'to 11,180' and 22:30 - 00:00 1.50 PERFO P OTHCMP Circulate -Pump 20 bbl pert pill -Circulate bottoms up at 400 gpm, 1906 psi -606 bbls pumped -Nothing noticeable to surface -Monitor well: losses to well during circulation 2.3 bbls first 15 min, 9 bbls/hr avg -PUW=170k, SOW=135k -8.5 ppg seawater in and out -Blow down kill line -PJSM with incoming crew 9/30/2008 00:00 - 05:30 5.50 PERFO P OTHCMP POH from 11,180' to 1,377' laying down 4" DP 05:30 - 06:00 0.50 PERFO P OTHCMP RIH with 4" DP stood back in Derrick to LD to pipe shed 06:00 - 06:30 0.50 PERFO P OTHCMP POH from 2,236' to 1,281' and laying down 4" DP 06:30 - 11:00 4.50 PERFO P OTHCMP RU pert gun handling equipment -PJSM on handling fired pert guns -LD 2 7/8" Fox and PAC pipe and pert gun assemblies -Inspect pert guns; confirmed all shots fired_ -RD handling equipment -Clear and clean rig floor 11:00 - 14:00 3.00 BUNCO RUNCMP RU completion running equipment ; rnntea: turoizuua zau:zo rm ~ ~ BP Exploration Page 13 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 'Event Name: REENTER+COMPLETE Contractor Name: NABOBS ALASKA DRILLING Rig Name: NABOBS 7ES Date i From - To Hours Task Code NPT 9/30/2008 11:00 - 14:00 3.00 BUNCO 14:00 - 00:00 10.00 BUNCO 10/1 /2008 00:00 - 09:00 9.00 09:00 - 11:00 2.00 11:00 - 12:00 1.00 12:00 - 12:30 0.50 RUN 12:30 - 16:30 4.00 RUN 16:30 - 18:30 2.00 RUN Spud Date: 12/24/1988 Start: 9/1 /2008 End: I Rig Release: 10/2/2008 Rig Number: Phase Description of Operations - ~ -- - RUNCMP -Pull wear bushing and make dummy run with tubing hanger -Rig up Halliburton "I" wire spooler and make up to Symphony Guage -PJSM on running completion string -RU Casing tongs, torque turn computer, compensator RUNCMP RIH with 4 1/2" 12.6# 13CR Vam To com letion strin -WLEG, XN nipple, 3 X nipple assblys, S-3 packer, 8GLMs (DCR shear valve on #7), Symphony Downhole gauge and "I" wire, 246 jts tubing -Make up torque avg = 4,440 ft/Ibs -Baker-Lok all connections below S-3 packer -107 jts of 246 jts run at Tour change -PJSM with incoming crew RUNCMP RIH with 4 1/2" 12.6# 13CR Vam Top completion string with "1" wire -RIH from 4,825' to 10,783' and -Avg makeup torque= 4,440 fUlbs RUNCMP RIH with WLEG -Pick up and repeat tag up sequence to ensure entry into tie-back sleeve -Space out with 9.85' pup joint place one full jt below hanger -Total 246 jts run 4 1/2" 12.6# 13CR Vam Top completion string with "t" wire -236 full clamps and 14 half clamps run for securing "I" wire RUNCMP Cut "I" wire and run through hanger -Test "I" void on hanger to 5000 psi -good test RUNCMP Land tubing hanger with 112k; run in lock down screws; RUNCMP Reverse circulate corrosion inhibitor -Reverse circulate 163 bbls clean seawater into annulus -Follow with 364 bbls seawater treated with corrosion inhibitor into annulus -Displace with 172 bbl clean seawater (to position inhibited water between packer and GLM with shear valve) at 3 bpm, 150 psi RUNCMP Drop ball and rod to set packer - ~ Cai wuu iy wi vv nun a~ .~ v Noy -Slowly bleed pressure to 1500 psi -Pressure up annulus to 3500 psi for 30 min -Bleed pressure off of annulus to 0 psi and then tubing to 0 psi -Pressure up annulus to 3000 psi to shear DCR valve in GLM #7 18:30 - 19:30 I 1.00 19:30 - 20:30 20:30 - 23:00 23:00 - 00:00 1.00 RUNCOt~ 2.50 WHSUR P 1.00 WHSUR P 110/2/2008 100:00-01:00 1.00 WHSUR ~ P -Valve sheared at 2410 psi -Confirmed shear by pumping 5 bbls through annulus and through tubing RUNCMP Install TWC and test from below to 1000 psi for 5 min -Good test -Blow down choke and kill lines RUNCMP ND BOP RUNCMP NU adapter and tree with "I" wire connection RUNCMP Pressure test adapter, tree and pack-off to 5000 psi for 30 min -Pressure test using diesel RUNCMP RU lubricator to pull TWC rnniea: i uioizuvo z: i u:~a rm BP Exploration Page 14 of 14 Operations Summary Report Legal Well Name: W-31 Common Well Name: W-31 Spud Date: 12/24/1988 Event Name: REENTER+COMPLETE Start: 9/1/2008 End: Contractor Name: NABOBS ALASKA DRILLING I Rig Release: 10/2/2008 Rig Name: NABOBS 7ES Rig Number: Date From - To Hours ~ Task Code ~ NPT ~ Phase Description of Operations 10/2/2008 00:00 - 01:00 1.00 WHSUR P RUNCMP -RD lubricator 01:00 - 03:30 2.50 WHSUR P RUNCMP RU Little Red Hot Oil Services -Pressure test lines to 3500 psi -Reverse circulate 151 bbls diesel at 2 bpm into inner annulus -Allow diesel to U-tube 03:30 - 04:00 0.50 WHSUB P RUNCMP Install BPV and test from below to 1000 si usin LRHOS lines -RD Little Red Hot Oil Service 04:00 - 06:00 2.00 WHSUR P POST Secure well & release rig at 06:00 hrs rnntea: iwtiizuus znu:zts rnn ~- .__ _. _ _ _ Schlumber~er vv-~~ ~- ,urvey Report Report Date: September 30, 2008 Survey /DLS Computation Method: Minimum Curvature / Lubinski Client: BP Exploration Alaska Vertical Section Azimuth: 345.00° Field: Prudhoe Bay Unit - WOA Vertical Section Origin: N 0.000 ft, E 0.000 ft Structure /Slot: W-PAD / W-31 TVD Reference Datum: Rotary Table Well: W-31 TVD Reference Elevation: 80.48 ft relative to MSL Borehole: W-31 A Sea Bed /Ground Level Elevation: 52.88 ft relative to MSL UWVAPI#: 500292190001 Magnetic Declination: 22.842° Survey Name /Date: W-31 A /September 27, 2008 Total Field Strength: 57669.043 nT Tort /AHD / DDI / ERD ratio: 251.833° / 6255.13 ft / 6.322 / 0.692 Magnetic Dip: 80.868° Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: September 22, 2008 Location LaVLong: N 70.29826218, W 149.09468404 Magnetic Declination Model: BGGM 2008 Location Grid NIE Y/X: N 5959482.870 ftUS, E 611788.980 ftUS North Reference: True Norlh Grid Convergence Angle: +0.85232714° Total Corr Mag North -> True Norlh: +22.842° Grid Scale Factor: 0.99991420 Local Coordinates Referenced To: Well Head Comments Measured Inclination Azimuth Subsea TVD TVD Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure ft de de ft ft ft ft ft ft ft de 100 ft ftUS ftUS n ec n nc n nn coon oo nn Ri 17r2R Sd AI 7n 90A9C.nQ1 \A/ id0 nQdRR7R7 RTE (Interpolateo) u.uu v.uz ZZ4. VU -8V.48 V.vv -v.oo v.vv v.~o -v.w -~•-~~+ ~•~~ ~~~~~~~•~~ ~ ~ ~ • `"~•"~ ~ ~ • "•'-""'-"~" • •• •"• -° •"-'• °• Boss Gyro 189.58 0.37 224. 00 109.10 189.58 -0.66 0.64 1.29 -0.93 -0.90 0.19 5959481.93 611788.10 N 70.29825965 W 149. 09469129 289.58 0.47 178. 90 209.09 289.57 -1.23 1.34 1.92 -1.57 -1.11 0.34 5959481.28 611787.89 N 70.29825789 W 149. 09469304 389.58 0.62 141. 50 309.09 389.57 -2.12 2.26 2.52 -2.40 -0.77 0.38 5959480.46 611788.25 N 70.29825561 W 149. 09469025 489.58 0.67 110. 61 409.08 489.56 -2.96 3.36 3.04 -3.03 0.12 0.35 5959479.84 611789.14 N 70.29825390 W 149. 09468310 589.58 0.62 105. 70 509.08 589.56 -3.58 4.48 3.59 -3.39 1.18 0.07 5959479.50 611790.21 N 70.29825293 W 149. 09467445 689.58 0.77 102. 40 609.07 689.55 -4.16 5.70 4.37 -3.68 2.36 0.16 5959479.23 611791.40 N 70.29825214 W 149. 09466491 789.58 0.87 105. 70 709.06 789.54 -4.86 7.13 5.50 -4.03 3.75 0.11 5959478.90 611792.79 N 70.29825118 W 149. 09465368 889.58 0.77 107. 00 809.05 889.53 -5.60 8.56 6.77 -4.43 5.12 0.10 5959478.52 611794.17 N 70.29825009 W 149. 09464256 989.58 0.60 113. 00 909.04 989.52 -6.28 9.75 7.90 -4.83 6.25 0.18 5959478.14 611795.30 N 70.29824899 W 149. 09463346 1089.58 0.55 120. 31 1009.04 1089.52 -6.94 10.75 8.88 -5.28 7.14 0.09 5959477.70 611796.20 N 70.29824777 W 149 .094 1189.58 0.25 134. 20 1109.04 1189.52 -7.47 11.45 9.57 -5.67 7.71 0.31 5959477.32 611796.78 N 70.29824669 W 149 6 .0946 1289.58 0.32 113. 31 1209.03 1289.51 -7.83 11.94 10.06 -5.93 8.13 0.12 5959477.06 611797.19 N 70.29824597 W 149 .094618 1389.58 0.17 116. 61 1309.03 1389.51 -8.10 12.37 10.48 -6.11 8.52 0.15 5959476.89 611797.58 N 70.29824549 W 149 .09461508 1489.58 0.05 74. 10 1409.03 1489.51 -8.20 12.55 10.65 -6.16 8.69 0.14 5959476.84 611797.76 N 70.29824534 W 149 .09461367 1589.58 0.07 135. 70 1509.03 1589.51 -8.26 12.64 10.74 -6.20 8.77 0.06 5959476.81 611797.85 N 70.29824526 W 149 .09461298 1689.58 0.07 175. 70 1609.03 1689.51 -8.37 12.76 10.84 -6.30 8.82 0.05 5959476.70 611797.89 N 70.29824497 W 149 .09461260 1789.58 0.10 178 .70 1709.03 1789.51 -8.51 12.91 10.93 -6.45 8.83 0.03 5959476.55 611797.90 N 70.29824456 W 149 .09461255 1889.58 0.02 198 .10 1809.03 1889.51 -8.61 13.01 10.99 -6.55 8.83 0.08 5959476.45 611797.90 N 70.29824428 W 149 .09461258 1989.58 0.07 180 .89 1909.03 1989.51 -8.69 13.09 11.03 -6.63 8.82 0.05 5959476.37 611797.90 N 70.29824407 W 149 .09461263 2089.58 0.12 188 .89 2009.03 2089.51 -8.84 13.26 11.12 -6.79 8.80 0.05 5959476.21 611797.88 N 70.29824362 W 149 .09461277 2189.58 0.25 168 .70 2109.03 2189.51 -9.15 13.58 11.34 -7.11 8.83 0.14 5959475.89 611797.91 N 70.29824275 W 149 .09461255 2289.58 0.27 200 .39 2209.03 2289.51 -9.56 14.02 11.58 -7.55 8.79 0.14 5959475.46 611797.88 N 70.29824156 W 149 .09461287 SurveyEditor Ver SP 2.1 Bld( doc40x_100) W-31\W-31\W-31A\W-31A Generated 10/23/2008 3:23 PM Page 1 of 5 Comments Measured Inclination Azimuth SutrSea ND ND Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure ft de de ft ft ft ft tt ft ft de OOtt ftUS ftUS 1:itSy.bt3 v.G/ [[/.5u ~SUa.va caaa.o I 2489.58 0.32 237.30 2409.03 2489.51 2589.58 0.27 241.69 2509.03 2589.51 2689.58 0.40 237.39 2609.03 2689.51 2789.58 1.00 254.10 2709.02 2789.50 2889.58 3.15 272.90 2808.95 2889.43 2989.58 6.02 275.00 2908.62 2989.10 3089.58 8.97 275.50 3007.75 3088.23 3189.58 12.30 277.61 3106.02 3186.50 3289.58 15.02 279.81 3203.18 3283.66 3389.58 17.97 281.20 3299.06 3379.54 3489.58 20.92 281.81 3393.34 3473.82 3589.58 23.27 282.11 3485.99 3566.47 3689.58 26.10 281.61 3576.85 3657.33 3789.58 29.00 278.61 3665.50 3745.98 3889.58 31.97 276.11 3751.67 3832.15 3989.58 35.02 275.61 3835.06 3915.54 4089.58 37.92 275.40 3915.46 3995.94 4189.58 41.28 275.31 3992.50 4072.98 4289.58 44.17 275.81 4065.96 4146.44 4389.58 47.37 276.20 4135.70 4216.18 4489.58 49.62 276.31 4201.97 4282.45 4589.58 49.62 276.31 4266.75 4347.23 4689.58 48.67 276.50 4332.17 4412.65 4789.58 48.77 276.31 4398.14 4478.62 4889.58 48.83 276.81 4464.01 4544.49 4989.58 49.17 277.00 4529.62 4610.10 5089.58 49.37 277.00 4594.87 4675.35 5189.58 49.42 277.31 4659.95 4740.43 5289.58 49.65 277.40 4724.85 4805.33 5389.58 49.62 277.81 4789.61 4870.09 5489.58 49.97 277.90 4854.17 4934.65 5589.58 50.15 278.00 4918.36 4998.84 5689.58 49.87 277.81 4982.63 5063.11 5789.58 50.02 278.00 5046.98 5127.46 5889.58 50.12 278.20 5111.17 5191.65 5989.58 50.50 278.31 5175.03 5255.51 6089.58 50.42 278.61 5238.69 5319.17 6189.58 50.45 278.70 5302.39 5382.87 6289.58 50.00 278.61 5366.36 5446.84 6389.58 50.12 279.11 5430.56 5511.04 -x.80 14.40 I 1 .OJ -10.06 15.00 11.57 -10.20 15.51 11.46 -10.36 16.09 11.36 -10.48 17.31 11.03 -9.65 20.90 9.65 -7.01 28.90 10.32 -2.48 41.94 19.97 4.34 60.39 37.20 13.88 84.00 60.17 26.13 112.39 88.12 41.00 145.68 121.09 58.05 183.29 158.48 76.91 225.05 200.09 96.48 271.28 246.29 115.72 322.00 297.00 135.36 377.18 352.15 156.18 436.62 411.55 178.35 500.35 475.25 202.18 568.19 543.07 227.87 639.84 614.71 255.01 714.72 689.59 282.70 790.90 765.77 310.30 866.53 841.40 337.73 941.68 916.55 365.38 1016.92 991.79 393.53 1092.40 1067.26 421.92 1168.17 1143.04 450.55 1244.10 1218.96 479.49 1320.18 1295.03 508.78 1396.37 1371.22 538.44 1472.74 1447.58 568.34 1549.42 1524.24 598.15 1626.03 1600.84 627.95 1702.57 1677.37 658.03 1779.26 1754.04 688.41 1856.21 1830.98 719.11 1933.33 1908.07 750.05 2010.42 1985.14 780.88 2087.27 2061.97 811.90 2163.94 2138.61 -/.AJ O.JJ V.IJ JJ:.1JY/:J. VI /. it /v.cVVCYV.' rr ~tV. v./YV~Y./t -8.24 8.12 0.07 5959474. 76 611797.23 N 70.29823968 W 149.09461825 -8.50 7.68 0.05 5959474. 49 611796.79 N 70.29823896 W 149.09462183 -8.80 7.18 0.13 5959474. 18 611796.29 N 70.29823814 W 149.09462589 -9.23 6.05 0.63 5959473. 74 611795.16 N 70.29823698 W 149.09463507 -9.33 2.46 2.23 5959473. 58 611791.58 N 70.29823670 W 149.09466409 -8.73 -5.51 2.87 5959474. 06 611783.61 N 70.29823833 W 149.09472862 -7.53 -18.49 2.95 5959475. 07 611770.60 N 70.29824162 W 149.09483378 -5.37 -36.82 3.35 5959476. 96 611752.25 N 70.29824752 W 149.09498214 -1.75 -60.15 2.77 5959480. 23 611728.87 N 70.29825740 W 149.09517106 3.46 -88.05 2.98 5959485. 02 611700.89 N 70.29827162 W 149.095397 10.11 -120.67 2.96 5959491. 18 611668.19 N 70.29828979 W 149.0956 17.91 -157.46 2.35 5959498. 43 611631.28 N 70.29831110 W 149.09595906 26.48 -198.33 2.84 5959506. 40 611590.29 N 70.29833452 W 149.09628999 34.54 -243.86 3.21 5959513. 77 611544.66 N 70.29835653 W 149.09665864 40.99 -294.16 3.23 5959519. 47 611494.27 N 70.29837414 W 149.09706597 46.61 -349.05 3.06 5959524. 28 611439.30 N 70.29838950 W 149.09751046 52.31 -408.21 2.90 5959529. 10 611380.07 N 70.29840505 W 149.09798950 58.26 -471.67 3.36 5959534. 10 611316.54 N 70.29842129 W 149.09850333 64.84 -539.19 2.91 5959539. 67 611248.93 N 70.29843926 W 149.09905007 72.34 -610.44 3.21 5959546. 11 611177.59 N 70.29845973 W 149.09962703 80.50 -684.88 2.25 5959553 .17 611103.04 N 70.29848201 W 149.10022980 88.87 -760.59 0.00 5959560 .41 611027.22 N 70.29850486 W 149.10084290 97.31 -835.76 0.96 5959567 .73 610951.94 N 70.29852789 W 149.10145155 105.69 -910.44 0.17 5959575 .00 610877.15 N 70.29855077 W 149.10205627 114.29 -985.19 0.38 5959582 .48 610802.29 N 70.29857423 W 149.10266156 123.36 -1060.11 0.37 5959590 .44 610727.25 N 70.29859899 W 149.10326826 132.60 -1135.32 0.20 5959598 .55 610651.91 N 70.29862419 W 149.1038773 142.05 -1210.65 0.24 5959606 .89 610576.45 N 70.29864999 W 149.10448 151.79 -1286.11 0.24 5959615 .50 610500.87 N 70.29867656 W 149.10509 161.87 -1361.63 0.31 5959624 .46 610425.21 N 70.29870407 W 149.10570988 172.31 -1437.29 0.36 5959633 .77 610349.41 N 70.29873255 W 149.10632253 182.92 -1513.22 0.20 5959643 .24 610273.34 N 70.29876148 W 149.10693743 193.45 -1589.11 0.32 5959652 .65 610197.31 N 70.29879022 W 149.10755195 203.98 -1664.93 0.21 5959662 .05 610121.35 N 70.29881894 W 149.10816589 214.79 -1740.84 0.18 5959671 .72 610045.29 N 70.29884841 W 149.10878066 225.84 -1817.00 0.39 5959681 .63 609968.98 N 70.29887854 W 149.10939734 237.18 -1893.28 0.24 5959691 .84 609892.55 N 70.29890949 W 149.11001504 248.78 -1969.49 0.08 5959702 .31 609816.18 N 70.29894113 W 149.11063220 260.35 -2045.47 0.46 5959712 .74 609740.04 N 70.29897267 W 149.11124749 272.16 -2121.23 0.40 5959723 .42 609664.13 N 70.29900487 W 149.11186097 SurveyEditor Ver SP 2.1 Bld( doc40x_100) W-31\W-31\W-31 A\W-31 A Generated 10/23/2008 3:23 PM Page 2 of 5 Comments Measured Inclination Azimuth Sub-Sea TVD TVD Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude pepm Section Departure ft de de tt ft ft ft ft ft tt de 100 tt ftUS ftUS Tie-In Survey TOW (Inc+Trend) BOW MWD+IFR+MS 64tty:btf bU.U/ L/`J. 4U 04`J4./L DO/J.LV 6589.58 49.77 279. 81 5559.10 5639.58 6689.58 49.77 280. 20 5623.69 5704.17 6789.58 49.53 280. 40 5688.43 5768.91 6889.58 50.12 280. 20 5752.94 5833.42 6989.58 50.22 279. 90 5817.00 5897.48 7089.58 7189.58 7289.58 7389.58 7489.58 7589.58 7689.58 7789.58 7889.58 7989.58 8089.58 8189.58 8289.58 8389.58 8489.58 50.42 279. 70 5880. 85 50.12 279. 61 5944. 76 50.17 279. 70 6008. 85 49.67 280. 20 6073. 23 49.02 280. 70 6138. 38 48.83 281. 11 6204. 09 48.27 281. 40 6270. 28 47.92 281. 70 6337. 07 47.02 282. 00 6404. 67 46.67 282. 00 6473. 07 46.27 45.72 45.27 45.92 47.02 282.70 283.11 283.70 284.81 285.31 285.81 286.20 286.90 287.40 287.11 287.00 286.70 286.90 287.31 288.00 6541.94 6611.41 6681.51 6751.48 6820.36 6887.66 6953.47 7017.95 7081.12 7144.06 8589.58 48.37 8689.58 49.33 8789.58 50.37 8889.58 51.27 8989.58 50.72 9089.58 50.37 9189.58 49.92 9289.58 49.62 9389.58 49.92 9489.58 49.87 9589.58 50.22 9689.58 50.12 9789.58 50.52 9789.58 50.52 9792.00 50.49 9809.00 9823.55 9919.86 10014.73 10110.66 52.35 51.14 47.49 41.30 36.97 288.40 289.11 289.81 289.81 289.75 290.85 290.85 296.40 295.73 302.14 7207.61 7271.69 7336.28 7400.86 7465.28 7529.50 7593.55 7657.40 7657.40 7658.94 7669.54 7678.55 7741.35 7809.11 7883.53 5961.33 6025.24 6089.33 6153.71 6218.86 6284.57 6350.76 6417.55 6485.15 6553.55 6622.42 6691.89 6761.99 6831.96 6900.84 04J.4 1 875.27 907.54 940.11 972.76 1005.27 1037.56 1069.64 1101.66 1133.94 1166.53 1199.47 1232.62 1265.89 1299.17 1332.29 1365.60 1399.26 1433.18 1468.10 1504.42 6968.14 1542.02 7033.95 1580.81 7098.43 1620.81 7161.60 1662.06 7224.54 1703.53 7288.09 1744.51 7352.17 1785.02 7416.76 1825.25 7481.34 1865.83 7545.76 1907.10 7609.98 7674.03 7737.88 7737.88 7739.42 7750.02 7759.03 7821.83 7889.59 7964.01 1949.07 1991.74 2035.29 2035.29 2036.35 2044.03 2050.73 2096.20 2139.79 2181.63 LL'iV.OJ GL I:J.GV cVY.Y~ 'L I.~v.aY v.c.~ .~.i.i.ii ~~.vv 2317.17 2291.74 2393.51 2368.01 2469.72 2444.14 2546.13 2520.46 2622.93 2597.19 2699.89 2674.11 2776.80 2750.98 2853.56 2827.71 2930.08 2904.18 3005.94 2979.97 3081.32 3156.28 3230.70 3304.39 3377.35 3449.85 3521.77 3593.09 3664.53 3737.03 3810.99 3886.28 3962.72 4040.23 4117.94 3055.27 3130.11 3204.41 3277.96 3350.77 3423.10 3494.82 3565.89 3637.00 3709.08 3782.55 3857.30 3933.12 4009.93 4086.94 297.26 -2272.38 310.52 -2347.56 324.15 -2422.55 337.81 -2497.72 351.21 -2573.34 364.31 -2649.18 377.21 -2724.99 390.09 -2800.67 403.30 -2876.04 417.06 -2950.64 431.32 -3024.67 445.95 -3098.18 460.85 -3171.10 475.98 -3243.22 491.15 -3314.57 506.66 -3385.40 522.72 -3455.51 539.25 -3524.88 556.85 -3594.12 575.69 -3664.13 595.53 -3735.37 616.29 -3807.75 638.07 -3881.02 660.93 -3955.09 683.98 -4029.30 0.43 5959746.27 0.30 5959758.41 0.28 5959770.92 0.61 5959783.46 0.25 5959795.74 0.25 5959807.71 0.31 5959819.47 0.09 5959831.22 0.63 5959843.32 0.75 5959855.96 0.36 5959869.12 0.60 5959882.65 0.42 5959896.46 0.93 5959910.52 0.35 5959924.62 0.65 5959939.07 0.62 5959954.09 0.62 5959969.59 1.03 5959986.15 1.16 5960003.94 1.40 5960022.72 1.00 5960042.40 1.17 5960063.08 0.98 5960084.84 0.59 5960106.78 0.36 5960128.32 0.51 5960149.48 0.34 5960170.45 0.43 5960191.82 0.53 5960213.93 0.47 5960236.78 0.55 5960260.39 0.67 5960284.94 6.41 5960284.94 2.28 5960285.55 12.05 5960289.97 8.32 5960293.88 5.78 5960322.03 6.54 5960350.31 6.17 5960378.63 4195.16 4163.52 706. 62 -4103.11 4271.92 4239.71 728. 88 -4176. 58 4348.27 4315.51 750. 94 -4249. 67 4424.61 4391.28 773. 40 -4322. 64 4501.10 4467.12 796. 59 -4395. 52 4577.75 4543.06 820. 54 -4468. 34 4654.55 4619.05 845. 23 -4541. 06 4731.51 4695.10 870. 87 -4613. 62 4731.51 4695.10 870. 87 -4613. 62 4733.38 4696.94 871. 50 -4615. 38 4746.67 4710.04 876. 11 -4627 .84 4758.09 4721.29 880. 18 -4638 .52 4831.09 4792.47 909. 33 -4705 .41 4897.43 4856.54 938. 50 -4764 .99 4957.92 4914.19 967 .61 -4817 .98 609512.63 N 70.29907333 W 149.11308502 609437.26 N 70.29910951 W 149.11369387 609362.09 N 70.29914667 W 149.11430109 609286.73 N 70.29918392 W 149.11490988 609210.93 N 70.29922046 W 149.11552224 609134.91 N 70.29925618 W 149.11613640 609058.92 N 70.29929134 W 149.11675039 608983.06 N 70.29932644 W 149.11736326 608907.51 N 70.29936248 W 149.11797358 608832.72 N 70.29939998 W 149.11857776 608758.50 N 70.29943886 W 149.1191 608684.78 N 70.29947874 W 149.11977257 608611.66 N 70.29951937 W 149.12036310 608539.33 N 70.29956062 W 149.12094718 608467.76 N 70.29960197 W 149.12152507 608396.72 N 70.29964425 W 149.12209864 608326.38 N 70.29968804 W 149.12266645 608256.78 N 70.29973312 W 149.12322831 608187.29 N 70.29978110 W 149.12378906 608117.01 N 70.29983248 W 149.12435607 608045.49 N 70.29988659 W 149.12493308 607972.82 N 70.29994321 W 149.12551928 607899.24 N 70.30000260 W 149.12611269 607824.85 N 70.30006494 W 149.12671259 607750.31 N 70.30012781 W 149.12731366 607676.17 N 70.30018956 W 149.12791153 607602.38 N 70.30025025 W 149.12850660 607528.98 N 70.30031042 W 149.1290 607455.69 N 70.30037165 W 149.1296 607382.48 N 70.30043491 W 149.13027992 607309.32 N 70.30050020 W 149.13086974 607236.25 N 70.30056753 W 149.13145874 607163.32 N 70.30063746 W 149.13204651 607163.32 N 70.30063746 W 149.13204651 607161.55 N 70.30063918 W 149.13206075 607149.02 N 70.30065176 W 149.13216170 607138.29 N 70.30066285 W 149.13224818 607070.98 N 70.30074238 W 149.13279003 607010.97 N 70.30082197 W 149.13327270 606957.56 N 70.30090141 W 149.13370198 SurveyEditor Ver SP 2.1 Bld( doc40x_100) W-31 \W-31 \W-31 A\W-31 A Generated 10/23/2008 3:23 PM Page 3 of 5 Comments Measured Inclination Azimuth Sub-Sea ND ND Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure tt de de ft ft tt ft ft ft ft de 00 ft ftUS ftUS 10206.57 31.44 312.81 7962.89 8043.37 2224.01 5011.71 4962.63 1000.01 -4860. 83 8.49 5960410.38 606914.24 N 70.30098984 W 149.13404911 10301.82 27.92 323.34 8045. 69 8126.17 2265.80 5058.77 5000.64 1034.82 -4892.40 6.59 5960444.71 606882.16 N 70.30108487 W 149.13430496 10398.07 28.44 333.87 8130. 58 8211.06 2309.26 5104.12 5031.80 1073.49 -4915. 96 5.19 5960483.03 606858.03 N 70.30119049 W 149.13449599 10447.91 28.11 336.45 8174. 48 8254.96 2332.52 5127.73 5046.10 1094.91 -4925. 88 2.54 5960504.30 606847.79 N 70.30124899 W 149.13457643 10492.70 29.10 345.10 8213. 82 8294.30 2353.85 5149.14 5057.37 1115.12 -4932. 90 9.50 5960524.40 606840.47 N 70.30130418 W 149.13463338 10541.64 28.98 350.84 8256. 61 8337.09 2377.55 5172.88 5067.36 1138.33 -4937. 85 5.70 5960547.53 606835.18 N 70.30136758 W 149.13467358 10589.12 30.04 357.36 8297. 95 8378.43 2400.61 5196.25 5074.94 1161.56 -4940. 23 7.12 5960570.72 606832.46 N 70.30143105 W 149.13469297 10637.51 30.06 0.46 8339. 83 8420.31 2424.12 5220.47 5080.99 1185.78 -4940. 69 3.21 5960594.93 606831.64 N 70.30149722 W 149.13469683 10684.46 29.01 0.72 8380. 68 8461.16 2446.41 5243.62 5086.21 1208.93 -4940. 45 2.25 5960618.07 606831.53 N 70.30156044 W 149.13469503 10735.10 27.73 359.73 8425. 24 8505.72 2469.63 5267.68 5091.89 1232.99 -4940. 35 2.69 5960642.13 606831.27 N 70.30162617 W 149.13469436 10780.78 29.98 1.73 8465. 25 8545.73 2490.84 5289.72 5096.98 1255.03 -4940. 06 5.36 5960664.17 606831.24 N 70.30168638 W 149.1346 10828.87 29.00 0.20 8507. 11 8587.59 2513.60 5313.39 5102.47 1278.69 -4939. 65 2.57 5960687.84 606831.29 N 70.30175104 W 149.13468 10867.45 28.44 0.01 8540. 94 8621.42 2531.50 5331.93 5107.12 1297.23 -4939. 62 1.47 5960706.37 606831.05 N 70.30180169 W 149.13468877 10874.56 28.10 359.64 8547. 20 8627.68 2534.75 5335.30 5107.98 1300.60 -4939. 63 5.38 5960709.74 606830.99 N 70.30181089 W 149.13468887 10929.01 27.62 359.63 8595. 34 8675.82 2559.37 5360.74 5114.68 1326.04 -4939. 79 0.88 5960735.18 606830.45 N 70.30188040 W 149.13469032 10962.24 27.35 359.62 8624. 82 8705.30 2574.21 5376.08 5118.77 1341.38 -4939. 89 0.81 5960750.51 606830.12 N 70.30192230 W 149.13469122 10994.02 30.62 359.82 8652. 62 8733.10 2589.10 5391.48 5122.90 1356.78 -4939. 96 10.29 5960765.90 606829.82 N 70.30196436 W 149.13469190 11025.89 32.14 1.85 8679. 82 8760.30 2605.06 5408.07 5127.08 1373.37 -4939. 72 5.81 5960782.49 606829.82 N 70.30200968 W 149.13468997 11058.11 34.09 0.05 8706. 81 8787.29 2621.99 5425.67 5131.55 1390.97 -4939. 43 6.78 5960800.09 606829.84 N 70.30205776 W 149.13468776 11101.61 40.70 358.51 8741. 35 8821.83 2647.58 5452.08 5139.11 1417.36 -4939. 79 15.35 5960826.48 606829.09 N 70.30212988 W 149.13469081 11153.37 48.44 358.43 8778. 20 8858.68 2682.88 5488.37 5150.17 1453.65 -4940. 76 14.95 5960862.74 606827.58 N 70.30222900 W 149.13469886 11185.54 48.00 358.00 8799. 63 8880.11 2706.23 5512.36 5157.70 1477.63 -4941. 51 1.69 5960886.70 606826.47 N 70.30229451 W 149.13470504 11216.96 48.13 359.74 8820. 63 8901.11 2728.92 5535.73 5164.88 1500.99 -4941. 97 4.14 5960910.06 606825.67 N 70.30235834 W 149.13470890 11248.70 47.71 358.94 8841. 90 8922.38 2751.75 5559.29 5172.04 1524.55 -4942. 24 2.29 5960933.61 606825.05 N 70.30242270 W 149.13471121 11281.41 52.63 359.52 8862. 85 8943.33 2776.09 5584.40 5179.81 1549.66 -4942. 57 15.10 5960958.70 606824.34 N 70.30249129 W 149.13471404 11312.12 57.97 357.37 8880 .32 8960.80 2800.63 5609.64 5188.08 1574.88 -4943. 27 18.31 5960983.92 606823.26 N 70.30256021 W 149.13471985 11345.70 59.99 0.18 8897 .63 8978.11 2828.58 5638.42 5197.46 1603.65 -4943. 88 9.36 5961012.67 606822.23 N 70.30263879 W 149.13472492 11378.09 63.54 0.21 8912 .95 8993.43 2856.11 5666.95 5206.25 1632.18 -4943. 78 10.96 5961041.19 606821.90 N 70.30271674 W 149.13472 11408.94 65.26 0.71 8926 .28 9006.76 2882.93 5694.77 5214.82 1660.00 -4943. 56 5.76 5961069.01 606821.71 4 N 70.30279274 W 149.13472 11440.99 70.47 359.78 8938 .35 9018.83 2911.56 5724.44 5224.23 1689.68 -4943 .44 16.48 5961098.68 606821.39 N 70.30287381 W 149.13472 11472.82 76.51 359.21 8947 .39 9027.87 2941.09 5754.95 5234.43 1720.18 -4943 .71 19.05 5961129.18 606820.67 N 70.30295714 W 149.13472415 11504.78 82.55 358.11 8953 .20 9033.68 2971.62 5786.36 5245.53 1751.58 -4944 .44 19.20 5961160.56 606819.46 N 70.30304294 W 149.13473029 11536.62 88.85 357.83 8955 .58 9036.06 3002.54 5818.10 5257.26 1783.30 -4945 .57 19.81 5961192.25 606817.87 N 70.30312958 W 149.13473956 11569.29 94.78 359.63 8954 .55 9035.03 3034.25 5850.73 5269.10 1815.93 -4946 .29 18.97 5961224.87 606816.66 N 70.30321872 W 149.13474560 11602.33 97.50 0.33 8951 .02 9031.50 3065.98 5883.58 5280.52 1848.78 -4946 .31 8.50 5961257.71 606816.16 N 70.30330845 W 149.13474587 11633.17 103.06 1.28 8945 .52 9026.00 3095.16 5913.92 5290.82 1879.11 -4945 .88 18.28 5961288.04 606816.13 N 70.30339131 W 149.13474260 11664.49 109.20 2.24 8936 .82 9017.30 3123.96 5943.99 5300.71 1909.16 -4944 .96 19.82 5961318.10 606816.60 N 70.30347343 W 149.13473531 11696.48 112.42 2.27 8925 .45 9005.93 3152.51 5973.89 5310.45 1939.04 -4943 .79 10.07 5961347.99 606817.33 N 70.30355505 W 149.13472594 11727.86 118.18 1.87 8912 .05 8992.53 3179.62 6002.25 5319.91 1967.38 -4942 .76 18.39 5961376.34 606817.94 N 70.30363247 W 149.13471778 11759.81 119.46 1.42 8896 .65 8977.13 3206.44 6030.24 5329.57 1995.36 -4941 .95 4.19 5961404.33 606818.33 N 70.30370891 W 149.13471141 SurveyEditor Ver SP 2.1 Bld( doc40x_100) W-31\W-31\W-31 A\W-31 A Generated 10/23/2008 3:23 PM Page 4 of 5 Comments Measured Inclination Azimuth SulrSea ND ND Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure ft de de ft ft ft ft ft ft ft de 100 ft ftUS ftUS ~ ~ /y~ .y/ 1 LU.3L V.31 aaaV.oc OHO I . I U JLJJ.LV OV.70. I L JJJD.VO LVLJ.LV -Y.7Y I .JJ Y.V I JJV I'rJC.cv 11823.58 126.49 2.18 8863.23 8943.71 3258.58 6084.49 5349.22 2049.60 -4940.97 20.13 5961458.58 11855.74 126.94 2.28 8844.00 8924.48 3283.21 6110.27 5358.21 2075.37 -4939.97 1.42 5961484.35 11887.41 127.03 0.04 8824.94 8905.42 3307.50 6135.57 5367.59 2100.66 -4939.46 5.66 5961509.64 11918.96 127.54 1.18 8805.83 8886.31 3331.68 6160.67 5377.22 2125.76 -4939.19 3.30 5961534.74 11951.06 127.98 0.75 8786.18 8866.66 3356.08 6186.05 5386.91 2151.13 -4938.77 1.73 5961560.11 Last Survey 11991.79 128.30 359.44 8761.02 8841.50 3387.01 6218.08 5399.73 2183.16 -4938.71 2.65 5961592.14 TD (Projected) 12039.00 128.30 359.44 8731.76 8812.24 3422.88 6255.13 5415.14 2220.21 -4939.07 0.00 5961629.17 Survey Type: Definitive Survey NOTES: BOSS GYRO (Sperry-Sun BOSS gyro multishot --Sperry Sun BOSS multishot surveys ) INC+TREND (Inclinometer + known azi trend -- Inclination only surveys in near-vertical hole-where formation dip and experience enables direction of drift to be predicted. Replaces ex-BP "Inclinometer (azimuth in known q uadrant)" model. ) MWD + IFR + MS - (In-field referenced MWD with mull-station analysis and correction applied in post-processing. Assumes a BHA sag correction is applied to enhance inclination accuracy. ) Legal Description: Northing (Y) fftUSl Easting (Xl fftUSl Surface : 4509 FSL 1443 FEL S21 T11 N R12E UM 5959482.87 611788.98 Tie-In : 4509 FSL 1443 FEL S21 Ti 1 N R12E UM 5959482.40 611788.54 BHL : 1448 FSL 1097 FEL S17 T11 N R12E UM 5961629.17 606817.86 606818.50 N 70.30385711 W 149.13470377 606819.12 N 70.30392749 W 149.13469578 606819.26 N 70.30399658 W 149.13469176 606819.15 N 70.30406515 W 149.13468974 606819.20 N 70.30413447 W 149.13468641 606818.78 N 70.30422198 W 149.13468614 606817.86 N 70.30432319 W 149.13468927 • SurveyEditor Ver SP 2.1 Bld( doc40x_100) W-31\W-31\W-31A\W-31A Generated 10/23/2008 3:23 PM Page 5 of 5 WELLIiEAO=, McEVUY AGTUATCIR = _ ._ Hectrlc KB. EL't~/ = 24.31 BF. ELEV =~ 25.8 Knp - a~nc~ • W-31 A ~RLC GRAFT Max Angls = 125 Datum MO = 12039 Oats~m T1fD = 8800' SS 13-3I8"' CSG, 58#, L-841, IO - 12.415" 2693' 4-112"` QTIS X N1P ~~$$` ~/ Minimum lQ - 3.72x" @ 10779' 4-112" C3TIS XN NIPPLE / 7' TcIL 9659` 4112"' TBG, 12 6#„ 13-GR, .0152 bpf, IO = 3..958" (_..,."="' ~~ N 9-518" iiUhlpstock B4~U11 T©W 9809` 9723` 9-518" Bridge Plug 9824' _® Tubing Cut ~ 10$36' . PERFURATItIN SUMMARY REF LUG: A NGLE AT T4lF' F'ERF: 48 ~ 112143' Note: SSE SPF INTERVAL UpnlSgz OATS 2-1/2" 4 11210 - 11280 U 14101148 2-112" 4 11694 - 11' 705 U 10101 /0$ 2-112" 4 11717 - i 1727 U i 4!41148 2-1I2" 4 11836 - 11854 Cl 14101!48 2-1 l2" 4 11870 - 11$84 U 141/01108 2-112" 4 11890 - 11904 U 10101108 TOG 111947' I 4112" TBG, 12,6#. L-80, .4152 bpf, ID = 3.858„ sa~N4~TES "'"`4-112 4:FIR43MET`BG &LNR' 22U1' 4-112" X nipple 3.813" ID GAS LIFT MANDRELS ST Nil TVO OEII TYPE VLV LATCH PC3RT OATS 8 2474 2474 0.3 II~AG DlM' RK 0 09112!4.. 7 821E 3215 13,7 MMG IX3 RKP 16 1011 fll0 B 4791 4477 49 MMG Dtitll` Rft 0 4}9112111 5 5975 52447 50 Mtn SO RK 20 10110!(1 4 7433 6181 49 f~iAG DMY RI4 0 0911214 3 8597 7(339 49 Nfu1G DMY RK 0 09112{0 2 9549 7584 49 t~MtIG DGR RK 0 0911214 1 10605 8351 34 KBG2-1 ' DMY 43K 0 0911210 961' Syr~shony Gauge 111••641' 4-112"' C3TtS X NfP, ]O = 3.813.' '1{1714' '7" x 4-1 J2" S-3 PKF2 '~ Q7Q$` 4-112" QTIS X NIP, IO - 3.813'. 142773'. 4-112" QTIS XN NIP, ID = 3.725° 10934' 7", 26#, L-$0, $TCM1A, q.0383 bpf, 1D - 6.271 ( F'BTO 4112", 12'.6if, 13-CR, .01522 bpf, ]O = 3.958" I 11409' I~ MARKER JUINT T43P U~ 7° LNR I-I 10924' ~ s-5/8" GSG, 47#, L-so, ID - s.~s1 •' ~ l PBTO 1 7" LNR, 26#, L-80, .0383 bpf, IQ = 6.275'..'-j 119$(!' 11$86' -QIITER RUBBER GtIVER FF2ClM IBP ~ 10' X 314° SPANG JARS & WIRE BRUSH CIATE REV BY ' GOIV~+AENTS GATE REV BY ' C[7MMENTS PRUDHOE BAY UNIT 4111+4/$9 ' bR1G1NAL G4htPLETIQN V1fELL: W-31A Propased 14112214!8 7ES S1L~TRACKIW-31A) PERMff Na_ tbd 09149141 RNiTP GURRECTIC3NS AFl No: a4-029-21940-421 14106108 ' ITLH ' GURREGTiONS See. 21, T11 N, R12E 1d117fd8 ' f3TR1PJG GLV G1U (10110!08} E3P ~ptaraiian fAfaska2 SCHLUMBERGER Survey report Client .................... Field ..................... Well ...................... API number ................ Engineer .................. COUNTY :................... STATE:. ................... ----- Survey calculation m Method for positions.....: Method for DLS............ BP Exploration (Alaska) Inc. Prudhoe Bay W-31A 50-029-21900-01 W. Nicoll NSB AK ethods------------- Minimum curvature Mason & Taylor ----- Depth reference ----------------------- Permanent datum..........: Mean Sea Level Depth reference..........: Driller's Depth GL above permanent.......: 52.88 ft KB above permanent.......: N/A Topdrive DF above permanent.......: 80.48 ft ----- Vertical section origin---------------- Latitude (+N/S-).......... 0.00 ft Departure (+E/W-)........: 0.00 ft ----- Platform reference point--------------- Latitude (+N/S-).......... 0.00 ft Departure (+E/W-)........: 0.00 ft Azimuth from Vsect Origin to target: 345.00 degrees ~~ W 30-Sep-2008 12:26:09 Page 1 of 7 Spud date ................. 20-Sep-08 Last survey date.........: 27-Sep-08 Total accepted surveys...: 152 MD of first survey.......: 0.00 ft MD of last survey........: 12039.00 ft ----- Geomagnetic data ---------------------- Magnetic model...........: BGGM version 2008 Magnetic date ............: 18-Sep-2008 Magnetic field strength..: 1153.40 HCNT Magnetic dec (+E/W-).....: 22.85 degrees Magnetic dip.............. 80.87 degrees ----- MWD survey Reference Criteria --------- Reference G ............... 1002.00 meal Reference H ............... 1153.40 HCNT Reference Dip ............: 80.87 degrees Tolerance of G...........: (+/-) 2.50 meal Tolerance of H............ (+/-) 6.00 HCNT Tolerance of Dip.........: (+/-) 0.45 degrees ----- Corrections --------------------------- Magnetic dec (+E/W-).....: 22.85 degrees Grid convergence (+E/W-).: 0.00 degrees Total az corr (+E/W-)....: 22.85 degrees (Total az corr = magnetic dec - grid conv) Survey Correction Type .... I=Sag Corrected Inclination M=Schlumberger Magnetic Correction S=Shell Magnetic Correction F=Failed Axis Correction R=Magnetic Resonance Tool Correction D=Dmag Magnetic Correction L_J [(c)2008 IDEAL ID12_OC_13] SCHLLTMBERGER Survey Report 30 -Sep-2008 12:26:09 Page 2 of 7 Seq Measured Incl Azimuth Course _______- TVD Vertical Displ Displ Total At DLS Srvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type (deg) --- 1 -------- 0.00 ------ 0.02 ------- 224.00 ------ 0.00 -------- 0.00 -0.33 -0.46 -0.45 0.64 224.37 0.00 TIP None 2 189.58 0.37 224.00 189.58 189.58 -0.66 -0.92 -0.90 1.29 224.18 0.18 BP_ BOSS GYRO None 3 289.58 0.47 178.90 100.00 289.58 -1.22 -1.57 -1.11 1.92 215.43 0.34 BP_ BOSS GYRO None 4 389.58 0.62 141.50 100.00 389.57 -2.12 -2.40 -0.77 2.52 197.79 0.38 BP_ BOSS GYRO None 5 489.58 0.67 110.61 100.00 489.57 -2.96 -3.03 0.11 3.03 177.84 0.35 BP_ BOSS GYRO None 6 589.58 0.62 105.70 100.00 589.56 -3.57 -3.38 1.18 3.58 160.73 0.07 BP_ BOSS GYRO None 7 689.58 0.77 102.40 100.00 689.55 -4.16 -3.67 2.36 4.36 147.28 0.16 BP_ BOSS GYRO None 8 789.58 0.87 105.70 100.00 789.54 -4.85 -4.02 3.75 5.50 137.03 0.11 BP_ BOSS GYRO None 9 889.58 0.77 107.00 100.00 889.53 -5.60 -4.42 5.12 6.77 130.83 0.10 BP_ BOSS GYRO None • 10 989.58 0.60 113.00 100.00 989.52 -6.28 -4.82 6.24 7.89 127.69 0.18 BP_ BOSS GYRO None 11 1089.58 0.55 120.31 100.00 1089.52 -6.94 -5.27 7.14 8.88 126.44 0.09 BP_ BOSS GYRO None 12 1189.58 0.25 134.20 100.00 1189.52 -7.47 -5.67 7.71 9.57 126.31 0.31 BP_ BOSS GYRO None 13 1289.58 0.32 113.31 100.00 1289.52 -7.83 -5.93 8.12 10.06 126.12 0.12 BP_ BOSS GYRO None 14 1389.58 0.17 116.61 100.00 1389.51 -8.10 -6.11 8.51 10.48 125.65 0.15 BP_ BOSS GYRO None 15 1489.58 0.05 74.10 100.00 1489.51 -8.20 -6.16 8.69 10.65 125.34 0.14 BP_ BOSS GYRO None 16 1589.58 0.07 135.70 100.00 1589.51 -8.25 -6.19 8.77 10.74 125.21 0.06 BP_ BOSS GYRO None 17 1689.58 0.07 175.70 100.00 1689.51 -8.36 -6.30 8.82 10.84 125.52 0.05 BP_ BOSS GYRO None 18 1789.58 0.10 178.70 100.00 1789.51 -8.51 -6.44 8.83 10.93 126.13 0.03 BP_ BOSS GYRO None 19 1889.58 0.02 198.10 100.00 1889.51 -8.61 -6.55 8.82 10.99 126.58 0.08 BP_ BOSS GYRO None 20 1989.58 0.07 180.89 100.00 1989.51 -8.68 -6.63 8.82 11.03 126.93 0.05 BP_ BOSS GYRO None 21 2089.58 0.12 188.89 100.00 2089.51 -8.84 -6.79 8.80 11.12 127.66 0.05 BP_ BOSS GYRO None 22 58 2189 0.25 168.70 100.00 2189.51 -9.15 -7.11 8.83 11.33 128.85 0.14 BP_ BOSS GYRO None 23 . 2289.58 0.27 200.39 100.00 2289.51 -9.56 -7.54 8.79 11.58 130.64 0.14 BP_ BOSS GYRO None . 24 2389.58 0.27 227.50 100.00 2389.51 -9.86 -7.92 8.53 11.64 132.88 0.13 BP_ BOSS GYRO None 25 2489.58 0.32 237.30 100.00 2489.51 -10.05 -8.23 8.12 11.57 135.39 0.07 BP_ BOSS GYRO None 26 2589.58 0.27 241.69 100.00 2589.51 -10.19 -8.50 7.68 11.45 137.89 0.05 BP_ BOSS GYRO None 27 2689.58 0.40 237.39 100.00 2689.51 -10.35 -8.80 7.18 11.35 140.78 0.13 BP _BOSS GYRO None 28 2789.58 1.00 254.10 100.00 2789.50 -10.47 -9.22 6.05 11.03 146.76 0.63 BP _BOSS GYRO None 29 2889.58 3.15 272.90 100.00 2889.43 -9.64 -9.32 2.46 9.64 165.21 2.23 BP _BOSS GYRO None 30 2989.58 6.02 275.00 100.00 2989.10 -7.00 -8.73 -5.51 10.32 212.26 2.87 BP _BOSS GYRO None I [(c)2008 IDEAL ID12_OC_13] SCHLUMBERGER Survey Report 30-Sep-2008 12:26:09 Page 3 of 7 Seq Measured Incl Azimuth Course TVD Vertical Displ Displ Total At DLS Srvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type (deg) --- 31 -------- 3089.58 ------ 8.97 ---- 275.50 100.00 3088.23 -2.48 - 7.52 -18.49 19.97 247.87 2.95 BP_ BOSS GYRO None 32 3189.58 12.30 277.61 100.00 3186.50 4.35 -5.36 -36.82 37.21 261.71 3.35 BP_ BOSS GYRO None 33 3289.58 15.02 279.81 100.00 3283.66 13.88 -1.74 -60.15 60.17 268.34 2.77 BP_ BOSS GYRO None 34 3389.58 17.97 281.20 100.00 3379.54 26.13 3.46 -88.06 88.12 272.25 2.98 BP_ BOSS GYRO None 35 3489.58 20.92 281.81 100.00 3473.82 41.00 10.11 -120.67 121.09 274.79 2.96 BP_ BOSS GYRO None 36 3589.58 23.27 282.11 100.00 3566.47 58.06 17.91 -157.46 158.48 276.49 2.35 BP_ BOSS GYRO None 37 3689.58 26.10 281.61 100.00 3657.33 76.91 26.48 -198.33 200.09 277.61 2.84 BP_ BOSS GYRO None 38 3789.58 29.00 278.61 100.00 3745.98 96.48 34.54 -243.86 246.29 278.06 3.21 BP_ BOSS GYRO None 39 3889.58 31.97 276.11 100.00 3832.15 115.73 40.99 -294.16 297.01 277.93 3.23 BP_ BOSS GYRO None • 40 3989.58 35.02 275.61 100.00 3915.54 135.37 46.61 -349.05 352.15 277.61 3.06 BP_ BOSS GYRO None 41 4089.58 37.92 275.40 100.00 3995.94 156.18 52.31 -408.21 411.55 277.30 2.90 BP_ BOSS GYRO None 42 4189.58 41.28 275.31 100.00 4072.99 178.35 58.26 -471.67 475.25 277.04 3.36 BP_ BOSS GYRO None 43 4289.58 44.17 275.81 100.00 4146.44 202.18 64.84 -539.19 543.08 276.86 2.91 BP_ BOSS GYRO None 44 4389.58 47.37 276.20 100.00 4216.18 227.87 72.34 -610.44 614.71 276.76 3.21 BP_ BOSS GYRO None 45 4489.58 49.62 276.31 100.00 4282.45 255.02 80.50 -684.88 689.60 276.70 2.25 BP_ BOSS GYRO None 46 4589.58 49.62 276.31 100.00 4347.23 282.70 88.87 -760.60 765.77 276.66 0.00 BP_ BOSS GYRO None 47 4689.58 48.67 276.50 100.00 4412.65 310.31 97.31 -835.76 841.41 276.64 0.96 BP_ BOSS GYRO None 48 4789.58 48.77 276.31 100.00 4478.62 337.73 105.69 -910.44 916.55 276.62 0.17 BP_ BOSS GYRO None 49 4889.58 48.83 276.81 100.00 4544.49 365.38 114.29 -985.19 991.80 276.62 0.38 BP_ BOSS GYRO None 50 4989.58 49.17 277.00 100.00 4610.10 393.54 123.36 -1060.11 1067.27 276.64 0.37 BP_ BOSS GYRO None 51 5089.58 49.37 277.00 100.00 4675.35 421.93 132.60 -1135.33 1143.04 276.66 0.20 BP_ BOSS GYRO None 52 5189.58 49.42 277.31 100.00 4740.43 450.56 142.06 -1210.66 1218.96 276.69 0.24 BP_ BOSS GYRO None 53 5289.58 49.65 277.40 100.00 4805.33 479.49 151.79 -1286.11 1295.04 276.73 0.24 BP_ BOSS GYRO None • 54 5389.58 49.62 277.81 100.00 4870.10 508.78. 161.88 -1361.63 1371.22 276.78 0.31 BP_ BOSS GYRO None 55 5489.58 49.97 277.90 100.00 4934.65 538.44 172.32 -1437.29 1447.58 276.84 0.36 BP_ BOSS GYRO None 56 5589.58 50.15 278.00 100.00 4998.85 568.34 182.92 -1513.22 1524.24 276.89 0.20 BP_ BOSS GYRO None 57 5689.58 49.87 277.81 100.00 5063.11 598.16 193.46 -1589.11 1600.84 276.94 0.32 BP_ BOSS GYRO None 58 5789.58 50.02 278.00 100.00 5127.46 627.95 203.99 -1664.93 1677.38 276.99 0.21 BP_ BOSS GYRO None 59 5889.58 50.12 278.20 100.00 5191.65 658.04 214.79 -1740.85 1754.05 277.03 0.18 BP_ BOSS GYRO None 60 5989.58 50.50 278.31 100.00 5255.51 688.42 225.84 -1817.00 1830.98 277.09 0.39 BP_ BOSS GYRO None ~ [(c)2008 IDEAL ID12_OC_13] SCHLUMBERGER Survey Report 30-Sep-2008 12:26:09 Page 4 of 7 --- Seq -------- Measured ------ Incl ------- Azimuth ------ Course -------- TVD ------- Vertical Displ Displ Total At DLS Srvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type (deg) 61 6089.58 50 42 278.61 100.00 5319.17 719.12 237.18 -1893.28 1908.08 277.14 0.24 BP_ BOSS GYRO None 62 6189.58 50.45 278.70 100.00 5382.87 750.05 248.78 -1969.49 1985.14 277.20 0.08 BP_ BOSS GYRO None 63 6289.58 50.00 278.61 100.00 5446.85 780.89 260.35 -2045.47 2061.97 277.25 0.46 BP_ BOS5 GYRO None 64 6389.58 50.12 279.11 100.00 5511.04 811.90 272.16 -2121.23 2138.62 277.31 0.40 BP_ BOSS GYRO None 65 6489.58 50.07 279.40 100.00 5575.20 843.41 284.50 -2196.94 2215.28 277.38 0.23 BP_ BOSS GYRO None 66 6589.58 49.77 279.81 100.00 5639.58 875.27 297.26 -2272.38 2291.74 277.45 0.43 BP_ BOSS GYRO None 67 6689.58 49.77 280.20 100.00 5704.17 907.54 310.53 -2347.57 2368.01 277.54 0.30 BP_ BOSS GYRO None 68 6789.58 49.53 280.40 100.00 5768.91 940.11 324.15 -2422.55 2444.14 277.62 0.28 BP_ BOSS GYRO None 69 6889.58 50.12 280.20 100.00 5833.43 972.76 337.81 -2497.72 2520.46 277.70 0.61 BP_ BOSS GYRO • None 70 6989.58 50.22 279.90 100.00 5897.48 1005.28 351.22 -2573.34 2597.20 277.77 0.25 BP_ BOSS GYRO None 71 7089.58 50.42 279.70 100.00 5961.33 1037.56 364.32 -2649.18 2674.11 277.83 0.25 BP_ BOSS GYRO None 72 7189.58 50.12 279.61 100.00 6025.24 1069.64 377.21 -2725.00 2750.98 277.88 0.31 BP_ BOSS GYRO None 73 7289.58 50.17 279.70 100.00 6089.33 1101.67 390.09 -2800.68 2827.71 277.93 0.09 BP_ BOSS GYRO None 74 7389.58 49.67 280.20 100.00 6153.71 1133.94 403.31 -2876.04 2904.18 277.98 0.63 BP_ BOSS GYRO None 75 7489.58 49.02 280.70 100.00 6218.86 1166.54 417.07 -2950.64 2979.97 278.05 0.75 BP_ BOS5 GYRO None 76 7589.58 48.83 281.11 100.00 6284.57 1199.47 431.33 -3024.67 3055.27 278.12 0.36 BP_ BOSS GYRO None 77 7689.58 48.27 .281.40 100.00 6350.77 1232.63 445.96 -3098.18 3130.11 278.19 0.60 BP_ BOSS GYRO None 78 7789.58 47.92 281.70 100.00 6417.55 1265.90 460.86 -3171.10 3204.41 278.27 0.42 BP_ BOSS GYRO None 79 7889.58 47.02 282.00 100.00 6485.15 1299.18 475.99 -3243.22 3277.96 278.35 0.93 BP_ BOSS GYRO None 80 7989.58 46.67 282.00 100.00 6553.55 1332.30 491.16 -3314.58 3350.77 278.43 0.35 BP_ BOSS GYRO None 81 8089.58 46.27 282.70 100.00 6622.42 1365.60 506.66 -3385.40 3423.10 278.51 0.65 BP_ BOSS GYRO None 82 8189.58 45.72 283.11 100.00 6691.90 1399.27 522.72 -3455.51 3494.82 278.60 0.62 BP_ BOSS GYRO None 83 8289.58 45.27 283.70 100.00 6761.99 1433.19 539.26 -3524.89 3565.90 278.70 0.62 BP_ BOSS GYRO None • 84 8389.58 45.92 284.81 100.00 6831.97 1468.11 556.85 -3594.12 3637.00 278.81 1.03 BP_ BOSS GYRO None 85 8489.58 47.02 285.31 100.00 6900.84 1504.42 575.69 -3664.13 3709.08 278.93 1.16 BP_ BOSS GYRO None 86 8589.58 48.37 285.81 100.00 6968.14 1542.03 595.53 -3735.38 3782.55 279.06 1.40 BP_ BOSS GYRO None 87 8689.58 49.33 286.20 100.00 7033.95 1580.82 616.30 -3807.75 3857.31 279.19 1.00 BP _BOSS GYRO None 88 8789.58 50.37 286.90 100.00 7098.43 1620.81 638.07 -3881.02 3933.12 279.34 1.17 BP _BOSS GYRO None 89 8889.58 51.27 287.40 100.00 7161.60 1662.07 660.93 -3955.09 4009.93 279.49 0.98 BP _BOSS GYRO None 90 8989.58 50.72 287.11 100.00 7224.54 1703.54 683.98 -4029.30 4086.94 279.63 0.59 BP _BOSS GYRO None [(c)2008 IDEAL ID12_OC_13] SCHLiTMBERGER Survey Report 30 -Sep-2008 12:26:09 Page 5 of 7 --- Seq -------- Measured ------ Incl ------- Azimuth ------ Course -------- TVD ----- Vertical Displ Displ Total At DLS Srvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type (deg) 91 -------- 9089.58 ------ 50.37 ------- 287.00 ------ 100.00 ---- 7288.09 1744.52 706.63 -4103.12 4163.52 279.77 0.36 BP_ BOSS GYRO None 92 9189.58 49.92 286.70 100.00 7352.17 1785.03 728.88 -4176.59 4239.71 279.90 0.51 BP_ BOSS GYRO None 93 9289.58 49.62 286.90 100.00 7416.76 1825.26 750.95 -4249.67 4315.51 280.02 0.34 BP_ BOSS GYRO None 94 9389.58 49.92 287.31 100.00 7481.34 1865.83 773.40 -4322.64 4391.29 280.14 0.43 BP_ BOSS GYRO None 95 9489.58 49.87 288.00 100.00 7545.76 1907.10 796.60 -4395.53 4467.13 280.27 0.53 BP_ BOSS GYRO None 96 9589.58 50.22 288.40 100.00 7609.98 1949.08 820.54 -4468.35 4543.06 280.41 0.47 BP_ BOSS GYRO None 97 9689.58 50.12 289.11 100.00 7674.03 1991.75 845.23 -4541.06 4619.05 280.54 0.55 BP_ BOSS GYRO None 98 9789.58 50.52 289.81 100.00 7737.88 2035.30 870.87 -4613.63 4695.10 280.69 0.67 BP_ BOSS GYRO None 99 9792.00 50.49 289.75 2.42 7739.42 2036.36 871.50 -4615.38 4696.94 280.69 2.28 BP_ BOSS GYRO None • 100 9809.00 52.35 290.85 17.00 7750.02 2044.04 876.12 -4627.85 4710.05 280.72 12.05 BP_ BLIND None 101 9823.55 51.14 290.85 14.55 7759.03 2050.73 880.18 -4638.52 4721.29 280.74 8.32 BP _INC+TREND None 102 9919.86 47.49 296.40 96.31 7821.83 2096.20 909.34 -4705.41 4792.48 280.94 5.78 BP _INC+TREND None 103 10014.73 41.30 295.73 94.87 7889.59 2139.80 938.50 -4765.00 4856.54 281.14 6.54 BP _MWD+IFR+MS None 104 10110.66 36.97 302.14 95.93 7964.01 2181.64 967.62 -4817.99 4914.19 281.36 6.17 BP _MWD+IFR+MS None 105 10206.57 31.44 312.81 95.91 8043.37 2224.02 1000.01 -4860.83 4962.63 281.63 8.49 BP _MWD+IFR+MS None 106 10301.82 27.92 323.34 95.25 8126.17 2265.81 1034.82 -4892.40 5000.64 281.94 6.59 BP _MWD+IFR+MS None 107 10398.07 28.44 333.87 96.25 8211.06 2309.27 1073.50 -4915.96 5031.81 282.32 5.19 BP _MWD+IFR+MS None 108 10447.91 28.11 336.45 49.84 8254.96 2332.52 1094.92 -4925.88 5046.10 282.53 2.54 BP _MWD+IFR+MS None 109 10492.70 29.10 345.10 44.79 8294.30 2353.86 1115.12 -4932.90 5057.37 282.74 9.50 BP _MWD+IFR+MS None 110 10541.64 28.98 350.84 48.94 8337.09 2377.56 1138.33 -4937.85 5067.36 282.98 5.70 BP _MWD+IFR+MS None 111 10589.12 30.04 357.36 47.48 8378.42 2400.62 1161.57 -4940.23 5074.95 283.23 7.12 BP _MWD+IFR+MS None 112 10637 51 30 06 0.46 48.39 8420.31 2424.13 1185.79 -4940.69 5080.99 283.50 3.21 BP _MWD+IFR+MS None 113 . 10684.46 . 29.01 0.72 46.95 8461.16 2446.42 1208.93 -4940.45 5086.21 283.75 2.25 BP _MWD+IFR+MS None • 114 10735.10 27.73 359.73 50.64 8505.72 2469.64 1232.99 -4940.35 5091.89 284.01 2.69 BP _MWD+IFR+MS None 115 10780.78 29.98 1.73 45.68 8545.72 2490.85 1255.03 -4940.06 5096.99 284.25 5.36 BP _MWD+IFR+MS None 116 10828.87 29.00 0.20 48.09 8587.58 2513.61 1278.70 -4939.66 5102.48 284.51 2.57 BP _MWD+IFR+MS None 117 10867.45 28.44 0.01 38.58 8621.42 2531.50 1297.24 -4939.62 5107.12 284.71 1.47 BP _MWD+IFR+MS None 118 10874.56 28.10 359.64 7.11 8627.68 2534.76 1300.60 -4939.63 5107.99 284.75 5.38 BP _MWD+IFR+MS None 119 10929.01 27.62 359.63 54.45 8675.82 2559.38 1326.05 -4939.79 5114.68 285.03 0.88 BP _INC+TREND None 120 10962.24 27.35 359.62 33.23 8705.30 2574.22 1341.38 -4939.89 5118.78 285.19 0.81 BP _MWD+IFR+MS None [(c)2008 IDEAL ID12_OC_13] SCHLUNNIBERGER Survey Report 30-Sep-2008 12:26:09 Page 6 of 7 --- Seq -------- Measured ------ Incl ------- Azimuth ------ Course -------- TVD ------ Vertical Displ Displ Total At DLS Srvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type (deg) 121 10994.02 30.62 359.82 31.78 8733.09 2589.11 1356.78 -4939.97 5122.90 285.36 10.29 BP_ MWD+IFR+MS None 122 11025.89 32.14 1.85 31.87 8760.30 2605.07 1373.37 -4939.72 5127.08 285.54 5.81 BP_ MWD+IFR+MS None 123 11058.11 34.09 0.05 32.22 8787.29 2622.00 1390.97 -4939.44 5131.55 285.73 6.78 BP_ MWD+IFR+MS None 124 11101.61 40.70 358.51 43.50 8821.83 2647.59 1417.37 -4939.79 5139.11 286.01 15.35 BP_ MWD+IFR+MS None 125 11153.37 48.44 358.43 51.76 8858.67 2682.89 1453.65 -4940.76 5150.17 286.39 14.95 BP_ MWD+IFR+MS None 126 11185.54 48.00 358.00 32.17 8880.11 2706.24 1477.63 -4941.51 5157.71 286.65 1.69 BP_ MWD+IFR+MS None 127 11216.96 48.13 359.74 31.42 8901.11 2728.93 1501.00 -4941.97 5164.89 286.89 4.14 BP_ MWD+IFR+MS None 128 11248.70 47.71 358.94 31.74 8922.38 2751.75 1524.55 -4942.24 5172.04 287.14 2.29 BP_ MWD+IFR+MS None • 129 11281.41 52.63 359.52 32.71 8943.32 2776.09 1549.66 -4942.58 5179.82 287.41 15.10 BP_ MWD+IFR+MS None 130 11312.12 57.97 357.37 30.71 8960.80 2800.64 1574.89 -4943.28 5188.09 287.67 18.31 BP_ MWD+IFR+MS None 131 11345.70 59.99 0.18 33.58 8978.11 2828.58 1603.65 -4943.88 5197.47 287.97 9.36 BP_ MWD+IFR+MS None 132 11378.09 63.54 0.21 32.39 8993.43 2856.12 1632.18 -4943.79 5206.25 288.27 10.96 BP_ MWD+IFR+MS None 133 11408.94 65.26 0.71 30.85 9006.76 2882.93 1660.00 -4943.56 5214.83 288.56 5.76 BP_ MWD+IFR+MS None 134 11440.99 70.47 359.78 32.05 9018.83 2911.57 1689.68 -4943.44 5224.23 288.87 16.48 BP_ MWD+IFR+MS None 135 11472.82 76.51 359.21 31.83 9027.87 2941.10 1720.18 -4943.71 5234.43 289.19 19.05 BP_ MWD+IFR+MS None 136 11504.78 82.55 358.11 31.96 9033.68 2971.62 1751.59 -4944.45 5245.53 289.51 19.20 BP_ MWD+IFR+MS None 137 11536.62 88.85 357.83 31.84 9036.06 3002.55 1783.30 -4945.57 5257.27 289.83 19.81 BP_ MWD+IFR+MS None 138 11569.29 94.78 359.63 32.67 9035.03 3034.25 1815.93 -4946.30 5269.10 290.16 18.97 BP_ MWD+IFR+MS None 139 11602.33 97.50 0.33 33.04 9031.49 3065.99 1848.78 -4946.31 5280.53 290.49 8.50 BP_ MWD+IFR+MS None 140 11633.17 103.06 1.28 30.84 9025.99 3095.17 1879.11 -4945.88 5290.82 290.80 18.28 BP_ MWD+IFR+MS None 141 11664.49 109.20 2.24 31.32 9017.29 3123.97 1909.17 -4944.96 5300.72 291.11 19.82 BP_ MWD+IFR+MS None 142 11696.48 112.42 2.27 31.99 9005.93 3152.52 1939.04 -4943.79 5310.46 291.42 10.07 BP _MWD+IFR+MS None • 143 11727.86 118.18 1.87 31.38 8992.53 3179.63 1967.38 -4942.76 5319.91 291.70 18.39 BP _MWD+IFR+MS None 144 11759.81 119.46 1.42 31.95 8977.13 3206.45 1995.36 -4941.96 5329.58 291.99 4.19 BP _MWD+IFR+MS None 145 11791.97 120.32 0.31 32.16 8961.10 3233.27 2023.24 -4941.54 5339.69 292.27 4.01 BP _MWD+IFR+MS None 146 11823.58 126.49 2.18 31.61 8943.70 3258.59 2049.61 -4940.98 5349.22 292.53 20.13 BP _MWD+IFR+MS None 147 11855.74 126.94 2.28 32.16 8924.48 3283.21 2075.37 -4939.98 5358.22 292.79 1.42 BP _MWD+IFR+MS None 148 11887.41 127.03 0.04 31.67 8905.42 3307.51 2100.66 -4939.46 5367.59 293.04 5.66 BP _MWD+IFR+MS None 149 11918.96 127.54 1.18 31.55 8886.31 3331.69 2125.76 -4939.20 5377.22 293.29 3.30 BP _MWD+IFR+MS None 150 11951.06 127.98 0.75 32.10 8866.65 3356.08 2151.13 -4938.77 5386.91 293.54 1.73 BP _MWD+IFR+MS None [(c)2008 IDEAL ID12_OC_13] SCHLUMBERGER Survey Report Seq Measured Incl Azimuth Course # depth angle angle length - (ft) (deg) (deg) (ft) --- -------- ------ ------- --- 151 11991.79 128.30 359.44 40.73 152 12039.00 128.30 359.44 47.21 [(c)2008 IDEAL ID12_OC_13] TVD depth (ft) 8841.50 8812.24 30-Sep-2008 Vertical section (ft) 3387.01 3422.89 12:26:09 Displ Displ +N/S- +E/W- (ft) (ft) 2183.17 -4938.71 2220.21 -4939.08 Page Total displ (ft) 5399.73 5415.15 7 of 7 ------- ----- ----- ------ At DLS Srvy Tool Azim (deg/ tool Corr (deg) 100f) type (deg) ------- ----- ----- ------ 293.85 2.65 BP_MWD+IFR+MS None 294.20 0.00 Project to TD None • i Schlumberger Drilling & Measurements MWD/LWD Log Product Delivery Customer Well No Installation/Rig BP Exploration (Alaska) Inc. W-31 A Nabors-7ES Dispatched To: Date Dispatched: Dispatched By: Christine Mahnken 1-Oct-08 Paul Wyman Data No Of Prints No of Floppies Surveys 2 1 Received By: Please sign and return to: Drilling & Measurements LWD Division t~ ~~ ~ 2525 Gambell Street, Suite 400 Anchorage, Alaska 99501 fclarke3C~3slb.com Fax:907-561-8317 LWD Log Uellvery VZ.1, 03-Oti-Oti ©S-I~~ ~ • ~;... ~ ~ d SARAN PAL/N, GOVERNOR t~i~t1'7~1 oi~ tusy ~ 333 W. 7th AVENUE, SUITE 100 Co1~T5ERVA'JCIOI~T CornrII55IO~ ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Robert Tirpack Engineering Team Leader BP Exploration Alaska Inc. PO Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU W-31A BP Exploration Alaska Inc. Permit No: 208-136 Surface Location: 770' FNL, 1443' FEL, SEC. 21, T 11 N, R 12E, UM Bottomhole Location: 1148' FSL, 1090' FEL, SEC. 17, T11N, R12E, UM Dear Mr. Tirpack: Enclosed is the approved application for permit to redrill the above referenced development well. 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. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). incerely, Dance T. Seamount, Jr. ~ 1 Chair DATED this2 ~ day of August, 2008 cc: Department of Fish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/o encl. STATE OF ALASKA '''~9 ALASl~IL AND GAS CONSERVATION COM I~~~ AUG 2 5 2008 PERMIT TO DRILL laska Qil ~ Gas Cons. Commission 20 AAC 25.005 ~~ ~ AnrhrSraae 1 a. Type of work ^ Drill ®Redrill ^ Re-Entry 1 b. Current Well Class ^ Exploratory ^ Development Gas ^ Service ^ Multiple Zone ^ Stratigraphic Test ®Development Oil ^ Single Zone 1 c. Specify if well is proposed for: ^ Coalbed Methane ^ Gas Hydrates ^ Shale Gas 2. Operator Name: BP Exploration (Alaska) Inc. 5. Bond: ®Blanket ^ Single Well Bond No. 6194193 11. Well Name and Number: PBU W-31A 3. Address: P.O. Box 196612, Anchorage, Alaska 99519-6612 6. Proposed Depth: MD 12027' TVD 8812' 12. Field /Pool(s): Prudhoe Bay Field / Prudhoe Bay 4a. Location of Well (Governmental Section): Surface: 14 ' FEL SEC T11N R12E UM 0' FN 2 7. Property Designation: ADL 028262 Pool , , 77 L, 43 , . 1, Top of Productive Horizon: 565' FSL, 1095' FEL, SEC. 17, T11N, R12E, UM 8. Land Use Permit: 13. Approximate Spud Date: October 10, 2008 Total Depth: 1448' FSL, 1090' FEL, SEC. 17, T11 N, R12E, UM 9. Acres in Property: 2560 14. Distance to Nearest Property: 14,500' 4b. Location of Well (State Base Plane Coordinates): Surface: x-611789 y- 5959483 Zone-ASP4 10. KB Elevation Plan (Height above GL): 81.6 feet 15. Distance to Nearest Well Within Pool: 1365' 16. Deviated Wells: Kickoff Depth: gg20 feet Maximum Hole An le: 126 de rees 17. Maximum Anticipated Pressures in psig (see 20 AAC 25.035) Downhole: 3750 Surface: 2892 18. Casin Pro ram: S ecificatio ns T - Se ~n De th -Bo ttom Quanti of C ment c.f. or sa s Hole Casin Wei ht Grade Cou lin Len th MD TVD MD TVD includin sta a data 8-1/2" 7" 26# L-80 BTC-M 1278' 9640' 7620' 10918' 8661' 292 cu ft Class'G' 6-1/8" 4-1/2" 12.6# 13Cr Vam To 1259' 10768' 8386' 12027' 8812' 185 cu ft Class'G' 19, PRESENT WELL CONDITION SUMMARY (To be completed for Redrill and Re-entry Operations) Total Depth MD (ft): 11980' Total Depth TVD (ft): 9300' Plugs (measured): 10935' Effective Depth MD (ft): 11938' Effective Depth TVD (ft): 9263' Junk (measured): 11886' Casing Length ` Size - CemenYVolume° MD TVD Conductor/Structural 110' 20" 11 110' Surface 2699' 13-3/8" 3840 cu ft Coldset III and CS II 2699' 2699' Intermediate 11185' 9-5/8" 2421 cu ft Class'G' 11185' 8655' Producti n Liner 1056' 7" 362 cu ft Class 'G' 10924' - 11980' 8471' - 9300' Perforation Depth MD (ft): Below Plug: 11546' - 11730' Perforation Depth TVD (ft): 8933' - 9086' 20. Attachments ^ Filing Fee, $100 ^ BOP Sketch ®Drilling Program ^ Time vs Depth Plot. ^ Shallow Hazard Analysis ^ Property Plat ^ Diverter Sketch ^ Seabed Report ^ Drilling Fluid Program ®20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the foregoing is true and correct. Contact Garret Staudinger, 564-4242 Printed Name Robert Tirpack Title Engineering Team Leader Prepared By Name/Number: Si nature Phone 564-4166 Date ~-~l Terrie Hubble, 564-4628 Commission Use Ont Permit To Drill Number: ~~/~ API Number: 50-029-21900-01-00 Permit Approval See cover letter for Date: 9' other re uirements Conditions of Approval: If box is checked, well may not be used to explore for, test, or produce coalbed me~th/ane, gas hydrates, or gas contained shales: `~ ^ > Samples Req'd: ^ Yes 1~ No Mud Log Req'd: ^ Yes ~No ~~ QS ~ v V C "~F:~~ G~ ~~ H2S Measures: [Yes ^ No Directional Survey Req'd: Yes ^ No Other: APPROVED BY THE COMMISSION vv ~ ; ~, :; ~~, a ,COMMISSIONER Form 10-401 Revised 12A~O,p`~``~ ~ ~ ~ ~ ~ L ~ Submit In Duplicate • Well Name: W-31 A De-complete, Drill, and Complete Plan Summary T e of Well service / roducer / in'ector : Producer Tar et X Y Z TVDss Townshi Ran a Section FSL FEL Surface As-Built 611789 5959483 0 11 N 12E 21 4509 1443 Tar et Start: TSGR 606835 5960746 8580 11 N 12E 17 565 1095 BHL 606824 5961629 8730 11N 12E 17 1448 1090 AFE Number: N/A API Number: 50-029-21900-xx Estimated Start Date: October 10, 2008 O eratin da s: 27 Ri Nabors 7ES TMD 12,027' TVD rkb: 8,811' RKB/GL 28.5'/53.1' RTE 81.6' Well Design: Horizontal Sidetrack Producer 4-~/z", Cr-13 monobore com letion Planned Status: Proposed Sidetrack from existin producer W-31 General Well Information: Estimated BHP: 3650 psi (7.9 pp EMW) at 8945' TVD Estimated BHT: 232 deg F at 8945' TVD W-31 Well History and Information: Current Well Status: There have been no prior RWOs or sidetracks on W-31. In January 2008, a CMIT TxIA failed when tested to 3500 psi. A LLR of 2 bpm 03100 psi was established. A leak detection log is scheduled for pre-sidetrack screening to determine the location of the leak. Proposed Sidetrack: The W-31 wellbore will be plugged and abandoned from 10,947' to TD w/cement. In order to conduct this planned sidetrack, the existing 4-1/2" L-80 tubing will be cut at 10,850', pulled, and a 9- 5/8" bridge plug will be set around 9,810'. A whipstock will be set on top of the bridge plug and used to kick off the 8-1/2" intermediate hole section drilling BHA. After the intermediate hole section is drilled down to the top of the Sag River (10,918'), it will be cased with 7" drilling liner and cemented to 9,640'. The 6-1/8" horizontal production hole will be drilled to TD (12,027') in Zone 4 before being cased with 4-1/2" 13-Cr, cemented, and perforated (300' minimum). The well will be completed with a 4-1/2" 13CR Production string. Existing Well Information: Well Name: API Number: TD: Well Type: Current Status: BHP: BHT: W-31 50-029-21900-00 11,980' MD Producer Shut in 3650 psi @ 8945' TVDss 232° F C~ 8945' TVDss Current Mechanical Condition: W-31A Permit to Drill Page 1 • Tubing: Maximum Angle: Max Dogleg of interest: Tubing. Spool: Tubing. Hanger: Tubing. Head Adapter: Tree: BPV Profile: Perforations: Tubing Fluids: Annulus Fluids Formation Markers: 4.5", 12.6#, L-80. See current schematic for jewelry. 52° at 10100' MD 3.4°/100' at 3400' MD McEvoy 13-5/8" 5M McEvoy Tubing Hanger - No pup; made up to full joint of 4-1 /2" tbg McEvoy 13-5/8" 5M x 13-3/8" NSCC FMC 4-1/16" 5M 4" Type H 3-3/8", 4 spf @ 11546'-11566', 11571'-11576' (6 spf), 11652'-11682', 11694'-11706', 11716'-11730' Wellbore displaced to crude with 200' diesel FP (AWGRS 1/1/08, 1/5/08) Wellbore displaced to crude with 200' diesel FP (AWGRS 1/1/08, 1/5/08) Est. Formation Tops Est. Formation Tops Uncertainty Commercial Hydrocarbon Bearing Est. Pore Press. Est. Pore Press. Formation MD (TVDss) (feet) (Yes/No) (Psi) (ppg EMW TKLB 6699 TKA4 6705 TKB_LCU 6705 TM LV 6720 TKNG 7388 TJG 7401 TJF 9791 7657 KOP 9819 7675 TJE 10110 7880 TJD 10364 8090 TJC 10602 8300 TJB 10743 8425 TJA 10817 8490 TSGR 10918 8580 +/-10 Gas 3750 8.4 TSHU 10952 8610 ~ +/-10 No 3731 8.3 TSHB 8665 +/-10 No 3712 8.2 TEIL 11074 8718 +/-10 No 3703 8.2 TSAD 11104 8743 +/-10 Gas 3581 7.9 45N 8776 +/-10 Gas 3592 7.9 45P 11153 8782 +/-10 Oil 3594 7.9 44N 8798 +/-10 Oil 3600 7.9 44P 11182 8803 +/-10 Oil 3602 7.9 43N 8845 +/-10 Oil 3616 7.9 43P 11241 8847 +/-10 Oil 3617 7.9 42N 8861 +/-10 Oil 3622 7.9 42P 11274 8864 +/-10 Oil 3623 7.9 41 N 8885 +/-10 Swept 3630 7.9 41 P 11347 8897 +/-10 Swept . 3635 7.9 31N 8934 +/-10 Wet 3648 7.9 31P 11455 8937 +/-10 Wet 3649 7.9 W-31A Permit to Drill Page 2 Existing Casing/Tubing Program KBE = 90.88', BFE = 54.68' Hole Size Csg/ Tbg O.D. Wt/Ft Grade Connection Length (ft) Top MD/TVD RTE ft Btm MD/TVD RTE ft 42" 20" 110 GL 146/146 17-1/2" 13-3/8" 68 N-80 BTC 2663 GL 2699/2699 12-1/4" 9-5/8" 47 L-80 NSCC 11149 GL 1 1 1 85/8666 8-1 /2" 7" 26 L-80 TC4S 1056 10924/8455 11980/9317 Tubin 4-1/2" 12.6 L-80 BTC 10911 GL 10947/8455 *Reviewed Existing Tallies New Casing/Tubing Program KBE = 81.6', GLE = 53.1' Hole Size Csg/ Tbg O.D. WtlFt Grade Connection Length (ft) Top MD/TVD RTE ft Btm MDlTVD RTE ft Existin Casin from W-31 42" 20" 110 GL 146/146 17-1/2" 13-3/8" 68 N-80 BTC 2663 GL 2699/2699 12-1/4" 9-5/8" 47 L-80 NSCC 9763.5 GL 9792/7750 Planned New Casin and tubin for W-31 A 8-1/2" 7" 26 L-80 BTC-M 1278 9640/7620 10918/8661 6-1/8" 4-1/2" 12.6 13-CR Vam To 1259 10768/8386 12027/8811 Tubin 4-1/2" 12.6 13-DR Vam To 10739.5 GL 10768/8386 Directional• Directional Plan: Schlumber er A roved 8/12/08 P12 Ref Elev: 81.6' MD KOP: 9820' MD, be in 6/100 build Close A roach Wells: W-34A, 1286' ctr-ctr distance at 10,562' MD Surve Pro ram: See Anticollision Re ort for details Maximum Hole An le: 125.8 de rees Distance to Nearest Pro ert Line: 14,500' from PBU bounda Distance to Nearest Well in Pool: 1365' from W-34A, 800' from W-31 motherbore Mud Program: 8-1/2" Intermediate Hole Mud Pro erties Freshwater Mud (LSND) Interval Densit PV YP PH API Filtrate MBT 9820'-10918' TSGR 11.2 14-22 18-24 9.0-9.5 HTHP < 10 < 20 6-1/8" Production Hole Mud Pro erties FloPro SF Interval Densit PV YP PH HTHPC~235 LG Solids 10918'-12027' 8.6 5-8 22-32 8.5-9.0 < 8 < 3 Survev and Logging Program: 8-1/2" Hole Section: Sample as required by well site Geologist MWD /LWD: GR/RES real time O en Hole: None Cased Hole: USIT in primary depth control mode 6-1/8" Hole Section: Sample as required by well site Geologist MWD /LWD: GR/RES real time and Azi-Dens/Neu realtime for first half of prod section only O en Hole: None Cased Hole: SCMT if required W-31A Permit to Drill Page 3 • Cement Calculations: Casin Size Intermediate Casin - 7" 26 Ib/ft L-80 BTC-M -Sin le Stage Basis Lead: None Tail: Open hole volume + 30% excess + 80' shoe track + 150' of 9-5/8" x 7" liner lap + 200' DP x 9-5/8" annulus. TOC at to of 7" liner. Fluid Sequence and This cement job is planned for one stage. Volume: 1" Sta e Wash None S acer 40 bbl of MUDPUSH XL Lead none Tail 52 bbl (244 sks) 15.8 pp emp I BHST = 230° to 11.7 Class Gcement - 1.16 cuft/sk Casin Size Production Liner - 4-1 /2" 12.6 Ib/ft 13-CR Vam Top -Sin le Sta e Basis Lead: None Tail: Open hole volume + 30% excess + 80' shoe track + 150' of 4-1 /2" x 7" liner lap + 200' DP x 7" annulus. TOC at to of 4.5" liner. Fluid Sequence and This cement job is planned for one stage. Volume: 1 " Sta e Wash None 3 acer 25 bbl of MUDPUSH II Lead none Tail 33 bbl (154 sks) 15.8 G to 10 cement + Silica + Latex - 1.16 cuft/sk Temo I BHST = 232° F from SOR Surface and Anti-Collision Issues: • Surface Shut-in Wells: The closest existing surface wells are W-32 (15' away), W-30 (15' away), W-33 (30' away), and W-29 (30' away). The well houses must be removed from those wells. • Close Approach Shut-in Wells: W-34 does not pass the Anticollision Scan. A Tolerable Collision Risk Worksheet has been completed, and the Anticollision Scan has been re-run using a 1 in 50 collision risk. No wells will require subsurface shut-in during drilling operations. Reference the Anti-collision report in the directional plan for a full list of offset well paths. Contacts Drilling Engineer Geologist Pad Engineer Name Phone # Garret Staudinger 564-4242 Jennifer Flight 564-4144 Dan Robertson 564-5546 W-31A Permit to Drill Page 4 • Well Control The production hole section 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. BOP equipment will be tested to 3,500 psi. The test frequency during the decomplete will be on a 7 day period, and 14 days during the D&C operations. Anticipated surface pressures will not exceed 3,000psi, therefore it will not be necessary to have two sets of pipe rams installed at all times. Diverter, BOPE and drilling fluid system schematics on file with the AOGCC. Other Requests: 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 requests a variance to the provisions of 20 AAC 25.285 (f) (1) regarding the initial testing of the BOPE when existing wellhead or testing equipment prevents the testing of the lowest set of pipe rams. If the lower set of pipe rams cannot be tested during the primary BOP test, that 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 BOP stack. Intermediate Section Kick Tolerance and Integrity Testin • BOPE: Hydril, 13-5/8", 5000 psi • Maximum anticipated BHP: 3750 psi (8.4 ppg EMW) at 8580' TVD • Maximum surface pressure: 2,892 psi -Based on a full column of gas C 0.10 psi/ft • Planned BOP test pressure: 3,500 psi/250 psi Rams and 2,500 psi/250 psi Annular • 7" Casing Test: 3,500 psi surface pressure test • Integrity Test -8-1/2" hole: LOT 20' - 50' in open hole from the window (9790' MD) • Kick Tolerance: Infinite KT with a 11.2 ppg mud and a 12.5 ppg LOT Production Section Kick Tolerance and Intearity Testin • BOPE: Hydril, 13-5/8", 5000 psi • Maximum anticipated BHP: 3731 psi (8.3 ppg EMW) at 8610' TVD • Maximum surface pressure: 2,870 psi -Based on a full column of gas Q 0.10 psi/ft • Planned BOP test pressure: 3,500 psi/250 psi Rams and 2,500 psi/250 psi Annular • 4-1/2" Liner Test: 3,500 psi surface pressure test • Integrity Test - 6-1/8" hole: FIT 20' - 50' in open hole from the 7" csg shoe (10918' MD) • Kick Tolerance: Infinite KT with a 8.6 ppg mud and a 11.0 ppg FIT • Planned completion fluid: Estimated 9.0 ppg Brine / 6.8 ppg Diesel Disposal • No annular disposal in this well. • Cuttings Handling: Cuttings generated from drilling operations will be hauled to grind and inject at DS-04. • Fluid Handling: Haul all drilling and completion fluids and other Class II wastes to DS-04 for disposal. Haul all Class I wastes to Pad 3 for disposal. W-31 A Permit to Drill Page 5 s Drilling Hazards and Contingencies POST THIS NOTICE IN THE DOGHOUSE I. Kingak Instability: The kick-off point is in the Kingak TJF. Inclination will be dropped from 50 degrees to 28 degrees through the Kingak to the Sag River. Lower hole angle should help with instability. Match mud weight to azimuth and inclination of Kingak penetration. II. Tubing Parting while pulling from well: The risk of failure to fish the parted tubing in one pull is relatively low. The tubing is not severely corroded according to the caliper log. III. Swab and Surge: Drilling will be done pazallel to a Kingak fault neaz the KOP. Watch swab and surge, follow RP for drilling Kingak. The pazent well W-31 did not have any mention of losses /drilling difficulty in the Kingak. IV. Kick Tolerance /Integrity Testing: Intermediate Section Kick Tolerance and Integrity Testing • Integrity Test - 8-1/2" hole: LOT 20' - 50' from 9 5/g" window • Kick Tolerance: Calculated an Infinite KT with a 11.2 ppg mud and a 12.5 ppg LOT Production Section Kick Tolerance and Integrity Testing • Integrity Test - 6-'/R" hole: FIT 20' - 50' from 7" shoe • Kick Tolerance: Calculated an Infinite KT with a 8.6 ppg mud with 11.0 ppg FIT V. Lost Circulation: TD will be in the Shublik which might increase the risk of losses. Follow the recommended drilling practices in the Shublik, and the lost circulation decision tree. VI. Hydrogen Sulfide: W Pad is not designated as an HZS site, however Standazd Operating Procedures for HZS precautions should be followed at all times. H2S levels across the pad aze typically in the 10-20 ppm range based on the latest samples taken. The W-31 H2S reading on 11/4/06 was 10 ppm. VII. Anti-Collision: There is a minor risk with anti-collision to W-34A. A tolerable risk collision worksheet has been completed and Anti- collision passes the 1 in 50 risk scan. VIII.Faults: No fault crossings aze anticipated. IX. Flash Points: - Dead Crude = < 40 deg F - Methanol (neat) = 52 deg F - Diesel = 100 deg F CONSULT THE W PAD DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION W-31A Permit to Drill Page 6 W-31 A - De-complete, Drill, and Complete Procedure Summary Pre-Rig Operations: 1. RU a-line and run LDL to determine leak location (Done 6/16/08). 2. GLV stations #2-5 have all been replaced with dummy valves. GLV station #1 is currently open (AWGRS 12/25/07). The well is currently fluid packed with dead crude and diesel (AWGRS 1/5/08). 3. Replace open pocket of gas lift valve #1 with dummy valve and ensure IA is fluid packed for CT P&A. 4. RU slick line and pull the XXN plug (installed 12/25/07) from the XN-nipple at 10935'. 5. RU CT and P&A W-31. RIH with CT and tag PBTD. Lay in 31 bbls of 15.8 ppg G cement and perform squeeze. Calculations: PBTD at 11622' MD (fill in liner to this depth, AWGRS 2/8/07), TOC at 10947', 7" Capacity 0.0383bpf = 26 bbls + 5 bbls excess 6. PT cement plug to 3500 psi after 1500 psi compressive strength is achieved. 7. RU a-line and RIH with the appropriate jet cutter for 4-1/2" tbg, Cut the tbg at 10,850'. 8. Displace the well to clean seawater by circulating down the tubing through the tubing cut. Continue to circulate until clean seawater returns to surface. Freeze protect to --2,200' MD with diesel. 9. Test the 9 5/8" pack-off and tubing hanger seals to 5,000 psi for 30 minutes (completed 1/3/08). Function all lock down screws (completed 1 /3/08). 10. MIT-OA failed to 1000 psi on 1/4/08. 11. Bleed casing and annulus pressures to zero. 12. Set a BPV. Secure the well. Level the pad as necessary. Rig Operations: 1. MIRU Nabors 7ES. 2. Pull BPV. Circulate out diesel freeze protection and displace the well to seawater. Set TWC. PT TWC from above and below. 3. Nipple down tree (the tested mechanical barriers will be a cement plug and TWC). Nipple up and test ROPE to 250 psi low / 3,500 psi high. 4. R/U. Pull 4'/z" tubing from the cut at 10,850' MD. 5. R/U E-line. M/U 8.5" gauge ring /junk basket / CCL. RIH and tag tubing stump. POOH. 6. Run SLB USIT from tubing stump to surface. 7. RIH with HES EZSV on E-line. Set bridge plug at 9810', as required to avoid cutting a casing collar while milling the window. POH. R/D E-line. 8. Pressure-test the 9-5/8" casing to 3,500psi for 30 minutes. Record test. 9. P/U and RIH with 9-5/8" Baker bottom-trip anchor whip stock assembly on 4" DP. Orient whipstock, as desired, and set on bridge plug. Shear off of whipstock. 10. Displace the well to 11.2 ppg LSND based milling fluid. Completely displace the well prior to beginning milling operations. 11. Mill window in 9-5/8" casing at ± 9791' MD, plus approximately 20' beyond middle of window. Circulate well bore clean. 12. Pull up into 9 5/8" casing and conduct a LOT. POOH. 13. M/U 8-'/z" Dir/GR/RES assembly. RIH, kick off and drill the 8'h" intermediate section with 11.2 ppg LSND. 14. Drill ahead to the 7" liner point at top of the Sag River, as per the directional plan. Circulate well clean, short trip to window. POOH. 15. Change to 7" rams on ROPE. Test to 250 psi low / 3500 psi high. 16. Run and cement a 7", 26#, L-80, BTC-M intermediate drilling liner. Test to 3,500 psi. 17. Change back to 3-1 /2" x 6" rams on BOPS. Test to 250 psi low / 3500 psi high. 18. M/U the 6-%8" Dir/GR/Res/Dens/Neu assembly with an insert bit. RIH to the 7" liner landing collar. 19. Drill out the 7" liner float equipment and cement to the shoe. 20. Displace the well to 8.6 ppg Flo-Pro drilling fluid. 21. Drill out the 7" shoe plus ~20' new formation, pull up into the shoe and conduct an FIT. 22. With the insert bit drill through Zone 4 and Zone 3 landing the well in Zone 3 and building back to Zone 4. Drill to TD at 12027' as per the directional plan. A bit trip may be required depending on how much chert is encountered in Zone 3. MAD pass heel section only (<15 deg DLS) 23. Circulate and rotate at max rates to clean well bore, pull to shoe, circulate. POOH. 24. Run and cement the 4-~h", 12.6#, 13Cr, Vam Top solid production liner. POH laying down DP as necessary. W-31A Permit to Drill Page 7 25. Run on DP 300' of 2.5" PJ Omega, 4 spf pert guns and shoot over balanced. Fire guns, POOH. LD remaining DP. 26. R/U and run a 4-'/z", 12.6#, 13Cr, Vam Top tubing completion with HES Symphony pressure gauge and 8 GLM's, stinging into the 4'/z" liner tie back sleeve. 27. Set packer and individually test the tubing and annulus to 3,500 psi for 30 minutes. Record each test. 28. Set a BPV. 29. Nipple down the BOPE. Nipple up the tree with hydraulic SSV and test to 5,OOOpsi. 30. Freeze protect the well to 2,200' TVD with diesel. Secure the well. 31. Rig down and move off. Post-Rig Operations: 1. MI / RU slick line. Pull the ball and rod / RHC plug from landing nipple below the production packer. Install gas lift valves. 2. Install well house and instrumentation. W-31A Permit to Drill Page 8 TREE= 4" FMC WELLHEAD = McEVOY ACTUATOR = BAKER KB. ELEV = 90.88' BF. ELEV = 54.68' KOP = 3100' Max Angle = 51 @5000' Datu m MD = 11494' DatumTVD = 8800' SS 13-3/8" CSG, 68#, L-80, ID =12.415" H ~~' Minimum ID = 3.725" @ 10935' 4-1/2" OTIS XN NIPPLE W-31 2099' Ha-1/r' CAMCO SSSV NIP, ID=3.813" GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 5 3000 2908 6 Mff2LA RA 4 6285 5356 50 Mff2LA RA 3 8874 7064 50 MB~LA RA 2 10593 8156 49 M62LA RA 1 10781 8281 48 MERLA RA 10849' H 4-1 /2" OTIS X NIP, ID = 3.813" 10856' H4-1 /2" TBG SEAL ASSY I 10871' 9-5/8" x 4-12" TMJ HB-BPPKR ID= 4.0" TOP OF T' LNR ~--~ 10924' 10913' 4-1 /2" OTIS X NIP, D = 3.813" 10935' 4-1 /2" OTIS XN NIP, ID = 3.725" 4-1/2" lBG, 12.6#, L-80, 0.0152 bpf, ID =3.958" 10947' 10947' 4-1 /2" TBG TAIL, ID= 3.958" 1fl9fi4' ~MD TT LOGGED 05/14/92 ~ 9.5/8" CSG, 47#, L-80, ID = 8.681" ~ PERFORATION S UMMA RY REF LOG: HLS - BHCS ON 01/09/89 ANGLE AT TOP PERF: 35 @ 11546' Note: Refer to Production DB for h'storical oerf data SIZE SPF INTERVAL OpnlSgz DATE 3-3/8" 4 11546-11566 O 08/26/90 3-3/8" 6 11571-11576 O 11 /01/94 3-3/8" 4 11652-11682 O 03/12/89 3-3/8" 4 11694-11706 O 08/26/90 3-3/8" 4 11716-11730 O 05/14/92 PBTD ~ 11938, 7" LNR 26#, L-80, 0.0383 bpf, ID=6.276" 11980' 11409' H MA RKER JOINT 11886' H OUTER RUBBER COV Eft FROM IBP I 11925' 10' X 3/4" SPANG JARS & W IRE BRUSH DOTE REV BY COMMENTS DATE REV BY COMMENTS 01/14/89 ORIGINAL COMPLETION 02/15/01 SIS•OAA CONVERTED TO CANVAS 03/06/01 SIS-LG FINAL 09/09/01 RN/TP CORRECTIONS PRUDHOEBAY UNfT WELL: W-31 Pff2MR No: 88-1540 AR No: 50-029-21900-00 Sec. 21, T11 N, R12E BP Exploration (Alaska) WELLHEAD= McEVOY ACTUATOR= ~ectric KB. ELEV = tbd BF. ELEV = tbd KOP = 9790 Ntax Angle = 125 Datum MD = tbd Datum ND = 8800' SS W -31~ Proposed SAFETY NOTES _ 2200' 4-1 /2" X nipple 13-3/8" CSC, 68#, L-80, ID = 12.415" ~ 2699' Minimum ID = 3.725" @ 10935' 4-1 /2" OTIS XN NIPPLE T' TOL 9640' 41 /2" TBG, 12.6#, 13-CR, .0152 bpf, ID = 3.958" ~--) 10768' 9-5/8" Whipstock 9790' \ 9-518" Bridge Plug 9810' \ REF LOG: A NGLE AT TOP PERF: Note: SIZE SPF INTERVAL Opn/Sqz DATE 2.5" 4 300' 10918' ~-~ 7", 26#, L-80, BTCM, 0.0383 bpf, ID = 6.27 PBTD ~-~ 11947' TOC 10947' ~ 4-1/2" TBG, 12.6#, L-80, .0152 bpf, ID = 3.958" ~ TOP OF 7" LNR I~ 10924' }7 9-5/$" CSC, 47#, L-80, ID = 8.681" 11185' PBTD 11938' 7" LNR, 26#, L-80, .0383 bpf, ID = 6.276" 11980' ST M1AD ND DEV TYPE VLV LATCH PORT DATE 8 tbd 7 tbd 6 tbd 5 tbd 4 tbd 3 tbd 2 tbd 1 tbd 9620' Symphony Gauge 10871' 7" x 4-1/2" S-3 PKR 4-1 /2" LNR, 12.6#, 13-CR, .0152 bpf, ID= 3.958~~ 1 DATE REV BY COMMENTS DATE REV BY COMMENTS 01/14/89 ORIGINAL COMPLETION 09/09/01 RN/TP CORRECTIONS 12/25/07 DTR/TLH 41 /2" XXN PLUG SET 01/02/07 BJP W-31A Proposed 114-iMARKERJOINT 11886' OUTER RUBBER COVER FROM IBP 11925' ~-~ 10' X 3/4" SPANG JARS & WIRE BRUSH PRUDHOE BAY UNIT WELL: W-31 A Proposed PERMIT No: tbd API No: 50-029-21900-01 Sec. 21, T11 N, R12E BP Exploration (Alaska) by W-31A (P12) Proposal Schlumberger Report Date: August 12,2008 Survey 1 DLS Computation Method: Minimum Curvature I Lubinski Client: Field: Structure 1 Slot: BP Exploration Alaska Prudhoe Bay Unit - WOA W-PAD / W-31 ~ 0~' Vertical Section Azimuth: O~ Vertical Section Origin: ~ TVD Reference Datum: 284.600° N 0.000 ft, E 0.000 ft Rotary Table Well: W-31 rove TVD Reference Elevation: 81.60 ft relative to MSL Borehole: Plan W-31A ppp Sea Bed 1 Ground Level Elevation: 53.08 ft relative to MSL UWIIAPI#: 500292190001 Magnetic Declination: 22.811 ° Survey Name 1 Date: W-31A (P12) I August 12, 2008 Total Field Strength: 57671.447 nT Tort 1 AHD I DDI I ERD ratio: 227.127° 17390.84 ft 16.583 / 0.816 Magnetic Dip: 80.868° Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: 15-Oct-08 Location LaVlong: N 70.29826218, W 149.09468404 Magnetic Declination Model: BGGM 2008 Location Grid NIE YIX: N 5959482.870 ftUS, E 611788.980 ftUS North Reference: True North Grid Convergence Angle: +0.85232714° Total Corr Mag North -> True North: +22.811 ° Grid Scale Factor: 0.99991420 Local Coordinates Referenced To: Well Head Comments Measured Inclination Azimuth Sub-Sea TVD TVD Vertical NS EW Mag 1 Grav DLS Directional Northing Easting Latitude Longitude Depth Section Tool Face Difficulty ft de de ft ft ft ft ft de de 100 ft Index ftUS RUS I ie-in survey TJF Top Whipstock Base Whipstock KOP Crv 6/100 TJE TJD TJC End Crv TJB TJA TSAG 7" Csg Pt a/au./l 9790.71 9791.64 9800.00 9807.64 9819.64 9900.00 10000.00 10100.00 10109.75 10200.00 10300.00 10363.67 10400.00 10500.00 10600.00 10602.35 10609.81 10743.34 10816.65 10918.17 10918.18 UU.BL 50.52 50.53 51.18 51.78 51.78 47.94 43.36 39.09 38.69 35.24 31.96 30.26 29.45 27.92 27.53 27.53 27.55 27.55 27.55 27.55 27.55 WeIlDesign Ver SP 2.1 Bld( doc40x_100 ) L8`J.BI 289.81 289.81 290.80 291.68 291.68 295.50 300.93 307.34 308.02 314.96 324.06 330.69 334.75 346.86 359.76 0.06 1.03 1.03 1.03 /O~/.4l //3`J .VI 4084 .1/ 8/U.B/ -401J.03 rlJ U.O~ U.00 A.70UL04..`74 VU/ IVJ .JI IV lV.JUVOJ/NV VV 14.7.IJLU40U9 7657.41 7739. 01 4684. 17 870.87 -4613.63 HS 0.75 5.68 5960284.95 607163. 31 N 70.30063747 W 149.13204658 7658.00 7739 .60 4684 .89 871.11 -4614.31 50.OOR 0.75 5.68 5960285.18 607162 .63 N 70.30063813 W 149.13205203 7663.28 7744 .88 4691 .34 873.36 -4620.39 49.38R 12.00 5.68 5960287.34 607156 .52 N 70.30064427 W 149.13210129 7668.04 7749 .64 4697 .27 875.53 -4625.96 --- 12.00 5.69 5960289.42 607150 .92 N 70.30065017 W 149.13214641 7675.46 7757 .06 4706 .63 879.01 -4634.72 143.99R 0.00 5.69 5960292.77 607142 .11 N 70.30065967 W 149.13221737 7727.27 7808 .87 4767 .28 903.53 -4691.01 141.53R 6.00 5.72 5960316.45 607085 .46 N 70.30072656 W 149.13267335 7797.19 7878 .79 4836 .74 937.19 -4754.02 137.72R 6.00 5.76 5960349.16 607021 .97 N 70.30081840 W 149.13318378 7872.41 7954 .01 4898 .82 973.99 -4808.58 132.90R 6.00 5.79 5960385.14 606966 .87 N 70.30091885 W 149.13362584 7880.00 7961. 60 4904. 45 977.73 -4813.42 132.37R 6.00 5.79 5960388.81 606961. 97 N 70.30092906 W 149.13366508 7952.13 8033 .73 4952 .84 1013.53 -4854.10 126.82R 6.00 5.82 5960424.00 606920 .77 N 70.30102680 W 149.468 8035.47 8117 .07 4998 .20 1055.38 -4890.07 119.23R 6.00 5.85 5960465.31 606884 .18 N 70.30114107 W 149.1 626 8090.00 8171. 60 5022. 34 1083.02 -4907.82 113.56R 6.00 5.87 5960492.68 606866. 02 N 70.30121654 W 149.13443015 8121.51 8203 .11 5034 .42 1099.08 -4916.12 110.03R 6.00 5.88 5960508.61 606857 .49 N 70.30126040 W 149.13449738 8209.32 8290 .92 5061 .08 1144.15 -4931.93 99.40R 6.00 5.90 5960553.44 606841 .01 N 70.30138350 W 149.13462574 8297 .92 8379 .52 5077.91 1190.10 -4937.36 87.97R 8300. 00 8381. 60 5078.19 1191.18 -4937.36 87.70R 8306 .62 8388 .22 5079.03 1194.64 -4937.33 --- 8425. 00 8506. 60 5093.52 1256.39 -4936.22 --- 8490. 00 8571. 60 5101.48 1290.30 -4935.61 --- 6 .00 5.93 5960599.29 606834.90 N 70.30150901 W 149.13466991 6. 00 5.93 5960600.38 606834.88 N 70.30151198 W 149.13466993 6 .00 5.93 5960603.83 606834.86 N 70.30152141 W 149.13466968 0. 00 5.93 5960665.59 606835.05 N 70.30169013 W 149.13466104 0. 00 5.94 5960699.50 606835.15 N 70.30178277 W 149.13465630 0. 00 5.94 5960746.46 606835.30 N 70.30191104 W 149.13464973 0. 00 5.94 5960746.46 606835.30 N 70.30191105 W 149.13464973 1.03 8580.00 8661.60 5112.50 1337.25 -4934.77 1.03 8580.01 8661.61 5112.51 1337.26 -4934.77 W-31\W-31\Plan W-31A\W-31A (P12) Generated 8/12/2008 2:26 PM Page 1 of 2 Comments Measured Inclination Azimuth Sub-Sea ND ND Vertical NS EW Mag 1 Grav DLS Directional Northing EasUng Latitude Longitude Depth Section Tool Face Difficulty ft de de ft ft ft ft ft de de 100 ft Index ftUS ftUS iJM(I 7U'JbY.U7 Z/AO 7.VJ t307V.VV COJ7.OU A770.7tl 7JOL.J7 -4J34.~i`J --- U. UU O./4 AyOV/OL.~~ 00003A.3A IV /V.JVIyD3/y VV /4J.13'i04/A4 Bld 13/100 11048.96 27.55 1.03 8695.96 8777.56 5126.70 1397.75 -4933.69 4.54E 0 .00 5.94 5960806.96 606835 .48 N 70.30207630 W 149.13464127 TE/L 11074.21 30.83 0.52 8718.00 8799.60 5129.65 1410.06 -4933.52 4.10E 13. 00 5.96 5960819.27 606835. 46 N 70.30210994 W 149.13464001 11100.00 34.17 0.09 8739.74 8821.34 5133.07 1423.91 -4933.45 3.74E 13 .00 5.97 5960833.12 606835. 33 N 70.30214778 W 149.13463950 TSAD 11103.95 34.68 0.04 8743.00 8824.60 5133.63 1426.15 -4933.45 3.69E 13. 00 5.97 5960835.35 606835. 30 N 70.30215388 W 149.13463949 W-31A Tgt 2 11106.38 35.00 0.00 8745.00 8826.60 5133.98 1427.54 -4933.45 HS 13 .00 5.97 5960836.74 606835 .28 N 70.30215768 W 149.13463950 45P 11153.40 41.11 0.00 8782.00 8863.60 5141.28 1456.50 -4933.45 HS 13. 00 5.99 5960865.70 606834. 85 N 70.30223682 W 149.13463965 8800ss Marker 11177.89 44.30 0.00 8819.04 8900.64 5144.04 1467.46 -4933.45 HS -13. 27 6.00 5960876.66 606834. 68 N 70.30226675 W 149.13463971 44P 11182.10 44.84 0.00 8803.00 8884.60 5146.21 1476.07 -4933.45 HS 13. 00 6.00 5960885.27 606834. 56 N 70.30229027 W 149.13463975 11200.00 47.17 0.00 8815.43 8897.03 5149.46 1488.94 -4933.45 HS 13 .00 6.01 5960898.14 606834 .36 N 70.30232544 W 149.13 3982 End Crv 11203.04 47.57 0.00 8817.49 8899.09 5150.02 1491.18 -4933.45 --- 13 .00 6.01 5960900.38 606834. 33 N 70.30233156 W 149.84 Crv 13/100 11233.14 47.57 0.00 8837.80 8919.40 5155.62 1513.40 -4933.45 HS 0 .00 6.02 5960922.58 606834. 00 N 70.30239224 W 149.1 995 43P 11240.93 48.66 0.00 8843.00 8924.60 5157.09 1519.20 -4933.45 HS 14. 00 6.02 5960928.39 606833. 91 N 70.30240809 W 149.13463998 42P 11274.31 53.33 0.00 8864.00 8945.60 5163.62 1545.12 -4933.45 HS 14. 00 6.04 5960954.31 606833. 53 N 70.30247892 W 149.13464012 11300.00 56.93 0.00 8878.69 8960.29 5168.93 1566.20 -4933.45 HS 14 .00 6.05 5960975.38 606833 .22 N 70.30253650 W 149.13464023 41P 11346.95 63.50 0.00 8902.00 8983.60 5179.20 1606.93 -4933.45 HS 14. 00 6.07 5961016.10 606832. 61 N 70.30264777 W 149.13464045 11400.00 70.93 0.00 8922.53 9004.13 5191.52 1655.80 -4933.45 HS 14 .00 6.09 5961064.96 606831 .88 N 70.30278128 W 149.13464071 31P 11455.19 78.65 0.00 8937.00 9018.60 5204.93 1709.02 -4933.45 HS 14. 00 6.12 5961118.17 606831. 09 N 70.30292668 W 149.13464099 11500.00 84.93 0.00 8943.39 9024.99 5216.11 1753.35 -4933.45 HS 14 .00 6.14 5961162.49 606830 .43 N 70.30304777 W 149.13464123 W-31A Tgt 3 11536.24 90.00 0.00 8945.00 9026.60 5225.23 1789.54 -4933.45 HS 14 .00 6.15 5961198.67 606829 .89 N 70.30314664 W 149.13464142 11600.00 98.93 0.00 8940.04 9021.64 5241.24 1853.04 -4933.45 HS 14 .00 6.18 5961262.16 606828 .95 N 70.30332013 W 149.13464176 11700.00 112.93 0.00 8912.67 8994.27 5265.42 1948.96 -4933.45 HS 14 .00 6.22 5961358.07 606827. 52 N 70.30358218 W 149.13464227 End Crv 11792.25 125.84 0.00 8867.50 8949.10 5285.63 2029.17 -4933.45 --- 14 .00 6.26 5961438.26 606826. 33 N 70.30380131 W 149.13464269 TD / 4-1/2" Lnr 12027.08 125.84 0.00 8730.00 8811.60 5333.62 2219.54 -4933.45 --- 0 .00 6.29 5961628.59 606823 .50 N 70.30432137 W 149.13464371 Legal Description: Northi ng (Y) [ftUS] Easting (X) [ftUSj Surface : 4509 FSL 1443 FEL S21 T11N R12E UM 5959482.87 611788.98 Tie-In : 4509 FSL 1443 FEL S21 T11 N R12E UM 5959482.40 611788.54 W-31A Tgt 2 : 655 FSL 1093 FEL S17 T11 N R12E UM 5960836.74 606835.28 W-31A Tgt 3 : 1017 FSL 1092 FEL S17 T11 N R12E UM 5961198.67 606829.89 TD / 4-1/2" Lnr / BHL : 1447 FSL 1091 FEL S17 T11 N R12E UM 5961628.59 606823.50 WeIlDesign Ver SP 2.1 Bld( doc40x_100) W-31\W-31\Plan W-31A\W-31A (P12) Generated 8/12/2008 2:26 PM Page 2 of 2 by ° ~ ` Schlumberger WELL W_31A (P12) PIELD Prudhoe Bay Unit - WOA STRUCTURE W-PAD Magnetic Parameters Surface location NAD2] Alaska State Planes. Zone 06, US Feet MisceNareaua Motley. BGGM 2008 Dip: BO.B68° Dale October 15. 2008 Lat'. N]0 t]53.]m NoaMng 5959682.8]ltUB Gritl DOnV: ~085232]id° 8bt: W~31 ND Ref: Rotary Table (81 fi011 above MSL) Meg Dec: ~220t t° FS'. 5]6]19]8 nT Lon: Wt6956088J Eastirg'. fit1]8B 98 flU5 Scalp Fact: 099991619fit Plan'. W-31A iPt2) Srvy Date'. O N C a~ m U Cn 0 2000 2250 2500 2750 3000 3250 7750 8000 8250 8500 8750 9000 9250 -31 Tie-In Survey Top Whipstock Base Whipstock KOP Crv &100 .................. ................................................................................................................................................................_............................... 1 E ............~ ..................................:..................................................................i..................................~................................................................. f ._.._ - _.._.._.._.._.._.._.._ _ ._.._.._.._.._ JLL.._ _ _.._.._.._.._.._.._..___.._.._.._.._.._.._.._. _.._.._.._.._.._.._.._ _ _.._.._.._-._.._.._. _ End Crv ............:..................................:..................................:......... .......................:..................................:...................................>... f ._.._ _ _.._.._.._.._.._.._.._ ._.._.._.._.._.._.._.._ 7~._.._ _ _.._.._.._.._ _.._.._.._.._.._.._.._. _ _.._.._.._.._.._.._.._. _ _.._.._.._.._.._.._.:_ . _.._ _ _.._.._.._.._..~..-.._ _ ._.._.._.. _.._.._.._.._ _ J!i _.._. _.._.._.._ _..-.._.._.._.._.._.._. _.._.._.._.._.._.._.. _. _ _.._.._.. _.._.._.._.._ .._.._...._.._.-_.._.._.._.._.._..~.._.._.._.._.._.._.._.._._.._ b ~_ ._.._ _ ._.~._.._.._.._.._.._.._.._.._._.._.._.._.._.._.._.._...._.._.._.._.._.._.._.._ ............~ ..................................~................................. ~.............. ~ TD 14112 ...... E ................. •.................................... - .. Lnt .._.._...._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.iw~~2_.._.. .~..___.._ _.._.._.._.._. _.._.._.._.._.._.._.._. _ _.._. _ .._.._.._.._ End Crv .._.._..i.._.._..~.._.._.._.._.._..i.._.._.._.._.._.._.._.._.:_.. _.._.._.. _.. _.._ _.. ~_.._.._.. .._.._.._.._.. _i._.._.._.._.._.._.._.. ._ _.. _.._ .. ~. ._.._.._.._.._.._. ~ 45 .._.._..a.._.._.._.._.._.._.._.._..~.._.._.._.._.._.._.._.._.i-.._.._.._.t41dCn.. ._.. .. _.._ ._.._.._.._.._:._.._. _.._.. _.._ .. _.. _43P.. Crv 131100 .. .. ......................................................................................................................,........... .................................. .............4~p........................ 41P ;°° W ATgta 31P W-31 '750 1000 '.250 X500 '.750 1000 9250 2000 2250 2500 2750 3000 3250 Vertical Section (ft) Azim = 345°, Scale = 1(in):250(ft) Origin = 0 N/-S, 0 E/-V by ° r ~ Schlumberger WELL FIELD STRUCTURE W-31A (P12) Prudhoe Bay Unit - WOA W-PAD Magnetic Parameters SuNace LOCatron NnD2] AlasMa Stare Planes. Zone 04, US Fee( Mlscel~aneous Motlel: BGGM 2008 OiP: 90.968° Oale: October t6. 2009 lal: N]01] 5).]44 Mr,ng: 9959482.8] flU5 GM GMV'. •0.&5232]14° $IOL: W-91 ND Rel: Rotary Table (81 fi0 fl above MSI) Mag Dec: .22811° FS'. 9]fi]t 9]9 nT Lon: W149 5 40 869 Easung: fi11 ]99.98 RUS Srale Fact 0.9999141961 Plan: W31A IP12i Srvy Dala: -5600 -5400 -5200 -5000 -4800 -4600 W-31A (P12 J ..................................:................... ......:...... 7D / 4-112" Lnr 8800ss Marker End Crv 2400 .............. 2200 .........F..... 2000 ..........:..... A A Z 1800 O O N C N ~ 1600 V V V 1400 1200 1000 W-37A Tgt 3 .......... :...................................j. ..........................-....:........................ . ......... ................. .... j.... ............................;..................... Crv 13!100 End Crv W-31A Tgt 2 Bld 131100 r csg Pt W-31A T$4D Hardline End Crv ..........~ ...................................j..................................j..................................4... ICAP Crv 61100 1Base Whipstock //~T e-IWSurvey k i00 -5400 -5200 -5000 -4800 -4600 «< W Scale = 1(in):200(ft) E »> 2400 2200 2000 1800 1600 1400 1200 1000 wal(YE __ .-- - -- --- W=~ 1 ~~~~A ~- U ~~~~ --~~.0_ -~aoo a • STANDARD ALASKA PR ~~TION COMPANY NELLHEAD LOCATION DATA 1) WELL: W-31 FIELD: Prudhoe Bay Unit 2) Well Head Location 770 'from North line 1443 'from East line Section 21, T 11 N, R 12 E, UPM X . 611,788.98 Y 5,959,482.87 ASP Zone 4 LAT ~ 70°I7'53.744" N, LONG • 149°05`40.862" W 3) Local Benchmark Elevation Pad "Mon.-2" E1. 47.83 Ft. AMSL 4) Top Edge of Cellar N"t Corner E1. 53.08 Ft. AMSL 5) Kelly Bushing to Base Flange` -- ~h - ft. AMSL 6) Kelly Bushing to Ground Level` 7) Base Flange Elevation 8) Kelly Bushing Elevation `Measured by Drilling Foreman NOTES: 3~.8o Ft. AMSL 54.68 90.88 Z) The surveyor should fill in Items 2. 3 and 4. Ft. AMSL Ft. AMSL 2) The completed form should be returned to Drilling Dept. far distribution. CI RCULATIOti North Slope Production Engineering (North Slope. BOC) - l Reservoir Engineering Operations (M89-2) - 1 North Slope - to Rig for Posting (North Slope. BOC) - 2 Well Records (LR2-1) - 11 Well Files (MB12-1) - 1 Drilling, Technical Assistant (MBl2-1) - 1 Drilling, Completion Technical Assistant (MBi2-1) - 1 Graphic Services, Supv., Cartography (MB2-4> - 1 OF A~ S 1 P~'E~,......... ~4 1 i 9 _. /~...1.u........u.........~:• • s,., ~ gerno'c Tor..uSrh ,c ~f ~~. LS =358 ~ s :.~='~ ~ ~I_ a•. ~~ ~ t~ / yovember 15, 1986 Date Oilfield Services, Alaska Schlumberger Drilling & Measurements 2525 Gambell, Suite 400 Anchorage, AK 99503 Tel (907) 273-1766 Fax (907) 561-8367 Tuesday, August 12, 2008 Garret Staudinger BP Exploration (Alaska) Inc. Schlnmb~ger Prudhoe Bay W-31A (P12) Nabors 7ES Close Approach Analysis We have examined the potential intersections of subject well with all other potentially conflicting wells, according to the BPA Directional Survey handbook (BPA-D-004) dated 09/99. Method of analysis: 1. A list of wells to be analyzed is created in Compass by performing a global scan with an initial search radius of two hundred feet with an increment of one hundred feet for every one thousand feet of measured depth in the subject well. 2. Wells are analyzed using the Compass Anti-collision module (BP Company setup) with major risk safety factors applied. For problem wells that are plugged and abandoned or that can be shut in, risk-based safety factor may be used, with client notification. 3. All depths are relative to the planned well profile. Survey Proaram: Instrument Type Start Depth End Depth Boss Gyro 190.70' and 9790.70' and Blind 9790.70' and 10100.00' and MWD + IFR + MS 10100.00' and 12027.08' and Close Approach Analysis results: Under method (2), note. W-34AP61 and W-34A fail the major risk rule. These wells have been evaluated using the Tolerable Collision Risk Worksheet. The wells are now scanned using the 1:50 risk rule, and pass. All data documenting these procedures is available for inspection at the Drilling & Measurements Directional Planning Center. Close Approach Drilling Aids to be provided: A drilling map and traveling cylinder will be provided. °. Checked by: Scott DeLapp 08/12/2008 --~P A a~ ~ -- _ - -_ - _- _- ___-_ tsiorr- r~ II~ Company: BP Amoco Date: 8/12/2008 Time: 14:45:31 Page: I I Field: Prudhoe Bay I Ref€rence Site: PB W Pad Co-ordinate(NE}Reference: WeU: W 31 True North - - - - - , - - Reference Well: W-31 Vertical (TVD) Reference: W-31A Plan 81.6 Reference Wellpath: Plan W-31A Db: Oracle ---_ - - _ _ - GLOBALSCAN APPLIED: All wellpaths within 200'+ 100/1000 of reference -There are i~QYLfiaeells in thisRtrid~pal Plan & PLANNED PROGRAM __ -- Interpolation Method: MD Interval: 5.00 ft Error Model: ISCWSA Ellipse - -lTeptr-Range: 979~Y64-is--12 027:08-~----_ _ - --~canlCtefhod: -- TravCylind~rNorth--_ I Maximum Radius: 1399.86 ft Error Surface: Ellipse + Casing ! ~ Survey Program for Definitive Wellpath ----- - - ~ Date: 11/21/2007 Validated: No Version: 12 -- _ .-_PIaAAGd-~r9n4~~A -- SU~rYGy-__ ---.-___....._ ~-~gplgnoral~ _ _Tnnl N~~ ft ft 190_.70__ 9790.70 1 :Sperry-Sun BOSS--gyro MS (1 BOSS-GYRO _-S~err~Sun BOSS gyro multishot 9790.70 10100.00 Planned: Plan #12 V1 BLIND Blind drilling ~ 10100.00 10860.00 Planned: Plan #12 V1 MWD+IFR+MS MWD +IFR + Multi Station _------ 119869 90-'F2827 08 ---~la~ned~tan#'I~~'~ - - - _ -- -_MWD ~VFWD+tFR+MS +IFR+M lti St ti : : __ _ - - u - a on Casing Points MD TVD Diameter Hole Size Name ft ft in in - 2600.00 2599.93 13.375 _ 17.500 13 3/8" - 9791.64 7739.60 9.625 12.250 9 5/8" 409'F8 17- -86660- X000--- 8 500- 7" - ---- -- - - _- - - : : 12027.08 8811.60 4.500 6.500 4-112" - - - - _ - - ummary - - - - - --- <-- "Offset Wellpath - - ~ Reference Offset Ctr-Ctr No-Go Allowable - - ii Sites Well .Wellpath M$ Mb ~sta~ce Area Deviation Warning ft ft ft ft ft --- -- - _ i _ RB-Wad- ~+arrW-40'F- - ~IafrW-48~ W-Ptart: PI - - - - n~ ~t of range- - - PB WPad W-15 W-15 V2 Out of range PB W Pad W-15 W-15A V12 Out of range ~, PB W Pad W-15 W-15P61 V6 Out of range i PB W Pad W-15 W-15PB2 V2 Out of range -- r_PB W Pad W-16_ ____-__- W-16 V4 - ----- - _ - _ _ Out_of ran e PB W Pad W-16 W-16A V4 Out of range ', PB W Pad W-16 W-16AP61 V2 Out of range - RB W-Pad- -- ~"~ , ~ - rte- _ W-1 ~VV4 - _ - - - _ - - - -- -- Out range- _ - - - - PB W Pad W-17 W-17A V9 Out of range PB W Pad W-18 W-18 V2 Out of range __ ~-PB71V Pad G~1~ _--- - P~~IV=19B VSPIan: Pf _--- -- ----- -- ------ 6uLof-range PB W Pad W-19 Plan W-19BL1 V4 Plan: Out of range PB W Pad W-19 W-19 V3 Out of range '~ !, PB W Pad W-19 W-19A V3 Out of range ' PB W Pad W-19 W-19AL1 V4 Out of range ~ PB V1F Pad-- ~V-19 _ _ W ~9A~1 PB7-!/3 ~ -_- _ _ - - - -- --- Au~of range- - -- PB W Pad W-19 W-19AL1 PB2 V2 Out of range ', PB W Pad W-200 W-200 V2 Out of range -PgWPad-200 _ _ - ---G1r200PB1-V1'~ _ _ - -- - ---_ _ _--.Out of rarige -- r ---___ ___ PB W Pad W-204 W-204 V2 Out of range j -_ PB_W__Pad __-_ W-204 __- _-W-204L1_V6 -_-__ __ Out ofranae --- -- _ PB W Pad W-204 W-204L2 V6 Out of range ', PB W Pad W-204 W-204PB1 V2 Out of range ~ -PB W Pad - -W-20 ~f-24V2- -____ mat of ', PB W Pad W-211 W-211 V9 Out of range ', PB W Pad W-212 W-212 V12 Out of range ', PB W Pad W-213 W-213 V13 Out of range ', PB W Pad W-21 W-21 V3 Out of range ', PB W Pad W-21-_ _-____ ___-_W-21_A V13 _ -_---- - - Out of range ', PB W Pad W-22 W-22 V2 Out of range ~ ', PB W Pad W-23 W-23 V5 Out of range - --PB-4~Rad~IiF-23 - - _ -a/Y-23A-V$ -- _ - - - ~ U~ ~t ofrange - ', PB W Pad W-24 W-24 V2 Out of range I PB W Pad W-25 W-25 V2 11676.70 10650.00 1333.91 323.46 1010.44 Pass: Major Risk ~, PB-WPad- Vf1=26- - V11-26 V4 -- - ~- - -Ou f~ange - - ~ - PB W Pad W-26 W-26A V1 Out of range I PB W Pad _ ____ W-27 Plan W-276 V1 Plan: PI Out of range I ___- -_- PB W Pad W-27 _ W-27 V4 _ _- _ _ _- - Out of range ___ __ Company: BP Amoco Field: Prudhoe Bay ~_ Reference Site: PB W Pad - II Reference Well: W-31 Reference Wellpath: Plan W-31A Date: 8/12/2008 Time: 14:45:31 Page: 2 - Ca-ordiaate(NF,} Rcfereacg: ---Well: W-31, True North Vertical (FVD) Reference: W-31A Plan 81.6 ~ Db: Oracle - _ Summary I <- Offset ~y'ellpath _ _ -> Reference. Offset Ctr-Ctr _ No-Co - .Allowable - Site PB W Pad PB W Pad Well W-27 W-29 W-30 - Wellpath ___ W-27A V4 W-29 V3 ,A130 V2 MD MD ft ft _ __ llistance .Area Deviation ft ft ft Warning _ y Out of range Out of range n~~r~ ng° - f~a - PB W Pad PB W Pad - ---- W-31 W-32 - -- --- W-31 V4 W-32 V8 - --- 9865.63 9875.00 - - -_ _ 2.34 1688.97 1686.63 FAIL: Ma'or Risk Out of range } PB W Pad PB W Pad W=32 - __ __ W-32 W-34 - _ W=32A V3-_ W-32AP61 V15 W-34 V2 - - __ 10885.42 10825.00 -- --- - - 1332.141217.29 114.85 Out of-ranges Out of range '~ Pass: Ma'or Risk ____ - PB 1N Pad PB W Pad p B W Pad W-34 W-34 w_~~ W-34A V2 W-34AP61 V3 w_~~ v~ 10578.44 10845.00 10578.44 10845.00 1255.76 0.00 1255.76 1255.76 0.00 1255.76 Pass: Minor 1 /50 !, Pass: Minor 1/50 !, i n~~r f ~o.,go __--- - - _ -- - PB W Pad - W-36 _ W-36 V3 - - -- _ _ _ _ - a~ Out of range ~, • FieldPrudhoe Bay SitePB W Pad We11:W-31 _ WellpathElan W-31A From KOP to TD Scan interval l00 ft Scale 1:50 313 300 200 100 0 2 W-31 100 200 300 -3 1 3 0 Travelling Cylinder Azimuth (TFO+AZI) [deg] vs Centre t 6050000 6000000 5950000 5900000 EPA Aquifer Exemption - 40 CFR 147.102 (b)(3) 5850000 400000 500000 600000 700000 800000 i Alaska Department of Natural Resources Land Administration System Page 1 of~ ~ ,~ an~~ ~ ::•. r: ~ "'- ~~_..~ ~ a..- .=::~ord~r's Search: Sfate Cabins b1~U>t~~~ ~D~1S _.___---_--- Alaska DNR Cass Summary File Type:. a~L ? File Number: 28262 ~ Printable Case File_Summ.a. ry See Township, Range, Section and Acreage? ~„ ~,,, ___ New Search Yes No L~1S ~"^~•_ ~ Case Abstract ~ Case detail I Land A4~stract ~, I~~ilc: ,~DL 2R2(i2 ~ ~'~'~ Search for Status °!at Updates Customer.: 000107377 BP EXPLORATION (ALASKA) INC PO BOX 196612/900 E. BENSON BL ATTN: LAND MANAGER- ALASKA ANCHORAGE AK 995196612 Cure Type: ~~~ OIL & GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location: DOG DIV OIL AND GAS Case Status: 35 ISSUED Status Date: 08/26/1965 Total Acres: 2480.000 Date Initiated: 05/28/1965 Office of Pf~imary Responsibility. DOG DN OIL AND GAS Last Transaction Date: 12/04/2006 Case Subtype : f~~ NORTH SLOPE Last Transaction: AA-NRB ASS IGNME NT APPROVED Jferrdian: U Townshrj~: Ol l:A~ Rcnl~~c~: 012L: a'e~~troft: l7 Sectis~it 1(c~~c~s: 6=-10 Search Pints ;lleridr~r~r.~ l! Toti~ ras/trig: O l l ti Rurt~~e.~ 01 ? I`, S'~~~ lion: 18 ,ti~t~ctrun _~I c~re.e: 599 I/r'IYdRll1.~ 1_~ ~U11'iL~~llj): ~~~~ ~ ~~Ui7~['.' O~ ~~', .~L«~/(~/]. ~ ~) .1l'i"11012 r1('rC'J: ~)O 1lc~~ic/iu~t: tr To~rn~hrp: Oll~' h~a~r~c~.~ 01~1~. Srctic~n.~ ~U ,ti'c>ctir~n :lrrc°i~: 6=10 Legal Description OS-?8-196 * ~` ~` SALE NOTICE LEGAL DESCRIPTION ~CI =1- 58 TI I N, R I ZE, U>tiI 17, 18, 19, 20 2,180.00 12-0=1-1969 *** ASSIGNMENT LEGAL DESCRIPTION *~` Sf>G~17ENT 1 T 11 N. R 12E. U~~I http://www. dnr.state. ak.usllas/Case_Summary. cfm?FileType=ADL&FileNumber=28262&... 8/26/2008 • • T~NSMITTAL LETTER CHECKLIST WELL, NAME ~.~L/ !rj/_.,~/A PTD# ~?~~~36 O /Devetopment~ __ Service _ Exploratory S _,_,_ on-Conventional Well tratigraphic Teat FIELD: f~.~/.~yOzt' ~ Ay POOL: ~.e!/.D~ /,qy d ~ Cirde Appropriate Letter /Paragraphs to be Incinded in Transmittal Letter CHECK ADD-ONS WHAT (OPTIONS) ~~. FOR APPROVAL LETTER APPLES MULTI LATERAL The permit is for a new wellbore se gment of existing (If Iast two digits in well API numb are Permit No. . AP[ No. SO- between 60-69) Production should continue to be reported as a function of the ociginal API number stated above. PILOT HOLE In accordance with 20 AAC 25.005(1) ~ acquired for the pilot hole must be clearly differentiated inn both well name ( PIS and API number (sue = :-_.) 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 /insect is contingept upon issuance of a conservation order approving a spacing exception. assumes the liability of any protest to the spacing exception that may occur. '"" ` "" `'" All dry ditch sample sets submitted to the Commsssion must be in SAMPLE no greater than 30' sample intervals from below the from where samples are first caught and 10' sample nt~r trals throu et nines. Non-Conventional please note the following specsal conditson of this permit: Well production or production testing of coal bed me~ane is not allowed for Iname of well) until after (Comnanv Nance) has designed and implemented a water well testing program to provsde baseline data on water quality and quantity.lComnanv Name) must contact the Commissson to obtasn advance approval of such water weft testing prOftram. Rev; Uf 1/2008 WELL PERMfT CHECKLIST Field & Pool PRUDHOE BAY, PRUDHOE OIL -640150 Well Name: PRUDHOE BAY UNIT W-31A Program DEV Well bore seg ^ PTD#:2081360 Company BP EXPLORATION (ALASKA) INC Initial Classlfype DEV I PEND GeoArea 890 Unit 11650 OnlOff Shore Qn Annular Disposal ^ Administration 1 Pe[mitfeeattached-- -- --- ---- -- - - -- ----- - ~-- ...- -- -- - - - ----- ----- ----- --- - ---- - - --- ~ 2 Lease numberappropriate- ---- ---- - -- -- -- ----- Yes_... - --- - -- ----- ------ ----- - - ----- ---- 3 Uniquewell_nameandnumber---------- ---- -- - -- --Yes ----- - -- -- - --- --- --- - --- ---- -- - 4 WelUxakedln-a-defined-pal --- - - - -- - --- ----- -Yes - - --- --- - - - ----- - --- - --- -- - - 5 WeII IQ~ted p(oper distance from drihing unit_bo~ndary - - - - - - - -Yes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6 Well located Proper distance from other wells- - - - - - - - - - - - - - - - Yes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 SufficientaCreageayailableindtiilingunit_____________________. ---_--_--Yes __-- -2560 acres..----------------------------------------------------------- 8 If-deviated~iswellborePlatincluded ---- --- --- -- - ---- -Yes --- - - - - -- --- --- ------ -- -- ----- 9 Operatoronh!affectedPadY-- -- --- -- --- --- ----Y~ ---- -- --- ----- --- ---- - --- -- - - ----- 10 Operator has-appropriate bond in foroe________--__--_--_-__ _ -_---Yes------ -BlanketBond#6194199-----------------------.-------.-----.------- ----- 11 PermikcanbeissuedwiihQUtconser~ationorder------------------- ---------Yes------ ------------------------------------------------------ --- Appr Date 12 PetmitcanbeissuedwithoutadminigtCative_approval---------------- ---------Yes------ -------------------------------~-------------------- --- - - 13 Can pennit_bQ aRpr4ved before 15-daY-wait - - - - - - - - - - - - - - Y~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ACS 812612008 14 -WetUocatedwiihinareaands#raiaauthQrizedbylnjectionOrder#(put1O#in-comments)-(For-NA---___ __________________--______________--___-__---_--_____--__________ 15 Allwel~withln1l4-mile_areaof[eyievridenilfled(FOtserv_ieewellonly)--_-- --__--___ tyA---___ __-_._______________________--_--_------------------------ 16 Pre-produced injector.d~rrationofpreproduciionlessthan9monihs-(Far service wellQnly)---NA------ ------------------------------------------------------ -- --- 17 Nonconven: gas confgrms to AS91,05,0906.1.A).t12.A•D) - - - - - - - - ~- - - - - - - - - - - - - - - - - - - - - - - - - - - Engineering 16 Conductorstnng_R~+~-~------------------ - - -- ---- -~- ---- -Conduciorset_inW31-(168.154).-------------------------------------------__--- 19 SutfacecasingprotectsallknownUSDWS--------------------- ---------NA------- -AQaquifers exempted AE91.--------------------------------------------- 20 CMT-voladequate-tocirculate-onconducior8 surfcsg______________ _________ NA__---_ _Surf_acecasieg set in-W~1,-----_________________--__--__-__--_________-._ 21 CMT-voladequate-to#ie-inl2ng stringkosurfpsg--________________ _________NA-______ _Production-casingsetinW-31.-_--______________-___--._-_---__---_______-_ 22 CMT wilt cover all known_Productae horizons- - - - - - - - - - -Yes - - - - - - - - - - - - - - - - - - - - - - - 23 Casing designsadequaleforC,Tt3&-permafLost------------------ -----_--Yes-.--- -.-------------------------------------- -------- -- --- -- 24 Adequate tankage_or reserve pit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Yes _ _ _ - _ _ _ Rig equipped with steel pits, No reserve p!i planned._ All waste_to approved disposalwell(s). - - - _ _ . _ _ 25 Ifa_re~drill,has_a10.403foraband4nmenkbeenaRRroved------------ ---------Yes------ -308.279-------------------------------------------------------------- 26 Adequate wehbore separakionptoposed_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Yes _ . _ _ _ _ _ Proximity analysis performed, Traveling cylinder path calculated, Close approaches idendtlfied. - _ _ _ _ _ _ 27 Ifdivertarrequl~d,doeaitmeetregulations--------------------- --------- NA------ --BOPStackwillalreadY-be in place,---------------------_------------------------ Appr Date 28 Driping fluid-program schematic-& equip list adequate_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Yes _ _ _ _ _ _ Ma>amum expected forma#ion pressure 8,4-EMW,_ Planned MW up to-11,2-ppg in-8.5" hole and 6.6 ppg_in zone._ - TEM 8I28I2008 29 BOP~s,_dotheymeetra9ulation- -- -- -- - -- --- -Yes --- -- - - -- --- --- --- --- - - --- ---- -- ---. 30 BOPS-press rating appropriate; test to-(put prig in comments)_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Yes _ _ _ _ _ - _ MA$P calcula#ed at 2692 psi, 9500_psi-BQP test planned, - _ - _ _ _ _ - - _ _ - _ _ . - _ - - _ _ - . - . _ _ _ _ 31 Choke_manifoldcomRliesw/API_RP-53 (May84)- -- ---- --- Yes --- ------- ------ -- -~--- -- -- --- ------- 32 Workwihoccurwithoutoperationshutdown--------------------- --____--Yes----- -------------------------------------------------------------- 33 Is presence of H2$ gas probable. _ _ _ . - _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Yes _ _ _ _ _ . -10 ppm_ H2$ reported for W91, Mud should-preclude H2S on rig. -Rig has sensors_andalarms, - - - - - _ _ - _ 34 -Mechanical-condition of wells withinAQRyerkfied(Forservicewell only)---_ _---_---NA______ _-_____.--_---__-------------------------------~- - ------ Geology 35 Permikcanbelssuedwlohydrogensulfidemeasures________________ _______- No._____ __MaxH2$levelsforWpadaverage10.20ppm_-_____--___.._-_-_________-__--__-_____ 36 Data_ptesentedonpo#entiatoverpressurezones-- ---- - - ----- - NA- --- --- --~ ----- -- -- - --- ----- - ---~ -- - - ----- Appr Date 37 SelsmicanaNsis4fshallowgaszones ------~ - ---- -- - ---- - NA --- --- -- -- -- - --- --- - --- - --- -- -- - - ACS 8126!2008 38 Seabed.conditionsurvey_(if4ff•shore)------------------------- ----------Np-_-___ _-_---- 39 ContactnamelPhoneforweekly_progressrepor#s[exploratoryonly}-------- --------Yes-__-_ --Garret $taudinger-564.4242.------------.----------------------------_----- Geobgic Commissioner: Date: Engineering Date Public Commissioner: ~ ' er Date ~~'~~ ~~~~ _ ~'Z x•08 L~