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Home My WebLink About211-0037. Property Designation (Lease Number): 1. Operations Performed: 2. Operator Name: 3. Address: 4. Well Class Before Work:5. Permit to Drill Number: 6. API Number: 8. Well Name and Number: 9. Logs (List logs and submit electronic data per 20AAC25.071): 10. Field/Pool(s): Susp Well Insp Install Whipstock Mod Artificial Lift Perforate New Pool Perforate Plug Perforations Coiled Tubing Ops Other Stimulate Fracture Stimulate Alter Casing Pull Tubing Repair Well Other: Change Approved Program Operations shutdown 11. Present Well Condition Summary: Casing Length Size MD TVD Burst Collapse Exploratory Stratigraphic Development Service 14. Attachments (required per 20 AAC 25.070, 25.071, & 25.283) 16. Well Status after work: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. OIL GAS WINJ WAG GINJ WDSPL GSTOR Suspended SPLUG Authorized Name and Digital Signature with Date: Authorized Title: Contact Name: Contact Email: Contact Phone: PBU A-25B Hilcorp North Slope, LLC 3800 Centerpoint Dr, Suite 1400, Anchorage, AK 99503 211-003 50-029-20764-02-00 11610 Conductor Surface Intermediate Liner Liner 9185 80 3113 8141 2931 782 11161 20 13-3/8" 9-5/8" 7" 4-1/2" 8748 40 - 120 39 - 3152 38 - 8179 8052 - 10983 10826 - 11608 40 - 120 39 - 2772 38 - 6061 5980 - 8573 8419 - 9184 None 2670 4760 5410 7500 11161, 11211 4930 6870 7240 8430 11140 - 11286 4-1/2" 12.6# 13cr85 36 - 10834 8727 - 8870 Structural 4-1/2" HES TNT Packer 10710 8305 Torin Roschinger Operations Manager Leif Knatterud leif.knatterud@hilcorp.com 907-564-4667 PRUDHOE BAY, PRUDHOE OIL Total Depth Effective Depth measured true vertical feet feet feet feet measured true vertical measured measured feet feet feet feet measured true vertical Plugs Junk Packer Measured depth True Vertical depth feet feet Perforation depth Tubing (size, grade, measured and true vertical depth) Packers and SSSV (type, measured and true vertical depth) 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: 13a.Representative Daily Average Production or Injection Data Oil -Bbl Gas-Mcf Water -Bbl Casing Pressure Tubing Pressure Prior to well operation: Subsequent to operation: 15. Well Class after work: Exploratory Development Service StratigraphicDaily Report of Well Operations Copies of Logs and Surveys Run Electronic Fracture Stimulation Data Sundry Number or N/A if C.O. Exempt: ADL 0028286 36 - 8427 N/A N/A 372 464 51141 55281 19 37 350 350 760 1040 N/A 13b. Pools active after work:PRUDHOE OIL No SSSV Installed 10710, 8305 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION REPORT OF SUNDRY WELL OPERATIONS Sr Pet Eng: Sr Pet Geo: Form 10-404 Revised 10/2022 Submit in PDF format to aogcc.permitting@alaska.gov Sr Res Eng: Due Within 30 days of Operations By Grace Christianson at 9:08 am, Sep 26, 2025 Digitally signed by Torin Roschinger (4662) DN: cn=Torin Roschinger (4662) Date: 2025.09.25 19:43:04 - 08'00' Torin Roschinger (4662) J.Lau 11/5/25 RBDMS JSB 100225 ACTIVITY DATE SUMMARY 9/21/2025 ***WELL SHUT IN ON ARRIVAL*** (E-LINE ADPERF + PLUG) RUN 1: PERFORATE INTERVAL: 11149' - 11158' (11140' - 11149' REF DEPTH) W/ 2 7/8" GEO RAZOR RUN 2: UNABLE TO GET THROUGH TREE W/ 3.50" CIBP. PUMP METHANOL INTO WELL AND HEAT ON VALVE OVERNIGHT. ***JOB IN PROGRESS*** 9/22/2025 ***JOB CONTINUED FROM 21-SEP-2025*** RIH W/ 3.5" GAUGE RING TO 350', NO ISSUES SET 3.5' CIBP AT 11170.0' (11161' REF DEPTH) ***JOB COMPLETE*** Daily Report of Well Operations PBU A-25B 7. Property Designation (Lease Number): 1. Operations Performed: 2. Operator Name: 3. Address: 4. Well Class Before Work:5. Permit to Drill Number: 6. API Number: 8. Well Name and Number: 9. Logs (List logs and submit electronic data per 20AAC25.071): 10. Field/Pool(s): Susp Well Insp Install Whipstock Mod Artificial Lift Perforate New Pool Perforate Plug Perforations Coiled Tubing Ops Other Stimulate Fracture Stimulate Alter Casing Pull Tubing Repair Well Other: Change Approved Program Operations shutdown 11. Present Well Condition Summary: Casing Length Size MD TVD Burst Collapse Exploratory Stratigraphic Development Service 14. Attachments (required per 20 AAC 25.070, 25.071, & 25.283) 16. Well Status after work: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. OIL GAS WINJ WAG GINJ WDSPL GSTOR Suspended SPLUG Authorized Name and Digital Signature with Date: Authorized Title: Contact Name: Contact Email: Contact Phone: PBU A-25B Hilcorp North Slope, LLC 3800 Centerpoint Dr, Suite 1400, Anchorage, AK 99503 211-003 50-029-20764-02-00 11610 Conductor Surface Intermediate Liner Liner 9185 80 3113 8141 2931 782 11211 20 13-3/8" 9-5/8" 7" 4-1/2" 8796 40 - 120 39 - 3152 38 - 8179 8052 - 10983 10826 - 11608 40 - 120 39 - 2772 38 - 6061 5980 - 8573 8419 - 9184 None 2670 4760 5410 7500 11211 4930 6870 7240 8430 11179 - 11286 4-1/2" 12.6# 13cr85 36 - 10834 8765 - 8870 Structural 4-1/2" HES TNT Packer 10710 8305 Torin Roschinger Operations Manager Leif Knatterud leif.knatterud@hilcorp.com 907-564-4667 PRUDHOE BAY, PRUDHOE OIL Total Depth Effective Depth measured true vertical feet feet feet feet measured true vertical measured measured feet feet feet feet measured true vertical Plugs Junk Packer Measured depth True Vertical depth feet feet Perforation depth Tubing (size, grade, measured and true vertical depth) Packers and SSSV (type, measured and true vertical depth) 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: 13a.Representative Daily Average Production or Injection Data Oil -Bbl Gas-Mcf Water -Bbl Casing Pressure Tubing Pressure Prior to well operation: Subsequent to operation: 15. Well Class after work: Exploratory Development Service StratigraphicDaily Report of Well Operations Copies of Logs and Surveys Run Electronic Fracture Stimulation Data Sundry Number or N/A if C.O. Exempt: ADL 0028286 36 - 8427 N/A N/A 314 768 41249 53729 1054 0 1893 300 1076 1020 N/A 13b. Pools active after work:PRUDHOE OIL No SSSV Installed 10710, 8305 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION REPORT OF SUNDRY WELL OPERATIONS Sr Pet Eng: Sr Pet Geo: Form 10-404 Revised 10/2022 Submit in PDF format to aogcc.permitting@alaska.gov Sr Res Eng: Due Within 30 days of Operations By Grace Christianson at 9:45 am, Aug 12, 2025 Digitally signed by Torin Roschinger (4662) DN: cn=Torin Roschinger (4662) Date: 2025.08.12 06:02:52 - 08'00' Torin Roschinger (4662) DSR-9/11/25JJL 9/5/25 RBDMS JSB 081425 ACTIVITY DATE SUMMARY 7/25/2025 ****WELL SHUT IN ON ARRIVAL *** (SET PLUG IN ZONE/ ADPERF) MIRU YELLOW JACKET E-LINE PT PCE 300 PSI LOW 3000 PSI HIGH, CORRELATE TO SLB JEWERLY LOG CCL/GR DATED 7 OCT 2011 SET 3.5" CIBP PLUG SETTING DEPTH 11220' (11211' REF DEPTH), CCL TO MID ELEMENT 12.6' CCL STOP DEPTH = 11207.4', TAG AFTER SET PLUG. PERFORATE INTERVAL 11188' - 11198' (11179 - 11189' REF DEPTH) WITH 2 3/4" 6SPF 60PHASE HSC W/ GEO RAZOR CHARGES CCL TO TOP SHOT 7.5' CCL STOP DEPTH = 11180.5', CONFIRM SHOTS FIRED RDMO YELLOW JACKET ELINE *** WELL SHUT IN ON DEPARTURE *** Daily Report of Well Operations PBU A-25B 7. Property Designation (Lease Number): 1. Operations Performed: 2. Operator Name: 3. Address: 4. Well Class Before Work:5. Permit to Drill Number: 6. API Number: 8. Well Name and Number: 9. Logs (List logs and submit electronic data per 20AAC25.071): 10. Field/Pool(s): Susp Well Insp Install Whipstock Mod Artificial Lift Perforate New Pool Perforate Plug Perforations Coiled Tubing Ops Other Stimulate Fracture Stimulate Alter Casing Pull Tubing Repair Well Other: Change Approved Program Operations shutdown 11. Present Well Condition Summary: Casing Length Size MD TVD Burst Collapse Exploratory Stratigraphic Development Service 14. Attachments (required per 20 AAC 25.070, 25.071, & 25.283) 16. Well Status after work: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. OIL GAS WINJ WAG GINJ WDSPL GSTOR Suspended SPLUG Authorized Name and Digital Signature with Date: Authorized Title: Contact Name: Contact Email: Contact Phone: PBU A-25B Hilcorp North Slope, LLC 3800 Centerpoint Dr, Suite 1400, Anchorage, AK 99503 211-003 50-029-20764-02-00 11610 Conductor Surface Intermediate Liner Liner 9185 80 3113 8141 2931 782 11520 20 13-3/8" 9-5/8" 7" 4-1/2" 9097 40 - 120 39 - 3152 38 - 8179 8052 - 10983 10826 - 11608 40 - 120 39 - 2772 38 - 6061 5980 - 8573 8419 - 9184 None 2670 4760 5410 7500 None 4930 6870 7240 8430 11271 - 11286 4-1/2" 12.6# 13cr85 36 - 10834 8855 - 8870 Structural 4-1/2" HES TNT Packer 10710 8305 Torin Roschinger Operations Manager Leif Knatterud leif.knatterud@hilcorp.com 907-564-4667 PRUDHOE BAY, PRUDHOE OIL Total Depth Effective Depth measured true vertical feet feet feet feet measured true vertical measured measured feet feet feet feet measured true vertical Plugs Junk Packer Measured depth True Vertical depth feet feet Perforation depth Tubing (size, grade, measured and true vertical depth) Packers and SSSV (type, measured and true vertical depth) 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: 13a.Representative Daily Average Production or Injection Data Oil -Bbl Gas-Mcf Water -Bbl Casing Pressure Tubing Pressure Prior to well operation: Subsequent to operation: 15. Well Class after work: Exploratory Development Service StratigraphicDaily Report of Well Operations Copies of Logs and Surveys Run Electronic Fracture Stimulation Data Sundry Number or N/A if C.O. Exempt: ADL 0028286 36 - 8427 N/A N/A 291 314 36061 41249 1004 1054 1954 1893 1121 1076 N/A 13b. Pools active after work:PRUDHOE OIL No SSSV Installed 10710, 8305 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION REPORT OF SUNDRY WELL OPERATIONS Sr Pet Eng: Sr Pet Geo: Form 10-404 Revised 10/2022 Submit in PDF format to aogcc.permitting@alaska.gov Sr Res Eng: Due Within 30 days of Operations By Grace Christianson at 9:09 am, Jul 10, 2025 Digitally signed by Torin Roschinger (4662) DN: cn=Torin Roschinger (4662) Date: 2025.07.09 19:47:16 - 08'00' Torin Roschinger (4662) JJL 7/21/25 RBDMS JSB 071025 DSR-7/21/25 ACTIVITY DATE SUMMARY 6/23/2025 **** WELL S/I ON ARRIVAL **** DRIFTED TBG W/ 3.75" GAUGE RING TAGGED 3.725" XN NIP @ 10,821' MD. **** WSR CONT ON 6-24-2025 **** 6/24/2025 **** WSR CONT FROM 6-23-2025 **** BAILED FORMATION SAND 11,280' MD TO 11,297' MD WSR CONT ON 6-25-22025. ** CONDUCT WELL CONTROL DRILL W/ CREW SOP FOR PACKING BLOW-OUT ** 6/25/2025 **** WSR CONT FROM 6-24-2025 **** BAILED FORMATION SAND FROM PERFS @ 11,295' TO 11,303' MD DRIFTED TBG W/ 3.62" GAUGE RING TO 11,303' MD. ****JOB IN PROGRESS, WSR CONT ON 6-26-2025 **** 6/26/2025 **** WSR CONT FROM 6-26-2025 **** RAN 10' x 3" PUMP BAILER TO 11,303' MD. RECOVERED 2 CUPS OF FINE SAND/CLAY. RAN 2.5" SAMPLE BAILER TO 11,303' MD. CAME BACK EMPTY. TAGGED XN NIPPLE @ 10,821' MD (10,817' SLM). ***JOB COMPLETE. WELL LEFT S/I ON DEPARTURE*** 7/1/2025 ***WELL S/I ON ARRIVAL*** (ADPERF) RIG UP YJ ELINE. PT PCE 300 PSI LOW /3000 PSI HIGH, FUNCITON WLVS PERFORATE INTERVAL WITH 2 7/8''GEO RAZOR 6spf 60 DEG PHASE (.39" EHD 37.45" TTP) INTERVEAL CHANGED TO 11288' TO 11293', (11281'-11286' REFERENCE DEPTHS) = 5 FEET INTERVAL. CCL TO TOP SHOT= 8.5' CCL STOP DEPTH= 11279.5' CONFIRM SHOTS FIRED. RDMO YJ ELINE *** WELL S/I ON DEPARTURE*** JOB COMPLETE Daily Report of Well Operations PBU A-25B • 0 Image Project Well History File Cover Page XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. 0.1 1 - 0 Q3 Well History File Identifier Organizing(done) ❑ Two-sided III IIIIII IlU IIIII ❑ Rescan Needed I 11 IIIIU 111111 RESCAN DIGITAL DATA OVERSIZED (Scannable) /Color Items: ❑ Diskettes, No. ❑ Maps: reyscale Items: ❑ Other, No/Type: ❑ Other Items Scannable by a Large Scanner ❑ Poor Quality Originals: OVERSIZED (Non-Scannable) ❑ Other: ❑ Logs of various kinds: NOTES: ❑ Other:: AIM-� -- ///27//BY: Date: 3 /s/ le Project Proofing 1111E111111 I BY: Cita) Date: I ' a /3 /s/ iP Scanning Preparation a. x 30 = (pO + �,c.,4D = TOTAL PAGES v 6 g /3 (Count does not include cover sheet) „/�/) BY: Maria Date: " a /s/ r r �� 7 Production Scanning IU DL1111111 II III Stage 1 Page Count from Scanned File: T7 (Count does include cover sheet) Page Count Matches Number in Scanning Preparation: L ' ES NO BY: delp Date: ' 10,7p 3 Is! mp Stage 1 If NO in stage 1, page(s)discrepancies were found: YES NO BY: Maria Date: /s/ Scanning is complete at this point unless rescanning is required. II 111111111111111 ReScanned I 11111111111M BY: Maria Date: /s/ Comments about this file: Quality Checked H1111111111111 12/22/2011 Well History File Cover Page.doc DATA SUBMITTAL COMPLIANCE REPORT 4116/2013 Permit to Drill 2110030 Well Name/No. PRUDHOE BAY UNIT A-25B Operator BP EXPLORATION(ALASKA)INC API No. 50-029-20764-02-00 MD 11610 ND 9185 Completion Date 10/8/2011 Completion Status 1-OIL Current Status 1-OIL UIC N REQUIRED INFORMATION Mud Log No Samples No Directional Surve e DATA INFORMATION Types Electric or Other Logs Run: GR/RES/PWD, GR/RES/DEN/NEU/USIT (data taken from Logs Portion of Master Well Data Maint Well Log Information: Log/ Electr Data Digital Dataset Log Log Run Interval OH/ Type M /Frmt Number Name Scale Media No Start Stop CH Received Comments Log Cement Evaluation 15 Col 8442 11015 Open 9/27/2011 MD BAT Bi-Modal Acoustic BAT Cement Log Log Induction/Resistivity 25 Col 8179 11610 Open 9/27/2011 MD BAT Bi-Modal Acoustic DGR Dual Gamma Ray EWR-Phase 4 ALD Azimuthal Lithodensity CTN Compensated Thermal Neutron Log Induction/Resistivity 25 Col 8179 11610 Open 9/27/2011 MD DGR Dual Gamma Ray EWR Electromargnetic Wave Resistivity Phase 4 ALD Azimuthal Lithodensity CTN Compensated Thermal Neutron Log Induction/Resistivity 25 Col 6061 9185 Open 9/27/2011 TVD BAT Bi-Modal Acoustic DGR Dual • Gamma Ray EWR-Phase 4 ALD Azimuthal Lithodensity CTN Compensated Thermal Neutron Log / Induction/Resistivity 25 Col 6061 9185 Open 9/27/2011 ND DGR Dual Gamma Ray EWR Electromargnetic Wave Resistivity Phase 4 ALD Azimuthal Lithodensity CTN Compensated Thermal Neutron ED(/'C Lis 14929 Induction/Resistivity 8159 11527 Open 9/27/2011 OH LIS data+Graphics pdf,cgm,ver,emf,tiff DATA SUBMITTAL COMPLIANCE REPORT 4/16/2013 Permit to Drill 2110030 Well Name/No. PRUDHOE BAY UNIT A-25B Operator BP EXPLORATION(ALASKA)INC API No. 50-029-20764-02-00 MD 11610 TVD 9185 Completion Date 10/8/2011 Completion Status 1-OIL Current Status 1-OIL UIC N Log t„,.. Cement Evaluation 5 Col 9400 10820 Case 10/13/2011 MD Ultra Sonic Imaging Tool CCUGR/USIT ED C Pds 21189 Cement Evaluation 9400 10820 Case 10/13/2011 Ultra Sonic Imaging Tool CCUGR/USIT Log Cement Evaluation 5 Col 10760 11346 Case 10/13/2011 Slim Cement Mapping Tool ED/ C Pds 21198 Cement Evaluation 10760 11346 Case 10/13/2011 Slim Cement Mapping Tool Well Cores/Samples Information: III Sample Interval Set Name Start Stop Sent Received Number Comments ADDITIONAL INFORMATION Well Cored? Y sk) Daily History Received? CDN Chips Received? .--Y-7.-N-. ri Formation Tops 6 N N p Analysis '•T '-'. Received? Comments: Compliance Reviewed By: Date: 10lr8 / K y 0 STATE OF ALASKA ALAS OIL AND GAS CONSERVATION COM ISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG la. Well Status: IN Oil ❑Gas ❑SPLUG ❑Other ❑Abandoned ❑Suspended 1b. Well Class: 20AwC 25.105 20AAC 25.110 ® Development ❑Exploratory ❑GINJ ❑WINJ ❑WAG ❑WDSPL ❑Other No.of Completions One ❑ Service ❑Stratigraphic 2. Operator Name: 5.Date Comp.,Susp.,or Abend.: 12. Permit to Drill Number: BP Exploration(Alaska)Inc. 10/8/2011 211-003 3. Address: 6.Date Spudded: 13. API Number: P.O. Box 196612,Anchorage,Alaska 99519-6612 7/25/2011 50-029-20764-02-00 4a. Location of Well(Governmental Section): 7.Date T.D.Reached: 14. Well Name and Number: Surface: 8/2/2011 PBU A-25B 2652'FNL, 1703'FEL, Sec.35,T11N,R13E, UM 8. KB(ft above MSL): 90,32 15.Field/Pool(s): Top of Productive Horizon: 2382'FSL, 1168'FWL,Sec.25,T11N,R13E,UM GL(ft above MSL): 51.93' Prudhoe Bay Field/Prudhoe Bay Total Depth: 9.Plug Back Depth(MD+TVD): Oil Pool 2478'FSL, 1111 FWL,Sec.25,T11N, R13E, UM 11520' 9098' 4b. Location of Well(State Base Plane Coordinates,NAD 27): 10.Total Depth(MD+TVD): 16. Property Designation: Surface: x- 653697 y- 5947780 Zone- ASP4 11610' 9185' ADL 028286 TPI: x- 656461 y- 5952872 Zone- ASP4 11.SSSV Depth(MD+TVD): 17. Land Use Permit: Total Depth:x- 656401 y- 5952966 Zone- ASP4 None 18.Directional Survey: ■ Yes ❑No 19.Water depth,if offshore: 20. Thickness of Permafrost(ND): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1900'(Approx.) 21.Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): 22. Re-Drill/Lateral Top Window MD/ VD: GR/RES/PWD, GR/RES/DEN/NEU, USIT 8179' 6061' 23. CASING,LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVO HOLE AMOUNT CASING WT.PER FT. GRADE Top BOTTOM ToP BOTTOM SIZE CEMENTING RECORD PULLED " • _ • 1" 1° 1- _1- o•. ate •ice• _ Cr- 11 _I• :. 1 M .• _ _1 9-5/8" WI L-80 Surface Surface 6061' 1610 cu ft Class'G' 4-1/2" 12.6# 13Cr85 10826' 11608' 8419' 9183' 6-1/8" 140 cu ft Class'G' 24. Open to production or injection? ®Yes ❑No 25. TUBING RECORD If Yes,list each interval open SIZE DEPTH SET(MD) PACKER SET(MD/TVD) (MD+TVD of Top&Bottom;Perforation Size and Number): 3-3/8"Gun Diameter,6 spf 4-1/2", 12.6#, 13Cr85 10834' 10710'/8305' MD ND MD ND 11280'-11285' 8864'-8869' 26. ACID,FRACTURE,CEMENT SQUEEZE,ETC. LGi" i °Jt$,. DEPTH INTERVAL(MD)I AMOUNT AND KIND OF MATERIAL USED 1_ t 2000' Freeze Protect w/138 Bbls of Diesel 1(0. . li I !Lit 6 f • 27. PRODUCTION TEST Date First Production: Method of Operation(Flowing,Gas Lift,etc.): Not on Production Yet N/A Date of Test: Hours Tested: Production For OIL-BBL: GAS-MCF: WATER-BBL: CHOKE SIZE: GAS-OIL RATIO: Test Period 4 Flow Tubing Casing Press: Calculated OIL-BBL: GAS-MCF: WATER-BBL: OIL GRAVITY-API(CORR): Press. 24-Hour Rate 28. CORE DATA Conventional Core(s)Acquired? ❑Yes IN No Sidewall Core(s)Acquired? ❑Yes ®No If Yes to either question,list formations and intervals cored(MD+TVD of top and bottom of each),and summarize lithology and presence of oil,gas or water (submit separate sheets with this form,if needed). Submit detailed descriptions,core chips,photographs and laboratory analytical results per 20 MC 250.071. None R$DMS NOV 0 4 2011 k/( ''1 /,5) 1 R " 1 Form 10-407 Revised 12/2009 CONTINUED ON REVERSE (K0� Submit Original Only de ins a O Gar Cons.Commission 29. GEOLOGIC MARKERS(List all formations an(irkers encountered): 30. • FORMATION TESTS NAME MD ND Well Tested? ❑Yes ®No Permafrost Top If yes,list intervals and formations tested,briefly summarizing test Permafrost Base results. Attach separate sheets to this form,if needed,and submit detailed test information per 20 AAC 25.071. Sag River 10984' 8574' None Shublik A 11015 8604' Shublik B 11052' 8641' Shublik C 11070' 8658' Sadlerochit 11100' 8688' 45SB 11143' 8730' 42SB/Zone 4A 11218' 8803' Top CGL/Zone 3 11306' 8889' Base CGL/Zone 2C 11410' 8990' 22TS 11500' 9078' Formation at Total Depth(Name): 22TS 11500' _ 9078' 31.List of Attachments: Summary of Daily Drilling Reports,Well Schematic Diagram,Surveys 32.I hereby certify that the foregoing is true and correct to the best of my knowledge. / 44/1/ e 11/ /�!Signed: Terrie Hubble V 04.K Title: Drilling Technologist Date: PBU A-25B 211-003 Prepared By Name/Number. Terrie Hubble,564-4628 Well Number Permit No./Approval No. Drilling Engineer: Jesse Rosenbaum, 564-5155 INSTRUCTIONS General: This form is designed for submitting a complete and correct well completion report and log on all types of lands and leases in Alaska. Submit a well schematic diagram with each 10-407 well completion report and 10-404 well sundry report when the downhole well design is changed. Item 1 a: Classification of Service Wells: Gas Injection,Water Injection,Water-Alternating-Gas Injection,Salt Water Disposal,Water Supply for Injection, Observation,or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI(Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level elevation in feet above mean sea level. Use same as reference for depth measurements given in other spaces on this form and in any attachments. Item 13: The API number reported to AOGCC must be 14 digits(ex: 50-029-20123-00-00). Item 20: Report true vertical thickness of permafrost in Box 20. Provide MD and ND for the top and base of permafrost in Box 28. Item 23: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 24: If this well is completed for separate production from more than one interval(multiple completion),so state in item 1,and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). Item 27: Method of Operation: Flowing,Gas Lift,Rod Pump,Hydraulic Pump,Submersible,Water Injection,Gas Injection,Shut-In,or Other(explain). Item 28: Provide a listing of intervals cored and the corresponding formations,and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. Item 30: Provide a listing of intervals tested and the corresponding formation,and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 12/2009 Submit Original Only I • BP AMERICA Leak-Off Test Summary Well Name: A-25B Surface Leak Off Test Test Test Depth Test Depth AMW Pressure Pressure EMW Date Type (TMD-Ft) (TVD-Ft) (ppg) (psi) (BHP) (psi) (ppg) 07/23/11 LOT 8,188.00 6,066.00 9.90 940.00 4,059.70 12.88 Page 1 of 1 I • North America-ALASKA- BP Page 1 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI. 500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 7/14/2011 00:00 - 12:00 12.00 MOB P PRE FINISH SECURING LINES IN DERRICK AFTER LAYING DOWN.SKID PIPE SHED COMPLEX AWAY FROM SUB IN PREPARATION FOR RIG MOVE.CONT MAINTENANCE ITEMS- WELDING LAYDOWN MACHINE STABILIZER AND PIT TO SUB WEATHER STRIPPING. 12:00 - 20:00 8.00 MOB P PRE COMPLETE RIG MAINTENANCE ITEMS AND PREP CASING SHED COMPLEX AND PIPE SHED COMPLEX FOR RIG MOVE. LOWER SUSPENSION AND PIN IN PLACE. 20:00 - 00:00 4.00 MOB P PRE PJSM.HOOK UP PEAK SOWS TO CASING AND PIPE SHED MODULES.BEGIN RIG MOVE FROM K PAD TOA PAD. 7/15/2011 00:00 - 12:00 12.00 MOB P c. PRE USE PEAK SOWS TO MOVE TWO MODULES AT A TIME FROM K PAD TO A PAD.SPOT ALL SIX MODULES IN STAGING AREA ON A PAD. P 12:00 20:00 8.00 MOB PRE I CONTINUE MOVING MODULES TO STAGING AREA ON A PAD. 20:00 - 00:00 4.00 MOB P PRE ALL MODULES AT A PAD.SPOT PUMP, PITS, AND POWER COMPLEXES NEXT TO WELL A-25. BEGIN LAYING RIG MATS AROUND WELLHOUSE IN PREPARATION FOR MOVING THE SUB OVER THE WELL. 7/16/2011 100:00 - 04:00 4.09— MOB P PRE CONTINUE LAYING RIG MATS IN PREPARATION FOR THE DRILLING SUB. 04:00 - 05:00 1.06 RIGU P PRE MOVE DRILLING SUB OVER RIG MATS TO WELL A-25. 05:00 07:30 2.50 RIM), N RREP , PRE HYDRAULIC LINE FAILURE ON MOVING SYSTEM OF THE RIG SUB COMPLEX.CLEAN UP HYDRAULIC FUILD AND REPAIR HOSE. 07:30 - 11:00 3.50 RIGtl - -'P PRE CONTINUE MOVING SUB AND SPOT OVER WELL A-25. 11:00 - 16:00 5.00 RIGU P { PRE USE STOMPERS TO MANEUVER PIPE SHED COMPLEX IN POSITION NEXT TO SUB. SIMOPS:MOVE RIG MATS WITH LOADER TO PREP FOR SPOTTING OTHER MODULES. 16:00 - 20:00 4.00 RIGU P PRE MOVE CASING SHED COMPLEX AND SPOT INTO POSITION NEXT TO DRILL PIPE COMPLEX. 20:00 - 00:00 4.00 RIGU P PRE PJSM.RAISE DERRICK AND SKID RIG FLOOR. INSTALL HANDRAILS AND LOWER STAIRWAYS ON CSG SHED AND SUB. 7/17/2011 00:00 - 12:00 12.00 RIGU P PRE SHIM SUB,PIPE SHED,AND CASING SHED MODULES.SPOT AND SHIM PITS,PUMP,AND POWER COMPLEXES.R/U LINES, RAISE CATTLE CHUTE AND SECURE. SPOT 500 BBLS BLEED DOWN TANK,CHOKE SKID,AND HARDLINE. 12:00 - 21:30 9.50 RIGU P PRE TAKE UP SLACK ON DRLG LINE,UNPIN TOPDRIVE FROM DERRICK,R/U BRIDAL LINES,AND PERFORM DERRICK INSPECTION.SCOPE DERRICK UP,R/D BRIDAL LINES,AND LOWER C-SECTION.R/U AND INSTALL UPPER CATTLE CHUTE. Printed 9/6/2011 9:11:50AM North America-ALASKA- BP Page 2 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date: 8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM I Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B©90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 21:30 - 22:30 1.00 RIGU P PRE -TAKE ON 8.5 PPG SEAWATER TO THE MUD PITS. -INSTALL C-SECTION CUSHIONS AND LOWER INTO PLACE RIG ACCEPT 21:30 HRS ON 7/17/2011. 22:30 - 00:00 1.50 RIGU P PRE -RU AND PRESSURE TEST OA VALVE TO 500 PSI FOR 5 MIN.GOOD TEST. -INSTALL 2ND WORKING VALVE ON OA. -RU FOR PRESSURE TESTING IA AND OA. 7/18/2011 00:00 - 04:30 4.50 RIGU P PRE FINISH RIGGING UP LINES TO WELLHEAD TO PERFORM MIT USING INJECTION PUMP. MIT OA TO 250 PSI FOR 5 MIN AND 2000 PSI FOR 30 MIN-TEST PASSED-WTL APPROVAL TO CONTINUE OPERATIONS -6.4 BBLS TO REACH TEST PRESSURE -LOST 50 PSI IN FIRST 15 MIN -LOST 15 PSI IN SECOND 15 MIN -6.4 BBLS RETURNED MIT T X IA TO 250 PSI FOR 5 MIN AND 20Q0 PSI FOR 30 MIN-TEST PASSED-WTL APPROVAL TO CONTINUE OPERATIONS -7.2 BBLS TO REACH TEST PRESSURE _--LOST 42 PSI IN FIRST 15 MIN LOST 14 PSI IN SECOND 15 MIN -7.2 BBLS RETURNED 04:30 - 05:00 0.50. RIGU, . °I? PRE R/D TEST EQUIPMENT AND BLOW DOWN LINES. 05:00 - 05:30 0.50 RIGI) P i PRE R/U LONG BAILS AND CALIBRATE BLOCK HEIGHT.ACTIVATE ZONE MANAGEMENT. 05:30 - 06:30 1.00 WHSUR 'P DECOMP PJSM.PICK UP LUBRICATOR TO RIG FLOOR. -R/U AND TEST TO 250 PSI FOR 5 MIN AND 3500 PSI FOR 5 MIN.GOOD TEST. -PULL BPV -R/D LUBRICATOR 06:30 - 07:00 0.50 WHSUR P DECOMP R/U TO DISPACE FREEZE PROTECT FROM WELL. 07:00 - 08:00 1.00 WHSUR P DECOMP TEST EMERGENCY SHUTDOWN SYSTEM ON RIG. -SYSTEM FUNCTIONED PROPERLY 08:00 - 10:00 2.00 WHSUR P DECOMP PJSM FOR DISPLACING FREEZE PROTECT. -PUMP 62 BBLS 8.4 PPG SEAWATER DOWN IA AND DISPLACE FREEZE PROTECT TO 500 BBL OPEN TOP TANK. -R/U AND PUMP 205 BBLS SEAWATER DOWN TUBING,TAKING RETURNS TO OPEN TOP TANK. -34 BBLS OF DIESEL RETURNED FROM TBG, 118 BBLS OF DIESEL RETURNED FROM IA. -TOTAL VOLUME PUMPED 267 BBLS,TOTAL VOLUME RETURNED 267 BBLS. -MONITOR WELL FOR 10 MIN-STATIC. 10:00 - 12:00 2.00 WHSUR P DECOMP DRY ROD IN TWC AND TEST FROM ABOVE TO 250 PSI LOW/3500 PSI HIGH FOR 5 MIN- GOOD TEST.TEST FROM BELOW TO 250 PSI LOW/2000 PSI HIGH FOR 5 MIN-GOOD TEST. -R/D TEST EQUIPMENT AND B/D LINES. 12:00 - 18:00 6.00 WHSUR P DECOMP RID CIRC LINES,VALVES,AND FITTINGS. NIPPLE DOWN TREE AND ADAPTER FLANGE. UD TREE IN 4 PIECES. Printed 9/6/2011 9:11:50AM North America-ALASKA- BP Page 3 of 19 • Operation Summary Report Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) I Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM I Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs I Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 18:00 - 00:00 6.00 BOPSUR ' P DECOMP PJSM.BEGIN NU BOPE.P/U 1.5',2',AND 14' HIGH PRESSURE RISER SECTIONS TO RIG FLOOR UP BEAVER SLIDE. N/U HIGH PRESSURE RISER SECTIONS.R/U CHOKE HOSE,MOVE FLOW LINE BOX,BELL NIPPLE, ,AND STACK INTO PLACE. 7/19/2011 00:00 - 04:00 4.00 BOPSUR P DECOMP NIPPLE UP BOPE,TORQUE ALL FLANGES ON HIGH PRESSURE RISER. R/U FOR BOP TEST. • OPEN BOP DOORS AND PERFORM VISUAL INSPECTION OF PIPE RAMS AND ANNULAR ELEMENTS AS PER SOP FOR HIGH GOR WELLS.CLOSE DOORS. INSPECTION WITNESSED BY BP WSL GARRETNSTAUDINGER AND TOURPUSHER /- JOHN NEWMAN. 04:00 - 04:30 0.50 BOPSUR P DECOMP RIG UP TO TEST BOPE. — 04:30 - 05:00 0.50 BOPSUR ., P DECOMP PERFORM KICK WHILE DRILLING DRILL(D2). 05:00 - 09:30 4.50 BOPSUR `, P DECOMP I TEST BOPE TO 250 PSI LOW,3500 PSI HIGH AS PER AOGCC AND BP POLICY.TEST ANNULAR PREVENTER TO 250 PSI LOW,3500 PSI HIGH.EACH TEST 5 CHARTED MINUTES. TEST THE UPPER VARIABLES AND LOWER VARIABLES WITH 4 IN AND 4 1/2 IN TEST JOINTS.TEST THE ANNULAR PREVENTER WITH 4 IN TEST JOINT.NO FAILED TESTS. TEST WITNESS WAIVED BY JOHN CRISP WITH AOGCC.TEST WITNESSED BY WSL MIKE DINGER AND TOOLPUSHER MIKE MEADOWS. PERFORMED ACCUMULATOR TEST:SYSTEM PRESSURE 3,000 PSI,PRESSURE AFTER CLOSING ALL RAMS AND ANNULAR . PREVENTER 1,775 PSI.RECOVERED 1ST 200 PSI-35 SECONDS.6 NITROGEN BOTTLES, AVERAGE PRESSURE=2,450-PSI. CLOSING TIMES: -ANNULAR PREVENTER:23 SEC. -TOP RAMS: 18 SEC. -BOTTOM RAMS: 16 SEC. -BLIND SHEARS: 16 SEC. -HCR KILL:2 SEC. -HCR CHOKE:2 SEC. 09:30 - 10:00 0.50 BOPSUR P DECOMP OPEN BLIND RAM DOORS AND INSPECT CONDITION OF RAM SEALS-SEALS GOOD. 10:00 - 10:30 0.50 BOPSUR P DECOMP TEST BLIND RAMS TO 250 PSI LOW,3500 PSI HIGH FOR 5 MIN. 10:30 - 12:00 1.50 WHSUR P DECOMP PICK UP DUTCH RISER, DSM LUBRICATOR, AND M(U TWC RETRIEVING TOOL TO LUBRICATOR. 12:00 - 14:30 2.50 WHSUR P DECOMP TEST LUBRICATOR TO 250 PSI LOW,3500 PSI HIGH FOR 5 CHARTED MINUTES EACH- PASS.PULL TWC,MONITOR WELL-STATIC. L/D LUBRICATOR AND DUTCH RISER. Printed 9/6/2011 9:11:50AM North America-ALASKA- BP Page 4 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay ' Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. 1 UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 14:30 - 18:00 3.50 PULL P DECOMP M/U LANDING JOINT W/FOSV.RIH AND M/U TO TBG HANGER W/7 TURNS TO RIGHT. -PULL TBG HANGER FREE AT 69K UP, NO OVERPULL. -MONITOR WELL FOR 10 MIN-STATIC -PULL HANGER ABOVE ROTARY TABLE AND UD HANGER AND LANDING JOINT. R/U CIRC HOSES TO TAKE RETURNS FROM IA TO 500 BBL OPEN TOP TANK,M/U CEMENT HOSE ON STUMP,CLOSE ANNULAR. 18:00 - 19:00 1.00 PULL P , DECOMP CIRCULATE LONG WAY AT 250 GPM/450 PSI, TAKING RETURNS TO OPEN TOP TANK. PUMP 40 BBL SOAP PILL AND CHASE WITH 305 BBLS SEAWATER. -MW 8.4+IN/8.4+OUT -MONITOR WELL FOR 10 MIN-STATIC 19:00 - 20:00 1.00 PULL P DECOMP RIG DOWN CIRC LINES,CLEAR AND CLEAN 1 RIG FLOOR. 20:00 - 00:00 4.00 PULL P DECOMP PJSM.LAY DOWN 4.5",12.6#,L-80 TBG FROM 3311'TO 320'.HOLE TAKING PROPER FILL. 7/20/2011 00:00 - 01:00 1.00 PULL ,_P I DECOMP LAY DOWN 4.5", 12.6#, L-80 TBG. -TOTAL OF 79 JOINTS,1 PUP,AND 1 WLEG LAYED DOWN. 01:00 - 02:30 1.50 PULL P DECOMP R/D 4-1/2"HANDLING EQUIPMENT. -R/D LONG BAILS 02:30 - 03:30 1.00 CLEAN P WEXIT R/U TO RUN CLEANOUT BHA. -R/U SHORT BAILS AND POWER ELVATORS -P/U CLEANOUT TOOLS TO RIG FLOOR l I -LOAD PIPE SHED W/4"HWDP,5"HWDP, AND 6-1/2"DCS 03:30 - 04:00 0.50 BOPSUR P WEXIT INSTALL WEAR BUSHING. 04:00 - 07:30 3.50 CLEAN P WEXIT PJSM.M/U CLEANOUT BHA AS PER BOT REP. -8-1/2"USED MILL TOOTH BIT,BOOT BASKETS(2),WATERMELON MILL,DRILL COLLARS,5"HWDP,4"HWDP. 07:30 - 08:30 1.00 CLEAN N RREP WEXIT CALIBRATE THRESHHOLD FOR LINK TILT TO ENABLE TOP DRIVE ZONE MANAGEMENT SYSTEM. 08:30 - 09:30 1.00 CLEAN P WEXIT CONTINUE M/U CLEANOUT BHA. 09:30 - 10:30 1.00 CLEAN P WEXIT HOLD H2S/RIG EVAC DRILL.SHUT WELL IN. PERFORM AAR. _ 10:30 - 11:00 0.50 CLEAN P WEXIT STRAP DRILLPIPE IN A&B TUBS TO BE PICKED UP.R/U TO CUT AND SLIP DRILL LINE. 11:00 - 14:00 3.00 CLEAN P WEXIT CUT AND SLIP 86'OF DRILL LINE,CALIBRATE BLOCK HEIGHT ON TOTCO&AMPHION SYSTEMS,CLEAR AND CLEAN RIG FLOOR. 14:00 - 00:00 10.00 CLEAN P WEXIT PJSM.RIH W/CLEANOUT ASSY ON DOUBLES FROM THE PIPESHED TO 7026'MD.FILL PIPE EVERY 20 STANDS AND STRAP DRILLPIPE WHILE RIH.HOLE GIVING PROPER DISPLACEMENT. -P/U=144K,S/O=119K 7/21/2011 00:00 - 02:00 2.00 CLEAN P WEXIT RIH WITH CLEANOUT ASSEMBLY ON DOUBLES FROM PIPESHED TO 7660'. -STRAP PIPE ON TRIP IN 02:00 - 03:30 1.50 CLEAN N RREP WEXIT CONTINUE TROUBLESHOOTING PIPE TUB CONVEYOR IN PIPESHED. Printed 9/6/2011 9:11:50AM North America -ALASKA- BP Page 5 of 19 • Operation Summary Report Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date: 8/9/2011 'X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time:11/16/2001 12:00:00AM 'Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase ! Description of Operations (hr) (ft) 03:30 - 04:00 0.50 CLEAN P WEXIT SERVICE TOP DRIVE,BLOCKS, DRAWWORKS,CATHEADS,AND IRON ROUGHNECK. 04:00 - 06:00 2.00 CLEAN P WEXIT CONTINUE RIH WITH CLEANOUT ASSEMBLY TO 8,227'MD. HOLE TAKING PROPER DISPLACEMENT. 06:00 - 07:30 1.50 CLEAN P WEXIT M/U TOPDRIVE.ROTATE AND RECIPROCATE 60'STROKES WHILE CIRCULATING 30 BBL 8.4 PPG HIGH VIS SOAP PILL.PUMP PILL AROUND TO SURFACE. CIRC AT 590 GPM/2,565 PSI I,07:30 - 08:30 1.00 CLEAN P WEXIT P/U DOUBLE FROM PIPESHED AND RIH TO 8,295'. -ROTATE AND RECIPROCATE 60'STROKES, CBU 590 GPM/2,250 PSI 08:30 - 09:00 0.50 CLEAN P WEXIT OBTAIN SLOW PUMP RATES -MONITOR WELL FOR 10 MIN-STATIC MW 8.5 IN/8.5 OUT 09:00 - 19:00 10.00 CLEAN P WEXIT POOH ON ELEVATORS TO 6,785'.MONITOR WELL FOR 10 MIN-STATIC.MW 8,5 IN/8.5 OUT.PUMP DRY JOB.CONTINUE POOH ON ELEVATORS TO BHA. -STAND BACK HWDP AND DRILL COLLARS -L/D BOOT BASKETS(EMPTY) -LID WATERMELON MILL-IN GAUGE 19:00 - 22:00 3.00, EVAL P WEXIT ,PJSM.R/U SLB ELINE -P/U EZSV,WIRELINE SHEAVES,AND TOOLS. -INSTALL SHEAVE IN ELEVATORS AND ON RIG FLOOR -P/U WIRELINE THROUGH WINDOW IN WALL, M/U TOOLSTRING 22:00 - 00:00 2.00 EVAL P WEXIT ,RIH WITH EZSV ON WIRELINE TO 8300'ELMD. STARTED MONITORING OA AT 22:30 HRS AS PER PACK-OFF CHANGE OUT SOP. 7/22/2011 00:00 - 01:00 1.00 EVAL P WEXIT TIE INTO GR/CCL OF A-25A PDC LOG.E-LINE DEPTH CORRECTION OF-22'. -SET EZSV AT 8,193'ELMD. -TAG TOP OF EZSV WITH WIRELINE TOOLS TO CONFIRM SET. 01:00 - 02:30 1.50 EVAL P WEXIT POH WITH WIRELINE TO SURFACE. 02:30 - 03:00 0.50 EVAL P WEXIT R/D WIRELINE SHEAVES AND TOOLS.R/U TO PRESSURE TEST CSG. 03:00 - 04:00 1.00 EVAL P WEXIT PRESSURE TEST 9-5/8 CSG AND EZSV TO 250 PSI FOR 5 MIN AND 3500 PSI FOR 30 MIN- TEST PASSED-WTL APPROVAL TO CONTINUE OPERATIONS -7.6 BBLS TO REACH TEST PRESSURE LOST 18 PSI IN FIRST 15 MIN -LOST 16 PSI IN SECOND 15 MIN -LOST 7 PSI IN THIRD 15 MIN -7.6 BBLS RETURNED 04:00 - 05:30 1.50 STWHIP P WEXIT PERFORM AAR ON WIRELINE.PJSM FOR WINDOW MILLING BHA.R/U TO P/U WHIPSTOCK ASSEMBLY. 05:30 - 10:30 5.00 STWHIP P WEXIT PJSM.M/U WHIPSTOCK BHA WITH MILLS, MWD,HWDP,AND DRILL COLLARS. Printed 9/6/2011 9:11:50AM North America -ALASKA- BP Page 6 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date: 8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI: 500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) 10:30 - 11:00 0.50 STWHIP P (ft) WEXIT SHALLOW PULSE TEST MWD @ 510 GPM/ 1200 PSI.GOOD DETECTION. 11:00 - 17:30 6.50 STWHIP P WEXIT CONTINUE RIH WITH WHIPSTOCK ASSEMBLY TO 8150'. HOLE GIVING PROPER DISPLACEMENT. 17:30 - 18:30 1.00 STWHIP P WEXIT M/U TOPDRIVE.OBTAIN SLOW PUMP RATES. -CIRC AT 510 GPM/2225 PSI, P/U=166K,S/O =129K ORIENT WHIPSTOCK FACE TO 47 DEG LOHS TAG EZSV AT 8200'MD. -SET BOTTOM TRIP ANCHOR WITH 12K DOWN -P/U 15K OVER TO CONFIRM SET -S/O 38K TO SHEAR OFF WHIPSTOCK jTOP OF WS SETAT 8179'MD _ 18:30 19:00 0.50 STWHIP P WEXIT STAND BACK 3 STANDS TO 7942'MD. 19:00 - 20:30 1.50 STWHIP P WEXIT R/U RTTS TO DRILLPIPE.RIH 1 STAND AND SET RTTS. -21 TURNS TO LEFT TO RELEASE FROM TOOL. 20:30 - 21:00 0.50 STWHIP P WEXIT PRESSURE TEST RTTS TO 250 PSI LOW/ 2000 PSI HIGH FOR 5 MIN EACH GOOD TEST 21:00 - 23:30 2.50 STWHIP P WEXIT I DRAIN STACK.R/U AND PULL WEAR RING. 123:30 - 00:00 0.50 STV'VHIP P WEXIT PULL 9-5/8"PACKOFF THROUGH STACK. -PULLED FREE WITH 21K OVERPULL. 7/23/2011 00:00 - 02:00 2.00 STWHIP P WEXIT INSTALL NEW 9-5/8"PACKOFF THROUGH STACK PER CAMERON REP. i -RUN IN AND TORQUE LDS -TEST PACK-OFF VOID TO 250 PSI LOW/5 MIN AND 3500 PSI HIGH/30 MIN GOOD TEST 02:00 - 03:00 1.00 STWHIP P WEXIT R/U RTTS PULLING TOOL AND RUN IN ON STAND. -INSTALL TIW ON DP -ENGAGE INTO RTTS WITH 21 TURNS TO RIGHT -CLOSE ANNULAR, RELEASE RTTS SLIPS AND ELEMENTS -0 PSI ON CHOKE,OPEN CHOKE AND VERIFY NO FLOW -OPEN ANNULAR,PULL RTTS 03:00 - 03:30 0.50 STWHIP P WEXIT L/D RTTS AND RUNNING TOOL. 1 03:30 - 08:30 5.00 STWHIP P WEXIT PJSM.RIH WITH 3 STANDS TO TOP OF WHIPSTOCK. DISPLACE 8.5 PPG SEAWATER TO 9.9 PPG LSND. -PUMP 30 BBLS SPACER,DISPLACE WELL @ 330 GPM/900 PSI.A LOT OF PARAFIN IN RETURNS. -MONITOR WELL FOR 10 MIN-STATIC.MW 9.9IN/9.9OUT -OBTAIN SLOW PUMP RATES Printed 9/6/2011 9:11:50AM North America-ALASKA- BP Page 7 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time:11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 1 08:30 - 18:00 9.50 STWHIP P WEXIT MILL WINDOW FROM 8179'TO 8196'AS PER BOT REP. -500 GPM/2150 PSI '-100 RPM/6-8K TQ -5-12K WOB -P/U 175K,S/O 135K TOW=8179' BOW=8196' ry HEAVY TAR AND PARAFIN BLINDING SHAKER P SCREENS CAUSING DELAYS DURING lj I 03 MILLING. 18:00 - 19:30 1.50 STWHIP P WEXIT QRILL 29'OF NEW FORMATION TO 8216'MD A. -500 GPM/2200 PSI ✓1 -100 RPM/5-7KTQ P/U CLEAN AND SLIDE THROUGH WINDOW WITH NO ISSUES 19:30 - 22:00 2.50 STWHIP P WEXIT PUMP 40 BBL SUPER SWEEP AND 1.5 BU @ 500 GPM/2200 PSI -NO INCREASE IN METAL CUTTINGS SEEN AT SURFACE -TOTAL METAL RECOVERED 300 LBS -MONITOR WELL-STATIC.MW 9.9 IN/9.9 OUT 22:00 - 23:30 1.50 STWHIP P WEXIT PJSM.PERFORM LOT TO 12.8 PPG EMW WITH 940 PSI AT 6066'TVD AND 9.9 PPG MW. -3.5 BBLS TO REACH LEAK OFF PRESSURE, 2 BBLS RETURNED 23:30 - 00:00 0.50 STWHIP P WEXIT R/D TEST EQUIPMENT WHILE MONITORING WELL-STATIC. 7/24/2011 00:00 - 05:00 5.00 STWHIP P WEXIT PJSM.PUMP DRY JOB.POOH ON ELEVATORS WITH WINDOW MILLING ASSEMBLY. -HOLE TAKING PROPER DISPLACEMENT. 05:00 - 09:00 4.00 STWHIP P WEXIT LAY DOWN MILLING BHA PER BAKER REP 09:00 - 10:00 1.00 STWHIP P WEXIT CLEAN AND CLEAR RIG FLOOR.LAY DOWN STRING MILLS AND PILOT MILLS. -ALL 3 STRING MILS IN GAUGE -WINDOW PILOT MILL 1/4"UNDER GAUGE 10:00 - 10:30 0.50 STWHIP P WEXIT SERVICE IRON DERRICKMAN,TOP DRIVE, AND BLOCKS. 10:30 - 11:00 0.50 STWHIP P WEXIT PULL WEAR RING. 11:00 - 12:30 1.50 STWHIP P WEXIT FLUSH OUT BOP STACK.FUNCTION RAMS AND FLUSH. 12:30 - 13:00 0.50 STWHIP P WEXIT INSTALL WEAR RING. 13:00 - 13:30 0.50 STWHIP P WEXIT PJSM FOR M/U DRILLING BHA AND PICKING UP REMAINING DOUBLE FROM PIPESHED. 13:30 - 17:30 4.00 STWHIP P WEXIT P/U BHA TO 112',UPLOAD BHA,SHALLOW PULSE TEST MWD @ 550 GPM/1030 PSI. CONTINUE M/U BHA TO 644'. 17:30 - 00:00 6.50 STWHIP P WEXIT RIH WITH DRILLING BHA ON DOUBLES FROM PIPESHED TO 3172' -STRAP DOUBLES ON TRIP IN -HOLE GIVING PROPER DISPLACEMENT 7/25/2011 00:00 - 03:00 3.00 STWHIP P WEXIT CONTINUE RIH WITH DRILLING BHA ON DOUBLES TO 4728'MD. -STRAP DOUBLES ON TRIP IN 03:00 - 06:30 3.50 STWHIP P WEXIT RIH WITH DRILLING BHA ON STANDS FROM DERRICK. -HOLE GIVING PROPER DISPLACEMENT Printed 9/6/2011 9:11:50AM North America -ALASKA- BP Page 8 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 `X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time:11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:30 - 08:00 1.50 STWHIP P WEXIT CBU.STAGE PUMPS TO 600 GPM AND OBTAIN ECD BASELINE. -600 GPM/3000 PSI -100 RPM/6KTQ -P/U 155K, S/O 127K,ROT 136K ORIENT 50L AND RIH CLEAN THROUGH WINDOW 08:00 - 12:00 4.00 DRILL P INT1 DIRECTIONALLY DRILL 8-1/2"INTERMEDIATE HOLE FROM 8216'TO 8414'MD, -550 GPM,3000 PSI ON,2700 PSI OFF -70 RPM,7-9K TQ -8KWOB -P/U 158K,S/O 122K, ROT 136K MW 9.9 IN/9.9 OUT -CALC ECD 10.32,TOOL ECD 10.55 12:00 - 00:00 12.00 DRILL P INT1 DIRECTIONALLY DRILL FROM 8414'TO 8983' MD. 590 GPM,3820 PSI ON,3382 PSI OFF C 100 RPM,7-9K TQ 15K WOB -P/U 172K,S/0 127K,ROT 148K MW 10.0 IN/10.0 OUT -CALC ECD 10.52,TOOL ECD 10.42 DRi1LL P T INT1 INO LOSSES OBSERVED 7/26/2011 00:00 - 01:30 1.`0 `' DIRECTIONALLY DRILL 8-1/2"INTERMEDIATE I HOLE F/8,983'T/9,079'-MD. -P/U 182K,S/0 132K,ROT 152K -586 GPM, PSI OFF 3,400, PSI ON 3,730 -100 RPM,TQ ON 11K, TQOFF9K -WOB 12K 01:30 - 02:00 0.50 DRILL 'P INT1 SERVICE RIG -TROUBLESHOOT IRON DERRICKMAN. REPLACE BLOWN FUSE. 02:00 - 07:00 5.00 DRILL P INT1 CONTINUE DRILLING F/9,079'T/9,316'-MD. -PUW 186K,SOW 134K,ROT 154K -580 GPM, PSI OFF 3,430, PSI ON 3,800 -100 RPM,TQ ON 10K, TQ OFF 8K -WOB 8-15K -SPR'S 9,267'-MD TVD-6,902' MW-9.9 PPG #IMP 20-SPM 350-PSI 30-SPM 475-PSI #2MP 20-SPM 350-PSI 30-SPM 450-PSI 07:00 - 08:30 1.50 DRILL P INT1 CIO SWAB&LINER ON MUD PUMP 2. CIRCULATE&RECIPROCATE -126 GPM,480 PSI 08:30 00:00 15.50 DRILL P INT1 CONTINUE DRILLING F/9.316'T/10.270'-M0, TVD 7,875' -PUW 212K,SOW 142K, ROT 176K -544 GPM, PSI OFF 3,640, PSI ON 3,950 -100 RPM,TQ ON 10K, TQ OFF 8K -WOB 8-15K -CALCULATED ECD 10.45, ACTUAL ECD 10.72 -MW IN 10.1, MW OUT 10.1 -SPR'S 9,836'-MD TVD-7,451' MW-10.1 PPG #1 MP 20-SPM 390-PSI 30-SPM 490-PSI #2MP 20-SPM 390-PSI 30-SPM 500-PSI Printed 9/6/2011 9:11:50AM North America-ALASKA- BP Page 9 of 19 Operation Summary Report • P rN P Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 7/27/2011 00:00 - 02:00 2.00 DRILL P INT1 DIRECTIONALLY DRILLING F/10,270'T/ 10.397'-MD. -PUW 217K,SOW 141K, ROT 174K -538 GPM, PSI OFF 3,670, PSI ON 3,810 -100 RPM,TQ ON 9K, TQ OFF 8K -WOB 5-10K -CALCULATED ECD 10.45, ACTUAL ECD 10.73 MW IN 10.1 PPG, MW OUT 10.1 PPG 02:00 - 03:30 1.50 DRILL P INT1 CHANGE SWAB ON MUD PUMP 1. -CIRCULATE WHILE ROTATING& RECIPROCATING DP -126 GPM,480 PS I. 03:30 - 09:00 5.50 DRILL P INT1 12tRECTIONALLY DRILLING F/10,397'T/ ;10,689'-MD. -PUW 231K,SOW 144K, ROT 184K -538 GPM, PSI OFF 3,710, PSI ON 3,950 -100 RPM,TQ ON 10K, TQOFF9K WOB 10K -RT ECD 10.73,MW IN 10.1 PPG, MW OUT 110.1 PPG -SPR'S 10,499'-MD TVD-8,099' MW-10.2 PPG #IMP 20-SPM 350-PSI 30-SPM 450-PSI #2MP 20-SPM 350-PSI 30-SPM 450-PSI 09:00 - 10:30 1.5'6 ''bRILL. `. P INT1 POOH F/10,689'T/10,489'VERIFY AND OBTAIN DEVIATION SURVEY. RIH T/ 10,689'-MD MW IN 10.2,MW OUT 10.2. 10:30 - 11:00 1 0.50 DRILL P INT1 CONTINUE DIRECTIONALLY DRILLING F/ 10,689'T/10,712'-MD,TVD 8,307' -PUW 231K,SOW 144K,ROT 184K -538 GPM, PSI OFF 3,710, PSI ON 3,950 -100 RPM,TQ ON 10K, TQ OFF 9K -WOB 10K -ECD 10.74,MW IN 10.2 PPG, MW OUT 10.2 PPG 11:00 - 12:00 1.00 DRILL P INT1 CHANGE SWAB ON MUD PUMP 2. -CIRCULATE WHILE ROTATING& RECIPROCATING DP -126 GPM,490 PSI. 12:00 - 17:00 5.00 DRILL P INT1 CONTINUE DIRECTIONALLY DRILLING F/ 10,712'T/10,969'-MD. -PUW 225K,SOW 148K,ROT 187K 550 GPM, PSI OFF 3,820, PSI ON 4,075 -100 RPM,TQ ON 10K, TQOFF9K -WOB 5-10K -ECD 10.68,MW IN 10.2 PPG, MW OUT 10.2 PPG 117:00 - 19:00 2.00 DRILL P INT1 CIRCULATE B/U&SAMPLES FOR GEOLOGIST TO PICK CSG POINT.NO INDICATION OF GLAUCONITE IN SAMPLES. -380 GPM, PSI 2,170 CHANGE SWAB&LINER MUD PUMP 2, CIRCULATING SAMPLES WITH MUD PUMP 1 Printed 9/6/2011 9:11:50AM • North America-ALASKA- BP Page 10 of 19 • Operation Summary Report Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) li Project:Prudhoe Bay Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 19:00 - 19:30 0.50 DRILL P INT1 DRILL ADDITIONAL 10-FT F/10,969'T/ it 10,979'-MD. - -550 GPM, PSI OFF 3,820, PSI ON 4,075 -100 RPM,TQ ON 10K, TQ OFF 9K WOB 10K RT ECD 10.68, MW IN 10.2 PPG, MW OUT 10.2 PPG 19:30 - 21:00 1.50 DRILL P INT1 CIRCULATE SAMPLES AT 10,979'-MD FOR GEOLOGIST TO PICK CSG POINT.MINIMAL TRACES INDICATION OF GLAUCONITE IN SAMPLES. -536 GPM,3,750 PSI 21:00 - 21:30 0.50 DRILL P INT1 DRILL ADDITIONAL 5-FT F/10,979'T/ 1q,984'-MD. ND 8,573' -PUW 237K,SOW 149K,ROT 181K -548 GPM, PSI OFF 3,820, PSI ON 4,080 -80 RPM,TQ ON 10K, TQ OFF 9K -WOB7K 24 HR-AST 0.76,ART 7.01 TOTAL BIT HRS 28.46,JARS 74.50 HRS -RT ECD 10.62,MW IN 10.2 PPG, MW OUT 10.2 PPG 21:30 - 22:30 1.00 DRILL P INT1 CIRCULATE SAMPLES AT 10,984'-MD FOR GEOLOGIST TO PICK CSG POINT. 1%TO MINIMAL TRACES OF GLAUCONITE IN SAMPLES. -548 GPM,3,750 PSI ROTATE,RECIPROCATE DP WHILE CIRCULATING SAMPLES. 22:30 - 23:00 0.50 DRILL P -- INT1 8-1/2"INTERMEDIATE TD CALLED 10,984'-MD, TVD 8,573' OBTAIN SURVEY AT 10,944',10,888-MD. TAKE SPR'S -SPR'S 10,944'-MD ND-8,573' MW-10.2 PPG #1MP 20-SPM 300-PSI 30-SPM 420-PSI #2MP 20-SPM 300-PSI 30-SPM 420-PSI 23:00 - 00:00 1.00 DRILL P INT1 MONITOR WELL(STATIC)PUMP, POOH F/ 10,984'T/10,785'-MD. -3 BPM, 126 GPM,430 PSI MW IN 10.2 PPG,MW OUT 10.2 PPG TRIP CLEAN WITH NO ISSUES. 7/28/2011 00:00 - 01:30 1.50 DRILL P ' INT1 PUMP POOH F/10.881'T/9,550'-MD ABOVE THRZ. -3 BPM,126 GPM,430 PSI MW IN 10.2 PPG,MW OUT 10.2 PPG NO ISSUES,TRIP CLEAN '01:30 - 04:30 3.00 DRILL P INT1 POOH ON ELEVATORS F/9,550'T/9,175'-MD. INTERMITTENT SWABBING. MONITOR WELL(STATIC) PUMP, POOH F/9,175'T/8,227'-MD PULL THRU WINDOW ON ELEVATORS,NO PUMP F/8,227'T/8,179'-MD NO ISSUES PUMPING POOH. Printed 9/6/2011 9:11:50AM • North America -ALASKA- BP Page 11 of 19 •Operation Summary Report Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B t 90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:30 - 06:00 1.50 DRILL P INT1 -MONITOR WELL AT WINDOW 8,179'-MD. CIRCULATE 2.5 B/U UNTIL CSG CLEAN.RT& RECIPROCATE DP.STAGE UP GPM WHILE MONITORING RT ECD. AT B/U SHAKERS LOADING UP. REDUCE RATE AS NECESSARY. -464 GPM,2,630 PSI -60 RPM,TQ 7K MW IN 10.3 PPG,MW OUT 10.3 PPG. 06:00 - 06:30 0.50 DRILL P INT1 MONITOR WELL(STATIC) -PJSM FOR RIG SERVICE&WORK ORDERS ON TOP DRIVE. 06:30 - 07:30 1.00 DRILL P INT1 SERVICE TD,BLOCKS&CROWN SHEAVES. PERFORM WORK ORDERS ON TOP DRIVE 7 - 07:30 - 10:00 2.50 DRILL P INT1 RIH ON ELEVATORS F/8,130'T/10,600'-MD. 'HOLE NOT GIVING CORRECT DISPLACEMENT.PUSHING MUD AWAY -MW IN 10.3 PPG,MW OUT 10.3 PPG. 10:00 - 11:00 1.00 DRILL P INT1 WASH F/10,600'T/10,976'-MD -3 BPM,550 PSI NO LOSSES 11:00 - 14:00 3.00 DRILL P INT1 CIRCULATE&CONDITION 10,984'-MD. STAGE UP PUMPS.RT&RECIPROCATE DP ' WHILE CIRC.HOLE CLEAN. -500 GPM,3,500 PSI ' -50 RPM,TQ 9K HEAVY CUTTINGS ON B/U W/10.4+MUD TO SURFACE. LOSS RATE 60-100 BPH. LOSS RATE DIMINISH TO 20 BPH WITH NEW MUD. 14:00 - 16:30 2.50 I DRILL P INT1 PUMP 35 BBL HI-VIS SWEEP SURFACE TO SURFACE.RT&RECIPROCATE DP 10%INCREASE IN CUTTINGS WHEN SWEEP SEEN AT SURFACE. TOTAL MUD LOSS WHILE CIRCULATING 125-BBL'S -500 GPM,3,500 PSI -50 RPM,TQ 9K CHANGE SWAB&LINER IN MUD PUMP 2 16:30 - 17:00 0.50 DRILL P INT1 PUMP 20-BBL,LCM 40 LBS-BBL PILL TO BIT AT 10,973'-MD. -454 GPM,2,900 PSI. MW IN 10.3 PPG,MW OUT 10.3 PPG MONITOR WELL(STATIC).OBTAIN SPR'S -SPR'S 10,965'-MD TVD-8,573' MW-10.3 PPG #1MP 20-SPM 300-PSI 30-SPM 420-PSI #2MP 20-SPM 300-PSI 30-SPM 420-PSI 17:00 - 18:00 1.00 DRILL P INT1 PUMP,POOH AT 800 FT-HR F/10,964'T/ 10,692'-MD SPOT LCM IN OPEN HOLE -60 GPM,315 PSI. Printed 9/6/2011 9:11:50AM North America-ALASKA- BP . Page 12 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type:RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date: 8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 18:00 - 00:00 6.00 DRILL P 1NT1 CONTINUE TO PUMP POOH F/10,692'T/ 8,038'-MD -126 GPM,430 PSI MW IN 10.3 PPG,MW OUT 10.3 PPG AVG.LOSS RATE 6 BPH PUMPING POOH. -WELL TOOK 35-BBL'S MORE THAN CALCULATED HOLE FILL,WHILE PUMPING POOH TO WINDOW.TRIP WAS CLEAN, NO TIGHT AREAS NOTED.PULL THROUGH WINDOW WITHOUT PUMP,NO ISSUES. -MONITOR WELL AT WINDOW 8,179'-MD (STATIC) 24-HR MUD LOSS TO WELL 160-BBL'S TOTAL LOSS TO SECTION 160-BBL'S 7/29/2011 00:00 - 02:00 2.00 DRILL P INT1 PUMP 2 B/U CIRCULATING 9-5/8-IN CSG CLEAN RT&RECIPROCATE DP F/8,020'T/ 7,940' -580 GPM,3,630 PSI -100 RPM,TQ 5-6K. NO LOSSES TO WELL DURING CIRCULATION MW IN 10.2 PPG,MW OUT 10.2 PPG MONITOR WELL(STATIC).PUMP DRY JOB, BLOW DOWN TD. DROP DP DRIFT 02:00 06:30 4.56 DRILL p INT1 ,POOH ON ELEVATORS F/8,020'T/644'-MD MONITOR WELL(STATIC).PJSM-FOR BHA MW IN 10.2 PPG,MW OUT 10.2 PPG TRIP CLEAN. HOLE TOOK PROPER FILL DURING TRIP. 06:30 - 10:00 3.50 DRILL P INT1 CIO SLIP INSERTS. -UD 5"HWDP,JARS,6 3/4"NMFC&MWD.- UD STABILIZER,BREAK BIT&LID MOTOR. NO ABNORMAL WEAR OR DAMAGE VISIBLE NOTED. BIT GRADED:1-1-WT-G-X-I-CT-TD 10:00 - 11:00 1.00 i P INT1 CLEAN&CLEAR RIG FLOOR. 11:00 - 12:30 1.50 CASING P INT1 PUMP OUT BOPE STACK.PULL WEAR BUSHING. -FLUSH BOPE WHILE FUNCTIONING ALL RAMS.-P/U SHEAR JNT&FLUSH STACK. -PJSM FOR CHANGING RAMS AND PRESSURE TESTING. 12:30 - 14:30 2.00 CASING P INT1 L/D SHEAR JNT.BLOW DOWN TD.DRAIN BOPE STACK,SET TEST PLUG. PRESSURE TEST THE TEST PLUG,250-PSI LOW FOR 5-CHARTED MINUTES& 3,500-PSI HIGH FOR 10-CHARTED MINUTES. FULL FUNCTION CLOSING TIME OF BLIND RAMS:29-SEC 14:30 - 15:00 0.50 CASING P INT1 C/O TOP PIPE RAMS T/4-1/2"X 7"VARIABLES. FUNCTION TOP RAMS. FULL FUNCTION CLOSING TIME OF TOP PIPE RAMS: 19-SEC. 15:00 - 18:00 3.00 CASING P INT1 1 R/U TEST EQUIPMENT.TEST TOP PIPE RAMS TO 250-PSI LOW,5 CHARTED MINUTES. 3,500-PSI,5 CHARTED MINUTES. 18:00 - 20:00 2.00 CASING P INT1 RN 7"LINER RUNNING EQUIPMENT,POWER TONGS.M/U 7"X 4-1/2"XO TO FOSV. M/U BAKER TD CMT HEAD TO SINGLE JNT DP.LID SAME TO PIPE-SHED Printed 9/6/2011 9:11:50AM North America -ALASKA- BP Page 13 of 19 Operation Summary Report Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM I Rig Release:8/9/2011 Rig Contractor:DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B©90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 20:00 - 20:30 0.50 CASING P INT1 PJSM-RUNNING 7"LINER. 20:30 - 22:30 2.00 CASING N RREP 41.00 INT1 BRING 7"SHOE JNT TO FLR.LATCH MECHANISM ON 7"BX ELEVATORS NOT ABLE TO CLOSE PROPERLY WITH 7"INSERTS INSTALLED. PJSM-REMOVE BX ELEVATORS INSTALL 7" SIDEDOOR ELEVATORS. 22:30 - 23:30 1.00 CASING N RREP 41.00 INT1 P/U 7-IN,26 LB-FT,BTC-M SHOE JNT&FLOAT COLLAR JNT.TROUBLESHOOT CSG TONGS. 23:30 - 00:00 0.50 CASING P INT1 CONTINUE TO M/U 7",26 LB-FT SHOE TRAK PER PROGRAM.BAKER LOK CONNECTION. TRQ BTC-M TO MARK.FILL CSG,P/U CHECK FLOATS(OK). 7/30/2011 00:00 - 05:30 5.50 CASING P INT1 RIH F/244'T/2,905'WITH 7-IN,26 LB-FT,HC VAM TOP LINER PER PROGRAM.APPLY JET LUBE SEAL GUARD.TRQ TURN JNTS T/ 11,950 FT-LBS. FILL EACH JNT. 05:30 - 07:00 1.50 CASING P INT1 R/D LINER RUNNING EQUIPMENT.M/U BAKER FL,EEXLOCK LINER HANGER,ZXPN LINER TOP TACKER ASSEMBLY.P/U SHEAR JNT M/U TO STRING 07:00 - 08:00 1.00 CASING P .. INT1 CIRCULATE WHILE PREPPING PAL MIX& PLACING SAME INTO TIE-BACK SLEEVE. 3-BPH,200 PSI 151 BBL PUMPED TOTAL.MONITOR WELL (STATIC). 08:00 08:30 0.50 CASING P INT1 UD SHEAR JNT.C/O SLIP INSERTS. 08:30 - 14:30 6.00 CASING P. ' INT1 RIH W/7-IN LINER ON 4-IN''P F/2,940'T/ 8,153'-MD.ABOVE 9-5/8-IN WINDOW FILL DP EACH 10-STNDS,CIRC DOWN AT 14:30 - 16:30 2.00 CASING P j 3-BPM FOR 200-STKS ONCE DP IS FULL. INT1 BREAK CIRCULATION STAGING UP PUMP RATE. 3-BPM,413-PSI.CIRC 555-BBL TOTAL MONITOR WELL 10-MIN(STATIC) _ 16:30 - 20:30 4.00 CASING P INT1 CONTINUE RIH F/8,153'T/9,480'-MD -WASH DOWN F/9,480'T/9,670'-MD 3-BPM,430-PSI CONTINUE RIH F/9,670'T/10,965'-MD. FILL DP EACH STAND 20:30 - 21:00 0.50 CASING P INT1 OBTAIN PARAMETERS AT 10,965'-MD. PUW-260K,SOW-135K M/U BAKER,TD CMT HEAD&CMT HOSE. 21:00 - 21:30 0.50 CASING P INT1 BREAK CIRC.WASH DOWN F/10,965'TAG TD 10,984'-MD PUW-260K,SOW-135K 2-BPM,535-PSI MW IN-10.2 PPG,MW OUT-10.3 PPG NO TIGHT SPOTS OBSERVED RIH Printed 9/6/2011 9:11:50AM North AmeC1 a ALASKA 6P ° = Page 14.of 19;= Operation Summary' eport Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project. Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI: 500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 21:30 - 00:00 2.50 CASING P 10,983.98 INT1 CIRCULATE. STAGE UP PUMP RATE TO 5-BPM. INCREASE RATE IN 1-BPM INCREMENTS. 2-BPM,535-PSI. 3-BPM,530-PSI. 4-BPM,640-PSI 4.5-BPM,712-PSI 5-BPM,830-PSI 5594-STROKES INTO CIRCULATION(563-BBL) OBSERVE FLOW-LINE INCREASE OF 17%. FLOW INCREASE FROM 23%TO 40%.SHUT DOWN PUMP. MONITOR WELL, WELL FLOWING.SHUT WELL IN. VERIFY WELL SHUT IN.OBSERVE PRESSURES,SICP 0-PSI.SIDP 0-PSI MW IN-10.2 PPG,MW OUT-10.3 PPG.TOTAL PIT GAIN 4-BBL BOPE ACCUMULATOR SYSTEM 3,000-PSI. ACCUMULATOR MANIFOLD 1,500-PSI WELL SECURE AT 23:53 HRS. 7/31/2011 00:00 - 01:00 1.00 CASING N DPRB 10,983.98 INT1 MONITOR PRESSURES TO SHUT IN WELL. SICP 0-PSI,SIDP 0-PSI DEVELOP PLAN FORWARD. PJSM W/ALL ESSENTIAL PERSONNEL.DDI, BPXA, HES 01:00 - 02:00 1.00 CASING P 10,983.98 INT1 FINISH W/CBU THRU CHOKE MANIFOLD. NO OBSERVED FLOW WITH CHOKE OPEN. CIRC 104-BBL THROUGH CHOKE 3-BPM,360-PSI MW IN-10.2 PPG,MW OUT 10.2 PPG. 1-BBL TOTAL LOSS WHILE CIRCULATING 0.5-PPG GAS CUT MUD.INITIALLY ON START OF CIRCULATION. NO PIT GAIN DURING CIRCULATION. 02:00 - 02:30 0.50 CASING P 10,983.98 INT1 PUMP OFF,MONITOR WELL SICP 0-PSI,SIDP 0-PSI MONITOR WELL THROUGH CHOKE(STATIC) -GAIN APPROVAL FROM WTL TO PROCEED WITH OPERATIONS. OPEN ANNULAR PREVENTER&MONITOR WELL(STATIC). BLOW DOWN CHOKE MANIFOLD AND CHOKE LINE. 02:30 - 05:00 2.50 CASING P 10,983.98 INT1 CIRCULATE B/U,STAGING UP PUMP. 825-BBL'S PUMPED. 5-BPM,780-PSI 04:45-PJSM AND BRIEFING WITH ALL PERSONNEL&SLB CEMENTING CREW ON PROCEEDING FORWARD. Printed 9/6/2011 1:16:02PM ata -°r nerica-A .A S f3P E '0145t-Z, a 15 of 19. per tionSummary.."Report , IEEE Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date: 8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 05:00 - 07:00 2.00 CASING P INT1 B/D CMT LINE TO SLB.LINE UP TO SLB -PUMP 25-BBL OF 12.5-PPG MUD PUSH. -TEST LINES TO 4,500-PSI(OK). -PUMP 48-BBLS SX) 15.8-PPG CLASS G TAIL CMT RELEASE TOP PLUG,VERIFY PLUG LEFT CMT HEAD. CHASE PLUG W/10-BBL H2O F/SLB WASHING UP LINES. SWAP TO RIG&DISPLACE W/10.2-PPG LSND MUD AT 5-BPM -ICP ONCE CAUGHT CMT 5-BPM,340-PSI. -BUMP PLUG AT 184-BBL PUMPED.PUMP EFFICIENCY 100%... CMT IN PLACE 07:00 HRS. 07:00 - 07:30 0.50 CASING P INT1 PRESS URE T/3,000-PSI,SET LINER HANGER. 5/0&CONFIRM HANGER SET. PRESSURE %4,000-PS[SET PACKER, RELEASE RUNNING TOOL. BLEED PU1& CHECK FLOATS(OK). 07:30 - 08:00 0.50 CASING P INT1 R/D CMT EQUIP.B/D LINES TO SLB. 08:00 - 09:00 1.00 CASING P INT1 CBU,431-GPM, 1,520-PSI. PUMPED 514-BBL. 09:00 - 09:30 0.50 CASING P INT1 R/D BAKER CMT TD HEAD. L/D DOUBLE TO PIPE-SHED. 09:30 - 15:00 5.50 CASING P INT1 POOH F/7,999'T/SURFACE.MONITOR WELL PRIOR TO BHA(STATIC) -L/D BAKER LINER RUNNING TOOL. RUNNING TOOL GOOD CONDITION, NO CMT OBSERVED ON TOOL. MW IN 10.2-PPG,MW OUT 10.2-PPG NO ISSUES ON TRIP. 15:00 - 16:00 1.00 CASING P INT1 CLEAN&CLEAR RIG FLOOR. BREAK DOWN BAKER CMT HEAD.DRAIN BOP STACK. 16:00 - 18:00 2.00 BOPSUR P INT1 PULL WEAR BUSHING,SET TEST PLUG. PJSM-C/O UPPER RAMS F/4-1/2"X 7"VBR T/ 2-7/8"X 5-1/2"VBR. INSTALL 4"TEST JNT.R/U BOP TEST EQUIP. PERFORM CHOKE,GAS-BUSTER TEST.FILL BOP STACK 13-BBL.FILL GAS-BUSTER 18-BBL.CIRC AT 4-BPM,49-PSI.DRAIN GAS-BUSTER. Printed 9/6/2011 1:16:02PM America st P 1f'f 3 �`� ' &�t RI ll'%,-• �• AIT1Yn�GQ A : P� € t i � �. gl R 4 . p n _ . ' [, k. ti r, ` Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date: 8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay Site:PB A Pad . Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12.00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 18:00 - 23:00 5.00 BOPSUR P INT1 PJSM.TEST BOPE TO 250-PSI LOW,3500-PSI HIGH AS PER AOGCC AND BP POLICY.TEST ANNULAR PREVENTER TO 250 PSI LOW,3500 PSI HIGH AS PER AOGCC AND BP POLICY. EACH TEST 5-CHARTED MINUTES.TEST THE UPPER VARIABLES AND LOWER VARIABLES WITH 4 IN AND 4 1/2 IN TEST JOINTS.TEST THE ANNULAR PREVENTER WITH 4-IN TEST JOINT. NO FAILED TESTS.TEST WITNESS WAIVED BY BOB NOBLE WITH AOGCC_ TEST WITNESSED BY WSL RICK DOLFI AND TOURPUSHER ERIC RODLAND. -PERFORMED ACCUMULATOR TEST: SYSTEM PRESSURE 3,000-PSI,PRESSURE AFTER CLOSING ALL RAMS AND ANNULAR PREVENTER 1,650-PSI. RECOVERED 1ST 200-PSI-22 SECONDS. FINAL PRESSURE OBTAINED-112 SECONDS. 6 NITROGEN BOTTLES,AVERAGE PRESSURE=2,260-PSI. PER API RP 53--FUNCTION AND RECORD RESPONSE TIME OF ACTIVATION AND FULL CLOSURE AS FOLLOWS:LOWER PIPE RAMS 21-SEC.BLIND/SHEAR RAMS 29-SEC.UPPER PIPE RAMS 21-SEC.ANNULAR 23-SEC.HCR KILL 2-SEC.HCR CHOKE 2-SEC. 23:00 - 00:00 1.00 BOPSUR P INT1 PULL TEST PLUG,INSTALL WEAR BUSHING. R/D BOP TEST EQUIPMENT.B/D CHOKE.R/U TO TEST CSG.M/U SHEAR JNT. 8/1/2011 00:00 - 00:30 0.50 CASING P INT1 R/U TO TEST 7-IN CSG.FILL LINES FILL STACK. 00:30 - 02:00 1.50 CASING P INT1 TEST CSG T/250-PSI LOW 5-CHARTED MINUTES,3,500-PSI FOR 30-CHARTED MINUTES.TEST GOOD-WTL APPROVAL TO CONTINUE OPERATIONS.BLEED PRESSURE. 02:00 - 02:30 0.50 CASING P INT1 R/D TEST EQUIPMENT.R/U HANDLING ®- EQUIPMENT.SERVICE IRON DERRICK MAN IDM) 02:30 - 05:00 2.50 DRILL P -_ INT1 P/U 6-1/8"DRLG BHA.BIT,MOTOR, STABILIZER AND MWD. 05:00 - 06:00 - 1.00 DRILL P -_ INT1 DOWN-LOAD MWD.CLEAN AND CLEAR RIG FLR 06:00 - 06:30 0.50 DRILL P ._ INT1 SHALLOW TEST MWD(OK) -230 GPM, 1360 PSI 06:30 - 07:00 0.50 DRILL P -_ INT1 PJSM-LOAD SOURCE INTO ALD-CTN COLLAR. 07:00 - 08:00 1.00 DRILL P -_ INT1 CONTINUE P/U BHA T/428'-MD.CIO SLIP INSERTS TO 4-IN DP. 08:00 14:00 6.00 DRILL P ■- INT1 RIH W/BHA ON 4-IN DP F/428'T/8,012'MD. D FILL DP ON TRIP IN. -PUW 150K,SOW 110K 14:00 - 14:30 0.50 DRILL P -_ INT1 CIRCULATE DP VOLUME 8,012-MD -212 GPM, 1770 PSI. 14:30 - 16:30 2.00 DRILL P INT1 RIH F/8,012'PAST 7-IN TOL AT 8,052'-MD.NO ISSUES GOING INTO LINER TOP.CONTINUE RIH F/8,052'T/10,780'-MD.TAG CMT 10,780'-MD Printed 9/6/2011 1.16.02PM OIth Ft 1 }�SKf �� "` P of age 17 19 Operation' ary, o� € Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3 00Y3D-C(2,997,508.00) Project:Prudhoe Bay Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B©90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:30 - 17:30 1.00 DRILL P INT1 BREAK CIRC.WASH-DOWN F/10,780'T/ 10,897-MD.TAG LNDG CLR ON DEPTH 10,899'-MD -PUW 215K,SOW 130K,RTW 162K -227 GPM, 2,270 PSI -50 RPM,TRQ 8K -SPR'S 10,780'-MD TVD-8,373' MW-10.2 PPG #1 MP 20-SPM 760-PSI 30-SPM 1160-PSI #2MP 20-SPM 700-PSI 30-SPM 1020-PSI 17:30 - 19:00 1.50 DRILL P INT1 CBU AT 10,897-MD PUMP 555-BBL TOTAL -'227 GPM, 2,186 PSI -50 RPM,TRQ 11K. HOLD PJSM FOR DISPLACING TO 8.6-PPG QUIK-DRILN MUD WHILE CBU 19:00 - 22:00 3.00 DRILL P INT1 LINE UP AND DISPLACE WELL FROM 10.2-PPG TO 8.6-PPG QUIK-DRILN MUD.PUMP AT 270 GPM.2,750 PSI ICP. RECIPROCATE AND ROTATE AT 100 RPM WITH 11K TORQUE.SHUT DOWN AND MONITOR WELL-STATIC. 22:00 - 22:30 0.50 DRILL P INT1 MONITOR WELL FOR FLOW FOR 30-MINUTES AS NEGATIVE PRESSURE TEST TO LINER.- MW IN 8.6-PPG -WELL STATIC--WTL APPROVAL TO CONTINUE OPERATIONS 22:30 - 23:30 1.00 DRILL P INT1 CLEAN UNDER SHAKERS,CHANGE SHAKER SCREENS.CLEAN PITS 1-3.LOAD INTO PITS 1-6 NEW 8.6-PPG QUIK-DRILN MUD. CONTINUE WITH MONITORING WELL- STATIC -OUT OF CRITICAL PATH SERVICE TOP-DRIVE AND IDM 23:30 - 00:00 0.50 DRILL P INT1 OBTAIN SPR'S AND DRILLING PARAMETERS. BEGIN DRILLING LNDG CLR F/10,899'-MD -PUW 189K,SOW 148K,RTW 170K -260 GPM,1,900 PSI -60 RPM,TRQ OFF 5K, -SPR'S 10,897'-MD TVD-8,573' MW-8.6 PPG #1 MP 20-SPM 410-PSI 30-SPM 620-PSI #2MP 20-SPM 410-PSI 30-SPM 620-PSI 8/2/2011 00:00 - 03:30 3.50 DRILL P INT1 DRILL CEMENT AND 20-FT OF NEW FORMATION 10,899'T/11,004'-MD. 7'230 GPM,PSI 1,575 ON BOT1 OM,1,500 PSI OFF BOTTOM. -RPM 60-100,TRQ 3-7K -WOB 5-15K. MW IN 8.7-PPG MW OUT 8.7-PPG. 05:30 - 06:30 1.00 EVAL P PROD1 1Q983'-MD TVD-8,572'PERFORM FIT TO 9.56-PPG -MW IN 8.7-PPG,MW OUT 8.7-PPG -EMW 9.56-PPG,W/385-PSI. -BBLS PUMPED 0.9-BBL Printed 9/6/2011 1:16:02PM x ' "" ===!A'I ALASI e% of I 5 Opera ,p St mmary ep1r" i Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 03:30 - 05:00 1.50 DRILL P INT1 CIRCULATE&CONDITION MUD FOR FIT. ROTATE&RECIPROCATE F/11,000'T/ 10,955'-MD -255 GPM,1,850 PSI -60 RPM,TRQ 5K 553 BBL PUMPED TOTAL.MONITOR WELL (STATIC) 05:00 - 05:30 0.50 EVAL P - PROD1 PULL UP 1-STAND INTO 7"CSG SHOE AT 10,983'-MD.R/U EQUIP.&FILL LINES FOR FIT. 06:30 - 07:00 0.50 EVAL P . PROD1 R/D FIT TEST EQUIPMENT.BLOW DOWN KILL LINE. 07:00 - 19:30 12.50 DRILL P PROD1 DIRECTIONALLY DRILL 6-1/8"PROD.HOLE FROM 11,004'TO 11,610.-MD, TVD 9,185' -PUW 228K,SOV4 148K,RO 1 171 K ;-275 GPM, PSI OFF 2,230, PSI ON 2,330 100 RPM,TQ OFF 8K,TQ ON 10K -WOB 12K -MW IN 8.7 PPG, MW OUT 8.7 PPG. -TOTAL BIT HRS 9.22,AST.95,ART 8.27,JAR HRS 9.22 19:30 - 20:30 1.00 DRILL P PROD1 MONITOR WELL(STATIC)OBTAIN SPR'S AND PARAMETERS SPR'S 20:18 HRS 11,600'-MD TVD-9,185' MW-8.7 PPG #IMP 20-SPM 620-PSI 30-SPM 840-PSI #2MP 20-SPM 620-PSI 30-SPM 840-PSI 20:30 - 22:00 1.50 DRILL "P PROD1 BACK-REAM POOH F/11,610'T/11,130' -PUW 225K,138K,169K -275 GPM,2,215 PSI -100 RPM,TRQ 9K ............ -MW IN 8.7 PPG,MW OUT 8.7 PPG NO TIGHT SPOTS,OR LOSSES NOTED. 22:00 - 23:00 1.00 DRILL P PROD1 POOH F/11,130'T/10,980'-MD W/BAT SONIC LOGGING PARAMETERS. -PULLING SPEED 350-FPH. NO TIGHT SPOTS OBSERVED. 23:00 - 00:00 1.00 DRILL P PROD1 CIRCULATE 7-IN CSG CLEAN AT 10,817-MD. RT&RECIPROCATE DP F/10,760'T/ 10,855'-MD -275 GPM,2,160 PSI -100 RPM,TRQ 8K 8/3/2011 00:00 - 01:00 1.00 DRILL P PROD1 CIRCULATE 7"CSG CLEAN AT 10,817'-MD. RT&RECIPROCATE DP F/10,760'TI 10,855'-MD -275 GPM,2,160 PSI -100 RPM,TRQ 8K -MW IN 8.7 PPG,MW OUT 8.7 PPG -523 BBL'S PUMPED. MONITOR WELL STATIC 01:00 - 03:00 2.00 DRILL P PROD1 POOH F/10,850'T/10,286'-MD W/BAT SONIC LOGGING PARAMETERS. -PULLING SPEED 350-FPH. HOLE FILL VOLUMES CORRECT. TRIP CLEAN. 03:00 - 03:30 0.50 DRILL P ._ PROD1 MONITOR WELL;PUMP DRY JOB.DROP 1.92-IN DP DRIFT.BLOW DN TD Printed 9/6/2011 1:16:02PM .° er — A Parr e 9 p 9 Surriti i Re o s. 1,•:. _ Common Well Name:A-25 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date:7/7/2011 End Date:8/9/2011 X3-00Y3D-C(2,997,508.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 03:30 - 10:00 6.50 DRILL P PROD1 POOH F/10,286'-MD WITH BAT SONIC LOGGING PARAMETERS. -PULLING SPEED 350-FPH. HOLE FILL VOLUMES CORRECT. TRIP CLEAN. 10:00 - 14:00 4.00 DRILL P PROD1 .CONTINUE POOH ON ELEVATORS F/8,567'T/ 428'-MD MW IN 8.7-PPG,MW OUT 8.7-PPG TRIP CLEAN, NO ISSUES MONITOR WELL AT BHA(STATIC) 14:00 - 14:30 0.50 DRILL P PROD1 CHANGE PS-21 SLIP INSERTS F/4"DP TO HAND SLIP BUSHINGS FOR BHA.. 14:30 - 17:30 3.00 DRILL P PROD1 L/D 4"HWDP,4-3/4"JARS,AND FLEX COLLARS. PJSM FOR SOURCE HANDLING.LID PULSER COLLAR, BAT COLLAR.REMOVE AND CONTAIN SOURCE.L/D ALD/CTN COLLAR.LID REMAINDER OF BHA. BIT GRADE:2-3-BT-A-E-I-CT-TD NO ABNORMAL WEAR,OR VISUAL DAMAGE NOTED. 17:30 - 18:00 0.50 DRILL P PROD1 CLEAN AND CLEAR RIG FLOOR. -PJSM FOR R/U 4-1/2"LINER EQUIPMENT. Printed 9/6/2011 1:16:01PM • . 4 ® America- 4,`` . � ®'® Lion Sum epQ*€ € Common Well Name:A-25 AFE No Event Type: COM-ONSHORE(CON) Start Date:7/26/2011 End Date: X3-00XM8-C: (1,365,903.00) Project: Prudhoe Bay Site:PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 8/3/2011 18:00 - 20:00 2.00 CASING P RUNPRD R/U 4-1/2"LINER RUNNING EQUIP.M/U BOT TD CMT-HEAD TO 15-FT PUP,L/D TO SHED -PJSM FOR RUNNING LINER WITH ALL PERSONNEL. 20:00 - 23:30 3.50 CASING P RUNPRD M/U 4-1/2"12.6 LB-FT,L-80 SHOE-TRACK, LNDG CLR JNT.BAKERLOK CONNECTIONS. FILL&CHECK FLOATS(OK). CONTINUE RIH T/792'-MD WITH 4-1/2" VAM-TOP..APPLY JET LUBE SEAL GUARD. TRQ TURN EACH JNT T/OPTIMUM 4440 FT-LBS. 23:30 - 00:00 0.50 CASING P RUNPRD M/U 7"X 4-1/2"FLEX-LOCK PROD.LINER HANGER. P/U SHEAR JNT MAKE UP TO STRING.PREP AND PLACE PAL-MIX INTO TBS.CIRCULATE 2 LINER VOL.24 BBL'S -PUW 52K,SOW 53K -2 BPM,70 PSI -MW IN 8.7-PPG`, MW OUT 8.7-PPG 8/4/2011 00:00 - 10:00 10.00 CASING P RUNPRD RIH F/792'T/10,975'-MD.WITH 4-1/2", 12.6 LB-FT PROD.LINER ON 4"DP AT 90-100 FT-MIN FILL EACH 10-STANDS. MW IN 8.7-PPG,MW OUT 8.7-PPG TRIP CLEAN, NO ISSUES. 10:00 - 11:00 1.00 CASING P RUNPRD STAGE UP PUMP.BREAK CIRCULATION 10,975'-MD -PUW 220K,SOW 125K _ -5 BPM,700 PSI TOTAL 177 BBL'S PUMPED MONITOR WELL(STATIC) 11:00 - 11:30 0.50 CASING P RUNPRD RIH F/10,975'T/11,598'-MD WITH 4-1/2"LINER ON 4"-DP. MW IN 8.7-PPG,MW OUT 8.7-PPG TRIP CLEAN 111:30 - 12:00 0.50 CASING P RUNPRD R/U BAKER TD CMT HEAD&EQUIP.RIH,TAG TD AT 11,610'-MD EST CIRCULATION,STAGGING PUMP RATE TO 5-BPM. RECIPROCATE F/11,610'T/11,590'-MD -PUW 221K,SOW 130K. -5 BPM,210 GPM,885 PSI 12:00 - 13:00 1.00 CASING P RUNPRD PJSM WITH ALL PERSONNEL FOR CMT OPERATIONS.CONTINUE TO CIRC.& RECIPROCATE WHILE BATCH MIXING CMT. -PUW 221K,SOW 130K -5 BPM,210 GPM,890 PSI -MW IN 8.7-PPG,MW OUT 8.7-PPG NO LOSSES THROUGHOUT CIRCULATION. Printed 9/6/2011 1:17:26PM Nort W l ALASKA BP PAQ,,Of 7- Operatiotmary Report Common Well Name:A-25 AFE No Event Type:COM-ONSHORE(CON) Start Date:7/26/2011 End Date: X3-00XM8-C: (1,365,903.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 13:00 - 14:00 1.00 CASING P RUNPRD LINE UP SLB T/CMT HOSE. PUMP CMT PER PROGRAM. WHILE PUMPING CEMENT RECIPROCATE DP 20'-FT THROUGHOUT DURATION OF JOB. -PUMP 20 BBL 12.5-PPG MUDPUSH AT 3-BPM, 570-PSI. TEST LINES TO 4,700 PSI(OK).PUMP 25-BBL . G CMT W/GAS BLOK,15.8-PPG,AT 5 BPM. ICP 542 PSI, FCP 433 I'SI -DROP DP WIPER DATTATTLE TAIL INDICATES PLUG LEFT CMT HEAD. -DISPLACE W/RIG PUMP;20-BBL PERF PILL, FOLLOWED BY 8.7-PPG QUICK-DRILL MUD AT 5-BPM, 260-PSI.BUMP PLUG W/CORRECT VOL AT 124-BBL -CEMENT IN PLACE 13:46 HRS. 14:00 - 14:30 0.50 CASING P RUNPRD PRESSURE TO 3,000-PSI, SLACK OFF SET FLEX-LOCK HGR,WHILE HOLDING PSI. -BLEED&CHECK FLOATS(OK).PRESSURE DP TO 4,100-PSI, BLED T/0-PSI,SHEAR HRD-E RUNNING TOOL. -P/U ON DP VERIFY RUNNING TOOL RELEASED F/LINER. P/U WT.221 K P/U 5'PLACE SHEAR INDICATOR DOG SUB ABOVE ZXP TIE BACK SLEEVE -SLACK DOWN SET ZXP PKR W/55K DN WT. INDICATION OF SHEAR W/25K WT -RID CMT LINE, P/U DP 2'ABOVE ZXP PKR. RT DP 15 RPM.SLACK OFF W/ROTATING DOG SUB&ENGAGE ZXP PKR,SLACK OFF TILL 60K DOWN WT ON ZXP PKR. -PRESSURE T/1000-PSI.SLOWLY P/U&PULL PACK-OFF UNTIL RELEASE OF PSI&CIRC EST.TOTAL P/U 12-FT.CIRC AT 7-BPM. CONTINUE TO P/U 20-FT, ESTABLISH FULL CIRCULATION RATE,12-BPM,1780-PSI. -4-1/2"TOL AT 10,825-MD 14.30 - 16:00 1.50 CASING P RUNPRD FLUSH LINER TOP 10,825'-MD, POOH 58-FT, RECIPROCATE&CIRC. -12 BPM,1780 PSI. TOTAL 700 BBL'S PUMPED. 16:00 - 19:00 3.00 CASING P RUNPRD MONITOR WELL(STATIC)UD TD CMT HEAD 15'-PUP&DP JNT. -CLEAN PITS 1-5&CUTTING TANK.CLEAN MUD TROUGH.BRING ONBOARD 8.5-PPG 2% KCL TO PITS 3,4,5. -PJSM FOR DISPLACING. 19:00 - 21:00 2.00 CASING P RUNPRD DISPLACE WELL T/8.5-PPG 2%KCL -FUW 24-0-K OW 1101C 10 BPM,420 GPM,1315 PSI 946 BBL PUMPED. 21:00 - 22:00 1.00 CASING P RUNPRD MONITOR WELL(STATIC)B/D TD. PJSM FOR POOH UD DP. 22:00 - 00:00 2.00 CASING P RUNPRD POOH F/10,800'T/10,192'-MD. UD ALL 4"DP IN SINGLES TO PIPE-SHED 8/5/2011 00:00 - 08:00 8.00 CASING P RUNPRD POOH F/10,192'T/3,178'-MD.UD 4"DP IN SINGLES TO PIPE-SHED,MONITOR DISP.VIA TRIP TANK Printed 9/6/2011 1:17:26PM c, Amer A E ',3 _ of 7 ' Operation ummary, r 7 Common Well Name:A-25 AFE No Event Type: COM-ONSHORE(CON) Start Date:7/26/2011 End Date: X3-00XM8-C: (1,365,903.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:00 - 14:00 6.00 CASING P RUNPRD POOH F/3,178'T/2,000'-MD -P/U(9)STANDS F/DERRICK RIH TO 2,846-MD -POOH F/2,846'T/SURFACE.L/D 4"DP IN SINGLES TO PIPE-SHED, -L/D LINER RUNNING TOOL, DOG SUB SHEARED -MONITOR WELL(STATIC) -MW IN 8.5-PPG,MW OUT 8.5-PPG 14:00 - 16:00 2.00 CASING P RUNPRD PJSM-R/U`SLB E-LINE EQUIPMENT ■ -M/U SLB,BAILER JUNK BASKET AND 6.05"-OD GAUGE RING 16:00 - 20:30 4.50 CASING P RUNPRD RIH T/9,720'WLM VV/SLB E-LINE BAILER JUNK BASKET AND 6.05"GAUGE RING -PULL TIGHT,WORK FREE AT 9,744' -POOH T/9,686'WLM,PULL TIGHT,HOLD 5,300-LBS TENSION, PULL FREE -POOH F/9,686'WLM T/SURFACE. OBSERVED 600-LB DECREASE IN E-LINE TENSION ONCE INTO 9-5/8"CSG. -CONSULT WITH WTL&ODE ON FORWARD PLAN.. -MONITOR WELL VIA TRIP TANK 120:30 - 22:00 1.50 CASING P RUNPRD PJSM -PRESSURE TEST 4-1/2"LINER AND CSG. 250-PSI LOW 5-MIN/3,_500-PSI HIGH,30-MIN CHARTED(GOOD TEST)-WTL APPROVAL TO CONTINUE OPERATIONS -BLEED TO 0-PSI,OPEN CHOKE,VERIFY NO PRESSURE,OPEN BLIND RAMS -B/D CHOKE AND KILL LINE 22:00 - 23:30 1.50 CASING N DPRB 8,051.98 RUNPRD M/U SLB BAILER JUNK BASKET W/5.90"-OD GAUGE RING. -RIH,TAG UP AT 8,040'WLM.7"LINER TOP 8,052'-MD.ATTEMPT TO WORK DOWN PAST, WITHOUT SUCCESS. -CONSULT WTL&ODE.PROCEEED W/ MOBILIZING SLICKLINE UNIT FOR LEAD IMPRESSION BLOCK(LIB)RUN. 23:30 - 00:00 0.50 CASING N DPRB 8,051.98 RUNPRD POOH F/8,040'WLM W/5.90"-OD GAUGE RING, NO DEBRIS FOUND IN JUNK BASKET -MONITOR HOLE(STATIC). 8/6/2011 00:00 - 02:00 2.00 CASING N DPRB _ RUNPRD L/D SLB JUNK BASKET,5.90"GAUGE RING. R/D SLB E-LINE EQUIPMENT. 02:00 - 05:00 3.00 CASING N DPRB RUNPRD PJSM W/ALL PERSONNEL,SPOT SLICK LINE UNIT AND EQUIPMENT.M/U LEAD IMPRESSION BLOCK. PREPARE TO RUN IN HOLE WITH SAME. 05:00 - 08:30 3.50 CASING N DPRB RUNPRD RIH WITH 6"OD LIB ON SLICKLINE.TAG UP ON TOP OF 7"LINER @ 8,062'SLM. PICK UP AND SLACK OFF TO TAP DOWN ON IMPRESSION BLOCK. IMPRESSION BLOCK SLIPPED INTO 7"LINER.CONTINUE RIH IN 100'INCREMENTS AND STOPPING TO GET FREQUENT PICK UP WEIGHTS.CONTINUE RIH WITH IMPRESSION BLOCK AND TAG TOP OF 4 1/2"LINER AT 10,831'SLM.POH WITH NO OVERPULLS OR PROBLEMS. IMPRESSION BLOCK SHOWED NO INDICATION OF IRREGULAR MARKINGS. Printed 9/6/2011 1:17:26PM � r merlca ALASI BFI E, J E P see 'f 7 p ration Summary Report ; Common Well Name:A-25 AFE No Event Type:COM-ONSHORE(CON) Start Date: 7/26/2011 End Date: X3-00XM8-C: (1,365,903.00) Project: Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B©90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:30 - 10:00 1.50 CASING N DPRB RUNPRD RIH WITH 3.50"GAUGE RING.UNABLE TO GET INTO 7"LINER.POH.METAL MARKINGS ON GAUGE RING. 10:00 - 11:00 1.00 CASING N DPRB RUNPRD RIH WITH BULL NOSE AND 3.625" CENTRALIZER.NO ISSUES RUNNING IN THE HOLE AT 7"LINER TOP OR 4-1/2"LINER TOP. WAS ABLE TO RIH TO 11,390'SLM,BUT TAGGED UP SOLID.LANDING COLLAR AT 11,525'DP MEASUREMENT.POH WITH NO PROBLEMS. 11:00 - 13:00 2.00 CASING N DPRB RUNPRD M/U AND RIH WITH 3"BAILER.TAG AT 11,390'. CUT THROUGH SEVERAL BRIDGES AND STOP MAKING HOLE AT 11,480'SLM.POH. RECOVERED SAND AND CEMENT FROM BAILER. 13:00 - 14:00 1.00 CASING N DPRB RUNPRD RID`SCHLUMBERGER'SLICKLINE. 14:00 - 15:00 1.00 CASING N DPRB. RUNPRD R/U SCHLUMBERGER E-LINE AND M/U USIT TOOLS. 15:00 - 19:30 4.50 EVAL P RUNPRD PJSM -RIH T/10820'-SLM W/USIT TOOL AND LOG T/ SURFACE IN CEMENT MODE. -POH T/SURFACE W/SLB USIT TOOL&L/D LOGGING TOOLS. `-MONITOR WELL(STATIC) 19:30 - 23:00 3.50 RUNCOM P RUNCMP DRAIN BOP STACK. -PULL WEAR BUSHING. -MAKE DUMMY RUN W/TBG HANGAR,36.20' RKB. -R/U 4.5"TBG RUNNING EQUIPMENT. -PJSM. -RUN 4.5"COMPLETION. 23:00 00:00 1.00 RUNCOM P RUNCMP P/U&RIH W/4-1/2", 12.6 LB-FT VAM TOP TBG T/165-MD, BAKERLOK CONNECTIONS BELOW PACKER.APPLY JET-LUBE SEAL • GUARD TO CONNECTION.M/U TO OPTIMUM TRQ BY TRQ TURN EACH JNT T/4,440 FT-LB. 8/7/2011 00:00 - 02:00 2.00 RUNCOM P RUNCMP INSPECT R/U OF EQUIPMENT.REVIEW BRIDGING DOC W/NON-SHEARABLE EQUIPMENT ACROSS BOPE. -M/U SHEAR JNT. -VERIFY 4-1/2"JNT COUNT&JEWLERY WITH NEW CREW. -RUN 10 JNTS OF 4-1/2", 12.6 LB-FT VAM TOP TBG W/COMPENSATOR. -HOLD AAR&DISCUSS BETTER PRACTICES. M/U SHEAR JNT.VERIFY 4-1/2"JNT COUNT& JEWLERY WITH NEW CREW DUE TO TOUR-CHANGE. 02:00 - 12:00 10.00 RUNCOM P RUNCMP CONTINUE RIH F/3,400'-MD W/4-1/2",12.6 LB-FT VAM TOP TBG F/586'T/6,970'-MD APPLY JET-LUBE SEAL GUARD TO CONNECTIONS.TRQ-TURN EACH JNT T/4,440 FT-LB OPTIMUM M/U TRQ. P/U WT. 114K-LBS, 5/0 WT.86K-LBS. MW IN 8.5-PGG 12:00 - 17:00 5.00 RUNCOM P RUNCMP CONTINUE RIH W/4.5"12.6#VT TB F/ 6,970'-MD T/10,800'-MD,M/U TORQUE 4,400-LBS. -MONITOR DISPLACEMENT VIA TRIP TANK. -M/U JNT.#253. Printed 9/6/2011 1:17:26PM 'NO . =erica ALAS °€ BP '1 POW Ott,, �`t 4 ti's eta 06/' [ F '• i pera io nP ummary`Repot ,- E r Common Well Name:A-25 AFE No Event Type: COM-ONSHORE(CON) Start Date: 7/26/2011 End Date: X3-00XM8-C:(1,365,903.00) Project: Prudhoe Bay Site: PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 17:00 - 19:30 2.50 RUNCOM P RUNCMP OBTAIN PARAMETERS, P/U WT. 180K-LBS, 1 S/O WT. 105K-LBS. -NO-GO @ 10,840'-MD=30'JNT.#253. -L/D JNT.#253 252,251. -M/U SPACE OUT PUPS 19.85'&5.83',JNT. #251,TBG HANGAR,&LANDING JNT. -DRAIN BOP STACK. -LAND TBG HANGAR&RILDS,WLEG BTM 10;833'-MD,WLEG STUNG INTO WLEG RECEPTACLE 7'. 19:30 - 21:00 1.50 CLEAN P RUNCMP R/U TO REVERSE CIRC&PUMP CORROSION INHIBITED FLUID. -PJSM TO REV.CIRCULATE&PT LINES. 21:00 - 00:00 3.00 CLEAN P RUNCMP P/T LINES T/250-PSI LOW/ 3,500-PSI HIGH -REVERSE CIRC 167-BBL 100-F"8.6-PPG 2% KCL,252-BBL 100-F"8.6-PPG KCL W/ CORROSION INHIBITOR,223-BBL 100-F" 8.6-PPG KCL @ 1-BPM 154-PSI,2-BPM 213-PSI,3-BPM 250-PSI,4-BPM 335-PSI. -PUMP 5-BBL DN TBG,RETURNS OUT IA @ 3-BPM 280-PSI AFTER DISPLACMENT TO CLEAN RHC PROFILE. -DROP BALL&ROD. 8/8/2011 00:00 - 02:00 2.00 RUNCOM P RUNCMP PRESSURE UP TBG T/250-PSI LO W FOR 5 MIN,3,500-PSI FOR 30 CHARTED MIN TEST -GOOD-WTL APPROVAL TO CONTINUE OPERATIONS.BLEED TBG PSI T/1,600-PSI. PRESSURE UP ANNULUS T/3,000-PSI. OBSERVE PRESSURE COMMUNICATION TO TBG.BLEED BOTH TBG AND ANNULUS PRESSURE. RE-PRESSURE AND AGAIN OBSERVE PSI COMMUNICATION TO TBG. BLEED ALL PSI AND CHECK SURFACE EQUIP. AND VALVES FOR POSSIBLE FAILURE. NO ISSUES FOUND AT SURFACE. 02:00 - 02:30 0.50 RUNCOM N DPRB 10,833.00 RUNCMP CONSULT ODE AND WTL FOR FORWARD PLAN.MOBILIZE SLICKLINE FOR RIH W/ DUMMY VALVE TO DCR SHEAR VALVE. 02:30 - 05:00 2.50 RUNCOM N DPRB 10,833.00 RUNCMP WHILE WAITING ON SLICKLINE -CUT&SLIP DRILLING LINE. -PREP RIG FOR MOVE TO 18-12C -PREPARE TO N/D BOPE. 05:00 - 06:00 1.00 RUNCOM N DPRB 10,833.00 RUNCMP SPOT IN SLB SLICKLINE UNIT. -PJSM. -R/U SLB SLICKLINE. 06:00 - 09:30 3.50 RUNCOM N DPRB 10,833.00 RUNCMP RIH W/SLB SLICKLINE 4.5"SSCS/T 4,365' -SLM, SHEAR OFF&PICK UP CLEAN. -POOH W/SLB SLICKLINE. -RIH W/SLB SLICKLINE&RETRIEVE DCR SHEAR VALVE F/4,249'-MD. -RIH W/SLB SLICKLINE&SET DGLV @ 4267'-SLM, POOH. 09:30 - 10:30 1.00 RUNCOM N DPRB 10,833.00 RUNCMP R/U TEST EQUIP.&TEST IA T/250-PSI 5-MIN. 3,500-PSI 30 MIN.CHARTED,TEST GOOD- WTL APPROVAL TO CONTINUE OPERATIONS -R/D TEST EQUIP. 10:30 - 11:30 1.00 RUNCOM N DPRB 10,833.00 RUNCMP RIH W/SLB SLICKLINE&RETRIEVE DGLV F/ 4,249'-MD, POOH. -RIH W/SLB SLICKLINE&RETRIEVE 4.5"SSCS F/4,365'-SLM, POOH. Printed 9/6/2011 1:17:26PM r �¢ NO 610 m- A `44 3 � $ ? t � �." Operatio ary.Rep � � � Common Well Name:A-25 AFE No Event Type:COM-ONSHORE(CON) Start Date:7/26/2011 End Date: X3-00XM8-C: (1,365,903.00) Project: Prudhoe Bay Site:PB A Pad Rig Name/No.: DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release:8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:30 - 12:00 0.50 RUNCOM P RUNCMP R/D SLB SLICKLINE. -R/U CIRC.EQUIP. -PUMP DN.TBG.2-BPM 100-PSI,PUMP DN.IA 2-BPM 100-PSI -R/D CIRC.EQUIP. 12:00 - 13:00 1.00 RUNCOM P RUNCMP CIRC.2 BBL DN.TBG.TAKE RETURNS OUT IA @ 2-BPM 105-PSI. -SWAP VALVES&REV.CIRC.2-BBL @ 2-BPM 105-PSI. -MONITOR WELL(STATIC). R/D'LND.JNT.&DRAIN BOP STACK. 13:00 - 14:30 1.50 RUNCOM P RUNCMP SET H-TYPE TWC W/T-BAR. -R/U TEST EQUIP,-TEST 250-PSI LOW 3,500-PSI HIGH F/ ABOVE,TEST FAILED. -RID TEST EQUIP. 14:30 - 16:00 1.50 RUNCOM P RUNCMP PJSM. -M/U DUTCH RISER. 16:00 - 17:00 1.00 RUNCOM P RUNCMP PM ON CAT HEAD'S. -MAN DN. DRILL 1-MIN.54 SEC.RESPONSE TIME. -WAIT ON DUTCH RISER XO&LUBRICATOR QUICK TEST SUB. 17:00 - 23:00 6.00 RUNCOM P RUNCMP R/U DSM LUBRICATOR. -SHELL TEST LUBRICATOR 500-PSI 5-MIN. 3,500-PSI 5-MIN.CHARTED. -M/U DSM TOOL STRING. -TEST LUBRICATOR QUICK TEST SUB 5,000-PSI -PULL&UD TWC,0-PSI BACKSIDE. -M/U NEW TWC. -M/U LUBRICATOR&QUICK TEST SUB 5,000-PSI -SET NEW TWC. -TEST TWC F/ABOVE 250-PSI 5-MIN. 3,500-PSI 5-MIN. CHARTED. -TEST TWC F/BELOW 250-PSI 5-MIN. 3,500-PSI 5-MIN. CHARTED. -R/D DSM LUBRICATOR. -R/D DUTCH RISER. 23:00 - 00:00 1.00 RUNCOM P RUNCMP B/D MUD LINES. -VAC OUT BOP STACK. -PULL PS-21 SLIPS. 8/9/2011 00:00 - 01:30 1.50 BOPSUB P RUNCMP N/D BOPE -CLEAN PITS 01:30 - 02:30 1.00 WHSUR P RUNCMP R/D SCAFFOLDING IN WELL HOUSE -PREP RIG FLOOR EQUIPMENT TO LAY OVER THE DERRICK -PREP DERRICK TO SCOPE DOWN 02:30 - 06:00 3.50 WHSUR P RUNCMP N/U TREE -TEST VOID ON TBG HANGER 250 PSI LOW FOR 5 MIN/5,000 PSI HIGH FOR 10 MIN- PASS -TEST TREE 250 PSI LOW FOR 5 MIN/5,000 PSI HIGH FOR 10 MIN-PASS 06:00 - 08:00 2.00 WHSUR P RUNCMP R/U LUBRICATOR. -TEST LUBRICATOR 250 PSI LOW/3,500 PSI HIGH FOR 5 MIN-GOOD TEST -PULL TWC Printed 9/6/2011 1:17:26PM n3 Y •. urn inTNI;:eribli f1=30, a ` Common Well Name:A-25 AFE No Event Type: COM-ONSHORE(CON) Start Date: 7/26/2011 End Date: X3-00XM8-C: (1,365,903.00) Project: Prudhoe Bay Site:PB A Pad Rig Name/No.:DOYON 25 Spud Date/Time: 11/16/2001 12:00:00AM Rig Release: 8/9/2011 Rig Contractor: DOYON DRILLING INC. UWI:500292076400 Active Datum:A-25B @90.32ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:00 - 08:30 0.50 WHSUR P RUNCMP PJSM.R/U TO FREEZE PROTECT 08:30 - 10:30 2.00 WHSUR P RUNCMP TEST LINES 2,000 PSI -PUMP 140 BBL FREEZE PROTECT DOWN IA &ALLOW TO U-TUBE,60-PSI ON TBG 60-PSI ON IA -BLEED PRESSURE OFF TBG&IA -MONITOR IA&TBG(STATIC) -RID CIRC EQUIPMENT LOWER CATTLE CHUTE TO DP SHED 10:30 - 12:00 1.50 WHSUR P RUNCMP 'DRY ROD IN BPV W/T-BAR -TEST BPV FROM BELOW TO 250 PSI LOW/ 2,000 PSI HIGH FOR 5 MIN-GOOD TEST -SCOPE DERRICK DOWN RELEASE RIG ON 8/9/11 @ 12:00-HRS Printed 9/6/2011 1.17:25PM • A-25B, Well History (Post Rig Sidetrack) Date Summary 08/19/11 T/I/O=0/0/0; Conduct PJSM; Install Annulus Valve on the opposite side of existing I/A valve;Torque to specs.w/digital torque wrench set to 523 ft/lbs; Install VR lubricator and shell test to 300 and 4400 psi (max pump output)for 5 min. (passed&charted); Remove lubricator and install flange;Torque and PT to 300 and 5000 psi for 5 min. (passed); No Problems 09/27/11 T/I/O=0/0/0; Conduct PJSM;Test barriers to 3500 psi for 5 min. (passed); Install lubricator w/pulling tool and test against SV to 300&3500 psi for 5 min. (passed); Pull 4-1/16" CIW "H" BPV#280 thru tree for Doyon 25 post drill; 1-1'ext. used,tagged @ 114"; RDMO;Test tree cap to 500 psi for 5 min. (passed); No Problems 10/02/11 WELL S/I ON ARRIVAL. RIG UP SWCP 4516 TO SET 1-1/2" GENERIC GAS LIFT DESIGN. 10/03/11 PULLED B&R FROM 4-1/2" RHC PLUG BODY Q 10,821' MD. PULLED RK-DGLV FROM ST#4(6,606' MD/6589' SLM). SET RK-LGLV AT ST#5(4,249' MD/4228'SLM)& RK-OGLV AT?ST#4(6,606' MD/ 6589'SLM). PULLED EMPTY 4-1/2" RHC PLUG BODY FROM 10,801' SLM/10,821' MD.'DRIFT TO 11,330' SLM W/3-3/8"x 12' DUMMY GUN, S-BLR(No sample). WELL S/I ON DEPARTURE, NOTIFIED PAD OPERATOR OF WELL STATUS. 10/06/11 WELL SHUT IN ON ARRIVAL. T/I/O=390/340/0 PSI. ARRIVE TO LOCATION. GET PERMIT SIGNED. HOLD SAFETY MEETING. CHECK TOOLSTRING AT SURFACE. PT LUBRICATOR. BEGIN TO RIH WITH SCMT TOOLSTRING. 10/07/11 FINAL T/I/O=530/490/0 PSI. KEPT RIH WITH TOOLSTRING. TAGGED TD AT 11367'. BEGAN FIRST UP PASS FROM TD(10760')AT 30 FPM AND TIED IN TO 4.5" PRODUCTION LINER SUMMARY DATED 1-AUG-2011. PERFORMED ANOTHER UP PASS FROM TD(6000')AT 30 FPM TO GET A JEWELRY LOG FOR FUTURE REFERENCE. NOTICED 1 CENTRALIZER ON JT 1&2, 17&18 WITH ONE STOP RING. PERFORMED A WELL CONTROL AND H2S DRILL WHILE POOH. RIG DOWN, PERFORMED POST JOB TOOLSTRING CHECK AT SURFACE. CLOSE PERMIT AND LEFT LOCATION. FINAL T/I/O=530/490/0 PSI. JOB COMPLETE. WELL SHUT IN UPON DEPARTURE. 10/08/11 WELL SHUT IN ARRIVAL. INITIAL T/I/O 200/225/0 RUN 1: 5FT,6 SPF, 3-3/8 PJ 3406 GUN- INTERVAL 11280' 11285' PENETRATION 36.5 ENT HOLE=0.37" TAGGED PBTD AT 11320. BEFORE PERF T/I/O 425/225/0,AFTER PERF T/I/O 440/225/0 WELL TURNED OVER TO DSO. FINAL T/I/O 300/225/0 JOB COMPLETE. 10/11/11 T/I/O= 1280/1610/60.Temp=SI. WHPs T&IA FL(Pre-Eline). AL open C© casing valve,ALP= 1610 psi. T FL C© surface. IA FL CO 528' (30 bbls). 10/23/11 WELL S/I ON ARRIVAL. RAN 3.50" CENT&2.50" SAMPLE BAILER,TAGGED STICKY BOTTOM Q 11,358' SLM/11,394' MD(109' rathole, bottom perf © 11,285'). BAILER EMPTY. RAN 2.50" CENT& 1.50" SAMPLE BAILER, SD © SAME DEPTH, OBTAIN SAMPLE OF DRILLING MUD. RDMO. WELL S/I ON DEPARTURE, PAD OP NOTIFIED. Page 1 of 1 • • North America - ALASKA - BP Prudhoe Bay PB A Pad A-25 500292076400 A-25B Design: A-25B Survey Report - Geographic 04 August, 2011 0 • Survey Report-Geographic Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay ND Reference: A-25B @ 90.32ft(Doyon 25) Site: PB A Pad MD Reference: A-25B @ 90.32ft(Doyon 25) Well: A-25 North Reference: True Wellbore: A-25B Survey Calculation Method: Minimum Curvature Design: A-25B Database: EDM.16-ANC Prod-WH24P Project Prudhoe Bay,GPB,PRUDHOE BAY Map System: US State Plane 1927(Exact solution) System Datum: Mean Sea Level Geo Datum: NAD 1927(NADCON CONUS) Using Well Reference Point Map Zone: Alaska Zone 04 Using geodetic scale factor Site PB A Pad,TR-11-13 Site Position: Northing: 5,946,131.57ft Latitude: 70°15'35.209 N 'From: Map Easting: 653,509.42ft Longitude: 148°45'32.775 W Position Uncertainty: 0.00 ft Slot Radius: 0.000 in Grid Convergence: 1.17 ° Well A-25 API No 500292076400 Well Position +N/-S 0.00 ft Northing: 5,947,780.00 ft Latitude: 70°15'51.382 N +E/-W 0.00 ft Easting: 653,697.00 ft Longitude: 148°45'26.338 W Position Uncertainty 0.00 ft Wellhead Elevation: 51.98 ft Ground Level: 50.48 ft Wellbore A-25B API No 50029207640200 Magnetics Model Name Sample Date Declination Dip Angle Field Strength (°) (°) (nT) BGGM2011 7/14/2011 21.44 80.97 57,660 Design A-25B Audit Notes: Version: Phase: ACTUAL Tie On Depth: 8,152.62 Vertical Section: Depth From(TVD) +N/-S +E/-W Direction (ft) (ft) (ft) (°) 38.34 0.00 0.00 32.80 Survey Program Date: 8/4/2011 From To (ft) (ft) Survey(Wellbore) Tool Name Description 102.62 8,152.62 A-25 Gyrodata(A-25) GYD-CT-CMS Gyrodata cont.casing m/s 8,179.00 8,375.44 MWD Run 300 Interpolated Azimuth(A-25B) INC+TREND Inclinometer+known azi trend 8,470.18 10,944.95 MWD Run 300(A-25B) MWD+IFR+MS MWD+IFR+Multi Station 10,990.86 10,990.86 MWD Run 400 Interpolated Azimuth(A-25B) INC+TREND Inclinometer+known azi trend 11,085.81 11,558.94 MWD Run 400(A-25B) MWD+IFR+MS MWD+IFR+Multi Station 8/4/2011 3:59:26PM Page 2 COMPASS 2003.16 Build 73 • • Survey Report-Geographic Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: A-25B @ 90.32ft(Doyon 25) Site: PB A Pad MD Reference: A-25B @ 90.32ft(Doyon 25) Well: A-25 North Reference: True Wellbore: A-25B Survey Calculation Method: Minimum Curvature Design: A-25B Database: EDM.16-ANC Prod-WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +N/-S +E/-W Northing Easting (ft) (°) (0) (ft) (ft) (ft) (ft) (ft) Latitude Longitude 38.34 0.00 0.00 38.34 0.00 0.00 5,947,780.00 653,697.00 70°15'51.382 N 148°45'26.338 W 102.62 0.33 132.14 102.62 -0.13 0.14 5,947,779.88 653,697.14 70°15'51.380 N 148°45'26.334 W 202.62 0.28 99.79 202.62 -0.36 0.59 5,947,779.65 653,697.60 70°15'51.378 N 148°45'26.321 W 302.62 0.09 339.05 302.62 -0.33 0.81 5,947,779.69 653,697.81 70°15'51.378 N 148°45'26.315 W 402.62 0.56 38.70 402.62 0.13 1.08 5,947,780.15 653,698.08 70°15'51.383 N 148°45'26.307 W 503.62 1.90 12.20 503.59 2.16 1.75 5,947,782.19 653,698.70 70°15'51.403 N 148°45'26.287 W 602.62 5.41 26.08 602.38 7.95 4.15 5,947,788.04 653,700.98 70°15'51.460 N 148°45'26.218 W 702.62 6.53 20.07 701.83 17.52 8.17 5,947,797.69 653,704.81 70°15'51.554 N 148°45'26.101 W 802.62 7.54 26.08 801.08 28.75 13.00 5,947,809.01 653,709.41 70°15'51.664 N 148°45'25.960 W 902.62 8.97 28.29 900.04 41.51 19.58 5,947,821.90 653,715.73 70°15'51.790 N 148°45'25.768 W 1,002.62 9.00 26.93 998.82 55.35 26.82 5,947,835.88 653,722.68 70°15'51.926 N 148°45'25.558 W 1,102.62 9.17 30.38 1,097.56 69.20 34.39 5,947,849.88 653,729.97 70°15'52.062 N 148°45'25.337 W 1,152.62 10.02 32.93 1,146.86 76.28 38.77 5,947,857.05 653,734.20 70°15'52.132 N 148°45'25.210 W 1,202.62 11.83 36.44 1,195.96 84.06 44.18 5,947,864.94 653,739.45 70°15'52.208 N 148°45'25.053 W 1,252.62 13.42 38.75 1,244.75 92.71 50.85 5,947,873.72 653,745.95 70°15'52.293 N 148°45'24.858 W 1,302.62 14.63 38.71 1,293.25 102.16 58.43 5,947,883.32 653,753.33 70°15'52.386 N 148°45'24.638 W 1,352.62 15.68 38.78 1,341.52 112.35 66.61 5,947,893.68 653,761.30 70°15'52.487 N 148°45'24.400 W 1,402.62 15.99 38.94 1,389.62 122.98 75.17 5,947,904.48 653,769.64 70°15'52.591 N 148°45'24.151 W 1,452.62 16.13 38.93 1,437.67 133.74 83.87 5,947,915.41 653,778.11 70°15'52.697 N 148°45'23.897 W 1,502.62 16.24 38.37 1,485.68 144.62 92.57 5,947,926.47 653,786.59 70°15'52.804 N 148°45'23.644 W 1,552.62 16.24 37.08 1,533.69 155.68 101.13 5,947,937.70 653,794.92 70°15'52.913 N 148°45'23.395 W 1,602.62 16.36 36.88 1,581.68 166.89 109.57 5,947,949.08 653,803.13 70°15'53.023 N 148°45'23.149 W 1,652.62 16.71 36.09 1,629.61 178.33 118.03 5,947,960.69 653,811.35 70°15'53.136 N 148°45'22.903 W 1,702.62 16.92 34.45 1,677.48 190.14 126.38 5,947,972.66 653,819.46 70°15'53.252 N 148°45'22.660 W 1,752.62 17.16 31.57 1,725.28 202.42 134.35 5,947,985.11 653,827.18 70°15'53.372 N 148°45'22.428 W 1,802.62 17.71 29.44 1,772.98 215.33 141.95 5,947,998.17 653,834.52 70°15'53.499 N 148°45'22.207 W 1,852.62 18.56 26.38 1,820.50 229.08 149.23 5,948,012.06 653,841.51 70°15'53.635 N 148°45'21.995 W 1,902.62 20.90 22.18 1,867.56 244.47 156.13 5,948,027.59 653,848.10 70°15'53.786 N 148°45'21.794 W 1,952.62 23.56 21.05 1,913.84 262.06 163.09 5,948,045.32 653,854.69 70°15'53.959 N 148°45'21.592 W' 2,002.62 26.67 21.04 1,959.11 281.87 170.71 5,948,065.28 653,861.91 70°15'54.154 N 148°45'21.370 W 2,052.62 28.55 21.30 2,003.41 303.48 179.08 5,948,087.05 653,869.83 70°15'54.366 N 148°45'21.126 W 2,102.62 29.87 21.40 2,047.05 326.20 187.96 5,948,109.95 653,878.25 70°15'54.590 N 148°45'20.868 W 2,152.62 31.39 22.19 2,090.08 349.86 197.42 5,948,133.79 653,887.22 70°15'54.822 N 148°45'20.593 W 2,202.62 34.02 22.36 2,132.15 374.85 207.66 5,948,158.99 653,896.95 70°15'55.068 N 148°45'20.295 W 2,252.62 37.10 22.91 2,172.82 401.68 218.86 5,948,186.04 653,907.60 70°15'55.332 N 148°45'19.969 W 2,302.62 38.41 23.89 2,212.35 429.78 231.02 5,948,214.37 653,919.18 70°15'55.608 N 148°45'19.615 W 2,352.62 38.24 24.97 2,251.57 458.01 243.85 5,948,242.86 653,931.43 70°15'55.886 N 148°45'19.241 W 2,402.62 38.33 25.69 2,290.82 486.01 257.10 5,948,271.12 653,944.10 70°15'56.161 N 148°45'18.856 W 2,452.62 40.29 25.85 2,329.50 514.53 270.87 5,948,299.92 653,957.29 70°15'56.442 N 148°45'18.455 W 2,502.62 43.65 26.76 2,366.67 544.50 285.69 5,948,330.18 653,971.49 70°15'56.737 N 148°45'18.023 W 2,552.62 47.06 26.87 2,401.80 576.24 301.74 5,948,362.24 653,986.89 70°15'57.049 N 148°45'17.556 W 2,602.62 49.98 27.50 2,434.92 609.56 318.85 5,948,395.89 654,003.32 70°15'57.377 N 148°45'17.058 W 2,652.62 52.48 27.24 2,466.23 644.18 336.77 5,948,430.87 654,020.53 70°15'57.717 N 148°45'16.537 W 2,702.62 52.96 27.49 2,496.51 679.51 355.06 5,948,466.56 654,038.09 70°15'58.065 N 148°45'16.004 W 2,752.62 52.82 27.99 2,526.68 714.80 373.62 5,948,502.23 654,055.92 70°15'58.412 N 148°45'15.464 W 2,802.62 52.65 28.04 2,556.95 749.93 392.31 5,948,537.73 654,073.89 70°15'58.757 N 148°45'14.920 W 2,852.62 52.21 28.22 2,587.44 784.88 410.99 5,948,573.05 654,091.85 70°15'59.101 N 148°45'14.376 W 2,902.62 52.02 28.25 2,618.14 819.65 429.66 5,948,608.19 654,109.81 70°15'59.443 N 148°45'13.833 W 2,952.62 52.30 28.58 2,648.81 854.38 448.45 5,948,643.29 654,127.88 70°15'59.784 N 148°45'13.286 W 3,002.62 52.11 28.48 2,679.46 889.09 467.32 5,948,678.38 654,146.04 70°16'0.126 N 148°45'12.736 W 3,052.62 51.75 28.54 2,710.29 923.68 486.11 5,948,713.34 654,164.12 70°16'0.466 N 148°45'12.190 W 3,102.62 51.95 28.46 2,741.17 958.23 504.88 5,948,748.27 654,182.17 70°16'0.806 N 148°45'11.643 W 3,152.62 51.48 28.43 2,772.15 992.74 523.57 5,948,783.15 654,200.16 70°16'1.145 N 148°45'11.099 W 3,202.62 51.54 28.74 2,803.27 1,027.11 542.29 5,948,817.89 654,218.18 70°16'1.483 N 148°45'10.554 W 3,252.62 51.46 29.12 2,834.40 1,061.35 561.22 5,948,852.51 654,236.40 70°16'1.820 N 148°45'10.003 W 8/4/2011 3:59:26PM Page 3 COMPASS 2003.16 Build 73 • • Survey Report-Geographic ;; 3.*... w.� Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: A-25B @ 90.32ft(Doyon 25) Site: PB A Pad MD Reference: A-25B @ 90.32ft(Doyon 25) Well: A-25 North Reference: True Wellbore: A-25B Survey Calculation Method: Minimum Curvature Design: A-25B Database: EDM.16-ANC Prod-WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +N/-S +El-W Northing Easting (ft) (°) (°) (ft) (ft) (ft) (ft) (ft) Latitude Longitude 1 3,302.62 51.53 28.95 2,865.53 1,095.56 580.21 5,948,887.10 654,254.69 70°16'2.156 N 148°45'9.450 W 3,352.62 51.29 29.00 2,896.72 1,129.75 599.14 5,948,921.66 654,272.91 70°16'2.492 N 148°45'8.899 W, 3,402.62 50.62 28.99 2,928.21 1,163.71 617.97 5,948,956.00 654,291.04 70°16'2.826 N 148°45'8.351 W 3,452.62 50.83 29.00 2,959.87 1,197.57 636.73 5,948,990.23 654,309.10 70°16'3.159 N 148°45'7.805 W 3,502.62 50.27 28.53 2,991.64 1,231.41 655.31 5,949,024.44 654,326.99 70°16'3.492 N 148°45'7.264 W 3,552.62 50.12 28.52 3,023.65 1,265.16 673.65 5,949,058.56 654,344.63 70°16'3.824 N 148°45'6.730 W 3,602.62 49.65 28.76 3,055.86 1,298.72 691.98 5,949,092.48 654,362.27 70°16'4.154 N 148°45'6.197 W 3,652.62 49.37 28.71 3,088.33 1,332.07 710.26 5,949,126.19 654,379.87 70°16'4.482 N 148°45'5.664 W 3,702.62 49.14 28.44 3,120.96 1,365.33 728.38 5,949,159.81 654,397.31 70°16'4.809 N 148°45'5.137 W. 3,752.62 48.74 28.54 3,153.81 1,398.46 746.36 5,949,193.31 654,414.61 70°16'5.135 N 148°45'4.613 W' 3,802.62 48.52 29.02 3,186.85 1,431.35 764.43 5,949,226.55 654,431.99 70°16'5.459 N 148°45'4.087 W 3,852.62 48.37 29.16 3,220.02 1,464.05 782.61 5,949,259.61 654,449.51 70°16'5.780 N 148°45'3.558 W 3,902.62 48.01 29.20 3,253.36 1,496.59 800.78 5,949,292.51 654,467.01 70°16'6.100 N 148°45'3.029 W' 3,952.62 47.74 29.16 3,286.89 1,528.97 818.86 5,949,325.25 654,484.42 70°16'6.419 N 148°45'2.503 W 4,002.62 47.66 29.12 3,320.55 1,561.27 836.87 5,949,357.91 654,501.76 70°16'6.736 N 148°45'1.978 W 4,052.62 47.32 29.13 3,354.33 1,593.46 854.81 5,949,390.46 654,519.04 70°16'7.053 N 148°45'1.456 W; 4,102.62 47.05 29.11 3,388.31 1,625.51 872.65 5,949,422.86 654,536.23 70°16'7.368 N 148°45'0.937 W 4,152.62 47.00 29.25 3,422.40 1,657.45 890.49 5,949,455.16 654,553.41 70°16'7.682 N 148°45'0.417 W 4,202.62 47.17 29.03 3,456.44 1,689.43 908.32 5,949,487.50 654,570.58 70°16'7.997 N 148°44'59.898 W 4,252.62 47.56 28.91 3,490.30 1,721.61 926.14 5,949,520.03 654,587.74 70°16'8.313 N 148°44'59.379 W i 4,302.62 48.61 29.12 3,523.71 1,754.15 944.18 5,949,552.93 654,605.11 70°16'8.633 N 148°44'58.854 W 4,352.62 50.00 28.61 3,556.31 1,787.35 962.48 5,949,586.49 654,622.73 70°16'8.960 N 148°44'58.321 W 4,402.62 51.21 28.75 3,588.04 1,821.25 981.03 5,949,620.76 654,640.57 70°16'9.293 N 148°44'57.781 W 4,452.62 52.76 29.20 3,618.84 1,855.71 1,000.11 5,949,655.60 654,658.95 70°16'9.632 N 148°44'57.226 W 4,502.62 53.74 28.91 3,648.75 1,890.73 1,019.56 5,949,691.01 654,677.68 70°16'9.976 N 148°44'56.659 W 4,552.62 54.09 29.03 3,678.20 1,926.08 1,039.13 5,949,726.75 654,696.52 70°16'10.324 N 148°44'56.089 WI 4,602.62 53.93 29.24 3,707.58 1,961.42 1,058.83 5,949,762.48 654,715.49 70°16'10.671 N 148°44'55.516 W 4,652.62 53.61 29.15 3,737.13 1,996.63 1,078.50 5,949,798.08 654,734.44 70°16'11.018 N 148°44'54.943 W 4,702.62 53.69 28.97 3,766.76 2,031.83 1,098.06 5,949,833.68 654,753.28 70°16'11.364 N 148°44'54.373 W 4,752.62 53.50 29.01 3,796.43 2,067.04 1,117.57 5,949,869.27 654,772.06 70°16'11.710 N 148°44'53.806 W 4,802.62 53.11 29.06 3,826.31 2,102.09 1,137.02 5,949,904.71 654,790.79 70°16'12.055 N 148°44'53.239 W 4,852.62 52.76 28.79 3,856.45 2,137.01 1,156.32 5,949,940.01 654,809.37 70°16'12.398 N 148°44'52.677 W 4,902.62 52.86 28.65 3,886.67 2,171.94 1,175.46 5,949,975.32 654,827.79 70°16'12.742 N 148°44'52.120 WI 4,952.62 52.35 28.78 3,917.04 2,206.78 1,194.55 5,950,010.54 654,846.16 70°16'13.084 N 148°44'51.564 W' 5,002.62 52.27 28.80 3,947.61 2,241.45 1,213.60 5,950,045.59 654,864.50 70°16'13.425 N 148°44'51.009 W 5,052.62 52.11 28.79 3,978.26 2,276.07 1,232.63 5,950,080.59 654,882.82 70°16'13.766 N 148°44'50.455 W 5,102.62 52.02 28.59 4,009.00 2,310.66 1,251.56 5,950,115.56 654,901.04 70°16'14.106 N 148°44'49.904 W 5,152.62 51.74 28.45 4,039.87 2,345.22 1,270.34 5,950,150.49 654,919.11 70°16'14.446 N 148°44'49.357 W 5,202.62 51.52 28.28 4,070.90 2,379.72 1,288.97 5,950,185.36 654,937.03 70°16'14.785 N 148°44'48.814 W 5,252.62 51.26 28.34 4,102.10 2,414.11 1,307.50 5,950,220.12 654,954.85 70°16'15.123 N 148°44'48.275 W 5,302.62 51.06 28.16 4,133.46 2,448.42 1,325.94 5,950,254.80 654,972.58 70°16'15.461 N 148°44'47.738 W 5,352.62 50.90 28.08 4,164.94 2,482.68 1,344.25 5,950,289.42 654,990.19 70°16'15.798 N 148°44'47.205 W 5,402.62 50.12 28.41 4,196.74 2,516.67 1,362.50 5,950,323.78 655,007.75 70°16'16.132 N 148°44'46.673 W 5,452.62 50.55 28.12 4,228.65 2,550.58 1,380.73 5,950,358.04 655,025.28 70°16'16.465 N 148°44'46.142 W 5,502.62 50.32 28.29 4,260.50 2,584.54 1,398.95 5,950,392.37 655,042.80 70°16'16.799 N 148°44'45.612 W 5,552.62 49.78 28.03 4,292.60 2,618.34 1,417.04 5,950,426.53 655,060.19 70°16'17.132 N 148°44'45.085 W 5,602.62 49.69 28.44 4,324.92 2,651.95 1,435.09 5,950,460.50 655,077.55 70°16'17.462 N 148°44'44.559 W 5,652.62 49.64 28.31 4,357.28 2,685.48 1,453.20 5,950,494.39 655,094.97 70°16'17.792 N 148°44'44.032 W 5,702.62 49.48 28.37 4,389.72 2,718.98 1,471.26 5,950,528.24 655,112.35 70°16'18.121 N 148°44'43.506 W' 5,752.62 48.80 28.41 4,422.43 2,752.24 1,489.24 5,950,561.87 655,129.64 70°16'18.448 N 148°44'42.982 W 5,802.62 48.99 28.10 4,455.30 2,785.43 1,507.08 5,950,595.41 655,146.80 70°16'18.775 N 148°44'42.462 W 5,852.62 48.76 28.30 4,488.18 2,818.62 1,524.88 5,950,628.96 655,163.92 70°16'19.101 N 148°44'41.944 W 5,902.62 48.63 28.30 4,521.18 2,851.70 1,542.69 5,950,662.38 655,181.04 70°16'19.426 N 148°44'41.425 W 5,952.62 48.65 31.46 4,554.23 2,884.23 1,561.38 5,950,695.29 655,199.06 70°16'19.746 N 148°44'40.881 W 6,002.62 48.86 33.02 4,587.19 2,916.03 1,581.44 5,950,727.49 655,218.47 70°16'20.059 N 148°44'40.297 WJ 8/4/2011 3:59:26PM Page 4 COMPASS 2003.16 Build 73 • • Survey Report-Geographic Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: A-25B @ 90.32ft(Doyon 25) Site: PB A Pad MD Reference: A-25B @ 90.32ft(Doyon 25) Well: A-25 North Reference: True Wellbore: A-25B Survey Calculation Method: Minimum Curvature Design: A-25B Database: EDM.16-ANC Prod-WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +N/-S +E/-W Northing Easting (ft) (°) (0) (ft) (ft) (ft) (ft) (ft) Latitude Longitude 6,052.62 48.59 36.09 4,620.17 2,946.97 1,602.75 5,950,758.86 655,239.14 70°16'20.363 N 148°44'39.676 W 6,102.62 48.38 39.08 4,653.32 2,976.64 1,625.58 5,950,788.98 655,261.36 70°16'20.655 N 148°44'39.012 W 6,152.62 47.73 42.54 4,686.74 3,004.78 1,649.87 5,950,817.61 655,285.07 70°16'20.932 N 148°44'38.304 W 6,202.62 48.01 45.18 4,720.29 3,031.51 1,675.56 5,950,844.86 655,310.21 70°16'21.195 N 148°44'37.556 W. 6,252.62 48.55 46.59 4,753.56 3,057.49 1,702.35 5,950,871.38 655,336.46 70°16'21.450 N 148°44'36.776 W 6,302.62 48.90 46.31 4,786.54 3,083.38 1,729.59 5,950,897.82 655,363.16 70°16'21.705 N 148°44'35.982 W 6,352.62 48.74 45.60 4,819.46 3,109.54 1,756.64 5,950,924.52 655,389.68 70°16'21.962 N 148°44'35.195 W 6,402.62 46.95 43.05 4,853.02 3,136.04 1,782.55 5,950,951.55 655,415.03 70°16'22.222 N 148°44'34.440 W 6,452.62 46.58 42.95 4,887.27 3,162.69 1,807.39 5,950,978.69 655,439.33 70°16'22.484 N 148°44'33.717 W 6,502.62 46.39 43.52 4,921.69 3,189.10 1,832.23 5,951,005.61 655,463.62 70°16'22.744 N 148°44'32.993 W 6,552.62 46.64 43.56 4,956.10 3,215.40 1,857.22 5,951,032.40 655,488.06 70°16'23.003 N 148°44'32.266 W 6,602.62 46.59 43.70 4,990.45 3,241.70 1,882.30 5,951,059.21 655,512.60 70°16'23.261 N 148°44'31.535 W 6,652.62 46.26 43.49 5,024.91 3,267.93 1,907.28 5,951,085.95 655,537.03 70°16'23.519 N 148°44'30.808 W 6,702.62 46.17 43.96 5,059.51 3,294.02 1,932.23 5,951,112.53 655,561.44 70°16'23.776 N 148°44'30.081 W 6,752.62 46.25 43.69 5,094.11 3,320.06 1,957.22 5,951,139.08 655,585.90 70°16'24.032 N 148°44'29.353 W 6,802.62 46.44 43.84 5,128.63 3,346.18 1,982.25 5,951,165.70 655,610.38 70°16'24.289 N 148°44'28.625 W 6,852.62 46.60 44.21 5,163.03 3,372.27 2,007.46 5,951,192.30 655,635.06 70°16'24.545 N 148°44'27.890 W 6,902.62 46.28 44.27 5,197.49 3,398.22 2,032.74 5,951,218.76 655,659.80 70°16'24.800 N 148°44'27.154 W 6,952.62 46.46 43.86 5,231.99 3,424.23 2,057.91 5,951,245.27 655,684.43 70°16'25.056 N 148°44'26.421 W 7,002.62 46.01 43.77 5,266.57 3,450.29 2,082.91 5,951,271.83 655,708.89 70°16'25.312 N 148°44'25.693 W 7,052.62 45.80 44.13 5,301.37 3,476.14 2,107.83 5,951,298.18 655,733.28 70°16'25.566 N 148°44'24.967 W 7,102.62 45.76 43.79 5,336.24 3,501.93 2,132.71 5,951,324.48 655,757.62 70°16'25.820 N 148°44'24.243 W 7,152.62 45.43 43.79 5,371.23 3,527.71 2,157.42 5,951,350.76 655,781.81 70°16'26.074 N 148°44'23.523 W 7,202.62 45.19 43.43 5,406.39 3,553.45 2,181.94 5,951,376.99 655,805.79 70°16'26.327 N 148°44'22.809 W 7,252.62 45.14 43.74 5,441.64 3,579.14 2,206.39 5,951,403.17 655,829.70 70°16'26.579 N 148°44'22.097 W 7,302.62 45.23 43.27 5,476.88 3,604.86 2,230.80 5,951,429.39 655,853.59 70°16'26.832 N 148°44'21.386 W 7,352.62 44.79 43.29 5,512.23 3,630.61 2,255.05 5,951,455.62 655,877.30 70°16'27.085 N 148°44'20.679 W 7,402.62 44.24 42.95 5,547.88 3,656.19 2,279.01 5,951,481.69 655,900.73 70°16'27.337 N 148°44'19.982 W 7,452.62 44.45 43.31 5,583.64 3,681.70 2,302.90 5,951,507.67 655,924.10 70°16'27.588 N 148°44'19.286 W' 7,502.62 44.05 42.96 5,619.46 3,707.16 2,326.75 5,951,533.61 655,947.42 70°16'27.838 N 148°44'18.591 W 7,552.62 44.13 42.80 5,655.37 3,732.65 2,350.43 5,951,559.58 655,970.57 70°16'28.089 N 148°44'17.901 W 7,602.62 45.09 43.01 5,690.96 3,758.38 2,374.33 5,951,585.78 655,993.94 70°16'28.341 N 148°44'17.205 W 7,652.62 46.78 42.87 5,725.73 3,784.68 2,398.80 5,951,612.58 656,017.87 70°16'28.600 N 148°44'16.492 W 7,702.62 48.88 42.78 5,759.30 3,811.86 2,423.99 5,951,640.26 656,042.50 70°16'28.867 N 148°44'15.759 W 7,752.62 49.98 42.94 5,791.82 3,839.70 2,449.83 5,951,668.63 656,067.76 70°16'29.141 N 148°44'15.006 W 7,802.62 51.17 42.87 5,823.57 3,867.99 2,476.12 5,951,697.45 656,093.47 70°16'29.419 N 148°44'14.240 W 7,852.62 51.54 43.31 5,854.79 3,896.51 2,502.80 5,951,726.50 656,119.55 70°16'29.700 N 148°44'13.463 W 7,902.62 51.39 43.21 5,885.94 3,924.99 2,529.60 5,951,755.52 656,145.77 70°16'29.980 N 148°44'12.683 W 7,952.62 51.17 42.94 5,917.22 3,953.49 2,556.24 5,951,784.55 656,171.82 70°16'30.260 N 148°44'11.907 W 8,002.62 50.84 43.01 5,948.68 3,981.92 2,582.73 5,951,813.52 656,197.72 70°16'30.539 N 148°44'11.135 W 8,052.62 50.78 42.85 5,980.28 4,010.29 2,609.13 5,951,842.42 656,223.53 70°16'30.818 N 148°44'10.366 W 8,102.62 50.15 43.13 6,012.10 4,038.50 2,635.42 5,951,871.16 656,249.24 70°16'31.096 N 148°44'9.600 W 8,152.62 49.88 42.80 6,044.23 4,066.53 2,661.54 5,951,899.72 656,274.78 70°16'31.371 N 148°44'8.839 W 8,179.00 49.92 42.73 6,061.22 4,081.35 2,675.24 5,951,914.81 656,288.17 70°16'31.517 N 148°44'8.440 W 8,281.41 48.24 38.11 6,128.32 4,140.20 2,725.42 5,951,974.67 656,337.13 70°16'32.096 N 148°44'6.979 W 8,375.44 47.51 33.71 6,191.41 4,196.65 2,766.31 5,952,031.94 656,376.87 70°16'32.651 N 148°44'5.787 W 8,470.18 46.82 29.15 6,255.84 4,255.89 2,802.53 5,952,091.90 656,411.87 70°16'33.233 N 148°44'4.732 W 8,565.60 44.55 22.45 6,322.53 4,317.26 2,832.28 5,952,153.85 656,440.36 70°16'33.8:36 N 148°44'3.865 W 8,600.04 44.49 23.26 6,347.09 4,339.51 2,841.66 5,952,176.29 656,449.28 70°16'34.055 N 148°44'3.592 W 8,695.96 40.43 25.82 6,417.84 4,398.41 2,868.49 5,952,235.73 656,474.90 70°16'34.634 N 148°44'2.810 W 8,754.75 39.56 25.63 6,462.88 4,432.45 2,884.90 5,952,270.09 656,490.60 70°16'34.969 N 148°44'2.332 W 8,849.00 36.22 25.57 6,537.25 4,484.65 2,909.90 5,952,322.78 656,514.54 70°16'35.482 N 148°44'1.603 W 8,943.56 33.00 27.67 6,615.07 4,532.67 2,933.93 5,952,371.28 656,537.58 70°16'35.955 N 148°44'0.903 W 9,037.56 29.72 26.79 6,695.33 4,576.15 2,956.32 5,952,415.21 656,559.08 70°16'36.382 N 148°44'0.250 W 9,133.95 26.44 22.63 6,780.37 4,617.30 2,975.36 5,952,456.73 656,577.27 70°16'36.787 N 148°43'59.695 W 8/4/2011 3:59:26PM Page 5 COMPASS 2003.16 Build 73 0 • Survey Report-Geographic Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: A-25B @ 90.32ft(Doyon 25) Site: PB A Pad MD Reference: A-25B @ 90.32ft(Doyon 25) Well: A-25 North Reference: True Wellbore: A-25B Survey Calculation Method: Minimum Curvature Design: A-25B Database: EDM.16-ANC Prod-WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +N/-S +E/-W Northing Easting (ft) (1 (°) (ft) (ft) (ft) (ft) (ft) Latitude Longitude 9,228.49 23.13 18.07 6,866.20 4,654.39 2,989.22 5,952,494.10 656,590.37 70°16'37.152 N 148°43'59.291 W 9,323.19 19.93 15.85 6,954.28 4,687.61 2,999.40 5,952,527.52 656,599.87 70°16'37.478 N 148°43'58.994 W 9,418.07 17.39 9.25 7,044.18 4,717.17 3,006.10 5,952,557.20 656,605.96 70°16'37.769 N 148°43'58.799 W 9,512.97 13.81 4.20 7,135.57 4,742.47 3,009.21 5,952,582.56 656,608.55 70°16'38.018 N 148°43'58.708 W 9,608.04 12.51 2.04 7,228.14 4,764.08 3,010.41 5,952,604.19 656,609.31 70°16'38.230 N 148°43'58.673 W1 9,701.85 11.84 352.65 7,319.85 4,783.78 3,009.54 5,952,623.87 656,608.04 70°16'38.424 N 148°43'58.698 W 9,797.20 11.79 347.40 7,413.18 4,802.99 3,006.16 5,952,643.00 656,604.27 70°16'38.613 N 148°43'58.796 W 9,891.78 13.01 336.56 7,505.57 4,822.19 2,999.82 5,952,662.07 656,597.54 70°16'38.802 N 148°43'58.981 W 9,986.21 12.46 335.03 7,597.67 4,841.18 2,991.29 5,952,680.87 656,588.62 70°16'38.989 N 148°43'59.229 W 10,081.22 12.78 327.55 7,690.40 4,859.34 2,981.32 5,952,698.83 656,578.29 70°16'39.167 N 148°43'59.519 W i 10,175.72 12.47 327.34 7,782.61 4,876.75 2,970.21 5,952,716.00 656,566.82 70°16'39.339 N 148°43'59.842 W 10,270.69 12.07 328.10 7,875.41 4,893.81 2,959.43 5,952,732.84 656,555.70 70°16'39.506 N 148°44'0.156 W 10,365.59 11.55 328.51 7,968.30 4,910.33 2,949.22 5,952,749.15 656,545.16 70°16'39.669 N 148°44'0.453 W 10,460.27 11.88 326.21 8,061.01 4,926.52 2,938.85 5,952,765.12 656,534.46 70°16'39.828 N 148°44'0.755 W 10,555.41 11.28 326.34 8,154.21 4,942.40 2,928.25 5,952,780.78 656,523.53 70°16'39.984 N 148°44'1.063 W 10,650.02 12.61 326.90 8,246.77 4,958.75 2,917.48 5,952,796.91 656,512.43 70°16'40.145 N 148°44'1.377 W 10,744.14 12.29 327.12 8,338.68 4,975.77 2,906.43 5,952,813.70 656,501.04 70°16'40.313 N 148°44'1.698 W 10,838.91 11.43 327.40 8,431.42 4,992.15 2,895.89 5,952,829.86 656,490.17 70°16'40.474 N 148°44'2.005 W 10,888.00 11.30 327.62 8,479.55 5,000.31 2,890.70 5,952,837.91 656,484.81 70°16'40.554 N 148°44'2.156 W 10,944.95 10.80 326.65 8,535.45 5,009.48 2,884.78 5,952,846.96 656,478.71 70°16'40.644 N 148°44'2.329 W 10,990.86 11.16 327.16 8,580.52 5,016.81 2,880.00 5,952,854.19 656,473.78 70°16'40.716 N 148°44'2.468 W 11,085.81 10.53 328.25 8,673.77 5,031.91 2,870.45 5,952,869.08 656,463.93 70°16'40.865 N 148°44'2.745 W I 11,180.09 12.07 331.90 8,766.22 5,047.93 2,861.28 5,952,884.92 656,454.43 70°16'41.023 N 148°44'3.013 W 11,274.01 12.72 327.02 8,857.95 5,065.27 2,851.02 5,952,902.04 656,443.82 70°16'41.193 N 148°44'3.311 W 11,368.96 13.25 327.55 8,950.47 5,083.22 2,839.49 5,952,919.75 656,431.93 70°16'41.370 N 148°44'3.647 W 11,464.12 13.14 329.14 9,043.12 5,101.71 2,828.09 5,952,938.00 656,420.16 70°16'41.552 N 148°44'3.978 W 11,558.94 12.86 329.97 9,135.51 5,120.09 2,817.28 5,952,956.16 656,408.97 70°16'41.732 N 148°44'4.293 W 11,610.00 12.86 329.97 9,185.29 5,129.93 2,811.60 5,952,965.88 656,403.09 70°16'41.829 N 148°44'4.458 W, 8/4/2011 3:59:26PM Page 6 COMPASS 2003.16 Build 73 • • Survey Report-Geographic Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: A-25B @ 90.32ft(Doyon 25) Site: PB A Pad MD Reference: A-25B @ 90.32ft(Doyon 25) Well: A-25 North Reference: True Wellbore: A-25B Survey Calculation Method: Minimum Curvature Design: A-25B Database: EDM.16-ANC Prod-WH24P Targets Target Name -hit/miss target Dip Angle Dip Dir. TVD +N/-S +E/-W Northing Easting -Shape (0) (0) (ft) (ft) (ft) (ft) (ft) Latitude Longitude A-25B Tgt1 rev2 0.00 0.00 8,560.32 5,012.60 2,881.13 5,952,850.00 656,475.00 70°16'40.675 N 148°44'2.435 W -actual wellpath misses target center by 1.35ft at 10970.24ft MD(8560.28 TVD,5013.49 N,2882.16 E) -Circle(radius 150.00) Casing Points Measured Vertical Casing Hole Depth Depth Diameter Diameter ft ) Name (in) (in) ( ) (ft 3,154.62 2,773.40 13 3/8" 13.375 17.500 10,984.00 8,573.78 7" 7.000 8.500 Formations Measured Vertical Dip Depth Depth Dip Direction (ft) (ft) Name Lithology (°) (') 8,729.98 6,443.84 CM2 9,435.98 7,061.30 CM1 9,783.98 7,400.24 HRZ 10,006.98 7,617.95 LCU 10,099.98 7,708.69 JF 10,182.98 7,789.70 JE 10,983.98 8,573.76 TSGR 11,524.98 9,102.41 OOWC Checked By: Approved By: Date: 8/4/2011 3:59:26PM Page 7 COMPASS 2003.16 Build 73 TREE= 4-1/16"CM/ • Y NOTES: WARNING:RADIO TRANSMITTER IN WELLHEAD= McEVOY THER MONITORING SHACK MUST BE TURNED ACTUATOR= BAKERC -2 5 B OFF BEFORE ANY WELL WORK INVOLVING KB. ELEV= 87.68' EXPLOSIVES CAN BEGIN.CONTACT PAD OPER. BF. ELEV = 51.98' I KOP= 1100' Max Angle= 54°@ 4553' Datum MD= 11307' ' I I 2190' IH4-1/2"HES X NIP, ID=3.813" I Datum TV D= 8800'SS 2987 H 9-5/8"DV COLLAR I 20"CONDUCTOR, ID=? I 110' GAS LIFT MANDRELS ST MD I TVD DEV TYPE VLV LATCH PORT DATE 13-3/8"CSG,72#,L-80, ID=12.347" —I 3152' I 5 4249 3488 48 MMG DOME RK 16 10/03/11 4 6606 4993 47 MMG SO RK 20 10/03/11 3 7757 5795 50 MMG DMY RK 0 08/06/11 9-5/8"X 7"BKR ZXPN LTP w/10'TIEBACK, —I 8052' 2 8663 6393 42 KBG2 DMY BK 0 08/06/11 1 9362 6991 19 KBG2 DMY BK 0 08/06/11 &FLEX LOCK LNR HGR, ID=6.18" 9-5/8"WHIPSTOCK(07/22/11) -I 8179' 9-5/8"CSG,47#,L-80 BTC, ID=8.681" H -8179 I MILLOUT WINDOW(A-25B) 8179' 8196' 9-5/8"EZSV (TAGGED 07/22/11) H 8200' I VI 1.1. t II"RA Minimum ID =3.725" @ 10821' 4-1/2" HES XN NIPPLE ' I 10682' H4-1/2"HES X NIP, ID=3.813" I Z X 10710' H7"X 4-1/2"HES TNT PKR, ID=3.856" I 10745' H4-1/2"HES X NIP, ID=3.813" I 1 10821' ELMD I-14-1/2"HES XN NIP, ID=3.725"(10/07/11) I 1 10826' H7"X 5"BKR HRD-E ZXPN LTP, ID=4.21" I I TOP OF 4-1/2"PROD LNR I—I 10826' 10834' IH4-1/2"WLEG, ID=3.958" I 4-1/2"TBG, 12.6#,13CR-85 VAM TOP, —I 10834' --I ELMD TT NOT LOGGED I .0152 bpf, ID=3.958" 10842' H7"X 5"BKR FLEX LOCK HGR, ID=4.19" I 7"LNR,26#, L-80 VAM TOP HC XO TO BTC H 10861' I "' 10852' I--I5"X 4-1/2"X0, ID=3.90" I 7"LNR,26#, L-80 BTC, ID=6.276" IH 10983' I A k PERFORATION SUMMARY REF LOG:SLB PBMS-A/CCL/CR ON 10/07/11 ANGLE AT TOP PERF: 13°@ 11280' Note:Refer to Production DB for historical perf data SIZE SPF INTERVAL Opn/Sqz DATE 3-3/8" 6 11280- 11285 0 10/08/11 PBTD -I 11520' 4-1/2"LNR, 12.6#, 13CR-85 VAM TOP, --I 11608' •�•�•� .0152 bpf, ID=3.958" ��••- DATE REV BY COMMENTS DATE REV BY COMMENTS 1 PRUDHOE BAY UNIT 08/23/82 NI ES ORIGINAL COM PLETION 10/10/11 TTR/PJC XN NIP ELMD LOGGED(10/7/11 WELL: A-25B 07/16/89 NI ES RWO 10/10/11 SRD/PJC PERFORATE(10/8/11) PERMIT No: 2110030 11/22/01 D16 SUSPENDED ST(A-25A) 10/10/11 MP/PJC FINAL DRLG CORRECTIONS API No: 50-029-20764-02 08/09/11 D25 SIDETRACK(A-25B) SEC 35,T11 N,R12E,2628'FSL&1703'FEL 08/13/11 PJC DRLG DRAFT CORRECTIONS 10/10/11 MBM/PJC GLV C/O(10/03/11) 1 BP Exploration(Alaska) -2.m-003 24-OCT-2011 WI flattener No.5802 Alaska Data&Consulting Services Company: State of Alaska 2625 Gambell Street,Suite 400 Alaska Oil&Gas Cons Comm Anchorage,AK 99503-2838 Attn: Christine Shartzer ATTN:Stephanie Pacillo 333 West 7th Ave,Suite 100 Anchorage,AK 99501 Well Job# Log Description Date BL Color CD Z-21A BG4H-00097 PPROF W/DEFT&GHOST 9-Oct-11 1 1 13-15 BINC-00066 PRIMARY DEPTH CONTROL LOG 21-Sep-11 1 1 13-25 BJGT-00070 PRIMARY DEPTH CONTROL LOG 26-Sep-11 1 1 R-12A AWJI-00158 USIT 16-Aug-11 1 1 2-65 BX69-00003 ISOLATION SCANNER 5-Oct-11 1 1 • ---7 A-25B AV1 P-00098 USIT 6-Aug-11 1 1 18-12C AWJI-00162 MDT 13-Sep-11 1 1 S-09 BVYC-00011 USIT 11-Oct-11 1 1 R-12A BBSK-00098 PRIMARY DEPTH CONTROL LOG 28-Sep-11 1 1 Y-36 BVYC-00007 PPROF 2-Oct-11 1 1 06-21 B BD88-00173 MEMORY DEPTH DETERMINATION 28-Sep-11 1 1 06-21B BD88-00173 PPROF W/DEFT&GHOST 29-Sep-11 1 1 W-10A BCRC-00132 PPROF 11-Sep-11 1 1 N-04A BVYC-00009 CROSSFLOW CHECK 5-Oct-11 1 1 A-25B BG4H-00096 SCMT 7-Oct-11 1 1 17-04B BR12-00019 LEAK DETECT LOG 3-Oct-11 1 1 W-16A BCRC-00133 PPROF 12-Sep-11 1 1 Z-21A BR12-00020 MEMORY STP SURVEY 5-Oct-11 1 1 Z-29 BD88-00168 PPROF W/DEFT&GHOST 22-Sep-11 1 1 3-45/M-39 BD88-00175 IPROF 3-Oct-11 1 1 R-12A BBSK-00098 SCMT 29-Sep-11 1 1 R-12A BVYC-00005 ISOLATION SCANNER 12-Sep-11 1 1 14-30A BG4H-00093 PRIMARY DEPTH CONTROL LOG 3-Oct-11 1 1 N-04A BINC-00069 PPROF 14-Oct-11 1 1 • PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COPY EACH TO: BP Exploration(Alaska)Inc. Alaska Data&Consulting Services Petrotechnical Data Center LR2-1 2525 Gambell Street,Suite 400 900 E.Benson Blvd. Anchorage,AK 99503-2838 24-OCT-2011 Schlwnberger No.5802 Alaska Data&Consulting Services Company: State of Alaska 2525 Gambell Street,Suite 400 Alaska Oil&Gas Cons Comm Anchorage,AK 99503-2838 Attn: Christine Shartzer ATTN:Stephanie Pacillo 333 West 7th Ave,Suite 100 Anchorage,AK 99501 Well Job# Log Description Date BL Color CD 2-21A BG4H-00097 PPROF W/DEFT&GHOST 9-Oct-11 1 1 13-15 BINC-00066 PRIMARY DEPTH CONTROL LOG 21-Sep-11 1 1 13-25 BJGT-00070 PRIMARY DEPTH CONTROL LOG 26-Sep-11 1 1 R-12A AWJI-00158 USIT 16-Aug-11 1 1 Z 45 BX69-00003 ISOLATION SCANNER 5-Oct-11 1 1 _.-----)1P A-25B AV1 P-00098 USIT 6-Aug-11 1 1 III 18-12C AWJI-00162 MDT 13-Sep-11 1 1 S-09 BVYC-00011 USIT 11-Oct-11 1 1 R-12A BBSK-00098 PRIMARY DEPTH CONTROL LOG 28-Sep-11 1 1 Y-36 BVYC-00007 PPROF 2-Oct-11 1 1 06-21B BD88-00173 MEMORY DEPTH DETERMINATION 28-Sep-11 1 1 06-21B BD88-00173 PPROF W/DEFT&GHOST 29-Sep-11 1 1 W-10A BCRC-00132 PPROF 11-Sep-11 1 1 N-04A BVYC-00009 CROSSFLOW CHECK 5-Oct-11 1 1 A-25B BG4H-00096 SCMT 7-Oct-11 1 1 17-04B BR12-00019 LEAK DETECT LOG 3-Oct-11 1 1 W-16A BCRC-00133 PPROF 12-Sep-11 1 1 Z-21A BR12-00020 MEMORY STP SURVEY 5-Oct-11 1 1 Z-29 BD88-00168 PPROF W/DEFT&GHOST 22-Sep-11 1 1 3-45/M-39 BD88-00175 IPROF 3-Oct-11 1 1 R-12A BBSK-00098 SCMT 29-Sep-11 1 1 R-12A BVYC-00005 ISOLATION SCANNER 12-Sep-11 1 1 14-30A BG4H-00093 PRIMARY DEPTH CONTROL LOG 3-Oct-11 1 1 N-04A BINC-00069 PPROF 14-Oct-11 1 1 PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COPY EACH TO: BP Exploration(Alaska)Inc. Alaska Data&Consulting Services Petrotechnical Data Center LR2-1 2525 Gambell Street,Suite 400 900 E.Benson Blvd. Anchorage,AK 99503-2838 • • McMains, Stephen E (DOA) From: Hubble, Terrie L [Terrie.Hubble @bp.com] Sent: Monday, November 28, 2011 2:18 PM To: McMains, Stephen E (DOA) Subject: PBU A-25B, PTD#211-003 H i Steve, TD ) ct 603 Please reference the following well: Well Name: PBU A-25B Permit #: 211-003 API #: 50-029-20764-02-00 Date of Test: 11/25/11 Type of Test: IPT (Initial Production Test) Choke Size: 91 Choke Unit: Degrees Production Method: Gas Lifted Duration (Hours Tested): 4 Top Reference (Top Perf MD): 11280' Bottom Reference (Bottom Perf MD): 11285' Tubing Flowing (Pressure): 220 Casing Pressure: 1,220 Total Test (Rate f/ 0, W, G): 250 5 389 24-Hour Rate (0, W, G): 1,502 277 2,336 Gravity (Oil, API): Not Available GOR (Gas-Oil Ratio): 1,555 This well began Production on November 25, 2011 Method of Operations on this date: Gas Lifted 1 s. • Page 1 of 1 Regg, James B (DOA) From: Rall, John R [RalIJR2 @BP.com] Sent: Sunday, July 31, 2011 2:43 PM Zit 1-Q83 To: DOA AOGCC Prudhoe Bay Cc: Kilfoyle, Jeffery A; Rossberg, R Steven; Daniel, Ryan; Cismoski, Doug A; Mountford, Carl F; AK, D&C Rig 25 Well Site Leader; Hyatt, Trevor Subject: Prudhoe Bay Well A-25B BOPE Usage Report Attachments: A-25B BOPE Use Reporting.doc.docm 8/1/2011 • Blow Out Preventer Equipment ( BOPE ) Usage Report to the AOGCC The purpose of this document is to ensure timely reporting to the AOGCC of any, BOPE use to prevent the flow of fluids from a well. Field Superintendent Name: John Rall Wellsite Leader Name: Dave Newlon/ Rick Dolfi Contact Number: 659-4618 Contact Number: 659-5856 Traction Number: Well Location/Name & Rig Name: Prudhoe Bay A pad, A-25B Doyon Rig 25 - Permit To Drill (PTD) Number: 211003 Date and Time of Incident: 7/30/2011 23:53 hours Original Scope of Work: Sidetrack and redrill Operational Description Leading up to Well Control Event: RIH w/ 7" liner. CBU prior to cementing. BOPE Used and Reason: Observed flow increase. Had 4 bbl pit gain. Well Shutin. SIDPP=O SICP=O After annular preventer was closed, the well was circulated thru the choke and mud gas separator. No increase in mud weight was required, kill weight mud was in the hole. After the gas cut mud was circulated out, the well was checked and no flow was detected. Another bottoms up was circulated prior to resuming cementing operations. Is a BOPE Test Required after use ( Yes/ No): Yes If no, why? 24 hour notice required to NS AOGCC Inspectors prior to testing BOPE components. Plan Forward: POH after cement job and test BOP's Additional Comments: It appears that gas/air expansion near surface was the reason why the well Y appeared to flow. Email to AOGCC North Slope Inspectors within 24 hours of the incident: doa.ao•cc.•rudhoe.ba • alaska.•ov Email CC List BP WSL Harry Engel Wells Team Leader Jeff Kilfoyle Engineering Team Leader Operations Drilling Engineer-Well File Wells Operations Manager Drilling & Completions Engineer Manager Wells Intervention Manager BOPE Usage Report for AOGCC Rev 1 September 1, 2010 HRE 1 • WELL DATA TRANSMITTAL tLlg29 To: State of Alaska September 9, 2011 Alaska Oil and Gas Conservation Commission Attn.: Howard Okland 333 West 7th Avenue,Suite 100 Anchorage,Alaska 99501-3539 (2..\\- 003 RE: LWD Formation Evaluation Data: A-25B AK-MW-0007760438 A-25B 50-029-20764-02 2"x 5" MD Triple Combo Logs: 1 Color Log 2"x 5"TVD Triple Combo Logs: 1 Color Log 2"x 5" MD Quad Combo Logs: 1 Color Log 2"x 5"TVD Quad Combo Logs: 1 Color Log 1"x 5" MD BAT Cement Log 1 Color Log Digital Log Images&LWDG-formatted LIS Data w/verification listing; 1 CD Rom PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COPY OF THIS TRANSMITTAL LETTER TO THE BP PETROTECHNICAL DATA CENTER AND ONE COPY TO SPERRY DRILLING: Sperry Drilling BP Exploration (Alaska), Inc. Attn: Buster Bryant Petrotechnical Data Center 6900 Arctic Blvd. LR2-1 Anchorage,Alaska 99518 P. 0. Box 196612 Office: 907-273-3539 Anchorage,AK 99516-6612 Fax: 907-273-3535 Buster.Bryant @halliburton.com 1 8agt Date• t1 I3 O� � Si ned: Signed: S TIE OF SEAN PARNELL,GOVERNOR ALASKA OIL AND GAS 333 W.7th AVENUE,SUITE 100 CONSERVATION COMMISSION ANCHORAGE,ALASKA 99501-3539 PHONE (907)279-1433 FAX (907)276-7542 John Egbejimba Engineering Team Leader BP Exploration (Alaska), Inc. 6 Cj, P.O. Box 196612 Anchorage, AK 99519-6612 Oil Re: Prudhoe Bay Field, Prudhoe Bay O Pool, PBU A-25B BP Exploration (Alaska), Inc. Permit No: 211-003 Surface Location: 2652' FNL, 1703' FEL, SEC. 35, T11N, R13E, UM Bottomhole Location: 2816' FNL, 4151' FEL, SEC. 25, T11N, R13E, UM Dear Mr. Egbejimba : Enclosed is the approved application for permit to re-drill 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. Sincerely, /. Daniel T. Seamount, Jr. Chair DATED this Zday of January, 2011. cc: Department of Fish 85 Game, Habitat Section w/o encl. (via e-mail) Department of Environmental Conservation w/o encl. (via e-mail) STATE OF ALASKA .'7:/d.clef115 ALAS ' IL AND GAS CONSERVATION COMMI N JAN 0 6 2011 AA// PERMIT TO DRILL 20 AAC 25.005 I€ae,` a mi,2 . . ....c+.^i ti_sion la.Type of work: lb.Proposed Well Class: _ Development Oil ❑Service-Winj ❑Single Zone lc. Specify if"�,Ill riss pproposed for: ❑ Drill ®Redrill ❑ StratigraphicTest ❑Development Gas ❑Service-Supply ❑Multiple Zone ❑Coalbed GAITP hydrates ❑ Re-Entry ❑ Exploratory ❑Service-WAG ❑Service-Disp ❑Shale Gas 2. Operator Name: 5.Bond: 0 Blanket ❑Single Well 11. Well Name and Number: BP Exploration(Alaska) Inc. Bond No. 6194193 PBU A-25B 3. Address: 6. Proposed Depth: 12.Field/Pool(s): P.O. Box 196612,Anchorage,Alaska 99519-6612 MD 11,600' ND 9171' Prudhoe Bay Field/Prudhoe 4a. Location of Well(Governmental Section): 7. Property Designation(Lease Number): Bay Oil Pool Surface: ADL 028286 2652'FNL, 1703'FEL,Sec.35,T11N, R13E, UM Top of Productive Horizon: 8. Land Use Permit: 13. Approximate Spud Date: 2919'FNL,4097' FEL, Sec.25,T11N, R13E, UM May 11,2011 Total Depth: 9.Acres in Property: 14.Distance to Nearest Property: 2816' FNL,4151 FEL,Sec.25,T11N, R13E, UM 2560 18460' 4b. Location of Well(State Base Plane Coordinates-NAD 27): 10.KB Elevation above MSL: 91.43 feet 15.Distance to Nearest Well Open Surface: x- 653697 y-5947780 Zone- ASP4 GL Elevation above MSL: 51.93 feet to Same Pool: 1260' 16.Deviated Wells: Kickoff Depth: 8200 feet 17.Maximum Anticipated Pressures in psig(see 20 AAC 25.035) Maximum Hole Angle: 51 degrees Downhole: 3280 ' Surface: 2400 ' 18. Casing Program: Specifications Top;Setting Depth-Bottom Quantity of Cement,C.f.or sacks Hole Casing Weight Grade Coupling Length MD TVD MD ND (including stage data) 8-1/2" 7" 26# L-80 Premium, 2767' 8210' 6081' 10977' 8561' 197 cu.ft Class'G' 6-1/8" 4-1/2" 12.6# 13Cr VamTop 773' 10827' 8413' 11600' 9171' 130 cu ft Class'G' 19. PRESENT WELL CONDITION SUMMARY(To be completed for Redrill and Re-entry Operations) Total Depth MD(ft): Total Depth ND(ft): Plugs(measured): Effective Depth MD(ft): Effective Depth ND(ft): Junk(measured): 13092' 9138' None 11883' 8424' None Casing Length r Size Cement Volume MD TVD Conductor/Structural 110' 20"x 30" 8 cu vds cement 110' 110' Surface 3152' 13-3/8" 4365 cu ft Permafrost 3152' 2768' Intermediate 11958' 9-5/8" 1610 cu ft Class'G' 11958' 8481' Production Liner 623' 7" 420 cu ft Class'G' 11486'- 12109' 8131'-8599' Perforation Depth MD(ft): None Perforation Depth ND(ft): None 20.Attachments: ❑ Property Plat ®BOP Sketch 0 Drilling Program ❑Time vs Depth Plot ❑Shallow Hazard Analysis ,. 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 Jesse Rosenbaum,564-5155 Printed Name John Egbejimba Title Engineering Team Leader Prepared By Name/Number: Signature Phone 564-5859 Date 1 �j (I Elizabeth Barker,564-4628 1111////�� Commission Use Only Permit To Drill API Number: Permit Ap v I Date: See cover letter for Number: �fJ�3 50-029-20764-02-00 { l l p ` k other requirements Conditions of Approval: If box is checked,well pmay not be used to explore for,test,or produce coalbed met ane,gas hydrates,or gas contained shales: Other: 7 3800 loses 601 es't 1 Samples Req'd: Dyes b0 No Mud Log Req'd: ❑Yes No zSdD PSG #14-ew_ay - csT 642S Measures: IYes ❑No Directional Survey Req'd: DirYes ❑No / 0 APPROVED BY THE COMMISSION Date ,COMMISSIONER Form 10-401 evi/Revised 0 /2009 This permit is valid for 24 months from the date of approval(20 AAC 25.005(g)) Submit In Duplicate ORIGINAL 7Z ///.// , W, • • Øbp GPJ > Y January 4, 2011 Dan Seamount AOGCC, Chairperson Alaska Oil & Gas Conservation Commission 333 W. 7th Avenue, Suite 100 Anchorage, AK 99501 Re: GBP Well A-25B Permit to Drill Dear Mr. Seamount Well A-25B is currently scheduled to be drilled by Doyon-25 on February 1st, 2011. The maximum anticipated surface pressure from the Ivishak with a full column of gas from TD to surface is 2,400 psi. We will be utilizing Doyon's 5000 psi four preventer stack (3 rams and an annular). The BOP's will be tested to 3500 psi. For the planned drilling of this well, an 8-1/2" intermediate hole will be drilled from a KOP in the 9-5/8" casing at -8200' MD to the top of the Sag River formation -10,977' MD where a 7", 26.0# intermediate casing string will run and cemented 1000' above the shoe. A 6-1/4" 11° slanted production hole will then be drilled through the Ivishak into the Kavik at final well TD of-11,600' MD where a 4-'/2", 12.6#, 13-Cr liner will be run to TD and cemented. The planned completion for this well will include a 4-W, 12.6#, 13-Cr tubing string with gas lift mandrels and a permanent production packer. All wells passed the major risk classification with the exception of one offset well, A-04 at 10,300'. A-04 will be resurveyed to provide a better tool code to insure passing criteria for the final AC scan. If A-04 has not been resurveyed prior to initiating operations a TCR will be completed and the well will be minor risked for AC scan purposes. Please find attached the A-25B Well Plan Summary, directional plan and proposed completion diagram. If you have any questions or require any additional information, please contact me at 564-5155 Sincerely, Jesse Rosenbaum Drilling Engineer BPXA A-25B Sidetrack Page 1 Øbp Well Name: A-25B Drill and Complete Plan Summary Type of Well (service / producer/ injector): Ivishak Producer Surface Location: X = 653,697.00 /Y = 5,947,780.00 As-Staked 2652' FNL, 3576' FWL , T11 N, R13E, Sec. 35 Target Location 1: X = 656,475 /Y = 5,952,850 Z = -8,470' TVDss 2919' FNL, 1182' FWL, T11 N, R13E, Sec. 25 Bottom Hole Location: X = 656,419.4 /Y = 5,952,951.6 Z = -9,080' TVDss 2816' FNL, 1129' FWL, T11 N, R13E, Sec. 25 AFE I X3-00Y3D-C: Rig: I Doyon-25 Estimated Start Date: 1 2/1/2011 Operating days to complete: 1 15.1 MD: 1 11,600' TVD: 9,171' RT/GL: 1 39.5'/51.93' RTE: 1 91.43' Well Design: I Rotary Sidetrack Objective: I Ivishak Zone 4 Directional: Ver. Sperry (WP08) KOP: 8,200' MD Maximum Hole Angle: 51° intermediate section / 12° Production section Close Approach Wells: All wells passed the major risk classification with the exception of A-04 at 10,302' MD. A-04 will resurveyed to provide a better tool code allowing it to pass the AC scan. If A-04 has not been resurveyed prior to initiating operations a TCR will be completed and the well will be minor risked for AC scan purposes. Nearest well within Pool 1,260' (S/SE) -A-04 Distance to Nearest Property 18,460' South Line: A-25B Sidetrack Page 1 Current Well Information • Well Name: A-25A API Number: 50-029-20764-01 PTD: 2011480 Well Type: Suspended Producer Current Status: Well has been suspended since November 2001 BHP: 3,280 psi @ 8800'TVDss (7.2 ppg) BHT: 215° F @ 8800' TVDss Mechanical Condition: Tubing: 4-1/2" 12.6#, L-80 Kill String to 3,311' MD. (planned tubing Pull) TD/ PBTD: P&A'd to 11,883' MD in 11/2001 ' Max Dogleg (to TOC): 6.8°/100' @ 2,492' MD&2,542' MD Max Angle(to TOC): 58° @ 10,042' MD Wellhead Equipment: McEvoy SSH 13-3/8 butt Starting Head: McEvoy Lower SSH 13-5/8" 5000 psi flange top w/(2) SSO Tbg. Spool: McEvoy SSH 13-5/8"x 13-5/8" 5000 psi w/(2) SSO Tbg. Hanger: McEvoy SSH 13"X 4-1/2" NSCT Top x Bottom w/4"type H BPV profile Csg. Hanger: 9 5/8" Mandrel Tbg. Head Adapter: McEvoy MS/CCL, 13-5/8" 5000 psi x 4-1/8" 5000 psi Tree: 4-1/8"5000 psi Carbon Tree BPV Profile: McEvoy Type H BPV Completion Equipment: SSSV: None Control line: None Gas Lift Mandrels: None Control line bands/clamps: None Chemical Inj. Lines: None Chemical Inj. Mandrels: None Kill String: 4-1/2" 12.6#, L-80, at 3,311' MD Casing Equipment: Surface Casing: 13 3/8" 72#, L-80—3,152' MD 13 3/8" Cement: 4,624 sx 14.9 PPG Permafrost C Intermediate Casing: 9-5/8", 47#, L-80—11,957' MD 9-5/8" Cement- Primary 1,400 sx 15.8 PPG Class G-Top of cement estimated at 6,817'. 9-5/8" Cement—Bullhead 29 BBLS Permafrost Tubing Fluids: 8.6 ppg w/2000' diesel cap(As Planned -MUST CONFIRM) IA Fluids 8.6 ppg w/2000' diesel cap(As Planned -MUST CONFIRM) OA Freeze Protection +/-4268' of Arctic Pack(248 BBLS)—Density Not Reported Perforations: P&A'ed w/cement tested to 3000 psi. Pre-Rig MITI PPPOT Data: MIT-OA Passed 2000 psi 10/19/2010 CMIT-IA(no packer) Passed 3000 psi 10/10/2010 MIT-T(kill string) N/A PPPOT-T Passed 5000 psi 10/14/2010 PPPOT-IC Passed 3500 psi 10/14/2010 A-25B Sidetrack Page 2 • ! MIT—OA to 2000 psi Passed 10/19/2010 CMIT-TxIA(no packer)to 3,000psi Passed 10/10/2010 MIT-T(kill string) N/A PPPOT-T to 5,000psi Passed 10/14/2010 PPPOT-IC to 3,500psi Passed 10/14/2010 NEW Wellhead/Tree Requirements Well Number Customer Rig A-25 BPXA Current Configuration McEvoy Lower SSH with 4-1/2Current Configuration NSCT Hanger Item Description MPN Customer ID Casing Head McEvoy Lower SSH. 13-3/8" butt x 13-5/8 5K Casing Hanger McEvoy 9-5/8 mandrel Mandrel Pack-Off YBT for 9-5/8 mandrel 270405-00-00-05 67891 Tubing Spool McEvoy SSH 13-5/8 x 13-5/8 67883 5K with(2)SSQ Tubing Hanger 13 x 4.5 NSCT top and bottom 2024164-03 95991 with 4"type H BPV profile Tubing Head Adapter 13-5/8 x 4-1/8 5K 2024164-02 67901 Tree 4-1/8 5K Carbon Tree 69517 New Configuration Item Description MPN Customer ID Casing Head McEvoy Lower SSH. 1 3-3/8 butt x 13-5/8 5K Casing Hanger McEvoy 9-5/8 Mandrel • Mandrel Pack-Off YBT for 9-5/8 mandrel 270405-00-00-05 67891-X • Tubing Spool McEvoy SSH 13-5/8 x 13-5/8 67883 5K with(2)SSQ Tubing Hanger 12 x 4.5 TCII top x bottom with 2221338-02-01 282293-X 4"type H BPV profile Tubing Head Adapter 13-5/8 x 4-1/8 5K 2024164-03 67901-X Tree 4-1/8 5K Carbon Tree 2012448-06 69517-X A-25B Sidetrack Page 3 Well Evaluation Requirem• ents 1 Interval MWD/L WD 0� CH logs Sampling Intermediate GR/Res/PWD N/A CBL* Yes,as directed by rig site geologist Production GR/Res/Den/Neutron N/A CBL(Post Rig) Yes,as directed by rig site geologist PDCL is the Schlum.GR-CCL Log dated 11-06-10. Log and record GR 200'or more above Notes KOP. Make sure to log 50'above clearly well defined correlation point. *Not needed if LWD Sonic will suffice with the State for CBL. Mud Program Intermediate Mud Properties: LSND 1 8-1/2" hole section to TSAG @ 10,970' MD Depth Interval Density(ppg) PV YP API FL HTHP FL MBT PH KOP(8,200' MD)- 9.1 10-18 18-28 <6 N/C <15 9- 10 THRZ(9,796 MD) THRZ(9,796' MD) 10.1 12-22 18-28 4-6 <10.0 <20 9- 10 -TD (10,977' MD) Production Mud Properties: Reservoir Drill-in Fluid I 6-1/8" hole section to 11,600' Depth Interval Density(ppg) PV YP LSVR API Fl pH MBT , 10,977'- 11,600' 8.4-8.6 6-12 22-28 >20,000 6.0-8.0 9.0-9.5 < 3 Casing/Tubing Program: Size Tbg O D. Wt/Ft Grade Connection Length MD/TVD MD/TVD 8 %" 7" 26 L-80 Premium 2,767' 8,210'/6,081' 10,977'/8,561' 6 1/8" 4 %" 12.6 _ 13-Cr Vam Top 623' 10,827'/8,413' 11,600'/9,171' Tubing 4 '/2" 12.6 13-Cr VamTop 10,827' GL 10,827'/8,413' Cement Calculations: Intermediate/Production Casing: Casing Size 17" Intermediate Basis: Lead: None Tail: Slurry: Based on 1,000' of 8.5" open hole x 7"csg +40%excess+ 82' shoe joint. Slurry TOC: At-9,977' Total Cement Volume: Lead None Tail 35 bbl/ 195 cuft/ 168.2 sks of'G'at 15.8 ppg and 1.16 cuft/sk Casing Size I 4.5" 12.6#, 13-Cr Production Liner Basis: Lead: None Slurry: Based on 2,842' of 6.125" open hole x 4 '/ liner+40% excess+ 150' of 7"csg x 4 1/2"csg liner lap+200' of 7"csg x 4"drill pipe above TOL+ 82' shoe joint. ', Slurry TOC: At-10,627' MD Total Cement Volume: Lead None Tail 23.2 Bbls, 130 cu ft, 112 sacks Class G @ 15.8 ppg, — 1.16 cuft/sack Temp BHST=212° F @ 8,800' A-25B Sidetrack Page 4 r 0 Formation Tops: Formation Estimated Formation Top Hydrocarbon Formation Thickness ffg Bearing all TVD (TVDSS) RKB MD RKB (Yes/No) Vertical Measured UG1 -4,913 5,004 No 535 WS2 -5,448 5,539 No 253 WS1 -5,701 5,792 No 233 CM3 -5,934 6,025 No 430 KOP @ 8210'MD in CM3 -5,984 6,075 CM2 -6,364 6,455 8,750 No 619 704 CM1 -6,983 7,074 9,454 No 331 342 THRZ -7,314 7,405 9,796 No 213 218 LCU -7,527 7,618 10,014 No 87 89 TJF -7,614 7,705 10,102 No 88 90 TJE -7,702 7,793 10,192 No 359 367 TJD -8,061 8,152 10,559 No 108 110 TJC -8,169 8,260 10,670 No 140 144 TJB -8,309 8,400 10,814 No 162 164 TSGR -8,471 8,562 10,977 Yes 27 30 TSHU -8,498 8,589 11,007 Yes 80 83 TSAD -8,578 8,669 11,090 Yes 41 41 45SB -8,619 8,710 11,131 Yes 91 92 42SB -8,710 8,801 11,222 Yes 67 69 TCGL -8,777 8,868 11,292 Yes 79 82 BCGL -8,856 8,947 11,374 Yes 68 69 23SB -8,924 9,015 11,443 Yes 30 29 HO/T -8,954 9,045 11,472 Yes 30 33 22TS -8,984 9,075 11,505 Yes 28 27 OOWC -9,012 9,103 11,531 No 18 20 21TS -9,030.00 9,121.48 11,551.54 No Well Control Well control equipment consisting of 5,000 psi working pressure pipe rams (2), blind/shear rams, and annular preventer will be installed and are capable of handling the maximum potential surface pressures. • Based upon calculations below, BOP equipment will be tested to 3,500 psi. BOP regular test frequency for A-25B will be 14 days during drilling phase and 7 days during . decompletion. - Intermediate Interval Maximum anticipated BHP 3,280 psi @ 8,800'TVDss (7.2 ppg EMW) Maximum surface pressure 2,400 psi (.10 psi/ft gas gradient to surface) A-25B Sidetrack Page 5 • Rams test to 3,500 psi/250 psi. • Planned BOP test pressure 0 p Annular test to 2,500 psi/250 psi 9 5/8" Casing 3,500 psi surface pressure Integrity Test—8 1/2" hole Perform a LOT after drilling 20' of new hole Kick Tolerance A LOT of 10.5 ppg will provide a 179 Bbl influx tolerance with 10.1 ppg mud weight in the hole and a 7.65 ppg EMW pore pressure. Production Interval Maximum anticipated BHP 3,280 psi @ 8,800' TVDss (7.2 ppg EMW) , Maximum surface pressure 2,400 psi (.10 psi/ft gas gradient to surface) Planned BOP test pressure Rams test to 3,500 psi/250 psi. Annular test to 2,500 psi/250 psi 7" Casing 14'/2" Liner Test 3,500 psi surface pressure Integrity Test—6-1/8" hole FIT after drilling 20' of new hole. Kick Tolerance A FIT of 10.0 ppg will provide an "infinite" influx volume with an 8.5 ppg mud weight in the hole and a 7.65 ppg EMW pore presssure. Planned completion fluids 8.5 ppg Seawater/6.8 ppg Diesel Disposal: • No annular injection in this well. • Cuttings Handling: Cuttings generated from drilling operations will be hauled to grind and inject at DS-04. Any metal cuttings will be sent to the North Slope Borough. • Fluid Handling: Haul all drilling and completion fluids and other Class II wastes to DS-04 for injection. Haul Class I waste to DS-04 and/or Pad 3 for disposal/Contact the GPB Environmental Advisors(659-5893)f/guidance. Fault Prognosis: There is no fault crossing for the planned well. If a fault is intersected, rig and personnel will follow lost circulation decision tree. A-25B Sidetrack Page 6 DRILL AND COMPL!TE PROCEDURE SUMMARY() Pre-Rig Operations: 1. W Pressure Test(to verify Abandonment& Barriers) MIT-OA to 2000 psi CMIT-TxIA to 3,000psi PPPOT-T to 5,000psi PPPOT-IC to 3,500psi Function test tubing and casing LDS. Back out to ensure full movement. 9 5/8" packoff will be changed out 2. W Pressure Test Tubing to 3500 psi 3. F Circulate the well to seawater. Freeze-protect the IA and tubing with diesel to -2,200'. 4. D Bleed all pressures to zero. Set BPV. Secure well. 5. V Set BPV. Secure well. 6. 0 Remove the well house. If necessary, level the pad. Install impermeable cellar liner Rig Operations-Sundry Notice: RE-ENTRY Event/ PRE Phase- 1. MI / RU rig 2. MIT-OA 2000 psi for 30 minutes(begin monitoring OA). RE-ENTRY Event/DECOMP Phase- 3. Pull BPV. Circulate out diesel freeze protection and displace the well to seawater. 4. Set TWC and test to 1,000 psi from below and above. 5. Nipple down tree&tubing adapter. 6. Nipple up and test BOPE to 3,500psi high/250psi low. Pull TWC. 7. R/U &pull 4-1/2"tubing (kill string)from 3311'. RE-ENTRY Event/WEXIT Phase- 3t 8. R/U &Run 9-5/8" casing scraper to 8300' 9. RIH with HES EZSV bridge plug + GR/CCL on E-line and set at-8200' MD, as required to avoid cutting a casing collar while milling the window. Test CSG to 3,500 psi. POOH. 10. P/U and RIH with 9-%" Baker bottom-trip anchor whip stock assembly. Orient whipstock and set on EZSV bridge plug. Shear off of whip stock. 11. Hang off milling BHA on storm packer to change out 9 5/8" pack-off 12. Change out and test 9-5/8" pack-off through the BOP stack. 13. Retrieve storm packer. 14. Displace the well to 9.1 ppg LSND based milling fluid. Completely displace the well prior to beginning milling operations. End of Sundry Notice Rig Operations— Drilling Permit: flu 15. Mill window in 9-%" casing plus approximately 20' beyond middle of window. Circulate well bore clean. 16. Pull up into 9-%" casing and perform LOT. POOH. 17. M/U 8-Y2" GR/RES/PWD/MWD assembly. RIH, RE-ENTRY Event/ INT1 Phase- A-25B Sidetrack Page 7 18. Kick off and drill the -/2" intermediate section with LSND drilling tlLifd, weighting up to 10.1 ppg and adding black products as needed prior to entering HRZ. 19. Drill ahead to the 7"csg point at top of the Sag River, as per the directional plan. Casing point is estimated at-10,967'. Circulate the well clean, short trip as needed. POH. 20. Change out upper VBRs to 7"casing rams. • "Tit 21. MU and run 7", 26#, L-80, VAM-TOP HC intermediate liner. Circulate and condition the hole. 22. Cement the 7" liner to 1000' above shoe. Test floats on bump. 23. Test the liner and 9-5/8" casing to 3,500 psi for 30 charted minutes. 24. Change out upper 7" casing rams to VBRs. 25. M/U the 6-W Dir/GR/Res/Neu/Den/BAT Sonic assembly with an insert bit. Pick Up DP as necessary. 26. RIH, Drill out of cement and 7" liner float equipment. 27. Displace to 8.4 ppg Flo Pro Fluid. 28. Continue drilling out the 7" shoe plus-20' new formation, pull up into the shoe and perform a FIT. RE-ENTRY Event/ PROD1 Phase- 29. Drill the 6-'/8' production interval as per directional plan to estimated TD of 11,688'. 30. POOH. MAD pass 7" Liner with BAT Sonic to obtain CBL. L/D BHA. 31. If CBL is of poor quality, Rig up E-line and perform USIT log from bottom of 7" liner shoe to-y 9,500' COMPLETION Event/RUNPRD Phase- 32. MU and RIH to bottom with 4-Y2", 12.6#, Chrome liner. This will include 150' liner lap inside the 7" Casing 33. Cement the liner:-- 34. Set liner top packer and displace well to clean seawater above the liner top. A pert pill will be left in the 4-'/2" liner. 35. POOH, L/D LRT. 36. Pressure test casing and liner to 3,500 psi for 30 minutes. COMPLETION Event/ RUNCMP Phase- 37. R/U and run a 4-%2", 12.6#, 13Cr, VamTop tubing completion, stinging into the 4-%2" liner tie back sleeve. 38. Space out and make up tubing hanger per Cameron Rep. 39. Land the tubing hanger, and run in lock down screws. 40. Circulate Corrosion Inhibitor 41. Drop ball and rod. Set packer and individually test the tubing and annulus to 3,500 psi for 30 minutes. Record each test. 42. Shear Circulating Valve 43. Set a TWC and test to 500 psi from below.' 44. Nipple down the BOPE. Nipple up the tree and test to 5,000 psi. . 45. Pull TWC 46. Freeze protect the well to-2,200'ND. Set BPV, test from below to 500 psi and secure the well. 47. RD and Move Off. Post-Riq Operations: 1. MI/ RU slick line. Pull the ball and rod/ RHC plug from landing nipple below the production packer. 2. Pull DCK shear valve and run GLV design. 3. Log SCMT from PBTD to top of 4.5" LNR 4. Perforate as per asset 5. Install well house and instrumentation. 6. Install S-Riser As Needed A-25B Sidetrack Page 8 Drilling Critical Issues • POST THIS NOTICE IN THE DOGHOUSE I. Well Control / Reservoir Pressures: Interval Psi (EMW) TVDss Ivishak Zone 4-1 3,280 psi (7.2 ppg) 8800 II. Lost Circulation/ Breathing: A. Care should be taken to pick the 7" casing point pick and avoid drilling into the Sag where lost circulation potential is high with the planned intermediate hole mud weight. B. Wellbore breathing should be considered a possibility in Colville. Monitor closely and adjust 9 p tY Y drilling practices to minimize the potential. Ill. Kick Tolerance/ Integrity Testing: Kick Tolerance/Integrity Testing Summary Table Casing/Interval Casing Test Calculated Influx Mud Exp Pore LOT/FIT Pressure Volume Weight Press Intermediate Liner A 10.4 LOT with a 81/" Hole 3500 psi 7.65 Pore Pressure 10.1 7.15 (Sag) LOT gives 179 BBLS A 10.0 FIT with a Production Liner 7.15 6-1/8" Hole 3500 psi 7.65 Pore Pressure 8.5 (Ivishak) FIT gives Infinite kick vol. IV. Stuck Pipe A. There could be differential sticking across the production interval while running the 4 'h" liner. Keep the casing moving as much as possible and follow the centralizer program to help with standoff. V. Hydrogen Sulfide A. Standard Operating Procedures for H2S precautions should be followed at all times. Well Name H2S Level Reading Date Parent Well(if sidetrack) A-25 N/A perfs cemented #1 Closest SHL Well H2S Level A-26 22 ppm 3/24/2010 #2 Closest SHL Well H2S Level A-24 36 ppm 11/1/2009 #1 Closest BHL Well H2S Level A-13 110 ppm 7/20/2010 #2 Closest BHL Well H2S Level A-04 40 ppm 7/14/2010 Max. Recorded H2S on Pad/Facility A-43 400 ppm 6/4/1999 Other Relevant H2S Data A-Pad is considered an H2S pad (H2S alarms from rigs,etc.) VI. Faults There are no expected fault crossings for A-25B. In the event of lost circulation, the BP Lost circulation decision tree will be followed. CONSULT THE A-Pad DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION A-25B Sidetrack Page 9 TREE= 6"CIW WELLHEAD= McEVOY • SOY NOTES: WARNING:RADIO TRANSMITTER IN ACTUATOR= OTIS A-2 5A WEATHER MONITORING SHACK MUST BE TURNED OFF KB.ELEV= `_87.68' BEFORE ANY WELL WORK INVOLVING IXPLOSIVES BF.ELEV= 51.98' CAN BEGIN.CONTACT PAD OPERATOR A-25A HAS KOP_ 1100' CMT PLUG FROM TD TO 11883'. Max Angle= 58 @ 10000' _ Datum MD---:- Datum ND= 8800'SS ' ' 2425' H4-1/2"HES X NIP,ID=3.813" 13-3/8"CSG,72#,L-80,ID=12.347" —I 3152' I---■ 4-1/2'TBG,12.6#,L-80,.0152 bpf,ID=3.958" —I 3310' I / \ { 3311' H4-112"WLEG Minimum ID =3.813" @ 2425' 4-1/2" HES X NIPPLE GAS LIFT MANDRELS ST MD ND DEV TYPE VLV LATCH PORT DATE ITOP OF 7"BOT HGR TIEBACK SLV H 11486' 1'1"1'1'1'1'1 1'1, 11883' H TOP OF CMT P&A PLUG 11/11111 ►11111111 19-5/8"CSG,47#,L-80,ID=8.681" H 11957' 11111111111 .. PO4••••• 11111111/1140' 7"MILLOUT WINDOW 11111111111111111. 12109'-12121' 111111111♦ ►1111111111'. 11111111111•. f.`111/111•••••••••••1111111�♦ ITOPOFWHIPSTOCK 12109' ..11•••••111/11 •1111111111111. �111111/111111�. 4��1414/1111111111114111/1v1. X4•••••••••••••, 1/1111/1/1/11∎. 7"CIBP H 12127' 4V,1/141111111..1111111111 . 1111/11111111111, 1,1111111/111/1/11/1111111■t 1.v 1�1i1111111111111111111/1/11/111/11111•111.�. PERFORATION SUMMARY 0"44 ` X1....W. 1/1111. REF LOG: •1'r 1.41 I 1`11/1/111111111111111111111�•, t�(-f 11/111`11. `1111111111111♦ sc '°'° ANGLEATTOPPERF: 7Avg v♦ •.1111111111111. •••••� 11111111111111. Note: Refer to Production DB for historical perf data I •1,11• � 1111111111111*j� SIZE SFF INTERVAL Opn/Sqz DATE I 1A.� 44111111111111� �34y �.ia.�.�a 1`4j1j1j1•1•1•1•1•1•1•1•1•�•'■!1.1.1.1.1•/�� `•111111111111 t 111 •.111111111 Zoc, 1 P **' 11' ...�. 1111111111111111 6.125"P&A'd OPEN HOLE 13092' ►1111111, 111111111111111; SIDETRACK TD ►11111111111111 ►111111/1111111, 1111111/11111111." ►1//1111/111111 ►1•1•1•1•1•1111 100041 ►1111111111111111 17"LNR,26#,L-80,ID=6.276" H 12817' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 08/23/82 ORIGINAL COMPLETION 05/24/01 RN/TP CORRECTIONS WELL: A-25A 07/13/89 RWO 11/22/01 RIG SIDETRACK (P&A'D) PERMIT No: 201-1480 04/09/97 TBG PUNCH 12/29/01 CH/TP CORRECTIONS AR No: 50-029-20764-01 02/06/01 SIS-MH CONVERTED TO CANVAS 2651'SNL&1703'WEL,Sec.35,T11 N,R 13E 03/05/01 SIS-LG FINAL BP Exploration(Alaska) TREE= 6"OW 'ROPOSED WELLHEAD= McEVOY • A ACTUATOR= OTIS 2 5 B SA NOTES: WARNING:RADIO TRANSMITTER IN WEATHER MONITORING SHACK MUST BE TURNED OFF KB.ELEV= 87.68' BEFORE ANY WELL WORK INVOLVING EXPLOSIVES BF.ELEV= 51.98' CAN BEGIN.CONTACT PAD OPERATOR A-25A HAS KOP= 1100 CMT RUG FROM TD TO 11883 _Max Angle=a- _58 et 10000' Dtum MD; Datum TVD= 8800'SS I -.2000 H4-1/2"HES X NIP,ID=3.813" 13-3/8"CSG,72#, L-80, ID=12.347' 1 3152' I—A 7"x 9-5/8"Casing hanger/Packer 1 8050' I C • GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 1 '3500 50 Minimum ID =3.813" @ 2000' 2 '5000 52 4-1/2" HES X NIPPLE 3 °5800 48 4 6400 46 5 '7000 46 TOP OF WHIPSTOCK -j 8200' 7"CIBP — TOP OF 7"BOT HGR TIEBACK SLV H 11486' I— 111 '1'11 11'1 1 1111111 9-5/8"CSG,47#,L-80, ID=8.681" H 11957' I m 11 111111j111j1111j m 11111111111111111 WAWA.. 111111111 11111111♦ ►11111111. 1111111111 , 11111111111 . .1111111111111. •11111111111. `11111111111N. 1•1111111111111111111111 1 4�•1•1•1•1•1•1•1•1•1 1•1 1•1 1•1 1•1 1 1 1, 14111111111111 4`11�1,11 fr4 10,700' Ra-t/a"x 7"PKR CI ■ ■■ XXXX I 4-1/2"TBG,12.6# �1�1�1�1'1�1 113-CR, ID=3.833" PERFORATION SUMMARY 11111 111111111111 REF LOG: ■•■•■•ia1el –10,800 --I4-1/2"x 7"Liner Hanger I ANGLE AT TOP PERF: �11/1� I • • Note:Refer to Production DB for historical perf data ivvvvv. SIZE SFF INTERVAL Opn/Sgz DATE -I 1.f 1 V 1 T M –10970' I D '0,111111.VI W. 1111( 1 1111a 11111 ' 11111 111111111 11111 11111'11111 11111 111111111 111111111 11111 11111' 1 11111111111 11111111i1 7"LNR,26#,L-80, ID=6.276" 12817' i1i1i1mi 14.5", 12.6#,13-Cr, ID 3.95" I —11600' I DATE REV BY CONVENTS DATE REV BY CONVENTS PRUDHOE BAY UNIT 08/23/82 ORIGINAL COMPLETION 05/24/01 RN/TP CORRECTIONS WELL: A-25 07/13/89 RWO 11/22/01 RIG SIDETRACK (P&A'D) PERMIT No: XXX-XXXX 04/09/97 TBG PUNCH 12/29/01 CHITP CORRECTIONS API No: 50-029-20764 02/06/01 SIS-MI CONVERTED TO CANVAS 2651'SNL&1703'WEL,Sec.35,T11 N, R 13E 03/05/01 SIS-LG FINAL BP Exploration(Alaska) � 9r • • , , ,, ,. ., ,, k 4.y4: i„, ::.!,,.,, „ ., ,:;-:: ;:,. ifi BP - Alaska i , Prudhoe Bay PB A Pad 4 A-25 f s Plan A-25B 4 I Plan: A-25B WP8.0 Y. X Standard Proposal Report is z 16 November, 2010 AZ. .:. Y 4 } 5 e S: `3 r t ? g ai z S h , HALLIBURTON Aliam �, Sperry Drilling Services Ail j'r n4 • 0 Halliburton Company HAL,LIBURTON Standard Proposal Report Database: .Sperry EDM.16 PRD Local Co-ordinate Reference: Well A-25 Company: BP-Alaska TVD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25( Project: Prudhoe Bay MD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25( Site: PB A Pad North Reference: True Well: A-25 Survey Calculation Method: Minimum Curvature Wellbore: Plan A-25B Design: A-25B WP8.0 Project Prudhoe Bay,North Slope,UNITED STATES Map System: US State Plane 1927(Exact solution) System Datum: Mean Sea Level Geo Datum: NAD 1927(NADCON CONUS) Using Well Reference Point Map Zone: Alaska Zone 04 Using geodetic scale factor Site PB A Pad,TR-11-13 Site Position: Northing: 5,946,131.57ft Latitude: 70°15'35.209 N From: Map Easting: 653,509.42ft Longitude: 148°45'32.77 W Position Uncertainty: 0.00 ft Slot Radius: 0" Grid Convergence: 1.17° Well A-25 Well Position +N/-S 0.00 ft Northing: 5,947,780.00 ft Latitude: 70°15'51.382 N +E/-W 0.00 ft Easting: 653,697.00 ft Longitude: 148°45'26.34 W i Position Uncertainty 0.00 ft Wellhead Elevation: ft Ground Level: 0.00ft Wellbore Plan A-25B Magnetics Model Name Sample Date Declination Dip Angle Field Strength (°) r) (nT) BGGM2009 12/31/2010 21.84 80.91 57,705 Design A-25B WP8.0 Audit Notes: Version: Phase: PLAN Tie On Depth: 8,210.00 Vertical Section: Depth From(TVD) +N/-S +E/-W Direction (ft) (ft) (ft) (°) 44.48 0.00 0.00 28.78 Plan Sections Measured Vertical TVD Dogleg Build Turn Depth Inclination Azimuth Depth System +N/-S +E/-W Rate Rate Rate Tool Face (ft) (0) (0) (ft) ft (ft) (ft) (°1100ft) (°1100ft) (°1100ft) (0) 8,210.00 49.90 42.65 6,081.59 5,990.11 4,098.14 2,690.71 0.00 0.00 0.00 0.00 8,230.00 51.13 39.98 6,094.31 6,002.83 4,109.74 2,700.90 12.00 6.15 -13.35 -60.00 8,250.00 51.13 39.98 6,106.86 6,015.38 4,121.67 2,710.91 0.00 0.00 0.00 0.00 8,425.00 48.47 33.40 6,219.87 6,128.39 4,228.65 2,790.80 3.25 -1.52 -3.76 -120.00 9,793.62 11.89 328.20 7,403.26 7,311.78 4,805.40 3,009.59 3.25 -2.67 -4.76 -164.52 10,977.22 11.89 328.20 8,561.48 8,470.00 5,012.60 2,881.13 0.00 0.00 0.00 0.00 11,600.59 11.89 328.20 9,171.48 9,080.00 5,121.73 2,813.48 0.00 0.00 0.00 0.00 /1/16/2010 11:21:54AM Page 2 COMPASS 2003.16 Build 71 Halliburton Company HALL_IBURTON Standard Proposal Report Database: .Sperry EDM.16 PRD Local Co-ordinate Reference: Well A-25 Company: BP-Alaska TVD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25( Project: Prudhoe Bay MD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25( Site: PB A Pad North Reference: True Well: A-25 Survey Calculation Method: Minimum Curvature Wellbore: Plan A-25B Design: A-25B WP8.0 Planned Survey Measured Vertical Map Map Depth Inclination Azimuth Depth TVDss +N/-S +El-W Northing Easting DLS Vert Section (ft) (°) (1 (ft) ft (ft) (ft) (ft) (ft) -5,990.11 8,210.00 49.90 42.65 6,081.59 -5,990.11 4,098.14 2,690.71 5,951,931.91 656,303.30 0.00 4,887.36 KOP/Start Dir 12°/100':8210'MD,6081.59'7VD:60°LT TF 8,230.00 51.13 39.98 6,094.31 -6,002.83 4,109.74 2,700.90 5,951,943.71 656,313.25 12.00 4,902.43 End Dir :8230'MD,6094.31'TVD 8,250.00 51.13 39.98 6,106.86 -6,015.38 4,121.67 2,710.91 5,951,955.85 656,323.01 0.00 4,917.70 Start Dir 3.25°/100':8250'MD,6106.86'TVD 8,300.00 50.33 38.15 6,138.50 -6,047.02 4,151.72 2,735.30 5,951,986.39 656,346.78 3.25 4,955.79 8,400.00 48.83 34.37 6,203.35 -6,111.87 4,213.07 2,780.34 5,952,048.64 656,390.55 3.25 5,031.24 8,425.00 48.47 33.40 6,219.87 -6,128.39 4,228.65 2,790.80 5,952,064.43 656,400.69 3.25 5,049.93 8,500.00 46.12 32.49 6,270.73 -6,179.25 4,274.89 2,820.78 5,952,111.27 656,429.72 3.25 5,104.90 8,600.00 43.01 31.17 6,341.97 -6,250.49 4,334.49 2,857.80 5,952,171.60 656,465.52 3.25 5,174.96 8,700.00 39.91 29.69 6,416.91 -6,325.43 4,391.55 2,891.35 5,952,229.34 656,497.90 3.25 5,241.13 8,749.74 38.38 28.88 6,455.48 -6,364.00 4,418.93 2,906.72 5,952,257.02 656,512.69 3.25 5,272.52 CM2 8,800.00 36.83 28.00 6,495.30 -6,403.82 4,445.90 2,921.33 5,952,284.28 656,526.75 3.25 5,303.19 8,900.00 33.78 26.06 6,576.90 -6,485.42 4,497.35 2,947.62 5,952,336.26 656,551.99 3.25 5,360.95 9,000.00 30.77 23.78 6,661.44 -6,569.96 4,545.75 2,970.15 5,952,385.10 656,573.52 3.25 5,414.22 9,100.00 27.80 21.06 6,748.65 -6,657.17 4,590.94 2,988.85 5,952,430.66 656,591.29 3.25 5,462.82 9,200.00 24.90 17.75 6,838.25 -6,746.77 4,632.77 3,003.65 5,952,472.78 656,605.24 3.25 5,506.61 9,300.00 22.09 13.65 6,929.96 -6,838.48 4,671.11 3,014.51 5,952,511.33 656,615.31 3.25 5,545.44 9,400.00 19.41 8.45 7,023.47 -6,931.99 4,705.83 3,021.39 5,952,546.18 656,621.48 3.25 5,579.19 9,453.86 18.04 5.05 7,074.48 -6,983.00 4,722.99 3,023.44 5,952,563.38 656,623.18 3.25 5,595.22 CM1 9,500.00 16.92 1.73 7,118.49 -7,027.01 4,736.82 3,024.27 5,952,577.22 656,623.73 3.25 5,607.74 9,600.00 14.72 352.92 7,214.70 -7,123.22 4,763.99 3,023.15 5,952,604.36 656,622.05 3.25 5,631.01 9,700.00 12.96 341.47 7,311.81 -7,220.33 4,787.24 3,018.01 5,952,627.50 656,616.44 3.25 5,648.92 9,793.62 11.89 328.20 7,403.26 -7,311.78 4,805.40 3,009.59 5,952,645.48 656,607.66 3.25 5,660.78 End Dir :9793.62'MD,7403.26'TVD 9,795.89 11.89 328.20 7,405.48 -7,314.00 4,805.80 3,009.35 5,952,645.87 656,607.40 0.00 5,661.01 THRZ 9,800.00 11.89 328.20 7,409.50 -7,318.02 4,806.51 3,008.90 5,952,646.58 656,606.94 0.00 5,661.42 9,900.00 11.89 328.20 7,507.36 -7,415.88 4,824.02 2,998.05 5,952,663.86 656,595.73 0.00 5,671.54 10,000.00 11.89 328.20 7,605.21 -7,513.73 4,841.53 2,987.20 5,952,681.14 656,584.53 0.00 5,681.66 10,013.56 11.89 328.20 7,618.48 -7,527.00 4,843.90 2,985.72 5,952,683.48 656,583.01 0.00 5,683.03 LCU 10,100.00 11.89 328.20 7,703.07 -7,611.59 4,859.03 2,976.34 5,952,698.42 656,573.32 0.00 5,691.78 10,102.46 11.89 328.20 7,705.48 -7,614.00 4,859.46 2,976.07 5,952,698.85 656,573.04 0.00 5,692.03 TJF 10,192.39 11.89 328.20 7,793.48 -7,702.00 4,875.21 2,966.31 5,952,714.39 656,562.96 0.00 5,701.13 TJE 10,200.00 11.89 328.20 7,800.92 -7,709.44 4,876.54 2,965.49 5,952,715.70 656,562.11 0.00 5,701.90 10,300.00 11.89 328.20 7,898.78 -7,807.30 4,894.04 2,954.63 5,952,732.98 656,550.90 0.00 5,712.01 10,400.00 11.89 328.20 7,996.64 -7,905.16 4,911.55 2,943.78 5,952,750.26 656,539.69 0.00 5,722.13 10,500.00 11.89 328.20 8,094.49 -8,003.01 4,929.06 2,932.93 5,952,767.54 656,528.49 0.00 5,732.25 11/16/2010 11:21:54AM Page 3 COMPASS 2003.16 Build 71 0 . Halliburton Company HALLIBURTON Standard Proposal Report Database: .Sperry EDM.16 PRD Local Co-ordinate Reference: Well A-25 Company: BP-Alaska TVD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25( Project: Prudhoe Bay MD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25( Site: PB A Pad North Reference: True Well: A-25 Survey Calculation Method: Minimum Curvature Welibore: Plan A-25B Design: A-25B WP8.0 Planned Survey Measured Vertical Map Map Depth Inclination Azimuth Depth TVDss +N/-S +E/-W Northing Easting DLS Vert Section (ft) (0) (°) (ft) ft (ft) (ft) (ft) (ft) -8,061.00 10,559.26 11.89 328.20 8,152.48 -8,061.00 4,939.43 2,926.50 5,952,777.78 656,521.84 0.00 5,738.24 TJD 10,600.00 11.89 328.20 8,192.35 -8,100.87 4,946.56 2,922.07 5,952,784.82 656,517.28 0.00 5,742.37 10,669.63 11.89 328.20 8,260.48 -8,169.00 4,958.75 2,914.52 5,952,796.85 656,509.47 0.00 5,749.41 TJC 10,700.00 11.89 328.20 8,290.20 -8,198.72 4,964.07 2,911.22 5,952,802.10 656,506.07 0.00 5,752.48 10,800.00 11.89 328.20 8,388.06 -8,296.58 4,981.58 2,900.37 5,952,819.38 656,494.86 0.00 5,762.60 10,813.72 11.89 328.20 8,401.48 -8,310.00 4,983.98 2,898.88 5,952,821.75 656,493.33 0.00 5,763.99 TJB 10,900.00 11.89 328.20 8,485.91 -8,394.43 4,999.08 2,889.51 5,952,836.66 656,483.65 0.00 5,772.72 10,977.22 11.89 328.20 8,561.48 -8,470.00 5,012.60 2,881.13 5,952,850.00 656,475.00 0.00 5,780.53 TSGR-7 5/8"-A-25B Tgt1 rev2 5 952 853.94 656 472.45 0.00 5,782.84 11,000.00 11.89 328.20 8,583.77 -8,492.29 5,016.59 2,878.66 , 11,006.86 11.89 328.20 8,590.48 -8,499.00 5,017.79 2,877.92 5,952,855.12 656,471.68 0.00 5,783.53 TSHU 11,089.63 11.89 328.20 8,671.48 -8,580.00 5,032.28 2,868.93 5,952,869.42 656,462.40 0.00 5,791.91 TSAD 11,100.00 11.89 328.20 8,681.63 -8,590.15 5,034.09 2,867.81 5,952,871.22 656,461.24 0.00 5,792.96 11,130.51 11.89 328.20 8,711.48 -8,620.00 5,039.43 2,864.50 5,952,876.49 656,457.82 0.00 5,796.04 45SB 11,200.00 11.89 328.20 8,779.48 -8,688.00 5,051.60 2,856.95 5,952,888.49 656,450.03 0.00 5,803.07 11,222.48 11.89 328.20 8,801.48 -8,710.00 5,055.53 2,854.51 5,952,892.38 656,447.51 0.00 5,805.35 42SB 11,291.97 11.89 328.20 8,869.48 -8,778.00 5,067.70 2,846.97 5,952,904.39 656,439.72 0.00 5,812.38 TCGL 11,300.00 11.89 328.20 8,877.34 -8,785.86 5,069.11 2,846.10 5,952,905.77 656,438.82 0.00 5,813.19 11,373.72 11.89 328.20 8,949.48 -8,858.00 5,082.01 2,838.10 5,952,918.51 656,430.56 0.00 5,820.65 BCGL 11,400.00 11.89 328.20 8,975.19 -8,883.71 5,086.61 2,835.25 5,952,923.05 656,427.62 0.00 5,823.31 11,443.21 11.89 328.20 9,017.48 -8,926.00 5,094.18 2,830.56 5,952,930.52 656,422.77 0.00 5,827.68 23SB 11,471.83 11.89 328.20 9,045.48 -8,954.00 5,099.19 2,827.45 5,952,935.47 656,419.57 0.00 5,830.58 HO/T 11,500.00 11.89 328.20 9,073.05 -8,981.57 5,104.12 2,824.39 5,952,940.33 656,416.41 0.00 5,833.43 11,504.53 11.89 328.20 9,077.48 -8,986.00 5,104.91 2,823.90 5,952,941.12 656,415.90 0.00 5,833.89 22TS 11,531.10 11.89 328.20 9,103.48 -9,012.00 5,109.56 2,821.02 5,952,945.71 656,412.92 0.00 5,836.57 OOWC 11,551.54 11.89 328.20 9,123.48 -9,032.00 5,113.14 2,818.80 5,952,949.24 656,410.63 0.00 5,838.64 21TS 11,600.00 11.89 328.20 9,170.90 -9,079.42 5,121.62 2,813.54 5,952,957.61 656,405.20 0.00 5,843.55 11,600.58 11.89 328.20 9,171.47 -9,079.99 5,121.72 2,813.48 5,952,957.71 656,405.14 0.00 5,843.60 Total Depth:11600.59'MD,9171.48'TVD 11,600.59 11.89 328.20 9,171.48 -9,080.00 5,121.73 2,813.48 5,952,957.71 656,405.13 0.00 5,843.61 I 11/16/2010 11:21:54AM Page 4 COMPASS 2003.16 Build 71 • 0 Halliburton Cornpany H AL LI UPT f Standard Proposal Report Database: .Sperry EDM.16 PRD Local Co-ordinate Reference: Well A-25 Company: BP-Alaska TVD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25@ Project: Prudhoe Bay MD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25@ Site: PB A Pad North Reference: True Well: A-25 Survey Calculation Method: Minimum Curvature Wellbore: Plan A-25B Design: A-25B WP8.0 Targets Target Name Dip Angle Dip Dir. TVD +N/-S +E/-W Northing Easting -Shape (°) (°) (ft) (ft) (ft) (ft) (ft) I A-25B Tgt1 rev2 0.00 0.00 8,561.48 5,012.60 2,881.13 5,952,850.00 656,475.00 -Circle(radius 150.00) 11,600.59 9,171.48 41/2" 4-1/2 6 10,977.22 8,561.48 7 5/8" 7-5/8 8-1/2 3,155.78 2,774.56 13 3/8" 13-3/8 17-1/2 I`Formations Measured Vertical Vertical Dip Depth Depth Depth SS Dip Direction (ft) (ft) ft Name Lithology (`) 10,813.72 8,401.48 TJB I 9,795.89 7,405.48 THRZ 11,089.63 8,671.48 TSAD 11,130.51 8,711.48 45SB 10,013.56 7,618.48 LCU 11,006.86 8,590.48 TSHU 11,471.83 9,045.48 H0/T 11,551.54 9,123.48 21TS 9,453.86 7,074.48 CM1 10,192.39 7,793.48 TJE 1 11,504.53 9,077.48 22TS 10,559.26 8,152.48 TJD 11,531.10 9,103.48 OOWC 11,373.72 8,949.48 BCGL 11,291.97 8,869.48 TCGL 11,222.48 8,801.48 42SB 10,102.46 7,705.48 TJF 10,669.63 8,260.48 TJC 11,443.21 9,017.48 23SB 8,749.74 6,455.48 CM2 10,977.22 8,561.48 TSGR 0.00 Plan Annotations Measured Vertical Local Coordinates Depth Depth +N/-S +E/-W (ft) (ft) (ft) (ft) Comment I 8,210.00 6,081.59 4,098.14 2,690.71 KOP/Start Dir 12°/100':8210'MD,6081.59'TVD:60°LT TF 8,230.00 6,094.31 4,109.74 2,700.90 End Dir :8230'MD,6094.31'TVD 8,250.00 6,106.86 4,121.67 2,710.91 Start Dir 3.25°/100':8250'MD,6106.86'TVD 9,793.62 7,403.26 4,805.40 3,009.59 End Dir :9793.62'MD,7403.26'TVD 11,600.58 9,171.47 5,121.72 2,813.48 Total Depth:11600.59'MD,9171.48'TVD 11/16/2010 11:21:54AM Page 5 COMPASS 2003.16 Build 71 . bp REFERENCE INFORMATIC, HALLI B U RT Co-ordinate(N/E)Reference: Well A-25,True North Vertical(TVD)Reference: D25 @39.5+BFE @51.93=91.48'@ 91.488(025 @39.5+BFE @51.93=91.48') J Sperry Drilling Services Measured Depth Reference D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25(§39.5+BFE @51.93=91.48') Calculation Method: Minimum Curvature 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 3100 3200 3300 5400 • 1 • i i i i i I I i i i i i i i i i I I I , I i i i i I i i i i i i i 5400 - Project:Prudhoe Bay WELL DETAILS: A-25 - Site: PB A Pad Well: A-25 + Ground Level: 0.00 5300- N/-S +E/-W Northing Easting Latittude Longitude Slot -5300 Wellbore: Plan A-25B 0.00 0.00 5947780.00 653697.0070°15 51.382 8848°45'26.34 W Plan:A-25B WP8.0(A-25/Plan A-25B) - 95%con£ - -5200 Total Depth: 11600.59'MD,9171.48'TVD -5200 - A-25/A-25B WP8.0 ' ---" CASING DETAILS I 5100- TVD MD Name Size 4 1/2"- -5100 2774.56 3155.78 13 3/8" 13-3/8 • • 8561.4810977.22 7 5/8" 7-5/8 - 9171.4811600.59 41/2" 4-1/2 5000- --_-..- --_- __.._------- - - �' -5000 - COMPANY DETAILS: BP-Alaska 7 5/8n- End Dir :9793.62'MD,7403.26'TVD - NORTH AMERICA �p� 4900 ALASKA A-25/A-25-4900 - Calculation Method: Minimum Curvature A-25B Tgtl rev2 - Error System: ISCWSA A-25/A-25. - Scan Method: Tray.Cylinder North - Error Surface: Elliptical Conic 4800- Warring Method: Rules Based -4800 - SURVEY PROGRAM 4700-- Date:2010-11-16T00:00:00 Validated:Yes Version: -4700 Depth From Depth To Survey/Plan Tool - 103.78 8210.00 A-25 Gyrodata(A-25) GYD-CT-CMS - _ - 8210.00 8520.00 A-25B WP8.0(Plan A-25B) INC+TREND - r� 5 8520.00 10977.22 A-25B WP8.0(Plan A-25B) MWD+IFR+MS _ •4600 10977.22 11600.59 A-25B WP8.0(Plan A-25B) MWD+IFR+MS - 4600 c o - - N... - _ - o + = tom.,asoo- DDI = 6.12 -4500 +- - ERD = 0.66 - N r - - - S 4400- -4400 o E. - E. v) - • 4300- -4300 A-04/A-04 _ - 4200-, 4200 Start Dir 3.25°/100':8250'MD,6106.86'T� 4100- _ -- -4100 - _- -, ` -- End Dir :8230'MD,6094.31'TVD - -b000 6000 KOP/Start Dir 12°/100':8210'MD,6081.59'TVD:60°LT TF -4000 - 3900- WELLBORE TARGET DETAILS(MAP CO-ORDINATES) -- 3900 Name TVD +N/-S +E/-W Northing Easting Shape - - A-25B Tgt1 rev2 8561.48 5012.60 2881.13 5952850.00 656475.00 Circle(Radius:150.00) - 3800- -- 3800 - SECTION DETAILS - Sec MD Inc Azi ND +N/-S +E/-W DLeg TFace VSec Target - 1 8210.00 49.90 42.65 6081.59 4098.14 2690.71 0.00 0.00 4887.36 - 3700- 2 8230.00 51.13 39.98 6094.31 4109.74 2700.90 12.00 -60.00 4902.43 -3700 3 8250.00 51.13 39.98 6106.86 4121.67 2710.91 0.00 0.00 4917.70 - 4 8425.00 48.47 33.40 6219.87 4228.85 2790.80 3.25 -120.00 5049.93 - 5 9793.82 11.89 32820 740326 4805.40 3009.59 3.25 -164.52 5660.78 - 6 10977.22 11.89 328.20 8561.48 5012.60 2881.13 0.00 0.00 5780.53 A-25B Tgt1 rev2 _ - 7 11800.59 11.89 328.20 9171.48 5121.73 2813.48 0.00 0.00 5843.61 _ 3600 1 1 i i i 1 1 I r r r I j 1 1 1 i i 1 1 1 r I i , i r i i i i ' i I i r I i r , 1 1 1 1 I i I i . i i i I i 3600 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 3100 3200 3300 West(-)/East(+)(200 ft/in) COMPANY DETAILS: BP-Alaska SECTION DETAILS HQLLIBURTON NORTH AMERICA Sec MD Inc Azi TVD +N/-S +E/-W DLeg TFace VSec Target ALASKA �� 1 8210.00 49.90 42.65 6081.59 4098.14 2690.71 0.00 0.00 4887.36 Sperry Drilling Services 2 8230.00 51.13 39.98 6094.31 4109.74 2700.90 12.00 -60.00 4902.43 Calculation Method: Minimum Curvature 3 8250.00 51.13 39.98 6106.86 4121.67 2710.91 0.00 0.00 4917.70 1 Error System: ISCWSA 4 8425.00 48.47 33.40 6219.87 4228.65 2790.80 3.25 -120.00 5049.93 Scan Method: Tray.Cylinder North 5 9793.62 11.89 328.20 7403.26 4805.40 3009.59 3.25 -164.52 5660.78 4800- Error Surface: Elliptical Conic . 6 10977.22 11.89 328.20 8561.48 5012.60 2881.13 0.00 0.00 5780.53 A-25B Tgt1 rev2 Warning Method: Rules Based 7 11600.59 11.89 328.20 9171.48 5121.73 2813.48 0.00 0.00 5843.61 5200 WELLBORE TARGET DETAILS(MAP CO-ORDINATES) J KOP/Start Dir 12°/100':8210'MD,6081.59'TVD:60°LT TF Name TVD +N/-S +E/-W Northing Easting Shape A-25B Tgt1 rev2 8561.48 5012.60 2881.13 5952850.00 656475.00 Circle(Radius:150.00) 5600 WELL DETAILS: A-25 End Dir :8230'MD,6094.31'TVD Ground Level: 0.00 - .-'- +N/-S +E/-W Northing Easting Latittude Longitude Slot 6000 -\CM2 0.00 0.0(5947780.00 653697.0070°15'51.382 N148°4526.34 W REFERENCE INFORMATION Start Dir 3.25°/100':8250'MD,6106.86'TVD Co-ordinate(N/E)Reference: Well A-25,True North Vertical(TVD)Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25 @39.5+BFE@51.93=91.48') 6400 Measured Depth Reference: D25 @39.5+BFE @51.9391.48'@ 91.48ft(D25(g39.5+BFE @51.9391.48') - -- - - Calculation Method: Minimum Curvature SURVEY PROGRAM 6800 DDI =6.12 2010-11-16T00:00:00 Validated:Yes Version: Z M __ ERD = 0.66 I Depth From Depth To Survey/Plan Tool - _ _ 103.78 8210.00 A-25 Gyrodata(A-25) GYD-CT-CMS o THRZ 8210.00 8520.00 A-25B WP8.0(Plan A-25B) INC+TREND -- _ End Dir :9793.62'MD,7403.26'TVD 8520.00 10977.22 A-258 WP8.0(Plan A-258) MWD+IFR+MS 7200 - - 10977.22 11600.59 A-25B WP8.0(Plan A-25B) MWD+IFR+MS i LC U a) C CASING DETAILS FORMATION TOP DETAILS 7600 - TJF- - - _ - - TVD MD Name Size TVDPath MDPath Formation 2774.56 3155.78 13 3/8" 13-3/8 6455.48 8749.74 CM2 9) TJE - 8561.48 10977.22 7 5/8" 7-5/8 7074.48 9453.86 CM1 ` 9171.48 11600.59 4 1/2" 4-1/2 7405.48 9795.89 THRZ l- 8000 TJD__ - - 7618.48 10013.56 LCU TJC_.__ - - - 7705.48 10102.46 TJF ------ ___ 7 7 5/8" 7793.48 10192.39 TJE TJB- _ A-25B Tgt1 rev2 8152.48 10559.26 TJD - - __ _ 8260.48 10669.63 TJC 8400 TSGR--_ - ,- 8401.48 10813.72 TJ - i,',, 8561.48 10977.22 TSG TSHU-- 8590.48 11006.86 TSHU 871.48 11089.63 TSAD TSAD 8711.48 11130.51 45SB 8800- 45SB--_- - 8801.48 11222.48 42SB __ -- _ 8869.48 11291.97 TCGL 42SB- . -- 8949.48 11373.72 BCGL _ TCGL 4 1/2" A-25/A-25A 9017.48 11443.21 2356 BCGL z, A-04/A-04 9045.48 11471.83 HO/T 9077.48 11504.53 22TS 9200 23SB �, '� ' 9103.48 11531.10 OOWC A-25/A-25 9123.48 11551.54 21TS HO/T , 9600 1 22TS Total Depth: 11600.59'MD,9171.48'TVD Project: Prudhoe Bay oowc• Site: PB A Pad 21TS A-25/A-25B WP8.0 Well: A-25 Wellbore: Plan A-25B 1oo00 -- - r r -- --- --I _ 7-r --T Plan:A-25B WP8.0(A-25/Plan A-25B) 3200 3600 4000 4400 4800 5200 5600 6000 6400 6800 7200 7600 8000 8400 6e,-crz.,., .■..... - Vertical Section at 28.78°(800 ft/in) • o C • u O ry a e o rim •iQ i W m m ' I_' O.11 n w� w, I •�' ' .7% L-' aumn°ONNV umi cn IT M m 0 ,,,,�- , �'�, N Y .9O�V WOmV v3 10 n .%1, , ` u m o 00 i00I0oo ,tM 40 01. 6 26666466 Cui a o ,i. / � oS J N C Z ` U V' 0000ONNO0 ". ". Agt*"41 M N wort w 00006�6 W▪ OW O Q virpow J 0MW p NW , W nO9m NNNNMNN C1'1 m T W !H:HH p...r U L W N 7c0 O fNpm�j o O I W „7,....... D N N _N O� � NOIOfhmmm o z oro vM9 n m N33 C1 2 C o u u ,` _-' C U 0 0 0 O O _ crn„mm o 2 M :--, Vn..t° 2222" N U ial r W , O O O O O O N N M 2 v w m K K 4 c N O O O O W N W Ow b K W ON j NNMr--0 Z U N 0 m m m m m 0 o aid O V U 5 n.-NhVt00, y° >N 2° +O p E o CI 000000002. 2 O 0 0 0 0 N O Lg.'. O N O t` O N 8 O N P. I— 09 m m OD 01 QI Of 01 . . . . . . O 111 11111 0 U E O N 0 m O m O m O m 0 0 0 N N m O N C0 O N O C O O O 01 01 1 O O O m LL C 1n N y CO I 6 O 0 0LON m m 'N 1f. N O,-a 1+.._1_ `_� C 2 .— m N m �� /W.. _`_ N O 0 WW W 5.8'2301 dfrAArAwAlibil_ 4110. . ..g *4 N dm ,461.-,461.-:.,z W r cn U AO U ° !� V*.�I EQ z ma9m� i1'arm* ` U o s• +CF (T) m LL N P 2 .-oo: _J ZEMr--.4. t ab. BlIZIA&Wilt; 4., 4u4 Z c rn�: ¢ .L. ,z pmNO % i l , /Xf20 Cp y d 0 f�0 f,l t � • O , V ®r � w U O 7, t _ CO,CC m Wai rgiii'MA WA, CC re W ' .,2 ,.....,=, Ykric■ '` 7vmpriwimi t: .= , .g, .4.9.6 0. V• ' r m a C0.� m■ O L « 1n C q- m • m C o O 7 . U `� - O - N N Q 3a O u U u 488:1g un CL Q •WQ U `.am E C n : v Q 410000.0. `m XQ ll':i'Q Q m C . 1 N ., E w o'o. o r L Z �N�� .0 0 cr.o H r O O O� N C N•N t^000 Z m WNW j•_ LT 7i L G 5 C A 0 i O • BPPASSPORT 0 Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25 @39.5+ Reference Site: PB A Pad MD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25 @39.5+ Site Error: 0.00ft North Reference: True Reference Well: A-25 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan A-25B Database: EDM.16-ANC Prod-WH24P Reference Design: Plan A-25B Wp8.0 Offset TVD Reference: Offset Datum Reference Plan A-25B Wp8.0 Filter type: GLOBAL FILTER APPLIED:All wellpaths within 200'+100/1000 of refere Interpolation Method: MD Interval 25.00ft Error Model: ISCWSA Depth Range: 8,210.00 to 11,600.59ft Scan Method: Tray.Cylinder North Results Limited by: Maximum center-center distance of 1,355.96ft Error Surface: Elliptical Conic Survey Tool Program Date 11/16/2010 I From To (ft) (ft) Survey(Wellbore) Tool Name Description 103.88 8,210.00 A-25 Gyrodata(A-25) GYD-CT-CMS Gyrodata cont.casing m/s 8,210.00 8,520.00 Plan A-25B Wp8.0(Plan A-25B) INC+TREND Inclinometer+known azi trend 8,520.00 10,977.22 Plan A-258 Wp8.0(Plan A-25B) MWD+IFR+MS MWD+IFR+Multi Station 10,977.21 11,600.59 Plan A-25B Wp8.0(Plan A-25B) MWD+IFR+MS MWD+IFR+Multi Station Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well-Wellbore-Design (ft) (ft) (ft) (ft) PB A Pad ' A-04-A-04-A-04 10,302.29 9,800.00 818.64 1,030.32 -179.54 FAIL-Major Risk A-06-A-06-A-06 Out of range A-07-A-07-A-07 Out of range A-09-A-09-A-09 Out of range A-09-A-09A-A-09A Out of range A-11 -A-11 -A-11 Out of range A-12-A-12-A-12 Out of range A-12-A-12A-A-12A Out of range A-13-A-13-A-13 Out of range A-23-A-23-A-23 Out of range A-24-A-24-A-24 Out of range A-24_DIMS-A-24-A-24 Out of range A-25-A-25-A-25 8,600.93 8,600.00 36.12 224.81 -188.14 FAIL-Major Risk A-25-A-25A-A-25A 8,608.31 8,600.00 37.17 224.88 -186.93 FAIL-Major Risk A-25_DIMS-A-25-A-25 Out of range A-25_DIMS-A-25A-A-25A Out of range A-26-A-26-A-26 Out of range A-26-A-26L1 -A-26L1 Out of range A-26-A-26L1 PB1 -A-26L1 PB1 Out of range A-29-A-29-A-29 Out of range A-34-A-34-A-34 Out of range A-34A-A-34A-A-34A Out of range A-35-A-35-A-35 Out of range A-39-A-39A-Plan 5 Out of range A-43-A-43-A-43 Out of range PB D Pad 0-09-0-09-D-09 Out of range 11/16/2010 11:15:07AM Page 2 of 3 COMPASS 2003.16 Build 73 • BPPASSPORT • Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well A-25 Project: Prudhoe Bay TVD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25 @39.5- Reference Site: PB A Pad MD Reference: D25 @39.5+BFE @51.93=91.48'@ 91.48ft(D25 @39.5- Site Error: 0.00ft North Reference: True Reference Well: A-25 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan A-25B Database: EDM.16-ANC Prod-WH24P Reference Design: Plan A-25B Wp8.0 Offset TVD Reference: Offset Datum Reference Depths are relative to D25 @39.5+BFE @51.93=91.48'@ Coordinates are relative to:A-25 Offset Depths are relative Co'Offset Datum Coordinate System is US State Plane 1927(Exact solution),Alaska Zone 04 Central Meridian is 150°0'0.000 W° Grid Convergence at Surface is:1.17° Ladder 1 I , P FV t i - I 1 1400 . I I I I I I r ' 1 I I I I I I I I I I I I I I J J J J _ _ __J_ _ _ _ _ I I 1 I I I I I I I I i. I 1 I I I I I i I 1 1050 in I I I I I I L11 I I I i I r: - I a 1 I I I I I C I I I I 1 I O _ J J J J _ _ __J_ _ - - J _ - f� 1 I I I `i I is I I I 1 Q I •1 I 1 1 1 I I I 1 cu I CO 700 Z+ I I I I I O 1 1 I I I I C 1 I I I I I O I I I 1 I I (.-> J _I _ _ __ J J J '''S J _ _ O I I I I I I - I I I I I 1 T 1 1 I I 1 I 1= I I I I it I 1 c) 350 I I I I I ii 1 I I I I I I I I I 1 J _ _ __J J ____ J!lt___ _ J _ _ I I I I I I 1 I I 1 V,/ I I I I p' I I ' I I �r i ' 0 ' 0 2000 4000 6000 8000 10000 12000 M easee)i @Api)i(2000 Win) A-03,A-03,A-0 3 V1 -)4- A-12,A-12A,A-12AV2 A-27,A-27A,A-27AV2 A-04,A-04,A-0 4 V1 -9- A-13,A13,A-13 V1 A-29,A-29,A-29 V1 - f, .A-05,A-05,A-05V9 -0- A-23,423,A-23 V1 A-3 3,A-33,A-3 3 V2 A-05,A-05A,A-05AV6 -X- A-24,A24,A-24Vt A-34,A-34,A-34 V2 A-05,A05A,A-05Awp11 V52 -3-- A-24_13MS,A-24,A-24VD -9- A-3 4A,A-3 4A A-34AV1 A-OS,A-O8,A-OS V1 -e- A-25.A-25,A-25 V12 A-35,A-3 5,A-35 V1 .A-07,A-07,A-07 V2 -9-- A-25,A-25A,A-25AV14 -4-- A-39.A-39,A.39 V1 A-08,A-08,A-O8 V1 -0- A-25_0MS,A-25,A-25 VO -9- A-39,A-39A,Pt;tn5"O A-09,A-09,A-09 V1 -B- A-25_DMS,A-25A,A-25AVU $ A-40,A-40,A-40 VI A-09,A-09A,A-00AV1 -4- A-26,A 2S A-25 V1 A-43,A-43,A-43 V1 11/16/2010 1 1:15:07AM Page 3 of 3 COMPASS 2003.16 Build 73 • • 2 g pe, '1 o 1 oil op 0 i , 5' 3, 3-- Lo' `4 .7 a! --■ z . z 0 -J >7 1 N A 4 4 d •>.• .1 S- -.-3., _9 3 -• 'ra r.1 0 ,T. PI LIO IL E _LI 1 0 0— tk 0 04 °k 4 o 4 it, 11 ---an1 . - Tk9 - ' 1111; `' -• , ! I i k A011 ' - 1 0- t K tt, i M. ..,11. ki MIME 710-4 ww_,Ewi-- I. ---1 „.., ii■k v..-111 -11••y:til in III Kii 1 „, ,m , ., 40,--1,0 A' 1 -& co H1 IL",i! ‘ r . ioffiv ., - 0-- iii_ K.= als., ri,,.. -• _ i • Gt N.F_: ,Li am , ., -•_.; ‘..-., a= , ,., , ,. . .-_-:.1 •••• 'T---; 7. g ..-=.:5 ....:.::: ,.....,,,,_. ••••,1 I , ! 1 ••OM: E.',::: 7 F.,_.- —III _ ill ,.. N ::...:',.... OH I I I I I I I I ' _,j 71._ ____ . 1.11011 -.■:- Yr.Yr , 1 , • ,.., ,--„, ic R -- 1 I • \-si , I , ',..: • , , (....D , I o o 3=1 ,.... - .: z.., „., _10.1 , ._ (sari M II ■•A•• ---' la. ra. ,AT■N ra. :-., 11111, litiok ,..., --... I ' \ ” -.../ iii -0,-- I III 1 III /'' I Q.1 s 1 8 • .z..7,,, „L....1i c.) ....., (7...) C) E... .,.. .,— r---1 /.. 7.7 I TRANSMITTAL LETTER CHECKLIST WELL NAME ?.CAL/ PTD# c i/0&-f Development Service Exploratory Stratigraphic Test Non-Conventional Well FIELD: ??e'/4 4 4".J POOL: Z 0 4)/,e'//,4,47/De O/G Circle Appropriate Letter/Paragraphs to be Included in Transmittal Letter CHECK ADD-ONS WHAT (OPTIONS) TEXT FOR APPROVAL LETTER APPLIES MULTI LATERAL The permit is for a new wellbore segment of existing well (If last two digits in Permit No. ,API No. 50- - - API number are between 60-69) Production should continue to be reported as a function of the original API number stated above. PILOT HOLE In accordance with 20 AAC 25.005(f), all records, data and logs acquired for the pilot hole must be clearly differentiated in both well name ( PH) and API number (50- - - ) from records, data and logs acquired for well SPACING The permit is approved subject to full compliance with 20 AAC EXCEPTION 25.055. Approval to perforate and produce / inject is contingent upon issuance of a conservation order approving a spacing exception. assumes the liability of any protest to the spacing exception that may occur. DRY DITCH All dry ditch sample sets submitted to the Commission must be in SAMPLE no greater than 30' sample intervals from below the permafrost or from where samples are first caught and 10' sample intervals through target zones. Non-Conventional Please note the following special condition of this permit: Well production or production testing of coal bed methane is not allowed for (name of well) until after (Company Name) has designed and implemented a water well testing program to provide baseline data on water quality and quantity. (Company Name)must contact the Commission to obtain advance approval of such water well testing program. Rev: 1/11/2008 Alaska Department of NaturaOsources Land Administration System, Page 1 of/ Alaska Mapper Land Records/Status Plats Recorder's Search State Cabins Natural Resources Alaska DNR Case Summary File Type: ADL File Number: 28286 Printable Case File Summary See Township, Range, Section and Acreage? New Search Yes 0 No LAS Menu I Case Abstract I Case Detail I Land Abstract File: ADL 28286 Search for Status Plat Updates As of 01/07/2011 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E. BENSON BL ATTN: LAND MANAGER- ALASKA ANCHORAGE AK 995196612 Case Type: 784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status: 35 ISSUED Status Date: 08/19/1965 Total Acres: 2560.000 Date Initiated: 05/28/1965 Office of Primary Responsibility: DOG DIV OIL AND GAS Last Transaction Date: 12/04/2006 Case Subtype: NS NORTH SLOPE Last Transaction: AA-NRB ASSIGNMENT APPROVED Meridian: U Township: 011N Range: 013E Section: 25 Section Acres: 640 Search Plats Meridian: U Township: 011N Range: 013E Section: 26 Section Acres: 640 Meridian: U Township: O11N Range: 013E Section: 35 Section Acres: 640 Meridian: U Township: 011N Range: 013E Section: 36 Section Acres: 640 Legal Description 05-28-1965 ***SALE NOTICE LEGAL DESCRIPTION*** C14-97 T11N-R13E-UM 25,26,35,36 2560.00 End of Case Summary Last updated on 01/07/2011. http://dnr.alaska.gov/projects/las/Case_Summary.cfm?FileType=ADL&FileNumber=28286... 1/7/2011 • • ❑❑ Co cm ° a) a N O O co - 7 Q , m. 4 c =. , cv E.,) as, v, O O 3.° c E cos; a , �, , 0, t,, Q. o , R 4 m, 3, rn. , in o , a, �, - co, , o a co, , �, 0 , � o Z, -oi Q, Psi w 2' ui, ay L , 0 v,; v; w' •�. 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O. co. c6• 4 ax G. C o 3 u) a3 y -' O` �' 2. _ -0, •�. �, a3, C �' f0, c, `. 01 c. Y 7, as @, 7. '5, O. Y, .. QY ii as on v ° o c`Y �. c �. a a. a r, a�i vY a°i as >. m w c, a ° , u,, °, �, ° °. c. �, �. a , 0. E' To. .0.' .O' .N.. as. V' 0 L c, c. N g , 8 @. C. V. ay , a) o EY = O, V, 07 c. N. c 0. @, X as ds, m. 'E, 3' ° o °. _ as as = a;. � '°, �Y' `°' _, c, �. o v' °, o _. w >' .. �, ;' c8 8' a, =. °=. 0 0 0 0 is v_i /a tj v -, o. =. fl �, = m c, ° I' 0 v, c y. 0 0, 0, as. CO• a) 0' 0 3, V, O, O, '3. O) �. 'O. 3. '. Os N' aj 3' W' 43 a m °' m V. E N. 0. U, '>' N N� E', E' C 3. a C' , H H F ._; daj. ,' dc s, 3 °, a• a� O, i .- u , 2, y, C c m m o, a`s, of), c m' To .. =, ° 4 4 as. as CO, as' s' o' °, �; �; as. -0 as "0 'v' _ O O, r, °' O as as as as. as. o 0 cz, 0, -, �, 55' 5, cn ''. pp. a a, U, 5, da; U, (nU, U; U, U, Q _, Q, 27000 m. 0, 3:, N, 2' a, o, cn, cnc). as a. N. N Css et Lo (0 (0 0) O '- N M V cn (0 e- N N N N MI' N N N N N 0 1-• o)9 CMO CCO M M M M M 0 CO 0 N w O . p c N O0 r _ a TA a`) CAE C0 r- 0 N- N c_ L co 0 O cn a In o, u) U co CIE Q Q c Q C9 as Q Q a a su • Well History File APPENDIX Information of detailed nature that is not particularly germane to the Well Permitting Process but is part of the history file. To improve the readability of the Well History file and to simplify finding information, information of this nature is accumulated at the end of the file under APPENDIX. No special effort has been made to chronologically organize this category of info nation. Sperry-Sun Drilling Services 46k"255 LIS Scan Utility 2�t-CCS3 $Revision: 3 $ LisLib $Revision: 4 $ Tue Sep 06 12:11:11 2011 Reel Header Service name LISTPE Date 11/09/06 Origin STS Reel Name UNKNOWN Continuation Number 01 Previous Reel Name UNKNOWN Comments STS LIS Writing Library. Scientific Technical Services Tape Header Service name LISTPE Date 11/09/06 Origin STS Tape Name UNKNOWN Continuation Number 01 Previous Tape Name UNKNOWN Comments STS LIS Writing Library. Scientific Technical Services Physical EOF Comment Record TAPE HEADER Prudhoe Bay Unit MWD/MAD LOGS WELL NAME: A-25B API NUMBER: 500292076402 OPERATOR: BP Exploration (Alaska) , Inc. LOGGING COMPANY: Sperry Drilling TAPE CREATION DATE: 06-SEP-11 JOB DATA MWD RUN 2 MWD RUN 3 MWD RUN 4 JOB NUMBER: -XX-0007760438 -XX-0007760438 -XX-0007760438 LOGGING ENGINEER: BRIAN STEPHE BRIAN STEPHE BRIAN STEPHE OPERATOR WITNESS: DAVE NEWLON DAVE NEWLON DAVE NEWLON SURFACE LOCATION SECTION: 35 TOWNSHIP: 11N RANGE: 13E FNL: 2652 FSL: FEL: 1703 FWL: ELEVATION (FT FROM MSL 0) KELLY BUSHING: DERRICK FLOOR: 90.32 GROUND LEVEL: 51. 98 WELL CASING RECORD OPEN HOLE CASING DRILLERS BIT SIZE (IN) SIZE (IN) DEPTH (FT) 1ST STRING 8.500 9.625 8179.0 2ND STRING 6.125 7.000 10983.0 3RD STRING PRODUCTION STRING REMARKS: 1. ALL DEPTHS ARE MEASURED DEPTH (MD) UNLESS OTHERWISE NOTED. THESE DEPTHS ARE BIT DEPTHS. 2. ALL VERTICAL DEPTHS ARE TRUE VERTICAL DEPTH (TVD) . ONLY INVERT/ REVERT SECTIONS (IF ANY) GREATER THAN 30' TVD ARE PRESENTED. 3. THIS SIDETRACK EXITED A-25 BY MEANS OF A WHIPSTOCK, THE TOP OF WHICH WAS AT 8179'MD/6061'TVD. THE WINDOW WAS MILLED AND ABOUT 20' OF RAT HOLE WERE DRILLED DURING MWD RUN 2. ONLY ROP DATA ARE PRESENTED FOR THIS RUN. 4. MWD RUNS 3, 4 COMPRISED DIRECTIONAL, DUAL GAMMA RAY (DGR) UTIL- IZING GEIGER-MUELLER TUBE DETECTORS, ELECTROMAGNETIC WAVE RESISTIVITY-PHASE 4 (EWR-P4) , AND DRILLSTRING DYNAMICS SENSOR (DDSr) . MWD RUN 3 ALSO INCLUDED PRESSURE WHILE DRILLING (PWD) . MWD RUN 4 ALSO INCLUDED AT-BIT INCLINATION (ABI) , COMPENSATED THERMAL NEUTRON POROSITY (CTN) , AZIMUTHAL LITHO-DENSITY (ALD) , AND BI-MODAL ACOUSTIC TOOL (BAT) . 5. MERGED DIGITAL AND LOG DATA WERE BULK-SHIFTED -11' , PER E-MAIL (30 AUGUST 2011) FROM D. DORTCH (WIPRO/BP) TO BUSTER BRYANT (SD) , QUOTING AUTHORIZATION FROM WALTER TIFENTAL (BP) . THIS SHIFTED MWD LOG IS THE PDCL FOR A-25B. ANNOTATIONS AND LOG HEADER DATA RETAIN ORIGINAL DRILLER'S DEPTHS. 6. MWD RUNS 2-4 REPRESENT WELL A-25B WITH API# 50-029-20764-02. THIS WELL REACHED A TOTAL DEPTH (TD) OF 11, 610'MD/9185'TVD. MNEMONICS CURVE DESCRIPTION ROPA AVERAGE RATE OF PENETRATION DGRC DGR COMBINED GAMMA RAY R09P 9 INCH PHASE RESISTIVITY R15P 15 INCH PHASE RESISTIVITY R27P 27 INCH PHASE RESISTIVITY R39P 39 INCH PHASE RESISTIVITY EWXT EWR FORMATION EXPOSURE TIME TNPS CTN POROSITY - SANDSTONE TNFA CTN FAR AVERAGE COUNT RATE TNNA CTN NEAR AVERAGE COUNT RATE ACDL/ALCDLC ALD LCRB COMPENSATED DENSITY ADCL/ALDCLC ALD LCRB DENSITY CORRECTION APEL/ALPELC ALD LCRB Pe FACTOR AHSI/ALHSI ALD HOLE SIZE INDICATOR ALRP/ALRPM ALD RPM (NON-SLIDE INDICATOR) BTCS BAT COMPRESSIONAL SLOWNESS BCSS BAT COMBINED SHEAR SLOWNESS BVPS BAT VP/VS RATIO BSFG BAT SHEAR FLAG • PARAMETERS USED IN POROSITY LOG PROCESSING: HOLE SIZE: FIXED AT 6.125 INCHES MUD WEIGHT: 8.6 - 8.85 PPG WHOLE MUD CHLORIDES: 900 - 29, 000 PPM FORMATION WATER SALINITY: 11500 PPM CL FLUID DENSITY: 1.0 G/CC MATRIX DENSITY: 2.65 G/CC LITHOLOGY: SANDSTONE ALL DATA CURVES ARE SMOOTHED TO A STEP OF 0.5 FT, WITH A WINDOW OF 0.6 FT, EXCEPT FOR SROP AND SGRC. THESE CURVES ARE SMOOTHED WITH A 1.1 FT WINDOW. GAP FILL IS SET TO 5 FT FOR ALL CURVES. File Header Service name STSLIB.001 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Previous File Name STSLIB.000 Comment Record FILE HEADER FILE NUMBER: 1 EDITED MERGED MWD Depth shifted and clipped curves; all bit runs merged. DEPTH INCREMENT: .5000 FILE SUMMARY PBU TOOL CODE START DEPTH STOP DEPTH GR 8159.0 11527.0 RPX 8163.0 11534 .0 RPD 8163.0 11534.0 RPS 8163.0 11534.0 RPM 8163.0 11534.0 ROP 8168.0 11599.0 FET 8168.5 11534.0 NCNT 10964.0 11499.0 DRHO 10964.0 11514.0 FCNT 10964.0 11499.0 CALN 10964.0 11514.0 PEF 10964.0 11514.0 RHOB 10964.0 11514.0 NPHI 10964.0 11499.0 SCRA 10967.5 11482.0 DTSH 10967.5 11482.0 DTC 10967.5 11482.0 BASELINE CURVE FOR SHIFTS: CURVE SHIFT DATA (MEASURED DEPTH) EQUIVALENT UNSHIFTED DEPTH BASELINE DEPTH GR 8159.0 8170.0 11599.0 11610.0 MERGED DATA SOURCE PBU TOOL CODE BIT RUN NO MERGE TOP MERGE BASE MWD 2 8179.0 8216.0 MWD 3 8216.0 10984.0 MWD 4 10984.0 11610.0 4 • if REMARKS: MERGED MAIN PASS. $ Data Format Specification Record Data Record Type 0 Data Specification Block Type 0 Logging Direction Down Optical log depth units Feet Data Reference Point Undefined Frame Spacing 60 .lIN Max frames per record Undefined Absent value -999 Depth Units Datum Specification Block sub-type. . .0 Name Service Order Units Size Nsam Rep Code Offset Channel DEPT FT 4 1 68 0 1 RHOB MWD G/CC 4 1 68 4 2 DRHO MWD G/CC 4 1 68 8 3 CALN MWD IN 4 1 68 12 4 PEF MWD B/E 4 1 68 16 5 DTSH MWD USPF 4 1 68 20 6 DTC MWD USPF 4 1 68 24 7 SCRA MWD 4 1. 68 28 8 GR MWD API 4 1 68 32 9 FET MWD HR 4 1 68 36 10 RPX MWD OHMM 4 1 68 40 11 RPS MWD OHMM 4 1 68 44 12 RPM MWD OHMM 4 1 68 48 13 RPD MWD OHMM 4 1 68 52 14 ROP MWD FPH 4 1 68 56 15 FCNT MWD CP30 4 1 68 60 16 NCNT MWD CP30 4 1 68 64 17 NPHI MWD PU 4 1 68 68 18 First Last Name Service Unit Min Max Mean Nsam Reading Reading DEPT FT 8159 11599 9879 6881 8159 11599 RHOB MWD G/CC 1.045 3.086 2.36961 1101 10964 11514 DRHO MWD G/CC -1.577 0.869 0.0581526 1101 10964 11514 CALN MWD IN 5.75 9.94 6.18849 1014 10964 11514 PEF MWD B/E 1.14 13.41 2. 60183 1101 10964 11514 DTSH MWD USPF 102.939 171.287 140.477 1030 10967.5 11482 DTC MWD USPF 58.5625 103.022 83.8147 1030 10967.5 11482 SCRA MWD 1.3814 2.1442 1.68547 1030 10967.5 11482 GR MWD API 18.04 490.1 124.868 6737 8159 11527 FET MWD HR 0.37 133.48 2.32995 6643 8168.5 11534 RPX MWD OHMM 0.13 1683.67 4.86526 6653 8163 11534 RPS MWD OHMM 0.18 1685.14 6.16555 6654 8163 11534 RPM MWD OHMM 0.44 2000 11.8153 6654 8163 11534 RPD MWD OHMM 0.49 2000 9.20483 6654 8163 11534 ROP MWD FPH 0.06 711.01 109.339 6863 8168 11599 FCNT MWD CP30 115.39 4271.82 871.414 1071 10964 11499 NCNT MWD CP30 14952. 9 59670.7 33290.7 1071 10964 11499 NPHI MWD PU 4.71 60.78 21. 9907 1071 10964 11499 First Reading For Entire File 8159 Last Reading For Entire File 11599 File Trailer Service name STSLIB.001 Service Sub Level Name Version Number 1 0 0 • Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Next File Name STSLIB.002 Physical EOF File Header Service name STSLIB.002 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Previous File Name STSLIB.001 Comment Record FILE HEADER FILE NUMBER: 2 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NUMBER: 2 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH STOP DEPTH ROPA 8179.0 8216.0 LOG HEADER DATA DATE LOGGED: 23-JUL-11 SOFTWARE SURFACE SOFTWARE VERSION: Insite DOWNHOLE SOFTWARE VERSION: 4.3 DATA TYPE (MEMORY OR REAL-TIME) : Memory TD DRILLER (FT) : 8216.0 TOP LOG INTERVAL (FT) : 8179.0 BOTTOM LOG INTERVAL (FT) : 8216.0 BIT ROTATING SPEED (RPM): HOLE INCLINATION (DEG MINIMUM ANGLE: 49.9 MAXIMUM ANGLE: 49.9 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE TOOL NUMBER BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN) : 8.500 DRILLER'S CASING DEPTH (FT) : 8179.0 BOREHOLE CONDITIONS MUD TYPE: Sea Water MUD DENSITY (LB/G) : 8.50 MUD VISCOSITY (S) : .0 MUD PH: MUD CHLORIDES (PPM) : 0 FLUID LOSS (C3) : .0 RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT) : MUD AT MAX CIRCULATING TERMPERATURE: 120.0 MUD FILTRATE AT MT: MUD CAKE AT MT: NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN) : TOOL STANDOFF (IN) : EWR FREQUENCY (HZ) : REMARKS: Data Format Specification Record Data Record Type 0 Data Specification Block Type 0 Logging Direction Down Optical log depth units Feet Data Reference Point Undefined Frame Spacing 60 .1IN Max frames per record Undefined Absent value -999 Depth Units Datum Specification Block sub-type. . .0 Name Service Order Units Size Nsam Rep Code Offset Channel DEPT FT 4 1 68 0 1 ROP MWD020 FPH 4 1 68 4 2 First Last Name Service Unit Min Max Mean Nsam Reading Reading DEPT FT 8179 8216 8197.5 75 8179 8216 ROP MWD020 FPH 0.06 7.89 4.2612 75 8179 8216 First Reading For Entire File 8179 Last Reading For Entire File 8216 File Trailer Service name STSLIB.002 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Next File Name STSLIB.003 Physical EOF File Header Service name STSLIB.003 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Previous File Name STSLIB.002 Comment Record FILE HEADER FILE NUMBER: 3 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NUMBER: 3 DEPTH INCREMENT: .5000 FILE SUMMARY . . VENDOR TOOL CODE START DEPTH STOP DEPTH DGRC 8170.0 10937.5 R15P 8174 .0 10930.0 R39P 8174.0 10930.0 R27P 8174.0 10930.0 R09P 8174 .0 10930.0 EWXT 8179.5 10930.0 ROPA 8216.5 10984.0 LOG HEADER DATA DATE LOGGED: 27-JUL-11 SOFTWARE SURFACE SOFTWARE VERSION: Insite DOWNHOLE SOFTWARE VERSION: 88.20 DATA TYPE (MEMORY OR REAL-TIME) : Memory TD DRILLER (FT) : 10984.0 TOP LOG INTERVAL (FT) : 8216.0 BOTTOM LOG INTERVAL (FT) : 10984.0 BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG MINIMUM ANGLE: 10.8 MAXIMUM ANGLE: 49.9 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE TOOL NUMBER DGR DUAL GAMMA RAY 269077 EWR4 ELECTROMAG. RESIS. 4 216787 BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN) : 8.500 DRILLER'S CASING DEPTH (FT) : 8179.0 BOREHOLE CONDITIONS MUD TYPE: Polymer MUD DENSITY (LB/G) : 10.00 MUD VISCOSITY (S) : 47.0 MUD PH: 10.6 MUD CHLORIDES (PPM) : 900 FLUID LOSS (C3) : 8.0 RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT) : 1.400 72.0 MUD AT MAX CIRCULATING TERMPERATURE: .640 166.1 MUD FILTRATE AT MT: 1.000 72.0 MUD CAKE AT MT: 1.800 72.0 NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN) : TOOL STANDOFF (IN) : EWR FREQUENCY (HZ) : REMARKS: Data Format Specification Record Data Record Type 0 Data Specification Block Type 0 Logging Direction Down Optical log depth units Feet Data Reference Point Undefined Frame Spacing 60 .1IN Max frames per record Undefined Absent value -999 Depth Units • I Datum Specification Block sub-type. . .0 Name Service Order Units Size Nsam Rep Code Offset Channel DEPT FT 4 1 68 0 1 GR MWD030 API 4 1 68 4 2 FET MWD030 HR 4 1 68 8 3 RPX MWD030 OHMM 4 1 68 12 4 RPS MWD030 OHMM 4 1 68 16 5 RPM MWD030 OHMM 4 1 68 20 6 RPD MWD030 OHMM 4 1 68 24 7 ROP MWD030 FPH 4 1 68 28 8 First Last Name Service Unit Min Max Mean Nsam Reading Reading DEPT FT 8170 10984 9577 5629 8170 10984 GR MWD030 API 47.95 411. 62 139.196 5536 8170 10937.5 FET MWDO30 HR 0.37 62.95 1. 98312 5502 8179.5 10930 RPX MWD030 OHMM 0.47 1683.67 2.71275 5513 8174 10930 RPS MWD030 OHMM 0.47 1685.14 2.70504 5513 8174 10930 RPM MWD030 OHMM 0.44 1911.77 3.71191 5513 8174 10930 RPD MWD030 OHMM 0.49 2000 5.79734 5513 8174 10930 ROP MWD030 FPH 0.19 250.36 113.035 5536 8216.5 10984 First Reading For Entire File 8170 Last Reading For Entire File 10984 File Trailer Service name STSLIB.003 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Next File Name STSLIB.004 Physical EOF File Header Service name STSLIB.004 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Previous File Name STSLIB.003 Comment Record FILE HEADER FILE NUMBER: 4 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NUMBER: 4 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH STOP DEPTH DGRC 10938.0 11538.0 R39P 10975.0 11545.0 ADCL 10975.0 11525.0 TNNA 10975.0 11510.0 AHSI 10975.0 11525.0 TNFA 10975.0 11510.0 410 411 APEL 10975.0 11525.0 TNPS 10975.0 11510.0 R09P 10975.0 11545.0 R27P 10975.0 11545.0 R15P 10975.0 11545.0 EWXT 10975.0 11545.0 ACDL 10975.0 11525.0 BTCS 10978.5 11493.0 BVPS 10978.5 11493.0 BCSS 10978.5 11493.0 ROPA 10984 .5 11610.0 LOG HEADER DATA DATE LOGGED: 02-AUG-11 SOFTWARE SURFACE SOFTWARE VERSION: Insite DOWNHOLE SOFTWARE VERSION: 88.20 DATA TYPE (MEMORY OR REAL-TIME) : Memory TD DRILLER (FT) : 11610.0 TOP LOG INTERVAL (FT) : 10984.0 BOTTOM LOG INTERVAL (FT) : 11610.0 BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG MINIMUM ANGLE: 10.5 MAXIMUM ANGLE: 13.3 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE TOOL NUMBER DGR DUAL GAMMA RAY 11279026 CTN COMP THERMAL NEUTRON 249647 BAT Bi-modal Acoustic 11480537 EWR4 Electromag Resis. 4 11274400 ALD Azimuthal Litho-Dens 249341 BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN) : 6.125 DRILLER'S CASING DEPTH (FT) : 10983.0 BOREHOLE CONDITIONS MUD TYPE: Polymer MUD DENSITY (LB/G) : 8.70 MUD VISCOSITY (S) : 47.0 MUD PH: 9.5 MUD CHLORIDES (PPM) : 29000 FLUID LOSS (C3) : 6.0 RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT) : .100 70.0 MUD AT MAX CIRCULATING TERMPERATURE: .040 178.0 MUD FILTRATE AT MT: .090 70.0 MUD CAKE AT MT: .110 70.0 NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN) : TOOL STANDOFF (IN) : EWR FREQUENCY (HZ) : REMARKS: Data Format Specification Record Data Record Type 0 Data Specification Block Type 0 Logging Direction Down , III III Optical log depth units Feet Data Reference Point Undefined Frame Spacing 60 . 1IN Max frames per record Undefined Absent value -999 Depth Units Datum Specification Block sub-type. . .0 Name Service Order Units Size Nsam Rep Code Offset Channel DEPT FT 4 1 68 0 1 RHOB MWD040 G/CC 4 1 68 4 2 DRHO MWD040 G/CC 4 1 68 8 3 CALN MWD040 IN 4 1 68 12 4 PEF MWD040 B/E 4 1 68 16 5 DTSH MWD040 USPF 4 1 68 20 6 DTC MWD040 USPF 4 1 68 24 7 SCRA MWD040 4 1 68 28 8 GR MWD040 API 4 1 68 32 9 FET MWD040 HR 4 1 68 36 10 RPX MWD040 OHMM 4 1 68 40 11 RPS MWD040 OHMM 4 1 68 44 12 RPM MWD040 OHMM 4 1 68 48 13 RPD MWD040 OHMM 4 1 68 52 14 ROP MWD040 FPH 4 1 68 56 15 FCNT MWD040 CP30 4 1 68 60 16 NCNT MWD040 CP30 4 1 68 64 17 NPHI MWD040 PU 4 1 68 68 18 First Last Name Service Unit Min Max Mean Nsam Reading Reading DEPT FT 10938 11610 11274 1345 10938 11610 RHOB MWD040 G/CC 1.045 3.086 2.36961 1101 10975 11525 DRHO MWD040 G/CC -1.577 0.869 0.0581526 1101 10975 11525 CALN MWD040 IN 5.75 9.94 6.18849 1014 10975 11525 PEF MWD040 B/E 1.14 13.41 2.60183 1101 10975 11525 DTSH MWD040 USPF 102.939 171.287 140.477 1030 10978.5 11493 DTC MWD040 USPF 58.5625 103.022 83.8147 1030 10978.5 11493 SCRA MWD040 1.3814 2.1442 1.68547 1030 10978.5 11493 GR MWD040 API 18.04 490.1 58.8221 1201 10938 11538 FET MWD040 HR 0.54 133.48 4.00245 1141 10975 11545 RPX MWD040 OHMM 0.13 1158.12 15.2642 1141 10975 11545 RPS MWD040 OHMM 0.18 1211.54 22.8858 1141 10975 11545 RPM MWD040 OHMM 1.04 2000 50. 9687 1141 10975 11545 RPD MWD040 OHMM 0.76 1583.08 25.6689 1141 10975 11545 ROP MWD040 FPH 1.41 711.01 99.291 1252 10984.5 11610 FCNT MWD040 CP30 115.39 4271.82 871.414 1071 10975 11510 NCNT MWD040 CP30 14952.9 59670.7 33290.7 1071 10975 11510 } NPHI MWD040 PU 4.71 60.78 21. 9907 1071 10975 11510 First Reading For Entire File 10938 Last Reading For Entire File 11610 File Trailer Service name STSLIB.004 Service Sub Level Name Version Number 1 0 0 Date of Generation 11/09/06 Maximum Physical Record65535 File Type LO Next File Name STSLIB.005 Physical EOF • S Tape Trailer Service name LISTPE Date 11/09/06 Origin STS Tape Name UNKNOWN Continuation Number 01 Next Tape Name UNKNOWN Comments STS LIS Writing Library. Scientific Technical Services Reel Trailer Service name LISTPE Date 11/09/06 Origin STS Reel Name UNKNOWN Continuation Number 01 Next Reel Name UNKNOWN Comments STS LIS Writing Library. Scientific Technical Services Physical EOF Physical EOF End Of LIS File