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209-085
DATA SUBMITTAL COMPLIANCE REPORT 8/14/2012 Permit to Drill 2090850 Well Name /No. PRUDHOE BAY UNIT C -12B Operator BP EXPLORATION (ALASKA) INC API No. 50- 029 - 20387 -02 -00 MD 13004 TVD 9028 Completion Date 9/20/2009 Completion Status 1 -OIL Current Status P &A UIC N REQUIRED INFORMATION Mud Log No Samples No Directional S ey Yes .....).....„,.."" DATA INFORMATION Types Electric or Other Logs Run: MWD DIR, GR, RES, GR / CCL / CNL (data taken from Logs Portion of Master Well Data Maint Well Log Information: Log/ Electr 1111 Data Digital Dataset Log Log Run Interval OH / Type Med /Frmt Number Name Scale Media No Start Stop CH Received Comments Log ai Neutron 25 Blu 10168 12948 Case 11/6/2009 MCNL, Mem Lee, CCL, GR, TNF, TNN 19 -Sep- !.. 2009 ED C Lis 18912 Neutron 10167 12962 Case 11/6/2009 CH GR, CNT Data Plus PDS Graphics Rpt * ...- LIS Verification 11158 13001 Open 12/16/2009 i 1 ED -,.-'C Lis 19127 Induction /Resistivity 11158 13001 Open 12/16/2009 OH LIS GR, ROP, RPS, RPM, RPD, RAD data Plus CGM & PDF Graphics Log U. Induction /Resistivity 25 Col 11375 13004 Open 12/18/2009 MD MPR, GR Log J Induction /Resistivity 5 Col 11375 13004 Open 12/18/2009 TVD MPR, GR Log / Gamma Ray 25 Col 11375 13004 Open 12/18/2009 MD GR Log Gamma Ray 5 Col 1114 13010 Open 12/18/2009 MD Depth Shift Monitor Plot 1 EDAsc Directional Survey 11300 13004 Open III Rpt Directional Survey 11300 13004 Open Log ,/ Production 5 Blu 11920 12890 Case 5/4/2011 Mem PPL w /Ghost, PSP, GR, CCL, Pres, Temp, Spin, XY Cali ED,f° "'C Pds 20959 Production 11920 12890 Case 5/4/2011 Mem PPLw /Ghost, PSP, GR, CCL, Pres, Temp, Spin, XY Cali ' Log r . 21018 Casing collar locator 5 15 11835 Case 11/20/2011 MD Primary Depth Control Log ED - Pds 21018 Casing collar locator 15 11835 Case 11/20/2011 Primary Depth Control Log Loge- Cement Evaluation 5 10350 11825 Case 11/20/2011 MD Cement Mapping Tool ED- C Pds 21028 Cement Evaluation 10350 11825 Case 11/20/2011 Slim Cement Mapping Tool DATA SUBMITTAL COMPLIANCE REPORT 8/14/2012 Permit to Drill 2090850 Well Name /No. PRUDHOE BAY UNIT C -12B Operator BP EXPLORATION (ALASKA) INC API No. 50- 029 - 20387 -02 -00 MD 13004 TVD 9028 Completion Date 9/20/2009 Completion Status 1 -OIL Current Status P &A UIC N Log ° 21238 Neutron 2 11110 12909 Case 8/1/2011 MD Memory Compensated Neutron Log w/ Borax Memory LEE CCL/GRJTNF/TNN ED 7C Lis 21238 Neutron 11104 12914 Case 8/1/2011 CH LIS LDWG MCNL data Plus PDS Graphics Rpt Directional Survey 100 11841 Open 11/15/2011 Survey Report ED —C Las 21290 Casing collar locator 220 11864 Case 11/15/2011 CCL las plus Survey Report (DOCX & PDF) Well Cores /Samples Information: Sample Interval Set Name Start Stop Sent Received Number Comments ADDITIONAL INFORMATION Well Cored? Y D Daily History Received? Chips Received? Y N Formation Tops � Analysis Received? Comments: • -- Compliance Reviewed By: Date: �` t 1--, RECEIVED • • STATE OF ALASKA MAY 3 0 2012 ALASKA OIL AND GAS CONSERVATION COMMISSION AOGCC WELL COMPLETION OR RECOMPLETION REPORT AND LOG v 1 a. Well Status: ❑ Oil ❑ Gas ❑ SPLUG ❑ Other ® Abandoned ' ❑ Suspended lb. Well Class: 2OAAC 25.105 2OAAC 25.110 Development ' ❑ Exploratory ❑ GINJ ❑ WINJ ❑ WAG ❑ WDSPL ❑ Other No. of Completions Zero ❑ Service ❑ Stratigraphic 2. Operator Name: 5. Date Comp., Susp., or Aband.: 12. Permit to Drill Number: BP Exploration (Alaska) Inc. 5/9/2012 ' 209 - 085 • 312 - 069 3. Address: 6. Date Spudded: 13. API Number: P.O. Box 196612, Anchorage, Alaska 99519 - 6612 9/13/2009 50 029 - 20387 - 02 - 00 • 4a. Location of Well (Governmental Section): 7. Date T.D. Reached: 14. Well Name and Number: Surface: 9/16/2009 PBU C -12B • 555' FNL, 1221' FEL, SEC. 19, T11 N, R14E, UM • 8. KB (ft above MSL): 62.94' • 15. Field / Pool(s): Top of Productive Horizon: 4710' FNL, 3543' FWL, SEC. 20, T11 N, R14E, UM GL (ft above MSL): 32.74' • Prudhoe Bay Field / Prudhoe Bay • Total Depth: 9. Plug Back Depth (MD +TVD): Oil Pool 4098' FNL, 2501' FWL, SEC. 20, T11 N, R14E, UM 11475' 8682' 4b. Location of Well (State Base Plane Coordinates, NAD 27): 10. Total Depth (MD +TVD): 16. Property Designation: Surface: x - 664139 ' y 5960659 ' Zone ASP4 • 13004' 9018' • ADL 028305 TPI: x- 669007 y- 5956611 Zone- ASP4 11. SSSV Depth (MD +TVD): 17. Land Use Permit: Total Depth: x- 667950 Y 5957200 Zone- ASP4 None 18. Directional Survey: ❑ Yes IN No 19. Water depth, if offshore: 20. Thickness of Permafrost (TVD): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1900' (Approx.) 21. Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): 22. Re -Drill /Lateral Top Window MD/TVD: MWD DIR, GR, RES, GR / CCL / CNL 11381' 8604' 23. CASING, LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT CASING WT. PER FT. GRADE ToP BOTTOM TOP BOTTOM SIZE CEMENTING RECORD PULLED 20" x 30" Insulated Conductor Surface 110' Surface 110' 36" 12.9 cu vds Permafrost Concrete 13 -3/8" 72# L -80 Surface 2681' Surface 2662' 17 -1/2" 343 cu ft Arcticset 9 -5/8" 47# L -80 Surface 10957' Surface 8291' 12 -1/4" 1673 cu if Class 'G', 130 cu ft Arcticset 7" 29# L -80 ' 10402' 11381' 7875' 8604' 8 -1/2" 600 cu ft Class 'G' 3 - 1/2" x 3 - 3/16" 9.2# / 6.2# L -80 10344' 13004' 7829' 9028' 4 -1/4" 129 cu ft Class 'G' x 2 -7/8" / 6.16# 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): 7 ", 26# x 4-1/2", 12.6#, L -80 10438' 10298' / 7793' MD TVD MD TVD 26. ACID, FRACTURE, CEMENT SQUEEZE, ETC. DEPTH INTERVAL (MD)) AMOUNT AND KIND OF MATERIAL USED 11948' CIBP 11700' HES CIBP 11625' Set Whipstock 11475' Set Second Whipstock 27. PRODUCTION TEST Date First Production: Method of Operation (Flowing, Gas Lift, etc.): Not on Production N/A Date of Test: Hours Tested: Production For OIL -BBL: GAS -MCF: WATER -BBL: CHOKE SIZE: GAS -OIL RATIO: Test Period 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 ® 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 AAC 250.071. None RBDMS MAY 31 2012 g E)14 vi_c i i 7-- Form 10-407 Revised 12/2009 S ubmit Ori inarOnl CONTINUED ON REVERSE , �/��� 9 Y/;' i ', 29. GEOLOGIC MARKERS (List all formations and markers encountered): 30. FORMATION TESTS NAME MD TVD 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. Zone 3 11508' 8717' None Zone 2C 11594' 8800' Zone 2Bu 11645' 8847' Zone 2BI 11714' 8904' Zone 2A 11816' 8962' Formation at Total Depth (Name): 31. List of Attachments: Summary of Pre -Rig Work, Summary of Daily Drilling Reports, Well Schematic Diagram 32. I hereby certify that the foregoing is . . orrect to the best of my knowledge. ) Signed: Joe Lastufka Title: Drilling Technologist Date: 5/ PBU C -12 209 -085 312 -069 Prepared By Name/Number. Joe Lastufka, 564 -4091 Well Number Permit No. / Approval No. Drilling Engineer: Troy Jakabsky, 564 -4868 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 TVD 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 • . C -12B, Well History (Pre Rig Sidetrack) Date Summary 03/26/12 T /I /O =SSV /450/0, Temp =SI. PPPOT -T (PASS), pre CTD. PPPOT -T: Stung into test port (400 psi), bled void to 0 psi. Pumped through void, good returns. Pressured void to 5000 psi for 30 min test, lost 150 psi in 15 min, lost 0 psi in second 15 min (PASS). Bled void to 0 psi. Functioned LDS (standard) all moved freely (2.5 "). 03/27/12 (pre -ctd) RAN 2.70" DRIFT TO 11800' SLM, NO RESTRICTIONS (past target depth, did not sit down or deviate out). RAN 2.70" x 20' DUMMY WHIPSTOCK TO 11381' SLM, UNABLE TO PASS * *dog leg * *. RAN 2.625" x 20' DUMMY WHIPSTOCK TO 11397' SLM, UNABLE TO PASS. RAN 2.70" x 10' DUMMY WHIPSTOCK TO 11378' SLM, UNABLE TO PASS. 03/29/12 T /I /0= 100/400/35 Temp= S/I Mit IA to 2000 psi (PASSED) Mit OA to 2000 psi (PASSED) Obj: CTD prep. Pumped 3 bbls 60 *F crude down IA to reach test pressure. 1st 15 min lost 32 psi. 2nd 15 min lost 8 psi for a total loss of 40 psi in 30 min. Bled IAP, -2.5 bbls. Rigged down off IA. Rigged up to OA. Pumped 1 bbls 60* crude down OA to reach test pressure. 2nd Attempt: 1st 15 min lost 136 psi. 2nd 15 min lost 32 psi for a total loss of 168 psi in 30 min. Bled OAP,- 1 bbl. Tags hung. Valve positions upon departure= SV • WV SSV = closed. MV IA OA= open. DSO notified. FWHPS= 100/328/0 04/15/12 CTU #9 w / 1.75" ct: Job objective dummy whipstcok drift. MIRU. Function test BOP'S. RIH w / dummy whipstock max OD 2.63" x 27.33'. Clean drift to 11750' CTM no bobbles.POOH / RDMO. 04/16/12 T /I /0= 50/400/120 Upon arrival, conducted PJSM. Opened all tree valves to tree cap for tubing pressure. Pressure tested Swab, Master & Wing. Failed. SEE LOG FOR DETAILS. 04/27/12 TIO = 27/400/0 temp =S /I Assist E -line MIT -T to 1000 psi ** *PASS * ** Pumped 5 bibls neat methanol followed by 16 bbls amb diesel down TBG to achieve 1000 psi MIT -T test pressure. TBG lost 28 psi in the 1st 15 minutes and 18 psi in the 2nd 15 minutes for a total loss of 46 psi over the 30 minute test. FWHP = x)odxxx/xxx E -Line still in control of well upon departure. Notified pad op of well status. S/W /SSV /M = E- Line. IA/OA = 0. 04/27/12 (SLB E -LINE - SET HES CIBP). INITIAL T /I /0 = 25/400/100 PSI. RIH TO SET 3- 3/16" HES CIBP 11700'. TIE IN USING: SLB MEMORY LEE CCL/GR/TNF/TNN DATED 19 SEPTEMBER 2009. -o SET 3 -3/16 HES CIBP AT 11700 LRS PERFORMED MIT -T TO 1000 PSI - PASSED, RDMO e i P FINAL 1 /I /O = 500/400/100 PSI. 12-t 04/29/12 T /I /0 250/500/100 Set CIW 6" TWC #408 tagged at 125" (Pre tree change.) ii 04/30/12 T /I /0 = 250/500/100 Pulled CIW 6x7 tree asse and replaced it with a new 6x7 CIW mod FLS with a baker C actuator. PT connections to 270 psi for 5 min (PASS) High PT to 5k psi for 5 min (PASS). Pulled CIW 6" J plug. PT tree cap to 500 psi for 5 min (PASS). 05/03/12 T /I /0 = 40/50/20. Temp = SI. Bleed WHPs to 0 psi. (Pre CTD). Flowline, AL & WH removed. TBG FL Q surface. IA FL near surface. OA FL © surface. Bled OAP from 20 psi to 0+ psi in 30 min. Bled IAP from 50 psi to 0+ psi in 3 hrs (FTS, 20 gals). Bled tubing pressure from 40 psi to 0+ psi in 30 min. Monitored for 30 min. TP increased 4 psi, IAP increased 4 psi & OAP increased 4 psi. Job complete. Final WHPs = 4/4/4. SV, WV = C. SSV, MV = 0. IA, OA = OTG. NOVP. 1400. 05/04/12 T /I /0 = 6/14/7. Temp = SI. Bleed WHPs to 0 psi ( Pre CTD ). TP increased 2 psi, IAP increased 10 psi, OAP increased 3 psi overnight. SV, WV = C. SSV, MV = 0. IA, OA = OTG. NOVP. 0900. Page 1 of 2 . • C -12B, Well History (Pre Rig Sidetrack) Date Summary 05/04/12 T /I /O= 27/0/0 Conducted PJSM; P.T. (charted) SSV (barrier) to 300 psi /3500 Psi (passed) before removing tree cap, SSV & MN used as barriers; Installed Lubricator & P.T. (charted) against SSV to 300 psi /3500 psi (passed); Set 6" CIW "J" TWC #423 C4) 108" w/1 -2' ext.; P.T. (charted) TWC /tree shell to 300 psi /3500 psi & 5000 psi (passed); Bench marked all tree flange nuts /studs; Note: Tree was recently installed & torqued in shop, all P.T. were downloaded into U -drive TRP folder; Pre Nordic 1. Page 2 of 2 • • North America - ALASKA - BP Page 1 et* Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148 °40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 5/6/2012 00:00 - 02:15 2.25 MOB P PRE PJSM ON PICKING UP NEW REEL. PICK UP NEW REEL INTO PLACE. SECURE ON PINS. SECURE REEL HOUSE DOORS, ALL SECURITY CHAINS ON REEL. AAR ON PICKING UP REEL. WARM UP MOVING SYSTEM. GREASE CHOKE MANIFOLD, REEL HOUSE IRON. 02:15 - 03:30 1.25 MOB P PRE NORDIC SUPERINTENDENT ON LOCATION. INSPECT AROUND RIG IN PREPARATION FOR MOVE. HOLD PRE -RIG MOVE SAFETY MEETING WITH RIG CREW, NORDIC FIELD SUPT, TOOLPUSHER, AND WSL. DISCUSS OBSTACLES ON PAD, POSITION OF EQUIPMENT, PLANNED ROUTE, E -STOP FUNCTION, STOP SIGNALS, CLEAR & CONCISE RADIO COMMUNICATION, AND SPOTTER POSITION. 03:30 - 05:00 1.50 MOB P PRE PULL OFF C -02. MOVE RIG TO C-12. SPOT RIG IN FRONT OF C -12 WHILE RIG MATS AND CELLAR BOARDS ARE BROUGHT OVER. POSITION MATS. CONFIRMED TWC INSTALLED, ALL VALVES CLOSED, 0 PSI ON TUBING AND ANNULUS. PULL OVER C-12. ACCEPT RIG AT 0500 HRS. 05:00 - 07:00 2.00 MOB P PRE SPOT CUTTINGS BOX, TIGER TANK. POSITION EQUIPMENT. PREP FOR OPERATIONS. 07:00 - 09:00 2.00 MOB P PRE CONTINUE RU TEST GAS ALARMS 09:00 - 09:30 0.50 MOB P PRE PRESSURE TEST THE SWAB CAP AS PER ADWOP TO 3500 PSI BEFORE REMOVING THE TREE CAP 09:30 - 11:30 2.00 MOB P PRE SUSPEND OPERATIONS, CREWS ARE RIGGING UP TO TIE IN C-02A OUR LAST WELL AND THEY NEED THE HANDOVER FROM US BEFORE THEY CAN START WORK. 11:30 - 12:20 0.83 MOB P PRE REMOVE TREE CAP AND NU BOPE 12:20 - 14:00 1.67 MOB P PRE NOTIFY STATE INSPECTOR AS REQUESTED FOR 2 HOUR NOTICE FOR OF BOP TEST. INSPECTOR WAIVED WITNESS BUT STATED HE MAY DROP BY IF HE CAN COMPLETE OTHER TESTING. 14:00 - 14:45 0.75 MOB P PRE BOPE RU, INSTALL TUB IN RIG FLOORAND MU LUBRICATOR 14:45 - 15:00 0.25 MOB P PRE HOLD PJSM TO DISABLE THE CHECK VALVE IN THE KILL LINE AND FUNCTION TEST THE BOPE FROM THE OPS CAB 15:00 - 16:45 1.75 BOPSUR P PROD1 FUNCTION TEST BOPE FROM THE OPS CAB THEN USE THE RIG FLOOR CONTROL PANEL FOR THE TEST 16:45 - 17:45 1.00 BOPSUR P PROD1 SHELL TEST Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 26 Nor Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316"W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 17:45 - 18:05 0.33 BOPSUR P PROD1 ** *RIG EVACUATION DRILL * ** GOOD DRILL ALL RIG PERSONNEL AND TRUCK DRIVERS REPORTED TO THE MUSTER AREA IN —4 MIN. ALARMS WERE LOUD ENOUGH FOR EVERYONE ON LOCATION TO HEAR THEM AND NO DEFICIENCIES TO REPORT 18:05 - 00:00 5.92 BOPSUR P ■- PROD1 TESTING BO TO PSI LOW, 350E PSI HIGH. IGH. TEST WITNESSED ED BY TP DAVE HYLER ANDTNSL ROB O'NEAL. 5/7/2012 00:00 - 01:00 1.00 BOPSUR P PROD1 TEST BOP. TEST FLOOR SAFETY VALVE AND 2 -3/8" SAFETY JOINT. TEST WITNESSED BY TP DAVE HYLER AND WSL ROB O'NEAL. 01:00 - 01:30 0.50 BOPSUR P PROD1 CLEAR AND CLEAN RIG FLOOR OF TEST ■- EQUIPMENT. PREPARE TO PULL COIL ACROSS. 01:30 - 03:30 2.00 BOPSUR P PROD1 PULL COIL ACROSS. STAB THROUGH INJECTOR. 03:30 - 03:45 0.25 BOPSUR P PROD1 CONDUCT RIG EVACUATION DRILL. CREW RESPONSE TIME FOR ASSEMBLING TO MUSTER AREA 1 MIN 44 SEC. NOTIFY PAD OPERATOR, CONDUCT AAR DISCUSSING CONTACTS AND FURTHER ACTIONS. 03:45 - 06:00 2.25 BOPSUR P PROD1 STAB ON WITH INJECTOR. CHANGE OUT BRASS IN STUFFING BOX. POP OFF TO INSPECT BOOT ON E -LINE; RE -BOOT E -LINE. STAB BACK ON AND FILL COIL. LOOK FOR ANY LEAKS ON INNER REEL IRON, NO LEAKS. COMPLETE FILLING COIL. PT QUICK TEST SUB. 06:00 - 06:30 0.50 BOPSUR P PROD1 CREW CHANGE 06:30 - 06:55 0.42 BOPSUR P ■- PROD1 A PT NEW HARDLINE, SLACK AND ND TEST T THE INNER REEEL L VALVE ALVE AND PACK -OFFS 06:55 - 07:30 0.58 BOPSUR P PROD1 PT REEL HARDLINE, GOOD TEST PT INNER REEL VALVE AND PACK OFFS TO 250 LOW AND 3500 HIGH (CHARTED TEST) GOOD LOW AND HIGH TESTS 07:30 - 08:00 0.50 BOPSUR P PROD1 PUMP SLACK INTO REEL 08:00 - 08:15 0.25 BOPSUR P PROD1 PU INJECTOR AND MU THE CT CUTTER 08:15 - 09:00 0.75 BOPSUR P ■- PROD1 CUT WHICH IS 2% SLACK AND WIRE, M MU CTC TC AND NOZZLE TO PUMP SLACK FORWARD 09:00 - 09:45 0.75 BOPSUR P PROD1 NOZZLE MADE UP, PUMP SLACK FORWARD 09:45 - 10:00 0.25 BOPSUR P -_ PROD1 BLOW COIL BACK WITH AIR AND PU TO CHECK FOR WIRE 10:00 - 12:00 2.00 BOPSUR P PROD1 WE HAVE WIRE MEG TEST WIRE, GOOD TEST MAKE UP BTT CTC AND PULL TEST CTC TO 30K, GOOD TEST MAKE UP BHI UQC, TEST UQC ELINE CONNECTION, GOOD TEST MU TEST PLATE TO PT BHI UQC CHECK VALVES, GOOD TEST 12:00 - 12:40 0.67 BOPSUR P PROD1 STAB ON AND PUMP SLACK FORWARD Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 3 °l>t • Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °1755.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:40 - 13:10 0.50 BOPSUR P PROD1 SLACK PUMPED FORWARD, REMOVE INJECTOR FROM THE WELL AND PREP FLOOR FOR VALVE CREW TO PULL TWC 13:10 - 13:30 0.33 BOPSUR P PROD1 PJSM FOR BRINGING VALVE CREW EQUIPMENT ON THE RIG AND PULLING THE TWC 13:30 - 13:45 0.25 BOPSUR P PROD1 LOAD EQUIPMENT ON RIG TO PULL TWC 13:45 - 15:10 1.42 BOPSUR P PROD1 CPAI AUDITORS ARE ON LOCATION AND WOULD LIKE TO DO A WALK THROUGH ON THE RIG. SUSPEND OPERATIONS FOR AUDIT 15:10 - 15:30 0.33 BOPSUR P PROD1 HOLD PJSM WITH NEW NORDIC CREW SWITCHING TO DAYS AND THE VALVE CREW TO PULL THE TWC 15:30 - 16:35 1.08 BOPSUR P PROD1 LOAD VALVE CREW EQUIPMENT ON THE RIG 16:35 - 17:00 0.42 BOPSUR P PROD1 PT LUBRICATOR 17:00 - 17:25 0.42 BOPSUR P PROD1 GOOD PT, OPEN SSV AND MASTER TO A CLOSED CHOKE, NO PRESSURE ABOVE TWC 17:25 - 18:00 0.58 BOPSUR P PROD1 EQUALIZED THE TWC AND WE HAVE A LITTLE PRESSURE UNDER THE VALVE 20 PSI CLOSE MASTER AND PT 18:00 - 18:30 0.50 BOPSUR N SFAL PROD1 WHILE PRESSURE TESTING THE MASTER VALVE, THE HYDRAULIC LINE ON THE VALVE LUBRICATOR PARTED. NOT SURE WHY IT HAPPENED BECAUSE WE HAD JUST PERFORMED THE SAME TEST EARLIER. VERY LITTLE HYDRAULIC FLUID IN LINE LEAKED OUT ON SIDE OF LUBRICATOR. COVER WITH ABSORB AND CONTACT LEADERSHIP. WELLS GROUP ENGINEER WANTED CONFIRMATION THAT ROD WAS FULLY STROKED. CONFIRMATION GIVEN, PERMISSION GIVEN TO CONTINUE WITH OPS. 18:30 - 21:00 2.50 BOPSUR N SFAL PROD1 IN ATTEMPT TO CLOSE SSV, CANNOT FULLY CYCLE IT CLOSED. MAKE SEVERAL ATTEMPTS. CONTACT WELLS GROUP ENGINEER AND FIELD SUPERINTENDENT. BARRIERS IN PLACE ARE CAST IRON BRIDGE PLUG (CIBP) AND TESTED MASTER VALVE. CONDUCT LEAK TIGHT / FLOW TEST TO ENSURE MASTER VALVE GOOD BY OPENING UP THROUGH CHOKE; NO FLOW AND NO PRESSURE. MAKE SEVERAL ATTEMPTS TO CYCLE SSV, CANNOT FULLY CLOSE. CALL SUPERINTENDENT AND WELLS GROUP ENGINEER. DECISION IS TO PULL LUBRICATOR. PULL LUBRICATOR, PIN TO ROD EXTENSION HAS SHEARED, LEAVING EXTENSION RODS AND TWC IN HOLE ON TOP OF MASTER. FISHING NECK LOOKING UP AT —6' BELOW RIG FLOOR. 21:00 - 21:30 0.50 BOPSUR N SFAL PROD1 MAKE NOTIFICATIONS TO WELLS GROUP, BP SUPERINTENDENT AND NORDIC SUPERINTENDENT. DEVELOP PLAN FORWARD TO PULL ASSEMBLY. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 4 city Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 0 1755.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 21:30 - 22:45 1.25 BOPSUR N SFAL PROD1 LOOP SLING AROUND FISHING NECK, PULL TO SURFACE WITH TUGGER. LOOP SECOND SLING AROUND EXTENSION ROD. PULL TO RIG FLOOR. BREAK DOWN EXTENSION ASSEMBLY. INSPECT TWC AND EXTENSION RODS, NO DAMAGE. —3" OF RUBBER SEAL MISSING ON TWC. 5/8" METAL PIN FOR EXTENSION ROD CONNECTIONS SHEARED ON BOTH SIDES. PJSM ON LAYING DOWN LUBRICATOR AND TWC. MOBILIZE OFF OF RIG. SEND BAKER HAND BACK TO SHOP FOR MAGNET. 22:45 - 23:30 0.75 BOPSUR N SFAL PROD1 SUCK STACK DRY TO INSPECT MASTER, SWAB, LOOK FOR DEBRIS ON TOP OF VALVES. SOME NOTICEABLE DEBRIS ON MASTER. FUNCTION SSV, FULL FUNCTION TO CLOSE AND OPENED POSITION. NO VISUAL DAMAGE. 23:30 - 00:00 0.50 BOPSUR N SFAL PROD1 WAIT ON MAGNET 5/8/2012 00:00 - 01:30 1.50 BOPSUR N SFAL PROD1 FISH FOR METAL DEBRIS WITH MAGNET. FOUND ONE PIECE APPROXIMATELY 3/8" IN LENGTH. CONFIRMED WITH VALVE SHOP THAT THERE ARE SUPPOSED TO BE TWO SHEARS. USE MAGNET ON THREE MORE RUNS WITH NO DEBRIS RETRIEVED. 01:30 - 02:30 1.00 BOPSUR N SFAL PROD1 MU NOZZLE ASSEMBLY AND JET STACK FROM MASTER UP TO TOP AT 3.6 BPM. MAGNETS ARE IN FLOW RETURN DITCH AND SCREEN ON OUTLET. KILL LINE SHUT IN. MAKE TWO MORE PASSES TO MASTER VALVE AND BACK UP. INSPECT FLOW RETURN LINE; PLENTY OF IRON SHAVINGS AND THE 3" PIECE OF SEAL RUBBER FROM TWC RETRIEVED. MAKE ONE MORE PASS AT .5 BPM DOWN AND 3.5 BPM COMING UP. MAKE ONE LAST PASS AT .25 BPM DOWN AND WITH NO PUMPS COMING UP. NO DEBRIS IN FLOW RETURN, ON MAGNETS, OR IN BASKET STRAINER. POP OFF WITH INJECTOR. 02:30 - 03:00 0.50 BOPSUR N SFAL PROD1 RUN BACK IN HOLE WITH MAGNET ASSEMBLY TWO TIMES. NO DEBRIS ON MAGNET. LD BHA. 03:00 - 03:45 0.75 BOPSUR N SFAL PROD1 CLEAR AND CLEAN RIG FLOOR. CONSULT WITH FIELD SUPERINTENDENT AND TOWN ON PLAN FORWARD. DECIDE TO PROCEED WITH RUNNING WHIPSTOCK. 03:45 - 05:00 1.25 BOPSUR N SFAL PROD1 INSTALL NIGHT CAP. FILL TREE WITH METHANOL. PT AGAINST MASTER AND THEN SWAB TO 250 PSI LOW AND 3500 PSI HIGH. OPEN TO WELL, NO PRESSURE ON WELL. PUMP ACROSS TOP, FULL RETURNS IMMEDIATELY. PUMP ACROSS TOP WITH NO LOSSES. 05:00 - 05:45 0.75 EVAL N SFAL PROD1 PULL NIGHTCAP. MOVE INJECTOR OVER WELL. MU NOZZLE ASSEMBLY TO COIL CONNECTOR FOR DEDICATED RIH TO JET WELLBORE AND DISPLACE FREEZE PROTECT. STAB ON, PRESSURE TEST QTS. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 5 Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations ate p (hr) (ft) 05:45 - 06:25 0.67 EVAL N SFAL PROD1 RIH TAKING ALL RETURNS TO THE TIGER TANK HOLDING 100 -200 PSI BACK PRESSURE WHILE PUMPING CLEAN KCL AT 1.6 BPM 06:25 - 07:30 1.08 EVAL N SFAL PROD1 GETTING GAS BACK, NOTIFY PAD OP & BP RADIO TO RESTRICT ACCESS TO THE PAD. WHILE TAKING ALL RETURNS TO THE TIGER TANK, WE NEED TO STRAP THE TANK EVERY 1000' AND TO DO THIS WE WILL NEED TO SHUT THE WELL IN SO THE RIG HAND CAN GO VP ON THE TANK AND STRAP IT. 07:30 - 07:40 0.17 EVAL N SFAL PROD1 SLOW DOWN RIH SPEED, WHP IS UP TO 900 PSI AND WE ARE MAXED OUT ON DOWNSTREAM CHOKE PRESSURE AT 150 PSI 07:40 - 07:55 0.25 EVAL N SFAL PROD1 WHP HAS INCREASED TO 1500 PSI. 07:55 - 09:30 1.58 EVAL N SFAL PROD1 WHP —1600 PSI, STOP RIH TO BLEED OFF WHP WHP DOWN TO 100 PSI WITH THE AND FALLING, CONTINUE RIH TAKING RETURNS TO THE TIGER TANK 09:30 - 10:35 1.08 EVAL N SFAL PROD1 VERY LIGHT TAG AT THE CIBP. PUH TO THE TOL, INCREASE RATE TO DISPLACE THE WELL WITH —120 BBLS OF 1% KCL FOLLOWED BY MUD 10:35 - 11:55 1.33 EVAL N SFAL PROD1 TIGER TANK HAS OVER 400 BBLS AND WE NEED TO SUCK IT OUT. CLOSE IN THE CHOKE AND BACK THE VAC TRUCK IN TO SUCK OUT THE TT. BACK IN A MUD TRUCK AND TOP OFF THE PITS 11:55 - 12:20 0.42 EVAL N SFAL PROD1 VAC TRUCK IS FULL AND MOVED OUT OF THE WAY, CONTINUE DISPLACING WELL TO MUD TANK STRAP AT 130 BBLS 12:20 - 13:10 0.83 EVAL N SFAL PROD1 IA & OA PRESSURES CLIMBING, BLEED OFF TO 200 PSI STOP AT 10000', CLOSE THE CHOKE GET A STRAP ON THE TT AND MAKE SURE THINGS ARE GOING OUR WAY BEFORE POOH 13:10 - 14:40 1.50 EVAL N SFAL PROD1 WHP STARTING TO DROP AT A GOOD RATE AND RETURNS ARE SLUGGING A LITTLE MORE LIKE WERE GETTING FLUID PACKED, START POOH AND BLEED IA & OA AGAIN 900 PSI/ 580 PSI 14:40 - 16:00 1.33 EVAL N SFAL PROD1 POH WITH NOZZLE BHA. TAKE 8.6 -PPG MUD RETURNS BACK TO PITS AT 4000'. FLOW CHECK WELL AT 100' - NO FLOW. 16:00 - 16:30 0.50 EVAL N SFAL PROD1 HOLD PJSM ON LD NOZZLE BHA. DISCUSS POSITIONS OF PEOPLE AND WELL CONTROL CONSIDERATIONS WITH REGARD TO BHA HANDLING. UNSTAB INJECTOR & LD NOZZLE. 16:30 - 17:00 0.50 STWHIP P PROD1 PU WHIPSTOCK & MU WHIPSTOCK RUNNING BHA. MU BHA TO COIL & STAB ON WELL. BHA CONSISTS OF: 3- 3/16" MONOBORE WHIPSTOCK, ADAPTER KIT, SETTING TOOL, XO, HOT, DGS, DPS, EDC, P &C, WEAR SUB, LQC, UQC, AND CTC. OAL = 66.48' Printed 5/30/2012 10:12:42AM • North America - ALASKA - BP Page 6 *A- . Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °1755.8577 Long: 0148°40'14.316"W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 17:00 - 17:15 0.25 STWHIP P PROD1 TEST QTS TO 250 -PSI / 3500 -PSI. HOLD EACH TEST FOR 5- MINUTES. OPEN EDC & BREAK CIRCULATION AT .3 -BPM / 860 -PSI. IA / OA = 370 -PSI / 340 -PSI. 17:15 - 20:30 3.25 STWHIP P -_ PROD1 RIH WITH WHIPSTOCK SETTING BHA TO 11,300' FOR TIE -IN. 20:30 - 21:30 1.00 STWHIP P PROD1 LOG TIE -IN WITH -6.5' CORRECTION. CONTINUE LOGGING DOWN WITH CCL TO 11,668'. PU TO 11,600' AND CORRELATE LOG TO PDC LOG. PDC AND CCL LOGS ARE .5' OFF. PUW 41K. 21:30 - 22:00 0.50 STWHIP P PROD1 RUN BACK DOWN TO SETTING DEPTH OF 11,625'; BOTTOM OF WHIPSTOCK AT 11.633.7'. PU TO NEUTRAL WEIGHT, ORIENT TO 225 ° ROHS. COME ON WITH PUMPS TO SHEAR SETTING TOOL AT 4100 PSI TO SET WHIPSTOCK. SET DOWN 6K, PICK BACK UP TO VERIFY SETTING. TOP OF WHIPSTOC.K AT 11 625'. 22:00 - 00:00 2.00 STWHIP P ._ PROD1 PJSM ON LAYING DOWN BHA WHILE PULLING OUT OF HOLE. 5/9/2012 00:00 - 00:30 0.50 STWHIP P ._ PROD1 FLOW CHECK WELL AT SURFACE. NO FLOW. PULL TO SURFACE. 00:30 - 01:30 1.00 STMILL P PROD1 LD WHIPSTOCK SETTING BHA. ROD IS ATTACHED, ALL LOOKS GOOD. MU MILLING BHA. MILLS GAUGE AT 2.74" GO, 2.73" NO -GO. - 2.74" WINDOW MILL, DIAMOND STRING MILL, XTREME 2- 1/16TH MOTOR, XO, 2 JTS CSH, XO, BLIND SUB, DGS, DPS, EDC, P &C, WEAR SUB, LQC, UQC, CTC - PRESSURE TEST QUICK TEST SUB 01:30 - 04:30 3.00 STMILL P -_ PROD1 RIH WITH MILLING ASSEMBLY. CONDUCT TIE -IN WITH -5' CORRECTION. 04:30 - 04:35 0.08 STMILL P PROD1 PICK BACK UP TO LOG CCL FOR JEWELRY PLACEMENT FROM 10,200- 10,400'. DURING TRIP UP, TOP ROLLER ON INJECTOR MAKING ALOT OF NOISE. 04:35 - 06:00 1.42 EVAL P PROD1 TROUBLESHOOT ROLLERS ON INJECTOR. SLB CREW CANNOT DETERMINE WHAT IS WRONG. CALL TO SLB MAINTENANCE SUPERVISOR. WAS TOLD TO NOT OPERATE ANY FURTHER. MECHANIC ON LOCATION. INSPECTS INJECTOR, INCREASES CHAIN TENSIONER. SEEMS THAT NO ISSUES ARE APPARENT. 06:00 - 06:15 0.25 EVAL P PROD1 LOG CCL FROM 10,200' TO 10,400'. 06:15 - 07:00 0.75 STMILL P PROD1 RIH WITH MILLING ASSEMBLY TO 11.625'. DOWN ON PUMPS AND DRY TAG WHIPSTOCK TOP LIGHTLY AT 11,625'. PICK PUMP RATES. ONE FOR ONE RETURNS, 8.70 PPG MUD WEIGHT. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP 10/ Page 7 ate. Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) %VW 07:00 - ¶3:30 6.50 STMILL P PROD1 SET BACK DOWN AND TAG WITH PUMPS ON AT 10,624'. PU, BACK DOWN AND BEGIN C' ZV TIME MILLING. FREE SPIN 2420 PSI AT 1.55 BPM. '.2 - TIME MILLING WITH .56K WOB, 2490 PSI Wi S1 - BEGIN MILLLING USING WOB AND 6/ I DIFFERENTIAL PRESSURE; INITIAL WOB 1.27K, 2620 PSI AT 11,624'. - WOB 1.70K, 2550 PSI AT 1.55 BPM AT 11,625' - WOB 1.48K, 2500 PSI AT 1.55 BPM AT 11,626' - WOB 1.63K, 2555 PSI AT 1.55 BPM AT 11,627' - AT MIDWAY POINT OF EXIT, BACK TO TIME MILLING. EXIT WINDOW, REAM THROUGH • WITH STRING MILL TO CLEAN IT UP. 13:30 - 19:00 5.50 STMILL P PROD1 MILL 10' OF NEW FORMATION. BACKREAM WINDOW. CONDUCT DRY PASS, WINDOW GOOD. NO ISSUES OBSERVED. 19:00 - 19:30 0.50 STMILL P PROD1 PULL INTO WINDOW. FLOW CHECK WELL. OPEN EDC, BEGIN PULLING UP HOLE INSIDE LINER. 19:30 - 23:00 3.50 STMILL P PROD1 PULL ABOVE DEPLOYMENT SLEEVE. BLOW DOWN MICROMOTION; PACKED OFF WITH METAL SHAVINGS. CONTINUE TO POH AT SLOW RATE TO KEEP CUTTINGS ABOVE EDC. PJSM ON LAYING DOWN BHA. FLOW CHECK AT SURFACE, ALL GOOD. PULL TO TAG AT SURFACE. 23:00 - 00:00 1.00 STMILL P PROD1 POP OFF WITH INJECTOR, LD BHA. GAUGE MILLS: DIAMOND MILL UNDER GAUGE 2.71" NO -GO, 2.72" GO. STRING MILL UNDER GAUGE AT 2.72" NO -GO, 2.73" GO. 5/10/2012 00:00 - 00:30 0.50 STMILL P PROD1 MOBILIZE MILLING BHA OFF OF RIG FLOOR. CLEAR AND CLEAN RIG FLOOR. 00:30 - 01:00 0.50 DRILL P PROD1 MU NOZZLE ASSEMBLY. JET STACK TO CLEAN IT OF ANY METAL SHAVINGS. 01:00 - 02:00 1.00 DRILL P PROD1 CONDUCT PLANNED MAINTENANCE ON SHAKER, CLEAN HIGH PRESSURE FILTERS, CHANGE OIL IN ENGINE, INSPECT COUNTER AND SPROCKET ON INJECTOR. 02:00 - 03:00 1.00 DRILL P PROD1 PJSM ON MAKING UP BUILD BHA. MU BUILD BHA: 2.70 "X3.0" BI-CENTER BIT (HYC - SRR3408M- B7 -Z), 2 -3/8" EXTREME MOTOR WITH 2.06 AKO, HOT, DGS, DPS, EDC, P &C, WEAR SUB, LQC, UQC, CTC 03:00 - 05:15 2.25 DRILL P PROD1 RIH WITH BUILD BHA ASSEMBLY. 05:15 - 07:15 2.00 EVAL P PROD1 CONDUCT LONG TIE IN FOR GEOLOGIST PDC CORRELATION FROM 11250' TO 11638' , RA TAG @ 11630' CORRECTION = - 8' 07:15 - 15:45 8.50 DRILL P PROD1 START DRILLING FROM 11638' - 1.75 IN , 1.78 OUT, 2640 PSI, .7K WOB, ROP = 29 FPH FIRST CUTTINGS TO SURFACE SHOW 20% CHERT - BIT WILL NOT TAKE WEIGHT BEYOND 800# WITHOUT STALLING - ROP ERRATIC AND SLOWING TO 3 -6 FPH Printed 5/30/2012 10:12:42AM • North America - ALASKA - BP Page 8 OW Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148 °40'14.316 "W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 15:45 - 16:15 0.50 DRILL P PROD1 OBTAIN SLOW PUMP RATES @ 11700' PUMP #1 1.75 BPM 2490 PSI 83 SPM 1.0 1720 49 0.5 1275 22 PUMP #2 1.75 2480 82 1.0 1630 43 0.5 1275 21 16:15 - 20:30 4.25 DRILL P PROD1 ROP NOT IMPROVING - FLOW CHECK WELL / OK - POOH W/ BHA #4 FROM 11700' TO INSPECT FOR DAMAGE - OPEN EDC ABOVE WINDOW TO ASSIST JETTING CUTTING TO SURFACE - 3.3 BPM X 3010 PSI - IA 620 #, OA 650 #, CUTTING SAMPLE WILL BE TO SURFACE @ 18:00 HRS - SAMPLES REVEAL 70% CHERT - FLOW CHECK WELL AT SURFACE. PJSM ON LAYING DOWN BHA. PULL TO SURFACE, POP OFF. 20:30 - 21:30 1.00 DRILL P PROD1 LD BHA. CHIPPED TEETH BUT BIT IN OTHERWISE GOOD CONDITION. BIT GRADE 5- 1- BT- N- X- I- WT -PR. (PIC'S ATTACHED) CHANGE OUT MOTOR AND BIT. MU BHA # 5: 2.70 "X3.0" BI- CENTER BIT (HYC - SRF3408M-B7), 2 -3/8" EXTREME MOTOR WITH 2.40 AKO, HOT, DGS, DPS, EDC, P &C, WEAR SUB, LQC, UQC, CTC. PRESSURE TEST QUICK TEST SUB. 21:30 - 00:00 2.50 DRILL P PROD1 RIH WITH NEW BUILD ASSEMBLY 5/11/2012 00:00 - 00:45 0.75 DRILL P PROD1 LOG FOR GEOLOGISTS FROM 11,170'- 11,250'. 00:45 - 01:30 0.75 DRILL P PROD1 RIH TO 11,630' FOR TIE -IN WITH -6.5' CORRECTION. CONTINUE TO RIH. GET SLOW PUMP RATES. 01:30 - 02:30 1.00 DRILL P PROD1 ON BOTTOM DRILLING @ 11700' - FS = 2560 @ 1.75 - IN 1.78, OUT 1.8 © 2710 #, WOB .46, INITIAL ROP = 18 FPH 02:30 - 04:00 1.50 DRILL P PROD1 DRILLING @ 11718', 1.78 IN - 1.80 OUT @ 2820 #, ROP = 18 - 23 FPH - FIRST SURVEY SHOWING 41 DEGREE DL W/ NEW MOTOR BEND. MOTOR STALLED @ 11747' WHEN INCREASED WOB TO 1000# - PU AND RESTART W/ .7K - ROP = 15 FPH 04:00 - 05:45 1.75 DRILL P PROD1 DRILLING AHEAD TO 11763' PARAMETERS 1.75 IN - 1.77 OUT © 2730 #, WOB =1.5K, ROP = 18 FPH 05:45 - 06:00 0.25 DRILL P PROD1 MOTOR WORK INCREASED TO 200# - ROP UP TO 40 FPH, 1.75 IN - 1.77 OUT @ 2860 #, 1000# WOB IA 650 #, OA 530# 06:00 - 06:30 0.50 DRILL P PROD1 BHA WIPER TRIP. OBTAIN SLOW PUMP RATES. NO ISSUES ON WIPER. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 9 Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:OOAM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148 °40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:30 - 10:30 4.00 DRILL P PROD1 BACK ON BOTTOM. FREE SPIN OF 2675 PSI AT 1.75 BPM. - CONSECUTIVE STALLS ON TAGGING BOTTOM, ATTRIBUTE IT TO STICK SLIP AT THIS TIME. BEGIN ADDING LUBE TO INCREASE CONCENTRATION BY 1/2% - LUBES HELPED TO GET TO BOTTOM AND BEGIN DRILLING - 1.75 BPM IN AND OUT, .77-2.1K WOB, 2715 -2825 PSI, ECD 10.35 PPG - MW IN AND OUT 8.67 PPG DOG LEG SEVERITY 28 TO 41 PER 100'; ONE ANOMOLY AT 45 / 100' 10:30 - 11:15 0.75 DRILL P ■- PROD1 WIPER TRIP TO WINDOW. TROUBLE ON PULLING UP HOLE AND THEN GOING BACK DOWN PAST 11,785'. 11:15 - 13:00 1.75 DRILL P PROD1 DRILL DIRECTIONALLY FROM 11,850'. FREE SPIN 2600 PSI AT 1.75 BPM. - 1.78 BPM, 2820 PSI, 1.22-1.41K WOB, ECD 10.36 PPG 13:00 - 13:15 0.25 DRILL P PROD1 WIPER TRIP WHILE CONSULTING WITH GEOLOGIST ON DOG LEG SEVERITY AND LANDING TARGET. OVERPULL AT 11,785' AGAIN. NO ISSUES MOVING DOWN PAST IT THIS TIME. 13:15 - 15:30 2.25 DRILL P PROD1 DRILL AHEAD DIRECTIONALLY FROM 11,910'. FREE SPIN 2690 PSI AT 1.79 BPM. - 1.78 -1.80 BPM, 2800 -2985 PSI, 1.15 -1.73K WOB, ECD 10.42 PPG, MW IN 8.66PPG, MW OUT 8.70 PPG - LESS THAN A BBL PER HOUR LOSSES WHILE DRILLING AHEAD 15:30 - 19:00 3.50 DRILL P PROD1 WIPER UP TO WINDOW WITH NO ISSUES PASSING BY 11,785'. PULL INTO WINDOW, OPEN EDC. COME ON WITH PUMPS AND PUMP AT 3.4 BPM UP THROUGH LINER. 19:00 - 19:25 0.42 DRILL P -_ PROD1 CLOSE EDC AND CIRCULATE ABOVE WINDOW FOR DD CHANGEOUT 19:25 - 19:45 0.33 DRILL P PROD1 RIH AND CONFIRM TD @ 12005 - GET SLOW PUMP RATES PUMP #1 1.75 BPM 2550 PSI 83 SPM PUMP #2 1.75 BPM 2700 PSI 84 SPM 1.0 1825 49 1.0 1880 49 0.5 1385 23 0.5 1560 26 19:45 - 21:55 2.17 DRILL P ._ PROD1 BACK ON BOTTOM DRILLING @ 12005', 1.76 BPM, 2585 FS PVT 303, IA 775 #, OA 822# 21:55 - 22:50 0.92 DRILL P ._ PROD1 WIPER TO WINDOW FROM 12150', TIE IN LOG • 11630' - GEO SAYS OUT OF TAR AT 12150' 22:50 - 00:00 1.17 DRILL P PROD1 ON BOTTOM AND DRILL AHEAD FROM 12150', 1.72 BPM, 2650 FS, PVT 301, IA 752 #, OA 746# - DRILL TO 12180' MD / 8969' TVD, TOTAL DAILY FOOTAGE = 479' 5/12/2012 00:00 - 01:50 1.83 DRILL P PROD1 DRILL AND LAND BUILD SECTION @ 12299' 01:50 - 02:30 0.67 DRILL P ■- PROD1 POOH C JUST WINDOW EDC - FLOW CHECK ECC WELL - E K WELL OK - OPEN EDC AND WASH TRAY AT 2.75 BPM Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 10 m Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING ©62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 06:00 3.50 DRILL P PROD1 POOH AT 60 FPM X 3.2 BPM @ 3300 PSI TO KEEP CUTTINGS MOVING UP - JOG FROM 200' TO 500' AT 100 FPM X 3.4 BPM - TAG AT SURFACE AND FLOW CHECK WELL / OK 06:00 - 07:15 1.25 DRILL P PROD1 CREW CHANGE OUT. PJSM ON LD OF BHA. LD BHA, BIT GRADE 07:15 - 07:45 0.50 EVAL P PROD1 FUNCTION TEST BOP. FUNCTION ALL RAMS AND BAG FROM COIL OPERATOR REMOTE CONSOLE. 07:45 - 08:45 1.00 DRILL P PROD1 PJSM ON MU OF BHA. MU LATERAL ASSEMBLY: 2.70 "X3.0" BIT, 2 -3/8" XTREME MOTOR WITH 1.2° BEND, HOT, USR, DGS, DPS, EDC, P &C, WEAR SUB, LQC, UQC, CTC. PRESSURE TEST QUICK TEST SUB. 08:45 - 11:30 2.75 DRILL P PROD1 RIH WITH LATERAL ASSEMBLY. TIE -IN AT 11,320' WITH -10 CORRECTION. 11:30 - 13:00 1.50 EVAL P PROD1 MAD PASS AT 600' /HR FROM 11,600' TO 12,300'. BEGIN DISPLACEMENT TO NEW 8.5 PPG POWERVIS MUD. 13:00 - 15:30 2.50 DRILL P PROD1 DRILL AHEAD FROM 12,300'. FREE SPIN OF 2300 PSI AT 1.75 BPM. - 1.75 -1.88 BPM, 2580 -2800 PSI, .9 -2.2 K WOB, ECD 10.0 PPG, MW IN AND OUT 8.5 PPG 15:30 - 16:15 0.75 DRILL P PROD1 WIPER TRIP TO WINDOW. MUD SYSTEM FULLY SWAPPED OVER TO 8.5 PPG POWERVIS. PRESSURES HAVE DROPPED. 16:15 - 17:30 1.25 DRILL P PROD1 DRILL AHEAD FROM 12,450'. FREE SPIN 2140 PSI AT 1.75 BPM. - 1.75 BPM, 2380 PSI, 1.46 -1.80 K WOB - DRILLING AT 100 FPH - PUW INCREASED FROM 45K TO 52K ON INITIAL PICK UP FOR WIPER 17:30 - 17:45 0.25 DRILL P PROD1 BHA WIPER. USUALLY RUNNING AT 40K ON TRIP UP, RUNNING AT 45K ON THIS WIPER. VERY LITTLE CUTTINGS ACROSS SHAKER. GET CREW TO MIX UP A 30 BBL HI-VIS PILL FOR EVENTUAL WIPER INTO WINDOW. 17:45 - 18:00 0.25 DRILL P PROD1 DRILL AHEAD FROM 12,570'. FREE SPIN 2140 PSI AT 1.75 BPM. 18:00 - 18:50 0.83 DRILL P PROD1 WIPER TO WINDOW FROM 12600' - MIX HI -VIS SWEEP - OPEN EDC @ 11600' 18:50 - 18:55 0.08 DRILL P PROD1 5 MINUTE FLOW CHECK = OK 18:55 - 19:55 1.00 DRILL P PROD1 JET WS TRAY & 7" CASING @ 3.35 BPM X 3260 PSI 19:55 - 20:15 0.33 DRILL P PROD1 PUMP 30 BBL HI-VIS PILL FOR HOLE CLEANING WHILE TIH TO 10350' @ 70 FPM X 3.4 BPM 20:15 - 22:15 2.00 DRILL P PROD1 PILL OUT THE BOTTOM OF COIL AND POOH TO 3000' @ 3.4 BPM 22:15 - 00:00 1.75 DRILL P PROD1 HEAD BACK TO BOTTOM FROM 3000' AT 100 FPM X 3.4 BPM - DID NOT SEE ANY INCREASE IN CUTTINGS WHEN PILL GOT TO SURFACE 5/13/2012 00:00 - 00:10 0.17 DRILL P PROD1 CONTINUE TO RIH FROM WIPER TRIP - CLOSE EDC @ 11500' Printed 5/30/2012 10:12:42AM 0 North America - ALASKA - BP Page 11 OK Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 00:10 - 00:45 0.58 DRILL P PROD1 TIE IN @ 11635' = + 10' - GET SLOW PUMP RATES PUMP #1 1.75 BPM 2340 PSI 82 SPM PUMP #2 1.75 BPM 2310 PSI 80 SPM 1.0 1432 47 1.0 1425 44 0.5 1041 24 0.5 1033 23 00:45 03:00 2.25 DRILL P ■- PROD1 BACK ON BOTTO DRL ►. A A03' 1.8 IN, 1.63 OUT, @ 2355 PSI, PVT 302 BBLS, IA 696 #, OA 730# - DRILL TO 12750 • 115 FPH 03:00 - 03:45 0.75 DRILL P -_ PROD1 WIPER TRIP FROM 12750' - PVT298, IA 697, OA 721, WH 11 03:45 - 04:10 0.42 DRILL P PROD1 BACK TO BOTTOM FROM 11650' 04:10 - 06:40 2.50 DRILL P PROD1 DRILLING AHEAD a 12750' 1.7BPM @ 2300 PSI, PVT 302, ROP = 130 FPH - TROUBLE GETTING BY SHALE AT 12750' - HAD TO RIH • 70 FPM TO GET THROUGH 06:40 - 11:15 4.58 DRILL P PROD1 WIPER TRIP TO WINDOW WENT WELL WITH NO ISSUES, ECD HAD DROPPED ON TRIP UP TO 9.75; HOLE SEEMS TO BE PRETTY CLEAN. PULL INTO WINDOW, OPEN EDC AND JET ACROSS WHIPSTOCK TRAY. BEGIN PULLING UP HOLE PUMPING AT MAX RATE THROUGH EDC. SWAP TO SECOND HI- PRESSURE FILTER SCREEN DUE TO HIGH CIRCULATION PRESSURES. TEMPORARY DROP IN PRESSURE OF 200 -250 PSI. PRESSURE INCREASED AFTER 30 BBLS OF PUMPING. - BOTTOMS UP FROM WINDOW WITH NO REAL INCREASE IN CUTTINGS. - KICK WHILE TRIPPING DRILL WITH GOOD CREW RESPONSE. MOTORMAN AT KOOMIE, SCS CHECKED IN. SIMULATE FLOW, DOWN ON PUMPS AND CLOSE IN NCR. FLOORHAND IN CELLAR, CONFIRM CLOSURE OF CHOKE. WELL SHUT IN. CONDUCT AAR ON ACTIONS. - BOTTOMS UP FROM DEPLOYMENT SLEEVE HAS SLIGHT INCREASE IN CUTTINGS ACROSS SHAKERS 11:15 - 14:30 3.25 DRILL P PROD1 TURN AROUND AND RUN BACK DOWN AT 100 FT /MIN PUMPING AT 3.4 BPM IN ATTEMPT TO RUN CUTTINGS OUT OF 7 ". STOP ABOVE LINER TOP TO CHANGE OUT HI PRESSURE SCREENS. PRESSURE TEST TO 250 PSI LOW AND 4000 PSI HIGH. CONTINUE TO RIH TO WINDOW. CLOSE EDC. RIH TO 12,900'. RUN IN WENT WELL TO 12,765'. SEVERAL TAGS AND WORK THROUGH AT 12,767'. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 12 aittg Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148 °40'14.316 "W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 14:30 - 19:00 4.50 DRILL P PROD1 ON BOTTOM. OBTAIN SLOW PUMP RATES. FREE SPIN 2630 PSI AT 1.8 BPM. DRILL AHEAD FROM 12,900'. - DRILLING AHEAD WITH NEGATIVE COIL TUBING WEIGHT - CONDUCT FREQUENT BHA WIPERS WITH OVERPULL ON INITIAL PICKUPS - HAVE TO WORK THROUGH 13,000' SEVERAL TIMES AFTER A BHA WIPER. KEEP STACKING OUT. - WORK THROUGH, ABLE TO DRILL AHEAD BY REDUCING PUMP RATE - 1.35 -1.87 BPM, 2250 -2940 PSI, ECD 10.05 -10.41 PPG, .5 -2.3K WOB, MW IN 8.51 PPG, MW OUT 8.58 PPG 19:00 - 19:35 0.58 DRILL P -_ PROD1 BHA WIPER FROM 13032' / CREW CHANGE - GET SLOW PUMP RATES 19:35 - 20:20 0.75 DRILL P -_ PROD1 ON BOTTOM DRILLING AT 13032' - 1.7 BPM @ 2632 PSI, PVT = 264 BBLS 20:20 - 21:20 1.00 DRILL P -_ PROD1 STRUGGLE WITH WEIGHT TRANSFER - POOH FOR AGITATOR FROM 13050' 21:20 - 21:35 0.25 DRILL P -_ PROD1 OPEN EDC AT WINDOW - 5 MINUTE FLOW CHECK - OK 21:35 - 23:10 1.58 DRILL P ■- PROD1 JET TRAY 10 2.05 BPM X 0JET LINER TOP @ 10350' AND JOG G 1 1000 0' PUMP 20 BBL HI-VIS SWEEP • 3BPM X 3400PSI 23:10 - 00:00 0.83 DRILL P -_ PROD1 CONTINUE POOH @ 60FPM X 3 BPM X 3450 PSI - PVT= 244, IA 820, OA 765, WH 50 5/14/2012 00:00 - 01:50 1.83 DRILL P -_ PROD1 POOH FROM 13052' TO INSPECT BHA AND PU AGITATOR 01:50 - 02:00 0.17 DRILL P -_ PROD1 STOP POOH AT 200' - JOG BACK TO 400' CIRCUALTING AT MAX RATE 02:00 - 03:00 1.00 DRILL P PROD1 TAG AT SURFACE - FLOW CHECK WELL - OK - CLOSE EDC - PJSM AND POP OFF WELL / LAY DOWN AND INSPECT DRILLING BHA - BIT GRADED 1 -1 03:00 - 04:20 1.33 DRILL P ._ PROD1 KEEP HOLE FULL AND MU BHA PICKING UP AGITATOR AND FLOAT SUB 04:20 - 08:30 4.17 DRILL P PROD1 STAB INJECTOR ON WELL AND RIH @ 90 FPM X .31 BPM IN .81 OUT @ 600 PSI. LOG TIE -IN AT 11,630' WITH -11' CORRECTION. CONTINUE TO RIH TO 13,050'. 08:30 - 13:00 4.50 DRILL P PROD1 ON BOTTOM WITH NO ISSUES. WEIGHT TRANSFER MUCH BETTER WITH AGITATOR. DRILL AHEAD FROM 13,050'. FREE SPIN 3170 PSI AT 1.7 BPM. - 1.65- 1.75BPM, 3440 -3670 PSI, 1.62 -2.6K WOB, ECD 10.35 PPG, MW IN AND OUT 8.58 PPG - ROP DROPPED OFF AT 13,099'. CONSULT WITH GEO, DROP BELOW SHALE ZONE AND DRILLING IMPROVES. WILL TURN BACK UP TO TRACK UP WITH THE CURRENT FORMATION. - GAMMA INDICATES DRILLING THROUGH PLENTY OF SHALE STILL. MAKE SEVERAL ATTEMPTS TO DRILL AHEAD. PLENTY OF WOB BUT CANNOT GAIN DIFFERENTIAL. SUSPECT BIT BALLING. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 13 off., Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 13:00 - 13:45 0.75 DRILL P PROD1 500' WIPER TRIP WITH INCREASE FLOW RATE AND ORIENTING BIT AROUND IN ATTEMPT TO KNOCK OFF SUSPECTED CLAYS ON BIT. TRIP WENT WELL. 13:45 - 15:00 1.25 DRILL P PROD1 ATTEMPT TO DRILL AHEAD, CANNOT GET MOTOR WORK. PICK UP, SET DOWN WITH 3.5K WOB TO SEE IF IT WILL GENERATE MOTOR WORK. NO MOTOR WORK. ATTEMPT AGAIN WITH 4K DOWN. STILL NO MOTOR WORK. PUMP LO-VIS AND HI-VIS SWEEP COMBO. ATTEMPT TO DRILL AGAIN, NO MOTOR WORK. FLOW CHECK OFF BOTTOM. 15:00 - 20:00 5.00 DRILL P PROD1 POH FOR BHA INSPECTION. CHASE SWEEP OUT OF HOLE. INITIAL PICK UP OFF BOTTOM GOOD. WIPER TRIP TO WINDOW GOOD. FLOW CHECK AT WINDOW. OPEN EDC. PICK UP THROUGH LINER AT MAX RATE. PUMP HI-VIS SWEEP ACROSS LINER TOP AND RUN BACK DOWN TO FLUSH IT. PULL BACK UP HOLE PUMPING AT MAX RATE. CONTINUE POOH TO 200' JOG TO 600' AND PULL TO SURFACE. 20:00 - 20:30 0.50 DRILL P PROD1 5 MIN FLOW CHECK - OK. CREW CHANGE. PJSM FOR BHA SWAP. 20:30 - 22:20 1.83 DRILL P PROD1 POP OFF AND STAND BACK INJECTOR. LAY DOWN BHA. BIT GRADED 1 -1 -W/ 1CHIPPED TOOTH, W /CLAY IN WATER COURSES - SIGNIFICANT QUANTITY OF METAL SHAVINGS ON MAGNET (PIC'S ATTACHED) 22:20 - 23:05 0.75 DRILL P PROD1 MAKE UP DRILLING BHA# 8 - REPLACE MOTOR, AGITATOR, AND BIT - TEST QTS SUB AND ZERO MECHANICAL COUNTER 23:05 - 00:00 0.92 DRILL P PROD1 RIH W/ BHA #8 - PERFORM SLACK MANAGEMENT - TEST AGITATOR AT 200' = GOOD 5/15/2012 00:00 - 05:30 5.50 DRILL P PROD1 RIH W/ BHA# 8 TO 13155'. OBTAIN SLOW PUMP RATES. MW IN AND OUT 8.56 PPG. 05:30 - 10:45 5.25 DRILL P PROD1 ATTEMPT TO DRILL AHEAD FROM 13,155'. HARD TO GET TO BOTTOM. SHALE FROM 13070' TO TD OF 13,155'. TRY SEVERAL CHANGES IN APPROACH WITH PUMP RATES AND WIPERS. 70K PUW ON ONE PICK UP. BEEN AVERAGING 42K PU AFTER BREAKOVER. - GOT TO BOTTOM AND DRILLING AHEAD WITH 30 -40 FPH ROP - DRILLED TO 13,291'; ATTEMPT TO PU FOR SHORT WIPER, PUW AT 61K. DECISION IS TO CONDUCT FULL WIPER TO WINDOW. - 1.65 -1.70 BPM, 3270 -3410 PSI, .82 -1.58K WOB, ECD 10.45 PPG, MW IN AND OUT 8.61 PPG 10:45 - 12:10 1.42 DRILL P PROD1 WIPER TO WINDOW. NOTICE SHALES AROUND 13,155'. 12:10 - 13:00 0.83 DRILL P PROD1 TIE INTO RA -TAG. CORRELATE AND APPLY +8.5' CORRECTION. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 14 ©S6 Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316"W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 13:00 - 13:30 0.50 DRILL P PROD1 RIH FROM WIPER. HAVE TO WORK THROUGH STICKY SHALES ONWARDS FROM 13,000' ON TRIP BACK TO BOTTOM. 13:30 - 14:45 1.25 DRILL P PROD1 DISCUSS WITH MUD ENGINEER: 1.5% SOLIDS AND ALMOST 1,000' ON MUD SYSTEM. AGREE TO CHANGE MUD ORDER NEW MUD SYSTEM FROM MI SWACO. 14:45 - 15:20 0.58 DRILL P PROD1 DRILL AHEAD SLOWLY WHILE ADDING LUBRICANTS. 15:20 - 16:10 0.83 DRILL P PROD1 PERFORM EXTENDED BHA -WIPER TRIP (300') FROM 13,322'. 16:10 - 17:05 0.92 DRILL P PROD1 CONTINUE DRILLING AHEAD FROM 13,322'. 17:05 - 18:20 1.25 DRILL P PROD1 PERFORM EXTENDED BHA -WIPER TRIP (300') FROM 13,361'. 18:20 - 19:50 1.50 DRILL P PROD1 DRILLING AHEAD. PUMPRATE = 1.49 BPM / CIRC PRESSURE = 3,040 PSI WOB = 0.96K LBS / ROP = 55 FPH / ECD = 10.50 PPG MW IN = 8.62 PPG / MW OUT = 8.62 PPG lAP = 540 PSI OAP = 450 PSI 19:50 - 21:10 1.33 DRILL P PROD1 MOTOR STALLS OUT. PICK UP, BUT HAVE TO WORK COIL AROUND 13,340' TO GET BACK DOWN TO DEPTH. 21:10 - 21:30 0.33 DRILL P PROD1 START PUMPING 35BBLS OF 9.6PPG HIGH DENSITY PILL DOWN COIL. DRILLING AHEAD FROM 13,430'. PUMPRATE = 1.60 BPM / CIRC PRESSURE = 2,915 PSI WOB = 0.91K LBS / ROP = 50 FPH / ECD = 10.59 PPG MW IN = 9.39 PPG / MW OUT = 8.64 PPG IAP = 537 PSI OAP = 441 PSI 21:30 - 21:50 0.33 DRILL P PROD1 START MUD - CHANGE. TAKE NEW 8.5PPG MUD OFF TRUCK AND PUMP DOWN COIL. 21:50 - 22:05 0.25 DRILL P PROD1 DRILL TO 13,4555 TO TAKE SURVEY. WITH NEW MUD COMING OUT OF NOZZLE, PERFORM BHA -WIPER 22:05 - 22:30 0.42 DRILL P PROD1 COMMENCE 150' WIPER TRIP TO WINDOW. CHASE 35BBLS OF HIGH DENSITY PILL WITH NEW 9.5PPG MUD. POOH AT 23FPM, PUMPING AT 1.7BPM (1.8BPM IS MAX RATE WITH 2 3/8" BHI X -TREME MOTOR). 22:30 - 23:25 0.92 DRILL P PROD1 HAVE NOT NOTICED ANY SHALE - ISSUES WHEN PULLING UP TO 13,000'. KEEP PULLING. 23:25 - 23:30 0.08 DRILL P PROD1 REDUCE PUMP RATE DOWN TO MINIMUM RATE WHEN APPROACHING WINDOW AND ORIENT TOOLFACE TO "AS DRILLED'. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 15 SOW Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°4014.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 23:30 - 23:40 0.17 DRILL P PROD1 PULLED TO 11,600' ABOVE WINDOW. SHUT -DOWN PUMPS AND FLOW -CHECK WELL - ACHIEVE GOOD NO -FLOW. OPEN EDC. COME BACK ONLINE WITH PUMPS AT 3.6BPM (3.8BPM IS MAX WITH EDC OPEN) AND PULL UP AT 75FPM (80% OF FLUID VELOCITY). 23:40 - 00:00 0.33 DRILL P PROD1 PULL TO 9,000'. 5/16/2012 00:00 - 00:20 0.33 DRILL P PROD1 RUN BACK IN HOLE @ 100FPM TO INCREASE OUT -RATE UP TO 4.11 BPM WITH HELP OF COILED TUBING DISPLACEMENT. 00:20 - 01:00 0.67 DRILL P PROD1 HIGH DENSITY PILL IS (THEORETICALLY) COMING BACK OVER SHAKER. CAN BARELY SEE AN INCREASE IN DENSITY ( +0.02PPG) AND DO NOT NOTICE ANY INCREASE IN CUTTINGS. 01:00 - 02:00 1.00 DRILL P PROD1 RUN TO 11,600' AND PU AT 75FPM (80% OF FLUID VELOCITY) TO ENHANCE HOLE CLEAN -OUT. 02:00 - 03:00 1.00 DRILL P PROD1 POH TO 3,000'. NOTICE A FAIR & STEADY AMOUNT OF CUTTINGS COMING OVER THE SHAKER. DEFINITELY MORE THAN EXPECTED AFTER HAVING CHANGED TO A BRAND -NEW MUD - SYSTEM. 03:00 - 04:30 1.50 DRILL P PROD1 PULL UP ALL THE WAY TO 3,000'. TURN AROUND AND RUN BACK IN HOLE. 04:30 - 05:30 1.00 DRILL P PROD1 AT 11,650' CLOSE EDC AND START LOGGING FOR TIE -IN AT 2.5FPM. CORRELATE AND APPLY +9' CORRETION TO 11,676.95'. IA = 714PSI / OA = 835PS1. 05:30 - 07:00 1.50 DRILL P PROD1 RIH IN HOLE AT 43FPM AND PUMPING AT —0.5BPM. SEE SMALL "FLICKER" AT 13,180' AND ALSO AT 13,250', HOWEVER HAVE TO WORK COIL ONWARDS FROM 13,357' to 13,455'. 07:00 - 12:00 5.00 DRILL P PROD1 DRILL AHEAD TO 13520 -FT MD. PUMP AT 1.94 BPM WITH 3442 PSI ON BOTTOM, 3025 PSI FREE SPIN. WOB .45K WITH 30 ROP. MUD WEIGHT IN AND OUT 8.6 PPG. ECD 10.6 PPG EMW. STILL HAVING TROUBLE, DRILLING AHEAD WITH NEGATIVE WEIGHT AND THE AGITATOR RUNNING INTERMITANTLY. 12:00 - 15:30 3.50 DRILL P PROD1 r)RILI AHEAD IN LATERAL SECTION OF PRODUCTION HOLE AT 13,561 -FT MD. PUMP AT .75 BPM TO 1.94 BPM WITH 3475 PSI ON BOTTOM, 3025 PSI FREE SPIN. WOB .86K WITH 43 ROP. MUD WEIGHT IN AND OUT 8.6 PPG. ECD 10.6 PPG EMW. STILL HAVING TROUBLE, DRILLING AHEAD WITH NEGATIVE WEIGHT AND THE AGITATOR RUNNING INTERMITANTLY. DECISION MADE TO POOH AND DRILL A SIDETRACK. 15:30 - 15:45 0.25 DRILL N DPRB 13,561.00 PROD1 FLOW CHECK WELL - STATIC. 15:45 - 17:15 1.50 DRILL N DPRB 13,561.00 PROD1 POOH TO WINDOW AT 11,625 -FT MD. OPEN EDC. PUMP HI-VIS SWEEP. POOH AND TIME SWEEP TO BE AT ECD AS PASSING INTO THE 7 -IN LINER. 17:15 - 19:30 2.25 DRILL N DPRB 13,561.00 PROD1 POOH TO BHA AT 75 -FT. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 1 Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148 °40'14.316 "W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 19:30 - 20:00 0.50 DRILL N DPRB 13,561.00 PROD1 PULL TO SURFACE, THEN "JOG" BACK IN HOLE TO 500FT. 20:00 - 20:15 0.25 DRILL N DPRB 13,561.00 PROD1 PICK UP TO 200FT AND FLOW CHECK WELL - STATIC. PULL BHA TO SURFACE, INCREASE PUMPRATE AND CONFIRM AGITATOR IS WORKING. 20:15 - 21:00 0.75 DRILL N DPRB 13,561.00 PROD1 LAY DOWN BHA #8. GRADE BIT 1 -1 WT- N -X -I- PN-HP. 21:00 - 21:40 0.67 WHIP N DPRB 13,561.00 WEXIT CHANGE OUT PACK -OFF'S ON INJECTOR. 21:40 - 22:00 0.33 WHIP N DPRB 13,561.00 WEXIT PICK UP INJECTOR AND CHANGE -OUT BHI CHECK VALVES IN UPPER QUICK CONNECT (UQC). CHECK COIL IN GOOD CONDITION, NO NEED TO CUT. 22:00 - 22:20 0.33 WHIP N DPRB 13,561.00 WEXIT STAB ON INJECTOR AND CLOSE SWAB AND MASTER VALVES. 22:20 - 22:50 0.50 WHIP N DPRB 13,561.00 WEXIT PERFORM PRESSURE TEST ON PACK - OFF'S AND BHI CHECK VALVES AGAINST CLOSED TREE VALVES TO 250PSI / 5MIN AND 3,500psi / 5MINS. OBTAIN GOOD TEST. 22:50 - 23:00 0.17 WHIP N DPRB 13,561.00 WEXIT HOLD PJSM BEFORE MAKING UP BHA #9 WITH WHIPSTOCK. 23:00 - 23:30 0.50 WHIP N DPRB 13,561.00 WEXIT MAKE UP 2 -5/8" X 3- 3/16" WHIPSTOCK WITH 033 WS PACKER AND STAB ON INJECTOR. 23:30 - 00:00 0.50 WHIP N DPRB 13,561.00 WEXIT CONDUCT SHELL -TEST ON MUD PUMP #1 FOLLOWING COMPLETED MAINTENANCE ON PUMP. PRESSURE -TEST QUICK TEST SUB (QTS). 5/17/2012 00:00 - 03:15 3.25 WHIP N DPRB 13,561.00 WEXIT OPEN EDC AND RIH WITH BHA #9. CIRCULATE AT MINIMU RATE OF 0.20BPM. CIRC PRESSURE = 660 PSI. IA = 243 PSI / OA = 334 PSI. 03:15 - 03:45 0.50 WHIP N DPRB 13,561.00 WEXIT START LOGGING DOWN FOR GR TIE IN TO TOP OF SAG RIVER AT 100FT /HR. CORRELATE AND APPLY -10' DEPTH - CORRECTION TO 11,216.7FT. 03:45 - 04:00 0.25 WHIP N DPRB 13,561.00 WEXIT TAKE PICK UP WEIGHT: 38K LBS CONTINUE RIH. 04:00 - 04:30 0.50 WHIP N DPRB 13,561.00 WEXIT RIH TO 11.484.26' WHICH BRINGS ThlE-I P- OF THE WHIPSTOCK TRAY TO 1 425'. SET THE PUMP TRIP TO 4,500PSI AND ORIENT THE TOOLFACE TO 40LOHS / 320ROHS. CLOSE EDC. START PUMPING AT MINIMUM RATE (0.3BPM). OBSERVE CIRC PRESSURE INCREASING TO 3,704PSI BEFROE RAPIDLY FALLING. GOOD INDICATION FOR WHIPSTOCK BEING SET SUCCESSFULLY. PICK UP AND COME OFF WHIPSTOCK WITHOUT ANY OVERPULL. STOP AND OPEN EDC. MEANWHILE FLOWCHECK WELL - WELL IS STATIC. Printed 5/30/2012 10:12:42AM North America - ALASKA - BP Page 17 ofd- Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148 °40'14.316 "W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:30 - 07:00 2.50 WHIP N DPRB 13,561.00 WEXIT POOH. PUMP AT MAX RATE (3.70BPM) AND POOH AT 80FPM (80% OF FLUID VELOCITY) TO ACHIEVE MAX HOLE CLEANING. 06:50HRS - CALLED AOGCC TO (IVF 24HRS NOTICE OF BOP - TESTING. 06:55HRS - BOB NOBLE OF AOGCC CALLED BACK AND WAIVED WITNESSING TEST. 07:00 - 07:10 0.17 WHIP N DPRB 13,561.00 WEXIT FLOW CHECK FOR 10 MINUTES - STATIC. PJSM FOR LAYING DOWN BHA. 07:10 - 07:30 0.33 WHIP N DPRB 13,561.00 WEXIT LAY DOWN WHIPSTOCK RUNNING TOOLS FROM 67 -FT. 07:30 - 09:00 1.50 STWHIP N DPRB 13,561.00 WEXIT PJSM. PERFORM INSPECTION AND MAINTENANCE ON INJECTOR CHAIN. NO PROBLEMS FOUND. 09:00 - 09:30 0.50 STWHIP N DPRB 13,561.00 WEXIT PJSM. PICKUP AND MAKE UP BHA # 10, MILLING ASSEMBLY WITH BAKER EXTREME MOTOR, DIAMOND STRING MILL AND HCC DSM WINDOW MILL (2.73" NG / 2.74" G). 09:30 - 09:45 0.25 STWHIP N DPRB 13,561.00 WEXIT PRESSURE TEST QUICK TEST SUB TO 250 PSI LOW, 3500 PSI HIGH FOR 5 CHARTED MINUTES EACH - PASSED. 09:45 - 12:50 3.08 STWHIP N DPRB 13,561.00 WEXIT RIH TO 11,355 -FT AT 70 FEET PER MINUTE. 12:50 - 13:30 0.67 STWHIP N DPRB 13,561.00 WEXIT LOG TIE IN AT 100 FEET PER HOUR. UP WEIGHT 35K, DOWN WEIGHT 13K. DEPTH CORRECTION MINUS 8 -FT. CONTINUE IN AND TAG UP ON WHIPSTOCK SLIDE AT 11,478 -FT. 13:30 - 14:00 0.50 STWHIP N DPRB 13,561.00 WEXIT PERFORM SLOW PUMP RATES. PUMP #1 - 1.0 BPM WITH 1729 PSI - 0.5 BPM WITH 1274 PSI PUMP #2 - 1.0 BPM WITH 1644 PSI - 0.5 BPM WITH 1267 PSI 14:00 - 15:10 1.17 STMILL N DPRB 13,561.00 WEXIT BEGIN MILLING OPERATIONS AT 11,476.4FT. TAG UP PINCH POINT AT 11,476.4 -FT. FREE SPIN 2336 PSI, ON BOTTOM 2388 PSI. PUMP AT 1.59 BPM IN 1.61 BPM OUT. MUD WEIGHT IN AND OUT 8.56 PPG. WOB 1.62K. 15:10 - 17:00 1.83 STMILL N DPRB 13,561.00 WEXIT TIME MILL THE FIRST FOOT. PUMPRATE: 1.6BPM, CIRC PRESSURE: — 2,380PSI, WOB: 1.7 - 2.3K LBS. 17:00 - 18:30 1.50 STMILL N DPRB 13,561.00 WEXIT AT 11,479.50FT NOTICE DROP IN WOB FROM —2.8K LBS DOWN TO —1.5K LBS WOB. INTERPRET AS EARLY EXIT OF THE NOSE OUT OF 3- 1/16" ABOUT —2' EARLY). 18:30 - 19:30 1.00 STWHIP N DPRB 13,561.00 WEXIT START TIME MILLING AGAIN FOR LAST 1.5FT OF WINDOW TO AVOID CREATING A LIP. 19:30 - 23:20 3.83 STWHIP N DPRB 13,561.00 WEXIT STRING MILL SHOULD BE OUT NOW. START MILLING RAT HOLE. NOTE SLOW PROGRESS WHEN MILLING FORMATION AT —3FT / HR. PUMPRATE: 1.6BPM, CIRC PRESSURE: —2,450PSI, WOB: —2K LBS. IA = 563PSI / OA = 442PS1. 23:20 - 23:40 0.33 STWHIP N DPRB 13,561.00 WEXIT COMPLETE 10' RAT HOLE. START FIRST UPWARDS REAMING PASS TO 11,473'. Printed 5/30/2012 10:12:42AM 1-` North America - ALASKA - BP Page 18 oPlg Operation Summary Report Common Well Name: C -12 AFE No Event Type: RE-ENTER- ONSHORE (RON) Start Date: 5/4/2012 End Date: X3 -011 K1 -C (2,117,744.00 ) Project: Prudhoe Bay Site: PB C Pad Rig Name /No.: NORDIC 1 Spud Date/Time: 11/14/1979 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: / Lat: 070 °17'55.857 "7 Long: 0148°40'14.316'W Active Datum: ORIG KELLY BUSHING @62.90ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 23:40 - 00:00 0.33 STWHIP N DPRB 13,561.00 WEXIT RIH AND NOTICE OBSTRUCTION. AT 11,477.6' START MILLING WITH — 140PSI MOTORWORKAT 2,330PSI FREE SPIN AND 2.24K LBS WOB. AT 11,478.2' NOTICE RAPID DROP IN WOB DOWN TO 0.56K LBS. NO FURTHER INDICATION FOR ANY OBSTRUCTION NOTICED. IT APPEARS SMALL PIECE OF FORMATION GOT CAUGHT BETWEEN MILL AND REAMER. 5/18/2012 00:00 - 01:45 1.75 STWHIP N DPRB 13,561.00 WEXIT PERFORM THREE UP AND DOWN REAMING PASSE BETWEEN 11,482' TO 11,474' AT 1FT /MIN. NO INDICATION FOR ANY OBSTRUCTION. 01:45 - 02:00 0.25 STWHIP N DPRB 13,561.00 WEXIT PERFORM LAST REAMING PASS FROM 11,485' TO 11,470'. SHUT OFF PUMPS AND DRY DRIFT DOWN TO 11,488'. SMOOTH, NO OBSTRUCTION NOTICED. FLOWCHECK WELL - WELL IS STATIC AND OPEN EDC. 02:00 - 04:30 2.50 STWHIP N DPRB 13,561.00 WEXIT COMMENCE POOH. AT 75FT /MIN, PUMPING AT MAX RATE OF 3.7BPM. 04:30 - 04:45 0.25 STWHIP N DPRB 13,561.00 WEXIT PULL TO 200FT AND FLOWCHECK WELL. WELL STATIC. HOLD PJSM BEFORE LAYING DOWN BHA. 04:45 - 05:00 0.25 STWHIP N DPRB 13,561.00 WEXIT PICK UP TO 100' AND POP OFF INJECTOR. * ** PERFORMED KICK WHILE TRIPPING DRILL WHEN BREAKING OFF INJECTOR * ** INJECTOR WAS MOVED TO SIDE AND SECURED, X -OVER INSTALLED AND TIGHTENED UP AND 2 -3/8" SAFETY JOINT INSTALLED WITHIN <3MINS. NON - ESSENTIAL PERSONNEL LEFT RIGFLOOR AND MOTOR MAN MUSTERED AS REQUIRED AT KOOMEY. CREW SHOWS EXCELLENT PERFORMANCE DURING COMPLEX DRILL WHICH IS VERY RARELY CONDUCTED. 05:00 - 05:30 0.50 STWHIP N DPRB 13,561.00 WEXIT BLOW DOWN AND LAY DOWN BHA. GAUGE BIT AND NOTICE 2.73" GO / 2.72" NO -GO. MAKE UP 5' STINGER AND JETTING NOZZLE. 05:30 - 08:00 2.50 STWHIP N DPRB 13,561.00 WEXIT STAB ON INJECTOR. CLOSE MASTER VALVE WITH 33 -3/4 TURNS. ATTEMPT TO TEST MASTER WITH BLEED OFF OBSERVED. ATTEMPT SEVERAL TIMES WITH NO SUCCESS. STAND BACK INJECTOR. MAKE UP QUICK TEST SUB NIGHT CAP. PRESSURE TEST MASTER VALVE TO 250 PSI LOW, 3500 PSI HIGH FOR 5 CHARTED MINUTES EACH - PASS. CLOSE SWAB WITH 33 -3/4 TURNS AND PRESSURE TEST TO 250 PSI LOW, 3500 PSI HIGH FOR 5 CHARTED MINUTES EACH - PASS. 08:00 - 09:15 1.25 STWHIP N DPRB 13,561.00 WEXIT WASH OUT STACK WITH JETTING TOOL AT 2 BPM WITH 2615 PSI. Printed 5/30/2012 10:12:42AM TREE HEAD 6 X7 MC • SA NOTES: WELL ANGLE > 70° ( 11925'. ' ACTUATOR = BAKER C C -1 2 B C -12 TD DEPTHS ARE ELMD ORIG KB. ELEV 62.94' ORIG BF. ELEV 32.24' ORIG KOP= 2300' Max Angle = 93° @,12170' 2004' 1 OTIS SSSVN, ID = 5.962" Datum MD = 11663 Datum TVD = 8800' SS 2564' — 19 - 5/8" DV PKR 13 -3/8" CSG, 72 #, L -80, ID = 12.347" 2681' I H Minimum ID = 2.70" @ 10354' MILLED SELRT BUSHING 7" TBG, 26#, L -80, U4S,.0383bpf, ID = 6.276" H 10278' { 10278' HT' 20' P8R 10298' —19-5/8" x 7' GUIBERSON PKR, ID = 3.833" = _ 1034 - 14-1r2" OTIS X NIP, ID 3. 813" 10338' --I ELMD X NIP (CTD ST) 10344' — 13 - 1/2" DEPLOYMENT SLEEVE, ID= 3.00" ' 10376' — 4-1/2" XN NIP, ID -= 3.80" I MILLED XX/XX/XX (BEHIND PIPE) I3 -112 LNR, 9.3 #, L -80, STL, .0087bpf , ID = 2.992" —1 10395' �\ 10402' — I9 -5/8" X 7" BOT LNR HGR, ID = ? ?? 4-1/2" TBG, 12.6 #, L -80, HY D,.0152bpf , ID = 3.958" —I 10438' {---/ \ I 10396' H3.1 /2' x 3.3/16" XO, ID = 2.80" 10438' —14-1/2' WLEG, ID = 3.958" I 10433' I-1 ELMD TT LOGGED ON XX/XX/XX I9 -5/8" CSG, 47 #, L -80, ID = 3.958" H 10957' I a • MIL LOUT WINDOW (C -12B): 11381' - 11389' 7" LNR, 29 #, L -80, ID = 6.184" —1 11381' 111700' ELMD H3 -3/16" CIBP (04/27/12) 3- 3/16" LNR, 6.2 #, L -80, TCII, .0076bpf, ID = 2.80" — 12257' 11948' -3 -3/2' CIBP (03/10/11) I 12258' —13- 3/16" x 2 -7/8" X0, ID = 2.377" PERFORATION SUMMARY REF LOG: SLB MCNL 09/19/09 ANGLE AT TOP FERF: ° @ 11770' Note: Refer to Reduction DB for historical perf data SIZE SFF INTERVAL Opn/Sgz DATE 2" 6 11770 - 11775 C 04/29/11 2" 6 12010 - 12170 C 09/20/09 2" 6 12270 - 12950 C 09/20/09 PBTD H 12964' I 2 -7/8" LNR, 6 16 #, L -80, STL, .0058bpf, ID = 2.441" H 13004' DATE REV BY COMMENTS DATE REV BY I COMMENTS I I PRUDHOE BAY UNIT 12120179 ORIGINAL COMPLETION 05/12/11 JNL /PJC CIBPCORRECTION WELL: C -128 07/20/98 WHITLOW CID SIDETRACK (C -12A) 05/01/12 TTR/JMD SET 3 -3/16" CIBP (04/27/12) PERMIT No: 2090850 09/21 /09 NORDIC2 CT D SIDETRACK (C-12B) 05/01 /12 TTR/JMD CORRECTED MIN ID (04 /27/12) API No; 50 -029- 20387 -02 11/09/09 DJ /SV DRAFT FINAL 05/01/12 JMD ADDED PERFS & WELL ANGLE SEC 19, T11 N, R14E, 555' SNL & 1221' WEL 03/11/11 HJW /PJC SET CIBP (03/10/11) 05/10/12 DJF /JMD TREE C/O (05/05/10) 05/10/11 RRD/ PJC ADFERF (4/29/11) { BP Exploration (Alaska) C -12B Page 1 of 2 Schwartz, Guy L (DOA) From: Jakabosky, Troy [Troy.Jakabosky @bp.com] Sent: Friday, March 09, 2012 8:33 AM To: Schwartz, Guy L (DOA)� _ L; i, ) ' Subject: C -12B sundry L en) Guy - the pre -rig work called for a 2500 psi test(step 5), after setting the 3 -3/16 CIBP at 11,700' MD.. I would like to change the Pressure test on the CIBP to 1000 psi(30 min chart), to check that we have a good set. Please let me know if this is acceptable? Thanks, Troy Troy Jakabosky F :/1,112. BP Drilling Engineer ; ^ Anchorage, AK 99508 Phone 907.564.4868 CeII 907.632.2609 From: Schwartz, Guy L (DOA) [ mailto:guy.schwartz @alaska.gov] Sent: Monday, February 27, 2012 1:59 PM To: Jakabosky, Troy Subject: RE: C -12B OK.. I will change the depths to 11700' and on the sundry request. No need to re- submit the paperwork. Regards, Guy Schwartz Senior Petroleum Engineer AOGCC 793 -1226 (office) 444 -3433 (cell) From: Jakabosky, Troy [mailto:Troy.Jakabosky @bp.com] Sent: Monday, February 27, 2012 1:31 PM To: Schwartz, Guy L (DOA) Subject: C -12B Guy - I looked at the well servive report for C -12B. It agrees with the schematic for existing perfs. We will set the CIBP at 11,700 MD. I 3/9/2012 C -12B • • Page 2 of 2 Thanks, Troy. Troy Jakabosky BP Drilling Engineer Anchorage, AK 99508 Phone 907.564.4868 Cell 907.632.2609 3/9/2012 7r ti E h La\ MIKA r j 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 McMullen Engineering Team Leader BP Exploration (Alaska), Inc. P.O.Box196612 ac) C - Anchorage, AK 99519 -6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU C -12B Sundry Number: 312 -069 Dear Mr. McMullen: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for reconsideration. A request for reconsideration is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. Sincerely, Daniel T. Seamount, Jr. Chair DATED this_ day of February, 2012. Encl. r • r c (i,f1 AV " STATE OF ALASKA 1 • 0 ALASKA OIL AND GAS CONSERVATION COMMISS N `TCE'VE® Q/ APPLICATION FOR SUNDRY APPRO AL 20 AAC 25.280 FEB 2 3 2012 1. Type of Request: ❑ Abandon Plug for Redrill , ❑ Perforate New Pool ❑ Repair Well ❑ an a Approved Program ❑ Suspend ❑ Plug Perforations ❑ Perforate ❑ Pull Tubing ❑ Tmet i tiKsgli & Gas Cons. Commission i ❑ Operations Shutdown ❑ Re -Enter Suspended Well ❑ Stimulate ❑ Alter Casing ❑ Other Anchorage 2. Operator Name: 4. Current Well Class: 5. Permit To Drill Number BP Exploration (Alaska) Inc. Z Development ❑ Exploratory 209 - 085' 3. Address: ❑ Service ❑ Stratigraphic 6. API Number: P.O. Box 196612, Anchorage, Alaska 99519 - 6612 50 029 - 20387 - 02 - 00 7. If perforating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: PBU C -12B Spacing Exception Required? ❑ Yes 0 No 9. Property Designation: 10. Field / Pool(s): ADL 028305 Prudhoe Bay Field / Prudhoe Bay Oil Pool - 11. PRESENT WELL CONDITION SUMMARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): Plugs (measured): Junk (measured): 13004' - 9018' 12962' - 9018' None None Casing Length Size MD TVD Burst Collapse Structural Conductor 110' 20" x 30" 110' 110' Surface 2681' 13 -3/8" 2681' 2662' 4930 2670 Intermediate 10957' 9 -5/8" 10957' 8287' 6870 4760 Production Liner 979' 7" 10402' - 11381' 7872' - 8599' 7240 5410 Liner 2660' 3 - 1/2" x 3 - 3/16" x 2 - 7/8" 10344' - 13004' 7826' - 9018' Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): 11770' - 12950' 8931' - 9018' 7" 26# / 4-1/2" 12.6# L -80 10438 Packers and SSSV Type: 9 -5/8" x 4 -12 ", Guiberson packer Packers and SSSV 10298' / 7790' MD (ft) and TVD (ft): 12. Attachments: 13. Well Class after proposed work: ® Description Summary of Proposal ® BOP Sketch ❑ Detailed Operations Program ❑ Exploratory - ® Development ❑ Service 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: March 1, 2012 ❑ Oil ❑ WINJ ❑ WDSPL ❑ Plugged 16. Verbal Approval: Date: ❑ Gas ❑ GINJ ❑ GSTOR ❑ Abandoned Commission Representative: ❑ WAG ❑ SPLUG - ® Suspended 17. I hereby certify tha r - foregoing i tru - and correct to the best of my knowledge. Contact Troy Jakabsky, 564 -4868 Printed Name f o b 1 1 Title Engineering Team Leader Prepared By Name /Number: Signat e Phone 564 - 4711 Date 23/2__. . Joe Lastufka, 564 -4091 Commission Use Only Conditions of approval: No 'fy Commission so that a representative may witness . ���� Sundry Number: ❑ Plug Integrity WkP Test ❑ Mechanical Integrity Test ❑ Location Clearance 3606 e s-..., frE G31 1 Other: z j AA Z S - 7 /Z CLJ 0 ,4/1." . rot / lets e- ,.... -' 7 Pm Subsequent Form Required: `b , Yo Z ► APPROVED BY 1 ll Approve. B / : , E CO COMMISSIONER THE Date Ze Form 10 t' ' C1 �1 �pA 0 R 1 6 1 A , A + , y Submit In Duplicate t 1 9 • • To: Alaska Oil & Gas Conservation Commission From: Troy Jakabosky CTD Engineer bP Date: February 21, 2012 Re: C -12B Sundry Approval Sundry approval is requested to abandon existing perforations on well C -12C in preparation for a Coiled Tubing Drilling Sidetrack. C -12B is a CST completed in Sept 2009 in Zone 2A above the MHO /HOT. 840' of perforations were initially shot, and the well came on very strong with -6200 bopd and 30 MMscfd. Unfortunately, the production decline was steeper than anticipated. Within 3 months it reached marginal GOR and was shut -in. After a 6 month shut -in period, C -12B was POP'ed in July 2010 and showed some healing but was shut -in for high GOR within a couple weeks. Two more attempts were made to cycle the well, but it showed minimal healing. In March 2011, a PPROF /MCNL /Borax job was logged. Based on the logging results, a CIBP was set at 1 948 to isolate the Zone 2A lateral and 5' of perfs were added in a Zone 2B oil lens (11770 -75'). Operations attempted to POP the well several times by backflowing but was unsuccessful. Gas lifting C -12B is not possible because the tubing does not have GLMs. C -12B is currently shut -in. Reason for Sidetrack: C -12B is no longer a competitive producer, and there are no remaining wellwork options. - The proposed sidetrack will access reserves in a -40 acre target (Z1 B /2A HOT play) in southeastern C -pad. The well is in sound mechanical condition. It passed an MIT -IA to 2000 psi (Guiberson Production packer) - (October 2011) and the MIT -OA passed to 2000 psi (October 2011). The PPPOT -T passed to 5000 psi (October 2011) and the PPPOT -IC failed to 3500 psi (June 2006), but the well is still considered operable since there is a passing MIT -IA. The sidetrack, C -12C, is scheduled to be drilled by Nordic 1 starting on April 7' 2012 targeting lvishak Zone 1B/2A. The pre rig work includes setting a bridge plug and whipstock wit - The coiled tubing drilling rig )- Nordic 1 will then mill the window in Z2C, followed by landing an n ling the planned 2,400' lateral in Zn 1 B /2A lateral via 12 DLS. The well will be completed with 2 -3/8" solid, cemented, and perforated liner. The following describes the planned work. A schematic diagram of the proposed sidetrack is attached for reference. r1 a ;1--1/- 6 60o s r 1 44F 6°e 41/1 �,„ 4'14 �f COnGv�. l � mil/ Came On w,' 6 0 war o - r �"000d s /4, farted �►1`ref/i q 2 Aoh i yf t `` f 1 Iii A i s �,' ICa9'�/l/ ' 04 frccf,, p /4 -$ 11 Qw IoC f 4' r ' , wf 1 ave o /? vcr 7 � �!J wett ro ' fo,p, Of r e 1 • • Z-7 CTD Sidetrack Summary Pre -CT Rig Work: The pre CTD work is planned to begin March 1, 2012. 1. W Check tubing hanger LDS. 2. W PPPOT -T to 5000 psi 3. D MIT -IA to 2000 psi, MIT -OA to 2000 psi. 4. S Drift for 3 -3/16 CIBP to 11,940 MD. -� p3 5. S set 3- 3/16" CIBP at ,1.1-900 PT to 2500 psi. - U 6. S Run Dummy Whipstock Drift down to 11,700 MD. r l 70o 9 7. E Set 3- 3/16" Monobore Whipstock at 11,625MD at 276 ROHS. 8. V PT tree (MV,SV,WV) 9. 0 Bleed production flow lines and GL lines down to zero and blind flange. 10. 0 Remove wellhouse, and level pad. 11. V Set TWC (CIW 6 -3/8 type J) -24 hrs prior to rig arrival ' Rig Sidetrack Operations: (Scheduled to begin on April 7 2012 using Nordic Rig 1) 1. MIRU 3 sco e"-is ��,•� 2. NU 7- 1/16" CT Drilling BOPE and test 3. Mill 2.75" single string window in the 3- 3/16" liner at 11625'. 4. Drill Build: 3" bi- center bit 457 ft ( 35 °/100 planned) to 12,102 MD 5. Drill Lateral 3" bi- center bit 1,898 ft(12 °/100) in Zone 1 B /2A to a final TD of 14,000' MD. 6. Run and cement 2 -3/8" L -80 liner leaving TOLlTOC @10,380 ft. 7. Perform cleanout/log run with mill, motor. 8. MCNL run. 9. Perforate well ( -500' planned) G' 10. Freeze protect well to 2500' MD. 11. Set BPV. ND 7- 1/16" BOPE stack. Freeze protect tree and PT tree cap to 3500 psi. 12. RDMO 1. Post -Rig Work:' 2. Pull BPV. 3. Run 4 -1/2" liner top packer if needed, and test to 2,400 psi. 4. CT N2 lift 5. ASRC welltest and flowback Troy Jakabosky Coiled Tubing Drilling Engineer 564 -4868 CC: Well File Sondra Stewman/Terrie Hubble 2 TREE ciW I WELLHEAD = FMC SES: C -12B CTD DEPTHS ARE ELMD ACTUATOR = OTIS C-12B ORIG KB. ELEV = 62.94' ORIG BF. ELEV = 32.24' ORIG KOP = 2300' Max Angle = 93° @ 12170' 1 2004' H7" OTIS SSSVN, ID = 5.962" I Datum MD = 11663 • Datum TVD = 8800' SS 2564' H9-5/8" DV PKR I 113 -3/8" CSG, 72 #, L -80, ID = 12.347" 1-I 2681 Minimum ID = 2.30" @ 10354' MILLED SELRT BUSHING 7" TBG, 26 #, L -80, U4S,.0383bpf, ID = 6.276" H 10278' I L 10278' I 1 7" 20' PBR I I 10298' H9-5/8" x 7" GUIBERSON PKR, ID = 3.833" I 10345'J -14 -1/2" OTIS X NIP, ID = 3.813" 1 1 R 10338' I-I ELMD X NIP (CTD ST) 1 • 10344' I-13-1/2" DEPLOYMENT SLEEVE, ID = 3.00" ( ' 1 10376' I- 4-1/2" XN NIP, ID -= 3.80" MILLED XX/XX/XX (BEHIND PIPE) I3 -1/2" LNR, 9.3 #, L -80, STL, .0087bpf, ID = 2.992" H 10395' I - 10402' I-I TOP OF 7" BKR LNR HGR I 14-1/2" TBG, 12.6 #, L -80, HYD,.0152bpf, ID = 3.958" I 10438' I 10396' H3 -1/2" x 3 -3/16" XO, ID = 2.80" I 10438' H4 -1/2" WLEG I ( 10433' I-I ELMD TT LOGGED I 19-5/8" CSG, 47 #, L -80, ID = 3.958" I 10957' I-- MILLOUT WINDOW (C -12B): 11381' - 11389' 17" LNR, 29 #, L -80, ID = 6.184" H 11381' I I 3- 3/16" LNR, 6.2 #, L -80, TCII, .0076bpf, ID = 2.80" I 12257' a 11948' 1-13-3/2" CIBP (03/10/11) I • 122 - 3 -3/16" x 2 -7/8" XO, ID = 2.377" PERFORATION SUMMARY REF LOG: SLB MCNL 09/19/09 ANGLE ATTOPPERF: ° @ 11770' Note: Refer to Production DB for historical pert data SIZE SPF INTERVAL Opn /Sqz DATE 2" 6 12010 - 12170 C 09/20/09 2" 6 12270 - 12950 C 09/20/09 2" 6 11770 - 11775 0 04/29/11 I PBTD H 12964' 1 141 12-7/8" LNR, 6.16 #, L -80, STL, .0058bpf, ID = 2.441" I 13004' 1 '' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 12/20/79 ORIGINAL COMPLETION 05/12/11 JNL /PJC CIBP CORRECTION WELL: C-12B 07/20/98 WHITLOW CTD SIDETRACK (C -12A) PERMIT No: 2090850 09/21/09 NORDIC2 CTD SIDETRACK (C -12B) API No: 50- 029 - 20387 -02 11/09/09 DJ /SV DRAFT FINAL SEC 19, T11 N, R14E, 555' SNL & 1221' WEL 03/11/11 HJW /PJC SET CIBP (03/10/11) 05/10/11 RRD/ PJC ADPERF (4/29/11) BP Exploration (Alas ka) NORDIC - CALISTA RIG 1 CHOKE / REEL /CIRCULATION MANIFOLD DIAGRAM - - V12 ,,,{irsri V,4 7 -1/16" 5000 psi BOP's ID = 7.06" V15 V11 ' I11116" 5000 psi, R %de Transducers 0 i ' I I 14 V V2 I V, V 16 -- ' -- Note: typical aOP ar rangemerrt Nr gala" wiled tubin drill - - ._..- _ -.. I 11/16• sew par, RXd6 rill V17 , i HCR ICI IC �' IK OK .4 , , z To Poor Boy Gas Buster ,,,,, e:"."*. 1W, 11 ,qp i p, ' • 2 ins 6000 psi, RX -24 I 100' 6000 psi HCR — .... 3- 1118'6000 CHECK • M® VALVE Manual Choke UP— _ _ . _ _ _ . '. 11/16 cam« m on FOVO Valve x 6000 psi M Ma li MEOH /Diesel FP Line _ _ CoFlex Hose . =. Mot on 1/4 Turn Halco r r r 10WOG To Production Tree or Cross Over • T pr- - re transducers ! i Ground CoFlez Hose CV11 41) I" CV12 To Coiled Tubing Bleed Off Inner Reel Valve w _ [ — i CV13 F{ Cement Line l In LeveTie -In I — _ — CV10 -i CV3 CV2 / T Stand Pipe — _ _T_ -- — _ _ _ _ _ Manual Choke __ _ _ — _ _ Pressure Transducers I 1 Mo0on // -I r ( ] _ I 1 CV9 CV17 1, • /EL dam Inn AIM. 4111 CV, I I I Y cv6 I e,.r.• Tiger Tank • • Mud Pump 2 a r • — _ Ash = In From _ Baker MP , 8 Mp 2 O ■ ► • — I Choke _ lib --------- --• CV14 to Pits = Rig Floor Mud Pump #1 0CV16 Reverse Cir -' r t lir Cir CTw le ••• . MM • • To Manifold CV15 1- Jun -2010 RPVprxn Circulation line I CT while O014 CoFlez Hose TREE= CM/ • WELLHEAD = FMC C 1 2 B SAFETY FOES: C-12B CTD DEPTHS ARE ELMD I ACTUATOR = 0T1S ORIG KB. ELEV —= 62.94' CTD Pre ' ORIG BF. ELEV = 32.24' - - ORIG KOP = ^ 2300' Max Angle = 93° @ 12170' 1 2004' I—17" OTIS SSSVN, ID = 5.962" 1 Datum MD = 11663 O Datum TVD = 8800' SS 2564' 1 -19 -5/8" DV PKR 1 113-3/8" CSG, 72#, L -80, ID = 12.347" H 2681' Minimum ID = 2.3" @ 10354' Milled SELRT Bushing 17" TBG, 26#, L -80, IJ4S,.0383bpf, ID = 6.276" H 10278' I ( 10278' I--17" 20' PBR I 10298' I I9 -5/8" x 7" GUIBERSON PKR, ID = 3.833" 10345' H4-1/2" OTIS X NIP, ID = 3.813" I I _ 10338' J -I ELMD X NF (CTD ST) 1 r ■ � i 10344' H3-1/2" DEPLOYMENT SLEEVE, ID = 3.00" 1 ' 1 J 10376' 1 4-1/2" XN NIP, ID -= 3.80" MILLED XX/XX/XX (BEHIND PIPE) 13 -1/2" LNR, 9.3#, L -80, STL, .00B7bpf, ID = 2.992" I-I 10395' I 10402' I-1TOP OF 7" BKR LNR HGR I 14-1/2" TBG, 12.6#, L -80, HY D,.0152bpf, ID = 3.958" H 10438' I / �� 10396' 1-13-1/2" x 3 -3/16" XO, ID = 2.80" I 10438' 1-14-1 /2" wLEG I I 10433' --I ELMD TT LOGGED 19 -5/8" CSG, 47 #, L -80, ID = 3.958" IH 10957' I • , IT' LNR, 29#, L -80. D = 6.184" H 11381' I 3- 3/16" monobore WS (pre -rig) @ 11,625' 276° ROHS- - - - - -- CIBP to abandon perfs (pre -rig) @ 11 900' 24° ; 13- 3/16" LNR, 6.2#, L -80, TCII, .0076bpf, ID = 2.80" I 12257' B 11918' 3 -3/2" CIBP (03/10!11) I 12258' -J3- 3/16" x 2 -7/8" XO, ID = 2.377" 1 PERFORATION SUMMARY REF LOG: SLB MCNL 09/19/09 ANGLE AT TOP PERF: ° @ 11770' Note: Refer to Production DB for historical perf data MILLOUT WINDOW (C -12B): 11381' - 11389' SIZE SPF INTERVAL Opn /Sqz DATE 7' 6 12010 - 12170 C 09/20/09 2" 6 12270 - 12950 C 09/20/09 2" 6 11770 - 11775 0 04129/11 I PBTD H 12964' I • 1• 12 -7/8" LNR, 6.16#, L -80, STL, .0058bpf, ID = 2.441" H '13004' I VA DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 12/20/79 " ORIGINAL COMPLETION 05 /12/11 JNUPJC CIBP CORRECTION WELL: `- 07/20/98 iNHITLOVI CTD SIDETRACK (C -12A) „lroposed CTD sidetrack PERMIT No: 2090850 09/21/09 NORDIC2 CTD SIDETRACK (C -12B) API No: 50- 029 - 20387 -02 11/09/09 DJ /SV DRAFT FINAL SEC 19, T11 N, R14E, 555' SNL & 1221' VVEL 03/11/11 HJW /PJC SET CIBP (03/10/11) 05/10/11 RRD/ PJC ADPERF (4/29/11) BP Exploration (Alaska) FREE = CW • NELLHEAD = FMC SAFETY WES: C - 12B CTD DEPTHS ARE ELMD I ACTUATOR = OTIS DRIG KB. ELEV 62.94' proposed CTD sidetrack DRIG BF. ELEV 32.24' - DRIG KOP= 2300' dux Angle = 3° @ 12170' 2004' H 7" OTIS SSSVN, D = 5.962" I Datum MD = 11663 O Datum TVD = 8800' SS 2564' —19-5/8" DV PKR 113 -3/8" CSG, 72#, L -80, ID = 12.347" H 2681' —A Minimum ID = 1.78" @ 10380' 3" Deployment Sleeve 17" TBG, 26#, L -80, IJ4S,.0383bpf, ID = 6.276" H 10278' .I I 10278' H7" 20' PBR L I 10298' 1-19-5/8" x 7" GUIBERSON PKR, ID = 3.833" L 10345' — I4 -1/2" OTIS X NIP, ID = 3.813" I 1 10338' H ELMD x NP (CTD ST) TSGR = 11,174' MD BCGL = 11,594' MD I I 10344' H3 -1/2" DEPLOYMENT SLEEVE, D= 3.00" 38 I I 10376' 4 -1/2" XN NIP, ID -= 3.80" Top of 2 -3/8" liner @ -10 380 n MILLED XX/XX/XX (BEHIND PIPE) 13-1/2" LNR, 9.3#, L -80, STL, 0087bpf, ID = 2 992" H 10395' 1 10402' H TOP OF 7" BKR LNR HGR I I4 -1/2" TBG, 12.6#, L -80, HYD,.0152bpf, D = 3.958" H 10438' / I I 10396' H3 -1/2" x 3- 3/16" XO, ID = 2.80" I 10438' — 14 -1/2" WLEG 1 I 10433' H ELMD TT LOGGED 1 11 I I 9 -5/8" CSG, 47 #, L -80, D= 3.958" H 10957' I I • 7" LNR, 29#, L -80, ID = 6.184" H 11381' I-- ' 2 -3/8" liner with TD @ 14,000' 3- 3/16" monobore WS (pre -rig) @ 11,625' (................ ' - -__ _� o _ CIBP to abandon perfs (pre -rig) @ .1.1,9817r::: 2 4 3- 3/16" LNR, 6.2#, L -80, TCII, .0076bpf, D = 2.80" — 12257' Fa a 11948' �3 -3/2" CIBP (03/10/11) • PERFORATION SUMMARY 12258' 3- 3/16" x 2 -7/8" XO, ID = 2.377" REF LOG: SLB MCNL 09/19/09 ANGLE AT TOP PERF: ° @ 11770' Note: Refer to Roduction DB for historical pert data SIZE SPF INTERVAL Opn /Sqz DATE MILLOUT WINDOW (C -12B): 11381' - 11389' 2" 6 12010 - 12170 C 09/20/09 2" 6 12270 - 12950 C 09/20/09 2" I 6 11770 - 11775 I 0 1 04/29/11 PBTD H 12964' 2 -7/8" LNR, 6.16#, L -80, STL, .0058bpf, ID = 2.441" IH 13004' ki DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 12/20/79 ORIGINAL COMPLETION 05/12/11 JNL/PJC CIBP CORRECTION WELL: 07/20/98 WHITLOW CTD SIDETRACK (C -12A) WJH proposed CTD sidetrack PERMIT No: 2090850 09/21/09 NORDIC2 CTD SIDETRACK (C -12B) API No: 50- 029 - 20387 -02 11/09/09 DJ /SV DRAFT FINAL SEC 19, T11 N, R14E, 555' SNL & 1221' WEL 03/11 /11 FIJW /PJC SET CIBP (03 /10/11) 05/10/11 RRD/ PJC ADPERF (4/29 /11) BP Exploration (Alaska) • gyro/da?a Gyrodata Incorporated 23000 Northwest Lake Dr. Houston,TX 77095 (832)349-7000 Fax:(832)349-7001 SCANNED MAR 1 2202 b00291-03't? 02,00 2.O�.o'PSj SuRvtY KtNUK I �1�`���"I! BP Exploration Drill Site: Wellhead; Well C-12B, 4 '/2" tubing North Slope Borough, AK AK1111 GCM210 04 November, 2011 Serving the Worldwide Energy Industry with Precision Survey Instrumentation • gyro/da?a Gyrodata Incorporated 23000 Northwest Lake Dr. Houston,TX 77095 (832)349-7000 Fax.(832)349-7001 November 10, 2011 State of Alaska - AOGCC Attn: Christine Mahnken 333 W. 7th Ave, Suite 100 Anchorage, Alaska 99501 Re: Drill Site: Wellhead; Well C-12B, 4 1/a" tubing North Slope Borough, AK Enclosed,please find two (2) copies, and one (1) disk of the completed survey for the above referenced well. We would like to take this opportunity to thank you for using Gyrodata, and we look forward to serving you in the future. 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Z m OJ Z -O (-Ni U • N (9 "'__ 1-1 .., O O Y _.. —O Z < - _ *-1 o • ,.it - —O O ,4` 0 O O42 00 ...-'' = I- d O W 7-2 0 0 00 LU j 0 (1) O Q O cWc 0 _0 O In • a O (0 1 0 I — d- m , Q �':, � 0) O — O 0 Q • 0 O _ 0 O U) M I • - - L O o ,-i Z 0 Ct -0 N C0 rp N 0 r ,--i - 0 o N o • U 0 U ,-I 0 C O O a �• (t) I I I I I 1 I 1 I I 1 I I I I I I r ,4i-o ,p > 0 00 N 00 In 0 to 0 (TOOT/b@P) AJI2i]A S DJ100a • • > -I(UU w • O > � � —O D L. o ~ _ o1.0 �1 13 C9 LL. CU LU C p .. a) 0 Oz ,-i - O CO Lf)a O Imo- ,-i - "t Oop 1 Z '-1 ,,__I - 0 > O O Y `0 Z Q - 0 O O in - M - O 0 0 - M a-+ w - O 0 in Ur N ,_. I- - U) - Q W - O 0 0 - N - 0 O ,--I (D U) - O _O Q 0 C c fl - E O F- O N t —O — z - to d' Co Ti N - N L 2• U � —O U -0 C I 1 1 1 1 1 1 1 1 1 1 1 1 1111 1111 1 1 1 1 1 1 1 1 1111 I I I- p O 1 I I I I 1 I I 1 L - 4+-J 0 0 0 0 0 0 0 0 0 d To (Q 0 O O O O O O O a U in O Lf) 0 Lf) O In O CO J ' r-I r-1 N N M co 7r OA DNIH12ION • Survey QC - RGS-CtSpecification Sheetl i atat SURVEY QUALITY CONTROL - SPECIFICATION DATA PRE-JOB CALIBRATION VERIFICATION CHECK (ROLL TEST) Station ToolFace Gravity Error Scale Factor Rate Error (deg) (Mg) Uncertainty (deg/min) 64 269.79 -533.40 -0.00013335 -7.87 63 269.79 -544.77 -0.00013619 -7.05 62 224.86 -501.75 -0.00012544 -26.30 61 224.86 -470.16 -0.00011755 -19.55 60 45.80 -483.53 -0.00012089 -10.67 1 59 45.80 -486.97 -0.00012175 -8.48 58 1.08 -131.32 -0.00003279 -11.34 57 1.08 -131.29 -0.00003278 -12.44 56 329.75 -99.71 -0.00002489 -7.42 55 329.75 -99.51 -0.00002484 -10.35 54 300.03 -318.05 -0.00007943 -7.52 53 300.03 -319.86 -0.00007988 -5.46 52 270.68 -523.59 -0.00013089 -5.71 51 270.68 -520.31 -0.00013008 -9.17 50 238.38 -546.40 -0.00013664 -1.49 49 238.38 -546.29 -0.00013661 -0.19 48 210.33 -368.61 -0.00009212 -1.36 47 210.34 -369.17 -0.00009226 -3.24 46 180.89 -137.13 -0.00003424 -5.11 45 180.89 -142.67 -0.00003562 -4.64 44 149.08 -104.71 -0.00002613 -3.65 43 149.08 -91.95 -0.00002295 -9.53 42 118.80 -298.21 -0.00007449 -3.04 41 118.80 -293.61 -0.00007334 -3.48 40 90.37 -507.45 -0.00012687 -3.13 39 90.37 -508.50 -0.00012713 -3.57 38 60.51 -549.41 -0.00013740 -6.99 37 60.51 -542.19 -0.00013559 -6.72 36 30.68 -370.54 -0.00009260 -12.82 35 30.68 -376.54 -0.00009410 -12.19 34 358.50 -139.71 -0.00003488 -17.57 33 358.50 -129.22 -0.00003226 -23.35 32 270.63 -495.84 -0.00012396 -6.08 31 270.63 -492.50 -0.00012313 -6.78 30 223.68 -462.49 -0.00011563 -7.76 29 223.68 -464.45 -0.00011612 -11.74 28 44.75 -470.97 -0.00011775 -6.66 27 44.75 -475.87 -0.00011897 -7.11 26 0.21 -138.17 -0.00003450 -7.62 25 0.21 -137.96 -0.00003444 -8.89 24 329.22 -101.58 -0.00002535 -7.63 23 329.21 -108.78 -0.00002715 -8.22 22 300.12 -281.87 -0.00007040 -7.71 21 300.12 -280.52 -0.00007007 -6.26 20 269.18 -489.31 -0.00012234 -5.24 19 269.18 -486.94 -0.00012175 -6.84 18 239.78 -532.02 -0.00013305 -0.89 17 239.79 -527.15 -0.00013184 -3.79 16 209.62 -347.59 -0.00008687 -2.57 15 209.62 -351.51 -0.00008785 -1.87 14 179.51 -146.19 -0.00003650 -1.15 13 179.51 -147.65 -0.00003686 -1.02 12 151.33 -97.97 -0.00002445 -1.42 11 151.33 -101.47 -0.00002533 0.87 10 121.86 -256.16 -0.00006398 -2.32 9 121.86 -258.03 -0.00006445 -2.37 8 90.52 -460.76 -0.00011520 -4.73 7 90.53 -454.21 -0.00011357 -5.43 6 61.52 -510.34 -0.00012764 -3.49 5 61.52 -518.43 -0.00012966 -4.00 4 31.93 -419.35 -0.00010480 -6.39 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 1 of 12 AK1111GCM210 • Survey QC - RGS-Specification Sheet gym/data 3 31.93 -420.19 -0.00010501 -5.26 2 358.83 124.52 0.00003110 -3.82 1 358.83 103.05 0.00002574 -4.64 MBO = -0.18 Gravity Error= -334.30 Scale Factor Uncertainty = -0.00008356 Rate Error = -6.72 POST-JOB CALIBRATION VERIFICATION CHECK (ROLL TEST) Station ToolFace Gravity Error Scale Factor Rate Error (deg) (Mg) Uncertainty (deg/min) 19420 269.79 -539.13 -0.00013478 -9.32 19419 269.79 -550.50 -0.00013762 -8.50 19418 224.86 -507.48 -0.00012687 -27.75 19417 224.86 -475.89 -0.00011898 -20.99 19416 45.80 -489.26 -0.00012232 -12.11 19415 45.80 -492.70 -0.00012318 -9.92 19414 1.08 -137.05 -0.00003422 -12.79 19413 1.08 -137.02 -0.00003421 -13.89 19412 329.75 -105.44 -0.00002632 -8.87 19411 329.75 -105.24 -0.00002627 -11.80 19410 300.03 -323.78 -0.00008086 -8.97 19409 300.03 -325.59 -0.00008131 -6.91 19408 270.68 -529.32 -0.00013233 -7.16 19407 270.68 -526.04 -0.00013151 -10.61 19406 238.38 -552.13 -0.00013807 -2.94 19405 238.38 -552.02 -0.00013804 -1.64 19404 210.33 -374.34 -0.00009355 -2.80 19403 210.34 -374.90 -0.00009369 -4.69 19402 180.89 -142.86 -0.00003567 -6.56 19401 180.89 -148.39 -0.00003705 -6.08 1 19400 149.08 -110.43 -0.00002756 -5.10 19399 149.08 -97.68 -0.00002438 -10.98 19398 118.80 -303.94 -0.00007592 -4.48 19397 118.80 -299.34 -0.00007477 -4.93 19396 90.37 -513.18 -0.00012830 -4.57 19395 90.37 -514.23 -0.00012856 -5.02 19394 60.51 -555.14 -0.00013883 -8.44 19393 60.51 -547.92 -0.00013703 -8.17 19392 30.68 -376.27 -0.00009403 -14.27 19391 30.68 -382.26 -0.00009553 -13.64 19390 358.50 -145.43 -0.00003631 -19.02 19389 358.50 -134.95 -0.00003369 -24.80 19388 270.63 -501.57 -0.00012540 -4.63 19387 270.63 -498.23 -0.00012456 -5.33 19386 223.68 -468.22 -0.00011706 -6.31 19385 223.68 -470.17 -0.00011755 -10.29 19384 44.75 -476.70 -0.00011918 -5.22 19383 44.75 -481.59 -0.00012040 -5.67 19382 0.21 -143.90 -0.00003593 -6.17 19381 0.21 -143.68 -0.00003587 -7.44 19380 329.22 -107.31 -0.00002678 -6.18 19379 329.21 -114.51 -0.00002858 -6.77 19378 300.12 -287.60 -0.00007183 -6.26 19377 300.12 -286.25 -0.00007150 -4.82 19376 269.18 -495.03 -0.00012377 -3.80 19375 269.18 -492.67 -0.00012318 -5.39 19374 239.78 -537.75 -0.00013448 0.55 19373 239.79 -532.88 -0.00013327 -2.34 19372 209.62 -353.31 -0.00008830 -1.13 19371 209.62 -357.24 -0.00008928 -0.42 19370 179.51 -151.91 -0.00003793 0.30 19369 179.51 -153.38 -0.00003829 0.43 19368 151.33 -103.70 -0.00002588 0.03 19367 151.33 -107.19 -0.00002675 2.31 19366 121.86 -261.89 -0.00006541 -0.88 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 2 of 12 AK1111GCM210 • Survey QC - RGS-C'Specification Sheet gyradata 19365 121.86 -263.76 -0.00006587 -0.92 19364 90.52 -466.49 -0.00011663 -3.28 19363 90.53 -459.94 -0.00011500 -3.98 19362 61.52 -516.07 -0.00012907 -2.04 19361 61.52 -524.16 -0.00013109 -2.55 19360 31.93 -425.07 -0.00010623 -4.94 19359 31.93 -425.92 -0.00010644 -3.81 19358 358.83 118.79 0.00002967 -2.37 19357 358.83 97.33 0.00002431 -3.20 MBO = -0.16 Gravity Error = -340.03 Scale Factor Uncertainty = -0.00008499 Rate Error= -6.72 INITIALISATION Gyro Compass Reading /Station Raw Inclination Raw Azimuth Abs (ERMeas-ERmeo) 93 10.05 112.45 0.0542 94 10.05 112.10 0.0360 95 10.05 112.13 0.0562 96 10.05 112.21 0.0756 97 10.05 112.52 0.1033 98 10.05 112.40 0.1045 Average 10.05 112.30 0.0716 Tolerance on Average* 0.0815 Standard Deviation 0.00 0.18 0.0280 Tolerance on St. Dev.** 0.1° 0.2° 0.0370 Advanced Initialisation Azimuth Advanced Initialisation Standard Deviation Tolerance =TBA * Tolerance on Average of earth horizontal rate difference is given by (1/Cosi)*J[(CosA*SinI*0.1)z+0.081 °/hr ** Tolerance on Standard Deviation of earth horizontal rate difference tolerance is given by (1/Cosi)*J[(CosA*SinI*0.1)2+(0.082/(n-1))] °/hr DRIFT TUNES Drift Tune Ending Ending Ending Ending Residual Gx Bias Residual Gy Bias Number Time Depth Inclination Azimuth Start End Start End 1 256.23 2545.28 18.19 119.22 -0.000 -0.002 0.000 0.003 2 1139.00 4997.71 46.39 126.76 -0.005 -0.001 0.000 0.003 3 1087.09 7497.55 53.96 128.52 -0.009 0.005 0.002 0.002 4 1164.30 10197.27 39.01 141.66 -0.011 0.004 0.005 -0.001 5 1189.75 11863.79 65.02 310.96 0.001 0.001 -0.007 0.014 6 552.55 11421.03 31.75 151.65 0.007 0.004 0.000 -0.006 7 1303.98 10297.07 38.16 145.20 0.003 -0.012 -0.002 -0.001 8 1267.22 9147.27 45.80 130.27 -0.002 -0.007 0.005 -0.007 9 1243.52 7992.57 52.84 128.42 -0.004 -0.003 0.004 -0.006 10 1204.42 6798.00 57.14 129.56 -0.000 -0.006 -0.001 -0.001 11 1172.50 5648.90 49.86 127.66 -0.001 -0.006 -0.001 -0.001 12 1132.94 4599.70 46.96 126.37 -0.004 -0.003 0.001 -0.003 13 1191.31 3450.72 40.11 123.43 -0.006 -0.002 0.001 -0.004 14 1044.34 2467.86 15.59 119.86 -0.005 -0.004 -0.003 0.002 15 324.78 2300.60 10.23 113.38 -0.000 -0.001 -0.001 0.001 SURV-Q167(OPS SUR-MA-003) 19Th Nov 03/Rev 15 Page 3 of 12 AK1111GCM210 • • Survey QC - RGS-•Specification Sheetgym/0 Average -0.002 -0.002 0.000 -0.000 Standard Deviation 0.005 0.005 0.003 0.005 Tolerance for both the Average and the Standard Deviation 0.033°/hr 0.033°/hr 0.033°/hr 0.033°/hr INCLINATION AND AZIMUTH INRUN AND OUTRUN COMPARISON Depth Corrected Inclination Corrected Azimuth Inrun * I Outrun * I Difference Inrun * I Outrun * I Difference 2200.00 8.04 8.27 -0.23 109.15 105.79 3.35 2300.00 10.09 10.27 -0.18 111.77 113.34 -1.56 2325.00 10.45 10.78 -0.33 111.79 113.40 -1.61 2350.00 11.22 11.52 -0.31 112.25 114.09 -1.83 2375.00 11.79 12.31 -0.52 112.89 115.25 -2.36 2400.00 12.68 13.12 -0.44 114.70 116.91 -2.21 2425.00 13.56 14.02 -0.46 116.28 118.34 -2.06 2450.00 14.39 15.08 -0.69 117.56 119.41 -1.85 2475.00 15.52 16.09 -0.57 118.69 119.98 -1.29 2500.00 16.57 17.05 -0.47 118.92 120.21 -1.29 2525.00 17.54 18.01 -0.47 119.18 120.24 -1.06 2550.00 18.42 18.87 -0.46 119.18 120.13 -0.95 2575.00 19.76 20.40 -0.64 118.82 119.52 -0.70 2600.00 20.95 21.62 -0.67 118.38 118.91 -0.53 2625.00 22.33 22.74 -0.42 117.75 118.42 -0.68 2650.00 23.01 23.18 -0.17 117.68 118.41 -0.73 2675.00 23.35 23.46 -0.11 117.69 118.41 -0.72 2700.00 23.58 23.77 -0.20 117.63 118.40 -0.77 2725.00 23.88 24.01 -0.13 117.73 118.32 -0.60 2750.00 24.21 24.42 -0.21 117.65 118.28 -0.64 2775.00 24.60 24.93 -0.33 117.50 118.24 -0.74 2800.00 25.33 25.60 -0.28 117.49 118.24 -0.75 2825.00 25.98 26.40 -0.43 117.49 118.20 -0.71 2850.00 26.66 26.97 -0.30 117.42 118.18 -0.76 2875.00 27.39 27.59 -0.20 117.57 118.30 -0.74 2900.00 27.75 27.95 -0.20 117.76 118.61 -0.85 2925.00 28.12 28.28 -0.16 118.15 118.96 -0.82 2950.00 28.30 28.40 -0.11 118.58 119.44 -0.87 2975.00 28.52 28.66 -0.13 118.97 119.88 -0.91 3000.00 28.82 29.04 -0.22 119.55 120.49 -0.93 3025.00 29.24 29.37 -0.13 120.12 121.10 -0.98 3050.00 29.58 29.82 -0.24 120.55 121.37 -0.82 3075.00 30.22 30.41 -0.20 121.00 121.87 -0.88 3100.00 30.52 30.62 -0.09 121.49 122.63 -1.15 3125.00 30.77 30.92 -0.15 122.42 123.25 -0.83 3150.00 31.21 31.45 -0.24 122.98 123.76 -0.78 3175.00 31.71 32.17 -0.46 123.14 123.87 -0.74 3200.00 32.84 33.12 -0.28 123.33 123.98 -0.65 3225.00 _ 33.75 34.42 -0.67 123.28 123.70 -0.42 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 4 of 12 AK1111GCM210 • gym/data Survey QC - RGS-C�Specification Sheet 3250.00 34.85 35.11 -0.26 123.14 123.67 -0.53 3275.00 35.58 35.83 -0.25 123.11 123.73 -0.63 3300.00 36.20 36.60 -0.40 123.15 123.67 -0.52 3325.00 36.92 37.11 -0.19 123.15 123.66 -0.51 3350.00 37.35 37.59 -0.24 123.16 123.80 -0.64 3375.00 38.08 38.35 -0.27 123.28 123.90 -0.63 3400.00 38.66 38.91 -0.25 123.29 123.79 -0.50 3425.00 39.39 39.60 -0.22 123.07 123.48 -0.41 3450.00 39.93 40.18 -0.24 122.96 123.45 -0.49 3475.00 40.46 40.65 -0.20 122.83 123.44 -0.61 3500.00 41.05 41.32 -0.27 122.91 123.51 -0.60 3525.00 41.72 42.08 -0.36 123.02 123.61 -0.59 3550.00 42.37 42.59 -0.21 123.22 123.82 -0.60 3575.00 42.77 42.94 -0.17 123.31 123.87 -0.56 3600.00 43.24 43.44 -0.20 123.63 124.44 -0.81 3625.00 43.56 43.73 -0.17 124.15 124.85 -0.70 3650.00 43.91 44.20 -0.29 124.41 125.11 -0.70 3675.00 44.41 44.56 -0.15 124.72 125.28 -0.56 3700.00 44.82 44.99 -0.17 124.86 125.39 -0.53 3725.00 45.22 45.46 -0.25 124.89 125.41 -0.52 3750.00 45.71 45.92 -0.21 124.93 125.43 -0.50 3775.00 46.29 46.64 -0.35 125.02 125.65 -0.63 3800.00 46.92 47.17 -0.25 125.16 125.63 -0.48 3825.00 47.43 47.66 -0.23 125.14 125.67 -0.53 3850.00 47.82 47.98 -0.16 125.17 125.69 -0.51 3875.00 47.97 48.03 -0.06 125.18 125.73 -0.55 3900.00 48.04 48.10 -0.06 125.27 125.71 -0.44 3925.00 48.13 48.13 -0.00 125.20 125.68 -0.48 3950.00 48.13 48.20 -0.07 125.20 125.72 -0.52 3975.00 48.25 48.27 -0.02 125.24 125.56 -0.33 4000.00 48.17 48.14 0.03 125.08 125.58 -0.50 4025.00 48.04 48.07 -0.03 125.14 125.66 -0.52 4050.00 47.97 47.99 -0.02 125.14 125.65 -0.51 4075.00 47.93 48.01 -0.08 125.13 125.66 -0.52 4100.00 48.01 48.00 0.02 125.11 125.61 -0.50 4125.00 48.05 48.03 0.02 125.20 125.72 -0.52 4150.00 47.90 47.98 -0.08 125.20 125.72 -0.51 4175.00 47.86 47.77 0.09 125.15 125.67 -0.52 4200.00 47.75 47.76 -0.01 125.27 125.75 -0.49 4225.00 47.65 47.67 -0.02 125.36 125.84 -0.48 4250.00 47.73 47.58 0.16 125.36 125.84 -0.48 4275.00 47.40 47.26 0.14 125.48 126.00 -0.52 4300.00 47.24 47.29 -0.05 125.52 125.98 -0.46 4325.00 47.51 47.69 -0.18 125.53 126.01 -0.48 4350.00 47.79 47.88 -0.09 125.54 126.06 -0.51 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 5 of 12 AK1111GCM210 • Survey QC - RGS-CrSpecification Sheet gyrodata 4375.00 47.70 47.70 0.00 125.56 126.13 -0.57 4400.00 47.77 47.86 -0.08 125.66 126.14 -0.48 4425.00 47.68 47.55 0.13 125.68 126.18 -0.50 4450.00 47.38 47.35 0.03 125.61 126.06 -0.46 4475.00 47.35 47.36 -0.01 125.53 126.12 -0.59 4500.00 47.14 47.16 -0.01 125.67 126.20 -0.52 4525.00 47.16 47.13 0.04 125.66 126.14 -0.48 4550.00 47.01 46.98 0.03 125.70 126.20 -0.49 4575.00 46.84 46.78 0.06 125.81 126.39 -0.57 4600.00 46.89 46.96 -0.07 125.82 126.37 -0.55 4625.00 47.05 47.08 -0.04 125.89 126.41 -0.52 4650.00 47.11 47.14 -0.03 125.92 126.48 -0.56 4675.00 47.20 47.27 -0.07 126.00 126.49 -0.49 4700.00 47.11 47.07 0.05 126.05 126.60 -0.56 4725.00 47.02 47.03 -0.01 126.12 126.70 -0.58 4750.00 46.98 47.02 -0.03 126.11 126.60 -0.49 4775.00 46.79 46.78 0.02 126.12 126.67 -0.55 4800.00 46.68 46.81 -0.13 126.20 126.76 -0.56 4825.00 46.82 46.82 -0.00 126.21 126.78 -0.58 4850.00 46.78 46.79 -0.00 126.35 126.88 -0.53 4875.00 46.84 46.88 -0.04 126.37 126.90 -0.52 4900.00 46.66 46.69 -0.03 126.43 127.05 -0.62 4925.00 46.75 46.77 -0.02 126.58 127.11 -0.53 4950.00 46.81 46.87 -0.06 126.59 127.14 -0.55 4975.00 46.75 46.70 0.04 126.70 127.23 -0.53 5000.00 46.65 46.63 0.02 126.80 127.31 -0.51 5025.00 46.43 46.42 0.01 126.88 127.41 -0.53 5050.00 46.54 46.47 0.07 126.83 127.38 -0.55 5075.00 46.30 46.31 -0.02 126.97 127.41 -0.43 5100.00 46.29 46.37 -0.08 127.09 127.57 -0.48 5125.00 46.49 46.56 -0.07 127.04 127.55 -0.51 5150.00 46.62 46.63 -0.01 127.03 127.45 -0.42 5175.00 46.45 46.43 0.02 126.97 127.47 -0.50 5200.00 46.42 46.40 0.01 126.99 127.49 -0.50 5225.00 46.10 46.14 -0.04 127.05 127.55 -0.50 5250.00 46.17 46.22 -0.05 127.09 127.49 -0.40 5275.00 46.31 46.41 -0.10 127.02 127.47 -0.45 5300.00 46.53 46.66 -0.13 126.93 127.37 -0.44 5325.00 46.84 46.96 -0.12 126.97 127.35 -0.39 5350.00 47.17 47.26 -0.09 126.77 127.29 -0.52 5375.00 47.53 47.64 -0.11 126.83 127.33 -0.50 5400.00 47.77 47.83 -0.06 126.79 127.27 -0.48 5425.00 47.95 48.06 -0.11 126.80 127.27 -0.47 5450.00 48.12 48.13 -0.00 126.79 127.27 -0.48 5475.00 48.11 48.19 -0.08 126.87 127.36 -0.48 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 6 of 12 AK1111GCM210 Survey QC - RGS-Cpecification Sheet • gyroidata 5500.00 48.44 48.55 -0.12 126.92 127.37 -0.45 5525.00 48.74 48.78 -0.04 126.92 127.42 -0.50 5550.00 49.08 49.19 -0.11 127.02 127.47 -0.44 5575.00 49.36 49.49 -0.12 126.99 127.51 -0.52 5600.00 49.60 49.57 0.03 127.16 127.60 -0.45 5625.00 49.57 49.67 -0.09 127.07 127.59 -0.52 5650.00 49.86 49.93 -0.07 127.13 127.63 -0.50 5675.00 50.30 50.42 -0.12 127.14 127.63 -0.49 5700.00 50.71 50.82 -0.12 127.30 127.80 -0.50 5725.00 51.10 51.21 -0.11 127.35 127.86 -0.50 5750.00 51.54 51.68 -0.14 127.45 127.93 -0.49 5775.00 51.87 51.96 -0.08 127.48 127.97 -0.49 5800.00 52.26 52.38 -0.11 127.54 127.98 -0.44 5825.00 52.56 52.69 -0.13 127.48 127.97 -0.49 5850.00 52.83 52.85 -0.02 127.54 128.01 -0.47 5875.00 52.97 53.03 -0.05 127.45 127.97 -0.51 5900.00 53.19 53.28 -0.09 127.56 128.03 -0.47 5925.00 53.50 53.62 -0.11 127.55 127.96 -0.41 5950.00 53.69 53.66 0.02 127.43 127.95 -0.52 5975.00 53.73 53.76 -0.03 127.56 128.03 -0.47 6000.00 53.47 53.50 -0.02 127.60 128.12 -0.52 6025.00 53.69 53.74 -0.05 127.61 128.08 -0.47 6050.00 53.71 53.74 -0.02 127.67 128.16 -0.49 6075.00 53.69 53.82 -0.13 127.62 128.14 -0.52 6100.00 53.93 54.00 -0.07 127.76 128.23 -0.46 6125.00 54.11 54.09 0.01 127.76 128.26 -0.50 6150.00 54.11 54.11 -0.01 127.89 128.37 -0.48 6175.00 54.28 54.32 -0.04 127.97 128.38 -0.41 6200.00 54.31 54.32 -0.01 128.00 128.44 -0.44 6225.00 54.24 54.31 -0.07 128.14 128.60 -0.46 6250.00 54.41 54.43 -0.02 128.15 128.69 -0.54 6275.00 54.53 54.61 -0.08 128.28 128.75 -0.47 6300.00 54.65 54.68 -0.02 128.45 128.90 -0.45 6325.00 54.79 54.87 -0.07 128.40 128.95 -0.55 6350.00 55.11 55.20 -0.09 128.61 129.07 -0.46 6375.00 55.47 55.53 -0.06 128.58 129.01 -0.43 6400.00 55.56 55.63 -0.07 128.59 129.08 -0.49 6425.00 55.72 55.82 -0.09 128.68 129.13 -0.45 6450.00 55.88 55.85 0.03 128.66 129.09 -0.43 6475.00 55.51 55.56 -0.05 128.65 129.11 -0.47 6500.00 55.64 55.71 -0.07 128.67 129.10 -0.43 6525.00 55.96 55.99 -0.03 128.60 129.11 -0.51 6550.00 56.12 56.21 -0.09 128.68 129.05 -0.37 6575.00 56.39 56.43 -0.04 128.58 129.07 -0.49 • 6600.00 56.61 56.68 -0.06 128.68 129.13 -0.45 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 7 of 12 AK1111GCM210 • Survey QC - RGS-C•pecification Sheet • gYrOdata 6625.00 56.85 56.93 -0.08 128.77 129.23 -0.46 6650.00 57.09 57.11 -0.02 128.79 129.26 -0.47 6675.00 57.09 57.14 -0.05 128.90 129.35 -0.45 6700.00 57.01 57.04 -0.04 128.91 129.40 -0.49 6725.00 57.14 57.20 -0.06 129.07 129.50 -0.43 6750.00 57.28 57.36 -0.08 129.01 129.47 -0.46 6775.00 57.22 57.20 0.02 129.12 129.54 -0.41 6800.00 57.09 57.12 -0.03 129.12 129.50 -0.38 6825.00 56.99 57.05 -0.05 129.06 129.46 -0.41 6850.00 57.05 57.06 -0.01 129.01 129.41 -0.39 6875.00 56.82 56.85 -0.03 128.90 129.28 -0.38 6900.00 56.71 56.73 -0.02 128.86 129.33 -0.46 6925.00 56.74 56.76 -0.02 128.89 129.35 -0.47 6950.00 56.68 56.72 -0.05 128.84 129.29 -0.45 6975.00 56.76 56.74 0.02 128.84 129.25 -0.41 7000.00 56.56 56.60 -0.03 128.81 129.25 -0.43 7025.00 56.54 56.52 0.02 128.74 129.15 -0.42 7050.00 56.51 56.52 -0.01 128.73 129.14 -0.41 7075.00 56.16 56.19 -0.03 128.68 129.17 -0.49 7100.00 56.20 56.20 -0.01 128.64 129.08 -0.44 7125.00 56.17 56.21 -0.03 128.62 129.04 -0.42 7150.00 56.00 55.98 0.03 128.53 129.00 -0.48 7175.00 55.82 55.86 -0.03 128.59 129.06 -0.46 7200.00 55.77 55.81 -0.05 128.58 129.06 -0.48 7225.00 55.70 55.67 0.03 128.66 129.15 -0.48 7250.00 55.31 55.35 -0.04 128.68 129.15 -0.48 7275.00 55.40 55.43 -0.03 128.61 129.07 -0.45 7300.00 55.43 55.40 0.03 128.49 129.00 -0.50 7325.00 55.12 55.15 -0.03 128.64 129.10 -0.46 7350.00 54.79 54.76 0.04 128.66 129.14 -0.48 7375.00 54.63 54.67 -0.04 128.64 129.09 -0.45 7400.00 54.69 54.73 -0.03 128.64 129.13 -0.49 7425.00 54.56 54.53 0.03 128.68 129.19 -0.51 7450.00 54.35 54.38 -0.03 128.68 129.12 -0.44 7475.00 54.26 54.23 0.03 128.59 129.07 -0.48 7500.00 54.11 54.14 -0.03 128.55 129.01 -0.45 7525.00 54.21 54.23 -0.01 128.52 128.92 -0.40 7550.00 54.20 54.21 -0.00 128.44 128.96 -0.51 7575.00 54.19 54.24 -0.05 128.52 128.97 -0.45 7600.00 54.29 54.32 -0.02 128.45 128.87 -0.42 7625.00 54.08 54.06 0.01 128.43 128.82 -0.39 7650.00 53.96 53.96 -0.01 128.37 128.76 -0.39 7675.00 53.71 53.72 -0.01 128.32 128.79 -0.47 7700.00 53.70 53.72 -0.01 128.38 128.82 -0.44 ' 7725.00 53.66 53.69 -0.03 128.35 128.82 -0.47 SURV-Q167(OPS SUR-MA-003) 19`"Nov 03/Rev 15 Page 8 of 12 AK1111GCM210 • Survey QC - RGS-CCSpecification Sheetgym/data 7750.00 53.71 53.74 -0.03 128.33 128.75 -0.42 7775.00 53.76 53.76 0.00 128.31 128.74 -0.43 7800.00 53.45 53.46 -0.01 128.24 128.65 -0.40 7825.00 53.40 53.37 0.02 128.17 128.58 -0.40 7850.00 53.24 53.25 -0.01 128.08 128.48 -0.40 7875.00 53.06 53.07 -0.00 128.03 128.48 -0.44 7900.00 53.10 53.11 -0.01 128.02 128.45 -0.42 7925.00 52.89 52.92 -0.03 128.01 128.43 -0.42 7950.00 52.99 52.97 0.01 127.99 128.41 -0.42 7975.00 52.92 52.92 0.00 127.95 128.36 -0.41 8000.00 52.75 52.76 -0.01 127.97 128.42 -0.45 8025.00 52.70 52.73 -0.02 127.88 128.32 -0.44 8050.00 52.59 52.60 -0.01 127.96 128.39 -0.43 8075.00 52.22 52.23 -0.00 127.94 128.38 -0.44 8100.00 52.16 52.16 -0.00 128.02 128.44 -0.43 8125.00 51.93 51.92 0.00 127.86 128.29 -0.43 8150.00 51.74 51.74 -0.00 128.00 128.46 -0.46 8175.00 51.51 51.52 -0.01 127.91 128.32 -0.41 8200.00 51.32 51.33 -0.01 127.90 128.39 -0.49 8225.00 51.31 51.30 0.01 127.94 128.38 -0.44 8250.00 51.03 51.05 -0.02 127.99 128.45 -0.47 8275.00 50.82 50.81 0.01 127.99 128.47 -0.48 8300.00 50.72 50.73 -0.01 127.99 128.46 -0.46 8325.00 50.33 50.34 -0.01 127.99 128.43 -0.44 8350.00 50.23 50.23 -0.01 128.00 128.45 -0.45 8375.00 50.02 50.04 -0.01 128.06 128.51 -0.45 8400.00 49.80 49.81 -0.02 128.10 128.55 -0.45 8425.00 49.64 49.64 -0.00 128.15 128.63 -0.48 8450.00 49.39 49.41 -0.01 128.10 128.54 -0.43 8475.00 49.12 49.13 -0.01 128.09 128.56 -0.47 8500.00 49.04 49.05 -0.01 128.16 128.62 -0.46 8525.00 48.72 48.73 -0.01 128.16 128.62 -0.46 8550.00 48.39 48.39 -0.01 128.24 128.71 -0.47 8575.00 48.15 48.16 -0.01 128.26 128.75 -0.50 8600.00 47.84 47.85 -0.01 128.28 128.75 -0.47 8625.00 47.67 47.66 0.01 128.37 128.86 -0.49 8650.00 47.22 47.22 -0.00 128.37 128.83 -0.46 8675.00 46.92 46.91 0.01 128.26 128.74 -0.48 8700.00 46.80 46.79 0.01 128.20 128.63 -0.43 8725.00 46.43 46.43 -0.00 128.19 128.64 -0.45 8750.00 46.25 46.25 0.00 128.15 128.63 -0.47 8775.00 46.35 46.34 0.01 128.12 128.60 -0.48 8800.00 46.27 46.26 0.01 128.27 128.73 -0.45 8825.00 46.24 46.23 0.01 128.34 128.83 -0.49 ' 8850.00 46.34 46.34 0.00 128.43 128.91 -0.48 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 9 of 12 AK1111GCM210 1 • Survey QC - RGS-Apecification Sheet ,•; a I l 8875.00 46.18 46.17 0.01 128.62 129.10 -0.48 8900.00 46.23 46.23 -0.00 128.68 129.17 -0.49 8925.00 46.35 46.35 -0.00 128.68 129.19 -0.50 8950.00 46.43 46.41 0.01 128.88 129.37 -0.49 8975.00 46.34 46.35 -0.00 128.91 129.40 -0.49 9000.00 46.22 46.22 0.00 129.13 129.64 -0.51 9025.00 46.19 46.19 -0.00 129.17 129.64 -0.47 9050.00 46.18 46.18 -0.01 129.28 129.78 -0.50 9075.00 45.96 45.95 0.01 129.50 129.97 -0.47 9100.00 45.88 45.88 -0.00 129.60 130.08 -0.48 9125.00 45.70 45.70 0.00 129.78 130.26 -0.48 9150.00 45.66 45.66 -0.00 129.86 130.38 -0.52 9175.00 45.61 45.62 -0.01 130.03 130.54 -0.51 9200.00 45.41 45.41 0.00 130.25 130.76 -0.50 9225.00 45.25 45.25 -0.00 130.43 130.97 -0.54 9250.00 45.15 45.17 -0.03 130.59 131.13 -0.54 9275.00 45.02 45.02 -0.01 130.56 131.08 -0.52 9300.00 45.03 45.04 -0.02 130.67 131.19 -0.51 9325.00 44.90 44.92 -0.03 130.82 131.36 -0.54 9350.00 44.84 44.86 -0.02 130.99 131.55 -0.56 9375.00 44.54 44.57 -0.03 131.21 131.79 -0.58 9400.00 44.45 44.48 -0.03 131.07 131.63 -0.56 9425.00 44.58 44.60 -0.03 131.35 131.85 -0.50 9450.00 44.40 44.44 -0.04 131.45 131.99 -0.54 9475.00 44.29 44.32 -0.03 131.64 132.20 -0.56 9500.00 44.06 44.10 -0.04 131.89 132.44 -0.55 9525.00 43.91 43.95 -0.03 132.29 132.85 -0.56 9550.00 43.86 43.90 -0.04 132.78 133.31 -0.54 9575.00 43.45 43.50 -0.04 133.17 133.77 -0.60 9600.00 43.30 43.33 -0.03 133.61 134.22 -0.61 9625.00 43.18 43.21 -0.04 134.13 134.71 -0.58 9650.00 42.88 42.90 -0.02 134.39 134.98 -0.59 9675.00 42.71 42.73 -0.02 134.79 135.35 -0.56 9700.00 42.48 42.51 -0.03 135.21 135.82 -0.62 9725.00 42.19 42.21 -0.03 135.59 136.17 -0.58 9750.00 41.93 41.95 -0.02 136.06 136.63 -0.57 9775.00 41.74 41.77 -0.03 136.48 137.08 -0.60 9800.00 41.65 41.67 -0.03 136.88 137.49 -0.61 9825.00 41.75 41.77 -0.02 137.10 137.68 -0.58 9850.00 41.66 41.68 -0.02 137.28 137.87 -0.59 9875.00 41.39 41.41 -0.02 137.46 138.03 -0.56 9900.00 41.22 41.24 -0.02 137.78 138.36 -0.58 9925.00 40.99 41.02 -0.02 138.01 138.58 -0.57 9950.00 40.68 40.70 -0.02 138.55 139.14 -0.59 ' 9975.00 40.58 40.60 -0.02 138.79 139.37 -0.58 SURV-Q167(OPS SUR-MA-003) 19Th Nov 03/Rev 15 Page 10 of 12 AK1111GCM210 • Survey QC - RGS-C!Specification Sheet gyrodata 10000.00 40.49 40.50 -0.02 138.96 139.56 -0.60 4 10025.00 40.33 40.35 -0.02 139.06 139.69 -0.62 10050.00 40.19 40.21 -0.02 139.47 140.07 -0.61 10075.00 40.14 40.16 -0.02 139.83 140.43 -0.59 10100.00 40.06 40.08 -0.02 140.23 140.86 -0.63 10125.00 39.93 39.94 -0.01 140.52 141.12 -0.60 10150.00 39.57 39.61 -0.04 141.08 141.68 -0.60 10175.00 39.25 39.28 -0.02 141.53 142.15 -0.62 10200.00 38.80 38.82 -0.02 141.95 142.50 -0.56 10225.00 38.42 38.46 -0.04 142.72 143.29 -0.57 10250.00 38.38 38.35 0.03 143.30 143.95 -0.64 10275.00 38.07 38.11 -0.04 144.45 144.68 -0.23 10300.00 37.79 37.81 -0.02 144.80 145.25 -0.45 10325.00 37.83 37.78 0.05 145.54 146.12 -0.57 10350.00 37.94 37.93 0.01 146.23 146.64 -0.41 10375.00 37.79 37.84 -0.05 147.01 147.38 -0.37 10400.00 38.39 38.20 0.18 147.66 147.86 -0.20 10425.00 37.87 37.90 -0.03 147.81 148.33 -0.52 10450.00 38.10 37.94 0.16 147.38 147.54 -0.16 10475.00 37.42 37.46 -0.04 144.96 145.45 -0.49 10500.00 37.42 37.28 0.14 144.15 144.35 -0.20 10525.00 37.52 37.52 0.00 143.46 143.97 -0.51 10550.00 38.05 37.93 0.12 143.90 144.09 -0.19 10575.00 38.62 38.62 -0.00 144.02 144.52 -0.50 10600.00 39.16 39.05 0.12 144.60 144.78 -0.17 10625.00 39.85 39.80 0.06 144.71 145.23 -0.52 10650.00 40.43 40.42 0.00 145.91 146.12 -0.21 10675.00 40.76 40.61 0.15 146.27 146.69 -0.42 10700.00 41.70 41.74 -0.04 146.55 147.00 -0.45 10725.00 42.21 42.04 0.17 147.53 147.75 -0.22 10750.00 42.84 42.77 0.07 147.78 148.27 -0.50 10775.00 43.62 43.68 -0.06 148.92 149.23 -0.31 10800.00 44.29 44.12 0.17 149.17 149.59 -0.42 10825.00 44.69 44.74 -0.05 149.95 150.41 -0.45 10850.00 45.52 45.34 0.18 150.78 151.02 -0.24 10875.00 45.87 45.81 0.06 151.27 151.74 -0.48 10900.00 46.44 46.51 -0.07 151.88 152.29 -0.41 10925.00 47.01 46.83 0.18 152.43 152.70 -0.27 10950.00 46.25 46.22 0.03 152.16 152.68 -0.52 10975.00 47.56 47.44 0.12 153.47 153.70 -0.22 11000.00 47.57 47.42 0.15 154.51 154.97 -0.46 11025.00 46.88 46.95 -0.07 155.27 155.59 -0.32 11050.00 46.45 46.26 0.19 156.21 156.59 -0.38 11075.00 45.16 45.09 0.07 157.04 157.61 -0.57 11100.00 43.95 43.81 0.14 157.76 158.03 -0.27 SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 11 of 12 AK1111GCM210 Survey QC - RGS-C!pecification Sheetf1 ,' a� � 11125.00 42.67 42.54 0.14 158.60 159.13 -0.53 11150.00 42.55 42.50 0.05 159.96 160.24 -0.27 11175.00 42.14 42.06 0.08 158.29 158.89 -0.60 11200.00 40.98 40.84 0.14 159.41 159.69 -0.28 11225.00 41.56 41.49 0.06 159.39 159.99 -0.61 11250.00 40.64 40.53 0.11 158.27 158.57 -0.30 11275.00 39.86 39.68 0.17 159.12 159.63 -0.51 11300.00 39.41 39.44 -0.03 158.55 159.11 -0.56 11325.00 39.59 39.37 0.22 158.20 158.60 -0.40 11350.00 39.08 38.97 0.11 159.28 159.88 -0.60 11375.00 37.28 37.05 0.23 157.26 157.57 -0.31 11400.00 33.77 33.50 0.28 158.67 158.99 -0.32 11425.00 29.92 29.40 0.52 150.92 151.35 -0.43 11450.00 23.51 23.11 0.40 156.68 156.91 -0.23 11475.00 17.05 16.69 0.36 162.77 162.91 -0.15 11500.00 13.61 13.34 0.27 183.42 183.18 0.24 11525.00 12.82 12.56 0.26 210.29 209.81 0.48 11550.00 14.30 14.06 0.24 234.62 233.92 0.70 11575.00 17.41 17.27 0.14 255.88 254.70 1.17 11600.00 22.37 22.22 0.15 266.54 265.57 0.96 11625.00 23.66 23.57 0.09 281.11 280.20 0.91 11650.00 29.16 29.32 -0.15 284.50 283.14 1.36 11675.00 35.66 35.75 -0.10 283.70 282.48 1.23 11700.00 42.36 42.50 -0.14 284.03 282.91 1.12 11725.00 49.14 49.28 -0.14 284.62 283.83 0.79 11750.00 55.82 55.89 -0.07 287.21 286.57 0.64 1 11775.00 60.37 60.27 0.10 292.63 292.26 0.37 11800.00 62.01 61.89 0.13 300.87 300.45 0.42 11825.00 64.17 64.19 -0.02 308.41 308.64 -0.22 Average -0.0502 -0.4709 Standard Deviation 0.1446 0.2711 Tolerance for both the Average and the Standard Casing 0.3° Casing 0.5° Deviation Drillpipe 0.3° Drillpipe 0.75° * Inclination and Azimuth interpolated to same depths as shown. I SURV-Q167(OPS SUR-MA-003) 19th Nov 03/Rev 15 Page 12 of 12 AK1111GCM210 Survey QC - RGS-CT Analysis Sheet gymd alaltlialeaMiamengs=1 SURVEY QUALITY CONTROL - DATA ANALYSIS REFERENCE SYSTEMS Grid System I Grid Correction 0.00 Azimuth reference: Grid/True North TRUE NORTH Vertical reference: RKB/MSL/Other RKB I If other give details f TIE ON DATA Depth 0.00 Inclination 0.00 Azimuth 0.00 TVD 10.00 Northings 0.00 Eastings 0.00 Latitude 70.2988 Az. Ref: Grid/True True Grid Corrected Y/N? N Description CALIBRATION Tool Number 1519 I Calibration Date 20 Jun 2011 OPERATING TEMPERATURE Calibration range From 50.04 To 120.11 Gyro operating range From 54.84 To 120.50 I Spec'- Within calibration range FIELD ROLL TEST (Only valid on fixed structures. When not possible input roll test data performed after return to base) Cal value Pre job offset Post job offset Abs dif.cal.post Abs dif.pre.post Spec' Accel Scale 0.000061 -0.000084 -0.000085 0.000085 0.000001 Cal/Post-0.00015 Mass Unbalance 1.40 -0.18 -0.16 0.16 0.02 Pre/Post- 0.4°/hr INITIALISATION Depth (Approx) 2299.53 No of stns 6 Spec' - Min No. - 6 Azimuth Mean 112.30 Std deviation 0.18 Spec'- Azi SD 0.2° Inclination Mean 10.05 Std deviation 0.00 Spec'- Inc SD 0.1° Earth Horizontal Rate Mean (Abs(meas-theor)) 10.07 Std deviation 0.03 Spec'-See Q167 DRIFT TUNE Residual x gyro bias Mean -0.002 Std dev' 0.005 Spec's- Mean and SD - 0.333°/hr Residual y gyro bias Mean -0.000 Std dev' 0.005 Spec's- Mean and SD- 0.333°/hr TOOLFACE RATE Maximum toolface rate 10.26 I Spec'-400°/sec IN/OUT COMPARISON (AZI' N/A IF INC' <15° Inclination Difference Mean -0.05 I Std dev' 0.14 Spec's- Casing 0.3°/Drill pipe 0.3° Azimuth Difference Mean -0.47 I Std dev' 0.27 Spec's- Casing 0.5°/Drill pipe 0.75° Lateral Divergence/1000 4.57 Spec- 5.0/1000 Vertical Divergence/1000 0.41 Spec'- 2.0/1000 DEPTH CONTROL Wireline Company Schlumberger I Line type 15/32 Encoder SF I Schlumberger Max Depth (TD) 11841 CCL Corrected No Zero Depth (Rig up) RKB@ 62.94' Rezero Depth -7 Given pup joint depth NA Measured P3 NA Strech cor. At TD divided by TD/1000 1.27 Spec'- 1.5/1000 Dif. Between rigup and rezero depths divided by TD/1000 .59 Spec'-2.0/1000 Dif. Between given and meas depth divided by meas/1000 1.28 Spec' -2.0/1000 t SURV-Q165(OPS SUR-MA-010)22nd Jan 2004/Revision 20 Page 1 of 1 AK1111GCM210 gym/data Survey QC - RGS-CT Acceptance Sheet VISMIAVISAMIMPARMSEMOI 40104414M1 FIELD AND SURVEY INFORMATION Operator BP Production Field/ Platform Wellhead Well Number C- 12B Survey section From 0.00 ft. to 11841.0 ft. Date 04 Nov 2011 Gyrodata Job No AK1111GCM210 Gyrodata Surveyors Tobias Phillips Job Objective High Accuracy Gyro Survey SURVEY PERFORMANCE In Spec' QC Parameter Yes/No/NA Possible Actions Contact Duty Engineer to discuss options: Operational temperature within Yes 1. Recalibrate tool to higher temperature specification 2. Resurvey with backup tool 3. Resurvey'Hot'section at higher speed Roll test data within specification Contact Duty Engineer to discuss options: Only valid on land/fixed installations Yes 1. Recalibrate tool and reprocess survey 2. Resurvey with backup tool Continuous initialisation within Take new initialisation, after three failures: specification Yes 1. Contact Duty Engineer or, 2. Resurvey with back up tool. Contact Duty Engineer to discuss options: Toolface rate within specification Yes Resurvey section from previous bias check Investigate and comment if effects are negligible Contact Duty Engineer to discuss options: Drift tunes within specification Yes 1. Reprocess with different software settings 2. Resurvey with backup tool Inrun/Outrun comparison within Contact Duty Engineer to discuss options. specification Yes Resurvey is usually not required if either inrun or outrun meet all other QC parameters Depth control within specification Yes Contact Duty Engineer to discuss options. Action taken: Note: Provided satisfactory action has been taken, parameters out with specification will not necessarily fail a survey. SURVEY ACCEPTED Gyrodata Representative Client's Representative • SURV-Q166(OPS SUR-MA-003)13th Nov 03/Revision 12 Page 1 of 1 AK1111GCM210 20 9- - 65 13-JUL -2011 2l'l3S Schho Merger No. 5764 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 W -223 BCRJ -00086 ISOLATION SCANNER 18- May -11 1 1 W -221 BJGT -00040 USIT 16-Jun-11 1 1 C -11A BLPO -00111 PPROF W GHOST 14-Jun-11 1 1 H -19B BLPO -00109 MEMORY PPROF W GHOST 12-Jun-11 1 1 V -227 BCRJ -00090 SCMT 19-Jun-11 1 1 X -22A AWJI -00143 USIT 18-Jun-11 1 1 MPI -09 BCRC-00067 MEMORY LEAK DETECTION LOG 18-Jun-11 1 1 • 14 -36 BCRJ -00091 IPROF 21 -Jun -11 1 1 J -27A BAUJ -00090 PPROF W GHOST 20-Jun-11 1 1 D -06A BL65 -00041 PPROF W DEFT GHOST 24-Jun-11 1 1 16-05A BSM4 -00008 LEAK DETECTION LOG 27-Jun-11 1 1 Z -27 BSM4 -00009 GAS LIFT SURVEY 2-Jul-11 1 1 09 -22 BJGT -00048 (PROF 4-Jul-11 1 1 W -08A BBSK -00076 SCMT 25-Jun-11 1 1 Y -04 AWJI -00147 PPROF W DEFT GHOST 22-Jun-11 1 1 R -28 BJGT -00047 SBHPS 3- Jul -11 1 1 U -118 BG4H -00058 PPROF 16- Jun -11 1 1 Z -31 BCRJ -00093 SCMT 10-Jul-11 1 1 F-48 BG4H-00062 PPROF W DEFT GHOST 9-Jul-11 1 1 06 -11 BSM4 -00012 PPROF W DEFT GHOST 4-Jul-11 1 1 C -32C BLPO -00117 PPROF W GHOST 5-Jul-11 1 1 01-31 BP5G -00001 RST EDIT 17- Mar -11 1 1 N -17 BJOH-00007 PDC -GR EDIT 9- Feb -11 1 C -12B BAUJ -00064 MCNL EDIT 9- Mar -11 1 1 C -22A BL65 -00022 MCNL EDIT 7- Mar -11 1 1 14 -33A BL65 -00023 MCNL EDIT 6- Apr -11 1 1 S -129 10AKA0109 OH PDC -GR EDIT 7- Nov -10 1 1 S- 129PB1 10AKA0109 OH PDC-GR EDIT 7- Nov -10 1 1 S- 129PB2 10AKA0109 OH PDC-GR EDIT 7- Nov -10 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 18 -NOV -2011 209-.0% S hUI I ' 2■ az..1 5828 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 C -12B BINC -00079 SCMT 3- Nov -11 1 1 P1 -20 BJGT -00071 PPROF W/ DEFT & GHOST 21- Oct -11 1 1 12 -06A BX69 -00007 PRIMARY DEPTH CONTROL LOG 31- Oct -11 1 1 U -03 AWJI -00172 (PROF 4- Nov -11 1 1 06 -19A BCRC -00146 CEMENT BOND LOG 7- Nov -11 1 1 III MPS -28 BJGT -00077 LEAK DETECTION LOG _ 24- Oct -11 1 1 01 -16 BCRC -00144 LEAK DETECTION LOG 5- Nov -11 1 1 18 -15B BINC -00071 PRIMARY DEPTH CONTROL LOG 17- Oct -11 1 1 14 -27 AWJI -00174 PRIMARY DEPTH CONTROL LOG 7- Nov -11 1 1 C -12B BINC -00079 PRIMARY DEPTH CONTROL LOG 3- Nov -11 1 1 Z-67 BCRJ -00098 USIT 19-Jul-11 1 1 Z-30A BJGT -00055 SBHPS 28-Jul-11 _ 1 1 18 -03B BINC -00043 TEMPERATURE & PRESS SURVEY 26-Jun-11 1 1 13 -26 BBRJ -00018 PRIMARY DEPTH CONTROL LOG 28- Oct -11 1 1 Z -113 BG4H -00090 ISOLATION SCANNER 12- Sep -11 1 1 J -16A BYS4 -00004 PRIMARY DEPTH CONTROL LOG 13- Nov -11 1 1 14 -28A BD88 -00176 MEMORY CEMENT BOND LOG 22- Oct -11 1 1 P2 -10 AV1P -00105 REVISION PPROF W/ DEFT & GHOST 10- Sep -11 1 1 0 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 18 -NOV -2011 2IO( 6 Sckluderger 5828 2 O. o O5 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 C -12B BINC -00079 SCMT 3- Nov -11 1 1 P1 -20 BJGT -00071 PPROF W/ DEFT & GHOST _ 21- Oct -11 1 1 12 -06A BX69 -00007 PRIMARY DEPTH CONTROL LOG 31- Oct -11 1 1 U -03 AWJI -00172 IPROF _ 4- Nov -11 1 1 06 -19A BCRC -00146 CEMENT BOND LOG 7- Nov -11 1 1 • MPS -28 BJGT -00077 LEAK DETECTION LOG 24- Oct -11 1 1 01 -16 BCRC -00144 LEAK DETECTION LOG 5- Nov -11 1 1 18 -15B BINC -00071 PRIMARY DEPTH CONTROL LOG 17- Oct -11 1 1 14 -27 AWJI -00174 PRIMARY DEPTH CONTROL LOG 7- Nov -11 _ 1 1 C -12B BINC -00079 PRIMARY DEPTH CONTROL LOG 3- Nov -11 1 1 Z-67 BCRJ -00098 USIT 19-Jul-11 1 1 Z-30A BJGT -00055 SBHPS 28-Jul-11 1 1 • 18 -03B BINC -00043 TEMPERATURE & PRESS SURVEY 26-Jun-11 1 1 13 -26 BBRJ -00018 PRIMARY DEPTH CONTROL LOG 28- Oct -11 1 1 Z -113 BG4H -00090 ISOLATION SCANNER 12- Sep -11 1 1 J -16A BYS4 -00004 PRIMARY DEPTH CONTROL LOG 13- Nov -11 1 1 14 -28A BD88 -00176 MEMORY CEMENT BOND LOG 22- Oct -11 1 1 P2 -10 AV1P -00105 REVISION PPROF W/ DEFT & GHOST 10- Sep -11 1 _ 1 • l e 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 o bp BP Exploration (Alaska) Inc. 0 Attn: Well Integrity Coordinator, PRB -20 Post Office Box 196612 Anchorage, Alaska 99519 -6612 August 22, 2011 RECEIVED Mr. Tom Maunder AUG 31 ?J111 Alaska Oil and Gas Conservation Commission 333 West 7 Avenue alb.({ & Gas Com CottstrissiOft Anchorage, Alaska 99501 Ancharbgs Subject: Corrosion Inhibitor Treatments of GPB C -Pad ao _ °s Dear Mr. Maunder, i-- C Enclosed please find multiple copies of a spreadsheet with a list of wells from GPB C- Pad that were treated with corrosion inhibitor in the surface casing by conductor annulus. The corrosion inhibitor is engineered to prevent water from entering the annular space and causing external corrosion that could result in a surface casing leak to atmosphere. The attached spreadsheet represents the well name, API and PTD numbers, top of cement depth prior to filling and volumes of corrosion inhibitor used in each conductor. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of form 10 -404, Report of Sundry Operations. If you require any additional information, please contact me or my alternate, Gerald Murphy, at 659 -5102. Sincerely, Torin Roschinger BPXA, Well Integrity Coordinator I • • q BP Exploration (Alaska) Inc. Surface Casing by Conductor Annulus Cement, Corrosion inhibitor, Sealant Top -off Report of Sundry Operations (10 -404) C -Pad 7/19/11 Corrosion Vol. of cement Final top of Cement top off Corrosion inhibitor/ Well Name PTD # API # Initial top of cement pumped cement date inhibitor sealant date ft bbls ft na gal C -01A 2030100 500292012101 0.3 NA 0.3 NA 3.40 11/16/2010 C -02 1730040 500292012300 0.3 NA 0.3 NA 3.40 11/16/2010 C -03B 2051580 500292012402 0.3 NA 0.3 NA 3.40 11/16/2010 C -04B 2060570 500292012502 1.25 NA 1.25 NA 23.80 10/26/2010 C -05A 2010020 500292012601 0.8 NA 0.8 NA 3.40 11/23/2010 C -06B 2061040 500292012702 1 NA 1 NA 5.10 11/22/2010 C -07A 2000520 500292012801 0.3 NA 0.3 NA 1.70 11/22/2010 C -086 2050110 500292012902 1 NA 1 NA 5.10 11/20/2010 C -09A 2020940 500292036601 0.1 NA 0.1 NA 0.85 11/23/2010 C -10A 2051370 500292037101 0.1 NA 0.1 NA 3.40 11/12/2010 C -11A 2030480 500292038201 0.1 NA 0.1 NA 1.70 11/13/2010 C -12B 2090850 500292038702 2 NA 2 NA 10.20 11/11/2010 C -13A 1971430 500292040401 10.7 NA 10.7 NA 74.80 11/25/2010 C -15A 2090520 500292042701 10.5 NA 10.5 NA 64.60 11/25/2010 7/19/2011 C -16B 2060510 500292043802 45 10.0 0.6 7/19/2011 3.40 C -17B 2040940 500292043902 1 NA 1 NA 6.80 11/13/2010 C -18B 2090710 500292078502 9.6 NA 9.6 NA 69.70 11/23/2010 C -19B 2000050 500292073502 11 NA 11 NA 76.50 10/27/2010 C -20C 2091300 500292074503 1.9 NA 1.9 NA 10.20 11/11/2010 C -21 1820810 500292074503 1.7 NA 1.7 NA 8.50 11/11/2010 C -22A 2060390 500292075801 0.7 NA 0.7 NA 5.10 11/11/2010 C -23C 2081700 500292077503 25 4.0 0.08 7/15/2011 0.85 7/19/2011 C -24A 2040580 500292081601 Sealed NA NA NA NA NA C -25B 2041090 500292081902 0.7 NA 0.7 NA 3.40 11/22/2010 C -26A 1981450 500292083401 0.8 NA 0.8 NA 3.40 11/22/2010 C -278 2031860 500292084302 7.5 NA 7.5 NA 39.10 11/21/2010 C -28B 2100630 500292086702 1 NA 1 NA 5.10 11/21/2010 C -29A 1961700 500292147201 23 10.0 0.9 7/15/2011 6.80 7/19/2011 C -30A 2081690 500292177701 0.2 NA 0.2 NA 1.70 11/20/2010 C -31B 2030080 500292177502 0.8 NA 0.8 NA 5.10 11/22/2010 C -32C 2061390 500292155903 0 NA 0 NA 0.00 11/13/2010 C -33A 2002020 500292237301 1 NA 1 NA 6.80 11/11/2010 C -34A 2060370 500292178501 2.2 NA 2.2 NA 10.20 11/20/2010 C -35B 2061290 500292155302 1.5 NA 1.5 NA 10.20 11/15/2010 C -36A 2000020 500292179001 2 NA 2 NA 10.20 11/13/2010 C -37B 2101000 500292236002 4.7 NA 4.7 NA 30.60 10/28/2010 C -38 1860660 500292157100 0.1 NA 0.1 NA 0.85 11/15/2010 C -39A 2050030 500292238301 1 NA 1 NA 0.85 11/23/2010 C -41A 2041880 500292238501 Sealed NA NA NA NA NA C -42 1930500 500292235700 2.6 NA 2.6 NA 13.60 11/13/2010 STATE OF ALASKA RECEIVEV ` ALASKA ',AND GAS CONSERVATION COMMISSIOW REPORT OF SUNDRY WELL OPERATIONS "``` ;' 1. Operations Abandon ❑ Repair Well ❑ Plug Perforations In Stimulate p �� Ot er Performed: Alter Casing ❑ Pull Tubing ❑ Perforate New Pool ❑ Waiver Time I? t� 'f_l & 'N C"" 6MIBSSWEI Change Approved Program ❑ Operat. Shutdown ❑ Perforate 0 Re -enter Suspended Well ❑ .. '',.: — , 6` 2. Operator BP Exploration (Alaska), Inc. 4. Well Class Before Work: 5. Permit to Drill Number: Name: Development 0 Exploratory ❑ .r 209 -0850 3. Address: P.O. Box 196612 Stratigraphic Service ❑ 6. API Number: Anchorage, AK 99519 - 6612 „ 50- 029 - 20387 -02 -00 8. Property Designation (Lease Number) : 9. Well Name and Number: ADLO- 028305 . PBU C -12B 10. Field /Pool(s): _ PRUDHOE BAY FIELD / PRUDHOE OIL POOL 11. Present Well Condition Summary: Total Depth measured 13004 feet Plugs (measured) 11948 feet true vertical 9028.08 feet Junk (measured) None feet Effective Depth measured 12962 feet Packer (measured) 10248 feet true vertical 9028.12 feet (true vertical) 7793 feet Casing Length Size MD TVD Burst Collapse Structural Conductor 80' 20" 91.5# H -40 29 - 109 29 - 109 1490 470 Surface 2653' 13 -3/8" 72# L -80 28 - 2681 28 - 2662 4930 2670 Production 10930' 9 -5/8" 47# L -80 27 - 10957 27 - 8291 6870 4760 Liner 979' 7" 29# L -80 10402 - 11381 7875 - 8604 8160 7020 Liner 51' 3 -1/2" 9.3# L -80 10344 - 10395 7829 - 7869 10160 10530 Liner 1862' 3- 3/16" 6.2# L -80 10395 - 12257 7869 - 9027 8640 7870 Liner 747' 2 -7/8" 6.16# L -80 12257 - 13004 9027 - 9028 13450 13890 Perforation depth: Measured depth: SEE ATTACHED - _ _ _ - True Vertical depth: _ _ _ Tubing: (size, grade, measured and true vertical depth) 7" 26# L -80 24 - 10314 24 - 7805 4 -1/2" 12.6# L -80 10314 - 10437 7805 - 7902 Packers and SSSV (type, measured and true vertical depth) 4 -1/2" Guiberson Packer 10248 7793 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: 13. Representative Daily Average Production or Injection Data Oil -Bbl Gas -Mcf Water -Bbl Casing Pressure Tubing pressure Prior to well operation: 1,473 76,888 101 1,188 Subsequent to operation: 14. Attachments: 15. Well Class after work: Copies of Logs and Surveys Run Exploratory0 Development 0 Service ❑ Stratigraphic ❑ Daily Report of Well Operations X 16. Well Status after work: Oil 7 0 Gas ❑ WDSPL ❑ GSTOR ❑ WINJ ❑ WAG❑ GINJ ❑ SUSPO SPLUG ❑ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O. Exempt: NA Contact Joe Lastufka Printed N : - • e Las 'Ilk Title Petrotechnical Data Technologist Signa - Ignie Phone 564 -4091 Date 5/11/2011 Form 10-404 Revised 10/2010 RI3DMS MAY 1.3 20' y��e A $794! Submit Original Only C -12B 209 -085 PERF ATTACHMENT Sw Name Operation Date Perf Operation Code Meas Depth Top Meas Depth Base Tvd Depth Top Tvd Depth Base C -12B 9/20/09 PER 12,010. 12,170. 9,025.74 9,030.13 C -12B 9/20/09 PER 12,270. 12,950. 9,027.22 9,028.13 C -12B 3/10/11 BPS •' 11,948. 12,950. 9,013.79 9,028.13 C -12B 4/29/11 APF ✓ 11,770. 11,775. 8,939.75 8,942.44 AB ABANDONED PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG PULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE • MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE • • • C -12B DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS EVENT SUMMARY • 3/10/2011 ICTU 9, 1.75" , 0.134 wall CT. Job Scope: PPROF, Borax MCNL, Mill SELRT, Set CIBP ** *Continued from 3/09/11 * ** Make up & run in w /'HES 3 1/2" CIBP. Tie -in to flag @ 11900'. Set CIBP mid - collar a 11955' mid - element. Stack 2k# and pressure plug to 500 psi to confirm good set. I POOH. Well is FP to 2500 ' w/ water /meth w/ extra 45 bbl diesel cap. Blow down reel. RDMO Job is complete. 3/10/2011 T /I /O =SSV /530/20 Freeze protect flow line (Post coil) Pumped 7 bbls neat methanol and 120 bbls crude down flow line. (WOA procedure) FWHP's =SSV /530/20 ** *Man down drill - what if helper fell while climbing ladder with climbing harness on * ** VALVES in following positions - and operator notified of positions and result of job: Wing closed, Swab closed, SSV closed, Master open, IA open, OA open - Well SI 4/29/201 ** *WELL SHUT -IN ON ARRIVAL * ** ADD PERF INITIAL T /I /O 200/400/0 SSV CLOSED ON ARRIVAL. 'PERFORATED 11770' - 11775' WITH 2" HSD 6 SPF 60 DEGREE PHASED PJ2006 !GUN. ALL SHOTS FIRED. DEPTH CORRECTED TO SLB MEMORY CNL LOG DATED 9- 19 -09. DID NOT TAG TD. HAND OVER WELL TO DSO, LEFT WELL SHUT -IN. FINAL T /I /O 250/400/0. 1 ** *JOB COMPLETE * ** FLUIDS PUMPED BBLS 34 60/40 McOH 45 DIESEL 120 CRUDE 8 NEAT METH 207 TOTAL FLUIDS PUMPED GALS 417 N2 (REEL BLOWDOWN) 417 TOTAL TREE.' CM/ I WELLHEAD = FMC SAFETY NOS: C - 12B CTD DEPTHS ARE ELMD ACTUATOR = OTIS C-12B ORIG KB. ELEV = 62.94' ORIG BF. ELEV = 32.24' - ORIG KOP = 2300' Max Angle = 93° @ 12170' 2004' I—17" OTIS SSSVN, ID = 5.962" 1 Datum MD = 11663 Datum TVD = 8800' SS I 2564' H 9 -5/8" DV PKR I 113 -3/8" CSG, 72 #, L -80, ID = 12.347" H 2681' I Minimum ID = 2.30" @ 10354' MILLED SELRT BUSHING 17" TBG, 26 #, L -80, U4S,.0383bpf, ID = 6.276" H 10278' I I — 10278' I--1 20' PBR I I 10298' I — I9 - 5/8" x 7" GUIBERSON PKR, ID = 3.833" I 10345' 1-14-1/2" OTIS X NIP, ID = 3.813" I 10338' J — I ELMD X NIP (CTD ST) I 10344' H 3 112" DEPLOYMENT SLEEVE ID = 3.00" 10376' I— 4 -1/2" XN NIP, ID -= 3.80" MILLED XX/XX/XX (BEHIND PIPE) 13 -1/2" LNR, 9.3 #, L -80, STL, .0087bpf, ID = 2.992" I 10395' 10402' I� TOP OF 7" BKR LNR HGR I 4 -1/2" TBG, 12.6 #, L -80, HYD,.0152bpf, ID = 3.958" H 10438' 10396' 113 - 1/2" x 3- 3/16" XO, ID = 2.80" I 10438' H4 -1/2" WLEGI I 10433' H ELMD TT LOGGED I 19 -5/8" CSG, 47 #, L -80, ID = 3.958" I---1 10957' MILLOUT WINDOW (C - 12B): 11381' - 11389' 17" LNR, 29 #, L -80, ID = 6.184" I-I 11381' I a 1/7 70 —//77S-. f /77$ . /te F 3 -3/16" LNR, 6.2 #, L -80, TCII, .0076bpf, ID = 2.80" I 12257' = I 11995' I - 13 - 3/2" CIBP (03/10/11) I V 12258' --I3 -3/16" x 2 -7/8" XO, ID = 2.377" I PERFORATION SUMMARY REF LOG: SLB MCNL 09/19/09 ANGLE AT TOP PERF: 83° @ 12010' Note: Refer to Production DB for historical pert data SIZE SPF INTERVAL Opn /Sqz DATE 2" 6 12010 - 12170 C 09/20/09 2" 6 12270 - 12950 C 09/20/09 I PBTD I—I 12964' I .44 12-7/8" LNR, 6.16 #, L -80, STL, .0058bpf, ID = 2.441" H 13004' I DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 12/20/79 ORIGINAL COMPLETION WELL: C-12B 07/20/98 WHITLOA CTD SIDETRACK (C -12A) PERMIT No: 2090850 09/21/09 NORDIC2 CTD SIDETRACK (C -12B) API No: 50 - 029 - 20387 - 11/09/09 DJ /SV DRAFT FINAL SEC 19, T11N, R14E, 555' SNL & 1221' WEL 03/11/11 HJW /PJC SET CIBP (03/10/11) BP Exploration (Alaska) 04/28/11 SChlthitherger NO. 5729 Alaska Data & Consulting Services Company: State of Alaska 2525 Samba Street, Suite 400 Alaska Oil & Gas Cons Comm Anchorage, AK 99503-2838 Attn: Christine Shartzer ATTN: Beth 333 West 7th Ave, Suite 100 Anchorage, AK 99501 Well Job # Log Description Date BL Color CO 15-09A BBKA-00096 PRODUCTION PROFILE ip:g 03/14/11 1 - CP10 1 17-06 BBKA-00094 INJECTION PROFILE () M. f i 46 '''.. A 03/10/11 1 1 ''' ,. 1 11.11=11111111.1111 C-1 2B BAUJ-00064 MEM PRODUCTION PROFILE _ 6-• 03/08/11 1 tO A, ^ lag RE G-23B BLPO-00079 MEM PRODUCTION PROFILE ',_. "I ..., 03/09111 1 , iii .6. , MIIIII1111101721111111111111 BJGT -00022 011111MS-11121:1711111111=111114111E1111•111111=11111=111111 02-18B BLPO-00087 1,11/ .trivirxemmailMIIMIIIPMZZITAIIIIIIIIIIIIIIIIIIIII■MIIIIMI MIIIMINEEEMIIIIMI BJGT El .1111•1111111C3131MilIMMIIIMIIIIMIIIIIIN L-210 BLPO-00086 MEM INJECTION PROFILE . _,Docc eilis frA irg -ImEmscammompim V-105 im S V-220 BLP0-00091 ■ ■ , a ' .10.16,121M. or ,... irowgi=m miraftritiommanIMIIMejra BBSK-00065 INJECTION PROFILE/WFL 1111111•111111MEM1111111 BB0 0-00096 ILJAaa.L*ma.minsvi. . iramt,4. "EM MIIIMESE BCRJ-00073 INJECTION PROFILE - "weisezeiwzro,itAkmErszoniMnimerze - 4 2 _411131111 MIIIIMIEFEEMINIIIIII IZEIZEZtrirCiriAMNIIIIMMEIIMIIIIIEs.1111W-illIEMMIIIIIIIMIIIIMIIIIIN BABJ -00021 1.111=111MEMINIM BAUJ-00077 1/ urpme=gagimpArotTiromminnamanall1=1: 3-05/0-29 BG 4 H -00043 IEIMMIIIir7/2C1/KtbillIlIllMillMIIIIIMMIIIEIEZEMIIIMIIINezMVX;11lEIN•IIIIIMMIIIIIMIMIIM 1111.1.110 BLP0-00092 MEM PRODUCTION PROFILE ' .. TG#12FL, 16 Ted eMIII=EiaIIIIIIMIB!Mri2VIIIIIEMMIMIIIIIIIIMIMMIM 10.1110=1.11111 BBSK- IMIIIMIIIMU1311113LIEMIllriTiVE121111111111=111•11=111■11111111•111 1 1111111111111EMIIIIIIMI BCBE -00113 IZBZE:!IEfffrMNPP/INMIIII•1lMIMMIIIIIWZMEEIIEML INIIIMISE1111=11 BD88-00097 MEM INJECTION PROFILE tirfnrglratMIIMIMIEIRTAMMIMISMINPVK.VMIIIMIMIMMIII.MIM 04-11A AWJI-00134 INJECTION PROFILE OM 0 ° —_. 03/24/11 1 P2-41 BG4H-00044 PRODUCTION PROFILE ' — ,.. 03/22/11 1 illiffirViA 1 .111.11113 BMSA-00009 tc4ih tille•INEMILIMIIIIIIMIIIIIMIIII IIIIIIIIMSEOIIMIIIM BLP0-00087 MEM PRODUCTION PROFILE , - i- AL EiMal1111113111111415S rWIMIKIMIIIIMINNIMIIIIII Z-20 BPSG-00010 GLS iir, , -100 03/29/11 1 ki o - 1 Y-29A BCUE-00122 MEN LDL / 1 3 4) .— Oa 03/20/11 1 .. 1 PLEASE .. 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 Gernbell Street, Suite 400 ST. —.-..r. 900 E Benson Blvd. Anchorage, AK 99503-2838 Il , :• ,1-,t,,. i.,,..t:,,, Pe ." ---, • • BAKER M VaU IES Baker Atlas PRINT DISTRIBUTION LIST COMPANY BP EXPLORATION (ALASKA) INC COUNTY NORTH SLOPE BOROUGH WELL NAME C -12B STATE ALASKA FIELD PRUDHOE BAY UNIT DATE 12/14/2009 I II THIS DISTRIBUTION LIST AUTHORIZED BY: CATRINA GUIDRY SO #: 2770143 Copies of Copies Digital Copies of Copies Digital Each Log of Film Data Each Log of Film Data 2 Company BP EXPLORATION (ALASKA) INC 1 Company DNR - DIVISION OF OIL & GAS Person PETROTECHNICAL DATA CENTER Person CORAZON MANAOIS Address LR2 -I Address 550 WEST 7TH AVE 900 E BENSON BLVD. SUITE 800 ANCHORAGE, AK 99508 ANCHORAGE, AK 99501 1 Company EXXON MOBIL PRODUCTION CO Company Person FILE ROOM Person Address 800 BELL STREET Address EMB GSC 3082A HOUSTON, TX 77002 1 Company STATE OF ALASKA - AOGCC Company Person CHRISTINE MAHNKEN Person Address 333 W. 7TH AVE Address SUITE 100 ANCHORAGE, AK 99501 Company Company Person Person Address Address Company Company Person Person Address Address Data Disseminated By: BAKER ATLAS -PDC 17015 Aldine Westfield, Houston, Texas 77073 This Distribution List Completed By. 09 -0 Page I of 1 1 0 0 INTEQ Log & Data Transmittal Form To: State of Alaska -AOGCC 333 W. 7 Ave. Suite 100 Anchorage, Alaska 99501 Attention: Christine Mahnken Reference: C -12B Contains the following: 1 1 LDWG Compact Disc (Includes Graphic Image files) 1 LDWG lister summary 1 1 color print — GR Directional Measured Depth Log (to follow) 1" 1 color print — MPR/Directional TVD Log (to follow) 1 color print — MPR/Directional Measured Depth Log (to follow) d LAC Job #: 2770143 Sent by: Catrina Guid Date: 12/14/09 n Received by: ' - Date: PLEASE ACKNOWLEDGE RECEIPT BY SIGNING & RETURNING OR FAXING YOUR COPY FAX: (907) 267 -6623 Baker Hughes /fria M 7260 Homer Drive BAKER Anchorage, Alaska 99518 MIMES Direct: (907) 267 -6612 UNTEQ FAX: (907) 267 -6623 , uasad vii at vas cons Comm Anchorage, AK 99503 - 2838 Attn: Christine Mahnken ATTN: Beth 333 West 7th Ave, Suite 100 Anchorage, AK 99501 Well Job # Log Description Date BL Color CD MPI -13 AWJI -00055 SCMT L) C) I - g 10/18/09 1 1 , MPC -07 AXBD -00057 MEM PROD PROFILE j 0 59 4 10/24/09 1 1 _ 04 -11A AWL8 -00040 INJECTION PROFILE ( —1St 10/24/09 J 1 1 C V -220 AYS4 -00100 INJECTION PROFILE UT b (I /$ ` t/3 10/04/09 1 1 L -220 B1JJ -00035 MEM INJ PROFILE (REVISED) Z. . e /9a - t / ii .07/30/09 _ 1 1 V -221 AXBD -00037 MEM INJ PROFILE (REVISED) r) ,0,_.. 0 c -6i3 / / x/3 L -214A AP30 -00064 INJ PROFILE/RST (,n"(" Oat,— / 0 10/06/09 1 1 S -22B AYTU -00052 INJECTION PROFILE T % jq 9-- () t $ / j ' - 10/27/09 1 1 14 -07 8581 -00016 PROD PROFILE /1- -{) (n c., 1 9 / 9 10/27/09 1 1 07 -05 AYS4 -00105 SCMT I '#'A---0 5 / 10/28/09 1 1 R -28 AWL8 -00041 USIT V- p ...(15 /' 5' �f / 10/26/09 1 1 2- 08 /K -16 AZCM -00046 PRODUCTION PROFILE /'S -0 J )'3/ 9 10/30/09 1 1 PSI -05 B14B -00080 TEMP WARMBACK SURVEY 0 ze, 00Z -/,9 ilet)ot 11/03/09 1 1 C -12B B2WY -00030 MCNL . O' -- (l155 15.1,( _ 09/19/09 1 1 U -05A 09AKA0074 OH MWD/LWD EDIT ()T(�_ -p ( ' D 4- 08/19/09 2 1 01 -18A 09AKA0151 OH MWD/LWD EDIT A- C. ` / i')f 08/27/09 4 1 1 H -09 , ANHY -00110 RSTtt, i / 1-6 - '/ s -* - 0 09/20/09 1 PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COPY EACH TO: BP Exploration (Alaska) Inc. Alaska Data & Consulting Services Petrotechnical Data Center t.R2 -1 2525 Gambell Street, Suite 400 900 E. Benson Blvd. Anchorage, AK 99503 -2838 • ( 7-- , ( . . .. ry , RECEIVED STATE OF ALASKA 0 OCT 1 3 2009 ALASKA OIL AND GAS CONSERVATION COMMISSION R WELL COMPLETION OR RECOMPLETION REPORT g asu0ns.CtInmissiin 1 a. Well Status: ® Oil ' ❑ Gas ❑ SPLUG ❑ Plugged ❑ Abandoned ❑ Suspended 1 b. Well Class: Iullurne 20AAC 25.105 20AAC 25.110 ® Development ' ❑ Exploratory ❑ GINJ ❑ WINJ ❑ WAG ❑ WDSPL ❑ Other No. of Completions One ❑ Service ❑ Stratigraphic 2. Operator Name: 5. Date Comp., S or Aband.: 12. Permit to Drill Number: BP Exploration (Alaska) Inc. 9 S /2009 209 - 085 3. Address: 6. Date Spudded: 13. API Number: P.O. Box 196612, Anchorage, Alaska 99519 9/13/2009 y 50 029 - 20387 - 02 - 00 4a. Location of Well (Governmental Section): 7. Date T.D. Reached: 14. Well Name and Number: Surface: 9/16/2009 ✓ PBU C -12B 555' FNL, 1221' FEL, SEC. 19, T11N, R14E, UM 8. KB (ft above MSL): 62.90 r 15. Field / Pool(s): Top of Productive Horizon: 677' FSL, 1740' FEL, SEC. 20, T11N, R14E, UM GL (ft above MSL): 32.74' Prudhoe Bay Field / Prudhoe Bay v Total Depth: 9. Plug Back Depth (MD+TVD): Oil Pool 1257' FSL, 2703' FEL, SEC. 20, T11N, R14E, UM 12962' 9028' 4b. Location of Well (State Base Plane Coordinates, NAD 27): 10. Total Depth (MD +TVD): 16. Property Designation: Surface: x- 664139 y- 5960659 Zone- ASP4 13004' ' 9028' " ADL 028305 i TPI: x- 669001 y- 5956718 Zone- ASP4 11. SSSV Depth (MD +TVD): 17. Land Use Permit: Total Depth: x- 668023 / y- 5957277, Zone- ASP4 None 18. Directional Survey: 181 Yes ❑ No 19. Water depth, if offshore: 20. Thickness of Permafrost (TVD): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1900' (Approx.) 21. Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): 22. Re -Drill /Lateral Top Window MD/TVD: MWD DIR, GR, RES, GR / CCL / CNL 11381' . 8604' 23. CASING, LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT CASING WT. PER FT. GRADE To BOTTOM TOP BOTTOM SIZE CEMENTING RECORD PULLED 20" x 30" Insulated Conductor Surface 110' Surface 110' 36" 12.9 cu vds Permafrost Concrete 13 -3/8" 72# L -80 S rface 2681' Surface 2662' 17 -1/2" 4343 cu ft Arcticset 9 -5/8" 47# L -80 Surface 10957' Surface 8291' 12-1/4" 1673 cu ft Class 'G'. 130 cu ft Arcticset 7" 29# L -80 10402' 11381' 7875' 8604' 8 -1/2" 600 cu ft Class 'G' 3-1/2" x 3- 3/16" 9.2# / 6.2# L -80 10344' 13004' 7829' 9028' 4-1/4" 129 cu ft Class 'G' . x 2 -7/8" / 6.16# 24. Open to production or injection? ® Yes ❑ No 25. TUBING RECORD If Yes, list each interval open (MD +TVD of Top & Bottom; Perforation Size and Number): SIZE DEPTH SET (MD) PACKER SET (MD / ND) 2" Gun Diameter, 6 spf 7", 26# x 4 - 1/2 ", 12.6#, L 10438' 10298' / 7793' MD TVD MD ND 12010' - 12170' 9026' - 9030' 26. ACID, FRACTURE, CEMENT SQUEEZE, ETC. 12270' - 12950' 9027 - 9028' DEPTH INTERVAL (MD) AMOUNT AND KIND OF MATERIAL USED Freeze Protected w/ Diesel 27. PRODUCTION TEST Date First Production: Method of Operation (Flowing, Gas Lift, etc.): October 6, 2009 Flowing Date of Test: Hours Tested: Production For OIL -BBL: GAS -MCF: WATER -BBL: CHOKE SIZE: GAS -OIL RATIO: 10/6/2009 6 Test Period 4 1,569 7,624 18 176 4,860 Flow Tubing Casing Press: Calculated OIL -BBL: GAS-MCF: WATER -BBL: OIL GRAVITY -API (CORR): Press. 1,300 620 24 -Hour Rate $ 6,275 30,496 72 28 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 AAC 250.071. None l09 ($, j RBOMS L OCT 1 2009 .,�. Form 10-407 Revised 07/2009 CONTINUED ON REVERSE / 616. !6. Ol Submit Original Only 29. GEOLOGIC MARKERS (List all formations and •rs encountered): 30. •ORMATION TESTS NAME MD TVD 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 MC 25.071. Zone 3 11508' 8717' None Zone 2C 11594' 8800' Zone 2Bu 11645' 8847' Zone 2BI 11714' 8904' Zone 2A 11816' 8962' Formation at Total Depth (Name): Zone 2A 11816' 8962' 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. 104 Signed: Terrie Hubbl , 64).4 Title: Drilling Technologist Date: PBU C - 12B 209 - 085 Prepared By Name/Number. Terrie Hubble, 564 -4628 Well Number Permit No. / Approval No. Drilling Engineer: Greg Sarber, 564 -4330 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 TVD 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 MC 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 MC 25.071. Form 10 -407 Revised 07/2009 Submit Original Only • I BP EXPLORATION Page 1 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/7/2009 16:30 - 00:00 7.50 MOB P PRE Continue to wait for rig mats for DS 18 pad entrance. Remove adaptor spool on bottom of BOP's. Grease choke & reel valves. Grease BOP HCR valves. Work on BOP bonnet. 9/8/2009 00:00 - 01:45 1.75 MOB P PRE Continue to wait for rig mats. 01:45 - 02:00 0.25 MOB P PRE PJSM regarding moving the rig. 02:00 - 06:00 4.00 MOB P PRE Move rig off of DS 18. Take West Dock Rd to K -Pad Rd. 06:00 - 06:30 0.50 MOB P PRE Crew change at rig. Make change out and rig checks. 06:30 - 12:00 5.50 MOB P PRE Continue rig move. Arrive on C -Pad at 12:00 12:00 - 13:30 1.50 RIGU P PRE Inspect pad. Spot herculite and rig mats. Spot rig over C -12 well & set down. _ Accept rig @ 13:30 13:30 - 14:30 1.00 RIGU P PRE Berm up around rig and spot cuttings box. 14:30 - 18:30 4.00 RIGU P PRE RU on C -12, begin prep tree for injection flange removal. 18:30 - 20:00 1.50 RIGU P PRE Perform walk arounds after crew change out and hold detailed safety meeting regarding NU of stack to swab and removal of injector flange. Discussed hammer wrench safety. 20:00 - 21:20 1.33 RIGU P PRE Begin NU BOPs to swab valve. Load reel into reelhouse and install hardline. 21:20 - 00:00 2.67 RIGU P PRE Cont. NU BOPs to swab and PU swab valve to remove injector flange. Cut down studs to bolt swab back to flow- cross. 9/9/2009 00:00 - 04:00 4.00 BOPSUF P PRE NU BOPE. SLB mech came out to tune injector and control panel. Flood BOP stack. 04:00 - 06:30 2.50 BOPSUF P PRE Begin shell test of BOP stack. Fix leaking graylock on kill line side. Refill stack and restart test. Continue to chase down slow leak. 06:30 - 07:30 1.00 BOPSUF P PRE Pressure test BOPE per AOGCC regulations, well plan and permit to drill_, 250 psi low and 3,500 psi high. All data recorded on roll chart and electronically. Test data emailed to AOGCC, and test witness waived by John Criiss� of AOGCC. 07:30 - 13:00 5.50 BOPSUF P PRE PSI test BOPE Low pressure leak -off during initial BOPE test Call out for 2 -way check to isolate well bore from pressure test @ 10:00am Isolat Choke manifold from tree & pressure test 250psi low / 3500psi high Choke manifold pressure test Good. 13:00 - 14:00 1.00 BOPSUF N SFAL PRE Wait on Valve crew to arrive & install 2 -way check to continue BOPE PSI test 14:00 - 14:10 0.17 BOPSUF N PRE PJSM for setting 2 -way check 14:10 - 14:30 0.33 BOPSUF N PRE Set 2 -way check to complete BOPE test 14:30 - 18:00 3.50 BOPSUF P PRE Pressure test additional BOPE PU test joint, pressure leak -off on upper combies Greased master and started pressure testing BOPE 18:00 - 18:15 0.25 BOPSUF P PRE Perform walkarounds and safety meetings following crew changeout. 18:15 - 19:30 1.25 BOPSUF P PRE Complete BOPE testing. 19:30 - 19:45 0.25 BOPSUF P PRE PJSM with valve crew for loading lubricator and rods to floor Printed: 9/29/2009 11:37:53 AM I • BP EXPLORATION Page 2 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/9/2009 19:30 - 19:45 0.25 BOPSUF P PRE and pulling TWC. 19:45 - 20:45 1.00 BOPSUF P PRE Bring up valve crew lubricator, MU, PT, pull TWC, RD valve crew 20:45 - 21:05 0.33 RIGU P PRE PJSM for pulling coil across and stabbing through injector. 21:05 - 22:20 1.25 RIGU P PRE Hook up grapple line, pull test grapple, remove shipping chains, pull coil across pipe shed roof and stab into injector 22:20 - 22:30 0.17 RIGU P PRE PJSM for bringing BOT tools to floor up beaver slide. 22:30 - 22:40 0.17 RIGU P PRE Bring up GS and accelerator and misc. BOT tools. 22:40 - 22:50 0.17 RIGU P PRE PJSM for installing BOT CTC and booting eline. 22:50 - 0.00 RIGU P PRE Cut to round coil, MU eline Boot, Install BOT CTC. Pull test to 35k, good. Fill reel. 9/10/2009 00:00 - 00:30 0.50 RIGU P PRE Cont. loading reel and circ at -1.0 BPM (bunghole keeps filling) 00:30 - 00:40 0.17 RIGU P PRE PJSM for stabbing on inj and PT. 00:40 - 02:10 1.50 BOPSUF P PRE PT baker CTC to 3500 psi, pass. Stab on injector and PT inner reel valve and packoffs, Pass, pop off injector and PU nozzle assy. 02:10 - 03:00 0.83 RIGU P PRE Stab on and RIH to 3850' with BOT CTC, 5' Stinger, DBPV, 3" Nozzle. 03:00 - 05:00 2.00 RIGU P PRE Start circ out diesel FP to TT at 2.8 BPM. after several min MM OUT rate increases, shut down and flow continues then drops off, start circ again and catch returns, returns start exceeding IN MM again, step WH pressure up with choke to 350 psi, take gas returns to TT. SI well while waiting on fluid transfer, WH climbs to 400 psi. Strip in -hole 200', WH increases to 450 psi, bleeds down to 420 psi. 05:00 - 06:00 1.00 KILL N DECOMP RIH to 10,300', .65 BPM IN, holding 420 psi WH venting gas. 06:00 - 08:15 2.25 KILL N DECOMP Empty Tiger tank to continue well kill operations 08:15 - 08:30 0.25 KILL N DECOMP Circulate out gas @ 3bpm, circulating pressure 2400psi, WH pressure 460psi 08:30 - 08:40 0.17 KILL N r DECOMP Shut down pumps & shut in well to inspect Tiger tank lines 08:40 - 09:30 0.83 KILL N DECOMP Circulate out gas @ 3bpm, circulating pressure 2500psi, WH pressure 500psi Slow pumps down to 1 bpm, circulating pressure 340psi, WH Pressure 440psi Stop pumps & monitor WH Pressure, WH pressure @ 330psi Shut in well @ 09:05 & monitor Well Bring pumps on @ lbpm with well shut in WH 370psi, Circ pressure 220psi Open choke to 1/4, WH 285psi, Circ 140psi Open choke to 1/2, WH 250psi, Circ 105psi Stop pumps & shut in well WH @ 250psi 09:30 - 10:45 1.25 KILL N DECOMP Line up to bullhead well Bull head well @ 7bpm, pumped 17bbls, WH Pressure 1700psi Shut down pumps Open choke & bleed WH pressure down to 150psi out to Tiger tank Close choke & Bull head well @ 3bpm, pumped 8bbls, WH pressure 1100psi Shut down pump and wait for fluid and gas to swap Open choke & bleed WH pressure down to 209psi out to Tiger tank Close choke & Bull head well @ 3bpm, pumped 3bbls, WH Printed: 9/29/2009 11:37:53 AM • BP EXPLORATION Page 3 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/10/2009 09:30 - 10:45 1.25 KILL N DECOMP pressure 1400psi Shut down pump and wait for fluid and gas to swap Open choke & bleed WH pressure down to 235psi out to Tiger tank 10:45 - 12:15 1.50 KILL N DECOMP Line up to pump down coil & take returns to Tiger tank With chokes closed pump @ 1bpm, bring WH 1100psi Open choke & bleed pressure to 500psi Bring up pumps to 1bpm, WH @ 500psi, Circ 670psi returns to Tiger Shut down pumps & shut in well, WH 500psi Open chokes & bleed pressure to 350psi Bring up pumps to 1bpm, WH @ 350psi, Circ 450psi returns to Tiger Shut down pumps & shut in well to check Tiger tank level 12:15 - 13:30 1.25 KILL N DECOMP Empty Tiger tank to continue well kill operations 13:30 - 14:30 1.00 KILL N DECOMP Open chokes & Circ to Tiger tank Pump @ 2bpm, WH 1000psi, Circ 2100psi returns to Tiger Returns established @14:30 14:30 - 17:45 3.25 KILL N DECOMP Start pumping BU Pump rate 2bpm, WH 1000psi, Circ 2200psi Circulate 69bbls Shut down and close in well to move off Vac truck & strap Tiger Bring pump on and open chokes Pump rate 2bpm, WH 1000psi, Circ 2200psi Shut down to empty Tiger tank Bring pump on and open chokes Pump rate 2bpm, WH 1000psi, Circ 2200psi Bleed WH pressure to zero @ 17:45 and monitor well 17:45 - 18:30 0.75 KILL N DECOMP Flow check well, no flow. 18:30 - 21:00 2.50 KILL P DECOMP POOH while pumping at 2.45 BPM with steady returns. 21:00 - 21:10 0.17 KILL P DECOMP Stop at 1000' and flow check, small dribble, bleed off gas from lubricator, no flow. 21:10 - 21:25 0.25 KILL P DECOMP POOH to surface. Tag up. 21:25 - 21:35 0.17 KILL P DECOMP PJSM for LD BHA 21:35 - 21:50 0.25 FISH P DECOMP Unstab, LD BHA, and fix 4 way sling on injector. 21:50 - 22:00 0.17 FISH P DECOMP PJSM for picking up fishing BHA 22:00 - 23:00 1.00 FISH P DECOMP PU fishing BHA while pumping forward over bung, pull out 20' of wire and cut/boot. 23:00 - 00:00 1.00 FISH P DECOMP Stab on and RIH with BOT CTC, XO, 2 jts 2 -3/8" PH6, XO, DFCV, Intensifier, XO, XO, 2 2 -7/8" Drill Collars, XO, XO, Oil Jars, Disco, Rupture Disk, 4" GS Spear. Total BHA length 148.01' 9/11/2009 00:00 - 00:50 0.83 FISH P DECOMP Cont RIH to 10,300' pumping 2.45 BPM 00:50 - 01:00 0.17 FISH P DECOMP PU and wt check, 46K @ 0.0 BPM. RIH wt check 23K. Ease in hole till set down at 10,374' (uncorrected). Begin slowly picking up to straight pull, break over at 52k. Continue PU. 01:00 - 05:30 4.50 FISH P DECOMP Establish circulation at 1.5 BPM, POOH. Start flowing gas out at 500', circ out gas, catch returns. Tag up. 05:30 - 05:40 0.17 FISH P DECOMP Flow check well and PJSM for unstabbing injector, no flow. 05:40 - 06:30 0.83 FISH P DECOMP Unstab injector and LD fishing BHA. 06:30 - 09:20 2.83 FISH P DECOMP LD 2 -7/8" STL liner in pipe shed 32jts & 1- 26.3' cut jt Printed: 9/29/2009 11:37:53 AM • • BP EXPLORATION Page 4 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/11/2009 09:20 - 10:00 0.67 WHIP P WEXIT Prep rig floor for drift run & PDS log with slickline 10:00 - 10:15 0.25 WHIP P WEXIT Offload 2 -7/8" STL liner from pipe shed 10:15 - 10:45 0.50 WHIP P WEXIT Wait on slickline crew for drift run & PDS log 10:45 - 11:05 0.33 WHIP P WEXIT PJSM for Spotting, PU & RU of slickliners 11:05 - 13:45 2.67 WHIP P WEXIT Spot, PU & RU slickliners 13:45 - 15:50 2.08 WHIP P WEXIT RIH for WS drift run to 11,412' Tight spots @ 10,275' & 10,440' was able to work thru spots with minimal effort. POOH 15:50 - 17:15 1.42 WHIP P WEXIT LD WS drift BHA & PU PDS Caliper BHA 17:15 - 21:00 3.75 WHIP P WEXIT MU & RIH with PDS caliper tools, caliper log upwards and POOH. 21:00 - 21:15 0.25 WHIP P WEXIT PJSM for breaking down slickline tools and RD 21:15 - 21:35 0.33 WHIP P WEXIT Break down caliper BHA and offload PDS memory sonde. Wait on data check. 21:35 - 22:15 0.67 WHIP P WEXIT RD Slickline crew and offload tools. 22:15 - 22:30 0.25 WHIP P WEXIT PJSM for stabbing on injector, pumping back, cutting coil. 22:30 - 00:00 1.50 WHIP P WEXIT Stab on inj, pump slack into coil at 3.25 bpm, unstab, cut off CTC, RU hydraulic cutter and cut off 359' of coil to find wire, meg test good. Begin installing CTC and heading up eline. 9/12/2009 00:00 - 01:00 1.00 WHIP P WEXIT Finish installing SLB CTC and BHI UQC. Move injector over bunghole and circulate slack forward at 3.0 bpm and offload cut coil. 01:00 - 01:35 0.58 WHIP P WEXIT Load 4 -1/2" x 7" Gen II whipstock to floor and SLB installs 2 pip tags 10.0' from TOWS 01:35 - 03:15 1.67 WHIP N SFAL WEXIT Circ and build bio in pits while waiting on detailed PDS results due to suspected debris in whipstock interval. 03:05 - 03:20 0.25 WHIP P WEXIT PJSM for picking up whipstock and inteq BHA and stabbing on injector. 03:20 - 04:10 0.83 WHIP P WEXIT PU whipstock setting BHA and BHI coiltrack tools and stab on well. 04:10 - 06:30 2.33 WHIP P WEXIT RIH with SLB CTC, XO, UQC /LQC, SWP, P &C, EDC, DPS, DGS, HOT, XO, XO, Baker hyd setting tool, BTT Genll 4 -1/2" x 7" whipstock. Total BHA length = 80.58' 06:30 - 07:15 0.75. WHIP P WEXIT Log tie in From 11,300' to 11,358' with a -22' correction Correct depth to 11,336' & RIH to WS setting depth pressure up & shear WS @ 3,350psi Set WS @ 11,392.5' putting TOWS @ 11,375' Stack 7k WOB WS held 07:15 - 09:00 1.75 WHIP P WEXIT POOH While POH Hold PJSM for LD of WS running BHA & PU / MU of milling assy BHA 09:00 - 09:45 0.75 WHIP P WEXIT LD WS running BHA 09:45 - 11:00 1.25 WHIP P WEXIT PU & MU of window milling BHA 11:00 - 13:40 2.67 WHIP P WEXIT RIH Log tie in from 11,335' to 11,368' with -22' correction Reset depth to 11,346' RIH & tag pinch point @ 11,381.4' 13:40 - 00:00 10.33 STWHIP P WEXIT PU and bring up pumps 2.5bpm, FS 1,950psi Time mill window @ 1fph, Circ psi 2,100psi, WOB 1.8k - 2.2k at 11,383.7', pressure climbs to 2450 psi, WOB 3.0k at 11,384.5', max pressure at 2870 psi, WOB 3.0k Printed: 9/29/2009 11:37:53 AM • • BP EXPLORATION Page 5 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/12/2009 13:40 - 00:00 10.33 STWHIP P WEXIT at 11,384.9', returns to 2500 psi, WOB 2.1k at 11,388.5', MW spike, 2900 psi, WOB 1.5k WOB and motor work drills off, as continue time milling 1ft/hr from 11,388.5 to 11390.1' 9/13/2009 00:00 - 03:10 3.17 STWHIP P WEXIT Cont. time milling 1ft/hr to 11,391.4' (10' from pinch point). Drill ahead for 10' of rathole to 11397.9' while circulating down 10 bbl high -vis sweeps at 2560 psi, 2.5 bpm, 450 WOB Window from 11,381.4' to 11,388.5' Ream through window twice, dry drift. 03:10 - 03:40 0.50 STWHIP P WEXIT Circulate remaining high -vis sweep to bit and open EDC. 03:40 - 06:15 2.58 STWHIP P WEXIT Circ sweep at 4.5 bpm and begin POOH. Jog in hole below tubing tail and above 4 -1/2" tubing to aid in hole cleaning PJSM for LD of Milling assy & PU of build assy while POH 06:15 - 07:15 1.00 STWHIP P WEXIT LD milling BHA 07:15 - 11:30 4.25 DRILL P PROD1 PU / MU build BHA w/ 2.4 deg AKO and HYC "button" bit & RIH Log tie in from 11,290' to 11,313' with -24' correction Reset depth to 11,289' & RIH Ran in & out of window with no weight change Dry tag bottom @ 11,402' PU to 11,355' & Circulate Geo -Vis to bit 11:30 - 14:30 3.00 DRILL P PROD1 RIH & Drill build section as per Geo & DD FS 1,540', 2.5bpm, Circ 2,000psi Stop drilling Q 11 431' & Pl l through window to check DGS DGS checks OK RIH & Drill build section as per Geo & DD FS 1,540', 2.5bpm, Circ 2,100psi Drill to 11,480' Problem with communication with DGS POOH 14:30 - 17:45 3.25 DRILL N DEAL PROD1 POOH to check tools 17:45 - 18:15 0.50 DRILL P PROD1 Walk arounds and PJSM for unstabbing injector and LD /PU BHA section. 18:15 - 19:45 1.50 DRILL N DFAL PROD1 Unstab injector and LD BHA #5, swap out DGS, HOT, MU new 2.5 deg AKO mtr and re -run same HYC "button" bit. Stab on injector. Catwalk testing showed DGS had bad accelerometer, may have caused incorrect reference highside for BHA #5. 19:45 - 22:10 2.42 DRILL N DFAL PROD1 Open EDC and RIH to 11,210' circulating at 4.4 bpm with BHA #6, CTC, CoilTrack, 2.5 deg Mtr, 4.125" HYC SRR bi- center bit. Total length 65.90' 22:10 - 22 :35 0.42 DRILL P PROD1 Close EDC and Log downwards from TSGR through window circ min rate as per Geo. 22:35 - 00:00 1.42 DRILL N SFAL PROD1 Inteq is having computer troubles. Wait for computers to re -boot. 9/14/2009 00:00 - 02:00 2.00 DRILL P PROD1 Baker Fixed computers. Cont. logging downward and out the window to tie -in whipstock and window ( -23' correction). 02:00 - 04:55 2.92 DRILL N SFAL PROD1 Baker computers not working correctly, jog pipe while waiting on troubleshooting and repair. 04:55 - 05:30 0.58 DRILL P PROD1 RIH to bottom 05:30 - 07:20 1.83 DRILL P PROD1 Drill build as per Geo & DD FS 2,150psi, 2.8bpm, Circ 2,280psi Drill to 11,548' HOT not working 07:20 - 10:00 2.67 DRILL N DFAL PROD1 POOH to swap HOT Printed: 9/29/2009 11:37:53 AM • • BP EXPLORATION Page 6 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/14/2009 07:20 - 10:00 2.67 DRILL N DFAL PROD1 open EDC & continue to POOH Conduct PJSM for HOT swap while POOH 10:00 - 10:30 0.50 DRILL N DFAL PROD1 LD BHA & swap HOT Bit missing diamond on cutter in pilot and several chipped cutters on gauge Bit graded @ 3-1-BT-N-X--CT-DTE 10:30 - 11:45 1.25 DRILL N DFAL PROD1 PU / MU BHA with new HOT & used HYC button bit 11:45 - 14:00 2.25 DRILL N DFAL PROD1 Open ECD & RIH @ 2bpm Slow pumps to 1 bpm @ 3,800' 14:00 - 14:10 0.17 DRILL N DFAL PROD1 Log tie in from 11,210' to 11,242' with -25' correction Reset depth to 11,217' 14:10 - 14:30 0.33 DRILL N DEAL PROD1 RIH to TD tag bottom @ 11,549' 14:30 - 19:00 4.50 DRILL P PROD1 Drill build as per Geo & DD FS 2,200psi, 2.5bpm - 2.8bpm, Circ 2,150psi - 2,500psi, WOB .5k - 2k 19:00 - 21:05 2.08 DRILL P PROD1 Cont. Drilling from 11,650', IA 345 psi, OA 243 psi. 2.59 in/ 2.60 out, FS 2,075psi, Circ 2,100 - 2,400 psi, BHP 4100 psi, 9.04 ECD, DHWOB 3.9k, ROP 30 -50 fph 21:05 - 21:40 0.58 DRILL P PROD1 100k LSRV pill out bit, PU and wiper from 11,700' to window at 11,390', RIH to btm. 21:40 - 00:00 2.33 DRILL P PROD1 Drilling ahead from 11,700', IA 212 psi, OA 111 psi. 2.61 in/ 2.62 out, FS 2,050psi, Circ 2,200 - 2,500 psi, BHP 4155 psi, 9.07 ECD, DHWOB 1.9 -3.2k, ROP 45 -70fph 9/15/2009 00:00 - 01:25 1.42 DRILL P PROD1 Drilling ahead from 11,784', IA 228 psi, OA 225 psi. 2.69 in/ 2.67 out, FS 2,200psi, Circ 2,450 - 2,500 psi, BHP 4180 psi, 9.08 ECD, DHWOB 1.7 -5.9k, ROP 20 -70fph Drill to 11,850' 01:25 - 02:05 0.67 DRILL P PROD1 High -vis sweep to bit, Wiper from 11,850' to 11,390', RIH to TD. 02:05 - 04:05 2.00 DRILL P PROD1 Drilling ahead from 11,850', IA 249 psi, OA 275 psi. 2.60 in/ 2.62 out, FS 2,050psi, Circ 2,200 - 2,450 psi, BHP 4226 psi, 9.12 ECD, DHWOB 1.1 -2.5k, ROP 60- 120fph Drill to 12,000' 04:05 - 05:45 1.67 DRILL P PROD1 Wiper from 12,000' through the window, Open EDC and jet out 7" from window to 10,100 at 4.3 bpm, Jogging pipe in hole above and below the 4 -1/2" tubing. Run back in hole to TD. 05:45 - 06:10 0.42 DRILL P PROD1 Log for GR tie in @ 11,180 ft formation marker with + 3 ft correction Close EDC 06:10 - 06:30 0.33 DRILL P PROD1 Continue to wiper in with Op = 2.5 bpm @ 1975 psi 06:30 - 07:15 0.75 DRILL P PROD1 Drill ahead from 12,000 ft to 12,030' 2.60 in/ 2.62 out, FS 2,050psi, Circ 2,200 - 2,450 psi, BHP 4000 psi, 8.8 ECD, DHWOB 1.1 -2.5k, ROP 60- 120fph 07:15 - 11:00 3.75 DRILL P PROD1 POOH to 11,330' & open EDC increase pump rate to 4.5bpm for hole cleaning in 7" POOH to 10,400' Jog to 10,470' POOH to 10,273' Jog to 10,350' POOH to Surface & Jog to 500' POOH Conduct PJSM for LD of build BHA 11:00 - 11:20 0.33 DRILL P PROD1 Unstab injector & LD Build BHA Bit graded @ 2- 1- WT- N- X -I -NO -BHA Drilled 46' of Zone 3 & 482' all together with avg ROP of Printed: 9/29/2009 11:37:53 AM • • • BP EXPLORATION Page 7 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/15/2009 11:00 - 11:20 0.33 DRILL P PROD1 36.85fph 11:20 - 11:45 0.42 DRILL P PROD1 Function test BOPE 11:45 - 12:00 0.25 DRILL P PROD1 SLB repairing reel pop -off 12:00 - 12:15 0.25 DRILL P PROD1 PJSM for PU of Lateral BHA 12:15 - 12:50 0.58 DRILL P PROD1 PU Lateral BHA 1.2deg motor & Hughes RWD2ST304375 bit 12:50 - 14:40 1.83 DRILL P PROD1 RIH with lateral BHA assy to 11,230' 14:40 - 14:50 0.17 DRILL P PROD1 Log tie in from 11,230' to 11,254' with -26' correction Reset depth to 11,228' 14:50 - 15:35 0.75 DRILL P PROD1 RIH to TD tag bottom @ 12,030' 15:35 - 17:05 1.50 DRILL P PROD1 Drill ahead from 12,030' to 12,097' Featherd new bit in @ 1.5bpm for a' 2.66bpm, FS 2,050psi, Circ 2,400 - 2,600 psi BHP 4200 psi, 9.16 ECD DHWOB 1.1 -2.5k, ROP 60 -90fph 17:05 - 19:25 2.33 DRILL P PROD1 Conduct MAD pass from 12,096' to 11,400' 19:25 - 20:05 0.67 DRILL P PROD1 RIH to 12,096' 20:05 - 21:25 1.33 DRILL P PROD1 Drilling ahead from 12,097', IA 311 psi, OA 131 psi. 2.60 in/ 2.59 out, FS 2,300 psi, Circ 2,400 - 2,750 psi, BHP 4288 psi, 9.20 ECD, DHWOB 1.5 -2.3k, ROP 120- 160fph Drill to 12,250' 21:25 - 22:25 1.00 DRILL P PROD1 Wiper from 12,250' to 11,390' 22:25 - 23:30 1.08 DRILL P PROD1 Drilling ahead from 12,250', IA 321 psi, OA 153 psi. 2.59 in/ 2.59 out, FS 2,300 psi, Circ 2,400 - 2,550 psi, BHP 4318 psi, 9.27 ECD, DHWOB 1.2 -2.0k, ROP 120- 170fph Drill to 12,400', send 25 bbl high -vis pill downhole 23:30 - 00:00 0.50 DRILL P PROD1 Wiper from 12,400' to 11,390' 9/16/2009 00:00 - 00:35 0.58 DRILL P PROD1 CONTINUE WIPER TRIP TO BTM 00:35 - 01:40 1.08 DRILL P PROD1 DRILLING AHEAD FROM 12,400', IA 332 PSI, OA 172 PSI. 2.62 IN/ 2.61 OUT, FS 2,289 PSI, CIRC 2,450 - 2,650 PSI, BHP 4338 PSI, 9.31 ECD, DHWOB 1.5K, ROP 155 -220 FPH, STARTING TO GET STICKY, ONE 4K OVERPULL WHILE PICKING UP. BOTTOM FELL OUT AT 12,505' DRILLS 270 fph W/ 0.5K WOB. DRILL TO 12,550' 01:40 - 03:35 1.92 DRILL P PROD1 WIPER FROM 12,550' TO 10,100', OPEN EDC AT 11,365' AND CIRC 4.25 BPM, JOG PIPE BELOW AND ABOVE 4.5" TUBING. 03:35 - 03:50 0.25 DRILL P PROD1 LOG TIE -IN PASS FROM 11,205' TO 11,230' ( +3' CORRECTION) 03:50 - 04:33 0.72 DRILL P PROD1 CONT WIPER, NOTE INCREASED CUTTINGS ACROSS SHAKER, CLOSE EDC AT WINDOW, RIH TO BTM. 04:33 - 04:45 0.20 DRILL P PROD1 DRILLING AHEAD FROM 12,550', IA 363 PSI, OA 247 PSI. 2.61 IN/ 2.62 OUT, FS 2,350 PSI, CIRC 2,700 - 2,850 PSI, BHP 4322 PSI, 9.27 ECD, DHWOB 1.5K, ROP 180 -120 FPH DRILL TO 12,635' 04:45 - 05:40 0.92 DRILL P PROD1 PU AFTER STALL, FS 2700 PSI, MAY HAVE PLUGGED JET, DRILL AHEAD, PU AND ROLL PUMPS UP /DOWN, SEE JET CLEAR DRILLING AHEAD FROM 12.635'.IA 366 PSI, OA 243 PSI. 2.61 IN/ 2.62 OUT, FS 2,430 PSI, CIRC 2,600 - 2,750 PSI, BHP 4328 PSI, 9.30 ECD, DHWOB 0.5K, ROP 155 -220 FPH Printed: 9/29/2009 11:37:53 AM • BP EXPLORATION Page 8 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/16/2009 04:45 - 05:40 0.92 DRILL P PROD1 DRILL TO 12,700' 05:40 - 07:40 2.00 DRILL P PROD1 WIPER FROM 12,700' TO WINDOW 07:40 - 09:40 2.00 DRILL P PROD1 DRILLING AHEAD FROM 12,700', IA 375 PSI, OA 123 PSI. 2.7BPM FS 2,450 PSI, CIRC 2,500 - 2,850 PSI BHP 4340 PSI, 9.3 ECD WOB .8K - 1.5K, ROP 80 -120 FPH DRILL TO 12,865' 09:40 - 11:40 2.00 DRILL P PROD1 WIPER FROM 12,865' TO WINDOW 11:40 - 13:00 1.33 DRILL P PROD1 DRILLING AHEAD FROM 12,865', IA 385 PSI, OA 215 PSI. 2.8BPM FS 2,500 PSI, CIRC 2,700 - 2,850 PSI BHP 4350 PSI, 9.3 ECD WOB .8K - 1.9K, ROP 80 -120 FPH pRILL TO 12,997' COIL WT STACKING, PU @ 52K DID BHA WIPER n T RIH & STACKED OUT 12,900' PU @ 62K, DRAGED UP .J o HOLE FOR ABOUT 50 FT ^ p 13:00 - 13:45 0.75 DRILL P PROD1 WIPER TO 12,500 FT , " 13:45 - 13:50 0.08 DRILL P PROD1 DRILL AHEAD FROM 12,996' TO 13,000' TD CALLED BY GEO @ 13,000' 13:50 - 15:45 1.92 DRILL P PROD1 PUMP 2OBBL HIGH VIS PILL 200K LSRV PILL & WIPER TO WINDOW 15:45 - 17:20 1.58 DRILL N RREP PROD1 FIX PUMP 2 POP -OFF STILL ABLE TO CIRCULATE WHILE DOING WIPER BUT @ 3.2BPM 17:20 - 20:20 3.00 DRILL P PROD1 PUH to 4 -1/2" TT, JOG TO WINDOW, CONTINUE WIPER TO SURFACE AT 60 FPM, 4.65 BPM 20:20 - 20:45 0.42 DRILL P PROD1 JOG AT SURFACE, NOT MUCH MORE CUTTINGS THAN USUAL, MORE RUBBER THAN BEFORE. 20:45 - 22:50 2.08 DRILL P PROD1 RIH 22:50 - 23:05 0.25 DRILL P PROD1 LOG TIE -IN PASS FROM 11,200' TO 11,223', +3' CORRECTION. 23:05 - 23:24 0.32 DRILL P PROD1 PUH ABOVE 4 -1/2" TBG TO 10,250' 23:24 - 23:50 0.43 DRILL P PROD1 LOG CCL OF 4 -1/2" TBG DOWN TO 10,500' 23:50 - 00:00 0.17 DRILL P PROD1 RIH, CLOSE EDC ABOVE WINDOW, RIH CIRCULATING AT 2.62 BPM 9/17/2009 00:00 - 01:08 1.13 DRILL P PROD1 RIH AND TAG TD TWICE @ 13004' 01:08 - 06:30 5.37 DRILL P PROD1 POOH LAYING IN LINER PILL, PULL THROUGH WINDOW WITH PUMPS AT 0.3 BPM KEEPING FLUID IN A NET UPWARD FLOW. OPEN EDC INSIDE WINDOW, PUMP ALTERNATING 30 BBL LOW -VIS /HIGH -VIS SWEEPS OUT EDC, POOH CIRC AT 4.25 BPM. PAINTED FLAG AT 8,000' (7,922' EOP) JOG BACK IN HOLE NEAR SURFACE 06:30 - 06:45 0.25 DRILL P PROD1 PJSM FOR LD OF LATERAL BHA 06:45 - 07:30 0.75 DRILL P PROD1 LD LATERAL BHA BIT GRADED @ 3- 1- BT- N- X- I -CT -TD 07:30 - 07:45 0.25 DRILL P PROD1 PJSM TO PUMP & CUT SLACK 07:45 - 08:30 0.75 DRILL P PROD1 PUMP & CUT 310' OF SLACK 08:30 - 08:45 0.25 DRILL P PROD1 PJSM FOR PU OF BTT TOOLS TO RIG FLOOR, MU BTT CTC, & RU FOR LINER RUN Printed: 9/29/2009 11:37:53 AM • • BP EXPLORATION Page 9 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/17/2009 08:45 - 08:55 0.17 DRILL P PROD1 PU BTT TOOLS TO RIG FLOOR 08:55 - 09:25 0.50 DRILL P PROD1 MU BTT CTC PULL & PRESSURE TEST CTC 09:25 - 10:05 0.67 DRILL P PROD1 RU FLOOR FOR LINER RUN 10:05 - 10:35 0.50 DRILL P PROD1 PJSM FOR RUNNING LINER 10:35 - 17:30 6.92 DRILL P PROD1 PU -2650' of 2 -7/8" x 3- 3/16" LINER & LINER RUNNING BHA STAB ON INJECTOR 17:30 - 20:15 2.75 CASE P RUNPRD RIH WITH LINER BHA CIRC @ MIN PUMP RATE. WT CHECK @ 11,300', 48.5k TAG PBTD @ 13,033' (UNCORRECTED) PU WT CHECK 53K RETAG PBTD @ 13,033' 20:15 - 00:00 3.75 CASE P RUNPRD LOAD 5/8" STEEL BALL, LAUNCH AWAY @ 1800 psi, CIRC BALL TO SEAT AT 1.8 BPM, SLOW DOWN TO .64 BPM @ 35 BBLS AWAY, BALL LANDS @ 44.1 BBLS,SHEARED SEAT OUT AT 2,880 PSI. PU TO BREAKOVER @ 13,030.8', PU 4' MORE TO 13,026.9', PU WEIGHT = 38K. SD TO 13,034.8' AND STACK 10K DOWN SWAP WELL OVER TO 2% SLICK KCL @ 2.73 BPM, 1250 PSI. 9/18/2009 00:00 - 02:20 2.33 CASE P RUNPRD CONTINUE SWAPPING WELL OVER TO 2% DOUBLE SLICK KCL @ 2.73 BPM IN / 2.72 OUT, 1300 PSI. RATE CHECK @ 1.5 BPM = 980 PSI. PJSM WITH CEMENTING CREW WHILE CIRC OVER WELL TOTAL KCL CIRCULATION = 670 BBLS ( -1.5 CIRC VOL) 02:20 - 02:35 0.25 CEMT P RUNPRD BATCH MIX UP 30 BBLS OF 15.8 PPG CLASS G CEMENT. CEMENT UP TO WEIGHT AT 02:35 02:35 - 03:00 0.42 CEMT P RUNPRD PUMP BIO TO HARDLINE IN REEL HOUSE LINE UP CEMENTERS TO REEL IRON AND FLOOD LINES PT TO 4000 PSI, ISOLATE FROM MM & PT TO 5500 PSI 03:00 - 04:15 1.25 CEMT P RUNPRD IN OUT IN MM OUT PRESS 1.97 1.97 5.00 4.80 1200 1.95 1.93 10.00 9.50 1470 1.88 1.86 15.00 14.60 1620 1.94 1.91 20.00 19.40 1501 1.95 1.92 23.00 23.10 1490 CEMENT LOADED IN REEL, ZERO IN MM, BEGIN DISPLACING WITH BIO 2.38 0.98 0.00 25.90 1245 2.48 1.57 5.00 28.40 1100 2.39 2.35 10.00 31.80 1608 2.43 2.43 15.00 36.80 1460 2.43 2.43 30.00 51.80 1800 2.42 2.42 40.00 61.80 1465 (LEAD CEMENT AT SHOE, ZERO OUT MM) 2.40 2.40 49.00 0.00 1458 2.00 2.30 50.00 1.00 817 0.40 1.00 51.00 2.60 62 SHUT DOWN PUMPS, PU TO BREAK OVER @ 13,030' + 12' TO 13,018. PU WT = 36K. CIRCULATE 5 BBLS 1.44 0.98 53.00 4.00 864 1.45 1.40 56.00 6.70 850 OPEN BAKER CHOKE, RIH AND STACK 10K DOWN, Printed: 9/29/2009 11:37:53 AM BP EXPLORATION Page 10 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/18/2009 03:00 - 04:15 1.25 CEMT P RUNPRD CLOSE BAKER CHOKE, BRING UP PUMPS TO SHEAR OUT PLUG, PRESSURE BREAKS OVER AT 900 PSI, ROLL PUMPS FOR 1.50 BBLS WITH NO PRESSURE BUILD UP 56.30 7.40 900 57.80 8.60 850 DECIDE TO UNSTING AGAIN, PICK UP TO 12,005' (BREAK OVER + 25'), OPEN BAKER CHOKE, RIH AND STACK 10K DOWN, CLOSE BAKER CHOKE, START PUMPING, PRESSURE RISES TO -1000 PSI WITH NO BREAKOVER AS WE KEEP PUMPING, DECIDE PLUG MUST HAVE SHEARED AT SOME POINT, BEGIN DISPLACING PLUG AT 1.0 BPM 59.10 8.60 1.09 1.01 60.00 10.20 1033 1.06 1.03 62.50 11.80 1117 1.07 1.07 65.00 14.20 1161 1.04 1.06 68.00 17.20 1267 70.20 19.80 3100 PLUG LANDED AT 70.20 ON IN MM (4.52 BBLS EARLY) 04:15 - 07:00 2.75 CEMT P RUNPRD BEGIN POOH REPLACING VOIDAGE, STOP AND CHECK CIRC PRESSURE FOR REFERENCE, 1.0 BPM = 850 PSI, CONT POOH, FLUFF UP ANY POSSIBLE EXHAUSTED CEMENT FROM 9300' TO 9600', CONT POOH. 07:00 - 07:15 0.25 CEMT P RUNPRD PJSM FOR LD OF SELRT BHA 07:15 - 07:40 0.42 CEMT P RUNPRD LD SELRT BHA 07:40 - 09:30 1.83 CLEAN P CLEAN RU FOR CLEANOUT OPERATIONS & FIX LEAK IN CHINA CAP 09:30 - 09:45 0.25 CLEAN P CLEAN PJSM FOR MU OF CLEANOUT BHA 09:45 - 12:00 2.25 CLEAN P CLEAN MU CLEANOUT BHA WITH 2.3" MILL WITH BACK CUTTERS 12:00 - 13:30 1.50 CLEAN P CLEAN RIH WITH CLEANOUT BHA TAG BUSHING @ 10,378.9' FS 959PSI, CIRC 1330PSI 1.1BPM 13:30 - 14:20 0.83 CLEAN P CLEAN MILL LWP BUSHING FS 959PSI, CIRC 1000PSI - 1330PSI 1BPM - 1.1BPM 14:20 - 15:30 1.17 CLEAN P CLEAN RIH TO PBTD TAG @ 12,985' ZERO OUT MICRO MOTION 15:30 - 18:00 2.50 CLEAN P CLEAN PUMP BOTTOMS UP & POOH @ 1BPM PUH to TOL 18:00 - 18:30 0.50 CLEAN P CLEAN CREW CHANGE, WALK AROUNDS AND PJSM FOR PUMPING A 1/2" BALL. 18:30 - 20:45 2.25 CLEAN N CLEAN LOAD BALL INTO REEL USING RUBBER HOSE AND LAUNCH AWAY AT 1,400 PSI, CIRC @ 1.6 BPM, BALL NOT HERD MOVING, ROLL REEL OVER, NO BALL HERD, RELAUNCH @ 2,200 PSI AND PUMP 1.6 BPM, BALL ROLLING, HEAR BALL LEAVE REELHOUSE @ 31 BBLS AWAY, SLOW DOWN TO .6 BPM @ 45 BBLS AWAY, BALL NOT ON SEAT AT 60 BBLS, JOG BHA UP AND DOWN, ROLL PUMPS UP AND DOWN, NO BALL ON SEAT. 20:45 - 22:35 1.83 CLEAN P CLEAN POOH @ 91 FPM, CIRC 1.59 BPM, 1300 PSI PJSM FOR UNSTABBING INJECTOR AND LD 2 JTS OF CSH WHILE POOH Printed: 9/29/2009 11:37:53 AM • • BP EXPLORATION Page 11 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/18/2009 22:35 - 23:00 0.42 CLEAN P CLEAN TAG UP, FLOW CHECK, UNSTAB INJECTOR, CUT /BOOT ELINE AND MU NOZZLE TO CTC, SET INJECTOR OVER BUNGHOLE AND CIRC AT 3.0 BPM WHILE TRIPPING PIPE 23:00 - 00:00 1.00 CLEAN P CLEAN LD 2 JTS OF PH6, DBPV, AND DISCO, DROP 1/2" MARKED STEEL BALL, LET BALL FALL WHILE PUMPING 5 BBLS WITH TEST PUMP, NO SHEAR. 9/19/2009 00:00 - 03:00 3.00 CLEAN P CLEAN TOOH WITH 2560' OF 1 -1/4" CSH, LD MILL & MTR 03:00 - 03:10 0.17 EVAL P LOWER1 PJSM FOR LOADING SLB MCNL TOOLS UP BEAVER SLIDE AND MU SERLT GEN 2 TEST SUB TO INJECTOR 03:10 - 03:20 0.17 EVAL P LOWER1 LOAD MCNL TO FLOOR 03:20 - 03:50 0.50 EVAL P LOWER1 FIX 4 -POINT SLING, PU INJECTOR OFF LEGS, MU SELRT SUB, STAND INJECTOR BACK ON LEGS OVER BUNG HOLE 03:50 - 04:35 0.75 CEMT P RUNPRD MU WELL CAP AND PT LINER LAP, START = 2043 PSI, 15 MIN = 1963 PSI, 30 MIN = 1842 PSI. HAVE PJSM FOR RUNNING MCNL TOOLS AND TIH 1 -1/4" CSH DURING PT. 04:35 - 08:10 3.58 EVAL P LOWER1 MU SLB MCNL LOGGING CARRIER AND 1 -1/4" CSH _ WORKSTRING 08:10 - 08:20 0.17 EVAL P LOWER1 PJSM TO MU ENCODER CABLE FOR LOGGERS 08:20 - 08:30 0.17 EVAL P LOWER1 MU ENCODER CABLE FOR LOGGERS 08:30 - 09:50 1.33 EVAL N DFAL LOWER1 RIH WITH MCNL LOGGING TOOLS to 10,200' 09:50 - 11:35 1.75 EVAL N DFAL LOWER1 LOG MCNL TO PBTD LOG DOWN @ 30FPN1 TAG PBTD @ 12,984' (UNCORRECTED) 11:35 - 12:00 0.42 EVAL N DFAL LOWER1 CIRCULATE 34BBL PERF PILL TO BOTTOM 12:00 - 12:45 0.75 EVAL N DFAL LOWER1 LOG MCNL UP @ 60FPM TO 10,190' 12:45 - 14:00 1.25 EVAL N DFAL LOWER1 PAINT EOP FLAG @ 10,190' MARKING EOP @ 7,436' POOH 14:00 - 14:15 0.25 EVAL N DFAL LOWER1 PJSM FOR LU OF MCNL BHA 14:15 - 16:50 2.58 EVAL N DFAL LOWER1 STAND BACK CSH IN DERRICK & LD MCNL BHA 16:40 - 16:50 0.17 EVAL N DFAL LOWER1 PJSM FOR REMOVING SOURCE FROM MCNL TOOL 16:50 - 17:05 0.25 EVAL N DFAL LOWER1 BRING LOGGING TOOLS ABOVE FLOOR, WHILE OPENING CARRIER LOGGING TOOL SEPARATED LEAVING CNL TOOL WITH SOURCE IN LOWER CARRIER SECTION. STOPPED JOB TO DISCUSS REMOVAL OPTIONS 17:05 - 17:20 0.25 EVAL N SFAL LOWER1 DISCUSSED OPTIONS OF REMOVING SOURCE FROM MCNL TOOLS. REMOVING TOOL FROM HOLE & LAYING ONTO V -DOOR WAS FOUND TO BE THE SAFEST WAY TO HANDLE CARRIER 17:20 - 18:20 1.00 EVAL N SFAL LOWER1 LAID MCNL CARRIER ON V -DOOR & TRIED TO REMOVE TOOL FROM CARRIER, UNABLE TO REMOVE LOGGING TOOL FROM CARRIER ENOUGH TO REMOVE SOURCE, MU TOOL & PLACE IT BACK INTO THE HOLE FOR SAFETY WHILE DECIDING ON NEXT PLAN OF ACTION 18:20 - 19:33 1.22 EVAL N SFAL LOWER1 DISCUSSED METHODS OF RETRIEVING TOOL FROM CARRIER WHILE OFFLOADING DATA FROM MEMORY SONDE, DECIDE TO LOAD CNL TOOL & CARRIER TO CATWALK, CUT CARRIER, SLIDE CARRIER OFF OF CNL. HOLD PJSM AND DISCUSS SOURCE HAZARDS AND CUTTING HAZARDS. 19:33 - 20:06 0.55 EVAL N SFAL LOWER1 BRING TOOL ABOVE FLOOR, LAY ON CATWALK, CUT OFF Printed: 9/29/2009 11:37:53 AM • • BP EXPLORATION Page 12 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/19/2009 19:33 - 20:06 0.55 EVAL N SFAL LOWER1 CARRIER & REMOVE, REMOVE SOURCE FROM CNL. 20:06 - 20:15 0.15 EVAL P LOWER1 OFFLOAD SLB LOGGING TOOLS 20:15 - 21:05 0.83 CEMT P RUNPRD RU NIGHT CAP, PT LINER LAP TO 2000 PSI TIME PRESSURE 0 MIN 2058 5 2052 10 2050 15 2047 20 2045 25 2042 30 MIN 2041 35 2039 40 2037 TOTAL LOSS = 17 PSI, FIRST 15 MIN = 11 PSI, SECOND 15 MIN = 6 PSI, TEST PASS 21:05 - 21:45 0.67 PERFOB P LOWER1 RIG DOWN FROM LINER LAP TEST AND PREP FLOOR TO RUN GUNS WHILE PROCESSING MCNL LOGS. CORRECTED PBTD = 12,962'. 21:45 - 22:10 0.42 PERFOB P LOWER1 WHILE WAITNG ON GEO APPROVAL HAVE PJSM COVERING LOADING TCP TOOLS TO FLOOR AND RUNNING GUNS. TOWN APPROVES PERFS. 22:10 - 22:50 0.67 PERFOB P LOWER1 LOAD SLB TCP RUNNING EQUIPMENT TO FLOOR AND PREP TO RUN GUNS. RIH WITH FIRST 5 GUNS. 22:50 - 22:55 0.08 PERFOB P LOWER1 PLANNED PAUSE POINT TO REEVALUATE FOR ANY HAZARDS OR IF IMPROVEMENTS CAN BE MADE TO TECHNIQUE 22:55 - 00:00 1.08 PERFOB P LOWER1 CONTINUE RUNNING SWS TCP GUNS IN HOI 9/20/2009 00:00 - 00:10 0.17 PERFOB P LOWER1 RUN REMAINDER OF SWS PERF GUNS 00:10 - 00:30 0.33 PERFOB P LOW ER1 PJSM ON TRIPPING IN CSH AND PICKING UP PH6 00:30 - 02:25 1.92 PERFOB P LOWER1 MU EFIRE HEAD AND TIH WITH 28 STDS OF 1 -1/4" CSH & 2 JTS OF PH6 02:25 - 02:35 0.17 PERFOB P LOWER1 PJSM ON PICKING UP THE INJECTOR AND STABBING ON TO BHA 02:35 - 02:55 0.33 PERFOB P LOWER1 PU INJECTOR OFF LEGS AND MU TO BHA, STAB ON WELL 02:55 - 05:20 2.42 PERFOB P LOWER1 RIH WITH BHA #12 - CTC, XO, SWIVEL, XO, 2 JTS PH6, XO, DBPV, DISCO, XO, 58 JTS 1 -1/4" CSH, XO, DISCO, EFIRE HE 45 2" SWS POWER JET 6SPF PERF GUNS /BLANKS, BULLNOSE. TOTAL BHA LENGTH = 2788.86' 05:20 - 05:40 0.33 PERFOB P LOWER1 TAG PBTD AND CORRECT TO 12,962', PU TO BOTTOM SHOT AT 12,950'. PERFORM RATE CHECKS TO ESTABLISH CIRC RATES. PUMP RATE SEQUENCE CYCLE OF 1.75 BPM, 0.75 BPM, 0.5 BPM. SHOTS FIRED, GOOD INDICATION. 05:40 - 08:00 2.33 PERFOB P LOWER1 POOH HELD 15MIN PJSM FOR STANDING BACK CSH IN DERRICK 1,000' BEFORE SURFACE IN OPS CAB 08:00 - 09:45 1.75 PERFOB P LOWER1 STAND BACK 1 -1/4" CSH IN DERRICK 09:45 - 10:10 0.42 PERFOB P LOWER1 PJSM FOR LD OF SPENT PERF GUNS INTO PIPE SHED 10:10 - 12:00 1.83 PERFOB P LOWER1 LD SPENT PERF GUNS INTO PIPE SHED STOPPED AFTER 3 GUNS TO DISCUSS HOW JOB WAS GOING WITH NEW SLB HAND & CONTINUED TO LD GUNS Printed: 9/29/2009 11:37:53 AM • BP EXPLORATION Page 13 of 13 Operations Summary Report Legal Well Name: C -12 Common Well Name: C -12 Spud Date: 11/14/1979 Event Name: REENTER +COMPLETE Start: 9/5/2009 End: Contractor Name: Rig Release: Rig Name: Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations 9/20/2009 12:00 - 13:00 1.00 PERFOB P LOWER1 SHUT DOWN OPERATIONS FOR CREW CHANGE OUT PJSM WITH NEW CREW FQR LD OF SPENT PERF GUNS 13:00 - 14:00 1.00 PERFOB P LOWER1 LD SPENT PERF GUNS INTO PIPE SHED 14:00 - 14:10 0.17 PERFOB P LOWER1 PJSM F-OH HD OF SLB TCP TOOLS FROM RR FLOOR 14:10 - 14:30 0.33 PERFOB P LOWER1 RD SLB TCP TOOLS FROM RIG FLOOR 14:30 - 14:45 0.25 DHEQP P POST PJSM FOR RU & MU OF NOZZLE ASSY FOR FREEZE PROTECT 14:45 - 15:45 1.00 DHEQP P POST MU NOZZLE ASSY FOR FREEZE PROTECT 15:45 - 17:10 1.42 DHEQP P POST RIH TO TOL TAG 10,376' UNCORRECTED 17:10 - 19:45 2.58 DHEQP P POST DISPLACE WELL TO DIESEL FROM TOL TO SURFACE WHILE POOH POOH 40FPM @ 3BPM 19:45 - 20:00 0.25 DHEQP P POST TAG UP AND CHECK WELL FOR PRESSURE, 0 PSI. 20:00 - 20:45 0.75 RIGD P POST RU SLB N2 CREW AND WAIT ON MEOH 20:45 - 21:00 0.25 RIGD P POST PJSM THEN SPOT IN & RU MEOH PUP 21:00 - 21:15 0.25 RIGD P POST PJSM FOR BLOWING DOWN REEL WITH N2 21:15 - 22:25 1.17 RIGD P POST PT N2 LINES, BLOW DOWN REEL WITH N2 AT 1500 SCF FOR 15 MIN, LET COIL BLEED DOWN WHILE HAVING PJSM 22:25 - 22:45 0.33 RIGD P POST PJSM WITH VALVE CREW FOR SETTING BPV 22:45 - 23:35 0.83 WHSUR P POST UNSTAB INJECTOR, BREAK OFF NOZZLE, CHECK WH PRESSURE = 0 PSI, DRY ROD IN BPV, RD VALVE CREW 23:35 - 00:00 0.42 RIGD P POST CUT OFF CTC, ELINE BOOT MISSING, MEG WIRE = GOOD, INSTALL GRAPPLE 9/21/2009 00:00 - 01:50 1.83 RIGD P POST PULL COIL BACK AND SECURE TO REEL, STAND INJECTOR ON LEGS OVER BUNGHOLE. 01:50 - 02:15 0.42 RIGD P POST PJSM IN CELLAR FOR ND BOPE AND INSTALL OF INJ FLANGE 02:15 - 09:45 7.50 RIGD P POST ND LUBRICATOR, PU BOP STACK AND SWAB TO INSTALL INJ FLANGE SIMOPS: PJSM, LOWER REEL ONTO TRAILER 09:45 - 10:00 0.25 RIGD P POST PJSM FOR RU OF CELLAR FOR TREE CAP & INJ FLANGE PT 10:00 - 12:00 2.00 RIGD P POST RU CELLAR TO PT TREE CAP & INJ FLANGE 12:00 - 12:10 0.17 RIGD P POST PJSM FOR PT OF INJ FLANGE & TREE CAP 12:10 - 12:15 0.08 RIGD P POST PT INJ FLANGE & TREE CAP TO 4,000PSI FOR 5MIN 12:15 - 12:30 0.25 RIGD P POST RD TREE FROM PT RELEASE RIG @ 12:30 Printed: 9/29/2009 11:37:53 AM S S BAKER HUGHES INTEQ North America - ALASKA - BP Prudhoe Bay PB C Pad C- 12- Slot 12 C -12B Design: C -12B Survey Report - Geographic 17 September, 2009 � bp EMI MAICIIR FES • Survey Report - Geographic • bp LMTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Site: PB C Pad MD Reference: 14:12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: C -12B Survey Calculation Method: Minimum Curvature Design: C -12B Database: EDM .16 - Anc Prod - WF124P 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 C Pad, TR -11 -14 Site Position: Northing: 5,957,218.72ft Latitude: 70° 17' 22.367 N From: Map Easting: 662,550.03ft Longitude: 148° 41' 2.797 W Position Uncertainty: 0.00 ft Slot Radius: 0.000 in Grid Convergence: 1.24 ° Well C -12 API No 500292038700 Well Position +NI -S 0.00 ft Northing: 5,960,659.00 ft Latitude: 70° 17' 55.857 N +E / -W 0.00 ft Easting: 664,139.00 ft Longitude: 148° 40' 14.316 W Position Uncertainty 0.00 ft Wellhead Elevation: ft Ground Level: 0.00ft Wellbore C -12B API No 500292038702 Magnetics Model Name Sample Date Declination Dip Angle Field Strength ( °) ( (nT) BGGM2009 7/31/2009 22.58 80.93 57,669 Design C -12B Audit Notes: Version: 1.0 Phase: ACTUAL Tie On Depth: 11,300.00 Vertical Section: Depth From (TVD) +N /-S +E/-W Direction (ft) (ft) (ft) (°) 29.90 0.00 0.00 132.32 Survey Program Date: 9/17/2009 From To (ft) (ft) Survey (Wellbore) Tool Name Description 100.00 11,300.00 1 : Sperry-Sun BOSS gyro multi (C -12) BOSS -GYRO Sperry-Sun BOSS gyro multishot 11,377.00 13,004.00 MWD (C -12B) MWD MWD - Standard 9/17/2009 10:54:34AM Page 2 COMPASS 2003.16 Build 71 • HUGHES S urvey Report - Geographic • () INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: 14: 12 11/14/1979 00:00 @ 62.90ft (generic drillir Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: C -12B Survey Calculation Method: Minimum Curvature Design: C -128 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 11,300.00 39.20 157.61 8,540.89 - 3,970.96 4,878.69 5,956,795.82 669,102.91 70° 1 16.787 N 148° 37' 52.171 W TIP 11,377.00 38.44 157.76 8,600.88 - 4,015.62 4,897.01 5,956,751.58 669,122.21 70° 1 16.348 N 148° 37' 51.638 W KOP 11,397.01 35.55 157.00 8,616.85 - 4,026.73 4,901.64 5,956,740.57 669,127.08 70° 17' 16.239 N 148° 37' 51.503 W 11,422.56 31.66 156.00 8,638.13 - 4,039.70 4,907.27 5,956,727.72 669,132.99 70° 17' 16.111 N 148° 37' 51.339 W 11,444.57 27.31 155.00 8,657.29 - 4,049.56 4,911.76 5,956,717.97 669,137.69 70° 17' 16.014 N 148° 37' 51.209 W 11,469.06 21.18 153.65 8,679.60 - 4,058.62 4,916.10 5,956,709.00 669,142.23 70° 17' 15.925 N 148° 37' 51.082 W 11,498.50 14.42 165.38 8,707.63 - 4,066.95 4,919.39 5,956,700.75 669,145.70 70° 17' 15.843 N 148° 37' 50.987 W 11,531.05 12.43 197.68 8,739.33 - 4,074.22 4,919.35 5,956,693.48 669,145.82 70° 17' 15.772 N 148° 37' 50.988 W 11,561.96 14.08 232.54 8,769.46 - 4,079.68 4,915.35 5,956,687.93 669,141.94 70° 17' 15.718 N 148° 37' 51.105 W'i ' 11,597.86 19.64 258.83 8,803.86 - 4,083.52 4,905.94 5,956,683.89 669,132.62 70° 17' 15.680 N 148° 37' 51.379 W' 11,620.14 23.14 272.07 8,824.61 - 4,084.08 4,897.89 5,956,683.15 669,124.58 70° 17' 15.675 N 148° 37' 51.613 W' 11,644.83 25.50 280.65 8,847.11 - 4,082.93 4,887.81 5,956,684.09 669,114.48 70° 17' 15.686 N 148° 37' 51.907 W':, 11,669.59 31.26 282.37 8,868.89 - 4,080.56 4,876.29 5,956,686.20 669,102.91 70° 17' 15.709 N 148° 37' 52.243 W', 11,699.73 39.18 279.85 8,893.49 - 4,077.25 4,859.24 5,956,689.13 669,085.80 70° 17' 15.742 N 148° 37' 52.739 W 11,729.95 47.69 282.79 8,915.42 - 4,073.14 4,838.90 5,956,692.80 669,065.37 70° 17' 15.783 N 148° 37' 53.332 W' 11,758.90 54.85 286.82 8,933.53 - 4,067.33 4,817.10 5,956,698.13 669,043.45 70° 17' 15.840 N 148° 37' 53.967 W' 11,789.74 60.79 293.78 8,949.96 - 4,058.24 4,792.67 5,956,706.68 669,018.83 70° 17' 15.929 N 148° 37' 54.678 W 11,817.86 62.46 301.82 8,963.34 - 4,046.71 4,770.82 5,956,717.74 668,996.73 70° 17' 16.043 N 148° 37' 55.315 W 11,849.93 64.94 307.46 8,977.56 - 4,030.36 4,747.19 5,956,733.56 668,972.75 70° 17' 16.204 N 148° 37' 56.003 W 11,881.49 66.98 298.12 8,990.44 - 4,014.79 4,722.99 5,956,748.60 668,948.22 70° 17' 16.357 N 148° 37' 56.708 W 11,909.93 68.74 291.18 9,001.16 - 4,003.82 4,699.06 5,956,759.04 668,924.06 70° 17' 16.465 N 148° 37' 57.405 W 11,939.00 71.53 285.09 9,011.05 - 3,995.33 4,673.09 5,956,766.96 668,897.91 70° 17' 16.549 N 148° 37' 58.161 W 11,959.96 75.14 282.00 9,017.06 - 3,990.64 4,653.57 5,956,771.23 668,878.30 70° 17' 16.595 N 148° 37' 58.730 W', 11,989.58 81.57 288.29 9,023.04 - 3,983.05 4,625.61 5,956,778.21 668,850.17 70° 17' 16.670 N 148° 37' 59.545 W', 12,024.45 84.52 297.21 9,027.27 - 3,969.67 4,593.73 5,956,790.89 668,818.01 70° 17' 16.802 N 148° 38' 0.473 W' 12,052.82 84.68 301.21 9,029.94 - 3,955.89 4,569.08 5,956,804.12 668,793.07 70° 17' 16.937 N 148° 38' 1.191 W 12,080.98 88.10 302.36 9,031.72 - 3,941.09 4,545.19 5,956,818.40 668,768.87 70° 17' 17.083 N 148° 38' 1.887 W 12,111.16 90.61 306.25 9,032.06 - 3,924.08 4,520.27 5,956,834.85 668,743.58 70° 17' 17.251 N 148° 38' 2.613 W 12,141.05 91.97 309.67 9,031.38 - 3,905.70 4,496.71 5,956,852.71 668,719.63 70° 17' 17.431 N 148° 38' 3.299 WI 12,169.85 93.01 314.06 9,030.13 - 3,886.51 4,475.29 5,956,871.43 668,697.80 70° 17' 17.620 N 148° 38' 3.923 W 12,200.43 92.30 317.61 9,028.71 - 3,864.60 4,454.01 5,956,892.87 668,676.05 70° 17' 17.836 N 148° 38' 4.542 W 12,230.45 90.89 322.13 9,027.88 - 3,841.66 4,434.68 5,956,915.38 668,656.22 70° 17' 18.062 N 148° 38' 5.105 W 12,261.34 91.01 325.84 9,027.37 - 3,816.68 4,416.52 5,956,939.95 668,637.52 70° 17' 18.307 N 148° 38' 5.634 W 12,280.77 90.77 329.56 9,027.06 - 3,800.26 4,406.14 5,956,956.14 668,626.78 70° 17' 18.469 N 148° 38' 5.936 W 12,300.20 89.26 330.74 9,027.06 - 3,783.41 4,396.47 5,956,972.78 668,616.75 70° 17' 18.635 N 148° 38' 6.217 W 12,331.38 88.59 327.82 9,027.64 - 3,756.62 4,380.55 5,956,999.22 668,600.25 70° 17' 18.898 N 148° 38' 6.681 W, 12,361.51 88.92 324.41 9,028.30 - 3,731.61 4,363.76 5,957,023.85 668,582.91 70° 17' 19.144 N 148° 38' 7.170 W 12,391.05 89.88 321.56 9,028.61 - 3,708.03 4,345.97 5,957,047.03 668,564.62 70° 17' 19.376 N 148° 38' 7.687 W 12,420.45 90.61 318.84 9,028.48 - 3,685.45 4,327.16 5,957,069.20 668,545.32 70° 17' 19.599 N 148° 38' 8.235 W 12,451.42 90.86 317.00 9,028.09 - 3,662.46 4,306.40 5,957,091.72 668,524.07 70° 17' 19.825 N 148° 38' 8.840 W 12,480.90 91.26 314.24 9,027.54 - 3,641.40 4,285.79 5,957,112.33 668,503.00 70° 17' 20.032 N 148° 38' 9.440 W 12,511.32 91.14 311.31 9,026.90 - 3,620.75 4,263.47 5,957,132.49 668,480.24 70° 17' 20.235 N 148° 38' 10.090 W I 12,539.81 91.23 308.35 9,026.31 - 3,602.50 4,241.60 5,957,150.25 668,457.97 70° 17' 20.415 N 148° 38' 10.727 W' 12,569.81 90.43 305.89 9,025.88 - 3,584.40 4,217.68 5,957,167.82 668,433.67 70° 17' 20.593 N 148° 38' 11.423 W 12,600.35 89.63 302.68 9,025.86 - 3,567.20 4,192.45 5,957,184.47 668,408.07 70° 17' 20.762 N 148° 38' 12.158 W 12,631.15 89.29 299.89 9,026.15 - 3,551.21 4,166.13 5,957,199.88 668,381.41 70° 17' 20.920 N 148° 38' 12.925 W 12,656.76 89.29 297.28 9,026.47 - 3,538.96 4,143.65 5,957,211.63 668,358.67 70° 17' 21.040 N 148° 38' 13.580 W 12,696.14 89.23 293.67 9,026.98 - 3,522.02 4,108.11 5,957,227.79 668,322.77 70° 17' 21.207 N 148° 38' 14.615 W 12,731.16 88.80 290.25 9,027.58 - 3,508.93 4,075.64 5,957,240.17 668,290.02 70° 17' 21.336 N 148° 38' 15.561 W 12,767.35 90.28 287.05 9,027.87 - 3,497.36 4,041.35 5,957,250.98 668,255.49 70° 17' 21.450 N 148° 38' 16.560 W 12,798.35 92.27 285.44 9,027.18 - 3,488.69 4,011.60 5,957,259.00 668,225.56 70° 17' 21.535 N 148° 38' 17.427 W 12,821.77 90.43 283.22 9,026.63 - 3,482.90 3,988.92 5,957,264.30 668,202.76 70° 17' 21.593 N 148° 38' 18.087 W 12,847.96 89.23 280.92 9,026.71 - 3,477.42 3,963.31 5,957,269.21 668,177.04 70° 17' 21.647 N 148° 38' 18.833 W 9/17/2009 10:54:34AM Page 3 COMPASS 2003.16 Build 71 Faw/ II is • Survey Report - Geographic • 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: 14:12 11/14/1979 00:00 @ 62.90ft (generic drillir Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 © 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: C -12B Survey Calculation Method: Minimum Curvature Design: C -12B Database: EDM .16 - Anc Prod - WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +NI-S +E/ -W Northing Easting (ft) ( °) (1 (ft) (ft) (ft) (ft) (ft) Latitude Longitude 12,877.94 88.80 277.88 9,027.22 - 3,472.53 3,933.74 5,957,273.46 668,147.37 70° 17' 21.695 N 148° 38' 19.695 W 12,904.30 89.08 275.37 9,027.71 - 3,469.49 3,907.56 5,957,275.93 668,121.14 70° 17' 21.725 N 148° 38' 20.458 W' 12,936.11 89.63 272.25 9,028.07 - 3,467.37 3,875.83 5,957,277.35 668,089.37 70° 17' 21.746 N 148° 38' 21.382 W 12,956.83 90.06 269.95 9,028.13 - 3,466.97 3,855.12 5,957,277.29 668,068.65 70° 17' 21.750 N 148° 38' 21.986 W 13,004.00 90.06 269.95 9,028.08 - 3,467.02 3,807.95 5,957,276.22 668,021.49 70° 17' 21.750 N 148° 38' 23.360 W TD - 2 7 /8" 9/17/2009 10:54:34AM Page 4 COMPASS 2003.16 Build 71 TREE= 6" CIW • WELLHEAD = OCT SAFET NOTES: WELL > 70° @ 11939' AND 90° @ ACTUATOR = OTIS C-12B KB. ELEV = 62.94 12957'. C - 2 LNR DEPTHS ARE ELMDs. ' BF. ELEV = 32.24' KOP = 2300' DRLG DRAFT Max Angle = 93" @ 12170 I 2004' 1-17" OTIS SSSVN, ID = 5.962" F Datum MD = 11663' Datum TV D = 8800' SS = I 2564' H 9-5/8" DV PKR I 13-3/8" CSG, 72#, L-80, ID = 12.347" H 2681' ■ Minimum ID = 2.30" @ 10354' SELRT BUSHING 17" TBG, 26#, L-80, IJ4S, .0383 bpf, ID = 6.276" H 10278' I 10278' H TOP OF 7" PBR 1 L 0 10298' H9-5/8" X 4-1/2" GUIBERSON PKR, ID = 3.833" 1 3.7 BKR DEPLOYMENT SLV. D = 3 00" H 10344' 380 1 I --I 10345' H4-1/2" OTIS X NIP, ID = 3.813" I 1" I [Ted out SELRT bushing, ID = 2,30" H 10354* . 1 I 10376' H4-1/2" OTIS XN NIP, MILLED TO 3.80" ID I 7" BOT LNR HGR H 10402' I 13-1/2" LNR, 9.3#. L-80, STL, ID = 3.50" H 10395' I .... I 10395' 1-13-1 /2" X 3-316' X0, ID = 2,80" I III 14-1/2" TBG, 12.6#, L-80, .0152 bpf, ID = 3.958" H 10437' 1 1 MULESHOE ( WLEG ) 1 I 10433 H ELTAD TT LOG NOT AVAILABLE I 9-5/8" CSG, 47#, L-80-BTS, ID = 8.681" H 10957' PERFORATION SUMMARY REF LOG SLB MCNL ON 09/19/09 ANGLE AT TOP PERE: 83' @ 12010' L TSGR 11,173' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL Opn/Sqz DATE 2" 6 12010 - 12170 0 09/20/09 7" MILLOUT WINDOW (C-12B) 11381' - 11389' 2" 6 12270 - 12950 0 09/20/09 , WI L12257' H3-3/16" X 2-7/8" XO, ID = 2.377 a 4114, el 38 I Top of Baker 4.5" x 7" WS 11377' . , , - mall111111111 ' - - 11111111111111111•11111 4011. I RA PIP Tag in WS I 11385' , , 11,4Misn 41 r , ... , Nr" ' I 3 LNR, 6.2#, L-80, TCII, Dr 3.188" 1-1, 12257' I 11400' H CIBP I 12 7/8' LNR, 6,16#, L-80, STL, ID= 2.875' H 13 . ' I I 11650' I—IRA TAG I \\ O ''s ' 1••••••• 17" LNR, 29#, L-80 BTRS, .0371 bpf, ID = 6.184" H 12048' •• . 12-7/8" LNR, 6.16#, STL, .0058bpf, ID = 2.37" H 13155' I DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 12/20/79 ORIGINAL COMPLETION WELL: C-12B 07/20/98 WHITLOVi, CTD SIDETRACK (C-12A) PERMIT No: 209-085 09/21/09 NORDIC2 CTD SIDETRACK (C-12B) API No: 50-029-20387-02 09/30/09 SV DRLG HO CORRECTIONS SEC 19, T11N, R14E, 555' SNL & 1221' WEL BP Exploration (Alaska) 0 • l � . ; ° - EE .,t 'q ° t 1 ¢ 1 , SEAN PARNELL, GOVERNOR ALASKA. OIL AND GAS / 333 W. 7th AVENUE, SUITE 100 CONSERVATION COMI'IISSIONT C .¢ ANCHORAGE, ALASKA 99501 -3539 PHONE (907) 279 -1433 / FAX (907) 276 -7542 Mr. John McMullen Engineering Team Leader BP Exploration (Alaska) Inc. P.O. Box 196612 Anchorage, AK 99519 -6612 Re: Prudhoe Bay Field, Prudhoe Bay Pool, PBU C -12B BP Exploration (Alaska) Inc. Permit No: 209 -085 Surface Location: 555' FNL, 1221' FEL, SEC. 19, T11N, R14E, UM Bottomhole Location: 1258' FSL, 2735' FEL, SEC 20, T11N, R14E, UM Dear Mr. McMullen: 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. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659 -3607 (pager). Sincerely, Cathy . Forester //�� Commissioner DATED this( v day of August, 2009 cc: Department of Fish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/ o encl. STATE OF ALASKA . 0"" ALASKOIL AND GAS CONSERVATION COMMI•N ' .-- fl E I VE,6 -09 PERMIT TO DRILL 20 AAC 25.005 U ') 2009 1 a. Type of work 1 b. Current Well Class ❑ Exploratory ❑ Development Gas 1 c. Specify if well is proposed for: ❑ Drill ® Redrill ❑ Service ❑ Multiple Zone ❑ Coalbed Methane ❑iGs t:4yd imisslC i" ❑ Re -Entry ❑ Stratigraphic Test ® Development Oil ❑ Single Zone ❑ Shale Gas `'. . 2. Operator Name: 5. Bond: _i Blanket ❑ Single Well 11. Well Name and Number: BP Exploration (Alaska) Inc. Bond No. 6194193 PBU C - 12B 3. Address: 6. Proposed Depth: 12. Field / Pool(s): P.O. Box 196612, Anchorage, Alaska 99519 -6612 MD 13000' TVD 8966' ss Prudhoe Bay Field / Prudhoe Bay 4a. Location of Well (Governmental Section): 7. Property Designation: Oil Pool Surface: ADL 028305 555' FNL, 1221' FEL, SEC. 19, T11 N, R14E, UM Top of Productive Horizon: 8. Land Use Permit: 13. Approximate Spud Date: 303' FSL, 1491' FEL, SEC. 20, T11 N, R14E, UM September 5, 2009 Total Depth: 9. Acres in Property: 14. Distance to Nearest Property: 1258' FSL, 2735' FEL, SEC. 20, T11 N, R14E, UM 2560 30130' 4b. Location of Well (State Base Plane Coordinates): 10. KB Elevation 15. Distance to Nearest Well Within Pool: Surface: x- 664139 y- 5960659 Zone -ASP4 (Height above GL): 62.94 feet 580' 16. Deviated Wells: Kickoff Depth: 11400 feet 17. Maximum Anticipated Pressures in psig (see 20 AAC 25.035) Maximum Hole Angle: 90.5 degrees Downhole: 3207 Surface: 2327 18. Casino P roaram: Soecifications Top - Setting Depth - Bottom Quantity of Cement. c.f. or sacks Hole Casing Weight Grade Coupling Length MD TVD MD TVD (including stage data) 4 -1/4" 3 -1 x 3 -3/16° 8.81# / 6.2# L -80 STL / TCII 2630' 10370' 7849' 13000' 8966' ss 115 cu ft Class 'G' x 2 -7/8" / 4.7# 19. PRESENT WELL CONDITION SUMMARY (To be completed for Redrill and Re -entry Operations) Total Depth MD (ft): Total Depth TVD (ft): Plugs (measured): Effective Depth MD (ft): Effective Depth TVD (ft): Junk (measured): 13155 9027 None 13089 9027 None Casing Length Size Cement Volume MD TVD Conductor / Structural 110' 20" x 30" 12,9 cu vds Permafrost Concrete 110' 110' Surface 2681' 13 -3/8" 4343 cu ft Arcticset 2681' 2662' Intermediate Production 10957' 9 - 5/8" 1673 cu ft Class 'G', 130 cu ft Arcticset 10957' 8291' Liner 1242' 7" 600 cu ft Class 'G' 10402' - 11644' 7875' - 8813' Liner 2794' 2 -7/8" 93 cu ft Class 'G' 10361' - 13155' 7842' - 9027' Perforation Depth MD (ft): 12150' - 13000' Perforation Depth TVD (ft): 9024' - 9031' 20. Attachments ❑ Filing Fee, $100 ►=I BOP Sketch ® Drilling Program ❑ Time vs Depth Plot ❑ Shallow Hazard Analysis ❑ Property Plat ❑ Diverter Sketch ❑ Seabed Report ® Drilling Fluid Program ® 20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the fore. sing is true and ect. Contact Greg Sarber, 564 - 4330 Printed Name Jor c;.(ly Title Engineering Team Leader 1 other reauirements 50- 029 - 20387 -02-00 Date: / Prepared By Na /Number: Signature / C / Phone 564 -4711 Date ;��� 0 S o ndra S tewman , 564 - 47 50 ,./ Commission Use On{ Permit A Permit To API Number: p rov I See cover letter for Number: .0709005 /� (' I of Approval: �1 Conditions pp If box is checked, well may not be used to explore for, test, or produce coalbed methane, gas hydrates, or gas contained shales: lit 3500 pSc. 60 P 'led— Samples Req'd: 0 11d No Mud Log Req'd: ❑ o /� .-� L Other: H Measures: ( Yes ❑ No Directional Survey Req'd: L►J Yes ❑ No 254c) pdc. / 4Knw14v 1 �S 1 Q y� � /*---- PROVED BY THE COMMISSION Date P � ( - U . ,COMM ISSIONER Form 10-401 Revised 12/2005 ! Submit In Duplicate ORIGINAL - - :4 ? } 1� s -7 a? • • To: Tom Maunder Petroleum Engineer bP Alaska Oil & Gas Conservation Commission From: Greg Sarber CTD Engineer Date: August 4, 2009 Re: C -12B Application for Permit to Drill Request CTD Drill and Complete C -12B program: Spud September 5, 2009 Permit to Drill approval is requested to drill a new sidetrack lateral from the parent well, C -12A. C -12A is not a competitive well. It exhibits minimal recharge, and has low remaining value. It has damaged liner with no repair options and can't flow as currently twinned. The pre CTD rig plan is to abandon the existing perforations with a cast iron bridge plug and primary cement job from the new sidetrack liner. The CTD side track will target 2A reserves to the southeast of C pad. Short Timing — Due to the lack of availability of equipment needed for two currently permitted wells, this well has moved up the drilling schedule considerably. The expected spud date for the C -12B sidetrack is now September 5, 2009. Due to the limited time until the rig must commit to moving to this well, quick permit to drill approval is requested from the AOGCC. WELL HISTORY /CURRENT STATUS: C -12A is a 1998 horizontal CTD sidetrack completed in Z2A with 350' of perforations. C -12A began to cycle within six months due to high GOR driven by high gas rates. 60' of Z2A perforations were added closer to the heel in early January 2000 without notable impact. A CIBP was set at 12500' MD to shut off the initial perf sets in April 2000 but didn't have an impact on the GOR trend; drops in both oil and gas rates were observed. The well continued to cycle over the next two years until June 2002 when the CIBP was milled and pushed to bottom. There was a short -lived oil buzz, but the gas rate quickly climbed up to 40 MMCFD, and the well began to cycle again. C -12A is currently twinned with C -11 A but cannot flow commingled due to the flowline gas rate constraint of 58 MMCFD. C -12A has seen minimal on -time since C -11A was drilled in 2003. On April 9 -11, 2009 service coil rigged up to re -set the CIBP for a gas shut -off, but they tagged high at 12,177' CTM above the top set of perfs. A 1.69" motor and 2.20" mill was used to attempt to mill through the obstruction in the 2 -7/8" liner but was unsuccessful, most likely due to collapsed liner. Without access to the lateral, C -12A remains shut -in for high GOR. An SCMT log run on 6/6/09 indicated the top of cement behind the 2 -7/8" liner is at 11420' MD, which is below the TSGR allowing for a cut - and -pull of the liner for a big coil sidetrack. During CTD screening in June 2009, the well passed a MIT -IA to 3000 psi and a MIT -OA to 2000 psi. The PPPOT -T passed but the PPPOT -IC failed despite all LDS functioning. A caliper log run 5/25/09 indicated the tubing is in good -to -fair condition and the 2- 7/8" liner is in good condition. II • • Pre -Rig Operations: (Scheduled to begin on August 15, 2009) 1. 0 MIT -OA - 2000 psi Passed 06/18/2009 DONE 2. 0 MIT -IA - 3000 psi Passed 06/11//2009 DONE 3. 0 PPPOT -IC, AC -LDS 4. E Set 2 -7/8" CIBP at 11,420'MD. Pressure test tubing to 3000 psi. 5. E Jet cut 2 -7/8" liner at 11,410' MD 6. 0 PT tree (MV,SV,WV) 7. 0 Bleed gas lift and production flowlines down to zero and blind flange 8. 0 Remove S- Riser, Remove wellhouse, level pad Rig Sidetrack Operations: (Scheduled to begin on September 5, 2009) 1. NU 7- 1/16" CT Drilling BOPE and test to 250 psi low and 3500 psi high 2. Pull BPV. 3. Pull 2 -7/8" liner that was jet cut at 11,410'MD. 4. Drift for 4 -1/2" X 7" Baker whipstock. 5. Run memory caliper log. 6. Set 4 -1/2" X 7" whipstock 11,380' ELM 7. Mill 3.80" window at 11,380'. 8. Drill build /turn section with 4.25" bicenter bit, and land well. 9. Drill lateral section to 13,000' MD w/ resistivity log. 10. Run 3 -1/2 "x 3- 3/16 "x 2 -7/8" solid liner w /cementralizers to TD. Place liner top at 10,370' MD. 11. Cement liner from TD to 11,280' MD with 20.5 bbls of 15.8ppb cement. 12. Clean out liner /Run MCNUGR/CCL log. 13. Test liner lap to 2000 psi. 14. Perforate well, expected 600' of perforations in Zone 2A. 15. Set liner top packer (if fails liner lap test) 16. Freeze protect well to 2500' with methanol. 17. Set BPV. ND 7- 1/16" stack. FP tree and PT tree cap to 3500 psi. 18. RDMO Nordic 1. Post -Rig Work: 1. Re- install wellhouse and FL's. 2. Pull BPV. 3. RU test separator, flow test well. Il • Mud Program: • Well kill: 8.6 ppg brine • Milling /drilling: 8.6 ppg Geo -Vis or biozan for milling, Geo -Vis for drilling. Disposal: • All drilling and completion fluids and all other Class II wastes will go to Grind & Inject. • All Class I wastes will go to Pad 3 for disposal. Hole size: 4 -1/4" Casing Program: • 3 -1/2 ", 8.81#, L -80, STL connection solid liner - 10,370'MD — 10,410' MD w/ possible liner top packer. • 3- 3/16 ", 6.2 #, L -80, STL TC -II connection solid liner — 10,410' MD — 12,250' MD. • 2 -7/8 ", 4.7# , L -80, STL connection Solid liner — 12,250' MD — 13,000' MD. • A minimum of 20.5 bbls 15.8 ppg cement will be used for liner cementing. (TOC 11,280'MD) Well Control: • BOP diagram is attached. • Pipe rams, blind rams and the CT pack off will be pressure tested to 250 psi and to 3500 psi. • The annular preventer will be tested to 250 psi and 2500 psi. Directional • See attached directional plan. Maximum planned hole angle is 90.5 deg @ 12,286'. • Magnetic and inclination surveys will be taken every 30 ft. No gyro will be run. • Distance to nearest property line — 30,310' N • Distance to nearest well within pool — 580' at perforations (C -02) Anticollision Summary • C -10A 447' ctr -ctr, Status: Cycle Producer 30 days on /30 days off. Currently Shut In. • C -31 B 415' ctr -ctr, Status: Shut In high GOR producer. • C -32C 333' ctr -ctr, Status: cycle Producer 30 days on /60 days off. Currently producing 500 bopd, 30 bwpd, 30 mmcfd Logging • MWD directional, Gamma Ray, and Resistivity will be run over all of the open hole section. • A cased hole GR /CCL/CNL log will be run. Hazards • There is no H2S information available for well C -12 due to Its co- mingled production status with well C -11. • The maximum recorded H2S level on C Pad is 25 ppm on C -39A (04 -16- 2007). C Pad is not an H2S pad. • Lost circulation risk is moderate. No fault crossings are expected and the wellpath has been designed to avoid known faults. Reservoir Pressure • Res. press. was last measured at 3,207 psi @ 8,800' TVD on 10/24/2005 (7.01 ppg eq.) Maximum surface pressure with gas (0.10 psi /ft) to surface is 2,327 psi. Greg Sarber CTD Engineer • • TREE = 6" OW WELLHEAD= OCT C-1 2A NOTES: WELL � 12300'. 70 @ 11846• AND GOES >CTUATOR = OTIS CB. ELEN = 62.94' 3F. E.EV = 32.24' COP = 2300' Mx Angle = )4 @ 13013' ® I 2004' Hr OTIS SSSV N, D = 5.962" 1 )atumNO= 11711' Tatum ND = 8800' SS � 2564' 9-5/8" DV PKR 1 113 -3/8" CSG, 72#, L -80, D =12.347" H 2681' ] = Minimum ID = 2.37" @ 10368' TOP OF 2 -7/8" LNR 17" TBG, 26#, L -80, U4S, .0383 bpf, 02. 6.276" H 10278' I I 10276' I TOP OF 7" FBR 1 Ei. 10298' H9 -5/8" X 4-1/2" GUBERSON PKR, D = 3.833" I 1 1 1 10346' H4 -1/2" OTIS X NP, D= 3.813" I 13.75" BKR DEPLOYMENT SLV , ID = 3.00" H 10361' I u I LNR, D TOP OF 2 -7/8" LN = 2.372" H 10368' ' I 10376' H4 -1/2" OTIS XN NP, MLLED TO 3.80" D 1 17' BOT LNR HGR H 10402' 1 14-1 /2" TBG, 12.6#, L- 80..0152 bpf, D = 3.958" H 10437' j / \ I 10■36' H4 - 1/2" MLtiESHOE( WLEG) 1 10433' HELMDTT LOG NOT AVALABLE I 19 -5/8" CSG, 47 #, L- 80 -BTS, ID = 8.681" H 10987' 1 • ■ 7" NLLOUT WINCOW 11644' - 11650' PERFORATION SUMMARY ARY REF LOG: SPERRY GR ON 07/16/98 ANGLE AT TOP FERF: 85 @ 12150' Note: Refer to Production DB for historical pert data 1 11641' Hr VVHIPSTOCK 1 SIZE SPF INTERVAL Opn/Sqz DATE 2" 4 12150 -12210 0 01/25/00 j 11650' RA TAG 1 -2/3" 4 12550 -12800 C 04/25/00 1 -2/3" 4 12900 -13000 C 04/25/00 *t !j , ij j \ \ 130h1* BTD ctmd — MILLED 2 -7/8" CP, PUSHTO P - 06/10/02 7" LR 29#, L -80 BTRS, .0371 bpf, D = 6.184" 12048 �, 1308 PBTD 1 12 -7/8" LNR 6.16#, STL, .0058bpf, D = 2.37" H 13155' I DATE REV BY COMMENTS DATE REV BY COMMENTS FRUDHOE BAY UNR 12/20/79 ORIGINAL COMPLETION WELL: C-12A 07/20/90 NHITLOYI CT°SIDETRACK PERMIT No: 1981100 07 /28/01 CH KAK CORRECTIONS API No: 50- 029 - 20387 -01 06/15/02 KSB/TP MILL OOP SEC 19, T11 N, R14E, 555' SNL & 1221' WEL 09/15/03 MO TO DA1UM MO COMETION BP Btploration (Alaska) • • TREE= 6" Ct/V NELLHEAD = OCT C -1 2 B SAFETY NOTES: WELL > 70 @ 11845' AND GOES %CTUATOR = OTIS HORIZONTAL @ 12300'. (B. ELEV = 62 94' PROPOSED CTD SIDETRACK 3F ELEV = 32 24' - <OP = 2300' Wax Angle = /4 @ 13013' ® 2004' 7" OTIS SSSVN, Tatum MD= 11711' 1 -1 - -- )etumTVO= 8800' SS 2564' —19 -5/8" DV PKR 113 -3/8" CSG, 72 #, L -80, ID = 12.347" I--I 2681' Minimum ID = 2.3" @ 10375' TOP OF CT LNR 17" TBG, 26#, L -80, U4S, .0383 bpf, ID = 6.276" H 10278' I j 10278' HTOP OF 7" PBR I 10298' H9-5/8" X 4 GINBERSON PKR, D= 3.833" I I Baker Liner top packer D = 2.375" H 10360' I_ I I I 10345' H4 - 1/2" OTIS X NP, D= 3.813" I 13 7" BKR DEPLOYMENT SLV —1 10370' I 38(:) ^ 10375' H bushing ID = 2.30" IF I I 10376' —14 -1/2" OTIS XN NP, MILLED TO 3.80" D I 7" BOT LNR HGR H 10402' I4 - 1/2" TBG, 12 6#, L - 80, .0152 bpf, ID = 3.958" 1 10437' I / \ I 10438' H4 - 1/2" MULESHOE( WLEG) I I 10433' HELM) TT LOG NOT AVAILABLE I 9 -5/8" CSG, 47 #, L- 80 -BTS, ID = 8.681" H 10957' PERFORATION SUMMARY REF LOG: SPERRY GR ON 07/16/98 ANGLE AT TOP PERF: 85 @ 12150' Note: Refer to Production DB for historical pert data • SIZE SPF INTERVAL Opn /Sqz DATE 2" 4 12150 - 12210 0 01/25/00 1 -2/3" 4 12550 -12800 C 04/25/00 TSGR 11,173' 1 -2/3" 4 12900 - 13000 C 04/25/00 ( — TOO 100' above window @ 11,280' 3 -3/16" x 2 -7/8" XO, 10' mkr joint 38 'x @ 12,250' I 11380. I 7„ WHIPSTOCK £ <, CUT 2 -7/8" 11405' I3- 3/16" x 2 -7/8" cemented & Ferfd H 1300L I CIBP @ 11,420' -- TOC 11420' SCMT 6/6/09 7" MILLOUT WINDOW 11644' - 11650' 11650' H RA TAG I ` I xxx H PBTD ■ 17" LNR, 291, L -80 BTRS, -0371 bpf, ID = 6.184" 12048' � .6 A WA: ; $. _ L -na LINK, a ID*, .UU O.I, IU -L.3/ 1.311** DATE REV BY 00'' a` "° ' v = • •e'' a' S PRUDHOE BAY UNR 12/20/79 ORIGINAL COMPLETION WELL C 07/20198 WHITLOW CTD SIDETRACK FERMI' No. 07/28/01 CWKAK CORRECTIONS APINo. 50 029 20387 - 06/15/02 KSB/TP MILL CIBP SEC 19, T11 N, R14E, 555' SNL & 1221' WEL 09/15/03 CMO/TLP DATUM MD CORRECTION 07/09/09 MSE PROPOSED CTD SIDETRACK BP Exploration (Alaska) • • Rig Floor to Top of Lubricator I Rig Floor to Top of Bag Wel C -12B I I 2.25 I I ; 9.23 'I N I 9.23 ` 11OYUI Lubricator ID = 6.375" with 6" Otis Unions Hydril Annular 1 7 1.16" Annular x 5000 psi 5.00 l „II__ 4 7 1/16" 5000 psi, RX -4 Blind Shears 12.65 14-- TOT 111 13.56 I 2" Combi's • 7 1 :16" 5000 psi RX -46 11 2 1.16" 5000 psi , R-24 ll , V , f-----' — L1ud Cross — [Mal Mud Cross /� ,I e j l] HCR 1 14.89 I HCR — • 1 i Choke Line 1 Kill Line 1 1 1 1 J 16.10 f— 2 318" x 3112" 2 1.16" 5000 psi , RX -24 ♦ Variable Ram 16.66 1 f r 2~ OT TOT 7 1;16" 5000 psi (RX -46) 7 1.16" X 3 1 :8" Flanged Adapter • • 20.04 I ,• _ Swab Valve I Tree Size Ki 4 1:16" I I Flow Tee I 1 Flow Line 1 22.88 1 4 0 SSV 1 r • 24.86 ` -y Master Valve I I. I I EOM -CE 26.68 I Lock Down Screws I 31.00 ` ■ _ Ground Level I rail r BAKER MOMS S INTEQ North America - ALASKA - BP Prudhoe Bay 0 PB C Pad C -12 - Slot 12 Plan 3, C -12B Plan: Plan #3 Baker Hughes INTEQ Planning Report 0 03 August, 2009 � bp ss Baker Hughes INTEQ Planning Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P 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 C Pad, TR -11 -14 Site Position: Northing: 5,957,218.72 ft Latitude: 70° 17 22.367 N From: Map Easting: 662,550.03 ft Longitude: 148° 41' 2.797 W Position Uncertainty: 0.00 ft Slot Radius: 0.000 in Grid Convergence: 1.24 ° Well C -12 - Slot 12, C -12 Well Position +N / -S 0.00 ft Northing: 5,960,659.00 ft Latitude: 70° 17' 55.857 N +E/-W 0.00 ft Easting: 664,139.00 ft Longitude: 148° 40' 14.316 W Position Uncertainty 0.00 ft Wellhead Elevation: ft Ground Level: 0.00ft Welibore Plan 3, C -12B Magnetics Model Name Sample Date Declination Dip Angle Field Strength ( °) ( °) (nT) BGGM2009 7/31/2009 22.58 80.93 57,669 Design Plan #3 Audit Notes: Version: Phase: PLAN Tie On Depth: 11,300.00 Vertical Section: Depth From (TVD) +N/-S +E/ -W Direction (ft) (ft) (ft) ( -33.00 0.00 0.00 310.00 8/3/2009 4:13:21 PM Page 2 COMPASS 2003.16 Build 71 wag s s Baker Hughes INTEQ Planning Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Site: PB C Pad MD Reference: 14:12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature I Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P Survey Tool Program Date 7/31/2009 From To (ft) (ft) Survey (Wel!bore) Tool Name Description 100.00 11,300.00 1 : Sperry-Sun BOSS gyro multi (C -12) BOSS -GYRO Sperry-Sun BOSS gyro multishot 11,300.00 13,000.00 Plan #3 (Plan 3, C -12B) MWD MWD - Standard • Planned Survey MD Inc Azi TVDSS N/S EM Northing Easting DLeg V. Sec TFace (ft) (°) ( °) (ft) (ft) (ft) (ft) (ft) ( °1100 (ft) (°) 11,300.00 39.20 157.61 8,477.99 - 3,970.96 4,878.69 5,956,795.82 669,102.91 0.00 - 6,289.77 0.00 TIP 11,380.00 38.42 157.77 8,540.32 - 4,017.34 4,897.72 5,956,749.86 669,122.95 0.98 - 6,334.17 172.74 KOP 11,400.00 36.62 157.77 8,556.19 - 4,028.62 4,902.33 5,956,738.69 669,127.81 9.00 - 6,344.95 180.00 End of 9 Deg /100' DLS 11,482.00 16.12 157.77 8,629.26 - 4,062.15 4,916.03 5,956,705.47 669,142.24 25.00 - 6,377.00 - 180.00 4 11,500.00 12.42 168.28 8,646.71 - 4,066.37 4,917.37 5,956,701.29 669,143.67 25.00 - 6,380.74 150.00 11,512.00 10.31 179.15 8,658.47 - 4,068.70 4,917.65 5,956,698.96 669,144.00 25.00 - 6,382.45 139.81 5 11,542.00 9.21 224.10 8,688.08 - 4,073.12 4,916.02 5,956,694.51 669,142.47 25.00 - 6,384.04 120.00 6 11,572.00 11.86 263.54 8,717.61 - 4,075.19 4,911.28 5,956,692.33 669,137.77 25.00 - 6,381.74 90.00 7 11,600.00 16.49 285.37 8,744.77 - 4,074.46 4,904.58 5,956,692.92 669,131.06 25.00 - 6,376.14 60.00 11,602.00 16.89 286.45 8,746.68 - 4,074.30 4,904.03 5,956,693.06 669,130.51 25.00 - 6,375.62 38.81 8 11,632.00 23.67 295.80 8,774.81 - 4,070.44 4,894.42 5,956,696.71 669,120.81 25.00 - 6,365.77 30.00 9 11,700.00 40.67 295.80 8,832.16 - 4,054.74 4,861.94 5,956,711.70 669,088.00 25.00 - 6,330.80 0.00 11,792.00 63.67 295.80 8,888.21 - 4,023.33 4,796.95 5,956,741.68 669,022.35 25.00 - 6,260.83 0.00 10 8/3/2009 4:13:21PM Page 3 COMPASS 2003.16 Build 71 , niStIEs Baker Hughes INTEQ Planning Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Coordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Site: PB C Pad MD Reference: 14:12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P Planned Survey MD Inc Azi TVDSS N/S EMI Northing Easting DLeg V. Sec TFace (ft) ( ( (ft) (ft) (ft) (ft) (ft) ( (ft) ( 11,800.00 63.69 293.57 8,891.76 - 4,020.33 4,790.44 5,956,744.53 669,015.77 25.00 - 6,253.91 -90.00 11,869.00 65.25 274.51 8,921.72 - 4,005.39 4,730.41 5,956,758.16 668,955.43 25.00 - 6,198.32 -89.01 • 11 11,900.00 65.49 283.04 8,934.66 - 4,001.10 4,702.59 5,956,761.85 668,927.53 25.00 - 6,174.25 90.00 11,943.00 66.60 294.74 8,952.17 - 3,988.39 4,665.51 5,956,773.74 668,890.18 25.00 - 6,137.67 86.44 12 12,000.00 80.85 294.74 8,968.10 - 3,965.55 4,615.94 5,956,795.49 668,840.13 25.00 - 6,085.02 0.00 12,036.59 90.00 294.74 8,971.02 - 3,950.30 4,582.85 5,956,810.01 668,806.72 25.00 - 6,049.87 0.00 End of 25 Deg /100' DLS 12,100.00 90.13 302.35 8,970.94 - 3,920.02 4,527.19 5,956,839.06 668,750.41 12.00 - 5,987.77 89.00 12,200.00 90.34 314.35 8,970.53 - 3,858.10 4,448.90 5,956,899.26 668,670.80 12.00 - 5,887.99 89.01 12,286.59 90.50 324.74 8,969.90 - 3,792.31 4,392.79 5,956,963.81 668,613.27 12.00 - 5,802.72 89.06 14 12,300.00 90.50 323.13 8,969.78 - 3,781.47 4,384.90 5,956,974.47 668,605.14 12.00 - 5,789.71 -90.00 12,400.00 90.49 311.13 8,968.92 - 3,708.32 4,316.99 5,957,046.11 668,535.65 12.00 - 5,690.66 -90.01 12,500.00 90.45 299.13 8,968.10 - 3,650.89 4,235.35 5,957,101.74 668,452.78 12.00 - 5,591.21 -90.12 12,536.59 90.43 294.73 8,967.82 - 3,634.32 4,202.74 5,957,117.59 668,419.82 12.00 - 5,555.58 - 90.220 15 12,600.00 90.30 302.34 8,967.41 - 3,604.05 4,147.07 5,957,146.64 668,363.51 12.00 - 5,493.48 91.00 12,636.59 90.22 306.73 8,967.25 - 3,583.31 4,116.94 5,957,166.71 668,332.94 12.00 - 5,457.07 91.05 16 12,700.00 90.21 299.12 8,967.01 - 3,548.87 4,063.75 5,957,199.98 668,279.01 12.00 - 5,394.18 -90.00 12,800.00 90.20 287.12 8,966.65 - 3,509.67 3,971.96 5,957,237.17 668,186.39 12.00 - 5,298.67 - 90.03 12,886.59 90.19 276.73 8,966.35 - 3,491.80 3,887.36 5,957,253.18 668,101.42 12.00 - 5,222.37 -90.07 17 12,900.00 90.19 278.34 8,966.31 - 3,490.04 3,874.06 5,957,254.65 668,088.09 12.00 - 5,211.05 90.00 13,000.00 90.18 290.34 8,965.99 - 3,465.31 3,777.36 5,957,277.26 667,990.88 12.00 - 5,121.08 90.01 TD at 13000.00 8/3/2009 4:13:21 PM Page 4 COMPASS 2003.16 Build 71 Fri All e= Baker Hughes INTEQ Planning Report bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Welibore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P • • 8/3/2009 4:13:21PM Page 5 COMPASS 2003.16 Build 71 Mau Baker Hughes INTEQ Planning Report bp LNTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Welibore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P Targets Target Name - hit/miss target Dip Angle Dip Dir. ND +N /-S +E/ -W Northing Easting - Shape ( °) ( °) (ft) (ft) (ft) (ft) (ft) Latitude Longitude C -12B Target 2 0.00 0.00 8,965.00 - 3,714.96 4,341.20 5,957,040.00 668,560.00 70° 17' 19.308 N 148° 38' 7.827 W • - plan misses target center by 12.18ft at 12378.65ft MD (8969.10 TVD, - 3722.71 N, 4332.75 E) - Point C -12B Polygon 0.00 0.00 0.00 - 3,871.49 4,637.87 5,956,890.00 668,860.00 70° 17' 17.767 N 148° 37' 59.185 W - plan misses target center by 8481.99ft at 11300.00ft MD (8477.99 TVD, - 3970.96 N, 4878.69 E) - Polygon Point 1 0.00 - 3,871.49 4,637.87 5,956,890.00 668,860.00 Point 2 0.00 - 3,538.68 4,285.03 5,957,215.00 668,500.00 Point 3 0.00 - 3,368.22 3,808.61 5,957,375.00 668,020.00 Point 4 0.00 - 3,561.77 3,739.36 5,957,180.00 667,955.00 Point 5 0.00 - 3,711.69 4,191.22 5,957,040.00 668,410.00 Point 6 0.00 - 4,013.41 4,494.73 5,956,745.00 668,720.00 C -12B Target 1 0.00 0.00 8,970.00 - 3,939.95 4,566.35 5,956,820.00 668,790.00 70° 17' 17.094 N 148° 38' 1.270 W - plan misses target center by 2.34ft at 12056.04ft MD (8971.01 ND, - 3941.80 N, 4565.35 E) - Point C -12B Fault 1 0.00 0.00 0.00 - 4,171.88 4,651.32 5,956,590.00 668,880.00 70° 17' 14.813 N 148° 37' 58.799 W - plan misses target center by 8483.41ft at 11300.00ft MD (8477.99 ND, - 3970.96 N, 4878.69 E) - Polygon Point 1 0.00 - 4,171.88 4,651.32 5,956,590.00 668,880.00 Point 2 0.00 - 3,773.33 5,410.26 5,957,005.00 669,630.00 • C -12B Fault 5 0.00 0.00 0.00 - 3,347.81 4,019.12 5,957,400.00 668,230.00 70° 17' 22.921 N 148° 38' 17.205 W 1 - plan misses target center by 8544.20ft at 11300.00ft MD (8477.99 ND, - 3970.96 N, 4878.69 E) - Polygon Point 1 0.00 - 3,347.81 4,019.12 5,957,400.00 668,230.00 Point 2 0.00 - 2,784.43 4,101.45 5,957,965.00 668,300.00 C -12B Target 3 0.00 0.00 8,965.00 - 3,473.20 3,806.31 5,957,270.00 668,020.00 70° 17' 21.689 N 148° 38' 23.408 W - plan misses target center by 2.04ft at 12969.93ft MD (8966.08 ND, - 3474.87 N, 3805.85 E) - Point C -12B Fault 3 0.00 0.00 0.00 - 3,539.99 4,345.02 5,957,215.00 668,560.00 70° 17' 21.029 N 148° 38' 7.712 W - plan misses target center by 8505.69ft at 11300.00ft MD (8477.99 ND, - 3970.96 N, 4878.69 E) - Polygon Point 1 0.00 - 3,539.99 4,345.02 5,957,215.00 668,560.00 Point 2 0.00 - 3,553.37 4,499.78 5,957,205.00 668,715.00 8/3/2009 4 :13 :21PM Page 6 COMPASS 2003.16 Build 71 1 pu s ett Baker Hughes INTEQ Planning Report 0 bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay ND Reference: Mean Sea Level Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wellbore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P C -12B Fault 2 0.00 0.00 0.00 - 3,977.13 4,665.57 5,956,785.00 668,890.00 70° 17' 16.728 N 148° 37' 58.380 W - plan misses target center by 8480.67ft at 11300.00ft MD (8477.99 ND, - 3970.96 N, 4878.69 E) - Polygon Point 1 0.00 - 3,977.13 4,665.57 5,956,785.00 668,890.00 Point 2 0.00 - 3,989.64 4,780.33 5,956,775.00 669,005.00 C -12B Fault 4 0.00 0.00 0.00 - 3,752.44 4,225.34 5,957,000.00 668,445.00 70° 17' 18.940 N 148° 38' 11.203 W 0 - plan misses target center by 8505.93ft at 11300.00ft MD (8477.99 ND, - 3970.96 N, 4878.69 E) - Polygon Point 1 0.00 - 3,752.44 4,225.34 5,957,000.00 668,445.00 Point 2 0.00 - 3,791.59 3,499.26 5,956,945.00 667,720.00 Casing Points Measured Vertical Casing Hole Depth Depth Diameter Diameter (ft) (ft) Name (in) (in) 13,000.00 8,965.98 2 -7/8" 2.875 4.125 • 8/3/2009 4:13:21 PM Page 7 COMPASS 2003.16 Build 71 Mill . s Baker Hughes INTEQ Planning Report 0 bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drillir Well: C -12 North Reference: True Wetlbore: Plan 3, C -12B Survey Calculation Method: Minimum Curvature Design: Plan #3 Database: EDM .16 - Anc Prod - WH24P Plan Annotations Measured Vertical Local Coordinates Depth Depth +N/-S +E/-W (ft) (ft) (ft) (ft) Comment 11,300.00 8,477.99 - 3,970.96 4,878.69 TIP 11,380.00 8,540.32 - 4,017.34 4,897.72 KOP 11,400.00 8,556.19 - 4,028.62 4,902.33 End of 9 Deg /100' DLS 11,482.00 8,629.26 - 4,062.15 4,916.03 4 11,512.00 8,658.47 - 4,068.70 4,917.65 5 11,542.00 8,688.08 - 4,073.12 4,916.02 6 11,572.00 8,717.61 - 4,075.19 4,911.28 7 11,602.00 8,746.68 - 4,074.30 4,904.03 8 11,632.00 8,774.81 - 4,070.44 4,894.42 9 11,792.00 8,888.21 - 4,023.33 4,796.95 10 11,869.00 8,921.72 - 4,005.39 4,730.41 11 11,943.00 8,952.17 - 3,988.39 4,665.51 12 12,036.59 8,971.02 - 3,950.30 4,582.85 End of 25 Deg /100' DLS 12,286.59 8,969.90 - 3,792.31 4,392.79 14 12,536.59 8,967.82 - 3,634.32 4,202.74 15 12,636.59 8,967.25 - 3,583.31 4,116.94 16 12,886.59 8,966.35 - 3,491.80 3,887.36 17 13,000.00 8,965.99 - 3,465.31 3,777.36 TD at 13000.00 I Checked By: Approved By: Date: 8/3/2009 4 :13:21PM Page 8 COMPASS 2003.16 Build 71 AGrnathe 10 nua None ' WELLBORE DETAILS: Plan 3, C-12B REFERENCE INFORMATION ra Project: Prudhoe Bay Magnedc Site: PB C Pad Co-ordinate (N /E) Reference: Well C -12 - Slot 12, True North BAKER ° Magnetic FieO Parent Wellbore: C -12 Well: C -12 Strength. 57668.5enT Vertical (TVD) Reference: Mean Sea Level N S 80 40.43° Tie °n MD: 11300.00 . 0 Section ) 1(`J Wellbore: Plan 3, C•126 c ge (VS) Reference: Slot - O.00 Plan: Plan #3 (C-12/Plan 3, C-12B) 713112005 Model del BGGM2005 S2 Measured Depth Reference: 14 : 1211/14/1979 00:00 62.90ft (generic drilling rig) j Calculation Method: Minimum Curvature 1NTEQ -3120 WELL DETAILS: C -12 -3200 Ground Level: 0.00 -3280 / I 12B ',alt 5 , N/-S +E / -W Northing Easling Latiltude Longitude Slot 0.00 0.00 5960659.00 664139.00 70° 17' 55.857 N 148° 40' 14.316 W 12 - C -12 /'Ian 3, C -12B -3360 .-.■'.. SECTION DETAILS ANNOTATIONS Sec MD Inc Azi ssND +N / - +E / - DLeg TFace VSec Target Annotation - 3441 1 11300.00 39.20 157.61 8477.99 - 3970.96 4878.69 0.00 0.00 - 6289.77 TIP �`���, ■ _ 2 11380.00 38.42 157.77 8540.32 -4017.34 4897.72 0.98 172.74 -6334.17 E - 3520 ' ®% 3 11400.00 36.62 157.77 8556.19 -4028.62 4902.33 9.00 180.00 -6344.95 End of 9 Deg/100' DLS 4 11482.00 16.12 157.77 8629.26 -4062.15 4916.03 25.00 180.00 -6377.00 4 -3,i' ' � , r � _ il i m'sgig' _ 5 11512.00 10.31 179.15 8658.47 -4068.70 4917.65 25.00 150.00 - 6382.45 5 6 11542.00 9.21 224.10 8688.08 -4073.12 4916.02 25.00 120.00 - 6384.04 6 0 C 2B T: 7 11572.00 11.86 263.54 8717.61 -4075.19 4911.28 25.00 90.00 -6381.74 7 00 - 3680 ..... 8 11602.00 16.89 286.45 8746.68 -4074.30 4904.03 25.00 60.00 - 6375.62 8 + ' • 11792.00 63.67 295.80 8888.21 - 4023.33 4796.95 25.00 30.00 - 6260.83 9 - 3760 , ,, ■� 10 11792.00 63.67 295.80 8888.21 4023.33 4796.95 25.00 0.00 6260.83 10 t ���" ,'P 11 11869.00 65.25 274.51 8921.72 - 4005.39 4730.41 25.00 270.00 - 6198.32 11 0 - 38.1 12 11943.00 66.60 294.74 8952.17 - 3988.39 4665.51 25.00 90.00 - 6137.67 12 X100' DLS ■ -4 • 13 12036.59 90.00 294.74 8971.02 - 3950.30 4582.85 25.00 0.00 - 6049E7 End of 25 ^ . 14 12286.59 90.50 324.74 8969.90 -3792.31 4392.79 12.00 89.00 -5802.72 14 3921 L IIIMESIIIP:1111 -■��:�M1 • 15 12536.59 90.43 294.73 8967.82 - 36634.32 2 . 5 4202.74 12.00 270.00 - 5555.58 15 16 12636.59 90.22 306.73 8967.25 - 3583.31 4116.94 12.00 91.00 - 5457.07 16 0 - 400 0 - - 17 12886.59 90.19 276.73 8966.35 - 3491.80 3887.36 12.00 270.00 -5222.37 17 C - 1B Tar et I �� 4 18 13000.00 90.18 290.34 8965.99 - 3465.31 3777.36 12.00 90.00 - 5121.08 TD at 13000.00 - 4080 1 r 9•x / \ 7 ��'6 -4160 E -4240 C- 2/C -I. A C- 12/C -1' i, -12/C 12AP0 1 - -- - -4320 3600 3680 3760 3920 4000 4080 4160 4240 4320 4400 4480 4560 4640 4720 4800 4880 4960 5040 8460 West(- )/East( +) (80 ft/in) 8520 TIP KO' 8580 End of g Deg/100' DLS 8640, - 8700_ 6 - ` 5 8760 7 N r r n 8820 C -12/ - 12AFB1 a ' 9 c> 8880 t 7 G12B Target C -12B Tar eta 1( C -12B T§ et 1 B 8 8940 / _ 1 N \ 12 - T 4e / x t K 9000 C- 12 /C -I 7A 1-4 15 14 1 End cf 25 D:g/100' DIS C- 12/Plrn 3, C 12B ce 9060 m 9120 C- 12/C -12 -6840 -6780 -6720 1 6660 -6600 -6540 -6480 -6420 -6360 -6300 -6240 -6180 -6120 -6060 1 6000 • -5880 -5820 -5760 -5700 -5640 1 5580 -5520 -5460 -5400 -5340 -5280 -5220 -5160 -5100 -5040 -4980 -4920 -4860 -4800 -4740 -4680 -4620 -4560 Vertical Section at 310.00° (60 ft/in) Project: Prudhoe Bay Ma Azim gnetic uths 10 NoM: True N 6° WELLBORE DETAILS: lbore: Plan 3, C -12B REFERENCE INFORMATION KS ill 2 25 Site: PB C Pad Co-ordinate (N1E) Reference: Wet C -12 - Slot 12, True North BAKER . Magnetic visa Parent Wel C - Well: C -12 SuengO 57066 VerOral (1)0) Reference: 14:12 1111411979 00:00 @ 62.901: (generic dolling r2, Tie on MD: 11300.00 Section Wellbore• Plan 3, C -126 Date: Angie. eo as° Measured (VS) Reference: 14 : - 12(0. 79 0.00E) 00: • 0 bp P lan: Plan #3 (C-12/Plan 3, C•12B) Ab Date: GGAl22005 Measured Depth Reference: 11:12 1111411979 00:00 @ 62.90fl (generic dnlNng rig Calculation Method: Minimum Curvature INTEQ -2200 •2300 iII IIIIIIIIIIHI °2400 -2500 11— 1 ■ 1 -321 -2600 -2700 -2800 . -2900 -3001 , , IlI hi -3100 -3200 C -0. C ^ 35 01 I.\■■■■...� ,''■■■,..■■■■■.M.■''■, 1 -3601 I1MI.■■■■■.���� �",',N11.,.■■■■.�®�.■',, ^ °3701 I ■■■■..■■■■::= � ,"■■,■■■■■■■■.■■■. -3811 I' ENI ■..■■■■•.. VI -3901 I■, �, \)(■■■■■..■■■■■■„'M■ � ../.■■■■■■. °4001 I.■ 1,_- 11..■■■■■■■■■■ INICEI M ;.■■■■.■■■. -4100 -430 1 , ` _' t e,\ - 4401 I■■.■...■■.,',.■■... ommu ■■�l�:.w■■■■■■■■. A ,,, N -4500 a .4600 C•111111111111111111111 EIMIl■ni.■■■■■.■■■. 8 -4700 o r 0 a 0 4800 @e C- 2/C- 2AP:1 W -4900 2,9 . § 2300 2400 2500 2600 2700 2800 2900 3O-I),-100 3300 3400 3500 3600 3700 3800 3900 4000 4100 ' 4200 4300 4400 4500 4600 4700 4800 4900 5000 5100 5200 5300 5400 5500 5600 5700 5800 5900 6000 West(- )/East( +) (100 ft/in) Project: Prudhoe Bay ANTI - COLLISION SETTINGS COMPANY DETAILS . Nom Amaiu - AIAMtA - IIR NORTH AMERICA Mill ' 0 Site: PB C Pad Well: C -12 ALASKA Method: MD interval: 100.00 Depth Range From: 11300.00 To 13000.00 Distance: C''''''= lrl� M.Ma4. Mlmum cMC'''''''' C'''''''' sR bP Results Limited By: Centre Dist 1497.01 Erw SYOem IscwsA HUGHES Sun Metl�e Wellbore: Plan 3, C -12B Reference: Plan: Plan #3 (G72/Plan 3, C-128) Error we. 4 T m Based N Genic om Wiled Wiled Plan: Plan 03 (C•12/Plan 3, C -128) w.n:� o4 Rules "e4 1NTEQ WELL DETAILS: C.12 Ground Level: 0.00 +NI -S +EI -W Northing Easting Latittude Longi Slot From Colour To MD 0.00 0.00 5960609.00 664139.00 70° 17' 55. N 148' 40' 14.3 W 12 SECTION DETAILS Sec MD Inc Ael 'ND +W -S eEl -W DLeg TFaoe VSec Target 0 1 11300.00 39.20 157.61 8540.89 - 3970.96 4878.69 0 00 0.00 - 6289.77 2 7138000 3842 757.77 8603.22 - 407734 4897.72 0.98 17271 6334.17 %/� , ]I) - 3 11400.00 3662 157.77 8619.09 - 4028 fit 4902.33 5.00 180 00 - 6347.95 _ 9�. \ 4 1146200 1812 757.77 8692.16 -406215 491603 25.00 150.00 - 6377 �� \ 0 5 11572.00 ill 1 179,15 87 - 4066.70 4917.65 25 00 I 00 - 382.45 33' %/' \ 6 11642 00 1 224.70 8750.98 - 4073.12 491602 25.00 7 112.00 8 263.54 878080 51 .51 - 4075.19 4911.28 25.00 - \ 11200 9 296.45 8809.58 - 4074.30 490403 25.00 \ 112.00 7 295.80 8937.71 -4070 44 4794.42 2500 .00 - 6365. 77 1�// _ 16: -- \ 10 17792.00 63.67 295.80 8951.11 - 4023.33 4796.95 2500 0.00 -6260.83 11 17869.00 no iu - 4005.39 4730.41 25.00 270 00 -619632 1943.00 3988 39 4665.51 25.00 90 ca 6137 67 203 59 - 3950.30 4582.65 25.00 000 5049 87 259 - 3782.31 4392.79 12.00 89.00 5802. 2536 6 59 -3634 82 4202.74 12.00 270.00 5555.58 2636636 .59 - 3563.31 477694 12.00 91.00 5457.07 288-6.59 - 3491.80 3887.36 1200 270 OD - 5222.37 3000.00 290.34 90 - 3465.31 3777.36 12.00 90.00 - 5121.08 300 112 \ \ 1 86:_i - \ SURVEY PROGRAM i ii \%\\\‘ Dale: 2009 -07- 31700:00:00 Validated: Yes Version: �� - \\\\\\\N Dep 11300.00 th From 13000 Depth .00 To Plan urve#3 ylPlan Pa nn Tool ����j 48 \\‘‘‘\\\%\t% BOS ZByro multMB�b'&{GYRO IIII II ( I I I I I I I I I I I I II 1111111 32 1s l IIIIIIillllllllllllllll _ ��r�., " 1111111111111 // LEGEND 271 11111ktiVt 11300 IIIIIIIIII 9U M.,o IIIIIIIII -. � " ,. �, J� / III II 64_x:. 1 1 \ 1 \ 0 \ / 1156 1 / aa.10,.......51 . fa La, panIf2 % 120 ...0 Caaavavo ,■, ",.,o "me „arn,,e \ ` \ ` 14 ..2 .321Lcasarv. .422 .39C iamvls 1 - ---... % ''' %% : ................... ....._,g, ' ' ' . . . . ' " ' .....'.*'.. . .. ''''.." :: " .1 . _ _ _ _ ' 15 0 C 12/C 12 • " 10 Travelling Cylinder Azimuth (TFO +AZI) [ °] vs Centre to Centre Separation [16 ft/in] -�a ▪ " • • • r u BAKER MGM INTEQ North America - ALASKA - BP Prudhoe Bay PB C Pad C -12 Plan 3, C -12B Plan #3 Travelling Cylinder Report 31 July, 2009 � bp . NMI • • B USSES Travelling Cylinder Report bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset ND Reference: Offset Datum Reference Plan #3 Filter type: GLOBAL FILTER APPLIED: All wellpaths within 200'+ 100/1000 of refer( Interpolation Method: MD Interval 25.00ft Error Model: ISCWSA Depth Range: 11,300.00 to 13,000.00ft Scan Method: Tray. Cylinder North Results Limited by: Maximum center - center distance of 1,497.01ft Error Surface: Elliptical Conic Survey Tool Program Date 7/31/2009 From To (ft) (ft) Survey (Welibore) Tool Name Description 100.00 11,300.00 1 : Sperry-Sun BOSS gyro multi (C -12) BOSS -GYRO Sperry-Sun BOSS gyro multishot 11,300.00 13,000.00 Plan #3 (Plan 3, C -12B) MWD MWD - Standard 1 Casing Points Measured Vertical Casing Hole Depth Depth Diameter Diameter (ft) (ft) Name (in) (in) 13,000.00 8,965.98 2 -7/8" 2.875 4.125 Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well - Welibore - Design (ft) (ft) (ft) (ft) PB C Pad C -03 - C -03A - C -03A Out of range C -10 - C -10 - C -10 Out of range C -10 - C -10A - C -10A 12,075.00 12,350.00 785.03 1,232.38 - 447.27 FAIL - Major Risk C -10 - C -10A - C -10A wp05 12,064.51 12,378.49 776.67 1,230.15 - 453.45 FAIL - Major Risk C -12 - C -12 - C -12 11,424.79 11,425.00 2.28 23.11 -5.42 FAIL - Major Risk C -12 - C -12A - C -12A 11,424.79 11,425.00 2.28 23.11 -5.42 FAIL - Major Risk C -12 - C- 12APB1 - C- 12APB1 11,424.79 11,425.00 2.28 23.11 -5.42 FAIL - Major Risk C-13-C-13-C-13 Out of range C -13A - C -13A - C -13A Out of range C -14 - C -14 - C -14 Out of range C -20 - C -20 - C -20 Out of range C -20 - C -20A - C -20A Out of range C -20 - C -20B - C -20B Out of range C -31 - C -31 B - C -31 B 11,680.00 13,688.00 859.35 1,283.72 - 415.41 FAIL - Major Risk C -31 - C -31 B - Plan #6 11,780.00 13,825.00 842.26 1,275.73 - 433.40 FAIL - Major Risk C -32 - C -32 - C -32 Out of range C -32 - C -32A - C -32A Out of range C -32 - C -32B - C -32B Out of range C -32 - C -32B - C -32B wp07 Out of range C -32 - C -32C - C -32C 12,775.00 11,000.00 1,287.51 1,630.22 - 333.28 FAIL - Major Risk C -32 - C -32C - Plan #4 12,775.00 11,025.00 1,277.77 1,630.20 - 343.05 FAIL - Major Risk C -37 - C -37A - C -37A Out of range C -37 - C -37A - Plan #3 Out of range C -37 - C- 37APB1 - C- 37APB1 Out of range CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 2 of 14 COMPASS 2003.16 Build 71 . N.li II • . Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay ND Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig: Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset ND Reference: Offset Datum Offset Design PB C Pad - C -10 - C -10A - C -10A Offset Site Error: 0.00ft Survey Program: 100- GYD -CT -CMS, 8505-MWD+IFR+MS Rule Assigned: Major Risk Offset Well Error: 0.00 ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +N/-S +E/ -W Hole Size Centre Distance Deviation (ft) (ft) (f) (ft) (ft) (ft) P) (ft) (ft) (ft) (ft) (ft) (ft) 12,065.56 8,971.00 12,360.00 8,963.19 377.98 29.71 - 151.21 -4,627.06 4,186.89 0.29 782.71 1,226.89 -444.12 FAIL - Major Risk, CC 12,075.00 8,970.99 12,325.00 8,961.75 377.98 29.64 - 149.98 - 4,617.80 4,153.17 0.29 790.98 1,234.12 - 443.04 FAIL - Major Risk 12,075.00 8,970.99 12,350.00 8,962.78 377.98 29.69 - 150.05 - 4,624.41 4,177.25 0.29 785.03 1,232.38 - 447.27 FAIL - Major Risk, ES, SF 12,087.47 8,970.97 12,300.00 8,960.75 377.98 29.58 - 148.42 - 4,611.15 4,129.09 0.29 797.39 1,240.87 - 443.38 FAIL - Major Risk 12,100.00 8,970.94 12,250.00 8,959.12 377.99 29.46 - 146.82 - 4,597.47 4,081.02 0.29 811.25 1,245.61 -434.22 FAIL - Major Risk 12,100.00 8,970.94 12,275.00 8,959.88 377.99 29.52 - 146.86 -4,604.34 4,105.05 0.29 804.12 1,245.85 -441.60 FAIL - Major Risk 12,114.19 8,970.91 12,225.00 8,958.44 377.99 29.40 - 145.08 -4,590.44 4,057.04 0.29 818.59 1,250.29 -431.54 FAIL - Major Risk 12,125.00 8,970.87 12,175.00 8,957.26 377.99 29.28 - 143.72 -4,575.60 4,009.31 0.29 833.99 1,252.87 -418.70 FAIL - Major Risk 12,125.00 8,970.87 12,200.00 8,957.79 377.99 29.34 - 143.74 -4,583.17 4,033.13 0.29 826.20 1,253.09 -426.72 FAIL - Major Risk 12,140.25 8,970.82 12,150.00 8,956.90 378.00 29.23 - 141.88 -4,567.71 3,985.59 0.29 841.75 1,255.88 -413.93 FAIL - Major Risk 12,150.00 8,970.78 12,100.00 8,956.47 378.00 29.11 - 140.70 -4,551.85 3,938.18 0.29 858.69 1,256.88 - 397.99 FAIL - Major Risk 12,150.00 8,970.78 12,125.00 8,956.63 378.00 29.17 - 140.70 -4,559.76 3,961.89 0.29 849.96 1,257.08 -406.93 FAIL - Major Risk 12,165.49 8,970.72 12,075.00 8,956.81 378.01 29.06 - 138.88 -4,543.92 3,914.47 0.29 867.65 1,257.89 - 390.06 FAIL - Major Risk 12,175.00 8,970.67 12,025.00 8,957.99 378.01 28.94 - 137.84 -4,526.69 3,867.55 0.29 885.64 1,257.60 - 371.82 FAIL - Major Risk 12,175.00 8,970.67 12,050.00 8,957.32 378.01 29.00 - 137.78 -4,535.65 3,890.88 0.29 876.75 1,257.80 - 380.88 FAIL - Major Risk 12,190.17 8,970.59 12,000.00 8,958.83 378.01 28.89 - 136.08 -4,516.87 3,844.58 0.29 893.89 1,256.60 - 362.59 FAIL - Major Risk 12,200.00 8,970.53 11,950.00 8,960.55 378.02 28.78 - 135.03 -4,494.86 3,799.73 0.29 909.39 1,255.06 - 345.57 FAIL - Major Risk 12,200.00 8,970.53 11,975.00 8,959.73 378.02 28.83 - 134.97 -4,506.16 3,822.01 0.29 901.72 1,255.24 - 353.42 FAIL - Major Risk 12,214.75 8,970.44 11,925.00 8,961.01 378.02 28.72 - 133.29 -4,483.49 3,777.47 0.29 917.27 1,252.15 - 334.80 FAIL - Major Risk 12,225.00 8,970.38 11,875.00 8,960.84 378.03 28.61 - 132.08 -4,460.61 3,733.01 0.29 934.30 1,249.23 - 314.85 FAIL - Major Risk 12,225.00 8,970.38 11,900.00 8,961.11 378.03 28.67 - 132.08 -4,472.06 3,755.23 0.29 925.59 1,249.41 - 323.74 FAIL - Major Risk 12,238.61 8,970.28 11,850.00 8,960.50 378.03 28.56 - 130.43 -4,449.19 3,710.78 0.29 943.34 1,244.79 - 301.37 FAIL - Major Risk 12,575.00 8,967.55 11,825.00 8,960.32 378.19 28.51 - 150.23 - 4,437.85 3,688.49 0.29 951.06 1,233.99 - 282.89 FAIL - Major Risk 12,588.74 8,967.47 11,800.00 8,960.30 378.20 28.46 - 148.58 -4,426.75 3,666.10 0.29 952.81 1,240.45 - 287.60 FAIL - Major Risk 12,925.00 8,966.23 11,775.00 8,960.39 378.43 28.41 - 168.31 -4,415.96 3,643.54 0.29 952.73 1,102.82 - 150.08 FAIL - Major Risk 12,939.53 8,966.18 11,750.00 8,960.35 378.44 28.36 - 166.56 -4,405.86 3,620.68 0.29 947.79 1,120.50 - 172.69 FAIL - Major Risk 12,950.00 8,966.15 11,700.00 8,959.32 378.45 28.27 - 165.25 -4,388.05 3,573.98 0.29 941.95 1,132.41 - 190.44 FAIL - Major Risk 12,950.00 8,966.15 11,725.00 8,960.08 378.45 28.32 - 165.29 -4,396.54 3,597.48 0.29 944.19 1,132.59 - 188.39 FAIL - Major Risk 12,964.58 8,966.10 11,675.00 8,958.62 378.46 28.23 - 163.45 -4,379.94 3,550.34 0.29 940.43 1,148.45 - 207.99 FAIL - Major Risk 12,975.00 8,966.06 11,625.00 8,958.70 378.47 28.14 - 162.21 -4,364.74 3,502.71 0.29 939.98 1,159.06 - 219.05 FAIL - Major Risk 12,975.00 8,966.06 11,650.00 8,958.41 378.47 28.18 - 162.19 -4,372.16 3,526.59 0.29 939.77 1,159.23 - 219.42 FAIL - Major Risk 12,989.84 8,966.02 11,600.00 8,959.14 378.49 28.10 - 160.46 -4,357.30 3,478.85 0.29 940.47 1,173.58 - 233.08 FAIL - Major Risk 13,000.00 8,965.99 11,575.00 8,959.79 378.49 28.06 - 159.28 -4,349.80 3,455.01 0.29 941.41 1,182.85 - 241.42 FAIL - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 3 of 14 COMPASS 2003.16 Build 71 NEU 0 0 Mii SS Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig: Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset ND Reference: Offset Datum Offset Design PB C Pad - C -10 - C -10A - C -10A wp05 Offset Site Error: 0.00ft Survey Program: 100- GYD-CT -CMS, 8500- MWD +IFR +MS Rule Assigned: Major Risk Offset Well Error: 0.00ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +NfS +ef -w Hole Size Centre Distance Deviation (ft) (ft) (ft) (ft) (ft) (ft) (°) (ft) (ft) (ft) (ft) (ft) (ft) 12,064.51 8,971.00 12,378.49 8,965.48 377.98 29.79 - 151.50 - 4,623.05 4,192.16 0.36 776.67 1,230.15 - 453.45 FAIL- Major Risk, CC, ES, S 12,065.81 8,971.00 12,375.00 8,965.48 377.98 29.78 - 151.35 - 4,622.15 4,188.78 0.36 777.47 1,230.85 - 453.35 FAIL - Major Risk 12,075.00 8,970.99 12,350.00 8,965.48 377.98 29.72 - 150.25 - 4,615.67 4,164.63 0.36 783.43 1,235.54 - 452.09 FAIL - Major Risk 12,084.15 8,970.98 12,325.00 8,965.48 377.98 29.66 - 149.15 - 4,609.20 4,140.49 0.36 789.85 1,239.79 - 449.90 FAIL - Major Risk 12,100.00 8,970.94 12,275.00 8,965.48 377.99 29.54 - 147.26 - 4,596.26 4,092.19 0.36 804.08 1,246.05 -441.94 FAIL - Major Risk 12,100.00 8,970.94 12,300.00 8,965.48 377.99 29.60 - 147.26 -4,602.73 4,116.34 0.36 796.81 1,246.28 - 449.43 FAIL - Major Risk 12,110.94 8,970.92 12,250.00 8,965.48 377.99 29.48 - 145.96 - 4,589.78 4,068.04 0.36 811.85 1,249.70 -437.82 FAIL - Major Risk 12,125.00 8,970.87 12,200.00 8,965.48 377.99 29.37 - 144.28 -4,576.84 4,019.75 0.36 828.72 1,253.32 - 424.57 FAIL - Major Risk 12,125.00 8,970.87 12,225.00 8,965.48 377.99 29.42 - 144.27 - 4,583.31 4,043.90 0.36 820.11 1,253.54 - 433.39 FAIL - Major Risk 12,136.76 8,970.83 12,175.00 8,965.48 378.00 29.31 - 142.88 -4,570.37 3,995.60 0.36 837.76 1,255.70 - 417.91 FAIL - Major Risk 12,150.00 8,970.78 12,125.00 8,965.48 378.00 29.20 - 141.30 4,557.42 3,947.31 0.36 857.11 1,257.33 - 400.19 FAIL - Major Risk 12,150.00 8,970.78 12,150.00 8,965.48 378.00 29.26 - 141.29 -4,563.89 3,971.45 0.36 847.27 1,257.54 -410.24 FAIL - Major Risk 12,161.50 8,970.73 12,100.00 8,965.48 378.01 29.15 - 139.93 -4,550.95 3,923.16 0.36 867.36 1,258.15 - 390.76 FAIL - Major Risk 12,175.00 8,970.67 12,050.00 8,965.48 378.01 29.04 - 138.32 -4,538.00 3,874.86 0.36 889.03 1,258.08 - 369.02 FAIL - Major Risk 12,175.00 8,970.67 12,075.00 8,965.48 378.01 29.09 - 138.31 -4,544.48 3,899.01 0.36 878.05 1,258.27 - 380.19 FAIL - Major Risk 12,185.13 8,970.62 12,025.00 8,965.48 378.01 28.99 - 137.11 -4,531.53 3,850.71 0.36 900.41 1,257.48 - 357.05 FAIL - Major Risk 12,200.00 8,970.53 11,950.00 8,965.48 378.02 28.84 - 135.35 -4,512.11 3,778.27 0.36 936.76 1,255.37 - 318.58 FAIL - Major Risk 12,200.00 8,970.53 11,975.00 8,965.48 378.02 28.89 - 135.34 -4,518.59 3,802.42 0.36 924.24 1,255.54 - 331.28 FAIL - Major Risk 12,200.00 8,970.53 12,000.00 8,965.48 378.02 28.94 - 135.33 -4,525.06 3,826.57 0.36 912.23 1,255.72 - 343.46 FAIL - Major Risk 12,214.81 8,970.44 11,925.00 8,965.48 378.02 28.79 - 133.58 -4,505.64 3,754.12 0.36 949.42 1,252.46 - 303.02 FAIL - Major Risk 12,225.00 8,970.38 11,875.00 8,965.48 378.03 28.69 - 132.37 -4,492.70 3,705.83 0.36 975.92 1,249.58 - 273.64 FAIL - Major Risk 12,225.00 8,970.38 11,900.00 8,965.48 378.03 28.74 - 132.36 -4,499.17 3,729.98 0.36 962.52 1,249.74 - 287.20 FAIL - Major Risk 12,235.74 8,970.30 11,850.00 8,965.48 378.03 28.64 - 131.09 -4,486.13 3,681.71 0.36 989.50 1,246.14 - 256.61 FAIL - Major Risk 12,575.00 8,967.55 11,825.00 8,965.48 378.19 28.60 - 150.55 -4,479.16 3,657.70 0.36 1,002.25 1,234.22 - 231.96 FAIL - Major Risk 12,590.17 8,967.47 11,800.00 8,965.48 378.20 28.55 - 148.72 - 4,471.77 3,633.82 0.36 1,008.00 1,241.32 - 233.31 FAIL - Major Risk 12,938.61 8,966.18 11,775.00 8,965.48 378.44 28.50 - 166.98 -4,463.97 3,610.07 0.36 1,006.78 1,119.64 - 112.87 FAIL - Major Risk 12,950.00 8,966.15 11,725.00 8,965.48 378.45 28.41 - 165.62 - 4,447.12 3,562.99 0.36 1,001.80 1,132.66 - 130.86 FAIL - Major Risk 12,950.00 8,966.15 11,750.00 8,965.48 378.45 28.46 - 165.62 -4,455.75 3,586.45 0.36 1,004.30 1,132.84 - 128.54 FAIL - Major Risk 12,962.68 8,966.10 11,700.00 8,965.48 378.46 28.36 - 164.10 -4,438.09 3,539.68 0.36 999.24 1,146.65 - 147.41 FAIL - Major Risk 12,975.00 8,966.06 11,650.00 8,965.48 378.47 28.27 - 162.63 -4,418.80 3,493.55 0.36 994.16 1,159.35 - 165.19 FAIL - Major Risk 12,975.00 8,966.06 11,675.00 8,965.48 378.47 28.32 - 162.62 -4,428.65 3,516.53 0.36 996.72 1,159.51 - 162.79 FAIL - Major Risk 12,986.86 8,966.03 11,625.00 8,965.48 378.48 28.23 - 161.20 -4,408.56 3,470.75 0.36 991.56 1,171.03 - 179.47 FAIL - Major Risk 13,000.00 8,965.99 11,600.00 8,965.48 378.49 28.18 - 159.63 -4,397.92 3,448.12 0.36 989.02 1,183.17 - 194.16 FAIL - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 4 of 14 COMPASS 2003.16 Build 71 . N.r 411 ill sw Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay ND Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset ND Reference: Offset Datum Offset Design PB C Pad - C -12 - C -12 - C -12 Offset Site Error: 0.00ft Survey Program: 100 - BOSS -GYRO Rule Assigned: Major Risk Offset Well Error: 0.00 ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +NIS +EI -W Hole Size Centre Distance Deviation Iii) (ft) (ft) (fi) (ft) (it) (°) (ft) (ft) (ft) (it) Off) (ft) 11,300.00 8,477.99 11,300.00 8,477.99 0.00 0.00 157.61 - 3,970.96 4,878.69 0.29 0.00 0.29 -0.29 FAIL - Major Risk, CC 11,325.00 8,497.39 11,325.00 8,497.39 0.55 1.08 -16.19 - 3,985.53 4,884.68 0.29 0.00 5.42 -1.20 FAIL - Major Risk 11,350.00 8,516.87 11,350.00 8,516.87 1.09 2.15 - 16.18 - 4,000.04 4,890.64 0.29 0.00 10.54 -2.09 FAIL - Major Risk 11,375.00 8,536.41 11,375.00 8,536.41 1.64 3.23 -16.17 - 4,014.47 4,896.54 0.29 0.00 15.66 -3.00 FAIL - Major Risk 11,399.99 8,556.18 11,400.00 8,556.02 1.75 4.30 158.59 - 4,028.82 4,902.41 0.29 0.28 19.53 -4.42 FAIL - Major Risk 11,424.79 8,576.84 11,425.00 8,575.69 1.75 5.35 157.88 - 4,043.11 4,908.25 0.29 2.28 23.11 -5.42 FAIL - Major Risk, ES, SF 11,448.90 8,598.24 11,450.00 8,595.41 1.75 6.39 157.64 -4,057.32 4,914.08 0.29 6.85 26.75 -3.67 FAIL - Major Risk 11,471.88 8,619.61 11,475.00 8,615.19 1.75 7.44 157.54 - 4,071.46 4,919.90 0.29 13.82 30.38 0.65 Pass - Major Risk 11,493.55 8,640.42 11,500.00 8,635.02 1.75 8.48 157.29 - 4,085.52 4,925.71 0.29 22.98 33.66 7.36 Pass - Major Risk 11,513.83 8,660.28 11,525.00 8,654.91 1.75 9.50 155.90 - 4,099.51 4,931.51 0.29 33.91 36.92 16.01 Pass - Major Risk 11,532.77 8,678.96 11,550.00 8,674.87 1.75 10.51 154.13 - 4,113.42 4,937.28 0.29 46.38 40.54 26.46 Pass - Major Risk 11,549.96 8,695.93 11,575.00 8,694.90 1.75 11.53 152.38 -4,127.24 4,943.02 0.29 60.21 43.92 38.49 Pass - Major Risk 11,565.39 8,711.13 11,600.00 8,714.99 1.75 12.54 151.00 - 4,140.98 4,948.74 0.29 75.37 47.14 52.03 Pass - Major Risk 11,580.00 8,725.42 11,625.00 8,735.14 1.75 13.52 150.00 - 4,154.64 4,954.41 0.29 91.68 50.05 66.88 Pass - Major Risk 11,591.80 8,736.87 11,650.00 8,755.36 1.75 14.51 149.28 - 4,168.23 4,960.04 0.29 109.00 52.97 82.95 Pass - Major Risk 11,602.00 8,746.68 11,675.00 8,775.63 1.75 15.49 148.76 - 4,181.75 4,965.62 0.29 127.18 56.03 100.00 Pass - Major Risk 11,613.41 8,757.52 11,700.00 8,795.97 1.75 16.47 148.36 - 4,195.20 4,971.14 0.29 146.07 58.82 117.74 Pass - Major Risk 11,622.75 8,766.27 11,725.00 8,816.35 1.75 17.44 148.02 - 4,208.60 4,976.62 0.29 165.60 61.68 136.27 Pass - Major Risk 11,632.00 8,774.81 11,750.00 8,836.78 1.75 18.40 147.76 - 4,221.96 4,982.03 0.29 185.67 64.35 155.38 Pass - Major Risk 11,640.00 8,782.08 11,775.00 8,857.24 1.75 19.36 147.37 - 4,235.29 4,987.37 0.29 206.19 66.92 175.05 Pass - Major Risk 11,646.96 8,788.31 11,800.00 8,877.74 1.75 20.32 147.00 - 4,248.58 4,992.66 0.29 227.08 69.44 195.15 Pass - Major Risk 11,653.91 8,794.43 11,825.00 8,898.28 1.75 21.26 146.63 - 4,261.83 4,997.92 0.29 248.31 71.84 215.63 Pass - Major Risk 11,660.00 8,799.71 11,850.00 8,918.85 1.75 22.20 146.28 - 4,275.03 5,003.17 0.29 269.85 74.21 236.46 Pass - Major Risk 11,666.18 8,804.98 11,875.00 8,939.46 1.75 23.15 145.93 - 4,288.17 5,008.42 0.29 291.65 76.60 257.58 Pass - Major Risk 11,671.62 8,809.55 11,900.00 8,960.10 1.75 24.09 145.60 - 4,301.27 5,013.67 0.29 313.70 79.00 278.97 Pass - Major Risk 11,680.00 8,816.44 11,925.00 8,980.78 1.75 25.02 145.30 - 4,314.31 5,018.88 0.29 335.98 81.15 300.57 Pass - Major Risk 11,680.00 8,816.44 11,950.00 9,001.51 1.75 25.95 145.01 - 4,327.32 5,024.01 0.29 358.37 83.74 322.46 Pass - Major Risk 11,680.00 8,816.44 11,975.00 9,022.26 1.75 26.88 144.75 - 4,340.30 5,029.09 0.29 381.06 86.31 344.66 Pass - Major Risk 11,689.85 8,824.32 12,000.00 9,043.01 1.75 27.80 144.49 - 4,353.28 5,034.18 0.29 403.72 88.20 366.65 Pass - Major Risk 11,693.65 8,827.29 12,025.00 9,063.76 1.75 28.73 144.26 - 4,366.27 5,039.27 0.29 426.64 90.46 389.03 Pass - Major Risk 11,700.00 8,832.16 12,050.00 9,084.51 1.75 29.66 144.04 - 4,379.25 5,044.35 0.29 449.73 92.47 411.55 Pass - Major Risk 11,700.00 8,832.16 12,075.00 9,105.26 1.75 30.58 143.83 - 4,392.23 5,049.44 0.29 472.90 94.98 434.24 Pass - Major Risk 11,700.00 8,832.16 12,100.00 9,126.01 1.75 31.51 143.64 - 4,405.21 5,054.52 0.29 496.25 97.49 457.10 Pass - Major Risk 11,700.00 8,832.16 12,105.00 9,130.16 1.75 31.70 143.61 - 4,407.81 5,055.54 0.29 500.94 97.99 461.70 Pass - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 5 of 14 COMPASS 2003.16 Build 71 was i 0 Was Travelling Cylinder Report 0 bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Weil: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Offset Design PB C Pad - C -12 - C -12A - C -12A Offset Site Error. 0.00ft Survey Program: 100-BOSS-GYRO, 11662-MWD, 11882-MWD Rule Assigned: Major Risk Offset Well Error: 0.0011 Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing • Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +NI-S +E! -W Hole Size Centre Distance Deviation NO (ft) NO (ft) (ft) (ft) (*) (ft) (ft) (ft) (ft) (ft) (ft) 11,300.00 8,477.99 11,300.00 8,477.99 0.00 0.00 157.61 - 3,970.96 4,878.69 0.29 0.00 0.29 -0.29 FAIL - Major Risk, CC 11,325.00 8,497.39 11,325.00 8,497.39 0.55 1.08 -16.19 - 3,985.53 4,884.68 0.29 0.00 5.42 -1.20 FAIL - Major Risk 11,350.00 8,516.87 11,350.00 8,516.87 1.09 2.15 - 16.18 - 4,000.04 4,890.64 0.29 0.00 10.54 -2.09 FAIL - Major Risk 11,375.00 8,536.41 11,375.00 8,536.41 1.64 3.23 -16.17 - 4,014.47 4,896.54 0.29 0.00 15.66 -3.00 FAIL - Major Risk 11,399.99 8,556.18 11,400.00 8,556.02 1.75 4.30 158.59 - 4,028.82 4,902.41 0.29 0.28 19.53 -4.42 FAIL - Major Risk 11,424.79 8,576.84 11,425.00 8,575.69 1.75 5.35 157.88 - 4,043.11 4,908.25 0.29 2.28 23.11 -5.42 FAIL - Major Risk, ES, SF 11,448.90 8,598.24 11,450.00 8,595.41 1.75 6.39 157.64 - 4,057.32 4,914.08 0.29 6.85 26.75 -3.67 FAIL - Major Risk 11,471.88 8,619.61 11,475.00 8,615.19 1.75 7.44 157.54 -4,071.46 4,919.90 0.29 13.82 30.38 0.65 Pass - Major Risk 11,493.55 8,640.42 11,500.00 8,635.02 1.75 8.48 157.29 -4,085.52 4,925.71 0.29 22.98 33.66 7.36 Pass - Major Risk 11,513.83 8,660.28 11,525.00 8,654.91 1.75 9.50 155.90 -4,099.51 4,931.51 0.29 33.91 36.92 16.01 Pass - Major Risk 11,532.77 8,678.96 11,550.00 8,674.87 1.75 10.51 154.13 - 4,113.42 4,937.28 0.29 46.38 40.54 26.46 Pass - Major Risk 11,549.96 8,695.93 11,575.00 8,694.90 1.75 11.53 152.38 -4,127.24 4,943.02 0.29 60.21 43.92 38.49 Pass - Major Risk 11,565.39 8,711.13 11,600.00 8,714.99 1.75 12.54 151.00 -4,140.98 4,948.74 0.29 75.37 47.14 52.03 Pass - Major Risk 11,580.00 8,725.42 11,625.00 8,735.14 1.75 13.53 150.00 -4,154.64 4,954.41 0.29 91.68 50.08 66.87 Pass - Major Risk 11,591.74 8,736.81 11,650.00 8,755.27 1.75 14.35 149.31 -4,168.35 4,960.06 0.29 109.09 51.37 87.42 Pass - Major Risk 11,602.00 8,746.68 11,675.00 8,774.40 1.75 14.58 149.15 -4,183.35 4,965.87 0.29 128.39 51.14 111.85 Pass - Major Risk 11,610.89 8,755.15 11,700.00 8,792.43 1.75 14.58 149.22 -4,199.54 4,972.00 0.29 149.22 51.12 132.59 Pass - Major Risk 11,620.00 8,763.71 11,725.00 8,809.44 1.75 14.58 149.44 -4,216.70 4,978.41 0.29 171.21 51.09 154.48 Pass - Major Risk 11,623.35 8,766.83 11,750.00 8,824.82 1.75 14.58 149.74 -4,235.19 4,985.17 0.29 194.28 51.09 177.49 Pass - Major Risk 11,627.24 8,770.44 11,775.00 8,838.33 1.75 14.58 150.45 -4,255.28 4,991.35 0.29 218.07 51.10 201.21 Pass - Major Risk 11,632.00 8,774.81 11,800.00 8,850.02 1.75 14.58 151.52 -4,276.78 4,996.44 0.29 242.16 51.08 225.27 Pass - Major Risk 11,632.00 8,774.81 11,825.00 8,860.17 1.75 14.58 152.72 -4,299.28 5,000.36 0.29 266.23 51.15 249.38 Pass - Major Risk 11,632.00 8,774.81 11,850.00 8,869.00 1.75 14.59 154.04 -4,322.50 5,003.13 0.29 290.21 51.22 273.50 Pass - Major Risk 11,634.62 8,777.21 11,875.00 8,877.66 1.75 14.59 154.98 -4,345.62 5,007.02 0.29 314.58 51.23 298.06 Pass - Major Risk 11,635.67 8,778.17 12,500.00 8,964.62 1.75 14.71 175.55 -4,938.82 4,925.52 0.29 889.40 52.65 870.59 Pass - Major Risk 11,635.68 8,778.17 11,900.00 8,886.91 1.75 14.59 155.44 -4,368.11 5,012.77 0.29 339.34 51.29 322.93 Pass - Major Risk 11,635.68 8,778.17 12,475.00 8,963.89 1.75 14.70 174.82 -4,915.66 4,934.89 0.29 867.02 52.61 848.99 Pass - Major Risk 11,636.00 8,778.46 12,450.00 8,963.74 1.75 14.69 174.09 -4,892.16 4,943.42 0.29 844.55 52.56 827.29 Pass - Major Risk 11,636.01 8,778.48 12,525.00 8,966.03 1.75 14.71 176.27 -4,961.57 4,915.25 0.29 911.62 52.68 892.05 Pass - Major Risk 11,636.62 8,779.03 12,425.00 8,964.18 1.75 14.69 173.36 -4,868.38 4,951.13 0.29 822.02 52.50 805.56 Pass - Major Risk 11,636.73 8,779.12 12,550.00 8,968.15 1.75 14.72 177.00 -4,983.81 4,904.03 0.29 933.61 52.70 913.28 Pass - Major Risk 11,637.12 8,779.48 11,925.00 8,897.33 1.75 14.59 155.68 -4,389.98 5,018.96 0.29 364.09 51.34 347.76 Pass - Major Risk 11,640.00 8,782.08 11,950.00 8,908.73 1.75 14.59 156.03 -4,411.71 5,023.70 0.29 388.58 51.36 372.39 Pass - Major Risk 11,640.00 8,782.08 11,975.00 8,920.37 1.75 14.60 156.58 -4,433.66 5,026.44 0.29 412.72 51.43 396.69 Pass - Major Risk 11,640.00 8,782.08 12,000.00 8,931.18 1.75 14.60 157.32 -4,456.16 5,027.41 0.29 436.61 51.50 420.84 Pass - Major Risk 11,640.00 8,782.08 12,025.00 8,939.61 1.75 14.60 158.21 -4,479.69 5,027.68 0.29 460.49 51.57 445.08 Pass - Major Risk 11,640.00 8,782.08 12,050.00 8,946.48 1.75 14.61 159.20 -4,503.70 5,026.81 0.29 484.08 51.63 469.14 Pass - Major Risk 11,640.00 8,782.08 12,075.00 8,952.11 1.75 14.61 160.28 -4,527.95 5,024.55 0.29 507.22 51.69 492.91 Pass - Major Risk 11,640.00 8,782.08 12,100.00 8,956.19 1.75 14.62 161.47 -4,552.32 5,020.84 0.29 529.79 51.75 516.30 Pass - Major Risk 11,640.00 8,782.08 12,125.00 8,959.04 1.75 14.62 162.76 -4,576.55 5,015.39 0.29 551.63 51.80 539.24 Pass - Major Risk 11,640.00 8,782.08 12,150.00 8,961.26 1.75 14.63 164.08 -4,600.48 5,008.54 0.29 572.98 51.85 562.07 Pass - Major Risk 11,640.00 8,782.08 12,175.00 8,963.11 1.75 14.63 165.40 -4,624.15 5,000.71 0.29 594.07 51.89 585.28 Pass - Major Risk 11,640.00 8,782.08 12,200.00 8,964.51 1.75 14.63 166.66 -4,647.77 4,992.63 0.29 615.23 51.94 608.49 Pass - Major Risk 11,640.00 8,782.08 12,225.00 8,965.48 1.75 14.64 167.77 -4,671.75 4,985.65 0.29 637.05 51.98 627.74 Pass - Major Risk 11,640.00 8,782.08 12,250.00 8,966.08 1.75 14.64 168.72 -4,696.08 4,979.95 0.29 659.50 52.03 648.87 Pass - Major Risk 11,640.00 8,782.08 12,275.00 8,966.50 1.75 14.65 169.50 -4,720.73 4,975.81 0.29 682.57 52.08 671.23 Pass - Major Risk 11,640.00 8,782.08 12,300.00 8,966.57 1.75 14.65 170.16 -4,745.54 4,972.72 0.29 705.95 52.14 693.41 Pass - Major Risk 11,640.00 8,782.08 12,325.00 8,966.17 1.75 14.66 170.77 -4,770.39 4,970.06 0.29 729.41 52.21 715.98 Pass - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 6 of 14 COMPASS 2003.16 Build 71 . M.. • • Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Offset Design PB C Pad - C -12 - C -12A - C -12A Offset Site Error: 0.00ft Survey Program: 100 - BOSS -GYRO, 11662- MWD,11882 -MWD Rule Assigned: Major Risk Offset Well Error: 0.00ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +N/S +E/ -W Hole Size Centre Distance Deviation (ft) (ft) (ft) (ft) (ft) (ft) (°) (ft) (ft) (ft) (ft) (ft) (ft) 11,640.00 8,782.08 12,350.00 8,965.86 1.75 14.67 171.35 -4,795.21 4,967.10 0.29 752.93 52.27 738.71 Pass - Major Risk 11,640.00 8,782.08 12,375.00 8,965.50 1.75 14.67 171.97 - 4,819.89 4,963.12 0.29 776.29 52.32 761.28 Pass - Major Risk 11,640.00 8,782.08 12,400.00 8,964.92 1.75 14.68 172.64 -4,844.31 4,957.81 0.29 799.34 52.38 783.52 Pass - Major Risk 11,640.00 8,782.08 12,575.00 8,970.04 1.75 14.73 177.74 - 5,005.62 4,891.97 0.29 955.30 52.67 934.09 Pass - Major Risk 11,640.00 8,782.08 12,600.00 8,971.37 1.75 14.73 178.51 - 5,027.00 4,879.09 0.29 976.61 52.70 954.68 Pass - Major Risk 11,640.00 8,782.08 12,625.00 8,971.80 1.75 14.74 179.30 - 5,047.88 4,865.35 0.29 997.44 52.74 974.77 Pass - Major Risk 11,640.00 8,782.08 12,650.00 8,971.44 1.75 14.74 - 179.88 - 5,068.25 4,850.87 0.29 1,017.85 52.77 994.44 Pass - Major Risk 11,640.00 8,782.08 12,675.00 8,970.74 1.75 14.75 - 179.07 - 5,088.30 4,835.94 0.29 1,038.10 52.80 1,013.96 Pass - Major Risk 11,640.00 8,782.08 12,700.00 8,969.89 1.75 14.76 - 178.21 - 5,107.19 4,819.61 0.29 1,057.49 52.83 1,032.60 Pass - Major Risk 11,640.00 8,782.08 12,725.00 8,969.07 1.75 14.76 - 177.32 - 5,124.78 4,801.87 0.29 1,075.95 52.85 1,050.30 Pass - Major Risk 11,640.00 8,782.08 12,750.00 8,968.45 1.75 14.77 - 176.45 - 5,142.03 4,783.78 0.29 1,094.41 52.88 1,068.02 Pass - Major Risk 11,640.00 8,782.08 12,775.00 8,968.12 1.75 14.77 - 175.58 - 5,158.73 4,765.18 0.29 1,112.68 52.91 1,085.57 Pass - Major Risk 11,640.00 8,782.08 12,800.00 8,968.20 1.75 14.77 - 174.70 - 5,174.15 4,745.52 0.29 1,130.18 52.95 1,102.35 Pass - Major Risk 11,648.20 8,789.41 12,825.00 8,968.63 1.75 14.78 - 173.83 - 5,188.38 4,724.97 0.29 1,146.89 52.79 1,118.09 Pass - Major Risk 11,650.81 8,791.71 12,850.00 8,969.40 1.75 14.78 - 172.95 - 5,201.66 4,703.80 0.29 1,163.15 52.76 1,133.58 Pass - Major Risk 11,653.64 8,794.20 12,875.00 8,970.34 1.75 14.78 - 172.09 - 5,214.58 4,682.42 0.29 1,179.41 52.73 1,149.10 Pass - Major Risk 11,660.00 8,799.71 12,900.00 8,970.38 1.75 14.79 - 171.24 - 5,227.40 4,660.96 0.29 1,195.76 52.60 1,164.60 Pass - Major Risk 11,660.00 8,799.71 12,925.00 8,970.09 1.75 14.79 - 170.40 - 5,240.05 4,639.40 0.29 1,212.17 52.64 1,180.41 Pass - Major Risk 11,660.00 8,799.71 12,950.00 8,969.91 1.75 14.79 - 169.58 - 5,252.39 4,617.66 0.29 1,228.61 52.69 1,196.27 Pass - Major Risk 11,660.00 8,799.71 12,975.00 8,969.31 1.75 14.79 - 168.74 - 5,263.44 4,595.25 0.29 1,244.21 52.73 1,211.28 Pass - Major Risk 11,668.50 8,806.93 13,000.00 8,968.19 1.75 14.79 - 167.88 - 5,272.68 4,572.05 0.29 1,258.42 52.54 1,224.65 Pass - Major Risk 11,672.41 8,810.20 13,025.00 8,966.69 1.75 14.79 - 166.99 - 5,279.80 4,548.14 0.29 1,271.07 52.48 1,236.61 Pass - Major Risk 11,680.00 8,816.44 13,050.00 8,965.16 1.75 14.79 - 166.10 -5,285.52 4,523.86 0.29 1,282.83 52.31 1,247.58 Pass - Major Risk 11,680.00 8,816.44 13,075.00 8,964.32 1.75 14.79 - 165.24 - 5,289.99 4,499.28 0.29 1,293.89 52.38 1,258.10 Pass - Major Risk 11,688.13 8,822.96 13,100.00 8,964.18 1.75 14.79 - 164.40 - 5,293.21 4,474.49 0.29 1,304.25 52.19 1,267.73 Pass - Major Risk 11,695.01 8,828.35 13,125.00 8,964.33 1.75 14.79 - 163.58 - 5,295.15 4,449.57 0.29 1,313.80 52.03 1,276.63 Pass - Major Risk 11,700.00 8,832.16 13,150.00 8,964.54 1.75 14.78 - 162.78 - 5,296.20 4,424.59 0.29 1,322.88 51.94 1,285.13 Pass - Major Risk 11,700.00 8,832.16 13,155.00 8,964.58 1.75 14.78 - 162.63 - 5,296.40 4,419.60 0.29 1,324.73 51.96 1,286.90 Pass - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 7 of 14 COMPASS 2003.16 Build 71 MU • • RA MIS Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Weilbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Offset Design PB C Pad - C -12 - C- 12APB1 - C- 12APB1 Offset Site Error. 0.00 ft Survey Program: 100 - BOSS -GYRO, 11662 -MW D Rule Assigned: Major Risk Offset Well Error: 0.00 ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +N /S +E/ -W Hole Size Centre Distance Deviation (ft NO ON (fl) ON (ft) r) (ft) (ft) (ft) (ft) (ft) (ft) 11,300.00 8,477.99 11,300.00 8,477.99 0.00 0.00 157.61 - 3,970.96 4,878.69 0.29 0.00 0.29 -0.29 FAIL - Major Risk, CC 11,325.00 8,497.39 11,325.00 8,497.39 0.55 1.08 -16.19 - 3,985.53 4,884.68 0.29 0.00 5.42 -1.20 FAIL - Major Risk 11,350.00 8,516.87 11,350.00 8,516.87 1.09 2.15 -16.18 - 4,000.04 4,890.64 0.29 0.00 10.54 -2.09 FAIL - Major Risk 11,375.00 8,536.41 11,375.00 8,536.41 1.64 3.23 -16.17 - 4,014.47 4,896.54 0.29 0.00 15.66 -3.00 FAIL - Major Risk 11,399.99 8,556.18 11,400.00 8,556.02 1.75 4.30 158.59 -4,028.82 4,902.41 0.29 0.28 19.53 -4.42 FAIL - Major Risk 11,424.79 8,576.84 11,425.00 8,575.69 1.75 5.35 157.88 -4,043.11 4,908.25 0.29 2.28 23.11 -5.42 FAIL - Major Risk, ES, SF 11,448.90 8,598.24 11,450.00 8,595.41 1.75 6.39 157.64 - 4,057.32 4,914.08 0.29 6.85 26.75 -3.67 FAIL - Major Risk 11,471.88 8,619.61 11,475.00 8,615.19 1.75 7.44 157.54 - 4,071.46 4,919.90 0.29 13.82 30.38 0.65 Pass - Major Risk 11,493.55 8,640.42 11,500.00 8,635.02 1.75 8.48 157.29 - 4,085.52 4,925.71 0.29 22.98 33.66 7.36 Pass - Major Risk 11,513.83 8,660.28 11,525.00 8,654.91 1.75 9.50 155.90 - 4,099.51 4,931.51 0.29 33.91 36.92 16.01 Pass - Major Risk 11,532.77 8,678.96 11,550.00 8,674.87 1.75 10.51 154.13 - 4,113.42 4,937.28 0.29 46.38 40.54 26.46 Pass - Major Risk 11,549.96 8,695.93 11,575.00 8,694.90 1.75 11.53 152.38 - 4,127.24 4,943.02 0.29 60.21 43.92 38.49 Pass - Major Risk 11,565.39 8,711.13 11,600.00 8,714.99 1.75 12.54 151.00 -4,140.98 4,948.74 0.29 75.37 47.14 52.03 Pass - Major Risk 11,580.00 8,725.42 11,625.00 8,735.14 1.75 13.53 150.00 - 4,154.64 4,954.41 0.29 91.68 50.08 66.87 Pass - Major Risk 11,591.74 8,736.81 11,650.00 8,755.27 1.75 14.35 149.31 - 4,168.35 4,960.06 0.29 109.09 51.37 87.42 Pass - Major Risk 11,602.00 8,746.68 11,675.00 8,774.40 1.75 14.58 149.15 - 4,183.35 4,965.87 0.29 128.39 51.14 111.85 Pass - Major Risk 11,610.89 8,755.15 11,700.00 8,792.43 1.75 14.58 149.22 - 4,199.54 4,972.00 0.29 149.22 51.12 132.59 Pass - Major Risk 11,620.00 8,763.71 11,725.00 8,809.44 1.75 14.58 149.44 - 4,216.70 4,978.41 0.29 171.21 51.09 154.48 Pass - Major Risk 11,623.35 8,766.83 11,750.00 8,824.82 1.75 14.58 149.74 - 4,235.19 4,985.17 0.29 194.28 51.09 177.49 Pass - Major Risk 11,627.24 8,770.44 11,775.00 8,838.33 1.75 14.58 150.45 - 4,255.28 4,991.35 0.29 218.07 51.10 201.21 Pass - Major Risk 11,632.00 8,774.81 11,800.00 8,850.02 1.75 14.58 151.52 - 4,276.78 4,996.44 0.29 242.16 51.08 225.27 Pass - Major Risk 11,632.00 8,774.81 11,825.00 8,860.17 1.75 14.58 152.72 - 4,299.28 5,000.36 0.29 266.23 51.15 249.38 Pass - Major Risk 11,632.00 8,774.81 11,850.00 8,869.00 1.75 14.59 154.05 - 4,322.51 5,003.07 0.29 290.19 51.22 273.48 Pass - Major Risk 11,635.03 8,777.58 11,875.00 8,877.53 1.75 14.59 155.45 - 4,345.97 5,004.25 0.29 313.86 51.21 297.44 Pass - Major Risk 11,636.96 8,779.33 11,900.00 8,886.48 1.75 14.59 156.84 - 4,369.31 5,003.93 0.29 337.24 51.23 321.24 Pass - Major Risk 11,640.00 8,782.08 11,925.00 8,896.14 1.75 14.59 158.16 - 4,392.31 5,002.35 0.29 360.35 51.23 344.92 Pass - Major Risk 11,640.00 8,782.08 11,950.00 8,906.46 1.75 14.60 159.41 - 4,414.92 4,999.72 0.29 383.24 51.28 368.41 Pass - Major Risk 11,640.00 8,782.08 11,975.00 8,916.89 1.75 14.60 160.42 - 4,437.56 4,997.79 0.29 406.61 51.34 392.39 Pass - Major Risk 11,640.00 8,782.08 12,075.00 8,941.23 1.75 14.62 163.67 - 4,534.09 4,997.14 0.29 502.82 51.62 491.38 Pass - Major Risk 11,640.00 8,782.08 12,100.00 8,944.40 1.75 14.62 164.50 - 4,558.87 4,996.13 0.29 526.58 51.69 516.23 Pass - Major Risk 11,640.00 8,782.08 12,125.00 8,946.94 1.75 14.63 165.40 - 4,583.62 4,993.79 0.29 550.01 51.76 541.21 Pass - Major Risk 11,640.00 8,782.08 12,150.00 8,949.33 1.75 14.63 166.35 - 4,608.24 4,990.16 0.29 573.16 51.81 567.61 Pass - Major Risk 11,640.00 8,782.08 12,175.00 8,951.90 1.75 14.64 167.31 - 4,632.65 4,985.44 0.29 596.15 51.87 587.69 Pass - Major Risk 11,640.00 8,782.08 12,200.00 8,954.78 1.75 14.64 168.23 - 4,656.92 4,980.18 0.29 619.17 51.92 609.17 Pass - Major Risk 11,640.00 8,782.08 12,225.00 8,957.23 1.75 14.65 169.17 - 4,681.01 4,973.95 0.29 641.91 51.97 630.83 Pass - Major Risk 11,640.00 8,782.08 12,250.00 8,959.06 1.75 14.65 170.15 - 4,704.82 4,966.56 0.29 664.26 52.02 651.75 Pass - Major Risk 11,640.00 8,782.08 12,275.00 8,960.29 1.75 14.66 171.18 - 4,728.22 4,957.87 0.29 686.12 52.06 672.13 Pass - Major Risk 11,640.00 8,782.08 12,300.00 8,961.49 1.75 14.66 172.22 - 4,751.19 4,948.09 0.29 707.67 52.10 692.35 Pass - Major Risk 11,640.00 8,782.08 12,325.00 8,963.07 1.75 14.67 173.25 - 4,773.73 4,937.39 0.29 729.06 52.14 712.52 Pass - Major Risk 11,640.00 8,782.08 12,350.00 8,964.26 1.75 14.67 174.31 - 4,795.67 4,925.47 0.29 749.94 52.17 732.22 Pass - Major Risk 11,640.00 8,782.08 12,375.00 8,964.51 1.75 14.68 175.43 - 4,816.86 4,912.23 0.29 770.08 52.20 751.18 Pass - Major Risk 11,640.00 8,782.08 12,400.00 8,963.12 1.75 14.68 176.61 - 4,837.13 4,897.67 0.29 789.21 52.23 769.11 Pass - Major Risk 11,640.00 8,782.08 12,425.00 8,960.45 1.75 14.69 177.83 - 4,856.48 4,882.08 0.29 807.49 52.25 786.20 Pass - Major Risk 11,640.00 8,782.08 12,450.00 8,957.02 1.75 14.69 179.08 - 4,874.92 4,865.55 0.29 825.10 52.27 802.64 Pass - Major Risk 11,646.17 8,787.61 12,475.00 8,953.36 1.75 14.70 - 179.69 - 4,892.58 4,848.24 0.29 842.26 52.16 818.41 Pass - Major Risk 11,646.39 8,787.80 12,000.00 8,926.06 1.75 14.60 161.28 - 4,460.79 4,996.77 0.29 430.39 51.26 417.02 Pass - Major Risk 11,646.54 8,787.94 12,500.00 8,950.09 1.75 14.70 - 178.48 - 4,909.88 4,830.50 0.29 859.61 52.17 834.69 Pass - Major Risk 11,646.61 8,788.00 12,050.00 8,937.65 1.75 14.61 162.87 -4,509.35 4,996.99 0.29 478.71 51.40 466.78 Pass - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 8 of 14 COMPASS 2003.16 Build 71 v1:Iu • • BA AMIES Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Welibore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Offset Design PB C Pad - C -12 - C- 12APB1 - C- 12APB1 Offset site Error: 0.00ft Survey Program: 100- BOSS -GYRO, 11662 -MWD Rule Assigned: Major Risk Offset Well Error: 0.00ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Welibore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +141.5 +E/ -W Hole Size Centre Distance Deviation (ft) (ft) (ft) (ft) (ft) (ft) ( °) (ft) (ft) (ft) (ft) (ft) (ft) 11,646.98 8,788.33 12,025.00 8,932.94 1.75 14.61 162.10 - 4,484.81 4,996.59 0.29 454.54 51.31 441.88 Pass - Major Risk 11,647.06 8,788.40 12,525.00 8,947.39 1.75 14.70 - 177.35 - 4,927.54 4,813.00 0.29 877.75 52.18 851.84 Pass - Major Risk 11,647.65 8,788.92 12,550.00 8,945.30 1.75 14.71 - 176.32 - 4,945.92 4,796.19 0.29 896.97 52.19 870.19 Pass - Major Risk 11,648.27 8,789.47 12,575.00 8,943.68 1.75 14.71 - 175.38 - 4,964.82 4,779.91 0.29 917.00 52.20 889.43 Pass - Major Risk 11,648.97 8,790.09 12,600.00 8,942.43 1.75 14.71 - 174.51 - 4,984.03 4,763.97 0.29 937.58 52.20 909.29 Pass - Major Risk 11,649.60 8,790.64 12,621.00 8,941.53 1.75 14.72 - 173.82 - 5,000.25 4,750.66 0.29 955.13 52.21 926.27 Pass - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 9 of 14 COMPASS 2003.16 Build 71 • . r. • • Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay ND Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset ND Reference: Offset Datum Offset Design PB C Pad - C -31 - C-31B - C-31B Offset Site Error: 0.00ft Survey Program: 51-GCT-MS, 10136-MWD, 12116-MWD Rule Assigned: Major Risk Offset Well Error: 0.00 ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Tooiface+ Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +NI-S +E/ -W Hole Size Centre Distance Deviation (ff) (ft) (ft) (ft) (ft) (ft) C) (ft) (ft) (ft) (ft) (ft) (ft) 11,560.00 8,705.83 12,750.00 8,949.84 377.94 43.36 69.23 - 3,552.69 6,288.57 0.29 1,490.91 1,273.83 387.68 Pass - Major Risk 11,560.00 8,705.83 12,775.00 8,949.82 377.94 43.34 69.19 - 3,560.77 6,264.93 0.29 1,466.28 1,273.80 362.69 Pass - Major Risk 11,560.00 8,705.83 12,800.00 8,949.75 377.94 43.33 69.26 - 3,571.19 6,242.20 0.29 1,441.68 1,273.77 338.74 Pass - Major Risk 11,560.00 8,705.83 12,825.00 8,949.56 377.94 43.31 69.30 - 3,580.95 6,219.19 0.29 1,417.03 1,273.74 314.47 Pass - Major Risk 11,560.00 8,705.83 12,850.00 8,950.01 377.94 43.29 69.30 - 3,589.78 6,195.81 0.29 1,392.50 1,273.71 289.91 Pass - Major Risk 11,560.00 8,705.83 12,875.00 8,950.91 377.94 43.28 69.25 - 3,597.53 6,172.06 0.29 1,368.10 1,273.67 265.00 Pass - Major Risk 11,560.00 8,705.83 12,900.00 8,951.51 377.94 43.28 69.14 - 3,603.74 6,147.86 0.29 1,343.79 1,273.65 239.47 Pass - Major Risk 11,560.00 8,705.83 12,925.00 8,951.10 377.94 43.28 68.92 - 3,607.77 6,123.20 0.29 1,319.67 1,273.62 213.12 Pass - Major Risk 11,564.48 8,710.23 12,950.00 8,950.74 377.94 43.28 68.70 - 3,609.71 6,098.29 0.29 1,296.08 1,274.09 188.12 Pass - Major Risk 11,565.81 8,711.54 12,975.00 8,950.52 377.94 43.29 68.31 - 3,609.43 6,073.30 0.29 1,273.32 1,274.19 161.65 Pass - Major Risk 11,567.14 8,712.85 13,000.00 8,950.24 377.94 43.30 67.80 - 3,606.61 6,048.47 0.29 1,251.73 1,274.37 135.17 Pass - Major Risk 11,572.00 8,717.61 13,025.00 8,950.20 377.94 43.32 67.25 - 3,601.63 6,023.98 0.29 1,231.44 1,274.90 110.27 Pass - Major Risk 11,572.00 8,717.61 13,050.00 8,950.39 377.94 43.35 66.51 - 3,594.58 6,000.00 0.29 1,212.64 1,274.94 84.27 Pass - Major Risk 11,572.00 8,717.61 13,075.00 8,950.50 377.94 43.38 65.67 - 3,585.20 5,976.84 0.29 1,195.72 1,274.99 59.27 Pass - Major Risk 11,572.00 8,717.61 13,100.00 8,950.68 377.94 43.41 64.72 - 3,573.66 5,954.68 0.29 1,180.90 1,275.05 35.67 Pass - Major Risk 11,576.11 8,721.63 13,125.00 8,950.97 377.94 43.45 63.79 - 3,560.36 5,933.51 0.29 1,168.09 1,276.06 14.30 Pass - Major Risk 11,580.00 8,725.42 13,150.00 8,951.33 377.94 43.48 62.80 - 3,545.75 5,913.24 0.29 1,157.06 1,277.03 -5.68 FAIL - Major Risk 11,580.00 8,725.42 13,175.00 8,951.51 377.94 43.52 61.66 - 3,529.50 5,894.25 0.29 1,148.29 1,277.12 -24.16 FAIL - Major Risk 11,580.00 8,725.42 13,200.00 8,951.43 377.94 43.56 60.47 - 3,512.28 5,876.13 0.29 1,141.17 1,277.22 -40.93 FAIL - Major Risk 11,586.96 8,732.18 13,225.00 8,951.15 377.94 43.61 59.47 - 3,496.28 5,856.93 0.29 1,132.97 1,278.83 -57.68 FAIL - Major Risk 11,590.40 8,735.52 13,250.00 8,950.51 377.94 43.66 58.40 - 3,482.02 5,836.42 0.29 1,123.17 1,279.69 -75.91 FAIL - Major Risk 11,594.74 8,739.71 13,275.00 8,950.16 377.94 43.72 57.39 - 3,469.19 5,814.97 0.29 1,112.34 1,280.73 -94.69 FAIL - Major Risk 11,602.00 8,746.68 13,300.00 8,950.57 377.94 43.78 56.46 - 3,457.55 5,792.85 0.29 1,100.89 1,282.29 - 113.59 FAIL - Major Risk 11,602.00 8,746.68 13,325.00 8,951.00 377.94 43.85 55.41 - 3,447.82 5,769.84 0.29 1,088.05 1,282.47 - 133.53 FAIL - Major Risk 11,610.10 8,754.39 13,350.00 8,951.27 377.94 43.92 54.56 - 3,439.98 5,746.11 0.29 1,073.88 1,283.50 - 153.42 FAIL - Major Risk 11,615.25 8,759.26 13,375.00 8,951.38 377.94 43.99 53.69 - 3,433.96 5,721.85 0.29 1,058.54 1,284.20 - 174.36 FAIL - Major Risk 11,620.00 8,763.71 13,400.00 8,951.40 377.94 44.07 52.85 - 3,429.41 5,697.27 0.29 1,042.35 1,284.91 - 195.80 FAIL - Major Risk 11,627.07 8,770.28 13,425.00 8,951.47 377.94 44.15 52.11 - 3,426.66 5,672.43 0.29 1,025.15 1,285.78 - 217.65 FAIL - Major Risk 11,632.00 8,774.81 13,450.00 8,951.32 377.94 44.24 51.38 - 3,425.74 5,647.45 0.29 1,006.90 1,286.44 - 240.23 FAIL - Major Risk 11,635.65 8,778.14 13,475.00 8,950.47 377.94 44.32 50.60 - 3,426.46 5,622.48 0.29 987.73 1,286.27 - 262.74 FAIL - Major Risk 11,640.00 8,782.08 13,500.00 8,949.34 377.94 44.41 49.82 - 3,428.24 5,597.57 0.29 968.09 1,286.01 - 285.30 FAIL - Major Risk 11,640.00 8,782.08 13,525.00 8,948.18 377.94 44.50 49.05 - 3,430.63 5,572.71 0.29 948.29 1,286.21 - 308.86 FAIL - Major Risk 11,640.00 8,782.08 13,550.00 8,947.55 377.94 44.60 48.21 - 3,431.87 5,547.76 0.29 929.57 1,286.42 - 331.46 FAIL - Major Risk 11,649.41 8,790.48 13,575.00 8,947.53 377.94 44.70 47.29 - 3,431.18 5,522.77 0.29 912.46 1,285.68 - 350.50 FAIL - Major Risk 11,654.22 8,794.70 13,600.00 8,947.87 377.94 44.82 46.26 - 3,428.30 5,497.95 0.29 897.43 1,285.45 - 368.68 FAIL - Major Risk 11,660.00 8,799.71 13,625.00 8,948.45 377.94 44.93 45.13 - 3,422.92 5,473.56 0.29 884.93 1,285.13 - 384.22 FAIL - Major Risk 11,665.67 8,804.55 13,650.00 8,949.17 377.94 45.06 43.94 - 3,415.91 5,449.57 0.29 874.38 1,284.84 - 397.71 FAIL - Major Risk 11,672.20 8,810.03 13,675.00 8,949.89 377.94 45.18 42.75 - 3,408.87 5,425.59 0.29 864.34 1,284.43 - 410.15 FAIL - Major Risk 11,680.00 8,816.44 13,688.00 8,950.26 377.94 45.25 42.12 - 3,405.21 5,413.12 0.29 859.35 1,283.72 -415.41 FAIL - Major Risk, CC, ES, S CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 10 of 14 COMPASS 2003.16 Build 71 . ITS MI • • Win Travelling Cylinder Report 0 bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay ND Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig: Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset ND Reference: Offset Datum Offset Design PB C Pad - C -31 - C-31B - Plan #6 Offset Site Error: 0.00 ft Survey Program: 51- GCT- MS, 10136 -MWD, 12024 -MWD Rule Assigned: Major Risk Offset Well Error. 0.00 ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +NI-S +E/ -W Hole Size Centre Distance Deviation (ft) (ft) (a) (ft) (ft) (ft) (% (ft) (ft) (ft) (ft) (ft) (ft) 11,560.00 8,705.83 12,700.00 8,960.09 377.94 43.28 69.84 - 3,572.49 6,281.26 0.29 1,479.05 1,273.65 383.02 Pass - Major Risk 11,560.00 8,705.83 12,725.00 8,960.09 377.94 43.26 69.66 - 3,576.61 6,256.60 0.29 1,454.87 1,273.39 356.98 Pass - Major Risk 11,560.00 8,705.83 12,750.00 8,960.09 377.94 43.24 69.42 - 3,579.43 6,231.77 0.29 1,430.99 1,273.12 330.62 Pass - Major Risk 11,560.00 8,705.83 12,775.00 8,960.09 377.94 43.23 69.12 - 3,580.95 6,206.82 0.29 1,407.51 1,272.85 304.07 Pass - Major Risk 11,560.00 8,705.83 12,800.00 8,960.09 377.94 43.22 68.76 - 3,581.16 6,181.82 0.29 1,384.50 1,272.66 277.40 Pass - Major Risk 11,560.00 8,705.83 12,825.00 8,960.09 377.94 43.21 68.34 - 3,580.06 6,156.85 0.29 1,362.06 1,272.63 250.71 Pass - Major Risk 11,564.96 8,710.71 12,850.00 8,960.09 377.94 43.21 67.96 - 3,577.66 6,131.96 0.29 1,340.24 1,273.11 225.99 Pass - Major Risk 11,566.31 8,712.03 12,875.00 8,960.09 377.94 43.22 67.44 - 3,573.96 6,107.24 0.29 1,319.19 1,273.28 200.01 Pass - Major Risk 11,567.70 8,713.39 12,900.00 8,960.09 377.94 43.23 66.85 - 3,568.97 6,082.75 0.29 1,298.98 1,273.40 174.31 Pass - Major Risk 11,572.00 8,717.61 12,925.00 8,960.09 377.94 43.24 66.26 - 3,562.70 6,058.55 0.29 1,279.72 1,273.89 149.98 Pass - Major Risk 11,572.00 8,717.61 12,950.00 8,960.09 377.94 43.26 65.52 - 3,555.18 6,034.71 0.29 1,261.47 1,273.91 124.72 Pass - Major Risk 11,572.00 8,717.61 12,975.00 8,960.09 377.94 43.28 64.71 - 3,546.42 6,011.30 0.29 1,244.37 1,273.95 100.15 Pass - Major Risk 11,574.60 8,720.15 13,000.00 8,960.09 377.94 43.30 63.93 - 3,537.38 5,987.99 0.29 1,227.74 1,274.59 76.39 Pass - Major Risk 11,577.21 8,722.70 13,025.00 8,960.09 377.94 43.33 63.17 - 3,529.56 5,964.25 0.29 1,210.46 1,275.23 52.28 Pass - Major Risk 11,580.00 8,725.42 13,050.00 8,960.09 377.94 43.36 62.44 - 3,522.99 5,940.13 0.29 1,192.54 1,275.95 27.89 Pass - Major Risk 11,580.00 8,725.42 13,075.00 8,960.09 377.94 43.40 61.68 - 3,517.69 5,915.70 0.29 1,174.00 1,276.03 2.86 Pass - Major Risk 11,586.91 8,732.13 13,100.00 8,960.09 377.94 43.44 61.10 - 3,513.68 5,891.03 0.29 1,154.84 1,277.59 -21.62 FAIL - Major Risk 11,590.80 8,735.91 13,125.00 8,960.09 377.94 43.48 60.49 - 3,510.96 5,866.18 0.29 1,135.09 1,278.48 -46.73 FAIL - Major Risk 11,595.06 8,740.01 13,150.00 8,960.09 377.94 43.53 59.88 - 3,508.54 5,841.30 0.29 1,115.37 1,279.46 -71.77 FAIL - Major Risk 11,602.00 8,746.68 13,175.00 8,960.09 377.94 43.59 59.25 - 3,504.84 5,816.58 0.29 1,096.62 1,280.91 -96.16 FAIL - Major Risk 11,602.00 8,746.68 13,200.00 8,960.09 377.94 43.66 58.40 - 3,499.85 5,792.09 0.29 1,078.98 1,281.05 - 120.32 FAIL - Major Risk 11,608.00 8,752.40 13,225.00 8,960.09 377.94 43.72 57.59 - 3,493.58 5,767.89 0.29 1,062.53 1,281.84 - 142.78 FAIL - Major Risk 11,612.34 8,756.51 13,250.00 8,960.09 377.94 43.80 56.69 - 3,486.06 5,744.05 0.29 1,047.39 1,282.41 - 164.50 FAIL - Major Risk 11,620.00 8,763.71 13,275.00 8,960.09 377.94 43.87 55.78 - 3,477.30 5,720.64 0.29 1,033.65 1,283.38 - 184.74 FAIL - Major Risk 11,622.52 8,766.06 13,300.00 8,960.09 377.94 43.95 54.72 - 3,467.33 5,697.72 0.29 1,021.39 1,283.80 - 204.14 FAIL - Major Risk 11,628.54 8,771.64 13,325.00 8,960.09 377.94 44.03 53.67 - 3,456.17 5,675.35 0.29 1,010.70 1,284.59 - 221.72 FAIL - Major Risk 11,632.00 8,774.81 13,350.00 8,960.09 377.94 44.11 52.54 - 3,443.85 5,653.60 0.29 1,001.65 1,285.14 - 237.76 FAIL - Major Risk 11,637.14 8,779.50 13,375.00 8,960.09 377.94 44.20 51.30 - 3,430.41 5,632.52 0.29 994.33 1,284.86 - 250.78 FAIL - Major Risk 11,640.00 8,782.08 13,400.00 8,960.09 377.94 44.28 50.05 - 3,416.73 5,611.60 0.29 987.83 1,284.82 - 263.19 FAIL - Major Risk 11,640.00 8,782.08 13,425.00 8,960.09 377.94 44.37 48.80 - 3,404.14 5,590.00 0.29 980.69 1,285.09 - 276.40 FAIL - Major Risk 11,649.38 8,790.45 13,450.00 8,960.09 377.94 44.47 47.59 - 3,392.70 5,567.78 0.29 972.78 1,284.39 - 287.64 FAIL - Major Risk 11,660.00 8,799.71 13,475.00 8,960.09 377.94 44.57 46.39 - 3,382.44 5,544.98 0.29 964.26 1,283.57 - 298.83 FAIL - Major Risk 11,660.00 8,799.71 13,500.00 8,960.09 377.94 44.68 45.23 - 3,373.38 5,521.68 0.29 954.95 1,283.88 - 312.65 FAIL - Major Risk 11,660.00 8,799.71 13,525.00 8,960.09 377.94 44.79 44.07 - 3,365.56 5,497.94 0.29 945.01 1,284.20 - 326.60 FAIL - Major Risk 11,670.58 8,808.68 13,550.00 8,960.09 377.94 44.90 42.96 - 3,358.99 5,473.82 0.29 934.31 1,283.34 - 338.67 FAIL - Major Risk 11,680.00 8,816.44 13,575.00 8,960.09 377.94 45.02 41.87 - 3,353.69 5,449.39 0.29 922.95 1,282.59 - 351.31 FAIL - Major Risk 11,680.00 8,816.44 13,600.00 8,960.09 377.94 45.14 40.82 - 3,349.68 5,424.72 0.29 910.87 1,282.93 - 366.10 FAIL - Major Risk 11,690.84 8,825.10 13,625.00 8,960.09 377.94 45.26 39.81 - 3,346.97 5,399.87 0.29 898.07 1,282.04 - 379.24 FAIL - Major Risk 11,700.00 8,832.16 13,650.00 8,960.09 377.94 45.39 38.81 - 3,344.54 5,374.99 0.29 885.42 1,281.30 - 392.34 FAIL - Major Risk I, 11,707.26 8,837.59 13,675.00 8,960.09 377.94 45.53 37.77 - 3,340.84 5,350.27 0.29 874.30 1,280.83 - 404.12 FAIL - Major Risk 11,720.00 8,846.74 13,700.00 8,960.09 377.94 45.67 36.72 - 3,335.85 5,325.78 0.29 864.78 1,279.78 - 413.27 FAIL - Major Risk 11,727.35 8,851.79 13,725.00 8,960.09 377.94 45.81 35.67 - 3,329.59 5,301.58 0.29 856.90 1,279.34 - 421.49 FAIL - Major Risk 11,740.00 8,860.08 13,750.00 8,960.09 377.94 45.96 34.63 - 3,322.06 5,277.74 0.29 850.71 1,278.41 - 427.11 FAIL - Major Risk 11,751.74 8,867.28 13,775.00 8,960.09 377.94 46.11 33.63 - 3,313.30 5,254.33 0.29 846.21 1,277.57 -431.09 FAIL - Major Risk 11,765.70 8,875.22 13,800.00 8,960.09 377.94 46.26 32.68 - 3,303.33 5,231.41 0.29 843.40 1,276.64 -433.08 FAIL - Major Risk 11,780.00 8,882.61 13,825.00 8,960.09 377.94 46.41 31.81 - 3,292.17 5,209.04 0.29 842.26 1,275.73 -433.40 FAIL - Major Risk, CC, ES, S 11,792.00 8,888.21 13,840.00 8,960.09 377.94 46.49 31.33 - 3,284.92 5,195.91 0.29 842.37 1,274.97 -432.51 FAIL - Major Risk CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 11 of 14 COMPASS 2003.16 Build 71 IMIll • S Travelling Cylinder Report 0 bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig; Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Offset Design PB C Pad - C -32 - C -32C - C -32C Offset Site Error. 0.00ft Survey Program: 102 -BOSS -GYRO, 9247-MWD+IFR+MS, 10109 -MWD Rule Assigned: Major Risk Offset Well Error: 0.00ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +N /-S +E/-W Hole Size Centre Distance Deviation (ft) (ft) (ft) (ft) (ft) (f) (°) (ft) (f 1 (R) (ft) (ft) (n) 12,700.00 8,967.01 10,625.00 8,959.52 378.27 176.02 28.83 - 2,251.15 4,773.88 0.29 1,479.33 1,658.86 - 168.56 FAIL - Major Risk 12,700.00 8,967.01 10,650.00 8,957.83 378.27 176.02 28.77 - 2,260.13 4,750.61 0.29 1,460.38 1,658.78 - 187.50 FAIL - Major Risk 12,710.65 8,966.97 10,675.00 8,956.44 378.28 176.03 27.43 - 2,269.60 4,727.52 0.29 1,441.10 1,657.26 - 205.28 FAIL - Major Risk 12,714.54 8,966.96 10,700.00 8,955.66 378.28 176.03 26.92 - 2,279.73 4,704.68 0.29 1,421.54 1,656.45 - 224.10 FAIL - Major Risk 12,725.00 8,966.92 10,725.00 8,955.47 378.29 176.03 25.65 - 2,289.66 4,681.74 0.29 1,402.30 1,653.89 - 240.82 FAIL - Major Risk 12,725.00 8,966.92 10,750.00 8,955.71 378.29 176.03 25.66 - 2,298.39 4,658.32 0.29 1,383.94 1,653.80 - 259.18 FAIL - Major Risk 12,725.00 8,966.92 10,775.00 8,956.24 378.29 176.04 25.68 - 2,305.50 4,634.36 0.29 1,367.02 1,653.70 - 276.11 FAIL - Major Risk 12,725.00 8,966.92 10,800.00 8,957.00 378.29 176.04 25.71 - 2,311.25 4,610.05 0.29 1,351.43 1,653.60 - 291.71 FAIL - Major Risk 12,738.12 8,966.87 10,825.00 8,957.69 378.30 176.05 24.16 - 2,315.26 4,585.39 0.29 1,337.33 1,649.29 - 301.59 FAIL - Major Risk 12,750.00 8,966.83 10,850.00 8,958.48 378.31 176.06 22.76 - 2,317.54 4,560.51 0.29 1,325.10 1,644.32 - 308.97 FAIL - Major Risk 12,750.00 8,966.83 10,875.00 8,959.53 378.31 176.06 22.80 - 2,318.26 4,535.55 0.29 1,314.42 1,644.21 - 319.67 FAIL - Major Risk 12,750.00 8,966.83 10,900.00 8,960.11 378.31 176.07 22.83 - 2,317.50 4,510.57 0.29 1,305.51 1,644.10 - 328.60 FAIL - Major Risk 12,762.51 8,966.78 10,925.00 8,960.66 378.32 176.09 21.35 - 2,315.32 4,485.67 0.29 1,298.14 1,637.81 - 329.81 FAIL - Major Risk 12,775.00 8,966.74 10,950.00 8,961.40 378.33 176.10 19.88 - 2,311.70 4,460.95 0.29 1,292.62 1,630.43 - 328.11 FAIL - Major Risk 12,775.00 8,966.74 10,975.00 8,961.47 378.33 176.11 19.89 - 2,306.38 4,436.53 0.29 1,289.03 1,630.32 - 331.72 FAIL - Major Risk 12,775.00 8,966.74 11,000.00 8,960.63 378.33 176.12 19.86 - 2,299.51 4,412.51 0.29 1,287.51 1,630.22 - 333.28 FAIL - Major Risk, ES, SF 12,789.25 8,966.68 11,025.00 8,959.88 378.34 176.14 18.11 - 2,291.49 4,388.85 0.29 1,287.39 1,620.51 - 323.83 FAIL - Major Risk 12,800.00 8,966.65 11,050.00 8,959.68 378.34 176.16 16.81 - 2,283.87 4,365.04 0.29 1,287.30 1,612.24 - 315.80 FAIL - Major Risk 12,800,00 8,966.65 11,075.00 8,959.80 378.34 176.17 16.82 - 2,277.60 4,340.85 0.29 1,286.13 1,612.15 - 317.02 FAIL - Major Risk 12,809.52 8,966.61 11,100.00 8,959.61 378.35 176.19 15.67 - 2,272.51 4,316.38 0.29 1,284.10 1,604.15 - 311.21 FAIL - Major Risk 12,825,00 8,966.56 11,125.00 8,959.13 378.36 176.21 13.79 - 2,268.84 4,291.65 0.29 1,281.10 1,589.91 - 300.11 FAIL - Major Risk 12,825,00 8,966.56 11,150.00 8,958.74 378.36 176.23 13.77 - 2,266.47 4,266.77 0.29 1,276.95 1,589.82 - 304.31 FAIL - Major Risk 12,825.00 8,966.56 11,175.00 8,958.61 378.36 176.25 13.77 - 2,265.48 4,241.80 0.29 1,271.90 1,589.74 - 309.42 FAIL - Major Risk 12,836,25 8,966.52 11,200.00 8,958.65 378.37 176.27 12.42 - 2,265.93 4,216.80 0.29 1,265.75 1,578.35 - 304.35 FAIL - Major Risk 12,850.00 8,966.47 11,225.00 8,958.79 378.38 176.29 10.77 - 2,267.72 4,191.87 0.29 1,258.72 1,563.31 - 296.49 FAIL - Major Risk 12,850.00 8,966.47 11,250.00 8,959.00 378.38 176.31 10.78 - 2,270.75 4,167.06 0.29 1,250.69 1,563.24 - 304.58 FAIL - Major Risk 12,850.00 8,966.47 11,275.00 8,959.66 378.38 176.33 10.81 - 2,275.17 4,142.47 0.29 1,241.78 1,563.19 - 313.56 FAIL - Major Risk 12,862.20 8,966.43 11.300.00 8,960.85 378.39 176.35 9.40 - 2,281.00 4,118.19 0.29 1,231.75 1,548.80 - 309.36 FAIL - Major Risk, CC CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11 :23PM Page 12 of 14 COMPASS 2003.16 Build 71 • Milli • • Huang Travelling Cylinder Report 0 bp 1NTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C-12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig: Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Offset Design PB C Pad - C -32 - C -32C - Plan #4 Offset Site Error: 0.005 Survey Program: 102 - BOSS -GYRO, 9247- MWD +IFR +MS, 10108 -MWD Rule Assigned: Major Risk Offset Well Error: 0.00ft Reference Offset Semi Major Axis Measured Vertical Measured Vertical Reference Offset Toolface + Offset Wellbore Centre Casing - Centre to No Go Allowable Warning Depth Depth Depth Depth Azimuth +N /-S +E/ -W Hole Size Centre Distance Deviation (ff) (f) ON (ft) (ft) ( r) (ft) (ft) (ft) (ft) (ft) (ft) 12,700.00 8,967.01 10,625.00 8,965.00 378.27 176.02 29.04 - 2,262.34 4,794.55 0.32 1,479.60 1,658.97 - 168.34 FAIL - Major Risk 12,700.00 8,967.01 10,650.00 8,964.60 378.27 176.02 29.03 - 2,274.58 4,772.76 0.32 1,458.25 1,658.90 - 189.68 FAIL - Major Risk 12,700.00 8,967.01 10,675.00 8,964.19 378.27 176.02 29.01 - 2,285.67 4,750.36 0.32 1,437.74 1,658.82 - 210.19 FAIL - Major Risk 12,700.00 8,967.01 10,700.00 8,963.75 378.27 176.02 29.00 - 2,295.57 4,727.41 0.32 1,418.17 1,658.73 - 229.76 FAIL - Major Risk 12,711.82 8,966.97 10,725.00 8,963.30 378.28 176.03 27.55 - 2,304.26 4,703.97 0.32 1,399.43 1,657.00 - 246.80 FAIL- Major Risk 12,725.00 8,966.92 10,750.00 8,962.86 378.29 176.03 25.95 - 2,311.70 4,680.12 0.32 1,381.93 1,653.91 - 261.25 FAIL - Major Risk 12,725.00 8,966.92 10,775.00 8,962.43 378.29 176.03 25.93 - 2,317.89 4,655.90 0.32 1,365.39 1,653.80 - 277.80 FAIL - Major Risk 12,725.00 8,966.92 10,800.00 8,962.02 378.29 176.04 25.92 - 2,322.80 4,631.39 0.32 1,350.12 1,653.70 - 293.07 FAIL - Major Risk 12,725.00 8,966.92 10,825.00 8,961.62 378.29 176.05 25.90 - 2,326.43 4,606.66 0.32 1,336.22 1,653.59 - 306.98 FAIL - Major Risk 12,737.50 8,966.87 10,850.00 8,961.25 378.30 176.05 24.38 - 2,328.75 4,581.78 0.32 1,323.54 1,649.50 - 315.66 FAIL - Major Risk 12,750.00 8,966.83 10,875.00 8,960.89 378.31 176.06 22.86 - 2,329.77 4,556.80 0.32 1,312.41 1,644.31 - 321.70 FAIL - Major Risk 12,750.00 8,966.83 10,900.00 8,960.56 378.31 176.07 22.85 - 2,329.48 4,531.81 0.32 1,302.64 1,644.19 - 331.49 FAIL - Major Risk 12,750.00 8,966.83 10,925.00 8,960.25 378.31 176.08 22.84 - 2,327.88 4,506.87 0.32 1,294.50 1,644.08 - 339.65 FAIL - Major Risk 12,762.46 8,966.78 10,950.00 8,959.96 378.32 176.09 21.32 - 2,324.98 4,482.04 0.32 1,287.83 1,637.82 - 340.18 FAIL - Major Risk 12,775.00 8,966.74 10,975.00 8,959.77 378.33 176.10 19.81 - 2,320.78 4,457.40 0.32 1,282.87 1,630.42 - 337.88 FAIL - Major Risk 12,775.00 8,966.74 11,000.00 8,959.72 378.33 176.12 19.81 - 2,315.32 4,433.01 0.32 1,279.43 1,630.31 - 341.35 FAIL - Major Risk 12,775.00 8,966.74 11,025.00 8,959.81 378.33 176.13 19.82 - 2,308.58 4,408.93 0.32 1,277.77 1,630.20 - 343.05 FAIL - Major Risk, ES, SF 12,789.40 8,966.68 11,050.00 8,960.03 378.34 176.15 18.10 - 2,300.66 4,385.22 0.32 1,277.55 1,620.39 - 333.61 FAIL - Major Risk 12,800.00 8,966.65 11,075.00 8,960.27 378.34 176.16 16.83 - 2,293.18 4,361.37 0.32 1,277.31 1,612.23 - 325.84 FAIL - Major Risk 12,800.00 8,966.65 11,100.00 8,960.46 378.34 176.18 16.85 - 2,286.97 4,337.16 0.32 1,276.09 1,612.14 - 327.10 FAIL - Major Risk 12,809.78 8,966.61 11,125.00 8,960.60 378.35 176.20 15.68 - 2,282.02 4,312.66 0.32 1,273.92 1,603.92 - 321.21 FAIL - Major Risk 12,825.00 8,966.56 11,150.00 8,960.69 378.36 176.21 13.85 - 2,278.37 4,287.93 0.32 1,270.92 1,589.90 - 310.35 FAIL - Major Risk 12,825.00 8,966.56 11,175.00 8,960.74 378.36 176.23 13.86 - 2,276.01 4,263.04 0.32 1,266.77 1,589.82 - 314.56 FAIL - Major Risk 12,825.00 8,966.56 11,200.00 8,960.73 378.36 176.25 13.86 - 2,274.96 4,238.07 0.32 1,261.81 1,589.73 - 319.57 FAIL - Major Risk 12,836.69 8,966.52 11,225.00 8,960.68 378.37 176.27 12.45 - 2,275.22 4,213.07 0.32 1,255.85 1,577.90 - 313.85 FAIL - Major Risk 12,850.00 8,966.47 11,250.00 8,960.59 378.38 176.29 10.85 - 2,276.78 4,188.13 0.32 1,249.06 1,563.31 - 306.21 FAIL - Major Risk 12,850.00 8,966.47 11,275.00 8,960.44 378.38 176.32 10.84 - 2,279.65 4,163.29 0.32 1,241.22 1,563.24 - 314.11 FAIL - Major Risk 12,850.00 8,966.47 11,300.00 8,960.25 378.38 176.34 10.84 - 2,283.81 4,138.65 0.32 1,232.60 1,563.18 - 322.79 FAIL - Major Risk 12,862.90 8,966.43 11,325.00 8,960.01 378.39 176.36 9.27 - 2,289.25 4,114.25 0.32 1,222.96 1,547.94 - 317.34 FAIL - Major Risk, CC CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:23PM Page 13 of 14 COMPASS 2003.16 Build 71 Wall • • BAKER ;ES Travelling Cylinder Report bp INTEQ Company: North America - ALASKA - BP Local Co- ordinate Reference: Well C -12 - Slot 12 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB C Pad MD Reference: 14 : 12 11/14/1979 00:00 @ 62.90ft (generic drilling rig Site Error: 0.00ft North Reference: True Reference Well: C -12 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 3, C -12B Database: EDM .16 - Anc Prod - WH24P Reference Design: Plan #3 Offset TVD Reference: Offset Datum Reference Depths are relative to 14 : 12 11/14/1979 00:00 @ 62.90ft (cCoordinates are relative to: C -12 - Slot 12 Offset Depths are relative to 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: 1.25° Ladder Plot I I 1600 ; ; ; 1 1 .,k I 1 1 I I I I 1 1 J J _ J J J J __ I I I I I I I 1 I I I , .. 1200 I I 1 I 1 I I I I 0 I , I 1 1 I I I z I I I 1 I a7 I I I I 11 CO I I I 1 , 2 I I I I I �� m 800 U I I I I 1 U O I I I I 1 2 _ 1 I I I I 1 a) I I I I I L) I I I I I I I I I I 1 I I I I I I 400 I I I I I I I I I I I I I I 1 I � I I I I I I I I I I 1 1 I I 1 I I I 1 I I 1 I I I I 0 0 2500 5000 7500 10000 12500 15000 M ea cured De plh LEG END C -12, C -12, C -12 V1 — .— C -10, C -10A, C -10AV3 C -31, C -31 B, Plan NO V3 C -12, C -12A C -12A VO C -10, C -10A, C -10Aw p05 V25 .-- C -32, C -32C, C32C V2 C- 12,C- 12APB1,C- 12AP81\O --9 C31,C- 31B,C -31BV2 C- 32,C- 32C, Plan #4V15 CC - Min centre to center distance or covergent point, SF - min separation factor, ES - min ellipse separation 7/31/2009 4:11:22PM Page 14 of 14 COMPASS 2003.16 Build 71 Alaska Department of Natural Retirees Land Administration System Page 1 of/ f Alaska Mapper Land Records /Status Plats Recorder's Search State Cabins Natural Resources Alaska DNR Case Summary File Type: ADL File Number: 28305 Printable Case File Summary See Township, Range, Section and Acreage? New Search @ Yes O No LAS Menu 1 Case Abstract 1 Case Detail 1 Land Abstract File: ADL 28305 maF Search for Status Plat Updates As of 08/06/2009 Customer: 000107377 BP EXPLORATION (ALASKA) INC PO BOX 196612/900 E. BENSON BL ATTN: LAND MANAGER - ALASKA ANCHORAGE AK 995196612 Case Type: 7 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: 2480.000 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: O11N Range: 014E Section: 17 Section Acres: 640 Search Plats Meridian: U Township: 011N Range: 014E Section: 18 Section Acres: 599 Meridian: U Township: O11N Range: 014E Section: 19 Section Acres: 601 Meridian: U Township: O11N Range: 014E Section: 20 Section Acres: 640 Legal Description 05 -28 -1965 * ** SALE NOTICE LEGAL DESCRIPTION * ** C14-126 11N 14E UM 17,18,19,20 2480.00 U- 3- 7 End of Case Summary Last updated on 08/06/2009. http://dnr.alaska.gov/projects/las/Case Summary. cf m ?FileType= ADL &FileNumber = 283 05... 8/6/2009 • TRANSMITTAL LETTER CHECKLIST WELL NAME .Z 4/ e /4Z PTD# =POP 0 iS" Development Service Exploratory Stratigraphic Test Non - Conventional Well FIELD: 1/D.4/OE / POOL: P,e1,./Q"/GL", ;07/ 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(0, 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 Field & Pool PRUDHOE BAY, PRUDHOE OIL - 640150 'x �' ,1, ' , „. -, —__ _ Well Name: PRUDHOE BAY UNIT C-12B Program DEV Well bore seg ❑ PTD #: 2090850 Company BP EXPLORATION (ALASKA) INC Initial Class/Type DEV / PEND GeoArea 890 Unit 11650 On /Off Shore On Annular Disposal ❑ Administration 1 Permit fee attached NA 1 2 Lease number appropriate Yes 3 Unique well name and number Yes 4 Well located in a defined pool Yes 1 5 Well located proper distance from drilling unit boundary Yes 1 6 Well located proper distance from other wells Yes 7 Sufficient acreage available in drilling unit Yes 25.60 acres. 1 8 If deviated, is wellbore plat included Yes 9 Operator only affected party Yes 10 Operator has appropriate bond in force Yes Blanket Bond # 6194193. 11 Permit can be issued without conservation order Yes I Appr Date 12 Permit can be issued without administrative approval Yes 1 13 Can permit be approved before 15 -day wait Yes ACS 8/6/2009 14 Well located within area and strata authorized by Injection Order # (put 10# in comments) (For NA 115 All wells within 1/4 mile area of review identified (For service well only) NA Ilk 16 Pre- produced injector: duration of pre production less than 3 months (For service well only) NA 17 Nonconven. gas conforms to AS31.05.030(j.1.A),(j.2.A-D) NA 1 18 Conductor string provided NA Conductor set in C -12A Engineering 19 Surface casing protects all known USDWs NA Surface casing set in C -12A I20 CMT vol adequate to circulate on conductor & surf csg NA Surface casing set in C-12A 121 CMT vol adequate to tie -in long string to surf csg NA 7" liner set and cemented. 22 CMT will cover all known productive horizons Yes 2 7/8" liner to be cemented back to 100' above window 23 Casing designs adequate for C, T, B & permafrost Yes 24 Adequate tankage or reserve pit Yes Rig equipped with steel pits. All waste to approved disposal wells. 25 If a re- drill, has a 10 -403 for abandonment been approved Yes P & A sundry 309 -268 126 Adequate welibore separation proposed Yes Proximity analysis performed. C -32C 333' ctr -ctr 127 If diverter required, does it meet regulations NA BOP's will be set up on Wellhead. Appr Date 28 Drilling fluid program schematic & equip list adequate Yes Max. expected Fm pressure 3207 psi (7.01 EMW) .... Drilling with 8.6 ppg GLS 8/7/2009 29 BOPEs, do they meet regulation Yes 30 BOPE press rating appropriate; test to (put psig in comments) Yes MASP = 2327 psi. BOP test to 350.0 psi 31 Choke manifold complies w /API RP -53 (May 84) Yes 32 Work will occur without operation shutdown Yes 33 Is presence of H2S gas probable Yes H2S present on C pad. 34 Mechanical condition of wells within AOR verified (For service well only) NA 35 Permit can be issued w/o hydrogen sulfide measures No Max level H2S on C Pad is 25ppm for well C-39A (4/16/09). Geology 1 36 Data presented on potential overpressure zones NA Appr Date 137 Seismic analysis of shallow gas zones NA ACS 8/6/2009 38 Seabed condition survey (if off - shore) NA 1 39 Contact name /phone for weekly progress reports [exploratory only} NA 1 Geologic Engineering P • Date: Date Date Commissioner: C i missioner Q Co fr M ner / / e--../ o -4 • • 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 information. • tapescan.txt * * ** REEL HEADER * * ** MWD 09/12/11 BHI 01 LIS Customer Format Tape * * ** TAPE HEADER * * ** MWD 09/09/17 2770143 01 3" CTK * ** LIS COMMENT RECORD * ** 11 111111111111111 11 Remark File version 1.000 1111 Extract File: ldwg.las version Information vERS. 1.20: CWLS log ASCII Standard - VERSION 1.20 WRAP. NO: One line per frame well Information Block # MNEM.UNIT Data Type Information STRT.FT 11158.0000: Starting Depth STOP.FT 13001.5000: Ending Depth STEP.FT 0.5000: Level Spacing NULL. - 999.2500: Absent Value COMP. COMPANY: BP Exploration (Alaska), Inc. WELL. WELL: C -12B FLD . FIELD: Prudhoe Bay Unit LOC . LOCATION: 70 deg 17' 55.875 "N 148 deg 40' 14.316 "w CNTY. COUNTY: North Slope Borough STAT. STATE: Alaska SRVC. SERVICE COMPANY: Baker Hughes INTEQ TOOL. TOOL NAME & TYPE: 3" CTK DATE. LOG DATE: 17 Sep 2009 API . API NUMBER: 500292038702 -Parameter Information Block #MNEM.UNIT Value Description SECT. 19 Section TOWN.N T11N Township RANG. R14E Range PDAT. MSL Permanent Datum EPD .F 0 Elevation Of Perm. Datum LMF . DF Log Measured from FAPD.F 62.94 Feet Above Perm. Datum DMF . DF Drilling Measured From EKB .F 0 Elevation of Kelly Bushing EDF .F 62.94 Elevation of Derrick Floor EGL .F 0 Elevation of Ground Level CASE.F N/A Casing Depth OS1 . DIRECTIONAL other Services Line 1 Remarks (1) All depths are Measured Depths (MD) unless otherwise noted. (2) All depths are Bit Depths unless otherwise noted. (3) All True vertical Depths (TVDSS) are Subsea corrected. (4) All Formation Evaluation data is realtime data. Page 1 • • tapescan.txt (5) Baker Hughes INTEQ utilized CoilTrak downhole tools and the Advantage surface system to log this well.. (6) Tools ran in the string included Casing Collar Locator, an Electrical Disconnect and Circulating Sub, a Drilling Performance Sub (Inner and Outer Downhole Pressure, vibration and Downhole weight on Bit), a Directional and Gamma Sub, and a Hydraulic Orienting Sub with a Near Bit Inclination Sensor. (7) Data presented here is final and has been depth adjusted to a Primary Depth Control log provided by schlumberger GR CNL dated 19 Sep 2009 per Adam van Holland with BP Exploration (Alaska), Inc. (8) The sidetrack was drilled from C -12 through a milled window in a 7 inch liner. Top of window 11382 ft.MD (8541.6 ft.TVDSS) Bottom of window 11389 ft.MD (8547.3 ft.TVDSS) (9) Tied to C -12 at 11300 feet MD (8478.0 feet TVDSS). (10) The interval from 11377 feet to 12000 feet MD (8538.0 ft. to 8961.6 ft. Tvoss) was logged 30 hours after drilling run 6. (11) The interval from 12964 feet to 13004 feet MD (8965.2 feet to 8965.2 feet TVDSS) was not logged due to sensor to bit offset at well TD. MNEMONICS: GRAX -> Gamma Ray [MWD] (MWD -API units) ROP AVG -> Rate of Penetration, feet /hour RACLX -> Resistivity (AT)(LS)400kHz- Compensated Borehole Corrected (OHMM) RACHX -> Resistivity (AT)(LS)2MHz- Compensated Borehole Corrected (OHMM) RPCLX -> Resistivity (PD)(LS)400kHz- Compensated Borehole corrected (OHMM) RPCLX -> Resistivity (PD)(LS)2MHz- Compensated Borehole Corrected (OHMM) TVDSS -> True vertical Depth (Subsea) CURVE SHIFT DATA BASELINE, MEASURED, DISPLACEMENT 11164.2, 11163.1, ! - 1.07715 11165.8, 11164, ! - 1.79395 11170.3, 11169.9, ! - 0.359375 11173.9, 11174, ! 0.179688 11176.4, 11176.4, ! 0 11178, 11178, ! 0 11179.6, 11179.6, ! 0 11181.8, 11181.9, ! 0.179688 11196.6, 11195.9, ! - 0.717773 11208.7, 11207.2, ! - 1.43555 11215.1, 11214.9, ! - 0.179688 11218, 11217.5, ! - 0.538086 11222.1, 11221.8, ! - 0.359375 11224.1, 11223.4, ! - 0.717773 11230, 11230, ! 0 11234, 11234.5, ! 0.538086 11238.8, 11239.3, ! 0.538086 11242, 11242.5, ! 0.538086 11248.1, 11247.7, ! - 0.359375 11250.9, 11250.9, ! 0 11252.9, 11253.5, ! 0.538086 11254.9, 11255.3, ! 0.358398 11266.9, 11266.9, ! 0 11268.7, 11268.5, ! - 0.178711 11271.9, 11272.1, ! 0.179688 11274.3, 11274.6, ! 0.359375 11278.6, 11278.2, ! - 0.358398 11282.2, 11281.3, ! - 0.897461 11284.1, 11283.1, ! - 1.07617 11292.9, 11291.8, ! - 1.07617 11293.6, 11293.6, ! 0 11296.3, 11296.9, ! 0.539062 11301.2, 11300.3, ! - 0.897461 11305.1, 11304.9, ! - 0.179688 11306.9, 11306.9, ! 0 11310.9, 11310.3, ! - 0.538086 11314.5, 11314.5, ! 0 11316.4, 11317, ! 0.538086 11326.7, 11326.7, ! 0 11330.4, 11331.9, ! 1.43555 11335.3, 11336, ! 0.717773 11350.7, 11351.3, . 0.538086 Page 2 • • tapescan.txt 11356.5, 11356.5, ! 0 11366.2, 11366.3, ! 0.178711 11371.5, 11371.9, ! 0.358398 11385.7, 11384.8, ! - 0.897461 11387.5, 11387.1, ! - 0.358398 11388.2, 11388.6, ! 1.25586 11394.9, 11396.1, i 1.43457 11401.4, 11402.9, ! .4345 11404.5, 11406.6, 7 i 1 2.15234 11408.6, 11410.4, 5 11410.4, 11412.4, i 1973 1.97363 i 11418.8, 11420.5, 1.79395 11421, 11422.8, i 11431.9, 11434.6, 2.69141 7 2.69141 11444.9, 11446.7, 11447.4, 11449.4, ! 1.97363 11450.9, 11452.7, ! 1.79395 11457.7, 11458.4, ! 0.716797 11469.2, 11469.3, ! 0.179688 11472.4, 11473.3, ! 0.896484 11486.9, 11486.7, ! - 0.178711 11491, 11491.2, ! 0.179688 11495, 11495.2, ! 0.179688 11497.7, 11497.9, ! 0.178711 11507.4, 11507.5, ! 0.179688 11516.9, 11516.9, ! 0 11528, 11527.6, ! - 0.358398 11533.4, 11533.9, ! 0.538086 11538.9, 11538.4, ! - 0.539062 11547.9, 11547.5, ! - 0.358398 11551.1, 11550.6, ! - 0.538086 11568.6, 11569.9, ! 1.25586 11570.9, 11572.6, ! 1.61426 11577.9, 11579.6, ! 1.61426 11618.4, 11618.7, i 0.3583 11644.1, 11643.8, 11645.8, 11646.1, ! 0.383988 11658.9, 11658.7, -0.179688 11662.9, 11663.5, 11667, 11667.6, ! 0.538086 11677.3, 11678.5, ! 1.25586 11679.8, 11680.1, ! 0.359375 11701, 11701.9, ! 0.897461 11712, 11711.6, ! - 0.359375 11725.6, 11725.8, ! 0.178711 11735.8, 11737.5, ! 1.61426 11743.9, 11744.6, ! 0.717773 11748.8, 11748.8, ! 0 11762.8, 11763, ! 0.179688 11769.5, 11768.9, ! - 0.538086 11779, 11779.7, ! 0.717773 11784.5, 11786.5, ! 0.538086 11789.2, 11789.7, i 0.179688 11795.7, 11795.8, 11804.3, 11804.3, 00.178711 11810.8, 11810.6, 11815.4, 11815.4, ! 0 11820.1, 11819.4, ! - 0.717773 11826.5, 11827.2, ! 0.717773 11830.9, 11829.9, ! - 1.07617 11838.8, 11838.1, ! - 0.717773 11858.2, 11859.8, i 1.61426 11869.2, 11871.5, 11883.8, 11887, ! 3.22949 11893.1, 11895.7, ! 2.51172 11898.4, 11900, ! 1.61426 11930.8, 11932.8, ! 1.97363 11960.2, 11961.7, ! 1.43555 12018.7, 12019.2, ! 0.538086 12030.4, 12029.7, . - 0.716797 Page 3 • • tapescan.txt 12055.6, 12056.2, ! 0.538086 12066.5, 12065.7, -0.716797 _ 12103.4, 12102.2, i -2.87012 12126.2, 12123.3, 12188.4, 12184.3, i -3.0498 -4.12598 12194.8, 12191.8, i _2350 4 12199, 12196.8, i 34 12216.4, 12215.1, ! -1.25586 52 -0.179688 12218.5, 12218.4, 12236.9, 12236.7, ! - 0.178711 12247.3, 12245.9, ! - 1.43457 12252.2, 12251.3, ! - 0.896484 12258.7, 12257.4, -0.896484 12267.5, 12266.6, i 8964864 5 12349.7, 12345.3, -4.48535 12366.2, 12361, ! - 5.20215 12382, 12375.4, ! i - 6.637717 12458.8, 12459.8, i 0.179688 12493.6, 12493.8, 12499.2, 12499.7, ! 0.538086 12630, 12627.5, ! - 2.51172 12803.6, 12801.1, . - 2.51172 EOZ END ! BASE CURVE: GROH, OFFSET CURVE: GRAX Tape subfile: 1 210 records... Minimum record length: 10 bytes Maximum record length: 132 bytes * * ** FILE HEADER * * ** MWD .001 1024 * ** INFORMATION TABLE: CONS * ** LIS COMMENT RECORD * ** 111111111111111 Remark File Version 1.000 The data presented here is final and has been depth adjusted to a Primary Depth Control log provided by Schlumberger GR CNL dated 19 Sep 2009 per Adam van Holland with BP Exploration (Alaska), Inc. * ** INFORMATION TABLE: CIFO * FORMAT RECORD (TYPE# 64) Data record type is: 0 Datum Frame Size is: 28 bytes Logging direction is down (value= 255) Optical Log Depth Scale units: Feet Frame spacing: 0.500000 Frame spacing units: [F ] Number of frames per record is: 36 one depth per frame (value= 0) Datum specification Block Sub - type is: 1 FRAME SPACE = 0.500 * F Page 4 • tapescan.txt ONE DEPTH PER FRAME Tape depth ID: F 6 Curves: Name Tool Code Samples Units Size Length 1 GR MWD 68 1 AAPI 4 4 2 ROP MWD 68 1 F /HR 4 4 3 RAD MWD 68 1 OHMM 4 4 4 RAS MWD 68 1 OHMM 4 4 5 RPD MWD 68 1 OHMM 4 4 6 RPS MWD 68 1 OHMM 4 4 24 Total Data Records: 103 Tape File start Depth = 11158.000000 Tape File End Depth = 13001.500000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet * * ** FILE TRAILER * * ** Tape subfile: 2 116 records... Minimum record length: 54 bytes Maximum record length: 4124 bytes * * ** FILE HEADER * * ** MWD .002 1024 * ** INFORMATION TABLE: CONS * ** LIS COMMENT RECORD * ** 111111111 111111111 Remark File version 1.000 This file contains the raw - unedited field MWD data. * ** INFORMATION TABLE: CIFO * FORMAT RECORD (TYPE# 64) Data record type is: 0 Datum Frame size is: 28 bytes Logyin direction is down (value= 255) optical Loy Depth Scale Units: Feet Frame spacing: 0.250000 Frame spacing units: [F ] Number of frames per record is: 36 one depth per frame (value= 0) Datum specification Block Sub -type is: 1 FRAME SPACE = 0.250 * F Page 5 • • tapescan.txt ONE DEPTH PER FRAME Tape depth ID: F 6 Curves: Name Tool Code Samples Units Size Length 1 GR MWD 68 1 AAPI 4 4 2 ROP MWD 68 1 F /HR 4 4 3 RAD MWD 68 1 OHMM 4 4 4 RAS MWD 68 1 OHMM 4 4 5 RPD MWD 68 1 OHMM 4 4 6 RPS MWD 68 1 OHMM 4 4 24 Total Data Records: 206 Tape File Start Depth = 11158.750000 Tape File End Depth = 13004.000000 Tape File Level Spacing = 0.250000 Tape File Depth Units = feet * * ** FILE TRAILER * * ** Tape Subfile: 3 219 records... Minimum record length: 54 bytes Maximum record length: 4124 bytes * * ** TAPE TRAILER * * ** MWD 09/09/17 2770143 01 * * ** REEL TRAILER * * ** MWD 09/12/11 BHI 01 Tape Subfile: 4 2 records... Minimum record length: 132 bytes Maximum record length: 132 bytes Tape Subfile 1 is type: LIS 0 Tape Subfile 2 is type: LIS Page 6 R • • tapescan.txt DEPTH GR ROP RAD RAS RPD RPS 11158.0000 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 11158.5000 101.0172 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 13001.5000 - 999.2500 43.5000 - 999.2500 - 999.2500 - 999.2500 - 999.2500 Tape File Start Depth = 11158.000000 Tape File End Depth = 13001.500000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet 0 Tape Subfile 3 is type: LIS DEPTH GR ROP RAD RAS RPD RPS 11158.7500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 11159.0000 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 - 999.2500 13004.0000 - 999.2500 43.5000 - 999.2500 - 999.2500 - 999.2500 - 999.2500 Tape File Start Depth = 11158.750000 Tape File End Depth = 13004.000000 Tape File Level Spacing = 0.250000 Tape File Depth Units = feet 0 Tape Subfile 4 is type: LIS Page 7
