Department of Commerce, Community, and Economic Development
Alaska Oil and Gas Conservation
Commission
HOME
EVENTS
DATA
Data List
Drilling
Production
Orders
Data Miner
Document Search
REPORTS
Reports and Charts
Pool Statistics
FORMS
LINKS
Links
Test Notification
Data Requests
Regulations
Industry Guidance Bulletins
How to Apply
ABOUT US
History
Staff
HELP
Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
196-025
STATE OF ALASKA • ALASKA OIL D GAS CONSERVATION COMMISSO WELL COMPLETION OR RECOMPLETION REPORT AND LOG la. Well Status: ❑ Oil ❑ Gas ❑ SPLUG ❑ Other ® Abandoned ❑ Suspended 1b. Well Class: 20AAC 25.105 20AAC 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. 9/29/2010 196 -025 310 -228 3. Address: 6. Date Spudded: 13. API Number: P.O. Box 196612, Anchorage, Alaska 99519 -6612 03/24/1996 50- 029 - 22645 -60 -00 4a. Location of Well (Governmental Section): 7. Date T.D. Reached: 14. Well Name and Number: Surface: 03/29/1996 PBU S-41 L1 4152' FSL, 4504' FEL, SEC. 35, T12N, R12E, UM 8. KB (ft above MSL): 71 15. Field / Pool(s): Top of Productive Horizon: 3469' FSL, 1066' FWL, SEC. 25, T12N, R12E, UM GL (ft above MSL): 37' Prudhoe Bay Field / Prudhoe Bay Total Depth: 9. Plug Back Depth (MD +TVD): Oil Pool 4143' FSL, 3070' FWL, SEC. 25, T12N, R12E, UM 14085' 8941' 4b. Location of Well (State Base Plane Coordinates, NAD 27): 10. Total Depth (MD +TVD): 16. Property Designation: Surface: x- 618930 y- 5980355 Zone- ASP4 14085' 8941' ADL 028257 TPI: x- 624419 y- 5985042 Zone- ASP4 11. SSSV Depth (MD +TVD): 17. Land Use Permit: Total Depth: x- 626411 Y- 5985750 Zone- ASP4 2215' 2152' 18. Directional Survey: 0 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 MDTrVD: MWD, DIFL, AC. GR, DIL, ZDEN, LWD 11892' 8889' 23. CASING, LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT CASING WT. PER FT. GRADE TOP I BOTTOM ToP BOTTOM SIZE CEMENTING RECORD PULLED 20" 91.5# H - 40 Surface 80' ,Surface 80' 30" -260 sx Arctic Set (Aoorox.) 9 -5/8" 40# L -80 34' 3332' 34' 3045' 12 -1/4" 1067 sx CS III. 272 sx 'G'. 30 sx CS II 7" 26# / 29# L -80 33' 11892' 33' 8889' 8 -1/2" 360 sx Class 'G'. 212 sx'G' 4 -1/2" 12.6# L -80 11921' 14035' 8901' 8944' 6" Uncemented Slotted Liner 24. Open to production or injection? ❑ Yes .I 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): None 4 -1/2 ", 12.6 #, L -80 11962' 11702' / 8807' MD TVD MD TVD 26. ACID, FRACTURE, CEMENT SQUEEZE; ETC. DEPTH INTERVAL (MD) AMOUNT AND KIND OF MATERIAL USED i ED JAN 1 2 2Olt 12190' Set Cement Retainer and P&A with163 Bbls Class 'G' 12175' - 12185' Perf for Cement Squeeze 12021' Set EZSV, Set fast drill plug at 11692' and squeeze 262 Bbls'G' below clean L 4 OW to 12021' 4- S L 12020' Set 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 anal per 20 AAC 250.071. CEIV None RBDWIS DEC 10 DEC 9 2p -. Alaska Oil & Gas Gone. Cammissian Form 10 -407 Revised 12/2009 CONTINUED ON REVERSE Anchn ubmit Original Only 29. GEOLOGIC MARKERS (List all formations and markers encountered): 30. FORMATION TESTS NAME MD • TVD Well Tested? ❑ Ye No Permafrost Top If yes, list intervals and form s tested, briefly summarizing test Permafrost Base results. Attach separate sheets to this form, if needed, and submit detailed test information per 20 AAC 25.071. Sag River 11880' 8884' None Sag River 14040' 8944' Formation at Total Depth (Name): 31. List of Attachments: Well History Summary and Summary of Daily Drilling Reports, Well Schematic Diagram. 32. I hereby certify that the foregoin• is true and correct to the best of my knowledge. jj Signed: Sondra tewman /%.- ;` /Taw Title: Drilling T echnologist D ate: '`� " l PBU S L1 196 - 025 310 - 228 Prepared By Name/Number. Sondra Stewman, 564 -4750 Well Number Permit No. / Approval No. Drilling Engineer: Mel Rixse, 564 -5620 INSTRUCTIONS General: This form is designed for submitting a complete and correct well completion report and log on all types of lands and leases in Alaska. Submit a well schematic diagram with each 10-407 well completion report and 10-404 well sundry report when the downhole well design is changed. Item 1 a: Classification of Service Wells: Gas Injection, Water Injection, Water - Alternating -Gas Injection, Salt Water Disposal, Water Supply for Injection, Observation, or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI (Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level elevation in feet above mean sea level. Use same as reference for depth measurements given in other spaces on this form and in any attachments. Item 13: The API number reported to AOGCC must be 14 digits (ex: 50- 029 - 20123- 00 -00). Item 20: Report true vertical thickness of permafrost in Box 20. Provide MD and 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 TREE = 4-1/16" CIW ;WELLHEAD = FMC • S -4 1 A SAFETY NO. CHROME TBG & LNR ACTUATOR = BAKER KB. ELEV = 71.7 A L 1 BF. ELEV = 37' KOP = 1131` DRLG DRAFT Max Angle = 98 g 14925' J 2226 - 4 1 f2" HES X Nipple. ID = 3.813 "' Datum MD= 11843' Datum TVD = 8800' SS GAS LIFT MANDRELS ST MD T DEV TYPE I VLV LTCH PORT DATE 5 3742 3331 48 KBG-2 . DOME BK 16 10124110 I 9 -5/8" CSG, 40#, L -80, ID = 8.835" H 3332' 1 — A r 4 7112 ' 5568 47 KBG-2 SO BK 20 10/24/10 IF 3 9705 7345 47 KBG-2 DMY BK " 0 10/20/10 2 11639 8777 65 KBG-2 DMY BK ° 0 10/20/10 1 11807 8849 64 KBG-2 DMY BK ' 0 10/20/10 Minimum ID = 3.726" @ 11915' 1 4 -112" HES XN NIPPLE 1 7" CSG 26# X 7" CSG 29# Xo H 1 1371' 116 72' — - 1/2" HES X NIPPLE, 9CR, ID = 3.813" 1 0 �� �. 11702' --17" X 4 -1/2" HES TNT PKR, ID = 3.856" I I RA PIP TAG 1—I 11782' 1 I 11778' 1-14-1/2" HES X NIPPLE, 9CR, ID = 3.813" 1 111 I 11842' 1 -14 -1/2" BAKER SLIDING SLEEVE, ID = 3.813" I 7" CSG VIANDOW 11892' - 11905' (S-41 L1) SQUEEZED OFF 9/22/2010 17" CSG WINDOW 11926' - 11939' (S- 41A -L1) 1 I MECHANICAL CUT SLOTTED LINER 10/17/2010 I-1 11947' 1 1 11915' 1--14 -1/2" HES XN NIPPLE, 9CR, ID = 3.725" I [4 -1/2" SLOTTED LINER 12.6 #, L -80 ID = 3.985" H 13701' 1 1 11950' 1-14-1/7' BAKER SEA ASSEMBLY 1 Ei 1 4 -1/2" TBG,12.6 #,13 Cr 85, .0152bpf, ID= 3.958" I 1 11962' 11954' 5" X 7" HRD ZXPN LTP W/11.79' X 5.25" PBR 1 11976' 5" X 7" FLEXLOCK LINER HANGER 1 I 7" CSG, 29#, L -80, .0371 bpf, ID= 6.184" H 12409' PERFORATION SUMMARY REF LOG: MWD 1 11976' H RA PIP TAG 1 ANGLE AT TOP PERF: 86° * y . , Note: Refer to Production DB for historical pert data SIZE I SPF INTERVAL Opn /Sqz DATE ----■ S -41AL1 t , SLTD LNR 11948 - 13701 0 09/30/10 S-41A 6 14200 - 14350 0 10/09/10 I 3" 6 14940 - 15150 0 10/09/10 / I 1 , 3" 6 13700 - 14100 0 10/09/10 I ".'" "•`Ml 1 PBTD H 15326' 1 3" 6 13200 - 13600 0 10/09/10 3" 6 12700 - 13100 0 10/09/10 1 41/2" Solid LNR,12.6#,13 -Cr 85, ID = 3.958" 1 1 15413` 1 DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOEBAY UNIT 04/02/96 ORIGINAL COMPLETION WELL: S -41A &ALI 10/23/10 N7ES SDTRCK 1 LAT (S- 41AIAL1) PERMIT No: 2101010 / 2101020 API No: 50- 029 - 22645 -01 1 -61 -00 SEC 35, T1 2N, R12E, 4152 FSL & 4504' FEL BP Exploration (Alaska) • • S -41 & S -41 L1, Well History (Pre Rig Sidetrack) Date Summary 07/28/10 CTU #5 Job Scope: Mill Scale MIRU MU Motor w /3.80" Turbo Mill 07/29/10 CTU #5 Job Scope: Mill Scale * * * * ** Continued from 7/29/10 * * * ** RIH w/3.80" Turbo Scale Mill. Mill scale from 11246' to 11334' ctmd. Freeze protect tubing with 38 Bbls of 50/50 McOH. RDMO. ** *Job Complete. * ** 08/11/10 T /I /0= 700/700/100, Temp =SI. PPPOT-T (FAIL), PPPOT -IC (PASS). Pre RST. PPPOT -T: Stung into test void (0+ psi), bled to 0 psi. Functioned LDS (ET style), all moved freely (1 "). Pumped through void, good returns. Pressured void to 5000 psi for 30 min test, lost 100 psi in 15 min, lost 100 psi in second 15 min. Bled void to 0 psi. Troqued LDS to 450 lb/ft. Pressured void to 5000 psi, lost 150 psi in 15 min, lost 100 psi in second 15 min (FAIL). Bled void to 0 psi. PPPOT -IC: Stung into test void (850 psi), bled to 0 psi. Functioned LDS (ET style), all moved freely (1"). Pumped through void, good returns. Pressured void to 3500 psi for 30 min test, lost 100 psi in 15 min, lost 0 psi in second 15 min (PASS). Bled void to 0 psi. 08/13/10 ** *WELL S/I ON ARRIVAL ** *(pre sdtrk) DRIFT TO 11,307' SLM W/ 3.80" CENT, 3.00" S- BAILER, UNABLE TO MAKE ANY HOLE (No recovery). CURRENTLY RIH W/ 3.75" G -RING TO 11,307' SLM. ** *JOB IN PROGRESS, CONTINUED ON 8/14/10 WSR * ** 08/14/10 ** *CONTINUED FROM 8/13/10 WSR ** *(pre sdtrk) RAN 3.75" G -RING TO 11,315' SLM, UNABLE TO MAKE ANY HOLE. RAN 3.50" G -RING TO 11,315' SLM, UNABLE TO MAKE ANY HOLE. RAN 3.00" G -RING TO 11,315' SLM, UNABLE TO MAKE ANY HOLE. RAN 2.80" CENT, 1.75" S -BLR TO 11,315' SLM, UNABLE TO MAKE ANY HOLE. RAN 1.75" CENT, 1.50" S -BLR TO 11,315' SLM, UNABLE TO MAKE ANY HOLE. TAGGED ST #3 @ 9,193' SLM (9,206' MD) W/ 1.25" L.I.B. (Impression of int- latch). TAGGED RESTRICTION @ 11,307' SLM W/ 3.77' WFD WRP DRIFT (See log for details). TAGGED RESTRICTION @ 11,307' SLM W/ 3.80" CENT (See log for details). JOB NOT COMPLETE, E -LINE WILL RETURN TO SET 4 -1/2" WFD WRP. ** *WELL S/I ON DEPARTURE, NOTIFIED PAD OPERATOR OF WELL STATUS * ** 08/14/10 Assist wireline as directed- ** *Job cancelled per SSL PE * ** 08/17/10 T /I /0= 750/720/100 Assist E -line; CMIT -TxIA PASSED to 4000 psi, MIT -OA PASSED to 2000 psi (pre sidetrack). Pumped 4 bbls neat meth, 251 bbls 1% KCL and a 40 bbl DSL freeze protect down the TBG to load. E -line set plug. Pressured up TBG /IA with 39.9 bbls DSL. TBG /IA lost 100/80 psi in 15 min and 40/40 psi in the 2nd 15 minutes for a total 30 minute loss of 140/80 psi. Bled IAP (16 bbls, all fluid). MIT - OA; Pressured up OA with 1.5 bbls DSL. OA lost 90 psi in 15 minutes and 30 psi in the second 15 minutes for a total 30 minute loss of 120 psi. Bled OAP (1.5 bbls, all fluid). * *SV,WV, A/L line shut; SSV, MV, IA, OA open ** FWP's=380/560/0 08/17/10 ** *WELL SHUT IN ON ARRIVAL * * * *(E -LINE - SET PLUG) INITIAL T /I /0= 700/720/160 PSI. SET HES 4.5" EZ DRILL BRIDGE PLUG AT 11322.0' LRS CMIT TxIA TO 4000 PSI (PASSED), AND MITOA TO 2000 PSI (PASSED) RIG DOWN FOR THE NIGHT. FINAL T /I /0 = 400/560/0 PSI ** *WELL LEFT SHUT IN, WV,SV = CLOSED, MV,SSV,SSSV = OPEN, IA/OA = OTG, TREE CAP ON AND PRESSURE TESTED, DSO NOTIFIED, JOB WILL CONTINUE ON 18 - 2010 * * ** Page 1 of 2 • • S -41 & S -41 L1, Well History (Pre Rig Sidetrack) Date Summary 08/18/10 * **WELL SHUT IN ON ARRIVAL "" "(E -LINE - CUT TUBING) JOB CONTINUED FROM PREVIOUS DAY INITIAL T /I /O= 350/560/0 PSI CUT TUBING AT 11308' WITH 3.65" POWERUTTER. HAD STRANDED ARMOR AT 250', DID BOP BOOGIE AND WAS ABLE TO COME OUT OF THE WELL AFTER CUT. FINAL T /I /O = 350/540/0 PSI ** *WELL LEFT SHUT 08/20/10 T /I /O = 320/500/0 Verified barriers prior to setting CIW TWC 4" H plug. PT tree to 5k (PASS) PT Adaptor flange void to 5k, Lost 143 psi in the first 15 min. lost 60 psi in second 15 min. (PASS) Pulled CIW TWC 08/21/10 T /I /O= 300/500/60 Temp= SI Circ -out- (Pre sidetrack) Pumped 3 bbls neat methanol spear followed with 36 bbls 90* 1% KCL, Unit broke yoke on driveline, RD road back to shop, Final WHP's 300/380/100 "Valve position @ departure- Swab, Wing, Master= SI / SSV, IA & OA= Open" 08/21/10 T /I /O= VacNac /6. Temp =SI. Bleed WHPs to 0 psi (Pre CTD). AL SI & blinded CO casing valve, ALP 1910 psi. TBG, IA, OA FL's near surface, bled OAP from 6 psi to 0 psi in 10 mins (gas). Monitor for 30 mins, Pressures unchanged. Final WHPs = VacNac /0. Job complete. SV, WV, MV= Closed. SSV =Open. IA, OA =OTG. 0821/10 T /I /O= 200/240/100 Temp= S/I Circ -out. Pumped 2 bbls neat methanol spear followed with 543 bbls 100* 1% KCL capped with 73 bbls 55* diesel down TBG taking returns up IA through hardline & skid to FL of well S -42, U -tube for 1 hr to put FP in place, Bleed WHP's to 0 psi, Pumped 5 bbls neat methanol through hardline & skid to FL of S -42 for FP, Final WHP's 0/0/0 "Valve position © departure- Swab, Wing, Master= SI / SSV, IA & OA= Open" 08/22/10 T /I /O= BPV /0/0 Temp =S1 PPPOT -T (PASS) (Pre RST) PPPOT -T : RU 2 HP BT onto THA test void 250 psi bled to 0 psi. Flushed void until clean returns achieved, pressured void to 5000 psi for 30 min test, 4900/ 15 min, 4900/ 30 min. Bled void to 0 psi, did not cycle LDS "ET style" verified torque. RD all test equipment. 08/29/10 T /I /O= Vac /0/0 P/T SN (barrier) for 5 min. © 500 psi w /20 psi loss- MN © 500 psi w /40 psi loss; P/T lubricator © 500 psi low /pass -3500 psi high /pass; Set 4" CIW H BPV #151 Q 108" w/1 -1' ext.; Upon completion P/T tree cap to 500 psi; Pre Nabors 7ES 09/06/10 T /I /O = 0/0/0 Pulled 4" CIW H BPV w /1 -2' ext. C© 102" Pressure tested lubricator to 300psi/ 5 in. (passed) and 3500 psi/ 5 min. (passed) 09/07/10 T /I /O = 0/0/0 Pulled 4" CIW H TWC thru BOPE w/ 4 -5' ext. C© 82" RKB = 24.38' + 1.75' Pressure tested lubricator to 500 psi (pass) and 3500 psi (pass) Page 2 of 2 • • s. -- ..zi ; b ra iNet 1/4 51t4' , p Common Well Name: S-41 AFE No Event Type: MOBILIZATION (MOB) Start Date: 9/3/2010 End Date: 9/6/2010 X3- 00W9R -C (835,325.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 9/3/2010 00:00 - 07:00 7.00 RIGD P PRE R/D FLOOR PREP TO LOWER DERRICK, SECURE & DISCONNECT PITS, MOVE PITS OUT OF SUB CRITICAL PATH, BRIDLE UP & LAY OVER DERRICK, PREP SUB TO MOVE 07:00 - 00:00 17.00 MOB P PRE MOVE RIG OFF DS-5 AND BEGIN JOURNEY TO S PAD. SUB 1/4 MILE FROM FRONTIER CORNER AT MIDNIGHT, 9/4/2010 00:00 - 02:00 2.00 MOB P PRE RIGHT AFTER THE FIRST TURN AT FRONTIER CORNER, ALONG SIDE LAKE AFRICA, SUB PUNCHED THROUGH SPINE RD WITH ALL TIRES. 02:00 - 08:00 6.00 MOB N SFAL PRE SECURE DUNNAGE TO PUT UNDER WHEELS, JACK RIG UP AND CONTINUALLY ADD DUNNAGE. 08:00 - 09:30 1.50 MOB P PRE MOVE SUB ANOTHER MILE DOWN THE ROAD BEFORE TIRES BROKE THROUGH AGAIN 09:30 - 12:30 3.00 MOB N SFAL PRE SECURE DUNNAGE TO PUT UNDER WHEELS, JACK RIG UP AND CONTINUALLY ADD DUNNAGE TO FREE SUB 18:00 - 00:00 6.00 MOB P PRE MOVE SUB FROM LAKE AFRICA TO J -PAD. LEAP FROG MATS 9/5/2010 00:00 - 01:30 1.50 MOB P PRE CONTINUE TO MOVE SUB FROM LAKE 'AFRICA TO J -PAD WHILE LEAP FROGGING MATS 01:30 - 02:00 0.50 MOB P PRE MOVE SUB FROM J -PAD TO BALL MILL WITHOUT RIG MATS 02:00 - 09:00 7.00 MOB P PRE STAGE SUB AT BALL MILL AND STAGE RIG MATS AT VARIOUS SPOTS ALONG ROAD 09:00 - 15:00 6.00 MOB P PRE MOVE SUB FROM BALL MILL TO S PAD AND STAGE ON S -PAD 15:00 - 00:00 9.00 MOB P PRE MOVE PITS, SHOP AND CAMP FROM DS 05 TO S PAD. INSPECT GERTS AND LOAD BEARING BEAMS ON SUB. PJSM WITH LITTLE RED. PRESSURE TEST LINES TO 2500 PSI AND PRESSURE TEST OA TO 2000 PSI FOR 30 MIN. LOST 60 PSI IN THE FIRST 60 MIN AND 30 PSI IN THE SECOND 15 MIN. 9/6/2010 00:00 - 02:30 2.50 MOB P PRE CONTINUE TO MOVE PITS, CAMP AND SHOP FROM DS 5 TO S PAD. HANG TREE IN CELLAR, LAY RIG MATS AND HERCULITE AROUND WELL, STAGE WELL HEAD EQUIPMENT IN CELLAR 02:30 - 04:00 1.50 MOB P PRE SPOT SATELLITE CAMP, SHOP AND STAGE PITS 04:00 - 06:00 2.00 MOB P PRE SPOT SUB AND PITS OVER S -41A 06:00 - 08:30 2.50 MOB P PRE CONNECT SERVICE LINES AND ELECTRICAL LINES TO PITS, CAMP, SHOP, BERM SUB AND PITS. SPOT CUTTINGS TANK 08:30 - 09:30 1.00 MOB P PRE PJSM, RAISE DERRICK, PIN DERRICK, CATTLE SHOOT 09:30 - 12:00 2.50 MOB P PRE PJSM, BRIDLE DOWN, RU RIG FLOOR, RU TIGER TANK, RU SECONDARY ANNULUS VALVES. RIG ACCEPTED AT 1200 HRS 12:00 - 13:00 1.00 RIGU P PRE RU LINES TO TUBING AND IA. RU CELLAR. 13:00 - 13:30 0.50 RIGU P PRE PRE -SPUD MEETING. Printed 12/9/2010 2:03:50PM • . . , W r �, =e. �� .,a �' � .� � � a " �-zs ,+-` ; ``� ,,t. -� � ?� r� ..,- � � � �, � .. ,. �g " s �. � - f � �[ �t �''� c� �€'� r� � 3 ; � fi � .. A - Opera1io� umma y deport � Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 9/6/2010 13:30 - 16:00 2.50 WHSUR P DECOMP PJSM WITH DSM. RU LUBRICATOR AND TEST TO 250 PSI LOW AND 3500 PSI HIGH. PULL BPV. RIG DOWN DSM. 16:00 - 19:00 3.00 WHSUR P DECOMP PJSM, RU CIRCULATING LINES. REVERSE CIRCULATE 49 BBLS AT 4 BPM AND 600 PSI. CIRCULATE DOWN THE TUBING 39 BBLS. CIRCULATE BARAKEEN SOAP PILL SURFACE TO SURFACE AT 5 BPM AND 840 PSI. RD AND BLOW DOWN LINES 19:00 - 22:00 3.00 WHSUR P DECOMP DRY ROD IN TWC AND TEST FROM ABOVE TO 3500 PSI AND BELOW TO 1000 PSI FOR 5 MIN. RD AND BLOW DOWN LINES 22:00 - 23:30 1.50 WHSUR P DECOMP PJSM, BLEED CONTROL LINES AND NU TREE AND ADAPTER FLANGE 23:30 - 00:00 0.50 WHSUR P DECOMP THREADS ON HANGER ARE ROLLED. UNABLE TO MAKE UP CROSSOVER. PJSM, NU BOPE 9/7/2010 00:00 - 03:30 3.50 BOPSUR P DECOMP PJSM, NU BOPE, INSTALL TURNBUCKLES AND RISER. 03:30 - 04:00 0.50 BOPSUR P DECOMP RU TO TEST BOPE. 04:00 - 04:30 0.50 BOPSUR N WAIT DECOMP WAIT ON ARRIVAL OF 4 -1/2" DONUT TEST JT. 04:30 - 06:00 1.50 BOPSUR P DECOMP RU 4 -1/2" DONUT TEST JT AND REMAINING TEST EQUIPMENT. 06:00 - 11:30 5.50 BOPSUR P DECOMP TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 3,500 PSI HIGH WITH 4 -1/2" TEST JOINT. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4 -1/2" TEST JOINT. - ALL TESTS GOOD. AOGCC REP JEFF JONES WAIVED WITNESS TO THE TEST ON 09/05/2010. TEST WITNESSED BY BP WSLS RYAN CIOLKOSZ AND DAVE NEWLON AND NAD TOOLPUSHERS LARRY WURDEMAN AND LENWARD TOUSSANT. 11:30 - 12:00 0.50 BOPSUR P DECOMP RD /BD TEST EQUIPMENT. 12:00 - 15:30 3.50 WHSUR P DECOMP RU DSM AND LUBRICATOR EXTENSION. - TEST TO 250 PSI LOW AND 3,500 PSI HIGH; TEST GOOD. - PULL TWC. 15:30 - 16:30 1.00 PULL P DECOMP 4 -1/2" TUBING HANGER SPEARING AND LD OPERATION. - PJSM WITH ALL INVOLVED HANDS FOR TUBING HANGER SPEARING AND LD OPERATION. - MU SPEAR. - RIH AND ENGAGE SPEAR IN TUBING HANGER. - BOLDS. - UNSEAT TUBING HANGER WITH PU WT 150K. - PULL TUBING HANGER TO RIG FLOOR. - LD SPEAR AND TUBING HANGER. Printed 12/9/2010 2:04:20PM } ` � .:', a >�^� , 4 �^ � �` a -��„`. Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:30 - 17:00 0.50 PULL P DECOMP UNANNOUNCED H2S AND RIG EVACUATION FULL MUSTER DRILL. - ALL RIG AND SERVICE COMPANY PERSONNEL ACCOUNTED FOR. - DISCUSSED FACT WITH ALL INVOLVED THAT S PAD IS AN H2S PAD AND THAT WE ARE TO STAY OUT OF THE WELL HOUSES. WE ALSO DISCUSSED THE FACT THAT EVERYONE BESIDES THE DRILLER AND A DESIGNATED FLOOR HAND IMMEDIATELY EVACUATES THE RIG AND ASSEMBLES AT THE MUSTER POINT AND THAT THESE TWO INDIVIDUALS DON SCBA AND SECURE THE WELL BEFORE EVACUATING THE RIG. 17:00 - 19:00 2.00 PULL P DECOMP RU TO CIRCULATE. - PUMP 25 -BBL BARAKLEAN SOAP PILL. CIRCULATE SURFACE TO SURFACE. 252 GPM, 620 PSI, 443 BBLS PUMPED. - MONITORED WELL FOR 20 MINUTES; WELL STATIC. - RD AND BD LINES. 19:00 - 00:00 5.00 PULL P DECOMP POH AND LD 4 -1/2 ", 12.6#, L -80 TUBING FROM 11,308' TO 6,389'. 9/8/2010 00:00 - 05:00 5.00 PULL P DECOMP POH AND LD 4 -1/2 ", 12.6#, L -80 TUBING FROM 6,389' TO SURFACE. - RECOVERED 266 FULL JTS, 49 SS BANDS, 6 GLMS, 1 SSSV AND ASSOCIATED CONTROL LINES, AND 1 CUT JT (18.73') WITH X NIPPLE. - TUBING CUT LEFT 1.8' STUMP LOOKING UP ABOVE PACKER. 05:00 - 06:00 1.00 BOPSUR P DECOMP MONITOR WELL; WELL STATIC. - RU BOPE TEST EQUIPMENT. - CLEAN AND CLEAR RIG FLOOR. 06:00 - 06:30 0.50 BOPSUR P DECOMP CONTINUE RU TEST EQUIPMENT AND PU 4" TEST JT. 06:30 - 08:30 2.00 BOPSUR P DECOMP TEST BOPE WITH 4" TEST JT. - TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH; TESTS GOOD. - TEST BOTTOM AND TOP PIPE RAMS TO 250 PSI LOW AND 3,500 PSI HIGH; TESTS GOOD. 08:30 - 09:00 0.50 FISH P DECOMP INSTALL WEAR RING. 09:00 - 12:00 3.00 FISH P DECOMP PU BAKER PACKER MILLING BHA TO 322'. - MILLING BHA CONSISTS OF: 12:00 - 14:30 2.50 FISH P DECOMP RIH WITH MILLING BHA ON 4" DP SINGLES FROM THE PIPESHED FROM 322' TO 3,200'. - FILL PIPE EVERY 30 STANDS. Printed 12/9/2010 2:04:20PM ? t t t `� e a ;F- F �' f �. . � �, � t ° `-'� ��' �,a-� �- y Ql k h Af ilfGs"a A P ' t � Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 14:30 - 18:00 3.50 FISH N RREP 3,200.00 DECOMP EVACUATED RIG DUE TO H2S HIGH -LEVEL ALARM. - WHILE FILLING PIPE, WE ENCOUNTERED A HIGH -LEVEL H2S ALARM; MONITOR ABOVE SHALE SHAKERS REGISTERED 100 PPM. - DRILLER AND FLOOR HAND # 1 DONNED SCBA AND SECURED THE WELL BY SHUTTING IT IN WHILE ALL OTHER RIG AND THIRD -PARTY PERSONNEL ON THE RIG AND ON THE PAD MUSTERED IN THE SHOP, OUR SAFE- BRIEFING AREA. - ON TWO OCCASIONS SEPARATED BY 30 MINUTES, DRILLER AND SECOND RIG HAND USED HAND -HELD MONITORS/RADIOS TO CHECK THE RIG FOR PRESENCE OF H2S; NO GAS WAS ENCOUNTERED. - REMOVE AND REPLACE MONITOR OVER SHALE SHAKERS AS A PRECAUTIONARY MEASURE AND RETEST /RECALIBRATE ALL PERMANENT MONITORS ON RIG. - SEE TRACTION 2010 -IR- 3612780 FOR FURTHER DETAILS. 18:00 - 18:30 0.50 FISH N RREP 3,200.00 ' DECOMP AFTER VERIFYING SIDP AND SICP WERE ZERO PSI, OPENED ANNULAR PREVENTER. MONITORED WELL; WELL STATIC. - CBU -- 69 BBLS, 250 GPM, 490 PSI. - MONITORED WELL; WELL STATIC. 18:30 - 00:00 5.50 FISH P DECOMP RIH WITH MILLING BHA ON 4" DP SINGLES FROM THE PIPESHED FROM 3,200' TO 11,311'. - FILL PIPE EVERY 30 STANDS. - TAG 4 -1/2" TUBING STUMP AT 11,311'. PU WT 180K, SO WT 137K. - MW 8.5 PPG NACL BRINE IN AND OUT. 9/9/2010 00:00 - 01:00 1.00 FISH P DECOMP CIRCULATE SURFACE TO SURFACE. - PUMP 40 -BBL EP MUD LUBE PILL. - 377 BBLS, 410 GPM, 2,450 PSI. - SHUT -IN WELL AFTER CIRCULATING AND PUMPED THROUGH CHOKE TO FILL LINES AND POORBOY DEGASSER AND ENSURE ABILITY TO CIRCULATENERIFY VALVE ALIGNMENT BEFORE COMMENCING PACKER MILLING OPERATION. 01:00 - 06:00 5.00 FISH P DECOMP PACKER MILLING OPERATION. - 170 GPM, 470 PSI — OFF BOTTOM. - 132 GPM, 340 PSI -- ON BOTTOM. - 60 RPM. - 4K TQ OFF, 4 -8K TQ ON. - PU WT 175K, SO WT 140K, ROT WT 160K. - 10 -15K WOB. - AFTER MILLING THROUGH PACKER ELEMENTS, EXPERIENCED 56- BBL/HR LOSS RATE. - CONTINUE MILLING THROUGH BOTTOM SLIPS, BUT UNABLE TO VERIFY SLIPS RELEASE. Printed 12/9/2010 2:04:20PM - �. 11 *. � . f'`eS , „4,07” t ' i 'c` - c ��-' -.� ..�, �'� " �^` Common Well Name: S-41 "�� AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 08:00 2.00 FISH P DECOMP BULLHEAD 75 BBLS DOWN IA TO FLUSH JUNK AROUND PACKER. - 170 GPM, 2,000 PSI ICP, 2,020 PSI FCP. - MONITOR WELL; STATIC LOSS RATE 60 BBLS/HR. - RIH TO VERIFY THAT PACKER DID NOT MOVE DOWNHOLE WHILE BULLHEADING; PACKER DID NOT MOVE. 08:00 - 09:00 1.00 FISH P DECOMP SPOT 45 -BBL LCM PILL AT 11,318'. ■ - 160 GPM, 440 PSI. - MONITOR WELL; WELL STATIC. 09:00 - 12:00 3.00 FISH P DECOMP POH WITH PACKER MILLING BHA FROM ■ 11,318' TO 3,800'. - PU WT 95K, SO WT 90K. 12:00 - 14:00 2.00 FISH P DECOMP POH WITH PACKER MILLING BHA FROM 3,800' TO 322'. - MONITOR WELL; LOSS RATE REDUCE TO 3 -5 BBUHR. 14:00 - 15:30 1.50 FISH P DECOMP LD PACKER MILLING BHA FROM 322' TO SURFACE. - HOLD PJSM. RB 3 STANDS OF DCS. - LD BOOT BASKETS; BASKETS BROUGHT UP PACKER SHAVINGS AND 1 SS BAND. - CLEAN AND CLEAR RIG FLOOR. 15:30 - 16:30 1.00 FISH P ® DECOMP PU PACKER FISH SPEAR BHA TO 319'. 16:30 - 20:00 3.50 FISH P DECOMP RIH WITH PACKER FISH SPEAR BHA FROM 319' TO 11,229'. - WASH DOWN AT 3 BPM, 360 PSI. TAG FISH AT 11,316'. - PU WT 180K, SO WT 143K. - ENGAGED FISH AND SAW 100 PSI INCREASE IN PUMP PRESSURE. - PU TO 225K AND JAR LOOSE. - VERIFY FISH ON WITH SAME PUMP PRESSURE AS AFTER ENGAGING INTO FISH. 20:00 - 21:00 1.00 FISH P DECOMP CBU AFTER DROPPING 1 -7/8" DART. - OPEN PUMP -OUT SUB AT 1,900 PSI. - 255 BBLS, 8 BPM, 1,360 PSI. - MONITOR WELL AFTER CBU; STATIC LOSS RATE 35 BBUHR. 21:00 - 00:00 3.00 FISH P ■- DECOMP POH WITH PACKER FISH SPEAR BHA AND FISH FROM 11,318' TO 6,620'. - PUWT122K. 9/10/2010 00:00 - 02:30 2.50 FISH P DECOMP POH WITH PACKER FISH SPEAR BHA FROM 6,620' TO 319'. - MONITOR WELL; STATIC LOSS RATE 40 BBUHR. 02:30 - 06:00 3.50 FISH P DECOMP LD PACKER FISH SPEAR BHA TO SURFACE. - PJSM. - LD BHA. - RU TO LD FISH. - PUNCH TUBING ON FISH UNDER XN NIPPLE; TAILPIPE FULL OF SCALE. - BREAK OUT AND LD FISH. - RECOVER BAKER S-3 PACKER BODY AND TAIL PIPE ASSEMBLY. - RD TUBULAR HANDLING EQUIPMENT. - CLEAN AND CLEAR RIG FLOOR. Printed 12/9/2010 2:04:20PM tott ` A a mer P � ' . 7 � r � � ' • f' _ J . Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 07:30 1.50 FISH N WAIT DECOMP WAITING ON ORDERS FROM ANCHORAGE LEADERSHIP. - SERVICE TOP DRIVE. 07:30 - 08:30 1.00 CLEAN C DECOMP PU 7" CLEAN -OUT BHA TO 318'. 08:30 - 12:00 3.50 CLEAN C DECOMP RIH WITH 7" CLEAN -OUT BHA FROM 318' TO 10,475'. - FILL PIPE EVERY 30 STANDS. - PU WT 172K, SO WT 140K. 12:00 - 12:30 0.50 CLEAN C DECOMP RIH WITH 7" CLEAN -OUT ASSEMBLY FROM 10,475' TO 11,227'. - BREAK CIRCULATION AND ESTABLISH DRILLING PARAMETERS/SPRS AT 11,227'. - WASH DOWN FROM 11,227' TO 11,365'; TAG SCALE AT 11,365'. - 5 BPM, 665 PSI. - 80 RPM.: 3.5K TQ. - MW 8.4 PPG IN AND OUT. - PU WT 175K, SO WT 145K, ROT WT 160K. 12:30 - 22:00 9.50 CLEAN C DECOMP DRILL SCALE FROM 11,365' TO 11,906'. - DRILLING BREAK AT 11,906'; SUSPECT THAT WE STARTED TO DRILL BOTTOM PACKER AND DECIDED TO TRIP FOR PACKER MILLING _ - 5 BPM, 670 PSI. - 80 RPM. - 3-5K TQ. - 5 -7K WOB. - PU WT 180K, SO WT 147K, ROT WT 160K. - UTILIZE HI-VIS SWEEPS; SWEEPS BRINGING BACK HEAVY SCALE AND PARAFFIN. - MW 8.5 PPG IN AND OUT. - MONITOR WELL BEFORE POH; 30 BBUHR STATIC LOSS RATE. 22:00 - 00:00 2.00 CLEAN C DECOMP CIRCULATE 20 -BBL HI-VIS SWEEP SURFACE TO SURFACE AND SPOT 40 -BBL LCM PILL AFTER SEEING SWEEP BACK AT SURFACE. - 577 BBLS, 8 BPM, 1,335 PSI. - SEE HEAVY SCALE WITH SWEEP. 9/11/2010 00:00 - 05:00 5.00 CLEAN C DECOMP POH WITH 7" CLEAN -OUT BHA FROM 11,906' TO 318'. 05:00 - 05:30 0.50 CLEAN C DECOMP LD 7" CLEAN -OUT BHA FROM 318' TO SURFACE. 05:30 - 06:30 1.00 FISH P DECOMP PU BOTTOM PACKER MILLING BHA TO 359'. 06:30 - 11:00 4.50 FISH P DECOMP RIH WITH BOTTOM PACKER MILLING BHA FROM 359' TO 11,644'. - BREAK CIRCULATION EVERY 3,000'. 11:00 - 12:00 1.00 FISH P DECOMP CUT AND SLIP 126' OF DRILLING LINE. - SERVICE CROWN, BLOCKS, AND DRAWWORKS. Printed 12/9/2010 2:04:20PM •94hA1nCALASKA;B P 111V . � �� .�,:.ff �Z�� xp '� M � � '�` � d � � t t . Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Project: Y Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:00 - 13:00 1.00 FISH P DECOMP BREAK CIRCULATION AND ESTABLISH PARAMETERS. - CIRCULATE SURFACE TO SURFACE; 448 BBLS, 245 GPM, 745 PSI. - SPR @ 11,644' / 8,762' TVD #1 @2 BPM = 160 PSI / 3 BPM = 285 PSI, #2 @ 2 BPM = 160 PSI / 3 BPM = 280 PSI PUWT =185K /SOWT =145K /ROTWT= 162K. MW 8.4 PPG IN AND OUT. 13:00 - 17:30 4.50 FISH P DECOMP REAM IN THE HOLE AND TAG TOP OF BOTTOM PACKER AT 11,906' MD. MILL PACKER -4 BPM = 560 PSI ON, 445 PSI OFF. - 60 RPM - 5.5K TQ OFF; 8 -10.5K TQ ON. PUWT =185K /SO WT= 145K /ROTWT= 162K. - PUMP 2 HIGH -VIS (100+ SEC) SWEEPS DURING MILLING OPS AND 1 EP MUD LUBE PILL. MILL FROM 11,906' - 11,912'; AT 11,912' MD, STALLED PIPE AND PU PULLING 25K OVER; PU WT INCREASED 10K, SUSPECT TAIL PIPE WEDGED INTO WASHOVER PIPE. - PICKUP ABOVE UPPER LATERAL TO 11,860' MD. 17:30 - 18:00 0.50 FISH P DECOMP BULLHEAD 103 BBLS AT 6 BPM. - ICP AT 6 BPM = 2,060 PSI. - FCP AT 6 BPM = 1,920 PSI. FLOW CHECK WELL; WELL STATIC —NO FLOW. - OPEN WELL, LOSING FLUID AT 15 BPH. 18:00 - 19:30 1.50 FISH P DECOMP CBU. - 335 BBLS, 6 BPM, 800 PSI. - LOSSES INCREASED TO 40 BPH. - MONITOR WELL, LOSING FLUID, MW 8.4 PPG IN / OUT 19:30 - 00:00 4.50 FISH P DECOMP POH WITH BOTTOM PACKER MILLING BHA FROM 11,860' TO 3,650'. - LOSS RATE AT 30 - 40 BPH. 9/12/2010 00:00 - 03:00 3.00 FISH P DECOMP POH WITH BOTTOM PACKER MILL FROM 3,650' TO 350'. - 15K OVERPULL AT 2,417'. 03:00 - 04:30 1.50 FISH P DECOMP LD BOTTOM PACKER MILL BHA FROM 350'. - NO FISH, BUT BOTTOM PACKER PIECES STUCK INSIDE OF WASH PIPE. 04:30 - 05:30 1.00 FISH P DECOMP CLEAN TAR, SCALE, AND PACKER REMNANTS FROM BOOT BASKETS. - CLEAN AND CLEAR RIG FLOOR. 05:30 - 06:30 1.00 FISH C DECOMP PU/MU BOTTOM PACKER SPEAR BHA TO 319'. 06:30 - 11:30 5.00 FISH C DECOMP RIH WITH BOTTOM PACKER SPEAR BHA FROM 319' TO 11,875'. - PU WT 180K, SO WT 145K. 11:30 - 12:30 1.00 FISH C DECOMP CBU. - 270 BBLS, 330 GPM, 1,950 PSI. Printed 12/9/2010 2:04:20PM ' 1141ff %A.4,14- Common Well Name: S -41 AFE No Event Type: RE-ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3 -00W9R C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:30 - 13:30 1.00 FISH C DECOMP WASH DOWN FROM 11,875' TO 11,910'. - 3.5 BPM, 450 PSI. -TAG FISH AT 11,910'; SEE 150 PSI INCREASE. - O L . - JAR PU AND FISH F R E; 35K H VERPUL AVE POSITIVE INDICATION FISH ON WITH HIGHER PUMP PRESSURE. 13:30 - 14:30 1.00 FISH C DECOMP PPUTUMP0- OU ' AND DROP DART TO OPEN -PUMP -OUT SUB NETH , - CIRCULATE 375 BBLS 8 D BP 1,450 1965 PSI. PSI. - MONITOR WELL; SOME GAS BREAK -OUT IN BELL NIPPLE; NO INCREASE IN FLOW. 14:30 - 15:30 1.00 FISH C DECOMP A A TO BAL AROUND EMPT FISH ULLHE UNSUCCESSFUL. D 104 BB S TO FLUSH - PRESSURE UP TO 2,000 PSI AND HELD WITHOUT BLEED OFF. - B LED D P T,905'. MONITOR OFF WE LL; 40 USHED BPH STATIC FISH O LOS11S RATE. WORK K TTEMPT PIPE A SECOND AND PU TIME TO 11 TO BULLHEAD; PRESSURED UP AGAIN TOF 2,000 PSI AND HELD WITHOUT BLEED OFF. - BLED O FF AND RIH TO 11,906'. 15:30 - 16:00 0.50 FISH C DECOMP CONSULT WITH ANCHORAGE RIG TEAM. - MONITOR WELL; 42 BPH STATIC LOSS RATE. 16:00 - 17:00 1.00 FISH C DECOMP RIH RELEASE TT - CHASE TO PACKER TO FROM 11,920 WITH OM SO WT PACKER. 50K. - 10 TURNS TO RIGHT; WORKED TQ DOWN; FISH RELEASED. 17:00 - 18:00 1.00 FISH C DECOMP POH WITH BOTTOM PACKER SPEAR BHA TO 11,848' AND CBU. - 6 BPM, 830 PSI. - SPOT HI-VIS PILL AT 11,848'. - MONITOR WELL; 38 BPH STATIC LOSS RATE. - 8.4 PPG MW IN AND OUT. 18:00 - 23:00 5.00 FISH C DECOMP POH WITH BOTTOM PACKER SPEAR BHA FROM 11,848' TO 319'. - PU WT 192K, SO WT 140K. - MONITOR WELL; 40 BPH STATIC LOSS RATE. - 8.4 PPG MW IN AND OUT. 23:00 - 00:00 1.00 FISH C DECOMP LD BOTTOM PACKER SPEAR BHA FROM 319'. 9/13/2010 00:00 - 01:30 1.50 FISH C DECOMP PU /MU BOTTOM PACKER MILLING BHA TO 359'. 01:30 - 05:30 4.00 FISH C DECOMP RIH , WITH BOTTOM PACKER MILLING BHA TO 11906'. 05:30 - 07:00 1.50 FISH C DECOMP ESTABLISH PARAMETERS AND R SURFACE TO SURFACE AT 11,906CI'. CULATE - 397 B A B C 330 GPM, 1,287 PS - PU WT 185K, SO WT 145K. - 8.4 PPG MW IN AND OUT. Printed 12/9/2010 2:04:20PM • Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 07:00 - 11:00 4.00 FISH C DECOMP MILL BOTTOM PACKER. - RIH AND TAG TOP OF FISH AT 11,916'. - 5K TQ OFF, 8-11K TQ ON. - 168 GPM, 450 PSI. - PU WT 185K, SO WT 140K, ROT WT 160K. - MW 8.4 PPG IN AND OUT. . MILLED DOWN TO 11,918' AND THEN UNABLE TO MILL. - ATTEMPT TO WEDGE FISH IN BURN SHOE; UNSUCCESSFUL. - ATTEMPT TO MILL DOWN AGAIN; UNSUCCESSFUL. 11:00 - 16:00 5.00 FISH C DECOMP POH WITH BOTTOM PACKER MILL FROM 11,9.18' TO 359'. - MONITOR WELL; 28 BPH STATIC LOSS RATE. 16:00 - 17:30 1.50 FISH C DECOMP ` LD BOTTOM PACKER MILL BHA FROM 359'. - RECOVERED HEAVY PARAFFIN AND PACKER SHAVINGS FROM BOOT BASKETS. - CLEAN AND CLEAR RIG FLOOR. 17:30 - 18:30 1.00 FISH C DECOMP" ; PU PACKER SPEAR BHA TO 319'. 18:30 - 22:30 4.00 FISH C DECOMP RIH WITH PACKER SPEAR BHA FROM 319' TO 11,875'. - PU WT 185K, SO WT 145K. 22:30 - 00:00 1.50 FISH C DECOMP CIRCULATE. - PUMP 100 -BBL, 140 DEGREE F BARAKLEAN SOAP PILL; LET SOAK FOR 30 MINUTES. - FLUSH PIPE WITH 155 -BBL 8.4 PPG NACL BRINE. 6 BPM, 1,160 PSI. 9/14/2010 00:00 - 00:30 0.50 FISH C DECOMP CIRCULATE BARAKLEAN SOAP PILL OUT OF THE HOLE. - 155 BBLS, 306 GPM, 1,640 PSI. 00:30 - 02:00 1.50 FISH C DECOMP RIH FROM 11,875' TO 11,916'. - ENGAGE BOTTOM PACKER FISH; POSITIVE PRESSURE INDICATION THAT FISH WAS ON. - PUSH FISH TO BOTTOM AT 12,209' - PUWT185K,SOWT145K. 02:00 - 02:30 0.50 FISH C DECOMP POH WITH BOTTOM PACKER FISH FROM 12,209' TO 11,850'. 02:30 - 03:00 0.50 FISH C DECOMP CLOSE ANNULAR PREVENTER AND BULLHEAD DOWN IA. - 75 BBLS, 5 BPM, 2,015 PSI. 03:00 - 04:30 1.50 FISH C DECOMP CBU. - DROP DART AND OPEN PUMP -OUT SUB AT 1,896 PSI. - 330 GPM, 1,220 PSI. - MONITOR WELL; 35 BPH STATIC LOSS RATE. 04:30 - 10:30 6.00 FISH C DECOMP POH WITH PACKER SPEAR BHA FROM 11,793' TO 319'. - PU WT 160K, SO WT 120K. 10:30 - 11:30 1.00 FISH C DECOMP LD PACKER SPEAR BHA AND FISH FROM 319'. - RECOVERED MILLED UP BAKER ML PACKER REMNANTS, 4 -1/2" XO PUP JT, 4 -1/2" PUP JT, 4 -1/2" XN NIPPLE,4 -1/2" PUP JT, AND 4 -1/2" WLEG. 11:30 - 12:00 0.50 FISH C DECOMP CLEAN AND CLEAR RIG FLOOR. Printed 12/9/2010 2:04:20PM t °z ;` c .£ vY t - y ` t 6-A6iZ.r S't s L71' % 3 k. ,'- ` r Operation Summary Repo d Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual ©64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:00 - 13:00 1.00 BOPSUR P DECOMP PULL WEAR BUSHING AND SET TEST PLUG. - RU TEST EQUIPMENT. 13:00 - 17:30 4.50 BOPSUR P DECOMP TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 3,500 PSI HIGH WITH 4" AND 4 -1/2" TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4" TEST JOINT. ALL TESTS GOOD. AOGCC REP CHUCK SCHEVE WAIVED WITNESS TO THE TEST ON 09/12/2010. TEST WITNESSED BY BP WSL DICK MASKELL AND NAD TOOLPUSHER CHRIS WEAVER. 17:30 - 18:30 1.00 BOPSUR P DECOMP RD TEST EQUIPMENT AND LINES, PULL TEST PLUG, AND INSTALL WEAR BUSHING. 18:30 - 22:00 3.50 CLEAN P DECOMP PU 7" CLEAN -OUT AND SCRAPER BHA TO 444'. - HOT SHOT OUT NECESSARY CROSSOVERS TO RUN 7 "CASING SCRAPER TO 100' ABOVE 7" CASING WINDOW. - SERVICE TOP DRIVE. MONITOR WELL; 26 BPH STATIC LOSS - RATE. 22:00 - 00:00 2.00 - -- CLEAN P DECOMP RIH WITH 7" CLEAN -OUT AND SCRAPER BHA FROM 444' TO 5,334'. - PU WT 95K, SO WT 90K. 9/15/2010 00:00 - 04:30 4.50 CLEAN P DECOMP RIH AND DRILL DOWN WITH 7" CLEAN - OUT /SCRAPER BHA TO 11,939'. - 225 GPM, 815 PSI. - 45 RPM. - 6.5K TQ ON. - DRILLING COMMENCED AT 11,934' AND WAS VERY SLOW TO 11,939'; ALL INDICATIONS POINT TO DRILLING MORE HEAVY SCALE. - AFTER FIRST BU, SHUT DOWN PUMPS AND SAW GAS BREAKING OUT VIGOROUSLY AT SURFACE; MONITORED WELL; WELL WAS STILL LOSING FLUID, BUT VIGOROUS GAS BREAK -OUT DID NOT SUBSIDE; DECISION MADE BY NIGHT WSL AND TOURPUSHER TO SHUT IN THE WELL; PROPER NOTIFICATIONS MADE (TRACTION 2010 -IR- 3618028). - 8.4 PPG MW IN AND OUT. 04:30 - 06:30 2.00 CLEAN N DPRB 11,939.00 DECOMP CBU THROUGH SUPER CHOKE TO POOR -BOY DEGASSER. - SICP AND SIDPP 0 PSI. - 3 BPM, 280 PSI (SAME AS SPR TAKEN BEFORE SHUTTING WELL IN). - AFTER CIRCULATION, CHECKED FOR FLOW FROM CHOKE; THERE WAS NONE. - OPENED ANNULAR PREVENTER. 06:30 - 08:00 1.50 CLEAN P DECOMP DISPLACE WELL TO CLEAN FRESHWATER. - 280 GPM, 1,200 PSI. - WHILE CIRCULATING, ABLE TO GET PAST 11,939'. - MW 8.3+ PPG IN AND OUT. 08:00 - 09:00 1.00 CLEAN P DECOMP RIH WITH 7" CLEAN -OUT BHA FROM 11,939' TO 12,229'. - PU WT 185K, SO WT 145K. Printed 12/9/2010 2:04:20PM ' III 33 I �Df11Ct1� IC 145h �IIII� F'� 10 bf, p ration Summ Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 11:00 2.00 CLEAN P DECOMP PUMP 290 -BBL, 140 DEGREE F BARAKLEAN PILL. - LET SOAK 30 MINUTES. 11:00 - 12:30 1.50 CLEAN P DECOMP CIRCULATE OUT BARAKLEAN PILL. - 225 GPM, 883 PSI. - MONITOR WELL; 26 BPH STATIC LOSS RATE. - MW 8.3 PPG IN AND OUT. 12:30 - 19:00 6.50 CLEAN P DECOMP POH WITH 7" CLEAN -OUT BHA FROM 12,229' TO 446'. - 35K OVERPULL AND SWABBING AT 11,735'. - WORK TIGHT SPOT 3X. - INTERMITTANT SWABBING THROUGHOUT TRIP. - EXTREMELY HEAVY PARAFFIN ON TOOL JTS AND TUBULARS FROM LAST 6 STANDS OF 4" DP THROUGH LD BHA. 19:00 - 21:30 2.50 CLEAN P DECOMP LD 7" CLEAN -OUT BHA FROM 446'. - MONITOR WELL; 25 BPH STATIC LOSS RATE. - FUNCTION TEST RAMS. - CLEAN AND CLEAR RIG FLOOR. - EMPTY BOOT BASKETS. 21:30 - 22:30 1.00 BOPSUR P DECOMP PULL WEAR BUSHING, RU TEST EQUIPMENT, AND SET TEST PLUG. 22:30 - 23:00 0.50 BOPSUR P DECOMP TEST ANNULAR PREVENTER WITH 4" TEST JT. - TEST TO 250 PSI LOW AND 2,500 PSI HIGH; TEST GOOD. - TEST ACCOMPLISHED DUE TO USING ANNULAR PREVENTER IN WELL CONTROL SITUATION THIS MORNING. - AOGCC REP BOB NOBLE WAIVED WITNESS ON 15 SEP 10. 23:00 - 23:30 0.50 BOPSUR P DECOMP RD TEST EQUIPMENT, PULL TEST PLUG, AND SET WEAR BUSHING. - TEST PLUG COMPLETELY COVERED WITH HEAVY PARAFFIN. 23:30 - 00:00 0.50 CLEAN N DPRB 12,229.00 DECOMP PU 2ND 7" CLEAN -OUT BHA TO 50'. - 38 BPH STATIC LOSS RATE. - MW 8.3 PPG. 9/16/2010 00:00 - 01:00 1.00 CLEAN N DPRB 12,229.00 DECOMP PU 2ND 7" CLEAN -OUT BHA FROM 50' TO 435'. 01:00 - 02:00 1.00 CLEAN N DPRB 12,229.00 DECOMP RIH WITH 2ND 7" CLEAN -OUT BHA FROM 435' TO 3,145'. 02:00 - 02:30 0.50 CLEAN P DECOMP SLIP AND CUT 150' OF DRILLING LINE. 02:30 - 05:30 3.00 CLEAN N DPRB 12,229.00 DECOMP RIH WITH 2ND 7" CLEAN -OUT BHA FROM 3,145' TO 11,100'. - FILL EVERY 3,000' UNTIL 11,100'. 05:30 - 08:00 2.50 CLEAN N DPRB 12,229.00 DECOMP WASH TO BOTTOM FROM 11,100' TO 12,223'. - PU WT 185K, SO WT 145K, ROT WT 160K. - 3 BPM, 280 PSI. - 60 RPM. 08:00 - 08:30 0.50 CLEAN N DPRB 12,229.00 DECOMP CBU. - 215 GPM, 760 PSI. 08:30 - 10:30 2.00 CLEAN N DPRB 12,229.00 DECOMP PUMP 25 -BBL, HI-VIS SPACER FOLLOWED BY A 58 -BBL, 90 DEGREE F DIESEUBARASCRUB PILL. - CHASE DOWN 4" DP WITH 142 BBLS OF FRESHWATER. Printed 12/9/2010 2:04:20PM orth - ALAo $P 7 ge t1� E - � Op era t iOra $Umma y Report Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual ©64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10:30 - 11:30 1.00 CLEAN N DPRB 12,229.00 DECOMP CLOSE TOP PIPE RAMS AND LINE UP TO BULLHEAD DOWN IA. - BULLHEAD 600 BBLS, 140 DEGREE F FRESHWATER. - 340 GPM, 2,450 PSI. 11:30 - 12:30 1.00 CLEAN N DPRB 12,229.00 DECOMP SHUT DOWN PUMPS AND ALLOW PRESSURE TO STABILIZE. MONITOR WELL; 0 PSI SHUT -IN PRESSURE. 12:30 - 14:00 1.50 CLEAN N RREP 12,229.00 DECOMP CHANGE OUT KOOMEY HYDRAULIC LINE DUE TO HOSE FAILURE. 14:00 - 17:30 3.50 CLEAN N DPRB 122,229.00 DECOMP . OPEN SUPER CHOKE AND CIRCULATE 1.5 BUS THROUGH CHOKE MANIFOLD AND POOR -BOY DEGASSER. 508 BBLS, 3 BPM, 260 PSI. FLOW CHECK; NO FLOW. - OPEN TOP PIPE RAMS. - MONITOR WELL; 28 BPH STATIC LOSS RATE. - MW 8.3 PPG IN AND OUT. 17:30 - 19:00 1.50 CLEAN N DPRB 12,229.00 DECOMP PUMP 30 -BBL, HI-VIS SWEEP AND CIRCULATE IT SURFACE TO SURFACE. 250 GPM, 970 PSI. - PILL BROUGHT NOTHING BACK TO SURFACE. - MONITOR WELL FOR 15 MINUTES; 27 BPH STATIC LOSS RATE. - 8.3 PPG MW IN AND OUT. 19:00 - 00:00 5.00 CLEAN N DPRB 12,229.00 _ DECOMP POH WITH 2ND 7" CLEAN -OUT BHA FROM 12,223' TO 1,187'. - PU WT 185K, SO WT 140K. - 30K OVERPULL AT DEPTHS OF 11,862', 11,785', 11,754', 11,700', AND 11,690'. - WORKED ALL TIGHT AREAS. 9/17/2010 00:00 - 01:30 1.50 CLEAN N DPRB 12,229.00 DECOMP LD 2ND 7" CLEAN -OUT BHA TO SURFACE. - "CLEAN AS A WHISTLE' — NO PARAFFIN NOTED. 01:30 - 02:30 1.00 CLEAN N DPRB 12,229.00 DECOMP CLEAN AND CLEAR RIG FLOOR. - LD ALL BAKER FISHING/CLEAN -OUT TOOLS DOWN BEAVALATOR. 02:30 - 03:00 0.50 PXA P DECOMP PU 7" HES CEMENT RETAINER. 03:00 - 08:00 5.00 PXA P DECOMP RIH WITH 7" CEMENT RETAINER ON 12 EA 4" DP SINGLES FROM THE PIPESHED AND STANDS FROM THE DERRICK TO 12,180'. 08:00 - 10:30 2.50 PXA P DECOMP RIH AND SET 7" CEMENT RETAINER ON DEPTH AT 12,190'. - ESTABLISH CIRCULATING PRESSURES AT 4 BPM, 370 PSI UNSTUNG, 1,393 PSI STUNG IN. - RU TO SQUEEZE CEMENT. - SET DOWN 20K ON RETAINER. Printed 12/9/2010 2:04:20PM north Am r16 A i r ' 4 F � � Operation Sun nar Report �; < f .. - , :- w E. , i , . s Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10:30 - 12:30 2.00 PXA P DECOMP LOWER IVISHAK LATERAL SQUEEZE CEMENT JOB. - SWS CEMENTERS PUMP 10 BBLS OF 12 PPG MUDPUSH II. - PRESSURE TEST SURFACE LINES TO 4,000 PSI; TEST GOOD. - SWS CEMENTERS PUMP 163 BBLS 15.8 PPG CLASS G CEMENT. - 854 SKS; 1.16 CU FT /SK YIELD. -4 BPM , 1,280 PSI. - SWAP OVER TO RIG PUMPS AND DISPLACE WITH 129 BBLS OF FRESHWATER AT 4 BPM, ICP 1,300 PSI, FCP 2,330 PSI. CEMENT IN PLACE AT 1213 HRS. - MW IN AND OUT 8.3 PPG. 12:30 - 13:30 1.00 PXA P DECOMP CBU. UNSTING FROM CEMENT RETAINER, DROP 5" FOAM DRILL PIPE WIPER BALL, AND MU TOP DRIVE TO 4" DP. - RD CEMENT LINES. - 460 BBLS, 8 BPM, 1,335 PSI. - NO CEMENT SEEN AT SURFACE. 8.3 PPG MW IN AND OUT. 13:30 - 14:00 0.50 PXA P DECOMP MONITOR WELL - 8 BPH STATIC LOSS RATE. - BLOW DOWN TOP DRIVE. 14:00 - 19:00 5.00. PXA P DECOMP POH WITH CEMENT RETAINER RUNNING TOOL FROM 12,185' TO SURFACE. 19:00 - 20:00 1.00 PERF P DECOMP MU PERF GUN, FIRING HEAD, AND XOS. - MONITOR WELL; 6 BPH STATIC LOSS RATE. 20:00 - 00:00 4.00 PERF P DECOMP RIH WITH PERF GUN ON 4" DP STANDS TO 9,623'. 9/18/2010 00:00 - 01:30 1.50 PERF P DECOMP RIH WITH PERF GUN ON 4" DP STANDS FROM 9,623' TO 12,190'. - TAG UP ON CEMENT RETAINER AND PU 5' TO 12,185'. - PU WT 180K, SO WT 145K. 01:30 - 02:00 0.50 PERF P DECOMP PERFORATE 7" CASING FROM 12,175' TO 12,185'. - 4.5 ", 5 SPF, 72 DEGREE PHASING, 4505 PJ GUN. - ESTABLISH CIRCULATING RATE AT 3 BPM, 435 PSI. - DROP BALL AND PRESSURE UP TO 1,985 PSI. - FIRE GUN AFTER PRESSURING UP AND FEEL GOOD SURFACE INDICATION OF GUNS FIRING. - POH TO ABOVE PERFS AT 12,150'. - MONITOR WELL; 5 BPH STATIC LOSS RATE. 02:00 - 03:00 1.00 PERF P DECOMP CBU. - 210 GPM, 1,089 PSI. - MONITOR WELL; 5 BPH STATIC LOSS RATE. 03:00 - 03:30 0.50 PERF P DECOMP SLIP AND CUT 79' OF DRILLING LINE. 03:30 - 08:30 5.00 PERF P DECOMP POH WITH PERF GUN FROM 12,150' TO 20'. - PU WT 180K, SO WT 145K. - 8.3 PPG MW IN AND OUT. 08:30 - 09:00 0.50 PERF P DECOMP LD FIRED PERF GUNS. - ALL SHOTS FIRED. - CLEAN AND CLEAR RIG FLOOR. Printed 12/9/2010 2:04:20PM �t i4 1Y 18(IC13 �S �P • , � � � ' ge p 28 `'' x. '=-rte '� 6-� , '4444' 441: � '€ .:.. -mp4444, S ummary 444, _ ' ; 44,44e44 4 Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 11:00 2.00 PXA P DECOMP RU E -LINE TO RIH WITH CCL AND 7" CEMENT RETAINER. 11:00 - 13:30 2.50 PXA P DECOMP RIH WITH E- LINE/CCL AND 7" CEMENT RETAINER. SET CEMENT RETAINER AT 12,029' ELM. 13:30 - 15:30 2.00 PXA P DECOMP ` POH E -LINE FROM 12,029'. 15:30 - 16:30 1.00 PXA P DECOMP RD E -LINE. 16:30 - 20:00 3.50 PXA P DECOMP MU HES 7" CEMENT RETAINER STINGER AND RIH ON 4" DP STANDS TO 12,012'. - PU WT 180K, SO WT 142K. 20:00 - 22:00 2.00 PXA P DECOMP ATTEMPTED 7" X OH ANNULUS CEMENT SQUEEZE. RU CEMENT LINES. - ESTABLISH CIRCULATION RATES; 2 BPM, 128 PSI, 3 RETURNS; 4 BPM, 450 PSI, 24 RETURNS; AND 6 BPM, 962 PSI, 37 RETURNS. STING INTO 7" CEMENT RETAINER AT 12,021' WITH 15K DOWN WEIGHT AND CONFIRM WITH PUMP PRESSURE BEFORE AND AFTER STINGING IN. - STING IN AND ATTEMPT TO ESTABLISH INJECTION RATES X 3; PRESSURED UP TO 2,450 PSI WITH 1.5 BBLS, 3,080 PSI WITH 1.9 BBLS, AND 2,600 PSI WITH 1.8 BBLS RESPECTIVELY ; EACH ATTEMPT, PRESSURE HELD AND NO BREAKDOWN WAS EVIDENT. - AFTER EACH INJECTION ATTEMPT, UNSTING AND CIRCULATE AT PREVIOUSLY ESTABLISHED CIRCULATION RATES EACH TIME. - TAGGED UP ON RETAINER AND STACKED OUT UPON STINGING IN EXACTLY THE SAME MANNER EACH TIME. - THERE WERE NO RETURNS NOTED IN STACK WHILE STUNG IN AND ATTEMPTING TO INJECT. 22:00 - 23:00 1.00 PXA P DECOMP BLEED PRESSURE AND CONSULT WITH TOWN ENGINEER FOR WAY AHEAD. - MONITOR WELL; 5.5 BBUHR STATIC LOSS RATE. - 8.3 PPG MW IN AND OUT. 23:00 - 00:00 1.00 PXA P DECOMP UNSTING FROM 7" CEMENT RETAINER AT 12,021' AND PU TO 11,945'. - RD AND BD CEMENT LINES. 9/19/2010 00:00 - 02:00 2.00 PXA P DECOMP DUMP 50' OF 20/40 MESH SAND ON 7" CEMENT RETAINER SET AT 12,021'. - DUMP IN HOPPER AT 5 -7 MIN /50# SACK AND MIX WITH WATER IN HOPPER TO FORM A SLURRY. 02:00 - 02:30 0.50 PXA P DECOMP PU TO 11,915' AND LET SAND DROP IN 4" DP. 02:30 - 03:30 1.00 PXA P DECOMP CIRCULATE 1 4" DP VOLUME TO CLEAR SAND FROM 4" DP ABOVE 7" CASING WINDOW AT 11,861'. - 125 BBLS, 2 BPM, 115 PSI. 03:30 - 07:30 4.00 PXA P DECOMP POH WITH 7" CEMENT RETAINER STINGER FROM 11,861' TO SURFACE. 07:30 - 08:30 1.00 PXA P DECOMP MU 7" CEMENT RETAINER. 08:30 - 09:00 0.50 PXA P DECOMP RIH WITH 7" CEMENT RETAINER TO 2,921'. Printed 12/9/2010 2:04:20PM merlca ALASt�A BR �age�dc:fzr ' e z ., mom -"`' x L'� era �+ um ary Report n, .-.. Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 16:00 7.00 PXA N MISC 2,921.00 DECOMP FORCE MAJEURE EVACUATION WITH CREWS. - SHUT IN WELL USING ANNULAR PREVENTER. R AL P EVACUATED D RIG RIG AND AND S -PAD SHUT OFF TO CC-2A L OWER. AND THEN KUSKOKWIM CAMP DUE TO GAS LEAK AT SKID 57 ON S PAD. WAITED. FOR PERMISSION FROM PAD OPERATOR TO RETURN TO PAD. 16:00 - 17:30 1.50 PXA N MISC 2,921.00 DECOMP FORCE MAJEURE EVACUATION WITH CREWS. RETURNED TO RIG. - CHECK RIG AND ALL OUT BUILDINGS FOR GAS PACKS NR - RESTORE WITH RIG AIR POWER; A ALL D GAS STEA AIR, S. AND HYDRAULICS RESTORED. - CHECK SIDPP AND SICP; BOTH ZERO PRESSURE. OPEN WELL AND FILL WITH 31 BBLS OF 8.3 PPG WATER. 17:30 - 22:00 4.50 PXA P DECOMP R WI 7" MEI ON 4" DP STANDS TI FROM CE 2,921NT ' TO RETA 11,692NER '. SFT RFTAINFR AT 11,RQ7' 5r - UNSTING. 22:00 - 23:00 1.00 PXA P DECOMP RU CEMENT LINES. I et 23:00 - 23:30 0.50 PXA P DECOMP PRESSURE TEST 7" E - TEST TO 3,000 PSI FOR CEMENT 20 MINUTES RETAIN WHILE CONDUCTING PJSM FOR CEMENT JOB; TEST GOOD — ROCK SOLID. - USED TOP PIPE RAMS FOR TEST. 23:30 - 00:00 0.50 PXA P DECOMP ESTABLISH CIRCULATION RATES FOR CEMENT JOB. - 2 BPM, 140 PSI. - 4 BPM, 463 PSI. - 6 BPM, 965 PSI. - 8.3 PPG MW IN AND OUT. 9/20/2010 00:00 - 02:00 2.00 PXA P DECOMP STING INTO 7" CEMENT RETAINER AND TRY TO ESTABLISH INJECTION RATE. - PUMP AT 2 BPM AND PRESSURED UP TO 2,000 PSI AND HELD. - TEMPTED SEVERAL M, WORKING IN AND AT OUT OF THE STINGER TI , TO ES ESTABLISH INJECTION RATE, BUT PRESSURED UP AND HELD EACH TIME. - HES PACKER HAND CONSULTED WITH THEIR TOWN AND SOME DIFFERENT STRATEGIES WERE DISCUSSED TO BE ABLE TO PUMP. - FINALLY WASHED DOWN AT 1/2 BPM WHILE STINGING INTO RETAINER AND WERE ABLE TO PUMP WITHOUT IMMMEDIATE PRESSURE SPIKE. - INJECTION RATES OF 2 BPM, 890 PSI AND 4 BPM, 1,450 PSI. Printed 12/9/2010 2:04:20PM A W Y 40 e . Q �t#. erjc? LAS RP perat� �a n rar� Repot Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:00 - 04:00 2.00 PXA P DECOMP UPPER SAG RIVER LATERAL CEMENT SQUEEZE. - PUMPED 14 BBLS 12 PPG MUD PUSH II AT 4 BPM. - PRESSURE TESTED SURFACE LINES TO 4,000 PSI; TEST GOOD. - PUMPED 262 BBLS 15.8 PPG CLASS r CEMENT AT 4 BPM. -1,244 SKS, 1.16 CU FT /SK YIELD. - DISPLACED WITH 124 BBLS OF 8.3 PPG WATER. - ICP 930 PSI AT 4 BPM, FCP 2,575 PSI AT 4 BPM. CEMENT IN PLACE AT 0344 HRS. 04:00 - 05:30 1.50 PXA P DECOMP PU TO 11,660', BREAK OFF CEMENT HEAD, DROP FOAM BALL, AND MU TOP DRIVE. - CIRCULATE SURFACE TO SURFACE. - 330 GPM, 1,281 PSI. - NO CEMENT SEEN AT SURFACE. - MONITOR WELL; WELL STATIC. 05:30 - 09:00 3.50 PXA P DECOMP POH WITH 7" CEMENT RETAINER STINGER FROM 11,660' TO SURFACE. 09:00 - 09:30 0.50 PXA P DECOMP CLEAN AND CLEAR RIG FLOOR. 09:30 - 11:00 1.50 CLEAN P DECOMP PU CEMENT CLEAN -OUT BHA TO 308'. 11:00 - 14:00 3.00 CLEAN P DECOMP RIH WITH CEMENT CLEAN -OUT BHA FROM 308' TO 7,458'. 14:00 - 16:00 2.00 CLEAN P DECOMP BOP DRILLS WITH DAVE GUESS' CREW. - D1 (KICK WHILE TRIPPING) - D5 (STRIPPING) - D6 (WELL KILL) - ALL CREW MEMBERS REFAMILIARIZED WITH SUPER CHOKE OPERATION. 16:00 - 17:30 1.50 CLEAN P DECOMP RIH WITH CEMENT CLEAN -OUT BHA FROM 7,458' TO 11,313'. - PU WT 180K, SO WT 145K. 17:30 - 19:00 1.50 WHSUR P DECOMP MU AND RIH WITH CEMENT CLEAN -OUT BHA ON RTTS TO 35'. - BIT DEPTH 11,360'. - LD RTTS RUNNING TOOL. - PRESSURE TEST RTTS TO 3,500 PSI FOR 10 MINUTES; TEST GOOD. 19:00 - 22:00 3.00 WHSUR P DECOMP 7" PACK -OFF CHANGE OUT. - PULL WEAR BUSHING - BOLDS. - PULL 7" PACK -OFF. - INSTALL NEW 7" PACK -OFF. - RILDS. - PRESSURE TEST PACK -OFF TO 500 PSI LOW FOR 5 MINUTES AND 5,000 PSI HIGH FOR 30 MINUTES; TESTS GOOD. 22:00 - 22:30 0.50 BOPSUR P DECOMP PU TEST TOOLS AND RU TO TEST BOPE. Printed 12/9/2010 2:04:20PM latch Am l ALASKA B k z T; A ge * � z (3 erati�on Summary eport . it -"" s ,.,'f' r � ;. 3` € M *e14.a y a .v ', :a.. : .. , Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 22:30 - 00:00 1.50 BOPSUR P DECOMP TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 4,000 PSI HIGH WITH 4" AND 4 -1/2" TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4" TEST JOINT. - ALL TESTS GOOD. AOGCC REP BOB NOBLE WAIVED WITNESS TO THE TEST ON 09/20/2010. TEST WITNESSED BY BP WSL RAYMOND PLATT AND NAD TOURPUSHER BIFF PERRY. 9/21/2010 00:00 - 02:30 2.50 BOPSUR P DECOMP CONTINUE TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 4,000 PSI HIGH WITH 4" AND 4 -1/2" TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4" TEST JOINT. - ALL TESTS GOOD.'' AOGCC REP BOB NOBLE WAIVED WITNESS TO THE TEST ON 09/20/2010. TEST WITNESSED BY BP WSL RAYMOND PLATT AND NAD TOURPUSHER BIFF PERRY. 02:30 - 03:30 1.00 BOPSUR P DECOMP RD TEST EQUIPMENT AND LINES, PULL TEST PLUG, AND INSTALL WEAR BUSHING. 03:30 - 04:00 0.50 WHSUR P DECOMP POH /LD RTTS. 04:00 - 04:30 0.50 CLEAN P DECOMP RIH WITH 7" CEMENT CLEAN -OUT BHA FROM 11,242' TO 11,692'. 04:30 - 12:00 7.50 CLEAN N DFAL 11,692.00 DECOMP ATTEMPT TO PRESSURE TEST 7" CASING TO 4000 PSI FOR 30 MIN. TEST FAILED, LOST 800 PSI IN 30 MIN. BLEED DOWN AND CHECK SURFACE EQUIPMENT. LOCK DOWN SCREW LEAKING. REPLACE LOCK DOWN SCREW. RE -TEST AND FAILED AT SAME LOSS RATE. CHECK SURFACE EQUIPMENT AND SERVICE ALL VALVES AND RE -TEST. FAILED AT SAME LOSS RATE. BLOW DOWN LINES AND CONSULT WITH TOWN 12:00 - 16:30 4.50 CLEAN N DFAL 11,692.00 DECOMP POOH FROM 11689' MD TO BHA 16:30 - 18:00 1.50 CLEAN N DFAL 11,692.00 DECOMP LD CLEANOUT BHA. SET BACK 3 STANDS, LD JARS, BOOT BASKETS, BIT SUBFLOAT SUB AND BIT. CLEAN PARRAFIN FROM BOOT BASKETS. 18:00 - 19:00 1.00 CLEAN N DFAL 11,692.00 DECOMP PRESSURE TEST 7" CASING TO 4000 PSI. LOST 350 PSI IN 14 MIN. BLEED PRESSURE. 19:00 - 23:00 4.00 CLEAN N DFAL 11,692.00 DECOMP MU RTTS AND RIH TO 5844' 23:00 - 00:00 1.00 CLEAN N DFAL 11,692.00 DECOMP SET RTTS WITH ELEMENTS AT 5840' MD. 105K PUW, 93 SOW. PRESSURE TEST 7" CASING FROM 5840' TO SURFACE TO 4000 PSI FOR 10 MIN. LOST 9 PSI. PRESSSURE TEST 7" CASING FROM 5840' TO TOP OF FAST DRILL PLUG AT 11,692' MD TO 4000 PSI. LOST 388 PSI IN 10 MIN. 9/22/2010 00:00 - 04:00 4.00 CLEAN N DFAL 11,692.00 DECOMP RIH WITH RTTS FROM 5840' TO 11675' MD. 170K PUW, 140K SOW Printed 12/9/2010 2:04:20PM p• rth AA ft1erica ALASKA BP age f ) -�* , :s � � ,S�a � . � cam'. `11-1 - r-e POLL Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 06:00 2.00 CLEAN N DFAL 11,692.00 DECOMP SET RTTS AND TEST FROM 11670' MD TO SURFACE TO 4000 PSI FOR 10 MIN. LOST 7 PSI. RELEASE RTTS AND RIH TO 11692' MD AND TAG FAST DRILL SET RTTS AT 11683' MD. TEST 7" CASING FROM ABOVE TO 4000 PSI FOR 30 MIN. LOST 12 PSI IN THE FIRST 15 MIN AND 4 PSI IN THE SECOND 15 MIN. TEST 7" CASING FROM 11683' TO 11692' MD AND FAST DRILL PLUG BELOW RTTS. LOST 314 PSI IN 5 MIN 06:00 - 10:30 4.50 CLEAN N DFAL 11,692.00 DECOMP POOH FROM 11692' TO SURFACE. LD RTTS. TRACES OF PARAFFIN ON RTTS 10:30 - 11:00 0.50 CLEAN P DECOMP PICK UP CLEAN OUT BHA AND RIH TO 308' MD 11:00 - 15:30 4.50 CLEAN P DECOMP RIH FROM 308' TO 11595' MD 180K PUW, 145K SOW 15:30 - 16:00 0.50 CLEAN P DECOMP CUT AND SLIP 148' OF DRILLING LINE 16:00 - 16:30 0.50 CLEAN P DECOMP SERVICE TOP DRIVE AND CROWN 16:30 - 17:00 0.50 CLEAN P DECOMP SLOW PUMP RATES TAKEN WASH DOWN FROM 11595' TO TAG FASDRILL AT 11692' MD. 250 GPM, 922 PSI 17:00 - 20:00 3.00 CLEAN P DECOMP DRILL FASDRILL PLUG FROM 11692' TO 11695' MD. WASH DOWN/NO CEMENT FROM 11695' TO 11805' MD. DRILL CEMENT FROM 11805' TO 11890' MD. NO CEMENT FROM 11890' TO 11905' MD. DRILL CEMENT FROM 11905' TO 11920' MD. 250 GPM, 950 PSI ON, 924 PSI OFF 50 RPM, 5K TQ ON, 4K TQ OFF 186K PUW, 142K SOW, 160K RTW 20:00 - 22:30 2.50 CLEAN P DECOMP PU TO 11874' MD. 8.4 PPG MW IN AND OUT. PERFORM FIT TO 812 PSI AT 8897' ND. 10.1 PPG EMW 22:30 - 23:30 1.00 CLEAN P DECOMP CIRCULATE AND RECIPRICATE HI-VIS SWEEP FROM 11877' TO 11783' MD. 513 GPM, 80 RPM, 7K TQ 200K PUW, 135K SOW, 140K RTW 23:30 - 00:00 0.50 CLEAN P DECOMP RU TO PERFORM LOT 9/23/2010 00:00 - 00:30 0.50 CLEAN P DECOMP 8.4 PPG MW IN AND OUT. PERFORM LOT TO 3754 PSI AT 8897' ND. 16.5 PPG EMW 00:30 - 01:00 0.50 CLEAN P DECOMP RD AND BLOW DOWN LINES. 01:00 - 02:00 1.00 CLEAN P DECOMP CIRCULATE AT 11877' MD AT 500 GPM AND 2650 PSI. CONSULT WITH TOWN ON LOT RESULTS 02:00 - 05:00 3.00 CLEAN P DECOMP DRILL CEMENT FROM 11920' MD TO 11960' MD. PUMP SWEEPS AS NEEDED 535 GPM, 2908 PSI 50 RPM, 8.8 TQ 05:00 - 06:00 1.00 CLEAN P DECOMP WASH/REAM DOWN FROM 11970' TO 12005' MD 06:00 - 08:00 2.00 CLEAN P DECOMP CONTINUE DRILLING CEMENT FROM 12005' MD TO 12021' MD. 540 GPM, 2780 PSI 200K PUW, 115K SOW, 125K RTW 50 RPM, 9K TQ ON, 8K TQ OFF 08:00 - 09:30 1.50 CLEAN P DECOMP CIRCULATE TO CLEAN HOLE AT 450 GPM, 1980 PSI Printed 12/9/2010 2:04:20PM 0- ©rih America A 14:4 A S PA 4,140 1 fa e is ,� -fi s s- P " `,, ` z A v e r t - =ter �. ,:f2. > `, O pera t ion ummary Repo Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:30 - 11:00 1.50 CLEAN P DECOMP POOH FROM 12021' TO 10372' MD 210K PUW, 115K SOW 11:00 - 13:00 2.00 CLEAN P DECOMP DISPLACE WELL WITH CLEAN WATER AND NXS LUBE. RECIPRICATE FROM 10372' TO 10279' MD 387 GPM, 1640 PSI 70 RPM, 5K TQ 167K PUW, 135K SOW, 145K RTW 13:00 - 13:30 0.50 CLEAN P DECOMP ,MONITOR WELL, 8.4 PPG MW IN AND OUT. RIH FROM 10372' TO 12021' MD 13:30 - 17:30 4.00 CLEAN P DECOMP CIRCULATE AND RECIPRICATE FROM 12020' MD TO 11971' MD 182 GPM, 515 PSI 30 RPM, 5K TQ 185K PUW, 145K SOW, 162K RTW 17:30 - 21:00 3.50 CLEAN P DECOMP PJSM, PUMP 100 BBLS AT 140 DEG FRESH WATER. LITTLE RED PUMP 50 BBLS OF DIESEL WITH BARA- SCRUB, FOLLOWED BY ANOTHER 5 BBLS OF DIESEL. RIG FOLLOW WITH ANOTHER 40 BBLS OF 140 DEG FRESH WATER. LET SOAK FOR 5 MIN. PUMP 100 BBLS OF FREAH WATER. CLOSE BOTTOM RAMS AND OPEN TO TIGER TANK. RIH DISPLACE WITH 250 BBLS FRESH WATER. 21:00 - 00:00 3.00 CLEAN P DECOMP - POOH FROM 12021' MD TO 2847' MD 9/24/2010 00:00 - 02:00 2.00 CLEAN P DECOMP POOH FROM 2847' MD TO SURFACE. LD CLEAN OUT BHA. CLEAN AND CLEAR RIH FLOOR. 02:00 - 03:00 1.00 EVAL P DECOMP RU SLB E -LINE, RU SHEEVES IN DERRICK. 03:00 - 03:30 0.50 EVAL P DECOMP RIH WITH USIT ON E -LINE TO 200' 03:30 - 05:30 2.00 EVAL N DFAL DECOMP ERROR WITH TELEMETRY SYSTEM WHILE ESTABLISHING FLUID PARAMETERS. POOH AND LD USIT. INSTALL NEW TELEMETRY TOOL AND RIH 05:30 - 12:30 7.00 EVAL P DECOMP RIH TO 12000' MD AND BEGIN LOGGING 7" CASING WITH USIT TO SURFACE 12:30 - 13:00 0.50 EVAL P DECOMP RD SLB E -LINE 13:00 - 18:00 5.00 STWHIP P WEXIT PU 7" WHIPSTOCK BHA WITH STARTER MILL AND 3 WATERMELON MILLS AND IMPULSE MWD TO 1054' MD 18:00 - 19:00 1.00 STWHIP P WEXIT ATTEMPT TO SHALLOW HOLE TEST MWD AT 1054' MD AT 180 GPM AND 294 PSI, POOR SIGNAL. RIH WITH WHIPSTOCK TO 4" DP FROM 1054' TO 1789' MD. SHALLOW HOLE TEST MWD WITH 275 GPM AND 973 PSI. GOOD TEST. 19:00 - 00:00 5.00 STWHIP P WEXIT RIH FROM 1807' TO 10272' 165K PUW, 130K SOW 9/25/2010 00:00 - 02:30 2.50 STWHIP P WEXIT RIH WITH WHIPSTOCK ASSEMBLY FROM 10272' TO 11936' MD. 190K PUW, 145K SOW TAKE 20K WEIGHT AT 11939' MD AND ATTEMPT TO WORK THROUGH ROTATING 1/2 TURN AT A TIME. ATTEMPT TO WASH THROUGH AT 165 GPM, AND 605 PSI WITHOUT SUCCESS. 02:30 - 04:00 1.50 STWHIP N DPRB 11,939.00 WEXIT SPOT LUBE AT BIT AT 165 GPM AND 605 PSI AND ATTEMPT TO WORK THROUGH TIGHT SPOT WITHOUT SUCCESS Printed 12/9/2010 2:04:20PM t',tian .& e+L �, { 'xe� - F' 4 .$ � P � .`Yr '10-. �? : � s` �` '}�'# a`L� 7 V i��f�"i t a fi �`. S g. ICS t S Y > � �" L era #ion Summary ' Re n 4 Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 10:30 6.50 STWHIP N DPRB 11,939.00 WEXIT MONITOR WELL, STATIC. PUMP DJ. POOH WITH WHIPSTOCK ASSEMBLY FROM 11936' TO 846' MD 10:30 - 12:30 2.00 STWHIP N DPRB 11,939.00 WEXIT LD WHIPSTOCK BHA, RD HWDP AND DRILL COLLERS. LD WHIPSTOCK MILLS AND SLIDE 12:30 - 14:30 2.00 CLEAN N DPRB 11,939.00 WEXIT PU CLEANOUT BHA. FULL GAUGE JUNK MILL, 2 STRING MILLS AND JARS TO 769' MD 55K PUW, 55K SOW 14:30 - 19:30 5.00 CLEAN N DPRB 11,939.00 WEXIT RIH WITH CLEAN OUT BHA FROM 769' TO 11774' MD. - 187K PUW 150K SOW 19:30 - 22:00 2.50 CLEAN N DPRB 11,939.00 WEXIT WASH DOWN FROM 11774' MD TO 11880' MD AT 167 GPM AND 500 PSI. SLIDE JUNK MILL THROUGH WINDOW TO 11909' MD. TAKE 5K WEIGHT AT 11910' MD. MILL WITH 1K WOB AND 60 RPM FROM 11910' TO 11913' MD. ATTEMPT TO SLIDE THROUGH AND TAKE 30K WEIGHT. WORK MILL WITH 10K DOWN WEIGHT AND ABLE TO SLIDE THROUGH OBSTRUCTION. RIH FROM 11913' MD TO 11967' MD. REAM FROM 11967' MD TO 12015' MD. RIH AND TAG EZSV AT 12020' MD. 22:00 - 00:00 2.00 CLEAN N DPRB 11,939.00 WEXIT DISPLACE WELL TO 8.4 PPG QUIKDRIL N MILLING FLUID. WORK MILLS ACROSS WINDOW AND TIGHT SPOT FROM 11980' MD TO 11950' MD BIT DEPTH. - 275 GPM, 1380 PSI - 100 RPM, 5K TQ - 187K PUW, 145K SOW, 155 RTW WORK MILLS ACROSS WINDOW WITHOUT CIRCULATION, NO DRAG. RUN MILL THROUGH WINDOW AND TIGHT SPOT WITHOUT PUMPS OR ROTATING, NO DRAG. TAG EZSV AT 12020' MD 9/26/2010 00:00 - 01:00 1.00 CLEAN N DPRB 11,939.00 WEXIT CONTINUE TO WORK MILLS THROUGH WINDOW AND TIGHT SPOT WITHOUT ROTATION OR PUMPS, NO DRAG. RUN ALL MILLS THROUGH WINDOW AND TAG EZSV AT 12020' MD. POOH TO 11868' MD WITH NO DRAG. 190K PUW, 145K SOW 01:00 - 04:30 3.50 CLEAN N DPRB 11,939.00 WEXIT MONITOR WELL, STATIC. PUMP DRY JOB. POOH FROM 11868' MD TO 769' MD 04:30 - 06:30 2.00 CLEAN N DPRB 11,939.00 WEXIT PJSM, RACK BACK 5 STDS HWDP, 2 STDS DRILL COLLARS, LD CLEANOUT BHA 06:30 - 08:30 2.00 STWHIP N DPRB 11,939.00 WEXIT PJSM, PU WHIPSTOCK AND MILLING BHA TO 865' MD. 08:30 - 12:00 3.50 STWHIP N DPRB 11,939.00 WEXIT RIH FROM 865' MD TO 1995' MD. SHALLOW HOLE TEST MWD AT 250 GPM AND 825 PSI. CONTINUE RUNNING IN HOLE FILLING EVERY 30 STANDS TO 6603' MD. 125K PUW, 100K SOW 12:00 - 16:00 4.00 STWHIP N DPRB 11,939.00 WEXIT RIH FROM 6603' MD TO 11964' MD. 195K PUW, 145K SOW SLOW PUMP RATES TAKEN Printed 12/9/2010 2:04:20PM � P age orttt Amerrca ALASKA �P Qpera#�on ummar r Repor A, Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:00 - 17:00 1.00 STWHIP P WEXIT ORIENTWHIPSTOCK 65 RIGHT OF HIGH SIDE. SET ANCHOR AT 12020' MD WITH 20K DOWN TO SHEAR ANCHOR. PU 10K OVER TO CONFIRM SET. SET DOWN 45K AND SHEAR OFF WHIPSTOCK. 171 GPM, 1002 PSI 60 RPM, 6K TQ 195K PUW, 145K SOW, 160K RTW 17:00 - 00:00 7.00 STWHIP P WEXIT MILL WINDOW FROM 12003' TO 12010' MD 200 GPM, 1492 PSI 100 RPM 10K TQ 195K PUW, 145K SOW, 160 RTW 9/27/2010 00:00 - 15:00 15.00 STWHIP P WEXIT MILL WINDOW FROM 12010' TO 12017' MD AND 20' OF NEW HOLE TO 12032' MD. 200 GPM, 1655 PSI - 80 RPM, 6 -7K TQ 15- 25.WOB 190K PUW, 145K SOW, 150K RTW TOW = 12003' MD/12012' ELM BOW = 12017' MD/12026' ELM 15:00 - 16:00 1.00 STWHIP P WEXIT CIRCULATE HI-VIS SWEEP, WORK MILLS ACROSS WINDOW WITH CIRCULATION AND ROTATION AND W/O CIRCULATION AND ROTATION. NO DRAG UP OR DOWN THROUGH WINDOW 16:00 - 16:30 0.50 STWHIP P WEXIT MONITOR WELL, STATIC 8.6 MW IN AND OUT. POOH FROM 12037' TO 11850' MD. 16:30 - 17:30 1.00 STWHIP P WEXIT PERFORM FIT TO 728 PSI, 8.6 PPG MW AT 12003' MD/8932' TVD. 10.1 PPG EMW 17:30 - 18:30 1.00 STWHIP P WEXIT CUT AND SLIP DRILLING LINE. ADJUST BRAKES 18:30 - 19:00 0.50 STWHIP P WEXIT SERVICE TOP DRIVE AND CROWN 19:00 - 19:30 0.50 STWHIP P WEXIT SLOW PUMP RATES TAKEN MONITOR WELL, STATIC. PUMP DRY JOB 19:30 - 00:00 4.50 STWHIP P WEXIT POOH FROM 11850' TO 2071' MD 9/28/2010 00:00 - 00:30 0.50 STWHIP P WEXIT POOH FROM 2071' MD 847' MD. 00:30 - 02:00 1.50 STWHIP P WEXIT LD 5 STANDS OF HWDP, 3 STANDS OF DRILL COLLARS AND MILLS. BOTH UPPER MILLS IN GAUGE. CLEAN AND CLEAR RIG FLOOR. 02:00 - 03:30 1.50 STWHIP P WEXIT PULL WEAR RING. DRAIN STACK AND FUNCTION RAMS. RU AND JET STACK, KILL AND CHOKE LINES. RD AND BLOW DOWN LINES. INSTALL WEAR RING. 03:30 - 05:00 1.50 STWHIP P WEXIT PJSM, MU BHA #15: 6" MX -18HDX HUGHES, SHORT PAK PDM 2.0 DEG MOTOR, IMPULSE MWD AND PBL CIRC SUB. TORQUE BIT TO 9K FT -LBS. 05:00 - 06:00 1.00 STWHIP P WEXIT PJSM, PU DRP FROM 197' TO 1139' MD. ATTEMPT TO SHALLOW HOLE TEST MWD. PIPE PRESSURED UP, UNABLE TO CIRCULATE. ATTEMPT TO PUMP AGAIN, STILL PRESSURING UP. 06:00 - 07:00 1.00 STWHIP N DFAL 1,139.00 WEXIT POOH FROM 1139' TO 197' MD 07:00 - 08:30 1.50 STWHIP N DFAL 1,139.00 WEXIT LD BHA #15, UNABLE TO TURN BIT BOX ON MOTOR 08:30 - 09:30 1.00 STWHIP N DFAL 1,193.00 WEXIT CHANGE OUT IBOP AND SAVER SUB 09:30 - 11:30 2.00 STWHIP N DFAL 1,139.00 WEXIT PJSM, PU BHA #16 TO 196' MD Printed 12/9/2010 2:04:20PM ca RLAS r" Pa 2 '0t: ' Op � r a tior $ urpmary Report l Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:30 - 12:00 0.50 STWHIP N DFAL 1,139.00 WEXIT RIH FROM 196' TO 1137' MD, SHALLOW HOLE TEST MWD AT 250 GPM AND 1040 PSI 12:00 - 14:30 2.50 STWHIP P WEXIT RIH ON 4" DRILL PIPE SINGLES FROM 1137' TO 3582' MD. 14:30 - 18:30 4.00 STWHIP P WEXIT RIH FORM 3582' TO 11859' MD - 185K PUW, 140K SOW FILL PIPE EVERY 30 STDS 18:30 - 20:00 1.50 STWHIP P WEXIT SERVICE TOP DRIVE TIW /SAVER SUB AND ACTUATED IBOP. PRESSURE TEST TO 250 PSV5MIN, 4000 PSV5 MIN EACH 20:00 - 21:00 1.00 STWHIP P WEXIT RIH FROM 11859' TO 11953' MD, ORIENT 65 DEG RHS, SLIDE THROUGH WINDOW WITHOUT DRAG. WASH DOWN FROM 12030' TO 12037' MD SLOW PUMP RATES TAKEN 21:00 - 00:00 3.00 DRILL P PROD1 SLIDE DRILL AHEAD! FROM 12037' TO 12079' MD. BUILD AND TURN s - 228 GPM, 1880 PSI ON, 1722 PSI OFF - 10 -20K WOB 180K PUW 135K SOW 9/29/2010 00:00 - 05:30 5.50 DRILL P PROM DIRECTIONAL DRILL AHEAD IN 6" PRODUCTION HOLE FROM 12079' MD TO 12202' MD. BUILD AND TURN FROM 65 DEG 1NC TO 84 DEG INC AND 61 TO 90 DEG AZM. - 252 GPM, 1980 PSI ON, 1890 PSI OFF - 15 -20K WOB - 183K PUW, 137K SOW 05:30 - 07:00 1.50 DRILL P PROD1 CIRCUALTE 40 BBLS HI-VIS SWEEP AROUND AT 250 GPM AND 1920 PSI SLOW PUMP RATES TAKEN 07:00 - 07:30 0.50 DRILL P PROD1 MONITOR WELL, STATIC. PUMP OUT OF HOLE FROM 12215' TO 11948' MD AT 250 GPM, 1800 PSI 07:30 - 12:30 5.00 DRILL P PROD1 MONITOR WELL FOR 10 MIN, STATIC. PUMP DRY JOB. POOH FROM 11948' TO 196' MD 12:30 - 14:00 1.50 DRILL P PROD1 MONITOR WELL. 8.6 MW IN AND OUT. LD BHA #16. STAND BACK FLEX COLLARS. MX -18HDX BIT GRADED: 1- 1WT- A- E -I -NO -BHA 14:00 - 17:00 3.00 DRILL P PROD1 PU BHA #17: 6" MRS513D -A1 B BIT, AIM MOTOR 1.5 DEG, IMPULSE MWD, ADN4 AND PBL SUB TO 214' MD. 17:00 - 22:00 5.00 DRILL P PROD1 RIH FROM 214' TO 1155' MD. SHALLOW HOLE TEST MWD. CONTINUE TO RIH FROM 1155' TO 11877' MD. 205K PUW, 125K SOW 22:00 - 22:30 0.50 DRILL P PROD1 SLIP AND CUT 70' OF DRILLING LINE 22:30 - 23:30 1.00 DRILL P PROD1 RIH FROM 11877' TO 12003' MD. ORIENT 65 DEG RHS. SLOW PUMP RATES TAKEN 23:30 - 00:00 0.50 DRILL P PROD1 RIH FROM 12003' TO 12160' MD. 10K DRAG FROM 12038' TO 12040' MD. 9/30/2010 00:00 - 01:30 1.50 DRILL P PROD1 ATTEMPT WORK PIPE DOWN PAST 12160' MD WITH AND WITHOUT PUMPS. TAKING 10 -20K WEIGHT. WORK DOWN TO 12170' MD, TAKE 30K WEIGHT. HOLE PACKING OFF. 25 -45K OVER PULL. 01:30 - 02:30 1.00 DRILL P PROD1 WORK PIPE BACK TO 12083' MD. PUMP OUT OF HOLE TO 12025' WITHOUT PROBLEMS. CBU 1X AT 250 GPM AND 1930 PSI. Printed 12/9/2010 2:04:20PM �Q KA P� P e 22 of 28 Operation Su nmalry Report Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 03:30 1.00 DRILL P PROD1 RIH TO 12060' MD AND START TAKING WEIGHT. WORK PIPE DOWN TO 12198' MD, TAKING 10 -20K WEIGHT. UNABLE TO WORK PAST 12198' MD. PULL BACK TO 12059' TAKING 10 -20K OVER PULLS. RIH TO 12170' AND TAKE WEIGHT. ATTEMPT TO WORK THROUGH. HOLE PACKING OFF AND TAKING 25K OVERPULL 03:30 - 04:30 1.00 DRILL P PROD1 WORK PIPE BACK TO 12060' MD. PUMP OUT OF HOLE TO 12024' MD. RECIPRICATE PIPE FROM 12024' TO 12056' WHILE CIRCULATING HOLE CLEAN AT 255 GPM AND 2017 PSI. 04:30 - 05:30 1.00 DRILL P PROD1 WASH DOWN FROM 12024' MD TO 12080' AND TAKE WEIGHT. WORK DOWN TO 12215' WITH PUMPS. - 250 GPM, 1980 PSI 05:30 - 12:00 6.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12215' TO 12304' MD WITH 6" PRODUCTION BHA. BUILD FROM 88 DEG TO 97 DEG INC AND TURN FROM 91 DEG TO 96 DEG AZM. - 250 GPM, 2140 PSI ON, 2020 PSI OFF 20K WOB -21 OK PUW, 117K SOW 12:00 - 00:00 12.00. DRILL P PROD1 . DIRECTIONAL DRILL AHEAD FROM 12304' TO 12535' MD WITH 6" PRODUCTION BHA. HOLD AT 96 DEG INC AND TURN FROM 96 DEG TO 108 DEG AZM. - 250 GPM, 2310 PSI ON, 2052 PSI OFF - 10 -20K WOB - 40 RPM, 9K TQ ON, 7K TQ OFF - 185K PUW, 120K SOW, 145K RTW CALC ECD =10.0 PPG, ACTUAL ECD = 10.09 PPG SLOW PUMP RATES TAKEN KICK WHILE TRIPPING DRILL (D -1) 10/1/2010 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12535' TO 12911' MD WITH 6" PRODUCTION BHA. DROP FROM 94 DEG TO 90 DEG INC AND TURN FROM 110 DEG TO 128 DEG AZM. - 250 GPM, 2345 PSI ON, 2130 PSI OFF - 10 -20K WOB - 60 RPM, 8.5K TQ ON, 6.5K TQ OFF - 192K PUW, 130K SOW, 147K RTW CALC ECD =9.92 PPG, ACTUAL ECD = 10.26 PPG SLOW PUMP RATES TAKEN 12:00 - 00:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 12911' TO 13757' MD WITH 6" PRODUCTION BHA. HOLD AT 90 AND TURN FROM 128 DEG TO 118 DEG AZM. - 250 GPM, 2345 PSI ON, 2290 PSI OFF - 10 -20K WOB - 80 RPM, 8.5K TQ ON, 6.5K TQ OFF - 190K PUW, 135K SOW, 147K RTW CALC ECD =10.0 PPG, ACTUAL ECD = 10.48 PPG SLOW PUMP RATES TAKEN Printed 12/9/2010 2:04:20PM America ALASKA BP ' Page 23 n 8 Q era iion`_ ummary o � ' P A �� � .:.:_ '3 T Y Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/2/2010 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 13757' TO 14291' MD WITH 6" PRODUCTION BHA. BUILD FROM 90 DEG TO 92 DEG INC, THEN DROP FROM 92 DEG TO 87 DEG INC. TURN FROM 118 DEG AZM TO 135 DEG AZM. - 250 GPM, 2705 PSI ON, 2415 PSI OFF 10 -20K WOB - 60 RPM, 9.5K TQ ON, 6.5K TQ OFF - 195K PUW, 133K SOW, 145K RTW CALC ECD= 10.21 PPG, ACTUAL ECD = 10.53 PPG SLOW PUMP RATES TAKEN KICK WHILE DRILLING DRILL (D2) 12:00 - 16:30 4.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14291' TO 14467' MD WITH 6" PRODUCTION BHA. HOLD AT 88 DEG INC. TURN FROM 135 DEG AZM TO 144 DEG AZM. - 250 GPM, 2690 PSI ON, 2370 PSI OFF 10 -20K WOB - 60 RPM 10K TQ ON, 6.5K TQ OFF 195K PUW, 133K SOW, 145K RTW CALC ECD =10.21 PPG, ACTUAL ECD = 10.53 PPG KICK WHILE DRILLING DRILL (D2) BEGIN TAKING 152 BPH DYNAMIC LOSSES AT 14467' MD, NO STATIC LOSSES 16:30 - 20:00 3.50 DRILL P PROD1 SLOW PUMPS TO 2 BPM AND 835 PSI. PULL UP OFF BOTTOM TO 14445' MD. LOSSES SLOWED TO 100 BPH. DROP BALL 1.5" AND PUMP DOWN WHILE RECIPRICATING PIPE AND ROTATING PIPE AT 30 RPM, 7K TQ. OPEN UP PBL SUB, 25 PSI PRESSURE DROP. BRING RATE UP TO 250 GPM AND 1330 PSI. PUMP 40 BBL LCM PILL WITH 40 PPB CALCIUM CARBONATE. SPOT ON BOTTOM AND LET SIT FOR 15 MIN. MONITOR WELL, BREATHING, CONFIRM RETURNS STOPPED. LOSSES SLOWED TO 40 BPH. DROP STEEL BALLS AND PUMP DOWN AT 4 BPM AND 1060 PSI. SHIFT CLOSE PBL SUB WITH 3000 PSI. CONFIRM BHA OPEN. SLOW PUMP RATES TAKEN 20:00 - 00:00 4.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14467' TO 14603' MD WITH 6" PRODUCTION BHA. HOLD AT 88 DEG INC. TURN FROM 144 DEG AZM TO 151 DEG AZM. MONITOR WELL ON CONNECTIONS FOR DECREASING FLOW. - 250 GPM, 2620 PSI ON, 2257 PSI OFF - 10 -20K WOB - 60 RPM, 10K TQ ON, 6.5K TQ OFF - 190K PUW, 125K SOW, 147K RTW CALC ECD =10.04 PPG, ACTUAL ECD = 10.53 PPG SLOW PUMP RATES TAKEN Printed 12/9/2010 2:04:20PM lip America ALASK ABP Page 24 of 2: I , ' 'RtOtil'-ttft!ttr''ti Summary Repbitti- , Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10/3/2010 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14603' TO 14900' MD WITH 6" PRODUCTION BHA. BUILD FROM 90 DEG TO 98 DEG INC. TURN FROM 154 DEG AZM TO 166 DEG AZM. MONITOR WELL ON CONNECTIONS FOR DECREASING FLOW. - 250 GPM, 2660 PSI ON, 2380 PSI OFF 10 -20K WOB 60 RPM, 10K TQ ON, 7K TQ OFF - 190K PUW 125K SOW, 147K RTW CALC ECD =10.04 PPG, ACTUAL ECD = 10.64 PPG KICK WHILE DRILLING DRILL LOSING 10 -15 BPH OF 8.6 PPG QUIKDRIL N WHILE CIRCULATING SLOW PUMP RATES TAKEN 12:00 - 21:30 9.50 DRILL P PROD1 DIRECTIONAL DRILL AHEAD FROM 14900' TO TD AT 15420' MD. WITH 6" PRODUCTION BHA. DROP FROM,98 DEG TO 89 DEG INC AND HOLD TO TD. TURN FROM 166 DEG AZM TO 170 DEG AZM AND HOLD TO TD. MONITOR WELL ON CONNECTIONS FOR DECREASING FLOW. -250 GPM, 2815 PSI ON, 2430 PSI OFF 10 -20K WOB - 60 -80 RPM, 9.5K TQ ON, 7K TO OFF - 195K PUW, 125K SOW, 145K RTW CALC ECD =10.35 PPG, ACTUAL ECD = 11.07 PPG KICK WHILE DRILLING DRILL LOSING 10 -15 BPH OF 8.6 PPG QUIKDRIL N WHILE CIRCULATING SLOW PUMP RATES TAKEN 21:30 - 23:00 1.50 DRILL P PROD1 CIRCULATE 410 BBLS OF 8.6 PPG MUD AT 250 GPM AND 2540 PSI - 80 RPM, 7K TQ MONITOR WELL, BREATHING, CONFIRM FLOW STOPPED. OFF LOAD DILUTION FLUID TO PITS. 23:00 - 00 :00 1.00 DRILL P PROD1 PUMP 160 BBLS OF NEW 8.5 PPG QUIKDRIL N MUD. BACK REAM FROM 15356' TO 15262' MD. - 250 GPM, 2450 PSI - 80 RPM, 7K TQ MONITOR WELL ON CONNECTIONS 10/4/2010 00:00 - 01:00 1.00 DRILL P PROD1 BACKREAM OUT OF HOLE FROM 15262' TO 15074' MD. WORK TIGHT HOLE FROM 15126' TO 15072' MD. - 250 GPM, 2310 PSI - 40 RPM, 5 -10K TQ - 145K RTW SHUT DOWN AND MONITOR WELL FOR FLOW, CONFIRM BREATHING. TURN PUMP BACK ON AND PRESSURE DROPPED TO 1330 PSI AT 250 GPM 01:00 - 02:30 1.50 DRILL N DFAL 15,072.00 PROD1 TROUBLE SHOOT DROP IN PUMP PRESSURE. CHECK SURFACE EQUIPMENT, CLEAN PUMP SCREENS, PRESSURE TEST SURFACE EQUIPMENT, ALL GOOD. RE -CHECK PUMP PRESSURE, 250 GPM AND 1330 PSI. SUSPECT PBL SUB OPEN Printed 12/9/2010 2:04:20PM : Paget - f 5. ALASKA t Operation Summary Rspc*rt v ' "` e. ; 4 Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual ©64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 04:00 1.50 DRILL N DFAL 15,072.00 PROD1 DROP 1.5" VINYL BALL TO FUNCTION PBL SUB. PUMP DOWN AT 170 GPM AND 1070 PSI. 25 PSI INCREASE THEN DROP OFF. CHECK PUMP PRESSURES, 250 GPM AND 1330 PSI. DROP BALL TO DIVERT FLOW THROUGH BHA. PUMP DOWN AT 170 GPM AND 1164 PSI. PUMP PRESSURE INCREASED FROM 1164 PSI TO 1936 PSI. INCREASE PUMP TO 250 GPM AND 2370 PSI. 04:00 - 12:00 8.00 DRILL P PROD1 BACKREAM OUT OF HOLE FROM 15072' TO 13757' MD. WORKING PIPE THROUGH TIGHT HOLE. MONITOR WELL ON CONNTECTIONS - 250 GPM, 2250 PSI - 40 RPM, 5-10K TQ -145K RTW 90 BBLS MUD LOST TO WELL IN PAST 12 HRS 12:00 - 17:00 5.00 DRILL P PROD1 CONTINUE BACKREAMING OUT OF HOLE FROM 13757' TO 12868' MD. - 250 GPM, 2250 PSI - 40 RPM, 5-10K 185K PUW, 120K SOW, 145K RTW 17:00 - 18:30 1.50 DRILL P PROD1 . PIPE TORQUED UP AND TOOK 20K OVERPULL AT 12868' MD. UNABLE TO MOVE PIPE. WORK PIPE AND JAR DOWN TO FREE PIPE. 18:30 - 22:00 3.50 DRILL P PROD1 CONTINUE TO BACKREAM OUT OF THE HOLE FROM 12868' TO 12450' MD. PUMP OUT OF HOLE FROM 12450' TO 12235' MD. 10K OVERPULL AT 12235' MD 22:00 - 00:00 2.00 REMCMT P PROD1 UNABLE TO MOVE PIPE AT 12235' MD. WORK AND JAR PIPE DOWN ON PIPE PBL INADVERTENTLY OPENED. DROP BALLS TO FUNCTION PBL 10/5/2010 00:00 - 01:00 1.00 DRILL P PROD1 CONTINUE TO WORK PIPE AND PUMP DOWN PBL BALLS AT 170 GPM AND 110 PSI. PRESSURE UP TO 2400 PSI TO SHIFT PBL SUB. CONFIRM THAT PBL SHIFTED, 250 GPM AND 2200 PSI. CONTINUE TO WORK PIPE DOWN TO FREE. PIPE FREE DOWN 01:00 - 01:30 0.50 DRILL P PROD1 WORK PIPE AND CIRCULATE TO CLEAR BHA. PBL SHIFTED OPEN 01:30 - 02:30 1.00 DRILL P PROD1 RIH FROM 12290' TO 12848' MD - 195K PUW, 125K SOW 02:30 - 04:00 1.50 DRILL P PROD1 TURN ON PUMPS AND PBL SUB CLOSED INADVERTENTLY, REGAIN CIRCULATION PRESSURE CIRCULATE 50 BBLS HIGH VIS SWEEP SURFACE TO SURFACE AT 250 GPM AND 2100 PSI. - 60 RPM, 6K TQ - 145K RTW Printed 12/9/2010 2:04:20PM 6iih ,Ampnca ALASK 8R . I' 1 P W 2 Ps ilip c 3 ' ? - 3 i , x __21-'40:7.7.'";,-'1'', . Y, y " ' � ,, ,s y ' : , E ©per ltion Su R epo rt � 4 Common Well Name: S-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 07:00 3.00 DRILL P PROD1 BACKREAM FROM 12,848' TO 12,440' MD. - 250 GPM, 1,975 PSI. - 60 RPM, 5 -6K TQ - 145K ROT WT. PUMP OUT OF HOLE FROM 12,440' TO 12,243' MD. TAKE WEIGHT, HANG UP, AND WORK PIPE FREE - PUMP OUT AT 250 GPM, 1,140 PSI; PBL SUB OPENED. UP AGAIN. BACKREAM FROM 12,243' TO 12,159' MD WITH SAME PARAMETERS AS ABOVE. POH ON ELEVATORS FROM 12,159' TO 12,003`. - PU WT 190K, SO WT 125K. 07:00 - 08:00 1.00 DRILL P PROD1 CBU X 2 AT 7" WINDOW. - 400 GPM, 1,775 PSI. - 60 RPM. TQ 4.5K. - ROT WT 145K. 08:00 - 09:30 1.50 DRILL P PROD1 MONITOR WELL UNTIL STATIC. - PERFORM POST - JARRING DERRICK AND TD INSPECTION. - PUMP DRY JOB AND MONITOR WELL UNTIL STATIC. MW 8.6 PPG IN AND OUT. 09:30 - 12:00 2.50 DRILL P PROD1 POH FROM 12,003' TO 4,917'. - PU WT 105K, SO WT 90K. - PBL SUB CLOSED. 12:00 - 14:30 2.50 DRILL P PROD1 POH 4,917' TO 215'. - MONITOR WELL; SLIGHT LOSS. - MW 8.6 PPG IN AND OUT. 14:30 - 16:30 2.00 DRILL P PROD1 PJSM FOR HANDLING RA SOURCES AND LD BHA. - HANDLE RA SOURCES. - CLEAN AND CLEAR RIG FLOOR. - BIT GRADE — 0- 1- WT- G- I- X- NO -TD. 16:30 - 17:00 0.50 DRILL P PROD1 TEST BOPE. - PULL WR. - SET TEST PLUG. - RU TEST EQUIPMENT. 17:00 - 22:00 5.00 DRILL P PROD1 TEST BOPE. - TEST BOPE AND CHOKE MANIFOLD TO 250 PSI LOW AND 4,000 PSI HIGH WITH 4" AND 4 -1/2" TEST JOINTS. TEST ANNULAR PREVENTER TO 250 PSI LOW AND 2,500 PSI HIGH WITH 4" TEST JOINT. - ALL TESTS GOOD. AOGCC REP CHUCK SCHEVE WITNESSED THE TEST. TEST WITNESSED BY BP WSLS DAVE NEWLON, JEFF LOFTIS, AND RAYMOND PLATT AND NAD PUSHERS LARRY WURDEMAN AND LENWARD TOUSSANT. 22:00 - 22:30 0.50 DRILL P PROD1 REMOVE TEST PLUG, INSTALL WEAR RING, AND RD /BD TEST EQUIPMENT /LINES. 22:30 - 23:00 0.50 DRILL P PROD1 LOAD PIPESHED WITH MWD TOOLS AND 4" HWDP. - ASSEMBLE SLIM PULSE MWD. Printed 12/9/2010 2:04:20PM grthAtnlerlcB -ALASKAN 8P 4 5 Pa ti _� Opera ion Sum aa ry Repo Common Well Name: S -41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- 00W9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S -41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 23:00 - 00:00 1.00 DRILL P PROD1 PU BHA # 18 FOR CLEAN- OUT/WIPER RUN. - MU 10' FLEX DRILL COLLAR, NB STAB, AND BIT TO 18'. - CONTINUE ASSEMBLING SLIM PULSE MWD. 10/6/2010 00:00 - 01:30 1.50 DRILL P PROD1 CONTINUE PU BHA # 18 TO 177'. 01:30 - 06:30 5.00 DRILL P PROD1 RIH WITH BHA # 18 TO 7" WINDOW AT 11,934'. SHALLOW -HOLE TEST MWD AT 1,119'; 150 GPM, 380 PSI. - PU WT 177K, SO WT 140K. 06:30 - 07:00 0.50 DRILL P PROD1 SLIP AND CUT 87' OF DRILLING LINE. 07:00 - 07:30 0.50 DRILL P PROD1 SERVICE TOP DRIVE. - SERVICE TOP DRIVE, CROWN, BLOCKS, AND INSPECT BRAKES AND DRAWWORKS. 07:30 - 09:30 2.00 DRILL P PROD1 RIH FROM 11,934' TO 14,642'. - TAKE WEIGHT IN REGION OF FAULT AND RUBBLE ZONE. 09:30 - 10:30 1.00 DRILL P. PROD1 REAM DOWN FROM 14,642' TO 14,755'. - 150 GPM, 1,250 PSI. - 50 RPM. 6 -9K TQ. 150K ROT WT. - ATTEMPT TO BACK REAM SAME; PACK -OFF, TQ UP, AND STALL ROTARY. 10:30 - 11:30 1.00 DRILL P PROD1 RIH FROM 14,755' TO 15,319'. - WORK DOWN TO 15,416'. - 150 GPM, 1,350 PSI. 11:30 - 16:30 5.00 DRILL P PROD1 CBU X 4. - STAGE PUMPS - -150 GPM, 1,350 PSI; 180 GPM, 1,550 PSI; 215 GPM, 1,900 PSI; 225 GPM, 1,985 PSI; 250 GPM, 2,225 PSI. - PU WT 195K, SO WT 125K. - 80 RPM. 6.5K TQ. - SLIGHT PACK -OFF AND ROTARY STALL. - RECIPROCATE PIPE. - WASH TO BOTTOM. - PU WT 195K, SO WT 125K, ROT WT 145K. - MW 8.6+ PPG IN AND OUT. 16:30 - 21:00 4.50 DRILL P PROD1 BACKREAM FROM 15,420' TO 14,702'. - PUMP 40 BBL LUBE PILL AND CLEAR BHA. - ROTARY STALL AND PACKING OFF. - ESTABLISH CIRCULATION AND ROTATION AND CONTINUE BACKREAMING TO 14,285'. - MONITOR WELL; WELL BREATHING; CONFIRM FLOW SUBSIDES. 21:00 - 21:30 0.50 DRILL P PROD1 TRY TO POH ON ELEVATORS; SWABBING. 21:30 - 00:00 2.50 DRILL P PROD1 PUMP OUT OF HOLE FROM 14,285' TO 7" WINDOWAT 11,934'. - 5 BPM, 1,280 PSI. 10/7/2010 00:00 - 01:00 1.00 DRILL P PROD1 CBU AT 7" WINDOW. - 275 BBLS, 250 GPM, 1,585 PSI. - 80 RPM. -5KTQ. - 145K ROT WT. 01:00 - 02:30 1.50 DRILL P PROD1 MONITOR WELL. - MONITOR FOR 21 MINUTES UNTIL DEAD. - PUMP DRY JOB AND MONITOR FOR 17 MINUTES UNTIL DEAD. - DROP 2.25" RABBIT AT STD 125. Printed 12/9/2010 2:04:20PM 44 gi l a Pago4B42 Common Well Name: 5-41 AFE No Event Type: RE- ENTER- ONSHORE (RON) Start Date: 9/6/2010 End Date: 10/7/2010 X3- OOW9R -C (2,570,419.00 ) Project: Prudhoe Bay Site: PB S Pad Rig Name /No.: NABORS 7ES Spud Date/Time: Rig Release: 10/23/2010 Rig Contractor: NABORS ALASKA DRILLING INC. UWI: Active Datum: S-41A Actual @64.98ft (above Mean Sea Level) Date From - To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:30 - 06:30 4.00 DRILL P PROD1 POH FROM 11,934' TO 177'. 06:30 - 07:30 1.00 DRILL P PROD1 LAY DOWN BHA. CLEAN AND CLEAR RIG FLOOR. - BIT GRADE 1- 2- WT- A- E- I -ER -TD Printed 12/9/2010 2:04:20PM John Egbejimba Engineering Team Leader ;~`~~ ~~ ~ ~~~~ BP Exploration (Alaska), Inc. 6 P.O. Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU S-41L1 Sundry Number: 310-228 Dear Mr. Egbejimba: 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, ~ ,~ ~l Ct- , Cath~P. Foerster Commissioner DATED this ~~ay of August, 2010. Encl. (~ U STATE OF ALASKA ' 1 ALASKA OIL AND GAS CONSERVATION COMMISSI N s~ ~ APPLICATION FOR SUNDRY APPROVAL ~~,~ 20 AAC 25.280 ~` ~o~•JO 1. T,_yp/e of Request: 114-Abanddrt". Plug for Redrill"'~~~ ^ Perforate New Pool ^ Repair Well ^ Change Approved Program Suspend ^ Plug Perforations ^ Perforate ^ Pull Tubing ^ Time Extension ^ Operations Shutdown ^ Re-Enter Suspended Well ^ Stimulate ^ Alter Casing ^ Other 2. Operator Name: 4. Current Well Class: 5. Permit To Drill Number BP Exploration (Alaska) Inc. ,® Development ^ Exploratory 196-025 3. Address: ^ Service ^ Stratigraphic 6. API Number: P.O. Box 196612, Anchorage, Alaska 99519-6612 50-029-22645-60-00 ' t 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 S-41 L1 Spacing Exception Required? ^ Yes ®No 9. Property Designation: 10. Field /Pool(s): ADL 028257 - 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): 14085' - 8941' ~ 14085' 8941' None None Casin Len th Size MD TVD Burst Colla e Structural Conductor 0' 2 1 4 Surface 3298' -5/8" 332' 045' 575 3090 Intermediate 1237 ' 7" 11892' 88 7240 10 Production Liner 2114' 4-1 /2" 11921' - 14035' 901' - 8944' 843 7 0 Perforation Depth MD (ft): Perforation Depth TVD (ft): Tubing Size: Tubing Grade: Tubing MD (ft): Slotted: 11948' - 14005' 8911' - 8946' 4-1/2", 12.6# L-80 11367' Packers and SSSV Type: 7" x 4-1/2" Baker'S-3' packer Packers and SSSV 11311' / 8619' MD (ft) and TVD (ft): 12. Attachments: 13. Well Class after proposed work: ® Description Summary of Proposal ^ BOP Sketch ^ Exploratory ®Development ^ Service ^ Detailed Operations Program 14. Estimated Date for 15. Well Status after proposed work: Commencing Operations: July 30, 2010 ^ Oil ^ WINJ ^ WDSPL ^ Plugged 16. Verbal Approval: Date: ^ Gas ^ GINJ ^ GSTOR ^ Abandoned ^ WAG ^ SPLUG - ®Suspended Commission Representative: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Mel Rixse, 564-5620 Printed Name John E bejimba Title Engineering Team Leader Prepared By Name/Number: Signature ~ - Phone 564-5859 Date ~'7 f v Terrie Hubble, 564-4628 Commission Use Onl Conditions of approval: Notify Commission so that a representative may witness j 1`~ , Sundry Number: / v ^ Plug Integrity BOP Test ^ Mechanical Integrity Test ^ Location Clearance ~ 3sov psi ~3~P~-~~-~ r ) ~~i/~'V~® Oth ~ ~ ~`` er: ~ n n w~w / t.S ~ ZsoD s4 , r L /~/~s 4'cc~f~~~~ ZD ~GZS. Z85Ck;~ !?_ ~ ~ 2010 : ~ n -{~s~ e/a e T1Ni11SS1011 ~u C ~ ~ ' 0 a~e , X185#' (~ ! ~ 188 Subsequent Form Required: D_.., ~ si1C~{~i'3, ~, ~ Y ~ ~ ~ APPROVED BY ~ ~ ~ } -~. COMMISSIONER THE COMMISSION Date Approved By: ~ Form 10-403 Revised 01/201 AAA AUG 0 9 R ~ V ~ ~ ~ ~ ~ ~ $-/(~ Submit In Duplicate ~ b ~ p ~~~~ To: Tom Maunder Petroleum Engineer Alaska Oil & Gas Conservation Commission From: Mel Rixse Operations Drilling Engineer Date: 08 July 2010 Re: S-41 & S-41 L1 Abandonment and Sidetrack Sundry Approval Request Sundry approval is requested for S-41 & S-41 L1. Abandonment of the existing S-41 and S-41 L1 legs is proposed, followed by new drilling of dual lateral sidetracks to a new bottom hole locations. The isolation of the existing S-41 lateral will be accomplished with a permanent bridge plug with cement above. Abandonment of the S-41 L1 lateral will be accomplished with a cement squeeze through a drillable retainer. After abandonment of the existing laterals, two new laterals will be drilled to Sag River targets. The first lateral will be fully cemented and perforated. The second lateral will be a slotted liner dropped into open hole. WELL HISTORY/CURRENT STATUS: S-41 was drilled as a multi lateral completion in February, 1996. Both the Sag and Ivishak laterals have 4-1/2" slotted liner completions. The cement job on the pilot hole was pumped on 3/08/96. S-41 produced from 1996 though 2006 from the Sag and Ivishak. The rate dropped off quickly as the watercut rose. The water is predominantly from the Ivishak and the water mechanism in the Ivishak is the aquifer. A series of production profiles between 12/96 and 2/98 confirmed the Ivishak was high watercut (up to 97%). Several attempts to isolate the Ivishak lateral have not been successful. On 8/15/96 an attempt to obtain separate zone pressures was made by hanging a gauge from a plug below the Sag lateral and obtaining another Sag only SBHP above. The resulting pressures were very similar at 3193 psi Ivishak, 3171 psi Sag indicating that either the plug was not holding or another communication pathway exists. The last attempt with CT to isolate with a plug at 11923' MD was done on 4/5/98 and indications were that the plug had set, though subsequent production showed no change in total fluid or watercut. A video log run on 8/6/98 indicated extensive scaling (really bad from below GLM#1 @ 11233 MD to XN @ 13000' MD). The video log also noted that there was no production flowing by the plug at 11923' MD, again indicating that the plug was holding and another communication pathway likely exists between the Sag and Ivishak. A channel behind pipe is suspected, but has never been confirmed. REASON FOR SIDETRACK: The well was SI for TxIA communication in 2/06 and has remained SI since. A caliper run on 4/12/06 indicated 3 possible holes @ 1225', 2387' and 2777' MD and the tubing in poor condition for the upper 1/2 of the well. A WRP was set at 11162' (above a restriction at 11223' MD) on 11/5/06, but did not hold. The S-41A and S-41AL1 will be ho~tal producers that will target the Sager to the south of the parent wellbore. The two laterals are designed to determine remaining oil saturations in the R-20A injector dedicated Sag pattern. The two laterals have been placed on either side of the existing R-20A such that they may serve as producers if the two legs find good remaining oil saturations. If one or both of the S-41 A/S-41 AL1 laterals is water swept, the S-41 A/S-41 AL1 can be converted to an injector (perhaps after pre-production), which would reduce the pattern spacing to 1500-2400' and eliminate the need for an expensive rotary sidetrack of the R-20A. The S-41 A and S-41 AL1 will therefore provide critical information for the future economic redevelopment of the R-20A Sag pattern. ~~~ r~ ~~, ~ Z co~cv~. 0; l ~a~ ~f+s d~o~/P~ -'d l~ff r• ~ goo Pre-Ria Operations: a r,.,a~ercv~ Of p~S-t~~ /4-~t!"~Pn' ~ S~vt p~ ~~~f!"/~ ~t~~' P/'OdvG~'ion `Nivt /~~" U/-fGrusf+~/. ®~q~- d''a~ ~f /~r~C~i ~f t{Ar./ 1. F MIT-OA - 2000 psi .tC-~°"'~ rCCO~t~t i'n lxs PO~f'1r~ ~ T~{ ~~ 2. O AC-LDS tubing, AC-LDS IC. Repair and replace as required. G~~7' ~ 3. C Run video log to evaluate tubing and scale. 4. C Clean out existing scale from production tubing.(Assure clean tubing all the way to XXN plug at 11,923' MD) 5. S Drift tubing. 6. S Drift and caliper 7" to 11,909' MD. 7. S Set plug in X nipple at 11,334' MD. 8. F CMIT- T x IA 4000 psi. (Need to evaluate whether well can be turned into an injector later.) 9. E Drift for Jet cut. Jet cut tubing -11,309'MD (in pup joint above packer at 11,311'MD). 10. F Circulate well to 1% KCL and freeze protect. 11. V Set BPV 12. V PT tree (MV,SV,WV) 13. O Bleed gas lift and production flowlines down to zero and blind flange 14. O Remove S-Riser, Remove wellhouse, level pad -Complete Rig Operations: 1. MIRU rotary rig. 2. Pull BPV. Circulate out freeze protection with seawater and condition fluid as needed. Set a TWC and test from below to 1000 psi and above to 2000 psi. 3. Bleed tubing hanger void and IA to zero. 4. Nipple down tree and tubing head adapter. 5. Nipple up and test BOPE from above to 3500 psi high/250 psi low. Pull TWC. 6. RU and pull production tubing from the pre-rig jet cut. Test the lower set of pipe rams. Inspect all completion equipment for NORM. 7. Mill packer at 11,311'MD. 8. Fish tubing tail. 9. Mill packer at 11,909' MD. Push tubing tail to bottom (Top of fish -12,209' MD) 10. PU casing scraper w/string mills and make 7" casing scraper run to 12,209' MD. 11. RU Eline. Run USIT. Set bridge plug ~ 12,200' MD. Run CBL /Perforate (~10') ~~ 12,185' MD for cement squeeze path. 12. RIH with drillable Cement Retainer and set at -11,800'MD 13. Test for infectivity/squeeze cement. ~"~ .s~ z. t~ r~ S'Y~`2 ~~-. 14. Set RTTS. Test. 15. ND BOPE. 16. Change 7" IC packoffs. 17. NU BOPE. 18. Retrieve RTTS. 19. MU cement cleanout BHA. Drill cement retainer and clean out cement to 12.100 MD 20. Set whipstock. Mill window. 21. Drill 6" hole to TD. 22. Run Cr liner. ~~~ 23. Cement liner. Set liner top packer. Test liner to 3500 psi. 24. Perforate liner. 25. Set retrievable whipstock in seal receptacle at 11,932' MD. 26. Mill window. 27. Drill 6" open hole to TD. 28. Run slotted liner, leave TOL 10' outside window. 29. Retrieve whipstock and seal assembly. P£~ 30. R/U and run a 4-~/z", 12.6#, 13 Cr,~MTOP STADDLE completion w/ sliding ~ve and DCK shear out in GLM #4. Space out and land tubing. 31. Circulate freeze protect down IA. 32. Drop ball and rod to set packer. RILDS. 33. Individually test the tubing and annulus to 3500 psi for 30 minutes and record each test. When testing IA, assure tubing still pressured to 1500 psi to prevent DCK shear valve shearing. 34. Shear out DCK. 35. Install and test TWC test from below to 1000 psi through sheared DCK. 36. N/D the BOPE. N/U the adapter flange and tree and test tree and adapter to 5,000 psi with diesel. 37. RU DSM. Pull TWC. 38. Rig up flow path for IA freeze protect to U-tube the diesel freeze protect into place through the tree. 39. Install and test a BPV. 40. Secure well / RD and move-off well. Post-Rig Operations: 1. MI / RU slick line. Pull the ball and rod / RHC plug from landing nipple below the production packer. 2. With slickline, open lower lateral sliding sleeve. Run LEM. Open upper sliding sleeves. Retrieve LEM. 3. Install the well house, instrumentation, and flow line. <__/ilk Mel Rixse Operations Drilling Engineer CC: Well File Sondra Stewmanlferrie Hubble 41M8' CAM 6AD= FMC CTUATOR= BAKER B. H.EV = 71.2' F. ELE1/ = 37' OP= 1131' An9b = 50 ®8135' um MD = 11852' wn ND = 8800 SS M i rTi mt~n ~ = 3.725" ~ 71823' 4112" HES XN NIPPLE ST MD TVD DEV TYPE VLY LTCH PORT DATE 8 4072 3482 48 KBG-2LS DDM BTM 18 O5M 0188 5 8822 5189 48 KBG-2LS DDM BTM 18 05M0618 8131 8189 45 KBG-2LS DV BTM 0 05M0188 3 9208 N41 48 KBG2LS DOM BTM 18 05M0198 2 10280 7872 48 KBG•2LS DV BTM O 05/10198 1 11233 8328 48 KBG-2LS SIO BTM 24 05M0198 NO T@ PR OBLE3N MA NDRELS: RE 6iUIRE SPBC UL VA LVES D=3.819' x 4112' BKR S3 PKii, D 112'H~XNP. D=3.815' SAFETY NOTE: B RIJIDONG 1' BTM. LATYSI S'41 L 1 cLV's 64 a.D STYLEN8t:.2LS OLM'S: ~a-co oN RUNMNG NEADN®0 TO SEMOV®UP 112'.19lLL 0lV. > 70 Dom. ~ 12100' i > 90 OEO Q 12854'. GAS LP'f MANDRELS 4112' TBG,12.80, L-8D, .0152 bpf, D = 3.958' 11366' - T CSG 280X7' CSG 28E XO 11371' RA PP TAG H 17 782' ~ 7' X 41R' BKR ML PKR D = 9.880' H 11909' XXN PLUG N XN NP (SET 04!05198) (~ 11897' 7'X41I2'TWSSPKRD=9A78' 12229' ' TOPOF41ClSLOTT®L14R 12235' ' PERFORATK7N SUMMRRY REF LOG SLO1T®LIr13t ANGLEATTOP PERF: 70 ®11948' Note: Refer to Ptodue0on OB for historical pert doh SQE SPF NTE(iVAL DATE 5-41 L1 41/2' SLTO 11948-14005 O 04A2/98 5-41 4112' SLTD 12235 -13885 C 04105/98 11 T CSG MLLOUT W{~OW / 11882' -11905' (541 l1) 71921' BKR SEITNG SLV, D = 5.250' 11948' TOP OF 4111' SLTT) LNR ``~~ ~~ ~~~ ~~ ~~~ ~~ ~~ ~~ ~~ ~~~ ~~ ~~ ~~ • S~41 L1 M AN OH SLTT) LNR \ 1 ` WIO LNR TOP PKR OR HGR. WELL NOf WL ACCFS593LE 41?SLTD LNR72.8l,L-80,.0152bpf, D= 9.958' 14035' 1 1 1 1 1 ~` .` ~` ~ ~ ~`` ~`` .` .` ~~ ~~. .` ~` ~~. ~~ ~`` \ DATE REV 8Y ODN9ABYT3 DOTE UNR 0110Q198 ORIGN4AL COMPLETION 01A2A7 RCTITLH PROS GLV ODRR~710N WELL: S41L1 03126102 CHIKAK CORRBL'TDNS OSM9A8 SWC/TLH WRPPULL® PBiARNo: 1980250 10!06102 JAUKIC Vi91NER SAFETY NOTE AR Na 50028.22845.80 06102!03 PAIKAK WB.L NAME3APIf REV. SEC 35, T12N, R12E 4152' FSL 54504' FEL 02/21/06 RPHMLH WAN6tSFTY NOTEDaET® 11105)06 JLJRLH WRPSET BP C~pbretbn (Alaka) E _ - 41116" CNV .LHEAD= FMC ~ ~ A L 1 UATOR = BAKER ~ ~~ ELEV = 71.2' ELEV = 37' ~= 1131' Angle = 50 ~ 6135' O im MD = 11852' im TVD = 8800' SS 9-s/s° csG, 40#, L-80, ID = 8.835° ~--j 3332' Minimum ID = 3.725" ar 11937' 7" CSG zs# x T' csc zsn xo H 11371' SAFETY -2200' 4-112" HES X Nipple, ID = 3.813" GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LTCH PORT DATE 4 3742 3332 47 KBG-2LS BTM 0 3 7106 5566 48 KBG-2LS BTM 9716 7354 47 KBG-2LS BTM 0 1 11575 8752 62 KBG2LS BTM ~ 11660' 4-1/Z" HES X NIP, ID = 3.813" 11675' ~--{ 7" x 4-1 /2" HES TNT PKR, ID = 3.856" 11700' ' I 4-1 f2" HES X NIP, ID = 3.813" 11715' Side pocket rrmndrel for RA PIPTAG 11782' \ 7" CSG MLLOLIT WMDOMV 1 1897 -11905' (5-41 L1) 11921' BKR SETTING SLV, ID = 5.250° 11948' TOP OF 4112" SLID LNR _ ~~. ~~ ~~ PIP TAG ~ ~~ ~~ 4-1l2'_SLTD I,DiR'I .6#,L-80,.0152bpf, = 3.958" 11735' ~~ BKR 4-1/2" 13-Cr Sliding Sleeve 7" retr. w hipstock H -11,932' i~~. 1t2"SLTDLNR,12.6#,L-80,.0152bpf, ID=3.958" f--~ 1 ~- 11 937' 4-112" HES 9Cr XN NIP, ID = 3.725" 14035' ~ - /• Sx ' H D ZXB w Tie-back sleeve ID = 5.25' 11969' 4-112" TB .12.6#, 13 Cr-85, .0152 bpf, ID = 3.9 11979' 5x7" BAKER HMC Liner Hanger ID = 4.43" 11994' Top of Fish 9Z,1U9' T' X 4-12" TNV SS PKR, ID = 3.915" 12229' TOP OF 4-1/2"SLOTTED LINER 12235' I I I I~ T' CSG, 29/f, L-80, .0371 bpf, ID = 6.184° 12409' I ~ ~ - _ _ ~~ 41f2' SLID LNR, 12.8#, L-80, .0152 bpf, ID = 3.958" 13867 ~ 15,392' ~ DATE REV BY COMMENTS DATE REV BY COMMENTS PRIAHOE BAY LSAT 04/02/96 ORIGINAL COMPLETION 01/02/07 RCT/TLH PROS GLV CORRECTION WELL: S- 41 A & A L1 03/26102 CWKAK CORRECTIONS 05/13/08 SWC/TLH WRP PULLED PERMT ~= ti~`~ 10!06/02 JAUKK WANER SAFETY NOTE API No. 50-029-22645- 05/02/03 PP/KAK WELL NAMEBAR# REV_ SEC 35, T72N, R12E, 4157 FSL 84504' FEL 02/21!06 RPl-VTLH WANER SFTY NOTE DELETED Cc,' ~~"^ , • ^uR A a^d A!_1 New Sae' ...., ~ 8P Exploration (Alaska) 7"whipstock _ --12,022' Perf's for cement sqz -12,185' Permanent Bridge Rug --12,000' 4-1 /2" Solid LNR,12.6#,13-Cr 85: ID = 3.958" rD.- iff PERMIT DATA 96-025 GR/POL 96-025 NGP - MD 96-025 NGP - TVD AOGCC Individual Well Geological Materials Inventory 96-025 7593 T DATA PLUS '~'9408-14085 7153-8940 Page: 1 Date: 04/20/98 RUN RECVD 1 04/09/96 FINAL 12/05/96 FINAL 12/05/96 01/29/97 10-407 ~CoMPLETION DATE <-// ,~ / a/~/ >/~/,~// ~'~/ DAILY WELL OPS R ~I~.3-I~(~I TO ~/3 I t~ I ~?I?~ I~[~ I Are dry ditch samples re~ired? yes ~ ~d received? ..~~~--~ Was the well cored? yes ~~alysis & description receive~~s~ ..... ~o Are well tests required? lyes ~__~Received? Well is in compliance ~ Initial COMMENTS Y~ CI F! I I--I--I IM G S E I::! ~dl r' E S WELL LOG TRANS~AL To: State of Alaska January 29, 1997 Alaska Oil and Gas Conservation Comm. q~c~r~ c~/ Attn.: Lori Taylor 3001Porcupine Dr. ~,Lo/C)~~'4~ 6~(p,5 4,'-)4]09 Anchorage, Alaska 99501 MWD Formation Evaluation Logs - S-41 & S-4 IL1 AK-MW-60027 The technical data listed below is being submitted herewith. Please acknowledge receipt by returning a signed copy of this transmittal letter to the attention of.' Jim Galvin, Sperry-Sun Drilling Services, 5631 Silverado Way, #G, Anchorage, AK 99518 2 LDWG formatted LIS tapes with verification listing. API#: 50-029-22645-00 & 50-029-22645-60 respectively. 5631 Silverado Way, Suite G · Anchorage, Alaska 99518 ° (9.07) 563-3256 ° Fax (907) 563-7252 A Dresser Industries, Inc. Company STATE OF ALASKA ALASKA- ,J~L AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG 1. Status of Well Classification of Service Well [] Oil [] Gas [] Suspended [] Abandoned [] Service 2. Name of Operator 7. Permit Number BP Exploration (Alaska) Inc. 96-025 96-078 3. Address 8. APl Number P.O. Box 196612, Anchorage, Alaska 99519-6612 ~_---~.~..~.~.~.~,~ 50-029-22645-60 ~"~ r~,.- ,~"~ ',-"'-~ 4. Location ofwell atsufface ~.:~'~'~:'~ 9. Unit or Lease Name ~ .... ~-~,~ '--~ Prudhoe Bay Unit 4152' NSL, 4504' WEE, SEC. 35, T12N, R12E ~. ~;0,~,~;,!.~.~0~,~ ~ -~ ~~ At top of productive interval '~ . ~ .... ' ~j~-~...- ,: 10. Well Number 3470' NSL, 1061' EWL, SEC. 25, T12N, R12E;! ........ ~ 11. Field and Pool At total depth .~,/,.~_'~!,,~ 4146' NSL, 3064' EWL, SEC. 25, T12N, R12~,~.~.~_ _~.,~-'~ i Prudhoe Bay Field / Prudhoe Bay 5. Elevation in feet (indicate KB, DF, etc.) 16. Lease'D~'§~grtation and Serial No. Pool KBE = 71.20I ADL 028257 12. Date Spudded03/24/96 113' Date T'D' Reached 114' Date Comp" Susp" or Aband'115' Water depth' if offshore 116' NO' of Completions03/29/96 04/02/96 N/A MSLI One 17. Total Depth (MD+TVD)! 18. Plug Back Depth (MD+TVD)I19. Directional Surveyl20. Depth where SSSV set~l. Thickness of Permafrost 14085 8940 f~ .~ 14085 8940 ftI [~Yes I-INoI "2215' MD! 1900'(Approx.) 22. Type Electric or Other Logs Run MWD, DIFL, AC, GR, DIL, ZDEN, LWD, 23. CASING, LINER AND CEMENTING RECORD CASING SE'I-I'ING DEPTH HOLE SIZE WT. PER FT. GRADE TOP BO'I-I'OM SIZE CEMENTING RECORD AMOUNT PULLED 20" 91.5# H-40 Surface 80' 30" 260 sx Arctic Set (Approx.) 9-5/8" 40# L-80 34' 3332' 12-1/4" 1067 sx CS III, 272 sx 'G', 30 sx CS II 7" 26#/29# L-80 33' 11892' 8-1/2" 360sxClass'G',212sx'G' 4-1/2" 12.6# L-80 /11921' /14035' 6" Uncemented Slotted Liner 24. Perforations open to Production (MD+TVD of Top and Bottom 25. TUBING RECORD and interval, size and number) S~ZE DEPTH SET (MD) PACKER SET (MD) 4-1/2" Slotted Liner 4-1/2" 11909'- 11931' 11909' MD TVD MD TVD 4-1/2" 11367' 11311' / ~.'11948' - 14005' 8910' - 8945' v' 26. ACID, FRACTURE, CEMENT SQUEEZE, ETC. DEPTH INTERVAL (MD) AMOUNT & KIND OF MATERIAL USED Freeze Protect with 80 Bbls Diesel 27. PRODUCTION TEST Date First Production IMethod of Operation (Flowing, gas lift, etc.) MAY 12, 1996 I Gas Lift Date of Test Hours Tested PRODUCTION FOR OIL-BBL GAS-MCF WATER-BBL CHOKE SIZE I GAS-OIL RATIO TEST PERIOD I~ I Flow Tubing Casing Pressure CALCULATED BI~ OIL-BBL GAS-MCF WATER-BBL OIL GRAVITY-APl (CORR) Press. 24-HOUR RATE 28. CORE DATA Brief description of lithology, porosity, fractures, apparent dips and presence of oil, gas or water. Submit core chips. O R I GI NAI- ECEtVED MAY ~. 9 199G Form 10-407 Rev. 07-01-80 Submit In Duplicate Geologic Marker~. 30. Formation Tests Measured True Vertical Include interval tested, pressure data, all fluids recovered Marker Name Depth Depth and gravity, GOR, and time of each phase. Sag River 11880' 8883' Sag River 14040' 8943' 31. List of Attachments Summary of Daily Drilling Reports, Surveys, Annular Pumping Report 32. I hereby certify that the/J~going is tr~a. nd~o/rrect to the best of my knowledge Signed DanStoltz ~"' -~'~--:'/~--~'?//'/ .~_~_.~_.v,~-~.~~' Title Senior Drilling Engineer Date Prepared By Name/Number Terrie Hut~ble, 564-4628 INSTRUCTIONS GENERAL: This form is designed for submitting a complete and correct well completion report and Icg on all types of lands and leases in Alaska. ITEM 1: Classification of Service Wells: Gas injection, water injection, steam injection, air injection, salt water disposal, water supply for injection, observation, injection for in-situ combustion. ITEM 5: Indicate which elevation is used as reference (where not otherwise shown) for depth measurements given in other spaces on this form and in any attachments. ITEM 16 AND 24: if this well is completed for separate production from more than one interval (multiple completion), so state in item 16, and in item 24 show the producing intervals for only the interval reported in item 27. Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval. ITEM 21: Indicate whether from ground level (GL) or other elevation (DF, KB, etc.). 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 27: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-In, Other-explain. ITEM 28: If no cores taken, indicate 'none'. R E C E IV E D MAY 1996 Form 10-407 Rev. 07-01-80 SUMMARY OF DALLY OPERATIONS SHARED SERVICES DRILLING - BPX / ARCO Well Name: Accept Date: S-41 & L1 Rig Name: Nabors 28E AFE: 02/24/96 Spud Date: 02/25/96 Release Date: 4P0753 04/02/96 Feb 25 1996 (1) Rigged up Divertor. Fill pits with Water based mud. Made up BHA no. 1 . Feb 26 1996 (2) Tested Divertor. Held safety meeting. Circulated at 110 ft. Drilled to 353 ft. Serviced Shaker discharge line. Drilled to 1820 ft. Feb 27 1996 (3) Drilled to 2455 ft. Circulated at 2455 ft. Pulled out of hole to 1400 ft. R.I.H. to 2455 ft. Drilled to 3345 ft. Circulated at 3345 ft. Pulled out of hole to 800 ft. R.I.H. to 3345 ft. Circulated at 3345 ft. Pulled out of hole to 2500 ft. Held safety meeting. Pulled out of hole to 200 ft. Pulled BHA. Ser- viced Drillfloor / Derrick. Rigged up Casing handling equipment. Held safety meeting. Ran Casing to 800 ft (9.625 in OD). Feb 28 1996 (4) Ran Casing to 3331 ft (9.625 in OD). Circulated at 3331 ft. Held safety meeting. Pumped spacers - volume 75 bbl. Mixed and pumped slurry - 365 bbl. Mixed and pumped slurry - 55.7 bbl. Displaced slurry - 246 bbl. Rigged down Casing handling equip- ment. Held safety meeting. Rigged down Divertor. Mixed and pumped slurry - 30 bbl. Installed Casing spool. Rigged up All functions. Tested All functions. Held drill (Accumulator). Serviced Drillfloor / Derrick. Made up BHA no. 2. Feb 29 1996 (5) Made up BHA no. 2. R.I.H. to 3200 ft. Circulated at 3200 ft. Tested Casing - Via annulus and string. Held drill (Kick (well kill)). Drilled cement to 3331 ft. Drilled to ' 3355 ft. Per- formed formation integrity test. Drilled to 4271 ft. Circulated at 4271 ft. Drilled to 4349 ft. Circulated at 4349 ft. Drilled to 4813 ft. Circulated at 4813 ft. Pulled out of hole to 3330 ft. R.I.H. to 4813 ft. Mar I 1996 (6) R.I.H. to 4813 ft. Drilled to 5767 ft. Circulated at 5767 ft. Pulled out of hole to 200 ft. Pulled BHA. Serviced Kelly/top drive hose. Made up BHA no. 3. Serviced Drillfloor / Derrick. R.I.H. to 3330 ft. Serviced Block line. R.I.H. to 5767 ft. Drilled to 6260 ft. RECEIVED Operations Summary for: ~ , & S-41L1 Mar 2 1996 (7) Drilled to 6279 ft. Circulated at 7279 ft. Pulled out of hole to 5500 ft. R.I.H. to 7279 ft. Drilled to 8265 ft. Mar 3 1996 (8) Drilled to 8710 ft. Pulled out of hole to 7267 ft. R.I.H. to 8710 ft. Drilled to 10047 ft. Pulled out of hole to 8603 ft. R.I.H. to 10047 ft. Drilled to 10142 ft. Mar 4 1996 (9) Drilled to 10790 ft. Circulated at 10790 ft. Drilled to 10946 ft. Held safety meeting. Circulated at 10946 ft. Pulled out of hole to 6900 ft. R.I.H. to 10946 ft. Drilled to 11770 ft. Mar 5 1996 (10) Drilled to 12286 ft. Serviced Liner. Drilled to 12360 ft. Cir- culated at 12360 ft. Pulled out of hole to 11083 ft. Pumped out of hole to 10935 ft. Pulled out of hole to 9335 ft. R.I.H. to 12180 ft. Washed to 12360 ft. Circulated at 12360 ft. Pulled out of hole to 10000 ft. Mar 6 1996 (11) Pulled out of hole to 130 ft. Pulled BHA. Serviced Drillfloor / Derrick. Held safety meeting. Ran electric logs. Rigged down Rigging equipment. Removed Bore protector. Tested All func- tions. Installed Bore protector. R.I.H. to 130 ft. Pulled BHA. Held safety meeting. Made up BHA no. 4. R.I.H. to 3330 ft. Held safety meeting. Serviced Block line. R.I.H. to 11750 ft. Reamed to 11825 ft. Mar 7 1996 (12) Reamed to 12360 ft. Circulated at 12360 ft. Pulled out of hole to 150 ft. Pulled BHA. Rigged up Logging/braided cable equip- ment. Ran electric logs. Rigged down Wireline units. Held safety meeting. Ran Drillpipe to 2800 ft (5 in OD). Ran Drillpipe in stands to 9000 ft. Mar 8 1996 (13) Ran Drillpipe in stands to 12360 ft. Circulated at 12360 ft. Pumped spacers - volume 25 bbl. Mixed and pumped slurry- 171 bbl. Displaced slurry - 173 bbl. Pulled Drillpipe in stands to 10620 ft. Circulated at 10620 ft. Pulled Drillpipe in stands to 2063 ft. Circulated at 2063 ft. Ran Drillpipe in stands to 9600 ft. Page 2 RECEIVED MAY ?. 9 199~; Al~k~ Oil & 9~ Coa~. Cm-arnissior~ Operations Summary for: ; & S-41L1 Mar 9 1996 (1) Ran Drillpipe in stands to 10620 ft. Circulated at 10620 ft. Pumped spacers - volume 25 bbl. Mixed and pumped slurry- 100 bbl. Displaced slurry - 163.5 bbl. Pulled Drillpipe in stands to 8700 ft. Circulated at 8700 ft. Pulled Drillpipe in stands to 0 ft. Retrieved Wear bushing. Tested BOP stack. Installed Wear bushing. Made up BHA no. 1. R.I.H. to 9204 ft. Reamed to 9468 ft. Pulled out of hole to 666 ft. Pulled BHA. Mar 10 1996 (2) Pulled BHA. Serviced Block line. Made up BHA no. 2. R.I.H. to 9365 ft. Washed to 9419 ft. Pulled out of hole to 600 ft. Laid down fish. Made up BHA no. 3. R.I.H. to 9385 ft. Reamed to 9439 ft. Drilled cement to 9470 ft. Drilled to 9555 ft. Mar 11 1996 (3) Drilled to 9662 ft. Serviced Bell nipple. Drilled to 9714 ft. Circulated at 9714 ft. Pulled out of hole to 660 ft. Pulled BHA. Serviced Bell nipple. Made up BHA no. 4. R.I.H. to 9630 ft. Reamed to 9714 ft. Drilled to 9940 ft. Mar 12 1996 (4) Drilled to Made up to 9960 9960 ft. Circulated at 9960 ft. Pulled out of hole to 666 ft. Pulled BHA. BHA no. 5. R.I.H. to 3300 ft. Serviced Block line. R.I.H. to 9821 ft. Reamed ft. Drilled to 10182 ft. Mar 13 1996 (5) Drilled to 11052 ft. Mar 14 1996 (6) Drilled to 11169 ft. Circulated at 11169 ft. Pulled out of hole to 10044 ft. R.I.H. to 11169 ft. Circulated at 11169 ft. Pulled out of hole to 656 ft. Pulled BHA. Installed Wear bush- lng. Made up BHA no. 6. Serviced Travelling block. R.I.H. to 11021 ft. Reamed to 11169 ft. Drilled to 11253 ft. Mar 15 1996 (7) Drilled to 11805 ft. Mar 16 1996 (8) Drilled to 12046 ft. Circulated at 12046 ft. Pulled out of hole to 650 ft. Pulled BHA. Tested BOP stack. Installed Wear bush-lng. Made up BHA no. 7. R.I.H. to 3330 ft. Serviced Block line. R.I.H. to 9200 ft. RECEIVED Page 3 MAY 2.~ 1996 Aia,ka Oil & (~as Con~. Commission Anch0r~ge Operations Summary for: L & S-41L1 Mar 17 1996 (9) R.I.H. to 11366 ft. Reamed to 12046 ft. Drilled to 13323 ft. Mar 18 1996 (10) Drilled to 12360 ft. Circulated at 12360 ft. Drilled to 12418 ft. Circulated at 12418 ft. Pulled out of hole to 650 ft. Pulled BHA. Made up BHA no. 8. R.I.H. to 11233 ft. Reamed to 12418 ft. Circulated at 12148 ft. Mar 19 1996 (11) Circulated at 12418 ft. Laid down 11768 ft of 5 in OD drill pipe. Pulled BHA. Tested Top ram. Rigged up Casing handling equipment. Held safety meeting. Ran Casing to 12408 ft (7 in OD). Circulated at 12408 ft. Mar 20 1996 (12) Circulated at 12408 ft. Pumped spacers - volume 70 bbl. Mixed and pumped slurry - 179 bbl. Mixed and pumped slurry - 45 bbl. Displaced slurry - 450.4 bbl. Rigged down Casing handling equip- ment. Installed Seal assembly. Rigged up All rams. Tested All rams. Installed Wear bushing. Made up BHA no. 9. Singled in drill pipe to 7000 ft. Serviced Block line. Singled in drill pipe to 12263 ft. Drilled cement to 12320 ft. Tested Casing -Via annulus and string. Drilled installed equipment- Float shoe. Mar 21 1996 (13) Drilled installed equipment - Float shoe. Drilled to 12426 ft. Circulated at 12426 ft. Drilled to 12459 ft. Functioned downhole tools at 12459 ft. Drilled to 12491 ft. Circulated at 12491 ft. Pulled out of hole to 12000 ft. R.I.H. to 12354 ft. Logged hole with LWD: Formation evaluation (FE) from 12354 ft to 12491 ft. Drilled to 13132 ft. Circulated at 13132 ft. Logged hole with LWD: Formation evaluation (FE) from 13132 ft to 12950 ft. Mar 22 1996 (14) Logged hole with LWD: Formation evaluation (FE) from 13132 ft to 11743 ft. Pulled out of hole to 150 ft. Pulled BHA. Removed Bore protector. Installed Bore protector. Rig waited: Orders. Made up BHA no. 10. R.I.H. to 13132 ft. Drilled to 13671 ft. Page 4 RECEIVED MAY 2 9 1996 Alaska 011 & Gas Cons. Commission Anchorage Operations Summary for: , & S-41L1 Mar 23 1996 (15) Drilled to 13867 ft. Circulated at 13867 ft. Pulled out of hole to 12408 ft. R.I.H. to 13867 ft. Circulated at 13867 ft. Logged hole with LWD: Formation evaluation (FE) from 13867 ft to 12994 ft. Pulled out of hole to 150 ft. Pulled BHA. Held safe- ty meeting. Ran Casing to 1650 ft (4.5 in OD). Held safety meeting. Rigged up sub- surface equipment - Liner hanger. Ran Casing in stands to 13867 ft. Circulated at 12228 ft. Set Per- manent packer at 12228 ft with 3000 psi. Tested Permanent packer- Via annulus. Mar 24 1996 (16) Tested Permanent packer- Via annulus. Circulated at 12138 ft. Held safety meeting. Serviced Block line. Pulled Drillpipe in stands to 30 ft. Pulled Casing in stands to 30 ft. Rigged down Casing handling equipment. Tested All functions. Mar 24 1996 (1) Installed Bore protector. Rigged up Logging/braided cable equip- ment. Conduct braided cable operations - 5/16 size cable. Rigged up sub-surface equipment- Setting tools. Conduct braided cable operations - 7/32 size cable. Rigged down Logging/braided cable equipment. Made up BHA no. 1 . Mar 25 1996 (2) Made up BHA no. 1 . R.I.H. to 11909 ft. Circulated at 11909 ft. Functioned downhole tools at 11909 ft. Milled Casing at 11921 ft. Circulated at 11921 ft. Pulled out of hole to 80 ft. Pulled BHA. Made up BHA no. 2. Serviced Drillfloor / Derrick. R.I.H. to 11921 ft. Mar 26 1996 (3) Functioned downhole tools at 11905 ft. Reamed to 11921 ft. Drilled to 12017 ft. Circulated at 11835 ft. Pulled out of hole to 8500 ft. Serviced Drillstring handling equipment. Pulled out of hole to 8000 ft. Serviced Drillstring handling equipment. Pulled out of hole to 60 ft. Pulled BHA. Made up BHA no. 3 . R.I.H. to 12017 ft. Drilled to 12368 ft. Mar 27 1996 (4) Drilled to 12688 ft. Circulated at 12688 ft. Pulled out of hole to 30 ft. Made up BHA no. 4. R.I.H. to 11900 ft. Serviced Block line. R.I.H. to 12688 ft. Drilled to 12959 ft. Pulled out of hole to 11900 ft. Mar 28 1996 (5) Pulled out of hole to 11900 ft. Rig waited: Unsafe to continue operation. Singled in drill pipe to 12959 ft. Drilled to 13170 ft. Pulled out of hole to 11650 ft. 13170 ft. Drilled to 13423 ft. Circulated at 13423 ft. Pulled out of I~1~ (~ Page 5 Operations Summary for: [ & S-41L1 Mar 29 1996 (6) Pulled out of hole to 50 ft. Pulled BHA. Made up BHA no. 5 . Removed Bore protector. Installed Bore protector. Repaired De- gasser. R.I.H. to 13423 ft. Drilled to 14085 ft. Circulated at 14085 ft. Mar 30 1996 (7) Circulated at 14085 ft. Pulled out of hole to 11900 ft. Ser- viced BOP stack. R.I.H. to 14031 ft. Circulated at 14041 ft. Pulled out of hole to 13000 ft. R.I.H. to 1031 ft. Washed to 14044 ft. Circulated at 14031 ft. Pulled out of hole to 160 ft. Pulled BHA. Serviced Bottom ram. Held safety meeting. Ran Cas- ing to 2160 ft (4.5 in OD). Held safety meeting. Ran Casing to 2160 ft (4.5 in OD). Ran Tubing to 2160 ft (2.0625 in OD). Rigged up sub-surface equipment - Setting tools. Ran Drillpipe in stands to 4000 ft. Mar 31 1996 (8) Ran Drilipipe in stands to 11900 ft. Circulated at 11900 ft. Ran Drillpipe on landing string to 14030 ft. Set Liner hanger at 14034 ft with 0 psi. Held safety meeting. Circulated at 14034 ft. Pulled Drillpipe in stands to 11900 ft. Circulated at 11900 ft. Held safety meeting. Serviced Block line. Pulled Drillpipe in stands to 30 ft. Laid down 30 ft of Casing. Laid down 300 ft of Tubing. Held safety meeting. Laid down 2160 ft of Tubing. Made up BHA no. 6. R.I.H. to 2500 ft. Pulled out of hole to 2000 ft. Apr I 1996 (9) Pulled out of hole to 100 ft. Pulled BHA. Serviced Fluid sys- tem. R.I.H. to 10000 ft. Held safety meeting. R.I.H. to 11905 ft. Circulated at 119005 ft. Fished at 11905 ft. Flow check. Pulled out of hole to 120 ft. Pulled BHA. Serviced Drillfloor / Derrick. Installed Bore protector. Made up BHA no. 7. R.I.H. to 11728 ft. Held safety meeting. Laid down 7050 ft of 3.5 in OD drill pipe. Apr 2 1996 (10) Laid down 11700 ft of 3.5 in OD drill pipe. Removed Bore protec- tor. Serviced All functions. Rigged up Tubing handling equip- ment. Held safety meeting. Ran Tubing to 200 ft (4.5 in OD). Held safety meeting. Ran Tubing to 11365 ft (4.5 in OD). Installed Tubing hanger. Reverse circulated at 11365 ft. Set packer at 111314 ft with 4000 psi. Tested Tubing. Retrieved Drillpipe landing string. Installed Hanger plug. Held safety meeting. Rigged down BOP stack. Apr 3 1996 (11) Rigged down BOP stack. Installed All tree annulus valves. Freeze protect well - 80 bbl of Diesel. Removed Hanger plug. RECEIVED Page Alaska 0il & 13a~ C0n~. f,0mmis~ion Anchorage , , ................................ su, c.,.e, 3 3 31 Well Cum Total Cum Mu~Ctg ~ ~ · Cum ~ ~:~ ';.~, :,, ~ Cum Water Brine Cum Die~FP SOURCE WELL DATE OF ................. DIESE~ FREEZE I .... I COMPLICATIONS COMMENTS N~B~ I~ECTION MUD/CTG~ ~RINE WATER PROT ~ Dally ~um. ~ota~ , s-~ ~=o~ · ~ ~ ~.oo ~~~ ~oo s-~ ~==~ ~o.oo ~~ ~oo .s~ ...... SPE SUN DRILLING SERVICES ANCHOR3~GE ALASKA PAGE 1 SHARED SERVICES DRILLING PBU/S-41 L1 500292264560 NORTH SLOPE BOROUGH COMPUTATION DATE: 4/ 8/96 DATE OF SURVEY: 032996 ~/~.-O~~ MWD SURVEY JOB NUMBER: AK-MW-60027 KELLY BUSHING ELEV. = 71.20 FT. OPERATOR: BP EXPLORATION TRUE SUB-SEA MEASD VERTICAL VERTICAL DEPTH DEPTH DEPTH COURS INCLN DG MN COURSE DLS TOTAL DIRECTION RECTANGULAR COORDINATES DEGREES DG/100 NORTH/SOUTH EAST/WEST VERT. SECT. 11870.81 8879.49 8808.29 11892.00 8888.53 8817.33 11898.67 8891.25 8820.05 11904.78 8893.67 8822.47 11920.67 8900.06 8828.86 64 30 N 54.30 E .00 4593.15N 5558.58E 65 1 N 54.82 E 3.31 4604.26N 5574.20E 66 48 N 55.40 E 27.84 4607.75N 5579.19E 66 24 N 55.93 E 10.31 4610.91N 5583.82E 66 11 N 57.27 E 7.82 4618.92N 5595.97E 7183.66 7202.83 7208.91 7214.52 7229.07 11930.69 8904.01 8832.81 11962.92 8914.28 8843.08 11979.60 8917.82 8846.62 11994.49 8919.71 8848.51 12025.06 8920.64 8849.44 67 24 N 58.08 E 14.09 4623.84N 5603.75E 75 24 N 60.59 E 25.89 4639.39N 5630.01E 80 5 N 61.85 E 29.13 4647.24N 5644.29E 85 19 N 62.95 E 35.81 4654.08N 5657.37E 91 11 N 65.20 E 20.59 4667.43N 5684.84E 7238.27 7268.71 7284.92 7299.58 7329.77 12056.95 8920.14 8848.94 12089.08 8920.21 8849.01 12119.65 8920.91 8849.71 12151.62 8921.80 8850.60 12183.73 8922.23 8851.03 12215.82 8922.11 8850.91 12248.24 8921.87 8850.67 12280.45 8921.76 8850.56 12312.46 8921.79 8850.59 12344.75 8921.85 8850.65 90 35 N 65.70 E 2.45 4680.68N 5713.85E 89 8 N 63.90 E 7.21 4694.35N 5742.91E 88 15 N 61.10 E 9.61 4708.46N 5770.02E 88 33 N 58.50 E 8.18 4724.54N 5797.63E 89 54 N 57.50 E 5.26 4741.55N 5824.86E 90 31 N 57.60 E 1.93 4758.77N 5851.94E 90 20 N 57.80 E .83 4776.09N 5879.34E 90 1 N 58.20 E 1.57 4793.16N 5906.66E 89 52 N 58.30 E .57 4810.00N 5933.88E 89 54 N 57.60 E 2.17 4827.14N 5961.24E 7361.17 7392.86 7423.18 7455.04 7487.11 7519.18 7551.57 7583.75 7615.72 7647.98 12377.19 8921.79 8850.59 12409.04 8921.46 8850.26 12441.31 8920.95 8849.75 12473.40 8920.42 8849.22 12505.55 8919.80 8848.60 90 18 N 57.00 E 2.22 4844.66N 5988.54E 90 54 N 55.10 E 6.26 4862.45N 6014.96E 90 54 N 54.80 E .93 4880.98N 6041.37E 91 0 N 54.70 E .44 4899.50N 6067.58E 91 11 N 54.~90 E .88 4918.02N 6093.84E 7680.40 7712.24 7744.50 7776.59 7808.73 12537.74 8919.07 8847.87 12570.34 8918.53 8847.33 12602.14 8918.75 8847.55 12634.33 8919.82 8848.62 12665.55 8920.99 8849.79 12697.77 8921.84 8850.64 12729.74 8922.48 8851.28 12761.85 8923.57 8852.37 12793.81 8925.33 8854.13 12824.52 8927.25 8856.05 91 24 N 55.10 E .88 4936.48N 6120.20E 90 30 N 54.70 E 3.02 4955.22N 6146.87E 88 41 N 54.20 E 5.87 4973.71N 6172.74E 87 30 N 54.40 E 3.78 4992.48N 6198.86E 88 11 N 54.90 E 2.75 5010.53N 6224.31E 88 48 N 55.30 E 2.24 5028.96N 6250.72E 88 54 N 55.10 E .70 5047.20N 6276.97E 87 11 N 56.30 E 6.48 5065.28N 6303.48E 86 30 N 55.50 E 3.32 5083.17N 6329.90E 86 18 N 55.00 E 1.75 5100.64N 6355.08E 7840.91 7873.50 7905.29 7937.46 7968.65 8000.86 8032.83 8064.91 8096.82 8127.47 RECEIVED MAY 2 9 1996 Alaska 011 & ~a~ Cons. Commission Anchorage SPt SHARED SERVICES DRILLING PBU/S-41 L1 500292264560 NORTH SLOPE BOROUGH COMPUTATION DATE: 4/ 8/96 TRUE SUB-SEA MEASD VERTICAL VERTICAL DEPTH DEPTH DEPTH Y-SUN DRILLING SERVICES ANCHOR3~GE ALASKA COURS INCLN DG MN 12856.60 8929.10 8857.90 87 5 12888.52 8930.58 8859.38 87 35 12918.90 8931.98 8860.78 87 5 12951.09 8933.58 8862.38 87 11 12985.54 8935.05 8863.85 87 54 13017.76 8936.26 8865.06 87 48 13049.77 8937.38 8866.18 88 11 13083.07 8938.34 8867.14 88 30 13111.65 8939.11 8867.91 88 24 13176.42 8940.30 8869.10 89 30 13208.36 8940.27 8869.07 13240.59 8939.96 8868.76 13272.47 8939.88 8868.68 13304.61 8940.36 8869.16 13336.69 8941.25 8870.05 13368.77 8942.37 8871.17 13400.80 8943.68 8872.48 13433.92 8944.84 8873.64 13465.45 8945.64 8874.44 13497.50 8946.39 8875.19 13529.15 8946.97 8875.77 13561.20 8947.28 8876.08 13593.36 8947.51 8876.31 13625.29 8947.59 8876.39 13657.43 8947.51 8876.31 13689.81 8947.42 8876.22 13721.89 8947.37 8876.17 13754.01 8947.34 8876.14 13786.27 8947.34 8876.14 13817.05 8947.36 8876.16 PAGE DATE OF SURVEY: 032996 MWD SURVEY JOB NUMBER: AK-MW-60027 KELLY BUSHING ELEV. = 71.20 FT. OPERATOR: BP EXPLORATION 90 35 90 30 89 48 88 30 88 18 COURSE DLS TOTAL DIRECTION RECTANGULAR COORDINATES DEGREES DG/100 NORTH/SOUTH EAST/WEST VERT. SECT. N 54.90 E 2.51 5119.04N 6381.30E N 54.40 E 2.21 5137.48N 6407.31E N 55.90 E 5.20 5154.82N 6432.21E N 58.90 E 9.31 5172.14N 6459.29E N 61.20 E 6.97 5189.32N 6489.11E 8159.49 8191.38 8221.72 8253.85 8288.15 N 63.00 E 5.59 5204.39N 6517.56E N 64.10 E 3.65 5218.63N 6546.20E N 66.90 E 8.45 5232.44N 6576.49E N 68.20 E 4.56 5243.35N 6602.89E N 71.40 E 5.22 5265.70N 6663.66E 8320.12 8351.78 8384.55 8412.48 8475.19 N 75.00 E 11.79 N 78.10 E 9.62 N 81.00 E 9.36 N 84.20 E 10.75 N 87.20 E 9.37 87 41 N 89.20 E 6.51 87 35 N 89.10 E .44 88 24 N 89.70 E 3.02 88 41 S 89.50 E 2.71 88 35 S 89.40 E .44 5274.93N 6694.23E 5282.43N 6725.57E 5288.21N 6756.92E 5292.35N 6788.78E 5294.75N 6820.75E 8505.60 8535.65 8564.74 8593.32 8621.00 89 18 S 89.10 E 2.41 89 35 S 88.80 E 1.32 89 35 S 88.40 E 1.24 90 5 S 88.10 E 1.83 90 11 S 87.90 E .70 5295.76N 6852.79E 5296.23N 6884.79E 5296.58N 6917.89E 5296.53N 6949.41E 5296.22N 6981.45E 8647.95 8674.56 8702.00 8727.91 8754.11 90 5 S 88.00 E .44 90 5 S 87.90 E .31 90 0 S 88.00 E .44 90 0 S 87.90 E .31 89 54 S 87.70 E .73 5295.80N 7013.09E 5295.22N 7045.13E 5294.43N 7077.28E 5293.46N 7109.20E 5292.33N 7141.32E 8779.92 8805.96 8831.98 8857.69 8883.50 13849.16 8947.42 8876.22 89 54 S 86.90 E 2.49 13881.32 8947.50 8876.30 89 48 S 86.70 E .69 13913.30 8947.39 8876.19 90 35 S 87.30 E 3.13 13945.48 8946.75 8875.55 91 41 S 87.80 E 3.75 13977.76 8945.79 8874.59 91 41 S 87.40 E 1.24 5291.18N 7173.67E 8909.47 5290.03N 7205.73E 8935.21 5288.88N 7237.83E 8960.98 5287.73N 7270.07E 8986.86 5286.54N 7300.83E 9011.51 5285.03N 7332.90E 9037.05 5283.24N 7365.01E 9062.46 5281.56N 7396.95E 9087.80 5280.19N 7429.09E 9113.48 5278.84N 7461.33E 9139.25 RECEIVED MAY 9 1996 Nlltk~ 011 & I~ Con~. Commlfmion Anahorage SP1 .Y-SUN DRILLING SERVICES ANCHORAGE ALASKA PAGE 3 SHARED SERVICES DRILLING DBU/S-41 Al 500292264560 NORTH SLOPE BOROUGH COMPUTATION DATE: 4/ 8/96 DATE OF SURVEY: 032996 MWD SURVEY JOB NUMBER: AK-MW-60027 KELLY BUSHING ELEV. = 71.20 FT. OPERATOR: BP EXPLORATION TRUE SUB-SEA COURS COURSE DLS TOTAL MEASD VERTICAL VERTICAL INCLN DIRECTION RECTANGULAR COORDINATES VERT. DEPTH DEPTH DEPTH DG MN DEGREES DG/100 NORTH/SOUTH EAST/WEST SECT. 14008.17 8944.60 8873.40 92 48 S 87.10 E 3.75 14029.85 8943.35 8872.15 93 48 S 87.60 E 5.15 14085.00 8939.69 8868.49 93 48 S 87.60 E .00 5277.38N 7491.68E 9163.40 5276.38N 7513.30E 9180.63 5274.07N 7568.28E 9224.58 THE CALCULATION PROCEDURES ARE BASED ON THE USE OF THREE-DIMENSION MINIMUM CURVATURE METHOD. HORIZONTAL DISPLACEMENT = 9224.68 FEET AT NORTH 55 DEG. 7 MIN. EAST AT MD = 14085 VERTICAL SECTION RELATIVE TO WELL HEAD VERTICAL SECTION COMPUTED ALONG 55.40 DEG. TIE IN POINT 11870.81 WINDOW POINT 11892' INTERPOLATED DEPTH 14085' RECEIVED MAY ;~ 9 1996 Alaska 011 & Gas Cons. Commission Anchorage SP. °Y-SUN DRILLING SERVICES ANCHORAGE ALASKA PAGE 4 SHARED SERVICES DRILLING PBU/S-41 L1 500292264560 NORTH SLOPE BOROUGH COMPUTATION DATE: 4/ 8/96 DATE OF SURVEY: 032996 JOB NUMBER: AK-MW-60027 KELLY BUSHING ELEV. = 71.20 FT. OPERATOR: BP EXPLORATION INTERPOLATED VALUES FOR EVEN 1000 FEET OF MEASURED DEPTH TRUE SUB-SEA MEASD VERTICAL VERTICAL DEPTH DEPTH DEPTH TOTAL RECTANGULAR COORDINATES MD-TVD VERTICAL NORTH/SOUTH EAST/WEST DIFFERENCE CORRECTION 11870.81 8879.49 8808.29 12870.81 8929.82 8858.62 13870.81 8947.47 8876.27 14085.00 8939.69 8868.49 4593.15 N 5558.58 E 2991.32 5127.20 N 6392.91 E 3940.99 949.67 5283.84 N 7354.52 E 4923.34 982.35 5274.07 N 7568.28 E 5145.31 221.97 THE CALCULATION PROCEDURES ARE BASED ON THE USE OF THREE-DIMENSION MINIMUM CURVATURE METHOD. RECEIVED MAY 2 9 199~; SP~ ~Y-SUN DRILLING SERVICES ANCI~OP~AGE ALASKA PAGE 5 SHARED SERVICES DRILLING PBU/S-41 L1 500292264560 NORTH SLOPE BOROUGH COMPUTATION DATE: 4/ 8/96 DATE OF SURVEY: 032996 JOB NUMBER: AK-MW-60027 KELLY BUSHING ELEV. = 71.20 FT. OPERATOR: BP EXPLORATION INTERPOLATED VALUES FOR EVEN 100 FEET OF SUB-SEA DEPTH TRUE SUB-SEA MEASD VERTICAL VERTICAL DEPTH DEPTH DEPTH TOTAL RECTANGULAR COORDINATES MD-TVD VERTICAL NORTH/SOUTH EAST/WEST DIFFERENCE CORRECTION 11870.81 8879.49 8808.29 14085.00 8939.69 8868.49 4593.15 N 5558.58 E 2991.32 5274.07 N 7568.28 E 5145.31 2153.99 THE CALCULATION PROCEDURES USE A LINEAR INTERPOLATION BETWEEN THE NEAREST 20 FOOT MD (FROM MINIMUM CURVATURE) POINTS RECEIVED Oil & ~as Cons. Corn · . Anchorage- LARRY GRANT Attn. ALASKA OIL + GAS CONSERVATION 3001 PORCUPINE DRIVE ANCHORAGE AK, 99501. Date: 1 April 1996 RE: Transmittal of Data Sent by: HAND CARRY Dear Sir/Madam, Enclosed, please find the data as described below: WELL DESCRIPTION PFC/PERF FINAL BL+RF PFC/PERF FINAL BL+RF PFC/PERF FINAL BL+RF PFC/PERF FINAL BL+RF PFC/PERF FINAL BL+RF GR/CCL FINAL BL+RF ECC NO. Run # 1 1984.06 Run # 1 4735.03 Run # 1 5746.06 Run ~ 1 6103.04 Run # 1 6631.00 Run # 1 6633.00 Please sign and return to: Attn. Rodney D. Paulson Western Atlas Logging Services 5600 B Street Suite 201 , Anchoraae, AK 99518 Or FAX o (907) 563-7803 · ~ ,, STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVALS 1. Type of Request: Abandon __ Suspend __ Operation Shutdown __ Re-enter suspended well __ Alter casing __ Repair well __ Plugging __ Time extension __ Stimulate __ Change approved program x Pull tubing __ Variance__ Perforate__ Other__ 2. Name of Operator BP Exploration 3. Address P. O. Box 196612, Anchorage, Alaska 99519-6612 4. Location of well at surface 4152' NSL, 4504' WEL, SEC. 35, T12N, R12E 5. Type of Well: Development x Exploratory __ Stratigraphic __ Service 6. Datum elevation (DF or KB) KBE = 70.2 7. Unit or Property name Prudhoe Bay Unit 8. Well number S-41L1 At top of productive interval 9. ORIGINAL At effective depth (Preliminary) At total depth 4146' NSL, 3064' EWL, SEC. 25, T12N, R12E Permit number 96-O25 10. APl number 50- 029-22645-60 11. Field/Pool Prudhoe Bay Field/Oil Pool feet 12. Present well condition summary Total depth: measured true vertical Effective depth: measured true vertical 14085 feet 8943 feet 14085 feet 8943 feet Plugs (measured) Junk (measured) Casing Length Size Cemented Structural Conductor 80' 20" 260 sx Arctic Set (Approx.) Surface 3279' 9-5/8" Intermediate Production 11888' 7" 572 sx 'G' Liner 2107' 4-1/2" Uncemented SIotted Liner Perforation depth: measured Slotted Liner true vertical Tubing (size, grade, and measured depth) 4-1/2", 12.6#, L-80 to 11365' (Preliminary Information) Packers and SSSV (type and measured depth) Packerat 11314' (Preliminary Information) Measured depth 110' 3331' 11921' 14O35' True verticaldepth 110' 3045' 8900' 8940' APR 0 4 1996 Ajaska Oil & Gas Cons. Commission Anchorage 13. Attachments Description summary of proposal X Detailed operations program __ BOP sketch 14. Estimated date for commencing operation April2, 1996 16. If proposal was verbally approved ~- d(~,~ Name of approver Jack Hartz ~ 04/02/96 Date approved 15. status of well classification as: Oil X Gas Suspended__ Service 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Signed Title Senior Drilling Engineer FOR COMMISSION USE ONLY Date Conditions of approval: Notify Commission so representative may witness Plug integrity __ BOP Test __ Location clearance __ Mechanical Integrity Test~ S~i.i~[~I~ ~r~.~,~n i,red lO- Bavid W, Johnston Approved by order of the Commission I Approval No, ~ ~ . ~'7~ /_..~O7 Approved Cdpy p,p..turned Commissioner-' Date ¢//0/~'~ Form 10-403 Rev 06/15/88 SUBMIT IN TRIPLICATE BP EXPLORATION ARCO Alaska, Inc. A Date: Subject: April 2, 1996 S-41L1 Wellbore Extension The S-41L1 (upper Sag River lateral) wellbore was extended 338' beyond it's permitted horizontal length due to a change in trajectory. The trajectory change was initiated to: (1) increase stand-off from a nearby large (100' throw) fault; and, (2) to increase the overall length and effective drainage area in the reservoir. The decision for the turn and extension was made "on the fly" as drilling operations and downhole conditions were optimal for the change in plans. Because no additional trips were required to attain this additional footage, impact to overall cost was minimal. Verbal approval was granted by Jack Hartz at 2:55 PM on 4/2/96 for the extension. Projected Bottom Hole Location based on preliminary survey data: Measured Depth: Total Vertical Depth: 14,085' X = 626,410' 8,939' Y = 5,985,751' 93.8° Inclination, 92.4° Azimuth, Closure = 9,224' at 55.1° Final corrected bottom hole location will be submitted with the Final Completion Report and Directional Survey. If you have any questions or require additional information, please contact the undersigned. Tim Burns 28-E Operations Drilling Engineer cc: Well File ~,PR 04 1996 Alaska Oil & Gas Cons. CoFnmission Anchorage STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVALS 1. Type of Request: Abandon. Suspend Operation Shutdown Re-enter suspended well Alter casing. Repair well Plugging Time extension Stimulate. Change approved program X Pull tubing Variance Perforate Other~ 2. Name of Operator 5. Type of Well: 6. Datum elevation (DF or KB) BP Exploration Development × KBE = 70.2 feet Exploratory .__ 3. Address Stratigraphic~ 7. Unit or Property name P. O. Box 196612, Anchorage, Alaska 99519-6612 service ~ Prudhoe Bay Unit 4. Location of well at surface 8. Well number 4152' NSL, 4504' WEL, SEC. 35, T12N, R12E At top of productive interval At effective depth At total depth 4146' NSL, 3064' EWL, SEC. 25, T12N, R12E (Preliminary) S-41L 1 9. Permit number 96-025 10. APl number 50- 029-22645-60 11. Field/Pool Prudhoe Bay Field/Oil Pool 12. Present well condition summary Total depth: measured true vertical Effective depth: measured true vertical Casing Structural Conductor Surface Intermediate Production Liner Perforation depth: 14085 feet 8943 feet 14085 feet 8943 feet Plugs (measured) Junk (measured) Length Size Cemented 80' 20" 260 sx Arctic Set (Approx.) 3279' 9-5/8" 11888' 7" 572 SX 'G' 2107' 4-1/2" Uncemented Slotted Uner measured Slotted Liner true vertical Tubing (size, grade, and measured depth) 4-1/2", 12.6#, L-80 to 11365' (Preliminary Information) Packers and SSSV (type and measured depth) Packerat 11314' (Preliminary Information) Measured depth 110' 3331' 11921' 14035' True vertical depth 110' 3045' 8900' 8940' ,PR 04 1 96 Alaska Oi! & Gas Cons. Commission Anchorage 13. Attachments Description summary of proposal × Detailed operations program BOP sketch 14. Estimated datefor commencing_operation April2, 1996 16. if proposal was verbally approved ~.~ ~I~ Name of approver Jack Hartz 04/02/96 Date approved 15. Status of well classification as: Oil X Gas Suspended__ Service 17. I hereby ~ that the~rue and correct to the best of my knowledge. Signed /~.,~,~..r~,..~,~..c~ TitleSeniorOdllin~lEn~lineer FOR COMMISSION USE ONLY Conditions of approval: Notify Commission so re~ntafiv~~ness Plug integrity BOP~T-e~ ~",L,(Ycation cleai)[~-~'"'~ __ _ Mechanical I~t~n-i~i~- ~/~0 ~/' Approved by order of the Co~.-- Form 10-403 Rev 06/15/88 '~'- ~ Date ~-/'-//-- ?G J Approve, No. ff~. ~7=~ Commissioner SUBMIT IN TRIPLICATE BP EXPLORATION ARCO Alaska, Inc. A Date: Subject: April 2, 1996 S-41L1 Wellbore Extension The S-41L1 (upper Sag River lateral) wellbore was extended 338' beyond it's permitted horizontal length due to a change in trajectory. The trajectory change was initiated to: (1) increase stand-off from a nearby large (100' throw) fault; and, (2) to increase the overall length and effective drainage area in the reservoir. The decision for the turn and extension was made "on the fly" as drilling operations and downhole conditions were optimal for the change in plans. Because no additional [rips were required to attain this additional footage, impact to overall cost was minimal. Verbal approval was granted by Jack Hartz at 2:55 PM on 4/2/96 for the extension. Projected Bottom Hole Location based on preliminary survey data: Measured Depth: Total Vertical Depth: 14,085' X = 626,410' 8,939' Y = 5,985,751' 93.8° Inclination, 92.4° Azimuth, Closure = 9,224' at 55.1° Final corrected bottom hole location will be submitted with the Final Completion Report and Directional Survey. If you have any questions or require additional information, please contact the undersigned. Tim Bums 28-E Operations Drilling Engineer cc: Well File ~,PR 0 4 1996 Alaska Oil & Gas Cons. Comrr, dssion Anchorage ·. . .. ALASKA OIL AND GAS CONSERVATION COMMISSION February 8, 1996 TONY KNOWLE$, GOVEFtNOFI 3001 PORCUPINE DRIVE ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 FAX: (907) 276-7542 Dan Stoltz BP Exploration (Alaska), Inc. P O Box 196612 Anchorage, AK 99519-6612 Prudhoe Bay Unit S-41L1 BP Exploration (Alaska), Inc. Pemfit No 96-025 Surf Loc 4152'NSL, 4504'WEL, Sec. 35, T12N, R12E, UM Btmhole Loc 947'SNL, 2571'EWL, Sec. 25, T12N, R12E, UM Dear Mr. Stoltz: Enclosed is the approved application for pemfit to drill the above referenced well. The permit to drill does not exempt you from obtaining additional permits required by law from other govemmental agencies, and does not authorize conducting drilling operations until all other required pernfitting determinations are made. The permit is for a new wellbore segment of existing well S-41, Permit No. 96-24, API 029-22645-00. Production should continue to be reported as a function of the original AP1 number stated above. BlowOut prevention equipment (BOPE) must be tested in accordance with 20 A_AC 25.035. Sufficient notice (approximately 24 hours) of the BOPE test performed before drilling below the surface casing shoe must be given so that a representative of the Commission may witness the test. Notice may be given by contacting the Commission petroleum field inspector on the North Slope pager at 659-3607. Chairman ~ BY ORDER OF TitF, COMMISSION /end c: Dept of Fish & Game, Habitat Section - w/o encl Dept of Environmental Conservation - w/o end Joan Miller - AOGCC STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION PERMIT TO DRILL 2O AAC 25.005 la. Type of work Drill [] Redrill FIIlb. Type of well. Exploratoryl-I Stratigraphic Test [] Development Oil [] Re-Entry [] DeepenI-1t Service [] Development Gas [] Single Zone [] Multiple Zone [] 2. Name of Operator 5. Datum Elevation (DF or KB) 10. Field and Pool BP Exploration Plan RTE= 70.8 feet Prudhoe Bay Field/Prudhoe 3. Address 6. Property Designation Bay Pool P. O. Box 196612, Anchoraqe, Alaska 99519-6612 ~ADL 028257 4. Location of well at surface 7. Unit or property Name 11. Type Bond(see 20 AAC 25.025) : 4152' NSL, 4504' WEL, SEC. 35, T12N, R12E Prudhoe Bay Unit At top of productive interval 8. Well number Number 2081' SNL, 609' EWL, SEC. 25, T12N, R 12E S-41L 1 ~,¢S 100302630-277 At total depth 9. Approximate spud date Amount 947' SNL, 2571' EWL, SEC. 25, T12N, R 12E 02/07/96 $200,000. O0 12.propertyDistancelinetO nearest 13. Distance to nearest well 14. Number of acres in property 15./~7,,tPr("p~ed~ £?r~dept~.l'~D and TVD) ADL 047448 947 feet No Close Approach feet 2560 ¢¢7,¢8' MD /,~56' TVD feet 16. To be completed for deviated wells 17. Anticipated pressure (see 20 AAC 25.035 (e)(2)) Kickoff depth lOOO feet Maximum hole angle 9o o Maximum surface 3330 psig At total depth (TVD) 8800'/4390 psig 18. Casing program Setting Depth s~ze Specifications Top Bottom Quantity of cement Hole Casing Weight Grade Coupling Length MD TVD MD TVD (include stage data) 30" 20" 91.5# H-40 Weld 80' 30' 30' 110' 110' 260 sx A rcticset (Approx.) 12-1/4" 9-5/8" 47# L-80 BTC 3200' 29' 29' 3200' 3000' 1044 sx Class 'E', 272 sx Class 'C' 8'1/2" 7" 29# L-80 BTC-Mod 12309' 28' 28' 12309' 8892' 646 Class 'G' 6" 4-1/2" 12. 6# L-80 BTC-Mod 1962' 11785' 8842' 13747' 8862' Uncemented Slotted Liner 19. To be completed for Redrill, Re-entry, and Deepen Operations. Present well condition summary Total depth: measured feet Plugs (measured) true vertical feet Effective depth: measured feet Junk (measured) true vertical feet Casing Length Size Cemented Measured depth True Vertical depth Structural Conductor - ;..~. ,...,. ~: . Surface Intermediate Production JAN 25 Liner Perforation depth: measured ,~.~.~.,...u ...... Av~f,F. ,-.. ?, :~, true vertical -~'~ ...... 20. Attachments Filing fee [] Property plat [] BOP Sketch [] Diverter Sketch [] Drilling program[] Drilling fluid program [] Time vs depth plot [] Refraction analysis [] Seabed reporti-I 20 AAC 25.050 requirements[] 21.1 hereby ce, Cfr~ that th~ fo/ag/Cog is true and correct to the best of my knowledge Signed,,~_~4.~?:; ~_~i~j~_...~.," Title Senior Drilling Engineer Date / / /., ..... ~ Commission Use Only ~ermit,.~,Number APl number Approval.date See cover letter . ~0- 0,.~'~"' 50-0'2. c1-'-,,~(~--(~Oc~/~/~Lf for other requirements Conditions of approval Samples required [] Yes I~No Mud Icg required []Yes ~No Hydrogen sulfide measures J;~r'Yes [] No Directional survey required ,J~ Yes [] No Required working pressure for BOl:l~ri.q~l[l~iall~lVl:iv,, ,------,, J~5M; []10M; I-I15M; Other: -r)avid W, Johnston by order of _Approved by Commissioner ,ne comm.ssion Date¢~/~/~ '/ Submit in plicate I Well Name: I S 41 / S-41 L1 I Well Plan Summary Type of Well (producer or injector): I Producer Surface Location: 4,152' FSL 4,504' FEL Sec 35 T12N R12E Pilot Hole Bottom Hole Location: 1,480' FNL 1,313' FWL Sec. 25 T12N R12E Start of Horizontal Location: End of Horizontal Location: 947' FNL 2,571' FWL Sec 25 T12N R12E Sadlerochit Zone 4 (lower) Lateral 1,675' FNL 120' FWL Sec 25 T12N R12E Start of Horizontal Location: End of Horizontal Location: 947' FNL 2,571' FWL Sec 25 T12N R12E Sa~l River (upper) Lateral 2,081' FNL 609' FWL Sec 25 T12N R12E I AFE Number: I 4P0753 I Estimated Start Date: I Feb. 7, 1996 I I Ri~l: I Nabors 28-E I Operatin~l days to complete: I 32 IMD: 113,768' I ITvD: 19,056' I IRT-GL 33.8' I KBE: _+70.8' Well Design (conventional, slimhole, etc.) Formation Markers: HAW, multi-lateral I I Formation Tops MD TVD (SS) SV3 2870' 2710' 9-5/8" casing set below SV3 Ugnu 3880' 3530' Possible hydrocarbon bearing Kuparuk 8480' 6670' Possible hydrocarbon bearing HRZ 8490' 6686' Kingak 9780' 7550' Sag River 11550' 8751' Shublik 11675' 8795' Top Sadlerochit 12300' 8887' 7" casing point (at or near horz, TSAD - 5') TD of Well 13768' 9056' 4-1/2" liner point AN o Casinq/Tubinq Proqram: Hole Size Csg/ Wt/Ft Grade Conn Length Top Btm Tbs O.D. MD/TVD MD/TVD 30" 20" 91.5# H-40 Weld 80' 30'/30' 110'/110' 12-1/4" 9-5/8" 47.0# L-80 BTC 3200' 29'/29' 3200'/3000' 8-1/2" 7" 29.0# L-80 BTC-MOD 12309' 28?28' 12309'/8892' Lower Lateral 6" I 4-1/2" 12.6# L-80 BTC-MO D 1609' 12159'/8892' 13768'/9047' Upper Lateral (slotted) 6" I 4-1/2" 12.6# L-80 BTC-MO D 1962' 11785'/8842' 13747'/8862' I (slotted) Production Tubing I 4-1/2" 12.6# L-80 BTC-MOD 11959' 26'/26' 11985'/8855' Cementing Program: 'Lead ~ement Tail Cement Casin~Liner Sx / Wt / Yield Sx / Wt / Yield Comments Class E Lead; Class C Tail; 100% excess; 9-5/8" 1,044 / 11.5 / 1.92 272 / 15.7 / 1.15 Pump time=4+ hrs; TOC = Surface Premium Lead and Tail; Tail FW=0; 7" 357/11.0/3.24 289/15.7/1.14 30% excess; Pump time=4+ hrs; TOC = _+3,300' MD (_+500' above Ugnu) 4-1/2" None None Slotted liner (1 st Lateral) 4-1/2" None None Slotted liner (2nd Lateral) Volume assumptions: Gauge hole + designated excess; 80' shoe joints; TOC as designated. Logging I Co ls: 12-1/4" Hole 8-1/2" Hole 6" Hole I Cased Hole: Program: I MWD Directional I MWD Directional; DLL/GR/Sonic (pilot hole only) I MWD GR/Directional/Resistivity (RLL optional in upper lateral) I None planned Mud Program: Surface Mud Pro~perties: I 12-1/4" hole section: SPUD Density Marsh Yield 10 sec 10 min pH Fluid (PPG) Viscosity Point gel ~lel Loss Ini. tial 8.6 _+ 300 35-50 25-45 50-80 9-10 15-20 Final 9.4-9.8 180-220 20-40 15-30 30-50 9-10 15-20 Hazards/Concerns Bridging, large heavy gravels, wet clays. Frequent sweeps to aid hole cleaning. Intermediate Mud Properties: I 8-1/2" hole section (pilot hole and turn to horizontali: LSND Density Yield. 10 sec 10 min pH Fluid (PPG) PV Point ~lel ~lel Loss Initial 8.6-8.8 6-10 6-8 3-6 8-10 9.0-9.5 8-12 Cretaceous 9.8+ 10-12 8-12 4-8 8-12 9.0-9.5 <8 Final 10-10.2 16-20 8-12 LSYP 12-16 16-20 9.0-9.5 HTHP-13.0 Hazards/Concerns Cretaceous overpressure expected, MW to be at least 9.8 ppg. Utilize hi vis sweeps to assist hole cleaning Monitor LSYP and increase if problems occur trying to clean the hole. Potential high torque could need lubricant use. Reduce APl fluid loss to <8 cc before drilling Kingak Section. Differential sticking due to higher MW. Potential for virgin pressure in the Sadlerochit (as high as 9.9 ppg EMW). Mud Proqram (continued):I Production Mud'~Propertie~: ' I 6" hole section: FIo-Pro Polymer Depth Density Marsh Yield 10 sec 10 min pH Fluid (PPG) Viscosity Point gel gel Loss Initial 9.5-10.0 50-60 30-40 15-20 18-24 9.5-10.5 <6 Final 9.5-10.0 50-60 30-40 15-20 18-24 9.5-10.5 <6 Hazards/Concerns Potential for virgin pressure (as high as 9.9 ppg EMW) Lost Circulation due to overbalance in Sadlerochit. Differential sticking with overbalance situation. Perform report daily checks on KCI concentrations in Xanvis KCI system. Anticipated high torque to be combated with 2% Lubetex pre-mixed. Directional: I KOP: I ~000' Maximum Hole Angle: Tangent Angle Close Approach Well: 90 46.5° None Well Control: Well control equipment consisting of 5,000 psi W.P. pipe rams, blind rams, and annular preventer will be installed and is capable of handling maximum potential surface pressures. Diverter, BOPE and drilling fluid system schematics on file with AOGCC. Disposal Cuffings Handling- Fluid Handling- Annular Injection- CC2A Annular injection. Approval is hereby requested for annular injection into the S-41 well with the S-24 well as a contingency (back-up). The S-41 well is a new well and has not been previously approved for annular injection. The S-24 well was approved for annular injection by AOGCC on Nov. 30, 1995 for the S-05A well (recently completed). Cumulative total limitations will remain in effect. PREV. VOLUME MAX. PERMITTED MAX. PERMITTED PERMITTED AREA WELL INJECTED VOLUME FLUID DENSITY DATES (aBES) (aBES) (PPG) WOA S-41 0 35,000 17.0 Pending Approval S-24 7,701 35,000 17.0 11/30/95-11/30/96 . . o . . Aquifers in the Prudhoe Bay Field Western Operating Area have been exempted from Class II injection activities by the AOGCC by Aquifer Exemption Order #1 as referenced in Area Injection Order #3. There are no domestic or industrial use water wells located within one mile of the project area. The following design criteria were utilized in determination of maximum annular injection pressures (the attached pressure nomograph provides injection pressure vs. fluid density data): S-41 (Proposed new well) 9-5/8", 47#, L-80 set and cemented at _+3,200' MD (3,000' TVD) Burst (80%) = 5,496 psi 7", 29#, L-80 set and cemented at _+12,309' MD (8,967' TVD) Collapse (80%) - 5,616 psi S-24 (contingency or back-up) 13-5/8", 68#, L-80 set and cemented at 2,668' MD (2,668' TVD) Burst (80%) = 2,760 psi 9-5/8", 47#, L~80 set and cemented at 9,843' MD Collapse (80%) - 3,800 psi A determination has been made that the pumping operation will not endanger the integrity of the well being drilled by the submission of data to AOGCC on 10/30/95 which demonstrates the confining layers, porosity and permeability of the injection zone. The cement design for these wells (and the subject S-41 well) ensures that annular pumping into hydrocarbon zones will not occur. Worse case scenario calculations assume 17.0 ppg maximum fluid density and gas-filled inner casing (see attached nomograph for ppg equivalent mud weights vs. injection pressure profiles). Breakdown pressure of the Ugnu is 13.5 ppg equivalent mud weight. DO NOT EXCEED 35,000 BBLS IN ANY GIVEN ANNULUS. S-41 Operational Summary . . . . . 10. 11. 12. 13. 18. 19. 20. 21. 22. 23. 24. MIRU. NU diverter and function test same. Drill 12-1/4" hole to _+ 3,200' MD,/3,000' TVD. Run and cement 9-5/8", 47#, L-80 casing to surface. Install blowout prevention equipment consisting of 5,000 psi W.P. pipe rams, blind rams, and annular preventer. Function test BOPE to 5,000/250 psi. Test 9-5/8" casing to 3,000 psi for 30 minutes. A formation leak-off test will be performed 10' below the shoe. Directionally drill 8-1/2" pilot hole into the Sadlerochit (Zone 4) @ _+12,454' MD, 9,128' TVD. Run open logs consisting (as a minimum) of DLL/GR/Sonic. RFT's may be run pending hole conditions. Plug back pilot hole to · +11,500' MD or a depth which best promotes a final build and turn to the Sadlerochit lateral target. Directionally drill 8-1/2" hole to Sadlerochit Zone 4 @ _+12,309' MD, 8,967' TVD. Make a hole opener run to total depth. Run 7" 29#, L-80, casing string and cement with Class G cement to +500' above the Ugnu formation (prognosed at _+3,880 MD). RU and pump fresh water mud down 9-5/8" x 7" annulus to insure clear for annular injection. Test casing to 3,500 psi for 30 minutes. Drill a 6" hole in the Sadlerochit Zone 4 interval to 13,768' MD, 9,047' TVD. Planned inclination is 86.8° along an azimuth of 63°. POOH. Note: Inclination, azimuth and overall lateral length may be shortened by the onsite geologist. Make a hole opener run to total depth. POOH. Run 4-1/2" 12.6#, L-80 slotted liner from total depth to _+150' inside 7" casing shoe. Displace well from FIo-Pro mud to filtered seawater. Spot lithium hypochlorite breaker across slotted liner length. Set 7" x 4-1/2" permanent production packer (with 4-1/2" tubing tail) at _+11,765' MD (near the end of the 65° tangent). POOH. Set oriented, retrievable whipstock above permanent packer to promote casing exit at +11,750' MD (8,835' TVD; 5' TVD below the top of the Sag River). Mill window off whipstock at _+11,750' MD and drill _+29' new hole. POOH. PU directional BHA, kick-off and directionally drill a 6" hole in the Sag River to +13,747' MD (final inclination at · +89°; final azimuth at -+63°). POOH. Note: Inclination, azimuth and overall lateral length may be shortened by the onsite geologist. A wiper trip may be made prior to running production liner. Run and set a 4-1/2", L-80 slotted liner @ Total Depth. Top of liner will be at +11,760' MD (+10' below casing exit). RIH and pull retrievable whipstock. RU and run 4-1/2", L-80, production tubing. Set two way check and test to 1,000 psi. ND BOPE. NU tree and test to 5,000 psi. Freeze protect well and release rig. Drilling Hazards · Potential hydrocarbon-bearing zones expected above the Sag River include the Kuparuk, West Sak and Ugnu. Cement top is planned for 500' above the Ugnu. · Losses have been encountered drilling the Sag River, Shublik and Sadlerochit formations on other S-Pad wells. Be prepared for losses near any faults and formation interfaces between the Sag River, Shublik and Sadlerochit. · A minimum of 9.8 ppg mud weight will be used to drill the Cretaceous injection interval. Gas cut mud has been experienced on previous S-Pad wells in this interval. · Shale sloughing, overpressure, stuck pipe and hole cleaning problems have been reported on several S-Pad wells. Mud weight, shale inhibition products, good hole cleaning and tripping practices should help minimize these problems. · Pore pressure may be as high as 9.9 ppg EMW in the Sadlerochit interval. · Faulting is prognosed for both lateral intervals and possibly in the Kingak shale interval. Lost circulation materials should be readily available. Ann. Inj. Nomograph PPG vs PSI S-41 Well Hydrostatic Pressure 9-5/8" Casing Burst 7" Casing Collapse Maximum Allowable Fluid Density at 3,000' TVD at 80% at 80% Injection Pressure (ppg) (psi) (psi) (psi) (psi) 8.00 1248 5,496 5,616 4,248 9.00 1404 5,496 5,616 4,092 10.00 1560 5,496 5,616 3,936 11.00 1716 5,496 5,616 3,780 12.00 1872 5,496 5,616 3,624 13.00 2028 5,496 5,616 3,468 14.00 21 84 5,496 5,616 3,312 15.00 2340 5,496 5,616 3,1 56 16.00 2496 5,496 5,616 3,000 17.00 2652 5,496 5,616 2,844 S-24 Well Hydrostatic Pressure 13-3/8" Casing Burst 9-5/8" Casing Collapse Maximum Allowable Fluid Density at 2,668' TVD at 80% at 80% Injection Pressure (ppg) (psi) (psi) (psi) (psi) 8.00 1110 2,760 3,800 1,650 9.00 1249 2,760 3,800 1,511 10.00 1387 2,760 3,800 1,373 11.00 1526 2,760 3,800 1,234 12.00 1665 2,760 3,800 1,095 13.00 1804 2,760 3,800 956 14.00 1942 2,760 3,800 81 8 15.00 2081 2,760 3,800 679 16.00 2220 2,760 3,800 540 17.00 2359 2,760 3,800 401 Hydrostatic Pressure = TVD (casing shoe) * 0.052 * Fluid Density (ppg) Maximum Allowable Injection Pressure - Lesser of (Outer Csg Burst or Inner Csg Collapse) - Hydrostatic Pressure . ID: 3RN .2_5'96 17:47 No.O15 P.02 ----3: : "-- -- - -- ,,, , ,-~-.~--~ -- NOTES 1. DA'FI: OF SURVEY: JANLJARY 21, 1996. 2, REFERENCE FIELD 80OK: wOA96- 02 (pgs. ln.. 72). 3. ALASKA STATE PLANE COOI'q)INA1F5 ARE ZONE 4., ALASKA, NAD 4.. PAD SCALE FACTOR IS 0.999916b, 5. HORIZONTAL/VERTICAL CONTROl. BASED ON MONUMENTS S-3 AND 5' 4, 6, ELEVATIONS ARE 8P M.S.L. OATUM. LEGEND ~ AS-BUILT CONDUCTOR ~ EXISIlNG WELL -- ~1~ -- PLANT I ?¢ .... '_' '$ PAD ~/~-1 HIS . ..I/.%. ............ VICINITY MAP SURVFY 2!) ~MON S-1 S-PAD m' m " ~. 1 SURVEYOR'S CERTIFICATE I HEREB~ ~LR'III~ IHAI I AU PROPERLY R~G~$1LRED AND TO PF~ACTICC LAND 5UN~YIN(; IN THE STATE O[ ALASKA AND 3HAT Tills PLAT REPRESi. N'I~ A MADF HY MF Or UNDER MY DIRECT SUPER~SION AND TIIAT ALL DIMENSIONS AND OTIIER DETAIl g CORRECT AS OF JANUARY 21, 1996, '0.10A'IL I LOCAIED WI'II'lIN PROTRACTED SEC, ,.35, T, 12 N,, R, 12 E,, UMIAT MERIDIAN, ALASKA PLAN'I GEODE 1 lC; COORDINATES POSITION(DMS) ~ 70'21 '17.952" E, 500.03 149'02'03.045" N. 1,009.92 70'21'18,222" .E_; ..... .4. 70.5..}. 149'02'03.038" N. 1,009.91 70'21'18.520" E. 440.24 149'02'03.024" GFODFTIC POSITIO~(~.DD) 70,3549811' 149.0341792' 70,3550617' 149,0341772' GROUND ELLVA'IION 37,0' SECTION OFF SE'I ".; 4,504' FEI 4,181' FSL 4,503' I-I-I 37,1' 70.355144/1' /1,211' FSL 149.0341733' 37.2'. 4,503' FEi 115!,1[ D~AWN: ~JlOLL IM;KI.D; ~EILER ' , WOASI~.LL ........... NO. 1".- 400' BP EXPLORATION WOA S-PAl,) """'" AS. BUILT CONDUCTORS WE/.I.I.S S-41, S-42 &: S-q.3 / ~ ¢ I __ ID' 3~N 25'96 17:48 No.O15 P.03 WOA $ Pad Wells 41, 42 & 43 ADJACENT WELLHEAD LOCATIONS AS-BUILT CONDUCTOR WELL NORTHING EASTING S41 1,010.12 500.03 ADJACENT WELLHEAD DATA WgLt- NORTHING S42 S43 1,009,92 1,00g.@1 EASTING ! 470.53 440:24 DISTANCE Feet 29.50 59.79 DIRECTION To adjacent wells North North NOTES: 1, All coordinates shown are in plant system. 2, Reference F,B,; MPU 96-02 (18-22) 3, Date of survey; 1/21/95 4. Existing welll~ead data from record well as-builts. Input By ' Stoll Checked By: Seller 1/23/06 1/23/@6 Page 1 of 1 . .-.,..; . .. .. . - . - .. · · . . ..... .. . .- ;.: -: . -y, . -. :'-.:. :. -.: , . · . . ... . . . . .. . -. .. . ~PX-Sho.¢ed Sr"-'-'ces Dl'"illln9 Alo. sko. S~o..~e F,,.,ne: Zone4 PBU: -V,/OA: S-Pad 2-41 Est, Sur"F'ace loca'-tslon 78~ 4~0 ~ Checked By ~ '"~" /! I '~", ..? T~,~¢: I,~'~ rv~ ns f~' c-i~ x ~ v '~ I ~ ~ ~77 N ~ E ~4470 '~ ] ~T~9 ~7 ~ N 2~i C ~10 %%:/ 7OOO -- ~ ~. v ~ ~TIC~ ~C~ ~' ~,~ FI~IzI]~A/_ VIE1/(TRLE I~RTH) SCAL£ ~ I'~;. ! l)lVlSll~ 86~E t37~ HALLI~)URT[]N i/! 1/96 I~.B4 o~ N/S 5408.46 N E/V 7O~l,aS £ Il)ute Plotted , i/ll/~ I ]JPX-SP~ed Senvlces ]]Pi[ting Alaska StaCe Plane: Zone4 PBU: WDA: S-Pad [;-4:1 Es~, Sub,ace location S-4 t LP~p7 P~'e[i~nar, y ~etlp[an 0811CAt I~ I-[RI2[]~TPi_ VIEW SCA.E 5130 fi. ! ,~dE Y i~CF, HALLll)LIRTDI~ I/'~1/06 11,3~ o~ 89~7 e 19747 ~ ET~9 WELL PERMIT CHECKLIST PROGRAM] exp [] dev [] .~serv [] ~ ADMINISTRATION ENGINEERING 1. Permit fee attached .................. ~ N 2. Lease number appropriate ............... .~ N 3. Unique well name and number .............. '~,) N 4. Well located in a defined pool ............. ~. N 5. Well located proper distance from drlg unit boundary. . ~ N 6. Well located proper distance from other wells ...... ~ N 7. Sufficient acreage available in drilling unit ...... ~ N 8. If deviated, is wellbore plat included ......... ~ N 9. Operator only affected party .............. ~ N 10. Operator has appropriate bond in force ......... ~ N 11. Permit can be issued without conservation order ..... ~Y~ N 12. Permit can be issued without administrative approval.. ~ N 13. Can permit be approved before 15-day wait ........ ~ N REMARKS APPR 14. Conductor string provided ................ Y NJ 15. Surface casing protects all known USDWs ......... Y 16. CMT vol adequate to circulate on conductor & surf csg.. Y 17. CMT vol adequate to tie-in long string to surf csg . . Y 18. CMT will cover all known productive horizons ....... 19. Casing designs adequate for C, T, B & permafrost .... ~ N 20. Adequate tankage or reserve pit ............. ~ N 21. If a re-drill, has a 10-403 for abndnmnt been approved. 22. Adequate wellbore separation proposed ......... ~) N 23. If diverter required, is it adequate .......... ~ 24. Drilling fluid program schematic & equip list adequate .C~'~ N 25. BOPEs adequate ..................... ~ N 26. BOPE press rating adequate; test to ~~ psig~ N 27. Choke manifold complies w/API RP-53 (May 84) ...... ~~f/~ 28. Work will occur without operation shutdown ....... .~ N 29. Is presence of H2S gas probable ............ ~ N GEOLOGY / 30. Permit can be issued w/o hydrogen sulfide measures .... Y N/ 31. Data presented on potential overpressure zones ..... Y ~ 32. Seismic analysis of shallow gas zones .......... Y/ N 33. Seabed condition survey (if off-shore) ......... / N 34. Contact name/phone for weekly progress reports .... /Y N [exploratory only] ~ ENGINEERING: COMMISSION: HOWfljb - A:~FORMS~cheklist rev 11/95 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. ~ Subfile 2 is type: LIS TAPE HEADER PRUDHOE BAY UNIT M /MAD nOGS WELL NAME: API NUMBER: OPERATOR: LOGGING COMPANY: TAPE CREATION DATE: JOB DATA JOB NUMBER: LOGGING ENGINEER: OPERATOR WITNESS: MWD RUN 5 AK-MW- 60027 R. JACKSON C. DIXON :]., .;, I 500292264560 BP EXPLO~TION (~S~) INC. SPERRY-S~ DRILLING SERVICES 22-J~-96 MWD RUN 6 MWD RUN 7 E. CRIBBS C. DIXON E. CRIBBS C. DIXON JOB NUMBER: LOGGING ENGINEER: OPERATOR WITNESS: MWD RUN 8 E. CRIBBS C. DIXON MWD RUN 12 R. JACKSON K. WHITE MWD RUN 13 R. JACKSON K. WHITE MWD RUN 14 JOB NUMBER: LOGGING ENGINEER: OPERATOR WITNESS: SURFACE LOCATION SECTION: TOWNSHIP: RANGE: FNL: FSL: FEL: FWL: ELEVATION(FT FROM MSL 0) KELLY BUSHING: DERRICK FLOOR: GROUND LEVEL: WELL CASING RECORD R. JACKSON K. WHITE MWD RUN 15 E. CRIBBS K. WHITE 35 12N 12E 4152 4504 71.20 69.70 37.00 MWD RUN 16 E. CRIBBS K. WHITE OPEN HOLE CASING DRILLERS BIT SIZE (IN) SIZE (IN) DEPTH (FT) 1ST STRING 30.000 20.000 110.0 2ND STRING 12.250 9.625 3331.0 3RD STRING 8.500 7.000 11892.0 PRODUCTION STRING 6.000 14085.0 REMARKS: MWD - GR/EWR4. ALL DEPTHS ARE MEASURED BIT DEPTHS. THIS WELL, S-41L1, IS REPRESENTED BY RUNS 1, 2, 4 THROUGH 8, AND 12 THROUGH 16. MWD RUNS 1 & 2 WERE DIRECTIONAL ONLY & NO DATA IS PRESENTED. MWD RUN 4 WAS DIRECTIONAL WITH GAMMA RAY (SGRD). DUE TO DRILLING PROBLEMS, NO DATA IS AVAILABLE. MWD RUNS 5 THROUGH 8, AND 12 THROUGH 16 WERE DIRECT~ 'AL WITH GAMMA RAY (SGRD) . ALL GA]V~A ~Y DATA WAS ACQUIRED WITH NATURAL GAMMA PROBE SCINTILLATION TYPE DETECTORS (NGP/SGRD) . THIS WELL WAS KICKED OFF FROM S-41, THROUGH A WINDOW CUT IN THE 7" CASING AT 11892' THE WELL WAS DRILLED TO TD AT 14085'. NO DEPTH SHIFTS WERE APPLIED. r~mADER ' ~E NUMBER: 1 EDITED MERGED MWD Depth shifted and clipped curves; all bit runs merged. DEPTH INCREMENT: .5000 FILE SUMMARY PBU TOOL CODE START DEPTH GR 9382.0 $ BASELINE CURVE FOR SHIFTS: CURVE SHIFT DATA (MEASURED DEPTH) BASELINE DEPTH $ MERGED DATA SOURCE PBU TOOL CODE MWD 5 MWD 6 MWD 7 MWD 8 MWD 12 MWD 13 MWD 14 MWD 15 MWD 16 $ REMARKS: STOP DEPTH 14024.0 EQUIVALENT UNSHIFTED DEPTH BIT RUN NO MERGE TOP MERGE BASE 9408.0 9715.0 9715.0 9960.0 9960.0 11169.0 11169.0 11892.0 11892.0 11921.0 11921.0 12017.0 12017.0 12688.0 12688.0 13424.0 13424.0 14085.0 MERGED MAIN PASS. NO GAMMA RAY DATA WAS USED FROM RUN 12. DATA WAS USED FROM 12. ONLY THE ROP CN WN FN COUN STAT : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE~ 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units GR MWD 68 1 AAPI ROP MWD 68 1 FPHR API API API API Log Crv Crv Size Length Typ Typ Cls Mod 4 4 90 310 01 1 4 4 90 995 99 1 ~ATA RECORD '(TzrE# 0) 1014 BYTES * Total Data Records: 112 Tape File Start Depth = 14085.000000 Tape File End Depth = 9382.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** · LIS representation code decoding summary: Rep Code: 68 28222 datums Tape Subfile: 2 219 records... Minimum record length: 62 bytes Maximum record length: 1014 bytes i~mfile 3 is type: ,,I'S FILE HEADER FILE NUMBER: 2 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NO: 5 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH GR 9382.0 $ LOG HEADER DATA DATE LOGGED: SOFTWARE SURFACE SOFTWARE VERSION: DOWNHOLE SOFTWARE VERSION: .DATA TYPE (MEMORY OR REAL-TIME): TD DRILLER (FT) : TOP LOG INTERVAL (FT) : BOTTOM LOG INTERVAL (FT) : BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG) MINIMUM ANGLE: MAXIMIIMANGLE: STOP DEPTH 9665.0 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE NGP NATURAL GAMMA PROBE $ BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN): DRILLER'S CASING DEPTH (FT) : BOREHOLE CONDITIONS MUD TYPE: MUD DENSITY (LB/G): MUD VISCOSITY (S) : MUD PH: MUD CHLORIDES (PPM) : FLUID LOSS (C3) : RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT): MUD AT MAX CIRCULATING TEMPERATURE: MUD FILTRATE AT MT: MUD CAKE AT MT: NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN): TOOL STANDOFF (IN) : EWR FREQUENCY (HZ) : REMARKS: MWD RUN 5. 10-MAR- 96 MSC VER 1.32 / ISC VER 2.11 NGP VER 5.82 / SP4 VER 5.01 MEMORY 9715.0 9408.0 9715.0 0 47.2 48.7 TOOL NUMBER NGP 66 8.500 3331.0 LSND 10.20 44.0 10.4 600 7.6 .000 .000 .000 .000 .0 124.9 .0 .0 .00 .000 .0 0 s~Aq ~TOT s~Aq ~9 :q~Bu~I pzoo~z mnm~xeM · ''sp~oos~ ~t smn~p 89 :~poo dsE :A~mmns Buipomsp ~pom uoy~usss~ds~ O0000S'O = BulD~ds I~A~ ~II~ 000000'~8£6 = q~d~G pu~ ~I7~ 000000'0E£6 = q~d~ ~P~S ~IY~ 66 S66 06 5 I0 0I£ 06 5 6 :spxoo~H ~G I~O~ P ~Hd~ I 89 GMI~ 6OH g po~ sIO cIXi dXi q~Busq szls s~IuO ssIdmPS ~poo IOOi ~m~M :s~A~nD g (P9 #HdXi) GHOD~H £tfAP{O~ ~ IfXS~ : ZdO~IS HI%tON : Xlf~ ZOHGi1Hd : IqIP-S : (kOtStf%lf) MOIJ.lfHOqdXZ d~t : NiIOD NM ND 0 0' : (ZH) ADMMfl~MH,~ : (MI) ,~.~O(~N~f. LS ~IOO3, 000 ' 00' : (MI) MOILDZMMOD MqOH . O' E'££I O' 000 ' 000 ' 000 ' 000 ' 8'S 009 P'II 0'85 00'0I ~MS~I 0'I£££ 00S'8 99 dgN ~Z~qN ~OOL L'PP 0 0'I966 0'9IL6 0'I966 I0'fi ~ZA PdS / ~8'fi ~ZA dON II'E ~ZA OgI / ~£'1 ~ZA DSM 96-M~I4- II : (i.~) H£dZ~ ©MIS~fO S ,%tZ~IqI%t(I :(MI) ZZIS iI~ Z~IOH NZdO ~fi~fG ©NIS~fD GN-~f Z~IOHZ%IOE ZdA,L ~IOO,l, Z~OD ~IOO,L MOGAIZA (MOiiO~ Oi dOi) DNI%{LS qOO,L 0'9886 HL~Z~ dOiS · saI7~ s~m~edss u! un~ 2~q qo~ ~o~ ~jep ~peaq 6oI pue Si~ :aclX~ sT p SIT~qn~ ss~Xq ~IOI :q~Bu~I p~om~ mnmyx~N ss~Xq E9 :q~BusI p~om~ mnmIuy~ · '-sp~oD~l EL ~ :~Iy~qns sd~i smn~p 9E£0£ 89 :spoD dsE :X~mmmns Buypoosp spoo uoy~m~u~ss~ds~ $I% 00000~'0 = Bu~DPdS I~A~ ~I~ ~dPl 000000'~E96 = q~d~ pu~ ~I!f ~d~l 000000'~L66 = q~d~ ~P2S sI!~ 8d~i 66 S66 06 ~ I0 0I£ 06 ~ 6 :sp~oo~ m~mG Im~OL P EHd~ I 89 G~ dOE E P Id~f I 89 G~ H~ I pOM SIO dXi cL{£ q~Bua~ az!s Id~ IdW I6~ s~Tuh s~Idmms ~poo IOOi smeM :S~A~nD E ~ :~I q2dsp sdmi ZdOqS HLHON : IqIP-S : Ni1OD NM 0 O' : (ZH) ADN.Wfl0Z~,~ : (NI) .~,~OGN-If. LS 000 ' 00' : (NI) NOIIDHHEOD Z~OH :XIEI~fN o O' O' O' 000 ' 000 ' 000 ' 000 ' 0O9 S'0I 0'6~ 00'0I 0'Z£££ 009'8 99 dON 6'9E 0 0'69III 0'I966 0'69III A~ON~H I0'S EHA PdS / ES'S ESA dOM II'E ~ZA DSI / E£'I ~ZA OSN 96-HtfN- £I : (IzI) H.I,d,WG DNISIfD S .%LW~I~I%{~ : (MI) .qZIS ,LIN ,W~IOH N.WdO tf,Ltf~ DNIStfD ~Ntf ,~IOH,~tO~ (NO,I,,T, OI5 O,l, dOi) DNI%IAS ~IOOi 0'E60II CN WN FN COUN ST~T : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 AAPI 4 2 ROP MWD 68 1 FPHR 4 API API API API Log Crv Crv Size Length Typ Typ Cls Mod 4 90 310 01 1 4 90 995 99 1 * DATA RECORD (TYPE# 0) 1014 BYTES * Total Data Records: 32 Tape File Start Depth = 11200.000000 Tape File End Depth = 9875.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 9986 datums Tape Subfile: 5 95 records... Minimum record length: 62 bytes Maximum record length: 1014 bytes i.,Dfile 6 is type: ,,iS FILE HEADER FILE NUMBER: 5 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NO: 8 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH GR 11057.0 $ LOG HEADER DATA DATE LOGGED: SOFTWARE SURFACE SOFTWARE VERSION: DOWNHOLE SOFTWARE VERSION: DATA TYPE (MEMORY OR REAL-TIME): TD DRILLER (FT) : TOP LOG INTERVAL (FT) : BOTTOM LOG INTERVAL (FT) : BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG) MINIMUM ANGLE: MAXIMUM ANGLE: STC'P DEPTH 11985.0 15-MAR-96 MSC VER 1.32 / ISC VER 2.11 NGP VER 5.82 / SP4 VER 5.01 MEMORY 12046.0 11169.0 12046.0 0 44.2 65.9 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE NGP NATURAL GAMMA PROBE $ TOOL NUMBER NGP 235 BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN): DRILLER' S CASING DEPTH (FT) : 8.500 3331.0 BOREHOLE CONDITIONS MUD TYPE: MUD DENSITY (LB/G): MUD VISCOSITY (S) : MUD PH: MUD CHLORIDES (PPM): FLUID LOSS (C3) : RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT): MUD AT MAX CIRCULATING TEMPERATURE: MUD FILTRATE AT MT: MUD CAKE AT MT: LSND 10.40 50.0 10.2 500 4.3 .000 .000 .000 .000 .0 150.1 .0 .0 NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN): .00 .000 TOOL STANDOFF (IN) : EWR FREQUENCY (HZ) : .0 0 REMARKS: MWD RUN 8. CN WN FN COUN STAT DATA BELl THE KICK-OFF-POINT OF 118 WELL 'S-e±. $ : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA IS FROM THE * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 AAPI 2 ROP MWD 68 1 FPHR API API API API Log Crv Crv Size Length Typ Typ Cls Mod 4 90 310 01 1 4 90 995 99 1 * DATA RECORD (TYPE# 0) 1014 BYTES * Total Data Records: 27 Tape File Start Depth = 12100.000000 Tape File End Depth = 11000.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 36930 datums Tape Subfile: 6 92 records... Minimum record length: 62 bytes Maximum record length: 1014 bytes 'Z%R~f~IIVA~ SI ~L~Q Ak~H ~D ON 0 0' 000 ' 00' 0 ' 000 ' 0 ' 000 ' 0 ' 8£I 000' 0 ' 000 ' 000I~ 0'6 0'0£ 06'8 0'~68II 000'9 HZ~ItCflN ~OOL Z'99 0 0'IE6II 0'E68II 0'IE6II II'Z H~A DSI / ~£'I HZA DSN 96-~-PE 'Ni1H OMIq~II~ ~f S%fM SIHJ, 'HI N/lq GM~ : (ZH) AON,~flO.qE,~ : (MI) .~OQknf.l,S ~IOOJ, : (gI) NOIZDZHHOD ~qOH :XLISNZG XIHi~q4 qO0~ NOE~fl~N : (MI) HZIS .LI~ HqOH ZdX.l, ~IOOJ. ZGOD ~IO0,L HOQblZA (MOLLO~ OJ, ~Oi) DNI~LS ~IO0.T, HLdZ~ dO£S SI~ :sclAq s! t sIT~qn~ ONLY TH ~OP CURVE IS PRESENTED. CN WN FN COUN STAT : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 1 Curves: Name Tool Code Samples Units API API API API Log Crv Crv Size Length Typ Typ Cls Mod 1 ROP MWD 68 1 FPHR 4 4 90 995 99 1 * DATA RECORD (TYPE# 0) 1022 BYTES * Total Data Records: Tape File Start Depth = 11935.000000 Tape File End Depth = 11800.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 10529 datums Tape Subfile: 7 67 records... Minimum record length: 62 bytes Maximum record length: 1022 bytes subfile 8 is type: ,,~S FILE HEADER F I LE NI/MBER: 7 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NO: 13 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH GR 11877.0 $ LOG HEADER DATA DATE LOGGED: SOFTWARE SURFACE SOFTWARE VERSION: DOWNHOLE SOFTWARE VERSION: DATA TYPE (MEMORY OR REAL-TIME): TD DRILLER (FT) : TOP LOG INTERVAL (FT) : BOTTOM LOG INTERVAL (FT) : BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG) MINIMUM ANGLE: MAXIMUM ANGLE: STOP DEPTH 11973.0 25-MAR-96 MSC VER 1.32 / ISC VER 2.11 NGP VER 5.82 / SP4 VER 5.01 MEMORY 12017.0 11921.0 12017.0 0 66.2 85.3 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE NGP NATURAL GAMMA PROBE $ TOOL NUMBER NGP 272 BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN): DRILLER'S CASING DEPTH (FT) : 6.000 11892.0 BOREHOLE CONDITIONS MUD TYPE: MUD DENSITY (LB/G): MUD VISCOSITY (S) : MUD PH: MUD CHLORIDES (PPM) : FLUID LOSS (C3) : RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT): MUD AT MAX CIRCULATING TEMPERATURE: MUD FILTRATE AT MT: MUD CAKE AT MT: FLO - PRO 9.00 63.0 9.3 41000 5.2 .000 .000 .000 .000 .0 133.2 .0 .0 NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN): .00 .000 TOOL STANDOFF (IN) : EWR FREQUENCY (HZ): .0 0 REMARKS: MWD RUN 13. CN WN FN COUN STAT : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units API API API API Log Crv Crv Size Length Typ Typ Cls Mod 1 GR MWD 68 1 AAPI 4 2 ROP MWD 68 1 FPHR 4 4 90 310 01 1 4 90 995 99 1 * DATA RECORD (TYPE# 0) 1014 BYTES * Total Data Records: Tape File Start Depth = 12025.000000 Tape File End Depth = 11850.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 37984 datums Tape Subfile: 8 68 records... Minimum record length: Maximum record length: 62 bytes 1014 bytes 0 0' : (NI) .~O~N-tf, T,S ~IOO,T, 000 ' 00' :(MI) NOIIDZH~OD ZqOH :XIISNZ~ XI~i~ :XI~£~4 ~OOi NO~A~ZN . O' 0'££I O' 000 ' 000 ' 000 ' 000 ' 0008£ 0'6 0'99 00'6 O~d - O~I,~ 0'E68II 000'9 ZLE f'I6 0 0'889EI 0'LIOZI 0'889ZI I0'S H~A 5dS / E8'S ~ZA dDN II'E ~L& DSI / E£'I ~ZA DS~ 96-~-9E: : (~LeI) H,T, dHG ©NIS~fD S ,%~H~I~IIEG : (NI) HZIS ,LI~ H~IOH ~IHdO ~f.T,%f~ ©NI S%fD (ZN-~ ',~IOH,~%tO~t Z~X,I. ~IOOJ. ZGOD ~IOOJ, %tO~blZA (NOLLO~ O.L dOi) ©NI%~LS ~IOOJ. 0 'LE9EI 'SSIT~ sq~x~das u! unx qlq qo~ xo~ ~q~p ~sp~sq 5oi pu~ ~ZG~fZH SI~ :acLqq s! 6 ~IT~qns - CN WN FN COUN STAT : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 AAPI 4 2 ROP MWD 68 1 FPHR 4 API API API API Log Crv Crv Size Length Typ Typ Cls Mod 4 90 310 01 1 4 90 995 99 1 * DATA RECORD (TYPE# 0) 1014 BYTES * Total Data Records: 20 Tape File Start Depth = 12700.000000 Tape File End Depth = 11900.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 15333 datums Tape Subfile: 9 83 records... Minimum record length: 62 bytes Maximum record length: 1014 bytes ~= Subfile 10 is type: LIS FILE HEADER FILE NUMBER: 9 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NO: 15 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH GR 12627.0 $ LOG HEADER DATA DATE LOGGED: SOFTWARE SURFACE SOFTWARE VERSION: DOWNHOLE SOFTWARE VERSION: DATA TYPE (MEMORY OR REAL-TIME): TD DRILLER (FT) : TOP LOG INTERVAL (FT) : BOTTOM LOG INTERVAL (FT) : BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG) MINIMIIMANGLE: MAXIMUMANGLE: STOP DEPTH 13363.0 28-MAR-96 MSC VER 1.32 / ISC VER 2.11 NGP VER 5.82 / SP4 VER 5.01 MEMORY 13424.0 12688.0 13424.0 0 86.3 90.6 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE NGP NATURAL GAMMA PROBE $ TOOL NUMBER NGP 272 BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN): DRILLER'S CASING DEPTH (FT) : 6.000 11892.0 BOREHOLE CONDITIONS MUD TYPE: MUD DENSITY (LB/G): MUD VISCOSITY (S) : MUD PH: MUD CHLORIDES (PPM) : FLUID LOSS (C3) : RESISTIVITY (OHM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT): MUD AT MAX CIRCULATING TEMPERATURE: MUD FILTRATE AT MT: MUD CAKE AT MT: FLO-PRO 9.00 68.0 9.0 38000 5.0 .000 .000 .000 .000 .0 154.4 .0 .0 NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN): .00 .000 TOOL STANDOFF (IN) : EWR FREQUENCY (MZ) : .0 0 REMARKS: MWD RUN 15. CN WN FN COLIN ST~T : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 AAPI 4 2 ROP MWD 68 1 FPHR 4 * DATA RECORD (TYPE# 0) 1014 BYTES * Total Data Records: 21 API API API API Log Crv Crv Size Length Typ Typ Cls Mod 4 90 310 01 1 4 90 995 99 1 Tape File Start Depth = 13450.000000 Tape File End Depth = 12600.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 43088 datums Tape Subfile: 10 84 records... Minimum record length: 62 bytes Maximum record length: 1014 bytes ~e Subfile 11 is t~pe: LIS FILE HEADER FILE NLTMBER: 10 RAW MWD Curves and log header data for each bit run in separate files. BIT RUN NO: 16 DEPTH INCREMENT: .5000 FILE SUMMARY VENDOR TOOL CODE START DEPTH GR 13363.0 $ LOG HEADER DATA DATE LOGGED: SOFTWARE SURFACE SOFTWARE VERSION: DOWNHOLE SOFTWARE VERSION: DATA TYPE (MEMORY OR REAL-TIME): TD DRILLER (FT) : TOP LOG INTERVAL (FT) : BOTTOM LOG INTERVAL (FT) : BIT ROTATING SPEED (RPM) : HOLE INCLINATION (DEG) MINIMUM ANGLE: MAXIMUM ANGLE: STOP DEPTH 14024.0 TOOL STRING (TOP TO BOTTOM) VENDOR TOOL CODE TOOL TYPE NGP NATURAL GAMMA PROBE $ BOREHOLE AND CASING DATA OPEN HOLE BIT SIZE (IN): DRILLER' S CASING DEPTH (FT) : BOREHOLE CONDITIONS MUD TYPE: MUD DENSITY (LB/G): MUD VISCOSITY (S) : MUD PH: MUD CHLORIDES (PPM) : FLUID LOSS (C3) : RESISTIVITY (OHMM) AT TEMPERATURE (DEGF) MUD AT MEASURED TEMPERATURE (MT): MI/D AT MAX CIRCULATING TEMPERATURE: MUD FILTRATE AT MT: MI/D CAKE AT MT: NEUTRON TOOL MATRIX: MATRIX DENSITY: HOLE CORRECTION (IN): TOOL STANDOFF (IN): EWR FREQUENCY (HZ): REMARKS: MWD RUN 16. 29-MAR-96 MSC VER 1.32 / ISC VER 2.11 NGP VER 5.82 / SP4 VER 5.01 MEMORY 14085.0 13424.0 14085.0 0 87.6 93.8 TOOL NUMBER NGP 243 6.0O0 11892.0 FLO-PRO 9.00 64.0 8.6 36000 4.8 .000 .000 .000 .000 .0 162.7 .0 .0 .00 .000 .0 0 CN WN FN COUN STAT : BP EXPLORATION (ALASKA) : S-41L1 : PRUDHOE BAY : NORTH SLOPE : ALASKA * FORMAT RECORD (TYPE# 64) ONE DEPTH PER FRAME Tape depth ID: F 2 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 AAPI 4 2 ROP MWD 68 1 FPHR 4 API API API API Log Crv Crv Size Length Typ Typ Cls Mod 4 90 310 01 1 4 90 995 99 1 * DATA RECORD (TYPE# 0) 1014 BYTES * Total Data Records: 18 Tape File Start Depth = 14085.000000 Tape File End Depth = 13350.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = Feet **** FILE TRAILER **** LIS representation code decoding summary: Rep Code: 68 19747 datums Tape Subfile: 11 81 records... Minimum record length: 62 bytes Maximum record length: 1014 bytes ~ Subfile 12 is t~rpe. LIS 97/ 1/22 01 **** REEL TRAILER **** 97/ 1/22 01 Tape Subfile: 12 2 records... Minimum record length: 132 bytes Maximum record length: 132 bytes End of execution: Wed 22 JAN 97 5:30p Elapsed execution time = 2.63 seconds. SYSTEM RETURN CODE = 0
