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212-001
Post Office Box 244027 Anchorage, AK 99524-4027 3800 Centerpoint Drive Suite 1400 Anchorage, AK 99503 Phone: (907) 564-4891 06/01/2023 Mr. Mel Rixse Alaska Oil and Gas Conservation Commission 333 West 7th Avenue, Suite 100 Anchorage, Alaska 99501 Re: Prudhoe Bay Surface Casing by Conductor Annulus Top-offs of Cement, Corrosion Inhibitor through 6/1/2023. Dear Mr. Rixse, Enclosed please find a copy of a spreadsheet with a list of Prudhoe Bay wells that were topped-off with cement, corrosion inhibitor in the surface casing by conductor annulus through 6/1/2023. Cement top-offs are executed as needed to mitigate the void space left at surface by minor cement fallback during the primary surface casing by conductor cement job. The remaining void space between the top of the cement and the top of the conductor is filled with a heavier than water corrosion inhibitor to reduce the risk of external surface casing corrosion. The attached spreadsheets include the well names, API and PTD numbers, treatment dates and volumes. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of form 10-404 Report of Sundry Operations. If you have any additional questions, please contact me at 564-4891 or oliver.sternicki@hilcorp.com. Sincerely, Oliver Sternicki Well Integrity Supervisor Hilcorp North Slope, LLC Hilcorp North Slope LLC.Surface Casing by Conductor Annulus Cement, Corrosion Inhibitor Top-offReport of Sundry Operations (10-404)06/01/2023Well NamePTD #API #Initial top of cement (ft)Vol. of cement pumped (gal)Final top of cement (ft)Cement top off date Corrosion inhibitor (gal)Corrosion inhibitor/ sealant dateL-2072210815002923702003.371.31/23/2023123/1/2023L-2312230105002923746003.003.0-393/27/2023M-111810575002920589002.602.6-105/29/2023M-311920325002922256001.501.5-165/29/2023M-331941165002922504001.301.3-145/29/2023N-171830095002920898001.201.2-115/30/2023N-18A2081755002920906010.500.5-65/30/2023N-21A1961965002921342011.001.0-85/30/2023N-272071045002923365000.500.5-45/30/2023N-292141105002923521002.302.3-245/30/2023N-31215175500292356000-0--205/30/2023V-2342220045002923707006.3210.91/23/2023243/1/2023W-2412221545002923741002.502.5-263/1/2023Z-121891025002921977000.700.7-45/23/2023Z-34212061500292346900-0--155/27/2023Z-402111735002923462000.700.7-65/27/2023Z-46A2052035002923280010.500.5-35/23/2023Z-502120015002923463000.500.5-35/27/2023Z-662121955002923482000.700.7-85/27/2023Z-116211124500292345500-0--175/27/2023Z-210204181500292322600-0--125/27/2023Z-2292221045002923726003.8361.23/5/2023363/27/20230.500.5-5/27/2023Z-502120015002923463003 STATE OF ALASKA "F-_�Il =IVR) ALASKA OIL AND GAS CONSERVATION COMMISSION i A L.* &.1'1/ iL IV REPORT OF SUNDRY WELL OPERATIONS 1. Operations Performed JAN 02 2020 Abandon ❑ Plug Perforations 0 Fracture Stimulate ❑ Pull Tubing ❑ Operations shutdown ❑ Suspend ❑ Perforate 0 Other Stimulate ❑ Alter Casing ❑ Chang pypvpd prpgcaRl� ❑ Plug for Rednll ❑ Perforate New Pool ❑ Repair Well ❑ Re-enter Susp Well ❑ Other: 1 t e 0 2. Operator Name: BP Exploration (Alaska), Inc 4. Well Class Before Work Development 0 Exploratory ❑ 5. Permit to Dnll Number 212-001 3. Address: P.O. Bax 196612 Anchorage, AK 99519-6612 Stratigraphic ❑ Service 6. API Number: 50-029-23463-00-00 1 7 Property Designation (Lease Number): ADL 028262 & 28245 S. Well Name and Number: PBU Z-50 9. Logs (List logs and submit electronic and printed data per 20AAC25.071): 10. Field/Pools: PRUDHOE BAY, PRUDHOE OIL 11. Present Well Condition Summary: Total Depth: measured 11070 feet Plugs measured 11010 feet true vertical 8983 feet Junk measured None feet Effective Depth: measured 11010 feet Packer measured 8676 feet true vertical 8968 feet Packer true vertical 8431 feet Casing: Length: Size: MD: TVD: Burst: Collapse: Structural Conductor 80 20" 35-115 35-115 Surface 3164 9-5/8" 34-3198 34-3163 5750 3090 Intermediate 8963 7" 32-8995 32-8693 7240 5410 Production Liner 2271 4-1/2" 8797-11068 8530-8982 8430 7500 Perforation Depth: Measured depth: 9216-10982 feet True vertical depth: 8859-8962 feet Tubing (size, grade, measured and true vertical depth) 4-1/2" 12.6# 13Cr85 30-8800 30-8533 Packers and SSSV (type, measured and 4-1/2" HES TNT Perm Packer 8676 8431 true vertical depth) No SSSV Installed 12. Stimulation or cement squeeze summary: Intervals treated (measured): 9276 - 10944 Treatment descriptions including volumes used and final pressure: Bullhead 277 bbl 1% KCL & 80 bbls diesel to underbalance well. Lay in 8.6ppg Cement from 10949' (Bag) up to 9000' with closed choke. Achive 1000 psi bump and cut cement at 118 bbls pump, lay in remaining cement to 7005'. Successfull squeeze to 2000 psi over baseline WHP. RIH w/ Baker MHA w/ 3.80" 8 blade PDC mill. Tag TOC @ 8513' and begin milling. Milled down never really seeing any motor work and zero stalls, hit a hard stall @ 10975'. Final Pressures: OA = 0 psi, IA = 525 psi, TBG = 1620 13. Representative Daily Average Production or Injection Data Oil -Bbl Gas-Mcf Water -Bbl Casing Pressure Tubing Pressure Pnor to well operation: Shut -In 225 1480 Subsequent to operation: Shut -In 450 300 14. Attachments: (required v,20n C25.070.25 071, &26.283) 15. Well Class after work: Daily Report of Well Operations 0 Exploratory ❑ Development 0 Service ❑ Stratigraphic ❑ Copies of Logs and Surveys Run ❑ 16. Well Status after work: Oil 0 Gas ❑ WDSPL ❑ Printed and Electronic Fracture Stimulation Data ❑ 1 GSTOR ❑ WINJ ❑ WAG ❑ GINJ ❑ SUSP ❑ SPLUG ❑ 17. 1 hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry Number or N/A if C.O. Exempt: NIA Authorized Name: Youngmun, Alex Contact Name: Youngmun, Alex Authorized Title: Kuparuk & Schrader Bluff PE Contact Email: younak@BP.mm Authorized Signature: MWY04v^1/U ✓r- Date: 112 1 1LO Contact Phone: +1 907 564 4864 Form 10.404 Revised 04/2017 ®/�� IBDMS.�JAN 0 3 2020 Submit Original Only Daily Report of Well Operations PBU Z-50 ACTT VITV r1ATF c I I.... A M, ***WELL S/I ON ARRIVAL**'(liner sqz) DRIFTED TBG W/ 3.80" GAUGE RING TO DREAM CATCHER@ 8788' MD. MOVED DREAM CATCHER UP HOLE FROM 8788' MD TO 3523' SLM. 2/12/2019 ***MOVE TO WEATHER TICKET*** ***CONT'D FROM 2/12/19 WSR***(liner sqz) LRS PUMPED 72 BBLS HOT DIESEL DOWN TUBING. PULLED 4 1/2" ROCK SCREEN FROM 3838' SLM. (packing all but missing, empty except 2 small chunks of rubber) DRIFTED WITH 2.50" CENT AND 1.75" SBLR TO 9340' SLM. BAILER HAD 1/2 CUP OF HARD PARRAFIN. 2/13/2019 ***CONT ON 2-14-19 WSR*** ***CONT FROM 2-13-19 WSR***(Liner sqz) B&F W/4 1/2" BRUSH, 3.80" G -RING TO 8,800' SLM LRS PUMPED 70 BBLS OF HOT DIESEL DOWN TBG FOR B&F SET 4-1/2" X -CATCHER @ 8,634' SLM / 8,647' MD PULLED STA #3 BK-OGLV FROM 6,748' SLM / 6,759' MD PULLED STA #4 BK-LGLV FROM 5,426' SLM / 5,440' MD PULLED STA #5 BK-LGLV FROM 3,317' SLM / 3,335' MD SET STA's #5 & #4 BK-DGLV's LRS LOADED IA W/ 150 BBLS CRUDE SET STA #3 BK-DGLV 2/14/2019 ****CONT JOB ON 2/15/19**** ****CONT. JOB FROM 2/14/19**** (Cement squeeze) RAN KJ, 4-1/2" GS, S/D @ 7,710' SLM (Unable to pass, sticky) RAN 4-1/2" BRUSH, 3.80" G -RING TO X -CATCHER @ 8,631' SLM PULLED 4-1/2" X -CATCHER FROM 8,631' SLM / 8,647' MD (Empty) LRS LOADED TUBING W/ 140 BBLS CRUDE (IA tracking) SET 4-1/2" X -CATCHER @ 8,631' SLM / 8,647' MD RAN KJ, 4-1/2" OK -6.1.25" LIB TO STA's #5, #4, #3, #2 (All valves in pockets) RAN KJ, 4-1/2" OK -6,1.25" LIB TO STA #1 (Impression inconclusive) RAN KJ, 4-1/2" OK -1, 1.25" LIB, S/D IN STA #3 WHILE RIH RAN KJ, 4-1/2" OK -1, 1.25" LIB TO STA #1 (Impression of valve in pocket) LRS PUMPED 30 BBLS CRUDE DOWN TBG (IA tracking) RAN 4-1/2" D&D HOLEFINDER, S/D IN X -NIP @ 2,204' SLM / 2,227' MD ****CONT. JOB ON 2/16/19**** 2/15/2019 ***DRIFTED TO 2,500' MD W/ 20'x 3.70" FOR SUBSIDENCE SURVEILENCE**** ***Continued from 02-14-19 WSR*** (LRS Unit 70 -Assist Slickline:MIT-IA/Cement Squeeze) Loaded TBG with 140 bbls 80* crude for differentia to IA. TBG/IA still communicating. Slickline trouble shot valves. Pumped 30 bbls crude down TBG to see if IA is communicating. ***Continued 2/15/2019 on 02-16-19 WSR*** ****CONT. JOB FROM 2/15/19**** (Cement squeeze) RAN 4-1/2" D&D HOLFINDER, S/D ON CATCHER @ 8,647' MD (Pressure up to 1000 psi & holding) PULLED 4-1/2" X -CATCHER FROM 8,647' MD (Empty) LRS PERFORMED MIT -IA TO 3,313 psi - PASSED 2/16/2019WELL LEFT S/I & PAD -OP NOTIFIED OF STATUS UPON DEPARTURE**** % CTU - 1.75" Coil Job Objective: Perf liner, Cement Squeeze. MIRU CTU. Standby for WSL training. Make up 2.4" GR/CCL carrier with 3.50" JSN drift and RIH. Load well it 1 % KCI w/ SafeLube. 5/3/2019 ...Continued on WSR 5-4-19... Daily Report of Well Operations PBU Z-50 CTU #9 - 1.75" Coil ***Cont. from WSR 5-3-19*** Job Objective: Perf liner, Cement Squeeze. RIH w/ HES 2.40" GR/CCL Logging Carrier & 3.50" JSN. Tag TD at 10953' ctm. Unable to jet past. Log from compression up to 9000'. Flag pipe at 10400'. Pooh. Receive good data (+3' Correction). Corrected TD = 10955.98' (SIv #1). MU Perf gun run #1 w/ HES 2-7/8" x 2' MaxForce Perf Gun. Tag TD & correct depth. Perforate Interval 10942'- 10944' POOH. MU Per' gun run #2 w/ HES 2- 7/8" x 2' MaxForce Perf Gun. Tag TD &correct depth. Perforate Interval 10490' - 10492', POOH. 5/4/2019 ...Job continued on 5-5-19... CTU #9 - 1.75" Coil ***Cont. from WSR 5-4-19*** Job Objective: Pert liner, Cement Squeeze. Pooh with Perf Gun #2. All shots fired, ball recovered. Trim 65' of Coil. MU & RIH w/ HES 2-7/8" x 2' MaxForce Perf Gun #3. Tag TD & correct depth. Puh & Perforate Interval 10320' - 10322'. Pooh. All shots fired, ball recovered. MU & RIH w/ HES 2-7/8" x 2' MaxForce a un . ag M correct depth. Puh & Perforate Interval 10100'- 10102' POOH. MU & RIH w/ HES 2-7/8" x 2' MaxForce PerfGun #5. Tag TD & correct depth. Puh & Perforate Interval 9850-9852'. POOH. 5/5/2019 ...Continued on 5/6/19 WSR... CTU #9 - 1.75" Coil ***Cont. from WSR 5-5-19*** Job Objective: Perf liner, Cement Squeeze. Pooh w/ Perf Gun #5. All shots fired, ball recovered. Trim pipe & change packoffs. MU & RIH w/ 2.50" BDJSN Cement BHA. Tag TD at 10953' down / 10949' up. Pick up 5' from weight back & flag pipe. Bullhead 277 bbl 1 % KCL & 80 bbls diesel to underbalance well. Lav in 8.6ppg Cement from 10949'(flag) up to 9000' with closed choke. Achive 1000 psi bump and cut cement at 118 bbls pump lav in remaining cement to 7005' Squeeze to 2000 psi over baseline WHP 5/6/2019 ...Continued on WSR 5-7-19 CTU #9 - 1.75" Coil ***Cont. from WSR 5-6-19**" Job Objective: Perf liner, Cement Squeeze. Successfull squeeze to 2000 psi over baseline WHP. Launch ball and begin to contaminate cement. Tag high at 8544 and encountered bridges of setting up cement under thickening time. Able to work into liner at max rate but could not pass 8920 CTMD. Pooh & MU 3.0" DJN BHA. Tag at 8557'. Work down to 8775' which is above where previous nozzle made it. Having frequent sit downs & overpulls. Discuss situation with APE - APE says to call it good and chase ooh. Pump 33 bbl gel sweep & chase ooh at 80%. Reciprocate across jewelry. Left gel from 8775' to 8500'. Lay in 60/40 Meth Freeze Protect from 2500'. Rig down CTU. TOC at — 8920'. 5/7/2019 ***Job Incomplete - Will return at later date**" CTU #9. 2.0" Coil 0.156 WT Job Objective: Mill, Adperf Arrive on location. Perform seven day BOP test. MU & RIH w/ Baker 3-1/8" MHA w/ 3.80" eight blade PDC mill. 6/18/2019 ..In progress... CTU #9. 2.0" Coil 0.156 WT. ***Continue from 6/18/19*** Job Objective: Mill, Adperf Continue RIH w/ Baker MHA w/ 3.80" 8 blade PDC mill._Tag TOC @ 8513' and begin milling. Milled down never really seeing any motor work and zero stalls, hit a hard stall @ 10975', most likely the 3.5" XO. Pumped a 20 bbl get pill followed by a 3/4" ball to pop circ sub while on bottom. POOH chasing returns. ***Cement Milled down to 10993' MD (4-1/2" x 3-1/2" XO). TOC @ 10993' MD."** 6/19/2019 I..In progress... Daily Report of Well Operations PBU Z-50 CTU #9.2.0" Coil 0.156 WT. ***Continue from 6/19/19*** Job Objective: Mill, Adperf POOH from milling. Attempted injectivity test but was fairly tight. Had a 1.2 bbl LLR over ten minutes @ 1500 psi. Lay in 50/50 methanol from 2500' to surface. Unable to perforate due HES TCP stand down. RDMO 6/20/2019 ...Job incomplete... CTU #8 1.75" coil 0.156WT Objective: Perforate Standby for well support to rig up. Begin rigging up CTU. 12/3/2019 ***Job Continued on 12/4/19 WSR*** CTU #8 1.75" coil 0.156WT Objective: Perforate Finish rigging up CTU. MU & RIH w/ Baker MHA & HES memory GR/CCL inside 2.40" carrier w/ 3.50" JSN. Tag solid bottom @ 10980' CTM and log from compression up to 9000' while circulating in Slick 1 % KCI w/ Safelube down coil. Painted WHITE FLAG @ 10873'. POOH. Confirm good data (+4' correction, correlated to PDS Coil Flag dated 21-NOV-2013). MU & RIH w/ gun #1, 31'2-7/8" PJO guns. Perforate 10952'- 10982'. POOH. 12/4/2019 ***Job continued on 12/5/19 WSR*** CTU #8 1.75" coil 0.156WT Objective: Perforate Finish POOH with gun #1. Confirm shots fired and ball recovered. MU & RIH w/ gun #2. Perforate 10944'- 10962'w/ 2-7/8" PJO, 6 SPF, 60* phasing. MU and RIH with HES memory GR/CCL. Log at 50 fpm from TO at 10895' (CTM) to 8950'. Paint a RED flag at 10899.7'. POOH. Confirm good data (+6' correction, correlated to PDS Coil Flag dated 21-NOV- 2013). Stand by for SLB TCP, 12/5/2019 ***Job Continued on 12/6/19 WSR*** CTU #8 1.75" coil 0.156WT Objective: Perforate MU & RIH w/ gun #3. Perforate 10314'- 10344'. POOH. Shots fired and ball recovered. MU & RIH w/ gun #4. Perforate 4' - 10,314'. POOH. Shots fired and ball recovered. Perform weekly BOP test. 12/6/2019 ***Job Continued on 12/7/19 WSR*** CTU #8 1.75" coil 0.156WT Objective: Perforate MU & RIH w/ gun #5. Perforate 10254' - 10284'. Pump 63 bbls 1% slick KCL w/ safelube down backside with 5 bbl 60/40 cap. Confirm shots fired, Ball recovered. MU & RIH w/ gun #6. Perforate 9870'- 9900'. POOH, shots fired and ball recovered. MU & RIH with gun V. Perforate 9840'- U8/0'.shots fired, ball recovered. Trim 100' pipe, change packoffs. MU & RIH w� / g—un 8 12/7/2019 ***Job Continued on 12/8/19 WSR*** CTU #8 1.75" coil 0.156WT Objective: Perforate Continue RIH w/ gun #8. Perforate 9810'- 9840'. POOH, shots fired and ball recovered. MU & RIH w/ gun #9. Perforate 9271'- 9296'. POOH. MU & RIH w/ gun #10. Perforate 9216'-9247'. POOH. Freeze protect tubing. Shots fired and ball recovered. RDMO. 12/8/2019 ***Complete*** 2oI 19124 TOR 113 II A-53,2 15.5# D = 19.124" BTC, D = 8.835" 319W Minimum ID = 2.992" @ 10993' 4-1/2" X 3-1/2" XO TOP OF 4-12"LNR I-1 8797' 4-12" TBG, 12.6#, 13CR-85 VAM TOP, 8800' .0152 bpf, D = 3.958" 7" CSG, 26#, L-80 TC11, .0383 bpf, D= 6276" $995' HES "DURASLFFVF" xD SI n s1 V In =3 n4n- SIZE NO# TOP DEPTH O/C DATE 4-12" 8 9291 S 05/07/19 4-12" 7 9406 S 05!07/19 4-12" 6 9742 S 05/07/19 4-12" 5 9886 S 05/07/19 4-12" 4 10175 S 05/07/191 4-12" 3 10345 5 05/07/19 4-12" 2 10771 S 05/07/19. 4-12" 1 1 1 10955 1 S 05/07/19 O=OPEN C=CLOSED PERFORATION SUMMARY REF LOG: ANGLE ATTOP PERF: 49" @ 9216' Note: Refer to Pmdwtion DB for historical perf data SEE SPF. NfERVAL OpNSgz FSHOTF SQZ -SEEN PG 2 FOR PERFORATIONS- PBTD 11030' LNR 12.6#, 1pf, D = 3.9 SAFETY Z 0 CHROME TBG 8, L1�L ANGLE> 70" 0 9459' -4-112" 1 2227' I GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE 5 3335 3299 5 KBG-0-5 DMY BK r 0 02/15/1 4 5440 5404 1 KBG-4-5 DMY BK r 0 02/15/1: 3 6759 6722 3 KBG-0-5 DMY BK F 0 02/15(1! 2 7748 7649 32 KBG4-5 DMY BK 0 loami1 1 8571 8344 33 KBG4-5 DMY BK 0 02/05/1: 8647' J-4-12" HES X NP, D = 3.813- TOP DEPTH MND 8676' 7 x 4-i/2' HES TNT PKR ID= 3 8711' 4-12" HES X NP, D = 3.813" 7 4-12" 8788' 4-12^ HES X NP, D = 3.813^ 6 4-12" 8797' 7" X 5" BKR HRD-E ZXPN LTP w 111' TIEBACK, D = 4.320" 5 8800' 4-12" WLEG, D = 4.00" [ IM I I NU I LO Ei) I 7" X 5" FLEX -LOCK LNR HGP ID = 4.32" 5"X 4-1/2'X HES SWELL PACKER ASSEMBLY JD SIZE TOP DEPTH MND 8 4-12" 9205 3.958" 7 4-12" 9309 3.958" 6 4-12" 9424 3.958" 5 4-12" 9762 3.958" 4 4-12" 9906 3.958" 3 4-12' 10197 3.958" 2 4-12" 10376 3.958" 1 4-12" 10808 3.958" 10955' 1-1 RESTRICTION AT SLV#1 -r V:r/� I,oRtt Dnr-I IUUL VCKFIOATION SUIS D=3.91" 10993' 4-12' X 3-12" XO, D = 2.992' 10995' 312' HES ANCHOR SWELL PKR D =2.992' 11026' 43-10-14-117 4-12" XO, D = 2.992' 1010' CTMD 3-12" C13P (06107/121 DATE REV BY COMMENTS DATE REV BY COMMENTS 04/28/02 0-14 INITIAL COMPLETION 1226/19 KFM/JMD ADPERFS 0724/17 CJIWJMD GLV C/O 21/17 1226/19 OD/JMD UPDATE BF EL 09/18/17 RB/JMD RESET DREAMCATCHER 9/13/17 1227/19 TFA/JMD MILLEOTBGCMT 06/19/19 02/19/19 GIB/JMD GLV C/O 02/15/19 02/19/19 JMG/JMD PULLED DREAMCATCHER 06/18/19 TFAIJMD PERF/SQZ PRUDHOE BAY UNIT WELL: ZSO PERMRNo: 2120010 APINo: 50-029-23463-00 SEC 19 THN RI 2E, 985'FNL 82107' BP Exploration (Alaska) PERFORATION SUMMARY REF LOG: ANGLE AT TOP PERF: 49" @ 9216' Note: Refer to Production DB for Nstodcal perfdata SIZE SPF INMRVAL OprvSQz SHOT I SOZ 2-7/8" 6 9216-9247 O 12/08/19 02/19/19 GJB/JMD GLV C/O 02/15/19 2-78" 6 9271-9296 O 12/08/19 2-7/8" 6 9276-9278 S 12/05/16 05/07/1 2-78" 6 9352-9354 S 12/05/16 05/07/1 2-71B" 6 9620-9622 S 12/05/16 05/07/1 2-78" 6 9810-9840 O 12/08/19 2-78" 6 9840-9850 O 12/07/19 2-78" 6 9850-9852 S 05/05/19 05/07/1 2-78" 6 9850-9852 0 12/07/19 2-78" 6 9852-9900 0 12/07/19 2-78" 6 10100 -10102 S 05/05/19 05107/1' 2-78" 6 10254 -10284 O 12/07119 2-78" 6 10284 -10320 0 12/06/19 2-78" 6 10320 -10322 S 05105/19 05107/1 2-78" 6 10320 -10322 O 12/06/19 2-78" 6 10322 -10344 O 12/06119 2-78" 6 10490 -10492 S 05104/19 05/07/1! 2-78" 6 10942-10944 S 05/04/19 05/07/11 2-78" 6 10944 -10952 0 12/05/19 2-78" 6 10952 -10962 0 12/05/19 2-78" 6 10962 -10982 0 12/05/19 SAFETY NOTES: WELL ANGLE> 70° @ 9459' """ 4-1/2" CHROM E TBG & LNR """ PRUDHOE BAY UNIT WELL: Z50 PERMITNo:'1120010 API No: 50-029-23463-00 SEC 19 THN R12E 985' FNL & 2107' FFWL DATE REV BY I COMMENTS DATE REV BY COMMENTS 0428112 0-14 1 INITIALC9MPLETI0N 1226/19 KFM/JMD ADPERFS 0724/17 CJWJMD GLV Cb 721/17 1226/19 DO UPDATE BF ELEV 09/18/17 RB/JMD RESET DREAMCATCHER 9/13/17 1227/19 TFA/JMD MILLED TBG CMT 06/19/19) 02/19/19 GJB/JMD GLV C/O 02/15/19 02/19/19 JMG/JMD PULLED DREAMCATCHER BP Exploration (Alaska) 06/18/19 TFA/JMD PERF/SOZ co O + >7 M > 0M •c w 0 • N 8 E Q o U a x wN a 01 U � >. > c C c i /N m vzaaoq ,, p Z a 75 N CO H Nu) >. >. >. 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F LJ3 ? r 1 O O 1 O / M ' Z / z / z co M Z } } >- (11 N 0 N L T N N co '1%4 Q a o z Z L = o a 0 a 2 It Q O o 2 0 j J O q 111►! a a 1- Qcn co % 0 OC < o 0 L OZ = w o CL O p O rn o W g o Ce 0 a u E x a) co 11.1 N N l!J J N m a V a. m 5 E J co Z0 r0+ fn < , O O O i ) m` = -o E 1 a.O '� 2 U U C M '1 N O N in o Z I V v / 1 J >- >- < Q 1"— N m z N O 35 S Z ip G = N O Cc a) Z' CO (13 m (NIV' o H E iP, 7 M w N _c (A CO = l4 U N C V� D ° c co a 11111 - c c a 1\I Q a .o m O Z E y > 0 to Z 1 11 N 1 `, Q 1 co Z 110'it co >- r �, z03 N £ o Lo; N c o 0. N N p O co ,_ 1 re a a n I— m O - g O C d E 0 o a N 1 O C 2 E C iV ° D TAL GED� tt/ 2013 ACLU 1 3 2013 M K BENDER AOGCC Schiumberger 2200 Drilling & Measurements 237.W MWD/LWD Log Product Delivery Customer BP Exploration Alaska Inc Dispatched To: Makana Bender Well No Z-50 Date Dispatched: 13-Aug-13 Installation/Rig DOYON 14 Dispatched By: STEPHANIE PACILLO Data Survey No Of Prints No of CDs Z-50 Log 1 1 2 in MD 1 2inTVD 1 5 in MD 1 5 in TVD 1 Received By: m 0,64 Please sign and return one copyto: Drilling&Measurements 2525 Gambell Street,Suite 400 Anchorage,Alaska 99503 hecheto@slb.com Hector Echeto Fax:907-561-8317 TRANSMITTAL#:6394 McMains, Stephen E (DOA) ,' / ,9 — JO / From: McMains, Stephen E (DOA) Sent: Monday, August 05, 2013 3:00 PM To: 'Ramos, Tania ((Udelhoven Oilfield System Services (UOSS))' Cc: 'howard.okland@alaska.org' Subject: Missing Well Logs Tania, I notice some more missing logs. PTD 212-138, PBU Z10A has a missing MWD SSTVD. ( PTD 212-001, PBU Z-50 is missing GR, RES GR, RES, DEN, NEU GR, RES, AZI DEN, NEU Log missing. These log were listed in block 21 of t4he completion report as being run and AOGCC has not received them as of today. Email Tania Ramos today. Steve McMains 793-1233 (.1.--C1---C-------> (3 )418 22-001 z2-5 2 0 o G7 r ' c) p p p p .ppiCI p10p p 00p:0 p p p0 0 ET T T T r T T T T T a- T•T T T T T T T T {D kkk E LI' U 1-4 o Z O U o U � I1 1 Rs H T TT TTT TT T T T TTT T T T O Y �{ 1) O FC ` ' n w 09n-1 i I rte! O = E-1 0 '-u Z VI I� m a rn O u-cd II 1111B 2 o ,�v� m rj� Z tin E w S K. I �' m L7 rn 1.i1 vl �.L� o i N Q t� 4� I.4 ",) m m m'm m m m M m m m Cd CV m cm c m m m = 7_4, I fa T T T 'T T T T Y T -T' T I T I T T T T T T T T N OA �i �� .E " i " " C .o ._o U U C C w `. L v ro O t t� cv IV '° CU, m : d : CD ' 0) 03 d it ea: : as a, d v C o 03 . O T e# cC :CO O co CN T In T OC CN L COU] I -+ ,,T m C I .cry CN,CV �� N c0 ..� a- NI T C4 m N T X Q :./CA.:17, 0 Z/- Z . 0 , f O 0 u) J P O > LU 2 J J a' a' X LL WLL 0 LL LL r W r c '„ 'e _1 _ J a 1- Xp a O a a p u§1 a W a CL U a ILI a J a W a CC NOL p acoC m e a JJ ZIZZ22Z2 ,422x _ 2ZZI- ZZ Ou) UOWWOWWWUJ mWOOyOO 2 Ct 2 2 2 2 2 2 J 2 E cn,cn 2 2 2 p 2 2 I— .M-' m Q ..`.-IX X XX , X X X X X A N ii 0 Iii Z 'u X X XXXXXXX X a a cc C E"D :-1 J N l() W m c0 m T 00 0 0 T T r- .. Coc co O 0) T r!y m OQ cr Ce R O m r Cn ^% co i- O ✓:3 �! T 0 e0 I- -O e0 K) e0 Z O T O O CV T T O o 1-- W ' O O O O O 00 0 — .o O 00 00 O O O O > cc O O O O 'O O O O W -O O O 00 O O O O O a 10 0 O ' O o :N o 9 0 Ki 4 Z LL O 4 4 Ki X 4 oS O ^ = 2T< >7 -) R- R >703 -) = 2 Q re M M m M D o Q LL In In U In in In a U Q u. m U Q < 00 -) Q v cc CO . o m U U U U U U U Q U m U U 03 OO m U U 00 c o p a.. V) c 'N > 0 — CD ,i-) 0, R no m cmrn Off. a )< Q O1 W. m Q p m 03 W J U co O T CO N m CO J mM 4 m N O0 a1 00 .121 N ro.E z C) o�D • '�..41:::30 ,-, ° ,- CV rs- OT T Sr) C4 1 0,„ O Q1 T N N d ,c , Z CO m :� Z c0 P� 00 f�! �j J O CV W O t o Z C'1 Z -� o C7 o a T T 0_ 0 0 CO w Ln s cc 2 p u v y Ca t,,,LJ v p. o C v) o CI9 N as C� 1 x a m rn Q McMains, Stephen E (DOA) From: Lastufka, Joseph N (Northern Solutions) [Joseph.Lastufka@bp.com] Sent: Tuesday, June 19, 2012 9:20 AM To: McMains, Stephen E (DOA) Subject: PBU Z-50/ PTD#212-001 Hi Steve, Please reference the following well: Well Name: PBU Z-50 Permit#: 212-001 API #: 50-029-23463-00-00 Date of Test: 6/17/2012 Type of Test: IPT (Initial Production Test) Choke Size: 96 Choke Unit: Degrees Production Method: Flowing Duration (Hours Tested): 4 Top Reference (Top Perf MD): 9291' Bottom Reference (Bottom Perf MD): 10955' Tubing Flowing (Pressure): 360 Casing Pressure: 1180 Total Test (Rate f/0, W, G): 1052 / 95 / 920 24-Hour Rate (0, W, G): 6312 / 570 / 5522 Gravity (Oil, API): 25.9 GOR (Gas-Oil Ratio): 875 This well began Production on Method of Operations on this date: 6/13/2012 Rf3DMS JUN 1 9 2012 McMains, Stephen E (DOA) From: Lastufka, Joseph N (Northern Solutions) [Joseph.Lastufka@bp.com] Sent: Monday, June 18, 2012 3:42 PM To: McMains, Stephen E (DOA) Subject: 10-407 Corrections a t _. co Steve, I've been made aware of 2 corrections on 10-407's that could use hand corrections... SD311116 — Surface X coordinate should be 726671 not 762671. F-08B—Total Depth coordinate should be 5970147 not 647174. Please let me know if you have any questions. Thanks!! Joe RBDMS JUN 19 2012 le/ki 1 T by BP Exploration(Alaska)Inc. Attn:Well Integrity Coordinator, PRB-20 Post Office Box 196612 Anchorage,Alaska 99519-6612 May 25, 2012 Mr. Jim Regg © 1 Alaska Oil and Gas Conservation Commission L, 333 West 7th Avenue SO Anchorage, Alaska 99501 Subject: Corrosion Inhibitor Treatments of GPB Z-Pad Dear Mr. Regg, Enclosed please find multiple copies of a spreadsheet with a list of wells from GPB Z- Pad that were treated with corrosion inhibitor in the surface casing by conductor annulus. The corrosion inhibitor is engineered to prevent water from entering the annular space and causing external corrosion that could result in a surface casing leak to atmosphere. The attached spreadsheet represents the well name, API and PTD numbers, top of cement depth prior to filling and volumes of corrosion inhibitor used in each conductor. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of form 10-404, Report of Sundry Operations. If you require any additional information, please contact me or my alternate, Gerald Murphy, at 659-5102. Sincerely, , 1 Mehreen Vazir BPXA, Well Integrity Coordinator BP Exploration (Alaska ) Inc. Surface Casing by Conductor Annulus Cement,Corrosion inhibitor,Sealant Top-off Report of Sundry Operations(10-404) Z-Pad Date:05/0212012 Corrosion Initial top of Vol.of cement Final top of Cement top off Corrosion inhibitor/ Well Name PTD# API# cement pumped cement date inhibitor sealant date ft bbls ft na gal Z-01B 2081080 50029218300200 Z-02A 1960430 50029218140100 Z-03 1971310 50029227870000 Z-04A 2042300 50029219900100 Z-05 1900780 50029220560000 Z-06 1880320 50029217980000 Z-07A 1931100 50029220460100 Z-08A 1931280 50029217870100 Z-09A 2081410 50029219670100 Z-10 1891160 50029219860000 Z-11A 2050310 50029220530100 Z-12 1891020 50029219770000 Z-13A 2042030 50029220690100 Z-14B 2060990 50029218440200 Z-15 1880880 50029218490000 Z-16 1920120 50029222450000 Z-17 1891390 50029220010000 Z-18 1890960 50029219710000 Z-19A 2061050 50029222510100 Z-20 1881000 50029218590000 Z-21A 2001010 50029219380100 Z-22B 1960350 50029220370200 Z-23B 2041080 50029219500200 Z-24 1890180 50029219170000 Z-25 1881590 50029219020000 Z-26A 2060790 50029219450100 Z-27 1900310 50029220220000 Z-28 1881270 50029218790000 Z-29 1890650 50029219540000 Z-30A 2032190 50029220130100 Z-31 1881120 50029218710000 Z-32BL1 1970350 50029219246000 Z-33A 1890050 50029218950100 Z-35 1980930 50029228840000 Z-38 1980600 50029228730000 Z-39A 2042240 50029229950100 Z-40 2111730 50029234620000 1.3 NA 1.3 NA 15.3 4/7/2012 Z-46A 2052030 50029232800100 Z-50 2120010 50029234630000 1.3 NA 1.3 NA 13.6 5/2/2012 Z-65 2110910 50029234510000 1.4 NA 1.4 NA 12.8 4/7/2012 Z-67 2110130 50029234410000 2.8 NA 2.8 NA 34.0 4/8/2012 Z-100 2031710 50029231820000 Z-101 2001620 50029229780000 Z-102 2070500 50029233530000 Z-103 2042290 50029232350000 Z-108 2052010 +50029232920000 Z-112 2071720 50029233800000 Z-113 2110840 50029234500000 1.8 NA 1.8 NA 12.8 4/7/2012 Z-116 2111240 50029234550000 3.0 NA 3.0 NA 22.1 4/8/2012 212001 21Go1 O 0 0 ® 0 CI 0 O 0 0 0 0 0 0 7- r cr r — r r O z ,.- ,- O O T aj O N ,- c o - Z b.0 — N 0.1 cil 0_ L N i E ;_r_ N N N N Cy N N 7U 4) ,"1" 1- r e.. a- N N hD ro } , >0. 1- s-a _ ' > I- i (N s- L 9 4. O N Y) 1$) Cp N U C ,QCs' r Q- - N N w- X G_ 0 Q .1 i J art O re W III CL Pn o w O U u. O Lu J w J 7.f 1 — J o O C3 Ce D U 2 LL O 2 w P a- O ww > NC/) Ce UJ J 2 J > > c 2 I- 0 N N _( LO O) A 0 rI N N N X X X X X X X Q < O 1— H N_ c an B,- 0 a() N C- 0 p rn 2' u O O 0 0 0 O �+ --,< 0 0 0 0 0 0 0 0 >- ?-° OC O O O O Q�Y O O 0O;as N o < 7 co c.) co v e4 NO I— or4s •L O M < 0 3- CO N0 C O ch0 CO 03 m m 0 m to o N -ti.. in v O ^, .- > 01 > „_4 OD `, Cil CO EE crl 7,7 G n t't, L• ti N C - W M 1.0 O WC Y ON N nr > _ o 0 aa. (1) _--_ O N et? N 0 v N co O n V r1. — r m h u pki v 0_ 0 C n3 — "." X a c0 Ol Q I i^ Q 0 N < t N Ut1 V tU MAY 232012 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION AOGCC WELL COMPLETION OR RECOMPLETION REPORT AND LOG la. Well Status: ® Oil 0 Gas 0 SPLUG 0 Other 0 Abandoned 0 Suspended lb. Well Class: 20AAC 25.105 20AAC 25.»0 ® Development • 0 Exploratory 0 GINJ 0 WINJ 0 WAG 0 WDSPL 0 Other No.of Completions One 0 Service 0 Stratigraphic 2. Operator Name: 5.Date Comp.,Susp.,or Aband.: 12. Permit to Drill Number: BP Exploration(Alaska)Inc. 4/28/2012 • 212-001 • 3. Address: 6.Date Spudded: 13. API Number: P.O. Box 196612,Anchorage,Alaska 99519-6612 4/1/2012 • 50-029-23463-00-00 ' 4a. Location of Well(Governmental Section): 7.Date T.D.Reached: 14. Well Name and Number: Surface: 4/21/2012 PBU Z-50 • 4296'FSL,2847' FEL, SEC. 19,T11 N, R12E, UM _g, KB(ft above MSL): 89.65' • 15.Field/Pool(s): Top of Productive Horizon: 3732'FSL,4193'FEL, SEC. 19,T11 N, R12E, UM y� GL(ft above MSL): 56.2' • Prudhoe Bay/Prudhoe Bay - Total Depth: oTE4"I 9.Plug Back Depth(MD+TVD): 3003'FSL, 843'FEL, SEC.24,T11N, RILE, UM ‘5144 11030' . 8973' • _ 4b. Location of Well(State Base Plane Coordinates,NAD 27): 10.Total Depth(MD+TVD): 16. Property Designation: Surface: x- 599831 • y- 5959100 • Zone- ASP4 11070' • 8983'•. ADL 028262&028245 TPI: x- 598494 y- 5958519 Zone- ASP4 11.SSSV Depth(MD+TVD): 17. Land Use Permit: Total Depth:x- 596898 Y- 5957769 Zone- A8P4 None 18.Directional Survey: 0 Yes ❑No 19.Water depth,if offshore: 20. Thickness of Permafrost(TVD): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1939' 21. Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): 22. Re-Drill/Lateral Top Window MD/TVD: MWD/GR/RES,GR/RES/DEN/NEU, GR/RES/AziDEN/NEU N/A 23. CASING,LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT CASING WT.PER FT. GRADE Top BOTTOM Top BOTTOM SIZE CEMENTING RECORD PULLED 20" 90# H-40 Surface 80' Surface 80' 42" 260 sx Arcticset(Approx.) 9-5/8" 40# L-80 35' 3198' 35' 3163' 12-1/4" 1187 sx DeeDCrete.408 sx Class'G' 7" 26# L-80 33' 8995' 33' 8693' 8-3/4" 492 sx LiteCrete. 184 sx Class'G' 4-1/2" 12.6# 13CR85 8797' 11068' 8530' 8982' 6-1/8" Uncemented Slidina Sleeves 24. Open to production or injection? ®Yes 0 No 25. TUBING RECORD If Yes,list each interval open SIZE DEPTH SET(MD) PACKER SET (MD+TVD of Top&Bottom;Perforation Size and Number): (MD/TVD) 4-1/2"Sliding Sleeves w/swell packers 4-1/2", 12.6#, 13CR85 8800' 8676'/8431' MD TVD MD TVD 9291' 8905' 26. ACID,FRACTURE,CEMENT SQUEEZE,ETC. 9406' 8963' 9742' 9010' -,. "--r[O 4 DEPTH INTERVAL(MD) AMOUNT AND KIND OF MATERIAL USED 9886' 8933' 10175' 8929' lip t ' -. 2000' Freeze Protect w/74 Bbls Diesel �1 10345' 8909' .4-17rI 10771' 8917' // 10955' 8956' ,�"_„ .�,,,..,,,.,., 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 4 Flow Tubing Casing Press: Calculated OIL-BBL: GAS-MCF: WATER-BBL: OIL GRAVITY-API(CORR): Press. 24-Hour Rate 28. CORE DATA Conventional Core(s)Acquired? 0 Yes 0 No Sidewall Core(s)Acquired? 0 Yes IS No If Yes to either question,list formations and intervals cored(MD+TVD of top and bottom of each),and summarize Iithology and presence of oil,gas or water (submit separate sheets with this form,if needed). Submit detailed descriptions,core chips,photographs and laboratory analytical results per 20 AAC 250.071. None RBDMS MAY 2 5.2012 ' USF • . G -1174/ iik9A 7 -,�s (z Q `, Form 10-407 Revised 12/2009 CONTINUED ON REVERSE A /) / Submit Original Only12,v 29. GEOLOGIC MARKERS(List all formations and markers encountered): 30. FORMATION TESTS NAME MD ND Well Tested? 0 Yes ®No Permafrost Top If yes,list intervals and formations tested,briefly summarizing test Permafrost Base 1952' 1939' results. Attach separate sheets to this form,if needed,and submit detailed test information per 20 AAC 25.071. UGNU 3232' 3197' None Schrader Bluff N 4376' 4340' Schrader Bluff 0 4553' 4517' Base Schrader Bluff 4899' 4863' HRZ 6459' 6423' Kalubik 6679' 6643' Kuparuk C 6716' 6680' LCU/Kuparuk B 6765' 6729' Kuparuk A 6772' 6736' Miluveach 6842' 6805' Kingak 7548' 7477' Sag River 8989' 8688' Shublik 9022' 8715' Eileen 9156' 8817' Zone 4 9208' 8853' Formation at Total Depth(Name): Zone 4 9208' 31.List of Attachments: Summary of Daily Drilling Reports,Well Schematic Diagram,Surveys 32.I hereby certify that the for go g is true nd r to the best of my knowledge. Signed: Joe Lastufka Title: Drilling Technologist Date: 5/22/12 PBU Z-50 212-001 Prepared By Name/Number. Joe Lastufka, 564-4091 Well Number Permit No./Approval No. Drilling Engineer: Cody Rymut, 564-5452 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 la: Classification of Service Wells: Gas Injection,Water Injection,Water-Alternating-Gas Injection,Salt Water Disposal,Water Supply for Injection, Observation,or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI(Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level elevation in feet above mean sea level. Use same as reference for depth measurements given in other spaces on this form and in any attachments. Item 13: The API number reported to AOGCC must be 14 digits(ex: 50-029-20123-00-00). Item 20: Report true vertical thickness of permafrost in Box 20. Provide MD and ND for the top and base of permafrost in Box 28. Item 23: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 24: If this well is completed for separate production from more than one interval(multiple completion),so state in item 1,and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). Item 27: Method of Operation: Flowing,Gas Lift,Rod Pump,Hydraulic Pump,Submersible,Water Injection,Gas Injection,Shut-In,or Other(explain). Item 28: Provide a listing of intervals cored and the corresponding formations,and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. Item 30: Provide a listing of intervals tested and the corresponding formation,and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 12/2009 Submit Original Only W�LHEAD= F4-1116" ADAC Z-50 r50 SAFE E TB)TES: 8 LNR WELL ANGLE 70"@ 9459' 4-1/2" ACTUATOR= LEO PJC RAFT KB.a.EV= 89.65" II BF.ELEV= 57.65' KOP= 20'CONDUCTOR, — 113` 2227' --{4-1/2"HES X NIP,ID=3.813" Max Angle= 102 @ 9833' A-53,215.5# ' Datum MM= 9265' 13=19.124" Datum TVD= 8800'SS GAS LFTMANDRES ST MD TV[:) DEV TYPE VLIN LATCH PORT DATE 9-5/8"CSG,40#,L-80 BTC,ID=8.835" H 3198' 5 3335 3299 5 KBG-4-5 DMY SBK 0 04/26/12 4 5440 5404 1 KBG-4-5 MK BBC 0 04/26/12 3 6759 6722 3 KBG-4-5 DMY SBK 0 04/26/12 Minimum ID =2.992" @ 10993' 2 7748 7649 32 KBG-4-5 DMY SBK 0 04/26/12 -1/2" X 3-1/2" XO 1 8571 8344 33 KBG-4-5 DMY SBK 0 04/26/12 4I 8647' —I 4-1/2"HES X MP,ID=3.813" 8676' ---17 X 4-1/2"HES TNT PKR,13=3.856" ' 8711' —14-1/2"HES X NIP,ID=3.813" 8797' —7"X 5"BKR I-RDEZXPN LTP TOP OF 4-1/2"LNR --I 8797' w/11'TIEBACK,ID=4.320" I8788' H4-1/2"HES X NIP,ID=3.813" 4-1/2"TBG, 12.6#,13CR 85 VAM TOP, --I 8800' .0152 bpf,ID=3.958" i 8800' —14-1/2"WLEG,0=4.00" \ —I ELMD TT NOT LOGGED 7"CSG,26#,L-80 TCI 1,.0383 bpf,ID=6.276" H 8995' A , 8819' H 7"X 5"FLEX-LOCK LNR HGR,13=4.32" 8829' —{5"X 4-1/2"X0,ID=3.880" ._. i HES SWELL L PAC KER ASSEM BEY I "XD"SLI)SLV,ID=3.813" Cg 1.11 NO SIZE TOP DEPTH MIN ID SIZE NO# TOP DEPTH O/C DATE ( i 1 8 4-1/2" 9205 3.958" 4-1/2" 8 9291 C 03/24/12 Cg -• 7 4-1/2" 9309 3.958" 4-1/2" 7 9406 C 03/24/12 X 1 1 6 4-1/2" 9424 3.958" 4-1/2" 6 9742 C 03/24/12 5 4-1/2" 9762 3.958" 4-1/2" 5 9886 C 03/24/12 4 4-1/2" 9906 3.958" 4-1/2" 4 10175 C 03/24/12 ( 1 1 3 4-1/2" 10197 3.958' 4-1/2" 3 10345 C 03/24/12 CE ._• 2 4-1/2" 10376 3.958" 4-1/2" 2 10771 C 03124/12 11 ' 1 4-1/2" 10808 3.958' 4-1/20 1 10955 C 03/24/12 C3 _. Cg 0141 0=OPEN C=CLOSED ( I I ( 1 I 1 i 109750 —{BKR SHIFT TOOL VERIFICATION SLAB,ID=3.91" 10993' —14-112"X 3-1/2"XO,ID=2.992" 10995' H3-1/2"HES SWELL PKR ELEMENT,ID=2.992" 11026' —I3-1/2"X 4-1/2"XO,U=2.992" PBTD H 11030' 4-1/2"LNR, 12.6#,13CR-B0 VAM TOP, H 11068' lkilkikati .0152 bpf,ID=3.958" DATE REV BY COMMENTS DATE REV BY CONtwENTS IRUDHOE BAY UNIT 04/28/12 D-14 INITIAL COMPLETION WELL: Z-50 04/30/12 PJC DRLG DRAFT CORRECTIONS PERMIT No:°2120010 API No: 50-029-23463-00 SEC 19,T11N,R12E,985'FEL 82107'FVVL BP Exploration(Alaska) North America -ALASKA- BP Page 1 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type:DRL-ONSHORE(DON) I Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date I From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 3/30/2012 14:00 - 15:30 1.50 MOB P PRE PJSM-HAZARD ASSESSMENT,SKID RIG FLOOR INTO MOVING POSITION. -TEST RIG EMERGENCY SHUT DOWN. GOOD TEST. 15:30 - 22:00 6.50 MOB P PRE PJSM-HAZARD ASSESSMENT-MOVE RIG OFF WELL Z-40 AND SPOT RIG OVER WELL Z-50 *MOVE CONDUCTED WITH WITNESS BY DOYON DRILLING SUPERINTENDENT AND DAY TOOLPUSHER.* 22:00 - 00:00 2.00 MOB P PRE PJSM-HAZARD ASSESSMENT-SKID RIG FLOOR INTO POSITION FOR RIG OPERATIONS AND SPUD. 3/31/2012 00:00 - 03:00 3.00 BOPSUR P INTI PJSM-HAZARD ASSESSMENT-SPOT ROCK WASHER, RIG UP LINES OFF DRILLER SIDE _ AND APPLY HEAT TO RIG FLOOR. 03:00 - 12:00 9.00 BOPSUR P INTI PJSM-HAZARD ASSESSMENT-NIPPLE UP DIVERTER SPOOL,KNIFE VALVE AND DIVERTER LINE. -SPOT MWD,MUD-MAN AND GEOLOGIST SHACKS. -HOOK UP NEW CERTIFIED BOPE HYDRAULIC LINES TO BOP STACK. -BERM SPILL CONTAINMENT AROUND ROCK-WASHER,SPOT LEPD FUEL TANK -PRE-SPUD MEETING HELD WITH RIG CREW AND PERSONNEL. **TEST H2S AND LEL SENSORS-NOV CALIBRATE AND VERIFY SYSTEM IS OPERATIONAL** 12:00 - 17:00 5.00 DRILL P INTI FINISH SKIDDING RIG FLOOR. BUILD RAMP TO SPOT TIGER-TANK -FINISH INSTALL OF 16" DIVERTER-LINE. TAKE ON MUD TO RIG PITS. -PREFORM PRE-SPUD DERRICK INSPECTION.LOAD BHA INTO PIPE SHED. 17:00 - 18:30 1.50 DRILL P INTI PICK UP 21-JOINTS 4"HWDP AND RACK IN DERRICK 18:30 - 20:00 1.50 DRILL P INTI STAGE BHA#1 AND#2 COMPONENTS TO RIG FLOOR 20:00 - 21:30 1.50 DRILL P INTI MAKE UP BHA#1 -PICK UP 1.83 DEG BEND MOTOR WITH NON PORTED FLOAT, UBHO SUB.MAKE UP BIT 21:30 - 22:30 1.00 DRILL P INTI SPOT SPERRY E-LINE UNIT, RIG UP GYRODATA AND EQUIPMENT _ 22:30 - 00:00 1.50 BOPSUR P INTI PFRFORM SURFACE DIVERTER SYSTEM ACCUMULATOR FUNCTION TEST. **HOLD TABLE TOP DIVERTER DRILL/HOLD RIG EVACUATION DRILL** 4/1/2012 00:00 - 03:30 3.50 DRILL P SURF AAR FOR RIG EVACUATION AND HAZARD AWARENESS ON DIVERTER LINE. -SECURE AREA AROUND DIVERTER LINE. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 2 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: 'X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.: DOYON 14 Spud Date!Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code ' NPT NPT Depth Phase Description of Operations (hr) (ft) 03:30 - 04:30 1.00 DRILL P SURF PJSM-HAZARD ASSESSMENT FOR DRILLING SURFACE HOLE. -FILL LINES AND WELL WITH MUD,VERIFY NO LEAKS 04:30 - 12:00 7.50 DRILL P SURF DRILL 12-1/4"SURFACE HOLE FROM 113'TO • 313' '450-GPM, PSI ON-450, PSI OFF-400 40-RPM,TRQ ON-1-2K,TRQ OFF-0 PUW-65K,SOW-65, RTW-60 ADT=3.44/AST= 1.78/ART=1.66 RUN GYRO EVERY 90-FT PER SURVEY PROGRAM. OBSERVE 15'FILL ON CONNECTION *DOWNHOLE BARRIER 8.5-PPG DRILPLEX MUD* 12:00 - 17:30 j 5.50 DRILL P SURF DRILL 12-1/4"SURFACE HOLE FROM 313'TO 585' 450-GPM, PSI ON-650, PSI OFF-550 40-RPM,WOB-15,TRQ ON-2K,TRQ OFF-1K PUW-68K,SOW-69,RTW-67 RUN GYRO EVERY 90-FT PER SURVEY PROGRAM. APPROXIMATELY 3-FT OF FILL ON BOTTOM AT CONNECTIONS **HOLD CAMP FIRE/EVAC TABLE TOP DRILL 17:30 - 18:30 1.00 DRILL P SURF CIRCULATE BOTTOMS UP, PUMP PULLING OUT OF HOLE FROM 585'TO 496'. PULL ON ELEVATORS FROM 496'TO 407' IOVERPULL AT 407'ATTEMPT TO WORK AND WIPE THROUGH MULTIPLE TIMES UNSUCCESFUL. MAKE UP TOP DRIVE AND WORK THROUGH, BACK REAM PUMPING OUT j I FROM 407'TO 316'.CONTINUE TO PULL OUT OF HOLE ON ELEVATORS FROM 316'TO SURFACE. MW IN 8.8-PPG,MW OUT 8.8-PPG 18:30 - 23:30 5.00 DRILL P SURF DIAL DOWN 9-5/8 MOTOR FROM 1.83-DEG BEND TO 1.50-DEG BEND. PICK UP BHA#2 AND RUN IN HOLE WITH 4"HWDP.TAG UP AT 1575'. 10'OF FILL ON BOTTOM.MAKE UP TOP DRIVE STAGE UP PUMPS.SHALLOW HOLE 'TEST MWD. 23:30 - 00:00 0.50 DRILL P SURF DRILL 12-1/4"SURFACE HOLE FROM 585'TO 610' .450-GPM, PSI ON-650, PSI OFF-550 40-RPM,WOB-15,TRQ ON-2K,TRQ OFF-1K PUW-82K,SOW-86,RTW-85 ADT=2.03/AST= 1.25/ART=.78 4/2/2012 00:00 - 12:00 12.00 DRILL P SURF DRILL 12-1/4"SURFACE HOLE FROM 610'TO 1,530'. 500-GPM, PSI ON-1,250, PSI OFF-1,090 40-RPM,WOB-23-25,TRQ ON-5-6K,TRQ OFF-1K -RIG DOWN GYRO AT 1,429'. ADT-8.60 AST-4.09 ART-4.51 *DOWNHOLE BARRIER 9.0-PPG DRILPLEX MUD* Printed 5/14/2012 11:20:25AM North America-ALASKA- BP Page 3 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay !Site:PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) '12:00 - 14:30 2.50 DRILL P SURF 'CONTINUE TO DRILL 12-1/4"SURFACE HOLk FROM 1.530'TO 1.764'TO ABOVE BASE OF PERMAFROST. 525-GPM, PSI ON-1,530, PSI OFF-1,230 PUW-103,SOW-98, RTW-102 60-RPM,WOB-25-30,TRQ ON-4-5K,TRQ OFF-2K 14:30 - 16:00 1.50 DRILL P SURF CIRCULATE 3-BOTTOMS UP PULLING OUT OF HOLE BACK-REAMING AT DRILLING RATE FROM 1,764'TO 293'. -MONITOR WELL,STATIC MW IN 8.8 PPG,MW OUT 8.9-PPG 16:00 - 17:00 1.00 DRILL P SURF RUN IN HOLE FROM 293'TO 1,671'WORK AND WIPE THROUGH AREA 1060'TO 1,350' RUN IN HOLE TAG BOTTOM,NO FILL HOLE LOOK GOOD ON TRIP 17:00 - 00:00 7.00 DRILL P SURF CONTINUE DRILLING 12-1/4"SURFACE HOLE FROM 1,764'TO 2,660'. 550-GPM, PSI ON-1,930, PSI OFF-1,730 60-RPM,WOB-35,TRQ ON-5-6K,TRQ OFF-2 PUW-116,SOW-106, RW-85 HYDRATES OBSERVED TO SURFACE AT 2,325' ADT-5.75 AST-66 ART-5.09 "CUTTINGS VOLUME TO BASE OF PERMAFROST= 132-YARDS.** 4/3/2012 00:00 - 06:30 6.50 DRILL P SURF CONTINUE DRILLING 12-1/4"SURFACE HOLE FROM 2,660'TO 3203'TD' 550-GPM, PSI ON-1,930,PSI OFF-1.730 60-RPM.WOB-35,TRQ ON-5-6K TRQ OFF-2 PUW-116,SOW-106. RW-85 AST-0.33 ART-3.84,ADT-4.17 "DOWNHOLE BARRIER 9.0-PPG DRILPLEX MUD* 06:30 - 07:00 0.50 DRILL P SURF CIRCULATE TO CLEAR CUTTINGS ABOVE BHA 550-GPM,PSI ON-1,930,PSI OFF-1,730 07:00 - 09:30 2.50 DRILL P SURF BACK REAM OUT OF HOLE FROM 3203'TO 1951' GPM 650,PSI-1990 09:30 - 11:00 1.50 DRILL P SURF PULL ON ELEVATORS FROM 1951'TO 832' 11:00 - 12:30 1.50 DRILL P SURF RIH IN HOLE FROM 832'TO 3203' 12:30 - 14:30 2.00 DRILL P SURF STAGE PUMPS UP TO 640 GPM,2380 PSI,100 RPM BACK REAM OUT OF HOLE FROM 3203'TO 2794' PULLING 1 STAND EVERY 20 MINUTES 14:30 - 17:00 2.50 DRILL P SURF PULL OUT OF HOLE ON ELEVATORS FORM 2794'TO 197' 17:00 - 19:30 2.50 DRILL P SURF PJSM WITH ALL HANDS,LAY DOWN SURFACE BHA 19:30 - 20:30 1.00 DRILL P SURF CLEAN AND CLEAR FLOOR OF ALL EQUIPMENT 20:30 - 00:00 3.50 DRILL P SURF RIG UP TO RUN 9 5/8"SURFACE CASING 4/4/2012 00:00 - 01:00 1.00 CASING P SURF CONTINUE TO RIG UP TO RUN 95/8"L-80 49# BTC CASING 01:00 - 02:00 1.00 CASING P SURF MAKE UP SHOE TRACK AND RUN IN HOLE, CHECK FLOATS, FLOATS HELD Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 4 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: 'X3-00XCG-C: (6,478,741.00) X3-010tH-C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:00 - 08:00 6.00 CASING P SURF CONTINUE TO RUN IN HOLE WITH 95/8"40# L-80 BTC CASING TO 3198' PUW-180K,SOW-160K 08:00 - 09:30 1.50 CASING P SURF STAGE PUMPS TO 8 BPM,WHILE 'RECIPROCATING PIPE 4 BPM,270 PSI 6 BPM,290 PSI 8 BPM,320 PSI 09:30 - 11:00 1.50 CASING P SURF LAND CASING ON LANDING RING,RIG DOWN FRANKS TOOL RIG UP CEMENT HEAD 11:00 - 13:30 2.50 CASING P SURF CONTINUE TO CIRCULATE AND CONDITION, PJSM WITH ALL HAND ON CEMENT JOB 13:30 - 17:30 4.00 CEMT P SURF PUMP 15 BBLS OF WATER AND PRESSURE TEST LINES 250 PSI LOW 3500 PSI HIGH 5 I MINUTES EACH TEST PUMP 100 BBLS OF 10.0 PPG MUDPUSH 5BPM,310 PSI,SHUT DOWN DROP BOTTOM PLUG PUMP 556 BBLS OF 11.0 PPG DEEPCRFTE LEAD CEMENT(1.91 CUFT/SX, 1640 SX)6 BPM,E3CPSI PUMP 51 BBLS OF 15.8 PPG CLASS-G TAIL CEMENT(1.16 CUFT/SX.253 SXS)5 BPM,549 - - PSI DROP TOP PLUG, PUMP 226 BBLS OF 9.4 PPG DRILL PLEX 8 BPM,650 PSI, BUMP PLUG 226 BBLS,1280 PSI, HOLD FOR 5 MINUTES BLEED OFF PRESSURE, CHECK FLOATS, RECIPROCATED PIPE ENTIRE JOB,10' STROKES,220 BBLS OF CEMENT TO SURFACE 17:30 - 22:00 4.50 CEMT P SURF RIG DOWN CEMENTING LINES AND EQUIPMENT, FLUSH STACK AND AND SURFACE EQUIPMENT,CLEAN AND CLEAR FLOOR 22:00 - 00:00 2.00 CEMT P SURF NIPPLE DOWN DIVERTER LINE AND SURFACE STACK 4/5/2012 00:00 - 02:30 2.50 BOPSUR P SURF CONTINUE TO NIPPLE DOWN SURFACE STACK 02:30 - 15:00 12.50 BOPSUR P SURF NIPPLE UP WELL HEAD AND BOPE EQUIPMENT,INSTALL ANNULUS VALVES, AND CHOKE LINE,INSTALL BLIND SHEAR RAMS 15:00 - 22:30 7.50 BOPSUR P SURF PJSM WITH ALL HANDS INSTALL 20" ANNULAR,REMOVE OLD ANNULAR,REPLACE SEALS AND INSTALL NEW ANNULAR, INSTALL CAP 22:30 - 00:00 1.50 BOPSUR P SURF NIPPLE UP RISER AND FLOW LINE,CLEAR FLOOR OF UNNEEDED TOOLS 4/6/2012 00:00 - 02:30 2.50 BOPSUR P SURF RIG UP TO TEST ROPE,HELD WELL CONTROL DRILL TOOK 6 BBLS TO FILL GAS BUSTER 02:30 - 12:30 10.00 BOPSUR P SURF TEST BOPE 250 PSI LOW,3500 PSI HIGH 5 MINUTES EACH TEST RIG DOWN TEST EQUIPMENT l4OGCC REP WAIVED WITNESS(a)1600 ON 04/05/2012 12:30 - 17:00 4.50 BOPSUR N ' RREP SURF TROUBLE SHOOT LEAKS ON BOPE, TRI-FLOW CHOKE,HCR KILL, IBOP,CHOKE LINE,ANNULAR Printed 5/14/2012 11:20:25AM North America-ALASKA- BP Page 5 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: (X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM ,Rig Release: Rig Contractor:DOYON DRILLING INC. 1 UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 17:00 - 20:00 3.00 BOPSUR N RREP SURF CHANGE MANUAL IBOP 20:00 - 00:00 4.00 BOPSUR N RREP SURF NIPPLE DOWN RISER AND FLOWLINE,MAKE UP POTATO MASHER TO ANNULAR CAP, TIGHTEN CAP, REMOVE POTATO MASHER, RUN IN TEST JOINT,CLOSE ANNULAR CHECK SEALS FOR LEAKS 4/7/2012 00:00 - 01:30 1.50 BOPSUR N RREP SURF PERFORM SEAL TEST ON ANNULAR CAP TO 1000 PSI FOR 30 MINUTES NO LEAKS 01:30 - 03:30 2.00 BOPSUR N RREP SURF PJSMI HAZARD ASSESSMENT.NIPPLE UP RISER AND D FLOWLINE 03:30 - 09:00 5.50 BOPSUR N RREP SURF INSTALL KELLY HOSE IN DERRICK,CHANGE OUT HCR KILL ON BOP STACK. LAY DOWN S-PIPE ON TOP DRIVE AND INSTALL NEW ONE. 09:00 - 09:30 0.50 BOPSUR N ' RREP SURF TEST BAG, HCR KILL VALVE AND MANUAL 1 IBOP 250 PSI 5 MIN AND 3500 PSI HIGH FOR 5 LMIN.GOOD TEST. 09:30 - 10:00 0.50 BOPSUR N RREP SURF PULL THE TEST PLUG AND INSTALL WEAR RING, BLOW DOWN CHOKE AND KILL LINE MANIFOLD. 10:00 - 15:30 5.50 BOPSUR N RREP I SURF PJSM AND HAZARD ASSESSMENT.INSTALL KELLY HOSE ON TOP DRIVE. RE-ADJUST KELLY HOSE AS TO NOT INTERFERE WITH TRAVELING ASSEMBLY.TEST KELLY HOSE TO 250 PSI FOR 5 MIN AND 4500 PSI FOR 10 MIN.REMOVE SHEAVE IN DERRICK. 15:30 - 22:00 6.50 CEMT P SURF PICKUP 87 JOINTS OF 4"DRILL PIPE,AND RACK BACK IN THE DERRICK. 22:00 - 23:00 1.00 CEMT P SURF TEST 9-5/8"CASING TO 250 PSI FOR 5 MIN AND 3500 PSI HIGH FOR 30 MIN.GOOD TEST. -LOST 20 PSI IN THE FIRST 15 MIN AND 10 PSI IN THE SECOND 15 MIN. -3.9 BBLS TO PRESSURE UP AND 3.8 BBLS BLED BACK. 23:00 - 00:00 1.00 CEMT P SURF RIG DOWN TEST EQUIPMENT,BLOW DOWN CHOKE AND KILL LINE,AND INSPECT NEW KELLY LINE CONNECTIONS. 4/8/2012 00:00 - 02:00 2.00 CEMT N RREP SURF INSTALL SHEAVE ON MULE LINE IN THE DERRICK HOUSE. 02:00 - 02:30 0.50 CEMT P SURF MOBILIZE BHA COMPONENTS TO RIG FLOOR 02:30 - 04:30 2.00 CEMT P SURF PICK UP INTERMEDIATE BHA 04:30 - 06:30 2.00 CEMT P SURF PJSM&HAZARD ASSESSMENT ON LOADING THE SOURCES. LOAD SOURCES AND CONTINUE PICKING UP BHA #3. 06:30 - 08:30 2.00 CEMT P SURF SINGLE IN THE HOLE PICKING UP REMAINING 4"DRILL PIPE TO 2804'. -D1-DRILL CREW RESPONDED IN 2:00 MIN. 08:30 - 09:00 0.50 CEMT P SURF RUN IN HOLE FROM 2804'-3064'. SPR AT 3000'MD,2978'TVD,MW 9.5 MP#1 20 SPM 140 PSI,30 SPM 230 PSI MP#2 20 SPM 150 PSI,30 SPM 210 PSI Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 6 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay I Site:PB Z Pad Rig Name/No.:DOYON 14 1 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 09:00 - 10:30 1.50 CEMT P SURF MAD PASS FROM 3064'-3185'WITH 470 GPM 1780 PSI AT 250 FPH.TAG CEMENT AT 3109' DRILL DOWN TO 3115'AND DRILL PLUGS. CON!NUE TO DRILL DOWN 3180'WITH: -PUW 125K,SOW 112K, ROT 120K -460 GPM,1730 PSI ON,1650 PSI OFF -8K WOB,TORQUE 5K ON,3K DOWNHOLE BARRIERS ARE 8.9 PPG LSND MUD AND BOPE,AND TESTED WELL HEAD AND ANNULAR VALVES. 10:30 - 13:30 3.00 CEMT P SURF PJSM. DISPLACE 9.5 PPG DRILL PLEX TO 8.9 PPG LSND AT -PUW 125K,SOW 112K, ROT 120K -450 GPM,1030 PSI, -30 RPM,3K TORQUE. 13:30 - 14:00 0.50 1 DRILL P INTI BRILL OUT SHOE AND 20'OF NEW 1 FORMATION TO 3223' -PUW 125K,SOW 112K,ROT 120K -450 GPM,1130 PSI ON,1030 PSI OFF, -WOB 10K,30 RPM,TORQUE 3K ON,2K OFF. 14:00 - 15:00 1.00 DRILL P INTI CIRCULATE BOTTOMS UP AT 450 GPM,1030 _ PSI,40 RPM,2K TQ. 15:00 - 16:30 1.50 DRILL P INTI RIG UP AND PERFORM LEAK OFF TEST. MW 8.9 PPG,3165'TVD PUMPED 2.4 BBLS BREAK OVER AT 720 PSI. 4 BLEED BACK 1.0 BBL. LOT EMW 13.2 PPG. 16:30 - 19:30 3.00 DRILL P • INTI PULL BACK INTO CASING AND SLIP AND CUT DRILLING LINE.SERVICE RIG AND INSPECT DERRICK. 19:30 - 00:00 4.50 DRILL • P INTI DRILL FROM 3223'-346Z. -PUW 125K,SOW 115K,ROT 120K -550 GPM,1500 PSI ON.1380 PSI OFF, ECD 9.58 -WOB 5K,80 RPM,TORQUE 3K ON,2K OFF. -AST 0.98,ART 0.61,ADT 1.59,JAR HRS 20.2 SPR AT 3170'MD,3136'TVD,MW 8.9 PPG MP#1 20 SPM 120 PSI,30 SPM 180 PSI MP#2 20 SPM 120 PSI,30 SPM 160 PSI 4/9/2012 00:00 - 01:30 1.50 DRILL P INTI DRILL AHEAD IN 8.75"INTERMEDIATE Hos FROM 3462'-3689' -PUW 127K,SOW 117K,ROT 120K -550 GPM,1500 PSI ON.1430 PSI OFF -WOB 5K,80 RPM,TORQUE 4K ON,2.5K OFF. SPR 3643'MD,3607'TVD,MW 8.9 PPG MP#1 20 SPM 130 PSI,30 SPM 200 PSI MP#2 20 SPM 130 PSI,30 SPM 190 PSI 01:30 - 02:30 1.00 DRILL P INTI NOTICED SWIVEL PACKING WAS LEAKING. FLOW CHECK WELL FOR 10 MIN AND CONFIRM NO FLOW. PUMP OUT OF HOLE FROM 3689'-3183'AT 357 GPM WITH 890 PSI. 02:30 - 08:00 5.50 DRILL P INTI PJSM AND HAZARD ASSESSMENT.REPLACE SWIVEL PACKING ON TOP DRIVE. 08:00 - 08:30 0.50 DRILL P INTI RUN IN HOLE FROM 3183'-3689'. Printed 5/14/2012 11:20:25AM North America-ALASKA- BP Page 7 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: 1X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site: PB Z Pad • Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:OOAM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:30 - 12:00 3.50 DRILL P INTI DRILL AHEAD FROM 3689'-4210'. -PUW 135K,SOW 125K, ROT 130K -560 GPM,1970 PSI ON,1830 PSI OFF -WOB 10K,80 RPM,TORQUE 4.5K ON,2K OFF. -AST 0.62,ART 2.58,ADT 3.2,JAR HRS 23.4 CROSSED FAULT 1 IN UG3 AT 3703'. APPROXIMATELY 205'OF THROUGH WITH NO LOSSES. SPR 4210'MD,4174'TVD,MW 8.9 PPG MP#1 20 SPM 210 PSI,30 SPM 280 PSI MP#2 20 SPM 210 PSI,30 SPM 270 PSI 12:00 - 00:00 12.00 DRILL P INTI DRILL AHEAD FROM 4210'-5607'. -PUW 151K,SOW 142K, ROT 140K -550 GPM,2460 PSI ON,2180 PSI OFF •-WOB 15K,80 RPM,TORQUE 5K ON,2K OFF. -AST 0.2,ART 7.07,ADT 7.27,JAR HRS 30.7 SPR 4583'MD,4545'TVD,MW 9.0 PPG MP#1 20 SPM 220 PSI,30 SPM 290 PSI MP#2 20 SPM 220 PSI,30 SPM 280 PSI SPR 5048'MD,5009'TVD,MW 9.0 PPG MP#1 20 SPM 240 PSI,30 SPM 310 PSI MP#2 20 SPM 230 PSI,30 SPM 310 PSI SPR 5607'MD,5563'TVD,MW 9.0 PPG MP#1 20 SPM 260 PSI,30 SPM 330 PSI MP#2 20 SPM 250 PSI,30 SPM 340 PSI D2 DRILL CREW RESPONDED IN 2 MIN 10 SEC. 4/10/2012 00:00 - 00:30 0.50 DRILL P INTI CONTINUE TO DRILL FROM 5607'-5700'. -PUW 151K,SOW 142K, ROT 140K -550 GPM,2460 PSI ON,2180 PSI OFF -WOB 15K,80 RPM,TORQUE 5K ON,2K OFF. 00:30 - 02:30 2.00 DRILL P INTI REDUCE FLOW RATE TO 430 GPM IN ORDER TO REPLACE SWAB ON MUD PUMP#1. CONTINUE TO DRILL AHEAD. -PUW 162K,SOW 142K, ROT 140K • -430 GPM,1850 PSI ON,1700 PSI OFF -WOB 15K,80 RPM,TORQUE 5K ON,2K OFF. 02:30 - 12:00 9.50 DRILL P INTI FINISH WORK ON MUD PUMP#1 CONTINUE TO DRILL FROM 5700'-6741'. 1-PUW 163K,SOW 155K,ROT 159K -500 GPM,3020 PSI ON,2780 PSI OFF -WOB 15K,80 RPM,TORQUE 5K ON,2K OFF -CAL ECD 10.16 ACT ECD 10.65 -ART 8.33,AST 0.20,ADT 8.53 STARTED ADDING SPIKE FLUID IN AT 5780' MW IN AND OUT 10.1 PPG AT 6100' SPR 6072'MD,6001'TVD,MW 10.2 PPG AT 02:00 MP#1 20 SPM 290 PSI,30 SPM 410 PSI MP#2 20 SPM 300 PSI,30 SPM 400 PSI SPR 6540'MD,6504'TVD,MW 10.2 PPG AT 10:00 MP#1 20 SPM 240 PSI,30 SPM 310 PSI MP#2 20 SPM 230 PSI,30 SPM 310 PSI Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 8 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:00 - 18:30 6.50 DRILL P INTI CONTINUE TO DRILL FROM 6741'-6927 -PUW 170K,SOW 155K,ROT 160K -500 GPM,3040 PSI ON,2720 PSI OFF -WOB 15K,80 RPM,TORQUE 5K ON,2K OFF -CAL ECD 10.63 ACT ECD 10.93 -ART 0.77,AST 3.91,ADT 4.68 -ADT FOR LAST 24 HRS 13.21 SPR 6927'MD,6914'TVD,MW 10.2 PPG AT ,18:00 MP#1 20 SPM 250 PSI,30 SPM 360 PSI MP#2 20 SPM 260 PSI,30 SPM 360 PSI 18:30 - 19:30 1.00 DRILL P INTI CIRCULATE BOTTOMS UP WHILE PREPARING FLOOR TO PULL OUT OF HOLE DUE TO BIT. HOLD PJSM WHILE CIRCULATING,MONITOR WELL FOR 15 MINUTES -GPM 500,PSI 2700 19:30 - 00:00 4.50 DRILL P INTI PULL FIRST 5 STANDS WATCHING FOR SWABBING,WELL ATTEMPTED TO SWAB AFTER FIRST 3 STANDS,WITH 15K DRAG PUMP OUT OF HOLE 1 BPM FROM 6680'TO 3472' -PUW 170K,SOW 155K -PULLED TIGHT AT 4240'WORKED AREA SEVERAL TIMES TO WIPE CLEAN 4/11/2012 00:00 - 01:00 1.00 DRILL P INTI CONTINUE TO PULL OUT OF HOLE FROM 3472'TO 3198' 01:00 - 01:30 0.50 DRILL P INTI MONITOR WELL FOR 15 MINUTES AT SHOE, MAKE UP SAFETY JOINT FOR BHA 01:30 - 03:30 2.00 DRILL P INTI CONTINUE TO PULL OUT OF HOLE FROM 3198'TO 350' 03:30 - 06:30 3.00 DRILL - P INTI PJSM ON LAYING DOWN BHA AND HANDLING OF SOURCE -LAY DOWN 305'OF INTERMEDIATE BHA 06:30 - 07:00 0.50 DRILL P INTI DOWNLOAD MWD TOOLS CLEAN UP RIG FLOOR 07:00 - 09:00 2.00 DRILL P INTI MAKE UP NEW BIT 8.75"AND BHA#4, RUN IN HOLE TO 305' 09:00 - 11:00 2.00 DRILL P INTI RUN IN HOLE WITH HWDP FROM 305'TO 937' SHALLOW HOLE TEST MWD CONTINUE TO RUN IN HOLE WITH DRILL PIPE TO 3183' 11:00 - 13:30 2.50 DRILL P INTI PJSM WITH ALL HANDS -CUT AND SLIP DRILLING LINE -SERVICE TOP DRIVE AND BLOCKS 13:30 - 16:30 3.00 DRILL P INTI RUN IN HOLE FROM 3183'TO 6927'FILLING PIPE EVERY 20 STANDS -PUW 175K,162K Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 9 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project: Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM I Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:30 - 00:00 7.50 DRILL P INTI CONTINUE TO DRILL FROM 6927'-7311' -PUW 176K,SOW 162K, ROT 166K -520 GPM,3320 PSI ON,3040 PSI OFF -WOB 15K,80 RPM,TORQUE 7K ON,3K OFF -CAL ECD 10.52 ACT ECD 10.63 -ART 1.08,AST 3.47,ADT 4.55 -ADT FOR LAST 24 HRS 4.55 PUMPING 2OBBL NUT PLUG AND SAPP SWEEPS EVERY 200' BARRIERS DISCUSSED 10.1PPG LSND MUD AND BOPE I ' SPR 6927'MD,6878'TVD,MW 10.1 PPG AT 16:30 MP#1 20 SPM 530 PSI,30 SPM 640 PSI MP#2 20 SPM 520 PSI,30 SPM 630 PSI 4/12/2012 00:00 - 12:00 12.00 DRILL P INTI DRILL AHEAD FROM 7311'-8065' -PUW 185K,SOW 165K, ROT 175K -500 GPM,3550 PSI ON,3180 PSI OFF -WOB 15K,80 RPM,TORQUE 7K ON,3K OFF -CAL ECD 10.57 ACT ECD 11.53 -ART 2.65,AST 4.69,ADT 7.34 PUMPING 2OBBL NUT PLUG AND SAPP SWEEPS EVERY 200' BARRIERS DISCUSSED 10.1PPG LSND MUD AND BOPE SPR 7356'MD,7305'ND,MW 10.1 PPG AT 01:30 MP#1 20 SPM 260 PSI,30 SPM 360 PSI MP#2 20 SPM 270 PSI,30 SPM 370 PSI ,SPR 7942'MD,7811'TVD,MW 10.1 PPG AT 10:30 MP#1 20 SPM 300 PSI,30 SPM 390 PSI MP#2 20 SPM 300 PSI,30 SPM 390 PSI 12:00 00:00 12.00 DRILL P INTI DRILL AHEAD FROM 8065'- 32' 1-PUW 198K,SOW 170K, ROT 180K -500 GPM,3650 PSI ON,3420 PSI OFF -WOB 15K,80 RPM,TORQUE 7K ON,4K OFF -CAL ECD 10.60 ACT ECD 10.97 -ART 2.61,AST 5.84,ADT 8.45 -TOTAL ADT FOR 24HRS 15.79 SPR 8320'MD,8131'TVD,MW 10.1 PPG AT 14:00 MP#1 20 SPM 300 PSI,30 SPM 420 PSI MP#2 20 SPM 310 PSI,30 SPM 420 PSI 4/13/2012 00:00 - 06:00 6.00 DRILL P INTI DRILL AHEAD FROM 8632'TO 8995'. -PUW 202K,SOW 171K,ROT 186K. -500 GPM,3730 PSI ON,3580 PSI OFF. -WOB 8K,80 RPM,TORQUE 7K ON,4K OFF. -CAL ECD 10.63 ACT ECD 10.95. -ART 2.16,AST 2.34,ADT 4.50. SPR 8690'MD,8430'ND,MW 10.1 PPG AT 00:30 MP#1 20 SPM 330 PSI,30 SPM 440 PSI MP#2 20 SPM 360 PSI,30 SPM 430 PSI Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 10 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: 'X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 08:30 2.50 DRILL P INTI CIRCULATE 3 BOTTOMS UP -GPM=500, PSI=3560. -RPM=80,TORQ.=4K. _I-ROTATE AND RECIPROCATE PIPE 30 FEET. 08:30 - 14:30 6.00 DRILL P ' INT1 'BACK REAM OUT OF THE HOLE FROM 8995' TO 5940'. -PUW=200K,SOW= 175K, ROT=186K. -GPM=500, PSI=3560. -RPM=80,TORQ. =4K. MADD PASS FROM 6928'TO 6780'. 14:30 15.00 0.50 DRILL P ' INT1 CIRCULATE BOTTOMS UP -GPM=500, PSI=2900. -RPM=80,TORQ. =2K. -PUW=170K,SOW=150K. 15:00 - 16:30 1.50 DRILL P INTI FLOW CHECK WELL FOR 10 MINUTES,WELL STATIC.RUN IN THE HOLE FROM 5940'TO 8995'. FILL EVERY 20 STANDS. 16:30 - 17:00 0.50 DRILL P 1 INT1 DRILL AHEAD FROM 8995'TO 9000'. 1 -PUW 205K,SOW 174K,ROT 185K. I-500 GPM,3650 PSI ON,3500 PSI OFF. -WOB 10K,80 RPM,TORQUE 5K ON,4K OFF. -ART 0.04,AST 0.00 ADT 0.04. -TOTAL ADT FOR 24 HRS.4.54 SPR 8991'MD,8699'ND,MW 10.2 PPG AT 17:05 MP#1 20 SPM 270 PSI,30 SPM 400 PSI MP#2 20 SPM 260 PSI,30 SPM 410 PSI 17:00 - 19:00 2.00 DRILL P INTI CIRCULATE 3 BOTTOMS UP -GPM=500,PSI=3210. -RPM=80,TORQ.=4K. -PUW=170K,SOW=150K,ROT=186K. -MUD WEIGHT IN=MUD WEIGHT OUT AT 10.2 PPG. 19:00 - 00:00 5.00 DRILL P INTI FLOW CHECK WELL FOR 10 MINUTES,WELL STATIC. PUMP OUT OF THE HOLE 1 BPM FROM 9000'TO 6400'.PULL OUT OF THE HOLE ON ELEVATORS FROM 6400'TO 5531'. 4/14/2012 00:00 - 02:00 2.00 DRILL P INTI CONTINUE TO PULL OUT OF HOLE FROM 5531'TO 3183'. -PUW 135K,SOW 115K. 02:00 - 03:00 1.00 DRILL P INTI CIRCULATE BOTTOMS UP AT SHOE. -500 GPM,1820 PSI. -MONITOR WELL FOR 15 MIN,WELL STATIC. 03:00 - 06:00 3.00 DRILL P INTI CONTINUE TO PULL OUT OF HOLE FROM 3183'TO 968'. -MONITOR WELL,LAY DOWN BHA. 06:00 - 10:00 4.00 DRILL P INTI LAY DOWN ALL HWDP AND INTERMEDIATE BHA. 10:00 - 10:30 0.50 DRILL P INTI RIG UP STACK WASHER AND FLUSH STACK. 10:30 - 12:00 1.50 DRILL P INTI CLEAN AND CLEAR FLOOR,SUCK OUT STACK AND PULL WEAR RING. 12:00 - 15:00 3.00 DRILL P INTI CHANGE OUT UPPER RAMS TO 7". 15:00 - 17:00 2.00 DRILL P INTIRIG UP AND TEST 7"RAMS. _ -250 PSI LOW,3500 PSI HIGH. -5 MINUTES EACH TEST. 17:00 - 19:30 2.50 DRILL P INTI MAKE DUMMY RUN WITH HANGER,RIG UP TO RUN 7"TCII CASING. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 11 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type:DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad I — Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 19:30 - 00:00 4.50 CASING P j INTI PJSM WITH ALL PERSONNEL. ,-RUN IN HOLE WITH 7"26#L-80 TCII CASING TO 2140'. -AVERAGE MAKE UP TORQUE 10,100 FT/LBS. 4/15/2012 00:00 - 02:00 2.00 CASING P INTI RUN IN HOLE WITH 7"26#L-80 TCII CASING FROM 2140'TO 3198'. 02:00 - 02:30 0.50 CASING P INTI CIRCULATE 100BBLS AT 3198'. -STAGING PUMPS TO 7 BBLS PER MINUTE, 650 PSI. 02:30 - 04:30 2.00 CASING P INT1RUN IN HOLE WITH 7"26#L-80 TCII CASING 1 FROM 3198'TO 4343'. -CIRCULATE EVERY 5TH JOINT, BRINGING PUMPS UP TO 5 BPM,,550 PSI. 04:30 - 10:00 5.50 CASING P INTI RUN IN HOLE WITH 7"26#L-80 TCII CASING FROM 4343'TO 7199'. -CIRCULATE EVERY 10TH JOINT,FILL EVERY JOINT. 10:00 - 11:00 1.00 CASING P INTI RUN IN HOLE WITH 7"26#L-80 TCII CASING FROM 7199'TO 7408'. -CIRCULATE 5 BPM WITH 730 PSI. -PUMP BOTTOMS UP,202 BBLS. -SPILL DRILL RESPONSE TIME=105 -SECONDS. 11:00 - 14:00 3.00 CASING P INTI _RUN IN HOLE WITH 7"26#L-80 TCII CASING FROM 7408'TO 8962'. -CIRCULATE EVERY 10TH JOINT,FILL EVERY JOINT. 14:00 - 17:30 3.50 CASING P INTI MAKE UP LANDING JOINT AND CONTINUE RUN IN THE HOLE. -4 BPM,890 PSI. -PACK OFF ISSUES,WORK PIPE 310K TO 75K WITH PUMPS OFF UNTIL PIPE BROKE FREE. SHAKERS SAW A LARGE INCREASE IN CUTTINGS DURING BOTTOMS UP. WORK PIPE UNTIL PRESSURE AND WEIGHT STABILIZE AT 4 BPM,830 PSI. 17:30 - 21:00 3.50 CASING P INTI LAY DOWN FILL UP TOOL AND MAKE UP CEMENT HEAD. CONTINUE TO WORK PIPE. -STAGE PUMPS UP 7 BPM,850 PSI. -SPILL DRILL RESPONSE TIME= 130 SECONDS. 21:00 - 22:30 1.50 CEMT P INTI TEST SCHLUMBERGER CEMENT LINES 350 PSI LOW AND 3500 PSI HIGH FOR 5 MINUTES EACH. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 12 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Code NPT NPT Depth Phase Description of Operations (hr) (ft) • 22:30 - 00:00 1.50 CEMT P INTI PUMP 30 BBLS OF 10.5 PPG MUDPUSH 114 BPM. -4BPM 580 PSI SHUT DOWN AND ALIGN CEMENT HEAD TO DROP BOTTOM PLUG. MIX AND PUMP 152 BBLS OF 11.0 PPG SLURRY 6 BPM. -483 SXS,1.86 CUFT/SX -6BPM,1008 PSI MIX AND PUMP 38 BBLS OF 15.8 PPG TAIL SLURRY AT 4 BPM. -199 SXS,1.16 CUFT/SX -4 BPM,510 PSI SHUT DOWN AND ALIGN CEMENT HEAD TO DROP TOP PLUG. PUMP 10 BBLS OF FRESH WATER. CHASE WITH 330 BBLS OF 10.1 PPG LSND MUD.PLUG BUMPED AT 3273 STROKES,330 BBLS. -AT 2600 STROKES SLOWED RATE TO 3.5 'BPM PRESSURE AT 1110 PSI -AT 3000 STROKES SLOWED RATE TO 2 BPM, PRESSURE 1150 PSI -AT 3026 SLOWED TO 1 BPM DUE TO LIFT STALL,PUMPED AT 1 BPM,1008 PSI UNTIL BUMP PRESSURE UP TO 1500 PSI AND HOLD FOR 5 MINUTES.BLEED OFF CHECK FLOATS, CEMENT IN PLACE AT 23:35.ESTIMATED TOP .OF CEMENT AT 3842' 12 BBLS LOST DURING ENTIRE CIRCULATING _AND CEMENT JOB 4/16/2012 00:00 - 01:00 1.00 CASING P INTI TEST CASING TO 250 PSI LOW FOR 5 MINUTES AND 3500 PSI HIGH FOR 30 MINUTES.TEST PASSED. BLOW DOWN LINES AND RIG DOWN EQUIPMENT. WTL MIKE SCHULTZ APPROVED TEST. 01:00 - 02:00 1.00 WHSUR P INTI CLOSE ANNULAR AND INJECT 5 BBLS OF LSND DOWN THE 9-5/8"X 7"ANNULUS. -1200 PSI TO BREAK OVER, INJECTED AT 1130 PSI AT 3 BPM 02:00 - 05:30 3.50 WHSUR P INTI RIG DOWN CEMENT HEAD,LAY DOWN LANDING JOINT, MAKE UP LOWER TEST PLUG ON SAFETY JOINT. INSTALL AND TEST 7"PACKOFF AND TEST. -300 PSI LOW 15 MIN,5000 PSI HIGH 30 MIN. -CLEAN AND CLEAR RIG FLOOR OF CASING TOOLS. 05:30 - 08:00 2.50 CEMT P INTI INSTALL WEAR BUSHING AND MOBILZE BHA ASSEMBLY#5 TO THE RIG FLOOR. -INJECT DOWN THE 9-5/8"X 7"ANNULUS. INITIAL PUMPING AT 3 BPM BROKE OVER WITH 1280 PSI. CONTINUE PUMPING 2 BPM EVERY 30 MINUTES WITH 1070 PSI BREAK OVER. 08:00 - 11:30 3.50 CEMT P INTI PJSM ON MAKING UP BHA. MAKE UP BHA#5 AND INSTALL SOURCE Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 13 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay , Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:30 - 18:00 6.50 CEMT P INTI RUN IN THE HOLE ON 4"DRILL PIPE FROM 249'TO 3056',PICKING UP SfNGLES FROM THE PIPESHED,FILLING EVERY 20 STANDS. INJECT DOWN THE 9-5/8"X 7"ANNULUS EVERY HOUR. -D1 KICK DRILL RESPONSE TIME=130 SECONDS. 18:00 - 19:30 1.50 CEMT P INTI SLIP AND CUT DRILLING LINE. 19:30 - 20:00 0.50 CEMT P — INTI 'SERVICE TOP DRIVE AND DRAWWORKS. 20:00 - 22:00 2.00 CEMT P INTI PULL WEAR RING AND INSTALL TEST PLUG WITH STRING HANGING OFF ON TEST PLUG. PUW=98K,SOW=95K. 22:00 - 00:00 2.00 WHSUR P INTI CHANGE OUT 7"TO 3-1/2"X 6"RAMS. -SIMOPS-LITTLE RED FREEZE PROTECT,66 BBLS OF DEAD CRUDE,2 BPM,1300 PSI. -PRIOR TO FREEZE PROTECT INJECT 5 BBLS OF10.1 PPGLSNDDOWNTHE9-5/8"X7" ,ANNULUS. -TOTAL VOLUME INJECTED DOWN 9-5/8"X 7" ANNULUS FOR DAY=26.5 BBLS. 4/17/2012 00:00 - 01:00 1.00 WHSUR P INTI CONTINUE TO FREEZE PROTECT. -TEST LINES TO 500 PSI LOW,3500 PSI HIGH FOR 5 MINUTES EACH.BEGIN FREEZE PROTECT 9-5/8"X 7"ANNULUS. -ICP PUMPING 2 BPM WITH 1300 PSI. -CRUDE TEMPERATURE=90 DEGREES. -FCP 1600 PSI ON CRUDE INJECTION. -TOTAL BBLS PUMPED=66. 01:00 - 01:30 0.50 WHSUR P INTI RIG DOWN LITTLE RED AND SUCK BACK LINES. 01:30 - 03:30 2.00 BOPSUR P INTI 'PJSM.CHANGE UPPER RAMS FROM 7"TO 3-1/2"X 6"VARIABLES. 03:30 - 04:30 1.00 BOPSUR P INTI INSTALL 4"TEST JOINT AND FILL UP BOP STACK WITH WATER.CHOKE TOOK 6.1 BBLS TO FILL.BEGAN TEST AND TEST PLUG SEAL LEAKED. -BOP DRILL 04:30 - 05:30 1.00 BOPSUR P INTI RIG DOWN TESTING EQUIPMENT AND RIG UP TO TO PULL TEST PLUG TO SURFACE. 05:30 - 07:00 1.50 BOPSUR N SFAL INTI LAY DOWN TEST PLUG.CLEAN RIG FLOOR, MAINTENANCE ON MUD PUMPS,TAKE ON NEW MUD TO THE PITS WHILE WAITING FOR NEW TEST PLUG. 07:00 - 09:30 2.50 BOPSUR N SFAL INTI INSTALL NEW TEST PLUG AND LAND IN THE 'WELL HEAD.TEST SEAL,SEAL FAILED. PULL TEST PLUG TO SURFACE AND CHECK SEALS. 09:30 10:30 1.00 BOPSUR N SFAL INTI FLUSH AND SUCK OUT THE BOP STACK. 10:30 - 11:00 0.50 BOPSUR N SFAL INTI CHANGE OUT CROSSOVERS UNDERNEATH TEST PLUG.RUN TEST PLUG WITH SHORTER CROSSOVERS. TEST PLUG SEALS HOLDING. '11:00 - 12:00 1.00 BOPSUR P INTI RIG UP AND TEST PLUG SEALS TO 2500 PSI. TEST PASSED. RIG DOWN TEST EQUIPMENT AND SUCK OUT BOP STACK. 112:00 - 15:00 3.00 BOPSUR N RREP INT1 CHANGE OUT HCR KILL VALVE#22. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 14 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT ' NPT Depth Phase Description of Operations (hr) (ft) 15:00 - 21:00 6.00 BOPSUR P INTI TEST BOPE AS PER PROCEDURE.250 PSI LOW.3500 PSI HIGH FOR 5 MINUTES. -CHARTED-SEE ATTACHMENT. -AOGCC JEFF JONES-WAIVED WITNESS. -D4 ACCUMULATOR DRILL. 21:00 - 23:00 2.00 BOPSUR P INTI RIG DOWN TEST EQUIPMENT. BLOW DOWN CHOKE AND KILL LINES. PULL TEST PLUG AND INSTALL WEAR RING WITH STRING ,ATTACHED TO PLUG. 23:00 - 00:00 1.00 DRILL P INTI RUN IN THE HOLE ON 4"DRILL PIPE WITH _BHA#5 FROM 2865'TQ4920' FILL EVERY 20 STANDS. 4/18/2012 00:00 - 03:00 ' 3.00 DRILL P INTI 'RUN IN THE HOLE ON 4"DRILL PIPE WITH BHA#5 FROM 4920'TO 8840'. -FILL EVERY 20 STANDS. _ 03:00 - 03:30 0.50 DRILL P INTI RUN IN THE HOLE FROM 8840'TO 8901'. TAG ,CFMFNT AT 8901' -211 GPM,1830 PSI. -30 RPM,4K TORQUE. -UP WT. 175K/DOWN WT. 151K/ROT.WT. 165K. SPR 8858'MD,8663'TVD,MW 10.2 PPG MP#1 20 SPM 570 PSI,30 SPM 800 PSI MP#2 20 SPM 550 PSI,30 SPM 840 PSI 03:30 - 04:30 1.00 DRILL P INTI _DRILL CEMENT SHOE TRACK FROM 8901'TO 8975'AT 4 BPM WITH 1830 PSI. ROTATING AT • i.. 30 RPM WITH 6K TORQUE. UP WT. 185K/ DOWN WT. 151K/ROT.WT. 155K. 04:30 - 05:30 1.00 DRILL P INTI CIRCULATE BOTTOMS UP. PREP MUD PITS FOR UPCOMING DISPLACEMENT TO 8.6 PPG POWER PRO SF MUD. 05:30 - 06:00 0.50 DRILL P • INTI PJSM ON DISPLACEMENT TO 8.6 PPG POWER PRO SF MUD. 06:00 - 06:30 0.50 DRILL P INTI SHUT DOWN PUMPS,SUCK OUT PITS OF OLD MUD AND LINE UP ON 10.2 PPG HIGH VIS. 06:30 - 08:00 1.50 DRILL N RREP INTI TROUBLESHOOT CONVEYOR#2,BLOW DOWN TOP DRIVE 08:00 - 10:00 2.00 DRILL P INTI DISPLACE.WELI RORF TO 8 6 PPS,POWER PRO SF MUD. -PUMP 40 BBLS 10.2 PPG HIGH VIS SWEEP. -PUMP 30 BBLS OF WATER. -CHASE WITH 8.6 PPG POWER PRO SF MUD, SHUT DOWN ONCE MUD IS BACK TO SURFACE. ICP= 1910 PSI,250 GPM; FCP= 1320 PSI,250 GPM. SPR 8925'MD,8636'TVD,MW 8.6 PPG MP#1 20 SPM 330 PSI,30 SPM 480 PSI MP#2 20 SPM 310 PSI,30 SPM 470 PSI 10:00 - 15:00 5.00 DRILL P INTI RACK BACK ONE STAND OF DRILL PIPE AND BLOW DOWN TOP DRIVE. CLEAN SURFACE EQUIPMENT AND PITS.BRING ON NEW 8.6_ PPQ POW PRO MUD. Printed 5/14/2012 11:20:25AM iNorth America -ALASKA- BP Page 15 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task ' Code NPT NPT Depth Phase Description of Operations (hr) (ft) 15:00 - 16:30 1.50 DRILL P INTI DRILL OUT REMAINING SHOE TRACK AND 20' ZSF NEW HOLE. GPM=230,PSI ON= 1220, PSI OFF= 1200. -RPM=30,TORQ ON=3K,TORQ OFF=3K. -UP WT. 175K/DOWN WT. 150K/ROT.WT. 165K. -WOB=8K. 16:30 - 17:30 1.00 DRILL P INTI CIRCULATE BOTTOMS UP. -GPM=230, PSI=1200. -RPM=30,TORQ=3K. 17:30 - 19:00 1.50 DRILL P INTI RIG UP AND PERFORM FIT TO 11.0 PPG.SEE ATTACHED CHARTS. 19:00 - 00:00 5.00 DRILL P PROD1 DIRECTIONALY DRILL AHEAD IN 6-1/8"HOLE FROM 9020'TO 9100'. -GPM=230,PSI ON=1350,PSI OFF=1230. -UP WT. 175K/DOWN WT. 163K. WOB=8K. 4/19/2012 00:00 - 07:30 7.50 DRILL P PROD1 iDIRECTIONALLYDRILLAHEADIN6-1/8"HOLE FROM 9100'-9198'. -GPM=250, PSI ON= 1600, PSI OFF= 1430. -UP WT.180K/DOWN WT. 163K. -WOB=5K. 07:30 - 08:30 1.00 DRILL P PROD1 10 MINUTE FLOW CHECK,WELL STATIC. PULL OUT OF THE HOLE FROM 9198'TO 8935'. MW IN=8.6-PPG MW OUT=8.6-PPG. -BLOW DOWN TOP DRIVE. -CIRCULATE OVER THE HOLE AND MONITOR - WELL. 08:30 - 09:00 0.50 DRILL P PROD1 RUN IN THE HOLE FROM 8935'TO 9198'.MW IN=8.6-PPG MW OUT=8.6-PPG. '09:00 - 12:00 3.00 DRILL P PROD1 DIRECTIONALLY DRILL AHEAD IN 6-1/8"HOLE FROM 9198'-9245'. -GPM=250,PSI ON=1640,PSI OFF=1430. -UP WT. 185K/DOWN WT. 163K. WOB=5K. AST=8.2 HRS.ADT=8.2 HRS.ART=0 HRS. JARS=55.8 HRS.BIT=11.89 HRS. 12:00 - 00:00 12.00 DRILL P PROD1 DIRECTIONALLY DRILL AHEAD IN 6-1/8"HOLE _FROM 9245'-9679'. -GPM=230,PSI ON=1510,PSI OFF=1380. -UPWT. 183K/DOWNWT. 162K. -WOB=10K. SPR 9305'MD,8915'TVD,MW 8.6 PPG MP#1 20 SPM 420 PSI,30 SPM 590 PSI MP#2 20 SPM 410 PSI,30 SPM 580 PSI AST=9.18 HRS.ADT=9.18 HRS.ART=0 HRS.JARS=64.98 HRS.BIT=21.07 HRS. 'DOWNHOLE BARRIERS-8.6-PPG POWER PRO MUD. Printed 5/14/2012 11:20:25AM • North America -ALASKA- BP Page 16 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 3/30/2012 End Date: X3-O0XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:OOAM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 4/20/2012 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONALLY DRILL AHEAD IN 6-1/8"HOLE FROM 9679'-10087'. ROT AT 40 RPM WITH 3K TQ. -GPM=250, PSI ON= 1790, PSI OFF= 1570. -UP WT. 176K/DOWN WT. 155K/ROT WT. 170K -WOB=8K. SPR 9776'MD,9012'TVD,MW 8.6 PPG MP#1 20 SPM 460 PSI,30 SPM 610 PSI MP#2 20 SPM 460 PSI,30 SPM 610 PSI AST=4.55 HRS.ADT=6.67 HRS.ART=2.12 HRS.JARS=71.6 HRS. 12-HR METAL SHAVINGS=0.25 LBS PUMPED A SWEEP AT 10000'WITH A 20-25% INCREASE IN CUTTINGS. DOWNHOLE BARRIERS-8.6-PPG POWER PRO MUD. ESMAILKA'S CREW HELD A KICK WHILE DRILLING DRILL,CRT 81 SEC. 12:00 - 00:00 12.00 DRILL P PROD1 DIRECTIONALLY DRILL AHEAD IN 6-1/8"HOLE FROM.10.087'-10650'. -ROT AT 40 RPM WITH 3K TQ. -GPM=250, PSI ON= 1760, PSI OFF= 1560. UP WT. 182K/DOWN WT. 153K/ROT WT. 169K -WOB=8K. SPR 10334'MD,8910'TVD,MW 8.6 PPG MP#1 20 SPM 490 PSI,30 SPM 620 PSI MP#2 20 SPM 460 PSI,30 SPM 630 PSI AST=6.82 HRS.ADT=9.2 HRS.ART=2.38 HRS.JARS=80.8 HRS. PUMPED A SWEEP AT 10500'WITH A 25-30% INCREASE IN CUTTINGS. DOWNHOLE BARRIERS-8.6-PPG POWER PRO MUD. 4/21/2012 00:00 - 11:00 11.00 DRILL P PROD1 DIRECTIONALLY DRILL AHEAD IN 6-1/8"HOLE FROM 10650'TO 11070'. • TROT AT 40 RPM,5K TORQUE ON,3K TORQUE OFF. -GPM=250, PSI ON=2040, PSI OFF= 1720. -UP WT. 185K/DOWN WT. 157K/ROT WT. 169K WOB=10K. SPR 11062'MD,8981'TVD,MW 8.6 PPG MP#1 20 SPM 580 PSI,30 SPM 740 PSI MP#2 20 SPM 570 PSI,30 SPM 750 PSI AST=2.75 HRS.ADT=6.01 HRS.ART=3.26 HRS.JARS=86.9 HRS. PUMP A SWEEP AT 10750'WITH A 25-30% INCREASE IN CUTTINGS. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 17 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth ' Phase Description of Operations (hr) (ft) 11:00 - 12:00 1.00 DRILL P PROD1 10 MINUTE FLOW CHECK,WELL STATIC. PUMP HI VIS SWEEP,CIRCULATE 250 GPM WITH 1740 PSI, ROTATE 60 RPM WITH 3K TORQ. PUMP 121 BBLS TO PUSH SWEEP OUT OF THE DRILL STRING. 12:00 - 23:30 11.50 DRILL P PROD1 SET DEPTH WITH MWD AND BEGIN MADD PASS FROM 11070'TO 9100'. -60 RPM,3K TORQ. -250 GPM,1700 PSI. PULL OUT OF THE HOLE FROM 9100'TO 8935'.FLOW CHECK,WELL STATIC. 23:30 - 00:00 0.50 DRILL P PROD1 DROP 1.760"OPENING BALL,PUMP IT DOWN AT 2 BPM. PRESSURE UP TO 1000 PSI AND HOLD FOR 30 SECONDS,PRESSURE UP AND SHEAR AT 2100 PSI. CIRCULATE BOTTOMS UP. 10 BPM,1270 PSI. -80 RPM. 4/22/2012 00:00 - 00:30 0.50 DRILL P PROD1 CONTINUE TO CIRCULATE A BOTTOMS UP AT 10 BPM WITH 1,270 PSI ROTATE AND RECIPROCATE AT 80 RPM,3K TORQUE. 00:30 - 01:00 0.50 _ DRILL P PROD1 DROP WELL COMMANDER ACTIVATION BALL 1.76"-OD. -PUMP BALL TO SEAT AT 2-BPM. -PRESSURE TO 2,100-PSI AND SHIFTWELL COMMANDER CLOSED. -CONFIRM COMMUNICATION WITH THE MWD 01:00 - 01:30 0.50 DRILL P PROD1 FLOW CHECK THE WELL,STATIC -PREPARE TO RUN IN THE HOLE. MW IN 8.6-PPG,MW OUT 8.6-PPG 01:30 - 02:00 0.50 DRILL P PROD1 SERVICE AND VISUALLY INSPECT THE DRAWWORKS AND TOP DRIVE. • -TURN KELLY HOSE ON THE TOP DRIVE FOR BETTER POSITION IN DERRICK. 02:00 - 04:00 2.00 DRILL P PROD1 TRIP IN THE HOLE FROM 8,935'TO 10,988'. -STAGE UP PUMP TO 250-GPM,1,750-PSI WASH LAST STAND TO TD AT 11,070'WITH 80-RPM,4K TORQUE. -NO FILL ON BOTTOM 04:00 - 05:30 1.50 DRILL P PROD1 PUMP HI-VIS SWEEP AT 250-GPM, 1,750-PSI ROTATE 80-RPM, 4K-TORQUE. -CIRCULATE UNTIL HOLE IS CLEAN.2 BOTTOMS UP TOTAL. -PREPARE THE PITS FOR DISPLACEMENT TO OBM. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 18 of 18 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: DRL-ONSHORE(DON) Start Date:3/30/2012 End Date: X3-00XCG-C: (6,478,741.00) X3-010GH-C: Project: Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To ' Hrs Task Code I NPT NPT Depth Phase Description of Operations (hr) (ft) 05:30 - 08:30 3.00 DRILL P PROD1 PJSM, DISPLACING WELL FROM POWER PRO MUD TO 8.5-PPG RHELIANT OBM. -PUMP 40-BBLS 8.7-PPG KCL SPACER. -PUMP 40-BBLS 9.8-PPG OBM SPACER. -CHASE WITH 8.5-PPG OBM FROM PITS. SHUT DOWN WHEN 8.5-PPG OBM IS TO SURFACE. RACK BACK ONE STAND AND BLOW DOWN TOP DRIVE. ICP= 1,960 PSI, FCP=2,510. 1-BBUHR STATIC LOSS RATE ONCE DISPLACED TO OBM MW IN 8.5-PPG,MW OUT 8.5-PPG -SPR'S 10,977' 8960'TVD MP 1,2-BPM=310-PSI 3-BPM=780-PSI MP 2,2-BPM=300-PSI 3-BPM=640-PSI 08:30 - 09:30 1.00 DRILL P PROD1 10 MINUTE FLOW CHECK,WELL TAKING 1-BBUHR STATIC LOSS. -CLEAN SURFACE EQUIPMENT OF WATER BASED MUD. -OUT OF CRITICAL PATH,CHANGE OUT STABBING BOARD MOTOR. 09:30 - 11:00 1.50 DRILL P PROD1 CIRCULATE 2 BOTTOMS UP. -250 GPM,2430 PSI. -80 RPM,4K TORO. -PUW-190K,SOW-154K,ROT-170K. 11:00 - 14:00 3.00 DRILL PROD1 FLOW CHECK,WELL STATIC. BLOW DOWN TOP DRIVE. -PULL OUT OF THE HOLE ON ELEVATORS FROM 10,998'TO 8,935'. -25K OVERPULL 9,340'WORK AND WIPE THROUGH SAME.NO ISSUE THEREAFTER. 'MW IN 8.5-PPG,MW OUT 8.5-PPG 14:00 - 15:30 1.50 DRILL P PROD1 DROP 1.76"-OD WELL COMMANDER BALL, PUMP TO SEAT, PRESSURE TO 1,000-PSI AND HOLD FOR 30 SECONDS. PRESSURE TO 2,400-PSI TO SHEAR OPEN WELL COMMANDER VALVE. -CIRCULATE BOTTOMS 470-GPM,3,180-PSI. -DROP 1.76"BALL.VERIFICATION WELL COMMANDER SHIFTED CLOSED AT 2,400-PSI. BLOW DOWN TOP DRIVE. MONITOR WELL FOR 10 MINUTES, 1/2-BBL/HR STATIC LOSS RATE. 15:30 - 19:30 4.00 DRILL P PROD1 PULL OUT OF THE HOLE ON ELEVATORS WITH 4"DRILL PIPE FROM 8,935'TO 250'. TRIP GOOD NO ISSUES. 19:30 - 22:30 3.00 DRILL P PROD1 10 MINUTE FLOW CHECK PRIOR TO PULLING BHA,1-BBUHR STATIC LOSS RATE. -LAY DOWN BHA JARS,WELL COMMANDER CIRCULATION SUB AND NMFC. -REMOVE SOURCE FROM BHA AND CONTAIN SAME. -LAY DOWN MWD,ADN4 AND REMAINDER 'OF BHA. Printed 5/14/2012 11:20:25AM North America -ALASKA- BP Page 1 of 6 Operation Summary Report Common Well Name:Z-50 AFE No Event Type:COM-ONSHORE(CON) Start Date:4/22/2012 End Date: X3-OOXCG-C:(3,184,597.00) X3-010GI+C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task I Code NPT NPT Depth Phase Description of Operations (hr) (ft) 4/22/2012 22:30 - 23:00 0.50 CASING ' P 1 RUNPRD CLEAN AND CLEAR RIG FLOOR OF TOOLS NOT NEEDED FOR UPCOMING OPERATIONS. 23:00 - 00:00 1.00 CASING P RUNPRD REMOVE ELEVATORS AND ELEVATOR LINKS. MOBILIZE COMPENSATOR AND CASING TOOLS TO THE RIG FLOOR. 4/23/2012 00:00 - 03:00 3.00 CASING P RUNPRD CONTINUE TO RIG UP TOOLS AND EQUIPMENT FOR RUNNING 4-1/2"12.6#13CR VAM TOP LINER. DOUBLE CHECK RUN ORDER IN THE PIPE SHED. MOBILIZE PUP JOINTS TO RIG FLOOR. 03:00 - 10:00 7.00 CASING P RUNPRD RUN IN THE HOLE WITH 4-1/2"�12.6#,,13CR, VAM TOP LINER AS PER LINER RUNNING TALLY. UTILIZE BAKER LOK ALL CONNECTIONS BELOW THE BOTTOM SWELL PACKER AND JET LUBE SEAL GUARD TO ALL OTHER CONNECTIONS. TORQUE TURN ALL CONNECTIONS TO 4400 FT/LBS. FILL PIPE AND CHECK FLOAT EQUIPMENT, FLOATS I HELD. 10:00 - 12:00 I 2.00 CASING P RUNPRD CHANGE OUT ELEVATOR LINKS AND ELEVATORS. RIG DOWN LINER TOOLS AND EQUIPMENT. 12:00 - 12:30 0.50 CASING P RUNPRD MAKE UP ONE STAND OF 4"DRILL PIPE AND , BEGIN CIRCULATING AT 84 GPM WITH 240 PSI WHILE ALLOWING PAL-MIX TO SET UP IN THE PACKER/HANGER ASSEMBLY. 12:30 - 13:00 0.50 CASING P RUNPRD CIRCULATE 1.5 LINER VOLUME. -84 GPM,240 PSI. MAX 100 GPM=310 PSI. -PUW=80K,SOW=78K. 13:00 - 18:30 5.50 CASING P RUNPRD RUN IN THE HOLE FROM 2279'TO 8910'. -INSTALL STRIPPING RUBBER. 18:30 - 20:00 1.50 CASING P RUNPRD CIRCULATE ANNULAR VOLUME,205 BBLS. -104 GPM,390 PSL — 20:00 - 00:00 4.00 CASING P ' RUNPRD RUN IN THE HOLE WITH 4-1/2"LINER FROM 8910'TO 9850'. TAG UP ON TIGHT SPOT AT 9742'. ATTEMPT TO WORK UP AND DOWN WITH NO SUCCESS. ESTABLISH CIRCULATION AT 1 BPM WITH 280 PSI AND WORK PIPE. CONTINUE TO WORK DOWN WITH AND WITHOUT PUMPING ON IT. -1.5 BPM=340 PSI. 2 BPM=400 PSI. -PUW=178K,SOW=160K TOTAL LOSSES FOR DAY=23 BBLS. 4/24/2012 00:00 - 04:00 4.00 CASING P RUNPRD CONTINUE TO RUN IN THE HOLE FROM 9.850' TO 11.070'. ENCOUNTERING TIGHT SPOTS AT THE FOLLOWING DEPTHS: 10,180'-10,210'/10,330'-10,360'/10,815'- 10,840' WORKED THROUGH AREAS PUMPING AND RECIPROCATING THE PIPE. PUMPING AT 1-BPM,340-PSI AND 1.5-BPM, 460-PSI UNTIL PRESSURES STABILIZED. -PUW 180K, 225K/DWT 75K-150K. -TAG TD ON DEPTH AT 11,070'-MD _- PICK UP 2'TO SET LINER QN DEPTH AT 11,068-MD'. Printed 5/14/2012 11:20:59AM North America -ALASKA- BP Page 2 of 6 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: COM-ONSHORE(CON) Start Date:4/22/2012 End Date: (X3-00XCG-C: (3,184,597.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 05:00 1.00 CASING P RUNPRD PJSM,DROP 1.75"-OD BALL TO SET THE HANGER. PUMP DOWN BALL 1-BPM, INCREASE PRESSURE TO 2,625-PSI TO SET THE LINER HANGER. SLACK OFF TO 75K TO ENSURE THE HANGER IS SET. PRESSURE UP TO 4,000-PSI AND RELEASE THE LINER FROM THE HRD-E TOOL. BLEED OFF PRESSURE AND PICK UP STRING TO EXPOSE DOG SUB. SLACK OFF AND ROTATE AT 20-RPM TO CONFIRM PACKER IS SET. 05:00 - 07:00 2.00 CASING P RUNPRD PJSM,BLOW DOWN THE TOP DRIVE AND RIG UP TO TEST THE LINER TOP PACKER. RIG UP AND TEST 250-PSI LOW FOR 5 CHARTED MINUTES,3,500-PSI FOR 30 CHARTED MINUTES.TEST GOOD -btt A I I AGHhD CHART. BARRIERS OF WELL- 8.5-PPG KILL WEIGHT FLUID,SEAWATER/ MOBM 07:00 - 07:30 0.50 CASING P , RUNPRD RIG DOWN TESTING EQUIPMENT,BLOW DOWN LINES,PULL OUT OF THE HANGER, LAY DOWN 2 JOINTS OF 4"DRILL PIPE TO PIPE SHED. 07:30 - 09:30 2.00 . CASING P RUNPRD PJSM ON DISPLACEMENT FROM OBM TO , 8.5-PPG SEA WATER. -PUMP 70-BBL,8.6-PPG, HI-VIS SOAP SWEEP. -RECIPROCATE 1 FULL STAND 93'DURING DISPLACEMENT -FOLLOW WITH 8.5-PPG SEAWATER FROM PITS. 09:30 - 10:30 1.00 CASING P RUNPRD 10 MINUTE FLOW CHECK,WELL STATIC. BLOW DOWN TOP DRIVE,CLEAN RIG FLOOR AND PITS OF OIL BASED MUD. 10:30 - 12:00 1.50 CASING P RUNPRD SLIP AND CUT DRILLING LINE,SERVICE BLOCKS AND TOP DRIVE. 12:00 - 12:30 0.50 CASING P RUNPRD KICK WHILE TRIPPING DRILL. -CREW RESPONSE TIME 55-SECONDS. -HELD AFTER ACTION REVIEW. -CALIBRATE BLOCK HEIGHT. 12:30 - 15:00 2.50 CASING P RUNPRD PULL OUT OF THE HOLE FROM 8,685'TO 5,884'. LAY DOWN 4"DRILL PIPE TO THE PIPE-SHED. -MW IN 8.5-PPG,MW OUT 8.5-PPG. 15:00 - 16:00 1.00 CASING P RUNPRD RUN IN THE HOLE ON STANDS FROM THE DERRICK FROM 5,884'TO 8,215'. 16:00 - 17:00 1.00 CASING P RUNPRD REVERSE CIRCULATE TO FLUSH DRILL PIPE OF ANY OIL BASED MUD 4-BPM,400-PSI. -RIG DOWN EQUIPMENT,BLOW DOWN TOP DRIVE, OUT OF CRITICAL PATH: RIG DOWN ROCKWASHER AND MOVE AWAY FROM RIG. 17:00 - 23:30 6.50 CASING P RUNPRD LAY DOWN 4"DRILL PIPE FROM 8,215'TO BAKER RUNNING TOOL. -LAY DOWN BAKER TOOLS.DOG SUB SHEARED Printed 5/14/2012 11:20:59AM North America-ALASKA- BP Page 3 of 6 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: COM-ONSHORE(CON) Start Date:4/22/2012 End Date: X3-00XCG-C: (3,184,597.00) X3-010GH-C: Project: Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 , Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 23:30 - 00:00 0.50 CASING P RUNPRD PICK UP 1 JOINT OF 4"DRILL PIPE AND THE STACK WASHER,FLUSH STACK AND BOPE RAM CAVITIES OF ALL OBM. -10.5 BPM,70 PSI, ROTATE AND RECIPROCATE. WAIT ON SLB TO ARRIVE ON LOCATION* 4/25/2012 00:00 - 01:00 ' 1.00 CASING N RUNPRD WAIT ON SCHLUMBERGER TO ARRIVE ON LOCATION LAY DOWN JOINT AND PORTED SUB USED FOR FLUSHING STACK. -BLOW DOWN TOP DRIVE PREP FLOOR FOR UPCOMING USIT J,QG RUN 01:00 - 19:30 18.50 EVAL P RUNPRD PJSM WITH SCHLUMBERGER -SPOT WIRELINE UNIT,MOBILIZE TOOLS TO FLOOR. -MAKE UP USIT LOG WITH CBL.RUN IN HOLE WITH WIRELINE. 1-LOG FROM 8776'TO 5400'INTERMITTENT SPIKES IN LOG DATA. RUN BACK TO BOTTOM AND RE-LOG AT A LOWER RESOLUTION. LOG FROM 8776'TO 3600'. PULL OUT OF THE HOLE 3600'AND DISCOVER A 28'DEPTH DISCREPANCY FROM RE-ZERO. LOG CANNOT BE USED AS PRIMARY DEPTH CONTROL. FIELD PICK OF TOC 4535'. 19:30 - 20:00 0.50 CASING P j RUNPRD PULL WEAR RING. 20:00 - 23:00 3.00 RUNCOM P RUNCMP ,RIG UP TO RUN 4-1/2".12.6#.13CR VAM TOP _TUBING. REMOVE ELEVATORS AND ELEVATOR LINKS. INSTALL COMPENSATOR EQUIPMENT, LONG ELEVATOR LINKS AND SINGLE JOINT ELEVATORS. MAKE DUMMY RUN WITH HANGER AND MARK. RIG UP TONGS. 23:00 - 00:00 1.00 RUNCOM P RUNCMP RUN TUBING AS PER TALLY TO 450'. UTILIZE BAKER LOK ALL CONNECTIONS BELOW THE BOTTOM PACKER AND JET LUBE SEAL GUARD TO ALL OTHER CONNECTIONS. 'TORQUE TURN ALL CONNECTIONS TO 4400 FT/LBS. TOTAL LOSSES FOR DAY=11 BBLS. 4/26/2012 00:00 - 11:00 11.00 RUNCOM P RUNCMP CONTINUE TO RUN 4-1/2", 12.6#VAM TOP COMPLETION TUBING PER PROGRAM FROM 450'TO 8 7Q011p. UTILIZE JET LUBE SEAL GUARD,TORQUE TURN ALL CONNECTIONS TO 4,400 FT/LBS. -KICK WHILE TRIPPING DRILL CREW RESPONSE TIME 218 SECONDS HOLD AFTER ACTION REVIEW. 11:00 - 12:30 1.50 RUNCOM P RUNCMP CONTINUE TO RUN 4-1/2"COMPLETION. :-PUW-150K SOW-142K.ABOVE TBR -TAG UP ON BASE OF PBR AT 8,806. -SPACE OUT WIRELINE ENTRY GUIDE AT 8,800'-MD -LAND TUBING, FMC RUN IN LOCKDOWN SCREWS. -LAY DOWN LANDING JOINT. Printed 5/14/2012 11:20:59AM North America -ALASKA- BP Page 4 of 6 Operation Summary Report Common Well Name:Z-50 AFE No Event Type:COM-ONSHORE(CON) Start Date:4/22/2012 End Date: X3-00XCG-C: (3,184,597.00) X3-010GH-C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:30 - 15:30 3.00 RUNCOM P RUNCMP RIG UP TO DISPLACE TO 9.2-PPG BRINE. -PUMP 135-BBLS,120 DEGREE 9.2-PPG BRINE. -PUMP 60-BBLS OF BRINE WITH CORROSION INHIBITOR. -PUMP 105-BBLS,120 DEGREE 9.2-PPG BRINE. PUMP 5-BBLS DOWN THE TUBING TO WASH OFF RHC SEAT. ICP=560-PSI, 4-BPM,FCP=570-PSI AT 4-BPM. 15:30 - 19:30 4.00 RUNCOM P RUNCMP DROP BALL AND ROD TO RHC PLUG IN .X-NIPPLE.SET PACKER, RIG UP AND TEST TUBING 250-PSI LOW FOR 5 CHARTED MINUTES,3,500-PSI HIGH FOR 30 CHARTED .QINUTES,BLEED TUBING PRESSURE TO 2nnn-PSL TEST PACKER 250-PSI LOW, 5-CHARTED MINUTES AND 3.500-PSI HIGH, 45-CHARTED MINUTES.TESTS ARE GOOD. -BLEED OFF ALL PRESSURE,OBTAIN WTL AUTHORIZATION TO PROCEED WITH OPERATIONS PRIOR TO SHEARING DCK VALVE. PRESSURE TUBING TO 1,500-PSI, I PRESSURE IA TO 3,500-PSI,BLEED TUBING PRESSURE TO SHEAR DCK VALVE. -CONFIRM ABILITY TO FREEZE PROTECT PUMP DOWN 7"X 4-1/2"ANNULUS AT 2-BPM, • 500-PSI PUMP DOWN TUBING 2-BPM,400-PSI **DOWNHOLE BARRIERS=BALL ROD ON SEAT WITH KWF ON TOP,SET AND TESTED PRODUCTION PACKER. 19:30 - 20:00 0.50 BOPSUR P WHDTRE RIG UP AND FLUSH STACK FOR VISUAL BOP INSPECTION OF RAMS. 106-SPM,70-PSI,20-RPM. RIG DOWN. 20:00 - 20:30 0.50 BOPSUR P WHDTRE INSTALL TWC WITH FMC 20:30 - 22:30 2.00 BOPSUR P WHDTRE TEST TWC FROM BELOW 250-PSI LOW, 5-MINUTES.3.500-PSI HIGH FOR 30-MINUTES. TEST FROM ABOVE 250-PSI LOW FOR 5-MINUTES.3.500-PSI HIGH FOR 5-MINUTES. ALL TEST CHARTED AND PASS TEST CRITERIA. **DOWNHOLE BARRIERS=BALL ROD ON SEAT WITH KWF ON TOP,SET AND TESTED PRODUCTION PACKER,SET AND TESTED TWC. 22:30 - 00:00 1.50 BOPSUR P WHDTRE BLEED OFF EQUIPMENT, BLOW DOWN LINES, SUCK OUT BOP STACK FOR UPCOMING RAM INSPECTION,BLOW DOWN INJECTION LINE, PUMP LINE, HOLE FILL LINE, CHOKE,KILL LINE. Printed 5/14/2012 11:20:59AM • North America -ALASKA- BP Page 5 of 6 Operation Summary Report - -- - -- - - ------ - - ---------------- Common Well Name:Z-50 AFE No Event Type: COM-ONSHORE(CON) Start Date:4/22/2012 End Date: X3-00XCG-C: (3,184,597.00) X3-010GH-C: Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor:DOYON DRILLING INC. !UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase I Description of Operations (hr) (ft) 4/27/2012 00:00 - 03:30 3.50 BOPSUR P WHDTRE **BARRIERS PRESENT IN WELL PRIOR TO NIPPLE DOWN OF BOPE** -TWC TESTED FROM BELOW TO 3,500-PSI WITH KWF ON TOP OF BALUROD IN RHC PROFILE -TESTED PRODUCTION PACKER TO 3,500-PSI -KW FLUID AND CASING ANNULUS VALVE. VISUAL INSPECTION OF BOPE AND RAMS FOR Z-06A HIGH GOR WELL. -OPEN ALL RAM DOORS -WSL,VISUALLY INSPECT BOP DOOR SEALS, RAMS SEALS AND CONDITION OF BOPE. *OUT OF CRITICAL PATH INSPECT AND CHANGE OUT SAVER SUB* 03:30 - 05:00 1.50 BOPSUR P WHDTRE CLOSE RAM DOORS AND TORQUE ALL BOLT. 05:00 - 07:30 2.50 BOPSUR P WHDTRE NIPPLE DOWN BOPE,REMOVE CHOKE HOSE AND RISER. 07:30 - 08:00 0.50 BOPSUR P WHDTRE RACK BACK BOPE STACK AND SECURE ON BOP STUMP FOR RIG MOVE. 08:00 - 11:00 3.00 WHSUB I P WHDTRE I INSTALL ADAPTER FLANGE AND DRY HOLE TREE. -INSTALL FLANGES, GAUGES AND VALVES, TEST NON-WORKING IA VALVE AND WORKING OA ANNULUS VALVE TO 3,000-PSI CONFIRM ALL ARE LEAK TIGHT. -TEST VOID 250-PSI LOW 5,000-PSI HIGH FOR 5-MINUTES EACH. 11:00 - 12:00 1.00 WHSUB P WHDTRE RIG UP TO PRESSURE TEST TREE AND ADAPTER FLANGE. 12:00 - 14:00 2.00 WHSUB P WHDTRE PRESSURE TEST TREE WITH DIESEL TO 250-PSI LOW 5-CHARTED MINUTES/ 5,000-PSI HIGH 10-CHARTED MINUTES.TEST GOOD. 14:00 - 17:00 3.00 WHSUB P WHDTRE RIG UP DSM LUBRICATOR,PRESSURE TEST SAME. 250-PSI,3,500-PSI HIGH 5-CHARTED MINUTES EACH.TEST GOOD. PULL TWC WITH DSM UTILIZING LUBRICATOR.NO PRESSURE OBSERVED BELOW TWC. **BARRIERS PRESENT IN WELL PRIOR TO FREEZE PROTECT** -KWF ON TOP OF BALL/ROD IN RHC PROFILE -TESTED PRODUCTION PACKER TO 3,500-PSI -KW FLUID AND CASING ANNULUS VALVE. 17:00 - 20:00 3.00 WHSUB P WHDTRE RIG UP LINES FROM LRHO TO FREEZE PROTECT -PRESSURE TEST LINES 250-PSI LOW/ 3,000-PSI HIGH 5-CHARTED MINUTES.TEST GOOD -PUMP 74-BBL'S TOTAL HEATED DIESEL DOWN IA FREEZE PROTECTING TUBING AND ANNULUS TO 2,000' 20:00 - 22:00 2.00 WHSUB P WHDTRE LINE UP AND ALLOW WELL TO U-TUBE ANNULUS TO TUBING AND EQUALIZE Printed 5/14/2012 11:20:59AM North America -ALASKA- BP Page 6 of 6 Operation Summary Report Common Well Name:Z-50 AFE No Event Type: COM-ONSHORE(CON) Start Date:4/22/2012 End Date: X3-00XCG-C: (3,184,597.00) X3-010GH-C: Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time:4/1/2012 12:00:00AM Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum: ROTARY TABLE @89.65ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) '22:00 - 23:30 1.50 WHSUB P WHDTRE RIG UP DSM LUBRICATOR -PRESSURE TEST LUBRICATOR 250-PSI LOW /3,500-PSI HIGH,5-CHARTED MINUTES EACH. TEST GOOD. -INSTALL BPV 23:30 - 00:00 0.50 WHSUB P WHDTRE RIG UP AND PREPARE TO PRESSURE TEST BPV FROM BELOW WITH LRHO. 4/28/2012 00:00 - 01:00 1.00 WHSUR P WHDTRE TEST BPV FROM BELOW WITH LRHQ SERVICES. 250-PSI LOW 5-CHARTED MINUTES/3,500-PSI HIGH 30-CHARTED MINUTES.TEST GOOD:— BLOW DAWN LINES AND RIG DOWN LRHO. 01:00 - 02:00 1.00 WHSUR P WHDTRE BLEED AND VERIFY NO PRESSURE ON IA,OA AND TUBING.ALL ARE ZERO -SECURE CELLAR AND WELLHEAD **BARRIERS PRESENT IN WELL PRIOR TO RIG MOVING OFF WELL** -TESTED TREE BPV TESTED FROM BELOW TO 3,500-PSI AND KWF ON TOP OF BALUROD IN RHC PROFILE TESTED_PRODUCTION PACKER TO 3,500-PSI -KW FLUID AND CASING ANNULUS VALVES. **RIG RELEASED FROM Z-50 AT 02:00 HRS" REFER TO Z-06A OPERATIONS DAILY REPORT#1 FOR FURTHER INFORMATION. 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Dispatched To: Christine Mahnken Well No Z-50 Date Dispatched: 4/26/2012 Installation/Rig Doyon 14 Dispatched By: Brian Muzny Data No Of Prints No of CDs Surveys 2 1 Received By: / h I, `,(`AF�� Please sign and return to: Drilling&Measurements LWD Division 2525 Gambol!Street,Suite 400 Anchorage,Alaska 99501 pwvman@slb.com Fax:907-561-8317 LWD Log Delivery V1.0,01/22/2010 ALC,\ SEA SEAN PARNELL,GOVERNOR ALASKA OIL AND GAS 333 W.7th AVENUE,SUITE 100 CONSERVATION COMMISSION ANCHORAGE,ALASKA 99501-3539 PHONE (907)279-1433 FAX (907)276-7542 Ken Allen Engineering Team Leader BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU Z-50 BP Exploration (Alaska), Inc. Permit No: 212-001 Surface Location: 4296' FSL, 2847' FEL, SEC. 19, T11N, R12E, UM Bottomhole Location: 2989' FSL, 911' FEL, SEC. 24, T11N, R12E, UM Dear Mr. Allen: Enclosed is the approved application for permit to drill the above referenced development well. This permit to drill does not exempt you from obtaining additional permits or an approval required by law from other governmental agencies and does not authorize conducting drilling operations until all other required permits and approvals have been issued. In addition, the Commission reserves the right to withdraw the permit in the event it was erroneously issued. Operations must be conducted in accordance with AS 31.05 and Title 20, Chapter 25 of the Alaska Administrative Code unless the Commission specifically authorizes a variance. Failure to comply with an applicable provision of AS 31.05, Title 20, Chapter 25 of the Alaska Administrative Code, or a Commission order, or the terms and conditions of this permit may result in the revocation or suspension of the permit. Sincerely, Daniel T. Seamount, Jr. Chair DATED this / day of January, 2012. cc: Department of Fish 85 Game, Habitat Section w/o encl. (via e-mail) Department of Environmental Conservation w/o encl. (via e-mail) D STATE OF ALASKA 1, kl E �►� ALASKI,OIL AND GAS CONSERVATION COMMISSION ,,,G� �• PERMIT TO DRILL 161` ti :- 1' ' /-S%? 20 AAC 25.005 ,i 1 a.Type of work: lb.Proposed Well Class: ®Development Oil 0 Service-Wini 0 Single ZonNaSC i aeMprc OlfeliOn Si Drill 0 Redrill 0 Stratigraphic Test 0 Development Gas 0 Service-Supply 0 Multiple Zone 0 CoalpRildfiNia@ Gas Hydrates 0 Re-Entry 0 Exploratory 0 Service-WAG 0 Service-Disp Shale Gas 2. Operator Name: 5.Bond: ® Blanket 0 Single Well 11. Well Name and Number: BP Exploration(Alaska) Inc. Bond No. 6194193 PBU Z-50 3. Address: 6. Proposed Depth: 12.Field/Pool(s): P.O. Box 196612,Anchorage,Alaska 99519-6612 MD 11164' ND 9031' Prudhoe Bay/Prudhoe Bay 4a. Location of Well(Governmental Section): 7. Property Designation(Lease Number): Surface: ADL 028262&028245 4296'FSL,2847'FEL, SEC. 19,T11N, R12E, UM Top of Productive Horizon: 8. Land Use Permit: 13. Approximate Spud Date: 3709'FSL,4203'FEL, SEC. 19,T11N, R12E, UM February 1,2012 Total Depth: 9.Acres in Property: 14.Distance to Nearest Property: 2989'FSL,911'FEL, SEC.24,T11 N, R12E, UM 2560 4380' 4b. Location of Well(State Base Plane Coordinates-NAD 27): 10.KB Elevation above MSL: 90.5' feet 15.Distance to Nearest Well Open Surface: x- 599831 y-5959100 Zone- ASP4 GL Elevation above MSL: 56.2' feet to Same Pool: 861' 16.Deviated Wells: Kickoff Depth: 800' feet 17.Maximum Anticipated Pressures in psig(see 20 AAC 25.035) Maximum Hole Angle: 104 degrees Downhole: 3812 ' Surface: 2918 • 18. Casing Program: Specifications Top-Setting Depth-Bottom Quantity of Cement,c.f.or sacks Hole Casing Weight Grade Coupling Length MD ND MD TVD (including stage data) 42" 20" 133# A-53 PE 80' Surface Surface 80' 80' 260 sx Arcticset(Aoorox.) 12-1/4" 9-5/8" 40# L-80 BTC 3195' Surface Surface 3195' 3061' 1187 sx DeeoCrete.408 sx Class'G' . 8-3/4" 7" 26# L-80 TCII 9059' Surface,Surface 9041' 8721' 492 sx LiteCrete. 184 sx Class'G' 6-1/8" , 4-1/2" 12.6# 13Cr85 VAMTOP 2108' 9056' 8645' 11164' 9031' Uncemented Sliding Sleeves 19. PRESENT WELL CONDITION SUMMARY(To be completed for Redrill and Re-entry Operations) Total Depth MD(ft): Total Depth ND(ft): Plugs(measured): Effective Depth MD(ft): Effective Depth ND(ft): Junk(measured): Casing Length Size Cement Volume M0 , . Conductor/Structural Surface Intermediate Production Liner Perforation Depth MD(ft): Perforation Depth ND(ft): 20.Attachments: Property Plat 0 BOP Sketch ®Drilling Program 0 Time vs Depth Plot 0 Shallow Hazard Analysis 0 Diverter Sketch 0 Seabed Report ®Drilling Fluid Program IN 20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the foregoing is true and correct. Contact Cody Rymut,564-5452 Printed Name Ken Allen Title Engineering Team Leader � Prepared By Name/Number ^ . Signature ' C: Phone 564-4366 Date 1/..:20/i .2 Terrie Hubble,564-4628 Commistion th40001Y., ,.,, ., . , vA u(., ,, .. Permit To Dril API Number: Permit Approval Da See cover letter for Number: /�0Q,, 50-0,9?90?3li63. NiA\ / other requirements Conditions of Approval: If box is checked,well may not be used to explore for,test,or produce coalbed methane,gas hydrates,or gas contained shales: 3 500 195 BOP /e S t Samples Req'd: Yes No Mud LogReq'd: ❑ es No Other: p ❑/ q' PID/ r, `wa Z. t ad o HZS Measures: ® Yes 0 No Directional Survey Req'd: Yes 0 No — i(Ge 7t.-a ,9 ZoA4c 1S' O33Cj ) /// 3/I APPROVED BY THE COMMISSION l Date if� / ,COMMISSIONER Form 10-401 Revised 07/2009 This permit is valid foraorzi tfGlirgaAotamlpprov I(20 AAC 25.005(g)) Submit In Duplicate I Well Name: Z-50 Drill and Complete Plan Summary Name Position Office Home Cell Cody Rymut Drilling Engineer 5452 230-3594 Roger Sels New Well Delivery Geologist 5215 240-8096 Bob Dawson Ops Geologist 5264 345-3359 242-2391 Mike Francis New Well Delivery PE 4240 644-0534 529-8678 Type of Well (service / producer/ injector): Producer Surface Northing Easting Offsets TRS Location 5,959,100.19 599,831.02 4295.04 FSL / 2846.35 FEL 11N, 12E, 19 Target Northing Easting TVDss Offsets TRS Locations 5,958,496 598,485 -8790 3709' FSL / 4203' FEL 11N, 12E, 19 " Bottom Northing Easting TVDss Offsets TRS Location 5,957,755 596,830 -8940 2989' FSL / 911' FEL 11N, 11E, 24 API NUMBER: NA Rig: Doyon 14 Estimated Start Date: 02/01/12 Operating Days to complete: 27.5 MD: 11164' TVD: 9031' RT/GL: 34.3/56.2' RTE: 90.5 • Well Design: Grassroots Ivishak Zone 4 Producer 4-1/2" tbg, 12.6# 13Cr-85, Vam Top solid liner with swell packer and sliding sleeve design Objective: Z4 Producer Directional Plan: Version: SLB WPO8b KOP: 800' MD, build 1.5/100 Maximum Hole Angle: 103.8° Close Approach Wells: All wells pass major risk criteria. Reference anti-collision report Nearest well within Pool TD 861' from Highland State Distance to Nearest Property PBU boundary 4380' west of T.D. Line: Z-65 Permit Application Page 1 Logging Program: Surface Interval Drilling, MWD: GR/Res Open Hole: None Cased Hole: None Intermediate Interval Drilling, MWD: Real time GR/RES/DEN/NEU Open Hole: N/A Cased Hole: USIT Production Interval Drilling, MWD: GR/RES/AziDEN/NEU Open Hole: None Cased Hole: None Mud Program: 12-1/4" Surface Hole: Fresh Water Drilplex Mud Density Funnel Viscosity LSYP Yield Point API FL �H (ppg) (seconds) (2x3-6 rpm) (Ib/100ft2) (mis/30min) Spud to Base 8.8—9.4 60-120 (for reference 30—50 40—80 Less than or 10.8 PF only. Fluid should be equal to 8 run off LSYP) Base PF to TD 8.8—9.4 60-120 (for reference 20—45 40—80 Less than or 10.8 only. Fluid should be equal to 6 run off LSYP) 8 3/4" Production Hole: LSND MW PV YP API FL Interval pH (ppg) (cp) (Ib/1000ft2) (ml/30min) Csg Shoe to BCM2 8.8-9.2 12 - 18 20—28 < 10 9 - 10 TCM2toTD 10.2 15 -22 20 -28 4 -6 9 - 10 6-1/8" Production Hole: Reservoir Drill-in Fluid Depth Interval De t (ppg) PV YP LSVR API Fl pH Csg Shoe to TD 8.5-8. ) 6 - 12 20 -28 > 20,000 6.0— 10 8.5 - 9.5 Z-65 Permit Application Page 2 Casing/Tubing Program: Hole Size Csgl Wt/Ft Grade Connection Length Top Btm Tbg O.D. MD/TVD MD/TVD 42" 20" 133 A-53 PE 80' GL 80'/80' 12 1/4" 9 5/8" 40 L-80 BTC 3195' GL 3195'/3161' 8 3/" 7" 26 L-80 TCII 9059' GL 9041'/8721' 6 1/8" 4 W 12.6 13Cr-85 VAM TOP 2108' 9041' /8721' 11164' /9031' Tubing 4 W 12.6 13Cr-85 VAM TOP 9056' GL 9041' /8721' Formation Integrity Testing: �►� N Test Point Depth Test Type 9-5/8" Surface Casing 20' — 50' from surface shoe LOT Test Point Depth Test Type 7" Intermediate Casing 20'—50' from intermediate shoe FIT Cement Calculations: Surface Casing: Casing Size 9 5/8" Basis: Lead: Open hole volume +250% excess in permafrost. Port collar used if necessary. Lead TOC: Surface Tail: Open hole volume +40% excess below permafrost+ 80' shoe track. 0tc_ Tail TOC: 1000' MD above the casing shoe Total Cement Volume: Lead 402bbl/2255 ft3/ 1187 sks of DeepCRETE at 10.7 ppg and 1.9 cf/sk /73.7a Tail 84.2 bbl/473 ft3/408 sks of Class `G' at 15.8 ppg and 1.16 cf/sk `xC Intermediate Casing: Casing Size 7" Basis: Lead: Open hole volume 30% excess Lead TOC: 500' MD above Mc C(,Cy.,4,) Tail: Open hole volume 30% excess + 80' shoe track. Tail TOC: 1000' MD above the casing shoe Total Cement Volume: Lead 161 bbl / 899 ft3/492sks of LiteCRETE at 11 ppg and 1.Bcf/sk Tail 38 bbl/213 ft3/ 184sks of Class 'G' at 15.8 ppg and 1.16 cf/sk Production Liner: Casing Size 4 1/2" Basis: Lead: None Planned Lead TOC: NA Tail: None Planned 5-1i44- e ►��ke^� Tail TOC: NA Total Cement Volume: Lead None Planned Tail None Planned Z-65 Permit Application Page 3 Formation Markers: Estimated Estimated Depth Hydrocarbon Pore Pressure Pore Pressure Formation Formation Top Uncertainty Bearing Uncertainty (TVDss) (+1-TVD ft) (Yes/No) (EMW ppg)min, (EMW+/-ppg) ml,max G1 255 +1-20' No 8.35,8.40,8.45 +/-0.2 SV6 1025 +1-20' No 8.35.8.40,8.45 +/-0.2 EOCU 1595 +1.20' No 8.35.8.40.8.45 +/-0.2 SV5 1680 +/-20' No 8.35,8.40.8.45 +/-0.2 BPRF 1770 +1-20' No 8.35.8.70_.8.90 +1-0.2 Hydrates below SV4 1805 +/-20' BPRF 8.35,8.70.8.90 +1-0.2 SV3 2295 +/-40' Hydrates 8.35,8.70.8.90 +1-0.2 SV2 2480 +1-40' Hydrates 8.35.8.70.8.90 +/-0.2 SV1 2800 +1-40' Hydrates 8.35,8.70.8.90 +/-0.2 9 5/8" casing point 3070 _ UG4 3105 +1-40' No 8.35.a.m.9.30 +/-0.2 UG4A 3170 +/-40' No 8.35,8.70.8.80 +1-0.2 Fault#1 (Highland State Fit)-3510'M.D. 3390 +/- 100' M.D. See Fault Section below tor details UG3(faulted top) 3390 +/-40' No 8.35,8.70.8.80 +1-0.2 UG1 3730 +/-40' No 8.35,8.70.8.80 +/-0.2 UG_Ma 4015 +1-40' Heavy oil 8.35,8.70,8.80 +/-0.2 l UG_Mb1 4065 +1-40' Heavy oil 8.35.8.70.8.80 +/-0 2 i _ 4115 +/-40' Heavy oil 8.35,8.70,8.80 +/-0.2 UG_Mc 4160 +/-40' Heavy oil 8.35.8.70,8.80 +/-02 a 4235 +/-25' Yes 8.45.8.70.8.70 +/-0.2 _ Il SB_Nb 4260 +/-25' Yes 8.45,8.70,8.70 +/-0.2 SB_Nc 4300 +/-25' No 8.45.8.70,8.70 +/-0.2 I SB_OA 4410 +/-25' Yes 8.45,8.70,8.70 +/-0.2 SB OBa 4475 +/-25' Yes 8.45,8.70,8.70 +/-0.2 SB�OBb 4505 +/-25' Yes 8.45.8.70.8.70 +/-0.2 4 SB OBc 4550 +/-25' Yes 8.45,8.70.8.70 +/-0.2 SB OBd 4610 +/-25' Yes 8.45,8.70.8.70 +/-0.2 SB_OBe 4675 +/-25' Yes 8.45.8.70.8.70 +/-0.2 SB_OBf 4715 +/-25' Yes 8.45,8.70,8.70 +/-0.2 SB_OBf_Base 4760 +1-25' No 8.45,8.70,8.70 +/-0.2 CM-2 5130 +/-40' No 8.45.8.70.8,70 +/-0.5 Top Overpressure' 5910 +/-60' No 9.00.10.00.10.00 +/-0.2 CM-1 5950 +/-40' No 9.40.10.00,10.20 +/-0.2 TLBK 6170 +1-40' No 9.40.10.00.10.70 +/-0.2 THRZ 6345 +/-40' No , 9.40, /0.00,10.30 +/-0.2 TKLB ' 6575 +1-40' No 9.40.10.00:10.30 +/-0.2 TKC4 6595 +/-40' Yes 6.40.9.50.10.40 +/-0.2 TKB/LCU 6640 +/-40' No 8.45,10.00.10.40 +/-0.2 TKA4 6680 +1-40' No 8.45.10.00.10.00 +/-0.2 TMLV 6710 +/-40' No 9.60.10.00.10.30 +/-0.2 TKNG 7475 +/-40' No 9.60. 10.00,10.50 +/-0.2 TJG 7500 +/-40' No 9.60. 10.00:10.50 ' +/-0.2 TJF 7786 +/-40' No 9.60, 10.00.10.50 +/-0.2 TJE 8010 +/-40' No 9.60,10.00,10,50 +/-0.2 TJD 8255 +1-40' No 9.60.10.00.10.50 +/-0.2 TJC 8385 +/-40' No 9.60.10.00.10.50 +/-0.2 Fault#2(8818' M.D.) 8450 +1- 150' M.D. See Fault Section below for details TJB 8505 41-40' No 9.60.10.00.10.50 +/-0.2 _ TJA 8560 +/-40' No 9.60,10.00.10.50 +/-0.2 TSGR 8630 +/-20 Yes gas 714.8.31.8.60 +/-0.2 TSHA 8655 +/-20 Yes gas 7.12.8.29,9.70 +/-0.2 � Z-65 Permit Application Page 4 TEIL 8750 +1-20 Yes aas 7.12.8.29.9.70 +/-0 2 ' PGOC (above TSAR) 8770 TSAD(46P) 8790 +1-20 Yes oiVgas 7.05.8.20.8.63 +/-0.2 45N 8814 +/-20 Yes oil/gas 7.05,8.20.8.63 +/-0.2 45P 8820 +1-20 Yes oil/aas 7.05.8.20.8.63 +/-0.2 44N 8846 +/-20 Yes oil/aas 7.05.8.20,8.63 +/-0.2 44P 8850 +/- 20 Yes oil/gas 7.05,8.20,8.63 +/-0.2 43N 8863 +/- 20 Yes o l/aas 7.05,8-20.8.63 +/-0.2 43P 8867 +/-20 Yes oil/aas 7.05.8.20,8.63 +1-0.2 42N 8879 +/-20 Yes oil/qas 7.05.8.20.8.63 +/-0.2 42P 8887 +/-20 Yes oil/gas 7.05.8,20.8.63 +/-0.2 42P(after invert) 8870 +/-20 Yes oil/aas 7.05.8.20.8.63 +/-0.2 42N 8858 +/-20 Yes oiVgas 7.05.8.20.8.63 +/-0.2 43P 8838 +1-20 Yes oil/oas 7.05,8.20,8.63 +1-0.2 43N 8832 +/-20Yes oiVgas 7.05,8.20,8.63 +1-0.2 Fault#3 (10,100' M.D.) 8810 +/- 100' M.D.+See Fault Section below for detail:; 43P 8789 +1-20 Yes oil/gas 7.05.8.20.8.63 -1.0.2 42N(after revert) 8790 +.I-20 Yes oil/gas 7.05,8.20,8.63 -1-0.2 42P 8795 +/-20 Yes oil/aas 7.05,8.20.8.63 41 N 8814 +/-20 Yes oil/gas 7.05.8.20,8.63 +/-0.2 41 P 8841 +/-20 Yes Oil/gas 7.05.8.20.B 63 -/ 0 2 31N 8864 +/-20 Yes oil/qas 7.05,8.2o,8.63 -/-0.2 31P 8867 +1-20 Yes oil/gas 7.05,8.20,8.63 -1-0.2 27N 8914 +/-20 Yes oiVgas 7.05.8.20,8.63 +7-0.2 TD 8940 Comments Top Overpressure'-seismic expression obscured by Highland St Flt / Z-65 Permit Application Page 5 Well Control: 12 1/4" hole will be drilled with diverter. The 8 3/4" intermediate hole and the 6-1/8" production hole will use well control equipment consisting of 5000 psi working pressure pipe rams (2), blind/shear rams, and annular preventer will be installed and is capable of handlin_ potential surface pressures. Annular preventer and the rams will be tested t• 3500 • he BOP test frequency will be conducted on a 14 day frequency, with a functio - every 7 days. Except for significant operational issues that may effect well integrity or pose safety concerns, an extension to the 14 day BOP test period should not be requested. Diverter, BOPE and choke manifold schematics of Doyon 14 are attached to this permit to drill. Production Interval- • Maximum anticipated BHP: 3812 psi @ 8940' TVDss, 8.2 ppg EMW • Maximum surface pressure: 2918 psi @ surface (based on BHP and a full column of gas from TD @ 0.10 psi/ft) • Planned BOP test pressure: • Annular Preventer 250 / 3500 psi • Rams 250 / 3500 psi • Planned completion fluid: 8.8 ppg brine from 11161'MD (TD) to 1900'MD / 6.8 ppg diesel from 2000'MD to surface (Freeze Protect) = 3894psi. The expected BHP seen through the sliding sleeves is 3812psi. Kick Tolerance/ Integrity Testing Summary Table Casing and Casing Maximum Influx Mud Exp Pore LOT/ Interval Test Volume Weight Press FIT Pressure 95/8" Surface 3500 psi 5OBBLS (assuming 10.2 10 LOT Casing 13.2 LOT) 7" Intermediate 3500 psi Infinite (assuming 8.4 8.2 FIT Liner 9.2 FIT) 61/8"" Production 3500 psi NA NA NA NA Casing Disposal: • No annular disposal in this well. • Cuttings Handling: Cuttings generated from drilling operations will be hauled to grind and inject at DS-04. • Fluid Handling: Haul all drilling and completion fluids and other Class II wastes to DS- 04 for disposal. Haul all Class I wastes to Pad 3 for disposal. Variance Request: To avoid the risk of plugging the flow line with large rocks and wood encountered while drilling surface hole, it is requested to drill without a flow paddle for the first portion of the surface hole. After drilling past the larger rocks and wood sections, the flow paddle will be put back in the flow line (<1000'). ✓ I • �a� jaAAA.A Z-65 Permit Application Page 6 Z-50- Drill and Complete Procedure Summary Pre-Rig Work: 1. A 20"conductor has been set. Weld an FMC landing ring for a Gen 5 well head. 2. If necessary, level the pad and prepare location for rig move. 3. Remove well houses as necessary. Rip Operations: . 1. MIRU Doyon 14. NU diverter spool and function test. Prep pits with Drillplex mud, PU drill pipe as required and stand back in derrick. 2. MU 12-'/4" drilling assembly with MWD/GR. Spud and directionally drill surface hole to TD. Gyro data will be required until clean surveys can be taken (-500'). If needed, perform wiper trip at the base of permafrost. CBU until hole is clean,then POOH racking back DP and lay down BHA. 3. R/U, Run and cement the 9-%",40#, BTC, L-80 casing to surface, displacing cement with mud. (A TAM port collar may be run as a contingency if hole conditions indicate a need) 4. ND diverter spool and NU and test casing/tubing head. NU BOPE and test rams @ 250psi low/3,500 psi high and annular to 250psi low/3,500 psi high. 5. MU 8-3/4"drilling BHA with MWD/GR/RES/DEN/NEU/PWD and RIH to float collar. Pressure test the 9-%" casing to 3,500 psi for 30 minutes. 6. Drill shoe track and displace well to LSND drilling fluid. Drill new formation to 20-50' below 9-%" shoe and perform LOT. 3.2_17.y 7. Drill ahead to+/-200' and above the HRZ, circulate the well clean, weight up mud to 10.2 ppg. 8. Ensure mud weight of 10.2 ppg prior to drilling ahead in the HRZ. Continue drilling to TD at the Top SAG. At TD, CBU, and condition hole as necessary to run 7"casing. 9. Pump out to top HRZ, return to bottom, CBU, TOH on elevators. 10. Change upper VBR casing rams to 7"casing rams and test to 3500psi. Ozj M° -- • 11. RU and run 7"26# L-80 TCII casing to TD. Cement the 7" casing to 500' MD above the top of the Mc. 12. Confirm that the OA is open immediately and also before freeze protecting. Freeze-protect the 9-%"x 7" annulus, once the tail cement has reached 500 psi compressive strength. 13. Change upper 7"casing rams to 3-1/2"x6"VBR rams and test to 3500 psi. 14. PU 6-W drilling BHA assembly and RIH to the landing collar. On top of the float collar test the casing to 3,500 psi for 30 minutes. 15. Displace the well to 8.5 ppg Reservoir Drill-in Fluid. 9.2P/ 16. Drill out shoe and 20'-50' of new formation and perform the planned FIT. Drill ahead, per directional proposal and rig site geologist to landing point of build section. 17. Drill ahead per the directional plan to TD,watching for indications of poor hole cleaning 18. Circulate bottom up, and continue to circulate and condition the hole until it is ready for LNR run. Z-65 Permit Application Page 7 19. MU and run the 4-'/z" 13Cr solid liner with swell packers and sliding sleeves. There will be 150' of overlap into the 7" intermediate casing. Set liner hanger and liner top packer as per BOT Rep and test LTP to 3500 psi for 30 minutes. Release from liner and displace well to brine. POOH and LD Drill Pipe and liner running tool. 20. Run a Cement Eval log from the top of the 4-1/2" LNR to surface. 5u-Ig'"-A- -4O ms"""'ss; 1,°( S r / '/2 off 21. R/U and run a 4- ", 12.6#, 13CR, VAMTOP tubing completion with GLMS. Space out and land a tubing with tubing tail inserted into the liner tieback sleeve. 22. Make up tubing hanger per FMC Rep. Land the tubing hanger, and run in lock down screws. 23. Reverse circulate filtered seawater and corrosion inhibitor into the tubing x casing annulus. 24. Drop ball/rod and set packer and individually test the tubing and annulus to 3,500 psi for 30 minutes. Record each test. 25. Shear the DCR valve. • 26. Install TWC and test.' 27. Nipple down the BOPE. Nipple up the adaptor flange and tree and test to 5,000 psi with diesel. 28. RU DSM lubricator and pressure test. Pull TWC. 29. RU circulating lines. Freeze protect the well to—2,000' TVD and allow diesel to U-tube reaching equilibrium. 30. Install and pressure test BPV. 31. Secure the well. Rig down and Move Off. Post-Riq Work: 1. MIRU slickline. Pull the ball and rod/RHC plug. 2. Pull dummy valves and replace with gas life valves. Pull VR plugs. 3. Install well-house, instrumentation and flowline. 4. Shift sliding sleeves with a CTU for desired production 5. Flow back to test separator. Z-65 Permit Application Page 8 POST THIS NOTICE IN THE DOGHOUSE Drilling Critical Issues POST THIS NOTICE IN THE DOGHOUSE I. Well Control: A. Normal pore pressures are expected throughout the surface hole drilling operations. B. Possible overpressure zones at the base of the CM-2, top of the CM-1 C. There is some possibility of encountering over pressure in the Shublik and in the Ivishak near Z- 33 injector. II. Hydrates and Shallow gas: A. Gas hydrates may likely be present in the SV5 through the SV1 surface hole below the Permafrost base. Use standard operating procedures for hydrates, if encountered. IV. Faults Lost circulation at fault crossing possible in the Intermediate section and Production section. Follow normal monitor and mitigation procedures for losses while drilling. (10) Fault Details Formation Where Encounter Fault MD Intersect TVOss Intersect Eat.Throw Throw Direction Uncertainty Fault 41 -Highland State Fault-Ugnu UG3 3,510 3.390 -170'to-220' Southwest 44-100'M.D Fault k2-Kinaak.TJC 8,818 -8 450 35' NNE ei 150'M D Fault k3-Ivishak Zone 4 10.040 -8.820 50' NNE +I.130 M.J. V. Kick Tolerance/ Integrity Testing: A. The 9 5/8" casing will be cemented to surface using a port collar at 500' if necessary. The 7" production casing will be cemented to 500' above the Mc but will keep sufficient standoff from below the 9 5/8" casing shoe. The 6-1/8" liner will be a cement-less completion which is held in place by swell packers. Kick Tolerance/Integrity Testing Summary Table Casing and Casing Maximum Influx Mud Exp Pore LOT/ Interval Test Volume Weight Press FIT Pressure 95/8" Surface 3500 psi 5OBBLS (assuminig 10.2 10 LOT Casing 13.2 LOT) 7" Intermediate 3500 psi Infinite (assuming., 8.4 8.2 FIT Liner 9.2 FIT) tf 61/8"" Production 3500 psi NA NA NA NA Casing VI. Lost Circulation / Breathing: A. Lost circulation potential when crossing the Highland Fault. There are three fault crossings planned throughout the entire well. One fault is expected in the reservoir interval. Follow LCM decision tree; reduce mud weight slightly. B. Shublik losses and breathing are possible. Follow Shublik mitigation plan. Z-65 Permit Application Page 9 VII. Broaching A. Monitor adjacent wells for broaching while drilling surface hole. IX. Hydrogen Sulfide A. This site should be treated as an H2S site with all the required precautions. (5) H2S Data Well Name H2S Level Reading Date Parent Well(if sidetrack) ria-new well #1 Closest SHL Well H2S Level Z-20 30 7/2/2010 #2 Closest SHL Well H2S Level Z-46 14 7/7/2010 #1 Closest 8HL Well H2S Level Z-04 10 7/1/2010 #2 Closest BHL Well H2S Level L-VO I uZ JUV Max.Recorded H2S on Pad/Facility L-100 '20 I 4 1L 3/2/2010 Other Relevant H2S Data (H2S alarms from rigs,etc.) H2S levels of 0-120 ppm have been recorded at Z Pad CONSULT THE Z PAD DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION Z-65 Permit Application Page 10 TREE= WELLHEAD= FMCZ-50 FA NOTES: ACTUATOR= KB.ELEV= Proposed BF.ELEV= KOP= /Max Angle= ..._ =— XXXX' I—j 9-5/8"TAM Port Collar if necessary Datum MD= Datum TVD= • ' 2200' I--I 4-1/2"HES X Nipple ID=3.813" 20"Insulated Conductor 91.5#A-53 I--I 80' GAS LIFT MANDRELS 9-5/8"CSG 40#L-80 BTC ID=8.835" 3195' ST MD ND DEV TYPE VLV LATCH PORT DATE L 5 3303 4 5422 3 6732 2 7645 1 8324 ——� xxxx' H roc 3620 Y4- 1.//.IL Minimum ID = 3.813" @4-1/2" HES X Nipple , , xxxx. H 4-1/2"HES X Nipple ID=3.813" ><- XXXX' — 7"x 4-1/2"HES TNT PKR ID=3.856" xxxx' H 4-1/2"HES X Nipple ID=3.813" 4-1/2"TBG 12.6#13Cr-85 VAM TOP — XXXX. 0.0152 bpf ID=3.958" J 8891' H BKR HNG/LTP / \ XXXX. H 4-1/2"WLEG ID=3.958" 7"CSG 26#L-80 VAM TOP HC — 9041' �• , 0.03826 bpf ID=6.276 it '®——� XXXX. H—I Swell Packers i c XXXX. H Baker 4-1/2"Cr Sliding Sleeve Shift-up-to-open w/Integral X profile 4-1/2"LNR 12.6#13Cr-85 VAM TOP — 11164' ---______...42222r467-1 XXXX Marker Joint/Indicator Sub 0.0152 bpf ID=3.958" DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 12/07/11 CDR Proposed Completion WELL: Z-50 FERMI No: AP No: BP Exploration(Alaska) CO 0 CD 0, NNN,.- N,'-0, 00 N.N. 00 t0,^ ONm OM M mn h M O) C? 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N 06,000N0010 moom01LOU) 0 1.0 hhNmmtppm r00mCV NNNO0 O mmrN N N N N N N N N N M d N 0 o '3E0 OOm00 00000 rOr t 0 m t b M 0 N M f'1 O 0 (0 0 m h u) r m t0 t0 O N N N Q r N N W m 00V. . = O O O m M 1 Mr-:,K6 OOmON r O a,j M m N N-r Q O C D0M p Q m m 066r-, m m m r m o am r r r m O M mmmmm 0010 001 mmmmm mmm0 010000 00000 mm00m 00000 0000 >• M M N 0 L L _ OJ W 0 0 0 0 O M O O O r o r,-m m m el,-o N M M O (.= . OO Mp. NM... r Or m N OOrQ 0 ‘-‘1-00 Q, O p M.COM, MrmKr 66666 rajN.6 rrMO > N p h m m m r r r m m m O m r r ,-00M00 m 0)I Q F m m m m m m m m m m m m m m m m Wm,,, r r m m m m m m m m m m m m m m m m m m m m m m m m m m m 7 W N L 7 0^ T ommmO mmMpM m0Omm mmmOO Nmmm W 2 m mmmmm CDmmmm 000V. W m7NO Qr.. ZN W F M ri^m bN NNuju)N NNrmN: (-:0)j NN O 6466 .- pp p Q p Q Q p p Q Q Q M N N N N M Q Q Q N m m X,- E Co N N N N N N N N N N N N N N N N N N N N N N N N N F-Z Cr y C.. -Z Q (/ ': alFW-10,1- W LL J N W W J {l e T mmmpO QQrMm ,-mmm,- O N r 0 Q Q 6.- 6.-O MM,, Q W ...-. N Qm.- NNDMr MNm Nn 0 ...COM NU- 6 LL n 60aMMNN M0000 0 0 6.-,:r: mr.- u6mmN rr-rrmmTOO 00000 m m r r -1.4.0 m J J LL W. COW, m N-m C O CON O= M p 111 o m p W N N m 0 O N O O M .000V 00.N E N O J 2= m m M000 N mt000 Or 00 m •-OOOm 00 N O = 0 .-,- N 0 M O M M 00M,0 O mO O O 4 0 0 001 6664 a m m m fDrO N Qmm a,O O_o o N 0000N 000. .0 M M M Q p p Nr,/pp. mmrmm O N M M Q m m.- 0 '--- O1 ,T m T a, m m al al m m m m m m 0.000 000,- N W m M O o TO ul O 01 N O J W O N N U q C N 0 M 0 N m 2 0 v-01 U, 2 m E 0 mN F 0 c E a 2g 2[1. 2g o 3 0 V O v P P v v e v N W Q W N W H 0 by Schlumberger WELL FIELD STRUCTURE Z-50 (P8b) Prudhoe Bay Unit-WOA Z-PAD Magnets ParemNers Surface Location NAD27 Alaska Stale Plane.Zona Od.US Feat Macellsrons Model BGGM2011 DT: 80.98• Data'. January 01.2012 tat. N 701751.638 Noairg: 5959100 19 BUS Grid Cone 076112351• Slat Z.50(SA) ND Ref: Rotary TaNe(9.58 above MSL) May Des: 20.993• FS: 576487n Lon: W 14911 29.591 Fasting' 599831 028115 Scab Fact 09991132 Plan: Z-50(P816 06 5ry Dae'Angue112.2011 1500 2000 2500 3000 0 50(P8b)v6 Fault 2 • • 8500 "' _.._ _.._.. .. �.._.._.._.._.._. 8500 0 RTE � _.._.._. .._.. Z-;SO Tat 1•SaA_.._.._.._.._..a.._.._.._.._.._.._.._.._..a.._.._.._.._.._.._.._.._..�.._..-.._.._.._.._.._.._ _.._.._.. B _...{.._.._.._.._.._.._.._.._..y.._.._.._.._.._.._.._.._..}.._.._.._.._.._.._.._.._..�.._.._.._.._.._.._.._.._ Cor 10.75/100 �.._.._.. _.._.._.._ .♦ _..y.._.._.._.._.._.._.._.._..y.._.._Fadt3.._..fdYigt.3i.._.._.._.._.._.._.._.._..�.._.._.._.._.._.._.._.._ CL 4/A..-.._.._.._.._.._.._.._.._..y.._.._.._.. ._.._.._.._.. .._.._.._.._.._.._.._.._..-.._.._.._.._.._.._.._.._ : Cry 8/100 End Cry • KOP Bld 1//5/100 _ - .11_ :.::•,,M1111••••••••••1.1•1..1•1811;8•1.1•1111•1� - _ ..r •.: •i!! a■a niu Bid 2/100 !l....ou.uuat.ii�ii t t •-• uttlulnluliiZ(i.u■n.uE : ; uuauumau _.._.._..— Y6_.._..� 9000 s , r.r.. 9000 1200 0 End Cry • Cry2/100 Z50 Tgt 2 TD Z-50(P8b)v6 _.._.._.._ 1500 2000 2500 3000 2400 aa^- ~••r ° ;. Vertical Section(ft)Azim=246.62°,Scale=1(in):500(ft) Origin=0 N/-S,0 E/-V • 9-5/8••Cs. Cry 4/100 3600 3600 FauE 0 _.._.._.._._.._.. Vii.._.._.._.._.._._.._.._.._.._.._ 0 N 1!!!311!:ii:l.._ .._.._.._.._.•l,Sl.._.._.._.._.._ :••:••:••-•::::i.:::::::::::::::: Top Overpressure _.._.._.._•._.._.. Ham._.._.._.._..:._.._.._.._.._.._ Cry 4/100 n■ i" 3ytt-tl-at_tat-t4/— -1t. _ 7200 7200 End Cry Fault 2 cry 1o.7u1oo _.._.._ �. nv To '1A CI Z-50(P8b)v6 !!1111111111111111111111111111111111111111 11 "I ■nuluu.0 Ult.uhluuUu.u.u.unuu 0 1200 Vertical Section(ft)Azim=246.62°,Scale=1(in):1200(ft) Origin=0 N/-S,0 E/-V COIMO ■ - | ■ 3 = 1\ ° 7_v. E � -5 B 2 || '• ■ CM a �& 2 tel § I ! .(k to 0 _ ° ) i!! } ) !' I <I •a� al j§! !§/ LP f,2 3 . _ S � II \ ` TO � §/ ; 2. m !� 4 • \ 7 �! - \ S \ '� ° \ ) / ' ! 3 < � § :. el k -� . , ff. , tr) UD CLO :: � _ ., a I . o - N ! . 1 \� E ; k «< N +m$(W[=oleos S », I _ o _Cr, -- o —o -- o —o 0 - O Na N _ 0 C —co % r4 N - �_._ - 0 ...�- N _o>, p p ,- CO Lo u>mN N - ta>N* 0) tQi - o �NCCC N -n 2mmcaco - 0-a.aaa _ - _ v- NoO) - o _ '- p N Cr, to N R - e a a d _I 1.12v 0 —8 7 . - � —8 co —- g C- —o tt0 —o N _- o �d 8 —8 C a a u Ci —o G _ N Fe 2 C B O ? —o W - iiir , iii ' iiil ' rlil ' iriri , , viiiii11111 , , , I , , , , i , iiri , ri , IiiiiiiiiiLrrr - O 0 b 0 in 0 to O 0 b 0 O O o h f.- CO CO I[) b V 01 P) N N ..- (uyll 00 uogWedag anuao of anua3 BPPASSPORT Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Site PB Z Pad Project: Prudhoe Bay TVD Reference: Z-50 plan D14 @ 90.50ft(Doyon 14) Reference Site: PB Z Pad MD Reference: Z-50 plan D14 @ 90.50ft(Doyon 14) Site Error: 0.00ft North Reference: True Reference Well: Plan Iv'Z-50(SA)v6 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan Z-50 Database: EDM.16-ANC Prod-WH24P Reference Design: Plan#8 Z-50 v6 Offset TVD Reference: Offset Datum Reference Plan#8 Z-50 v6 Filter type: GLOBAL FILTER APPLIED:All wellpaths within 200'+100/1000 of refer Interpolation Method: MD Interval 5.00ft Error Model: ISCWSA Depth Range: Unlimited Scan Method: Tray.Cylinder North Results Limited by: Maximum center-center distance of 1,312.97ft Error Surface: Elliptical Conic Survey Tool Program Date 8/12/2011 From To (ft) (ft) Survey(Wellbore) Tool Name Description 34.30 500.00 Plan#8 Z-50 v6(Plan Z-50) GYD-GC-SS Gyrodata gyro single shots 500.00 2,000.00 Plan#8 Z-50 v6(Plan Z-50) MWD MWD-Standard 500.00 3,195.13 Plan#8 Z-50 v6(Plan Z-50) MWD+IFR+MS MWD+ IFR+Multi Station 3,195.13 4,700.00 Plan#8 Z-50 v6(Plan Z-50) MWD MWD-Standard 3,195.13 9,040.60 Plan#8 Z-50 v6(Plan Z-50) MWD+IFR+MS MWD+ IFR+Multi Station 9,040.60 10,540.00 Plan#8 Z-50 v6(Plan Z-50) MWD MWD-Standard 9,040.60 11,164.02 Plan#8 Z-50 v6(Plan Z-50) MWD+IFR+MS MWD+ IFR+Multi Station 8/12/2011 2:24:36PM Page 2 of 5 COMPASS 2003.16 Build 73 BP PASSPORT Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Site PB Z Pad Project: Prudhoe Bay TVD Reference: Z-50 plan D14 @ 90.50ft(Doyon 14) Reference Site: PB Z Pad MD Reference: Z-50 plan D14 @ 90.50ft(Doyon 14) ,z Site Error: O.00ft North Reference: True Reference Well: Plan Ivi Z-50(SA)v6 Survey Calculation Method: Minimum Curvature Well Error: O.00ft Output errors are at 1.00 sigma Reference Wellbore Plan Z-50 Database: EDM.16 ANC Prod-WH24P -, Reference Design: Plan#8 Z-50 v6 Offset TVD Reference: Offset Datum Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well-Wellbore-Design (ft) (ft) (ft) (ft) EX HIGHLANDST HIGHLANDST-HIGHLANDST-HIGHLANDST Out of range PB Z Pad Plan Ivi Z-34(SM)v6-Plan Z-34-Plan#8 Z-34 vi 986.54 995.00 292.63 15.61 277.03 Pass-Major Risk Plan Ivi Z-40(SI)v6-Plan Z-40-Plan#13 Z-40 v 589.70 590.00 150.79 9.97 140.84 Pass-Major Risk Plan Ivi Z-51 (NA)v6-Plan Ivi Z-Z51 -Plan#2 Z-t 557.75 550.00 141.34 8.90 132.44 Pass-Major Risk Plan Ivi Z-55(SB)v6-Plan Z-55-Plan#4 Z-55 vE 722.15 720.00 15.81 11.88 3.94 Pass-Major Risk Plan Ivi Z-57(ND)v6-Plan Z-57-Plan#4 Z-57 vi 563.00 555.00 149.70 9.93 139.77 Pass-Major Risk Plan Ivi Z-61 (NF)v6-Plan Z-61 -Plan#4 Z-61 vE 568.00 560.00 170.84 9.99 160.85 Pass-Major Risk Plan Ivi Z-62(NC)v6-Plan Z-62-Plan#2 Z-62 vi 874.81 870.00 115.10 12.09 103.16 Pass-Major Risk Plan Ivi Z-65(SE)v6-Plan Z-65-Plan#13 Z-65% 869.37 870.00 75.68 13.66 62.02 Pass-Major Risk Plan Ivi Z-66(SC)v6-Plan Z-66-Plan#14 Z-66 i 674.56 675.00 29.64 11.81 17.83 Pass-Major Risk Plan Ivi Z-69(NJ)v6-Plan Z-69-Plan#3 Z-69 v6 663.00 655.00 222.37 11.16 211.21 Pass-Major Risk Plan Ivi Z-70(SF)v6-Plan Z-70-Plan#6 Z-70 vE 561.86 560.00 90.84 9.94 80.92 Pass-Major Risk Plan Kup Z-115(NG)v6-Plan Z-115 w/PH-Plan 410.29 410.00 180.44 7.79 172.65 Pass-Major Risk Plan Kup Z-115(NG)v6-Plan Z-115 wo/PH-Pla 410.29 410.00 180.44 7.63 172.80 Pass-Major Risk Plan Kup Z-115(NG)v6-Plan Z-115PB1-Plan# 410.29 410.00 180.44 7.79 172.65 Pass-Major Risk Plan Sch Z-202(NB)v6-Plan Z-202-Plan#2 Z-2 4,766.77 7,815.00 134.45 93.49 42.84 Pass-Major Risk Plan Sch Z-211 (SJ)v6-Plan Z-211-Plan#5 Z-2 802.93 795.00 165.57 12.91 152.66 Pass-Major Risk Plan Sch Z-214(SK)v6-Plan Z-214-Plan#2 Z-2 397.99 390.00 180.80 7.40 173.40 Pass-Major Risk Plan Sch Z-215(SH)v6-Plan Z-215-Plan#2 Z-2 407.99 400.00 120.82 7.57 113.25 Pass-Major Risk Plan Sch Z-216(NI)v6-Plan Z-216-Plan#2 Z-2 383.00 375.00 211.30 7.12 204.18 Pass-Major Risk Plan Sch Z-218(NE)v6-Plan Z-218-Plan#2 Z-2 487.99 480.00 162.91 8.73 154.17 Pass-Major Risk Z-01-Z-01-Z-01 3,882.89 3,915.00 425.02 60.75 364.69 Pass-Major Risk J/ Z-01-Z-01A-Z-01A 3,882.89 3,915.00 425.02 60.75 364.69 Pass-Major Risk Z-01-Z-01APB1-Z-01APB1 3,882.89 3,915.00 425.02 60.75 364.69 Pass-Major Risk Z-01-Z-01APB2-Z-01APB2 3,882.89 3,915.00 425.02 60.75 364.69 Pass-Major Risk Z-01-Z-01 B-Z-01 B 3,882.89 3,915.00 425.02 60.75 364.69 Pass-Major Risk Z-02-Plan Z-02B-Plan#3 3,841.44 3,840.00 506.50 63.94 442.73 Pass-Major Risk Z-02-Z-02-Z-02 3,842.32 3,850.00 506.50 64.05 442.62 Pass-Major Risk Z-02-Z-02A-Z-02A 3,844.63 3,845.00 506.50 64.05 442.62 Pass-Major Risk Z-03-Z-03-Z-03 3,684.58 3,760.00 194.54 70.54 125.34 Pass-Major Risk Z-03-Z-03A-Z-03A 3,684.58 3,760.00 194.54 70.49 125.34 Pass-Major Risk Z-04-Z-04A-Z-04A 3,299.76 3,265.00 616.94 50.26 566.71 Pass-Major Risk Z-06-Plan Z-06A-Plan#11 Z-06A 2,940.49 2,900.00 684.85 46.12 638.74 Pass-Major Risk Z-103-Z-103-Z-103 2,838.81 2,935.00 140.99 47.35 95.31 Pass-Major Risk Z-103-Z-103PB1 -Z-103PB1 2,838.81 2,935.00 140.99 47.35 95.31 Pass-Major Risk Z-103-Z-103PB2-Z-103PB2 2,838.81 2,935.00 140.99 47.35 95.31 Pass-Major Risk Z-11-Z-11-Z-11 3,958.70 3,995.00 101.98 67.15 35.48 Pass-Major Risk Z-11-Z-11A-Z-11A 3,958.70 3,995.00 101.98 67.26 35.37 Pass-Major Risk Z-112-Z-112Z-112-Z-112-Z-112 6,535.52 7,360.00 309.77 73.99 235.75 Pass-Major Risk Z-112-Z-112PB1 -Z-112PB1 6,535.52 7,360.00 309.77 73.89 235.85 Pass-Major Risk Z-112-Z-112PB2-Z-112PB2 6,535.52 7,360.00 309.77 73.88 235.86 Pass-Major Risk Z-113-Z-113-Plan#7 Z-113 v6 400.19 400.00 189.95 7.62 182.33 Pass-Major Risk Z-113-Z-113-Z-113 34.50 34.50 189.14 0.91 188.23 Pass-Major Risk Z-113-Z-113PB1 -Plan#9 Z-113PB1 v6 400.19 400.00 189.95 7.62 182.33 Pass-Major Risk Z-113-Z-113PB1 -Z-113PB1 500.12 500.00 189.08 7.90 181.18 Pass-Major Risk Z-12-Z-12-Z-12 4,465.05 4,495.00 111.61 71.45 40.65 Pass-Major Risk Z-13-Z-13-Z-13 1,988.22 1,980.00 246.51 34.03 212.54 Pass-Major Risk Z-13-Z-13A-Z-13A 1,987.21 1,970.00 246.49 33.93 212.62 Pass-Major Risk Z-13-Z-13APB1 -Z-13APB1 1,987.21 1,970.00 246.49 33.93 212.62 Pass-Major Risk Z-14-Z-14-Z-14 1,966.04 1,960.00 209.51 35.32 174.30 Pass-Major Risk Z-14-Z-14A-Z-14A 1,966.04 1,960.00 209.51 35.47 174.14 Pass-Major Risk 8/12/2011 2:24:36PM Page 3 of 5 COMPASS 2003.16 Build 73 BPPASSPORT Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Site PB Z Pad 4 Project: Prudhoe Bay TVD Reference: Z-50 plan D14 @ 90.50ft(Doyon 14) Reference Site: PB Z Pad MD Reference: Z-50 plan D14 @ 90.50ft(Doyon 14) ik Site Error: 0.00ft North Reference: True Reference Well: Plan Ivi Z-50(SA)v6 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan Z-50 Database: EDM.16-ANC Prod-WH24P Reference Design: Plan#8 Z-50 v6 Offset TVD Reference: Offset Datum Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well-Wellbore-Design (ft) (ft) (ft) (ft) PB Z Pad Z-14-Z-14B-Z-14B 1,965.53 1,950.00 209.50 35.46 174.14 Pass-Major Risk Z-15-Z-15-Z-15 1,647.90 1,655.00 173.99 29.48 144.65 Pass-Major Risk Z-16-Z-16-Z-16 1,307.15 1,295.00 161.29 30.27 131.45 Pass-Major Risk Z-16-Z-16A-Z-16A 1,307.15 1,295.00 161.29 30.32 131.41 Pass-Major Risk Z-17-Z-17-Z-17 2,235.98 2,250.00 69.66 43.15 27.81 Pass-Major Risk Z-18-Z-18-Z-18 1,342.62 1,345.00 54.07 27.51 27.07 Pass-Major Risk Z-19-Z-19-Z-19 776.99 775.00 74.52 17.92 56.60 Pass-Major Risk Z-19-Z-19A-Z-19A 776.34 770.00 74.50 17.95 56.55 Pass-Major Risk Z-20-Z-20-Z-20 1,234.87 1,235.00 37.66 19.83 17.84 Pass-Major Risk Z-23-Z-23-Z-23 1,283.81 1,295.00 456.28 22.80 433.50 Pass-Major Risk Z-23-Z-23A-Z-23A 1,265.15 1,265.00 455.27 19.68 435.60 Pass-Major Risk Z-23-Z-23B-Z-23B 1,268.52 1,270.00 455.33 19.74 435.60 Pass-Major Risk Z-33-Z-33-Z-33 10,400.00 9,300.00 531.01 182.63 376.17 Pass-Major Risk Z-33-Z-33A-Z-33A 5,817.73 5,815.00 701.93 65.02 636.92 Pass-Major Risk Z-39-Z-39-Z-39 2,880.48 2,910.00 60.97 52.08 10.10 Pass-Major Risk Z-39-Z-39A-Z-39A 2,880.48 2,910.00 60.97 52.11 10.06 Pass-Major Risk / Z-46-Z-46-Z-46 536.01 530.00 91.33 8.88 82.52 Pass-Major Risk ,/ Z-46-Z-46A-Z-46A 536.01 530.00 91.33 8.93 82.48 Pass-Major Risk Z-67-Z-67-Z-67 1,706.10 1,615.00 934.69 28.47 906.93 Pass-Major Risk 8/12/2011 2:24:36PM Page 4 of 5 COMPASS 2003.16 Build 73 Project: Prudhoe Bay Site: PB Z Pad Well: Plan Ivi Z-50 (SA)v6 From Colour To MD Wellbore: Plan Z-50 Design: Plan#8 Z-50 v6 34 500 500 1000 1000 1500 From Surface to 9-5/8" 1500 2000 Scan interval 100 ft 2000 3000 Scale 1 : 50 3000 5000 All wells pass major risk 0 5000 –, 7000 _r— 17C-60"------6 -�, 002 7000 9000 2 . \ 9000 11200 330 90.1_11.7,,,'> 507 1 � z �!p 30 _. — J 108 707 72624 707.6'0 .7.. . — 1689 �- ' 12---� 1195 1R _,�4jl"�-. IFR17.- 1585 ���1�` Rd1 Ltlibt. / 300 .!};.,:''.. N - 1692 60 180 •702 /' . 1 '093 ` 1 98 / 7at4"--, / / /609 .,,...--------'-7t4"----_, al ' q y 2877_ 71 rAlq •�1505 - 1\, C4 n 2: 11;5 < :99 I /1407 \ /197 ', ,� ' / 1/ / 23 �t,5 I 1299 l 1 98 707 2 �� � 4' 20iii / / 12 / AAA, 1001 I ! ° 1101Y + :a7 270faaPisr40105 l •'" -Y 1 " ` ' .: 9'�so 6i g�3 i 1 01 apor .4:4,.1...;:: ��s�•Au g, l 50, �02 \ 2 A��I..4r 1 1 10411 ,. 904 ` 1201 AWAIT., bag \ WA,4k 100 5nc 9 �°`.,K � \ \ 51 ,. ,.\ ..1 797 111 \ \ '9 / /���sAi ---r797 iv z \ ���_ -- 1201 _r ,�,�� �fr®�;4TR'2 *A/ 240 688 1s. . • i "�14 1r !. 120 \ I ` 387 2238 ''�I'•878 ' kplilk • ,197 -�It I k h -wall� .� ► 1298 1 0 Ili opr- 210 �!!' ' ��� � 150 '*7"41146\,.. ,A r 180 Travelling Cylinder Azimuth (TFO+AZI)[°]vs Centre to Centre Separation [50 ft/in] Project: Prudhoe Bay Site: PB Z Pad Well: Plan Ivi Z-50(SA)v6 From Colour To MD Wellbore: Plan Z-50 Design: Plan#8 Z-50 v6 34 500 500 1000 1000 1500 From 9-5/8"to 7" 1500 2000 Scan interval 100 ft 2000 3000 Scale 1 : 50 3000 5000 All wells pass major risk o 5000 7000 17 7000 9000 9000 11200 330/ 30 4415o 441 1111 _ --.0� %� 1i� 300 4295 •,' 60 r 3791 ,' �� 75 411111P r�' T / 5' I., )131z270) qI4i `, , + ,i4 90 Asp .tp----vP4 *--..itatN,, 4- 5' I 411111PP: 11W-%.4 Ali .410-e.410.* * 1111100. +NM i t I CA..- 1111 A. fig 240 � 0. . . 120 -.11`4011140010101411, 101 "Nr .. 1 iiii4 - � „A� 150 210 ' !�'�`�S� 150 r 180 Travelling Cylinder Azimuth (TFO+AZI)ri vs Centre to Centre Separation[50 ft/in] . • Project: Prudhoe Bay Site: PB Z Pad Well: Plan lvi Z-50 (SA) v6 From Colour To MD Wellbore: Plan Z-50 Design: Plan #8 Z-50 v6 34 500 500 — 1000 1000 — 1500 1500 — 2000 From 9-5/8" to 7" Scan interval 100 ft 2000 3000 Scale 1 . 50 3000 5000 All wells pass major risk o 5000 7000 175 7000 9000 9000 11200 - , 330 30 -------1: -- , .----- ------ 4k. 300 . . \ \\ \A \ 270 90 -It- / f-\ /7 II 120 , / / -i ---/--- ._ 210 150 ---- 175 180 Travelling Cylinder Azimuth (TFO+AZI)[°] vs Centre to Centre Separation [50 ft/in] lb ' II' 1! 1 .: 0 - :ti 0 I khh gi Sp O 0 m ` > _ 0- "::: : N•M7 d N•10 h r. 0 111 790 ,c; _ , gggggft 11 41H- :a L,_ - _,E.,E:1 1 i .. �� a ....___,_ „ „. .,..,,,_ ;ii jl c 5 fh "; 1te 111 •- 1 nU 1 1 ! ! IgE - II 11 Ai• i - Z ffi illi - V Q ,es> • /ISIII Noma 0 c. . III 111 ■=A a ! ( a i 1 ial R E 'VI / I 0. u i ii 1 S. i . . likk 4r ic., o' +.+ d To > a N _ ig 7.01- 0 a > C o N 5 0 p °' Q > c0 U cFN z = o LU co > � >,0 _ co co 7-0o It f Y' Q E 1E L Q W 2 00 a; J c1 ED i ,► r GI .r i ,t 1 4, •c E of IVa � 0 8 .r V _ riik..... .V � _ all o yr o .. • Po We© . .r r t m m j / �� O lit o 2 > > CD (/) oy A J «. Em = c 2 J 'a °CL Q — N9 ° M 2 m W 0C) Po m ;•.-- cQ MS M N M G CIDE G v trimm m a m ..r N IL .�,1 \ 4' `* V PAD .''1, 1 l ,' 1� .V Lumi......i. - '' t I r4, t...,, ,.., GRID i 1 • '} 'F, � f i . , •` ; ;SPINE RD ;,; ; :" k l,} + \�'i 7 ■ ■ 31 Vill '1 ± \V W-PAD 6 ■ ■ 30 II, ,— Aty 112 ■ , g.1fZ-PAD 1I5 ■ ■ 29 1104 I • 28 .h021 t ,'Tim 3 ■ i 27 ,.` THIS PROJECT2 ■ 1041 ° !1141S�5III 1031 j ¢' } 1 ■ ■ SPARE-A ® ■ P-504A .;' ' # _.. ■ P-5046 � t.,,, i Big - VICINITY MAP (� 0 NTS l ■ 21 ■ 22 39 ■ ■ 23 11 ■ ■ 24 12 ■ ■ 25 13 I 14 ■ ■ 26 15 ■ III SLOT 1 : 1011 r �G 0 A4 1,, .���' i 17 ■ ■ 101 4 .�a� '�� SURVEYOR'S CERTIFICATE. 18 • -� , 4 ~Lid ,,�'1 * I HEREBY CERTIFY THAT I AM E 46 • Z_ I PROPERLY REGISTERED AND LICENSED 19 -PAD "` TO PRACTICE LAND SURVEYING IN 20 ■ : i �` - "��. r Z— ThEPAAS-BUILT REPRESENTS A SURVEY MADE BY ME OR UNDER MY DIRECT ' 511 m` "'chord AllisonTHAT ALL A, DIMEN SION ISUPERVI ONS ANDD OTHER DETAILS ARE 66 202 rf50 CORRECT AS OF JULY 02, 2011. II SD 57 ', ' 66 - 2181 ‘,");,,,_'0, „,„,,,,:,',,e)-,.-., 70 61 v it ES-Iit-IAO'' , �y 21 SGi - 113 2 M 240 161 69 SL El` 213i ■ 1 FT LEGEND 103 _ 2031• AS-BUILT CONDUCTOR gg 4121 1111EXISTING WELL CONDUCTOR 444 NOTES: 1 1. ALASKA STATE PLANE COORDINATES ARE ZONE 4. NAD 27. I 2. HORIZONTAL CONTROL IS BASED ON Z PAD CONTROL MONUMENTS MON 2 AND MON 3. 3. VERTICAL CONTROL IS BASED ON Z PAD MONUMENTATION. 4. ELEVATIONS ARE BPX MEAN SEA LEVEL (M.S.L.) DATUM. 5. GEODETIC DATUM IS NAD27. 6. PAD AVERAGE SCALE FACTOR IS 0.999911213. 7. DATES OF SURVEY: JUNE 28-30, JULY 1-2, 2011. 8. REFERENCE FIELD BOOKS: NS11-44 PGS, 1-75; NS11-46 PGS. 1-9, AS-BUILT WELL CONDUCTORS: ....•34i, 40, 42, 50, 511, 55, 57, 61, 62, 65. 66, 68, 69, 70, 105,'113, 115, 201, 202, 203, 2111, 212i, 2131. 2141, 2151, 2161, 217i, 2181, SD, SG, SL, NK IaAw BARNHART . _ I. Robert : u 4,4 ` a h JAPES p , ._.».... a„7,1,11 ,041.. 6 � FRB11 WOZ 21 .4kEE7. � WOA Z—PAD fSSUC$ WRD PAD EXPANSION dJ 177/11 ISSUED FCR INFORMATION - T 118 .1.1M o,”NO WO govreats '� 1T zee' AS—BUILT WELL CONDUCTORS 1 OF 3 I .,.. QY C,* meow..Luau seu LOCATED WITHIN PROTRACTED SEC. 19, T. 11 N., R. 12 E., UMIAT MERIDIAN, ALASKA WELL A.S.P. PLANT GEODETIC GEODETIC CELLAR SECTION NO. COORDINATES COORDINATES POSITION(DMS),POSITION(D.DD) BOX ELEV. OFFSETS Y= 5,959,100.13 N= 1,179.09 70'17'51.597" 70.2976658' 4,292' FSL 341 X= 600,125.84 E= 1,870.12 149°11'20.998", 149.1891661° 56'1' 2,552' FEL y= 5,959,100.17 N= 1324.00 70°17'51.616" 70.2976711' 4,294' FSL 40 X= 599,980.94 E= 1870.16 149°11'25.221" 149.1903392° 56'0' 2,697' FEL Y=5,959,239.95 N= 1,126.45 70'17'52.965"i 70.2980458' 1 4,431' FSL 42 X= 600,178,47 E= 2.009.96 149'11'19.409"1 149.1887247' 56'0 2,497' FEL Y= 5,959,100.19 N= 1,473.93 70'17'51.636" 70.2976767' 4,296' FSL 50 X= 599,831.02 E= 1,870.18 149'11'29.591" 149.1915531' S6'2 2,847' FEL Y=5,959,240.04 N= 1,466.46 70°17'53.011" 70.2980586' 4,435' FSL 511 X= 599,838.49 , E= 2,010.05 149'11'29.319" 149.1914775' 55.9' 2,837' =EL Y= 5,959,100.12 N= 1,458.95 70'17'51.634" 70.2976761' 4,295' FSL 55 X= 599,846.00 �E= 1,870.11 149'11'29.155" 149.1914319' 56.1' 2,832' FEL 57 Y=5,959,240.04 N= 1,421.49 70'17'53.005" 70.2980569' 55.9' i 4,435' FSL X= 599,883.46 E= 2,010.05 149'11'28.009" 149.1911136' , 2,792' FEL 61 Y=5,959,239.97 ' N= 1,376,44 70'17'52.998"1 70.2980550' 1 _ 4,434' FSL X= 599,928.50 E= 2,009.98 149'11'26,695" 149.1907486° 55'� .2,747' FEL Y=5,959,239.94 N= 1,436.45 70'17'53.006" 70.2980572' '4,435' FSL 62 ,X= 599,868.50 E= 2,009.95 i 149'11'28.445" 149.1912347' 56'0' 2,807' FEL 65 Y= 5,959,100.15 N= 1,398.94 70'17'51.626" 70.2976739' 4,295' FSL X= 599,906.01 1 E— 1,870.14 ; 149'11'27.405"; '149.1909458° 56.1' 2,772' FEL 66 Y= 5,959,100.11 N= 1,443.99 70'17'51.632" 70.2976756° ( 56.2' 4,295' FSL X= 599,860.96 E= 1,870.11 149°11'28.719" 149.1913108' i 2,817' FEL Y=5,959,100.23 N= 1,134.00 I 70'17'51.592" 70.2976644' 4,291' FSL 68 X= 600,170.92 E= 1,870.22 I 149'11'19,683" 149.1888008' , 55.9' 2,507' FEL Y=5,959,239.94 N= 1,30`.49 70'17'52.988" 70.2980522° 4,433' FS'_ 69 X= 600,003.45 E= 2,009.95 149'11'24.511" 149.1901419' 56'1' 2,672' FEL Y= 5,959,100.10 �N= 1,384.02 70'17'51.624" 70.2976733° 4,294' FSL 70 X= 599,920.93 E= 1,870.09 149'11'26.971" 149.1908253' 56.2' 2,757' FEL Y=5,959,100.05 N= 1,163.88 70'17'51.594", 70.2976650' 4,291' FSL 105 X= 600,141.04 E= 1,870.04 149'11'20.554"1 149. 1890428' 55'9 2,537' FEL Y=5,959,239.90 N= 1,346,45 70'17'52.994" 70.2980539' 4,434' FSL 113 X= 599,958.49 ,E= 2,009.91 149'11'25.821"' 149. 1905058' 56.0' 2,717' FEL Y=5,959,240.03 N= 1,361.38 1 70'17'52.997" 70.2980547' 4,434' FSL 115 X= 599,943.56 E= 2,010.04 149'11'26.256" 149.1906267' 55°9 2,732' FEL NOTFS: 1. ALASKA STATE PLANE COORDINATES ARE NAD27, ZONE 4. 2. HORIZONTAL CONTROL IS BASED ON Z PAD CONTROL MONUMENTS MON 2 AND MON 3. 3. VERTICAL CONTROL IS BASED ON Z PAD MONUMENTATION. 4. ELEVATIONS ARE BPX MEAN SEA LEVEL (M.S.L.) DATUM. 5. PAD AVERAGE SCALE FACTOR IS 0.999911213. AS-QUILT WELL CONDUCTORS: 34i, 40, 42, 50, 51i, 55. 57. 61. 62, 65, 66, 68, 69, 70, 105. 113. 115. 201, 202, 203, 2111, 212i, 2131. 214i. 2151. 2161, 217i, 218i, SD, SG, SL, NK fUNAm 1' Robert BARNHART f bp 4 G"7 c41°JACOBS , _,. _.. ___.._._ ._ DAk via FRe11 WOZ 21 WOA Z PAD Frim OSSOC. MoD" WRD PAD EXPANSION OSSOC. 0B 7/1 jt 7.ISSUED FOR INFORMATION iTF9 JJ 'M"TOAS AS—BUILT � ::',..7,..."=“1:— , �� 1' = 200' WELL CONDUCTORS z I Dr ; ..on,.a. .ua. , LOCATED WITHIN PROTRACTED SEC. 19, T. 11 N., R. 12 E., UMIAT M[RO]IAN, ALASKA WELL A.S.P. PLANT GEODETIC GEODETIC GRAVEL ' SECTION NO. COORDINATES COORDINATES POS{770N(DMS\ P0SITl0N(D�DD)i PAD ELEELEV. 0FFGET3 Y=5'Q5g.24018 N= 1,171.46 70l7'52Q7J^ 702g80481' 4,432' FSL 201 . ' . ' 56.6' X= 600,133.47 E= 2,010.19 1491120.721 149.1890892' 2,542' FEL Y=5,959,239.94 N= 1,451.46 7077'5J008^ 70 �Q8057D' 4.435' FSL 202 ' ' .| ' 55.9' X= 599.853.49 E= 2,009.95 l4Q�1 28.882'/ l4Q1Q13551' 2,822' FEL ' | Y=5.S59.100�03 N~~ 1.14OA5 70l751 5S2^ 702y7OO44' . 4,291' FSL 203 � . .� � 5G0 ' X� 600,155.96 E= 1'87002 14Q�12011S 14Q1B8A21Q^ ' 2.522 FEL Y=5.959.100�23 N= 1,308.95 70l7'51G15^ 70i2976708` 4,293' FSL 211i X= 599,995.99 E= l 8702� l4y�1'24'783^� 149.1902175' 55.9' 2682' FEL ' � ' � � ^ Y= 5'A50.24011 N= 1,141.47 70�7'52AGQ^ 702�804GQ^ 4,431' FSL 212i � ' | � 56.4'' X= 600,163.45 E= 2.010[12 149'11'19.847"/ 149 1888464' 2,512' FEL Y=5,959,240.04 N= 1,271.44 70'17'52.985" 70.2980514' . 4'433' FSL 2131 X= 600,033.50 E= 2,010.05 149'11'23.635"� 149]8g8A8S^ 56'1 2'642' FEL Y=5,959,100.25 N= 1.20J�O8 7017'51.613" 70 �Q7S70J' . 4,293' FSL 2l4i . .| � 5S2 . X= 600'01106 E= 1'87024 l4&l124.�4J | 149]800853^ ' 2'667FEL Y=5,959,100.14 N= 1.J54.05 � 70'17'51.620'�02�~/ 702976722' . 4.2Q4' FSL 215i5� 2 ' X= 589'950.89 E= 1,870.13 14811.2S.0Q7. 149.1905825' � � 2.727`FEL Y=5,959,240.09 N= 1,316.42 70l7'52AQ2^ 70.2980533' 4.433FSL 216i . ' . 56.0 X= 509.988.52 E= 2,010.10 14Q11 24.g4G 149.1902628' . 2,687' FEL Y=5.Q5Q.23Q�QO N= 1,156.36 7017'52Q7@^ 702Q80472' . 4,431' FSL 217i . . ' 56.2 ' X= 600148.56 E= 2^008.99 I l49l1 ��2O1 14Q1D8QGGQ' ) ' 2^527 FEL Y= .g5y.23Q�Q8 N= 1,391.46 7077'5J000^ rQ.288055G^ � 4,434' FSL 218i . ' " 55.9' ' X= 599.913.48 E= 2.009.99 � 14gl127133^ 149,1g08703` .2'752 FEL Y= 5.y5010011 N= 1.428�03 70l7'518J0^| 702O7O750^ . 4,295' FSL 3D ' . . ' 504[ . X= 5QS.O7�iQ2 E= 1'87010 14Q' 128283 | 14g1011O07^ � 2'802 FEL Y=5`S5Q'10000 N= 1,369.02 7077'5l�O21^ 70.2976725' � . 4,294' ESL 5G 5O2 X= 599,935.92 E= 1'870i08 l49l1.2G.533.� 149.1907036' 2,742'2.742. FEL Y= 5,959,100.01 N= 1,279.00 � 7077'51 G0Q^| 702076692. 4,293' FSL SL . � . 56.3' . X= 600'02594 E- 1,870.00 ] 14A712JQ10 14818QQ750` / 2.652FEL Y=5.&50.23g.85 N= 1,286.54 7077'5�lQ85^ 7(-2Q805l4` 4^433 FSL NK ' " 5O0� |X= 600'018.40 E= 2.009.86 14g�124.075149.1900208' | . 2,657' FEL NOTES: 1. ALASKA STATE PLANE COORDINATES ARE NAD27. ZONE 4. 2. HORIZONTAL CONTROL IS BASED ON Z PAD CONTROL MONUMENTS MON 2 AND MON 3. 3. VERTICAL CONTROL IS BASED ON Z PAD ucwuwswn^now. 4. ELEVATIONS ARE opx MEAN SEA LEVEL (M.S.L.) DATUM. 5. PAD AVERAGE SCALE FACTOR IS 0ye9911213. 6. ALPHA NAME DESIGNATIONS REFER TO BPX DRILLING SURFACE SLOT NAME n� 40, 42, � m� � 57. 61, � 65. 66, � e� � 1� n� 115, mm. 202, 203, on 212i, 213i, o* 2151 2161, 2171, 218i, SD, SG, SL, NK ^m°° e�wa�r f �� U� -------- JACOBS uU� n- ~I<�` � -*EI� ��m WOA Z-PAD Si l�� "� "" _ WRD PAD EXPANSION / FOR INFORMATION T"~ � 7° �wzr ~ �� AS-BUILT WELL CONDUCTORS � �� O 0 0 0 O co M O O N • o O O r 1` gt r I oQ ', /- :i NI ON s— ■1 • O W o L 1 O cu CT Q Q co a O W O O O O O O O O O O O O O O O Co O O O 0LO 0 O 0LO 0 O CO O O O O Land Administration System Page 1 of 11 0e�2laska I)cp arlm in of Natural R sources Alaska DNR Case Summary File Type:ADL File Number: 28262 See Township,Range,Section and Acreage? Yes No New Search Ill File: ADL 28262 '''alSearch for Status Plat Updates As of 01/05/2012 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E.BENSON BL ATTN:LAND MANAGER-ALASKA ANCHORAGE AK 995196612 Case Tljpe:784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status:35 ISSUED Status Date: 08/26/1965 Total Acres: 2480.000 Date Initiated:05/28/1965 Office of Primary Responsibility:DOG DIV OIL AND GAS Last Transaction Date:05/04/2009 Case Subtype: NS NORTH SLOPE Last Transaction:CHNGTEXT CHANGE LEGAL TEXT Meridian: U Township: o11N Range: o12E Section: 17 Section Acres:640 Search Plats Meridian: U Township: o11N Range: o12E Section: 18 Section Acres:599 �� 11 Meridian: U Township: o11N Range: 012E Section: 19 Section Acres:601 .- �4 Meridian: U Township: oN Range: 012E Section: 20 Section Acres:64o Legal Description 05-28-1965 m SALE NOTICE LEGAL DESCRIPTION*** C14-58 Ti 1N,R12E,UM 17,18,19,20 2,480.00 12-04-1969***ASSIGNMENT LEGAL DESCRIPTION*** SEGMENT 1 T1IN,R12E,UM SECTION 17:640 ACRES SECTION 18:599 ACRES SECTION 19:601 ACRES CONTAINING 1840 ACRES,MORE OR LESS. SEGMENT 2-LANDS ASSIGNED T11N,R12E,UM SECTION 20:640 ACRES CONTAINING 640 ACRES,MORE OR LESS. 04-01-1977***UNITIZED AND PA LEGAL DESCRIPTIONS*** TRACTS 54&54A COMMITTED TO THE PRUDHOE BAY UNIT AND THE OIL RIM& GAS CAP PARTICIPATING AREAS TRACT 54 T.11 N.,R.12 E.,U.M. SECS.17,18,19:ALL; 1 \ http://dnr.alaska.gov/projects/las/Case_Summary.cfm?FileType=ADL&FileNumber=28262... 1/5/2012 Land Administration System Page 1 of/ 4,1w,ka Dc uiru,cmt.01 Natural Resources ra DNR Case Summary File Type:ADL File Number: 28245 See Township,Range,Section and Acreage? Yes No New Search File: ADL 28245 Search for Status Plat Updates As of 01/05/2012 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E.BENSON BLATIN:LAND MANAGER-ALASKA ANCHORAGE AK 995196612 Case Type:784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status:35 ISSUED Status Date: 09/14/1965 Total Acres: 2560.000 Date Initiated:05/28/1965 Office of Primary Responsibility:DOG DW OIL AND GAS Last Transaction Date:12/04/2006 Case Subtype: NS NORTH SLOPE Last Transaction:AA-NRB ASSIGNMENT APPROVED Meridian: U Township: oliN Range: onE Section: 13 Section Acres:64o Search Plats Meridian: U Township: o11N Range: onE Section: 14 Section Acres:64o Meridian: U Township: o11N Range: 011E Section: 23 Section Acres:640 Meridian: U Township: o11N Range: onE Section: 24 Section Acres:640 Legal Description 05-28-1965***SALE NOTICE LEGAL DESCRIPTION*** C14-24 TuN,RuE,UM 13,14,23,24 2560.00 04-01-1977**UNITIZED,LEASE AND PAR TICIPA TING AREA LEGAL DESCRIPTION** LEASE COMMTII LD IN ENTIREIY It)PRUDHOE BAY UNHAND OIL RIM GAS CAP PA PRUDHOE BAY UNIT TRACT 53 OIL RIM AND GAS CAP PARTICIPATING AREAS T11N,R11E,UM SECTION13:ALL 64oACRES; SECTION14:ALL 64o ACRES: SECTION 24:ALL 64oACRES; CONTAINING 1,92oACRES,MORE OR LESS. ***7-1-00 ASSIGNMENT LEGAL DESCRIPTION*** SEGMENT 1,SAME AS PRUDHOE BAY UNIT Ti1N,RilE,UM SECTION 13:ALL,64o ACRES; http://dnr.alaska.gov/projects/las/Case_Summary.cfm?FileType=ADL&FileNumber=28245... 1/5/2012 OVERSIZED DOCUMENT INSERT This file contains one or more oversized documents. These materials may be found in the original hard file or check the parent folder to view it in digital format. TRANSMITTAL LETTER CHECKLIST WELL NAME Psl/ . S PTD# ��QT OO/ / Development Service Exploratory Stratigraphic Test Non-Conventional Well FIELD: ,�,C!/,LL�o1'/7,4r POOL: 'l�, 4 J W 0/4 Check Box for Appropriate Letter/ Paragraphs to be Included in Transmittal Letter CHECK ADD-ONS WHAT (OPTIONS) TEXT FOR APPROVAL LETTER APPLIES MULTI LATERAL The permit is for a new wellbore segment of existing well (If last two digits in Permit No. ,API No. 50- - - API number are between 60-69) Production should continue to be reported as a function of the original API number stated above. PILOT HOLE In accordance with 20 AAC 25.005(f), all records, data and logs acquired for the pilot hole must be clearly differentiated in both well name ( PH) and API number (50- - - ) from records, data and logs acquired for well SPACING The permit is approved subject to full compliance with 20 AAC EXCEPTION 25.055. Approval to produce/inject is contingent upon issuance of a conservation order approving a spacing exception. assumes the liability of any protest to the spacing exception that may occur. DRY DITCH All dry ditch sample sets submitted to the Commission must be in SAMPLE no greater than 30' sample intervals from below the permafrost or from where samples are first caught and 10' sample intervals through target zones. Non-Conventional Please note the following special condition of this permit: Well production or production testing of coal bed methane is not allowed for (name of well) until after (Company Name) has designed and implemented a water well testing program to provide baseline data on water quality and quantity. (Company Name) must contact the Commission to obtain advance approval of such water well testing program. Rev:9/09/2011 T n .1. 0 b 1'a 0 [7 S o m o � � ° (j) v. 3 cn 'a r m 30. .. o -. 5 _s d o m 0 O ccn 5. N c N w O N I1 c O E co 0 ID O• 0 • NN N _ _ ° n w Cal CO W CW W W W W W N N N N N N N N N N c0 co V 0) 01 A W N co co V 0) CTI A W N O Co CO V 0) 01 A W N -, 0 (0 OD 0) CT.A W N -. 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