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211-173
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-2292221045002923726003.8361.23/5/2023363/27/20230.700.7-5/27/2023Z-402111735002923462006 Image Project Well History File Cover Page XHVZE This page identifiesentifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. p2_I J - 73 Well History ile Identifier I Organizing (done) Two-sided ❑ Rescan Needed RES AN: OVERSIZED: NOTES: Co r Items: ❑ Maps: rayscale Items: gs: ❑ Poor Quality Originals: ❑ Other: ❑ Other: BY: Maria Date: & 3 / Is! a P Project Proofing BY: MaiCin.)___ Date: //I3 //q. /s/ rviio Scanning Preparation L3 x 30 = D + 7 = TOTAL PAGES (Count does not include cove s eet) BY: Date: g I /s/ u Production Scanning Stage 1 Page Count from Scanned File: (Count does include cover eet) q r Page Count Matches Number in Scanning Pr paration: t YES NO BY: AO Date: 03 1 /s/ vi4 e Stage 1 If NO in stage 1, page(s) discrepancies were found: YES NO BY: Maria Date: /s/ Stage 2 Additional Well Reports: YES NO TOTAL PAGES: Digital version appended by: Meredith Michal Date: /s/ Final Page Count: Stage 1 + Stage 2: TOTAL PAGES: Scanning is complete at this point unless rescanning is required. 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S. N bp BP Exploration(Alaska)Inc. Attn:Well Integrity Coordinator, PRB-20 Post Office Box 196612 Anchorage,Alaska 99519-6612 May 25, 2012 Mr. Jim Regg ar i - V 7 3 Alaska Oil and Gas Conservation Commission 333 West 7th Avenue 14--0 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, / 0 Mehreen Vazir BPXA, Well Integrity Coordinator 01, N BP Exploration (Alaska ) Inc. Surface Casing by Conductor Annulus Cement, Corrosion inhibitor, Sealant Top-off Report of Sundry Operations(10-404) Z-Pad Date:05/02/2012 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 dal Z-01B 2081080 50029218300200 Z-02A 1960430 50029218140100 7-03 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 7-11A 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-228 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 7-40 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 2-100 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 7-116 2111240 50029234550000 3.0 NA 3.0 NA 22.1 4/8/2012 4111 McMains, Stephen E (DOA) From: Lastufka, Joseph N (Northern Solutions) [Joseph.Lastufka@bp.com] Sent: Tuesday, May 22, 2012 2:24 PM To: McMains, Stephen E (DOA) Subject: PBU Z-40/PTD#211-173 Hi Steve, Please reference the following well: Well Name: PBU Z-40 Permit#: 211-173 API #: 50-029-23462-00-00 Date of Test: 5/19/2012 Type of Test: IPT(Initial Production Test) Choke Size: 96 Choke Unit: Degrees Production Method: Gas Lifted Duration (Hours Tested): 8 Top Reference (Top Perf MD): 9778' Bottom Reference (Bottom Perf MD): 11701' Tubing Flowing (Pressure): 900 Casing Pressure: 1440 Total Test(Rate f/O, W, G): 960/ 1042/ 1965 24-Hour Rate (0, W, G): 2880/3126/5895 Gravity (Oil, API): Not Available GOR (Gas-Oil Ratio): 2047 This well began Production on Method of Operations on this date: 5/19/2012 1 II in v1 v) a) a) a) a) a) a) L L L a) 4) 4-•I 01 F- a) 011- a) 01 F- -0 4- 4- EC-0 EC0 E c M HI 0 ,--I a1 NO • 0 0 0 0 0 E 01 Tf 0 0 •In 0 •Ln 0 • d•l7 "71- • 0 In 0 In 0 In 0 I l7 rI Wal •0 • .0 . •0 N CO I 000 0 Nre)0 NM0 NM .. .. .. .. .. .. .. .. .. .. .. .. .. .. 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MLn61MN00IOrl Ln rI l0 M co MrI10 NJ N NMM lOLOci- 1000O01N.rINNcr'Tro0(-0O I�Ni rl r•1 v") ,-I N 1.Cs 0 0 C▪ -IM MI CIis)O0iCCONJC 00x1 cr N O re)LO (NJ LnC NJ00 ▪ Lin Ln IO IO 10 N.N.N.N.0000 rl rl rI rI rl r-I rl 1-1 rl rl rl rI rl rlrlrlrlrlrlrlrlrlrlrlrlrl RECEIVED STATE OF ALASKA APR 3 0 2012 ALASKA OIL AND GAS CONSERVATION COMMISSION AOGCC WELL COMPLETION OR RECOMPLETION REPORT AND LOG VV la. Well Status: SI Oil • 0 Gas 0 SPLUG 0 Other 0 Abandoned 0 Suspended lb. Well Class: 20AAC 25.105 20AAC 25.110 IN 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. •,...--3/30/2012 211-173 • 3. Address: 6. Date Spudded: 13. API Number: P.O. Box 196612,Anchorage,Alaska 99519-6612 2/25/2012 • 50-029-23462-00-00 ' 4a. Location of Well(Governmental Section): 7.Date T.D.Reached: 14. Well Name and Number: Surface: 3/23/2012 ' PBU Z-40 • __ 4294'FSL,2697'FEL,Sec. 19,TI 1 N, R12E, UM 8. KB(ft above MSL): 89.4' • 15.Field/Pool(s): Top of Productive Horizon: GL(ft above MSL): 56' • Prudhoe Bay/Prudhoe Bay - 974'FSL,2565'FEL, Sec. 19,T11 N, R12E, UM ) Total Depth: 9.Plug Back Depth(MD+TVD): 1159'FNL,2551'FEL, Sec.30,T11 N, R12E, UM 11834' • 9102' 4b. Location of Well(State Base Plane Coordinates,NAD 27): 10.Total Depth(MD+TVD): 16. Property Designation Surface: x- 599981 • y- 5959100 r Zone- ASP4 11880' , 9136' • ADL 028262 8r 047453 V TPI: x- 600170 y- 5955784 Zone- ASP4 11.SSSV Depth(MD+TVD): 17. Land Use Permit: Total Depth:x- 600220 y- 5953651 Zone- ASP4 None 18. Directional Survey: ® Yes 0 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 /g2 /' ja6(1"- rG r3 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: GR/RES, GR/RES/DEN/NEU, GR/RES/AziDEN/NEU N/A 23. CASING,LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH ND HOLE AMOUNT CASING Wr.PER FT. GRADE Top BOTTOM TOP BOTTOM SIZE CEMENTING RECORD PULLED 20" 129.5# X-65 Surface 80' Surface 80' 42" 260 sx Arctic Set(Approx.) .4- 9-5/8" 40# L-80 34' 3358' 34' 3136' 12-1/4" 1415 sx DeepCrete,354 sx Class'G',571 sx Deeperete - Pat f..0(L*4- 7" 26# L-80 32' 9399' 32' 9399' 8-3/4" 468 sx LiteCrete. 187 sx Class'G' 4-1/2" 12.6# 13CR85 9214' 11878' 8522' 9134' 6-1/8" Uncemented Sliding Sleeves N,.* 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/ND) (MD+TVD of Top&Bottom;Perforation Size and Number): 4-1/2"Sliding Sleeves w/Swell Packers 4-1/2', 12.6#, 13CR80 9229' 9109'/8428' MD ND MD ND 9778' 8917' 126. ACID,FRACTURE,CEMENT SQUEEZE,ETC. 10048' 8954' 10429' 8992' DEPTH INTERVAL(MD) AMOUNT AND KIND OF MATERIAL USED 10533' 8984' 2127' Freeze Protect w/75 Bbls Diesel 10735' 8965' 11167' 8917' } 4" :t 11554' 8923' 3Ri _11628' 8959' -5' � 11701' 9005' 27. PRODUCTION TEST _ Date First Production: Method of Operation(Flowing,Gas Lift,etc.): Not on Production i N/A Date of Test: Hours Tested: Production For OIL-BBL: GAS-MCF: WATER-BBL: CHOKE SIZE: GAS-OIL RATIO: Test Period Flow Tubing Casing Press: Calculated OIL-BBL: GAS-MCF: WATER-BBL: OIL GRAVITY-API(CORR): Press. 24-Hour Rate 28. CORE DATA Conventional Core(s)Acquired? 0 Yes ®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 lithology and presence of oil,gas or water (submit separate sheets with this form,if needed). Submit detailed descriptions,core chips,photographs and laboratory analytical results per 20 AAC 250.071. None RBDMS MAY 01l',''2014EfY) Form 10-407 Revised 12/2009 CONTINUED ONR VERS LI•IL-/2 Su mit riginal Only . 29. GEOLOGIC MARKERS(List all formations and n. ;rs encountered): 30. ORMATION TESTS NAME MD TVD Well Tested? 0 Yes ®No " Permafrost Top 56' 56' If yes,list intervals and formations tested,briefly summarizing test Permafrost Base 1906' 1824' results. Attach separate sheets to this form,if needed,and submit detailed test information per 20 AAC 25.071. UGNU 3396' 3173' None • Schrader Bluff N 4558' 4326' Schrader Bluff 0 4740' 4504' Base Schrader Bluff 5122' 4857' HRZ 6783' 6412' Kalubik 7048' 6642' Kuparuk C 7083' 6670' LCU/Kuparuk B 7150' 6724' Kuparuk A 7164' 6736' Miluveach 7220' 6779' Kingak 8006' 7441' Sag River 9398' 8686' Shublik 9427' 8712' Eileen 9562' 8817' Ivishak Zone 4 9621' 8854' Ivishak Zone 3 11780' 9063' Formation at Total Depth(Name): Ivishak Zone 3 11780' ' _ 9063' ' 31.List of Attachments: Summary of Daily Drilling Reports,Well Schematic Diagram,Surveys 32.I hereby certify that the re ing is tr e a rect to the best of my knowledge. Signed: Joe Lastufka A Title: Drilling Technologist Date: 41 it, PBU Z-40 211-173 Prepared ByName/Number. Joe Lastufka, 5644091 Well Number Permit No./Approval No. Drilling Engineer: Abby Warren, 564-5720 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 1a: Classification of Service Wells: Gas Injection,Water Injection,Water-Alternating-Gas Injection,Salt Water Disposal,Water Supply for Injection, Observation,or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI(Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level elevation in feet above mean sea level. Use same as reference for depth measurements given in other spaces on this form and in any attachments. Item 13: The API number reported to AOGCC must be 14 digits(ex: 50-029-20123-00-00). Item 20: Report true vertical thickness of permafrost in Box 20. Provide MD and TVD for the top and base of permafrost in Box 28. Item 23: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 24: If this well is completed for separate production from more than one interval(multiple completion),so state in item 1,and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). Item 27: Method of Operation: Flowing,Gas Lift,Rod Pump,Hydraulic Pump,Submersible,Water Injection,Gas Injection,Shut-In,or Other(explain). Item 28: Provide a listing of intervals cored and the corresponding formations,and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. Item 30: Provide a listing of intervals tested and the corresponding formation,and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 12/2009 Submit Original Only TREE= 4-1/16"CMJ 4 0 I WELLHEAD= FMC SAFETY ES: WELL ANGLE 70°@ 9711' '""CHROME ACTUATOR= BAKER C TBG&L KB. ELEV= 89.4' I I BF. ELEV=.. 222 = -I 497° -19-5/8"TAM PORT COLLAR , -(,0e-i> r 1A. KOP= 27? 20"CONDUCTOR, H 80' Max Angle= 99°@ 11263' A-53,215.5# ' I 2103' H4-112"HES X NIP, ID=3.813" 1643 Datum MD= 9693' ID=19.124" GAS LIFT MANDRELS Datum TVD= 8800'SS ST MD ND DEV TYPE VLV LATCH FORT DATE 9-5/8"CSG.40#, L-80 BTRS, ID=8 835" - 3358' -• 6 3427 3205 r 6 KGB-4-5 DMY SBK-2C r 0 `03/28/12 5 5463 5173 r 21 KGB-4-5 DCK BEK ' 0 ®03!28/12 H4 6749 6381 '24 KGB-4-5 DMY SBK-2C r 0 '03/28/12 Minimum ID = 2.992" 11759' 3 7701 7172 r 31 KGB-4-5 DMY SBK-2C r 0 '03/28/12 2 8401 7791 r 26 KGB-4-5 DMY SBK-2C r 0 r03/28/12 4-112" x 3-1/2" LINER XO 1 8971 8305 r 27 KGB-4-5 MAY SBK-2C r 0 '03/28/12 ' 1.--------.4 9049' H4-1/2"HES X NIP, ID=3.813" 4-1/2"SGM-NDPG-CA H 9077' ■ SINGLE DROP SUB, ID=3.958" 9109' -{7 X 4-1/2"HES TNT PKI , 10=3.856" x XS ' r 9143' H4-1/2" HES X NIP, ID=3.813" 9214' HT X 5"BKR HRD-E ZXPN LTP, ID=4.320" TOP OF 4-1/2"LNR --- 9214' • 9216' H4-1/2"HES X NIP, ID=3.813" I- 4-1/2" 4-1/2"TBG, 12.6#, 13CR-S0 VAM TOP, H 9228' 9229' -I4-112"VI/LEG, ID=4,00" .0152 bpf, ID=3.958" \ ELMD TT NOT LOGGED FLEX-LOCK LNR HGR,ID=4.25" 9236' -{7"X 5" 7"LNR,26#, L-80 VAM TOP HC, H 9399' L , .0383 bpf,ID=6.276" 9246' -15"X 4-1/2'X0,ID=3.880" I I 1 I HES"XCY'SLDSLV,C0=3.813" IS El HES SWELL PACKERASSEM SLY SIZE NO# TOP DEPTH 0/C DATE 1 I I I NO SIZE TOP DEPTH MIN ID 4-1/2' 9 11701 C 03/24/12 CE 23 12 4-1/2" 9587 3.958" 4-1/2" 8 11628 C 03/24/12 1 I 1 1 11 4-1/2" 9797 3.958" 4-1/2" 7 11554 C 03/24/12 CK 23 10 4-1/2" 10067 3.958" 4-1/2' 6 11167 C 03/24/12 '1�3�. Ig 239 4-1/2" 10286 3.958" 4-1/2" 5 10735 C 03/24/12 ( ' 1 I 8 4-1/2" 10477 3.958" 4-1/2' 4 10533 C 03/24/12 EX Sf 7 4-1/2" 10613 3.958" 4-1/2' 3 10429 C 03/24/12 I I I 6 4-1/2" 10781 3.958" 4-1/2' 2 10048 C 03/24/12 IS N 5 4-1/2" 10968 3.958" 4-1/2' 1 9778 C 03/24/12 l$ El 4 4-1/2" 11185 3.958" O=OPEN Cr CLOSED 1 I 3 4-1/2" 11456 3.958" CE 23 IS SI 2 4-1/2" 11573 3.958" ( 1 1 I 1 4-1/2" 11645 3.958" IS Sf cj I I I 11739' -BHI LOCATOR SUB, ID=3.91" 23 1 1 11759' - 4-1/2"X 3-1/2'X0,ID=2.992" • cg El 11761' H3-112"HES SWELL PKR ELEMENT,ID=2.992" - 11792' H3-1/2"X 4-1/2"x0,ID=2.992" PBTD - 11824' 4-1/2"LNR, 12.6#, 13CR-80 VAM TOP, -I 11878' .0152 bpf, ID=3.958"• v DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 03/30/12 D-14 INITIAL COMPLETION WELL: Z-40 04/03/12 PJC DRLG DRAFT COMPLETION ' PERMIT No:"2111730 • API No: 50-029-23462-00 SEC 1,TI1 N,R12E,987'FNL&2257'FWL BP Exploration(Alaska) BP AMERICA Leak-Off Test Summary Well Name: Z-40 Surface Leak Off Test Test Test Depth Test Depth AMW Pressure Pressure EMW Date Type (TMD-Ft) (TVD-Ft) (ppg) (psi) (BHP) (psi) (ppg) 03/08/12 LOT 3,357.90 3,135.90 9.00 690.00 2,155.70 13.24 V 03/19/12 FIT 9,404.00 8,691.00 8.60 1,320.00 5,202.70 11.52 Page 1 of 1 North America -ALASKA- BP Page 1 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) _ _ 2/22/2012 12:00 - 20:30 8.50 MOB P PRE MOVE RIG FROM S PAD TO Z PAD. I 20:30 - 00:00 3.50 MOB P PRE SPOT RIG OVER THE WELL. 2/23/2012 00:00 - 01:30 1.50 MOB P PRE FINISH SPOTTING THE RIG OVER Z-40. 01:30 - 02:30 1.00 RIGU P PRE SKID THE RIG FLOOR INTO DRILLING POSITION. _ 02:30 - 12:00 9.50 RIGU P PRE MAKE UP MUDLINE,AIR,STEAM,AND WATER. RIG UP THE RIG FLOOR AND PULLING THE#2 CONVEYOR IN PLACE. RIG UP THE SURFACE ANNULAR AND RIG UP THE DIVERTER LINE. 12:00 - 00:00 12.00 RIGU P PRE .CONTINUE RIGGING UP THE DIVERTER LINE. RIG UP THE RISER, ROCKWASHER, CONVEYOR,AND MWD SHACK. -MOSES CREW HELD A FIRE DRILL,CRT 120 SEC. 2/24/2012 00:00 - 02:00 2.00 RIGU P PRE FINISH WORK ON THE DIVERTER LINE. 02:00 - 03:00 1.00 RIGU P PRE REVIEW PROCEDURES AND HAZARD CARDS WITH THE RIG CREW. 03:00 - 04:30 1.50 RIGU P PRE CLEAR OUT THE CELLAR AREA OF TOOLS AND EQUIPMENT NOT NEEDED FOR -UPCOMING OPERATIONS. CLEAR AND I I -CLEAN OUT THE PIPESHED OF ALL TOOLS NOT NEEDED FOR UPCOMING OPERATIONS. PREPARE TO PICK UP DRILL PIPE. 04:30 - 12:00 7.50 RIGU P PRE PRE-SPUD DERRICK INSPECTION AND LOAD THE PIPE SHED WITH 87 JOINTS OF 4"DRILL i I PIPE. INSTALL THE TIGER TANK AND PERFORM MAINTENANCE ON THE KOOMEY UNIT. 12:00 - 16:00 4.00 RIGU P ' PRE HELD DOYON RIG START UP MEETING WITH RIG TEAMS FROM DOYON 14, 16,AND 25 ALONG WITH BP AND DOYON TOWN PERSONNEL. SIMOPS:CALIBRATE AND TEST THE GAS ALARMS ON THE RIG. LOAD THE PIPESHED WITH THE 4"HWDP AND BHA. 16:00 - 17:00 1.00 BOPSUR P PRE CONDUCT DIVERTER/KNIFE VALVE TEST. ACCUMULATOR TEST,TEST THE PIT ALARMS HIGH AND LOW,AND TEST THE FLOW ALARMS. TEST WITNESSED BY AOGCC REP MATT HERRERA,DOYON TOOLPUSHER NICK MARMON,AND BP WSL MITCH SKINNER. '-PERFORM DIVERTER DRILL WITH LUSCHE'S CREW. 17:00 - 18:00 1.00 RIGU P PRE PRE-SPUD MEETING WITH LUSCHE'S CREW, REVIEW THE PRE-SPUD CHECKLIST AND BRIDGING DOCUMENTS. 18:00 - 21:30 3.50 RIGU P PRE COMPLETE PRE SPUD CHECKLIST,ENSURE ALL EQUIPMENT IS RIGGED UP PROPERLY. -HAVE TOTCO SYSTEM CALIBRATED BY QUADCO. 21:30 - 00:00 2.50 RIGU P PRE PICK UP DRILL PIPE FROM THE PIPE SHED AND RACK BACK IN THE DERRICK. 2/25/2012 00:00 - 02:00 2.00 RIGU P PRE FINISH PICKING UP DRILL PIPE AND RACK BACK IN THE DERRICK. Printed 4/9/2012 10:30:54AM North America-ALASKA- BP Page 2 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date 1 From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:00 - 04:00 2.00 RIGU P PRE PICK UP 4"HWDP AND RACK BACK IN THE DERRICK. 04:00 - 05:30 1.50 RIGU P PRE MOBILIZE BHA COMPONENTS TO THE RIG FLOOR. -ESMAILKA'S CREW HELD FIRE DRILL,CRT 114 SEC. 05:30 - 07:30 2.00 RIGU P PRE PJSM AND RIG UP SPERRY WIRELINE UNIT FOR SURFACE HOLE GYRO. 07:30 - 08:00 0.50 RIGU P PRE PJSM ON MAKING UP BHA, HOLD A TABLE TOP RIG EVACUATION DRILL AND DIVERTER DRILL WITH ESMAILKA'S CREW. '08:00 - 10:00 2.00 RIGU P PRE MAKE UP SURFACE DRILLING BHA#1 AS FOLLOWS: -12.25"HUGHES VM-3 WITH 3 X 18 AND 1 X 16 NOZZLES SERIAL#5201555 -962 POWERPAK PDM(2.12 DEGREE BEND) MOTOR -NON MAG UBHO SUB -NON-MAG STAB. NON-MAG BOTTLENECK CROSSOVER -CROSSOVER -4"HWDP 10:00 - 12:00 2.00 RIGU P PRE PRE-SPUD MEETING WITH ESMAILKA'S CREW AND FILL THE HOLE TO CHECK FOR ANY LEAKS. NO LEAKS. 12:00 - 13:00 1.00 RIGU } P I PRE INSPECT THE TOP DRIVE AND BLOCKS, GREASE THE DRAWWORKS. 13:00 - 13:30 0.50 RIGU N RREP PRE TROUBLESHOOT THE#1 MUD PUMP TRACTION MOTOR. 13:30 - 23:00 9.50 DRILL P SURF DRILL SURFACE HOLE FROM 113'TO 582'. UP WT.72K/DOWN WT.68K/ROT WT.70K PUMPING AT 460 GPM WITH 680 PSI ON/630 PSI OFF. ROTATING AT 40 RPM WITH 4K TQ ON/2K TQ OFF. 10K WOB. PERFORM A GYRO SURVEY EVERY 90'. 23:00 - 23:30 0.50 DRILL P SURF CIRCULATE BOTTOMS UP AT 460 GPM WITH 650 PSI. FLOW CHECK WELL. MUD WT. IN AND OUT 8.8 PPG. 23:30 - 00:00 0.50 DRILL P SURF PULL OUT OF THE HOLE FROM 582'-44'. 2/26/2012 00:00 - 01:00 1.00 DRILL P SURF CONTINUE LAYING DOWN BHA#1. 01:00 - 02:00 I 1.00 DRILL P SURF PJSM,RIG DOWN WIRELINE AND GYRODATA. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 3 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay y Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:00 - 06:30 4.50 DRILL P SURF MAKE UP SURFACE BHA#2 AS FOLLOWS: -12.25"HUGHES VM-3 WITH 3 X 18 AND 1 X 16 NOZZLES SERIAL#5201555 -962 POWERPAK PDM(1.83 DEGREE BEND) MOTOR -ARCVISION 825 -STABILIZER -TELESCOPE -NON-MAG STABILIZER -NON-MAG BOTTLENECK CROSSOVER -NON-MAG DRILL COLLARS(2) -NON-MAG STABILIZER -NON-MAG DRILL COLLAR -SAVER/FLOAT SUB -5"HWDP -6.5"JARS -5"HWDP CROSSOVER RUN IN HOLE FROM 27'TO 583'. -SPILL DRILL, RESPONSE TIME= 123 SECONDS. 06:30 - 12:00 5.50 DRILL , P SURF DRILL DIRECTIONALLY IN 12-1/4"SURFACE HOLE FROM 583'TO 1,009'.UP WT.86K/ DOWN WT.87K/ROT WT.84K PUMP AT 500 GPM,WITH 1220 PSI ON,1110 PSI OFF. ROTATING AT 40 RPM WITH 4K TQ ON/2K OFF. 25K WOB. 12:00 - 00:00 12.00 DRILL ' P SURF DRILL DIRECTIONALLY IN 12-1/4"SURFACE HOLE FROM 1,009'TO 1,725'. UP WT.98K/ DOWN WT.95K/ROT WT.96K PUMP AT 500 GPM,WITH 1220 PSI ON,1120 PSI OFF. ROTATING AT 40 RPM WITH 4K TO ON/2K OFF. 25K WOB. SPILL DRILL; RESPONSE TIME=110 SECONDS. AST=4.35,ART=3.74,ADT=8.09,JAR HOURS=47.69 2/27/2012 00:00 - 03:30 3.50 DRILL P SURF DRILL DIRECTIONALLY IN 12-1/4"SURFACE HOLE FROM 1725'TO 1900'.UP WT. 100K/ DOWN WT.95K/ROT WT.99K PUMP AT 500 GPM,WITH 1270 PSI ON,1170 PSI OFF. ROTATING AT 40 RPM WITH 6K TQ ON/3K OFF. 25K WOB. 03:30 - 05:30 2.00 DRILL P SURF CIRCULATE BOTTOMS UP X 4 AT 500 GPM WITH 1170 PSI ROTATING AND RECIPROCATING. CUTTINGS CONSISTED OF MOSTLY SAND WITH A MINIMAL AMOUNT OF SMALL GRAVEL. MUD WT IN AND OUT 9.2 PPG. MONITOR THE WELL,STATIC. 05:30 - 06:30 1.00 DRILL P SURF PULL OUT OF THE HOLE ON ELEVATORS FROM 1900'TO 283'. NO TIGHT SPOTS WERE OBSERVED. MUD WT IN AND OUT 9.2 PPG. MONITOR THE WELL,STATIC. 06:30 - 08:30 2.00 DRILL P SURF RUN IN THE HOLE FROM 283'TO 1900'. TIGHT AREAS OBSERVED FROM 1190'TO 1490'. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 4 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project: Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(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 SURF DRILL DIRECTIONALLY IN 12-1/4"SURFACE HOLE FROM 1900'TO 2317'. BOTTOMS UP AFTER TRIP IN THE HOLE, HOLE UNLOADED LARGE AMOUNT OF SAND AND CLAY. UP WT. 105K/DOWN WT.88K/ROT WT. 100K PUMP AT 500 GPM,WITH 1470 PSI ON,1250 PSI OFF. ROTATING AT 40 RPM WITH 6K TQ ON/3K OFF. 20K WOB. -ADT5.10/AST2.64/ART2.46 12:00 - 00:00 12.00 DRILL P SURF DRILL DIRECTIONALLY IN 12-1/4"SURFACE HOLE FROM 2317'TO 3280'. UP WT. 126K/ DOWN WT. 108K/ROT WT. 117K PUMP AT 652 GPM,WITH 2580 PSI ON,2390 PSI OFF. ROTATING AT 40 RPM WITH 6K TQ ON/4K OFF. 30K WOB. -ADT 7.33/AST 3.94/ART 3.39 -HELD FIRE DRILL AT 19:45, RESPONSE TIME 30 SECONDS. -HYDRATES TO SURFACE AT 2595',3063', 3250'. 2/28/2012 00:00 - 01:00 1.00 DRILL P SURF DRILL DIRECTIONALLY IN 12-1/4"SURFACE HOLE FROM 3280'TO 3364'. -PUW 126K, SOW 110K, ROT 118K -650 GPM,WITH 2560 PSI ON,2370 PSI OFF. -40 RPM WITH 6K TQ ON/4K OFF. 30K WOB. -AST=0,ART=0.65,ADT=0.65,JARS=61.2 01:00 - 01:30 0.50 DRILL P SURF RACK BACK STAND AND PICK UP A SINGLE TO WORK A FULL STAND. 01:30 - 03:00 1.50 DRILL P SURF CIRCULATE BOTTOMS UP 3 TIMES.MOBILIZE CEMENT HEAD AND CENTRALIZERS TO RIG FLOOR FOR 9-5/8"CASING RUN. 03:00 08:30 5.50 DRILL P SURF ATTEMPT TO PULL ON ELEVATORS.WELL SWABBING. MAKE UP TOP DRIVE AND BACK REAM OUT OF THE HOLE. -650 GPM,2350 PSI -40 RPM 5K TQ. 08:30 - 10:00 1.50 DRILL P SURF RACK BACK 5"HWDP WITH JARS AND DRILL COLLARS. 10:00 - 11:00 1.00 DRILL -. P SURF LAY DOWN BHA#2. BIT GRADED 3-5-WT-A-E-2-RG-TD. -NON-MAG BOTTLENECK CROSSOVER -NON-MAG STABILIZER -TELESCOPE -STABILIZER -ARCVISION 825 -962 POWERPAK PDM(1.83 DEGREE BEND) MOTOR -12.25"HUGHES VM-3 WITH 3 X 18 AND 1 X 16 NOZZLES SERIAL#5201555 11:00 - 12:00 1.00 CASING P SURF CLEAN AND CLEAR RIG FLOOR. -STATIC LOSS RATE 4 BPH. LOSSES FOR TOUR=14 BBLS. 12:00 - 13:30 1.50 CASING P SURF CONTINUE TO CLEAN AND CLEAR RIG FLOOR OF TOOLS NOT NEEDED FOR UPCOMING OPERATIONS. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 5 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 13:30 - 16:30 3.00 CASING P SURF RIG UP TO RUN 9-5/8"CASING,,REMOVE ELEVATOR,SHORT ELEVATOR LINKS. RIG UP FRANKS TOOL, LONG ELEVATOR LINKS, PICK UP SLING,350 TON ELEVATORS AND SINGLE JOINT ELEVATORS. MAKE DUMMY RUN WITH LANDING JOINT AND MARK. RIG UP 350 TON SLIPS,SCAFFOLDING,CASING -TONG AND SAFETY VALVE. 16:30 - 20:45 4.25 CASING P SURF PICK UP SHOE TRACK AND RUN IN THE HOLE WITH 9-5/8",40#, L-80, BTC-M CASING TO 1640'. -ESTIMATED LOSS RATE 10 BPH. 20:45 - 21:15 0.50 CASING P SURF SERVICE AND INSPECT TOP DRIVE,BLOCKS AND DRAWWORKS. 21:15 - 00:00 2.75 CASING P SURF RUN IN THE HOLE WITH 9-5/8'CASING FROM 1640'TO 2070'. WORK THROUGH TIGHT SPOTS AT 2031'TO 2070'. PUMP 185 GPM, 240 PSI. -ESTIMATED LOSS RATE 8-18 BPH. LOSSES FOR TOUR=86 BBLS. 2/29/2012 00:00 - 14:00 14.00 CASING P SURF CONTINUE TO RUN SURFACE CASING FROM 2070'.CIRCULATING EVERY JOINT DOWN WITH 189 GPM 250 PSI. WORKING EACH JOINT SEVERAL TIMES TO GET DOWN. LOSS RATE DECREASING AND SUBSTANTIAL AMOUNT OF SAND COMING ACROSS THE SHAKERS.STAGE PUMPS UP TO 230 GPM AND CONTINUE TO WORK DOWN. INCREASE LSYP AND RETURNS CLEANED UP. CONTINUE TO WASH DOWN. UNABLE TO WORK PAST 2390'. 14:00 - 18:00 4.00 CASING N DPRB SURF RECIPROCATE AND CIRCULATE AT 189 GPM 300 PSI WHILE RIGGING UP EQUIPMENT TO LAY DOWN 9-5/8"CASING.GUIDE BOLT ON THE SUPER TONGS HYDRAULIC CYLINDER SHEARED. FIRE DRILL CREW RESPONDED IN 1 MIN 25 SEC. 18:00 - 19:30 1.50 CASING N SFAL SURF REPAIR HYDRAULIC CYLINDER ON SUPER TONGS. 19:30 - 22:30 3.00 CASING N DPRB SURF PJSM.PUMP DRY JOB.ATTEMPT TO PULL OUT OF HOLE. PICK UP TO 260K IN THE FIRST 20'.SLACK BACK OFF AND LOST 10'. PICK UP TO 260K AGAIN AND MAKE NO HEADWAY.WASH DOWN AT 189 GPM 300 PSI AND WASH FILL.CIRCULATE SURFACE TO SURFACE STAGING PUMPS TO 330 GPM WHILE RECIPROCATING. NO SIGNIFICANT CUTTING SEEN DURING CIRCULATION. PJSM AND RIG UP TO PUMP OUT OF THE HOLE. 22:30 - 00:00 1.50 CASING N DPRB SURF ATTEMPT TO PICK UP WITH NO PUMPS PULL UP TO 300K. UNABLE TO PULL WITHOUT PUMPING. PUMP OUT OF THE HOLE FROM 2390'-2312'AT 220 GPM 250 PSI. 3/1/2012 00:00 - 03:30 3.50 CASING N DPRB SURF PUMP OUT OF HOLE AT 173 GPM 250 PSI FROM 2272'-1833'. 03:30 - 04:30 1.00 CASING N DPRB SURF PUMP AT 12.8 PPG DRY JOB,LAY DOWN THE LONG BALES,FRANKS TOOL,AND ELEVATORS. RIG UP THE SHORT BALES AND SIDE DOOR ELEVATORS. Printed 4/9/2012 10:30:54AM North America-ALASKA- BP Page 6 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs I Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:30 - 13:00 8.50 CASING N DPRB SURF PULL OUT OF THE HOLE ON ELEVATORS FROM 1833'. -FLOAT SHOE NOSE WAS LOST DOWNHOLE ALONG WITH 15 CENTRALIZER BLADES. THE FLOAT SHOE JOINTS AND JOINTS 57-59 WERE ALSO DAMAGED. 13:00 - 16:30 3.50 CASING N DPRB SURF CLEAN AND CLEAR THE RIG FLOOR OF ALL THE TOOLS NOT NEEDED FOR UPCOMING OPERATIONS. 16:30 - 17:00 0.50 CASING N DPRB SURF PICK UP THE MOTOR AND LWD. 17:00 - 18:00 1.00 BOPSUR N DPRB SURF DRAIN THE STACK AND PERFORM THE 'DIVERTER/KNIFE VALVE FUNCTION TEST. KNIVE VALVE OPENED AND DIVERTER ANNULAR CLOSED IN 30 SEC.TEST WITNESSED BY BP WSL BLAIR NEUFELD AND DOYON TOOLPUSHER NICK MARMON. AOGCC REP JEFF JONES WAIVED WITNESS AT 13:45 ON 3/1/12. 18:00 - 21:00 3.00 CASING N DPRB SURF MAKE UP CLEANOUT BHA#3 AS FOLLOWS -12.25"HUGHES VM-3 WITH 3 X 18 AND 1 X 16 NOZZLES -962 POWERPAK PDM(1.83 DEGREE BEND) MOTOR -ARCVISION 825 21:00 - 23:00 2.00 CASING N DPRB SURF SLIP AND CUT DRILLING LINE. SERVICE THE TOP DRIVE AND DRAWWORKS. 23:00 - 00:00 1.00 CASING N DPRB SURF CONTINUE MAKING UP CLEANOUT BHA#3 AS FOLLOWS: STABILIZER -TELESCOPE NON-MAG STABILIZER -NON-MAG BOTTLENECK CROSSOVER -NON-MAG DRILL COLLARS(2) -NON-MAG STABILIZER -NON-MAG DRILL COLLAR -SAVER/FLOAT SUB 3/2/2012 00:00 - 01:00 1.00 CASING N DPRB SURF CONTINUE PICKING UP BHA#3 -5"HWDP -HYDRA-JARS -5"HWDP -4"HWDP 01:00 - 04:00 3.00 CASING N DPRB SURF SHALLOW HOLE TEST,BLOW DOWN TOP DRIVE AND CONTINUE TO RUN IN HOLE TO 1330'.TAG UP AND ATTEMPT TO WORK THROUGH.ATTEMPTED TO WORK THROUGH AT DIFFERENT ORIENTATIONS NO PUMPS. SLOW RPM, DIFFERENT ORIENTATIONS 50 GPM, HIGH SIDE 200 GPM,5 RPM 200 GPM,20 RPM 200 GPM,FINALLY BROKE THROUGH. 04:00 - 07:00 3.00 CASING N DPRB SURF CONTINUE RUNNING IN HOLE TO 2100' STARTED SEEING INCREASED DRAG HOLE TAKING WEIGHT AT 2250' ATTEMPT TO WORK THROUGH AT DIFFERENT ORIENTATIONS. NO PUMPS, SLOW RPM. DIFFERENT ORIENTATIONS 50 GPM. ROTATE AT 60 RPM WITH 600 GPM AT 1870 PSI. WASH AWAY THE OBSTRUCTION AND CONTINUE IN THE HOLE TO 2375'. WORK THROUGH WITH THE SAME PARAMETERS AS ABOVE. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 7 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 07:00 - 10:00 3.00 CASING N DPRB SURF CONTINUE TO WASH AND REAM IN THE HOLE SEEING TIGHT SPOT AT 2411'. WORK THROUGH AND CONTINUE WASHING IN THE HOLE AT 550 PSI WITH 1700 PSI ROTATING AT 40 RPM. 10:00 - 12:30 2.50 ' CASING N DPRB SURF CONDITION MUD AND CIRCULATE ROTATING AT 80 RPM WITH 8K FREE TORQUE. PUMPING AT 750 GPM WITH 3150 PSI UP WT 140K/SOW 107K/ROT WT 120K. PUMP A HI-VIS SWEEP SURFACE TO SURFACE. MUD WT IN AND OUT 9.4 PPG 12:30 - 14:00 1.50 CASING N DPRB SURF MONITOR THE WELL,STATIC. LAYDOWN 1 JOINT OF 4"DRILL PIPE AND PULL OUT ON ELEVATORS FROM 3364'TO 2160'. WORK THROUGH TIGHT SPOT AT 2160'OBSERVING UP TO 60K OVERPULL. WORKED CLEANED AND CONTINUE TO 1852'. 14:00 - 15:00 1.00 CASING N DPRB SURF FLOW CHECK WELL. STATIC MUD WT.IN AND OUT 9.4 PPG. RUN IN THE HOLE FROM 1852'TO 3343'. 15:00 - 00:00 9.00 CASING N DPRB SURF CIRCULATE AND CONDITION MUD,600 GPM 1870 PSI 80 RPM 6K TQ.THE PREVIOUSLY RUN 9-5/8"CASING COLLAR THREADS FAILED INSPECTION.MOBLIZE 56 NEW JTS OF CASING AND REMOVE THREAD PROTECTORS, DRIFT,STRAP,AND INSTALL _ TORQUE RINGS. 3/3/2012 00:00 - 02:00 2.00 CASING . N DPRB SURF CIRCULATE AND CONDITION MUD WORKING A FULL STAND.CONTINUE STRAPPING THE 56 JTS OF NEW 9-5/8"CASING FOR UPCOMING CASING RUN. -600 GPM 2280 PSI -80 RPM 5K TO -PUW 145K SOW 101K ROT 118K 02:00 - 04:00 2.00 CASING N DPRB SURF FLOW CHECK 10 MIN CONFIRM NO FLOW. PULL OUT OF HOLE ON ELEVATORS FROM 3364".SAW 25K OVERPULL AT 2530'RUN BACK THROUGH AND WIPED CLEAN. CONTINUE TO PULL OUT OF HOLE TO 916'. 04:00 - 08:30 4.50 CASING N DPRB SURF FLOW CHECK 10 MIN AND CONFIRM NO FLOW.STAND BACK 4"HWDP AND LAY DOWN BHA#3. 08:30 - 12:00 3.50 CASING N DPRB SURF LAY DOWN SHORT BALES,PICK UP CASING RUNNING TOOLS AND RIG UP VOLANT RUNNING TOOL.MAKE A DUMMY RUN WITH THE 9-5/8"HANGER AND CHECK TORQUE ON THE SPLIT LANDING JOINT.TORQUED UP 1K ON THE LEFT HAND THREAD AND IT DIDN'T BREAK.SEND LANDING JOINT BACK TO TOWN.CHANGE OUT BELL GUIDE AND GRABBERS FOR VOLANT TOOL. 12:00 - 13:30 1.50 CASING N DPRB SURF PJSM.CONTINUE TO RIG UP TO RUN VOLANT CASING RUNNING TOOL. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 8 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.: DOYON 14 I Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date I From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 13:30 - 23:30 10.00 CASING N DPRB SURF RUN 9-5/8"40#BTC-M CASING.MAKE UP WORTHOG REAMER SHOE AND SHOE TRACK. RUN IN HOLE CIRCULATING DOWN EVERY 10 JTS TO 2575'.SET DOWN 25K,PICK UP AND CIRCULATE AT 190 GPM 220 PSI, WASH DOWN AND WORK TIGHT SPOT UNTIL CLEAN.CONTINUE RUNNING IN HOLE TO 3238'.WASH DOWN REMAINING TWO JOINTS. LAY DOWN VOLANT TOOL AND PICK UP LANDING JOINT WITH CIRCULATING SWEDGE. LAND CASING ON THE RING WITHOUT NEED FOR PUMPS. -PUW 190K SOW 125K. 23:30 - 00:00 0.50 CASING P SURF RIG DOWN CIRCULATING SWEDGE AND RIG UP CEMENT HEAD. 3/4/2012 00:00 - 04:00 4.00 CEMT P SURF RIG UP CEMENTERS AND CIRCULATE AND CONDITION MUD WHILE RECIPROCATING 5'. THINNNING THE MUD BACK FOR CEMENT JOB. -336 GPM,340 PSI -PUW 175K SOW 110K 04:00 - 07:00 3.00 CEMT P SURF RIG UP AND PRESSURE TEST FROM CEMENTERS 250 PSI LOW 3500 PSI HIGH. 07:00 - 09:00 2.00 CEMT P SURF PJSM WITH ALL PERSONEL INVOLVED IN CEMENT JOB.CONTINUE CIRCULATING AT 336 GPM 250 PSI. 09:00 - 12:00 3.00 CEMT P SURF CEMENT 9-5/8"SURFACE CASING AS FOLLOWS:PUMP 96.3 BBLS OF 10.2 PPG !� 4 MUD PUSH AT 5.5 BPM.DROP BOTTOM PLUG FOLLOWED BY 481.2 BBLS 1415 SACKS OF 11.2 PPG DEEPCRETE LEAD CEMENT AT 6 BPM.PUMP 73.2 BBLS 355 SACKS OF 15.8 PPG OF CLASS G CEMENT AT 6 BP.DROP TOP PLUG AND PUMP 10 BBLS OF WATER. SWITCH OVER TO RIG AND DISPLACE WITH 9.0 PPG BRINE AT 8 BPM.SLOW DOWN TO 4.5 BPM AT 220 BBLS AWAY.SLOWED TO 2.0 BPM AT 230 BBLS AWAY. BUMPED PLUG WITH 239 BBLS.CIP 11:40.PRESSURE UP TO 1200 PSI AND 11-ELD FOR 15 MINS.BLEED PRESSURE OFF AND CHECK FLOATS FLOATS HELD. RETURNS THROUGHOUT ENTIRE CEMENT JOB.MUD PUSH TO, 0°-(I SURFACE,BUT NO CEMENT. _ G 12:00 - 13:30 1.50 CEMT N CEMT SURF RIG DOWN CEMENT EQUIPMENT AND BACK 4' OFF THE LEFT HAND JOINT ON THE SPLIT LANDING JOINT. 13:30 - 15:00 1.50 CEMT N CEMT SURF PJSM.PICK UP COMBO TOOL AND XO TO 4" DP.RUN IN HOLE TO 495'AND SET COMBO TOOL.SHIFT TAM PORT COLLAR OPEN WITH '5K DOWN. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 9 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 15:00 - 19:30 4.50 CEMT N CEMT SURF PJSM.CIRCULATE THORUGH TAM PORT COLLAR AT 210 GPM 100 PSI,252 GPM 120 PSI.CEMENT RETURNED TO SURFACE 10 BBLS INTO DISPLACENT.CONTINUE CIRCULATING UNTIL RETURNS CLEANED UP AND MUD THINNED BACK. RIG UP FOR CEMENTING.ATTEMPT TO REGAIN CIRCULATION AND SAW PRESSURE SPIKE TO 2600 PSI.UNABLE TO ESTABLISH CIRCULATION THROUGH TAM PORT SHEARED THE CHOKE IN THE COMBO TOOL. DROP A BALL AND SEAT IN COMBO TOOL, AND REGAIN CIRCULATION THROUGH TAM PORT COLLAR. 19:30 - 21:30 2.00 CEMT N CEMT SURF PJSM.RIG UP AND PRESSURE TEST FROM CEMENTERS 250 PSI LOW 1500 PSI HIGH. GOOD TEST. 21:30 - 00:00 2.50 CEMT N CEMT SURF CEMENT TOP JOB AS FOLLOWS.PUMP 46.9 BBLS OF 10.2 PPG MUiff PUSH AT 3 BPM. COMP 158 BBLS OF CEMENT AT 2 BPM AND STN—W PH INCREASE IN THE RETURNS. 3/5/2012 00:00 - 01:00 1.00 CEMT N CEMT SURF CONTINUE CEMENT JOB.AT 168 BBLS SAW PH STABILIZE AND GOOD CEMENT BACK TO SURFACE.AFTER 184 BBLS INCREASE PUMP RATE TO 3 BPM. PUMP A TOTAL OF 194.3 BBLS 572 SACKS OF 11.2 PPG DEEPCR WITFCA .91 FTA3/SK YIELD. FOLLOW CEMENT WITH 5 BBLS OF WATER.CIP 00:42 01:00 - 01:30 0.50 CEMT N CEMT SURF CLOSE TAM PORT COLLAR PRESSURE UP TO 1000 PSI AND CONFIRM COLLAR IS CLOSED.PICK UP AND DISENGAGE FROM COLLAR.PRESSURE UP TO 2200 PSI AND ATTEMPT TO BLOW THE BALL OUT OF THE COMBO TOOL.PRESSURE UP AGAIN TO 3500 PSI WITH NO SUCCESS. 01:30 - 02:00 0.50 CEMT N CEMT SURF PULL OUT OF HOLE WITH COMBO TOOL. 02:00 - 02:30 0.50 CEMT N CEMT SURF PICK UP STACK WASHER AND RUN IN HOLE TO 500'. 02:30 - 03:00 0.50 CEMT N CEMT SURF DROP DP WIPER BALL AND CIRCULATE AT 330 GPM 120 PSI,AT 80 RPM. 03:00 - 03:30 0.50 CEMT N CEMT SURF BLOW DOWN TOP DRIVE AND PULL OUT OF HOLE AND LAY DOWN STACK WASHER. 03:30 - 05:30 2.00 CASING P SURF MAKE UP SPLIT JOINT,DISABLE KNIFE VALVE,FUNCTION ANNULAR WITH BLACK WATER,AND FLUSH THE FLOW LINE. 05:30 - 12:00 6.50 CASING P SURF PJSM. PULL SURFACE RISER AND BAG, BREAK DOWN DIVERTER LINE,AND PERFORM A FULL DERRICK INSPECTION. CLEAN AND CLEAR RIG FLOOR. 12:00 - 00:00 12.00 CASING P SURF NIPPLE UP SPEED HEAD,CASING SPOOL, TEST SEAL 250 PSI 5 MIN AND 5000 PSI 5 MIN. GOOD TEST. INSTALL BOP STACK,CLEAN PITS, REMOVE SIDE DOOR ELEVATORS, LONG BAILS,CHANGE OUT GRABBERS ON TOP DRIVE TO 4",ATTACH EXTENSION TO CHOKE LINE AND ATTACH TO STACK, RIG UP DOUBLE VALVES TO UPPER AND LOWER ANNULUS,AND INSTALL RISER. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 10 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 3/6/2012 00:00 - 02:00 2.00 BOPSUR P SURF CONTINUE NIPPELING UP THE BOP STACK. CLEAR AND CLEAN THE RIG FLOOR OF ALL TOOLS. RIG UP TO TEST BOPE. 02:00 - 02:30 0.50 BOPSUR P SURF CONDUCT BOP KICK DRILL WITH CARLOS CREW. TOOK 6 BBLS TO FILL THE CHOKE MANIFOLD AND GAS BUSTER. 02:30 - 08:00 5.50 BOPSUR P SURF TEST BOPE EQUIPMENT TO 250 PSI LOW/ 3500 PSI HIGH FOR 5 MINUTES EACH TEST. CHARTED. TEST WITH 4"TEST JOINT. ,AOGCC REP JEFF JONES WAIVED WITNESS. 08:00 - 08:30 0.50 BOPSUR P SURF RIG DOWN TEST EQUIPMENT AND PULL TEST PLUG. 08:30 - 09:00 0.50 BOPSUR P ' SURF RIG UP AND PRESSURE TEST CASING TO 250 PSI 5 MIN PRESSURED UP FOR HIGH TEST AND PRESSURE WAS BLEEDING OFF SHUT DOWN AT 1450 PSI. 09:00 - 09:30 0.50 BOPSUR N CEMT SURF INSTALL LOWER TEST PLUG AND RIG UP AND TEST SURFACE EQUIPMENT.FOUND NO LEAKS IN SURFACE EQUIPMENT. 09:30 - 12:00 2.50 BOPSUR N CEMT SURF PULL LOWER TEST PLUG INSTALL WEAR RING BLOW DOWN THE CHOKE AND KILL LINE AND MANIFOLD, SUCK OUT BOP STACK TO THE ROCK WASHER. 12:00 - 14:00 2.00 BOPSUR N CEMT SURF PJSM.CLEAR RIG FLOOR,RIG UP SHORT BAILS AND 4"ELEVATORS, PICK UP COMBO TOOL AND RUN IN HOLE WITH 4"DP TO 495'. 14:00 - 19:00 5.00 BOPSUR N CEMT SURF PUW 60K SOW 56K. LATCH INTO TAM PORT COLLAR AND CIRCULATE AT 4 BPM 180 PSI WITH RETURNS COMING UP THE OA.CYCLE OPEN AND CLOSED MULTIPLE TIMES WITH AND WITHOUT PUMPS. PICK UP AND CLOSE TAM COLLAR WITH 30K OVER NEUTRAL WEIGHT. PRESSURE TEST THE TAM PORT COLLAR TO 2040 PSI AND PRESSURE HELD. 19:00 - 19:30 0.50 BOPSUR N CEMT SURF PULL OUT OF HOLE AND LAY DOWN COMBO TOOL 19:30 - 21:30 2.00 BOPSUR N CEMT SURF RIG UP AND TEST 9-5/8"CASING TO 250 PSI LOW 5 MIN 3500 PSI HIGH FOR 30 MIN.BLEED OFF 20 PSI IN THE FIRST 15 MIN,AND 10 PSI / IN SECOND 15 MIN.GOOD TEST. 21:30 - 00:00 2.50 BOPSUR P SURF MOVE 5"HWDP,A COLLAR STAND,AND 4" HWDP AROUND IN DERREK TO MAKE ROOM FOR 4"DP. PICK UP DRILL PIPE FROM PIPE SHED AND RIH 3/7/2012 00:00 - 06:30 6.50 BOPSUR P SURF CONTINUE TO PICK UP 4"DP AND RACK BACK IN DERRICK 06:30 - 07:30 1.00 BOPSUR N CEMT SURF RIH WITH COMBO TOOL TO 495'LATCH INTO TAM PORT COLLAR AND OPEN 07:30 - 08:30 1.00 BOPSUR N CEMT SURF CIRCULATE 20 BBLS AT 2 BPM 100 PSI TAKING RETURNS TO CELLAR 08:30 - 09:00 0.50 BOPSUR N CEMT SURF PJSM WITH ALL HANDS ON CEMENT JOB 09:00 - 11:00 2.00 BOPSUR N CEMT SURF PRESSURE TEST CEMENT LINES 250 PSI LOW,4000 PSI HIGH 5 MINUTES EACH TEST Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 11 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:00 - 12:30 1.50 REMCMT N CEMT SURF PUMP 5 BBLS OF WATER FOLLOWED BY 117 BBLS 15.7 PPG AS1 CEMENT,(711 SX),(0.93 F1-3/SX)AT 2 BPM,130 PSI,FOLLOWED BY 6 BBLS OF WATER.36 BBLS OF CEMENT RECOVERED AT SURFACE.81 BBLS(489 SX) CEMENT IN PLACE 1230. .. _ 12:30 - 13:30 1.00 REMCMT N CEMT SURF PICK UP 30K ABOVE NEUTRAL WT TO CLOSE TAM PORT COLLAR WITH COMBO TOOL. 13:30 - 14:30 1.00 REMCMT N CEMT SURF PULL OUT OF HOLE AND LAY DOWN COMBO TOOL 14:30 - 15:00 0.50 REMCMT N CEMT SURF CLEAN AND CLEAR FLOOR 15:00 - 20:00 5.00 REMCMT P SURF PICK UP DRILL PIPE AND RACK BACK IN DERRICK 48 JOINTS TOTAL 16 STANDS 20:00 - 21:30 1.50 REMCMT P SURF RIG UP AND TEST 95/8 CASING 250 PSI LOW FOR 5 MINUTES 3500 PSI HIGH FOR 30 MINUTES LOST 20 PSI IN THE FIRST 15 MIN,10 PSI IN THE SECOND 15 MIN. PASSING TEST TEST APPROVED BY WTL RIG DOWN AND BLOW DOWN LINES 21:30 - 22:00 0.50 DRILL P SURF MOBILIZE INTERMEDIATE BHA COMPONENTS TO FLOOR 22:00 - 00:00 2.00 DRILL P SURF PICK UP INTERMEDIATE BHA 3/8/2012 00:00 - 01:30 1.50 DRILL P SURF CONTINUE TO PICK UP INTERMEDIATE BHA 01:30 - 05:30 4.00 DRILL N HMAN SURF WHILE INSTALLING ADN SOURCE THE FISHING CAP WAS FOUND TO BE MISSING ON THE SOURCE ITSELF. HAD REDRESS KIT SENT OUT AND MWD HANDS TO REDRESS SOURCE. PJSM WAS HELD WITH ALL HANDS, PIPE SHED WAS CLEARED OF ALL NONESSENTIAL PERSONAL,AREA WAS FLAGGED OFF WITHIN A 75' RADIUS OF SOURCE, SPOTTERS WERE PLACED ON BOTH SIDES OF PIPE SHED TO KEEP PERSONEL FROM ENTERING. 05:30 - 07:30 2.00 DRILL P SURF CONTINUE TO MAKE UP INTERMEDIATE BHA ROTATE BHA THROUGH TAM PORT COLLAR FROM 450'TO 750'_ 07:30 - 08:00 0.50 DRILL P SURF SHALLOW HOLE TEST MWD,PRESSURE TEST TAM PORT COLLAR TO 2000 PSI 08:00 - 08:30 0.50 DRILL P SURF CONTINUE TO RUN IN HOLE WITH HWDP FROM DERRICK TO 934' 08:30 - 10:30 2.00 DRILL P SURF CONTINUE TO PICK UP DRILL PIPE FROM PIPE SHED TO 2450' USING SPINNER HAWKS AND RIG TONGS, DUE TO IRON ROUGHNECK FAILURE 10:30 - 13:00 2.50 DRILL P SURF RUN IN HOLE FROM DERRICK FROM 2450'TO 3179' 13:00 - 14:00 1.00 DRILL P SURF WASH DOWN FROM 3179'TO 3227'TAG -CEMENT. DRILL CEMENT TO 3347'10'ABOVE FLOAT SHOE. -PUW 132K,SOW 105K, ROT 115K -400GPM,850 PSI ON,800 PSI OFF -30 RPM 4K TQ ON/OFF 15:00 - 16:30 1.50 DRILL P SURF PULL CIRCULATE BOTTOMS UP AT 400 GPM 950 PSI.WHILE THAWING ARTIC DUMP 16:30 - 17:30 1.00 DRILL N RREP SURF THAWING ARTIC DUMP Printed 4/9/2012 10:30:54AM North America-ALASKA- BP Page 12 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 17:30 - 19:00 1.50 DRILL P SURF PJSM. PUMP A 10 BBL HIGH VIS SWEEP AND DISPLACE OVER TO 9.0 PPG LSND. SPR TAKEN AT 3347'MD 310T WO,MW 9.0 PPG,19:00 PUMP 1 AT 20 SPM 210 PSI,AT 30 SPM 260 PSI PUMP 2 AT 20 SPM 210 PSI,AT 30 SPM 250 PSI 19:00 - 20:00 1.00 DRILL P SURF DRILL AHEAD TO 3384'. -PUW 132K,SOW 105K, ROT 115K -300 GPM, 660 PSI. -WOB 10K,40 RPM,5K TQ ON 20:00 - 20:30 0.50 DRILL P SURF RACK BACK ONE STAND TO 3325'CBU GPM 300, PSI 680, RPM 30 20:30 - 22:30 2.00 DRILL P SURF RIG UP AND PERFORM LOT TO 690 PSI,EMW OF 13.2 PPG LOT APPROVED BY WTL MIKE SCHULTZ BLOW DOWN LINES AND RIG DOWN 22:30 - 00:00 1.50 DRILL P INTI PJSM,SLIP AND CUT DRILLING LINE 3/9/2012 00:00 - 00:30 0.50 DRILL P INTI SERVICE AND INSPECT TOP DRIVE,BLOCKS t/ AND DRAWWORKS,CALIBRATE BLOCK HEIGHT 00:30 - 01:30 1.00 DRILL P INTI LOG FROM 3268'TO 3384',200 FT/HR 01:30 - 12:00 10.50 DRILL P INTI DRILL AHEAD FROM 3384'-4857'. -PUW 162K,SOW 117K, ROT 135K -600 GPM, PSI, ECD CAL 10.04, ECD ACT 10.21 -WOB 15K,80 RPM,9K TQ ON,6K OFF -AST 1.56,ART 4.42,ADT 5.98,JAR HR 67.3 SPR 3920'MD 3960'TVD 9.2 PPG MP1 20 SPM 210 PSI,30 SPM 300 PSI MP2 20 SPM 280 PSI,30 SPM 360 PSI SPR 4452'MD 4220'TVD 9.2 PPG MP1 20 SPM 300 PSI,30 SPM 370 PSI MP2 20 SPM 300 PSI,30 SPM 360 PSI 12:00 - 00:00 12.00 DRILL P INTI DRILL AHEAD FROM 4857-.6255' -PUW 186K,SOW 124K, ROT 143K -600 GPM, 3610 PSI, ECD CAL 10.94 PPG, ECD ACT 11.90 PPG -WOB 20K,80 RPM,10K TQ ON,7K OFF -AST 1.14,ART 6.26,ADT 7.62,JAR HR 74.7 SPR 5511'MD 5300'TVD 9.2 PPG MP1 20 SPM 280 PSI,30 SPM 360 PSI MP2 20 SPM 280 PSI,30 SPM 350 PSI SPR 6155'MD 5738'TVD 10.3 PPG MP1 20 SPM 350 PSI,30 SPM 440 PSI MP2 20 SPM 350 PSI,30 SPM 450 PSI 1 LB OF METEAL IN DITCH MAGNETS FOR THIS TOUR. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 13 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. IUWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth' Phase Description of Operations (hr) (ft) 3/10/2012 00:00 - 12:00 12.00 DRILL P INTI DRILL AHEAD FROM 6255'TO 7124' -PUW 201K,SOW 131K, ROT 156K -550 GPM, 3750 PSI ON,3480 PSI OFF ECD CAL 11.01 PPG, ECD ACT 11.55 PPG -WOB 25K,100 RPM,10K TQ ON,7K OFF -AST 4.53,ART 3.17,ADT 7.70,JAR HR 81.2 SPR 6536'MD 6183'TVD 10.4 PPG MP1 20 SPM 400 PSI,30 SPM 500 PSI MP2 20 SPM 450 PSI,30 SPM 510 PSI SPR 7098'MD 6687'TVD 10.4 PPG MP1 20 SPM 390 PSI,30 SPM 500 PSI MP2 20 SPM 400 PSI,30 SPM 500 PSI 12:00 - 00:00 12.00 I DRILL P INTI DRILL AHEAD FROM 7124'TO 7992' -PUW 206K,SOW 135K, ROT 162K -545 GPM, 3980 PSI ON,3730 PSI OFF ECD CAL 10.98 PPG, ECD ACT 11.64 PPG -WOB 25K,100 RPM,12K TQ ON,11K OFF -AST 1.47,ART 5.33,ADT 6.88,JAR HR 90 SPR 7561'MD 7055'TVD 10.3 PPG MP1 20 SPM 400 PSI,30 SPM 500 PSI -MP2 20 SPM 400 PSI,30 SPM 510 PSI 3/11/2012 00:00 - 12:00 11.00 DRILL P INTI DRILL AHEAD FROM 7992'-8901' -PUW 226K,SOW 145K, ROT 175K -545 GPM, 3980 PSI ON,3730 PSI OFF ECD CAL 10.98 PPG, ECD ACT 11.64 PPG -WOB 18K,100 RPM,13K TQ ON,11K OFF -ART 5.74,AST 2.08,ADT 7.82,JAR HRS 97.9 SPR 7940'MD,7438'TVD MW 10.3 PPG MP#1 20 SPM 460 PSI,30 SPM 560 PSI MP#2 20 SPM 460 PSI,30 SPM 560 PSI SPR 8781'MD,8130'TVD MW 10.3 PPG MP#1 20 SPM 400 PSI,30 SPM 520 PSI MP#2 20 SPM 410 PSI,30 SPM 510 PSI 12:00 - 19:30 7.50 DRILL P INTI DRILL AHEAD FROM 8901'TO TD AT 9404" SAW REVERSE DRILLNG BREAK AT 9395'. -PUW 235K,SOW 150K, ROT 180K -551 GPM, 3790 PSI ON,3680 PSI OFF ECD CAL 10.95 PPG, ECD ACT 11.8 PPG -WOB 22K,100 RPM,13K TQ ON,10K OFF -ART 3.9,AST 1.66,ADT 5.56,JAR HRS 103.4 SPR 9241'MD,8545'TVD MW 10.3 PPG MP#1 20 SPM 360 PSI,30 SPM 490 PSI MP#2 20 SPM 360 PSI,30 SPM 480PSI SPR 9404'MD,8681'TVD MW 10.3 PPG MP#1 20 SPM 330 PSI,30 SPM 420 PSI MP#2 20 SPM 360 PSI,30 SPM 430 PSI 19:30 22:00 2.50 DRILL P INTI CIRCULATE 3 BOTTOMS UP.GLAUCONITE IN THE CUTTINGS. -PUW 230K,SOW 150K, ROT 185K -550 GPM,3780 PSI, ECD 0.05 OVER CALCULATED. -100 RPM,10K TQ -MW IN 10.3,MW OUT 10.3 Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 14 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 22:00 - 00:00 2.00 DRILL P INTI FLOW CHECK THE WELL FOR 10 MIN AND CONFIRMED NO FLOW. PUMP OUT OF THE HOLE AT 2 BPM TO 8221'. 10-15K OVERPULL 'THROUGH THE KINGAK.WITH CIRCULATING PRESSURE INCREASED FROM 450 PSI-930 PSI. 3/12/2012 00:00 - 01:30 1.50 DRILL P INTI CONTINUE PUMPING OUT OF THE HOLE AT 2 BPM FROM 8221'-7380'.CONTINUED TO HAVE OVERPULLS OF 10-20K IN THE MILUVEACH. PUMP PRESSURE INCREASING WITH INTERMITTENT PACKING OFF. 01:30 - 02:00 0.50 DRILL P INTI RIG UP AND MAD PASS TO 7370' AT 540 GPM,3760 PSI,10K TQ,80 RPM.SHOCK 'HOSE FAILED WHILE MAD PASSING. 02:00 - 04:30 2.50 DRILL N RREP INTI SHUT DOWN PUMPS AND RIG UP TO CIRCULATE THROUGH THE CEMENT HOSE, AND WORK PIPE.CIRCULATE AT 250 GPM, 940 PSI WHILE WORKING THE PIPE. 04:30 - 12:00 7.50 DRILL N RREP INTI WORK PIPE WITH NO PUMPS WHILE WORKING ON SHOCK HOSE. 12:00 - 20:30 8.50 DRILL N RREP INTI WORK PIPE NO PUMPS NO ROTATION AT STAND#69, MD=7380',PUW=225,SOW=120. MONITORING WELL WITH TRIP TANK. 20:30 - 22:30 2.00 DRILL N RREP INTI CIRCULATE BOTTOMS UP,STAGING UP TO 6 BPM AT 1850 PSI,40 RPM, TORQUE=9K 22:30 - 00:00 1.50 DRILL N RREP INTI CONTINUE WORKING PIPE,NO PUMPS,NO ROTATION. MD=7380.PUW=225,SOW=120. SIM OPS=INSTALLING SHOCK HOSE IN OFF DRILLER SIDE"HELL HOLE" 3/13/2012 00:00 - 01:30 1.50 DRILL N RREP INTI CONTINUE TO INSTALL SHOCK HOSE. 01:30 - 02:00 0.50 DRILL N RREP INTI TEST TARGET TEE AND SHOCK HOSE TO 500 PSI LOW AND 4500 PSI HIGH FOR 5 MIN. GOOD TEST. 02:00 - 03:00 1.00 DRILL P INTI CONTINUE TO MADD PASS AT 300 FEET PER HOUR FROM 7318'TO 7156'WITH 550 GPM 3400 PSI,80 RPM AND 10K FT-LBS TORQUE. 03:00 - 06:30 3.50 DRILL P INTI BACK REAM OUT OF HOLE FROM 7156'-5116 WITH 550 GPM AT 3400 PSI,80 RPM 10K FT-LBS TORQUE. _ 06:30 - 09:00 2.50 DRILL P INTI MADD PASS FROM 5116'TO 4556'WITH 550 ✓ GPM AT 2800 PSI PULLING 300 FEET PER HOUR. 09:00 - 09:30 0.50 DRILL P INTI FLOW CHECK WELL FOR 10 MINUTES,WELL WAS STATIC,BLOW DOWN TOP DRIVE. 09:30 - 12:00 2.50 DRILL P INTI RUN IN HOLE FROM 4556'TO 7300'. 12:00 - 14:00 2.00 DRILL P INTI CONTINUE TO RUN IN HOLE FROM 7300'TO 9404', ENCOUNTERED TIGHT HOLE AT 8184', PUMPED THROUGH WITH 420 GPM AND 2850 PSI,ROTATING AT 30 RPM WITH 11K FT-LBS TORQUE. 14:00 - 22:00 8.00 DRILL P INTI CIRCULATED 3 BOTTOMS UP.STAGED PUMPS UP TO 522 GPM,WITH 3800 PSI , ROTATING AT 90 RPM WITH 14K FT-LBS TORQUE. PICK UP WEIGHT=238K LBS. SLACK OFF WEIGHT= 160K LBS. ROTATING WEIGHT=187K LBS.ECD=11.19.WEIGHT UP MUD TO 10.6 PPG IN AND OUT. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 15 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 22:00 - 00:00 2.00 DRILL P INTI FLOW CHECK, PUMP OUT OF HOLE FROM 9404'TO 7941'AT 0.5 BPM AND 120 PSI. 3/14/2012 00:00 - 02:00 2.00 DRILL P INTI CIRCULATE 2 BPM AT 350 PSI AND 20 RPM WITH 7-8K FT-LBS TORQUE.WORK STRING 90'RACKING BACK ONE STAND EVERY HOUR. 02:00 - 02:30 0.50 DRILL P INTI FLOW CHECK WELL FOR 10 MINUTES, STATIC. BLOW DOWN TOP DRIVE. RUN IN HOLE FROM 7848'TO 9404'.TAGGED FILL 14' HIGH. 02:30 - 04:00 1.50 DRILL P INTI PICKED UP 20'AND SLOWLY STAGED UP PUMPS TO 530 GPM AND 3740 PSI, ROTATING AT 90 RPM WITH 12.9K FT-LBS. WASH TO TD AT 9404'. 04:00 - 06:30 2.50 DRILL P INTI CIRCULATE 3 BOTTOMS UP AT 530 GPM AND 3740 PSI,ROTATING AT 90 RPM WITH 12.9K FT-LBS TORQUE. 06:30 - 10:00 3.50 DRILL P INTI 'FLOW CHECK WELL FOR 10 MINUTES, STATIC.PULL OUT OF HOLE FROM 9404'TO 7198'ROLLING THE PUMPS AT 0.5 BPM AND 280 PSI TO PREVENT SWABBING. 10:00 - 12:00 I 2.00 DRILL P INTI PULL OUT OF HOLE ON ELEVATORS FOR 7198'TO 4300'. STRAPPING THE DRILL PIPE OUT OF THE HOLE INTO THE DERRICK. 12:00 - 13:00 1.00 DRILL P INTI CONTINUE PULLING OUT OF HOLE FROM 4300'TO 3357'. FLOW CHECKED WELL AT THE SHOE,STATIC.STRAPPING THE DRILL PIPE OUT OF THE HOLE INTO THE DERRICK. 13:00 - 14:30 1.50 DRILL P INTI SLIP AND CUT DRILLING LINE. SERVICE TOP DRIVE 14:30 - 16:30 2.00 DRILL P INTI CONTINUE PULLING OUT OF HOLE FROM 3357'TO 935'. FLOW CHECKED WELL AT BHA, STATIC.MAKE UP SAFETY JOINT. STRAPPING DRILL PIPE OUT OF THE HOLE. PERFORM KICK DRILL WHILE TRIPPING. 16:30 - 20:00 3.50 DRILL P INTI LAY DOWN 4"HEAVY WALL DRILL PIPE,5" HEAVY WALL DRILL PIPE,WELL COMMANDER CIRCULATING SUB, JARS, FLOAT SUB, NM DRILL COLLARS,ADN AND SOURCE,MWD,LWD,PWD AND BIT.BIT 'GRADE;3-4-BT-A-X-I-PN-TD. v 20:00 - 00:00 4.00 DRILL P INTI FLUSH STACK AND PULL WEAR RING.SUCK OUT STACK AND CLOSE BLIND SHEAR RAMS IN PREPERATION FOR RAM CHANGE.CLEAN RIG FLOOR OF BHA EQUIPMENT AND TOOLS. MOBILIZE 7"CASING TOOLS AND CENTRALIZERS TO THE RIG FLOOR. 3/15/2012 00:00 - 01:30 1.50 CASING P INTI RIG UP TO TEST 7"SOLID RAMS TO 250 PSI LOW AND 3500 PSI HIGH FOR FIVE MINUTES. GOOD TEST. MAKE DUMMY RUN WITH 7" MANDREL HANGER. AOGCC INSPECTOR, _ CHUCK SHEIVE,WAIVED WITNESS OF TEST 01:30 - 02:00 0.50 CASING P INTI PICK UP 4"TEST JOINT AND FUNCTION TEST THE LOWER RAMS AND ANNULAR. 02:00 - 04:00 2.00 CASING P INTI CONTINUE TO RIG UP TO RUN 7"CASING. RIG UP 350 TON ELEVATORS AND SLIPS. MAKE UP SAFETY JOINT AND CROSSOVERS FOR FOSV ON RIG FLOOR. RIG UP TORQUE TURN EQUIPMENT. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 16 of 24 Operation Summary Report Common Wet Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) ' Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 06:00 2.00 CASING P INTI MAKE UP BTC-M SHOE TRACK AND CHECK FLOATS. RUN 7",26 LB/FT, L-80 VAMTOP HC CASING FILLING EVERY JOINT, BREAKING CIRCULATION EVERY 10TH JOINT TO 412'. OPTIMUM MAKE UP TORQUE FOR 7"VAMTOP HC=11,950 FT-LBS. 06:00 - 07:30 1.50 CASING N RREP INTI REPAIR PIPE SKATE HYDRAULIC LINE. 07:30 - 13:00 5.50 CASING P INTI RUN 7",26 LB/FT L-80 VAMTOP HC CASING FILL EVERY JOINT, BREAKING CIRCULATION EVERY 10TH JOINT FROM 412'TO 3357'. 13:00 - 13:30 0.50 CASING P INTI CIRCULATE 100 BBLS AT 95/8"CASING SHOE: -2 BPM,PSI=320,FLOW=1% -3 BPM, PSI=350,FLOW=3% -6 BPM,PSI=510,FLOW=16% -7 BPM,PSI=620,FLOW=18% 13:30 - 22:00 8.50 CASING P INTI RUN 7",26 LB/FT, L-80 VAMTOP HC CASING FILL EVERY JOINT,BREAKING CIRCULATION EVERY 5 JOINTS FROM 3357'TO 7766'. 22:00 - 00:00 2.00 CASING P INTI CIRCULATE BOTTOMS UP FROM 7807'TO 8011'AT 6 BPM WHILE RUNNING JOINT 190-194.PSI=780. 3/16/2012 00:00 - 02:30 2.50 CASING P INTI RUN 7",26 LB/FT, L-80 VAMTOP HC CASING FROM 8011'TO 9404'. FILLING CASING ON THE FLY. 02:30 03:00 0.50 CASING P 1INTI MAKE UP FLUTED MANDREL HANGER. PULL 350 TON SLIPS AND RIG DOWN POWER TONGS AND TORQUE TURN EQUIPMENT. 03:00 - 10:00 7.00 CEMT` P INTI STAGE UP AND CIRCULATE 3 BPM WITH 780 PSI AND WORK DOWN TO LANDING DEPTH. STAGE UP PUMPS TO 7 BPM AND WORK CASING 20'WHILE CONDITIONING THE MUD. -UP WEIGHT=305K,DOWN WEIGHT= 175K. RIG UP CEMENT HEAD AND CEMENT LINE. SPOT SCHLUMBERGER CEMENTERS AND RIG UP HARD LINE. RIG UP TO PRESSURE TEST CEMENT HEAD AND LINE TO 250 PSI LOW,3500 PSI HIGH FOR 5 MINUTES. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 17 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date. X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10:00 - 12:00 2.00 CEMT P INTI CEMENT 7",26 LB/FT, L-80 VAMTOP HC CASING STRING. . -PJSM WITH RIG CREW,SCHLUMBERGER CEMENTERS AND CH2MHILL DRIVERS. 10:37-PUMP 30 BBLS 10.8 PPG MUDPUSH II. -5-7 BPM AND 683-700 PSI. -WORK PIPE 5-7', PIPE FREE. 10:40-DROP BOTTOM PLUG. 10:43-PUMP 155 BBL 11 PPG LITECRETE LEAD CEMENT AT 5-8 BPM AND 1050-1218 PSI. -YIELD=1.86 CUFT/SK -MIX WATER RATIO=6.259 GAUSK 11:10-PUMP 39 BBL 15.8 PPG'G'WITH GASBLOK TAIL CEMENT_ AT 5-8 BPM AND 1250 PSI. -YIELD=1.17 CUFT/SK. ty,j -MIX WATER RATIO=5.213. 11:18-DROP TOP PLUG. re/ ? 11:22-PUMP 5 BBL FRESH WATER. 11:24-SWAP TO RIG PUMPS. O 11:27-DISPLACE WITH 351.3 BBLS OF 10.6 I PPG LSND MUD: 12:15-BUMP PLUG AT 3497 STROKES; ,PRESSURE UP TO 1750 PSI. 12:00 - 13:00 1.00 CEMT P INTI CHECK FLOATS,FLOATS HELD, RIG UP AND TEST 7"CASING TO 250 PSI LOW FOR 5 MINUTES AND 3500 PSI HIGH FOR 30 MINUTES. 13:00 - 14:30 1.50 WHSUR P INTI RIG UP AND INJECT DOWN 9.5/8"X 7" ANNULUS. INJECT 5 BBLS AFTER BREAKING OVER AT 1200 PSI.LEVELED OUT 970 PSI. 14:30 - 17:00 2.50 WHSUR P INTI INSTALL PACK OFF AND RIG DOWN CEMENT HEAD. REMOVE ALL TOOLS FOR HANDLING 7"OFF OF THE RIG FLOOR. 17:00 - 18:30 1.50 WHSUR P INTI TEST PACK OFF TO 250 PSI LOW FOR 15 MINUTES AND 5000 PSI HIGH FOR 30 MINUTES. LOAD BHA#5 COMPONENTS AND 4"DRILL PIPE INTO THE PIPE SHED. INJECT DOWN THE 9-5/8"X 7"ANNULUS 2 BBLS EVERY HOUR. 18:30 - 19:00 0.50 DRILL P INTI MOBILIZE BHA#5 SHORT TOOLS TO THE RIG FLOOR. 19:00 - 00:00 5.00 DRILL P INTI MAKE UP BHA PER DIRECTIONAL DRILLER AND BHA#5. 3/17/2012 00:00 - 01:00 1.00 DRILL P INTI CONTINUE TO PICK UP AND MAKE UP BHA #5,INTERMEDIATE BUILD ASSEMBLY. 01:00 - 05:30 4.50 DRILL P INTI RUN IN THE HOLE WITH BHA#5 ON 4"DRILL PIPE TO 3415'. PICKING UP SINGLES FROM THE PIPE SHED. CONTINUE INJECTING DOWN THE ANNULUS EVERY HOUR. PRESSURE TO INJECT BUILT UP TO 1750 PSI TOWARDS MIDNIGHT. INJECTION PRESSURES HAVE DECREASED SINCE THEN TO 850 PSL 05:30 - 11:00 5.50 DRILL P INTI RUN IN THE HOLE WITH STANDS FROM THE DERRICK FROM 3415'TO 5467'. �4' 2g 11:00 - 11:30 0.50 DRILL P INTI MAKE UP RTTS,RUN IN THE HOLE AND SET rh RTTS AT 98'. �1 11:30 - 12:00 0.50 DRILL P INTI RACK STAND BACK IN THE DERRICK AND LAY DOWN RUNNING TOOL. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 18 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current©90.30ft(above Mean Sea Level) Date I From-To Hrs I Task Code NPT NPT Depth! Phase Description of Operations (hr) (ft) 12:00 - 13:00 1.00 DRILL P INTI RIG UP AND TEST RTTS TO 250 PSI LOW AND 1000 PSI HIGH FOR 5 MINUTES EACH. 13:00 - 15:00 2.00 BOPSUR P INTI CHANGEOUT 7"RAMS TO 3-1/2"X 6"RAMS. CHANGEOUT XT-39 SAVER SUB. 15:00 - 17:00 2.00 BOPSUR P INTI RIG UP AND TEST BOPE WITH 4"AND 4-1/2" TEST JOINTS,2 XT-39 FULL OPENING SAFETY VALVES,ONE 3-1/2"IF FULL OPENING SAFETY VALVE AND A XT DART VALVE. 17:00 - 19:00 2.00 BOPSUR P INTI FREEZE PROTECT 9-5/8"X 7"ANNULUS WITH 60 BBLS OFDEAD CRUDE. -2.75 BPM,_1100 PSI. -BLEED BACK 15 BBLS. 19:00 - 00:00 5.00 BOPSUR P INTI CONTINUE BOPE TEST WITH 4"AND 4-1/2" TEST JOINTS. SUPER CHOKE WASHED OUT. CONTINUE TO TEST BOPE AND GET MECHANIC OUT TO RE-DRESS THE SUPER CHOKE. 3/18/2012 00:00 - 04:30 4.50 BOPSUR P INTI CONTINUE BOPE TEST WITH 4"AND 4-1/2" TEST JOINTS TOP AND BOTTOM RAMS. RE-DRESS AND RE-TEST THE SUPER CHOKE. THE SUPER CHOKE WASHED OUT, REPLACE SEAT AND STEM. 04:30 - 05:30 1.00 BOPSUR P INTI BLOW DOWN AND RIG DOWN BOPE TEST EQUIPMENT. CLEAR THE RIG FLOOR OF TOOLS AND SET WEAR RING. 05:30 - 07:00 1.50 WHSUR P INTI RIG UP RTTS RETRIEVAL TOOL AND RUN IN THE HOLE 98'. FIRST ATTEMPT TO SCREW IN TO RTTS FAILED. PUMP DOWN DRILL STRING AT 6 BPM,260 GPM AND CLEAN OUT RTTS PROFILE. SCREW INTO TIW AND SHUT ANNULAR,CHECK PRESSURES. RELEASE AND PULL RTTS TO THE RIG FLOOR. 07:00 - 07:30 0.50 WHSUR P INTI LAY DOWN RTTS AND BLOW DOWN LINES. -FIRE DRILL-RESPONSE TIME 2 MINUTES 14 SECONDS. 07:30 - 11:30 4.00 DRILL P INTI RUN IN THE HOLE FROM 5373'TO 9200'. FILLING PIPE EVERY 20 STANDS. -PUMP 234 GPM,2110 PSI. CHANGE OUT 3 JOINTS OF 4"DRILL PIPE THAT HAVE ABRASIONS IN SLIP AREA OF TUBE. CHANGE TALLY WITH NEW JOINTS PICKED UP. 11:30 - 14:00 2.50 DRILL P INTI RUN IN THE HOLE FROM 9200'AND TAG CEMENT AT 9309'. RACK BACK 1 STAND AND CIRCULATE SURFACE TO SURFACE. -PUMP 235 GPM,2200 PSI. -PUW=220K,SOW= 130K, ROT=162K. -RPM=30,TORQUE=14K. 14:00 - 15:00 1.00 CASING N HMAN INTI RIG UP AND TEST 7"CASING to 3500 PSI FOR 30 MINUTES. 15:00 - 16:00 1.00 DRILL P INTI MADD PASS FROM 9200'TO 9309' -GPM=250,PSI=1890. 16:00 - 17:00 1.00 DRILL P INTI DRILL OUT FLOAT EQUIPMENT AND CEMENT TO 9389'. -GPM=250, PSI ON=2250,PSI OFF=2200. -PUW=235K,SOW=145K,ROT=165K. -RPM=30,TORGUE ON=13K,OFF=10K, WOB=10K. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 19 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay f Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. 1 UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) II — 17:00 - 18:30 1.50 DRILL P INTI DISPLACE WELL TO 8.6 PPG SOLIDS FREE POWERPRO SF DRILLING FLUID. -RPM=30,TORQUE= 11K. -GPM=250,PSI=1300. 18:30 - 21:30 3.00 DRILL P INTI DRILL OUT REMAINING CEMENT,SHOE AND 20'OF NEW HOLE TO 9424'. -PUW=225K,SOW= 145K. -RPM=30, PSI ON=1350, OFF= 1220. -WOB=10K. 21:30 - 22:30 1.00 DRILL P INTI CIRCULATE BOTTOMS UP. -GPM=250, PSI= 1230. -RPM=30,TORQUE=9K. f‘‹ -PUW=225K,SOW= 145K. -FIRE DRILL. 22:30 - 00:00 1.50 DRILL P INTI PERFORM FIT. -AST=.56,ART=0,ADT=0,JARS= .56, BIT .56. 1%52 3/19/2012 00:00 - 01:00 1.00 DRILL P INTI RIG UP FOR FIT. PUMP AIR OUT OF LINES AND ZERO STROKE COUNTERS. FUNCTION HCR AND KILL LINE FROM REMOTE PANEL. 01:00 - 01:30 0.50 DRILL P INTI PRESSURE UP 1310 PSI,TOOK 21 STROKES. ✓ HOLD FOR 20 MINUTES AND RECORD. FINAL PRESSURE 40 PSI. 01:30 - 02:00 0.50 DRILL P PROD1 RIG DOWN EQUIPMENT,BLOW DOWN LINES. 02:00 - 02:30 0.50 DRILL P PROD1 RUN IN THE HOLE FROM 9383'TO 9424'. -SPILL DRILL RESPONSE TIME=56 SECONDS. 02:30 - 12:00 9.50 DRILL P PROD1 DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION HOLE FROM 9424'TO 9595'. -PUW=220K,SOW= 140K. -GPM=250 GPM, PSI ON= 1470, PSI OFF= 1290. -WOB=25K. SLOW PUMP RATES: -TMD=9386',TVD=8670'. -PUMP 1 --20 SPM 300 PSI;30 SPM 420 PSI. -PUMP 2--20 SPM 300 PSI;30 SPM 420 PSI. ART=0 HRS;AST=6.54 HRS;ADT=6.54 HRS;JARS=7.1 HRS. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 20 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code ! NPT NPT Depth Phase Description of Operations (hr) I 1 (ft) 12:00 - 00:00 12.00 DRILL P PROD1 DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION HOLE FROM 9525'TO 10112'. I -PUW=220K,SOW= 137K, ROT= 170. GPM=250 GPM, PSI ON= 1520, PSI OFF= I 1360. I -RPM=80,TORQ. ON=12K, OFF= 11K. -WOB=25K. -D2 KICK DRILL RESPONSE TIME= 105 , SECONDS. SLOW PUMP RATES: -TMD=9852',TVD=8143'. -PUMP 1 --20 SPM 390 PSI;30 SPM 520 PSI. -PUMP 2--20 SPM 370 PSI;30 SPM 510 PSI. I ART=3.01 HRS;AST=4.21 HRS;ADT=7.22 ! HRS;JARS=14.79 HRS. 3/20/2012 00:00 - 12:00 12.00 DRILL P PROD1 DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION 1 1 HOLE FROM 10112'TO 10602'. -PUW=215K,SOW= 140K, ROT= 170K. I I -GPM=250 GPM, PSI ON= 1550, PSI OFF= 1360. j RPM=80,TORQ.ON=12K, OFF=11K. -WOB=25K. I I SLOW PUMP RATES TAKEN AT 03:43: -TMD=10320',TVD=8983'. -PUMP 1 --20 SPM 410 PSI;30 SPM 560 PSI. -PUMP 2--20 SPM 420 PSI;30 SPM 570 I 'PSI. ART=5 HRS;AST=2.52 HRS;ADT=7.52 HRS;JARS=22.3 HRS. 12:00 - 00:00 12.00 DRILL P I PROD1 DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION HOLE FROM 10602'TO 11159'. -PUW=200K,SOW=135K, ROT=166K. -GPM=250 GPM, PSI ON= 1680, PSI OFF= 1490. -RPM=80,TORQ.ON= 12K, OFF= 12K. I -WOB=25K. SLOW PUMP RATES TAKEN AT 15:35: -TMD= 10785',TVD=8962'. -PUMP 1 --20 SPM 500 PSI;30 SPM 620 PSI. -PUMP 2--20 SPM 500 PSI;30 SPM 620 PSI. ART=3.97 HRS;AST=2.32 HRS;ADT=6.29 HRS;JARS=29.35 HRS, BIT=29.35 HRS. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 21 of 24 Operation Summary Report Common Well Name:Z-40 AFE No r Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. 1UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date I From-To Hrs Task Code I NPT NPT Depth Phase Description of Operations 3/21/2012 00:00 04:30 4.50 DRILL P O PROD1 DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION HOLE FROM 11159'TO 11373'. -PUW=205K,SOW= 135K, ROT= 168K. -GPM=250 GPM, PSI ON= 1640, PSI OFF= 1480. RPM=80,TORQ. ON= 13K, OFF= 12K. -WOB=30K. STARTED SEEING ROP DECREASE FROM 30-40'/HR AVG TO 5-20'/HR AVG ALONG WITH ERRATIC TORQUE OF 12-15K OFF BOTTOM WHEN ROTATING,ALSO INCREASING STICKSLIP. SLOW PUMP RATES TAKEN AT 00:50: -TMD= 11252',TVD=8906'. -PUMP 1 --20 SPM 550 PSI;30 SPM 680 PSI. -PUMP 2--20 SPM 520 PSI;30 SPM 660 PSI. 04:30 - 05:30 1.00 DRILL P PROD1 CIRCULATE BOTTOMS UP AT 250 GPM WITH 1550 PSI. -MUDWTINANDOUT8.7PPG 05:30 08:00 2.50 DRILL P PROD1 PULL OUT OF THE HOLE FOR BIT CHANGE OUT FROM 11373'TO 9387'. 10 MINUTE FLOW CHECK AT THE SHOE. -MUDWTINANDOUT8.7PPG 08:00 - 13:30 5.50 DRILL P PROD1 PULL OUT OF THE HOLE FROM 9387'TO 239'. -KICK WHILE TRIPPING DRILL RESPONSE TIME= 161 SECONDS. -FIRE DRILL RESPONSE TIME= 130 SECONDS. 13:30 - 15:30 2.00 DRILL P PROD1 10 MINUTE FLOW CHECK BEFORE PULLING BHA OUT OF THE HOLE. NO FLOW RACK BACK COLLARS, CHANGE OUT ADN. CHANGE OUT MOTOR,CHANGE OUT BIT. 15:30 - 17:00 1.50 DRILL P PROD1 RUN IN THE HOLE WITH BHA#6,INSTALL RADIOACTIVE SOURCES ON THE WAY. 17:00 - 00:00 7.00 DRILL P PROD1 RUN IN THE HOLE WITH BHA#6 ON 4"DRILL PIPE FILLING EVERY 20 STANDS. . SHALLOW TEST AT 1000' -D1 KICK DRILL RESPONSE TIME= 130 SECONDS. 3/22/2012 00:00 - 02:00 2.00 DRILL P PROD1 PJSM,SLIP AND CUT DRILLING LINE. 02:00 - 02:30 0.50 DRILL P PROD1 RECALIBRATE THE DEPTH TRACKING ON TOTCO. INSPECT THE STAND PIPE CONNECTIONS. 02:30 - 03:00 0.50 DRILL P PROD1 GREASE THE BLOCKS AND TOP DRIVE. 03:00 - 05:00 2.00 DRILL P PROD1 'CONTINUE TO RUN IN THE HOLE FROM 9107' TO 11168'. FILLING THE PIPE EVERY 20 STANDS. 05:00 - 06:00 1.00 DRILL P PROD1 REAM DOWN FROM 11168'TO 11373'. -PUMP 250 GPM WITH 1540 PSI. -RPM=80,TORQUE=7K. -SOW=145K,PUW=200K, ROT=170K. -ROP=250-300 FT PER HOUR. SLOW PUMP RATES TAKEN AT 05:30: -TMD= 11256',TVD=8904'. -PUMP 1 --20 SPM 550 PSI;30 SPM 710 PSI. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 22 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) I Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:00 - 12:00 6.00 DRILL P PROD1 DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION HOLE FROM 11373'TO 11460'. -PUW=200K,SOW= 140K, ROT= 170K. -GPM=250 GPM, PSI ON= 1640, PSI OFF= 1540. -RPM=80,TORQ.ON= 13K,OFF= 12K. WOB= 15K. OAST=2.7 HRS;ART=0 HRS;ADT=2.7 HRS. 12:00 - 00:00 12.00 DRILL P PROD' DIRECTIONALLY DRILL IN 6-1/8"PRODUCTION HOLE FROM 11460'TO 11627'. -PUW=210K,SOW= 135K, ROT= 170K. -GPM=250 GPM, PSI ON=1730, PSI OFF= 1640. RPM=40,TORQ. ON=9K, OFF=7K. -WOB=15K. -SPILL DRILL RESPONSE TIME= 105 SECONDS AST=5.64 HRS;ART=0.64 HRS;ADT=6.28 HRS;JARS=40.7 HRS; BIT=8.98 HRS. SLOW PUMP RATES TAKEN AT 14:30: -TMD= 11535',TVD=8940'. -PUMP 1 --20 SPM 560 PSI;30 SPM 630 PSI. -PUMP 2--20 SPM 560 PSI;30 SPM 620 PSI. 3/23/2012 00:00 - 09:00 9.00 DRILL P PROD1 DIRECTIONALLY DRILL 6-1/8"PRODUCTION HOLE FROM 11627'TO 11880'. -PUW=225K,SOW= 145K, ROT= 170K. -GPM=250 GPM, PSI ON= 1730, PSI OFF= 1610. -RPM=40.TORQ. ON=9K, OFF=9K -WOB=20K -SPILL DRILL RESPONSE TIME= 109 SECONDS. AST=2.15 HRS;ART=3.32 HRS;ADT=5.47 HRS;JARS=46.2 HRS;BIT=14.5 HRS. 09:00 - 10:30 1.50 DRILL P PROD1 CIRCULATE BOTTOMS UP X 2. BOTTOMS UP STROKES=5246. 10 MINUTE FLOW CHECK. WELL STATIC 10:30 - 11:30 1.00 DRILL P PROD1 MAD PASS FROM 11880'TO 11814'. -GPM=250,PSI=1540. -RPM=30,TORQ.=7K. -BLOW DOWN TOP DRIVE -PULL OUT OF THE HOLE ON ELEVATORS FROM 11,814'TO 11,430'. -MW OUT 8.6-PPG,MW IN 8.6-PPG 11:30 - 20:30 9.00 DRILL P PROD1 MAD PASS FROM 11,430'TO 10,520'. WORK AND WIPE THROUGH TIGHT AREA AT 10,580' -GPM=250, PSI= 1540. -RPM=30,TORQ.=7K. MAD PASS FROM 10,465'TO 9,865'. -GPM=250, PSI=1540. -RPM=30,TORQ.=7K. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 23 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date: 2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site: PB Z Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT I NPT Depth Phase Description of Operations (hr) _ (ft) 20:30 - 21:30 1.00 DRILL P , PROD1 PUMP OUT OF THE HOLE, NO ROTATING DUE TO DLS>12/100 FROM 9,865'TO ABOVE ' 7"SHOE AT 9,399' 1 _ -GPM=250, PSI= 1,540. 21:30 - 23:30 2.00 DRILL P PROD1 DROP 1.760-IN OD BALL TO OPEN WELL COMMANDER CIRCULATION SUB. I PRESSURE UP TO 1,000-PSI AND HOLD BRIEFLY. PRESSURE TO 2,280 PSI AND OBSERVE VALVE SHIFT OPEN. STAGE UP PUMPS INCREMENTALLY TO I RATE: I -GPM=270, PSI=780. • I -GPM=350, PSI= 1090. -GPM=450, PSI= 1490. -GPM=500, PSI= 1770. RPM=60,ROT WT= 170K, FREE TORQ. =5K. MONITOR WELL FOR 10 MINUTES. DROP 1.760-IN OD BALL TO CLOSE CIRCULATION SUB, HOLD 1,000-PSI BRIEFLY.CONTINUE TO PRESSURE UP TO 2,380-PSI OBSERVE VALVE SHIFT CLOSED.VERIFY COMMUNICATION WITH MWD/LWD TOOLS I I I BLOW DOWN TOP DRIVE. MONITOR WELL (STATIC) -WITH PUMPS ON: PUW= 186K,SOW= 152K. 1 -DURING CIRCUALTION, FIRST BOTTOMS UP 1 I OBSERVE BRIEF 20-30%INCREASE IN CUTTINGS. SECOND BOTTOMS UP SAW I I MINIMAL INCREASE.CIRCULATE 2-1/2 I BOTTOMS UP TOTAL UNTIL CASING IS CLEAN. 123:30 - 00:00 I 0.50 DRILL P PROD1 RUN IN THE HOLE ON 4"DRILL PIPE FROM 9,386'TO 10,507'. 1 l TRIP GOOD NO ISSUES. MW IN 8.6-PPG,MW OUT 8.6-PPG 3/24/2012 00:00 - 01:30 1.50 DRILL P PROD1 RUN IN THE HOLE FROM 10507'TO 11880'. , I FILL PIPE EVERY 20 STANDS. MUD WT IN=8.6PPG;OUT=8.6 PPG -DID NOT ENCOUNTER ANY TIGHT SPOTS. 01:30 - 03:00 • 1.50 DRILL P PROD1 TAG BOTTOM AT 11,880', NO FILL ON BOTTOM. CIRCULATE AND CONDITION HOLE I i '250-GPM WITH 1660-PSI,30-RPM WITH I 7K-TORQ. CLEAN PITS AND PREPARE FOR DISPLACEMENT TO OIL BASED MUD. -PUW=220K,SOW=155K,ROT=175K 03:00 - 05:00 2.00 DRILL P ' PROD1 PJSM FOR DISPLACEMENT TO OIL BASED MUD WITH CH2,MI REPRESENTATIVE,WSL AND RIG CREW. -PUMP 40 BBLS OF 8.6 WATER BASED SPACER. -PUMP 50 BBLS 9.8 PPG OIL BASED MUD SPACER. I I DISPLACE HOLE WITH 397 BBLS OF 8.7 PPG RELIANT NT OIL BASED MUD. RACK BACK ' ONE STAND. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 24 of 24 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: DRL-ONSHORE(DON) Start Date:2/22/2012 End Date: X3-00Y53-C: (5,628,686.00) Project:Prudhoe Bay Site:PBZ Pad Rig Name/No.: DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task 1 Code NPT NPT Depth Phase Description of Operations (hr) (ft) 05:00 - 06:30 , 1.50 DRILL P � PROD1 CLEAN SURFACE EQUIPMENT OF WATER BASED MUD. BLOW DOWN TOP DRIVE RECIPROCATE PIPE. 06:30 - 08:00 1.50 DRILL P PROD1 CIRCULATE BOTTOMS UP;255 BBLS. -GPM=250,-PSI=2510. RPM=40,TORQ. =8K. '-PUW=225K,SOW= 145K, ROT= 175K. 10 MINUTE FLOW CHECK,NO FLOW. SLOW PUMP RATES TAKEN AT 06:47: I -TMD= 11803',TVD=9079'. -PUMP 1 --20 SPM 250 PSI;30 SPM 510 PSI. -PUMP 2--20 SPM 250 PSI;30 SPM 500 1 PSI. 08:00 - 10:30 2.50 j DRILL P PROD1 BLOW DOWN TOP DRIVE AND PULL OUT OF THE HOLE ON ELEVATORS FROM 11814'TO 9385'. -NO OVERPULLS NOTED. 10:30 - 12:00 1.50 DRILL P 1 PROD1 ACTIVATE WELL COMMANDER CIRCULATING SUB. -DROP 1.76"ACTIVATION BALL,OPENED AT 2900 PSI. CIRCULATE 500 GPM AT 3750 PSI, 20 RPM.5K TORQ. CIRCULATED 214 BBLS. 1 j -DROP 2ND 1.76"ACTIVATION BALL AND CLOSE WELL COMMANDER WITH 3400 PSI. 10 MINUTE FLOW CHECK,NO FLOW. 12:00 - 16:30 4.50 DRILL P PROD1 BLOW DOWN TOP DRIVE, FILL TRIP TANK, PULL OUT OF THE HOLE FROM 9385'TO 300' FLOW CHECK WELL FOR 10 MINUTES I I 1 (BEFORE PULLING BHA OUT OF THE HOLE. 'NO FLOW. 16:30 - 19:00 2.50 DRILL P , PROD1 PJSM ON PULLING RADIOACTIVE SOURCE 1 AND BHA OUT OF THE HOLE. RACK BACK LAST STAND OF 4"DRILL PIPE, LAY DOWN i (JARS,3 NON MAG DRILL COLLARS, PULL SOURCE TO THE RIG FLOOR, LAY DOWN ILWD, MWD, NON MAG FLEX PONY COLLARS NON MAG STABILIZERS, MUD MOTOR. DRAIN AND REMOVE BIT. -DULL BIT GRADE: 1 -1 -WT-A-E-1 CT- TD. Printed 4/9/2012 10:30:54AM North America -ALASKA- BP Page 1 of 6 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: COM-ONSHORE(CON) Start Date:3/13/2012 End Date: 3/30/2012 X3-00Y53-C:(3,015,895.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 3/24/2012 19:00 - 20:00 1.00 DRILL P PROD1 CLEAN AND CLEAR RIG FLOOR OF ALL TOOLS NOT NEEDED FOR UPCOMING OPERATIONS. 20:00 - 00:00 4.00 DRILL P PROD1 RIG UP TO RUN 4-1/2",12.6#13 CR,VAM TOP LINER. I-REMOVE ELEVATORS,CHANGE OUT BAILS. -INSTALL:COMPENSATOR,AIR HOSE, SINGLE JOINT ELEVATORS,4-1/2" ELEVATORS. -RIG UP CASING TONGS. FUNCTION TEST BLIND RAMS,3-1/2"X 6" RAMS,2-7/8"X 5"RAMS,ANNULAR, HCR KILL, HCR CHOKE. ARRANGE JEWELRY IN THE PIPESHED, MOBILIZE PUP JOINTS TO THE RIG FLOOR. 3/25/2012 00:00 - 01:30 1.50 CASING P RUNPRD CONTINUE TO RIG UP TO RUN 4-1/2", 12.6# 13 CR,VAM TOP LINER. -MOBLIZE PUP JOINTS TO RIG FLOOR. -VERIFY LINER EQUIPMENT IN PIPESHED IS IN THE CORRECT RUNNING ORDER. 01:30 - 12:00 10.50 CASING P RUNPRD PJSM WITH RIG CREW,WSL,BAKER REPRESENTATIVE,HALLIBURTON REPRESENTATIVES AND CASING CREW. RUN 4-1/2", 12.6#,13CR,VAMTOP LINER AS FOLLOWS: -BAKER-LOK ALL CONNECTIONS BELOW THE FIRST SWELL PACKER. -FILL AND CHECK FLOATS-FLOATS HELD. -TORQUE ALL VAMTOP CONNECTIONS TO 4400 FT-LBS. -(1)3-1/2"SWELL PACKER ASSEMBLY. -BAKER LOCATOR SUB. -(12)4-1/2"SWELL PACKER ASSEMBLIES. -(9)4-1/2"SLIDING SLEEVE ASSEMBLIES. CENTRALIZERS (1)CENTRALIZER LOCKED 5'FROM SHOE (1)6"CENTRALIZER LOCKED DOWN WITH A STOP RING ON THE BOX END CLOSEST TO EACH SWELL PACKER (1)CENTRALIZER LOCKED DOWN EACH SIDE OF SLIDING SLEEVES (1)CENTRALIZER FREE FLOATING ON JOINTS#2-31. _ 12:00 - 13:00 1.00 CASING P RUNPRD CHANGE OUT THE ELEVATOR LINKS AND INSTALL THE 3.5"ELEVATORS. 13:00 - 13:30 0.50 CASING P RUNPRD FINISH MAKING UP THE 4.5"12.6#VAM TOP LINER AS FOLLOWS: LINER HANGER SEAL BORE CROSS-OVER BUSHING BAKER 5"X 7"FLEX-LOCK. LINER HANGER RS PACKOFF SEAL NIPPLE BAKER 5"X 7"HRD-E ZXP PACKER(11.24'X 5.25"TIEBACK) Printed 4/9/2012 10:31:22AM North America -ALASKA- BP Page 2 of 6 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: COM-ONSHORE(CON) Start Date: 3/13/2012 End Date: 3/30/2012 X3-00Y53-C: (3,015,895.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Firs Task Code NPT NPT Depth I Phase Description of Operations (hr) (ft) 13:30 - 14:30 1.00 CASING P RUNPRD I PICK UP ONE STAND OF DRILL PIPE AND CIRCULATE 40 BBLS AT 84 GPM,400 PSI WHILE ALLOWING PAL MIX TO SET UP. -UP WT.83K,DOWN WT.80K. 14:30 - 00:00 9.50 CASING P RUNPRD RUN IN THE HOLE WITH 4"DRILL PIPE FROM 2672'TO 9391'. FILL PIPE EVERY 10 STANDS. PUW=195K,SOW= 143K. 3/26/2012 00:00 - 01:30 1.50 CASING P RUNPRD CIRCULATE 200 BBLS AT THE 7"CASING SHOE,106 GPM AND 480 PSI. BLOW DOWN TOP DRIVE. -PUW=185K,SOW=145K. 01:30 - 08:00 6.50 CASING P RUNPRD CONTINUE TO RUN 4-1/2"LINER IN THE HOLE WITH 4"DRILL PIPE. FILL PIPE EVERY 10 STANDS FROM 9,391'AND TAG BOTTOM AT 11880' -PICK UP 2'AND RUN IN TO TAG BOTTOM AND VERIFY. 08:00 - 09:00 1.00 CASING P RUNPRD DROP SETTING BALL AND WAIT 60 MINUTES FOR BALL TO SEAT IN THE HRD-E RUNNING TOOL. 09:00 - 10:00 1.00 CASING P RUNPRD STAGE PUMPS UP TO 0.5-BPM,BALL SEATED AT 170 STROKES WITH 2,700-PSI. SLACK OFF LINER WEIGHT AND AN ADDITIONAL 30K LBS TO CONFIRM LINER IS SET. PRESSURE UP TO 4,200-PSI AND RELEASE LINER FROM RUNNING TOOL. PICK UP 6'TO EXPOSE DOG SUB. SET DOWN 60K LBS.AND SET ZXP LINER TOP PACKER. PICK UP AND REPEAT WITH 15-RPM TO CONFIRM PACKER SET. ✓ LINER SHOE AT 11,878'MD.TOP OF LINER AT 9,213'MD 10:00 - 10:30 0.50 CASING P RUNPRD LAY DOWN A SINGLE JOINT OF 4"DRILL PIPE. BLOW DOWN TOP DRIVE. RIG UP TO TEST LINER TOP PACKER. 10:30 - 13:00 2.50 CASING P RUNPRD TEST LINER TOP PACKER TO 250 PSI LOW FOR 5 CHARTED MINUTES/3,500-PSI HIGH FOR 30 CHARTED MINUTES LOST 85-PSI IN FIRST 15 MINUTES,25-PSI IN SECOND 15 MINUTES;JEST PASS. BLEED OFF PRESSURE,BLOW DOWN EQUIPMENT AND RIG DOWN TESTING EQUIPMENT. 13:00 - 16:00 3.00 CASING P RUNPRD PUMP 94-BBLS FLOWZAN SPACER. DISPLACE WELL FROM 8.6-PPG OIL BASED MUD TO 8.5-PPG SEA WATER. PUMP 6 BPM WITH 1250-PSI ICP AND 900-PSI FCP. CLEAN UNDER SHAKERS AND FILL THE TRIP TANK. 16:00 - 17:00 1.00 CASING P RUNPRD PULL 4"DRILL PIPE OUT OF THE HOLE FROM 9,213 TO 8,120'. MOVE 13 STANDS FROM OFF DRILLERS SIDE TO DRILLER SIDE IN PREPARATION OF UPCOMING RIG MOVE. -SPILL DRILL RESPONSE TIME=60 SECONDS. 17:00 - 18:30 1.50 CASING P RUNPRD CUT AND SLIP DRILLING LINE. 18:30 - 19:30 1.00 CASING P RUNPRD SERVICE AND INSPECT:TOP DRIVE, BLOCKS,DRAWWORKS. -KICK WHILE TRIPPING DRILL RESPONSE TIME=48 SECONDS. Printed 4/9/2012 10:31:22AM North America -ALASKA- BP Page 3 of 6 Operation Summary Report Common Well Name:Z-40 AFE No Event Type:COM-ONSHORE(CON) Start Date:3/13/2012 End Date:3/30/2012 X3-00Y53-C:(3,015,895.00) Project: Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: • Rig Release: Rig Contractor: DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(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 RUNPRD PULL OUT OF THE HOLE FROM 8120'TO 2989'. LAY DOWN SINGLE4"DRILL PIPE JOINTS TO PIPE SHED. 3/27/2012 00:00 - 03:30 3.50 EVAL P RUNPRD LAY DOWN 4"DRILL PIPE TO THE PIPE SHED FROM 2,989'TO SURFACE -D-1 DRILL RESPONSE TIME=151 SECONDS. 03:30 - 04:00 0.50 EVAL P RUNPRD LAY DOWN LINER HANGER RUNNING ASSEMBLY. VERIFY DOG SUB SHEARED. 04:00 - 04:30 0.50 EVAL P RUNPRD PJSM WITH SCHLUMBERGER WIRELINE AND RIG CREW. MOBILIZE EQUIPMENT AND TOOLS TO THE RIG FLOOR FOR USIT LOGGING. 04:30 - 05:00 0.50 EVAL P RUNPRD RIG UP SCHLUMBERGER WIRELINE FOR USIT LOGS. • 05:00 - 12:00 7.00 EVAL P RUNPRD MAKE UP WIRELINE USIT TOOLS,ORIENT TOOL AND RUN IN THE HOLE. PERFORM MP2 ON MUD PUMPS,CHARGE PULSATION DAMPENER AND CLEAN RIG. -TABLE TOP MAN DOWN DRILL. 12:00 - 15:00 3.00 EVAL P RUNPRD CONTINUE LOGGING WHILE PULLING OUT OF THE HOLE FROM 6,200'. 15:00 - 17:30 2.50 EVAL P RUNPRD RIG DOWN LOGGING TOOLS AND EQUIPMENT. -CLEAN AND CLEAR RIG FLOOR. 17:30 - 21:00 3.50 RUNCOM P RUNCMP RIG UP TO RUN 4-1/2"12.6 LB-FT,13CR VAM TOP TUBING. -REMOVE 4"ELEVATORS AND SHORT BAILS. -INSTALL:COMPENSATOR SUB, COMPENSATOR,SINGLE JOINT ELEVATORS, LONG BAILS. -STAGE I-WIRE CLAMPS TO THE RIG FLOOR. -PJSM WITH HALLIBURTON 'REPRESENTATIVES,SCHLUMBERGER REPRESENTATIVES,WSL,DOYON CASING 'AND RIG CREW. 21:00 - 00:00 3.00 RUNCOM P RUNCMP RUN 4-1/2"12.6 LB-FT 13CR VAM TOP TUBING PER WELL PROGRAM. APPLY JET LUBE SEAL GUARD THREAD COMPOUND. TORQUE TURN TO OPTIMUM MAKE UP OF 4440 FT-LBS. -BAKERLOK ALL CONNECTIONS BELOW THE HES TNT PACKER. 3/28/2012 00:00 - 18:00 18.00 RUNCOM P RUNCMP RUN 4-1/2"12.6#13CR VAM TOP TUBING PER WELL PROGRAM FROM 271'TO 9,139'. APPLY JET LUBE SEAL GUARD THREAD COMPOUND. TORQUE TURN TO OPTIMUM MAKE UP OF 4,440 FT-LBS.TEST I-WIRE EVERY 1,000'. 18:00 - 19:00 1.00 RUNCOM P RUNCMP RECORD PICK UP SLACK OFF WEIGHTS AT 9,175'PRIOR TO ENTRANCE INTO TOP OF 4-1/2"TBR.PU 165,SO 135 CONTINUE TO PICK UP JOINTS#210,211,212. TAG NO-GO AT 9,235'VERIFY JOINT COUNT IN PIPE SHED AND PREFORM SPACE-OUT UD JOINTS #210,211,212.PICK UP SPACE-OUT PUPS AND INSTALL UNDER JOINT#210.PICK UP LANDING JOINT WITH HANGER. Printed 4/9/2012 10:31:22AM North America -ALASKA- BP Page 4 of 6 Operation Summary Report Common Well Name:Z-40 AFE No Event Type: COM-ONSHORE(CON) Start Date: 3/13/2012 End Date: 3/30/2012 X3-00Y53-C:(3,015,895.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To i Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 19:00 - 20:00 1.00 RUNCOM P RUNCMP TERMINATE I-WIRE AND VERIFY COMMUNICATION. BHP 3,737-PSI. BHT 194.71 DEG FAHRENHITE -LAND HANGER AND VERIFY RKB CORRECT. FIRE DRILL HELD.CRT 75-SEC 20:00 - 21:00 1.00 RUNCOM P RUNCMP RILDS ON HANGER WITH FMC SERVICE REPRESENTATIVE. -INSTALL ON OA VALVE COMPANION FLANGE,NEEDLE VALVE AND GAUGE.TEST TO 3,500-PSI.TEST GOOD. 21:00 - 00:00 3.00 RUNCOM P RUNCMP 'PJSM-HAZARDASSESSMENT, DISPLACE WELL TO 9.2-PPG BRINE. SPOT CORROSION INHIBITOR. PUMP 20-BBL'S SEAWATER DOWN TBG, -REVERSE CIRCULATE 150-BBL'S,9.2-PPG 120-DEG BRINE,70-BBL'S WITH CORROSION INHIBITOR,CHASE WITH 105-BBL'S BRINE. PUMP 5-BBL DOWN TUBING TO FLUSH RHC PROFILE 4-BPM,420-PSI. 3/29/2012 00:00 - 02:30 2.50 RUNCOM P , RUNCMP INSTALL LANDING JOINT AND DROP BALL AND ROD. SET PACKER.TEST TUBING 250-PSI LOW 5 _CHARTED MINUTES,3,500-PSI HIGH 30 CHARTED MINUTES.TEST GOOD.BLEED TUBING PRESSURE TO 1,500-PSI. 1`,1` -TEST 4-1/2"X 7"ANNULUS 250-PSI LOW FOR 5 CHARTED MINUTES,3,500-PSI HIGH 30 CHARTED MINUTES.TEST GOOD BLEED ANNULUS PRESSURE TO ZERO,BLEED TUBING TO ZERO. **OBTAIN WTL APPROVAL TO PROCEED WITH OPERATIONS** 02:30 - 03:30 1.00 RUNCOM P RUNCMP RIG DOWN COMPLETION EQUIPMENT.LAY DOWN LONG BAILS,4-1/2"ELEVATORS AND COMPENSATOR.LAY DOWN MOUSE HOLE. VISUALLY INSPECT TOP DRIVE SAVER SUB, INSTALL SHORT BAILS. 03:30 - 04:00 0.50 RUNCOM P RUNCMP SHEAR DCK VALVE IN GLM#5 AT 5,452' -PRESSURE UP TUBING TO 1,500-PSI -PRESSURE UP ON IA TO 3,500-PSI -BLEED TUBING PRESSURE TO SHEAR -VERIFY DCK SHEARED,CIRCULATE BOTH WAYS AT 80-GPM,480-PSI 04:00 - 06:00 2.00 RUNCOM P RUNCMP INSTALL TWC,TEST FROM ABOVE 250-PSI LOW 5-CHARTED MINUTES,3,500-PSI 5-CHARTED MINUTES.TEST GOOD.TEST FROM BELOW 250-PSI LOW 5-CHARTED MINUTES,3,500-PSI 30-CHARTED MINUTES. TEST GOOD. 06:00 - 07:30 1.50 BOPSUR P RUNCMP BLEED AND VERIFY ALL PRESURE IS ZERO. -BLOW DOWN LINES -SUCK OUT BOP STACK TO PREPARE FOR VISUAL RAM INSPECTION AND NIPPLE DOWN OF BOPE. *DOWNHOLE BARRIERS* IA-TESTED PACKER,TESTED ANNULUS VALVES AND TESTED CASING TBG-TESTED CASING,TBG HGR AND TWC Printed 4/9/2012 10:31:22AM North America -ALASKA- BP Page 5 of 6 Operation Summary Report Common Well Name:Z-40 AFE No Event Type:COM-ONSHORE(CON) Start Date:3/13/2012 End Date: 3/30/2012 X3-00Y53-C: (3,015,895.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 07:30 - 13:30 6.00 BOPSUR P RUNCMP PJSM, HAZARD ASSESSMENT ON BOP RAM INSPECTION. -OPEN ALL RAM DOORS. -VISUALLY VERIFY WITH WSL RAMS AND RUBBER ELEMENTS ARE IN ACCEPTABLE CONDITION FOR UPCOMING WELL Z-50 -UPPER RAMS GOOD CONDITION,LOWER RAMS GOOD CONDITION -BLIND/SHEAR RAM RUBBERS QUESTIONABLE. REMOVE AS PREVENTIVE MEASURE. -REMOVE ACCUMULATOR LINES FROM BOPE STACK 13:30 - 17:00 3.50 BOPSUR P RUNCMP NIPPLE DOWN BOPE -CLEAN DRIP PAN, REMOVE ENVIROMENTAL WRAP AND FLOW LINE COVERS. -OUT OF CRITICAL PATH CLEAN PITS AND SPOT RIG MATS FOR WELL Z-50. 17:00 - 19:00 2.00 BOPSUR P RUNCMP CONTINUE WITH NIPPLE DOWN BOPE -REMOVE HOLE FILL LINE, BLEED OFF LINE, RISER,CHOKE LINE AND TURN-BUCKLES. -RACK STACK ONTO BOP STUMP AND SECURE FOR RIG MOVE. 19:00 - 00:00 5.00 WHSUR P RUNCMP NIPPLE UP DRY HOLE TREE AND ADAPTER FLANGE. -SCHLUMBERGER COMPLETIONS FINALIZE TERMINATION OF I-WIRE -TEST ADAPTER FLANGE VOID 250-PSI LOW 5-MINUTES,5,000-PSI HIGH 30-MINUTES TESTS ARE GOOD. -RIG DOWN LINES AND HOSES FOR SKIDDING RIG FLOOR. *OUT OF CRITICAL PATH* -WORK ON NEW ACCUMULATOR SUPPLY LINES TO BOP. -REVIEW CHECKLIST FOR SKIDDING RIG FLOOR 3/30/2012 00:00 - 00:30 0.50 WHSUR P RUNCMP PJSM AND HAZARD ASSESSMENT ON TESTING THE TREE 00:30 - 01:00 0.50 WHSUR P RUNCMP TEST TREE 250-PSI LOW 5-MINUTES CHARTED,5,000-PSI HIGH 5-MINUTES.TESTS GOOD 01:00 - 01:30 0.50 WHSUR P RUNCMP RIG DOWN TEST FLANGE AND TEST EQUIPMENT. 01:30 - 03:00 1.50 WHSUR P RUNCMP PJSM AND HAZARD ASSESSMENT FOR INSTALLING AND TESTING LUBRICATOR -INSTALL LUBRICATOR AND TEST TO 250-PSI LOW 5-MINUTES CHARTED,3,500-PSI 5-MINUTES CHARTED.TESTS GOOD. 03:00 - 04:00 1.00 WHSUR P RUNCMP VERIFY PRESSURE ZERO.PULL TWC AND RIG DOWN LUBRICATOR -RIG UP CELLAR FOR PUMPING FREEZE PROTECT. *MECHANICAL BARRIERS TESTED CASING AND TESTED LUBRICATOR* Printed 4/9/2012 10:31:22AM North America -ALASKA- BP Page 6 of 6 Operation Summary Report g Common Well Name:Z-40 AFE No Event Type: COM-ONSHORE(CON) Start Date: 3/13/2012 End Date: 3/30/2012 X3-00Y53-C: (3,015,895.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 14 Spud Date/Time: Rig Release: Rig Contractor:DOYON DRILLING INC. UWI: Active Datum:Z-40 plan current @90.30ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 04:00 - 06:30 2.50 WHSUR P RUNCMP PJSM AND HAZARD ASSESSMENT ON FREEZE PROTECT -LRHO PRESSURE TEST LINES 250-PSI LOW, 3,000-PSI HIGH TEST GOOD. -PUMP 75-BBL HEATED DIESEL TO FREEZE PROTECT TO TUBING AND ANNULUS TO 2,000-FT TVD -PUMP AT 2-BPM FINAL CIRCULATING PRESSURE 1,270-PSI. *MECHANICAL BARRIERS* IA-TESTED PACKER,TESTED ANNULUS VALVES AND TESTED CASING TBG-TESTED CASING,TESTED DRY HOLE TREE. 06:30 - 07:30 1.00 WHSUR P RUNCMP LINE UP AND ALLOW DIESEL TO U-TUBE. 07:30 - 11:30 4.00 WHSUR P RUNCMP RIG UP DSM LUBRICATOR, INSTALL BPV -TEST BPV FROM BELOW WITH LRHO 250-PSI LOW 5-MINUTE LOW,3,500-PSI HIGH FOR 30-MINUTES.TEST GOOD 11:30 - 12:30 1.00 WHSUR P RUNCMP RIG DOWN LUBRICATOR AND TEST EQUIPMENT -SECURE WELL FOR RIG RELEASE TO Z-50 '*MECHANICAL BARRIERS* IA-TESTED PACKER,TESTED ANNULUS VALVES AND TESTED CASING TBG-TESTED CASING,TESTED DRY HOLE TREE,TESTED BPV '12:30 - 14:00 1.50 WHSUR P • RUNCMP PJSM-HAZARD ASSESSMENT, PREPARE RIG FLOOR FOR SKID INTO RIG MOVE POSITION. -SPILL DRILL HELD: CRT=65-SEC *RIG RELEASED FROM Z-40 FOR RIG MOVE TO Z-50* TBG PRESSURE-0,OA PRESSURE-0,IA PRESSURE-0 Printed 4/9/2012 10:31:22AM sN coMM 2• MbmOOrNWW2%222 ,VM JP07MMN EW I�ONN2 %MNN °"42," V ANO T Npm OIMMMMOOMMM sagas sagas OOOOG OO00 ONR v OO00000OOpOC W&ppT OOm0O ..... 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NOgVV WWg«N mg.0G0 O0 2 LL WWWWWW m22002 22202 2222 288 r 3 MM N 8 E 0 f{pp♦♦..pp p p p p W N2AS 4 W �NO F.O Q.S T 2J.N1 C 0 ES 8822 S FeD Z W ♦O yy W N O E Z Omamm ONOLNDgSS 022 W 0Ni z7;;7,-; "2 0 gN♦NS zH S m W 01-m J C"N OONN.rO M.I WN. MN mm�rm A«� E'�OOCOO OOi CO'f mOm rIWL W h{p N.Oi .n�m.7m Nr.p NN MN O 2—Yow428 2 W W W W mr I�r222 ..Y YY 4:1:1 i. Q ri acNi mscogNam p NN W W W LL 0 O W N W N _1,,-; X�7 Y M N A N O N a0 0 a .(.,..7 N A 0$0 ,,_ P1 AM2.4 211,;8 m.O.�AA V22 7m W C O 8 'p o E 1 ec u w E 22 0 Page 1 of 3 y Schwartz, Guy L (DOA) From: Schwartz, Guy L (DOA) Sent: Monday, March 12, 2012 12:04 PM To: 'Warren, Abigail M' Subject: RE: Z-40 P 211-173 8 Abby, Thank you for the synopsis. Please look at Z-113 also to see if there are any lessons learned that can be gleaned. Guy Schwartz Senior Petroleum Engineer AOGCC 793-1226 (office) 444-3433 (cell) From: Warren, Abigail M [mailto:Abigail.Warren@bp.com] Sent: Monday, March 12, 2012 11:28 AM To: Schwartz, Guy L (DOA) Cc: Honas, Kristopher Subject: RE: Z-40 PTD 211-173 Guy, Here is a summary of our operations involving the surface cement operation on Z-40. 03-03-12—Run 9-5/8"casing with tamport collar located at 500' MD. 03-04-12/03-05-12—The 1st cement job was pumped. This cement job consisted of 481.2 bbls of 11.2 Deeperete Lead cement and 73.2 bbls of 15.8 Class G cement(cement volumes based on 300% excess through the base of the perm and 40%excess below the permafrost). We had full returns throughout this entire job. But no cement was seen back to surface. This is point that you and I talked last weekend and we made the decision to open the tamport and pump a second job. We opened the tamport collar and saw cement returned to surface after 10 bbls into displacement, we continued to circulate cleaning up behind that tamport. We then pumped the 2nd cement job through the tamport, good cement was seen after 168 bbls pumped of 11.2 Deeperete, 194 bbls total was pumped with full returns throughout the cement job. After the cement job, the wellhead was nippled up along with BOP's 3-6-12—Pressure test 9-5/8"casing, pressure increased to 1450 psi and began bleeding off. RIH with the tamport collar shifting tool and cycle open and closed trying to get it to shut. We could circulate at 4 bpm with returns coming up the OA. Continue cycling the tamport collar open and closed trying to get it to hold pressure, eventually it held 2000 psi, POOH with port collar tool. Pressure test casing to 3500 psi and it held. 3-7-12—RIH with shifting tool and latch into tamport, establish circulation and pump 3rd cement job through the tamport. A total of 117 bbls of AS1 cement was pumped (15.7 ppg, 0.93 ft3/sx), 36 bbls of cement to surface. We then closed the tamport and picked up drill pipe. The 9-5/8 casing was pressure test to 3500 psi and was a good test. We had issues getting the casing down originally and had to go in with a cleanout run, looking back on it now, I believe that we may have had a bit more washout below the base of the permafrost due to all the extra circulating which was done during the cleanout run before running the casing the second time. At the time we thought we were in good shape in regards to washout, hindsight, it would have been good to pump more cement. Also, when the tamport was leaking, the cement was most likely still green on the backside. Please let me know if you have any other questions 3/12/2012 Page 2 of 3 4111/ S Abby Original Message From: Schwartz, Guy L (DOA) [mailto:guy.schwartz@alaska.gov] Sent: Thursday, March 08, 2012 10:50 AM To: Warren, Abigail M Subject: RE: Z-40 PTD 211-173 Abby, Can you send me a quick paragraph summarizing the surface cement operation on Z-40. I need to put something in our file. I assume the last sqz went ok. Is there anything that could have been done differently?? Die in the mudpush to help calc hole volume?? The cement report states returns throughout job but not if there were full returns. Thanks, Guy Schwartz Senior Petroleum Engineer ADC, C 793-1226 (office) 444-3433 (cell) Original Message From: Warren, Abigail M [mailto:Abigail.Warren@bp.com] Sent: Sunday, March 04, 2012 6:59 PM To: Schwartz, Guy L (DOA) Cc: AK, D&C Rig 14 Well Site Leader; Allen, Kenneth W; Schultz, Mikel Subject: Re: Z-40 PTD 211-173 Guy, As discussed over the phone, I talked with the WSL's and there was cement in the returns while circulating out behind the tamport collar before our cement job. Let me know if you have any questions. ThAnk.s Abby Original Message From: Schwartz, Guy L (DOA) [mailto:guy.schwartz@alaska.gov] Sent: Sunday, March 04, 2012 03:06 PM To: Warren, Abigail M Cc: AK, D&C Rig 14 Well Site Leader; Allen, Kenneth W; Schultz, Mikel Subject: Re: Z-40 PTD 211-173 Abby, Approved to open port collar at 500 ft and finish cemented surface casing. If you don't get cement in returns before last stage of cement is pumped there is likely a "gap" below port collar. The commission may request a CBL to verify cement placement before drill out. Also, please send me the full cementing summary Monday morning so I can review. Regards, 3/12_/2012 Page 3 of 3 41111 4111, Guy Sent from my iPhone On Mar 4, 2012, at 2:37 PM, "Warren, Abigail M" <Abigail.Warren@bp.com> wrntc > Guy, > As discussed on the phone, Doyon 14 pumped the surface cement lob and did not get cement to surface. We did run a Tamport collar at 500' and will be opening that to cement through. > Please let me know if you have any other questions. > Th.nk.G > Abby Warren > 240-929" 3/12_/2012 Schwartz, Guy L (DOA) From: Warren, Abigail M [Abigail.Warren@bp.com] Sent: Sunday, March 04, 2012 6:59 PM To: Schwartz, Guy L(DOA) Cc: AK, D&C Rig 14 Well Site Leader; Allen, Kenneth W; Schultz, Mikel Subject: Re:Z-40 PTD 211-173 Guy, As discussed over the phone, I talked with the WSL's and there was cement in the returns while circulating out behind the tamport collar before our cement lob. Let me know if you have any questions. Thanks Abby Original Message From: Schwartz, Guy L (DOA) [mailto:guy.schwartz@alaska.gov] Sent: Sunday, March 04, 2012 03:06 PM To: Warren, Abigail M Cc: AK, D&C Rig 14 Well Site Leader; Allen, Kenneth W; Schultz, Mikel Subject: Re: Z-40 PTD 211-173 Abby, Approved to open port collar at 500 ft and finish cemented surface casing. If you don't get cement in returns before last stage of cement is pumped there is likely a "gap" below port collar. The commission may request a CBL to verify cement placement before drill Also, please send me the full cementing summary Monday morning so I can review. Regards, Guy Sent from my iPhone On Mar 4, 2012, at 2:37 PM, "Warren, Abigail M" <Abigail.Warren@bp.com> wrote: > Guy, > As discussed on the phone, Doyon 14 pumped the surface cement job and did not get cement to surface. We did run a Tamport collar at 500' and will be opening that to cement through. > Please let me know if you have any other questions. > Thanks > Abby Warren > 24fl-9293 SIMITIE ^ ALAS - L--;\a 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-40 BP Exploration (Alaska), Inc. Permit No: 211-173 Surface Location: 4294' FSL, 2697' FEL, SEC. 19, T11N, R12E, UM Bottomhole Location: 1180' FNL, 2551' FEL, SEC. 30, 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 86 Game, Habitat Section w/o encl. (via e-mail) Department of Environmental Conservation w/o encl. (via e-mail) STATE OF ALASKA RECEIVED'" .. ALASK,. JIL AND GAS CONSERVATION COMMIS-.JN PERMIT TO DRILL DEC 2 2 2011 20 AAC 25.005 1 a.Type of work: 1b.Proposed Well Class: ®Development Oil 0 Service-Winj 0 Single ZoneAtas(acailkeelifg('yep$,I�roimiuion ® Drill 0 Redrill 0 Stratigraphic Test 0 Development Gas 0 Service-Supply 0 Multiple Zone 0 Coampr ,,❑Gas Hydrates 0 Re-Entry 0 Exploratory 0 Service-WAG 0 Service-Disp (D 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-40 3. Address: 6. Proposed Depth: 12. Field/Pool(s): P.O. Box 196612,Anchorage,Alaska 99519-6612 MD 11925' ND 9130' Prudhoe Bay/Prudhoe Bay 4a. Location of Well(Governmental Section): 7. Property Designation(Lease Number): Surface: ADL 028262&047453 4294' FSL,2697'FEL, Sec. 19,T11 N, R12E, UM Top of Productive Horizon: 8. Land Use Permit: 13. Approximate Spud Date: 1111' FSL,2572'FEL, Sec. 19,T11 N, R12E, UM February 15,2012 Total Depth: 9.Acres in Property: 14.Distance to Nearest Property: 1180' FNL,2551'FEL, Sec. 30,T11 N, R12E, UM 2560 4790' 4b. Location of Well(State Base Plane Coordinates-NAD 27): 10.KB Elevation above MSL: 90.3' feet 15.Distance to Nearest Well Open Surface: x- 599981 y-5959100 Zone- ASP4 GL Elevation above MSL: 56' feet to Same Pool: 686' 16.Deviated Wells: Kickoff Depth: 300' feet 17.Maximum Anticipated Pressures in psig(see 20 AAC 25.035) Maximum Hole Angle: 97 degrees Downhole: 3773 Surface: 2903 18. Casing Program: Specifications Top-Setting Depth-Bottom Quantity of Cement,c.f.or sacks Hole Casing Weight Grade Coupling Length MD TVD MD ND (including stage data) 42" 20" 129.5# X-65 Weld 80' Surface Surface 80' 80' 260 sx Arctic Set(Approx.) 12-1/4" 9-5/8" 40# L-80 BTC 3384' Surface Surface 3384' 3050' 1317 sx DeepCrete. 329 sx Class'G' ' 8-3/4" 7" 26# L-80 .VAMTOP 9441' Surface Surface 9441' 8612' 477 sx LiteCrete. 183 sx Class'G' " 6-1/8" 4-1/2" 12.6# 13CR85 VAMTOP 2634' 9291' 8463' 11925' 9040' Uncemented Sliding Sleeves 4 Staid( pa.c(CL✓S+ 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 MD ND Conductor/Structural Surface Intermediate Production Liner Perforation Depth MD(ft): Perforation Depth ND(ft): 20.Attachments: ® Property Plat ®BOP Sketch ®Drilling Program 0 Time vs Depth Plot 0 Shallow Hazard Analysis ®Diverter Sketch 0 Seabed Report ®Drilling Fluid Program ®20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the foregoing is true and correct. Contact Abby Warren,564-5720 Printed Name Ken Allen Title Engineering Team Leader / Prepared By Name/Number: Signature �= j G1/" Phone 564-4366 Date I2/,-,////i Terrie Hubble,564-4628 Commission Use Only Permit To Drill API Number: Permit Ap royal lite: See cover letter for Number: p2l/!�S 50-Gb?9�,34I(,a.0. '00 � ���\r1/ 1 other requirements Conditions of Approval: If box is checkedd,,well may not be used to explore for,test,or produce coalbed methane,gas hydrates,or gas contained shales: ler Other: "q' 3 500 / -S — ' /`S Samples Req'd: 0 Yes Id No Mud Log Req'd: Oyes ErNo / HA Measures: 'Yes 0 No Directional Survey Req'd: h0 Yes 0 No _ do ai^.e.„oa�� a po�e.� 44. / COO ' ltZv A4c-ZS-.o 33C�j ) 7//3// aAPPROVED BY THE COMMISSION Date �� ,COMMISSIONER Form 10-401 Revised 07/2009 This ermitis valid for 24 months '( ep RAC 20 AAC 25.005 Submit In Duplicate Well Name: Z-40 Drill and Complete Plan Summary Name Position Office Home Cell Abby Warren Drilling Engineer 5720 688-2895 240-9293 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 5,959,100 599,980 4293 FSL / 2,697 FEL 11N, 12E, 19 Target Northing Easting TVDss Offsets TRS Locations 5,955,920 600,160 -8610 1110' FSL / 2572' FEL 11N, 12E, 19 Bottom Northing Easting TVDss Offsets TRS Location 5,953,630 600,220 -9040 4099' FSL/ 2552' FEL 11N, 12E, 30 [—API NUMBER: NA Rig: Doyon 14 Estimated Start Date: 02/15/12 Operating Days to complete: 25.5 MD: 11925' TVD: 9130' RT/GL: 34.3/56.0' RTE: 90.3' Well Design: Grassroots lvishak Zone 4 Producer 4- " o:, • Cr-85, Vam Top, Solid liner/ swell packer sliding sleeve completion Objective: Zone 4 Producer Directional Plan: Version: SLB WP15b KOP: 300' MD Maximum Hole Angle: 97° in the production hole Close Approach Wells: All wells pass major risk criteria. Nearest well within Pool TD 686' from TD Z-16A Distance to Nearest Property TD 4790' SW from PBU boundary Line: Z-40 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: Cement Bond Log 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 aH (ppg) (seconds) (2x3-6 rpm) (Ib/100ft`) (mis/30min) Spud to Base 8.8—9.5 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 9.0—9.5 60-120 (for reference 20—45 40—80 Less than or 10.8 TD 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 CM1 9-9.5 12 - 18 20 -28 < 6 9 - 10 CM1 to TD 10.3-10.5 12 -25 20-28 <4 9 - 10 6-1/8" Production Hole: FloPro Depth Interval Density PV YP LSRV HTHP FL pH MBT (PIN Csg Shoe to TD 8.6-9.0 3-12 10-20 > 20,000 < 10 8.5-9.5 < 3 Casing/Tubing Program: Hole Size Csg/ WtIFt Grade Connection Length Top Btm Tbg O.D. MD/TVDss MD/TVDss 42" 20" 129.5 X-65 WLD _ 80' GL 80'/80' 12 %4" 9 °/8" 40 L-80 BTC 3384' GL 3384' /3050' Z-40 Permit Application Page 2 8 3/" 7" 26 L-80 VAMTOP 9,441' GL 9441' /8612' 6 1/8" 4 '/2" 12.6 13Cr-85 VAM TOP 2634' 9,291'/8,463' 11,925'!9040' Tubing 4 1/2" 12.6 13Cr-85 VAM TOP 9291' GL 9,291' /8,463' Formation Integrity Testing: 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 /g" Basis: Lead: Open hole volume +250% excess in permafrost and 40% excess below permafrost. Port collar used if necessary. Lead TOC: Surface Tail: Open hole volume +40% excess below permafrost+ 80' shoe track. Tail TOC: -800' MD above the casing shoe Total Cement Volume: Lead 439bb1 /2463 ft3/ 1317 sks of DeepCRETE at 11 ppg and 1.87 cf/sk Tail 69 bbl/385 ft3/329 sks of Class 'G' at 15.8 ppg and 1.17 cf/sk Intermediate Casing: Casing Size 7" Basis: Lead: Open hole volume 30% excess Lead TOC: -600' MD below the surface casing shoe Tail: Open hole volume 30% excess + 80' shoe track. Tail TOC: 1000' MD above the casing shoe Total Cement Volume: Lead 156 bbl/877 ft3/477sks of LiteCRETE at 11 ppg and 1.84 cf/sk Tail 38 bbl/213 ft3/ 183sks of Class 'G' at 15.8 ppg and 1.16 cf/sk Z-40 Permit Application Page 3 Formation Markers: (8) Formation Top and Estimated Pore Pressure Predictions NOTE:All standard formation tops are redL'lr d from GR tie-In point above proposed KOR to TD for sidetracks IIINOTE All standard formation t'bps are moulted from surface to TD for all new wells NOTE: Formation tops and pressures are required for all fault blocks penetrated and al*rt9 laterals for nortzontal and nion-angle wells Tops eased on well Plans: Z-40 wp1S Estimated Depth Hydrocarbon Estimated Pore Pressure Formation Fontlatlon Top uncertainty Bearing Pore Pressure uncertaalty :TVDss; (+/-TVD it) r yes leo ;EMW ppg;. r EJAW+,-ppg: G1 -255 +1-40' NO 8.3s,8.4, +1-C.2 SV6 -1025 +1-40' No 8.35,8.40.8.4.5 +.1-0.2 EOCU -1595 +1-47' No 8.35,8.40,8.45 +:-C 2 SVS -1680 +/-4:Y No 8.35,8.40,8.45 +1-0.2 BPRF -1780 +1-40' No 8.35,8.70.8.90 +1-0.2 -.Orates below SV4 -1805 4-40' BPRF 6.35,8.70,5.90 +1-0.2 SV3 -2285 +.-40' Hydrates &.35,8.70,8.90 +/-0.2 SV2 -2460 +1-40' Hydrates 8.35,8.70,8.90 4-0.2 SV1 -2775 44-40' Hydrates 8.35,8.70,8.90 4-0.2 9 58"Surface Casing -3050 +1-0.2 UG4 -3085 4-40' No 8.35,8.70,9.30 4-0.2 UG4A -3'60 +4-40' No 8.35,8.70,8.80 +7-0.2 UG3 -3415 +1-40' NO 8.36,8.70,8.80 +7-0.2 UG1 -3925 4-40' No 8.35.8.70,8.80 ++-0.2 i Faultlrf(Highland State Fault) -39/.0 100'M.D. Sae Fault Section below for details UG Ma -4000 +1-40' Heaayoii 8.35.870,8.80_ +1-0.2 UG_Mb1 -4046 +1-40' Heavy'oil 8.35,8.70,8.80 4-0.2 UG_Mb2 -4105 +1-40' Heavy ot,, 8.35.8.70,8.80 +1-0.2 UG_Mc -4160 - -40' Hoary oiv 8.35.8.70,8.80 4-0.2 SB Na -4225 +/-25' Yes 8.45,8.70,8.70 4-0.2 SB Nb -425.0 +1-25' Yes 8.45,8.70,8.70 4-0.2 SB_OA -4410 +1-25' Yes 8.45,810,8.70 4--0.2 SB OBa -4465 +1-25' Yes 8.45,8.70,870 +1-0.2 SB_OBb -4500 +1-25' Yes 8.45,8.70.8.70 +1-0.2 SB_OBc -4550 +1-25' Yes 8.46,8.70,870 4-0.2 SB_OBd -4605 +1-25' Yes 8.45.810,810 4-0.2 SB OBe -4665 +1-25' Yes 8.45,8.70,8.70_ +1-0.2 SB_OBt -4705 +r-25' Yes 8.45.810,8.10_ +1-0.2 SB_OBf_Base -4755 +1-25' No 8.45,870,8.70 +4-0.2 CM-2 -5380 +4-40' Yes,GCM 8.45,8.70,8.70 ++-0.5 Top Overpressure 5780 +/-60' 9.0(.7.10.00,10.00 CM-1 -5820 +1-40' Yes,GCM 9.40.10.04,1020 +/-C.2 TLBK -6145 +1-40' Yes,GCM 9.40.10.00,10.70 +-0.2 THRZ -6290 +1-40' Yes.GCM 9.40.10.00,10.30 4-0.2 TKLB -6580 +1-40' Yes,GCM 9.40.10.00,10.30 4-0.2 TKUP -6600 +1-40' Yes oivgas 6 40.9.50,10.40 +I-0.2 TKC4 -6600 +f-40' Yes oivgas 6-40.9.50,10.40 -4-0.2 TKB/LCU -6650 +1-40' Yes oit"gas 8.45,10.00,10.00 +1-0.2 TKAS -6645 +1-40' Yes eiL:gas 8.45.10.00,10.00 4-0.2 Fault#2 -6700 4- 150'M.D. See Fault Section below for details TMLV -6700 +1-40' No 9.670.10.00.10.30_ 4-02 TKNG -7330 +/-40' No 9.60.10.00,10.50 +7-0.2 TJG -7360 +1-40' No 9.60.10.00,10.50 4-0.2 TJF -7670 +1-40' Yes,GCM 9.60,10.00,10.50 4-0.2 Fault#3(8,600 MD) -7890 ++- 150'M.D. See Paul:Sector below for details TJE -7890 +1-40' No 9.60.10.00,10.50 4-0.2 TJD -8140 +1-40' Yes,GCM 9.60,10,00,18.50 4-0.2 TJC -8350 +1-40' No 9.60.10.00.10.50 4-0.2 TJB -8463 +1-40' No 9.60.10.00,10.50 4-0.2 TJA -8522 +1-40' No 9.60.10.00,10.50 +1-0.2 Z-40 Permit Application Page 4 TSGR 8612 4-20 Yes gas 7.14,8.34,8.6 4-0.2 TSHA 8638 +1-20 Yes gas 7.12,9.2.9.7 +J-0.2 TEIL 8741 +1-20 Yes gas 7.12,8.24,6.7 +/-0.2 PGOC -8770 TSAD(46P) -8780 +1-20 Yes ciVgas 7.05,8.1,8.53 4-0.2 45N -8808 +1-20 Yes oiVgas 7.05,8_1.8.53 4-0.2 45P -8815 +1-20 Yes oiLrgas 7.05,81.8.53 4-0.2 44N -8830 +1-20 Yes oiVgas 7.05,8.1,8.53 +1-0.2 44P -8835 +1-20 Yes oiVgas 7.05,8.1.8.53 4-0.2 43N -8860 +f-20 Yes oitrgas 7.05,8.1.8.53 +/-0.2 43P -8865 +1-20 Yes oiVgas 7.05,8.1.8.53 4-0.2 42N -8883 +1-20 Yes oiVgas 7.05,8.1.8.53 +1-0.2 42P -8887 +1-20 'r'as :,lgas 7.05,8.1.8.53 +1-0.2 POWC -8910 Fault#4(10.320 MD) -8915 4- 100'M.D. Sae Fault Section below for details Invert 42P -8908 +1-20 Yes oil'gas 7.05.8.1.8.53 +1-0.2 42N -5904 4-20 Yes oiVgas 7.05,8.1.8.53 +1-0.2 43P -6886 4-20 Yes oiVgas 7.05,8.1.8.53 +1-0.2 43N -688.3 +,1- 20 Yes oiL'gas 7.05.8.1.8.53 +1-0.2 Fault 06(10,880 MD) -6860 +1- 100'M.D. See Fault Section below for detais 44P -6855 +1-20 Yes oiVgas 7.05,8.1.8.53 +1-0.2 44N -6852 +1-20 Yes cilrgas 7.05,8-1.8.53 +/-0.2 45P -58-0 +1-20 Yes cil'gas 7.05,8.1.8.53 +i-0.2 45N -8832 4-20 Yes oilgas 7.05,8.1.8.53 +1-0.2 44N -6817 +1-20 Yes ciLgas 7.05,8.1.8.53 +a-0.2 45P -8607 +J-20 Yes cilgas 7.05,8.1.8.53 +1-0.2 Fault#6(11.250 MD) -8820 +1- 100'M.D. Sae Fault Section below for details Build 2 45N -6823 Yes oiLgas 7.05,8.1.8.53 +1-0.2 45P -6832 +1'- 20 Yes oiVgas _ 7.05.8.1.8.53 +1-0.2 44N -5848 4-20 Yes oiVgas 7.05,8.1.8.53 4-0.2 44P -8848 4-20 Yes oiVgas 7.05,8.1.8.53 +1-0.2 1 43N 43P 8879 +r 20 Yes oiVgas 7.05.8.1 6.53 +1-0.2 88 .3 +; 20 Yesolrgas 7.05,8.1.8.G3 +'-0.2 42N -69C' 4-20 Yes oilrgas 7.05,8-1.8.53 4-0.2 42P -6906 +1-20 Yes oiVgas 7.05,8.1.8.53 4-0.2 POWC -8910 +1- 10 7.05,8.1.8.53 4-0.2 41 N -8944 4-20 Possible oil 7.05.8.1.8.53 4-0.2 41 P -8957 +1-20 F 0 ssiit 4e oil 7.05,8.1.8.53 4-0.2 31 N -8988 4-20 'r es oiVgas 7.05,8.1.8.53 +1-0.2 TD -9040 7.05,8.1.8.53 PFG approved Siok.&242011. Z-40 Permit Application Page 5 Well Control: 12 '/4" hole will be drilled with diverter. The 8 3/" 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 handling maximum potential surface pressures. Annular preventer and the rams will be tested to 3500 psi. The BOP test frequency will be conducted on a 14 day frequency,with a function test 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: 3773 psi @ 8700' TVD, 8.34 ppg EMW • Maximum surface pressure: 2903 psi (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: Corrosion Inhibited brine / Diesel 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 10.3 10 LOT Casing 13.8 LOT) • 7" Intermediate 3500 psi Infinite (assuming 8.7 8.3 FIT Liner 9.5 FIT) 61/8" Liner Top 3500 psi NA NA NA NA Packer 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'). 14))/e. 3 36, Zo Z-40 Permit Application Page 6 Z-40 - Drill and Complete Procedure Summary Pre-Rig Operations: 1. Install 20" conductor casing. 2. Weld a FMC landing ring to the FMC Gen 5 wellhead, on the conductor. 3. If necessary, level the pad and prepare location for rig move. Rig Operations: • 1. MI/RU Nabors Doyon 14. 2. Nipple up the diverter spool and riser. P/U sufficient length of 4" drill pipe to TD the surface hole and stand back in the derrick. F'Nws -'zsf• 3. M/U a 12-W drilling assembly with MWD/GR/RES. Spud and directionally drill surface hole to TD. Gyro will be used for surveying the portion of the surface hole with magnetic interference. If needed, perform wiper trip at the base of permafrost and POOH for a new bit. 4. Drill the remainder of the surface hole to the planned surface hole TD in a shale above the UG4. Circulate and condition hole. Wiper trip to base of permafrost. POOH and L/D BHA. 5. Run and cement the 9-%", 40#casing back to surface. A TAM port collar may be run as a contingency if hole conditions indicate a problematic primary cement job. 6. N/D diverter and the riser spool and N/U the FMC casing head and tubing spool. Test as necessary. '7. N/U the BOPE and test to 3,500 psi. 8. MU 83/" drilling assembly with Dir/GR/Res/Den/Neu and RIH. Pick up 4" drill pipe as necessary. 9. Test 9-5/8" casing to 3500psi. Drill out cement, float equipment, and the shoe. Displace the well to LSND drilling fluid. • 10. Drill approximately 20' new formation and perform the planned LOT. - 13.8 f rulAi 11. Drill ahead, according to directional proposal, to -V100' above the CM2. 12. Increase mud weight, via spike fluid, to -V10.3 ppg per the Kingak/HRZ polar plot. 13. Drill according to directional plan to intermediate TD approximately 10' MD beloof the Sa . Circulate bottoms up as necessary for sample collection to properly identify shale/siltstone cap. 14. Condition hole as necessary and POOH. Rack back 4" DP. 15. Change out VBRs to 7" casing rams and test to 3500 psi • 014- 16. K16. Run and cement the 7", 26# intermediate casing. (Note: Original plan is to set casing with a mandrel hanger) Test Casing at plug bump to 3,500 psi. Install casing pack-off and test per FMC representative. 17. Change 7" casing rams to VBRs and test to 3500 psi • roc- 18. Freeze-protect the 9-%" x 7" annulus, once the cement has reached 500 psi compressive strength. GOp 6�•�- 19. M/U a 6-W Build assembly with Dir/GR/Res/Az-Den/Neu. RIH, P/U additional 4" drill pipe as required. sh o` 20. Drill out half the shoe track, swap to Flo Pro, drill the rest of the shoe and 20' of new formation and perform an FIT `3�.S pa- EMa/ 21. Drill ahead, per directional proposal until a bit trip is necessary, POOH for lateral BHA 22. RIH with lateral drilling assembly with Dir/GR/Res/Az-Den/Neu, drill ahead per directional proposal and rig site geologist, to well TD. 23. Condition the hole as required and spot clean liner running pill on bottom. POOH, L/D excess 4" drill pipe, and L/D BHA. 24. R/U and run the 4 W, 12.6#, 13Cr, VamTop solid/swell packer/sliding sleeve liner. CBU at 7" shoe and TD as necessary. 25. Set liner top packer and displace well to clean seawater above the liner top 26. POOH L/D drill pipe, L/D and inspect liner running tools. 27. RU E-line and run GR/JB, then USIT from PBTD to surface • 28. R/U and pressure test the casing x liner string to 3,500 psi for 30 minutes. Record the test. Notify the state of pressure test 24 hours in advance of test. (Note: Test after 500psi compressive strength has been achieved.) 29. R/U and run a 4-W, 12.6#, 13Cr, VamTop completion (with a pressure guage). Space and land the tubing with the tubing tail inserted into the liner tie back sleeve. RILDS. 30. Reverse circulate filtered seawater, corrosion inhibitor and diesel freeze protect into the tubing x casing annulus. Z-40 Permit Application Page 7 31. Drop ball/rod and set packer. 32. Individually test the tubing and annulus to 3,500 psi for 30 minutes. Record each test. 33. Install TWC and test. 34. N/D the BOPE. 35. N/U the adapter flange and tree. Test tree and adapter to 5,000 psi. 36. RU DSM. Pull TWC. 37. Install a BPV, then the VR plugs in the annulus valves. 38. Secure, rig down and move off. Post-Rig Operations: 1. MI / RU slick line. Pull the BPV. Pull the ball and rod / RHC plug. Pull shear valve and dummies, install GLV design 2. MIRU CTU and set CIBP in anchor 3. Open sliding sleeves (several stages). Flow back and clean up after each shift 4. Close sleeves for initial arrangement of production Z-40 Permit Application Page 8 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 mid-CM-2 II. Hydrates: 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. III. Faults/ Lost circulation A. Fault#1, #4, #5, and #6 have the highest chance of lost circulation. Follow LC decision tree if losses are encountered. Formation Where Encounter Fault MD Intersect r:Gss insr ect Est.Throw Throw Direction Uncertainty Fault#1 Hiphland State FaLA-Ugn:.M Sancs -3,930 -260'to-3C(' .$cuthwesi +,'-1C": td D Fault#2-Miluueach 7.191 -6,700 20 to 30' North +.- 1 _ M D Fault#3-Kinga.c 6.600 -7,890 -10'to- None M.D Fault#4-tuishakZone 4 1! E,91c -10'10 t2*` ==,_h +r-100 MD Fault#5-tuishakiore 4 10 56:3 E.,860 -40'to = Non- - 1';-. IA L' Fault#6. taishak 20 ne 4 11 25.3 5,820 +t C tc 1-25 S ih *., 1: M 0 B. Shublik losses and breathing are possible. Follow Shublik mitigation plan IV. 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 800' below the 9 5/8" casing shoe. The 6-1/8" liner will not be cemented as this is a swell packer/sliding sleeve completion I 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. 10.3 10.0 LOT Casing _ 13.8 LOT) ✓ 7" Intermediate 3500 psi Infinite (assuming 8.7 8.3 FIT Liner 9.8 FIT) V • 61/8"" Production 3500 psi NA NA NA NA Casing V. Heavy Oil A. Heavy oil is expected in the UG4A through UG_Mc intervals which could result in plugging of shaker screens. Follow established operating practices for drilling in heavy oil zones. VI. Broaching A. Monitor adjacent wells for broaching while drilling surface hole. VII. Hydrogen Sulfide Z-40 Permit Application Page 9 A. All Z Padgas lift wells are expected to have H S levels in the 20 to 120ppm range; result of P 2 9 PBU gas lift gas. This site should be treated as an H2S site with all the required precautions. Date of Well Name H2S Level Reading #1 Closest SHL Well H2S Level Z-20 30 7/2/2010 #2 Closest SHL Well H2S Level Z-17 20 4/28/2009 #1 Closest BHL Well H2S Level Z-16A 24 8/9/2009 #2 Closest BHL Well H2S Level Z-11A 40 7/3/2010 Max. Recorded H2S on Pad/Facility Z-100 120 3/2/2010 Other Relevant H2S Data: H2S levels of 0-120ppm have been recorded at Z Pad (H2S alarms from rigs, etc.) CONSULT THE Z PAD DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION Z-40 Permit Application Page 10 TREE= WELLHEAD= FMC ��O SAl ,VOTES: ACTUATOR= KB.ELEV= Proposed BF.ELEV= - I KOP= Max Angle= 2200' H4-1/2"HES X NIP ID=3.813"-19-5/8"TAM PORT COLLAR Datum MD= / ..... Datum TVD= 20",215.5#,A-53 INSULATED CONDUCTOR --f 80' GAS LIFTMANDRELS 9-5/8"CSG,40#,L-80 BTC,ID=8.835" - 3383' ST MD TVD DEV TY PE VLV LATCH PORT L 5 4 3 2 1 Minimum ID = 3.725" @ 4-1/2" HES XN NIPPLE ---' I 3955' —Proposed TOC f 9120' H4-1/2"HES X NIP,ID=3.813" L 9150' —Sapphire Perm Pressure Gauge ZII R` 9180' -17"X 4-1/2"HES TNT PKR, ID=3.856 I I 9210' H4-1/2"HES X NIP,ID=3.813" it (.'?".I. I I 9280' 1-14-1/2"HES X NIP,ID=3.813" g I S L�- S C ----I 9291' -I BKR HNG/LTP 4-1/2"TBG, 12.6#, O-fC1r,--{ 9292' / \ — .0152 bpf, ID=3.958" \ /� 9294' f-4-1/2"WLEG, ID=3.958" 7"CSG,26#,L-80 VT HC,ID=6.276" — 9441' --,A L Easy Sw ell Sw ell Packers Sliding Sleeves ID 3.813 No Size Type MD Length Date No Size Depth Open/Close Date El I 7 rl 18 Sw ell Packers proposed at this time 10 Sliding Sleeves proposed at this time I I I Placement w ill be determined before Placement w ill be determined before ® Fl completion completion .�.�.../ 4-1/2"LNR,12.6#,L-80 IBT-M,ID=3.958" — 11925' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 10/29/10 JCL Proposed Completion WELL: Z-40 PERMIT No: API No: BP Exploration(Alaska) el r0) a)(0 0^ 66000 ON.COON MMV Of0o0MF2N0OO 22QNO 2O400 (0 pp/ p 0c,icsi a_ 1 0O0W O.mpp0 W 0mpW 000 p0M828 20°42 188O2 20028 880D0C0008088O08008 2.23;2 8888 28i 8 28i a ..... 00000 ..... 00000 ..... 00000 ..... c0 0 pp (p (pp N pa -,;-.8s2 7n07 r 0q�r(0 (MO.(MO,�N� 00000(0 ONNNM RCD N 001800 0000)0 oo000 00000 000 0 . 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F 000)00)0 77 6666 000On N 000000 0D00D0 p2p0 OO)ON)ON00000 p0'W 00000) OSggO 000,00 0 000001 OM)W O S 0 00 00 00000 000000 00000 000000 000 M M 0)0) O) 00 00000 00000000 W 0 t M O L p p p p p 0p a H C 0000 OSS�O ON 8<'?8 OSOOS 080"S 006!088 000(00,0 ?f�NmO ST Nf7�,17�, O a O 6686 N 00^ ^�0p00i 0tCf2 000006) 00000 0(5n pppONppp�oj f� 0^0600 ,0000000000 00R0O V 01 O N 0000000 0000 W m m OD U0`^)0 00000000000 0000000000 000000000 m 000 m W W 0000 OMp 000 O0D 006 006 000 006 W 2 0 W = ;2222 2 2 2 x00 0r- 666R mmmopmmOM0 -N70 -NNN WMM20MW8 nn^00pN<0W W www'4 [ 000D) CON ,c0ODD 00 ) 0 Z f M6NM MMMMM 66766 MMMMNNMNMM MMMMM MNMn 03p 'M gggy 0 0000 0000n n00nn 00nn0 00nn0 P.C.0nnn000000 0O00 RK2 E -p)22Z MHHH LL J J J a M C N W W W 3 _ 8888 88888 88aWOa O2 N�M0Q0 2'4222 20208 NNNNN 8,98MO a IOLLN0000 00d00 004NR 00p0o0N)0- nSWm000n00n(p07tNNNN NNNNN NNNM7 , 0000 000 0 00000TO)00O0U JNNN m0-WW W CO 0.LL LL 0NM O 0p0 ppp0pp p p p p 0 3 O A O 2,2.-C ^l 2 n v.0 N N o 0 0 m 88 V 0--0000 0,0,-.0m N 0 0 0 0 O p p pp Y O O S O 0 f'1 < S N= MN--0 O)o0,O)r OOoi N\OU) 060)0000 OV 00ry.� O'j0MS0 0000000)0 00000 0 14z�m OUM4)U)a^) 00Q) 0 a O00 Oo o 0o 0,0,0,00, .0... 000 8 S�^�- .Si.'. - 0 �,a 0 r r N 0 O 00 O OV Fa' p 200) ” N 8 ti- 8 N S M V 7 ` . M .Qs� �a¢ ono z `0, o c,y�� o 0 u.-S."-WO 0 7-, 7 0 7 T O U Z W y �S Z7 O 0`0) 0)) C Q N Z ? C N RO 7 9 0 C 0 -OIC--ti hhl-N n LUN- 1- 0L 7 777 7 7 .544 )lWU N W Nl uTo N w F Q • by Schlumberger 0 WELL FIELD STRUCTURE Plan Z-40 (P15b) Prudhoe Bay Unit-WOA Z-PAD Magnet.Parameters Surface Locaeon NA027 Alaska State Plane,Zme O4,US Feet Miscellaneous Model. EGGS.2011 Dm. 80.989• Data. Febuary20.2012 Lat N 701751.618 NOMing: 5959100.17615 God Cary:07822884,7 Slot 1-00(SI) ND Ref: Rota or Ta8e(90311 above MSLI Mag Dec: 20.915° FS 57847,OnT Lon: W 149 11 25 221 Eastng: 599990948US Scale Fad:0.99991138 PRP Z-10(P150) Srry Date:August 19 2011 0 1200 2400 3600 4800 0 0 RTE INOPBid 1/100=...;j_.._.._.._.._.._.._.._..-.._.._.._.._.._.._.._.._.. .._.._.._.._.._.._.._.._.. .._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._. Bid 2/100 Bid 2.5/100 1200 1200 ■::*su:s:a.,. as:■esitn■nanau■uasuuas:n imm:an■n■nau■::suanimssunmsauau■uanaston■n■ts•ssmu■a■s End Bid Cry 3.51100 2400 ::•°y°:•°-::-:•°.:.?051.::. _..y.._.._..,...:•.,.•:.,::.,::r: ::::::::.:•.r•:.,::.r•:.,..�.}.._..,.._..,..,.._.._.._.r.._.._.._.._..t.._..,. 2400 -..l..._.._.._..—..—.._.. . E ....._.._.._.._.._..*.._.._.._.._.._.._.._.._..r.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._. :::a::=::=:BSA:t a_°°_. .}.._.._.._.._.._.._.._.._.. .._.._.._.._.._.._.._.._.. .._.._.._.._.._.._.._.._.<_.._.._.._.._.._.._.._. 3600 ---'••_.._.._.._.._.._.°_. 10a.._.._.._.._.._.._.._.._..r.._.._.._.._.._.._.._.._.g.._.._.._.._.._.._.._.._.r.._.._.._.._.._.._.._. 3600 CN s:el:esees:euZariwl5. i.•:r.:asuuauan■sxnssuYssae:aseanounuuuasstns:ass:annsannsassasfsaa:esssaaauassassas • 4800 3J b�.._.._ .8' .._.._.._.._ 4800 m •:Base U 0 I— 6000 1 6000 Dry 3.5/100 ■..r.........f...............e•.............:..f Faun 2 Cry 4/100 End Cry 7200 •••• surely 7200 Fault 3 8400 _..r.._.._.._.._.._.._.._.._..*.._.._.._.._.._.._.._.._ r.._.._.._.._. .._.._.`.._.._.._.._.._.._.._.._.�t .T3.._.._.._.._. 8400 suassuastaus»suaaas:auis:ass:ananasas::a: Ts:a::a::a::r.:r.:3::S::.....-...,:s:ss::a:: u �fi�sCry •i-i• ••_•• •• •• ii ii ii ii iiiiiiii ii-i• ii_ _ -.�iiiiiiiiiiiiiiii:�••�•_�ii ii 0;_ II Cry 12/100 End Cry End Cry Faun Faun 6 -40(Pt:b)v6 Fault 4 TD Cry 12/100 1d0 Tgt 2 0 1200 2400 3600 4800 Vertical Section(ft)Azim= 178.26°, Scale=1(in):1200(ft) Origin=0 N/-S,0 E/-V by 0 Schlumberger WELL FIELD Plan Z-40 (P15b) Prudhoe Bay Unit-WOA 5 RUC RE Z-PAD Magnet's Parameters Surface LocatDo NAD27 Alaska State Plane,Zone 04,US Feet Miscellaneous Model: BGGM2011 Dm 60.965' Date: February 20,2012 Lat N 701751516 Northing: 5959100.17805 Grit,Cony:0.76226647' Slot: 2.40(SI) TVD Ret: Rotary Tabe(90.311 above MSL1 Mag Dec: 20.915' FS'. 57647.OnT Lon: W 1491125.221 EasUng. 58996094 RUS Scale Fact:0.99991136 Plan'. Z-40(6155)46 Sny Date:August 19,2011 -800 0 800 RTE ��.\,. K0 0 • "� OP 1/100 Bld 2/100 .. ' Bld 2.5/100 End Bld ' Cry 3.5/100 -800 + -800 0F11 -'t,s nd Cry Cis 3.5/100 9-sir csy Z-40 Sch Tat Fault 1 End CM -1600 -1600 Cr 3.51100 •07 2 6700ss A End Cry A A Fault 2 Z $ -2400 or.-4/4e0 -2400 0 Dip End Cry auh3 0) (1) -3200 -sCO -3200 v v v End Cry Confidence Fa - is 14700 4000 -4000 �ltYe—Tv2 23D Flt's:;l/ nd Cry • —.• 5 -4800 11, -4800 :all Fault 6 11aii: a 13.51100 IIZ40 . ,I End Cry TD P15b)v6 -5600 -5600 -800 0 800 «< W Scale=1(in):800(ft) E >>> 95— Project: Prudhoe Bay Site: PB Z Pad Well: Plan lvi Z-40(SI)v6 90— Wellbore: Plan Z-40 Design: Plan#15 Z-40 v6 85— 80— 75— _ 70— 65— c_ 0_55— C O co a 50— a) to Equveiant Magnetic Distance 45 r o cu 40— i 35— 30— 13.1CchZ 211(SK) Ian#2Z-214 v6 25- 20— 15— r: Sch2-2-11-(cJ}v6/PIMi#52211-v6 10- 5— 0 , ' I I I ' ' " I ' ' ' ' I ' " I I 1 1 I I I 1 I 0 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950 2100 Measured Depth (300 ft/in) BPPASSPORT Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well Plan Ivi Z-40(SI)v6 Project: Prudhoe Bay TVD Reference: Z-40 plan current @ 90.30ft(Doyon 14) Reference Site: PB Z Pad MD Reference: Z-40 plan current @ 90.30ft(Doyon 14) Site Error: 0.00ft North Reference: True Reference Well: Plan Ivi Z-40(SI)v6 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan Z-40 Database: EDM.16-ANC Prod-WH24P Reference Design: Plan#15 Z-40 v6 Offset ND Reference: Offset Datum Reference Plan#15 Z-40 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 1,389.12ft Error Surface: Elliptical Conic Survey Tool Program Date 8/19/2011 From To (ft) (ft) Survey(Wellbore) Tool Name Description 34.30 500.00 Plan#15 Z-40 v6(Plan Z-40) GYD-GC-SS Gyrodata gyro single shots 500.00 2,000.00 Plan#15 Z-40 v6(Plan Z-40) MWD MWD-Standard 500.00 3,383.67 Plan#15 Z-40 v6(Plan Z-40) MWD+IFR+MS MWD+IFR+Multi Station 3,383.67 4,900.00 Plan#15 Z-40 v6(Plan Z-40) MWD MWD-Standard 3,383.67 9,441.29 Plan#15 Z-40 v6(Plan Z-40) MWD+IFR+MS MWD+IFR+Multi Station 9,441.29 10,940.00 Plan#15 Z-40 v6(Plan Z-40) MWD MWD-Standard 9,441.29 11,925.45 Plan#15 Z-40 v6(Plan Z-40) MWD+IFR+MS MWD+ IFR+ Multi Station 8/19/2011 2.•17:56PM Page 2 of 4 COMPASS 2003.16 Build 73 BPPASSPORT Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well Plan Ivi Z-40(SI)v6 Project: Prudhoe Bay TVD Reference: Z-40 plan current @ 90.30ft(Doyon 14) Reference Site: PB Z Pad MD Reference: Z-40 plan current @ 90.30ft(Doyon 14) Site Error: 0.00ft North Reference: True Reference Well: Plan Ivi Z-40(SI)v6 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan Z-40 Database: EDM.16-ANC Prod-WH24P Reference Design: Plan#15 Z-40 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 Plan Ivi Z-34(SM)v6-Plan Z-34-Plan#8 Z-34 vt 1,262.35 1,270.00 136.39 24.00 112.94 Pass-Major Risk Plan Ivi Z-50(SA)v6-Plan Z-50-Plan#8 Z-50 vE 688.46 690.00 151.04 11.53 139.51 Pass-Major Risk Plan Ivi Z-51 (NA)v6-Plan Ivi Z-Z51 -Plan#2 Z-f. 182.79 175.00 200.80 3.17 197.64 Pass-Major Risk Plan Ivi Z-55(SB)v6-Plan Z-55-Plan#4 Z-55 vE 650.89 650.00 135.76 11.38 124.38 Pass-Major Risk Plan lvi Z-57(ND)v6-Plan Z-57-Plan#4 Z-57 vt 424.71 420.00 171.60 7.92 163.68 Pass-Major Risk Plan Ivi Z-61 (NF)v6-Plan Z-61-Plan#4 Z-61 vE 410.09 405.00 150.37 7.64 142.73 Pass-Major Risk Plan Ivi Z-62(NC)v6-Plan Z-62-Plan#2 Z-62 vt 497.99 495.00 168.17 8.32 159.90 Pass-Major Risk Plan lvi Z-65(SE)v6-Plan Z-65-Plan#13 Z-65 x 629.21 630.00 75.87 10.78 65.09 Pass-Major Risk Plan Ivi Z-66(SC)v6-Plan Z-66-Plan#14 Z-66 539.71 540.00 120.76 10.00 110.76 Pass-Major Risk Plan Ivi Z-68(SP)v6-Plan Z-68-Plan#7 Z-68 556.92 555.00 190.43 9.86 180.57 Pass-Major Risk Plan Ivi Z-69(NJ)v6-Plan Z-69-Plan#3 Z-69 v6 405.23 400.00 142.63 7.55 135.08 Pass-Major Risk Plan Ivi Z-70(SF)v6-Plan Z-70-Plan#6 Z-70 vE 787.45 785.00 61.84 13.31 48.55 Pass-Major Risk Plan Kup Z-105(SN)v6-Plan Z-105-Plan#4 Z-1 642.29 635.00 160.49 10.95 149.54 Pass-Major Risk Plan Kup Z-105(SN)v6-Plan Z-105PB1 -Plan# 637.33 630.00 160.43 11.23 149.19 Pass-Major Risk Plan Kup Z-115(NG)v6-Plan Z-115 w/PH-Plan 353.78 355.00 145.27 6.76 138.51 Pass-Major Risk Plan Kup Z-115(NG)v6-Plan Z-115 wo/PH-Pla 353.78 355.00 145.27 6.60 138.67 Pass-Major Risk Plan Kup Z-115(NG)v6-Plan Z-115PB1-Plan# 353.78 355.00 145.27 6.76 138.51 Pass-Major Risk Plan Sch Z-201 (NM)v6-Plan Z-201 -Plan#6 Z-: 439.42 435.00 208.13 8.12 200.01 Pass-Major Risk Plan Sch Z-202(NB)v6-Plan Z-202-Plan#2 Z 277.80 270.00 189.84 5.20 184.64 Pass-Major Risk Plan Sch Z-203(SO)v6-Plan Z-203-Plan#3 Z 427.85 420.00 176.05 8.01 168.04 Pass-Major Risk Plan Sch Z-211 (SJ)v6-Plan Z-211-Plan#5 Z-2 537.65 530.00 15.77 9.88 5.90 Pass-Major Risk Plan Sch Z-212(NO)v6-Plan Z-212-Plan#3 Z-2 356.44 350.00 230.45 6.63 223.82 Pass-Major Risk Plan Sch Z-213(NL)v6-Plan Z-213-Plan#3 Z-2 346.66 340.00 149.78 6.45 143.33 Pass-Major Risk Plan Sch Z-214(SK)v6-Plan Z-214-Plan#2 Z-2 397.78 390.00 30.88 7.40 23.49 Pass-Major Risk Plan Sch Z-215(SH)v6-Plan Z-215-Plan#2 Z-2 556.83 550.00 27.32 9.91 17.45 Pass-Major Risk Plan Sch Z-216(NI)v6-Plan Z-216-Plan#2 Z-2 346.66 340.00 140.43 6.45 133.98 Pass-Major Risk Plan Sch Z-217(NN)v6-Plan Z-217-Plan#3 Z 332.02 325.00 218.92 6.16 212.77 Pass-Major Risk Plan Sch Z-218(NE)v6-Plan Z-218-Plan#2 Z-2 405.20 400.00 156.16 7.55 148.61 Pass-Major Risk Z-03-Z-03-Z-03 5,397.01 5,570.00 219.25 118.25 109.10 Pass-Major Risk Z-03-Z-03A-Z-03A 5,397.01 5,570.00 219.25 117.94 109.41 Pass-Major Risk Z-108-Z-108Z-108-Z-108-Z-108 7,635.58 7,432.00 922.53 104.96 824.91 Pass-Major Risk Z-11-Z-11 -Z-11 6,965.93 7,095.00 320.52 107.30 213.73 Pass-Major Risk Z-11-Z-11A-Z-11A 6,965.93 7,095.00 320.52 107.41 213.62 Pass-Major Risk Z-112-Z-112Z-112-Z-112-Z-112 5,541.02 5,610.00 560.21 75.37 484.83 Pass-Major Risk Z-112-Z-112PB1 -Z-112PB1 5,541.02 5,610.00 560.21 75.27 484.93 Pass-Major Risk Z-112-Z-112PB2-Z-112PB2 5,541.02 5,610.00 560.21 75.26 484.94 Pass-Major Risk Z-113-Z-113-Plan#7 Z-113 v6 353.68 355.00 142.02 6.76 135.26 Pass-Major Risk Z-113-Z-113-Z-113 34.30 34.30 141.53 0.91 140.62 Pass-Major Risk Z-113-Z-113PB1 -Plan#9 Z-113PB1 v6 353.68 355.00 142.02 6.76 135.26 Pass-Major Risk Z-113-Z-113PB1 -Z-113PB1 402.42 405.00 142.13 6.81 135.32 Pass-Major Risk Z-12-Z-12-Z-12 5,989.44 6,260.00 460.88 100.70 360.15 Pass-Major Risk Z-16-Z-16-Z-16 2,697.31 2,740.00 175.93 67.42 110.41 Pass-Major Risk Z-16-Z-16A-Z-16A 2,697.31 2,740.00 175.93 67.47 110.37 Pass-Major Risk Z-17-Z-17Z-17-Z-17-Z-17 3,555.06 3,690.00 244.73 83.43 161.90 Pass-Major Risk Z-18-Z-18-Z-18 1,805.36 1,870.00 165.94 49.11 125.75 Pass-Major Risk Z-19-Z-19-Z-19 760.44 765.00 224.72 18.04 206.70 Pass-Major Risk Z-19-Z-19A-Z-19A 759.82 760.00 224.71 18.07 206.65 Pass-Major Risk Z-20-Z-20-Z-20 717.25 720.00 194.13 12.05 182.08 Pass-Major Risk Z-46-Z-46-Z-46 921.73 915.00 234.06 16.43 217.83 Pass-Major Risk Z-46-Z-46A-Z-46A 921.73 915.00 234.06 16.48 217.79 Pass-Major Risk 8/19/2011 2:17:56PM Page 3 of 4 COMPASS 2003.16 Build 73 • Project: Prudhoe Bay Site: PB Z Pad Well: Plan lvi Z-40 (SI)v6 Wellbore: Plan Z-40 From Colour To MD Design: Plan #15 Z-40 v6 34 500 500 700 700 900 From Surface to TD 900 1200 Scan interval 100 ft 1200 1500 Scale 1 : 25 All wells pass Major Risk 1500 2000 • 2000 4000 87----Plan Sch Z-215(SH)v6/Plan#2 Z-215 v6 clan Sal L-211(sd)vtwon#5 Z-21 4000 7000 330 994 30 7000 10000 7 10000 12000 797 62 Plan Sch Z-214(SKI v6/Plan#2 900 50 300 Plan Ivi Z-€5(SE)v6/Plan#13 Z-65 v6 - 60 703 895 / 1 703 \\\\ 4.4 Mak N.ilk 2 7,„ vpi,„ 7�7 1, 7 1 270 �{ I lea I 3 :\ Aki 90 '602 Plan Ivi Z-70(S6v6/Plan A Z 70 - X1\04 803 1004 2 37 240 _ 120 210 150 180 Travelling Cylinder Azimuth (TFO+AZI)[0] vs Centre to Centre Separation [25 ft/in] • \ 4�,ji s C(rT ;"" ` 41,0 '4',IV—PAD ., l4' 1 1V 4� )4; '• ,*9 Si - GRID \ i.:? c ‘ ;y } + 9 ■ ■ 33 ( t 1 tt 1�A4 i}SPINE RD 6; 8 ■ ■ 32 .; SL 't . \ J 7 ■ II31 }�i i, " `','f W�PAD �} c 6 ■ ■ 30 h� f j t('[J 112 ■ Z-PAD I ti ' 5 ■ i ■ 29 ice' 1438 ■ ■ 21� 4 ■ • 28• 1021 t � ?-'^' ..,1 f a; t I 3 ■ ■ 2p7 ,.. THIS PROJECT 1 �, �\44, 'f ■ 1161 2 ■ 1041 r ,it 7 t . 1141 ■ ■ 1031 , ) / 5 • P 504AA yi,.f,.` `' ! ® _� ■ P-5048 t �� ME IESEI - VICINITY MAP Ii NTS ■ 21 • 22 39 a III 23 ii ■ ■ 24 12 • 25 13 ■ ■ 26 14 ■ ■ SLOT 1 y-�, 15 ■ • SLOee 4F q t 16 ■ ' • SLOT 4 Q.ys> ns,� t 17 ■18 • � ',.'° 'o-y 141 SURVEYOR'S CERTIFICATE w '.1}_1 '� • `:.t? '' I HEREBY CERTIFY THAT I AM 46 • �}" �,av 4 PROPERLY REGISTERED AND LICENSED 19 ■ Z-PAD d , TO PRACTICE LAND SURVEYING IN THE STATE OF ALASKA AND THAT 20 • ,' ""t n, - =-; THIS AS-BUILT REPRESENTS A SURVEY -� "a°° MADE BY ME OR UNDER MY DIRECT - :Q -' SUPERVISION AND THAT ALL 50 511 C° iGh4Cd F. Allison DIMENSIONS AND OTHER DETAILS ARE 66 202 j ��8 CORRECT AS OF JULY 02. 2011. SD 57 '' i', ; 65 t 81 70 _ 6181 1 Ess i fl{`r,1, ' .)<%. 2S5 113 is.l„��•,,.t. cC\S-5 °.R i 40 2141 69 SL �_ 2131NK LEGEND 203 217i 4 AS-BUILT CONDUCTOR 6B - 4221 ■ EXISTING WELL CONDUCTOR I NOTES: 1. ALASKA STATE PLANE COORDINATES ARE ZONE 4. :4AD 27. 2. HORIZONTAL CONTROL IS BASED ON Z PAD CONTROL MONUMENTS MON 2 AND MON 3. 3. VERTICAL CONTROL IS BASED ON Z PAD MONUMENTATION. N. 4. ELEVATIONS ARE BPX MEAN SEA LEVEL (M.S.L.) DATUM. 5. GEODETIC DATUM IS NA027. 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 POS. 1-75; N511-46 PGS. 1-9. AS-BUILT WELL CONDUCTORS: 7. 34i, 40, 42, 50, 511, 55, 57, 61, 62. 65, 66, 68, 69, 70, 105, 113, 115, 201, 202, 203. 211i. 2121, 213i, 2141, 2151. 216i, 2171. 2181, SD, SG, SL, NK __ ---- i", Robei 1.--. �.t+asw BARNHARr. - �. t o�: w1n JACOBS bp a I `r tsf 7/1/11 .-.... _ _ -, `FREH woz 21 WOA Z—PAD ,U! .—., :aSSOC� r ..._.... _., WRD PAD EXPANSION as 7/1/11 MUM KO M oomAnoN .. ..'.._. na .,, "' °A""°"' AS—BUILT WELL CONDUCTORS 1 u 3 m AM m•.cec VW 1r Y 200' ),o 1 04 If PrVIT404 fir u:,,, ur...rc •. " MU 1 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 34i 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 7017'52.965"1 70.2980458' . 4,431' FSL 42 X= 600,178.47 E= 2,009.96 149"11'19.409 149.1887247' 56'0 2,497' FEL ' y ,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' 56.2' 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' FEL 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 Y=5,959,240.04 N= 1,421.49 70'17'53.005' 70.2980569' 4,435' FSL 57 X= 599,883.46 E= 2,010.05 149'11'28.009" 149.1911136' 55.9' 2,792' FEL Y=5,959,239.97 . N= 1,376.44 70'17'52.998" 70.2980550' i 4,434' FSL. 61 X= 599,928.50 E= 2,009.98 14911'26.695" 149.1907486' 55 9 ,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= 2,009.95 149'11'28.445" 149.1912347' 56'0' 2,807' FEL y= 5,959,100.15 N= 1,398.94 70'17'51.626" 70.2976739' 4,295' FSL 65 X= 599,906.01 I E= 1,870.14 14911'27.405" 149.1909458' 56.1 2,772' FEL Y= 5,959,100.11 N= 1,443.99 70'17'51.632 70.2976756' 4,295' FSL 66 X= 599,860.96 E= 1,870.11 149'11'28.719" 149.1913108' 56'2 2.817' FEL 68 Y=5,959,100.23 N= 1,134.00 70'17'51.592" 70.2976644' 55.9' 4,291' FSL X= 600,170.92 E= 1,870.22 I 149'11'19.683" 149.1888008' 2,507' FEL Y=5,959,239.94 N= 1,301.49 70'17'52.988" 70.2980522' 4433' FSL fig X= 600,003.45 E= 2,009.95 14911'24.511" 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 "5 ,X= 600,141.04 E= 1,870.04 149'11'20.554" 149.1890428' 55'9 2,537' FEL 113 Y=5,959,239.90 N= 1,346.45 70'17'52.994" 70.2980539' 56.0' 4,434' FSL i X= 599,958.49 , E= 2,009.91 149'11'25.821" 149.1905058' 2,717' FEL 115 "Y=5,959,240.03 N= 1,361.38 I 70'17'52.997", 70.2980547' 55.9' 4,434' FSL X= 599,943.56 E= 2,010.04 1 149'11'26.256"1 149.1906267' • 2,732' FEL NOTFS: 1. ALASKA STATE PLANE COORDINATES ARE NA027, 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 [S 0.999911213. AS—BUILT WELL CONDUCTORS' 34i, 40, 42, 50, 51i, 55. 57, 61, 62, 65, 66, 68, 69, 70, 105, 113, 115. 201, 202, 203, 211i, 212i, 2131, 214i, 2151, 216i. 217i, 218i, SD, SG, SL, NK '1* .' ,.»............. .. ....� .. r ElOI7E'1"1,^+. BARNHART JACOBS p ¢ 1; 7/1/11 , .m— iiSSq7pufi ":FRe WOZ 21 WOA Z PAD _ .._ ____. _,_ MN 1 v ,N N ___ WRD PAD EXPANSION 0a /rf;{1SSlED FOR INFORMAnoN — `her J� _ Zai. AS-BUILT WELL CONDUCTORS o i i.A 1' I 't''VI:i I C,J k I i LOCATED WITHIN PROTRACTED SEC. 19, T. 11 N., R. 12 E., UMIAT MERIDIAN, ALASKA WELL[ A.S.P. PLANT GEODETIC GEODETIC GRAVEL SECTION NO. COORDINATES COORDINATES POSITION(DMS) POSITION(D.DD) PAD ELEV. OFFSETS Y=5,959,240.18 N= 1,171.46 70°17'52.973" 70.2980481 c 4,432' FSL 201 X= 600,133.47 E= 2,010.19 149'11'20.721" 149.1890892° 36.6' 2,542' FEL Y=5,959,239.94 N= 1,451.46 70'17'53.008" 70.2980578' 4,435' FSL 202 X= 599,853.49 E= 2,009.95 149°11'28.882" 149.1913561' 55.9' 2,822' FEL Y=5,959,100.03 N= 1,148,96 70'17'51.592" 70.2976644' 4,291' FSL 203 ,X= 600,155.96 E= 1,870.02 149'11'20.119" 149.1889219° 56'0' 2,522' FEL 'Y=5,959,100.23 yN= 1,308.95 70'17'51.615" 70.2976708' 55.9' 4,293' FSL 211 X= 599,995.99 E= 1,870.22 , 149'11'24.783" 149.1902175' 2,682' FEL Y= 5,959,240.11 N= 1,141.47 70'17'52.969"i 70.2980469' 4,431' FSL G 212i X= 600,163.45 E= 2,010.12 149'11'19.847" 149.1888464' 56.4' 2,512' FEL - Y=5,959,240.04 N= 1,271.44 70'17'52.985" 70.2980514° ` 4,433' ESL 213i 56.1 X= 600,033.50 E= 2,010.05 149'11'23.635" 149.1898986' 2,642' FEL 214i Y=5,959,100.25 N= 1,293.88 70'17'51.613" 70.2976703' 562' 4,293' FSL X= 600,011.06 E= 1,870.24 149'11'24.343" 149.1900953' . 2,667' FEL. 2151 . Y=5,959,100.14 N= 1,354.05 70'17'51.620" 70,2976722' 562' 4,294' FSL X= 599,950.89 E= 1,870.13 149°11'26.097" 149.1905825° 2,727' FEL _. Y=5,959,240.09 N= 1,316.42 70°17'52.992"I1 70.2980533' 4,433' FSL X161 X= 599,988.52 E= 2.010.10 149'11'24.946", 149.1902628' 56'0 2,687' FEL � Y=5,959,239.98 N= 1,156.36 70'17'52.970" 70.2980472' 4,431' FSL 2171 X= 600,148.56 E= 2,009.99 149'11'20.281" 149.1889669° 56.2' 2,527' FEL Y=5,959,239.98 N= 1,391.46 70'17'53,000" 70.2980556° 55.9' 4,434' FSL 2181 X= 599,913.48 E= 2,009.99 149'11'27.133" 149.1908703' 2,762' FEL Y= 5,959,100.11 N= 1,429.03 70'17'51.630" 70.2976750' 4,295' FSL SD X= 599,875.92 E= 1,870.10 149'11'28.283" 149.1911897' 56.4' 2,802' FEL SG . Y=5,959,100.09 N= 1,369.02 '70"17'51.621" 70.2976725' 562' 4,294' FSL X= 599,935.92 E= 1,870,08 149°11'26.533" 149.1907036' 2,742' FEL i y= 5,959,100.01 N= 1,279.00 70'17'51.609" 70.2976692' ` 4,293' FSL SL X= 600,025.94 E= 1,870.00 I 149'11'23.910" 149.1899750' 1 56.3' 2,652' FEL NK Y=5,959,239.85 N= 1,286.54 . 70°17'52.985" 70.2980514' S6 0' 4,433' FSL X= 600,018.40 E= 2,009.86 1 149'11'24,075", 149.1900208' i 2,657' FEL NOTES: 1. ALASKA STATE PLANE COORDINATES ARE NA027, 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. 6. ALPHA NAME DESIGNATIONS REFER TO BPX DRILLING 1 SURFACE SLOT NAME 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, 2121, 2131, 2141, 215i, 2164 217, 2184 SD, SG, SL, NK ] ..._..._. fI _ ... F. 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M N . . CT Q c Q O a O W 0 O O O O O O O 0 0 0 0 0 0 0 0 0 0 L() O L() O Liz 0 0 0) 0) CO (0 (0 Ln LU LU Land Administration System Page 1 of 2 Alaska Department of Natural Resources Alaska DNR Case Summary File Type: ADL File Number: 47453 See Township,Range,Section and Acreage? Yes No New Search 4111, File: ADL 47453 Search for Status Plat Updates As of 12/27/2011 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E.BENSON BL ATTN:LAND MANAGER-ALASKA ANCHORAGE AK 995196612 Case Type:784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status:35 ISSUED Status Date: 09/30/1969 Total Acres: 2491.000 Date Initiated:08/10969 1969 Office of Primary Responsibility:DOG DIV OIL AND GAS Last Transaction Date:12/04/2006 Case Subtype: NS NORTH SLOPE Last Transaction:AA-NRB ASSIGNMENT APPROVED Meridian: U Township: o11N Range: 012E Section: 29 Section Acres:64o Search Plats Meridian: U Township: o11N Range: 012E Section: 3o Section Acres:604 Meridian: U Township: (11N Range: o12E Section: 31 Section Acres:607 Meridian: U Township: o11N Range: oi2E Section: 32 Section Acres:64o Legal Description 08-11-1969***SALE NOTICE LEGAL DESCRIPTION*** C23-o38 Ti1N-1212E-UM GENERAL 29 640.00 ALL 30 604.00 ALL 31607.00 ALL 32 640.00 ALL TOTAL ACRES-2491.00 04-01-1977"**UNITIZED LEASE AND OIL RIM AND GAS CAP PARTICIPATING***** AREAS LEGAL DESCRIPITION PRUDHOE BAY UNIT TRACT 81 OIL RIM AND GAS CAP PARTICIPATING AREAS T.it N.,R.12 E.,U.M. SECTION 29:ALL,640.00 ACRES; SECTION 3o:ALL,604.00 ACRES; SECTION 31:ALL,607.00 ACRES; SECTION 32:ALL,640.00 ACRES; CONTAINING APPROXIMATELY 2,491 ACRES,MORE OR LESS. o2-01-2004*******ORION PARTICIPATING AREA LEGAL DESCRIPTION*********** PRUDHOE BAY UNIT http://dnr.alaska.gov/projects/las/Case Sumrnary.cfm?FileType=ADL&FileNumber=474... 12/27/2011 Land Administration System Page 1 of 3 \It.ka Department of Natural Resources Alaska DNR Case Summary File Type: ADL File Number: 28262 See Township,Range,Section and Acreage? Yes No ( New Search i File: ADL 28262 "N Search for Status Plat Updates As of 12/27/2011 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E.BENSON BL ATTN:LAND MANAGER-ALASKA ANCHORAGE AK 995196612 Case Type:784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status:35 ISSUED Status Date: 08/26/1965 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: ouN Range: 012E Section: 17 Section Acres:64o Search Plats Meridian: U Township: ot1N Range: 012E Section: 18 Section Acres:599 Meridian: U Township: o11N Range: oi2E Section: 19 Section Acres:601 Meridian: U Township: o11N Range: 012E Section: 20 Section Acres:640 Legal Description 05-28-1965*5*SALE NOTICE LEGAL DESCRIPTION*** C14-58 TI IN,R12E,UM 17,18,19,20 2,480.00 12-04-1969***ASSIGNMENT LEGAL DESCRIPTION*** SEGMENT 1 T11N,R12E,UM SECTION 17:640 ACRES SECTION 18:599 ACRES SECTION 19:601 ACRES CONTAINING 1840 ACRES,MORE OR LESS. SEGMENT 2-LANDS ASSIGNED TIIN,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; http://dnr.alaska.gov/projects/1as/Case Summary.cfm?FileType=ADL&FileNumber=282... 12/27/2011 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 S21 Z-�o PTD# Development Service Exploratory Stratigraphic Test Non-Conventional Well FIELD: /�-,E`/�,i/ .0 AJC POOL: f�.el�aaz./e' ,/ 0/0/G 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 orproduction testingof 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 11 0 D o I- a co 0 -o 5 p 1�M1'`1 Cl cn v o cn a 3 -, I"' 0 CO CD 3 3 0 K CD N -, 3 0 N_ 7 N M m.(n N 0 0 N 0 3 w o 5. 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