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Home My WebLink About195-043 Pages NOT Scanned in this Well History File XHVZE This page identifies those items that were not scanned during the initial scanning project. They are available in the original file and viewable by direct inspection. \ ~ 5' () y 3 File Number of Well History File PAGES TO DELETE Complete RESCAN o Color items - Pages: o Grayscale, halftones, pictures, graphs, charts - Pages: o Poor Quality Original - Pages: o Other - Pages: DIGITAL DATA o Diskettes, No. o Other, No/Type OVERSIZED o Logs of various kinds o Other COMMENTS: Scanned by: Beverly Date: l{ -, 151 Ð!J o TO RE-SCAN Notes: Re-Scanned by: Beverly Dianna Vincent Nathan Lowell Date: 151 STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG / RECEIVED OCT 1 2 2004 1a. Well Status: D Oil DGas D Plugged a Abandoned D Suspended DWAG 1b. ~§§~@I'& Gas Cons. Commissi 20AAC 25.105 20AAC 25.110 a DevelopmentH@~@ratory DGINJ DWINJ D WDSPL No. of Completions Zero Other D Stratigraphic e Ice 2. Operator Name: 5. Date Comp., Susp., or Aband. 12. Permit to Drill Number ¡/'. BP Exploration (Alaska) Inc. 6/28/2004 195-043 /' 304-231 3. Address: 6. Date Spudded 13. API Number / P.O. Box 196612, Anchorage, Alaska 99519-6612 04/21/1995 50- 029-21950-01-00 4a. Location of Well (Governmental Section): 7. Date T.D. Reached 14. Well Name and Number: Surface: 04/28/1995 PBU Z-23A ,- 4560' NSL, 3214' WEL, SEC. 19, T11N, R12E, UM 8. KB Elevation (ft): 15. Field I Pool(s): Top of Productive Horizon: 518' NSL, 3274' WEL, SEC. 18, T11 N, R12E, UM 81.04' Prudhoe Bay Field I Prudhoe Bay Total Depth: 9. Plug Back Depth (MD+ TVD) Pool 625' NSL, 3303' WEL, SEC. 18, T11 N, R12E, UM 8284 + 8069 Ft 4b. Location of Well (State Base Plane Coordinates): 10. Total Depth (MD+TVD) 16. Property Designation: Surface: x- 599459 y- 5959360 Zone- ASP4 9580 + 9248 Ft ADL 028262 TPI: x- 599377 y- 5960596 Zone- ASP4 11. Depth where SSSV set 17. Land Use Permit: Total Depth: x- 599347 y- 5960703 Zone- ASP4 N/A MD 18. Directional Survey 19. Water depth, if offshore 20. Thickness of Permafrost DYes aNo N/A MSL . 1900' (Approx.) 21. Logs Run: DIL, BHC, CNL, GR 122. C ASING, LINER AND CEMENTING RECORD CASING '~i:..·. ... ..<'< « "'< AMOUNT SIXE WT;iPeFtFT. GRAPE .~ ..... ..,.,gV'J"I'œ 'fOP ~. .... RECORD Puû.ED 20" Conductor Surface 118' Surface 118' 13-3/8" 68# L-80 Surface 2657' Surface 2657' 17-1/2" 3684 cu ft Permafrost 9-518" 47# NT80S Surface 7472' Surface 7369' 12-1/4" 1894 cu ft Class 'G' 7" 29# NT80S 7285' 9575' 7212' 9243' 8-1/2" 372 cu ft Class 'G' 23. Perforations oRen to Production (MD + TVD of T 0,£ and 24. .............'...,. TUBING REcoRd Bottom Interval, Size and Number; if none, state none"): SIZE DEPTH SET (MD) PACKER SET (MD) None 4-1/2", 12.6#, L-80 7390' - 8996' 8996' MD TVD MD TVD 25. ACI~,~~>pa.u:.NTSQUEEZE.E'1"C. DEPTH INTERVAL (MD) AMOUNT & KIND OF MATERIAL USED 9073' Set 1st Whipstock (tubing tail dropped on top) / 9010' Set 2nd Whipstock (dropped grapple & mill on top) 8284' P&A with 11 Bbls Class 'G' /' 6718' Set EZSV with Whipstock on top /' 26. PRODUCTION TEST Date First Production: Method of Operation (Flowing, Gas Lift, etc.): Not on Production N/A Date of Test Hours Tested PRODUCTION FOR OIL-BBL GAs-McF WATER-BBL CHOKE SIZE 1 GAS-OIL RATIO TEST PERIOD .. Flow Tubing Casing Pressure CALCULATED + OIL-BBL GAs-McF W ATER-BBL OIL GRAVITY-API (CORR) Press. 24-HoUR RATE 27. CORE DATA Brief description of lithology, porosity, fractures, apparent dips and presence of oil, gas or water (attach separate sheet, if necessary). Submit core chips; if none, state "none". None ORIGINAL ~~ Form 10-407 Revised 12/2003 CONTINUED ON REVERSE SIDE ~~ ~ n ~~ 28.. GEOLOGIC MARKERS 29. FORMATION TESTS NAME MD TVD Include and briefly summarize test results. List intervals tested, and attach detailed supporting data as necessary. If no tests were conducted, state "None". Sag River 9004' 8702' None Shublik 9035' 8731' Sadlerochit I Zone 4 9190' 8875' REC·,E.\\IEO OC11 '21\)\)4 . ',,,r\ r ,,'ii. comm\ßS"" Q'II I.;¡. ,'oJ .",Q II',. \\\t~a _"""8 '" 1\í\(,\\\.I\"''' 30. List of Attachments: Summary of Pre-Rig Work and Daily Drilling Reports 31. I hereby certify that the foregoing is true and correct to the best of my knowledge. Signed Terrie Hubble ~11.; 0 H" ~ Title Technical Assistant Date 10- {a -0<-/ PBU Z-23A 195-043 304-231 Prepared By Name/Number: Terrie Hubble, 564-4628 Well Number Permit No. I Approval No. Drilling Engineer: Jim Smith, 564-5773 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. ITEM 1a: Classification of Service Wells: Gas Injection, Water Injection, Water-Altemating-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 elevation in feet above mean low low water. 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: True vertical thickness. ITEM 22: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. ITEM 23: 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 26: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-In, or Other (explain). ITEM 27: If no cores taken, indicate "None". ITEM 29: List all test information. If none, state "None". Form 10-407 Revised 12/2003 Submit Original Only Well: Field: API: Permit: Z-23B Prudhoe Bay Unit 50-029-21950-02-00 204-108 Accept: Spud: Release: Rig: 07/05/03 N/A 07/08/03 Nordic #1 Accept: Spud: Release: Rig: 08/22/04 08/26/04 09/09/04 Doyon 16 PRE-RIG WORK OS/26/03 PULLED SIO GLV FROM STA. # 1 & LGLV'S FROM STA.'S # 3, & 4. DUMMIED OFF STA'S 1,3 & 4. PULL CIS. START IN HOLE WI DUMMY WHIPSTOCK. OS/27/03 UNABLE TO DRIFT WI DUMMY WHIPSTOCK (3.72 X 20') WI KJ & WI OUT KJ ON TOP OF DRIFT, SAT DOWN @ 7,611'. DRIFTED TO 9,150' WI 3.70 X 12'-5" BAR BELL (3.70 CENTRALIZER TOP 13.70 GAUGE RING ON BOTTOM). DRIFTED TO 7,700' WLM WI DMY WHIPSTOCK WI KJ ABOVE THE SPANGS & GR (TOOLS STOPPED). DISPLACE TBG WI DEAD CRUDE, FLUID LEVEL @ 6,300' WLM. RIH WI PUMP @ 3/4 BPM 1185 FPM, SAW SMALL BOBBLE @ 7,530' WLM, SID PUMP @ 7,800' WLM, CONTINUE IN FOR A GOOD DRIFT @ 9,160' WLM, PUH TO 7,400', SAW SLIGHT BOBBLE @ 7,660' WLM. RIH WIOUT PUMP TO 7,885, CLEAR. SAW FLUID LEVEL @ 1,500' WLM. RETURNED WELL TO PAD OP, TO REMAIN SII. 06/23/03 ATTEMPTED TO SET IRPP WI MID ELEMENT @ 9146' MD (INCOMPLETE OPERATION - PACKER CAME BACK TO SURFACE WITHOUT DISCONNECTING) - TOOL = E-HEAD/AH38/GO ADAPTERISETTING ASSY WITH CCUWEATHERFORD IRPP = 35.7 FT X 3.375" MAX OD. SET IRPP - CCL DEPTH = 9121.5 FT MD - CCL TO CENTER ELEMENT = 26.5 FT (9148 FT MD) TOP AT 9140.4 FT MD. BOTTOM OF ASSY AT 9153.9 FT MD (38 FT ABOVE TOP OF PERFS). WELL LEFT SHUT IN. 06/27/03 SET BAKER PIP AND WHIPSTOCK. MID ELEMENT OF PIP SET AT 9148 FT MD. BOTTOM OF PIP SET AT 9154.3 FT MD (ABOUT 38 FT ABOVE TOP OF PERFS). TESTED PIP WITH 1000 PSI WHP FOR 30 MINUTES- BLED DOWN TO 950 PSI IN 10 MINUTES AND HELD. SET BAKER WHIPSTOCK, TOP SET AT 9073 FT MD. RA TAGS (2) SET AT 9083 FT MD. TRAY SET 3 DEG LEFT OF TDC. DEPTH CORRELATED TO WESTERN ATLAS BOND LOG DATED 11-MAY-1995. LEFT WELL SHUT IN. AT THIS POINT NORDIC #1 MOVED ONTO THE WELL TO BEGIN OPERATIONS. HOWEVER, MULTIPLE FISH WERE LEFT IN THE HOLE RESULTING FROM FAILED COIL TUBING DRILLING SIDETRACK EFFORTS, THE RIG MOVED OFF THE WELL WITHOUT EXITING THE CASING, PENDING A NEW FORWARD PLAN. SEE ATTACHED OPERATIONS SUMMARY. 06/23/04 DRIFTED WI 3.50" CENT, TT LOC, SAMPLE BAILER. TAGGED @ 9010' CORRCTED TAG. SAMPLE BAILER CAME BACK WITH WHAT APEARS TO BE FLOW PRO. 06/28/04 ~ MUIRIH WI SLICK 1.75" BDN BHA. TAG WS @ 9017'. CIRC KILL WELL WI KCL. LAY I 11 BL NEAT CLASS "G" CEMENT, TRAP 700 PSI WHP FOR 30 MINS. DROP 3/4" BALL & CONTAMINATE . 10 TO 8300'. JET OUT @ 80%. FP WELL TO 2500' WITH 50/50 METH. ESTIMATE TOC @ 8300'. LEFT WELL SI. .------ . 06/30/04 DRIFTED WITH 3.70" CENTRALIZER AND SAMPLE BAILER. TAGGED CEMENT TOP AT 8284' SLM. BAILER EMPTY. 07/04/04 CHEMICAL CUT 4-1/2 TBG AT 7390 FT. TBG PUNCH AT 7367-7369 FT. MISFIRE ON FIRST ATTEMPT TO PUNCH TBG. Page 1 of 4 Q,perations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 6/7/1989 Event Name: REENTER+COMPLETE Start: 7/3/2003 End: 7/14/2003 Contractor Name: NORDIC CALISTA Rig Release: 7/8/2003 Rig Name: NORDIC 1 Rig Number: N1 Date From - To Hours I Task Code NPT I Phase Description of Operations 7/212003 21:15 - 21:30 0.25 RIGD P PRE Rig released from A-30L1 @ 21:15Hrs on 7/2/2003. PJSM with Peak crane crew for swapping out CT reels. 21 :30 - 22:45 1.25 RIGD P PRE P/U CT reel & remove RHS bushing. Lower reel to Peak double drop trailer. GBR welder remove LHS bushing. Replace bushings. 22:45 - 23:15 0.50 RIGD P PRE P/U new CT reel into reel house & align drive pins. Meanwhile GBR welder install newly constructed step for accessing the level work platform for BOP work in cellar. 23:15 - 00:00 0.75 RIGD P PRE RIU hardline to inner reel valve. - 0.00 P PROD1 For Dims Cost. - 0.00 P POST For Dims Cost. 7/3/2003 00:00 - 01 :00 1.00 RIGD P PRE Continue RIU hardline to inner reel valve. Finish installing step landing in cellar. RIU tilt rams. 01 :00 - 10:00 9.00 RIGD N WAIT PRE W.O. wind to UD windwalls and scope down derrick. Wind gusting @ 25mph. 10:00 - 11 :00 1.00 MOB P PRE PJSM. Move rig off well & set down on pad. Clean cellar area & prep for rig down. 11 :00 - 16:30 5.50 RIGD N WAIT PRE W.O. wind to UD windwalls and scope down derrick. Wind gusting >20mph. 16:30 - 16:45 0.25 MOB P PRE Held PJSM for UD wind walls. 16:45 - 18:15 1.50 MOB P PRE UD windwalls. 18:15 - 18:30 0.25 MOB P PRE Crew change. Held PJSM for UD derrick. 18:30 - 20:15 1.75 MOB P PRE UD derrick. 20:15 - 21 :30 1.25 MOB P PRE Prep move rig. Meanwhile conduct post operations pad inspection with DSO. Review pre rig move checklist. 21 :30 - 22:00 0.50 MOB P PRE Held pre-move safety meeting with Security, tool service, CPS & all personnel. 22:00 - 00:00 2.00 MOB P PRE Move rig from A-30L 1 enroute to Z-23. 7/4/2003 00:00 - 06:00 6.00 MOB P PRE Moving rig to Z-23. Passing the Kuparuk river channel crossings as @ 06:00AM. 06:00 - 15:00 9.00 MOB P PRE On Z pad in front of well. Had minor spill during move due to pin-hole leak in hydraulic hose to pressure gauge inside the driver control room (Incident Report: 2003-IR-559480). Conduct pre operations pad inspection with DSO. 15:00 - 15:30 0.50 MOB P PRE SAFETY MEETING. Review procedure, hazards and mitigation to raise windwalls and mast. 15:30 -16:45 1.25 RIGU P PRE Raise Mast and wind walls. 16:45 - 17:30 0.75 RIGU P PRE Secure guy wires. Secure tilt rams in storage frame. 17:30 - 18:15 0.75 RIGU P PRE PJSM. Pick up injector head. 18:15 - 18:45 0.50 RIGU P PRE Crew change & PJSM for M/U guide arch. 18:45 - 20:00 1.25 RIGU P PRE M/U guide arch. 20:00 - 20:15 0.25 RIGU P PRE PJSM for stabbing CT into injector head. 20:15 - 22:30 2.25 RIGU P PRE Stab CT thru gooseneck into injector head. Meanwhile lay 6 rig mats in front of well to prevent sinking on soft pad. 22:30 - 23:00 0.50 RIGU P PRE Prep tree & check for pressures: WHPIIAP/OAP/FLP = 100/0/120/0 psi. Jack up rig for backing over well. 23:00 - 23:15 0.25 RIGU P PRE PJSM for backing rig over well. Review procedure, hazards & mitigation. 23:15 - 00:00 0.75 MOB P PRE Back rig over well & set down. 7/5/2003 00:00 - 04:00 4.00 BOPSUF P DECOMP Accept rig @ OO:OOhrs on 7/5/2003. PJSM. N/U BOPE. Had to realign choke & kill lines to prevent binding on cellar handrails. Meanwhile spot trailers & tanks. P/test hardline to flowback tank to 3200psi. Printed: 71912003 9:02:11 AM Page 2 of 4 Operations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 6/7/1989 Event Name: REENTER+COMPLETE Start: 7/3/2003 End: 7/14/2003 Contractor Name: NORDIC CALISTA Rig Release: 7/8/2003 Rig Name: NORDIC 1 Rig Number: N1 Date From - To Hours Task Code NPT Phase Description of Operations 7/5/2003 04:00 - 04:30 0.50 BOPSUF P DECOMP RIU for testing BOPE. 04:30 - 11 :30 7.00 BOPSUF P DECOMP Perform initial BOPE pressure/function test. AOGCC test witness waived by John Crisp. 11 :30 - 13:00 1.50 BOPSUF P DECOMP Change out CT pack off. M/U BKR CTC. Pull test. Fill rig pits with 2% KCL water. 13:00 - 14:00 1.00 BOPSUF P DECOMP Insert dart, Fill CT. Recover dart. Did not see dart land. 14:00 - 14:30 0.50 STWHIP P WEXIT SAFETY MEETING. Pre-spud meeting with personnel. PJSM for M/U Milling BHA. 14:30 - 15:15 0.75 STWHIP P WEXIT M/U BKR 3.80" window milling BHA. 3.80 HC diamond window mill, straight motor. BHA = 83.3 ft. 15:15 - 16:45 1.50 STWHIP P WEXIT RIH with BHA #1. Take returns to tiger tank. Up wt at 9000 ft = 40K, Own wt = 28K. 16:45 - 18:15 1.50 STWHIP P WEXIT Tag XN nipple at 9049 ft, correct to 9030' [-19ft CTD], Free spin = 1170 psi, at 2.5 bpm. Mill XN with 50 psi motor work and min. WOB. Set pump kick out at 1500 psi. Back ream and ream down. Clean. Pick up and run thru with no pump. 18:15 - 19:00 0.75 STWHIP P WEXIT RIH & see motor work @ 9062'. Tag @ 9072'. P/U & dry tag @ 9080.8'. Establish free spin @ 2.6bpm/1150psi. Up wt = 38.5k & Down wt = 28k. Lightly tag WSllnr pinch pt @ 9080.6' with motor work. Flag pipe & correct depth to 9077.6' (pinch pt ELMD). 19:00 - 19:30 0.50 STWHIP P WEXIT Start milling window from 9077.6' with 1/2ppb biozan. Mill to 9078.6' with 2.6/2.6bpm, 1150/1380psi, 1k WOB & 2fph ave ROP. P/U clean @ 38k & ease back into milling. 19:30 - 20:00 0.50 STWHIP P WEXIT Mill to 9078.8' with 2.6/2.6bpm, 1350/1450psi, 4k WOB & 0.5fph ave ROP. Stacking wt with no drill off. PUH clean @ 39k to 9020' above the XN nipple. RBIH & see motor work @ 9063'. Dry drift clean thru. PUH & lightly tag again @ 9062.7'. Suspect the tbg tail backed off from the XN. From XN to tbg tail = 13' which jives to where we're tagging on. 20:00 - 20:45 0.75 STWHIP N DPRB WEXIT Discuss with ANC & decide to run GRlCCL to confirm downhole situation before setting another whipstock. Call for SWS E-Line unit & another Baker Gen II thru-tbg whipstock. 20:45 - 22:40 1.92 STWHIP N DPRB WEXIT POOH with window milling BHA#1. See motor work & O/pull spike @ 8999'. Continue POOH to surface. Meanwhile troubleshoot DS depth encoding system. 22:40 - 23:05 0.42 STWHIP N DPRB WEXIT PJSM for UD window milling BHA. 23:05 - 23:30 0.42 STWHIP N DPRB WEXIT UD & inspect milling BHA#1. String reamer looks OK. DSM window mill has a 1" x 1" core on its face indicating milling on TOWS. 23:30 - 00:00 0.50 STWHIP N DPRB WEXIT Close swab & W. O. SWS E-Line unit. 7/6/2003 00:00 - 00:15 0.25 STWHIP N DPRB WEXIT Continue W. O. SWS E-Line unit. 00:15 - 00:30 0.25 EVAL N DPRB WEXIT Held PJSM with SWS logging crew on RIU & GRlCCL run. 00:30 - 01 :15 0.75 EVAL N DPRB WEXIT RIU SWS unit for E-line job. Meanwhile open up well. Observe well stable. 01 :15 - 01 :45 0.50 EVAL N DPRB WEXIT M/U SWS 3-5/8" X 12' GRlCCL tools on E-Line. 01 :45 - 02:45 1.00 EVAL N DPRB WEXIT RIH with SWS GRlCCL logging tools to 8900'. Wt check - Up = 3450lbs & Down = 24501bs. 02:45 - 03:00 0.25 EVAL N DPRB WEXIT Log GRlCCL & tag up 2x @ 9040' ELM. Log up to 9008' (CCL depth) & got hung up with E-Line head @ 8998' ELM (packer btm). Printed: 71912003 9:02:11/W1 Page 3 of4 Operations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 6/7/1989 Event Name: REENTER+COMPLETE Start: 7/3/2003 End: 7/14/2003 Contractor Name: NORDIC CALISTA Rig Release: 7/8/2003 Rig Name: NORDIC 1 Rig Number: N1 Date From - To Hours Task Code NPT Phase Description of Operations 7/6/2003 03:00 - 03:15 0.25 EVAL N DPRB WEXIT Pull on E-Line several times & finally pull free with 65001bs. 03:15 - 03:30 0.25 EVAL N DPRB WEXIT Log up to 8850'. Reviewed up/down log data & observe that tbg tail backed-off below the packer. 03:30 - 04:30 1.00 EVAL N DPRB WEXIT POOH with E-Line tools. Meanwhile review forward plan with ANC & decide to set another WS @ ca 9010' with worst case TOF @ 9030' & 7" collars @ 9008' & 9050'. 04:30 - 05:00 0.50 EVAL N DPRB WEXIT UD E-Line tools. 05:00 - 06:45 1.75 WHIP N DPRB WEXIT Prep to set another Baker Gen II thru-tbg whipstock. 06:45 - 07:00 0.25 WHIP N DPRB WEXIT SAFETY MEETING. Review procedure, hazards and mitigation to M/U BKR whipstock on SWS running tools. 07:00 - 08:00 1.00 WHIP N DPRB WEXIT M/U BKR Gen II whipstock on SWS E-line. 08:00 - 09:45 1.75 WHIP N DPRB WEXIT RIH with BKR whipstock on SWS E-line. Tied-in with GR / CCI. Set top of whipstock at 9010'. Tool face = 2 deg left of high side. Set down OK and log off. RA tag at 9020'. 09:45 - 11 :30 1.75 WHIP N DPRB WEXIT POH with SWS running tools. 11 :30 - 12:00 0.50 WHIP N DPRB WEXIT RID SWS E-line equipment. 12:00 - 12:15 0.25 STWHIP N DPRB WEXIT SAFETY MEETING. Review procedure, hazards and mitigation to M/U BKR Window milling BHA. 12:15 - 13:15 1.00 STWHIP N DPRB WEXIT M/U 3.80" HC Diamond mill, 3.80" string reamer, straight motor and BKR tools. BHA = 83.3'. 13:15-15:00 1.75 STWHIP N DPRB WEXIT RIH with window milling BHA #2. Up wt = 38K at 8980'. Dwn wt = 27K. 15:00 - 17:15 2.25 STWHIP N DPRB WEXIT Tag whipstock at 9036 ft. Correct depth to 9015 ft CTD [-21 ft]. Several stalls to get started milling window. Unable to get milling. Flag CT at TD at 9015 ft. Flag CT at 8800 ft EOP. 17:15 - 18:40 1.42 STWHIP N DPRB WEXIT POH with milling BHA to check mill and motor. 18:40 - 18:55 0.25 STWHIP N DPRB WEXIT PJSM for UD window milling BHA. 18:55 - 19:25 0.50 STWHIP N DPRB WEXIT UD & inspect milling BHA#2. Observe no DSM window mill on BHA. Threads on string reamer looks galled with flattened crest. Call for S/L unit. 19:25 - 21 :30 2.08 STWHIP N DPRB WEXIT Close swab & W. O. HOWCO S/Line unit. 21 :30 - 21 :45 0.25 FISH N DPRB WEXIT Held PJSM with HOWCO S/L crew & all personnel for slickline operations. 21 :45 - 22:10 0.42 FISH N DPRB WEXIT RlU HOWCO unit for S/L job. Switch line to 0.125" SIlo Meanwhile open up well. Observe well stable. 22:10 - 23:05 0.92 FISH N DPRB WEXIT M/U 3.73" LIB, 2' x 1-7/8" stem, ac, LSS, ac, OJ, KJ, 8' x 2-1/8" & 1-3/4" RS on 0.125" S/L (OAL - 22.15'). 23:05 - 23:45 0.67 FISH N DPRB WEXIT RIH LIB BHA on S/L & tag impression @ 9018' SLM. 23:45 - 00:00 0.25 FISH N DPRB WEXIT POOH with S/L tools & got hung up @ 9000' SLM (packer btm). Pull several times & pull S/L free. 7n/2003 00:00 - 00:15 0.25 FISH N DPRB WEXIT Continue POOH & overpull @ 8295' SLM. Seems like we're dragging some junk up. RBIH with drag to 9013' (below pkr) to shake off junk. PUH & hang up @ pkr. Pull free & observe no more restriction. 00:15 - 00:45 0.50 FISH N DPRB WEXIT POOH with S/L tools. 00:45 - 01 :00 0.25 FISH N DPRB WEXIT OOH. UD S/L tools. Observe a moon impression of the W/S fishing tip. Seems like after the mill backed off we scooped the W/S fishing tip with the string reamer box & bent it ca. 2" into the 7" liner. Review forward plan with ANC, BOT & HOWCO. Decide to attempt wedging the W/S tip & fish the mill with an overshot. 01 :00 - 03:00 2.00 FISH N DPRB WEXIT W. O. S/Line tools (decentralizer & O/shot). Printed: 71912003 9:02:11 AM Page 4 of 4 Operations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 6/7/1989 Event Name: REENTER+COMPLETE Start: 7/3/2003 End: 7/14/2003 Contractor Name: NORDIC CALISTA Rig Release: 7/8/2003 Rig Name: NORDIC 1 Rig Number: N1 Date From - To Hours Task Code NPT Phase Description of Operations 7rT12003 03:00 - 03:25 0.42 FISH N DPRB WEXIT M/U 3.0" O/shot, XIO, 3.80" centralizer, 2' x 1-3/4" stem, KJ & ac on 0.125" SIlo 03:25 - 04:15 0.83 FISH N DPRB WEXIT RIH O/shot BHA on SIlo Sat down @ 9020' SLM. Tapped down & pulled 700lbs bind. S/O & pulled bind 2x. Jarred down & pulled 2900lbs bind. Pulled free. Tagged btm @ 9019' SLM. Observe up wt gain. 04:15 - 04:45 0.50 FISH N DPRB WEXIT POOH with S/L tools. 04:45 - 05:00 0.25 FISH N DPRB WEXIT OOH. UD S/L tools with no fish. Observe some fresh scratches inside the O/shot lip. 05:00 - 05:15 0.25 FISH N DPRB WEXIT Redress & M/U same O/shot BHA for a retrial. 05:15 - 05:45 0.50 FISH N DPRB WEXIT RIH O/shot BHA on SIlo Sat down @ 9019' SLM & tapped down several times - not getting past bent W/S tip. 05:45 - 06:30 0.75 FISH N DPRB WEXIT POOH with S/L tools. 06:30 - 08:30 2.00 FISH N DPRB WEXIT RIH and swedge top of whipstock to side. POH. 08:30 - 11 :00 2.50 FISH N DPRB WEXIT RIH with 3.0" overshot to fish. Jar down and set overshot. Jar up for 30 min. and pull free. 11:00 -13:00 2.00 FISH N DPRB WEXIT POH. Did not recover fish. Grapple pulled out of inside of 3.0" overshot. Grapple is 2.75" 00 X 3.25" long. It should still be fixed to 2-3/8" Reg. pin up on fish. 13:00 - 14:15 1.25 FISH N DPRB WEXIT RIH with 3.75" LIB to prove top of whipstock is to side. POH. 14:15-16:00 1.75 FISH N DPRB WEXIT 3.75" LIB landed on top of whipstock, did not get on tray down to fish. M/U smaller 2.5" LIB to try and get past top of whipstock 16:00 - 18:00 2.00 FISH N DPRB WEXIT RIH with 2.5" LIB. POH. Still landed on top of whipstock. 18:00 - 18:30 0.50 FISH N DPRB WEXIT RIH with 1.0" Baker spear on 3.80" centralizer and baited sub. Set down @ 9022' SLM. Had slight binds. Tap down to 9023' SLM. Had 800lbs binds. Work for awhile & pull free. 18:30 - 19:00 0.50 FISH N DPRB WEXIT POOH with S/L tools. 19:00 - 20:00 1.00 FISH N DPRB WEXIT OOH. Did not recover fish. 1" 00 x 2" long spiral grapple & nut bull nose pulled out of the spear rod. Review forward plan with ANC, BOT & HOWCO. Decide to made one LIB run to capture the final status downhole, then RID S/L, FP well & RDMO to W-16. 20:00 - 22:00 2.00 FISH N DPRB WEXIT W. O. LIB. 22:00 - 22:30 0.50 FISH N DPRB WEXIT Redress LIB. M/U ac, 3.80" swedge & 3.77" LIB on 0.125" SIlo 22:30 - 23:15 0.75 FISH N DPRB WEXIT RIH LIB BHA on S/L & tag impression. 23:15 - 00:00 0.75 FISH N DPRB WEXIT POOH with S/L tools. Hang up @ 8982' SLM. Worked S/Line & pulled free. Continue POOH. 7/8/2003 00:00 - 00:30 0.50 FISH N DPRB WEXIT OOH. UD S/L tools. Observe an impression of the W/S fishing tip with a blue paint smear (from W/S fishing tip). 00:30 - 01 :00 0.50 FISH N DPRB WEXIT RID S/Line. 01:00-01:15 0.25 RIGD N DPRB WEXIT Held PJSM for UD tools & FP well. 01 :15 - 01 :30 0.25 RIGD N DPRB WEXIT UD BOT tools. 01 :30 - 02:30 1.00 RIGD N DPRB POST M/U & RIH with nozzle BHA to 2000'. 02:30 - 03:15 0.75 RIGD N DPRB POST POOH freeze protecting well with 60/40 MeOH. SI master. 03:15 - 03:30 0.25 RIGD N DPRB POST PJSM for purging CT with N2. 03:30 - 05:00 1.50 RIGD N DPRB POST PlTest N2 unit to 3000psi - OK. Blow down CT with /N2 & bleed off. Meanwhile clean out pits. 05:00 - 05:15 0.25 RIGD N DPRB POST PJSM for N/D BOP. 05:15 - 08:00 2.75 RIGD N DPRB POST N/D BOP. N/U & P/test tree cap. Rig released @ 08:00 7/8/2003. Printed: 7/912003 9.02.11 AM BP Page 1 .. Operations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 617/1989 Event Name: REENTER+COMPLETE Start: 8/18/2004 End: Contractor Name: DOYON Rig Release: Rig Name: DOYON 16 Rig Number: Date From -To Hours Task Code NPT Phase Description of Operations 8/18/2004 08:00 - 15:00 7.00 MOB P PRE Prepare rig for move to Z-23B. Install boosters, lay derrick over. 15:00 - 00:00 9.00 MOB P PRE Move rig off w-pad and down access road. Road conditions required extensive matting. 8/19/2004 00:00 - 00:00 24.00 MOB P PRE Continue move to Z-23B. Move rig to Chevron pad at the intersection of the Spine Road and Z-Pad access road. Wait on Chervron pad while mats are staged on Z-Pad and the access road. Begin moving the rig down Z-Pad access road. 8/20/2004 00:00 - 04:00 4.00 MOB P PRE Continue moving rig to Z-23B 04:00 - 06:00 2.00 MOB P PRE Spot rig on Z-pad. At 0600 rig on Z-Pad and ready to begin mods and repairs. 06:00 - 00:00 18.00 MOB P PRE Perform rig mods and repairs. Repair Dyna-Matic and prepare to change out crown sheaves. Install equalizer line in Pits #1 & #2 8/21/2004 00:00 - 00:00 24.00 MOB P PRE Continue performing rig mods and repairs. Install mud transfer line and equalizer line in Pits #1 & #2. Unstring derrick and change out crown sheave cluster, re-string derrick. Change out boiler. Hold a PJSM prior to all operations. 8/22/2004 00:00 - 03:30 3.50 RIGU P PRE Inspect and raise derrick. 03:30 - 04:30 1.00 RIGU P PRE Spot rig over Z-23, shim and level rig. 04:30 - 09:30 5.00 RIGU P PRE RU floor and cattle chute. Unbridle and hang lines. 09:30 - 17:00 7.50 RIGU P PRE Spot and RU pit and pump modules. Install bridle line pockets in derrick. Welding on mud transfer line in pits. RIG ACCEPTED @ 18:00 18:00 - 18:30 0.50 WHSUR P DECOMP Pre-spud meeting with all rig personnel. 18:30 - 19:00 0.50 WHSUR P DECOMP RU lines to circulate out freeze protect. PU top drive. 19:00 - 19:30 0.50 WHSUR P DECOMP RU little red to pump hot diesel. 19:30 - 20:30 1.00 WHSUR P DECOMP RU DSM and pull BPV through lubricator. RD DSM. 50 psi tbg pressure after pulling BPV. 20:30 - 21 :00 0.50 WHSUR P DECOMP RU vac trucks to pump hot seawater. 21 :00 - 21 :30 0.50 WHSUR P DECOMP PJSM with all rig personnel on pressure testing lines and pumping diesel and seawater. 21 :30 - 22:00 0.50 WHSUR P DECOMP Pressure test all lines to 1000 psi. 22:00 - 22:30 0.50 WHSUR P DECOMP Pump 50 bbls 160 degree diesel. 22:30 - 00:00 1.50 WHSUR P DECOMP Switch to rig pump and displace well with 160 degree seawater. 5 bpm @ 300 psi 8/23/2004 00:00 - 01:00 1.00 WHSUR P DECOMP Continue displacing well with 750 bbls 160 degree seawater,S bpm @ 400 psi. circulated out 190 bbl diesel to slop tank 01:00 - 01 :30 0.50 WHSUR P DECOMP Bleed off well. Flow check - Static. RD and blow down lines. 01 :30 - 02:00 0.50 WHSUR P DECOMP Install TWC and pressure test to 1000 psi from below. 02:00 - 02:30 0.50 WHSUR P DECOMP PJSM with FMC and rig personnel on nipple down tree and adapter flange. 02:30 - 04:00 1.50 WHSUR P DECOMP ND tree and adapter flange. 04:00 - 09:30 5.50 BOPSUF P DECOMP NU BOPE. Install HCR valves. Hook up choke & kill lines to HCR valves. NU riser & flow line. 09:30 - 10:30 1.00 BOPSUF P DECOMP RU test equipment. 10:30 - 16:00 5.50 BOPSUF P DECOMP Test BOPE - 25013500 psi, annular 250/3500 psi. All tests charted and held for 5 minutes. Witness of test waived by Chuck Sheave with AOGCC. Printed: 9/1312004 10:14:51 AM BP Page 2~ Operations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 617/1989 Event Name: REENTER+COMPLETE Start: 8/18/2004 End: Contractor Name: DOYON Rig Release: Rig Name: DOYON 16 Rig Number: Date From - To Hours Task Code NPT Phase Description of Operations , 8/23/2004 10:30 - 16:00 5.50 BOPSUF P DECOMP Upper variable rams would not test, change out with 5' solid rams. 16:00 - 16:30 0.50 BOPSUF P DECOMP Blow down lines and RD BOP test equipment. LD test joint. 16:30 - 17:30 1.00 PULL P DECOMP RU DSM lubricator and pull TWC. RD DSM lubricator. 17:30 - 19:00 1.50 CASE P DECOMP RU to test casing. Pressure up to 200 psi to check for leaks. HCR valve weeping fluid, change out HCR valve 19:00 - 19:30 0.50 CASE P DECOMP Test 9-5/8', 47# casing to 3500 psi for 10 minutes. 19:30 - 20:00 0.50 PULL P DECOMP PJSM with BOT and all rig personnel on spearing tbg and pulling hanger. 20:00 - 21 :00 1.00 PULL P DECOMP MU tbg spear and 1 jt 5' DP. RIH and spear tbg hanger. BOLDS. PU 120k string weight and unseat tbg hanger. Up weight w/ tbg 120k. Pull hanger to floor. 21 :00 - 22:30 1.50 PULL P DECOMP RU circulating head and lines to 4-1/2' tbg. CBU, 10 bpm @ 1000 psi. RU Camco spooling unit to spool control line. 22:30 - 23:00 0.50 PULL P DECOMP Monitor well - static. PJSM on pulling and laying down 4-1/2" tbg. 23:00 - 23:30 0.50 PULL P DECOMP Terminate control lines. Breakout and LD tbg hanger. 23:30 - 00:00 0.50 PULL P DECOMP POH, laying down 4-1/2' tbg, spooling up dual 1/4" control lines with Cameo spooling unit. 8/24/2004 00:00 - 01 :30 1.50 PULL P DECOMP POH, laying down 4-1/2' tbg, spooling up dual 1/4" control lines with Cameo spooling unit. Recovered: 53 - joints 4-1/2' tbg 56 - stainless steel bands 1 - HES "HXO' SSSV assembly 01 :30 - 02:00 0.50 PULL P DECOMP RD Camco spooling unit. LD HES 4-1/2" SSSV assembly. 02:00 - 07:30 5.50 PULL P DECOMP Continue POH laying down 4-1/2' tbg and completion jewelry. Recovered: 131 - joints 4-1/2' tbg 4 - GLM assemblies 1 - 19.31' cut joint of tbg Tubing stub @7390' KB 07:30 - 08:00 0.50 PULL P DECOMP RD 4-1/2" tbg equipment. 08:00 - 09:00 1.00 PULL P DECOMP Clear tools & scrub rig floor. 09:00 - 09:30 0.50 DHB P DECOMP RU Schlumberger e-line unit. PJSM with SWS, HOWCO and all rig personnel on running JB/GR and setting EZSV. 09:30 - 11 :30 2.00 DHB P DECOMP Run Schlumberger junk basket and 8.5' gauge ring, with GRlCCL. Tag up on 7' liner at 7299'. Log up with GRlCCL from 7299' to 6300. POH with wireline 11 :30 - 13:30 2.00 DHB P DECOMP MU Halliburton 9-5/8" EZSV bridge plug on e-line setting tool. RIH with EZSV to , og up and tie in to GR on previous run. Set EZSV 674p. Continue logging up with CCUGR to - - 6600' to conti fS' on depth. RIH and tag up on EZSV @ 6740'. POH with e-line. 13:30 - 14:30 1.00 CASE P DECOMP PJSM with all rig personnel on Pressure testing csg. Close blind rams and test 9-5/8', 47# casing to 3500 psi for 30 minutes. Bleed pressure and RD test equipment. 14:00 - 16:00 2.00 BOPSUF P DECOMP PJSM with all rig person on changing rams and pressure testing BOPE. Change out upper pipe rams to 3-1/2' X 6' variables. Change out HCR valve. Printed: 9/13/2004 10:14:51 AM BP Page 3" Operations Summary Report Legal Well Name: Z-23 Common Well Name: Z-23 Spud Date: 617/1989 Event Name: REENTER+COMPLETE Start: 8/18/2004 End: Contractor Name: DOYON Rig Release: Rig Name: DOYON 16 Rig Number: Date From - To Hours Ta.sk Code NPT Phase Description of Operations 8/24/2004 16:00 - 16:30 0.50 BOPSUF P DECOMP Pull wear bushing and RIH with test plug. 16:30 - 17:30 1.00 BOPSUF P DECOMP RU test equipment. Test HCR valve and upper and lower variable pipe rams to 250 psi I 3500 psi. RD test equipment. 17:30 - 18:00 0.50 BOPSUFP DECOMP Pull test plug and install wear bushing. 18:00 - 18:30 0.50 STWHIP P DECOMP PJSM with all rig personnel on picking up DP from pipe shed. 18:30 - 00:00 5.50 STWHIP P DECOMP PU 5" DP from pipe shed. At midnight 150 jts picked up 8/25/2004 00:00 - 03:00 3.00 STWHIP P DECOMP Continue PU 216 jts of 5" DP from pipe shed. 03:00 - 04:30 1.50 STWHIP P DECOMP Cut and slip 70' of drill line. Service top drive and crown. Calibrate block height for MWD 04:30 - 09:00 4.50 STWHIP P DECOMP POH racking 5" DP back in derrick. 09:00 - 12:00 3.00 STWHIP P DECOMP RIH with 9 6-1/4" DC's and 18 jts of 5" HWDP. 12:00 - 12:30 0.50 STWHIP P DECOMP POH with DC's and HWDP racking stands back in derrick. 12:30 - 16:00 3.50 STWHIP P WEXIT PU whipstock assembly and RIH. Shallow test MWD, 16:00 - 19:30 3.50 STWHIP P WEXIT RIH with whipstock assembly. Fill pipe at 2814' and 4695' 19:30 - 20:00 0.50 STWHIP P WEXIT Orient whipstock 47L. P/U 204K Ibs S/O 200k Ibs 20:00 - 20:30 0.50 STWHIP P WEXIT RIH and set whipstock anchor with 25 klbs. PU to 21 Ok and verify anchor set. Slack off and shear lug with 45 klbs. TOW will be @ 6718' 20:30 - 21 :30 1.00 STWHIP P WEXIT Empty seawater from pits and fill with 10.6 ppg LSND mud. 21 :30 - 22:00 0.50 STWHIP P WEXIT PJSM with BOT, VECO, Peak and all rig personnel on displacing well to LSND mud and milling window. 22:00 - 23:00 1.00 STWHIP P WEXIT Displace well to 10.6 ppg LSND mud. 630 gpm @ 1500 psi 23:00 - 00:00 1.00 STWHIP P WEXIT Mill window from 6718' to 6719'. WOM = 0-2 klbs RPM = 80 Torque on Btm = 7-12k FtLb GPM = 500 @ 1420 psi on Btm, P/U 190k 5/0 190k ROT 192k 8/26/2004 00:00 - 06:30 6.50 STWHIP P WEXIT Continue milling window and from 6719' to 6734'. Drill new hole to 6748' for FIT and to ensure window is full 8.5" gauge. WOM = 10-25 klbs RPM = 110 Torque on Btm = 5-10k FtLb, off Btm = 4k FtLb GPM = 500 @ 1400 psi on Btm P/U 195k S/O 185k ROT 195k TOW - 6718' BOW - 6734' 06:30 - 07:30 1.00 STWHIP P WEXIT Pump and circulate around 20 bbl Super sweep, 11 bpm @ 3300 psi. Total metal cuttings recovered = 280 Ibs Printed: 9/13f2004 10:14:51 AM Page 4~ BP Operations Summary Report Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: Z-23 Z-23 REENTER+COMPLETE DOYON DOYON 16 Date From - To Hours Task Code NPT Phase 8/26/2004 1.50 STWHIP P WEXIT 07:30 - 09:00 09:00 - 09:30 0.50 STWHIP P WEXIT 09:30 - 13:00 3.50 STWHIP P WEXIT 13:00 - 14:00 1.00 STWHIP P WEXIT 14:00 - 14:30 0.50 STWHIP P WEXIT 14:30 - 15:00 0.50 BOPSU P WEXIT 15:00 - 15:30 0.50 STWHIP P WEXIT 15:30 - 17:00 1.50 STWHIP P WEXIT 17:00 - 17:30 0.50 STWHIP P WEXIT 17:30 - 20:00 2.50 STWHIP P WEXIT 20:00 - 22:00 2.00 STWHIP P WEXIT 22:00 - 22:30 0.50 STWHIP P WEXIT 22:30 - 23:00 0.50 STWHIP P WEXIT P INT1 8/27/2004 24.00 DRILL P 00:00 - 00:00 Start: 8/18/2004 Rig Release: Rig Number: Spud Date: 6/7/1989 End: Description of Operations Pull mills above whipstock and perform 11.9 ppg EMW FIT: TMD = 6726' TVD = 6706' MW = 10.5 ppg Surf press = 490 psi Monitor well - Static. Blow down top drive. Slug DP and POH with milling assembly. Monitor well - static. LD Milling BHA. Clean and clear rig floor. MU ported sub and flush BOP stack. PJSM with Anadrill and all rig personnel on picking up and running directional BHA. PU and MU BHA #2, 8-1/2" directional assembly. Shallow test MWD tools. RIH with directional BHA picking up 57 joints of 4' DP from pipe shed. Fill DP and test MWD. Continue RIH with BHA #2 on 5' DP. Break circulation every 35 stands. Orient tool face 45L and RIH with no rotation or pump to 6744'. P/U 180k S/O 180k Stage up pumps to 600 gpm and wash down to 6748' Establish baseline ECD of 11.28 Directional drill 8-1/2" intermediate hole from 6748' to 6795', sliding 100%. WOB = 10-15 klbs RPM Surf= 0, DH = 204 GPM = 560 @ 2050 psi on Btm, 2250 P/U 178k S/0174k ART las hrs = 0.0 hrs AS st 24 hrs = 0.8 hrs .ractional drill 8-1/2" intermediate hole from 6795' to 8384', sliding as required to build angle and azimuth. WOB = 8-11 klbs RPM Surf= 100-140, DH = 265 GPM = 530 @ 2320 psi on Btm, 2100 psi off Btm P/U 215k 5/0 193k ROT 205k Circulate sweeps around, alternating between hi-vis and weighted, as need to clean hole. Backream each stand at full rate, reducing pump rate to -400 gpm on the down stroke. Calculated ECD = 11 .43 ppg Actual ECD = 11.56 ppg Printed: 9/1312004 10: 14:51 AM '~fl¿' I2-C04- bl/c/C/- ~UGA- tJVj ( STATE OF ALASKA ( ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVAL 20 MC 25"280 o Other o Waiver o Time Extension o Annular Disposal o Perforate o Stimulate o Re-Enter Suspended Wel o Operation Shutdown o Plug Perforations o Perforate New Pool epair ull Tubing o Suspend DR Wel OP Type of Request: II Abandon o Alter Casing o Change Approved Program 1 Number 5. Permit To Dri 195-043 / 4. curr~ Well Class: 1m Development D Stratigraphic Test r 2. Operator Name: BP Exploration (Alaska) Inc. D Exploratory D Service 6. API Number: / 50- 029-21950-01-00 Anchorage, Alaska 99519-6612 81.04' 196612, KB Elevation (ft): Address: P.O. Box 3. PBU Z-23A Well Name and Number: 9. 7. 11 - - Total Depth MD (ft) 9580 Casing Structural Conductor Surface Intermedia1 ~I,..tinn Liner / Junk (measured) 9020 QOllapse / Prudhoe Bay Pool Plugs (measured): Whipstock at 9010' Burst - Pool(s): Prudhoe Bay Field P~ESENTWELLCQNDITIONSUMMARY Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth TVD (ft): 9248 9020 8717 Låhåth .,.' '.··,.,,1 TV5 / 10. Field ADL 028262 Property Designation: 8. - 2270 4760 4930 6870 118' 2657' 7369' 118' 2657' 7472' 20" 13-3/8' 9-5/8" 118' 2657' 7472' 81~EqfJV~ 9243' 7212' 9575' 7285' 7' 2290' TubingNãl~e:, '. (í:I~MD (ft) L-80 a 011& 8996' r.n"",,~ Packers and SSSV MD ~ '"'"~«,WD Tubing Size: 4-1/2", 12.6# I Perforation Depth MD (ft) Perforation Depth TVD (ft) 9192' - 9328' 8876' - 9006' Packers and SSSV Type: 7" x 4-1/2" Baker 'S-3' packer; 4-1/2" Otis SSSV Nipple 13. Well Class after proposed work: / D Exploratory 1m Development Attachments: 1m Description Summary of Proposal D Detailed Operations Program 12. o Service / 1m Abandoned D WDSPL D Plugged DWINJ proposed work: DGas DGINJ Well Status after DOil DWAG 15. o BOP Sketch June 28,2004 Date: 14. Estimated Date for Commencing Operations: Contact Jim Smith, 564-5773 ,I Prepared By Name/Number: Phone 564-5521 Date (plio/OI.l Terrie Hubble, 564-4628 ;. ~... ; f:·~~~~~:~~~~~;::~;~:~~ Verbal Approval: Com mission Representative: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Printed Name Bill Isaacson Title Senior Drilling Engineer Signature ~~~;7:i 16. representative may witness Notify Commission so that a Conditions of approval ZsB I i{ ~(..Li2 o Location Clearance ~t-Vï'~iC- t ç f) ~·ll D Mechanical Integrity Test VU'd r Y' é L' £,tA 4{) { /0 o BOP Test {::O r VVL ntegrity Á1) JJrü \J'e d o Plug Other: Approved By: Form 10-403 Re ?nnb B't,' Date RBDMS 8Fl BY ORDER OF THE COMMISSION COMMISSIONER GINA OR bp G June 8, 2004 Date Winton Aubert - AOGCC To: Jim Smith - BPXA GPB Rotary Drilling From P&A for Sidetrack Operations Approval is requested for the proposed P&A of PBU well Z-23A. This well is currently shut-in due to multiple fish in the hole resulting from failed coil tubing drilling sidetrack efforts ( The wellbore is providing no production or value to the field. The proposed work will utilize pre-rig coil tubing to place a cement plug above the existing fish to isolate and abandon the Ivishak formation completion. Additional isolation will come from a bridge plug in 9-5/8" below the new rotary drilled sidetrack and cement between the 9-5/8" ,/ and 7" casings in the liner lap. Z-23B Application for Sundry Approval Subject There has been zero production since the CTD sidetrack efforts. The proposed rotary horizontal sidetrack will target the Zone 4 reserves left behind by the failed coil ¡ sidetrack. Z-23B is planned to place a 1400' MD horizontal sidetrack within Zone 4 below a new 7" drilling / liner. Both liners will be fully cemented in place and pressure tested. The Z-23B sidetrack is currently scheduled for Doyon 16 beginning around July 15, 2004. The pre-rig work for this sidetrack will be scheduled after the Application for Sundry is approved. Scope Pre-Ria Work: S bblÇ. yJ6rr 1. Rig UP%RIH to the top of fish @ -9020' MD. /J 2. Place' cement from the top of fish to about 8775' ~4§; of cement) 3. Chemical cut the 4-1/2", 12.6#, L-80 BTC-M tubih§-<ât -7400' MD. 4. Pressure test tubing and 9-5/8" casing to 3500 psi. ,,/' 5. Fluid pack T X IA with seawater and freeze protect same with diesel. 6. Test the 9-5/8" pack-off to 5000 psi and tubing hanger seals to 5000 psi 7. Function all lock-down screws. Repair or replace as needed. 8. Bleed casing and annulus pressures to zero. 9. Set a BPV in tubing hanger. Secure well. 10. Remove the well house & if necessary level handover form. - 'TM~ 10 ". 4-os Ria ODerations: /' 4\ the on total well prep cost Please provide the pad. vv íJ c,,-- C\.ff L__ Set TWC. liner at 7299'MD MIRU Doyon 16 Pull BPV. Circulate out freeze protection and displace well to seawater. Nipple down tree. Nipple up and test BOPE. Pull TWC. Pull 4-1/2" tubing from above pre-rig cut at about 7400'. RU e-line. Run GR/JB for 9-5/8", 47# casing to just above top of 7' 1. 2. 3. 4. 5. Z-23B Application for Sundry to ( MU 9-5/8", 47# bridge plug on e-line with CCl & GR. RIH and set at 6840' MD, set as needed avoid cutting a casing collar and to place the whipstock window in the Kuparuk formation. Pressure test casing to 3500 psi for 30 minutes. RIH with 9-5/8" Baker bottom trip whipstock assembly. Orient whipstock and set on bridge plug. Swap over to 10.6 ppg lSND drilling and milling fluid. Mill window in 9-5/8" casing at 6819' MD (top of window) plus 20' past middle of window. Perform FIT POOH. MU 8-1/2" drilling assembly with Dir/GR/RES and RIH. Kick off and drill the 8-1/2" intermediate interval, building and turning at 4°/100' to a 34° hold angle and 342° azimuth. Drill ahead to casing point at Top Sag River to an estimated depth of 8926' MD. Run and cement a 7" drilling liner throughout the 8-1/2" hole and back into the 9-5/8" casing with 150' of overlap. Displace cement with mud. POOH. MU 6-1/8" rotary drilling BHA with tricone drillout bit and RIH to the landing collar. Pressure test wellbore to 3500 psi for 30 minutes. Drill shoe track. Swap over to 8.6 ppg mud and drill 20' of new formation. Perform FIT. POOH and pick up 6-1/8" BHA with Dir/GR/RES/PWD and RIH to drill. Drill the 6-1/8" production interval building at 15°/100' to horizontal, targeting Z4 Ivishak. Possible trip for BHA and bit change after landing and turning to 265 deg azimuth. Drill ahead to an estimated TD of 10,792' MD. Run and cement a 4-1/2" l-80 liner throughout the 6-1/8" wellbore and back into the 7" drilling liner to place top of liner with 150' of overlap. Place a perf pill in the liner during cement displacement. Displace well to clean seawater above the liner top. RIH with DPC perf guns. Perf intervals as determined from lWD log. POOH. lD DP and perf guns. Run 4-1/2",12.6#, 13CR completion tying into the 4-1/2" liner top. Set 7" x 4-1/2" packer and test the tubing to 3500 psi and annulus to 3500 psi for 30 minutes. Set and test TWC. ND BOPE. NU and test the tree to 5000 psi. Freeze protect the well to -2200' and secure the wel RDMO 6. 7. 8. 9. 10. 11 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. from 'X' nipple below the new production packer. Work: Install wellhouse and flowlines. MIRU slickline. Pull the ball and rod / RHC plug Install gas lift valves. Post-Ri 1. 2. 3. 6/28/04 7/15/04 Estimated Pre-rig Start Date: Estimated Spud Date: Z-238 Application for Sundry Jim Smith Operations Drilling Engineer 564-5773 S TAN D IN G V A LV E W / C H E C K PRUDHOE BAY UNrr WELL: 2-23B proposed ÆRMrr No: API No: TBD SEC 19, T11 N, R12E, 4560' NSL & 3214' WEL BP Exploration (Alaska) 48 9 Z-23B Proposed 1/ - X nipple at 2200 GLM's at xxx 4-1/2" 12.6# 13CR Baker 9-5/8" x 7" HMC/ZXP hgr/pkr -- TOl at approx 6670'MD /7" 26# l80 BTCm liner 6670' to 8900'MD Baker 7" x 4-1/ pkr at / approx 8700'M r" x 4-12" hgr/pkr )'MD ·1/2" 12.6# l80 IBTm , 111~ / RA tag in heel Pre-rig P&A over fish and tbg cut at 7400'MD Shoe at 10747'MD ngle = 33 - MD= - lVD= - - - 13-3/B" CSG, 6B#, L-BO, 10= 12.415' 9-5/8" whipstock at 6829'MD I 7299' l-i TOP OF BKR TIEBA CK SL V, 10 = E I 7306' 1-l9-5IB" X 7" BKR H Lt\R Tœ 9-5IB" CSG, 47#, L-BO, ID = 8.6B1" l-i 7472' I 1905/8" MILLOUT WINDOW 7472' 07527' I I 8996' I 7" X 4 -1/2" B K R 503 PK R, NO LA TCH ID = 3.938" I TOP OF 2ND WHIPSTOCK 1-0010' FISH 0 2.75" OD x 3.25" LONG SPIRAL 19020'SLMI 1" OD x 2" LONG SPIRA L GRA PPLE 18" BENT WHIPSTOCK FISHING TIP 3.80" HC DP0261 DS MILL 7" LNR, 29#, L-BO, 0.0371 DATE REV BY COMMENTS DATE REV BY COMMENTS 10/18/89 FH ORIGINAL COM PLETION 05/05/95 LINDER SIDETRACK (Z-23A) 07/08/03 DA V IKK ATTEMPTED Z-23AL 1 1 - t SAFEfY N01ES // " ~- Z-23A ì 011S SSSV NIP, 0 = 3.813"1 4-1/2' 2106' t e 4" CW'J FMO BAKER! 91.74'1 55.36'! 3100' 33 @ 7389' 9,197' 8800' SS TREE = W8...LHEAD = A crUA TOR = KB. ELEV = BF. ELEV = ~ Max Ange = Datum MD = Datum TVD = DA.1E o 6iõ'Št9 5 06/08/95 06/08/95 06108/95 GAS LIFT tv\A.NDRELS DEV LA TCH I PORT o RK o RK 16 RK 30 RK ~ w r MD lV D 3109 3017 5104 5110 6588 6483 7275 7111 ST 4 3 2 1 u 2657' 12.415' Minimum ID = 3.813" @ 2106 4-1/2" OTIS SSSV NIPPLE CSG, 68#, L-80, ID = 3-3/8" 1 1 TOP OF BKR l1EBAO< SL V. ID = 6.80' 7299' 1 ! ~ ~ 1 BKR H LNR TOP PKRlHGR, ID = 6.06' ID = 6.06' 7527' I 9-5/8" BKR HMC HGR, 7472' Xl' 1 7306' I 7312' I~ 19-518" MlLLOUT WINOOW ~ ( 7472'~ , 9-5/8" CSG, 47#, L-80, ID = 8.681 [ ] OTIS X NIP, ID = 3.813' BKR S-3 PKR. ID = 3.938' ] 4-1/2' 1 7"X4-112' NO LA TQ-, 8986' 8996' tt:==1 I ~ ~ GRAPPLE OD x 3.25" LONG SARAL LONG SPIRAL GRAPA.E 8" BENT WHIPSTOCK FISHING l1P 3.80" HC DF0261 os MILL RSH - 2.75' 1" ODx 2' "rt19020' S LM 1- ~ l~ 9010' 1--- 9020' 9030' Crop OF2NDWHIPsrOCK / I RA PIPTAG I' EST TOP OF lEG TAL 0= 3.813'J 3" ]-----fi I I 1 OTIS X NIP, OTIS XN NIP, 4-1/2" 4-1/2" 9053' 9064' { { .j ID= 3.8 tjj ID = 3.958" L-80, .0152 bpf, 12.6#, TBG, 4-1/2' r L ID = 3.958' ]-14-1/2" WL EG, l.-~ RA AP TAG I 9073' 9083' 1 { 9073' PffiFORA TION SUMMARY RS= LOG: ATLAS BHCS 04/28/95 ANGLE AT TOP ÆRF: 20 @ 9192 Refer to Production DB for historical perf data SA=' INTffiV A L Opn/Sqz õATË 6' 9192' -9240 Õ õ5'i14i95 STWHIPSTOO< TOP OF STANDING VALVEW/CHECKl JTl lJl" X 20' tv\A. RKffi 8... MD I 48' 9138' - 9039' 91 t 1 :8J,/ L8J .. 09/21/95 09/21/95 09/21/95 09/21/95 o o o o 9256' -9268' 9290' -9294' 9298' -9304' 9311' -9328' 6 6 6 6 I\bte: S IZf1 3~ 3-3/8" 3-3/8" 3-318" 3-3/8" ~. l 9489' PBT 84 PRUDHOE BAY UNIT WELL: Z-23AL1 PffilVUT I\b: 2030830 A A No: 50-029-21950-60 19, T11N, R12E, 4560' NSL & 3214' W8... BP Exploration (Alaska) SEC COMMENTS REV BY DATE ID=6 REV BY COMMENTS FH ORIGINAL COMPLETION LINDER SIDETRACK (Z-23A) DA VIKK ATTEM PTID Z-23AL 1 bpf L-80, 0.037 7" LNR, 29#, DATE 10/18/89 õ5iõši9š õ7iõšiõ3 [ bp ... ,\If.'''. -.....~ ~...- ~-4>.:- ~..-- ..~ ~....... ·'I'~~I\'" ". BP Exploration (Alaska) Inc. 900 East Benson Boulevard P.O. Box 196612 e Hubble Technical Assistant GPB Drilling & Wells Terr Anchorage. Alaska 99519-6612 (907) 561-5111 June 8, 2004 Alaska Oil & Gas Conservation Commission 333 West ih Avenue, Suite 100 Anchorage, Alaska 9950 RECEIVED 203-083 I Permit to Dri Reference ~, Jijæka OJI & Gas Cons. CotnlnhJø;g81 MdDomga ,5 ?n04 JUN Direct: (907) 564-4628 hubbletl@bp.com May Concern: / Please cancel approved Permit to Drill for Z-23AL1, Permit Number 203-083 (50-029-21950-60). Nordic # (Coil Tubing Drilling) moved on this well in July 2003 but encountered mechanical problems prior to exiting ~ the casing. Winton Aubert was contacted by myself on July 9, 2003 and it was determined th}tsince the casing was not exited, no further paperwork would be required until BP had a plan forward. At this time we are submitting an Application for Sundry Approval (10-403) to abandon Z-23A along with a new Permit to Drill for Z-23B. It To\Xlhom Thank you very much for your assistance in this matter. OR\GINA Sincerely, ~~ Terrie Hubble , ~ ) q<t5~ oL/3 MEMORANDUM State of Alaska Alaska Oil and Gas Conservation Commission TO: Julie Heusser, Commissioner DATE: April 21, 2001 THRU: Tom Maunder, ~ "1 ~ P. I. Supervisor ~ f;) ~ - D \ Lou Grimaldi, SUBJECT: Petroleum Inspector SVS Tests BPX Z-pad Prudhoe Bay Field FROM: Saturday. ADril 21. 2001: I witnessed the three-month SVS retests on BPX Z pad in the Western Operating Area of the Prudhoe Bay Field. Merv Liddelow performed the SVS tests today. The test results (one SSV Failure) are noted on the accompanied SVS test spreadsheet. All well houses were in "OK" condition. This was the first experience I have had with the new SV control system on Z pad and found it to operate quite well. The temperatures today were somewhat mild (+15) élnditremainstobeseen how they will hold up during next winter's cold season. Wells Z-5 and Z-8 had slow closing SSV's (+ 2 minutes), Merv called the Automation crew and these were being worked on before I left the pad. The pad is being used as a staging area for some pipeline fabrication and has some equipment and material stored on it. This was kept for the most part neat and orderly. SUMMARY: I witnessed the three-month SVS retests on Z pad in the Prudhoe Bay Field. 20 wells, 40 components, One"'failure, 2,,4% 34 Wellhouse inspections, no problems. Attachments: SVS PBU Z pad 4-21-01 LG.XLS NON-CONFIDENTIAL SVS PBU Z pad 4-21-01 LG ^ .. ' Alaska Oil and Gas Conservation Commission Safety Valve System Test Report Operator: BPX Operator Rep: Merv Liddelow AOGCC Rep: Lou Grimaldi Submitted By: Lou G. Date: Field/UnitIPad: Prudhoe Bay Field, Z pad Separator psi: LPS 159 HPS 21- Apr T~i'~Z!'-73~~Æ~I!~!(~3~_ ;~:'~é.'.,.,..;'~:-¿,? .,'._..',.','.'c '-' \;---3c>-_~__. SSV- SSSV Retest Well Type '." (-C.re: Well Permit Separ Set LIP Test Test Test Date Oil, WAG, GINJ, Number Number PSI PSI Trip Code Code Code PasSed GAS or CYCLE Z-01 1880660 159 125 125 P P Z-02A 1960430 Z-03 1971310 159 125 115 P P Z-04 1891230 Z-05 1900780 159 125 125 P P Z-06 1880320 159 125 125 P P Z-07A 1931100 Z-08A 1931280 159 125 120 P P Z-09 1890850 Z-10 1891160 Z-11 1900720 , 159 125 125 P P Z-12 1891020 Z-13 1900940 159 125 125 P P Z-14A 1980510 Z-15 1880880 Z-16 1920120 159 125 125 P P Z-17 1891390 159 125 125 P P Z-18 1890960 Z-19 1920230 Z-20 1881000 Z-21 1890420 159 125 125 P P Z-22B 1960350 159 125 115 P P Z-23A 1950430 159 125 125 P P Z-24 1890180 159 125 125 P 4 ~\\t D ~ "'-t)\d Å.-\' Z-25 1881590 159 125 125 P P Z-26 1890520 159 125 125 P P Z-27 1900310 159 125 125 P P Z-28· 1881270 Z-29 1890650 159 125 120 P P Z-30 1900230 159 125 120 P P Z-31 1881120 Z-32B 1970340 159 125 125 P P Z-33A 1890050 Z-35 1980930 Z-38 1980600 159 125 120 P P RJF 1/16/01 Page 1 of2 SVS PBU Z pad 4-21-~ b9 ( ~-~'--;-;k-s-Jflê1J1!llitiifn;L- Well Permit Number Number Wells: 20 Remarks: Separ Set PSI PSI Components: LIP Test Trip Code 40 Failures: Z-5 & 8 Long closure times on SSV. ,S$V·SSSV Retest Test Test Date Code Code Passed 1 Failure Rate: Well Type Oil, WAG, GINJ, GAS or CYCLE 2.50% 090 Day RJF 1/16/01 Page 2 of2 SVS PBU Z pad 4-21-01 LG /~. Þ. C) C eel n d 'j \I -¡ d u a -I V,I c -11 (i e oj 0 '3 i c ,3 1 r!¡ ,3 tel'" -i <.3 'j:3 I n \I e ¡'J t 0 ¡'" Y r I Ei .;':.i ~ [¡'Cite: C)3/ 1 ~J/9} '/ ; C PER ì~1 I T D A TAT D A T /I,.,....p L U ~'3 F: U (,I D ¡:.., T E f? E .:: V D _~~~___~~ ~~~~~~____~~___~~ ~ ~_v~_·_~~~~~_~~~~_·~~~~V__~__.~. ~ ,_. ~,~ _..- __. vN _.. 9!:)",OL¡.3 ßHC-AC/GR 1:: 7/+50--9526 O~)/í 2/'D~j 95"~'Oh3 C~)/GR ._L. 8 9 0 O'W 9 it 9 5 o ~~) Ii ? / 9 5 95-0h3 rIFf ¡''''p/,-.n ~.) L.... I 1.....1 I \ ;:) I''''' L 7h50'-955h OS/'j 2/q~;) .. 95w'OLr3 F ì~1 T / G R cL 9 1 9 6 ,- 94 3 5 ()()/ 'j 2,/q~;.; 9~)"'Oh3 ~;SVD/FINAL -L 7 4 5 0 ... 9 5 5 L¡. o ~~) /1 ~: / 9 ~5 I,'", . 1- 95,,·Oh3 , \ to} . ·L 9l00·,·9It53 , . /,.1 ; o ~) /' ;; !1 / 9 ~) ; j' _J_ .,- ~ 9~)~Oh3 E;ßT/GF: FINAL. J~ 8923'-9475 U~')/2!--I/D~;) ¡ ". t,: .~.\ \~ '. ." f' (; 10·L¡.07 R COMPLETION DATE . I , I I . / I ,I ;' .' I D A I L V \.11 ELL 0 P::; '.,' R I / ,',,' / "¡ T ,..., '...) . I /' i/ / I / / ,- / /0.. tn, e d r' y d'j t c h :~; E~ m p 1 e ::s r' e qui r' e d ? V e :3 (n 0 Þ.. n d r' e c e ''1 V e d ? V c: ~:; il C' \hlt3 ~::; t he we 'j ï cor'ed? V e s (n ([) /\ n aí 'Y S -'I s & des c t" 'Î P t 'j .a n ¡" e c e '] v e () ? v ;~~ :;::; 1'1 0 /A r' '.::; we'll t est s r' e qui r' e d ? ! 'y' e s . noR e c e .¡ \I (:~ d ? 'y'ef:; no Well is in compliance Inít'ìa'l C()MMENTS __u··,,·~__'_·_n__u~··_ n·n·~.._·~,,__,_~.~_ STATE OF A~SKA ALASKA OIL AND GAS CONSERVATION COMMISS10N REPORT OF SUNDRY WELL OPERATIONS 1. Operations performed: Operation shutdown _ Stimulate _ Plugging_ Pull tubing _ Alter casing _ Repair well _ 5. Type of Well: Development ..L Exploratory _ Stratigraphic _ Service _ 2. Name of Operator BP Exploration (Alaska) Inc. 3. Address P. O. Box 196612, Anchorage, Alaska 99519-6612 4. Location of well at surface 4560' NSL, 3214 WEL, SEC. 19, T11N, R12E At top of productive interval 517' NSL, 3279' WEL, SEC. 18, T11N, R12E At effective depth 4677' NSL, 3297' WEL, SEC. 18, T11N, R12E At total depth 624' NSL, 3313' WEL, SEC. 18, T11N, R12E 12. Present well condition summary Total depth: measured true vertical O rj ¡,^\ , \ r· ¡ f,' f /r'i L ' I ¡ t '\ ! =, , ¡ \. I LJ. ~", ¡ ¡ ¡ \j n Plugs (measured) 9575' feet 9243' feet 9489' feet 9160' feet Junk (measured) Effective depth: measured true vertical Perforate-X.... Other -X.... 6. Datum elevation (DF or KB) KB= feet 7. Unit or Property name Prudhoe Bay Unit 8. Well number Z-23A (31-18-11-12) 9. Permit number/approval number 95-43 / 10. API number 50- 029-21950-01 11. Field/Pool Prudhoe Oil Pool Size Cemented Measured depth 20" 154' 13-3/8" 3684 Cu. Ft. Permafrost 2657' 9-5/8" 1894 Cu. Ft. Class "G" 7472 True vertical depth BKB 154' 2484' 7380' Casing Structural Conductor Surface Intermediate Production Liner Perforation depth: Length 118' 2621' 7436' 4995' 7" 372 Cu. Ft. Class "G" 7285'-9575' measured 9192'-9240', 9256'-9268', 9290'-9294~ 9298'-9304~ 9311 '-9328' 7223'-9254' true vertical subsea 8876'-8921', 8937'-8948', 8969'-8973', 8977'-8983~ 8989'-9006' Tubing (size, grade, and measured depth) 4-1/2" to 9043' Packers and SSSV (type and measured depth) Packer @ 8996' SSSV @ 2106' 13. Stimulation or cement squeeze summary See Attachment Intervals treated (measured) Treatment description including volumes used and final pressure RECEIVED MÞ,R 2 7 1995 Alaska Oil :1 Gas Cons. CcmmisG n Anchorage 14. Representative Daily Average Production or Iniection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing Pressure Prior to well operation Subsequent to operation 3914 3541 222 264 1615 1397 16. Status of well classification as: Oil X Gas Suspended corf.8ct to the best of my knowledge. Title Technical Assistant 11/ 1430 1490 245 247 Service Date 3~ [/10 SUBMIT IN DUPLICATE Y ------S ~=- WELL Z-23A(31-18-11-12) Hydraulic Fracture Operation 6/04/95 Performed a Hydraulic Data Fracture(Ivishak) using the following fluids: Summary _ 08:00 MIRV frac, vac, pump. AMBIENT=(30), WIND=zero MPH. SIWHP= 1400, lAP= 400, OAP= 200. Master valve would not hold. Greased valve no good. Closed SSV and held. Shortened stroke on tree saver. Complete RV. 11 :00 Prime up, problem with pumps, press test to 7000psig. Hold safety meeting. Call Anchorage Engineer. 12:15 Pump Injectivity test and data Frac 15:46 PUMP FRAC AS PER REVISED TSO 16:20 SECURE WELL. SIWHP= Zero. IAP= 500. OAP= 200. RDMO frac, vac, pump. FLUIDS PUMPED DOWNHOLE INJ TEST: 35~ Bbls DATA FRAC: 503 Bbls FRAC: 712 Bbls 2 1573 TOTAL FLillDS PUMPED DOWN HOLE LOAD VOLUME 1 0 Diesel to IA 1 0 Total Diesel FLUID ADDITIVES BJ SPECTRA FRAC G4000 FLUID SYSTEM with 15 PPT silica flour and 40 PPG adomite regain in pad. No ESL _ Addperf 9/21/95 The following additional interval were perforated uSIng 3 3/8" guns, 6 SPF, random orientation and 60° phasing. 9311 - 9328 MD' 9298 - 9304 MD' 9290 - 9294 MD' 9256 - 9268 MD' RECE\VEO r·' f,D f) 7 1')OS \\n.~.;\ L JJ ~ ~ tj'"'¡"'''''!f' ~\O~l 0·, 0 G'.1C C()~S. \.;\~IIJiII'.) A\" l<a II IY. 1."~ us, r, ,..,r·ll1"', rCoG8 r.\ 'Loll \..I ~..... r~, hared ~elVlces ri II i n 9 BP Exploration / Arco To: Alaska Oil & Gas Conservation Commission Date: December 20, 1995 From: Terrie Hubble Technical Assistant Subject: Revised 10-407 for Z-23A, Permit #95-43 Enclosed, in duplicate, are revised copies of the above listed Well Completion Report and Log. They have been updated to reflect the correct bottom hole location and well total depth. The well histories, directional surveys and logs have previously been filed with the Commission and there are no changes. /tlh RE.Ct:.\\lE.O J~~ 04 ~6 , >"f\" '57X~ fI !": Cons, COf.'II'" ~\ t). G;J:J ,..\n<:,\l~",,:, - ...,,..t"OCJ ~\.i.\tl'. þ:iC~i·..,) ......;,¡ STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION ~"ELL COMPLETION OR RECOMP LETION REPORT AND LOG 1. Status of Well Classification of Service Well OIL ŒI GAS 0 SUSPENDED 0 ABANDONED 0 SERVICE 0 2. Name of Operator 7. Permit Number BP Exploration 95-43 3. Address 8. API Number P. O. Box 196612, Anchoraqe, Alaska 99519-6612 50- 029-21950-01 4. Location of well at surface 9. Unit or Lease Name 4560' NSL, 3214' WEL, SEC. 19, T11N, R12E " ....': _r=JIONS Prudhoe Bay Unit At Top Producing Interval IS fi4Iqr-,~~ 10. Well Number 517' NSL, 3279' WEL, SEC. 18, T11N, R12E Z-23A ~2tj~ ._.; '~::':~i 11. Field and Pool At Total Depth Prudhoe Bay Field/Prudhoe Bay Pool 625' NSL, 3309' WEL, SEC. 18, T11N, R12E .. 5. Elevation in feet (indicate KB, OF, etc.) 16. Lease Designation and Serial No. RKB = 81' ADL 028262 12. Date Spudded 13. Date T.D. Reached 14. Date Camp., Susp. or Aband. 15. Water Depth, if offshore 116. No. of Completions 04/21/95 04/28/95 05/14/95 N/A feet MSL One 17. Total Depth (MD+TVD) 18. Plug Back Depth (MD+TVD) 19. Directional Survey 120. Depth where SSSV set 21. Thickness of Permafros t 9580' MD /9248' TVD 9489' MD /9160' TVD YESŒJ 1\00 2106'feet MD 1900' (Approx.) 22. Type Electric or Other Logs Run OIL, BHC, CNL, GR 23. CASING, LINER AND CEMENTING RECORD SETTING DEPTH MD CASING SIZE Wf. PER FT. GRADE TOP BOTTOfv1 HOLE SIZE CEMENTING RECORD AMOUNT PULLED 20" Conductor Surface 118' 13-3/8" 68# L-80 Surface 2657' 17-1/2" 3684 Cu. Ft. Permafrost 9-5/8" 47# NT80S Surface 7472' 12-1/4" 1894 Cu. Ft. Class 'G' 7" 29# NT80S 7285' 9575' 8-1/2" 372 Cu. Ft. Class 'G' 24. Perforations open to Production (MD+ TVD of Top and Bottom and 25. TUBING RECORD interval, size and number) SIZE DEPTH SET (MD) PACKER SET (MD) Gun Diameter: 3-3/8", 6 spf 4-1/2" 9043' 8996' MD TVD 26. ACID, FRACTURE, CEMENT SQUEEZE, ErC. 9192'- 9240' 8876' - 8921' DEPTH INTERVAL (MD) AMOUNT & KIND OF MATERIAL USED 9256' - 9268' 8937' - 8948' Freeze Protected w/142 bbl Diesel 9290' - 9294' 8969' - 8973' 9298' - 9304' 8977' - 8983' 9311' - 9328' 8989' - 9006' 27. PRODUCTION TEST .- Date First Production Method of Operation (Flowing, gas lift, etc.) W May 14, 1995 Gas Lift ~ II ~ Date of Test Hours Tested PRODUcnONFOR OIL-BBL GAS-MCF WATER-BBL CHOKE SIZE GAS-OIL RATIO "> :í! TEST PERIOD . ..,-- -"- Flow Tubing Casing Pressure CALCULATED OIL-BBL GAS-MCF WATER-BBL OIL GRAVITY-API (carr) ,~.u .... 24-HOUR RATE. 0 Press. :' '\ 28. CORE DATA "--'- ~ . . . Brief description of lithology, porosity, fractures, apparent dips, and presence of oil, gas or water. Submit core chips. I J...I - ~ -:> c: o <ñ (/) E ~ u .(1) ~rn oE (.)0 (f.IU Æ~ o/'S ã ~ ~ ';f Form 10-407 Rev. 7-1-80 CONTINUED ON REVERSE SIDE Submit in duplicate 30. I FORMATION TESTS GEOLOGIC MARKERS NAME MEAS. DEPTH TRUE VERT. DEPTH Sag River 9004' 8702' Shublik 9036' 8732' Zone 4 9191' 8875' Include interval tested, pressure data, all fluids recovered and gravity, GOR, and time of each phase. 31. LIST OF ATTACHMENTS 32. I hereby certify that the foregoing is true and correct to the best of my knowledge Signed Title Senior Drillim; Enr;ineer Date I Z. - 7-7 - 9 .> 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. Item 1: Classification of Service Wells: Gas injection, water injection, steam injection, air injection, salt water disposal, water supply for injection, observation, injection for in-situ combustion. Item 5: Indicate which elevation is used as reference (where not otherwise shown) for depth measurements given in other spaces on this form and in any attachments. Item 16 and 24 : If this well is completed for separate production from more than one interval (multiple completion), so state in item 16, and in item 24 show the producing intervals for only the interval reported in item 27. Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval. Item 21: Indicate whether from ground level (GL) or other elevation (DF, KB, etc.). Item 23: Attached supplemental records for this well should show the details of any multiple stage cement- ing and the location of the cementing tool. / ~ Item 27: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water In>",,'" jection, Gas Injection, Shut-in, Other-explain....J~ Eo ,~ Item 28: If no cores taken, indicate "none". >V'·i·,jV .~,,:~~ .i~"'~ ~ ~ <::J~ " ~ ~. \~ ~"~~ç,~~,~,¿..~~ Form 1 0-407 .- r-::}- '{Þ-....'\ rlAI SHARED SERVICE DAILY OPERATIONS PAGE: 1 WELL: BOROUGH: UNIT: FIELD: LEASE: API: PERMIT: APPROVAL: Z-23A NORTH SLOPE PRUDHOE BAY PRUDHOE BAY ACCEPT: 04/17/95 11:59 SPUD: RELEASE: OPERATION: DRLG RIG: DOYON 16 WO/C RIG: DOYON 16 50- 04/18/95 TD: 98 0 9 PB: 9519 04/19/95 TD: 98 0 9 PB: 9519 1) INSTALL TWC MW: 0.0 MOVE RIG NEAR CAMP. CHANGE OUT #2 MOTOR DUE T/MECHANACAL PROBLEMS. INSTALL NEW HARRISBURG SHALE SHAKER. THE NEW SHAKER SHOULD HANDLE 50% MORE CUTTINGS. RU MOVING SYSTEM & FRONT BEAMS. LAY HERCULITE & MATS ON WELL Z-23A AND CHANGE THE PUMP. LINERS T/7" SPOT RIG OVER THE WELL. LEVEL UP & SHIM. TAKE ON BRINE WATER IN THE PITS. ACCEPT THE RIG ON 4/17 @ MIDNIGHT. SPOT TIGER TANKS & SLOP TANK. SPOT ANADRILL UNIT. RU LUBRICATOR & PULL THE BPV. RD LUB. CIRC OUT DIESEL FREEZE PROTECTION F/TBG & ANNULS. PUMP FULL CIRC. MONITOR WELL & INSTALL THE TWC. 2) PREPARE T/TEST RAMS MW: 0.0 CREW CHANGE. SERVICE THE RIG. HELD SFTY MTG. NU/ND TREE & BOPE. TEST TWC T/350 PSI. ND TREE. NU BOPE. MU 3.5" TDS LNDG JT INTO HNGR. TEST BOPE 250/5000PSI. ANNULAR T/250/250'0 PSI. RU LUB. PULL TWC TEST WINESSED BY JOHN SPAULDING W/AOGCC. PU LNDG JT. MU INTO HNGR. BOLDS & UNSEAT THE HNGR. CBU. NO GAS. LOSING APPROX 44 BPH. SPOT 20 BBLS LCM PILL ON BOTTOM. RU & LD 3.5" COMPo STRING. LD SSSV. RECOVERED 31 PROTECTORS & 4 SS BANDS ON CL. TBG LOOKS GOOD. LOSING 10 T/12 BPH. BRINEWATER T/HOLE. CLEAR FLOOR & LD CASG TOOLS. PU 5" TEST JT & TEST PLUG T/TEST LOWER RAMS. ~" i ~ µ- ~ ) " i- i v L ,," OCT '\ 9 \99 5 ~ Qi\ & Gas Cons. Commission ._~,-, ~chorage ...JL z-23A JPERATION: RIG DOYON 16 PAGE: 2 04/20/95 TD: 9809 PB: 8696 04/21/95 TD: 9 8 0 9 PB: 8696 3) 4) CHANGING OUT TBG SPOOL MW: 0.0 COMPLETE CHANGING OUT THE BTTM RAMS T/4-1/2" X 7" RAMS. TESTED RAMS T/250/5000 PSI. RAN WEAR BUSHING. PU 9-5/8" EZSV. MU T/RUNNING TOOL. RIH ON 50 STNDS 5" DP F/DERRICK. CON'T. RIH PU 5" DP T/TOF @ 8705 (DPM). MU CIRC HD, LINES. PU T/8696. SET EZSV @8696. STING INTO RETAINER, EST. INJ RATE OF 3 BPM @ 600 PSI W/9.2 PPG BRINE. UN STING. BATCH MIX CMT. HELD SFTY OPS MTG. PUMPED 5 BBLS FW. TEST LINES T/4000 PSI. PUMP 5 BBLS FW. PUMPED 20 BBLS (100 SX) OF 15.8 PPG G CMT SLURRY W/ADDITIVES. PUMP 5 BBLS FW. SPOTTED SLURRY T/200' ABOVE STINGER W/RIG PUMPS. STING IN. SQUEEZ OFF EXISTING PERFS. ISP 620 PSI @ 3BPM. FSP 2900 PSI @1.4 BPM. UNSTING. (ALL CMT PUMPED IS BELOW THE RETAINER) POOH 2 STNDS DP. REV. CIRC STRING CLEAN. TEST CASG T/3500 PSI F/30 MIN. OK. HAD 20 PSI BLEED OFF OVER TEST PERIOD. RD HD LINES. MU 9-5/8" STORM PKR. RIH T/28' RT. SET STORM PKR. TEST T/500 PSI. PULLED WEAR BUSHING. MU PACKOFF PULLING, RUNNING TOOL. CHANGED OUT PACKOFF. TEST PACKOFF. COULDN'T GET TEST ON PACK-OFF. WOULD NOT HOLD PRESS. ND BOP@ TOP OF TBG SPOOL. PULL PACKOFF. INSPECT POLISHED STUB, TBG HD. NO VISUAL PROBLEM APPARENT. RESET PACK-OFF. WOULD NOT TEST.' FLµID PUMPING OUT AROUND 1/3 OF THE CIRCUMFERENCE @ THE TOP. PULLED PACKOFF. CHANGED OUT TBG SPOOL. CUTTING WINDOW MW: 0.0 COMPLETED CHANGING OUT THE TBG SPOOL. INSTALLED MODIFIED PACK-OFF. TESTED PACKOFF T/5000PSI. OK. NU BOPE. TESTED BODY T/5000. OK. RETRIEVED STORM PACKER, STRING & LD STORM PCKR. POOH W/EZSV RUNNING TOOL. LD. PU SERIES 7200 SECTION MILL ASSY. MU BHA. RIH T/TOP EZSV @ 8696. DISPLACED HOLE OVER T/9.9 PPG MILLING FLUID. SPOTTED 80 BBLS OF 18 PPG HI VIS PILL ON BTTM. POOH LD DP T/APPROX WINDOW DEPTH @ 7462. BROKE CIRC @ PLANNED MILLING RATE. CHANGED OUT SHAKER SCREENS T/HANDLE REQ'D FLOW RATE. LOCATED CASG COLLAR @7467 (DPM). LOWERED SECTION MILL T/7472. INITIATED WINDOW CUT @ 7472. CUT T/7486. GOOD METAL RECOVERY @ SHAKER. .....-L Z-23A JPERATION: RIG DOYON 16 PAGE: 3 04/22/95 TD : 980 9 PB: 8696 5) 04/23/95 TD: 98 0 9 PB: 8696 6) CUTTING WINDOW MW: 0.0 MILLED THE SECTION F/7486 T/7489. JETTED FLOWLINE. PLUGGED. DISMANTLED, UNPLUGGED THE FLOW LINE OF METAL CUTTINGS. MILLED SECTION F/7489 T/KELLY DOWN @ 7501. JETTED FLOW LINE @5' INTERVALS. PU & WORK MILL INTO CASING @ THE TOP OF THE WINDOW. SUSPECTED BLADES JAMMED OPEN. CBU T/CLEAN HOLE. CLEAN LINES, SURFACE EQUIP. MADE CONNECTION. BROKE CIRC. COULD NOT GET THE BLADES ON THE MILL T/OPEN. WORKED STRING/MILL-BLADES WOULDN'T OPEN. POOH T/INSPECT THE SECTION MILL. FOUND THE BLADES WERE BENT, JAMMED INTO BODY W/METAL UNDER BLADES. LD SECTION MILL. MU NEW SERIES 7200S SECTION MILL. (3BLADES) MU BRA & RIH T/5000. SLIP & CUT DL. RIH W/MILL T/BTTM OF WINDOW SECTION @7501' CONTINUED MILLING SECTION F/7501 T/7523'. CBU. JETTED FLOW LINE @5' INTERVALS. GOOD METAL RETURNS. TOTAL WINDOW CUT = 51' . PU K/O BRA MW: 0.0 MILLED SECTION F/7523 T/TD OF WINDOW @7527. TOTAL WINDOW CUT = 55' GOOD METAL RECOVERY THROUGHOUT THE OPERATION. CBU. WORKED MILL THRU WINDOW SECTION. PU INTO CASING. DROPPED BALL. CBU THRU TOP SUB. CLEANED SURFACE LINES, EQUIP. POOH W/SECTION MILL. BLADES ARE 40% WORN. LD MILL. ~U MULE SHOE SUB. MU T/5" DP. RIH T/7627, 100' BELOW THE WINDOW, CIRC T/CONDITION MUD & HOLE F/CMT. CIRC @ REDUCED RATE DUE T/HEAD GASKET FAILURE ON BATCH TRUCK. BATCH MIXED CMT, HELD SFTY & OPT. MTG. RIGGED IN BJ. TESTED LINES T/2500 PSI. SET 200 SX OF 17 PPG G BALANCED CMT PLUG F/7627 T/7272. BROKE OUT LINES. POOH 5 STNDS OF DP T/7157. REV. CIRC HOLE CLEAN. SLIGHT CMT CONTAMINATED MUD ON BU ONLY. HESITATED SQUEEZED WINDOW. FSP 2000PSI. BLED OFF T/1850 PSI IN 30 MIN. SQUEEZED AWAY TOTAL OF 1 BBL CMT. POOH W/MULE SHOE SUB. LD 39 JTS OF EXCESS 5" DP. OLD MS SUB. MU MIX SUB T/KELLY. FLUSH STACK THROUGHLY. SET TEST PLUG. OPENED DOOR T/CHECK F/METAL. NONE. CHANGED OUT LINERS T/6.5" WHILE FLUSHING. CHECKED STACK. BODY TESTED BOP STACK T/5000. LD TEST PLUG. PU K/O BRA. ......L Z-23A JPERATION: RIG DOYON 16 PAGE: 4 04/24/95 ( 7) TD: 7 514' ( 0 ) 04/25/95 ( 8) TD: 7 8 64' ( 3 5 0 ) 04/26/95 ( 9) TD: 8759' ( 895) 04/27/95 ( 10) TD : 8 9 7 4' ( 215 ) 04/28/95 ( 11) TD : 952 8' ( 554 ) KO PLUG @7514 MW: O. 0 VI S : 0 PU 8.5" DS40HF REBUILT PDC BIT. MU DIRECTIONAL BHA W/6.75" SMM (1.5 DEGREE BH). MWD. SURFACE TESTED SMM, MWD. INSTALLED KELLY SPINNER. FUNCTION TESTED KELLY SPINNER, SPINNERS ARE NOT OPERATING PROPERLY. REPAIRS ARE NECESSARY T/CONTROLS. HYDRAULIC OIL IS ENTERING THE AIR STREAM. GENERAL RIG MAINTENANCE. RIH W/DIRECTIONAL ASSY T/7105. MU KELLY. WASHED DOWN F/7105 T/7336. SURFACE CMT SAMPLES WERE HARD. DRILLED & CLEANED OUT FIRM CMT F/7336 T/7460. CIRC HOLE CLEAN. CLEANED OUT THE CMT F/7460 T/THE TOP OF WINDOW @7472. ORIENTED & TIME DRILLED (SMM) 8.5" HOLE F/7472 T/7514. DRILLING MW: O. 0 VI S : 0 ORIENT & TIME DRILL (SMM) 8.5" HOLE F/7514 T/7516. PU INTO CASG. CBU. HELD SFTY MTG. EMPTIED & CLEANED THE MUD PITS. FILLED THE PITS W/ST FLUID. ORIENTED, SURVEYED & DRILLED 8.5" HOLE F/7516 T/7864. DRILLING MW: O. 0 VI S : 0 ORIENT, DRILL & SURVEY 8.5" HOLE F/7864 T/8451. CBU. POOH ON SHORT TRIP T/SHOE @7472. HOLE OK. RIH T/8421. MU KELLY. WASH DOWN F/8421 T/BTTM @ 8451. HOLE OK. ORIENTED, DRILLED & SURVEYED F/8451 T/8759. RIH W/DIRECT. BRA MW: O. 0 VI S : 0 ORIENTED, DRILLED, SURVEYED 8.5" HOLE F/8759 T/8974. ROP IS ERRATIC. PUMP PRESS. WOB INCREASED T/DRILL. CBU. POOH F/BIT & BRA CHANGE. LD BIT, SMM, MWD. FINAL BIT DATA= 19.4 HRS, AST = 20.4 HRS. PULLED WEAR BUSHING. SET TEST PLUG. TESTED BOPE T/250/5000PSI. ANNULAR T/250/2500PSI. CHANGE OUT WEAR PLATES ON TOP PR & CHANGE SHEAR RAMS T/BLIND RAMS. TEST WITNESS WAS WAIVED BY AOGCC REP BOBBY FOSTER. PU NEW BIT. MU 40' PENDULUM DIRECTIONAL BHA. RIH W/DIRECTIONAL BHA. DRILLING MW: O. 0 VI S : 0 RIH W/CONVENTIONAL DIRECTIONAL BHA T/892~. MU KELLY. WASH DOWN F/8924 T/BTTM @ 8974. PRECAUTIONARY ONLY. HOLE IS IN GOOD CONDITION. DRILLED 8.5" DIR. HOLE F/8974 T/9528. oWL Z-23A 0PERATION: RIG DOYON 16 PAGE: 5 04/29/95 ( 12) TD : 958 0' ( 52 ) 04/30/95 ( 13) TD: 95 8 0' ( 0 ) RD FMT TOOL STRING MW: O. 0 VI S : 0 DRILLED 8.5" HOLE F/9528 T/TD OF WELL @9580 MD, 9210 TVD. BASED ON THE LAST MWD SURVEY. CBU. POOH ON SHORT TRIP T/SHOE @7472. HOLE IN GOOD CONDITION. MONITOR THE WELL -STATIC. RIH T/BTTM @ 9580. HOLE OK. CBU. CIRC T/CONDITION MUD.& HOLE F/LOGS. DRIPPED SS EMS. POOH SURVEY T/SHOE. MONITOR WELL-STATIC. CONTINUE T/POOH T/LOG. RECOVERED EMS TOOLS. EMS SHOWED GOOD CORELATION W/MWD DATA. LD BIT. RU ATLAS WL. RAN DIL/BHC/CNL/GR LOG 9557' (ELM) T/SHOE. LD TOOL STRING. RAN FMT TOOL STRING. TOOK TOTAL OF 20 PRESS STATIONS. LOWEST 9435', HIGHEST 9192'. POOH W/FMT TOOL STRING. CIRC T/CMT 7" LINER MW: O. 0 VI S : 0 COMPLETED LD FMT TOOL STRING. RD ATLAS WL. CLEANED FLOOR AREA. HELD SFTY MTG. PU 8.5" HOLE OPENER. MU BHA. RIH T/SHOE @7472. SLIP & CUT DL. CONT. RIH W/HOLE OPENERT/9550. STRING TOOK THE WT. WASHED & REAMED F/9550 T/BTTM @9580. CBU. CIRC T/COND MUD & HOLE F/CASG. DROPPED DRIFT. POOH W/8~5" HOLE OPENER. LD HWDP. LD HOLE OPENER. RU T/RUN CASG. HELD SFTY OPS MTG. RAN 7" CASG. RAN TOTAL OF 55 JTS 7" 29 PPF NT80SNSCC CASG. MU BAKER 7" LINER HANGER ASSY. CIRC ONE LINER VOL. RIH 7" LINER ON 5" DP T/9561. STRING TOOK WT. MU SINGLE W/PLUG DROPPING HD. RU LINES. CIRC LINER DOWN F/9561 T/9576. WOULD NOT GO FURTHER. CIRC. RECIP T/CONDITION MUD & HOLE F/CMT. ·.uL Z-23A OPERATION: RIG DOYON 16 t'-~~-, PAGE: 6 05/01/95 ( 14) TD: 958 0 PB: 9489 05/02/95 ( 15) TD: 9580 PB: 9489 05/03/95 ( 16) TD: 958 0 PB: 9489 SIGNATURE: RIH W/CSG SCRAPER MW: 0.0 COMPLETED CIRC T/COND MUD/HOLE F/CMT. WASHED STRING T/TD @9580. RIGGED IN BJ. PUMPED 5 BBLS FW. TESTED LINES T/4500 PSI. PUMPED 15 BBLS FW. 70 BBLS BJ MCS-4 SPACER 11 PPG. 313 SX 15.7 PPG G SLURRY W/35% SILICA FLOUR. FLUSHED THE LINES. DROPPED DP DART W/5 BBLS FW. DISPLACED W/201 BBLS OF MUD. BUMPED PLUG W/2500 PSI. CONT'D T/PRESS UP T/SET TOP OF PKR W/2600 PSI. LINER HNGR W/3200PSI. HAD SUDDEN DECREASE IN PRESS@3050PSI. CHECKED SURFACE EQUIP. OK. SUSPECTED RT SEALS OF DP FAILURE. RELEASED OFF HANGR. HANGER APPEARED T/BE SET. FLOATS HELD. GOOD RETURNS THRU JOB. CIP @8:50 HRS. POOH 10 STNDS DP WET ON TOP SINGLE OF 11TH STD. NOTED SPLIT" IN DP APPROX 47" F/BOX INSLIP AREA. LENGTH OF SPLIT 16". CHANGED OUT. NO FLOW BACK THRU RUNNING STRING NOTED. INDICATES NO CMT @ THE TOP OF LINER. CIRC STRING, HOLE CLEAN. NO CMT ON BU. POOH W/HNGR RUNNING TOOL. LD 60 JTS. OF DP. LD RT. PU 8.5" BIT. MU BHA. RIH T/7074. STAGED IN TO TOP OF LINER @7299. NO INDICATION OF CMT ON TOP OF LINER/CIRC HOLE CLEAN. POOH W/BIT. LD. PU 6" BIT, MU 7" CASG SCRAPER. MU 4.75" 3.5" BHA. RIH T/9420. STRING TOOK THE WT. SHOE @ 9575, LNDG COL @ 9489. TOL @7299. RUN COMP STRING MW: 0.0 TAGGED CMT @9420. DRILLED MED HARD CMT F/9420 T/9489. CIRC HOLE CLEAN. TEST CASG LINER LAP T/3500#. OK. 10 LB/GAL MUD. DISPLACE T/FILTERED SEAWATER. CLEAN PITS. TEST CASING LINER LAP T/3500#. OK. POOH LD DP. BHA. PULL WEAR RING. RU T/RUN 4.5" COMPLETION STRING. RELEASE RIG MW: 0.0 CONTINUE T/RUN 4.5" COMPLETION STRING. PU HXO SLVN & INSTALL CL. TEST T/5000#. OK. RIH W/COMPLETION STRING. PU TBG HNGR, MU CL & TEST T/5000. CIRC SEAWATER W/INHIBITOR--COREXIT. LAND & LOCKDOWN TBG HNGR. INSTALL BPV. ND BOP. NU ADAPTER FLANGE & XMAS TREE. INSTALL 2-WAY CHECK. TEST TREE & CL T/5000. OK. PRESS UP TBG T/4000#. SET PCKER & TEST TBG. OK. BLEED PRESS OFF TBG T/1800. TEST ANNULUS T/3500#. OK. BLEED PRESS OFF TBG & ANNULUS. PRESS ANNULUS T/2900#. SHEAR OUT RP VALVE. PUMP 142 BBLS OF DIESEL, 2000' F/FREEZE PROTECTION. SET BACK PRESSURE VALVE. SECURE WELL. PREPARE T/MOVE. RELEASE RIG @ 5:00 HRS, 5/3/95. DATE: (drilling superintendent) ~, ï a~ i-' .; \: \) OCT '\ 9 1995 A\as\<a u\\ & Gas Cons. Commission . Anchorage ,~ WELL Z-23A Initial Perf 05/14/95 - JOB SUMMARY: Perforated well underbalanced as per programme with 2 runs of 241 EHC guns with 3.3/8" Jumbo Jets Big Hole. Gun #1 - Tight spot seen at approx. 73001 on first run which was believed to be fluid but was not conclusive as it was deeper than the deepest GLM. RIH speed restriction of 150 fpm for 7/32 cable with 3.3/8" guns makes it hard to see fluid level. Assumed worst case fo safety and had to add WHP to reduce underbalance from 2000 down to 1150 psi to avoid risk of getting blown up hole. Gun #2 - Got stuck at 7380· coming out of the hole after firing 241 interval. Suspected debris/ formation sand form well warm up but hole angle is only 29°. Made several attempts to get free. Tried flowing the well but unable to move guns. Built up WHP with gas lift and opened wing to surge well in. Guns were still stuck but came free after increasing a/pull to 1200 lb. Inspected guns at surface. Saw some rub marks on swelled sections but no sand or debris left in holes or on tools. Another possibility is that the tubing could be slightly corkscrewed at around 7300 - 74001 causing the 2nd 241 gun to wedge as the well warmed up as well as the temporary weight reduction seen while RIH gun #1. TO TAG at 94801 ELMO. Add Perfs 9/21/95 The following additional interval were perforated using 3 3/8" guns, 6 SPF, random orientation and 60° phasing. 9311 - 9328 MO' 9298 - 9304 MO' 9290 - 9294 MO' 9256 - 9268 M 0' "' =ì -. .~'" E RRY-SUN DRILLING SERVICES ANCHORAGE ALASKA q< A)~} PAGE 1 SHARED SERVICES DRILLING W.EILEEN/Z-23A 500292195001 NORTH SLOPE BOROUGH COMPUTATION DATE: 6/ 1/95 TRUE SUB-SEA MEASD VERTICAL VERTICAL DEPTH DEPTH DEPTH 7389 7517 7610 7772 7797 7889 7983 8076 8168 8259 8350 8443 8535 8627 8720 8811 8905 8999 9092 9186 9277 9372 9466 9562 7299.00 7407.18 7486.06 7625.82 7646.98 7726.30 7807.85 7888.06 7968.18 8047.85 8127.48 8208.73 8289.83 8370.67 8452.03 8532.35 8614.80 8699.37 8784.99 8872.39 8959.08 9048.96 9139.49 9232.19 7217.96 7326.14 7405.02 7544.78 7565.94 7645.26 7726.81 7807.02 7887.14 7966.81 8046.44 8127.69 8208.79 8289.63 8370.99 8451.31 8533.76 8618.33 8703.95 8791.35 8878.04 8967.92 9058.45 9151.15 COURS INCLN DG MN 33 9 32 9 31 14 30 28 30 16 30 23 30 9 29 47 29 23 29 4 29 14 28 42 28 16 27 57 29 14 28 22 27 25 24 40 22 19 19 44 18 2 16 12 15 18 14 24 DATE OF SURVEY: 042895 ELECTRONIC MULTI-SHOT SURVEY JOB NUMBER: AK-EI-50035 KELLY BUSHING ELEV. = 81.04 FT. OPERATOR: BP EXPLORATION COURSE DLS TOTAL DIRECTION RECTANGULAR COORDINATES VERT. DEGREES DG/100 NORTH/SOU1~ßf~T/WEST SECT. ." , / ì / ,,.,.... 4 3 2 . 0 0 N ;[ ~ 3,: ß ~ :s; 3 4 2 . 0 1 496.62N 178:t~ß/íl' 392.30 542.85N 193.4ÖE, 429.34 624.73N 202. 65E .... 501.63 636.87N 200.57E 513.66 N 21.89 E .00 N 20.67 E .93 N 15.71 E 2.98 N 3.03 W 5.92 N 16.49 W 27.76 N 20.17 W N 20.22 W N 20.20 W N 20.24 W N 20.53 W N 23.01 W N 23.01 W N 22.49 W N 22.09 W N 22.73 W N 22.45 W N 21.67 W N 21.50 W N 20.90 W N 20.19 W N 17.56 W N 15.41 W N 13.12 W N 10.05 W 2.02 .24 .39 .45 .38 1.34 .57 .54 .40 1.42 .97 1.09 2.91 2.54 2.77 2.07 2.06 1.16 1.25 680.90N 725.58N 769.00N 811.70N 853.49N 894.74N 936.15N 976.75N 1016.72N 1057.74N 1098.51N 1138.97N 1177.41N 1212.12N 1243.59N 1271.66N 1298.21N 1322.97N 1347.06N 185.98E 169.54E 153.56E 137.84E 122.31E 105.83E 88.25E 71.22E 54.84E 37.92E 20.95E 4.55E 10.66W 24.14W 35.94W 45.57W 53.45W 59.76W 64.72W THE CALCULATION PROCEDURES ARE BASED ON THE USE OF THREE-DIMENSION MINIMUM CURVATURE METHOD. HORIZONTAL DISPLACEMENT 1348.61 FEET AT NORTH 2 DEG. 45 MIN. WEST AT MD 9562 VERTICAL SECTION RELATIVE TO WELL HEAD VERTICAL SECTION COMPUTED ALONG 337.77 DEG. ~ ï_ ... L- I .¡ L U OCT 'I 9 1995 M I ( R 0 F I L M E D ~- ~~, & ;:b~~::~ Commission nateJ/3/{)/ , , 559.93 607.50 653.75 699.22 743.78 788.19 833.18 877.21 920.41 964.78 1008.94 1052.59 1093.93 1131.16 1164.76 1194.38 1221.94 1247.25 1271.42 -~i-, ."Õ ./"",-, S <RY-SUN DRILLING SERVICES ANCHORAGE ALASKA PAGE 2 SHARED SERVICES DRILLING W.EILEEN/Z-23A 500292195001 NORTH SLOPE BOROUGH COMPUTATION DATE: 6/ 1/95 DATE OF SURVEY: 042895 JOB NUMBER: AK-EI-50035 KELLY BUSHING ELEV. = 81.04 FT. OPERATOR: BP EXPLORATION INTERPOLATED VALUES FOR EVEN 1000 FEET OF MEASURED DEPTH TRUE SUB-SEA TOTAL MEASD VERTICAL VERTICAL RECTANGULAR COORDINATES MD-TVD VERTICAL DEPTH DEPTH DEPTH NORTH/SOUTH EAST/WEST DIFFERENCE CORRECTION 7389 7299.00 7217.96 432.00 N 153.00 E 90.00 8389 8160.91 8079.87 911.97 N 98.52 E 228.09 138.09 9389 9065.26 8984.22 1302.78 N 54.71 W 323.74 95.65 9562 9232.19 9151.15 1347.06 N 64.72 W 329.81 6.08 THE CALCULATION PROCEDURES ARE BASED ON THE USE OF THREE-DIMENSION MINIMUM CURVATURE METHOD. cC~b. .,- S: ~RY -SUN DRILLING SERVICES ANCHORAGE ALASKA SHARED SERVICES DRILLING W.EILEEN/Z-23A 500292195001 NORTH SLOPE BOROUGH COMPUTATION DATE: 6/ 1/95 PAGE 3 DATE OF SURVEY: 042895 JOB NUMBER: AK-EI-50035 KELLY BUSHING ELEV. = 81.04 FT. OPERATOR: BP EXPLORATION INTERPOLATED VALUES FOR EVEN 100 FEET OF SUB-SEA DEPTH TRUE SUB-SEA MEASD VERTICAL VERTICAL DEPTH DEPTH DEPTH 7389 7486 7604 7720 7836 7952 8067 8182 8297 8411 8525 8639 8753 8867 8979 9088 9195 9301 9405 9509 9562 7299.00 7381.04 7481.04 7581.04 7681.04 7781.04 7881.04 7981.04 8081.04 8181.04 8281.04 8381.04 8481.04 8581.04 8681.04 8781.04 8881.04 8981.04 9081.04 9181.04 9232.19 TOTAL RECTANGULAR COORDINATES MD-TVD VERTICAL NORTH/SOUTH EAST/WEST DIFFERENCE CORRECTION 7217.96 7300.00 7400.00 7500.00 7600.00 7700.00 7800.00 7900.00 8000.00 8100.00 8200.00 8300.00 8400.00 8500.00 8600.00 8700.00 8800.00 8900.00 9000.00 9100.00 9151.15 432.00 N 481.23 N 539.92 N 598.44 N 655.92 N 710.96 N 765.23 N 818.50 N 870.77 N 922.19 N 972.38 N 1021.82 N 1072.71 N 1122.67 N 1169.44 N 1210.60 N 1246.51 N 1278.48 N 1307.21 N 1334.05 N 1347.06 N 153.00 E 172.37 E 192.54 E 202.60 E 90.00 105.59 123.29 139.66 15.59 17.70 16.38 194.85 E 174.93 E 154.95 E 135.33 E 115.80 E 155.54 171.41 186.93 201.93 216.44 15.88 15.87 15.52 14.99 14.51 94.18 E 73.03 E 52.77 E 31.64 E 11.03 E 230.95 244.82 258.20 272.38 286.06 14.51 13.87 13.38 14.18 13.68 7.52 W 23.56 W 37.02 W 47.73 W 55.93 W 298.01 307.36 314.47 320.01 324.39 11.95 9.35 7.11 5.55 4.38 62.35 W 64.72 W 328.13 329.81 3.74 1.68 THE CALCULATION PROCEDURES USE A LINEAR INTERPOLATION BETWEEN THE NEAREST 20 FOOT MD (FROM MINIMUM CURVATURE) POINTS '~"- -.---~ PHi~£ HG. 1 *~f~1.***~f.*f.*~(1***f.t.~*~~**~**~*~*~f.~~*t.k****~*~*f.{***~*~~~ HH~Hh HhHHdiJ tt***f.*** H~ADRILL ~~~~*~*~~~ *I******t SCHLU~tERGER *.*t*t~~*~ *t(~f.**** ~~~~~***~~ ***~**f**~*****I***li*f*l~ffll**f**~.~'fJ~f*l~f~}'Þ*.*~J.*. f.HHH HH :IJRVrr PRùGI-;tiK HH~,.it:H* Cù"PAHY ÐP ~XrLORkrlO~ wELt NA~£ Z-23A LOCATION 1 P8U LG~AiIOH , H~3, ALASKA "AGHETIC ÐECLIHHTIOH 2B,~9 GRlü CONVERGt~Cr ANGLE v~OO OAf£: 26-AP~-~3 WELL NUK~Eh V ÃPI . 50v!}t19jO-vl WELL HE~D LUCArION~ LAT(Wf-S) C.OO DEP(E/-W' 0,00 JùB HUMBîR 36117 AZI"UTH FRG~ ROT~R1 TAØLE TO TARGEi IS 337.7¡ TIE 1M POIHT(TIP) I'IEHSUREt DEPTH TRUE Vt~:T ÐEf'TH HlCLIHtiTlON AIl ~UiH LArl!UilEdU-~ì Þ!:hWiliRE (fJ -\I) 738'i .llC 7299.0(; 33d6 21 t .)S· 431.:i) 1~3 t 12 / I . /' '. \ , ,i" .' ) ./ ',.¡ I .&. HO, 2 ~--f', '/''''''', ***~***t*t* ANA~RILt *f.f.*~f*~~~ttt. SURVF.ï CALCULriilOHS **tt}**i****~ CIRCU~AR ARC HE¡HOv**~**¡t.) "EASURED IHTERiJHl. Vr:RiICAL TARGET 3ïAilGH AZ1MUTH Lt1TnUDì~ DEPARiURJ: t J SPL~,~EMH;';' i\t ALI¡'UïH JLj D EÍ''\'H bEP1H 3ECTlOH HICLH, tV· ; [¡·w d';"l. ft ft ft ft deg àeq ft it (f \1~,-: l(¡Ot,: 738'1.QO Q,O n99 ,O(¡ V,O(¡ 33,16 i:l.ß9 431,5(; 15Jd¿ 457 ,¿~~, 1~,~.( v, ti(¡ 7493.22 10~.2 7386.39 4Ü.4ï ~2.8ò 2£.74 484, ;)3 174,iló ~ 14 t ~ð ;, '7 I e ~ '.'.~) J 7647,18 154,0 751ì.H l(ì5,4~ 31. 09 S.vì r .~. :-r··· l'i4.:'S 5'1'4,)'7 lS',(o/ ¿,,17 ;f':!l..,)! 7 6U.72 30,5 7543,47 119.ì2 30186 0.5'1 578"jj 115, i (I ;1(11\1/ 1(; "~¿.. "71% 770~. 95 31., 7570.32 134.68 JO.61 355.47 5Ïf3,',) 194,62 625.0£ 16.14 514;: 7740.03 31,1 ì597,11 14'1,óì 30,lð 3S(ì. Lb 60'7,5.:- liL,b7 6~~.:·;; 1;,54 8. ~;b 7771,91 31,9 762416'1. 1b51n 30.49 ~45,6S' 6~5,3L 11S'I~1 t.5~, 3~ 1,~,. 84 oj': I...\,; 78C317j 31.8 7bj2.04 181,81 ~O.59 342.01 ';40Ið~ 184.61 ~';I~ . iì 1 b. J)? ~137 7835)29 31.5 7679.19 197.~5 30.65 J3Y.Sl ~Só.t·4 ¡is-.55 ¿c·(;.1; 1:· . :~ ¡ .;. .it;, 7926 t 35 9i.1 7ì5i' ,51 244.Le 3ù.iO 339¡l~ ,~'7'1 ! 5ii t . ,.., '"\j ii?~..:.·t L~ d.d 'j . Ji l';¡';¡' L! 8019)75 Ÿ3.4 7837,9& 291,b7 3~. 3(¡ 3%.97 ï431ôl 14¿.. :>2 7~ié;.(·7 1 i . 1 ~; V,l¡l.. 8112.99 n,l ì9í3.63 S3ô,46 2'1 t 91 339,l~ 78ìtSS 121'1';'; n~.p ?,i: ,j. j'1 ~2(ì4)33 YÎtJ 79Ÿ7 .8'1 383,8;5 ts' . ~, L ~~) .3:; ß,3() 1 ('~I 11Jlb~' ~37 17..: - '., ~, j( I II 1 ß295(ð 91,5 BOlì ,36 4,9.2;: 29,86 337.13 ~j¡ 115 1Ò t 71~ ;¡~"'I t··, 6. ~~. l.Ú ...;,.¡ I . .,1) 8391.lZ 95.3 ðl60.24 4ï6ll0 7.9,25 3~ò,84 915.4~ nlJÝ 91ó,7: ~ 1 ~(. (I t t;l: 84eOt 79 39.7 82Jô,S[\ ~1Ý.81 2Ô,Y) 337,9~ '15); 65 ,;j .b~ i~7 Ib~ j.';i \ ,., I) Þ' ,'7 8573,96 93,l 8320,38 SM , 43 28.2~ 33b,41 ',Ïfì .Q, 4:110'5 ,..'.,1: ", 1:15'. ,~ 77., . ¡, '.' Vt.1 .. ðb6b.'8 92,3 840î,12 ~ 0'1 . 1 '7 'ý.ì: 33/.46 í03ß,56 !3,2~ l03c. ,~; 1,5" . . c: i ¡ ,,; 875ï.91 91 .~. 8480,89 654,,8 :!S' , z;: 337,15 H,I~O II,: H .t.~: ¡(15(¡.2.: Ü, ~;7 O.St 8850,30 92.4 3561,89 69ß.72 28.28 337,47 U2!¡jò -,;,31 11'21tl8 :~ 't. ¿-ë, 1.·)3 8912.&4 bï.S 861ì.22 7'i.7,56 tI,LO 33O.Ó 114B, H -1 ì ,'¿'j' 1148 I 1S' 3:) ,;. .1 ~ 1 t 7 4 ***Uf.unu tï!HHHHHHf.H t,., ~,w t:.\J r-, \. ~... OC1 '\ 9 '995 ~ 0\\ & Gas Cons. Commission A\as Anchorage ! -~. gyro/data r~ U r. t. ... 1- I II L - OCT ~'9 1995 A1aSka 011 .& Gas Cons. CQmmission ---'''1. ~ch.ora9.~ : B.P. EXPLORATION " ì J Z PAD, WELL NO. :--Z-23A ., ; , 1/\ l. PRUDHOE BAY FIELD, W.O.A., ALA'SKA A Gyro Multishot Survey in 4.5" tubing I ¡V Survey date: 27 May, 1995 C\ ') Job number: AK0595G266 ÛR\~\~~\.. MICROfiLMED Date~ SR266.DOC , ' gyroLdata Gyrodata Incorporated P.O. Box 79389 Hou~on,Texas77279 713/461-3146 Fax: 713/461-0920 June 6, 1995 Ms. Terrie Hubble B.P. Exploration Prudhoe Bay Drilling Department 900 E. Benson Blvd. Anchorage, AK 99508 ME 12-1 Re: Z Pad Well No. Z-23A Prudhoe Bay Field, W.O.A., Alaska Dear Ms. Hubble, Enclosed please find one (1) original and ten copies (10) of the completed survey of Well #Z-23A We would like to take this opportunity to thank you for using Gyrodata and we look forward to serving you in the future. stk~ Robert J. Shoup Operations Manager RS/ gr Serving the Worldwide Energy Industry with Precision Survey Instrumentation gyro/data CONTENTS JOB NUMBER: AK0595G266 1. DISCUSSION, SURVEY CERTIFICATION SHEET 2. SURVEY DETAILS 3. OUTRUN SURVEY LISTING 4. QUALITY CONTROL 5. EQUIPMENT AND CHRONOLOGICAL REPORT SR266.DOC gyro/data 1. DISCUSSION ~ SURVEY CERTIFICATION SHEET SR266.DOC ! ~ c , gyrojdata DISCUSSION JOB NUMBER: AK0595G266 Tool 080 was run in Z-23A on ATLAS 7/32" Wireline inside 4.5" tubing. It was necessary to run the tool on low frequency because they had approx. 24000' of line and the tool wouln't communicate otherwise. After switching tool to 10 frequency, the survey was run without problems. SR266.DOC gyro/data SURVEY CERTIFICATION SHEET JOB NUMBER: AK0595G266 The data for this survey and the calculations for this survey were obtained and performed by me according to standards and procedures as set forth by Gyrodata Limited, true and correct to the best of my knowledge. TOM STODDARD OPERATIONS ENGINEER The data and calculations for this survey have been checked by me and conform to the standards and procedures as set forth by Gyrodata Limited. This report represents a directional survey of this well based on the original data obtained at the wellsite. Checked by :- TIM ANDERSON t . F L> r, ï. ,., L I v L- TOM STODDARD OPERATIONS ENGINEER OCT 'I 9 1995 Alaska Oil & Gas Cons. Commission Anchorage SR266.DOC gyro/data 2. SURVEY DETAILS SR266.DOC gyro/data CLIENT: RIG: LOCATION: WELL: LATITUDE: LONGITUDE: SURVEY DATE: SURVEY TYPE : DEPTH REFERENCE: MAX. SURVEY DEPTH: SURVEY TIED ONTO: SURVEY INTERVAL: UTM CO-ORDINATES: TARGET DIRECTION: GRID CORRECTION: CALCULATION METHOD: SURVEYOR: SURVEY DETAILS JOB NUMBER: AK0595G266 B.P. EXPLORATION ATLAS ZPAD Z-23A 70.30 N 149.5 W 27-May, 1995 MUL TISHOT IN 4.5" tubing ROTARY TABLE EVELATION 81 asl, 48.0' G.L. 9470 N/A 100' 337.77 MINIMUM CURVATURE STODDARD SR266.DOC g~data 3. OUTRUN SURVEY LISTING \, SR266.DOC Horizontal Coordinates Calculated from Local Horizontal Reference Closure Calculated from Well Head Location Vertical Section Calculated from Well Head Location 337.770 deg ( j P~0posed Well Direction: Azimuth Corrected:: Gyro: Bearings are Relative to True North Sub-sea Correction from Vertical Reference: 81 ft. Survey Latitude: 70.300000 deg. N Calculation Method: MINIMUM CURVATURE Surveyor: TOM STODDARD 12:27:11 Run Date: 27-May-95 Job Number: AK0595G266 Location: Z PAD, PRUDHOE BAY FIELD WELL: Z - 23, 4 1/2" TUBING B.P. EXPLORATION for A G Y rod a taD ire c t ion a 1 Sur v e y A G Y rod a taD ire c t ion a 1 Sur v e y B.P. EXPLORATION WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266 MEASURED I N C L AZIMUTH VERTICAL DEPTH DEPTH feet deg. deg. feet 0.0 0.00 0.00 VERTICAL SECTION feet 0.0 0.0 SUBSEA DEPTH feet -81.0 DOGLEG CLOSURE SEVERITY DIST. AZIMUTH deg./ feet deg. 100 ft. 0.00 0.0 --------------------------------------------------------------- - ASURED DEPTHS REFERENCED TO R.K.B. HEIGHT 81 FEET. 0.0 - 9470.0 FEET; GYRO DATA SURVEY RUN IN 4 1/2" TUBING. --------------------------------------------------------------- 100.0 200.0 300.0 400.0 500.0 600.0 700.0 800.0 900.0 1000.0 ("00.0 \.' '__ ~ 0 0 . 0 1300.0 1400.0 1500.0 1600.0 1700.0 1800.0 1900.0 2000.0 .15 .22 .17 .23 .37 .15 .41 .27 .19 .39 .45 .39 .48 .50 .73 .93 1.32 1.08 1.11 1.17 234.65 259.04 195.54 229.48 218.67 141.82 180.59 129.09 130.05 179.02 165.72 171.06 148.45 101.37 100.25 90.77 83.32 82.75 81.55 88_42 100.0 200.0 300.0 400.0 500.0 -.0 - . 0 -.1 - . 3 -.5 600.0 700.0 800.0 900.0 1000.0 - . 8 -1.2 -1.8 -2.1 -2.6 1100.0 1200.0 1300.0 1400.0 1500.0 -3.3 -4.0 -4.8 -5.4 -6.0 1600.0 1699.9 1799.9 1899.9 1999.9 -6.7 -7.3 -7.8 -8.3 -8.9 19.0 119.0 219.0 319.0 419.0 519.0 619.0 719.0 819.0 919.0 1019.0 1119.0 1219.0 1319.0 1419.0 1519.0 1618.9 1718.9 1818.9 1918.9 .15 .10 .21 .13 .15 _ 1 .4 .7 1.0 1.6 .37 .31 .32 .08 .30 1_9 2_2 2.6 2.7 3.1 .11 .07 .19 .39 .24 3.8 4.5 5.2 5.6 6.0 .23 .42 .25 .04 .15 6.7 7.7 9.0 10.4 12.1 0.0 234.7 244.8 239.7 232.0 229.0 223.3 213.5 203.9 195.9 191.3 187.7 184.5 180.9 174.3 164.5 152.8 139.3 128.1 120.6 115.1 Page 1 H 0 R I Z 0 N TAL COO R DIN ATE S feet 0.00 N .08 S .19 S .36 S .64 S 1.02 S 1.37 S 1.84 S 2.35 S 2.60 S 3.04 S 3.76 S 4.48 S 5.17 S 5.62 S 5.82 S 5_94 S 5.82 S 5.56 S 5.30 S 5.13 S 0.00 E .11 W .40 W .62 W .82 W l.17 W l.29 W l.22 W l.04 W .74 W .61 W .51 W .36 W .08 W .56 E l.62 E 3.06 E 5.01 E 7.09 E 8.98 E 10.96 E 5.52 E 3.27 E .11 E 3.48 W 6.60 W 21.33 E 18.79 E 14.55 E 10.48 E 7.59 E 21.54 E 21.31 E 21.13 E 21.24 E 21.68 E 20.30 E 21.12 E 21.58 E 21.73 E 21.74 E 12.96 E 14.88 E 16.64 E 18.02 E 19.23 E 13.30 N 14.84 N 15.22 N 14.71 N 14.08 N 11.02 S 6.60 S .21 S 6.04 N 10.55 N 10.41 S 11.07 S 11.35 S 11.72 S 12.19 S 6.34 S 7.20 S 8.00 S 8.89 S 9.62 S 4.96 S 4.77 S 4.75 S 5.11 S 5.63 S H 0 R I Z 0 N TAL COO R DIN ATE S feet 2 Page 22.5 12.4 .4 346.7 334.9 117.3 109.3 90.8 60.0 35.8 115.8 117.4 118.2 118.9 119.4 107.3 108.8 110.3 112.2 113.9 111.0 107.8 105.9 105.8 106.3 14.4 15.2 15.2 15.1 15.6 .62 .86 .88 .49 .47 4017.8 4117.8 4217.8 4317.7 4417.6 3518.8 3618.6 3718.3 3818.0 3917.9 3018.8 3118.8 3218.8 3318.8 3418.8 2518.8 2618.8 2718.8 2818.8 2918.8 2018.9 2118.8 2218.8 2318.8 2418.8 DOGLEG CLOSURE SEVERITY DIST. AZIMUTH deg./ feet deg. 100 ft. O;CT 1 9 1995 &a~ (m & Gas Cons. CommisstfJJ1 ----....~ ~chorage 24.0 19.9 14.5 12.1 13.0 2.09 2.43 .56 .82 1.62 SUBSEA DEPTH feet 10.2 12.5 14.0 14.9 15.5 -18.3 -13.2 -5.7 1.6 6.9 -17.8 -18.3 -18.5 -18.9 -19.5 -13.5 -14.7 -15.6 -16.4 -17.1 -9.5 -10.0 -10.7 -11.5 -12.5 VERTICAL SECTION feet 4098.8 4198.8 4298.8 4398.7 4498.6 3599.8 3699.6 3799.3 3899.0 3998.9 3099.8 3199.8 3299.8 3399.8 3499.8 2599.8 2699.8 2799.8 2899.8 2999.8 2099.9 2199.8 2299.8 2399.8 2499.8 319.00 288.59 268.22 255.22 262.96 337.73 326.92 325.94 328.20 325.90 195.69 208.80 217.65 137.91 135.80 139.30 132.62 170.47 170.41 192.45 81.85 86.49 93.20 118.35 108.48 1.69 1.55 2.15 2.02 1.62 1.74 4.12 4.68 3.88 2.26 .60 .19 .20 .37 .37 .76 .60 .51 .52 .33 1.14 1.08 .93 .74 .77 4100.0 4200.0 4300.0 4400.0 4500.0 9( -00.0 ~ ~..."OO.O ~'3800.0 3900.0 4000.0 3100.0 3200.0 3300.0 3400.0 3500.0 2600.0 2700.0 2800.0 2900.0 3000.0 2100.0 '/.200.0 2~ 3 0 0 . 0 2400.0 2500.0 MEASURED I N C L .AZIMUTH VERTICAL DEPTH DEPTH feet deg. deg. feet B.P. EXPLORATION WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266 A G Y rod a taD ire c t ion a 1 Sur ~ /~. Yì.- i .. C '¡-...) 23.9 24.0 24.0 24.3 24.9 .27 .42 .03 .38 .01 21.3 22.3 23.0 23.5 23.8 .41 .17 .37 .01 .24 13.9 15.6 17.3 18.7 20.0 .13 .11 .19 .41 .13 A G Y rod a t a D i r e c t i o n a 1 Sur v e y B.P. EXPLORATION Page 3 WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266 MEASURED I N C L AZIMUTH VERTICAL VERTICAL SUBSEA DOGLEG CLOSURE H 0 R I Z 0 N TAL DEPTH DEPTH SECTION DEPTH SEVERITY DIST. AZIMUTH COO R D I N ATE S feet deg. deg. feet feet feet deg./ feet deg. feet 100 ft. 4600.0 1.35 271.58 4598.6 16.4 4517.6 .35 16.7 326.6 13.94 N 9.18 W 4700.0 1.07 257.81 4698.6 17.0 4617.6 .41 17.8 320.7 13.78 N 11.28 W 7"" 300.0 .93 241.19 4798.6 17.1 4717.6 .32 18.4 315.6 13.19 N 12.90 W 4900.0 .80 231.62 4898.6 16.8 4817.6 .19 18.8 311.1 12.36 N 14.16 W 5000.0 .86 244.05 4998.5 16.6 4917.5 .19 19.3 307.0 11.60 N 15.38 W 5100.0 .76 250.22 5098.5 16.5 5017.5 .13 20.0 303.5 11.04 N 16.69 W 5200.0 .58 247.76 5198.5 16.6 5117.5 .18 20.7 300.9 10.63 N 17.78 W 5300.0 .67 249.45 5298.5 16.6 5217.5 .09 21.4 298.5 10.23 N 18.81 W 5400.0 .75 248.17 5398.5 16.6 5317.5 .08 22.2 296.1 9.78 N 19.96 W 5500.0 .96 225.79 5498.5 16.3 5417.5 .39 23.0 292.9 8.95 N 21.17 W 5600.0 .78 229.82 5598.5 15.8 5517.5 .18 23.7 289.6 7.93 N 22.29 W 5700.0 .86 242.20 5698.5 15.5 5617.5 .19 24.5 286.9 7.14 N 23.48 W 5800.0 .72 250.51 5798.5 15.4 5717.5 .18 25.6 284.9 6.58 N 24.73 W 5900.0 2.85 9.02 5898.4 17.6 5817.4 3.26 26.5 289.5 8.83 N 24.94 W 6000.0 5.24 19.05 5998.2 23.2 5917.2 2.48 27.8 304.1 15.60 N 23.06 W / ' 00.0 7.44 22.77 6097.6 31.2 6016.6 2.24 32.1 323.6 25.89 N 19.06 W '\ \......00.0 9.42 19.55 6196.5 41.9 6115.5 2.04 41.9 340.8 39.58 N 13.81 W 6300.0 11.21 19.93 6294.9 55.2 6213.9 1.79 57.0 352.2 56.43 N 7.76 W 6400.0 12.93 21.54 6392.6 70.5 6311.6 1.76 76.0 359.7 75.98 N .34 W 6500.0 14.70 25.35 6489.7 87.1 6408.7 1.99 98.3 5.4 97.86 N 9.20 E 6600.0 16.19 26.97 6586.1 104.8 6505.1 1.54 123.5 9.8 121.75 N 20.96 E 6700.0 18.08 28.71 6681.7 123.7 6600.7 1.97 151.8 13.2 147.79 N 34.74 E 6800.0 20.61 28.51 6776.0 144.6 6695.0 2.52 184.0 16.0 176.87 N 50.60 E 6900.0 22.83 26.14 6868.9 168.6 6787.9 2.39 220.4 17.8 209.7,5 N 67.54 E 7000.0 25.10 22.17 6960.3 196.7 6879.3 2.79 260.7 18.8 246.81 N 84.10 E A G Y rod a t a D ire c t ion a 1 Sur v e y B.P. EXPLORATION Page 4 WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266 MEASURED I N C L AZIMUTH VERTICAL VERTICAL SUBSEA DOGLEG CLOSURE H 0 R I Z 0 N TAL DEPTH DEPTH SECTION DEPTH SEVERITY DIST. AZIMUTH COO R DIN ATE S feet deg. deg. feet feet feet deg./ feet deg. feet 100 ft. 7100.0 27.35 19.94 7050.0 228.8 6969.0 2.46 304.9 19.1 288.06 N 99.94 E 7200.0 28.87 19.43 7138.2 263.9 7057.2 1.53 352.0 19.2 332.43 N 115.80 E 7300.0 31.38 20.14 7224.7 301.2 7143.7 2.54 402.2 19.3 379.65 N 132.80 E 7400.0 33.16 22.53 7309.2 339.9 7228.2 2.19 455.6 19.5 429.37 N 152.26 E 7450.0 34.21 24.68 7350.8 359.2 7269.8 3.18 483.2 19.8 454.77 N 163.37 E 7500.0 32.45 20.60 7392.6 378.6 7311.6 5.70 510.7 19.9 480.11 N 173.96 E 7550.0 31.47 17.00 7435.1 398.6 7354.1 4.30 537.1 19.9 505.15 N 182.50 E 7600.0 31.37 11.36 7477.7 419.5 7396.7 5.88 563.0 19.6 530.39 N 188.88 E 7650.0 30.64 .83 7520.6 442.1 7439.6 10.93 588.0 19.0 555.91 N 191.62 E 7700.0 30.37 356.16 7563.7 465.8 7482.7 4.77 611.8 18.2 581.27 N 190.96 E 7750.0 30.22 348.52 7606.9 490.2 7525.9 7.71 634.6 17.2 606.22 N 187.61 E 7800.0 30.41 343.63 7650.1 515.1 7569.1 4.95 656.3 16.1 630.69 N 181.54 E 7850.0 30.44 339.58 7693.2 540.4 7612.2 4.10 677.3 14.8 654.71 N 173.56 E 7900.0 30.53 339.34 7736.3 565.7 7655.3 .30 698.2 13.6 678.46 N 164.66 E 8000.0 30.03 337.32 7822.6 616.1 7741.6 1.13 739.9 11.4 725.31 N 146.05 E 8100.0 29.95 339.03 7909.2 666.1 7828.2 .86 782.2 9.4 771.71 N 127.47 E 8200.0 29.47 338.81 7996.1 715.7 7915.1 .49 825.3 7.6 817.95 N 109.65 E 8300.0 29.60 336.58 8083.1 765.0 8002.1 1.11 868.3 6.0 863.55 N 90.94 E 8400.0 29.19 336.32 8170.2 814.0 8089.2 .42 911.3 4.5 908.55 N 71.33 E 8500.0 28.72 336.58 8257.7 862.4' 8176.7 .49 954.3 3.1 952.93 N 51.99 E 8600.0 28.14 336.97 8345.7 910.0 8264.7 .61 997.2 1.9 996.68 N 33.21 E 8700.0 29.63 337.24 8433.2 958.3 8352.2 1.49 1041.3 . 8 1041.18 N 14.42 E 8800.0 28.63 337.45 8520.6 1007.0 8439.6 1.00 1086.1 359.8 1086.10 N 4.33 W 8900.0 27.68 336.73 8608.7 1054.2 8527.7 1.01 1129.8 358.8 1129.57 N 22.69 W 9000.0 24.52 338.06 8698.5 1098.2 8617.5 3.21 1170.8 358.1 1170.17 N 39.62 W A G Y rod a taD ire c t ion a 1 Sur v e y B.P. EXPLORATION WELL: Z - 23, 4 1/.2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266 Page 5 MEASURED I N C L AZIMUTH VERTICAL VERTICAL SUBSEA DOGLEG CLOSURE H 0 R I Z 0 N TAL DEPTH DEPTH SECTION DEPTH SEVERITY DIST. AZIMUTH COO R DIN ATE S feet deg. deg. feet feet feet deg./ feet deg. feet 100 ft. 9100.0 22.06 339.05 8790.4 1137.7 8709.4 2.50 1208.2 357.4 1206.96 N 54.09 W 9200.0 19.34 340.95 8883.9 1173.0 8802.9 2.80 1241.9 356.9 1240.15 N 66.21 W 9300.0 17.56 343.07 8978.8 1204.6 8897.8 1.90 1272.5 356.6 1270.23 N 76.01 W 9400.0 15.84 346.09 9074.6 1233.1 8993.6 1.92 1300.6 356.3 1297.91 N 83.68 W 9470.0 15.33 347.81 9142.0 1251.7 9061.0 .98 1319.2 356.2 1316.23 N 87.93 W Final Station Closure: Distance: 1319.16 ft Az: 356.18 deg. Horizontal Coordinates Calculated from Local Horizontal Reference Closure Calculated from Well Head Location Vertical Section Calculated from Well Head Location 337.770 deg Proposed Well Direction: Azimuth Corrected:: Gyro: Bearings are Relative to True North Sub-sea Correction from Vertical Reference: 81 ft. Survey Latitude: 70.300000 deg. N Calculation Method: MINIMUM CURVATURE Surveyor: TOM STODDARD 12:27:11 Run Date: 27-May-95 Job Number: AK0595G266SS r. [.,",ï) \', ~. .. ~ i'" ~-' OC1 ~\ 9 \9~5 A\~~ 0\\ & Gas Cons. Commisffion --~\. ~chOrag8 Location: Z PAD, PRUDHOE BAY FIELD WELL: Z - 23, 4 1/2" TUBING B.P. EXPLORATION for A G Y rod a taD ire c t ion a 1 Sur v e y A G Y rod a taD ire c t ion a 1 Sur v e y B.P. EXPLORATION WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266SS SUBSEA DEPTH feet -81.0 I N C L AZIMUTH VERTICAL DEPTH deg. deg. feet 0.00 0.00 0.0 VERTICAL SECTION feet 0.0 DOGLEG SEVERITY deg./ 100 ft. 0.00 CLOSURE DIST. AZIMUTH feet deg. --------------------------------------------------------------- 0.0 AEASURED DEPTHS REFERENCED TO R.K.B. HEIGHT 81 FEET. 0.0 - 9470.0 FEET; GYRO DATA SURVEY RUN IN 4 1/2" TUBING. --------------------------------------------------------------- 100.0 200.0 300.0 400.0 500.0 600.0 700.0 800.0 900.0 1000.0 1100.0 1200.0 1300.0 1400.0 1500.0 1600.0 1700.0 1800.0 1900.0 2000.0 .20 .18 .22 .34 .19 .36 .29 .20 .35 .44 .40 .46 .49 .69 .89 1.25 1.12 1.10 1.15 1.14 254.41 207.61 223.03 220.72 156.42 173.22 138.87 129.87 169.72 168.24 170.04 152.74 110.30 100.46 92.57 84.73 82.85 81.77 87.12 83.09 181.0 281.0 381.0 481.0 581.0 681.0 781.0 881.0 981.0 1081.0 1181.0 1281.0 1381.0 1481.0 1581.0 1681.0 1781.0 1881.0 1981.0 2081.0 - . 0 -.1 -.2 -.5 -.7 -1.2 -1.7 -2.1 -2.5 -3.2 -3.9 -4.6 -5.3 -5.9 -6.5 -7.2 -7.7 -8.2 -8.8 -9.4 .11 .19 .15 .14 .32 .32 .32 .13 .26 .15 .08 .17 .35 .27 .24 .39 .28 .08 .13 .14 .4 . 7 1.0 1.6 1.9 2.2 2.6 2.7 3.1 3.8 4.5 5.2 5.6 6.0 6.7 7.7 9.0 10.4 12.1 13.9 0.0 242.9 240.7 233.5 229.5 224.3 215.4 205.8 197.4 192.2 188.4 185.1 181.6 175.5 166.3 155.0 141.8 130.2 122.0 116.1 111.7 Page 1 H 0 R I Z 0 N TAL COO R DIN ATE S feet 0.00 N 0.00 E .17 S .33 S .59 S .95 S 1.31 S .34 W .58 W .78 W 1.11 W 1.27 W 1.75 S 2.25 S 2.55 S 2.95 S 3.62 S 1.23 W 1.07 W .80 W .63 W .52 W 4.34 S 5.04 S 5.53 S 5.78 S 5.92 S .38 W .13 W .47 E 1.42 E 2.78 E 5.84 S 5.61 S 5.35 S 5.17 S 5.00 S 4.64 E 6.70 E 8.62 E 10.58 E 12.58 E A G Y rod a t a D i r e c t i o n a 1 S u fvey [~) " i. .. ¡,,; 5 -- B.P. EXPLORATION OCT ~t 9 î995 Page 2 WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Aiaska Oil.& Gas Cons. Commission Job Number: AK0595G266SS - "~..,J -, t Mchorage SUBSEA I N C L AZIMUTH VERTICAL VERTICAL DOGLEG CLOSURE H 0 R I Z 0 N TAL DEPTH DEPTH SECTION SEVERITY DIST. Þ..ZIMUTH COO R D I N ATE S feet deg. deg. feet feet deg./ feet deg. feet 100 ft. 2100.0 1.09 85.62 2181.0 -9.9 .11 15.6 108.4 4.80 S 14.52 E 2200.0 .96 91.94 2281.0 -10.6 .17 17.3 106.3 4.76 S 16.31 E 2300.0 .78 113.61 2381.0 -11.4 .37 18.7 105.8 5.04 S 17.76 E 2400.0 .77 110.33 2481.0 -12.3 .19 20.0 106.2 5.53 S 19.00 E 2500.0 .76 133.50 2581.0 -13.3 .36 21.3 107.2 6.21 S 20.10 E 2600.0 .63 133.88 2681.0 -14.4 .22 22.3 108.5 7.04 S 20.96 E 2700.0 .53 163.36 2781.0 -15.4 .33 23.0 110.1 7.85 S 21.49 E 2800.0 .52 170.42 2881.0 -16.3 .07 23.5 111.9 8.72 S 21.70 E 2900.0 .37 188.31 2981.0 -17.0 .20 23.8 113.6 9.48 S 21.74 E 3000.0 .55 195.08 3081.0 -17.7 .27 23.9 115.4 10.26 S 21.58 E 3100.0 .27 206.34 3181.0 -18.2 .39 24.0 117.1 10.94 S 21.36 E 3200.0 .20 215.99 3281.0 -18.5 .10 24.0 118.1 11.30 S 21.16 E 3300.0 .33 152.88 3381.0 -18.8 .32 24.3 118.8 11.65 S 21.22 E 3400.0 .37 136.20 3481.0 -19.4 .08 24.9 119.3 12.10 S 21.60 E 3500.0 1.49 299.84 3581.0 -18.5 1.70 24.0 117.7 11.24 S 21.39 E 3600.0 3.68 328.94 3681.0 -14.2 2.37 19.9 110.8 7.42 S 19.26 E 3700.0 4.58 326.12 3781.0 -7.1 .91 14.5 94.2 1.38 S 15.33 E 3800.0 4.02 327.79 3881.0 .3 .77 12.1 65.6 4.99 N 11.22 E 3900.0 2.55 326.31 3981.0 5.9 1.48 13.0 40.1 9.74 N 8.11 E 4000.0 1.79 320.23 4081.0 9.6 .79 14.4 24.9 12.81 N 5.89 E 4100.0 1.58 294.00 4181.0 12.1 .82 15.2 14.2 14.57 N 3.67 E 4200.0 2.05 271.84 4281.0 13.8 .88 15.2 2.5 15.15 N .67 E 4300.0 2.05 257.52 4381.0 14.8 .56 15.1 349.1 14.80 N 2.88 W 4400.0 1.69 261.60 4481.0 15.4 .47 15.6 337.0 14.19 N 6.05 W 4500.0 1.40 270.06 4581.0 16.2 .37 16.7 328.1 13.97 N 8.73 W A G Y rod a t a D i r e c t i o n a 1 Sur v e y B.P. EXPLORATION Page 3 WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266SS SUBSEA I N C L AZIMUTH VERTICAL VERTICAL DOGLEG CLOSURE H 0 R I Z 0 N TAL DEPTH DEPTH SECTION SEVERITY DIST. AZIMUTH COO R D I N ATE S feet deg. deg. feet feet deg./ feet deg. feet 100 ft. 4600.0 1.12 260.23 4681.0 16.9 .40 17.8 321.7 13.81 N 10.91 W 4700.0 .95 244.11 4781.0 17.1 .34 18.4 316.5 13.29 N 12.61 W 4800.0 .83 233.30 4881.0 16.9 .21 18.8 311.9 12.51 N 13.93 W 4900.0 .85 241.87 4981.0 16.6 .19 19.3 307.7 11.73 N 15.17 W 5000.0 .78 249.14 5081.0 16.5 .14 20.0 304.1 11.14 N 16.46 W 5100.0 .61 248.19 5181.0 16.6 .17 20.7 301.3 10.70 N 17.59 W 5200.0 .66 249.16 5281.0 16.6 .11 21.4 298.9 10.30 N 18.63 W 5300.0 .74 248.40 5381.0 16.6 .08 22.2 296.5 9.86 N 19.76 W 5400.0 .92 229.70 5481.0 16.3 .33 23.0 293.5 9.10 N 20.96 W 5500.0 .81 229.11 5581.0 15.9 .22 23.7 290.2 8.11 N 22.09 W 5600.0 .84 240.04 5681.0 15.5 .19 24.5 287.4 7.28 N 23.27 W 5700.0 .75 249.06 5781.0 15.5 .18 25.6 285.3 6.68 N 24.51 W 5800.0 2.48 51.14 5881.0 17.2 2.72 26.5 288.7 8.44 N 24.90 W 5900.0 4.83 17.32 5981.0 22.2 2.61 27.8 301.6 14.44 N 23.38 W 6000.0 7.07 22.15 6081.0 29.8 2.28 32.1 320.4 24.18 N 19.73 W 6100.0 9.11 20.05 6181.0 40.2 2.07 41.9 338.1 37.44 N 14.63 W 6200.0 10.96 19.88 6281.0 53.3 1.82 57.0 350.6 54.06 N 8.61 W 6300.0 12.73 21.34 6381.0 68.6 1.76 76.0 358.8 73.65 N 1.22 W 6400.0 14.54 25.01 6481.0 85.6 1.97 98.3 4.9 95.89 N 8.41 E 6500.0 16.11 26.89 6581.0 103.8 1.57 123.5 9.5 120.48 N 20.33 E 6600.0 18.07 28.70 6681.0 123.5 1.96 151.8 13.2 147.60 N 34.64 E 6700.0 20.72 28.38 6781.0 145.9 2.52 220.4 16.1 178.62 N 51.50 E 6800.0 23.13 25.62 6881.0 172.3 2.44 260.7 18.0 214.64 N 69.73 E 6900.0 25.62 21.65 6981.0 204.1 2.71 304.9 18.9 256.33 N 87.75 E 7000.0 27.89 19.76 7081.0 241.2 2.13 352.0 19.2 303.65 N 105.51 E A G Y rod a t a D i r e c t i o n a 1 Sur v e y B.P. EXPLORATION Page 4 WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number: AK0595G266SS SUBSEA I N C L AZIMUTH VERTICAL VERTICAL DOGLEG CLOSURE H 0 R I Z 0 N TAL DEPTH DEPTH SECTION SEVERITY DIST. AZIMUTH COO R D I N ATE S feet deg. deg. feet feet deg./ feet deg. feet 100 ft. 7100.0 30.11 19.78 7181.0 282.4 2.03 402.2 19.2 355.79 N 124.21 E 7200.0 32.57 21.73 7281.0 326.9 2.31 455.6 19.4 412.76 N 145.76 E 7300.0 32.94 21.74 7381.0 373.2 5.00 510.7 19.9 473.06 N 171.01 E 7400.0 31.31 10.55 7481.0 421.2 6.27 588.0 19.6 532.34 N 189.09 E 7500.0 30.31 353.10 7581.0 475.6 5.95 634.6 17.8 591.26 N 189.62 E 7600.0 30.43 340.72 7681.0 533.3 4.34 677.3 15.2 647.92 N 175.81 E 7700.0 30.27 338.29 7781.0 591.8 .73 739.9 12.5 702.72 N 155.02 E 7800.0 29.98 338.48 7881.0 649.8 .95 782.2 10.0 756.58 N 133.53 E 7900.0 29.56 338.85 7981.0 707.1 .55 825.3 7.9 809.91 N 112.74 E 8000.0 29.59 336.64 8081.0 763.8 1.09 868.3 6.1 862.45 N 91.39 E 8100.0 29.13 336.35 8181.0 820.0 .43 954.3 4.3 914.01 N 68.95 E 8200.0 28.57 336.68 8281.0 875.0 .52 997.2 2.8 964.51 N 47.02 E 8300.0 28.74 337.08 8381.0 929.5 .97 1041.3 1.5 1014.64 N 25.63 E 8400.0 29.08 337.36 8481.0 985.0 1.22 1086.1 .2 1065.75 N 8.90 W 8500.0 27.98 336.96 8581.0 1039.3 1.01 1129.8 359.1 1115.89 N 16.91 W 8600.0 25.14 337.80 8681.0 1089.6 2.78 1170.8 358.2 1162.24 N 36.32 W 8700.0 22.31 338.95 8781.0 1133.7 2.57 1208.2 357.5 1203.20 N 52.61 W 8800.0 19.42 340.89 8881.0 1171.9 2.79 1241.9 357.0 1239.11 N 65.84 W 8900.0 17.52 343.14 8981.0 1205.2 1.90 1300.6 356.6 1270.87 N 76.19 W 9000.0 15.79 346.25 9081.0 1234.9 1.83 1319.2 356.3 1299.66 N 84.09 W 9061.0 15.33 347.81 9142.0 1251.7 .98 1319.2 356.2 1316.23 N 87.93 W Final Station Closure: Distance: 1319.16 ft Az: 356.18 deg. gyro/data 4. QUALITY CONTROL SR266.DOC Quality Control Comparisons B.P. EXPLORATION WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Job Number : AK0595G266 / AK0595G266 INRUN/OUTRUN Comparison INRUN OUTRUN INRUN OUTRUN Depth Inc Inc Delta Az Az Delta 2000.0 1.21 1.17 .041 88.43 88.42 .010 3000.0 .45 .33 .114 192.12 192.45 -.327 4000.0 2.28 2.26 .018 328.09 325.90 2.188 4500.0 1.70 1.62 .076 261.55 262.96 -1.410 6000.0 5.60 5.24 .364 21.19 19.05 2.144 6500.0 14.92 14.70 .215 25.87 25.35 .517 7500.0 32.18 32.45 -.277 21.11 20.60 .509 8000.0 30.12 30.03 .096 336.75 337.32 -.571 8500.0 28.81 28.72 .087 337.14 336.58 .561 9000.0 24.27 24.52 -.253 337.79 338.06 -.277 9470.0 15.33 15.33 .001 348.08 347.81 .271 For Inclinations Greater than 10 degrees: Average Inclination Difference Average Azimuth Difference -.0218 deg. .16829 deg. gyro/data QUALITY CONTROL REPORT JOB NUMBER: AK0595G266 TOOL NUMBER: 080 MAXIMUM GYRO TEMPERATURE: 79.7c MAXIMUM AMBIENT TEMPERATURE: 111.4c MAXIMUM INCLINATION: 34.2 AVERAGE AZIMUTH: 337.77 WIRELlNE REZERO VALUE: -6.0 REZERO ERROR I K : n/a CALIBRATION USED FOR FIELD SURVEY: 12 MAY, 1995 CALIBRATION USED FOR FINAL SURVEY: 12 MAY, 1995 PRE JOB MASS BALANCE OFFSET CHECK: .135 -.00 -.09 USED -0.0 POST JOB MASS BALANCE OFFSET CHECK! : CONDITION OF SHOCK WATCHES UPON ARRIVAL AT RIG: OK UPON COMPLETION OF SURVEY: OK UPON RETURN TO ATLAS OK BOTTOM LINE COMPARISIONS M.D. INC AZIMUTH TVD NORTHING EASTING FIELD SURVEY FINAL SURVEY 9470 9470 15.33 15.33 347.76 347.81 9142 9142 1314.0 N 1316.23 N 88.7W 87.93 W SR266.DOC -.0218 deg. .52222 deg. Average Inclination Difference Average Azimuth Difference For Inclinations Greater than 10 degrees: Job Number : AK0595G266 / AK0595G266 INRUN/OUTRUN Comparison INRUN OUTRUN INRUN OUTRUN Depth Inc Inc Delta Az Az Delta 2000.0 1.21 1.17 .041 88.43 88.42 .010 3000.0 .45 .33 .114 192.12 192.45 -.327 4000.0 2.28 2.26 .018 325.56 325.90 -.340 4500.0 1.70 1.62 .076 263.33 262.96 .363 6000.0 5.60 5.24 .364 19.36 19.05 .317 6500.0 14.92 14.70 .215 25.56 25.35 .209 7500.0 32.18 32.45 -.277 21.11 20.60 .509 8000.0 30.12 30.03 .096 338.15 337.32 .833 8500.0 28.81 28.72 .087 337.14 336.58 .561 9000.0 24.27 24.52 -.253 338.82 338.06 .751 9470.0 15.33 15.33 .001 348.08 347.81 .271 B.P. EXPLORATION WELL: Z - 23, 4 1/2" TUBING Location: Z PAD, PRUDHOE BAY FIELD Quality Control Comparisons ..c+~'" ~, gyro{data FUNCTION TEST JOB NUMBER: AK0595G266 5 Survey stations were collected at the measured depth shown below. The tables show the repeatability of the gyro tool in both inclination and azimuth at one measured depth. INCLINA TION M.D. ft 1 2 3 4 5 9470 15.3 15.3 15.3 15.3 15.3 AZIMUTH M.D. ft 1 2 3 4 5 9470 348.0 347.8 347.8 347.8 347.7 SR266.DOC gyro/data "--'1 '.~ 5. EQUIPMENT AND CHRONOLOGICAL REPORT SR266.DOC ¿~f··· /"""- gyro~ata EQUIPMENT REPORT JOB NUMBER: AK0595G266 DOWNHOLE ELECTRONICS SURFACE ELECTRONICS PRIMARY TOOL No. 080 COMPUTER A0153 GYRO SECTION A0094 POWER SUPPLY A0055 DATA SECTION A0025 PRINTER A0079 POWER SECTION AOO52 INTERFACE A0035 BACKUP TOOL No. 136 COMPUTER A0122 GYRO SECTION AOO99 POWER SUPPL Y A0036 DATA SECTION A0029 PRINTER A0029 POWER SECTION A0027 INTERFACE A0035 WIRELlNE COMPANY: ATLAS WIRELlNE CABLE SIZE: 7/32 RUNNING GEAR 2 1/2" System w/3" heat shield and eccentric bar, and 3.6" wear bushings. TOTAL LENGTH OF TOOL: 25.5 feet MAXIMUM 0.0. : 3.6 INCHES TOTAL WEIGHT OF TOOL: 250Lbs SR266.DOC gyro/data 5/26/95 2300 2400 5/27/95 1000 1100 1200 1300 1345 1440 1540 1700 1830 1850 1945 2045 5/28/95 0730 0930 1100 1500 J"c-~"" CHRONOLOGICAL REPORT JOB NUMBER: AK0595G266 DRIVE TO MILNE POINT, CROSS BRIDGE. ARRIVE J PAD. PUT EQUIPMENT IN DOGHOUSE. DRIVE TO CAMP. LEAVE FOR Z PAD. ARRIVE LOCATION, MU TOOL SAFETY MEETING. COMMUNICATION ERROR. SWAP POWER AND DATA SECTIONS.STILL NOT COMMUN. RUN ON LOW FREQ. O.K. PU TOOL, ZERO. MU LUBRICATOR RIH. 5000'. 9470' TOOL DOWN, ADD 10'. 6000', 1200' LD TOOL. RD ATLAS AND BD TOOL, PROCESS SURVEY. RTN MILNE POINT CAMP. KUPARUK AIR STRIP W/ EQUIPMENT. ERA TO DEADHORSE. ATLAS. CHECK TOOLS STANDBY FOR ENDICOTT 3-37/L351 SR266.DOC ,.. LARRY GRANT Attn. ALASKA OIL + GAS CONSERVATION 3001 PORCUPINE DRIVE ANCHORAGE AK ': 99 501 . Date: 2 October 1995 RE: Transmittal of Data Sent by: HAND CARRY Dear Sir/Madam, Enclosed, please find the data as described below: WELL ~ # DESCRIPTION ECC No. Z-131D"~ ~~ 1 PLS· FINAL BL+RF Run ~ 1 4544.03 11" Z-23A í,O 1 ~ ~') 0/ PLS FINAL BL+RF Run 11" 1 6418.04 W-12 qÖ..DJ 1 PLS FINAL BL+RF Run ~ 1 6489.00 11" Received by: RECEIVED OCT 1 3 1995 Anchorage, AI< 99518 A.laska O. Or FAX to (907) 563-7803 II & Gas Cons. Com . ~Z AnChorage InuS8íon ~ Date: Please sign and return to: Attn. Rodney D. Paulson Atlas Wireline Services 5600 B Street Suite 201 :. ~~~ ~~"·;::i, -~:~::~;~~:i;~~~~ ~ -.~:' < ~..~:..'~~~~>:~-'~ '~:~~,~',~ ~',~~~~-.~.~~,~' ~='3!LI!Ç!:~, ~ '-<~'.:::;::~... ,,_ . Schlumberger - GeoQuest A Division of Schlumberger Technologies Corporation 500 W. International Airport Road Anchorage, Alaska 99518 - 1199 (907) 562-7669 (Bus.) (907) 563-3309 (Fax) June 26, 1995 TO: BP Exploration (Alaska) Inc. Petrotectmical Data Center, MB3-3 900 E. Benson Blvd. Anchorage, Alaska 99519-6612 ~ --- / ~l-¡:) q) //_/A The following data of the MWD GR for well Z-23A ,Job # 95186 (REDO) was sent to: BP Exploration (Alaska) Inc. Petrotechnical Data Center, MB3-3 900 E. Benson Blvd. Anchorage, Alaska 99519-6612 1 OH LIS Tape Arco Alaska Inc. Dede Schwartz A TO-1336 Anchorage, Alaska 99510-0360 1 OH LIS Tape 1 ~---_____________ o l¿ \{ i'" ~- -,~, ~ '( ) vJ t!4~~~-3r- Exxon Company, USA Alaska Interest Organization Attn: Susan Nisbet 800 Bell S1., EB3083 Houston, Texas 77002-7420 1 OH LIS Tape Certified Mail # P 905 127 863 Phillips Company Attn: Monica Warnken (Room B-2) P.O. Box 1967 Houston. Texas 77251-1967 1 OH LIS Tape Certified Mail # P 905 127 864 PLEASE NOTE: THIS TAPE REPLACES THE ONE SENT JUNE 5,1995. THIS TAPE WAS DEPTH CORRECTED; THE FIRST TAPE WAS NOT. PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COpy EACH TO: BP EXPLORATION (ALASKA) INC. R E ( E I V E 'lHLUMBERGER GEOQUEST PETROTECHNICAL DATA CENTER. MB3-3 500 WEST II..JTERNATIONAL AIRPORT ROAD 900 EAST BENSON BLVD. J U N 2 6 1995 ANCHORAGE, ALASKA 99518-1199 / ANCHORAGE, ALASKA 99519-6612 Alaska Oil & Gas Cons. Commission Fif.. 1 r' i 1 Schlumhprger Courier: Date Delivered: Anchorage Received By: itlv'-ilrtv . .UlC)J¡VylI !-- .---.. Schlumberger - GeoQuest A Division of Schlumberger ï echnologies Corporation 500 W. International Airport Road Anchorage, Alaska 99518 - 1199 (907) 562-7669 (Bus.) (907) 563-3309 (Fax) June 5, 1995 TO: BP Exploration (Alaska) Inc. Petrotechnical Data Center, MB3-3 900 E. Benson Blvd. Anchorage, Alaska 99519-6612 The following data of the MWD GR for well Z-23A I Job # 95186 was sent to: 9S-- U BP Exploration (Alaska) Inc. Petrotechnical Data Center, MB3-3 900 E. Benson Blvd. Anchorage, Alaska 99519-6612 1 OH LIS Tape Arco Alaska Inc. Dede Schwartz ATO-1336 Anchorage, Alaska 99510-0360 1 OH LIS Tape ~", -ã: 1 OH LIS Tape ._:-~.~J .~~~~ Exxon Company, USA Alaska Interest Organization Attn: Susan Nisbet 800 Bell St., EB3083 Houston, Texas 77002-7420 1 OH LIS Tape ;~1 Phillips Company Attn: Monica Warnken (Room B-2) P.O. Box 1967 Houston, Texas 77251-1967 1 OH LIS Tape PLEASE ACKNOWLEDGE RECEIPT BY SIGNING AND RETURNING ONE COPY EACH TO: RECEIVED BP EXPLORATION (ALASKA) INC. PETROTECHNICAL DATA CENTER. MB3-3 900 EAST BENSON BLVD. ANCHORAGE, ALASKA 99519-6612 SGhll Imherper Courier: SCHLUMBERGER GEOQUEST 500 WEST INTERNATION(iij ~Pþ¡g- ~98§ ANCHORAGE. ALASKA 99'5'1'8-"'1199 Alaska Oil & Gas Cons. Commission Anchorage Received By: LARRY GRANT Date: 22 May 1995 Attn. ALASKA OIL + GAS CONSERVATION 3001 PORCUPINE DRIVE RE: Transmittal of Data ANCHORAGE AK, 99501. Sent by: PRIORITY MAIL Dear Sir/Madam, Enclosed, please find the data as described below: WELL # DESCRIPTION ECC No. õ>8- 8 1 F-35 (23-36-12-13) 1 PLS FINAL BL+RF Run # 1 3820.05 ð'o - -2"2? X-09 1 CCL FINAL BL+RF Run # 1 5638.03 9~-83 N-24 (22-17-11-13) 1 PFC/PERF FINAL BL+RF Run # 1 5734.04 EO¡ -1b Z-18 1 PFC/PERF FINAL BL+RF Run # 1 5779.01 cr~-$ Z-23A 1 PFC/PERF FINAL BL+RF Run # 1 6418.02 Please sign and return to: Attn. Rodney D. Paulson Atlas Wire line Services 5600 B Street Suite 201 Anchorage, AK 99518 Or FAX to (907) 563-7803 Received by: Date: Plea,r;~~ 81.gn \?nd return 'Co, Petrotechnical Data Center B~ E~Ploration (Alaska) I~o 9(,0 Eas ènson Boulevard 1lr!cl1 - aeka ~~~ E I V E D D~t;-·-- Alaska Ö¡I & Gás ~~ ubll»1Jisslon ....," "'''Anchorage " ' '- '--,.,-:.,...r,1.·· ¡ ., ~.___~A t.2 ~_19q,~ ~ . .~ .&- -- Alaska Oil & Gas Goos. Comm'SSlOfi Anchorage ..---.. Dat~ Please sign and return to~ Petrotechnical Data Center BP Exploration (Alaska) Ina 900 ~ Benson Boulevard # AJ.aska 99508 Received by: Date: Please sign and return to: Attn. Rodney D. Paulson Atlas Wireline Services 5600 B Street suite 201 Anchorage, AK 99518 Or FAX to (907) 563-7803 WELL # DESCRIPTION ECC No. ß êJ - 7 Lj X-IS (44-05-10-14) 1 CCL FINAL BL+RF Run # 1 1148.01 80- Sð D-28 1 PFC/PERF FINAL BL+RF Run # 1 4911.06 ,8- ~3 C-03 1 PLS FINAL BL+RF Run # 1 6041.04 cr5-Lj3 Z-23A 1 SBT/GR FINAL BL+RF Run # 1 6418.01 8LJ-~) X-23 1 PLS FINAL BL+RF Run # 1 6429.00 Enclosed, please find the data as described below: Dear Sir/Madam, Sent by: PRIORITY MAIL Transmittal of Data RE: LARRY GRANT Attn. ALASKA OIL + GAS CONSERVATION 3001 PORCUPINE DRIVE ANCHORAGE AK, 99501. 16 May 1995 Date: ';;.....~,,:.. ;.''': ~~. to.. 4. . II" LARRY GRANT Attn. ALASKA OIL + GAS CONSERVATION 3001 PORCUPINE DRIVE Date: RE: 1 May 1995 Transmittal of Data ANCHORAGE AK, 99501. ECC #: 6418.00 Sent by: PRIORITY MAIL Data: OH-LDWG Dear Sir/Madam, Reference: BP C/f ~ - /--1 ':::> Z-23A I,:) --~ PRUDHOE BAY NORTH SLOPE, AK Enclosed, please find the data as described below: Prints/Filma: 1 DIFL/GR/SP FNL BL+RF Run # 1 1 BHC-AC/GR FNL BL+RF Run # 1 1 CN/GR FINAL BL+RF Run # 1 1 FMT/GR FINAL BL+RF Run # 1 1 SSVD FINAL BL+RF Run # 1 Please sign and return to: Attn. Rodney D. Paulson Atlas Wireline Services 5600 B Street Suite 201 Anchorage, AK 99518 Or FAX to (907) 563-7803 Received by: Date: ~- ~~..- . ---.~.---- . _R"EC.E.L\lEJL~--. Date. ..~.'''''''' M À Y '.' 12'·'1995 Alaska 011 & Gas Cons. CommissIon Anchorage ~'lJ~lrŒ illJlr ~~~~~lK\~ ALASIiA. OIL AND GAS . CONSERVATION COMMISSION / I TONY KNOWLES, GOVERNOR 3001 PORCUPINE DRIVE ANCHORAGE, AU\SKA 99501-3192 PHONE: (907) 279-1433 FAX: (907) 276·7542 April 13, 1995 Terry Jordan Drilling Engineer Supervisor BP Exploration (Alaska), Inc. POBox 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Unit Z-23A BP Exploration (Alaska), Inc. Permit No. 95-43 Sur. Loc. 4560'NSL, 3214'WEL, Sec. 19, TIIN, R12E, UM Btmnhole Loc. 631'NSL, 3314'WEL, Sec. 18, TIIN, R12E, UM Dear Mr. Jordan: Enclosed is the approved application for permit to redrill the above referenced well. The permit to redrill does not exempt you from obtaining additional permits required by law from other governmental agencies, and does not authorize conducting drilling operations until all other required permitting determinations are made. Blowout prevention equipment (BOPE) must be tested in accordance with 20 AAC 25 035. Sufficient notice (approximately 24 hours) must be given to allow a representative of the Commission to witness a test of BOPE installed prior to drilling new hole. Noti~e may be given by contacting the Commission petroleum field inspector on the North Slope pager at 659-3607. dlf/Enclosures cc: Department of Fish & Game, Habitat Section wlo encl. Department of Environmental Conservation wlo encl. ,~ STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION PERMIT TO DRILL 20 AAC 25.005 1 a. Type of work Drill D Redril! ~11 b. Type of well. Exploratory 0 Stratigraphic Test 0 Development OillXJ Re-Entry D Deepen 0 Service 0 Development Gas 0 Single Zone 0 Multiple Zone D 2. Name of Operator 5. Datum Elevation (DF or KB) 10. Field and Pool BP EXDloration KBE = 81.04' feet Prudhoe Bay Field/Prudhoe 3. Address 6. Property Designation Bay Pool P. O. Box 196612 Anchoraae Alaska 99519-6612 ADL 28262 4. Location of well at surface 7. Unit or property Name 11. Type Bond(see 20 AAC 25.025) 4560' NSL, 3214' WEL, SEC. 19, T11N, R12E Prudhoe Bay Unit At top of productive interval 8. Well number Number 561' NSL, 3286' WEL, SEC. 18, T11N, R12E Z-23A (31-18-11-12) 2S 100302630-277 At total depth 9. Approximate spud date Amount 631' NSL, 3314' WEL, SEC. 18, T11N, R12E 4/15/95 $200,000.00 12. Distance to nearest 13. Distance to nearest well n 4. Number of acres in property 15. Proposed depth (MD and TVD) property line No close approach feet 9551' MD/9210' TVD feet ADL 47453-631' feet 2560 16. To be completed for deviated wells 17. Anticipated pressure (see 20 AAC 25.035 (e)(2)) Kickoff depth 7480 feet Maximum hole angle35.06 0 Maximum surface 2970 psig At total depth (TVD) 8800' / 3850 psig 18. Casing program Specifications Setting Depth size Top Bottom Quantity of cement Hole Casing Weight Grade Coupling Length MD TVD MD TVD (include stage data) 8-1/2" 7" 29# L-80 NSCC 2226' 7325' 7236' 9551' 9210' 250 sx Class "G" DJ:rl:l\/J:r\ ø, L \w L I Y L LI 19. To be completed for Redrill, Re-entry, and Deepen Operations. APR - 4 1995 Present well condition summary Total depth: measured 9809 feet Plugs (measured) Alaska Oil & Gas Cons. Commission true vertical 9315 feet Anchora fA Effective depth: measured 9704 feet Junk (measured) true vertical 9211 feet Casing Length Size Cemented Measured depth True Vertical depth Structu ral Conductor 82' 20" 118' 118' Surface 2621' 13-3/8" 3684 cu ft PF 2657' 2657' Intermediate 9089' 9-5/8" 1894 cu ft "G" 9125' 8663' Production Liner 937' 5-1/2" 541 cu ft "G" 9809' 9315' Perforation depth: measured 9468'-9509', 9512'-9520' (Open) 9552'-9592' (Squeezed) true vertical 8990'·9029', 9033'-9040' (aDen) 9070'-9108' (Saueezed) 20. Attachments Filing fee ŒJ Property plat 0 BOP Sketch 0 Diverter Sketch 0 Drilling program ŒI Drilling fluid program IX] Time vs depth plot 0 Refraction analvsis 0 Seabed report 0 20 AAC 25.050 requirementsD 21. I .herebY ce1~ that the f;:Jing is true and correct to the best of my knowledge 11-1 -/1 S Signed 'UVJ 1 w.-. Title Drilling Engineer Supervisor Date t , U Commission Use Only , perm~ Number API number IAPpr1~al /;~ See cover letter '~-~3 50- 6.2.. 9.... ¿ / 9' 5"0 - 0 i ~j '1:'1 for other requirements Conditions of approval Samples required o Yes ~ No Mud log required D Yes ~ No Hydrogen sulfide measures 81 Yes DNa Directional survey required ~ Yes DNa Required working pressure for BOPE D 2M; D3M; ~5M; D10M; D15M; Other: Uriginal Signed By by order of Date 113/'16- Approved by David W. Johnston Commissioner me commission Form 10-401 Rev. 12-1-85 Submit In triplicate ,-.. WeIIName: Z-23A Redrill Plan Summary I Type of Redrill (producer or injector): I Producer Surface Location: 4560' FSL, 3214' FEL, S19, TIIN, RI2E, UM Target Location: 561' FSL, 3286' FEL, S18, TIIN, RI2E, UM Bottom Hole Location: 631' FSL, 3314' FEL, S18, TIIN, RI2E, UM 1 Rig: Doyon 16 1 Operating days to complete: 116 I TVD: 19210' rkb I 1 KBE: 81.04' I AFE Number: 4P0664 I Estimated Start Date: 14/15/95 I MD: 19551' I Well Design (conventional, slimhole, etc.): I Sidetrack Objective: Sidetrack the present well to establish an offtake point in the area while avoiding a water-conductin fault. Mud Program: A 9.9 - 10.2 ppg Biozan/gel LSND fresh water-based mud will be used. I Special design I considerations none Depth Density PV yp INT tOMIN FL OIL SOLIDS (TVD) (PPG) (CP) ( #/FT) GEL GEL cc/30min (0/0) (%) KOP' 9.9 10 15 5 10 10 0 5 to to to to to to to to to TD' 10.2 18 30 15 30 5 0 8 35.06 degrees (sidetrack portion) NONE RECt\\JED APR - 4 1995 as Cons. Gommiss\on chorap Redrill Plan Summary Page 1 /-"'- CasinWTubing Program: Hole Size Csg/ WtlFt Grade Conn Length Top Btm Tbg O.D. MD/TVD MD/TVD 8.5" 7" 29# L-80 NSCC 2226' 7325'/7236' 9551'/9210' TBG 4.5" 12.6# L-80 IDS 9030' 30 9060'/8740' Well Control: Well control equipment consisting of 5000 psi W.P. pipe rams, blind rams, and annular preventer will be installed and is capable of handling maximum potential surface pressures. Diverter, BOPE and mud fluid system schematics on file with AOGCC. Hazards: H2S: H2S levels at Z-pad are generally low. H2S was last measured at Z-23 during 1990 to be 10 ppm before being shut in for the long term after October, 1990. Pore Pressure: Sadlerochit pore pressure in Zone 4 is expected to be 3850 psi at 8800' TVDSS or equivalent mud weight of 8.4 ppg. The maximum anticipated surface pressure assuming a gas gradient to surface of 0.1 psi/ft is 2970 psi. The Kuparuk interval in this area warrants attention. This zone typically has a pore pressure between 10.3 and 10.6 ppg. The planned window at 7475' MD is 540' TVD below the Kuparuk and the TOC behind the 9-5/8" is calculated to be between 3228' MD (gauge hole) and 5194' MD (50% washout over gauge hole). Since cement behind the 9-5/8" extends past the Kuparuk, no hazard of Kuparuk overpressure is expected. Lost Circulation: There are faults in the Kingak at 7950' and 8500' TVD SS which could develop lost returns, but their characteristics are unknown as there is no record of Z-23 penetrating either of them. Also, depth and positioning uncertainties are generally high in EWE seismic. In the reservoir, massive lost circulation occurred in Zone 2 when a fault was intersected at 9358' MD. This well profile has been specifically designed to avoid that fault. The original Z-23 well penetrated the Sadlerochit with 9.5 ppg, but the MW was soon reduced to 9.1 ppg to minimize the 2-4 bpm losses generated when the fault was encountered. RECEIVED APR -·4 1995 Redrill Plan Summary Alaska un & Gas Cons. Commission Page 2 Anchora :P ~~-. Z-23A INFORMATION Objective: The purpose of this ST is to abandon the present BHL, replace it with a BHL that establishes an new offtake point in the target area while avoiding a water-conductive fault, and run a 4-1/211 L-80 completion. The existing wellbore intersected a conductive fault in Zone 2, which led to immediate high water production (99.5%). Coiled tubing cement squeezing has been ineffective in reducing the water cut and the well has essentially been shut in since it was drilled. No further realistic wellwork options exist for the current bottom hole location. The proposed trajectory kicks off in the 9-5/811 casing, builds angle, then drops through the target area in a partial S-shape. A target location has been selected that should be suitable for a hydraulic fracture stimulation. Timing: Doyon 16 will be making a well-to-well move frorfl well Z-29 to Z-23 on or about April 15, 1995. Summary of Planned Operations 1. Squeeze perfs and lay cement plug. 2. Cut tubing above the packer. 3. Circulate to 9.0 ppg brine and freeze protect. 4. Move rig on location, pull tubing. 5. Mill window. 6. Lay kick off cement plug. 7. Drill 8.511 hole to proposed location. 8. Run open hole logs. 9. Run and cement 711 liner. Pressure test to 3000 psi. 10. Run 4.511 production tubing with 5 Camco KBG-2LS 4-1/211 x 111 gas lift mandrels, 711 packer, and 4.511 tailpipe w/Camco DB-6 3.5011 No-Go nipple. 11 . Move rig off location. 12. Run cement bond log. 13. Perf with E-line. Hydraulically Fracture. RECE\VEO f.\PR - 4 1995 " \@ on & Gas Cons. comm\ss\on ¡.\,\o.S ArlChora:p Redrill Plan Summary Page 3 ~ Z-23A SIDETRACK SUMMARY PROCEDURE 1. Pre-rig work: Pull SSSV. Dummy mandrels. Cut 3-1/2" tubing at 87201. Kill well. Freeze protect. Install BPV. 2. MIRU rig. 3. Pull BPV. Circulate out freeze protection fluid. Insure packoff has been tested. If not, have Drill Site Maintenance test packoff. 4. Set BPV. ND tree and tubing head adapter. 5. NU BOP's. Install tree test plug. Test BOPls to 5000 psi. Test annular to 250/2500 psi. Pull tree test plug and BPV. Note AOGCC witness or waiver on the morning report. 6. Pull and lay down 3-1/211 tubing. Note on the morning report the visual condition of the tubing. 7. TIH w/EZSV on DP & set same above stub. Squeeze perfs. Change packoff at this time if necessary. 8. RIH with a 9-5/811 section mill and displace well to Biozan milling fluid - spot 18 ppg hi-vis pill from EZSV to base of proposed 9-5/811 section. Cut a 45' section in the 9-5/811 casing starting at ±74751 md. 9. RIH with open-ended DP. Mix and pump a minimum of 180 sacks of cement to spot balanced kick-off plug from 100' below the base of the section to 200' above the top of the section. 10. RIH with 8-1/211 steerable drilling assembly and dress off cement to 51 below the top of section. Kickoff well and directionally drill to align well with target. 11. Drill with a 8-1/211 directional assembly to TD @ 95511 MD/9210' TVD. Multi-Shot survey w/Sperry-Sun ESS on final trip out of the hole for AOGCC survey requirements. 12. RU Atlas wireline and log with GR/CNUDIUBHCS. Run RFT's through LOC and below OOWC at approximately 101 intervals. Wiper trip. Note: If an extended period of time was needed to reach TD, a four arm caliper log may be run to calculate hole size for a more accurate cement volume. Caution should be used while running this tool because of the extra length (181). RECEIVED Redrill Plan Summary APR - 4 199~ ~,\~.ska Oil & Gas Cons. Commissit¡nage 5 ft. ""l"'Ihny:. n ~, 13. Run 711 29# L-80 standard liner assembly to TO with liner top packer and ±150' lap. Liner top packer and hanger assembly are to be plain 4140 grade carbon steel. Note: To ensure the 9-5/811 x 711 liner top packer is fully sheared and set, pressure up to 4200 psi when setting. 14. Cement liner with the standard sidetrack liner cement blend noted in the IIRecommended Sidetrack Practice Version 3.011. Note: Use 20% excess over caliper volume for open hole if the caliper log was run from TO to the 9-5/811 casing. If the log was not run from TD to the 9-5/8" casing use 50% excess over gauge hole volume. 15. Clean out liner to PBTD and test to 3500 psi. Change over to clean inhibited seawater. Test to 3500 psi for 30 minutes. 16. RIH with used 4-1/211.12.6#. L-80. TDS completion string wI Z" packer positioned ±200' md above top of Sadlerochit. 17. M/U 4-1/211 tubing hanger - test SSSV lines to 5000 psi for 10 mins. Orient SSSV balance line towards reserve pit. Land tubing hanger and RILDS. Test tubing hanger packoff to 5000 psi. 18. Back out & UD the landing joint. Set blanking plug. N/D BOPE. N/U tubing head adapter and 511 tree. Test control lines to 5000 psi. Test 511 tree and adapter to 5000 psi. Pull the test plug with a lubricator. 19. Pressure up on the tubing to 4000 psi to set the production packer. Maintain tubing pressure at 4000 psi for 30 minutes after setting packer and record as the tubing test. 20. Bleed off tubing pressure to ±1500 psi. Pressure test tubing x 9-5/811 annulus to 3500 psi for 30 minutes. Record the test on a Barton chart. Bleed off the annular pressure prior to bleeding off the tubing pressure. Bleed off the tubing pressure. 21. Pressure up to 2900 psi on the annulus to shear out the RP valve in the top GLM position. Displace the tubing wI enough diesel to freeze protect the annulus to 2200' tvd. Allow the diesel to U-tube to the tubing. RECE\\}£D APR. -> 4 1995 ;i,\ë.ska íjÜ & Gas cons~ Commission Anchoraf- Redrill Plan Summary Page 6 6600 6750 6900 7050 ì200 7350 B K 7500 8 7650 7600 7950 8100 8250 8400 8550 8700 8830 9000 9150 9300 o .~ -- ---- .---~ ) SHARED SERVICES ¡ ANADRfLl KA-D ! AÞP O~ED \ '....!. . i' .. KLÞi:Þlft,- -~~r - - - - - - - - t - - - - - - -:: - :ã ~ - - - - ... j - - - - -I ~.~ ~~ _I"\" - - - - ' - - - -'- -MAR.. ~- tv9~ - - - - - - - - - t Lí,;\,J; oo.:/J! \ 'I r ! \ INiTiAL S' \ I \ \ I \ \ ~ , \ , \ ~..~, \ DRILLING Z -23A (P02) VERTICAL SECTION, VIEW - I Sect ion at: 337.77 ïVD Scô]e ,; 1 lnch ;:: Oep ScaJe ,: 1 inch Drawn, , . . .: 03/29/95: 300 feet 300 feet \ \' WELL - Z-23A (PLAN 02) FROM TO MD MD 7480' 7829' { \ : \ 7829' 8876' I I -[i:--'--~--; ----- ----------.- , , . I; N;3:'K ¡:¡::J1 : . I I 8876' 9259' \ .\ ¡! ' . \ i ~-~~rl-----,---------~- \:--l- . . \ I ... -. - --,'-" .. . ,.... .. . - I I i . I jE--&~ì!-----;; ----------- ! 9259' 9551 ' ACTION KICK OFF. DROP & TUR~ LEFT 7°1100' DL FROM INC OF 35.06° TO INC ;OF 30.361>, . FROM AZ OF 23.13Q TO ÄZ'OF 337.77°, FROM 7374' TVD TO 7531' TVD DRILL T ANGËNT TO DROP PQIJiT ON INC OF 30.36°, ON AZ' OF:337.77°, FROM 7531' TVD TO 8575t TVD: DROP 4~J100 TO TARGET FROMINC OF 30.36° TO INC. OF 15.00°, ON AZ OF 337.77°, FROM 8575' TVD TO 8928' TVD DRILL TANGENT FROM TARvGET TO TD ON INC 15.00o,·ON AZ OF 337.77Q7 FROM TVD 8928' TO TVD 9210' -----L----------J. i j , "7>.- --:'::'=-~ - - - - .J - - - - - - - - - : : ~ '- - - - ,j - - \ - - J:.) 6281 1 . . '\ \ I ~ ; ... , I ___ ..... AP1- 4 1 9b . .1- , I ----- ----------¡----- : AJi.1.. ka Oil & as Cons. Commisston \ T~-Þ~r---~- -----~----- ---------- -~--- \ \ I \ , : \ ! 5~~~rn~~~T-- -----T----------------t---~-r--- ------1----- -----.---- sril.~ n:-1i1B~ - - - : - - - - - r - - - - ~ - - - - - ~ - - - - - - - - -.\ .. - - - - - - - - -1- - - - - - - - - -.- - - - . . . .. . - - -_.. ." _0 -J. .-! :~É~~~====·=::== ;==== ~=:::::::~ =====~=~=:=-===:;===== ========~~ ".r~c~~-'~, -rõ - - - - - - - - - - - - - - - - - - - - - - b - - - "" - - - - - - - - - - - - - - - - - - - ..n.';At+~\I ,j:!9!!w ësæ 'I \ ,-' i \, __~~_ ____J~~___ I \ ! -~~:~~ === : : : : : ., ~ ~ ~~ = ~ : : : : .,~ ~ ~.~ ~ ~. ~ ~ ~ ~ ~ f :.~~, ~ ~ ~ ~ : ~ ~ } : : : : :.~n: : ~ ~i.l~ ~ ~ ~~. z~1! ~/~ -I"~\ì.:r - - '. I I \: ' . \ . I , ~ ' , i ---------------------- ! . 150 300 r- ,-. i ___~______ _____ ___w ¡ - -- - - - - - T· - --~~·~-:::F- I _.1_..., . [A;'òOtj 1 j f::;j 93 Z2-3AP2 ô,. 52 3: OJ ~~ 'J . :'.. .... .j'; ":1' . ,.., r -;: 450 600 750 900 1050 1200 1350 1500 j650 3800 1950 2100 r Section Departure : ! d " : ~ ' ì.,· ,\ ï '. : .... I." I ~~, ') \ ~~- ) I SHARED SERVICES DRIULING Z -23A' : (P02) i PLAN ' VIEW I CLOSURE-.,...: 1355 feet at AZlmuth-355~53 DECL 1 NÅT iON. : 29,013 E SCALE. .!... _.: 1 jnch :: 200 feet; DRAWN. .;_ . . _ _: 03/29/95 I I Anadril1 Schlumberger 1700 1600 1'500 jdOO 1300 1200 1100 1000 ---. ,- Î' '..' I 900 I 800 700 '~' .- 0: 2 600 500 400 300 700: 500 I I I h1- I I I I 500; AOO ~J'JlI::1I'} H .[;; s.: 12JJ.n :L 52 3: 03 ),,,! ~) : , ~ '¡ . , ~': ~ ,: :;' .-::: i :.' ,.: :'; [: '.. "-1- T t,RGET ' r ' , I i ... ~oo -200- I· :. I: I . ·1 ~ M81'ker Ident H ication : MD N/S E/W Ai TIE~rN SURVEY 7359 A32 153 ~ B) TOP OF WiNDOW 7475 475 17j C) KOP CuRvE 7/100 7480 4/8 173 0} END 7iiOO CURVE ì829 6:05 179 Ë) DROP AliDO 8875 1 j ~5 21 F) END ..1/100 DROP 9.259 1281 77 G) TARGET-150 FT RADIUS 9255 1201 7ì H¡ TO 95:,1 1351 106 J~NADRI LL I AKA-OPC 150 F RADIUS : .... '" ..- I , , ....' ).:Xt 1:>f.1· . ._--. - ___..... I .- , i . ., I , ~/ . -',r:-- Ii / " , I 1 I: I; I: ----f¡ !: I; I ~ I· i: - I; 11 " " / " J / I I I , I I I I ì I I i , ¡ I , j ¡ I.. i ! I I ! I -. i-' I I I I I 1 i ~ " , :/ :1 ., " (:i~"'. Oil & G s Cons. Commissi n ¡~I(;.....I'\~ cora J ¡ : I; I; !: . I, . . I , r / / / ..--- 100 0 100 (- WEST : EAST -> 200 300 .!JOG 500 600 700 ,r ~ . ." , , . , STATE OF ALASKA \SKA Oil AND GAS CONSERVATION COMrv.AON APPLICATION FOR SUNDRY APPROVALS 1. Type of Request: Abandon -L- Suspend _ Operation Shutdown _ Re-enter suspended well _ Alter casing _ Repair well _ Plugging --X- Time extension Stimulate _ Change approved program _ Pull tubing _ Variance Perforate Other _ Pluç¡back for redrill 2. Name of Operator BP Exploration 3. Address P. O. Box 196612, Anchorage, Alaska 99519-6612 4. location of well at surface 720' SNL, 3213' WEL, SEC. 19, T11N, R12E At top of productive interval 4403' SNL, 2394' WEL, SEC. 18, T11N, R12E At effective depth At total depth 4242' SNL, 2312' WEL, SEC. 18, T11N, R12E 12. Present well condition summary Total depth: measured true vertical Effective depth: measured true vertical Casing Structural Conductor Surface Intermediate Production Liner Perforation depth: Length 82' 2621' 9089' 5. Type of Well: Development ..1L- Exploratory _ Stratigraphic _ Service 6. Datum elevation (OF or KB) KBE - 92 feet 7. Unit or Property name Prudhoe Bay Unit 8. Well number Z-23 (34-18-11-12) 9. Permit number 89-58 10. API number 50- 029-21950 11. Field/Pool Prudhoe Bay Field/Oil Pool (t,:::> \\ ;7 .'.:~/ , m "\:"~ I' \\ 9809 feet Plugs (measured) 9315 feet (BKB) 9704 feet Junk (measured) 9211 feet (BKB) Size Cemented Measured depth 20" 118' 13-3/8" 3684 cu ft Permafrost 2657' 9-5/8" 1894 cu ft Class G 9125' True vertical depth 118' 2657' 8663' 937' 5-1/2" 541 cu ft Class G 9809' measured 9468'-9509',9512'-9520' (Open) 9552'-9592' (Squeezed) 9315' RECEIVED true vertical 8990'-9029', 9033'-9040' (Open) 9070'-9108' (Squeezed) APR - 4 1995 Tubing (size, grade, and measured depth) 3-1/2" 9.2# L-80 to 8873' A\aska Oil & Gas Cons. Commission Anchorairp. Packers and SSSV (type and measured depth) Three CTC Formation Packers @ 9010'; 9427' and 9631'; SSSV @ 2075' 13. Attachments Description summary of proposal --X-- BOP sketch 14. Estimated date for commencing operation 4/10/95 16. If proposal was verbally approved Detailed operations program _ 15. Status of well classification as: Oil~ ,·<:Jl \\ Gas Suspended _ Name of approver Date approved Service 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Title Drilling En ineer Supervisor FOR COMMISSION USE ONLY Conditions of approval: N fy Commission so representative may witness Plug integrity _ BOP Test Location clearance Mechanical Integrity Test _ Subsequent form required 10- \ ,., _, \ ~:~ I \ \.!J Ù Approved by order of the Commission \\ Commissioner Form 10-403 Rev 06/15/88 ((, ' )) * - Jf~ Date Approval No. Date SUBMIT IN TRIPLICATE WELL PERMIT CHECKLIST COMPANY WELL NAME ~!J¿¡ Z-23A GEOL AREA ~~ UNIT# FIELD & POOL ADMINISTRATION 1L~ ENGINEERING APP ;;~ -- GEOLOGY (L~ Ç;~ð~fd IN IT CLASS LJ~ REMARKS 1. 2. 3. 4. 5. 6. , 7. 8. 9. 10. 11. 12. 13. Permit fee attached. . . . . . . . Y Lease number appropriate.. ...... Y Unique well name and number. . . . . . . . Y Well located in a defined pool. . . . . . . . . . . . . .Y Well located proper distance from drlg unit boundary. . .Y Well located proper distance from other wells. . Y Sufficient acreage available in drilling unit.. . . Y If deviated, is wellbore plat included . . . . . Y Operator only affected party. . . . . . . . . . . . .Y Operator has appropriate bond in force. . . . . . . . . .Y Permit can be issued without conservation order. . .. Y Permit can be issued without administrative approval. . .Y Can permit be approved before IS-day wait. . . . . . . . Y N N N N N N N N N N N N N 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. Conductor string provided. . . . . . . . . . . . .Y Surface casing protects all known USDWs . . . . . .Y CMT vol adequate to circulate on conductor & surf csg. . Y CMT vol adequate to tie-in long string to surf csg . . . Y CMT will cover all known productive horizons. . . . . . (!) N Casing designs adequate for C, T, B & permafrost. . . . f!> N Adequate tankage or reserve pit. . . . . . . . . . . . iN If a re-drill, has a 10-403 for abndnmnt been approved..Y N I~ ~ Adequate wellbore separation proposed. . . . . . . . . . Y N ~ If diverter required, is it adequate. . . . . . . . . . .~ I'f~ Drilling fluid p=ogram schematic & equip list adequate.6Þ N j). fl:::-. (~ BOPEs adequate. . . . . . . . . . . . . . . . . . . . .(f) N ~ BOPE press rating adequate; test to 5"~ psig.@ N U Choke manifold complies w/API RP-53 (May 84). . .. ~ /\fA- Work will occur without operation shutdown. . . . ~ N Is presence of B2S gas probable. . . . . . . . .~ N ~~ L/A-~ 30. Permit can be issued w/o hydrogen sulfide measures. .y.y N 31. Data presented on potential overpressure zones . . . . . Y 32. Seismic analysis 9f shallow gas zones. . . . . . . Y N 33. Seabed condition survey (if off-shore) .. N 34. Contact name/phone for weekly progress reports . . . Y N [exploratory only] /1 ~ r:J - GEOLOGY: ENGINEERING: BEW~ JDB~ . COMMISSION: DWJ~ RAD~ . TAB-"'~ Comments/Instructions: RP~ HOWljo - A:\FORMS\cheklist rev 03194 PROGRAM: exp [] II t;Sð dev [] redrl:Ç!( serv 0 ON/OFF SHORE o~ t:::::1 0 Z 0 1-3 ) ~ þj H 1-3 t:J:j H Z 1-3 ::r: H (J) (J) t-d Þ> (") t:j Well History File APPENDIX Information of detailed nature that is not particularly germane to the Well Permitting Process but is part of the history file. To improve the readability of the Well History file and to simplify finding information, information of this nature is accumulated at the end of the file under APPENDIX. No special effort has been made to chronologically organize this category of information. o (--- vL{) ~~~l( ~ t, :t .\\. /¡, I..' r" ~..\ ~ ." \< ":( ..~.. ':~", ~\:. ~f;;~ ::~ :.i:: :;.. ';1', '~':.' :~~. ~~. '~ ~;. * ~': ~ :ì~'~ ~v-:' .~. '¡~ ~: *' ·t' ~·t * * * y '" ',' r:. ; ,~' r I.: (_,' ': ':,' r::., r :~. ~ *~~+**.~~~~~*~*~***~*~**~~*~ ~~~~~~~~~~o~~~~~~~_~~~~~~~~~~~* i'" ,~ ~ ... ~ 1!(':t ""'" .-.. ;".) C" '\ ~ ~ , ~ ¡,:~ F ~ ~í, ~,.,; ì-,t ~."I .... "r.,!'I~ ."! ... ~ ~ ... * ~~~~~~~~~-~~~~~~~-~~~~~~.~~~-~* '~~ ~, ~~: :{," ~f' :.;f: :;.: :~~ *' 7..':, ~: '+ .~,~ ,~~.* :ii' :* .* '*: .~i" :-.~,. :~':, :.;¡: 1-. ~~ '*~ *" *: :t * RECEIVED JUN 2 6 1995 Alaska 011 & Gas Cons. Commis.s.io.n Anchorage ¡: P f, Y . " :~: 'I I 1"1 7-:/3/\ r> ),,~ r'¡ F; ~;. P" .~\ 'Y P I: S ,:1 (', I~ F' h L.,t /; !) {, - (1:2 ...1 "~; .... fl'! (1 :::, t F· Q I.W :E --- - W- e> ~ fL .. I I :IE "1'" ,A, ,,,:",: '\ ,;', ,'- .-' f i ". ,I 1 ,'" ~ ct- J ',1' :00 ~" ì' ,'-', ., ) ,..~: L~) ~,,~ .,~ ".' ..! \0'- ''':' 'I ' :< '. ~, \ ... l ' I'. / ..~ ~ ' t r: (' r' t:: : \' I.. ' L ~. .:.. ,L ,.., ..,..... , , ~: j I \':" ;':}~ ; (~ !' ,~~, ~. r- (:" ('" I.,. ,. ]..:: <' , C" ' , .' ! 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Atlas Wir·eline Services SEC 19 PERMANENT DATUM MEAN SEA LEVEL LOG MERSURED FROM R.K.S. DRILL. MEAS. FROM R.K.8. , DATE 2B-APR-95 RUN 1 SERVICE ORDER 169550 DEPTH DRILLER 9580' 1-- DEPTH LOGGER 9557' BOTTOM LOGGED INTERVAL 9554' !\Iashn Oi! ' . (~a~, CcrIIS. CUlllrni~:r:¡Î,q TOP LOGGED INTERUAL 7 4SØ' /\nr,l1ornqo .---------.---.----- --_._~--,._._"._-'-'.__._--,--,_.__._-- ------.----,-----.------,-.-.-... CASING - DRILLER 9 S/B" º7472' º CASING LOGGER 7465' BIT SIZE\ 8 1/2" -- TYPE FLUID IN HOLE LSND õ-ËÑs I TY/-DÏ sëos I TY----- -ïF-ø-'pp(~---r·5 3 S E C IQ'· PH I FLUID LOSS 10.0 METER 13.6cc '--- ~;OURCE OF SAMPLE CIRCULATED ___ f-, RM AT MEAS. TEMP. 1 .42 OHMM º 62 DEGF º ----.---------.------.-.-,-----,-- ---..---. -...------..---------- ---.------,-------- RMF f"1 r MEf"1S. TEMP. 1.7] OHMM 057 DEGF 0 .._. _.__·__,___~_R. _____._____________ ...__ _____ __.__.__". ,_.____._..____.~____~_ _ ______ _.__ ..__..."_" ."_.'.__.,._._ ._,__. _..,._ _. .___,....._~.__ RMC AT MEAS. TEMP. 1 .45 OHMM º 62 DEGF t) ·SOURCE' OF RMF/RMC- MËASURE!?==cBEAS~RED ----1----- RM AT BHT ø. 44 OHMM ~ 2Ø I DEGF º TIME SINCE CIRCULATION S.S HOURS MAX.. REC. TEMP. DEG. F 2Ø 1 ·ËQÜI~)'~-NO~-- / LOCATIOt,r-1ïL553¡---[-NOlfrH-SCOPË- ----....-J-------.. --_. ----- -------.----- ,-..----.-.-..,.-.- f----.---- -.------ ---. -- EECORDED 1J1_________________ B~JJ_~_l·,__~OE~tt______..____ _________________ WI TNE5SED BY B. DnWSON, B. CnMPBELL FILE NO. 6418.00 ~PI NO. SØ-029-219SØ-ØI 2"=-1"'0'/5"=100' FINAL PRINT COMPANY BP EXPLORATION (ALASKA) INC. WELL. ~ Z - 23A FIELD PRUDHOE BAY COUNTY NORTH SLOPE STATE ALASKA LOCATION: SUHFACE: 72.0' FNL &\1739' FWL 81 OlHER SERUICES 01 FL --GR-SP BHC/ AL·-'GR CN-Gf~ FMT ELEUAT[ON 0.Ø' FT. ELEVATIONS FT. ABOUE PERMANENT DA rUM KB 8 I . øø ' DF 79 . ø 5 ' GL 4 B . :3 6 ' PAD TWP IIN RGE 12E ~"...:¡ ,+....., r"'\ ~ 1,' t: ,,"'" ~., ~\ ,-,~"c~ V,.,} (\,~ Y ¡? 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" ,,'.(.: . ,~~ f:fJU1Ji2.NÕ._;-TocnTÚ5N,_ -~- ~RL G~~,ll ~·---~~lEQ.[1 H =$.'~ßpE"~ ==--==-=-=~~~I==I2,=-~:='~~-li:: RECORDED BY .. : ' R ~: ECÇ. 1.','KOENN ' . . " .;: :,~-.; WITNESSED BY _~__~; B~'DAìJSON .'·~i}'~fli1!~f(Ç[= -~-~-=~~--:==-.i=- ----'-1,1 ~ lYò 7'S--t/? rI&ií. WESTERN ATLAS DUAL INDUCTION FOCUSED LOG Gamma Ray / SP _,. _..n..__.._ _"._.._"_".'___" _,_._____.._,~. .__ ."_.____ "___.__ ___,....._._.'_~.._.. __,_"_,,_...~....___.___ Atlas Wi.·clinc Ser'vi{~cs rllE NO. 64'18.00 API NO. ~)Ø·-Ø2~)--21 9SØ-Ø I (~.. = I øø' /5" = I ø ø ' FINAL PRINT COMPANY BP EXPLORATION (ALASKA) INC. WEll l-23A / FIelD PRUDHOE BAY COUNTY NORTH SLOPE STATE ALASKA lOCATION: SUHFACE: 72Ø' FNL & 1739' FWL OTHER SERUICES FMT BHC/AL-GR CN'-GH SEC 19 fWP II N RGE 12E ELEUAT[ON ø.ø' FT. ELEUATIONS 81 FT. nSOUE PERMANENT DATUM ~~ ~~ : ~~: GL 4 B . 36' PAD DATE 28-APR--95 -D.L{=_ ~.V' ~w)- RUN I ~ \. L ,~ . 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