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Home My WebLink About201-028Imag~roject Well History File Cover I~e XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. ~ ~.[- _~ _~(~ Well History File Identifier Organizing R?CAN Color items: [] Grayscale items: [] Poor Quality Originals: [] Other: NOTES: DATA iskettes, No. I [] Other, No/Type BY: BEVERLY ROBIN VINCENT SHERYL~WINDY Project Proofing BY'. BEVERLY ROBIN VINCENT SHERYL~INDY OVERSIZED (Scannable) [] Maps: Other items scannable by large scanner OVERSIZED (Non-Scannable) [3 Logs of various kinds [] j Other ScanningPrep.ration __~ x 30 = .~.__ + ~ = TOTAL PAGES _~~ BY: BEVERLY ROBIN VINCENT SHERYL~INDY DATE ""7/~O~;;~/0~S/ V~ Production Scanning Stage 1 PAGE COUNT FROM SCANNED FILE: ~ PAGE. COUNT MATCHES NUMBER IN SCANNING PREPARATION: ~ YES BEVERLY'~INCENT SHERYL MARIA WINDY DATE.'~O,~'~,S! ~ BY: Stage 2 BY; IF NO IN STAGE 1, PAGE(S) DISCREPANCIES WERE FOUND: ~ YES (SCANNING IS COMPLETE AT THIS POINT UNLESS SPECIAL ATTENTION IS REQUIRED ON AN INDIVIDUAL PAGE BASIS DUE TO QUALITY, GRAYSCALE OR COLOR IMAGES ) ReScanned (indlvid~al page [,~pecial at~e,flo,J ~ca,n/,g i:omple~ed) RESCANNED BY; BEVERLY ROBIN VINCENT SHERYL MARIA WINDY DATE: lei NO NO General Notes or Comments about this file: Quality Checked 12/10/02Rev3NOTScanned.wpd e e (~, ....... , MICROFILMED 07/25/06 DO NOT PLACE ANY NEW MATERIAL UNDER THIS PAGE F:\LaserFiche\CvrPgs _ Inserts\Microfilm _ Marker. doc . (" STATE OF ALASKA ( ALASKA UIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG 1a, Well Status: 0 Oil 0 Gas 0 Plugged IBI Abandoned 0 Suspended 0 WAG 1b. Well Class: 20AAC25.105 20AAC25.110 IBI Development 0 Exploratory 0 GINJ 0 WINJ 0 WDSPL No. of Completions Zero Other 0 Stratigraphic 0 Service 2, Operator Name: 5. Date Comp., Susp" or Aband. 12. Permit Number BP Exploration (Alaska) Inc. 9/30/2003 201-028 ,/ 303-263 /" 3, Address: 6. Date Spudded 13. API Number P.O, Box 196612, Anchorage, Alaska 99519-6612 6/4/2001 50-029-21590-01-00 4a. Location of Well (Governmental Section): 7. Date T.D. Reached 14. Well Number Surface: 6/22/2001 PBU Y-23A /' 1372' SNL, 24' WEL, SEC. 33, T11 N, R13E, UM 8 EI t' '& t (. d' t KB OF t ) T f P d t' H ' . eva Ion In lee In lea e , , e c, 15 Field and Pool op 0 ro uc Ive onzon: -,', 3092' NSL 4307' WEL SEC 28 T11 N R13E UM RKB - 88.81 Prudhoe Bay Field / Prudhoe Bay , ,.", Pool Total Depth: 9. Plug Back Depth (MD+ TVD) 3346' NSL, 4695' WEL, SEC, 28, T11 N, R13E, UM 11781 + 8985 Ft 4b. Location of Well (State Base Plane Coordinates): 10. Total Depth (MD+TVD) 16. Lease Designation and Serial No. Surface: x- 644792 y- 5948883 Zone- ASP4 11748 + 8984 Ft ADL 028287 TPI: x- 640414 y- 5953265 Zone- ASP4 11. Depth where SSSV set 17. Land Use Permit: Total Depth: x- 640021 y- 5953512 Zone- ASP4 N/A MD 19, Water depth, if offshore 20. Thickness of Permafrost 18. Directional Survey 0 Yes IBI No N/A MSL 1900' (Approx.) 21. Logs Run: MWD, GR, RES 22. CASING, LINER AND CEMENTING RECORD CASING. . SETTING DEPTH HOLE SIZE WT. PER FT. GRADE Top BOTTOM . SIZE.. . CEMENTING RECORD., AMOUNT PULLED. 20" Surface 110' 26" 8 cu yds Concrete 13-3/8" 72# L-80 Surface 2817' 17-1/2" 3902 cu ft Permafrost 9-5/8" 47# L-80 Surface 10330' 12-1/4" 572 cu ft Class 'G' 7" 26# L-80TC4S 10053' 11124' 8-1/2" 400cuftClass'G' * 9.3#/6.2#/6.16# L-80 10222' 11781' 3-3/4" UncementedSlottedLienr * 3-1/2" x 3-3/16" x 2-7/8" 23. Perforations open .to Production (MP + TVD of T~p anct ,'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#, 13Cr 6995' - 10072' 9950' MD TVD MD TVD 25. ACID, FRACTURE, CEMENT SQUEEZE, ETC. . . . . DEPTH INTERVAL (MD) AMOUNT & KIND OF MATERIAL USED 10845' P&A w/ 22 Bbls Class 'G' / /' ~~ 9242' 2nd Plug, 26 Bbls Class 'G' /' \\~ 6946' Set EZSV . 6946' Set Whipstock / 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-Bel GAs-McF WATER-BBl CHOKE SIZE GAS-Oil RATIO TEST PERIOD + Flow Tubing Casing Pressure CALCULATED + OIL-Bel GAs-McF WATER-BBl Oil GRAVITY-API (CORR) Press. 24-HoUR RATE 27. CORE DATA DE7'r::I\ Iron Brief description of lithology, porosity, fractures, apparent dips and presence of oil, gas or water aft~ """......... .....e , '.necessary). Submit core chips; if none, state "none". JAN 0 7 2004 Non~"".\ f' /,~.(~\jc\Qrt:~[".\ !I B!10 CV.ì ~.;'.' 2n. O. ~ 0 C~) I G' I N A L Alaska Oil & Gas Cons. Commission d 1.\?i'th\D'(jð~Ib./ <:,.ßJf-~n~~ &~ ~"V_{J. l1f' . \ Anchorage .. . ú. n {UI Form 10-407 Revised 2/2003 CONTINUED ON REVERSE SIDE ~BFL ~r.:..- V'u £,1 ~ ", { 28, GEOLOGIC MARKERS 29. FORMATION TESTS Include and briefly summarize test results. List intervals tested, NAME MD TVD and attach detailed supporting data as necessary. If no tests were conducted, state "None", Sag River 11102' 8843' None Shublik A 11149' 8874' Shublik B 11214' 8913' Shublik C 11247' 8931' Sadlerochit I Zone 4 11306' 8956' Zone 45N 11366' 8969' Zone 45P 11385' 8971' RECEIVED JAN 0 7 2004 Alaska Oil & Gas Cons. Commission Anchorage 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 ~ Title Technical Assistant Date OJ. 0 (p.. tJ PBU Y -23A 201-028 303-263 Prepared By Name/Number: Terrie Hubble, 564-4628 Well Number Permit No. I A roval No. Drilling Engineer: Rob Tirpack, 564-4166 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: Classifieation of Service Wells: Gas Injection, Water Injection, Water-Alternating-Gas Injection, Salt Water Disposal, Water Supply for Injection, Observation, or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. ITEM 4b: TPI (Top of Producing Interval). ITEM 8: The Kelly Bushing 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 loeation 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', 0 RIG \ N A L Form 10-407 Revised 2/2003 (r (' l Well: Y-23B Accept: 10/22/03 Field: Prudhoe Bay Unit Spud: 10/26/03 API: 50-029-21590-02 Release: 11/11/03 Permit: 203-164 Rig: Nabors 2ES Date "...,..ww"""",......w,.,... ""." ,.. . .'W ,"" "'..w,, '..",WW'..""-,...".."..,..,..,.,.,."".._-,,w,..ww..-.._w...",..w",.",'.'."..'.'..'..""'..".'.'.' "'.'.'.'"".._w".w"",-""..'",.'--".'."w""."..'.,w'....'.""..'.'.,w,..w..,w'",.,'.' ,. "'."'.'" "".,,"..'."""'...'. w.""""^",.,.----"",.",,,...,^,,. PRE-RIG WORK 09/29/03 DRIFT WI 2.52 CENT & SAMPLE BAILER. TAG TOP OF 3 3/16" X 27/8" XO @ 11,128 SLM'. 09/30/03 BLEED DOWN & LOAD IA WI CRUDE. KILL WELL W/ 1% KCL. RIH W~" . TAG TD@11716'CTM.LOAD BACKSIDE W/ 150 BBLS CRUDE UNTIL POSITIVE WHP SEEN. PUM22 LS 15.8# CEMENT. UNABLE TO BUILD WHP. ESTIMATE - 8-9 BBLS BEHIND PIPE. PULL TO SAFETY.- ET POSITIVE WHP. WOC. 10/01/03 DROP 7/8" BALL, PUMP 10 BBL 1.5# BIO. JET TO 9900'. MAKE REPEAT PASS TO 9900'. JET OUT WI CRUDE. MAKE SLOW REPEAT PASSES ACROSS 7100'-6900' AND ACROSS GLM'S/SSSV NIPPLE. WASH TREE/BOP'S W/ WATER/METH. RDMO. 1 0/02103 = TAG HARD CEMENT TOP @ 1 ,73 ' LM. DRIFTED FOR CHEM. CUTTER TO 7,500' WLM WI 3.78 CENTRALIZER. ATTEMPTEQ .,. EST CEMENT PLUG, GAVE UP AFTER PUMPING APPROX. 9 BBLS W/ THE TRI-PLEX. T/I/O=280/13/360 MITTBG TO 1000 PSI, FAILED 3 TEST IN 15 MIN. EACH, TBG PRESSURE LOSSES=1ST TEST =720PSI, TOOK 2.5 BBLS TO BUMP UP, 2ND TEST =790PSI, TOOK 3 BBLS TO BUMP UP, 3RD TEST=820 PSI, PUMPED 8.7 BBLS CRUDE TOTAL DOWN TBG. FINAL WHP=180/18/360. 10/03/03 TIO=OIOIOI PPPOT-T PASSED, PPPOT-IC FAILED {PRE-RIG} BLED TUBING HANGER TEST VOID TO 0 PSI. PRESSURED TO 5000. 4700 IN 15 MINUTES AT 4700 AFTER 30 MINUTES. LDS WERE DONE ON 09-20-03. ALL LDS FUNCTIONED OK. PPPOT-IC FAILED PRESSURE WOULD BUILD TO 2000 AND BLED DOWN TO 1000. HAS BEEN PACKED WITH WKM IN PAST. WELL IS SET ON SLIPS. ALL LDS FUNCTIONED OK. BODY SEAL AND YB SHOULD BE CHANGED OUT RWO. PERFORM WEEKLY BOP TEST. MU/RIH 2.25" BDJSN W/ STINGER. WELLBORE TIGHT, TAKE RETURNS TO RIH. " 10/04/03 RIH TO 10,000'. CIRC WELL TO KCL. ATTEMPT INJECTIVITYTEST DOWN CT. LESS THAN 0.25 BPM @ 1000 PSI WHP. BLEED/FLUI K IA WI CR~~RC WELL TO CRUDE. BLEEDI FLUID PACK IA W/ CRUDE. TAG CEMENT TOP @ 08 'CTM. PUM 26 ßB'Ls 15.8# CLASS G CEMENT. LAY IN FROM 10835' TO 9250'. ESTIMATE 6 BBLS B D LINER TOP Bl::JfVlP TO 1000 PSI. JET DOWN TO 9250' WI 1.5# BIOZAN. WASH ACROSS 6900 TO 710 ÖR CHEM CU . "'ASH ACROSS GLM'S WHILE POOH. FP TO 2500'. TRAP 250 PSI AT SURFACE. CONTACT DSO, LEAVE WELL SI. 10/05/03 WELL SHUT IN ON ARRIVAL. DRIFTED WITH 3.76" GAUGE TO CEMENT TOP AT 9242' SLM. PRESSURE TUBING TO 1000 PSI. MONITOR 30 MIN. GOOD TEST. BLED BACK TO 50 PSI. NOTIFIED PAD OPERATOR OF WELL STATUS. 'X" Y-23B Pre-Rig Work for Sidetril\ Operations (" Page 2 10/09/03 PRIOR TO CHEMICAL CUT, RIH WITH TUBING PUNCHER TO EQUALIZE TUBING & IA AND STRING SHOT TO CLEAN THE PIPE. 9 HOLES PUNCHED FROM 6950'.6952' WITH MEDIUM CHARGES. STRING SHOT INTERVAL 6985'-6997'. USED TWO STRANDS OF 80 GR PRIMACORD. TUBING CUT @ 6995' WITH 3-5/8" CHC, 3-3/8" ANCHOR BODY. CHC RAN CENTRALIZED WITH THREE CENTRALIZERS. USED TWO 2X48 CHEMICAL CYLINDERS, 15" GRAIN CHARGE, DEVIATION AT CUT DEPTH - 44 DEG. 10/11/03 T/I/O= 2001350/380 CIRCULATE-OUT TUBING & FLOWLINE. WELL SHUT IN ON ARRIVAL. PUMPED DOWN IA; 5 BBLS NEAT MEOH, 349 BBLS SEAWATER,'150 BBLS DIESEL. SHUT IN WING & U-TUBE FOR 35 MINUTES. CMIT TXIA 2500 PSI PASSED. BLEEb T/I/O DOWN. FREEZE PROTECT FLOWLINE. FINAL WHP'S 010/150. 10/18/03 T/I/O=180/220/320. BLEED TBG, IA & OA (PRE-RIG); IA FL AT SURFACE, BLED IA FROM 220 PSI TO 20 PSI (5 BBLS OF FLUID). OA FL NEAR SURFACE, BLED OA FROM 320 PSI TO 30 PSI (GAS & 2 BBLS OF FLUID). TBG FL NEAR SURFACE, BLED TBG FROM 140 PSI TO 40 PSI. FINAL WHP'S=40/VAC/30. 10/19/03 T/I/O=BPV/VAC/60. BLEED OA (PRE-RIG); OA FL NEAR SURFACE, BLED OA FROM 60 PSI TO 0+ PSI (GAS & 1 BBL OF FLUID). FINAL WHP'S=BPVNAC/O+. 10/20/03 T/I/O=BPV/VAC/O+. MONITOR WHP'S POST BLEED (PRE RIG). ( ( BP EXPLORATION Page 1- Operations Summary Report Legal Well Name: Y -23 Common Well Name: Y -23B Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 10/18/2003 End: 11/11/2003 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 11/11/2003 Rig Name: NABORS 2ES Rig Number: 2 Date From - To Hours Task Code NPT Phase Description of Operations 10/21/2003 12:00 - 17:30 5.50 MOB P PRE Prep for move to V-pad, Move eamp, shop, and pit I pump module to V-Pad. 17:30 - 20:30 3.00 MOB P PRE Move sub structure from J-Pad to V-Pad, On location at 20:30 hours. 20:30 - 00:00 3.50 MOB P PRE Level location, Lay mats and Herculite. Spot sub base on Y-23. Lay Herculite. Spot pit I pump module, 10/22/2003 00:00 - 05:30 5.50 RIGU P PRE Spot sub base. Raise and pin derrick. Lay Herculite. Spot pit module, cuttings tank, and shop. Berm area around cuttings tank, pit module interconnect. RlU floor, bridle down, clean rig. 05:30 - 06:00 0,50 RIGU P PRE Pre spud safety and environmental meeting. Add 2.5 hours to rig acceptance time due to disassembly of BOP before release for summer maintenance shut down. (Rig Accepted at 08:00 10/22/2003). 06:00 - 07:00 1.00 RIGU P PRE Install secondary annulus valve. 0 psi on annulus and tubing. Well dead, 07:00 - 08:00 1.00 RIGU P DECOMP RlU DSM. Pull BPV with lubricator. 08:00 - 09:30 1.50 RIGU P DECaMP RlU lines to circulate out freeze protection diesel to cuttings tank. 09:30 - 12:00 2.50 WHSUR P DECOMP Test lines to 3,500 psi. Circulate out freeze protection at 5 bpm and 500 psi. Increase rate to 9 bpm and 950 psi. 12:00 - 13:00 1.00 WHSUR P DECOMP CIW dry rod in TWC. Test from below to 1,000 psi. No test. 13:00 - 16:00 3.00 WHSUR P DECOMP Call DSM. DSM delayed due to Nordic Rig 2 move. RIU DSM lubricator. Trouble pulling TWC. Drain tree. Retrieve rubber from seal. Pull TWC with lubrieator. cia and install TWC. Test from below to 1,000 psi. Good test. RID DSM. 16:00 - 18:00 2.00 WHSUR P DECOMP NID tree and adapter flange, Hanger threads, 4 1/2" TDS, checked, O.K. Function all LOS, O.K. 18:00 - 20:00 2.00 BOPSUf; P DECOMP N/U BOPE. 20:00 - 20:30 0.50 BOPSUf; P DECOMP RlU test joint. 20:30 - 23:30 3.00 BOPSUf; P DECOMP Test BOPE and all related valves to 250 psi low and 3,500 psi high. Witness of test waived by Lou Grimaldi of the AOGCC. 23:30 - 00:00 0.50 BOPSU¡:; P DECOMP RID test joint. 10/23/2003 00:00 - 01 :00 1.00 WHSUR P DECaMP RlU DSM and pull TWC with lubricator. 01 :00 - 02:00 1.00 WHSUR P DECOMP PJSM. M/U tubing hanger crossover and joint dp. Screw into tubing hanger. BOLDS. Pull hanger to floor with 100K string weight. No overpull. UD tubing hanger. 02:00 - 03:00 1.00 PULL P DECOMP RlU 41/2" tubing handling equipment. RlU Camco control line spooling equipment. PJSM. 03:00 - 06:00 3.00 PULL P DECOMP UD 4 1/2", 12.6#, 13Cr-80, TDS tubing from 7,000' to 4,785'. Recover BVN, 4 stainless bands, and 28 control line clamps. RID spooling unit. 06:00 - 10:00 4.00 PULL P DECOMP UD 41/2", 13Cr-80, TDS tubing from 4,785'. Recovered a total of 174 joints tubing plus 27.68' cut joint. 10:00 - 11 :00 1,00 PULL P DECOMP RID tubing equipment, clean and clear rig floor. 11 :00 - 12:00 1.00 BOPSUR P DECOMP RlU and test lower set of pipe rams to 250 psi low and 3,500 psi high, Install wear bushing, 12:00 -13:00 1,00 EVAL P DECOMP Service top drive, 13:00 -14:00 1.00 EVAL N WAIT DECOMP Wait on SWS. Printed: 11/12/2003 11 :00:18 AM (' ( BP EXPLORATION Page 2 - Operations Summary Report Legal Well Name: Y-23 Common Well Name: Y -23B Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 10/18/2003 End: 11/11/2003 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 11/11/2003 Rig Name: NABORS 2ES Rig Number: 2 Date From - To Hours Task Code NPT Phase Description of Operations 10/23/2003 14:00 - 17:00 3.00 EVAL P DECOMP PJSM. RlU SWS, RIH with 8.5" GRlJB. Tag tubing stump at 6,978' (WLM), POOH with GRlJB, Some scale recovered in junk basket. 17:00 - 18:00 1.00 EVAL P DECOMP RlU SWS firing head and HES 9 5/8" EZSV . Include CCL. 18:00 - 19:00 1,00 EVAL P DECOMP RIH with EZSV on SWS Eline. 19:00 - 19:30 0.50 EVAL P DECOMP Log into position with CCL. Casing collar located at 6,951' (WLM). Place top of EZSV at 6,946' (WLM). Initiate firing head. At 3 minutes 40 seconds, good surface indication of fire and plug set. Log Off@9 and back down to confinn bridge plug placement at 6 J>""(WLM). 19:30 - 20:00 0.50 EVAL P DECOMP POOH with SWS Efl . 20:00 - 20:30 0.50 EVAL P DECOMP RID SWS equipment. 20:30 - 22:00 1.50 BOPSU~ P DECOMP Pull wear bushing. NID BOPE. 22:00 - 00:00 2.00 WHSUR P DECOMP NID tubing spool. Remove 9 5/8" packoff. Install new 9 5/8" packoff. N/U new tubing spool. 10/24/2003 00:00 - 01 :30 1.50 WHSUR P DECOMP N/U new tubing spool. Pressure test packoff to 3,500 psi. Good test. 01 :30 - 03:30 2.00 BOPSUF P DECOMP N/U BOPE. 03:30 - 04:30 1.00 BOPSUF P DECOMP RlU and pressure test 9 5/8" casing to 3,500 psi for 30 minutes. Record test. 04:30 - 07:00 2.50 STWHIP P WEXIT PJSM. P/U and M/U whip stock assembly to 83'. Upload MWD and surface check. 07:00 - 08:30 1.50 STWHIP P WEXIT P/U BHA from 83' to 1,070'. 08:30 - 09:30 1.00 STWHIP N DFAL WEXIT Attempt to circulate. BHA plugged, 09:30 - 11 :00 1.50 STWHIP N DFAL WEXIT Drop rabbit. POOH with BHA from 1,070' to 83', 11:00 -14:00 3.00 STWHIP N DFAL WEXIT UD and flush tools. Found scale packed off in MWD pulser & starter mill. 14:00 - 16:00 2.00 STWHIP P WEXIT P/U BHA #2 to 45'. RIH to 320' with drill collars, circulate, RIH from 320' to 1,000' with 5" HWDP, circulate. A lot of scale coming back across shakers. 16:00 - 21:00 5.00 STWHIP P WEXIT P/U jars; P/U 4" drill pipe from 1,032' to 6,947'. Circulate 1 1/2 dp volume every 1,500'. P/U weight 155K, SIC weight 130K, Rot weight 145K Tag top of EZSV at 6,947', 21 :00 - 22:00 1.00 STWHIP P WEXIT Pump 30 bbl viscous spacer. Displace well to 9.5 ppg milling fluid at 220 spm and 1,500 psi. Some additional 'scale' intermittently coming across shakers during displacement. 22:00 - 00:00 2.00 STWHIP P WEXIT Pump dry job. POOH with drill pipe from 6,947' to 2,714'. 10/25/2003 00:00 - 01 :00 1,00 STWHIP P WEXIT POOH from 2,714' to 1,070' with drill pipe. 01 :00 - 02:30 1.50 STWHIP P WEXIT Handle BHA from 1,070'. 02:30 - 03:00 0.50 STWHIP P WEXIT M/U MWD and surface test. 03:00 - 03:30 0.50 STWHIP P WEXIT Orient MWD. M/U whip stock. 03:30 - 04:30 1.00 STWHIP P WEXIT Handle BHA to 1,070'. 04:30 - 07:30 3.00 STWHIP P WEXIT RIH with drill pipe from 1,070' to 6,946'. Fill pipe every 3,000'. P/U weight 150K, SIC weight 130K. 07:30 - 08:00 0.50 STWHIP P WEXIT Orient Whip Stock 67 deg LHS, set bottom trip anchor with 45K down weight. Shear off milling BHA from whip stock, 08:00 - 12:00 4.00 STWHIP P WEXIT Mill window in 9 5/8" casing. TOW at 6,923', BOW at 6,938'. Drill I mill to 6,956'. Torque on btm 5/7K, off btm 4K. Recovered -60 Ibs metal cuttings, 12:00 - 13:00 1.00 STWHIP P WEXIT Work window. Circulate sweep around. 13:00 - 13:30 0.50 STWHIP P WEXIT Perform FIT at 6,923' (5,750' tvd) with 9.5 ppg and 750 psi to Printed: 11/1212003 11 :00: 1 e AM ( ( BP EXPLORATION Page 3 - Operations Summary Report Legal Well Name: Y -23 Common Well Name: Y -23B Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 10/18/2003 End: 11/11/2003 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 11/11/2003 Rig Name: NABORS 2ES Rig Number: 2 Date From - To Hours Task Code NPT Phase Description of Operations 10/25/2003 13:00 -13:30 0.50 STWHIP P WEXIT 12,0 ppg EMW. 13:30 -14:00 0.50 STWHIP P WEXIT Pump dry job, monitor well. Blow down surface equipment. Remove blower hose. 14:00 -16:00 2.00 STWHIP P WEXIT POOH from 6,956' to 1,070' with drill pipe, 16:00 -18:00 2.00 STWHIP P WEXIT CIO handling equipment. POOH and handle BHA from 1,070'. Clear floor. Upper string mill full gauge. 18:00 - 19:00 1.00 DRILL P INT1 Pull wear bushing. Flush BOPE stack and function same. Install wear bushing, 19:00 - 22:30 3.50 DRILL P INT1 PJSM. M/U BHA #4 to 1,176', Upload MWD and surface test. 22:30 - 00:00 1,50 DRILL P INT1 P/U 5" drill pipe from 1,176' to 2,895', Fill pipe at 2,400'. 10/26/2003 00:00 - 02:30 2.50 DRILL P INT1 P/U 5" drill pipe (183 joints) from 2,895' to 6,895'. Adjust clock for Day light saving time. (3.5 hours operation) 02:30 - 04:00 1.50 DRILL P INT1 Slip and cut drilling line, Service top drive. 04:00 - 04:30 0,50 DRILL P INT1 Slack off and wash through window. No problems. Tag Undergau e hole at 6,946'. Ream UG hole to 6,956'. 6.50 DRILL P INT1 Directional drill from 6,956' to 7,365'. ART = 1.77 hrs, AST = 1.31 hrs, ADT = 3.08 hrs P/U weight 175K, SIC weight 140K, Rot weight 160 Slide I Rotate 409' (6,956' - 7,365') Slide at TF 65 to 85 LHS to initiate LH n to plan azimuth. Flow rate 575 gpm, on btm 2,150 , off btm 1,950 psi. WOB 10 - 12 K, ROP 150 fph Rotate at 80 RPM Flow rate 575 gpm, btm 2,450 psi, off btm 2,150 psi. Torque on btm 14K; Torque off btm 7K WOB 10 -1 ,ROP 150 - 200 fph 11 :00 - 11 :30 0.50 DRILL N RREP INT1 POOH fr 7,365' to 6,899'. Washout in fluid end of #2 pump. 11 :30 - 20:30 9.00 DRILL N RREP INT1 CIO uid end on #2 pump, Test to 3,500 psi. O,K. 20:30 - 21:00 0.50 DRILL N RREP INT1 from 6,899' to 7,365', Stage pumps up and wash last stand to bottom. 21 :00 - 00:00 3.00 DRILL P Survey. Directional drill from 7,365' to 7,586'. ART = 1.32 hrs, AST = 0.00 hrs, ADT = 1.32 hrs P/U weight 175K, S/O weight 140K, Rot weight 160K. Rotate 221' (7,365' - 7,586') Rotate at 80 RPM Flow rate 575 gpm, on btm 2,450 psi, off btm 2,150 psi. Torque on btm 12K; Torque off btm 8K WOB 10 -12K, ROP 150 - 200 fph 10/27/2003 7.50 DRILL P INT1 Directional drill from 7,586' to 8,261'. ART = 3.88 hrs, AST = 0.57 hrs, ADT = 4.45 hrs P/U weight 180K, SIO weight 135K, Rot weight 160K. Rotate/Slide 675' (7,586' - 8,261') Printed: 11/1212003 11:00:18AM STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION APPLICATION FOR SUNDRY APPROVAL 20 AAC 25.280 1. Type of Request: [] Abandon [] Suspend [] Operation Shutdown [] Perforate [] Vadance [] Other [] Alter Casing [] Repair Well [] Plug Perforations [] Stimulate [] Time Extension [] Change Approved Program [] Pull Tubing [] Perforate New Pool [] Re-Enter Suspended Well [] Annular Disposal 2. Operator Name: 4. Current Well Class: 5. Permit To Drill Number BP Exploration (Alaska) Inc. [] Development [] Exploratory 201-028/'"' 3. Address: [] Stratigraphic [] Service 6. APl Number: P.O. Box 196612, Anchorage, Alaska 99519-6612 50-029-21590-01-00 7. KB Elevation (ft): RKB - 88.81' 9. Well Name and Number: PBU Y-23A 8. Property Designation: 10. Field / Pool(s): ADL 028287 Prudhoe Bay Field / Prudhoe Bay Pool 11.. : ' . PRESENT,WELL CONDITION SUMMARY "T'otai DePih MD (fi): Total Depth TVD (fi): I EffeCtive Depth MD(fi): IEffectiv® Depth TVD' (fi): Piugs (meaSured): Junk (measured): 11781'. 8985' I 11748' I 8984' None None :.Casing:;:: .:.~ ::';:::: ,E:engt:h:.:; :: :'!.;. :,.'..:;:;..::~.:':;:.Sii~e:',;.:::: ::?.,:'::' ',::.:i,':?'!..,?:J:;;!;::!.'.M.:D..;:.;:!;i :;::: ,':;i.:,:,ii: :?,':', 'i' ::, ':.BUr:St,,; ; :..':::i .;. ::C0{:lapse::;.'.. Structural Conductor 110' 20" 110' 110' Surfa(;;;e 2817' 13-3/8" 2817' 2701' 4930 2670 Intermediate 10330' 9-5/8" 10330' 8310' 6870 4760 Production Liner 1071' 7" 10053'- 11124' 8117'- 8857' 7240 5410 Liner 1559' 3-1/2- x 3-3/16,, x 2-7/8- 10222'- 11781' 8235'- 8985' Perforation Depth MD (ft): I Perforation Depth TVD (ft):I Tubing Size: Tubing Grade: I Tubing MD (ft): 11368' - 11748' 8970' - 8984' 4-1/2", 12.6# 13Cr 10072' "Packers and SSSV Type: 9-5/8" x 4-1/2" Otis 'MHR' packer; Packers and SSSV MD (fi): 9950' 4-1/2" Otis SSSV Landing Nipple 2198' 12. Attachments: 13. Well Class after proposed work: [] Description Summary of Proposal [] BOP Sketch [] Detailed Operations Program [] Exploratory [] Development [] Service 14. Estimated Date for Commencing Operations: September 9, 2003 '''/ 15. Well Status after proposed work: [] Oil [] Gas [] Plugged [] Abandoned "i6. Verbal Approval: Date: [] WAG [] GINJ [] WlNJ [] WDSPL Commission Representative: 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Rob Tirpack, 564-4166 Printed Name,lBill~{,_~ ~ ~lsaacsc~n Title ...... Senior Drilling Engineer /-Z/ Prepared By Namo/Number:Hubble, 564-4628 Signature l~ ' ~,,,. Phone 564-5521 Date ~ ~.'~ Terrie ::: "". '.':.'. '" :" ::. '":': ~ . ':' .:' ·" '." :'.. ';'~.i.:..'!?' :":; :i: ...: :i. Comrnission':Useonly' '." ..... ...".... '...:.; . . :.'.."... ' ' Sundry Number: ._~0..3 Conditions of approval: Notify Commission so that a representative may witness I~Plug Integrity [] BOP Test [] Mechanical Integrity Test [] Location Clearance Other: Subsequent form required 10- ~-~ O'~ Approved By: ........ COMMISSIONER THE COMMISSION Date . Form 10-403 Revised 2/2003 / SEP ORIG Submit In Duplicate 0 bp To: From: Subject: Winton Aubert - AOGCC Date: September 2, 2003 Rob Tirpack- BPXA GPB Rotary Drilling Y-23A Application for Sundry Approval - P&A for Sidetrack Operations Approval is requested for the proposed P&A of PBU well Y-23A. This horizontal Ivishak Zone 4B producer has been shut-in since March 2003 due high water production and Iow oil production. Most recently, Y-23A failed a TIFL (hole in the tubing). The proposed horizontal sidetrack will target stranded Zone 4B reserves to the west, between P-01 and the exsistingY-23A. The sidetrack is planned as a 4270' MD sidetrack with ,,-'" a solid/slotted liner completion. ,~,' The Y-23B sidetrack is currently scheduled for Nabors 2ES beginning around 10/20/03, after completing the Q-07B sidetrack. The pre-rig work for this sidetrack will be priority scheduled immediately after the Application for Sundry is approved. Scope Pre-Riq Work: 1. Drift 3-3/16" liner to top of 3-3/161,'.X~-2':-77~' crossover. 2. P&A existing slotted liner witl~,20' bbl~J~ment from PBTD to ~9900' MD 3. Drift 4-1/2" tubing and tag top-~---c~ment. /' 4. Chemical cut the 4-1/2", 12.6#, 13Cr-TDS tubing at -7000' MD. ./" 5. Fluid pack T X IA with seawater and freeze protect same. 6. Function all lock-down screws. Repair or replace as needed. 7. Remove the well house. If necessary, level the pad. Please provide total well preparation cost on the handover form. Riq Operations: 1. MIRU Nabors2ES 2. Pull BPV. Circulate out freeze protection and displace well to seawater. Set TWC. 3. Nipple down tree. Nipple up and test BOPE. Pull TWC. 4. Pull 4-1/2" tubing from above pre-rig cut. 5. RU e-line. Run GR/JB for 9-5/8", 47# casing to top of tubing stub. 6. MU 9-5/8", 47# bridge plug on e-line with CCL. RIH and set at 6780' MD, set as needed to avoid cutting a casing collar. 7. Pressure test casing to 3500 psi for 30 minutes. 8. RIH with 9-5/8" Baker bottom trip whipstock assembly. Orient whipstock and set on bridge plug. 9. Swap over to 9.0 ppg milling fluid. 10. Mill window in 9-5/8" casing at 6760' MD, plus 20' past middle of window. Perform FIT. POOH. 11. MU 8-1/2" drilling assembly with Dir/GR and RIH. Kick off and drill the 8-1/2" intermediate interval, building and turning at 4°/100' to a 51° hold angle. Y-23A Application for Sundry 12. Increase mud weight to 9.8 ppg prior to cutting HRZ. 13. Increase mud weight to 11.4 ppg prior to cutting the Kingak. 14. Drill ahead to casing point at Top Sag River to an estimated depth of 11,916' MD. 15. Run and cement a 7" drilling liner throughout the 8-1/2" hole and back into the 9-5/8" casing to 6,610' MD. Displace cement with mud. POOH. 16. MU 6-1/8" BHA with Dir/GR/Res/ABI and RIH to the landing collar. 17. Pressure test wellbore to 3500 psi for 30 minutes. 18. Drill shoe track. Swap over to 8.6 ppg mud and drill 20' of new formation. Perform FIT. 19. Drill the 6-1/8" production interval building at 12°/100' to horizontal, targeting Z4B Ivishak. Drill ahead to an estimated TD of 16,186' MD 20. Run a 4-1/2" solid and slotted liner throughout the 6-1/8" wellbore and back into the 7" drilling liner to 11,766' MD. Release from TOL. 21. Displace well to clean seawater. 22. Run 4-1/2", 12.6#, L-80 completion tying into the 4-1/2" liner top. 23. Set packer and test the tubing to 3500 psi and annulus to 3500 psi for 30 minutes. 24. Set and test TWC. 25. ND BOPE. NU and test the tree to 5000 psi. 26. Freeze protect the well to -2200' and secure the well. 27. RDMO Post-Riq Work: 1. Install wellhouse and flowlines. 2. MIRU slickline. Pull the ball and rod / RHC plug from 'XN' nipple below the new production packer. 3. Install gas lift valves. Estimated Pre-rig Start Date: Estimated Spud Date: Rob Tirpack Operations Drilling Engineer 564-4166 09/15/O3 1 O/2O/O3 Y-23A Application for Sundry TRE = 4" CIW WELLHEAD = MCEV OY ACTUATOR = AXELSON KB. ELEV = 88.81' BF. ELEV = 37.6' KOP = 1600' Max Angle = 90 @ 11526' Datum MD = 11323' Datum TVD = 8800' SS 113-3/8 CSG, 72#, L80-BTRS, ID = 12.347" Id 2817' Y-23A 2198' SAFETY NOTES: CHROMETBG. WELL EXCEEDS 70° @ 11300' AND GOES HORIZONTAL @ 11526'. Id4-1/2" OTIS SSSV LANDING NIP, ID= 3.813" GAS LIFT MANDRELS IMinimum ID = 2.37" @ 11161' 3-3/16"X 2-7/8" XO ]TOPOF 7" LINER Id 10053' 4-1/2" TBG, 12.6#, 13Cr-TDS, .0152 bpf, ID = 3.958" Id 10072' 9942' 9950' 10010' 10022' 10027' 10059' 10072' I 10072' Id4-1/2" PARKER SWS NIP, ID= 3.813" Id9-5/8" x 4-1/2" OTIS MHR PKR, ID= 3.85" Id4-1/2" PARKER SWS NIP, ID= 3.813" I Id 3-3/4" BKR DEPLOY SLV, ID= 3.00"I Id 3-1/2" X 3-3/16" XO, ID= 2.80" Id4-1/2" PARKER SWN NIP, ID= 3.725" I--~4-1/2 PKR WLEG, ID= 3.958"I Id ELMDTT-LOGGED01/10/92 I 19-5/8"CSG, 47#, L80-BTRS, ID=8.681" Id 10330' PERFORATION SUMMARY REF LOG: INTEQ GR/RESIST 06/22/01 ANGLE AT TOP PERF: 83 @ 11368' Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL Opn/Sqz DATE 2-7/8" SLTD 11368- 11748 O 06/24/01 17" LNR, 26#, L80-TCA5, .0382 bpf, ID = 6.276" Id 11650' 7" MILLOUT WINDOW 11124' - 11130' 11161' I~ 3-3/16" X 2-7/8" XO, ID = 2.37" I 11368' I~ TOP OF 2-7/8" SLTDLNR, ID= 2.37" I 11748' H PBTD (PACKOFF BUSHING), ID [,. s,o, I-I ~ 781' I ,, ST,, H 74s' I = 1.25" DATE REV BY COMMENTS DATE REV BY COMMENTS 06/24/86 ORIGINAL COMPLETION 05/17/01 JM/TH CMT PLUG 12/27/91 RKH POST RWO COMPLETION 07/21/01 CH/TP CORRECTIONS 06/24/01 CTD SIDETRACK 08/12/01 PCR/KAK REMOVE CEMENTED PERFS 01/15/01 SIS-MD INITIAL REDRAW 08/16/01 GC/KAK PERFCORRECTIONS 05/16/01 RN/TP CORRECTIONS PRUDHOE BAY UNIT WELL: Y-23A PERMIT No: 201-028 APl No: 50-029-21590-01 1372' SNL & 24' WEL, Sec. 33, TN 11N, RGE 13E BP Exploration (Alaska) Y-23B Proposed ompletion 4-1/2" X Nipple - 2200' -- [13-S~8C~G ~ L~O-BE~ E)= 123¢7" ¢6 - ¢5] ¢4- ¢3- ¢2- ¢1- GLM DesicjLn_L 4-1/2" TBG, 126#, L-80 IBT, 0152 bpf, ID = 3.958" tTopof 7" 26# L-80 LINF~F'( Tubing Tail: -10' Pup Joint -X Nipple (3.81S") -'10' Pup Joint -Packer -20' Pup Joint -X Nipple (3,813") -20' Pup Joint -XN Nipple (3.725") -10' Pup Joint -WLEG I9-5/8" Whipstock - 6760' -- 9-518" CIBP - 6780' -- ICHEMFCA L CUT ITOP P&A CMNT 9-5t8" X 4-112" Packer - 9,950' -- 7" X 4-1/2" S-3 Packer - 11,716'] 4-1/2" Liner Ha nger/ZXP - 11,766'j 7", 26# Liner - 11,916'I LSolid and Slotted 4-1/2" Liner - 16,186'J Top of 3-3/16" Liner - 10,022' -- TOP OF 7" LtN~ PERFORATION SUMMARY REF LOG: INTEQ GR/RESIST 06/22/01 ANGLE AT TOP PDq. F: Note: Refer to Production DB for historical perf data iNTERVAL 11368 11748 7" LNR 26#, L80-TC45, .0382 bpf, ID %~:2~:']'J~ '~ iP&A'd 2-7/8" LNR DATE REW BY COMMEJ~TS 06/24/86 ~ ~)RIGINAL COMPLETIC 12/27/91RKH POST Iq'vVO COMPLE-f 06/24/01 CTD SIDETRACK 07/1B/03 PGS ProPosed ~g Sidetra~ IN COMMENTS PRUDHQE BAY UNFr WELL: Y-23B PE~MFF No: 201-028 APl NO: 50-029-21590-02 1372' SNL & 24' WF~, Sec 33, TN 11N, RGE 13E BP E.~ploratiorl (Alaska) Permit to Drill 2010280 MD 11781 -- TVD DATA SUBMITTAL COMPLIANCE REPORT 7/8/2003 Well Name/No. PRUDHOE BAY UNIT Y-23A Operator BP EXPLORATION (ALASKA) INC 8985 "'-' Completion Dat 6/24/2001 Completion Statu 1-OIL Current Status 1-OIL APl No. 50-029-21590-01-00 UIC N REQUIRED INFORMATION Mud Log N__9o Sample No Directional Survey Log Log Run Name Scale Media No DATA INFORMATION Types Electric or Other Logs Run: Well Log Information: Log/ Data Digital Digital Media Fmt I,E0 D GR Gamma Ray D Ind Induction/Resistivity --Eqg' D Ind Induction/Resistivity I F_~ D GR Gamma Ray D GR Gamma Ray D R R Directional Survey Directional Survey (data taken from Logs Portion of Master Well Data Maint) Interval Start Stop OH / Dataset CH Received Number Comments 1 11131 12733 Open 12/19/2001 Z,1~484 1 11120 11745 Open 12/19/2001 ~0~83 I 11131 12733 Open 12/19/2001 ~(0484 1 11120 11745 Open 12/19/2001 ~0483 1 10313 11781 Open 12/19/2001 "d'0485 FINAL ch 9/7/2001 FINAL ch 9/7/2001 Directional Survey Directional Survey Well Cores/Samples Information: Name ADDITIONAL INFORMATION Well Cored? Y / N Chips Received? Y / N Analysis Y / N R P. c~.iv~.d 9 Start Interval Dataset Stop Sent Received Number Comments Daily History Received? Y / N Formation Tops ~ N Compliance Reviewed By: Date: ( STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION REPORT OF SUNDRY WELL OPERATIONS 1. Operations performed: Operation shutdown_ Stimulate _ Plugging _ Perforate _ OA GEL TREATMENT Pull tubing _ Alter casing _ Repair well _X Other_ 2. Name of Operator BP Exploration (Alaska), Inc. 3. Address P. O. Box 196612 Anchorage, AK 99519-6612 5. Type of Well: Development _X Exploratory__ Stratigraphic__ Service_ 4. Location of well at surface 1372' FNL, 24' FEL, Sec. 33, T11N, R13E, UM At top of productive interval 2187' FNL, 4307' FEL, Sec. 28, T11 N, R13E, UM At effective depth 1942' FNL, 4663' FEL, Sec. 28, T11N, R13E, UM At total depth 1933' FNL, 4695' FEL, Sec. 28, T11N, R13E, UM (asp's 644792, 5948883) (asp's 640414, 5953265) (asp's 640053, 5953504) (asp's 640020, 5953512) 12. Present well condition summary Total depth: measured true vertical 11781 feet Plugs (measured) 8985 feet 6. Datum elevation (DF or KB feet) RKB 89 feet 7. Unit or Property name Prudhoe Bay Unit 8. Well number Y-23A 9. Permit number / approval number 201-028 10. APl number 50-029-21590-01 11. Field / Pool Prudhoe Bay Oil Pool Effective depth: measured true vertical 11748 feet Junk (measured) 8984 feet Casing Length Conductor 110' Surface 2779' Intermediate 10292' Liner 1071' Slotted Liner 1559' Size Cemented Measured Depth True Vertical Depth 20" x 30" 72 cf concrete 148' 148' 13-3/8" 3902 cf PF 2817' 2701' 9-5/8" 572 cf Class 'G' 10330' 8310' 7" 400 cf Class 'G' 10053' - 11124' 8117' - 8858' 3-1/2"x2-7/8" Uncemented 10222' - 11781' 8235' - 8985' Perforation depth: measured Slotted Liner from 11368' - 11748' true vertical Slotted Liner from 8970' - 8984' Tubing (size, grade, and measured depth) RECEIVED Packers & SSSV (type & measured depth) JUL 1 2002 4-1/2", 12.6#, L-80, TBG @ 9950' MD. Tubing Tail @ Anch0ra~e 9-5/8" x 4-1/2" Otis MHR Packer @ 9950' MD. 4-1/2" Otis SSSVLN @ 2198' MD. 13. Stimulation or cement squeeze summary Intervals treated (measured) (see attached) Treatment description including volumes used and final pressure 14. Prior to well operation 07/01/2002 Subsequent to operation 11/01/2001 OiI-Bbl 28O Representative Daily Averaqe Production or Iniection Data Gas-Mcr Water-Bbl 2952 2681 276 2680 2966 Casing Pressure Tubing Pressure 371 371 15. Attachments Copies of Logs and Surveys run __ Daily Report of Well Operations __ 16. Status of well classification as: Oil_X Gas__ Suspended__ Service 17. I hereby certify that the foregoing is~true and correct to the best of my knowledge. DeWayne R. Schnorr Form 10-404 Rev 06/15/88 · ORIGINAL Date Julv 11,2002 Prepared by DeWayne R. Schnorr 564-5174 SUBMIT IN DUPLICATE Y-23A DESCRIPTION OF WORK COMPLETED NRWO OPERATIONS 07/01/2002 ANN-COMM (AC-EVAL AND REPAIR): AC-BLEED 07/07/2002 ANN-COMM (AC-EVAL AND REPAIR): AC-BLEED; AC-EVAL 07/08/2002 ANN-COMM (AC-EVAL AND REPAIR): AC-LOAD; GEL TREATMENT EVENT SUMMARY 07/01102 PREP FOR OA LOAD. BLED OA FROM 1020 PSI TO 60 PSI. (LOW OA FL PROJECT). 07/07/02 T/I/O: SI/1960/450 BLEED OAP FOR GEL BENTONITE SQUEEZE. INITIAL IA FL @ 930' (55 BBLS). BLED lAP FROM 450 PSI TO 80 PSI IN 4 HOURS. MONITOR lAP FOR 30 MINUTES WITH NO CHANGE IN PRESSURE. FINAL WHP's = SI/1960/80 (McEVOY HANGER) O7/O8/O2 PUMPED 14 BBLS GELLED DIESEL LOADED WITH 2500# 100 MESH SAND, 20 BBLS GELLED DIESEL LOADED WITH 1700# BENTONITE AND 10# CELLOFLAKE DOWN OA. DISPLACED WITH 15 BBLS CLEAN DIESEL. LEFT WELL SHUT-IN. FLUIDS PUMPED BBLS 13 GELLED DIESEL LOADED W/6 PPA 100 MESH SAND (2500#) 20 GELLED DIESEL LOADED W/2 PPA BENTONITE (1700#) 18 DIESEL 0.5 FRESH WATER 51.5 TOTAL Page I TREE= 4"CIW SAFETY NOTES: CFROMETBG. WELL ^x., y - 23A HORIZONTAL @ 11526'. 'KB. ELEV = 88.81' BF. ELEV = 37.6' KOP = 1600' Max An~lie = 90 (~ 11526' O r H I DatumMD= 11323' I 2198' 4-1/z' OTISSSSV LANDING NIP, ID '-3.813" DatumTVD = 8800' SS; 113-3/8CSG, 72#, L80-BTRS, ID212.347" H 2817' ~ ~, GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH FORT DATE 6 3203 2904 43 CAMCO F~ 1/4" 07/01/01 5 5782 4832 42 CAMCo F~ 20164" 07/01/01 I, 4 7598 6152 43 CAMCO R~ DV 03/lS'01 Minimum E) = 2.37" @ 1 1161'~ 3 8762 7023 39 CAMCo F~ DV 03/18/01 2 9456 7573 37 CAMCO RK DV 03/18/01 3-3/16"X 2-7/8" XO 1 9915 7929 43 CAMCo RK DV 03/18/01 I ·' I ' 9942' H4-1/2" PA RKER SWS NIP, ID = 3.813" I X X I I I I I' 10022' H3-3/4"BKRDEPLOY SLV, ID=3.00"I I 10027' ~-~3-1/2"X3-3/16"XO, ID=2.80"I I ,' ,I 10050' H4-1/2" P^RKERSWN NIP, ID =3.725" I 4-112" TBG, 12.6#, 13Ct-IDS, .0152 bpf, ID = 3.958" 100'/2' I / I 100'I2' 4-1/2 Pm Wkm, D = 3.058" I 1°°72' H ELMDTT-LOGGED01/10/92 I 7" MILLOUI' WINDOW 11124'- 11130' PERFORATION S urv~VIARY ANGLEAT TOPPEF~: 83 @ 11368' Note: Refer to Production DBfor historical perf data SIZE SR: INYERV^C Opn/Sqz DATE ~,~ 11308' HTOPOF2-7/8"SLTDCN~ ID=2.37" I I 117"LNR'26#'L80.TC45''0382bpf'ID=6'27~'l'-I 11050' I 12-7/8" SCTD LN~ 6.16#, L-80 STL, .0058 bp*, ~D= 2.37' I DATE REV BY COMMmTS DATE REV BY COMIVENTS PRUDHOE BAY UNIT 06/24/86 ORIGINAL COMPLETION 05/17/01 JM/TH CMTPLUG WELL: Y-23A 12/27/91 RKH POST RWO COrvPLEFION 07/21/01 CH/TP CORRECTIONS PERMIT No: 201-028 106/24/01 CTD SIDETRACK 08/12/01 PCR/KAK REMOVECBVlENTED PERFS APINo: 50-029-21590-01 01/15/01 SIS-MD INITIAL REDRAW 08/16/01 GC/KAK PERFCORRECTIONS 1372' SNL & 24' WEL, Sec. 33, TN 11N, RGE 13E 05/16/01 RN/TP CORRECTIONS BP Explo ration (Alas k a) SIZE SPF INTERVAL Opn/Sqz DATE 2-7/8" SLTD 11368- 11748 O 06/24/01 DATE REV BY COMMI~ITS DATE REV BY COMrvENTS 06/24/86 ORIGINAL COMPLETION 05/17/01 JM/TH CMTPLUG 12/27/91 RKH POST RWO COrvPLEFION 07/21/01 CH/TP CORRECTIONS 06/24/01 CTD SIDETRACK 08/12/01 PCP,/KAK REMOVECBVlENTED PERFS 01/15/01 SIS-MD INITIAL REDRAW 08/16/01 GC/KAK PERFCORRECTIONS 05/16/01 RN/TP CORRECTIONS Transmittal Form Baker Atlas To: State of Alaska, Alaska Oil & Gas Conservation Commission 333 West 7t~ Avenue, Suite 100 Anchorage, AK 99501 Attention: Lisa Weepie Reference: Y-23APB 1 Prudhoe Bay Unit Contains the following: 1 LDWG format disk 1 listing 1 set films (3 films: GR MD, Resistivity MD and TVD) 1 set prints (3 prints: GRMD, Resistivity MD and TVD) LAC:16188 BAKER HUGHES Canada GEOSciences Centre Sent Iuliana Craiciu Received B Date: Dec 12, 2001 Date: PLEASE ACKNOWLEDGE RECEIPT BY SIGNING & RETURNING OR FAXING YOUR COPY FAX: (403) 537-3767 Baker Atlas #1300, 401-9n Ave. S.W. Calgary, Albert a, Canada T2P 3C5 Direct: (403) 537-3752 FAX: (403) 537-3767 RECE{VE ~}EC 1 9 2001 A~aska Oil & Gas Cons, Transmittal Form BAKER HUGHES Baker Atlas Canada GEOSciences Centre To: State of Alaska, Alaska Oil & Gas Conservation Commission 333 West 7t~ Avenue, Suite 100 Anchorage, AK 99501 Attention: Lisa Weepie Reference: Y-23A Prudhoe Bay Unit Contains the following: :~ ... :; 1 LDWG fonrtat disk ~'. .~ 1 listing .: 1 set .films (3 films: GR MD, Resistivity MD and TVD) 1 set prints (3 prints: GR MD, Resistivity MD andTVD) LAC.16187 Sent By: Iuliana Craiciu Received ~ ~ Date: Dec 12, 2001 Date: PLEASE ACKNOWLEDGE RECEIPT BY SIGNING & RETURNING OR FAXING YOUR COPY g'~g~f~_iZl~lgF3 FAX: (403)537-3767 Baker Atlas #1300, 401-9th Ave. S.W. Calgary, Albert a, Canada T2P 3C5 Direct: (403) 537-3752 FAX: (403) 537-3767 DEC 1 9 2001 Alaska Oil & Gas Cons. Commission Anchorage Transmittal Form Baker Atlas To: State of Alaska, Alaska Oil & Gas Conservation Commission 333 West 7th Avenue, Suite 100 Anchorage, AK 99501 Attention: Lisa Weepie Reference: Y-23APB2 Prudhoe Bay Unit Contains the following: Canada GEOSciences Centre Date: Dec 12, 2001 1 LDWG format disk 1 listing 1 set films (3 films: GR MD, Resistivity MDand TVD) 1 set prints (3 prints: GR MD, ResistivitY MD and TVD) LAC:16189 Sent By: Iuliana Craiciu Received ~~. ', /~O~t~,._ ) Date: PLEASE ACKNOWLEDGE RECEIPT BY SIGNING & RETURNING OR FAXING YOUR COPY FAX: (403) 537-3767 RECEIVED DEC 1 9 2001 Alaska 0il & Gas Cons. Commission Anchorage Baker Atlas #1300, 401-9th Ave. S.W. Calgary, Albert a, Canada T2P 3C5 Direct: (403) 537-3752 FAX: (403) 537-3767 ', ' STATE OF ALASKA ' ALASKA OIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG 1. Status of well Classification of Service Well OIL [] GAS [---I SUSPENDED I~l ABANDONED r-] SERVICE ~". 2. Name of Operator 7. Permit Number BP Exploration (Alaska), Inc. ~ 201-028 3. Address~ 8. APl Number P. O. BOX 196612 Anchorage, AK 99519-6612 50-029-21590-01 4. Location of well at surface ~:'..'~,i~i~,;:~i ...... ~_-...- : 9. Unit or Lease Name ,.' 1372' FNL, 24' FEL, Sec. 33, T11 N, R13E, UM (asp's 644792, 5948883) ~ 3/?- .... , Prudhoe Bay Unit At Top Producing Interval ~~i' 10. Well Number 2187' FNL, 4307' FEL, SEC 28, T11N, R13E, UM (asp's 640414, 5953265~~,.-,, i" Y-23A At Total Depth-~.~ ......... ~ .' 11. Field and Pool 1933' FNL, 4695' FEL, SEC 28, T11 N, R13E, UM (asp's 640020, 5953512) Prudhoe Bay Field 5. Elevation in feet (indicate KB, DF, etc.) 16. Lease Designation and Serial No. RKB 88.81 feetI ADL 28287 Prudhoe Bay Oil Pool 12. Date Spudded 13. Date T.D. Reached 14. Date Comp., Susp. Or Aband. .I 15. Water Depth, if offshore 16. No. of Completions June 4, 2001 June 22, 2001 June 24, 2001I N/A feet MSL 1 17. Total Depth (MD + TVD) 18. Plug Back Depth (MD + TVD) 19. Directional Survey 120. Depth where SSSV set 21. Thickness of Permafrost 11781' MD / 8985' TVD 11748' MD / 8984' TVD YES [] No [~]I 2198' feet MD 1900' (approx) 22. Type Electric or Other Logs Run MWD GR & GR/Resistivity 23. CASING, LINER AND CEMENTING RECORD SETTING DEPTH MD I CASING SIZE WT. PER FT. GRADE TOP BOTTOM HOLE SIZE CEMENTING RECORDI AMOUNT PULLED 20" 0 0 Surface 110' 26" 8 yards Concrete 13-3/8" 72# L-80 Surface 2817' 17-1/2" 3902 cubic ft PF 9-5/8" 47# L-80 Surface 10330' 12-1/4" 572 cubic ft Class G 7" 26# L-80TC4S 10053' 11124' 8-1/2" 400 cubic ft Class G 3-1/2" x 3-3/16" 9.3#/6.2#/ L-80 10222' 11781' 3-3/4" uncemented (slotted liner) x 2-7/8" 6.16# 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) (2-7/8" Slotted Liner, run in Zone 4 ) 4-1/2" 12.6# 13CR 10072' 9950' 11349' - 11748' MD; 8967' - 8984' TVD 26. ACID, FRACTURE, CEMENT SQUEEZE, ETC. DEPTH INTERVAL (MD) AMOUNT & KIND OF MATERIAL USED (See Sidetrack Summary for details) 27. PRODUCTION TEST Date First Production Method of Operation (Flowing, gas lift, etc.) July 2, 2001 Gas Lift Date of Test Hours Tested Production for OIL-BBL GAS-MCF WATER-BBL CHOKE SIZE IGAS-OIL RATIO I 7/4/2001 4.0 Test Period > I 3137 Flow Tubing Casing Pressure Calculated OIL-BBL GAS-MCF WATER-BBL OIL GRAVITY - APl (corr) Press. -304 psi 24-Hour Rate > 263 825 3204 28. CORE DATA Brief description of lithology, porosity, fractures, apparent dips and pressence of oil, gas or water. Submit core chips. * This 10-407 is submitted as directed per the 10-401 form approved February 20, 2001 (Permit #201-028) RECEIVED A itr, ~ "', _0~1 Form 10-407 AUG '[ plicate Rev. 7-1-80 ORIGINAL. CONTINUED ON REVERSE SIDE Alaska 0ii & Gas COns. Commission Anchorage ~9. . '. [, 30. GEOLOGIC MARKERS FORMATION TESTS NAME Include interval tested, pressure data, all fluids recovered and MEAS. DEPTH TRUE VERT. DEPTH gravity, GOR, and time of each phase. Top of Sag River Sand 11102' 8843' Top of Shublik A 11149' 8874' Top of Shublik B 11214' 8913' Top of Shublik C 11247' 8931' Top of Sadlerochit (Zone 4) 11306' 8956' Top of Zone 45N 11366' 8969' Top of Zone 45P 11385' 8971' 31. LIST OF ATTACHMENTS Summary of Y-23A CT Sidetrack Drilling Operations + End of Well Survey (including 2 plugbacks) + Updated Schematic. 32. I hereby certify that the following is true and correct to the best of my knowledge. Signed - Title AD&W Coiled Tubinq Enqineer Date A~t;ta]r Sherwood J '~ '- '~,...,""'~v T..~ INSTRUCTIONS Prepared by Paul Rauf 564-5799. 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 $: 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 the interval reported in item 27. Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval. Item 21: Indicate whether from ground level (GL) or other elevation (DF, KB, etc.). Item 23: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 27: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-in, Other-explain. Item 28: If no cores taken, indicate "none". Form 10-407 WELL"HEAD = '. MCEVOY KOP = 1600' 'MaX Angie = 90 @ '1'i52'6; Datum MD = 11323' Datum WU '= 8800' SS 113-3/8CSG'72#'L80-BTRS'ID=12.347'' Id 2817' Minimum ID = 2.37" @ 11161' 3-3/16"X 2-7/8" XO ITOPOF7" LINER Id 10053' 4-1/2" TBG, 12.6#, 13Cr-TDS, .0152 bpf, ID = 3.958" Id 10072' Y-23A 2198' 9942' 9950' " I 10010' --t 10022' 10027' 10059' 10072' SAFETY NOTES: CHROME TBG. WELL EXCEEDS 70° @ 11300' AND GOES HORIZONTAL @ 11526'. Id4-1/2" OTIS SSSV LANDING NIP, ID= 3.813" I GAS LIFT MANDRELS Id4-1/2" PARKER SWS NIP, ID= 3.813" I Id9-5/8" x 4-1/2" OTIS MHR PKR, ID= 3.85" I Id4-1/2" PARKER SWS NIP, ID= 3.813" 1--13-3/4'' BKR DEPLOY SLV, ID: 3.00"I Id3-1/2" X 3-3/16" XO, ID= 2.80" Id4-1/2" PARKER SWN NIP, ID= 3.725" Id4-1/2 PKRWLEG, ID= 3.958"I I 10072' Id ELMD'I-I'- LOGGED 01/10/92 I DATE 07/01/01 07/01/01 03/18/01 03/18/01 03/18/01 03/18/01 19-5/8" CSG, 47#, L80-BTRS, ID = 8.681" I--[ 10330' PERFORATION SUMMARY REF LOG: SWS-BHCS ON 06/17/86 ANGLE AT TOP PERF: 79 @ 11349' Note: Refer to Production DB for historical perf data SIZE I SPF I INTERVAL I°pn/sqz I DATE I 2-7/8' ISLTDI 11349-11748 I O 106/24/01I 7" LNR, 26#, L80-TC45, .0382 bpf, ID = 6.276" Id 11650' 7" MILLOUT WINDOW 11124' - 11130' I 11161' I-I3-3/16"x2-7/8"xo, ID=2.37"I 11349' I-~ TOP OF 2-7/8" SLTDLNR, ID= 2.37" I I 11748' I~PBTD(PACKOFF BUSHING), ID = 1.25" " - ,, I-I I I=-,~,, SLTD 1NR, 6.16#, L-80 STL, .0058 bp', lO= 2.37" I-I 11748' I DATE REV BY COMMENTS DATE REV BY COMMENTS 06/24/86 ORIGINAL COMPLETION 05/17/01 JM/TH CMT PLUG 12/27/91 RKH POST RWO COMPLETION 06/24/01 CTD SIDETRACK- 01/05/01 SlS-SLT CONVERTEDTO CANVAS 07/21/01 CH/TP CORRECTIONS 01/15/01 SIS-MD INITIAL REDRAW 05/16/01 RN/TP CORRECTIONS PRUDHOE BAY UNIT WELL: Y-23A PERMIT No: 201-028 APl No: 50-029-21590-01 1372' SNL & 24' WEL, Sec. 33, TN 11N, RGE 13E BP Exploration (Alaska) BP EXPLORATION Page 1 of 1 Final Well/Event Summary Legal Well Name: Y-23 Common Well Name: Y-23A Event Name: REENTER+COMPLETE Start Date: 6/1/2001 End Date: 6/12/2001 DATE TMD 24 HOUR SUMMARY 6/1/2001 (ft) Rig down & move rig from Y-32L1 to Y-23. 6/2/2001 (ft) Completed rig move. N/U & test BOPE. 6/3/2001 11,118.0 (ft) Installed WOC. Displaced out FP. Drilled lo/hi-side cmt ramp. 6/4/2001 11,118.0 (ft) Mill & dress 3.8" window in 7" liner fl11124' t/11130'. 6/5/2001 11,162.0 (ft) Dressed window. Drill build section to 11162'. Had orienter failure. 6/6/2001 11,517.0 (ft) Completed builld section @ 11,420'. Drill lateral section to 11517'. 6/7/2001 11,591.0 (ft) Drilled to 11,600. P/U res. tool. Repair depth counter. RIH, log up. 6/8/2001 11,745.0 (ft) Drilled to 11,745'. POOH f/bleed sub. RIH, MWD failed, POOH. 6/9/2001 11,423.0 (ft) Troubleshot MWD, new pulser fl town. RIH, confirmed ST @ 11,423'. 6/10/2001 12,085.0 (ft) Drill lateral section fl 11,423-12,089'. POOH f/motor. Test BOPE. 6/11/2001 12,114.0 (ft) Completed BOPE test, cut 100' of coil. Drill to 12,114', severe losses 6/12/2001 12,336.0 (ft) Drilled to 12,508', severe losses @ 12,508'. Drill to 12,550'. 6/13/2001 12,550.0 (ft) Drilled thru fault to 12,550'. Treated severe losses. 6/14/2001 12,575.0 (ft) Dress 11,408' area, drill to 12,575' & treat severe losses. 6/15/2001 12,733.0 (ft) Treated losses, POOH, cut coil. RIH & drill w/severe losses to 12,728 6/16/2001 12,733.0 (ft) Drilled to 12,733', treated severe losses, cleanout to run bridge plug 6/17/2001 11,180.0 (ft) Set BP 611815', top @ 11,805. Pump cement plug. Started BOPE test. 6/18/2001 11,291.0 (ft) Troughing. Time drilling as per program. Confirmed ST@ 11,186'. 6/19/2001 11,291.0 (ft) Lost returns. Drill to 11291 w/o returns. Pump LCM pills w/o success 6/20/2001 11,385.0 (ft) Drill to 11385' w/o returns. Finish build up section. 6/21/2001 11,658.0 (ft) Drill to 11658'. POH to change motor. 6/22/2001 11,781.0 (ft) TD well @ 11781'. Log off w/resistivity tool. 6/23/2001 11,781.0 (ft) Ran slotted liner w/o problems. FP 62000'. 6/24/2001 11,781.0 (ft) Secure well. Rig down. Printed: 8/10/2001 11:49:16 AM BP EXPLORATION Page 1 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/1/2001 02:30 - 12:00 9.50 MOB P PRE PJSM. General rig down & preparations to move rig from Y-32L1 to Y-23. Cranes to be used for exception move. 12:00 - 14:00 2.00 MOB P PRE Move pits off of Y-32L1. Lift out coil trailer with crane. 14:00 - 15:00 1.00 MOB P PRE Move scissor trailer and sub off of Y-32L1. 15:00 - 16:00 1.00 MOB P PRE Lay mats for spotting sub on Y-23. 16:00 - 17:00 1.00 MOB P PRE Attempt to spot sub over Y-23. Observe location sinking and very unlevel due to snowmelt soil softening. 17:00 - 18:00 1.00 MOB P PRE Move sub and remove mats. Crib cellar box solid. 18:00 - 21:30 3.50 MOB P PRE Fill cellar with cribbing while DSM relevel pad. 21:30 - 23:30 2.00 RIGU P PRE Spread herculite & set mats for sub. Spot and level sub. Remove gooseneck. 23:30 - 00:00 0.50 RIGU 3 PRE Set scissor sub mats and spot same. 6/2/2001 00:00 - 01:00 1.00 RIGU 3 PRE R/U cranes. Set coil trailer on scissor sub. R/D cranes. 01:00 - 02:30 1.50 RIGU 3 PRE Spot tool trailer, gen trailer, gen skid, mech shop, catwalk, 3arts conex & BHI trailer. 02:30 - 05:30 3.00 RIGU 3 PRE Spot pits & boiler trailer. Spread herculite for pumps. Set pump mats. Spot pumps with cranes. 05:30 - 06:00 0.50 RIGU 3 PRE Start hooking-up mud lines and berming. 06:00 - 08:00 2.00 RIGU 3 PRE Work on berms and clean-up Y-32L1 location. 08:00 - 10:00 2.00 RIGU 3 PRE Raise scissor trailer & coil tower. 10:00 - 13:00 3.00 RIGU ~ PRE Raise derrick. Scope-up derrick. Raise catwalk. 13:00 - 16:30 3.50 RIGU 3 PRE RIG ACCEPTED @ 13:00 HRS on 6/2/01. PJSM. N/U BOPE. 16:30 - 19:00 2.50 RIGU 3 PRE R/U & test DSM lubricator. Pull BPV & install 2WCV. RID DSM lubricator. 19:00 - 19:30 0.50 BOPSUF.P DECOMP PJSM. R/U to test BOPE. 19:30 - 22:00 2.50 BOPSUF.N HMAN DECOMP lWhile liquid packing the stack & choke manifold, observed KCL water leak via the suction valve on the mud pump (LCIR# 2001-LCIR-27666). Cleaned up spill. 22:00 - 00:00 2.00 BOPSUF,P DECOMP Pressure tested BOPE as per AOGCC regulations. Witnessing of test waived by State Rep Chuck Scheve. Test pump not working, thus testing with mud pump. 6/3/2001 ~00:00 - 04:00 4.00 BOPSUF:P DECOMP Continue pressure testing BOPE. 04:00 - 06:00 2.00 BOPSUF:P DECOMP R/U & test DSM lubricator. Pull 2WCV. Well static. RID lubricator. 06:00 - 09:00 3.00 RIGU P PRE Cut 60' of coil. Weld on 3.125" OD coil connector, pull test & pressure test, OK. Meanwhile carried out ASA - satisfactory performance. 09:00 - 09:30 0.50 RIGU P PRE Pressure test master valve against blind/shear rams & confirmed it leaking - bleed down to 750psi in 5 mins. 09:30 - 10:00 0.50 RIGU P PRE Held pre-operations start-up safety meeting with day crew. Discussed recent LCIRs, hipos and fatality on competitor rig. Stress adherence to procedures, HNHM & good communication. Reviewed scope of Y-23A planned activities & highlighted potential for lost circulaton. 10:00 - 11:00 1.00 RIGU P PRE M/U MHA & nozzle BHA#1. 11:00 - 12:00 1.00 RIGU P PRE RIH BHA#1 to 2200' displacing out FP fluid from wellbore/coil with KCL. 12:00- 12:30 0.50 RIGU P PRE POOH 1: 1. 12:30 - 12:45 0.25 RIGU P PRE OOH. L/D BHA#1. 12:45 - 13:00 0.25 RIGU P PRE Install coil reel bumper plate for preventing kinking coil while racking back or during unitentional reel movement. 13:00 - 14:00 1.00 STWHIP P WEXlT M/U cement mill BHA#2. 14:00 - 15:30 1.50 STVVHIP P WEXlT RIH BHA#2 to 2500'. Slit orienter & MWD - OK, getting 3 for 3 Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page~2 of 13 Operations Summa Report legal Well Name: Y-23 ~Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/3/2001 14:00- 15:30 1.50 STWHIP P VVEXlT clicks. 15:30 - 18:00 2.50, STWHIP P WEXlT Continue RIH BHA#2 and tag SVVN @ 10043'. Adjust depth to the ELM 10059'. Up Wt = 37k; Down Wt = 29k. 18:00 - 19:00 1.00 STWHIP N DPRB WEXIT Attempt to sync MWD signals. Getting a lot of possible pump noise. 19:00 - 19:30 0.50 S-I'WHIP P WEXIT Held after action spill review with night crew & discussed recent spill, other LCIRs & hipos. Re-stress adherence to procedures, HA/HM & good communication. 19:30 - 20:00 0.50 STWHIP P WEXIT Mill thru SWN & make two passes with/without pumps - no restrictions. 20:00 - 21:00 1.00 STWHIP P VVEXIT Sync MWD signals & continue RIH BHA#2 to 10410'. 21:00 - 22:35 1.58 STVVHIP P WEXlT Log GR tie in from 10410' to 10481'. PUH & relog from 10320' to 10370' (-1' correction). 22:35 - 22:50 0.25 STWHIP P WEXIT Continue RIH BHA#2 and tag TOC @ 11100'. 22:50 - 23:20 0.50 STWHIP P WEXIT Orient TF to LS. 23:20-23:30 0.17 S'I'WHIP P WEXIT Mill soft cementto from 11100'to 11110'with 2.6bpm/50psi 'dp / 180 TF / lk WeB / 60fph ReP. 23:30- 00:00 0.50 STWHIP P WEXIT Mill hard cement from 11110' to 11118' with 2.6bpm / 275psi dp / 180 TF / 2k WeB / 40fph ReP. 6/4/2001 00:00 - 00:10 0.17 S'I'WHIP P WEXIT Orient TF to HS. 00:10-00:25 0.25 STWHIP P VVEXlT Mill hard cement(hi-side ramp) from 11118'to 11126'with 2.6bpm / 300psi dp / 10L TF / 2k WeB / 24fph ReP. 00:25 - 01:00 0.58 STVVHIP P WEXIT Pump 10 bbls bio sweep. 01:00 - 03:30 2.50 STWHIP P WEXIT Paint EOP flag @ 10200' & POOH BHA#2. Monitor well @ 500' - OK. Continue POOH. 03:30 - 04:00 0.50 STWHIP P WEXIT OOH. L/D BHA#2. 04:00 - 04:30 0.50 STVVHIP P WEXIT M/U window mill BHA#3. 04:30 - 06:45 2.25 STWHIP P WEXIT RIH BHA#3 to 500'. SHT orienter & MWD - OK. Continue RIH. 06:45 - 07:15 0.50 STWHIP P WEXIT Tie into EOP flag (+23' correction). Continue RIH. 07:15-07:25 0.17 STVVHIP P WEXIT OrientTFto60L. 07:25 - 07:40 0.25 STVVHIP P WEXIT RIH dry & tag several times @ 11116'. 07:40 - 09:00 1.33 STVVHIP P WEXIT PUH to 10310 & tie into GR marker (-4' correction). 09:00 - 09:05 0.08 STWHIP P WEXIT Orient TF to 180LS. 09:05-09:20 0.25 STWHIP P WEXIT RIH dry&tag @ 11115'. 09:20 - 09:30 0.17 STVVHIP P WEXIT PUH & orient TF to 60L. 09:30-09:50 0.33 STWHIP P WEXIT RIH dry&tag @ 11115'. 09:50 - 10:00 0.17 STVVHIP P WEXIT Re-orient TF to 30L. 10:00 - 10:20 0.33 S'I'WHIP P WEXIT RIH dry & tag @ 11124'. Check TF - 10L. Flag pipe & P/U 1' to 11123'. 10:20 - 19:00 8.67 STWHIP P WEXIT Pump 10bbl bio sweep. Commenced extended time milling schedule. Lock down brake for 1 hr @ 11123' & each successive 10th of a foot as per program. TF remained HS to 15R-15L throughout. Significant metal shavings back at shakers. 19:00-20:00 1.00 STVVHIP P WEXIT On formation @ 11131'. TOW@ 11124' & BOW@ 11130'. Drilled fromation to 11141'. Pump 10 bbl biozan pill & recovered 95% cement & traces of formation sand/chert. 20:00 - 23:30 3.50 STWHIP P WEXIT POOH window exit BHA#3. Log GR tie-in (-6' correction). Paint EOP flag @ 10200'. Monitor well - OK. Continue POOH & monitor well @ 500' - OK. 23:30 - 00:00 0.50 S'I'WHIP P WEXIT OOH. L/D BHA#3. Inspected mill - wear marks indicate that center line was crossed. 6/5/2001 00:00 - 00:30 0.50 S'I'WHIP P WEXIT M/U window dress BHA#4 with crayola mill. Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page,3 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/5/2001 00:30 - 01:00 0.50 STWHIP P WEXlT Service & blow thru micro-motion in opposite direction of flow. 01:00 - 02:55 1.92 S'DVVHIP P WEXlT RIH BHA~4 to 2500'. SliT orienter & MWD - OK. Continue RIH. 02:55 - 03:00 0.08 STVVHIP P WEXlT Tie into EOP flag (+79' correction). Continue RIH. 03:00 - 04:00 1.00 STWHIP P WEXlT Tie into GR marker (+3' correction). Continue RIH. 04:00 - 04:15 0.25 STWHIP P =WEXlT Orient TF to HS. 04:15 - 05:30 1.25 STWHIP P WEXlT RIH & stacked out @ 1118'. PUH. RBIH & stacked out (~ 11124'. PUH checked TF - 15L. RBIH @ 0.5bpm & continue to stack out @ window. PUH 10'. RBIH 1' above tag. Bring pumps up. RBIH & continue to stall out @ window. 05:30 - 08:15 2.75 STWHIP P WEXlT Dress/drift window @ various TFs & make several backream passes with & without pumping. Swap hole to recycled FIo-Pro mud. 08:15 - 11:00 2.75 STWHIP P WEXlT POOH window dress BHA#4. Paint EOP flag @ 10200'. Continue POOH & monitor well @ 500' - OK. 11:00 - 12:00 1.00 STVVHIP P WEXlT OOH. L/D BHA#4. Inspected crayola mill - wear marks indicate successful dry passes thru window. 12:00 - 13:00 1.00 DRILL P PROD1 M/U build/turn drilling BHA#5. 13:00 - 15:00 2.00 DRILL P PROD1 RIH BHA#5 to 500'. Slit orienter & MWD - OK. Continue RIH. 15:00 - 15:10 0.17 DRILL P PROD1 Tie into EOP flag (+122' correction). Continue RIH. 15:10 - 16:10 1.00 DRILL P PROD1 Tie into GR marker (+0' correction). Continue RIH. 16:10 - 16:30 0.33 DRILL P PROD1 Orient TF to 60L. Continue RIH without pumps & tag up @ 11139'. 16:30 - 18:00 1.50 DRILL P PROD1 Drill from 11139' to 11156' with 2.6bpm / 200psi dp / HS&35L TF / 2k WOB / 1 lfph ROP. Observe TF flopping around like we're inside casing or orienter failure. 18:00 - 18:15 0,25 DRILL P PROD1 Orient TF to 30-60L. 18:15 - 19:00 0.75 DRILL P PROD1 Drill from 11156' to 11162'. TF still flopping. 19:00 - 19:50 0.83 DRILL P PROD1 Orient TF to 30-60L several times with TF flopping. However, btms-up samples indicate with 60% formation. Decide to POOH to inspect BH^. 19:50 - 22:30 2.67 DRILL N DF^L PROD1 POOH BHA#5. Paint EOP flag @ 10200'. Continue POOH & monitor well @ 500' - OK. 22:30 - 23:30 1.00 DRILL N DF^L PROD1 OOH. L/D BH^#5. Inspected M09 Bit - no major wear marks to indicate milling against casing. Suspect orienter failure. Changeout orienter & MWD battery. 23:30 - 00:00 0,50 DRILL N DFAL PROD1 RIH BHA#5 to 500'. SHT orienter & MWD - OK. Continue RIH. 6/6/2001 00:00 - 01:30 1.50 DRILL N DFAL PROD1 RIH BHA#6 to 2500'. SHT orienter & MWD - OK. Continue RIH. 01:30 - 01:35 0.08~ DRILL N DFAL PROD1 Tie into EOP flag (+32' correction). Continue RIH. 01:35 - 02:55 1.33, DRILL N DFAL PROD1 Tie into GR marker (-1' correction). Continue RIH. 02:55 - 03:15 0.33 DRILL N DFAL PROD1 Continue RIH & tag up @ 11162'. Orient TF to 30-40L. 03:15-04:00 0.75 DRILL P PROD1 Drill to 11186' with 2,6bpm / 200psi dp / 30L TF / 2k WOB / 36fph ROP, Reactive to 70-80L TF. 04:00 - 05:15 1.25 DRILL P PROD1 1 click & drill to 11235' with 2.6bpm / 200psi dp / 40L TF / 2k WOB / 39fph ROP. 05:15 - 06:35 1.33 DRILL P PROD1 1 click & drill to 11278' with 2.6bpm / 190psi dp / 25L TF / 2k WOB / 32fph ROP. 06:35 - 07:20 0.75 DRILL P PROD1 Drill to 11300' with 2.6bpm / 150psi dp / 30-55L TF / 2k WOB / 29fph ROP. 07:20-10:00 2.67 DRILL P PROD1 Orient to 60L & drill to 11400' with 2.6bpm / 250psi dp / 60L TF / 2k WOB / 44fph ROP. 10:00-10:40 0.67 DRILL P PROD1 Drill to 11420' with 2.6bpm / 500psi dp / 70L TF / 2k WOB / Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 4 of 13 Operations Summar Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/198(~ Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/6/2001 10:00 - 10:40 0.67 DRILL 3 PROD1 30fph ROP. 10:40 - 14:00 3.33 DRILL 3 PROD1 POOH BHA#6 for lateral motor. Paint EOP flag @ 10200'. Continue POOH & monitor well @ 500' - OK. 14:00 - 15:00 1.00 DRILL = PROD1 OOH. L/D BHA#6. M/U lateral drilling BHA#7 without BHI USMPR tool. 15:00 - 17:30 2.50 DRILL = PROD1 RIH BHA#7 to 2500'. SHT orienter & MWD - OK. Continue RIH. Tie into EOP flag, add 27' corrrection. 17:30 - 18:30 1.00 DRILL = PROD1 Log gamma tie in, subtract 1' correction. 18:30 - 20:45 2.25 DRILL = ; PROD1 Tag @ 11,420', orient TF to 70-80L. Only getting 1 out of every 3-4 clicks. 20:45 - 21:00 0.25 DRILL ~ PROD1 Drill ahead f/11,420'-11,432'. 2.5 bpm @ 4400 psi. 200-250 dp on motor w/drilling, 30-40 fph ROP. 21:00 - 21:30 0.50 DRILL N SFAL PROD1 MWD problems, (surface), short trip to window & sort out same. 21:30 - 00:00 2.50 DRILL P PROD1 Drill ahead f/11,432'-11,517'. 2.5 bpm @ 4300 psi freespin. 200-300 dp on motor, 35-55 fph ROP. WOB 2-4K. TF 80L. Changing out to new FIo Pro. 6/7/2001 00:00 - 01:45 1.75 DRILL P PROD1 Drill ahead f/11,517'-11,600'. No fluid losses w/drilling. New mud swap completed. However, CT circulaing pressure still too high. Suspect orienter faulty. 01:45 - 05:30 3.75 DRILL N WAIT PROD1 POOH to pick up resistivity tool. Flag EOP @ 10,200'. Monitor well @ 500'. 05:30 - 10:30 5.00 DRILL N WAIT PROD1 OOH. L/D BHA#7. M/U lateral drilling BHA#8 with BHI USMPR tool. 10:30 - 12:30 2.00 DRILL N WAIT PROD1 RIH BHA#8 to 500'. SHT MWD & resistivity - OK. Observe depth counter discrepancy. 12:30 - 14:00 1.50 DRILL N RREP PROD1 Change out and calibrate depth counter. 14:00 - 16:30 2.50 DRILL N WAIT PROD1 RIH BHA#8 checking depth every 2000'. SHT orienter ~ 2500' - OK. Continue RIH. Tie into EOP flag, -12' corrrection. 16:30 - 17:30 1.00 DRILL N WAIT PROD1 Tie into GR marker (+3' correction). 17:30 - 19:45 2.25 DRILL N WAIT PROD1 Continue RIH, stack out @ 11,300'. Unable to get thru, have to ream thru @ same TF as drilled. Tight again @ 11,330', & 11,560'. Tag @ 11,579'. 19:45 - 23:00 3.25 DRILL N WAIT PROD1 Log up f/11,579'-11,150'. 23:00 - 23:15 0.25 DRILL P PROD1 Orient TF to 80L. 23:15 - 00:00 0.75 DRILL P PROD1 Drill ahead f/11,579'-11,591'. Motor stalling w/200 psi dp. Increase pump rate to 3 bpm. 500 psi stalls. 6/8/2001 00:00 - 00:30 0.50 DRILL P PROD1 Orient TF to 90L. 00:30 - 03:15 2.75 DRILL P PROD1 Drill ahead f/11,600-11,711'. Average ROP, 45 fph. WOB, 2K. 3700 psi freespin, 100-200 dp on motor @ 3 bpm. 03:15 - 03:30 0.25 DRILL P PROD1 Get a click 03:30 - 04:30 1.00 DRILL P PROD1 Drill ahead to 11,745', stalling w/100-150 psi dp on motor, very weak. Decision made to POOH f/motor. 04:30 - 07:15 2.75 DRILL N DFAL PROD1 POOH BHA#8. Paint EOP flag @ 10200'. Continue POOH & monitor well @ 500'- OK. 07:15 - 08:30 1.25 DRILL N DFAL PROD1 OOH. L/D BHA#8. Observed washed out bleed sub with broken jet which caused very Iow dp on motor. 08:30- 08:45 0.25 DRILL N DFAL PROD1 M/U lateral drilling BHA#9. 08:45 - 10:30 1.75 DRILL N DFAL PROD1 RIH BHA#9 to 2500'. SHT orienter & MWD - OK. Continue RIH. 10:30 - 13:00 2.50 DRILL N RREP PROD1 Repair main hydraulic system clutch pack. 13:00 - 14:15 1.25 DRILL N DFAL PROD1 Continue in hole, subtract 22' @ EOP flag. 14:15 - 15:00 0.75 DRILL P PROD1 Log gamma tie in, add 4'. Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 5 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 I Rig Name: CDR-1 Rig Number: 1 Date FrOm - To Hours Activity Code NPT Phase Description of Operations 6/8/2001 15:00 - 16:00 1.00 DRILL 3 PROD1 Ream tight spot @ 11,150', work thru, OK. Tag up @ 11,405'. 16:00 - 18:00 2.00 DRILL P PROD1 Orient & attempt to ream down @ 11,405'. Uanble to work thru @ various toolfaces. 18:00 - 20:15 2.25 DRILL N DFAL PROD1 MWD tool not decoding properly, weak pulse signals. Troubleshoot same, unable to correct ...... unable to decode signal w/pipe moving. 20:15 - 23:15 3.00 DRILL N DFAL PROD1 POOH, EOP flag @ 9200', monitor well @ 500'. 23:15 - 00:00 0.75 DRILL N DFAL PROD1 CIO MWD. 6/9/2001 00:00 - 01:00 1.00 DRILL N DFAL PROD1 Continue to cio BHA. 01:00 - 03:45 2.75 DRILL N DFAL PROD1 Work on USMPR & MWD probe. 03:45- 04:30 0.75 DRILL N DFAL PROD1 RIH w/BHA#10 04:30 - 06:15 1.75 DRILL N DFAL PROD1 Shallow hole test, no good. Weak pulses & noise interference. Check all surface equipment, clean screens, move transducer, replace cable, try other pump, check pulsation dampner, no solution. 06:15 - 07:00 0.75 DRILL N DFAL PROD1 POOH 07:00 - 08:30 1.50 DRILL N DFAL PROD1 L/D BHA #10, reprogram MWD to 1.5 data rate. 08:30 - 09:30 1.00 DRILL N DFAL PROD1 RIH to 500', unable to detect pulses, POOH. 09:30 - 18:15 8.75 DRILL N DFAL PROD1 Trouble shoot MWD. Unable to detect pulses @ surface, tear down tool. No new pulsers on the slope, have (1) shipped up f/ town. Overhaul tool, pulser in tool is washed out. M/U tool w/ pulser from 1st run. RIH to 500' & 2500', pulses better in strength, but stilll only 5-7 psi. New pulser is on slope, POOH. 18:15 - 20:15 2.00 DRILL N DFAL PROD1 OOH, LID tool, replace pulser & BHI electrical specialist determines bad solenoid driver module, replace same. M/U BHA #11. 20:15 - 23:15 3.00 DRILL N DFAL PROD1 RIH, shallow hole test, OK. 25 psi pulses, decoding properly. Continue in to 2500' & test orienter, all OK. Continue in hole, correct @ EOP flag, subtract 23'. 23:15 - 00:00 0.75 DRILL N DFAL PROD1 Log tie in w/gamma, add 5' correction. 6/10/2001 00:00 - 00:30 0.50 DRILL P PROD1 Continue in hole, tag @ 11,423'. This is the area of transition f/ build to lateral we had trouble getting thru, and believe we may have sidetracked during our attempt to ream down thru it w/a 1 deg motor & DS49 bit on our last run just prior to MWD failure. 00:30 - 02:00 1.50 DRILL P PROD1 Drill ahead f/11,423'-11,481'. ROP 75 fph. TF 60-70L, (TF this section originally drilled at). Confirm we are sidetracked & drilling new hole. 02:00 - 02:30 0.50 DRILL P PROD1 Orient TF to 80-90L 02:30 - 04:15 1.75 DRILL P PROD1 Drill ahead f/11,481'-11,561'. ROP 70 fph. 39K up, 26K dn, 3450 psi freespin @ 2.6 bpm, 250-400 dp on motor. TF 80-90L. 04:15 - 05:15 1.00 DRILL P PROD1 Orient to 80-90L. 05:15 - 06:15 1.00 DRILL P PROD1 Drill ahead to 11,611'. On bottom drilling ROP 100'/hr. 06:15 - 06:30 0.25 DRILL P PROD1 Wiper trip to window. 06:30 - 07:00 0.50 DRILL P PROD1 Drill ahead to 11,648'. 3450 F/S, 350 dp, 2.6 bpm. 07:00 - 08:15 1.25 DRILL N SFAL PROD1 Shock hose on discharge side of mud pump failed, 1 bbl spilled, 10 gallons of which spilled onto the pad. Cleaned up spill & replaced shock hose. 08:15 - 09:15 1.00 DRILL P PROD1 Orient to 80L AOGCC inspector John Crisp granted a (1) day extension on our weekly BOPE test, unless we are OOH before then. 09:15 - 12:00 2.75 DRILL P PROD1 Drill ahead to 11,815', ROP 80-100 fph. 12:00 - 12:30 0.50 DRILL P PROD1 Wiper trip to window. 12:30 - 13:15 0.75 DRILL P PROD1 Drill ahead f/11,815'-11,875'. Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 6 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/10/2001 13:15 - 14:15 1.00 DRILL 3 PROD1 Orient around to 70L. 14:15 - 15:10 0.92 DRILL 3 PROD1 Drill ahead to 11,936'. 15:10 - 15:30 0.33 DRILL ~ PROD1 Flow off survey 15:30 - 15:45 0.25 DRILL P PROD1 Drill on to 11,955' TF 30 L. Hole Iosijng 4-5 bbls/hr throughout the day. 15:45 - 16:15 0.50 DRILL P PROD1 Orient around to 60L. 16:15 - 17:15 1.00 DRILL P PROD1 Drill ahead to 12,000'. ReP 80 -100 fph, 3650 freespin, 350 dp on motor @ 2.6 bpm. 40K up, 25K dn. 17:15 - 18:00 0.75 DRILL P PROD1 Wiper trip to window. 18:00- 18:45 0.75 DRILL P PROD1 Flow off survey. 18:45 - 20:30 1.75 DRILL P PROD1 Orient to 80L, getting 1 out of 3 clicks. 20:30 - 21:30 1.00 DRILL P PROD1 Drill ahead f/12,000-12,085', TF 70-80L. 21:30 - 22:20 0.83~ DRILL N DF^L PROD1 Attempt to drill, appears to be stacking, wiper trip & stack w/no motor work, suspect motor failure. 22:20 - 00:00 1.67 DRILL N DFAL PROD1 POOH to check BHA & perform weekly BOPE test. AOGCC inspector waived witnessing of test. 6/11/2001 00:00 - 02:00 2.00 DRILL N DFAL PROD1 Continue to POOH, monitor well @ 500' 02:00 - 03:25 1.42 DRILL N DFAL PROD1 OOH, L/D BHA. (2) jets on bit plugged w/rubber. Bit will turn by hand, appears to be transmission damage. 03:25 - 09:30 6.08 DRILL P PROD1 Set two way check. Weekly test on BOPE, witnessing of test waived by AOGCC inspector John Crisp. No failures. Pull two way check. 09:30 - 09:45 0.25 DRILL P PROD1 PJSM on cutting coil, emphasis on communication, line of sight by winch operator & hand/body placement. 09:45 - 13:30 3.75 DRILL P PROD1 Cut 100' off coil, weld on new connector, pull & pressure test same. 13:30- 15:00 1.50 DRILL iP PROD1 M/U BHA# 12. 15:00 - 17:30 2.50 DRILL P PROD1 RIH, shallow hole test, OK. Continue in hole, subtract 16' @ EOP flag. 17:30 - 18:15 0.75 DRILL P PROD1 Log gamma tie in, subtract 4' correction. 18:15 - 19:00 0.75 DRILL P PROD1 Continue in hole, tag @ 11,350', drop thru w/pumps off, continue in OK to 12,083' & tag. 19:00 - 19:45 0.75 DRILL P PROD1 Orient to 50L. 19:45 - 20:30 0.75 DRILL P PROD1 Drill ahead f/12,083'-12,090' @ 80-90 fph, see (2) sharp stalls & accompanying losses. 2.5 bpm in @ 3800 psi, 1.85 bpm out...30-40 bph loss rate. Drill on to 12,114'@ 80 fph & see (1) very sharp stall indicative of formation change w/ accompanying loss rate of 120 bph. (1) 10K overpull. 20:30 - 00:00 3.50 DRILL N DPRB PROD1 POOH to pick up nozzle & discuss options w/town. 6/12/2001 00:00 - 00:15 0.25 DRILL N DPRB PROD1 PJSM w/monitoring well @ 500'. Static losses @ 500' @ 5,10 bph. 00:15 - 01:30 1.25 DRILL N DPRB PROD1 OOH, rack back injector & L/D drilling BHA. 01:30 - 02:00 0.50 DRILL N DPRB PROD1 M/U nozzle, stinger & MHA. 02:00 - 05:00 3.00 DRILL N DPRB PROD1 RIH, correction @ EOP flag, -26'. Slight bobble @ 11,350'. Stop @ 12,000'. 240 bbls lost since encountering fault. Pumping @ 12,000'@ .75 bpm, getting .lbpm back. 05:00 - 07:00 2.00 DRILL N DPRB PROD1 Pump 11 bbls 15 ppb liquid casing/OM seal & follow w/33 bbls Form ^ Set pill. W/1 bbl liquid casing/OM seal out @ nozzle, close in annulus & squeeze away 14 bbls. Wellhead climbed to 1600 psi & held, bled pressure & laid in remaining Form ^ Set. W/nozzle @ 10,200', resqueeze formaset, 2-3 bbls away & wellhead climbs to 1600. Hold solid f/5 minutes & bleed. Wash down to 11,175', (below window). Total losses last 10 hours, Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page'7 of 13 Operations Summary Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/12/2001 05:00- 07:00 2.00 DRILL N DPRB PROD1 240 bbls. 07:00 - 09:45 2.75 DRILL N DPRB PROD1 POOH, paint EOP flag @ 10,100'. Monitor @ 500', hole stable, no losses. 09:45 - 11:15 1.50 DRILL N DPRB PROD1 L/D nozzle, P/U BHA #14, omitting resistivity tool this run as expecting to hit major fault @ 12,500'. 11:15 - 13:45 2.50 DRILL P PROD1 RIH, tie into EOP flag, subtract 24'. 13:45 - 14:30 0.75 DRILL P PROD1 Log gama tie in, add 8' correction. 14:30 - 15:15 0.75 DRILL P PROD1 RIH, wash thru Form A Set, smooth thru problem area (~ 11,350'. 15:15 - 15:30 0.25 DRILL P PROD1 Orient TF to 30L. 15:30- 16:45 1.25 DRILL P PROD1 Drill ahead f/12,115'-12,200'. Loss rate resumed as we passed thru 12,090' on way to bottom, 60-90 bph. TF 70L, ROP 80-120 fph, 39K up, 26K dn, 3500 psi freespin @ 2.6 bpm, 250-350 dp on motor. 16:45 - 17:15 0.50 DRILL P PROD1 Orient TF to 80L. Pump 5 bbl LCM pill. 17:15 - 19:15 2.00 DRILL P PROD1 Drill ahead to 12,225', losses ceased after pill out, but also lost MWD signal. Signal cleaned up & losses returned. 60-70 bph loss rate w/drilling. 19:15- 19:30 0.25 DRILL P PROD1 Angle climbing @ 80L TF, orient to 110L. 19:30 - 20:45 1.25 DRILL P PROD1 Drill ahead f/12,225'-12,284'. Drilling became ratty @ 12,255'. ROP down to 30 fph, back up to 60 fph @ 12,270'. Trickling in OM seal/Liquid casing @ I sack every hour, loss rate dropped to 10 bph. 20:45 - 21:20 0.58 DRILL P PROD1 MWD lost sync due to LCM being trickled in, flush w/slug of new mud, OK. 21:20 - 22:15 0.92 DRILL P PROD1 Drill ahead to 12,336', ROP 70-90 fph, loss rate 80 bph. Begin trickling in calcium carbonate LCM. 22:15 - 23:15 1.00 DRILL P PROD1 Wiper trip to window, see motor work @ 11,350' going back in. 23:15 - 00:00 0.75 DRILL P PROD1 Drill ahead f/12,336'-12,385' 70-90 fph. 40-50 bph loss rate w/ trickling in calcium carbonate. 300 bbls lost w/drilling since 15:30. 6/13/2001 00:00 - 01:15 1.25 DRILL P PROD1 Drill ahead f/12,377'-12,450', ROP 70-90 fph. 34000 freespin, 300 dp on motor, 2.6 bpm. 39K up, 36K dn. 70-80L. 35-45 bph loss rate w/drilling this interval. 01:15 - 01:30 0.25 DRILL P PROD1 Orient to 70-80R. 01:30 - 03:00 1.50 DRILL P PROD1 Drill ahead f/12,450'-12,550'. Loss rate increasing to 90 bph @ 12,451', sharp stall @ 12,451' & 12,458'. Stall @ 12,508' & accompanying total losses w/drilling. Stalls @ 12,517' & 12,520'. Drill ahead to 12,540' w/1-2K WOB, 2450 psi ~ 2.18 bpm, ROP 150 fph. ROP decreasing to 25 fph by 12,550', and WOB 2-4K. 03:00 - 04:45 1.75 DRILL N I DPRB PROD1 POOH to above window w/circulating @ lbpm. Call MI for FAS pill & more mud. 04:45 - 05:45 1.00 DRILL N DPRB PROD1 Lay in 20 bbls 20 Ib/bbl OM seal/Liquid casing. No sign of returns. 05:45 - 07:00 1.25 DRILL N I DPRB PROD1 Prepare 2nd OM seal, Liquid Casing pill @ 20 Ibs/bbl & lay in pump same f/11,410', no sign of returns. 07:00 - 08:00 1.00 DRILL N DPRB PROD1 3rd pill, 30 bbls, 20 Ibs/bbl, no sign of returns. Losses since midnite, 350 bbls. 650 total since start of drilling @ 12,114', 15 hrs ago. 08:00 - 10:30 2.50 DRILL N DPRB PROD1 Drop 3/4" ball to open circ sub, ball not on seat after 90 bbls away, (coil volume 57 bbls). Launch 2nd ball, 1st ball on seat immediately, shear circ sub w/2500 psi. Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page8 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/13/2001 10:30 - 10:45 0.25 DRILL N !DPRB PROD1 Pre job on pumping FAS pill. Focus on timing & communication. 10:45 - 12:15 1.50 DRILL N DPRB PROD1 Pump 33 bbls, 30 Ibs/bbl Liquid Casing/OM Seal & chase w/40 bbls Form A Set pill, adding 1/2 sack of Cell-o Flakes to last 20 bbls of FAS pill. w/bit @ 11,330', pump 12 bbls of pill out & close choke, pumping pill away @ 1.6 bpm w/no sign of wellhead increase at all. W/17 bbls of FAS pill out, open choke & POOH laying in remainder of FAS, pumping 30% faster than 1:1. When last of pill clear of bit, slow pump to min rate. 12:15 - 15:15 3.00 DRILL N DPRB PROD1 POOH to 7000' & shut down pump to allow pill to stop reaving when hydrostic finds its equalizing point. 15:15 - 17:30 2.25 DRILL N DPRB PROD1 Continue OOH, pumping 1.2 bpm & getting full returns. 17:30 - 20:30 3.00 DRILL P PROD1 C/O BHA, pick up MWD/USMPR & new battery pack, (80 hour life span & 77 hour memory capacity f/resistivity log.) C/O orienter, bleed sub, motor & MHA, recover (2) 3/4" balls f/circ sub. Surface test orienter. 20:30 - 23:15 2.75 DRILL P PROD1 RIH, shallow hole test, OK, continue in hole. Correction @ EOP flag, subtract 27'. 23:15 - 00:00 0.75 DRILL P PROD1 Tie in w/gamma, add 5' correction. No losses w/RIH. 6/14/2001 00:00 - 00:45 0.75 DRILL P PROD1 Continue to RIH, stacking @ 11,350', finally able to get thru @ 1 bpm w/90L TF. 00:45 - 02:15 1.50 DRILL N DPRB PROD1 Tag again @ 11,408'. Try various techniques, unable to get thru. Opt to POOH f/build section motor & drop off resistivity tool. 02:15 - 06:30 4.25 DRILL N DPRB PROD1 POOH, EOP flag @ 10,100', monitor well @ 500', no losses. 06:30 - 07:15 0.75 DRILL N DPRB i PROD1 L/D BHA #15. 07:15 - 10:00 2.75 DRILL N DPRB I PROD1 Cut 50' off of coil, (flat spot 40' from EOP). Weld on connector, 3ull & PT same. 10:00- 10:30 0.50 DRILL N DPRB PROD1 P/U BH^#16. 10:30 - 13:15 2.75 DRILL N DPRB PROD1 RIH, EOP correction, subtract 25'. 13:15 - 14:00 0.75 DRILL N DPRB PROD1 Log gamma tie in, add 4' correction. 14:00 - 17:00 3.00 DRILL N DPRB PROD1 Tag @ 11,350', orient to 90L, push thru @ lbpm. Tag again @ 11,408', attempt to work through, have to drill through @ 60-70L TF, drill 2' & pop through. Ream & RIH to 11,800, @ 11,575' lost all returns. Continue in hole to 12,550'. Call f/mud & FAS pill. Losing 120-140 bph w/drilling. 17:00 - 17:15 0.25 DRILL P PROD1 !Orient TF to 80-90R, click for click. 17:15 - 18:30 1.25 DRILL P PROD1 Drill ahead @ 30-35 fph, 200-300 dp on motor, 1-3K WOB. TF 80-90R. Drill to 12,575'. 18:30 - 22:30 4.00 DRILL N DPRB PROD1 Pull up hole & work 11,408' area & 11,350'. 11,408' area requiring drilling/reaming thru not just a few times to smooth out. 22:30 - 22:50 0.33 DRILL N DPRB PROD1 RIH to 12,075' & pre job on launching ball. ;22:50 - 23:45 0.92 DRILL N DPRB PROD1 Pump 3/4" ball down & shear @ 2800 psi. 23:45 - 00:00 0.25 DRILL N DPRB PROD1 Pump 30 bbls, 30 Ibs/bbl OM seal Liquid casing. 6/15/2001 00:00 - 01:45 1.75 DRILL N DPRB PROD1 Continue pumping OM seal/Liquid Casing LCM pill, (no F^S).W/bit @ 12,075' & pill @ bit, close in well & bullhead. W/ 10 bbls out, (3-4 bbls into formation), see 3 psi increase in wellhead. Open up to well laying in @ 30% higher pump rate than 1:1. W/3-5 bbls out see full returns. Close in well & squeeze4-5 bbls, wellhead increasing to 700 psi & holding solid w/pump shut down. Bleed pressure off slowly. 01:45 - 04:45 3.00 DRILL N DPRB PROD1 POOH f/drilling assembly w/resistivity tool. No fluid lost to Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 9 of 13 Operations Summary Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/15/2001 01:45 - 04:45 3.00 DRILL N DPRB PROD1 hole w/tripping out. 04:45 - 06:00 1.25 DRILL N DPRB I PROD1 L/D BHA # 16. 06:00 - 10:00 4.00 DRILL N RREP PROD1 Coil showing divets f/gripper blocks 150' from EOP, due to possibly not having reel lined up w/injector properly w/RIH. Cut 160' off of coil, weld on connector, pull & PT same. 10:00 - 12:45 2.75 DRILL P PROD1 M/U BHA #17, surface test orienter, 1st one failed, 2nd one OK. C/O MHA, bleed sub, motor & M/U USMPR. 12:45 - 15:30 2.75 DRILL P PROD1 RIH w/BHA #17, shallow hole test, OK. Full returns until 6500', then all returns ceased. Correct @ EOP flag, subtract 22'. 15:30 - 16:15 0.75 DRILL P PROD1 Log gamma tie in, subtract 1' correction. 16:15 - 17:15 1.00 DRILL P PROD1 Continue in hole. 17:15 - 18:00 0.75 DRILL P PROD1 Orient & ream to bottom, ream/drill bridge @ 12,508'. Losing 120-140 bph. 18:00 - 18:20 0.33 DRILL P PROD1 100 wpertrp. 18:20 - 19:20 1.00 DRILL P PROD1 Drill ahead, 12,575'-12,624'. Drilling w/no returns. 41K up, 29K down. 2800 freespin @ 2.6 bpm, 100 -200 dp on motor. TF 70R, 1-2K WeB. Losing 140 bph w/drilling. 19:20 - 19:45 0.42 DRILL P PROD1 Orient around to 80R. Start pumping KCL. 19:45 - 21:00 1.25 DRILL P PROD1 Drill ahead f/12,624'-12,693'. ReP 33-70 fph. Pump 15 bbl biozan sweep. '21:00 - 22:45 1.75 DRILL P PROD1 Wiper trip to 11,500', clean suction screen. RBIH, hole smooth. 22:45 - 23:10 0.42 DRILL P PROD1 Orient to 70L. 23:10 - 00:00 0.83 DRILL P PROD1 Drill ahead f/12,693'-12,728', TF 70-80L. ReP 70-80 fph. Over pulling to 48K, 7-8K over. (1) OP @ 12,722' to 55K, pull free, OK. 6/16/2001 00:00 - 00:15 0.25 DRILL P PROD1 Wiper trip to 12,450, pump 10 bbls 25 ppb LCM & follow w/Fie Pro. 00:15 - 01:45 1.50 DRILL N DPRB PROD1 Drill ahead to 12,733', heavy overpull to 59K. P/U & back down, instant overpull. Lost signal to MWD due to LCM, pump KCL to flush, no good. May be exposed to 2nd fault, as well appears to be drinking even more, and BHA is sticking at the first sign of weight not transferring to bit. Opt to pump another Form ^ Set & POOH. 01:45 - 03:00 1.25 DRILL N DPRB PROD1 Pump 30 bbls, 301bs/bbl OM seal/Liquid casing LCM pill. W/bit @ 12,725, & pill coming out, POOH @ 45 fpm pumping 1.3 bpm. W/20 bbls out stop pulling, shut in & attempt to squeeze. No wellhead pressure. Open up & pump rest of pill clear w/ POOH. Stop @ 11,450' & pump to see returns, nary a drop. Losing 140-160 bph. Back on KCL. 03:00 - 08:00 5.00 DRILL N DPRB PROD1 Mixing FAS @ mud plant, mixing 45 bbls 35 ppb LCM pill on rig. 08:00 - 09:00 1.00 DRILL N DPRB PROD1 Drop 3/4" ball to open circ sub. Shear @ 2500 psi. 09:00 - 10:30 1.50 DRILL N DPRB PROD1 Pump 42 bbls 30 ppb LCM & chase w/35 bbls Form ^ set. W/ bit 612,080' & pill starting out, close in well & pump 17 bbls, no wellhead building. Open well & POOH @ 45 fpm pumping @ 1.3 bpm. No returns seen, lay in Form ^ Set & pull to window, Close in & squeeze 5 bbls, no increase in wellhead pressure. 10:30 - 13:00 2.50 DRILL N DPRB PROD1 Open well & clear bit of pill & POOH to 5000', shut down pump & shut in well to allow wellbore fluid to find its point of equalibrium & allow FAS to set up. Monitor well. 13:00 - 15:00 2.00 DRILL N DPRB PROD1 Break circulation, pump 35 bbls to get returns. Full returns. 15:00 - 16:30 1.50 DRILL N DPRB PROD1 L/D BHA # 17 & M/U nozzle/stinger BH^. Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 10 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/16/2001 16:30 - 18:30 2.00 DRILL P PROD1 RIH to 2500' & service injector. 18:30 - 21:15 2.75 DRILL N DPRB PROD1 RIH pumping min rate getting full returns to 9500'. Start to see diminishing returns. 21:15 - 22:00 0.75 DRILL N DPRB PROD1 Stop @ 9500' & circulate KCL, gradually increadsing rate to 2.5 bpm, getting 90% returns. Displace FIo Pro out, recover 150 bbls. 22:00 - 22:45 0.75 DRILL N DPRB PROD1 RIH, correct @ EOP flag, subtract 14'. Continue in, slight bobblle @ 12,420', stop @ 12,850'. 22:45 - 00:00 1.25 DRILL N DPRB PROD1 Circulate @ 2.5 bpm w/POOH, flag pipe @ 10,200' 6/17/2001 00:00- 02:00 2.00 DRILL N DPRB PROD1 Continue POH. EOP @ 10200'. 02:00 - 03:00 1.00 DRILL N DPRB PROD1 Monitor well at 500'. Rack back injector. L/D nozzle/ P/U packer. 03:00 - 06:00 3.00 DRILL N DPRB PROD1 RIH w/Baker inflatable bridge plug, subtract 1' correction @ EOP flag. Run in to 11,850', full returns. 06:00 - 07:30 1.50 DRILL N DPRB PROD1 Pump ball. P/U & RIH to 11,815'. Ball on seat W/49 bbls away. Pressure up to 400 psi & hold f/10 min. Pressure up to 1000 psi & hold/10 min. 1500 psi/10 min. Shear @ 2100 psi, P/U & set down 2-3K to verify BP Set. 07:30- 10:00 2.50 DRILL N DPRB PROD1 POH. Flag EOP at 10200'. POH to 500'. Observe well. OK. 10:00 - 11:00 1.00 DRILL N DPRB PROD1 L/D running tool. M/U nozzle and stinger. 11:00 - 13:30 2.50 DRILL N DPRB PROD1 RIH to EOP. No correction. Tag top of pkr 611,805'. 13:30- 14:30 1.00 DRILL N DPRB PROD1 RU cementers. PJSM. Batch up. 14:30 - 17:30 3.00 DRILL N DPRB PROD1 PT to 4000 psi, pump 5 bbls water, 22 bbls 15.8 ppg neat cement, 5 bbls water & switch to rig pumps. Continue displacing w/20 bbls KCL & 38 bbls biozan. W/12 bbls biozan out, (1-2 bbls cmt out nozzle), @ 11,805', POOH laying in pumping 10-20% faster than 1:1. Slight wt bobble @ 11,350. Pull up to 10,800' & wait 20 min to allow cement to settle out. RIH contaminating w/bio to 11,175' & chase cement out of hole. Cement in place @ 15:30, est TOC 11,180'. RBIH to 11,175' & pump, leaving clean bio f/11,175 up to 11,100'. Flag @ 10,200'. 1:1 returns throughout job. 17:30 - 20:30 3.00 DRILL N DPRB PROD1 POOH to 500'. Observe well. OK. Test choke manifold w/ POOH. 20:30- 21:00 0.50 DRILL N DPRB PROD1 Rack back injector. L/D nozzle. PJSM. 21:00 - 23:00 2.00 DRILL N DPRB PROD1 Set Two way check valve. Flush stack. 23:00 - 00:00 1.00 DRILL P PROD1 Conduct weekly BOPE test, AOGCC state inspector John Spalding waived witnessing of test. 6/18/2001 00:00 - 02:00 2.00 DRILL P PROD1 Continue BOPE test. No failures. 02:00 - 03:00 1.00 DRILL P PROD1 Pull two way check. 03:00- 04:30 1.50 STKOH P PROD1 P/U building assembly. 04:30 - 07:15 2.75 STKOH P PROD1 RIH w/drilling assembly, shallow hole test, OK. EOP flag correction, subtract 5'. 07:15 - 08:15 1.00 STKOH P PROD1 Log tie in w/gamma, subtract 9' correction. 08:15-08:30 0.25 STKOH P PROD1 RIH, tag@ 11,165'. 08:30 - 09:30 1.00 STKOH P PROD1 Orient ........... MWD pulses weak .... 5 psi. Not getting clicks in open hole, P/U into casing to orient. 09:30-10:00 0.50 STKOH P PROD1 RIH & drill/wash to11,185' & see 200 dp on motor @11,185. Cement not real hard. 10:00-12:15 2.25 STKOH P PROD1 Troughingf/11,150-11,185',TF90R. 12:15 - 13:15 1.00 STKOH P PROD1 Pull into casing & orient to 130L. 13:15 - 14:00 0.75 STKOH P PROD1 Trough down f/11,160'-11,188'. 14:00 - 14:45 0.75 STKOH P PROD1 Control drill @ 10'/hr to 11,195'. see motor work & wt loss to Printed: 6/26/2001 3:13::)3 PM ,ir.¸ BP EXPLORATION Page 11 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/18/2001 14:00 - 14:45 0.75 STKOH P PROD1 194.5, sudden drop off, probably jumped the ledge. 14:45 - 15:15 0.50 STKOH P PROD1 Go back to troughing, TF 130L, f/11,160-11,195. 15:15 - 19:30 4.25 STKOH P PROD1 Work through TFwalks 611180' to 100L 19:30 - 20:30 1.00 STKOH P PROD1 Start time drilling 1/10 per 6 min. 20:30 - 22:00 1.50 STKOH P PROD1 Time drill 6 1/10' per 2 min. 22:00 - 23:00 1.00 STKOH P PROD1 Time drill 1/10' per 2 min. 2.6/2700/115L 23:00 - 23:15 0.25 STKOH P PROD1 Reactive to 160R. Orienting. 23:15 - 00:00 0.75 STKOH P PROD1 Time drill 61/10'. per 1 min. 2.6/2700/120L. ,6/19/2001 00:00 - 00:45 0.75 STKOH P PROD1 Continue time drilling. 2.6/2700/120L. 38 K up. 28k dh. 00:45 - 01:45 1.00 STKOH P PROD1 Orient to 30L. Drilling. Lost returns 01:45 - 03:30 1.75 DRILL N DPRB PROD1 Drilling no returns pump 10 bbls of LCM. 15 ppg. LCMN out of the bit. Still no returns. 03:30 - 04:15 0.75 DRILL N DPRB PROD1 Pump 10 bbls of 15 ppg pill...no rtns. 04:15 - 05:15 1.00 DRILL N DPRB PROD1 Pump 10 more.same results. 05:15 - 09:00 3.75 DRILL N DPRB PROD1 Pull up into 7" & mix 50 bbls/40 ppb LCM pill 09:00 - 09:30 0.50 DRILL N DPRB PROD1 Drop 3/4" ball to open circ sub, shear circ sub 6 2300 psi. 09:30 - 11:15 1.75 DRILL N DPRB PROD1 Pump 45 bbls/40 ppb OM seal/liquid casing pill & chase w/30 bbls FIo Pro .Disp w/KCL. W/bit 6 11,190', & pill coming out, close in well & squeeze 20 bbls 6 1 bpm ..... no wellhead increase at all. Open well & circulate 6 2bpm f/10 bbls w/ POOH 6 45 fpm, no returns, Close in & squeeze 5 bbls, then open back up & lay in remaining pill & FIo Pro. 11:15 - 14:00 2.75, DRILL N DPRB PROD1 POOH f/nozzle assembly. 14:00 - 15:30 1.50 DRILL N DPRB IPROD1 L/D driling asssembly. P/U nozzle. 15:30 - 17:50 2.33 DRILL N DPRB PROD1 RIH w/nozzle. Found bridge 611245'. Unable to go deeper. 17:50 - 19:00 1.17 DRILL N DPRB PROD1 Call cementers. Cement truck on location. Call to town to review forward plan. Decide to drill ahead. 19:00 - 21:00 2.00 DRILL N DPRB ;PROD1 Mixing LCM pill. Pump LCM and chase w/KCI. 21:00 - 23:00 2.00 DRILL N DPRB I PROD1 RIH to 11245'. Lay in 27 bbls/40 ppb OM seal/liquid casing pill 1:1. Pump 0.6 BPM 6400 psi. No returns. POH. Circulate 6 2bpm no returns. POH while pumping at minimum rate. 23:00 - 00:00 1.00 DRILL N DPRB ~ PROD1 POH to p/u drilling assembly. 6/20/2001 00:00 - 01:30 1.50 DRILL N DPRB :PROD1 Continue POH. 01:30 - 03:45 2.25 DRILL N DPRB ~PROD1 OOH. L/D nozzle. MU drilling assembly w/2.1 deg motor. Remove LCM material from suction screens. Test orienter. OK. 03:45 - 04:30 0.75 DRILL N DFAL PROD1 RIH w/2.1 deg motor. Higher pressure than expected. Sudden drop in pressure. POH to check BHA. 04:30 - 05:30 1.00 DRILL N DF^L PROD1 Check out BHA. No problem everything looks right. Change pulser anyway. 05:30 - 09:45 4.25 DRILL P PROD1 RIH. well on vaccum. 09:45 - 10:35 0.83 DRILL P PROD1 Tie w/gamma. -2' correction. Continue RIH. pass through 11245' w/o problems. 10:35 - 11:00 0.42 DRILL P PROD1 Drill ahead. 2.7/3000/30L. 11:00- 11:15 0.25 DRILL P PROD1 Shorttrip. 11:15 - 12:00 0.75 DRILL P PROD1 Drill ahead. 2.7/3000/45L. Drill to 11385'. 12:00 - 12:30 0.50 DRILL P PROD1 Short trip. Pump Biozan sweep. 12:30 - 15:45 3.25 DRILL P PROD1 Finish build section. POH to change BH^. 15:45 - 16:00 0.25 DRILL P PROD1 Watch well 6500'. OK. 16:00 - 18:30 2.50 DRILL P PROD1 OOH. L/D build assembly. P/U lateral assembly 18:30 - 23:30 5.00 DRILL N SFAL PROD1 MWD no communicating on surface.. L/D MWD and trouble shoot tool. Change D^S in MWD. Test tool no communication. Tool work at catwalk but once is pick up Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 12 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/20/2001 18:30 - 23:30 5.00 DRILL N SFAL PROD1 communication is lost. Need to take off resistivity tool from BHA. 23:30 - 00:00 0.50 DRILL P PROD1 RIH to 500'. Shallow hole test. OK. Continue rih. 6/21/2001 00:00 - 01:50 1.83 DRILL P PROD1 Continue RIH. -14 ft correction @EOP 01:50 - 04:00 2.17 DRILL N DFAL PROD1 Out ofsinc. Not having pulses. Check transducer for blockage. No blockage. Change pumps. Got good pulses but not able to sinc. Continue working on. Sinc up MWD. 04:00 - 04:30 0.50 DRILL P PROD1 Tie in w/gamma +1' correction. 04:30 - 05:20 0.83 DRILL P PROD1 RIH. Pass through 11245' w/o problems. Tag bottom @ 11380'. 05:20 - 06:00 0.67 DRILL P PROD1 Orienting to 90L. 06:00 - 07:00 1.00 DRILL P PROD1 Drill ahead. 2.6/2500/90L. Drill to 11435'. 07:00 - 07:15 0.25 DRILL P PROD1 Short trip to the window. 07:15 - 08:00 0.75 DRILL P PROD1 Work tight spot @11370' - 11390'. 08:00 - 08:20 0.33 DRILL P PROD1 Drill to 11465'. 2.6/2500/35L. 08:20 - 08:45 0.42 DRILL P PROD1 Wiper trip to the window. 08:45 - 09:10 0.42 DRILL P PROD1 Drill to 11495'. 2.6/2500/35L. 45k#s up. 26k#s dn. 09:10 - 09:30 0.33 DRILL P PROD1 Wiper trip to the window. 09:30 - 10:55 1.42 DRILL P PROD1 Drill to 11502. Orient ing to 110L. 2.6/2800/110L. Drill to 11560 10:55 - 11:20 0.42 DRILL P PROD1 Short trip to the window, 11:20 - 12:00 0.67 DRILL P PROD1 Drill ahead. 2.6/2700/70L 12:00-13:15 1.25 DRILL P PROD1 Wiper trip to the window. Check for flow. OK. 13:15 - 13:45 0.50 DRILL P PROD1 Drill at 2.6/2300/90L. Not getting DLS. Drill to 11658'. POH 13:45 - 14:30 0.75 DRILL P PROD1 Pump biozan sweep. 14:30 - 16:45 2.25 DRILL P PROD1 Continue POH. Had some returns. Observer well at 10575'. No flow. 16:45 - 19:30 2.75 DRILL P PROD1 Continue POH. 19:30 - 20:00 0.50 DRILL P PROD1 OOH. L/D BHA. P/U BHA # 25. Change out bit. 20:00 - 21:30 1.50 DRILL N SFAL PROD1 Lost rig power. Call mechanics. Found generator starter fried. Install new starter. 21:30 - 21:45 0.25 DRILL P PROD1 MU BHA. 21:45-22:15 0.50 DRILL P PROD1 RIHw/BH^#25. Shallow hole test. OK. 22:15 - 00:00 1.75 DRILL P PROD1 RIH. -23' correction @EOP. RIH to 10320' for gamma ray correlation 6/22/2001 00:00 - 02:05 2.08 DRILL P PROD1 Tie in w.gamma. +4' correction. 02:05 - 02:30 0.42 DRILL P PROD1 Tag bottom at 11663'. 02:30- 02:50 0.33 DRILL P PROD1 Drill ahead. 2.5/2450/HS. 02:50 - 03:40 0.83 DRILL P PROD1 Orienting to 70-80L 03:40 - 04:30 0.83 DRILL P PROD1 Drill to 11725'. 2.5/2350/80L 04:30 - 05:00 0.50 DRILL P PROD1 Wiper trip to the window. 05:00 - 05:45 0.75 DRILL P PROD1 Drill ahead 2.5/2350/70L. TD well @11781'. 05:45 - 06:30 0.75 DRILL P PROD1 Wiper trip to the window. Hard pull @11372' . Pull 50 K. 06:30 - 08:00 1.50 DRILL P PROD1 Pump biozan, ream f/11370' to/11390'. 08:00 - 11:00 3.00 DRILL P PROD1 POH. 11:00- 12:00 1.00 DRILL P PROD1 OOH. L/D BHA. 12:00- 12:45 0.75 DRILL P PROD1 P/U resistivity tool. 12:45 - 13:15 0.50 DRILL P PROD1 Surface test and MU injector, 13:15 - 15:30 2.25 EVAL P PROD1 RIH w/resistivity. 15:30 - 16:00 0.50 EVAL P PROD1 Tie w/gamma. +9' correction. 16:00 - 17:00 1.00 EVAL P PROD1 RIH to tag bottom. TD @11781'. 17:00 - 21:00 4.00 EVAL P PROD1 Logging up hole. 21:00 - 22:20 1,33 EVAL P PROD1 Motor plugged, can not pump the rate needed to get real time. Printed: 6/26/2001 3:13:23 PM BP EXPLORATION Page 13 of 13 Operations Summa Report Legal Well Name: Y-23 Common Well Name: Y-23a Spud Date: 6/1/1986 Event Name: REENTER+COMPLETE Start: 6/1/2001 End: 6/12/2001 Contractor Name: NABORS TRANSOCEAN Rig Release: 6/24/2001 Rig Name: CDR-1 Rig Number: 1 Date From - To Hours Activity Code NPT Phase Description of Operations 6/22/2001 21:00 - 22:20 1.33 EVAL P PROD1 Logging out with memory. 22:20 - 00:00 1.67 EVAL P PROD1 Finished logging. POH. Pumping down backside. 6/23/2001 00:00 - 01:45 1.75 EVAL P PROD1 Continue POH. 01:45 - 03:00 1.25 EVAL P PROD1 OOH. Lay down BHA. Download data. 03:00 - 09:00 6.00 CASE P COMP Hold PJSM. P/U 2 7~8" slotted/solid & 3 3/16" liner. 09:00 - 09:30 0.50 CASE P COMP RU to run 1 1/4" CSH inner string. 09:30 - 12:00 2.50 CASE P COMP PU polished stinger and 54 jts 1 1/4" CSH. Space out & sting in to pack-off bushing. MU liner deployment tools. 12:00 - 15:00 3.00 CASE P COMP RIH with liner on CT. Correct to flag at 11141' (-50' corr'n). 15:00 - 15:30 0.50 CASE P COMP Run liner in to open hole. Took wt at shale @ 11370' but went on thru OK. Cont RIH and tag bottom at 11781'. 15:30 - 16:15 0.75 CASE P COMP Load and launch 5/8" ball. Circ ball down on seat at 48.5 bbls away. Pressure up and shear out ball seat at 3300 psi to release off liner. PU and confirm released from liner. 16:15 - 16:30 0.25 CASE P COMP Circ clean KCL thru bottom of liner. 16:30 - 19:30 3.00 CASE P COMP POH with workstring laying in clean KCl in liner. 19:30-21:30 2.00 CASE P COMP OOH. Rackback 1 I/4"CSH. 21:30 - 23:30 2.00 CASE P COMP P/U nozzle. RIH to 2000' for FP. 23:30 - 00:00 0.50 CASE P COMP L/D 1 1/4" CSH and liner equipment. 6/24/2001 00:00 - 01:00 1.00 CASE P COMP Waiting on DSM. Cleaning up pits. '01:00 - 01:30 0.50 CASE P COMP Set BPV in tubing hanger. 01:30 - 06:00 4.50 CASE P COMP Blow down mud lines suctions and stack. Nipple down. Continue cleaning pits. Rig released @ 06:00. Tear down rig components for move to Y-15A. Wells group still working on well prep. Printed: 6/26/2001 3:13:23 PM Page 1 of 1 Well Events for SurfaceWell Y-23 from 05/26/2001 to 8/10/2001 Well Date Description of Work Y-23A 07/21/2001 CTD-POST WORK: INSTALL GLV REDESIGN (POST CTD) Y-23A 07/20/2001 CTD-POST WORK: SET GLV'S (POST CTD GL REDESIGN) Y-23A 07/01/2001 CTD-POST WORK: STATIC SURVEY/GLV C/O (POST CTD) Y-23A 06/30/2001 CTD-POST WORK: STATIC, SET GENERICS (POST CTD) Source AWGRS PBU AW.G.RS...PBU. AWGRS.PB.U AWGRS PBU Y-23A 06/26/2001 CTD-POST WORK: BLEED OA AND LOAD WITH DEAD CRUDE. AWGRS PBU http://apps-a~aska.bpweb.bp.c~m/sst-dri~~ing-we~~s/we~~-events-query/we~~events.asp.../200 8/10/2001 ObP BP Amoco Baker Hughes INTEQ Survey Report Cmpany: BP Amoco Site: PB Y Pad Well: Y-23 Wellpu~: Y-23A Date: 8/10/2001 Time: 14:31:54 Page: 1 Coordinate(NE) Reference: Well: Y-23, True North Verfl~l (TVD) Reference: 33: 23 6/111986 00:00 88.8 Section (VS) Reference: Well (0.00N,0.00E,260.00Azi) Slrvey Cuk:lbltion Merited: Minimum Curvature Db: Oracle Field: Prudhoe Bay North Slope UNITED STATES Map System:US State Plane Coordinate System 1927 Gee Datum: NAD27 (Clarke 1866) Sys Datum: Mean Sea Level Map Zone: Alaska, Zone 4 Coordinate System: Well Centre Geomagnetic Model: BGGM2001 Site: PB Y Pad TR-11-13 UNITED STATES: North Slope Site Position: Northing: From: Map Easting: Position Uncertainty: 0.00 ft Ground Level: 0.00 ft 5948541.48 ft Latitude: 70 16 0.041 N 647748.73 ff Lougitode: 148 48 18.991 W North Reference: True Grid Convergence: 1.12 deg Well: Y-23 Slot Name: 23 Y-23 Well Position: +N/-S 399.85 ft Northing: 5948883.32 ff Latitude: 70 16 3.968 N +E/-W-2950.60 ft Easting: 644791.07 ft Longitude: 148 49 44.876 W Position Uncertainty: 0.00 ft Wellpath: Y-23A Drilled From: Y-23APB1 500292159001 Tie-on Depth: 11186.00 ft Current Datum: 33: 23 6/1/1986 00:00 Height 88.81 ff Above System Datum: Mean Sea Level Magnetic Data: 5/30/2001 Declination: 26.57 deg' Field Strength: 57471 nT Mag Dip Angle: 80.75 deg Vertical Section: Depth From (TVD) +N/-S +E/-W Direction ff ff ff deg 0.00 0.00 0.00 260.00 Survey: MWD Start Date: 6/22/2001 Company: Baker Hughes INTEQ Engineer: Tool: MWD,MWD - Standard Tied-to: From: Definitive Path Annotation i1186.00 8896.51 KOP 11781.00 8964.66 TD Survey : MD,:,:: "Incl" ,= It',':': ,,~,' ,'ft:, : ',";'ft,:" ,, :'ft',::: , deg/100ff' ft' ,,~, 11186.00 54.90 334.90 8896.51 8807.70 4377.36 -4238.12 5953178.02 640469.86 0.00 3413.62 11219.00 53.50 330.00 8915.83 8827.02 4401.08 -4250.49 5953201.50 640457.04 12.77 3421.67 11258.00 61.80 328.60 8936.68 8647.87 4429.37 -4267.31 5953229.46 640439.68 21.50 3433.33 11313.00 72.30 320.80 8958.12 8869.31 4470.53 -4296.62 5953270.04 640409.59 23.11 3455.04 11343.00 78.60 319.10 8965.65 8876.64 4492.74 -4315.29 5953291.89 640390.49 21.70 3469.58 11374.00 64.80 318.00 8970.13 8881.32 4515.72 -4335.59 5953314.47 640369.76 20.31 3485.58 11412.00 64.70 314.10 8973.61 8884.80 4542.96 -4361.85 5953341.20 640342.98 10.22 3506.71 11459.00 86.10 307.10 8977.38 8888.57 4573.42 -4397.40 5953370.97 640306.86 15.14 3536.43 11526.00 90.30 303.20 8979.48 8890.67 4611.96 -4452.13 5953408.45 640251.40 8.55 3583.64 11573.00 88.50 302.90 8979.98 8891.17 4637.59 -4491.52 5953433.31 640211.52 3.88 3617.98 11619.00 88.50 299.70 8981.18 8892.37 4661.48 -4530.81 5953456.44 640171.79 6.95 3652.52 11657.00 88.40 297.30 8982.21 8893.40 4679.60 -4564.19 5953473.91 640138.07 6.32 3682.25 11697.00 88.60 291.60 8983.26 8894.45 4696.14 -4600.58 5953489.75 640101.37 14.25 3715.21 11741.00 89.20 284.30 8984.10 8895.29 4709.69 -4642.40 5953502.49 640059.30 16.64 3754.04 11781.00 89.20 264.30 8984.66 8895.85 4719.57 -4681.16 5953511.62 640020.36 0.00 3790.49 Ved~calEfVD) Reference System ~,~ean Sea Leve~ Sec00n (VSI Reference S~ot 23 0 O0N 0 00E~ Measured De~{h Reference 33 236,q!19860000 8881 Calculation MelhOd M~n~mum Curvature 7800 79oo 800o 8100 ~0300 ~¢400 ~ST00 8800' 6800 6/00 66O0 6500-640O 6300 6200 B1O0 8000 ,5900.5800.5700 5680 5500-5400-5300 52OO 5100 50O0 4900 =$880-4Z00 460O ~500 ~400 M300 4200 West(-)/East(+) [100ft/in] 2800 290( 3000 3100 3200 3300 3400 350( 3600 3Z00 3800 ~900 4000 4100 4200 4300 4400 4500 4800 4700 4800 4900 bOO(} 5100 5200 5300 5'~00 5500 b600 5700 580( 5900 6000 6100 ~200 6300 640(] 6508 660{ Vert~ca~ Section at 280o00° [lOOft/~n] 8/I0/2001 2:35 PM ObP i BP Amoco Baker Hughes INTEQ Survey Report C. ompany: BP Amoco ~q~d: Prudh~ ~ Site: PB Y Pad Well: Y-23 Wellpath: Y-23APB2 Bate: 8/10/2001 Time: 14:33:31 Page: 1 Co-o~iaate(NE) Reference: Well: Y-23, True North Vertical (TV1)) Refereuce: 33: 23 6/111986 00:00 88.8 ~m (VS) l{Jefereace: Well (0.00N,0.00E,308.86Azt) $lrvey Caicllitloa Metkod: Minimum Curvature Db: OracJe Field: Prudhoe Bay North Slope UNITED STATES Map System:US State Plane Coordinate System 1927 Geo Datum: NAD27 (Clarke 1866) Sys Datum: Mean Sea Level Map Zone: Alaska, Zone 4 Coordinate System: Well Centre Geomagnetic Model: BGGM2001 Site: PB Y Pad TR-11-13 UNITED STATES: North Slope Site Position: Northing: From: Map Easting: Position Uncertainty: 0.00 ft Ground Level: 0.00 ft 5948541.48 ft Latitude: 70 16 0.041 N 647748.73 ff Longitude: 148 48 18.991 W North Reference: True Grid Convergence: 1.12 deg Well: Y-23 Slot Name: 23 Y-23 Well Position: +N/-S 399.85 ff Northing: 5948883.32 ff Latitude: 70 16 3.968 N +FJ-W-2950.60 ft Easting: 644791.07 ft Longitude: 148 49 44.876 W Position Uncertainty: 0.00 ft Wellpath: Y-23APB2 Drilled From: Y-23APB1 500292159071 Tie-on Depth: 11409.00 ft Currout Datum: 33: 23 6/1/1986 00:00 Height 88.81 ff Above System Datum: Mean Sea Level Magnetic Data: 6/10/2001 Declination: 26.52 deg Field Strength: 57487 uT Mag Dip Augle: 80.76 deg Vertical Section: Depth From (TVD) +N/-S +E/-W Direction ff ff ff deg 0.00 0.00 0.00 308.86 Survey: MWD Start Date: 6/16/2001 Company: Baker Hughes INTEQ Engineer: Tool: MWD,MWD - Standard Tied-to: From: Definitive Path Annotation ' ,':MD'i ':" "::TVD ,': ,i!, ' i14°9.o'o '6972.59 KoP J 12733.00 9006.00 TD Survey : * :::::/ inq:::' :': Azlm:: ::' TVD ~:' ,,sSTVD: ::: N/S,: :, ,'EZw:,;i: :',,', ::'MapN:,~ :::';' :,,,:::::,: Di,S,:~ ,:, .... :: ¥S ,' ::::ft:i:i' 'i,':deg :', :~:deg:~,: ,:, ::, :ft,:::' ' ", :'::ft:':: ": ft:' '::'i:', ;::,ft, :,'~,, 11409.00 83.00 305.70 8972.59 8883.78 4532.18 -4371.79 5953330.23 640333.25 0.00 6247.82 11469.00 64.10 299.40 8979.34 8890.53 4564.24 -4422.02 5953361.31 640282.42 10.59 6307.05 11517.00 84.30 299.00 8964.19 8895.38 4587.53 -4463.71 5953383.80 640240.29 0.93 6354.13 11 549.00 85.40 296.00 8987.06 8898.25 4602.25 -4491.97 5953397.97 640211.75 9.95 6385.37 11589.00 64.80 296.20 8990.48 8901.67 4619.78 -4527.76 5953414.81 640175.63 1.58 6424.24 11625.00 64.60 293.10 8993.81 8905.00 4634.73 -4560.34 5953429.13 640142.78 8.59 6458.98 11691.00 82.10 287.10 9001.46 8912.65 4657.25 -4621.86 5953450.46 640080.84 9.79 6521.02 11766.00 80.80 281.80 9012.61 8923.80 4675.76 -4693.65 5953467.58 640008.71 7.20 6588.54 11884.00 88.20 274.80 9023.93 8935.12 4692.65 -4809.73 5953482.23 639892.34 8.61 6689.52 11930.00 89.30 273.40 9024.93 8936.12 4695.94 -4855.60 5953484.64 639646.42 3.87 6727.30 12044.00 91.60 266.30 9024.04 8935.23 4695.64 -4969.52 5953482.15 639732.54 6.55 6815.82 12066.00 91.00 267.70 9023.54 8934.73 4694.49 -4991.48 5953480.58 639710.60 6.92 6832.20 12108.00 92.00 268.50 9022.44 8933.63 4693.10 -5033.44 5953478.38 639668.68 3.05 6864.00 12140.00 93.60 265.60 9020.87 8932.06 4691.45 -5065.36 5953476.12 639636.80 10.34 6887.82 12183.00 96.90 261.80 9016.94 8928.13 4686.76 -5107.91 5953470.61 639594.35 11.68 6918.00 12229.00 94.80 259.30 9012.25 8923.44 4679.24 -5153.04 5953462.23 639549.38 7.08 6948.43 12261.00 90.60 256.50 9010.74 8921.93 4672.54 -5164.28 5953454.93 639518.27 15.77 6968.56 12296.00 89.10 253.30 9010.83 8922.02 4663.43 -5218.07 5953445.17 639484.67 10.10 6989.14 BP Amoco Baker Hughes INTEQ Survey Report INTEQ Coml~By: BP Amoco Dnte: 8/10/2001 Time: 14:33:31 l'age: 2 l~id: Pmdhoe Bay C4~rdI~Bte(NE) ltefere,,ce: Well: Y-23, True Norlh Site: PB Y Pad Vertical (TVD) EefemBee: 33: 23 6/111986 00:00 88.8 Well: Y-23 Sectioa 0/S) Reference: Well (0.00N,0.00E,308.86Azi) Wdll~tk: Y-23APB2 Sar~ CalealatloB Met~ed: Minimum Curvature Db: Oracle Survey MD I~.1 .~m TVD SSTVD N/S E/W MapN MapE DLS VS ff (leg deg ff ff It ff tt ff deg~lOC)it ff 12341.00 89.50 249.80 9Ol 1.38 8922.57 4649.19 -5260.75 5953430.11 639442.28 7.83 7013.44 12380.00 88.90 247.00 9011.93 8923.12 4634.84 -5297.00 5953415.07 639406.31 7.34 7032.67 12426.00 88.40 241.00 9013.01 8924.20 4614.69 -5338.31 5953394.13 639365.39 13.09 7052.19 12483.00 90.30 244.90 9013.66 8924.85 4588.77 -5389.06 5953367.24 639315.15 7.61 7075.45 12523.00 90.50 247.40 9013.38 8924.57 4572.60 -5425.64 5953350.37 639278.89 6.27 7093.79 12590.00 92.50 255.40 9011.62 8922.81 4551.25 -5489.07 5953327.81 639215.90 12.30 7129.78 12622.00 94.70 262.50 9009.61 8920.80 4545.13 -5520.39 5953321.09 639184.70 23.19 7150.33 12674.00 91.00 267.00 9007.03 8918.22 4540.39 -5572.09 5953315.35 639133.11 11.19 7187.61 12733.00 91.00 267.00 9006.00 8917.19 4537.30 -5631.00 5953311.13 639074.28 0.00 7231.54 ObP o¢-oaT BP Amoco Baker Hughes INTEQ Survey Report INTEQ Company: BP Amoco Site: PB Y Pad Well: Y-23 Wdlpatk: Y-23APB1 Date: 8/10/2001 Time: 14:32:51 Page: 1 Ce-e~llaate(Ng) Reference: Well: Y-23, True Norlh Vertical (TVD) Reference: 33: 23 6/111986 00:00 88.8 Section (VS) Reference: Well (0.00N,0.00E,314.62Azi) Su~ey Caleulattoa Method: Minimum Curvature Db: Oracle Field: Prudhoe Bay North Slope UNITED STATES Map System:US State Plane Coordinate System 1927 Geo Datum: NAD27 (Clarke 1866) Sys Datum: Mean Sea Level Map Zone: Alaska, Zone 4 Coordinate System: Well Centre Geomagnetic Model: BGGM2001 Site: PB Y Pad TR-11-13 UNITED STATES: North Slope Site Position: Northlng: From: Map Eastlng: Position Uncertainty: 0.00 ft Ground Level: 0.00 ft 5948541.48 ft 647748.73 ft Latitude: 70 16 0.041 N Longitude: 148 48 18.991 W North Reference: True Grid Convergence: 1.12 deg Well: Y-23 Y-23 WeH Position: +N/-S 399.85 ft Northing: 5948883.32 ft +E/-W-2950.60 ff Easting: 644791.07 ff Position Uncertainty: 0.00 ft Slot Name: 23 Latitude: 70 16 3.968 N Longitude: 148 49 44.876 W Wellpath: Y-23APB1 Drilled From: Y-23 500292159070 Tie-on Dep~: 11120.00 ft Current Datum: 33: 23 6/1/1986 00:00 Height 88.81 ff Above System Datum: Mean Sea Level Magnetic Data: 8/10/2001 Declination: 26.52 deg Field Strength: 57487 nT Mag Dip Angle: 80.76 deg Vertical Section: Depth From (TVD) +N/-S +E/-W Direction ff ff ff deg 0.00 0.00 0.00 314.62 Survey: MWD Start Date: 6/8/2001 Company: Baker Hughes INTEQ Engineer: Tool: MWD,MWD - Standard Tied-to: . From: Definitive Path , , , ..... Annotation '::"MD,,: ~D,"', ::' "'": 11120.°0 8854.66 11745.00 8996.94 TD Survey ':',MD":" inei', i~ ::~ ~ :': ssTyD:, ,' N/S :i;,,:,, :, E~/~V' , MapN ";,:: ~i, MapE: , ~:, : DLS : VS ','i'~:, i: ,,:'i:';ff; ,::':'deg',,,,, ::fi; ,: fi'i,: [,' ",,':,",: ': :, :: ':':;', :, deg/tO0fi, , ,ft',: 11120.00 44.62 335.06 8854.66 8765.85 4331.41 -4216.19 5953132.51 640492.67 0.00 6043.40 11155.00 51.70 334.00 8877.99 8789.18 4354.93 -4227.41 5953155.81 640481.00 20.35 6067.91 11186.00 54.90 334.90 8896.51 8807.70 4377.36 -4238.12 5953178.02 640469.86 10.58 6091.29 11228.00 59.90 328.60 8919.15 8830.34 4408.46 -4254.90 5953208.80 640452.49 17.35 6125.08 11241.00 62.30 328.21 8925.43 8836.62 4418.16 -4260.86 5953218.37 640446.34 18.65 6136.13 11273.00 66.20 322.90 8939.34 8850.53 4441.90 -4277.17 5953241.79 540429.58 19.28 6164.42 11308.00 71.90 318.70 8951.86 8863.05 4467.20 -4297.64 5953266.69 640408.44 19.77 6196.89 11347.00 77.20 312.70 8962.25 8873.44 4494.06 -4324.08 5953293.04 640381.68 20.11 6234.44 11377.00 80.60 308.20 8968.03 8879.22 4513.14 -4346.48 5953311.69 640358.92 18.57 6263.79 11409.00 83.00 305.70 8972.59 8863.78 4532.18 -4371.79 5953330.23 640333.25 10.77 6295.18 11440.00 85.30 300.80 8975.75 8886.94 4549.08 -4397.57 5953346.63 640307.15 17.39 6325.40 11473.00 86.00 297.60 8978.26 8889.45 4565.13 -4426.29 5953362.12 640278.13 9.90 6357.11 11515.00 85.30 293.40 8981.44 8892.63 4583.15 -4464.08 5953379.42 640240.0.0 . . I0.11 6396.67 11551.00 86,00 289.20 8984.18 8895.37 4596.19 -4497.52 5953391.81 640206.32 11.79 6429.63 11581.00 87.60 285.70 8985.85 8897.04 4605.17 -4526.09 5953400.23 640177.59 12.81 6456.27 11622.00 87.80 281.10 8987.50 8898.69 4614.66 -4565.93 5953408.96 640137.58 11.22 6491.29 11670.00 85.30 276.50 8990.39 8901.58 4621.99 -4613.26 5953415.37 640090.12 10.89 6530.13 11704.00 64.90 272.70 8993.29 8904.48 4624.71 -4647.02 5953417.44 640058.31 11.20 6556.06 Obp Ii,' BP Amoco i' Baker Hughes INTEQ Survey Report INTEQ Comlmay: BP Amoco Date: 8/10/2001 Time: 14:32:51 Page: 2 Field: Pmdhoe Bay Co-ordlaat~gNE) Referemce: Well: Y-23, True Norlh Site: PB Y Pad Vertical (TVD) Refereace: 33: 23 6/111986 00:00 88.8 Wen: Y-23 Sectioa (rS) Refereac~. Well (0.00N,0.00E,314.62Azt) Welipat~: Y-23APB1 Sarvey Caicalatloa Metkod: Minimum Curvature Db: Oracle Survey MD lllci ~ ~ &.~TVD N/S F~W MapN Mapg DLS VS ff deg deg ff fl: ff ff ff ff deg/100ff fl: 11745.00 84.90 272.70 8996.94 8908.13 4626.63 -4687.81 5953418.58 640015.49 0.00 6586.45 AI, ASK& OIL AND GAS CONSERYA~ION COPl)tlSSION TONY KNOWLES, GOVERNOR 333 W. 7'~ AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Alistair Sherwood CT Drilling Engineer BP Exploration (Alaska) Inc. P O Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Unit Y-23A BP Exploration (Alaska) Inc. Permit No: 201-028 Sur Loc: 1372'SNL, 24'WEL, Sec. 33, T1 IN, R13E, UM Btmhole Loc. 2813'NSL, 1476'WEL, Sec. 29, T1 IN, R13E, UM Dear Mr. Sherwood: 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. Notice may be given by contacting the Commission petroleum field inspector on the North Slope pager at 659-3607. Sincerely, Daniel T. Seamount, Jr. Commissioner BY ORDER OF THE COMMISSION DATED this ~ a ~ day of February, 2001 dlf/Enclosures cc: Department ofFish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/o encl. .~ STATE OF ALASKA ~ - "~-'¢ ''~ G/..,_i°~'' A~SK4 IL AND GAS CONSERVATION COM, SION . PERMIT TO DRILL 20 ~C 25.005 [] Drill [] Reddll 1 lb. Type of well [] Exploratory E] .Stratigraphic Test [] Development Oil la. Type of work [] Re-Entry [] DeepenI [] Service [] Development Gas ..Jl~"Si?tg. Je Zone[] Multiple Zone 2. Name of Operator 5. Datum Elevation (DF or KB) 10. Field and Pool BP Exploration (Alaska) Inc. KBE = 88.81' Prudhoe Bay Field / Prudhoe 3. Address 6. Property Designation Bay Pool P.O. Box 196612, Anchorage, Alaska 99519-6612 e~'f~2'L~22~ ADL 028288 4. Location of well at surface 7. Unit d~ Property Name 11. Type Bond (See 20 AA(::; 25.025) 1372' SNL, 24' WEL, SEC. 33, T11N, R13E, UM Prudhoe Bay Unit At top of productive interval 8. Well Number 3047' NSL, 4272' WEL, SEC. 28, T11N, R13E, UM Y-23A Number 2S100302630-277 At total depth 9. Approximate spud date 2813' NSL, 1476' WEL, SEC. 29, T11N, R13E, UM 02/23/01 Amount $200,000.00 12. Distance to nearest property line 113. Distance to nearest well 14. Number of acres in property 15. Proposed depth (MD and TVD) ADL 028287, 1476' MDI No Close Approach 2560 13882' MD / 8933' TVD 16. To be completed for deviated wells 17. Anticipated pressure {see 20 AAC 25.035 (e) (2)} Kick Off Depth 11190' MD Maximum Hole Angle 100 o Maximum surface 2594 psig, At total depth (TVD) 8800' / 3650 psig 18. Casing Program Specifications Setting Depth Size Top Bottom Quantity of Cement Hole Casin,q Weiqht Grade Couplinq Len,qth MD TVD MD TVD (include sta,qe data) 3-3/4" 2-7/8" 6.16# L-80 ST-L 3829' 10053' 8029' 13882' 8933' 180 cuft Class 'G' 19. To be completed for Redrill, Re-entry, and Deepen Operations. ~ ~.. ~ ~ ' Present well condition summary Total depth: measured 11650 feet Plugs (measured) ~k~ ~'9 ~-"'-- true vertical 9209 feet Effective depth: measured 11350 feet Junk (measured) ~ ~$_ ¢u0~$- true vertical 9015 feet i~Beo~(~O\~ Casing Length Size Cemented MD TVD Structural Conductor 110' 20" x 30" 8 cu yds Concrete 110' 110' Surface 2780' 13-3/8" 3902 cuft Permafrost 2817' 2701' Intermediate Production 10293' 9-5/8" 572 cuft Class 'G' 10330' 8310' Liner 1597' 7" 400 cuft Class 'G' 10053' - 11650' 8117' - 9209' Perforation depth: measured Open: 11112' - 11137', 11259' - 11315' Squeezed: 11103'- 11112', 11137'- 11141', 11315'- 11384', 11396'- 11420' true vertical Open: 8849' - 8867', 8953' - 8991' Squeezed: 8843' - 8849', 8867' - 8870', 8991' - 9038', 9046' - 9062' 20. Attachments [] Filing Fee [] Property Plat [] BOP Sketch [] Diverter Sketch [] Drilling Program [] Drilling Fluid Program [] Time vs Depth PIct [] Refraction Analysis [] Seabed Report [] 20 AAC 25.050 Requirements Contact Engineer Name/Number: Alistair Sherwood, 564-4378 Prepared By Name/Number: Terrie Hubble, 564-4628 '~i. I hereby certify that the fore~oin~¢.c/is true4~' correct tCthe best of my knowledge d~/' /' ,r .. S gned Alistair Sherwood ~ ..~-,.0¢'¢1'~(_~ Title CT Dr, ll~ng Engineer Date :..:.'.;' :...:'.."...:."' ;;:...':.: ..... :::. ';.;:"..'::.::.:':...? :'.'.;'.. "..'.i:;.;!':.::. :.'::i:..'?;'.'::: :":':':.';:":."': :~:;:;~i~m~i~i~'n~Use:~y~:~:~:~:~i~i~:~;:~:i~,~..~.~!~i'?.~: ::!i.:.i:;::i ';:.::"} :i'~;~~i~~'.!~.~:~.;.?`~:!~~;!~;~.::.~?;?.!;~~~:!~:.!!;:!:.'.:.~.!...;~!.;i.~~~~~}.:;:.~~''~~.:.~. Permit N~/- ~') ?--'~-~ I APl Number I Approval Date I See cover letter ""- 50-029-21590-01 ¢-~ - C'~ -~) / for other requirements Conditions of Approval: Samples Required [] Yes _~]'No Mud Log Required [] Yes .]~"No Hydrogen Sulfide Measures .J~/Yes [] No Directional Survey Required [2['Yes [] No Required Working Pressure for ROPE [] 2K [] 3K [] 4K [] 5K [] 10K [] 15K ~i~.3.5K psi for CTU Other: '...,.,....~.:. :, r,,~.~...i., d,,G;r', .t{:';...} Approved By ,", "r ~;,;¢o~' Se~::~m. oum by order of ~ .... Commissioner the commission Date Form 10-401 Rev. 12-01-85 Submit In Triplicate BPX, Y23 Sidetrack, Stack Question ,,; Subject: BPX, Y23 Sidetrack, Stack Question Date: Mon, 5 Feb 2001 19:10:33 -0000 From: "Sherwood, Alistair" <SherwooA@BP.com> To: "'tom_maunder@admin.state.ak. us'" <tom_maunder@admin.state.ak. us> Toms With reference to your voice mail question on Friday. You are correct, we will be installing 2.7/8" pipe/slips in the bottom TOT, (Texas Oil Tools) dual gate BOPE. Regards Alistaix Sherwood Coil Tubing Drilling Engineer Sherwood, Alistair <SherwooA~BP.com> Coil Tubing Drilling Engineer bp Exploration Alaska Drilling & Wells I of 1 2/5/01 11:09 AM BPX Y-23 Sidetrack Summary of Operations: Y-23 is currently producing 200bbls/d @ 85% watercut. Y-23a will sidetrack to the west through zone 4 to access undrained oil. Before sidetracking, the existing perforations will be plugged & abandoned. When drilled Y-23a will be completed with a cemented solid liner. Specific prep work, (Phase 1) and drilling, (Phase 2) operations are detailed below. Phase 1: Liquid pack IA, Kill well, Set whipstock, P&A perforations, Mill window: Planned for Feb. 15-18, 2001 · A dummy whipstock drift & PDS caliper survey will be run. · The inner annulus & tubing will be circulated to seawater & dummy valves set in the gas lift mandrels. · E-Line will set the whipstock at approx. 11270' · Service coil will spot 6 bbls of cement to P&A the existing perfs. · Service coil will mill the window. Phase 2: Drill and Complete sidetrack: Planned for Feb 23, 2001 Drilling coil will be used to drill and complete the directional hole as per attached plan. The lateral will be completed with a solid liner, cemented with 32 bbls of cement. Approx 600' of liner will then be perforated overbalanced using coil tubing deployed guns. Top of 2 7/8" liner to be approx. 10,053' MD. Mud Program: · Phase 1: Seawater · Phase 2: Seawater and FIo-Pro (8.6 - 8.7 ppg) Disposal: · No annular injection on this well. · All drilling and completion fluids and all other Class II wastes will go to Grind & Inject. · All Class I wastes will go to Pad 3 for disposal. Casing Program: · 2 7/8", 6.16#, L-80, ST-L cemented solid liner will be run from 10,053' to TD · at approx. 13,882' MD. Well Control: · BOP diagram is attached. · Pipe rams, blind rams and the CT pack off will be pressure tested to 400 psi and to ~'09e-psi.--'" '/1'5 · The annular preventer will be tested to 400 psi and 2000 psi. Directional · See attached directional plan · Magnetic and inclination surveys will be taken every 30 ft. No gyro will be run. REC'EIVED Logging · An MWD Gamma Ray log will be run over the open hole section. · A real time Resistivity log will be run while drilling. JAN 2 9 2001 Alaska 0il & Gas Cans. ~,~mmiss]011 Anchorage Hazards H2S was measured at 70 ppm on Jun 6, 2000. Three faults with lost circulation potential will be crossed. The first to be encountered is the highest risk fault. The planned sidetrack length is 2700 ft. Reservoir Pressure Res. press, is estimated to be 3650 psi at 8800ss. Max. surface pressure with gas (0.12 psi/ft) to surface is 2594 psi. TREE = 4" ClW WELLHEAD= MCEVOY ACTUATOR= AXELSON 'k§'i'"~'E~";- 88.8i' 'i~i5'i"~''':: 37.6 KOP = 1300' Ma'X',~,'r~'ie:~ 5i @ 11600' Datum MD = Datum 'I'VD= 113.3/8CSG'72#'L80''1480bpf'ID=12'347 Id 2817' IMinimum ID = 3.725" @ 10059' 4-1/2" PARKER SWN NIPPLE ITOPOF 7" LINER Id 10053' 14-1/2" TBG, 12.6#, 13Cr, .0152 bpf, ID:3.958 Id 10072' 19-5/8" CSG, 47#, L80, .0732 bpf, ID=8.681 Id 10330' PERFORATION SUMMARY REF LOG: SWS-BHCS, 6/17/86 a NO L ~...~.~.,¥6~,~i.~,i ............. I I Note: Refer to Production DB for historical perf data SIZE SPF INTERVAL Opn/Sqz DATE 2-1/8 4 11103-11141 S 12/5/91 3-3~8 6 11112-11137 O 2/25/92 3-3/8 6 11259-11290 O 1/10/92 3-3/8 6 11290-11315 O 2/12/92 2-1/8 4 11315-11384 S 12/5/91 2 4 11396-11420 S 12/5/91 I ~DI-I 11350'I 17" LNR, 26#, L80, .0382 bpf, ID=6.276 Id 11650' Y-23 SAFETY NOTES 2198' ]-~4-1/2" OTIS SSSV LANDING NIP, ID=3.813 I GAS LIFT MANDRELS 6 I 32031 29041 431 CAMCO I 5 I 5~s21 48321 421CAMCO __1 4 17598161521 431 CAMCOI R~ ] I 3 I 8~621 ~°231 3~I CA~O I 2 I 94s61 7s~31 3zI CA,CO I 1 I 9915I 79291 431 CAMCO I RE I 9942' 9950' 10010' 1~4-1/2" PARKERSWS NIP, ID=3.813 I I--19-5/8,, x 4-1/2" OTIS MHR PKR, ID:3.85 I-~4-1/2" PARKER SWS NIP, ID=3.813 I --J 10059' I--~4-1/2" PARKER SWN NIP, ID=3.725 10072' ]-~4-1/2 PKRWLEG, ID:3.958 I I ~436' I-I ~RKER JOINT I DATE REV BY COMMENTS 06/24/86 ORIGINAL COMPLETION 12/27/91 RKH POST RWO COMPLETION 01/05/01 SIS-SLT CONVERTED TO CANVAS PRUDHOE BAY UNIT WELL: Y-23 PERMIT No: 186-0870 APl No: 50-029-21590 Sec, 33, TN 11N, RGE 13E BP Exploration (Alaska) TREE: 4" CIW WELLHEAD: McEVOY ACTUATOR: AXELSON ( '-23a Proposed Completion( KB. ELEV = 88.81' BF. ELEV -- 37.60' 4 1/2" SSSV LANDING NIPPLE( OTIS)( 3.813" ID) I 2108'1 CMT'd 133/8", 72 #/~,~1 2817'1~ ~ L-80, BTRS kOP:1300' MAX ANGLE: 51° @ 11,600' 4 1/2" 12.6# 13 CHROME TDS TUBING ID: 3.958" CAPACITY: 0.0152 BBL/FT GAS LIFT MANDRELS ( CAMCO w/RK LATCH) N° MD(BKB) TVDss DEV 6 3203' ;~904' 4 3° 5 5782' 4832' 4 .~o 4 7598' 6152' 4 3° 3 8762' 7023' 3 )° 2 9456' 7573' 3 ,° 1 9915' 7929' 4 3° 13 CHROME TUBING DO NOT ACIDIZE!!!!! 4 1/2" SWS- NIPPLE I I (PARKER) (3.813" ID) 9942'I 9 5/8" OTIS PACKER ! 9950'1 (MHR) ( 3.850 "lB) TOP OF I o,os 'l LINER 9 5/8", 47#/ft, 110,330,I L-80, BTRS Whipstock to be set at approx. 11270'. Cement past whipstock to sqz. all existing perfs PERFORATION SUMMARY REF. LOG: SWS- BHCS 6-17-86 TIE-IN LOG: SWS - CBL 6-22-86 SIZE I SPF I INTERVAL 2 1/8', 4 133/81 6I 13 3/8;'J 6 I 13~/Sl 6I I~ ~/~"1 ~1 11,103- 11,141' 11,112- 11,137' 11,259 - 11,290' 11,290 - 11,315' 11,315 - 11,384' 11,396 - 11,420' OPEN/SQZ'D SQZD/12-5-91 OPEN/2-25-92 OPE N/1-10-92 OPEN/2-12-92 SQZD/12-5-91 SQZD/12-5-91 PBTD 111,350'1 7", 26 #/ft, L-80, TC4S I 11,650'1 4 1/2 .... SWS" NIPPLE (PARKER) (3.813" ID) 4 1/2 .... SWN" NIPPLE (PARKER) (3.725" ID) 4 1/2" WLEG 11O,OLO'1 1 0,059'1 0,072' (PARKER) (3.958" ID) (ELMD) I 10,072' 3 3/16" x 2 7/8" fully cemented liner to provide future Tiny Tool sdtrk, access. rel M5 Vertical Section 0 500 8700 ~ 8750 880O 8850 8900 8, 8950 + ~ 8,966 90O0 - 1,000 Y-23 Path Distance (Feet) 1,500 2,000 2,500 3,000 3,500 4,000 ! t I Y-23a case 103 Nov. 20, 2000 Ted x4694 This plan, case 103, assumes a KOP in the Shublik. Angle @ K.O.= 45 deg MD:11190 Tot Drld:2692 ft 13882 TD Marker Depths ~Drig Wellbore 8,9271 8,9271fi. TVD TSAD I 8,8661ft TVD Kick Off J 8,8151fl TVD 11,190Jrt MD Deprtr @KO 6,106 fi- I MD KO Pt 11,190I MD New Hole 2692I I Total MD 13,882I TVD TD 8,9331 DLS deg/100 Tool Face Length Curve 1 ' 32 -25 1~10 Curve 2 10 -90 679 :Curve 4 10 90 299 Curve 5 10 -90 299~ Curve 6 10 0 56' Curve 7 10 90 180 Curve 8 2 -90 1,039 2,692 Drawn: ######### 11:03 Plan Name: Case 122 Y-23 6,500 6,000 Y-23a Case 103 Nov. 20, 2000 Ted x4694 5,500 5,000 3,500 3,000 ~ ~ . I i J 2,500 I -7,000 -6,500 -6,000 -5,500 -5,000 -4,500 -4,000 X distance fromSfc Loc 0 JWell Name Y-23 J CLOSURE JDistance 7,936 ft Az 301 deg NEW HOLE E/W (X) N/S (Y) Kick Off -4,320 4,294 TD -6,820 4,058 State Plane 637,971 5,952,941 Surface Loc 644,791 5,948,883 DLS deg/100 Tool Face Length Curve 1 " 32 -25 1~10 Curve 2 10J -90 679 Curve 4 10i 90 299 Curve 5 10 -90 299 Curve 6 10 0 56 Curve 7 10 90 180 Curve 8 2 -90 1,039 2,692 Drawn: ######### 11:03 Plan Name: Case 122 CDR1 Drilling Wellhead ?~tail Y-23a - 21.10' 16. 19.30' Rig Floor 5.59' ~0'1 65' Dual T.O.T. 5,000 psi W.P. R~[n Type Dual Gate BOPE ~ CT Injector Head Otis Q.C. thread half Traveling plate 5-1/2" lubricator Jacking Frame Top Stationary Plate Annular BOP (Hydril),7-1/16" ID Annular BOP (Hydril),7-1/16" ID blind / shearI Top Bottom 2" pipes Kill Line ____~Top 2" pipe / slips Btm 2 3/8" pipe / slips Manual Master Valve -- Tubing Hanger 9-5/8" Annulus 0.66' Rig Matt Ground Level 13-3/8" Annulus STATE OF ALASKA ALASK/X{ '_ AND GAS CONSERVATION COMk( ~ION APPLICATION FOR SUNDRY APPROVAL 1. Type of Request: [] Abandon [] Suspend [] Plugging [] Time Extension [] Perforate [] Alter Casing [] Repair Well [] Pull Tubing [] Variance [] Other [] Change Approved Program [] Operation Shutdown [] Re-Enter Suspended Well [] Stimulate Plug Back for Sidetrack 2. Name of Operator BP Exploration (Alaska) Inc. 3. Address P.O. Box 196612, Anchorage, Alaska 99519-6612 4. Location of well at surface 1372' SNL, 24' WEL, SEC. 33, T11N, R13E, UM At top of productive interval 3047' NSL, 4272' WEL, SEC. 28, T11N, R13E, UM At effective depth 3107' NSL, 4300' WEL, SEC. 28, T11N, R13E, UM At total depth 3315' NSL, 4396' WEL, SEC. 28, T11N, R13E, UM 5. Type of well: [] Development [] Exploratory [] Stratigraphic [] Service 6. Datum Elevation (DF or KB) KBE = 88.81' 7. Unit or Property Name Prudhoe Bay Unit 8. Well Number Y-23 9. Permit Number 186-087 10. APl Number 50- 029-21590-00 i11. Field and Pool Prudhoe Bay Field / Prudhoe Bay Pool 12. Present well condition summary Total depth: measured 11650 feet Plugs (measured) true vertical 9209 feet Effective depth: measured 11350 feet Junk (measured) true vertical 9015 feet Casing Length Size Cemented MD TVD Structural Conductor 110' 20" x 30" 8 cu yds Concrete 110' 110' Surface 2780' 13-3/8" 3902 cu ft Permafrost 2817' 2701' Intermediate Production 10293' 9-5/8" 572 cu ft Class 'G' 10330' 8310' Liner .1597' 7" 400 cu ft Class 'G' 10053' - 11650' 8117' - 9209' Perforation depth: measured Open: 11112' - 11137', 11259' - 11315' Squeezed: 11103' - 11112', 11137' - 11141 ', 11315' - 11384', 11396' - 11420'~ true vertical Open: 8849' - 8867', 8958' - 8991' Squeezed: 8843'- 8849', 8867'-8870', 8991'- 9038', 9046'- 9062' 2 9 2001 Tubing (size, grade, and measured depth) 4-1/2", 12.6#, 13Cr to 10072' Ala$/~a ?ii &l ~,as co~s' Packers and SSSV (type and measured depth) 9-5/8" Otis 'MHR' packer at 9950'; Otis SSSV Landing Nipple a 2 Ji~Chorage 13. Attachments [] Description Summary of Proposal 14. Estimated date for commencing operation February 15, 2001 16. If proposal was verbally approved Name of approver Date Approved Contact Engineer Name/Number: Alistair Sherwood, 564-4378 [] Detailed Operations Program [] BOP Sketch Status of well classifications as: [] Oil [] Gas [] Suspended Service Prepared By Name/Number: Terrie HUbble, 5644628 17. I hereby certify that the for ~egoin,0 is true.~3hd corre(It to the best of my knowledge · / I Signed ....~. . ,/~..L//,· ',' ~/,/,~._._A Title CT Drilling Engineer Date I Al~stair ~ne~ooa ~t~ 1~/" ~ ~~ ~ / / I ~.~1~' f ~ t . ' ~:; ~ ~ . ~$,.~;:~ ?,: ..... .-...;..,-;,.:.~ :. ~... :. ,~.,-~.,?- :,, -?:?,~,~-~ .~ .~z- ...... ~:' ,,~. ,~ ~'. ~.~ ~:~ ...... ~: .,,: ~.. ~:':'., ~ ~.~.,~-':~ ~.~'~ ~;~;:' ~ ~..~:~ ~'; ~. '~ ~'[~ :~= ':-:. ',?. Plug integri~ ~ ~. BOP Test _ ~ Location clearance ~ [ Mechanical Integrity Test Subsequent form required 10- lApproved b~'order of the Commission Commissioner Date Form 10-403 Rev. 06/15/88 Submit In Triplicate .H DATE ~80967 INVOICE / CREDIT MEMO CK122100~ :OMMENTS: Per NG INST: S/H 122100 PYMT HANDL DESCRIPTION nit To Drill - Terrie Hub --ee I~le GROSS 100.00 X4628 DISCOUNT VENDOR ALASKAO I LA O..__ ___ _ O NET 100.00 THE AI'rACHED CHECK IS IH PAYMENT FOR f'rEME DESCRIBED ABOVE. H ' ';~;;'~;.' "':~;:':-.::~}~:? :; :~: '?:: ~::'':;~:;"~:;-:: :;?--'-:'::::~;;;;::' ':.:~? ';'??;:~?.[':' DATE '::;;~::';:;:;~.; "~:':.;;;".';:"-:'~: :'. '";';'AMOUNT ::-;;~:-~e :;~:;~';~; ::";-~;:; ~;~;:~3~' ;~EST 7TH:;~'~E~U~;::i;::': ~UI:~::::~:::?I O0 ?;:.;;:~;'.~ '?'": .:..::?:; ::~.. ~:- :.'-;;;;..~-:.~'.-' ~. :.~~'~:¢. ~:~"';:~::'~:..:;:'..' :-"::~;:-.: ANCHORAGE AK ~9501 ~ ,,I I [] r'! D I" "],,! i"rl !. 1 2N :1,¢. q q,_' NNI:i, I_ I_ t C:~ll! WELL PERMIT CHECKLIST COMPANY /~ ~'~ WELL NAME %Z,~,,~ PROGRAM: exp FIELD & POOL ~ ,~/._~-'-~ INIT ~-'L~SS" _~(j' /~...~/~ GEOL AREA ADMINISTRATION APPR DATE 1. Permit fee attached ....................... 2. Lease number appropriate-,~-...5'~.. ;t .~,;,,/Tm-~/./z~- 5/~;/.' . 3. Unique well name and number .................. 4. Well located in a defined pool .................. 5. Well located proper distance from drilling unit boundary .... 6. Well located proper distance from other wells .......... 7. Sufficient acreage available in drilling unit ............ 8. If deviated, is wellbore plat included ............... 9. Operator only affected party ................... 10. Operator has appropriate bond in force ............. 11. Permit can be issued without conservation order ........ 12. Permit can be issued without administrative approval ...... 13. Can permit be approved before 15-day wait ........... ENGINEERING 14. Conductor string provided ................... 15. Surface casing protects all known USDWs ........... 16. CMT vol adequate to circulate on conductor & surf csg ..... 17. CMT vol adequate to tie-in long string to surf csg ........ 18. CMT will cover all known productive horizons .......... 19. Casing designs adequate for C, T, B & permafrost ....... 20. Adequate tankage or reserve pit ................. 21. If a re-drill, has a 10-403 for abandonment been approved... 22. Adequate wellbore separation proposed ............. 23. If diverter required, does it meet regulations .......... dev v/ redrll /,,'/' serv wellbore seg ann. disposal para req _~-'~'~_.~ UNIT# K__~//.~. ~--~ ON/OFF SHORE C/~,~ -,N GEOLOGY 'J A,F:'.~P~j~ DATE 33. (..~/. c~ ( 34. 24. Drilling fluid program schematic & equip list adequate ...... N 25. BOPEs, dO they meet regulation ........ _._~ ...... N 26. BOPE press rating appropriate; test to '5,,,%0r,-.) pstg. 27. Choke manifold complies w/APl RP-53 (May 84) ........ 28. Work will occur without operation shutdown ........... ...... ~- , L"x -- - ~,~ 29. Is presence of H2S gas probable ............ ..... y 30. Permit can be issued w/o hydrogen sulfide measures ..... y~ 31. Data presented on potential overpressure zones ....... /, y~~' 32. Seismic analysis of shallow gas zones ............. ,~ N Seabed condition survey (if off-shore) .......... ~ Y N Contact name/phone for weekly progress reports [expJofatory only] Y N ANNULAR DISPOSAL35. With proper cementing records, this plan (A) will contain waste in a suitable receiving zonei ....... Y N APPR DATE (B) will not contaminate freshwater; or cause drilling waste... Y N to surface; (C) will not impair mechanical integrity of the well used for disposal; Y N (D) will not damage producing formation or impair recovery from a Y N pool; and (E) will not circumvent 20 AAC 25.252 or 20 AAC 25.412. Y N GEOLOGY: ENGINEERING: UIC/Annular ,/..~J..) TE~ ~ , ',"'-" "1 [' COMMISSION: Comments/Instructions: Z 0 -I rtl c:\msoffice\wordia n\diana\checklist (rev. 11/01//00) Well Histo.ry 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 APPEN. DIXi No'special'effort has been made to chronologically '.. organize this category of information. **** REEL HEADER **** MWD 01/12/14 BHI 01 LIS Customer Format Tape **** TAPE HEADER **** MWD 01/12/5 168207 01 1.75" NaviGamma - Gamma Ray RECEIVED DEC i 9 2001 Oil & Gas Cons, Cornmi~on ,~chorage *** LIS COM~ENT RECORD *** !!!!!!!!!!!!!!!!!!! Remark File Version 1.000 !!!!!!!!!!!!!!!!!!! Extract File: glen.las -Version Information VERS. 1.20: CWLS log ASCII Standard -VERSION 1.20 WRAP. NO: One line per frame -Well Information Block Data Type Information ~MNEM.UNIT STRT.FT STOP.FT STEP.FT NULL COMP WELL FLD LOC CNTY STAT SRVC TOOL DATE API 11131.0000: Starting Depth 12733.0000: Ending Depth 0.5000: Level Spacing -999.2500: Absent Value COMPANY: BP EXPLORATION WELL: Y-23APB2 FIELD: Prud_hoe Bay Unit LOCATION: 1372' SNL, 24' WEL COUNTY: North Slope STATE: Alaska SERVICE COMPANY: Baker Hughes INTEQ TOOL NAME & TYPE: 1.75" NaviGamma - Gamma Ray LOG DATE: 07-Jun-01 API NYUMBER: 500292159071 ~Parameter Information Block #MNEM.UNIT Value Description SECT. 33 : Section TOWN.N llN : Township RANG. 13E : Range PDAT. MSL : Permanent Datum EPD .F 0 : Elevation Of Perm. Datum LMF . DF : Log Measured from FAPD.F N/A : Feet Above Perm. Datum DMF . DF : Drilling Measured From EKB .F 88.81 : Elevation of Kelly Bushing EDF .F N/A : Elevation of Derrick Floor EGL .F N/A : Elevation of Ground Level CASE.F N/A : Casing Depth OS1 . DIRECTIONAL : Other Services Line 1 ~Remarks (1) Ail depths are Measured Depths (MD) inless otherwise noted and are tied into Schlumbergers Borehole Compensated Sonic, 17 June 1986. (2 Gamma ray and resistivity data from 11409 to 11135 ft were logged after drilling while pumping out of the hole on coil tubing at a speed of 180 ft/hr. This section was logged on run 7, Y-23A PB1, 28 hours after the formation was initially drilled. (3 The well Y-23A PB2 was inadvertantly sidetracked at 11409 ft MD (8884 ft SSTVD) on RWD run 12, from well Y-23A PB1. (4 Log data presented from 11409 ft MD (8884 ft SSTVD) COMMENCED FRO5 (5) (6) plugged back (7) (8) MBFD-LWD Run 12. The interval from 12090 ft. to 12551 ft (8934 ft to 8924 ft SSTVD) was logged while running in the hole approximately 48 hours after the formation was initially drilled. The MPR tool had been left out of the BHA due to poor hole conditions and the NaviGamma MWD tool run in its place. After reaching a total depth of 12733 ft MD (8917 ft SSTVD)the well was and side tracked again due to unacceptable mud losses. The data presented here is final. The data has not been depth shifted to a PDC (Primary Depth Control). as per BPX request, the MWD Gamma ray is the PDC for this borehole. MNEMONICS: GR~ - > TVD - > ROPS -> RPCHM - > RPCLM - > RACHM - > RACLM - > TCDM - > RPTHM - > Natural Gamma Ray RWD-API [RWD] (RWD-API units) Subsea True Vertical Depth (SSTVD), feet Rate of Penetration, feet/hour Resistivity (PD) 2 MHz Compensated and Borehole Corrected [RWD] (Ohm-m) Resistivity (PD) 400 MHz Compensated and Borehole Corrected [RWD] (Ohm-m) Resistivity (AT) 2 MHz Compensated and Borehole Corrected [RWD] (Ob_m-m) Resistivity (AT) 400 MHz Compensated and Borehole Corrected [RWD](Otun-m) CDS Temperature [RWD] (deg F) Time Since Drilled, [RWD], minutes Data density is shown by the tick marks on the right hand side of the depth track. SURFACE EQUIPMENT: Main Surface system software: MSS4 version 4.03 Memory dump system software: D-Series rev 1.03/PowerComms rev 1.0 DOWNHOLE EQUIPMENT Natural Gamma Ray sensor: Nal Scintillation counter USMPR Resistivity: 2 MHz and 400 kHZ electromagnetic wave RWD Memory update rates: Garama Ray 10 seconds :USMPR Resistivity 5 seconds Note: Each of the resistivity measurements has an upper limit to its measurement specification. Above these values the traces can show an exaggerated response. 2 MHz Resistivity from Phase Difference 3000 Ohm-m 2 MHz Resistivity from Attenuation 500 Ob_m-m 400 KHz Resistivity from Phase Difference 1000 Ohra-m 400 KHz Resistivity from Attenuation Difference 200 Ohra-m LOG ENVIROMMENTAL CORRECTIONS: Gamma Ray: Corrected for sensor type and collar size. No correction has been applied for nominal hole size, mud weight or potassium content. Resistivity: Corrected for tool size, nominal hole size and mud resistivity. Compensated readings obtained by use of dual water based polymer mud used to drill this hole section. Rm at BHCT 0.1 ob_mm. SENSOR OFFSETS: RUN Resistivity GAMMA DIRECTIONAL 7 24.15 ft. 17.22 ft. 40.73 ft. 12 24.19 ft. 17.26 ft. 40.77 ft. 13 23.74 ft. 16.81 ft. 40.32 ft. 17 23.76 ft. 16.83 ft. 40.34 ft. Tape Subfile: 1 104 records... Minimum record length: Maximum record length: 8 bytes 132 bytes **** FILE HEADER **** MWD .001 1024 *** INFORMATION TABLE: CONS MNEM VALU WDFN mwd.xtf LCC 150 CN BP EXPLORATION WN Y-23APB2 FN Prudhoe Bay Unit COUN North Slope STAT Alaska *** LIS COMMENT RECORD *** !!!!!!!!!!!!!!!!!!! Remark File Version 1.000 1. The data presented has is final. 2. The data has not been depth shifted to a PDC (Primary Depth Control). As per BPX instructions, the MWD Gamma ray is the PDC for this Borehole. *** INFORMATION TABLE: CIFO MNEM CHAN DIMT CNAM ODEP GR GR GRAX 0.0 ROP ROP ROPS 0.0 RACL RACL RACLM 0.0 RACH RACH RACHM 0.0 RPCH RPCH RPCHM 0.0 RPCL RPCL RPCLM 0.0 TCDM TCDM TCDM 0.0 RPIH RPIH RPIHM 0.0 RPTH RPTH RPTHM 0.0 FORMAT RECORD (TYPE# 64) Data record type is: 0 Datum Frame Size is: 40 bytes Logging direction is down (value= 255) Optical Log Depth Scale Units: Feet Frame spacing: 0.500000 Frame spacing units: [F ] Number of frames per record is: 25 One depth per frame (value= 0) Datum Specification Block Sub-type is: FRAME SPACE = 0.500 * F ONE DEPTH PER FRAME Tape depth ID: F 9 Curves: Narae Tool Code Samples Units Size 1 GR MWD 68 1 2 ROP MWD 68 1 3 RACL COMP 68 1 4 RACH COMP 68 1 5 RPCH COMP 68 1 6 RPCL COMP 68 1 7 TCDM COMP 68 1 8 RPIH COMP 68 1 9 RPTH COMP 68 1 API F/HR Length 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 36 Total Data Records: 129 Tape File Start Depth = 11131.000000 Tape File End Depth = 12733.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet **** FILE TRAILER **** Tape Subfile: 2 145 records... Minimum record length: Maximum record length: 54 bytes 4124 bytes **** TAPE TRAILER **** MWD 01/12/5 168207 01 **** REEL TRAILER **** MWD 01/12/14 BHI 01 Tape Subfile: 3 2 records... Minimum record length: 132 bytes Maximum record length: 132 bytes Tape Subfile 1 is type: LIS Tape Subfile 2 is type: LIS DEPTH GR ROP RPCH RPCL TCDM RACL RPIH RACH RPTH 11200.0000 121.7820 -999.2500 11.7330 13.6370 17.0050 13.4930 158.9000 160.0000 0.000( 11131.5000 -999.2500 -999.2500 0.9600 4.8140 -999.2500 3.2720 -999.2500 -999.2500 -999.2500 11131.0000 -999.2500 -999.2500 0.9600 4.8140 -999.2500 2.1340 -999.2500 -999.2500 -999.2500 11300.0000 158.6780 -999.2500 38.9850 75.1330 80.5640 71.3300 158.9000 395.9240 0.0000 11400.0000 132.1820 -999.2500 8.9290 9.9320 10.0720 9.6750 162.5000 659.0000 0.0000 11500.0000 35.8780 85.7560 9.5650 10.0570 10.3430 9.9160 162.5000 1207.5000 22.0000 11600.0000 21.3480 149.0830 7.0480 7.3650 7.1140 7.0380 162.5000 1836.5000 37.0000 11700.0000 32.7890 94.8640 5.7300 5.4800 4.5620 4.9940 162.5000 2531.5000 27.0000 11800.0000 89.5080 52.8850 7.2810 6.9580 165.8750 6.2390 3231.5000 7.0300 60.0000 11900.0000 36.5060 97.3920 4.4620 3.9970 3.9970 4.0040 165.8750 3954.5000 13.0000 12000.0000 31.7270 68.7730 5.2600 5.6510 5.3360 5.4040 165.8750 4613.5000 27.0000 12100.0000 30.3320 79.1200 5.1260 4.9910 4.2540 4.7710 173.7390 5296.3047 -999.2500 12200.0000 47.9790 141.9090 6.2360 6.1700 -999.2500 12300.0000 30.5090 85.8550 5.9140 6.8090 -999.2500 12400.0000 29.1940 67.2000 8.0560 6.9780 -999.2500 12500.0000 19.0660 80.3190 3.8000 3.4450 131.3470 12600.0000 88.5450 46.8010 12.1600 15.2550 113.2250 12700.0000 35.2520 101.9970 10.1270 -999.2500 127.2870 12733.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 6.2020 5327.0000 8.5240 5367.3311 6.0480 5404.7090 3.5110 5546.8066 6.3570 5998.0000 -999.2500 6682.5000 -999.2500 -999.2500 Tape File Start Depth = 11131.000000 Tape File End Depth = 12733.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet Tape Subfile 3 is type: LIS 6.3590 -999.2500 7.4470 -999.2500 6.5960 -999.2500 3.2920 -999.2500 25.7750 68.0000 -999.2500 20.0000 -999.2500 -999.2500 **** REEL HEADER **** MWD 01/12/10 BHI 01 LIS Customer Format Tape **** TAPE HEADER **** MWD 01/12/10 168207 01 1.75" NaviGamma - Gamma Ray LIS COMMENT RECORD *** !!!!!!!!!!!!!!!!!!! Remark File Version 1.000 !!!!!!!!!!!!!!!!!!! Extract File: glen.las -Version Information VERS. 1.20: CWLS log ASCII Standard -VERSION 1.20 WRAP. NO: One line per frame -Well Information Block Data Type Information #MNEM.UNIT STRT.FT 10313.0000: STOP.FT 11781.0000: STEP.FT 0.5000: NULL -999.2500: COMP COMPANY: WELL WELL: FLD FIELD: LOC LOCATION: CNTY COUNTY: STAT STATE: SRVC SERVICE COMPANY: TOOL. TOOL NAME & TYPE: DATE. LOG DATE: API . API NYLIMBER: ~Parameter Information Block #MNEM.UNIT Value SECT. 33 TOWN.N llN RANG. 13E PDAT. MSL EPD .F 0 LMF . DF FAPD.F N/A DMF . DF EKB .F 88.81 EDF .F N/A EGL .F N/A CASE.F N/A OS1 . DIRECTIONAL -Remarks Starting Depth Ending Depth Level Spacing Absent Value BP EXPLORATION Y-23A Prudhoe Bay Unit 1372' SNL, 24' WEL North Slope Borough Alaska Baker Hughes INTEQ 1.75" NaviGan~ma - Gan~na Ray 22-Jun-01 500292159001 Description Section Township Range Permanent Datum Elevation Of Perm. Datum Log Measured from Feet Above Perm. Datum Drilling Measured From Elevation of Kelly Bushing Elevation of Derrick Floor Elevation of Ground Level Casing Depth Other Services Line 1 (1) Ail depths are Measured Depths (MD) unless otherwise noted and are tied into Schlumbergers Borehole Compensated Sonic, 17 June 1986 (see GRTI curve, the last tie in was done the 22nd of June, + 9 ft correction applied before the beginning of the logging). (2) Baker Hughes INTEQ runs 18-24 ulilized directional and garm~a ray services to drill this section from 11186 to 11781 ft MD (8808 to 8896 ft SSTVD) in 3 3/4" hole. Run 25 was a mad pass logged once TD was reached. Therefore no "time since drilled" parameter was plotted. (3) All gamma ray and resistivity data shown here were logged after drilling while pumping out of the hole on coil tubing at a speed of Control) 120 ft/hr. KCL Brine was used to drill this section while logging. The brine resistivity was 0.14 Ob_mm at BHCT. The data presented here is final. The data presented here has not been depth shifted to a PDC (Primary Depth as per BPX instruction, the MWD Gamma Ray is the PDC for this borehole. (7) A Magnetic Declination correction of 26.57 degrees has been applied to the Directional Surveys data. MNEMONICS: GR3~X -> TVD - > ROPS -> RPCHM - > RPCLM - > RACHM - > RACLM - > TCDM -> GRTI -> Natural Gamma Ray MWD-API [MAD] (MWD-API units) Subsea True Vertical Depth (SSTVD), feet Rate of Penetration, feet/hour Resistivity (PD) 2 MHz Compensated and Borehole Corrected [MAD] (Ohm-m) Resistivity (PD) 400 MHz Compensated and Borehole Corrected [MAD] (Ohra-m) Resistivity (AT) 2 MHz Compensated and Borehole Corrected [MAD](Ob_m-m) Resistivity (AT) 400 MHz Compensated and Borehole Corrected [MAD] (Ohm-m) CDS Temperature [MAD] (deg F) Gamma Ray tie run by Schlumberger RPIHM -> Resistivity Phase Difference, Data Density (pts/ft) Data density is shown by the tick marks on the right hand side of the depth track. SURFACE EQUIPMENT: Main Surface system software: MSS4 version 4.03 Memory dump system software: D-Series rev 1.03/PowerComms rev 1.0 DOWN-HOLE EQUIPMENT Natural Gamma Ray sensor: Nal Scintillation counter USMPR Resistivity: 2 MHz and 400 kHZ electromagnetic wave RWD Memory update rates: Gamma Ray 10 seconds USMPR Resistivity 5 seconds Note: Each of the resistivity measurements has an upper limit to its measurement specification. Above these values the traces can show an exaggerated response. 2 MHz Resistivity from Phase Difference 3000 Ohra-m 2 MHz Resistivity from Attenuation 500 Ohm-m 400 KHz Resistivity from Phase Difference 1000 Ohm-m 400 KHz Resistivity from Attenuation Difference 200 Ohra-m LOG ENVIROMMENTAL CORRECTIONS: Gamma Ray: Corrected for sensor type and collar size. No correction has been applied for nominal hole size, mud weight or potassium content. Resistivity: Corrected for tool size, nominal hole size and mud resistivity. Compensated readings obtained by use of dual transmitter configuration. SENSOR OFFSETS: SENSOR OFFSETS: RUN Resistivity GAPR4A DIRECTIONAL 25 23.38 ft. 16.57 ft. 36.69 ft. Tape Subfile: 1 Minimum record length: Maximum record length: 100 records... 8 bytes 132 bytes **** FILE HEADER **** MWD .001 1024 MN-EM WDFN LCC CN WN FN COUN STAT *** INFORMATION TABLE: CONS VALU ............ mwd.xtf 150 BP EXPLORATION Y-23A Prudhoe Bay Unit North Slope Alaska *** LIS COMMENT RECORD *** !!!!!!!!!!!!!!!!!!! Remark File Version 1.000 1. The data presented has is final. 2. The data has not been depth shifted to a PDC (Primary Depth Control). 3. As per BPX instructions, the MWD Gamma Ray is the PDC for this well *** INFORMATION TABLE: CIFO MNEM CHAN DIMT CNAM ODEP GR GR GRAX ROP ROP ROPS RACL RACL RACLM RACH RACH RACHM RPCH RPCH RPCHM RPCL RPCL RPCLM TCDM TCDM TCDM RPIH RPIH RPIHM GRTI GRTI GRTI RPHI RPHI RPIHM * FORMAT RECORD (TYPE# 64) Data record type is: 0 Datum Frame Size is: 44 bytes Logging direction is down (value= 255) Optical Log Depth Scale Units: Feet Frame spacing: 0.500000 Frame spacing units: [F ] Number of frames per record is: 23 One depth per frame (value= 0) Datum Specification Block Sub-type is: FRAME SPACE = 0.500 * F ONE DEPTH PER FRAME Tape depth ID: F 10 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 2 ROP MWD 68 1 3 RACL COMP 68 1 4 RACH COMP 68 1 5 RPCH COMP 68 1 6 RPCL COMP 68 1 7 TCDM COMP 68 1 8 RPIH COMP 68 1 9 GRTI COMP 68 1 10 RPHI COMP 68 1 API F/HR Total Data Records: 128 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Size Length 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 40 Tape File Start Depth = 10313.000000 Tape File End Depth = 11781.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet **** FILE TRAILER **** Tape Subfile: 2 145 records... Minimum record length: Maximum record length: 54 bytes 4124 bytes **** TAPE TRAILER **** MWD 01/12/10 168207 01 **** REEL TRAILER **** MWD 01/12/10 BHI 01 Tape Subfile: 3 Minimum record length: Maximum record length: 2 records... 132 bytes 132 bytes Tape Subfile 1 is type: LIS Tape Subfile 2 is type: LIS DEPTH GR RPCH RPCL RPHI ROP TCDM 10313.0000 -999.2500 -699.2500 -999.2500 -999.2500 -999.2500 -999.2500 10313.5000 -999.2500 -999.2500 -999.2500 -999.2500 10400.0000 -999.2500 -999.2500 -999.2500 -999.2500 10500.0000 -999.2500 -999.2500 -999.2500 -999.2500 10600.0000 -999.2500 -999.2500 -999.2500 -999.2500 10700.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 RACL RPIH -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 RACH GRTI -999.2500 -999.2500 -999.2500 47.5330 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 10800.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 10900.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 11000.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 11100.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 11200.0000 99.8750 -999.2500 22.2500 18.9050 120.8750 380.0O00 11300.0000 232.7740 83.9130 29.7540 26.1600 120.3130 972.0000 11400.0000 17.3140 114.7500 7.5490 8.0730 121.4300 1543.5000 11500.0000 26.7720 49.9290 8.4280 8.8910 123.8000 2128.0000 11600.0000 23.2050 99.6310 6.6120 7.8050 127.2870 2567.0000 11700.0000 23.2050 126.1590 6.5140 7.4990 130.8870 3035.0000 11781.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 Tape File Start Depth = 10313.000000 Tape File End Depth = 11781.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet Tape Subfile 3 is type: LIS -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 14.7430 380.0000 11.5630 972.0000 8.8120 1543.5000 9.7050 2128.0000 10.4460 2567.0000 9.4330 3035.0000 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 17.6040 -999.2500 28.1970 -999.2500 7.9640 -999.2500 8.9150 -999.2500 8.1530 -999.2500 7.7490 -999.2500 -999.2500 -999.2500 **** REEL HEADER **** MWD 01/12/12 BHI 01 LIS Customer Format Tape **** TAPE HEADER **** MWD 01/11/26 168207 01 1.75" NaviGamma - Gamma Ray *** LIS COMMENT RECORD *** Remark File Version 1.000 Extract File: glen.las ~Version Information VERS. 1.20: WRAP. NO: ~Well Information Block #MNEM.UNIT STRT. FT STOP. FT STEP. FT NULL COMP WELL FLD LOC CNTY STAT SRVC TOOL DATE API CWLS log ASCII Standard -VERSION 1.20 One line per,frame Data Type Information ..................... 11120.0000: Starting Depth 11745.0000: Ending Depth 0.5000: Level Spacing -999.2500: Absent Value COMPANY: BP EXPLORATION WELL: Y-23APB1 FIELD: Prudhoe Bay Unit LOCATION: 1372' SNL, 24' WEL COUNTY: North Slope STATE: Alaska SERVICE COMPANY: Baker Hughes INTEQ TOOL NAME & TYPE: 1.75" NaviGamma - Gamma Ray LOG DATE: 22-Jun-01 API NYUMBER: 500292159070 ~Parameter Information Block #MNEM.UNIT Value Description SECT. 33 : Section TOWN.N liN : Township RANG. 13E : Range PDAT. MSL : Permanent Datum EPD .F 0 : Elevation Of Perm. Datum LMF . DF : Log Measured from FAPD.F N/A : Feet Above Perm. Datum DMF . DF : Drilling Measured From EKB .F 88.81 : Elevation of Kelly Bushing EDF .F N/A : Elevation of Derrick Floor EGL .F N/A : Elevation of Ground Level CASE.F N/A : Casing Depth OS1 . DIRECTIONAL : Other Services Line 1 ~Remarks (1) Ail depths are Measured Depths (MD) inless otherwise noted and are tied into Schlumbergers Borehole Compensated Sonic, 17 June 1986. (2) Baker Hughes INTEQ runs 1-6 ulilized directional and gamma ray services to mill the window and drill formation from 11130 to 11745 ft MD (8773 to (3) 8908 ft TVD) in 3 3/4" hole. Gamma ray and resistivity data from 11598 to 11135 ft were logged after drilling while pumping out of the hole on coil tubing at a speed of 180 ft/hr. This section was logged from 28 to 48 hours after the formatior was initially drilled. (4) The well was inadvertantly sidetracked at 11415 ft MD on the following bit (5) The data presented here is final. (6) The data has not been depth shifted to a PDC (Primary Depth Control). as per BPX request, the MWD Gamma ray is the PDC for this borehole. (7) A Magnetic Declination correction of 26.52 has been applied to the directional surveys. MNEMONICS: GRAD( - > ROPS -> RPCHM - > RPCLM -> RACHM - > RACLM - > RPIHM -> RPTHM - > TCDM - > Natural Gamma Ray RWD-API [RWD] (RWD-API units) Rate of Penetration, feet/hour Resistivity (PD) 2 MHz Compensated and Borehole Corrected [RWD] (Ohm-m) Resistivity (PD) 400 MHz Compensated and Borehole Corrected [RWD] (Ohm-m) Resistivity (AT) 2 MHz Compensated and Borehole Corrected [RWD] (Ob_m-m) Resistivity (AT) 400 MHz Compensated and Borehole Corrected [RWD] (Ohm-m) Resistivity Phase Difference, Data Density, [RWD], Pts/ft Time Since Drilled, [RWD], minutes CDS Temperature [RWD] (deg F) Data density is shown by the tick marks on the right hand side of the depth track. SURFACE EQUIPMENT: Main Surface system software: MSS4 version 4.03 Memory dump system software: D-Series rev 1.03/PowerComms rev 1.0 DOWNHOLE EQUIPMENT Natural Gamma Ray sensor: Nal Scintillation counter USMPR Resistivity: 2 MHz and 400 kHZ electromagnetic wave RWD Memory update rates: Ga~mna Ray 10 seconds :USMPR Resistivity 5 seconds Note: Each of the resistivity measurements has an upper limit to its measurement specification. Above these values the traces can show an exaggerated response. 2 MHz Resistivity from Phase Difference 3000 Ohm-m 2 MHz Resistivity from Attenuation 500 Ohra-m 400 KHz Resistivity from Phase Difference 1000 Ohm-m 400 KHz Resistivity from Attenuation Difference 200 Otlr~-m LOG ENVIROMMENTAL CORRECTIONS: Gamma Ray: Corrected for sensor type and collar size. No correction has been applied for nominal hole size, mud weight or potassium content. Resistivity: Corrected for tool size, nominal hole size and mud resistivity. Compensated readings obtained by use of dual water based polymer mud used to drill this hole section. Rm at BHCT 0.1 SENSOR OFFSETS: RUN Resistivity GAMMA DIRECTIONAL 7 24.15 ft. 17.22 ft. 40.73 ft. Tape Subfile: 1 Minimum record length: Maximum record length: 96 records... 8 bytes 132 bytes **** FILE HEADER **** MWD .001 1024 *** INFORMATION TABLE: CONS MNEM VALU WDFN mwd.xtf LCC 150 CN BP EXPLORATION WN Y-23APB1 FN Prudhoe Bay Unit COUN North Slope STAT Alaska *** LIS COMMENT RECORD *** !!!!!!!!!!!!!!!!!!! Remark File Version 1.000 1. The data presented has is final. 2. The data has not been depth shifted to a PDC (Primary Depth Control). As per BPX instructions, the MWD Gamma ray is the PDC for this Borehole. *** INFORMATION TABLE: CIFO MNEM CHAN DIMT CNAM GR GR GRAX ROP ROP ROPS RACL RACL RACLM RACH RACH RACHM RPCH RPCH RPCHM RPCL RPCL RPCLM TCDM TCDM TCDM RPIH RPIH RPIHM RPTH RPTH RPTHM * FORMAT RECORD (TYPES 64) Data record type is: 0 Datum Frame Size is: 40 bytes Logging direction is down (value= 255) Optical Log Depth Scale Units: Feet Frame spacing: 0.500000 Frame spacing units: [F ] Number of frames per record is: 25 One depth per frame (value= 0) Datum Specification Block Sub-type is: FRAME SPACE = 0.500 * F ONE DEPTH PER FRAME Tape depth ID: F 9 Curves: Name Tool Code Samples Units 1 GR MWD 68 1 API 2 ROP MWD 68 1 F/HR ODEP ........... 00 00 O0 00 00 00 00 00 00 Size Length 4 4 4 4 3 RACL COMP 68 1 4 RACH COMP 68 1 5 RPCH COMP 68 1 6 R?CL COMP 68 1 7 TCDM COMP 68 1 8 RPIH COMP 68 1 9 RPTH COMP 68 1 4 4 4 4 4 4 4 4 4 4 4 4 4 4 ....... 36 Total Data Records: 50 Tape File Start Depth = 11131.000000 Tape File End Depth = 11745.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet **** FILE TRAILER **** Tape Subfile: 2 66 records... Minimum record length: Maximum record length: 54 bytes 4124 bytes **** TAPE TRAILER **** MWD 01/11/26 168207 01 **** REEL TRAILER **** MWD 01/12/12 BHI 01 Tape Subfile: 3 2 records... Minimum record length: 132 bytes Maximum record length: 132 bytes Tape Subfile 1 is type: LIS Tape Subfile 2 is type: LIS DEPTH GR ROP RPCH RPCL TCDM 11131.0000 -999.2500 -999.2500 -999.2500 2.1340 -999.2500 11131.5000 -999.2500 -999.2500 -999.2500 2.6660 -999.2500 11200.0000 121.7820 -999.2500 16.9800 13.5750 158.9000 11300.0000 !58.6780 -999.2500 82.5300 72.6960 158.9982 11400.0000 132.1820 -999.2500 9.9560 9.7220 162.4877 RACL RPIH 0.9600 -999.2500 0.9600 -999.2500 11.8300 298.0000 39.3580 749.0000 8.9510 1162.0000 RACH RPTH 4.8140 -999.2500 4.8140 -999.2500 14.0280 -999.2500 77.4740 -999.2500 9.8900 -999.250( 11500.0000 39.5490 -999.2500 10.6880 11.2480 11.8520 11.4820 165.8750 1615.0000 -999.2500 11600.0000 30.7630 38.9970 8.7930 8.0030 6.5770 7.3720 162.5000 2165.5000 29.0000 11700.0000 27.8190 70.5610 9.6830 9.1770 7.8330 8.4730 162.9821 2761.0000 62.0000 11745.0000 -999.2500 50.7100 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 -999.2500 Tape File Start Depth = 11131.000000 Tape File End Depth = 11745.000000 Tape File Level Spacing = 0.500000 Tape File Depth Units = feet Tape Subfile 3 is type: LIS