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Home My WebLink About194-004XHVZE Pages NOT Scanned in this Well History File This page identifies those items that were not scanned during the initial scanning project. They are available in the original file and viewable by direct inspection. I~ t/..00~/ File Number of Well History File PAGES TO DELETE Complete RESCAN [] Color items ~ Pages: Grayscale, halftones, pictures, graphs, charts- Pages: Poor Quality Original - Pages: [] Other- Pages: DIGITAL DATA [] Diskettes, No. [] Other, No/Type OVERSIZED [] Logs of various kinds [] Other COMMENTS: scanned by: Beverly~ncent Nathan Lowell ~ TO RE-SCAN Notes: Re-Scanned by: Bevedy Dianna Vincent Nathan Lowell Date: ~si 01, oR, BEF Memorandum To: Well File: Re: State of Alaska Oil and Gas Conservation Commission Cancelled or Expired Permit Action EXAMPLE: Point McIntyre P2-36AXX API# 029-22801-95 This memo will remain at the front of the subject well file. Our adopted conventions for assigning APl numbers, permit numbers and well names did not specifically address expired or cancelled permits. This omission has caused some inconsistencies in the treatment of these kinds of applications for permit to ddil. Operators have asked us to adopt formal procedures for this class of permit application in order to prevent future database disparities. If a permit expires or is cancelled by an operator, the permit number of the subject permit will remain unchanged. The APl number and in some instances the well name reflect the number of preexisting reddlls and or multilaterais in a well. In order to prevent confusing a cancelled or expired permit with an active well or multilateral these case sensitive well identifiers will be changed for expired and cancelled applications for permits to ddll. The AP! number for this cancelled or expired permit is modified so the eleven and twelfth digits is 95. The well name for a cancelled or expired permit is modified with an appended xx. These procedures are an addendum to the AP! numbering methods described in AOGCC staff memorandum "Multi-lateral (weilbore segment) Ddiling Permit Procedures, revised December 29, 1995. AOGCC database has been changed to reflect these changes to this permit. Statistical Technician ALASKA OIL AND GAS CONSERVATION COMMISSION February 1, 1994 WALTER J. HICKEL, GOVERNOR 3001 PORCUPINE DRIVE ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 TELECOPY: (907) 276-7542 Michael Zanghi Drilling Engineer Supervisor BP Exploration (Alaska), Inc. P O Box 196612 Anchorage, AK 99519-6612 Re: Sourdough #1 BP Exploration (Alaska), Inc. Permit No: 94-04 Sur. Loc. 4032'SNL, 2537'WEL, Sec. 4, T8N, R24E, UM Btmhole Loc. 3412'SNL, ll03'WEL, Sec. 4, T8N, R24E, UM Dear Mr. Zanghi: Enclosed is the approved application for permit to drill the above referenced well. The permit to drill 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. A weekly status report is required from the time the well is spudded until it is suspended or plugged and abandoned. The report should be a generalized synopsis of the week's activities and is exclusively for the Commission's internal use. Blowout prevention equipment (BOPE) must be tested in accordance with 20 AAC 25.035. Sufficient notice (approximately 24 hours) of the BOPE test performed before drilling below the surface casing shoe must be given so that a representative of the Commission may witness the test. Notice may be given by contacting the Commission petroleum field inspector on the North Slope pager at 659-3607. Chairman ~ BY ORDER OF THE COMMISSION dlf/Enclosures cc: Department of Fish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/o encl. BP EXPLORATION ARCO Alaska, Inc. A To: Robert P. Crandall Sr. Petr. Geologist Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Date: January 18,1994 Subject: Designated employee Sourdough #1 weekly status report Dear Mr. Crandall; The designated employee to fulfill the reporting requirements for BP's well Sourdough #1 will be Mr. Adrian Clark, Drilling Engineer Supervisor. Mr. Clark will phone weekly reports to you, and in your absence to Blair Wondzell. If you need to reach him his telephone # is 564-4720. Yours Sincerely, Mike%nghi ?~_~ Field Superintendent cc. M. Stanley F. Hernandez RECEIVED JAi,J i 9 !99q- Oil & 6as Cor~s. Commission Anchora.r;3 Explo;at. ion Department ~1~ EXl3~oretlon (Alaske) lnG. 900 Easl ~enson ~u~eva~ FO. Boa ~9~612 Anchorage, At~s~ 99519~612 December 30, 1993 Mr. Paul Walker Chevron U.S.A. Products Company 1301 McKinney PO Box 1635 Houston TX 77251 Subject: Application For Permit To Drill (APD) Sourdough Prospect Dear Paul: Please find enciosed a copy of our APD for the Sourdough well. This should complete our permit package under the terms of our September 20, 1993 farmout agreement. We hope .you have a nice holiday season. Very truly yours, E. P. Zse~¢zky, Jr, Land M~ager, Alaska EPZ:jld Enclosure DEC OB ~g~ O~:~SPM BP EXPLORATION ~K STATE OF ALASKA ALASKA OIL AND GA~ C0~SERVATION COMMISSION DESIGNATION OF OPERATOR 20 AAC 25.020 1. Namc and Address o£ Owner: Chevron U.S.A. Inc. P.O. Box 1635 HoUston, Texas 77251-1635 2. Nofi~ is hereby given o£ ~, dc$ign~do, or opCra,orsNp ~or the ~il andga, prop~y~&'¢rib~ b~iow: ' State of Alaska Oil and C.-,as I.~ase ADL 375064 Legal dczc~ption o£ property: Township 8 North, Range 24 Eas%, Umiak: lv~ridlan: Sections 3 (all, excluding Arctic National Wildlife Refuge (~)), 4 i(all), 5 (all), 6 (all), 7 (all), 8 (all), 9 (all, excl,~ng ~, and 10 (all, excluding ANWR) (cont~_4_~tng 4,322 acres) Prol~rty Plat Attached X~ 3, Name and Address of Designated Operator: 4, J~lIectivc dm,¢ designation: -' ~Lo Exploration (Alaska) :r_r~. 900 East Benson Blvd. P.O. Box 196612 Anchorage, AK 99519-66/2 Eecember 8, 1993 RECEIVED JAN -5 1994 Alaska Oil ~, Gas Cons. Commission Anchorage 5. Acccpmncc of opcr~t~r~hip//') for½1~vc d~i~d pro~ ~ ~1 attcn~t rc~o~ibili~ ~d obli~aotts is her~ ac~owlcdg~ /'" .:"~Q .-~,./ ~ ,-' .::; 5. ~/'..-7~ / / ~/-/ /" '- *ice ~res~t,- 6. ~e o~cr ~ice~n~ ~¢e foregoing is ~c and 6n~[ · . Approv~ ~~~~ .Dat. /- ~ '~ ~ Approved '/U6/~~~U '. , ~.~ / -- ~ -' ( ~1 (~quircs 'o signamr~) ~~ OIL ~O G~ CONSERVATION COMM~SION , Form-10-~ll ' :' ' "" ' -- ' ..... --'- -" ' ~ubmittm ...... dupli,"=l~ Rev. ALASKA OIL AND GAS CONSERVATION COMMISSION WALTER J. HICKEL, GOVERNOR 3001 PORCUPINE DRIVE ANCHORAGE, ALASKA 99501-3192 PHONE: (907) 279-1433 TELECOPY: (907) 276.7542 January 10, 1994 Mike Zanghi, Drlg Engr Supv BP Exploration (Alaska) lnc P O Box 196612 Anchorage, AK 99519-6612 Re: Exporatory well Sourdough #1 Dear Mr Zanghi: This is to review the repoding requirements (20 AAC 25.300) associated with the approval of BP's application for a permit to drill the Sourdough #1 exploratory oil well. Please designate a BP employee to generate the weekly status report. This repod is required from the time the well is spudded until it is suspended or plugged and abandoned; it should be a generalized synopsis of the week's activities. This information is exclusively for the Commission's internal use, and will be kept strictly confidential. It can be phoned or faxed to me or, in my absence, to Blair Wondzell. Following suspension or abandonment of the Sourdough #1 well, a member of your staff who is familiar with the project will be expected to coordinate the submission to the Commission of reports and materials as required by 20 AAC 25.070 and 20 AAC 25.071. If you have any questions regarding those regulations, please call me at 279-1433. Please advise me in writing of the name(s) of BP contact(s) for this well. This information is required prior to approval of your application for permit to drill. I look forward to working with you and your staff. Yours very truly, Robed P Crandall Sr Petr Geologist /jo c: well file A:~RPCexpl-rpt STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION PERMIT TO DRILL 20 AAC 25.005 la. Type of work Drill [] Redrilll-Illb. Type of well. Exploratory[] Stratigraphic Test [] Development Oil[] Re-Entry [] Deepen []1 Service [] Development Gas [] Single Zone [] Multiple Zone[] 2. Name of Operator ;5. Datum Elevation (DF or KB) 10. Field and Pool BP Exp/oration KBE = 74 feet Wi/dcat 3. Address 6. Property Designation P. O. Box 196612. Anchoraae. A/aska 99519-6612 ADL 375064 4. Location of well at surface 7. Unit or property Name 11. Type Bond(see 2o AAC 25.025) 4032' SNL, 2537' WEL, SEC. 4, T8N, R24E N/A At top of productive interval 8. Well number Number 3412' SNL, 1103' WEL, SEC. 4, T8N, R24E Sourdough #1 2S100302630-277 At total depth 9. Approximate spud date Amount 3412' SNL, 1103' WEL, SEC. 4, T8N, R24E 2/94 $200,000.00 12. Distance to nearest 13. Distance to nearest well 14. Number of acres in property15. Proposed depth (MD andTVD) property line 4032 feet No close approach feet 4322 13198' MD/12900' TVD feet 16. To be completed for deviated wells 17. Anticipated pressure (see 20 AAC 25.035 (e)(2)) Kickoff depth ~3oo feet Maximum hole angle ~,~ 0 Maximum surface 9100 psig At total depth (TVD) 10390 psl~ 118. Casing program Setting Depth s~ze Specifications Top Bottom Quantity of cement Hole Casing Weight Grade Coupling Length MD TVD MD TVD (include stage data) 30" 20" 94~ K-55 Butt 80' Surface 110' 110' 130 sx PF "C" 17-1/2" 13-3/8" 68# ~T~O~'H~ Butt 4470' 30' 30' 4540' 4500' 1370 SX "E"/700 sx Class "G" 1.,2-1/4" 9-5/8" 47# VT80-S NSCC 10270' 30' 30' 10300' loooo' 790 sx Class "G" 8-1/2" 7" 29~ NT110H$ NSCC 13168' 30' 30' 13198' 12900' 575 SX Class "G" 19. To be completed for Redrill, Re-entry, and Deepen Operations. Present well condition summary Total depth: measured feet Plugs (measured) true vertical feet Effective depth: measured feet Junk (measured) true vertical feet Casing Length Size Cemented Measured depth True Vertical depth Structural Conductor RECEIVED Surface Intermediate JAN -3 1994 Production Liner AiaS~ 0il & Gas Cons, Commission Perforation depth: measured ' ~ch0rage true vertical 20. Attachments Filing fee [] Property plat [] BOP Sketch [] Diverter Sketch [] Drilling program ITl Drilling fluid program [] Time ~s depth pict [] Refraction analysis [] Seabed report[] 20 AAC 25.050 requirements[] 21. I hereby ceFify that the fg'regoing is true and correct to the best of my knowledge Signed ~/'~'- ~/~-")L'CommissionTitleDri//ingEngineerSuperviS°ruse Only Date 17""~'!"'?'~ Permit Number ~ ~'IAPI number ,-- IApproval date See cover letter '~ ~/ ~ ~ ~ ~,;~3 ; I5 0 ' ~ ~ ~)'¢' ~ ' ~ ~ ~ '~/r I ~---/,. ~;;2~'~ for other requirements Conditions of approval Samples required ,[3~' Yes [] No Mud Icg required J~Yes [] No Hydrogen sulfide measures ~ Yes [] No Directional survey requ~reo ~ Yes [] No Required working pressure for BOPE F'I2M; 1-13M; 1-15M; []10M; []15M; Other: Origina Signed By by order of Approved by David W. Johnston Commissioner [ne commission Date"Z-/////¢ ~ Form 10-401 Rev. 12-1-85 Submit in riplicate WELL PLAN WELL: Sordough #1 LOCATION: Surface: Target: T.D.: 4032' FNL 2537' FEL Sec 04 TO8N R24E 3412' FNL 1103' FEL Sec 04 TO8N R24E 3412' FNL 1103' FEL Sec 04 TO8N R24E ESTIMATED START: OPR. DAYS TO COMPLETE: CONTRACTOR: MAX ANGLE/AZIMUTH/KOP/BUILD/MAX DEP: February 1994 82 days (70 days drill, core and Icg; 12 days testing) Pool Arctic Alaska: Rig #4 24°/66.6°/3300'/2°per100'/1560' Ground level elevation is 74' AMSL. KB to ground level elevation is 30'. EXPECTED PORE PRESSURES AND FRACTURE GRADIENTS: High overpressures have been encountered in all wells drilled in the Pt. Thomson area. At the Sourdough #1 location the following pore pressures and frac. gradients are expected to be encountered. Depth ('TVDBRT) Strata / Casing Point Pore pressure (ppg EMW) 0'- 4500' Tertiary-Upper Brookian 9.0 4500' 13-3/8" casing shoe 9.0 4500'-1 0000' Tertiary-Upper Brookian 1 0.0 1 0 0 0 0' 9-5/8" casing shoe 1 0.0 10000'-12900' Tertiary --> Cretaceous 10.0 --> 15.5 Fracture Gr~qdient (ppg EMW) 11.8-->12.5 16.0-->17.0 CASING PROGRAM: Hole Csq Wt(Ib/ft) Grade Conn 30" 20" 94 # K-55 BTC 1 7- 1/2" 13- 3/8" 68# NT-80CYHE BTC 12-1/4" 9-5/8" 47# NT-80S NSCC 8-1/2" 7" 29# NT-110HS NSCC Lenqth Top 80 30 4470 30 10270 30 13170 30 Btm ('MD) 110 4500 10300 13200 RECEIVED JAN 994 0[1 & Gas Cons. Commission Anchora.cle LOGGING PROGRAM: Open H01~- 17-1/2" Hole' E-line: AMS/DI L/SFL/GR/LSS/SP 12-1/4" Hole MWD: Gamma Ray & Resistivity E-Line: AMS/DI L/SFL/G R/LSS/SP AMS/LDT/CN L/GR/CAL Rotary Cores/GR 8-1/2" Hole: MWD: Gamma Ray, Resistivity & Density E-line: AMS/DI L/S F L/MS F L/G R/D ipole/S P AMS/LDT/CN L/GR/CAL Sidewall cores RFT VSP (Checkshot) Cased HOI~ CBL will be run if DST is to be performed RECEIVED JAN -',5 1994 ~issk~ 0ii & Gas Cons. Commission Anchorage PROPOSED DRILLING PROGRAM WELL: Sourdouah #1 -- PAA Rig #4 is currently drilling Yukon Gold #1 for BP Exploration in the area south of Pt. Thomson. Once operations are completed on this well the rig and associated equipment will be transported by trucks along an ice constructed to the Sourdough #1 location. The rig will be reassembled over the well cellar and placed on the insulated panels that were used during the successful summer-over of the insulated ice pad at Yukon Gold. The intention is to keep the rig on location during the summer period if it is desired to keep the rig in the Pt. Thomson area for another winter exploration season. Drillina Ooerations: The ice pad will be constructed and a well cellar excavated before the rig arrives on location. If timing permits, the conductor hole will be pre-drilled and the 20" conductor set and cemented before the rig's arrival. Move in, rig up. Accept rig for operations. Nipple up diverter and function test same. Drill 17-1/2" hole to casing point. Full mudlogging facilities will be on location from spud to TD. Run and cement 13-3/8", 68# casing to surface. Perform cement top-job if no cement seen at surface on primary cementation Install blowout prevention equipment consisting of 10,000 psi W.P. pipe rams, blind rams, and 5,000psi annular preventer. The initial B©PE test of 10M equipment will be conducted to l O,O00psi; subsequent tests will be conducted to maximum surface pressure anticipated in the current hole section. Maximum anticipated possible bottomhole pressure is 10,400 psi (15.5ppg EMW) at 12,900' TVDBRT. This information is based on offset well data and seismic-data interpretation. Maximum possible surface pressure is 9,100 psi based on a gas column to surface from 12900' TVDBRT. The transition from normal to abnormal pressure gradient is prognosed at approximately 9700'TVDBRT. Formation leak-off tests will be performed 10' below the 13-3/8" and 9-5/8" casing shoes. Directionally drill 12-1/4" hole to approx. 10300'MD. Hole section TD is reached when the pressure transition zone is encountered and pore pressure is estimated at 10ppgEMW. Run logs. Run 9-5/8", 47 # NSCC casing string to within 10' of 12-1/4" TD and cement with Class G cement. The annulus will be used for injection of waste fluids and freeze protected. Drill and core 8-1/2" hole to TD. Run logs. A decision to run 7" casing will be based on log information. If casing is run it will be cemented using Class G to above the 9-5/8" shoe. Log and core data will be used to determine whether any drill stem tests are performed. DSTs will be conducted with the rig on location and any fluids produc,e,d...fr_o~ ~,v~e¢ will be re-injected back into the formation or down the 9-5/8" x 13-3/8 _~n~ul9 ~hLe JAf'i --3 1994 6as Cons. Commission Anchorage conclusion of well testing operations. Fluids and cuttings incidental to the drilling of a well will be transported for injection into the Prudhoe Bay CC-2A disposal well or injected on-site down the 13-3/8" x 9-5/8" annulus once available. The well will be suspended or abandoned with the appropriate plugs and markers according to AOGCC regulations. The pad will be cleaned up of any surface debris. The nearest offest well is some four miles away, hence no close approach data is included in this package. The drilling fluid program and surface system will conform to the reguations set forth in 20AAC25.003. RECEIVED A!aska. Oil & Gas Cons. Col¥~rnission Anchorage MUD PROGRAM: Sourdough #1 MUD SPECIFICATIONS- SURFACE HOLE Surface: Casing point: Mud Weight: ppg 8.5 - 9.8 9.5 - 9.8 Funnel Viscosity sec/qt ,,-300 <100 YP lbs/100ft2 40 - 50 20 - 40 10 sec Gel lbs/100ft2 30 - 60 15 - 20 10 min Gel Ibs/100ft2 60 - 80 20 - 30 pH 9-10 9-10 APl Fluid loss mi/30 min 15-25 10-15 Solids % <8 MUD SPECIFICATIONS- INTERMEDIATE HOLE Surface casing shoe to top of transition zone: LSND Gel/Polymer System Mud Weight p p g 9.0-10.0 Yield Point Ibs/100ft2 5 - 15 Plastic Visc. 10 - 20 APl Fluid Loss mi/30 min 10 - 6 p H 9.5 Solids % <10 MUD SPECIFICATIONS-PRODUCTION INTERVAL: Mud Weight p p g 10.0 - 16.0 Yield Point lbs/100ft2 10 - 20 Plastic Viscosity 15 - 25 APl Fluid loss mi/30 min 4 - 8 p H 9.5 o I O.5 Solids % 10 - 23 Pore pressure prediction techniques and observation of hole conditions will be used to increase mud weight in line with increases in bottom hole pore pressure. Keeping a safe overbalance of +/- 200psi is planned, this equates to a mud weight approximately 0.3 ppg over pore pressure EMW at 12,700'TVD RECEIVED :.lAN -,.$ 199~ Oil & P~as Cor~s. Commission Anchorage CASING SIZE: 13-3/8" 13-3/8" SURFACE CASING CEMENT PROGRAM CIRC. TEMP 40°F SPACER: 75 bbls fresh water ahead of lead slurry. LEAD CEMENT TYPE: Permafrost Type 'E' WEIGHT: 12.0 ppg APPROX #SACKS: 1370 YIELD:2.15 ft3/sx THICKENING TIME: 5:30 hrs MIX WATER: 11.5 gps TAIL CEMENT TYPE: Premium Cass 'G' with 2% CaCI ADDITIVES: As Required WEIGHT: 15.9 ppg APPROX #SACKS: 700 YIELD:1.15 ft3/sx THICKENING TIME: 4 hrs MIX WATER: 4.9 gps TOP JOB CEMENT TYPE: Permafrost Type 'E' ADDITIVES: retarder WEIGHT: 15.6 ppg YIELD:0.95 ft3/sx APPROX #SACKS: 250 CENTRALIZER PLACEMENT: 1. Run one centralizer per joint for the first 15 joints. 2. Run two cement baskets inside the conductor pipe on stop collars. CEMENT VOLUME: 1. Lead slurry to surface w/20% excess. 2. Tail slurry to 1000' above shoe with 20% excess 3. Top job volume 250 sx. MIX WATER: 3.68 gps RECEIVED JAN ---$ 1994 Oil & 6as Cons. Commission Anchorage 9-5/8" INTERMEDIATE CASING CEMENT PROGRAM CIRC. TEMP: 140o F SPACER: 50 bbls Dual Spacer TAIL CEMENT TYPE: Class 'G' ADDITIVES: 0.2% CFR-3+ 0.2% Halad 344 + 0.2% HR-5 WEIGHT: 15.Sppg YIELD: 1.15ft3/sx APPROX #SACKS: 790 THICKENING TIME: 4.0 hrs MIX WATER: 5.0 gps CENTRALIZER PLACEMENT: 1.1 turbulator per joint on first 5 joints 2.1 turbulator on every third joint to 1000' above shoe 3.2 turbulators spaced out 100' and 200' above surface casing shoe OTHER CONSIDERATIONS: Pedorm lab tests on mixed cement/spacer/mud program and ensure compatibility prior to pumping job. Ensure thickening times are adequate relative to pumping job requirement. Displace at 10-12 bpm. CEMENT VOLUME' 1. Cement upto 2000' above shoe with 40% excess on caliper volume RECEIVED JAN -':5 1994 Oil & Gas Cons. Commission Anchorage 7" CASING CEMENT PROGRAM CIRC. TEMP 225°F SPACER' 25 bbls Dual Spacer. CEMENT TYPE: Class 'G' ADDITIVES: 0.25% CFR-3 + 0.35% Halad 344 + 0.2% HR-5 WEIGHT: 15.8 ppg YIELD:1.15 ft3/sx APPROX #SACKS: 575 THICKENING TIME: 4 hrs total MIX WATER' 5.0 gps CENTRALIZER PLACEMENT: Turbulator placement will be determined based on logs. LINER CEMENT VOLUME: 1. Open hole caliper volume+ 50% excess. 2. 500' height of cement above 9-5/8" shoe. RECEIVED JAN 1994 0il & Gas Cons. Commission Anchorage ;BP EXPLORATION BP Exploration (Alaska) Inc. 900 East Benson Boulevard RO. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 To: Jim Farnsworth - Exploration Mgr. R.L. Skillern - Land Mark Stanley- Drilling Peter Hanley- Enviromental Well File- Sourdough #1 Date: 21-Dec- 1993 From: J.A. Sauve Subj: Shallow Gas Survey for Yukon Gold Area / Sourdough #1 wellsite The Sourdough #1 well is currently planned to be drilled from a surface location, T08N, R24E, SEC 04, 4032 FNL, and 2537 FEL (Attachment I). The Sourdough #1 well will be drilled vertically to an approximate depth of 4000' TVDss (approximately 433 mSec seismic recording time) where 13 3/8" casing well be set. in accordance with Alaska State permitting requirements, the potential for shallow gas sources in the vicinity of the proposed well location, down to a vertical depth of 2000' below the surface, was reviewed. Analysis consisted of examination of seismic data near the well site (see Attachment II) and looking for the the following effects: · anomalous high or Iow amplitude seismic reflectors · velocity pull downs or time delays along individual seismic reflectors · phase-changes along otherwise continuous reflectors None of these effects were observed near the proposed location. Existing wells within the area do not show any shallow gas near the surface (< 2000 feet). The nearest offset wells are located 4 1/2 miles to the northwest (Staines River #1) and 5 1/2 miles southwest (Yukon Gold #1). No gas shows have been observed at these locations. RECEIVED ,JAN ---$ 1994 /,~2s~{a Oit & Gas Cons. Commission Anchorage s'lowness/dZ SD Sourdough t/1 Area Selsmi.,; Transit Time vs. Dep -2000 i i t i o!oo -4000 "o -6000 -8000 -10000 t II -12000 1 · CDP 750 [] CDP 800 CDP 850 CDP 900 · AVERAGE RECEIVED 'Af'i ---3 199,1. , ..... -;,.,,~ ~-,,, ~ Gas Cons. ColtrlrllJssiOrl Anchorage -14000 -16000 Transit Time (uSec/ft. ATTACHMENT I. TRAVELTIME vs. DEPTH SD de~th vs. avg slowness Sourdough #1 Area h.;erval Transit Time vs. Dep -2000 -4000 · 'o -6000 o -8000 cz. -10000 -12000 -14000 -16000 20 4[0 60 8]0 ,,. 160 120 140 160 I I 1 L , Transit Time (uSec/ft. · CDP 750 [] CDP 800 CDP 850 CDP 900 RECEIVED JAN -'~ 199~r uti & Gas Cons. Commission Anchorage ATTACHMENT II. INTERVAL TRANSIT TIME vs. DEPTH BP EXPLORATION BP Exploration (Alaska) Inc. 900 East Benson Boulevard P.O. Box 196612 Anch-..'-age, Alaska 99519-6612 (907) 561-5111 To: Jim Farnsworth - Exploration Mgr. Helmer Fucke - Chief Geoscientist R.L. Skillern- Land Mark Stanley- Drilling Peter Hanley- Enviromental Ed Travis - Exploration Engineer G.J. Pelka- geologist Well File- Sourdough #1 Date: 21-DEC, 1993 From: J.A. Sauve Subj' Geophysical Analysis for Overpressure in the Sourdough #1 area The Sourdough #1 well is currently planned to be drilled from a surface location, T08N, R24E, SEC 04, 4032 FNL, and 2537 FEL (Attachment I). Velocity analyses of CDP seismic data in the vicinity of the Sourdough #1 wc :1 location were reviewed in an effort to determine formation pressure profile in the vicinity of the site of operations. This review was in accordance to State of Alaska permitting regulation 25.033, section El. Attachment I plots seismic traveltime vs. depth based on DIX inversion of seismic CDP stacking velocities. Transit time (in',erse velocity) vs. depth for the Sourdough#1 wellsite are displayed in Attachment II. Comparison of these displays with normally pressured shales for the Sourdough area, indicate a nominal depth of 8900 'below seismic datum as the top of geopressure in the vicinity of the wellbore (equivalent to CDP 835 on seismic line BP93-33). Results are in agreement with observations of wells within the area and demonstrate moderate overpressure (negative gradient) within the target section, 9000'- 12,900' TVDss. Casing design and mud program allow for expected formation pressures. 0il & Gas CoDs. C0~f~mission Anchorage ~,HEVRt · 50.00 I EXXONi 50.00 03-27-84 ADL028383 U Th Jomso~s~ ,,. nit CHEVRON 100.0 03-31-01 ADL375064 ,.-:%C"H EVRC !"'~:~', 07 ': ADL3 N 100.00 1-92 ~3112 \ 51 ATTACHMENT~ i' Sourdough S T0P HOLE S4- TSN-R24E 4832' FNL 2537' FEL E~VED Gas Cons. 6ommissiol Anchorage 13 casing po~r ATTACHM,r:-NT il. ~EiSMIC LINE BP93-33 SOURDOUGH #1 EXPLORATION WELL CASING DIAGRAM 20" Conductor 94#, K-55, BTC 13-3/8" casing 68#, NT-80CYHE, BTC 9-5/8" casing 47#, NT-80S, NSCC ..,m 7" casing 29#, NT-110HS, NSCC 110' MDBRT 8O' BGL ca. 4,540' MDBRT ca. 4,500' TVDBRT ca. 10,300' MDBRT ca. 10,000' TVDBRT ca. 13,200' MDBRT ca. 12,900'TVDBRT ,JAN -$ 1994 0il & Gas Oons. Commission Anchorage Sourdough #1 Exploration Well Application for Permit to Drill PAA Rig #4- Available fluid storage capacity on-site. Active Mud System Twin 90 bbls trip tank- 45 bbls each Desander-degasser suction pit - 200 bbls Desilter-mudcleaner suction pit - 150 bbls Centrifuge/volume suction pit - 230 bbls Volume pit- 150 bbls Twin 280 bbls suction pit - 140 bbls each Total - 1100 bbls Other mud/water storage tanks contained in rig structure - 1 x 230 bbls tank and 1 x 170 bbls tank, both can be filled by centrifugal pump from suction pit. Additional fluid storage capacity available at rig-site: 3 x 500 bbls mud/water storage tanks positioned next to mud pits. Information on rig diverter line: PAA #4 Diverter line ID is 15". RECEIVED JAN -'5 ~994 ,,'~¢~s~.'.a (ji[& 6as oor~s, o0ramissior~ Anchorage Sourdough #1 Pore Pressure / Fracture Gradients Pore Pressure Seismic data in the vicinity of Sourdough #1 has been reviewed in conjunction with offset well records (mud logs, DST data, sonic logs and offset seismic). This analysis has provided a best estimate of the depth of the transition zone to overpressure and overpressures to be encountered. Normal pressure is expected down to around 9,700'TVDBRT. When the transition zone is drilled into and overpressure of +/- 10ppg EMW is encountered, 9-5/8" casing will be set due to limited kick tolerance considerations (dependent upon the fracture gradient encountered at the 13-3/8" casing shoe). Upon drill-out of the 9-5/8" casing, overpressure is expected to increase, until at TD of 12,900'TVDBRT a pore pressure of +/- 15.5ppg EMW is present. Fracture Gradient Information available from the Yukon Gold #1, E de K. Leffingwell #1, Alaska State C-1 and other offset wells has been reviewed to provide a best estimate of fracture gradients to be expected. 13-3/8" casing point (4,500'TVDBRT) should provide a fracture gradient of 11.8 - 12.5 ppg EMW. This will be sufficient to drill to the planned TD of the 12-1/4" hole section at 10,000'TVDBRT. Fracture Gradient at the 9-5/8" shoe will be approximately 16-17ppg EMW, sufficient to drill to the planned TD of 12,900'TVDBRT. Kick tolerance monitoring and pore pressure determination techniques Kick tolerance volume will be continually updated as the well is in progress, incorporating the most up-to-date data available from the well. The real-time resistivity log incorporated in the MWD assembly will enhance the mud logging crew's ability to monitor for change in pore pressure in addition to the normal techniques of D-Exp. projections, cuttings quality, connection gases etc. RECEIVED JA~i -"3 1994 Gas Cons. Commission Anchorage 2000 40OO 6OOO 8OOO 10000 12000 14OOO SOURDOUGH #1 Anticipated Pore Pressure, Frac Gradient Plot ppg EMW 6 8 10 12 14 16 18 a. ~ ---~'-- Pore Pressure ~ ~ -' Mud Weight ~i ' ~ t '~ ............ c ............ Fracture Gradient ' X h~t.~.~ 0~ & (i~s [ions. Co~,,,,- 105 N 848 K 6!9 N 1431 E t'~S oN OE ON 0 5~9 N 12",.O Survey Reference: WELLHEAD ' ~= Refer~ce ~rtd Coordfnates: Lut. 70.~.23 N - Long. 146.09.19~. Reference GRID Syst~l: Ataska State Pla~ Zone: A(aska 3 ~ Reference GRID Coordinates: (fi): 5876221.~N 4§0629.66 E -~ North ALigm~ To: 1RUE NORTH Vertical Section Refere~e: ~LLHE~ Ctosure Relere~e: gELLHEAD ~VD Reference: ~ELLHE~ 8PX Site C S~rdough site C Site C ~P 1 Heasured Imps{ Drift Course Depth Dim'. Length (ft) (deg,) (deg.) (ft) lie IN D.O0 0.00 0.00 0.00 ~C~ / SIARI OF BUILO @ 2.00 dog/lO0 ft Vertfcat TVD I 0 I A L DLS Secti~ Rectangutar Offsets (ft) (ft) (ft) (ft) (dg/lgOft) 0.00 0.00 0,00 N 0.00 E 0.00 0.00 3300.00 0.00 g O.OO E 0.00 1.~ 3399.98 0.69 g i.60 E 2.00 6.98 . 3499.84 2.77 N 6.&D E 2.00 15.69 3599.45 6.23 N 14.60 E 2.00 27.88 3698.70 11,07 R 25.59 E 2.00 43.52 379r.47 17.28 # 39.94 E 2.00 6~.60 3895.62 24_86N 57.45 £ 2.00 85.10 3993.t36 33.79 S 78.~0 E 2.00 110.98 4089.6~ 44.07 M 101.85 E 2.00 160.~! 4185.27 55.6~ ~ 128.68 E 2.00 172.77 4279,82 68,61 N 158.56 E 2.00 208,60 4373,17 82.84 N 191.45 E 2.00 247.67 4465.21 98.36 N 227.3~ E 2,00 251.44 4473.64 ~,85 N 230.~;~r E 2.00 3300.00 0.00 3400.00 2.00 3500,00 4,00 3600.00 6.00 3700.00 8.OD 3800.00 10.00 3900,00 12_G0 4000.00 14.00 4100.00 16.00 4200.00 lS.0O 4300.00 20.00 4600,00 22.00 4500.00 Z4.0D END OF BUILD 4509.23 24.18 51AR] OF CURVE ~ 2 7088.31 24.18 71~.31 22.18 72~B,31 20.18 7~3.31 18.18 7688.31 16.18 ~.31 14.18 76~8.31 12.18 77~S~.31 10.18 0.00 3300.00 66.6O lO0.00 ~.60 100.00 66.60 100.00 6.6.60 100.00 ~.60 100.00 6&.60 ID0.00 ~.60 lDO.DO ~,60 100.00 ~.60 100.00 66.6O 100.00 66.60 100.00 ~.60 100.00 66,60 9.23 .oo d~9/100 ft b6.60 25?9.08 130~.06 66.6D 100.00 1)47.40 66.60 100.00 1383.54 66,60 100,00 1416.40 66.60 100.00 1445,94 ~.60 100.00 14~.13 ~.60 100.00 1494.94 66.60 100.00 1514.34 6826.36 519.45 ~ 1200,47 E 0.00 6018.28 535.08 ~ 1236.60 E 2.00 7011.52 569.43 ~ 1269.7'? E 2.00 7105.96 562.48 N I299.92 E 2.00 7201.49 574.21 N 1327.04 E 2.00 7Z97.99 584.61 N 1351.08 E 2.00 7395,35 593.67 N 1372.01 E 2.00 7493.45 601.37 N 1389.81 E 2.00 Ilatliburton Drittin9 System.~ Proposa[ Report ca{cuLated u~ing the Hin{eu! Curvature Methe~ C~t~ by the HD$ gln-CADDS Syst~n Vertfca~ S~tio~m Ptane: ~.60 d~. Page 1 Date: 12/30/93 Tl~e: 4:43 ~ ~eLt~th iD: ~tta C WP 1 Lost Rev~sion: 12/30193 [13 c) o'~ .. F- GRID Coordinates C~osure Northing' East)ny Dist. Dir, (ft) (fi) (ft) (deg.) 5876222.00 480629.64 5876222.00 480629.64 5876222.69 480631.24 5876224.7~ 480636.05 5876228.19 480644.06 587623~,00 4~0655.26 587623~.18 480~69.63 5876246.71 480687.36 5876255.59 480707.8~ 5876265,81 480731.60 58762.77.35 480'~8.46 5§76290.20 4807~8.37 5§76304.~5 480~821.29 5576~{9.Tr 48~857.1~ 5876~21.26 480~860.64 5876~.64 4§1831.31 5876r53.99 ~1867.48 5876768.26 ~1900.67 5876781.2] 481930.~ 58767~92.90 481958.00 5876803.24 481982.06 5876812.25 482003.01 58768t9.91 48,2020.83 __ ._ Geograp~fc COordinates Latitude / Longitude 0,00 @ O.OO 70.04.22.7214 N 146.09,18.5~U 0.00 @ O.OO 70.~.22.7216 N 146.09,18.5~J~6 1.75 @ 66.60 70.04.22.72~2 N 146.09.18.5424 6.98 a 66.60 70.04.22.74~7 N 146,09.18.4039 W 15.69 @ 66.60 70.04.22.7827 N 146.09.18.1733 g 27.88 @ 66.60 70.04.22.8303 N 146.U9.17.8500 g 43.52 @ 66.60 70.04.22.8914 N 146.09.17.4368 U 62.60 @ 66.60 70.04.22.9659 N 146.b'9.16.9319 g 85.10 @ 66.60 70.04.23.0538 N 146.09.16.3366 g 110.98 a 66.60 70.04.23.1549 N 146.09.15.6517 ~ 140.21 a 66.6~ 70.04.23.2690 N 146.~9.14.8780 U t72.77 @ 66.60 70.04.23.3962 H 146,09.16.0164 ~ 206.60 @ (X~.60 70.06,23.5362 N 146.D9.1~.0681 ~ 247,67 a 66.60 70.06.23,6.8.88 ~ 146.09.1Z.0361 ~ 251.44 a ~.60 70.04.23.7035 X 146.09,11.9344 130&.06 g 66.60 Z0.04.27.8304 ~ 146.0H.43.9714 ~ 136Z.40 a 66.60 70.04.27.9841 { 146.08.42.9Z95 W 1383.56 g 66,,60 70.04.28.1253 N 146,00.41,9~2 ~ 1616.40 @ 66.60 70_04.28.2536 N 146.08.41.1035 1645.94 @ 66.60 70.04.28.3690 N 146.08.40.3216 1472.13 @ (:~6.60 70.04.28,4713 N 146,08.39.6~8~ 1494.94 g 66.60 70.0Z-,.28.5604 N 146.~.39.0248 U 1514.36 ~ 66.60 70.04.28.6362 N 146.08.38.5114 ~ F F 0 Hollilx~rton DrflLin9 Syst~l$ Heasured Irac[ Drift C~rse Vertical 1~ i 0 F A L DLS GRID C~rdlr~tes closure Geegral~fc C~rdi~tes D~th Dir. L~th 5~tion RectanguLar Offsets Northtng Eastin9 D~st. (ft) (deg.) (d[~.) (ft) (ft} (ft) (ft) (ft) '(d9/160 ft) (ft) (ft) (ft) (~g.) 7~.]1 8.18 ~.60 100.00 1530.]0 ~92.16 607.71 ~ 1404.46 E 2.00 587~26.~1 48Z0~5,49 15~0,]0 8 ~.60 ~,~1 6.18 ~.60 100.00 1542.80 ~691.]1 61Z.~ ~ 1415.93 E 2.00 58768~1,15 ~2046.9~ 1542,~ a 66.60 70.06,28.747~ H 146.0~.~7.~80 V 8D~,31 4.18 ~.60 1~.00 1551.~ ~90.96 616.26 N t42~,23 E 2.00 5B~68~.72 48~055.2~ 1551,~ ~ 66.60 70.0~,28.7826 H 146.0B.3~.5189 8168.31 2.18 ~.~ iOD,OO 1557.39 ~90.80 618.47 N 1429.33 E 2,00 567~.92 182060.38 1557.39 g 66.60 62~.31 O. 18 66.~ 100,00 1559.46 7990.~ 619.29 N 1431.22 E Z.O0 567~37,~ 48206Z.2~ 1559.46 g 66.~ 70,0~.28.8124 [ARGET 8297.5~ 0.~ O.DO 9.2~ 1559.48 ~00.00 619.30 ~ 1431.24 E 2.00 56'/6~.7~ 462062.30 1559,48 g 66.~ 7D,0~.28.~125 N 146.06,3T.3167 V TOTAL DEPIK 13197.54 0.00 0.00 4900.00 1559,48 12900.00 6~9,30 ~ i~31.24 E 0.00 5&7~37.74 ~62062.30 1559.48 g 66.60 70.0G.28.8125 Page 2 Date: 12/30/93 I~elIpath ID: $~te C t4P 1 PI BP EXPLORATION BP Exploration (Alaska) Inc. 900 East Benson Boulevard P.O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 January 11th 1994 Mr R. Crandall AC)GCC 3001 Porcupine Drive, Anchorage, AK 99501 Ref.' Sourdough #1 Exploration Well Dear Sir, Below are listed the BP Exploration contacts for the Sourdough #1 well. All information required to be forwarded to AOGCC under AAC Regulations shall be submitted at the conclusion of operations. Drilling Qperations: Primary contact: Mark Stanley Senior Drilling Engineer Tel: 564-5938 Alternate contact: Floyd Hernandez Senior Drilling Engineer Tel' 564-5960 Geological contact: Buster Bryant Senior Operations Co-ordinator Tel' 564-4752 (will co-ordinate submission of all data at completion of operations) Sincerely Mark SI~ BP Exploration (AT~ska ) Inc F' :i: L.. [::: :: .'.-':::-: :(:) i .... Fi E)!...!'.'..:ii; "i" (3 i'..i 'T' X 7 :'? ii'iil ~.:.:i ii. C,':~':'~ ~i!i:i !E 'T' .... 'V" F::' E ',', Ci iii i .... %: ~".'.~ f"..'~ !ii~ L.. ............................... ~:::. ~'...~ :::::, ~:::. ,......',...~.;.?~ .... l{i)f::',."i"E iil !',.i ................................ 111 "~" iil ¢'::", 'T' !i!{: 'I":". :', :'";'::';' ..... ]. '7 .... :i. 9':'i;'C' ::::::::::::::::::::: ':::" "r' """ ~r' ""-.., .......... ~':::' : ~'..-C T iil ...... 'vi:::. 'T'C)"i"~':-':~l ....~...; .......... ~...,r',."'c':E:, .... :: ":'.i. ~, :/!ii:E!:;:///: ,, C'O.':) S~:::i....Ei ¢:~F;;E:..-":'-~ !',{ E) F;: 'T' H F' ]; L.. E: i.... E)C ~'."::~'T' ;i; E! i'",I :: 9 ]; :,,." C! ;[ i .... ~':'::'~ N 9 (.":'~ f:'~ S ....... i:::, ~:::' ,::::. I:::,,'"; h,i :i!i~ .[ ., ...... ;[ 'T' '¢' ~ D )[ ':v" ""'" '~' * .,':::, r::~ i":: ~.:.-:; f*~, ~::::; ....,!'"* ,!:" r- ];,..,""' ,*:::' .... ,.,r'; F:' :l:::' I:::., .. ]; ~',,, .:.c:., i::~: Y , ................... '" i'})'~'l ........... ~. o. .'. ..:. .: .... :i. .."".i :r"'i ! r"; F~: !: -: L..- -~' 'i C:- %: i"~,. "..J ~ "4 i..,.i F::' ]: i....iiii: ',: ,"-'::i D!... CHECK LIST FOR NEW WELL PERMITS ** ITEM APPROVE DATE , ¢2) [2 thru ~~ (3) Admin (4) Casg 1, 2. 3. 4. 5. 6. qPP 8. [10 & 13 12. 13. ,/,/*¢ ¢14 thru 2:~]' 15. [23 thru 2~8]~ [29 t h r'U-~:[ Y' (7) Contact (8) Addl [32] 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. Company Z~:)/° / YES Is permit fee attached ............................................... Is well to be located in a defined pool .............................. Is well located proper distance from property 1 ine ................... Is well located proper distance from other wells ..................... Is sufficient undedicated acreage available in this pool ............. Is well to be deviated & is wellbore plat included ................... ..~ Is operator the only affected party .................................. ~_~_ Can permit be approved before 15-day wait ............................ Does operator have a bond in force ................................... X is a conservation order needed ....................................... ./~ I s admi n i st rat i ve approval needed .................................... Is lease nt~nber appropriate .......................................... Does well have a unique name & number ................................ Is conductor string provided ......................................... Will surface casing protect all zones reasonably expected to serve as an underground source of drinking water .................. Is enough cement used to circulate on conductor & surface ............ Will cement tie in surface & intermediate or production strings ...... Will cement cover all known productive horizons ..................... Will all casing give adequate safety in collapse, tension, and burst. Is well to be kicked off from an existing wellbore ................... Is old wellbore abandonment procedure included on 10-403 ............. Is adequate wellbore separation proposed ............................. Is a d iverter system required ........................................ Is drilling fluid program schematic & list of equipment adequate ..... Are necessary diagrams & descriptions of diverter & BOPE attached .... Does BOPE have suffic lent pressure rating -- test to /~.,~) ps ig ..... Does choke manifold comply w/API RP-53 (May 84) ...................... Is presence of H2S gas .probable ...................................... FOR EXPLORATORY & STRATI GRAPH IC WELLS' Are data presented on potential overpressure zones ................... Are seismic analysis data presented on shal low gas zones ............. If offshore loc, are survey results of seabed conditions presented... Name and phone nuDber of contact to supply weekly progress data ...... Add i t i onal requ i rements ............................................. Lease & Well ~_~ REMARKS / ,. , O -rz ~O --I Orll rll Z geology' DWJ~ TAB rev 6/93 jo/6.011 eng i neer i ng: BE JD m _ INITIAL GEO'L j UNIT'' ON/OFF POOL CLASS STATUS AREAJ , ~ SHORE ,4, o , , Additional remarks' MERIDIAN' UN ~ SN WELL TYPE' (~/Dev ~' Inj . Red r i 11 Rev