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+ • STATE OF ALASKA • ALASKA OIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LOG 1a. Well Status: Oil ❑ Gas ❑ SPLUG ❑ Other ❑ Abandoned Suspended ❑ 20AAC 25.105 20AAC 25.110 GINJ ❑ WINJ ❑ WAGE] WDSPL ❑ No. of Completions: 1 b. Well Class: Development ❑ Exploratory Service ❑ Stratigraphic Test ❑� ❑ 2. Operator Name: Bureau of Land Management 6. Dat p., Susp., or CAbaee3/2/2018 14. Permit to Drill Number / Sundry: 100-1 16,p" 3. Address: 222 W. 7th Ave., #13, Anchorage, AK 99513 7. Date Spudded: 1/26/1952 15. API Number: 50-119-10007-00-00 4a. Location of Well (Governmental Section): Surface: 4,287' FWL, 4,104' FNL,T2N, R6W, S2SE, Umiat /I%Z> ,' 3 • Lat: 69.5530648998, Long: -153.27185340 Top of Productive Interval: s Lat: 69.5530648998, Long: -153.271853400 Total Depth: IVI''4 7�"' e3 L Lat: 69.5530648998, Long: -153.271853400 8. Date TD Reached: 4/18/1952 b -Z,0 16. Well Name and Number: 6 Square Lake #1 9. Ref Elevations: KB: �r1 GL 32., BF: `M1' 17. Field / Pool(s): NPR -Alaska 10. Plug Back Depth MD/TVD: Surface 18. Property Designation: 4b. Location of Well (State Base Plane Coordinate NAD 27).') Surface: x- 592,276.39 y- 5,686,608.03 Zone- 5 TPI: x- 592,276.39 y- 5,686,608.03 Zone- 5 Total Depth: x- 592,276.39 y- 5,686,608.03 Zone- 5 11. Total Depth MD/TVD: 3,987' • 19. DNR Approval Number: N/A 12. SSSV Depth MD/TVD: N/A 20. Thickness of Permafrost MD/TVD 5. Directional or Inclination Survey: Yes L (attached) No - Submit electronic and printed information per 20 AAC 25.050 13. Water Depth, if Offshore: N/A (ft MSL) 21. Re-drill/Lateral Top Window MD/TVD: N/A 22. Logs Obtained: List all logs run and, pursuant to AS 31.05.030 and 20 AAC 25.071, submit all electronic data and printed logs within 90 days of completion, suspension, or abandonment, whichever occurs first. Types of logs to be listed include, but are not limited to: mud log, spontaneous potential, gamma ray, caliper, resistivity, porosity, magnetic resonance, dipmeter, formation tester, temperature, cement evaluation, casing collar locator, jewelry, perforation record. Acronyms may be used. Attach a separate page if necessary RECEIVELi N/A SCA"ALIM J U L' V 2 Z U) 4 JUN 19 2018 23. CASING, LINER AND CEMENTING RECORD and WT. PER GRADE SETTING DEPTH MD HOLE SIZE CEMENTING RECORD SETTING DEPTH TVD AMOUNT CASING FT TOP BOTTOM TOP BOTTOM PULLED 13-3/8" 54.5 J-55 0 110' 0 110' 17-1/2" Cond. cemented to surface 120 sx 10-3/4" 55.5 N-80 0 728' 0 728' 12-1/4" IA cemented to surface 160 sx 24. Open to production or injection? Yes ❑ No Q If Yes, list each interval open (MD/TVD of Top and Bottom; Perforation Size and Number; Date Perfd): 25. TUBING RECORD SIZE DEPTH SET (MD) PACKER SET (MD/TVD) 26. ACID, FRACTURE, CEMENT SQUEEZE, ETC. Was hydraulic fracturing used during completion? Yes ❑ No Per 20 AAC 25.283 (i)(2) attach electronic and printed information Q . DEPTH INTERVAL (MD) AMOUNT AND KIND OF MATERIAL USED 0'-129' MD 12 bbls 15.6 ppg Class G Arctic in 10-3/4" csg. 27. PRODUCTION TEST Date First Production: N/A Method of Operation (Flowing, gas lift, etc.): N/A Date of Test: N/A Hours Tested: N/A Production for Test Period Oil -Bbl: N/A Gas -MCF: N/A Water -Bbl: N/A Choke Size: N/A Gas -Oil Ratio I N/A Flow Tubing Press. Casinq Press: N/A Calculated 24 -Hour Rate Oil -Bbl: N/A Gas -MCF: N/A Water -Bbl: N/A Oil Gravity - API (torr): N/A Form 10-407 Revised 5/2017 CONTINUED ON PAGE 2 Submit ORIGIN A7on ,0*� 0.� , 18 RBDMS,l JUN 2 0 lug � % ` Ah Ah 28. CORE DATA Conventions ore(s): Yes ❑ No 0 Sidewall Cor Yes ❑ No If Yes, list formations and intervals cored (MD/TVD, From/To), and summarize lithology and presence of oil, gas or water (submit separate pages with this orm, if needed). Submit detailed descriptions, core chips, photographs, and all subsequent laboratory analytical results per 20 AAC 25.071. 29. GEOLOGIC MARKERSTS List all formations and markers encountered): ( ) 30. FORMATION TE S NAME MD TVD Well tested? Yes ❑ No ❑✓ If yes, list intervals and formations tested, briefly summarizing test resul S. Permafrost - Top Permafrost - Base Attach separate pages to this form, if needed, and submit detailed test Top of Productive Interval information, including reports, per 20 AAC 25.071. Formation at total depth: 31. List of Attachments: 3160-5; Olgoonik Construction Services operations summary; photographic report; wellbore schematic; daily reports. Information to be attached includes, but is not limited to: summary of daily operations, wellbore schematic, directional or inclination survey, core analysis, paleontological report, production or well test results, per 20 AAC 25.070. 32. 1 hereby certify that the foregoing is true and correct to the best of my knowledge. Authorized Name: Wayne Svejnoha Contact Name: Jessie Chmielowski Authorized Title: Branch ChAf,_fAep6X9Ad Minerals Contact Email: jchmielowski@blm.gov Authorized Contact Phone: 907-271-4190 Signature: Date: &/7// INSTRUCTIONS General: Thi fo and the required attachments provide a complete and concise record for each well drilled in Alaska. Submit a well schematic diagram with each 10-407 well completion report and 10-404 well sundry report when the downhole well design is changed. All laboratory analytical reports regarding samples or tests from a well must be submitted to the AOGCC, no matter when the analyses are conducted. Item 1a: 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 1b: Well Class - Service wells: Gas Injection, Water Injection, Water -Alternating -Gas Injection, Salt Water Disposal, Water Supply for Injection, Observation, or Other. Item 4b: TPI (Top of Producing Interval). Item 9: The Kelly Bushing, Ground Level, and Base Flange elevations in feet above Mean Sea Level Use same as reference for depth measurements given in other spaces on this form and in any attachments. Item 15: The API number reported to AOGCC must be 14 digits (ex: 50-029-20123-00-00). Item 19: Report the Division of Oil & Gas / Division of Mining Land and Water: Plan of Operations (LO/Region YY -123), Land Use Permit (LAS 123416) and/or Easement (ADL 123456) number. Item 20: Report measured depth and true vertical thickness of permafrost. Provide MD and TVD for the top and base of permafrost in Box 29. Item 22: Review the reporting requirements of 20 AAC 25.071 and, pursuant to AS 31.05.030, submit all electronic data and printed logs within 90 d ays of completion, suspension, or abandonment, whichever occurs first. Item 23: Attached supplemental records should show the details of any multiple stage cementing and the location of the cementing tool. Item 24: If this well is completed for separate production from more than one interval (multiple completion), so state in item 1, and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). Item 27: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-in, or Other (explain). Item 28: Provide a listing of intervals cored and the corresponding formations, and a brief description in this box. Pursuant to 20 AAC 25.071, submit detailed descriptions, core chips, photographs, and all subsequent laboratory analytical results, including, but not limited to: porosity, permeability, fluid saturation, fluid composition, fluid fluorescence, vitrinite reflectance, geochemical, or paleontology. Item 30: Provide a listing of intervals tested and the corresponding formation, and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Item 31: Pursuant to 20 AAC 25.070, attach to this form: well schematic diagram, summary of daily well operations, directional or inclination survey, �nd other tests as required including, but not limited to: core analysis, paleontological report, production or well test results. Form 10-407 Revised 5/2017 Submit ORIGIN L Only Ol++�on i k - �� Corporation Olgoonik Construction Services, LLC. 3201 'C' Street, Suite #700 Anchorage, Alaska 99503 April 24th, 2018 Bureau of Land Management (BLM) 222 West 7th Ave. #13 Anchorage, Alaska 99513 RE: Sundry Notice (Permanent Abandonment) Well: Square Lake Test Well #1 TRS: 4,287' FWL, 4,104' FNL, T2N, R6W, Section 2, UM Dear Ms. Eagle, Olgoonik Construction Services, LLC. hereby gives Final Abandonment Notice for a Sundry Approval to Permanently Abandon the SL #1 Exploration Well. All work has been completed per the approved conditions of approval as of 3/02/2018. Pertinent information attached to this application includes the following: 1) Form 3160-5 Sundry Application 2) Executive Operations Summary 3) Photographic Report 4) Wellbore Schematic 5) Detailed Daily Operations Reports The following is the OCS designated contact for reporting responsibilities to the BLM: James Nunley General Manager (907) 232-9952 If you have any questions or require further information, please don't hesitate to contact me. Sincerely, Zach Sayers Engineering Manager • • FORM APPROVED UNITED STATES Form 3160.5 OMB No 1004-0137 (lune 2015) DEPARTMENT OF THE INTERIOR Expins: January 31, 2018 BUREAU OF LAND MANAGEMENT S. Lease Serial No. NIA SUNDRY NOTICES AND REPORTS ON WELLS 6 Iflndian,AlloaccorTribe Name Do not use this form for proposals to drill or to re-enter an NIA abandoned well. Use Form 3160-3APD for such proposals. SUBMIT IN TRIPLICATE - Other instructions on page 2 7. If Unit of CA Agreement, Name and/or No. 1. Type: of Weil N/A 8,11e11 Name and No Oil well❑Gas well Other Square Lake Test Well #1 2. Name of Operator 9 API Well No Bureau of Land Management 50-119-10007-00-00 3a. Address 222 W 7th Ave, #13 Anchorage, AK 99513 3b. Phone No. (include area conte) 10. Field and Pool or Exploratory Area (907) 271-4354 Wolf Creek, NPR -Alaska 4. Location of Well (Footage Sec, T.R .AI , orSuri-es Description) 11. Country or Parish, State 4,287 FWL, 4.104' FNL, T2N, R6W, S2, Umiat / Let: 69.5530648998, Long -153.271853400 North Slope Borough, AK 12. Cl{ECK THE APPROPRIATE BOX(ES) TO INDICATE NATURE OF NOTICE, REPORT OR 0-111 Ell DATA TYPE OFSUBMISSION i TYPE OF ACTION Notice of Intent ❑ Acidic - ❑ Dccpcn ❑ Production (Start/Resume) ❑ Nater Shut-OfT ❑ Alter Casing ❑ Hydraulic Fracturing ❑ Reclamation ❑ Well Integrity © Subscxpuent Report ❑ Casing Repair ❑ New Construction ❑ Recomplete ❑ Other ❑ Change Plans © Plug and Abandon ❑'Fe mp orarily Abandon Final Abandonment Notice ❑ Convert to Injection ❑ Plug Back \Vater Disposal 13. Describe Proposed or Completed Operation; Clearly state all pertinent details, including estimated starting date ofany proposed work and approximate duration them -or If the proposal is to deepen directionally or recomplete horizontally, give subsurface locations and measured and true vertical depths ofall pertinent markers and zonas. Attach the Bond under which the wntk will be performed or provide the Bond No on file with BLM/BIA Required subsequent reports must be filed within 30 dads following completion of the involved operations If the operation results in a multiple completion or mcompiction in a new interval, a Form 31604 must be filed once testing has been completed Final Abandonment Notices must be filed only after all requirements, including reclamation, have been completed and the operator has determined that the site is ready for final inspection) Notice of Final Completion of Well Abandonment and Surface Remediation Activities: Plugging Operations began 2/27/2018 and were completed 310212018. Please see attached reports for in depth details The IA was plugged with a cement plug to surface and tested to 500 psi compressive strength. The IA was cemented from 113' to surface (GL measurement). The existing casing at surface was cut off during the BOP rig up. A marker plats was welded on 5' below ground level, 37 cu yards of soil was removed from SL #1 around the wellhead and cellar and 40 cu yards of fresh clean fill were replaced 14.1 hereby certify that the foregoing is true and comet Name (Printed %pcd) Zach Sayers TitleEngineering Manager Signature c1. 1 Date 04/24/2018 S ACE FOR FEDERAL OR STATE OFICE USE A v by , Branch Chle f, Energy and Minerals / Title TD. Condi tio f ppra val, if any, are ch Approval of this notice does not warrant or certify, tt d applicant holds le • or eq Citable title to those rights in the subject lease Office which w ntitle the applicant to ct operations thereon Title 18 U.S.0 Section 1001 and Title 43 U.S.0 Section 1212, make it a crime for any person knowingly and willfully to make to any departmetit or agency of the United States any false, fictitious or fraudulent statements or representations as to any matter within its jurisdiction (Instructions on page 2) From: Zach Sayers Date: April 24th, 20.Wa RE: Square Lake Test Well #1 Executive Summary ! Well Background Square Lake Test Well #1 was drilled by the U.S. Navy in 1952. This well was drilled to a TD of 3,987' MD with the 10-3/4" casing string having been set at 728' MD. Gas was found between 1,640 and 1,675 feet. Four cement plugs were set with the top most plug at 728' MD. From the research it appears that the water based drilling mud was left in the hole and left to freeze in the wellbore. It is also noted that the mud was bailed down prior to leaving the well to a depth of 225'. It is assumed that the wellbore has since filled with fresh water. The USGS reports note that thermistor cables were placed in the wellbore prior to leaving the well at 200' and 540'. Operations Summary: OCS began the rig up on location on 02/27/2018. A snow pad was built to level the wellsite and provide a working area for the well equipment. A cellar was dug using the excavator and a frost bucket. All well equipment was spotted into place to include a cement unit, steam boiler, fresh water car, tool conex, hose conex, pit, and the Boart Longyear LX10 rig. The existing casing stump was cut below ground level, dressed and a starting flange was welded on to allow safety control and closed loop fluid containment for the plugging operations. The thermistor cable that was hanging in the well was observed to be severed at the ice level and could not be recovered nor pulled in tension for the operations. Blow Out Prevention Equipment (BOPE) was rigged up, then the rig was skid over the well center. A riser and flow pan were lowered through the rig floor and nippled up onto the wellhead. A BOP function test was performed prior to commencing operations. Thawing operations inside of the IA began on 2/28/2018 and continued to a depth of 113' below ground level. On 3/01/2018 cement was pumped from 113' to surface inside the 10-3/4" IA. The workstring was pulled out of hole and laid down. The remaining wellhead and stub of 10-3/4" casing were cut off and capped with an API marker plate 5' below ground level. The surface equipment was rigged down and removed from location. The well cellar area was back filled with fresh fill and all surface debris was cleaned from location. Operations were completed on 3/02/2018. Sincerely Zach Sayer Engineering Manage t)Igoonik _"W*%W Construction Well Photo Report Services LLC Well Name & Number: Square Lake Test Well #1 API Well Number: 50-119-10007-00-00 Field: Wolf Creek Exploration Area t, Well marker p 3/02/2018 Surface photo after abandonment activities 3/02/2018 Location of Well 7 Government Section: 4,287' FWL, 4,104' FNL, T2N, R6W, S2, Umiat Meridian State Plane Coordinates: X: 592,276.39 Y: 5,686,608.03 Zone 5 (NAD27) Latitude/Longitude: 69°33'11.0336"N / 153°1654.6722"W 16' M- --D/TVD-riCOginal_Ground- LeveD -- -- ----- Cardinal No. 2 Rotary Rig Spud: January 26th, 1952 Completed: Aprill8th, 1952 5' Below Ground Level -13-3/8" Marking Plate welded on with 1/8" weep hole ------------------------------------------- 129' MD —Ground Level --- P&A Cement Plus 2 thermistor cables* r' Cement circulated up IA *assumed 2 from historic notes. (200 &540') 12 bbls total cement pumped (returns taken to surface) 75 sx Class 'G' Artic Grade cmt 0.930 ft3/sk yield, 15.6 ppg 17-1/2" OH to 130' MD/TVD Frozen drilling fluid / water left in wellbore below cement plug 12.1 ppg WBM left in hole Expected to be a Auqagel & Baroid based system 12-1/4" OH f/ 130' MD t/ 728' MD/TVD \.CIIICIIL r1UR'-'4/.LO/17J4 Cement spotted from 700'— 741' MD /TVD (41') 12-1/4" OH most likelv collapsed (drawn as o <.CIIICM rlUM - -t/ ZO/ 17.74 Cement spotted from 1,640 —1,840' MD /TVD (200') %.CIIICIII r1Ur, - Y/ 10/ 4774 Cement spotted from 1,865 —1,934' MD /TVD (69') \.CIMUIL r1UK - H/ 10/ 1774 Cement spotted from 2,745 — 2,935' MD /TVD (190') 80 sx High Early cmt " OH f/ 728' MD 7-1/2" OH f/ 3,978' MD 978'M 987' M D/TV D CONDUCTOR 13-3/8", 54.5#, J-55 SMLS CSG to 110' MD/TVD (12.615" ID, 12.459" Drift, 2,730 Burst, 1,130 Collapse) 4 jts range 2 Cemented with 85 sx of Cal -Seal Expected TOC at surface * thaw bulb forced secondary top job: 35 sks Cal -Seal & 10 sks High Early cmt SURFACE CASING 10-3/4", 55.5#, Hydril Stream Lined CSG to 728' MD/TVD (9.76" ID, 9.604" Drift, 6,450 Burst, 4,020 Collapse) Cemented with 160 sx of High Early cmt Expected TOC surface Square Lake Test Well #1 As Plugged Schematic TD: 3,987'MD/TVD Wolf Creek Exploration Area Olgoonik"%W PBTD: Surface NPRA, Alaska Drawn By: Construction Date API # 50-119-10007 PTD # 100-1160 - Services LLC 4/23/2018 Elevation KB: 340' RKB — GL: 16' SL #1 DOR Daily Operations Report Well Name: Square Lake Test Well #1 Operator: BUM Report #: 1 Well Type: Oil & Gas Exploration Well API #: 50-119-10007-00-00 Report Date: 27 -Feb -18 Field: NPR -Alaska PTD #: 100-1160 Contract #: L15PC00005 Contacts Weather Supervisor: Shane Phone #: (801)556-0946 Gen. Conditions: Blowing snow McGeehan Site Manager: Phone #: 907-232-9952 Phase: James Nunley Proj Eng: Zach Sayers Phone #: 281-615-1408 Wind Direction: West BUM PI: Phone #: Wind Gusts (mph): 10-20 MPH 1-5 Temp. (Low, High): -10 Well Status TD: 3,987 GL, ft: 340' Planned Days: 4 PBTD: 728 RKB,ft: 16' Start Date: 27 -Feb -18 Fluid in Well: Water Base Mud OH ID, In: 95/8'. Operation Days: 1 Last BOP Test: 2/27/2018 Last Safety Mtg: Last Evac Drill: 2/27/2018 CSO String OD (in) Depth (ft) Weight (#/ft) Integrity Issues Outer Most: Conductor: 133/8 110 54.5 2 thermistor cables Surface: 103/4 728 55.5 Production: Pump Parameters Pump # Type Model Rate (BPM) Pressure (psi) Triplex Mud Pump Wil - - Mud / Brine Properties Fluid Type Weight (ppg) Volume (bbls.) Clear NaCl Brine 9.5+ ""' .. .. • .:, Cumulative Volume (bbls): 0 Waste Fluids Fluid Type Weight (ppg) Daily Volume (bli Cumulative Volume (bbls): 0 Operations Report 24 Hour Move equipment to Square Lake Test Well #1. Test Well Control Devise. Summary: 24 Hour Thaw Wellbore, Prepare for cement job. Forecast: HSE Summary: No Accidents, No Incidents, No Spills. From To Hours Operational Details .(6:00-6:00) Rig Up: Re-inforce Rig Floors, Build Cellar Enclosure 6:30 11:45 5:15 SIMOPS: Get heater to Boiler and begin start up procedure. SIMOPS: Spot 2nd tank, MU hardline from flow cross to 2nd Tank, RU manifold. Break for lunch Begin Taking on fresh water (8 bbls), Begin making brine, RU Air Compressor, Blow down choke with air: line clear 11:45 12:30 0:45 12:30 14:00 1:30 14:00 15:00 1 1:00 Troubleshoot 2 burner heat (burners not firing). RD Heater & RU cement units 4 burner heater to cellar and rig. Continue making Brine 15:00 15:30 0:30 SIMOPS: Transfer DP to rig and Strap Troubleshoot 40 HP Boiler Unit. ( Not gaining pressure). SIMOPS: Continue mixing Brine. Final weight 9.4+ ppg. Will agitate more tomorrow and add salt as necessary. 15:30 18:00 2:30 SIMOPS: Prepare secondary boiler for use. Main boiler fixed, heat brine to 130° F. RU for BOP test, RIH with test joint and test donut. RU test pump and lines. 18:00 18:30 0:30 Begin Well Control Devise test. Close lower pipe ram on 1-1/4" test joint. 25 turns to close. Pressure up to 1,000 psi (200 psi min planned). Hold for 5 minutes and inspect for leaks. 18:30 19:00 0:30 No leaks. Relief Pressure, Open Rams. Test witnessed by BUM Representative: Amanda Eagle 19:00 19:30 0:30 RU submersible feed pump in flow pit to rig Triplex. Fill hole with brine. Close lower rams on 1-1/4" testjoint. Secure Well for evening. 19:30 20:00 0:30 Walkout all lines to clear fluids. Total Hours: 13:30 Remarks: SL #1 DOR Daily Operations Report OR Well Name: Square lake Test Well #1 Operator: BLM Report #: 2 Oil & Gas Exploration Well API #: SO -119-10007-00-00 Report Date: 28-1`eb-18 Well Type: Field: NPR -Alaska PTD M 100-1160 Contract #, L16PC00005 Contacts Weather Shane Supervisor: Phone #: (801) 556-0946 Gen. Conditions: Calm, Ice Fog McGeehan Site Manager: Phone #: 907-232-9952 Phase: - James Nunley Zach Sayers Phone M Proj Eng: 281-615-1408 1WInd Direction: West BLM PI: Amanda Eagle Phone M Wind Gusts (mph): ]Temp. 5-10 MPH (Low, High): -20 -5 Well Status TD: 3,987 GL, ft: 340' I Planned Days: 4 PBTD: 728 RKB, ft: 16' IStart Date: 27 -Feb -18 Fluid in Well: Water Base Mud OH ID, in: 95/8- 10peration Days: 2 Last BOP Test: 2/27/2018 Last Safety Mtg: 2/28/2018 1 Last Evac Drill: 2/28/2018 Csg String OD (in) Depth (ft) Weight (#/ft) Integrity Issues Outer Most: Conductor: 133/8 110 54.5 2 thermistor cables Surface: 103/4 728 55.5 Production: Pump Parameters Pump # Type Model Rate (BPM) Pressure (psi) Triplex Mud Pump Wll 1.0 0-50 psi Mud / Brine Properties Fluid Type Weight (ppg) Volume (bbls.) Clear NaCl Brine 9.5+ Cumulative Volume (bbls): 0 Waste Fluids Fluid Type Weight (ppg) Daily Volume (bbls.) Cumulative Volume (bbls): 0 Operations Report 24 Hour Thaw Wellbore, Prepare for cement job. Summary: 24 Hour Cement Wellbore, RDMO Forecast: HSE Summary: No Accidents, No Incidents, No Spills. From To Hours Operational Details (6:00 - 6:00) 7:00 8:00 1:00 Start Rig, Fire Boiler, Begin Heating brine tank. Reset burner on heater. 8:00 9:00 1:00 MU pipe handling equipment. Prepare Joint #1 with mule shoe. 9:00 9:11 0:11 PU Joint #1, RIH, BOP Drill - lmin 33sec. RIH with Jt # 2 while circulating hot brine. (22.43'-33.06') 1.0 bpm, 0-50 psi, 115°F In - 90°F Out 9:11 9:33 0:22 No obstructions seen below the well as where possible cement noted. * All Depths listed reference original well RKB (16' above Ground Level) RIH with It # 3 while circulating hot brine. (33.06'-43.76') 9:33 9:55 0:22 1.0 bpm, 0-50 psi, 110°F In - 88°F Out 9:55 10:10 0:15 PU Joint #4, galled thread. LD RIH with It # 5 while circulating hot brine. (43.76'-54.46') 10:10 10:35 0:25 1.0 bpm, 0-50 psi, 80°F In - 70°F Out. SIMOPS: Troubleshoot boiler. Repair. RIH with Jt # 6 while circulating hot brine. (54.46'-65.03') 10:36 10:53 0:18 1.0 bpm, 0-50 psi, 907in - 76°F Out. RIH with Jt # 7 while circulating hot brine. (65.03'-75.60') 10:53 11:14 0:21 1.0 bpm, 0-50 psi, 115°F In - 82°F Out. RIH with Jt # 8 while circulating hot brine. (75.60'-86.16') 11:14 11:36 0:22 1.0 bpm, 0-50 psi, 90°F In -76°F Out. RIH with Jt # 9 while circulating hot brine. (86.16'-96.88') 11:36 12:07 0:31 1.0 bpm, 0-50 psi, 115°F In - 75°F Out. RIH with Jt# 10 while circulating hot brine. (96.88'-107.61') 12:07 12:22 0:15 1.0 bpm, 0-50 psi, 111°F In - 67°F Out. RIH with Jt # 11 while circulating hot brine. (107.61'-118.36') 12:22 12:42 0:20 1.0 bpm, 0-50 psi, 98°F In - 70°F Out. RIH with It #12 while circulating hot brine. (118.36'-129.09') 12:42 1:00 PM 0:18 1.0 bpm, 0-50 psi, 90°F In - 69°F Out. No issues noted while RIH due to Thermistor cables. Transfer Burner from Cellar / Rig and over to the cement unit. Begin Heating Cement Unit. 13:00 15:00 2:00 SIMOPS: Prepare well for over night shut -down: Weight up brine system from 8.8 PPG to 9.5+ PPG. Continue Heating Cement Unit. Leak test all lines and plumbing. 15:00 17:30 2:30 Ensure engine, hydraulics, and pumps in working order. 17:30 18:30 1:00 Run Cement Lines to Well. Line Up well to take cement returns. 18:30 18:45 0:15 Secure Well for evening. Shut in BOPS, shut in floor valve. Total Hours: Remarks: SL #1 DOR SL #1 DOR Daily Operations Report Well Name: Square Lake Test Well #1 Operator: BLM Report #: 3 1 -Mar -18 Well Type: Oil &Gas Exploration Well API #: 50-119-10007-00-00 Report Date: Field: NPR -Alaska PTD #: 100-1160 Contract#: L16P000005 Contacts Weather Supervisor; P Shane Phone #: (801) 556-0946 Gen. Conditions: Calm McGeehan Site Manager: Phone #: 907-232-9952 Phase: James Nunley Proj Eng: tach Sayers Phone #: 281-615-1408 lWind Direction: East BLM PI: Amanda Eagle Phone #: lWind Gusts (mph): 5-15 MPH Temp. (Low, High): -12 -1 Well Status TD: 3,987 GL, ft: 340' Planned Days: 4 PBTD: 728 IRKS, ft: 16' Start Date: 27 -Feb -18 Fluid in Well: Water Base Mud OH ID, in: 95/8" Operation Days: 3 Last BOP Test: 2/27/2018 Last Safety Mtg: 3/1/2018 Last Evac Drill: 2/28/2018 'Csg String OD (in) Depth (ft) Weight (#/ft) Integrity Issues Outer Most: Conductor: 133/8 110 54.5 2 thermistor cables Surface: 103/4 728 55.5 Production: Pump Parameters Pump # Type Model Rate (BPM) Pressure (psi) Triplet Mud Pump W11 1.0 0-50 psi Mud / Brine Properties Fluid Type Weight (ppg) Volume (bbls.) Clear NaCl Brine 9.5+ 26.53 - .. - .„..� Cumulative Volume (bbls): 26.53 Waste Fluids Fluid Type Weight (ppg) Daily Volume (bbls.) CLASS I: Cement Rinsate N/A 6.66 CLASS II: Cement Returns N/A 3.07 Cumulative Volume (bbls): 9.736024845 Operations Report 24 Hour Cement Wellbore, RDMO Summary: 24 Hour Remove BOPS, Cutoff Casing, Backfill Cellar, Mobilize to next location Forecast: HSE Summary: No Accidents, No Incidents, No Spills. From To Hours Operational Details (6:00 - 6:00) Turn on Pumps and circulate wellbore. Startup Cement Unit, heat cement liquid additives (frozen). Pressure Test Cement Lines to 2,000 psi (pass). Position 7:00 8:00 1:00 excavator to pick sacks. SIMOPS: Start up Rig Takeon water into cement unit. 8:00 8:30 0:30 Continue to prepare cement unit (lubricate fluid end of triplex, change out gear oil, top off engine fluids) MU cement hose, & prepare cement head. 8:30 9:00 0:30 SIMOPS: Close BOP rams (lower 1-1/4" rams), take returns out of flow cross. 9:00 9:15 0:15 PJSM Shut down. Heater down and liquid adds still frozen. Work on heater units. Unthaw liquid additives with remaining 9:15 10:30 1:15 working heater. Begin Cement Job Perform cement abandonment in the 10-3/4" casing from 129' to surface. Take on 6.1 bbls of fresh water, add 4 gal of retarder and 0 gal defoamer. Wet yield 0.93 ft3/sk, mix water 3.556 gal/sk Batch mix 75 sacks of ArticSet I Class'G' cement and mix to 15.6ppg. 10:30 11:30 1:00 Begin Batch Mixing at 10:35 AM. Pumped 12 bbls of 15.6 ppg cement down 1-1/4" workstring taking returns up the IA at 1.0 bpm, 0-30 psi. cement returns noted after 9 bbls away. Cement in place at 11:17 AM on 3/1/17. Cement returns weighed 15.4ppg POOH with 1-1/4" workstring. LD sideways from 129' MD to surface. 11:30 11:45 0:15 SIMOPS: clean cement unit. Clean and clear all surface equipment of cement. Wash down all lines and tools. Break down cement manifold, and 11:45 12:15 0:30 returns lines. Flush BOP Stack and cycle BOP rams while flushing. Flush flow cross, Drain stack 12:15 13:15 1:00 SIMOPS: clean cement unit Break for lunch 13:15 13:45 0:30 Break down rig (remove slide out floor panels, move roof panels, lower mast). Winterize Triplex Pump and circulation 13:45 15:00 1:15 equipment. Transfer Class II fluids (brine) to ISO tank for re -use on next well. SIMOPS: clean cement unit, winterize unit, and prepare for demob. Ready at 3:00 PM. Load cement unit onto lowboy trailer. 15:00 17:30 2:30 SIMOPS: Continue to prepare rig for demob. Rig ready at 5:30 PM. Skid Rig out of place. Breakdown hardline, pack up heaters, organize tools and equipment, load heaters, clear pad of 17:30 19:00 1:30 debris. Total Hours: 12:00 Remarks: SL #1 DOR Daily Operations Report Well Name: Square Lake Test Well #1 Operator: BLM Report #: Well Type: Oil & Gas Exploration Well API #: 50-119-10007-00-00 Report Date: 4 2 -Mar -18 L16PC00005 Field: NPR -Alaska PTD #: 100-1160 Contract Contacts Weather Supervisor: Shane Phone M. (801) 556-0946 Gen. Conditions: Calm McGeehan Site Manager: James Nunley Phone #: 907-232-9952 Phase: - Proj Eng: Zach Sayers Phone #: 281-615-1408 Wind Direction: East BLM PI: Amanda Eagle Phone #: Wind Gusts (mph): 5-15 MPH Temp. (Low, High): 5 20 Well Status TD: 3,987 GL, ft: 340' Planned Days: 4 PBTD: 728 RKB, ft: 16' Start Date: 27 -Feb -18 Fluid in Well: Water Base Mud OH ID, in: 9 5/8" Operation Days: 4 Last BOP Test: 2/27/2018 Last Safety Mtg: 3/2/2018 Last Evac Drill: 2/28/2018 Csg String OD (in) Depth (ft) Weight (#/ft) Integrity Issues Outer Most: Conductor: 133/8 110 54.5 2 thermistor cables Surface: 103/4 728 55.5 Production: Pump Parameters Pump # Type Model Rate (BPM) Pressure (psi) Triplex Mud Pump Wll 1.0 0-50 psi Mud / Brine Properties Fluid Type Weight (ppg) Volume (bbls.) Clear NaCl Brine 9.5+ 26.53 Cumulative Volume (bbls): 26.53 Waste Fluids Fluid Type Weight (ppg) Daily Volume (bbls.) CLASS I: Cement Rinsate N/A 6.66 CLASS II: Cement Returns N/A 3.07 Cumulative Volume (bbls): 9.736024845 Operations Report 24 Hour Summary: Remove BOPS, Cutoff Casing, Backfill Cellar, Mobilize to next location 24 Hour Forecast: Final Report HSE Summary: No Accidents, No Incidents, No Spills. From To Hours Operational Details (6:00-6:00) 7:00 9:30 2:30 Remove BOPS. Inspect 13-3/8" x 30-3/4" annulus for cement. Annulus full of cement. No top job necessary. SIMOPS: Prepare ISO tank and Taco Sled, Perform boiler maintenance and repair. * One thermistor seen at surface 9:30 11:00 1:30 Cutoff 30-3/4" casing with Oxygen -acetylene torch 5' below ground level. Remove casing piece from cellar. Cement observed at surface inside 10-3/4" casing. Load up Boiler unit and hose conex. SIMOPS: Work with SLR on contaminated soil containment and removal. 11:00 11:30 0:30. Break for lunch 11:30 13:00 1:30 Inspect 10-3/4" casing cement job. Complete 500 psi compressive strength test. Passed. Compressive strength test observed by BLM representative Amanda Eagle. Weld marker plate onto 13-3/8" casing leaving weep hole. 13:00 13:00 Total Hours: Remarks: 0:00 6:00 OCS mobilizing equipment to next well. Wells group assist loading and strapping loads. SLR and Excavator to continue soil remediation and final well burial through the afternoon. * Final Report for well SL #1 DOR • 0 iob- /iw Davies, Stephen F (D From: Davies, Stephen F (DOA) Sent: Wednesday, June 27, 2018 2:58 PM To: 'Jessie Chmielowski'; Guhl, Meredith D (DOA) Subject: RE: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again Jessie, We will go with the contractor's coordinates in our database. Thanks for your help, Steve Davies Alaska Oil and Gas Conservation Commission (AOGCC) 907-793-1224 CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, contains information from the Alaska Oil and Gas Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwardjng it, and, so that the AOGCC is aware of the mistake in sending it to you, contact Steve Davies at 907-793-1224 or steve.davies@alaska.gov. From: Jessie Chmielowski [mailto:jchmielowski@blm.gov] Sent: Wednesday, June 27, 2018 11:59 AM To: Davies, Stephen F (DOA) <steve.davies@alaska.gov>; Guhl, Meredith D (DOA) <meredith.guhl@alaska.gov> Subject: Fwd: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again Hi Steve, Please read the email below from the contractor regarding the location of Square Lake #1. Let me know if the pictures don't come through clearly. Thanks, Jessie ---------- Forwarded message --------- From: Zach Sayers <zsavers@olgoonik.com> Date: Wed, Jun 27, 2018 at 11:40 AM Subject: RE: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again To: Jessie Chmielowski <ichmielowski@blm.gov> I understand. This well was a difficult well to find using the USGS reports. We found coordinates from multiple source! indicating different locations. Our final confusion point was the same as arrived on below: Is the well on the East side West Side of the stream. From the sight visit, it was clear that the well was indeed on the East side of the creek. The below screen shot depicts the three different location points (2013 BLM report, AOGCC email coordinates, and actual) The blue trail is the search path conducted on August 8th, 2017 to find the well. • AOGCC Coordinate Check 27 June 2018 • INPUT OUTPUT Geographic, NAD83 State Plane, NAD27 5005 - Alaska 5, U.S. Feet Accuracies of conversions from NAD 83 to NAD 27 are typically 12 to 18 cm. Square Lake 1 1/1 Latitude: 69 33 11.0336 Northing/Y: 5686608.031 Longitude: 153 16 54.6722 Easting/X: 592276.388 Convergence: 0 40 32.72336 Scale Factor: 0.999909674 Datum Shift (m): Delta Lat. = 44.765, Delta Lon = -118.622 i44 Z-7- /Of Remark: Corpscon v6.0.1, U.S. Army Corps of Engineers Davies, Stephen F (DOA) From: Jessie Chmielowski <jchmielowski@blm.gov> Sent: Wednesday, June 27, 2018 11:59 AM To: Davies, Stephen F (DOA); Guhl, Meredith D (DOA) Subject: Fwd: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again Attachments: image004.png; image003 jpg; image005 jpg Hi Steve, Please read the email below from the contractor regarding the location of Square Lake #1. Let me know if the pictu don't come through clearly. Thanks, Jessie Forwarded message From: Zach Sayers <zsavers@olgoonik.com> Date: Wed, Jun 27, 2018 at 11:40 AM Subject: RE: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again To: Jessie Chmielowski <lchmielowski@blm.gov> I understand. This well was a difficult well to find using the USGS reports. We found coordinates from multiple source indicating different locations. Our final confusion point was the same as arrived on below: Is the well on the East side West Side of the stream. From the sight visit, it was clear that the well was indeed on the East side of the creek. The below screen shot depicts the three different location points (2013 BLM report, AOGCC email coordinates, and actual) The blue trail is the search path conducted on August 8th, 2017 to find the well. We were certain that we had found the correct well given the following: No wells (or any other debris) were found in any of the other locations noted in the well files. 2. This was the only well observed in a 1 mile search radius. 3. The surface pictures noted on the 2013 BLM report matched exactly with the 2017 site visit fi 2017 Site Visit: 4. Casing sizes, cellars, and thermistor cable placement matched exactly to the historical reports. I hope this helps. Please let me know if there is anything else I can provide. Jessie Chmielowski, P.E. Sr. Petroleum Engineer Bureau of Land Management 222 W. 7th Ave., #13 Anchorage, AK 99513 Office (907) 271-4190 Legacy Wells Summary Report Square lake #1 Figure 3: Square Lake #1 contains a wooden cellar full of water and cement around open casing (July 2012). Figure 4: Square Lake #1 contains a wooden cellar full of water and cement around open casing Quly 2012). BLM Open File Report 127 • May 2013 =177 m Davies, Stephen F From: Davies, Stephen F (DOA) Sent: Wednesday, June 27, 2018 9:10 AM To: 'Jessie Chmielowski' Cc: Guhl, Meredith D (DOA) Subject: RE: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again Jessie, Yes, Square Lake 1 is the only well with a significant problem. The map on Figure 34 of USGS Prof Paper 305-H places Square Lake 1 on the west side of the nearby stream, whereas the coordinates provided on the Well Completion Report and the spreadsheet place the well on the east side of the stream, about 500' to the southeast. My screen -shot of the Google Earth photo shows my best estimate of the location based on the USGS Figure 34 map, and it shouldn't be too far off as the stream course is fairly distinctive in this area (I'm assuming, of course, that the USGS folks knew which sid( of the stream they were drilling on). Would you happen to have any contractor photos from the wellsite that might hel us sort this out a bit better? Thanks, Steve Davies Alaska Oil and Gas Conservation Commission (AOGCC) 907-793-1224 CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, contains information from the Alaska Oil and Gas Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwardin it, and, so that the AOGCC is aware of the mistake in sending it to you, contact Steve Davies at 907-793-1224 or steve.davies�ov. From: Jessie Chmielowski (mailto:jchmielowski@blm.gov] Sent: Wednesday, June 27, 2018 8:41 AM To: Davies, Stephen F (DOA) <steve.davies@alaska.gov> Subject: Re: [EXTERNAL] RE: Coordinate Conversion Question - Revised Again Hi Steve, Thank you for checking the well locations. The information I sent is based on GPS data collected by the contractor in August 2017 during site visits to each well. I'll attach the spreadsheet with coordinates for all 5 wells. It's possible I mis- transcribed something. The Lat and Long in box 4a are NAD 83 and in box 4b are NAD 27. 1 think that the location data from August 2017 is pretty accurate. Is Square Lake the only well causing difficulties? Jessie On Tue, Jun 26, 2018 at 7:18 PM Davies, Stephen F (DOA) <steve.davies@alaska.gov> wrote: Jessie, Taking this further: I place the surface location at about NAD 83 lat 69 33 14.16, long -153 17 03.25 based on USGS Professional Paper 305-H Figure 34, the location description on page 424 of that paper, and the configuration of the NAD 27 State Plane AK Zone S Easting Northing 563,868.05 5,622,337.54 564,475.58 5,629,559.99 563,418.68 5,622,198.41 431, 521.71 5,636,962.40 592,276.39 5,686,608.03 Wolf Creek #4 1 1 1 1 i 1 1 711.6 1 3326 1 3435 1 1954 1 1845 1 Sec 9, T1S, R6W 1 1 584,114 1 5,618,548 • 0 NAD 83 {Decimal Degrees) NAD 83 (Degrees Minutes Seconds) NAD 83 State Plane AK Zone 5 Elevation Public Land Survey System (PLSS) Legal Description - Umiat Meridian Well N Latitude W Longitude N Latitude " W Longitude ': Northing Easting (NAVD88) FWL '. ENL FWL ENL (township, range, section) Wolf Creek #1 69.3782208109 -153.507909785 69°22'41.5949" -153`30'28.4752" 5,622,057.689 1,703,893.602 669.5 3,766.21 4,734.94 1,513.79 545.06 T1S R7W S25E Wolf Creek#2 69.3979424615 -153.502746140 69°23'52.5929" -153.30'09.8861" 5,629,280.086 1,704,501.045 401.7 2,157.90 2,797.50 3,122.10 2,482.50 T1N R7W S36SW Wolf Creek#3 69.3778504919 -153.511401886 69`22'40.2618" -153`30'41.0468" 5,621,918.565 1,703,444.230 691.3 3,315.61 4,870.99 1,964.39 409.01 T1S R7W S2SE Titaluk #1 69.4180608533 -154.534897576 69`25'05.0191" -154°32'05.6313" 5,636,683.172 1,571,545.339 846.8 1,094.51 708.32 4,185.49 4,571.68 T1N R11W S26NW Square Lake #1 69.5530648998 -153.281853400 69°33'11.0336" -153"16'54.6722" 5,686,327.625 1,732,301.634 361.4 4,287.28 4,104.37 992.72 1,175.63 T2N R6W S2SE NAD 27 State Plane AK Zone S Easting Northing 563,868.05 5,622,337.54 564,475.58 5,629,559.99 563,418.68 5,622,198.41 431, 521.71 5,636,962.40 592,276.39 5,686,608.03 Wolf Creek #4 1 1 1 1 i 1 1 711.6 1 3326 1 3435 1 1954 1 1845 1 Sec 9, T1S, R6W 1 1 584,114 1 5,618,548 • 0 Davies, Stephen F From: Davies, Stephen F (DOA) Sent: Tuesday, June 26, 2018 7:15 PM To: 'Chmielowski, Jessie' Cc: Guhl, Meredith D (DOA) Subject: RE: Coordinate Conversion Question - Revised Again Attachments: Binder1.pdf Jessie, Taking this further: I place the surface location at about NAD 83 lat 69 33 14.16, long -153 17 03.25 based on USGS Professional Paper 305-H Figure 34, the location description on page 424 of that paper, and the configuration of the nearby stream on the 2010 -vintage photo in Google Earth (attached). My estimated NAD 27, ASP coordinates are also included. Let me know what you think. Thank you, Steve Davies AOGCC CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, contains information from the Alaska Oil and Gas Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwarding! it, and, so that the AOGCC is aware of the mistake in sending it to you, contact Steve Davies at 907-793-1224 or steve.davies@alaska.eov. From: Davies, Stephen F (DOA) Sent: Tuesday, June 26, 2018 6:22 PM To:'Chmielowski, Jessie' <jchmielowski@blm.gov> Cc: Guhl, Meredith D (DOA) <meredith.guhl@alaska.gov> Subject: RE: Coordinate Conversion Question - Revised Jessie, I worked through these again with better results. The only one that seems to be significantly different between the lat/long and X,Y coordinates is Square Lake 1. Possibly due to a typo in the coordinates? Could you please check these for me? Thank you, Steve Davies AOGCC CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, contains information from the Alaska Oil and Gas Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwarding it, and, so that the AOGCC is aware of the mistake in sending it to you, contact Steve Davies at 907-793-1224 or steve.davies(@alaska.eov. From: Davies, Stephen F (DOA) Sent: Tuesday, June 26, 2018 2:14 PM To: 'Chmielowski, Jessie' <]chmielowski@blm.gov> Cc: Guhl, Meredith D (DOA) <meredith.guhl@alaska.gov> Subject: Coordinate Conversion Question Jessie, I'm working through the Well Completion Reports that BLM submitted for Square Lake, Wolf Creek, and Titaluk wells, and I'm having a difficult time reconciling the surface coordinates. Are the lat / long values provided in box 4Aa on each of these forms NAD 83 coordinates? How were the NAD 27 Alaska State Plane location coordinates in box 4B determined? When I try to reconcile these coordinates, I'm off by many hundreds of feet. Thank you, Steve Davies AOGCC CONFIDENTIALITY NOTICE. This e-mail message, including any attachments, contains information from the Alaska Oil and Gas Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwarding it, and, so that the AOGCC is aware of the mistake in sending it to you, contact Steve Davies at 907-793-1224 or steve.daviesC@alaska.gov. AOGCC Estimated Surface Location Coordinates 26 June 2018 INPUT Geographic, NAD83 OUTPUT State Plane, NAD27 5005 -Alaska 5, U.S. Feet Accuracies of conversions from NAD 83 to NAD 27 are typically 12 to 18 cm. Square Lake 1 1/1 Latitude: 69 33 14.16 NorthingtY: 5686922.262 Longitude: 153 17 03.25 Easting/X: 591967.827 Convergence: 0 40 24.70040 Scale Factor: 0.999909609 Datum Shift (m): Delta Lat. = 44.769, Delta Lon = -118.627 Remark: Surface location estimated from USGS Prof Paper 305-H, Figure 34 zc.- /o Corpscon v6.0.1, U.S. Army Corps of Engineers lbb -/�� vA�L IeLr4 6.ZZ, ,16 Square Lake 1 (100-116) Surface location estimated from Figure 34 in USGS Prof Paper 305-H AOGCC June 26, 2018 . 1 EXPLANATION Structure contours, dashed where approximate. Contour interval 100 feet; datum is mean sea level ON shed where Contour interval Dry hole X�5 TEST WELL I 8000 0 8C:�O Fleet FIGURE 34.—Structure-contour map of Square Lake anticline drawn by United Geophysical Co., Inc., on a seismic horizon in Cretaceous rocks. ' AOGCC • Coordinate Conversion Check 26 June 2018 INPUT OUTPUT State Plane, NAD27 Geographic, NAD83 5005 -Alaska 5, U.S. Feet Accuracies of conversions from NAD 27 to NAD 83 are typically 12 to 18 cm. t Northing/Y: 5686608 Gtr Easting/X: 592276.4 i Convergence:0 40 32.72366 Scale Factor: 0.999909674 Square Lake 1 1/1 Latitude: 69.553064805 Longitude: 153. 281853301 Datum Shift (m.): Delta Lat. = -44.765, Delta Lon = 118.622 Remark: Corpscon v6.0.1, U.S. Army Corps of Engineers Form 3160-5 UNITEtSTATES • FORM APPROVED (June 2015) OMB Na 1004-0137 DEPARTMENT OF THE INTERIOR Expires:January 31,2018 BUREAU OF LAND MANAGEMENT 5.Lease Serial No. N/A SUNDRY NOTICES AND REPORTS ON WELLS 6.If Indian,Allottee or Tribe Name Do not use this form for proposals to drill or to re-enter an abandoned well.Use Form 3160-3(APD)for such proposals. NIA SUBMIT IN TRIPLICATE-Other instructions on page 2 7.If Unit of CA/Agreement Name and/or No. 1.Type of Well N/A ❑Oil Well 0 Gas Well m Other 8.Well Name and No.Square Lake Test Well#1 2.Name of Operator Bureau of Land Management 9.API Well No.50-119-10007-00-00 3a.Address 222 W.7th Ave,#13 Anchorage,AK 99513 3b.Phone No.(include area code) 10.Field and Pool or Exploratory Area (907)2714354 Wolf Creek,NPR-Alaska 4.Location of Well(Footage,Sec.,T.,R,M.,or Survey Description) 11.Country or Parish,State 4,287'FWL,4,104'FNL,T2N,R6W,S2,Umiat /Lat:69.5530648998,Long:-153.271853400 North Slope Borough,AK 12.CHECK THE APPROPRIATE BOX(ES)TO INDICATE NATURE OF NOTICE,REPORT OR OTHER DATA TYPE OF SUBMISSION TYPE OF ACTION ©Notice of Intent ❑Acidize ElDeepen ❑Production(Start/Resume) El Water Shut-Off 0 Alter Casing ❑Hydraulic Fracturing ❑Reclamation D Well Integrity 0 Subsequent Report 0 Casing Repair ❑New Construction 0 Recomplete ElOther ❑Change Plans ©Plug and Abandon 0 Temporarily Abandon Ej Final Abandonment Notice Ej Convert to Injection D Plug Back ❑Water Disposal 13. Describe Proposed or Completed Operation:Clearly state all pertinent details,including estimated starting date of any proposed work and approximate duration thereof.If the proposal is to deepen directionally or recomplete horizontally,give subsurface locations and measured and true vertical depths of all pertinent markers and zones.Attach the Bond under which the work will be perfonned or provide the Bond No.on file with BLM/BIA.Required subsequent reports must be filed within 30 days following completion of the involved operations.If the operation results in a multiple completion or recompletion in a new interval,a Form 3160-4 must be filed once testing has been completed.Final Abandonment Notices must be filed only after all requirements,including reclamation,have been completed and the operator has detennined that the site is ready for final inspection.) Plug and Abandon the wellbore. p(p /66- 06 Please see the attached procedures. tiN ‘)Cv/— \ (6_ 5 „,, u\r-5-r , 7 ,i., A, , ,,,, it , ,,,, 14.I hereby certify that the foregoing is true and correct Name(Printed/7yped) Zach Sayers Engineering Manager Title i Signature / Date 10/19/2017 411401111rSPACE FOR FEDERAL OR STATE OFICE USE Approved by AC7f144. ENgicr.Y � // Title ZgAmci.l CR Date II/27 Conditions of approval,i any,are attached.Approval of this notice does not warrant or certify that the applicant holds legal or equitable title to those rights in the subject lease Office ` which would entitle the applicant to conduct operations thereon. Title 18 U.S.0 Section 1001 and Title 43 U.S.0 Section 1212,make it a crime for any person knowingly and willfully to make to any department or agency of the United States any false,fictitious or fraudulent statements or representations as to any matter within its jurisdiction. (Instructions on page 2) • • Olgoonik sb Construction : ,..,.„mi, Services LLC Plug and Abandonment Operations Program Square Lake Test Well #1 Wolf Creek Legacy Wells Remediation NPRA, Alaska October 2017 Prepared By: Zach Sayers, OCS Olgoonik Construction Services, LLC 3201 C Street,Suite 700 Anchorage,Alaska 99503 VERSION HISTORY Version Implemented Revision Approved Approval Reason # By Date By Date 1.0 Zach Sayers 10/19/17 Olgoonik • Plug&Abandonment Plan Construction BIM-NPRA Legacy Well Remediation Services u_c L17PD00146/MOD 1—Wolf Creek Cluster Table of Contents 1 General P&A Design 3 2 Equipment & Supplies 3 3 P&A Procedures 5 3.1 Square Lake#1 5 Table of Figures Figure 1: Alternative Diverter Diagram 4 Figure 2: SL#1 Current Completion Schematic 7 Figure 3: SL#1 Proposed Plugging Schematic 8 Figure 4: SL#1 Annuli Diagram 9 Olgoonik Construction Services ( General P&A Design 2 Olgoonik—ba • • Plug&Abandonment Plan Construction BLM-NPRA Legacy Well Remediation Services LLC L17PD00146/MOD 1—Wolf Creek Cluster 1 General P&A Design The primary goal is to leave these wells abandoned as per the task order specifications and requirements while reducing the amount of waste generated.The following assumptions will be used for each wellbore in the Task Order: • All P&A procedures will be agreed upon and in accordance with BLM regulations prior to execution. • Forty-Eight hours prior to P&A operations commence, BLM representatives will be notified. 2 Equipment & Supplies OCS and its team will provide the following well specific equipment: • Boart Longyear 1.X10 Multi-Purpose Drilling Rig o 197hp multi-purpose drill rig o Dressed to handle%", 1-1/4",and 2-7/8"work strings o Standard Workstring: 2-7/8"w/external upset tool joints • Well Control Equipment: o 7-1/16"3M Double Gate Manual BOP Ram • Upper Ram: 2-7/8" Pipe Ram • Lower Ram: 1-1/4" Pipe Ram o 7-1/16" 3M flow Cross • Portable Cementing Equipment Including o 28bbl Cement batch mixing unit o Triplex Pump used for cement • Storage Tanks o 200 bbl (8,400 Gallons)of storage tank capacity to contain circulated well fluids. o 24 bbl Rig Tank/Mixing Pit o Waste/Slop Tank • Plug and Abandonment Marker o Each well shall be sealed with a metal%"thick metal plate,welded in place with well information inscribed on the plate. Each plate will have a weep hole and be sized for each casing. • Transfer pump,with Backup Pump, Heaters, Pipe, hoses,valves,fittings • Vacuum Unit • Boiler Unit • Track Loader • Excavator rffiv Olgoonik Construction Services General P&A Design Olgoonik • 0 Plug&Abandonment Plan Construction BLM-NRA Legacy Well Remediation Services llc L17PD00146/MOD 1—Wolf Creek Cluster l . .. —► Choke i , , t . Dive,erUne(170 • f .'- y: i Drip Pan ,t ` Drip Pan 1, 7.1/16'Pitche-hippie Atzer,blp I i i e :—.----------P....:1-11/j ! --_ •.: isimilthaiY I . it 1 1fir,,," 2-1:16"15,00021i la To-q;ie Valve:: i _ Kili „ _ �+ ..r ' - - / �� REV. DESCRIPTION DATE 5? :rt'.hn'^er A ORIGINAL DRA'W'ING 2/22/17 7.15 Z CHSAYERS Olgoonik liatt 5 Update to ff DomPittnerNipple 4/21/17 ZIS `z COrtulrl1C110n Se C Update DSA 5109.2017 ZIS 10,19,2017rviBS L,,[ D Update to 7-1116*BOP 512712017 ZtS = fp =s er TITLE E Gere*alUpdates 6/072017 Z15 FIELD Ah_ernatveDive-terPropotal G Uad:te Choke 10/1$;17 ZIS 041-03 Sr s cr FIELD 1:24 10/1912017 Figure 1:Alternative Diverter Diagram Olgoonik Construction Services I Equipment&Supplies 4 Olgoonik •• • Plug&Abandonment Plan Construction BLM-NPRA Legacy Well Remediation Services�t_c L17PD00146/MOD 1—Wolf Creek Cluster 3 P&A Procedures 3.1 Square Lake #1 Square Lake Test Well#1 was drilled by the U.S. Navy in 1952.The last known site inspection was August 2017.This well was drilled to a TD of 3,987' MD with the 10-3/4"casing string having been set at 728' MD Gas was found between 1,640 and 1,675 feet. Four cement plugs were set with the top most plug at 728' MD. From the research it appears that the water based drilling mud was left in the hole and left to freeze in the wellbore. It is also noted that the mud was bailed down prior to leaving the well to a depth of 225'. It is assumed that the wellbore has since filled with fresh water. The USGS reports note that thermistor cables were placed in the wellbore prior to leaving the well at 200'and 540'. 3.1.1 Deviation Requests&Clarifications: 1. OCS wishes to highlight its intention to use a manually operated double gate pipe ram well control device for this well in place of a hydraulic operated annular well control device.This device will act as the secondary well control device(Diverter)for this well.This diverter system is depicted in Figure 1. 2. OCS wishes to clarify that no casing pressure test will occur.Specifically OCS will not perform a casing test as specified in 00#2111.13.1.h. 3. OCS wishes to clarify that the planned plug(surface to 121' MD) is approved as final P&A plug for this well in variance with 00#2 III.G.2&4. Specifically the existing cement plugs at and below the surface casing will be left in place,and an additional surface plug from 121' MD to surface will be placed. 4. OCS requests variance for 00#2 III.C.6. OCS requests to use personal H2S monitors in lieu of the gas detection equipment due to the open air environment used for these P&A's. 5. OCS requests variance for 00#2 III.C.7. OCS requests to omit the use of an ignition system for the flare line/ diverter line. 6. OCS wishes to clarify that the annular spacing of the OA(10-3/4" x 13-3/8")(0.35")does not allow for the collar OD of 1-1/4" rigid Schedule 80 steel pipe(1.900") (See Figure 4).Should cement not be observed at surface:a top job (no pipe entry into annulus)will be performed. 3.1.2 Fluids Program: Hole Size: Fluid Type: Density(ppg) 9.76" ID csg NaCI Brine system 8.6—9.8 *Ensure sufficient material on hand to make contingency kill weight brine 3.1.3 Cementing Program: Conductor P&A Plug Cement Hole Size Csg Size Type Density Yield %Excess Volume Est.TOC N/A 9.76" Class G 15.6 ppg— 0.93 ft3/sx 10 10.7 bbl Surface Artic Blend 15.8 ppg 3.1.4 Well Control Program: BOPE/Diverter 7-1/16" 3M Double Gate Manually Operated Rams Upper Ram—2-7/8"pipe ram; Lower Ram—1-1/4"pipe ram CHOKE MANIFOLD 2"Choke line w/(x2) manual adjustable chokes. ACCUMULATOR N/A Maximum Anticipated BHP 8.27 ppg x 0.052 x 1,860 ft=800 psi *(should the well be re-drilled and the full fluid column completely evacuated) Maximum Anticipated Surface 800 psi—(0.22 psi/ft)*(1,860')=391 psi Pressure(MASP) *(should the well be re-drilled and the full fluid column completely evacuated) Olgoonik Construction Services I P&A Procedures Olgoonik • • Plug&Abandonment Plan Construction BLM-NPRA Legacy Well Remediation Services tic L17PD00146/MOD 1—Wolf Creek Cluster Planned BOP Test Pressure N/A—Function Test Diverter Only Casing Test Pressure(16") none Casing Test Pressure(10-3/4") none 3.1.5 Site&Well Prep Operations: 1) Move in all support equipment and rig up. Prepare well site as necessary. Install starting head. 2) RU Diverter and function test to ensure operational. o Pressure ram cavity to 200 psi for 5 min. Do not chart.Visually inspect for leaks 3.1.6 Plugging Operations: 3) Pick up work-string, and circulate with heated NaCl brine while slowly tripping in the hole to 121' MD as necessary. 4) Circulate Bottoms Up(CBU)and monitor well for 5 minutes to ensure no flow. 5) Rig up cementing equipment and cement to surface with permafrost cement through the work string pumping until clean cement is observed at surface. 6) TOOH and LD work string. 7) Wait On Cement(WOC)at least 12 hours. Meanwhile, rig down all mixing, pumping and related equipment and standby until wellhead has been removed (standby with required cement equipment/ materials for possible annuli top job). 3.1.7 Post Rig Operations: 8) Using excavator,excavate around the wellhead to a depth up to of 6-8' below tundra level. 9) After WOC period is finished and using a cutting torch or a casing saw, cut all casing and tubing strings off to leave well severed>5'below tundra level. 10) Inspect all annuli for cement to surface. Contingency Procedure: If cement not observed in OA(10-3/4" x 13-3/8"): a. Mix and top fill void with artic grade cement until full. 11) Remove original cellar,wellhead and severed casing/tubing and prepare for transport. 12) Top off all annuli with cement if necessary. BLM representative to witness. 13) Weld a 1/4"thick, 13-3/8"diameter steel marker plate over the top of the cut-off well casing. BLM representative to witness. o Have contingency 16-1/2" plate on location in case conductor jacket is unearthed in dig-out. 14) Marker plate to have the following information bead-welded onto the top. a. Square Lake#1 b. API#50-119-10007-00-00 c. PTD#100 1160 15) Back-fill excavation with original soil.Top excavation with five yards of clean gravel, mounding it over the well to compensate for settling as soil thaws. 16) Clean location, obtain site clearance approval from BLM representative on location and prepare all personnel, equipment and materials for demobilization. Olgoonik Construction Services I P&A Procedures • Olgoonikb • • Plug&Abandonment Plan Construction BLM-NPRA Legacy Well Remediation Services LLC L17PD00146/MOD 1—Wolf Creek Cluster Location of Well Cardinal No.2 Rotary Rig Satre mmenrsecric^: 4,297'Fk11. 4,204 F,°.'i 72. .R5W,52. 'tt&t&feticion spud:January 26„,1952 State Pone Coordinates:X:592,276.39 Y_5,556,607.03 Zone 5(N D27) Completed:April13th,1952 LOtitudeftongituoe: 6933'12_0336''N/153'1514.6722'W 16'MDJ VD iprJnal Ground Levu -- I Bailed dry to 225 MD/TC:D 2 thermistor cables* ^T a hc.+a was ra 225'r.74 trtcwn,J4 `assumed 2 from historic notes.(260&5401 rrawa,user r errv.,,a4,alct a 10.4 4—n tiPp!c+sa�oj ra rho rep a;rha cast cg.1-3,-;r abc,,a:ha yr;ur.4.' 17-1/2”OH to 130'MD/IVO .41 k CONDUCTOR 13-318`,51.58,1-55 5T.#i5 C56 to 116'MID/TVD 412.615"ID,12.459"Drift,2,730 Burst,1,130 Collapse) 4 its range 2 12.1 ppg WBM left in hole Cemented with S5 sx of Ca?-Seal Expected to be a Augagel&Baroid based system Expected TOC at surface thaw bulb forced secondary top job: 35 sks Cal-Seal&10 sks High Early ant 12-1/4"OH f/130'MD t/728'MD/TVD SURFACE CASING Cement Plug 4/18/1952 16-3/4',55.5=,Hydril stream lined CSG to 726'MTV D/ D "� °"' 1:9.76"ID,4.604"Drift,6,450 Burst,4,020 Collapse; Cement spotted from 700'-741'MD/TVD(41') Cemented with 166 sx of High Early ant At Expected TOC surface 12-1/4"OH most likely collapsed{drawn as open) '1S' ement Ply: -4 18 195 , A 22 stL Cement spotted from 1,640-1,840'MD 71-VD(204') Cement Plug-4/18/1952 µ=-- Cement spotted from 1,865-1,934'MD tTWD 169`1 Cement Plug-4/18/1952 ,x .'',E Cement spotted from 2,745-2,935'MD/WO 1190') soul-11h Early ant 9-5/8"OH f/728'MD t/3,978'MD/ND 7-1/2"OH f/3,978'MD t/3,987'MD/1WD Square Lake Test Well#1 Current Completion Schematic TD:3,987'MD/TVD Wolf Creek Exploration Area Olgooniklibt PBTD:728'MD NPRA,Alaska Guilf,rtuCtiOrl wt. API#50-119-10007 PTD;#100-1160 rn Set vices z ;: 10/19/2017 Elevation KB:340' RKB—GL:16' Figure 2: SL#1 Current Completion Schematic Olgoonik Construction Services I P&A Procedures 7 • Olgoonik •• • Plug&Abandonment Plan Construction BLM-NPRA Legacy Well Remediation Services Lac L17PD00146/MOD 1—Wolf Creek Cluster Location of Well Cardinal No.2 Rotary Rig 6oiemmenr 5e tio'. 4,247'FiW'L,4,104'Mil,T2247.45W 52,f/niar Mer id!on spud:January 26',1952 State Plane Coordinates:X:532276.399 Y:5.546,607 03 Zone 5 024027/ Completed:April18th,1952 Latitude/Lo ngitude: 59'3312 0335N/153'15'54.6722'U 16'MD/TVD(Original Ground Level) 5'Below Ground Level ----13-3/5'Marking date welded on with 1/8'weep hole Ta P&A Cement Plug u 2 thermistor cables* � � _ cement circulated up IA 'assumed 2,from historic notes.(206&540''1 �s� �` 121 Mi)—Ground Level r , 10.7 bbis total cement pumped(returns taken to surface) 64.5 sx Class`0'Artie Grade cmt ,. 0.930 ft3,1sk yield,15.6 ppg 4 = 17-1/2"OH to 130'MD/IVD .•=1 a:� -�. {pNDU{TC)R 13-3/8`,54.5it,1-55 SMIS CSG to 110'MD/TVD (12.615"ID,12.459"Drifts 2,730 Burst,1,130 Collapse) 4 its range 2 Cemented with 35 sx of cal-seal Frozen drilling fluid/water left in wellbore b e'n,ti Expected TOC at surface cement plug •thaw bulb forced secondary top job. 35 sks Cal-Seal Si 10 sks High Early cmt 12.1 ppg WBM left in hole Expected to be a Augagel&Baroid based system 12-1/4"OH f/130'MD t/728'MD/TVD x_,:,r ; SURFACE CASING Cement Plug4h8/1952 10-3/4`.5531,Hydril Stream Lined CSG to 725'MD.,TVD ' (9.76"18,9.604"Drift,6,450 Burst,4,020 Collapse; Cement spotted from 700'—741'MD Iru'D(41') Cemented with 160 sx of High Early cmc Expected TOC surface 12-1/4"OH most likely collapses!(drawn as openl H4•4 Cement Plug-4/18/1952 Cement spotted from 1,640—1,846'MD/TVD 1200') Cement Plug-4/18/1952 Cement spotted from 1,865—1,934'MD IND 169'i Cement Plug-4718/1952 Cement spotted from 2,745—2,935'MD/TVD 11901 SO sx High Early cmc 9-5/8"OH f/728'MD t/3,978'MD/TVD "OHf/3978MD 3,987' 71/2 t ' t/ MD/TVD Square Lake Test Well#1 Proposed Plugging Schematic TD:3,987'MD/TVD Wolf Creek Expioration Area Olgoonikiiw PBTD:Surface NPRA,Alaska , a,- t ott.aructlon API#50-119-10007 PTD#100-1160 25 Se1v Ices L.., 10/19/2017 Elevation K8:.340' RKB—GL:15' Figure 3:SL#1 Proposed Plugging Schematic Olgoonik Construction Services I P&A Procedures 8 Olgoonik v0 S Plug&Abandonment Plan Construction BLM-NPRA Legacy Well Remediation Services u_c L17PD00146/MOD 1—Wolf Creek Cluster 13-3/6",54.54 „4,0► , !�`+`sr�*+. t ❑ Collar �' ---------• Drift ,.„ .v, . 1.s,, N4 ,it,,.. s 1 0.34 f,� 1 44 0.35"Annular Spacing os41 tilltk 0, 1\4. *' • 40S ow- Square Lake Test Well#1 Annuli Diagram °G ir. 3 6 r 5 2 - 12 0 Wolf creek Eaftlo'ation Area Olgoonik NPRA,Alaska COn t,i,,ct n c,.,o„e`. Nit.ef, ue API 9F50-119-10007 PTD if 100-1160 La Sc;± -2.1 Figure 4: SL#1 Annuli Diagram Olgoonik Construction Services P&A Procedures .! ,z · . Image Project Well History File Cover Page XHVlE 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. 1 C2 0 - j 1 0 Well History File Identifier Organizing (done) o Two-sided ""1111111 III" III o Rescan Needed 11111111111" 11I111 RESCAN DIGITAL DATA OVERSIZED (Scannable) o Maps: o Other Items Scannable by a large Scanner o Color Items: o Greyscale Items: o Diskettes, No. o Other, NofType: o Poor Quality Originals: o Other: OVERSIZED (Non-Scannable) o logs of various kinds: NOTES: BY: ~ Dale 1/1f/07 o Other:: Project Proofing BY: ~ Date~/()7 3D + me ,,~IIIIIIIlIIli II III v» to lJ- = TOTAL PAGES :34- (Count does not include cover sheet) 151 151 BY: Date: Scanning Preparation Production Scanning "'11111111111 1111I Stage 1 Page Count from Scanned File: 35 (Count does include cover sheet) ¿YES NO 151 MP NO Stage 1 Page Count Matches Number in Scaring pr. eparation: ~ Daleq I Cfl D7 If NO in stage 1, page(s) discrepancies were found: YES BY: BY: Maria Date: 151 11111111111I11" III Scanning is complete at this point unless rescanning is required. ReScanned /1111111111111 1111I BY: Maria Date: 151 Comments about this file: Quality Checked 111111111111 1111111 10/6/2005 Well History File Cover Page.doc Explanation Page Permit Number 100-116 These well numbers (typically beginning with 100) precede the beginning of the Commission. No permits were issued and no formal folder of record (information) created. Information known to the Commission through other agencies, journals, reports, news or additional historical means has been collected and entered into a database of Well History information. If specific information exists, these pages may be filed in this folder. Occasionally, the information has been obtained from a report that may deal with a general area and many wells. If or when possible, we may be able to 'point' the person interested in this specific well to one or more of these information sources. However, at best, this will be incomplete and independent research should be conducted to locate, if available, further information about a particular well site. o>r r • THE STATE Department of Environmental 011-1LASKL'1 GOVERNOR SEAN PARNELL RECEIVED FEB 0 7 2014 February 4, 2014 A0GCC Certified Mail, Return Receipt Requested Article No.: 7012 2210 0002 1216 2391 Wayne Svejnoha BLM — Division of Resources 222 W 7th Ave, #13 Anchorage, Alaska 99513 Conservation Division of Spill Prevention and Response Contaminated Sites Program File: 320.38.010 SCANNED 0 2 2014 Re: Potentiall Responsible Party Notice Letter and Information Request NPRA Legacy Wells - General Hazard ID: 26125 Ledger Code: 14339387 Dear Mr. Svejnoha: 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.5105 This letter is to advise you that the Alaska Department of Environmental Conservation (ADEC) has identified the 136 legacy wells within the National Petroleum Reserve in Alaska (NPRA) as potential contaminated sites. Some of these wells require extensive cleanup of oil and other hazardous substances released to the environment. Since you are identified as a current or past owner and/or operator of these sites, please be advised you may be financially responsible or liable for the investigation and /or cleanup of any hazardous substance contamination that might be present. Alaska Statute 46.03.822 establishes who is liable for contamination. Records available to the ADEC indicate that you meet one or more of the following criteria: » owned or controlled the hazardous substance at the time of its release; » own(ed) or operate(d) the property or facility from which the release occurred; » owned or operated property at which the hazardous substance came to be located; and » arranged for transport, disposal or treatment of hazardous substances that were released. Site History From 1944 through 1982 the US Government drilled 136 wells to explore for oil and gas resources in the NPRA. It is our understanding that other federal agencies and some private companies may have operated or managed these sites in the past. We have also been informed that 23 of these well have been conveyed to public and private entities. The ADEC currently lists 14 of the 136 legacy wells on our database of contaminated sites. The Bureau of Land Management (BLM) is identified as the responsible party for the following sites. Wayne Svejnoha 0 2 February 4, 2014 • BLM Cape Halkett Drill Site (File # 300.38.108) • BLM East Simpson #2 (File # 300.38.109) • BLM East Teshekpuk Drill Site (File # 300.38.110) The U.S. Army Corps of Engineers, under the Formerly Used Defense Sites program, is working with ADEC under the Defense States Memorandum of Agreement on cleanup actions at the 11 Umiat test well sites. BLM is identified as the landowner in our records, and as such is identified as a potentially responsible party in addition to the Department of Defense: C Umiat Test Wells 1-11 (File # 335.38.001) The information contained in these files is part of the public record. Our databases are accessible on the Internet at: http://dec.alaska.gov/spar/csp/db_search.httn Additional Actions Needed ADEC sent a letter on July 11, 2013, identifying an additional 15 legacy well sites with confirmed releases (enclosed). As stated in the letter, ADEC recommends that BLM develop a plan to address known, suspected, and unknown releases at the legacy well sites, in coordination with the appropriate regulatory agencies. We expected a response to this letter before now. Please respond to this letter within 30 days. After we receive and review your response we will determine what additional actions will be taken regarding each site with known or suspected contamination. In addition, with your response, please complete and return the enclosed questionnaire requesting more information about past operators. In accordance with Alaska Statute Title 46, ADEC is authorized to provide regulatory oversight for any contamination response efforts initiated by the responsible party. However, if response actions by the responsible party are not satisfactory to ADEC, we may then assume the lead role in the investigation and cleanup efforts. In the event that State response actions are necessary, the responsible parties may be held financially liable for any response actions taken by the State. Alaska Statutes 46.04.010 and 46.08.070 establish cost recovery procedures for certain costs, including oversight activities, incurred by the State in responding to pollution incidents. If you are determined to be a responsible or liable party, ADEC may bill you at a later date for our expenditures associated with this pollution incident. Expenses for which we may seek reimbursement include: Staff time associated with general or technical assistance; work plan review; project oversight; general project management; legal services; interest; travel; equipment and supplies; and any contracting costs. Pursuant to Alaska Statute 46.08.075, the State may also file liens against all property owned by a person who is responsible or liable for State expenditures. Please respond in writing within thirty (30) days from the date of this letter addressing your intended actions with respect to this pollution incident. If you believe someone else is responsible for this pollution incident (e.g., a past owner or operation of the site) or if you have any questions concerning this matter, please contact Mr. Fred Vreeman at (907) 451-2181. The attached "ADEC Information Request" describes the minimum information expected in your response. Additional information may needed to evaluate the risks and responses required at each legacy well site. Sincerely, Fred Vreeman Environmental Program Manager G:\SPAR\CS\Contaminated Site Files (38)\320 National Petro Reserve Area\320.38.010 NPRA Legacy Wells General\2-2-2014 Letter\PRP Letter All Wells.docx Wayne Sveinoha Enclosure: 0 3 • ADEC Information Request Concerning Contaminated Sites BLM Legacy Wells Dispute letter date July 11, 2013 February 4, 2014 cc: Bud Cribley, Director, Bureau of Land Management Steven Cohn, Deputy Director, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Lynn Kent, Deputy Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, Alaska Department of Environmental Conservation Lori Aldrich, Program Manager, Alaska Department of Environmental Conservation Steve Bainbridge, Program Manager, Alaska Department of Environmental Conservation Jennifer Roberts, Program Manager, Alaska Department of Environmental Conservation ADEC Response Fund Administration GASPAR\CS\Contarr nmted Site Files (38)\320 National Petro Reserve Area\320.38.010 NPRA Legacy Wells General\2-2-2014 Letter\PRP Letter All Wells.docx 0 0 ADEC INFORMATION REQUEST Concerning a contaminated site(s) Re: Legacy Well Sites in and near the National Petroleum Reserve, Alaska (NPRA) Please precede each answer with the number of the question to which it corresponds. Please direct any questions concerning this information request to Fred Vreeman, Contaminated Sites Program, 610 University Avenue, Fairbanks, AK 99709; Phone: 907-451-2181. Thank you for your cooperation. 1. Provide name and company affiliation of the person answering the questionnaire. 2. Provide copies of all studies, reports, and supporting information (including preaquisition assessments and work done on behalf of other parties) which you have knowledge of which address past and/or present environmental conditions at the site. Identify the name, title, address, and phone number of the party(s) who are responsible for preparing the studies or information. Information which has been previously submitted to ADEC need not be submitted again (unless specifically requested in a subsequent communication) if you can provide the name of the office (and name and title of the DEC officer if known) to whom the report was previously provided. 3. Provide a description of any ongoing or planned investigations or cleanup work at the site. Identify the names, titles and phone numbers of the individuals responsible for preparing the studies or information. 4. Provide a description of known releases at the site (date of occurrence, quantity released, type of substance released, etc.) and a description of corrective measures that were taken. Provide information on any suspected releases which may have or are occurring. 5. Describe the nature of past and present operations at the site. In particular, any actions that may have caused the release or threat of release at the site. Describe the physical characteristics of the site including major structures, water wells, fuel or waste storage systems, drainage or septic systems, etc. 6. Provide a list of any permits issued by the Department which relate to activities at the site and a list of RCRA identification numbers (U.S. EPA identification numbers) which may be held. 7. Identify persons to whom you leased all or a portion of the property and describe the nature of their operations. 8. Identify the person(s) who used the site for disposal of substances deposited there, if any. 9. Provide copies of manifests for any hazardous waste and/or petroleum contaminated materials taken to or from the site. 10. Provide a list of persons and their phone numbers and addresses of persons who have knowledge about the use of hazardous substances at the site. 11. Provide information regarding the existence of insurance coverage for damages resulting from releases of hazardous substances and copies of all such insurance policies, both currently in effect and in effect during the periods of activity in question. 12. Describe the acts or omissions of any person, other than your employees, agents, or those persons with whom you had a contractual relationship, that may have caused the release or threat of release of hazardous substances at the site. a. In addition, describe all precautions that you took against foreseeable acts or omissions of any such third parties. 13. Describe the care you exercised with respect to the hazardous substances found at the site. 14. Describe the physical characteristics of the site including structures, wells, drainage systems, etc. THE STATE July 11, 2013 'ALASKA GOVERNOR SEAN PARNELL Wayne Svejnoha Supervisory Minerals & Energy Specialist 222 W 7th Avenue, #13 Anchorage, Alaska 99513 Re: BLM Legacy Wells Dispute Dear Mr. Svejnoha: Department of Environmental Conservation Division of Spill Prevention and Response Contaminated Sites Program 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.2155 The Alaska Department of Environmental Conservation (ADEC) — Contaminated Sites has reviewed the National Petroleum Reserve in Alaska: 2013 Legacy Wells Summary Report dated February 2013, containing updated information on the status of the 136 Legacy Wells located in the National Petroleum Reserve — Alaska (NPR -A), and the draft National Petroleum Reserve in Alaslm. 2013 Legacy Weiss Strategic Plan dated May 2013. ADEC has also reviewed the response by the Alaska Oil and Gas Conservation Commission (AOGC). We concur with the response by ACIGC and have no further comment regarding the priorities. We do have comments about the investigation and cleanup plans presented in the report. With this letter we arc outlining regulatory requirements related to the environmental work that is proposed and required as part of these cleanups. ADEC is concerned that the 2013 Legacy Wells Strategic Plan prepared by the BLM does not include either assessment of the contingency for assessment of known, likely, or unknown but possible contaminant releases. In addition, BLM plans for surface cleanup of these wells should be made clear in the plan. At least one of these legacy wells has extensive PCB contamination and has resulted in a multi-year cleanup totaling tens of millions of dollars. At others, solid waste disposal practices have resulted in releases to the environment with estimated cleanup costs in the hundreds of millions. Known releases documented in the records we reviewed include crude oil, gasses, refined oil and fuel, drilling fluids that include various organics, metals, and other chemicals, and unknown contaminants from drums and other containers observed to be damaged and abandoned at the various well sites. There are 13 legacy well sites with known releases currently on the DEC contaminated sites list. Many of these are in the process of being addressed, cleaned up, and closed. From our Waited records review there are 15 additional legacy well sites with confirmed releases. These should be prioritized for initial records reviews and then added to the BLM contaminated sites list under our cooperative agreement. Suspected releases include fuel releases from operations, storage, and fuel spills at the sites, impacts to various surface water bodies from spilled fluids during drilling and breaches of containment at reserve and flare pits, continued surface runoff from drilling fluids uncontained at several sites, and down -hole substances that were ejected from the holes over time or during blowouts or drilling operations. 1 Wayne Sve noha ? July 11, 2013 Y The.BLN-1 plan to address these known, suspected, and unknown releases at legacy well sites is notably absent from the documents presented to date. The three primary regulatory agencies that need to be involved in the plan are ADEC — Contaminated Sites, Alaska Oil & Gas Conservation Commission, and ADEC — EH/Solid Waste. Other agencies will need to be consulted. as well. Below we provide recommendations for a coordinated plan using the Uniform Federal Policy for Quality Assurance Project Plans (UFP-QAPP) that will involve all of the regulatory agencies in one coordinated manner. This will allow BLM to address these sites in a consistent and coordinated project which fulfills all of the regulatory requirements so that the sites do not need to be re -visited in the fu=e xvhen they are closed after this project. Attached are our comments on each specific well. The acronyms used on the list include terms that are typically used in a CERCLA type investigation however they are also suitable for investigations conducted under the State of Alaska cleanup rules. These include the following; Historical Records Review (HRR) 'chis is recommended for almost all of the well sites. Much of the information required for these reviews is already contained in various reports and appendices or in BLM files. The Historical Records Review should document the type of releases that might have occurred from drilling operations as well as historical use of the site, and should capture all available information on the drilling fluids used and any product produced or released. Preliminary Assessment (PA) This is recommended for almost all of the well sites. A Preliminary Assessment is a limited scope investigation that provides an assessment of information about a site and its surrounding area to distinguish between sites that pose little or no threat to human health or the environment and sites that require further investigation. The PA is a CERCLA defined document and typically does not require sampling. Site Inspection (SI) If the PA recommends further investigation, then an SI is necessary. The SI is a CERCLA defined document, and it is analogous to an initial report of contamination under state cleanup rules. On some legacy well drillings sites it is evident now that an Sl is required just from a review of the reports. An SI investigation typically includes the collection of samples to determine what contaminants are present at the site and whether they are being released into the environment. An approved site specific workplan is required under both CERCL-A and 18 AAC 75 prior to SI sampling. The SI typically is not intended to develop a full site characterization, but is limited to determining the presence or absence of a release. If contamination is found after completion of the HRR, PA, and SI then a RI/FS under CERCLA, or a Site Characte-rizatiowlteportandcleanup-Alas,under-l-fi-AAC7iis`required. -- ----- - -- — --------- - DEC recommends that BLM incorporate into the strategic pian the processes outlined in this letter. A team of agencies composed of AOGC, DEC -CS, EPA as required, and DEC -EH should address regulatory and technical requirements for these well closures. By cooperating and working together with the regulatory agencies BLM will save time and expense, and regulatory uncertainties will be avoided. The strategic plan should reference a project to prepare a generic workplan. DEC suggests that BLM utilize the generic UFP-QAPP workplan format for the required environmental work. If properly prepared, the workplan could encompass most of the investigations and cleanups required at these sites over multiple years. At other multi -site projects we have found this to be an effective way to reduce uncertainties and risk in these types of investigations. A very small site specific FSP could then be developed as BLM approaches each drilling site. Regulatory decisions made during workplan development would provide more certainty in the planning process for cleanups. G:\SPAR\CS\federal F2cilitie3\Ci%ih2n 1-cdcrrt Agr=ics\DOl\B[.nl\1'roiens\lxgAey Wells\7 11 13 Luter to KIN on lxbxy wells.doex Wayne Svejnoha 3 0 July 11, 2013 Please review the attached list of specific sites. If you have any questions, please do not hesitate to call me at 907-451-2181 or by email at fred.vreeman@alaska.gov. I look forward to working with you as the Federal Government fulfills its requirement to clean up these well drilling sites in Alaska. Sincerely, y' Fred Vreeman Environmental Program Manager Enclosure: SPAR Response with Legacy Wells cc: Bud Cribley, State Director, Bureau of Land Management Steven Cohn, Deputy State Director for Resources, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Cathy Foerster, Commissioner, Alaska Oil and Gas Conservation Commission Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, ADEC Division of Spill Prevention and Response Steve Bainbridge, Program Manager, ADEC Contaminated Sites Program Jennifer Roberts, Program Manager, ADEC Contaminated Sites Program GASI'AR\CS\Fedcrrl Fo61ibLy\Gvi6n Falctul AgcnnCs\DOI\BI.N1\Proitcts\lA'6.1' q W03\7 11 1314tur to Aim\I on Ug2cy Wclls.doex Well Name operator I RP I Land Simpson Core Test #5 1! Na 1 BLM Simpson Core Test #6 US Na I BLM Simpson Core Test #7 us Na 1 Bl. M Sin son Core Test 98 US Navy 113LM Si son Core Test #9 U5 Na I BLM Sinwson Core Test #1f) U.S Navy! BLM Core Test #11 AOGCC Subsurlaca I BLM Core Test #12 FUSNa a I BLM Core Test #16 a 18LM Core Test #17 US Na 1 BLM Core Test 018 US Na I BLM Core Test #19 US Na 1 BLM t Core Test #20 US Navy 1 BLM i Gore Test #21 2S Na 1 BLM I Core Test #22 US Na 111•LM I Core Test dnlf fluids left in hole i BLM Core Test �#2vy I BLhA n CareTest #25 US Na Y I BLM K Core #1 US Navy i BLM 1 -t- *1 SPAR Response with Legacy Wells Lisl.xlsx 2013 Risk Ity CSP Status I Fito tllHazid Rolea5e7 Nnne None IYOMWil Low RNooe ane Nona Unused, Unused. I None Unused, i None Uncased, None None None None (None Unknown Unknown Page 1 of 14 •I AOGCC Subsurlaca AOGCC Surface SPAR W arkgroup Notes Status Status Need HRR, PA, S1 no data no data Need HRR. PA. SI no data no data Need PA ind drill fluid assessnsenl & workplan drillin 11uids left in hole no data Need PA ind drill fluid assessment & work an drilling fluids left in hole no data Need PA incl drill Ifusd assessment & work Ian dnlf fluids left in hole no data Need PA nc drill fluid assessmcnf &work Ian dnllxs fluids left rn hale no data well skc-lch provided by Need PA ind drill fluid BLM not consistent with assessment & work Ian AOGCC or BLM data no data Need PA ind drill fluid assessment & work Ian dnflin fluids left in hole no data Need PA and 51 ind 13611 fluid assessment. workplan rid sampling stressed debfis, partially as blowout and fire rove elated site areas Need PA incl drill fluid assessment & workplan dn lling fluids left in hole no data geed PA ind drill fluid assessment & wOTk Ian drij I ing fluids teff in hole no data Need PA incl dfifl nutd assessment & work Ian drillin fluids left m holo no data Need PA incl drill fluid assessment & work Ian drillin ituids left in hole no data Need HRR. PA, SI no data no data Need PA incl drill fluid assessment & work Ian drillin fluids felt in hole ria data Need PA incl dnll fluid assessment & work larx drillin fluids left in hole no data Need PA incl drill fluid assessment & work Ian drillin fluids Teff in hole no data Need PA ind dnll fluid drflfing fluids and ball assessment & work len peen hammer left in hole no data overshot, drill collar, rock revegelated —131 Need HRR, PA bit, and N -reds left in hole can't find it Review Report as PA. No evidence of sheen, stressed veg, or drilling Not abandoned, waste on surface. Veg ----_— , ,raw,, plunaed to surface site not cleared •I SPAR Response with Legacy Wells LisLxlsx Page 2 of 14 is • vi nce o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP I Land Mgr Priority CSP Status file #IHazid Release? SPAR Workgroup Notes Status Status plugging operations inadequate and Wellhead tell as Umiat 43 US Navy I BLM I FUDS None pending dos 335.38.00113092 Yes. see file 'Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umiat #4 US Navy I BLM / FUDS None pending dos 335.38.001!3079 Yes, see file Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umial 98 US NaMy I BLM I FUDS None pendinq dos 335.38.001/3D81 'Yes, see_ _file Plugged BLM in 2004 incomplete historic sile? plugging operations inadequate and Wellhead left as Umiat #1'0 US Navyj BLM_I FUDS None pendingdos 335.38.00113082 Yes, see fila Plu ed by BLM in 2004 incomplete historic site? Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 7868'. Drilling Cleanup. Photos - evidence mud and diesel to Awuna #1 USGS I BLM Medium None None Yes of erosion into lake surface. > 100 _Pylons Need HRR, PA, SI with sampling. Drilling mud Wood , metal, assessment. Surface Plugged to 2039'. Diesel plastic debris. Fast Simpson #1 USGS I BLM Low None None Yes Cleanup. to surface. >10D Pylons Need HRR, PA, SI with Wood and metal Drilling mud assessment debris. Pylons - Photos straw areas of no Plugged to 2047'. Diesel Tankage for lk ' #1 USGS / 8LM Low None None Yes ve elation. to surface. flammable fluids Need HRR. PA, SI wdh sampling. Drilling mud assessment. Surface Plugged to 1400'. Drilling Wood and metal Koluktak #1 USGS I BLM Low None None LYes Cleanup. mud & diesel to surface debris Pylons Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 1894'. Diesel Wood and metal Ku am 91 USGS I BLM Low None None Unknown Cleanup. to surface debris. Pylons Need HRR, PA, Sl with sampling_ Drilling mud assessment_ Surface Plugged to 4464'. Drilling Wood & metal Kuyanak #1 USGS I BLM Low None None Yes Clean mud & diesel to surface debris. Pylons Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Photos show Plugged to 1840'. Diesel Plastic and metal Lisburne 41 USGS I BLM Low None None Yes stained soil to surface debris. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 8192'. Drilling Wood and metal North Iii ok $1 USGS I BLM Low None INone Yes Cleanup. mud & diesel to surface debris - Page 2 of 14 is • Well Name Peard South Meade #1 1 RP 1 Land 1BLM BLM #1 4USGS ! BLM SPAR Response with Legacy Wells Usl.xlsx ;013 Risk &W CSP Status File XlHazkl T Page 3 of 14 AOGCC Subsurface AOGCC Surface WAR Workgroup Notes Status r Status � deed HERR, PA SI with iampling. Dining mud rssessment- Surface ;leanup. Site photos show areas of stressed iegetalion. No issues Plugged to 2232'. Diesel Wood and metal soled in USGS re ort. to surface debris. Pylons Need HRR, PA, SI with sampling_ Drilling mud assessment Surface Plugged to 2026'. Diesel Wood and metal Cleanup. to surface debris. P Ions Add to She list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Od reported bubbling to the surface within reserve pit in 1982. Oily residue and sheen observed adjacent to east side of reserve pil, down hole material at the Plugged to 1875. Diesel Wood and metal surface to surface debris. P ons Add to Site list. Need HRR, PA, S) with sampl'uig. Drilling mud assessment - Surface Cleanup. Reserve pit berm had breaches anowirrg water to exit. Oil - stained sediment was observed above the Plugged to 1478'. Diesel Wood and metal waterline of the I. to surface debris. Site photos may show hydrocarbon sheen on Plugged to 2600'. Drilling Wood and metal water in well cellar mud & diesel to surface debris. Pylons Add to Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Berms have been breached an allow water to flow out of reserve piUllare pit. Rising bubbles of ail observed in Hare pit 1484. Photos Show Plugged to 1825'. Diesel Metal debris. ra.. v-1 v.nnnralinn to Surface ... 0 •I SPAR Response with Legacy Wells Lisl.xlsx Page 4 of 114 0 0 vi encs o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator 1 RP f Land Mgr Priority CSP Status File #fHazld Release? SPAR Workgroup Motes Status Status Need HRR, PA, Sl wrlh sampling. Drilling mud assessment Surface Cleanup. Breaches in bemi allow water to flow into and out of reserve pit, sheen on Plugged to 2700' Diesel Wood and metal West Dease #1 USGS l BLM Low Nona None Yes surface water in well cellar to surface debns. Pylons Add to Site list. Need HRR,. PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Water flows into the pits through breaches on the eastern berm and out of the pits through breaches on the northern and western berms. Downhole material Plugged to 228'9'. Drilling Wood and metal South Harrison Bay #1 USGS f BLAB Low None None es Present at surface mud & diesel to surface debris. Add to Site list. Need HRR, PA, SI with sampliing. Drilling mud assessment. Surface Cleanup. Stressed vegetation noted and apparent in site pholos. Plugged to 2443'. Drilling West Fish Creek #1 USGS 1 BLM Low None None Yes Drilling mud around well mud & diesel to surface Pylons Need HRR, PA, SI with sampling. Drilling mud assessment, Surface Cleanup. High TPH Plugged to 1977'_ Drilling wellhead sticking concentrations underneath mud under plugs. Diesel up. Wood debris. Fast Simpson #2 USGS 1 BLM I Low _ Active 300.38.10912691 Yes, see file the rig inundation to surface Pylons South Barrow 94 US NavyiNorth Slope Bono None None None Unknown Need Surface Status completed gas well - no data South Barrow #5 USAF - BLM Unknown None None None. Unknown Need Surface Status completed gas well no data South Barrow #& US Na /Norlh Sto Burg None None None Unknown Need HRR, PA, St no data no data South Barrow #9 US NavyfNarih Slop2 Boro None None None Unknown Need HRR, PA, Sl no data no data _ South Barrow #10 US Navyfflorlh Sto Bora None None None Unknown Need Surface Status com ted gas well no data South Barrow It12 US Na /North Slope Baro None None None Unknown Need HRR, PA. Sl no data no data BLM well skMh not consistent with AOGCC South Barrow #14 US NavyMorth Sloe Boro None None one Unknown Nsed HRR. PA, St data no data Need PA ind drill fluid well left filled with drilling South Barrow #16 US NavyiNotih Slope Bora None None None Unknown assessment & workplan mud and diesel no data Need PA incl drill !turd tubing in well. no perfs, Soulh Barrow 017 US Na /North Sloe 13ora None None None jUnknown assessment & work fan I unknown fluid, I no data Page 4 of 114 0 0 SPAR Response with Legacy Wells Lisl.xisx Page 5 of 14 •I E CYfuu .v v AOGCC Subsurface A Surlaco TEHILM T013 Risk CSP Stilus File #IHaaid Historic Rekeasa7 SFAR YUnrkgroup Nates 5latus at US $1<ntus Well Name flperatar f RP f Land Mgriority Unknown Need Surface Status corn feted as well no data 5aulh Barrow #18 US Na INorlh Slo a Bora None None None Unknown Need HRR, PA, St no data no data Walak a #1 USGS! Unknown None None None rsg 890`. Multiple cement plugs of unknown volume. Shallowest None None Unknown _ Need HRR, PA, SI SOD' no dada Gubik #1 US Na d Ur#cnown Low Add to Site list. Need HRR. PA. SI with sampling. csg Q SOD' Well blowout Drilling mud assessment. from zone al 1SOT during Surface Cleanup. Photos plugging operations show disturbed/ slashed Plugging never completed after blowout. no data Gub* #2 US Na ! Unknown Low None Nora es areas two downhole Dement plugs of unknown depth Mone None Unknown Need MR. PA. Sl and volume no data Grandstand #1 US Navy 1 Unknown None Add to Site list. Need HRR. PA, SI with sampling. Dnliing mud assessment. Surface Cleanup Sediment from the reserve pit was excavated and spread over the pad to drill a 2nd well at this location, Upon completion of the 2nd well. the sediment was pushed back into ft reserve pit.. Area does not appear to be revegetaling. perhaps from the presence property plugged but no of drilling mud at the data on abandonment None None Yes surface status no data W 7 Foran #1 " USGS I Unknown Low on Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Slressed vegetation, photos show plugged, but not open csg; metal & Active 306.3$.108f2689 Yes. see file site underwater abandoned at surface corwsele debris under 5' of water, Cape Halken #1 " US Na (Unknown Low None Unknown !Need HRR, PA. SI es to 27' open C_s Min a Veloei #1 U5 Na f t3LM one None csg @ 31" 280' of drill pipe, drill collar, and Core Unknown Need HRR. PA, SL barrel left rn hole. rove etaled Ournalik Core #i US Na / BLM None -No obsery None !None Page 5 of 14 •I E SPAR Response with Legacy Wells Lisi.xlsx Page 6 of 14 • • WI F3nCe Q BLM 2013 Risk Historic AOGCC Subsurface ADGCC Surface Well Name Operator t RP I Land Mgr Priority CSP Status File #IHazid Release? SPAR Workgroup Notes Status Status Need HRR, PA, Workplan for St with Sampling. Drilling Mud Assessment. Surface Cleanup. Photos show debris, stressed No csg. 15' of drift pipe Oumalik Caro #2 US Navy 1 ULM Low None None yes ve elation and rock hit left in hole. no data Need HRR, PA, Workplan for Si with Sampling open csg & other Drillip) Mud Assessment. piping sticking out Surface Cleanup_ Reports of ground; wood, of debris, drilling muds on melat, conciele Oumalik Core 011 US Navy 1 BLM Low None None Yes surface (__q to 9', debris open csg sticking out of ground; wood & metal 0umalik Core #12 US Navy I BLM Low None None No Need HRR, PA, SI no data —__—debris _„ debris buried by landslide. Need HRR, PA, St, Well not no dala on Sentinel Hill #1 US Navy 1 BLM Low None None Unknown ap panent in site Rholos Csq to 3t1'. underwater status Need IQR, PA, SI. No evidence of sheen, open crag slightly stressed veg, or drilling above ground waste on surface. Veg 37' of csg, drilling fluids level; wood and S imp son Core Test #1 US Navy 1 BLM Low None None No appears healthy lett in hole metal debris Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface_ Veg 76'01 Csg, drilling fluids Simpson Core Test #2 US Navy I BLM Low None None No appears healthy left in hate no data Need HRR, PA, Sl. No evidence of sheen, stressed veg, or drilling waste an surface. Veg 61' of csg, drilling fluids Sim sun Core Test #3 US Navy I BLM Low None None No appears healthy left in hole no data Need HRR, PA, St. No evidence of sheen, stressed veg, ordrilling waste on surface. Veg --60' of crag, drilling fluids Sim eson Core Test #4 US Nayy t BLM Low Norse None No apecars healthy left in hole no data Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface. Veg csg cemented @25% open csg sticking Songsoncore Test #13 US Na 1 BLM Low None None No appears health dritin fluids IeR in hole_ out of round Need HRR, PA, SI. Vegetated, no evidence of crag cemented @2D'; open csg sticking Simpson Core Test #14 US Navy ! BLM Low None None No release. drillin fluids left in hole out of ground Page 6 of 14 • • SPAR Response with Legacy Wells Lisl.xlsx ism son Core Fest #26 t=vrdence or Medium AOGCC Subsur(aen ADGGC Surface 13LM 2013 Risk CSP Status File WHazid Historic Retease7 SPAR Wwkgroup Notes Status Status Well Name operator r RP 1 Land Mgr Priority Unko Need HRR, PA. SL US Na ! $LM open casing None Nave Vegetated. no ev4dence of cog set shallow; drilling slicking nut of Low No release- fluids left in hole round Simpson Core Teri #14a US Na !BLM Low None None & weilhead slick Need HRR. PA, SI crude nil left in hole open casing Need HIR, PA, Workplan Vegetated, no e+wdence of csg cemented 12181; slicking out of openregd ng No release. drillingfluid left in hole round Simoson Care Tesl #15 US Na !BLM Low None None d wooden Oellar, Need HRR, PP, SL Sate a9 r�110'. dolling fluids wood 8 metal ism son Core Fest #26 US Na ! BLM Medium None None res Sim sen Core Test 027 US Na J 13LM IJone None None Unko Sim son Gore Test #28 US Na ! $LM Low None Nave Yes clmnnnn Core Tesl #29 US Navy! BLM Low Norte No No Simpson Core Test 030 US Na 1 !BLM Core Test #30a JUS,Navy 1 BLM Low None Prone n Gore Test #31 JUS Navy/ BLM None Page 7o(14 photos appear to show oil at surface, from a natural csg Q 350'. Completed in oil seep, seep, also drilling mud in oil well Open perfs. At 1welhead sticking sacks on the tundra one lime capable of up_ metal debris PI u ed b BLM in 2004. unassisled flow. and rustingbarrels 'Need HRR, PA, St. Site photos appear to show Oil csg cemented at surface, from a natural @i02;dnllutg fluids nn oily ground; csg seep- Plugged by BLM in including diesel and & weilhead slick vin 20014 crude nil left in hole out of ground Need HIR, PA, Workplan for Sl with Sampling- openregd ng ❑rilling Mud Assessment . out grouunnd in Surface Cleanup. Site d wooden Oellar, photos appear to show a p le of drilling mud about a9 r�110'. dolling fluids wood 8 metal 160 feel tram the welt tell in hole debris. Solid waste Need HRR, PA, Sl_ No evidence of sheen, stressed veg, or dri" waste on surface. Veg csg cemented at 1S2'; open csg. Wood a ears healthy dnknq fluids lett in hole and metal debris Need HRR, PA, SI. frilling mud at surface. but well is also in the middle of a large in oil seep; Open oil seep and surrounded by cog sticking up; pooled oil. Plugged by BLNI csg cemented A150'; wood & metal ser Holes in 20514- drillin fluids left in hole detail on oily ground; tog Need HRR. PA, Sl. Well is wellhead slick in the middle of a large oil seep and surrounded by csg cemented at 100% out of ground. pooled oil. Plugged by 131. dulling mud left in hole. wellhead leaking see noses in 2004 gas blowout at 423' gas Need HRR, PA, St. Leaky valve replaced in 2001, little evidence of contamination following valva on city ground; reg replacement- Plugged by csg cemented at 100'; & wellhead stick see notes BLM in 20174 iddifing fluids, left in hole out o1 round SPAR Response with Legacy Wells List.xlsx Page 8 of 14 • • yr enco o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator f RP f Land Mgr Priority CSP Status File glHasid Release? SPAR Workgroup Notes Status Status Need HRR PA, Workplan csg Cemente=d al for Sl with Sampling. 1028', cement plugs a1 Drilling Mud Assessment. 6387' and 5520'. Fish in Surface Cleanup. Drilling hole, drilling fluids Iefs in No data. Open Simpson Test Welt #1 ak US Navy1 BLM Low None INone yes muds near wellhead hale casing Need HRR, PA, Workplan for Sl with Sampling. Dolling Mud Assessment. Surface Cleanup Also Wellhead sticking evidence of a natural seep- above ground, Tar sheens in the summer ST from 2552 to 3018. wood, melel, and months. BLM is concerned csg @2915. Slotted liner concrete debris. Fish Creek #1 US Navy I BLM Medium None None Yes about exposure to wildlife to TO. Completed oil well Rusting barrels Need HRR, PA, Workplan for SI with Sampling. rasing cemented at 48; Drilling Mud Assessment. gas 0mv and explosion Surface Cleanup. Small gas while drilling at 863'; hole leak in wellhead flange, will Filled with fresh water to Wolf Creek 91 US Navy f BLM Low None Nano No flow if the valve iso en 330' No data. csg cemented a[ 53';hole left tilted with fresh water, Wolf Creek 02 US Navy 1 BLM Low Noire Nona No Need HRR. PA. Sl. fish in hole csg cemented at 107'; No data bridge plugs from 1447 to 1735 and from 554 to Wolf Creek #3 US Nayy I BLM Low None None No Meed HRR, PA, SI. 661, No data Add to Site list. Need HRR, PA, SI with sampling. csg slicking out of Drilling mud assessment ground with wood Surface Cleanup. Sheen on plug on top; solid surface water in well cellar, csg cemented at 30'; drill waste; wood hundreds of drums indicate pipe, drilling mud and debris; about 200 Skull Cliff Core iesl #1 US NaMy I BLM High None None Yes polential for cornlamrna[ion diesel left in hole nisling barrels Need HRR, PA, SI. Two open csg, wood drums are floating on a building; pylons; pond near the well. csg cemented at 1000', wood & metal Kaolak 01 US Navy 1 BLM t ow None jNone lNo Potential for hurried landfill. fdriltingluidsieftin hole debris Page 8 of 14 • • SPAR Response with Legacy Wells Lisl.xlsx 181-11119013 Risk Well Name Operator f RP ! land Mgr Priorlty CSP Status File 1NHazid #1 1 U Navy 19LM #1 JUS Navy/ umatik Ill US Na I BLM Low None None as[ Oumalik #i US Na !BLM Low None None #1 N East Topagoruk #1 USN l BLM Kniteblade #1 US Navy l BLM Page 9 of 14 Subsurface `AOGCC Surface SPAR Workgroup Notes Status Add to Site list. Need HRR, PA, SI with sampling. open flange Q Drilling mud assessment. Surface Cleanup. Drilling Gas well. Open ports. ground level. Mud pile overgrown with Drilling fluids and Metal & wood v , etallon and lichen tubulars lett in hole debris Need HRR, PA, SI. No evidence of sheen, stressed veg, or drilling csg cemented at 502'; open casing slicking out of waste on surface. Veg plug at 3470 to 3511'; ground. Wood appears heall drilling nuids left in hole debris. Open casing below Add to Site list. Need HRR, ground level. PA, SI with sampling- Revegetated. Drilling mud assessment. Numerous metal Surface Cleanup. Debris csg partially cemented at I support structures and drilling muds. Stressed 2762'. Plug at 2543% slicking up. vegetation Dridin mud left in hole Concrete debris, plate welded to pipe: l' of pipe rsg cemented at 1100'. sticking up - Need HRR. PA. SI. Drig fluids left in hole Wooden debris. Add to Site list. Need HRR, PA, SI with sampling. Driving mud assessment. open csg broken Surface Cleanup. Downhole material present csg cemented at 6073'. off and sticking up: at surface, area mostly original hole drilled to wood, metal, revegetated. Diesel still 7154'& junk len; concrete and other occupies the ground sidetrack hole left wilh debris. rusting dreulatioir lines. drillina fluids barrel Add to Site list. Need HRR, PA, SI with sampling. Dolling mud assessment. Surface Cleanup. Pile of tsg 10 1100'; pkig al open casing drilling muds is next to the 1049% drilling mud below sticking up. Wood, teller. No offical reserve pit plug: unknown fluids in metal, and glass noted o en hole debris. open casing Need HRR, PA, SI. BLM sticking up. Wood, stales that there was no metal, and glass debris at this site in 2012. csg cemented at 420% debris - •I 0 SPAR Response with Legacy Welts Lisl.xlsx Paye 10 of 14 0 0 w once a BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP f Land Mgr Priority CSP Status File #IHazid Release? SPAR Workgroup Notes Status v F Status open casing sticking up. Wood, metal, & concrete debris rusting Need NRR, PA, SI. Reports barrels. One indicate solid waste csg cemented to 45';fish marked flammable Knileblade #2 US Navy I BLM Low None None No drums in hole hazard. open casing slicking up; metal & Krideblade #2a US Navy 1 BLM Low None None No Need HRR, PA, SI. csq cemented at 38% concrete debris Need HRR, PA, SI including learning assessment. Site partially No wellhead. submerged intermittently csg cemented at 80; Metal. Solid waste North Simpson Test Wel 4 US N2n I BLM Low None None No during the summer dri0ing fluids left in hole ? No dala crude wellhead. Need HRR, PA, St. Surface csg cemented at 685'; Wood and metal Umiat 01 US Navy J BLM I FUDS Medium Cleanup co 335.38.00113090 Yes, see file Cleanup drillinq fluids left in bole debris No wellhead. Gravel pad partially csg cemented a1486; revegelaled wood Need HRR, PA, SI. Surface cement plug from 440 to debris and pipe Umiat #i t US Na I BLM I FURS Low pending dos 335.38.00113083 Yes, see file Clea 490'; sticking u csg cemented at 7206'; vVefNwad- Gravel various plugs from 8250' pad revegetaled 7 South Sirnpson 01 US Navy I BLM Low None None Yes Need HRR, PA, SI. to surface No data Add to Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Large quantifies of ferrous oxide, zinc oxide, zinc carbonate, and barium sulfate were added to drilling muds. Stains apparent in photos. BLM field camp an site. Walls between the reserve and Pare pits have eroded. Wellhead and Water flows into surface gravel pad. ? No Wook #1 USGS I BLM Low lNone Name Yes water during break22L no data data Paye 10 of 14 0 0 SPAR Response with Legacy Wells Lrsl.xlsx BLM 2x13 Risk Well Name 10porator I RP I Land Mgr Priority CSP Status I File #IHazid Arca- Barrow Cure #1 US Na l til.M Avak 01 US Navy I BLM Barrow Bi R' #1 US Na I BLM Barrow Cafe Rig Test 91 US Na I BLM #2 I US Navy I BLM #1JUS N,a I BLM H' h NOr1e None Test Well #1 US Test Well #2 US Barrow Test Wetl #31115 Na IN©r1h Slo c Bora IAedium None None Unknown Page 11 of 14 Subsurface -FAOGCC Surface SPAR IWorkgfoup Notes Status _ ___ araiu5 Need HRR, PA, SI. Surface Cleanup, Photo CIMG0218 csg cemented at 53` shows area of disturbed tubing hung to 708': hole open casing vegetation that should be heft filled with drilling mud slicking up; wood & investi algid durin Sf and diesel metal debris open casing Need HRR. PA, St. Surface csg cemeoled at BIF. sticking up; wood & Cleanu-. lu set at 1348' metal debris Not abandoned, site not cleared, Need HRR, PA, SI. Surface open easing 7? No Cleanup no data data Not abandoned, site not eteared, Need HRR. PA, SI. 'Surface open casing 77 No Cteanu no data data Need HRR, PA, St with sampling. trilling mud assessment. Surface Cleanup. Drilling Muds on Not abandoned, site -slowly revegelatmg site not igred, More information on drilling open casing 7? No mud specifics rs being researched no data data Need 1lRR, PA, SI wdh sampling. Drilling mud wellhead leaking assessment. Surface cemented Csg to gas!? Wood & Cleanup- Cellar does not 1270;slotted liner to metal debris. Area retain water 1956': tbg to 1939 affected 50'x50' Need HRR, PA. SI. Drilling Csg cemented at mud assessment. Surface 441'.hole Iell willed with open pipe; metal & Cleanup- On mads stem water concmie debris Need HRR, PA, Sl. Drilling Csg cemented al 2260'; mud assessment- Surface periorated liner to TD. wood, metal & Cleariu . fln road s stem lin Completed well. Conerete debris Need HRR, PA, SI with sampling and workplan. Drilling mud assessment. Surface Cleanup. Drilling +csg cemented at 10461: open c5g slinking mud at surface. Sheen on hole left filled with drilling up; wood & metal surface wafer in well cell larQuids and wafer. de" 0 SPAR Response with Legacy Wells Lisl.xlsx Well Flame Operator I RP I Land Mgr BLM 201$ Risk Priority CSP Status File #ltiazid yr once oF— Historic Release? SPAR Workgroup Notes AOGCC Subsurface Salus g AOGCC Surface Status no data. Likely revegetaled. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Oumalik Foundation Tess A US Navy I BLM None-uncased hc None None lUnknown Need HRR, PA. not in AOGCC database Monlht Meeting no data. Likely revegetated. Removed from our fist of wells of concern in < 50', no csg, no API#, October, 2012 Cumalik Foundalion Test b US Navy I BLM None-uncased hC None jNane Unknown Need HRR. PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed From our irsl of wells of Concern In < 50', no csg. no API#, October, 2012 Oumalik Foundation Test A US Navy I BLM None-uncased hc None lNone Unknown Need HRR. PA, not m AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no c5g. no APF#. Odubut. 2012 Oumalik Foundation Test A US Navy I BLM None-uncased ht Nune lNone Unknown Need HRR, PA, nal in AOGCC database Monthiv Meetin no data. Likely revegetaled. Removed from our Ilst of wells of con cam in < 501, no csg, no APi#. October, 2012 Oumatik Foundation Test 0 US NavyI BLM None-uncased hc None None Unknown Need HRR. PA, not in AOGCC database Moral Meeting no data. Likely revegetaled. Removed from our list of wells of concern in < 50', no csg. no API#, October, 2012 Ournalik Foundation Test 4US Navy I BLM None4xwased h_j None None Unknown I Need HRR. PA, not in AOGCC database Month Meetin Page 12 of 14 0 Page 13 of 14 SPAR Response with Legacy Wells LrsLxisx Well Name BLM 2013 Risk Operator f RP I Land Mgr Priority Historic CSP Status Fife #IHazld Rslease7 AOGCC subsurface Status �__ - -_-�� . A013CC Surface Status no dala. Likely SPAR 1Norkgroup Nates revegelaled. Removed from our list of wells of concern in < 50'. no csg, no AP IN, October, 2012 Oumalik Foundation Test US Na!q BLM None -encased h None None Unknown Need HRR. PA. not w AOGCC database MonthlyMeetin no data. Likely revegelated. Removed from our list of wells of concern in < 501. no csg, no API#, October, 2012 Oumalik Foundalion rest U5 Na I BLM None -encased h None None Unknown Need HRR, PA, not in AOGCC database Monihl lAeeli no data. Likely revegetaled. Removed from aur fist of wells of concern in 0urn alik Foundation Test US Na 18 LM None -encased fi None None ilnknown Need HRR. PA, < 50', no csg. no API#, not in AOGCC database October, 2012 Month! Meetin no data. Likely revegetated. Removed from our list of wells of concern In < 50', no csg, no API#, October, 2012 Oumalik Foundat'Gon Test US Na I BLM None encased h Nome None Unknown Need HRR, PA, not m AOGCC database Month! Meeting property abandoned per then -applicable South Banow #7 US NEILM 2LI None None Unknown Need HRR. PA, ro erl lu ed re s no data to support proper Um -Qt 02 US N Noire Pendin Clo 335.30.001/3078 Yes, see file Plu d to surface abandonment no data to support proper Uncal #5 Ummt #9 Urrval A66 Umial #T Atiaaru Point#1 U5 US US Na I BL M US Na I BLM USGS/BLM None Pendin Hi h -PCB cleanu Active None Pendia None tPendi Mane Clo 3L5 313.00113079 335.38.00113093 Cao 335.3$.00113080 Clo 335 38 001I3091 None Yes, see file Yes, see file Yes, see file Yes. see lite No Plu ed E4 surface property plugged and abandoned pfupedy plugged and abandoned property plugged and abandoned Need HRR. PA,Plugged by properly plugged and BLM in 2009. abandoned abandonment suriaoe site rcmediated surface site remediated suriacx V le remediated surface site re medialed Page 13 of 14 SPAR Response with Legacy Wells LrsLxlsx Page 14 of 14 0 vrcTon`ce o BLM 2813 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator i RP 1 Land Mgr Priority CSP Status File #fFlaxid Releases SPAR Workgroup Notes Status Status Add to Site list. Need HRR, PA. SI with workplan and sampling. Chilling mud assessment. Surface Cleanup. Two large breaches on the south side of the berm allow water out of the reserve pit. Plugged properly plugged and surface site Drew Point #1 USGS 1 BLM None None None Yes by BLM in 2410. abandoned remedialed On Site list Need HRR, PA, 51 with workplan and sampling. [frilling mud assessment. Surface Cleanup. In 1976 the reserve pit berm failed and dolling muds/cutlings were released onlo the Poe of Teshekpuk Lake. Plugged by BLM in 2008. Solid waste from camp aril drilling operations buried on northern portion of pad. Erosion has exposed solid properly plugged and surface site East Teshek uk #1 US Navy 1 BLM None Active - waits 3Q0.38.11012652 Ycs, see file waste. abandoned remediated Threatened by erosion. properly plugged and surface site J. W. Dalton $P USGS f BLM None None None No Plu ed b BLM in 20fl5. abandoned rernediated properly plugged and surface site South Barrow #8 USAF 1 BLM None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface sile South Bartow 911 US Na INorih Slope Bono None None None Unknown Need HRR, PA, abandoned remedialed properly plugged and surface site South Barrow 013 US Na lNerlh Slope Boro None None None Unknown Need HHR, PA, abandoned remedialed properly plugged and surface site South Barrow #15 US Na !North Sloe Boro None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #19 US Na 1Nrarlh Sloe Baro None Nana None Unknown Need HRR. PA, abandoned remediated Properly plugged and surface site South Barrow 1x20 US Na Worth Slope Bora None None None Unknown Need HRR, PA, abandoned remedialed Need HRR, PA, dolling mud assessment, containment assessment, possible releases. Breaches allow wafer to flow into and aul of property plugged and surface site Watakpa #2 USGSI BLM None None lNone lyes I reserve and flare pits. labandoned irernediated Page 14 of 14 0 UU--- k\l.� oa''/f ice* STATE La.� ,.2a f,',meLit cc 1J7;�. filr i 1.1e i a1. � �.�,;-t���_„_y: k of A C�uris va1LBI A S K A ye __ __ Division of Spill Prevention and Response Contaminated Sites Program '/ GOVERNOR SEAN PARNELL ®F •n t+ 610 University Ave. ALAS Fairbanks,Alaska 99709-3643 D Main:907.451.2181 �f B1ifom RPR'0 8 2011 Fax:907.451.2155 1�v� July 11, 2013 , Wayne Svejnoha Supervisory Minerals & Energy Specialist 222 W 7th Avenue, #13 Anchorage,Alaska 99513 Re: BLM Legacy Wells Dispute Dear Mr. Svejnoha: The Alaska Department of Environmental Conservation (ADEC) —Contaminated Sites has reviewed the National Petroleum Reserve in Alaska: 2013 Legacy Wells Summary Report dated February 2013, containing updated information on the status of the 136 Legacy Wells located in the National Petroleum Reserve— Alaska (NPR-A), and the draft National Petroleum Reserve in Alaska: 2013 Legacy Wells Strategic Plan dated May 2013. ADEC has also reviewed the response by the Alaska Oil and Gas Conservation Commission (AOGC). We concur with the response by AOGC and have no further comment regarding the priorities. We do have comments about the investigation and cleanup plans presented in the report. With this letter we are outlining regulatory requirements related to the environmental work that is proposed and required as part of these cleanups. ADEC is concerned that the 2013 Legacy Wells Strategic Plan prepared by the BLM does not include either assessment or the contingency for assessment of known,likely, or unknown but possible contaminant releases. In addition,BLM plans for surface cleanup of these wells should be made clear in the plan. At least one of these legacy wells has extensive PCB contamination and has resulted in a multi-year cleanup totaling tens of millions of dollars. At others, solid waste disposal practices have resulted in releases to the environment with estimated cleanup costs in the hundreds of millions. Known releases documented in the records we reviewed include crude oil,gasses,refined oil and fuel, drilling fluids that include various organics,metals,and other chemicals, and unknown contaminants from drums and other containers observed to be damaged and abandoned at the various well sites. There are 13 legacy well sites with known releases currently on the DEC contaminated sites list. Many of these are in the process of being addressed, cleaned up, and closed. From our limited records review there are 15 additional legacy well sites with confirmed releases. These should be prioritized for initial records reviews and then added to the BLM contaminated sites list under our cooperative agreement. Suspected releases include fuel releases from operations, storage, and fuel spills at the sites,impacts to various surface water bodies from spilled fluids during drilling and breaches of containment at reserve and flare pits,continued surface runoff from drilling fluids uncontained at several sites, and down-hole substances that were ejected from the holes over time or during blowouts or drilling operations. Wayne Svejnoha 2 July 11, 2013 The BLM plan to address these known, suspected, and unknown releases at legacy well sites is notably absent from the documents presented to date. The three primary regulatory agencies that need to be involved in the plan are ADEC —Contaminated Sites,Alaska Oil&Gas Conservation Commission, and ADEC —EH/Solid Waste. Other agencies will need to be consulted as well. Below we provide recommendations for a coordinated plan using the Uniform Federal Policy for Quality Assurance Project Plans (UFP-QAPP) that will involve all of the regulatory agencies in one coordinated manner. This will allow BLM to address these sites in a consistent and coordinated project which fulfills all of the regulatory requirements so that the sites do not need to be re-visited in the future when they are closed after this project. Attached are our comments on each specific well. The acronyms used on the list include terms that are typically used in a CERCLA type investigation however they are also suitable for investigations conducted under the State of Alaska cleanup rules. These include the following; Historical Records Review (HRR) This is recommended for almost all of the well sites. Much of the information required for these reviews is already contained in various reports and appendices or in BLM files. The Historical Records Review should document the type of releases that might have occurred from drilling operations as well as historical use of the site, and should capture all available information on the drilling fluids used and any product produced or released. Preliminary Assessment (PA) This is recommended for almost all of the well sites. A Preliminary Assessment is a limited scope investigation that provides an assessment of information about a site and its surrounding area to distinguish between sites that pose little or no threat to human health or the environment and sites that require further investigation. The PA is a CERCLA defined document and typically does not require sampling. Site Inspection (SI) If the PA recommends further investigation, then an SI is necessary. The SI is a CERCLA defined document, and it is analogous to an initial report of contamination under state cleanup rules. On some legacy well drillings sites it is evident now that an SI is required just from a review of the reports. An SI investigation typically includes the collection of samples to determine what contaminants are present at the site and whether they are being released into the environment. An approved site specific workplan is required under both CERCLA and 18 AAC 75 prior to SI sampling. The SI typically is not intended to develop a full site characterization, but is limited to determining the presence or absence of a release. If contamination is found after completion of the HRR,PA, and SI then a RI/FS under CERCLA, or a Site Characterization Report and cleanup plan under 18 AAC 75 is required. DEC recommends that BLM incorporate into the strategic plan the processes outlined in this letter. A team of agencies composed of AOGC,DEC-CS,EPA as required, and DEC-EH should address regulatory and technical requirements for these well closures. By cooperating and working together with the regulatory agencies BLM will save time and expense, and regulatory uncertainties will be avoided. The strategic plan should reference a project to prepare a generic workplan. DEC suggests that BLM utilize the generic UFP-QAPP workplan format for the required environmental work. If properly prepared,the workplan could encompass most of the investigations and cleanups required at these sites over multiple years. At other multi-site projects we have found this to be an effective way to reduce uncertainties and risk in these types of investigations. A very small site specific FSP could then be developed as BLM approaches each drilling site. Regulatory decisions made during workplan development would provide more certainty in the planning process for cleanups. !:•�enAR\re\FP.i...,l F,,.;I:t \rhrir,n FvA P.,1 Acre ,ripe\nnT\BT.M\Proiects\Leeacv Wells\7 11 13 Letter to BLM on Legacy Wells.docx Wayne Svejnoha 3 July 11, 2013 Please review the attached list of specific sites. if you have any questions, please do not hesitate to call me at 907-451-2181 or by email at fred.vreeman@alaska.gov. I look forward to working with you as the Federal Government fulfills its requirement to clean up these well drilling sites in Alaska. Sincerely, Fred Vreeman Environmental Program Manager Enclosure: SPAR Response with Legacy Wells cc: Bud Cribley, State Director,Bureau of Land Management Steven Cohn, Deputy State Director for Resources, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer,Bureau of Land Management Cathy Foerster, Commissioner, Alaska Oil and Gas Conservation Commission Larry Hartig, Commissioner,Alaska Department of Environmental Conservation Kristen Ryan, Director,ADEC Division of Spill Prevention and Response Steve Bainbridge, Program Manager,ADEC Contaminated Sites Program Jennifer Roberts, Program Manager,ADEC Contaminated Sites Program G:\SPAR\CS\Federal Facilities\Civilian Federal Agencies\DOI\BLM\Projects\Legacy Wells\7 11 13 Letter to BLM on Legacy Wells.docx I 2 u m CO > Q 'C N a) E R y -o 0 CO CO a) = -0 a) VN N W CO W CO lO CO CO C, CO CO CO CO CO CO CO CO @ CO C N 1.-.) 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N 0 0 0 0 0 0 ++ d C C C C C C 1� I/) T) N NY Y Y Y Y Y N v = C >- >o- 0 D 0 D D D D a) v m m N a) LO O J (p V L 'O (N.1 61 O a) m = N o 0 Cl) a) a) a) a) a) a) a) O d C) C 0 0 0 0 0 0 C a) Z c Z Z Z Z Z Z Z Z fY N co Q w 3 CL N a) V a) •i C C C C C C C C Q Z Z Z Z Z 2: 2: Z Y N_ )Y M a N o C G C C a) C C a) C an d Z Z Z Z Z Z Z Z Z Z QI _ O o O O O CO m m COm C a a c. a O. L6 o o o o o J m u) m u) 1 2 L L L L L m 2 2 0 O O O O ,. ..-1 co J Z Z Z Z Z -J y`co co Z co Q CO Z CO Z Z o O. O > CO D CO > j CO CO D U) CO ; 1- a7 U) O) 0 00 N ,_ C9k k ik �k 4k *k a w m Z. y C t o o t o t CV C .0 L .. Z CL aN) a m m m m m a3 a 3 C L L L L .0 ca m `) CO > > > > > > co 3 a co -i COO COO CO Cl)) • • < <~ ". Well Ranking Before identifying the risks associated with the legacy wells, the BLM reviewed the list of wells to determine ownership and well status. Abreak-down of the 136 is as follows: • 39 are uncased core holes that did not penetrate oil and gas zone, have naturally collapsed, and have blended harmlessly into the landscape. • 33 were either transferred to the North Slope Borough through the Barrow Gas Field Act of 1984 or were conveyed to Arctic Slope Regional Corporation. • 20 wells are being used to by the United States Geological Survey (USGS) for climatic temperature and peiniafrost studies (see Appendix B). • 7 wells are plugged (6 at Umiat, Squv-e Lake # 1). • 37 wells that require further evaluation. Following the 2003 field season, members of the legacy well team met to determine criteria for evaluating the risks associated with the above mentioned 37 wells and ranking each well based on these risks. For consistency purposes, the group devised a series of questions to assist in the process: • What is the condition of the existing pad and pits? (e.g. any indication of contamination?) • Is there any solid waste (old equipment, piping, barrels, etc.) or potential hazardous material conditions? • Did the hole penetrate known oil or gas stratigraphy? • Did the well have oil or gas shows, and if so, is the well capable of flowing? • Is the well near human activity, and if so are there conditions present that pose a risk to people? • What is the condition of the wellhead? Have there been any previous problems or repair work? Does the well (in its current condition) pose a risk? • What is the surficial condition of the existing pad and pits? Is contamination a possibility? • Does the presence of unplugged wells have the potential to negatively impact anticipated development? Each of the 37 wells are described in the following pages. Descriptions are ordered in terms of the ranked priority based on the above stated criteria and the concerns identified. Umiat Wells The early Navy wells in Umiat rank at the top of the list. Umiat is located on the north bank of the Colville River 60 miles upstream from the village of Nuigsut. Natural oil seeps were discovered at Umiat by early explorers. This discovery, along with the detection of seeps at Cape Simpson, motivated the U.S. Navy to conduct a drilling program. Umiat and the Simpson Peninsula were the primary exploration targets in the mid to late 1940s. The Umiat seeps are still visible today. Their locations tend to shift over time. The seeps are currently active in Umiat Lake, just off the northeast portion of the airstrip and in a channel of the Colville River. <~\V 22 \~~ • • The 11 Umiat wells were drilled from 1945 to 1952. These wells are a concern for BLM due to their close proximity to human activity. Umiat is not a village, but serves as a camp for seismic crews: Umiat is also the primary hub for recreational activities in eastern NPR-A and western CAMA (Central Arctic Management Area). It has one of the few airstrips on the North Slope maintained year-round and is a popular location for purchasing aircraft fuel (Figure 10). The Unuat wells all lie within 2 miles of the camp, with the exception of Umiat # 1, which is approximately 5 miles to the northwest. After the U. S. Navy completed drilling operations in 1952, the U.S. Air Force assumed custodial responsibility at Umiat and established the 8,000-acre Umiat Air Force Station. In Tune of aircraft. 1955 the Air Force returned the facility to the U.S. Navy. Since Umiat is a Formerly Used Defense Site (FUDS), the U.S. Army Corp of Engineers (COE) is responsible for the reduction of risk associated with surficial hazardous, toxic, and radioactive waste. The COE has conducted extensive surface investigations in the area and has identified contaminants at several locations. Varying levels of barium, petroleum, pesticides, and polychlorinated biphenyl (PCB) were identified at the wellsites, the landfill, and the nearby slough (U.S. Army COE, 2003). Contamination levels were compared to the Alaska Department of Environmental cleanup standards and were used as a screening level. The COE has conducted site remediation at two well locations, Umiat #2 and #5 (Figure 11), and has plans to continue the surface clean up. To facilitate site remediation, the COE plugged wells #2 and #5 in 2002, but plugging the remainder of the wells is the responsibility of the BLM. Four wells were plugged by the BLM in the Winter/Spring of 2004. After the removal of wellheads #2 and #5, the State of Alaska Historic Preservation Office asked the BLM to leave all existing surface objects (wellheads, tanks, pipes) onsite and intact, because of their potential Figure 11: Umiat #2 and #5 prior to removal and historic value. The Alaska Heritage remediation. Photo taken August 2001. Resources Survey (AHRS) included the Umiat wells in an inventory of all reported historic and prehistoric sites within the State of Alaska. This inventory of cultural resources includes objects, structures, buildings, sites, districts, and travel routes generally more than 50 years old. Therefore, the wellheads for the other Umiat wells will be left in place after plugging is completed. 23 ~1 Umiat #9 Umiat #9 was spudded in June 1951 and completed seven months later in January 1952. The well is cased to a depth of 1,257 feet. The purpose of the well was to determine the western extent of the producing field. It was also the first hole in which oil-based muds were used in the Umiat area. Umiat #9 is located about half mile to the north-northwest of the Seabee pad. The drill hole penetrated several known oil and gas formations; Ninuluk, Chandler, Grandstand and Topagoruk. Hydrocarbon shows were prevalent within both the Grandstand and the Topagoruk formations. Multiple sands were perforated and tested. Production exceeded 217 barrels per day, thus seemingly showing the benefit of using an oil-based mud. However, the muds did not allow the different formations to be distinguished. Cement was used in an attempt to "plug back" and isolate individual formations. Samples were taken and sent to a Bureau of Mines lab where the chemical tracer (used during chilling) was measured and the various sandstone samples were examined. This allowed a study of the different lithologies be conducted. The tracer Aroclor used in the well has raised concerns about PCB contanunation. However, the well was allowed to flow for seven weeks at 200 barrels per day (Robinson and Bergquist, 1956) prior to shutting it in, possibly purging the potential contaminants. As it stands today, insufficient energy exists in the reservoir for the well to flow to surface and the wellhead has no pressure on it. The well is located within the Northeast planning boundary (see Map 2) on lease AA- 081726. There is some potential for future development to occur in the area within the next 20 years and the well has the potential to leak to surface if development occurs and may adversely affect future development. Surficial wastes around Umiat #9 could present an issue. As was common with early Navy drilling, a gravel pad was not created. Wooden debris exists around the wellhead and there is a pile of drilling muds directly to the north which is void of vegetation (Figure 12). Samples taken by the COE from around the wellhead detected elevated levels of diesel range organics (DRO), residual range organics (RRO) and PCBs (U.S. Army COE, 2003). 24 Figure 12: Aerial view of Umiat #9. • The wellhead is equipped with two bull plugs, a flange and a 2 '/-inch nipple. There are no fresh water aquifers in the area, but due to potential contaminants downhole and existing contarinants on the surface, the well does pose a risk to human health and the environment in its cun•ent condition. Umiat #6 Umiat #6 was spudded August 1950 to test the southern limits of the Umiat anticline. The hole was drilled to a depth of 825 feet. The well was cased to 35 feet and a 42-foot cement plug was placed on the bottom of the well in order to stop water influx fioin sands at the base of the permafrost. The well encountered very poor shows in the Killik Tongue (Chandler Formation) and a productive sand in the upper Grandstand Formation. Oil recovered in open-hole pumping tests was produced at rates averaging 53 barrels of oil per day. Insufficient energy exists in the reservoir for the well to flow to surface and there are no fresh water aquifers present. Major caving of the hole occurred and the well was backfilled with mud (Robinson and Bergquist, 1956). The well is located within the Northeast planning boundary (see Map 2) on lease AA- 081726. There is some potential for future development to occur in the area within the next 20 years and the well has the potential to leak to surface if development occurs and may adversely affect future development. The well lies about 500 feet to the northwest of a gravel spur road which connects the Colville River to the eastern edge of the Umiat airstrip. The well is located in wet tundra adjacent to an empty 55-gallon drum. The well is left open with 8 5/8-inch casing to the surface. It has no gauges, valves or a cover plate. Two thermistor protrude to the surface and rests on the lip of the casing. This well poses no threat to human health or the environment unless development occurs. Umiat #7 Umiat #7 was drilled in 1951 to a depth of 1,384 feet, cased to 1,196 feet and completed as a dry ~ ~ hole. It was the southern most well drilled on the - ~y- Umiat anticline. The ¢ objective was to further delineate the southern extent of the producing Figure 13: Umiat #7 summer and winter photos. field. The well encountered residual hydrocarbons in the Chandler and Grandstand formations. Oil recovered in bailing tests was so minute that it was measured in gallons. The small amount of crude recovered in each test is indicative of residual oil staining. The sands encountered in Grandstand are downdip of the productive reservoir and are water bearing. Minor gas shows were encountered at 260 feet (Robinson and Bergquist, 1956). The well is located within the Northeast planning boundary (see Map 2) on lease AA- 081726. There is some potential for future development to occur in the area within the 25 • • next 20 years but since the well is located below the oil/water contact it has less potential to be adversely affected or affect future development. The wellhead assembly consists of 7-inch casing (with collar) clamped inside 11 3/-inch casing at a total height of 30 inches (Figure 13). Surrounding the open hole is wet tundra with no indication of remaining debris or other surficial issues. The hole poses no threat to humans or the environment. The well location is currently situated on Alaska Dept. of Transportation land that was transferred in 1966, but the well remains the property of the BLM. Additional U~niat Work Umiat has been a site of recent cleanup projects. The cleanup process began in 1994 with the removal of about 1,000 drums, some containing petroleum and transformer oil with PCBs, from the main gravel pad. Another 200 cubic yards of PCB-contaminated soil was removed in 1998 along with 60 cubic yards of lead-contaminated soils. In 2001, 50 cubic yards of PCB soil was excavated with an additional 10 cubic yards removed the following year by the Corps of Engineers (U.S. COE, 2003). J.W. Dalton #1 J.W. Dalton #1 was drilled in 1979 to a depth of 9,367 feet. It is cased down to 8,898 feet and plugged back to 1,530 feet. (Husky Oil NPR Operations for U.S. Geological Survey-J.W. Dalton, 1982). The primary objective of the well was to determine if hydrocarbons were present within the Sadlerochit and Lisburne Groups. Gas shows were encountered in trace amounts in the Ivishak Formation, and the Lisburne and Endicott Group. Poor to good oil shows were discovered in the Ivishak Formation and in the Lisburne Group. A drillstem test of the Lisburne Group recovered 22 barrels of oily water (Gyrc, 1988). This well has been a USGS monitor well since its completion in 1979. Approximately 230 barrels of diesel fuel were placed downhole to act as a neutral medium for collecting wellbore temperatures. In the summer of 2004, warmer temperatures, wind, and wave action eroded 200 feet of the coastline adjacent to the well (Figures 14, 15). This erosion placed the J.W. Dalton #1 well and reserve pit precariously close 26 Figure 14: Photo of J.W. Dalton taken October 26, 2004. Soil cracking is occurring around the wellhead and the north and east side of the cellar is exposed. Figure 15: J.W. Dalton wellhead with pilings. Photo was taken August 2000. • to the edge of the Arctic Ocean. As a result, casing is now exposed to a depth of 15 feet on the present day beach (Figure 16). The top of the diesel is approximately 60 feet below the present beach level. The reserve pit has been breached on the northwest coiner from the advancing shoreline (Figure 17). The pit is known to contain chromium, cobalt, zinc, and barium. However, chromium, cobalt and zinc were detected in background levels, due to the east-west water movement into and out of the pit. Barium is a constituent of the drilling muds and is consolidated with other sediments (U.S. Bureau of Land Management, U.S. Geological Survey, 1992). The well is located within the Northeast planning area (see Map 2), on a tract currently closed to leasing. In its current condition, the well does not pose a threat to humans or the environment, but if the casing were to break in its exposed condition, the diesel fuel would, over time, leak into the ocean. The release of heavy metals from the reserve pit may pose an immediate risk to human health and the environment. The pit was sampled October 26, 2004, and results are pending. 27 Figure 16: J.W. Dalton with exposed conductor (left), and rat hole (right). The mouse hole (not pictured) is completely exposed. ~ • Figure 18: Simpson Peninsula showing well locations. Simpson Core Test #26 Simpson Core Test #26 was drilled in the middle of one of the larger, active oil seeps in NPR-A (Figure 19). The Navy described this location as Seep 3. The hole reached a total depth of 1,171 feet and was cased to 350 feet. The well encountered one very poor gas show and one productive oil sand in the Ninuluk/Seabee undifferentiated formation. In production tests, the well flowed at rates averaging 110 barrels of oil per day (Robinson and Brewer, 1964). Other formations encountered include the Gubik, Seabee, and Grandstand Formations. Gas bubbles have been observed around the base of the casing since the 2000 field season. Bob Burruss of the USGS, sampled and analyzed gas from Simpson Core #27 which is part of the same oil field, located less than half mile to the east. His findings showed the gas to be biogenic methane indicating that microbial alteration (breakdowns) of the hydrocarbons has generated the gas. Additionally, oil sampled in the well was extremely biodegraded. Simpson Figure 19: The wellhead is located in the center of Core #26 has a wellhead flanged to the the photo. The green color liquid defines the area of active seepage. The orange color is oil-eating casing, a 2-inch line pipe, and four bacteria. wing valves and will likely flow oil if 28 ~ ~ the valves are opened. Access to the wellhead is limited by the depth of oily-water surrounding its base (Figure 20). There are no concerns with contaminating fresh water aquifers if the well is left unplugged, but the well could potentially flow oil and cause damage to surface resources if the well equipment corrodes or, through human intervention, the well is opened or damaged. The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased, receiving a high bid of $7.51 per acre during the NW NPR-A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. The area around the wellhead looks to have been bulldozed in an attempt to collect the seeping Figure 20: Simpson Core #26 drilled in the middle of an oil. The scraped-up earth waS oil seep. Depth of the oily-water prohibits access to the then used to build berms around wellhead. the depression. Light amounts of trash appear to have been buried in these berms. The Navy cleaned up the site in the late 70s, removing most of the drums and other debris, but solid wastes, including half barrels and other drums can be found in the wet tar that fills the depression. Simpson Core Test #31 29 i ~ psi. The well also penetrated the Gubik and Seabee Formations, which were unproductive (Robinson and Brewer, 1964). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR-A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. A drilling pad does not exist as the well was drilled in an active oil seep, which remains active today (Figure 21). The Simpson Peninsula contains few permanent settlements, but a multitude of sununer camps. The well had been a source of fuel for the inhabitants as evidenced by a 10-foot extension pipe hooked up to the wing valve. The extension allowed for the oil to flow down the pipe and collect in a bucket. In 2000, BLM learned that oil was seeping out of a corroded swedge on the wellhead. The potential hai-n1 was mitigated by the fact oil was seeping into a natural oil seep. In June 2001, BLM spent $35,000 to remove the old wellhead and install a new master valve and needle valve. Oil and gas samples were taken by the USGS prior to the replacement. There are no fresh water aquifers in the well so there are no risks to sub-surface resources but there are risks to surface resources if the well is left unplugged. Oil will flow to surface if the wellhead or casing corrodes or if the well is left open. There are no solid wastes or hazardous materials (besides the natural oil) that would present a concern or pose a risk to the health and safety of the land and people. Simpson Core Test #30A Simpson Core Test #30A is an oil well drilled in 1951 to a depth of 693 feet and cased to 152 feet. The well encountered some very poor gas shows and one productive sand in the Ninuluk/Seabee undifferentiated formation. The well was bailed and averaged oil rates of 6 barrels per day during bailing tests (Robinson and Brewer, 1964). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR-A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. The wellhead consists of casing swedge, a nipple, and a brass gate valve and will flow oil to surface if the valve is opened. There are no sub-surface fresh water aquifers at risk. However, if the well is left unplugged it could pose a risk to surface resources. In its cwrent state, oil could flow to surface if the well is damaged, corroded, or the valves are opened. Additionally, concerns have been raised regarding the bubbling around the base of the casing. When the valve is opened, the bubbling subsides. This indicates a small leak around the base of the casing or through a hole in the casing. The gas was sampled by the USGS and has been identified as reservoir-produced biogenic gas. While the well does pose a risk, it is mitigated by the fact that the well is drilled in an active, natural oil seep. 30 Simpson Core Test #30 Simpson Core Tests #30 and #30A were drilled about 100 feet apart in the same oil seep. The seep is part of the same regime that contains Cores #26 and #27. These wells were drilled to gain an understanding of the producing field limits and to help determine underlying structure. Simpson Core #30 is an oil well drilled in 1951 to a depth of 1,500 feet. No plugs were set and the well was cased to 102 ft. The hole encountered the same formations as Cores #26 and #27; Gubik, Seabee, undifferentiated Ninuluk/Seabee, and the Grandstand with a few poor gas shows and one productive sand in the Ninuluk/Seabee undifferentiated formation. Poor oil shows were also noted in the deeper Grandstand Formation. During production tests of the shallow oil sand the well was bailed at rates averaging 5 barrels of oil per day (Robinson and Brewer, 1964). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR-A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. The well was left with sheared, open casing above ground. Even though the well produced oil 50 years ago, it is static today. This suggests the hole has collapsed below the shallow casing. There are no fresh water aquifers in the well, however, since the well was drilled to a reservoir with sufficient energy to flow oil to surface, the well should probably be considered a risk if left unplugged. This well would probably be plugged by placing a 100 foot surface plug downhole to eliminate risks to surface resources. The potential risk is alleviated by the fact that the well is drilled in an active, natural oil seep. There is no drill pad as the Navy drilled within the seep and camped on the tundra. Some light trash is present in the seep between the Core #30 and Core #30A, which may prove difficult to clean (Figure 22). The well lies three tenths of a mile from both Core #26 and #27 (Figure 18). Simpson Core Test #27 Simpson Core Test #27 is an oil well that was spudded February 1951 and completed one month later. Total depth of the well is 1,500 feet, with casing down to 102 feet. Oil was encountered at a depth of 380 feet and was bailed at a rate of 3 barrels per day. The core test encountered the same formations as Simpson Core Test #26, with a few very poor gas shows and one productive oil bearing sand in the Ninuluk/Seabee undifferentiated formation. Oil-based muds were used from the drilling depth of 325 to 661 feet. At that point the oil was displaced and the drilling crew resumed using water based muds. 31 Nigure 22: Light trash is present in the seep between Cores #30 and #30A. C~ Additional crude was added downhole at a depth of 1,320 feet. The drill pipe was stuck and the two front derrick legs collapsed below the four-foot extension in an effort to free the pipe. The drilling muds in place were re-circulated during the repair process. In an attempt to free the pipe, 73 barrels of crude and 23 barrels of diesel were used to replace the muds and the pipe was worked free. The oil was gradually replaced by mud as the drilling continued, however, some oil remained in the hole after completion. The crude used downhole came from Simpson Core Test #26 (Robinson and Brewer, 1964). There are no fresh water aquifers in the well so there are no risks to sub-surface resources but there are risks to surface resources if the well is left unplugged. Oil could flow to surface if the well equipment corrodes, the well is damaged, or left open. This potential risk is mitigated by the fact that the well is drilled in an inactive, natural oil seep. The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR-A lease sale of 2004. Exploration and development. is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. There is no existing pad. The wellhead consists of 8 5/8-inch casing, a flange and a brass gate valve. The casing was set in a small inactive oil seep. It will flow oil to surface if opened. There is no surface debris present at Core #27 (Figure 23). The well poses little threat to human health and the immediate environment around it in its current condition. Simpson Core Test #29 Simpson Core Test #29 is a dry hole drilled in 1950 to a depth of 700 feet and cased to 152 feet. The purpose of the well was to determine the limits of the producing field encountered at Core #26. A very poor oil show was identified in the Seabee Formation. The productive sand present in the other Simpson Cores does not exist in this well. The test hole also penetrated the Gubik and Grandstand Formations. No oil was recovered from this well (Robinson and Brewer, 1964). The well is grouped higher on the priority list due to its close approximation to Simpson Cores #26, #27, #30 and #30A (Figure 18). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR-A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development if left unplugged since any development will likely target deeper, more productive formations. The well was left with 8 1/2-inch casing, open to the atmosphere at a height of 6 inches. Thermistor cables protrude from the casing. It is located in a four-by-four foot wooden 32 Figure 23: There is no surface debris present at Simpson Core #27. cellar filled with water. A drilling pad was never established. There is some light trash around the wellhead including drill pipe, and various sized wooden scraps. A small barrel pump and other small debris can be seen in the casing and within the cellar (Figure 24). This well poses no threat to the human population or the environment. Umiat #1 n Umiat #l was spud in 1945, and completed in 1946. Total depth reached was 6,005 feet and the well was cased to 685 feet. The well encountered residual hydrocarbons and a few poor gas shows in the Seabee, Ninuluk, Chandler, Grandstand, and Topagoruk Formations. The sands of the Grandstand were outside the productive area encountered by other Umiat wells, which are located five miles to the east. Oil recovered in bailing tests was so minute that it was measured in pints and officially recorded as a trace. Lab tests determined the oil to be of a different type of crude oil than that found in the productive Umiat wells (Robinson and Bergquist, 1956). The small amount of crude recovered in each test is indicative of residual oil staining. No fresh water aquifers exist in the Umiat area, so this well poses no tlueat to sub-surface water resources. There is no pressure on the wellhead and it is fitted with a blind plate, a 2-inch nipple and a brass gate valve (Figure 25). The well is located on an unleased tract at the crest of a hill that divides the north and south forks of Seabee Creek. Future development is unlikely because of its location outside the Umiat structure. Left unplugged, the well poses no threat to the environment and has no potential to adversely affect future development. The surficial landscape is dominated by willows with the exception of three piles of drilling muds that are located to the east and north of the wellhead. Vegetation is absent on the slick, clay- type material. The COE tested the piles and found them to be contaminated with barium, Figure 25: Umiat #1 is located about 5 which is not surprising given that barite is a miles from the Umiat airstrip. COmmori drilling fluid component. Through sampling, the COE determined the barium has not migrated down the hill and poses no danger to the Seabee Creek drainage (Ecology and Environment, 1999). There is no 33 Figure 24: Simpson Core #29 A indication of stressed vegetation down-gradient from the drill muds. Additionally, solid waste in the foam of steel framing and scrap metal are near the wellhead. The solid wastes pose no threat but are unsightly. Umiat #11 Umiat #11 was spud June 1952 and completed two months later. The well reached a total depth of 3,303 feet with 486 feet cased. One cement plug was placed at 440 feet. The objective was to test production possibilities of the Grandstand Formation on a fault that parallels the Umiat anticline. The well encountered residual hydrocarbons in the Seabee, Ninuluk, and Grandstand Formations but no oil or gas was recovered during production tests. The sands of the Grandstand were outside the productive area encountered by other Umiat wells, which are over one mile to the south. The well is located within the Northeast planning boundary (see Map 2). The tract is located on lease AA-084141 but there is little possibility of the well interfering with future development due to its location outside the Umiat structure. The well was drilled in the alluvial plain of Bearpaw Creek, 0.6 miles from Umiat #8. A drilling pad was never created as operations consisted of mounting the drill rig on a sled and then placing it on top of large timbers that were secured to pilings (Robinson and Bergquist, 1956). A pile of unvegetated drilling muds is present 30 feet west of the wellhead in between the wellhead and the creek. The wellhead consists of a 10 3/-inch open-ended casing with a collar sticking up inside a 30-inch conductor that is filled with water. Minor wood debris can be found around the wellhead. The well poses no risk if left unplugged. Wolf Creek Area Three test wells were drilled in the Wolf Creek area. The wells were drilled in the early 1950s with the intent of testing the northwest-trending Wolf Creek anticline structure. Wolf Creek # 1 and #3 (Figure 26) are located at the crest of a hill with about 250 feet of relief from the valley. Wolf Creek #2 is located about one and one- third miles north within the Wolf Creek valley. Wolf Creek #2 and #3 are open holes but Wolf Creek #1 is equipped with a wellhead. Wolf Creek #1 Wolf Creek #1 is a gas well drilled in 1951 to 1,500 feet and cased to 48 feet. The well encountered very poor gas shows in the Killik Tongue and productive sands in the Grandstand Formation. The well produced at rates up to 881 MCFPD in open hole tests 34 Figure 26: Wolf Creek #1 after adding a new ball valve to the wellhead. August 2004. of the Grandstand. The well is equipped with a blind plate, a 2-inch nipple and a brass gate valve (Figure 26). There is a small gas leak in the threaded wellhead flange and, if the valve is opened, the well will flow about 10 MCFPD but the pressure is so low it does not register on a gauge. In its current condition, the well does not appear to pose a risk to surface or sub- surface resources. The drill pad is shared with Wolf Creek #3. Tluoughout the pad, there are some wooden pilings, metal anchors and scrap metal. The scraps should not be considered hazardous in this remote region. The leaking gas is of minor concern, however given the weak gas pressure and remote location; the overall risk is very minimal. Wolf Creek #2 Wolf Creek #2 is a dry hole. The well was drilled in 1951 to 1,618 feet and cased to 53 feet. It is located roughly 1 '/ miles north of the other Wolf Creek test wells. The purpose of drilling was to determine if the gas-bearing sandstone beds previously encountered in Wolf Creek #1 would contain any oil. The records indicate a very poor gas show was encountered in the Killik Tongue but no oil or gas was recovered in production tests (Collins and Bergquist, 1959). The hole also penetrated the Seabee, Ninuluk, Chandler, and Grandstand Formations. The well is located on an unleased tract within the Northwest planning area (see Map 2). No offers were received in the June 2004 lease sale for the tract and near-term development is unlikely. The wellhead consists of a plate welded onto the 11 3/-inch casing cut off at ground level (Figure 27). There is no existing drill pad. Solid wastes consist of a few empty 55-gallon drums upstream along the upper floodplain of the creek. The well poses no threat to surface or sub-surface resources and has no potential to adversely affect future development. Wolf Creek #3 Wolf Creek #3 is a gas well. The well was drilled in 1952 to a depth of 3,760 feet and cased to 625 feet. It is deeper than the other two Wolf Creek wells because its primacy purpose was to test the Grandstand Formation (the producing formation around Umiat, 35 miles to the west). The Grandstand Formation produced from four different sands. In 35 N'igure 27: Wolf Creek #2 had casing cut off at ground level. open hole flow tests of the well produced at rates up to 445 MCFPD. The gas appeared to be sufficient to supply a small camp, but not of commercial proportions (Collins and Bergquist, 1959). Two plugs were set in the well above the Grandstand Formation. The top of the shallowest plug is inside the casing at 554 feet. In addition to the Grandstand, the hole penetrated the Ninuluk, Chandler, and Topagoruk Formations. Upon abandonment, the hole was filled with oil-based drilling muds and left open to the environment. A total of 103 banels of crude were used. The well is located on an unleased tract within the Northwest planning area (see Map 2). No offers were received in the June 2004 lease sale for the tract and near-ternz development is unlikely. The well poses no tlueat to surface or sub-surface resources and has no potential to adversely affect future development. The drill pad is shared with Wolf Creek #1. There is some minor debris at the site as noted in the Wolf Creek # 1 description. The wellhead was cut off six inches from the ground surface. This allows seasonal precipitation to accrue in the hole and spill over the sides, but the well poses no threat to surface or sub-surface resources and has no potential to adversely affect future development. Fish Creek #1 Fish Creek #1 was drilled by the Navy in 1949 near an oil seep. Total depth of the well was 7,020 feet. The well was plugged back to approximately 2,550 feet, drilled to a new total depth of 3,018 feet and cased to 3,017 feet. The well was drilled to test a large gravity anomaly that suggested the possible presence of petroleum-bearing rocks and some structural anomaly that might be a trap for oil. Very poor oil shows were identified in the Topagoruk Formation at depths from 5,550 - 6,000 feet and a productive sand was reported at 3,000 feet. The well is not a flowing well but was pump-tested at rates averaging 12 barrels of oil per day through agravel-packed completion. It also produced a small amount of methane gas. The hole encountered the Gubik, Shrader Bluff, Tuluvak, and Seabee Formations. Current condition of the wellhead is that it has no pressure at surface and consists of two wing valves and a master valve. The well is located within the Northeast planning area (see Map 2) on lease AA-081857 where, in 2004, ConocoPhillips Alaska Inc. drilled an exploratory well within seven miles. The target of the exploration is in the Upper Jurassic at depth of approximately 8,000 feet and it is not likely that this unplugged well will adversely affect development in the area. The recent Alpine Satellites EIS approves oil and gas development in this area. ConocoPhillips has proposed roads and a drilling pad less than eight miles from this well and will likely be 36 producing by 2008. Given the low level of risk, the plugging of this well should be postponed until infrastructure is established. Smficially, there are still some solid wastes present. The drilling pad and cellar construction consists of concrete reinforced with steel matting. The concrete, matting, and pilings are still in place today, albeit heaved by permafrost (Figure 28). Several 55- gallon trash drums filled with debris are located off the concrete pad. Other light debris is also present within 500 feet of the pad. The oil seep is located about 1.5 miles to the southwest of the well site and is inactive. The USGS 305-I reports the dimension of the seep as being 6' x 20' (Florence and Brewer, 1964), however, BLM personnel located the seep in 2001 and noted its dimension to be 3' x 6'. Simpson Core Test #28 Simpson Core Test #28 was drilled in September 1950 to a total depth of 2,505 feet and cased to 110 feet. Despite the depth, the hole did not encounter any hydrocarbon shows. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. A drill pad does not exist, however a large area of disturbance is visible. The wellhead consists of open casing inside a wooden cellar. There is considerable solid waste near the well. These include: numerous metal pilings, drill pipe, large wood fragments (spool, plywood, timbers), and some partially crushed drums. The solid wastes are unsightly, but pose no threat to humans or the environment. Simpson Core Test #13 Simpson Core Test #13 was drilled in the summer of 1949. It was a relatively shallow test and did not generate any significant oil or gas shows. The well encountered residual hydrocarbons in the Seabee and Grandstand Formations at depths of 1,079 - 1,084 and 1,138 - 1,148 feet (Robinson and Brewer, 1964). No oil or gas was recovered during production tests. The well is over three miles north of the Simpson Core wells that penetrated productive Grandstand sands. Total depth of the well reached 1,438 feet. The top 26 feet are cased and the hole was filled with water-based drilling mud. Fresh water aquifers were not encountered. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. 37 A drilling pad does not exist. Seven-inch casing was cut off at ground level and is very difficult to locate. The well is open to the atmosphere. There is no solid waste, nor is there anything hazardous regarding this location. It should not be considered a risk to surface or sub-surface resources. Simpson Core Test #15 Simpson Core Test #15 was drilled in August 1949 near an active oil seep. The well was drilled to a total depth of 900 feet and cased to 18 feet. The well encountered only residual hydrocarbons in the Ninuluk/Seabee and Grandstand Formations (Robinson and Brewer, 1964). No oil or gas was recovered during well tests. Additionally, fresh water aquifers were not encountered. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. There is no existing pad. The well was drilled about '/s of a mile north of a natural seep. The well consists of open ended casing with a height of 18 inches (Figure 29). The area is clean with no solid waste. This well poses no risks to the environment or human activities. Simpson Core Test #14 Simpson Core Test #14 was drilled in 1949 to a depth of 290 feet. The records do not clearly state how much casing was run but the well was left with casing above ground open to the atmosphere. Its present day location lies within 1000 feet to the west of an active oil seep. The well was not drilled deep enough to encounter the hydrocarbon stained sands evident in the Simpson Core #14A well. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development in the area is a distinct possibility within the next 20 years. This shallow well did not penetrate any hydrocarbon bearing zones and poses no risk to surface or sub- surface resources, nor does it have the potential to adversely impact future development. 38 Simpson Core Test #14A Simpson Core #14A was drilled in 1949 to a depth of 1,270 feet and casing was set to a depth of 32 feet. The well encountered only residual hydrocarbons in the Ninuluk/Seabee and Grandstand Formations. No oil or gas was recovered during tests (Robinson and Brewer, 1964) and fresh water aquifers are not present. Present day location of the well is approximately 1000 feet to the west of an active oil seep. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. East Simpson #2 East Simpson #2 was drilled in 1977 to 7,505 feet and cased to 6,427 feet. Five cement plugs were set, with the top of the shallowest plug set at 1,997 feet. The primary objective of the well was to test the Ivishak Sandstone where it onlaps the Pre-Devonian age basement rock (Husky Oil NPR Operations for U.S. Geological Survey, 1982). Small scale faulting was found between the wells in the area, possibly accounting for the thin section representing the Sadlerochit Formation. The well encountered very poor oil shows at 6,000 feet in the Torok Foianation and Endicott age sandstones were cored with poor porosity and dead oil shows. The well is officially listed as a dry hole. Upon completion of the production tests, the well was plugged back to 1,997 feet and filled with approximately 280 barrels of diesel to facilitate permafrost temperature measurements. However with East Simpson # 1 less than five miles away, the USGS has no plans to use this well for temperature monitoring. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this 39 • i well will have an adverse impact on development. If this exploration and development establishes infrastructure nearby, it would greatly facilitate plugging this well and significantly reduce costs. The wellhead consists of a casing head, side gate valve, a master gate valve, and a needle valve. The drilling pad is of the thin pad variety and is slowly being reclaimed by natural processes. Exposed pilings stick up a height of two feet from the surface, but no other objects needing removal are present (Figure 31). The cellar is a wooden 12' x 12' with standing water. With the existing plugs and the static condition of the well, there is no risk to surface or sub-surface resources. Kaolak #1 Kaolak #1 lies in the northwest portion of NPR-A and is considered one of the more remote well sites within the reserve. Kaolak #1 was drilled in 1951 to a depth of 6,952 feet and casing was set to 1,000 feet. Drilling served two purposes, to determine the presence of any reservoir characteristics, and to determine if oil or gas shows were present in this remote portion of the reserve. The site was chosen based on a seismograph survey in 1950 that identified an anticline at this location. The intent was to drill to a depth of 8,000 feet, but a windstorm destroyed the derrick. After the storm, the hole was abandoned due to unsatisfactory oil and gas shows. Findings indicated some very poor oil and gas shows in the Chandler Formation and very poor Figure 32: Kaolak #1 with cabin on the drill pad. shows in the Topagoruk Formation. Gas shows were attributed to association with the coal beds (Collins and Bergquist, 1958). Upon abandonment, no plugs were set and the hole was filled with heavy muds. The well is located on an unleased tract, in Southern NPR-A (see Map 2) where a lease sale is scheduled for 2008. Exploration and development in the area is a possibility within 40 Figure 31: East Simpson #2 is partially submerged during the spring thaw. Photo taken June 2003. i the next 20 years, but since this well did not penetrate productive oil and gas zones it will not have an adverse impact. There are no major surface issues. The working area is still visible due to a multitude of wooden pilings around the wellhead and a cabin on the north end of the pad (Figure 32). Off the pad, the area is clean. The wellhead is missing its upper components. All that remains is the top flange above the base plate and the casing spool, leaving 11 3/-inch casing open to the environment. The well is left with a casing head and is open to atmosphere. The wellsite is 45 miles southwest Wainwright, which is the nearest community. There are no hazardous materials or anything that would pose a risk to the general health and safety of the land. The cabin may be a concern, but dealing with the situation is outside the scope of this report. Meade #1 Meade #1 is a gas well drilled to a depth of 5,305 feet in 1950. The well was cased to 2,785 feet and two cement plugs were set, with the top of the shallowest plug tagged at 2,783 feet inside the casing. The well encountered some gas shows in one productive sand within the Grandstand Formation. The gas tested at rates up to 1.1 MMCFPD during openhole flow tests of the sand at 2,949 - 2,969 feet. The well is estimated to have gas reserves of 10 BCF. Gas pockets are relatively common in this portion of NPR-A due in large part to the underlying coal. At one point while conducting tests, some problems were encountered while attempting to pull a testing tool out of the hole; aball-peen hammer was inadvertently dropped downhole, causing the tubing to stick. The tubing could not be freed and as a result, it twisted off leaving tubing in the hole. When the lost tubing could not be pulled out, heavy muds were pumped downhole and the well was abandoned (Collins and Bergquist, 1958). The well is located within the Northwest planning area (see Map 2). The well is adjacent to a recently leased tract that received a high bid of $10.26 per acre during the 2004 lease sale. Exploration and development is a distinct possibility within the next ZO years and has the potential to target the Grandstand Formation. If left unplugged the well has no potential to adversely affect future development. There is no pad present at Meade #1 Several pilings and light trash are present, but s at ground level and consists of an open flange bolted to the top of the casing (Figure 33). This differs from the Navy reports that indicate the wellhead was abandoned in place. There is no record as to why it was removed. A BLM field crew bailed the hole and discovered a swedge and 2-inch needle valve junked downhole. This site is very remote (30 miles south of Atgasuk) and since the gas zones are currently isolated below the cement plugs there is a limited risk of adverse impacts to surface or sub-surface resources. 41 Figure 33: Meade #1 wellhead. Titaluk #1 Titaluk #1 was drilled in 1951 to a depth of 4,020 feet and is a dry hole. The well was drilled on the end of an anticline to test the oil and gas potential of foi7nations within the Nanushuk Group. A few very poor oil and gas shows were encountered in the Grandstand and Topagoiuk Formations, but no oil or gas was recovered during multiple production tests. The Ninuluk and Chandler Formations were also encountered, but with no shows. One cement plug was set at 3,471 feet. The placement of this plug is curious since the shows (albeit poor) were reportedly discovered above this level (Robinson and Bergquist, 1959). The well remains in a static condition. Titaluk #1 is located within the Northwest planning area (see Map 2) on an unleased tract. No offers were received. in the June 20041ease sale. Near-term development is unlikely. Surficially, there are no concerns with this well. The well is open, 10 3/- inch casing above ground to a height of 3 feet. It is open to the atmosphere. The area of disturbance is completely revegetated Figure 34: Titaluk #1 wellhead with wooden cellar. with no solid waste concerns. The wooden cellar is in a state of disrepair and filled with water (Figure 34). The site is clean with very little debris. There are no hazardous conditions associated with the surface. The nearest settlement is Umiat, 60 miles to the east. The well poses no risks to human safety or the environment. Skull Cliff Core Test #1 Skull Cliff Core Test #1 was drilled in 1947 to a depth of 779 feet and is a dry hole. No shows of oil or gas were reported while drilling through the Gubik, Grandstand, and Topagoruk Formations. While drilling to the target depth of 1,500 feet, the drillstring was lost in the hole and fishing attempts were unsuccessful in recovering the lost drillstring. The drilling mud was bailed down to the top of the fish and the remainder of the well was filled with diesel to 54 feet to prevent the wellbore from freezing and facilitate downhole temperature measurements. It is plausible that the casing could corrode and the diesel fuel could seep into the sub-surface strata, but since there are no fresh water zones in the well it is not considered a risk that would adversely impact sub-surface resources (Collins and Brewer, 1961). The well is located within the Northeast planning area (see Map 2). The well lies adjacent to a recently leased tract that received a high bid of $10.77 per acre during the 2004 lease sale. Exploration and development is a distinct possibility within the next 20 years but it 42 is unlikely this well will have an adverse impact on development since industry will likely target deeper, productive formations. An oil seep located at the base of Skull Cliff (land/ocean contact) was observed and documented in the 1940s, which influenced the Navy's decision to drill. BLM and USGS crews searched for the seep when they were in the area but nothing was found at the cliff/beach contact. However, another seep was reported in 1996 by a group from the Academy of Natural Sciences in a small gully about a mile to the east near the old radio tower site. This seep was never confirmed by BLM. Surficially, a drill pad was never established, but a large area of activity is defined by roughly 200 drums, metal tracks, wood debris and various other scraps that litter the site (Figure 35). Presently, the well consists of open casing with a wooden plug shoved into it. There does not appear to be any stressed vegetation that might indicate a hazardous situation. Since the well did not encounter oil and gas Figure 35: Solid waste primarily in the form of empty formations and has no pressure at drums litter the area around Skull Cliff Core Test. The the surface, it is not considered a Wellhead is in the upper left portion of the photo. risk to surface resources. The only potential risk is that this site lies near a popular winter route between Barrow and Wainwright and it is possible for a snowmachine to impact the solid waste. Barrow is approximately 30 miles to the northeast and Wainwright is about 60 miles to the west. Oumalik #1 Oumalik #1 was drilled in 1950 and is a dry hole. The well was drilled to a total depth of 11,872 feet and cased to 2,762 feet. It is the deepest well drilled by the early U.S. Navy program. The well location was positioned on the apex of the Oumalik Anticline and drilled with the intent of revealing the oil, gas, and water content of the penetrated stratigraphy. Two cement plugs were set, the shallowest of which is inside the casing at 2,543 feet. Very poor oil and gas shows were reported in the Grandstand Formation, and poor gas shows were noted in both the Topagoiuk and Oumalik Formations. Small undetermined volumes of gas were recovered during multiple production tests. It is believed that the gas encountered was large enough to furnish fuel to a camp but not large enough to become a commercial producer. The gas encountered during drilling showed high gas pressure, but the sandstones in which they were observed are thin with low porosity (Robinson and Bergquist, 1956). The gas zones are currently isolated by the cement plugs and pose no risk to sub-surface resources. The wellhead and a fabricated plate are below ground level. Two 2 'h-inch nipples open to the atmosphere are above ground to allow thermistor cables to be run into the well. The well is located within the Northwest planning area (see Map 2) on unleased tract that received no bids during the lease sale of 2004. Near-term development is unlikely. If left 43 unplugged, the well has no potential to adversely affect future development. The existing pad contains piping from a ground refrigeration system similar to Topagoruk #1. The ground in this area is somewhat swampy with high susceptibility to permafrost melt. Circulating cooled diesel fuel in the pipes enabled drilling to occur without thawing the ground. The steel pilings were pulled from the ground to be reused at another site (Robinson and Bergquist, 1956). However, steel pipe filled with diesel fuel remains. A 6- inch circumference of stressed vegetation was noted around several of the low-cut pipes. Despite the diesel, the well does not pose a risk to any existing communities or habitation. It is in a remote location approximately 55 miles southeast of Atgasuk. Overall, the well poses no risk to people or the environment. East Oumalik #1 East Oumalik # 1 was drilled on a ridge that overlooks an unnamed tributary of the Oumalik River. Topographic relief is approximately 100 feet. The drill site is highly remote as the nearest village (Atgasuk) is 65 miles away. The well was drilled in 1951 and reached a total depth of 6,035 feet and is cased to 1,100 feet. It is a dry hole. Very poor oil and gas shows were reported in the Grandstand Formation and very poor gas shows were reported in Topagoruk Formation. The well is located within the Northwest planning area (see Map 2) on an unleased tract that received no bids during the lease sale of 2004. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development. The well was left with open casing below ground level and has thennistor cables protruding from inside the casing. The casing is marked by a 7-foot, 3/-inch pipe. The open pipe lies within awater-filled cellar. The standing water has produced numerous algae and other aquatic vegetation obscuring the wellbore. Surficial hazards consist of several 10-foot timbers and a few 4-foot pipes (probably rig anchors) sticking up out of the ground. The site is mostly overgrown with shrubs and appears to be relatively clean. The airstrip, incoming, and outgoing trail scars are obvious and can be used to navigate to the wellsite. There are no risks associated with the well in its current condition and was given this ranking due to its close proximity to Oumalik #1. Topagoruk #1 Topagoruk #1 was drilled in 1951 to a depth of 7,154 feet and is a dry hole. The intent was to test a small, buried anticline and the various formations associated with it. The well was cased to 6,073 feet, plugged back to 6,175 feet and then drilled to a new total depth of 10,503 feet. Prior to re-drilling to total depth, approximately 250 barrels of crude oil from Cape Simpson were added downhole to help offset lost circulation and caving. Additionally, 20 ban•els of diesel were added downhole during the drilling phase. No plugs exist in this well. The well is left with open casing to the surface and thennistor cables protruding from the casing (Figure 36). The well encountered the following stratigraphic units while drilling; Gubik, Grandstand, Topagoruk, and Oumalik Formations, Middle and Upper Jurassic rocks, Shublik Formation (Triassic age), Permian rocks, and Lower-Middle Devonian rocks. Hydrocarbon shows were limited to a few very poor gas shows in the Oumalik Formation. No oil or gas was recovered during 44 multiple production tests (Collins and Bergquist, 1958). The well penetrated no fresh water aquifers and does not represent a threat to surface or sub- surface resources. The well is located within the Northwest planning area (see Map 2). It is adjacent to a recently leased riact, receiving a high bid of $50.00 per acre during the NW NPR-A lease sale of 2004. Exploration and development in the area is a distinct possibility within the next 20 years but since this well did not penetrate productive oil and gas zones it will not have an adverse impact. There is not a visible pad, but rather an area of disturbance. Disturbance stretches 1/4 mile in an Figure 36: Topagoruk #1 casing on its east-west direction and /8 of a mile in a north- side. When the casing was pulled out of south direction. Solid wastes exist in the fonn of the ground, thermistor cables were piping remaining from a refrigeration system that discovered. circulated diesel to keep the permafrost frozen. A potential hazard exists because diesel still occupies the ground circulation lines. These lines stretch approximately 750 feet to the east, 250 feet to the north, and 100 feet to the south from the wellhead. Other debris on site include some large, partially-burned timbers, awater-filled wooden box (Figure 37) that resembles a cellar (1/4 mile east of the wellhead), and drilling muds. Atgasuk is the closest village approximately 30 miles to the southwest. The well is remote with the exception of a subsistence camp approximately one mile southwest of the wellhead along the Topagoruk River. East Topagoruk #1 Topagoruk's wellhead consists of an open hole cut off at the ground surface with several thermistor cables.. A thin piece of weathered metal fits around the cut-off casing to resemble a marker. The weathered metal has been smashed at the base and now lies bent in half on its side. Overall this site poses little hazard to the environment or human population. East Topagoruk #1 was drilled on top of a small ridge in the Chipp River delta in 1951. It reached a total depth of 3,589 feet and is cased to 1,100 feet. The purpose of the well was to test an anticline with closure as well as test the fluid content of the permeable Cretaceous sandstone (Collins and Bergquist, 1958). A very poor gas show in the Topagoruk Formation is the only reported hydrocarbons encountered in the well and no oil or gas was recovered during multiple production tests. One cement plug was set in the 45 Figure 37: Drilling muds and a wooden box that resembles a cellar are located about '/< mile east of the wellhead. well at 1,049 feet. The well is located within the Northwest planning area (see Map 2) on a recently leased tract. The tract receiving a high bid of $84.99 per acre during the NW NPR-A lease sale of 2004. Exploration and development in the vicinity of this well is a distinct possibility within the next 20 years but it is unlikely this .well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper formations. A drill pad does not exist. There are a few rig anchors near the wellhead, but no other surficial debris. The current state of the wellhead is open-ended 10 '/-inch casing. Casing height is three feet above- the ground surface. It is housed in a small 9' x 9' water-filled cellar. The area is remote and poses no health and safety risks to humans or the environment. Knifeblade Wells There were three shallow test wells drilled in the Knifeblade Ridge area. Knifeblade #1 was drilled on the ridge at the head of a small stream, with wells 2 and 2A drilled about a mile downstream. The wells are in a highly remote location with Umiat being the nearest settlement, 65 miles to the east. Knifeblade #1 Knifeblade #1 is a dry hole drilled in 1951. The well was drilled to a depth of 1,805 feet and cased to 1,211 feet. The purpose of the well was to test the oil and gas properties of the Grandstand and Tuktu Formations (Robinson and Bergquist, 1959). The well encountered very poor gas shows in the Killik Tongue of the Chandler Formation and very poor oil and gas shows in the Grandstand Formation. The well is located on an unleased tract, in Southern NPR-A (see Map 2) where a lease sale is scheduled for 2008. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development. 46 Knifeblade #2 Knifeblade #2 is another dry hole drilled in 1951. It was the first of the three Knifeblade wells drilled and reached a total depth of 373 feet, cased to 45 feet, before being junked and abandoned. The purpose of the well was to test the oil and gas properties of the Grandstand and Tuktu Formations (Robinson and Bergquist, 1959). The well did not encounter any hydrocarbon shows. The well is located on an unleased tract, in Southern NPR-A (see Map 2) where a lease sale is scheduled for 2008. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development. Surficial issues are negligible. A drill pad does not exist and the wellhead consists of open-ended casing. There are approximately eight empty drums near Knifeblade #2 and #2A. The wells are highly remote and should not be considered a threat to the environment or human activity. Knifeblade #2A Knifeblade #2A, also drilled in 1951, reached a total depth of 1,805 feet and was cased to 38-feet. The well lies 28 feet to the north of Knifeblade #2A. The purpose of the well was to test the oil and gas properties of the Grandstand and Tuktu Formations (Robinson and Bergquist, 1959). Only very poor oil and gas shows were reported in the Grandstand Formation. The well was left with casing open to the atmosphere and poses no threat to surface or sub-surface resources in its current condition. The well is located on an unleased tract, in Southern NPR-A (see Map 2) where a lease sale is scheduled for 2008. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development. Simpson #1 Simpson #1 test well was drilled with a rotary rig in 1948 by the U.S. Navy. The well was drilled to a total depth of 7,002 feet and cased to 5,954 feet. The purpose of the well was to test the various formations of the Lower Cretaceous and Upper Jurassic rocks. The well encountered several very poor oil and gas shows and one productive gas sand in the Lower Jurassic at a depth of 6,183 - 6,193 feet. The well produced gas at rates up to 3.0 MMCFPD during open hole flow tests of this Lower Jurassic sand. The gas zones are currently isolated from other formations and the surface by two cement plugs set above the productive sand. The top of the shallowest plug is at 5,520 feet (Robinson and Yuster, 1959). The well is located within the Northwest planning area (see Map 2) adjacent to recently leased tract that received a high bid of $7.51 per acre during the lease sale of 2004. Exploration and development in the vicinity of this well is a distinct possibility within the next 20 years and this exploration has the potential to target the Lower Jurassic. Since the well is partially plugged, however, it poses little risk to surface or sub-surface resources and will not likely adversely affect any future development. 47 • The pad is highly visible and was constructed in the same fashion as Fish Creek #1 in which concrete was used as a working pad. Concrete wa.s poured over a landing mat which was placed on pilings. As a result of ground movement from perniafrost freeze/thaw cycles, the concrete has buckled in numerous places creating apartially- collapsed surface. This feature provides excellent shelter to small animals and rodents. Additionally, there is a small pile of drilling muds near the wellhead. The well was left equipped with a casing flange, spool w/ side bull plug, and another flange and nipple and is shut-in with no pressure at surface. The components past the flange have since been removed. Overall, the current condition of the site is non-threatening to the sparse human population and the surrounding environment. North Simpson #1 North Simpson #1 was drilled in 1950 to a depth of 3,774 feet and cased to 109 feet. No hydrocarbon shows were reported during the drilling of this well as no sandstone was encountered (Robinson and Yuster, 1959). Upon completion, no plugs were set and the hole was filled back with muds. The well is located within the Northwest planning area (see Map 2) adjacent to a recently leased tract that received a high bid of $12.76 per acre during the NW NPR-A lease sale of 2004. Exploration and development in the vicinity of this well is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper formations: South Simpson #1 South Simpson #1 was drilled in 1977. The purpose of the hole was to test the Sadlerochit Formation where it laps onto the south flank of the Barrow Arch. The well was drilled to 8,795 feet and cased to 7,206 feet. Reports show that poor gas shows were identified in the Nanushuk Group, Kingak Shale and Shublik Formation. Gas flowed at a rate of 75 MCFPD between 6,522 - 6,568 feet within the Kingak Shale (Gyrc, 1988). The gas contained more than 70% nitrogen. The origin of the high nitrogen content is unknown, but appears to be a localized phenomenon (Burruss, 2003). Sandstone tongues 48 • (Simpson sand) within the Kingak Shale in the Simpson and Barrow localities are known to display good gas reservoir quality (Houseknecht 2001). Poor oil shows were discovered in the Nanushuk Group and Shublik and Torok Formations. Drill stem tests did not recover any oil. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $5.01 per acre during the lease sale of 2004. Exploration and development is a distinct possibility in the near future since the well is properly plugged it will have no adverse impacts on development. Surficially, the pad and pits are in good shape. The cellar has been backfilled rigure 4U: South Simpson #1 had its cellar backfilled with silt, with silt which resulted In consequently burying the casing head. the burial of the casing head (Figure 40). Above the surface, the wellhead consists of a 4-inch line pipe and a master valve. The master valve is frozen in the open position. The needle valve previously located above the master valve no longer exists. Beneath the casing head the well is plugged to surface and has no potential to adversely effect surface or sub-surface resources. The wellhead stands about eight feet high. Aplumb-bob was dropped and hit solid at 8 feet and stuck. It was subsequently lost. An old, stripped snowmachine sitting next to the wellhead is the only sizable object that would be considered solid waste. Overall, there is no risk associated with this well. Inigok #1 Inigok #1 was drilled in 1979 to a depth of 20,102 feet and cased to 17,432 feet. The well objective was to test astructural/stratigraphic trap within the Sadlerochit and Lisburne Groups (Husky Oil NPR Operations for U.S. Geological Survey-Inigok, 1983). Some very poor gas shows were recorded in the Sag River, Nanushuk, and Endicott Group. Poor oil shows were reported for the Kingak Shale and Lisburne Group. The best shows were found in the base of the Torok Formation at 8,852 feet. No oil or gas was recovered during multiple production tests. The wellhead consists of three spools, each with a gate valve, a master valve, and a needle valve. Ten cement plugs were set in the well and it is plugged to surface. The well is located within the Northeast planning area (see Map 2) on a recently leased tract that received a high bid of $20.34 per acre during the lease sale of 2002. Total E&P Incorporated drilled an exploratory well 15 miles north of Inigok #1 and used the gravel 49 • pad and airstrip near the well for staging areas and a camp. It would be fairly simple to remove the wellhead but the well has no potential to adversely affect surface or sub-surface resources. Additionally, the well poses no threat to adversely affect future development. Inigok #1 is one of the few logistical centers Within NPR-A (Figure are visible in the top of photograph. A road leads from the apron of 41). The airstrip and pad the airstrip to the drilling pad. are maintained with no solid .wastes present. The wellhead poses no risk, and with the plugs already in place, could be removed. Additionally, this well has ayear-round airstrip and serves as a logistical base to various NPR-A activities. USGS Monitored Wells The USGS has used wells drilled in the NPR-A for collecting temperature data to better understand both the global temperature pattern and its effects on the permafrost. The wells that are currently used are properly plugged above the hydrocarbon bearing zones and into the well casing. The wells are filled with diesel fuel down to the shallowest plug at depths ranging from 1,500 - 3,000 feet. For a list of wells see Appendix B. The program began in 1958 and will continue for the foreseeable future. After this project ends, the wells will have the diesel extracted and the well will be properly plugged to surface. Diesel is a non-con•osive agent, and even if the casing should conode there would be no impact to the surface resources and minimal impact on the sub-surface resources as there are no known fresh water aquifers in NPR-A. The following wells are monitor wells with surficial issues. It is difficult to establish a rank since the wells are sufficiently plugged. The cleanup priority is difficult to determine as the primary tlu•eat lies with wells having downhole issues. However, political concerns could influence the timing in which the surface issues are dealt. East Teshekpuk #1 East Teshekpuk #1 was spudded in March 1976. The well was drilled to a depth of 10,664 feet. It is an active USGS monitor well that was properly plugged. The. top of the shallowest plug is located at 2,400 feet. From that point to the surface, the hole is filled with diesel fuel. With the well properly plugged and diesel fuel being anon-corrosive agent, there is no downhole issue with the well at this time but there are solid wastes buried on site that may warrant removal. 50 • • East Teshekpuk #1 was drilled on a small peninsula on the southeast side of Teshekpuk Lake. The southern shore of the peninsula is protected from the prevailing northerly winds, however the north shore doesn't have the luxury of a barrier and is subject to erosion. Unfortunately, solid wastes from the camp and drilling operation were buried on the northern portion of the pad, possibly in the old reserve pit. The northern shore has been battered by numerous storms which have eroded the shoreline and exposed the solid wastes. The wastes are unsightly and potentially hazardous. While the nearest village of Nuiqsut is 52 miles to the southeast, Teshekpuk Lake is rich in subsistence resources and numerous sununer cabins dot the lake's shoreline. It is possible that at the time of surficial restoration, the downhole could be pumped free of diesel and plugged to the surface. Awuna #1 Awuna #1 was spudded February 1980 and completed April 1981. It is the only well drilled in the southwest portion of NPR-A and is 90 miles south-southwest of Atqasuk. Awuna is the most remote well in the entire petroleum reserve. The well was drilled to a total depth of 11,200 feet. Drilling was conducted over two consecutive winters. Ice roads and an ice airstrip were constructed for logistical support. The project cost approximately $6 million (Husky Oil NPR Operations-Awuna, pg 5). Due to the orientation of the pad, the prevailing winds force wave action into the drilling pad, undermining the sands and silts which make up the pad. Below the sands and silts, Styrofoam was used to insulate the underlying permafrost. Wave action has eroded tens of feet into the drilling pad, exposing the Styrofoam, which consequently breaks loose and blows away. Wooden pilings exposed from erosion show how much attrition has taken place. Styrofoam can be seen all around the pad with pieces blown up to 5 miles away. .~ 1 ev„ ~. ~~ Downhole, the well is in good shape with sufficient plugs. Diesel fuel fills the top 4,000 feet. The well is an USGS monitor well. Wellhead components are in working condition with no problems. The immediate concern with this site is the blowing Styrofoam, but as the years progress erosion could become a major issue (Figure 42). The loose Styrofoam should be cleaned Figure 42: Awuna wellhead with exposed wooden pilings and up and erOSlon progress Styrofoam. should be monitored on an annual basis. It is also worth mentioning that the same type of scenario is unfolding at Tunalik #1 (another USGS well). Wave action from the reserve pit is beginning to 51 • • undermine Styrofoam from the drilling pad. Tunalik #1 differs from Awuna #1 in that prevailing wind direction does not force erosion in the direction of the wellhead. Uncased Core Tests There are thirty-nine uncased core test holes. These holes were typically left filled with drilling mud and abandoned without being plugged. Drilling depths ranged between 500 and 1,500 feet depending on the purpose of the test. By nature, core tests were drilled to test soils, permafrost, or lithologic units. They were not drilled for oil or gas exploration purposes and did not encounter hydrocubons. Many of the cores are stored in the Alaska Geologic Materials Center (Figure 43}. The BLM has examined the cores and they are extremely friable. It is likely that these uncased core holes have naturally collapsed and harmlessly blended into the environment. There is no surface indication of their location and BLM has been unsuccessful in locating them during several visits to their reported location. They do not pose any potential risks. Barrow Gas Wells The Barrow Gas Field Act of 1984 (P.L. 98-366, 98 Stat. 468, July 17, 1984) allowed the U.S. Navy to transfer several wells to the North Slope Borough. The Navy drilled six shallow wells between 1953 and 1974 to test the natural gas potential. Between 1974 and 1982, 10 additional wells were drilled to help supplement the local gas supply. The wells were developed for use by the local government agencies and Barrow residents. The act conveyed the sub-surface estate, held by the federal government and any other interest therein, to the Arctic Slope Regional Corporation (ASRC). The BLM acknowledges the surface and sub-surface lands as conveyed and the Office of the Regional Solicitor has confirmed that the Transfer Act included the wells and well locations, and any liabilities associated with these wells are the responsibility of ASRC. 52 test, are stored in the Alaska Geologic Materials Center. Plugged Wells Square Lake #1 • Square Lake #1 is a Navy well that was drilled to a depth of 3,984 feet. Its primary intent was to test the Cretaceous rocks in east-west trending anticline structure (305H pg 424). No significant shows of oil were found. Gas shows were encountered in various sandstone beds between 1,600 and 1,900 feet, but otherwise the hole was dry. Upon completion, four plugs were reported to be set with the upper plug at 728 feet, well above the gas shows. Two other plugs were reported to be set in the gas zone, spanning depths of 1,640 - 1,840 and 1865 - 1934 feet. In addition to the six plugs, water and mud fill the remaining distance to the surface (Collins and Berquist, 1959). Upon successive visits to the site, BLM field crews dropped aplumb-bob down the hole and hit a solid obstruction between 8 and 10 feet. Don Meares, Northern Field Office, visited the site in August 2003 with an underwater camera and determined the solid surface to be cement. The Square .Lake area is clean of debris with a few deadmen pilings (anchors) near the wellhead that could pose a ground hazard. The wellhead is open casing cut off at ground level. Umiat #2 and #5 The Umiat #2 and #5 wells were plugged and abandoned in 2002 by the COE (Figure 44). The wells. were drilled on a common four-acre pad in 1947 and 1951. The purpose of the wells was to test for producing lithologies and determine petroleum quantities. Umiat #2 penetrated the Gubik Formation, Nanushuk Group (Chandler and Grandstand Formations), Topagoruk Formation and Oumalik Formation. Problems with the drilling muds were encountered while drilling Umiat #2. Analysts determined that the fresh water drilling fluid caused formation damage and the Umiat #5 well was drilled adjacent to the #2 with acable-tool rig. The well produced 400 barrels per day with the most productive sandstones in the lower Chandler and upper Grandstand. Below a depth of 1075 feet, 107 han•elc of rnula nil frnm tenth Umiat and Simpson were used as a drilling fluid, as well as 11 barrels of diesel fuel (Robinson and Bergquist, 1956). In 2000, the Colville River threatened to erode both wellsites away. The COE took action under the FUDS program in the winter of 2001-2002 to plug, abandon and remove any surface features. The concrete lined cellar of Umiat #2 and wooden platform from Umiat #5 were removed. - - Costs were approximately $25 million dollars due in part, to soil Approximately 30,000 tons ofpetroleum-contaminated soil was excavated. remediation. The soil was 53 • • transported on an ice road to the Umiat camp where it was thermally treated in a rotary kiln to remove petroleum residues. Small quantities of PCB contaminants were unexpectedly encountered after the excavation was completed. The sow•ce of the PCBs has been linked back to the #5 well and the fluids used downhole. The ever-shifting Colville River continues to erode the north bank and is approximately 50 feet from the old wellbores. With the removal of hazardous soils, this site should not be considered a threat to humans or the environment. Umiat #3 Umiat #3, also known as Umiat Core Test #1, was spudded in December 1946 and drilled to test some of the oil bearing zones encountered while drilling Umiat #1. The well was drilled on the northeast corner of Umiat Lake just below the hill from Umiat #4 (Figure 45). Umiat #3 penetrated the Gubik Formation and the Nanushuk Group. The Grandstand Formation within the Nanushuk Group is considered to be the primary source of oil between the depths of 258 and 514 feet. The hole produced 50 barrels per day prior to shutdown. The well was re- tested nine months later with production dropping to 24 barrels per day (Robinson and Bergquist, 1956). The wellhead consists of homemade components with a single water service type valve and is capped with a needle valve. There is no seeping present at this site, however seeps are common in the area, including an active seep in Umiat Lake. An extensive piping system is still visible. The pipes probably supplied water during the drilling phase. They connect Umiat #3 to #4 which then follow the hill from Umiat #4 to aside channel of the Colville River. Their function was to either carry water to the drilling sites or assist during the well's production phase. The overall surficial conditions including the wellhead and piping, do not pose a tlueat to human health nor the environment. BLM plugged the well in May 2004. Umiat #4 After encountering relatively poor oil shows on the first three wells, operations were suspended until 1950. Cable tool drilling rigs were introduced to determine if the fresh water muds had hindered the oil production in the previous wells (Robinson and Bergquist, 1956). Cable tool wells did not require the excavation of a cellar; therefore Umiat wells #4-#7 did not have cellars. Umiat #4 is located on top of the hill to the northeast of Umiat #3 (Figures 45, 46). The well was drilled May 1950 to a maximum depth of 840 feet. The hole bored through the Ninuluk, Chandler and Grandstand Formations. Oil was found in the upper and lower 54 Figure 45: The view from Umiat #4 looking southwest toward Umiat Lake and Umiat. Umiat #3 is located on the near shore of Umiat Lake. sandstone of the Grandstand Formation. Drilling encountered good oil shows around 300 feet with a total 500 barrels produced (Robinson and Bergquist, 1956). The wellhead consists of 11 3/-inch casing protruding 36 inches above the ground surface. The casing is capped with a steel plate. Upon removal of the cover, the hole was open to the environment. No valves or gauges are present. The well was plugged by the BLM on May 9, 2004. The well poses no risk to humans or the environment. Umiat #8 .J Like the other wells drilled in the 1950s, Umiat #8 was drilled using cable tools. The well was spudded May 1951 and completed August 1951. It is located on top of a ridge that separates Umiat from the Bear Paw Creek valley. Drilling intention was to determine the quality and quantity of hydrocarbons in the Grandstand formation near the crest of the anticline structure. The hole encountered the Seabee, Ninuluk, Chandler, and Grandstand Forniations. The Grandstand Formation produced approximately 60-100 barrels per day of oil and more than 6 million cubic feet per day of gas. The well was shut in with a gas pressure of 275 pounds per square inch. The gas was analyzed by the Bureau of Mines and determined to be 97.3 per cent methane. Brine was mixed (35 lbs of salt per barrel of water) and used in the drilling fluid to prevent freeze up. Brine solution of approximately the same ratio of salt per barrel of water was used to kill the well and set the plug while cementing casing. A total of 21,695 pounds of salt were used in the well (Robinson and Bergquist, 1956). The well was plugged May 2, 2004. Prior to plugging, the well was nicknamed the "Whistling Well" due to the gas of which was escaping through fittings and valves in the wellhead. The wellhead is easily the most complex of the 11 Umiat test wells. It consists of five valves and multiple gauges. It has several homemade components and reaches a total height of ten feet. After reporting the seeping gas in 1996, two new valves and gauges were installed in 1997. The new gauges have been checked regularly since 1998 and have consistently read 250 psi. Despite replacing the two valves and gauges, gas continued to leak from the wellhead. The largest of the leaks occurred just above the top flange where a 4-inch nipple and collar are welded together. Other leaking occurred at the fittings of some of the gauges. The wellhead is sited on a gravel pad. A series of piping extends from the wellhead to a small stock tank about 100 feet to the south. The tank probably was used as a holding tank for the oil while testing the production potential of the hole. The same style of stock tank is present in various old photographs found in the Umiat area and may be the same 55 Figure 46: Umiat #4 prior to plugging. The wellhead is located in the center of the photograph. • tank. Oil from inside the tank was sampled in 2004 with test results positively identifying PCB contamination which is slightly below the level of concern. Umiat #10 Umiat #10 was spudded September 1951 and completed January 1952. This well was drilled to test the Umiat anticline and is located about a half mile northwest of Umiat #8. Total depth of the well is about 1,573 feet. When the well was bailed, it produced 222 barrels of oil in a 24-hour tune span. The most productive layers occurred at 980 feet and 1,095 feet, penetrating both the Ninuluk and Grandstand Formation (Robinson and Bergquist, 1956). Also encountered were the Seabee and Chandler Formations. The hole was somewhat problematic as it caved considerably during drilling. Operations consisted of a drill rig set on a foundation of 12" x 12" timbers with a thin layer of gravel in between. Twenty-five pounds of salt mixed with Aquagel and water (per barrel) were used downhole to help lubricate the drill bit above the 650-foot marker (from the surface). More Aquagel-brine mud was used down to about 1,000 feet to keep the hole from caving. The wellhead contains two valves; a master and a gate, both are closed. The total height of Umiat # 10 is approximately 10 feet. The 8 5/8-inch casing is flared and open at the top. This well was plugged May 6, 2004 (Figure 47). x,~ The surface near Umiat #10 is in good shape. There is no existing pad and no solid wastes. With the recent plugging of the well, it is not a risk to human health and safety or the environment. 56 Figure 47: Plugging operations at Umiat #10. May 2004. APPENDIX B • 20 Wells Currently Monitored by the United States Geological Survey: NAME Atigaru Awuna* Drew Point East Simpson #1 East Teshekpuk West Fish Creek #1 Ikpikpuk Kugura Koluktak* Kuyanak Lisburne North Inigok North Kalikpik Peard Bay Seabee* South Meade South Harrison Bay Tunalik* Tulageak West Dease HOLE DEPTH(meters) 648 884 640 600 727 735 615 582 227 856 532 625 660 591 393 549 399 556 756 823 *Are also part of the CALM network (Circumpolar Active-Layer Monitoring). 57 • Background and History Two U.S. Government exploration programs focused on the petroleum reserve. The U.S. Navy began the first exploration program in 1944 and drilled a total 91 holes in the Reserve. The Navy focused on Cape Simpson (Figure 1) and Umiat (Figure 2); the two most prominent oil seeps. Navy contractors drilled 11 test wells at Umiat and another 34 on Cape Simpson. Overall; the program located eight oil and gas fields (Fish Creek, Gubik, Meade, Simpson Peninsula, South Barrow, Square Lake, Umiat and Wolf Creek). Following the conclusion of the Navy program in the mid-1950s, focus began to shift eastward toward what were to become State lands. Exploration activities in the petroleum reserve between 1953 to 1975 were limited to 9 wells in the Ban•ow area until interest increased following the 1973 Arab oil embargo. The U.S. Navy and the USGS contracted with Husky Oil Corporation to drill 9 and 27 exploratory wells respectively from 1975 to 1981 with one new discovery in the Walakpa Gas Field. The National Petroleum Reserves Production Act of 1976 (NPRPA) changed the name of the Reserve from NPR4 to the NPR-A and transferred administration to the U.S. Department of the Interior (USDOI). ~~./ 3 Figure 2: Oil seeping in Umiat Lake. ~ ~ in remote areas of the leased acreage. These staging areas have the potential to aid BLM's future remediation work associated with the legacy wells. Map 3 shows the relationship of usable airstrips to legacy wells. BLM efforts 1976-1982 The USGS initiated cleanup of the early Navy wells in 1976 and contracted Husky Oil NPR Operations, lne. to manage the project. The NPR-A was divided into four quadrants; Arctic Coastal Plain, Northwest, Southwest and Southeast. The cleanup effort focused on the solid and hazardous materials that were abandoned in place by the Navy and was carried out during two phases. After the spring thaw, crews would travel by helicopter to new sites to break down and tl•ansport the wastes to an accumulation site. If a suitable site was located, non-combustible solid wastes were buried. While the ground was still frozen in the spring, aCat-Train crew retrieved wastes from storage sites established the previous summer. When hazardous materials (explosives and full drums of barite) were found they were transported to the storage site and hauled out the next spring. There is no evidence of anything hazardous remaining on site. In 1978, an extensive cleanup occurred at East Oumalik, East Topagoruk, Knifeblade; Ikpikpuk (explosives), Skull Cliff, Square Lake, Titaluk, Topagoruk, and Wolf Creek. A total of $1.87 million dollars was spent and 7.2 million pounds of solid wastes were handled, stockpiled or burned. During 1979, cleanup occurred at Fish Creek, Grandstand, Gubik, Oumalik, and several other areas in which a well - - was planned but not drilled. Approximately $1.85 million dollars were spent and 24.1 million pounds were handled, stockpiled or burned. Field work for 1980 consisted of cleaning up what had been stockpiled and over-wintered from 1979. There is no recorded summary of cost or amount of wastes handled past 1979. In 1981, Husky discharged itself as contract operator and put out an invitation for bids. While waiting for bids, Husky continued its scheduled spring cleanup work at East Oumalik (Figure 5), Wolf Creek, Fish Creek, Kogru River, Meade,_Oumalik, Square -- __ Lake _and_ Titaluk. The USGS did not fund additional work at Skull_Chff. The contract received no bids and Husky did not return. The USGS drilling program ceased in 1982. is void of surficial debris. The cellar is visible in the mid- right portion of the photo. • recognized as rough estimates. Costs can increase significantly if the downhole well conditions pose difficulties that are not apparent from the surface (e.g. collapsed casing, junk in hole, lost circulation). The cost estimates also do not represent the costs associated with removing barrels, piping, pilings, and other remnants of the legacy well exploration activity. These "solid wastes" pose no identified risk to surface resources other than being an unsightly reminder of the early exploration and the potential costs to remove these items have not been evaluated in any detail. Seven legacy wells have been plugged to date. One well is Square Lake #1 where several downhole plugs are documented up to a depth of 700 feet. No surface plug was documented but field investigations by BLM personnel revealed the existence of a cement surface plug. Based on professional judgment, this well is considered plugged. Two were plugged in Umiat by the COE at a cost of $4.1 million in 2002. Umiat #2 and #5 had down-hole problems that could not be predicted or identified until the well plugging work commenced. The COE actually spent closer to $25 million after including the cost of soil remediation. With no down-hole problems and simplified plugging procedures; the BLM plugged the other four at a total cost of $1.4 million in 2004. Umiat has several unique conditions that contributed to keeping the costs to plug the wells relatively low including the maintained airstrip, fuel supply and camp facilities. These facilities greatly facilitated moving equipment to the wellsites and conducting the subsequent work but are not found at the other legacy wellsites. Another factor that makes plugging wells simpler at Umiat is the shallow depth of the wells. With the remaining legacy wells situated in more remote locations of NPR-A and some of the wells being significantly deeper, the costs to plug them will be much greater than at Umiat. Fuel, camp facilities, and equipment will have to be brought to the sites overland by Cat-Train. The average cost to plug the Umiat wells has thus far been $920,000, although the BLM was able to plug four of them for an average cost of $350,000. The average cost to plug the remaining wells in the more remote locations of NPR-A outside of Umiat is expected to exceed $1,000,000 each. Below is an example of the cost estimate to plug a Simpson Peninsula well. The example also illustrates how wells in the same area can be plugged for a reduced incremental cost; Cost to plug Simpson Core #26 Incremental Well 7 Total Wells Mobilization $500,000 $40,000 $740,000 Demobilization $250,000 $25,000 $400,000 Equipment $750,000 $125,000 $1,500,000 Labor $150,000 $83,300 $650,000 Lodging $75,000 $42,500 $330,000 Materials $750,000 $66,700 $1,150,000 Disposal $30,700 $30,700 $215,000 Sampling $3,000 $3,000 $21,000 Total $2,508,700 $416,200 $5,006,000 ~~, ~~ ~~E~~E~ t. ~~`~ 10~ ll • • Maunder, Thomas E (DOA) From: Thomas_Zelenka@blm.gov Sent: Wednesday, January 20, 2010 2:24 PM To: Maunder, Thomas E (DOA) Cc: Greg_Noble@blm.gov Subject: Square Lake Test Well 1 -Drilling Operations Attachments: Square Lake No 1_Drilling Operations Summary_AOGCC.pdf; DS000001.JPG Square Lake No DS000001.]PG ~ JI~I~ ~ ~ ~~~~ 1_Drilling Oper... (596 KB) You requested some operational information on the subject legacy well via email to our Greg Noble. The below write up is from our Legacy Well Report which summarizes the drilling and plug back of this well. The blue highlighted text indicates the follow up trips to this well to determine well plug back status. There appears to have been some work performed on the well following initial plug and abandonment operations of April 1952. ****************************************************************************************** ******************************************* Square Lake Test Well #1 Square Lake #1 is a Navy well that was spudded January 26, 1952, drilled to a depth of 3,987 feet with cutting and cores taken and analyzed, and the well was completed April 18,1952 by being plugged and abandoned. Its .primary intent was to test the Cretaceous rocks in east-west trending anticline structure (Collins and Bergquist 1959). No significant shows of oil were found. Gas shows were encountered in various sandstone beds between 1,600 and 1,900 feet, but otherwise the hole was dry. Upon completion, four plugs were reported to be set in the hole through open-end drill pipe to seal off the gas-bearing sandstones and to protect them from contamination by water- bearing sands. The first plug was set by displacing cement at 2,935 feet with the top of the plug at 2,745 feet. The next two cement plugs were reported to be set in the gas zone, spanning depths from 1,865 to 1,934 feet and from1,640 to1,840 feet. The top plug was set from 770 to 741 feet, well above the gas shows and spanning the 10-3/4" casing shoe at set at 728 feet. In addition to the four cement plugs, water and mud filled the remaining distance to the surface (Collins and Bergquist 1959). Upon successive visits to the site, BLM field crews dropped a plumb-bob down the hole and hit a solid obstruction between 8 and 10 feet below surface. Don Meares, Northern Field Office, visited the site in August 2003 with an underwater camera and determined the solid surface to be cement. The Square Lake area is clean of debris with a few deadmen pilings (anchors) near the wellhead that could pose a ground hazard. The wellhead is open casing cut off at ground level. ****************************************************************************************** ****************************************************************************************** ********************************************* I have scanned the operational sections from Geological Survey Professional Paper 305-H which described the results of the drilling operations of the Square Lake Test. well No. 1 and they are attached below. I also included a photo of the current well location as of 2002 field trip. (See attached file: Square Lake No 1_Drilling Operations Summary_AOGCC.pdf) (See attached file: DSCOOOOI.JPG) 1 • • If there is any additional information that you would like sent, please let me know. This was all the operational drilling and plugging information that I could find. Thomas Zelenka, P. E. Petroleum Engineer BLM Alaska State Office Division of Resources Branch of Energy and Minerals 4700 BLM Road Anchorage, AK 99507 Office: 907-267-1469 Cell 907-301-8972 Fax: 907-267-1304 Home: 303-807-3161 tzelenka@blm.gov 424 EtiPLORATION~ NAVAL I'ETROLEUDi RESERVE NO. 4, A•%A, 1944-53 J/ ing data obtained in drilling the four test wells; much of the information is summarized on graphic logs (pls. 29 and 30). Data were compiled in part from informa- tion obtained by Arctic Contractors, who drilled the test wells under contract to the U. S. Navy. Additional data were furnished by United Geophysical Co., Inc., the Schlumberger Well Surveying Corp., the National Bureau of Standards, and the U. S. Bureau of Mines. Surface and photogeologic snapping was done by geolo- gists of the U. S. Geological Survey. Survey geologists also described the cores and ditch samples, made micro- faunal studies, and determined porosity and permeabil- ity in the Survey's laboratory in Fairbanks, Alaska. Microfossils and faunal zones were determined by Harlan R. Bergquist, and the stratigraphic distribu- tion of fossils in the test wells of northern Alaska will be presented by him. Invertebrate megafossils were identified by Roland VV. Brown. The heavy-mineral data are part of a regions] study of the heavy-mineral zones by R. H. Morris. The help of many other engi- neers, geophysicists, and geologists connected with the above organizations is gratefully acknowledged. trending anticline, about 75 feet structurally lower than tho apex. The anticline is on the south flank of a struc- tural basin outlined farther east by the Umiat and Gubik anticlines and to the west by the Ousnalik anti- cluse. Regional surveys by United Geophysical Co., Inc., in 1947 show that the observed gravity decreases westward in the vicinity of the well. The area is also underlain (according to an airborne magnetometer survey made in 19456 by the U. S. Navy and the Geo- logical Survey) by the northwestward-plunging end of the largest magnetic anomaly in the region, the center of which nearly coincides with the crest of the Umiat anticline. Sandstone beds in the Tuluvak tongue of the Prince Creek formation which contain has at the Gubik field (Robinson, 1958), and sandstone beds of the Nanushuk group which produce oil and has at Umiat (Collins, 1958), are nonpetroliferous in this test. Formation tests were inconclusive because ice formed in the testing instrument; but two gas-bearing sandstones in the Sea- bee formation, a~~;S7~~eet~~and~;$~~~ , 0 eet, are e to 58 SQUARE LANE TEST WELL 1 Approximate location : Lat 69°34' N., long 153°18' W. Elevation : Ground, 324 feet ; kelly bushing, 340 feet. Spudded : January 26,1952. Completed : April 18,1952 ;plugged and abandoned. Total depth : 3,987 feet. Square Lake test well 1 was drilled to test Cretaceous rocks on an anticline defined by United Geophysical Co., Inc., by reflection seismograph in 1951. It is about 145 miles southeast of Barrow on the north edge of the northern foothills section of the Arctic foothills prov- ince. The area immediately surrounding the test has less than 50 feet of relief, and the region north of the well is flat, marshy, and dotted with lakes connected by snsall meandel•ing streams (fig. 34). A few miles south and east of the test, low hills rise about 500 feet above the lowland. The coastal plain is mantled with marine sand deposits of Pleistocene age, and Upper Cretaceous rocks crop out in the hills. The location of the test well is only~~~.rosim ~at.e. n,S 1tS later longitude were not accurately established. The loca- tion of the site with respect to the seismic lines run by United Geophysical Co., Inc., has been carefully deter- mined, however; and the hole is correctly located with respect to the structure contours on figure 34. Beds dip gesltly away from the crest of the anticline, and contours drawn by United Geophysical Co., Inc., on a seismic horizon at a depth of 3,000 feet show a vertical closure of much more than 200 feet enclosing an area, of about 24 square miles. The test well is on the northeast side of the east- Both STRgTI(iR9PHY The following gives the depths at which the strati- graphic units were found in Square Lake test well 1: Depth (feet) 1 fi-25_ _ _ _ _ _ _ _ _ _ _ _ Gubik formation. 25-700___________ Tuluvak tongue cf the Prince Creek formation. 700-1,885_ _ _ _ _ _ _ _ _ _ Seabee formation. .~_ 1,885-2,475__________ Ninuluk and Chandler formations, un- differentiated. 2,475-3,987__________ Grandstand formation. The well spudded in a thin mantle of alluvium com- posed of well-rounded sand and gravel made up of clear, white, and yellow quartz and black chert. In the first sample, from 30 feet, rocks from Cretaceous strata as well as surface material were recovered. In this well the Tuluvak tongue of the nossmarine Prince Creek formation (Colville group, Upper Cre- taceous) underlies the alluvium. This sequence of beds is composed primarily of sandstone, with some shale, and is characterized by a large amount of bentonite and some coal. The sandstone is light to medium light gray, silty, and micaceous and commonly has a very bentonitic matrix which makes most of it impermeable. Carbonate minerals, which are probably cementing ma- terial, range front 0 to 30 percent; in some places the amount changes abruptly. The very calcareous parts are lighter gray than the noncalcareous ones. Most of the rock is impermeable to air, and the effective paros- ~ • ~/3 444 EsPLORATION OF NAVAL PETROLEUM RESERVE NO. 4, ALASKA, 1944-53 1,879 feet), was sent to the National Bureau of Stand- ards and analyzed by S. Schumann as follows: Component dfoE percent Gornponent Mot percent Helium_______________ None Oxygen________ _______ None 1liethane______________ 99.3 Carbon dioside_ _______ .11 Nitrogen______________. .40 Propane_______ _______ None )Jthane_______________ .18 Butane________ _______ None V4rater samples from formation tests 4, 5, and 8 were also submitted to the U. S. Bureau of Mines. Analyses of samples from tests 4 and 8 are presented in the fol- lowing table. The sample from test 5 was largely drilling mud; and the small amount of water separated from the mud had a chloride content of 1,600 parts per million (equivalent to 2,600 parts per million of NaCl), and a specific gravity of 1.001. It was not analyzed further. Analysis of water from formation teats ~ and 8 in Square Lake test weld i iAnalyses by the U. B. Bur. Mines] Farts per mllllon Radical I Test 4 (1,696- I Test 8 (3,033- 1,676 feet) 3,067 feet) who served as warehouseman and storekeeper. Others, such as carpenters, laborers, 1 welder, 1 radio repair- man, 1 electrician, 1 cement and formation-test techni- cian, and 1 Schlumberger engineer were sent from Bar- row or Umiat as their services were needed. Housing.-Twelve wanigans (small one-room build- ings mounted on skids or runners to facilitate moving) a.nd eight ja.mes~~•ay huts (jamesway buts, which are similar in shape to quonsets, are made of canvas over a metal frame, and are usually slightly smaller) were used for shelter. The wanigans housed the boiler, the geologist's of5ce, the shop, the Schlumberger equip- ment, the generator, the cement pump and motor, the lavatory, and cement, water, food, and miscellaneous storage; one was used as a utility room. Five of the jamesway huts were used for sleeping, 1 for a kitchen, 1 for eating, and 1 was both a dormitory and a store. VelticZes and heavy equipment.-The camp at Square Lake test well 1 was equipped with 2 weasels (military vehicles, fully-tracked), 1 DS Caterpillar tractor, 1 TD-9 International tractor with crane (cherrypicker), and 1 swing crane. One of each of the following major items of drilling equipment was used by Arctic Con- tractors: Calcium____________________________ 34 12 Magnesium_________________________ 36 6 Sodium_____________________________ 2,960 1,020 Carbonate__________________________ 64 51 Bicarbonate_________________________ 1,260 2,400 Sulfate_____________________________ 29 23 Chloride____________________________ 3,900 140 Total solida___________________ 8, 283 3, 652 H,S detected__________________ None None Specific gravity at 15.6° C__ _ _ _ 1. 005 1. 001 LOGISTICS About 1,350 tons of supplies and equipment (includ- ing the Cardwell drilling rig from Titaluk test well 1) to drill Square Lake test well 1 were hauled to the site on sleds by 3 tractor trains in late 1951 and in the spring of 1952. Personnel was flown in by bush planes which landed on the nearby lake using skis in winter and floats in summer. Information in this paper about personnel, equip- ment, and supplies has been compiled from data re- corded on the test well by Arctic Contractors. Perso~anel.-The supervisory staff consisted of 1 drilling foreman, l petroleum engineer, and 1 geologist in charge of drilling the test. The rig crew consisted of 2 drillers, 2 derrickmen, 2 floormen, 2 firemen, 2 heavy-duty-equipment mechanics, and 1 oiler and small- craneoperator. Other men permanently employed were 2 cooks, 2 cook's helpers, 2 crane operators, and 1 man Ideco standard derrick, 87 ft high wtth 24-ft base (mounted on runners from an Athey sled). 120-ton Ideal type D-12 crown block with 8ve 34-in. sheaves grooved for 1 in line. 120-ton Ideal type D-12 traveling block with four 34-in. sheaves grooved for 1-in. line. 125-ton Byron Jackson type 4125 Triples hook with bail Ideal type FD 171/2-in. rotary table. 150.ton Ideal type D swivel. Cardwell model H drawworka, skid mounted, complete witb cat heads and rotary-drive assembly. Caterpillar diesel engine model DS800 on drawwm•ks. Ideal type C-250 power dnplea slush pomp, 7>~ by 15 in. General Motors quad diesel engine, model 24103, series 871 on slush pump. Shaffer double gate blowout preventer. 80-bbl. divided mud tank. 35 bp. Kewanee boiler. Halliburton cementing unit. Schlumberger automatic recorder and deep winch. Fuel, liubric¢nt, and water consumption.-About 83; 600 gallons of diesel fuel and 2,030 gallons of 72-octane gasoline were burned to furnish power for drilling the test; lubrication required 456 gallons of lubricating oil, and 420 pounds of thread-lubricating grease. Water used in mining mud and for other purposes totaled 554,200 gallons. DRILLING OPERATIONS DRILI.INCi NOTE6 Information presented in this section was reported by Everette Sl:arda, petroleum engineer for Arctic Con- tractgrs. • • ~~3 TEST RrELLS, S(ZUARE LAKE AND WOLF CREEK AREAS, ALASKA ~Jr Notes from drilling records Depth (jut) Remarks 21______ ____ Bottom of cellar. 110_ _ __ _ _ _ _ _ Cemented 4 joints of 13%s-in. 54.5-1b range 2 grade J-55 seamless casing at 110 ft with 85 sacks of Cal-Seal. 713_ _ _ _ _ _ _ _ _, While reaming the hole at 713 ft, mud was lost at a rate of 30 bTl per Ir. e ac~C i ion Jelflake and Fibertex did not stop the loss, which was then traced to a washout behind the casing. The washout may have been caused by heat from the drilling mud which thawed permafrost behind the casing cement. The casing was recemented with 35 sacks of Cal-Seal and 10 sacks of High-Early cement. 728_ _ _ _ _ _ _ _ _ Cemented 728 ft of 10%-in. 55.5-Ib Hydril stream- lined casing with 160 sacks of High-Early cement. Installed blowout preventers. 1,087___ _ _ _ _ _ A sledge hammer dropped in the hole was recov- ered with a Globe basket. 3,987_ _ _ _ _ _ _ _ Four cement plugs were set in the hole through open-end drill pipe to seal off the gas-bearing sandstones and to protect them from contami- nation by water-bearing beds. For the first one, 80 sacks of High-Early cement were dis- placed at 2,935 ft, with the top of the plug at 2,745 ft. The next two were set between 1,865 and 1,934 ft, and from 1,640 to 1,840 ft. The top plug, at 700-741 ft, was set through the lower end of the casing. The hole was then bailed down to 225 ft, the blowout preventers removed, and a 10~-in. nipple welded to the top of the casing, 1% ft above the ground. DRILL AND CORE BITE Reed conventional Kor-King bits were used to core 1,043 feet of hole. Of the bits used, 10 were type K-25, soft-formation bits, and the rest were type K-24, hard- formation bits. The first 6 bits were 614- inches in diameter, but the others, except 2 used near the bottom of the hole, were 7~-inch bits. About 92 percent of the rock cored wa.s recovered. Drill bits ranged in size from a 17~-inch Security hole opener to a 9%-inch Hughes OSG3 rock bit. The latter was the host common type of bit used, but a few Smith DDT and Reed type 2 and 2C rock bits were also used. On the graphic log (pl. 29) drill bits that alternately reamed and drilled short intervals are shown only as having drilled these intervals. DRILLING D1UI) Desirable characteristics were maintained in the water-base mud used for drilling Square Lake test well 1 by the use of Aquagel, Quebracho, and Baroid, with a small amount of tetrasodium pyrophosphate and caustic soda. At 713 feet 4 sacks of Jelflake, 2 sacks of Fibertea, and 23 sacks of Aquagel were added to the mud because of loss of circulation, befol•e the mud loss was traced to a washout behind the casing. At 2,779 feet, 50 barrels of-new mud were mixed because some had been lost when the plug was dislodged from the mud pits. The following table pi~sents the character- istics and additives of the drilling mud used in drilling the test. Drilling-mud characteristics and additives, Square Lake test well 1 Depth Weight pb per cu ft) Viscos- 1ty (Marsh tunnel sec) taster loss (cc per 30 min) Tem- pars- lure (° F) Aqua- gel (sacks) Que- bracho (]b) PyTO- phos- phates (lb) Othar additives 110 67 34 _____-- 70 18 ------- ------- 266 7b 36 10.6 80 2 25 25 462 74 46 8.7 65 11 100 60 b90 70 37 6.5 b8 _.-_-- -__--_. __°-__ 669 73 40 7.2 b4 7 b0 _______ 713 -------- -------- ------- ------- ~ ------- ------- 4 sacks JelBake, 2 sacks Fibertez. 728 74 48 8.9 54 28 2b 500 750 85 8T b.8 71 _______ _______ _______ 160sncksBarold. 1, 065 84 b4 b. B 77 _______ _______ _______ b lb csustio sods. 1,077 82 b0 8.3 65 4 _______ _______ lb sacks Baroid. 1,175 __------ -°----- ------- ------- ------- 25 ------- 1, 200 &5 b4 8.3 73 ------- ------- ------- 1,312 65 59 5.6 7b _______ b0 _______ 1,435 86 b8 b.0 7b --__°_ _°_°_ ___---_ 1, b00 85 54 b.0 72 ------- ------- ----°- 1,810 83 65 b.0 7b _______ b0 _______ i, b7b 86 60 5.0 84 _______ 110 20 b Ib sodium bicar- bonate.'e~~A 1,714 88 b2 6.3 b4 _______ _______ _______ 48 sacks Bsroid. 1,760 SB 54 5.0 60 _______ _______ _______ - - 1,830 88 b4 6.3 84 ___-.-- -_°__- --._-__ 1,860 87 b4 5.0 63 ----°- ----_° ---.-_- 1,900 88 b4 b.0 80 -_-__.. ..._°- -____-- 1,925 88 b5 b.0 58 -.-_-__ -___°_ ---__-- 1,980 SB b6 b.3 68 -----° ------- ------- 2,050 88 6b 8.3 67 ;5 25 _______ 15 16 sodlam bicar- borate. 2,120 86 64 6.0 78 _______ - ______ ------- 2,200 88 56 8.0 76 _______ _______ _______ 2.295 87 65 5.6 76 ---_-° ------- ------- 2,383 SB 67 5.8 73 ~______ 60 _._____ 2,493 87 55 b.8 76 _______ b0 20 2,585 87 53 5.2 79 _--_-.- _°--° -_--_-- 2,627 88 b9 5.3 79 _____ 2b 15 2,670 89 54 5.5 76 _____ 75 20 2,741 87 56 5.3 72 ____.__ b0 _______ 2,779 __----_• -------- ------- ------- ---_-- 100 20 72 sacks Baroid. 2,808 91 5b 4.8 75 _______ _______ _______ 2.850 92 54 4.8 68 ------- ------- ------- 2,928 92 b5 b.0 64 --.•--- ------- -----° 2, 995 92 54 9.8 7b ~4 100 20 10 lb caustlC soda. 3,068 92 54 5.0 85 -_-__.. ___--^ ----^- 3,100 91 b5 b.0 70 _°---- ------- ------- 3,192 91 68 4.8 7b _______ _______ _______ 3,210 91 57 9.8 84 _______ _______ _______ 3,250 91 56 4.6 65 ------- ------- °---__ 3,276 91 b6 9.4 83 ____ 355 90 351bcaustlcsoda. 3,340 91 54 4.3 69 _______ _______ _______ 3,388 Ol 6b 4.5 68 _.-°-- ------- ------- 3, 395 91 53 4. 1 66 ------- ------- ------- 3,450 91 b2 4.3 74 _______ _______ _______ 3, 507 91 b4 4.3 74 _______ _______ _______ 3,515 91 52 4.6 64 _____ 125 20 IOOIbAeroseal. 3,580 91 55 4.5 TO _______ _______ _______ 3,602 91 52 4.4 70 _______ _______ _______ 3, 640 92 55 4.3 70 _____-- ----°- _----- 3,682 92 53 4.3 73 - ------ ------- --°-__ 3,713 93 b8 4.4 74 _ ______ _______ _______ 3, 790 92 b0 4.2 73 _ ______ _ ______ 55 37b lb Aeroseal. 3,755 91 50 4.1 fib _ ______ _ ______ _______ 4016 musticsoda. V-A Page 1 of 1 Maunder, Thomas E (DOA) From: Maunder, Thomas E (DOA) Sent: Friday, January 08, 2010 1:24 PM To: Foerster, Catherine P (DOA) Cc: Colombie, Jody J (DOA) Subject: FW: Square Lake Test (100-116 -- 50-119-10007-00) FYI. -----Original Message----- From: Maunder, Thomas E (DOA) Sent: Friday, January 08, 2010 1:22 PM To: 'Greg_Noble@blm.gov' Cc: Zelenka, Thomas Subject: RE: Square Lake Test (100-116 -- 50-119-10007-00) Thanks Greg. I will look forward to Tom's reply. Tom Maunder -----Original Message----- From: Greg_Noble@blm.gov [mailto:Greg_Noble@blm.gov] Sent: Friday, January 08, 2010 11:33 AM To: Maunder, Thomas E (DOA) Subject: Re: Square Lake Test (100-116 -- 50-119-10007-00) Tom, I left for extended leave shortly after I reed this e-mail. I've asked Tom Zelenka to look into what we have and have asked him to help you out. He is out of the office until the 14th but should be getting back to you shortly after he returns. Just wanted you to know I wasn't ignoring your request. Thanks for your patience. "Maunder, Thomas E (DOA) " <tom.maunder@alas ka.gov> Greg_Noble@blm.gov To 12/11/2009 01:23 PM cc "Foerster, Catherine P (DOA)" <cathy.foerster@alaska.gov> Subject Square Lake Test (100-116 -- 50-119-10007-00) Greg, The Commission is examining a number of the files for legacy wells in Alaska. Regarding Square Lake, all we have in our file is a copy of USGS paper 301 (~31 pages) which thoroughly details the geologic assessment, but offers no operational (drilling/casing-cementing/plugging) information for actually drilling the well. Does the BLM have such operational information? we would appreciate a copy of what you might have especially relating to plugging the well. Thanks in advance. Call or message with any questions. Tom Maunder, PE AOGCC 1/21/2010 . . FonD. 9-593 (April 1952) UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY CONSERVATION DIVISION *' Sec. _________ , , : I I , , ' -----"1----,.-----1------ . . ' , . ' , . ' -----·:----i------i----- : : : _____.L____.!._____f._____ i ¡ ! : ! ! T. ________________ R. _______________ INDIVIDUAL WELL RECORD ________________________ Mer. ~ N.P. R. #4 Land office _________.._..__ ... Date___Æ~_'J"__~..9_'_~L____ Ref. No. ____________ State Alaska ------ Serial No. ______~__________ - O~1]'1i7 ------- Lessee _____________~_____________ Field _____Sq;'ª'rfL.L&k.41LArea.______ Operator _~..L...Þ..YM- District West Coast Region -----..---..---- Well N o. ~-~~~_.::_~~__~~~__~~g__t.1:____________ *' Subdivision _m_______________________________________________ * Location -~j;.!"_§9_~.14_~__I!_'--ltf!IlK!_.1.j..3..~_i~~__ìl.L_t.pp_~~!_1-------__________________________________________ Drilling approved ____________, 19_____ Well elevation __ R._t.L..._______________ feet Drilling commenced ____J$n .~_____, 19 52t Total depth __.3.2.L______________ feet Drilling ceased __~r~¿8 ______, 19~__ Initial production 11.2 MClI' /k. Completed for production_________, 19____ Gravity A. P. I. Abando~-_----~i1---1., 19_2~__ Geologic Formatious Surface Lowest tested Initial R. P. Productive Borizous .Depths Name Contmts --------------~ .------------------ ____..1________________ _1-_6J:!._º-=-.l_Q.1.5____ _~ªl~_:'_~_~_______ ___G.ªª-_________ WELL STATUS Gas -------------------------------- ----.. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SIIIPT. OcT. Nov. Dlllc. PGW ---~~~-- __!þ!"g_!_ __!þ!"jJ.!_ __JiÆß.~_ AB1} . ---------- --------..._- --------...- ---------- ---------- ----------- ----------- ----------- ------- ------------..-- ----------- ----------- ----------- ----------- ---------- ----------- --------.._- --------..._- ----------- ----------- ------..--- ------ -------------..-- --------..._- ----------- ---------- ----------- ---------- --------.._- --------..._- ----------- --------.._- ----------- -----.------ -..----- -----------..-- ---------- ----------- ----------- ----------- ----------- ----------- --------...-- ----------- --------....-- ----------- ---------- --- ... -------..------ --------...._- ----------- ----------- ---------- --- -------- ----------- --------...-- ----------- ----------- --------.._- --------- -- * Unsurveyed REMARKS__________________________________________________________________________________________________________________________ -----------------------------------~--------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------..-------------------.,.----------- -----------------....-------------..------------------------------------------------------------------------------------------------~--- Geol_çg!_ç&t_~e.Y_I1:Q.t~.!J_@I.~º~_~g~~~_~¡_______________________ ---------..------...-------------------------------------------------------------...---------------------- Il1Æl;:( U. S. GOYERNMENT PRINTING OFFICE 16-38051-4 SQUARE LAKE TEST WELL NO. I PLEISTOCENE Gubik Formation: 161-251 CRETACEOUS Prince Creek Formation, Tuluvak tongue: 251-7000 Seabee Formation: 7001-18851 Ninuluk & Chandler Formations (undiff): 18851-24751 Grandstand Formation: 24751-39871 . . RESTRICTED FOR OFFICIAL USE ONI,'( U. So G·1f.CWG!CAL SURVE'l Navy 01J. Unit Labomtor,- Fa.irbaDks~ .A1Askä COpy NO'~$,~ , .........lSá...... SQ,UARE LAIŒ TEST 1-TELL NO 0 1 ,'. Sque.re Ieke Test Well Hoo 10 a.t approximately lata 69° 34~ 22tj Noo long.., 1530 17u 49" Via (í::tua.dmngle H-13), 'lASS located on the ba.eia of :photogeology and seismic surveys ~ although the presenoe of an a.nticline had bean 0uggQ9sted 'by oo.¡>l-~ 1er reconnaissance aurfaoe 'WOrk.. liThe Souare IÐke a.nticline 19 gently folded, be.ving dips of 2 to 3 degrees on the nor'~h and south tJ.äDkI! <> The vertiœ.l closc.- ure~ based on seismograph da.1;a,. is appi'ex1œta17 300 feet a.t e. depth. ö:r 3000 feet" The a.rea of closura is a.bout 24 sqwre mllsso . ",The Square lake #1 111 sltœted on the north flank of the str"UCture a.bout 75 fast lower than the s;pu,,? ~(a.nd) tø dSBlgned to test the oil and gas possibilities of the strn.cturs at- lsäst to the a-ppro:dma.te depth of the lowst oll=bearing horizon of' tha tïm:tat f1eld~....:: (~tat1on from the Drilling Programe Sq~re Lake Teat Well NÒol~ S£þtamber 14~ 1951\1 by C.. L. Mohr..) The well spudded on .7anua.ry 260 195211> and ,,¡as a.ba.ndoned on April 1St) 1952, hs.v1ng encountered no commercial shows" Some gaE f'lowað. :from M>nd3 at 1646 ß to 1775' and 18478 to lem~a~ but salt -wa.ter 'WaS recovered from ltflßv 'to 1~7qo and fresh -.ter from »33 ij to 3067 D: fluid recovered from lo'War bltervali! te8 tad was drllUng mud" A 8U\111!61'7 of drill stem tests 1ß given belo'Wc Su.:.d."ø.CÐ Cäl5mg WIos eet at nO 99 and 1O=3/4Ç! caa1ng at 72gQ.. Correlations given below are based largely on microt©seU t~etam1na.tioJlt!l made by Harlan R... Dergq,u18t: the lithologic dasc:dpt ion 1!!J 'baß'9C"l. \.In the e:ø.m1na- tion of corea and well cuttings, the electric log~ and tb@ Pe;trcliS'W'il Eng1ueer0s Report " Only a thin mantle of Gubik (1) (Pleistocene) sand and ~~;ra,'n~l 19 prsoent a.t the weJ~l s1te~ the first sample reco"'Gred~ from 30 íi. conta,1neod ~l and benton.- itic shale from ZODe G (Colville Groupe ~per Oretaceous) ~ as well Rß ÐUX'fe.o~ materml" 1'he fint 7000 of Zone G sediments are iv.terbedded &~dstona 'and ~b.ale with thin bsdø of bentoD.ite~ there are a.180 streaks of ooal in the 'I.xpp!'>1X' half of' thb e8ct1cn.. The sandt/! a.re fine to medium gramedD but a ver:r bento:oJ:U~ matrix ma!teø most of them impermaa.ble.. The carbonate content" whioh :b p:rooob17 an addlt10Dal cementing materia.l~ varies Coften abruptly) fl'6n! 0% to 30% elf th~ rock" The very œlca.rsou8 sections are lighter grB.7 than the nonœlcareo'lQ'.a in"~ tervaJ.ø.. Ðelov 100 g tbe aÐction is composed almost entirely of' medium light g~r ole.)" shale and siltstone3 some of which 18 bentonitic 0 N@ bedm ~f ea,Jlt'¡Ii!'i¡one are encountered for 3~ ijo At 1090Q. the bottom of a. 5O...too1; b0d @:t B~nt\.tOfAe (with Dome :1nterbedded clay in the upper part) proba.bl;r marks tb,¡g 1tìa~e of. the sectiou.. Although it laoks d!agno~tlc fouilsD th19 mtel~l :La ältB@ phN!ð. in Zone G 'because ita bentonitic, light colored shales\) and tile bentonitic 2ð:l':.\d- stone at its base seem mere elose17 allied lithologiœlll' with the upper 06etl011 than \'lith the dark: gra:r~ barder sbaleB "below.. Colville Grot4p microfossils ar~ rare throughout the ~ne 0 \\lP 0.1 \,0 e . The upper Goo J of Zone F (Colville Group I' Upper CretatH~o"UI) ~ which dl:rsotl¡.' u:nderlles Zone Go cone18te of medium &uk gray clay abal~\'t with m!nol" äŒðunta of' 811tøtone and a faw thin bentonite 1.9.yers 1n the upper 100 9.. Z·one F mlo1'0100911e are common, as are fish bone fragments and Inoceramt:.8 priøml..'rhe lo't<ler part of Zone F contains e. thick ftn.e to medium gra.1ned 811t1 sands ;bi~h 1I!J non= tQ very calcareous, with good to poor porosity and permeäbiU.V., A fä1n.t oil stain Wð.ß noticed in some corosQ and a. drill stem test resulted in a Bt:roùg blo", of gal~ The be.S8 of' Zone F at 1983 , . is maIked by ä l~5-foc;t bed of fine to very 'tine grained calcareous a.a.ndstone" An a.bundance of the foraminifera ge.udr.1'~ A and. T1'Ocþamm~ F in the shälea 1mmedtate17 belo\>, the 8e.ndeton~ 1nd.lœte the preiSen.ce of Zona DE (Nanueh'ttk GroUp, Lower (t) Cretaceous) aed1ments. A oue=1nch conglomexate of very well roundðd black ohert pebbles (up to 1/4" 1n diameter) 1.8 preeent a.1; 199430 it it overlain by a. one-meh bed ot clay irons'tone.. The 'Upper 50 ~ of the Nanu.shuk Group MS .0'9'8ra1 thin. sändttonel; they are more arg11laceou8. micaceous" and œ:r'bonac&..)U$ than tbe overly1ng Zone F sànds.. The next 250 9 is dom1Dantq shale" but from 215CP to 250Qn thin sandstone beds are common~ Crossbedding if!¡ 1'1'88e;'1.to and I'IB'Wir4~ bedding and mtrsforœ.tlonal conglome:ra.tea are also rapre8en1jed~ though theya.m ra.reo The claystone 18 silty. micaceous" medium da.1'lt gray ~ and no:nœlcareou.8i) with little or no sha.1Jr cles:$ge~ It u!!tally œ! laminäe ot siltstone and Band- 8tone.. CarbonaCe0119 laminae and œrbonizedplänt fragment!!! a.re present in both aa.ndetoné and shale" ~udz1:i¥' A and Trochamm1na. F a.re common ,'mly froM 1883. to 1910 8 " They are very rare to 2340 q 11 and from 23lto 1 to 2~193' the ve'17 rare m1crofe.œa. bas a, few Specimen. of other a.rens.ceou8 species a.s ~sll.o !l:htl! m1cl'O= t'äun.äl distJ'1bu.t1oD, suggeste that the GaUlÙ'1na-Trochamm::WaZone 18 rçre8œnted only by about 50· of led1men1HI; and that there 18 M98Sentiall.:v barren SOile of a.bout :OOJ i1U11ed.L"\.tely below it, thoush a sbarp bounàa17 œ.DJ1¡-gt b!! draw b&- tween the two lIonG8 > Core 41 at 2493='2~50 ñas the Øt;vpica.l yemeu11Û!Oid8!! F fauna./f fou:o.d. in Zone .Be of the .l!.I.wuna. anticline" This ta:u.na.~ though it varies in e.bunðanC80 ia present to thé total depth: the bottom hola 0;0 re 0 at 397g-39ß7\'p contains & representat iveassemblage.. La.evldenta11um is alao present belCHt .3g25 00 The lithology of the "tTPical .Vemetiil1no1deø F faunatt zonES h ve'17 s1m'.läl' to tb.a.t in the ea.me ~one (approximately 19OO ¡) to 3))00) in TitAlmTest Well NOolo The 11rst 500 ~ consist!! of interbedded thin \Sandstones a.nd shale.. Ji'rom 2800 G to the total ã.epth are ma.ssive eandstones, 20. ~ to 120 g thick, separate,'), from 0116 änoths:t' by ßha.l:;r intenala ~ich otten contain thin sa.ndstone beds" The sands tare fina to V&r:! f'1ne grained!) øllgb.tly sUt7 and often calœreoutl in thi'3 upper pa.rt,) be-· CODU.ng finer gminede very silty and arg111a.oe0I1S~ a.nd noncalca~"80uß with depth" while POros1t7 decreases do'Wft\\Grd from 12% io rÞø and permeability from 6 liiilli:.. œrc¡r8 to tmpermeablso Fa.Últ oil s1101#8 in æands betvee:ll 3000 & t\nd 3300 Ii p1'@du.clad only drilling mud in drill stem teets" CrolJ:S bedding~ œ.rboñacti1Qul pa.rt1~fJ~a.nd :rare intervals of "øw1rl.ya bedd:tng are presentc Sect10ns offnterlamb1a.ted claystone and I8ndston8(1 with sharpo irregular contacts that 1n 801118 œS88 r~ øsmblø ripple marksø and eommon intrstormat1ona.l conglomere.tes~ 9ugg~!8t that mUCh of the sediment __ deposited in shallow ~te%"" (.SI. øingle la~er ot rounded light and dark chert pebbles l/sft to 3/4n thick 18 present at 3836 a and 18 the only cCUlglomerate 1n th1e section that 18 notoompoaed of'8hal& f~g¡,':Ienta ) o. 1'119 absence of' p7%'tte also suggests a well aerated en:vlromaent ~ Which \«1uld be more l1ke17 111 shallow _tar that on. _8 emu'nod by _ve..? . Strata th:roughout the weU are flat17:h\g" 2~ DeE~ 16)~l615 ' 19lt1=lS793 lf578-1S973 3033-=3067 a 311.66- 3)~ 6 3714- 37'-12 3 3g34-3s45~ 3g;o- 3gg3 q £or! 23 25 26 26 31 32 44 411- 4; 45 46 49 l!9 50 ;0 52 53 53 55 55 59 63 6~ e . smJL~[à..11.Y OF DRfLL S'::~E~î trEm: s ~ ~ Recoveq Open 106 minutes, flo'W-ed estimated 112..5 mef. gaæ;e then made salt \Ø.ter by heads.. Bottom hole flow presstLre 425 1b" per Ðq" in(, Open 70 mi:mtes, strong blow ga9~ (eat.. 1000=;000 mef')" produced salt i~tel' after 30 minutes" reoovered 20 gal.. water cut mud. Bottom bole pressure roo lb" ~ flowing pressure 500 lb" per sqomo Open 60 m1n.utes, closed in 12 minutes, recovered 90 9 Balt water; flow pressure 'Zero.. . . Open 90 m1.:¡'l.utesfI closed 10 minutesø recovered 7SO 0 fresh _tar" Open 103 minuteD, closed 15 m1nute5~ recovered :20 gal" drilling mud.. Open 111 minutel!, closed 15 minuteo recovered. g ,gä-1Q drilling mud", Open 93 minutes, reoovered 5 gälo drilling mud~ Open 104 minutes closed 15 m.inu.tes recover-ad 100 ~ slightly 1I$ter=out drilling mudQ TEST FOR OIL g,rAIN IN 0014 pept~ 1662 1102 1116 1133 1845 1S73 ~30 ;OlD 3050 3062 ;090 32lK) 3251 3263 3277 3481 3497 3503 3550 3551 3755 3810 3812 Cut Residue vary- pale yellow , ~I It pale stra'A « ~ n re « tI II ti None et ~ I'i ii none !I tl " very pale atraw.-colored DOne II t! n pale a tra. \.¡...co 10 red none very p&J.la yellow none "1'ery faint greasy stam n It It !I It It It !! pale yeUi.lw very :f:äw.t ~re:e.sy stain very fa1tri: greasy- stain r; fI fg II none It t3 ~ pale yellow 11 (t tJ tt If n It ff IS I; ~ Ii II n ver¥ pale BtM'W « n fa yelJ.¡¡¡¡t f 1'1 3· " ~Ol·~ 2 2 5 5 7 9 9 10 10 11 12 12 16 11 22 23 ~~ 21~ 25 25 26 26 27 31 31- 32 32 33 34 35 35 ~ 44 44 l¡4 >'14 44 44 44 44- 41{. ~5 45 46 4Q J 49 :D ~ 51 ;1 52 (53 ~;J jf;~1~ é' :Dao t h .,.... 2"H? 247P 514 525 5'16 611 627 632 641 661 5·,,~ ,. "'- 6tn -' lo6:;p loG1:? 1646P 166æ lb7l? 16g5P 16g-;yp 1 699? l'?OEf' 1123P 1133P lJ1K:}p 19l~5P l~ÌiP 186;p lß13P lS50P 1916P 1927P 1931'.P 2200P 30 »P 3028 3032 3034 ;036 3035 30 1¡0? ,:> 42 3044 )ì 46 -;O~P 3062P 3090P "";:). ~'O';::> ,,,,-~i I" 3251P 3263 3217 3411 3400 3481 3!~91 3503 3514 e Rfi''''...·!> i~>','" 't,;,,,,,,,,F>. '" '~+'''il ~..=....~~-~~~" 15,,5Þ 12Q4 15~1 9&4 14.3 21.8 1~9 23·2 10,,9 18,,2 17.) lL1 15~4 L6 1801 11,,6 lO~3 18·3 ro . i~ 18,,8 00,,2 17,,9 16cl 1};>3 11",0 1395 11·ol! 16,>!~ 11·,9 17,,5 13,·6 lLl .3~5 12,,52 11·,,0 12,7 12~g 13,,3 13~3 12,,94 15<>2 13,,6 :1108 12" 5).. 6,,22 SQ6ß So3g 9,,6s 709 g"S 706 12'07 10,,7 8,,; 4,,1~ t, "'" P",,,,~,,"""'1"-'" 'i i't'V :.:-~,:~....~~~:!..~~ :Û1~!H3:%'me.~b 113 impe1'mea.ble 1mpemea:~1.0 impemea.blø 9 mdu 54 md." m-rpemeabl" - 11 md~ 1.mpe:tm~1)1t\J impGIm_blfi imp e:rrtJeß,b 1 €;!I :impermeable 12 md. 1mpermeabl~ 20 mdo 1.rupsmæblè le~~ t;han 1 m(Lq 215 mdo }:1 md~ 43 mdo leli3¡;¡ than 1 m¿L 31 md" 14111d" lS®€ð than 1 llHlo no þltig; leas than 1 md" no plug 11 mil" no 'P lug 6)..¡.5" md.( o;ff),cked) 1035 mci.. i>11psmeable iJnpema:a.blô .3, 33 md~ lasø than 1 DlcL. no pl~ 1~5 mdü rl ~6 mcL no plug :L7 3500 m;9.ò 6.4 m*", l.,6 mð.~ l~" 1 6.75 lef,'ß than 1 !1~dj lesß thian 1 rod" 1mpaœ~blø i1npem~l.;lÐ It lails than 1 mdo lmperm_ble ¡w n rI 4.. . S:~r~}~\g~3. ~t~. . C·O!~l?~}~\~~~~;L~~J~:~ 'Y1 ~.<i' c::;¡ " J.p $~g8ntj~lly n~n=~lc~r~~~~ ~sj! f)nj¡ 1äll¡r l1.()~=Cälcar¡i:K)1t.§I ., '1' ðf/? J....j QJ!f.1 10025 ~!8 &1 en'" ia 11,- t.tOll:=OO lea. ¡'®¡1tìß IKì '0 8 e!B9sntially l14u'.\~t".al~l"~'M,)U@ 25·>6 e~ø~nti~lly ~n=cal~~r~~~ seBent~lly n~n=~ll[~reo~ eS38!1i. 14 :tally utu).·=œlr.ts-r;¡;Þ;>1;1.0 10 ./1 47,,1 13,,73 15 ,,6ß j.~)~45 ~(>g5 ~~ßsntia.ll;;;' :n.otJ,~,ælœn©u~ a¡¡¡~en t:!.àl~r !>lOn=œ;Lca1"~¡m~ e¡8 f¡ ~ t lELll~> w~n=~ :.ii.I~,~:re(,} Uti§ 12,,84 1705 6;sBent:lallj" oon~~œ~lcr:'r~~;i:i.t ro,,¡~5 t'H~sen,tiall: non~~œlœl'$o\UJ ~~!enti811y non-~~lcar&Ou~ $sÐ~n~~lly no~~ca.l~,re~ùB 6,,97 easentiall;r nO¡¡:¡~'"t.~lœ.Z"OOU.fB 15.10 241)5 25,,3 8 ~ 955{ n,')t ta~tad :I !'I ~ ~f II (t II %1 6~o4 not tï;j~tef!. ~ '-;-, W ft 5<39 go75 9076 \~HHHm t~~811¡' non~·œlca]:'ø{mß \!.Hlli3ent l:a.ll¡" æl~:)n-r.al'œreüul fJlilJf)!ltiall~ non=œlcarooii'ß G~ssn t:ltally oon=calcnreot1S 10,,61% ~Baentl~ll~" non=calcer~ouø ill 11 ,1 ff " !1! 37,,15% ~ Dfroth Effective Poro81~X .~1r ;Permea1l11~y -- 55 3550 901 im¡;H!!m_bl~ 55 3557 8·02 1$ 56 3596 1·3 t! 57 31011 10,,1 " 51 31:tg 907 n 58 3730 8,,9 " 61 3633 8,,6 r. 62 3s49 g~9 It 62 ~~ 9,,6 II 63 909 11 ~~ 3876 9,,5 " 3Sg4 102 II 64 3894 2'05 tI DETAIL1m LI!fHOIOGrC DESORIP'.UON 0- 1611 16 u_ ;C' ,:>4 30- 10 t 70- gO II 80...130 ~ 130=1l.!.Q · ll¡o=l50 e 15O-1Eo u 160-17CP 170-200 i ~ 1 200-212 g . . .2!rbo:nats Ccn~l;eut~~ b,:y' Wei~\t 9tJaentu,lly non<=œlœreo'\:'.t§ n u If II CI " II 11 " 11 u " a.pproXo f1$ essantt&lly non-calcareous ti II 11 ;: II If II t: K 8117 bueh1n.g to ground level" No sample. Sand e.nd gravølt ot well rounded clear, whita and yellow qua.rí~z a.nd b1Awk chert" Coal~ which is a.leo -present. 18 b1ack, shiny" 'With blocky frac.ture" A :few pieces of medium light- gray clay shale are slightly to ve" 3ilt71' micacÐOUSg nonce.lcareoUBe _lightly bentonitic.. Re.re cla.y 1:rOD.l!ltone 18 light )-ell()'.d,øh gre.l'.. 5ampleo down to So depth of 1.30 ~ contain ä large amoun~ of surfs(¡eJ gra...el~ thiø 18 not included in the description 'belowo Light g,rœ.7 bentonitic ala;?' shaleI' very tine gramed ängula.r iAhit.$ quart~ oand" Md coal" Clay shale a.nd mal 0 Clay ebale with some coal: small amount ot white V8r:¡ fme grained slightl;r bentonitic sandstone 1n upper 1090 Light gray cla.y shale and blackooaq cla.7 shalet) and aia.nd~toneo f1ne to madiœ gra1nedo ligh't gray" ben.ton! tiC. noncalcareous ~ veT¡' slightly mlœceoue" Clay ehalsp light {!;mY, benton1tic~ 11Onm1cacoous" no11= to !311ghtly silt;,,, Sandstone, very fine grained" light grs;1' II very olightly benton! tic" nou= calca.:reouBo with some cLay shale. Clay ehale~ medlœ gra7Ð very siltyI' nonbenton1t10. Clay 8Mle\) '!fIUh some white 'bsntoaUe ákld small amount b].s,ck shale" ~tž! Recoverx 5° 0" o Q9" Drilling mud -¡11th !¢I fraønenta of J1te1d.ium gmT clD.}'" abale o 92" Cos,l~ blaoke dulle with poor sha.ly to bl@dty cleavage. 004" Benton1tÐ0 gœ.y1sh white. argillaceouso with ve~· rare f; B 11 t-s bed flakes 0 f 'bio t;. 1;13 and coaL 004" Coale bJ.s.cko· dull to sh1nya shaly clss.'VSgeø with i~ bentonite ßS above in center of si!ction" 5c 212=220 !) 220=, 2 35 j e . cJ4Œ EGntonita~ light oliv$ g¡'~Y0 ysry argil1acaou~~ s11~~t17 calcareo~8 Coal a@ a:bova Interlambated coa.l i?nd 'black carDoMcSû;,;¡,:m 3ha.le Clayøtonse med1wn grayo very 'bentonitlo¢ sl ightly WftJIY lnetal' 0 non=œl<ea:reou.~ ~ Mi~rot~sails ab~ent" O=2~ 2'3'1 o fIgI'! Coal änd blao.lc shale" Sand!tona. fine grained" ligh.t graYe non'b911"1ion1tic~ nonœl:carst.i11,a" ~.~ P..!D:th 2 235-255 ~ 3 255=274 D Raco'Wsry 19 0 011 19o 011 5 $olt o i5" 49111 1~3" 4 ; 8ff 0'2" oa7t! Oð5~ 2 °9" o '2tt OD7" Sandfjton~" Usalte.nd pÐpp;;:lrffÐ ;1.~dlum gr.la.Ù1~d~ light medium graYÐ ¡¡¡lightly to vary œ,lcareous§ al1~htly argillac~ousø ma.!331V8~ with veT¡' :re.re coaly patchas. The sand. graina am Mgul:a,j,~ to ßubround white and clear qUBrt~ with some white and gray ohsrt~ and coal p;E\.rticle~. dark rock fmgm€nt18 andmlœ ßre rare. Etf~ctivð Air Carbonat~ Cr.¡ntent De"Dth P~r,¡)ßit~ rermea.þi1Hl ~ % By l'Íe~~ - 231 0- 15o~ LnpÐ%'m.eäble 29 ,lp E.\9.ndetonet. light graT tine gmmed" very 511ghtly œ lca.rso Ui'! I' argilla.ceotu'J" Sanddone àS in top of core~ medium gra1ned~ graJ.ing to fine grained with depth. Sa.nd8tone~ W~lt and pepper" at 9.òeJV8ø medium gra.1ned~ Sändatoneû finfJ grained. light g:r~;:l ø slightly to very œlœ.rl!toìuJ. 'With cO~1lOn fabt yell{n.,:i.sh. gray !llty ~ cälœ¡"oou~ etreak$ dippi!lg t',ppro:rdms;t,e1l 22°_ ~ ~f:f@ci~l~e Porositl Air Permag,billY:' -2419 12Q!~ !mper~~blÐ 6tH shalsG light gJ:aY9 benton itt·t; ¡, with meó.il.'u.u dark g;¡:ay clay 1amina~ di11piug 11° (~ross bad.dL"lg1) > Sandstone, fine to verr7 fine g1>ainad, n"n=cal;¡;:$.u.'8ous. argi:n.~cscr<1$e bentoniticv with "¥s:r;:r r;]!'i'e carbonaceous ~"treak~< Clay shal$,þ msdi.'I1.mgmy. !.1O:\'1:=œlœ.reo11!?JD $l~htl~r bentoniti~¡} block,- to poor ßMly cll!e:v~ge" gradmg to .a;rgllla.©~~~ bentoIl,itic 11gh~~ medium grBy silt 8halß with clay ~inaøo Sandatoneù light gre.Y9 vs;ry fina g:t11!.meå.ø ve:q argilJ.!i1,c~oua;, al1ghtly to oon='l.'.a.lœreo'18!1 ,A;th yell:,Hdæh grfq siltstone !~tl"œa....~B ð:lld :rsr~ ø,t'Don= aceou!!J 'P~tÇhСJ: there are 2t! òfi)d:!'J 0 f clã.y ahalae msdium 11.ght graT~ non-œ.lœ.Z'i\lJQu;¡'jù at 253" and 254'0 F:ægment~ of ¡¡8d1m gray c~y Bh,g,lsù non=œlt::a.roous not æilt7c '#1th abundant ß'pecks ((JOfÜy ma.tertalo Mi~rofo0Ø11~ abaen~o Interbedded coal, and eJ.a.y 8Mle gI,S at b9.$3 of Core 2 ab()veo r 'D. oc:;:"~ 3 (Gout ;dj ,274=2ro ¡) 280=29(: ij 290·~ )CO 1) 300= 330 ~ 330= 3~Q ft 3!.¡O=- 350 ij ;; ~.~ lle{) 0 1:00=- 410 f1 410=420 ~ . ~~C;'4 D:iJ.j! o J aa~¡ """' ~' .1 "o!i 2°8" O!Jl0~ o i¡4tt 2~Qn lfrl~ 1 u9~ O~21" allO!! " 3'2M 004ôi °'3" 0:15" . G[J;9.:~~ r blG..cl: ~¡ "0 ~ Bræ1lJt to b 1(J,~1~:;í' ';-~'"'~"""';>!" -:!,.,~ "'",ñ ""f)' ".."",:¡~"",,' £7"~".'~ 'V~,..,.i.f <"'a,_·t,.,~.,,,,.,¡,>",,,,,~~.,,, .J. _ ' '.}.< :{ ~ :..< f¡ Z M~""':" Vii... g,¡'."'iõíI~,.&'~{"'" b""C.·,,~·f, ."~J.. ~___ _~_<.._ ~V;:.,:;' M.,-" møð.h:rn g~a i:;¡:SQ. ,Eand~~ t.~;n.[!¡ 2. t, ttJ3 0 C1s~l ¡;>¡tza.l~~ með.i'1.'L'1 da:J."';';:: gny 0 non=t;ä:tQ.f~n·~\Ô';lS;)'ßm'l= ID1c,j3,p:f¡ ¡;}ua ~ :fair rJh,B,l;;r ~h18.v1'1ge \,¡:U;b c;¡;>,r~1r¡a~~{jTta stZ'~kjj .and f1ak'~i! 'i !3'P$¡}k~ of ;~t~\¡¡;· ¡;¡,;¡;;e aì)tl.nd,8.ut in the l<1'rpa¡o part ~ groding to abtEli:mt 2'J,t th~ bas0ø Sll'ck:~~~~~da;i :är~ p¿¡~asanet ~n ~orne '~.?~fa./c~id~) C12"y~tl)n~o 'W1.31"'J' 11~ntonj:~i\?\) !lHH1i<;¡,j g1¡:~,y(, 'with rar;g m inuta (~r"/¡xmtM~i!9011~iêë,rt iðle~ , J3snt©n.Hso ¡g;:;;a.yiz¡¡h "!'fhit~0 1ßHh ;ns,'!'ß) ¡¡Ü¡¡,u'!;¡ß< ca~= boß~~~Ou~ ~srti~la~~ slightly ~11tY0 be©~m~ vary silty with abmd.":\,nt 1j1iu:¡:r~$ bi'(2'tit~ ä~d '.C8..l"OOn- ä'C~C)'U.'8 f:wk®i'J 1&1 lo:"e:¡,'" þarJ¡;" ClaYlrì;ðn~" 7t'Ient©nitic"E.'i'¡ e.ì:xn?j(j" Clay sru~le~ medium gr.ay~ with indiwid~l läm1r~$ m~uped ~nd }:.§!.zoted 'by œlioHe 'W~di1:S of' vaI';9"~g thl©kn~5!S0 ",~iiCh make up at l$ðst bAlf of 'Gh~ ro~k vºl~,~" C1a.y 1l"on:;p~c:na '!;ch~¡¡o) a1'$ þ:r3~Ø:¡;;:t at ~op' and ~~ttcro of t.hl~ int~rvalv Cla.Y1rton~0 meditw g~¥ø Igu!.~oa.lœl'eot.u~o with madim gm)"" f'bslla c1.~y 2!-.218 (1,nd,t'wo thin (1:U1de;r 1. ~) 'bads .of :ahaly¡;;©al ð t 265 Q ,. :B&ntoni\t8Ð 1!Thi'iH~f' with 2~J aeio'HoniB i)f' bls,©k OO;¡r'= bQDacec.pJ.i'J fiaa 110 ©lay 0hia..la ir. tha\;en:t.u and at the œ:r;e of 1;ha iJlt'¡H'~:'L Gl~y 8ña,le~ msd;¡;~ gra;r~ îJUtyo nou=,~lœreous~ with :re,:¡';'í!I mec'1.i;.w:¡ Hghtgrd&;¡t3ilt lßi\Üna..s 0 Bade är~ fJ,(4.'tlyw.g~ Bentonite? ~hit~~ IDtÐ::¡,;u¡,mina.t~H'i c~Y' shalaand. !Jilt ah2,.l\3ø ID8<:U.m 1 igh t gra.y ~ non=Mlcar~:)n~ v g:r~Úting t~ ClaY::J'tou9,¡ ¡)lliy~ m~diœ light gr.:;..y" òeoomJ,ng 1t!Ðd:i:um œrk: gra.yat ba!¡)¡¡ ,,;>lith iJ':regv.:LA.r(' oC'Da~ionßlly c~o~~beddød Bilt ~~mina~o SMly coal", blaŒ'} dw.l;;~œ1y f:fäo\tureo Shälso med1UD1 light gre.;;r D ben!j;,:rni'tiI&1o cOäl¡-" Bentonit~0 whit~ Hi[c:rof'o~f! lb ab~~t a Cläy ijP.s.la" med1tm gray II non'be~:l't:g!.ddi:l(Co 13øntonita)'J'Ð'l'7 H,ght yel1o".7§i~h. g¡',~y,) V~r:¡ G!.l"gl11ßnoou.B ¡; è~me,11 amotUlt e1äy sMle ~ C1ä;r :ð~lt'!lo ligh,t gre.Y0 ,{'11.1;h amall a-momt clay lI"O)\urî:©nac Cläy 8M.le~ ¡,¡ith iE01!1Ð ¡ga;nð.stona" fina gra.~ed9 li.gh'tg~y(, 'l©ì bant\}n1tlc~ !me1 ~ith vðI'¡ fine grained very ~ilt;r ¥!8D.d~¡ton~ :and. ¡~iU¡)¡~©na in, bottom 1(1). Blaœ œrbone.ceou~ pliant fragm'~ßt®G.x'e -pra@j@nt w,t,h¡~ cÐh;!;l~c' C1ä;r eœlsp light gray 1;0 mediUJ'J1 light¡ g1",8.y. Cläy aœlaänd ben'tonitso Sa.n.d~ton3ø fine grainedll light g1'$,Yo ~onbe:ntonit1~ij n"n{j.'iil©f,:¡,q~{(nu3,., with :clay shälev light gray to medi'IJII @:I'aYo No ßämpleo rCl!1.Y \'Jhala~ t11th ~ome sant.1.li3tene il$!l ¿bove) ¥o h·æ=,l~30 )) ~~~7^~~hn 0 "t',;.¡v= '7'" , ~Q~ ~! ì.~ '- tift'" 4¡O="'ryV a i390= ~() $ ;00=510 ~ . . Sand'3't-ona a,nð.~~y shalð a.B. ",d3.h $30011 ;¡'1m,-,}T¡JJ.~; l:1J¡::;eøtûn,i1J; tJ1~di'lli)! light g;¡;9.Y ~ ;:1fl¡J¡l~~~ srgil1'6G;i)01M}) ,) '"lith. 0..n $~;¡,"agoûi:¡¡;~ Y¡j :ln.ltrÌ,¡ iM, i;;¡n~ p;i.0COo $andetoD.8¡ !Aed.iWi1 to i'm~ g~i~H,d" very light ~il f' ~l~¡reau.!S ¡¡ oon=b_= ton1tlc0 with sma·ll amo~\t C~EF ~halao D~th 113(;0 V8:E.l. ~469ij 20 0 0': 1~3(\ 2ijlO~ gij1f1 O~g~ 4:¡gn COäl~) ~ha,ly,; d'tÜl blaok to ßhiny bla©kl, ~Ì!Alt;"1' to blöck~7' fradurBo Cla:¡' ~bäleÐ light (1174) gra.Yo Y8"!.7 bent\}rdt1~! non-~œ,lœrOOU3~ bootonlte d~cr~a;¡¡a~ '!iith ð,epthl) gr&d "!ne into Clay ahalso medium light graYÐ fiB~11ac with abtmMnit c¿r'bonaoeouf1 and coa,ly l:}1f¡,n~ f'ragments~ espe~:!£lly in thø upper ptt,r-t., ' CJ£;.;.¡<-stcns¡¡ medium light p~"'¡) 11,(on=calœrOO11B" Clay Bhal~o medium light ~Yf) wUh intercal.a.tioIi.!i anð. thin 'beds of vary tine grain.~d B:t1typ benton= !tic medium light gray to light graY' l'!!a.ndstone tha.t :Li; calœrsotu) in the upper :part" A few stree.k!1J of fine to mediwn graL'"lad. light gray Wi1:'1 Cä:;oa.reoUœ sand!tone .are presMt in the uppeX' 2 a" Mlcrofo~~11~ absente ClAy øhäla with minor amowt Qf eandston'19 in upper :half and blal\:'fk shale in lower balto BlAck ooaly clay sbalå and. light gray clay sh.a1se '.lith m!Jl~jf' .am@'tw:t 00)S.1~ Sandstone äS 111 Core 5 below." Core Dwth }!ecovsq ~. ..-- 5 512-532 ú 20° ozt 14O;H 6 211tl 007~ 2i5m r532=552 ~ 19o Qrt 1~7" 1°51t 193"( Sa.1ì.ds tone ¡¡ very tme graÚìsd[) veT;{ S n ~;¡ p very bantoniti,co medi11lî1 light grtq to light olive gra;:¡'J very ¡lightly calcareous <> Sa.nd 1\3 VOJ:Y angular 1\ composed of clea.r and white q~rt~ø Cì:ftSD. :f'rostedß and- g'J{."ljð;Y or dar'xr rook :tragmenta ~ mi~;, h COm1!!On¡) pyrite and glauccn1ta ab'3~n1L Effectiv\') Air (Æ;,;¡;'bona:!I;e Cont~t Depth Poro9ity f2m$..~bili\\;lr ~.1: ~.r~¡01ght ,14" 1591% ~e~aable 525û 9~4 L ú 17,,9% Olay shale,) medium light gräy tij med~.l¡m gzaYø veri' bsntoniti©ø IWn.=c.e.lœ.reoul!~ i!ll1ghtly silîty., Bads are fla:t = 1y ing ~ Sanda't.cue as a.bove 0 Cla.y gbnls &B ,äboV0o Microfoun~ ve:ry rarêo Sandstone as in Core; abovÐ. wi~~h 1" clay l¡>on~ stone ä1; 00.880 Clay shale as m Core 5 above 0 S11tstoll.Gp similar to &andiS'Gone above but iCompoø~d of sUg.lttl;r sœller=slzed g:re:i.n:~", iL . . ~0 6 (Cønt ~d) . ~ "" 10 it '" "¡ -~ " ~ . .,1.., . ""h ' , ~ ( ~. "1\ J.);t IJ¿,8,Y >2i1ß.!.~ .e,;;¡ a~r1f<"!l~ vl;i",,·Q JMr(~ ~ :>.n ¡Q~Q:.8 ..1-J,:<lli.;;)¡1" "2" j I!Jf silt a¡¡,d VrJr;! fin~ ,gr-aiE®d OO;:ld~t@:i1$1' a~d, t~;JO 10': beda of ~ilt¡¡::tone1 me¿¡J;uJIi light g;rayp iil'i}~= œlœZ'(j¡©usf> ~Ji1:1.:¡;h thin bad~ of clay sb,ala"b<\;rt'~l1eøl1 541 ¡ a1;1c1 542 ijf.i and bet'H®~n 546 ~ and 51q q a ~l1crofossils vary :ar$.. 552=,510 a Sandstone as in Corea 5 and 6 above.. D~th Oorª Recover.r 1 ~51()-590 ~ 20 \f Olf 7G10n ¿ ~4!1 ' 2J6!f 1~31'! o G5!1 1~51f o 6g($ 3"9n g ~o=60gcr U f! Oil laT" IP5" 3crll" lUl" Sandaton~(i fine g:rained. illÐdiU1i\ light gray 'J ve~ benton1tl,c~ Iñligi.ì.tly to 7tðTy œlœret)uø, com= :posed of an~r to 8iib9.ngular g~ins of ~ihite anð. cl~r quartz a.nð. ~y and da.:rk rock f~oots. Biotite. b common.. M:!nuts 'bev.toniti© atreakl! are pre~ent: ~rbonaCi¡;HJ;l'l'! partingt'! are ~r(§" Ti«) œ-lcite siì¡¡?eakil 9,J:'Ð preBent :in a. very cal= careeu,!! intervsl 'betwt'H~n 515 Q ~'ld 516 "c, Eff8ctl'if~ Ai:r Ca.rbonat~ Content Depth Poros1t ~ermaabilitl ~~®~~~_ 57bQ 14~ 9 md" 10 ~ 25 Sandet,)ne as aoo'ffl~ bilt vary fine gmln.ed~ grading to f:1a.ndetoD.so fine ¡gra.1ned.~ a,¡¡; a.-¡; top of core. Siltetousœ eänd7~ light gräyc benton!tic~øalOår= eous~ witl'! common ~light1y œrbo~C801],1!S :œ&!ì1:'1.na~ d1pp ing 0=20 . Sa.ndBtone~ f1ne graIned? al at top of core.. grading to medim çaw.sd .at rese" Clä;r øha10ø Vél."y bail to:i1,i'U~0 ll,gh. t, g;r.>~eni~1h gJ;';'¿Y ¡, non";calœrooWl ~ Coalo with 1aInini~;'! of 'bl~:M;;k sr...alth Claystonso light grssniah gl'SYü gI's.d1ng té l:lght medium gmy a. t ba,9G; sub~c¡~.chc i~l fr3CtUI'~ be©ommg fia8ilÐ to) "â rd. œ:¡;e~ ncn=calœre{n~" Microfoadla a1HI¡mt" Cl£>.ystone fragm<s~ m@ð.1um d£t:i'k gray to ð.ark gre;y 0 'w1 th ~ll CUI'T@d ~11cken~ iê\'~d ~fð,ce~ on eo faw p ie©ituJ" . SUt lhale to ~ilty cla,ystOlM)[' very ligbt gray to light gr~y. elight~y ~1©ar@ous9 very.bøntofi~ it1c(} w1th rare œrbona'~00us particles a:aCi. al:ml1!l= ant biotite fl~~e3ã (00ms ~~~~~l)o @n Dðddlng pJ.æ¡,¡U9ao Thin (1=2") b('Hla of light gm,y bentonite are al;j@ present" PoOl' øhaly cleaw,ga 9~!fH3tS f~ U;ying bede Q CJ.s.1'8toneø 'Very bentonlt1©e to 8rgillaceotW bentonit~~ infiltr.ated with drilling mud~ Light gray t@ light medim gray!) non=calœreo~~ 1rrligU.lar to bl@clt',;r fractU1"9o Claystonsedßlu'Jê» hardo medium light ça'Y~ non= Mlca:r90iW M1c~fo~sil$ ab~~nt~ 9" - CO~ft} 1?~:t;'- ~e~o\~er"l 9 60~629 Ii æ 9 011 10 629=649 <I 199 ort :u 649= 669 ¡ 12 6,.. r 1:;9=!?89 6 20 q 011 20R 0" 3171'1 o ~ glt 0'91' 31)11 2171i 91011 . pa~.cr i;V,t ion Sandgt~n3 D 1 ight gra~)," 9 ~ry:lng from fine to medium gra.1nað.~ -öentenlt1ce !'I.mßSiVÐo I~~ iB vs:ry calcareous from 613 (I t;f,> 61509 a.nd f:r01U 625 ú ;~o 629 G;¡ ~nd li! !!omew:hP.t :H,ghtel~ colored through the calœrootl.B m= tSrv£18(! ©Om-pa.rsd. to ·the nOll=ca.lca.1"9CU3 e8ct1om~ above and òel@'\;;ð Galca,roo1.:i.i! ßecti.on~ usually have sha.11' conta.!)ts with the ov~r~· a.nd tmde;rlyiJlg ~OIedßo The sand 11 compossd of a.ng'J.lar to IUbangular \'¡hi'ta e.nd clear quarh and gräy a.nd dark rock f::mgm'f3nta ~ biotite ia common~ and œroonact!Ous plaut :flak'3/i a:r'$ :present OIl. a few ra:re ~,:rt 1Ji,ga ,..,..hich d~,p ~:pp;ro.:d.ma;t.sly 12v., Depth Effective Air Carbemats Content 2'~os1ty Pemea.b:UUI ~ B;r Wei~t_ 6110 21o~ 5~md~ 627Y L9 Impermeable J+Oc~ Microfouil'!I! are ab8ant. Sands ton" ae aOO ve ~ calcareous from 629 û to 630 iJ ana from 634 ~ to 639 {i ~ the lOil,er :pa.rt of the lätter m= tenal is yell<)1I¡bh gray ~ a.nd 'w~r:;¡¡ œlca.reouB" The :rest o-r the co rs " to 6t..'9 (j, it! modeT'd.tely œlc:äreouß" Effective Air Carbonate Content D~t1?- . Pore BitT Permea:~ni!l í By Ÿfeight 32! 23,,2% 11 mdo . 641 Q 10.9 Impermea.'ble25,o 6% Microfolaile a.beent~ Silt iòJhEtleD medium light gr.a;p!. non=(p.älœraou8~ benton~· Hie. argil1a:ceo'Wt~ with rare parti,¡¡l$B of coa.l s,nd mice. fJ..a.ke&!!" Beda are f1At171ng, Sa.ndstons~ IIsalt and. pepper/! J mediu,1J1 gr'¿inadl' light gra:y t s,rgill~.ceou8" n.on~ca.lcareo~" Olay sPAla~ medium light grs.Yø 211ghtly bentonit1ow D.on-calcareouâJø wHh laminae and ~nta:rca.l¡:¡:tionß of light gray Blightly to vary bentonitic nOll-calcareous cla.;vstonso Silt shale as aOOve. Clays tons 0 medium light gmy'(, bantonit i(~ø nôIl=c.a.lcar- aoua. 8lightly $ll'ty in þS.:ri,. blo©ky to :Sllbconcho1dal fracture 0 Sa.ndßtone~ Ilgalt a.nd peppertl \! light gray,) ::tine to med1'U111 grained,. non=œ.lcsreou~p arg111s'(Ç¡h30u!!I, mica- ceous 0 {)3.:rbonaceoì4s part mga common below 665 I ¡, Beds flatl;i-ing" D~t!A Effective P01'Oø1ty 1ð 1802% r.1icrof'ouUs a.bsent 0 , Air ?erm~bi11tl Imp emea'bla 19 '3" Siltstone and very fine sandstonap light gre,y \> very bento:nlt1~o non-œlca.rootl.s~ with common biotite flakeã G Grade! into 100 . . v©re Di3'î) t h. .~ Be©{) "'ie~ I>'9i!JCri,tion ~~...~ l2{ 0,,1/1 t # d) o '91f Ç1a,~Y~tlÕJ:H~o light {f;:J."aY~ very bexit©D.itiq,::v n¡.:m=œlcaroou;i; 'blot1t~ rco!!!mono Denth Effective Porosity ~~r-l?axmeabi11tl 6'1"2.~ ~-=ï7.~Ql - - ~f' Ir!'!:p!3:!'mæ,òla 6830 11.7 ~ Microfossils ab9~nt~ 13 ~ o~=10Bg 19 ij 011 10 ~('1 Interbedded c1ayatoIH.! as 1n Core 12 ~Jlith siltstone .and. sa:¡¡ê1.!tone as in Core 12~ slightly to badly m= filt~t$d with drilling mud~ . 3 '3H Siltstone" light gmys bentoniticè slightly œlcareous in p..e,l"to ,1 Swirly" badding{\ marked by :i.r:reguJ,ar Q ffhapl;.r di-pp lug c1a;y str_k~ (and OD.S q;;la.y ironstone streak) between 600' a.:ad 601'),~ 5 '0" Interbedded clay-atone. med1~~1 (!;'I1J.7f 0 nQn:~o'calCf1reoust and 811t~toD.8? madium ligh~¡ g:ra7~ lfÐr'.( a.1'gU1a.cooul!! bentontti,Qç non=,œ.lœraoua~ Bed! fla:UyingQ ÞB,crofoun~ absent ~ 14 703= 723') 20 q O:~ . Clay shals8 madium light gray to medium gràyo silty in :part" :tlO!Il=cä1careousp 'bentf.:mit tre in pa.rt~ ;.¡ltb. rare madiun light gray B1lt~ @t:re:~ks and lamina.e; p"Oor sœly claava.ge a Thin bedí!l of sandy D 11 tare present bet\\1een 715 ~ änd 1168 c, Eare :tlakee of ca.r- bonhedpan t frs.gmeD.t~ a.re present 0 Small (1/16tt in d1aM'StSJ') round or oval þ9:çche~ of mediUlll ligbt gra7 clayo on light gray 9ilty claYBtonao are common in Bome parts of the core", Lam~~iaI of gmyi~h white bentonite äre rare" Beds a.re :f'lätlying" ~aorofoÐdh a.re absent> 128-7ro Q 700-810 · SlO=, 820 ~ 820=830 ¡¡ Clay ahale~ medium light g1:9,y to mediUil1 fJ;I'ð;Ya Clay ehaleQ medium g:ra.yÐwith some light medium gr'"¿Y ßl1~1Ð;~@n3'~ white bentoni lie is preBent bet'!.4'een 790 9 end 000 1) Q C~y 8Î'.alep !tt3d1u:n f!.ra:¡-,. Clay 8Ì'.,alsø with sma. 11 amount medium light ~;1:a:¡' slightly c¡::;.lœl'eous eand- etoneo CLay shale" mediUM. gray" bentoniti~o Clay shAlt! as e.'bove~ with 8o¡¡oe medium light gra~r œ.lœ.raou$ bentonitic s 11 ts tilH19" g30""890 ij 8'90~941 ~ ~~ 15 De-fjth Re"OlYeTY 94&-9600 11 I) ot! Clay-stoneu silty, medium g~y to medi1W ærk graY', non œloo.reoulJt very 8lightl~ bantoD.it:!.(t)o with abundan.t ]-amin.ße of medium ligh.t gfi1,y !Ut §Mle and !3ilty chYßtonso P001~ shal¡. clæwa.ge in upper parto and at bass of core" Silty 18Aflwáe are flat= lying; one lrreguJ.i!!.r ì" @tr~ of sa.nds'1;one ät 950 u dips äpprc:d.mä't81y roo" 11" 960=9803 900=1000 ~ lOOO=·lOl!Q (, 10ì~D-lo4g ~ 104S-=1055 ~ Core e . ClAy sbîs,le dad 'bentoni'Hc í!Jili'Bt¡)D.~G with iü:!.nOT a.m~,u.'P..t 'Jf bento:rlit® i'à 'Upper 10 Q. Clay sbäla~ bentõnitic. with small amount bentönit1~ wiltstonso Clay shàle~ medium gray ~ slightly benton1tic~ nO%l=œ.l('..areousp with tr.a.C1Ð silts'/;one in bottom 10 i. i5a.nds tons 0 fine grabed. light grä'l! ~ ffsa.lt a-nd þßppe1"t! oœlcareous? No 8ample. 16 D~th 1055=-10660 Recovery lOQ 0" 1" lo66-1O~ ~ 19 a O!! o t3ft o 341' 1~5n 0310" 4·10" 3 ·o:t 12 úQ tt }.po~ Q';ß 1'9" D~~H}ri'P~ 1cJp. Sands'ton*o fine gr,s,ined$ light gmy 0 nOil=Cälœreou8t 81~~tiy òenton1t1cè C1RY8;one ~1th øilt laminae ~8 in Core 150 Sands'bone ßt! above ;i~ by 21 clay ironstone nodnle a.t top of inter,¡al.. Clayetoneo mediwn light groYe no¡¡,=,œlœ:rÐo;"'s~ slightly bentonit1ct with a 1/8« bed of clay 1ron= 9tona 2?t .ã.ÒOVI3 ba.se, and ta !!!8Jldy cJ.Ayston$ \-l1th a,'buudant œ..rbonacsou9 pa:rt~i1 at ooa80 Sa.nð.3tonsq fine gm:1.ru~di ä%'gillacsfru'G" light grail 0 benton1ticr non-œlœreous;} compoßad of angu,la,r to 8ubangular Clðà;¡: and 't1h1t~ qus,rtz gmiD.9 with gray and dark rock and chert tregmentiìJ¥ biotite 113 CO!!J1!1On.. C1äystone with s11t $tr~9 B8 abovoc Sandstone as abov8e but VÐ'J1:1' ca.lœreotlB and Blightl1' lighter in color trom 10631 to 1065 a G :Effective Ail" (:arbonate CoOntent ~t~ Poroø1tl f_Grm~bilitx ~! By 'ife~~ht . 10 3~ 15~~ 12 mdQ lOo(p Mic1'Ofo8!lils a.bsent. Saudatone as at base of Core 16~ b8cOming less calcareous with depth~ Ef:fa~tive Air Carbonat!l Content P~h POTOs1tT Pa~eabi11ty ~ % Bl_Wel~t 10 7 ~ 1 c fjJJ I.mpermaable 4101 , Sand,¡¡¡tone as a.bove. ,;¡¡1th n:umsrou~ 1-2" olaystone bedl e..! in Core 17 t 'JJhich me-ke up ia.þpro.x:ùiw:Lte17 2')% of the interval; cnB clAy!!tone bað.'} 'betw.!en 10739 and l014~o iB 8'i thick).. Between l071( and 107S& ala,. ~ina.3 and carbonaceous pä:X'tings dip æ~·,2<;!J ~ änd some clay strea.lç~ ~h(),!l ~fi idrlyl! bedding" ",'\.n angu= lar 2ff :fragment of clayøtona vhi~h M! alight!,. silty ~in¿e an.d a thin bed of cJ.9,y ironstone is presst -a.t the to:!:) of the "0H1rly'!!beddlngü embedded in the sandstone " C1aystone aD in Core 16 abovo!) with laminae and thin {2~ 3~ thick) bêds of ailt and very fin.e ~d- stone totaling 10% of the :,odq œrboDäcÐoUtJ partings are present... tho~ æret 1n the !Mdatonec Beds a.re flatly1D.go ~nc%'Ofoi1~ Us a.bsent" 120 e . ,R.e.'~~.-!.~!'Z ;1'€_:f1~Œ]: t.io~ lOS5=10S7v 2fi Oi'J 10ß7=1090 · 105¡0,=>1100 ~ 1100=1130 ú , ""''', "111 'I" '0 .bj....;;~<~,i'i ~ l¡l~()=]~l50 $ 11~O=1160 ¡) 1160=1000 ~ lmO~12J.O 9 1·~1r=1,.h", , ";::,.,·U ~~ 12P-iO=1250 0 1250-1200 ~ 125O=1:2g60 £'Õ:!:'e DeTI th -~ . 19 12860,1306 ij 1306=1430 9 lL;30=1Þ,.50 0 ':;i~~ l' ~ Dtmth "'-~ æ 1451=146g :¡ Claystone 'with lam:t.liae of ailt ,and a8..\i,1,atone S"í3 at oo..ß'9 of Cere 17 abo"7s; ä 1~ iIJ.h¡·~·ll a"G lOgGs iw app:rozima t.:01y 5)~ elä7 swl\i1i ~nd 5'y¡t c(}aly fla1~~1§ " :B ad$ E.Te flð t l;;rtilg' 0 r-,r:tcxQff;~~il~ abtl3ntt> No s~mple" Clay ~haleø slightly b~t,ðnitic~ and bant~nitio siltstone with abunda~t biotite flakS$9 Clay- !ha.le¡) medium light gmy" vary' 21ightly b~t¡;,:niti-c,) !\i:U$h ¡¡¡inCl" amount whitabentonite and light gray a.r,gillacoo'J;.~ bant{;!ni',te" C:li;J.y abELlso madi1.U!I. light ça.y,., 'I;,fith ~œll ämounijnediwŒl da.1\i-:: gray cle.;r shale" Clay s:t,aleo medium dal'It ~y~ with small .amo-unt met1.ium l1.g11.:. gra:y clay ehale" Clay 9ha.lsf; medi-um dal'k gray~ "Jith small ø,mot:mt medium gray eiltl5tone~ Clay ~h.a.le~ medium åa.rk gn1Y~ Blightly mlca.~eo'¡;u~,) 21ightl;r !3ilty" as in Core 190 Clay ~ha.le with 8mll amount iihite 'bentonite a:o.d 80me ~)¡£jnto)¡\itic slightly œlœreo'ills dl hton¡g (con:tamina.Hon from ,above 1) 0 Clay aha.l~ ~ medium ð.ark gr-ay" S:Utstone medium l1ght gre,Yo :non=œlCäreoufi~ slightly !bsntonitico Clay §Jr.a.lev medium ð.ark gray 0 non-bentonitic" . No sampla" ~oo ve,g: 4'; 0" Clay ahal~j) medium àa.r.r gray" nOIl=:calœ.:reoua <1 slightl;r mics.caoutJ 0 with abundant dbc;:mtin7löuifl laminae ot medium light g;m;r siltstone" :.Bade è-re :flatl;;riug.. Zone F micröfoss11s are abundänt" Clay ehal",;; mediun dam gray 0 aa in Core 19 J!:)J>OV3v t1ith a ~œl1 a.lI1Oœt of siltßtone at 1310=1321 a a.nd J.1~2G=1430 91) and s. tr,3,109 of bantonite at 11.;00=1420 u" Slltl'llioJu)¡¡ olive g;-r¿y 9 8a1ldy;¡ slightly calœreou$0 with a. aœll amount of clay iBhðla" ReCt1VSTl. 7!! Q:! 512!t Clay shalf!!" medium dam gräy~ slightly giltys llon= œlearsou9" poor sha~ cle;nrage." with s:U'¡;y ],.aminae in lo,,¡er part. and 2" ca.lcare.;:;u CJ.¡¡;¡.Y9f~on3 a.t base" Silt ehaleo s.:rgillaceouB~ l;:,ght medium gmy!> O:ro8$= 'bedded9 TI:JT¡¡ c..oq,lcare'Cfilsø with rere ©la.y lam1na.a" Clay sMJ.e aD above, Silt sbab as abov!3o Zone ]' Il!i~rofoseils alnmc\ßnto o G101. OU511 oe2~ 11~68= 147 g q 13 ú 0 U ( 111.olu.d1ng 3 Q f'l'OlÞ. Core 20) .21 Clay abaleo elightly ~11ty and mlca.ceou~Ð medium dark g1'S7" with a.bun&:.l.n.t thin (1=2*) Ì':IediB or calcareous medium ~~y 1;0 medium da.1'k gray silhtonsD and Qcca= gio~l ~r. øtraeJu of clay 1:ro)t).siI)Ill$o The eilt totals 2~ 'Jf th~ r¡!)©ko The beds hi,1,Ve f~i;r 9hal.-V cleavageo and are fj"atlyingo Zone F m1c:ro:fc:~r,¡U8 are common" 14- 7g~=11~t8J ~ 14gc·~·1~O j "" 1 490r..., 1 510 ¡ 1, 510~.15ro 0 J.5æ=1550 ø 1550~1570 ~ .. ;-..,';"' l¡:;::('O a k? íV=~' -...rJ 1590=1610 ~ 16¡O'~16ro \j 1620=16}) ii 1630=1631 ~ :~!J.! ~ D~th 1637=1657' 12~ o~ Ra~ .,? . . 30 eðffipl1! ~ Snt~tõnap ID<9di;;¡m grs:Ye i-lrgU.J.ß~\')t.fU'J.3;, a¡¡¡,L'i ~laYî3'ttHla¡¡ m¡;¡diu¡n dcEirK gX·i.\t¿r~ Clay gha.ls;¡ medium <.ßrk g:rta:;¡ 0 SUt¡.rtonsp light olive graYD non~lca.roo1J2~ ,·¡ritb. t:r'¿1,(CS cJ.i;1y 2hE,le~ Clay !hale\) '!:'lUn t~ce !!Iilhtone L" upper 10 G~ Clay ~hsleo with 90me silt~~onsc Clay ~ha.le 0 Clay shale and s11tstonsa Cla.y sba.le "JJith small amount Bil't8ton,~> Glay shale with some sandetö!!.'8p fine gìf'B,inedt II ~H~ a.nd p'$pperiVe light gray ~ ärgl1läceoue, calca reo us 0 non beu i!;¡:ai t tiC> Sandstone a:! above,with tra.ce ~ha.le and (;Jl1tstt}ne" Sanda t,one v fL"ls gl'a.ined~ siltyv light graYe nori=c.äl= care011.l" Blightl;r bentonitic~ with poor IMly clea~gec Sand is compo sad of ang>J.la.r to sulF<.Qngttlar vhit9 and Olea.l" qÿAl"tZ", l'Ìith a. ørna.ll amovnt of g11?::Y rchert and darE. rock fragm9DJC¡f¡o M1œ. b rareI' pyrite åud g1a.uconits a.b!!lent, A 1 ~9n section·4 i above the œlrs of the int~:r- val i8 ~HghUy ,ooax-sare some'What lighter in colors and œ:1CßZ'sous. Beds are flatlymg" Effac'!#ha ,à1:r Carbonate CoI.rteut ~-64~ Poro!'iiy Pemøbility .. % ,By Wei~! 1 0 l~" 1% 2C md~ 13" 13'% r4icrof08;ßi15 are absent" ?~ -", 1651=1675;1 ro g o~ ( in.clu.ding 2 I) of ~re 22) 2Î~~ 1615·~·1695 ~ Sandatone a.s above. bU.t ma.ssive~ noD.= to very calœTeou8~ carbonaceous partings are J:1Te5snt¡, thou@¡. rare. in the lower half of tha 001"8", 1='2.11$ at~w colored ~ut and very pale yellow re9idu8 in CC14 at 1662 ~ 0 F,ffe©~lve Air P6Et!! Poroäity Pem~bilitl 16 2¡j ll~&% Impem~ble 1671 Q 10" 3 less 'bn 1 md" MlcrofoЀi18 BDsant. Carbonate Content . % ..¥~ ~~. i~L- 15" / 13~45 20;¡ ot; Sandst?>ns a.ª in Core 22 a.bove ~ sli.ght~ t@veI7 œ.l=, careou@l~ Blight:l¥ coarser (:tine to medium gl'S.ined) below 16g6o" Bedl :flt?qtl1'1ngoA.bun~'1.t Inoceramus ahell fra.g;.n~ntl8 in a. 211 interval at the ba.se 01 the finer sand at 1666 ~ ~ Rffa!C1G 1ve Dtt~ P1;>ro<øit 1 55:1 "13" ,:' 1681 ~ ro J,¡, Mlcro~ofisi13 abeanto ..~il' E'_a:rmoabHi t;y 25 må.Q 30 md.~ Caròonäts Content % BT2;iØ1t 5~g Ii{) 25 1695=1715 ~ 190 011I 12 08" Sa.nd0tone~ £1,':1e gr.a.ined~ slightly argUläceoUDe light gra:;¡to light medium gmy~ noD.= t;@ ~llgh1tly œlca.reouB~ l'1i>J'l-benton11.:toc The sa.üd.!\ton.e 18 mA¡¡H~1weo sxcept fer oarbona~eou§~ 11mcniticQ very bentonitic laMinae abun- dAnt between 16970 ant1 169g G I> whi:oh dip 0=1° <, The sand 18 cOIDþ@fjed o.f angt,1.lar to suœ.ng;l1e.r clear and. 'White quar'1¡~ with So ·m1nor amount ©f' g~;a,y chert and 14" <_':10 T.3'5 1?35~,1'755û 20D 12'¡ . o ~7tJ 3"" I) 'v' 2 0911 f'><11 \,J ,'? (} ~6s'* 19 5 iì4\1 2¡j2f~ 1 ~1¡1 OJ1({ 1;19>1 1~?~ , . dflXk 1\)::~k ! t;'!3;: If:rU.:3';Q.::;:;: ~-71 ~t (';~: tJl\~(~~_' t~;h:d~O if! t\~ ar~~ :i":ß~~'\ß,~ <-b?:,2.-:c.am.~~.la ~Jb.ø 11 u~p 1 ~f ir,~ tt:laH1e'h~r () rt,:<,l¡Ptj ~:t t e·d paf'2.111~1 ·,t,!.:) ~bed.d. ~;llg :;ilaJJ.et @ ~J.r~ f3œ t t e:.rscl tl1j:~çi\1gj~t1t ~ l~al,~ s t~.d.~J~··'C~~ ~e{t c~t @ V'S1'7 p$~le 7~~1101!j :r-8,,~id1.1a :lu GCll~. 2.'~; .1702~?o ~~~ Ëff®r:·t~~ Poro~ftL' ,(',.1:;:> FS!'1i:,,;j£'j,bUHy lb99 Î} 13,~ f5j; ~-~·'--'--"~-<1l3-~rtr.d".; --. 1106¡¡ (:{)c,2 tb;2)D lmdc Clay!'tðn[a~ !f:.Sd:tU1\l {j;'§..¡:taY{l n(~n=~.Æ:~J1i;B.r€;OU:,~~~ lllli:J.-.4.CiÐOU~~;, ~tlt:rtj with i,¡!I.:tê;r'~1.1Ei:t io.r~ß of~ 2~:Ll-:4 ,f;~B.è'L YS~:f fine ""~md"'''..'¡"¡¡,..,.,,. ,.. ""h",.1V ;">l.,.~.,,,p!C>. i'-' A~.,..,'.'!! "='3Q~ g'L:J',i.'.4 iiô).""" ~,..,. ') .", ,:::;:¡...~-.....G' '""''''3~...-..:> iI ""''''-è.~.. ~ ~\ '='~...... '....~ -... <:"r. 1" d;a '1:,.,,,", '" 17"'~''''' ,¡>~~, ,,,, ""~"., "'..< ,', ..,,,,,¿ 11.,....",..."''''' 'n,"'~ " ",,,,, I..,:IQ.,~ ..... '.,.v~<.'!;;J~ .. ç,,:t.ri! - ,.u.",~ 6.£,~J,.«h:"i";¡·Y.,.iè '-:"c.ol5--,..!..;",,~~.:.':t-"""QO ¿¿¡.::; p ~.'>õiI\.J..~L,;~ light gray 0 mQd.~Y'ð;";""ly œlœ.¡·~onð "1:lt'h lä!!:tiœa of m~¡:¡iwn gm;l 'cla.}'" 0 C J.a,y iro:il®'t,:,;:l9 bed 12' f~hlcli: i~ 'Pr~es:fi t tll t~ l73J) Ij ,= ClrEkii·~tOn.Ð 93 ;9,"t¡,yitEl r,:r1'·cxofO'B·~11'® I-Ð_Y',Y J::'3.Z'.!," C1R.:yatol.le ¡) mf;dj~-~ g'~":äY_~ b$n~~n-~.t i'-oj) nan~'~c~1,çs/reo't1t; 0 8e,nd~·t@li.~" fiJH~ g~d.)¡'l~d. (vez'y' :!"1.::n.a gra.in.~d. :rJ.et:1.1" b.Ei.~a of oJ;rs) ,:'¡ glighd;ly t(; ~~r:l a.l"'gillz~A~~Q'~"Y:.%;) l.lgh.t oli'V8 g~y gre.ding t,;:; li~ht g~;r \,'¡¡~;h ð.epth~ Blightl;r t,·o m¢deI"'.a. t @J.,;7 c£1.1c~1ri3(ru!" flÐ,n':'. g;t"~,ln.$ ß'I'~ i'a.ilgtllär tCl :B~i1~?ø\;;¡hit~ cl~%' G:w'ft?r-t£ !>lith g'r'ay ,¡md dJ1l.%'!t rock fr,agmsn'o;t2J", aa"ld !;a.r~ mi©a,~ Carton,acð::ì!UJ l&minae a¡>~ abundap¡l; in a. 211 :lIectiôn 6'è "~le»'!i;the t©p of the ~ð_i!t,m®p and i,z.;. ¡i¡¡ÆfJctib;¡¡$ <,?,t¡ 17291 e.,¡:¡,Q 1131", A g,roup of ©",,'1\,1 c:1£1.,f j,;roJ:4~'~!pn$ .!].cr1u.l~~ "~=l" jx. ttim-meter h p:re~en~ at 1.732;¡. a];1,d. ;;)::~,3 2';1, D.Qdt')J.!~â t 1133 ~" Pale $t~w cðl;)};':!Jdç-¡:f.t. ÿ;¥'r"J ~ri:ill~'.4 ¡;:';"9!d.dtt~ î¡l COll . at .17163; n~ ~ut Ì);'¡:rt :~.d.!;11~,¡'" I'í'ii3ldv.e at 'r!:;3" c jjj1?:r'$c'ti:w-ø 1~1r C2,:r'-1)~natt,:! C~nt$I1t P'!p!th PoZ'o~t~L~ p¿¡rm€-ti.billt;l %Tj;y- f1:J)~ 1723 ~ 17 09~~i~ ~~7 mdo ~-- ~~12:~9Æ) ~ "' 1"'... () ,"", ;-,~ ..-. =" ... ~,¡--((; .k! :;J) 'J 16 D ~k ..t'''1'~i~U.<r' .t. f ,? );~~ 3-11:ç:~r~fo:'~>ðt:t® Ebt~;8nt:) Bai.'ld.!3 t~ne ¡\ '9iðT;]r fù;>~ gra~J11€ìd~ ;"1rgil1ß;:1€)~n1:~, n1i))diU.í\1 l:ì.gD.i),; g'rB.;V,. to lii\5iW;=ca2.¡;;aree.U.3, Cl,a,;r ;Sl'}ala" '~r.~~l7 111ightl;I ':i:itb. m~d.:tt~l li.gk11; ª:rey l·~f1i.rnË-1~ ~~.f '~~rY' ~iltø B~d.8 fl.a.fìlyi-'!l{~I) Si.lt3'tô~Qê~\ ·v:¿.r!~y al?\ª~i~llac~crU~fJ :;n:-~(li~~ .,~l;grfG gr'E.,"3c"~ "'" '" nO:;1l=>ca.t'c.B.r~:H)t\~ ';'} mlf:a~}47~U.e ~ Clay ~}"tÆ11-e ~~ i3~V~J¡I Sandstone ,:',9 ißÌl(;'V$\1 1.n¡i; ~fJ2th at·mJ.da;ri;,;:x':j:1!:¡¡'bef..d'\}d¡¡¡.llt larli :~s 0 . mi;~:i.:G~:¡u_~~ 8.r,5:in<.~c~tnl$ Intߣ,'be::'!.r\.ß'!:9. ~hAle a~d ~ilt~t~~~o £"!i,f;r,~fo~ß i13 ·~'ìJ:t3ê~ü't ü DtJtðt'h :g'f:faicttø;l$ ~Pðj;ÿ~·i'tl 171,;Ò 'j '-··~=~==~~~'13- ~ 37:$ - - -- ~ '~1!. p erro,[¥'$, ì:d.:u"~X Ú!!!@ß ·thnZì 1 K\1CJ"o 2g 175:~=·1 (\ ,j r\;.{'ii' "!,.J' V . 117f}.~1~?76~ 1n U f'~t. ~~~,)' ~ ~ -". '; ~ - ;7 '" ...J _"", -;: Including 19 ~ fÃ'öw Co:r~ 23) 217?i 1776,.~lglO D 1$:'0= 19¡1ß u 3t!On :3 g2t¡ o ~lO~i 4~2~ '. ....-_~ ;;fJê I~t~~b~dded ülð? abov{:J~ Sil~~¡~ cl:?"YB'-tons;.) fJ1.ed~~1:£l :gri~¿r~ rJ20TI~,,={;.a.ltCa;re01Ll~$> g3?atl=> tng to ! il~t fBç~c.~et. :TIðtli1J;lljË~~i."1a-:] r eligtl"tly ~f3 l=o.":> œr;ø(n~~? grF;,.{lj.4l~g te: Tt?þ;{.ii.Y ~,-a.¥ld~ tOile 0 rn.Ðdiüm ligh<(j gra::/, ç; ·c.aleB~r~)oTh]: r©cck ~t.:yp;'ð~ ,:~},.:r·~ aþ:pI~t}¡%= imat~1y eCl~l in thickn·t;¡¡¡¡¡;" ,., h¡¡-,d;:;1:' m:9d:h:tCTI g:räins¿l i!£~¡¡a.i3 ti;>ns 1Iw..;dz~ '~l:h::¡ œ.§~ 'the zß:ïld.trt~:p,ø ~ Cle..Yj¡;t.:)21ê~ rll'adiu.m. W?1ri: gl~;r~ 'Wer-;;,' 't© ßlightl~r $:11:1;71) non=cal.Cf'.:ref.Jua ~ ¡n1~ì.c~oTI;'B" Intø:tÞeâ.B.ed a¡,g:lllaceoug,~ ill.0ód.1XE gr'ið.;yû ~ligh..tly ca.lœJ:'oo?);}j ~dlt[jto.n~ ÐJld IDfJiH;:œ &Yk gm;¡ clay~tc:m"0,, S11t~to~sç m~dit~ light g~¿y~ ve~y axgil1sGe0u~, slightly Bandyø ~lightly {~lCðr~ußo with mo~tl~d ~tr~k~ of ~lightl}'" l1ghte~ Ci';¡lô~eð.? "1í'3:"Y .t:al{;:J3,r~ou¡!} siltBt0~~ ra~embl1ng ~~wirly~ bsddingö Claystoneù 1i!3dium däl'k g:rtJ:y~ 'Wsry glightly Bnty~ oon=calœr90u~;; with 1ami~.~ of calca:nß!JU',~" m~d:tm light g~ay ~ilt~tQneû Zon® F Nicr©fog~11 ~JH¡~cj,¡¡:;!Ðn,i! ;~omID.')!!.p S"::Jecìl~~ ¡'/:l.I'!3" aJ:~(t ~:Ji~lì~r1c:t~{e am ,~ti. G01~S 2T Cle.~ ~häle" med.1um ð.ark g:ffl.:y i} t,d.th t:raeê '8iltâ'itcª;~Q Sanð"t3t{H'1Ðo fme grained0 ~dth CViä1y !nte;rœ1at5J:,~i~0 tJ'1:1;n sill¿:¡,ll a,¡;:¡t)Tint cla.~· shal¿¡ and trace b@nto:fd,'~ð" C~J ¿~,~ î1§'j?,'''' 'b =~~ ~~Y!l;rl "f} ,ø' - 181g=1825fi 7 r¡ Oi1 15E~t..~1,g~tQ \; 1 ')9 ¡~ Sand¡:~t(m,eD f':).¡:¡,e g.raÙ"A¡Hl~ !!i 11ghtl¡r?",t'€ills.<eeous ~ light g;,:oay r. very calCä:r,~OU~ c" CC¡!lpOg:acl. l~f ,¡j.11g'~Ùar- 1N ~,lba¡:¡.ß"'\'i1äX' 1Jl~:r ~d 't1hite qmxtz ,'lith I!. small ;2.llic,mnt of ¡:¡;;;:a;r Ch¡3J:"]; and da,d:k :ro ©k fmgma;t.<i¡~" ]!II i~ ii'J V5't7j' :ra.reD Pgor 1"iha1.y cl.[ð~~ge in~1ilca.t~i!J tbi~t -t.hf) '15~d~ are a'þ'Px·.;:¡xi~'tt~ly flat=1~1Ilgo 5 3~ C1ay~t;n.s" ffi$d:!T.'~ dJa,~k €~~7'; non=Cé~l00.:r·i.í1:trQf3o ~ligh'i;ly mireceoí1i!!G ûd.th ©om.m~n 1~m;¡41\~~ >'Jf [,!lffjdi¡¡m light f;i.'2,"Jl ~lœ:re{jv..~ !ìilt!§tol1~ which :Ë,¡'~ e~~~:¡j\ti[ðl1:f flatlwi~go Rare iI' tì;i¡) l'i c~~r 11"{:¡:r.u:¡t!)¡¿,ü¡ 'b~d~ ø,J'·e <Ü~O yTI$~H~Z1t" Ml~rofo~~ils V9!7 ~~:r~~ C~y ~rAl~o with ~oma 11ght:blui§h g~ayb~ntD~1~æ0 and ~ sw~~11 ßmo~t c:f ~ndD t01Uî" !~;1")i1?J Da-cY~h """"--=~. R~.c~'!~~l .,~ j¿~ 1941"lS58Q 1'7 ,) Ow :2 ,:;a &:m.d\i ton~\) fine ¡gra. iïl~d0 >lØI~¥ light ß'TI1Y 0 'Wery œ,l~ œ?OOu.8~ InQcßra.mU3 fr.a19i;¡e,¡¡,i¡J1p llt<ìU.:¡'Uy ~.ind~T it\'! in diam9t~¡¡>ß' ~i\9 $.bund.~nt '> 6 ß011 Sand¡;¡ton~ ð'i! in CO?~ :,0 abO~f1j0 '1~'l;.J. In'.Jc$~~. :f~g= ilHmts (t]p t~J l¡'!í! in d~i1a1H¡;¡?; abì:>l1lc"'nt :Ûl llj i,"1t~~,al$ at 1941P - and 181;-9 ~" an.ël ~~ 1.ti 1}ed t>:? yell@'Wi~hbi't.\!Jrl c~.Iy lii 1~h t~.blJ~dan'~; pj~@.,;~JÞ h.~l:!'~asiôKt·:tl aJi~i ,:Ct-:~:rbona~~crt¡~ 16,~ Ga:¡;~ I)':~~ '~~ 31 (Ccm:Îi' 6) 32 195f5=.1ß7g~ 33 1S7g",lGG6 · fle~ve:ry EO (¡ 0« 18! Off e . ~:~?? ~~"~,~1j it ~'-~R fl:akea ifí3 'prBriH~::xt !;1;{; lS11.7 ~. 1~',;:¡ m.1.¡,o '¥'sr~\Í þðl{'-) ;;r~llo'W residue iu- (;:014 ðt 1~115: 0 Effective Ai~ GaT~an~te Content Depth Porosity ?arm~bJfltl % By Wai~ht 1845' 170 r:f¡S 20.055% Grade s in to . 819 ff Saudstons" fins to V!!ðr¡¡ finø" a:rgil1a.C$©ll$ 0 11g:b:~ grey 0 calca:re~nl~ ~ ~Tith 'PO 0 r ebal;;F cloo.:lf'.a.ge and ro,r~ œrôonacecu.ß part1ng~ ahowiM.gdight crOß~beddiiìg" Inoce:ranma :fmgw.ente ars COI':JlIiOi). in the l.,-tpper 30 of this inta~L Denth E~fective P~roß1tl Air Parmea~ilitz li54~ 13,,5~b Leßs thaJ:l 1 md" ~U.crofo~~n~ absent ~ 4 ~9!1 o '7~f O~2\1 O~7Q O'li1 o~f.t O~" 6 i}() Ii !P2ii Sandl!tone &L\'J in the lo'ít"er mll' of'Gore 31~ 'but lac.ld.ug œroonaceou.s pa.rting!!!.. Fa1:r iiJœJ,y \.;l~vago ind..iœtsß ~ba.t bedø aTe f1a:tljmg.. Sand graJ.~~ e.re angu.lar ·~o subangularQ compo~eü of' elm%' 8nd.whita qMrt2\ 'tfUh ~ome g~y and œrk :rook fragment8", Mi,~ is V91'7 ~l"eo No cui 1')1' re~idne 'V19re notøc11n COli.¡. at 1913:)9 .~~th Eff.ectiv~ Porosity l\.b' P~rmet,"M.l1ty 183' ~ ~~ 1873!i 16",4 17 md~ M1crofoa~i18 ab5ent~ Sandstone~ very tine to fine g.min~CÌ;o ~lightl;r a:-gillaceoi.-1u ð medium 11gb:t gr"'¿Y 0 moderately calœrooui1ï ~ com.Posed of ano~r to ~u~lar graiJ:u'I of clear and white que.rti: with a minor alOOmlt of grey êlnd. cl.~m rock :fragments" j.\Uœ is rare" PO<:)X' sl'1aly cl~vage indica. te~ tr-..a t bedm are fla:t1¡rm&> Càrbo!.}i'!.te Content D~tþ ?ffect1vePoros1tl ~ Ey We t lSse:>" 17<>9% . {),,9 Claystone" l:tght olivs ç.ay~ non=c;!tlœ:reo1uJo ClayatoIu;" medim1 gIßY~ :nc!'£~œ.lœ::r-$oWil" vaTY d.lty. Sllhtoneõ mediwn light gra~ $ 'Very ,!!'rgi1la!.)ecn:u~$ non=œ.lca,r~ou.~ ~ ere 9!ii'b-edded" Cla.y i:fi?.Jn~ìona(! Fellow=gray~ very i31ightly œlœ:raous" Siltstone aft above~ t>lith m:ra~ TOUii1.dad bla.©k cbeI't nabbleø (ì'~~ in (,U.a.m~t0r) at 'b&!Ia" Ôònglomsr.a.te of blacj.t ehørt þøbbla~~ lJg~=,1tl! t~ dtam&tí!l¡(,~ w~ll rouuded9 iil1th ~ùy ~iH IDa~;rix" Cl,a.;r shale" œ.rir. gm7¡ ~lightly mi~CaQU9~ M:.l= to §!lightly ~ilty~ :non=œlœreous¡¡ fa,lr øœly oleavag@~ Sandøtona" medlU!!1 light gra;¡~ va¡;y :fine to fm~ gra.m~df' :dlty and aZ"gilla.ceou~~ tiJUgh:tl~l Mlc~r~u!!~ rd.caceouB~ '!ß1th oooo.øronEtl J..a.mine.;') :and 'Pðrting~ of e1a.7 sba-ls and caroonaceous f.i1a:terÙ'J.L, Ears thin (up to 2") beds 0 f cla~ !!hale" ~'U.ðr;yina A and Tro?haunina. ]' aì;n;¡nð;a,:ut", 110 . 1397=1910 " 1910=1915 q . Sande tone s.~ in corel!! above" '¡¡l:l:!:h 9ma11 aIrJOuilt c~y ah2..1ec :!'1o eamplfL. Core £..epth Recovery Description 3l.~ 1915=1920 ¡¡ 5 ~ 6$ 3 a5!f Sa.nd.etone~ "salt and pepperu, fine to medium gæain~{i,¡ silt,. and a.rgillaceous~ ver.¡r oalcäre01.U} ~ composød fn? 8ubangular to øubrcn:md clear and ~Jhi te qua.l"tz.. with gray a.nd dark rock grams ~ Dep~h Effective PorosltZ Air Pem&'ðbi:U.t;r.: 191 I 17..5 045 md,( cm6ked; o s6" Interbedded øa.ndstonsf¡ 3ilhtonse a,nd c~yøtv;¡¡.s" \-J1th e. few œrÒOna.ceou8 laminae" O'Sf! Clay shalsÐ lI!adium dark gray'b 1ifith a. f'ßw silty micaceous lam1nae~ Very poór sb.a.l¥ clea.."¡age,, o 'Uff Siltstone, medium light gray to light gräy¡. very ca.lca.reoU!lp with sa.n.dy atr@aks ~howing some CrtHJe..·· bedd1ngo ~ficrofolS111 absent ~ 2110" Cla;7stone;:, meù.iUII'] d.a¡'k gray~ !<Iligh.tly. ca.+careou.e& with streaks ð¡~µt~y s~1~ym8dium graY'elai:ha~~ ttllwi1"iylf 'bedding~ A 4tJ sec~:i.Ón of ~r'ng-bed.ded" . medium light g~y ~lqa.reoU9 siltBton~ h present 1 J bélòïi the tot) of the' .intervâl~ . . . 35 ·19~191.to 0 It> I' 011 Oi7il 2Í!1" 4'10" 3~g" .. 1'6" 2 ð 5" 0'4" o '5t1 1 t 10n 36 191ICÞ1949 fJ 7r, Oil S11tstone~ slightlY sandJD a~ a~ ba~é ~f Cor~ 340 Sä::ldat0::18ø :fine gra.1ned" light g:.-->ay(O vel':r œ.lc.a.reCi(lS~ massi..,e~ grading into Sandstoneç medivm to fine grai.."led. medium. gmy 9 va?:! calcareou~ ~ with fair shaly clee;vaga; soms carbona.= ceoua partings in upper 11 n :Beda a.re fle,t...lying.. Eff ect i va Air (',ê.:rbona't.e Oon ten t Dept~ :r:or03~;:r Pemeabili t:r ~% ~y ì(e~t I9277 13~öp 1035 mdú ~5~lO? Cla78tone~ medium Mort:: gray to medium gräYe œlear= $Oua slightly to very ailtT"  11; ~tre11k of f1nø . gm.1ned øe.nd8tone '!t>"ith œ;z>t-onaceou!!I pa.rt inge is present at 1929 '! ø Sa.ndßtone,¡¡ fine gmined, light gr!ð:;¡f) very œlcarOOiJ\s with poor ahal.1 cleavage. a.nd 8œttered $¡>bonAcoou.s partings., A 112ft S:9ction gO below the top of the interva.l cont8ÙlS a.bun&m.t disc aha;ped :rounded f'mg= fÏØ" . . ments of mß<U.um dark: grey zhs.le~ ljlb" to 1~ m d1amete:r~ very rare scattered l'oun.deð. sMle fra.gm!.1}n'Îis a.re äl!c ;presßD.t in 6« 1n.tsr~l bel¡:) \!J th.e :int~:fo:r~· mational c('jnglomars:te~ ClaYßtoner> 811');.19 sa abovs~ g;rediug 't\} SandstonSt very fine gr,aineds very ßiltyo light gray, caloareou8owith ~light cro~ab$dd~~~ ClaYßtone as ab~vao Sandstone as abov8¡; Eff sct i ve Denth PorO!3it¡r 1937 þ 110 1% Microfossils ver,y grading to fins gr&inad sandstona~ Air Carbonate Content ~s~aabl1itz 1, By Weight .., - - "~-'''---'"""''''''~r;--~-~-''''''''''''''''''''' .unpemea.bls c.:.'t.o (')/} 1'ßrø" 180 1950-1960 b 1960=19ro (¡ 198'9-1~90 u 1990-æoo I 2000-2020 3 Core . . 210M ~l1.wbone(, 'Va:,;,;! f3L§ grdin~:dI¡, vr;::;cy ¡giHy 8.:nd 9-x·gilla. CSOtW. slightly ca.lœ!'~ou90 with :fine c1'c~i!llï~dding show by slightly da.rkeZ'\,/ slltiex' :ùitysrs " 2123 C1a.1'stons¡) mad!,. da1k gra7~ with a.bundAnt lenSêø and thin irregular discont inUO'l$ bed! of medium gray sandy" aiUø'tOD.8" Microfossils ver,y rareo Cla,. shale with 80me eUtøtonoø Clay øhale with ømaU 8mc)1mt siltatone and sandstone" C1a;r shale with bluiSh er.aT bentoniteø Olay sh.e.le with traoe sandstone e.ud bentonite.. S11t~tone and cJa.1' sœle" med1œ ~1'k gray. non-œlœ.rsous" Dept~ ~covaQ' 31 2020-ro35 ij 140 0" 192- Sa.nd8ton8ø fine gr.a.1ned. ver;¡ silty" medium light P1'e ncn=c~lcareou~.. with ~ommQn c.9.rbone..~eor...f! ~rt'" 111gø and 1a.m1näe showing crossbedding" Gredel into 304. Cl9sYs tone ,. medium dark CT:S"3D silt;r a.nd m1œ.cSf)'Ø.@:> non-œ.loareoue.. Irregular làm1näe of sa.ndBtone and. siltstone are pre.ent in the lower 2/3 of the 1ntenal" 5'3" 1ntÐr~1nated Bandstone. siltøtone and silty clay ehale. light gray to medium graYfJ CälœreoU8~ 0'9" Claystone" medium ða1it: graYi> slightly silt".. 11011- œlœreousp with scattered œrbor:.a.cooulI!I plÆ:.nt fragments.... 119ft Claystone as above. with thin 'beds and laminae of coal. eh1ny' & blacks with sba.1y clea."I1Sge," 1 ~9tt Claystone as above" Microfossils absent" 38 £O~2065~ 9 & 6" 2065-2:>70 5 2070=2080 i 2Ogo-2100~ 2100=21)0 ¡ 213CÞ21ltO i 2140-21~ ¡ 2150- 2160 I 2160.-2199 f ~ Depth 2199-2a>7 ~ 39 gag" Cla.78tona a8 at bale or Core 31 above" with a 1 ~ very si.lt;y s8ct1on 11 a.bove the base" 0310" C1.ä;r shale!! b1a.cke ca.r'bOI!At}8oU8ø w1th ~J.y laminae" Microfo8811s abaent" Ola,. Bbale y1th øœ.11 amount siltetoneG Cla.;y shale" Clay shale with some sandstoneI' ver:f f'~Ð grained" medium light gray. ca.lœreou.ø ~ ClAy ßbals with smll a.mount ØU.t8tonø., Clay 8häle with ,maU s.mount ø.e.ndßto:nð and tracé siltstone.. Clay ahale. No ø.mp le Q Shale a sand5tone and sUtstone~ ea.mple¡¡ a.re poora as they ccnte.1n a l£rge a.mount of recirculated. ma.terû,l,. Reoo very g 9 Oft 583" Sandstone" tine to TSr'3 fine grained" argiUa.ceoœ light ~70 slight3¥ ca.lcareou8~ m1cs.oeoU8o grad~ to very fine vary silty sandBtone lilt ba.Be" Slightly òä:&:er G al1ghtq œ.¡"~o¡¡a.ce'ra.s part tng::: (3t'~1:ì cro C1:~ . bedd1ug~ 1.... 2201-2220 ~ 2220... 223"' ~ 22 30.., æì.¡Q e 2240-22!;O a 2250-22a, ~ 2260...2270 9 2210=2200 Q 2280-2330 ð 2.33O=23l Q ~ . . IDf:f'Ðctiv~ Air Cárbo~to Cont~'\; Denth Porosity- !:~_e&?ili.·t:[ 1b 1)'1' 've4ø'ht '2ã5õõ ~,''' 305% Imperm-.ble ---~2¿~~ijJ,~--'· 219ft Siltstone" medium. ligbt graTo non..,œlcareous~ ¡.dth mad1_ gr&7 chI' øhale laminae 1ncream1ni; from absent at top to about 2/3 of the rGck a.t the base of the section" Micro-rossill absent.. Sandstone as in Core 39; 'With some shale and siltstonsfI and a. m.1no1' amount of c1äl' i1'oustone" C1aT shale" with traces of siltstone and øandstone.. SandstoJu,p fine grained" light gray~ non-calcareous.. sandstonep IUt.~ne and 0111.7 sha.1e. Sandston. as a.bove, with 60JlÐ siltstone and. cla7 Q~la" Siltstons~ clay shale and sandstone" Sandøtonat) t,me to vé-q fine gra.ined. "sa.lt ?nd pepperli r; nou= to slightly ce,l!mJ."~'l1.e: !it minor amount of clay shale and siltstone a.re a.løo pre.ant", One piece of siltstone has very tineca.rbonaceous part:f.ngso Clay ohe.le with ailtstone and øa.ndl!Jtoneo Sandstone", with soma clay shAle and siltstone" Des crt])' ion ~ Depth Recove.!l l¡Q 231()-2341 ~ 1 ú 0" 2341-2360 ª 2360-2310 ~ 2370- 2J30 ~ 2390...2100 ij 2400...2410 Ñ 241.0-243) ð 2430-21 ÌlO C 24l1o-2}~50 6 2450~24W ª 2460-2470 ~ 2l/.70...248J ' 24&1-2lJ906 2490-2493 Q Clays tone It medium gray Ð ß 11 ty in upper part \) slight17 m1cao80'WI, non-calcareous" Fragmental carbonized plant l"ÐiIlaine a.re coltlmonQ Smau cla>y ironstone nodulsa are a:trn.ndant :from 23Ì1O g to 2341 § <0 ~1iCrofOS81lB are ft!,re" Clay sbalsowith some aemdstone and trace siltstone" No sal11plac Clay shale with tine gre.1ned hard 8Mds'tone and slltst@neo .No eample Clay .balev fine gra1ned sandstone and s11tstoneo No sample 01&.7 sœle with fine grained. ønd8tone trace siltBtone and clay ironstonco No eamplec Sandstone~ fine grained. with caT shale änd txace silitntoneo Clay shale with minor amount aUt.tone änd sandstonso. Siltstone and c1a7 ÐhBleo C1A7 lbäle" No sampleo Core Depth Reco'Ysrz 4l21493=-2!Ð5~ 10') Of; 203U Ole.,.. abälGe medium ð.9.1'k gray\') ßl1ghtly D1œceoue non...œ.10ì\J."80U8e with poor ahe.ly cleava.ge-o ..<\. peleQþOd (Volsella. 'i ap~) _9 fOWld at 2},¡·94'... :Bed. are f'la. tqing <> Gradel!! to 43g" Inter~tnated medium g:a7 clay shale and medi~ light grG.:¡ 81.1t sba.le9 non-œ.lœrsenlsr orQ..bed.ded~ with minor amount of sandstone in lower part" 311" Cläy shale as a.bove£> with rare ~ll lsut1cles of medium light ~y siltstone" ~Ucrofc8Sll epsciss mrÐ) YeZ'nlSu.llin~i~ F COmID.ono 200 2~:; ~=2510 ~ 2510=2530 ~ 25 ~...25lK> u 25!.;o-25fo ~ 2560-2510& 2570-2£00 6 2€co-26:tD e 2610=-2620 · 262CÞ263) ~ 263CÞ26rog . . S£!,nd£r~Qnf} :,..ri tV. som~ ~läy i);,h!al~[> t;¡:~¿·çe a Clày sha.lø 't1t:1:/¡h SŒ\.11 amctul t ¡idJ. -I;.,'i:cma < Clay ahale" Clay 8Mle idth sma.ll amount _:ad-stone ~..nd siltfðtQ¡u~o CJ.&¡ øbaleç sandston-1) and d.lt;¡tons.:, C1a7 øha.le with emall amount øndstone e..nd ariltf$tone" Cle.7 ebalef¡ sandstone and .u.ttltonao Clä¡ shale '<dth minor amount Sðndstone.. &nd wt th trace clay øhe.le> <J Clay sha.le with eiltøtone e.nd ÐandÐtone~ S'ample".iJ e..:re 1'001'0 $,9 they con~1n. :It la.rßa amount of :recd.r¡;m.läted ma:ts:r.-iAl" ~ ~th !1e~º-ve~ 42 2610-2683 ø l2 ~ Qrt 26s)-21&> Q 27ßO'.o>2~ ~ 2g20·,~2g30 (\ £fire .Dept,þ 2B~2g53~ 1211 011 .RS130vsq 43 ;235:;"2g60 · 2S&:>=2Sro ' 2SgO=2300 § 29CO=29lD 3 2910=29JJ >} 29 30- 29lKì ~ ~q"^=:,:'ð~1'\ ~ ~ .r 6fV ........;¡ :.~¡ 2950=2970 ~ D~~cr1p! tOE: 5q6q Sa.ndltona~ very :t1ne g~11H.\d" 'rrery argilJ.acet)l1Œ! and silt,.;) slightly œlO2\,raou~ g~ding t,) fin~ gra:tnad a.t 'bt&.aeo The sandi$\ (\o~·o~3d of a~..u.1.a.r to au'b= angular gra.1ns of clea.r qœrt~ with some 'Whitf.l qwa.rt~ s,nd g1:37 2,1:u1 œrk rock f.ra.gmenft;œ ~ mica i!13 raore. Rära bed~ of' cla1'stons", ~\'t to 311 th1ck~ total under 10% of the r't)ck.o Cro9fi1-Ì),adding" œ.~ 'bOMiC60u8 pa.::t't mgs$ and <Ì'!o f$'W small c1äy 1I'Qnßt~)ni$ ooncret10!1iÐ a.re prasent", Cla,ystoneÐ medium ðð3?'l\: g~yv ID.(:Hl=œ.J.œ;reou9ø ~> COllDOO1ðÆ?1 to poor t1Iœl~ Cl~,lf10,g&,. with räre øilt 1.mft1ne.$ $œtte:r~d thro\1,gÏ1Ou:t", M102~fose11a ~b$ant~ 60611 01&7 ehä10r. aand:aton$ änð. ,iltstone~ ÐämþlæÐ a:rÐ pcor~ as in the i.r!.teM81 1mmet'liateiy äbove Core 420 Clä;r 8häle with sœll amount ver".{ :fme gr~insd &;ìndstons in lower 10 ~ ~ ~l~)1ij a.re ])001" through tb1~ 1nterval~ th~ i31ee't:::l¡:; ;~g indi@ata3 a sandstone :from 2000 '4 to 2830 ¡, ß Sandstone!) fine grained., CläY2tone~ madltw Q&.rk €::;œ;¿¡ ¡-. :¡¡¡~n=C::"l1©l\),4'I!SOMÐ i:rregt]lal' :i'ra.et'::lE@", :!!1.ftI 1 ~ ~'ð,:~t i,;)~l@)., B t :::842 ~ ~d 21551')[; cont.~1:n a:bmvò.ani¡ i:!1t.'¡)l"Œ~2~'Hon:!; of' ~iU" a.nd -~ìJ c..~¡-·Oo¡¡,a,ce¡o~. :ç~Jrt 1nga" Ligb:t, :redd1~h brem 1ronJ!lt.onI.'Þ conC1'êt ions sr~ ~:Om'.l!n@n from 2g!~~ ~ to 2845 o~. Mli\':.rot(ì\~~'.l it'J@©i0!! are mì"'ê" V~:nl~11,,~ ~oide! F is a.lnmdMt" .,. -................~. 511 tøtone ti:!;th some sanð.atonø and c].äy shale ~ Cla.,. ahale{, with eandswne hi. upper 10 ~ and ~ilt\\!tone in 101¡¡'eJr 10 Q ~ Sandston$F fins to wr:r fine ~1ned" 1dth. iì!Omtô1 c:w.y øla" Cla~ !ilhaJ.Ðù ldth Bome í!lltstone and trace ~d.$ton5<ó Cla7 ~bale with some ~d8ton~ù trace 911t~ton$ð Clay ehale with aome aandetoneu trace ~11tstoneo Sändðtone ~¡fith oom~ clð;r ehalÐ and tnt<O~ siltstone" C18;y shale" s11t7~ nteð.lwn dark gm1'¡;¡ and ea,nð.st.o}le~ O'(l@) pi~©" of' clay shaleha~ a 1¡4~ ~ina~ of ~ndøtðneð JO';'!"t ~.>" ìà. Saadatone aa a'boTe, with rare ocattered small trl"eplar patches of medms dark gra,. cJ.a.y sba.la(¡ and. occa81ou.l f1'&gllentø of œ:x'bo_ceoU8 plant ~e- _iDe.. A 3\1 eroS.bedded iJLterval at 3057 G hall dips "p \0 2"f.. .A.). mtenal of ..41_ grA7 "17 œl- ...._ oJAiL,. lbale with. .terœ.1atlo.e of tme ...... ua..... t. p~_ at J)&) t: 1t 18 =401'- 14. '" . 1¡a- 1qeI' of ___ e1a7 .-18 with the ~~~1' taøa.. ....--lW ..11 patchee of aM... .-tae4 ......... At.,066· l' a 2ft _-'ton .. ...._-",... ..._ :uc- __ 111',.... aa4 _.. .. "., ... .t.. 14. . lew -.u (i-1-) ... t... ., ... ..... ..... 1~' ..., .... ....... ".......,.,.t..,.,. *1IIM *» cut. 1M. ..... .......,JI.. _... .......~ Sa ØC1Ja.o £c!!:! ~~h Recovery 45 ,:>47-J066 ð 19 0" 302O=3Q2!G Core - lt4 Depth '$)21- J>47 q Rego'le1:'(_ 20 u o· SG.nd8ton8ft tine gmined¡¡ light gray D 31~htlT to moderately calos.reouø. vary al1ghtly øilty: grains are compoled of angular to øubÐ:1Q~u1a.r clear and 1thite q'Wu·ts. oftæ :frosted, w1th r..¡¡¡,rQ, &iJ.rk rook gra1D8~ .108.0 pYrite a.nd gläu~n~ta eu·, absent" The sandstone 1s ma..s1ve~ oC~8:lonal bedd.ing plane breakø suggest tœ.t the beds are f"lat11ing" Ho 0 i1 odor _s noticed on fresh brea.ks~ e. very pale straw=> colored cut a.nd very pale ;yellow resid.ue \.¡ere ()Ììl~ aiDed. 1n Cel~. from 30 JJ .: a sample from 30 10' ~'?Ð DO cut and oalT a. faint greasy stain &1 residue" A brow1ah Tellow calcareous cls.y ironstone nodule e.t lean al large as the d1ameter of the corell and 19 th1ai:. is present at 3041 t; e. smaller (1/4" x 2ft x 1") yellowiBh brow. non-œlœrsous nodule is 13r8- HIlt at 304~P.. ~1J1e DO~lel long axea are rough17 hortlSOD. tal: their contact 8 with the aurrfJlund1ng UDdatone a.re lbarp" Effecttve Air Carbonate Conttmt ~th :Poros1t7~ ?emesb1U.t;y --1.!!l Wei~~ j)2g I 11.0% Less tban 1 mdq not tested :JJ3Q8 12~52 3..58 g,,9~ 3032t 12,,7 no plug :not tasted ':>31p 12..g 7.5 md", I\!i 3036~ 1303 17..6 ~ 303S1 13..3 no plug te J>~ e 12094 1.. 7 3042' 15..2 3500 30~' 13~6 6..4 30~' 1108 1.6 M1crofossils absent" ; It 6,,04% no t tested " II It ~ 2970= 30f:.'O Sand3tone~ fine gx-a.ined" friable;; 1 €::,~;¡ ,\ \' with streaks c1£..;¡r shale in upper pal't .~d.:!!J'1;¡OIM¡g~ very f1n:a gmi.\'4~dt C&lcareous~ hardere more argillaceous t1l&1 aboYe" 1n l@war 10 i¡ c Sandstone as a..bove~ with soms clay shale and $iltst@JUh . . ÃkÓ D~=-· . . §tJ. ba.~aÆ¡t{m~, fir;!(¡\)~© V'~r!l fÙ,-e ,,:~,;::¡:¡, ilÎ,'!; ;~~~} F) ,~ . . -*:!.S ..1...:[j ~:r¥~"!..'}r 3:2(S5 ~i '.... '<..) ] \()~;æ ~ =:;-::1 ~... ~<I " 7'~ 'f) '~': J ¿,' .L ;()[, <~ " '¿k '\:71 t:h :~, f1t::~},::L ~s: ~T; ('.' L·'::1:¡ ~': ::~,~~Ul (~',·3 t<~, ;:.), ~.~' ')j':'; ,-~~ [c; ] 11 ,~,:jl.3: ,~ 7'.a:J!!,Tj ~: J,.~1~:f:'j G:;r:'~~··~( ~J:tt 't h. '-;::;;:;'~;', ,';r 't/3,. F1.irA :,:1 :l~t:~:: :.7;'·-l::~~ ;:.ill .~f$' ~ü .;:þ d. :t-'l..1r~ &~i;..t.v~;: 7 '. '.'-'; ~ '.~_,:;:::;. ,f "{>'e:-:;:~-;~ .~3.. bo \7,2:, ? :J.n '~~~,~;r¡'~>ÜZL-: -~~ '.12'!t ~~~. ~ '1 :~;~t~ '. 'f't) f·r;; E:'3 ~ll:~ (:'~m::r:e. };~ 33~ 1 ,t !'3 ~t '{ \ .".~ :~ :". .~,'" GOr-Ð Deroth ---"- 49 ..,."'..... 3J"':;·-"'" ') ".r' "'-'= .,¡?....' Jo-. "),,.- (.....r 50 3259-3279 ~ .3219- 3~o t 3290= 3310 3 3310- 332) ~ 3320= 33)) ~ 3330~ 3300 ß 33ßo.· 3440 ~ 344o~ 3'+50 f 3l¡·:;O~ 31~€o t 3460- 31~64 i ~-ore ÐS'Dth 31~l¡.,. 34S2 n 111; G 0:1 2~0ì1 51 . R6cove}-~l ro :1 20' 01' . D.~g~.;l"'i~.tiQ!: s.a.ndaton~o V?Jr:! fine g:rain9d~, sil'1;y a:o.d argnlacootJ.îj~ mediUl!1 l:lght gray~ llOn~cal,~a.raoD.iS" maaa:J.vè.. Sa.;;\d "graine aTe angu.l'ì.:r to i(nJ.Þm~~l13.r clear $.:D.:l 'Þi'hi te quartžç òftan fTO~tad: IDe,ny arø y~llowiBh, Darl~ rock f~~anta s.re :reI'S ,1 .m1c:a'D pyr:1:t~ 3.n.d gls,'.lC(1;;:¡J:lie 2.1'9 a.bsent" A few cro~sooð.ded ca:rÌ)(jna.oao·!..u~ la..mir",':1.G at 3240 I) dip 12°. a.t 32Sg. a few car~o1l1t3.coou.a lami.'W'7e a.re flatlying" ß. fS'lrJ :f;ra@::1~:mtz (1/4" 1/21;/ i.-~ d~ star) .'!:1.nd patchas of madÞ.;¡m dark grs.y Db.;r 3t~le are pTe'>3ent iIJ. the sant1i3tone a'i; 3,~71 Q 0 A pa13 !!tZ'a~.¡ colored cu.lt and pala yell!H1 re:ðiduB in CG14 were pre- 8ðn~at 3240; ~ no CU'!; aJld "'lery faint g:l.'saa;;r ~taL'>l were record.ad a. t 3251 i , Deoth ~i!aßtiv3 ~o~sit1 3240 iI ¡:L 3Bf(' 3251 ~ 9 ~ 6g M!crofo l5i!'íi:ts ab:aant.. ~ir~?~rm$ßbil1~Y I.e~B "han 1.. rod, Im:permE$.D h Sand,stone as above; a g:i!'01.i'þ 'Of grayish brow J;10n~ œlcareolw clay' ironstone nodule'B at 32'75 Ii a.rrð 1/1~ = 1" diamßtet'. wI1 rounded, ~¡Ji th sharp contacts with the awrou.n.diug sand\9toneo Sampl,~s from 3263 ~ and 3277 i showed no cu.'t and a. vary fa.int gZ'88.sy ¡,;'!;ain in CC14· , D~th 326 3 ~ 3277 (. ~aCl"OfOBBib !X!fsctivС;.1Torqaitl 7 ,,9/" 8,.g absent" ~iTPermeabi11~l Impermea.ble If Sandstone with clay shale", San.dstonan vary fine gratn$d~ argUlacecfusQ ~ediwn light gmYD no:n~œlca:r- SOU.! 9 with minor a.mOì.U1.t clay shale in bottom 10', ClAy shale with minor am01:ult 6a.ndatone and tracB silt.atone, Sandstone and ßiltßtone~ ~ith minor &~Qunt clay sbalav Clay îJhäle with sa.ndatone,} va'!:;! fine gr2.inarJ.~ a",;"gUla.ceol1S'~ rnað.il1l11 gray hard~ non=calearaoue. and siltstonsc Clay shale;, v~ry silty Úl lower p,tL1't~ \d.th sMll amount ailhto!l€!.o Clay s:Þ..s.lso tdth m1..'1Or amount ~and.6!tona0 fine to very :fine grained! light g:ra.yl' non=œlcareousp tlse.lt and papper"" Clay sha.la and. sandstone, very fine grained, light g:ra~-9 non=œl,œ,reOll!L No sample" Re!Jo ve:ry 2 qo It Sandstone. fine gratued ) mad.iwn light gr'.;;Ì.:.'f. a.rgil)&'" ceouß0 very ca.lœ:rrecH19. masE:iv'0ge t:omposed of clear and white quartz gr'<;!.1ns that areaJ.go,;Ù.a:r to !àubängW.al' and often :fro3tdd; dark roæ t'rngmenh aI'e :rare and m1œ.Ð -pyrl ta aad gla.uoonite .a:re ab9snto SandBtÕne ä9 above~ but ",ith abund.a.nt madium äa.%'k gre.g carbona,ceoua and argillaceous laminae" dipping O~5 0 The 9andstona coarsens with dÐDtho '\i!thin th1s :in ta:rva.l <} . . 24~ $)1 (Cé)rrt '1¿l) 5:2 4l¡<l''''''~3¡::;f',~ ~ .QC' Þ"'J ¡:::ê? .J;J ---1'\ "1 ·511 ~ 'I ','" . 'f- '. ''',' <tt",/J.-'./.¡w,. . '51} 3510= 3518 'Î 351~352gJ ~¡;:;2~3' !)j." ,.1 ~... """ ....~ . 1 ~O)¡ gJ 0'; 20 G 01.1 7°on . '¡O,'I! t~jr!~~ ¿¿¿. '~~ e,~! <i¡Jl't.CJ ~)'P ú::: t:h,~ t-o nt}''l1:=---C;::11j;;&;::raðor¿ðf, gj;~din·g 'to;::' Bff·a(;';tiv~ á~..J: Dz~th Porosity ---,~ --~~ 31171 :]'-'~. 7 '~6~'h ' Se.ZJ.\:Bt('n\~ la'B $bove 1n:rt ''?1£1'rj bt:¡\: !.1.1~g'h-~ly includiu.g 0j.:C:i.~)_ ;~ ~~-hc TI~:3;. t~ C(}nt -ë:'zrt ~&. lìlo)~61;~ht j~~:;~~~"~rt~d, ~~î¿{; f~1 icro Bff6Ctiv8 P;d¿"'C~j.~- 12 :j 7~~-~ft-=- ~ .g -ti i 1.'B ,::1. bs '~r~t :- .f if[}. '~g ra. :tflt~ d ç .'-d!'}=' '3m ~a. 'b i :U. ~~Y Imp e z:n *" 'b 1 ~ Sa,r!;.Ü$1;Ona" 'VerI' finf! g:m.in:ad'e ðrgilla.c9o"U.~ a.··.H~. silty;. me.·dj,::{~:m li.gh·t, gr-ay í J1('D.=.'e,,':!1-œr8!;)1.l~? 1iJ~"s:sive{< Sand. gr--a 1.n9 Ð.:rea.;n,guJ.ar to ,nil¡,=a.."lgular ¡; uí3ually with :f:ro~'t~d !ìürfa,~M. \'kD.d. are cO:l1noBad tj:f cl~¡, rp:ø,l't ~ vi th ~ome Û'Jh1 ~é q.u.a;,f.'~ 'Z and darle 1'0 ,,~k :f:r.a.g>= ïU¡¡m,'t'Bo Wi~Æ~ê þyri~Ð a:r;¡¡; ß";)¡¡¡.eiO:tc ~t,~ ~ffectiv~ :F¡c;.~)a1t;!.á1r PaTm&~bi1iti[ 3iJ,ó'{' 10" 7"7(' Imp~ImУ1bl!'J ì\-iicl'"o:fosai18 abSSD.'t, ~~nd3tQZlÐ ~3 ~ CO~'f!~ 52 a.bð..··T~;-' ln~t mo,¡~.::~r::~t~l~r œlct?~r:¡3o"t~ ~, D*"th Ef:factive Porosity ~~i.E. Pe1'!ì!.~1!J..1itl: 3497 q ß. 5~---~ ¥:mpern~a'b15 3~OM Ss,.n8.:ãtf'..:¡u1t ¿j,g .s'b.')VG. oonca.l!!tu'ecu!¡¡ '!Ø1~h thin (114~ to 2\'1) bed~ cf madium fu.!\rk gr-a.y ml$,~tlDUít c~yston$ totälin,~ 10% ,or th3 !i$ctlorL Faint ~:mi¡'1.S.'Ì1i 1<"1. the sandstone MllH~t1me~ ~b.o!;i ~Ug!~~; 'c;r'o~Bbeddmgo 1000~ Sandatön~ ä~ ~ top of cora, nOTh= t~ n©dal~~eJ~ eal~reöu~0 ma3!iv~, DEm'tt\. Ef'facC't1.v8 F~rosit:y ~~:Lf' .?e!'J!lea'bil:i;!l 35ÒY ).¡.J~'"---- !.!.npa)1:'m~ble Mlcr~foa~ilE aba~t. 13 à ~,! Core 52 8P at: Sil't;i1.!!;(}:;¡e,) medtu,'11 #si®:Y,) f'èÜf:tt1;y' 1e.m1na~.edø with a 3(4 ~a.;:;:·~iop. of ffi'(;H11um dbrll: f;;ra.y bt!3T=1..[1¡¡¡J.n-ðted. s:Ut= trto¡}.·Ð and. m iC.aC~OUiS ¢IAy ;B}J.k\le .s,~ 3511] and twc3" sect iO",,\,3 ~:f maðJ;:wn dark g;1:!!.~"J1-nti~;cElœZ"~01l1!lc1aY8tona at 351,2;J 'J Thø ';1:1a.~r=~l1t ocnt,a·otf!! a!'ß fihi1.:rp an.d flat= qing" S:Lì.t¡;t<)n:ï;1 g:m.d~\1I W me¿ti'!1m d,ark gr$.;¡r~ 'W'al7 rI..l""':..,..""..... '!'."> ".,'" 'ë';¡ '1--....."" ...po ......"'...."'. '.,~ t'1 ':/1 '" ~)..1-, A"'" "'~'A''''= ~ l"""""-....,..~yy~&;)v ~v~~'''""O,.A. ~i3¡¡;;> v~ ~,A$.J,.t;.I~ ,Aê'_.1..., ..} ·,'¿"'~.r ~&t¡ily,¿..¡. a.i~ con tent $1; 3511~ ~" Mi~rofo3~ili! "'l~:ry ~n> )\10 ~mp le" Cla.y sha.le wi'lih mmor ~11e¡U.nt ~a,nd.iltð)ì).~, 25·, Gox~e E!!i?th ,RS£i' va11: 55 351tl:o 3561'J 20 U Qfj .~..<;¡:;¡61= ':t»QO Q .J.J' nt?~,-tJ ...~~,... -~",.. "!'7IJ"1\:~4.:õ'" c~ ~ .r.. ./.. COl'8 lL~th ;6 . . ))'3 ~ ¡:;i.:.i~ t.;~E!. 11q3~ Sandat~n9B vary f~~a grain~dø ~ilty and arg111a= COOUBÐ IIHId.1um light grayo mBa3i~>i'eÎ' with faint lamw.e ,œu.sed by coucentr,9,tion of a. small a.mount of carbon-~ceoul!I ma.tar:1Æ!.l" Sand grain!:'! ars simila.r to tM~~ :tQ Core 52 aboV~g but clear OX' greel1, m1oo. fl.äkeø {muæJç,o vi te and chlor1 1,;e?) are c~mmon c. D~th Efre~~J~~cro8itlAiF ~Perm~bi11t1 35!50 Q 9 ~ 7'f::t Impemeäble g~91i Siltstone as abov8~ but with 5" to €r~ I?H~CU,ons of 1nter=-lam1na.ted. carbonaceou.ø miœ,ceouiI partings and madium light g;œ:;¡ silt sha.l;ß!j\ and 1¡2~ to ;4" beds of msð:-iUil'! œr'~ gray cmy shale whicl1 me.ke up a.bout a. qusrter of the int~~L ~th ~.1!e©tive ~ol'Os1t",y :11! Per~~b1litz 3557 u 8.. 2};J Imp ermsable Microfolsile ab8ent~ ~ds tone 9 very fine gre. LTJ.sd[, mediun light gra~p nonœl,;::a.r!iolla p very- silty and s.rgllla.csousøw1th 3mll &!IOuut c1.a.y $Mlso }10 Iiltmple-> J53~ 3602" 10 ü 011 ~e<Ctì !!12 ';lc.... 7:'= '!1h~n 0 ~J(~J¡._ .;I-."V 361(>= .3650 ij 3650= 3610 ~ :5670= 3680 ~ 3600= 3690 :) 5'9" Siltston9Q sandy" medium light g~ðLY() :0.0]1= to. slightly œlœreou.B" mn.sI1ve" ~d th 2('1 intoI"17àls of med.ium dark: gräl' non=calCäreou~ c1ä;rstone with conchoidal fracture at 3596 @ end 3597 q ~ ~_tll Effeotivo ~:roa1tz ~r PermM.bill~l. 3'5§""bi 70 J3Þ Impermeable Interbeddœd medium dark ~1 c~yaton~ änd medium light gM1' siltstone; beds a.re 1/git=11. thick~ usœllywi tb sharp contactiJ'l Ð Dome I) f ""'hi(\)h resemble brea.d 8ha.lll)~ ripple mark." SlltiBtona as aÒOTer¡ with a 111 cls.ysto!l~ bed at 35998 that cont.a.1nil sha.:rp inegu\a:r iv.tarœlat1eu:u! of .ntaton~c The lower 5" bns carbolm~'a'n'!.!!'Io arg11la~ ceOU!ð aminaSQ Interbedded clÐ.ys·tone and 131lhto:aeo Gonta.cts are sharp but 1:rragulal"ø a.nd many dip fStaepl;n some tragm3.l'1.ìs of shale are rollllded a.nd emb-ðdd.~d iu ølltetOD.S to form aD. tntrafomat1(,')na.l (oonglomerate., A 1" nodule of marcasite is alBo })rsøent 0 Claystonê as above." Mlcrofo~~ilø absento 1:)0" 1B 611 li3if Qi¡6t)t Cla7 8bale~ with some sandstone and sil~stone Sandstone() 'dth trace siltetona and clay sluÜetJ grading d(nm.~rd tQ clay shßle with trace siltstone anð. sa.ndstone" Clay sœle with small e.mO'Wlt sand.stone aDd some eiltatona in upper 10· <> Clay shale and siltstone wi~'Ì;h minor amount øs.ndstoneD Clay !ha18~ with minor amount sandstone and siltetone ~ one Ii 1e©e of sandstone 18 slightly ca.lœrec.rtlíìJ" 26", . . "\6Qoo" 170"7 a "",. ,?" '" 'i t Sandstoneo very fine grained. very silty and al"gll1è.~een:t~IJ mi9diUJ.i ligh:t grayo nO!l= to s11~htly œlœ.reouí8r with some siltn\ì;ons .and 1J~Y al'1$'>leo Core ~epth Re<eoweq ~7 ,...1 3707= 3727 a 17 IJ Ofl , 515 3127 u_ 3142 e 15 ~ OI"l Sa.nd~rtone ~ vary fine gra. in<9d~ very a.rgillaceouflI and silty,,' medium light gre.y f> non,œlœreou8" vø:q slightly micaceous ) ma.sßlvl3~:composed of' ð1.1lg-,;¡.la:r to subr~ngu1ar clear and white quartz with 80ms da~! rock fragmsntso Mica is mreo The 8i:lctt ion :from 37129 to 37141 is slightly darker\> and there 18 an irreguLar 1 ~ layer of med1,.w d.ark gray clðys"Í,one, with scattered fragments of cJAystone immedia~e1¡' above. and bslo~lI it!! at 37ll·P.o Depth Effeotive Porol1t~ Air> !,eni&~;~iH'1:: 370gv 1001.% Iropa:r¡ßaabl~ 31180 9~1% ~ MicrofoBs113 ab8ent~ 3 ·6!! of intercalated sanð.stone and shale a! :til lO1Mer pan of Core 59 beloÎ!l is lä'Oelled. ä!!l being :part of Cor$ 57 p, which was stuck :in the C(;)i'Ð 'barrel and reM covered with Core ¡50" g~3!'f O~7ît 4i6" lag!'f 59 3742= 3751 íl 151) Off 31j6t1 1 ')611 5aorð l~ HO« Oi16" Sandstone a.s a'Oo".o Depth Effective Poros1tr A1~~~bi11~l 37;¡J ~ 8..9% Inrpermea.ble Cläystone" medium da.1'k graY I slightly iIliœ.t;:80US$ with scattered speaks of œr'bo¡w,ceous œt'3r1al? Sandstone äl!l. above. but m'th short in"C'!1'1'Iala tlat- lying or oroubedded lam1na.e" ,A føv dh!ß=shaped pebb1ei!l~ (l¡glt to 1" in d1e.meter) of mítdium da.1'k gæ;y claystone are :present 1 v aOO'19 the OOØ8ot this in:tanal" C:La1stone" medium dark g;re,yo ve"I.'if a1l1cyt' u\)D.=ca.lœr- eoU89 with irregular fr,Qcture~ Microfoesilø absent.. Sandstone Soø abovet) with ä 1" lay-e)r' 0.'1 dh!çH3ha.ped clayston.e pebbles 6" 'below top 'Of c.'Ore~ Alte:rne.f~ ing 5" to Sn bade of medium da;rk: gmy claystone\> uoucalcaJ'sous ø concho iàa.l fratC'~urel' a.nd sandstone .iLS above~ Sœll len3efS a.nd pebble! of c~ystona pressnt at top of inter~~l~ Sandsto:ils aß above" with a. lOu se·ctlcn conta.:ining scattered interœ.1a.t1ons of cle.ysj~c.ne at 3141' to 374g~Ð and 111 or intercalated thL"1 (e.pprQximate111/4R) irregular beds of cJ.a.YStOJl6 :a..nd sandi'tt)D.e at 3749 v" InterœJ.a.ted medium dark gray tClayston'3 and medium light g;rs.y 8andstone; the beds a.ri IJg!:c to 2" th1ck9 contaot f! are sbarp and irr>tlar c· Sandstone as a.bove" M1croto8ß11s absent" 271 ~ "~?7n,= ?(~""{1 .: ,.1:/ ~....- j(:¡<.J,,¡. }1)o"<3sro ~ ""~~"" 3 ",,,..-~ '"1,<:.."f },,- ~çr. .I<\,?",'Jooot q ~.J -"'':-'' § 4.->"-"..J' 1.2:i . . .:: ;jl01~ SändB~tvr';.t&»¡" ~V:Bl¿r f:ln·z tg~ 2..'~~ 11:':'. ):'$ ~59 bu~t v¡j~t:h C~:r;bOIì~,~:;~~'1;S ~f?E'..~'¡t1&1.6·B g1'~7'~Jlg t:~vo:d. ~œl;.fr1> cleavage ~e.L~C. á. ðl1g]1t L9..m'b1ç..t~ð. L'1. ~}1iy~~ part 0 I}ip ;~f :~itl:lT~1<~ IO~~'-·~-~ ~~c;~ 1 Ù ,2ti mt~o;}r1~1'1~ 6f the r©ÞÌ:;;: c, (j~y',!tfJl'l-~[~ rüs-di~J1!! ~!s~r1r g~"ð1,.y;_, 'tdi~·~.h :L:a~çarœla'~iotlg m~dit1m giltt~~'tO:~1-$ ·t$.J,J.~f\-~TI._g ¡:'M.r~f--o~,.t;h:trd- i.jf th~ C;¡¡.~ ;E'<~1U"t:h of .d ,'!cect !o¡)Z!., o JICr:i :<Hedl!:"JID tJ.a.rk gt'8-Y c$~¡r~,rtô~~ g;:::",ding do,~"1nß:t'd to medium g:r-E,~' dl~2'~¡¡}n~ ,¡,lit}." :f,~mt Ûight:1.y c;e.rb@roa= Ceoil~ l;~¡!!in¿~ G~d,~';~ tc 7J£~ Sandston~ a® at top of GOrß8 fine¡Y ~minatad with mr~'i¡hw il":reg¡:il~r layers -ôf c:L;;¡.YfJtDne T~$=,iTM;:h ò~d:!'l of !Çl!j~.Yii\\ton'.S' ¡J¡1,r~ 'Cx'sast';t ,ß'ii 3767,j s,"" -'I. 3 7;(J., ,\ - .....,.,;., U ~..)::; "~ ,~s!l,cr,i}fo:i§\Ç5 il-:~ abiJf3n-:~:~ ~d Jt.:g in ~(1:Bt;~m,;3 aboY~" 'b~J,?;'dH,h ~::;,r~1) J);?rit;9 ßnd X¡:!'¡';,\d" S:iind~ton8 $,3 aOO'V!3;) ßndGl,ð}" 3halso ~~lec ~~~~ _~~~)tl; 3f525'~ 3·845 ~~ ~ fl 0°,1,; ~co very .:<"'" '>...1,,-:.: '" "'\¡j;; 3· '-'''<"I .J ~; -b<l.? ~.t=' ' (~':'¡Jt-:: 17 H 6 ~3"~ G1a;¡r ii'!;.1iÜS( m~ð.iwl1 d,r",¡d,:: gra.Yç¡¡';jIlo,r:.alœreotul,. ,¡d,œiC&5D.ß ,9.%¡lidliiy" with thin bed~ aìJ),~ i~¡"regular Jßm:û:¡a.fj C!.j'JL6:! to 211 thi~);¡,f medïu.m light g:n:¡ ;:wn~~¡::a,lç'¿,,;!:"~(,)u;3 dlt!;!~',;;liÐtt)'baJ,ing 10% ¡;of' the rock" '?oor a~ly Cl~YagÐ in,dicat~~h~ð..\! ¿~;e~ fla.tlying., 13:;9t') Se.nd.aìi)l1$,) V&XV f1n~ g;;,~w.6d" dlty a,¡,:¡,d, e.:rgilläcecru9. med.ium H.gh:t gt:"J2::¡" PÆ;ì¡)';'''~O ilJlj.ghtly œlca:r~¡}ust Jnaøs= iveo ,it ò$1 of me~d;um -c1,ä~{ gm;¡ c~,;r~:rÍion'ð .at 3836 tJ is und'3X'L.:tilJ. 'by 8, 10::1 +3eC'UO:il ©f :fL'"1e gr:aJ.ned Bänd= :3tcne ~~,tth,$ œ!H~ ~"}f thi~ i~ :Et ¡;:"art iug mðfked by a !in,gllÐ laJ'l9zo;:Þ;f' to :U.gh't ä.c11d dark ch$!'t 'Jðb'bleg" are""', f¡¡¡1ii (1/4=,1/:2'1) diac$ -;.,,>:!' ..."";¡.'"" '4''<'T'j- "".""'"":"'Y""~"7"'?'"''''··· ",,"·-1""'1"""" ;, ~"" '" f"'I.""? ;.,¡¡J.. ~g{¥~,.i.o'W;"'!' ~""'~.... Q~CÞ...-!'.;::t-:':2:Y' ~ m.JIkA;J- i-î.,Ci"..i:,}... ~'A_& .:... f"",.4. ),_...t.;z¡.g ~""'.~~l,h" ~ "., ~ ,"'T'.;"'''" {n ;:1¡, :;:Jr' ·1",',"""".')"",,t ,-,',!<1!/1fÌb, ,; -~,9-_t..:',.~~s l!,,,,..;~...,4w-O ¿~ -..;.~ obð.~ i!!I~..,¡,. V'i:...J:..... ~;J ..JO H4,' Dsnth B:ff,scrt.iv$ P~¡'~1jit~ .i\b' .Ferme~bnity , ~"'~';£":1 ,.:.~-~~ ... 9i ~n~ . ~.~ . . -- I;'''':~m~ ò' î3 -., -,0.""...) _¢ -.$#"" :;l,j;l":' ..' .., 4- ,IT;rpi,r;¿1.1 V!3ro0'rd.linoid-e~ };."'''; 18 lI~IDmcn;; J.~~? _1 \t;\~'~!~]~n~lm~ i ~ "p rè i:~ñ t '~ 130;0'>' "J''$,%!Y';:::¡,?,1·~;ra,,') U,:íj 1)ølo"'Þ!1 in up!' {j);;- :3 ~ iJ San éÜ~ '~J n!!.!::~ g,,,,'iìO Vii!! 'I ~lightlye~lca~~ou2 Depth sffeDti?Ð Garboi1i.9. t ~ Contsnt ~1;: ''3'~ "ie';; ~t .. J\l1}~'~~¿~:' }; . ~- 6~o'; f £¿~~b t~~"~ ',~<!: '3§fu:¡q Irr-1ì:H1Z"1¡Hk:'.bl~ ~.. D''5t::,'1 ", - t¡ _....0 '\".} ...)';"" S~'U1jl>3ton3 ",,;S ,'i!.'¡).;':fWÐ} 'Very !1i:hy" '1;1'",:\:;111 th !ðb1:tl1da:a:t lnte:r.calðtt©:Œi3 ðp.d ~!ca.ttar9d thin b9d.ítJ f;r il1;¡¡d!U.'U t\a.:r!<:: grn,y 1,;;l?,;;']1t~n9 l'ihich t~'j;,;a,l 1/:3 oftha ¡,©,ŒÞ Cla:r=>~a.nfl ûont~':?."ct$j ð:r:.V 8ñar,p ~n"i ~~g}¡~ 'r'ð~-©11ible ;?ö 'c J. 6iþ ,3gg2=J85t! ' b5 1, Q<:~ ~~3a In ,c, .,»,Q¿.- 0.'.1"..... ,-,.. GO 3910~'J91g :: ~ _. .~'--: 15 li"c ~ 1 (, 0' . ", "f)';;! 0" 1'O"~ 3 . (~r :-a.~ t~ ;g!'~J J;Jl:8 3..J} ~ änd c l:$2L:~' f -:~~~&n·811t,~ ~ G lB;~:{,l~-Õ:71 j~'~,~ ¡, I)J~X; i 14$ ~£ib ~ '?m 't q ,-> Œi1; ~0 "¡öTi/ r-a.¿~@ t ;~. --;:'¢:;3 $11 '1; r~j{lcl 1:__rt>2.T.;:;~":\a_:i;,1~):21B ~-'5 ~ be- v-;_~ g{)qfi r!~ 62;; tV;;;Il~· t¡, ~v'}!t;;:7f ¡'rith cd. '¡;eI7 l:~~l,e ,~<~~ ~~c);¡~~ c~~c~c~'<; ~ìç,~:~:e 'Jð:ll.-ty an<l mi~.;·~f~j~U;e )£573'" ¡'~!I:..~uÊ;'~::bi,l1 ~ Imp~ rr1'\~ble ,:~ i! t ¡>'2. 'g þTeiBti'J.I1'c; E' })ep'th ~.::Î'7"'~ \;,<;60' /~ 3;f,'"':Vt:, . c.'« " i':)F\ ",,'" ,./ 3. b~ ~Jl'~ ~; _:f<:~:;) ~~ :t 1., :,,~ Sänd'_ðtðXlè &, ?:, -.;~ 1)0'78~) ì,;ll thte'n:â'h ¿jd,;~ ð1!; 33g~~¡. a,t 3;~;j¡ ¡'Ð.Q.,:i ;:~:~ 3gb~ r; ~ ,Ì:n.~:'9;c'b,;dd.'3d 'Si3,J1G.J$'G,;j:lle and ð,a,:r!.4'.: g;~"5.Y ~h.a l·e í) ,,;C\...-p7 .9. 0 3{3üi i;;)r1..'fJ'~ 3883 ~ and '3S{~:; i,):!1i\ bê'~1(Îaæ and. 3S'S3 c," titt1..;), :;8'92 ¡¡ ~.dJ;:~., ),-, Ûn;\hf'oo't, ~i~-ct ©Ì th¡; ~;ja;¡¡djJtona e.t 3ggì~¡ &.nð. 3f:'~9)~· '! ar,~ faint~;- t:¡;; fh'$1y L~,miD.s.ted." ~11th œ~l;.Qn~./~acu~ önd Ii11~~~,9C'1.,.1~ 1)21:rti~.g~~. ;rha l.'t.ppSl\) :Ù:rt~J'''!í'£\.l j~ht~fJ~ fJl1gh'tí:z-o ¡;m=bedfli:ag;; 'Gh{') l©\oJer ons, which :L§ '¥';,J,~";;>' ~'!J'¡;¡ni:;, lamif.l,&:t{;H'1.p Ì13,!@! is, of ].0,., ,. r:~::a Dl::':~t iV~"~~))¡;'1J ~ 1t{( ~,ir _F 0JCJ:1t¿i~ 11 Hy lJ<.'S'·~':;' 7",:';:fy ~iD';>3,nï1~pl$ ,gI...... --> - 3S91~ 2 ~ '5 .> '; ~;11cl~©:E\d'3~k~ ;a¡~'9 v-wry ~1,::ø ];'h8 t~par f'! røacb.iEg t}þ.,~ ~jftht~ o~}r~ "J1(a¡~$ d1:fr·tuI~b~9d òefo-r·~ J.ß bo rri'-tC:::,1'7 ~ ths I;oç:k cv¡:;,g i;! ~ Ð ô f?a;ry '¥tSr,¥ ~ 1.1t;,v f1.:nÖ. argil~'£,;O'8(j1J.~ m-e~1111t1l m~d:hw ~!."$,;'; ~j;a:nd¡' l;¡'ð:'~&" ,¡l'¡;h l&mi.D;a~ 6 ~~ th:i,~k) f~}:F n{:)n--~ t~¿ ~'è~r;f ,~;rlt ¡to tAlir1g :flne 1 igh't; g'X~J'4~~r '-;;C an'l "Ûliu e1 ight 1~7 a/bo14-~~ Y. Silt$iö);1~(, [;!t)d,i-¡';:I~ grŒ"yito m;!Jd.h·~ g'J'ay,) very ,~rgillB.:ß~u~y, nonCé1~!"œ.;ra{rPJj witl~ :k1',ca,~¡;~te:~ed Q:,~.rbon-·~ a.coo;;~'3 miCcB.'o'{Jl,jU~ pa.rtd.l"!.g$ ~nd t.M.:a. ¡ l¡~) bed.~ \} f ¡r¡1;'HU.1J1t¡ d¡.1J'k gray rer~, Gls.y'S'G©ü9" ffi¡>¡diœ1 .,ls,:tk gr:,;;¡,:y;¡ wary~:U.'~Yi:1:¡:¡d mt~~ CeO~l£g f~) ~1(,:n"""- f',kl,ltr~rao'\l~ 11 tq1tlt b'~d~ 0 f med~.'U<m grs.y :ߧ.lt~~nf:¡ t~t¿,ling ;;;f th!.1 reclt" Hi'{;J·"f,:;:¡¡;;i;2.,æI ,1"".1..1P13£. 29~ 39J 3 9 -2 J, 9' T a a"la' a, t4 f, 1 -it ta to ia, Den t very 67 3 91 72,' 3 93 7 0 Olmvs'ona, nedirm. gra7 to madi= ci �I Ax g, v r zilty, non—,:�al mrsous, -j i�jVa -m-r . a atrz�-�,Z�a and par-U�haq of ea-utv and, argillacsciuo, 3T,' -P# " Total Depth, .2 PAY 1952 !,~.!--:..~ '''II'--~~ . . ..Old" .. ..a,,'Y \';e11s (1944-:'3) well Name ! I Avak -, 100-Oé}"'+ south Barrow-l I()O -083 South Barrow-2 /()o-oB4 South . Barrow-3 Jao ~o~ I South Barrow-4 /0 0r-0c9' Fish Creek-l I DO -)cì> GJiandstand-l I 00 -~3 . 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South Barrow-10 ItJD-033 South Barrow-ll I($> -63.4.( I t ! South Barrow-12 lóD-ò~ ~ · · .. .._.. ....-.........--...--......-...... .-.'''''--.'. ~ .'-'.~ . J.(6
