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208-019
Image Project Well History File Cover Page XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. (~ ~ - ~~ ~ Well History File Identifier Organizing (done) RES AN Col r Items: reyscale Items: ^ Poor Quality Originals: ^ Other: NOTES: Two-sided IIIII~IIIIIIIIIIII DIGITAL DATA ^ Diskettes, No. ^ Other, No/Type: o ae,~..~~~a uuuiiuiinuii OVERSIZED (Scannable) ^ M ps: Other Items Scannable by a Large Sca~tn~er S S RV~ C,~O ~ Q OVERSIZED (Non-Scannable) ^ Logs of various kinds: ^ Other:: BY: Maria Date: S /s/ IIIII~IIIIIIII VIII Project Proofing BY: Maria Date: 5 I lsl Scanning Preparation ~ x 30 = ~~~ + ~ =TOTAL PAGES~~ 1 (Count does nit include ever sheet) BY: ~ Maria Date: ~/II IIO /s/ ~1 Production Scanning Stage 1 Page Count from Scanned File: ~~~:~I~(Count does include cover sh et) Page Count Matches Number in Scanning Preparation: YES NO BY: ~Ma~ria Date: ~ ` ~ /© /s/ ~. C,~:--. Stage 1 If NO in stage 1, page(s) discrepancies were found: YES NO BY: Maria Date: /s/ Scanning is complete at this point unless rescanning is required. III II II II III II I I III Rescanned III IIIIIIII II VIII BY: Maria Date: /s/ Comments about this file: Quality Checked III IIiIII III II'I III 10/6/2005 Well History File Cover Page.doc 02.? d9-~~rw 1 ~.-c~ t'~ DATA SUBMITTAL COMPLIANCE REPORT 4114/2010 Permit to Drill 2080190 Well Name/No. MASTODON 6-3-9 Operator UNION OIL CO OF CALIFORNIA API No. 50-287-20023-00-00 MD 4845 TVD 4845 Completion Date 3/27/2008 Completion Status P&A Current Status P&A UIC N REQUIRED INFORMATION Mud Log Yes Samples No Directional Survey No DATA INFORMATION Types Electric or Other Logs Run: LWD (GR-Res, Den, Neu, Son) Wireline (Caliper-GR-Res-Den-Neu-So (data taken from Logs Portion of Master Well Data Maint Well Log Information: Log/ Electr Data Digital Dataset Log Log Run Interval OH ! Type MedlFrmt Number Name Scale Media No Start Stop CH Received Comments ED C Pdf 16176 See Notes Open 5/1/2008 PDF images of Driller Mech page, Sigma Data, Log Data, at 1.600 ED C 16177 See Notes Open 5/1/2008 Core Ananlysis, Omni Report E C Las 16178 Sonic 433 4739 Open 5/1/2008 Sonic and Por og Gamma Ray 5 Col 2160 4501 Open 5/1/2008 Res Charaterization, Sample view, Rast Response Quartz guage, GR, Siesmic, MREX, RCOT 20-Mar-2008 ,Log See Notes 5 Col 200 4748 Open 5/1/2008 Borehole Prof, MREX, RCOR, Seismic 13-<ar- 2008 ~~ fi'' Log Magnetic Resonance 5 Col 200 4787 Open 5/1/2008 Magnetic Resonance, xmac, rcor, rci, seismic 14- Mar-2008 Log Caliper log 2 Col 200 4787 Open 5/1/2008 Multipole Array Acoustilog 6 arm Caliper, mrex, rcor, rci seismic 13-Mar-2008 og See Notes 5 Col 200 4787 Open 5/1/2008 rotary sidewall coring tool, xmac, xrex, rci seismic 15- Mar-2008 og See Notes 5 Col 1900 4750 Open 5/1/2008 Azimuthal Anisotropy Analysis • DATA SUBMITTAL COMPLIANCE REPORT 4/14/2010 Permit to Drill 2080190 Well Name/No. MASTODON 6-3-9 Operator UNION OIL CO OF CALIFORNIA API No. 50-287-20023-00-00 MD 4845 TVD 4845 Completion Date 3/27/2008 Completion Status P&A Current Status P&A UIC N Log Caliper log 2 Col 1900 4750 Open 5/1/2008 Multi Ray Acoustic Log "bg Magnetic Resonance 5 Col 1925 4725 Open 5/1/2008 Magnetic Resonance log Log Magnetic Resonance 5 Col 1925 4725 Open 5/1/2008 Magnetic Resonance log ~ with gradiance og Sonic 5 Col 200 1800 Open 5/1/2008 Best DT, Sonic Vision Bit Run 1 og Sonic 5 Col 200 1800 Open 5/1/2008 Best DT, Sonic Vision Bit Run 2 Log See Notes 2 Col 250 4845 Open 5/1/2008 Drilling Proc and Depth Log, DRL 12-Mar-2008 Field Drilling Mechanics Depth Log ~og See Notes Col 1 0 0 Open 5/1/2008 MD MWD Run 1 Drilling Proc and Depth Log, TRP 12-Mar-2008 Field Log See Notes Col 2 0 0 Open 5/1/2008 MD APWD Run 2 Drilling Proc and Depth Log, TRP 12-Mar-2008 Field tkog Induction/Resistivity 5 Col 250 4807 Open 5/1/2008 MD Vision Service 12-Mar- 2008 ~og Induction/Resistivity 2 Col 250 4807 Open 5/1/2008 MD Vision Service 12-Mar- 2008 Log Induction/Resistivity 5 Col 250 4807 Open 5/1/2008 MD Vision Resisitivity 12- Mar-2008 og Density 2 Col 250 4807 Open 5!1/2008 MD Vision Density Quadrant 12-Mar-2008 Log Induction/Resistivity 2 Col 250 4807 Open 5/1/2008 MD VisionResisitivity 12- Mar-2008 ED C 16179 Mud Log 0 0 Open 5/1/2008 MD and TVD logs in PDF, PDS and EMF graphics, Formation evaluation PDS logs. Rpt Directional Survey 0 4845 Open • DATA SUBMITTAL COMPLIANCE REPORT 4114/2010 Permit to Drill 2080190 Well Name/No. MASTODON 6-3-9 Operator UNION OIL CO OF CALIFORNIA API No. 50-287-20023-00-00 MD 4845 TVD 4845 Completion Date 3/27/2008 Completion Status P&A Current Status P&A UIC N Rpt See Notes 0 0 Open 6/16/2008 Rotarty Sidewall Core Photo's D C 16651 Mud Log 0 0 Open 7/28/2008 Mudlogs in PDS format, Final Report in Word Format pt Report: Final Well R 0 0 Open 7/28/2008 Final Well Report, Table of Contents, Equip and Crew, Well Details, Geo Data, Drill Data, Daily Reports og Mud Log 2 Col 85 4845 Open 7/28/2008 MD Drilling Dynamics og Mud Log 2 CoI 85 4845 Open 7/28/2008 MD OFTII Combo og Mud Log 2 Col 85 4845 Open 7/28/2008 MD Gas Ratio og Mud Log 2 Col 85 4845 Open 7/28/2008 MD Formation ED C Exc 17019 See Notes 2159 4475 Open 8/11/2008 Weatherford Rotary Core 1 data /Fluid result pt See Notes 0 0 Open 3/27/2009 Seismic Zero Offset report with 6 seismic maps D C 17762 See Notes 0 0 Open 3/27/2009 Seismic Zero Offset report with 6 seismic maps Well Cores/Samples Information: Sample Interval Set Name Start Stop Sent Received Number Comments Cores and/or Samples are required to be submitted. This record automatically created from Permit to Drill Module on: 2/12/2008. ADDITIONAL INFORMATION C~ Well Cored? l~/ N S W <-- o.tiw~ Daily History Received? W/ N ~ w t Formation To (~/ N Chips Received. Y /~pD Sk9 c. o y ps Analysis (~l / N Received? • I DATA SUBMITTAL COMPLIANCE REPORT 4/14/2010 Permit to Drill 2080190 Well Name/No. MASTODON 6-3-9 Operator UNION OIL CO OF CALIFORNIA MD 4845 ND 4845 Completion Date 3/27/2008 Completion Status P&A Current Status P&A Comments: Compliance Reviewed By: Date: API No. 50-287-20023-00-00 UIC N MEMORANDUM State of Alaska Alaska Oil and Gas Conservation Commission TO: Jim Regg, ~~~ ic~~i ~~~ ~ DATE: September 21, 2009 P.I. Supervisor FROM: Chuck Scheve, SUBJECT: Location Clearance Petroleum Inspector Union Oil Co of California Mastodon 6-3-9 PTD 2080190 Monday, September 21, 2009; I performed a Location Clearance Inspection of Union Oil Company of California (Union)'s exploratory well Mastodon 6-3-9. , This exploratory location was clean with no evidence of past drilling activity other - than the cellar area, which was mounded nicely to prevent ponding. SUMMARY: I made a Location Inspection of the Union abandoned exploratory well Mastodon 6-3-9 and recommend this final location clearance be approved. .~ . R_ i ~ _ - '__ ~~~ ~a~~~ ~~~ Prom: Regg, James B (DOA) Sent: Monday, August 10, 2009 11:27 AM To: 'Henderson, Jennifer' Cc: Brandenburg, Tim G; Hammons, Darrell; Sullivan, Faye 1/~l; Quick, Mike [ASRCJ; Pecci, Chris i Subject: RE: Well location clearance from season 1 and 2 Attachments: 2008-0806_Locations_Mastodon_Smilodon_PantheraJc. pdf Mastodon Attached is the inspection report covering the August 2008 location inspection at Mastodon 6-3-9 (also Smilodon 9-4-9; Panthera 28-6-9). While there was evidence of some mounding over the well/well cellar, the amount of water just at the well location justified additional inspection during 2009, thus the reason for not closing out the location inspection requirements. This year's inspection will determine if additional work is needed at Mastodon. Smilodon, Panthera No further work is necessary for Smilodon 9-4-9 and Panthera 28-6-9 based on information from inspections completed by AOGCC. I understand from your discussions with AOGCC Inspector Jeff Jones that Union plans to visit the Panthera location again since there was a conductor removed last winter from the undrilled Panthera 21- 6-9. The Commission will attempt to accompany Union on the site visits subject to inspector availability. Photo documentation would be acceptable in AOGCC's absence. Official correspondence will be sent to Union for Smilodon 9-4-9 and Panthera 28-6-9 as requested. Call if you have questions or concerns. Jim Regg AOGCC 333 W.7th Avenue, Suite 100 Anchorage, AK 99501 907-793-1236 From: Henderson, Jennifer [mailto:JenniferHenderson@chevron.com] Sent: Friday, August 07, 2009 2:04 PM To: Regg, James B (DOA) Cc: Brandenburg, Tim C; Hammons, Darrell; Sullivan, Faye W; Quick, Mike [ASRC]; Pecci, Chris L Subject: Well location clearance from season 1 and 2 Jim, Chevron met with Jeff today to inspected the White Hills season 2 wells. We were unable to complete the clearance inspection due to weather. After further discussion with Jeff today he said Chevron will need to do more work on the Mastodon well. Per the letter attached from John Crisp dated August 11, 2008, Chevron was under the impression, Mastodon, Panthera and Smilidon were going to be closed out and no further work was required. Chevron never received any further correspondence that more work was required. Chevron would like to request a clearance location close out letter from you for at least Panthera and Smilidon. 8/10/2009 ao~ ot9 ?'h~olrDn'AIOC+Id ill{~ fJ'I'iiCSal r'~f'r~~'p(Jfl'~23i'v'~ i`~c=',:e5~.?t'?~ a~,1di?:1~Jsiai'~AI"3i'l, ~'i^ ~I~~Sva3~a~i~. Chevron is working a plan 'forwa•rd to ~'iil in the well ai: iViusl<o;:en and would lii{e direction from ~~GCC ir` we need to add more dirt to Mastodon. Chevron will have -the pads and well location from season 2 inspected once we complete the required wor!{. Thank you Chevron North America Mid-Continent/Alaska Exploration and Production Company Environmental Specialist 907.263.7902 907.382.2908 ='`x ;~' C.~ .. ~:~ ~ 8/10/2009 • MEMORANDUM TO: Jim Regg 1`2~<~ n~,o` P. I. Supervisor C FROM: John Crisp, Petroleum Inspector State of Alaska Alaska Oil and Gas Conservation Commission DATE: August 06, 2008 SUBJECT: Location Clearance Union Oil Co. of California Exploration Sites White Hills Project August 6, 2008: I traveled to Union Oil Company of California's Mastodon 6-3-9, Panthera 28-6-9 &Smilodon 9-4-9 Exploration drill sites for AOGCC Location Clearance Inspections. Smilodon 9-4-9 PTD 207-152: Mounding on the actual casing string cutoffs was good & there was no ponding in the well cellar. DNR inspected the drill sites before AOGCC Inspection. Mastodon 6-3-9 PTD 208-019: Mounding on the casing strings cellar was good. The area around the cellar had standing water that was no more than 8" deep. This will probably have no adverse effect on the actual mounding @ the cellar. AOGCC will request site inspection next year. Panthera 28-6-9 PTD 208-033: Site looked good & mounding was also good. Standing water outside of cellar looked to be natural due to low spots in tundra & rainwater. DNR inspected all locations prior to AOGCC inspections. Summary: I inspected Union Oil Co. of California's (Chevron) White Hills project Drill sites & reviewed photo's with Supervisor Jim Regg. Attachments: photos (6) August 2008 Location Inspections -Mastodon, Smilodon, Panthera Location Clearance Inspections August 6, 2008 August 2008 Location Inspections -Mastodon, Smilodon, Panthera • Mastodon 6-3-9 (PTD 208-019 ~, ~: ~ ~. ~~'~^ ~,~ ~ tax.: '°'c~.: ~"w.~,uv"'~' err ` ~ ,~ ° ~ '` ~ '~ -.` ~ ,.° r ~~ x~ ~~ ,~:~ ~ ~~_ ~ ~~..~ August 2008 Location Inspections -Mastodon, Smilodon, Panthers 3 August 2008 Location Inspections -Mastodon, Smilodon, Panthera CHE~/RON REQUEST DATE 03/18/2009 Cheer®n U.S.A. S.O. Sox 36366 Houston, TX 77236 11111 S. Wilcrest Houston, TX 77099 s H AOGCC ~ Christina Mahnken P 333 W 7th Ave Ste 100 T Anchorage, Alaska 99501 o United State America Shipped Via: Fed Ex N®. 2009®18103 ORIGINAL TRANSMITTAL OF CONFIDENTIAL DATA From: David Guthman Sent by: Norma Blake Mastodon 6.3.9 API: 50-287-20023-00 QUANTITY DESCRIPTION AREA Survey Product REMARKS 1 VSfusion ZVSP Survey Report Mastodon 6-3-9 VSfusion -Borehole Seismic Report - ZVSP Survey Report North Slope -White Hills VSfusion - Borehole Seismic Report DATE SHIPPED VIA CHEVRON TRANS. NO TRACK # 0311812009 FedEx CH-20090318-031909 8$5629570005720 I~AXlWG,O ~8'F)°361_-3592 PLEASE ACKNOWLEDGE RECEIPT OF MATERIAL BY SIGNING AND RETURNING COPY Q ~: , 1 _. „ ~: _ Date ~1 J_ zip Ri~nna i _ ~ CHEVRON REQUEST DATE 08/08/2008 s H 1 P" T 0 Chevron U.S.A. P.O. Box 36366 Houston, TX 77236 11111 S. Wilcrest Houston, TX 77099 AOGCC Christine Mahnken 333 W 7th Ave Ste 100 Anchorage, Alaska 99501 United State America Shipped Via: DHL • No. 2008-08108 ORIGINAL TRANSMITTAL OF CONFIDENTIAL DATA From: David Guthman Sent by: Norma Blake Mastodon 6.3-9 API: 50-287.20023.00 QUANTITY DESCRIPTION AREA Survey Product REMARKS 1 CD Mastodon 6-3-9 Fluid Result Summary, Logging Procedures, Rota Core Data Weatherford Lad HH-39032 White Hills ~ Lab Analysis DATE SHIPPED VIA CHEVRON TRANS. NO AIR WAYBILL # 08/08/2008 DHL CH•20080808-0000 28519576750 PLEASE ACKNOWLEDGE RECEIPT OF MATERIAL BY SIGNING AND RETURNING COPY OR FAXING TO (281) 561-3592 v: Date ~1~~~9 RiQi~nnQ ~ _ ~ a, ~ ~ - dl°~ CHEVRON Chevron U.S.P. REQUEST DATE P.O. Box 3636ti 07/24/2008 Houston, TX 77236 11111 S. Wilcrest Houston, TX 77099 s H AOGCC ~ 333 W 7th Ave Ste 100 P Anchorage, Alaska 99501 t United State America 0 Shipped Via: DHL N0.2008-07/24 ORIGINAL TRANSMITTAL OF CONFIDENTIAL DATA From: David Guthman Sent by: Norma Blake Mastodon 6-3.9 API: 50-287.20023.00 QUANTITY DESCRIPTION AREA Survey Product REMARKS 1 EPOCH Final Well Report Mudlogging Data Mastodon 6-3-9 EPOCH Final Well Report Mudlogging Data White Hills EPOCH Final Well Report Mudlogging Data 1 Paper Print Mastodon 6-3-9 Mud Log Hard copy White Hills Paper Copy DATE SHIPPED VIA CHEVRON TRANS. NO AIR WAYBILL # 7/24/2008 DHL CH-2008724-0000 228305386653 PLEASE ACKNOWLEDGE RECEIPT OF MATERIAL BY SIGNING AND RETURNING COPY OR FA~IN~-TO (281)5.61-3592 /' ~~ I ~ ~ Date ~ /(005 ! ~i~ai~nnQ i _ CHEVRON REQUEST DATE 06/13/2008 Chevron U.S.A. I~ P.O. Box 36366 Houston, TX 77236 11111 S. Wilcrest Houston, TX 77099 s H AOGCC ~ 333 W 7th Ave Ste 100 P Anchorage, Alaska 99501 T United State America 0 Shipped Via: DHL • No. 2008.06113 ORIGINAL TRANSMITTAL OF CONFIDENTIAL DATA From: David Guthman Sent by: Norma Blake Mastodon 6.3.9 API: 50.287.20023-00 QUANTITY DESCRIPTION AREA Survey Product REMARKS 1 Box Lab Report Mastodon 6-3-9 Rotary Sidewall Core Photography Omni File File No. HH-39032 White Hills Core Photography DATE SHIPPED VIA CHEVRON TRANS. NO AIR WAYBILL # 6/13/2008 DHL CH-2008613-0000 27750894651 PL SE AC NO J EDGE RECEIPT OF MATERIAL BY SIGNING AND RETURNING Ct~P~ ©RfAXING TOr(281) 561-3592 ~_ Date ~O~s -O l `~ ~n zi~nnQ ~ _ ~ CHEVRON REQUEST DATE 04/29f2008 Chevron U.S.A. P.O. Box 36366 Houston, TX 77236 11111 S. Wilcrest Houston, TX 77099 s H AOGCC i 333 W 7t" Ave Ste 100 P Anchorage, Alaska 99501 T United State America 0 Shipped Via: DHL No. 2008.04/29 ORIGINAL TRANSMITTAL OF CONFIDENTIAL DATA From: David Guthman Sent by: Norma Blake Mastodon 6.3-9 API: 50.223.20023.00 QUANTITY DESCRIPTION AREA Survey Product REMARKS 3 (CD's) Mastodon 6-3-9 Well Log Data - White Hills Well Data CD CD1. PDS and LAS Files of Processed SonicVision Bit Run 1 and 2 Start: 433ft - 4739ft. CD2. Drlg Mech Digital data &PDS Logs, LWD From. Eval dig data and PDS Log Directional Srvy Data CD3. DLIS data file, PDF Log Prints EcoView Software 10 Log Prints - Mastondon 6-3.9 Well Data Log Schlumberger 1). BestDT Final Resault SonicVision Prints Bit Run.1 2). BestDT Final Resault SonicVision Bit Run 2 3). DRL Format Drlg Process and `~ Mech (Depth) Log, Recorded mode Fld Print, Surface and Downhole Data 4). TRP Format Drlg Process and P'1,^-,~ (} 1 2003 Mech (Time) Log, Recorded Mode Field Print, Surface and Downhole as~ka QiI ~ y;~ ~~ rs. ~,,sp.~~s~[3~± Data (TD 1890ft) A~Ch ~~e 5). TRP Format Drlg Process and Mech (Time) Log, Recorded Mode Field, Print Surface and Downhole r~ '~ ~~ Data (TD 4845ft) ~ 6). Vision Service MD Log Recorded Mode Field Print, Scale: 1:240 ~t ~ (~~ ~ ~ ~, 7). Vision Service MD Log Recorded Mode Field Print, Scale: 1:600 ~ / (o ~ ~ 8). Vision Resistivity MD Log Recorded Mode Field Print, SI ~~ ~~.~ Scale: 1:240 9). Vision Resistivity MD Log Recorded Mode Field Print, Scale: 1:600 ai~gi~nnR ~ _ ~ 10). Vision Density Q nt MD Log Recorded Mode Field t, Scale:1:240 10 Log Prints - 1). RCI - (SHORT) -Res Characterization Baker Hughes Inst Sampleview Log Fast Response Quartz Gauge GR 2). Rotary Sidewall Coring Tool, Correlation Pass 3). XMA -6ARM CLLog-Multipole Array Acoustilog Unprocessed Acoustic -Main Log 2" / 100ft Scale 4}. XMAC/ACOUSTILog/PROCESSED - MultipoleArray Acousticlog -Compressional and Shear Wave Slowness 5). MREX FORMATION (NMR 250) 6). MREX FORMATION EVAL 7). PROCESSED ANISO-Azimuthal Anisotropy Analysis 8). Magnetic Resonance Explorer Log Unprocessed Mrex Main Log 5" / 100 ft Scale 9). BHP -Borehole Profile 10). RCI - (LONG) -Reservoir Characterization Instrument Sampleview Log Fast Res onse Quartz Gau a GR 1 (CD) - Omini Mastodon 6-3.9 -Rotary Core Analysis White Hills Core Analysis Re ort CD 1 Survey Report, Drilling and Measurements Fld White Hills Documentation - Su ort Schlumber er DATE SHIPPED VIA CHEVRON TRANS. NO AIR WAYBILL # 4/29/2008 DHL CH-2008429-0000 27066679253. PLEASE ACKNOWLEDGE RECEIPT OF MATERIAL BY SIGNING AND RETURNING COPY OR 1~, ~5r'~ 9i~1 r, ~, I `-- Date ~ i~;`. ~ ~ 2003 ,~iaska Oil ~ gas Cons. ~,~,n,~taissior A~choraae ai~ni~nnR ~ _ ~ Chevron Timothy C Brandenburg Union Oil Company of California Drilling Manager P.O. Box 196427 Anchorage, AK 99519-6247 Fax 907 263 7884 ~~~~' Y ~® Apri125, 2008 Commissioner Alaska Oil & Gas Conservation Commission 333 W. 7`~ Avenue Anchorage, Alaska 99501 Re: Well Completion Report and Log (Form 10-407) Exploration, Wildcat, Mastodon 6-3-9 (PTD 208-019) APR 2 8 2008 Alaska Oil & Gas Cans. Commission Anchorage Dear Commissioner: Enclosed for your review is the Well Completion Report (Form 10-407) for the Mastodon 6-3-9 Exploration Well. The attachments include a summary of the daily drilling operations, directional survey, well as-built, wellbore diagram, and photos of the abandonment. The well has been plugged and abandoned as of March 27, 2008. Approval for the plug and abandonment work was given under sundry number 308-080 (Form 10-403). We request that this data be held confidential as required under AS 31.05.035(c) and 20 AAC 25.537(d). If additional information is required, please contact either myself or Mr. Walter Quay at 263-7812. Sincerely, <'-~~ Timothy B andenburg Drilling Manager TCB: stp Attachments: Form 10-407 Operations Summary Directional Survey As-Staked Survey Wellbore Diagram Photos (3) Cc: Well File Union Oil Company of California / A Chevron Company http://www.chevron.com 1 a. Well Status: Oil ^ Gas ^ Plugged 0 Abandoned Q Suspended ^ 2oa4czs.~os zoaaczs.~~o GINJ^ WINJ^ WDSPL^ WAG^ Other^ No. ofCompletions:0 1 b. Well Class: A ncfiora~s Development ~+ xploratory^~ Service ^ StratigraphicTest^ 2. Operator Name: Union Oil Company of California 5. Date Comp., Susp., or Aband.: 3/27/2008 12. Permit to Drill Number: 208-019 3. Address: P.O. Box 196247, Anchorage, AK 99519 6. Date Spudded: 3/4/2008 - 13. API Number: 50-287-20023-00-00 4a. Location of Well (Governmental Section): Surface: 155' FSL & 2119 FWL Sec. 6, T3N, R9E, Umiat Meridian 7. Date TD Reached: 3/12/2008 14. Well Name and Number: Mastodon 6-3-9 Top of Productive Horizon: x' FSL & x' FEL Sec. 6, T3N, R9E, Umiat eridian d 8. KB (ft above MSL): 380.5. Ground (ft MSL): 360 15. Field/Pool(s): ^ Total Depth: 3 T`/D ~0 106' FSL & 2826' FEL Sec. 6, T , R9E, Umiat Meridian 9. Plug Back Depth(MD+TVD): Surface Exploration - 4b. Location of Well (State Base Plane Coordinates, NAD 27): Surface: x- 497,580 y- 5,716,722 Zone- 4 10. Total Depth (MD + TVD): 4845'/ 4845 16. Property Designation: ADL 389986 ~ TPI: x- y- Zone- 4 Total Depth: x- 497,554 y- 5,716,672 Zone- 4 11. SSSV Depth (MD + TVD): N/A 17. Land Use Permit: ADNR LAS 26542 18. Directional Survey: Yes ~ No (Submit electronic and printed information per 20 AAC 25.050) 19. Water Depth, if Offshore: N/A (ft MSL) 20. Thickness of Permafrost (TVD): 1310' 21. Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): LWD (GR-Res, Den, Neu, Son) Wireline (Caliper-GR-Res-Den-Neu-Son-NMR) 22. CASING, LINER AND CEMENTING RECORD CASING WT. PER GRADE SETTING DEPTH MD SETTING DEPTH TVD HOLE SIZE CEMENTING RECORD AMOUNT FT TOP BOTTOM TOP BOTTOM PULLED 16 65 H-40 0 101 0 101 24 50 bbl (270 sx) 0 9-5/8 40 L-80 0 1871 0 1871 12-1 /4 179 / 44 bbl (242 / 213 sx) 0 3-1/2 9.2 L-80 1591 4842 1591 4842 8-1 /2 242 bbl (419 sx) 0 23. Open to production or injection? Yes ^ No Q If Yes, list each 24. TUBING RECORD interval open (MD+TVD of Top & Bottom; Perforation Size and Number): SIZE DEPTH SET (MD) PACKER SET (MD) 25. ACID, FRACTURE, CEMENT SQUEEZE, ETC. DEPTH INTERVAL (MD) AMOUNT AND KIND OF MATERIAL. USED 26. PRODUCTION TEST Date First Production: Method of Operation (Flowing, gas lift, etc.): Date of Test: Hours Tested: Production for Test Period Oil-Bbl: Gas-MCF: Water-Bbl: Choke Size: Gas-Oil Ratio: Flow Tubing Press. Casing Press: Calculated 24-Hour Rate ~ Oil-Bbl: Gas-MCF: Water-Bbl: Oil Gravity -API (corr): 27. CORE DATA Conventional Core(s) Acquired? Yes ^ No ^~ Sidewall Cores Acquired? Yes Q No ^ If Yes to either question, list formations and intervals cored (MD+TVD of top and bottom of each), and summarize lithology and presence of oil, gas or water (submit separate sheets with this form, if needed). Submit detailed descriptions, core chips, photographs and laboratory analytical results per 20 AAC 25.071. Sidewall Cores: f.riri€i` . _.. i e ~.~. ~O ~ ~~~ ~~'~ (j 200 _. (~C~ Form 10-407 Revised 2/2007 ~ J ~ ~ ~ l ~ ~t~NTINUED ON REVERSE ~j • STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION ~~c~fv~® APR 2 S 2008 WELL COMPLETION OR RECOMPLETION REP C ~ J 28. GEOLOGIC MARKERS (List all formations and markers encountered): 29. FORMATION TESTS NAME MD TVD Well tested? Yes ~ No If yes, list intervals and formations tested, briefly summarizing test results. Attach separate sheets to this form, if Base Permafrost 1310 1310 needed, and submit detailed test information per 20 AAC 25.071. Prince Creek "A" 1705 1705 Ugnu 2065 2065 Schrader Buff A 2675 2675 Schrader Bluff B 3410 3410 Schrader Bluff C 4265 4265 Formation at total depth: Colville 4845 4845 30. List of Attachments: Operations Summary, Directional Survey, As-Built Survey, Wellbore Diagram, Photos (3) 31. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact: Walter Quay Printed Name: Tim Brandenburo Title: Drilling Manager Signature: ~ Phone: 263-7812 Date: 4/24/2008 INSTRUCTIONS General: This form is designed for submitting a complete and correct well completion report and log on all types of lands and leases in Alaska. Submit a well schematic diagram with each 10-407 well completion report and 10-404 well sundry report when the downhole well design is changed. Item 1a: Classification of Service wells: Gas Injection, Water Injection, Water-Alternating-Gas Injection, Salt Water Disposal, Water Supply for Injection, Observation, or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI (Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level 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 13: The API number reported to AOGCC must be 14 digits (ex: 50-029-20123-00-00). Item 20: Report true vertical thickness of permafrost in Box 20. Provide MD and TVD for the top and base of permafrost in Box 28. Item 22: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 23: If this well is completed for separate production from more than one interval (multiple completion), so state in item 1, and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). Item 26: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-in, or Other (explain). Item 27: Provide a listing of intervals cored and the corresponding formations, and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. Item 29: Provide a listing of intervals tested and the corresponding formation, and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 2/2007 1 ~~` • • Chevron $({~ iviastoavn survey rcepvrt Report Date: March 14, 2008 Survey 1 DLS Computation Method: Minimum Curvature / Lubinski Client: Chevron Vertical Section Azimuth: 207.890° Field: White Hills Chevron Vertical Section Origin: N 0.000 ft, E 0.000 ft Structure 1 Slot: Mastodon /Mastodon Slot 1 TVD Reference Datum: Rotary Table Well: Mastodon TVD Reference Elevation: 380.50 ft relative to MSL Borehole: Mastodon Sea Bed 1 Ground Level Elevation: 360.00 ft relative to MSL UWIIAPI#: 502872002300 Magnetic Declination: 22.445° Survey Name 1 Date: Mastodon I March 6, 2008 Total Field Strength: 57552.292 nT Tort I AHD I DDI 1 ERD ratio: 7.376° / 58.73 ft / 2.637 / 0.012 Magnetic Dip: 80.312° Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: March 06, 2008 Location LatlLong: N 69 3814.050, W 1501 8.355 Magnetic Declination Model: BGGM 2007 Location Grid NIE Ylx: N 5716722.000 ftUS, E 497580.000 ftUS North Reference: True North Grid Convergence Angle: -0.01780104° Total Corr Mag North •> True North: +22.445° Grid Scale Factor: 0.99990001 Local Coordinates Referenced To: Well Head • ' Comments Measured Inclination Azimuth Sub-Sea TVD Typ Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure ft de de ) k ft ft ft ft ft ft de 1100 ft ftUS ftUS n nn n nn n nn n nn n nn ~~~a~o~ nn dca7FRn nn nl Fa 3R 1a nsn \A/ 15n 1 R 35F KI t V.VU MWD 177.49 v.vv 0.19 v.vv 209.08 -oov.vv -203.01 v.vv 177.49 v.vv 0.29 ~.~~ 0.29 .,...~ 0.29 ....... -0.26 ....... -0.14 ....... 0.11 ... .... «..,., 5716721.74 .....,.,_..._ 497579.86 .. -- -- ...--- N 69 38 14.048 .. .-- ~ W 150 1 -~--- 8.359 295.76 0.42 200.70 -84.74 295.76 0.92 0.92 0.92 -0.83 -0.39 0.20 5716721.17 497579.61 N 69 38 14.042 W 150 1 8.366 415.06 0.15 234.88 34.56 415.06 1.49 1.50 1.49 -1.33 -0.67 0.26 5716720.67 497579.33 N 69 38 14.037 W 150 1 8.374 479.76 0.52 217.32 99.26 479.76 1.86 1.88 1.86 -1.62 -0.92 0.59 5716720.39 497579.08 N 69 38 14.034 W 150 1 8.381 600.66 0.56 213.93 220.15 600.65 2.99 3.02 2.99 -2.54 -1.58 0.04 5716719.46 497578.42 N 69 38 14.025 W 150 1 8.400 722.86 0.59 216.58 342.34 722.84 4.20 4.24 4.22 -3.54 -2.29 0.03 5716718.46 497577.71 N 69 38 14.015 W 150 1 8.420 844.76 0.51 213.69 464.24 844.74 5.36 5.41 5.39 -4.50 -2.97 0.07 5716717.50 497577.03 N 69 38 14.006 W 150 1 8.439 969.76 0.61 216.98 589.23 969.73 6.57 6.63 6.61 -5.49 -3.68 0.08 5716716.51 497576.32 N 69 38 13.996 W 150 1 8.459 1099.26 0.63 203.69 718.72 1099.22 7.96 8.03 8.00 -6.69 -4.38 0.11 5716715.31 497575.62 N 69 38 13.984 W 150 1 8.479 1228.86 0.67 184.32 848.32 1228.82 9.37 9.49 9.38 -8.10 -4.72 0.17 5716713.90 497575.28 N 69 38 13.970 W 150 1 1357.46 0.63 188.33 976.91 1357.41 10.72 10.94 10.73 -9.55 -4.88 0.05 5716712.45 497575.12 N 69 38 13.956 W 150 1 1484.56 0.67 198.55 1104.00 1484.50 12.12 12.38 12.13 -10.95 -5.22 0.10 5716711.05 497574.78 N 69 38 13.942 W 150 1 8. 3 1614.36 0.61 197.99 1233.79 1614.29 13.55 13.83 13.57 -12.32. -5.67 0.05 5716709.68 497574.33 N 69 38 13.929 W 150 1 8.516 1744.16 0.61 191.81 1363.58 1744.08 14.89 15.21 14.93 -13.66 -6.03 0.05 5716708.35 497573.97 N 69 38 13.916 W 150 1 8.526 1818.09 0.71 194.41 1437.51 1818.01 15.71 16.06 15.77 -14.49 -6.22 0.14 5716707.52 497573.78 N 69 38 13.908 W 150 1 8.531 1937.19 0.74 192.55 1556.60 1937.10 17.17 17.57 17.25 -15.95 -6.57 0.03 5716706.05 497573.42 N 69 38 13.893 W 150 1 8.541 2066.29 0.78 184.55 1685.69 2066.19 18.78 19.28 18.92 -17.64 -6.82 0.09 5716704.36 497573.17 N 69 38 13.877 W 150 1 8.548 2195.50 0.59 203.82 1814.89 2195.39 20.26 20.81 20.42 -19.13 -7.16 0.23 5716702.88 497572.83 N 69 38 13.862 W 150 1 8.558 2324.32 0.63 187.60 1943.70 2324.20 21.58 22.17 21.78 -20.44 -7.52 0.14 5716701.57 497572.47 N 69 38 13.849 W 150 1 8.568 2452.62 0.52 196.74 2072.00 2452.50 22.81 23.46 23.05 -21.69 -7.78 0.11 5716700.31 497572.21 N 69 38 13.837 W 150 1 8.575 2580.84 0.80 194.28 2200.21 2580.71 24.25 24.94 24.52 -23.12 -8.17 0.22 5716698.89 497571.82 N 69 38 13.823 W 150 1 8.586 2711.15 0.78 197.11 2330.50 2711.00 26.01 26.73 26.31 -24.85 -8.66 0.03 5716697.16 497571.34 N 69 38 13.806 W 150 1 8.600 SurveyEditor Ver SP 2.1 Bld( doc4Ox_1OO) Mastodon Slot 1\Mastodon\Mastodon\Mastodon Generated 4/24/2008 1:49 PM Page 1 of 2 • • • '. Comments Measured Inclination Azimuth Sub-Sea TVD ND Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure ft de de ft ft ft k ft ft ft de 1100 ft ftUS ftUS L2532f .yt5 U.tSL "1255 .L4 L4525 .SL Lt5.Si5. t5L 2967 .68 1.00 194 .77 2587 .01 2967. 51 3094 .98 0.75 189. 53 2714 .29 3094. 79 3223 .68 0.67 193. 14 2842 .98 3223. 48 3352 .48 0.66 216. 02 2971 .77 3352. 27 3482 .18 0.73 200. 95 3101 .46 3481. 96 3610 .48 0.66 200. 35 3229 .75 3610. 25 3738 .58 0.73 211. 97 3357 .84 3738. 34 3867 .67 0.74 200. 86 3486 .92 3867. 42 3996 .67 0.55 214. 27 3615 .92 3996. 42 4124 .77 0.79 216. 34 3744 .01 4124. 51 4253 .37 0.61 220. 48 3872 .60 4253. 10 4382 .77 0.66 230. 15 4001 .99 4382. 49 4446 .37 0.63 229 .24 4065 .59 4446. 09 4512 .29 0.77 235 .74 4131 .50 4512. 00 4640 .99 1.36 245 .68 4260 .18 4640. 68 Last Survey 4770.19 2.25 237.06 4389.31 4769.81 TD (Projected) 4845.00 2.25 237.06 4464.07 4844.57 Leaal Descriation: Surface : 155 FSL 2119 FWL S6 T3N R9E UM BHL : 106 FSL 2826 FEL S6 T3N R9E UM Z/./"I Lt3.5~1 29.65 30.55 31.53 32.49 33.05 34.09 34.52 35.56 36.07 37.13 37.62 38.68 39.16 40.23 40.81 41.88 42.25 43.33 43.74 44.82 45.28 46.39 46.65 47.83 47.31 48.54 48.04 49.35 50.01 51.73 53.44 55.79 56.00 58.73 Northina IYl fftUSl 5716722.00 5716672.52 Z25.V/ -Lb.b`J -`J.UV U.IS D/ll~p`JU.4L 4`J/O/~I.UV IV l~`J 3Z3 l3./t5`J VV l~U l t5.1~U`J 30.09 -28.59 -9.37 0.18 5716693.41 497570.63 N 69 38 13.769 W 150 1 8.620 32.02 -30.49 -9.79 0.21 5716691.52 497570.20 N 69 38 13.750 W 150 1 8.632 33.60 -32.05 -10.10 0.07 5716689.95 497569.89 N 69 38 13.735 W 150 1 8.641 35.06 -33.38 -10.71 0.20 5716688.62 497569.28 N 69 38 13.722 W 150 1 8.658 36.60 -34.76 -11.44 0.15 5716687.25 497568.55 N 69 38 13.708 W 150 1 8.678 38.15 -36.22 -11.99 0.05 5716685.79 497568.00 N 69 38 13.694 W 150 1 8.694 39.68 -37.60 -12.68 0.12 5716684.41 497567.31 N 69 38 13.680 W 150 1 8.713 41.31 -39.08 -13.41 0.11 5716682.93 497566.58 N 69 38 13.666 W 150 1 8.734 42.74 -40.37 -14.06 0.19 5716681.64 497565.93 N 69 38 13.653 W 150 1 8.752 44.18 -41.59 -14.93 0.19 5716680.42 497565.06 N 69 38 13.641 W 150 1 45.68 -42.82 -15.90 0.15 5716679.19 497564.09 N 69 38 13.629 W 150 1 46.97 -43.82 -16.91 0.09 5716678.19 497563.07 N 69 38 13.619 W 150 1 8.833 47.60 -44.29 -17.46 0.05 5716677.72 497562.53 N 69 38 13.615 W 150 1 8.849 48.29 -44.77 -18.10 0.24 5716677.24 497561.89 N 69 38 13.610 W 150 1 8.867 50.14 -45.89 -20.21 0.48 5716676.12 497559.78 N 69 38 13.599 W 150 1 8.926 53.46 -47.90 -23.73 0.72 5716674.11 497556.25 N 69 38 13.579 W 150 1 9.026 56.00 -49.50 -26.20 0.00 5716672.52 497553.79 N 69 38 13.563 W 150 1 9.095 Easting (X) ~ftUS 497580.00 497553.79 SurveyEditor Ver SP 2.1 Bld( doc4Ox_1OO) Mastodon Slot 1\Mastodon\Mastodon\Mastodon Generated 4/24/2008 1:49 PM Page 2 of 2 ~' • Mastodon 6-3-9 Exploration Well • Lower Foothills, White Hills Prospect Operations Summary: 3-23-08 PTD No. 208-019 (All depths RKB unless labeled otherwise) 2/17/2008: The rig support crew worked with RSM, Peak and Tester and GBR welder today and we finished Mastodon cellar, got conductor hole drilled, conductor welded togerther,conductor pipe set in, plumbed and leveled. Covered for tonite with matting board for safety (will grout conductor tomorrow and weld on base plate.) 2/27/2008: ND BOP Prepare Rig For Move. Move Auxiliary Equipment to Mastodon from Smilodon Pad 2/28/2008: Continue Moving Rig from Smildon Pad to Mastodon Pad and Rigging Up. 2/29/2008: Continue RU. RU Mud System, Fuel Tanks, Heating, Piping & Electrical. 3/1/2008: Continue RU. Scope Derrick Up. Install Wind Walls, Prepare to RU Top Drive. 3/2/2008: Continue RU. PU Top Drive Torque Tube. Maintain & Repair Top Drive. NU BOP/Diverter. 3/3/2008: Complete RU w/Function Test of Diverter. ACCEPT RIG. PU DP. Test Mud Liines PU BHA. 3/4/2008: Lay down BHA, Pick up Smart tools, Dri11 12 1 /4" Hole - 3/5/2008: Dri11 705 to 1040. Flowline plugging Clean Flowline. Drill 1040 to 1881'. Circulate and condition for short Trip. Wiper Trip. 3/6/2008: Complete Wiper trip, Wash to bottom, Flow line packed off with clay, clean out flow line, Circulate bottoms up x 3, Drill 9' to TD of 1890', Circulate, TOOH f/Csg, Lay Down LWD tools and BHA • 3/7/2008: Run 45 joints 9 5/8" 40# L-80 casing, Circulate B/U, RIH w/ DP for stab-in cement job, stab-in, circulate, cement casing with 240 sacks (179 bbl) 10.5 ppg Permafrost type L (4.15 yield) lead slurry and 220 sacks (45 bbl) 15.8 ppg Class G (1.16 yield) tail slurry, total of 65 bbls cement returns at surface. Cement in place at 2230 hours. Contacted AOGCC (John Crisp @ 11:50 AM) concerning upcoming BOP test. 3/8/2008: POOH w/DP, Flush BOP stack, Install packoff and pressure test, ND diverter, Clean Mud Tanks, Test BOP's to 250 psi low/ 2500 psi high, test witnessed by John Crisp (AOGCC) 3/9/2008: Complete BOP test at 0330, pressure test 9-5/8" casing to 2000 psi, P/U Drill pipe, cut and slip drill line, P/U 8 1/2" BHA assembly, test MWD/LWD tools 3/10/2008: RIH picking up DP, drill cement and float collar at 1788', Drill out 9 5/8" Shoe at 1872', drill to 1916' (26' of new hole), perform FIT to 15.5 PPG EMW, Drill 8-1/2" hole to 2431' 3/11/2008: Drill to 3042', circulate hole clean, short trip to shoe with tight spots at 2970', 2900, 2563', 2109'. RIH, drill to 3879'. Top drive torqued up and stalled, backing off saver sub and middle connection of stand being drilled. Circulate hole clean, POOH to check for loose connections, found 4 loose connections, Tight spot at 3826' and had to backream through tight spot at 3550'. 3/12/2008: POOH to BHA, check all connections for torque. Replace top drive encoder. RIH & drill to TD 3/13/2008: Drill To 4845' TD. Wiper trip, POOH 1/d BHA, E-line logging 3/14/2008: Continue wireline logging per program. • 3/15/2008: Logging with Baker Atlas, Test BOPE to 250 low, 2500 high, test witness waived by AOGCC rep Chuck Scheve. Final Report Summary page 1 • • 3/16/2008: Com lete BOP test Pi e conve Baker Atrlas RCI to s. p ~ p Y g 3/17/2008: Continue RCI Logging. Hole Conditions Becoming Sticky. TOH with RCI Logging Tool. TIH with Clean Out BHA. 3/18/2008: Wiper trip to TD for drill pipe conveyed RCI and VSP. 3/19/2008: Complete Wiper trip. Fluid sampling with drill pipe conveyed RCI tools. 3/20/2008: Finish fluid sampling with drill pipe conveyed RCI tools. TOOH and lay down RCI tools. PU wireline VSP logging tools. 3/21/2008: Finish VSP logging. RD Wireline equipment. RU casing running tools. Run 3 1/2" liner, PU liner hanger, Run liner on HWDP and DP. 3/22/2008: Finish running 3 1/2" abandonment liner. Circulate hole volume for cementing. Cement liner in place, set mer anger, set finer top packer. Lay down cement head. TOOH laying down drill pipe and BHA. Pressure test liner top to 2000 psi for 30 minutes. Continue laying down drill pipe. 3/23/2008: Finish laying down drill pipe. Set CIBP at 257'. Pull wear bushing. RIH with 3 1/2" TBG to 251'. Rig up cement lines. Pump cement plug from 251' RKB. Lay down 3 1/2" TBG. Flush out BOP stack. Start NDBOP and cleaning mud pits. 3/27/2008: Cut cunductor. Cement 9 5/8 casing to cut off. AOGCC onsite to witness. UNION OIL CO OF CALIFORNIA Mastodon 6-3-9 50-287-20023-00 . PTD # 208-019 3/29/2008: Backfill cellar. Clean location. 4/8/2008: Finsihed closing Mastodon out completely. Placed berm across road to stop any further traffic to Mastodon pad. • Final Report Summary page 2 D 1 ~1 S CALE: 1 " = 200' NOTES: 1. COORDINATES SHOWN ARE NAD 27 ALASKA STATE PLANE ZONE 4. 2. GEOGRAPHIC COORDINATES ARE NAD 27. 3. ALL DISTANCES ARE GROUND. 4. ICE PAD IS ROTATED 70° EAST FROM NORTH. 5. VERTICAL DATUM IS ASSUMED. ~;;rn ~:o i~ ~;~ ~~~ VII.IIVI ~ T IVIHI' 1" = APPROX. 3 MI. MASTODON LOCATED WITHIN PROTRACTED SEC. 6, T 3 N, & R 9 E, UMIAT MERIDIAN. 155' F. S. L, 2119' F.W.L. LAT = 69°38'14.05" N LONG = 150°01'08.35" W Y = 5,716,722' X = 497,580' Ra p,0 DENOTES SPILL TRAJECTORY STAKED CONDUCTOR LOCATION 1111 ~LJ i' ®1 d UNION OIL OF CALIFORNIA CADD FILE N0. DRAWING N0: MASTODON TOPO 25 SEPT. 07 LOUNSBURY & ASSOCIATES, INC. SURVEYORS ENGINEERS PWNNERS MASTODON WELL AS-STAKED DRAWING WITH TOPO AND SPILL TRAJECTORY SHEET: REV: 1 of 1 0 r ,. ~AA ~ C`T(lfl (~~I U ~ Chevron I White Hills Exploration I ~Leaset& Serial p: ADL3 9986 Field: Exploration API#: 50-287-20023-00-00 Surface Location: Weli Classificaton: Exploration Well 155' FSL & 2119' FEL Total Depth: 4,845' Sec 6,T3N,R9E,UM pBTD: Surface X: ASP4 497,580 Tubin N/A RKB-GL ~~ Y: ASP4 5.716,672 Prod Pkrs: 1 9-5/8" Baker 2XP H draulic Sel Pkr 23.00' Well Status: P&A cL Operator: Union Oil of Cal Ownership: Union Oil Company of California 100 ..~ - ~ GL-MSL: 360 Spud Date: 3/4/08 1:30 AM 101' Csg RKB-MSL: 380.5 Other: Spud Mar 2006; Plugged Mar 2008; Abandoned Mar 2008 O'TOC BHP: 15.6 ppg 270 sx _, , ~ ~ I' I BHT: RKB-MSL MsL 380.00' 9.2 paa RKB-Permafrost ee~ 1310.00' _ .... .. aa,m~r,oso .l i Ai I ..~ ..it. ~ ~ ~ .. __ ._ _ ~, .. .. yam, ~2 1' Y.y~~,k ~+Fl _Q y •~.. 1 ... Y'- d~ '4=~~'-• -- > e. _+ Mastodon Cellar x ~A_ ,• `, e 1 •I Mastodon After Backfill ~rt.`~Jii?7~ # • Chevron -Alaska Weekly Operations Report ~ ®~ _ ~ ~~ Well Name Field Name API/UWI Lease/Serial MASTODON 6 3-9 5028720023_00_ _ ADL 389__986__ Primary Job Type - - Primary Wellbore Affected Drilling -Original Original Hole __. Jobs -- --- rn _._....~..~...Job....._..~___..._.._ AFE No. C ;Drilling -original :,Drill UVVDA... i Daily Operations _ 3/2712D08 Uperanons Summary ;Cut conductor. Cement 9 5/8 casing to cut off. AOGCC onsite to witness. 3/2912D08 ! ~ pera:w~-~s .,w ~ ,; ~ dry Backfill cellar. Clean location. u ..~.~_~._ ~~.ile B~r~ 2/z7/~uut3 ~3/14/2uU8 ~VValter Quay ~ r~ Chevron Chevron -Alaska Weekly Operations Report ~~~~ ~~ Weil Name MASTODON 6-3-9 Field Neme APIfUWI 502872002300 Lease/Serial ADL 389986 Orig KB Elev (ftKB) Water Depth (ft) Primary Job Type Drilling -Original Primary Wetlbore Affected Original Hole Jobs Type Job Cat AfE No. Objective Actual Start End Date OC Eng Drilling -Original Drill UWDA... 2/27/2008 Walter Quay Dai Q --- _ _ ~ -- - 3/13/28 - Operations Summary Drill To 4845' TD. Wiper trip, POOH I/d BHA, E-line logging 3/14!2008 _ Operations Summary Continue wireline logging per program. 3l1Sl2008 Operations Summary Logging with Baker Atlas, Test BOPE to 250 low, 2500 high, test witness waived by AOGCC rep Chuck Scheve. 3/16/2008 Operations Summary Complete BOP test, Pipe convey Baker Atrlas RCI logs. 3!17!2008 Operations Summary Continue RCI Logging. Hole Conditions Becoming Sticky. TOH with RCI Logging Tool. TIH with Clean Out BHA. 3!18!2008 Operations Summary Wiper trip to TD for drill pipe conveyed RCI and VSP. 3!19!2008 Operations Summary Complete Wiper trip. Fluid sampling with drill pipe conveyed RCI tools. --- • MEMORANDUM State of Alaska Alaska Oil and Gas Conservation Commission TO: Jim Regg ~~~~j ~~Z~f ~~u DATE: March 22, 2007 P. I. Supervisor FROM: Bob Noble SUBJECT: Abandonment Plug Test Petroleum Inspector Mastodon 6-3-9 Union Oil Co of Calif. PTD 208-019 March 22, 2007: I received a call from Union Oil Rep. Jason Bradford asking me if I was interested in witnessing a pressure test on the bottom plug on Mastodon 6-3-9. I went to witness the pressure test. Summary: Jason was ready to pressure test when I arrived on location. The procedure called for a test pressure of 2000 psi. Pre = 0 psi, Initial = 2150 psi, 15 min = 2103 psi, 30 min = 2094 psi. It was a pleasure working with Jason. Attachments: none 2008-0322_P&A~ lug-test_Mastodon_bn. doc Mastodon P&A Cement Vol ~ djustment based on OH Caliper . Page 1 of 1 Maunder, Thomas E (DOA) From: Maunder, Thomas E (DOA) Sent: Tuesday, March 18, 2008 10:16 AM To: 'Quay, Walter [ASRC]' Cc: Harness, Evan; Quick, Mike [ASRC] Subject: RE: Mastodon (208-019) P&A Cement Volume Adjustment based on OH Caliper Walter, You have new information regarding the hole geometry, so making the adjustment is appropriate. Nothing further is needed. I will place a copy of this message in the file. Call or message with any questions. Tom Maunder, PE AOGCC From: Quay, Walter [ASRC] [mailto:WQuay@chevron.wm] Sent: Tuesday, March 18, 2008 10:12 AM To: Maunder, Thomas E (DOA) Cc: Harness, Evan; Quick, Mike [ASRC] Subject: Mastodon P&A Cement Volume Adjustment based on OH Caliper Tom, As per our conversation, I propose decreasing the volume of cement for the P&A on Mastodon 6-3-9 from the 303 Bbls proposed to 242 Bbts. This is based upon the new information, the open hole caliper, that shows an average hole size of 8.865". Vlfith this hole size of 8.865" and 100' of cement above the liner hanger with DP out the calculated cement volume is the 242 Bbls or 420 Sx of the 3.24 ft3/sx cement. The 303 Bbls would put the cement a calculated > 800' above the liner hanger, raising concerns with tripping out the liner hanger running tool, setting the liner and liner top packer, Walter Quay WQuay@chevron.com Office: 907-263-7812 Cell: 907-230-3961 3/18/2008 Sundry to Abandon Mastodon~8-019 ~ Page 1 of 2 Maunder, Thomas E (DOA) From: Maunder, Thomas E (DOA) Sent: Friday, March 14, 2008 10:45 AM To: 'Quick, Mike [ASRC]' Cc: Flynn, Tim [ASRC]; Fowler, Don P; Purugganan,Abraham; Harness, Evan; Brandenburg, Tim C; Quay, Walter [ASRC]; 'AOGCC North Slope Office' Subject: RE: Sundry to Abandon Mastodon 20$-019 Mike, et al, We have received the sundry and I am reviewing it. With regard to your BOP test, your proposal to delay the test until prior to tripping in is acceptable. Please keep the Inspectors informed. Tom Maunder, PE AOGCC From: Quick, Mike [ASRC] [mailto:MQuick@chevron.com] Sent: Friday, March 14, 2008 9:39 AM To: Maunder, Thomas E (DOA) Cc: Flynn, Tim [ASRC]; Fowler, Don P; Purugganan,Abraham; Harness, Evan; Brandenburg, Tim C; Quay, Walter [ASRC] Subject: Sundry to Abandon Mastodon 208-019 Mr. Maunder - Attached is a completed 10-403 sundry to plug and abandon Mastodon 6-3-9, permit 208-019. Mr. Tim Flynn will deliver a hard copy to your office this morning. «Mastodon 10 403 sundry to abandon.pdf» Also, per our conversation, we are currently wireline logging and will complete logging on the morning of 3117. Our BOP test was completed on 3/9 at 0330, making it due on 3116. We request a waiver to the 7-day BOP test until we complete wireline logging, estimate to be approximately 32 hours after our test is due. The BOPE would be tested prior to running in the hole with any pipe (drill pipe or tubing). This request is in effort to save operational time in effort to get another hole drilled this season. Please call me on the rig at 771-7402 or 771-7452 if you have any questions. Thank you, Mike Quick Drilling Engineer MidContinent/Alaska SBU Chevron North America Exploration and Production 909 West Ninth Avenue Anchorage, Alaska 99501 Direct 907-263-7900 Fax 1-866-480-5398 3/16/2008 ~~w ~ ~ ~ ~ ~ ~~ ~ ~ J SARAH PALIN GOVERNOR ~_...~ ~ L ~T~+T Laili>rr-7r~1aT ~~ ~~is`~~ 333 W. 7thAVENUE, SUITE 100 COl`-7ERQ~ii01s COrirrIIS''-7'~0~ ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Tim Brandenburg Drilling Manager Union Oil Company of California PO Box 196247 Anchorage, Alaska 99519 RE: Exploration, Wildcat, Mastadon 6-3-9 Sundry Number: 308-080 Dear Mr. Brandenburg: Enclosed is the approved Application for Sundry Approval (Form 10-403) relating to the above referenced well. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659- 3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. S' cerely, Daniel T. Seamount, Jr Chair DATED this -~' day of March, 2008 Encl. 1 T o$ U'"'3" ~~ STATE OF ALASKA ~~ ~ t "~ c ` ALASKA OIL AND GAS CONSERVATION COMMISSION RECEf V APPLICATION FOR SUNDRY APPROVALS MAR 1 4 2 20 AAC 25.280 . ype of Request: Abandon Q Suspend (] Operational shutdown ^ Perforate 8 Alter Iasi S• ng ^ Repair well ^ Ptug Perforations [] Stimulate ^ Time Extengi~(~ Change approved program ^ Putl Tubing ^ Perforate New Pool 2. Operator Name: ^ Re-enter Suspended Welt ^ Union Oil Company of California 4. Current Well Class: 5. Perm+t to Drill Number: Development ^ Exporatory 0 208-019 3. Address: Stratigraphic Service P.O. Box 19647, Anchorage, AK 99519 ^ ^ 6. API Number: 7, tf perforating, closest a 50-287-20023-p0 pproach in pool(s) opened by this operation to nearest 8. WeU Name and Number. Property line where ownership or landownership changes: Spacing Exception Required? Yes ^ No Q ~' 9. Property Designation: Mastodon 6-3-9 'FQ. KB Elevation {ft): 11. F~kUPool{s): ADL 389986 `' 360 MSL None t z. ~ ota~ uepth MD {ft): (Total Depth TVD (ft): 4845' nnds~ MD and Length 187219-518" PRESENT WELL CONDITION SUAAMARY t3_ Attachments: Description Summary of Proposal detailed Operations Program Q BOP Sketch ^ 15. Estimated bate for Mar. 17, 2008 commencing Operations: 17. Verbal Approval: Date: commission Representative: I8. I hereby certify that the foregoing is true and correct to the b printed Name Tim Brandenburg signature ~+s, Phone - 4~ ----^ COMMISSION USE ONLY :onditions of approval: Notify Commission sa that a representative may witness Number: ~ ~ ' ~~ plug Integrity ~ BOP Test ^ Mechanical integrity Test ^ Location Clearance -ther: +~ ~ v.S EC~....®~ o ~~o~`~ovJ~~r~s 5 pis J~ ~~~, ~4i~s~ ~" ~~~ t~ ~ p ~zn P~ .~.~~\~ P ~ ~~ ~' ~~~~~~~~~ S~~a~c~~ ~~~~ ubsequent Form Required: ~ ~~ pproved by: Form 10103 Revised 06/2006 16 it my Title 7657 MD TVD Burst Collapse 80 80 1872 1872 5750 3090 Tubing Grade: T~~t,;~., nnn rw~• (ft): Exploratory Q Development ^ Service ^ 16. Weil Status after proposed work: Oil ^ Gas ^ Ptu99ed ^ Abandoned [~ WAG ^ GINJ ^ WINJ ^ WDSPL ^ 'ledge. Contact Michael Quick 263-7900 Drilling Manager Date , , .._ _ ,,, APPROVED BY E COMMI S QN Date: ~ 1 ~-,, Gihmif in nunl:nasn s • Mastodon Proposed Abandonment Procedure 1. M/IJ and run 3-1/2" production liner on 4" drill pipe as follows: • 3-1/Z" float shoe • +3,100' of 3-1/2" liner • 3-1/2" IBT liner type I landing collar • 2 joints 3-1/2" IBT liner. • 9 5/8" x 7" liner hanger Liner Hanger to set 150' above the 9-5/8" shoe. • 9 5/8" x 7" ZXP liner top packer • 4" drill pipe to surface ~ n r--~ "~ ~-Fc'7~2 e'kS t~~ ~ (~~ 2. Cement with 303 Bbls, 526 Sx of 11.2 ppg Econlite cement. • Basis for cement volume: • Cement from Landing Collar (100' below liner hanger) in 3-1/2" • Cement from TD to 9-5/8" OH Caliper + 20 Bbls. Est. TOC @ 340' above TOL With 4" DP. Est. TOC 270' above TOL Pipe Out. • Cement from 9-5/8" shoe to liner hanger (250') • 100' of cement above liner top. 3. Set liner hanger; 4. Set the liner top packer, 5. Pressure Test to 2000 psi. 6. POH and L/D DP & setting tool. 7. Set Bridge Plug at 200'. 8. Cement to surface with ~15 Bbls, 88 sx of 15.6 ppg Type C Permafrost Cement 9. ND -Release Rig 10. Complete Surface abandonment with Surface Casing and Conductor cut and placement Well abandonment marker. "~ s • White Hills Well #2 Mastodon 6-3-9 DIR / LWD FORM Est. EI. GL 387 HOLE CASING MUD INFO MWD MD TVD TVD3S DEPTH-RKB 21 SIZE SPECS Cementlnfo INFO 0' 0' 381' 16" Top ofSfc Cmt Plug 101' S' 376' 65 Ib/ft, L-80 16" Conductor 101' 101' 280' N/A N/A LWD/GR/RES 9-5/8" Britlge Plug 200' 200' 181' Surtace Csa MSL 381' 381' 0' 95/8" Leatl Slurtv 40 Ibs/ft 284 Bbls, 358 sx Wellbore Stability L~O,BiC-M to.7ppg LostCiralation ID. = 8.835" 4.15 ft3/sX HOIe Cleenng Int. Yeld 5750 psi Casing Sections collapse 3090 psi Casing Nkar Permafrost ~ 1,309 11,309 I -928' Tail Slum 45 BbLS, 220 sx Top of Liter Hanger 1,727 1,727 -1,341' 15.8 ppg & Packer Assbly 1.18 ft3/sx 3-1/2 LC 1,827 9.0-10.Oppg 8-5/8" Casing Point 1,877 1,872' -1,491' 12-1/4" 60 ° F Water Based Mud LWD/GR/RES! Porosity Inter Casino had SWm Welibore Stability 3-1 /2" 303 Bbls, 528 sx Lost ClfNlatlOn 9.3 Ibslft 11.2 ppg Hole Cleanng Float Collar L-80, IBT-M 3.2a ft3/sz Torque & Drag Top Lower Ugnu 2,815' 2,815 -2,434' ID. =2.as2 Casing Sections Int. Yell 10,180 psi Top Vtkst Sak D 3,067 3,067 -2,681' Collapse 10,530 psi Top V~kst Sak A-1 13,209 13,209 I -2,828' Top Coleville 3,995 3,995' -3,614' 8-1 /2" 9.0 - 9.4 PPO 3-1/2" Csg 4,845' 4,845' 4,464' 8-1 /2" 85° F Water Based 1 Rd Sampling 3 Mastodon 6-3-9 Well Bore.xis 3/14/2008 • • Drilling & Measurements 2525 Gambell Street. Suite 400 Anchorage AK 99503 Tel (907) 273-1700 Fax (907) 561-8317 Date: 15-March-2008 Well Name: Mastodon 6-3-9 Company: Union Oil Company of California API Number: 50-287-20023-00 AFE Number: UWDAK-E8000 DRL Location: X= 497,580.OOft US Y= 5,716,722.OOft US Field: White Hills Rig: Nabors 106 Schlumberger Drilling and Measurements Field Support: Operations Manager: Julio Loreto Field Service Manager: Franklin Medina Drilling and Measurements Field Crew: Cell Manager(s) Rene Franco. Cell Engineer David Ziegahn SERVICES PROVIDED Services Services Dates Depth Intervals Directional Survey Service 04-Mar-08 to 13-Mar-08 0 ft to 4845 ft PowerPulse* (Direction and Inclination) 04-Mar-08 to 06-Mar-08 250 ft to 1890 ft ARC* (Gamma Ray, Resistivity) 04-Mar-08 to 06-Mar-08 250 ft to 1890 ft sonicVISION* 04-Mar-08 to 13-Mar-08 250 ft to 4845 ft VISION* (Annular Pressure While Drilling) 09-Mar-08 to 13-Mar-08 250 ft to 4845 ft TeleScope* (Direction and Inclination) 09-Mar-08 to 13-Mar-08 1890 ft to 4845 ft EcoScope*VISION (Gamma Ray, Resistivity, Neutron, Density Azimuthal, APWD, Spectroscopy, & Fm Sigma) 09-Mar-08 to 13-Mar-08 1.890 ft to 4845 ft OPERATING STATISTICS Total MWD Pumping Time: 70.67 hr Total MWD Time Below Rotary: 1.62 hr Total MWD Depth Interval: 4539ft Total MWD Runs: 2 JOB PERFORMANCE Directional Total LWD Pumping Time: 70.67 hr Total LWD Time Below Rotary: 162 hr Total LWD Depth Interval: 4595 ft Total LWD Runs: 2 The final MWD survey point was 4770.19 ft with an inclination of 2.25 degrees and an azimuth of 237.06 degrees. A survey was straight line projected ahead to TD, making the final bottom hole location as follows: Measured Depth: 4845.00 ft True Vertical Depth: 4844.56 ft Displacement at Azimuth: 56.00 ft at 207.89 deg • • Formation Evaluation 12 1/4 irieh Surface Hole: This section was drilled in one run using PowerPulse (D&I), ARC (Resistivity, Gamma Ray) Real-time and Recorded Mode, sonicVISION* Service (Delta-T Compressional) Real-time and Recorded Mode. This run was drilled from 306 ft to 1890 ft. Then. 9 5/8-inch casing was set at 1872 ft. No problems were encountered with MWD services on this run. 8 ~/z inch Intermediate Hale This section was drilled from 1890 ft to 4845 ft MD in one run using Telescope (D&I), VISION* Service - EcoScope (Resistivity, Gamma Ray, Azimuthal Density Neutron & APWD) Real-time and Recorded mode. Once tools were on surface, data from memory was dumped and processed and Memory logs were delivered to onsite geologists for formation tops. SonicVISION* was run in Recorded mode only and data was processed by Schlumberger DCS and available in InterACT for download. During this run no significant shock were seen but there was a substantial amount of Sticknslip during the entire run. Schlumberger's IW~'F' system was used to send real-time surface and down-hole data to InterACT for all runs. Schlumberger Oilfield Services -Drilling & Measurements appreciates the opportunity to provide Union Oil of California with MWD and LWD services. Sincerely, Rene Franco Cell Manager Schlumberger Drilling & Measurements 2 ~ ~ Chevron s Chevron -Alaska Weekly Operations Report ~~~.~ `~ Well Name MASTODON 6-3-9 Field Name APIJUWI 502872002300 LeaseJSenal ADL 389986 Ong KB Elev (ftFCB) Water Depth (ft) Primary Job Type Drilling -Original Primary Wellbore Affected Original Hole Jobs Type Job Cai AFE No. Objective Aqua! Start End Date OC Eng Drilling -Original Drill UWDA... 2/27/2008 Walter Quay Dail Q 3/8/2008 --- - Operations Summary Complete Wiper trip, Wash to bottom, Flow line packed off with clay, clean out flow line, Circulate bottoms up x 3, Drill 9' to TD of 1890', Circulate, TOOH f/Csg, Lay Down LWD tools and BHA 3/7/2008 -- Operations Summary Run 45 joints 9 5/8" 40# L-80 casing, Circulate B/U, RIH w/ DP for stab-in cement job, stab-in, circulate, cement casing with 240 sacks (179 bbl) 10.5 ppg Permafrost type L (4.15 yield) lead slurry and 220 sacks (45 bbl) 15.8 ppg Class G (1.16 yield) tail slurry, total of 65 bbls cement returns at surface. Cement in place at 2230 hours. Contacted AOGCC (John Crisp @ 11:50 AM) concerning upcoming BOP test. 3/8/2008 Operations Summary POOH w/DP, Flush BOP stack, Install packoff and pressure test, ND diverter, Clean Mud Tanks, Test BOP's to 250 psi low/ 2500 psi high, test witnessed by John Crisp (AOGCC) 3/s/2aoa Operations Summary Complete BOP test at 0330, pressure test 9-5/8" casing to 2000 psi, P/U Drill pipe, cut and slip drill line, P/U 8 1/2" BHA assembly, test MWD/LWD tools 3/10!2008 Operations Summary RIH picking up DP, drill cement and float collar at 1788', Drill out 9 5/8" Shoe at 1872', drill to 1916' (26' of new hole), perform FIT to 15.5 PPG EMW, Drill 8-1/2" hole to 2431' 3H 1/2008 Operations Summary Drill to 3042', circulate hole Gean, short trip to shoe with tight spots at 2970', 2900, 2563', 2109'. RIH, drill to 3879'. Top drive torqued up and stalled, backing off saver sub and middle connection of stand being drilled. Circulate hole clean, POOH to check for loose cennections, found 4 loose connections, Tight spot at 3826' and had to backream through tight spot at 3550'. 3/12/2008 Operations Summary POOH to BHA, check all connections for torque. Replace top drive encoder. RIH & drill to TD I r~ • Chevron ~,~. ~~ Chevron -Alaska Weekly Operations Report t~~6 - ~ ~,~ Well Name MASTODOtd 6-3-9 Field Name APUUWI LeaSe/Serial 502872002300 ADL 389986 prig KB Elev (ftK8) Water Depth (ft) Primary .~ Type Primary WeMbore Affected Drilling= Original _-_ Original Hole ~ Jobs _ . ---- Type ,bb Ca[ AFE No. Objective - Actual Start End Oate QC Eng Drilling -Original _ Drill __ UWDA... ______ 2/2712008 i ~__ __ _ ___ - _ __ - -- Da t~s 2127/20Q8 ------ - ~ Operations summary Moving from Smilodon. N D BOP. RD and prepare rig for move. Move auxiliary equipment to Mastodon. ~I i I I I j ~, I I I I -- - - - ~ j I I i I i Mud System for Mastodon r Maunder, Thomas E (DOA) From: Maunder, Thomas E {DOA) Sent: Thursday, February 21, 2008 3:28 PM To: 'Quay, Walter [ASRC]' Cc: Buster, Larry W; Brandenburg, Tim C Subject: RE: Mud System for Mastodon {208-019) Walter, This is not an issue. Thanks for information. I will place a copy of this message in the file. Call or message with any questions. Tom Maunder, PE AOGCC From: Quay, Walter [ASRC] [mailto:WQuay@chevron.com} Sent: Thursday, February 21, 2008 3:20 PM To: Maunder, Thomas E {DOA) Cc: Buster, i.arry W; Brandenburg, Tim C Subject: Mud System for Mastodon • Page 1 of 1 Tom, As per our conversation, the mud system for Mastodon 6-3-9 {Permit 208-019) for the surface hole interval-2000') is changing from the PHPA-KCI mud system to a "Fresh Water Mud". The Production Interoat will be drilled as per plan with the PHPA-KCI system.. Walter Quay WQuay@chevron.com Office: 907-263-7812 Cell: 907-230-3961 2/2I/2008 ~1 ,,~ ~ icy ~ ~,~~ 6s: ~ , yy f ALASSA OIL A11TD GA.S CO1~T5ERQATIOI~T COMr-II5SI01~ Tim Brandenburg Drilling Manager Union Oil Company of California PO Box 196247 Anchorage, Alaska 99519 RE: Exploration, Wildcat, Mastodon 6-3-9 Union Oil Company of California Permit No: 208-019 Surface Location: 155 FSL, 2119 FWL, SEC. 6, Bottomhole Location: 155 FSL, 2119 FWL, SEC Dear Mr. Brandenburg: SARAH PALIN, GOVERNOR 333 W. 7th AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 T3N, R9E, UM . 6, T3N, R9E, UM Enclosed is the approved application for permit to drill the above referenced exploration well. This permit to drill does not exempt you from obtaining additional permits or approvals required by law from other governmental agencies, and does not authorize conducting drilling operations until all other required permits and approvals have been issued. In addition, the Commission reserves the right to withdraw the permit in the event it was erroneously issued. A weekly status report is required from the time the well is spudded until it is suspended or plugged and abandoned. The report should be a generalized synopsis of the week's activities and is exclusively for the Commission's internal use. A Sundry Notice (Form 403) must be submitted in advance of the planned surface abandonment. It is not possible to approved abandonment as part of the permit to drill. Operations must be conducted in accordance with AS 31.05 and Title 20, Chapter 25 of the Alaska Administrative Code unless the Commission specifically authorizes a variance. Failure to comply with an applicable provision of AS 31.05, Title 20, Chapter 25 of the Alaska Administrative Code, or a Commission order, or the terms and conditions of this permit may result in the revocation or suspension of the permit. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). incerel , Daniel T. Seamount, Jr. Chairman -~G . DATED this / / day of February, 2008 cc: Department of Fish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/o encl. - - ~'~ ~ ~ _ o ~ Laos STATE OF ALASKA of 2~~;/08 ALASKA OIL AND GAS CONSERVATION COMMISSION ? ~~' JOE w H5 OCI~~ ~Oi~ilfil3~~$I1~ PERMIT TO DRILL ,~~~`` Anchora~~ 20 AAC 25.005 1a. Type of Work: Drill 0 Redrill ^ Re-entry ^ 1b. Current Well Class: Exploratory Q Development Oil ^ Stratigraphic Test ^ Service ^ Development Gas ^ Multiple Zone ~ Single Zone ^ 1c. Specify if well is proposed for: Coalbed Methane ^ Gas Hydrates ^ Shale Gas ^ 2. Operator Name: Union Oil Company of California 5. Bond: Blanket Q Single Well ^ Bond No. 086S1035154066CM. 11. Well Name and Number: Mastodon 6-3-9 • 3. Address: PO Box 196247, Anchorage, Alaska, 99519 6. Proposed Depth: MD: 4685 TVD: ' 4685 12. Field/Pool(s): Exploration 4a. Location of Well (Governmental Section): Surface: 155 FSL, 2119 FWL, Sec 6, T3N, R9E, Umiat Meridan 7. Property Designation: ADL 389986 Top of Productive Horizon: 155 FSL, 2119 FWL, Sec 6, T3N, R9E, Umiat Meridan 8. Land Use Permit: ADNR LAS 26542 13. Approximate Spud Date: 2/23/2008 Total Depth: 155 FSL, 2119 FWL, Sec 6, T3N, R9E, Umiat Meridan 9. Acres in Property: 5587 14. Distance to Nearest Property: 17000' 4b. Location of Well (State Base Plane Coordinates): Surface: x- 497,580 ~ y- 5,716,722. Zone- ASP 4 10. KB Elevation _3~t~< 5 y195L- (Height above GL): 360' feet 1-~ ~ J 15. Distance to Nearest Well Within Pool: None 16. Deviated wells: Kickoff depth: feet Maximum Hole Angle: degrees 17. Maximum Anticipated Pressures in psig (see 20 AAC 25.035) Downhole: ~Ly yl /,y.f:~~`'Surface: /~ •. ~~ - c° l~, t . ~< 18. Casing Program: Specifications Top - Sett ng pth -Bottom Cem nt antity, c.f. or sacks Hole Casing Weight Grade Coupling Length MD TVD MD TVD (including stage data) Augered 16 65 N-80 Weld 80 0 0 ~ 101 101 As Required to Surface 12-1/4 9-5/8 40 L-80 BTC 1979 0 0 2000 2000 Lead: 264 bbls (250% excess) Tail: 45 bbls (40% Excess) 8-1/2 3-1/2" 9.3 L-80 IBT-M 2835 0 0 ~ 4685 4685 261 bbls (40 % Excess) 19. PRESENT WELL CONDITION SUMMARY (To be completed for Redrill and Re-Entry Operations) Total Depth MD (ft): Total Depth TVD (ft): Plugs (measured): Effect. Depth MD (ft): Effect. Depth TVD (ft): Junk (measured): Casing Length Size Cement Volume MD TVD Conductor/Structural Surface Intermediate Production Liner Perforation Depth MD (ft): N/A Perforation Depth TVD (ft): N/A 20. Attachments: Filing Fee ^ BOP Sketch Q Drilling Program Q Time v. Depth Plot Q Shallow Hazard Analysis 0 Property Plat 0 Diverter Sketch Q Seabed Report ^ Drilling Fluid Program Q 20 AAC 25.050 requirements ^ 21. Verbal Approval: Commission Representative: Date 22. I hereby certify that the foregoing is true and correct. Contact Walter Quay Printed Name Tim Brandenburg Title Drilling Manager Signature _~ Phone 263-7812 Date 2/4/2008 Commission Use Only Permit to Drill ~, r ^^ Number. ~-~~" -~ (/ API Nu _ 50- ~? ~'j 7-- Z1%C-3 ~ .j - ~.~~ PermitrAppro~ral r rN Date:. ; ,~ ; G (iF,' See cover letter for other requirements. If box is checked, well may not be used to explore for, test, or produce coal ed methane, gas hydrates, or gas contained in shales: Conditions of approval : Samples req'd: Yes[ No ^ Mud log req'd: Yes[+~ No^ r ~ HZS measures: Yes[ No ^ Directional svy req'd: Yes^ No© ' ~~Y ~`` ~ \ nL C~CC_Q ~~~ sL. ~ ~ ~r3,1 \ t ~ ~.L~C{ c xt . i 1Zt~-[1 ~ ti.l'v'~[.t( I 1 Z.t. h{'.~'~- ,~..~ ~ -. (v' ~ Lr2~ \~~ ,J ~ ~ ~ 1 ~, ao ~ac~sid3s ~ra~ Other: PROVED BY THE COMMISSION DATE: ~"!~" ~ ~ ,COMMISSIONER Form 10-401 Revised 12/2005 Submit in Duplicate `, sj1 ~. ~, vL'i, ORIGINAL ..~~~~.~ Cheer®n Timothy C Brandenburg Drilling Manager Februay 4, 2008 Commissioner Alaska Oil & Gas Conservation Commission 333 W. 7~` Avenue Anchorage, Alaska 99501 Re: Application for Permit to Drill Mastodon 6-3-9 Exploration Well Dear Commissioner: n Union Oil Company of California P.O. Box 196427 Anchorage, AK 99519-6247 Fax 907 263 7884 R ~r~ ^~ u ~ ~°'~1! ~~~~nF: _. ,. ~~~mmissio~q Enclosed for approval is a Permit to Drill (form 10-401) for Union Oil Company Of California to drill the Alaska North Slope White Hills Exploration well, Mastodon 6-3-9. Subject to AOGCC approval, it is intended to drill Mastodon 6-3-9 following the drilling of Smilodon 9-3-9 with Nabors 106E rig. Smilodon is presently drilling in the surface interval. An anticipated spud date is February 23, 2008. K A variance from requirements of 20 AAC 25.035, to utilize a diverter vent line diameter of 12" is requested. This is smaller than the planned surface hole of 12-1/4". A similar request was approved for Smilodon 9-3-9 well with Nabors 106E rig. The AOGCC is requested to treat as confidential all information included in the Application for Permit to Drill as information in these documents is drawn from research and data proprietary to Union Oil Of California a wholly owned subsidiary of Chevron Corporation. If additional information is required, please contact either myself or Mr.Walter Quay at 263-7812. Pertinent information attached to this application includes the following: 1. Form 10-401 Application for Permit to Drill - 2 Copies 2. Well Program 3. Wellbore Schematic 4. Drilling Fluids Program 5. Directional Program 6. As Staked Location Plat 7. Days Vs Depth Drilling Plot 8. MASP Calculation & Casing Design 9. Diverter, BOP and Choke Manifold Schematics 10. Shallow Hazard Analysis Sincerely, Timothy C. Brandenburg Drilling Manager Cc: Well File ORIGINAL Union Oil Company of California / A Chevron Company http://www.chevron.com f ~ r1g .. 2 of 36 Mastodon 6-3-9 Well Plan Summary Surface Location: X = 497,580' • Y = 5,716,722 As-Staked 155' FSL, 2119' FWL, Sec. 6, T3N, R9E UM Target Location: X = 497,580' Y = 5,716,722 To U nu 155' FSL, 2119' FWL, Sec. 6, T3N, R9E UM Top West Sak X = 497,580' Y = 5,716,722 155' FSL, 2119' FWL, Sec. 6, T3N, R9E UM Bottom Hole Location: X = 497,580' Y = 5,716,722 155' FSL, 2119' FWL, Sec. 6, T3N, R9E UM The well approaches within 17,000' of the nearest Chevron White Hills lease une. Estimated Start Date: 02/23/2008 - O eratin da s to com lete: 25 MD: 4685' ND: 4685 Elev. GL: 360' RKB: 20.5 Formation Markers: Formation To s MD -RKB ND -RKB TVD-GL Comments Base Permafrost 1309' 1309' 1288 To Prince Creek A 1683 1683 1662 To LowerU nu 2815 2815 2794 Top West Sak D 3062 3062 3041 Top West Sak A-1 3209 3209 3188 Top Coleville 3995 3995 3974 Est. TD 4685 ~ 4685 ~ 4664 Drill thru Mal uk #1 E uiv. Zone of 4850' to 4900' - Casina Proaram: Hole Size Csg/ Tb O.D. Wt/Ft Grade Conn Length Top MD/TVD Btm MDITVD rkb Au ered 16" 65# 80 80' GL 101' 12-1/4" 9-5/8" 40.0# L-80 BTC 1979' GL 2000'/2000' - 8-1 /2" 3-1 /2" 9.3# L-80 1 BT-M 2835' 1850'/1850' 4685'/4685' • ~ • 214/08 3 of 36 Mud Program: 12-1/4" Surface Hole (0-2000'): Fresh Water Mud - 6% KCL/PHPA Initial Value Final Value Densit 8.7 9.0-9.4* Funnel Viscosity g0-100 50-70 seconds Yield Point 35-45 25-35 cP Plastic Viscostiy (Ib/100 10-21 10-23 s 10 second Gel Strength 10-15 10-15 Ib/100 s 10 minute Gel Strength Ib/100 s 14-24 14-24 H 8.5-9.5 8.5-9.5 API Filtrate cc 8-15 6-8 Solids % 6-12 6-12 8-1/2" Production Hole 2000' - 4685' :Fresh Water Mud - s% KCL/PHPA/Clayseal Initial Value Final Value Densit 9.1 - 9.2 9.3 Max Funnel Viscosity seconds 40-65 40-65 Yield Point (cP) 15-25 15-25 Plastic Viscostiy (Ib/100 s 14-24 14-24 10 second el 4-8 4-8 10 minute el 6-13 6-14 H 9-9.5 9-9.5 API filtrate <4 <4 Solids % 6-12 6-12 Hydraulics: Surface Hole: 12-1 /4" Interval Pump Drill AV Pump PSI ECD Motor Jet Nozzles TFA GPM Pie f m -emw "/32 in2 0'-2000' 600 4" 14# 9.7 N/A Tbd tbd Production Hole: 8-1 /2" Interval Pump Drill AV Pump PSI ECD Motor Jet Nozzles TFA GPM Pie (fpm) p -emw ("/32) in2) 2000' - 4685' 450 4" 14# 9.6 N/A tbd .tbd 2~~ioa Loaaina Proaram: 4 of 36 Lo in While Drillin Hole Size Services Run 1 0-surf cs LWD: GR/Res/Sonic/Directional Run 2 surf cs -TD LWD: GR/Res/Directional Run 3 Mud Lo in Services 0-SUrf CSg mudlogger required from surface to TD 0-TD Bagged samples of cuttings every 30 feet, with 10 ft samples caught from sandstones and other potential reservoirs from surface to TD (both legs); three washed and dried cuts, one unwashed cut. Corin Hole Size Services surf cs -TD 50 rota sidewall cores ' Open Hole Logging Hole Size Services Run 1 8-1/2" GR/CN/ZDUXMAC Run 2 8-1/2" MREX Run 3 8-1/2" RCOR Run 4 $_1/2" RCI(MDT Type Formation Sampler & Pressure) Run 5 g_1/2" VSP Minimum checkshot Intearity Testina: Test Point Depth Test Type EMW Surface Casing Shoe At least 20 feet but not more than LOT 12.5 ppg EMW Estimated ' 50 feet of new formation Cement Calculations: Casina Size 9-5/8" Surface Basis: Lead: Based on conductor set at 101', 1208' of annulus in the permafrost @ 250% excess, + 1.91' of annulus to tail slur Tail: Based on 500' o en hole volume + 40% excess + 80' shoe track volume. Total Cement Volume: Lead 264 bbl / 1485 ft / 358 sks of Permafrost Type L at 10.7 ppg and 4.15 cf/sk. Tail 45 bbl / 255ft / 220 sks of Premium `G' at 15.9 ppg and 1.16 cf/sk. Production/Abandonment Liner: Casina Size 3-1/2" Liner Basis: Lead: Based on float collar 100'_below tl~e 1'irter hander, 40% excess volume in OH from shoe to surface shoe, 150' of liner la inside surface cam sin + 100' of excess above the liner to DP Out Total Cement Volume: Lead 261 bbls / 1464 ft / 452 sks of Premium Cement with Econolite at 11.2 ooa and 3.24 cf/sk ~g a~ ~, 2iv/08 Well Control: Surface hole will be drilled with a diverter. n 5 of 36 The MASP is 1560 psi. (See Attached) The intermediate/production hole well control equipment (of at least 3000 psi working pressure) consisting of will be equipped with pipe rams, blind rams, and an annular preventer will be installed and is capable of handling the MASP pressure. Based upon the planned casing test of 2000 psi for casing integrity considerations, the BOP equipment will be tested to 2500 psi. Disposal: • Cuttings Handling: Cuttings generated from drilling operations will be annularly disposed in the Smilodon 9-5/8" X 7':' Annulus or hauled or hauled to an approved ~~ disposal facility. ~--'7 ~---r ~~ rw5~b e ~ ~ ~~~ ~ ~--SM~~oc6~ • Fluid Handling:. All Mud and Used drilling and completion flui~s and other Class II wastes will be annularly disposed in the Smilodon 9-5/8" X 7" Annulus or hauled to an ~ approved disposal facility. ~ ~ ~ 2/4/08 6 of 36 Summary of Drilling Operations Pre-Rig Work: 1. Set and cement 16" conductor 2. Install cellar Rig Operations: 1. Nipple Up the 13-5/8" BOP diverter spool and riser in diverter mode. Function test diverter system. Provide the AOGCC at least 48 hours notice of each BOPE function pressure test so that a commission representative can witness the test 2. MU 12-1/4" drilling assembly. Drill surface hole to approximately 2000' (--700' below the permafrost). Drift the drillpipe to 2.4" min. ID for the stab-in dart. 3. Run and cement the 9-5/8", 40.0# surface casing back to surface. A Stab-in cementing system will be utilized. 4. RU the BOPE in BOP Mode and test to 250/2500 psi. Provide the AOGCC at least 48 hours notice of each BOPE function pressure test so that a commission representative can witness the test 5. MU 8-1/2" drilling assembly with MWD/GR/RES/ and RIH to float collar. Test the 9-5/8" casing to 2000 psi for 30 minutes 6. Drill out shoe joints and new formation greater than 20' and less than 50'. Perform the Leak Off Test. 7. Drill ahead to planned TD 8. Circulate and condition hole and perform wiper trip to surface casing shoe. POOH and stand back BHA. 9. RU Open Hole Wireline and run Logging Suite. 10. Run and cement the 3-1/2" P&A String. Test liner and packer to 2000 psi. 11. TOOH and LD drill pipe. 12. Complete surface abandonment of well, including the "Well Abandonment Marker". 13. Rig down and move off ~~~ ~~~~p~~~cs~~ab.. U`~E~cJ ~~~~~ 2i~ioa White Hills Well #2 Mastodon 6-3-9 DIR I LWD FORM Est. EI. GL 360' HOLE CASING MUD INFO MWD MD TVD TVD-SS DEPTH-RKB 21 SIZE SPECS Cement Info INFO 0' 0' 381' 16" Top ofSfc Cmt Plug 101' S' 376' 651b/ft, L-80 16" Conductor 101' 101' 280' N/A N/A LWD/GR/RE , ~ ~} ~~fi7r`~J JuuJJJ ~ 9-5/8" Bndge Plug 200' 200' 181' ~~ ~" Surface Csa MSL 381' 381' 0' 9-5/8" Lead 51um 40 Ibs/k 264 Bbis, 358 sx Wellbore Stability L-80, BTC-M 10.7 ppg Lost Circulation ID. = 8.835" 4.15 ft3/sx Hole Cleaning Int. Vield 5750 psi Casing Sections Collapse 3090 psi Casing Wear Base Permafrost 1,309' 1,309' -928' Top PCA 1,683' 1,683' -1,302' Tail Slum 45 Bbls, 220 sx Top of Liner Hanger 1,850' 1,850' -1,469' 15.a ppg 8 Packer Assbly 1.16 ft3/sz 3-1 /2 or 4-1 /2" FC 1,950' 9.0 -10.0 ppg 9-516" Casing Point 2,000' 2,000' -1,619' 12-1/4" 60 ° F Water Based Mud LWD/GR/RES/ Porosity IIFR/Cas 3-1 /2 or4-1/2"FC 1,950' Inter. Casino Lmd Slum Wellbore Stability 3-1/2" 2s1 Bbts, a5z sx Lost Circulation > 9.31bs/k 112 ppg Hote Cleaning Floa[ Collar L-80, IBT-M 3.24 ft3/sx Torque & Drag Top Lower Ugnu 2,815' 2,815' -2,434' ID. =2.ss2 Casing Sections Int. Yield 10,160 psi Top West Sak D 3,062' 3,062' -2,681' ~ _ _ Collapse 10,530 psi ~;,, 3 ~:,~ Top West Sak A-1 3,209' 3,209' -2,828' Top Coleville 3,995' 3,995' -3,614' RCI Sampling ....:a 8-1/2.. 9.0-9.4 ppg 3-1/2" Csg 4,685' 4,685' -4,304' 8-1 /2" 85° F Water Based Mud 7 of 36 2%4/08 8 of 36 Halliburton BaROi~ Chevron Mud Program White Hills Well #2 Mastodon Baroid Mud Program Halliburton Baroid Name (Printed) Signature Date Originator Dave Soquet Reviewed by Dave Higbie Customer Approval Walter Quay Version No: Date: 1.0 January 2, 2008 Mastodon v1.0 1 1/2/08 9 of 36 Halliburtoln BaROID Chevron Mud Program ~ Mastodon General Discussion This exploration well will be drilled from an ice pad south of Kuparuk. Due to the remote location, waste management is critical on this well. A 12'/" surface hole will be drilled vertically to a depth of -2,000' where 9-5/8" casing will be set and cemented. An 8'h" production hole will then be drilled vertically to a depth of -4,685'. 4-1/2" liner will be run and cemented at this depth. Spud the well with a 6% KCI/PHPA mud. Our primary focus for surface hole drilling operations will be adequate mud weight for well control and sufficient mud viscosity for efficient hole cleaning. This spud mud is formulated with two mechanisms to provide effective wellbore stabilization and minimize waste: ionic inhibition (KCI) and polymer encapsulation (PHPA). If mud from the previous well is in sufficient shape for surface hole drilling, consider recycling it on this well. This will reduce overall mud cost and supply an inhibitive mud with the PHPA already fully sheared. Clayseal will be added to the existing 6% KCI/PHPA mud for use in the production interval. This will provide another mechanism for inhibition and waste minimization and will facilitate drilling a gauge hole. If necessary, the weight will be reduced to 9.3 ppg prior to drilling out of the surface casing. Special Considerations: ,~ i. While gas hydrates are unlikely, maintain a sufficient quantity of Driltreat (lecithin) to accomplish a 2 ppb treatment in the event gas hydrates are noted. Contact the Technical Representative prior to any additions of Driltreat. ii. Lime and zinc carbonate should be on location for H2S contingency (@1 pallet No Sulf and 2 pallets ~"" lime). iii. Maintain an adequate barite supply (and other necessary products) to increase the mud weight of the current circulating volume by 1.5 ppg at any time (@1500 sx barite on location at all times). iv. Due to the remote nature of this location, maintain an adequate supply of LCM and the other mud additives, which may be required to support this drilling program. v. Reduce the potential for hole erosion/destabilization, hold the jet velocity below 200 fps while achieving pump rates to deliver AV's around the drill pipe in the 150-200 fpm range. vi. Some shale instability has been noted on offset wells (maintain tight filtrate control/mud weight). vii. Obtaining good logs and fluid samples are a key component of this drilling program. Maintaining low filtrate and using the inhibitive mud system will limit fluid invasion and help drill a gauge hole. viii. Maintain an adequate supply of STEELSEAL should losses be observed. String 3-5 sx/hr immediately after noting losses. Again, this will improve the post well fluid samples by limiting drilling fluid invasion. Well Specifics: Casin Pro ram MD TVD Foota e 12 %4" hole 9 5/8" casin 2,000' 2,000' 2,000' 8 %" Hole 4-1/2" liner 4,685' 4,685' 2,685' Mastodon v1.0 2 1/2/08 • • 2~a~Og 10 of 36 Halliburton BaROID Chevron Mud Program Surface Interval: 12'/4" to 2,000'; 6% KCI/PHPA Mud Properties Initial Value Final Value Densit 8.7 9.0-9.4* Funnel Viscosity (seconds) 80-100 50-70 Yield Point cP 35-45 25-35 Plastic Viscostty (Ib/100 sfJ 10-21 10-23 10 second Gel Strength (Ib/100 si) 10-15 10-15 10 minute Gel Strength (Ib/100 s fl 14-24 14-24 H 8.5-9.5 8.5-9.5 API Filtrate cc 8-15 6-8 Solids % 6-12 6-12 *Weight increase due to natural progression of solids. A weight up is not programmed. Base Formulation: COLD Water - 0.905 bbl KCI - 20 Ibs (30-32K ppm chlorides) EZ Mud DP - 0.75 Ibs (.15 ppb in initial mix) Dextrid - 3 Ibs (API filtrate of 8-15 cc initially) Barazan-D - 1-2 Ibs (as required for an initial 35 YP) KOH - 0.1-.25 Ibs (pH = 8.5-9.5) Aldacide-G - 0.25 Ibs (X-cide 207 for rig maintenance) Baracor 700 - 1 ppb Barascav D - 0.5 ppb (to be added at the rig when first circulating) ** Use Barite for any needed weight ups on this well. NOT drill solids. A strong focus on minimizing waste needs to be in place before and while drilling all sections of this well. Do not jeopardize the integrity of the fluid system; however, all efforts need to be made to this end. Allow the pit volume to deplete prior to TD on the surface hole. This will leave more room in the pits for displaced mud when cementing. Ensure all solids control equipment is working properly prior to spudding. Utilize shakers, desanders/desilters, mud cleaners and centrifuge(s) to reduce solids and reduce dilution. No processes should take place that will lead to a build up of low gravity solids in the mud. On an example well, some of the centrifuge under-flow was returned to the mud system. This led to a fines build up and the resultant required dilution was excessive. The personnel were trying to reduce waste but wound up causing additional waste. Build and maintain the system with COLD water. All attempts to keep the temperature of the mud <75°F should be made. Normal surface hole viscosities should be adequate for this vertical well. Maximum flow rates should be used to ensure good cuttings transport. Target an initial YP in the 35-45 range then adjust as dictated by the actual hole cleaning requirements of the well (On offset wells, pea gravel was noted to 500', then mainly sticky clay and sand was observed). Reduce viscosity as allowed, previous wells in the area have TD'd the surface with a ~18-25 YP. However, do not hesitate to quickly raise the viscosity if hole cleaning problems develop. Polymer viscosity in the form of Barazan D additions should be utilized to provide Theological support as needed. Utilize high viscosity sweeps to supplement the hole cleaning capabilities of the system. Mastodon v1.0 3 1/2/08 ~ ~ 2i~/pg 11 of 36 Halliburton BAROID Chevron Mud Program Spud the well with an 8.7 ppg mud. Expect the natural progression of the weight as drilling proceeds. Increase the mud weight as dictated by actual hole conditions. If gas hydrates are encountered in the surface interval, special operational conditions will need implemented. To minimize the potential for difficulties due to hydrate occurrence, the following suggestions are offered: • Control drill the interval. This limits the amount of cuttings in the well bore which might contribute hydrates. • Use slower pump rates to minimize the potential for bringing up large volumes of hydrates all at once and overloading with gas cut mud. • A two pound per barrel treatment with Driltreat (Lecithin) could provide some inhibition of the hydrate break-out. Contact the Technical Representative prior to any additions of Driltreat. • Keep the mud as cool as possible to minimize thawing of the hydrates. Mud up with cold water and dilute with cold water. • Milne Point and Tarn operations have reported benefit from treating with 1% DriI-N-Slide. The mud engineers state that it acts to smooth out the rheology of the fluid. If possible, use 6% KCI water (COLD) to maintain volume while drilling ahead. Maintain the mud chlorides ~ 28,000 - 34,000 ppm with KCI. Use Dextrid and PACs for API filtration control. Target 8-15 cc initially, dropping the fluid loss to the 6 cc range prior to running casing at the surface hole TD. Hold the pH in the 8.5-9.5 range with KOH. Mix 0.15 ppb of EZ Mud in the initial mix. Once the mud has sheared through the bit twice, slowly increase the EZ Mud concentration to the full 0.75 ppb. Daily additions of X-Cide 207 are needed to control bacterial action. Should bacteria become a problem, hold a safety meeting and add the desired amount of Aldacide G using all the proper PPE. High levels of corrosion have been seen when running KCI fluids in other areas on the North Slope. Barascav D and Baracor 700 levels will be maintained at programmed levels. As noted on offset wells, heavy amounts of clay will be present from about 500' onward which will require additions of DriI-N-Slide and/or Condet to reduce BHA balling and screen blinding. Sweeping the hole with high viscosity or Barolift sweeps prior to the short trip at TD and again prior to coming out of the hole to run the surface casing is recommended. If possible, reduce the fluids rheology to those recommended in the cementers program after the casing is on bottom. It is important to exercise caution to minimize the potential for creating a situation of lost circulation. Tripping speeds and casing running speeds should be slowed to reduce the effects of surge pressures on the formation especially with this elevated rheology. Do not attempt to run casing if the well is not in stable condition. Pumps should be "staged" on line slowly to avoid surging the hole and the pipe rotated to break the mud's gels before turning the pumps on. Mastodon v1.0 4 1/2/08 12 of 36 Halliburton aaROID Chevron Mud Program ~ Production Interval: 8'/2" to 4,685'; 6% KCI/PHPA/Clayseal Mud Properties Initial Value Final Value Densit 9.1 - 9.2 9.3 max Funnel Viscosity (seconds) 40-65 40-65 Yield Point cP 15-25 15-25 Plastic Viscostty (Ib/100 s~ 14-24 14-24 10 second el 4-8 4-8 10 minute el 6-13 6-14 H 9-9.5 9-9.5 API filtrate <4 <4 Solids % 6-12 6-12 * Unless hole conditions dictate otherwise Treat the mud with bicarb and citric acid prior to drilling out. Drill out using the existing mud system from surface hole. Some whole mud dilution may be required to reduce solids content and MBT to an acceptable level. Add Clayseal slowly until a final concentration of 0.84 gal/bbl is reached. Maintain this concentration until interval TD. Decrease the API filtrate to <4 cc/30 for the interval using Dextrid and/or PAC L. Keep low gravity drilled solids to a minimum (<6% by volume if possible). Maintain the MBT at <12 ppb through dilution and solids control. Maintain the pH between 9.0-9.5 with KOH. Daily additions of Aldacide G/X-Cide 207 should be made to control bacterial action. The chloride level should be kept in the 28-34K range through additions of KCI. The EZ Mud concentration should be maintained at .75 ppb. A 15-25 YP should be maintained using Barazan D+. On Amethyst #1, some shale splintering was seen at 4,300', requiring aweight-up to 10.5 ppg. Proper drilling practices should be employed to minimize mechanical disturbance in this interval. If splintered shale is seen at the shakers, consider weighting up a minimum of .4 ppg and maintain this weight until TD. Additions of Baranex and Barotrol at 4 ppb and 2 ppb respectively are recommended, as well. Special efforts should be made to keep ECD's and surge/swab pressures to a minimum. This will reduce the chances of lost circulation and also reduce damage to the exposed shales. If seepage losses are noted while drilling the sands, immediately string in STEELSEAL at 3-5 sx/hr. Obtaining good logs and fluid samples are key goals of the well. Mastodon v1.0 5 1/2/08 2/4/08 Chevron Mastodon (P1) Proaosal 1 m ~r~ Report Dater January 2, 2008 Survey I DLS Computation Method: Minimum Curvature / Lubinski Client: Chevron Vertical Section Azimuth: 90.000° Field: White Hills Chevron Vertical Section Origin: N 0.000 ft, E 0.000 ft Structure 1 Slot: Mastodon /Mastodon Slot 1 ND Reference Datum: Rotary Table Well: Mastodon TVD Reference Elevation: 382.0 ft relative to MSL Borehole: Mastodon Sea Bed 1 Ground Level Elevation: 360.000 ft relative to MSL UWIIAPI#: 50029 Magnetic Declination: 22.534° Survey Namel Date: Mastodon (P1) /January 2, 2008 Total Field Strength: 57548.181 nT Tort 1 AHD I DDI 1 ERD ratio: 0.000° / 0.00 ft / 0.000 / 0.000 Magnetic Dip: 80.310° Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: January 04, 2008 Location LatlLong: N 69 3814.050, W 1501 8.355 Magnetic Declination Model: BGGM 2007 Location Grid NIE YIX: N 5716722.000 ftUS, E 497580.000 ftUS North Reference: True North Grid Convergence Angle: -0.01780104° Total Corr Mag North -> True North: +22.534° Grid Scale Factor: 0.99990001 Local Coordinates Referenced To: Well Head_ Comments Measured Inclination Azimuth Sub•SeaND TVD Vertical NS EW Mag 1 Grav DLS Directional Northing Easting Latitude Longitude Depth Section Tool Face Difficulty ft de d ft ft ft ft ft de de 1100 ft Index ftUS c-fnn nn ftUS An~G4n nn AI CD Z4 7A nr;n _. \Ar 15n ~ Q 1~. ~. KKti u.uu u.uv u.uu -~oc.uu v.vv v.~v v.v~ v.vv -- ~ ~~ -~~ ~~~~~~ ~• ~~ ~~ ~~~~~~ •~ ~~~ ~ ~~~~~ 16" Conductor 101.00 0.00 0.00 -281.00 101.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 200.00 0.00 0.00 -182.00 200.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 MSL 382.00 0.00 0.00 0.00 382.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 400.00 0.00 0.00 18.00 400.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 600.00 0.00 0.00 218.00 600.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 800.00 0.00 0.00 418.00 800.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 1000.00 0.00 0.00 618.00 1000.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 1200.00 0.00 0.00 818.00 1200.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 Base Perm 1309.00 0.00 0.00 927.00 1309.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 1400.00 0.00 0.00 1018.00 1400.00 0.00 0.00 0.00 -- 0.00 0.00 5716722.00. 497580.00 N 69 38 14.050 W 150 1 8.3~ 1600.00 0.00 0.00 1218.00 1600.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.3 Top PCB 1683.00 0.00 0.00 1301.00 1683.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 1800.00 0.00 0.00 1418.00 1800.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 9-5/8" Csg 2000.00 0.00 0.00 1618.00 2000.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 2200.00 0.00 0.00 1818.00 2200.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 2400.00 0.00 0.00 2018.00 2400.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 2600.00 0.00 0.00 2218.00 2600.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 2800.00 0.00 0.00 2418.00 2800.00 0.00 0.00 0.00 - 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 Top Lower Ugnu 2815.00 0.00 0.00 2433.00 2815.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 3000.00 0.00 0.00 2618.00 3000.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 Top West Sak D 3062.00 0.00 0.00 2680.00 3062.00 0.00 0.00 0.00 -- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 13 of 36 WeIlDesign Ver SP 2.1 Bld( doc40x_100) Mastodon Slot 1\Mastodon\Mastodon\Mastodon (P1) Generated 1/2/2008 11:03 AM Page 1 of 2 2/4/08 14 of 36 Comments Measured Inclination Azimuth Sub-SeaTVD TVD Vertical NS EW Mag 1 Grav DLS Directional Northing Easting Latitude Longitude Depth Section Tool Face Difficulty k ---- de d ft ft k k ft de de 100 k Index kUS kUS 1~1 ~ 9GG 3ZUU.UU U.VV U.UU L8.18.VU SLUU.VU V.VV V.VV V,VV --- u.uu u.w of for «.oo Yar ooo.vo i. v~.v~ i~.v.,v vv i.vv i v..,.v.v Top West Sak 8 3209.00 0.00 0.00 2827.00 3209.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 3400.00 0.00 0.00 3018.00 3400.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 3600.00 0.00 0.00 3218.00 3600.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 Top Coleville 3645.00 0.00 0.00 3263.00 3645.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 3800.00 0.00 0.00 3418.00 3800.00 0.00 0.00 0.00 -- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 4000.00 0.00 0.00 3618.00 4000.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 4200.00 0.00 0.00 3818.00 4200.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 4400.00 0.00 0.00 4018.00 4400.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.355 4600.00 0.00 0.00 4218.00 4600.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.35 TD / 7" Csg - 4685.00 0.00 0.00 4303.00 4685.00 0.00 0.00 0.00 --- 0.00 0.00 5716722.00 497580.00 N 69 38 14.050 W 150 1 8.3 Le gal Description: Northi ng (Y) [ftUS] Easting (X) [ftUS] Surface : 155 FSL 2119 FWL S6 T3N R9E UM 5716722.00 497580.00 BHL : 155 FSL 2119 FWL S6 T3N R9E UM 5716722.00 497580.00 WeIlDesign Ver SP 2.1 Bld( docAOx_100) Mastodon Slot 1\Mastodon\Mastodon\Mastodon (P1) Generated 1/2/2008 11:03 AM Page 2 of 2 Chevron ~ 2,'4;08 15 of 36 ALL Mastodon (P1) FIELD White Hills Chevron STRDDTDRE Mastodon Magnelk Paamelers 8udace LOtallon NAD2]AksMa Stale Planes, ZOne 04, U5 Fee1 Miscelbtneous Mode: BGGM 200) Dip: 811.310° Dade: nuary 09, 2o0a lal: Nfi938 t9.O5D No06'mg: 5]16]2200 flU5 Grk DOnV:-0.01]60109° 5k1: Mayotlon 51011 ND ReI: Rotary Talk (382.OOfl above MSL) x22534° 5]5482 nT Lon: W15018355 Easling: 49]S600D iU5 ale Fact 0.9999000D6T Plan: Maslotlon (Pt) Srvy Dale: January o2, 2008 -1800 -1200 -600 0 600 1200 0 600 1200 1800 d= O O CD C 2400 >~ F- 3000 3600 4200 ° 16" Conductor MSL se Perm op PCB 95/8" Csg op West Sak D ,.. op West SakB _ .. A ,. . ,oP Coleville"..p-., " .- ,, a-...,~....a .. 7D l7" Csg astodon (P1) -1800 -1200 -600 0 600 1200 Vertical Section (ft) Azim = 90°, Scale = 1(in):600(ft) Origin = 0 N/-S, 0 E/-V 0 600 1200 1800 2400 3000 3600 4200 ~~ REV DATE BY CK APP DESCRIPTION REV DATE BY APP DESCRIPTION 2T Mpg 16 of 36 N wlw w w ~~ ~~~ C~~-' T 4 N T3N J~ ~ s 4 ~ i a s (JQP ~z ~; THIS SITE f ~ ~a 3 ~a 1 ~s ~s SCALE: ~ _ ____ ~~~~ _ 1" - 200' ~ 19 20 1 22 23 24 NOTES: - f ~ 3 29 28 '; 7 26 I 25 1. COORDINATES SHOWN ARE NAD 27 '. _ __. '._ _ ALASKA STATE PLANE ZONE 4. T 3 N 3 32 3 O 34 35 36 2. GEOGRAPHIC COORDINATES ARE NAD ___ _.._....o 27. T2N ~ ~ 3. ALL DISTANCES ARE GROUND. 4. ICE PAD IS ROTATED 70° EAST FROM ~p NORTH. QpS Q~~ 5. VERTICAL DATUM IS ASSUMED. ww (w eo€rn w rn°_ ~~ moo' VICINITY MAP 1" = APPROX. 3 MI. :MASTODON ~'~'~-°°~ MASTODON ``., LOCATED WITHIN PROTRACTED -- - SEC. 6, T 3 N, & R 9 E, '"`~~ % ~ UMIAT MERIDIAN. ~ I ° 155' F. S. L, 2119' F.W.L. '~ LAT = 69'38'14.05" N ,'~~ 'F i LONG = 150'01'08.35" W ' ' g00 ~ Y = 5,716,722' ~p E ~ , X = 497,580' N # ~ O, "} Z .. '~ ~~ ~ 0 ° ROP o, o ~cE ~` F ° eR°QOSE ~~ DENOTES SPILL TRAJECTORY ~ ~ vo ~ ~ STAKED CONDUCTOR LOCATION a ~, o. ~ ~ g0~ ~0 W ' 5 LOUNSBURY & ASSOCIATES, INC. SURVEYORS ENGINEERS PLANNERS ®~ MASTODON WELL AS-STAKED DRAWING UNION OIL OF CALIFORNIA WIT}-I TOPO AND SPILL TRAJECTORY CADD FILE N0. DRAWING N0: SHEET: REV MASTODON TOPO 25 SEPT. 07 1 OF 1 D 2/4/08 0 1000 2000 w ~, 3000 a A 4000 5000 6000 Mastodon Depth vs. Time 17 of 36 Ri Release to Mastodon Actual Rig Accep -~-Mastodon Plan 12-1 /4" Hole 9- /8" Casing -1/2" Hole Logging 3-1 2" Tubing/P&A 0 5 10 15 20 25 30 Time (Days) 2/4/08 18 of 36 Calculation & Casing Design Factors - Mastodon 6-3-9 White Hills Exploration WELL: Mastodon 6-3-9 FIELD: White Hills DATE: 28Jan-08 DESIGN BY: W. Quay Sect. 1 12 1/4" hole MUD WT. 9.5 PPG MASP= 0 Diverter Sect. 2 8 1/2" hole MUD WT. 9.3 PPG MASP= 1,648 psi TENSION MINIMUM COLLAPSE COLLAPSE WEIGHT TOP OF STRENGTH PRESS @ RESIST. MINIMUM DESCRIPTION W/O BF SECTION TENSION WORST CASE BOTTOM w/o TENSION WORST CASE MASP YIELD WORST CASE SECTION CASING BOTTOM TOP LENGTH WT. GRADE THREAD LBS LBS 1000 LeS SF TENSION PSI* PSI SF COLL. PSI"* PSI SF BURST 1 9-5/8" 2,000 0 2000 40 L-80 BTC 80,000 80,000 916 11.45 904 3,090 3.42 1,641 5,750 3.50 TVD 2,000 0 2 3-1/2" 4,685 0 4685 9.3 L-80 IBT 43,571 43,571 207 4.75 1,534 10,530 6.86 2,356 10,180 4.32 TVD 4,685 0 " Collapse pressure is calculated; Normal Pressure Fluid Gradient for external stress (.452 psi/ft) and the casing evacuated for the internal stress (0 psi/ft) "" See attached sheet for calculation of MASP 214/08 Maximum Anticipated Surface Pressure Calculation Mastodon 6-3-9 White Hills Exploration Assumptions: 19 of 36 1. Based on offset drilling data & G&G evaluation and analysis, the pore pressure gradient is predicted to be a a normal 0.433 psi/ft gradient from surface to planned total depth at 4685' TVD BRT. 2. The M.A.S.P. during drilling operations will be governed by the 9-5/8" shoe frac gradient, and is calculated based on a full column of gas between the 9-5/8" shoe and the surface. With the shoe for Smilodon at 2000' TVD, the Leak-off is anticipated to be --12 ppg EMW. 3. The M.A.S.P. during production operations will be the estimated SIBHP minus the gas hydrostatic pressure between TD & the surface. M.A.S.P. Drilling 8-1/2" Hole at 4685' TVD Max. pore pressure at T.D. = 4,685 ft. x 0.433 psi/ft = 2029 psi ~' M.A.S.P. = 2029 psi - ( 0.1 psi/ft x 4685 ) = 1560 psi / • 2iaioa LEAK OFF TEST PROCEDURE 1. Clean out the rathole below the shoe, and drill 20' of new hole. Circulate and condition mud. 2. Pull the drill string into the shoe. Rig up to observe annulus pressures. 20 of 36 3. Close the pipe rams and pump down the drillpipe at a slow rate (1/4 - 1/3 BPM) if exposed formation is permeable. Anon-permeable formation should be step tested to a predetermined pressure. 4. Measure the volume pumped and plot annulus pressure-vs-cumulative volume pumped. Compare annulus pressure to drill pipe pressure and confirm both are the same. Record and plot pressure versus volume pumped. The pumps should be shut down immediately upon indication of leak-off. Record the inital, shut down pressure and the pressure after 1, 2, and 3 minutes. 5. Release pressure and record the volume of fluid recovered in the trip tank. The point "B" shown in the attached graph at which the plot of drillpipe pressure stops increasing equally as the volume is pumped is called the P.I.T. limit, Leak Off, or pressure integrity test limit. The leak-off pressure is calculated as follows: Leak-off (EMW) = Mud weight in hole + P.I.T. (PS11 (0.052) X (shoe depth in TVD ft.) This equivalent mud weight should be made known to all drilling personnel to ensure it is not exceeded. See the drilling procedure for guidelines on expected LOT's or pressure integrity test limits for each casing shoe. SURFACE PRESS. TYPICAL PIT PLDT {psi] VOLUME PUMPEd SHUT-IN-TIME [BBLS] [MIN] NOTES: Point "A" will have some variance until the system begins to pressure up. Point "B" is the leak off and is abbreviated LOT. Point "C" is known as the injection pressure and is usually dependent on rate. Point "D" is known as the fracture closure pressure and may not stabilize if permeable formations are exposed. Date - 31 January, 2008 Location -Mastodon 6-3-9 Rig -Nabors 106E tatting :E DIVERTER STACK-UP f 6 ~~ ~~~ ~~ -~:;_ k: Size - 13 5/8" Pressure Rating - 3000 PSI Nace Trim - Yes lar: Make - Shaffer Model -Spherical Nace Trim - Yes Ive: Make FNW Model - 61 B fee: Make VG Model - S137 ~~ ' Cu~R'~'~ijUr1~~ Make -Academy Model Number - H180T resigned Pressure Rating - 3000 ator: Number of Bottles - 12 Gallons/Bottle - 15 Total Volume - 180 Pre-Charge Pressure - 1000 ets: Size - 4" Valve - Ball Form DRLG-01, May/2001 214/08 North Slope Alaska White Hills Prospect SHALLOW HAZARD ANALYSIS MASTODON 6-3-9 CHEVRON ACREAGE 23 of 36 MidContinent/Alaska BU Chevron North America Exploration and Production Company 11111 S. Wilcrest Houston, TX 77099 - - - - -•~ a- _, -_:af _~~~ ~,~~~;~ _ - ._ • -~ _ ~ , ; _ -_. _ ~' + n ,~ -~ ~ ~~ ,ar_~ , - .~ r ~ i ~- _ , , , ~ ~ -- ~C ,s , - _ - ti _ , ~ r i.,; z .. 1 ` i , ~ ~ - , ~ - - ~ I hl ~ -... =.J,~ __ ii . i, ~ A. _ _ f f l_ ._ __y- << .F. 1~I . lF.T} ~ ° .. -r _ 1 ~.. . ~ ,. - i.- i'~ - ... _. ... w.. - .f _. _. ~':., . r. . - ~ _ ~ Mil ~~ + _ _. ~ ,III `':}\ -_ . 7 . _ _. ~ ~- -_-._ l I _ w til _~ . L~ ~'{ ~I~~~t t `~ l~ I `~ II 1 I I 15 ~_ ~i ~ C'L.Y 100"~ . _ . , . • i 2j4/08 24 of 36 Union Oil Company of California (UOCC), a wholly owned indirect subsidiary of Chevron Corporation currently has leased approximately 20 x 40 sq miles of acreage on the Central North Slope of Alaska (Fig 1). UOCC ~ holds 10_0% working interest in the field which is bounded by the National Petroleum Reserve of Alaska (NPRA) to the West, the Trans-Alaska Pipeline (TAPS) to the East, Kuparuk River and Prudhoe Bay Fields to the North and the Brooks Range Foothills to the South. STRaTIGRAPHY & RESERVOIR OBJECTIVES ~~~ 1~y ~_~~~'. f!I~ ~J~ I ' ~i _ E ra3~~~~_~ i c I _ _ _ - - . - ~ _''' _ ~ ; ~ ; _ ~ I ~ _ _ - ._,;, _. - _ t - -, .. - - °--- _ _ ~--- -- ~ ~- :::.c.. ~ _ __ L r ` { .a--~-~-, ~ --, ~~--~ i _. .x i W ~ , ,. ~ _ _ , ,. u] ~ h;~~Et.~lib Fit i. ~- _c~~ T-~ ! ~ -~ ~ i ~~ 3~~45-eta ('`~:~~'~ _ _-- -f`i _~' ~ ;C~ -_ .~. _~ ~~ ~aTft i ..._. ~ ~ ~ ~ ~ __ __ ~I .. ..._ - '~ ' - . _. .. ...._ . c_ .. 39E~~~~~E~'Fl~khf -~~, <C?-i~~it - ~_ _ -' t~~fiEE~.~E~~~.~Ei~''. E ~ ~I ~~ `:ti~~r_:.i~ _~i_i _, ~~_ c _ n Fig 2: White Hills Stratigraphy The Mastodon 6-3-9 well will target reservoir objectives in the shallow Tertiary through Upper Cretaceous (Mastrictian) strata referred to as the Saganivriktok, Prince Creek, Ugnu and West Sak Formations bounded at ~ the top by the permafrost and down to a total depth of approximately 5000 ft MD. Overall, the sequence records aregressive-transgressive cycle starting with the West Sak (Schrader Bluff) shallow marine prograding shelf sands, overlain by Ugnu fluvial-deltaic and then Non-marine Prince Creek and Sagavanirktok clastic strata. (From USGS Open-File Report 2005-1182) 2 • 2P4/08 PRINCE CREEK FORMATION Sagavanirktok Group and Prince Creek Formation 25 of 36 The Mastodon 6-3-9 well will spud in Tertiary generally upward-coarsening Sagavanirktok siltstones, fine to very-fine grained sandstones, interbedded bentonitic mudstones with minor lignite horizons, and gravels deposited under shallow marine to non-marine conditions. Below the Sagavanirktok Group are undifferentiated Prince Creek coarse clastic strata, comprised of gravels, coarse lithic sands, lignites, and siltstones. The Prince Creek sandstones typically exhibit 8-30% clay content, with porosities to 38% and permeabilities to several darcies. UGNU FORMATION Upnu Sands The Early Paleocene Ugnu Formation consists of upper-fine to medium and coarse grained lithic sandstones, siltstones, bentonitic shales, lignites, and some gravels deposited in anon-marine delta plain environment. The sandstones are poorly indurated to unconsolidated, with porosities exceeding 35% and to several darcies permeability. Heavy oil saturation is common 30 miles to the north in Kuparuk River, Milne Point, and Prudhoe Bay fields. WEST SAK FORMATION West Sak Sands The West Sak consists of a shallowing upward shallow marine sequence comprised of very fine-grained, single and amalgamated hummocky cross-stratified sandstone beds. The formation is typically characterized by fine to medium-grained, unconsolidated but well sorted sands interbedded with siltstones, mudstones, and coals. The West Sak sands were deposited in a shoreface to proximal shelf environment. Lower West Sak members were deposited in a lower shoreface to inner shelf setting by storm-generated waves and currents, both the upper and lower members showing good continuity both in the subsurface in areas with good control and in the outcrops to the southwest and south. The Mastodon 6-3-9 well will TD at the base of the West Sak Formation at approximately 5000 ft MD. 2/4/08 STRl1CTlJRE 26 of 36 I oss of freyuei~cies duc tee i i ,,;,1 ~ _». ~ ». Ik„ '' ..~ _.. ,~, ^~ ... .» °,. _ r _ ~ __ -<.-.~ .. ». ~ . ,.., ~ ,, _ . k _. ._.~ _. _ ... .~ - ~ ~ ..w ~ _ ... W. .~, ..y •r ~, r. _.. ~~ .wrw , .. ~w .... Yap. ~ .....e v r.« n ~.wa~r _a. ~ ..~ N .: \N ~ ~~ -.. ;.. . ~Dr.._A.. a t •~ ~! ,w_ M ~ .. •'•'~ts ~ .. ~Y.~ , ~. . k -~.... _._ .. .. - .. a~, v .. .. .. . 4 ~ .. «.. . i ~ _..., -~ wa ~.:.~ i ' y `5. ~ \ E ~. "' ~ a - ~ ~ Fig 3: Pre-stack time migrated 2D White Hills 2D seismic line (ku92-111); dip direction The regional structure on the top of the West Sak in the vicinity of the Mastodon 6-3-9 well is a monocline that strikes north-south and dips eastward at between 1 ° and 2°. The reservoir occurs at relatively shallow depths within the West Sak core area, with the top of the "D" sand being located at between -2536 and --2801 feet subsea. To the west of the core area the top of the West Sak shallows until it intersects the base of the permafrost at about 1,000 feet subsea to the west of Mastodon 6-3-9. The Mastodon structure consists of aNorthwest-Southeast trending closure with stratigraphic and dip related ~~ traps. The structure is thought to have both permafrost and temperature seals. • The structure shows distinctive depositional fairways for sand accumulation based on 2D seismic, surface geology, and magnetic data. The structure sub-outcrops at certain places throughout the field allowing regional correlation between the source rock and target formations. The primary reservoir objectives include gas in the Prince Creek, Ugnu and West Sak formations. 4 214/08 ~~;*- GEOPHYSICAL DATA QUALITY _: t,r. _ _,. ~ - ~. ~ - -~ ~ ~~. } _ - - --- rte, `~ ~ - ` ~ ~ ~. - ~ ~, _ ~_ _. - ~~.~-.~ - _ ~. _ _ a. _ ~ -, _ _ -. '~ ~ y ~. ~- .-_ ' ` ~ ~ , . -~, _, - ~ - - k' _ _ ,.F, , - -- i ~ ~~ ~ i p.1 _ - - E~. _ _~. . ~ ~'~ __ _ _ S ti` ~ 9 ~ `~ ,~.. -~ _ ~ , . - era _~ - h .,- _ _ ~ - - F t = ~_ ,, _. . _ _ -- -_ r tt~ r, ~ ",. ii __ _E~~e _~ . ri a.-~i ._ ~'~~ 'r~~ ~ ~ -- - i _ _ '~ . -~ '.'s(y ... ~~ --. .r: __. ~ _. / t ~ F.., Fig 4: Approximate mapped extent of poor quality 2D seismic data 27 of 36 Chevron has an extensive grid of 2D spec data. With our working interest participation in the Kuparuk and Prudhoe Bay fields, we have obtained as much well data and 3D seismic as we are entitled too in order to characterize the White Hills area south of the current main producing fields. Currently, our key 2D lines through the White Hills prospective area have undergone several stages of reprocessing. In 2002, GeoTrace produced apre-stack migration data set which was later reprocessed by 5 24/08 28 of 36 Unocal in 2005 to attempt to apply newer noise reduction techniques. However, after the merger with Chevron, and high grading of the White Hills prospective area, it was decided to try and increase the signal to noise ratio of the data further by applying Chevron's proprietary noise attenuation technique. This was in effort to enhance the image in a large swath of low frequency, poor quality data (Fig2). This poor data zone is coincident with a large portion of the Chevron acreage on the Central North Slope. 2007 DATA ACQUISITION The drilling program for the White Hills area was developed from both geologic and geophysical data sets. The results of the various reprocessed datasets were evaluated and it is clear that the current data quality is not sufficient to determine potential shallow hazards and completely validate well location placement. In the winter of 2007 (Jan 5-Feb 11) nine 2D lines, approximately 170 sq miles as outlined on Fig 3, were acquired over the White Hills area by CGG Veritas. The survey was designed to tie the current proposed well locations in a North-West -- South-East strike direction with two long North -South tie lines. Every attempt was made to avoid water bodies whenever possible due to the potential statics issues that ice lakes have on seismic data. s _. ,~ F,. '~,r . - ~. ~_ ~ ~ ~.. ~~ t` ~ Ik ~c -.: ~ r~ti F -. - ', ~ y Y. ~ ~: ,~ ~. `t ~ d:1 L~C r ~' ., ~~ "' t m~,~~-. Fig 5: Chevron 2007 2D seismic acquisition lines; acquired by CGG Veritas 6 • ~ 2/4/08 29 of 36 ;; ;6.:~ 1icaR3e~~ POTENTIAL SHALLOW HAZARDS 1~ ,, ?t~ _~ ._, . 3 r ~ ~ - ~ -~,~. Permafrost is expected to 1000 ft below the surface and there is the possibility that gas hydrates could be present although not expected. The current known accumulations of Gas Hydrates (Fig 6) do no appear to be present in the White Hills prospective area. A few coal layers are possible in the permafrost. The 2D pre-stack time migrated line, tying the Cirque wells (Fig 7a, b), shows a high amplitude reflector at the base of permafrost and bounded by faults. We suspect that this well blow out is possibly due to shallow gas. ~ There are some high-amplitude reflectors that occur on our existing poor quality 2D seismic data around the Mastodon 6-3-9 well close to base permafrost. This may suggest a shallow gas hazards (hydrate?) around 180 ~- Although there is no major fault cutting through the proposed well path, there may be other shallow faults around 152 ms (SW of well) (Fig 8). There also appears to be a stratigraphic pinch-out and amplitude dimming which may indicate the possibility of gas near the Prince Creek formation. 7 24/08 F~I:I~':ka7 [$~"iptllP~~S 30 of 36 Fig7a: Cirque -Hot Ice tie line .... .. :... .am 4 ~3~' AA."4i T ',' '~~WIY~- s~ - ~ ~ _.~+%rmiw L r .. _. i ~r ' v ... -Y~r ~ ~ w ~~:, , ~ ~ ~: it';:; MM7~ x. .fy L ~.a w~w ~ .»k: Sv.-w „ .. ~M s '~' ~ "'s , .~ i K«. ~ • s . . i ~:. y 3 ' rw. . r a ~ » ~ h . MA F . ~ '~. ~ H . . . 7 z a. .. a ~ x »~ _.. . _ .. _ _ N y i:. ~. ' ~ _ r .:. M ' .:... f. w . ~.. i~. Ra +wnr ~[. ni ~ v wy >. ~ ~. ~ ../ x}~ s V.~yi, ~. .~ r _ ~ ._ ~~~ ~ •~'!1l""i4w~ ... ~ ~ '. «-.. .. ~ ~'Y ~ 9.:.. ... > y .N . ~i it r .: ~ _:.; i~µ. ~t^~.~. ~ ' n. ~a. nl • 24/08 31 of 36 The present 2D seismic data quality is poor. In particular, the Central Depth Points (CDPs), which are on the Mastodon 6-3-9 well seismic line, are coincident with ice lakes at the time the data was acquired (although not on the well location). Ice lakes pose a significant challenge when processing and interpreting seismic data because of statics issues which diminish the image quality and frequencies in that section (Fig 8). With the current state of the seismic, it is difficult to truly asses the potential for shallow hazards. _ _.__ Y .. • ~ ' i~~iSial i~~~' , , [~:e Lake f~c L~ikc y~ ~ ~ ~. .~ ~ 1 . .' t q~ ~ y r` .1 « rwa Fr^'4Qy~ '•~fz t ` ~` ati~ to ~. ~ ,~; t~. ~a ,4 t « 4 ~ ~ . .~. ...,~ ~, .:..mar. j ~ ...- ~~y ~, "+w - '..' ».t~ ,~'n '4 +r *„ ~... ~, , .. ~.,. . •• x..lY « v... ~. '.:. f0.... • .. .~ - ywy - . ~ ,^.. - y - r .. ~~ -y •..._ ..._. ...r! •^~., :Yr:; /.X;', !u.. ~ .~....: '~.3i~"~y Lr.w-.-..._ mRaMr):n:_ Fig 8: Pre-stack time migrated 2D White Hills 2D seismic line (wg91-30); dip direction The newly acquired (2007) 2D seismic, acquired to tie the wells and help identify possible shallow hazards, is anticipated to be completed by late summer 2007. The expectation is to review the data as soon as it is completed for any shallow hazards which may not be identifiable on the current pre-stack time migrated dataset. ~ ~ 4/08 GEO-PRESSURE /VELOCITY ANALYSIS 32 of 36 Checkshot and VSP data is sparse in the White Hills area. However, there is sufficient data to generate a velocity field (Fig. 8) across the region which indicates that we should not encounter any velocity anomalies. ,% The permafrost zone has higher velocities as expected and the transition beneath the frozen, lower velocity base is quite distinctive. CHECKSHaTS Tune vs Depth :I ^' base pcrurifrust t: -- - _ _- - _ _- ^ m ~ >. _~ ~~ ©$E7~}I t~l 1}870W T-D d3fdJJ3'E ^ ^ Fig. 8 Checkshot and VSP Velocity Field across the White Hills and Surrounding Areas The Wolfbutton 25-6-9 is the most proximal checkshot to the proposed Mastodon 6-3-9 well. We expect similar velocities as shown in (Fig 9) on the Interval Velocity (Vint) vs Depth plot; Interval Transit Time (ITT) vs Depth. The plots show the expected faster velocities through permafrost and slower velocities through the zone of interest. From the velocity analysis, we expect a normally pressured regime through the Prince Creek, Ugnu, ~ West Sak formations, and Colville zone. ~~~< -~~t __ ~tFCFkf2e-~. 10 ~ ~ 24/08 33 of 36 >,~~,e a" ~ ~ ~ ~ Alaska ~'tsc~rc~s ~:. MUD WEIGHT $ SHALE RESISTIVITY ANALYSIS 3 key wells which delineate the White Hills area and Smilodon prospect are the Malguk #1, Wolfbutton 25-6-9, and Ruby State #1. These wells were used in addition to the checkshot and VSP data to examine the possibility of pressure and velocity anomalies. In Fig (10) Mud Weight (MW) in ppg were plotted vs depth for the 3 wells. The graphs indicate that drilling was balanced through our zone of interest where MW increased with depth. The Malguk well shows an anomaly at 2977 ft which coincides with top of the west sak pay interval; the well was cased at this point. ~ -- 11 Fig 9. Wolfbutton 25-6-9: Time vs Depth, Vint vs Depth, ITT vs Depth ! • X4/08 Malguk #1 Rshale ohm-m 100 10 1 __ __ 0 8.8 9 9.2 x ~~ ~ 2000 \~\\ I~>li ~'-~; - --- ____ _ _ __ _II 4000 9.4 9.6 9.8 10 10.2 Mudweight ppg LL t 6000 m 0 8000 10000 12000 10.4 Mudweight and Shale Resistivity versus Measured Depth plot for the Malguk #1 well. Mudweights were increased from 1200' to casing point due to oil and gas shows in the mudstream. Note that the shale resistivity trend indicates a normally pressured section down to approximately 10,000 feet, where a hioher pressured regime is indicated. 34 of 36 12 • i ~j4~Og 35 of 36 As...;k.i tzs~~sours Wolfbutton #25-6-9 '~ Rshale ohm-m 100.00 10.00 1.00 0.00 I~~li \1\\ 2000.00 4000.00 6000.00 '~ 8000.00 10000.00 12000.00 j 8.00 8.50 9.00 9.50 10.00 10.50 11.00 ~ Mudweight ppg Mudweight and Shale Resistivity versus Measured Depth plot for the Wolfbutton #25-6-9 well. The shale resistivity trend indicates a normally pressured section at least down to 8,000 feet. 13 • t ~~ 4/08 36 of 36 SUMMARY In conclusion, we do not expect any shallow hazard in the Mastodon well based on our current dataset. The interpretation of our current 2D seismic and evaluation of offset mudweight well data do not highlight any ~ potential problems. Prepared by: Dave Buthman Geologist /Technical Team Lead Alaska New Ventures Team MidContinent /Alaska BU (281)561-3401 buthbdb@chevron.com Monique Velasquez Sr. Exploration Geophysicist Alaska New Ventures Team MidContinent /Alaska BU (281)561-4958 moniauevelasaue2~a chevron.com 14 Page 1 of 1 • Davies, Stephen F (DOA) From: Buthman, David B [buthbdbc~Dchevron.com] Sent: Thursday, February 07, 2008 2:05 PM To: Davies, Stephen F (DOA) Cc: Velasquez, Monique (MVelasquez) (MoniqueVelasquez) Subject: CONFIDENTIAL DATA: Mastodon 6-3-9 Shallow Hazard Report Attachments: State.pdf Hi Steve, Monique generated the attached time seismic lines illustrating the new data we acquired at the proposed Mastodon 6-3-9 well. The Base of Permafrost at 300 ms, or approximately 1200 feet depth, shows a pervasive amplitude that extends far some distance and does not appear to conform to structure, nor does it appear to either'flatten out' ar grade downdip into a water leg, as was indicated at the analogue hazard the Cirque 1 well. We estimate that this shallow amplitude beneath Mastodon occurs at the base of permafrost, and probably consists of water-saturated gravels. ~ Although we recognize the possibility of a permafrost hazard near the base of permafrost at the Mastodon well, we do not consider it a probability due to reasons specified above. Please consider the attached seismic data as CONFIDENTIAL. Rgds, _ ~~ Dave f ,/ ~~J ~/ From: Davies, Stephen F (DOA) [mailto:steve.davies@alaska.gov] Sent: Wednesday, February 06, 2008 5:13 PM To: Buthman, David B Subject: Mastodon 6-3-9 Shallow Hazards David, Page 7 of the Shallow Hazards Analysis for Mastodon 6-3-9 notes the presence of some high-amplitude reflectors on older, poor-quality 2D seismic data near the base of permafrost. These suggest possible shallow gas or gas hydrate hazards. Has the 2007 2D seismic data been reviewed for shallow hazards at the Mastodon 6-3-9 location? If so, could you please summarize the results of the review? Thanks for your help. Steve Davies Sr. Petroleum Geologist Alaska Oil and Gas Conservation Commission Telephone: (907} 793-1224 Fax: (907) 276-7542 New Email Address: stev_e.davies alaska~gov 2/7/2008 ~ ~ TRANSMITTAL LETTER CHECKLIST WELL NAME ~~'~~ S ~~~~-... ~'"3~~ PTD# ~-~U °~ ~ ~~ r-.-- Development Service Exploratory Stratigraphic Test Non-Conventional Well FIELD: _ ~~ Ql~Oc-c,~~ t~ POOL: '~)~ ~ ~---- Circle Appropriate Letter /Paragraphs to be Included in Transmittal Letter CHECK ADD-ONS WHAT (OPTIONS) TEXT FOR APPROVAL LETTER APPLIES MULTI LATERAL The permit is for a new wellbore segment of existing well (If last two digits in permit No. , API No. 50- AP1 number - are between 60-69) Production should continue to be reported as a function of the . original API number stated above. PILOT HOLE In accordance with 20 AAC 25.005(f), all records, data and logs acquired for the pilot hole must be clearly differentiated in both well name ( PH) and API number (50- - -_) from records, data and logs acquired for well SPACING The permit is approved subject to full compliance with 20 AAC EXCEPTION 25.055. Approval to perforate and produce /inject is contingent upon issuance of a conservation order approving a spacing exception. assumes the liability of any protest to the spacing exception that may occur. DRY DITCH SAMPLE All dry ditch sample sets submitted to the Commission must be in no greater than 30' sample intervals from below the permafrost or from where sam pies are first caught and 10 sample intervals throw h tar et zones. Non-Conventional Well please note the following special condition of this permit: production or production testing of coal bed methane is not allowed for (name of welt) until after (Companv Namel has designed and implemented a water well testing program to provide baseline data on water quality and quantity. _(Companv Name) must contact the Commission to obtain advance approval of such water well testing ro ram. Rev: 1/I 1/2008 WELL PERIMtT GkiECKlISI' Field & Pool Well Name: MASTODON 8-3-9 Program EXP Well bore sag ^ PTD#:2080190 Compan UNION OIL COOF CALIFORNIA Initial ClasslType EXP ! PEND GeoArea 885 Unit OnlOif Shore ~ AnnularDisposal ^ Administration f Pe[mitfesatkaChed-- ------------ -- -- -- - ---- ~--- - - --- --- - --- ---- ---- -- ---- - -- 2 Lease numberappropriate---- -- --- - - -- - -- ------ --Yes --- -- - -- - -- - --- - -- -- ---- ------ ------------------ 3 Unique wellnam_eandnumbe[___________________________ ___________Yes----- --------- ------------------ -- ------------------------------------------ 4 WQfUocatedinadefinedp9ol-------------------------- ------------iy°------- ----- -ExplcratQrywell,------------------------------ ------------------------- 5 Well located proper distancef[omdrillingunitbcundary_-___--_.__- -______-_-Yes------ ------------------------------------ - --- -- 6 Well locatedproperdistanceftomQtherwells___________________ __________Yes_____ --- --- _Malguk.f-is3-9,,4_mileslatheNE-_-___--__--_-__--__-----_-- - ------------- 7 Suffioientacreage_availableindri0ingunR______--_._____--__ _-___-___Yes------ -------------------------------_--- --------------------------- 8 Itdeviated,is-vreubareplat_inclu_dad------------------------ ----------- NA----- ------ -YerticalwBll-------------- ----------------------------------------- 9 Opetatoron~Caffectedpargr---------------__--__--_____ .----___---Yes-_-__- ------ -Unocal is 100%_owner, landowner is Siate-____---_---__-------__---_------_---_ - 10 Opa[atothas-appr9prlatebOndnforos - -- --- -- -- -------Y~----- --- - -- - -- -- ---- --- -- -- - - - -- -- 11 Perm_itr~nbe~ssuedwitboutconsenaiionorder___________-__ __________Y®s_____ --- _____________--_----__---__-_-__--_----_ -- ------------- Appr Data 12 Permitcanbeissuedwiihoutadministtative_approval-------------- ---------_Yes------ --- -------.------------------------------------ - ----- -- -_-- SFD 21612008 13 Can permit be approved before l5-day_wait____-----___--- ----- -----Yes------ -------------------------------------- - - - - --- ---- --- 14 .Well IQCated wltttin area artd strata authorized by-Injection 9rde[ # (putlp# in -comments)_(For- NA- - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ 15 AJlwells.Nithin1(4-mileareeofrsvisYUidantifiod(F9tsetvlcewell9nly)_--- --__--_--- NA------- ------------------------------- ------------------------------- 16 PrB•produr~edinjector.duratianofpreproductiontessthan3monihs-(For service well oNy)_._NA_____ ------- _____------------------__------_-__-___ _ -- _ -- _ 17 Nonaonven,gas_COnforms14AS31,050$0(y1.A),(1.2.A-D)-- ---- -- - --- -NA -- -- ---_ -- - -- -- ---- -- ---- --- - - ------ ---~ --- -- --- Engineering 18 Conductor string-prcvlded_________________-___-___-_ ..-______Yas----- ---------___--- ----------------------------------------------- 19 Surface casingproteots all known USDWS _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _NA_ - _ _ _ _ _ ------- _ No subsurface water souroes_in area._ Surface casing X700' below-permafrost_ - - - - - _ - - - - - - _ - - _ - _ 20 CMT-voladequate_tocitculateon_conduct9[Bsulfcsg------------- ---------'_Yes----- ----------------------------------------- -- - -- -------- - 21 CMT-voladequate_tofie•in long string tosurfs~-__--__-__--___ __.-__-_--Yes------ - ----- ------------------------------------------ ---------------- 22 CMT.wiilcoverallkoawn_productivebor~orts___-__-___-------- -__-_-----Yes______ ----------- ____________--_---_---_--_---_----_--_-_-- _ -- ---- 23 Casing designs adequatef9tG,T8_&permafrost--------------- ----- -----Yes_----- _ ---- ------------------------------------------- - - - - 24 Adequate tankage_or reserve pit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Yes . _ _ _ _ ------------ _ Rig equipped with steel pits, No reserve pif planned._ Annuls[ disposal in.Smilodon.$-1-9 gr hauling planned, _ _ _ 25 If_are-d[ill~has-a10_-403 foraband4nmentbeenapprovsd----------- ----------- NA-----_- --------------------------------------------- -- - -- - - 26 Adaquata-weilboreseparadon-proposed---------------------- -----------Yes------ ---- -- -Nearestwell(Malgukl181-Q16U~3.25miles distant.-------------------------------- ---- 27 If-diverterrequUed, dceaitmeetregulations_ _ . - _ - - - _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ Yes _ _ _ _ _ _ 12.114"_hnle_planned, Rigequippedwith 12"_div_eCtertioe.-This_has been approvedp[eviously. - - _ - - - - _ - _ Appr Date 28 Draping fluid program sahematic_&equip list adequate_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Yes _ _ _ _ _ _ Maximum expected formation pressure 8,4-EMW._ MW planned up 10 9,3-ppg o[ as_needed.- _ _ _ _ - _ _ _ ----- TEM 2!1112008 29 BOPIS,_dotheymeetregulation- - - - -- -- ---- ----Yes ----- - ---- -------- ---- ---- 30 BOPE_preasratingapprop[iate;lBStto_(putpsigincomments)--------- ------- ---Yes--.--- -------- -- - --- --- --- -MASP1560_psi.z500_psi@OPtest-planned,_--------------------------------_----- ~/ 31 Choke-manifoldoomplies wlAPl_RP-53(May84)----------------- ---------Yes------ ------------------------------------------- -- - --- 32 _lNorkluihoGCU[with9uk_oparatlonshutdQwn-------------------- ----------Yes-.---- ----- ----- ----------- -- --- -- -- --- --- - --- -- 33 Is presence of H2S gas probable _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Na_ _ - - - _ - --- - H2S has not been reported in offset wells, _Mud should preclude H2S oo rig. -Rig has sensors and alarms, _ _ _ _ 34 Mechanical_conditlon otweps wphin ApR verified fFOtservice well only) - - - - - - - - - - - - - - -KA - - - - _ - - . - - - - - - - - - - - - , _ Geology 35 Permitoan 1>Q Issued wlohydrogen-sulfide measures - _ _ _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _iye_ _ - _ _ _ _ Not expected in-1Nesf Sak. Drilling fluid program noses that scavenger chemicals should-be.on location, - - - _ 36 Data-presented on potsmial overpressurezones _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Yes _ _ - _ _ _ _ ixpected pressuregradientis 8.3 ppg.. _ _ _ _ . _ - _ _ Appr Date 37 Seismic analysis Qfshall9w gas_zones_ _ _ _ _ _ _ _ _ _ _ _ _ _ . - - - - - - - - , - , - . - - - - -Yes - - - - - - - Hydrates_possibl@ at_the_base ofa~enriafrost.- - - - - SFD 2RI2008 38 Seabed conditionsurvey_(ifoffshore)---------------------- -----------NA______ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ____________--- ----------------------------------------- 39 Contact namelphone forweek~r_progress repods_[exploraiory only)- - - _ _ - _ - -Yes _ _ _ _ _ ----------- _ Tim_Brandenburg 907-2637812- - - - - - - - - - - - - - - - - - - - - - - - - - - - - Geologic Engineering P ' Commissionee Date; Com fissions : Date C miss' ~ 2~ ~(~ Date ~~ ~;~~ ~ !~. ~` p U ref U Well History File APPENDIX Information of detailed nature that is not particularly germane to the Well Permitting Process but is part of the history file. To improve the readability of the Well Nistory file and to simplify finding information, information of this nature is accumulated at the end of the file under APPENDIX. No special efifort has been made to chronologically organize this category of information. CD-Rom Listing April, 2008 Client: Union Oil Company of California Well: Mastodon 6-3-9 Location: North Slope, Alaska Zero Offset VSP SEGY Files• # File Name # of Tr. Description 1 rawl.sgy 5400 Rawl Data (source 1) 2 raw2.sgy 3352 Rawl Data (source 2) 3 ravel-sum3osgy 183 Stacked Data (source 1) 4 raw2-sum3c.sgy 120 Stacked Data (source 2) 5 geom-all.sgy 93 Survey Geometry (source 1 & 2) 6 velraw.sgy 93 Input for velocity analysis 7 velout.sgy 57 Velocity analysis data 8 tgainl.8.sgy 93 VSP Levels, Total Wavefield with Tgain (T**1.8) 9 tg-mut-pk.sgy 91 Total Wavefield after removing bad traces & tube wave 10 dn13-sft200.sgy 91 Downwaves after Separation 11 dcdn600-n8.sgy 91 Deconvolved Downgoing Waves 12 up13-fk-dl l.sgy 91 Upgoing Waves after Separation 13 up2way.sgy 91 Upgoing Waves at Two-way Time 14 up2way-d3.sgy 91 Enhanced Upgoing Waves 15 dcup600-n8.sgy 91 Upwaves after Deconvolution 16 dcup600-n8-d3.sgy 91 Enhanced Upgoing Wavefield after Deconvolution 17 mut.sgy 91 Designed Corridor 18 stk80.sgy 16 Corridor Stack 10(18)-80(36) Hz (db/Oct) zero phase bandpass filter 19 stk60.sgy 16 Corridor Stack 10(18)-60(36) Hz (db/Oct) zero phase bandpass filter 20 stk50.sgy 16 Corridor Stack 10(18)-50(36) Hz (db/Oct) zero phase bandpass filter 21 stk40.sgy 16 Corridor Stack 10(18)-40(36) Hz (db/Oct) zero phase bandpass filter 22 stk30.sgy 16 Corridor Stack 10(18)-30(36) Hz (db/Oct) zero phase bandpass filter 23 stk25.sgy 16 Corridor Stack 10(18)-25(36) Hz (db/Oct) zero phase bandpass filter 24 SEGY-Format.doc CGM Files• # File Name Description 1 fig2.cgm Survey Configuration (source 1 & 2 data) 2 fig2a.cgm Survey Configuration (source 1 data) 3 fig2b.cgm Survey Configuration (source 2 data) 4 fig3.cgm Directional Survey Display 5 fig4.cgm F-K Analysis for Raw Total Wavefield 6 fig4a.cgm F-K Analysis for Raw Total Wavefield (after removing bad traces & mut noise part) 7 en3.cgm Enclosure 3: Velocity Analysis Plot (500 ft/in) 8 en4-Sin.cgm Enclosure 4: VSP Processing Flow Display (5 in/sec) 9 en4-l0in.cgm Enclosure 4A: VSP Processing Flow Display (10 in/sec) 10 ens-Sin.cgm Enclosure 5: Corridor Stack Display (5 in/sec) 11 ens-l0in.cgm Enclosure SA: Corridor Stack Display (10 in/sec) 12 en6.cgm Enclosure 6: 3-Components Data Display (5 in/sec) vsfusion ~ ti`~ ~ 1 of 2 •~~ ~~ PDF Files: # _Fle Name Description 1 fig2.cgm.pdf Survey Configuration (source 1 & 2 data) 2 fig2a.cgm.pdf Survey Configuration (source 1 data) 3 fig2b.cgm.pdf Survey Configuration (source 2 data) 4 fig3.cgm.pdf Directional Survey Display 5 fig4.cgm.pdf F-K Analysis for Raw Total Wavefield 6 fig4a.cgm.pdf F-K Analysis for Raw Total Wavefield (after removing bad traces & mut noise part) 7 en3.cgm.pdf Enclosure 3: Velocity Analysis Plot (500 ft/in) 8 en4-Sin.cgm.pdf Enclosure 4: VSP Processing Flow Display (5 in/sec) 9 en4-l0in.cgm.pdf Enclosure 4A: VSP Processing Flow Display (l0 in/sec) 10 ens-Sin.cgm.pdf Enclosure 5: Corridor Stack Display (5 in/sec) 11 ens-l0in.cgm.pdf Enclosure SA: Corridor Stack Display (10 in/sec) 12 en6.cgm.pdf Enclosure 6: 3-Components Data Display (5 in/sec) 13 enl-field-OB-report.pdf Field Engineer's Report Resort: # File Name Description union10369.doc ZVSP Survey Report, Microsoft Word Format en2-Directional.xls Deviation Survey Report Table Files• # File Name Description 1 lOft.txt Interpolated Every 10 ft Below Datum 2 2ms.txt Interpolated Every 2 ms Below Datum 3 geom.txt Sources-Reverse Geometry Table 4 time.txt Time-Depth Information Table 5 velo.txt Velocity Table 6 I-T-D.txt Interpolated Time-Depth Information Table, Every 1 ms, Two way time below datum 7 I-D-T.txt Interpolated Depth-Time Information Table, Every 10 ft Below Datum 8 depth-time.txt Depth-Time Information Table 9 depth-time.xls Depth-Time Information Table, Microsoft Excel Format 10 devi.txt Directional Survey Table vsfusion 2of2 • ZERO OFFSET VSP REPORT FOR Union Oil Company of California Final Report Zhiqiang Luo Nicholas Dray April 2008 VSFusion 16430 Park Ten Place, Houston, Texas, 77084, United States. Tel: +1-281-646-2700, Fax: +1-281-646-2799 vsfusion A Baker Hughes - CGGVerims Campairy Well: Mastodon 6-3-9 Field: White Hills Location: North Slope, Alaska Report Status: Authors: Reviewer: Date: • • In the processing and interpretation of the data, VSFusion employees have relied on experience and have exercised their best judgment. However, since all interpretations are opinions based on inferences from acoustical or other measurements, we cannot and we do not guarantee the accuracy or the correctness of any interpretations. As such, we shall not be liable for any loss, damages or expenses resulting from reliance on such interpretation. r ~ ~J CONTENTS • 1. ACQUISITION AND PROCESSING 1.1 Introduction ............................................................................................................1 1.2 Data Acquisition .....................................................................................................2 1.3 Data Processing 1.3.1 Edit and Stack Raw Data ...........................................................................3 1.3.2 Velocity Survey Computations ....................................................................3 1.3.3 VSP Processing ........................................................................................:3 1.4 Acquisition Parameters ..........................................................................................6 2. VELOCITY SURVEY COMPUTATIONS 2.1 Velocity Survey ......................................................................................................7 2.2 Directional Survey Table ........................................................................................8 2.3 Source/ Receiver Geometry Table .........................................................................9 • 2.4 Time/ Depth Information Table ...........................................................11 ................. . 2.5 Velocity Table .......................................................................................................13 3. INTERPOLATED TABLES 3.1 .Linear Depth /Time Listing (Listed every 10 ft) ......................................................16 3.2 Linear Time /Depth Listing (Listed every 2 msec) .................................................25 3.3 Time /Depth Abbreviated Listing (Listed every 1 msec) .........................................34 3.4 Depth /Time Abbreviated Listing (Listed every 10 ft) .............................................36 3.5 Depth /Time Information Table .............................................................................37 4. LIST OF FIGURES Figure 1: Acquisition Parameters ..............................................................................39 Figure 2: Survey Configuration ..................................................................................40 g Y g ( ) .................................................................41 • Fi ure 2A: Sunre Confi uration source 1 Figure 2B: Survey Configuration (source 2) .................................................................42 Figure 3: Directional Survey Display ..........................................................................43 Figure 4: F-K Analysis for Raw Total Wavefield ........................................................44 • Figure 4A: F-K Analysis for Total Wavefield (after edited data) ...................................45 5. LIST OF ENCLOSURES Enclosure 1: Field Engineer's Report Enclosure 2: Directional Survey Report Enclosure 3: Velocity Analysis Plot (500 ft/in) Enclosure 4: VSP Processing Flow Display (5 in/sec, 1000 ft/in) Enclosure 4A: VSP Processing Flow Display (10 in/sec, 1000 ft/in) Enclosure 5: Corridor Stack Display (5 in/sec) Enclosure 5A: Corridor Stack Display (10 in/sec) Enclosure 6: 3-Component Data Display (5 in/sec) • Union Oil Company of Calif rnia Well: Mastodon 6-3-9 1 ACQUISTION AND PROCESSING 1.1 INTRODUCTION Baker Atlas conducted a Zero Offset VSP Survey for Union Oil Company of California in their Mastodon 6-3-9 well, located in the White Hills field, North Slope, Alaska. The objectives of the VSP survey were to: • Provide time-depth information Generate a VSP corridor stack At the time of the survey, the well had been drilled to a depth of 4,845 ft and cased to a depth of 1,872 ft. All measured depths are referenced to the Kelly Bushing (KB.) elevation of 380.5 ft above MSL. The ground elevation at the wellhead was 355.8 ft above mean sea level. The well had a maximum deviation of 2.25 degrees at 4,770 ft. KB. A well deviation surrey report was used to correct the wireline measured depths to true vertical depth. A copy of the deviation survey is included as Enclosure 2 in the back of this report. The display of the deviation survey is included (Figure 3). Two source locations were used. • Table 1 is a summary of the survey acquisition information. Table 1: Survey information Source Survey Type Depth Range from KB # Levels # of files Tool 1 VSP 1,800 - 4,800 ft 61 675 6204 XA 2 VSP 250 - 4,800 ft 38 419 6204 XA • 1 of 45 VSfL1S101'1 Union Oil Company of California Well• Mastodon 6-3-9 1.2 DATA ACQUISITION The survey began at 01:28 hrs on March 21, 2008 and was finished at 08:55 hrs on March 21, • 2008. The source used for the zero offset VSP surrey was two LRS-315 vibrators. Table 2 is a summary of the source location information for the survey. The source was moved closer to the wellhead in order to acquire the shallower level. The elevation of the source was 355.8 ft above MSL. A true reference signal from the vibrator electronics was used for timing purposes. A 6- second, linear upsweep, with a 6 to 100 Hz frequency range, was used for the acquisition. A single level 3-component 6204 XA downhole receiver tool was used to record the survey. At the start of the survey, the wireline depth sensor was zeroed at the KB elevation and the tool was lowered down the well. As the tool was lowered down the well, it was stopped at a number of depths to check the equipment performance and depth control before reaching a maximum depth of 4,800 ft. KB (TD). VSP recording then proceeded as the geophone was raised to the shallowest station depth of 250 ft. KB. Data was gathered at 93 downhole receiver stations. There were a total of 1,094 files acquired during the survey. Correlated data was recorded for 4 seconds using one millisecond sampling rate. The zero offset VSP survey configuration is shown on Figure 2. Enclosure 1 contains the Field Engineer's report for the survey. Table 2 is a summary of the source information. • Table 2: Source information Source # Date & Time (In) Date & Time (Out) Depth Range from KB (ft) # of Level # of Files Source Distance from Wellhead Source Azimuth from Wellhead Source Elevation 1 3/21 /08 01:28 3/21 /08 06:15 1, 800 - 4, 800 61 675 300 ft 230° 355.8 ft 2 3/21 /08 06:34 3/21 /08 08:55 250 - 4, 800 38 419 250 ft 232° 355.8 ft For depth correlation, agamma-ray wireline tool was placed at the top of the 3-component receiver tool to check on the geophone depth locations. As the receiver descends into the borehole, measurements are taken periodically using the gamma ray tool. Readings from the original wireline gamma ray and the receiver gamma ray are correlated. If a difference between the two gamma ray readings is found, the geophone tool depth is corrected to the original gamma-ray log depth. This ensures that the borehole seismic data will depth tie the wireline logs. A depth correlation was made at the following locations: 1,350 ft, adjusted depth 24 ft 1,460 ft, adjusted depth 5 ft • a of as ysfusion Union Oil Company of California Well: Mastodon 6-3-9 1.3 DATA PROCESSING • 1.3.1- Edit and Stack Raw Data The three component digital data were reformatted and displayed. The first arrival time for the autocorrelation pulse for each record was time picked. Each downhole geophone trace was subsequently shifted by the time value of its corresponding autocorrelation pulse. This shift will reference the downhole geophone traces to the elevation of the source. The downhole geophone traces for each depth level were edited as necessary and then stacked using a median summation algorithm. First arrival times were picked for each stacked trace. Enclosure 6 displays the stacked raw data (3 components) for the VSP surrey. The vertical component was used for VSP Processing and velocity analysis. The accuracy of the depth sensor was checked by comparing the first-arrival times of the same levels occupied during the down and up runs of the tool. The time agreement was found to be acceptable. The data occupied during the down trip of the tool was not used in any of the computations. 1.3.2- Velocity Survey Computations The observed first arrival times at each depth were converted to vertical times and then • referenced to the seismic reference datum (SRD) of sea level using a correction velocity of 13,000 ft/sec. These time-depth pairs were then used as the input data for the velocity survey computations. The computed average, RMS, and interval velocities are listed in Section 2 and displayed in Enclosure 3. The geophone levels not used in the computations are denoted on the time /depth listing by an asterisk and on the display by a small red box on the average/interval velocity track. 1.3.3- ZVSP Processing The ZVSP processing flow is displayed at 5 in/sec in Enclosure 4 and 10 in/sec in Enclosure 4A. Spherical Divergence Correction A compensation for amplitude decay due to spherical divergence was applied to the stacked vertical component data using an exponential gain function of T'`*1.8 (where T is the recorded time). High amplitude cyclic noise is present on much of the data. Figure 4 shows this to be centered around 59 hz. The noise was suppressed using a 59 hz notch filter. The remaining noise on the shallowest traces was muted. The coherent part of the tube wave was attenuated using a dipping median filter but some residual noise remains on some traces on panel 2 of Enclosure 4. • A display of the gained VSP total wavefield is shown in panel 1 of Enclosure 4. 3 of 45 VSfUS10T1 Union Oil Company of California Well: Mastodon 6-3-9 An f-k spectral analysis display of the gained VSP total wavefield is shown as Figure 4A. This shows the bandwidth of the upgoing wavefield to extend beyond 80 Hz. Wavefield Separation • Before wavefield separation, the shallow, coarsely spaced receivers are removed. This is done to ensure that the data does not become spatially aliased during the separation process. The upcoming and downgoing wavefields were separated using a median filter. The VSP total wavefield was time aligned using the direct arrival time of each trace. This time shift will align the compressional P downgoing wavefield. A constant 200 ms shift is then applied to ensure that no data is lost when the time shifts are removed. A 13-trace median filter was applied to the aligned VSP total wavefield. This filter will pass the downgoing wavefield. The downgoing wavefield is then arithmetically subtracted from the total wavefield. This subtracted dataset will contain the upcoming P waves, as well as any residual wave energy and noise. A zero phase 10(18)-80(36) Hz (dB/Oct) Bandpass filter was applied to the downgoing and residual upcoming wavefield. The downgoing wavefield after wavefield separation is shown in panel 3 of Enclosure 4. The residual upcoming wavefield after wavefield separation is shown in pane/ 5 Enclosure 4. Residual Upcoming Wavefield Enhancement The residual upcoming wavefield is time aligned to two-way time. A 3-trace dip median filter was • applied to the upcoming wavefield to remove unwanted wave modes and unwanted residual energy left in the dataset after the wavefield separation. A zero phase 10(18)-80(36) Hz (dB/Oct) Bandpass filter was applied to the enhanced upcoming wavefield. The upcoming wavefield is shown in panel 7of Enclosure 4. VSP Downwave Deconvolution VSP Downwave deconvolution is a deterministic process. Because the downgoing wavetrain can be isolated from the VSP dataset, the reflectivity response of the earth at the well location is known for the VSP source wavelet. The downgoing VSP wavetrain contains the direct arrival source wavelet followed by multiple arrivals. Every event that follows the direct arrival is a downgoing multiple reflection. The deconvolution process will analyze the downgoing wavetrain and compute an operator that will collapse a user specified portion of the downgoing wavetrain to a unit spike. This operator is then applied to the upcoming waves. The VSP downwave deconvolution will shape the input source wavelet to zero phase and collapse upcoming multiple reflections generated above the depth of the deepest receiver. A 600 ms operator was used to collapse the downgoing wavetrain to a unit spike. A zero phase 10(18)-80(36) Hz (dB/Oct) Bandpass filter was applied to the deconvolved data. The deconvolved downgoing and upcoming wavefields are shown in panel 4 and panel 8 of • Enclosure 4. 4 of 45 VSfUS10I1 Union Oil Compan,Lof California Well: Mastodon 6-3-9 Datum Correction • The upcoming wavefield data was time corrected to seismic datum using a correctional velocity A 3-trace dip median filter is applied to the datum corrected upcoming waves. This filter will remove random high frequency noise generated by the deconvolution process. A zero phase 10(18)-80(36) Hz (dB/Oct) Bandpass filter was applied to the median filtered upcoming wavefield. The post deconvolution median filtered upcoming wavefield is shown in panel 9 of Enclosure 4. Corridor Mute and Sfack of 13,000 ft/sec. Post Deconvolution Median Filter A narrow time window close to the first arrival time on each trace was carefully chosen. The time window is designed to include only traces whose reflection character is similar enough to be included in the stack and is kept relatively short to exclude long travel path reflections. The data that lies outside of the stacking corridor is muted. The display of the corridor window is shown in panel 10 of Enclosure 4. The data in this time window is then stacked to generate a single VSP corridor stack trace. This stacked trace is repeated 16 times for visual clarity and represents the seismic response at the wellbore. A zero phase 10(18)-80(36) Hz (d6/Oct) Bandpass filter was applied to the corridor stacked • data. The corridor stack, normal and reverse polarity, is shown in panel 11 and panel 12 of Enclosure 4. Bandpass filters of 10(18)-80(36), 10(18)-60(36), 10(18)-50(36), 10(18)-40(36), 10(18)-30(36), and 10(18)-25(36) Hz (dB/Oct) were applied to the corridor stack data. Displays of the corridor stacks for both normal and reversed polarities at six frequency bands are included on Enclosure 5 at 5 in/sec and Enclosure 5A at 10 in/sec (Corridor Stack Display). Polarity For synthetic seismograms and VSP data after deconvolution, normal polarity shows a positive reflection coefficient as a peak. This corresponds to SEG convention. 5 of 45 VSfLlS10I1 Union Oil Compan~of California Well: Mastodon 6-3-9 1.4 ACQUISITION PARAMETERS Client: Well: Field: Location: Survey Type: Date Survey Completed: Wireline Contractor: Casing: Union Oil Company of California Mastodon 6-3-9 White Hills North Slope, Alaska Zero Offset VSP 21 March, 2008 Baker Atlas 9.625" from 0 to 1,872 ft MDKB • Total Depth: Elevations: Kelly Bushing Elevation: Ground Elevation at Wellhead: Seismic Datum: Recording System: Type: Format: Record Length: Sample Rate: Geophone Geophone Type: Total Number of Levels Occupied Shallowest Geophone Level: Deepest Geophone Level: Quality of Geophone Breaks: Source: Type: Source Elevation: Source Location: Sweep: Sweep Length: Listen Length: Personnel: Seismic Observer: Client Representative: 4,845 ft MDKB 380.5 ft above sea level 355.8 ft above mean sea level mean sea level SLS IV data 4 seconds 1 msec 6204 XA, 3 Component single level 93 levels 250 ft (K.B.) 4,800 ft (K.B.) Casing ringing at shallow section LRS-315 vibrator 355.8 feet above mean sea level see below table 3 6-100 Hz 6 seconds 4 Seconds R. Kleb Monique Velasquez Table 3 is a summary of the survey acquisition information. Table 3: Survev information Source # Survey T e Depth Range from KB (ft) # of Level # of Files Source Distance from Wellhead Source Azimuth from Wellhead Source Elevation Tool 1 ZVSP 1,800 - 4,800 61 675 300 ft 230° 355.8 ft 6204 XA 2 ZVSP 250 - 4,800 38 419 250 ft 232° 355.8 ft 6204 XA • • 6 of 45 VSfLiS10I1 Union Oil Compan~of California Well.• Mastodon 6-3-9 • 2 VELOCITY SURVEY COMPUTATIONS 2.1 VELOCITY SURVEY CLIENT WELL AREA CONTRACTOR SURVEY DATE SURVEY UNITS RCVR REF. ELEVATION DATUM ELEVATION KB ELEVATION WELL GROUND ELEVATION DATUM CORRECT. VELOCITY SOURCE TYPE GEOPHONE TYPE SAMPLE RATE WELL CASING UNION OIL COMPANY OF CALIFORNIA MASTODON 6-3-9 NORTH SLOPE, ALASKA BAKER HUGHES - BAKER ATLAS 21 Mar 08 FT 380.50 FT ABOVE SEA LEVEL 355.80 FT ABOVE SEA LEVEL 380.50 FT ABOVE SEA LEVEL 355.80 FT ABOVE SEA LEVEL 13000.0 FT/SEC VIBROSEIS 6204 XA 1.00 MSEC 9.625" FROM 0 TO 1,872 FT HOUSTON, TX, USA 7 of 45 vsfusion Union Oil Compan~of California Well: Mastodon 6-3-9 UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 2.2 DIRECTIONAL SURVEY • CONTRACTOR BAKER HUGHES - BAKER ATLAS HOUSTON, TX, USA SURVEY DATE 21 Mar 08 REFERENCE ELEVATION 380.5 0 FT ABOVE SEA LEVEL MEASURED DEPTH VERTICAL DEPTH NORTH-SOUTH EAST-WEST COORDINATE COORDINATE NORTH = + EAST = + (FT) (FT) (FT) (FT) 0.00 0.00 0.00 0.00 177.49 177.49 -0.26 -0.14 295.76 295.76 -0.83 -0.39 415.06 415.06 -1.33 -0.67 479.76 479.75 -1.62 -0.92 600.66 600.65 -2.54 -1.58 722.86 722.84 -3.54 -2.29 844.76 844.74 -4.50 -2.97 969.76 969.73 -5.49 -3.68 1099.26 1099.22 -6.69 -4.38 1228.86 1228.82 -8.10 -4.72 1357.46 1357.41 -9.55 -4.88 1484.56 1484.50 -10.95 -5.22 1614.36 1614.29 -12.32 -5.67 1744.16 1744.08 -13.66 -6.03 1818.09 1818.01 -14.49 -6.22 1937.19 2066.29 1937.10 2066.19 -15.95 -17.64 -6.57 -6.82 • 2195.50 2195.39 -19.13 -7.16 2324.32 2324.20 -20.44 -7.52 2452.62 2452.50 -21.69 -7.78 2580.84 2580.71 -23.12 -8.17 2711.15 2711.00 -24.85 -8.66 2838.98 2838.82 -26.59 -9.00 2967.68 2967.51 -28.59 -9.37 3094.98 3094.79 -30.49 -9.79 3223.68 3223.48 -32.05 -10.10 3352.48 3352.27 -33.38 -10.71 3482.18 3481.96 -34.76 -11.44 3610.48 3610.25 -36.22 -11.99 3738.58 3738.34 -37.60 -12.68 3867.67 3867.42 -39.08 -13.41 3996.67 3996.41 -40.37 -14.06 4124.77 4124.50 -41.59 -14.93 4253.37 4253.10 -42.82 -15.90 4382.77 4382.49 -43.82 -16.91 4446.37 4446.08 -44.29 -17.46 4512.29 4512.00 -44.77 -18.10 4640.99 4640.68 -45.89 -20.21 4770.19 4769.81 -47.90 -23.73 • 8 of 45 VSfUS1011 Union Oil Company of California Well: Mastodon 6-3-9 UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 • 2.3 SOURCE / RECEIVER GEOMETRY TABLE RECEIVER REFERENCE ELEVATION = 380.50 FT ABOVE SEA LEVEL SOURCE / RECEIVER COORDINATES ARE REFERENCED TO WELLHEAD SOURCE / RECEIVER (S-R) OFFSET IS PLAN VIEW --------- - RECEIVER ----- ----- ------ --- SOURCE ----- --------- OFFSET MEASURED VERT. X Y ELEV DEPTH X Y (S-R) DEPTH DEPTH COORD. COORD. COORD. COORD. (DGM) (ES) (DS) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) 250.0 250.0 -0.3 -0.6 355.8 0.0 -197.0 -153.9 249.4 300.0 300.0 -0.4 -0.8 355.8 0.0 -197.0 -153.9 249.2 350.0 350.0 -0.5 -1.1 355.8 0.0 -197.0 -153.9 248.9 380.5 380.5 -0.6 -1.2 355.8 0.0 -197.0 -153.9 248.8 400.0 400.0 -0.6 -1.3 355.8 0.0 -197.0 -153.9 248.7 450.0 450.0 -0.8 -1.5 355.8 0.0 -197.0 -153.9 248.5 500.0 500.0 -1.0 -1.8 355.8 0.0 -197.0 -153.9 248.1 550.0 550.0 -1.3 -2.2 355.8 0.0 -197.0 -153.9 247.6 600.0 600.0 -1.6 -2.5 355.8 0.0 -197.0 -153.9 247.2 650.0 650.0 -1.9 -2.9 355.8 0.0 -197.0 -153.9 246.7 700.0 700.0 -2.2 -3.4 355.8 0.0 -197.0 -153.9 246.2 750.0 750.0 -2.4 -3.8 355.8 0.0 -197.0 -153.9 245.8 800.0 800.0 -2.7 -4.1 355.8 0.0 -197.0 -153.9 245.3 850.0 850.0 -3.0 -4.5 355.8 0.0 -197.0 -153.9 244.8 900.0 900.0 -3.3 -4.9 355.8 0.0 -197.0 -153.9 244.4 • 950.0 1000.0 950.0 1000.0 -3.6 -3.8 -5.3 -5.8 355.8 355.8 0.0 0.0 -197.0 -197.0 -153.9 -153.9 243.9 243.4 1050.0 1050.0 -4.1 -6.2 355.8 0.0 -197.0 -153.9 242.9 1100.0 1100.0 -4.4 -6.7 355.8 0.0 -197.0 -153.9 242.4 1150.0 1150.0 -4.5 -7.2 355.8 0.0 -197.0 -153.9 242.0 1200.0 1200.0 -4.6 -7.8 355.8 0.0 -197.0 -153.9 241.6 1250.0 1250.0 -4.7 -8.3 355.8 0.0 -197.0 -153.9 241.2 1310.0 1310.0 -4.8 -9.0 355.8 0.0 -197.0 -153.9 240.7 1350.0 1350.0 -4.9 -9.5 355.8 0.0 -197.0 -153.9 240.4 1400.0 1399.9 -5.0 -10.0 355.8 0.0 -197.0 -153.9 239.9 1450.0 1449.9 -5.1 -10.6 355.8 0.0 -197.0 -153.9 239.5 1500.0 1499.9 -5.3 -11.1 355.8 0.0 -197.0 -153.9 239.1 1550.0 1549.9 -5.4 -11.6 355.8 0.0 -197.0 -153..9 238.6 1600.0 1599.9 -5.6 -12.2 355.8 0.0 -197.0 -153.9 238.2 1650.0 1649.9 -5.8 -12.7 355.8 0.0 -197.0 -153.9 237.7 1700.0 1699.9 -5.9 -13.2 355.8 0.0 -197.0 -153.9 237.3 1750.0 1749.9 -6.0 -13.7 355.8 0.0 -197.0 -153.9 236.9 1800.0 1799.9 -6.2 -14.3 355.8 0.0 -229.8 -192.8 286.2 1850.0 1849.9 -6.3 -14.9 355.8 0.0 -229.8 -192.8 285.7 1900.0 1899.9 -6.5 -15.5 355.8 0.0 -229.8 -192.8 285.2 1950.0 1949.9 -6.6 -16.1 355.8 0.0 -229.8 -192.8 284.7 2000.0 1999.9 -6.7 -16.8 355.8 0..0 -229.8 -192.8 284.2 2050.0 2049.9 -6.8 -17.4 355.8 0.0 -229.8 -192.8 283.7 2100.0 2099.9 -6.9 -18.0 355.8 0.0 -229.8 -192.8 283.3 2150.0 2149.9 -7.0 -18.6 355.8 0.0 -229.8 -192.8 282.8 2200.0 2199.9 -7.2 -19.2 355.8 0.0 -229.8 -192.8 282.4 2250.0 2249.9 -7.3 -19.7 355.8 0.0 -229.8 -192.8 281.9 2300.0 2299.9 -7.5 -20.2 355.8 0.0 -229.8 -192.8 281.5 2350.0 2349.9 -7.6 -20.7 355.8 0.0 -229.8 -192.8 281.1 • 2400.0 2450.0 2399.9 2449.9 -7.7 -7.8 -21.2 -21.7 355.8 355.8 0.0 0.0 -229.8 -229.8 -192.8 -192.8 280.7 280.4 2500.0 2499.9 -7.9 -22.2 355.8 0.0 -229.8 -192.8 279.9 2550.0 2549.9 -8.1 -22.8 355.8 0.0 -229.8 -192.8 279.4 9 of 45 VSfUS1011 Union Oil Company of California Well: Mastodon 6-3-9 --------- - RECEIVER ----- ----- ------ --- SOURCE ----- --------- OFFSET MEASURED VERT. X Y ELEV DEPTH X Y (S-R) DEPTH DEPTH COORD. COORD. COORD. COORD. (DGM) (ES) (DS) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) (FT) 2600.0 2599.9 -8.2 -23.4 355.8 0.0 -229.8 -192.8 278.9 2650.0 2649.9 -8.4 -24.0 355.8 0.0 -229.8 -192.8 278.4 2700.0 2699.9 -8.6 -24.7 355.8 0.0 -229.8 -192.8 277.8 2750.0 2749.8 -8.8 -25.4 355.8 0.0 -229.8 -192.8 277.3 2800.0 2799.8 -8.9 -26.1 355.8 0.0 -229.8 -192.8 276.8 2850.0 2849.8 -9.0 -26.8 355.8 0.0 -229.8 -192.8 276.3 2900.0 2899.8 -9.2 -27.5 355.8 0.0 -229.8 -192.8 275.7 2950.0 2949.8 -9.3 -28.3 355.8 0.0 -229.8 -192.8 275.1 3000.0 2999.8 -9.5 -29.1 355.8 0.0 -229.8 -192.8 274.5 3050.0 3049.8 -9.6 -29.8 355.8 0.0 -229.8 -192.8 274.0 3100.0 3099.8 -9.8 -30.6 355.8 0.0 -229.8 -192.8 273.4 3150.0 3149.8 -9.9 -31.2 355.8 0.0 -229.8 -192.8 272.9 3200.0 3199.8 -10.0 -31.8 355.8 0.0 -229.8 -192.8 272.5 3250.0 3249.8 -10.2 -32.3 355.8 0.0 -229.8 -192.8 272.0 3300.0 3299.8 -10.5 -32.8 355.8 0.0 -229.8 -192.8 271.5 3350.0 3349.8 -10.7 -33.4 355.8 0.0 -229.8 -192.8 271.0 3400.0 3399.8 -11.0 -33.9 355.8 0.0 -229.8 -192.8 270.5 3450.0 3449.8 -11.3 -34.4 355.8 0.0 -229.8 -192.8 269.9 3500.0 3499.8 -11.5 -35.0 355.8 0.0 -229.8 -192.8 269.4 3550.0 3549.8 -11.7 -35.5 355.8 0.0 -229.8 -192.8 268.9 3600.0 3599.8 -11.9 -36.1 355.8 0.0 -229.8 -192.8 268.4 3650.0 3649.8 -12.2 -36.6 355.8 0.0 -229.8 -192.8 267.9 3700.0 3699.8 -12.5 -37.2 355.8 0.0 -229.8 -192.8 267.3 3750.0 3749.8 -12.7 -37.7 355.8 0.0 -229.8 -192.8 266.8 3800.0 3799.8 -13.0 -38.3 355.8 0.0 -229.8 -192.8 266.2 3850.0 3849.8 -13.3 -38.9 355.8 0.0 -229.8 -192.8 265.7 3900.0 3899.7 -13.6 -39.4 355.8 0.0 -229.8 -192.8 265.1 3950.0 3949.7 -13.8 -39.9 355.8 0.0 -229.8 -192.8 264.6 4000.0 3999.7 -14.1 -40.4 355.8 0.0 -229.8 -192.8 264.2 4050.0 4049.7 -14.4 -40.9 355.8 0.0 -229.8 -192.8 263.6 4100.0 4099.7 -14.8 -41.4 355.8 0.0 -229.8 -192.8 263.0 4150.0 4149.7 -15.1 -41.8 355.8 0.0 -229.8 -192.8 262.5 4200.0 4199.7 -15.5 -42.3 355.8 0.0 -229.8 -192.8 261.9- 4250.0 4249.7 -15.9 -42.8 355.8 0.0 -229.8 -192.8 261.3 4300.0 4299.7 -16.3 -43.2 355.8 0.0 -229.8 -192.8 260.8 4350.0 4349.7 -16.7 -43.6 355.8 0.0 -229.8 -192.8 260.2 4400.0 4399.7 -17.1 -43.9 355.8 0.0 -229.8 -192.8 259.7 4450.0 4449.7 -17.5 -44.3 355.8 0.0 -229.8 -192.8 259.1 4500.0 4499.7 -18.0 -44.7 355.8 0.0 -229.8 -192.8 258.5 4550.0 4549.7 -18.7 -45.1 355.8 0.0 -229.8 -192.8 257.7 4600.0 4599.7 -19.5 -45.5 355.8 0.0 -229.8 -192.8 256.7 4650.0 4649.7 -20.5 -46.0 355.8 0.0 -229.8 -192.8 255.7 4700.0 4699.7 -21.8 -46.8 355.8 0.0 -229.8 -192.8 254.1 4750.0 4749.6 -23.2 -47.6 355.8 0.0 -229.8 -192.8 252.6 4800.0 4799.6 -23.7 -47.9 355.8 0.0 -229.8 -192.8 251.9 • • 10 of 45 VSfL1S1011 Union Oil Co~any of California Well.• Mastodon 6-3-9 UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 • 2.4 TIME / DEPTH INFORMATION TABLE ALL TIMES ARE ONE-WAY TIMES * = NOT USED IN VELOCITY COMPUTATIONS DATUM ELEVATION 355.80 FT ABOVE SEA LEVEL DATUM CORRECT. VELOCITY 13000.0 FT/SEC MEASURED RAW SRC-REC COS(I) TIME CORRECTION VERTICAL GEOPHONE TIME DIST. TIME DEPTH PICK PLAN-VIEW COS DATUM (DGM) (SRC_REC) (TGD) (FT) (MS) (FT) (MS) (MS) (MS) 250.0 29.0 249.4 0.670 -9.6 0.0 19.4 300.0 32.7 249.2 0.741 -8.5 0.0 24.3 350.0 38.6 248.9 0.794 -8.0 0.0 30.7 380.5 41.9 248.8 0.820 -7.6 0.0 34.3 400.0 44.2 248.7 0.834 -7.4 0.0 36.9 450.0 49.8 248.5 0.863 -6.8 0.0 43.0 500.0 55.8 248.1 0.886 -6.3 0.0 49.5 550.0 61.7 247.6 0.905 -5.9 0.0 55.8 600.0 67.3 247.2 0.919 -5.5 0.0 61.8 650.0 72.2 246.7 0.930 -5.0 0.0 67.2 700.0 77.5 246.2 0.939 -4.7 0.0 72.8 750.0 83.6 245.8 0.947 -4.4 0.0 79.2 800.0 89.9 245.3 0.953 -4.2 0.0 85.7 • 850.0 900.0 95.0 101.3 244.8 244.4 0.959 0.963 -3.9 -3.7 0.0 0.0 91.1 97.6 950.0 107.1 243.9 0.967 -3.5 0.0 103.6 1000.0 112.7 243.4 0.970 -3.4 0.0 109.3 1050.0 118.8 242.9 0.973 -3.2 0.0 .115.6 1100.0 125.3 242.4 0.976 -3.1 0.0 122.3 1150.0 131.4 242.0 0.978 -2.9 0.0 128.4 1200.0 137.8 241.6 0.980 -2.8 0.0 134.9 1250.0 144.3 241.2 0.981 -2.7 0.0 141.6 1310.0 151.9 240.7 0.983 -2.6 0.0 149.3 1350.0 157.0 240.4 0.984 -2.5 0.0 154.5 1400.0 163.4 239.9 0.985 -2.4 0.0 160.9 1450.0 169.2 239.5 0.986 -2.3 0.0 166.9 1500.0 175.9 239.1 0.987 -2.3 0.0 173.6 1550.0 181.7 238.6 0.988 -2.2 0.0 179.5 1600.0 187.5 238.2 0.989 -2.1 0.0 185.4 1650.0 193.3 237.7 0.989 -2.0 0.0 191.2 1700.0 199.0 237.3 0.990 -2.0 0.0 197.1 1750.0 204.8 236.9 0.991 -1.9 0.0 202.9 1800.0 213.8 286.2 0.987 -2.7 0.0 211.0 1850.0 219.7 285.7 0.988 -2.6 0.0 217.0 1900.0 224.9 285.2 0.989 -2.6 0.0 222.3 1950.0 230.5 284.7 0.989 -2.5 0.0 228.0 2000.0 236.3 284.2 0.990 -2.4 0.0 233.9 2050.0 243.3 283.7 0.990 -2.4 0.0 240.9 2100.0 247.0 283.3 0.991 -2.3 0.0 244.7 2150.0 252.1 282.8 0.991 -2.2 0.0 249.9 2200.0 257.5 282.4 0.992 -2.1 0.0 255.4 2250.0 262.8 281.9 0.992 -2.1 0.0 260.7 • 2300.0 2350.0 268.2 273.9 281.5 281.1 0.992 0.993 -2.0 -2.0 0.0 0.0 266.2 271.9 2400.0 279.9 280.7 0.993 -1.9 0.0 277.9 2450.0 284.7 280.4 0.993 -1.9 0.0 282.8 11 of 45 VSf11SlOr1 Union Oil Company of California Well: Mastodon 6-3-9 MEASURED RAW SRC-REC COS(I) TIME CORRECTION VERTICAL GEOPHONE TIME DIST. TIME DEPTH (DGM) PICK PLAN-VIEW (SRC_REC) COS DATUM (TGD) • (FT) (MS) (FT) (MS) (MS) (MS) 2500.0 289.2 279.9 0.994 -1.8 0.0 287.4 2550.0 294.4 279.4 0.994 -1.8 0.0 292.6 2600.0 299.6 278.9 0.994 -1.7 0.0 297.8 2650.0 305.5 278.4 0.994 -1.7 0.0 303.8 2700.0 310.0 277.8 0.995 -1.7 0.0 308.4 2750.0 316.4 277.3 0.995 -1.6 0.0 314.7 2800.0 320.5. 276.8 0.995 -1.6 0.0 318.9 2850.0 325.9 276.3 0.995 -1.5 0.0 324.4 2900.0 330.7 275.7 0.995 -1.5 0.0 329.2 .2950.0 335.4 275.1 0.996 -1.5 0.0 333.9 3000.0 341.8 274.5 0.996 -1.4 0.0 340.4 3050.0 347.6 274.0 0.996 -1.4 0.0 346.1 3100.0 351.4 273.4 0.996 -1.4 0.0 350.0 3150.0 356.9 272.9 0.996 -1.4 0.0 355.5 3200.0 361.6 272.5 0.996 -1.3 0.0 360.3 3250.0 367.4 272.0 0.996 -1.3 0.0 366.1 3300.0 372.5 271.5 0.997 -1.3 0.0 371.2 3350.0 377.5 271.0 0.997 -1.2 0.0 376.3 3400.0 383.3 270.5 0.997 -1.2 0.0 382.0 3450.0 388.2 269.9 0.997 -1.2 0.0 387.0 3500.0 392.9 269.4 0.997 -1.2 0.0 391.8 3550.0 397.4 268.9 0.997 -1.2 0.0 396.3 3600.0 402.4 268.4 0.997 -1.1 0.0 401.3 3650.0 407.1 267.9 0.997 -1.1 0.0 406.0 3700.0 413.0 267.3 0.997 -1 1 0 0 411 9 3750.0 417.6 266.8 0.997 . -1.1 . 0.0 . 416.5 * • 3800.0 421.4 266.2 0.998 -1.0 0.0 420.4 3850.0 426.3 265.7 0.998 -1.0 0.0 425.3 3900.0 430.4 265.1 0.998 -1.0 0.0 429.4 3950.0 435.0 264.6 0.998 -1.0 0.0 434.0 4000.0 439.7 264.2 0.998 -1.0 0.0 438.7 4050.0 444.4 263.6 0.998 -0.9 0.0 443.4 4100.0 449.0 263.0 0.998 -0.9 0.0 448.1 4150.0 453.5 262.5 0.998 -0.9 0.0 452.5 4200.0 457.7 261.9 0.998 -0.9 0.0 456.8 4250.0 462.1 261.3 0.998 -0.9 0.0 461.3 4300.0 466.3 260.8 0.998 -0.9 0.0 465.5 4350.0 470.6 260.2 0.998 -0.8 0.0 469.8 4400.0 474.9 259.7 0.998 -0.8 0.0 474.1 4450.0 480.7 259.1 0.998 -0.8 0.0 479.9 4500.0 484.9 258.5 0.998 -0.8 0.0 484.1 4550.0 487.6 257.7 0.998 -0.8 0.0 486.8 4600.0 492.3 256.7 0.998 -0.8 0.0 491.5 4650.0 496.7 255.7 0.998 -0.8 0.0 496.0 4700.0 501.0 254.1 0.999 -0.7 0.0 500.3 4750.0 505.5 252.6 0.999 -0.7 0.0 504.8 4800.0 510.1 251.9 0.999 -0.7 0.0 509.4 • 12 of 45 VSfLiSl011 Union Oil Comnanv of California Well: Mastodon 6-3-9 • • UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 2.5 VELOCITY TABLE RECEIVER REFERENCE ELEVATION = 380.50 FT ABOVE SEA LEVEL DATUM ELEVATION 355.80 FT ABOVE SEA LEVEL DATUM CORRECT. VELOCITY 13000.0 FT/SEC MEASURED DEPTH TIME AVERAGE RMS INTERVAL INTERVAL INTERVAL GEOPHONE CORR. CORR. VELOCITY VELOCITY DEPTH TIME VELOCITY DEPTH TO TO DATUM DATUM (DGM) (DGD) (TGD) (FT) (FT) (MS) (FT/SEC) (FT/5EC) 250.0 350.0 400.0 500.0 650.0 750.0 900.0 1000.0 1050.0 1150.0 1200.0 1250.0 1310.0 1350.0 1400.0 1500.0 1550.0 1600.0 1650.0 1700.0 1900.0 1950.0 2000.0 225.3 325.3 375.3 475.3 625.3 725.3 875.3 975.3 1025.3 1125.3 1175.3 1225.3 1285.3 1325.3 1375.2 1475.2 1525.2 1575.2 1625.2 1675.2 1875.2 1925.2 1975.2 19.4 11585.3 11585.3 30.7 10601.3 10680.1 36.9 10177.8 10289.3 49.5 9605.0 9742.5 -67.2 9309.2 9426.9 79.2 9161.0 9269.2 97.6 8970.8 9069.1 109.3 8921.4 9010.8 115.6 8872.4 8959.8 128.4 8762.3 8848.1 134.9 8709.6 8794.9 141.6 8655.7 8740.9 149.3 8606.3 8690.1 154.5 8577.2 8659.9 160.9 8544.6 8625.8 173.6 8496.5 8573.9 179.5 8496.8 8571.7 185.4 8495.4 8568.0 191.2 8498.6 8568.9 197.1 8501.0 8569.2 222.3 8434.3 8497.3 228.0 8442.5 8504.1 233.9 8444.8 8504.8 (DELDGD) (DELDGT) (FT) (MS) (FT/SEC) 225.3 19.4 11585.3 -------- 100.0 ---------- 11.2 -------- 8898.6 50.0 6.2 8077.9 -------- 100.0 ---------- 12.6 -------- 7929.9 -------- 150.0 ---------- 17.7 -------- 8481.7 -------- 100.0 ---------- 12.0 -------- 8331.5 -------- 150.0 ---------- 18.4 -------- 8152.1 -------- 100_0 ---------- 117 -------- 8511.9 _ -- 50.a ---_ 6.2 8013.4 -------- 100.0 ---------- 12.9 -------- 7773.2 -------- 50.0 ---------- 6.5 -------- 7670.8 -------- 50.0 ---------- 6.6 -------- 7556.1 -------- 60.0 ---------- 7.8 -------- 7708.0 -------- 40.0 ---------- 5.2 -------- 7738.4 -------- 50.0 ---------- 6.4 -------- 7761.5 100.0 12.7 7886.1 -------- 50.0 ---------- 5.9 -------- 8505.6 -------- 50.0 ---------- 5.9 -------- 8454.2 -------- 50.0 ---------- 5.8 -------- 8598.1 -------- 50.0 ---------- 5.8 -------- 8579.9 200.0 25.3 7914.3 -------- 50.0 ---------- 5.7 -------- 8764.2 50.0 -------- 5.9 ---------- 8532.0 -------- 13 of 45 vsfusion Union Oil Comnanv of California Well: Mastodon 6-3-9 MEASURED DEPTH TIME AVERAGE RMS INTERVAL INTERVAL INTERVAL GEOPHONE CORR. CORR. VELOCITY VELOCITY DEPTH TIME VELOCITY DEPTH TO TO DATUM DATUM (DGM) (DGD) (TGD) (DELDGD) (DELDGT) (FT) (FT) (MS) (FT/SEC) (FT/SEC) (FT) (MS) (FT/SEC) 100.0 10.9 9214.6 2100.0 2075.2 244.7 8478.9 8537.5 -------- ---------- -------- 50.0 5.2 9675.9 2150.0 2125.2 249.9 8503.7 8562.6 -------- ---------- -------- 50.0 5.5 9160.7 2200.0 2175.2 255.4 8517.7 8575.8 -------- ---------- -------- 50.0 5.3 9353.7 2250.0 2225.2 260.7 8534.8 8592.5 -------- ---------- -------- 50.0 5.5 9109.8 2300.0 2275.2 266.2 8546.7 8603.4 -------- ---------- -------- 50.0 5.7 8728.1 2350.0 2325.2 271.9 8550.5 8606.1 -------- ---------- -------- 200.0 20.7 9661.2 2550.0 2525.2 292.6 8629.1 8684.9 -------- ---------- -------- 50.0 5.2 9618.1 2600.0 2575.2 297.8 8646.3 8702.1 -------- ---------- -------- 100.0 10.5 9484.6 2700.0 2675.2 308.4 8675.0 8730.0 -------- ---------- -------- 100.0 10.6 9463.4 2800.0 2775.1 318.9 8701.1 8755.3 -------- ---------- -------- 100.0 10.2 9773.5 2900.0 2875.1 329.2 8734.4 8788.7 -------- ---------- -------- 200.0 20.8 9601.5 3100.0 3075.1 350.0 8786.0 8839.2 -------- ---------- -------- 50.0 5.5 9030.3 3150.0 3125.1 355.5 8789.8 8842.2 -------- ---------- -------- 100.0 10.5 9482.4 3250.0 3225.1 366.1 8809.8 8861.2 -------- ---------- -------- 50.0 5.1 9803.6 3300.0 3275.1 371.2 8823.4 8874.9 -------- ---------- -------- 50.0 5.1 9794.3 3350.0 3325.1 376.3 8836.6 8888.0 -------- ---------- -------- 100.0 10.7 9350.0 3450.0 3425.1 387.0 8850.8 8901.1 -------- ---------- -------- 50.0 4.8 10469.2 3500.0 3475.1 391.8 8870.5 8921.8 -------- ---------- -------- 100.0 9.5 10488.8 3600.0 3575.1 401.3 8909.0 8962.3 -------- ---------- -------- 50.0 4.7 10572.3 3650.0 3625.1 406.0 8928.3 8982.7 -------- ---------- -------- 300.0 28.0 10701.8 3950.0 3925.0 434.0 9042.9 9103.5 -------- ---------- -------- 50.0 4.7 1.0712.1 4000.0 3975.0 438.7 9060.6 9122.1 -------- ---------- -------- 50.0 4.7 10628.1 4050.0 4025.0 443.4 9077.3 9139.4 -------- ---------- -------- 50.0 4.6 10752.4 4100.0 4075.0 448.1 9094.6 9157.6 -------- ---------- -------- 50.0 4.5 11160.8 4150.0 4125.0 452.5 9115.1 9179.6 -------- ---------- -------- 100.0 8.7 11475.6 4250.0 4225.0 461.3 9159.7 9228.2 -------- ---------- -------- 50.0 4.2 11886.9 4300.0 4275.0 465.5 9184.3 9255.7 -------- ---------- -------- 50.0 4.3 11667.1 4350.0 4325.0 469.8 9207.0 9280.5 -------- ---------- -------- 14 of 45 VSfUS1011 ~~ • • Union Oil Company of California Well: Mastodon 6-3-9 MEASURED DEPTH TIME AVERAGE RMS INTERVAL INTERVAL INTERVAL GEOPHONE CORR. CORR. VELOCITY VELOCITY DEPTH TIME VELOCITY • DEPTH TO DATUM TO DATUM (DGM) (DGD) (TGD) (DELDGD) (DELDGT) (FT) (FT) (MS) (FT/SEC) (FT/SEC) (FT) (MS) (FT/SEC) 50.0 4.4 11491.2 4400.0 4375.0 474.1 9227.9 9303.2 -------- --------- --------- 200.0 17.4 11470.5 4600.0 4575.0 491.5 9307.5 9388.6 -------- --------- --------- 50.0 4.4 11287.4 4650.0 4625.0 496.0 9325.2 9407.3 -------- --------- --------- 50.0 4.3 11554.4 4700.0 4675.0 500.3 9344.4 9427.9 -------- --------- --------- 50.0 4.5 11124.1 4750.0 4724.9 504.8 9360.3 9444.4 -------- --------- --------- 50.0 4.6 10840.4 4800.0 4774.9 509.4 9373.7 9457.9 -------- --------- --------- • • 15 of 45 VSfUS10I1 Union Oil Company of California Well: Mastodon 6-3-9 3. INTERPO LATED TABLES WELL MASTODON 6-3 -9 DATUM E LEVATION 355.80 FT A BOVE SEA • LEVEL DATUM C ORRECT. V ELOCITY 13000.0 FT/S EC 3.1 DATA INTERPOLATED EVERY 10.00 FT BELOW DATUM DATUM ------ TIME ------ -------- VELOCITY -------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS (DGD) (TGD) 10.0 0.9 1.7 11585.3 11585.3 11585.3 20.0 1.7 3.5 11585.3 11585.3 11585.3 30.0 2.6 5.2 11585.3 11585.3 11585.3 40.0 3.5 6.9 11585.3 11585.3 11585.3 50.0 4.3 8.6 11585.3 11585.3 11585.3 60.0 5.2 10.4 11585.3 11585.3 11585.3 70.0 6.0 12.1 11585.3 11585.3 11585.3 80.0 6.9 13.8 11585.3 11585.3 11585.3 90.0 7.8 15.5 11585.3 11585.3 11585.3 100.0 8.6 17.3 11585.3 11585.3 11585.3 110.0 9.5 19.0 11585.3 11585.3 11585.3 120.0 10.4 20.7 11585.3 11585.3 11585.3 130.0 11.2 22.4 11585.3 11585.3 11585.3 140.0 12.1 24.2 11585.3 11585.3 11585.3 150.0 12.9 25.9 11585.3 11585.3 11585.3 160.0 13.8 27.6 11585.3 11585.3 11585.3 170.0 14.7 29.3 11585.3 11585.3 11585.3 180.0 15.5 31.1 11585.3 11585.3 11585.3 190.0 16.4 32.8 11585.3 11585.3 11585.3 200.0 17.3 34.5 11585.3 11585.3 11585.3 210.0 18.1 36.3 11585.3 11585.3 • 11585.3 220.0 19.0 38.0 11585.3 11585.3 11585.3 230.0 20.0 40.0 11514.3 10145.6 11518.5 240.0 21.1 42.2 11374.9 8898.6 11394.1 250.0 22.2 44.4 11249.7 8898.6 11281.2 260.0 23.3 46.7 11136.5 8898.6 11178.2 270.0 24.5 48.9 11033.8 8898.6 11083.7 280.0 25.6 51.2 10940.0 8898.6 10996.9 290.0 26.7 53.4 10854.1 8898.6 10916.8 300.0 27.8 55.7 10775.2 8898.6 10842.6 310.0 29.0 57.9 10702.4 8898.5 10773.7 320.0 30.1 60.2 10635.0 8898.6 10709.6 330.0 31.3 62.5 10554.4 8493.0 10634.5 340.0 32.5 65.0 10460.1 8077.9 10548.5 350.0 33.7 67.5 10372.7 8077.9 10468.2 360.0 35.0 70.0 10291.5 8077.9 10392.9 370.0 36.2 72.4 10215.8 8077.9 10322.4 380.0 37.5 74.9 10142.2 8007.6 10253.7 390.0 38.7 77.5 10070.2 7929.9 10186.4 400.0 40.0 80.0 10002.7 7929.9 10122.9 410.0 41.3 82.5 9939.3 7929.9 10062.9 420.0 42.5 85.0 9879.7 7929.9 10006.2 430.0 43.8 87.5 9823.5 7929.9 9952.4 440.0 45.0 90.1 9770.5 7929.9 9901.4 450.0 46.3 92.6 9720.4 7929.9 9852.9 460.0 47.6 95.1 9672.9 7929.9 9806.8 470.0 48.8 97.6 9627.8 7929.9 9762.9 480.0 50.0 100.1 9592.5 8180.6 9727.3 490.0 51.2 102.4 9566.9 8481.8 9700.4 500.0 52.4 104.8 9542.5 8481.7 • 9674.7 510.0 53.6 107.2 9519.2 8481.8 9650.0 520.0 54.8 109.5 9496.8 8481.7 9626.4 16 of 45 VSfL1S1011 Union Oil Company of California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS • (DGD) (TGD) 530.0 55.9 111.9 9475.4 8481.7 9603.6 540.0 57.1 114.2 9454.9 8481.8 9581.8 550.0 58.3 116.6 9435.2 8481.8 9560.8 560.0 59.5 118.9 9416.3 8481.7 9540.6 570.0 60.7 121.3 9398.2 8481.7 9521..1 580.0 61.8 123.7 9380.7 8481.8 9502.4 5,90.0 63.0 126.0 9363.9 8481.8 9484.3 600.0 64.2 128.4 9347.7 8481.7 9466.8 610.0 65.4 130.7 9332.0 8481.8 9450.0 620.0 66.5 133.1 9317.0 8481.8 9433.7 630.0 67.7 135.5 9301.1 8410.2 9416.7 640.0 68.9 137.9 9284.2 8331.6 9398.9 650.0 70.1 140.3 9267.9 8331.6 9381.6 660.0 71.3 142.7 9252.1 8331.6 9364.9 670.0 72.5 145.1 9236.9 8331.6 9348.8 680.0 73.7 147.5 9222.2 8331.5 9333.1 690.0 74.9 149.9 9207.9 8331.6 9317.9 700.0 76.1 152.3 9194.1 8331.6 9303.1 710.0 77.3 154.7 9180.7 8331.6 9288.8 720.0 78.5 157.1 9167.7 8331.6 9275.0 730.0 79.7 159.5 9153.7 8245.9 9260.2 740.0 81.0 162.0 9138.5 8152.1 9244.4 750.0 82.2 164.4 9123.8 8152.1 9229.0 760.0 83.4 166.9 9109.5 8152.1 9214.1 770.0 84.7 169.3 9095.6 8152.1 9199.6 780.0 85.9 171.8 9082.2 8152.1 9185.5 790.0 87.1 174.2 9069.1 8152.1 9171.7 800.0 88.3 176.7 9056.3 8152.1 9158.3 • 810.0 89.6 179.1 9043.9 8152.1 9145.3 820.0 90.8 181.6 9031.9 8152.1 9132.6 830.0 92.0 184.0 9020.2 8152.1 9120.2 840.0 93.2 186.5 9008.7 8152.1 9108.2 850.0 94.5 188.9 8997.6 8152.1 9096.4 860.0 95.7 191.4 8986.8 8152.1 9084.9 870.0 96.9 193.8 8976.2 8152.1 9073.7 880.0 98.1 196.2 8968.2 8318.2 9064.8 890.0 99.3 198.6 8962.8 8511.8 9058.5 900.0 100.5 200.9 8957.5 8511.9 9052.3 910.0 101.6 203.3 8952.3 8511.8 9046.2 920.0 102.8 205.6 8947.3 8511.9 9040.3 930.0 104.0 208.0 8942.4 8511.8 9034.5 940.0 105.2 210.3 8937.6 8511.9 9028.8 950.0 106.3 212.7 8932.9 8511.8 9023.3 960.0 107.5 215.0 8928.3 8511.9 9017.8 970.0 108.7 217.4 8923.8 8511.8 9012.5 980.0 109.9 219.8 8916.6 8268.5 9004.7 990.0 111.2 222.3 8906.4 8013.5 8994.1 1000.0 112.4 224.8 8896.5 8013.5 8983.8 1010.0 113.7 227.3 8886.8 8013.5 8973.8 1020.0 114.9 229.$ 8877.3 8013.4 8963.9 1030.0 116.2 232.3 8866.6 7897.8 8952.9 1040.0 117.5 234.9 8854.7 7773.2 8940.9 1050.0 118.7 237.5 8843.0 7773.2 8929.0 1060.0 120.0 240.1 8831.5 7773.2 8917.4 1070.0 121.3 242.6 8820.3 7773.1 8906.1 1080.0 122.6 245.2 8809.3 7773.2 8894.9 • 1090.0 1100.0 123.9 125.2 247.8 250.3 8798.5 8788.0 7773.2 7773.2 8884.0 8873.3 1110.0 126.5 252.9 8777.7 7773.1 8862.8 1120.0 127.7 255.5 8767.5 7773.2 8852.5 17 of 45 VSfUS1011 Union Oil Company o California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS (DGD) (TGD) • 1130.0 129.0 258.1 8757.1 7724.2 8841.9 1140.0 130.3 260.7 8746.2 7670.8 8830.9 1150.0 131.6 263.3 8735.6 7670.8 8820.2 1160.0 132.9 265.9 8725.1 7670.8 8809.7 1170.0 134.3 268.5 8714.9 7670.8 8799.3 1180.0 135.6 271.1 8704.2 7616.0 8788.6 1190.0 136.9 273.8 8693.1 7556.1 8777.5 1200.0 138.2 276.4 8682.2 7556.1 8766.6 1210.0 139.5 279.1 8671.6 7556.1 8755.9 1220.0 140.9 281.7 8661.1 7556.1 8745.4 1230.0 142.2 284.3 8651.6 7627.3 8735.8 1240.0 143.5 286.9 8643.0 7708.0 8727.0 1250.0 144.8 289.5 8634.6 7707.9 8718.4 1260.0 146.1 292.1 8626.4 7707.9 8710.0 1270.0 147.4 294.7 8618.3 7707.9 8701.6 1280.0 148.7 297.3 8610.4 7708.0 8693.5 1290.0 150.0 299.9 8602.7 7722.3 8685.5 1300.0 151.2 302.5 8595.3 7738.4 8677.9 1310.0 152.5 305.1 8588.1 7738.3 8670.4 1320.0 153.8 307.7 8580.9 7738.3 8662.9 1330.0 155.1 310.2 8574.0 7749.4 8655.7 1340.0 156.4 312.8 8567.3 7761.5 8648.8 1350.0 157.7 315.4 8560.7 7761.5 8641.9 1360.0 159.0 318.0 8554.3 7761.5 8635.1 1370.0 160.3 320.5 8547.9 7761.5 8628.4 1380.0 161.6 323.1 8542.1 7820.2 8622.3 1390.0 162.8 325.6 8537.0 7886.1 8616.8 1400.0 164.1 328.2 8532.0 7886.0 8611.4 1410.0 165.4 330.7 8527.0 7886.0 • 8606.1 1420.0 166.6 333.2 8522.2 7886.1 8600.9 1430.0 167.9 335.8 8517.3 7886.0 8595.7 1440.0 169.2 338.3 8512.6 7886.0 8590.6 1450.0 170.4 340.9 8508.0 7886.0 8585.5 1460.0 171.7 343.4 8503.4 7886.1 8580.6 1470.0 173.0 345.9 8498.8 7886.0 8575.7 1480.0 174.2 348.4 8496.5 8169.4 8572.9 1490.0 175.4 350.7 8496.6 8505.5 8572.5 1500.0 176.5 353.1 8496.6 8505.6 8572.0 1510.0 177.7 355.4 8496.7 8505.5 8571.6 1520.0 178.9 357.8 8496.8 8505.6 8571.2 1530.0 180.1 360.1 8496.7 8481.0 8570.6 1540.0 181.3 362.5 8496.4 8454.3 8569.8 1550.0 182.4 364.9 8496.1 8454.2 8569.1 1560.0 183.6 367.2 8495.8 8454.2 8568.3 1570.0 184.8 369.6 8495.6 8454.3 8567.6 1580.0 186.0 372.0 8495.7 8522.2 8567.3 1590.0 187.1 374.3 8496.4 8598.2 8567.5 1600.0 188.3 376.6 8497.0 8598.0 8567.7 1610.0 189.5 378.9 8497.6 8598.2 8567.9 1620.0 190.6 381.3 8498.2 8598.2 8568.1 1630.0 191.8 383.6 8498.8 8589.5 8568.2 1640.0 193.0 385.9 8499.3 8579.9 8568.3 1650.0 194.1 388.2 8499.8 8579.9 8568.3 1660.0 195.3 390.6 8500.2 8579.9 8568.4 1670.0 196.5 392.9 8500.7 8579.9 8568.5 1680.0 197.7 395.3 8499.2 8248.5 8566.6 1690.0 198.9 397.9 8495.5 7914.3 8562.6 1700.0 200.2 400.4 8491.8 7914.2 • 8558.6 1710.0 201.5 402.9 8488.2 7914.3 8554.7 1720.0 202.7 405.4 8484.6 7914.3 8550.9 18 of 45 VSfUS1011 Union Oil Company of California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS • (DGD) (TGD) 1730.0 204.0 408.0 8481.1 7914.2 8547.1 1740.0 205.2 410.5 8477.6 7914.3 8543.3 1750.0 206.5 413.0 8474.1 7914.2 8539.6 1760.0 207.8 415.5 8470.7 7914.3 8536.0 1770.0 209.0 418.1 8467.4 7914.3 8532.4 1780.0 210.3 420.6 8464.0 7914.2 8528.8 1790.0 211.6 423.1 8460.7 7914.3 8525.2 1800.0 212.8 425.7 8457.5 7914.2 8521.7 1810.0 214.1 428.2 8454.3 7914.3 8518.3 1820.0 215.4 430.7 8451.1 7914.3 8514.9 1830.0 216.6 433.2 8448.0 7914.2 8511.5 1840.0 217.9 435.8 8444.9 7914..3 8508.1 1850.0 219.1 438.3 8441.8 7914.2 8504.8 1860.0 220.4 440.8 8438.8 7914.3 8501.6 1870.0 221.7 443.3 8435.8 7914.3 8498.3 1880.0 223.2 446.4 8422.1 6461.8 8485.9 1890.0 224.3 448.6 8426.1 9239.4 8489.7 1900.0 225.4 450.8. 8430.1 9264.3 8493.6 1910.0 226.4 452.9 8435.1 9508.3 8498.6 1920.0 227.5 455.0 8440.3 9558.5- 8503.7 1930.0 228.6 457.1 8443.8 9175.8 8507.1 1940.0 229.7 459.4 8445.7 8830.6 8508.7 1950.0 230.8 461.7 8447.5 8804.3 8510.2 1960.0 231.9 463.9 8450.4 9060.9 8512.9 1970.0 233.0 466.1 8453.2 9044.1 8515.5 1980.0 234.2 468.3 8455.6 8959.7 8517.7 1990.0 235.3 470.5 8458.4 9045.2 8520.2 . 2000.0 2010.0 236.4 237.4 472.7 474.9 8461.8 8465.3 9210.8 9224.2 8523.5 8526.8 2020.0 238.5 477.0 8469.2 9331.9 8530.6 2030.0 239.6 479.2 8472.9 9296.7 8534.2 2040.0 240.7 481.4 8476.0 9143.6 8537.1 2050.0 241.7 483.5 8480.4 9505.4 8541.5 2060.0 242.8 485.7 8483.3 9105.0 8544.2 2070.0 243.9 487.8 8486.3 9160.9 8547.0 2080.0 245.0 489.9 8491.0 9596.7 8551.8 2090.0 246.1 492.1 8493.7 9079.5 8554.2 2100.0 247.2 494.3 8496.7 9188.1 8557.1 2110.0 248.2 496.5 8500.0 9249.2 8560.2 2120.0 249.3 498.7 8502.7 9109.7 8562.7 2130.0 250.4 500.8 8506.7 9450.7 8566.7 2140.0 251.5 503.1 8507.9 8764.8 8567.6 2150.0 252.6 505.3 8510.3 9062.2 8569.8 2160.0 253.7 507.5 8512.4 8987.3 8571.7 2170.0 254.8 509.7 8515.4 9227.3 8574.6 2180.0 256.0 511.9 8516.7 8795.6 8575.6 2190.0 257.1 514.1 8519.2 9121.1 8578.0 2200.0 258.2 516.3 8522.0 9179.2 8580.6 2210.0 259.2 518.5 8524.6 9140.3 8583.0 2220.0 260.4 520.7 8526.9 9059.9 8585.1 2230.0 261.5 522.9 8528.8 8973.8 8586.8 2240.0 262.6 525.1 8531.0 9060.7 8588.9 2250.0 263.6 527.3 8534.3 9346.8 8592.1 2260.0 264.7 529.5 8537.1 9206.0 8594.7 2270.0 265.8 531.6 8540.4 9344.1 8597.8 2280.0 266.8 533.6 8545.0 9748.9 8602.5 • 2290.0 2300.0 267.9 269.0 535.8 538.1 8548.5 8549.2 9426.7 8707.0 8606.0 8606.4 2310.0 270.1 540.1 8553.3 9628.0 8610.6 2320.0 271.1 542.2 8557.7 9698.1 8615.0 19 of 45 VSfUS1021 Union Oil Company of California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS (DGD) (TGD) • 2330.0 272.1 544.3 8561.6 9595.9 8618.9 2340.0 273.2 546.5 8564.2 9212.5 8621.4 2350.0 274.3 548.5 8568.1 9574.3 8625.2 2360.0 275.4 550.7 8570.6 9208.1 8627.6 2370.0 276.4 552.8 8574.3 9556.7 8631.3 2380.0 277.5 554.9 8577.6 9440.0 8634.5 2390.0 278.5 557.0 8581.1 9483.7 8637.9 2400.0 279.6 559.1 8585.1 9685.5 8642.0 2410.0 280.6 561.1 8589.8 9866.6 8646.7 2420.0 281.6 563.2 8593.8 9680.6 8650.7 2430.0 282.7 565.4 8596.4 9283.0 8653.2 2440.0 283.8 567.5 8598.9 9242.1 8655.6 2450.0 284.9 569.7 8600.8 9101.2 8657.3 2460.0 285.9 571.8 8604.0 9467.0 8660.4 2470.0 287.0 574.0 8606.7 9334.3 8663.1 2480.0 288.0 576.0 8611.4 9934.8 8667.8 2490.0 289.0 578.1 8614.9 9576.0 8671.3 2500.0 290.1 580.2 8618.1 9508.2 8674.5 2510.0 291.1 582.2 8621.8 9663.8 8678.2 2520.0 292.2 584.3 8625.7 9724.9 8682.1 2530.0 293.2 586.4 8629.2 9600.9 8685.5 2540.0 294.2 588.5 8632.8 9672.1 8689.2 2550.0 295.3 590.5 8636.3 9616.2 8692.6 2560.0 .296.2 592.5 8641.6 10236.8 8698.2 2570.0 297.3 594.6 8644.5 9473.5 8701.0 2580.0 298.4 596.7 8647.4 9444.9 8703.8 2590.0 299.4 598.8 8650.9 9687.8 8707.4 2600.0 2610.0 300.4 301.5 600.8 602.9 8655.0 8658.1 9858.0 9527.5 8711.5 8714.5 2620.0 302.5 604.9 8662.0 9820.5 8718.4 2630.0 303.5 607.0 8665.2 9611.6 8721.7 2640.0 304.6 609.2 8667.5 9310.7 8723.8 2650.0 305.6 611.3 8670.3 9467.2 8726.5 2660.0 306.7 613.5 8671.8 9104.8 8727.9 2670.0 307.8 615.7 8673.1 9026.3 8729.0 2680.0 308.9 617.8 8676.4 9641.9 8732.2 2690.0 309.9 619.9 8679.1 9478.7 8734.8 2700.0 311.0 622.0 8681.1 9258.3 8736.7 2710.0 312.1 624.1 8684.5 9696.4 8740.1 2720.0 313.1 626.2 8687.5 9597.8 8743.0 2730.0 314.1 628.2 8691.2 9832.0 8746.8 2740.0 315.1 630.3 8694.9 9824.3 8750.5 2750.0 316.1 632.3 8698.6 9860.7 8754.3 2760.0 317.1 634.2 8703.4 10263.1 8759.3 2770.0 318.2 636.3 8706.3 9579.9 8762.1 2780.0 319.2 638.4 8708.8 9467.8 8764.6 2790.0 320.2 640.4 8713.3 10167.9 8769.2 2800.0 321.2 642.5 8716.0 9536.9 8771.8 2810.0 322.3 644.6 8718.7 9546.4 8774.5 2820.0 323.3 646.7 8721.4 9546.1 8777.1 2830.0 324.4 648.8 8723.8 9459.0 8779.4 2840.0 325.5 651.0 8725.6 9283.0 8781.1 2850.0 326.5 653.1 8728.3 9553.4 8783.7 2860.0 327.6 655.2 8730.6 9447.9 8785.9 2870.0 328.6 657.2 8734.4 9980.2 8789.8 2880.0 329.6 659.1 8738.6 10125.5 8794.1 2890.0 2900.0 330.6 331.6 661.2 663.3 8741.8 8744.7 9787.3 9684.4 8797.3 8800.2 • 2910.0 332.6 665.3 8748.0 9795.5 8803.5 2920.0 333.7 667.4 8750.5 9551.4 8805.9 20 of 45 ysfusion Union Oil Company of California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS • (DGD) (TGD) 2930.0 334.8 669.5 8752.3 9333.2 8807.6 2940.0 335.8 671.6 8754.8 9523.6 8810.0 2950.0 336.9 673.8 8756.3 9219.5 8811.3 2960.0 338.0 676.0 8757.2 9031.7 8812.1 2970.0 339.1 678.2 8758.3 9110.8 8813.0 2980.0 340.1 680.3 8761.3 9765.5 8816.1 2990.0 341.2 682.4 8763.6 9485.0 8818.2 3000.0 342.2 684.5 8766.0 9547.0 8820.5 3010.0 343.3 686.7 8767.0 9085.8 8821.4 3020.0 344.4 688.8 8768.9 9377.3 8823.2 3030.0 345.4 690.9 8771.4 9602.6 8825.6 3040.0 346.5 693.0 8774.0 9656.1 8828.2 3050.0 347.5 695.0 8777.0 9763.4 8831.1 3060.0 348.5 697.1 8779.3 9561.2 8833.4 3070.0 349.6 699.2 8781.7 9572.6 8835.7 3080.0 350.6 701.3 8784.3 9663.2 8838.3 3090.0 351.7 703.3 8787.1 9758.5 8841.1 3100.0 352.7 705.4 8789.3 9523.4 8843.2 3110.0 353.8 707.5 8791.5 9519.5 8845.3 3120.0 354.8 709.5 8794.3 9778.0 8848.1 3130.0 355.8 711.7 8796.5 9515.6 8850.1 3140.0 356.9 713.9 8797.1 9012.8 8850.7 3150.0 358.1 716.1 8797.6 8940.8 8850.9 3160.0 359.1 718.1 8800.5 9819.6 8853.8 3170.0 360.1 720.1 8804.2 10170.4 8857.7 3180.0 361.1 722.2 8806.2 9495.2 8859.6 3190.0 362.1 724.3 8808.7 9655.5 8862.0 • 3200.0 3210.0 363.2 364.3 726.5 728.6 8809.6 8811.7 9127.3 9547.5 8862.8 8864.9 3220.0 365.4 730.7 8813.2 9318.9 8866.2 3230.0 366.4 732.8 8815.4 9583.0 8868.4 3240.0 367.5 735.0 8815.9 8966.0 8868.7 3250.0 368.6 737.2 8816.8 9133.9 8869.4 3260.0 369.7 739.4 8818.1 9247.6 8870.6 3270.0 370.7 741.4 8821.3 10016.5 8873.9 3280.0 371.7 743.4 8824.0 9783.2 8876.5 3290.0 372.7 745.4 8827.2 10052.5 8879.8 3300.0 373.7 747.5 8829.7 9716.8 8882.3 3310.0 374.8 749.7 8830.7 9172.0 8883.1 3320.0 375.9 751.7 8833.2 9739.9 8885.6 3330.0 376.9 753.9 8834.5 9303.8 8886.8 3340.0 378.0 756.0 8836.1 9409.3 8888.3 3350.0 379.1. 758.1 8837.7 9391.5 8889.7 3360.0 380.1 760.3 8839.0 9316.8 8891.0 3370.0 381.2 762.5 8839.5 9009.4 8891.3 3380.0 382.2 764.5 8842.9 10157.2 8894.8 3390.0 383.3 766.7 8843.6 9075.8 8895.3 3400.0 384.4 768.8 8845.2 9441.9 8896.9 3410.0 385.4 770.8 8848.0 9896.4 8899.7 3420.0 386.4 772.7 8851.6 10265.0 8903.4 3430.0 387.4 774.8 8853.5 9553.4 8905.2 3440.0 388.4 776.8 8856.7 10137.7 8908.5 3450.0 389.4 778.7 .8860.6 10402.5 8912.5 3460.0 390.4 780.8 8863.2 9894.3 8915.2 3470.0 391.4 782.7 8866.2 10029.1 8918.2 3480.0 392.3 784.7 8869.8 10310.2 8921.9 • 3490.0 3500.0 393.3 394.3 786.6 788.6 8873.3 8876.8 10281.8 10320.6 8925.6 8929.3 3510.0 395.2 790.4 8881.8 11072.9 8934.7 3520.0 396.2 792.3 8885.1 10184.0 8938.1 21 of 45 VSfUSIOrI Union Oil Company of California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS (DGD) (TGD) • 3530.0 397.2 794.3 8888.0 10057.7 8941.0 3540.0 398.1 796.3 8891.6 10368.6 8944.8 3550.0 399.1 798.1 8895.7 10654.9 8949.2 3560.0 400.0 800.0 8899.8 10610.4 8953.4 3570.0 401.0 801.9 8903.7 10560.4 8957.6 3580.0 401.9 803.8 8907.3 10433.7 8961.4 3590.0 402.9 805.8 8910.8 10339.2 8964.9 3600.0 403.8 807.7 8914.5 10480.1 8968.8 3610.0 404.8 809.6 8918.1 10433.0 8972.6 3620.0 405.8 811.5 8921.4 10316.4 8976.0 3630.0 406.7 813.4 8925.1 10466.3 8979.8 3640.0 407.7 815.4 8928.5 10404.2 8983.4 3650.0 408.6 817.2 8933.5 11175.6 8988.8 3660.0 409.5 819.0 8937.6 10745.7 8993.2 3670.0 410.5 820.9 8941.2 10519.1 8997.0 3680.0 411.4 822.8 8945.6 10893.3 9001.7 3690.0 412.4 824.7 8948.5 10156.5 9004.7 3700.0 413.4 826.7 8950.8 9902.4 9007.0 3710.0 414.3 828.6 8954.8 10709.5 9011.2 3720.0 415.2 830.4 8959.1 10932.5 9015.8 3730.0 416.1 832.3 8963.5 10930.3 9020.5 3740.0 417.1 834.2 8967.0 10508.6 9024.2 3750.0 418.1 836.1 8970.1 10316.1 9027.4 3760.0 419.0 838.0 8974.1 10741.8 9031.5 3770.0 419.9 839.9 .8977.7 10604.2 9035.4 3780.0 420.9 841.7 8981.4 10642.8 9039.3 3790.0 421.7 843.4 8987.1 11795.1 9045.7 3800.0 3810.0 422.6 423.6 845.3 847.1 8990.9 8995.0 10719.4 10882.4 9049.7 9054.1 • 3820.0 424.5 848.9 8999.4 11043.0 9058.8 3830.0 425.4 850.7 9004.3 11351.0 9064.1 3840.0 426.3 852.5 9008.5 11010.8 9068.7 3850.0 427.2 854.4 9011.7 10404.9 9072.0 3860.0 428.1 856.3 9015.6 10849.6 9076.2 3870.0 429.1 858.1 9019.5 10799.9 9080.2 3880.0 430.0 860.0 9023.6 10975.0 9084.7 3890.0 430.9 861.9 9027.1 10584.3 9088.2 3900.0 431.9 863.8 9030.3 10502.6 9091.6 3910.0 432.8 865.6 9034.1 10806.7 9095.6 3920.0 433.7 867.5 9037.5 10579.9 9099.1 3930.0 434.7 869.3 9041.3 10863.3 9103.2 3940.0 435.6 871.2 9044.9 10686.1 9106.9 3950.0 436.5 873.1 9048.6 10796.0 9110.8 3960.0 437.5 874.9 9052.2 10754.5 9114.6 3970.0 438.4 876.8 9055.5 10556.0 9118.0 3980.0 439.3 878.6 9059.6 11053.1 9122.4 3990.0 440.2 880.4 9064.2 11378.6 9127.4 4000.0 441.1 882.2 9068.7 11286.1 9132.3 4010.0 442.0 884.0 9072.6 10989.3 9136.5 4020.0 442.9 885.8 9076.1 10712.7 9140.1 4030.0 443.8 887.6 9080.7 11401.1 9145.1 4040.0 444.7 889.4 9085.0 11239.2 9149.8 4050.0 445.6 891.2 9088.4 10714.4 9153.3 4060.0 446.5 893.0 9092.5 11114.6 9157.7 4070.0 447.4 894.8 9096.8 11278.7 9162.4 4080.0 -448.3 896.6 9100.9 11149.0 9166.8 4090.0 4100.0 449.2 450.1 898.5 900.3 9104.5 9108.6 10825.2 11156.2 9170.5 9174.9 • 4110.0 451.0 902.0 9113.5 11743.1 9180.4 4120.0 451.9 903.7 9117.7 11220.4 9184.9 22 of 45 VSfL1S1021 Union Oil Com~any of California Well: Mastodon 6-3-9 DATL7M ------. TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS • (DGD) (TGD) 4130.0 452.7 905.5 9122.5 11637.6 9190.2 4140.0 453.6 907.2 9126.6 11226.9 9194.6 4150.0 454.5 909.0 9131.4 11642.2 9199.9 4160.0 455.3 910.7 9136.1 11621.9 9205.0 4170..0 45.6.2 912.4 9140.3 11329.4 9209.6 4180.0 457.1 914.2 9144.5 11304.8 9214.1 4190.0 458.0 916.0 9148.7 11301.6 9218.6 4200.0 458.9 917.8 9152.5 11084.5 9222.7 4210.0 459.8 919.6 9156.3 11124.0 9226.8 4220.0 460.7 921.4 9160.2 11160.8 9230.9 4230.0 461.6 923.2 9163.7 10888.2 9234.5 4240.0 462.5 924.9 9168.3 11666.6 9239.6 4250.0 463.3 926.6 9173.4 12015.3 9245.4 4260.0 464.1 928.3 9178.2 11799.8 9250.7 4270.0 465.0 930.0 .9183.2 11931.3 9256.2 4280.0 465.8 931.6 9188.0 11879.8 9261.6 4290.0 466.6 933.3 9193.4 12208.6 9267.6 4300.0 467.5 935.0 9197.6 11445.7 9272.1 4310.0 468.4 936.7 9202.2 11752.4 9277.2 4320.0 469.2 938.4 9207.1 11940.4 9282.7 4330.0 470.1 940.2 9211.2 11437.3 9287.2 4340.0 470.9 941.9 9215.5 11503.2 9291.7 4350.0 471.8 943.6 9220.0 11698.3 9296.7 4360.0 472.7 945.4 9224.0 11384.5 9301.0 4370.0 473.6 947.2 9227.6 11134.6 9304.8 4380.0 474.4 948.9 9232.1 11728.0 9309.7 4390.0 475.4 950.7 9235.2 10809.9 9312.9 • 4400.0 4410.0 476.3 477.2 952.6 954.4 9237.7 9241.7 10513.3 11373.8 9315.4 9319.6 4420.0 478.1 956.1 9245.7 11477.4 9324.0 4430.0 478.9 957.8 9250.1 11670.3 9328.7 4440.0 479.8 959.6 9254.0 11380.1 9332.9 4450.0 480.6 961.2 9258.8 12065.7 9338.3 4460.0 481.4 962.9 9263.8 12195.5 9343.9 4470.0 482.4 964.7 9267.1 11005.6 9347.3 4480.0 483.2 966.3 9272.1 12217.7 9352.9 4490.0 484.0 968.1 9276.2 11585.8 9357.4 4500.0 484.9 969.7 9280.9 11990.6 9362.6 4510.0 485.7 971.5 9285.0 11563.7 9366.9 4520.0 486.5 973.1 9290.2 12420.6 9372.8 4530.0 487.3 974.7 9295.3 12362.0 9378.6 4540.0 488.2 976.4 9299.7 11886.7 9383.5 4550.0 489.1 978.2 9302.9 11015.6- 9386.7 4560.0 490.0 980.1 9305.4 10581.9 9389.2 4570.0 491.0 981.9 9308.2 10817..7 9392.1 4580.0 491.8 983.7 9312.1 11490.7 9396.2 4590.0 492.7 985.4 9315.9 11479.8 9400.3 4600.0 493.6 987.2 9319.3 11205.0 9403.9 4610.0 494.5 989.0 9322.5 11044.9 9407.2 4620.0 495.4 990.8 9325.6 11034.1 9410.4 4630.0 496.3 992.6 9329.1 11252.4 9414.0 4640.0 497.2 994.4 9332.5 11269.4 9417.6 4650.0 498.1 996.2 9335.9 11230.8 9421.2 4660.0 499.0 997.9 9339.6 11424.2 9425.1 4670.0 499.8 999.6 9343.9 11904.4 9429.8 4680.0 500.7 1001.3 9347.6 11454.1 9433.7 4690.0 4700.0 501.5 502.4 1003.1 1004.8 9351.4 9355.1 11590.7 11459.3 9437.8 9441.7 4710.0 503.3 1006.5 9358.7 11447.3 9445.6 4720.0 504.1 1008.2 9362.8 11781.1 9450.0 23 of 45 VSfUS1011 Union Oil Company of California Well: Mastodon 6-3-9 DATUM ------ TIME ------ -------- VELOCITY - ------- DEPTH 1 WAY 2 WAY AVERAGE INTERVAL RMS (DGD) (TGD) 4730.0 505.3 1010.5 9361.6 8842.6 9448.7 4740.0 506.2 1012.4 9364.3 10840.3 9451.4 4750.0 507.1 1014.2 9367.0 10840.3 9454.1 4760.0 508.0 1016.0 9369.7 10840.3 9456.8 4770.0 508.9 1017.9 9372.4 10840.6 9459.5 • • 24 of 45 VSfUSl021 Union Oil Compan~of California Well: Mastodon 6-3-9 • • • UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 DATUM ELEVATION 355.80 FT ABOVE SEA LEVEL DATUM CORRECT. VELOCITY 13000.0 FT/SEC 3.2 DATA INTERPOLATED EVERY 2.00 MS BELOW DATUM ------ TIME ------ DATUM -------- - VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS (TGD) (DGD) 2.0 1.0 11.6 11585.3 11585.3 11585.3 4.0 2.0 23.2 11585.3 11585.3 11585.3 6.0 3.0 34.8 11585.3 11585.3 11585.3 8.0 4.0 46.3 11585.3 11585.3 11585.3 10.0 5.0 57.9 11585.3 11585.3 11585.3 12.0 6.0 69.5 11585.3 11585.3 11585.3 14.0 7.0 81.1 11585.3 11585.3 11585.3 16.0 8.0 92.7 11585.3 11585.3 11585.3 18.0 9.0 104.3 11585.3 11585.3 11585.3 20.0 10.0 115.9 11585.3 11585.3. 11585.3 22.0 11.0 127.4 11585.3 11585.3 11585.3 24.0 12.0 139.0 11585.3 11585.3 11585.3 26.0 13.0 150.6 11585.3 11585.3 11585.3 28.0 14.0 162.2 11585.3 11585.3 11585.3 30.0 15.0 173.8 11585.3 11585.3 11585.3 32.0 16.0 185.4 11585.3 11585.3 11585.3 34.0 17.0 197.0 11585.3 11585.3 11585.3 36.0 18.0 208.5 11585.3 11585.3 11585.3 38.0 19.0 220.1 11585.3 11585.3 11585.3 40.0 20.0 230.2 11511.0 10099.7 11515.6 42.0 21.0 239.1 11386.6 8898.6 11404.6 44.0 22.0 248.0 11273.5 8898.6 11302.7 46.0 23.0 256.9 11170.3 8898.6 11208.9 48.0 24.0 265.8 11075.6 8898.6 11122.2 50.0 25.0 274.7 10988.5 8898.6 11041.9 52.0 26.0 283.6 10908.1 8898.6 10967.2 54.0 27.0 292.5 10833.7 8898.6 10897.6 56.0 28.0 301.4 10764.6 8898.6 10832.6 58.0 29.0. 310.3 10700.3 8898.6 10771.7 60.0 30.0 319.2 10640.2 8898.6 10714.5 62.0 31.0 327.8 10575.7 8639.9 10653.9 64.0 32.0 335.9 10497.6 8077.9 10582.9 66.0 33.0 344.0 10424.3 8077.9 10515.7 68.0 34.0 352.1 10355.3 8077.9 10452.2 70.0 35.0 360.2 10290.2 8077.9 10391.9 72.0 36.0 368.2 10228.8 8077.9 10334.6 74.0 37.0 376.3 10170.1 8059.4 10279.7 76.0 38.0 384.2 10111.2 7929.9 10224.8 78.0 39.0 392.2 10055.2 7929.9 10172.4 80.0 40.0 400.1 10002.1 .7929.9 10122.4 82.0 41.0 408.0 9951.6 7929.8 10074.6 84.0 42.0 415.9 9903.4 7929.9 10028.9 86.0 43.0 423.9 9857.5 7929.9 9985.1 88.0 44.0 431.8 9813.7 7929.9 9943.1 90.0 45.0 439.7 9771.9 7929.9 9902.8 92.0 46.0 447.7 9731.8 7929.9 9864.1 94.0 47.0 455.6 9693.5 7929.9 9826.9 96.0 48.0 463.5 9656.7 7929.9 9791.1 98.0 49.0 471.5 9621.5 7929.9 9756.7 100.0 50.0 479.7 9593.4 8214.7 9728.3 102.0 51.0 488.1 9571.6 8481.8 9705.4 104.0 52.0 496.6 9550.6 8481.8 9683.3 25 of 45 vsfusion Union Oil Company of California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS (TGD) (DGD) • 106.0 53.0 505.1 9530.4 8481.7 9662.0 108.0 54.0 513.6 9511.0 8481.8 9641.5 110.0 55.0 522.1 9492.3 8481.8 9621.6 112.0 56.0 530.6 9474.3 8481.8 9602.5 114.0 57.0 539.0 9456.8 8481.8 9583.9 116.0 58.0 547.5 9440.0 8481.8 9566.0 118.0 59.0 556.0 9423.8 8481.8 9548.6 120.0 60.0 564.5 9408.1 8481.8 9531.8 122.0 61.0 573.0 9392.9 8481.7 9515.6 124.0 62.0 581.4 9378.2 8481.8 9499.8 126.0 63.0 589.9 9364.0 8481.8 9484.5 128.0 64.0 598.4 9350.2 8481.8 9469.6 130.0 65.0 606.9 9336.8 8481.8 9455.2 132.0 66.0 615.4 9323.9 8481.8 9441.2 134.0 67.0 623.9 9311.3 8481.8 9427.6 136.0 68.0 632.2 9297.3 8356.8 9412.7 138.0 69.0 640.5 9283.3 8331.5 9398.0 140.0 70.0 648.9 9269.7 8331.5 9383.6 142.0 71.0 657.2 9256.5 8331.5 9369.6 144.0 72.0 665.5 9243.6 8331.5 9355.9 146.0 73.0 673.9 9231.1 8331.5 9342.7 148.0 74.0 682.2 9219.0 8331.5 9329.7 150.0 75.0 690.5 9207.1 8331.5 9317.1 152.0 76.0 698.9 9195.6 8331.5 9304.8 154.0 77.0 707.2 9184.4 8331.5 9292.9 156.0 78.0 715.5. 9173.5 8331.5 9281.2 158.0 79.0 723.9 9162.8 8331.5 9269.7 160.0 80.0 732.0 9150.6 8182.6 9256.9 162.0 81.0 740.2 9138.2 8152.1 9244.1 • 164.0 82.0 748.3 9126.2 8152.1 9231.6 166.0 83.0 756.5 9114.5 8152.0 9219.3 168.0 84.0 764.7 9103.0 8152.1 9207.3 170.0 85.0 772.8 9091.8 8152.0 9195.6 172.0 86.0 781.0 9080.9 8152.1 9184.2 174.0 87.0 789.1 9070.2 8152.1 9173.0 176.0 88.0 797.3 9059.8 8152.0 9162.0 178.0 89.0 805.4 9049.6 8152.1 9151.3 180.0 90.0 813.6 9039.6 8152.1 9140.8 182.0 91.0 821.7 9029.9 8152.0 9130.5 184.0 92.0 829.9 9020.3 8152.1 9120.4 186.0 93.0 838.0 9011.0 8152.1 9110.6 188.0 94.0 846.2 9001.8 8152.0 9100.9 190.0 95.0 854.3 8992.9 8152.1 9091.4 192.0 96.0 862.5 8984.1 8152.0 9082.1 194.0 97.0 870.6 8975.6 8152.1 9073.0 196.0 98.0 878.9 8968.7 8306.8 9065.5 198.0 99.0 887.4 8964.1 8511.8 9060.1 200.0 100.0 896.0 8959.6 8511.8 9054.8 202.0 101.0 904.5 8955.2 8511.9 9049.6 204.0 102.0 913.0 8950.8 8511.8 9044.5 206.0 103.0 921.5 8946.6 8511.8 9039.4 208.0 104.0 930.0 8942.4 8511.8 9034.5 210.0 105.0 938.5 8938.3 8511.9 9029.7 212.0 106.0 947.0 8934.3 8511.8 9024.9 214.0 107.0 955.5 8930.3 8511.8 9020.3 216.0 108.0 964.1 8926.4 8511.9 9015.7 218.0 109.0 972.6 8922.6 8511.8 9011.2 220.0 110.0 980.7 8915.8 8171.6 9003.9 • 222.0 111.0 988.8 8907.7 8013.5 8995.5 224.0 112.0 996.8 8899.7 8013.4 8987.2 26 of 45 VSfUS10Tl Union Oil Company of California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS • (TGD) (DGD) 226.0 113.0 1004.8 8891.8 8013.4 8979.0 228.0 114.0 1012.8 8884.1 8013.4 8971.0 230.0 115.0 1020.8 8876.6 8013.4 8963.1 232.0 -116.0 1028.7 8868.2 7906.9 8954.6 234.0 117.0 1036.5 8858.9 7773.2 8945.1 236.0 118.0 1044.3 8849.6 7773.1 8935.8- 238.0 119.0 1052.0 8840.6 7773.2 8926.7 240.0 120.0 1059.8 8831.7 7773.2 8917.7 242.0 121.0 1067.6 8823.0 7773.2 8908.9 244.0 122.0 1075.4 8814.4 7773.1 8900.1 246.0 123.0 1083.1 8805.9 7773.2 8891.5 248.0 124.0 1090.9 8797.6 7773.2 8883.1 25.0.0 125.0 1098.7 8789.4 7773.2 8874.8 252.0 126.0 1106.4 8781.3 7773.1 8866.6 254.0 127.0 1114.2 8773.4 7773.2 8858.5 256.0 128.0 1122.0 8765.5 7773.2 8850.5 258.0 129.0 1129.7 8757.4 7713.7 8842.3 260.0 130.0 1137.4 8749.0 7670.8 8833.8 262.0 131.0 1145.0 8740.8 7670.8 8825.5 264.0 132.0 1152.7 8732.7 7670.8 8817.4 266.0 133.0 1160.4 8724.7 7670.8 8809.3 268.0 134.0 1168.1 8716.8 7670.8 8801.4 270.0 135.0 1175.7 8709.0- 7663.8 8793.5 272.0 136.0 1183.3 8700.6 7556.2 8785.0- 274.0 137.0 1190.8 8692.2 7556.0 8776.7 276.0 138.0 1198.4 8684.0 7556.2 8768.4 278.0 139.0 1205.9 8675.9 7556.2 8760.3 • 280.0 282.0 140.0 141.0 1213.5 1221.1 8667.9 8660.0 7556.0 7556.2 8752.3 8744.4 284.0 142.0 1228.7 8652.7 7623.5 8737.0 286.0 143.0 1236.4 8646.1 7708.0 8730.2 288.0 144.0 1244.1 8639.6 7708.0 8723.5 290.0 145.0 1251.8 8633.1 7707.9 8716.9 292.0 146.0 1259.5 8626.8 7708.0 8710.4 294.0 147.0 1267.2 8620.6 7708.0 8704.0 296.0 148.0 1274.9 8614.4 7707.9 8697.6 298.0 149.0 1282.6 8608.3 7708.0 8691.4 300.0 150.0 1290.4 8602.4 7728.0 8685.3 302.0 151.0 1298.1 8596.7 7738.4 8679.4 304.0 152.0 1305.8 8591.1 7738.4 8673.5 306.0 153.0 1313.6 8585.5 7738.3 8667.7 308.0 154.0 1321.3 8580.0 7738.4 8662.0 310.0 155.0 1329.1 8574.6 7749.8 8656.4 312.0 156.0 1336.8 8569.4 7761.6 8651.0 314.0 157.0 1344.6 8564.3 7761.5 8645.6 316.0 158.0 1352.4 8559.2 7761.6 8640.3 318.0 159.0 1360.1 8554.2 7761.5 8635.1 320.0 160.0 1367.9 8549.2 7761.6 8629.9 322.0 161.0 1375.6 8544.4 7767.8 8624.8 324.0 162.0 1383.5 8540.3 7886.0 8620.4 326.0 163.0 1391.4 8536.3 7886.1 8616.1 328.0 164.0 1399.3 8532.3 7886.1 8611.8 330.0 165..0 1407.2 8528.4 7886.0 8607.6 332.0 166.0 1415.1 8524.5 7886.1 8603.5 334.0 167.0 1423.0 8520.7 7886.0 8599.3 336.0 168.0 1430.8 8516.9 7886.1 8595.3 • 338.0 340.0 169.0 170.0 1438.7 1446.6 8513.2 8509.5 7886.0 7886.1 8591.3 8587.3 342.0 171.0 1454.5 8505.9 7886.0 8583.3 344.0 172.0 1462.4 8502.3 7886.1 8579.4 27 of 45 VSfUS1011 Union Oil Compan~of California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS (TGD) (DGD) • 346.0 173.0 1470.3 8498.7 7886.0 8575.6 348.0 174.0 1478.4 8496.5 8115.8 8573.0 350.0 175.0 1486.9 8496.6 8505.6 8572.6 352.0 176.0 1495.4 8496.6 8505.6 8572.3 354.0 177.0 1503.9 8496.7 8505.6 8571.9 356.0 178.0 1512.4 8496.7 8505.5 8571.5 358.0 179.0 1520.9 8496.8 8505.6 8571.2 360.0 180.0 1529.4 8496.7 8480.3 8570.7 362.0 181.0 1537.9 8496.4 8454.2 8570.0 364.0 182.0 1546.3 8496.2 8454.2 8569.4 366.0 183.0 1554.8 8496.0 8454.2 8568.8 368.0 184.0 1563.2 8495.8 8454.2 8568.1 370.0 185.0 1571.7 8495.5 8454.2 8567.5 372.0 186.0 1580.2 8495.8 8537.5 8567.4 374.0 187.0 1588.8 8496.3 8598.1 8567.5 376.0 188.0 1597.4 8496.8 8598.1 8567.7 378.0 189.0 1606.0 8497.4 8598.1 8567.9 380.0 190.0 1614.6 8497.9 8598.1 8568.0 382.0 191.0 1623.2 8498.4 8598.1 8568.2 384.0 192.0 1631.8 8498.9 8584.2 8568.3 386.0 193.0 1640.4 8499.3 8580.0 8568.3 388.0 194.0 1648.9 8499.7 8579.8 8568.4 390.0 195.0 1657.5 8500.1 8580.0 8568.4 392.0 196.0 1666.1 8500.5 8580.0 8568.5 394.0 197.0 1674.7 8500.9 8580.0 8568.6 396.0 198.0 1682.6 8498.2 7956.1 8565.6 398.0 199.0 1690.6 8495.2 7914.2 8562.4 400.0 402.0 200.0 201.0 1698.5 1706.4 8492.3 8489.5 7914.3 7914.3 8559.3 8556.2 • 404.0 202.0 1714.3 8486.6 7914.3 8553.2 406.0 203.0 1722.2 8483.8 7914.2 8550.1 408.0 204.0 1730.1 8481.0 7914.3 8547.1 410.0 205.0 1738.0 8478.2 7914.3 8544.1 412.0 206.0 1746.0 8475.5 7914.2 8541.2 414.0 207.0 1753.9 8472.8 7914.3 8538.3 416.0 208..0 1761.8 8470.1 7914.3 8535.4 418.0 209.0 1769.7 8467.5 7914.2 8532.5 420.0 210.0 1777.6 8464.8 7914.3 8529.7 422.0 211.0 1785.5 8462.2 7914.3 8526.9 424.0 212.0 1793.4 8459.6 7914.2 8524.1 426.0 213.0 1801.4 8457.1 7914.3 8521.3 428.0 214.0 1809.3 8454.5 7914.3 8518.6 430.0 215.0 1817.2 8452.0 7914.3 8515.9 432.0 216.0 1825.1 8449.5 7914.2 8513.2 434.0 217.0 1833.0 8447.1 7914.3 8510.5 436.0 218.0 1840.9 8444.6 7914.3 8507.9 438.0 219.0 1848.8 8442.2 7914.2 8505.3 440.0 220.0 1856.8 8439.8 7914.3 8502.7 442.0 221.0 1864.7 8437.4 7914.3 8500.1 444.0 222.0 1872.6 8435.1 7914.2 8497.6 446.0 223.0 1878.0 8421.4 5383.2 8486.1 448.0 224.0 1887.2 8425.1 9256.7 8489.7 450.0 225.0 1896.4 8428.5 9199.6 8493.0 452.0 226.0 1905.9 8433.1 9447.5 8497.5 454.0 227.0 1915.5 8438.2 9590.6 8502.6 456.0 228.0 1924.9 8442.4 9415.9 8506.8 458.0 460.0 229.0 230.0 1933.8 1942.6 8444.6 8446.1 8937.0 8795.8 8508.8 8510.0 • 462.0 231.0 1951.4 8447.7 8814.7 8511.4 464.0 232.0 1960.5 8450.5 9101.6 8514.0 28 of 45 VSfUS10I1 Union Oil Company o California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS • (TGD) (DGD) 466.0 233.0 1969.6 8453.1 9046.4 8516.4 468.0 234.0 1978.5 8455.1 8933.2 8518.2 470.0 235.0 1987.5 8457.6 9023.6 8520.4 472.0 236.0 1996.6 8460.3 9098.8 8522.9 474.0 237.0 2006.0 8464.1 9357.9 8526.6 476.0 238.0 2015.1 8467.0 9152.5 8529.3 478.0 239.0 2024.6 8471.1 9465.7 8533.5 480.0 240.0 2033.7 8473.9 9127.3 8536.0 482.0 241.0 2043.2 8478.0 9463.5 8540.1 484.0 242.0 2052.4 8481.1 9235.0 8543.1 486.0 243.0 2061.6 8483.7 9121.3 8545.5 488.0 244.0 2070.7 8486.5 9152.3 8548.1 490.0 245.0 2080.3 8491.1 9623.5 8552.8 492.0 246.0 2089.4 8493.4 9052.2 8554.9 494.0 247.0 2098.6 8496.3 9201.2 8557.6 496.0 248.0 2107.8 8499.2 9217.0 8560.3 498.0 249.0 2117.1 8502.2 9259.5 8563.3 500.0 250.0 2126.5 8506.0_ 9449.7 8567.0 502.0 251.0 2135.6 8508.3 9085.4 8569.1 504.0 252.0 2144.2 8508.7 8597.9 8569.2 506.0 253.0 2153.3 8511.2 9151.1 8571.6 508.0 254.0 2162.2 8512.8 8900.6 8572.9 510.0 255.0 2171.4 8515.5 9208.7 8575.5 512.0 256.0 2180.3 8516.7 8829.8 8576.5 514.0 257.0 2189.4 8519.1 9123.3 8578.7 516.0 258.0 2198.6 8521.6 9167.0 8581.1 518.0 259.0 2207.7 8524.1 9168.7 8583.4 • 520.0 522.0 260.0 261.0 2216.8 2225.8 8526.2 8528.1 9075.0 9026.9 8585.4 8587.1 524.0 262.0 2234.9 8530.3 9085.4 8589.1 526.0 263.0 2244.1 8532.6 9146.7 8591.3 528.0 264.0 2253.3 8535.1 9182.9 8593.6 530.0 265.0 2262.6 8538.0 9303.7 8596.4 532.0 266.0 2271.9 8541.0 9334.2 8599.3 534.0 267.0 2281.7 8545.6 9792.2 8604.0 536.0 268.0 2291.1 8548.9 9420.2 8607.2 538.0 269.0 2299.7 8549.1 8611.6 8607.2 540.0 270.0 2309.3 8552.9 9577.9 8611.0 542.0 271.0 2319.0 8557.3 9719.7 8615.4 544.0 272.0 2328.6 8561.2 9625.2 8619.3 546.0 273.0 2338.0 8564.0 9345.2 8622.1 548.0 274.0 2347.4 8567.2 9413.6 8625.1 550.0 275.0 2356.7 8569.7 9263.9 8627.5 552.0 276.0 2366.0 8572.4 9320.1 8630,1 554.0 277.0 2375.5 8575.9 9551.8 8633.6 556.0 278.0 2385.1 8579.6 9580.6 8637.2 558.0 279.0 2394.6 8582.8 9471.9 8640.4 560.0 280.0 2404.5 8587.4 9890.9 8645.2 562.0 281.0 2414.2 8591.4 9713.9 86.49.2 564.0 282.0 2423.9 8595.3 9676.8 8653.1 566.0 283.0 2433.0 8597.2 9140.1 8654.8 568.0 284.0 2442.1 8599.1 9132.6 8656.6 570.0 285.0 2451.4 8601.3 9216.3 8658.6 572.0 286.0 2460.8 8604.2 9448.7 8661.5 574.0 287.0 2470.1 8606.8 9339.6 8663.9 576.0 288.0 2480.1 8611.4 9941.4 8668.7 • 578.0 580.0 289.0 290.0 2489.7 2499.1 8614.7 8617.7 9569.8 9478.8 8672.0 8674.9 582.0 291.0 2508.9 8621.5 9719.0 8678.7 584.0 292.0 2518.5 8625.0 9650.6 8682.2 29 of 45 VSfLiS1011 Union Oil Company of California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS (TGD) (DGD) • 586.0 293.0 2528.1 8628.3 9599.1 8685.5 588.0 294.0 2537.8 8632.0 9697.5 8689.1 590.0 295.0 2547.4 8635.3 9596.4 8692.4 592.0 296.0 2557.8 8641.1 10366.5 8698.6 594.0 297.0 2567.1 8643.4 9322.5 8700.7 596.0 298.0 2576.5 8646.0 9417.5 8703.2 598.0 299.0 2586.2 8649.6 9712.4 8706.8 600.0 300.0 2596.2 8653.9 9956.1 8711.3 602.0 301.0 2605.5 8656.0 9278.8 8713.2 604.0 302.0 2615.3 8659.9 9846.7 8717.2 606.0 303.0 2625.2 8664.1 9928.5 8721.5 608.0 304.0 2634.7 8666.6 9426.5 8723.9 610.0 305.0 2643.8 8668.3 9178.7 8725.4 612.0 306.0 2653.3 8670.8 9436.0 8727.9 614.0 307.0 2662.3 8672.0 9029.1 8728.9 616.0 308.0 2671.4 8673..5 9135.0 8730.2 618.0 309.0 2681.1 8676.6 9639.6 8733.3 620.0 310.0 2690.6 8679.2 9480.0 8735.8 622.0 311.0 2699.8 8681.0 9250.2 8737.5 624.0 312.0 2709.5 8684.3 9700.0 8740.8 626.0 313.0 2719.1 8687.2 9588.6 8743.6 628.0 314.0 2728.9 8690.8 9817.6 8747.2 630.0 315.0 2738.7 8694.4 9827.9 8750.9 632.0 316.0 2748.5 8697.9 9800.3 8754.4 634.0 317.0 2758.9 8703.0 10322.3 8759.8 636.0 318.0 2768.5 8706.0 9663.3 8762.8 638.0 319.0 2777.9 8708.3 9416.0 8764.9 640.0 642.0 320.0 321.0 2787.7 2797.7 8711.6 8715.5 9767.8 9982.2 8768.2 8772.3 • 644.0 322.0 2807.0 8717.5 9351.3 8774.1 646.0 323.0 2816.7 8720.4 9648.9 8777.0 648.0 324.0 2826.2 8722.8 9500.0 8779.3 650.0 325.0 2835.5 8724.7 9345.2 8781.1 652.0 326.0 2845.0 8727.0 9460.2 8783.2 654.0 327.0 2854.3 8728.7 9294.4 8784.8 656.0 328.0 2864.1 8732.1 9845.5 8788.3 658.0 329.0 2874.2 8736.2 10085.0 8792.5 660.0 330.0 2884.3 8740.2 10056.2 8796.6 662.0 331.0 2893.8 8742.7 9555.7 8799.0 664.0 332.0 2903.7 8746.0 9836.2 8802.3 666.0 333.0 2913.5 8749.1 9785.4 8805.4 668.0 334.0 2922.9 8751.2 9433.6 8807.4 670.0 335.0 2932.2 8753.0 9353.3 8809.1 672.0 336.0 2941.6 8754.9 9409.7 8810.9 674.0 337.0 2950.9 8756.3 9221.7 8812.1 676.0 338.0 2959.9 8757.1 9044.4 8812.8 678.0 339.0 2969.0 8758.1 9081.5 8813.7 680.0 340.0 2978.7 8761.0 9749.8 8816.5 682.0 341.0 2988.2 8763.1 9468.0 8818.5 684.0 342.0 2997.9 8765.8 9699.7 8821.2 686.0 343.0 3007.0 8766.7 9069.8 8822.0 688.0 344.0 3016.0 8767.4 9008.1 8822.5 690.0 345.0 3025.7 8770.2 9712.6 8825.2 692.0 346.0 3035.4 8772.9 9705.3 8827.9 694.0 347.0 3045.2 8775.7 9753.4 8830.7 696.0 348.0 3054.7 8778.0 9580.6 8833.0 698.0 700.0 349.0 350.0 3064.4 3074.0 8780.4 8782.7 9628.7 9586.4 8835.3 8837.6 • 702.0 351.0 3083.7 8785.5 9740.7 8840.3 704.0 352.0 3093.3 8787.8 9616.0 8842.6 30 of 45 VSfUS1021 Union Oil Company of California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS • (TGD) (DGD) 706.0 353.0 3102.9 8790.0 9543.5 8844.6 708.0 354.0 3112.4 8792.1 9541.7 8846.7 710.0 355.0 3122.2 8794.9 9774.4 8849.4 712.0 356.0 3131.6 8796.6 9409.7 8851.1 714.0 357.0 3140.6 8797.2. 9012.0 8851.5 716.0 358.0 3149.5 8797.5 8916.3 8851.7 718.0 359.0 3159.3 8800.3 9.786.9 8854.4 720.0 360.0 3169.4 8804.0 10123.5 8858.2 722.0 361.0 3179.0 8806.2 9603.3 8860.4 724.0 362.0 3188.6 8808.2 9533.7 8862.3 726.0 363.0 3197.8 8809.4 9250.0 8863.4 728.0 364.0 3207.2 8811.1 9413.8 8864.9 730.0 365.0 3216.6 8812.7 9392.6 8866.4 732.0 366.0 3226.2 8814.6 9542.7 8868.4 734.0 367.0 3235.5 8816.1 9348.1 8869.7 736.0 368.0 3244.2 8815.8 8713.6 8869.3 738.0 369.0 3253.5 8817.0 9256.8 8870.4 740.0 370.0 3263.0 8818.9 9531.7 8872.2 742.0 371.0 3272.9 8821.9 9904.8 8875.2 744.0 372.0 3282.9 8825.0 9979.7 8878.3 746.0 373.0 3292.8 8827.9 9927.7 8881.3 748.0 374.0 3302.5 8830.3 9714.8 8883.6 750.0 375.0 3311.7 8831.3 9200.7 8884.5 752.0 376.0 3321.4 8833.5 9659.4 8886.6 754.0 377.0 3330.7 8834.7 9298.3 8887.7 756.0 378.0 3340.1 8836.2 9370.6 8889.1 758.0 379.0 3349.5 8837.6 9386.0 8890.4 • 760.0 762.0 380.0 381.0 3358.7 3367.9 8838.7 8839.7 9261.7 9214.6 8891.4 8892.3 764.0 382.0 3377.8 8842.3 9838.9 8894.9 766.0 383.0 3387.2 8843.9 9456.8 8896.4 768.0 384.0 3396.2 8844.3 8980.2 8896.6 770.0 385.0 3406.0 8846.8 9832.0 8899.2 772.0 386.0 3416.2 8850.3 10167.0 8902.7 774.0 387.0 3426.0 8852.6 9758.1 8905.0 776.0 388.0 3435.8 8855.3 9884.3 8907.7 778.0 389.0 3446.2 8859.1 10335.4 8911.6 780.0 390.0 3456.2 8862.0 9986.6 8914.5 782.0 391.0 3466.4 8865.5 10223.1 8918.1 784.0 392.0 3476.5 8868.6 10114.0 8921.4 786.0 393.0 3486.7 8872.1 10234.6 8925.0 788.0 394.0 3497.0 8875.7 10282.0 8928.7 790.0 395.0 3507.7 8880.3 10684.3 8933.6 792.0 396.0 3518.3 8884..6 10578.4 8938.1 794.0 397.0 3528.3 8887.5 10061.3 8941.1 796.0 398.0 3538.6 8891.1 10296.9 8944.8 798.0 399.0 3549.3 8895.4 10637.2 8949.4 800.0 400.0 3559.9 8899.7 10613.0 8954.0 802.0 401.0 3570.5 8903.9 10557.1 8958.3 804.0 402.0 3580.9 8907.6 10419.9 8962.2 806.0 403.0 3591.2 8911.2 10345.2 8965.9 808.0 404.0 3601.7 8915.1 10481.9 8970.0 810.0 405.0 3612.1 8918.8 10418.5 8973.9 812.0 406.0 3622.5 8922.3 10347.4 8977.5 814.0 407.0 3632.9 8926.0 10410.6 8981.3 816.0 408.0 3643.4 8929.9 10526.4 8985.4 • 818.0 820.0 409.0 410.0 3654.6 3665.2 8935.5 8939.4 11218.5 10531.5 8991.6 8995.6 822.0 411.0 3676.0 8943.9 10804.2 9000.5 824.0 412.0 3686.6 8948.0 10612.5 9004.7 31 of 45 VSfLiSlOrl Union Oil Company of California Well: Mastodon 6-3-9 ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS (TGD) (DGD) • 826.0 413.0 3696.4 8950.2 9876.7 9007.0 828.0 414.0 3706.7 8953.4 10264.2 9010.2 830.0 415.0 3717.5 8957.9 10837.4 9015.1 832.0 416.0 3728.6 8962.9 11010.5 9020.4 834.0 417.0 3739.1 8966.7 10559.1 9024.4 836.0 418.0 3749.4 8969.9 10301.0 9027.7 83.8.0 419.0 3760.2 8974.1 10743.2 9032.1 840.0 420.0 3770.8 8978.0 10611.6 9036.2 842.0 421.0 3781.7 8982.6 10905.5 9041.1 844.0 422.0 3793.0 8988.2 11331.5 9047.2 846.0 423.0 3803.9 8992.6 10851.1 9051.9 848.0 424.0 3814.7 8997.0 10868.2 9056.6 850.0 425.0 3826.0 9002.5 11316.7 9062.6 852.0 426.0 3837.2 9007.5 11140.6 9068.1 854.0 427.0 3847.7 9010.9 10472.4 9071.6 856.0 428.0 3858.4 9015.1 10788.6 9076.0 858.0 429.0 3869.2 9019.1 10760.5 9080.3 860.0 430.0 3880.2 9023.7 10985.6 9085.2 862.0 431.0 3890.8 9027.3 10592.0 9089.0 864.0 432.0 3901.3 9030.8 10521.2 9092.5 866.0 433.0 3912.1 9034.9 10797.9 9096.8 868.0 434.0 3922.6 9038.3 10529.5 9100.4 870.0 435.0 3933.6 9042.8 10993.7 9105.2 872.0 436.0 3944.2 9046.3 10548.1 9108.8 874.0 437.0 3955.1 9050.6 10926.5 9113.4 876.0 438.0 3965.5 9053.8 10446.3 9116.6 878.0 439.0 3976.6 9058.3 11027.6 9121.4 880.0 882.0 440.0 441.0 3987.8 3999.1 9063.3 9068.3 11262.0 11289.3 9126.9 9132.3 • 884.0 442.0 4010.1 9072.7 10995.6 9137.0 886.0 443.0 4020.9 9076.5 10761.5 9141.0 888.0 444.0 4032.2 9081.6 11342.5 9146.5 890.0 445.0 4043.3 9086.2 11124.3 9151.5 892.0 446.0 4054.2 9090.1 10856.4 9155.6 894.0 447.0 4065.4 9094.8 11184.3 9160.7 896.0 448.0 4076.7 9099.7 11277.1 9165.9 898.0 449.0 4087.5 9103.5 10814.0 9169.9 900.0 450.0 4098.6 9108.0 11114.3 9174.7 902.0 451.0 4110.2 9113.6 11652.3 9181.0 904.0 452.0 4121.6 9118.5 11316.9 9186.2 906.0 453.0 4133.1 9123.9 11559.6 9192.1 908.0 454.0 4144.4 9128.6 11282.7 9197.3 910.0 455.0 4156.1 9134.2 11667.0 9203.4 912.0 456.0 4167.5 9139.4 11470.7 9209.0 914.0 457.0 4178.8 9144.0 11265.6 9214.0 916.0 458.0 4190.1 9148.7 11300.8 9219.1 918.0 459.0 4201.2 9152.9 11074.7 9223.5 920.0 460.0 4212.3 9157.2 11148.4 9228.1 922.0 461.0 4223.5 9161.6 11148.4 9232.7 924.0 462.0 4234.5 9165.7 11048.8 9237.1 926.0 463.0 4246.5 9171.7 11960.9 9243.8 928.0 464.0 4258.3 9177.3 11788.6 9250.0 930.0 465.0 4270.2 9183.3 11945.8 9256.7 932.0 466.0 4282.2 9189.3 12008.3 9263.5 934.0 467.0 4294.2 9195.3 11990.7 9270.2 936.0 468.0 4305.8 9200.5 11587.4 9275.7 938.0 940.0 469.0 470.0 4317.6 4329.1 9206.0 9210.9 11809.1 11491.2 9281.9 9287.1 • 942.0 471.0 4340.6 9215.7 11490.7 9292.4 944.0 472.0 4352.3 9221.0 11685.5 9298.1 32 of 45 VSfL1S10I1 Union Oil Company of California Well: Mastodon 6-3-9 • • • ------ TIME ------ DATUM --------- VELOCITY -- -------- 2 WAY 1 WAY DEPTH AVERAGE INTERVAL RMS (TGD) (DGD) 946.0 473.0 4363.5 9225.2 11248.0 9302.6 948.0 474.0 4374.8 9229.6 11307.6 9307.3 950.0 475.0 4386.5 9234.7 11623.5 9312.8 952.0 476.0 4396.8 9237.0 10325.2 9315.0 954.0 477.0 4407.7 9240.5 10909.7 9318.7 956.0 478.0 4419.3 9245.5 11641.1 9324.1 958.0 479.0 4431.0 9250.5 11640.1 9329.6 960.0 480.0 4442.7 9255.7 11760.7 9335.3 962.0 481.0 4454.4 9260.7 11654.8 9340.7 964.0 482.0 4466.2 9266.0 11796.4 9346.5 966.0 483.0 4478.0 9271.2 11794.4 9352.2 968.0 484.0 4489.6 9276.1 11632.8 9357.5 970.0 485.0 4501.6 9281.6 11928.2 9363.5 972.0 486.0 4513.3 9286.7 11765.6 9369.1 974.0 487.0 4525.7 9293.1 12422.9 9376.4 976.0 488.0 4537.9 9298.9 12115.7 9382.8 978.0 489.0 4549.0 9302.6 11122.1 9386.7 980.0 490.0 4559.6 9305.3 10604.5 9389.4 982.0 491.0 4570.4 9308.4 10852.5 9392.6 984.0 492.0 4581.9 9312.9 11490.2 9397.3 986.0 493.0 4593.3 9317.0 11360.8 9401.7 988.0 494.0 4604.5 9320.8 11173.3 9405.6 990.0 495.0 4615.4 9324.1 10974.1 9409.1 992.0 496.0 4626.7 9327.9 11218.3 9413.1 994.0 497.0 4637.9 9331.7 11213.4 9417.0 996.-0 498.0 4649.1 9335.6 11271.5 .9421.1 998.0 499.0 4660.6 9339.9 11453.6 9425.6 1000.0 500.0 4672.4 9344.7 11766.6 9430.9 1002.0 501.0 4683.9 9349.1 11560.5 9435.6 1004.0 502.0 4695.5 9353.6 11587.9 9440.4 1006.0 503.0 4706.8 9357.5 11300.3 9444.4 1008.0 504.0 4718.6 9362.2 11753.4 9449.6 1010.0 505.0 4727.3 9360.9 8697.3 9448.2 1012.0 506.0 4738.1 9363.8 10840.3 9451.1 1014.0 507.0 4748.9 9366.7 10840.8 9454.1 1016.0 508.0 4759.8 9369.6 10840.3 9457.0 1018.0 509.0 4770.6 9372.5 10840.3 9459.9 33 of 45 vSfusion Union Oil Company of California Well: Mastodon 6-3-9 UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 3.3 TIME/DEPTH INFORMATION • GEOPHONE REFERENCE ELEVATION 380.50 FT ABOVE SEA LEVEL DATUM ELEVATION 355.80 FT ABOVE SEA LEVEL DATUM CORRECT. VELOCITY 13000.0 FT/SEC ALL TIMES ARE TWO-WAY TIMES CORRECTED TO DATUM INTERPOLATED EVERY 1.00 MS TIME 0 1 2 3 4 5 6 7 8 9 0 6 12 17 23 29 35 41 46 52 10 58 64 70 75 81 87 93 98 104 110 20 116 122 127 133 139 145 151 156 162 168 30 174 180 185 191 197 203 209 214 220 226 40 230 235 239 2.44 248 252 257 261 266 270 50 275 279 284 288 293 297 301 306 310 315 60 319 324 328 332 336 340 344 348 352 356 70 360 364 368 372 376 380 384 388 392 396 80 400 404 408 412 416 420 424 428 432 436 90 440 444 448 452 456 460 464 467 471 475 100 480 484 488 492 497 501 505 509 514 518 110 522 526 531 535 539 543 548 552 556 560 120 564 569 573 577 581 586 590 594 598 603 130 607 611 615 620 624 628 632 636 641 645 140 649 653 657 661 666 670 674 678 682 686 150 691 695 699 703 707 711 716 720 724 728 160 170 732 773 736 777. 740 781 744 785 748 789 752 793 757 797 761 801 765 805 769 809 • 180 814 818 822 826 830 834 838 842 846 850 190 854 858 862 867 871 875 879 883 887 892 200 896 900 904 909 913 917 921 926 930 934 210 939 943 947 951 956 960 964 968 973 977 220 981 985 989 993 997 1001 1005 1009 1013 1017 230 1021 1025 1029 1033 1036 1040 1044 1048 1052 1056 240 1060 1064 1068 1071 1075 1079 1083 1087 1091 1095 250 1099 1103 1106 1110 1114 1118 1122 1126 1130 1134 260 1137 1141 1145 1149 1153 1157 1160 1164 1168 1172 270 1176 1179 1183 1187 1191 1195 1198 1202 1206 1210 280 1214 1217 1221 1225 1229 1233 1236 1240 1244 1248 290 1252 1256 1260 1263 1267 1271 1275 1279 1283 1286 300 1290 1294 1298 1302 1306 1310 1314 1317 1321 1325 310 1329 1333 1337 1341 1345 1348 1352 1356 1360 1364 320 1368 1372 1376 1380 1384 1387 1391 1395 1399 1403 330 1407 1411 1415 1419 1423 1427 1431 1435 1439 1443 340 1447 1451 1455 1458 1462 1466 1470 1474 1478 1483 350 1487 1491 1495 1500 1504 1508 1512 1517 1521 1525 360 1529 1534 1538 1542 1546 1551 1555 1559 1563 1567 370 1572 1576 1580 1585 1589 1593 1597 1602 1606 1610 380 1615 1619 1623 1627 1632 1636 1640 1645 1649 1653 390 1658 1662 1666 1670 1675 1679 1683 1687 1691 1695 400 1698 1702 1706 1710 1714 1718 1722 1726 1730 1734 410 1738 1742 1746 1750 1754 1758 1762 1766 1770 1774 420 1778 1782 1786 1789 1793 1797 1801 1805 1809 1813 430 1817 1821 1825 1829 1833 1837 1841 1845 1849 1853 440 1857 1861 1865 1869 1873 1875 1878 1883 1887 1892 450 1896 1901 1906 1911 1915 1920 1925 1929 1934 1938 460 1943 1947 1951. 1956 1961 1965 1970 1974 1979 1983 • 470 1988 1992 1997 2001 2006 2011 2015 2020 2025 2029 480 2034 2038 2043 2048 2052 2057 2062 2066 2071 2075 34 of 45 VSfUS10I1 Union Oil Company of California Well: Mastodon 6-3-9 TIME • 490 500 2080 2127 2085 2131 2089 2136 2094 2140 2099 2144 2103 2149 2108 2153 2112 2158 2117 2162 2122 2167 510 2171 2176 2180 2185 2189 2194 2199 2203 2208 2212 520 2217 2221 2226 2230 2235 2239 2244 2249 2253 2258 530 2263 2267 2272 2277 2282 2286 2291 2296 2300 2304 540 2309 2314 2319 2324 2329 2333 2338 2343 2347 2352 550 2357 2361 2366 2371 2376 2380 2385 2390 2395 2399 560 2404 2409 2414. 2419 2424 2428 2433 2438 2442 2447 570 2451 2456 2461 2466 2470 2475 2480 2485 2490 2494 580 2499 2504 2509 2514 2519 2523 2528 2533 2538 2543 590 2547 2552 2558 2562 2567 2572 2577 2581 2586 2591 600 2596 2601 2605 2610 2615 2620 2625 2630 2635 2639 610 2644 2649 2653 2658 2662 2667 2671 2676 2681 2686 620 2691 2695 2700 2705 2710 2714 2719 2724 2729 2734 630 2739 2744 2749 2754 2759 2764 2769 2773 2778 2783 640 2788 2793 2798 2802 2807 2812 2817 2821 2826 2831 650 2836 2840 2845 2850 2854 2859 2864 2869 2874 2879 660 2884 2889 2894 2899 2904 2909 2913 2918 2923 2927 670 2932 2937 2942 2946 2951 2955 2960 2964 2969 2974 680 2979 2984 2988 2993 2998 3002 3007 3012 3016 3021 690 .3026 3031 3035 3040 3045 3050 3055 3060 3064 3069 700 3074 3079 3084 3089 3093 3098 3103 3108 3112 3117 710 3122 3127 3132 3136 3141 3145 3150 3154 3159 3164 720 3169 3174 3179 3184 3189 3193 3198 3203 3207 3212 730 3217 3221 3226 3231 3236 3240 3244 3249 3253 .3258 740 3263 3268 3273 3278 3283 3288 3293 3298 3303 3307 750 3312 3317 3321 3326 3331 3335 3340 3345 3349 3354 760 3359 3363 3368 3373 3378 3383 3387 3392 3396 3401 770 3406 3411 3416 3421 3426 3431 3436 3441 3446 3451 • 780 790 3456 3508 3461 3513 3466 3518 3471 3523 3477 3528 3482 3533 3487 3539 3492 3544 3497 3549 3502 3555 800 3560 3565 3570 3576 3581 3586 3591 3596 3602 3607 810 3612 3617 3622 3628 3633 3638 3643 3649 3655 3660 820 3665 3670 3676 3681 3687 3691 3696 3701 3707 3712 830 3718 3723 3729 3734 3739 3744 3749 3755 3760 3765 840 3771 3776 3782 3788 3793 3798 3804 3809 3815 3820 850 3826 3832 3837 3842 3848 3853 3858 3864 3869 3875 860 3880 3885 3891 3896 3901 3907 3912 3917 3923 3928 870 3934 3939 3944 3950 3955 3960 3966 3971 3977 3982 880 3988 3993 3999 4005 4010 4015 4021 4027 4032 4038 890 4043 4049 4054 4060 4065 4071 4077 4082 4087 4093 900 4099 4104 4110 4116 4122 4127 4133 4139 4144 4150 910 4156 4162 4168 4173 4179 4184 4190 4196 4201 4207 920 4212 4218 4223 4229 4235 .4240 4246 4252 4258 4264 930 4270 4276 4282 4288 4294 4300 4306 4312 4318 4323- 940 4329 4335 4341 4346 4352 4358 4364 4369 4375 4381 950 4386 4391 4397 4402 4408 4414 4419 4425 4431 4437 960 4443 4449 4454 4461 4466 4472 4478 4484 4490 4496 970 4502 4507 4513 4520 4526 4532 4538 4544 4549 4554 980 4560 4565 4570 4576 4582 4588 4593 4599 4604 .4610 990 4615 4621 4627 4632 4638 4644 4649 4655 4661 4667 1000 4672 4678 4684 4690 4696 4701 4707 4713 4719 4724 1010 4727 4733 4738 4744 4749 4754 4760 4765 4771 • 35 of 45 VSfUS1021 Union Oil Company of California Well: Mastodon 6-3-9 UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 3.4 DEPTH/TIME INFORMATION GEOPHONE REFERENCE ELEVATION 380.50 FT ABOVE SEA LEVEL DATUM ELEVATION 355.80 FT ABOVE SEA LEVEL DATUM CORRECT. VELOCITY 13000.0 FT/SEC ALL TIMES ARE TWO-WAY TIMES CORRECTED TO DATUM INTERPOLATED EVERY 10.00 FT DEPTH 0 10 20 30 40 50 60 70 80 90 0 2 3 5 7 9 10 12 14 16 100 17 19 21 22 24 26 28 29 31 33 200 35 36 38 40 42 44 47 49 51 53 300 56 58 60 63 65 67 70 72 75 77 400 80 83 85 88 90 93 95 98 100 102 500 105 107 110 112 114 117 119 121 124 126 600 128 131 133 135 138 140 143 145 147 150 700- 152 155 157 159 162 164 167 169 172 174 800 177 179 182 184 186 189 191 194 196 199 900 201 203 206 208 210 213 215 217 220 222 1000 225 227 230 232 235 237 240 243 245 248 1100 250 253 255 258 261 263 266 269 271 274 1200 276 279 282 284 287 290 292 295 297 300 1300 302 305 308 310 313 315 318 321 323 326 1400 328 331 333 336 338 341 343 346 348 351 1500 353 355 358 360 363 365 367 370 372 374 1600 1700 377 400 379 403 381 405 384 408 386 410 388 413 391 416 393 418 395 421 398 423 • 1800 426 428 431 433 436 438 441 443 446 449 1900 451 453 455 457 459 462 464 466 468 471 2000 473 475 477 479 481 483 486 488 490 492 2100 494 496 499 501 503 505 507 510 512 514 2200 516 518 521 523 525 527 529 532 534 536 2300 538 540 542 544 546 549 551 553 555 557 2400 559 561 563 565 568 570 572 574 576 578 2500 580 582 584 586 588 591 592 595 597 599 2600 601 603 605 607 609 611 613 616 618 620 2700 622 624 626 628 630 632 634 636 638 640 2800 642 645 647 649 651 653 655 657 659 661 2900 663 665 667 670 672 674 676 678 680 682 3000 684 687 689 691 693 695 697 699 701 703 3100 705 708 710 712 714 716 718 720 722 724 3200 726 729 731 733 735 737 739 741 743 745 3300 747 750 752 754 756 758 760 762 764 767 3400 769 771 773 775 777 779 781 783 785 787 3500 789 790 792 794 796 798 800 802 804 806 3600 808 810 812 813 815 817 819 821 823 825 3700 827 829 830 832 834 836 838 840 842 843 3800 845 847 849 851 853 854 856 858 860 862 3900 864 866 867 869 871 873 875 877 879 880 4000 882 884 886 888 889 891 893 895 897 898 4100 900 902 904 905 907 909 911 912 914 916 4200 918 920 921 923 925 927 928 930 932 933 4300 935 937 938 940 942 944 945 947 949 951 4400 953 954 956 958 960 961 963 965 966 968 4500 4600 970 987 971 989 973 991 975 993 976 994 978 996 980 998 982 1000 984 1001 985 1003 • 4700 1005 1007 1008 1011 1012 1014 1016 1018 36 of 45 VSfUS1011 Union Oil Com,~any of California Well: Mastodon 6-3-9 UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 • 3.5 DEPTH / TIME INFORMATION TABLE DATUM ELEVATION 355.80 FT ABOVE SEA LEVEL DATUM CORRECT. VELOCITY 13000.0 FT/SEC * = NOT USED IN VELOCITY COMPUTATIONS MEASURED VERTICAL DATUM RAW 1-WAY 2-WAY GEOPHONE GEOPHONE GEOPHONE PICK VERTICAL VERTICAL DEPTH DEPTH DEPTH TIME TIME TIME (FT) (FT) (FT) (MS) (MS) (MS) 250.0 250.0 225.3 29.01 19.45 38.89 300.0 300.0 275.3 32.71 24.25 48.50 350.0 350.0 325.3 38.64 30.68 61.37 380.5 380.5 355.8 41.86 34.30 68.61 400.0 400.0 375.3 44.24 36.87 73.75 450.0 450.0 425.3 49.78 42.98 85.96 500.0 500.0 475.3 55.82 49.48 98.97 550.0 550.0 525.3 61.68 55.79 111.59 600.0 600.0 575.3 67.31 61.84 123.69 650.0 650.0 625.3 72.21 67.17 134.34 700.0 700.0 675.3 77.48 72.79 145.58 750.0 750.0 725.3 83.59 79.17 158.34 800.0 800.0 775.3 89.94 85.75 171.49 850.0 850.0 825.3 94.98 91.05 182.11 900.0 900.0 875.3 101.30 97.57 195.14 950.0 950.0 925.3 107.09 103.55 207.11 • 1000.0 1000.0 975.3 112.67 109.32 218.63 1050.0 1050.0 1025.3 118.76 115.56 231.11 1100.0 1100.0 1075.3 125.34 122.27 244.54 1150.0 1150.0 1125.3 131.36 128.42 256.84 1200.0 1200.0 1175.3 137.76 134.94 269.88 1250.0 1250.0 1225.3 144.27 141.56 283.11 1310.0 1310.0 1285.3 151.94 149.34 298.68 1350.0 1350.0 1325.3 157.03 154.51 309.02 1400.0 1399.9 1375.2 163.38 160.95 321.90 1450.0 1449.9 1425.2 169.24 166.90 333.81 1500.0 1499.9 1475.2 175.89 173.63 347.26 1550.0 1549.9 1525.2 181.69 179.51 359.01 1600.0 1599.9 1575.2 187.53 185.42 370.84 1650.0 1649.9 1625.2 193.27 191.24 382.47 1700.0 1699.9 1675.2 199.03 197.06 394.13 1750.0 1749.9 1725.2 204.77 202.87 405.74 1800.0 1799.9 1775.2 213.75 211.03 422.05 1850.0 1849.9 1825.2 219.66 217.01 434.03 1900.0 1899.9 1875.2 224.89 222.33 444.66 1950.0 1949.9 1925.2 230.52 228.04 456.07 2000.0 1999.9 1975.2 236.31 233.90 467.79 2050.0 2049.9 2025.2 243.29 240.93 481.87 .2100.0 2099.9 2075.2 247.02 244.75 489.50 2150.0 2149.9 2125.2 252.12 249.92 499.83 2200.0 2199.9 2175.2 257.52 255.37 510.75 2250.0 2249.9 2225.2 262.80 260.72 521.44 2300.0 2299.9 2275.2 268.24 266.21 532.41 2350.0 2349.9 2325.2 273.91 271.93 543.87 • 2400.0 2450.0 2399.9 2449.9 2375.2 2425.2 279.88 284.70 277.94 282.82 555.89 565.64 2500.0 2499.9 2475.2 289.19 287.36 574.72 2550.0 2549.9 2525.2 294.42 292.64 585.27 37 of 45 VSfL1SlOYl Union Oil Compan~of California Well: Mastodon 6-3-9 MEASURED VERTICAL DATUM RAW 1-WAY 2-WAY GEOPHONE GEOPHONE GEOPHONE PICK VERTICAL VERTICAL DEPTH DEPTH DEPTH TIME TIME TIME • (FT) (FT) (FT) (MS) (MS) (MS) 2600.0 2599.9 2575.2 299.58 297.83 595.67 2650.0 2649.9 2625.2 305.46 303.76 607.51 2700.0 2699.9 2675.2 310.03 308.38 616.75 2750.0 2749.8 2725.1 316.37 314.75 629.50 2800.0 2799.8 2775.1 320.52 318.94 637.88 2850.0 2849.8 2825.1 325.94 324.40 648.79 2900.0 2899.8 2875.1 330.68 329.17 658.34 2950.0 2949.8 2925.1 335.39 333.92 667.84 3000.0 2999.8 2975.1 341.80 340.36 680.71 3050.0 3049.8 3025.1 347.56 346.14. 692.28 3100.0 3099.8 3075.1 351.38 350.00 700.00 3150.0 3149.8 3125.1 356.89 355.54 711.07 3200.0 3199.8 3175.1 361.63 360.31 720.61 3250.0 3249.8 3225.1 367.38 366.08 732.16. 3300.0 3299.8 3275.1 372.45 371.18 742.36 3350.0 3349.8 3325.1 377.53 376.29 752.57 3400.0 3399.8 3375.1 383.26 382.03 764.06 3450.0 3449.8 3425.1 388.18 386.98 773.96 3500.0 3499.8 3475.1 392.93 391.76 783.51 3550.0 3549.8 3525.1 397.43 396.28 792.57 3600.0 3599.8 3575.1 402.42 401.29 802.58 3650.0 3649.8 3625.1 407.12 406.02 812.04 3700.0 3699.8 3675.1 413.03 411.94 823.88 3750.0 3749.8 3725.1 417.62 416.55 833.10 3800.0 3799.8 3775.1 421.44 420.39 840.78 3850.0 3900.0 3849.8 3899.7 3825.1 3875.0 426.29 430.41 425.27 429.41 850.54 858.81 * • 3950.0 3949.7 3925.0 435.03 434.05 868.10 4000.0 3999.7 3975.0 439.68 438.72 877.43 4050.0 4049.7 4025.0 444.37 443.42 886.84 4100.0 4099.7 4075.0 449.00 448.07 896.14 4150.0 4149.7 4125.0 453.46 452.55 905.10 4200.0 4199.7 4175.0 457.67 456.77 913.53 4250.0 4249.7 4225.0 462.14 461.26 922.53 4300.0 4299.7 4275.0 466.33 465.47 930.94 4350.0 4349.7 4325.0 470.60 469.75 939.51 4400.0 4399.7 4375.0 474.94 474.11 948.21 4450.0 4449.7 4425.0 480.71 479.88 959.77 4500.0 4499.7 4475.0 484.92 484.11 968.22 4550.0 4549.7 4525.0 487.64 486.85 973.69 4600.0 4599.7 4575.0 492.31 491.54 983.08 4650.0 4649.7 4625.0 496.73 495.97 991.94 4700.0 4699.7 4675.0 501.03 500.29 1000.59 4750.0 4749.6 4724.9 505.51 504.79 1009.57 4800.0 4799.6 4774.9 510.11 509.40 1018.79 38 of 45 VSfUSlOrl Union Oil Company of California Well: Mastodon 6-3-9 4. LIST OF FIGURES Figure 1 Acquisition Parameters Client: Union Oil Company of California Well: Mastodon 6-3-9 S-R Source 1 Location 300 ft ......... ..........................................................+........ Off t ... Receiver Reference (KB) se = Elev. = 380.5 ft Azimuth = 230°N ~ , Source Elevation = 355.8 ft ; Ground Elev. at ~ Wellhead = 355.8 ft Source 2 Location ' ~ ~ • ~ ~ ~ Offset = 250 ft ~ ;TCD ~~ ~ ~ Seismic Datum Elev. Azimuth = 232°N ~ ~ ~ ' ~ ~ ~ ~ = 355.8 above MSL Source Elevation = 35 ~ ~ ~ ` ~ ; ~ ~ ~ ~ ~ ~ ~ ~ ~ i i i i ~ ~ ~~ ~ Replacement ; ', i ~ ; , ; ~ Velocity (VDC) ' ~~ ~ ~ ~ ~ ~ MSL = 13,000 ft/sec ~ . ~ , ` '~ i i ~ Vibroseis Source i ' ~•~ DGM ~ . • Receiver 1 ~ ` ^ Receiver 2 T ; ' ~ i ' ~•` !TGD i ~ DGD •._._._.• Times ' '~ ~ ' ~ , ~ T Raw Pick Time '~ (I) ~ ~ ; (ie. Time from Source to Receiver) ~ ~ ~€ ' ~ TGD Vertical Time Corrected to Datum ` ; , ; = Tcos(I) +TCD ~ ' where (I) is Source-Receiver Offset Angle ~• ~ ; ~ ~ and TCD is Datum Correction Time (=[SDE-ES]/VDC) '~ ~ i DELDGT Difference in TGD between Receivers """'~~"'~*~~~"'~~"~'~~"'" '•"'~""~~~ ! DELDGT ~ DELDGD ~ f. _ _ _ _ _ _~ Distances Velocity S-R Source-Receiver Offset (SRC_REC) VDC Datum Correction Velocity ES Elevation of Source above MSL DGM Measured Depth of Receiver below Reference DGD True Vertical Depth of Receiver below Datum DELDGD Difference in DGD between Receivers SDE Seismic Datum Elevation above MSL • 39 of 45 vsfusion • Figure 2 o- u ~ -10Q- O O U r -20C- Source -Receiver Locations Plan View Source =Rectangle Receivers =Triangles X Coord. (ft) -200 -100 0 . i i ~ __1__ __J___l__L__1__ __J___l__1 __~ _ ^I • Survey Configuration Client: Union Oil Company of California Well: Mastodon 6-3-9 Area: North Slope, Alaska East -West Coordinates Side View (XZ -Plane) North -South Coordinates Side View (YZ -Plane) Source =Rectangle Receivers = Triongles X Coord. from Wellhead (ft) -200 -100 0 i i ~ o- .~+ v E i ooo- v 0 3 O a~ m r 2000- a O U N > 300o- w 400o- __r__ __1__ __~___r__r__r__ . __J___l__L__1__ ~. _ __J__ !___l __L_ _ ''r- „ ~ r'_r-- , --,---r'-r'-r' __r__ --f-- r__r__ -- ~° '-'-F--f-- __i__ ~___~__r _ --i-- .---'r--r - __T__ __ i__i___~.__}__ __ i__ i___i __f _ S.L. ------0- N ~ ~ ooo- v 0 3 0 a~ m r 2oao- d. N O v U a) > 3000- a~ f`- 4000- Source =Rectangle Receivers =Triangles Y Coord. from Wellhead (ft} -200 -160 0 i i ~ r___r__~___ ---;---, ___1___L___l__1___ ___i___r___r__~__ ___L___l___r___J__ _ _ ___t___r___r__~___ ___r___r___r__i _ _ ___~___r___r__~___ r---r--r-- ___r___r___r_ ___ -°~---'r' _ i i ~ ~ ''-t-'-r--r -'v" ~ i "'i"'r- --~°- o •,., ~~ 4~) V1 w 0 0 '~ VSFuaion A Figure 2A Source - Receiver Locations Plan View Source = Rectangle Receivers = Triangles X Coord. (ft) -200 -100 -5 . ~, v -- -- --- -- -- -- -- -- -- --- -- - o -1 0 -- -- --- -- -- ------ -- -- --- -- - U -- -- --- -- -- ----- - -- --- -- - . . -15 . ~ ~ ~ ~ ~ . _ _ _ Q i-- ~_-~--L--i---i -_ __i__~___.-__: _ VSFusion Survey Configuration Client: Union Oil Company of California Well: Mastodon 6-3-9 Area: North Slope Alaska (Rawl Data) East - West Coordinates Side View (XZ - Plane) Q- 1 ~ i o0o- a 0 3 o - m L ?~~Q- CL N Cf U a~ > 3000- L 4oao- Source = Rectangle Receivers = Triangles X Coord. from Wellhead (ft) -200 -100 0 i i i . . . ; ~ , K __{__ . . __ ~___L__J__ ~___ __}__J._ ~___~ __T__ ~ f__l__l___ __T __T___i __ _ . , S.L. ~ ~ o0o- 0 0 3 _o m L 2000- CL N U a`~ > 3000- a~ L 4oaa North - South Coordinates Side View (YZ - Plane) Source = Rectangle Receivers = Triangles Y Coord. from Wellhead (ft) -200 -150 -100 -50 ~ ~ ~ ~ . -~ ~ ~„ . . . . ~ . . ,~~~ ~ ~ ~ ~ _l_l_l_l_ ~~ ~ i ____ ~~ _______ _ ~~ _ _ A o •.~ (n ; 4--1 l w O • • • • Figure 2B w -50- `o ~ -i oo- -i5o- Source - Receiver Locations Plan View Source = Rectangle Receivers = Triangles X Coord. (ft) -200 -100 0 ___r ___r __i___r___ __~___r___r __~___ _ --F-- ~---i---f--- --i---f---L--~--- - • Survey Configuration Client: Union Oil Company of California Well: Mastodon 6-3-9 Area: North Slope, Alaska (Raw2 Data} East - West Coordinates Side View (XZ - Plane) Source = Rectangle Receivers = Triangles X Coord. from Wellhead (ft) -200 -100 0 i i i o- E i o0o- v 0 3 0 a~ m L 200o- a a~ v U > 3oao- a~ 4000- ,, ___r___r __i___r___ ___~___r__ ~___i_ _ ---~--;---;---F--- i i ,~ ---i---~--;---i--- - ___r___r __i___r___ _ r___r __~___ --;---~ , _ S.L. ~ ~ o0o- v 0 3 0 a~ m L 2000- a a~ 0 U N > 3000- a~ F`- 4000- North - South Coordinates Side View (YZ - Plane) Source = Rectangle Receivers = Triangles Y Coord. from Wellhead (ft) -150 -100 -50 0 ,i i i i ,,,, ,,,, r_ ~~ . ~ ~ -~-_r _r_~_ ~ ~ . ~ . __r_r__r _r_ , _i__~_ ~__ _ ~-- „ ~ , - ~-;--L-~-- ~ i , , , , --~ -;- ~--~- , r_ ,,,, _~__r _r_i__ ,,,, _r_r_ ~__r_ ,,,, _~__r_r_~__ _ • OF •... 4-~ w 0 N VSFusion A Figure 3 Plan Vew 1.!- ~~ ~ -20- 0 0 " -40- } VSFusion X Coord. (ft} -20 0 i i . T T " T " T " T r r r " T " f " f "f " "r "i ~ ~ ~ 1__1__1__ i i ~ __L__L__L__ ~ ~ __L_ ~_ „ T T T T r. T__r__r__ __r__r r__r__ __r__r Directional Survey Display Client: Union Oil Company of California Well: Mastodon 6-3-9 Area: North Slope, Alaska E/W Coordinates 5aa- 100o- ~ _ 15ao- v -_ 0 0 2aoa- m L - a 2500- m O ° 3000- N ~, 3500- ~ - 4aao-= 4500- X Coord. from Wellhead (ft) -20 0 „ T T"T"T" T r f r "f"f"f''r' r r "r"f 1__1__1__ __L__l__L __l. __t__l 1--T--T-- --T"f"f"fQ r"r l__1__1__ __1__L__i __ __l__l ,_ _~ 1__1__1__ __1__L__L_~__ _____l •--•--~-- --T--r--rfrr- --~--~ "T"~" T-, __ "'"f~'r"' -,-, __ __ i__t__a__ i i i __t__~__~_~__ ~ i i __~__~ i i i i i ~ i i i i T r T -.-r r r r i i i r-r--r-- i --r-- -- --r-- --~---~ -- -- - -- --r-a-- - - - --------- -----`-~--r-- ------ •--~--_-- --•--r[rr----- --~--~ T__T__T__ __r__re_r __r__ ~, __r__r T"T"T" "T"f~[ "f"r" "f''r l __1__1 __ __L__E?_L __L__ __l__l = T__T__T__ __i_ r__r__r__ __f__r •--~--'-- --~A~--~--~-- --~--'- t__T__T__ _ ~__r __f__f__ __ __ f f 1__1__1__ 1__L__l __l__ __~___l 500- 1 oao- 1500- v 0 2oao- m L n 2500- a~ 3000- N ~ 3500- 4000- 4500- N/S Coordinates Y Coord. from Wellhead (ft} -40 -20 0 0 ~'f i'l' 'l'1'T'1" 'f i'l'1 1'T l_L !_J_ _i_1_1_i_ __J_J_ i _~_1 f-i i-l- -l'1-T't' } ~ 'f i' '}~ 'l'T l_l!_J_ _i_i_1_i_ J _l!_J_ _~_i r i ~ ~ ~ ~ r r ~ ~ ~ ~ -r r~ ~ _ ~_ ~_ ~_ - 'i'T"i'T - -' 'T'7 _ __ _ _ _ _ _ _ __ _ _ _ _T f'r i"'~i' "1'7'T'f __ i'1'~' '7'~ ---- ---•-A -- - - --- -4-T-- ----- -- f'r ~ l' _ 177,~1'T'T' 'f i l'l' '1'T - - - - a, - - - - - - - - - - - f'f i'1' 't'1'T'T" 'f i';'l' 'l'T f'f l'~ 'l'i'T'T' 'f l'l'l' 'l'T L_l 1_ _J_l _1_L_ _l i_J_J_ _J_1 A o~ .... j 4-, w 0 M t7 • • • • Figure 4 1 ~-. N 2 r U Z W W L~ WAVENUMBER (CYCLES/KF} -- - rv - - - 2a-~ .u „' - I i -50 ~, .~ ,~ ~°* __ Y ~ ~ .. -w a~.~~ . r~mru i vvc wo1 • F-K Analysis for Raw Total Wavefield (Vertical Component) 1I0 rF-1 as 0 0 I D • ~~ 9 0~ .~~./y~ ', //~VJ } `1'~1 j V7 7 w 0 R VSFusion A Figure 4A F-K Analysis for Raw Total Wavefield (after removing noise traces and muting noise} WAVENUMBER (CYCLES/KF) w 0 i i _,_.._ -50 -40 -30 AMPLITUDE (DB) -20 VSf=union -10 A • • • Enclosure 1 ri.r BAI(ER NV61~S Baker Atlas BOREHOLE SEISMIC ANALYSIS PREPARED BY BAKER HUGHES BAKER ATLAS CLIENT :UNION OIL COMPANY OF CALIFORNIA WELL MASTODON 6-3-9 LOCATION: NORTH SLOPE ENGINEER: R. KLEB DATE MARCH 20 2008 FIELD ENGINEER'S LOG .~`~ ~~ NUG~S SURVEY i NFORIdAT I ON Baker Atlas CLIENT UNION OIL COMPANY OF CALIFORNIA CLIENT REP ERIC WALKER WELL NAME MASTODON 6-3-9 WELL LOCATION NORTH SLOPE FIELD NAME WHITE HILLS RIG NAME HARBORS 106 ENGINEER R. KLEB TYPE OF SERVICE ZVSP / GR WIRELIKE CO. AND DISTRICT BA ALASKA WIRELIKE OPERATOR RUN NUMBER 1 TOTAL TRIPS THIS RUN 1 WEATHER/SEAS COLD / CLEAR DATE MARCH 20 2008 JOB NAME CHEV20MAR08 SERVICE ORDER NO. 502615 WELL I NFORIrI~-T I ON WELLHEAD COORDINATES 155'__FSL do 2119' FWL OF SEC 6 RIG HEADING N/A ELEV K.B. 380.50 FT OPEN HOLE DIAMETER 8.5 IN ELEV D.F. 380.5 FT MAX. TEMPERATURE 88 DEGF GROUND ELEVATION 355.80 FT FLUID TYPE KCL / POLYMER WATER DEPTH N/A CASING: SIZE FROM TO WELL T.D. 4790 FT 1) 9.625 IN 0 FT 1872 FT REFERENCE DATUM 380.5 FT 2) DEVIATED WELL YES 3) MAXIMUM DEVIATION 2.0 DEG 4) DOWNHOLE RECEIVERS RECEIVER TYPE 6204 XA ARM LENGTH MEDIUM PREAMP GAIN 60 dB SENSOR TYPE LRS 1011 SENSOR FREQUENCY 10 HZ GIMBAL YES GIMBAL TYPE 1025 ZERO POINT KB DEPTH ERROR LOGGING TOOLS USED FIELD ENGINEER'S LOG RECORDING SYSTEM ri~r E~ICER NU6NES Baker Atlas RECORDING UNIT ASSET NUMBER 6698 SURFACE A/D TYPE DSS 16 Chs SA2D NUMBER DOWNHOLE A/D: TYPE ~/A ASSET NUMBER N_/A SURFACE A/D CHANNELS USED 8 DOWNHOLE A/D CHANNELS USED ~1/A FLASK TYPE ~/A SAMPLE RATE 1 MSEC RECORD LENGTH 4 SEC SWEEP LENGTH 6 SEC RECORDING DELAY 1135 MSEC TIME FROM START OF RECORD TO TIME BREAK 100 MSEC LOW CUT FILTER OUT HIGH CUT FILTER 150 HZ TAPE TYPE TAR TAPE FORMAT SEGY WIRELINE ~ WTS PANEL WIRELINE ASSET NO 2005-053-A WIRELINE LENGTH 14196 FT TRANSMIT GAIN ~1/A MODE 2 GAIN 1 MODE 2 EON. 1 ~{/A MODE 2 EQN. 2 MODE 5 GAIN ~/A MODE 5 EON. 1 MODE 7 GAIN _N/A MODE 7 EON. 1 WIRELINE TYPE 7H484K WTS TYPE/ASSET NO ~/A MODE 2 GA I N 2 -LI/A ~/A MODE 2 EQN, 3 ~/A ~/A MODE 5 EQN. 2 ~/A .~/A MODE 7 EON. 2 _11/A SPECIAL FEATURES ~i.r CHANNEL ASSIGNMENT & GAIN ~E Baker Atlas RECEIVERS AND INTERCONNECTS RECEIVERS: ri~~ BAKER NUGNES Baker Atlas INTERCONNECTS: I/.~~ BAKER Nut~NES PROCESSING INSTRUCTIONS Baker Atlas SEISMIC DATUM: 380.50 FT CORRECTION VELOCITY 13000.00 FT/SEC LOGS AVAILABLE ON SITE XMAC MREX \ RCI PROCESSING INSTRUCTIONS RECEIVED YES] PRIORITY YES] CALIBRATION YES] SYNTHETIC YES] VSP YES] VELOCITY NO ] INVERSION NO ] OFFSET VSP NO ] WALKAWAY NO ] PROXIMITY NO ] NORMAL INCIDENCE NO ] 3 COMPONENTS NO ] 3D NO ] NAVIGATION NO 1 GYRO CHANNEL 4 PILOT\ C HANNEL 5 VI B PILOT\ CHANNEL 6 S PARE\ CHA NNEL 7 TB CASING SHO E AT 187 2 GAMMA TIE IN AT 13 50' WI TH +2 4' CORRECTION AND AT 1460' WI TH + 5' CORR ECTION 1800' MOVE D VIBS 2 50' FR OM WE LL TO FINISH VSP ON SOURCWE T WO FROM TD TO 1800' V IBS AT 300' FROM RIG. SHOT FOUR OVERLAP LEVELS FROM 1950' TO 1800' REPEAT SHO T AT 131 0' WIT HIN 1M 5 OF PREVIOUS. 1872' IS T HE CASIN G SHOE . SOURCE 1 T D 4800'. 3150 ' NOIS Y LEVEL. 3050' NOIS Y LEVEL PGS VIBRAT ORS WITH SERCE L ELEC TRONICS 0 PHASE ENC ODER AND DECODER. VIBROSEIS SURVEY VIBRATORS OFFSET NO. 1 DISTANCE FROM WELL 300.00 AZIMUTH FROM WELL 230.00 ELEVATION FROM MSL 355.80 N0. OF VIBRATORS 2 ELECTRONICS SERCEL SWEEP LENGTH 6 SEC FREQUENCY RANGE 6 TO 100 HZ UP/DOWN SWEEP UP TAPER 200MS DRIVE 80% VIBRATOR TYPE AHV4 VIBRATOR UNIT N0. 1 AND 3 PHASE LOCKING GROUND FORCE ENCODER PHASE 0 DEG VIBRATOR PHASE 0 DEG DOWNHOLE WAVELET PHASE 0 DEG TIME PICK PEAK Baker Atlas OFFSET NO. 2 DISTANCE FROM WELL 250 AZIMUTH FROM WELL 232 ELEVATION FROM MSL 355.8 N0. OF VIBRATORS 2 ELECTRONICS SERCEL SWEEP LENGTH 6 SEC FREQUENCY RANGE 65 TO 100 HZ UP/DOWN SWEEP UP TAPER 200MS DRIVE 80% VIBRATOR TYPE AHV4 VIBRATOR UNIT N0. 1 AND 3 PHASE LOCKING GROUND FORCE ENCODER PHASE 0 DEG VIBRATOR PHASE 0 DEG DOWNHOLE WAVELET PHASE 0 DEG TIME PICK PEAK REFERENCE PHONE TYPE N/A DISTANCE FROM SOURCE AZIMUTH FROM SOURCE DEPTH FREQ TYPE DISTANCE FROM SOURCE AZIMUTH FROM SOURCE. DEPTH FREQ SURVEY CONFIGURATION LABEL DISTANCE AZIMUTH ELEVATION OFFSETI 300.00 230.00 355.80 OFFSET2 250.00 232.00 355.80 ri~r BAKER NU6NES TOOL STATIONS SUMMARY OFFSET 1 CLIENT UNION OIL COMPANY OF CALIFORNIA WELL NAME MASTODON 6-3-9 SOURCE TYPE VIBROSEIS SERVICE Offset VSP elocity PAGE 1 OF 2 III IIIII~!~il!!!11~111iiiiiiii~9i~ ~~111 I,~~Q~~ ~~~liN~~ ~1iJ~~;~W"t" ~'~~M~il, NO. TOOL STATION FILE NUI6ER STATI N0. RECV NO. VER TIME PI TIIE AT OOIPLETION REW RKS 1 4800. 1-10 1 1 526.8 Mar 21 2008 01:28:2 Kill 1 2 4 5 2 4750. 11-40 2 1 513.0 Mar 21 2008 01:49:5 Kill 11-26 28-32 34 35 3 4700. 41-52 3 1 515.7 Mar 21 2008 01:57:5 Kill 41-43 47 49 50 4 4650. 53-66 4 1 510.5 Mor 21 2008 02:06:4 Kill 53-56 59-61 64 65 5 4600. 67-81 5 1 506.0 Mor 21 2008 02:12:3 Kill 67-69 72 74 76 79 6 4550. 82-93 6 1 501.0 Mar 21 2008 02:17:11 Kill 82-84 87 90 7 4500. 94-113 7 1 494.0 Mar 21 2008 02:25:1 Kill 94 96 97 99 101 104-107 109 1 8 4450. 114-128 8 1 490.0 Mar 21 2008 02:30:31 Kill 115 117 119 121 123 125 126 9 4400. 129-138 9 1 486.0 Mar 21 2008 02:34:3 Kill 132 134 136 137 10 4350. 139-146 10 1 482.7 Mar 21 2008 02:38:3 Kill 141 143 146 11 4300. 147-158 11 1 478.8 Mar 21 2008 02:42:4 Kill 147 149 150 152 155 157 12 4250. 159-165 12 1 474.9 Mar 21 2008 02:45:4 Kill 163 13 4200. 166-175 13 1 469.9 Mar 21 2008 02:49:31 Kill 167 170 172 14 4150. 176-185 14 1 465.2 Mar 21 2008 02:53:3 Kill 177 179 182 184 15 4100. 186-192 15 1 461.8 Mar 21 2008 02:56:3 Kill t88 190 16 4050. 193-203 16 1 455.8 Mar 21 2008 03:00:3 Kill 193 194 196 197 199 17 4000. 204-212 17 1 451.3 Mar 21 2008 03:04:1 Kill 206 209 211 18 3950. 213-219 18 1 447.0 Mar 21 2008 03:07:01 Kill 217 219 19 3900. 220-229 19 1 442.8 Mar 21 2008 03:10:4 Kill 220 223 226 20 3850. 230-239 20 1 437.3 Mar 21 2008 03:14:51 Kill 231 233 234 239 21 3800. 240-249 21 1 433.7 Mar 21 2008 03:19:0 Kill 241 245 246 249 22 3750. 250-257 22 1 430.0 Mar 21 2008 03:22:3 Kill 255 256 23 3700. 258-266 23 1 423.6 Mar 21 2008 03:26:21 Kill 261 262 264 265 24 3650. 267-276 24 1 420.0 Mar 2 1 2008 03:30:11 Kill 267 269 272 275 25 3600. 277-283 25 1 415.5 Mar 21 2008 03:32:5 Kill 279 282 26 3550. 284-299 26 1 410.0 Mar 21 2008 03:38:2 Kill 285 287 288 290-293 295 296 27 3500. 300-307 27 1 405.1 Mar 21 2008 03:41:5 Kill 301 304 306 28 3450. 308-316 28 1 399.3 Mar 21 2008 03:45:1 Kill 309 312 314 29 3400. 317-323 29 1 394.9 Mar 21 2008 03:47:5 Kill 319 322 30 3350. 324-332 30 1 389.0 Mar 21 2008 03:51:3 Kill 325 328 330 332 31 3300. 3-342 31 1 385.0 Mar 21 :55:11 Kill 334 335 340 TOOL STATIONS SUMMARY OFFSET 1 CLIENT UNION OIL COMPANY OF CALIFORNIA WELL NAME MASTODON 6-3-9 SOURCE TYPE VIBROSEIS SERVICE OffSst VSP elocity PAGE 2 OF 2 ~IIII~~~~!!I~I~` iilllb~ ~IIII ~IGL~l~~' .~~1:iiN:~H~"1r"' .~~'~1~~~q~51 IIO. TOOL STATION FILE NIA6ER STATI NO. RECV NO. VER TIME PI TIME AT OOIpLETION REW RIfS 32 3250. 343-356 32 1 379.0 Mar 21 2008 03:59:5 Kill 344-347 350 352 355 33 3200. 357-364 33 1 373.9 Mar 21 2008 04:03:0 Kill 358 361 363 34 3150. 365-383 34 1 366.7 Mar 21 2008 04:11:5 Kill 365-370 372 373 377 378 381 35 3100. 384-392 35 1 363.3 Mar 21 2008 04:15:0 Kill 385 390 36 3050. 393-404 36 1 358.0 Mar 21 2008 04:21:5 Kill 393 395 396 401 37 3000. 405-410 37 1 353.0 Mar 21 2008 04:24:3 Kill 410 38 2950. 411-417 38 1 347.5 Mar 21 2008 04:27:29 Kill 413 415 39 2900. 418-428 39 1 342.5 Mar 21 2008 04:31:4 Kill 419 422 424 426 427 40 2850. 429-436 40 1 336.8 Mar 21 2008 04:35:5 Kill 429 434 436 41 2800. 437-448 41 1 332.0 Mar 21 2008 04:39:4 Kill 437-439 441 446 42 2750. 449-460 42 1 325.8 Mar 21 2008 04:43:5 Kill 449- 451 454 455 458 43 2700. 461-470 43 1 320.7 Mar 21 2008 04:47:4 Kill 462 463 465 466 470 44 2650. 471-485 44 1 317.0 Mar 21 2008 04:53:0 Kill 471-474 478- 480 482 45 2600. 486-502 45 1 311.5 Mar 21 2008 04:59:3 Kill 487 488 490 493 494 498-500 46 2550. 503-514 46 1 305.0 Mar 21 2008 05:04:0 Kill 504 506 507 509 512 47 2500. 515-525 47 1 300.3 Mar 21 2008 05:08:01 Kill 516 518 519 521 522 524 48 2450. 526-538 48 1 295.0 Mar 21 2008 05:15:1 Kill 527-530 532 537 49 2400. 539-552 49 1 287.6 Mar 21 2008 05:22:1 Kill 539 540 542 545 547 548 550 50 2350. 553-564 50 1 283.3 Mar 21 2008 05:26:2 Kill 555 557 560-562 51 2300. 565-573 51 1 278.7 Mar 21 2008 05:30:2 Kill 566 569-571 52 2250. 574-580 52 1 274.7 Mar 21 2008 05:33:31 Kill 575 579 53 2200. 581-592 53 1 268.8 Mar 21 20 8 05:38:2 Kill 582 584 585 587-589 54 2150. 593-601 54 1 262.5 Mar 21 2008 05:42:0 Kill 595 597 600 55 2100. 602-610 55 1 257.7 Mar 21 2008 05:46:09 Kill 606 56 2050. 611-620 56 1 252.3 Mar 21 2008 05:50:0 Kill 611 613 618 619 57 2000. 621-632 57 1 245.5 Mar 21 2008 05:54:2 Kill 622 623 627 630 58 1950. 633-644 58 1 242.5 Mar 21 2008 05:59:1 Kill 633-635 638 643 59 1900. 645-655 59 1 234.6 Mar 21 2008 06:03:3 Kill 645 648 650 653 654 60 1850. 656-665 60 1 230.8 Mar 21 2008 06:11:41 Kill 656 657 661 Inside casin 61 1800. 666-675 61 1 224.5 Mar 21 2008 06:15:4 Kill 666 670 672 675 Movin Vibes TOOL STATIONS SUMMARY OFFSET 2 CLIENT UNION OIL COMPANY OF CALIFORNIA WELL NAME MASTODON 6-3-9 SOURCE TYPE VIBROSEIS SERVICE Offset VSP ~ GR PAGE 1 OF 2 a!IIIIN'NN!1Q~~ ~iiii~~i~~Nlill ~@C~M.~. N~~~ N~~~~lc;~:~i~° ,~~.~~;~~ NO. TOOL STATION FILE NUI6ER STATI NO. RECV NO. VER TIME PI TIME AT OOIPLETION REW RKS 1 1000. 1-25 1 1 102.4 Mar 20 2008 23:41:1 Kill 1-23Testin tool and Vibs 3 4800. 31-42 3 1 521.0 Mar 21 2008 01:15:1 Kill 31- 36 41 TD Nois Void files 4 4750. 43-43 4 1 512.0 Mar 21 2008 01:18:2 Files 31 to 43 void. 6 1900. 56-67 6 1 231.5 Mar 21 2008 06:34:4 Kill 57 59 62 64 65 7 1850. 68-77 7 1 226.5 Mar 21 2008 06:38:3 Kill 68 71 73 74 76 Inside Casin 8 1800. 78-93 8 1 220.2 Mar 21 2008 06:44:5 Kill 79 80 82-85 87 88 91 9 1750. 94-103 9 1 214.5 Mar 21 2008 06:49:0 Kill 95 96 98 100 103 10 1700. 104-113 10 1 208.9 Mar 21 2008 06:52:2 Kill 104 106 108 109 11 1650. 114-122 11 1 204.0 Mar 21 2008 06:55:4 Kill 114 116 119 121 12 1600. 123-131 12 1 196.5 Mar 21 2008 06:59:3 Kill 123 124 127 129 13 1550. 132-141 13 1 192.0 Mar 21 2008 07:03:1 Kill 133 136 138 14 1500. 142-152 14 1 185.5 Mar 21 2008 07:07:21 Kill 143 146 148 150-152 15 1450. 153-161 15 1 178.2 Mar 21 2008 07:10:3 Kill 154 157 159 16 1400. 162-171 16 1 173.9 Mar 21 2008 07:14:5 Kill 162 164 165 169 170 17 1350. 172-178 17 1 166.5 Mar 21 2008 07:18:3 Kill 173 178 18 1310. 179-188 18 1 161.0 Mar 21 2008 07:23:3 Kill 180 182 185 187 19 1250. 189-198 19 1 154.0 Mar 21 2008 07:28:2 Kill 189 190 192 195 20 1200. 199-211 20 1 146.0 Mar 21 2008 07:33:1 Kill 199 202 204 207-211 21 1150. 212-220 21 1 141.0 Mar 21 2008 07:37:0 Kill 214 217 219 22 1100. 221-233 22 1 134.8 Mar 21 2008 07:41:5 Kill 222-224 227 229 231 232 23 1050. 234-243 23 1 128.4 Mar 21 2008 07:45:4 Kill 234 235 237 241 242 24 1000. 244-252 24 1 120.8 Mar 21 2008 07:49:4 Kill 244 246 249 60hz noise to 25 25 950. 253-264 25 1 116.0 Mar 21 2008 07:53:5 Kill 254 256 259 261 263 26 900. 265-274 26 1 109.5 Mar 21 2008 07:57:41 Kill 267 269 270 27 850. 275-284 27 1 103.0 Mar 21 2008 08:01:4 Kill 275 278 283 28 800. 285-294 28 1 97.2 Mar 21 2008 08:05:21 Kill 285 287 288 290 291.293 29 750. 295-304 29 t 92.0 Mar 21 2008 08:08:39 Kill 295 298 301 303 30 700. 305-316 30 1 86.4 Mar 21 2008 08:13:1 Kill 305 306 308-310 313 315 31 650. 317-326 31 1 80.0 Mar 21 2008 08:16:5 Kill 317 319 320 322 325 32 600. 327-338 32 1 74.8 Mar 21 2008 08:22:0 Kill 328 330 331 333 335-337 550. 39-347 1 9.5 Mar 2008 08: 9 Kill 340 34 34 6 TOOL STATIONS SUMMARY OFFSET 2 CLIENT UNION OIL COMPANY OF CALIFORNIA WELL NAME MASTODON 6-3-9 SOURCE TYPE VIBROSEIS SERVICE OffSat VSP / GR PAGE 2 OF 2 ~IIIIN"i~~~'J'~ lilll~%~III ~,141~1.lI~ I'AI~I~ ~:~I~~~~ l;~a~".~ ~" a"~.1 ~1~~1 NO. TOOL STATION FILE NUI~ER STATI N0. RELY NO. VER TIIE PI TIYE AT OOIPLETION REWRKS 34 500. 348-356 34 1 64.0 Mar 21 2008 08:29:3 Kill 349 352 354 35 450. 357-364 35 1 57.5 Mar 21 2008 08:32:59 Kill 359 362 36 400. 365-373 36 1 51.5 Mar 21 2008 08:36:4 Kill 367 369 371 372 37 380. 374-391 37 1 48.0 Mar 21 2008 08:43:4 Kill 374 375 377 378 380 382 383 38 350. 392-402 38 1 47.1 Mar 21 2008 08:48:0 Kill 393 395 396 398 399 401 39 .300. 403-410 39 1 40.3 Mar 21 2008 08:51:2 Kill 404 407 410 40 250. 411-419 40 1 36.0 Mar 21 2008 08:55:3 Kill 412 415-417 Enclosure 2 Chevron ~VI astod o n_6-3-9 S u rve Re o rt Y p CURRENT MD -NOT TO TD Report Date: March 12, 2008 Survey / DLS Computation Method: Minimum Curvature / Lubinski Client: Chevron Vertical Section Azimuth: 90.000° Field: White Hills Vertical Section Origin: N 0.000 ft, E 0.000 ft Structure /Slot: Mastodon /Mastodon Slot 1 TVD Reference Datum: Rotary Table mSl= 380.5 Well: Mastodon TVD Reference Elevation: 380.5 ft relative to MSL Borehole: Mastodon 6-3-9 Sea Bed /Ground Level Elevation: 360.000 ft relative to MSL UWI/API#: 50029 Magnetic Declination: 22.924° Survey Name /Date: Mastodon_6-3-9 /March 8, 2008 Total Field Strength: 57493.741 nT ort /AHD / DDI / ERD ratio: 4.852° / 41.88 ft / 2.308 / 0.011 Magnetic Dip: 80.313° Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Feet Declination Date: March 08, 2008 Location Lat/Long: N 69 3814.050, W 1501 8.355 Magnetic Declination Model: BGGM 2005 Location Grid WE Y/X: N 5716722.000 ftUS, E 497580.000 ftUS North Reference: True North Grid Convergence Angle: -0.01780104° Total Corr Mag North -> True North: +22.924° Grid Scale Factor: 0.99990001 Local Coordinates Referenced To: Well Head Measured Incl depth angle (ft) (deg) 0 0 177.49 0.19 295.76 0.42 415.06 0.15 479.76 0.52 600.66 0.56 722.86 0.59 844.76 0.51 969.76 0.61 ------- ------- Azimuth ------ ------ Course -------- -------- TVD -------- -------- Vertical --------- --------- Displ --------- --------- Displ ---- ---- Total - - ----- ----- At ---- ---- DLS -- -- Srvy angle length depth section +N/S- +E/W- displ Azim (deg/ tool (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type ------- 0 ------ 0 -------- 0 -------- 0 --------- 0 --------- 0 ---- - 0 ----- 0 ---- -- 0 TIP 209.08 177.49 177.49 -0.14 -0.26 -0.14 0.29 209.08 0.11 MWD 200.7 118.27 295.76 -0.39 -0.83 -0.39 0.92 205.15 0.2 MWD 234.88 119.3 415.06 -0.67 -1.33 -0.67 1.49 206.82 0.26 MWD 217.32 64.7 479.75 -0.92 -1.62 -0.92 1.86 209.7 0.59 MW D 213.93 120.9 600.65 -1.58 -2.54 -1.58 2.99 211.92 0.04 MWD 216.58 122.2 722.84 -2.29 -3.54 -2.29 4.22 212.9 0.03 MW D 213.69 121.9 844.74 -2.97 -4.5 -2.97 5.39 213.41 0.07 MW D 216.98 125 969.73 -3.68 -5.49 -3.68 6.61 213.79 0.08 MWD 1099.26 0.63 203.69 129.5 1099.22 -4.38 -6.69 -4.38 8 213.17 0.11 MWD 1228.86 0.67 184.32 129.6 1228.82 -4.72 -8.1 -4.72 9.38 210.22 0.17 MWD 1357.46 0.63 188.33 128.6 1357.41 -4.88 -9.55 -4.88 10.73 207.06 0.05 MWD 1484.56 0.67 198.55 127.1 1484.5 -5.22 -10.95 -5.22 12.13 205.48 0.1 MW D 1614.36 0.61 197.99 129.8 1614.29 -5.67 -12.32 -5.67 13.57 204.71 0.05 MWD 1744.16 0.61 191.81 129.8 1744.08 -6:03 -13.66 -6.03 14.93 203.81 0.05 MW D 1818.09 0.71 194.41 73.93 1818.01 -6.22 -14.49 -6.22 15.77 203.24 0.14 MW D 1937.19 0.74 192.55 119.1 1937.1 -6.57 -15.95 -6.57 17.25 202.39 0.03 MW D 2066.29 0.78 184.55 129.1 2066.19 -6.82 -17.64 -6.82 18.92 201.14 0.09 MWD 2195.5 0.59 203.82 129.21 2195.39 -7.16 -19.13 -7.16 20.42 200.52 0.23 MWD 2324.32 0.63 187.6 128.82 2324.2 -7.52 -20.44 -7.52 21.78 200.21 0.14 MWD 2452.62 0.52 196.74 128.3 2452.5 -7.78 -21.69 -7.78 23.05 199.74 0.11 MWD 2580.84 0.8 194.28 128.22 2580.71. -8.17 -23.12 -8.17 24.52 199.47 0.22 MWD 2711.15 0.78 197.11 130.31 2711 -8.66 -24.85 -8.66 26.31 199.21 0.03 MWD 2838.98 0.82 185.24 127.83 2838.82 -9 -26.59 -9 28.07 198.69 0.13 MWD 2967.68 1 194.77 128.7 2967.51 -9.37 -28.59 -9.37 30.09 198.14 0.18 MWD 3094.98 0.75 189.53 127.3 3094.79 -9.79 -30.49 -9.79 32.02 197.8 0.21 MWD 3223.68 0.67 193.14 128.7 3223.48 -10.1 -32.05 -10.1 33.6 197.49 0.07 MWD 3352.48 0.66 216.02 128.8 3352.27 -10.71 -33.38 -10.71 35.06 197.78 0.2 MWD 3482.18 0.73 200.95 129.7 3481.96 -11.44 -34.76 -11.44 36.59 198.22 0.15 MWD 3610.48 0.66 200.35 128.3 3610.25 -11.99 -36.22 -11.99 38.15 198.32 0.05 MWD 3738.58 0.73 211.97 128.1 3738.34 -12.68 -37.6 -12.68 39.68 198.63 0.12 MW D 3867.67 0.74 200.86 129.09 3867.42 -13.41 -39.08 -13.41 41.31 198.94 0.11 MWD 3996.67 0.55 214.27 129 3996.41 -14.06 -40.37 -14.06 42.74 199.2 0.19 MWD 4124.77 0.79 216.34 128.1 4124.5 -14.93 -41.59 -14.93 44.18 199.74 0.19 MWD 4253.37 0.61 220.48 128.6 4253.1 -15.9 -42.82 -15.9 45.68 200.36 0.15 MWD 4382.77 0.66 230.15 129.4 4382.49 -16.91 -43.82 -16.91 46.97 201.11 0.09 MWD 4446.37 0.63 229.24 63.6 4446.08 -17.46 -44.29 -17.46 47.6 201.52 0.05 MWD 4512.29 0.77 235.74 65.92 4512 -18.1 -44.77 -18.1 48.29 202.01 .0.24 MWD 4640.99 1.36 245.68 128.7 4640.68 -20.21 -45.89 -20.21 50.14 203.77 0.48 MW D 4770.19 2.25 237.06 129.2 4769.81 -23.73 -47.9 -23.73 53.46 206.36 0.72 MWD • FINAL WELL REPORT MUDLOGGING DATA MASTODON 6-3-9 Provided by: ~~ EPOCH • Approved by: Compiled by: Distribution: ~'- ~ ~o 0 ~= ~~~ Larry Resch Harry E Bleys Date: March 23, 2008 • • C, Chevron Mastodon 6-3-9 TABLE OF CONTENTS 1 MUDLOGGING EQUIPMENT & CREW .... 1.1 Equipment Summary ........................... 1.2 Crew .................................................... 2 WELL DETAILS ......................................... 2.1 Well Summary ..................................... 2.2 Hole Data ............................................ 3 GEOLOGICAL DATA ................................. 2.1 Mudlog Summary ................................ 2.2 Connection Gas Summary .................. 2.3 Trip/Wiper Gas Summary ................... 2.4 Sampling Program /Sample Dispatch 4 DRILLING DATA ........................................ 4.1 Daily Activity Summary :....................... 4.2 Survey Data ......................................... 4.3 Bit Record ........................................... 4.4 Mud Record ......................................... 5 MORNING REPORTS ................................ Enclosures 2"/100' Formation Log (MD) 2"/100' LWD / Lithology Log (MD) 2"/100' Drilling Dynamics Log 2"/100' Gas Ratio Log (MD) [~1 EPOCH ..3 ..3 ..3 ..4 ..4 ..4 ..5 ..5 14 14 14 15 15 19 20 21 22 2 {hevron Mastodon 6-3-9 • 1 MUDLOGGING EQUIPMENT & CREW 1.1 Equipment Summary • • Parameter Equipment Type /Position Total Downtime Comments Cable to 1502 transducer for BOP 0 Casing Pressure tests onl . Com uter-Drill Floor Monitor Azonics 0 Computer -Pit Monitor Azonics Intermittent Computer overheatin . Com uter for Com an Man Ri watch Remote HP Coma 0 Com uter for Mud En ineer Ri watch Remote HP Coma 0 Com uter for Tool usher Ri watch Remote HP Coma 0 Computers for Mudloggers (3) Data editing, Rigwatch Master, and 0 Ri watch Remote all HP Com a Replaced trap assembly in QGM Agitator (Mounted in possum surface hole. Trap Ditch gas belly) Flame ionization total gas & 5.5 hrs briefly plugged with cuttings. Clear chromatography. frozen sample lines Hook Load / Wei ht on bit Drillin Line Sensor on Ri Floor 0 Derived from Strokes/Minute and 0 Mud Flow In Pum Out ut Mud Flow Out Flow line Sensor 0 Pit Volumes, Pit Gain/Loss 10 radar it sensors 0 Pum Pressure Stand i e Transducer 5 hrs Academ Pum stroke counters 2 2 roximi sensors 0 Crown Fast Sheave proximity 0 Rate of penetration sensors RPM PLC feed 0 Tor ue PLC feed 0 Wits In (LWD Data) Schlumberger LWD Computer to 0 Ri watch Master Com uter 1.2 Crew Unit Type Arctic Unit Number ~ ML014 Mudloggers Years Days Sample Catchers Years Days Technician Days Har Ble s. 7 19/22 Jim Foradas .5 11/22 Steve Forrest 5 Lar Resch 5 22/22 Dean Kekaulua .25 11/22 'Years experience as Mudlogger .Z Days at wellsite between rig up and rig down of logging unit. EPOCH cne+no~, Mastodon 6-3-9 2 WELL DETAILS 2.1 Well Summary Well: Mastodon 6-3-9 API Index #: 50-287-20023-00 Field: White Hills Project Surface Co-Ordinates: 155 FSL, 2119 FWL Sec. 6, T3N, R9E UM Borough: North Slope Primary Targets: State: Alaska Primary Target Depth: Multiple Rig Name /Type: Nabors 106E/Antic Double TD Depth: 4845'MD, Spud Date: March 3, 2008 Ground Elevation: 360.0 ft MSL TD Date: March 12, 2007 KB Elevation: 380.5 ft MSL Days Drilling: 10 TD Formation: Completion Status: Plug and Abandon Days Evaluating: 8 (3/13-21/08) Classification: Exploration 2.2 Hole Data • Maximum De th Mud Shoe De th FIT Hole Section MD ft TVD ft) TD Formation Weight (ppg) Dev. o. (inc) Casing/ Liner MD ft ~/p ft (ppg) Conductor 85 85 Permafrost - - 16" 85 85 N/A 12 %4' 1890 1889.91 9.4 0.73 9 5/8" 1847 1847.08 15.6+ 8 '/" 4845 4845.39 9.1 2.25 3 %2" 4828 4845.39 EPOCH Ct~ewron Mastodon 6-3-9 3 GEOLOGICAL DATA 3.1 Mud Log Summary 85' to 1890' MD (85.01' to 1889.915 TVD) Drill Rate ftlhr Total Gas units Maximum Minimum Avera a Maximum Minimum Avera e 197.1 1.0 83.8 103 0 0.7 (85-180') CLAYSTONE =Very pale yellow to yellowish gray to very light gray; very soft; mushy to pasty in part with poor to occasionally fair cohesion and adhesion; often slimy to gummy; samples balling on shaker; generally smooth but often silty to sandy in part with interbedded very fine to fine grain sand; carbonaceous material common; with occasional thinly interbedded immature scaley coal. No sample fluorescence, hydrocarbon indicators. (180-210') SAND AND CONGLOMERATIC SAND =Unconsolidated milky white to opaque, translucent to occasionally glass-like transparent, various shades medium to dark grayish black; predominantly coarse to very coarse, often fine to medium angular to rarely sub rounded grains; poorly sorted with poor to rarely fair sphericity in part; no visible stain; 5% bright gold florescence; extremely slow bluish white cut/residue. (210-306') CLAYSTONE =Light tannish brown color; malleable to crumbly tenacity; irregular fracture with good adhesive and poor to fair cohesive properties; dominantly roughly rounded cuttings habit; dull earthy luster; smooth clayey to slight rough with some volcanic ash and glass and abundant loose unconsolidated sands in sample. (210-306) SAND/CONGLOMERATE SAND =Loose unconsolidated clear to dirty white opaque grains; angular to sub angular to sub rounded unsorted grains; fair to poor sphericity; conglomerate sands dominantly quartz with clays and claystones, and some coal throughout; claystones increasing in thickness and amount; behaves almost like gumbo; claystone in sand and conglomerates is light gray to medium gray color; very tacky and goes from mushy to crumbly; conglomerates are very angular and show a great deal of weathering through sharp shearing actions and some smooth surfaces. (306-380) CLAY / CLAYSTONE =Light to medium to slightly dark bluish gray with green and black hues; sticky mushy to crumbly with coals and loose unconsolidated sands entrained; very adhesive and moderately cohesive; hydrates slowly; loose cuttings of calcites and some green stone; irregular fracture and rounded lumpy to rounded blocky cuttings habit; smooth clayey to slightly coarse with some increase of unconsolidated sands and a few small sandstone cuttings; thick to thin structure. (380-470) CLAYSTONE =Light medium to medium to dark gray; very cohesive with good adhesion; pasty to mushy; soft with no definable cuttings habit; cuttings balling on shaker; samples very difficult to wash; generally smooth sticky texture, occasionally slightly silty in part; occasionally interbedded with thin fine grain sand stringers and occasional immature coal. No sample fluorescence; no evidence of hydrocarbons. (470-510) SILTSTONE = Light to medium gray with slight light brownish hues; extremely fine grain quartz w/ dominant argillaceous texture; very soft with no definable cuttings habit; often with traces of very fine carbonaceous fragments; gritty, grading to a silty claystone; no sample fluorescence. (510-570') SAND =Unconsolidated; salt and pepperwith dominant frosted, translucenttotransparent quartz, medium dark gray to occasionally medium bluish gray, amber lithic fragments and occasional carbonaceous • fragments; very well sorted; upper fine angular grains with poor sphericity no visible oil stain or fluorescence. ~1 EPOCH Chevron Mastodon 6-3-9 (570-600') SILT AND SILTY CLAYSTONE =Light to medium gray with very light brownish hues; interval generally gritty to very gritty grading from silty to slightly sandy claystone to argillaceous siltstone; with occasional lower medium grain quartz; no sample fluorescence. (600-690') SILTY CLAYS WITH INTERBEDDED SAND =Unconsolidated; salt and pepper with dominate milky white frosted quartz, light brown, greenish black to dark dusky blue green; fine to lower medium grain; angular with poor sphericity; moderate sorting; thinly interbedded with claystone and argillaceous siltstone; interval becoming finer grained and progressively more clay-like with depth; no sample fluorescence. (690-780') CLAY/TUFFACEOUS CLAYSTONE =Light gray to light olive gray, light pale yellowish brown; earthy; argillaceous to very slightly silty in part; very fine angular glass shards common along with extremely fine angular transparent glass-like grains; immature coal and very fine carbonaceous fragments common; occasional amber honey colored; no sample fluorescence or cut. (780-840) SAND = Clear to dominantly dirty grayish white opaque quartz grains; poorly sorted; upper coarse to upper fine grains; angular to sub angular to some sub rounded cuttings; low to fair sphericity; surface abrasions of frosting and etching; accessories of green stone possibly chlorite, rare calcites, and small claystone cuttings; gas background very low with no gas or oil indicators; no fluorescence or cut; some siltstone and increase of claystone entrained in sands. (840-930) CLAYSTONE/TUFFACEOUS CLAYSTONE SILTSTONE AND VOLCANIC ASH =Light gray to medium gray with tannish and green hues; sticky to lumpy malleable to crumbly consistency; elastic sectile to malleable to crumbly tenacity; irregular fracture; lumpy rounded cuttings habit; smooth to rough texture with large amounts of ash and volcanic glass; unconsolidated sands entrained in claystone and tuffaceous claystones; dull to waxy to shiny with volcanic glass shard and sands; slight calcareousness from some calcite entrained; thin to thick slumping structure; hydrates slowly and washes away suddenly; very adhesive moderate cohesiveness. i (930-990) SAND =Translucent to cloudy grayish white opaque dominantly quartz sands; upper very fine to lower medium grain size; poorly sorted sub angularto sub rounded grains; evidence of weathering as surface abrasions etching and conchodial burst for pitting; low to moderate sphericity; unconsolidated with accessories of green stone, calcite claystone, black carbonaceous materials; some rare loose lithic fragments; gas background very low to nonexistent; no fluorescence, no cut; no oil or gas indicators. (990-1020) CLAYSTONE, TUFFACEOUS CLAYSTONE, VOLCANIC ASH AND GLASS =Light gray to medium gray with black and olive green hues; rough to smooth texture with visible amounts of ash and shiny volcanic glass entrained in claystone; moderate to high adhesive to moderate to low cohesive properties; black carbonaceous material, loose sand dominantly quartz with black carbon material, green stone, and lithic fragments with some calcite; hydrates slowly at first than accelerates outwith water; gas background very low. (1020-1050) SAND =Dominantly dirty gray white opaque to clear quartz grains; angularto sub angular with some sub rounded grains; upper fine to lower coarse grains; poorly sorted sands; unconsolidated quartz 60- 70%, the remainder black carbonaceous material, green stone, calcite, lithic fragments, and claystone with tuffaceous claystone entrained in the sands. Background gas very low; no fluorescence no gas or oil indicators. (1050-1230) SAND =Tannish white to gray white opaque to more rare clear quartz grains; angular to sub angular medium upper to fine lower with some lower coarse grains; poorly sorted; poor to low sphericity to some fair; surface abrasions of etching, frosting; quartz at 50 to 60% with accessory of black carbonaceous material, black and tan carbonaceous shale, green stone, calcite and claystone entrained in a unconsolidated sand; no fluorescence no oil or gas indicators; gas background slowly rising at 2 - 5 units; a great deal of claystone and tuffaceous claystone with volcanic ash and glass interbedded with the sands. (1230-1260) SILTSTONE= Light gray to dark gray with blue hues and medium gray with green and tannish brown hues; crumbly to crunchy to firm tenacity; irregular fracture with wedgelike to platy cuttings habit; dull earthy to shiny luster with pyrite in some cuttings; thin structure; clayey to smooth texture. EPQCH 6 Chevron Mastodon 6-3-9 (1260-1380) SAND, SAND CONGLOMERATES = Angular to sub angular with many sub rounded cuttings; 50-60% quartz; accessories of green stone, siltstone, black carbonaceous material, some pyrites, calcites and rarer lithic fragments; one lithic fragment with possible calcite substitution; fragment has very small holes like possible for blood; vesicles; claystone increasing within samples and depth; no fluorescence or cut; no oil or gas show. (1380-1410) CLAYSTONE =Light gray to medium gray with light tannish brown hues; mushy to malleable to crumbly; hydrates quickly with volcanic ash and tuffaceous claystone entrained; sand sized quartz, black carbonaceous material, green stone and lithic fragments; irregular fracture; rounded blocky to wedgelike cuttings habit; dull earthy to slight shiny luster due to quartz entrained in claystones; clayey to smooth texture; thick structure. (1410-1440) SANDSTONE = Clear to cloudy white with grayish hues in dominant quartz; sub angular to sub rounded with some angular grains; poorly sorted low fine to upper medium grains; fair to high sphericity; quartz 50-60% with accessories of claystone, calcite, black carbonaceous material, some green stone, surface abrasions of frosting and etching; unconsolidated sands; gas background dropped off; no fluorescence, no gas oil indicators. (1410-1510) CLAYSTONE = Clear to grayish white opaque grains with light gray to medium dark gray tannish brown hues; claystone hydrates moderately to slow; moderate adhesiveness, moderate to low cohesiveness; mushy to lumpy to crumbly consistency and tenacity; irregular fracture; lumpy malleable cuttings habit; dull to slightly shiny with loose unconsolidated sands entrained; smooth clayey texture; thin structure; background gases dropped off. (1510-1680) CLAYSTONE=Light gray to medium gray with tannish brown hues; hydrates slowly and washes completely with water; malleable tenacity; irregular fracture with malleable to soft cuttings habit; dull earthy to slightly shiny luster with sands entrained; moderately adhesive and low to fair cohesiveness; claystone washes easier with water; black carbon material found in claystone along with loose unconsolidated sands with green stone, calcite and harder siltstones; claystone still exhibiting the sticky quality of gumbo, though it is washing out better; when sheared it releases its water content quickly; due to massive claystone amounts it is impossible to use a bucket method to get a more accurate stratigraphic sampling; a spot method at thirty foot intervals is being used. (1680-1710) CLAYSTONE =Light gray to medium gray with tannish brown color hues; soft mushy sticky slimy consistency; drussy filled tenacity; irregular fracture; soft rounded cutting habit; dull to slight shiny luster; soft smooth clayey texture. (1710-1800') CLAYSTONE =Very light gray to very light olive gray with light brownish shades; moderate cohesion and adhesion; generally does not swell when rehydrated; soft, mushy, rarely pasty; no definitive cuttings habit; cuttings clearing well over shaker; silty in part with occasional thinly interbedded extremely fine to fine well rounded sand grains; gross samples are calcareous; yellowish gray shell fragments, pyrite and soft carbonaceous fragments common in upper part of interval, noticeably lacking as samples become smoother and argillaceous. No sample fluorescence. (1800-1881') CLAYSTONE WITH INTERBEDDED SAND =Unconsolidated; frosted to translucent, occasionally transparent, light to light olive gray, amber grains; sub angular to subrounded in part with moderate sphericity; fine to lower medium grain; occasional yellowish gray shell fragments; interval generally very gritty; silty; no sample fluorescence • ~ EPOCH Chevron Mastodon 6-3-9 i 1891' to 4845' MD (1890.914' to 4844.562 TVD) Drill Rate ftlhr Total Gas units Maximum Minimum Avera a Maximum Minimum Avera e 228.0 9.4 145.6 140 0 11.6 (1881-1950) CLAYSTONE / SILTSTONE= Light to medium gray with green hues; soft mushy to crumbly crunchy firm almost mushy to crumbly crunchy firm almost tough tenacity; irregular fracture; rounded blocky cuttings habit; smooth clayey to gritty and rough with siltstone cuttings; thick to thin entrained; black carbonaceous material is in siltstone cuttings. (1950-2070') CLAYSTONE/TUFFACEOUS CLAY- STONE =Light gray to medium light gray in part; cohesive with poor adhesion; soft, generally mushy to pasty in part with no definable cuttings habit; dull to slightly sucrosic with extremely fine glass shards and transparent glass-like quartz grains; hydrates readily with minimum swelling; slightly silty in part with extremely fine well rounded quartz and gray to gray black magic fragments; interval very gritty, becoming more argillaceous down section with very small shell fragments starting to appear. No florescence in samples (2070-2100') CLAYSTONE =Light gray to medium gray; occasionally yellowish gray; very expansive when rehydrated; moderate cohesion and adhesion; over all smooth texture; rarely very slightly gritty; abundant very pale orange to yellowish gray shell fragments; black scale-like detritus and well rounded glass-like quartz grains common; abundant dull yellowish florescence from shell fragments; no stain or cut. (2100-2190") CLAYSTONE/SILTSTONE = Light to medium gray with slight brownish hues; soft, mushy to slightly pasty in part; moderate adhesion and cohesion; air dried samples readily hydrate and swell; generally dull to sub sucrosic with increasing silt/extremely fine grain quartz and darker mafic content; noticeable decrease in abundance and size of shell fragments; no sample fluorescence or evidence of hydrocarbons. (2190-2250') CLAYSTONE/SILTSTONE = Light to medium gray with occasional dark grayish black banding in part; generally gritty but often smooth and clean; extremely fine sand grains common; arguably an argillaceous sandstone except for grain size and abundant matrix; generally dull to subsucrosic luster; occasionally subwaxy when clean and smooth; air dried samples readily hydrate but remain cohesive; no sample florescence; no hydrocarbon indicators. (2250-2340') CLAYSTONE/SILTSTONE = Light to medium gray; occasionally darker medium gray; interval is predominately gritty with abundant extremely fine to lower fine, well rounded to angular quartz grains with very good sphericity; occasional very fine shell fragments; dominantly soft with no definable cuttings habit; generally mushy to pasty with good cohesion and adhesion; no sample florescence; no hydrocarbon indicators. (2340-2400') SANDSTONE =Light medium gray with tannish/brown shades; fine salt and pepper grains; angular to sub angular, rarely sub rounded with good sorting and good sphericity; dominantly unconsolidated in samples; some cuttings calcareous cement with abundant argillaceous matrix; grain supported in part with poor visible porosity; predominantly milky white to frosted quartz and abundant dark gray to grayish black pyritic lithic fragments; traces of olive to pale green and smokey gray lithic fragments; interval becoming more fine grain and argillaceous with depth; weak pale yellow fluorescence for hydrocarbon indicators. (2400-2460') CLAYSTONE/SANDSTONE =Light to medium gray; generally gritty to sandy with very fine to lower fine grain well rounded quartz; dull tosub-sucrosic with increasing sand; trace dark gray to grayish black clastic detritus; interval rarely smooth with non-gritty texture, dull to slightly subwaxy; no definable cuttings habit; samples very hydrous and air dry poorly; oil stains but no fluorescence for oil indicators. • EPOCH Chevron Mastodon 6-3-9 (2460-2520') CLAYSTONE/SILTSTONE =Light to medium gray; moderate cohesive poorly adhesive, generally very silty claystone with abundant extremely fine sub angular quartz; air dried samples hydrate easily and remain intact; with thinly interbedded very clean, fine grain sand; samples generally gritty and only slightly abrasive; dull to sub sucrosic luster; rarely clean and sub waxy; no fluorescence but obvious oil stains for hydrocarbon indicators. (2520-2580') ARGILLACEOUSSANDSTONE = Light to medium gray; bimodal very fine to fine well rounded to subrounded grains with good sphericity; also fine to lower medium subangular grains with poor to fair sphericity in part; very light brown to yellowish gray argillaceous matrix; interval mixed with both grain supported and matrix supported consolidation with energetic reaction to hydrochloric acid; dark grayish black clastic and fine/reworked shell fragments abundant; trace visible porosity; trace dark amber to brownish black stain, rare dull yellow/gold fluorescence, less than 10% very slow straw yellow stream cut. (2580-2670') CLAYSTONE = Light to medium gray, occasionally with occasional light to moderate brown and brownish black earthy material; dominantly gritty; silty to sandy in part with rare very fine to lower fine grain quartz; reworked very fine, rounded shell fragments common along with scaley to irregular carbonaceous fragments; trace of brownish black to dark amber oil stain; very rare dull yellow to yellow orange fluorescence; less than 5% gross sample exhibits slow gold to yellow orange cut. (2670-2760') SANDSTONE = Light to medium gray with slight greenish gray to light olive brown shades; very fine to fine subrounded to well rounded grains; dominantly matrix supported calcareous cement and argillaceous matrix; little or no visible porosity; grades to a sandy/silty claystone as grain size varies; friable; no visible oil stain; no sample fluorescence or cut. (2760-2820') CLAYSTONE/SILTSTONE = Light to medium gray with light olive gray to grayish brown shades; generally moderately cohesive and adhesive; air dried samples readily hydrate but remain intact; generally gritty and abrasive with abundant extremely fine quartz; fine irregular shaped and scaley carbonaceous fragments abundant in thin earthy layers; reworked fine, well rounded shell fragments common in lower part of interval; gross sample calcareous; occasional visible oil stain; rare dull yellow orange fluorescence; very slow yellow cut. (2820-2880) SANDSTONE/SILTSTONE =Light gray, medium gray with slight brownish shades; very fine to medium salt and pepper subrounded to subangular grains; dominantly quartz with abundant fine irregular pyritic lithic fragments; elongated to scaly carbonaceous fragments and reworked shell remains; interval pre- dominantly matrix supported, grading to a sandy/silty claystone; often with thin interbedded clean sandstone stringers with white to very light gray matrix; calcareous; slight visible oil stain; weak shell fluorescence; no odor or cut (2880-2970) CLAYSTONE/SILTSTONE =Medium light gray with olive and brown hues; black laminations in claystone with loose unconsolidated sands; black laminations as possible oil stains are increasing and break in a crumbly manner seen as larger oil stains with some remnants of dried oil that has a weak yellow fluorescence to a brighter pale streaming yellow fluorescence when left in a solvent solution; fragments of lithic shell have a soft weak orange fluorescence; soft to crumbly to almost firm claystone cuttings; irregular fracture with soft rounded blocky cuttings habit; smooth to gritty with siltstone entrained and rough with very fine unconsolidated sands in claystone cuttings; gas background very low and spotty; continuing to drop carbide into well to confirm gas system integrity. (2970-3030) SAND/SANDSTONE/SILTSTONE =Medium gray with black streaks, laminations and regular stains in the sandstone, claystone/unconsolidated sand mix; siltstone is light gray to dark gray with a dusky blue hue; sands dominantly quartz with accessories of chlorite quartz, black stain, calcite and small siltstone cuttings; claystone is firming up; siltstone is very firm to tough in tenacity;. sandstones are firm moderately indurated grain supported upper fine to lower medium grain poorly sorted to moderately sorted; sub angular to sub rounded grains; matrix is argillaceous: little reaction hydrochloric acid; background gases spotty; claystone • reducing reducing towards siltstone; numerous oil stains; pale yellow fluorescence. EPOCH 9 Chevroe Mastodon 6-3-9 n U • ~~ °' ~ ~ ~.:: *BLACK AND WHITE OF SAND/SANDSTONE/SILTSTONE AT 2970 FT. (3030-3110) SAND =Clear to rarer dusky grayish to tannish white opaque grains; fair to poorly sorted sub angular to sub rounded grains; upper fine to lower medium grain size; unconsolidated sands with accessories of green stone, siltstone, claystone; fair to moderate sphericity; some surface abrasions of frosting and etching; gas background still spotty 2 to 5 units. (3110-3270) SILTSTONE =Medium gray to gray with brownish to black stain and gray with tan or slight green hues; dominantly crumbly to crunchy firm tough tenacity; irregular fracture; blocky cuttings habit; dull earthy waxy luster gritty to rough texture with large amounts of sand entrained in siltstone; thick to thin structure; claystone diminishing rapidly; background gases rising 10-42 units; numerous oil stains with pale yellow fluorescence and strong streaming cut. .. f ~- • ~~ EPOCH 10 * PYRITE ENCRUSTED CARBONACEOUS MATERIAL AT 3120 FT. Ehevron Mastodon 6-3-9 (3270-3330) SILTSTONE =Light gray to medium gray with green olive hues and brown to black oil stains throughout; soft to crumbly to firm tenacity; soft to firm irregular except where fracture is along plane of oil stains; rounded blocky cuttings habit; dull to slight waxy luster; gritty texture with thick to thin structure; gas background remains 10 to 17 units; slight positive fluorescence: soft orange fluorescence and pale yellow cut from oil stains. (3330-3390) SILTSTONE =Light gray to medium gray with green olive hues and brown and black oil stains; soft to moderately firm to crumbly with interbedded laminations of black and brown oil stains; some loose sands poorly sorted and green stone in the siltstone; irregular fracture except along stain laminations; round blocky cuttings habit; gritty to rough texture with sands entrained; dull earthy luster; thick to thin structure; oil stains; gases slightly higher in sands; sands; pale yellow fluorescence. (3390-3480) SAND/SANDSTONE =Dominantly clear quartz grains to dusky grayish white opaque grains; loose sands are unconsolidated but by 3420 ft the argillaceous matrix is indurated and sandstone is grain supported with sub angular to sub rounded grains; fairly well sorted both sand and sandstone; abundant dark carbonaceous stains or possibly carbonaceous shales mixed through out; sphericity fair to well to low; pale yellow fluorescence oil stains; gas rising slowly. (3480-3540) SILTSTONE =Medium gray to gray with green olive hues and brown black oil stains; soft to crumbly to occasionally firm tenacity; irregular fracture; rounded blocky cuttings habit; with a gritty to slightly rough texture due to loose unconsolidated sands and irregular dark carbonaceous crumbly layer throughout the cuttings; some single cuttings have a firm dark brown to black coaly appearance; dull earthy luster; thick structure; gas back ground is stable around 5 - 17 units; slight pale yellow fluorescence. (3540-3600) SILTSTONE =Medium gray to gray with green and brown hues; black oil stains, some loose unconsolidated sands with clear quartz, green stone, and black carbonaceous material; irregular fracture; rounded blocky cuttings habit; gritty texture slight roughness with protruding quartz grains in siltstone cuttings; dull waxy luster; thick structure; gas 5-17u. Oil stains pale yellow fluorescence. (3600-3690') SILTSTONE =Light gray to medium light gray; very light olive gray to very light pale yellowish brown in part; very argillaceous to often sandy; generally firm with blocky to lumpy cuttings habit; dominantly dull but occasionally sub-sucrosic when sandy, subwaxy when more argillaceous; occasionally earthy with abundant carbonaceous detritus as fine elongated fragments to scale-like remains; air dried samples hydrate easily but remain intact; dark yellowish brown to black staining/streaks common; no sample fluorescence or odor; introduction of solvent indicates rare, very slow gold to yellow orange fluorescence with no streaming cut. (3690-3780') CARBONACEOUS SHALE = Brownish black to dusky yellowish brown, pale to dark yellowish brown; dominantly with black elongated to scaly carbonaceous fragments and very soft, platy carbonaceous laminae; dull, subwaxy in part, massive; also earthy, slightly silty in part; generally firm, often curdy, occasionally platy to sub-fissile; argillaceous in part; slightly calcareous; good visible oil stain; no sample fluorescence or odor; introduction of solvent shows less than 5% very slow gold to dull yellowish orange fluorescence with no stream cut. (3780-3870') CLAYSTONE/SILTSTONE = Medium light gray to light olive gray, pale yellowish brown in part; firm; good cohesion and adhesion; mushy but not gummy; amount of silt and sand varies through interval; often with thinly interbedded very fine to fine grain quartz and medium dark to dark gray lithic fragments; pyrite common; carbonaceous to shaley in part; often gritty, abrasive; occasionally earthy; rarely massive or subwaxy; slightly calcareous; occasional light brown to moderate yellowish orange waxy particles; occasional oil stains; weak fluorescence. (3870-3940) SAND/SANDSTONE =Light gray to medium gray with a two tone coloring of light gray to blackish dark gray to parts of reddish brown color; sand is friable silty cutting that crumble and sandstone that is matrix supported and indurated and not easily sheared; quartz grains are transparent with some frosting and grayish • white opaque color; loose unconsolidated sands and sandstone is very fine well sorted sub angular to almost rounded; matrix is argillaceous. EPOCI~ 11 Chevron Mastodon 6-3-9 . (3940-4020) SILTSTONE =Light gray to medium with green olive hues to a light tan brown color with olive hues; crunchy crumbly to very firm to tough tenacity; irregular to splintery fracture when very tough; grading from or having sand entrained; some siltstone has sandstone embedded within; very gritty to rough with loose unconsolidated sands or indurated with sandstone; hick to thin structure; background gases slowly rising; black to dark brown oil stains or carbonaceous materials entrained in siltstones ; no fluorescence or oil indicators. (4020-4080) SAND/SANDSTONE =Dominantly clear to dirty grayish white opaque color; well sorted with sub angular to almost rounded quartz grains; upper very fine to lower fine grain size; argillaceous matrix in matrix supported to fine grain supported sandstone; loose unconsolidated upper very fine to lower fine grain well sorted dominantly quartz grains; both sand and sandstone have accessories of green stone, black carbonaceous material, siltstone, some calcites, rare white kaolinite sandstone with upper fine to lower medium grains could have fallen from above; gas remains 7-21 U.; pale yellow fluorescence; numerous oil stains ;grains appear to be reducing to very fine upper to lower; siltstone increasing. (4080-4200) SILTSTONE =Light gray tan brown hues; black brown oil stains; siltstone carries loose unconsolidated quartz sands; crumbly crunchy to very tough tenacity to indurated hard silty sandstone to very fine sized sandstone; irregular fracture; rounded blocky cuttings habit; dull to slight shiny luster; numerous pyrites on siltstones; gritty to rough texture with loose sands sandstone entrained; light oil stains; weak orange pale yellow fluorescence; gas background 8-25 units; thick structure. ~- . . I GRAIN SUPPORTED SANDSTONE WITH KAOLINITIC MATRIX AT 4140 FT. (4200-4290) SAND/SANDSTONE =Light brown to a brilliant white kaolinitic matrix to a salt and pepper tan and black sandstone; dominantly quartz in loose unconsolidated sands entrained in soft crumbly siltstone; sandstone dominantly matrix supported with some white kaolinite sandstone cuttings; sandstone fair to moderately sorted sub angular to sub rounded to rounded grains; moderate to very good sphericity; seeing an increase of oil stains in the siltstone and sandstone cuttings; a pale golden yellow fluorescence with a pale yellow cut; gas is rising; connection gases are now seen. ~~ EPOCH 12 Ctrevro» Mastodon 6-3-9 (4290-4410) SAND/SANDSTONE = Clear to green translucent to grayish white opaque grains; angularto sub rounded to some rounded grains in a very fine silty sandstone; poor to fair sorted; very fine to lower medium angular sandstones in a grain supported sandstone cuttings; increasing dark brown to black oil stains; sandstone cuttings well indurated to some friable and crumbly; good visible porosity and yellow golden fluorescence at 4290 feet; gas background up and rising above 40-50 units; sand sandstone increasing overall. (4410-4500) SAND/SANDSTONE =Increasing oil stains; sandstone dropping off as the matrix is softening; sand increasing poorly sorted entrained in a siltstone claystone matrix; sandstone decreasing by 4440 feet; angular to sub angular to some sub rounded grains; sphericity low to fair; sandstone poorly sorted; with accessories of black carbonaceous material, calcite, greenstone, and pale orange lithic fragments; good visible porosity; mostly friable to some indurated but diminishing rapidly; no visible fluorescence or cut; gas background rising and falling rapidly; sand increasing by 4470 feet with some sandstone present in upper fine to lower medium grain; angularto sub angular good visible porosity in sandstones. (4500-4560') SANDSTONE/SILTSTONE =Light to medium light gray, abundant very light gray white slight brownish shades, becoming somewhat darker down section; very fine to fine well rounded to sub-rounded grains with good sphericity; often fine to lower medium subangulargrains/fragments with poor sphericity; fair to moderate sorting with abundant argillaceous matrix, occasionally white to very pale orange to yellowish gray clay matrix; often silty to slightly earthy in part; calcareous with evidence of calcite filled fractures; occasional visible black to brownish black streaks; rare bright yellow florescence; 5-10% gold to bright yellow florescent reaction with solvent; no stream cut. (4560-4680') SILTSTONE AND CARBONACEOUS SHALE =Shades of medium gray to light olive gray with light brown to yellowish brown; generally dull, silty to argillaceous, soft, curdy with fair cohesion and moderate adhesion; also firm, dense, blocky, irregular fracture, occasionally platy to sub-fissile, often sparkly but sub- waxyluster common; very fine shell fragments common along with scaley to wedge-like black carbonaceous fragments; very fine blackish brown streaks prevalent through interval black, elongated, fissile carbonaceous fragments are rare but noteworthy; samples rarely (a few pieces) exhibit florescence; solvent provides less than 5% slow yellow and yellow orange florescence with no stream cut. (4680-4770') CARBONACEOUS SHALE =Light gray to dark yellowish gray with various shades of brown/tan; generally argillaceous, slightly silty in part; dominantly soft, dull white fair to moderate adhesion and cohesion; commonly firm to rarely moderately hard, massive to blocky with well defined cuttings habit; occasionally platy; abundant very fine shell fragments; black to blackish brown streaks; fine fragment and scaly carbonaceous detritus abundant; micro thin alternating white to very light gray laminae; non to slightly calcareous; staining is visible with no sample florescence; staining in solvent raises less than 5% bluish white florescence with no stream cut. (4770-4845') CARBONACEOUS SHALE =Light olive gray to yellowish brownish gray; generally soft, argillaceous to very slightly silty in part; very fine, reworked shell fragments and carbonaceous detritus common; occasionally with interbeded layered black to brownish black soft, mushy carbonaceous material; interval also indicates firm; blocky; non-gritty; sub-waxy with well defined tabular cuttings typical of PDC bit habit; no sample fluorescence; rare bluish white solvent florescence with no stream cut. EPOCH 13 Chevron Mastodon 6-3-9 • 3.2 Connection Gas Summary 1unit = 0.05% Methane Equivalent De th Gas over BGG Measured Strokes Bottoms Up feet units pum strokes (um strokes 19UNITS, 3 UNITS AND 6 UNITS 3.3 Trip/Wiper Gas Summary 1 Unit = 0.05%, Methane Equivalent De th Tri to Gas Downtime feet feet units hours 3884 9 5/8" shoe 20 11.7 4845 3500 18 3.5 3.4 Sampling Program /Sample Dispatch Set Proccessed As Frequency Interval Dispatched to Chevron, USA Washed dried ' ' ' 909 West 9th Avenue A,B,C , , envelopes 30 - 4845 MD 85 P.O. Box 196247 Anchorage, Ak 99518-6247 Att: David Buthman/Trac Win er EPOCH Well Services, Inc. D Washed Wet 30' 85' to 4845' MD 1615 Jefferson Island Rd. Whirlpak New Iberia, La 70560 For QFII Analysis Chevron, USA Zones of As dictated by Chevron 909 West 9th Avenue E Iso-Tubes gas Interest. Geologist P.O. Box 196247 Anchorage, Ak 99518-6247 Att: David Buthman/Trac Win er Chevron, USA Zones of As dictated by Chevron 909 West 9th Avenue F Iso-Jars Interest. Geologist P.O. Box 196247 Anchorage, Ak 99518-6247 Att: David Buthman/Trac Win er Sample frequency may be altered according to drill rate constraints and zones of interest. ~I EP4CH 14 Chevron Mastodon 6-3-9 4 DRILLING DATA 4.1 Daily Activity Summary: 02/25-03/01/08: Nabors Alaska Drilling, Rig 106E moves from Chevron Smilodon Pad to Chevron Mastodon Pad approximately 5.5 miles away on ice road. Epoch mud logger arrives on location and energizes ML014 on 03/01/08. 03/02/08: Continue rigging Nabors 106: Hang torque tube and service loop in derrick. Continue installing berms; insulating rig and thawing suction valves in pits; repair air boots in all pits. Run cement line and. assist Halliburton with their rig up operations. Install Koomey lines and lock down well head. Continue setting up pits and installing shaker screens. Install bails in top drive, hookup hydraulics and function test top drive. Nipple up diverter flange and BOP's; install knife valve and diverter line. Install kill and choke side HCR and Manuel valves. Install riser; air up boots. Rig up tongs and air spinners. Set crown saver at 76 ft.. 03/03/08: Put elevators on and hookup Kelly hose to top drive. Blow through all lines and equipment. Hook up the fill line, kill line, and choke line. Test alarms on H2S, and gas. Continue to rig up by swapping out the Koomey lines on knife valve, and finish installing shaker screens. Hook up choke line, and cement line. Load pipe shed with 62 joints of drill pipe and 2 4 joints of heavy weight drill pipe. Begin cleaning house. Add new fluid for the pits. Pick up 11 stands of drill pipe and rack back. Pick up 20 stands of 4" drill pipe and 12 stands of 4" heavy weight and stand back in derrick. Test lines to 200 psi. Test fluid diverter at knife valve and strap the Bottom Hole Assembly. Blow down all lines, and install safety clamps on cement line. Rig up tongs and handling equipment. Pickup mud motor and bit in preparation to trip in hole. Tag bottom at 84 ft. 03/04/08: Rig up completed. Spud well at 85 ft. on March 4, 2008 at 0200 hrs. Drill ahead from 85 ft. to 306 ft. Circulate and condition hole. Pull out of hole for BHA: stabilizers, ARC 8, drill collars. Test MWD and wash to bottom on HWDP. Drill ahead to 691 ft., checking for flow at every connection. 03/05/08: Drill ahead from 691 ft. to 1040 ft. Flow line packs off with cuttings. Work pipe and clean flow line by varying pump rates --with pumps off at times-- to clear flow line. Drill ahead from 1040 ft. to 1650 ft. Rig looses power when generator motor #2 overheats. Drill ahead from 1650 ft. to TD at 1881 ft. Circulate 3 bottoms up. Pump carbide: Expected round trip of 3550 STKS; get back main gas early at 2600 STKS and second peak at 5800 STKS. Downlink LWD and monitor hole for 10 minutes. Begin pulling out of hole for wiper trip. ~~ EPOCH 15 Chevrcin Mastodon 6-3-9 • 03/06/08: Pull out of hole for wiper trip. Pull 20k over at 1614 ft, 1594 ft, 1560 ft, 1514 ft. Pull out to top of HWDP. Run back in hole to 1881 ft. with no problems. Circulate 10 minutes; pack off flow line and flow box. Clean flow line and circulate slowly to clear packed off material. Establish circulation and clean hole 4 times around. Drop carbide: Expected round trip 3550 STKS; get main gas back at 3800 STKS and second peak at 8750 STKS. Downlink LWD. Drill ahead from 1881 ft. to 1890 ft. for extra rat hole. Circulate bottoms up; lay down 1 joint of drill pipe; blow down top drive. Pull out of hole from 1890 ft. at 900 ft/hr with no problems. Lay down smart tools. Make ready to run 9 5/8" casing. 03/07/08: Rig tools to run casing. Pull wear ring and make dummy run with hanger. Commence to run 9 5/8 inch 40# casing to 1847 ft. Make up landing hanger. Circulate and condition mud. Rig up lines and test to 2000 psi. Circulate two bottoms up at 8 barrels per minute, and 400 psi pump pressure. Rig down casing tools. Blown down all lines while circulating bottoms up and monitoring well. Continue to rig up for cementing job. Screw in landing joint and make up cement head. Continue to circulate. Run up cement lines and test to 4000 psi. Pump 180 bbls lead at 10.7 pounds and 45 bbls tail at 15.9 pounds. Displace 17.75 bbls of drilling mud. 03/08/03: Circulate out cement. Flush kill and choke; blow down top drive. Trip out of hole from 1870 ft; lay down stab-in tool; drain stack. Make up wash down tool and flush stack; blow down top drive. Make up pack off running tool; test same. Change liners in i mud pumps to 6". Nipple down diverter system and nipple up BOP's. Hook up hydraulic lines to BOP's; remove diverter and adaptor from cellar. Close diverter door and tighten same. Install Koomey lines. Make up test joint; can not get test plug to set. Annular valves are plugged. Rig up high pressure hose to back flush around pack off. 03/09/08: Completion of BOP tests: Koomey, blinds, lower rams, dart valve. Blow down lines. Pressure test 9 5/8" casing/shoe at 2000 psi for 30 minutes. Epoch records and charts all tests. Pick up 55 joints of drill pipe; tag cement at 1740'. Shut down and clean up cuttings tank area and cellar. Cut/slip drill line and service top drive. Change out mud system: 115 bbls. Trip out of hole. Pick up BHA and trip in hole with 5 stands HWDP. Attempt to cycle tool and find malfunction with radiation source/tool. Trip out of hole at 6 minutes per stand while checking for radiation. 03/10/08: Continue building BHA: Load nuclear sources, pick up collars and jars. Run in hole to 983' and shear out cold mud. Pick up drill pipe from 983' to 1720'. Shear out old mud and wash down to 1786'. Drill out float collar at 1786', cement, and drill new hole to 1915'. Short trip from 1915' to 1816'. Blow down top drive. Run FIT and LOT: No leak off at EMW = 15.6 PPG. Epoch records and charts LOT. Run in hole to 1915' and drill ahead. • EPOCH 16 Chev-on Mastodon 6-3-9 i 03/11/08: Drill ahead from 2412 ft. to 3043 ft. Circulate two bottoms up and pump high vis sweep. Hole cleaned up well. Short trip from 3043 ft. to 1820 ft. Pulled 18k over at 2970 ft., 2900 ft., 2563 ft.; 10k over at 2109 ft. Conduct BOP drill; shut well in at 1:30 minutes. Service top drive. Run in hole from 1820 ft. to 3043 ft. Circulate bottoms up and resume drilling from 3043 ft. to 3493 ft. Controlled drilling per Geologist from 3493 ft. to 3879 ft. Circulate 2 bottoms up. Pull out of hole from 3879 ft. checking tool joint torque. Epoch tests gas detection equipment at 0055 hrs (2469'); dropped carbide during connection at 0355 (2655') with 147 Unit reading {typical}. Observed very low but steady background gas traces from 0400 (2770') and continue to carry low background gas through reminder of today's drilled interval. No connection gasses were recorded. 03/12/08: Continue wiper trip from 3429 ft. to 1820 ft. checking tool torque. Remove and replace top drive encoder. Continue to pull out of hole to 215 ft. checking torque on tool joints. Run in hole from 215 ft. to 3859 ft. Tag 20' of fill. Wash and ream from 3859 ft. to 3879 ft. Drill ahead from 3879 ft. to 4845 ft. Circulate bottoms up; circulate and condition hole. 03/13/08: Short trip from 4845 ft. to 3366 ft; wash from 4523 ft. to 4459 ft. Run back in hole; wash and ream from 4781 ft. to 4845 ft. Epoch records 18 units of down time gas from wiper trip. Drop carbide and confirm hole is in gage. Pump high vis sweep. Download LWD and start out of the hole. Lay down smart tools per Schlumberger. Rig up Baker and run Sonic MREX Caliper. Change mud pump liners to 6". Continue general house keeping and plan ahead for rig move. 03/14/08: Continue running Sonic MREX Caliper log. Pickup rotary core logging tool and run in hole. Rotary core log from 2160 ft. to 2440 ft. Remove cores and change out mandrill. Recover 32 cores. Continue rotary coring from 2440 ft. to 3670 ft. 03/15/08: Continue running Baker rotary core tool from 3670 ft to 3000 ft. Pull out of hole with Baker tool from 3000 ft.; lay down same and recover cores. Pick up Baker RCI tool. Log hole from 4510 ft. Test BOP's. Lay down logging tool after run. Complete testing BOP's. Epoch records and charts test results. 03/16/08: Complete BOP testing; lay down test tool. Service rig top drive; work on frozen kelly hose. Pick up drill tools and conveyed formation tool; run in hole to 1826 ft. Circulate and condition; rig up wireline sheave in derrick. Continue running in hole from 1826 ft. to 2631 ft. Rig up side entry sub. Run in hole with wireline to latch in; latch tool and verify. Clamp wireline to side entry sub and rig up additional wireline sheaves. Move to 2713 ft. and continue logging. • ~I EPOCH ~' Chevron Mastodon 6-3-9 03/17/08: Continue logging with drill pipe conveyed tool at 2726 ft. Relax straddle packer; monitor well. Run in hole from 2726 ft. to 3043 ft and log interval. Run in hole from 3043 ft. to 3440 ft,; log interval. Complete log, work packer free, break circulation and circulate bottoms up. Move tool down hole from 3440 ft. to 3523ft. Pull out of hole from 3523 ft. to side entry sub at 2631 ft.. Lay down third party tool and rig down side entry sub. Continue out of hole from 2631 ft. to shoe. Blow down top drive; check well for flow. Continue out of hole from shoe to BHA. Lay down logging tools. 03/18/08: Service rig while on the bank. Run in hole to 1837 ft.; break circulation. Continue to trip in hole from 1837 ft. to 3446 ft.; break circulation. Continue trip in hole from 3466 ft. to 4154 ft. Wash and ream from 4154 ft. to 4669 ft. Ream tight spots from 4669 ft. to bottom. Circulate 2 bottoms up and record 33 units of trip/down time gas. Pump 13 bbl slug at 1.5 ppg over. Pull out of hole and work pipe through tight spots. Pull out of hole from 4283 ft. to 1322 ft. Check for flow at shoe; blow down top drive. 03/19/08: Continue pulling out of hole from 1322 ft. Lay down bit and BHA. Pickup Baker sample logging tool and run in hole to 788 ft. Service rig due to extreme cold (> -50F). Replace 2 hydraulic hoses; thaw tube oil. Continue trip in hole from 788 ft. to 1817 ft. Circulate and condition. Resume trip in hole from 1817 ft. to 3684 ft. Pick up third party tools: Rig upside entry sub and pump latch head down; function tools. Continue to run in hole from 3684 ft. to 4462 ft. Continue open hole logging. Pull out of hole from 4462 ft. to 3680 ft. and continue open hole logging. 03/20/08: Continue open hole logging at 3860 ft. Move tool up hole from 3860 ft. to 3704 ft.; continue logging. Complete logged interval and lay down side entry sub. Trip out of hole from 3704 ft. to 1817 ft. Rig up side entry sub; check latch and function tool. Run back in hole from 1817 ft. to 2380 ft; log interval. Pull out of hole from 2380 ft. to 1817 ft. Remove side entry sub and rig down wire line sheave. Continue out of hole; lay down tools. Run in hole with seismic tool on wire line. 03/21/08: Log out of hole with seismic tool. Lay down tool and prepare to run 3 1/2" 9.20# liner. Run same to 1845 ft. Circulate and condition mud. Continue running liner from 1845 ft. to 3223 ft. Change out power tongs and elevators. Make up hanger. Run in hole with 4 stands HWDP from 3223 ft. to 3471 ft. Circulate liner volume. Run liner from 3471 ft. to 3781 ft. • EPOCH Chevron Mastodon 6-3-9 4.2 Survev Data C,..J • Measured Depth ft Incl. (deg) Azim. (deg) True Vertical Depth (ft) Northings (ft){+N/-S} Eastings (ft){+E/-W} Vertical Section ft Dogleg Rate /100ft 177.49 0.19 209.08 177.49 -0.26 -0.14 -0.14 0.11 295.76 0.42 200.7 295.76 -0.83 -0.39 -0.39 0.20 415.06 0.15 234.88 415.06 -1.33 -0.67 -0.67 0.26 479.76 0.52 217.32 479.75 -1.62 -0.92 -0.92 0.59 600.66 0.56 213.93 600.65 -2.54 -0.92 -1.58 0.59 722.86 0.59 216.58 722.84 -3.54 -1.58 -2.29 0.04 844.76 0.51 213.69 844.74 -4.50 -2.29 -2.97 0.03 969.76 0.61 216.98 969.73 -5.49 -2.97 -3.68 0.07 1099.26 0.63 203.69 1099.22 -6.69 -3.68 -4.38 0.08 1228.86 0.67 184.32 1228.82 -8.10 -4.38 -4.72 0.11 1357.46 0.63 188.33 1357.41 -9.55 -4.72 -9.55 0.17 1484.56 0.67 198.55 1484.50 -10.95 -4.88 -5.22 0.05 1614.36 0.61 197.99 1614.29 -12.32 -5.22 -5.67 0.10 1744.16 0.61 191.81 1744.08 -13.66 -6.03 -6.03 0.05 1818.09 0.71 194.41 1818.01 -14.49 -6.22 -6.22 0.14 1937.19 0.74 192.55 1937.1 -15.95 -6.57 -6.57 0.03 2066.29 0.78 184.55 2066.19 -17.64 -6.82 -6.82 0.09 2195.50 0.59 203.82 2195.39 -19.13 -7.16 -7.16 0.23 2324.32 0.63 187.6 2324.20 -20.44 -7.52 -7.52 0.14 2452.62 0.52 196.74 2452.50 -21.69 -7.78 -7.78 0.11 2580.84 0.80 194.28 2580.71 -23.12 -8.17 -8.17 0.22 2711.15 0.78 197.11 2711.00 -24.85 -8.66 -8.66 0.03 2838.98 0.82 185.24 2838.82 -26.59 -9.00 -9.00 0.13 2967.68 1.00 194.77 2967.51 -28.59 -9.37 -9.37 0.18 3094.98 0.75 198.53 3094.79 -30.49 -9.97 -9.97 0.21 3223.68 0.67 193.14 3223.48 -32.05 -10.10 -10.10 0.07 3352.48 0.66 216.02 3352.27 -33.38 -10.71 -10.71 0.20 3482.18 0.73 200.95 3481.96 -34.76 -11.44 -11.44 0.15 3610.48 0.66 200.35 3610.25 -36.22 -11.99 -11.99 0.05 3738.58 0.73 211.97 3738.34 -37.60 -12.68 -12.68 0.12 3867.67 0.74 200.86 3867.42 -39.08 -13.41 -13.41 0.11 3996.67 0.55 214.27 3996.41 -40.37 -14.06 -14.06 0.19 4124.77 0.79 216.34 4124.50 -41.59 -14.93 -14.93 0.19 4253.37 0.61 220.48 4253.10 -42.82 -15.90 -15.90 0.15 4382.77 0.66 230.15 4382.49 -43.82 -16.91 -16.91 0.09 4446.37 0.63 229.24 4446.08 -44.29 -17.46 -17.46 0.05 4512.29 0.77 235.74 4512.00 -44.77 -18.10 -18.10 0.24 4640.99 1.36 245.68 4640.68 -45.89 -20.21 -20.21 0.48 4770.19 2.25 237.06 4769.81 -47.90 -23.73 -23.73 0.72 4845 p. 4844.56 ~ EPOCH 19 Chevron Mastodon 6-3-9 4.3 Bit Record Bit Size Type Ser. No. Jets In Out Ftg. Hrs. Wear Reason 1 12.25 HUGHES 5140070 3X16 1X14 85' 1881' 1796' 26.0 0 0 NO,A Casing MX-L1X , LL,E,1/16 2 8 50 HYCALOG 206365 4X12 1890 4845' 2955' 1 22 2,3 C,A,N TD . DS619S-A3 . , I, WT • ~ EPOCH 20 ! ~ Mastodon 6-3-9 4.4 Mud Record Contractor: BAROID Date Depth MW (ppg) FLT ( F) VIS (s/qt) PV YP Gels FL (cc) FC Sols (/°) NAP/VII Ratio Sd (/°) MBT pH CI- (ml/I) Ca+ (ml/I) 03/03/08 85' 8.80 48 95 25 32 20/42/57 14.0 2 3.2 -/96.4 -- 20.0 8.80 2.3k 120 03/04/08 645' 9.00 85 77 12 25 24/47/52 12.0 1 5.0 1.0/93.7 0.75 20.0 8.80 1.5k 120 03/05/08 1840' 9.65 94 102 17 27 28/42/85 8.4 1 9.9 0.5/89.4 0.75 20.0 8.20 .95k 120 03/06/08 1890' 9.40 68 48 13 16 11/39/52 8.2 2 8.1 1.0/90.7 0.50 22.5 8.00 .8k 120 03/07/08 1890' 9.45 63 46 11 17 11/38/54 8.4 2 8.5 1.0/90.3 0.50 22.5 8.00 .72k 120 03/08/08 Date De th p MW (ppg) FLT (°F) VIS (s/qt) PV YP Gels FL FC Sols (%) NAP/VU Ratio Sd ° (/°) MBT Ph CI- (ml/I) Ca+ (ml/l) 03/09/08 1890' 8.60 53 47 8 14 4/6/7 10.4 1 0.0 -/97.9 -- -- 8.20 24k 160 03/10/08 2125' 8.85 64 40 8 14 4/6/7 6.5 1 1.4 -/96.0 -- -- 9.40 31 k 120 03/11/08 3854' 8.90 65 44 10 17 5/7/8 5.0 1 1.8 -/95.0 0.10 3.8 9.20 30k 200 03/12/08 4717' 9.10 65 47 14 19 5/11/14 4.6 1 3.4 -/94.2 0.30 5.0 8.70 29k 180 03/13/08 4845' 9.15 63 48 14 22 7/11/14 4.8 1 3.3 0.5/94.0 0.40 5.0 8.60 27k 180 03/14/08 4845' 9.15 51 53 15 21 6/8/10 4.4 1 3.2 0.5/94.0 0.50 5.0 8.70 28k 240 03/15/08 4845' 9.20 53 44 13 16 4/7/10 4.6 1 3.5 0.5/93.6 0.40 5.0 8.70 29.5k 240 03/16/08 4845' 9.15 51 47 14 18 5/7/9 4.8 1 3.5 0.5/93.7 0.40 5.0 8.70 28.5k 240 03/17/08 4845' 9.15 57 48 13 20 5/7/9 5.0 1 3.5 0.5/93.7 0.40 5.0 8.70 28.5k 240 03/18/08 4845' 9.25 58 51 17 20 5/8/10 5.2 1 3.9 0.5/93.2 0.40 5.0 8.70 29.5k 260 03/19/08 4845' 9.35 58 51 17 20 6/8/10 5.6 1 4.7 0.5/92.4 0.40 5.0 8.80 29.5k 220 03/20/08 4845' 9.25 63 49 14 18 5/7/9 6.0 1 4.3 0.5/93.0 0.50 5.0 8.70 27k 200 03/21/08 4845' 9.25 58 52 15 20 5/7/9 5.2 1 4.3 0.5/93.0 0.50 5.0 8.7 27k 320 Abbreviations MW =Mud Weight WL =Water or Filtrate Loss Ca =Hardness Calcium YP =Yield Point Gels =Gel Strength CI =Chlorides PV =Plastic Viscosity FLT =Flow Line Temp Sand =Sand content ECD =Effective Circulating Density VIS =Funnel Viscosity FC =Filter Cake Sols =Solids NAP/W =Oil to Water ratio EP(JCH 21 • • MORNING REPORTS EPQCH 22 • • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPOCH Mastodon 6-3-9 REPORT FOR Floyd Hurt, Abe Purugganan DATE Mar 04, 2008 DEPTH 691.' PRESENT OPERATION Drilliong Ahead TIME 2359 hrs YESTERDAY 85' 24 HOUR FOOTAGE 606' CASING INFORMATION 16" @ 85' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH 177.49' 0.19 209.08 177.49' 295.76' 0.42 200.70 295.76' SURVEY DATA 415.06' 0.15 234.88 415.06' 539.96' 0.55 217.93 539.95' 600.66' 0.56 213.93 600.65' BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN 1 12 1/4" HUGHES MX-L1X 5140070 3 x 16, 1 x 14 85' 691' 10.8 DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 197.1 @ 99 1.0 @ 307 77.6 106.8 FT/HR SURFACE TORQUE 11882 @ 557 2624 @ 130 7123:1 11404 AMPS WEIGHT ON BIT 23 @ 355 1 @ 98 7.9 12.3 KLBS ROTARY RPM 117 @ 516 47 @ 108 93.7 115 RPM PUMP PRESSURE 1361 @ 680 421 @ 89 1080.4 1345 PSI DRILLING MUD REPORT DEPTH 645 MW 9.0 VIS 77 PV 12 YP 25 FL 12 Gels 24/47/52 CL- 1500 FC 1 SOL 5 SD .75 OIL MBL 20 pH 8.8 Ca+ 120 CCI MWD SUMMARY INTERVAL 85' TO Current TOOLS Tri-cone bit with mud motor and LWD: Gamma, Resistivity, Porosity, D & I GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS 103 @ 275 0 @ TRIP GAS n/a CUTTING GAS @ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY 0 METHANE (C-1) 351 @ 151 117 @ 181 14.5 CONNECTION GAS HIGH 0 ETHANE (C-2) 0 @ @ AVG PROPANE (C-3) 0 @ @ CURRENT BUTANE (C-4) 0 @ @ CURRENT BACKGROUND/AVG 0 PENTANE (C-5) 0 @ @ HYDROCARBON SHOWS Gas readings reported are from carbide tests of gas equipment. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY Permafrost PRESENT LITHOLOGY ---------Clays and Sands, occasional coal, conglomerate---------- DAILY ACTIVITY Rig up completed. Spud well at 85' on March 4, 2008 at 0200 hrs. Drill ahead from 85' to 306'. Circulate and condition hole. SUMMARY Pull out of hole for BHA: stabilizers, ARC 8, drill collars. Test MWD and wash to bottom on HWDP. Drill ahead to 691', checking for flow at every connection. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC DAILY COST DML $4550, RW $1825 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS\... 3/5/2008 • Daily Report Page 1 of 1 Chevron USA REPORT EPOCH White Hills Project DAILY WELLSITE Mastodon 6-3-9 REPORT FOR Floyd Hurt, Abe P urugganan DATE Mar 06, 2008 DEPTH 1881' PRESENT OPERATION TD: Prepare for wiper trip TIME 2359 hrs YESTERDAY 681' 24 HOUR FOOTAGE 1200' CASING INFORMATION 16" @ 85' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH 844.76' 0.51 213.69 844.74' 1228.86' 0.67 184.32 1228.2.82' SURVEY DATA 1614.36' 0.61 197.99 1614.29' 1776.16' 0.60 191.35 1776.08' 1881.9' prof 0.6 191.35 1881.82' prof BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN 1 12 1/4" HUGHES MX-L1X 5140070 3 X 16, 1 X 14 85' 1881' 1796' 26.0 Csg Pt. DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 151.1 @ 1450 12.3 @ 1101 87.8 63.5 FT/HR SURFACE TORQUE 12887 @ 1764 2685 @ 1131 8441.1 11183 AMPS WEIGHT ON BIT 29 @ 1589 1 @ 1211 13.2 19.5 KLBS ROTARY RPM 126 @ 1143 37 @ 1131 112.8 120 RPM PUMP PRESSURE 2043 @ 1754 1324 @ 692 1755.2 2016 PSI DRILLING MUD REPORT DEPTH 1840' MW 9.6+ VIS 102 PV 17 YP 27 FL 8.4 Gels 28/42/85 CL- 950 FC 1/- SOL 9.8 SD 75 OIL MBL 20 pH 8.2 Ca+ 120 CCI MWD SUMMARY INTERVAL 85' TO 1881' TOOLS Tri-cone bit with mud motor and LWD: Gamma, Resistivity, Porosity, D & I GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS 22 @ 1682 0 @ 0.4 TRIP GAS n/a CUTTING GAS @ @ WIPER GAS n/a CHROMATOGRAPHY(ppm) SURVEY 0 METHANE (C-1) 2722 @ 1259 @ CONNECTION GAS HIGH 0 ETHANE (C-2) 813 @ 1259 @ AVG PROPANE (C-3) 0 @ @ CURRENT BUTANE (C-4) 0 @ @ CURRENT BACKGROUND/AVG 0 PENTANE (C-5) 0 @ @ HYDROCARBON SHOWS None through drilled interval. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY Permafrost and beyond PRESENT LITHOLOGY ---------Claystone with very minor Sand and Siltstone---------- Drill ahead from 691' to 1040'. Flow line packs off with cuttings. Work pipe and clean flow line by varying pump rates, with pumps off at times to clear flow DAILY line. Drill ahead from 1040' to 1650' Rig looses power when generator motor #2 overheats. Drill ahead fro m 1650' to TD at 1881'. Circulate 3 bottoms up. ACTIVITY Pump carbide: Expected round trip of 3550 STKS; get back main gas early at 2600 STKS and second peak at 5800 STKS. Down I ink LWD and monitor SUMMARY hole for 10 minutes. Begin pulling out of hole for wiper trip. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4550, RW $1825 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS\... 3/6/2008 C~ J • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPOCH Mastodon 6-3-9 REPORT FOR Floyd Hurt, Abe Purugganan DATE Mar 06, 2008 DEPTH 1890' PRESENT OPERATION On the bank. TIME 2359 hrs YESTERDAY 1881' 24 HOUR FOOTAGE 9' CASING INFORMATION 16" @ 85' SURVEY DATA DEPTH INCLINATION AZIMUTH VERTICAL DEPTH BIT INFORMAl10N INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN1 12 1/4" HUGHES MX-L1X 5140070 3 X 16, 1 X 14 85' 1890 1805' 26.5 Csg PT. DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 63.6 @ 1881 15.2 @ 1885 27.9 17.3 FT/HR SURFACE TORQUE 11183 @ 1881 5040 @ 1889 8732.0 7504 AMPS WEIGHT ON BIT 19 @ 1881.00000 3 @ 1882.00000 4.4 0.00000 KLBS ROTARY RPM 122 @ 1882 92 @ 1885 126.3 112.0 RPM PUMP PRESSURE 2016 @ 1881 1810 @ 1882 2067.6 1847.00000 PSI DRILLING MUD REPORT DEPTH 1890' MW 9.4 VIS 48 PV 13 YP 16 FL 8.2 Gels 11/39/52 CL- 800 FC 2 SOL 8.1 SD 0.5 OIL MBL 22.5 pH 8.0 Ca+ 120 CCI MWD SUMMARY INTERVAL 85' TO 1890' TOOLS Tri-cone bit with mud motor and LWD: Gamma, Resistivity, Porosity, D & I GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS 0 @ @ TRIP GAS n/a CUTTING GAS @ @ WIPER GAS 0 CHROMATOGRAPHY (ppm) SURVEY 0 METHANE (C-1) 0 @ @ CONNECTION GAS HIGH 0 ETHANE (C-2) 0 @ @ AVG PROPANE (C-3) 0 @ @ CURRENT BUTANE (C-4) 0 @ @ CURRENT BACKGROUND/AVG 0 PENTANE (C-5) 0 @ @ HYDROCARBON SHOWS None through drilled interval. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY Permafrost and beyond PRESENT LITHOLOGY ----------Claystone to 1881` Sandstone 1881-1890'---------- Pull out of hole for wiper trip. Pull 20k over at 1614', 1594', 1560', 1514'. Pull out to top of HWDP. Run back in hole to 1881' DAILY with no problems. Ciculate 10 minutes; pack off flow line and flow box. Clean flow line and circulate slowly to clear packed off ACTIVITY material. Establish circulation and clean hole 4 times around. Drop carbide: Expected round trip 3550 STKS; get main gas back SUMMARY at 3800 STKS and second peak at 8750 STKS. Down link LWD. Drill ahead from 1881' to 1890' for extra rat hole. Circulate bottoms up; lay down 1 joint of drill pipe; blow down top drive. Pull out of hole from 1890' at 900 ft/hr with no problems. Lay down smart tools. Make ready to run 9 5/8" casing. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4550, RW $825 REPORT BY Larry Resch file://C:\DOCLJMENTS AND SETTINGS\ADMINISTRATOR\MYbOCUMENTS\MY WELLS\... 3/7/2008 • • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPOCH Mastodon 6-3-9 REPORT FOR Floyd Hurt, Abe Purugganan DATE Mar 07, 2008 DEPTH 1890' PRESENT OPERATION Cement Operations TIME 2359 hrs YESTERDAY 1890' 24 HOUR FOOTAGE 0' CASING INFORMATION 16" @ 85'_ _9 5/8" @ DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN1 12 1/4" HUGHES MX-L1X 5140070 3 X 16, 1 X 14 85' 1890' 1805' 26.5 Csg Pt DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT @ @ KLBS ROTARY RPM @ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 1890' MW 9.45 VIS 46 PV 11 YP 17 FL 8.4 Gels 11/38/54 CL- 720 FC 2 SOL 8.5 SD 0.5 OIL MBL 22.5 pH 8.0 Ca+ 120 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ @ TRIP GAS CUTTING GAS @ @ WIPER GAS CHROMATOGRAPHY(ppm) SURVEY METHANE (C-1) @ @ CONNECTION GAS HIGH ETHANE (C-2) @ @ AVG PROPANE (C-3) @ @ CURRENT BUTANE (C-4) @ @ CURRENT BACKGROUND/AVG PENTANE (C-5) @ @ HYDROCARBON SHOWS No new footage drilled this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new footage drilled this period. Make ready to run 9 5/8", 40# casing. Pull wear ring; make dummy run with hangar; rig up necessary tools. Run 9 5/8" 40 # DAILY casing to 1847'. Circulate and condition; blow down all lines. Lay down casing tools and rig up to run drill pipe. Run in hole to ACTIVITY 1789'; space out drill pipe amJ stab in. Rig up cement lines and test to 4000 psi. Pump 180 bbl lead at 10.7 ppg; 45 bbl tail at SUMMARY 15.9 ppg; displace with drill mud. Rig down cement lines, lay down landing joint, pull out of stab in, lay down cross overs. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4550, RW $825 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCiJMENTS\MY WELLS\... 3/8/2008 • • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EI'C~CH Mastodon 6-3-9 REPORT FOR Floyd Hurt, Abe Pu nagganan DATE Mar 08, 2008 DEPTH 1890' PRESE NT OPERATION Testing BOP's TIME 2359 hrs YESTERDAY 1890' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" @ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT @ @ KLBS ROTARY RPM @ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH No Report MW VIS PV YP FL Gels CL- FC SOL SD OIL MBL pH Ca+ CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ @ TRIP GAS n/a CUTTING GAS @ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) @ @ CONNECTION GAS HIGH n/a ETHANE (C-2) @ @ AVG PROPANE (C-3) @ @ CURRENT BUTANE (C-4) @ @ CURRENT BACKGROUND/AVG 0 PENTANE (C-5) @ @ HYDROCARBON SHOWS No new footage this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new hole drilled this period. DAILY ACTIVITY SUMMARY Completed cement operations. Remove diverter, nipple up and test BOP's. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $ 4550, RW $825 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS\... 3/9/2008 • • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT El'QCH Mastodon 6-3-9 REPORT FOR Abe Purugganan, Fl oyd Hurt DATE Mar 09, 2008 DEPTH 1890' PRESENT OPERATION Pick Up BHA TIME 2359 hrs YESTERDAY 1890' 24 HOUR FOOTAGE 0' CASING INFORMATION : 9 5/8" @ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED N62 81/2" DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT @ @ KLBS ROTARY RPM @ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 1890' MW 8.6 VIS 47 PV 8 YP 14 FL 10.4 Gels 4/6/7 CL- 24k FC 1 SOL 0.0 SD -- OIL MBL -- pH 8.2 Ca+ 160 CCI MWD SUMMARY INTERVAL TO TOOLS Tools and BHA not confirmed at report time. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ @ TRIP GAS CUTTING GAS @ @ WIPER GAS CHROMATOGRAPHY(ppm) SURVEY METHANE (C-1) @ @ CONNECTION GAS HIGH ETHANE (C-2) @ @ AVG PROPANE (C-3) @ @ CURRENT BUTANE (C-4) @ @ CURRENT BACKGROUND/AVG PENTANE (C-5) @ @ HYDROCARBON SHOWS No new footage drilled this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new footage drilled this period. Completion of BOP tests: Koomy, blinds, lower rams, dart valve. Blow down lines. Pressure test 9 5/8" casing/shoe at 2000 psi DAILY for 30 minutes. Epoch records and charts all tests. Pick up 55 joints of drill pipe; tag cement at 1740'. Shut down and clean up ACTIVITY cuttings tank area an d cellar. Cut/slip drill line and service top drive. Change out mud system: 115 bbls. Trip out of hole. Pick SUMMARY up BHA and trip in hole with 5 stands HWDP. Attempt to cycle tool and find malfunction with radiation source/tool. Trip out of hole at 6 minutes per stand while checking for radiation. EPOCH PERSONNEL ON BOARD :Resch, Bleys + 2 SC_ DAILY COST : DML $4550, RW $825 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTiNGS\ADMINISTRATOR\MY DOCUMENTS\MY WELL... 3/10/2008 • • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT ~1 O V~ Mastodon 6-3-9 REPORT FOR Floyd Hurt, Abe Pumgganan DATE Mar 10, 2008 DEPTH 2412' PRESENT OPERATION Drilling Ahead TIME 2359 hrs YESTERDAY 1890' 24 HOUR FOOTAGE 522' CASING INFORMATION 9 5/8" ~ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH 1937.19' 0.74 192.55 1937.1' 2066.29' 0.78 184.55 2066.19' SURVEY DATA 2195.50' 0.59 203.82 2195.39' 2324.32' 0.63 187.60 2324.20' 2452.62' 0.52 196.74 2452.50' BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED NB 2 8 1/2" HYCOLOG DS619S-A3 206365 4 x 12 1890' 522' 4.7 DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 228.0 ~ 2185 9.4 @ 1891 143.3 127.9 FT/HR SURFACE TORQUE 12900 @ 1960 1999 @ 2159 5708.7 3997 AMPS WEIGHT ON BIT 14 @ 2232 i @ 2014 8.1 6.9 KLBS ROTARY RPM 122 @ 1921 31 ~ 2279 62.6 34 RPM PUMP PRESSURE 1847 @ 1890 920 ~ 1918 1234.7 1371 PSI DRILLING MUD REPORT DEPTH 2125' MW 8.85 VIS 40 PV 8 YP 14 FL 6.5 Gels 4/6/7 CL- 31k FC 1 SOL 1.4 SD -- OIL MBL -- pH 9.4 Ca+ 120 CCI MWD SUMMARY INTERVAL 1890' TO Current TOOLS PDC bit with mud motor and LWD: Gamma, Density, Porosity, Resistivity, D & 1. GAS SUMMARY (untts) HIGH LOW AVERAGE DITCH GAS 0 @ ~ TRIP GAS 0 CUTTING GAS ~ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY 0 METHANE (C-1) 0 @ ~ CONNECTION GAS HIGH 0 ETHANE (C-2) 0 @ @ AVG PROPANE (C-3) 0 @ @ CURRENT BUTANE (C-4) 0 @ @ CURRENT BACKGROUND/AVG 0 PENTANE (C-5) 0 ~ HYDROCARBON SHOWS Occasional trace (< 1 Unit). INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY -------Claystone, Sittstone, Occasiona l Sand-------- Continue building BHA: Load nuclear sources, pick up collars and jars. Run in hole to 983' and shear out cold mud. Pick up drill pipe lrom 983'to 1720'. Shear out old mud and wash down to 1786'. Drill out DAILY ACTIVITY moat collar at 1786', cement, and drill new hale to 1915'. Short trip from 1915'to 1816'. Blow down top drive. Run FIT and LOT: No leak off at EMW = 15.6 PPG. Epoch records and charts LOT. Run in hole SUMMARY to 1915' and drill ahead. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4550, RW $825 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELL... 3/11/2008 Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT J1 O V~ 1 Mastotlon 6-3-9 . REPORT FOR Don Fowler, Abe Pemgganan DATE Mar 11, 2008 DEPTH 3878' PRESENT OPERATION POOH: Wiper Trip TIME 2359 hrs YESTERDAY 2412' 24 HOUR FOOTAGE 1466' CASING INFORMATION 9 5/8" ~ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH 2580.84 0.80 194.28 2580.71' 2838.98' 0.82 185.24 2838.82' SURVEY DATA 3094.98' 0.75 189.53 3094.79' 3352.48' 0.66 216.02 3352.27' 3610.48' 0.66 200.35 3610.25' BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE SM JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN 2 8 1/2" HYCALOG DS619S-A3 206365 4 X 12 1890' 1969' 14.4 DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 222.9 ~ 3760 12.9 @ 3046 151.3 174.8 FT/HR SURFACE TORQUE 12900 ~ 2439 760 @ 3047 3949.9 3875 AMPS WEIGHT ON BIT 15 @ 3535. 1 ~ 2766 8.1 0.00000 KLBS ROTARY RPM 63 @ 2463 30 ~ 2697 36.3 37 RPM PUMP PRESSURE 1750 ~ 3647 1050 @ 2463 1510.1 1668 PSI DRILLING MUD REPORT DEPTH 3854' MW 8.9 VIS 44 PV 10 YP 17 FL 5.0 Gels 5/7/8 CL- 30k FC i SOL 1.8 SD 0.1 OIL MBL 3.8 pH 9.2 Ca+ 200 CCI MWD SUMMARY INTERVAL 1890' TO Current TOOLS PDC bit with mutl motor and LVvD: Gamma, Dentltty, Porosity, Resistivity, D 8 I GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS 140 ~ 2722 0 ~ 10.7 TRIP GAS n/a CUTTING GAS ~ ~ WIPER GAS 0 CHROMATOGRAPHY (ppm) SURVEY 0 METHANE (C-1) 13658 ~ 3878 0 @ CONNECTION GAS HIGH 0 ETHANE (C-2) 30844 ~ 3878 0 @ AVG OPANE (C-3) 0 @ ~ CURRENT ANE (C-4) 0 @ @ CURRENT BACKGROUND/AVG 10-20 U PENTANE (C-5) 0 ~ ~ HYDROCARBON SHOWS Several low gas readings and occasional oil staining. Please 2fere to mud log for details. INTERVAL LITHOLOGV/REMARKS GAS DESCRIPTION LITHOLOGV PRESENT LITHOLOGY --------Sittstone, Sandstone, occasional Carbonaceous Shale--------- Drill ahead from 2412' to 3043'. Circulate two bottoms up antl pump high vis sweep. Hole cleanetl up well. Short trip from 3043' to 1820'. Pulled 18k over at 2970', 2900', 2563'; 10k over at 2109'. Contluct BOP drill; shut well in DAILY al 1:30 minutes. Service top dri ve. Run in hole from 1820' l0 3043'. Circulate bottoms up and resume drilling from 3043' 103493' Co ntrolled drilling per Geologist from 3493'to 3879'. Circulate 2 bottoms up. Pull out of hale from ACTIVITY 3879' checking tool joint torque . Epoch tests gas detection equipment at 0055 hrs (2469'); dropped carbitle during connection at 0355 (2655') with 147 Untt reading {typical}; observed very low but steady background gas traces SUMMARY from 0400 (2770') antl coninue to carry low background gas through reminder of today's drilled interval. No connection gasses reco rded prior to report time. I EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC DAILY COST : DML $4550, RW $825 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS\MAST... 3/12/2008 Daily Report Page 1 of 1 Chevron USA Vvhke Hills Project DAILY WELLSITE REPORT 1 J1 O V~ Mastodon 6-3-9 . REPORT FOR Don Fowler, Abe Purogganan DATE Mar 12, 2008 DEPTH 4845' PRESENT OPERATION TD: Wiper Tdp TIME 2359 hrs YESTERDAY 3878' 24 HOUR FOOTAGE 967' CASING INFORMATION 9 5/8" @ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH 3867.67' 0.74 200.86 3867.42' 4124.77' 0.79 216.34 4124.50' SURVEY DATA 4382.77' 0.66 230.15 4382.49' 4512.29' 0.77 235.74 4572.00' 4770.19' 2.25 237.06 4769.81' BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE SM JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN 2 8 1/2" HYCALOG DS619S-A3 206365 4 X 12 1890' 2955' 22.1 DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 197.9 ~ 4199 25.7 @ 4503 138.4 155 FTMR SURFACE TORQUE 9944 ~ 4678 37 @ 4696 3234.1 2440 AMPS WEIGHT ON BIT i6 ~ 4317 2 ~ 3880 9.0 9.4 KLBS ROTARY RPM 66 @ 4781 14 @ 4492 52.1 65 RPM PUMP PRESSURE 2198 ~ 4741 1486 @ 3880 1834.6 2054 PSI DRILLING MUD REPORT DEPTH 4777' MW 9.7 VIS 47 PV 14 YP 19 FL 4.6 Gels 5!17/74 CL- 29k FC 1 SOL 3.4 SD 0.3 OIL MBL 5.0 pH 8.7 Ca+ 180 CCI MWD SUMMARY INTERVAL 1890'. TO 4845' TOOLS PDC bit welh mud motor and LWD: Gamma, Densely, Porosity, Resistivity, D & I. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS 67 @ 4412 0 ~ 4391 19.2 TRIP GAS N/A CUTTING GAS @ ~ WIPER GAS 20 U CHROMATOGRAPHY (ppm) SURVEY 0 METHANE (C-7) 76280 (a~ 4412 166 @ 4280. 3803.3 CONNECTION GAS HIGH 6 ETHANE (C-2) 142 ~ 4828 0 ~ 20.3 AVG 0 OPANE (C-3) 0 ~ @ CURRENT 0 ANE (C-4) 0 ~ ~ CURRENT BACKGROUND/AVG 5 PENTANE (C-5) 0 HYDROCARBON SHOWS Several zones betw een 50 and 69 Units were seen. Please refer to Show Reports on MyWells in a ddition to mud log. INTERVAL LITHOLOGV/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY --------Carbonaceous Shale, minor Sielstone--------- DAILY ACTIVITY Continue wiper trip from 3429' to 1820' checking tool torque. Remove and replace encoder. Continue to pull out of hole to 215' checking torque on tool joints. Run in hole from 215' to 3659'. Tag 20' of fll. Wash and SUMMARY ream from 3859'to 3879'. Drill ahead from 3879'to 4845'. Circulate bottoms up; circ ulate and cendelion hole. lI EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4350, RW $825 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS\MAST... 3/13/2008 Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPO ~H Mastodon 6-3-9 REPORT FOR Don Fowler, Abe Pumgganan DATE Mar 12, 2008 DEPTH 4845' PRESENT OPERATION TD: Wiper Tdp TIME 2359 hrs YESTERDAY 3878' 24 HOUR FOOTAGE 967' CASING INFORMATION 9 5/8" @ 1847' DEPTH - INCLINATION AZIMUTH VERTICAL DEPTH 3867.67' 0.74 200.86 3867.42' 4124.77' 0.79 216.34 4124.50' SURVEY DATA 4382.77' 0.66 230.15 4382.49' 4512.29' 0.77 235.74 4512.00' 4770.19' 2.25 237.06 4769.81' BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE SM JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN 2 8 i/2" HYCALOG OS619S-A3 206365 4 X 12 1890' 2955' 22.1 DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION 197.9 @ 4199 25.7 @ 4503 138.4 155 FT/HR SURFACE TORQUE 9944 @ 4678 37 @ 4696 3234.1 2440 AMPS WEIGHT ON BIT 16 ~ 4311 2 @ 3880 9.0 9.4 KLBS ROTARY RPM 68 @ 4781 14 @ 4492 52.1 65 RPM PUMP PRESSURE 2198 @ 4741 1486 @ 3880 1834.6 2054 PSI DRILLING MUD REPORT DEPTH 4717' MW 9.1 VIS 47 PV 14 YP 19 FL 4.6 Gels 5/11/14 CL- 29k FC 1 SOL 3.4 SD 0.3 OIL MBL 5.0 pH 8.7 Ca+ 180 CCI MWD SUMMARY INTERVAL 1890' TO 4845' TOOLS PDC bit with mud motor and LVVD: Gamma, Density, Porosity, Resistivky, D & I. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS 67 @ 4412 0 @ 4391 19.2 TRIP GAS N/A CUTTING GAS @ ~ WIPER GAS 20 U CHROMATOGRAPHY (ppm) SURVEY 0 METHANE (C-1) 16280 @ 4412 166 @ 4280. 3803.3 CONNECTION GAS HIGH 19 U ETHANE (C-2) 142 @ 4828 0 @ 20.3 AVG 0 ROPANE (C-3) 0 @ @ CURRENT 0 TANE (C-4) 0 (~ ~ CURRENT BACKGROUND/AVG 5 PENTANE (C-5) 0 HYDROCARBON SHOWS Several zones between 50 and 69 Units were seen. Please refer to Show Reports on My Wells in a dtlition to mud log. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY --------Carbonaceous Shale, minor Sittstone--------- DAILY ACTIVITY Continue wiper trip from 3429' to 1820' checking tool torque. Remove and replace encoder. Continue to pull out of hole to 215' checking torque on tool joints. Run in hole from 215' to 3859'. Tag 20' of fill. Wash antl SUMMARY ream from 3859' to 3879'. Dnllahead fmm 3679' to 4845'. Circulate bottoms up; circulate antl condition hole. EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4350, RW $825 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS\MAST... 3/13/2008 • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPOCH Mastodon 6-3-9 REPORT FOR Don Fowler, Abe Pumgganan DATE Mar 13, 2008 DEPTH 4845' PRESENT OPERATION Wre Line Logging TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" ~ 1647' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED BN 2 8 1/2" HYCALOG DS619S-A3 206365. 4 X 12 1890' 4845' 2955' 22.1 TD DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION ~ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT ~ @ KLBS ROTARY RPM ~ @ RPM PUMP PRESSURE @ ~ PSI DRILLING MUD REPORT DEPTH MW VIS PV YP FL Gels CL- FC SOL SD OIL MBL pH Ca+ CCI MVVD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ @ TRIP GAS n/a CUTTING GAS @ @ WIPER GAS 16 U, 3.5 hrs CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) ~ @ CONNECTION GAS HIGH n/a ETHANE (C-2) @ @ AVG PROPANE (C-3) ~ ~ CURRENT BUTANE (C-4) ~ @ CURRENT BACKGROUND/AVG 5 U PENTANE (C-5) @ ~ HYDROCARBON SHOWS No new footage tlrilletl this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGV No new footage drilletl this pedod. Short trip from 4845'to 3366'; wash out from 4523' to 4459'. Run back in hole and wash and ream from 4781'to 4845'. Epoch records 18 units of down time gas from wiper trip. Drop carbide and confirm hole DAILY ACTIVITY is in gage. Pump high vis sweep. Downloatl LWD an d start out of the hole. Lay down smart tools per Schlumberger. Rig up Baker and mn Sonic MREX Caliper. Change mud pump liners to 6". Continue SUMMARY general house keeping antl plan ahead for rig move . EPOCH PERSONNEL ON BOARD Resch, Bleys + 2 SC_ DAILY COST : DML $4350_RW $825 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/14/2008 CJ • Daily Report Page I of I Chevron USA WOhite Hills Project DAILY WELLSITE REPORT ~T O ~T T ~Jl H Mastodon 6-3-9 REPORT FOR Don fowler, Abe Puru gganan DATE Mar 14, 2008 DEPTH 4845' PRESENT OPERATION VMre Line Logging TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 95/8"~184T DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ @ FT/HR SURFACE TOROUE @ ~ AMPS WEIGHT ON BIT ~ @ KLBS ROTARY RPM ~ @ RPM PUMP PRESSURE ~ @ PSI DRILLING MUD REPORT DEPTH 4845' MW 9.15 VIS 53 PV 18 YP 21 FL 4.4 Gels 6/8/10 CL- 28k FC 1 SOL 3.2 SD 0.5 OIL MBL 5.0 pH 8.7 Ca+ 240 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS ~ @ TRIP GAS n/a CUTTING GAS ~ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) ~ @ CONNECTION GAS HIGH n/a ETHANE (C-2) ~ ~ AVG PROPANE (C-3) @ @ CURRENT BUTANE (C-4) @ ~ CURRENT BACKGROUND/AVG n/a PENTANE (C-8) HYDROCARBON SHOWS No new footagge drilled this periotl. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new (cotage tlrilled this pedotl. DAILY ACTIVITY Continue running S onic MREX Caliper Icg. Pick up rotary core lagging tool antl run in hale. Rotary core logging from 2160' to 2440'. Remove cares and change out mandril. Recover 32 cores. SUMMARY Continue rotary coring from 2440'to 3670'. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST : DML $3550, RW $825 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/15/2008 C~, • Daily Report Page 1 of 1 Chevron USA Whtte Hills Project DAILY WELLSITE REPORT EPO CH Mastotlon 6-3-9 REPORT FOR Don Fowler, Abe Pumgganan DATE Mar 15, 2008 DEPTH 4845' PRESENT OPERATION Prep to RIH/Logging TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" ~ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION ~ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT @ @ KLBS ROTARY RPM ~ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 4845' MW 902 VIS 44 PV 13 YP 16 FL 4.6 Gels 4/7/10 CL- 29.Sk FC 1 SOL 3.5 SD 0.4 OIL MBL 5.0 pH 8.7 Ca+ 240 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY funks) HIGH LOW AVERAGE DITCH GAS ~ @ TRIP GAS n/a CUTTING GAS ~ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) ~ @ CONNECTION GAS HIGH n/a ETHANE (C-2) @ ~ AVG PROPANE (C-3) @ ~ CURRENT BUTANE (C-4) ~ @ CURRENT BACKGROUND/AVG -- PENTANE (C-5) ~ @ HYDROCARBON SHOWS No new (Dotage drilletl this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGV No new footage drilled this period. DAILY ACTIVITY Continue running Baker rotary core tool fmm 3670' to 3000'. Pull out of hole with Baker tool from 3000'; lay tlown sa me. Pickup Backer RCI tool. log hole fmm 4510'. Test BOP's. Lay down logging tools SUMMARY after mn. Complete testing BOP's. Epoch record s and charts test results. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST : DML $4550, RW $750 REPORT BY Larry.resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/16/2008 ;] Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPa~H Mastodon 6-3-9 REPORT FOR Don Fowler, Abe Pumgganan DATE Mar 16, 2008 DEPTH 4845' PRESENT OPERATION Logging Hale TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" ~ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION ~ ~ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT @ @ KLBS ROTARY RPM @ ~ RPM PUMP PRESSURE ~ @ PSI DRILLING MUD REPORT DEPTH 4845' MW 9.15 VIS 47 PV 14 YP 18 FL 4.8 Gels 5/7/9 CL- 29k FC i SOL 3.5 SD 0.4 OIL MBL 5.0 pH 8.7 Ca+ 240 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ @ TRIP GAS n/a CUTTING GAS ~ @ W1PER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) ~ ~ CONNECTION GAS HIGH n/a ETHANE (C-2) @ @ AVG PROPANE (C-3) ~ @ CURRENT BUTANE (C-4) ~ @ CURRENT BACKGROUND/AVG 0 PENTANE (C-5) @ ~ HYDROCARBON SHOWS No new footage tlrilletl this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGV PRESENT LITHOLOGY No new footage drilled this period. Complete BOP testing; lay down test tool. Service rg top tlrive; work on frozen Kelly hose. Pick up drill tools and conveyed formation tool; run in hole to 1826'. Circulate and condition; rig up wireline sheave in DAILY ACTIVITY derrick. Continue running in hole from 1826'to 2631'. Rig upside entry sub. Run in hole wkh wireline to latch in; latch tool and verity. Clamp wireline to side entry sub antl rig up additional wireline sheaves. SUMMARY Move tc 2713' and continue logging. EPOCH PERSONNEL ON BOARD resch, Bleys_ DAILY COST : DML $3550, RW $750 REPORT BY Larry Rescch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/17/2008 • • Daily Report Page I of I Chevron USA White Hills Project DAILY WELLSITE REPORT El's ~~ Mastodon 6-3-9 REPORT FOR Don Fowler, Abe Pumgganan DATE Mar 17, 2008 DEPTH 4845' PRESENT OPERATION Prep for VSP Log TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" ~ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ ~ FT/HR SURFACE TORQUE @ ~ AMPS WEIGHT ON BIT ~ @ KLBS ROTARY RPM ~ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 4645' MW 9.15 VIS 48 PV 13 YP 20 FL 5.0 Gels 5/7/9 CL- 28.Sk FC i SOL 3.5 SD 0.4 OIL MBL 5.0 pH 8.7 Ca+ 240 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS ~ ~ TRIP GAS CUTTING GAS ~ ~ WIPER GAS CHROMATOGRAPHY (ppm) SURVEY METHANE (C-1) ~ @ CONNECTION GAS HIGH ETHANE (C-2) ~ ~ AVG PROPANE (C-3) @ @ CURRENT BUTANE (C-4) @ ~ CURRENT BACKGROUND/AVG PENTANE (C-5) HYDROCARBON SHOWS No new footage drilled this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGV PRESENT LITHOLOGY No new footage drilled this period. Continue logging wdh tlrill pipe conveyed tool at 2726'. Rel ax straddle packer; monitor well. Run in hole from 2728' to 3043'; run log. Run in hole firm 3043' to 3440': mn log. Complete log, work packer Nee, DAILY ACTIVITY break circulation and circulate bottoms up. Move tool down hole from 3440' to 3523'. Pull out of hole from 3523'to sitle entry sub at 2631'. Lay down third party tool and rig down side entry sub. Continue out of SUMMARY hole fmm 2631' to shoe. Blow tlown top d rive; check well for flow. Continue out of hole from shoe to BHA. Lay down logging tools. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST : DML $3550, RW $750 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/18/2008 r Daily Report Page 1 of 1 Chevron USA While Hills Project DAILY WELLSITE REPORT ~^ O R' T ~J) ^\/t J1rH Mastodon 6-3-9 , REPORT FOR Don Fowler, Jason Bradford DATE Mar 18, 2008 DEPTH 4645' PRESEN T OPERATION POOH From Wiper Tdp TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" @ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE SM JETS IN OUT FOOTAGE HOURS T/B/C PULLED RR BN 2 8 1/2" HVCOLOG DS6195-A3 206365 4 X 12 1890 2955' 30.02 DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ ~ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT ~ @ KLBS ROTARY RPM ~ ~ RPM PUMP PRESSURE @ ~ PSI DRILLING MUD REPORT DEPTH 4845' MW 9.25 VIS 51 PV 17 - YP 20 FL 5.2 Gels 5/8/10 CL- 29.5k FC 1 SOL 3.9 SD 0.4 OIL MBL 5.0 pH 6.7 Ca+ 260 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole this pedad. GAS SUMMARY funks) HIGH LOW AVERAGE DITCH GAS ~ @ TRIP GAS 33 U CUTTING GAS ~ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) @ @ CONNECTION GAS HIGH n/a ETHANE (C-2) ~ ~ AVG PROPANE (C-3) @ ~ CURRENT BUTANE (C-4) ~ ~ CURRENT BACKGROUND/AVG - PENTANE (C-5) ~ HYDROCARBON SHOWS No new footage tldlletl this period. INTERVAL LITHOLOGV/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new footage drilled this period. Service rig while on the bank. Run in hole to 1837'; brea k circulation. Continue to trip in hole from 1837' to 3446'; break circulation. Cont inue trip in hole from 3466' to 4154'. Wash antl ream from 4154' to DAILY ACTIVITY 4669'. Ream tight spots f rom 4669'to bottom. Circulate 2 bottoms up and record 33 units of trip/down time gas. Pump 13 bbl slug at 1.5 ppg over. Pull oul of hole and work pipe through tight spots. Pull out of SUMMARY hole fmm 4283' to 1322'. Check for flow at shoe; blow down top tldve. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST : DML $3550, RW $750 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/19/2008 • C7 Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPOCH Mastotlon 6-3-9 REPORT FOR Don Fowler, Jason Bradford DATE Mar 19, 2008 DEPTH 4845' PRESENT OPERATION Open Hole Logging TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/6" @ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ ~ FT/HR SURFACE TORQUE ~ @ AMPS WEIGHT ON BIT ~ @ KLBS ROTARY RPM ~ ~ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 4845' MW 9.35 VIS 51 PV 17 YP 20 FL 5.6 Gels 6/8/10 CL- 29.5k FC 1 SOL 4.7 SD 0.4 OIL MBL 5.0 pH 8.8 Ca+ 220 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ ~ TRIP GAS 3 Uni[s CUTTING GAS @ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEV n/a METHANE (C-1) @ ~ CONNECTION GAS HIGH n/a ETHANE (C-2) @ @ AVG PROPANE (C-3) ~ ~ CURRENT BUTANE (C-4) @ @ CURRENT BACKGROUND/AVG < 1 Unit PENTANE (C-5) HYDROCARBON SHOWS No new footage tlrilletl. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new footage drilled. Continue pulling out of hole from 1322'. Lay down bit and BHA. Pickup Baker sample lagging tool and mn in hole to 788'. Service rig due to extrem a cold (> -SOF). Replace 2 hydraulic hoses; thaw lu be oil. DAILY ACTIVITY Continue trip in hole from 788'to 1817'. Ci rculate and condition. Resume trip in hole from 1817' l0 3684'. Pick up third party tools: Rig upside entry sub and pump latch head tlown; function tools. Continue to SUMMARY mn in hole from 3684'tc 4462'. Continue open hale logging. Pull out of hale from 4462'to 3680' and continue open hole logging. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST : DML $3550, RW $750 REPORT BY Larry Resch w file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUIVIENTS\MY WELLS... 3/20/2008 • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EI'O CH Mastotlon 6-3-9 REPORT FOR Don Fowler, Jason Bradford DATE Mar 20, 2008 DEPTH 4846' PRESENT OPERATION Prep (or VSP Log TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 6/8" ~ 1847' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION ~ @ FT/HR SURFACE TORQUE ~ ~ AMPS WEIGHT ON BIT ~ ~ KLBS ROTARY RPM ~ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 4845' MW 9.25 VIS 49 PV 14 YP 18 FL 6.0 Gels 5!7/9 CL- 27k FC 1 SOL 4.3 SD 0.5 OIL MBL 5.0 pH 8.7 Ca+ 200 CCI MWD SUMMARY INTERVAL TO TOOLS No tools in hole. GAS SUMMARY (untts) HIGH LOW AVERAGE DITCH GAS ~ ~ TRIP GAS n/a CUTTING GAS ~ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) @ @ CONNECTION GAS HIGH n/a ETHANE (C-2) @ ~ AVG PROPANE (C-3) ~ @ CURRENT BUTANE (C-4) ~ ~ CURRENT BACKGROUND/AVG 0-3 Units PENTANE (C-5) HYDROCARBON SHOWS No new footage tlrilletl this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new footage drilled this period. Continue open hole logging at 3860'. Move tool up hole from 3860' to 3704'; continue logging. Complete logged interval antl lay daw n side entry sub.Trip out of hole from 3704' to 1817'. Rig up side entry sub; DAILY ACTIVITY check latch and function tool. Run back in hole from 1 817' to 2380'; log interval. Pull out of hole from 2380' to 1817'. Remove side en try sub and riq tlown wire line sheave. Continue out of hole; lay down SUMMARY tools. Run in hole with seismic tool on w ire line. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST DML $3550, RW $750 REPORT BY Larry Resch C file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\1VIY WELLS... 3/21/2008 • • Daily Report Page 1 of 1 Chevron USA White Hills Project DAILY WELLSITE REPORT EPOCH Mastotlon 6-3-9 REPORT FOR Don Fowler, Jason Bradford DATE Mar 21, 2008 DEPTH 4845' PRESENT OPERATION Run 3 1/2" Liner TIME 2359 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" ~ 1847' 3 1/2" 9.20# ~-- DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE NOURS T/B/C PULLED DRILLING PARAMETERS .HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION ~ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT ~ @ KLBS ROTARY RPM ~ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH 4845' MW 9.25 VIS 52 PV 15 YP 20 FL 5.2 Gels 5/7/9 CL- 27k FC 1 SOL 4.3 SD 0.5 OIL MBL 5.0 pH 8.7 Ca+ 320 CCI MWD SUMMARY INTERVAL TO TOOLS , No tools in hole this pedotl. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ ~ TRIP GAS n/a CUTTING GAS ~ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) @ @ CONNECTION GAS HIGH n/a ETHANE (C-2) @ @ AVG PROPANE (C-3) (rD, @ CURRENT BUTANE (C-4) @ @ CURRENT BACKGROUND/AVG -- PENTANE (C-5) @ @ HYDROCARBON SHOWS No new footage drilled this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGV No new footage drilletl this period. DAILY ACTIVITY Log out of hole wfth seismic tool. Lay tlown tool and prepare to mn 3 1/2" 9.20# liner. Run same to 1645'. Circulate antl condition mud. Continue running liner from 1845' to 3223'. Change out power tongs SUMMARY and elevators. Make up hanger. Run in hole with 4 stantls HWDP from 3223'to 3471'. Circulate liner volume. Run liner from 3471' to 3781'. EPOCH PERSONNEL ON BOARD Resch, Bleys_ DAILY COST DML $4150, RW $750 REPORT BY Larry Resch • file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/22/2008 Daily Report Page 1 of 2 Chevron USA White Hills Project DAILY WELLSITE REPORT ~~~~ Mastodon 6-3-9 REPORT FOR Don Fowler, Jason Bradford DATE Mar 22, 2008 DEPTH 4845' PRESENT OPERATION Pressure Test Casing TIME 2200 hrs YESTERDAY 4845' 24 HOUR FOOTAGE 0' CASING INFORMATION 9 5/8" to 1847'_ _3 1/2" @ 4845' DEPTH INCLINATION AZIMUTH VERTICAL DEPTH SURVEY DATA BIT INFORMATION INTERVAL CONDITION REASON NO. SIZE TYPE S/N JETS IN OUT FOOTAGE HOURS T/B/C PULLED DRILLING PARAMETERS HIGH LOW AVERAGE CURRENT AVG RATE OF PENETRATION @ @ FT/HR SURFACE TORQUE @ @ AMPS WEIGHT ON BIT @ @ KLBS ROTARY RPM @ @ RPM PUMP PRESSURE @ @ PSI DRILLING MUD REPORT DEPTH MW VIS PV YP FL Gels CL- FC SOL SD OIL MBL pH Ca+ CCI MWD SUMMARY INTERVAL TO TOOLS No new footage drilled this period. GAS SUMMARY (units) HIGH LOW AVERAGE DITCH GAS @ @ TRIP GAS 13 U max CUTTING GAS @ @ WIPER GAS n/a CHROMATOGRAPHY (ppm) SURVEY n/a METHANE (C-1) @ @ CONNECTION GAS HIGH n/a ETHANE (C-2) @ @ AVG PROPANE (C-3) @ @ CURRENT BUTANE (C-4) @ @ CURRENT BACKGROUND/AVG -- PENTANE (C-5) @ @ HYDROCARBON SHOWS No new footage drilled this period. INTERVAL LITHOLOGY/REMARKS GAS DESCRIPTION LITHOLOGY PRESENT LITHOLOGY No new footage drilled this period. Continue running 3 1/2" casing from 3781 ft. to 4780 ft. Wash to bottom and tag bottom at 4845 ft. Add 5 ft. pup for space out. DAILY Circulate and condition while rigging up cement head and testing lines. Record a 13 Units of gas maximum while circulating. Pump 5 ACTIVITY bbls water followed by 224 bbls of 11.2 PPG cement. Drop dart. Bump plug with 1500 psi and increase to 3600 psi. Bleed off; check SUMMARY floats; 226 bbls displaced. Lay down third party cement head and tools. Pull out of hole sideways laying down drill pipe and HWDP. Pressure test casing to 2000 psi. Epoch records and charts test. Epoch logging unit ML014 released at 2200 hours. EPOCH PERSONNEL ON BOARD Resch, Bleys DAILY COST DML $3550, RW $750 REPORT BY Larry Resch file://C:\DOCUMENTS AND SETTINGS\ADMINISTRATOR\MY DOCUMENTS\MY WELLS... 3/22/2008 ~`~' ~~ ~ MNI Laboratories, Inc. RUN 1 Rotary Sidewall Core Photography for Chevron North America Exploration and Production UNOCAL Mastodon 6-3-9 Well North Slope Borough, Alaska Omni File No. HH-39032 Chevron North America Exploration & Production HH-39032 t` x ~ N I UNOCAL Mastodon b-3-9 Well v ' ~ ~. North Slo Borou h Alaska pe 9 Sampie No.: 1-i R Depth: 2 i 59.98 feet Visible Light ~~ A_O ss Y.e ;,. .~ ~~ ,,gam c i~ ~ ,~':v Longitudinal ~~ A..1 ALS L'/ Ultraviolet Light Chevron North America Exploration & Production ~~-3903 35~ ~ ~ I UNOCAL Mastodon b-3-91Ne11 ~~ ~'~. North Slope Borough, Alaska Sample Na : 1-2R Depth: 2i $9,97 fleet visible Ught ~~ ..» es z.~ ~I~ Longitudinal ~~ t® Q.3 2.b Ultraviolet Ught Chevron North America Exploration & Production ~~-39032 ~' t{~ , ~_ ~ ~ ( UNOCAL Mlastodon b-3-9 Vl/ell Wis. ~. North Slope Borough, Alaska Sample iVo.: 1=3i~ Depth; 2274,98 #eet vsihle Light Longitudinal ~~ i1 J0 ~t6 2r Ultraviolet Light Chevron North America Exploration & Production ~~-39032 M N ~ UNOCAL Mastodon 6-3-9 Well =- '~°~°°~~'~~ North Slope Borough, Alaska Sample No.: 1-4R Depth: 2295.04 feet Visible Light ~~ ~~ ..s s~ TAM. ~:. _ n,s ~~ ~~ n ~,•~ :~ ~_~~ Longitudinal ~~ ~.i i.6 2.0 Ultraviolet Light Chevron North America Exploration & Production HH-39032 - ~ ~ ~ UNOCAL Mastodon 6-3-9 Well ~~'~. North Slope Borough, Alaska SaNnple No, ~ 1-5R depth: 231 x,97 feet Visible Light ~z 9..M 0.5 .210 Longitudinal ~~ ~~ ~.~ ~.~ t .. t '~{ B. ~, t i.n' ~."~~"" t .~ts"1~o- °' ~~ .? ~~ ~ Ultraviolet tight Chevron North America Exploration & Production HH-39032 ~1ry ~ N 1 UNOCAL Mastodon 6-3-9 Well =- ~~'^~ North Slope Borough, Alaska Sample No.: 1-bR Depth: 2379.99 feet Visible Light ~~ ,~ a.s 2!B Longitudinal xx ~~ m.a ~.5 ~~ Ultraviolet Light Chevron North America Exploration & Production HH-39032 M N ~ UNOCAL Mastodon 6-3-9 Well ~~ ea! '~'°'~`°""~'"~~ North Slope Borough, Alaska Sannple IVo.: 1-7R Depth: 2389.97 feet Visible Light ~~ ,.o ~.~ z.e ~(~~ ~~° i4x,..ar k° ,. ~ ~' Longitudinal ~.. ~~ ~.~ Ultraviolet Light AA AA Chevron North America Exploration & Production HH-39032 IV1~~ Visible Light UNOCAL Mastodon b-3-9 Well .~ , ' ~'^~ North Slope Borough, Alaska Sample No.: 1-8~ Depth: 2410,07 feet ~~ ~.o ~ ~.~ Longitudinal am 3ra f.7 YA Ultraviolet Light Chevron North America Exploration & Production ~~_39p32 '~ ~ ~ , M N ~ UNOCAL Mastodon 6-3-9 Well ~~, mac. North Slope Borough, Alaska Sample No.. 1-9R Depth; 2414.99 feet Visible Light ~~ ~_~ •.5 P.6 Longitudinal ~~ ~.» ~.~ Ultraviolet Light Chevron North America Exploration & Production H1~-39032 N' UNOCAL Mastodon 6-3-9 Well ~° "~~ North Slope Borough, Alaska SampNe No.; 1-1 OR Depth: 2424.99 feet visible Light ~~ A 1D •~5 X.O Longitudinal ~~ ~.» gas sa Ultraviolet Light Chevron North America Exploration & Production ~Hl~_39032 M ~ I UNOCAL Mastodon 6-3-9 Well ~ ~. - °~°~'°°"`~,'~. North Slope Borough, Alaska Sample No.: 1-11 ~ Depth: 2433.08 feet Visible Light ~~ ,~ a~ ?A y - - 7 .. V ~ ~~~ ~ v ~ ,. ~~~ Y~~ '~<' Longitudinal ~~ ~~ ~~ ~.~ YA Ultraviolet Light Chevron North America Exploration & Production ~~-39032 I UNOCAL Mastodon 6-3-9 Well t . ~. North Slope Borough, Alaska Sample (Vo,: 1-12~R Depth: 2439.98 feet Visible Light ~, ,.e ~~ Y.9 Longitudinal am M A..R i8.6 2i Ultraviolet Light Chevron North America Exploration & Production HH-39032 M ~ I UNOCAL Mastodon b-3-9 Well •s. ~ '~`'°~~''~~ North Slope Borough, Alaska Sample No.: 1-13R Depth: 2b80.02 feet Visible Light w. Y.T Longitudinal ~~ Y.0 ~.5 2i Ultraviolet Light Chevron North Americ^ Exploration 8c Production ~~_39032 ,, M ~ I UNOCAL Mastodon ~-3-9 Well '~'°°'~~'~~ North Slope Borough, Alaska Sample No,: 1-1 dR Depth: 26$5.04 #eet Visible Light ~~ ~.g ~~ Longitudinal ~o ,.p ~$ sw Ultraviolet Light Chevron North America Exploration & Production HH-39032 N, UNOCAL Mastodon b-3-9 Well '' ~ : `°"'~~'~~ Noah Slope Borough, Alaska Sample No.: 1-15R Depth: 2b89.90 feet Visible Light o~ .~ AA X9.5 2A kV~ ~ 1I1 ~"uN i -r ~ h~ 1~ ~^ :g?¢ ,. 4~ - t,: . ~ d 7 Longitudinal a~ ti~ a .~a ro~ ao Ultraviolet Light Chevron North America Exploration 8c Production H~_3~p3~ I UNOCAL Mastodon 6-3-9 Well ~` ~~'~~ North Slope Borough, Alaslra Sample NVa.: 1-1 G'~ Depth: 2694.98 #eet Visible Ught am um A..O X8.5 2b Lo~gi#udir~al .2x am a.e ro.~s zee Ultraviolet Ught ~~ Chevron North America Exploration & Production 1-11-1-38032 1Vt~l visible light UNOCAL Mastodon 6-3-9 Well `a "~ North Slope Borough, Alaska Sample No.; 1-17R Depth; 2705.00 feet 2x ~ fn 9.0 9.5 2.g Longitudinal ~~ e.o q,5 P.O Ultraviolet Light Chevron North America Exploration & Production HH-39032 M ~ I UNOCAL Mastodon 6-3-9 Wel! `~'~~'~~ North Slope Borough, Alaska Sample No..: Depth: 2x ~~ 1-1$R 2715,00 feet A..O Ob ~.~. iA ~'. ~. a.a q.s za Visible Light ~ ., .. Longitudinal Ultraviolet Light ~~ Chevron North America Ex loration & Production p ICI-I-39032 N I UNOCAL Mastodon ~-3-9 Well -- '"~ North Slope Borough, Alaska Sample No.: 1-19R Depth : 2 720.10 feet Visible Light 2x ~, ~~ ,o as z.a ,, ~ongitudinai :~ cm ;q A :a a.3 2.a Ultraviolet Light Chevron North America Exploration & Production ~~-39032 M N ~ UNOCAL Mastodon 6-3-9 Well E. ~~t. "~~~ North Slo a Borou h, Alaska p 9 Sarnple No.: Depth : 1-20R 2730.01 feet Visible Light ~~ .~ ~.. .s x ._ ~ ~~ d% ~-~ ~ -~ ,a :, .. ~ : -=- . -,-: t~~ ~$, ~~~~~r '~R Longitudinal ~~ Y.m X0.5 20 Ultraviolet Light Chwron North America Exploration & Production ~~_3~p~2 M ~ I UNOCAL Mastodon 6-3-9 Well = ~~~` ~ `~`'°'~'°°"~° ~~ North Slope Borough, Alaska Sample No.: 1-21 R Depth: 2780,11 feet Visible Light ~~ a .a a.s xo Longitudinal zx ~~ ,~ ~s Ultraviolet Light Chevron North America Exploration & Production ~~-39032 M ~ ~ UNOCAL IVlastodon 6-3-9 Well '~''°'~"~~''~~ North Slope Borough, Alaska Sample No.: 1-2~R Depth: 2785.11 feet Visible Ught ~~}- z~ om hn 4 e ,A a.x z,o Longitudinal om Sn Ai0 OS SJO Ultraviolet Ught Chevron North America Exploration & Production HH-39032 M N ~ UNOCAL Mastodon 6-3-9 Well t.atmratories, Mnc. OI I N ~ h Slope Borough, Alaska Sample No.; Depth ; 1-23R 2793.01 feet Visible Light 2x ~~ ~.. ~s za Longitudinal ~~ a.e a.s ~y ~, .~ 9t ~ yy v ~ . / e ~% Ultraviolet Light Chevron North America Exploration & Production HIS-39032 I UNOCAL Mastodon 6-3-9 Well ~~` "~~ ~~ North Slope Borough, Alaska Sample No.: 1-2~4R Depth; 280.02 fleet Visible Light ZK tmo bn t.0 Y.3 20 Longitudinal ~~ ,. X1.5 ~~ Ultraviolet Light ~ ~: Chevron North America Exploration & Production HH-39032 M N ~ UNOCAL Mastodon 6-3-9 Well i L '~'`'~`°~~ "~~ North Slope Borough, Alaska Sample No.: 1-25R Depth: 2815.01 feet Visible Light 2x ~~ Y.O 0.5 I 2.9 I .~ ~- - - ~ ~ ~- z. {,~r Longitudinal 2x ~~ i_0 ~0 5 Y.~D Ultraviolet Light Chevron North America Exploration & Production HH-39032 M ~ I UNOCAL Mastodon b-3-9 Well -- "~°'~"°~~'^~~ North Slope Borough, Alaska Sample No.: 1-26R depth; 3040..06 feet Visible Light ~~ am i4~ Y.! O.~b 2i® Longitudinal 2x A.6 N5 2q1 Ultraviolet Light Chevron North America Explora#ion & Produc#ion HH-39032 I UNOCAL Mastodon b-3-9 Weli '~~~'~~ North Slope Borough, Alaska Sarnp~e No.: 1-27R Depth : 3049.94 feet Visible Light ~~. ~~ 2x ,.ro ..s z~e Longitudinal ~~ ~n e.~ x.ro Uifiaviolet Light Chevron North America Exploration & Production HH_3~gp3~ N ~ UNOCAL Mastodon b-3-9 Well ~' "~~'~. North Slope Borough, Alaska SampNe No.: 1-28R Depth: 3055.00 feet Visible light ~~ a~ ,~ OS 2~0 ~~ 4 ~~.~~ ~.F Longitudinal am iia A'0 %0.!5 4.W Ultravioret Ught Chevron North America Exploration & Production ~~-39032 M N ~ UNOCAL Mastodon 6-3-9 Well `'~ North Slope Borough, Alaska Sample No.: 1-29R Depth: 3065.61 feet Visible Light ~. ~.. 9_S 2A " r. Longitudinal ~~ .,. .~s ~.. Ultraviolet Light ~ Chevron North America Exploration & Production ~~-39032 M ~ ~ UNOCAL Mastodon 6-3-9 Well ,ti s,~. North Slope Borough, Alaska Sample IVo.; Dep#h: ~~ a.. 2A ~~ ~_~ Y1.3 2l9 1-30R 30b9.9b feet Visible Light ~_ ~: . Longitudinal Ulbaviolet Ught Chevron North America Exploration & Production HH-39032 M ~ I UNOCAL Mastodon 6-3-9 Well ~~'~ North Slope Borough s Alaska Sarx~p~e IVo.: Depth: i-3iR 3110.00 feet Visible Light ~~ ,.re bs YA Longitudinal lac ~, an a_o ~n,~ z.~o Ultraviolet Ught Chevron North America Exploration & Production ~~-3'9032 I UNOCAL Mastodon ~i-3-91Nell '~°~'~~ North Slope Borough, Alaska Sample Na,: 1-3212 Dep#h : 3153.02 feet Visible Light ~; e~ os i s.p e ~d .> . Longitudinal ~~ 4~0 X0.5 YA Ultraviolet Licht MNI Laboratories, Inc. RUN 2 Rotary Sidewall Core Photography for Chevron North America Exploration and Production UNOCAL Mastodon 6-3-9 Well North Slope Borough, Alaska Omni File No. HH-39032 Chevron North America Exploration & Production HH-39032 M N ~ UNOCAL Mastodon 6-3-9 Well =~ '-~°~'~~ North Slope Borough, Alaska Sample No.: 2-1 R Depth: 3185.22 feet Visible Light ~~ ,~ l.5 2A Longitudinal ~~ ,.~ ~.3 Y.9 Ultraviolet Ught Chevron North America Exploration & Production ~~k ~ N I UNOCAL Mastodon 6-3-9 Well `~°~;°^~ "~ North Slope borough, Alaska Sample No.: 2-2R Depfih: 3289.97 feefi Visible light ~~ ~.o ..s ~.. LongitudinaN ~~ ,,. as ~~ HF1-39032 Ultraviolet Light Chevron North America Exploration & Production HH-390,32 M ~ ~ UNOCAL Mastodon b-3-9 Well VIVIIVI UNOCAL Ma iodon b-3-9 Well "°"•" NorIM1 $bpe BOrWgM1, Alasko ~ `~~°'~'~. North Slope Borough, Alaska samwa na.. Sample No„ 2-3R ym-. azes oa ~~ Depth; 3295.04 feet Visible Light ~x ~m i..9 d.5 Li Longitudinal ~~ ~.~ ~.3 2.0 Ultraviolet Ught Chevron North America Exploration & Production I UNOCAL Mastodon b-3-9 Well "~°r'°°'"~'`"°~ North Slope Borough, Alaska Sample No.; 2-~R De{~th; 3125.21 feet Visible Light ~; ~.o m.5 Y.9 Longitudinal ~~ A.'0 X8.5 :YJO ~~ HH-39032 Ultraviolet fight Y Chevron North America Exploration & Production Ny_39~3~ ~f. UNOCAL Mastodon fi-~3-q Well "~~ North Shope Borough, Alaska Sample hlo.: Depth: 2-5R 3444.98 feet Visible Light 8m ~.O Q.3 2~0 Lox~gitudN~al gem hn h..q '0.5 2.b '..-rF ~1i 8~ ,~ , `- ~' ~' r r,` f s ~`.'1~ . ,~~~ , , _ s . ~ ~ ~~ ~, naR ~ D x MM1 ~~ ~ vav~ ~O, Ul~bravoMet Uight Chevron North America Exploration & Production HH-39032 N I UNOCAL Mastodon 6-3-9 Well ~ =~ ~ ~`~°~" ~°~ North Slope Borough, Alaska Sa~nnple No.: 2-6R Depth: 3450.05 feet Visible Light ~~ ,n ,,.~ Y.m Longitudinal z~ ~~ ~.a ~.~ x.w Ultraviolet Light Chevron North America Exploration & Production HH-39032 ~• ? ' ~ ~ I UNOCAL Mastodon b-3-9 Well ~r ~~ ~`~ Norfih Slope Borough, .,Alaska Svrrtple No.: 2-7R Depth: 3529.92 feet Visible light ~~ ,:~ ®s Z.~ ~ x~ cm M1n 'AA qJ5 ~.ro Longitudinal .. Ultraviolet Ught Chevron North America Exploration & Production ~~-39032 N I UNOCAL Mastodon 6-3-9 Well ~~ ~~, *~ North Slope Borough, Alaska Sarx~pie No.: 2-8F~ Depth: 3540.02 feet Visible Ught cm in 4A b,~ 210 longitudinal z,~ om do A..NI '0 5 310 Ultraviolet iUght Chevron North America Exploration & Production l-ll-M-39®32 M ~ I UNOCAL Mastodon 6-3-9 Well '~ f 4 ~r~s, ~`~ North Slope Borough, Alaska ~arnple Na.: 2-9R Depth: 3584,99 feet Vsible Light a:~, i QS 2i0 x~ ~~ -~ ~_n ~3 ~.~ Longitudinal 3 Ultraviolet Light Chevron North America Exploration & Production M N I UNOCAL Mastodon 6-3-9 Well '~"~_°~~ ~ North Slope Borough, Alaska Sample No.: 2-1 OR Depth: 3669.90 feet Visible Light 2x ~~ ~.o 9.5 Y.O Longitudinal ~~ ,_® 0.5 ~.o ~ t '~° +k _ ~ HH-39032 Ultraviolet Light Chevron North America Exploration & Production l'~~1-39032 I UNOCAL Mastodon 6-3-9 Well '~°~'°°~~'~~ North Slope Borough, Alaska SarrApNe No,: Depth: 2-11 R 3688.90 feet Vsible Light am iin a .r as z,o _„_, ~i ~ ,'max ~`~ i~r% ~y ,' Longitudinal Zx ~~ ,_~ .s Ultraviolet Light Chevron North America Exploration & Production HIH-39032 N I UNOCAL Mastodon 6-3-9 Well °'~- North Slope Borough, Alaska Sample No,: 2-12R Depth: 3699.93 feet Visible Light ~~ 9.9 N.5 5` ~`~: ;' :. ttiA 2~0 Longitudinal ~. 9.9 flS 210 Ultraviolet Light Chevron North America Exploration $c Production l-ll-1-39032 I UNOCAL Mastodon b-3-9 Vd/ell '`°~'~~ North Slope Borough, Alaska Sample No.: ~-13R Depth; 3705.07 feet Visible Ught mom iin A..9 4.5 2i0 Longitudinal ~, ,,m $s ~~ Ultraviolet Light ~ A Chevron North America Exploration Sc Production HH-39032 _~ M N I UNOCAL Mastodon 6-3-9 Well tee, ~. North Slope Borough, Alaska Sample No.; 2-1 ~4R Depth; 3755.02 feet Visible Light a~. . ~, . j. _- . +a .. ..~. ~. Z'K cm yn 9.~i fl.5 2.0 Longitudinal ~x om is 9A ~B 5 70 Ultraviolet Light Chevron North America Exploration & Production HH-39032 ' ~ N I UNOCAL Mastodon 6-3-9 Well ~~~'~~ North Slope Borough, Alaska Sample No.: 2-15R Depth: 3780.13 feet Visible Light ~. e~ u zs Longitudinal 2x am in A.® i.'6 2:~ Ultraviolet Light Chevron North America Exploration & Production HH-39032 ,. M N I UNOCAL Mastodon 6-3-9 Well ~ ~~ ~ ~ • ~ '~~°'a'""~ ""~ North Slope Borough, Alaska Sample No.: 2-16R Depth: 3814.99 feet Visible Light ~~ ,_o ..s ~~ m~ ~m ~ a ~ ~. ~~: ~ , ~ u Longitudinal ~~ ~, ~_4 0.s Zo Ultraviolet Light Chevron North America Exploration & Production I-IIH_39U32 N I UNOCAL Mastodon b-3-9 Well ~'~'~'~~ North Slope Borough, Alaska Sample No.: 2-17R Depth: 3829.98 feet :i Longitudinal ~~ ~_~ y.$ zv Ultraviolet Light Chevron Borth America Exploration & Production Hi-I-39032 M ~ ( UNOCAL Ma~odon c5-3-9 Well ..~~~ ~ '~°~'~. North Slope Boroughy Alaska Sarr~ple Nlo.; 2~-18R Qepth; 38~t0.07 #eet Visible light ~m qn ~_~ X0.3 Z.~ Longitudinal cm do Ap O.5 3J0 ~: ~:' UNtraviolet bight chevron North America Explorcxtion & Production l~H-39032 N ( UNC)CAL Mastodon b-3-9 VI/ell ~, ~. North Slope Borough, Alaska Sample No.: 2-19R Depth: 3850.02 feet Visible light z~ f YN 9S 3.b ._ r~.~A6 ~ ~ .. Longitudinal yam iai A.1B '0.6 2.b Ultraviolet Light ~~ AA Chevron North America Exploration & Production HH-39032 IY1 Visible Light UNOCAL Mastodon 6-3-9 Well a,'~ North Slope boroughs Alaska Sample No.: 2-20R Depth: 355.04 feet p9 p 0_B ~.S 21B Longitud~na~ 3x ~, n.o as z.s Ultraviolet Light Chevron North America Exploration 8c Production ~~-39032 UNOCAL Mastodon 6-3-9 Weil ~' ~~,'~. North Slope Borough, Alaska Sample No„ 2-21 R Depth; 3860.24 feet Visible Ught ~~ ,o 0.5 2.0 ~_ ~~ ,~ ~ ~:~~ ~~~ ;e~« _~, .s. Lo~ngitu~dinal ~~ an m 7 0 0.5 3.0 Ultraviolet Light ~.y Chevron North America Exploration & Production UNOCAL Mastodon b-3-9 WeN - `~°~°^~~'~~ North Slope Borough Alaska Sample No.: 2-22R Depth: X435,04 feet Visible Light ~. ,~ ~~ ~s ~~ ~~ e.o b.s xs Longitudinal I-IH-39032 Ultraviolet Light Chevron North America Exploration & Production HH-39032 1 M ~ I UNOCAL Mastodon b-3-9 Well °~''°'~`°"'~'"~ North Slope Borough, Alaska i Sample No.: 2-23R Depth: 4445.05 feet Visible Light ~~ a .e ®.5 2lB .. Longitudinal ~~ a.o i1.5 3.0 Uldaviolet Light Chevron North America Exploration & Production -.z. ~ ~ I UNOCAL Mastodon 6-3-9 Well . ~~. North Slope Borough, Alaska Sample No.: 2-24R Depth: 4460.02 feet Visible Light ~~ ,.. e.s ze Longitudinal ~~ ,.e es 2.9 HH-39032. Ulbravioiet Light Chevron North America Exploration & Production HH1-39032 UNOCAL Mastodon 6-3-9 Well ~` `~~~ "~`~ North Slope Borough, Alaska Sample No..: 2-25R Depth: 4475.08 feet Visible Light 2x 9.0 o.s s.a Longitudinal ~~ ~, YO 0.5 2.0 Ultraviolet Light Chevron North America Exploration & Production HH-39032 • ~ M N I UNOCAL Mastodon 6-3-9 well ~~ 3- °~`~"°~'^~~ North Slope Borough, Alaska Sample No„ Depth 2-26R 4485,01 feet Visible Light 2x ~~ ,.r 4,5 26 ~~ ,~ Longitudinal x~ ~~ 4.0 ~~ ~.~ ~~ .,,~ y~ :~ Ultraviolet Light Chevron North America Exploration & Production ~}~-39032 N ~ UNOCAL Mastodon b-~-9 Weli ~~ '~. North Siope Borough, Alaska Sample No,: 2-2712 Depth: 4~95,1b feet Visible Light G1R AA e.~o I as 2.U K Longitudinal z~ cm an 1.10 '0.$ 2~0 Ultraviolet Light
