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211-131
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 b direct inspection of the file. It - 13 I Well History File Identifier Organizing (done) ❑ Two-sided ❑ Rescan Needed RE CA OVERSIZED: NOTES: C or Items: ❑ Maps: Grayscale Items: s: ❑ Poor Quality Originals: ❑ Other: ❑ Other: BY: CM,aria ) Date: v/c /I17t. /s/ Me Project Proofing BY: 411EIPDate: a `� /s/ 111 P Scanning Preparation l x 30 = 3 0 + aa = TOTAL PAGES 31, (Count does not include cover sheet) BY: Maria Date: cSpif /s/ V'/I Production Scanning Stage 1 Page Count from Scanned File: S3 (Count does include covers eet) Page Count Matches Number in Scanning Pre aration: YES NO BY: r .. Date: g a itt /s/ 114 j0 Stage 1 If NO in stage 1, page(s) discrepancies were found: YES NO , BY: Maria Date: /s/ Stage 2 Additional Well Reports: YES r:11)) TOTAL PAGES: Digital version appended by: Meredith Michal Date: /s/ Final Page Count: Stage 1 + Stage 2: TOTAL PAGES: Scanning is complete at this point unless rescanning is required. ReScanned BY: Maria Date: /s/ Comments about this file: Quality Checked 7/8/2014 Well History File Cover Page_20140708.doc o ,- (n a) 0) c J.V E O n. 0 a1 Q t :r J �2 - f0 o O co co m N m E o 'c 2 N a. 0 •. J 0 0 N z 0 C7 W CO a) a) 2 U TT; al No ce E = + y N U > C d N (4 ' V ''.. 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ZI �_ . w w z0 I o a .0 .0 .7 CI d 0 o 0 i Z Z '.0 to N E ' J 7 7 .V/ .N N M .'CO (n a) a) a a a) _ — Z 7 HC C C C ce Q' C Q) a) O O 0 O O 3 m coEd 0 7 7 E E 7 o Z o -O CO (a v C Co - - c c c r O C7 C7 — — — ns Z w € O p �I Z J O CD N O H .r H co cl ~ 0 d a) R 7 N C 2 >- Q Z -c o W O Z 0 c i p N re O P O ac E y a c.. LL 1 _ i •E 2 o C " ti o rn coN R J 0 O 0 o _m'o Q �\ J y z Z v u (�• 4-1 ... .-- lJJ LL d OJ O a) H'O C LT, E a v? J 0 —p U CO E y 0 w a o m °) o a o 0 0 o O a) a) :E c m o d D F- J O H I� W J J J J W 3 Q 5 0 Q U 0 I 0 o N a) Z i (_`I N N U : i o 5 i 4 0 N a z H. :1)- Y. a J �1 U O "I Z 2 N a) N c a � r�/ J O cc Q .- 0 Z oa LU gLe 0a LU w J U m o Z Q s AN _J d o .E.3 a co 1N Z. Fri') n E 0 N U 0) J J a z o N W I nw �/� N v/ p I Qo Q o a z E 0 3 0 E raz 3 TE, , I a ° m M .0 3 N m N ci co OV C 2r R E I E 0 E 2-k\--\3\ 2.«23 Main HUGHES www.bakerhughes.com PRINT DISTRIBUTION LIST COMPANY BP EXPLORATION(ALASKA), INC COUNTY NORTH SLOPE BOROUGH WELL NAME W-21AL1 STATE ALASKA 1-IELU PRUDHOE BAY UNIT UAI L 6/6/2012 THIS DISTRIBUTION LIST AUTHORIZED BY: Alfredo Martinez SO#4277104 Log CD Log CD Copies Copies Client/ Partners Copies Copies Client/ Partners 2 1 Company BP EXPLORATION(ALASKA), INC Company Person PETROTECHNICAL DATA CENTER Person Address LR2-1 Address 900 E BENSON BLVD ANCHORAGE,AK 99508 1 1 Company EXXON MOBIL PRODUCTION CO Company Person FILE ROOM Person Address 800 BELL STREET Address EMB GSC 3082 A HOUSTON,TX 77002 1 1 Company STATE OF ALASKA-AOGCC Company Person CHRISTINE MAHNKEN Person Address 333 W.7TH AVE. Address SUITE 100 ANCHORAGE,AK 99501 Company Company Person Person Address Address Company Company Person Person Address Address Company Company Person Person Address Address Page 1 of 1 • 211 -L31 Letter of Transmittal BAKER Date: February 21, 2012 HUGHES To: From: State of Alaska AOGCC Baker Hughes INTEQ 333 W. 7th Ave., Suite 100 795 East 94th Avenue Anchorage, Alaska 99501 Anchorage,Alaska 99515 Bill Michaelson Please find enclosed the directional survey data for the following well(s): U-12AL 1 2_A\-\0.1 M-17AL 1 PB 1 M-17AL1 2k P-01APB1 P-01APB2 P-01APB3 P-01A 2A-\\G RECEIVED 06-12B 06-12BL1 Z`t-tv-1 W-21AL1 W-21AL1-01 o 2„v 3 FEB 2 3 201Z AOGCC Enclosed for each well(s): 2 hardcopy prints of directional survey reports 1 compact disk containing electronic survey files Please sign and return one copy of this transmittal form to: BP Exploration (Alaska) Inc. Petrotechnical Data Center, LR2-1 900 E. Benson Blvd. SCANNED MAR 2018 Anchorage, Alaska 99508 to acknowledge receipt of this data. RECEIVED BY: AL u State of Alaska AOGCC DATE: $f G l2. • • I• IMOl BAKER HUGHES INTEQ North America - ALASKA - BP Prudhoe Bay PB W Pad W-21 RECEIVED 500292192900 W-21AL1 FEB 2 3 2012 AOGCC Survey: MWD Survey Report - Geographic 28 December, 2011 •BAKER0 p ,l HUGHES Survey Report Geographic • ,1 INTEQ , K Company: North America-ALASKA-BP Local Co-ordinate Reference: Well W-21 Project: Prudhoe Bay TVD Reference: W-21A Revised @ 82.72ft(W-21A Revised) Site: PB W Pad MD Reference: W-21A Revised @ 82.72ft(W-21A Revised) Well: W-21 North Reference: True Wellbore: W-21AL1 Survey Calculation Method: Minimum Curvature Design: W-21AL1 Database: EDM .16-ANC Prod-WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +NI-S +E/-W Northing Easting (ft) (°) (°) (ft) (ft) (ft) (ft) (ft) Latitude Longitude 10,463.15 76.55 106.81 8,934.72 2,119.26 2,737.78 5,961,790.80 614,754.72 70° 18' 16.002 N 149°4' 13.385 W TIP 10,473.50 77.05 107.25 8,937.09 2,116.31 2,747.42 5,961,787.99 614,764.39 70° 18'15.973 N 149°4' 13.104 W KOP 10,490.44 78.53 107.25 8,940.67 2,111.40 2,763.23 5,961,783.32 614,780.27 70° 18'15.924 N 149°4'12.643 W 10,520.34 84.93 107.25 8,944.97 2,102.63 2,791.47 5,961,774.97 614,808.64 70° 18'15.838 N 149°4'11.819 W 10,550.45 84.64 112.50 8,947.71 2,092.44 2,819.66 5,961,765.20 614,836.98 70° 18'15.738 N 149°4'10.998 W 10,580.19 85.12 117.96 8,950.36 2,079.82 2,846.45 5,961,752.98 614,863.95 70° 18'15.613 N 149°4'10.217 W 10,610.23 83.60 123.81 8,953.32 2,064.49 2,872.09 5,961,738.03 614,889.81 70° 18'15.463 N 149°4'9.469 W 10,640.30 84.09 129.10 8,956.55 2,046.73 2,896.13 5,961,720.63 614,914.11 70° 18' 15.288 N 149°4'8.768 W 10,670.66 82.86 136.73 8,960.00 2,026.21 2,918.20 5,961,700.45 614,936.49 70° 18' 15.086 N 149°4'8.125 W 10,700.66 85.11 142.98 8,963.15 2,003.41 2,937.42 5,961,677.94 614,956.05 70° 18' 14.862 N 149°4'7.565 W 10,730.68 86.58 150.62 8,965.33 1,978.38 2,953.81 5,961,653.16 614,972.80 70° 18'14.615 N 149°4'7.087 W 10,760.69 86.99 155.70 8,967.01 1,951.65 2,967.33 5,961,626.64 614,986.72 70° 18'14.352 N 149°4'6.693 W 10,790.59 88.10 162.37 8,968.29 1,923.77 2,978.01 5,961,598.92 614,997.81 70° 18'14.078 N 149°4'6.382 W 10,817.41 92.85 167.95 8,968.07 1,897.86 2,984.87 5,961,573.12 615,005.06 70° 18'13.823 N 149°4'6.182 W 10,850.52 90.03 173.23 8,967.24 1,865.22 2,990.28 5,961,540.57 615,010.96 70° 18'13.502 N 149°4'6.025 W 10,880.96 90.34 177.07 8,967.14 1,834.90 2,992.86 5,961,510.29 615,013.98 70° 18'13.204 N 149°4'5.950 W 10,910.46 92.86 180.53 8,966.31 1,805.42 2,993.47 5,961,480.83 615,015.04 70° 18' 12.914 N 149°4'5.933 W 10,926.16 93.35 181.30 8,965.46 1,789.75 2,993.22 5,961,465.15 615,015.02 70° 18' 12.760 N 149°4'5.940 W 10,940.33 92.55 180.30 8,964.73 1,775.60 2,993.03 5,961,451.00 615,015.03 70° 18' 12.621 N 149°4'5.946 W 10,970.39 90.58 177.13 8,963.91 1,745.56 2,993.70 5,961,420.98 615,016.16 70° 18' 12.325 N 149°4'5.927 W 11,000.37 90.34 173.71 8,963.67 1,715.69 2,996.09 5,961,391.15 615,018.99 70° 18'12.032 N 149°4'5.857 W 11,031.27 89.20 170.67 8,963.80 1,685.08 3,000.29 5,961,360.61 615,023.65 70° 18'11.731 N 149°4'5.735 W 11,060.22 89.36 167.06 8,964.16 1,656.68 3,005.88 5,961,332.30 615,029.66 70° 18'11.451 N 149°4'5.573 W 11,080.78 88.28 164.89 8,964.58 1,636.74 3,010.86 5,961,312.43 615,034.94 70° 18'11.255 N 149°4'5.428 W 11,100.58 86.16 162.01 8,965.54 1,617.78 3,016.49 5,961,293.57 615,040.85 70° 18'11.069 N 149°4'5.264 W 11,120.82 86.71 160.73 8,966.80 1,598.64 3,022.95 5,961,274.53 615,047.59 70° 18'10.880 N 149°4'5.076 W 11,140.77 88.74 158.07 8,967.60 1,579.98 3,029.96 5,961,255.98 615,054.88 70° 18' 10.697 N 149°4'4.871 W 11,170.69 91.29 153.55 8,967.59 1,552.70 3,042.22 5,961,228.88 615,067.54 70° 18' 10.428 N 149°4'4.514 W 11,200.47 94.15 149.79 8,966.17 1,526.52 3,056.33 5,961,202.92 615,082.04 70° 18'10.171 N 149°4'4.103 W 11,230.67 94.67 145.25 8,963.85 1,501.13 3,072.49 5,961,177.77 615,098.58 70° 18'9.921 N 149°4'3.632 W 11,261.24 94.76 140.86 8,961.34 1,476.79 3,090.80 5,961,153.71 615,117.24 70° 18'9.682 N 149°4'3.099 W 11,291.32 96.46 141.53 8,958.40 1,453.46 3,109.56 5,961,130.66 615,136.35 70° 18'9.452 N 149°4'2.552 W 11,320.88 96.89 147.04 8,954.96 1,429.63 3,126.69 5,961,107.10 615,153.83 70° 18'9.218 N 149°4'2.053 W 11,350.95 94.82 151.04 8,951.89 1,403.98 3,142.07 5,961,081.68 615,169.59 70° 18'8.965 N 149°4'1.605 W 11,381.03 92.49 154.32 8,949.97 1,377.32 3,155.85 5,961,055.23 615,183.76 70° 18'8.703 N 149°4'1.203 W 11,410.85 91.72 159.59 8,948.88 1,349.91 3,167.51 5,961,028.00 615,195.83 70° 18'8.434 N 149°4'0.864 W 11,440.94 92.85 157.51 8,947.68 1,321.93 3,178.50 5,961,000.18 615,207.24 70° 18'8.158 N 149°4'0.543 W 11,470.90 90.80 155.20 8,946.72 1,294.50 3,190.51 5,960,972.94 615,219.65 70° 18'7.888 N 149°4'0.194 W 11,502.86 89.48 150.03 8,946.64 1,266.13 3,205.21 5,960,944.80 615,234.77 70° 18'7.609 N 149°3'59.766 W 11,530.80 90.46 146.67 8,946.66 1,242.35 3,219.87 5,960,921.24 615,249.78 70° 18'7.375 N 149°3'59.338 W 11,561.01 90.83 141.80 8,946.32 1,217.85 3,237.52 5,960,897.00 615,267.79 70° 18'7.134 N 149°3'58.824 W 11,591.07 89.57 137.98 8,946.21 1,194.86 3,256.88 5,960,874.31 615,287.49 70° 18'6.908 N 149°3'58.260 W 11,620.47 89.39 133.55 8,946.48 1,173.80 3,277.38 5,960,853.56 615,308.31 70° 18'6.701 N 149°3'57.662 W 11,650.32 89.79 128.99 8,946.69 1,154.12 3,299.81 5,960,834.22 615,331.02 70° 18'6.507 N 149°3'57.009 W 11,680.32 88.34 125.49 8,947.18 1,135.97 3,323.69 5,960,816.43 615,355.17 70° 18'6.329 N 149°3'56.313 W 11,710.62 86.68 121.43 8,948.50 1,119.28 3,348.93 5,960,800.12 615,380.66 70° 18'6.165 N 149°3'55.577 W 11,740.68 87.42 117.54 8,950.05 1,104.51 3,375.06 5,960,785.74 615,407.00 70° 18'6.019 N 149°3'54.815 W 11,770.71 88.56 114.63 8,951.10 1,091.32 3,402.01 5,960,772.95 615,434.14 70° 18'5.889 N 149°3'54.030 W 11,800.73 86.01 112.19 8,952.52 1,079.40 3,429.53 5,960,761.45 615,461.83 70° 18'5.772 N 149°3'53.228 W 11,830.89 85.02 108.65 8,954.88 1,068.91 3,457.70 5,960,751.38 615,490.15 70° 18'5.669 N 149°3'52.407 W 11,850.69 84.93 105.21 8,956.62 1,063.17 3,476.57 5,960,745.92 615,509.10 70° 18'5.612 N 149°3'51.857 W 11,895.00 84.93 105.21 8,960.53 1,051.59 3,519.16 5,960,734.98 615,551.85 70° 18'5.498 N 149°3'50.615 W TD 12/28/2011 11:58:18AM Page 3 COMPASS 2003.16 Build 73 Page l of 1 1111 Schwartz, Guy L (DOA) From: Leemhuis, Jacob [Jacob.Leemhuis@bp.com] Sent: Thursday, January 19, 2012 7:27 AM To: Schwartz, Guy L (DOA) Subject: RE: W-21AL1 (PTD 211-131) Guy, Slickline came in post rig and attempted to fish it but couldn't get past the first gas lift mandrel. It is on the schedule to run a camera down to see exactly what is the hold up mechanism. Jacob From: Schwartz, Guy L(DOA) [mailto:guy.schwartz@alaska.gov] Sent: Wednesday, January 18, 2012 4:41 PM To: Leemhuis, Jacob Cc: Saltmarsh, Arthur C (DOA) Subject: W-21AL1 (PTD 211-131) Jacob, I reviewed the 407 for the CTD completion just recently. Has there been any more work done to retrieve the Whipstock set at 10472'. Is it capable of flow as is or does it have to be removed for any contribution from the motherbore? Guy Schwartz Senior Petroleum Engineer AOGCC 793-1226 (office) 444-3433 (cell) 1/19/2012 McMains, Stephen E (DOA) From: Lastufka, Joseph N (Northern Solutions) [Joseph.Lastufka@bp.com] Sent: Tuesday, May 01, 2012 11:35 AM To: McMains, Stephen E (DOA) Subject: FW: PBU W-21A Multi Lateral/ PTD#201-111 Hi Steve, Fri) J 13 Please reference the following well: Well Name: PBU W-21A Permit#: 201-111 API #: 50-029-21929-01-00 This well consists of 2 Laterals as well: Well Name: PBU W-21AL1 / L1-01 Permit#: 211-131 /211-132 API #: 20-029-21929-60-00/61-00 These 2 Laterals were recently drilled, and why we're submitting the initial test. Date of Test: 4/22/2012 Type of Test: IPT (Initial Production Test) Choke Size: 176 Choke Unit: 64ths Production Method: Flowing Duration (Hours Tested): 8 Top Reference (Top Perf MD): W-21A: 10464' W-21AL1: 10529' W-21AL1-01: 10505' Bottom Reference (Bottom Perf MD): W-21A: 14785' W-21AL: 11883' W-21AL1-01: 11736' Tubing Flowing (Pressure): 640 Casing Pressure: 1720 Total Test(Rate f/0, W, G): 2301 / 1242/2493 24-Hour Rate (0, W, G): 6903/3726/7479 Gravity (Oil, API): Not Available GOR (Gas-Oil Ratio): 1084 This well began Production on: 4/22/2012 Method of Operations on this date: Flowing 1 RECE /ED STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPO 5 1,NP 1 „,3, Commission la. Well Status: ® Oil 0 Gas 0 SPLUG 0 Other 0 Abandoned 0 Suspended 1 b. Well ClasAnthor igle 20AAC 25.105 20AAC 25.110 2 Development 0 Exploratory 0 GINJ 0 WINJ 0 WAG 0 WDSPL 0 Other No.of Completions One 0 Service 0 Stratigraphic 2. Operator Name: 5.Date Comp.,Susp.,or Aband.: 12. Permit to Drill Number: BP Exploration(Alaska) Inc. 12/19/2011 211-131 3. Address: 6.Date Spudded: 13. API Number: P.O. Box 196612,Anchorage,Alaska 99519-6612 12/7/2011 50-029-21929-60-00 4a. Location of Well(Governmental Section): 7.Date T.D.Reached: 14. Well Name and Number: Surface: 12/11/2011 PBU W-21AL1 626' FNL, 1180'FEL, SEC.21,T11 N, R12E, UM 8. KB(ft above MSL): 82.72' 15.Field/Pool(s): Top of Productive Horizon: 1501'FSL, 1539'FWL, SEC. 15,T11 N, R12E, UM GL(ft above MSL): 53.06' Prudhoe Bay/Prudhoe Bay Total Depth: 9.Plug Back Depth(MD+TVD): 427'FSL,2340'FWL, SEC. 15,T11 N, R12E, UM 11895' 8961' 4b. Location of Well(State Base Plane Coordinates,NAD 27): 10.Total Depth(MD+TVD): 16. Property Designation: Surface: x- 612049 y- 5959631 Zone- ASP4 11895' 8961' ADL 028263&047451 TPI: x- 614731 y- 5961798 Zone- ASP4 11.SSSV Depth(MD+TVD): 17. Land Use Permit: Total Depth:x- 615550 y- 5960737 Zone- ASP4 None 18. Directional Survey: ® Yes 0 No 19.Water depth,if offshore: 20. Thickness of Permafrost(TVD): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1900'(Approx.) 21.Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): 22. Re-Drill/Lateral Top Window MDlTVD: MWD DIR, GR, RES, GR/CCL/MCNL 10474' 8937' 23. CASING,LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH TVD HOLE AMOUNT CASING WT.PER FT. GRADE Top I BOTTOM ToP BOTTOM SIZE CEMENTING RECORD PULLED 20" Conductor Surface, 110' Surface 110' 13-3/8" 68# L-80 Surface 2710' Surface 2708' 17-1/2" 3840 cu ft Coldset II&III _9.-5/x__ 47# NT8OS Surface 9327' Surface 8345' 12-1/4" 2122 cu ft Class'G' _, , 7°,-,.., 26# L-80 9142' 10085' 8210' 8788' 8-1/2" 243 Cu ft Class'G' 4-1/2" 12.6# L-80 9933' 10474' 8713' 8937' 6-1/8" 696 cu ft Class'G' 2-7/8" 6.2# L-80 10510' 11895'_ 8944' 8961' 4-1/8" Uncemented Slotted Liner 24. Open to production or injection? IN Yes 0 No 25. TUBING RECORD If Yes,list each interval open SIZE DEPTH SET(MD) PACKER SET(MD/TVD) (MD+TVD of Top&Bottom;Perforation Size and Number): 2-7/8"Slotted Section 4-1/2", 12.6#, L-80 9937' 9881'/8687' MD TVD MD TVD 10529'-11883' 8946'-8960' 26. ACID,FRACTURE,CEMENT SQUEEZE,ETC. ' DEPTH INTERVAL(MD) AMOUNT AND KIND OF MATERIAL USED 10472' Set Whipstock aRe4 fie,.e _ ' ' jieltit - "1i • 27. PRODUCTION TEST Date First Production: Method of Operation(Flowing,Gas Lift,etc.): Not on Production Yet N/A Date of Test: Hours Tested: Production For OIL-BBL: GAS-MCF: WATER-BBL: CHOKE SIZE: GAS-OIL RATIO: Test Period 4 Flow Tubing Casing Press: Calculated OIL-BBL: GAS-MCF: WATER-BBL: OIL GRAVITY-API(CORR): Press. 24-Hour Rate 28. CORE DATA Conventional Core(s)Acquired? 0 Yes ®No Sidewall Core(s)Acquired? ❑ Yes ®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 250.071. None RRDMS JAN 18 2012ds Form 10-407 Revised 12/2009 CONTINUED ON REVERSE Oe" Ht./�_ - //m�it/ al Only 6 29. GEOLOGIC MARKERS(List all formations and markers encountered): 30. FvRMATION TESTS NAME MD ND Well Tested? 0 Yes ®No Permafrost Top If yes,list intervals and formations tested,briefly summarizing test Permafrost Base results. Attach separate sheets to this form,if needed,and submit detailed test information per 20 AAC 25.071. Kicked off in Sadlerochit None Top of Sadlerochit(From W-21A) 10440' 8929' 45N 10566' 8949' 45P 10644' 8957' Formation at Total Depth(Name): Sadlerochit 10440' 8929' 31.List of Attachments: Summary of Daily Drilling Reports,Well Schematic Diagram,Surveys 32.I hereby certify that the foregoing �i�s�true and coorrreectt to the best of my knowledge. Signed: Terrie Hubble��1 y J(J...46t2Title: Drilling Technologist Date: pt/1.7(1 ( PBU W-21 AL1 211-131 Prepared By Name/Number Tenie Hubble, 564-4628 Well Number Permit No./Approval No. Drilling Engineer: Jacob Leemhuis, 564-4989 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 la: Classification of Service Wells: Gas Injection,Water Injection,Water-Altemating-Gas Injection,Salt Water Disposal,Water Supply for Injection, Observation,or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI(Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level elevation 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 ND for the top and base of permafrost in Box 28. Item 23: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. Item 24: If this well is completed for separate production from more than one interval(multiple completion),so state in item 1,and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data pertinent to such interval). Item 27: Method of Operation: Flowing,Gas Lift,Rod Pump,Hydraulic Pump,Submersible,Water Injection,Gas Injection,Shut-In,or Other(explain). Item 28: Provide a listing of intervals cored and the corresponding formations,and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. Item 30: Provide a listing of intervals tested and the corresponding formation,and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 12/2009 Submit Original Only W-21 A, Well History (Pre Rig Sidetrack) Date Summary 11/15/11 T/I/0=180/250/50 Temp=Sl Assist Slickline, MIT-T PASSED to 3000 psi, MIT-IA PASSED to 3000 psi (CTD Prep) Pumped 8 bbls crude down IA to reach test pressure for MIT-IA. IA lost 48 psi in the 1st 15 min and lost 20 psi in the 2nd 15 min for a total pressure loss of 68 psi in 30 min. Bled IAP (-7.75 bbls). Pumped 2.25 bbls crude down Tbg to reach test pressure for MIT-IA.Tbg lost 107 psi in the 1st 15 min and lost 43 psi in the 2nd 15 min for a total pressure loss of 150 psi in 30 min. Bled TBGP(-2.7 bbls). FW P=350/300/50 11/15/11 SET 1" BK DGLV IN STA#1 © 9812' MD(9818' SLM). PULL 4.5"WHIDDON CATCHER SUB. LRS PREFORMED MIT-T&MIT-IA(PASSED AS PER WSL). EQUALIZED 4.5"XX PLUG © 9908'SLM. 11/16/11 PULL 4.5" XX PLUG © 9908'SLM(9905' MD). DRIFT W/10'X 3.70" BAKER DRIFT TO 10,470' SLM (TARGET 10,472) STOPPED DUE TO DEVIATION. WELL LEFT SHUT IN,TURN WELL OVER TO PAD OP. 11/18/11 T/I/O=350/360/60 Scale Inhibition (Pre CTD) Pump down Tbg with 3 stages of: 8 bbs Pre-Flush=1%KCI w/1%Techni-Wett 30 bbls Scale Inhibitor= 10%Scaletrol w/0.25%Techni-Wett in 1%KCI 200 bbls Over-Flush= 1%KCI w/1%Techni-Wett 2 stages of 17 bbls Wax Bead Diversion=720#DS Wax Beads in 1%Oil Seeker Displace TBG with 181 bbls of 1% KCL. Freeze protect with 3.8 bbls of neat and 33 bbls of diesel. Final WHPS=630/vac/590 11/19/11 WELL S/I ON ARRIVAL. RU SLICK LINE UNIT 4517 AND PT. 11/20/11 3 1/2" BAKER KB MBWS DRIFT, SD © 9382'SLM, UNABLE TO WORK PAST. WELL LEFT S/I ON DEPARTURE. PAD-OP NOTIFIED. 11/20/11 T/I/0=0/120/0; Conduct PJSM;Test SV to 300 and 3500 psi for 5 min. (passed&charted); Bleed tree from MV and torque up upper tree;Torque wrench calibrated 11-20-11; Pump#3; Power head#2; Ratchet head#1; No movement 11/24/11 MU and RIH w/BTT dummy whipstock drift assembly(13.2'long and 3.70" max OD). Drift cleanly to 10600'ctmd with no bobbles. POOH, LD tools. RDMO,Job complete. 12/01/11 T/1/0=600/260/80 Load and Kill ( Pre-CTD Sidetrack) Pumped 5 bbls neat methanol and 290 bbls 2% KCL down tubing to kill pressure. Pumped 5 bbls meth,38 bbls diesel down tubing for Freeze protect. Final WHPs Vac/0/20. 12/01/11 T/I/O=0/0/0 Conduct PJSM.Tested barriers. Rig up lubricator and tested to 300 psi. low and 3500 psi. high (passed). Set 4"CIW 'H'TWC © 118" using 1 - 1'ext. Rigged down lubricator and installed tree cap.Torque THA x Master valve flange to spec.(see log) Shell test tree to 500 psi. low and 5000 psi. high (passed). Page 1 of 1 Page 1 of 10 North America-ALASKA- BP Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C: (1,836,613.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12/2/2011 00:00 - 03:00 3.00 MOB P PRE PREPARE TO MOB RIG TO PRICE PAD. CLEAN AROUND WELL AND CLOSE OUT PERMIT. 03:00 - 06:00 3.00 MOB P PRE HOLD PJSM WITH SECURITY ON MOVING RIG. DISCUSS DROPPED OBJECTS. MOB RIG OFF OF DS6. 06:00 - 06:30 0.50 MOB P PRE CREW CHANGE. DISCUSS RIG STATUS. ROUTE DRIVE REVIEWED IN DETAIL DURING TL MTG. TP MAKES ROUTE DRIVE. 06:30 - 13:00 6.50 MOB P PRE CONTINUE MOVE FROM DS 6 TO PRICE PAD. 13:00 - 14:00 1.00 MOB P PRE PARK RIG AT PRICE PAD. PERFORM ROUTE DRIVE TO W-PAD. NOTIFY AOGCC OF UPCOMING BOP TEST 24 HRS.BOB NOBLE WAIVED WITNESS. 14:00 - 18:00 4.00 MOB P PRE CONTINUE TO MOVE FROM PRICE PAD. 18:00 - 20:45 2.75 MOB P PRE CREW CHANGE PERFORM ROUTE DRIVE WITH ONCOMING CREW. MOVE EQUIPMENT THAT WOULD BLOCK RIG. 20:45 - 00:00 3.25 MOB P PRE CONTINUE TO MOVE RIG TO W-PAD. REORIENT MATS. 12/3/2011 00:00 - 02:00 2.00 MOB P PRE CONTINUE TO MOVE RIG TO W-PAD 02:00 - 04:00 2.00 MOB P PRE MOVE SAT CAMP FROM DS 6 TO W-PAD. BLEED IA DOWN TO 0 PSI. 04:00 - 06:00 2.00 MOB P PRE RD BLEED TANK. SET MATS AROUND WELL AND RIG UP EQUIPMENT. 06:00 - 06:30 0.50 MOB P PRE CREW CHANGE. DISCUSS RIG STATUS. 06:30 - 08:30 2.00 MOB P PRE REALIGN MATS AROUND WELLHEAD. PAD LIGHT MAKING RIG MOVEMENT DIFFICULT. 08:30 - 09:30 1.00 MOB P PRE HOLD DETAILED PJSM WITH CREW. REVIEW SPOTTING PROCEDURE. ASSIGN POSITIONS. DISCUSS RADIO AND HAND SIGNAL COMMS. 09:30 - 11:30 2.00 MOB P PRE SPOT RIG ON MATS. MOVE AND CENTER OVER WELL. SET RIG DOWN. 11:30 - 15:00 3.50 MOB P PRE RIG UP ALL SUPPORT EQUIPMENT. 15:00 - 18:00 3.00 BOPSUR P PRE HOLD PJSM. ND TREE CAP. • NU BOPS. MOB CAMP ONTO LOCATION. 18:00 - 21:30 3.50 BOPSUR P PRE CREW CHANGE. PJSM FOR N/U BOP. N/U BOP EQUIPMENT. ANNULAR,TOT DOUBLE GATE (BLIND/SHEARS2 3/8"PIPE/SLIPS),MUD CROSS,TOT DOUBLE GATE(2 3/8"X 3 1/2" VBR PIPE RAMS,2 3/8"PIPE/SLIPS)AND XO TO TOP OF SWAB.CHECK TORQUE ON TREE. Printed 12/27/2011 12:41:22PM • forth America-ALASKA-BP `-Page 2 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C: (1,836,613.00) Project: Prudhoe Bay Site:PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised©82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 21:30 - 00:00 2.50 BOPSUR P PRE FUNCTION TEST BOP'S-GOOD. FUNCTION TEST FROM BOTH REMOTE PANELS. FILL STACK. R/U TO TEST BOPS THAW GAS BUSTER LINES. 12/4/2011 00:00 - 01:00 1.00 BOPSUR P PRE HOLD UN ANNOUNCED RIG EVAC DRILL- FIRE IN CUTTING BOX UNCONTROLLABLE. ALL EMPLOYEES RESPONDED TO SAT CAMP. HEAD COUNT WAS BEING CONDUCTED WITH 3 MIN OF DRILL BEING CALLED.SCS HAD ALL ACCOUNTED FOR. HE STOPPED ALL PERSONELL AT ENTRANCE OF THE PAD. HE NOTIFIED THE PAD OP OF DRILL.AAR HELD. DISCUSSED THE LOCATIONS OF ALL EVAC AREAS AS THE BLAST SHACK WAS JUT SPOTTED ON THE OPPASITE SIDE OF THE RIG. 01:00 - 06:00 5.00 BOPSUR P PRE TESTING BOPS TO 250 PSI LOW AND 3500 PSI HIGH.ALL TEST IN ACCORDANCE WITH AOGCC AND BP STANDARDS.,AND PERMIT TO DRILL. TEST WITNESSED WAIVED BY BOB NOBLE. TEST WITNESSED BY BP WSL,AND NORDIC TOUR PUSHER. 06:00 - 06:30 0.50 BOPSUR P PRE CREW CHANGE. DISCUSS OPS AND RIG STATUS. DOUBLE UP ON OUTSIDE ROUNDS DUE TO PHASE 2 WEATHER. 06:30 - 09:00 2.50 BOPSUR P PRE CONTINUE TO TEST BOP EQUIPMENT. 09:00 - 18:00 9.00 MOB N WAIT PRE STANDBY FOR WEATHER. PHASE 2 LEVEL 3 ON ALL ROADS&PADS. CONTINUE TO CLEAN AND ORGANIZE RIG INTERIOR. 18:00 - 20:30 2.50 MOB N WAIT PRE CREW CHANGE. PJSM FOR CLEANING RIG AND CLEARING COMPLEX WELL CONTROL DRILL SIMULATED WELL PRESSURE INCREASE AND THEN A LEAK DEVELOPED AT THE WELL HEAD BELOW THE TREE,PRE-SPUD MEETING. 20:30 - 00:00 3.50 MOB N WAIT PRE STAND BY FOR WEATHER 12/5/2011 00:00 - 06:00 6.00 MOB N WAIT PRE WAIT ON WEATHER.ROADS AND PADS CLEARING SNOW. REPLACE CROWN-O-MATIC RE-SET ACTUATOR. CLEANING DRAW WORKS AND LOFT. M/U INJECTOR HEAD AND PUMP LINES CLEAR OF DIESEL, PRESSURE TEST PACK OFF AND INNER REEL TO 3500 PSI. BLOW REEL BACK. POP INJECTOR OFF AND INSTALL DUAL FLAPPER CHECK VALVE BUT HAVE NOT TESTED YET. 06:00 - 06:30 0.50 MOB N WAIT PRE CREW CHANGE. DISCUSS OPS AND RIG STATUS. MAKE EQUIPMENT CHECKS AND OUTSIDE ROUNDS. 06:30 - 08:00 1.50 MOB N WAIT PRE WAIT ON BPV CREW AND ADDITIONAL FLUID FOR WELL KILL. Printed 12/27/2011 12:41:22PM Borth America -ALASKA- BP Page 3 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C: (1,836,613.00) / Project:Prudhoe Bay Site:PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:00 - 10:45 2.75 BOPSUR P PRE BRING DSM LUBRICATOR TO RIG FLOOR. HOLD PJSM TO REVIEW TWC REMOVAL PROCEDURE. RU AND PT LUBRICATOR TO 250 AND 3500 PSI FOR 10 MIN. ENGAGE AND PULL TWC TO FLOOR. NO WHP. WELL ON A VAC. RD DSM LUBRICATOR. REMOVE EQUIPMENT FROM RIG FLOOR. 10:45 - 13:00 2.25 KILLW P WEXIT HOLD PJSM TO DISCUSS PUMP RATES AND PRESSURES. BULLHEAD 340 BBLS 2%KCL DOWN TBG AT 4.5 BPM. MAX PRESSURE NOTED WAS 1145 PSI IA AND OA UNCHANGED. WELL TAKING 10-12 BPH FLUID. 13:00 - 16:45 3.75 STWHIP P WEXIT MU INTEQ BHA AND BTT 4.5"MONOBORE WHIPSTOCK. MONITOR AND FILL WELL DURING BHA MU. FILL COIL.TEST COIL CONNECTOR AND E-HEAD. TEST CHECK VALVES. MU INTEQ TOOLS. STAB COIL. TEST TOOLS. GET ON WELL. 16:45 - 22:30 5.75 STWHIP P WEXIT OPEN EDC. RUN IN HOLE TROUBLE SHOOTING PILOT PERCENTAGE. REPAIRED LOOSE WIRE. RIH AT 50'MIN. REPAIR CENTRIFUGAL PUMP. HOLD PRE-SPUD WITH NEW CREW.HOLD RIG EVAC DRILL WITH NEW CREW. LOSS RATE OF—15 BPH. TIE IN AT-14' 22:30 - 23:00 0.50 STWHIP P WEXIT RIH WITH WHIPSTOCK TO 1495'P/U HOLE TO SET BOTTOM OF WHIPSTOCK AT 10,484.44' AND ORIENT TO 0'TFO.CLOSE EDC. BRING PRESSURE UP AND SEEN SHEAR AT 3100 PSI. RIH AND STACK 6K DOWN ON WHIPSTOCK TO CONFIRM. SET TOP OF WHIPSTOCK AT 10472'. 23:00 - 00:00 1.00 STWHIP P WEXIT POOH FOR MILLING BHA. LOSS RATE OF 12 BPH 12/6/2011 00:00 - 01:30 1.50 STWHIP P WEXIT POOH FOR MILLING BHA. LOSS RATE OF 24 BPH MONITOR WELL AT BHA.VAC 00:00 - STWHIP P WEXIT POOH OPEN EDC CIRCULATE @ MAX RATE OFBELOW 3800PS1 01:30 - 03:30 2.00 STWHIP P WEXIT RACK BACK INJECTOR L/D BHA M/U MILLING BHA STAB INJECTOR AND TEST. 03:30 - 06:15 2.75 STWHIP P WEXIT RIH WITH MILLING BHA. STOP AND BLOW OUT MICRO MOTION. RIH AT 90 FPM WITH 1.41 PUMP RATE AND 414 PSI WITH EDC OPEN. LOSING 24 BPH. TIE IN AT-14.5'CORRECTION FACTOR. Printed 12/27/2011 12:41:22PM forth America -ALASKA BP Page 4 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C:(1,836,613.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Firs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:15 - 09:00 2.75 STWHIP P WEXIT RIH 10465' DISPLACE WELL TO MILLING FLUID. CREW CHANGE. DISCUSS OPS AND RIG STATUS. MAKE EQUIPMENT CHECKS AND OUTSIDE ROUNDS. CONTINUE TO DISPLACE WELL TO MILLING MUD SYSTEM. 09:00 - 11:00 2.00 STWHIP P WEXIT "TAG WHIPSTOCK AT 10,474. 2318 PSI FS AT 2.81 BPM IN/2.44 BPM OUT. BEGIN TIME MILLING. 50-100 PSI MTR WORK WITH 2.5-3.0K# DHWOB TIME MILL TO MAINTAIN THESE PARAMETERS,ROUGHLY 0.1'PER 6 MINUTES. LOSSES SLOWLY IMPROVING: AT 1100 HRS: 2.8 BPM IN/2.62 BPM OUT. MILL TO 10,475.6' 11:00 - 17:30 6.50 STWHIP P WEXIT CONTINUE MILLING WINDOW. LOSS RATE @ 5-6 BPH. -TIME MILLING @ 10,480.1',WOB 1620 LBS. -2.8 BPM @ 2245 PSI FREE SPIN,255 PSI MOTOR WORK. 17:30 - 22:45 5.25 STWHIP P WEXIT CONTINUE MILLING WINDOW. -LOSS RATE @ 5-6 BPH. -TIME MILLING @ 10,481.',WOB 1620 LBS. -2.8 BPM @ 2245 PSI FREE SPIN,322 PSI MOTOR WORK. -TIME MILLING @ 10,483.8.',WOB 0.81k LBS. -2.8 BPM @ 2245 PSI FREE SPIN,370 PSI MOTOR WORK. -TOW AT 10474',BOW AT 10483' -DRILL 10'FORMATION TO 10494'. 22:45 - 00:00 1.25 STWHIP P WEXIT BACK REAM WINDOW. 2.80 BPM @ 2520 PSI.MUD WT IN AT 8.58 PPG WOB AT 0.25K ECD OF 9.69 PPG WITH 378 BBLS IN PITS. BACK REAM WINDOW 3 TIMES. DRY DRIFT WINDOW. 12/7/2011 00:00 - 03:00 3.00 STWHIP P • WEXIT POH FOR BUILD BHA. MONITOR WELL. POOH TO BHA. 03:00 - 04:45 1.75 STWHIP P WEXIT L/D MILLING BHA MILL IN NEW CONDITION 2.79"NO-GO M/U BUILD BHA. 04:45 - 06:45 2.00 DRILL P PROD1 RIH WITH BUILD BHA. 06:45 - 07:00 0.25 DRILL P PROD1 LOG TIE IN W/GAMMA -15'CORRECTION. 07:00 - 07:15 0.25 DRILL P PROD1 ACQUIRE SLOW PUMP RATES AND CONTINUE IN HOLE TO BOTTOM. -PUMP 1: .5 BPM @ 890 PSI,1 BPM @ 1190 PSI, 2.8 BPM @ 2476 PSI. -PUMP 2: .5 BPM @ 894 PSI,1 BPM @ 1197 PSI,2.8 BPM @ 2480 PSI. 07:15 - 08:00 0.75 DRILL P PROD1 COMMENCE DRILLING BUILD SECTION 10,494'. -2460 PSI FREE SPIN PRESSURE @ 2.72 BPM -WOB 1.5K, 200 PSI MOTOR WORK.STALL @ 10,520' -ROP 31 FPH. 1 -3 BPH LOSS RATE. Printed 12/27/2011 12:41:22PM Worth America -ALASKA- BP Page 5 of 10 Operation Summary Report Common Well Name:W-21 1AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C: (1,836,613.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:00 - 12:45 4.75 DRILL P PROD1 CONTINUE DRILLING BUILD SECTION. ROP AVERAGING 25 FPH. DRILL TO 10,572' 12:45 - 15:00 2.25 DRILL N DPRB PROD1 EXCESSIVE MOTOR PRESSURE CAME BACK, 400 PSI OVER NORMAL. -HAVING TROUBLE MAKING HOLE,SEEING CHERT IN SAMPLES. -TURN TF BACK AND FORTH, INCREASE PUMP RATE. -CONSULT WITH TOWN ENGINEER,OPT TO POOH,CHECK BIT&MOTOR. 15:00 - 17:45 2.75 DRILL N DPRB PROD1 PULL THROUGH WINDOW,CONDUCT PUMPS OFF FLOW CHECK. -OPEN EDC AND PUMP MAX RATE W/POOH. -POH TO BHA AND MONITOR WELL. 17:45 - 19:30 1.75 DRILL N DPRB PROD1 CREW CHANGE HOLD PJSM FOR UD BHA DISCUSSING NON SHEARABLES. L/D BHA INSPECT BIT AND MOTOR. BIT GRADE OUT OF HOLE IS 1-1-BU-N-X-I-PN-PR. NOTHING SEEN WRONG WITH MOTOR. BIT WAS BALLED UP AND HAD 2 PLUGGED JETS EXPLAINING PRESSURE CHANGES. M/U BHA CHANGING THE BIT TO HYC SRX36 11M. DISCUSSED WITH TOWN ODE AND MUD ENGINEER.ADDING SCREEN KLEEN AT 1/2% TO HELP WITH BIT BALLING. STAB INJECTOR AND TEST QTS. 19:30 - 21:30 2.00 DRILL N DPRB PROD1 RIH TO 10180' PUMPS AT.36 BPM WITH 600 PSI 21:30 - 00:00 2.50 DRILL P PROD1 LOG DOWN TO WINDOW FROM 10,180' CORRECT BY-14.5' RIH AND TAG AT 10581' 12/8/2011 00:00 - 05:00 5.00 DRILL P PROD1 COMMENCE DRILLING BUILD SECTION @ 10,581'. -2760 PSI FREE SPIN PRESSURE @ 2.70 BPM -WOB 3.55K, 200 PSI MOTOR WORK. -ROP 7.7 FPH. NO LOSSES. -PVT OF 321 ON BOTTOM. -SPR FOR#1=1.0 BPM @ 1340 PSI,0.5 BPM @ 1100 PSI,#2=1.0 BPM @ 1325 PSI,0.5 BPM @ 1105 PSI. -AT 10611'AT 0300 HRS -WOB AT 4.08K,150 PSI MOTOR WORK -ROP OF 4.2 FPH -PVT OF 317 BBLS. 0430 HRS-10600'SAMPLE IS 100%CLAY. DEPTH OF 10614'WOB OF 3.81 K WITH 155 PSI OF MOTOR WORK,ROP OF 2 FPH. INCREASE SCREEN KLEEN TO 1%IN MUD. 05:00 - 07:15 2.25 DRILL P PROD1 CONTINUE TO DRILL BUILD. -TF 90R, ROP 15-20 FPH,WOB,2-3K. -50-150 PSI MOTOR WORK. 07:15 - 07:30 0.25 DRILL P PROD1 ACQUIRE SLOW PUMP RATES. -PUMP 1: .5 BPM @1100PSI,1 BPM @1340 PSI. -PUMP 2: .5 BPM @ 1105 PSI,1 BPM @ 1325 PSI. 107:30 - 11:15 3.75 DRILL P PROD1 DRILL AHEAD IN BUILD SECTION,45P SAND. -ROP 25-50 FPH. 150 PSI MOTOR WORK. -DRILL TO 10,750'. Printed 12/27/2011 12:41:22PM forth America-ALASKA- BP Page 6 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C: (1,836,613.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor:NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 11:15 - 11:45 0.50 DRILL P PROD1 WIPER TRIP TO WINDOW. 11:45 - 14:45 3.00 DRILL P PROD1 DRILL AHEAD IN BUILD SECTION. -ROP 25-70 FPH,125-250 PSI MOTOR WORK. 1.5-2.5K WOB, LAND BUILD @ 10,850'. 14:45 - 15:00 0.25 DRILL P PROD1 10 BBLS LOW VIS SWEEP OUT @ BIT,SWEEP CUTTINGS TO 4 1/2"TBG. 15:00 - 20:15 5.25 DRILL P PROD1 CONDUCT 5 MINUTE FLOW CHECK,(PUMPS OFF), @ 10,840'. -MOVE PIPE SLOWLY UP HOLE WHILE FLOW CHECKING. -WELLBORE STABLE,POOH. -CONDUCT 5 MIN PUMPS OFF FLOW CHECK @ 10,460'. -WELL STABLE,CONTINUE OUT OF HOLE. -MONITOR WELL AT BHA. HOLD PJSM FOR LID BHA WHILE POOH. -RACK BACK INJECTOR. 20:15 - 22:00 1.75 DRILL P PROD1 UD BUILD BHA BIT GRADE OF 2-1-CT-N-X-I-NO-BHA BIT HAD NO NOTED CLAY BALLING. P/U LATERAL BHA. M/U INJECTOR AND TEST QTS. 22:00 - 00:00 2.00 DRILL P PROD1 RIH WITH LATERAL BHA. HOLD KICK WHILE TRIPPING DRILL. GOOD RESPONSE.NO ANNOUNCEMENT WAS MADE OVER THE HARMONY WAS CAPTURED IN AAR. 12/9/2011 00:00 - 01:30 1.50 DRILL P PROD1 RIH WITH LATERAL BHA -TIE IN WITH A-14.5' -SPRS OF#1=0.5 BPM @ 1100 PSI,1.0 BPM @ 1469 PSI.#2=0.5 BPM @ 1117 PSI,1.0 BPM @ 1435 PSI. -RIH AND TAG UP HIGH AT 10829'WORKING WASHING TO BOTTOM. 01:30 - 03:30 2.00 DRILL P PROD1 DRILL AHEAD FROM 10850' -PVT OF 281 BBLS ON BOTTOM. -PUMP RATE OF 3.1 BPM @ 3230 PSI FREE-SPIN. -ON BOTTOM 3.1 BPM @ 3425 PSI 195 PSI MOTOR WORK. -WOB OF 0.67K WITH ROP OF 61 FPH. -0300 HRS-DEPTH OF 10957',385 PSI MOTOR WORK @ 3.1 BPM -ECD OF 10.05 PPG,WOB OF 2.37K, ROP OF 101 FPH. -DRILL AHEAD TO 11000' 03:30 - 05:30 2.00 DRILL P PROD1 WIPER TRIP TO WINDOW. MADD PASS BUILD INTERVAL FOR RES. 05:30 - 06:15 0.75 DRILL P PROD1 DRILL AHEAD FROM 11,000'-11,065'. -PVT OF 273 BBLS -PUMP RATE OF 3.10 BPM @ 3512 PSI FOR 282 PSI MOTOR WORK. -WOB OF 1.27K AT 104 FPH ROP, ECD OF 10.05 PPG. Printed 12/27/2011 12:41:22PM *North America -ALASKA- BP Page 7 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C: (1,836,613.00) Project:Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI: 500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 06:15 - 07:00 0.75 DRILL P PROD1 OBSERVE MOTOR WORK PRESSURE DECREASE. -APPEARS TO BE WEIGHT TRANSFER ISSUE. -PICK UP OFF BOTTOM,OPT TO GET SLOW PUMP RATES. -WHILE PICKING UP,OBSERVE PUMP PRESSURE INCREASE. SLOW DOWN PUMP,NOW 2 BPM/3200 PSI. -THINKING IT MAY BE THE BIT,HEAD BACK DOWN TO CLEAR IT. -10'OFF BOTTOM OBSERVE PRESSURE SPIKE,PUMP TRIPPED OUT. -PRESSURE LOCKED IN COIL,BLEED OFF COIL PRESSURE. -ATTEMPT TO BREAK CIRCULATION,COIL PRESSURES UP,PLUGGED SOLID. -BORE PRESSURE SENSOR READING 8158 PSI. 07:00 - 07:45 0.75 DRILL N DFAL 11,065.00 PROD1 POOH TO WINDOW,MAKE CALLS TO SUPERINTENDANT AND TOWN. -FILLING HOLE DOWN KILL LINE,HOLDING 100 PSI BACK PRESSURE ON CHOKE TO ENSURE NO POSSIBILITY OF SWABBING IN WELL. -PULL TO 10,460',CONDUCT PUMPS OFF FLOW CHECK. -WELL STABLE,TAKING RIGHT AMOUNT OF FLUID. -ATTEMPT TO BREAK CIRCULATION THRU COIL, NO GOOD. 07:45 - 08:30 0.75 DRILL N DFAL 11,065.00 PROD1 CONTINUE TO POOH. 60 FPM. -OBSERVE(1)OVERPULL,(10K)@ 9500'. 08:30 - 08:45 0.25 DRILL N DFAL 11,065.00 PROD1 ATTEMPT TO OPEN EDC,GOT 3.13%AND STATUS 4. -EDC NOT OPENING. 08:45 - 10:45 2.00 DRILL N DFAL 11,065.00 PROD1 CONTINUE TO POOH,60 FPM. -CONTINUE TO FILL HOLE THRU KILL LINE, HOLDING 100 PSI BACK PRESSURE. 10:45 - 11:30 0.75 DRILL N DFAL 11,065.00 PROD1 HAD TO STOP AND FIX CORNER ON WRAPS ON REEL. -WHILE DOING THIS,OBSERVE PRESSURE EQUALIZE. -BACK SIDE AND BORE PRESSURE SENSOR NOW READING THE SAME. -ATTEMPT TO OPEN EDC, NOT WORKING, MAY HAVE BEEN DAMAGED ON 1ST ATTEMPT. 11:30 - 12:00 0.50 DRILL N DFAL 11,065.00 PROD1 POOH TO SURFACE,FLOW CHECK,WELL STABLE. 12:00 - 12:15 0.25 DRILL N DFAL 11,065.00 PROD1 PRE JOB SAFETY MEETING ON LAYING DOWN BHA. -EMPHASIS ON POSSIBLE TRAPPED PRESSURE. -EMPHASIS ON SITUATIONAL AWARENESS AND STOPPING JOB IF ANYTHING LOOKS OUT OF THE ORDINARY.USE OF FACE SHIELDS. Printed 12/27/2011 12:41:22PM forth America -ALASKA- BP Page 8 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C:(1,836,613.00) Project:Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor:NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12:15 - 13:30 1.25 DRILL N DFAL 11,065.00 PROD1 BREAK OFF, LAY DOWN BHA. -OPEN BLEED SCREW ABOVE FLOAT SUB, NO PRESSURE. -PICK UP TO BIT,OBSERVE MOTOR UNSCREWED. CHECK FOR PRESSURE,NO PRESSURE. 13:30 - 14:45 1.25 DRILL N DFAL 11,065.00 PROD1 PJSM. CUT 100'OF COIL. 14:45 - 17:00 2.25 DRILL N DFAL 11,065.00 PROD1 M/U COIL HEAD AND PULL TEST. INSTALL UQC,MEG TEST TO 1400 OHMS,52 OHMS CIRCULATE FLUID, PRESSURE TEST CC STAB ON WELL PRESSURE TEST UQC CHECKS AND QTS SUB. 17:00 - 20:00 3.00 DRILL N DFAL 11,065.00 PROD1 M/U BHA. CREW CHANGE WITH PJSM AND WALK AROUNDS. STAB ONTO WELL AND TEST TO 250 PSI/ 3500 PSI. 20:00 - 00:00 4.00 DRILL N DFAL 11,065.00 PROD1 RIH WITH LATERAL BHA -TIE IN AT-13.5' -22:15 HRS-RIH AND TAG AT 10,234'WITH 7K,PU AND RIH TAGGING AGAIN WITH 5K. -CLOSE EDC TO ROTATE BIT SLOWLY AND WORK BY OBSTACLE AT 0.6 BPM TAG UP AT 10241'P/U INCREASE PUMP RATE TO 1 BPM RIH WITH NO ISSUE TO WINDOW AT 10474'. P/U AND WIPE SAME AREA. -DISCUSS WITH ODE. -WHEN ABOVE WINDOW OPEN EDC AND BEGIN PUMPING AT MAX RATE AND POOH TO 7500'TO ENSURE TUBING IS CLEAN- PAGE 22 OF WELL PLAN. 12/10/2011 00:00 - 02:00 2.00 DRILL N DFAL 11,065.00 PROD1 CONTINUE TO POH TO 7500'FOR HOLE CLEANING. -SEEING A 100%INCREASE IN CUTTINGS AT TIMES ONLY AFTER PULLING UP TO 7500' MD.CUTTINGS ARE DETERMINED TO BE THE 45N SHALES BY GEO.SAVING SAMPLES. 00:45 HRS-RIH FROM 7500'WITH EDC OPEN AND FULL CIRCULATION. RIH TO 11,061'WITH NO PROBLEM AND TAG. -OBTAIN SPRS:#1 @ 0.5 BPM=1095 PSI 1.BPM=1421#2@ 0.5BPM=1090 PSI 1.BPM=1415. 02:00 - 03:30 1.50 DRILL P PROD1 DRILLING AHEAD. -PUMP RATE OF 2.96 BPM AT 2900 PSI FREE SPIN. -RATE OF 2.96 BPM AT 3102 PSI 200 PSI MOTOR WORK. -PVT OF 242 BBLS,WOB OF 1.95K,ECD OF 10.05 PPG, ROP OF 103 FPH. -DRILLED TO 11200'. 03:30 - 05:00 1.50 DRILL P PROD1 WIPER TRIP TO WINDOW PULLED TIGHT BETWEEN 10650'AND 10560' WORK THROUGH TIGHT SPOT. Printed 12/27/2011 12:41:22PM forth America ALASKA°- BP Page 9 of 10 Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00)0(D-C: (1,836,613.00) Project:Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 05:00 - 07:00 2.00 DRILL P PROD1 DRILLING AHEAD. -PUMP RATE OF 2.96 BPM AT 2900 PSI FREE SPIN. -RATE OF 2.99 BPM AT 3320 PSI 420 PSI MOTOR WORK. -PVT OF 237 BBLS,WOB OF 1.29K, ECD OF 10.05 PPG, ROP OF 94 FPH. -DRILL AHEAD TO 11,355'. 07:00 - 08:15 1.25 DRILL P PROD1 WIPER TRIP TO WINDOW. 08:15 - 10:00 1.75 DRILL P PROD1 CONTINUE TO DRILL AHEAD IN LATERAL SECTION. ACQUIRE SLOW PUMP RATES,BOTH PUMPS. -DRILL AHEAD F/11,390'-11,500'. -2-3K WOB,300-500 PSI MOTOR WORK. - AVERAGING 100 FPH ROP. 10:00 - 12:30 2.50 DRILL P PROD1 WIPER TRIP TO 7500'. -OPEN EDC! 10,460', RIGHT ABOVE WINDOW. -SEE SIGNIFICANT SOLIDS BACK OVER SHAKER. 12:30 - 13:00 0.50 DRILL P PROD1 LOG TIE IN W/GAMMA,ADD 10' CORRECTION. -CLOSE EDC AND RUN THROUGH WINDOW. 13:00 - 14:00 1.00 DRILL P PROD1 CONTINUE IN HOLE TO 11,500'. 14:00 - 15:30 1.50 DRILL P PROD1 -DRILL AHEAD TO 11,665',AVG ROP=70- 100 FPH. -SEEING WT TRANSFER ISSUES,MUD IS GETTING OLD. -AVG MOTOR WORK=250 PSI,40K UP WT, 19K DOWN WT. -PUMPED 10 BBLS LO VIS/30 BBLS HI VIS SWEEP. -SWEEP CLEARED BIT PRIOR TO WIPER TRIP. 15:30 - 18:00 2.50 DRILL P PROD1 WIPER TRIP TO 10,500'. 18:00 - 21:00 3.00 DRILL P PROD1 DRILL AHEAD TO 11,800' -2.84 BPM AT 3105 PSI,WOB OF 1.74K, ECD OF 10.05 PPG, ROP OF 84 FPH -PVT OF 237 BBLS. -PUMP 40 BBLS SWEEP TO HELP WITH WT TRANSFER. -ORDER OUT NEW MUD TO DISPLACE. 21:00 - 00:00 3.00 DRILL P PROD1 WIPER TRIP TO 7,500'. POOH TO WINDOW WAS CLEAN. OPEN EDC AND INCREASE TO PUMP RATE TO 3.3 BPM AND 2871 PSI. _ POOH TO 7500'TO CLEAN LINER. 12/11/2011 00:00 - 02:00 2.00 DRILL P PROD1 WIPER TRIP TO 7,500'. POOH TO WINDOW WAS CLEAN. OPEN EDC AND INCREASE TO PUMP RATE TO 3.3 BPM AND 2871 PSI. POOH TO 7500'TO CLEAN LINER. 100% INCREASE IN CUTTINGS AT SHAKER. RIH AND TIE IN AT+7'. / RIH TO TD AND DRILL AHEf5D. 02:00 - 03:45 1.75 DRILL P PROD1 DRILL AHEAD TO 11895' //' ��Y -3.04 BPM AT 3051 PSI,WOB OF 2.34K, ECD OF 10.05 PPG, ROP OF 75 FPH -DISPLACE TO NEW MUD. Printed 12/27/2011 12:41:22PM North America-ALASKA-BP Page 10 of 10 • Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 11/30/2011 End Date: X3-00XXD-C:(1,836,613.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised©82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 03:45 - 06:00 2.25 DRILL P PROD1 WIPER TRIP BACK TO WINDOW TIE IN+1.5' CORRECTION. RIH TO TD.TAG UP @ 11,895'CORRECTED DEPTH. 06:00 - 06:30 0.50 DRILL P PROD1 PJSM. PUMP LINER PILL TO BIT. 06:30 - 06:45 0.25 DRILL P PROD1 PJSM. FLOW CHECK WELL. 10'OFF BOTTOM. -PICK UP 2'/MIN W/PUMPS OFF FOR 5 MINUTES. WELL STABLE. 06:45 - 10:30 3.75 DRILL P PROD1 LAYIN LINER PII I W/POOH TO WINDOW -PAINT EOP FLAG @ 10,375',(BIT DEPTH 10,455'). -PAINT EOP FLAG @ 8954',(BIT DEPTH 9034'). -WINDOW FLAG SHOULD COME UP @ 10,374'. -TD FLAG SHOULD COME UP @ 11,795'. -FLOW CHECK @ WINDOW,OPEN EDC. -POOH,FLOW CHECK AT SURFACE,WELL STABLE. 10:30 - 11:15 0.75 DRILL P PROD1 PJSM,STAND BACK INJECTOR,LID BHA. 11:15 - 11:30 0.25 DRILL P PROD1,, FUNCTION TEST BOPE, BOTH STATIONS USED. Printed 12/27/2011 12:41:22PM Page1 of 1 Common Well Name:W-21 AFE No Event Type:COM-ONSHORE(CON) Start Date: 12/9/2011 End Date: X3-00XXD-C:(321,347.00) Project:Prudhoe Bay Site:PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12/11/2011 11:30 - 15:45 4.25 CASING P PROD1 PJSM, M/U BAKER JEWELRY. -P/U(44)JTS 2 7/8"STL SLOTTED LINER. -TORQUE CONNECTIONS TO 800-1000 FT/LBS. 15:45 - 16:45 1.00 CASING P PROD1 MAKE UP LINER RUNNING TOOLS. -P/U INJECTOR, M/U TO LINER.STAB ON TO WELL. 16:45 - 20:45 4.00 CASING P PROD1 SET DEPTHS,RIH W/2 7/8"SLOTTED LINER ON 2 3/8"COIL. REACH 1ST FLAG AT 10395.5'AT A-21.5' CORRECTION. CONTINUE IN HOLE SEE FLAG AT 11797'RIH TO 11888'AND TAG BOTTOM. P/U AND RECONFIRM TAG 2 TIMES.STACK 10K WOB. BRING PUMPS ON TO 3000 PSI. P/U RELEASING LINER. POOH TO WINDOW AND MONITOR WELL. STATIC. 20:45 - 00:00 3.25 CASING P _ PROD1 POOH FOR BUILD BHA. MONITOR WELL. R/B INJECTOR. Printed 12/27/2011 12:41:41PM North America -ALASKA- BP Page 1 of( Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 12/11/2011 End Date: X3-00XXD-C: (821,992.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12/12/2011 00:00 - 01:45 1.75 STKOH P PROD1 M/U BUILD BHA. STAB COIL. TEST QTS TO 250 PSI LOW AND 3500 PSI HIGH GOOD TEST. 01:45 - 03:00 1.25 STKOH P PROD1 RIH WITH BUILD BHA TO DRILL W21AL1-L1 BUILD SECTION. RIH TO 10081'AND LOST POWER TO TOOLS. 03:00 - 03:30 0.50 STKOH P PROD1 DIAGNOSE LOST POWER TO TOOLS. ALL SURFACE CONNECTIONS AND PROBLEM ELIMINATED. MONITOR WELL STATIC 03:30 - 06:00 2.50 STKOH N DFAL PROD1 POOH MONITOR WELL STATIC. RACK BACK INJECTOR. 06:00 - 06:30 0.50 STKOH N DFAL PROD1 MEG UQC, BAD TEST.CREW CHANGE. 06:30 - 07:00 0.50 STKOH N DFAL PROD1 PULL UQC SLEEVE,SHEAR SLEEVE WAS PULLED OUT OF ANCHOR. 07:00 - 07:30 0.50 STKOH N DFAL PROD1 FINISH LAYING DOWN BHA,PREP TO DO SLACK MANAGEMENT. 07:30 - 08:30 1.00 STKOH N DFAL PROD1 PJSM. PUMP SLACK BACK INTO REEL. 08:30 - 09:00 0.50 STKOH N DFAL PROD1 PJSM.CUT 50'OF COIL. 09:00 - 09:45 0.75 STKOH N DFAL PROD1 PJSM, REHEAD COIL AND PULL TEST @ 40K, OK. 09:45 - 10:30 0.75 STKOH N DFAL PROD1 PUMP SLACK FORWARD IN TO STINGER. 10:30 - 11:00 0.50 ` STKOH N DFAL PROD1 PJSM.REREAD UQC,MEG LINE,GOOD TEST. 11:00 - 11:30 0.50 STKOH N DFAL PROD1 PRESSURE TEST CC"O"RINGS,OK. -PRESSURE TEST UQC CHECKS AND QTS. -300/3500 PSI 5 MIN EACH,GOOD. 11:30 - 12:30 1.00 STKOH - N DFAL PROD1 PJSM. P/U,M/U BUILD SECTION BHA. 12:30 - 13:00 0.50 STKOH N DFAL PROD1 PUMP COIL VOLUME FORWARD THROUGH OPEN EDC. 13:00 - 15:30 2.50 STKOH N DFAL PROD1 RIH PUMPING MAX RATE. 15:30 - 15:45 0.25 STKOH P PROD1 LOG TIE IN, SUBTRACT 14'CORRECTION. 15:45 - 23:30 7.75 STKOH P PROD1 TAG UP PUMPING MINIMUM RATE @ 10,507'. -PICK UP AND BRING ON PUMP,2.7 BPM/ 2700 PSI. -TAG AND COMMENCE TIME MILLING OFF OF ALUMINUM BILLET @ 10,506.3'. 500'' -18:30 HRS-10508.1'AT 2.78 BPM WITH 2728 PSI. �11-4)5 b -20:00 HRS-10521'AT 2.78 BPM WITH 2970 PSI, ROP OF 52 FPH,WOB OF 1.91K -DRILLED TO 10653' 23:30 - 00:00 0.50 STKOH P PROD1 WIPER TO WINDOW 12/13/2011 00:00 - 02:00 2.00 STKOH P PROD1 DRILLING AHEAD TO 10803' -2.8 BPM AT 3025 PSI,WITH WOB AT 1.97K, ROP OF 89 FPH. -PVT OF 407 BBLS. 02:00 - 02:45 0.75 STKOH P PROD1 WIPER TRIP TO WINDOW. Printed 12/27/2011 12:41:59PM Vorth America -ALASKA- BP Page 2 of , • Operation Summary Report Common Well Name:W-21 AFE No Event Type: RE-ENTER-ONSHORE(RON) Start Date: 12/11/2011 End Date: X3-00XXD-C: (821,992.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 02:45 - 04:00 1.25 STKOH P PROD1 DRILLING AHEAD TO 10863' -2.8 BPM AT 2937 PSI,WITH WOB AT 2.22K, ROP OF 77 FPH. -PVT OF 406 BBLS. -FLOW CHECK WELL ON BOTTOM FOR 5 MIN. 04:00 - 07:30 3.50 STKOH P PROD1 POOH,FLOW CHECK @ WINDOW,WELL STABLE. -CONTINUE TO POOH W/BUILD SECTION BHA. -FLOW CHECK AT SURFACE,ALL FLOW CHECKS(5)MINUTES,WELL STABLE. 07:30 - 08:30 1.00 STKOH P PROD1 PJSM. BREAK OFF WELL,STAND BACK INJECTOR. -L/D BUILD SECTION BHA. -BIT GRADED 3 2 BT AXI PJ TD 08:30 - 09:30 1.00 STKOH P PROD1 PJSM. PICK UP LATERAL SECTION BHA. -2 7/8'MOTOR, HUGHES BI CENTER BIT. -WELL STABLE, FLUID LEVEL IN WELL BORE STATIC. -STAB ON TO WELL W/INJECTOR. 09:30 - 12:15 2.75 STKOH P PROD1 RIH W/LATERAL SECTION BHA. -OPEN EDC W/RIH,TIE IN W/GAMMA,MINUS 15'CORRECTION. 12:15 - 12:45 0.50 STKOH P PROD1 CLOSE EDC,RIH PAST WINDOW AND BILLET, CLEAN! -TAG UP @ 10,863'. -ACQUIRE SLOW PUMP RATES -PUMP 1: .5 BPM @1354PSI,1 BPM @1597 PSI. PUMP 2: .5 BPM @ 1348 PSI,1 BPM @ 1590 PSI. 12:45 - 14:30 1.75 STKOH P PROD1 COMMENCE DRILLING LATERAL SECTION F/ 10,863'. -2.71 BPM @ 2791 PSI FREE SPIN.250 PSI MOTOR WORK. -1 -4K WOB,AVG ROP=50 FPH. -DRILL TO 10,938'. 14:30 - 14:45 0.25 STKOH P PROD1 BHA WIPER TRIP. 14:45 - 15:45 1.00 STKOH P PROD1 DRILL AHEAD F/10,938'-11,000'. -NO FLUID BEING LOST TO FORMATION. -ROP 50-80FPH,2-3KWOB,200-350 PSI MOTOR WORK. 15:45 - 17:30 1.75 STKOH P PROD1 MADD PASS F/11,000'-10,510'@ 200 FPH. 17:30 - 18:00 0.50 STKOH P PROD1 RBIH. 18:00 - 00:00 6.00 STKOH P PROD1—mit I AHFAD FROM 11.000' 2.8 BPM, F/S 2900 PSI.200 PSI MOTOR WORK. DHWOB=2.7K. ROP=30/40 FPH. ECD=10.19 PPG. I/A=695 PSI.O/A=665 PSI.WHP=67 PSI. PVT=373 BBLS.AP=4763 PSI. 1/1 RETURNS. DRILLING TO 11,125' Printed 12/27/2011 12:41:59PM 11114Jzot1 R;9c 3 of From-To Hrs Phase Task .ctivity Code NPT !peration Op.Depth(ft) (hr) 00:00- 00:30 0.50 PROD1 STKOH DRLDIR P DRILL AHEAD FROM 11,125' 11,150.0 2.8 BPM,F/S 2900 PSI.200 PSI MOTOR WORK. DHWOB=3K.ROP=60 FPH.ECD=10.23 PPG. I/A=723 PSI.O/A=685 PSI.WHP=62 PSI. PVT=370 BBLS.AP=4702 PSI. 1/1 RETURNS. DRILL TO 11,150' 00:30- 03:15 2.75 PROD1 STKOH WIPER P WIPER TRIP FROM 11,150" 11,150.0 POH 17 FPM.CLEAN. PUMP MIN RATE PAST BILLET. POH TO 10,465',OPEN EDC.PUMP 3.4 BPM. POH TO 7,500' RIH TO 10,120'TIE IN.+3'CORRECTION. RIH TO 10,460'CLO-SE EDC. 03:15- 04:00 0.75 PROD1 STKOH WIPER P RIH,SOME MOTOR WORK @ 11,000'. 11,150.0 RECORD SPR 1 AND2 MP. HOLE TOOK 7 BBLS ON WIPER TRIP. 04:00- 04:30 0.50 PROD1 STKOH DRLDIR P DRILLING AHEAD FROM 11,150' 11,187.0 2.78 BPM,F/S 2825 PSI.250 PSI MOTOR WORK. DHWOB=2.5K.ROP=60 FPH.ECD= 10.19 PPG. I/A=723 PSI.O/A=685 PSI.WHP=65 PSI. PVT=362 BBLS.AP=4687 PSI. DRILLING TO 11,187' 04:30- 04:55 0.42 PROD1 STKOH RIGREP N RREP #2 GENERATOR WENT DOWN DUE TO LOW VOLTAGE 11,187.0 INDICATION. RIG BLACKED OUT.START GENERATORS 1 AND 3. ENGAGE SCR EQUIPMENT.P/U OFF BOTTOM. CHECK EQUIPMENT.CIRCULATE 2.7 BPM. MAKE SHORT WIPER TRIP- TO ENSURE HOLE CLEAN. CONTINUE DRILLING.RIG ELECTRICIAN CALLED OUT TO INSPECT #2 GENERATOR. 04:55- 07:00 2.08 PROD1 STKOH DRLDIR P CONTINUE DRILLING FROM 11,187' 11,300.0 P/U WT=40K SLACK OFF WT=21 K DRILLING TO 11,300 DHWOB=2.5K ROP=73FPH.PUMP=2.72 3110 PSI=ON BTM 2795 PSI=OFF BTM DRILLING TO 11,300 07:00- 08:15 1.25 PROD1 STKOH WIPER P WIPER TRIP TO BILLET 11,300.0 P/U WT=41K PUMP=2.71 BPM @ 2775 PSI,OFF BTM 08:15- 09:30 1.25 PROD1 STKOH DRLDIR P DRILLING AHEAD 11,413.0 -ROP=80 FPH DHWOB=2.6K PUMP=2.72 BPM 3150 PSI=ON BTM 2800=OFF BTM • 09:30- 09:45 0.25 PROD1 STKOH WIPER P BHA WIPER TRIP 11,413.0 09:45- 10:00 0.25 PROD1 STKOH DRLDIR P DRILLING AHEAD 11,452.0 -ROP=98 FPH DHWOB=2K PUMP=2.7 BPM 3083 PSI=ON BTM 2794=OFF BTM 10:00- 12:30 2.50 PROD1 STKOH WIPER P WIPER TRIPTO 7500FT 11,452.0 -P/U WT=41K PUMP=2.71 BPM @ 2787 PSI=OFF BTM -OPEN EDC ABOVE WINDOW, PUMPING MAX RATE,3.8 BPM. 12:30- 13:30 1.00 PROD1 STKOH WIPER P SEEING GOODLY AMOUNT OF SOLIDS BACK OVER SHAKER. 11,452.0 13:30- 14:30 1.00 PROD1 STKOH RIH P TIE IN TO GR,+4FT CORRECTION 11,452.0 -CONTINUE RIH 22K SLACK OFF WT -CLOSE EDC,RUN THROUGH WINDOW AND PAST BILLET -CONTINUE RIH,AS PER GEO,BUILD TO 95 DEGREES AND HOLD TO TD. 14:30- 15:15 0.75 PROD1 STKOH DRL P DRILL AHEAD F/11,452'. 11,496.0 -200-300 PSI MOTOR WORK,2.5K WOB. -2.7 BPM @ 2900 PSI OFF BOTTOM. 15:15- 15:30 0.25 PROD1 STKOH WIPER P SHORT TRIP,(BHA WIPER). 11,496.0 15:30- 17:45 2.25 PROD1 STKOH DRLDIR P DRILL AHEAD F/11,496'.ROP AVG=65-70 FPH. 11,600.0 -2900 FREESPIN @ 2.7 BPM,2-3K WOB. -100-275 PSI MOTOR WORK. DRILL TO 11,600' 17:45- 19:20 1.58 PROD1 STKOH WIPER P WIPER TRIP FROM 11,600'TO BILLET. 11,600.0 CLEAN. 19:20- 00:00 4.67 PROD1 STKOH DRLDIR P DRILL AHEAD FROM 11,600' 11,720.0 2.7 BPM,F/S 2800 PSI.350 PSI MOTOR WORK. DHWOB=3K.ROP=30 FPH.ECD=10.34 PPG. I/A=345 PSI.O/A=293 PSI.WFHP=75 PSI. PVT=308 BBLS.AP=4752 PSI. DRILL TO 11,720' Pc,.9 qac From-To Hrs Phase Task Activity Code NPT Operation Op. Depth(ft) (hr) 00:00- 02:00 2.00 PROD1 STKOH DRLDIR P DRILL AHEAD FROM 11,720' 11,750.0 2.7 BPM,F/S 2800 PSI.350 PSI MOTOR WORK. DHWOB=3K.ROP=20 FPH.ECD= 10.34 PPG. 0-1 IS 11 I/A=350 PSI.O/A=300 PSI.WHP=70 PSI. PVT=305 BBLS.AP=4755 PSI. DRILL TO TD AS PER GEO AND DD @ 11,750' RECORD SPR 1 AND 2 MP. 02:00- 05:30 3.50 PROD1 STKOH WIPER P PUMP 10 BBL HI VIS SWEEP. 11,750.0 WIPER FROM 11,750'TO 7,500' PUMP MIN RATE PAST BILLET. CLEAN. OPEN EDC AT 10,464' POH TO 7,500'PUMPING 3.6 BPM 3300 PSI. RIH TO 10,105',LOG TIE IN.+5'CORRECTION. RIH,CLOSE EDC©WINDOW. 05:30- 06:30 1.00 PROD1 STKOH WIPER P CONTINUE IN HOLE,TAG @ 11,752'CORRECTED DEPTH. 11,750.0 -FLOW CHECK WELL, 10 MINUTES,WELL STABLE. 06:30- 07:45 1.25 PROD1 STKOH POH P PJSM.POOH LAYING IN LINER PILL. 11,750.0 -ABOVE WINDOW,OPEN EDC,5 MIN FLOW CHECK,OK. 07:45- 10:15 2.50 PROD1 STKOH POH P CONTINUE OOH,PAINT FLAGS. 11,750.0 -EOP FLAGS @ 10,357'&9079'. 10:15- 10:30 0.25 PROD1 STKOH FLWCHK P AT SURFACE,CLOSE EDC,FLOW CHECK WELL,10 MINUTES, 11,750.0 WELL STABLE. 10:30- 11:00 0.50 PROD1 STKOH BHPULD P PJSM.BREAK OFF INJECTOR,L/D BHA. 11,750.0 -GRADE BIT, 1-1-PJ-N-X-I-NO-TD. 12/16/2011 6:02:30AM ` -`6'430 Qaycs oc-- M;ss+n9 :c442, dockebaSe— (ynuc. 08 cAu�+S e Pco�ech� North America -ALASKA- BP Page 1 of 6 Operation Summary Report Common Well Name:W-21 AFE No Event Type: COM-ONSHORE(CON) Start Date: 12/16/2011 End Date: X3-00XXD-C: (819,680.00) Project:Prudhoe Bay Site:PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) _ Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12/15/2011 11:00 - 13:45 2.75 CASING P RUNPRD CHANGED MADE TO LINER DEPTHS FROM TOWN. -ORDER OUT MORE SOLID JTS FROM STORES. 13:45 - 14:30 0.75 CASING P RUNPRD PJSM. LOAD AND STRAP/DRIFT TUBING. 14:30 - 18:00 3.50 CASING P RUNPRD PJSM.PICK UP LINER,MAKE UP BHI TOOLS. AS PER LINER SUMMARY. 18:00 - 18:30 0.50 CASING P RUNPRD CREW C/O, DISCUSS ONGOING RIG OPS. CHECK EQUIPMENT STATUS. 18:30 - 19:00 0.50 CASING P RUNPRD PJSM,STAB INJECTOR. ESTABLISH CIRCULATION. 19:00 - 19:30 0.50 CASING P RUNPRD TEST QTS TO 250/3500 PSI. BLOW DOWN KILL LINE. 19:30 - 22:25 2.92 CASING P RUNPRD ,RIH WITH 27/8'SLOTTED LINER ASSY' RIH 80 FPM. PUMPING.3 BPM 1100 PSI. EOP FLAG AT 9079'-21'CORRECTION. RIH TO 10,360',P/U WT=45K S/O=25K. PAST WS CLEAN.CONTINUE RIH 46 FPM. PUMPING.3 BPM 1200 PSI. TAG BOTTOM WITH LINER 11745' 22:25 - 22:40 0.25 CASING P RUNPRD STACK 10K. PUMP 2.5 BPM, P/U-10K CONFIRM LINER RELEASE.P/U 39K. TIE IN TO RA TAG AT 11,752'+7' CORRECTION. RIH TAG TOL AT 10,493',10'BELOW BOW. 22:40 - 00:00 1.33 CASING P RUNPRD P/U INTO WINDOW. PREP PITS,DISPLACE TO 2%KCL. JET WHIPSTOCK. CONTINUE TO DISPLACE MUD SYSTEM- CLEAN PITS. 12/16/2011 00:00 - 01:40 1.67 CASING`- P RUNPRD CIRCULATE AT 10,374' CONTINUE TO DISPLACE TO 2%KCL. CLEAN PITS. PVT=397 BBLS. 01:40 - 02:00 0.33 CASING P RUNPRD FLOWCHECK WELL-STATIC. RECORD SPR FOR 1 AND 2 MP. 02:00 - 04:15 2.25 CASING P RUNPRD POH WITH LINER RUNNING TOOLS. 04:15 - 04:25 0.17 CASING P RUNPRD FLOWCHECK AT SURFACE-STATIC. PJSM FOR HANDLING BHA. 04:25 - 06:00 1.58 CASING P RUNPRD SET BACK INJECTOR,UD AND INSPECT RUNNING TOOLS. M/U FISHING TOOLS.W/S HOOK,BOWEN DIRECTIONAL JARS,X/O, HOT, DGS, DPS, EDC,PC,SWP,LQC,UQC,X/O CTC.SET BHA IN HOLE. M/U INJECTOR. 06:00 - 08:30 2.50 CASING P RUNPRD RIH W/WHIPSTOCK FISHING BHA ON 2 3/8" COIL. -RUN IN SPEED=90 FPM.PUMPING.6 BPM @ 114 PSI. -RIH TO 8009'CTMD.CTK POWERED DOWN, NO COMMUNICATION W/BHI TOOLS. Printed 12/27/2011 12:42:15PM • Jorth America -ALASKA- BP Page 2 of 6 Operation Summary Report Common Well Name:W-21 I AFE No Event Type: COM-ONSHORE(CON) Start Date: 12/16/2011 End Date: X3-00XXD-C: (819,680.00) Project:Prudhoe Bay Site:PB W Pad Rig Name/No.:NORDIC 2 Spud Date/Time:3/26/1989 12.00:00AM Rig Release: Rig Contractor:NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 08:30 - 11:45 3.25 CASING N RUNPRD POOH TO CHECK TOOLS/CONNCTION. -HANG UP ON GLM @ 6939'CTM. -GO BACK DOWN, PICK UP AGAINST MANDREL SEVERAL TIMES. -34K UP WT,23K DOWN.CONSULT TOWN AND SUPERINTENDANT. -PULLED UP TO 43K,8-9K OVER, POPPED THROUGH OK. -POOH,FLOW CHECK AT SURFACE,WELL STABLE. 11:45 - 12:15 0.50 CASING N DFAL RUNPRD TAG UP,MEG TEST FAILED. -L/D BHA. 12:15 - 12:30 0.25 CASING N DFAL RUNPRD PULL UQC APART,ELINE IS PULLED OUT OF HEAD. 12:30 - 13:15 0.75 CASING N DFAL RUNPRD PJSM.PUMP SLACK BACK INTO REEL. 13:15 - 13:45 0.50 CASING N DFAL RUNPRD PJSM.CUT 201'OF COIL,FOUND ELINE. 13:45 - 14:45 1.00 CASING N DFAL RUNPRD PJSM.REHEAD COIL CONNECTOR,PULL TEST,40K, GOOD. 14:45 - 15:15 0.50 CASING N DFAL RUNPRD PJSM. REHEAD UQC,MEG TET,GOOD. 15:15 - 15:45 0.50 CASING -N DFAL RUNPRD PRESSURE TEST CC 0 RINGS,OK. 15:45 - 16:15 0.50 CASING N DFAL RUNPRD STAB ON WELL,PUMP SLACK FORWARD. 16:15 - 16:30 0.25 CASING N DFAL RUNPRD PRESSURE TEST UQC AND QTS CHECKS,250 /3500 5 MIN EACH,GOOD. 16:30 - 17:15 0.75 CASING N DFAL RUNPRD PJSM.PICK UP WHIPSTOCK FISHING BHA. M/U INJECTOR,TEST QTS.OPEN EDC. 17:15 - 17:30 0.25 CASING N DFAL RUNPRD PJSM. PRESSURE TUBING TO 400 PSI. -NO INDICATION OF COMMUNICATION WITH I/A. -ASSURANCE THAT GLM VALVE WAS NOT INADVERTANTLY PULLED. 17:30 - 18:30 1.00 CASING N DFAL RUNPRD RIH W/WHIPSTOCK FISHING BHA ON 23/8" COIL. 85 FPM. PUMPING 2.4 BPM 1600 PSI. PAST 8006'AT 18:30-BACK ON PLANNED OPERATIONS. 18:30 - 19:45 1.25 FISH P RUNPRD CONTINUE RIH-LOG TIE IN AT 10,105',-13' CORRECTION. RIH 30 FPM TO 10,417'P/U WT=46K,5/0 WT= 25K.CLOSE EDC. 19:45 - 23:40 3.92 FISH P RUNPRD ORIENT HOOK TO HIGH SIDE. PUMPING 2.6 BPM.2150 PSI. RIH 4 FPM TO 10,485' MAKING 4 PASSES ORIENTING HOOK 15 DEG EACH PASS- TO JET THE FISHING SLOT OF WHIPSTOCK. ORIENT HOOK TO ENGAGE FACE OF W/S TRAY. DROP BELOW TRAY TO 10,477', ATTEMPT TO LATCH W/S ORIENTING 15 DEG INCREMENTS- FROM 120 DEG LEFT TO 130 DEG RIGHT NUMEROUS TIMES. UNABLE TO LATCH W/S. 23:40 - 00:00 0.33 FISH P RUNPRD P/U TO CASED HOLE AND TIE IN AT 10,120' TO RE-CONFIRM DEPTH,+1'CORRECTION. Printed 12/27/2011 12:42.15PM 'forth America-ALASKA- BP Page 3 of 6 Operation Summary Report Common Well Name:W-21 AFE No Event Type:COM-ONSHORE(CON) Start Date: 12/16/2011 End Date: X3-00XXD-C:(819,680.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 12/17/2011 00:00 - 01:20 1.33 FISH P RUNPRD RIH TO 10,480'AT WHIPSTOCK TRAY. PUMP AT 3.2 BPM 3150 PSI. ORIENT 180 DEG BACK AND FORTH TO CLEAN SLOT. ATTEMPT TO LATCH W/S WITH NO SUCCESS. NOTIFY FIELD SUPERINTENDANT. DISCUSS OPTIONS TO POH FOR SHROUDED HOOK. 01:20 - 01:30 0.17 FISH P RUNPRD 10,450'FLOWCHECK WELL-STATIC. PVT=368 BBLS. 01:30 - 04:30 3.00 FISH P RUNPRD POH WITH FISHING BHA FOR SHROUDED HOOK ASSY. SLOW DOW TO 20 FPM PASSING GL MANDRELS. TAG GLM AT 5926'PULLING 6K OVERPULL. RIH 10' ORIENT 180 DEG.CONTINUE POH. 04:30 - 04:40 0.17 FISH P RUNPRD FLOWCHECK WELL-STATIC. PJSM FOR HANDLING BHA. PVT=308 BBLS. 04:40 - 05:10 0.50 FISH P RUNPRD SET BACK INJECTOR. UD AND INSPECT BHA. 05:10 - 06:15 1.08 FISH P RUNPRD PJSM. PIPE MANAGMENT FOR FISHING. R/U AND CUT 242'FT CTB. 06:15 - 06:45 0.50 FISH P RUNPRD REPAIR"O"RINGS ON INJECTOR HOSES. 06:45 - 08:00 1.25 FISH P RUNPRD PJSM.CUT 242'OF COIL. 08:00 - 08:15 0.25 FISH - P RUNPRD PJSM. INSTALL BOT COIL CONNECTOR AND PULL TEST TO 40K,OK. 08:15 - 08:30 0.25 FISH P RUNPRD REHEAD UQC AND MEG TEST,GOOD. 08:30 - 09:30 1.00 FISH P RUNPRD PJSM. PRESSURE TEST COIL CONNECTOR, 250/3500 5 MIN EACH,GOOD. 09:30 - 10:00 0.50 FISH P RUNPRD STAB ON WELL AND PRESSURE TEST QTS, 250/3500 PSI,GOOD TEST. 10:00 - 10:45 0.75 FISH P RUNPRD PJSM. P/U WHIPSTOCK FISHING BHA. -HOOK WITH SHROUD. -BOPE DRILL W/PICKING UP BHA, RESPONSE TIME 30 SECONDS TO WELL SECURE,AAR. 11:15 - 12:45 1.50 FISH P RUNPRD PJSM.OPEN EDC AND RIH. 12:45 - 13:30 0.75 FISH N DPRB RUNPRD STACK 5K ON GLM @ 6944'.PICK UP TO 9K OVER, NOT COMING FREE. -PICK UP,ORIENT FROM HS TO 270 DEGREES,TAG UP AGAIN. -ATTEMPT TO GO DOWN,ATTEMPT TO GO UP, MOVEMENT INHIBITED. -BRING ON PUMP @ 3 BPM AND ABLE TO PULL FREE W/8K OVER UP WT @ 43K. -CONSULT TOWN ENGINEER, INFORM SUPERINTENDANT OF STATUS. 13:30 - 15:30 2.00 FISH N DPRB RUNPRD POOH TO PICK UP JET BLASTER. -FLOW CHECK WELL,5 MINUTES,WELL STABLE. 15:30 - 16:00 0.50 FISH N DPRB RUNPRD FLOW CHECK WELL AT SURFACE,WELL STABLE. -PJSM. BREAK OFF,STAND BACK INJECTOR, UD WHIPSTOCK FISHING TOOL. 16:00 - 16:45 0.75 FISH N DPRB RUNPRD PJSM. PICK UP JET BLASTER BHA. -MAKE UP INJECTOR TO WELL. Printed 12/27/2011 12:42:15PM • Jorth America -ALASKA- BP Page 4 of 6 .. Operation Summary Report Common Well Name:W-21 AFE No Event Type:COM-ONSHORE(CON) Start Date. 12/16/2011 End Date X3-00XXD-C: (819,680 00) Project:Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor:NORDIC CALISTA _ UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 16:45 - 19:45 3.00 FISH N DPRB RUNPRD RIH W/JET BLASTER ASSEMBLY ON 2 3/8" COIL. 6 FPM AT GL MANDRELS, PUMPING.3 BPM 200 PSI. TAG @ 6942'AT GLM. 19:45 - 20:10 0.42 FISH N DPRB RUNPRD NOTIFY FIELD SUPERINTENDANT- DECISION MADE TO PUMP AT JET BLASTERS -MAX RATE AND TRY TO JET PAST GLM AT 30 FPH. ATTEMPT TO JET PAST GLM AT 6939' PUMPING 1.7 BPM WITH 1700 PSI DIFFERENTIAL.SET DOWN 1K. NO GO.P/U,NOTIFY SLB TEAM LEAD FIELD SUPERINTENDANT AND ODE. DECISION MADE TO RUN 3.80 MILL AND MOTOR. 20:10 - 20:20 0.17 FISH N DPRB RUNPRD FLOWCHECK WELL.STATIC. PVT=330 BBLS. 20:20 - 22:10 1.83 FISH N DPRB RUNPRD POH WITH JET BLASTER BHA. 22:10 - 22:20 0.17 FISH N DPRB RUNPRD FLOWCHECK AT SURFACE-STATIC. PJSM FOR BHA. 22:20 - 22:40 0.33 FISH N DPRB RUNPRD L/D BHA#14. INSPECT JET BLASTER. 22:40 - 23:30 0.83 FISH N DPRB RUNPRD WAIT ON 3.80 MILL TO ARRIVE FROM BAKER SHOP. 23:30 - 00:00 0.50 FISH N DPRB RUNPRD_ M/U 3.80 DS MILL,XTREME MOTOR, HOT, DGS,DPS,EDC,PC, SWP,LQC,UQC,XO,CTC. M/U INJECTOR. 12/18/2011 00:00 - 02:15 2.25 FISH N DPRB RUNPRD TEST QTS,RIH WITH BHA#15 TO 5870' P/U WT=45K.S/O WT=15K.PUMP 2.5 BPM. 2100 PSI. RIH 6 FPM PAST GLM @ 5928'-CLEAN. RIH,TAG GLM AT 6940' PVT=323 BBLS. 02:15 - 03:00 0.75 FISH N DPRB RUNPRD ,MILL OBSTRUCTION FROM 6939.8; PUMPING 2.5 BPM. F/S=2030 PSI. 130 PSI MOTOR WORK. 1-1.5K WT ON MILL. MILL 1.3'.STOP MILLING-NOTIFY ODE. 03:00 - 04:00 1.00 FISH N DPRB RUNPRD CIRCULATE.5 BPM KEEPING COIL MOVING- WAIT ON ORDERS FROM TOWN. DECISION N MADE TO POH, UD BHA- FREEZE PROTECT WELL.RDMO. 04:00 - 04:10 0.17 FISH N DPRB RUNPRD FLOWCHECK WELL-STATIC. 04:10 - 05:30 1.33 FISH N DPRB RUNPRD POH WITH BHA#15. 05:30 - 05:40 0.17 FISH N DPRB RUNPRD FLOWCHECK WELL-STATIC. PJSM FOR BHA. 05:40 - 06:45 1.08 FISH N DPRB RUNPRD L/D MILL ASSY. 06:45 - 07:15 0.50 WHSUR P POST PJSM W/LITTE RED,FREEZE PROTECTING WELL. 07:15 - 08:00 0.75 WHSUR P POST PJSM.M/U NOZZLE ASSEMBLY,TEST QTS, OK. 08:00 - 10:00 2.00 WHSUR P POST RIH W/NOZZLE TO 2500'. -FILL COIL W/DIESEL,(45 BBLS). -FLOW CHECK WELL,10 MINUTES,WELL STABLE. Printed 12/27/2011 12:42.15PM *North America -ALASKA- BP Page 5 of 6 . Operation Summary Report Common Wet Name:W-21 AFE No Event Type: COM-ONSHORE(CON) Start Date: 12/16/2011 End Date: X3-00XXD-C: (819,680.00) Project:Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor: NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 10:00 - 11:00 1.00 WHSUR P POST POOH W/23/8"COIL, LAYING IN DIESEL,1:1. -AT SURFACE,FLOW CHECK 10 MINUTES, WELL STABLE. 11:00 - 13:00 2.00 WHSUR P POST PICKLING COIL, PUMP KCL,TRANSFERING FLUID. -PUMP A REEL VOLUME OF FRESH WATER, (55 BBLS) -PUMP 10 BBLS INHIBITOR&10 BBLS METHANOL. 13:00 - 14:30 1.50 WHSUR P POST PJSM.BLOW DOWN REEL W/N2 TO TIGER 't TANK. -BLEED OFF ALL PRESSURE. 14:30 - 15:00 0.50 WHSUR P POST LAY DOWN NOZZLE. 15:00 - 17:45 2.75 RIGD P POST PJSM. INSTALL GRAPPLE,PULL BACK COIL. -SECURE COIL, INSTALL TRAVEL BAR. -BREAK OFF PACK OFF,STAND BACK INJECTOR. -EMPTY AND CLEAN PITS. 17:45 - 18:00 0.25 RIGD P POST M/U LUBRICATOR CAP. 18:00 - 18:30 0.50 RIGD P POST CREW C/O.DISCUSS ONGOING RIG OPS, CHECK RIG EQUIPMENT. ORDER 50/50 METHONAL PUP. 18:30 - 21:30 3.00 RIGD P POST SLB INSTALLING SHALE SHAKER CAMERA. HOLD RIG ORIENTATION WITH SCAFFOLD CREW. PJSM-LOAD AND RIG SCAFFOLD AROUND GAS BUSTER. CONTINUE TO EMPTY AND CLEAN PITS. PJSM-R/D REEL HARDLINE AND PREP REEL FOR LOADOUT. 21:30 - 22:30 1.00 WHSUR P POST PJSM,R/U AND FILL TREE WITH 50/50 METHANOL. PRESSURE TEST LUBRICATOR CAP AGAINST SWAB VALVE- TO 250/3500 PSI.CHART TEST 5 MIN EACH. SHUT CHOKE-OPEN MASTER AND SWAB- STATIC,OPEN CHOKE. 22:30 - 23:30 1.00 WHSUR P POST PJSM WITH VALVE CREW AND GREASE CREW. REVIEW SOP FOR INSTALLING BPV. SERVICE TREE VALVES. R/U AND INSTALL BPV WITH DRY ROD. 23:30 - 00:00 0.50 WHSUR P POST INSTALL LUBRICATOR CAP. TEST AGAINST CLOSED MASTER AND SWAB VALVE- TO 250/3500 PSI 5 MIN EACH-CHART TEST. 12/19/2011 00:00 - 01:00 1.00 WHSUR P POST PJSM WITH WITH CH2MHILL AND CREW. REVIEW SOP FOR REEL REMOVAL. REMOVE REEL. REMOVE REEL PLATES. 01:00 - 04:50 3.83 WHSUR P POST BLOW DOWN MUD MANIFOLD, KILL LINE, CHOKE MANIFOLD. PJSM, REMOVE BOP RAMS AND INSPECT. CHANGE OUT 2 TOP SEALS AND PACKERS ON UPPER 2 3/8"COMBI RAMS. ALSO CHANGE BLADE SEAL AND TOP SEAL ON BLIND SHEAR RAMS. RE-INSTALL RAMS. 04:50 - 05:30 0.67 WHSUR P POST PJSM, N/D BOPE. N/U TREE CAP. Printed 12/27/2011 12:42:15PM forth America -ALASKA- BP Page 6 of 6 Operation Summary Report Common Well Name:W-21 AFE No Event Type:COM-ONSHORE(CON) Start Date: 12/16/2011 End Date: X3-00XXD-C: (819,680.00) Project: Prudhoe Bay Site: PB W Pad Rig Name/No.: NORDIC 2 Spud Date/Time:3/26/1989 12:00:00AM Rig Release: Rig Contractor:NORDIC CALISTA UWI:500292192900 Active Datum:W-21A Revised @82.72ft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (ft) 05:30 - 08:00 2.50 WHSUR P POST ATTEMPT TO GET A TEST ON THE TREE CAP. -TESTING WITH MEOH AGAINST CLOSED SSV,SWAB AND MASTER VALVES. -UNABLE TO GET SATISFACTORY TEST, CALL OUT GREASE CREW. 08:00 10:00 2.00 WHSUR P POST CONTINUE WITH END OF WELL ACTIVITIES. 10:00 - 12:00 2.00 WHSUR P POST -PJSM.CYCLE AND GREASE VALVES. -AFTER SEVERAL ATTEMPTS,ABLE TO GET GOOD TESTS. -TEST @ 250 PSI/5 MIN/CHARTED AND 3500 PSI/5 MIN/CHARTED. -SECURE WELL,RELEASE RIG @ 12:00 HRS, 12/19/2011. Printed 12/27/2011 12:42:15PM .p.■ BAKER HUGHES INTEQ North America - ALASKA - BP Prudhoe Bay PB W Pad W-21 500292192900 W-21AL1 Survey: MWD Survey Report - Geographic 28 December, 2011 FMII BAKER 0 p �J HUGHES Survey Report-Geographic �✓ INTEQ Company: North America-ALASKA-BP Local Co-ordinate Reference: Well W-21 Project: Prudhoe Bay TVD Reference: W-21A Revised @ 82.72ft(W-21A Revised) Site: PB W Pad MD Reference: W-21A Revised @ 82.72ft(W-21A Revised) Well: W-21 North Reference: True Wellbore: W-21AL1 Survey Calculation Method: Minimum Curvature Design: W-21AL1 Database: EDM.16-ANC Prod-WH24P Project Prudhoe Bay,GPB,PRUDHOE BAY Map System: US State Plane 1927(Exact solution) System Datum: Mean Sea Level Geo Datum: NAD 1927(NADCON CONUS) Using Well Reference Point Map Zone: Alaska Zone 04 Using geodetic scale factor Site PB W Pad,TR-11-12 Site Position: Northing: 5,957,194.18ft Latitude: 70°17'31.506 N From: Map Easting: 609,919.18ft Longitude: 149°6'36.343 W Position Uncertainty: 0.00 ft Slot Radius: 0.000 in Grid Convergence: 0.84° Well W-21 API No 500292192900 Well Position +N/-S 0.00 ft Northing: 5,959,631.13 ft Latitude: 70°17'55.164 N +E/-W 0.00 ft Easting: 612,049.07 ft Longitude: 149°5'33.217 W Position Uncertainty 0.00 ft Wellhead Elevation: ft Ground Level: 47.83 ft Wellbore W-21AL1 API No 500292192960 Magnetics Model Name Sample Date Declination Dip Angle Field Strength (°) (°) (nT) BGGM2011 12/4/2011 21.08 80.97 57,652 Design W-21AL1 Audit Notes: Version: Phase: ACTUAL Tie On Depth: 10,463.15 Vertical Section: Depth From(TVD) +N/-S +E/-W Direction (ft) (ft) (ft) (°) 29.66 0.00 0.00 59.32 Survey Program Date: 12/12/2011 From To (ft) (ft) Survey(Wellbore) Tool Name Description 54.76 9,298.10 Survey#1 GCT MS(W-21) GCT-MS Schlumberger GCT multishot 9,327.00 9,343.00 W-21A Srvy 1 Blind(W-21A) BLIND Blind drilling 9,375.75 9,438.48 W-21A Srvy 2 Inc+trend(W-21A) INC+TREND Inclinometer+known azi trend 9,471.73 10,463.15 W-21A Srvy 3 MWD+IFR+MS(W-21A) MWD+IFR+MS MWD+IFR+Multi Station 10,473.50 11,895.00 MWD(W-21AL1) MWD MWD-Standard 12/28/2011 11:58:18AM Page 2 COMPASS 2003.16 Build 73 pith BAKER �p HUGHES Survey Report Geographic (4.0) t✓ INTEQ Company: North America-ALASKA-BP Local Co-ordinate Reference: Well W-21 Project: Prudhoe Bay TVD Reference: W-21A Revised @ 82.72ft(W-21A Revised) Site: PB W Pad MD Reference: W-21A Revised @ 82.72ft(W-21A Revised) Well: W-21 North Reference: True Wellbore: W-21AL1 Survey Calculation Method: Minimum Curvature Design: W-21AL1 Database: EDM.16-ANC Prod-WH24P Survey Measured Vertical Map Map Depth Inclination Azimuth Depth +N/-S +EI-W Northing Easting (ft) (0) (0) (ft) (ft) (ft) (ft) (ft) Latitude Longitude 10,463.15 76.55 106.81 8,934.72 2,119.26 2,737.78 5,961,790.80 614,754.72 70°18'16.002 N 149°4'13.385 W TIP 10,473.50 77.05 107.25 8,937.09 2,116.31 2,747.42 5,961,787.99 614,764.39 70°18'15.973 N 149°4'13.104 W KOP 10,490.44 78.53 107.25 8,940.67 2,111.40 2,763.23 5,961,783.32 614,780.27 70°18'15.924 N 149°4'12.643 W 10,520.34 84.93 107.25 8,944.97 2,102.63 2,791.47 5,961,774.97 614,808.64 70°18'15.838 N 149°4'11.819 W 10,550.45 84.64 112.50 8,947.71 2,092.44 2,819.66 5,961,765.20 614,836.98 70°18'15.738 N 149°4'10.998 W 10,580.19 85.12 117.96 8,950.36 2,079.82 2,846.45 5,961,752.98 614,863.95 70°18'15.613 N 149°4'10.217 W 10,610.23 83.60 123.81 8,953.32 2,064.49 2,872.09 5,961,738.03 614,889.81 70°18'15.463 N 149°4'9.469 W 10,640.30 84.09 129.10 8,956.55 2,046.73 2,896.13 5,961,720.63 614,914.11 70°18'15.288 N 149°4'8.768 W 10,670.66 82.86 136.73 8,960.00 2,026.21 2,918.20 5,961,700.45 614,936.49 70°18'15.086 N 149°4'8.125 W 10,700.66 85.11 142.98 8,963.15 2,003.41 2,937.42 5,961,677.94 614,956.05 70°18'14.862 N 149°4'7.565 W 10,730.68 86.58 150.62 8,965.33 1,978.38 2,953.81 5,961,653.16 614,972.80 70°18'14.615 N 149°4'7.087 W 10,760.69 86.99 155.70 8,967.01 1,951.65 2,967.33 5,961,626.64 614,986.72 70°18'14.352 N 149°4'6.693 W 10,790.59 88.10 162.37 8,968.29 1,923.77 2,978.01 5,961,598.92 614,997.81 70°18'14.078 N 149°4'6.382 W 10,817.41 92.85 167.95 8,968.07 1,897.86 2,984.87 5,961,573.12 615,005.06 70°18'13.823 N 149°4'6.182 W 10,850.52 90.03 173.23 8,967.24 1,865.22 2,990.28 5,961,540.57 615,010.96 70°18'13.502 N 149°4'6.025 W 10,880.96 90.34 177.07 8,967.14 1,834.90 2,992.86 5,961,510.29 615,013.98 70°18'13.204 N 149°4'5.950 W 10,910.46 92.86 180.53 8,966.31 1,805.42 2,993.47 5,961,480.83 615,015.04 70°18'12.914 N 149°4'5.933 W 10,926.16 93.35 181.30 8,965.46 1,789.75 2,993.22 5,961,465.15 615,015.02 70°18'12.760 N 149°4'5.940 W 10,940.33 92.55 180.30 8,964.73 1,775.60 2,993.03 5,961,451.00 615,015.03 70°18'12.621 N 149°4'5.946 W 10,970.39 90.58 177.13 8,963.91 1,745.56 2,993.70 5,961,420.98 615,016.16 70°18'12.325 N 149°4'5.927 W 11,000.37 90.34 173.71 8,963.67 1,715.69 2,996.09 5,961,391.15 615,018.99 70°18'12.032 N 149°4'5.857 W 11,031.27 89.20 170.67 8,963.80 1,685.08 3,000.29 5,961,360.61 615,023.65 70°18'11.731 N 149°4'5.735 W 11,060.22 89.36 167.06 8,964.16 1,656.68 3,005.88 5,961,332.30 615,029.66 70°18'11.451 N 149°4'5.573 W 11,080.78 88.28 164.89 8,964.58 1,636.74 3,010.86 5,961,312.43 615,034.94 70°18'11.255 N 149°4'5.428 W 11,100.58 86.16 162.01 8,965.54 1,617.78 3,016.49 5,961,293.57 615,040.85 70°18'11.069 N 149°4'5.264 W 11,120.82 86.71 160.73 8,966.80 1,598.64 3,022.95 5,961,274.53 615,047.59 70°18'10.880 N 149°4'5.076 W 11,140.77 88.74 158.07 8,967.60 1,579.98 3,029.96 5,961,255.98 615,054.88 70°18'10.697 N 149°4'4.871 W 11,170.69 91.29 153.55 8,967.59 1,552.70 3,042.22 5,961,228.88 615,067.54 70°18'10.428 N 149°4'4.514 W 11,200.47 94.15 149.79 8,966.17 1,526.52 3,056.33 5,961,202.92 615,082.04 70°18'10.171 N 149°4'4.103 W 11,230.67 94.67 145.25 8,963.85 1,501.13 3,072.49 5,961,177.77 615,098.58 70°18'9.921 N 149°4'3.632 W 11,261.24 94.76 140.86 8,961.34 1,476.79 3,090.80 5,961,153.71 615,117.24 70°18'9.682 N 149°4'3.099 W 11,291.32 96.46 141.53 8,958.40 1,453.46 3,109.56 5,961,130.66 615,136.35 70°18'9.452 N 149°4'2.552 W 11,320.88 96.89 147.04 8,954.96 1,429.63 3,126.69 5,961,107.10 615,153.83 70°18'9.218 N 149°4'2.053 W 11,350.95 94.82 151.04 8,951.89 1,403.98 3,142.07 5,961,081.68 615,169.59 70°18'8.965 N 149°4'1.605 W 11,381.03 92.49 154.32 8,949.97 1,377.32 3,155.85 5,961,055.23 615,183.76 70°18'8.703 N 149°4'1.203 W' 11,410.85 91.72 159.59 8,948.88 1,349.91 3,167.51 5,961,028.00 615,195.83 70°18'8.434 N 149°4'0.864 W 11,440.94 92.85 157.51 8,947.68 1,321.93 3,178.50 5,961,000.18 615,207.24 70°18'8.158 N 149°4'0.543 W 11,470.90 90.80 155.20 8,946.72 1,294.50 3,190.51 5,960,972.94 615,219.65 70°18'7.888 N 149°4'0.194 W 11,502.86 89.48 150.03 8,946.64 1,266.13 3,205.21 5,960,944.80 615,234.77 70°18'7.609 N 149°3'59.766 W 11,530.80 90.46 146.67 8,946.66 1,242.35 3,219.87 5,960,921.24 615,249.78 70°18'7.375 N 149°3'59.338 W 11,561.01 90.83 141.80 8,946.32 1,217.85 3,237.52 5,960,897.00 615,267.79 70°18'7.134 N 149°3'58.824 W 11,591.07 89.57 137.98 8,946.21 1,194.86 3,256.88 5,960,874.31 615,287.49 70°18'6.908 N 149°3'58.260 W 11,620.47 89.39 133.55 8,946.48 1,173.80 3,277.38 5,960,853.56 615,308.31 70°18'6.701 N 149°3'57.662 W 11,650.32 89.79 128.99 8,946.69 1,154.12 3,299.81 5,960,834.22 615,331.02 70°18'6.507 N 149°3'57.009 W 11,680.32 88.34 125.49 8,947.18 1,135.97 3,323.69 5,960,816.43 615,355.17 70°18'6.329 N 149°3'56.313 W 11,710.62 86.68 121.43 8,948.50 1,119.28 3,348.93 5,960,800.12 615,380.66 70°18'6.165 N 149°3'55.577 W 11,740.68 87.42 117.54 8,950.05 1,104.51 3,375.06 5,960,785.74 615,407.00 70°18'6.019 N 149°3'54.815 W 11,770.71 88.56 114.63 8,951.10 1,091.32 3,402.01 5,960,772.95 615,434.14 70°18'5.889 N 149°3'54.030 W 11,800.73 86.01 112.19 8,952.52 1,079.40 3,429.53 5,960,761.45 615,461.83 70°18'5.772 N 149°3'53.228 W 11,830.89 85.02 108.65 8,954.88 1,068.91 3,457.70 5,960,751.38 615,490.15 70°18'5.669 N 149°3'52.407 W 11,850.69 84.93 105.21 8,956.62 1,063.17 3,476.57 5,960,745.92 615,509.10 70°18'5.612 N 149°3'51.857 W 11,895.00 84.93 105.21 8,960.53 1,051.59 3,519.16 5,960,734.98 615,551.85 70°18'5.498 N 149°3'50.615 W TD 12/282011 11:58:18AM Page 3 COMPASS 2003.16 Build 73 TREE= . 4-1/16"CW WELLHEAD= McEVOY IA/-21A SAFETY CHROME TBG. ANGLE>70°@ 10370'*** ACTUATOR= BAKER C ORIG.KB.ELEV= 90.9 L1 & L1 -01 ORIG.BF.ELEV= 54.46' KOP= 4900' I Max Angle= 97°@ 12614' 2209' —14-1/2"HES X NIP,ID=3.813" Datum MD= 10300' I . Datum TVD= 8800'SS 13-3/8"CSG,68#,L-80, ID=12.415" — 2710' GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH PORT DATE Minimum ID = 2.370"@ 10501' 6 3107 3105 0 1 MMG DMY RK 0 11/18/01 2-7/8" DEPLOY SLEEVE (L1-01) 5 3636 3633 0 MMG DOME RK 16 12/11/01 4 5928 5844 32 MMG DOME RK 16 12/11/01 3 6929 6599 44 MMG `DPJMY RK 0 11/18/01 9-5/8"X 7"BKR ZXP PKR, ID=6.270" --I 9142' 2 8309 7589 44 MMG DOME RK 16 11/18/01 9-5/8"X 7"BKR HMC HGR, ID=6.270" —I 9155' 1 9812 8647 54 KBG-2 SO BK 22 07/30/07 0 STA#4 =VALVED POSSIBLY DAMAGED(RIG OPERS 12/26/11) 9-5/8"MILLOUT WINDOW(W-21A) 9327'-9343' 9-5/8"CSG,47#,L-80, ID=8.681" — '-9327 9871' —14-1/2"HES X NIP, ID=3.813" 4-1/2"TBG, 12.6#, 13CR-80 FOX, — 9937' $ 9881' -{7"X 4-1/2"BKR S-3 PKR, ID=3.875" .0152 bpf, ID=3.958" -• I ' 9905' --I4-1/2"HES X NIP, ID=3.813" 7"LNR,26#, L-80 BTC-M,.0383 bpf,ID=6.276" — 10085' PERFORATION SUMMARY I I 9925' —14-1/2"HES XN NIP,MILLED TO 3.80"(12/05/11) REF LOG:SWS VISION RESISTIVITY ON 11/10/01 9933' —17"X 5"BKR ZXP LTPw/C2 PROFILE, ID=4.34" ANGLE AT TOP PERF:N/A Note:Refer to Production DB for historical perf data 9937' _-14-1/2"WLEG, ID=3.958" SIZE SPF INTERVAL Opn/Sqz DATE 9947' —17"X 5"BKR FLEX LOCK HYD LNR HGR, ID=4.408" W-21A 2-1/2" 4 10464 10548 0 11/16/01 9956' —1 5"X 4-1/2"XO, ID=3.97 2-1/2" 4 10600- 10674 0 11/16/01 2-1/2" 4 12897- 13299 0 11/16/01 MILLOUT WINDOW(W-21AL1) 10474'-10483' 2-1/2" 4 13404- 13535 0 11/16/01 — 2-1/2" 4 13750- 14128 0 11/16/01 10501' —IBTT SHORTY DEPLOY SLV, ID=2.370" 2-1/2" 4 14170- 14305 0 11/16/01 2-1/2" 4 14335- 14380 0 11/16/01 - _ _ _ _ 2-1/2" 4 14595- 14710 0 11/16/01 T _ — — — — —— W-2T -01 2-1/2" 4 14725- 14785 0 11/16/01 — __ — — — sqf 2-7/8"LNR,6.16#,L-80 STL, 11752' W-21AL1 .0058 bpf,ID=2.440" 2-7/8" SLTD 10529- 11883 SLOT 12/10/11 ——— W-21AL1-01 __ 2-7/8" SLID 10505-11174 SLOT 12/15/11 10510' BTT ALUMINUM —— i —_ 2-7/8" SLID 11578- 11736 SLOT 12/15/11 C-------2-"CW<I' BILLET, ID=1.00"2-7/8"LNR,6.2#,L-80 STL, — .0058 bpf, ID=2.441" �t 4-1/2"BKR RETRY WHIPSTOCK(12/05/11) — 10473' 1 PBTD — 14805' I\ yW-2 A 12711' —14-1/2"MARKER JOINT 4-1/2"LNR, 12.6#,L-80 IBT-M,.0152 bpf, ID=3.958" 1 14892' `••i DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04/23/89 AUDI 3 ORIG COMPLETION 01/06/12 JL/PJC FINAL DRLG CORRECTIONS WELL: W-21A/L1 &L1-01 ' 10/31/90 D-16 RWO PERMIT No: 2011110(2111310)(2111320) 11/18/01 N9ES SIDETRACK(W-21A) API No: 50-029-21929-01 (60)(61) 12/19/11 NORDIC 1 CTD ML(W-21A L1 &L1-01) SEC 21,T11N,R12E,627'FNL&1180'FEL 01/03/12 PJC DRLG HO CORRECTIONS 01/05/12 PJC DRLG DRAFT CORRECTIONS BP Exploration(Alaska) 1 SEAN PARNELL,GOVERNOR ALASKA OIL AND GASsir[7,\ITIE DiF ALAsE 333 W.7th AVENUE,SUITE 100 CONSERVATION COM IISSION ANCHORAGE,ALASKA 99501-3539 PHONE (907)279-1433 John McMullen FAX (907)276-7542 Engineering Team Leader BP Exploration (Alaska), Inc. P.O. Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU W-21AL1 BP Exploration (Alaska), Inc. Permit No: 211-131 Surface Location: 626' FNL, 1180' FEL, SEC. 21, T11N, R12E, UM Bottomhole Location: 443' FSL, 2370' FWL, SEC. 15, T11N, R12E, UM Dear Mr. McMullen: Enclosed is the approved application for permit to drill the above referenced development well. The permit is for a new wellbore segment of existing well PBU W-21A, Permit No 201- 110, API 50-029-2192901-00. Production should continue to be reported as a function of the original API number stated above. This permit to drill does not exempt you from obtaining additional permits or an approval 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. 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. Sincerely, .� ', Daniel T. Seamount, Jr. Chair DATED this day of October, 2011. cc: Department of Fish & Game, Habitat Section w/o encl. (via e-mail) Department of Environmental Conservation w/o encl. (via e-mail) STATE OF ALASKA RECEIVED' ALAS' 'SIL AND GAS CONSERVATION COMM' ON PERMIT TO DRILL SEP 2 7 2011.E 20 AAC 25.005 ����((►►,,�� ((;;MM W9-// 1 a.Typeof work: 1 b.Proposed Well Class: A, BA y FmPs,71oQ Po ®Development Oil ❑Service-Wini ❑Single Zone o Drill ®Redrill 0 Stratigraphic Test 0 Development Gas 0 Service-Supply 0 Multiple Zone 0 Coalbed Afiejaaggeiydrates ❑ Re-Entry 0 Exploratory 0 Service-WAG 0 Service-Disp Shale Gas 2. Operator Name: 5.Bond: ® Blanket 0 Single Well 11. Well Name and Number: BP Exploration(Alaska) Inc. Bond No. 6194193 PBU W-21AL1 3. Address: 6. Proposed Depth: 12.Field/Pool(s): P.O. Box 196612,Anchorage,Alaska 99519-6612 MD 11895' ND 8861'ss Prudhoe Bay Field/Prudhoe 4a. Location of Well(Governmental Section): 7. Property Designation(Lease Number): Bay Oil Pool Surface: ADL 028263_&94-745 626'FNL, 1180'FEL, SEC.21,T11N, R12E, UM Top of Productive Horizon: 8. Land Use Permit: /t''-- // 13. Approximate Spud Date: 1500'FSL, 1540'FWL, SEC. 15,T11N, R12E, UM November 25,2011 Total Depth: 9.Acres in Property: 14.Distance to Nearest Property: 443'FSL,2370'FWL, SEC. 15,T11N, R12E, UM 2560 21,720' 4b. Location of Well(State Base Plane Coordinates-NAD 27): 10.KB Elevation above MSL: 82.72' feet 15.Distance to Nearest Well Open Surface: x- 612049 y-5959631 Zone- ASP4 GL Elevation above MSL: 53.06' feet to Same Pool: 695' 16.Deviated Wells: Kickoff Depth: 10492' feet 17.Maximum Anticipated Pressures in psig(see 20 AAC 25.035) Maximum Hole Angle: 96 degrees Downhole: 3418 Surface: 2538 18. Casing Program: Specifications Top-Setting Depth-Bottom Quantity of Cement,c.f.or sacks Hole __. Casing _ Weight Grade Coupling Length MD ND MD _ ND (including stage data) 4-1/8" 2-7/8" 4.6#. , L-80 STL 1374' 10520'-8863'ss 11895' 8861'ss Uncemented Slotted Liner 19. PRESENT WELL CONDITION SUMMARY(To be completed for Redrill and Re-entry Operations) Total Depth MD(ft): Total Depth ND(ft): Plugs(measured): Effective Depth MD(ft): Effective Depth ND(ft): Junk(measured): 14892' 897B' None 14805' 8976' None Casing Length Size Cement Volume MD ND Conductor/Structural _ 110' 20" 110' 110' Surface 2710' 13-3/8" 3840 cu ft Coldset II&Ill 2710' 2708' I grrip4iale 9327' 9-5/8" 2122 cu ft Class'G' 9327' 8345' Production Liner _ 943' 7" 243 cu ft Class'G' 9142'-10085' 8210'-8788' Liner , 4949' 4-1/2" 696 cu ft Class'G' 9933'-14892' 8713'-8976' Perforation Depth MD(ft): 10464'-14785' Perforation Depth ND(ft): 8935'-8976' 20.Attachments: 0 Property Plat ®BOP Sketch ®Drilling Program 0 Time vs Depth Plot 0 Shallow Hazard Analysis ❑ Diverter Sketch 0 Seabed Report ®Drilling Fluid Program IN 20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the foregoing is true and correct. Contact Jacob Leemhuis,564-4989 Printed Name .h,,•cy ul- Title Engineering Team Leader Prepared By Name/Number Signature -' Phone 564-4711 Date 7A//t Terrie Hubble,564-4628 Commission Use Only Permit To I rill API Number: Permit Appr al D te: See cover letter for Number: �fJj:jf 50-029-21929-60-00 I f y// ) other requirements Conditions of Approval: If box is checked,well may not be used to explore for,test,or produce coalbed ethane,gas hydrates,or gas contained shales: (r Other: 35 O PS BOP 'Ms Samples Req'd: Oyes 2I No Mud Log Req'd: Oyes "No /11-ZS-oo pS:, Apt n K bar Ts t C j H2S Measures: Lel Yes 0 No Directional Survey Req'd: Z Yes 0 No /O/'9-7'// ...,-- APPROVED BY THE COMMISSION Dat:-411111rForm 10-40vised9 This permit is valid for 24 months fro e date of approval(20 AAC 25.005(g)) Submit In Duplicate RIGINA [ ,,lle 19'3 i To: Alaska Oil & Gas Conservation Commission ' From: Jacob Leemhuis • b p CTD Engineer �ti14 Date: September 13, 2011 Re: W-21AL1 & L1-01 Permit to Drill request Approval is requested for apermit to drill a CTD multilateral sidetrack from well W-21A. Well W-21 was a vertical well drilled and completed in early 1989. There was an unsuccessful water shut-off in 1990, and suspected channel down to aquifer. W-21 was kept shut-in until rig-side-tracked in 2001, along the northern periphery. W-21A was completed with —5000' of 4-1/2" L-80 horizontal liner, cemented and 1266' of perforations. In 2008, 158' of perforations were added in the heel. Well had an acid stimulation in May of 2009 and an SIT was pumped in August, 2009. The proposed plan for W-21AL1 &L1-01 is to kick off is at the top of Zone 4 in existing perforations. A retrievable whipstock will be set and oriented to the high side (0 deg). The first lateral will make a hard 20DLS right turn and undulate in Zone 4. A slotted liner with k` aluminium billet on top will be run and dropped off outside the window. The second Jatera1' sP' will be drilled off the aluminium billet and make a 30DLS turn. The second lateral will be • completed with a slotted liner dropped off outside the window. The whipstock will be recovered by the drilling rig. The following describes work planned. A schematic diagram of the proposed sidetrack is attached for reference. CTD Sidetrack Summary Pre-Rig Work: (scheduled to begin September 30, 2011) 1. 0 MIT-IA to 3,000 psi; MIT-OA to 2,000 psi. 2. C Dummy WS drift. 3. W Test: PPPOT-T. Torque LDS 4. V PT MV, SV, WV 5. 0 Blind and bleed lines, remove well house, level pad 6. F Load & Kill well. Freeze protect to 2,500' TVD. 7. V Set TWC —24 hrs prior to rig arrival Rig Work: (scheduled to begin on November 25, 2011) 1. MIRU and test BOPE to 250 psi low and 3,500 psi high. 2. Set 4-1/2" Mono-Bore Whipstock oriented high side (0 degree) w-,11/41- 3. i/',11/413. Mill 3.8" window at 9625' and 10' of rathole. Swap the well to Flo-Pro. 4. First Lateral a. Drill Build: 4.125" OH, 380' (20deg/100 planned) A b. Drill Lateral: 4.125" OH, 1,023' (12 deg/100 planned) with resistivity c. Run 2-7/8" slotted liner with aluminium billet on top and drop outside of window. 5. Second Lateral a. Drill Build: 4.125" OH, 324' (30 deg/100 planned) b. Drill Lateral: 4,125" OH, 899' (12 deg/100 planned) with resistivity V c. Run 2-7/8" slotted liner and drop outside of window. Wax-41--61 6. Pull 4-1/2" Mono-Bore Whipstock 7. Freeze protect well, RDMO Post-Rig Work: 1. Re-install well house and attach production lines. 2. Pull BPV. 3. Run GLV as needed. 4. Test separator Mud Program: • Well kill: 8.4 ppg brine. • Milling/drilling: 8.6 ppg GeoVis for milling window and drilling. Disposal: • All drilling and completion fluids and all other Class II wastes will go to Grind & Inject. • All Class I wastes will go to Pad 3 for disposal. Hole size: • 1st lateral: 1,403' of 4.125" hole V • 2nd lateral: 1,223' of 4.125" hole ,S Casing Program: • 2-7/8" STL, 4.6 pounds per foot, L-80 slotted liner , Well Control: • BOP diagram is attached. • Pipe rams, blind rams and the CT pack off will be pressure tested to 250 psi and to 3,500 psi. • The annular preventer will be tested to 250 psi and 2,500 psi. Directional • See attached directional plan. Maximum planned hole angle is 92°. • Magnetic and inclination surveys will be taken every 30 ft. No gyro will be run. • Distance to nearest property — 21,720 ft. • Distance to nearest well within pool —695 ft Logging • MWD directional, Gamma Ray and resistivity will be run over all of the open hole section. • Cased hole GR/CCL/MCNL logs will be run. Anti-Collision Failures • None Hazards • No planned crossings of faults. • There are no wells on W-Pad with H2S > 100 ppm Reservoir Pressure • The reservoir pressure on W-21A is expected to be 3,418 psi at 8,800' TVDSS. (7.47 ppg equivalent). • Maximum expected surface pressure with gas (0.10 psi/ft) to surface is 2,538 psi. Jacob Leemhuis CTD Engineer CC: Well File Sondra Stewman/Terrie Hubble IFIL= b VCtVUY NELLHEAD= McEVOY W-2 1 A SA NOTES: 4-1/2"CHROME TBG. WELL 4CTUATOR= BAKER ANGLE>70°( 10370'&>90°@ 11056'. (B. ELEV= 82.72' 3F. ELEV= 54.46' <OP= 4900, Urax Angle= @ 12645' Datum MD= 10300' Datum TVD= 8800'SS I I 2209' H 4-1/2"HES X NIP, ID=3.813" GAS LIFT MANDRELS 13-3/8"CSG,68#, L-80, ID=12.415" — 2710' MD ND DEV TYPE VLV LATCH PORT DATE 6 3107 3022 0 MMG DMY RK 0 11/18/01 5 3636 3551 0 MMG DONE RK 16 12/11/01 L 4 5928 5762 31 MMG DONE RK 16 12/11/01 3 6929 6515 42 MMG DMY RK 0 11/18/01 Minimum ID = 3.725" @ 9925' 2 8309 7506 46 MMG DOME RK 16 11/18/01 4-1/2" HES XN NIPPLE 1 9812 8565 54 KBG-2 SO BK 22 07/30/07 PERFORATION SUMMARY REF LOG:SWS VISION RESISTIVITY ON 11/10/01 ANGLE AT TOP PERF:77 @ 10464' 9142' 9-5/8"X 7"BKR ZXP PKR, ID=6.270" Note:Refer to Production DB for historical perf data 9155' I9-5/8"X 7"BKR HMC HGR, ID=6.270" SIZE SPF INTERVAL Opn/Sqz DATE 2-1/7 4 10464- 10548 0 11/16/01 2-1/2" 4 10600- 10674 0 11/16/01 2-1/7 4 12897- 13299 0 11/16/01 9-5/8"MILLOUT WINDOW 2-1/2' 4 13404- 13535 0 11/16/01 9327'-9343' (OFF WHIPSTOCK) 2-1/2' 4 13750- 14128 0 11/16/01 2-1/2' 4 14170- 14305 0 11/16/01 2-1/2" 4 14335- 14380 0 11/16/01 9871' —14-1/2"HES X NIP, ID=3.813" 2-1/2" 4 14595- 14710 0 11/16/01 2-1/2" 4 14725- 14785 0 11/16/01 9881' H7"X 4-1/2"BKR S-3 PKR,ID=3.875" 41: ` � 9905' —I4-1/2"HES X NIP, ID=3.813" 9925' H4-1/2"HES XN NIP, ID=3.725" •11VV•IIVIV 9937' H4-1/2"WLEG, ID=4.00" �iiiiiiliiiliiii tt N� 9-5/8"CSG,47#,L-80, ID=8.681" H 10121' ` 12711' H4-1/2"x 20'MARKER JT 4-1/2"TBG, 12.6#, 13-CR-80, .0152 bpf, ID=3.958" H 9936' ` 7"X 4-1/2"BKR ZXP PKR/HGR, ID=4.34" H 9933' ` 7"LNR,26#,L-80, .0383 bpf, ID=6.276" —{ 10085' ` ` PBTD H 14803' 111�1- ^ 1/2"LP1R, 12.6H, L 80, .0153 Of,ID-3.055" � 14892' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04123189 ORIG COMPLETION 04/01/06 JRP/PJC GLV C/O WELL: W-21A 10131190 I?NO 08/04/07 DTR/SV GLV C/O(07/30/07) PERMIT No:'2011110 11/18/01 RIG SIDETRACK API No: 50-029-21929-01 12/11/01 7/TLP GLV CHANGES SEC 21,T11 N,R12E,626'SNL&1180'WEL 12/28/01 CH/TP CORRECTIONS 06/25/03 KSB/KK SAFETY NOTE REVISION BP Exploration(Alaska) Ktt= b MCtV UY LHEAD= McEVOY ' •CTUATOR= BAKER SA NOTES: 4-112"CHROME TBGWELL <B ELEV= 8272 ANGLE>70°@ 10370'&>90°(11056'. 3F. ELEV= 54.46' <OP= 4900' Vlax Angle= )7 @ 12645' Datum MD= 10300' , I 2209' H 4-1/2"HES X NIP, ID=3.813" Datum TVD= 8800'SS GAS LIFT MANDRELS 13-3/8"CSG,68#, L-80, ID=12.415" — 2710' MD TVD DEV TYPE VLV LATCH PORT DATE 6 3107 3022 0 MMG DMY RK 0 11/18/01 5 3636 3551 0 MMG DOME RK 16 12/11/01 I I 4 5928 5762 31 MMG DONE RK 16 12/11/01 3 6929 6515 42 MMG DMY RK 0 11/18/01 Minimum ID = 3.725" @ 9925' 2 8309 7506 46 MMG DOME RK 16 11/18/01 4-1/2" HES X N NIPPLE 1 9812 8565 54 KBG-2 SO BK 22 07/30/07 PERFORATION SUMMARY REF LOG: SWS VISION RESISTIVITY ON 11/10/01 9142' H9-5/8"X 7"BKR ZXP PKR, ID=6.270" ANGLE AT TOP PERF:77 @ 10464' 1LyJ Note:Refer to Production DB for historical perf data 9155' -I9-5/8"X 7"BKR HMC HGR, ID=6.270" SIZE SPF INTERVAL Opn/Sqz DATE 2-1/2" 4 10464- 10548 0 11/16/01 2-1/2' 4 10600- 10674 0 11/16/01 2-1/2' 4 12897- 13299 0 11/16/01 9-5/8"MILLOUT WINDOW 2-1/2' 4 13404- 13535 0 11/16/01 932T-9343' (OFF WHIPSTOCK) 2-1/2' 4 13750- 14128 0 11/16/01 2-1/2' 4 14170-14305 0 11/16/01 2-112' 4 14335- 14380 0 11/16/01 9871' H4-112"HES X NIP, ID=3.813" 2-1/2" 4 14595-14710 0 11/16/01 2-1/2' 4 14725- 14785 0 11/16/01 �\ 9881' —17"X 4-1/2"BKR S-3 PKR,ID=3.875" 4; ` 9905' H4-1/2"HES X NIP, ID=3.813" MEM9925' H4-1/2"HES XN NIP, ID=3.725" 1V9V•'V�•�V�tlVff, i 9937' H4-1/2"WLEG, ID=4.00" ...MOW • 9-5/8"CSG,47#,L-80, ID=8.681" -J I 10121' ���������������������� ` ` 12711' —14-1/2"x 20'MARKER JT 4-1/2"TBG,12.6#, 13-CR-80, .0152 bpf, ID=3.958" H 9936' ` 7"X 4-1/2"BKR ZXP PKR/HGR, ID=4.34" H 9933' ` 7"LNR,26#, L-80, .0383 bpf, ID=6.276" H 10085' ` ` PBTD H 14803' • 1 112"LMR, 12.6#, LSQ, Q153 bpf,'D-3.968" 14892' I DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04123/89 ORIG COMPLETION 04/01/06 JRP/PJC GLV C/O WELL: W-21A 10131/90 RWO 08/04/07 DTR/SV GLV C/O(07/30/07) PERMIT No:'2011110 11118/01 RIG SIDETRACK AR No: 50-029-21929-01 12/11/01 ?/TLP GLV CHANGES SEC 21,T11 N,R12E,626'SNL&1180'WEL 12/28/01 CI-ITP CORRECTIONS 06/25/03 KSB/KK SAFETY NOTE REVISION BP Exploration(Alaska) TREE= 4-1/16"McEVOY S NOTES: 4-1/2"CHROME TBG. WELL WELLHEAD= ACTUATOR= McEVOYBAKERVI-2 . A L 1 & L1 -01 AN >70°@ 10370 &>90°@ 11056'. KB.ELEV= 82.72' Proposed CTD Laterals BF.ELEV= 54.46' KOP= 4900' Max Angle= 97 @ 12645' Datum MD= 10300' I ' 2209' H 4-1/2"HES X NIP, ID=3.813" Datum TVD= 8800'SS 13-3/8"CSG,68#,L-80, ID=12.415" — 2710' GAS LIFT MANDRELS ST MD TVD DEV TYPE VLV LATCH: PORT DATE 6 3107 3022 0 MMG DMY RK 0 11/18/01 5 3636 3551 0 MMG DOME RK 16 12/11/01 L4 5928 5762 31 MMG DOME RK 16 12/11/01 Minimum ID = 3.80" @ 9925' 3 6929 6515 42 MMG DMY RK 0 11/18/01 4-1/2" HES XN NIPPLE 2 8309 7506 46 MMG DOME RK 16 11/18/01 1 9812 8565 54 KBG-2 SO BK 22 07/30/07 PERFORATION SUMMARY REF LOG:SWS VISION RESISTIVITY ON 11/10/01 ANGLE AT TOP PERF:77 @ 10464' Note:Refer to Production DB for historical perf data SIZE SPF INTERVAL Opn/Sqz DATE 2-1/2" 4 10464-10548 0 11/16/01 2-1/2" 4 10600- 10674 0 11/16/01 ` 1 9142' H 9-5/8"X 7"BKR ZXP PKR, ID=6.27 2-1/2" 4 12897- 13299 0 11/16/01 x[[ 2-1/2" 4 13404- 13535 0 11/16/01 9155' —9-5/8"X 7"BKR HMC HGR, ID=6.270" 2-1/2" 4 13750- 14128 0 11/16/01 2-1/2" 4 14170- 14305 0 11/16/01 9-5/8"MILLOUT WINDOW 2-1/2" 4 14335- 14380 0 11/16/01 9327'-9343' (OFF WHIPSTOCK) 2-1/2" 4 14595- 14710 0 11/16/01 2-1/2" 4 14725- 14785 0 11/16/01 I 9871' —14-1/2"HES X NIP, ID=3.813" 4-1/2"TBG, 12.6#, 13-CR-80, .0152 bpf, ID=3.958" IH 9936' S 9881' —7"X 4-1/2"BKR S-3 PKR,ID=3.875" 7"X 4-1/2"BKR ZXP PKR/HGR, ID=4.34" -1 9933' INil 9905' —4-1/2"HES X NIP, ID=3.813" 1. 9925' —4-1/2"HES XN NIP, ID milled to=3.80" 'i��i ✓x/10.0. l� A— 9937' H4-1/2"WLEG, ID=4.00" 4i/:%/0//�/. ` 2-7/8"L-80 slotted Liner —1 10480-117801 9-5/8"CSG,47#,L-80, ID=8.681" 10121' �i/�������/ , '——— W 21 '��ii — ———— _ AL1-01 __ _ 7"LNR,26#,L-80,.0383 bpf, ID=6.276" H 10085' 750 l \\\ I ? (4 lie „�� ` �N� N. N. 1”BKR RETRY WHIPSTOCK H 10472' I jAL1 I 2-7/8"L-80 slotted Liner —I 10520-118941 I 12711' —14-1/2"x 20'MARKER JT I 4-1/2"LNR, 12.6#,L-80, .0152 bpf, ID=3.958" — 14892' tij/i PBTD H 14803' DATE REV BY COMMENTS DATE REV BY COMMENTS PRUDHOE BAY UNIT 04/23/89 ORIG COMPLETION -04/01/06 JRP/PJC GLV C/O WELL: W-21A 10/31/90 RWO \08/04/07 DTR/SV GLV C/O(07/30/07) PERMIT No: 11/18/01 RIG SIDETRACK 02/05/10 MSE PROPOSED CTD LATERALS API No: 50-029-21929-0 12/11/01 ?/TLP GLV CHANGES SEC 21,T11 N,R12E,626'SNL&1180'WEL 12/28/01 CH/TP CORRECTIONS 06/25/03 KSB/KK SAFETY NOTE REVISION BP Exploration (Alaska) . N - Oo 0 0 o CO m N o 0 0 0 0N. NI I o v M o 0 o co o C 0 0 0 0 0 a 1O O I- O O O V M O O O O OMINIMMule 7 co co co Ma) 0) a) 0) 0) m CO m=Wu. -- o Z N 1 .1 CO NI U) a0 M M co (O CO O U) N- CO N U) O O M 0) U) 7 N CO CO U) CO M U) CO 1- O N CO N CO N- U) U, 0) co O O M 7 (0 (0 (O CO (0 U) O N M m O Q CO CO 0O N. N- N- N- N- 00 0) ON CO U W W U s- s- s- 0) 0) OJ N N u! 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C L 3`` ‘IIIo > R U O) C (0 E Q 401 01 N ! 3 i • BPPASSPORT BAKER G S Travelling Cylinder Report 0 bp 1NTEQ Company: North America-ALASKA-BP Local Co-ordinate Reference: Well W-21 Project: Prudhoe Bay TVD Reference: Mean Sea Level Reference Site: PB W Pad MD Reference: W-21A @ 81.56ft(Nabors 9ES) Site Error: O.00ft North Reference: True Reference Well: W-21 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan 6,W-21 AL1 Database: EDM.16-Anc Prod-WH24P Reference Design: Plan 6 Offset TVD Reference: Offset Datum Summary Reference Offset Centre to No-Go Allowable Measured Measured Centre Distance Deviation Warning Site Name Depth Depth Distance (ft) from Plan Offset Well-Wellbore-Design (ft) (ft) (ft) (ft) PB W Pad Plan W-202-Plan W-202 OBd-Plan#6 W-202 0 Out of range Plan W-202-Plan W-202L1 OBc-Plan#6 W-202 Out of range Plan W-202-Plan W-202L2 OBa-Plan#6 W-202 Out of range Plan W-219-Plan W-219-Plan#4 W-219 Out of range W-15-W-15-W-15 Out of range W-15-W-15A-Plan#7 Out of range W-15-W-15A-W-15A Out of range W-15-W-15PB1 -W-15PB1 Out of range W-15-W-15PB2-W-15PB2 Out of range W-16-W-16-W-16 Out of range W-16-W-16A-W-16A Out of range W-16-W-16APB1 -W-16APB1 Out of range W-17-W-17W-17-W-17-W-17 Out of range W-17-W-17A-W-17A Out of range W-18-W-18-W-18 Out of range W-19-Plan W-19B-Plan#13 W-19B Out of range W-19-Plan W-19BL1 -Plan#11 W-19BL1 Out of range W-19-Plan W-19BL1PB1 -Plan#4 W-19BL1PB1 Out of range W-19-W-19-W-19 Out of range W-19-W-19A-W-19A Out of range W-19-W-19AL1 -W-19AL1 Out of range W-19-W-19AL1 PB1 -W-19AL1 PB1 Out of range W-19-W-19AL1 PB2-W-19AL1 PB2 Out of range W-20-W-20-W-20 Out of range W-200-W-200-W-200 Out of range W-200-W-200PB1 -W-200PB1 Out of range W-201 -W-201 -W-201 Out of range W-21 -Plan 6,W-21AL1-01 -Plan 6 10,525.00 10,525.00 0.04 0.37 -0.32 FAIL-Major Risk W-21 -W-21 -W-21 Out of range W-21 -W-21A-W-21 A 10,475.00 10,475.00 0.00 0.57 -0.48 FAIL-Major Risk W-212-W-212-W-212 Out of range W-212-W-212-W-212 wp05 Out of range W-22-W-22-W-22 11,150.00 9,740.00 1,365.15 131.59 1,238.60 Pass-Major Risk W-24-W-24-W-24 Out of range W-25-W-25-W-25 Out of range W-25-W-25A-W-25A Out of range W-27-Plan W-27B-Plan#1 Out of range W-27-W-27-W-27 Out of range W-27-W-27A-Plan#3 Out of range W-27-W-27A-W-27A Out of range W-29-W-29-W-29 Out of range W-30-W-30-W-30 Out of range W-31 -W-31 -W-31 Out of range W-31 -W-31A-W-31A Out of range W-32-W-32-W-32 Out of range W-32-W-32A-W-32A Out of range W-32-W-32APB1 -W-32A OH Sidetrack Out of range W-32-W-32APB1 -W-32APB1 Out of range W-56-W-56-W-56 Out of range CC-Min centre to center distance or covergent point,SF-min separation factor,ES-min ellipse separation 2/17/2010 2:20:40PM Page 3 of 7 COMPASS 2003.16 Build 71 v ;4121.11 G •m Y O may: u ON at•II, r a '• _ F. l� = 0 14 == ,: m a d O c I. CO J h i. N N y IA ell�tl:'ir�rr 1•M7 I- Zol :71L------7 /7 I �, a v Co' s D �o g L u $ Q. Y U III at c 4 • Yl 7 ( U W Q .. E 4 u1 s N U U I `F N �; 1 , m� 111 1111 O C7, 2 " U L J Q _ 0 _1 !b o awl/along sec j N 7, U I z Q Y Hi 2 N O II. SII m = • t ° I' m 114, ® CO U wVitVc I Ia Zv _ • : 0 1 1.II AI iC mf• • _a•• W ,2 _ IlLige Z �, J mYa :3' O (5u) U m m y i U N C O2 WOQ s f:• a f..• •— •: VV Q °wU LLaa W o ■ • ` O Y ` y _ f u • e. u U MN cc W • • s0 ill 1111 en �Ce c � 11 I , • :••• P dill" i U U iii o Ili U N d & / 4— V * :, m 4,4 0 2 el • n° fO tie JI i iY e. I T Q ' II IIQ I 1MIle ■0. 2 2 V+ W � 2 Or- Ct V0. ( t,i O O U z2 iffil O I: O U LL u r m cU Q-� Z Uao ULL a 41 r II sEU V 1. Int cc 2 m1° U A Z IIII MC E3 8 i 1101 II II ■ ii J MILiall a IIa x x Land Administration System Page 1 of� \laska Department of Natural Resources Alaska DNR Case Summary File Type: ADL File Number: 47451 See Township,Range,Section and Acreage? Yes No ; New Search 411, File: ADL 47451 Search for Status Plat Updates As of 09/30/2011 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E.BENSON BL ATIN:N:LAND MANAGER-ALASKA ANCHORAGE AK 995196612 Case Type:784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status:35 ISSUED Status Date: 09/30/1969 Total Acres: 2560.000 Date Initiated:08/10969 1969 Office of Primary Responsibility:DOG DIV OIL AND GAS Last Transaction Date:12/04/2006 Case Subtype: NS NORTH SLOPE Last Transaction:AA-NRB ASSIGNMENT APPROVED Meridian: U Township: onN Range: 012E Section: 13 Section Acres:640 Search Plats Meridian: U Township: onN Range: 012E Section: 14 Section Acres:640 Meridian: U Township: oiiN Range: 012E Section: 23 Section Acres:64o Meridian: U Township: onN Range: o12E Section: 24 Section Acres:64o Legal Description 08-11-1969***SALE NOTICE LEGAL DESCRIPTION*** C23-036 TiIN-Ri2E-UM GENERAL 13 640.00 ALL 14 640.00 ALL 23 640.00 ALL 24 640.00 ALL TOTAL ACRES-2560.00 04-01-1977****UNITIZED AND LEASE LEGAL DESCRIPTION******** ENTIRE LEASE COMMITTED TO PRUDHOE BAY UNIT PRUDHOE BAY UNIT TRACT56 T.11 N.,R.12 E.,UML4TMERIDIAN,ALASKA SECTION13:ALL,640.00 ACRES; SECTION 14:ALL,640.00 ACRES; SECTION 23:ALL,640.00 ACRES; SECTION 24:ALL,64o.0oACRES. CONTAINING 2,560.00 ACRES,MORE OR LESS. 04-01-1977****PARTICIPATING AREA LEGAL DESCRIPTION***** LEASE COMMIT?ED IN PART TO OIL RIM AND GAS CAP PARTICIPATING AREAS http://dnr.alaska.gov/projects/las/Case Summary.cfrn?FileType=ADL&FileNumber=4745... 9/30/2011 Land Administration System Page 1 off l 0 Alaska I)cr:Irimtnt of Natural Resources Alaska DNR Case Summary File Type: ADL File Number: 28263 See Township,Range,Section and Acreage? Yes No 1 New Search Pile: ADL 28268 M P Search for Status Plat Updates As of 09/30/2011 Customer: 000107377 BP EXPLORATION(ALASKA)INC PO BOX 196612/900 E.BENSON BLATTN:LAND MANAGER-ALASKA ANCHORAGE AK 995196612 Case Type:784 OIL&GAS LEASE COMP DNR Unit: 780 OIL AND GAS File Location:DOG DIV OIL AND GAS Case Status:35 ISSUED Status Date: 08/11/1965 Total Acres: 2560.000 Date Initiated:05/28/1965 Office of Primary Responsibility:DOG DIV OIL AND GAS Last Transaction Date:10/06/2009 Case Subtype: NS NORTH SLOPE Last Transaction:CHNGTEXT CHANGE LEGAL TEXT Meridian: U Township: o11N Range: o12E Section: 15 Section Acres:640 Search Plats Meridian: U Township: o11N Range: o12E Section: 16 Section Acres:64o Meridian: U Township: o11N Range: o12E Section: 21 Section Acres:64o Meridian: U Township: o11N Range: o12E Section: 22 Section Acres:640 Legal Description 05-28-1965***SALE NOTICE LEGAL DESCRIPTION*** C14-59 T11N,R12E,UM 15,16,21,22 2560.00 11-28-1969 SEGMENT 1 T11N,R12E,UM SECTION 15:640 ACRES SECTION 16:640 ACRES CONTAINING 1280 ACRES,MORE OR LESS. SEGMENT 2-LANDS ASSIGNED T11N,R12E,UM SECTION 21:640 ACRES SECTION 22:640 ACRES CONTAINING 1280 ACRES,MORE OR LESS. 04-01-1977 ****UNITIZED AND LEASE LEGAL DESCRIPTION************ ENTIRE LEASE COMMITTED TO PRUDHOE BAY UNIT PRUDHOE BAY UNIT TRACT 55 T. 11 N.,R.12 E.,UMIAT MERIDIAN,ALASKA SECTION 15:640 ACRES SECTION 16:640 ACRES http://dnr.alaska.gov/projects/las/Case Summary.cfin?FileType=ADL&FileNumber=2826... 9/30/2011 OVERSIZED DOCUMENT INSERT This file contains one or more oversized documents. These materials may be found in the original hard file or check the parent folder to view it in digital format. TRANSMITTAL LETTER CHECKLIST WELL NAME f ,U a f ?/, / PTD# a?I,f..fI ✓ Development Service Exploratory Stratigraphic Test Non-Conventional Well FIELD: ��y4 /DE £ 4/ POOL: .tv'j ', ,4DE"7379/ 0iz 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 y'64/ Ps Av?/� , / (If last two digits in Permit Not///O ,API No. 50-a 29. ?/9g9O/-d0• API 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 produce I 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 All dry ditch sample sets submitted to the Commission must be in SAMPLE no greater than 30' sample intervals from below the permafrost or from where samples are first caught and 10' sample intervals through target zones. Non-Conventional Please note the following special condition of this permit: Well production or production testing of coal bed methane is not allowed for (name of well) until after (Company Name) has designed and implemented a water well testing program to provide baseline data on water quality and quantity. (Company Name) must contact the Commission to obtain advance approval of such water well testing program. 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