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213-025
Image Project Well History File Cover Page XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of file. 1.3 - 0a5- Well History File Identifier Organizing(done) ❑ Two-sided 11 11/111 III IIIII ❑ Rescan Needed I I IIIIII 111111111 RESC DIGITAL DATA OVERSIZED (Scannable) //olor Items: ❑ Diskettes, No. ❑ Maps: �7iGreyscale Items: ❑ Other, No/Type: ❑ Other Items Scannable by IVT a Large Scanner ❑ Poor Quality Originals: OVERSIZED (Non-Scannable) ❑ Other: ❑ Logs of various kinds: NOTES: ❑ Other:: BY: Date: aJ /i /s/ Project Proofing II I111111 IIIII BY: ACP Date: c ` /s/ 'V Scanning Preparation 3 x 30 = 90 + = TOTAL PAGES q O BY: CD Date: capicp (Count does not include cover sheet) 9. /s/ Production Scanning 1 1 Stage 1 Page Count from Scanned File: qi (Count does include cover eet) Page Count Matches Number in Scanning Preparation: YES NO BY: Date: / '/i Li. /s/ {'f� f Stage 1 If NO in stage 1, page(s) discrepancies were found: YES NO BY: Maria Date: /s/ Scanning is complete at this point unless rescanning is required. II II II II III II I I III ReScanned II 11111111111 11 111 BY: Maria Date: /s/ Comments about this file: Quality Checked II llhIIIIIIIIIIIIl O I M G O O 1 < ii N •tcr _co ti ° M o .A�f IL x Z y I >- >- >- 0 I • o °o) U J - ai N O T/�-r ' N L N 0 a a,a) o aC Q p I y E- y O 0 p a- Z 7 O o t L O IT. U co U r U d m Q y a) a o m 2 o c ca X m a o o co U 4 � ( U U J . Ce J C Z U U O ° c O i ,U Z Z v y o E o / Y y a ; n � °) m Z z E / as 0�..r yam >- >- > g J U > O __ <o > 0 "O V as/ y 0 o O Z O 8 C 16 co co co �m£ Q N N E co W co d N N o Z cc p J m mU l0 to ,� u N m m ag a W w aci aa)) 'o 0 ui co J 2 2 a a a) m co a U m o 1 OUO O E E Z �� � _ d 1�0 (n 0 0 O N J C7) co O v) O) a) NM- 0 E .-. 1 J a) 0 <n o / w c 2 0 0 CL • el c 1Z1 0 Et . 0 0 o l , SIn r- v ON a a) u) ..a- v co E a Q N ii N V U m �w c / Z d o U o 0 o >- i E ...Q d' Z 0 co W N / Z O O O i- M ° a) p " O Z F) W J U �a N m N a' !C Z' N CD y o a a) CO ■T 0 Ce J0) N N C O A E W CO0 Q `.3 c m N .°.co yr D p o co E c O �"" a 'y 1 X c - a a °I °° m O Q Z E Z / y U 121 "it) V 0) E o 2 o ca Z 31 U a) I 2 N N co co a) d N 3 O C E!O O c Q I N / 7 Co I Z Z a) 0 ? N rn Z a) m Z y (1) a) 7 >- >- >- O) n n f./) € 0 W / g/ M N J y d O) O) rn w N w` U) d u u i1 w >- L.- N 2 p 0 ° W 0 Z N N N S W �O o y 0 Q ° € a a) a' a w = ai Z 12 „ 9 ! R ZO a) N ■Y W a)ce O N D O U C 5).0—_ 0 N z ~ C Z �c io O O 1 W w d d i a) Q O ° 1 Q O o 'a+ C. `J Q a) J 0 O a '=D O a N y a 2 W Q aa. ° o c ),i o o a Z o ° a°i O o a) d C o 1 J o F- � W W___,--3 0 a. 0 0 0 CC O , M_ O O 9 ,o a w 0 N z Q N c) 4 o IJ 1 U O '111 z i r �/ co• i° I to ii Q g G O 0 U W o IX -J O. 1 W W J U CO o 1 Z 8 Q Es _ N I J d o `° ! Om I �e,.) �c o • N N 1 O a ca 0 U N W c N J Q n a I-- N E M O G N m m Ito M o o ra a ° °' ,\ Q Oz a Q E v a :� z m O , rn 1 ' 'AI 1 m G d %- 3 N 41 N .> _ a. D I a 8 E 0 I o Q c7 E 2 O 1 0 McMains, Stephen E (DOA) From: Mallery,Joshua <Joshua.Mallery@BP.com> Sent: Tuesday, August 20, 2013 8:01 AM To: McMains, Stephen E (DOA) Subject: FW: Missing Data: PTD: 213-025, PBU Z-71 Steve, The included email chain indicates that the "missing data" was actually delivered on 4/26/2013 to the AOGCC. Thanks, Joshua Mallery 907.564.5545 (Office) 907.227.2035 (Cell) From: Steger, Analisa (Wipro Technologies) Sent: Tuesday, August 20, 2013 7:54 AM To: Douglas, David W (Wipro); Cedillo, Gerardo Cc: Mallery, Joshua; Echeto, Hector (Schlumbergr) Subject: RE: Missing Data: PTD: 213-025, PBU Z-71 Good Morning All, It is confirmed that the Directional Survey and TVDss was delivered to the AOGCC on 04/26/2013 per Schlumberger transmittal for Z-71.The Azimuth log would be included in both of those forms. Thank you and if anything else is needed,please feel free to ask. Have a great day and week! Analisa 'lnali&a StggRr pet rotecl)ni( l Data ('eager Wipro Technologies; I3P.Exploration (Alaska) 907-564-5439 From: Douglas, David W (Wipro) Sent: Monday, August 19, 2013 9:13 AM To: Cedillo, Gerardo Cc: Mallery, Joshua; Echeto, Hector (Schlumbergr); Steger, Analisa (Wipro Technologies) Subject: RE: Missing Data: PTD: 213-025, PBU Z-71 Gerardo, Yes, I can help coordinate this with Hector. I think it has been delivered by Hector but Steve McMains is new to this role and he is not aware that there is no such thing as an AZI log and that the 10-407 should not have documented it that way. In addition, the AZIMUTH data was delivered on the TVDss log and in paper and digital formats on the directional survey. Analisa, Hector and I will verify that the items I listed really were provided and we will report back so that you or Joshua can point Steve to the items he already has (again I will confirm it). 1 We do have an issue when the Wells Group Drilling TA's just write down on the Completion Report"the planned logging program" rather than the actual (i.e what was really run). The AOGCC begins asking for logs that were not run if the actual is not equal to the plan. I will work this out with Joe Lastufka but we may circle back if he needs and efficient method to record what was actually run. Using a term like AZI log is not a good practice and perhaps we need whoever is writing it down that way on the "planned" logging program should change the terminology too. Again, I will work this with Joe first. David Douglas (Wipro) BP Alaska Data Management Site Lead Petrotechnical Data Center Office: 907.564.5929 Mobile: 907.887.6339 dougladw@thp com From: Cedillo, Gerardo Sent: Monday, August 19, 2013 8:48 AM To: Douglas, David W (Wipro); Echeto, Hector (Schlumbergr) Cc: Mallery, Joshua Subject: FW: Missing Data: PTD: 213-025, PBU Z-71 Hector/Dave Good morning Can we find out how can we avoid this to happen for the next wells Dave Should I send the digital file myself or you can take it from here? Rgds From: Mallery, Joshua Sent: Monday, August 19, 2013 8:25 AM To: Cedilla, Gerardo Subject: FW: Missing Data: PTD: 213-025, PBU Z-71 Gerado, Can you help me out on as to what Steve is asking for? Thanks, Joshua Mallery 907.564.5545 (Office) 907.227.2035 (Cell) From: McMains, Stephen E (DOA) [mailto:steve.mcmains©alaska.gov] Sent: Monday, August 19, 2013 8:10 AM To: Mallery, Joshua Subject: Missing Data: PTD: 213-025, PBU Z-71 Joshua, Block 21 of the well completion report said a AZI log was run and AOGCC didn't receive it as of today. Could you please send that log(paper and digital)to us. 2 Steve 793-1233 3 Hunt, Jennifer L (DOA) From: Lastufka, Joseph N [Joseph.Lastufka @bp.com] Sent: Monday, June 24, 2013 1:08 PM To: Hunt, Jennifer L (DOA) Subject: PBU Z-71 / PTD#213-025 Hi Jennifer, Please reference the following well: Well Name: PBU Z-71 Permit#: 213-025 API #: 50-029-23484-00-00 Date of Test: 6/23/13 Type of Test: IPT (Initial Production Test) Choke Size: 96 Choke Unit: Deg Production Method: Gas Lift Duration (Hours Tested): 4 Top Reference (Top Perf MD): 11159' Bottom Reference (Bottom Perf MD): 13061' Tubing Flowing (Pressure): 280 Casing Pressure: 1620 Total Test (Rate f/0, W, G): 141 /450 /70 24-Hour Rate (0, W, G): 844/2700 /418 Gravity (Oil, API): 23.7 GOR (Gas-Oil Ratio): 495 This well began Production on Method of Operations on this date: June 19, 2013 1 WED STATE OF ALASKA MAY 2 0 2013 ALASKA OIL AND GAS CONSERVATION COMMISSION WELL COMPLETION OR RECOMPLETION REPORT AND LO `"" T) "C la. Well Status: ®Oil ❑Gas ❑SPLUG ❑Other ❑Abandoned ❑Suspended 1b. Well Class 20AAC 25.105 2OAAC 25.110 ❑Exploratory ❑Stratigraphic ❑GINJ ❑WINJ ❑WAG ❑WDSPL ❑Other No.of Completions One ®Development ❑Service 2. Operator Name: 5.Date Comp.,Susp.,or Aband.: 12. Permit to Drill Number: BP Exploration(Alaska) Inc. - 4/22/2013 • 213-025 • 3. Address: 6.Date Spudded: 13. API Number: P.O. Box 196612,Anchorage,Alaska 99519-6612 3/28/2013 50-029-23484-00-00 ' 4a. Location of Well(Governmental Section): 7.Date T.D.Reached: 14. Well Name and Number: Surface: 4/17/2013 • PBU Z-71 ` 4431' FSL,2497' FEL, Sec. 19,T11N, R12E, UM 8. KB(ft above MSL): 96.6' 15.Field/Pool(s) Top of Productive Horizon: 324'FSL,886'FWL, Sec.20,T11N, R12E, UM GL(ft above MSL): 56' Prudhoe Bay/Prudhoe Bay Total Depth: 9.Plug Back Depth(MD+TVD) 1703'FNL,638'FWL, Sec.29,T11N, R12E, UM 13190' 9052' 4b. Location of Well(State Base Plane Coordinates,NAD: 10.Total Depth(MD+TVD) 16. Property Designation: Surface: x- 600178 y- 5959240 Zone- ASP4 ' 13205' 9054' ' ADL 028262&047453 ' TPI: x- 603632 y- 5955180 Zone- ASP4 11.SSSV Depth(MD+TVD) 17. Land Use Permit: Total Depth:x- 603418 y- 5953149 Zone- ASP4 None 18. Directional Survey: 0 Yes ❑No 19.Water depth,if offshore: 20. Thickness of Permafrost(ND): (Submit electronic and printed information per 20 AAC 25.050) N/A ft MSL 1823' 21.Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): 22.Re-Drill/Lateral Top Window MD/TVD: DIR/GR/RES, DIR/GR/RES/NEU/DEN, DIR/GR/RES/AZI/NEU/DEN N/A 23. CASING,LINER AND CEMENTING RECORD SETTING DEPTH MD SETTING DEPTH ND HOLE AMOUNT CASING WT.PER FT. GRADE TOP BOTTOM ToP BOTTOM SIZE CEMENTING RECORD PULLED 20" 94# H-40 41' 108' 41' 108' 260 sx Arctic Set(Approx.) 9-5/8" 40# L-80 41' 3364' 41' 3170' 12-1/4" 2057 sx LiteCrete, 372 sx Class'G' 7" 26# L-80 39' 10902' 39' 8787' 8-3/4" 703 sx LiteCrete, 102 sx Class'G' 4-1/2" 12.6# 13Cr80 10737' 13203' 8636' 9054' 6-1/8" Uncemented Slotted Liner,Swell Packers 24. Open to production or injection? 0 Yes ❑No 25. TUBING RECORD If Yes,list each interval open SIZE DEPTH SET(MD) PACKER SET(MD/ND (MD+TVD of Top&Bottom;Perforation Size and Number): ( ) _ ( ) 4-1/2"Sliding Sleeves w/Swell Packers 4-1/2", 12.6#, 13Cr85 10746' 10623'/8533' 26. ACID,FRACTURE,CEMENT SQUEEZE,ETC. 11159' 8989' • 13061' 9030' WAS HYDRAULIC FRACTURING USED DURING COMPLETION?❑Yes 0 No 11237' 9032' 11445' 9082' ; -' DEPTH INTERVAL(MD) AMOUNT AND KIND OF MATERIAL USED 11709' 9050' ,,;' 12012' 9008' w Z1 ^. 2375' Freeze Protect w/74 Bbls Diesel 12251' 8978' �.5i = ' , . 12512' 8956' �n. 12616' 8953' 12918' 9003' 27. PRODUCTION TEST Date First Production Method of Operation(Flowing,Gas Lift,etc Not on Production N/A Date of Test Hours Tested Production For OIL-BBL: GAS-MCF: WATER-BBL: CHOKE SIZE: GAS-OIL RATIO: Test Period , 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? ❑Yes 0 No Sidewall Core(s)Acquired? ❑Yes 0 No If Yes to either question,list formations and intervals cored(MD+ND 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.p71. None RBDMS MAY 2 0 2013, Form 10-407 Revised 10/2012 CONTINUED ON REVERSE liLF t//57 13 final Only 29. GEOLOGIC MARKERS(List all formations an kers encounter 30. FORMATION TESTS NAME MD ND Well Tested? ❑Yes ®No Permafrost Top 41' 41' If yes,list intervals and formations tested,briefly summarizing test results. Attach separate sheets to this form,if needed,and submit Permafrost Base 1919' 1864' detailed test information per 20 AAC 25.071. Ungu 3339' 3147' Schrader Bluff N 5141' 4043' None Schrader Bluff 0 5458' 4586' Base of Schrader Bluff 6063' 4948' HRZ 8426' 6541' Kalubik 8712' 6800' Kuparuk C 8723' 6810' LCU/Kuparuk A 8767' 6850' Miluveach 8779' 6861' Kingak 9518' 7534' Sag River 10905' 8789' Shublik 10938' 8819' Eileen 11063' 8922' Sadlerochit/Zone 4B 11111' 8958' Zone 4B/Base of Eileen(Invert) 12547' 8954' Base of Eileen/Zone 4B(Revert) 12604' 8953' Zone 4B/Base of Eileen(Invert) 12662' 8956' Sadlerochit/Zone 4B(Revert) 12853' 8990' Formation at Total Depth: Sadlerochit/Zone 4B 12853' 8990' 31.List of Attachment: Summary of Daily Drilling Reports,Well Schematic Diagram,Surveys 32. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact: Joshua Malle 564-5545 Email: Joshua.Mallery@bp.com Printed Name: Joe Lastufka Title: Drilling Technologist Signature: J ., Phone 564-4091 Date:5 I/7 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-Alternating-Gas Injection,Salt Water Disposal,Water Supply for Injection, Observation,or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool completely segregated. Each segregated pool is a completion. Item 4b: TPI(Top of Producing Interval). Item 8: The Kelly Bushing and Ground Level 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 10/2012 Submit Original Only TREE= DRY HOLE '--/AELI-EAD= FMC 7 4 SAFE.. NOTES: WELL ANGLE>70 @ 11291'*** ACTUATOR= ELE(,TRIC CHROME TBG& LNR*** INITIAL KB.ELEV 9624' I - NTIAL.BF.ELEV 40.8' KOP= 203' I 1994' -F- 4-1/2"HES X NP,D=3.813" Max Angle= 99°@ 11545' ' Datum MD= 11030' Datum TVD= 8800.SS GAS LFT MANDRELS ST M3 ND DEV TYPE VLV LATCH PORT DATE 20"X 30"INSULATE CONDUCTOR H 108' ` 7 3060 2896 26 KBG4 DMY BK 0 04/21/13 94#,H-40,D=19.124" 7 6 5128 4396 55 KBG4 DAY BK 0 04/21/13 5 6486 5194 56 KBG4 OCR BEK 0 04/21/13 9-5/8"CSG,40#,L-80 BTC,D=8.835" H 3364' I. 4 7767 5984 42 KBG4 DMY BK 0 04/21/13 3 8714 6802 25 KBG4 DMY BK 0 04/21/13 . 2 9576 7587 26 KBG4 DAY BK 0 04/21/13 1 10482 8408 27 KBG4 DMY BK 0 04/21/13 I II 10558' --4-1/2"HES X NP,D=3.813" Minimum ID =3.813" @ 1994' • I 10593' 41/2"SGM NOPG-C SINGLE DROP 4-1/2" HES X NIPPLE GAUGE,D="3.864 I5 x 10623' -7"X 4-1/2"HES TNT PKR ID=3.856" I 1 10657' -{4-1/2"HES X NP,D=3.813" I I 10733' -14-1/2"FES X NP,D=3.813" 10737' --17'X 5"BKR FRD-E ZXPN LTP,D=4.32" I 4-112"TBG, 12.6#, 13CR-85 VAM TOP, - 10744' \ ` 10746' H4-1/2"WLEG,D=4.00 .0152 bpf,D-3.958" --{ELMD TT NOT LOGGED 7"CSG,26#,L-80 VAM TOP HC H 10902' 10761' -17'X 5"BKR FLEX-LOCK HGR,D=4.36" I .0383 bpf.D=6.276 ■ 10771' -I5"X4-1/2"XO FIN,D=3.910" I HES SWELL PACKERS e..... 4-112"HES"XD"SLD SLV,ID=3.813" NO SIZE TOP DEPTH MN D •to- NO DEPTH 0/C DATE 10 4-1/2" 11095 3.958" "=°_'=• 10 11159 C 04/18/13 9 4-1/2" 11172 3.958" .:°�.:" 9 11237 C 04/18/13 8 4-1/2" 11251 3.958" 1111__ 8 11445 C 04/18/13 7 4-1/2" 11843 3.958" mum NI 7 11709 C 04/18/13 6 4-1/7 12146 3.958" *=°_•=• 6 12012 C 04/18/13 NI iim IN 5 4-1/7 12303 3.958" _ 5 12251 C 04/18/13 4 4-1/2" 12363 3.958' '-� _' 4 12512 C 04/18/13 3 4-1/2" 12525 3.958' w No El 3 12616 C 04/18/13 2 4-1/2" 12749 3.958" 2 12918 C 04/18/13 1 4-1/2" 12951 3.958" 1 13061 C 04/18/13 III=NO 111•_. 13080' -I4-1/2"BKR SHFT TOOL V ERFICATION SUB,ID=3.88" 4-1/2"LNR,12.6#,13CR-80 HYD 521, -I 13106' 13103'J-14-1/2"BKR ISOLATION VALVE,D=1.250" .0152 bpf,D=3.958" /I 13106' -I4-1/2"X 3-1/2"XO,ID=2-95" PBTD H 13190' _. :. 13117' -{3-1/2"HES SWELL PKR,D=2.997 4-1/2"LNR 12.6#,L-80 IBT,.0152 bpf,D=3.958" H 13203' .-.�. 13180' H3-1/2"X 4-1/2"XO,ID=2.992" 4.:4.:4 DATE REV BY COMETS DATE REV BY COM/I:NTS PRUDHDEBAY UMT- 04/22/13 D-25 IMTIAL COMPLETION WELL: Z-71 04/23/13 PJC DRLG HO CORRECTONS FERMT No: 2130250 04/26/13• PJC DRLG DRAFT CORRECTIONS API No: 50-029-23484-00 04/29/13 JRD/PJC FINAL APPROVAL SEC. 19,T11 N,R12E,849'FNL 8 2456'FWL BP Exploration(Alaska) BP AMERICA LOT / FIT Summary Well Name: Z-71 Surface Leak Off Test Test Test Depth Test Depth AMW Pressure Pressure EMW Date Type (TMD-Ft) (TVD-Ft) (ppg) (psi) (BHP) (psi) (ppg) 04/03/13 LOT 3,364.00 3,170.00 9.00 810.00 2,292.08 13.92 04/14/13 FIT 10,902.00 8,786.67 8.60 1,782.00 5,707.48 12.50 Page 1 of 1 North America-ALASKA-BP Page 1 of 24 Operation Summary Report Common Well Name:Z-71 AFE No • Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 3/25/2013 06:00 - 08:00 2.00 MOB P PRE SECURE CELLAR, PREP DERRICK TO LAY OVER,RAISE C-SECTION 08:00 - 12:00 4.00 MOB P PRE LOWER CATTLE CHUTE,WALK CASING SHED OUT.WALK CASING AND POWER COMPLEXES OUT AND STAGE W/SOW 12:00 - 15:00 3.00 MOB P PRE PJSM, LAY OVER DERRICK AND SECURE SAME, 15:00 - 18:00 3.00 MOB P PRE UNPIN PIPESHED AND WALKOUT,LOAD AND CONT MOVE W/SOW 18:00 - 00:00 6.00 MOB P PRE MOVE SUB AWAY FROM Z-66 WELLHOUSE, INSTALL JEEP AND MOVE SUB AND SPOT OVER Z-71 3/26/2013 00:00 - 07:00 7.00 RIGU P PRE RU ON Z-71 -RAISE DERRICK,WALK PIPESHED AND PIT COMPLEX INTO PLACE. 07:00 - 12:00 5.00 RIGU P PRE RAISE CATTLE CHUTE,WALK POWER COMPLEX INTO POSITION -WORK ON INTERCONNECTS -PREP DERRICK TO SCOPE 12:00 - 17:00 5.00 RIGU P PRE UNPIN TDS AND BRIDLE UP -PJSM,SCOPE DERRICK -RD SCOPING LINES AND BRACKETS - -INSTALL KELLY HOSE -CALIBRATE BLOCK HEIGHT,HOOKLOAD 17:00 - 00:00 7.00 BOPSUR P PRE ACCEPT RIG 17:00HRS 03/26/2013 DOYON 25 WELLZ-71 -NIPPLE UP RISER,ANNULAR DIVERTER -INSTALL DIVERTER LINE 3/27/2013 00:00 - 01:00 1.00 P PRE PRE SPUD MEETING WITH"D"CREW, 01:00 - 04:00 3.00 BOPSUR P PRE -CONT NIPPLE UP DIVERTER AND DIVERTER LINE -ABANDON RIG DRILL,WITH"D"CREW AND RIG PERSONNEL,HELD AAR. -ALL PERSONNEL ACCOUNTED FOR AND COMPLETE MUSTER 4 MIN 15 SEC. 04:00 - 10:00 6.00 RIGU P PRE PREPARE RIG FLOOR TO PU SINGLES OF 4" DP FROM PIPESHED,TORQUE PIPE TO 24K, MU TO SIDS AND STAND BACK 30 STANDS IN DERRICK 10:00 - 12:00 2.00 BOPSUR P PRE PERFORM DIVERTER FUNCTION TEST,RIG ACCEPTANCE,KOMMEY DRAWDOWN WITNESSED AND ACCEPTED BY AOGCC REP, LOU GRIMALDI -KOOMEY OPERATION!DRAWDOWN -KNIFE VALVE OPEN=16 SEC -ANNULAR CLOSED=33 SEC -15 SEC 200 PSI RECOVERY -51 SEC FULL 3000 PSI RECOVERY 12:00 - 13:00 1.00 BOPSUR ' P PRE TEST GAS,PVT,GAIN/LOSS ALARMS -WITNESSED AND ACCEPTED BYAOGCC REP LOU GRIMALDI 13:00 - 14:00 1.00 RIGU P PRE PRE SPUD MEETING WITH"A"CREW Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 2 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952-00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 14:00 - 14:30 0.50 I RIGU P PRE ABANDON RIG DRILL,WITH"A"CREW AND RIG PERSONNEL -ALL PERSONNEL ACCOUNTED FOR AND COMPLETE MUSTER 3 MIN 45 SEC.HELD AAR 14:30 - 15:30 1.00 RIGU P PRE BEGIN PU BHA#1 15:30 - 20:00 4.50 RIGU P PRE INSPECT DRLG LINE, -DECISION MADE TO SLIP/CUT 720'. -RECALIBRATE BLOCKS AND SCHLUMBERGER DEPTH CONTROL 20:00 - 22:00 2.00 RIGU P PRE PU BHA#1(BIT,MOTOR,STAB,UBHO,2EAXO) AND ORIENT SAME 22:00 - 23:00 1.00 RIGU P PRE PJSM,RU GYRO 23:00 - 00:00 1.00 RIGU P PRE FILL HOLE,PRESSURE TEST SURFACE EQUIPMENT AND LINES TO 3500 PSI 3/28/2013 00:00 - 00:30 0.50 RIGU N SFAL. 73.80 PRE TROUBLE SHOOT CUTTINGS TANK LINE PROBLEM,FROZEN UP SUPER SUCKER,CIO TRUCKS. ---------- _--------......--------- 00:30 - 01:00 0.50 RIGU P .- PRE RIH W/BHA#1,TAG ICE©75', CLEAN OUT TO BOTTOM OF CONDUCTOR @ 120' 01:00 - 12:00 11.00 DRILL P SURF DRILL 121/4"SURFACE HOLE.F/120'MD TO 505'MD(504'TVD) PUMP RATE 500 GPM,900 PSI ON BTM,700 PSI OFF BTM MW 8.6 IN/8.6 OUT -40 RPM,3 K TO ON/2 K TQ OFF 15 K WOB P/U=55 K,S/0=61 K,ROT=58K -AST=2.55, ART=2.61,ADT=5.16 -GYRO EVERY 90' 12:00 - 14:00 2.00 DRILL P SURF ATTEMPT POOH,WORK TIGHT HOLE a 440' MD,RUN BACK TO BTM©505'MD 14:00 - 15:00 1.00 DRILL P SURF PUMP OUT OF HOLE,W/500 GPM -BACK REAMED W/75 RPM,20/24 K TQ F/440' 410' -POOH W/PUMP ONLY 410'TO 92' -POOH 92'TO SURFACE ON ELEVATORS 15:00 - 16:00 1.00 DRILL P SURF PJSM,LD BHA#1,AND RD GYRO-DATA AND HES E-LINE 16:00 - 19:00 3.00 DRILL P SURF PU BHA#2,RR BIT#1. -PERFORM SHALLOW PULSE TEST TO 502 GPM 1140 PSI 19:00 - 19:30 0.50 DRILL P SURF RIH W/BHA#2, TIGHT HOLE @ 330'MD 19:30 - 20:30 1.00 DRILL P SURF MU TDS AND WASH/REAM 330'TO BTM 505' MD -450 GPM 550PSI -20 RPM -2/24K TQ -PUMP UP MWD SURVEY @ 361'TO CONFIRM WITH GYRO Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 3 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 20:30 - 00:00 3.50 DRILL P SURF DRILL 12 1/4"SURFACE HOLE F/505'MD TO 741'MD(738'TVD) 40 RPM,3 K TQ ON/1 K TQ OFF 20 K WOB -PUMP RATE 500 GPM,1050 PSI ON BTM, 940 PSI OFF BTM MW 8.8 IN/8.8 OUT P/U=55 K,S/O=61 K,ROT=58 K -AST=0.61, ART=2.02,ADT=2.63,TDT=7.79 -JAR HRS=2.63 -PUMP UP MWD SURVEY @ 522'TO CONFIRM WITH GYRO -RELEASE GYRO-DATA AND HES E-LINE @ 21:00HRS 3/29/2013 00:00 - 12:00 12.00 DRILL P SURF 'DRILL 12 1/4"SURFACE HOLE F/741'MD TO 1501'MD(1478'TVD) -40 RPM,3KTQON/2KTQOFF -26KWOB -PUMP RATE 550 GPM,1560 PSI ON BTM, 1370 PSI OFF BTM MW 8.8 IN/8.8 OUT -P/U=55 K,S/O=61 K,ROT=58 K -AST=3.05,ART=4.72,ADT=7.77,TOTAL BIT HRS=15.56 -JARS=10.40 12:00 - 17:30 5.50 DRILL P SURF DRILL 12 1/4"SURFACE HOLE F/1501'MD TO 1975'MD(1915'TVD) 40 RPM,5KTQON/2KTQOFF -25/30KWOB -PUMP RATE 550 GPM,1740 PSI ON BTM, 11525 PSI OFF BTM MW 9.2 IN/9.2 OUT P/U=88 K,S/0=89 K,ROT=86K -AST=1.59,ART=1.77,ADT=3.36,TOTAL BIT HRS=18.92 -JARS=13.76 17:30 - 18:30 1.00 DRILL P SURF ORIENTTOOLFACETOHIGHSIDEAND RECIPROCATE PIPE WHILE CIRC UNTIL SHAKERS CLEAN -550 GPM=1520 PSI -MUD WT 9.2ppg IN/OUT PU=88K,SO=89K -FLOW CHECK,MONITOR WELL 10 MIN, STATIC. 18.30 - 20:00 1.50 DRILL P SURF POOH ON ELEVATORS,F/1975'MD TO 870' MD.ENCOUNTER TIGHT HOLE(30K OVERPULL)@ 870' 20.00 - 23:00 3.00 DRILL P SURF MU TDS,ESTABLISH CIRC,ATTEMPT BACKREAM F/905'MD,HOLE PACKED OFF @ 870'MD -INITALLY UNABLE TO ROTATE/ RECIPROCATE PIPE -WORK PIPE,PUMP AND BLEED PRESSURE UNTIL ROTATION,CIRCULATION AND RECIPROCATION WAS RESTABLISHED. -CIRC,ROTATE AND RECIPROCATE PIPE 2X F/ 930'TO 840'W/450 GPM,880 PSI -14BBL MUD LOSS DURING WORKING PIPE 23:00 - 00:00 1.00 DRILL P SURF CONT POOH, PRECAUTIONARY BACKREAM F/840'MD-649'MD W/200 GPM,250 PSI -MUD LOSS FOR TOUR=67 BBLS -TOTAL MUD LOSS FOR 24HRS 109 BBLS Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 4 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C.DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time 3/28/2013 1:00:00AM Rig Release.4/22/2013 Rig Contractor.DOYON DRILLING INC. UW Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 3/30/2013 00:00 - 00:30 0.50 DRILL P SURF CONT POOH F/649'MD TO 281'MD 00:30 - 01:30 1.00 DRILL P SURF WORK BHA F/281', LD UBHO,MILK MOTOR, LD BIT#1 -BIT GRADE 6-8-BT-A-E-3-BT-BHA 01:30 - 02:30 1.00 DRILL P SURF PU/MU NEW 12-1/4"VM-3 BIT#2,ADJUST MOTOR F/1.83°TO 1.5° 02:30 - 04:00 1.50 DRILL P SURF I DOWNLOAD MWD INFORMATION. 04:00 - 05:30 1.50 DRILL P SURF RIH W/BHA#3 TO 483' 05:30 - 06:00 0.50 DRILL P SURF CIRC AND PULSE TEST MWD 06:00 - 06:30 0.50 DRILL P SURF RIG SERVICE, INSPECT AND SERVICE TDS 06:30 - 07:30 1.00 DRILL P SURF RIH W/BIT#2 TO 1220'MD 07:30 - 09:00 1.50 DRILL P SURF WORK TIGHT HOLE F/1220'MD TO 1400'MD -WASH/REAM F/1310'MD TO 1400'MD W/550 GPM,1490 PSI. 09:00 - 11:30 2.50 DRILL N RREP 1,400.00 SURF REPLACE ENCODER ON TDS,CIRC(1BPM, THROUGH HEADPIN 11:30 - 12.30 1.00 DRILL P SURF I RIH F/1400'MD TO 1800'MD 12:30 - 13:00 0.50 DRILL P SURF MU TDS,ESTABLISH CIRC -WASH F/1800'MD TO 1975'MD 550 GPM,1730 PSI -40 RPM,3 K TO 13:00 - 00:00 11.00 DRILL P SURF DRILL 12-1/4"SURFACE HOLE F/1975'MD TO 3112'MD(2943'TVD) -40 RPM,5 K TO ON/2 K TO OFF -25/30 K WOB -PUMP RATE 700 GPM,3121 PSI ON BTM, 2930 PSI OFF BTM MW 9.2IN/9.2OUT -P/U=110 K,S/0=102 K,ROT=102K -AST=1.14,ART=3.39,ADT=4.53,TOTAL BIT HRS=4.53 -JARS=18.29 3/31/2013 00:00 - 03:00 3.00 DRILL P SURF DRILL 12-1/4"SURFACE HOLE F/3,112'MD T/ 3,374'MD(3,179'TVD). -PUMP RATE 700 GPM,3330 PSI ON BTM, 3050 PSI OFF BTM. -60 RPM,6K TQ ON/4 K TO OFF. -25/30 K WOB. MW 9.4 IN/9.4 OUT. -P/U=114 K,S/0=101 K,ROT=103K. -AST=0.23 HRS,ART=1.65 HRS,ADT=1.88 HRS,TOTAL BITS HRS=6.21. -JAR HRS=20.2. 03:00 - 04:30 1.50 DRILL P SURF CBU 3X WHILE ROTATING AND RECIPROCATING F/3,374'T/3,300'MD. -790 GPM,3670 PSI -100 RPM,3K TQ _ 04:30 - 06:30 2.00 DRILL P SURF MONITOR WELL(STATIC) -WIPER TRIP TO BASE OF PERMAFROST ON ELEVATORS F/3,374'MD TO 1880'MD. 06:30 - 07:00 0.50 DRILL P SURF RIH ON ELEVATORS F/1880'MD TO 3374' 07:00 - 09:30 2.50 DRILL P SURF CIRC UNTIL SHAKERS CLEAN,ROTATE AND RECIPROCATE PIPE F/3374'MD TO 3300'MD -750 GPM -100 RPM,4TO 09:30 - 10:00 0.50 DRILL P SURF MONITOR WELL,STATIC. -PUMP 20 BBL DRY JOB Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 5 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) L Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To 1 Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 10:00 - 12:00 2.00 DRILL P SURF POOH ON ELEVATORS F/3374'MD-580'MD -TIGHT SPOTS ENCOUNTERED AT 2,200'MD, 1,800'MD,AND 1,200'MD. WIPED SAME. 12:00 - 15:30 3.50 DRILL P SURF LD 4"HWDP,BHA,AND BIT#2. -CLEAN AND CLEAR FLOOR -BIT#2GRADE 1-0-WT-M-E-I-RR-TD 15:30 - 16:30 1.00 CASING P SURF PU LANDING JT AND HANGER. -PERFORM DUMMY RUN W/FMC REP AND MARK. -LD SAME. 16:30 - 18:30 2.00 CASING P SURF RU TO RUN 9 5/8"40#L-80 BTC CSG. -CHANGE OUT BAILS AND ELEVATORS. CHANGE SLIP CARRIERS TO 9 5/8". -PU VOLANT TOOL,AND MAKE UP W/XO AND SAFETY VALVE. -PU CENTRALIZERS TO RIG FLOOR. 18:30 - 19:00 0.50 CASING P SURF PJSM, DISCUSS-CSG RUN,AAR ON RU,CSG RUN,AND STAYING FOCUSED 19:00 - 00:00 5.00 CASING P SURF PU SHOE TRACK AND CHECK FLOAT EQUIPT, OK. -RIH W/95/8"40#L-80 BTC CASING W/ .VOLANT TOOL F/0'-1,361'MD. -FILL ON EACH JT, BRK CIRC FOR 200 STKS EACH 10 JTS. 4/1/2013 00:00 - 04:00 4.00 CASING P SURF CONT RIH W/9-5/8",40#,L-80,SURFACE CASING F/1,631'MD T/3,364'MD. -FILL EACH JOINT. -BREAK CIRCULATION EVERY 10TH JOINT, CIRC 200 STKS. -OBSTRUCTION ENCOUNTERED AT 2,220' MD. -STAGE PUMPS UP TO 340 GPM,260 PSI -CIRCULATE AND WORK THROUGH TIGHT SPOT. -CONT RIH. 04:00 - 05:00 1.00 CASING P SURF CIRCULATE WHILE RECIPROCATING F/3,250' MD T/3,230'MD -170 GPM,230 PSI 05:00 - 05:30 0.50 CASING P SURF MU HANGER AND LANDING JOINT PER FMC REP 05:30 - 07:30 2.00 CASING P SURF CIRCULATE AND CONDITION MUD WHILE RECIPROCATING F/3,362'MD T/3,342'MD -STAGE PUMPS UP TO 320 GPM,300 PSI 07:30 - 09:30 2.00 CEMT N HMAN 3,364.00 SURF RIG UP SLB CEMENTING -BD TOP DRIVE -ESTABLISH CIRCULATION 09:30 - 19:00 9.50 CEMT N HMAN 3,364.00 SURF WAIT ON SLB CEMENTING FOR NEW LOADOUT OF CEMENT -CONT TO CIRCULATE WHILE RECIPROCATING F/3,362'MD T/3,342'MD -320 GPM,300 PSI P/U=164K,S/O=136K Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 6 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.6ousft(above Mean Sea Level) Date From-To Hrs Task ! Code NPT NPT Depth Phase Description of Operations r (usft)19:00 00:00 5.00 CEMT P SURF CEMENT 9 5/8"SURFACE CASING AS FOLLOWS: PJSM FOR 9-5/8"CEMENTING WITH SCHLUMBERGER AND CH2MHILL -LINE UP TO SCHLUMBERGER CEMENTERS. PUMP 10 BBLS OF 10 PPG MUDPUSH -TEST LINES TO 250/4500 PSI,5-MINUTES EACH,GOOD TEST. I-PUMP 90 BBLS OF 10-PPG MUDPUSH.TEST FIELD SAMPLE AS PER PROCEDURE. -DROP BOTTOM PLUG RECIPROCATE CASING IN 10'STROKES -PUMP 678-BBLS(2057 SX)11.0-PPG LEAD LITECRETE CEMENT.YIELD 1.85 CUFT/SK PUMP 76.9-BBLS(372 SX)15.8-PPG CLASS "G" TAIL CEMENT.YIELD 1.16 CUFT/SK -DROP TOP PLUG.KICK OUT PLUG WITH 10-BBLS H2O -MAX SURFACE PRESSURE=1150 PSI,MAX RATE=10 BPM DISPLACE WITH 9.4 PPG DRILPLEX 4/2/2013 00:00 - 01:00 1.00 CEMT P SURF CONT DISPLACEMENT W/RIG PUMPS SLOWED PUMP RATE TO 2 BPM PLUG BUMPED ON CALACULATED STROKES,HOLD 500 PSI OVER -CHECK FLOATS,FLOATS HELD 108-BBLS CONTAMINATED MUD PUSH TO SURFACE. . "CEMENT IN PLACE AT 00:30" 01 00 - 03:00 2.00 CEMT P SURF RD SLB CEMENTING EQUIPMENT FLUSH CEMENTING EQUIPMENT -DISCUSSED PLAN FOWARD WITH SUPERINTENDENT AND ODE 03:00 - 04:00 1.00 CEMT P SURF RD VOLANT CRT - SIMOPS CLEAN RIG 04:00 - 07:00 3.00 DIVRTR P SURF ND DIVERTER EQUIPMENT 07:00 - 09:00 2.00 DIVRTR P SURF UD DIVERTER&CASING EQUIPMENT - WAITING ON ORDERS TO PROCEED 09:00 - 12:00 3.00 WHSUR P SURF N/U 11"TUBING SPOOL TO CASING HEAD AS PER FMC REP. N/U DSA,SPACER SPOOL& RISER. FMC PRESSURE TEST METAL TO METAL SEAL ON CASING HEAD TO 1000-PSI FOR 5 MINUTES PER FMC PROCEDURE. PRESSURE TEST CHART ATTACHED. 12:00 - 16:00 4.00 BOPSUR P SURF N/U BOPE -INSTALL STACK,JOES BOX,RISER,CHOKE &KILL LINES '•AOGCC ENGINEER VICTORIA FERGUSON GRANTED APPROVAL TO PROCEED WITH TOP JOB AT 14:45 16:00 - 18:30 2.50 CEMT N CEMT SURF P/U 1-1/4"HYDRIL TOP JOB PIPE -M/U MULE SHOE,PUMP 4 JTS IN HOLE WITH TEST PUMP TO 132'MD,PU TO 122' -R/U CEMENTERS FOR 1-1/4"CS HYDRIL FOR SURFACE HOLE TOP JOB 18:30 - 20:00 1.50 CEMT N CEMT SURF WAIT ON SLB CEMENTING LAB TEST I- RIG HOUSEKEEPING Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 7 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project Prudhoe Bay Site:PB Z Pad Rig Name/No..DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 20:00 - 20:30 0.50 CEMT N CEMT SURF -PJSM FOR TOP OUT CEMENT JOB OPERATIONS -SLB CREWS,RIG CREWS AND CH2MHILL LEAD. 20:30 22:30 2.00 CEMT N CEMT SURF PUMP SURFACE CEMENT TOP JOB AS FOLLOWS: -PUMP 92.5 BBLS,188 SKS OF 10.7 PPG ARCTIC-SET LITE,YIELD-2.78 FT3/SK 1.3 BPM,75 PSI CEMENT TO SURFACE "CIP AT 22:30** AOGCC REP.JOHN CRISP WITNESSED TOP OUT AND CEMENT TO SURFACE 22:30 - 23:30 1.00 CEMT N CEMT SURF PULL 1-1/4"CS HYDRIL T/SURFACE -FLUSH PIPE TO CELLAR WHILE POOH 23:30 - 00:00 0.50 CEMT N CEMT SURF LD 1-1/4"CS HYDRIL PIPE -BD TEST PUMP -CLEAN AND CLEAR RIG FLOOR Printed 5/6/2013 10:26.46AM • North America-ALASKA-BP Page 8 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 }Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 4/3/2013 00:00 - 05:30 5.50 BOPSUR P SURF TEST BOPE PER BP/AOGCC/DDI REQUIREMENTS TO 250-PSI LOW/3500-PSI HI. TESTED 2-7/8"X 5-1/2"UPPER VBR'S.2-7/8"X 5-1/2"LOWER VBR'S WITH 4" TEST JT. 'TESTED BLIND SHEAR RAMS 250-PSI LOW/ 3500-PSI HI.2 EA.OF 4-1/2"IF FOSV'S.2 EA. OF 4"FOSV.4"DART VALVE.2 EA OF 5"FOSV. 5"DART VALVE.TESTED CHOKE MANIFOLD VALVES 1-15.CHOKE AND KILL MANUAL& HCR VALVES.4"KILL LINE VALVE&UPPER AND LOWER TOP DRIVE IBOP'S.TESTED !MANUAL AND SUPER CHOKES TO 250-PSI LOW/2000-PSI FOR 5 CHARTED MINUTES EACH TEST.TESTED ANNULAR PREVENTER WITH 4"TEST JT.250-PSI LOW/3500-PSI HI. CHARTED ALL HI AND LO TESTS FOR 5-MINUTES EACH. •CLOSING TIMES: BLIND/SHEARS=22 SEC. UPPER VBR'S= 18 SEC. •LOWER VBR'S=19 SEC. ANNULAR= 23 SEC. HCR KILL= 2 SEC. HCR CHOKE= 2 SEC. •PERFORMED ACCUMULATOR DRAWDOWN TEST: -ACCUMULATOR PSI=3050,MANIFOLD PSI= 1500. -ACCUMULATOR PSI AFTER FUNCTIONING BOPE=1600-PSI. -RECOVERY TO FULL SYSTEM PRESSURE= 2-MINUTES 34-SECONDS. -6 NITROGEN BOTTLES AVERAGE PRESSURE=1950-PSI. I REFERENCED DDI BOP TESTING SOP FOR ALL TESTING. BOPE TEST WAIVED I I WITNESSED BY AOGCC REP-JOHN CRISP. WITNESSED BY DOYON TOURPUSHER- JUSTIN HAYS,AND BP WSL-ANTHONY KNOWLES. 05:30 - 07:00 1.50 BOPSUR P SURF RD BOPE TEST EQUIPMENT. -REMOVE TEST PLUG. -INSTALL 9"WEAR BUSHING. -BD CHOKE AND KILL LINES,CHOKE MANIFOLD. 07:00 - 15:30 8.50 DRILL P I SURF MAKE ENOUGH 4"DP IN STANDS TO REACH PLANNED INTERMEDIATE TD. -44,SINGLES,65 DOUBLES -BREAKOUT,REDOPE,AND REMAKE ALL MIDDLE CONNECTIONS -MU ALL DP CONNECTIONS TO 24K TQ. 15:30 - 16:00 ' 0.50 DRILL P SURF TEST 9-5/8",L-80 SURFACE CASING TO 250 LO/3,500 PSI HI FOR 5/30 CHARTED MIN. -SENT PT CRITERIA TO TO WTL -RECEIVED AUTHORIZATION TO PROCEED -UPLOADED TO OPENWELLS Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 9 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOVON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UVN: Active datum:2-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 16:00 - 19:30 3.50 DRILL P SURF MU BHA#4 PER SLB DD REP. -PJSM -8-3/4"PDC BIT -6-3/4",1.5 DEG MOTOR -ARC-GR/RES -ILS 6-3/4" -MWD-D/I ADN6-NEU/DEN -WELL COMMANDER . -GHOST REAMER 19:30 - 20:30 1.00 DRILL P SURF PJSM FOR HANDLING RADIOACTIVE SOURCE. -LOAD SOURCE PER SLB MWD 20:30 - 22:30 2.00 DRILL P SURF CONT RIH W/BHA#4 F/101'MDT/772'MD. -PU 5"HWDP 22:30 - 23:00 0.50 DRILL P SURF SHALLOW MWD PULSE TEST(GOOD). - 450 GPM,865 PSI 23:00 00:00 1.00 DRILL P SURF CONT RIH W/BHA#4 F/772'MDT/1,695'MD PICKING UP 78 SINGLES. 4/4/2013 00:00 - 02:00 2.00 DRILL P SURF RIH ON 4"DP WITH INTERMEDIATE BHA#4 -TAG UP AT 3,233' -PU AND LAY DOWN A SINGLE 02:00 - 04:30 2.50 DRILL P SURF PJSM FOR SLIP&CUT OPERATIONS -SLIP AND CUT 47'OF DRILLING LINE 04:30 - 05:00 0.50 DRILL P SURF SLB AND TOTCO [CALIBRATE HOOK LOAD AND DEPTH CONTROL 05:00 - 05:30 0.50 DRILL P SURF CLEAN OUT CEMENT TO WITHIN 10'ABOVE SHOE TRACK F/3,233'MD T/3,342'MD -460 GPM,1760 PSI -40 RPM,5-7K TQ -15K WOB 05:30 - 07:00 1.50 DRILL P_ SURF DISPLACE WELL OVER TO 9.0 PPG LSND MUD -450 GPM -ICP=1680 PSI,FCP=1050 PSI 07:00 - 07:30 0.50 DRILL P SURF SERVICE INSPECT CROWN SHEAVES 07:30 - 08:00 0.50 DRILL P SURF CONT TO CLEAN OUT SHOE TRACK AND DRILL 20'OF NEW HOLE F/ 3,342'MD T/3,394' MD -465 GPM,1150 PSI -40 RPM,3-5K TO -3K WOB 08:00 - 09:00 1.00 DRILL P SURF PERFORM LOT AT 3,394'MD,3,170'TVD -MW 9.0 PPG -SUCCESSFUL LOT TO 13.9 PPG EMW(805 PSI), (>50 BBL KICK TOLERANCE) • -ODE APPROVAL TO PROCEED Printed 5/6/2013 10:26 46AM • North America-ALASKA-BP Page 10 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 09:00 - 12:00 3.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE FROM 3394' MD TO 3,722'MD(3,780'TVD) -555 GPM,1680 PSI ON/1510 PSI OFF -40 RPM,TQ=5-6K ON/4K OFF -WOB=3-5K -MW=9.1 PPG IN/9.1 PPG OUT -ECD=10.05 PPG(CALC ECD=9.91 PPG) -P/U=125K,S/O=113K,ROT=103K AST=1.04 HRS,ART=.74,ADT=1.78 HRS TOTAL BIT HRS=1.78,TOTAL JAR HRS=22 SPR'S: 3,341'MD(3,149'TVD)-TIME=07:00, MW=9.1 PPG #1 MP-20/30 SPM=160/200 PSI #2 MP-20/30 SPM=150/200 PSI 12:00 - 00:00 12.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE FROM 3,722' MD(3,780'TVD)TO 4,955'MD,4,279'TVD -555 GPM,2265 PSI ON/2029 PSI OFF -40-80 RPM,TQ=7K ON/6K OFF WOB=7K -MW=9.1 PPG IN/9.1 PPG OUT -ECD=9.87 PPG(CALC ECD=9.74 PPG) P/U=132K,S/O=112K,ROT=118K AST=2.42 HRS,ART=3.62,ADT=6.04 HRS TOTAL BIT HRS=7.82,TOTAL JAR HRS=28.7 SPR'S: 4,384'MD(3,960'TVD)-TIME=19:07, MW=9.1 PPG I#1 MP-20/30 SPM=220/260 PSI #2 MP-20/30 SPM=220/260 PSI SPR'S: 4,859'MD(4,241'TVD)-TIME=23:11, MW=9.1 PPG #1 MP-20/30 SPM=260/320 PSI #2 MP-20/30 SPM=260/320 PSI 4/5/2013 00:00 - 12:00 12.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE FROM 4,955' MD T/6,367'MD(5,133'TVD) 580 GPM,2910 PSI ON/2640 PSI OFF 80 RPM,TQ=8-9K ON/6K OFF WOB=13K -MW=9.3 PPG IN/9.3+PPG OUT -ECD=10.31 PPG(CALC ECD=9.85 PPG) -P/U=146K,S/O=125K,ROT=134K AST=1.97 HRS,ART=5.15,ADT=7.12 HRS SPR'S: 5,999'MD(4,910'TVD)-TIME=09:15, MW=9.4 PPG #1 MP-20/30 SPM=260/340 PSI #2 MP-20/30 SPM=260/340 PSI Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 11 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT ! NPT Depth ' Phase Description of Operations (hr) (usft) 12:00 - 00:00 12.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE FROM 6,367' MD T/7,425'MD(5,749'TVD) -580 GPM,3500 PSI ON/3470 PSI OFF -80 RPM,TQ=8-9K ON/6K OFF WOB=13K -MW=9.6 PPG IN/9.7 PPG OUT ECD=10.52 PPG(CALC ECD=10.21 PPG) P/U=161K,5/0=132K,ROT=138K AST=1.98 HRS,ART=10.34,ADT=13.32 HRS TOTAL BIT HRS=21.14,TOTAL JAR HRS= 21.5 SPR'S: 7,137'MD(5,576'TVD)-TIME=20:00, MW=9.5 PPG #1 MP-20/30 SPM=300/380 PSI #2 MP-20/30 SPM=300/380 PSI 4/6/2013 00:00 - 12:00 12.00 j DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE F/7,425'MD T/8,185'MD(6,337'TVD) -535 GPM,3740 PSI -40 RPM,TQ=9K -WOB=12K -MW=10.3+PPG IN/10.3+PPG OUT -ECD=11.23 PPG(CALC ECD=10.91 PPG) -P/U=175K,S/O=128K,ROT=138K AST=3.91 HRS,ART=2.59,ADT=6.5 HRS SPR'S: 7,710'MD(5,938'TVD)-TIME=04:45, MW=10.3 PPG #1 MP-20/30 SPM=340/440 PSI #2 MP-20/30 SPM=340/460 PSI 12:00 - 00:00 12.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE FROM 8,185' MD T/9,000'MD(7,063'TVD) -525 GPM,3950 PSI ON/3835 PSI OFF -100 RPM,TQ=12K ON/9K OFF -WOB=12K -MW=10.4 PPG IN/10.4 PPG OUT -ECD=11.57 PPG(CALC ECD=10.94 PPG) -P/U=207K,S/O=146K,ROT=169K AST=1.94 HRS,ART=4.73,ADT=6.67 HRS TOTAL BIT HRS=34.31,TOTAL JAR HRS= ;55.2 SPR'S:8,565'MD(6,665'TVD)-TIME=17:30, MW=10.4 PPG #1 MP-20/30 SPM=300/420 PSI #2 MP-20/30 SPM=280/420 PSI 4/7/2013 00:00 - 12:00 12.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE F/9,000'MD T/10,085'MD(8,050'TVD) -502 GPM,3980 PSI -100 RPM,TQ=12-13K 1-WOB=8K -MW=10.4+PPG IN/10.4+PPG OUT -ECD=11.30 PPG(CALC ECD=10.93 PPG) -P/U=226K,S/0=160K,ROT=185K SPR'S:10,084'MD(8,050'TVD)-TIME=11:50, MW=10.4+PPG #1 MP-20/30 SPM=340/470 PSI #2 MP-20/30 SPM=360/470 PSI Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 12 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 12:00 - 00:00 12.00 DRILL P INT1 DRILL 8-3/4"PRODUCTION HOLE F/10,085'MD T/10,845'MD(8,729'TVD) -500 GPM,3950 PSI ON/3780 PSI OFF -100 RPM,TQ=13K ON/10K OFF -WOB=10-12K -MW=10.4 PPG IN/10.4 PPG OUT -ECD=11.08 PPG(CALC ECD=10.93 PPG) -P/U=245K,S/O=165K,ROT=190K 1 AST=1.94 HRS,ART=13.13 HRS,ADT=15.07 , HRS TOTAL BIT HRS=49.38,TOTAL JAR HRS=70.3 SPR'S:10,548'MD(8,729'TVD)-TIME=19:20, MW=10.3+PPG #1 MP-20/30 SPM=390/500 PSI #2 MP-20/30 SPM=360/500 PSI 4/8/2013 L 00:00 - 02:00 2.00 DRILL P 1 INT1 CONT DRILLING FROM 10,896'MD TO 10,906' MD,(8,792'TVD). -CBU TO CONFIRM TSGR PICK 1 -GEO DISCUSSED SAG RIVER PICK WITH TOWN. DECISION WAS MADE TO DRILL ANOTHER 5' ' ' AND CBU. ' -DRILL FROM 10,906'MD TO 10,911'MD(TD). (8,795'TVD). ' -500 GPM,3612 PSI. -120 RPM,11K TQ. -10.4 PPG IN/10.4 PPG OUT. -PUMP 40 BBLS HI-VIS SWEEP. -P/U=226K,S/O=160K,ROT=185K. AST=0 HRS,ART=.76 HRS,ADT=.76 HRS , � TOTAL BIT HRS=50.14,TOTAL JAR HRS=71 02:00 - 03:00 1.00 DRILL I P 1 INT1 DRILL 8-3/4"PRODUCTION HOLE F/10,845'MD T/10,896'MD(8,781'TVD). -TOP OF SAG CALLED BY GEO AT 10,896'. -500 GPM,3950 PSI ON/3800 PSI OFF. -100 RPM,TQ=13K ON/10K OFF. -WOB=10-12K. -MW=10.4 PPG IN/10.4 PPG OUT. 03:00 - 06:00 3.00 DRILL P INT1 CIRCULATE WHILE ROTATING AND RECIPROCATING. -500 GPM,3612 PSI -120 RPM,11K TQ -10.4 PPG IN/10.4 PPG OUT ,-OBSERVED A PRESSURE LOSS DURING THE , CIRCULATION. -PRESSURE DROPPED F/3760 PSI TO 3060 I PSI IN 35 MIN. 1 I-TROUBLESHOOT POSSIBLE RIG PUMP WASH OUT. 06:00 - 06:30 0.50 DRILL P INT1 SHUT DOWN PUMPS. -OBTAIN SLOW PUMP RATES SPR'S:10,911'MD(8,795'TVD)-TIME=05:45, MW=10.4+PPG #1 MP-20/30 SPM=260/360 PSI #2 MP-20/30 SPM=260/360 PSI -MONITOR WELL FOR WELL FOR 10 MIN- WELL STATIC. Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 13 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 06:30 - 07:30 1.00 DRILL P INT1 PUMP OUT OF HOLE F/10,911'MD TO 10,277' MD. 2 BPM,400 PSI. PUW-253K,SOW-165K. DISCUSSED PLAN FORWARD WITH TOWN FOR WASHOUT TROUBLESHOOTING. SHUT DOWN PUMPS. 07:30 - 10:30 3.00 DRILL P INT1 POOH ON ELEVATORS LOOKING FOR WASHOUT. F/10,277'MD TO 7,075'MD. MONITORING TRIP VIA THE TRIP TANK. -WORKING THROUGH OBSTUCTIONS WITH PUMPS OFF AT 8,580'&8,027' WASHOUT FOUND©7,075'BIT DEPTH. THREE FEET BELOW THE TOOL JOINT. LD BAD JOINT. CONTINUE POOH ON ELEVATORS F/7,075' MD TO 6,285'MD -MONITORING TRIP VIA THE TRIP TANK 10:30 - 11:30 1.00 DRILL P INT1 CIRCULATE BOTTOMS UP WHILE RECIPROCATING F/6,285'MD TO 6,190'. 580 GPM,3510 PSI. 11:30 14:00 2.50 DRILL P INT1 TIH ON ELEVATORS F/6,285'MD TO 10,911' MD. -MONITORING TRIP VIA THE TRIP TANK, FILLING EVERY 20 STANDS. -PUW-260K,SOW-162K. -OBSTRUCTION AT 9,470'MD TOOK 20 K, WORKED THROUGH OBSTRUCTION DRY-NO PUMPS 14:00 - 16:30 2.50 DRILL P INT1 CIRCULATE BOTTOMS UP X 2. -ROTATE AND RECIPROCATE F/10,911'MD TO 10,845'MD. -468 GPM,3902 PSI,100 RPM,TQ-12K. -PUW-260K,SOW-162K,ROT-188K. -MONITOR WELL 10 MIN-WELL STATIC. -SPOT 300 BBLS OF NEW MUD ON BOTTOM 16:30 - 23:00 6.50 DRILL P INT1 PUMP OUT OF THE HOLE TO ABOVE THE KINGAK F/10,911'MD TO 9,517'MD. -85 GPM,400 PSI. POOH ON ELEVATORS F/9,517'MD TO 3,342' MD-20'UP IN THE 9-5/8"CASING. -MONITOR TRIP VIA THE TRIP TANK • 23:00 - 00:00 1.00 DRILL P INT1 CIRCULATE 9-5/8"CASING CLEAN. -CIRCULATE 3X BU. -605 GPM,120 RPM,3000 PSI. -LARGE VOLUME OF CLAY BALLS RETURNED DURING CBU -PUW-116K,SOW-107K. -MONITOR WELL FOR 10 MIN-WELL STATIC. 24 HR LOSSES-0 BBLS • 4/9/2013 00:00 - 00:30 0.50 DRILL P INT1 POOH ON ELEVATORS F/3,343'MD TO 2,965' MD. -MONITORING TRIP VIA THE TRIP TANK 00:30 - 01:00 0.50 DRILL P INT1 RIG SERVICE. SERVICE PS-21 SLIPS. 01:00 - 02:00 1.00 DRILL N RREP 2,965.00 INT1 REPAIR PS-21 ROTARY SLIPS. BROKEN HYDRAULIC FITTINGS. Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 14 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 02:00 - 05:00 3.00 DRILL P INT1 POOH ON ELEVATORS F/2,965'MD T/755'MD -MONITOR TRIP VIA TRIP TANK -MONITOR WELL PRIOR TO PULLING BHA INTO STACK-WELL STATIC 05:00 - 07:30 2.50 DRILL P INT1 LD BHA#4 PER SLB DD F/755'TO 101' -PJSM FOR SOURCE REMOVAL PER SLB PROCEDURE -PULL SOURCE -LD REST OF BHA F/101'TO SURFACE -PDC BIT GRADE-1-3-CT-G-X-2-PN-TD -ALL STRING STABILIZERS AND GHOST REAMER-1/Fr UNDER GUAGED 07:30 - 08:00 0.50 DRILL P INT1 CLEAN&CLEAR RIG FLOOR. -PULL WEAR BUSHING 08:00 - 09:00 1.00 BOPSUR P INT1 PJSM AND C/O UPPER PIPE RAMS TO 7" CASING RAMS -PULL STRIP-O-MATIC -RD 4"HANDLING EQUIPMENT 09:00 - 10:00 1.00 BOPSUR P INT1 PJSM AND TEST BOP RAMS -P/U 7"TEST JOINT,M/U TEST PLUG,FILL STACK WITH WATER PRESSURE TEST UPPER 7"RAMS -250 PSI/4500 PSI FOR 5 MIN/5 MIN CHARTED TEST -GOOD TEST 10:00 - 10:30 0.50 CASING P INT1 INSTALL 7"ELEVATORS P/U HANGER AND LANDING JOINT PERFORM DUMMY RUN WITH 7"HANGER AND LANDING JOINT -MARK LANDING JOINT AT ROTARY TABLE 10:30 - 13:00 2.50 CASING P INT1 DRAIN STACK,PULLAND L/D 7"TEST JOINT -B/D LINES AND R/D TESTING EQUIPMENT - RIG UP CASING RUNNING EQUIPMENT, VOLANT,BAIL EXTENSIONS,250 TON ELEVATORS,POWER TONGS&TORQUE TURN EQUIPMENT -PU CENTRALIZER'S TO RIG FLOOR. 13:00 - 14:00 1.00 CASING P INT1 PJSM WITH RIG CREW,DDI CASING,&BP -REVIEW DDI PROCEDURE FOR RUNNING 7" CASING -ALL HAZARDS IDENTIFIED AND DISCUSSED INCLUDING WELL CONTROL SCENARIOS -PU/MU SHOE TRACK TO 126'MD,CHECK FLOATS-FLOATS GOOD 14:00 - 21:00 7.00 CASING P INT1 RUN 7"26#L-80 VAMTOP HC CASING F/126' MD TO 3,360"MD -MONITOR WELL ON PIT 2&3 -FILL EVERY 10 JTS -TORQUE TURN ALL CONNECTIONS TO 11,950 FT-LB 21:00 - 21:30 0.50 CASING P INT1 CIRCULATE BOTTOMS UP AT 3,360'MD,4' ABOVE THE 9-5/8"SHOE -STAGE PUMPS UP TO 7 BPM -ICP AT 2 BPM-300 PSI,FCP AT 7 BPM-660 PSI -PUW-115K,SOW-111K Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 15 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) i Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:OOAM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) • 21:30 - 00:00 2.50 CASING P INT1 RUN 7"26#VAMTOP HC L-80 CSG F/3,360'MD TO 4,552'MD - MONITOR WELL ON PITS 2&3 -BREAK CIRCULATION AND WASH DOWN AT 5 BPM EVERY 10 JOINTS -TORQUE TURN ALL CONNECTIONS TO 11,950 FT-LB -ZERO LOSSES 4/10/2013 00:00 - 06:00 6.00 CASING P INT1 RUN 7"26#VAMTOP HC L-80 CSG F/4,552'MD - MONITOR WELL ON PIT 2&3 -BREAK CIRCULATION AND WASH DOWN AT '5 BPM EVERY 10 JOINTS -TORQUE TURN ALL CONNECTIONS TO 11,950 FT-LB 06:00 - 11:00 5.00 CASING P INT1 RUN 7"26#L-80 VAMTOP HC CASING F/4,552' MD TO 10,902'MD MONITOR DISPLACEMENT VIA PIT#2-3 ' -FILL EVERY JT AND BREAK CIRCULATION EVERY 10 JTS -3 BPM,ICP-760 PSI,STAGE PUMPS UP TO 7 i BPM WITH 1130 PSI PUW-334 K,SOW-154K WITH PUMPS ;11:00 - 14:00 3.00 CASING P INT1 CIRCULATE AND CONDITION MUD WHILE RECIPROCATING FROM 10,901'-10,894' -5 BPM©725 PSI -UP WT W/PUMPS=345K, DN WT W/PUMPS • =160K -TOTAL CIRCULATING ON BOTTOM 3-1/2 BOTTOMS UP 14:00 - 15:00 1.00 CEMT P INT1 RU CEMENTERS -PJSM FOR CEMENTING OPERATIONS, REVIEW CADE WITH SLB CEMENTERS -PRESSURE TEST SURFACE CEMENT LINES TEST CEMENT LINES TO 250 PSI LOW/4500 L, I � PSI HIGH FOR 5 CHARTED MINUTES-GOOD Printed 5/6/2013 10:26:46AM • North America-ALASKA-BP Page 16 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) II, Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code I NPT NPT Depth Phase Description of Operations (hr) (usft) 15:00 - 18:30 3.50 CEMT P INT1 INTERMEDIATE CEMENT JOB AS FOLLOWS. -PUMP 50 BBLS OF 11.0 PPG MUD PUSH II @ j 5 BPM,650 PSI„20%F/O LAUNCH BOTTOM PLUG -CHASE W/220 BBLS (703 SXS)OF LEAD, 11.5 PPG LITECRETE+GASBLOK,1.76 FT3/SK @ 5 BPM,700 PSI, -PUMP 21 BBLS(102 SXS)OF TAIL,15.8 PPG CLASS G,1.17 FT3/SK @ 5.0 BPM,460 PSI, '-LAUNCH TOP PLUG AND CHASE W/10 BBL FRESH H2O • -DISPLACE CEMENT WITH 404 BBLS OF 10.4 PPG LSND MUD @ 7 BPM,1356 PSI, 5 BPM,1135 PSI 4 BPM,1357 PSI 3 BPM,1293 PSI 2 BPM,1150 PSI, PRIOR TO BUMPING i ,-BUMPED PLUG @ 4037 STKS,1150 PSI( I 1 95.5%PUMP EFFICIENCY)-PRESSURE UP TO 1700 PSI FOR 5 MIN -CHECK FLOATS-HOLDING -ZERO LOSSES DURING CMT CIRCULATION , AND DISPLACEMENT CEMENT IN PLACE AT 18:10-HRS: -TAIL CMT WILL ACHIEVE 500 PSI COMPRESSIVE STRENGTH @ 07:00 HRS 4/11 -FULL RETURNS DURING ENTIRE CEMENT JOB -241-BBLS OF CEMENT IN PLACE -GOOD LIFT PRESSURE THROUGHOUT JOB, FINAL CEMENT LIFT PRESSURE 1150-PSI ' _ -ESTIMATED TOP OF CEMENT:—4,100' 18:30 - 19:30 1.00 CEMT P INT1 PRESSURE TEST 7"CASING PER DWOP , AK-10-45 CASING TESTING REQUIREMENTS -250 PSI LOW FOR 5 MIN AND 3500 PSI HIGH FOR 30 MIN ' -PRESSURE ROSE 27 PSI IN THE FIRST 15 MIN&25 PSI IN THE SECOND 15 MIN. ***CASING TEST DATA REVIEWED BY ROTARY TEAM LEAD:CASING TEST RESULTS ACCEPTED*** 19:30 - 20:00 0.50 CEMT P ! -_- 0 INT1 CLEAR THE ANNULUS SHUT IN THE ANNULAR PREVENTER,PUMP DOWN THE OA WITH 10.5 PPG LSND MUD , •1 BPM,WITH PRESSURE BREAKING OVER AT 1169 PSI,PUMP ADDITIONAL TWO BBLS AT 1 BPM, 1230 PSI 20:00 - 22:00 2.00 CEMT P INT1 L/D LANDING JOINT AND R/D VOLANT CASING RUNNING TOOL ' -CLEAR AND CLEAN RIG FLOOR -FLUSH BOP STACK , i -BLOW DOWN TOP DRIVE Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 17 of 24 Operation Summary Report Common Well Name:Z-71 AFE No I Event Type:DRL-ONSHORE(DON) I Start Date:3/25/2013 End Date:4/18/2013 ,X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task l Code NPT NPT Depth Phase Description of Operations , (hr) (usft) 22:00 - 00:00 2.00 WHSUR P INT1 INSTALL 9 5/8"X 7"PACK-OFF&TEST TO 250 PSI LOW FOR 15 MIN,5000 PSI HIGH FOR 30 RECORDED MIN. -TESTING CRITERIA FOR PACK OFF PER PE MANUAL(SOP)FOR(PPPOT) -REMOVE 7"UPPER RAMS AND REPLACE W/ ,2 7/8"X 5 1/2"VBR'S ' -BRING BHA EQUIPMENT TO RIG FLOOR -CLEAN OUT CEMENT MANIFOLD -PREP RIG FLOOR FOR FULL BOP TEST. 4/11/2013 00:00 - 06:00 6.00 BOPSUR P INT1 TEST BOPE PER BP/AOGCC/DDI 'REQUIREMENTS TO 250-PSI LOW/3500-PSI I I HI. TEST BOPE WITH 4"&4.5"TEST JOINTS TESTED ANNULAR AND ALL RAMS TO 250 PSI LOW/3500 PSI HIGH FOR 5 MIN EACH. ALL TESTS CHARTED. I SEE TEST CHART AND KOOMY DRAW DOWN SHEET FOR DETAILS ' BOP CLOSING TIMES: -ANNULAR PREVENTER=22-SECONDS -UPPER PIPE RAMS=18-SECONDS '-LOWER PIPE RAMS=17-SECONDS ' -BLIND/SHEAR RAMS=22-SECONDS i j , -HCR KILL VALVE=2-SECONDS -HCR CHOKE=2-SECONDS. REFERENCED DDI BOP TESTING SOP FOR ALL TESTING. BOPE TEST WAIVED IWITNESSED BY AOGCC REP-JEFF TURKINGTON.WITNESSED BY DOYON TOUR PUSHER-JUSTIN HAYS,AND BP WSL- ANTHONY KNOWLES. 06:00 - 07:00 1.00 BOPSUR P INT1 RIG DOWN BOP TEST EQUIPMENT -INSTALL WEAR BUSHING,BLOW DOWN SURFACE EQUIPMENT -MU SHEAR JOINT -DERRICK INSPECTION 07:00 - 10:00 3.00 DRILL P INT1 MU&RIH W/BHA#5 PER SLB DD TO 97'MD -6-1/8"INSERT BIT. -1.5°-BEND MOTOR. D&I/GR/ADN/RES/NEU/DEN. WELL COMMANDER CIRC SUB ,-HYD JARS ' -4"HWDP AS NECESSARY. PJSM FOR LOADING THE RADIOACTIVE SOURCE PER SLB PROCEDURE -LOAD SOURCE CONTINUE RIH WITH BHA#5 F/97'TO 421' MD 10:00 - 13:00 3.00 DRILL P INT1 ,PJSM FOR SLIP AND CUT DRILL LINE ' '-SLIP AND CUT 102'OF DRILL LINE SERVICE TOP DRIVE&BLOCKS,PERFORM WORK ORDER ON TOP DRIVE -CALIBRATE BLOCK HEIGHT 13:00 - 16:00 3.00 DRILL P INT1 RIH WITH BHA#5 ON 4"DP DOUBLES FROM THE PIPE SHED F/421'MD TO 2,891'MD -MONITOR DISPLACEMENT FROM TRIP TANK PERFORM MWD SHALLOW HOLE TEST© 1371'MD(GOOD) -200 GPM,989 PSI Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 18 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 1X3-01348-C:DRILL(8,270,952.00) I - i Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM !Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. 1 UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 16:00 - 23:00 7.00 DRILL P INT1 TIH WITH BHA ON 4"DP STANDS FROM THE DERRICK I -TIH F/2,891'MD TO 10,776'MD,FILLING II, PIPE I-MONITOR DISPLACEMENT FROM TRIP TANK 1 I FILLING PIPE EVERY 20 STANDS -TAG CEMENT STRINGER© 10,776'MD '-DRILL CEMENT AT 200 GPM,2190 PSI,40 RPM,15KTQ, TAGGED UP ON FLOAT COLLAR AT 10,815'MD DRILL SHOE TRACK F/10,815'MD TO 10,890' -DRILL CEMENT AT 200 GPM,2190 PSI,40 ' RPM,15K TQ,4K WOB 23:00 - 00:00 1.00 DRILL P INT1 DISPLACE WELL TO 8.6 PPG POWERPRO -200 GPM,2,074 PSI,20 RPM,16K TQ 'PUMP 30 BBLS OF HIGH VIS SWEEP,25 BBLS OF WATER AHEAD OF THE 8.6 PPG ! POWERPRO 4/12/2013 00:00 - 01:30 1.50 DRILL P INT1 DISPLACE WELL TO 8.6 PPG POWERPRO -200 GPM,2,014 PSI .SPR'S:10,890'MD(8,784'TVD)-TIME=01:00, MW=8.5 PPG #1 MP-20/30 SPM=525/660 PSI 01:30 - 03:00 1.50 DRILL N RREP INT1 MOTOR MAN INFORMED THE DRILLER THAT THEY WERE LOSING FLUID IN THE KOOMY RESERVOIR. -PRESSURES WERE ALL STILL NORMAL. DRILLER SHUT DOWN PUMPING TO TROUBLE SHOOT.WAS DISCOVERED THAT HYDRAULIC FLUID WAS COMING INTO THE BOP STACK.DRILLER STOOD A STAND BACK, DRAINED AND CLEANED THE STACK TO INVESTIGATE FURTHER. -LEAK APPEARS TO BE COMING IN AT THE UPPER RAMS. NOTIFIED THE DAY WSLAND THE ROTARY SUPT OF THE SITUATION. -PLAN IS TO GET A 7"STORM PACKER OUT TO ISOLATE THE WELL SO WE CAN BREAK CONTAINMENT ON THE BOP. ,-DDI IS GOING TO REPLACE BOTH DOORS ON THE UPPER RAM BODY. 03:00 - 04:30 1.50 DRILL N 1 RREP INT1 POOH FROM 10,890'MD TO 8,017'MD -MONITORING TRIP VIA THE TRIP TANK 04:30 - 07:00 2.50 DRILL N RREP INT1 PU/MU HALLIBURTON STORM PACKER -RIH AND SET ONE STAND BELOW THE ROTARY -TEST TO 500 PSI-GOOD TEST • -PUW-146K,SOW-130K 107:00 - 07:30 0.50 DRILL N RREP INT1 INJECT 6 BBLS OF 10.5 PPG LSND INTO OA 1 FCP-1410 Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 19 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Activ e dat um:Z-71 actual 96.60usft(above Mean Sea Level) _ Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 07:30 - 18:00 10.50 DRILL N RREP INT1 OPEN UP BOP RAM DOORS TO TROUBLE SHOOT HYDRAULIC LEAK. -PRESSURE TEST THE OPERATORS TO 1500 PSI,FOR 5 MN-GOOD -DISCOVERED THE LEAK COMING FROM THE ANNULAR. PJSM FOR ANNULAR REMOVAL -REMOVE PREVENTER INTERNALS LOOKING FOR SOURCE OF HYDRAULIC LEAK HAD TO BUFF OUT MINOR SCARRING ON PISTON. 18:00 - 19:00 1.00 DRILL P INT1 FREEZE PROTECT THE 9-5/8"X 7"OA -PUMP 67 BBLS OF 70 DEG DIESELAT 1 BPM ,1940 PSI 19:00 - 20:00 1.00 DRILL N RREP INT1 DDI TROUBLE SHOOTING THE ANNULAR LEAK -FOUND TWO BAD SEALS IN THE ADAPTER 'RING. -SEAL KITS ON LOCATION DID NOT HAVE CORRECT SEALS. 20:00 - 00:00 4.00 DRILL N RREP INT1 WAIT ON PARTS FOR THE ANNULAR PREVENTER RIG CREWS WORKING ON MP2 MP'S -WORKING ON COMPLETION TUBING 4/13/2013 00:00 - 08:00 8.00 DRILL N RREP INT1 WAIT ON PARTS FOR THE ANNULAR PREVENTER RIG CREWS WORKING ON MP2 MP'S -LOADING&STRAPPING 4-1/2"COMPLETION TUBING 08:00 - 12:00 4.00 DRILL N RREP INT1 INSTALL NEW ANNULAR GUIDE ROD SEALS, PISTON SEALS&REINSTALL PISTON -CONT WORKING ON RIG PM'S -FINISH 4-1/2"TUBING 12:00 - 18:00 6.00 DRILL N RREP INT1 INSTALL ADAPTER RING AND ANNULAR CAP TO HYDRAULICALLY SEAT ANNULAR PISTON 18:00 - 20:00 2.00 DRILL N RREP INT1 REMOVE CAP&ADAPTER RING -INSTALL NEW SEALS ON ADAPTER RING, _ RE-INSTALL RING AND CAP. _ 20:00 - 22:30 2.50 DRILL N RREP INT1 FUNCTION TESTING ANNULAR -HYDRAULIC TESTS PERFORMED PER NOV SPECS 22:30 - 00:00 1.50 DRILL N RREP INT1 PRESSURE TESTING ANNULAR -PRESSURE TEST WITH 4"&4-1/2"TEST JOINTS -250 PSI LOW AND 3500 PSI HIGH TESTS.5 MIN CHARTED 4/14/2013 00:00 - 03:00 3.00 CEMT N RREP INT1 INSTALL WEAR BUSHING -INSTALL JOE'S BOX AND FLOW LINE. 03:00 - 04:00 1.00 CEMT N RREP INT1 PJSM FOR PULLING STORM PACKER PU RTTS RUNNING TOOL -RIH AND PULL RTTS PER HALLIBURTON REP LD RUNNING TOOL 04:00 - 06:00 2.00 CEMT N RREP INT1 TIH WITH PRODUCTION DRILLING BHA#5 -F/8,028'MD TO 10,680'MD -MONITORING TRIP VIA THE TRIP TANK. -FILLING PIPE EVERY 2000' 06:00 - 07:00 1.00 EVAL P INT1 MAD PASS DOWN F/10,680'MD TO 10,870' -227 GPM,40 RPM,1460 PSI,3-4K TQ Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 20 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 IX3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT I NPT Depth Phase Description of Operations (hr) (usft) 07:00 - 07:30 0.50 CEMT RREP N INT1 ROTATE AND RECIPROCATE F/10,775'MD TO 10,870'MD -CIRCULATE BOTTOMS UP -227 GPM,1460 PSI,40 RPM,3-4K TQ SPR'S:10,866'MD(8,754'TVD)-TIME=07:40, MW=8.6 PPG #1 MP-20/30 SPM=440/580 PSI #2 MP-20/30 SPM=460/620 PSI 07:30 - 09:00 1.50 CEMT P INT1 DRILL SHOE TRACK AND 20'OF NEW FORMATION TO 10,931'MD -250 GPM,1800 PSI ON/1600 PSI OFF -40 RPM,5K TQ -10-12K WOB P/U 189K,S/O 158K 09:00 - 10:00 1.00 CEMT P INT1 CIRCULATE BOTTOMS UP -250 GPM,1800 PSI -40 RPM, MONITOR WELL FOR 10 MIN—WELL STATIC 10:00 - 11:30 1.50 CEMT P INT1 PULL BACK INTO SHOE&PERFORM FIT TO 12.5 PPG EMW SURFACE PRESSURE TO 1782 PSI WITH SHOE TVD @ 8,787' MW 8.6 IN/8.6 OUT -3.5 BBLS PUMPED,3.5 BBLS RETURNED -INFINITE KICK TOLERANCE WITH 12.5 PPG EMW FIT SENT RESULTS TO TOWN ODE AND FOR APPROVAL, -AUTHORIZATION TO PROCEED RECEIVED FROM ODE WITH GREATER THAN 50 BBL KICK TOLERANCE 11:30 - 12:00 0.50 DRILL P PROD1 DRILL 6-1/8"PRODUCTION HOLE FROM 10,931'MD TO 10,942'MD(8,823'TVD) -250 GPM,1,770 PSI ON/1,600 PSI OFF -WOB=18-20K -MW=8.5 PPG IN/8.5 PPG OUT -P/U=194K,S/O=176K,ROT=180 AST=0.84 HRS,ART=.04 HRS,ADT=0.88 HRS TOTAL BIT HRS=0.88,TOTAL JAR HRS=0.88 TOTAL LOSSES FOR LAST 24 HRS=0 BBLS • 12:00 - 00:00 12.00 DRILL P PROD1 DRILL 6-1/8"PRODUCTION HOLE FROM 10,942'MD TO 11,369'MD,9,074'TVD -250 GPM,1,830 PSI ON/1,655 PSI OFF -40 RPM,TQ=5K ON/5K OFF -WOB=12-15K -MW=8.6 PPG IN/8.6 PPG OUT -P/U=205K,S/O=166K,ROT=182 AST=7.67 HRS,ART=1.01 HRS,ADT=8.68 HRS TOTAL BIT HRS=9.56,TOTAL JAR HRS=9.56 TOTAL LOSSES FOR LAST 24 HRS=0 BBLS SPR'S:10,961'MD(8,840'TVD)-TIME=13:30, MW=8.6 PPG #1 MP-20/30 SPM=640/760 PSI #2 MP-20/30 SPM=640/780 PSI Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 21 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 I End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 'T Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 4/15/2013 00:00 - 07:30 7.50 DRILL P PROD1 DRILL 6-1/8"PRODUCTION HOLE FROM 11,369'MD TO 11,627'MD 9062'TVD I-250 GPM,1,900 PSI ON/1,700 PSI OFF I -40 RPM,TQ=7K ON/6K OFF I -WOB=15-20K '-MW=8.6 PPG IN/8.6 PPG OUT I-P/U=194K,S/O=163K,ROT=176 AST=3.39 HRS,ART=1.31 HRS,ADT=4.7 HRS TOTAL BIT HRS=14.26,TOTAL JAR HRS= 14.26 TOTAL LOSSES FOR LAST 24 HRS=0 BBLS SPR'S:10,961'MD(8,840'TVD)-TIME=13:30, I MW=8.6PPG ; #1 MP-20/30 SPM=640/760 PSI 1 � I#2MP-20/30SPM=640/780 PSI , 07:30 - 09:00 1.50 DRILL P PROD1 !ROTATE AND RECIPROCATE F/11,535'MD TO 11,627'MD ' '-CIRCULATE 1-1/2 BOTTOMS UP -250 GPM,1900 PSI,40 RPM,3-4K TQ MONITOR THE WELL PRIOR TO PULLING OFF BOTTOM-WELL STATIC , SPR'S:11,627'MD(9,062'TVD)-TIME=09:00, MW=8.6PPG #1 MP-20/30 SPM=580/730 PSI #2 MP-20/30 SPM=570/730 PSI II 09:00 - 11:00 2.00 DRILL P I PROD1 1 BACK REAM OUT OF THE HOLE F/11,627'MD I I TO 10,870' - 250 GPM,1650 PSI,40 RPM,3-4K TQ 11:00 - 12:00 1.00 DRILL P PROD1 ROTATE AND RECIPROCATE F/10,775'MD TO 10,870'MD -CIRCULATE BOTTOMS UP - 250 GPM,1650 PSI,40 RPM,3-4K TQ MONITOR THE WELL PRIOR TO PULLING OUT OF THE HOLE-WELL STATIC 12:00 - 17:00 5.00 DRILL P PROD1 BLOW DOWN TOP DRIVE I POOH ON ELEVATORS FROM 10,775'MD TO -420'MD -MONITORING TRIP VIA THE TRIP TANK 17:00 - 18:00 1.00 DRILL P PROD1 MONITOR WELL PRIOR TO PULLING BHA THROUGH THE STACK -WELL STATIC. -POOH F/420'TO 127' -C/O PS21 SLIP INSERTS,LD BHA#5 PER SLB(DD)REP PJSM FOR PULLING THE RADIOACTIVE SOURCE FROM THE BHA -PULL SOURCE PER SLB PROCEDURE. 18:00 - 18:30 0.50 DRILL P PROD1 FINISH LAYING DOWN 6-1/8"PRODUCTION BHA#5 - F/127'TO SURFACE BIT GRADE:2-3-BT-A-E-I-WT-BHA -BIT IN GAUGE Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 22 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 1X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. WWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 18:30 - 22:00 3.50 DRILL P PROD1 PJSM FOR PICKING UP BHA#6 -PU/MU&RIH WITH 6-1/8"PRODUCTION BHA #6-PER SLB DD - REBUILT 6-1/8"HYCALOG PDC BIT, 4.75" MOTOR W/1.5 DEG BEND, IMPULSE AND ADN 475-RIH TO 958' -PJSM WITH SLB AND RIG CREW FOR LOADING THE SOURCE -LOAD SOURCE PER SLB PROCEDURE -CONTINUE RIH F/98'TO 1,300'FOR SHALLOW HOLE TEST FOR MWD TOOLS- GOOD TEST -200 GPM,690 PSI-GOOD TEST 22:00 - 00:00 2.00 DRILL P PROD1 TIH WITH 6-1/8"PRODUCTION BHA#6 F/1300' TO 4,749'MD -TIH ON 4"DP FROM THE DERRICK. MONITORING DISPLACEMENT VIA THE TRIP TANK FILLING EVERY 20 STANDS 4/16/2013 00:00 05:00 5.00 DRILL P PROD1 TIH WITH 6-1/8"PRODUCTION BHA#6 F/ 4,749'MD TO 11,627' -TIH ON 4"DP FROM THE DERRICK. MONITORING DISPLACEMENT VIA THE TRIP TANK -FILLING EVERY 20 STANDS 05:00 12:00 7.00 DRILL P PROD1 DRILL 6-1/8"PRODUCTION HOLE FROM 11,627'MD TO 12,103'MD 8,996'TVD -250 GPM,2,060 PSI ON -80 RPM,TQ=7K ON/6K OFF -WOB=9.5K -MW=8.6 PPG IN/8.7 PPG OUT -P/U=199K,S/O=160K,ROT=175K AST=.66 HRS,ART=3.18 HRS,ADT=3.84 HRS TOTAL BIT HRS=3.84,TOTAL JAR HRS=18.1 TOTAL LOSSES FOR TOUR HRS=6 BBLS SPR'S:12,103'MD(8,996'TVD)-TIME=11:45, MW=8.7 PPG #1 MP-20/30 SPM=640/760 PSI #2 MP-20/30 SPM=600/780 PSI 12:00 - 00:00 12.00 DRILL P PROD1 DRILL 6-1/8"PRODUCTION HOLE FROM 12,103'MD TO 12,671'MD 8,952'TVD -250 GPM,2,230 PSI ON/2,158 PSI OFF -80 RPM,TQ=7K ON/6K OFF -WOB=9K -MW=8.7 PPG IN/8.7 PPG OUT -P/U=200K,S/O=151K,ROT=170K AST=3.83 HRS,ART=3.50 HRS,ADT=7.33 HRS TOTAL BIT HRS=11.17,TOTAL JAR HRS=25.4 TOTAL LOSSES FOR TOUR HRS=0 BBLS SPR'S:12,577'MD(8,949'TVD)-TIME=21:15, MW=8.7 PPG #1 MP-20/30 SPM=610/780 PSI #2 MP-20/30 SPM=620/780 PSI NOTE:PLUGGED JETS F/12,320'MD T/12,470' MD W/200-700 PSI PUMP INCREASE Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 23 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad • Rig Name/No.:DOYON 25 Spud DateTme:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor.DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 4/17/2013 00:00 - 10:00 10.00 DRILL P • PROD1 DRILL 6-1/8"PRODUCTION HOLE FROM 12,671'MD to 13,205'MD 9,054"ND -TD'D HOLE SECTION -250 GPM,2,180 PSI ON/1,960 PSI OFF -80 RPM,TQ=9K ON/7K OFF -WOB=12K -MW=8.7 PPG IN/8.7 PPG OUT P/U=207K,S/O=158K,ROT=183K AST=227 HRS,ART=4.33 HRS,ADT=6.60 HRS TOTAL BIT HRS=17.77,TOTAL JAR HRS=32 10:00 - 12:00 2.00 DRILL P PROD1 ROTATE AND RECIPROCATE F/13,152'MD TO 13,205'MD CIRCULATE 1-1/2 BOTTOMS UP -250 GPM,1930 PSI,80 RPM,5-7K TQ MONITOR THE WELL PRIOR TO PULLING OFF BOTTOM(4-5"DROP) SPR'S:13,205'MD(9,054'TVD)-TIME=11:30, MW=8.7 PPG - #1 MP-20/30 SPM=590/750 PSI #2 MP-20/30 SPM=580/770 PSI LOSSES FOR TOUR:13 BBLS 12:00 - 12:30 0.60 DRILL P PROD1 BROOH FROM 13,152'TO 12,850' -251 GPM,1900 PSI,80 RPM,4K TQ -UP WT=200K,DOWN WT=145K 12:30 - 16:00 3.50 DRILL P PROD1 BROOH MAD PASSING FROM 12,850'TO 12,240' -251 GPM,1820 PSI,80 RPM,4K TQ 16:00 - 17:30 1.50 DRILL P PROD1 BROOH FROM 12,240'TO 11,590" -251 GPM,1820 PSI,80 RPM,4K TQ 17:30 - 20:30 3.00 DRILL P • PROD1 BROOH MAD PASSING FROM 11,590'TO 10,940' -251GPM,1811 PSI,40 RPM,5K TQ -UPWT=197K,DOWN WT=164K 20:30 - 22:00 1.50 DRILL P PROD1 ROTATE AND RECIPROCATE F/10,872'MD TO 10,772'MD -251 GPM,1744 PSI,80 RPM,6K TQ -UP WT=197K,DOWN WT=164K -PUMPED 3310 STROKES MONITOR THE WELL(STATIC) BLOW DOWN TOP DRIVE 22:00 - 00:00 2.00 DRILL P PROD1 CUT AND SLIP 88'DRILL LINE 4/18/2013 00:00 - 02:30 2.50 DRILL P PROD1 RIH TO TD ON ELEVATORS FROM 10,902'TO 13,1352' -66 FT/MIN IN OH -MONITORING TRIP VIA THE TRIP TANK -FILLING PIPE EVERY 2000' 02:30 - 04:00 1.50 DRILL P PROD1 REAM DOWN F/13,152'T/13,205'©250 GPM, 1850 PSI,80RPM ROTATE AND RECIP @ SAME FOR 1.5X B/U Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 24 of 24 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:DRL-ONSHORE(DON) Start Date:3/25/2013 End Date:4/18/2013 X3-01348-C:DRILL(8,270,952.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Data From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 04:00 - 05:30 1.50 DRILL P PROD1 DISP T/OBM AS FOLLOWS -75 BBLS 8.7 PPG BRINE @ 250 GPM,1870 PSI -25 BBLS 730 PPG LVT-200 BASE OIL -50 BBLS 9.6 PPG HI-VIS RHELIENT©1880 ICP/2150 FCP -438 BBLS 8.7 PPG RHELIENT-M OBM @ 2150 ICP/3030 FCP 05:30 - 07:30 2.00 DRILL P PROD1 "CBU X 2 @ 250 GPM,3030 PSI,80 RPM 07:30 - 09:30 2.00 DRILL P PROD1. POOH ON ELEVATORS F/13,205'T/10,870 INSIDE 7"SHOE -25K OVERPULL(@ 11,553'&11,498' -WIPED CLEAN 09:30 - 11:30 2.00 DRILL P PROD1 OPEN CIRC SUB,ROTATE AND RECIP WHILE CBU @ 400 GPM,3200 PSI;40 RPM CLOSE CIRC SUB 11:30 - 17:00 5.50 DRILL P PROD1 POOH ON ELEVATORS F/10,870 T/517'@ 100 FT/MIN 17:00 - 17:30 0.50 DRILL P PROD1 PJSM FOR UD BHA#6 MONITOR WELL(STATIC) C/O SUP INSERTS F/4"T/HAND SLIPS 17:30 - 20:00 2.50 DRILL P PROD1 POOH F/517'T/423'UD BHA#6 PJSM ON PULL NUCLEAR SOURCE PULL NUCLEAR SOURCE CONT POOH W/BHAAND LD SAME BIT GRADE 3-2-LT-N-X-1-PN-TD Printed 5/6/2013 10:26:46AM North America-ALASKA-BP Page 1 of 4 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:COM-ONSHORE(CON) Start Date:4/18/2013 End Date:4/22/2013 X3-01346-C:DRILL(3,667,378.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: ■ Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 4/18/2013 20:00 - 21:00 1.00 CASING P RUNPRD CLEAR AND CLEAN OBM&BHA FROM RIG FLOOR 21:00 - 23:00 2.00 CASING P RUNPRD RU TO RUN 4 1/2"PRODUCTION LINER -LINER RUN ASSEMBLY IN PIPE SHED AS PER RUNNING TALLY AND HALLIBUTRON REP 23:00 - 23:30 0.50 CASING P RUNPRD HELD PJSM ON RUNNING 4 1/2"PRODUCTION LINER W/DDI TP,DDI CASING HAND,BAKER AND HALLIBURTON REPS,WSLF,AND RIG CREWS 23:30 - 00:00 0.50 CASING P RUNPRD PU AND RUN 41/2"LINER SHOE TRACK CHECK FLOAT,OK 4/19/2013 00:00 - 00:30 0.50 CASING P RUNPRD CO SLIP INSERTS AND CHECK FLOATS -GOOD 00:30 - 06:30 6.00 CASING P RUNPRD RIH W/4.5"12.6#13 CR-80 HYD 521 AS PER RUNNING TALLY FROM 90'TO 2438' -MONITOR DISP VIA PIT 8 06:30 - 07:30 1.00 CASING P RUNPRD CHANGE OVER TO RIH ON DP -CO ELEVATORS PU LINER HANGER -INSTALL PAL-MIX -CO SLIP INSERTS TO HAND SLIPS -RD POWER TONGS AND FILL UP HOSE -MU X-OVER AND STAND OF DP 07:30 - 08:00 0.50 CASING P RUNPRD CIRC 1.5 LINER VOLUMES -3 BPM,600 PSI 600 STROKES -CHANGED OUT SLIP INSERTS TO 4" 08:00 - 14:00 6.00 CASING P RUNPRD RIH W/4"DP FROM DERRICK FROM 2,472'TO 10,839' -FILL EVERY 1000'@ 30 SPM AND 800 PSI 14:00 - 14:30 0.50 CASING P RUNPRD FUNCTION TEST BOPE -ANNULAR CLOSE TIME:26 SEC -UPPER PIPE RAMS CLOSE TIME 18 SEC -LOWER PIPE RAMS CLOSE TIME:17 SEC 14:30 - 15:30 1.00 CASING P RUNPRD STAGE PUMPS UP TO 3 BPM,820 PSI -OBTAIN PARAMETERS @ 10&20 RPM:6K TO EA -CIRC 1.5 LINER/DP VOLUMES(d 3 BPM,780 PSI -TOTAL STROKES:1,901 -PU:192K,SO:141K 15:30 - 18:30 3.00 CASING P RUNPRD RIH W/4"DP FROM DERRICK FROM 10,839' TO 13,205' -FILL PIPE EVERY 1000' -WORKING THROUGH TIGHT SPOTS -PU SINGLE AND TAG ON DEPTH @ 13,205' -PU 20'AND SLACK OFF TO CONFIRM -PU WT:237K,SO WT:135K -LD SINGLE TO SHED -LINER 2'OFF BOTTOM @ 13,203' 18:30 - 21:30 3.00 CASING P RUNPRD STAGE PUMPS TO 1.2 BPM,740 PSI -PACKING OFF AT HIGHER RATES -TOTAL STROKES:2000 Printed 5/6/2013 10:28:09AM North America-ALASKA-BP Page 2 of 4 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:COM-ONSHORE(CON) Start Date:4/18/2013 End Date:4/22/2013 X3-01348-C:DRILL(3,667,378.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:00AM Rig Release:4/22/2013 Rig Contractor.DOYON DRILLING INC. UWI: Active datum:Z-71 actual @96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 21:30 - 00:00 2.50 CASING P RUNPRD PUMP 25 BBL 8.7 PPG OBM HI-VIS PILL @1.2 BPM -DROP 1.75"NEUTRAL WEIGHT BALL -CHASE WITH REMAINING 10 BBLS OF PILL -CONT TO PUMP 8.7 PPG OBM -BALL ON SEAT @ 1330 STROKES -PRESSURE UP TO 1500 PSI,HELD FOR 1 MIN PRESSURE UP TO 3500 PSI 4/20/2013 00:00 - 00:30 0.50 CASING P RUNPRD PRESSURE TEST INSIDE OF 4.5" PRODUCTION LINER PRESSURE UP TO 3550 PSI -OVER 30 MINS NOTED PRESSURE INCREASE FROM 3,550 PSI TO 4,040 PSI CONTACTED ODE AND WTL -ALLOWED TO PROCEDE 00:30 - 01:30 1.00 CASING P RUNPRD SET LINER TOP PACKER AS PER BAKER REP -SLACK OFF 100K TO ENSURE LINER SET -INCREASE PRESSURE TO 4,230 PSI,SLACK OFF TO 90K,BLEED OFF -PU 200KAND ADDITIONAL 7' -SO,OBSERVED GOOD SURFACE INDICATION OF SHEAR AND SET OF ZXP LINER TOP PACKER @ 128K,CONT SO TO 106K -PU 7',ROTATE @ 10 RPM,7K TQ,SO 110K TO CONFIRM SET. -PU 8'TO EXPOSE CIRC PORTS -CIRC THRU PORTS @ 1.5 BPM,350 PSI 01:30 - 03:00 1.50 CASING P RUNPRD PRESSURE TEST IA-7"CASING X 4.5"LINER TOP PACKER AND 4.5"LINER -LOW 250 PSI FOR 5 CHARTED MINS -HIGH 3500 PSI FOR 30 CHARTED MINS -1ST 15 MIN LOST 54 PSI -2ND 15 MIN LOST 20 PSI -GOOD TEST -CONTACTED WTL -ALLOWED TO PROCEDE -PU LINER RUNNING TOOL FROM LINER TOP 03:00 - 04:30 1.50 CASING P RUNPRD DISPLACED TO BRINE -35 BBLS HI-VIS 8.7 PPG BRINE SPACER W/ 2.5 LB/BBL FLOZAN AND 5%DEEP CLEAN @ 5 BPM,1,160 PSI -45 BBLS 8.7 PPG BRINE CLEANING SPACER W/10%DEEP CLEAN @ 5 BPM,1,240 PSI -DISPLACED TO 8.7 PPG BRINE @ 12 BPM, ICP:3,200 PSI,FCP:2,460 PSI -MONITORED WELL 10 MINS(STATIC) 1 04:30 - 05:30 1.00 CASING P RUNPRD CLEAN UNDER SHAKERS AND PREP PITS TO POOH -SIM OPS:SERVICE AND INSPECT TOP DRIVE AND BLOCKS 05:30 - 10:00 4.50 CASING P RUNPRD POOH LD 104 DOUBLES FROM 10,737'TO 4,333' 10:00 - 11:00 1.00 CASING P RUNPRD RIH W/27 STANDS F/DERRICK FROM 4,233' TO 6,766' 11:00 - 17:00 6.00 CASING P RUNPRD POOH LD SINGLES FROM 6,766'TO SURFACE 17:00 - 17:30 0.50 CASING P RUNPRD LD LINER RUNNING TOOL,VISUALLY CONFIRM DOG SUB SHEAR. 17:30 - 18:30 1.00 RUNCOM P RUNCMP PULL WEAR BUSHING AND PERFORM DUMMY RUN Printed 5/6/2013 10:28:09AM North America-ALASKA-BP Page 3 of 41 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:COM-ONSHORE(CON) Start Date:4/18/2013 End Date:4/22/2013 X3-01348-C:DRILL(3,667,378.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1:00:OOAM Rig Release:4/22/2013 Rig Contractor.DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Date From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 18:30 - 20:30 2.00 RUNCOM P RUNCMP RU TO RUN TUBING 20:30 - 21:00 0.50 RUNCOM P RUNCMP 'POSITION JEWELRY IN SHED 21:00 - 00:00 3.00 RUNCOM P RUNCMP PU AND RUN 4.5"12.6#13-CR85 VT TUBING WITH I-WIRE FROM SURFACE TO 982' -PJSM W/WSL,THIRD PARTY HANDS AND RIG HANDS BAKERLOC ALL CONNECTIONS BELOW PACKER 4/21/2013 00:00 - 17:30 17.50 RUNCOM P RUNCMP CONTTO RIH W/4.5"12.6#13-CR85 VAMTOP COMPLETION TUBING W/I-WIRE -TEST I-WIRE EVERY 1000' -TAG UP ON TBR @ 10,751'PU=156K, SO=128K -SET DOWN 5K,PU AND REPEAT TO CONFIRM -LD JOINTS#249,248,247,246 -PU PUPS TO SPACE OUT(19.62',9.73',5.74') -RIH W/JNT#246,PU AND MU HANGER/LANDING JNT 17:30 - 18:00 0.50 RUNCOM P RUNCMP PERFORM CONTINUITY TEST,TERMINATE I-WIRE,INSTALL PLUG AND PRESSURE TEST 18:00 - 18:30 0.50 RUNCOM P RUNCMP LAND TUBING ON HANGER AND RILDS, •TORQUE SAME,PACKER TOP SET AT 10,622' 18:30 - 20:00 1.50 RUNCOM. P RUNCMP CLEAR AND CLEAN FLOOR,RD FROM TUBING RUN,RU CIRC LINES 20:00 - 22:30 2.50 RUNCOM P RUNCMP -PT SURFACE LINES TO 3500 PSI -PUMP 166 BBLS 80 DEG 8.7 PPG BRINE -FOLLOWED BY 77 BBLS 80 DEG 8.7 PPG BRINE W/CORROSION INHIBITOR -CHASED BY 125 BBLS 80 DEG 8.7 PPG BRINE -PUMPED 5 BBLS DOWN TUBING TO CLEAN RHC-M PROFILE 22:30 - 00:00 1.50 RUNCOM P RUNCMP DROP BALL&ROD AND PRESSURE TEST -PRESSURE TEST TUBING,LOW 250 PSI FOR 5 MINS,HIGH 3500 PSI FOR 30 MINS. —BLEED PRESSURE IN TBG TO 1500 PSI, -TEST 4 1/2"X 7"ANNULUS AND PACKER,250 PSI LOW/3500 PSI HIGH AND CHART, SUCCESSFUL TEST -WO APPROVAL FROM TL. 4/22/2013 00:00 - 01:00 1.00 RUNCOM P RUNCMP TEST 4 1/2"X 7"ANNULUS AND PACKER,250 PSI LOW/3500 PSI HIGH AND CHART, SUCCESSFUL TEST 01:00 - 03:00 2.00 RUNCOM P RUNCMP PULL LANDING JT, -DRY ROD IN TWC -INSTALL LANDING JT -CHART TEST BELOW TWC 250 PSI 5 MIN LOW/30 MIN 3500 PSI HIGH,OK. -CHART TEST ABOVE TWC 250 PSI 5 MIN LOW/5 MIN 3500 PSI HIGH,OK. 03:00 - 06:00 3.00 BOPSUR P RUNCMP NIPPLE DOWN BOP -DSA,SPACER SPOOL -SKID BOP -PULL RISER. Printed 5/6/2013 10.28:09AM • North America-ALASKA-BP Page 4 of 4 Operation Summary Report Common Well Name:Z-71 AFE No Event Type:COM-ONSHORE(CON) Start Date:4/18/2013 End Date:4/22/2013 X3-01348-C:DRILL(3,667,378.00) Project:Prudhoe Bay Site:PB Z Pad Rig Name/No.:DOYON 25 Spud Date/Time:3/28/2013 1.00:00AM Rig Release:4/22/2013 Rig Contractor:DOYON DRILLING INC. UWI: Active datum:Z-71 actual©96.60usft(above Mean Sea Level) Data From-To Hrs Task Code NPT NPT Depth Phase Description of Operations (hr) (usft) 06:00 - 12:00 6.00 WHSUR P RUNCMP PU/INSTALL XMAS TREE -FMC REP TEST VOID 250 PSI LOW 5 MIN, 5000 PSI HIGH 5 MIN,OK -TEST TREE AND ADAPTER FLANGE 25 PSI LOW 5 MIN, 5000 PSI HIGH 10 MIN -INSTALL LUBRICATOR AND CHART TEST 250 PSI LOW 5MIN, 3500 HIGH 5 MIN -REMOVE TWC 12:00 - 14:30 2.50 WHSUR P RUNCMP FREEZE PROTECT -REVERSE IN 72 BBLS OF DIESEL -ALLOW TBG/ANNUUS TO U-TUBE FOR 1 HOUR 14:30 - 17:00 2.50 WHSUR P RUNCMP INSTALL BPV,TEST BPV,INNER OA VALVE 250 PSI LOW 5MIN, 3500 PSI 30 MIN, OK 17:00 - 18:00 1.00 WHSUR P RUNCMP RIG DOWN TEST LINES, REMOVE ANNULUS VALVES,INSTALL FLANGES AND GAUGES, RELEASE RIG a 18:00 HRS Printed 5/6/2013 10:28:09AM 3 " Schiumberger AOGCC Drilling&Measurements MWD/LWD Log Product Delivery - Customer BP Exploration(Alaska)Inc. Dispatched To: Christine Shartzer(AOGCC) Well No Z-71 Date Dispatched: 26-Apr-13 Installation/Rig Doyon25 Dispatched By: E.Greblova Data No Of Prints No of CDs Surveys 1 2"MD Log 1 7 TVD Log 1 EOW letter 1 Data CD 1 Please sign and return to: Analisa Steger Received By: ���r L,� � BP Exploration(Alaska)Inc. Petrotechnical Data Center(LR2-1) 900 E.Benson Blvd. Anchorage,Alaska 99508 Fax:907-564-4005 e-mail address:analisa.stegerCtbp.com LWD Log Delivery V1.0,01/22/2010 RECEIVED MAY 062013 Drilling&Measurements - CC 2525 Gambell Street.Suite 400 Anchorage AK 99503 Schlumberger Tel(907)273-1700 Fax(907)561-8317 '�.A�_ 0 2_5 Date: April 26,2013 Well Name: Z-71 Company: BP Exploration(Alaska),Inc. API Number: 50-029-23484-00-00 AFE Number: X3-01348-C:DRILL Location: X=600,178.47 US Feet;Y=5,959,239.95 US Feet Field: Prudhoe Bay Rig: Doyon 25 Drilling and Measurements Field Support: Operations Manager, Ankur Prakash Field Service Manager, Hector Echeto Drilling and Measurements Field Crew: Cell Managers, Carlos Ilizaliturri Elena Greblova Cell Engineer, Mahmoud Farrag Eric Pennington SERVICES PROVIDED Z-71 Services Services Dates Depth Intervals Directional Survey Service 28-Mar-13 to 17-Apr-13 505 feet to 13205 feet TeleScope*Direction&Inclination 28-Mar-13 to 09-Apr-13 505 feet to 10911 feet VISION*(Resistivity,Gamma Ray) 28-Mar-13 to 09-Apr-13 505 feet to 10911 feet IMPulse*Direction&Inclination 11-Mar-13 to 17-Apr-13 9863 feet to 13205 feet VISION*(Neutron,Density Azimuthal) 05-Mar-13 to 17-Apr-13 3611 feet to 13205 feet OPERATING STATISTICS Total MWD Pumping Time: 222.4 hours Total LWD Pumping Time: 222.4 hours Total MWD Time Below Rotary: 385.5 hours Total LWD Time Below Rotary: 385.5 hours Total MWD Depth Interval: 12820 feet Total LWD Depth Interval: 12820 feet Total MWD Runs: 5 Total LWD Runs: 5 Total JOB PERFORMANCE Directional Z-71 The final MWD survey point was located at 13152.36 feet with an inclination of 80.85 degrees and an azimuth of 183.00 degrees. This direction and inclination was projected from the final survey point to TD, which resulted in the following bottom-hole location. Measured Depth: 13205 feet True Vertical Depth: 9053.99 feet 1 Formation Evaluation Schlumberger 12-1/4 inch Surface Section: The 12.25"surface hole section of the well was drilled from 45 feet to 3374 feet MD in three runs.On the first run the well was drilled from 45 feet to 505 feet MD with dumb iron and motor.The BHA was pulled out to pick up smart tools.On the second run,the well was drilled from 505 feet to 1976 feet MD. The BHA was pulled out to change the motor bend. On third run,the well was drilled from 1976 feet to 3374 feet MD. A motor was used for directional control during the runs.Resistivity and Gamma Ray data were supplied in real-time and from memory once the tools were retrieved. The final measured bottom-hole temperature was 70 degrees Fahrenheit. 8-3/4 inch Intermediate Section: The intermediate hole section of the well was drilled from 3374 feet to 10911 feet MD in one run. A motor was used for directional control during the run. Resistivity, Gamma Ray, Azimuthal Density,Neutron and APWD data were supplied in real-time and from memory once the tools were retrieved. The final measured bottom-hole temperature was 159 degrees Fahrenheit. 6-1/8 inch Production Section The production lateral section of the well was drilled from 10911 feet to 13205 feet MD in two runs. A motor was used for directional control during the runs. Directional Resistivity, Gamma Ray, Azimuthal Density, and Neutron data were supplied in real-time and from memory once the tools were retrieved. The final measured bottom-hole temperature was 167 degrees Fahrenheit. Innovation Implementing compressed ORION data points in our Real-Time frames when high tier formation evaluation services are requested or high ROPs are anticipated is recommended. ORION data compression techniques will provide excellent data density for all evaluation needs allowing more data channels to be q P Y g se n t uphole a n d g r eate r log detail to catc h fine geological features. s. Schlumberger Oilfield Services — Drilling & Measurements appreciates the opportunity to provide BP Exploration(Alaska)with MWD and LWD services. 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(Yy� m vmi N r.m N M N g W r W F 1 Wiii 8mimm m8 !close ro N� a e 8E8 22; nN <� 88 8 r°-zo� °R° ?gi E mmmmm 88222 mm g R gmo8 g ~E 8 e2 az Y A Q G- _,, o 2 m i 8 w y 9 0 2i:'-7 O"i" - e" m O 3_ N pp NFpp N 4 D g2GA n OO p p t it O ip m l O m 2 maaIA,eN f2,74 8 d N s LL C > m a N ee en 0 2YC- ,'v>�s 4.P1 ,7 88 ' _ 8 5EavIr ppfoCC pmp 22N tcm N N :,282 t t72 ew O O Op O .6 J 7 I m e (V U o g O E 0i Ea T m E t t V 4.1 0 M P70 .2 /3 _ a Ferguson, Victoria L (DOA) From: Ferguson,Victoria L(DOA) Sent: Tuesday, April 16, 2013 10:37 AM To: 'Roach Frank' Subject: Permit to Drill PBU W-51(PTD 213-048) A variance is granted as follows: Flow paddle waived for<1000' per 20AAC25.033(j). Please include this with the PTD. Victoria Ferguson Senior Petroleum Engineer State of Alaska Oil&Gas Conservation Commission 333 W.7th Ave,Ste 100 Anchorage,AK 99501 Work: (907)793-1247 victoria.ferquson a(�alaska.gov 1 Pic,( Ph Z130 2507 Regg, James B (DOA) From: Ogclnspector(DOA sponsored) — Sent: Wednesday, April 03, 2013 12:29 PM To: Schwartz, Guy L (DOA) Zf 14(l3 Cc: Regg, James B (DOA); DOA AOGCC Prudhoe Bay; Ferguson, Victoria L (DOA) Subject: Re: Remedial Cementing Guidance Bulletin Just a short report on the top job last night.Tubing RIH between conductor and surface casing to a depth of 130 ft. Allowed them to pull out about 6 ft to R/U cement line.The lead cement for their surface casing cement job was 11 ppg but the top out was ASL 10.7 ppg. My reasoning for allowing this difference is that if the top job has been approved the cement has also been approved.They had to use pressure balance scales to weigh this ASL at 10.7 ppg going in and we had to use the same to see 10.7 out. 10.7 ppg after about. 70 bbls. Do not reply directly to this e-mail or doa.Ogc.inspector @Alaska.gov Please reply to AOGCC.inspectors @Alaska.gov or Doa.AOGCC.prudhoe.bay @Alaska.gov Alternate contact numbers 907-659-2714(NS office) 907-793-1236 (Jim Regg) On Apr 3, 2013, at 10:26, "Schwartz, Guy L(DOA)"<guv.schwartz @alaska.gov>wrote: Jim, Talked to McMains... will set up way to track top jobs in RBDMS. Will be und= a subset of the Cement sqz code RSQZ Guy Schwartz Senior Petroleum Engineer AOGCC 907-444-3433 cell 907-793-1226 office From: Regg, James B (DOA) Sent: Tuesday, April 02, 2013 5:07 PM To: DOA AOGCC Prudhoe Bay; Schw.. r, Guy L(DOA); Ferguson, Victoria L (DOA) Subject: Remedial Cementing Gu"•ance Bulletin Attached is for review and c• ment before proposing to Commissioners. Thank you. Jim Regg AOGCC 333 W.7th Ave,S ' e 100 Anchorage,AK ••501 907-793-12 1 PrD .713 —025 Ferguson, Victoria L (DOA) From: Ferguson,Victoria L(DOA) Sent: Tuesday,April 02, 2013 2:43 PM To: 'Mallery, Joshua' Cc: Schwartz, Guy L(DOA); Regg, James B(DOA) Subject: RE: Z-71 Surface Top Job(PTD 213-025) Joshua, You have approval to proceed with a surface top job as described. Thanx, Victoria From: Mallery,Joshua jmailto:Joshua.Mallery @BP.coml Sent: Tuesday, April 02, 2013 9:59 AM To: Ferguson, Victoria L(DOA) Subject: FW: Z-71 Surface Top Job FYI Thanks, Joshua Mallery 907.564.5545 (Office) 907.227.2035 (Cell) From: Mallery, Joshua Sent:Tuesday, April 02, 2013 7:55 AM To: Schwartz, Guy L(DOA) (guy.schwartz(a)alaska.gov) Subject: FW: Z-71 Surface Top Job As a follow-up, the rig has detected cement^'30' from the top of the conductor. Small OD conduit was ran in the flutes of the hanger and when it was pulled out, there was cement on the outside of the conduit that corresponded to a depth of—30'. Thanks, Joshua Mallery 907.564.5545 (Office) 907.227.2035 (Cell) From: Mallery, Joshua Sent:Tuesday, April 02, 2013 7:09 AM To: Schwartz, Guy L(DOA) (guy.schwartz(aalaska.gov) Subject: Z-71 Surface Top Job 1 „ Guy, This is a notification that Doyon 25 on Z-71 intends to perform a surface top job with 1” pipe. Late evening 4/1/2013, Doyon 25 pumped the primary cement job on Z-71. When the plug bumped, no cement had made it to surface, although we did receive contaminated spacer at surface.There were 100 bbls of spacer pumped prior to cement which lets us estimate that the cement is within 100 bbls from surface. Thanks, Joshua Mallery BPX(Alaska) Drilling Engineer 907.564.5545 (Office) 907.227.2035 (Cell) Joshua.Mallery(a@bp.com 2 w 00 P.'\\ THE STATE Alaska Oil and Gas �� �'� °f� ris� Conservation Commission rh GOVERNOR SEAN PARNELL 333 West Seventh Avenue OVP Anchorage, Alaska 99501-3572 A* Main: 907.279.1433 Fax: 907.276.7542 Ken Allen Engineering Team Leader BP Exploration(Alaska), Inc. P.O. Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Prudhoe Bay Oil Pool, PBU Z-71 BP Exploration (Alaska), Inc. Permit No: 213-025 Surface Location: 4431' FSL, 2497' FEL, SEC. 19, T11N, R12E, UM Bottomhole Location: 1768' FNL, 649' FWL, SEC. 29, T11N, R12E, UM Dear Mr. Allen: Enclosed is the approved application for permit to drill the above referenced development well. 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, Cathy . Foerster (4s---- Chair DATED this �� day of March, 2013. STATE OF ALASKA RECEIVED AL) 1 OIL AND GAS CONSERVATION COMI ;ION FEB 15 2012 PERMIT TO DRILL 20 AAC 25.005 AOGCC 1 a.Type of work: 1 b.Proposed Well Class: ®Development Oil •❑Service-Winj ®Single Zone • 1 c.Specify if well is proposed for: ®Drill , ❑Lateral ❑Stratigraphic Test ❑Development Gas ❑Service-Supply ❑Multiple Zone ❑Coalbed Gas ❑Gas Hydrates ❑Redrill ❑Reentry ❑Exploratory ❑Service-WAG ❑Service-Disp ❑Geothermal ❑Shale Gas 2.Operator Name: 5. Bond ®Blanket ❑Single Well 11.Well Name and Number: BP Exploration (Alaska) Inc. Bond No 6194193 • PBU Z-71 - 3. Address 6.Proposed Depth: 12.Field/Pool(s) P.O. Box 196612,Anchorage,Alaska 99519-6612 MD 13294' ND 9057' Prudhoe Bay/Prudhoe Bay . 4a.Location of Well(Governmental Section): 7.Property Designation(Lease Number): Surface: ADL 028262&047453 • 4431' FSL,2497'FEL, Sec. 19,T11N, R12E, UM • Top of Productive Horizon: 8.Land Use Permit: 13.Approximate Spud Date: 483'FSL,907'FWL, Sec.20,T11N, R12E, UM March 25,2013 Total Depth 9.Acres in Property: 14.Distance to Nearest Property: 1768'FNL,649'FWL, Sec. 29,T11N, R12E, UM 2560 6300' - 4b. Location of Well(State Base Plane Coordinates-NAD 27): 10.KB Elevation above MSL: 96.8' • feet 15.Distance to Nearest Well Open Surface: x 600178 • y-5959240• Zone- ASP4 GL Elevation above MSL: 56' . feet to Same Pool: 1200' • 16.Deviated Wells: Kickoff Depth: 300' feet 17.Maximum Anticipated Pressures in psig(see 20 AAC 25.035) Maximum Hole Angle: 98 degrees Downhole: 3585 Surface: 2870 - 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) 20" 94# H-40 80' Surface Surface, 121' 121' 260 sx Arctic Set(Approx.) 12-1/4" 9-5/8" 40# L-80 BTC 3333' Surface Surface 3333' - 3137' 1569 sx DeepCrete,404 sx Class'G' 8-3/4" 7" 26# L-80 VamTop 10876'_Surface Surface 10876' 8742' 699 sx LiteCrete, 99 sx Class'G' 6-1/8" 4-1/2" 12.6# 13CR-85 Hydril 2568' 10726 8606' 13294' 9057' Uncemented Slotted Liner,Swell Packers 19. PRESENT WELL CONDITION SUMMARY(To be completed for Redrill and Re-entry Operations) Total Depth MD(ft): Total Depth ND(ft): I Plugs(measured): Effective Depth MD(ft): Effective Depth TVD(ft): Junk(measured) Casing Length Size Cement Volume MD ND Conductor/Structural Surface Intermediate Production Liner Perforation Depth MD(ft): Perforation Depth ND(ft): 20.Attachments: ®Property Plat ®BOP Sketch ®Drilling Program ❑Time vs Depth Plot ❑Shallow Hazard Analysis ®Diverter Sketch ❑Seabed Report ®Drilling Fluid Program ®20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date 22. I hereby certify that the foregoing is true and correct: Contact Joshua Mallery,564-5545 Printed Name Ken Allen Title Engineering Team Leader Email Joshua.Mallery©bp.com Signature ,,_.' C�--•� Phone 564-4366 Date //.s//3' Commission Use Only Permit To Drill • API Number: _, - E,L ermit Approv I De See cover letter for Number: -Z/ C,%G. 50-0Z °'/,DYC 'JtI\\V? other requirements: Conditions of Approval: If box is checked,well may not be used to explore for,test,or produce coalbed methane,gas hydrates,or gas 13/ contained shales: Other: 3c n Ln- J 71-0 355-G ) /)5 L Samples Req'd 13 yes ❑No Mud Log Req'd: Oyes d No P / H2S Measures: ❑/Yes ❑Flo Directional Survey Req'd: [ Yes 0 No r/h rA} �> A G!colt G V G� Spacing exception req'd: ❑Yes No inclination-only svy Req'd: ❑Yes D slo - vv IOb() pew 2OAAC 25 . 033 (J ) APPROVED BY APPROVED BY / / /D/� l(yj COMMISSIONER THE COMMISSION Date 3 -L� -!'3 Form 10-401 Revised 10/ 0 i p mit is valid for 24 months from the date of approval(20 AAC 25.005(g)) su Form and Attachments In Duplicate 1 P 'fL 1V�� vi_P 3/7/13 `' `'; 6 - �� .z.2/• 1 op To: Alaska Oil &Gas Conservation Commission From: Joshua Mallery, ODE Date: February 4, 2013 Re: Z-71 Permit to Drill The Z-71 well is scheduled to be drilled by Doyon 25 in March 2013. The grassroots well is a horizontal producer targeting the Ivishak Zone 4 North of Z-pad. The planned well has three hole sections utilizing the Ultra Slim hole well design. Surface casing will be set in the SV1. The Intermediate hole is planned as a casing string which top sets the Sag River formation. The production interval will be completed with a cementless liner using sliding sleeves and swell packers. The liner is designed to allow selective production along the horizontal lateral to maximize oil recovery and minimize intervention requirements. The maximum anticipated surface pressure from the Ivishak/Sag with a full column of gas from TD to surface is—2721 psi (assumes 7.98 ppg as max pore pressure). This well will be drilled by Doyon 25 . using their 5000 psi four preventer BOP stack(3 rams and an annular). The BOP rams and annular will be tested to 3500 psi. A detailed operations summary is included with the permit application. Below is a brief summary of planned drilling operations: 1. Move in Doyon 25 and function test diverter. 2. Drill 12-1/4" surface hole to—3333 ft MD. - 3. Run 9-5/8"surface casing and cement to surface. 4. Nipple up BOPE and test. 5. Pressure test surface casing to 3500 psi. Drill out shoe and perform LOT. 6. Drill 8-3/4" intermediate hole to top of the Sag River at—10,876 ft MD. . 7. Run 7"casing and cement to—650'TVD above SB_Na Top. Pressure test casing to 3500psi. 8. Drill out of intermediate shoe and perform FIT. 9. Drill 6-1/8" horizontal production hole through Zone 4 of the Ivishak to TD at—13,294 ft MD. 10. Run a 4-1/2", chrome, production liner with approximately 14 swell packers and 12 sliding sleeves. 11. Pressure test liner top packer to 3500 psi 12. Run 4-1/2"chrome completion tubing. Sting into liner tieback sleeve and set production packer. 13. Pressure test the tubing and the inner annulus to 3500 psi each. 14. Rig down and move off the well. In addition to a planned well summary, a directional plan and proposed completion diagram is attached to the permit application. If there are any questions concerning information on Z-71, please do not hesitate to use the contact information below. Joshua Mallery Office: 907-564-5545 Cell: 907-268-7299 Home: 713-851-2298 Email: Joshua.Mallery@bp.com Z-71 PTD Page 1 2/4/2013 Planned Well Summary Well Z-71 '/ Well Oil Producer Target Ivishak Type Objective Zone 4 Current Status Grass Roots Well - Conductor Currently Installed Estimated Start Date: 3/25/2013 • Time to Complete: 34.5 Days Surface Northing Easting Offsets TRS Location 5959240 600178 4430' FSL /2497' FEL 11N 12E sec 19 Northing Easting TVDss Offsets TRS Tgt 1 5955340 603650 -8640' 484' FSL/4372' FEL 11N 12E sec 20 TSGR Tgt 2 5954700 603580 -8940' 5124' FSL /4453' FEL 11N 12E sec 29 Invert Tgt 3 5953795 603480 -8850' 4221' FSL /4569' FEL 11N 12E sec 29 Revert BHL 5953085 603430 -8960' 3511' FSL /4631' FEL 11N 12E sec 29 Planned KOP: 300' MD/203' TVDss Planned TD: 13,294' MD/8960' TVDss Rig: Doyon 25 BF-RT: 40.8' RTE (ref MSL): 96.8' • Directional — Schlumberger P7 KOP: I 300' MD Maximum Hole Angle: -55° in the 8-3/4" intermediate section -98° in the 6-1/8" production section Close Approach Wells: All wells pass major risk criteria. Survey Program: Surface to-500 ft MD= GYD-GC-SS (single shot gyro) -500 ft MD to TD = MWD+IFR+MS Nearest Property Line: 6,300 ft Nearest Well within Pool: -1200 ft-from Z-34i Z-71 PTD Page 2 2/4/2013 Formation Tops & Pore Pressure Estimate (SOR) Estimated Minimum Most Likely Maximum Formation Formation Top Pore p Pore Pressure Pore Pressure (TVDss) Pressure (EMW ppg) (EMW ppg) (EMW ppg) G1 255 8.35 8.40 8.45 f"L' SV6 1030 8.35 8.40 8.45 EOCU 1600 8.35 8.40 8.45 SV5 1680 8.35 8.40 8.45 BPRF 1805 8.35 8.60 8.60 SV4 1805 8.35 8.60 8.60 SV3 2290 8.35 8.60 8.60 SV2 2495 8.35 8.60 8.60 SV1 2810 8.35 8.60 9.00 9 5/8"Surface Csg 3040 8.35 8.60 9.00 UG4 3080 8.35 8.70 9.00 UG4A 3120 8.35 8.70 8.80 UG4A 3120 8.35 8.70 8.80 UG3(Faulted) 3440 8.35 8.70 8.80 Fault#1 (HSF) 3510 8.35 8.70 8.80 UG1 3800 8.35 8.70 8.80 UG_Ma 4090 8.35 8.70 8.80 UG_Mb1 4140 8.35 8.70 8.80 UG_Mb2 4190 8.35 8.70 8.80 UG_Mc 4255 8.35 8.70 8.80 SB_Na 4330 8.45 8.70 8.70 SB_Nb 4350 8.45 8.70 8.70 SB_Nc 4395 8.45 8.70 8.70 SB_OA 4510 8.45 8.70 8.70 SB_OBd 4700 8.45 8.70 8.70 SB_OBf Base 4860 8.45 8.70 8.70 CM-2 5245 8.45 8.70 8.70 q,Ce Top OverPressure 5890 9.40 9.50 10.00 /6•4' CM-1 5930 9.40 10.00 10.20 0, TLBK 6245 9.40 10.00 10.70 THRZ 6415 9.40 10.00 10.30 TKLB 6665 9.40 10.00 10.30 TKC4 6670 6.40 10.20 10.40 TKB/LCU 6710 8.45 10.00 10.40 Fault#2 6730 9.60 10.00 10.30 TMLV 6760 9.60 10.00 10.30 TKNG 7435 9.60 10.00 10.50 TJG 7475 9.60 10.00 10.50 TJF 7790 9.60 10.00 10.50 TJE 8025 9.60 10.00 10.50 TJD 8220 9.60 10.00 10.50 TJC 8430 9.60 10.00 10.50 TJB 8490 9.60 10.20 10.50 TJA 8565 9.60 10.20 / 10.50 ,,' . TSGR 8640 7.14 7.98 9.62 ,� s 7" Intermed Csg 8645 7.14 7.98 9.62 a`_. o , i ,'s Z-71 PTD Page 3 2/4/2013 •L/ 13 TSHA 8670 7.12 7.96 9.70 PGOC 8780 7.12 7.89 9.70 TEIL 8785 7.12 7.88 9.70 TSAD (46P) 8820 7.05 7.87 9.00 45N 8840 7.05 7.87 9.00 44N 8875 7.05 7.87 9.00 43N 8910 7.05 7.87 9.00 42N 8935 7.05 7.88 9.00 POWC 8960 7.05 7.89 9.00 41N 8970 7.05 7.89 9.00 41N (invert) 8975 7.05 7.89 9.00 42N (invert) 8945 7.05 7.88 9.00 43N (invert) 8920 7.05 7.88 9.00 44N (invert) 8890 7.05 7.88 9.00 Fault#4 8870 7.05 7.88 9.00 45N (invert) 8865 7.05 7.88 9.00 TSAD (invert) 8850 7.05 7.88 9.00 Fault#5 8860 7.05 7.88 9.00 TSAD (revert) 8880 7.05 7.88 9.00 POWC 8900 7.05 7.88 9.00 45N (revert) 8910 7.05 7.88 9.00 44N (revert) 8930 7.05 7.88 9.00 43N (revert) 8950 7.05 7.89 9.00 TD 8960 7.05 7.89 1 9.00 Casing/Tubing Program Hole Casing/ Wt/Ft Grade Conn Burst Collapse Length Top(ft) Bottom (ft) Size Tbg O.D. (psi) (psi) (ft) MD/TVDss MD/TVDss - 20" 94# H-40 - 1530 520 80 Surface 121/80 12-1/4" 9-5/8" 40# L-80 BTC 5750 3090 3333 Surface 3333/3040 8-3/4" 7" 26# L-80 VaHC°p 7,240 5,410 10876 Surface 10876/8645 6-1/8" 4 %2" 12.6# 13Cr-85 Hydril 8,430 7,500 2568 10726/8509 13294/8960 521 (-150' lap) 10730/8513 Tubing 4 1/2" 12.6# 13Cr-85 VamTop 8,430 7,500 10730 Surface (-5' into liner TBS) Mud Program Surface Hole Mud Properties: DrillPlex I 12-1/4" Hole Section Density PV YP API FL Chlorides Funnel Depth Interval P139 (cp) lb/100 ft2 m1/30min mg/I pH Viscosity sec/qt 0'-Section TD' 8.8-9.4 - 30-50 40-80 NC <1000 10.8 60-120 Intermediate Mud Properties: LSND I 8-3/4" hole section Depth Interval Density PV YP API FL HTHP FL MBT pH (PPM 3,333' -7,800' MD Casing shoe to Top 9.2-9.5 . 12 - 18 20-28 <6 NC <18 9- 10 Overpressure 7,800'-10,876'MD Top Overpressure to 10.4-10.5 12 -22 20-28 <4 <10 <20 9- 10 Section TD Z-71 PTD Page 4 2/4/2013 Production Mud Pro erties: Water Based Polymer Fluid (PowerPro) I 6-1/8" hole section Low Shear Depth Interval Density (cp) (Ibl OOft2) API FL Rate MBT pH Viscosity 10,876'-TD 8.5 -8.7 • <12 10-20 >10 >15000 <4 8-9.5 Logging Program 12-1/4" Surface: Sample Catchers- not required for surface hole Drilling: Dir/GR/Res Open Hole: None Cased Hole: None 8-3/4 Intermediate: Sample Catchers as required by Geology Drilling: Dir/GR/Res/Neu/Den • Open Hole: None Cased Hole: USIT/CBUGPIT—Contingent upon cement job 6-1/8" Production: Sample Catchers—as required by Geology Drilling: Dir/GR/Res/Azi/Neu/Den • Open Hole: None Cased Hole: . None Cement Program Casing Size 9-5/8"40#, L-80 Surface Casing Lead: Open hole volume+ 350% excess above permafrost. Open hole volume+40%excess Basis: below permafrost. Port collar used if hole conditions dictate Lead TOC: Surface Tail: Open hole volume+40% excess+ 80 ft shoe track Tail TOC: 1000 ft MD above casing shoe Total Cement Lead 520 bbls, 2919.7 cult, 1569 sks of 11.0 ppg DeepCRETE, Yield: 1.86 ft3/sk Volume: Tail 84.2 bbls, 472.7cuft, 404 sks of 15.8 ppg Class G, Yield: 1.17 ft3/sk Casing Size 7"26#, L-80 Intermediate Casing Lead: Open hole volume+ 30% excess _ 6'5-0; 3(-et,' i vO.n D Basis: Lead TOC: 650'TVD above the SB_Na 3.3t' I v U 5/7? M D) Tail: Open hole volume+ 30% excess + 80 ft shoe track Tail TOC: 500 ft MD above casing shoe Total Cement Lead 218.2 bbls, 1223.6 cult, 699.2 sks of 11.5 ppg LiteCRETE, Yield: 1.75 ft3/sk Volume: Tail 20.5 bbls, 115 cuft, 99 sks of 15.8 ppg Class G, Yield: 1.16 ft3/sk Casing Size I 4.5" 12.6#, 13Cr-85 Production Liner Z-71 PTD Page 5 2/4/2013 Basis: I N/A(cementless liner) Surface and Anti-Collision Issues Surface Shut-in Wells: No wells required shut-in to move the rig on/off the Z-71 conductor slot. Hydrogen Sulfide Z-Pad is considered an H2S site. Recent H2S data from the pad is as follows: • Well Name H2S Level Reading Date #1 Closest SHL Well H2S Level Z-113 12 ppm 5/10/2012 #2 Closest SHL Well H2S Level Z-40 26 ppm 11/6/2012 #1 Closest BHL Well H2S Level Z-39 18 ppm _ 4/26/2012 #2 Closest BHL Well H2S Level Z-34 NA-new well #3 Closest BHL Well H2S Level Z-17 10 ppm 2/16/2012 #4 Closest BHL Well H2S Level Z-03A 10 ppm 2/14/2012 Faults Formation Where Encounter MD TVDss Throw Direction Uncertainty Fault Intersect Intersect and Magnitude Fault#1 (Highland State 3,880.0 3,510.0 Southwest,250 ft. +/-150 ft. MD Fault) -UG3 Fault#2-TKB/LCU 8,750.0 6,720.0 North, 10-20 ft. +/-100 ft. MD Fault#3-Not Penetrated N/A N/A North, 20 ft. +/-100 ft. MD Fault#4-Ivishak 45P 12,340.0 8,870.0 North, 10-20 ft. +/-100 ft. MD Fault#5-Ivishak 46P 12,690.0 8,860.0 South, 20-30 ft. +/-100 ft. MD Fault#6-Not Penetrated N/A N/A North,40 ft. +/-100 ft. MD Drilling Waste Disposal • There is no annular injection in this well. ' • Cuttings Handling: Cuttings generated from drilling operations will be hauled to grind and inject at DS-04. Any metal cuttings will be sent to the North Slope Borough. • Fluid Handling: Haul all drilling and completion fluids and other Class II wastes to DS-04 for • injection. Haul Class I waste to DS-04 and/or Pad 3 for disposal/Contact the GPB Environmental Advisors(659-5893)for guidance. Well Control The 12-1/4"" surface hole will be drilled with a diverter. The 8-3/4" and the 6-1/8" hole sections will be drilled with well control equipment consisting of 5,000 psi working pressure pipe rams (2), blind/shear rams, and annular preventer capable of handling the maximum potential surface pressures. Based upon calculations below, BOP equipment will be tested to 3500 psi. BOP test frequency for Z-71 will be 14 days with function test every 7 days. Except in the event of . a significant operational issue that may effect well integrity or pose safety concerns, an extension to the 14 day BOP test period should not be requested. Z-71 PTD Page 6 2/4/2013 Intermediate Interval Maximum anticipated BHP 3585 psi from the TSGR at 8640' TVDss(7.98 ppg EMW) . Maximum surface pressure 2870 psi from the TKC4 at 6670' TVDss (10.20 ppg EMW, 0.10 psi/ft gas gradient to surface) 25 bbls with 12.6 ppg frac gradient Kick tolerance Assumes 0.5 ppg kick intensity over the anticipated 10.2 ppg pore pressure in the Kuparuk with a 10.4 ppg MW(worst case kick zone for interval). Planned BOP test pressure Rams test to 3500 psi/250 psi Annular test to 3500 i/250 psi P 7" Casing Test 3500 psi surface pressure Integrity Test—8-3/4" hole LOT after drilling 20'-50' of new formation below previous shoe 7" Casing The VBRs will be changed to 7" rams to accommodate the 7" casing string. Production Interval Maximum anticipated BHP ; 3585 psi @ TSGR at 8640' TVDss (7.98 ppg EMW) • Maximum surface pressure 2721 psi (.10 psi/ft gas gradient to surface) Infinite with >8.8 ppg frac gradient Kick tolerance Assumes a 0.5 ppg kick intensity over the anticipated 7.98 ppg pore pressure in the Sag River with a 8.5 ppg MW(worst case kick zone for interval). Planned BOP test pressure Rams test to 3500 psi/250 psi Annular test to 3500 psi/250 psi Integrity Test—6-1/8" hole FIT after drilling 20'-50' of new hole, target 12.5 ppg FIT 4-1/2" Liner Top Packer 3500 psi surface pressure Test Planned completion fluids 8.7 ppg Brine/6.8 ppg Diesel/8.6 ppg Mineral Oil based Mud Variance Request To avoid the risk of plugging the flow line with large rocks and wood encountered while drilling surface hole, it is requested to drill without a flow paddle for the first portion of the surface hole. After drilling past the larger rocks and wood sections, the flow paddle will be put back in the flow line (<1000 ft). Procedures/Safeguards with paddle removed: • Fluid levels will be monitored in the pits for both gains and losses while drilling. Alarms will be set to indicate if gain or loss of more than 5 bbls has occurred. • The well will be monitored for flow when the pumps are off at each connection. • Over 50 surface holes have been drilled on Z-pad, providing a high level of confidence in the ability to drill surface hole on the pad without incident. • The planned 8.8-9.4 ppg fluid will provide over balance to formation fluid. Z-71 PTD Page 7 2/4/2013 Z-71 General Operational Summary Proposed Drilling Rig Operations: 1. MIRU Doyon 25. 2. NU diverter spool & riser. Function test the diverter. 3. Take on Drillplex Spud Mud in the pits and stand back enough drill pipe in the derrick to TD the surface interval. 4. MU 12-W drilling assembly with DIR/GR/RES on bent housing motor. Spud and directionally drill surface hole to the base of the permafrost. Gyro data will be needed for the first —500' MD. Perform wiper trip at the base of the permafrost. 5. Drill the remainder of the surface hole to the planned surface hole TD in lower SV1, —40' ND above the UG4. 6. Circulate bottoms up until hole is clean and POH racking back drill pipe. If pumping out of the hole is required, trip back to TD and make final trip out on elevators. Lay down BHA. 7. Run and cement the 9-%", 40#, BTC-Mod, L-80 casing with torque rings, displacing cement with mud. Bump plug and hold pressure for 5 minutes. A TAM Port collar is optional for poor hole conditions. 8. ND diverter spool and NU and test casing/tubing head. NU the BOPE configured from top to bottom with annular preventer, 2-7/8" x 5-1/2" VBR, blind/shear, mud cross, and 2-7/8" x 5-1/2" VBR. Test rams and annular @ 250-psi low/3500-psi high. 9. Pressure test the 9-%"casing to 250 psi low/3500 psi high for 5 minutes low/30 minutes high once 500 psi compressive strength has been achieved. 10. MU 8-3/4" drilling BHA with PDC bit, bent housing motor and DIR/GR/RES/NEU/DEN/PWD and RIH to float collar picking up drill pipe as required to TD the intermediate hole. 11. Drill to within 10' of shoe track and displace well to LSND drilling fluid. 12. Drill new formation to 20' below 9-%"shoe and perform LOT. 13. Drill 8-3/4" intermediate interval to TD in TSGR. 14. At TSGR, CBU until hole is clean (minimum 3x) and condition mud as necessary to run 7" casing. 15. Pump out to top Kingak, POH while rolling pump at 2 BPM to TKNG. Once at TKNG, POH on elevators only(if backreaming to get out of open hole is necessary, trip back to TD and POH on elevators final trip out). • MAD pass Kuparuk and Schrader formations as required for NEU/DEN data. 16. Change upper 2-7/8"x 5-1/2"VBR rams to 7"casing rams and test to 250 psi low/3500 psi high. 17. RU and run 7", 26#, L-80, VAM TOP HC casing to TD. Cement the 7"casing to 650' ND above SB_Na Top. 18. Pressure test the 7"casing to 250 psi low/3,500 psi high for 5 minutes low/30 minutes high when the plug bumps. 19. Immediately following pressure test, confirm that the OA is open by pumping —5 bbls of drilling fluid down to ensure annulus remains open for freeze protection. Continue to pump 1-2 bbls of drilling fluid down the OA every hour until the lead cement reaches 500 psi compressive strength. Z-71 PTD Page 8 2/4/2013 20. Install the 7" casing pack-off through the stack and test to 250 psi low/5000 psi high for 5 minutes. 21. Change upper 7" casing rams to 2-7/8"x 5-1/2"VBR rams and test to 250 psi low/3500 psi high. 22. Freeze-protect the 9-%"x 7" annulus once the lead cement has reached 500 psi compressive strength. 23. MU 6-W drilling BHA with PDC bit, RSS, and DIR/GR/AZI/RES/NEU/DEN. RIH to the landing collar and begin drilling out shoe track. 24. Displace the well to Power-Pro SF fluid prior to fully drilling out shoe track. 25. Drill 20'of new formation and perform FIT. 26. Drill 6-1/8" hole to planned TD per directional plan. Geo steer as required by rig site geologist. 27. Circulate bottom ups and condition the hole as necessary. Backream to the 7" shoe, MAD passing as required. 28. Trip in hole to TD and circulate/condition the hole as necessary until shakers clean up. 29. Displace water based mud with Rheliant mineral oil based mud. 30. POH on elevators. 31. MU and run 4-'/2" 12.6# 13CR Hydril 521 sliding sleeve/swell packer liner to TD. 32. Drop ball to land and close the well isolation valve(WIV) and set liner hanger and liner top packer. Prior to pulling the running tool, perform a pressure test on the liner top packer by testing the 7" casing x drill pipe annulus to 250 psi low/3500psi high for 5 min low/30 min high. 33. Pull liner running tool above liner top. Displace well to clean brine. 34. POH, L/D the liner running tool. 35. R/U and run a 4-%2", 12.6#, 13CR, VAMTOP tubing completion with GLMs and single gauge mandrel. Space out and land the tubing with tubing tail inserted into the liner tieback sleeve. 36. Make up tubing hanger per FMC Rep. Land the tubing hanger, and run in lock down screws. 37. Displace tubing and IA to brine. 38. Reverse circulate filtered brine and corrosion inhibitor into the tubing x casing annulus. 39. Drop ball/rod and set packer and individually test the tubing and annulus to 3,500 psi for 30 minutes. Record each test. 40. Shear the DCK valve. 41. Install TWC and test from above to 250 psi low/3500 psi high for 5 minutes each and from below to 250 psi low/3500 psi high for 5 minutes low/30 minutes high. 42. Nipple down the BOPE. Nipple up the adaptor flange and tree, test to 5,000 psi with diesel. 43. RU DSM lubricator and pressure test. Pull TWC. 44. RU circulating lines. Freeze protect the well to—2000' TVD and allow diesel to U-tube reaching equilibrium. Z-71 PTD Page 9 2/4/2013 45. Install a BPV. 46. Secure the well. Rig down and Move Off. Planned Post-Rip Operations: Slickline : 1. Pull BPV, Pull Ball, Rod and RHC Plug with slickline. 2. Pull shear valve and dummies, install GLVs. 3. Open sliding sleeves as required by NWD PE. Flow back and clean up the well. 4. Close sleeves as needed to attain desired initial arrangement for production. 5. Install flow lines and well house. Z-71 PTD Page 10 2/4/2013 Z-71 Drilling Critical Issues POST THIS NOTICE IN THE DOGHOUSE I. Well Control: A. Surface Hole: Normal pore pressures are expected throughout the surface hole drilling operations B. Intermediate Hole: Normal pore pressure is expected while drilling the Ugnu and Schrader Bluff. Abnormal pore pressure is present at this area on Z-pad starting at the Top of the Colville and extending through the base of the Kingak. Abnormal Pore pressures of 10.0 - 10.2 ppg EMW are expected. C. Production Hole: The pore pressure in the production interval is anticipated to be subnormal due to offset well production. The highest anticipated pore pressure is 7.98 ppg. The Shublik formation is a non-permeable formation and is considered an unlikely risk for flow. However, gas breakout at surface and gas cut mud have been encountered in the Shublik on both Z-69 and Z-34. Neither well required the drilling fluid to be weighted up to kill the well. Any well flow must be shut-in and discussed per RAPID prior to proceeding. II. Hydrates: A. Gas hydrates may likely be present in the SV5 through the SV1 surface hole below the Permafrost base, but may be present deeper. Be alert for hydrates or gas cut mud. Use standard operating procedures for hydrates, if encountered. Ill. Faults/Lost Circulation: A. Z-34 is the offset well for Z-71, Z-34 traversed the same faults as planned for Z-71. During the course of drilling Z-34, temporary seepage losses were encountered in the intermediate hole and minimal losses were experienced crossing faults in the production hole. The Highland State fault crossing risk has been reduced by intersecting the fault in the UG3 away from the shallow gas in the UG4 in the area. Severe lost circulation is not expected from the data obtained by Z-34. In the event of lost circulation follow the lost circulation decision tree. Formation Fault Encountered MD Intersect TVD Est.Throw& Uncertainty Intersect Throw Direction Fault#1 (Highland State Fault) 3,880.0 3,510.0 Southwest, +/_ 150 ft. MD - UG3 250 ft. Fault#2-TKB/LCU 8,750.0 6,720.0 North, 10-20 ft. +/- 100 ft. MD Fault#3- Not Penetrated N/A N/A North, 20 ft. +/- 100 ft. MD Fault#4- Ivishak 45P 12,340.0 8,870.0 North, 10-20 ft. +/- 100 ft. MD Fault#5- Ivishak 46P 12,690.0 8,860.0 Sout ft 20-30 +/- 100 ft. MD Fault#6- Not Penetrated N/A N/A North,40 ft. +/- 100 ft. MD IV. Kick Tolerance/Integrity Testing A. With the planned mud weight, the kick tolerance is 25 bbls with a 12.6 ppg LOT in the intermediate section. The production interval kick tolerance is infinite with an 8.8 ppg FIT. If planned LOT/FIT values are not achieved, do not drill ahead without risk assessment and proper authorization. All kick tolerances are calculated based on a 0.5 ppg kick intensity over likely pore pressure Test Point Test Depth Test type EMW(lb/gal) 9-%"Shoe 20'-50'from the 9-5/8"Shoe LOT 12.6 ppg minimum(25 bbls) 13.9 ppg target(50 bbls) 7"shoe 20'-50'from the 7"shoe FIT 8.8 ppg minimum (infinite) 12.5 ppg target(infinite) Z-71 PTD Page 11 2/4/2013 IV. Hydrogen Sulfide A. As Z-Pad is considered an H2S site, refer to the ADW "Hydrogen Sulfide" SOP for the appropriate operational guidelines. The max recorded H2S readings on the pad was 120 ppm in Z-100 in February 2010. Well Name H2S Level Reading Date #1 Closest SHL Well H2S Level Z-113 12 ppm 5/10/2012 #2 Closest SHL Well H2S Level Z-40 26 ppm 11/6/2012 #1 Closest BHL Well H2S Level Z-39 18 ppm 4/26/2012 #2 Closest BHL Well H2S Level Z-34 NA- new well #3 Closest BHL Well H2S Level Z-17 10 ppm 2/16/2012 #4 Closest BHL Well H2S Level Z-03A 10 ppm 2/14/2012 CONSULT THE Z-PAD DATA SHEET AND THE WELL PLAN FOR ADDITIONAL INFORMATION. Z-71 PTD Page 12 2/4/2013 TREE= 4-1/16" WELLHEAD= FMC Z-71 Proposes : ACTUATOR= Becht KB.ELEV= 96.8'MSL BE REV= 56'MSL I KOP= 203'TVDss Max Angle= 98 @ 11,608' 120"CONDUCTOR H 108' - r TBD H9-5/8°TAM PORT COLLAR Datum MD= 11,060' Datum1VDss= 8800' I I 2000' I—4-1/2"HES X NIP,El=3.813" 9-5/8',40#,L-80, BTC-M,ID=8.835' H 3333' ' GAS LET MANDRELS ST MD ND DEV TYPE VLV LATCH PORT DATE 7 TBD 2900 42 KBG-2 DUM RK 1" Minimum ID = 3.813" 6 TBD 4400 42 KBG-2 DUM RK 1" 4-1/2" X Nipples 5 TBD 5200 39 KBG-2 DCK2 RK 1" 4 TBD 6000 12 KBG-2 DUM RK 1" 3 TBD 6800 12 KBG-2 DUM RK 1" 2 TBD 7600 16 KBG-2 DUM RK 1" 1 TBD 8400 2 KBG-2 DUM RK 1" I ■ 10,535' 1/2"IBS X NE,ID=3.813" 4-1/2"NDPG-C SINGLE GAUGE MANDREL H 10,572' ® I>< 10,608' H 7"X 4-1/2"I-ES TNT PKR • 11-11 10,642' I-14-1/2'HES X NIP,ID=3.813' • •IL 10,715' H4-1/2°HES X NIP,ID=3.813" 10,726' 4-1/2"TBG,12.6#,13-Cr,VT, ID=3.958" — 10,730' ( b —7"X 5"BKR ZXP PKR&Flexlock HGR w/TEBACK SLV 10,730' WLEG 7"CSG,264,L-80,VT HC,.0383 bpf,D=6.276" H 10,876' HES SWB-L PACKER ASSEMBLY NO SEE TOP DEPTH MN ID I l H D"ES"X SLD SLV,ID=3.813" 13 4-1/2" 3.958" SIZE NO# TOP DEPTH 0/C DATE 12 4-1/2" 3.958" 4-1/2" 10 C 11 4-1/2" 3.958" 1 a 4-1/2" 9 C 10 4-1/2" 3.958" 4-1/2" 8 C 9 4-1/2" 3.958" I I I 4-1/2" 7 C 8 4-1/2" 3-958" 4-1/2" 6 C 7 4-1/2" 3-958" 1 1 4-1/2" 5 C 6 4-1/2" 3-958" MC 4-1/2" 4 C 5 4-1/2" 3.958" 4-1/2" 3 C I I 4 4-1/2" 3.958 IS 4-1/2" 2 C 3 4-1/2" 3.958" ® 4-1/2" 1 C 2 4-1/2" 3.958" ® O=OPBJ C=CLOSED 1 3-1/2" 2.992" 4-1/2" LNR, 12.6#, 13CR 85 Hydril 521, ID=3.958 121 ' ' 13,200' J�XO4-112'Hydri521 x 4-1/2•VTI 1 I 13,2101HBKR Locator Sub ID=3.91"VT I 4-1/2"Baker VVIV VAMTOP —1 13,215' 3-1/2"ITS OBM Anchor Swelipacker VT 13,217' —IXO 4-1/2"VT x 3-1/2"VT I XO 3-1/2"VTx 4-1/2"IBT pin — 13,262' 0 ���� 13,272' —14-1/2"Float Collar BT I Production Liner TD — 13,294' —I 13,293' —14-1/2"Float Shoe BT I DATE REV BY COMMENTS DATE REV BY COMMENTS 12/20/12 TTH Z-71 Proposed Completion SEC 19, CI 0 _ p o d C y V O hm.- 00000 V 7 . r.-0,01- 0. cMOmN W N0.-^ ,-2ulmN C b K cnDO,K,COO mm mOOO M Ni O mN 0.4.V 0r W W40ppm)(^ o.-om`3: R N N N Np N N 822122 N NNN M 28888 m .-. 88888.. ...... 00 00 00 00 00 000000 0 0 0 0 0 0 0 0 00 00 8 8 8 00000 d 12 mmmmm 00000 O O O O O 00000 0 O m O O 0)0)0)0)0 m a M 0 n 0 0 M p 0 0 43 V n 0.-.-43 0 m m.- . .r m N O O O N y Mm V M O W W o M< n av'O 0000m ).f)0,00 t O Oi Oj pjmO 0•-686 OisiN mc0 4cci cV m V • .4K f�4Kg 0- M M c7 M M N(� O�n O N o er M m m O N cO I�(7 0) M M00.-0 NNNNN NNN 0) .-0000 m m m O O V c M 00)0)m m 0)00)0)0) 0)0 m m m 00000 m m m m m 00)0)0)0 Z 0 0 1 4 3 0 0 00000 0)0000 00000 O O O O O 00000 030o00 00000 m m m m m m m m m m m m m 03 O ! 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Z-71(P7b) 5'W Date:January 07.2013 0 800 1600 2400 3200 4000 0 ....RT Cry 1.75/100 i 1 i b i 0 KOP B d 1/100 - cr.,2.251100 Crv1.75/100 End Cry End Cry 'N 4. 95/6"Csg '"' S' -800 d ' \` .... -800 Z-71 Flt 1 34406 ill- / Cry 41100 Z-71 Tg1 UG4 , Fault 81 End Cry - Cry 3/100 -1600 l:iid•6ry -1600 Cry 31100 End Cry Cry 41100 -2400 •• -2400 A A A Z End Cry Fault 2 CD p Z-71 Flt 2 673066 CO -3200 O < -3200 II N Z-71 Flt 3lvish. LO U U) (/) Z-71 Tgt 1 Sa V 7"Cs, V V Cry 10.31100 • '% -4000 -4000 Z-71 Geo Poly iti .71(P5)DT 95% cm 10.3/100 End Cry 1' -4800 -4800 Fault 4 tt.• I_ Cry 6/100 iq Z-71 Tgt 3 rev IN Z-71 Flt 5 Ivishak . -5600 3 4 Faults II -5600 End Cry III Z-71 Flt 5lvishak 4-112"Lnr Z-71(P7b) Z-71 FO 6 Ivish -6400 o i TD -6400 0 800 1600 2400 3200 4000 «< W Scale=1:800(ft) E >>> Project' Prudhoe Bay Site: PB Z Pad N Well: Plan Ivi Z-71 (NP) v6 ,- ,od `j,.., ,,,,Or.• Plan S1h Z-201(NM)v6/Plan#6 Z-•111 v6 A/a �i Plan Sch Wellbore: Plan Z-71 a. i ,s� �s �, 0 z •1::Design: Plan #7b Z-71 v6 ,� � � ;'o� ' h 04 o N 4a� w . "fie 800 ' / �`7 ��. �' "" o,.) r �°•,t r; J VF If �� d� 0 (t) N ' -.ASS 400 49 iy�Q`3' 6j �6— 7`, i, ,�p o 'a• iv. n c l r` t ° y N co cP 0 pry �! m p o w /' ` t$' ' SP *0:2 -400 u $,�'� r, �' N iiirN',,',V,,.;.* . 4404,:, - .„ q, 5,_ cF -800 1- i \ a M,�o .:. my _ 4, °_ r �.:. A C„ �� N `SOS / e rQ 48 Z�0 ...t...,•,,,;‘,_ S / v. N '200 .1• Q - - , o� 5oiti 0�e ti d _, , 52 1 61- o ry ti S. V� < 54 ' P t a �� c 56 1 IT 1600 .- i8 O p ,E o" eg'' O$ 6.2 58 6 so`l' ibs 60 cQ 4:1; -2000 a o 6 4 66 .z. a Boos'- !(P-5{.=,'PAD BOOSTER NOCt9 6 88 ,6 F6 �3 tot)v6/P(an at _ r,� - 6 k• 0 ►!:: • �0 ^� 0 o 64 �% 5 80 66 60 82 :2 68 -3200 77 TA 70 r 72 �'' � � k.' a6 :8 -3800 Z-12a/2r ■ 66 a dr-4000 6� Ali. ..1 AZ 60 2 ( _{I I 6 44 62 I! : -4400 46` 4'■ a 6. 6 l 6• 60 66 66 -4800 6; 52 66 66 71 40 54 \ 10 e 6) i 6 o , -5200 72 5 1.V 74 42 56 60 12 \Q\a4 62 00 76 62 14 V 64 _ _._._ __- -5600 2.40/Z-40 64 78 44 66 66 ^o0 80 66 i 7 6 r� 5'. - 68 -6000 co 82 46 $ 10 Y 4112" �00 88: �� 1'� ZB Plan Ivf Z I/(NP)v6/Plan#7b 2-71 v6 -6400 i i i 1 r I . . . I . . L61 1 P i 1 ' ' I , r., 44 r4/1165141 I r 1 I Z-/8R-1 ' ' ' I ' ' ' ' I -800 -400 0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 West(-)/East(+) (800 Win) N Project: Prudhoe Bay .. N Site: PB Z Pad ^' Well: Plan Ivi Z-71 (NP)v6 A, ,- Plan Sch ., (NM , .a .. -1 Wellbore: Plan Z-71 7? °'as��/ �, m Z-201 v6 ■ Design: Plan#7b Z-71 v6 fi �t2., 1 m, 4 O/ N 0 _ a tiff _ N p y; 7 li S' �� 100 f 42- et, 4� +r..1, ;',,r.- ''7 ,9 1 14 1A N N• re 15 ` 1 15 • cp -200 1 1 �. . `�• R 8 10 16 1fy ac � ..t5'‘,AS N 11 1 16 4 �°� N 16 �9 12 14 17 17 a ■ r.�■ .. 13 i7 1: `3 Ilkit r 14 1$ 19 19 w0 t ". N6 20 1g �� 400 .. ��. 1'r 20 21 _.__ 20 �� w dk t 21 22 21 'L,ti c, 1 25 A,:-7.. '7. 22 23 �� P6 ^'^ 23 24 22 ya 25 h 1. 27 ,4 26 23 , rs N.,: '1.4 600 8 1 o- :7 A 1 .+n7 1 , 4 ry .28 a tr ,0 y F ti ; 25 4. , b h O s•27 a °16 o " 8 -700 16 2 3�S 31 0�h Iiiiihib..„/A,° 5 NO CAI 21 a° 33 ° y\ 34 ^800 - 35 �' ' 1100 Ca 2� {__- �' bt3 72� 9 I- ,„ ,^ CDC) $5 h f 2 0S°-7300 4 3 5� 1-0 45 1g 6 46 h`ti 9 -1400 47 03 4111111*48 � 5A $1 F _1x500 49 2� 5 - 50 5 ,j0 151 y0 't, 6^ _1600 52 2 53 S i 1 c 54 21 56 `P 1700 m Q 55_NT p 6c6-1 N/' g 60 4 Aa 31 1 -1800 i i i i i i i ' 8ff116 ii , , r I i r r r I r r r i r IZ,17/ -17 1 r r ( r I r 1 r r I r i y Z 5 L' x 1 1 -400 -300 -200 10 0 100 200 300 400 500 600 700 800 5 90 ) v6/Pihmo1 West(-)/East(+) (200 ft/in) Project: Prudhoe Bay Site: PB Z Pad Well: Plan Ivi Z-71 (NP)v6 9 o - Plan Sch Z-201(NM)v6/Plan 1 Wellbore: Plan Z-71 Design: Plan#7b Z-71 v6 ,, d's4c/ �� 'd' 1 r1l.1 10 r1� �Oj "� 100- 45- 41 4 4) m - '° l3z 'r'° 'a dr -, rig 18' -.% 9 nN 8 7 7 ic 25- — 6 ■ 1S <L� K 6 9 -S 1 N m �C -25- N _ g ...-a 1 N -50- — ��— N0 . w ! S IIIIIIIIIIIIII“.11 .11lPilli""'' 10 ' _ N w i. 5 A e _ 11 ti- N to 0 -100- 1Z I L Z t-125 ' 10 l 1 3 C 1 * % 6 11 A. cn 4 1 • D -150- 12 _ lil - 5 14 _ t e 1 13 -175— .. _. ._... } .. _ j 9; 15 '‘b 10 11 15 I' -225- 16 1-.._._ '1 - 12 � 4 -250- 13 18 141 I 17 \N14IllIllIlliIllIllIllk 4.1' -275- ---t 17 1 T _ 15 ST Nib 16- --i N. _ 18 18 R\c* 17 ` 8 ^� ' F -325- \yQ _ 18 19csv NIP 19 e -350 r I 16,84YZi34 I I I N I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I nazi 1W r-#1'(IsjPj yk/pI ln' -1 -150 -125 -100 -75 -50 '7445 0 25 50 75 100 125 150 175 +.71 e?(4,, West(-)/East(+) (50 ft/in) '�1...r.-c 6 Play Plan#7b Z-71 v6(Plan Ivi Z-71(NP)v6/Plan Z-71) , .......-- ',„ : //' fr o I^ f 300 00 O r - / ,.\ f 30 00 i , ..- ,,,,, `... i 00 0 5000 '1 ' .,,.1, ,, : .---" :Ills,.„,,N,,, 111:'N, . ,o �. 600 X000 ,` 8 000 ��'� ':11 ' [ „ �' >cT ` ..„,:„.„„., i . 1000 / Ns,` N, 0 O °o\ % XO 0 00 / �: S000?02 0 O 0 �� O'v, 0 00 \ 00 � . ,00 00 Oilfield Services, Alaska Schlumberger Drilling& Measurements Schlumberger 2525 Gambell, Suite 400 Anchorage, AK 99503 Tel (907) 273-1700 Fax (907) 561-8367 Thursday,January 31, 2013 Josh Mallery PBU WOA Z-71 (P7b) BP Exploration (Alaska) Inc. Doyon 25 Close Approach Analysis We have examined the potential intersections of the subject well with all other potentially conflicting wells, according to the BPA Directional Survey handbook (BPA-D-004) dated 09/99. Method of analysis: 1. A list of wells to be analyzed is created in Compass by performing a global scan with an initial search radius of two hundred feet with an increment of one hundred feet for every one thousand feet of measured depth in the subject well. 2. Wells are analyzed using the Compass Anti-collision module (BP Company setup) with major risk safety factors applied. 3. All depths are relative to the planned well profile. Survey Program: Survey Tool Program Date 1/712013 From To (ft) (ft) Survey(Wsllbore) Tool flame Description 40 80 500,00 Plan#7b Z-71 v6(Plan Z-71) GYD-GC-SS Gyrodata gyro single shots 500.00 2,000.00 Plan#7b Z-71 v6(Plan Z-71) MWD MWD-Standard 500.00 3,330.00 Plan#7b 2-71 vS(Plan 2-71) MWD+IFR+MS MWD+IFR+Multi Station 3,330.00 4,830.00 Plan#7b Z-71 v6(Plan Z-71) MWD MWD-Standard 3,330.00 10.875.00 Plan#7b Z-71 v6(Plan 2.71) MWD+IFR+MS MWD+IFR+Multi Station 10,875.00 14375.00 Plan#7b 2-71 v5(Plan 2-71) MWD MWD-Standard 10,875.00 13,294.10 Plan#7b Z-71 v6(Plan Z-71) MWD+IFR+MS MWD+IFR+Multi Station Survey Interval Surface hole: 1 per stand - 93 ft* Intermediate hole 1 per stand - 93 ft* Production hole: 1 per stand - 93 ft* * (except where planned or as-drilled doglegs are 5°/1 00' DLS or more;then survey every-30 ft across the interval) * Close Approach Analysis results: Under method (2), note: All wells pass Major risk All data documenting these procedures is available for inspection at the Drilling & Measurements Drilling Engineering Center(DEC). Close Approach Drilling Aids to be provided: A drilling map and traveling cylinder plot will be provided. Checked by: Scott DeLapp 01/31/2013 Ej "---...., t ,/jN C1 .,Viiii -N- GRID „ C,-) �► 9 ■ ■ ■ -,SPINE RD d 6 • ill 32 1' " :,t° , 7 ■ ■ 31 K . ' pp W PAD' 6 • 30 1.,, V" / 112 Z-PAD I • �I 108 •I Poi 28 r •�� r • 1021 t , 3 • 10761 71-118 PROJECT 2 • 1 'q '' 1 1141 t 1031 i1 1 ■ SPARE-A ® P-504A ®® • P-5048 c--\A —3/ VICINITY MAP ® N TS *21 • 22 39 ■ 11 • 523 12 • • 24 13 • • 25 • 26 14 ��0N>1q� 15 M • SLOT 1 ����� 0 F q q�°is 16 ■ • 2-100 .4!4r. 1,;...°P� °°......`4S,��I 17 • • 101 r.1,; °°°r9i SURVEYOR'S CERTIFICATE • 18 ■ i *°°•49 °,,* I HEREBY CERTIFY THAT 1 AM 46 + do REGISTERED AND LICENSED M 19 • Z—PAD Or TO PRACTICE LAND SURVEYING IN ✓ rr ♦ THE STATE OF ALASKA AND THAT 20 ■ r r THIS AS-BUILT REPRESENTS A SURVEY - / • ° do MADE BY ME OR UNDER MY DIRECT I 50 511 Tic Richard F. Allison �� DIAMENSIIONS"AND OTHER OE-AILS ARE 88 202 �J'J,°•• �0608 ° CORRECT AS OF JULY 02, 2011. I SD 57 5 i 15 ,off/�� ESS ICON* �; `• 2151 113 ii1111/1t‘‘\ 40 I 961 d- 2131 [41u _ LEGEND 341 105 221 • AS-BUILT CONDUCTOR 203 42 • EXISTING WELL CONDUCTOR NOTES: 1. ALASKA STATE PLANE COORDINATES ARE ZONE 4, NAB 27. 2. HORIZONTAL CONTROL IS BASED ON Z PAD CONTROL MONUMENTS MON 2 AND MON 3. 3. VERTICAL CONTROL IS BASED ON Z PAD MONUMENTATION. 4. ELEVATIONS ARE BPX MEAN SEA LEVEL (M.S.L.) DATUM. 5. GEODETIC DATUM IS NAD27. 6. PAD AVERAGE SCALE FACTOR IS 0.999911213. 7. DATES OF SURVEY: JUNE 28-30, JULY 1-2, 2011. 8. REFERENCE FIELD BOOKS: NS11-44 PGS. 1--75: NS11-46 PGS. 1-9. i 4,s I • 34i, 40, 42, 50, 511, 55, 57, 61, 62, 65, 66, 68, 69, 70, 105, 113, 115, 201, 202, 203, 2111, 2121, 2131, 2141, 2151, 2161, 2171, 2181, SO, SG, SL, NK DRANK: F. Robert 8ARNHA2T ,y�(-J� CHECKED: bp pI,��, DATE:7/1Z1 .. l-y,!f DRAWING: L SNEE is ---- IS SIC. FR011 WOZ 21 WOA Z—PAD JOB e 11�1S®b. ENO: WRD PAD EXPANSION RI 7/1/11ISSUE0 FOR INFORMATION WFB Al ��m"""° ,- a 2BS. AS—BUILT WELL CONDUCTORS 1 a 3 Na DATE REVISION BY CHH N.J.S 4.00 MW LOCATED WITHIN PROTRACTED SEC. 19, T. 11 N., R. 12 E., UMIAT MERIDIAN, ALASKA WELL A.S.P. PLANT GEODETIC GEODETIC CELLAR SECTION NO. COORDINATES COORDINATES POSITION(DMS) POSITION(D.DD) BOX ELEV. OFFSETS Y= 5,959,100.13 N= 1,179.09 70'17'51.597" 70.2976658' 4,292' FSL 34i X= 600,125.84 E= 1,870.12 149'11'20.998" 149.1891661' 56.1' 2,552' EEL 5 L Y= 5,959,100,17 N= 1324.00 70'17'51.616" 70.2976711' 4,294' FSL 40 X= 599,980.94 E= 1870.16 149'11'25.221" 149.1903392' 56.0' 2,697' FEL Y=5,959,239.95 N= 1,126.45 70'17'52.965" 70.2980458' 4,431' FSL /�/ i� 42 X= 600,178.47 E= 2,009.96 149'11'19.409" 149.1887247' 560' 2,497' FEL 5-A 50 Y= 5,959,100.19 N= 1,473.93 70'17'51.636" 70.2976767' 4,296' FSL X= 599,831.02 E= 1,870.18 149'11'29.591" 149.1915531' 56'2 2,847' FEL N.4 511 Y=5,959,240.04 N= 1,466.46 70'17'53.011" 70.2980586' 55 9, 4,435' FSL X= 599,838.49 E= 2,010.05 149'11'29.319" 149.1914775' 2,837' FEL s' Y= 5,959,100.12 N= 1,458.95 70'17'51.634" 70.2976761' 4,295' FSL 55 X= 599,846.00 E= 1,870.11 149'11'29.155" 149.1914319' 56.1' 2,832' FEL ND 57 Y=5,959,240.04 N= 1,421.49 70'17'53.005` 70.2980569' 4,435' FSL X= 599,883.46 E= 2,010.05 149'11'28.009" 149.1911136' 55'9' 2,792' FEL Y=5,959,239.97 N= 1,376.44 70'17'52.998" 70.2980550' 4,434' FSL /�F 61 X= 599,928.50 E= 2,009.98 149'11'26.695" 149.1907486' 55.9' 2,747' FEL �,11 Y=5,959,239.94 N= 1,436.45 70'17'53.006" 70.2980572' 4,435' FSL �r 62 X= 599,868.50 E= 2,009.95 149'11'28.445" 149.1912347' 56'0 2,807' FEL ,5p 65 Y= 5,959,100.15 N= 1,398.94 70'17'51.626" 70.2976739' 56 1` 4,295' FSL X= 599,906.01 E= 1,870.14 149'11'27.405" 149.1909458' 2,772' FEL Y= 5,959,100.11 N= 1,443.99 70'17'51.632" 70.2976756' 4,295' FSL SC 66 X= 599,860.96 E= 1,870.11 149'11'28.719" 149.1913108' 56'2 2,817' FEL 5Y=5,959,100.23 N= 1,134.00 70'17'51.592" 70.2976644' 559' 4,291' FSL 1� 68 X= 600,170.92 E= 1,870.22 149'11'19.683" 149.1888008' . 2,507' FEL Y=5,959,239.94 N= 1,301.49 70'17'52.988" 70.2980522' 4,433' FSL /4 T 69 X= 600,003.45 E= 2,009.95 149'11'24.511" 149.1901419' 56'1' 2,672' FEL 5F 70 Y= 5,959,100.10 N= 1,384.02 70'17'51.624" 70.2976733' 56 2' 4,294' FSL X= 599,920.93 E= 1,870.09 149'11'26.971" 149.1908253' 2,757' FEL Y=5,959,100.05 N.= 1,163.88 70'17'51.594" 70.2976650' 559, 4,291' FSL 57\) 105 X= 600,141.04 E= 1,870.04 149'11'20.554" 149.1890428' ' 2.537' FEL i c 1 Y=5,959,239.90 N= 1,346.45 70'17'52.994" 70.2980539' 4,434' FSL 1 f7 113 X= 599,958.49 E= 2,009.91 149'11'25.821" 149.1905058' 56'0' 2,717' FEL ,�r N= 1,361.384 70'17'52.997" 70.2980547' 4,434' FSL !v 115 )(Y=._5,955999,,294403..0536 E= 2,010.04 149'11'26.256" 149.1906267' 55'9 2,732' FEL NOTES: 1. ALASKA STATE PLANE COORDINATES ARE NAD27, ZONE 4. 2. HORIZONTAL CONTROL IS BASED ON Z PAO CONTROL MONUMENTS MON 2 ANO MON 3. 3. VERTICAL CONTROL IS BASED ON Z PAD MONUMENTATION. 4. ELEVATIONS ARE BPX MEAN SEA LEVEL (M.S.L.) DATUM. 5. PAO AVERAGE SCALE FACTOR IS 0.999911213. AS—BUILT WEI L CONDUCTORS' 34i, 40, 42, 50, 511, 55, 57, 61, 62, 65, 66, 68, 69, 70, 185, 113, 115, 201, 202, 203, 2111, 2121, 2131. 2141, 215i, 2161. 2171, 2181, SD, SG, SL, NK F'. Robert °R"N' , BARNHART ': '' GHECJtm p P JAC065 N 1 OATE:7,, :::J! DRAygNC: SHEET: :.r FRB15 NO2 21 WOA Z PAD li apppc• JDB No: WRD PAD EXPANSION SCALE- 2 a 3 se 7/1/11 ISSUED fOR INFORMATION 1FB JJ ��Nw w ax,on I. _ 2gir AS—BUILT WELL CONDUCTORS Q. DATE REVISION BY CNK maul(.NAMN RS LOCATED WITHIN PROTRACTED SEC. 19, T. 11 N., R. 12 E., UMIAT MERIDIAN, ALASKA WELL A.S.P. PLANT GEODETIC GEODETIC GRAVEL SECTION • NO. COORDINATES COORDINATES POSITION(DMS) POSITION(D.DD) PAD ELEV. OFFSETS ,,f Y=5,959,240.18 N= 1,171.46 70'17'52.973" 70.2980481' 4,432' FSL /t[/ 201 X= 600,133.47 E= 2,010.19 149'11'20.721" 149.1890892' 56.6' 2,542' FEL /v Y=5,959,239.94 N= 1,451.46 7017'53.008" 70.2980578' 4,435' FSL 202 X= 599,853.49 E= 2,009.95 149'11'28.882" 149.1913561' 55'9 2,822' FEL Y=5,959,100.03 N- 1,148.96 70'17'51.592" 70.2976644' 4,291' FSL S(, 203 X= 600,155.96 E= 1,870.02 149'11'20.119" 149.1889219' 56.0' 2,522' FEL Y=5,959,100.23 N= 1,308.95 70'17'51.615" 70.2976708' 4,293' FSL S 2111 X= 599,995.99 E= 1,870.22 149'11'24.783" 149.1902175' 55.9' 2,682' FEL 0 2121 Y= 5,959,240.11 N= 1,141.47 7017'52.969" 70.2980469' 56,4• 4,431' FSL X= 600,163.45 E= 2,010.12 149'11'19.847" 149.1888464' 2,512' FEL /\1 I- 2131 Y=5,959,240.04 N= 1,271.44 70'17'52.985" 70.2980514' 561' 4,433' FSL X= 600,033.50 E= 2,010.05 149'11'23.635" 149.1898986' 2,642' FEL Y=5,959,100.25 N= 1,293.88 70'17'51.613" 70.2976703' 4,293' FSL K 2141 X= 600,011.06 E= 1,870.24 149'11'24.343" 149.1900953' 56'21 2,667' FEL 6/4 Y=5,959,100.14 N= 1,354.05 70'17'51.620" 70.2976722' 4,294' FSL 6/4 2151 X= 599,950.89 E= 1,870.13 149'11'26.097" 149.1905825' 56.2' 2,727' FEL 2161 Y=5,959,240.09 N= 1,316.42 70'17'52.992" 70.2980533' 560' 4,433' FSL X= . 599,988.52 E= 2,010.10 149'11'24.946" 149.1902628' 2,687' FEL /v�r 2171 Y=5,959,239.98 N= 1,156.36 70'17'52.970" 70.2980472' 56.2' 4,431' FSL X= 600,148.56 E= 2,009.99 149'11'20.281" 149.1889669' 2,527' FEL Air 2181 Y=5,959,239.98 N= 1,391.46 70'17'53.000" 70.2980556' 55 9. 4,434' FSL X= 599,913.48 E= 2,009.99 14911'27.133" 149.1908703' 2,762' FEL Y= 5,959,100.11 N= 1,429.03 70'17'51.630" 70.2976750' 4,295' FSL SD X= 599,875.92 E= 1,870.10 149'11'28.283" 149.1911897' 56'41 2,802' FEL Y=5,959,100.09 N= 1,369.02 70'17'51.621" 70.2976725' 4,294' FSL SG X= 599,935.92 E= 1,870.08 149'11'26.533" 149.1907036' 56.2` 2,742' FEL Y= 5,959,100.01 N= 1,279.00 7017'51.609" 70.2976692' 4,293' FSL SL X= 600,025.94 E- 1,870.00 149'11'23.910" 149.1899750' 56'31 2,652' FEL Y=5,959,239.85 N= 1,286.54 70'17'52.985" 70.2980514' 4,433' FSL NK X= 600,018.40 E= 2,009.86 149'11'24.075" 149.1900208' 56'01 2,657' FEL NOT:S; 1. ALASKA STATE PLANE COORDINATES ARE NAD27, ZONE 4. 2. HORIZONTAL CONTROL IS BASED ON Z PAD CONTROL MONUMENTS MON 2 AND MON .3. 3. VERTICAL CONTROL IS BASED ON Z PAD MONUMENTATION. 4. ELEVATIONS ARE 8PX MEAN SEA LEVEL (M.S.L.) DATUM. 5. PAO AVERAGE SCALE FACTOR IS 0.999911213. 6. ALPHA NAME DESIGNATIONS REFER TO BPX DRILLING SURFACE SLOT NAME AS-BUILT WELL CONDUCTORS: 341, 40, 42, 50, 51i, 55, 57, 61, 62, 65, 66, 68, 69, 70, 105, 113, 115, 201, 202, 203, 211i, 2121, 213i, 2141, 2151, 2161, 2171, 218i, SD, SG, SL, NK CRAxN: F. Robert i BARNHART CHECKED:JACOBS bp tic�" D" ATE- I 7,1,11 • DRAWING SHEET; FR811 WO 21 WOA Z-PAD assoe. s Etr WRO PAD EXPANSION me 7/1/11 ISSUED FOR INFORMATION 1FI ,w ' ;' " ,• „ 200' WELL CONDUCTORS 3 a 3 VMS ND. DATE REVISION 8Y ONE MOM-0k ANIKT Ms. -- N - o —IC) - I[) —N 0 0 —- N - 0 —O 0 —h 0 0 C) c - 0 - _c 0 0 n 0 " t/Y - m m 2 — Co _ U) —N E —E U) —h P) Co 7 0 Z —8 m r NCO a) mNn In 0 a >N -0 N C C C 2m m m m CL.CL 0-CI,fL _0 - X i 1 1 1 1 1 1 1 1 1 I I I i t t i [ ' i i t 1 t 1 I 1 1 1 I I I 1 1 1 I I 1 1 t t 1 t I ( i f 1 1 1 7 t i l I I - 0 0 Y') 0 I[) 0 U) 0 11) 0 U) 0 In 0 If) 0(IAA pi.) uoileJedag allue of ailue Anticollision Report Company: North America-ALASKA-BP Local Co-ordinate Reference: Well Plan Ivi Z-71 (NP)v6 Project: Prudhoe Bay ND Reference: Z-71 plan D-25 @ 96.80ft(Doyon 25) Reference Site: PB Z Pad MD Reference: Z-71 plan D-25 @ 96.80ft(Doyon 25) Site Error: 0.00ft North Reference: True Reference Well: Plan Ivi Z-71 (NP)v6 Survey Calculation Method: Minimum Curvature Well Error: 0.00ft Output errors are at 1.00 sigma Reference Wellbore Plan Z-71 Database: EDM.16-ANC Prod-WH24P Reference Design: Plan#7b Z-71 v6 Offset ND Reference: Offset Datum Reference Plan#7b Z 71 v6 6k, . , .,..:4, w ., :E 1 .. . ... x .,+ Filter type: GLOBAL FILTER APPLIED:All wellpaths within 200'+100/1000 of refer Interpolation Method: MD Interval 5.00ft Error Model: ISCWSA Depth Range: Unlimited Scan Method: Tray.Cylinder North Results Limited by: Maximum center-center distance of 1,525.33ft Error Surface: Elliptical Conic Survey Tool Program Date 1/7/2013 From To (ft) (ft) Survey(Wellbore) Tool Name Description 40.80 500.00 Plan#7b Z-71 v6(Plan Z-71) GYD-GC-SS Gyrodata gyro single shots 500.00 2,000.00 Plan#7b Z-71 v6(Plan Z-71) MWD MWD-Standard 500.00 3,330.00 Plan#7b Z-71 v6(Plan Z-71) MWD+IFR+MS MWD+ IFR+Multi Station 3,330.00 4,830.00 Plan#7b Z-71 v6(Plan Z-71) MWD MWD-Standard 3,330.00 10,875.00 Plan#7b Z-71 v6(Plan Z-71) MWD+IFR+MS MWD+IFR+Multi Station 10,875.00 12,375.00 Plan#7b Z-71 v6(Plan Z-71) MWD MWD-Standard 10,875.00 13,294.10 Plan#7b Z-71 v6(Plan Z-71) MWD+IFR+MS MWD+ IFR+Multi Station 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 Z Pad Plan Ivi Z-42(NK)v6-Plan Z-42-Plan#7 Z-42 1,513.65 1,540.00 138.97 30.78 108.82 Pass-Major Risk Plan lvi Z-68(SP)v6-Plan Z-68-Plan#10 Z-68 N 1,278.60 1,270.00 57.68 22.52 35.57 Pass-Major Risk Plan Kup Z-105(SN)v6-Plan Z-105-Plan#4 Z-1 1,833.31 1,795.00 71.46 42.31 36.12 Pass-Major Risk Plan Kup Z-105(SN)v6-Plan Z-105PB1 -Plan# 1,833.31 1,795.00 71.46 42.19 36.25 Pass-Major Risk Plan Sch Z-201 (NM)v6-Plan Z-201-Plan#6 Z-: 463.56 450.00 46.09 8.42 37.67 Pass-Major Risk Plan Sch Z-202(NB)v6-Plan Z-202-Plan#2 Z-2 5,733.86 10,495.00 237.98 163.47 75.17 Pass-Major Risk Plan Sch Z-203(SO)v6-Plan Z-203-Plan#3 Z 520.78 500.00 142.56 9.57 132.99 Pass-Major Risk Plan Sch Z-211 (SJ)v6-Plan Z-211-Plan#5 Z-2 1,300.00 1,310.00 202.91 23.74 180.18 Pass-Major Risk Plan Sch Z-212(NO)v6-Plan Z-212-Plan#3 Z-2 463.88 450.00 15.37 8.43 6.96 Pass-Major Risk Plan Sch Z-213(NL)v6-Plan Z-213-Plan#3 Z-2 674.22 670.00 142.00 11.70 130.39 Pass-Major Risk Plan Sch Z-214(SK)v6-Plan Z-214-Plan#2 Z-2 1,231.73 1,250.00 83.34 22.31 62.69 Pass-Major Risk Plan Sch Z-215(SH)v6-Plan Z-215-Plan#2 Z-2 1,232.06 1,265.00 168.51 22.38 147.30 Pass-Major Risk Plan Sch Z-216(NI)v6-Plan Z-216-Plan#2 Z-2 680.97 680.00 187.39 11.82 175.69 Pass-Major Risk Plan Sch Z-217(NN)v6-Plan Z-217-Plan#3 Z-< 433.76 420.00 30.52 7.91 22.62 Pass-Major Risk Z-113-Z-113 Z-113-Z-113-Z-113 414.48 410.00 221.02 6.91 214.11 Pass-Major Risk Z-113-Z-113PB1 -Z-113PB1 414.48 410.00 221.02 7.07 213.95 Pass-Major Risk Z-115-Z-115-Z-115 196.86 190.00 234.86 3.34 231.52 Pass-Major Risk Z-17-Z-17-Z-17 3,619.12 3,850.00 312.98 96.07 216.87 Pass-Major Risk Z-18-Z-18-Z-18 2,520.06 2,590.00 276.04 64.44 213.15 Pass-Major Risk Z-34-Z-34-Z-34 206.15 205.00 149.69 3.61 146.08 Pass-Major Risk Z-40-Z-40-Z-40 292.39 285.00 242.68 5.15 237.53 Pass-Major Risk Z-46-Z-46A-Z-46A 471.90 460.00 464.66 8.03 456.66 Pass-Major Risk Z-61-Z-61-Plan#12d Z-61 Approved 475.79 480.00 251.37 8.97 242.41 Pass-Major Risk Z-61-Z-61-Z-61 412.90 415.00 247.67 7.03 240.65 Pass-Major Risk Z-69-Z-69-Z-69 40.80 40.70 174.99 0.91 174.07 Pass-Major Risk Z-69-Z-69-Z-69 624.40 630.00 176.00 10.17 165.83 Pass-Major Risk 1/15/2013 3:43:17PM Page 2 of 3 COMPASS 2003.16 Build 73 Project: Prudhoe Bay Site: PB Z Pad Well: Plan lvi Z-71 (NP)v6 Wellbore: Plan Z-71 Design: Plan#7b Z-71 v6 ti From Colour To MD From Surface to 3400'md (9-5/8") ti ,,ti ry ,\P Scan interal 25 ft ,ki' a m ry 41 500 Scale 1 inch 50 ft — All wells pass major risk 40 1 �Q ,e\ S 500 1000 _ ti , _?' $5' `P 1000 1500 2 '.F 1500 2000 \,c o ti Q ti ti tip 2000 3000 ��S° c4 \�c' 0 \�� 3000 5000 " Q 180 �- ,t, 5000 10000 r 98 975 1023 �� Q� 10000 15000 v 50 co Q' y '� 77 1002 30 N mom/ r 953 1484 ,.S, t2. r...-i. D ,a / 345 - 1 . y 50------.9-1V `464 / 0 959.444 h, O') 27,4 1324 121 91 9424 1%v 929 ... , t, 1188 888 J_� q r• •:.907 J.)C 1165 ` 66 1�i8 �2e .a 114,; 5 114 893 ID.1' t „er""u r 644 1361 i'„ +1' 1 18 87Q •,,i'1 GJ 300 Q� s\.�+ti• 87, X340 fi,1i`rt. ., g nW i.:►;i'h 1064 ;.k� `;�,'r*�;J J r ":".1111g, w 107- . VA' ;�;t�a�,lh ±,>. 1048 ` 1'9AF ' aji�/�*1R >``\ 1 \,)i,,y `795.a 102- - �'� ',,0;011*aRY,' ,• 4 729 / / �i,76 � i 9/7� 254 729 %i jormaim 00�'�y 4497 :,153 '.-. z / '/ � -,2 7r ____________________ $* \�‘ %' ' ,44 \t•*r`�`�►�'4'•1,4∎A { So w." $ J 658 ,iii:01∎11 1�`��c �\ • t ':? G T 1� /1 546. Y.1c 66 ;iii':4a\�\��`��'t,Ya�� 111:11 , . / / 1r5 s�%�'+►�\`�\���i i`�r�iit. r i \ T �. r� 61. _icy, �At� 4..∎``22MArr� t <..1 tea• i }' ' + a �'; /(,//¢I , lai..��\a,1% '' 270 i X= 33 'lift jt/% slim,�- .S}:•..-��f;;0,.. 90 i ; 1028 r ,��vs,�. 'l�t+' ��,'i� - '1,404 ii f 0i:.� �f r,'v r�i •\'%.,-., -- -- 'IP.SIVer. 't n:41mow04:',"' ■ �I��pie \\ \� \ 910• \1}�• 174 ►�jii��/� . 887 —"I! � 15591 6 �i��'r I• 790 1{,, 90 _. c- 240 Z 4 b .� 110` � C71 Q� 120 9 Al io 1 c• .ice ; - .__I .4.121 ^\ ) X1444 N ....,t, v-,, arr 1g 41�, 9#4i 445 ,. I 10tpbit63921141?A 210 `' I 150 180 180 Travelling Cylinder Azimuth (TFO+AZI) [0]vs Centre to Centre Separation [50 ft/in] Project: Prudhoe Bay Site: PB Z Pad Well: Plan lvi Z-71 (NP)v6 Wellbore: Plan Z-71 Design: Plan#7b Z-71 v6 From Colour To MD F em 3300'md (9-5/8") to 10900'md (7" Scan interal 25 ft 41 500 Scale 1 inch - 100 ft All wells pass major risk 500 1000 _ N,^ 1000 1500 a� 1500 2000 o a �� 2000 3000 1° •� 0 3000 5000 m co o p� 5000 10000 v c^ N ,,,t*4#A444.l.„_Ilitaii 10000 15000 ti ii%f,4,� 1.Nr3a.,1;%nvd,r c ♦Iia::;.+envT1'1J►_hr,�o 220 `� 300 . :4S�I/�/ ��+'.'i.\ 40 „� `.�.0 /L...% i_Biwa.; ►.\�,,(I-.�r�7.l�∎. 270 ��E`,r�I�%ETA ir14k,plIMi/rio�_ :Zig s3a riorkl:yr-_„„r/Arympver 4 ie.-millmaki.1/4, _41'1010440;d1/**: r PVILP1141114k, ���'� LLB�s•..,,t4�'• /i/� `. %����I��` f' /le''/ 1111\\V\ 240 /,/ grei ��/�C►�,''' . .i/ liArtillet iali,`\\X 120 --11"111.761--1 IS i V'SS:11174.1 iiii Tift /4110_17-411- grill e.‘ -ijp.:;...-* . 44,' ,,..■till■r: - AVA71114q■ ♦.:4# . .U:k::,r-64,.7_-,..,. -, ,--,./0„,.„.,,..,;/,PO-:.,1..4,,0, ... ,) ' :,:`\\ 210 X '/� .,I�l.� '��,�\\ 150 180 Travelling Cylinder Azimuth (TFO+AZI) [°]vs Centre to Centre Separation [100 ft/in] Project: Prudhoe Bay Site: PB Z Pad Well: Plan lvi Z-71 (NP)v6 Wellbore: Plan Z-71 Design: Plan #7b Z-71 v6 From Colour To MD From 10800'md (7") to TD Scan interal 25 ft 41 500 Scale 1 inch : 100 ft — All wells pass major risk 500 1000 _ 1000 1500 1500 2000 2000 3000 3000 5000 5000 10000 / 1 \ -, 10000 15000 330 330 v 30 -- \ / 27 \ \` i ���. \ . / / z ------- ----- ---, N 220 \ \ \ �\ . /Z'''' '''300 �j /j - � 0 /% ' /_ � \\\\ \ ' //I . \\ / ' / / /7- / // /r, - —- -.- -._ ---., N \ '' \\ //7/ / / / V, // '\ \\ \ \ \ \ \ \ \ AO-\ Al \ -11 / 1 41"—/-- i i / / / //7 /7 7(7 z , 5 \ \ \ \ i ' ( I 270 I \ I 1 90 \ \ I � �I� / i / JJ-._._. 5_5..//.�� \``\ \ \\\ \ :� � / l / � TAI• \'--1//,,,///7// /7;//' ////I, Vs, — -\ \ \ \,. --- \ „ . ___ ---- ___ __ y / / /It I I \ \ N\\ \- \ \ ,N. - \\\\N N,-•,. _..,_-_______.. _ ... ........_---___ - , .---,,,, ////1 /7'/ ,/ / 2ao / 120 N \ - i - - 27 --/ . \ % -- _ N- -�� / 210 — 150 180 Travelling Cylinder Azimuth (TFO+AZI) [0]vs Centre to Centre Separation [100 ft/in] A 1 I I 1 1 . . INUM IIM ,L1 •-------,4. 18 § I [ 11 1 I 1 1 1 Tri 71 .., 7.'--- 7 27 1'.' 2. L'' 1 4-1- ........, , 3.04 r R ' ; ..1. L-L ...... ... 1 21 'c' ii,2 ti„,,, e e GM • .4,„ ---, .!... ..... et—T,1 - c\I 4 irletirl' j I t..tv L i ec 17.—a- (..) -7, -...J 1 LC I 1 la it 1 1 1*,1 Id 2 .1 AI 1 lr 1 1 14 111 Xli s 1 1 I fat 61 1 ... ---11 I 24 3 - 011 *-- @ . ga LA /14 ik , i ". . I 1 I il . _, 0, , __ L IN i . 3'..; is) -' I I - 1 ii :J . LA ),.., 3 OC-----' 1 ii a." }._.., -.4 1 CI II 1 3 ,, I , / 4 1 1 ; 4— ' : , s / , P I '1:31 I Vim I ' I ! I I 11 I: t 7--; , tt t ' ,11L1 t \ 0 X t \ -- 0 1-°, ❑ Q W \ w ~ N v°I m L] rnxx Li I- ) tr)I I 1 „ o n° "' O � Z � vicn I D I „�F f 203 Q I 1 20 6 34105 m 11 N ' c SL I 0 (i P ".1 U- p",214 g 2 I . — ''o ,40211 � 0 I 115 113` ''t' o oS -215 E 216 61 w to v' ` 65 70 I CV a 62 57 w u' 2 a 66 S() .- 51�2"I 50 55 r •20 I4.4� m S 19 N 18 46 in li I I 101, •17 SLOT r----- ■16 o ,- I i SLOT2 I i 11 15 1 `r' 1 - N SLOT 1 I ■14 ' W • -■13 M 1.--o I F- t t\ IJ 24 • ! 112 ,' W `, 23 •• I I .11 Q 22 ■ ..0 I 39 I g 21 • 7) __ .'� ti9� a Ln N { P-5048 - Lea- -- c� 1 P-504A o up i- _ - =f 1'111 -( N 1°3-11041 2 I u \I 116 104_°-' 1 u° ' r I 12 °� 1 10227 I ■3 ! N e- I-21025 106 g Lu -' 29 ' 15- N �p � i 30 ■ 6112 U .'� 0`) I 31 • ' •7 l[1 i; 1 (I) \ f 32 • I •6 �,CI) \\ \ �--r-33 1 I ■9 \ t 1 L 4 ■ \ f 1 N i \ ■` X811 ■35 c°� t. \ CID \ i 37 \ \ --= - 1 --f L ■3g ...2 v W I r ------ - _I9E6 ll F d , ! �1 I li 1 I i ' m 1 I • Cr ii Al O __ NC �. I' J OW0 ' CC,EtrZ II" � J zco —1 J J J —I —I �F.12l CJN. 111 4176 6 - LU TRANSMITTAL LETTER CHECKLIST WELL NAME /a ' - - 7/ — PTD# 2 / 30 . .4 / Development Service Exploratory Stratigraphic Test Non-Co entional Well / ((7,FIELD: .vim Gz �'�.¢e_ _ POOL: r�l t.,�- y / Check Box for Appropriate Letter/Paragraphs to be Included in Transmittal Letter CHECK ADD-ONS WHAT (OPTIONS) TEXT FOR APPROVAL LETTER APPLIES MULTI LATERAL The permit is for a new wellbore segment of existing well (If last two digits in Permit No. ,API No. 50- - - 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/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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