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402283402 02 2020-01-13T17:50:32.787-07:00 10110 GREAT WESTERN OPERATING COMPANY LLC

1001 17TH STREET #2000

DENVER CO 80202 Erin Lind 720 595-2255 Erin Lind Lead Regulatory Analyst 2020-01-13T17:50:32.787-07:00 2020-01-13T17:50:32.727-07:00 UPLOADED elind 2020-01-13T09:51:27.54-07:00 elind elind@gwogco.com 6.00000 elind@gwogco.com masonm masonm 2020-01-14T09:55:39.12-07:00 402283402 DR N Y OIL Unplanned Sidetrack SINGLE N Brant LE 08-039HC 23506 SENE 11 1S 67W 6 285 WATTENBERG FEL 2126 90750 4973 FNL ADAMS HORIZONTAL 460 370 FWL FEE 515 FNL 12 FEE 1S 67W 19 Previously attached map FEL 515 0 FNL 8 276 1S 66W FEET FEET N N N Y OFFSITE Commercial Disposal 05 001 10344 01 20160041 ANNULAR PREVENTOR DOUBLE RAM ROTATING HEAD 39.980975 -104.847759 2017-08-10T00:00:00-06:00 CHAD MEIERS 1.3 false false false false false false false false false false false false false false false FEE false Surface Use Agreement 460 FEET T1S-R67W Sec. 12 (ALL) T1S-R66W Sec. 7 & 8 (ALL) FEET true 318A OFFSITE Commercial Disposal true false false false false false true false false false false false true false N/A County true true Approved false Administrative Use by Special Review 2018-11-01T00:00:00-06:00 402283402 i. An 8-1/2” hole was drilled to 20,878 / 7600’ MD/TVD. Due to unexpected geologic conditions, the lateral entered the Carlisle shale. Great Western will carry out an open hole sidetrack and re-drill the well so that it avoids the Carlisle shale. ii. TMD reached in the wellbore being plugged back is 20,878’. iii. Operations carried out to date: a. 13-1/2” surface hole was drilled to 1802’ MD/TVD b. 9-5/8” surface casing was run and cemented at 1802’ MD/TVD c. 8-1/2” hole was drilled to TD of 20,878 / 7600’ MD/TVD. iv. No fish will be left in the hole. v. No cement plugs will be set. vi. No cement plugs will be set. vii. Estimated sidetrack point will be 19,100’ / 7614’ MD/TVD. viii. The proposed objective formation will not be changed and will be the Codell. ix. The proposed BHL for the sidetrack will not change from the original BHL. x. Approval to proceed was given by Diana Burn via email at 9:50 AM on 1/13/20. 402283402 402283402 FORM 2 SUBMITTED 402283402.pdf 402283402 402283712 CORRESPONDENCE COGCC Correspondence.pdf 79228 402283402 402283736 WELLBORE DIAGRAM Brant LE 08-039HC-ST01 - Reg - Schematic - 20200113.pdf 100920 402283402 402284560 DEVIATED DRILLING PLAN Brant LE 08-039HC-ST01 - Dir - Plot - 20200113.pdf 271143 402283402 402284572 DIRECTIONAL DATA Brant LE 08-039HC-ST01 - Dir - COGCC - 20200113.xlsm 40151 402283402 1ST 8 1 2 5 1 2 17 23506 3072 23506 0 PLANNED 402283402 SURF 13 1 2 9 5 8 36 1802 800 1802 0 0 PLANNED 402283402 CODELL CODL 407-2246 1923 SEC 12, 7 & 8: ALL Thread was being aborted.