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400287814 05 47120 KERR-MCGEE OIL & GAS ONSHORE LP

P O BOX 173779

DENVER CO 80217-3779 JOEL MALEFYT 720 929-6828 720 929-7828 JOEL MALEFYT REGULATORY ANALYST 2012-05-23T09:17:52.827-06:00 DRAFT jmalefyt 2012-05-23T09:17:52.827-06:00 jmalefyt JOEL.MALEFYT@ANADARKO.COM 0.00000 JOEL.MALEFYT@ANADARKO.COM lightc lightc 2012-06-22T16:03:25.773-06:00 400287814 05 123 35160 00 WELD BROWN 13C-26HZ SWSW 35 3N 66W 6 639 FSL WATTENBERG 725 467 90750 FSL FWL 556 FWL 2012-03-27T00:00:00-06:00 982 2012-04-10T00:00:00-06:00 FSL 2012-04-11T00:00:00-06:00 600 GW FWL 8075 7508 7883 7316 5020 5042 35 3N 66W 35 3N 66W Final Completion 400287814 GPS data, formation tops, and logs will be submitted with the final form 5 on API 05-123-35160-01. 400287814 400287814 FORM 5 SUBMITTED 400287814.pdf 400287814 400287904 CEMENT JOB SUMMARY BROWN 13C-26HZ SUR CMT TKT.pdf 662031 400287814 400288038 DIRECTIONAL SURVEY Brown 13C-26HZ_Survey Report - Geographic (Original Wellbore) - DRAFT.pdf 59214 400287814 400288046 DIRECTIONAL DATA BROWN 13C 26HZ Directional Data Template.xls 59904 400287814 400242716 02 ORIGINAL HOLE 400287814 400287932 02 NEW SIDE TRACK 400287814 1ST 8 7 8 7 26 7797 739 7797 7695 0 CALC ACTUAL 400287814 SURF 13 1 2 9 5 8 36 806 574 806 22 0 CALC ACTUAL 400287814 12993 1ST 7883 74 7695 8075 400287814 cement work 2012-04-11T00:00:00-06:00 400287814 cement work After drilling out of the 7” casing at 7,797’ MD, an attempt was made to orient the lateral drilling assembly upward to drill the Codell formation. However, due to a problem with the MWD (later diagnosed as erroneous programming), the assembly drilled downward toward the Carlisle formation. Drilling was stopped at 8,075’ MD before entering the Carlisle formation to troubleshoot the situation. A decision was made to plug the 278’ of open hole and sidetrack upward to the preferred position in the Codell formation. A cement plug was set from 8,075’ to 7,695’ MD. The well was sidetracked at 7,883’ and the lateral was drilled with no further problems. The sidetrack was unplanned. Thread was being aborted.