OPERATORS · TEXAS · P-5 NUMBER 148219

Chief Oil & Gas LLC *

WindowAll time 90 days 1 year 3 years 10 years

CountyTarrant 408 Denton 86 Parker 61 Wise 55 Johnson 21 Hill 19 Hood 16 Jack 10 Concho 1

TypeDrill 517 Recompletion 10 Reenter 1 Reclass 1

677 FILINGS · 555 PERMITS · PAGE 2 OF 14 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Jan 31, 2006	613328	Drill	Hill	Island Grove Ranch Unit #1HH	8,900	Final completion	21730392	Now Formentera Operations LLC
Jan 24, 2006	612905	Drill	Wise	Craig #1HH	8,900	Final completion	49735964	Now BKV Barnett LLC
Jan 24, 2006	612904	Drill	Parker	Ray Unit #2HH	8,900	Final completion	36733886	Now Formentera Operations LLC
Jan 19, 2006	612662	Drill	Tarrant	Oliver "a" Unit #13	4,600	—	43931484	Now Devon Energy Production Co L.P.
Jan 19, 2006	612661	Recompletion	Denton	Vista Manufacturing #3	8,742	—	12131027	Now BKV Barnett LLC
Jan 13, 2006	612401	Drill	Johnson	Linville East Unit #1HH	8,900	Final completion	25130737	Now Devon Energy Production Co L.P.
Jan 13, 2006	612400	Drill	Parker	Reilly Bear Creek #1HH	8,900	Final completion	36733873	Now Formentera Operations LLC
Jan 13, 2006	612398	Drill	Tarrant	Alliance-Cartwright Unit #2HH	8,900	Spudded	43931478	Now Diversified Production LLC
Jan 9, 2006	612074	Drill	Hill	Boyd Unit #1HH	8,900	Final completion	21730390	Now Devon Energy Production Co L.P.
Jan 5, 2006	611901	Recompletion	Wise	Blase "C" #1	6,700	—	49735137	Now Devon Energy Production Co L.P.
Dec 19, 2005	611249	Drill	Johnson	South Johnson SWD #1	11,200	—	25130703	—
Dec 15, 2005	611082	Drill	Hill	Johnson Central Unit #1HH	8,900	Final completion	21730386	Now Formentera Operations LLC
Dec 14, 2005	611004	Drill	Johnson	Gatlin Unit #1HH	8,900	Final completion	25130687	Now Formentera Operations LLC
Dec 14, 2005	611003	Drill	Tarrant	Alliance "G" Unit #G 1HH	8,000	Final completion	43931443	Now Eagleridge Operating LLC
Dec 14, 2005	611002	Drill	Denton	Alliance - TCS #1HH	8,900	Final completion	12132740	Now Eagleridge Operating LLC
Dec 14, 2005	610999	Drill	Johnson	George Land Co. Unit #1HH	8,900	Final completion	25130686	Now Formentera Operations LLC
Nov 21, 2005	609839	Drill	Hill	Johnson East Unit #1HH	8,900	Spudded	21730384	Now Formentera Operations LLC
Nov 21, 2005	609838	Drill	Hill	Mastin Central Unit #1HH	8,900	Final completion	21730383	Now Formentera Operations LLC
Nov 21, 2005	609836	Drill	Hill	Ross Unit #1HH	8,900	Final completion	21730382	Now Formentera Operations LLC
Nov 15, 2005	609430	Drill	Denton	Alliance-TCN #3	8,900	—	12132723	Now Eagleridge Operating LLC
Nov 15, 2005	609428	Drill	Denton	Alliance-TCN #2HH	8,900	—	12132722	Now Eagleridge Operating LLC
Nov 15, 2005	609426	Drill	Denton	Alliance-TCN #1HH	8,900	Final completion	12132721	Now Eagleridge Operating LLC
Nov 14, 2005	609416	Drill	Tarrant	Donegal Hills #2HH	8,900	Final completion	43931413	Now Formentera Operations LLC
Nov 14, 2005	609413	Drill	Johnson	Porterfield #1HH	8,900	Final completion	25130632	Now Formentera Operations LLC
Nov 2, 2005	608840	Drill	Hill	Mastin North Unit #1HH	8,900	Spudded	21730380	Now Formentera Operations LLC
Oct 26, 2005	608489	Drill	Parker	Cooper Unit #1HH	8,900	Final completion	36733822	Now Formentera Operations LLC
Oct 26, 2005	608488	Drill	Tarrant	Murrin Bear Creek #1HH	8,900	Final completion	43931386	Now Formentera Operations LLC
Oct 11, 2005	607664	Drill	Hill	Castle Unit #1HH	8,900	Final completion	21730377	Now Formentera Operations LLC
Oct 4, 2005	607303	Drill	Wise	Burress Unit #2HH	8,900	Final completion	49735911	Now BKV Barnett LLC
Oct 3, 2005	607220	Drill	Johnson	Pipes Unit #1HH	8,900	Final completion	25130571	Now Devon Energy Production Co L.P.
Sep 23, 2005	606862	Drill	Hill	Winterman Unit #1HH	8,900	Final completion	21730375	Now Formentera Operations LLC
Sep 19, 2005	606482	Drill	Hill	Martindale Unit #1HH	8,900	Final completion	21730374	Now Formentera Operations LLC
Sep 19, 2005	606481	Drill	Hill	O'Rear Unit #1HH	8,900	Final completion	21730373	Now Formentera Operations LLC
Aug 31, 2005	605707	Drill	Parker	Helm #1HH	8,900	Final completion	36733778	Now Devon Energy Production Co L.P.
Aug 30, 2005	605637	Drill	Hill	Johnson West Unit #1HH	8,900	Final completion	21730371	Now Formentera Operations LLC
Aug 10, 2005	604774	Drill	Johnson	Reagan Unit #1HH	8,900	Final completion	25130497	Now Formentera Operations LLC
Aug 9, 2005	604632	Drill	Johnson	Gist Unit #1HH	8,900	Final completion	25130494	Now Formentera Operations LLC
Aug 9, 2005	604631	Drill	Parker	Mitchell, W. G. #1HH	8,900	Final completion	36733764	Now Formentera Operations LLC
Aug 9, 2005	604630	Drill	Denton	Alliance-Tech Center #2HH	8,900	Final completion	12132654	Now Eagleridge Operating LLC
Aug 9, 2005	604629	Drill	Denton	Alliance-Tech Center #1HH	8,900	Final completion	12132655	Now Eagleridge Operating LLC
Aug 1, 2005	604173	Drill	Johnson	Linville West Unit #1HH	8,900	Final completion	25130483	Now Formentera Operations LLC
Jul 28, 2005	604082	Drill	Parker	Davestates Unit #1HH	8,900	—	36733761	Now Formentera Operations LLC
Jul 28, 2005	604082Amendment	Drill	Parker	Davestates Unit #1HH	8,900	Final completion	36733761	Now Formentera Operations LLC
Jul 13, 2005	603345	Drill	Johnson	Scott Unit #1HH	8,900	Final completion	25130462	Now Formentera Operations LLC
Jul 11, 2005	603219	Drill	Tarrant	Alliance-Cartwright Unit #1HH	8,900	Final completion	43931305	Now Eagleridge Operating LLC
Jul 6, 2005	603034	Drill	Tarrant	Jarvis Fossil Creek #2	8,900	Final completion	43931302	Now BKV Barnett LLC
Jul 6, 2005	603033	Drill	Tarrant	Jarvis Fossil Creek #1	8,900	Final completion	43931301	Now BKV Barnett LLC
Jul 1, 2005	602868	Drill	Parker	Coomer Unit #1HH	8,900	Final completion	36733744	Now Formentera Operations LLC
Jun 17, 2005	602227	Drill	Tarrant	Hyde-Hickman #1HH	8,900	Final completion	43931284	Now Formentera Operations LLC
Jun 15, 2005	602048	Drill	Parker	Ray Unit #1HH	8,900	Spudded	36733738	Now Formentera Operations LLC