OPERATORS · RRC 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 651 Recompletion 10 Reenter 2 Reclass 1

677 PERMITS · PAGE 1 OF 14 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Jun 27, 2006	621631	Drill	Tarrant	McMahon #2HH	8,900	Spudded	43931682	Now Formentera Operations LLC
Jun 26, 2006	621561	Drill	Parker	Smelley #6HH	8,900	Spudded	36734068	Now Devon Energy Production Co L.P.
Jun 26, 2006	621560	Drill	Parker	Smelley #7HH	8,900	Spudded	36734067	Now Devon Energy Production Co L.P.
Jun 26, 2006	621559	Drill	Hood	Nance, Kathy #1HH	8,900	Final completion	22131134	Now Devon Energy Production Co L.P.
Jun 15, 2006	621083	Drill	Tarrant	Parchman #1HH	8,900	Final completion	43931662	—
Jun 12, 2006	620736	Drill	Parker	C.J. Edwards Unit #1HH	8,900	Final completion	36734051	Now Formentera Operations LLC
Jun 12, 2006	620734	Drill	Hood	Ator #1HH	8,900	Spudded	22131123	Now Devon Energy Production Co L.P.
Jun 9, 2006	620731	Drill	Hood	Ator #2HH	8,900	Spudded	22131122	Now Devon Energy Production Co L.P.
Jun 9, 2006	620729	Drill	Parker	Moore Price #1HH	8,900	Spudded	36734050	Now Devon Energy Production Co L.P.
Jun 9, 2006	620729	Drill	Parker	Moore-Price #1HH	8,900	—	36734050	Now Devon Energy Production Co L.P.
Jun 9, 2006	620729	Drill	Parker	Moore-Price #1HH	8,900	Final completion	36734050	Now Devon Energy Production Co L.P.
Jun 8, 2006	620648	Drill	Parker	Ray Unit #3HH	8,900	Final completion	36734046	Now Formentera Operations LLC
May 30, 2006	620103	Drill	Hill	Igr Unit #1HH	8,900	Final completion	21730411	Now Formentera Operations LLC
May 25, 2006	619829	Drill	Tarrant	Murrin Bear Creek #2HH	8,900	Final completion	43931629	Now Formentera Operations LLC
May 22, 2006	619682	Drill	Parker	Western Lake #2HH	8,900	Final completion	36734019	Now Formentera Operations LLC
May 12, 2006	619221	Drill	Hood	Swaim Unit #1HH	8,900	Final completion	22131115	Now Devon Energy Production Co L.P.
May 12, 2006	619126	Drill	Tarrant	Lumbermen #1HH	8,900	Final completion	43931620	Now Formentera Operations LLC
May 5, 2006	618776	Drill	Parker	Clark #1HH	8,900	Final completion	36734003	Now Formentera Operations LLC
May 1, 2006	618241	Drill	Wise	Burress, Etta #1HH	8,900	Final completion	49736030	Now BKV Barnett LLC
Apr 26, 2006	618245	Drill	Tarrant	Donegal Hills #3HH	8,900	Final completion	43931602	Now Formentera Operations LLC
Apr 24, 2006	618088	Drill	Tarrant	Alliance 'J' Unit #J 1HH	8,000	Final completion	43931598	Now Diversified Production LLC
Apr 20, 2006	617849	Drill	Tarrant	Alliance-Freeway East Unit #2	6,000	—	43931594	—
Apr 17, 2006	617662	Drill	Parker	Helm #2HH	8,900	Final completion	36733984	Now Devon Energy Production Co L.P.
Apr 11, 2006	617362	Drill	Parker	Durant South Unit #1HH	8,900	Final completion	36733981	Now Devon Energy Production Co L.P.
Apr 10, 2006	617288	Drill	Parker	Durant East Unit #1HH	8,900	Final completion	36733980	Now Devon Energy Production Co L.P.
Apr 4, 2006	616909	Drill	Hill	Gonzales Unit #1HH	8,900	Final completion	21730402	Now Formentera Operations LLC
Apr 4, 2006	616908	Drill	Denton	PKF North Unit #1HH	8,900	Final completion	12132829	Now BKV Barnett LLC
Mar 30, 2006	616735	Drill	Tarrant	McMahon #1HH	8,900	Final completion	43931571	Now Formentera Operations LLC
Mar 30, 2006	616732	Drill	Tarrant	Alliance-Freeway East Unit #1HH	8,900	—	43931570	—
Mar 28, 2006	616549	Drill	Parker	Durant North Unit #1HH	8,900	Final completion	36733967	Now Devon Energy Production Co L.P.
Mar 15, 2006	615897	Drill	Denton	Alliance-TCS #2HH	8,900	Spudded	12132816	Now Diversified Production LLC
Mar 15, 2006	615897	Drill	Denton	Alliance-TCS #2HH	8,900	Final completion	12132816	Now Diversified Production LLC
Mar 15, 2006	615896	Drill	Parker	Faxel #3HH	8,900	—	36733954	Now Formentera Operations LLC
Mar 15, 2006	615895	Drill	Johnson	Brazos Point #1HH	8,900	Final completion	25130846	Now Devon Energy Production Co L.P.
Feb 28, 2006	614953	Drill	Johnson	Bontke Trust Unit #1HH	8,900	Final completion	25130818	Now Devon Energy Production Co L.P.
Feb 27, 2006	614905	Drill	Hill	Gatlin South Unit #1HH	8,900	Final completion	21730396	Now Formentera Operations LLC
Feb 23, 2006	614763	Drill	Parker	Tyler Trust South #1HH	8,900	Final completion	36733929	Now Devon Energy Production Co L.P.
Feb 17, 2006	614419	Drill	Johnson	Miller #1HH	8,900	Final completion	25130805	Now Formentera Operations LLC
Feb 17, 2006	614417	Drill	Parker	Durant West Unit #1HH	8,900	Final completion	36733923	Now Devon Energy Production Co L.P.
Feb 15, 2006	614240	Drill	Hill	Ellison Unit #1HH	8,900	Final completion	21730394	Now Formentera Operations LLC
Feb 8, 2006	613805	Drill	Parker	Williams Unit #1HH	8,900	—	36733913	Now Devon Energy Production Co L.P.
Feb 8, 2006	613805	Drill	Parker	Williams Unit #1HH	8,900	Final completion	36733913	Now Devon Energy Production Co L.P.
Feb 3, 2006	613572	Drill	Johnson	Buck Unit #1HH	8,900	Final completion	25130778	Now Devon Energy Production Co L.P.
Feb 3, 2006	613571	Drill	Tarrant	Alliance-GWS Unit #1HH	8,900	Final completion	43931508	Now Diversified Production LLC
Feb 3, 2006	613570	Drill	Denton	Alliance #B 4	5,000	—	12132781	Now Eagleridge Operating LLC
Feb 3, 2006	613570	Drill	Denton	Alliance #B 4	3,751	Final completion	12132781	Now Eagleridge Operating LLC
Feb 3, 2006	613517	Drill	Parker	Snipes Unit #1HH	8,900	Final completion	36733905	Now Devon Energy Production Co L.P.
Feb 2, 2006	613512	Drill	Parker	Western Lake #1HH	8,900	Final completion	36733904	Now Formentera Operations LLC
Jan 31, 2006	613331	Drill	Tarrant	Oliver "a" Unit #14HH	8,900	Final completion	43931499	Now Devon Energy Production Co L.P.
Jan 31, 2006	613329	Drill	Hill	Mastin South Unit #1HH	8,900	Final completion	21730393	Now Formentera Operations LLC