OPERATORS · TEXAS · P-5 NUMBER 780233

Sierra Resources, LLC

WindowAll time 90 days 1 year 3 years 10 years

CountyHidalgo 44 La Salle 14 McMullen 9 Kenedy 4 Live Oak 1

72 FILINGS · 61 PERMITS · PAGE 2 OF 2 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Oct 5, 2005	607388Amendment	Drill	Hidalgo	Garza, et al Unit #4	11,770	Final completion	21533386	Now Hilcorp Energy Company
Jul 1, 2005	602957	Drill	Hidalgo	Hinojosa "A" #4	10,500	Final completion	21533358	Now Hilcorp Energy Company
May 26, 2005	601284	Recompletion	Hidalgo	Hinojosa, F. G. #3	12,235	Final completion	21533180	Now Hilcorp Energy Company
Apr 14, 2005	560511	Drill	Kenedy	La Paloma Ranch #1	12,500	Final completion	26131382	—
Apr 5, 2005	560007	Drill	Hidalgo	Hinojosa-Longoria #1	12,300	Final completion	21533329	Now Hilcorp Energy Company
Feb 24, 2005	558164	Drill	Hidalgo	Hinojosa "A" #3	11,100	Final completion	21533314	Now Hilcorp Energy Company
Jan 26, 2005	556826	Drill	Hidalgo	Garza et al "B" Unit #4	10,500	Final completion	21533306	Now Hilcorp Energy Company
Dec 15, 2004	554893	Drill	Hidalgo	Barrera Unit #5	11,650	Final completion	21533287	Now Hilcorp Energy Company
Nov 29, 2004	554173	Drill	Hidalgo	Trevino Estate et al Unit #4	10,900	Final completion	21533280	Now Hilcorp Energy Company
Nov 2, 2004	553126	Drill	Hidalgo	Hinojosa, F.G. #4	10,500	Final completion	21533272	Now Hilcorp Energy Company
Oct 7, 2004	552016	Drill	Hidalgo	Garza, et al "B" Unit #3	10,600	Final completion	21533267	Now Hilcorp Energy Company
Sep 3, 2004	550512	Drill	Hidalgo	Hinojosa "A" #2	10,500	Final completion	21533250	Now Hilcorp Energy Company
Aug 17, 2004	549700	Drill	Hidalgo	Valdez et al Unit #3	10,500	Final completion	21533245	Now Hilcorp Energy Company
Jul 29, 2004	548900	Recompletion	Hidalgo	Hinojosa, F.G. #3	12,235	Final completion	21533180	Now Hilcorp Energy Company
May 6, 2004	545409	Drill	Kenedy	Stewart-Burns #1	18,000	Plugged dry hole (P&A)	26131362	—
Apr 1, 2004	543942	Drill	Hidalgo	Valdez et al Unit #2	13,500	Final completion	21533199	Now Hilcorp Energy Company
Feb 9, 2004	541860	Drill	Hidalgo	Hinojosa, F. G. #3	12,500	—	21533180	Now Hilcorp Energy Company
Feb 9, 2004	541860Amendment	Drill	Hidalgo	Hinojosa, F. G. #3	12,500	Final completion	21533180	Now Hilcorp Energy Company
Nov 20, 2003	538874	Drill	Hidalgo	Hinojosa et Al #4	9,500	—	21533159	Now Hilcorp Energy Company
Nov 20, 2003	538874Amendment	Drill	Hidalgo	Hinojosa et Al #4	9,500	Final completion	21533159	Now Hilcorp Energy Company
Sep 11, 2003	536346	Drill	Hidalgo	Hinojosa, F. G. #2	9,500	—	21533137	Now Hilcorp Energy Company
Sep 11, 2003	536346Amendment	Drill	Hidalgo	Hinojosa, F. G. #2	9,500	Final completion	21533137	Now Hilcorp Energy Company