OPERATORS · TEXAS · P-5 NUMBER 780233

Sierra Resources, LLC

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44 FILINGS · 37 PERMITS · PAGE 1 OF 1 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Jun 28, 2008	664352	Drill	Hidalgo	McGill Bros. #701	13,200	Plugged dry hole (P&A)	21533836	—
Dec 28, 2007	650664	Drill	Hidalgo	Olivarez-Van Dresar Unit #5	12,500	—	21533764	—
Dec 28, 2007	650590	Drill	Hidalgo	Olivarez-Van Dresar Unit #4	12,500	—	21533765	—
Dec 3, 2007	650549	Drill	Hidalgo	McGill Bros. #700	13,330	Unperforated completion	21533749	—
Oct 22, 2007	648019	Drill	Hidalgo	Dresar, Van #1	11,450	—	21533725	—
Oct 22, 2007	648019Amendment	Drill	Hidalgo	Dresar, Van #1	12,250	—	21533725	—
Oct 22, 2007	648009	Drill	Hidalgo	Olivarez-Van Dresar Unit #3	11,500	—	21533724	Now Paladin Petroleum III L.L.C.
Oct 22, 2007	648009Amendment	Drill	Hidalgo	Olivarez-Van Dresar Unit #3	11,490	Final completion	21533724	Now Paladin Petroleum III L.L.C.
Oct 18, 2007	647801	Drill	Hidalgo	Hargrove Heirs #4	12,420	—	21533722	—
Oct 18, 2007	647799	Drill	Hidalgo	Hargrove Heirs #3	11,450	—	21533723	—
May 16, 2007	638502	Drill	Hidalgo	Hargrove Heirs #2	12,100	—	21533648	—
May 16, 2007	638502Amendment	Drill	Hidalgo	Hargrove Heirs #2	12,100	Final completion	21533648	—
May 16, 2007	638501	Drill	Hidalgo	Hargrove Heirs #1	11,200	Final completion	21533647	—
Jul 17, 2006	622692	Drill	Hidalgo	Hinojosa "A" #5	11,300	Final completion	21533503	Now Hilcorp Energy Company
Apr 6, 2006	617098	Drill	Hidalgo	Garza et al Unit #6	11,800	Final completion	21533466	Now Hilcorp Energy Company
Apr 3, 2006	616900	Recompletion	Hidalgo	Barrera Unit #4	10,730	Final completion	21532836	Now Hilcorp Energy Company
Mar 7, 2006	615386	Drill	Hidalgo	Barrera, C., Dr. #1	9,200	Final completion	21533452	Now Hilcorp Energy Company
Mar 6, 2006	615264	Drill	Hidalgo	Trevino Estate et al Unit #7	9,900	—	21533451	—
Mar 6, 2006	615263	Drill	Hidalgo	Trevino Estate et al Unit #6	10,000	Final completion	21533450	Now Chesapeake Operating Inc.
Feb 10, 2006	613996	Drill	Hidalgo	Garza et al Unit #5	11,400	Final completion	21533444	Now Hilcorp Energy Company
Jan 24, 2006	612903	Drill	Hidalgo	Trevino Estate et al Unit #5	9,200	Final completion	21533431	Now Hilcorp Energy Company
Dec 15, 2005	611086	Drill	Hidalgo	Barrera, Teresa Trust #1	9,550	Final completion	21533415	Now Hilcorp Energy Company
Nov 22, 2005	609952	Drill	Hidalgo	Barrera Unit #6	10,500	Final completion	21533405	Now Hilcorp Energy Company
Oct 5, 2005	607388	Drill	Hidalgo	Garza, et al Unit #4	11,770	—	21533386	Now Hilcorp Energy Company
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 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
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