OPERATORS · TEXAS · P-5 NUMBER 180543

Costilla Energy, Inc.

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CountyLavaca 6 Brooks 5 Victoria 4 Crane 4 Wharton 3 Howard 3 Jim Wells 3 Tom Green 3 Bee 3 Matagorda 2

43 PERMITS · PAGE 1 OF 1 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Dec 8, 1999	490095	Recompletion	Wharton	Duncan "B" #5	4,895	Final completion	48132226	Now Hilcorp Energy Company
Mar 10, 1999	483105	Recompletion	Matagorda	Weinheimer, E. A. #2	9,680	Final completion	32131443	Now Sue-Ann Operating L.C.
Dec 1, 1998	481152	Recompletion	Lavaca	Pilgreen #1	14,500	Final completion	28532624	Now Dominion Oklahoma Texas E&P Inc
Nov 23, 1998	480369	Recompletion	Tom Green	Robertson, J. D. "C" #17	5,000	Final completion	45100864	—
Nov 17, 1998	480763	Recompletion	Victoria	Urban -A- #2	3,890	—	46930666	Now Petra Oleum Corp.
Oct 26, 1998	480238	Recompletion	Lavaca	Robertson -F- #9	2,620	Final completion	28532513	Now Dominion Oklahoma Texas E&P Inc
Sep 28, 1998	479759	Recompletion	Ward	Greer McGinley Gas Unit #1	21,603	Final completion	47510729	Now Petro-Hunt Permian LLC
Aug 4, 1998	478409	Recompletion	Victoria	Urban -A- #2	4,130	Final completion	46930666	Now Petra Oleum Corp.
Feb 25, 1998	473794	Recompletion	Tom Green	Robertson, John D. -C- #28	5,500	Final completion	45132044	Now Compass Operating L.L.C.
Feb 5, 1998	472980	Recompletion	Crane	Caprock TXL #2J	9,220	Final completion	10334524	Now Concho Resources Inc.
Dec 9, 1997	470968	Recompletion	Crane	Edwards 14 #O 6	8,550	Final completion	10334528	Now Slant Operating LLC
Dec 9, 1997	470966	Recompletion	Crane	Edwards 14 #J 5	8,550	Final completion	10334509	Now Slant Operating LLC
Dec 8, 1997	470867	Recompletion	Victoria	Zimmer, J. #2	2,300	Final completion	46901275	Now Petra Oleum Corp.
Nov 17, 1997	470130	Recompletion	Victoria	Zimmer, John #8	1,900	Final completion	46930578	Now Petra Oleum Corp.
Nov 4, 1997	469084	Recompletion	Tom Green	Robertson, John D. -C- #2	4,600	Final completion	45100849	Now Compass Operating L.L.C.
Nov 3, 1997	469302	Recompletion	Harris	Josey, L. #5	6,400	Final completion	20132256	Now Hamman Oil & Refining Company
Oct 29, 1997	469083	Recompletion	Crane	Edwards 14 #D 4	10,500	Final completion	10334508	Now Slant Operating LLC
Oct 7, 1997	468434	Recompletion	Matagorda	Weinheimer, E. A. #2	9,900	Final completion	32131443	Now Sue-Ann Operating L.C.
Sep 15, 1997	467296	Recompletion	Colorado	East Hamel G.U. 4 #2	10,494	Final completion	08931212	Now Zone Ridge Operating LLC
Aug 27, 1997	466740	Recompletion	Lavaca	Borchers #5LU	3,800	—	28530226	Now Petra Oleum Corp.
Aug 26, 1997	466739	Recompletion	Lavaca	Borchers, William #9	4,455	Final completion	28530244	Now Petra Oleum Corp.
Aug 25, 1997	466629	Recompletion	Lavaca	Borchers, William #14	2,370	Final completion	28530399	Now Petra Oleum Corp.
Jul 22, 1997	465145	Recompletion	Limestone	Tucker #1	7,900	Final completion	29330714	Now Diversified Production LLC
Jul 2, 1997	464529	Recompletion	Howard	Christian "E" #4701H	9,500	—	22734905	—
Jun 18, 1997	463971	Recompletion	Howard	Kimble "K" #2801	9,000	Final completion	22735033	—
May 30, 1997	462833	Recompletion	Duval	Garcia, Estella -A- #4	6,650	Final completion	13136876	Now B.P. Productions Inc.
May 29, 1997	463074	Recompletion	Howard	Hamlin 18 #1	9,000	Final completion	22734950	—
May 20, 1997	462081	Recompletion	Duval	Garcia, Estella #7	6,085	Final completion	13136656	Now B.P. Productions Inc.
Mar 7, 1997	459611	Recompletion	Lee	Baldridge, P. #1H	15,000	—	28730335	Now Smith Brothers Oil & Gas Inc.
May 23, 1996	446729	Recompletion	Bee	Fox "D" #1	5,132	Final completion	02532286	Acquired from Costilla Petroleum Corporation
Feb 7, 1995	432528	Recompletion	Jim Wells	Wolters #1	5,500	Final completion	24932156	Acquired from Parker & Parsley Development L.P
Apr 29, 1994	423328	Recompletion	Jim Wells	Wolters #1	5,520	Final completion	24932156	Acquired from Bridge Oil Company, L. P.
Jan 18, 1994	420277	Recompletion	Wharton	Rogers, Evelyn #1	5,012	Final completion	48133253	Acquired from Pg&e Resources Company
Apr 28, 1992	398807	Recompletion	Jim Wells	Wolters #1	5,700	Final completion	24932156	Acquired from Bridge Oil Company, L. P.
Mar 25, 1992	397729	Recompletion	Bee	Fox "D" #1	3,980	Final completion	02532286	Acquired from Bridge Oil Production Co., Inc.
Apr 27, 1988	345698	Recompletion	Brooks	Scott & Hopper #32	7,200	—	04730853	Acquired from Exxon Corp.
May 13, 1986	302049	Recompletion	Bee	Fox "D" #1	5,600	Final completion	02532286	Acquired from TXO Production Corp.
Apr 22, 1986	301329	Recompletion	Brooks	Scott & Hopper #32	7,200	—	04730853	Acquired from Exxon Corp.
Mar 19, 1985	269973	Recompletion	Brooks	Scott & Hopper #32	7,200	Unsuccessful workover	04730853	Acquired from Exxon Corp.
Jan 4, 1985	263041	Recompletion	Brooks	Sullivan, D. J. "B" #34	8,340	Final completion	04730142	Acquired from Exxon Corp.
Jun 13, 1984	241773	Recompletion	Brooks	Sullivan, D. J. "B" #17	9,131	Unsuccessful workover	04700313	Acquired from Exxon Corp.
Aug 16, 1983	205824	Recompletion	Wharton	Reynolds #2	7,950	—	48131267	Acquired from TXO Production Corp.
Oct 8, 1981	139886	Recompletion	Lavaca	Mitchell "E" #1	9,500	Final completion	28500393	Acquired from TXO Production Corp.