OPERATORS · TEXAS · P-5 NUMBER 125944

Calpine Natural Gas L.P.

WindowAll time 90 days 1 year 3 years 10 years

CountyWebb 79 Colorado 9 Goliad 6 Zapata 6 Chambers 2 Brazoria 2 Live Oak 1

105 FILINGS · 91 PERMITS · PAGE 2 OF 3 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Sep 4, 2003	536013Amendment	Recompletion	Webb	Martin, J. C. III #16	9,567	Final completion	47936691	Now Arete Operating Company III LLC
Sep 2, 2003	535735	Recompletion	Webb	South Callaghan Ranch #52	7,850	Final completion	47935333	Now Rosetta Resources Operating LP
Aug 20, 2003	535590	Recompletion	Webb	Stanford, P. H. #5	9,100	Final completion	47938426	Now Aldine Oil and Gas LP
Aug 12, 2003	535255	Recompletion	Webb	Schwarz, E. H. #21	9,200	Final completion	47937232	Now Arete Operating Company III LLC
Aug 6, 2003	535030	Recompletion	Webb	Summers, Bruni #22	10,800	Final completion	47937997	Now Arete Operating Company III LLC
Jul 18, 2003	533400	Drill	Webb	South Callaghan Ranch #218	10,000	Final completion	47938463	Now Aldine Oil and Gas LP
Jul 18, 2003	533398	Drill	Webb	South Callaghan Ranch #216	10,000	—	47938462	—
Jul 17, 2003	534310	Drill	Webb	Mayers, John #11	11,000	Final completion	47938479	Now Rosetta Resources Operating LP
Jun 3, 2003	532698	Recompletion	Webb	South Callaghan Ranch #84	9,300	—	47935536	Now Rosetta Resources Operating LP
May 22, 2003	532071	Drill	Webb	South Callaghan Ranch #214	10,000	Final completion	47938427	Now Rosetta Resources Operating LP
May 16, 2003	532028	Drill	Webb	Stanford, P. H. #5	10,000	Final completion	47938426	Now Aldine Oil and Gas LP
May 7, 2003	531506	Drill	Webb	South Callaghan Ranch #205	10,500	Final completion	47938416	Now Aldine Oil and Gas LP
May 7, 2003	531505	Drill	Webb	South Callaghan Ranch #211	10,300	—	47938415	—
May 2, 2003	531471	Recompletion	Webb	South Callaghan Ranch #146	9,500	Final completion	47936638	Now Aldine Oil and Gas LP
Apr 14, 2003	530726	Drill	Webb	South Callaghan Ranch #209	10,000	Final completion	47938397	Now Aldine Oil and Gas LP
Apr 14, 2003	530725	Drill	Webb	South Callaghan Ranch #203	10,000	Final completion	47938396	Now Rosetta Resources Operating LP
Apr 4, 2003	530228	Drill	Webb	South Callaghan Ranch #200	10,000	Final completion	47938383	Now Aldine Oil and Gas LP
Mar 27, 2003	529400	Drill	Webb	South Callaghan Ranch #195	10,000	Final completion	47938360	Now Aldine Oil and Gas LP
Mar 5, 2003	529220	Drill	Webb	South Callaghan Ranch #192	9,500	Final completion	47938344	Now Aldine Oil and Gas LP
Feb 24, 2003	528597	Drill	Webb	South Callaghan Ranch #194	10,000	Unperforated completion	47938336	Now Rosetta Resources Operating LP
Feb 13, 2003	528323	Drill	Webb	South Callaghan Ranch #193	10,000	Final completion	47938330	Now Aldine Oil and Gas LP
Jan 31, 2003	527949	Drill	Webb	South Callaghan Ranch #188	9,500	Plugged dry hole (P&A)	47938318	—
Jan 21, 2003	527545	Recompletion	Brazoria	Lockhart Bank Unit 1 #5	10,000	Final completion	03931871	Now Hockley Energy Inc.
Jan 10, 2003	527191	Drill	Webb	South Callaghan Ranch #191	9,500	Final completion	47938304	Now Aldine Oil and Gas LP
Dec 18, 2002	526354	Drill	Webb	South Callaghan Ranch #181	9,500	Final completion	47938283	Now Aldine Oil and Gas LP
Nov 20, 2002	525729	Drill	Webb	South Callaghan Ranch #185	10,000	Final completion	47938269	Now Aldine Oil and Gas LP
Nov 1, 2002	525184	Drill	Webb	South Callaghan Ranch #183	9,900	—	47938248	Now Aldine Oil and Gas LP
Nov 1, 2002	525184Amendment	Drill	Webb	South Callaghan Ranch #183	9,900	Final completion	47938248	Now Aldine Oil and Gas LP
Nov 1, 2002	525183	Recompletion	Brazoria	Lockhart Bank Unit 1 #4	9,640	Final completion	03931826	Now Hockley Energy Inc.
Aug 6, 2002	522576	Drill	Webb	McKendrick #1	10,000	—	47938185	—
Aug 6, 2002	522576Amendment	Drill	Webb	Chevron-McKendrick #1	10,000	—	47938185	—
Aug 6, 2002	522576Amendment	Drill	Webb	McKendrick, W. H. Jr. #1	10,000	Unperforated completion	47938185	—
Jul 10, 2002	521753	Drill	Webb	Gill, F. J. #18	11,000	Final completion	47938161	Now Arete Operating Company LLC
Jun 26, 2002	521396	Drill	Webb	Mayers #14	10,800	—	47938150	Now Arete Operating Company III LLC
Jun 26, 2002	521396Amendment	Drill	Webb	Mayers #14	10,800	Final completion	47938150	Now Arete Operating Company III LLC
Dec 18, 2001	516260	Drill	Webb	Pena, H. L. #8	10,500	—	47938005	Acquired from Calpine Natural Gas Company
Dec 18, 2001	516260Amendment	Drill	Webb	Pena, H. L. #8	10,500	—	47938005	Acquired from Calpine Natural Gas Company
Dec 18, 2001	516260Amendment	Drill	Webb	Pena, H. L. #8	10,500	Final completion	47938005	Acquired from Calpine Natural Gas Company
Sep 20, 2001	513779	Drill	Webb	GJM Gas Unit II #1	11,500	Final completion	47937946	Acquired from Michael Petroleum Corporation
Mar 26, 2001	507034	Drill	Zapata	Bruni Mineral Trust #24	11,500	Unperforated completion	50534323	Acquired from Michael Petroleum Corporation
Feb 12, 2001	505211	Drill	Zapata	Bruni Mineral Trust #23	11,500	Unperforated completion	50534295	Acquired from Michael Petroleum Corporation
Jan 26, 2001	504593	Drill	Webb	E. G. Ranch #2	10,500	—	47937722	Acquired from Michael Petroleum Corporation
Jan 26, 2001	504593Amendment	Drill	Webb	E. G. Ranch #2	10,500	Unperforated completion	47937722	Acquired from Michael Petroleum Corporation
Sep 12, 2000	499509	Reenter	Zapata	Vielmann-Ramirez #2	7,900	Final completion	50533238	Acquired from Michael Petroleum Corporation
Nov 1, 1995	441400	Reenter	Zapata	Vielmann- Ramirez #2	8,500	—	50533238	Acquired from Lyndel Exploration, Inc.
Aug 25, 1994	427386	Drill	Zapata	Vielmann-Ramirez #2	11,800	Plugged dry hole (P&A)	50533238	Acquired from Chevron U. S. A. Inc.
Jan 20, 1994	420307	Drill	Goliad	O'Connor, et Al #3	4,900	Final completion	17532758	Acquired from Bridge Oil Company, L. P.
Oct 13, 1993	417008	Drill	Goliad	O'Connor, et Al #2	3,900	Final completion	17532737	Acquired from Bridge Oil Company, L. P.
Dec 30, 1992	407735	Drill	Goliad	O'Connor Ranch G.U. 4 #1	3,100	Final completion	17532684	Acquired from Bridge Oil Production Co., Inc.
Nov 17, 1992	406179	Drill	Webb	South Callaghan Ranch #111	9,500	—	47935686	Acquired from Mobil Producing TX. & N.M. Inc.