OPERATORS · TEXAS · P-5 NUMBER 125944

Calpine Natural Gas L.P.

WindowAll time 90 days 1 year 3 years 10 years

CountyWebb 36 Brazoria 2 Goliad 1 Live Oak 1

40 FILINGS · 38 PERMITS · PAGE 1 OF 1 · BY ISSUE DATE

Issued	Permit	Type	County	Lease / well	Depth	Status	API	Operator change
Sep 21, 2005	606596	Recompletion	Webb	Mayers Gas Unit 4 #5	9,480	Final completion	47936207	Now Arete Operating Company LLC
Sep 21, 2005	606595	Recompletion	Webb	South Callaghan Ranch #41	8,400	—	47935185	Now Aldine Oil and Gas LP
Sep 12, 2005	605943	Recompletion	Webb	South Callaghan Ranch #52	7,850	Side one multi completion	47935333	Now Rosetta Resources Operating LP
Aug 10, 2005	604046	Recompletion	Webb	Santos #5	10,268	—	47937591	Now Arete Operating Company III LLC
Jul 28, 2005	604048	Recompletion	Webb	Santos #1	9,660	—	47932296	Now Arete Operating Company III LLC
Jul 11, 2005	603131	Recompletion	Webb	South Callaghan Ranch #192	8,900	Final completion	47938344	Now Aldine Oil and Gas LP
May 11, 2005	600552	Recompletion	Webb	Lilia Bruni #5	10,392	—	47932871	Now Rosetta Resources Operating LP
Apr 15, 2005	560524	Recompletion	Webb	Bruni-Summers #13	9,286	Final completion	47936979	Now Arete Operating Company III LLC
Jan 14, 2005	556110	Recompletion	Webb	S. J. Martin #B 9	9,550	Side one multi completion	47937723	Now Arete Operating Company III LLC
Oct 22, 2004	552595	Recompletion	Webb	South Callaghan Ranch #31	8,450	—	47935078	Now Rosetta Resources Operating LP
Oct 13, 2004	552090	Recompletion	Webb	South Callaghan Ranch #61	8,000	—	47935398	Now Rosetta Resources Operating LP
Oct 12, 2004	552117	Recompletion	Webb	South Callaghan Ranch #97	8,934	—	47935639	Now Rosetta Resources Operating LP
Oct 11, 2004	552043	Recompletion	Webb	South Callaghan Ranch #98	8,667	—	47935610	Now Aldine Oil and Gas LP
Jun 4, 2004	546443	Recompletion	Live Oak	Block 76 Unit #2	7,850	Unperforated completion	29700646	Now Hedrick Production Inc.
May 28, 2004	546198	Recompletion	Webb	South Callaghan Ranch #6	9,001	Final completion	47933429	Now Rosetta Resources Operating LP
Apr 26, 2004	544822	Recompletion	Webb	John Mayers #11	11,000	Final completion	47938479	Now Rosetta Resources Operating LP
Mar 22, 2004	541984	Recompletion	Webb	Cookie McKendrick #1	9,416	Final completion	47937100	Now White Oak Operating Company LLC
Feb 18, 2004	542099	Recompletion	Webb	South Callaghan Ranch #77	7,547	Final completion	47935459	Now Rosetta Resources Operating LP
Feb 17, 2004	542048	Recompletion	Webb	Schwarz, E. H. #19	9,200	—	47937002	Now Arete Operating Company III LLC
Jan 22, 2004	540745	Recompletion	Webb	F. J. Gill #5	11,000	Final completion	47936880	Now TX Energy Services LLC
Jan 15, 2004	540767	Recompletion	Webb	P. H. Stanford #5	9,100	Final completion	47938426	Now Aldine Oil and Gas LP
Dec 23, 2003	539859	Recompletion	Webb	South Callaghan Ranch #205	10,500	Final completion	47938416	Now Aldine Oil and Gas LP
Dec 18, 2003	539865	Recompletion	Webb	South Callaghan Ranch #200	8,800	Final completion	47938383	Now Aldine Oil and Gas LP
Dec 4, 2003	538257	Recompletion	Webb	South Callaghan Ranch #209	8,235	Final completion	47938397	Now Aldine Oil and Gas LP
Nov 18, 2003	538625	Recompletion	Webb	Martin Sophie J. #3	9,200	—	47932508	Now Arete Operating Company III LLC
Nov 18, 2003	538625Amendment	Recompletion	Webb	Martin, Sophie J. #3	9,200	Final completion	47932508	Now Arete Operating Company III LLC
Nov 7, 2003	538253	Recompletion	Webb	Fausto #5	10,500	—	47937394	Now Arete Operating Company III LLC
Oct 10, 2003	537360	Recompletion	Webb	Mayers, John #11	11,000	Final completion	47938479	Now Rosetta Resources Operating LP
Sep 16, 2003	536014	Recompletion	Webb	Martin, J. C. 111 #3	9,400	Final completion	47932375	Now Arete Operating Company III LLC
Sep 4, 2003	536013	Recompletion	Webb	Martin, J. C. 111 #16	9,567	—	47936691	Now Arete Operating Company III LLC
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
Jun 3, 2003	532698	Recompletion	Webb	South Callaghan Ranch #84	9,300	—	47935536	Now Rosetta Resources Operating LP
May 2, 2003	531471	Recompletion	Webb	South Callaghan Ranch #146	9,500	Final completion	47936638	Now Aldine Oil and Gas LP
Jan 21, 2003	527545	Recompletion	Brazoria	Lockhart Bank Unit 1 #5	10,000	Final completion	03931871	Now Hockley Energy Inc.
Nov 1, 2002	525183	Recompletion	Brazoria	Lockhart Bank Unit 1 #4	9,640	Final completion	03931826	Now Hockley Energy Inc.
Jul 28, 1992	401672	Recompletion	Goliad	Borchers-O'Connor #1	2,280	Final completion	17532629	Acquired from Bridge Oil Production Co., Inc.