OPERATORS · TEXAS · P-5 NUMBER 125944

Calpine Natural Gas L.P.

61 PERMITS · PAGE 1 OF 2 · BY ISSUE DATE

IssuedPermitTypeCountyLease / wellDepthStatusAPIOperator change
Oct 28, 2005608458DrillColoradoGold #15,000Final completion08932455Now Everest Resource Company
Oct 28, 2005608456DrillColoradoR. Turner Gas Unit #15,000Spudded08932456Now VT Vistatex Energy LLC
Oct 10, 2005607595DrillColoradoKilimanjaro Gas Unit #118,500Plugged dry hole (P&A)08932452—
Aug 22, 2005604780DrillWebbRottersman #3910,000—47939249—
Aug 9, 2005604581DrillWebbSouth Callaghan Ranch #2309,000—47939239—
Jul 18, 2005603490DrillChambersState Tract 100 Unit #211,000Final completion07132305Now Davis Petroleum Corp.
Jul 13, 2005603300DrillColoradoDanklefs #14,800Spudded08932432Now Everest Resource Company
Jul 13, 2005603300DrillColoradoDanklefs #14,798Final completion08932432Now Everest Resource Company
Feb 28, 2005558212DrillWebbSouth Callaghan Ranch #2319,000Final completion47939040Now Rosetta Resources Operating LP
Jan 13, 2005555941DrillColoradoWaligura Unit #110,000Spudded08932398Now Rosetta Resources Operating LP
Jan 13, 2005555941DrillColoradoWaligura Unit #110,020Final completion08932398Now Rosetta Resources Operating LP
Dec 3, 2004554234DrillChambersState Tract 100 Unit #113,540Final completion07132285Now Davis Petroleum Corp.
Nov 29, 2004554014DrillColoradoCelestina Ammann Unit #B 110,000—08932394Now Weathers Exploration Inc.
Nov 29, 2004554014DrillColoradoCelestina Ammann Unit #B 110,000Side one multi completion08932394Now Weathers Exploration Inc.
Mar 22, 2004543498DrillWebbM. M. A. Cattle Co. #1111,000Final completion47938667Now Arete Operating Company LLC
Feb 19, 2004542215DrillWebbSouth Callaghan Ranch #2298,000Unperforated completion47938639Now Rosetta Resources Operating LP
Jan 23, 2004541096DrillWebbSouth Callaghan Ranch #22610,000Side one multi completion47938617Now Aldine Oil and Gas LP
Dec 10, 2003539478DrillWebbSouth Callaghan Ranch #2199,700Final completion47938578Now Rosetta Resources Operating LP
Jul 18, 2003533400DrillWebbSouth Callaghan Ranch #21810,000Final completion47938463Now Aldine Oil and Gas LP
Jul 18, 2003533398DrillWebbSouth Callaghan Ranch #21610,000—47938462—
Jul 17, 2003534310DrillWebbMayers, John #1111,000Final completion47938479Now Rosetta Resources Operating LP
May 22, 2003532071DrillWebbSouth Callaghan Ranch #21410,000Final completion47938427Now Rosetta Resources Operating LP
May 16, 2003532028DrillWebbStanford, P. H. #510,000Final completion47938426Now Aldine Oil and Gas LP
May 7, 2003531506DrillWebbSouth Callaghan Ranch #20510,500Final completion47938416Now Aldine Oil and Gas LP
May 7, 2003531505DrillWebbSouth Callaghan Ranch #21110,300—47938415—
Apr 14, 2003530726DrillWebbSouth Callaghan Ranch #20910,000Final completion47938397Now Aldine Oil and Gas LP
Apr 14, 2003530725DrillWebbSouth Callaghan Ranch #20310,000Final completion47938396Now Rosetta Resources Operating LP
Apr 4, 2003530228DrillWebbSouth Callaghan Ranch #20010,000Final completion47938383Now Aldine Oil and Gas LP
Mar 27, 2003529400DrillWebbSouth Callaghan Ranch #19510,000Final completion47938360Now Aldine Oil and Gas LP
Mar 5, 2003529220DrillWebbSouth Callaghan Ranch #1929,500Final completion47938344Now Aldine Oil and Gas LP
Feb 24, 2003528597DrillWebbSouth Callaghan Ranch #19410,000Unperforated completion47938336Now Rosetta Resources Operating LP
Feb 13, 2003528323DrillWebbSouth Callaghan Ranch #19310,000Final completion47938330Now Aldine Oil and Gas LP
Jan 31, 2003527949DrillWebbSouth Callaghan Ranch #1889,500Plugged dry hole (P&A)47938318—
Jan 10, 2003527191DrillWebbSouth Callaghan Ranch #1919,500Final completion47938304Now Aldine Oil and Gas LP
Dec 18, 2002526354DrillWebbSouth Callaghan Ranch #1819,500Final completion47938283Now Aldine Oil and Gas LP
Nov 20, 2002525729DrillWebbSouth Callaghan Ranch #18510,000Final completion47938269Now Aldine Oil and Gas LP
Nov 1, 2002525184DrillWebbSouth Callaghan Ranch #1839,900—47938248Now Aldine Oil and Gas LP
Nov 1, 2002525184DrillWebbSouth Callaghan Ranch #1839,900Final completion47938248Now Aldine Oil and Gas LP
Aug 6, 2002522576DrillWebbMcKendrick #110,000—47938185—
Aug 6, 2002522576DrillWebbChevron-McKendrick #110,000—47938185—
Aug 6, 2002522576DrillWebbMcKendrick, W. H. Jr. #110,000Unperforated completion47938185—
Jul 10, 2002521753DrillWebbGill, F. J. #1811,000Final completion47938161Now Arete Operating Company LLC
Jun 26, 2002521396DrillWebbMayers #1410,800—47938150Now Arete Operating Company III LLC
Jun 26, 2002521396DrillWebbMayers #1410,800Final completion47938150Now Arete Operating Company III LLC
Dec 18, 2001516260DrillWebbPena, H. L. #810,500—47938005Acquired from Calpine Natural Gas Company
Dec 18, 2001516260DrillWebbPena, H. L. #810,500—47938005Acquired from Calpine Natural Gas Company
Dec 18, 2001516260DrillWebbPena, H. L. #810,500Final completion47938005Acquired from Calpine Natural Gas Company
Sep 20, 2001513779DrillWebbGJM Gas Unit II #111,500Final completion47937946Acquired from Michael Petroleum Corporation
Mar 26, 2001507034DrillZapataBruni Mineral Trust #2411,500Unperforated completion50534323Acquired from Michael Petroleum Corporation
Feb 12, 2001505211DrillZapataBruni Mineral Trust #2311,500Unperforated completion50534295Acquired from Michael Petroleum Corporation