| Aber Oil & Gas |
E.Tex Woodbine, Rodessa, Pettit |
| AEC Energy |
B.C. Jean Marie |
| Amber Energy |
B.C. Turner Valley |
| Anderson O & G |
Confidential |
| Antero Resources |
Barnette Shale |
| Aurora Resources |
Eagleford |
| Beau Canada Ltd. |
B.C. Jean Marie |
| Berry Petroleum |
Haynesville |
| BP America |
E.Texas Jurassic |
| Brammer Engineering |
Various |
| Burk Royalty |
Various Reservoirs |
| Cabot O & G |
E.Texas James Lm |
| Camterra Res’s, Inc. |
James Lm, CV Sd, Haynesville Shale |
| Chalker III |
Confidential |
| Chief O & G |
Barnette Shale |
| Classic Hydrocarbons |
Arklatex Jurassic |
| CW Resources, Inc. |
E. Tex Rodessa, CV Sand |
| Cimarex Energy |
Permian Basin Various, Tonkawa Sd |
| Classic Hydrocarbons |
Arklatex Mesozoic & Jurassic |
| Common Resources |
Haynesville Shale |
| Comstock Resources |
Cotton Valley Sd, Haynesville Shale |
| Conoco-Phillips |
Eagleford |
| Corsair Energy, LLC |
Shelf Margin Austin Chalk |
| Crimson Energy |
Brazos Basin Mesozoic |
| Dale Operating |
Barnette Shale |
| David H. Arrington |
Mississippi Neal Shale |
| Devon Energy |
E. Tex Mesozoic Various, Bossier Sd,
Jurassic Sds, Woodford Sh, Granite Wash |
| Delta Petroleum |
Southeast TX Austin Chalk |
| Diversity Petroleum |
E.Tex. Cotton Valley Sand |
| EEC Petroleum |
Oklahoma Skinner Sand |
| El Paso Prod’n Corp |
Arklatex James Lm, Indiana New
Albany, Haynesville |
| Ellora Energy |
Arklatex James Lm |
| EnCana Oil & Gas |
Niobrara |
| Enervest, LTD |
E.Tex Cotton Valley Sands |
| Enexco Energy |
E.Tex James Lm |
| EOG Resources |
Buda; Georgetown; James; CV Sd |
| Etoco, LP |
N. Louisiana CV |
| Forest Oil Co. |
Haynesville Shale, Granite Wash |
| Geosouthern Energy |
C.Tex Austin Chalk, Buda, Eagleford |
| Goodrich Petroleum |
Eagleford |
| Hallwood Resources |
Brazos Basin Buda |
| Highland Energy |
Caddo LS |
| Houston Petroleum |
Confidential |
| Hunt Petroleum |
E.Tex James Lime |
| Hunt Oil Company |
E.Tex Sligo |
| Indigo Minerals |
Confidential |
| Ironwood O &G |
Arklatex CV Sd |
| Jones Energy |
C.Tex Austin Chalk |
| JW Operating |
Cotton Valley Sd, Haynesville |
| Krescent Energy |
SE Tex Austin Chalk |
| Lone Star Energy |
SW Morocco Jurassic |
| Machin & Assoc., Inc. |
N.LA Jurassic, E.Tex James Lm |
| Magnum Hunter |
Marcellus, Eagleford |
| Magnum Res’s, Inc. |
N.LA James Lm |
| Marathon Oil Co. |
Astn Chk, Pecan Gap; Bossier Sd |
| Marathon Canada |
B.C. Yoyo Field |
| Millenium Offshore |
E.Tex Lower Cretaceous |
| Navidad Resources |
Brazos Basin Buda |
| Noble Energy, Inc. |
Oklahoma Shallow |
| Palmer Petrol., Inc. |
Brazos Basin Buda |
| Pegasi Petroleum Co. |
E. Texas Lwr Cretaceous |
| Phillips Petroleum |
E.Texas James Lm |
| Pinnacle Op’g, Inc. |
N.LA James Lm |
| Pogo Producing |
Austin Chalk |
| Primary Natural Res’s |
Mid-Cont Muddy Sand |
| Princess Three Corp. |
E. Tex multiple conventional |
| Range Resources, Inc. |
E.Tex James Lm |
| Red Rock Energy Ptnrs |
E.Tex Mesozoic Various |
| Rippy Oil Co |
Eagleford |
| Riverstone Energy |
S. Arkansas Sligo |
| R.K.I. |
Confidential |
| R. Lacy, Inc. |
Saratoga |
| Rockport Energy |
Maverick Basin Lwr. Cretaceous |
| Rosetta Resources |
Eagleford |
| Ross Production |
E.Tex Pecan Gap, Rodessa |
| Silver Oak Op’g |
E.Tex & N.LA Various |
| SM Energy (St. Mary) |
Haynesville |
| Southwestern En. |
Fayetteville , Marcellus, James Lm |
| Stephens Prod |
Atoka Sds |
| Stroud Energy Co. |
C.Tex Wilcox, Astn Chalk, Buda, |
Georgetown |
| Sulphur River Prod. |
NE Texas Lower Jurassic |
| Suncoast Tech. Svcs |
N. Louisiana Lwr Tertiary |
| Suncor Energy |
B.C. Jean Marie |
| SW Operating |
E.Tex Woodbine |
| US Operating Co. |
C.Tex Chalk, E.Tex Rodessa |
| Westside Energy |
Barnett Shale |
| Winn Exploration |
Confidential |
| XTO Energy |
Eagleford, E.Tex Pettit, James Lm,
Haynesville, Fayetteville,
Permian Basin Devonian |