| Blocker Ranch-State A G-4-198873 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 255 | 176K | Nov 2003 – Sep 2022 |
| Hubberd - Frost Nat'l. Bank G.U. G-4-75912 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 247 | 16.8M | Jan 1993 – Jan 2018 |
| University Block 33 17 & 18 G.U. G-9-80058 | DJH Oil & Gas LLC only | Howards Creek (Canyon) | Crockett | 1 | 246 | 514K | Jan 1993 – Jan 2022 |
| Harris-Munden GU G-6-232046 | Craton Operating LLC only | Blocker (Travis Peak) | Harrison | 1 | 242 | 27.6K | May 2007 – Feb 2012 |
| Shovlin Vehle G-4-230931 | Block "T" Petroleum, Inc. only | Las Hermanitas (House Sand) | Duval | 1 | 235 | 711K | Jul 2007 – Apr 2026 |
| Shaw Gas Unit G-6-215269 | Diversified Production LLC only | Blocker (Cotton Valley) | Harrison | 1 | 225 | 33.9K | Aug 2005 – Sep 2007 |
| Muley B O-10-62197 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 2 | 221 | 0 | Jan 2025 – Dec 2025 |
| University 12 G-9-118669 | Ozark Exploration, Inc. only | Block 51 (Strawn) | Crockett | 1 | 219 | 35.5K | Jan 1993 – Dec 2000 |
| Watson, L. A. -B- G-10-65878 | Mobil Producing TX. & N.M. Inc. only | Block 16 (Ellen.) | Ward | 1 | 205 | 69.9K | Jan 1993 – Jul 1997 |
| Blocker Ranch 1846 G-4-206936 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 204 | 77.9K | Oct 2004 – Sep 2016 |
| George, T.W. Gas Unit "B" G-6-218523 | Sponte Operating, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 201 | 663K | Nov 2005 – Jan 2016 |
| S.T. 23-L N/2 SW/4 G-3-271503 | Energy Xxi Texas Onshore, LLC only | Block 23L (LH-13) | High IS-LB | 1 | 200 | 20K | May 2013 – Jun 2013 |
| Blocker, W. T. O-13-23963 | Dynamic Production, Inc. only | Park Springs (Congl.) | Wise | 1 | 194 | 5.39K | Jan 1993 – May 1994 |
| Block 1 & 71 O-8-15359 | Del-Mar Petroleum only | Stephens County Regular | Stephens | 1 | 191 | 10 | Jan 1993 – Oct 1993 |
| Weatherby - Weatherby Gas Unit G-4-161940 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 191 | 6.35M | Jan 1997 – Apr 2026 |
| State University -DN- O-10-21351 | Citation Oil & Gas Corp. only | Block 16 (Cherry Canyon) | Ward | 1 | 187 | 1 | Sep 1993 – Sep 1993 |
| State Tract 335-L N/2 NW/4 G-3-152626 | Fairways Spec. Sales & Serv Inc only | Brazos Block 309 (Miocene 7200) | Brazos-LB | 1 | 187 | 912K | Oct 1994 – Jan 1997 |
| Glasscock 'S' Fee G-10-208635 | Burk Royalty Co., Ltd. only | Block 32 (Wolfcamp) | Glasscock | 1 | 185 | 60.8K | Feb 2005 – Apr 2026 |
| State Tract 369-L, NE/4 G-3-68294 | American Coastal Energy, Inc. only | Block 368-L (Miocene B) | Brazos-LB | 1 | 184 | 1.04M | Jan 1993 – May 2000 |
| State Block 483-L G-3-81915 | Vamos Oil & Gas, LLC only | Matagorda Island 483-L (Massive) | Matgrda IS-LB | 1 | 184 | 553K | Aug 1997 – Nov 1999 |
| Hoff, Edwina G-2-137803 | Block "T" Petroleum, Inc. only | Arneckeville, S. (Y-1,OIL) | De Witt | 1 | 182 | 28K | Jan 1993 – Aug 1995 |
| Tubb Estate "22" G-10-156421 | Impetro Operating LLC only | Block C - 23 (Silurian) | Winkler | 1 | 176 | 1.75M | Jun 1995 – Feb 2013 |
| University "14" O-10-35966 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 1 | 175 | 0 | Oct 1998 – Mar 2004 |
| Glasscock "W" Fee O-10-36931 | Chevron U. S. A. Inc. only | Block 32 (Wolfcamp) | Glasscock | 1 | 175 | 17.1K | Jun 2002 – Oct 2003 |
| McElroy Ranch Co. "F" G-9-143738 | Ocean Energy, Inc. only | Block 42 (Penn) | Upton | 1 | 174 | 24.2K | Jan 1993 – Mar 1995 |
| University -37- O-10-28350 | Arco Oil & Gas Co. only | Block 31 (Devonian) | Crane | 1 | 169 | 163 | Jan 1993 – Feb 1993 |
| Sturges GU G-6-213849 | Diversified Production LLC only | Blocker (Travis Peak) | Harrison | 1 | 166 | 21.7K | Jul 2005 – Apr 2006 |
| Brazos Block 479-L G-3-162016 | Capco Offshore of Texas, Inc. only | Brazos Block 479-L (X 1 Sand) | Brazos-LB | 1 | 166 | 6.53M | Jun 1997 – Jul 2004 |
| Crump, W. E. G-10-43137 | Q Natural Resources, LLC only | Miller Block B-29 (Penn.) | Ward | 1 | 164 | 301K | Jan 1993 – Sep 2023 |
| Bath Gas Unit "B" G-6-188352 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 162 | 1.05M | Jan 2002 – Apr 2026 |
| Pyote Gas Unit No. 11 G-10-50561 | XTO Energy Inc. only | Block 16 (Devonian) | Ward | 1 | 160 | 1.05M | Jan 1993 – Mar 2026 |
| University "J" O-9-9465 | Vanco Oil & Gas Corp. only | Block 46, East (Grayburg) | Crockett | 1 | 159 | 20 | Jan 1993 – Jan 1998 |
| Waddell, W. N. et Al O-10-37773 | Burlington Res O & G Co-Midland only | Block B-27 (Connell) | Crane | 1 | 159 | 17.3K | Jul 2006 – May 2007 |
| Waddell, W. N., et Al G-10-19631 | Burlington Res O & G Co-Midland only | Block 27 (McKee) | Crane | 1 | 156 | 594K | Jan 1993 – Feb 2015 |
| 440 L Unit G-3-169862 | Capco Offshore of Texas, Inc. only | Brazos Block 440 (-V-Sd.) | Brazos-LB | 1 | 150 | 247K | Sep 2004 – May 2009 |
| State Tract 747-L G-4-68928 | Sterling Energy, Inc. only | Block 749 (CH) | Mustang IS-LB | 1 | 150 | 911K | Jan 1993 – Apr 2003 |
| Hathaway, J. F. O-10-39492 | Eagle Rock Operating Company,llc only | Estes Block 34 (Penn.) | Ward | 1 | 149 | 0 | May 2009 – Jul 2009 |
| Block 58 State 32 G-10-224464 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 148 | 433K | Dec 2006 – Jan 2017 |
| Fasken Block "BA" O-10-23703 | Union Oil Company of California only | Lowe (Atoka) | Andrews | 1 | 146 | 6.87K | Jan 1993 – Feb 1993 |
| Shovlin Vehle G-4-241021 | Block "T" Petroleum, Inc. only | Las Hermanitas (House Sand) | Duval | 1 | 142 | 1.54M | May 2008 – Apr 2026 |
| Blocker Ware G-6-176630 | GMX Resources Inc. only | Blocker (Travis Peak) | Harrison | 1 | 137 | 16K | Feb 2000 – Mar 2000 |
| Blocker Ranch-State A G-4-215032 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 129 | 297K | Oct 2005 – Sep 2022 |
| Fasken Block -EF- Acct. 2 O-10-11014 | Parish, John R. only | Fasken (Wolfcamp) | Andrews | 1 | 128 | 0 | Apr 1996 – Apr 1996 |
| Briscoe Tract 35,BLOCK 3 G-4-91605 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 126 | 179K | Jan 1993 – Sep 2018 |
| State Tract 369-L NE/4 G-3-149105 | Black Elk Energy Offshore OP LLC only | Block 368-L (5250 F.B.-1) | Brazos-LB | 1 | 124 | 2.64M | Mar 1994 – Nov 2005 |
| Weatherby, L.C. Gas Unit G-4-133007 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 118 | 7.2M | Jan 1993 – Jun 2016 |
| Wernecke "B" G-4-210402 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 118 | 1.9M | May 2005 – Apr 2026 |
| S.T. 23-L N/2 SW/4 G-3-271916 | Energy Xxi Texas Onshore, LLC only | Block 23-L (LH-0) | High IS-LB | 1 | 113 | 34.8K | Oct 2013 – Aug 2014 |
| State of Texas -T- G-10-19621 | Olsen Energy Inc. only | Block 12 (Yates) | Andrews | 1 | 111 | 14.5K | Jan 1993 – Dec 2025 |
| State Tract 336-L G-3-135735 | Fairways Spec. Sales & Serv Inc only | Brazos Block 336-L (R-43, FB II) | Brazos-LB | 1 | 111 | 150K | Jan 1993 – Sep 1993 |