| State Tract 562-L O-2-7602 | Tri-Union Development Corp. only | Matagorda Block 562-L (6470) | Matgrda IS-LB | 1 | 212K | 193K | Jan 1993 – Mar 2008 |
| Block 55-L SW/4 O-3-24634 | Seiran E & P Company, LLC only | High Island BLK.55-L (Disc. B) | High IS-LB | 2 | 196K | 271K | Feb 2004 – Jul 2026 |
| S.T. 560-L (SW) Unit O-2-10406 | Hall-Houston Expl. II, L.P. only | Matagorda Block 560-L (6900) | Matgrda IS-LB | 1 | 192K | 199K | Jul 2012 – Sep 2015 |
| Uls 5-27 O-10-41722 | Ovintiv USA Inc. only | Block 5 (Devonian) | Andrews | 1 | 187K | 29K | Jul 2011 – Jul 2026 |
| S.L. 75944 Block 55-L SW/4 O-3-21394 | Bandera Oil & Gas Inc only | High Island BLK.55-L (Disc. B) | High IS-LB | 1 | 161K | 261K | Jan 1993 – Jul 2026 |
| Block 55-L SW/4 O-3-24635 | Seiran E & P Company, LLC only | High Island Blk. 55-L (DB-6) | High IS-LB | 1 | 124K | 210K | Feb 2004 – Jul 2026 |
| Block 5 O.T. Unit O-8-26561 | Petex only | Stephens County Regular | Stephens | 1 | 102K | 1.52K | Jan 1993 – Jul 2026 |
| 8411 JV-P Blocr -5- O-10-30652 | BTA Oil Producers, LLC only | Block 5 (Wolfcamp) | Andrews | 1 | 100K | 209K | Jan 1993 – Sep 2022 |
| University Block 57 O-9-18314 | BVX Operating, Inc. only | Holt Ranch (Consolidated) | Schleicher | 3 | 91.2K | 1.4M | May 2013 – Jul 2026 |
| State Tract 563-L O-2-6865 | Tri-Union Development Corp. only | Matagorda Block 563-L (6936) | Matgrda IS-LB | 1 | 70.7K | 158K | Jan 1993 – Mar 2008 |
| State Tract 563 O-2-7970 | Tri-Union Development Corp. only | Matagorda Block 563-L (6517) | Matgrda IS-LB | 1 | 47.7K | 45.3K | May 1994 – Mar 2008 |
| State Tract 563-L O-2-7335 | Tri-Union Development Corp. only | Matagorda Block 563-L (6820) | Matgrda IS-LB | 1 | 28.8K | 48.3K | Jan 1993 – Mar 2008 |
| University 35 O-10-37458 | Zenergy, Inc. only | Block 5 (Devonian) | Andrews | 2 | 27.4K | 0 | Jun 2004 – Mar 2013 |
| Andrews University 33 O-10-37675 | Williams, Clayton Energy, Inc. only | Block 5 (Wolfcamp) | Andrews | 1 | 13.2K | 14.4K | Nov 2005 – Dec 2008 |
| University 22 O-10-37391 | Momentum Energy Corporation only | Block 5 (Devonian) | Andrews | 1 | 6.88K | 0 | Mar 2004 – Mar 2010 |
| State of Texas -AB- O-10-30806 | Texaco E & P Inc. only | Block 5 (Wolfcamp) | Andrews | 1 | 5.3K | 4.66K | Jan 1993 – Apr 1995 |
| Andrews University 21 O-10-37665 | Williams, Clayton Energy, Inc. only | Block 5 (Wolfcamp) | Andrews | 1 | 1.5K | 1.48K | Nov 2005 – Oct 2008 |
| Block 55-L SW/4 G-3-204073 | Seiran E & P Company, LLC only | High Island Blk. 55-L (DB-6) | High IS-LB | 1 | 0 | 480K | Jul 2004 – Jul 2026 |
| Block 55-L SW/4 G-3-207119 | Seiran E & P Company, LLC only | High Island BLK.55-L (Disc. B) | High IS-LB | 1 | 0 | 3.3M | Feb 2004 – Jul 2026 |
| Block 56-L S/2, SE/4 G-3-208600 | Seiran E & P Company, LLC only | High Island BLK.55-L (Disc. B-4) | High IS-LB | 1 | 0 | 1.9M | Oct 2004 – Jul 2026 |
| University 8 G-9-103448 | Red Stag Operating, LLC only | Block 51 (Strawn) | Crockett | 1 | 0 | 916K | Jan 1993 – Jul 2026 |
| University "11" G-9-118134 | Red Stag Operating, LLC only | Block 51 (Strawn) | Crockett | 1 | 0 | 354K | Jan 1993 – Jul 2026 |
| University 12 G-9-118669 | Ozark Exploration, Inc. only | Block 51 (Strawn) | Crockett | 1 | 0 | 35.5K | Jan 1993 – Jan 2002 |
| University 12 "E" G-9-118899 | Ozark Exploration, Inc. only | Block 51 (Strawn) | Crockett | 1 | 0 | 1.64M | Jan 1993 – Feb 2025 |
| University 15 G-9-125643 | Clayton Petroleum Corporation only | Block 51 (Strawn) | Crockett | 1 | 0 | 0 | Jan 1993 – Aug 1997 |
| University 12 G-9-251802 | Piedra Operating, LLC only | Block 51 (Strawn) | Crockett | 1 | 0 | 675 | Jan 2009 – Oct 2009 |
| Block 59 State 35 1 G-10-223577 | Permian Resources Operating, LLC only | Toyah, NW (Shale) | Reeves | 1 | 0 | 854K | Apr 2006 – Nov 2024 |
| Block 58 State 32 G-10-224464 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 0 | 433K | Dec 2006 – Jul 2018 |
| Block 59 State 27-11 G-10-232749 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 0 | 217K | Mar 2007 – Jul 2018 |
| State Tract 563-L G-2-111601 | Tri-Union Development Corp. only | Matagorda Block 563-L (5110) | Matgrda IS-LB | 1 | 0 | 0 | Jan 1993 – Mar 2007 |
| Block 58 State 42 G-10-244453 | Shell Western E&P only | Toyah, NW (Shale) | Reeves | 1 | 0 | 506K | Aug 2008 – Jul 2016 |
| Block 58 State 31-3 G-10-245061 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 0 | 511K | Feb 2008 – Apr 2018 |
| Block 59 State 36-7 G-10-245763 | Permian Resources Operating, LLC only | Toyah, NW (Shale) | Reeves | 1 | 0 | 1.16M | Sep 2007 – Sep 2023 |
| State Tract 562-L O-2-6876 | Tri-Union Development Corp. only | Matagorda Block 562-L (6390) | Matgrda IS-LB | 1 | 0 | 0 | Jan 1993 – Mar 2008 |
| State Tract 563-L O-2-6878 | Tri-Union Development Corp. only | Matagorda Block 563-L (Miocene) | Matgrda IS-LB | 1 | 0 | 0 | Jan 1993 – Nov 2008 |
| S.T. 560-L O-2-10758 | Hall-Houston Expl. II, L.P. only | Matagorda Block 560-L (7800) | Matgrda IS-LB | 1 | 0 | 0 | Dec 2012 – Jun 2015 |
| State of Texas "BV" O-10-38130 | Ovintiv USA Inc. only | Block 5 (Devonian) | Andrews | 1 | 0 | 0 | Jun 2005 – Jul 2026 |
| Block 59 State 36 O-10-38747 | COG Operating LLC only | Toyah Lake, West (Delaware) | Reeves | 1 | 0 | 0 | Apr 2008 – Sep 2020 |
| Block 59 State 27 O-10-38803 | COG Operating LLC only | Toyah Lake, West (Delaware) | Reeves | 1 | 0 | 0 | Apr 2008 – Jul 2018 |
| University 22 O-10-40656 | Sabalo II Operating, LLC only | Block 5 (Devonian) | Andrews | 1 | 0 | 0 | Aug 2010 – Jul 2026 |
| Williams Block 52 O-10-47852 | Noble Energy Inc only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 0 | 0 | Jul 2016 – Jul 2026 |
| Block 58 St 40-14 G-10-243000 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 0 | 705K | Jan 2008 – May 2018 |
| State Tract 563-L G-2-113813 | Tri-Union Development Corp. only | Matagorda Block 563-L (5110) | Matgrda IS-LB | 1 | 0 | 72.5K | Jan 1993 – Mar 2007 |
| State Tract 563-L G-2-114520 | Reunion Energy Company only | Matagorda Block 563-L (6517) | Matgrda IS-LB | 1 | 0 | 127K | Jan 1993 – Apr 1994 |
| State Tract 562-L G-2-115596 | Tri-Union Development Corp. only | Matagorda Block 562-L (6300) | Matgrda IS-LB | 1 | 0 | 0 | Jan 1993 – Mar 2007 |
| State Tract 563-L G-2-116831 | Tri-Union Development Corp. only | Matagorda Block 563-L (6517) | Matgrda IS-LB | 1 | 0 | 271K | Jan 1993 – Mar 2007 |
| State Tract 562-L G-2-130236 | Tri-Union Development Corp. only | Matagorda Block 562-L (6327) | Matgrda IS-LB | 1 | 0 | 0 | Jan 1993 – Mar 2007 |
| State Tract 562-L G-2-134145 | Tri-Union Development Corp. only | Matagorda Block 562-L (6000) | Matgrda IS-LB | 1 | 0 | 4.34K | Jan 1993 – Mar 2007 |
| Herring Ranch Block 55 G-2-135709 | Mooringsport Energy Prod. Co. only | Clayton (Wilcox 7370-Herring SD) | Live Oak | 1 | 0 | 46.6K | Jan 1993 – Jul 2026 |
| S.L. 75944, Block 55-L SW/4 G-3-86933 | Bandera Oil & Gas Inc only | High Island BLK.55-L (Disc. B) | High IS-LB | 1 | 0 | 0 | Jan 1993 – Jun 2008 |