| Briscoe Tract 20 Block 3 G-4-87289 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 31 | 114K | Jan 1993 – Sep 2019 |
| Fogle G-6-120942 | Buffco Production Inc. only | Blocker (Page) | Harrison | 1 | 31 | 19.5K | Jan 1993 – Dec 1995 |
| Block 72 State 36 G-10-228244 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 30 | 169K | Jun 2007 – Jul 2012 |
| Haynes, R. W. Gas Unit G-6-100001 | Fortune Resources LLC only | Blocker (Cotton Valley) | Harrison | 1 | 30 | 142K | Jan 1993 – Mar 2026 |
| Hubberd-Frost Nat'l Bank G/U G-4-153324 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 29 | 5.91M | Feb 1995 – Apr 2026 |
| University -B- G-10-228212 | Scout Energy Management LLC only | Block 31 (Queen) | Crane | 1 | 27 | 78.6K | Mar 2010 – Apr 2026 |
| High Island 24L, SL 59456 G-3-135226 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-G, KI) | High IS-LB | 1 | 26 | 7.03K | Mar 1995 – Mar 1995 |
| Block 58 State 42 G-10-244453 | Shell Western E&P only | Toyah, NW (Shale) | Reeves | 1 | 25 | 506K | Aug 2008 – Mar 2015 |
| University O-9-14532 | Reliance Operating Company only | Block 38 (Ellenburger) | Irion | 1 | 24 | 128 | Dec 1996 – Jan 1999 |
| Blocker Heirs G-6-258076 | Comstock Oil & Gas, LLC only | Carthage (Haynesville Shale) | Harrison | 1 | 22 | 2.38M | Apr 2010 – Apr 2026 |
| Weatherby, L.C. Gas Unit G-4-125661 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 21 | 25.3M | Jan 1993 – Apr 2026 |
| Block 31 Unit G-10-165880 | Hilcorp Energy Company only | Block 31 (Queen) | Crane | 1 | 20 | 143K | Oct 1997 – Apr 2026 |
| University G-10-169547 | Scout Energy Management LLC only | Block 31 (Queen) | Crane | 1 | 19 | 534K | Jun 1998 – Apr 2026 |
| Blocker Ware G-6-253050 | Comstock Oil & Gas, LLC only | Carthage (Haynesville Shale) | Harrison | 1 | 19 | 1.69M | May 2009 – Apr 2026 |
| State Tract 774-L G-4-97160 | Louisiana Land & Expl. Co., The only | Block 774 (L, C1B Haz) | Mustang IS-LB | 1 | 18 | 1.17M | Jan 1993 – Nov 1995 |
| Block 31 Unit G-10-165879 | OXY USA Inc. only | Block 31 (Queen) | Crane | 1 | 18 | 436K | Oct 1997 – Apr 2024 |
| Oliveira O-4-10917 | Block "T" Petroleum, Inc. only | San Diego SW (Yegua 6490) | Duval | 1 | 17 | 5.31K | Jan 1993 – Oct 1993 |
| Blocker Ware G-6-263848 | Comstock Oil & Gas, LLC only | Carthage (Haynesville Shale) | Harrison | 1 | 17 | 3.22M | May 2010 – Apr 2026 |
| 7211 JV-S Block 16 G-10-59149 | Abraxas Petroleum Corporation only | Block 16 (Devonian) | Ward | 1 | 17 | 457K | Jan 1993 – Feb 2001 |
| Block 59 State 27-11 G-10-232749 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 15 | 217K | Mar 2007 – Apr 2011 |
| Blocker Ranch (Sec. 1043) G-4-92657 | SM Energy Company only | Gold River, North (Olmos) | Webb | 1 | 14 | 20.7K | Nov 1993 – Nov 2012 |
| Block 58 State 31-3 G-10-245061 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 14 | 511K | Feb 2008 – Jun 2013 |
| Block 31 Unit G-10-165872 | Hilcorp Energy Company only | Block 31 (Queen) | Crane | 1 | 12 | 311K | Oct 1997 – Apr 2026 |
| Block 31 Unit G-10-165875 | Hilcorp Energy Company only | Block 31 (Queen) | Crane | 1 | 12 | 1.31M | Oct 1997 – May 2016 |
| Block 71 Unit G-2-135465 | Bay Rock Operating Company only | Clayton (Wilcox 7360) | Live Oak | 1 | 11 | 30.1K | Jan 1993 – May 1994 |
| Texu "R" G-10-78062 | WTG Exploration only | Block 12 (Yates) | Andrews | 1 | 11 | 91.5K | Jan 1993 – Apr 2026 |
| Harris, James Gas Unit G-6-197158 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 10 | 607K | Aug 2003 – Feb 2020 |
| State Tract 335-L G-3-70538 | Fairways Spec. Sales & Serv Inc only | Galveston Block 310-L (Mio) | Brazos-LB | 1 | 10 | 984K | Jan 1993 – Apr 2003 |
| Jenkins a Unit G-6-285700 | Diversified Production LLC only | Blocker (Travis Peak) | Harrison | 1 | 10 | 294 | May 2018 – Mar 2021 |
| Block 31 Unit G-10-165870 | Hilcorp Energy Company only | Block 31 (Queen) | Crane | 1 | 9 | 339K | Oct 1997 – Apr 2026 |
| Block 31 Unit G-10-169035 | OXY USA EOR, LLC only | Block 31 (Queen) | Crane | 1 | 9 | 636K | May 1998 – Apr 2026 |
| University 10-18 "B" G-10-131944 | Texaco E & P Inc. only | Block 18 (Cherry Canyon) | Ward | 1 | 9 | 301K | Jan 1993 – Jul 1995 |
| Harris, James Gas Unit G-6-197437 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 9 | 676K | Aug 2003 – Apr 2026 |
| State Tract 562-L G-2-134145 | Tri-Union Development Corp. only | Matagorda Block 562-L (6000) | Matgrda IS-LB | 1 | 8 | 4.34K | Jan 1999 – Jul 1999 |
| State Lease 774-L G-4-96421 | Louisiana Land & Expl. Co., The only | Block 774 (L) | Mustang IS-LB | 1 | 8 | 9 | Jun 1994 – Jun 1994 |
| Bell, Charlie G-6-285083 | Buffco Production Inc. only | Blocker (Travis Peak) | Harrison | 1 | 8 | 24.3K | Aug 2018 – Jul 2019 |
| Block 31 Unit G-10-202744 | OXY USA Inc. only | Block 31 (Queen) | Crane | 1 | 7 | 438K | May 2004 – Jun 2018 |
| Durelle G-10-202723 | Formentera Operations LLC only | Block 27 (Tubb) | Crane | 1 | 7 | 212K | Dec 2003 – Oct 2018 |
| Blocker Ranch (SEC.1846) G-4-93200 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 6 | 113K | Jan 1993 – Nov 2016 |
| State Tract 659-L NW/4 G-2-157076 | White Marlin Operating Co, LLC only | Matagorda Block 629 (Playa B) | Matgrda IS-LB | 1 | 6 | 88.7K | Nov 1995 – Nov 1996 |
| Blocker Ware G-6-264492 | Comstock Oil & Gas, LLC only | Carthage (Haynesville Shale) | Harrison | 1 | 6 | 2.39M | Oct 2010 – Apr 2026 |
| Block -87- O-1-3194 | Lutex Oil, Ltd. only | Salt Flat | Caldwell | 1 | 6 | 525 | Jan 1993 – Jun 1993 |
| Burchard G-10-224840 | CLR Secondary Recovery, LLC only | Block 72 (Penn.) | Reeves | 1 | 6 | 1.19M | May 2007 – Nov 2023 |
| Block 58 St 40-14 G-10-243000 | COG Operating LLC only | Toyah, NW (Shale) | Reeves | 1 | 6 | 705K | Jan 2008 – Jan 2017 |
| Williams Gas Unit G-6-100728 | Fortune Resources LLC only | Blocker (Cotton Valley) | Harrison | 1 | 5 | 50.9K | Feb 1993 – Mar 2026 |
| Alexander G-10-75046 | Wood, McShane & Thams only | Block a-34 (Yates) | Andrews | 1 | 5 | 44 | Jan 1993 – Jul 1993 |
| U-Tex -E- O-10-16907 | WTG Exploration only | Block 17, Southeast (Delaware) | Ward | 1 | 5 | 0 | Feb 2023 – Feb 2023 |
| State Tract 335-L SW/4 G-3-132554 | Fairways Spec. Sales & Serv Inc only | Brazos Block 336-L (C-54) | Brazos-LB | 1 | 4 | 1.01M | Jan 1993 – Nov 1997 |
| St Tract 245-L (SL 66970) G-3-121421 | Apache Corporation only | Block 245 (5960) | Galveston-LB | 1 | 3 | 59.3K | Jan 1993 – Feb 1993 |
| State Tract 335-L G-3-135222 | Fairways Spec. Sales & Serv Inc only | Brazos Block 335-L (6850) | Brazos-LB | 1 | 2 | 1.63M | Jan 1993 – Nov 1996 |