| D.C.R.C. O-4-8256 | Kebo Oil & Gas, Inc. only | Charamousca (Wilcox 5400, E.) | Duval | 2 | 51.2K | 2.72K | by Jan 1993 – Jun 1997 |
| Worden & Drought O-4-8517 | Firstrike Energy Corporation only | Charamousca (Wilcox 2-a, FB-B) | Duval | 1 | 51.2K | 7.9K | by Jan 1993 – Jan 2016 |
| Ramirez, Jose O-4-11577 | Three C Exploration, LLC only | El Mesquite (5200) | Duval | 3 | 51.1K | 548K | by Jan 1993 – Dec 2023 |
| D..c.r.c. O-4-12679 | Sanchez Basin Resources LLC only | Charamousca (Wilcox 5400, E.) | Duval | 2 | 51K | 90 | Jul 1997 – Jan 2026 |
| Shovlin Vehle G-4-247883 | Wadi Petroleum, Inc. only | Herbst-Wilcox (Torel) | Duval | 1 | 51K | 3.11M | Mar 2009 – Dec 2013 |
| Duval State 54 O-4-4867 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 4 | 50.7K | 25 | by Jan 1993 – Aug 2026 |
| Driscoll Foundation "B" O-4-11979 | Vision Oil and Gas LLC only | Bennett Ranch (3RD Cook Mtn.) | Duval | 3 | 50.5K | 12K | by Jan 1993 – Aug 2026 |
| Hahl, C. W., Sec. 67 O-4-1559 | Hilcorp Energy Company only | Loma Novia | Duval | 4 | 50.5K | 111 | by Jan 1993 – Apr 2026 |
| Peters Estate O-4-12352 | Solo Oil & Gas Company LLC only | Rancho Solo | Duval | 4 | 50.4K | 113 | Apr 1994 – Aug 2026 |
| Carrl O-4-10968 | L.T.D. Explorations Inc. only | Carrl Ranch | Duval | 1 | 50.3K | 16 | by Jan 1993 – Aug 2026 |
| Moffett, L.P. Estate O-4-12151 | 3D Oil Company, LLC only | Lil Miss (Pettus) | Duval | 1 | 49.1K | 64.4K | by Jan 1993 – Aug 2022 |
| Foster, J. R. -B- O-4-1184 | Hilcorp Energy Company only | Hagist Ranch ( Queen City Sand) | Duval | 1 | 48.6K | 148K | by Jan 1993 – Sep 2017 |
| Wernecke, E. D. G-4-165277 | NI Energy LLC only | Rosita (Wilcox P) | Duval | 1 | 48.3K | 4.14M | Oct 1997 – Mar 2023 |
| Miller West O-4-14051 | Kebo Oil & Gas, Inc. only | Benavides (Pettus) | Duval | 2 | 48.2K | 0 | Jul 2017 – Aug 2026 |
| DCR-State 64A O-4-12236 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 3 | 47.9K | 427 | Aug 1993 – Jun 2014 |
| Dcrc -a- NCT-2 O-4-9175 | Hilcorp Energy Company only | Hagist Ranch ( Argo) | Duval | 11 | 47.2K | 19 | by Jan 1993 – Aug 2026 |
| Tinney Estate O-4-8759 | Chapco, Inc. only | Piedras Pintas Dome | Duval | 5 | 46.4K | 6 | Apr 1993 – Jan 2026 |
| Exxon-Yates Ranch Fee "D" G-4-145446 | Exxon Corp. only | Bold Forbes (9550) | Duval | 1 | 46.1K | 3.1M | Apr 1993 – Sep 1996 |
| Wiederkehr, L. O-4-7754 | Black Gold Operating Co, LLC only | Govt. Wells, N. (1800, W.) | Duval | 2 | 45.9K | 68.1K | by Jan 1993 – Sep 2020 |
| Canales G-4-203077 | Finaly Resources LLC only | Blanchard (Queen City) | Duval | 1 | 45.8K | 2.1M | Aug 2004 – Jul 2025 |
| Killam Mineral Fee Sect. 132 "A" O-4-12495 | Killam Oil Co., Ltd. only | Cedro Hill | Duval | 10 | 45.7K | 0 | Sep 1997 – Aug 2026 |
| Frost Bank G-4-212586 | Finaly Resources LLC only | Lopez, SE. (Consolidated) | Duval | 1 | 45K | 2.21M | Aug 2005 – Aug 2026 |
| Cantu Oil Unit O-4-13067 | Remora Operating, LLC only | Seven Sisters, E. (Loma Novia) | Duval | 2 | 44.7K | 83.2K | Jan 2002 – Apr 2017 |
| Duval County Ranch Co.-K- O-4-6927 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 4) | Duval | 2 | 44.6K | 51.6K | by Jan 1993 – Aug 2018 |
| Parr, E. A. O-4-337 | Bridwell Oil Co. only | Bridwell | Duval | 5 | 44.6K | 9K | by Jan 1993 – Dec 2002 |
| Duval County Ranch Co. State "V" O-4-9932 | Killam Oil Co., Ltd. only | Lundell (Mirando No. 1) | Duval | 3 | 44.2K | 3.58K | by Jan 1993 – Aug 2026 |
| Govt. Wells, N. (1800 Aw&bw)unit O-4-8983 | Black Gold Operating Co, LLC only | Govt. Wells, N. (1800A,W) | Duval | 13 | 44K | 62K | by Jan 1993 – Jul 2026 |
| Martin, R. S. -D- O-4-10410 | Hilcorp Energy Company only | Casa Blanca | Duval | 3 | 44K | 111 | by Jan 1993 – Aug 2026 |
| Duval County Ranch Co. -D- O-4-1098 | Hilcorp Energy Company only | Govt. Wells, N. | Duval | 2 | 43.3K | 21 | by Jan 1993 – Aug 2026 |
| D. C. R. C. O-4-8070 | Los Hijos de Sanchez J LLC only | Charamousca (Wilcox 5400) | Duval | 1 | 43K | 5.98K | by Jan 1993 – Dec 2021 |
| Ruiz State G-4-168924 | Killam Oil Co., Ltd. only | Rich Hurt (Wx. 4TH Hinnant) | Duval | 1 | 42.9K | 6.35M | Apr 1998 – Jun 2018 |
| Tinney -A- O-4-5279 | Chapco, Inc. only | Piedras Pintas Dome | Duval | 3 | 42K | 9 | by Jan 1993 – Jan 2026 |
| Marchbanks-Cadena Gas Unit #1 G-4-215945 | Crossroads Petroleum L.L.C. only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 41.9K | 605K | Jan 2006 – Nov 2021 |
| Duval Ranch Section 281 O-4-8183 | McGowan Working Partners, Inc. only | Charamousca, South | Duval | 1 | 41.9K | 14.7K | by Jan 1993 – Sep 2004 |
| Welder Heirs G-4-144943 | Hurd Enterprises, Ltd. only | Bold Forbes (9800) | Duval | 1 | 41.9K | 580K | Feb 1993 – Jul 2001 |
| Dinn Mineral Trust O-4-13803 | Aurora Resources Corporation only | Orlee | Duval | 4 | 41.7K | 0 | Aug 2013 – Dec 2024 |
| Garcia, F. et Al O-4-11498 | Prime Operating Company only | El Mesquite (5200) | Duval | 6 | 41.3K | 231K | by Jan 1993 – Mar 2011 |
| Rogers, Herminia G. O-4-11307 | 3D Oil Company, LLC only | Lil Miss (Hockley 3900) | Duval | 1 | 41.2K | 20.3K | by Jan 1993 – May 2025 |
| Duval-State 54 O-4-4568 | Hilcorp Energy Company only | Govt. Wells, N. (1740 Sand) | Duval | 3 | 41.2K | 25 | by Jan 1993 – May 2025 |
| Saenz -C- O-4-4122 | L.T.D. Explorations Inc. only | Jaboncillos Creek (Frio) | Duval | 2 | 40.9K | 144 | by Jan 1993 – Apr 2005 |
| Alta-Vanco O-4-13320 | Tepee Petroleum Co., Inc. only | Tesoro (5000 Pettus) | Duval | 1 | 40.4K | 22.3K | Jul 2005 – Jul 2007 |
| Hernandez A O-4-12680 | Price Drilling & Exploration Co. only | Orcones (5200-Oil) | Duval | 1 | 40.2K | 10.6K | Jun 1997 – Dec 2005 |
| Marchbanks O-4-14124 | Awp Operating Company only | Tesoro (Cole Upper 3640) | Duval | 1 | 40.2K | 0 | Jul 2019 – Jul 2026 |
| DCR-State 64-8 Oil Unit O-4-12220 | Killam Oil Co., Ltd. only | Govt. Wells, N. | Duval | 1 | 40.1K | 1.17K | Jul 1993 – Aug 2026 |
| Mag.duval Ranch Sec. 208-209 O-4-9194 | Killam Oil Co., Ltd. only | Govt. Wells, N. (1150) | Duval | 1 | 39.9K | 21 | by Jan 1993 – Aug 2026 |
| Parr O-4-12922 | Tidal Petroleum, Inc. only | Thomas Lockhart | Duval | 2 | 39.2K | 8.67K | Mar 2000 – Feb 2010 |
| Dcrc MF NCT-32 O-4-5536 | Hilcorp Energy Company only | Petrox, N. (Frio 1250) | Duval | 6 | 39.1K | 111 | by Jan 1993 – Jul 2026 |
| Perez, Rodolfo et Al O-4-11692 | Prime Operating Company only | El Mesquite (5200) | Duval | 1 | 39.1K | 235K | by Jan 1993 – Feb 2007 |
| Herbst, F. G-4-233667 | Hurd Enterprises, Ltd. only | Herbst-Wilcox (Torel) | Duval | 1 | 38.8K | 1.58M | Dec 2007 – Aug 2015 |
| Welder -A- O-4-11121 | D & B Energy Corporation only | Squire | Duval | 3 | 38.5K | 45.2K | by Jan 1993 – Aug 2002 |