| Duval County Ranch 578 G-4-293547 | Killam Oil Co., Ltd. only | Rich Hurt (Wx. Luling) | Duval | 1 | 15.3K | 450K | Jul 2022 – Jun 2025 |
| Duval County Ranch Company 4 G-4-241710 | Remora Operating, LLC only | Petrox (Lower Wilcox Cons.) | Duval | 1 | 11.1K | 1.04M | Jun 2008 – Aug 2026 |
| Duval County Ranch Co. G-4-101202 | Jenco Petroleum Corporation only | Lopez, NW (Wilcox) | Duval | 1 | 10.2K | 757K | by Jan 1993 – Sep 2014 |
| Duval County Ranch Co. -K- G-4-146160 | Southwestern Energy Prod. Co. only | Charamousca, W. (Wilcox 2 Seg C) | Duval | 1 | 2.59K | 315K | Mar 1993 – Feb 1998 |
| Duval County Ranch Co.'k' G-4-144189 | Texas Petroleum Investment Co. only | Charamousca, W.(wilcox 2) | Duval | 1 | 1.8K | 873K | by Jan 1993 – May 1995 |
| Duval County Ranch Co. -K- G-4-149494 | Texas Petroleum Investment Co. only | Charamousca, W.(wilcox 2) | Duval | 1 | 884 | 418K | Apr 1994 – May 1998 |
| Duval County Ranch Co. -K- G-4-146159 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 2 Seg C) | Duval | 1 | 639 | 77.5K | Mar 1993 – Feb 1996 |
| Duval County Ranch Co. -K- G-4-148266 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 1, C) | Duval | 1 | 470 | 273K | Jan 1994 – May 2016 |
| Duval County Ranch Co. "K" G-4-144562 | Texas Petroleum Investment Co. only | Charamousca, W.(wilcox 2) | Duval | 1 | 455 | 210K | Feb 1993 – Aug 1993 |
| Duval County Ranch Co. -K- G-4-150241 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 3) | Duval | 1 | 442 | 84.6K | May 1994 – Jul 2000 |
| Duval County Ranch Co. "E" G-4-153686 | Exxon Corp. only | Piedre Lumbre (Wilcox) | Duval | 1 | 223 | 21K | Jan 1995 – May 1996 |
| Duval County Ranch Co. "E" G-4-153694 | Exxon Corp. only | Piedre Lumbre (Wilcox) | Duval | 1 | 217 | 12.6K | Feb 1995 – May 1996 |
| Duval County Ranch Co. -K- G-4-150094 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 2 Seg C) | Duval | 1 | 185 | 89.3K | Jun 1994 – Nov 1994 |
| Duval County Ranch Co. -K- G-4-147292 | Exxon Corp. only | Charamousca, West (2200 Massive) | Duval | 1 | 143 | 51.7K | Nov 1993 – Apr 1994 |
| Duval County Ranch Co. "K" G-4-143307 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 2 Seg C) | Duval | 1 | 68 | 505K | by Jan 1993 – May 2026 |
| Duval County Ranch Co. -K- G-4-174106 | Texas Petroleum Investment Co. only | Charamousca, West (Jackson) | Duval | 1 | 3 | 51.2K | Jul 1999 – Jul 2015 |
| Duval County Ranch Co. "K" G-4-145123 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 2 Seg C) | Duval | 1 | 1 | 2.08M | Feb 1993 – Jun 2007 |
| Duval County Ranch Company G-4-99143 | Cusack, Michael F. only | Dude (Lower Cole) | Duval | 1 | 0 | 54.5K | by Jan 1993 – Jul 1994 |
| Dcrc Sec. 49 "M" G-4-102284 | Duval County Ranch Co. only | Colmena (Cole 1500) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Company G-4-105236 | Jenco Petroleum Corporation only | Lopez,nw (1470 Jackson) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Company G-4-106452 | Cusack, Michael F. only | Dude (Upper Cole) | Duval | 1 | 0 | 1.46K | by Jan 1993 – Jul 1994 |
| Duval County Ranch Co. G-4-128139 | Cusack, Michael F. only | Dude (Upper Cole) | Duval | 1 | 0 | 2.96K | by Jan 1993 – Jul 1994 |
| Duval County Ranch Co. "K" G-4-128625 | Exxon Corp. only | Charamousca, W. (Wilcox 1, C) | Duval | 1 | 0 | 3.85K | Jun 1993 – Jan 1994 |
| Duval County Ranch Co. G-4-132502 | Speed, F. Michael, Trustee only | Selby (Catahoula 500) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co. -K- G-4-167594 | Southwestern Energy Prod. Co. only | Charamousca, West (1900) | Duval | 1 | 0 | 8.3K | Mar 1998 – Nov 1998 |
| Duval County Ranch Co. "K" G-4-168420 | Southwestern Energy Prod. Co. only | Charamousca, W.(stringer-1700) | Duval | 1 | 0 | 13.2K | May 1998 – Jun 2000 |
| Duval County Ranch G-4-208495 | Devon Energy Production Co, L.P. only | Seventy-Six, West | Duval | 1 | 0 | 0 | — |
| Duval County Ranch 578 G-4-293146 | Killam Oil Co., Ltd. only | Rich Hurt (Wx. Guerra) | Duval | 1 | 0 | 35.1K | Apr 2022 – Jul 2022 |
| Duval County Ranch Co. "K" G-4-138372 | Texas Petroleum Investment Co. only | Charamousca, West (2200 Massive) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch G-4-9993 | Duval County Ranch Co. only | Colmena (Cole 1500) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co. -K- G-4-176014 | Texas Petroleum Investment Co. only | Charamousca, West (Jackson) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch -K- G-4-180467 | Texas Petroleum Investment Co. only | Charamousca, West (Jackson) | Duval | 1 | 0 | 25.8K | Dec 2000 – May 2026 |
| Duval County Ranch Co., -K- G-4-9854 | Texas Petroleum Investment Co. only | Charamousca, West (2200) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co. -K- G-4-151055 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 1, C) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co. G-4-10630 | Hilcorp Energy Company only | Government Wells, N. ( Wilcox) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co., -G- G-4-35381 | Caribbean Energy LLC II only | Cedro Hill (1400) | Duval | 1 | 0 | 1.08K | Oct 1995 – Jun 2001 |
| Duval County Ranch Co. -K- G-4-173764 | Texas Petroleum Investment Co. only | Charamousca, West (Jackson) | Duval | 1 | 0 | 84.6K | Apr 1999 – May 2026 |
| Duval County Ranch Co -K- G-4-175357 | Texas Petroleum Investment Co. only | Charamousca, West (Jackson) | Duval | 1 | 0 | 13.5K | Nov 1999 – Oct 2000 |
| Duval County Ranch Co. "K" G-4-133951 | Texas Petroleum Investment Co. only | Charamousca, West (2200) | Duval | 1 | 0 | 83.6K | by Jan 1993 – Aug 1994 |
| Duval County Ranch Co. -J- G-4-151906 | Mountain V Texas, LLC only | Government Wells, N. ( Wilcox) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co. -K- G-4-155474 | Texas Petroleum Investment Co. only | Charamousca, W. (Wilcox 2 Seg C) | Duval | 1 | 0 | 162K | Aug 1995 – Aug 1999 |
| Duval County Ranch Co. -K- G-4-167591 | Texas Petroleum Investment Co. only | Charamousca, West (2200) | Duval | 1 | 0 | 114K | Mar 1998 – May 2026 |
| Humble Duval Ranch Sec. 262 G-4-10098 | Duval County Ranch Co. only | D C R-79 | Duval | 1 | 0 | 0 | — |
| Duval-State 76 G-4-14202 | Duval County Ranch Co. only | Seventy-Six, South (1300) | Duval | 1 | 0 | 0 | — |
| DCR Sec 80 G-4-51604 | Duval County Ranch Co. only | Seventy-Six, South ( 870) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch Co. G-4-52736 | Energy Gathering, Inc. only | Charamousca, North (Rosenberg) | Duval | 1 | 0 | 0 | — |
| Dcrc Section 204 Fee G-4-57468 | Duval County Ranch Co. only | Petrox (Wilcox 7100) | Duval | 1 | 0 | 0 | — |
| Duval County Ranch CO.1-J G-4-57643 | Breck Operating Corp. only | Gormac (Hockley) | Duval | 1 | 0 | 0 | — |
| D. C. R. Co. Sec. 204 Fee G-4-59847 | Duval County Ranch Co. only | Petrox (Wilcox 7100) | Duval | 1 | 0 | 0 | — |
| Dcrc Section 204 Fee G-4-60358 | Duval County Ranch Co. only | Petrox (Frio) | Duval | 1 | 0 | 0 | — |