| Chapman-Franke-Murphy-Kotara SA G-2-296162 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Karnes | 1 | 351K | 929K | Feb 2023 – Apr 2026 |
| Tipi Chapman 34-163 G-10-299993 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 1 | 299K | 570K | Dec 2013 – Apr 2026 |
| Tipi Chapman 34-163 G-10-299862 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 1 | 298K | 778K | Aug 2013 – Apr 2026 |
| Tipi Chapman 34-163 G-10-299860 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 1 | 273K | 533K | Aug 2013 – Apr 2026 |
| Chapman G-3-187847 | Strand Energy, L.C. only | Chapman (Wilcox 9890) | Waller | 1 | 209K | 3.37M | Feb 2002 – Jan 2010 |
| Chapman Ranch G-4-190455 | Proline Energy Resources Inc only | Mobil-David (Anderson) | Nueces | 1 | 202K | 3.79M | Jul 2002 – Dec 2010 |
| Chapman Ranch C G-4-259450 | Proline Energy Resources Inc only | Mobil-David (Anderson) | Nueces | 1 | 191K | 11.8M | Feb 2011 – Feb 2020 |
| Chapman "A" G-3-199228 | Somerset Operating, LLC only | Chapman (Wilcox 9890) | Waller | 1 | 185K | 3.5M | Jan 2004 – Sep 2017 |
| Chapman Rogers-Franke SA G-2-296599 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Karnes | 1 | 159K | 380K | Feb 2023 – Jan 2026 |
| Chapman Ranch G-4-214728 | Urban Oil & Gas Group, LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 134K | 6.15M | Aug 2005 – Apr 2010 |
| H. T. Chapman 04 G-2-267247 | Crescent Energy Operating, LLC only | Sugarkane (Eagle Ford) | Live Oak | 1 | 128K | 257K | Aug 2011 – Oct 2024 |
| Chapman Ranch "A" G-4-227943 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 123K | 1.66M | Feb 2007 – Sep 2025 |
| Chapman Ranch G-4-201649 | Apache Corporation only | Chapman Ranch (Upper Frio Cons.) | Nueces | 1 | 79.1K | 888K | Apr 2004 – Dec 2010 |
| Chapman Rothe Unit G-1-289607 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 78.3K | 150K | Nov 2011 – Mar 2019 |
| Chapman G-4-194035 | Ventex Operating Corp. only | Arnold-David, North (L. Anderson | Nueces | 1 | 67K | 8.07M | Feb 2003 – Oct 2012 |
| Chapman, J.O. 38 G-4-164385 | Decker Operating Co., L.L.C. only | Mobil-David, W. (Howell Hight) | Nueces | 1 | 64.2K | 972K | May 1997 – Nov 2009 |
| Chapman Ranch G-4-232247 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 59.1K | 1.47M | Jul 2007 – Apr 2012 |
| Chapman Ranch G-4-235046 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 56.4K | 849K | Feb 2008 – Mar 2026 |
| Chapman G-4-196378 | Western Gulf Oil & Gas, LLC only | Mobil-David (Anderson) | Nueces | 1 | 55.4K | 3.73M | Jun 2003 – Nov 2018 |
| Chapman, J. O. G-4-217866 | Decker Operating Co., L.L.C. only | Mobil-David (Frio 12,600) | Nueces | 1 | 54K | 283K | Dec 2005 – Oct 2016 |
| Chapman G-4-249353 | Ventex Operating Corp. only | Chapman Ranch (Upper Frio Cons.) | Nueces | 1 | 51.9K | 68.8K | Feb 2009 – Sep 2024 |
| Chapman G-4-188010 | Ventex Operating Corp. only | Arnold-David, North (Laureles) | Nueces | 1 | 50.1K | 5.64M | Jan 2002 – Mar 2016 |
| Chapman Cowles G-4-198403 | Ventex Operating Corp. only | Arnold-David, North (Frio,lower) | Nueces | 1 | 43.5K | 3.09M | Dec 2003 – Jun 2009 |
| May-Chapman G-1-289419 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 42.5K | 48.7K | Jun 2018 – Apr 2026 |
| Chapman Ranch G-4-225042 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 42.1K | 1.42M | Jan 2007 – Feb 2026 |
| Chapman Ranch C G-4-219755 | Apache Corporation only | Mobil-David (Frio 12,600) | Nueces | 1 | 40.1K | 1.84M | May 2006 – May 2011 |
| Chapman Ranch G-4-266597 | Apache Corporation only | Mobil-David (Anderson) | Nueces | 1 | 37.3K | 741K | Jun 2012 – Oct 2012 |
| Chapman Ranch C G-4-262707 | Apache Corporation only | Mobil-David (Anderson) | Nueces | 1 | 35.9K | 2.07M | Sep 2011 – Feb 2012 |
| Crook-Chapman 49 G-4-269642 | Apache Corporation only | Mobil-David (Anderson) | Nueces | 1 | 31.8K | 483K | Mar 2013 – Jul 2013 |
| Chapman Ranch G-4-213210 | Apache Corporation only | Mobil-David (Frio 12,600) | Nueces | 1 | 31.6K | 1.22M | Jun 2005 – Dec 2010 |
| Chapman G-4-194234 | Ventex Operating Corp. only | Arnold-David (Anomalina) | Nueces | 1 | 27.1K | 1.72M | Jul 2003 – Jul 2012 |
| J. G. Chapman 'B' Gas Unit (SA) G-6-275730 | Merit Energy Company only | Woodlawn (Cotton Valley) | Harrison | 1 | 25.5K | 4.04M | Jan 2014 – Apr 2026 |
| Chapman Ranch G-4-209197 | Urban Oil & Gas Group, LLC only | Mobil-David (Howell Hight) | Nueces | 1 | 25K | 487K | Mar 2005 – Dec 2010 |
| Chapman, James E. et Al G-3-133334 | Seagull Energy E&P Inc. only | San Leon (11250 Sd.) | Galveston | 1 | 23.8K | 453K | by Jan 1993 – Dec 1997 |
| Chapman Ranch G-4-209814 | Apache Corporation only | Mobil-David (Frio 12,600) | Nueces | 1 | 23.7K | 1.01M | Apr 2005 – Dec 2010 |
| Chapman, J.G. "B" Gas Unit G-6-173299 | Merit Energy Company only | Woodlawn (Cotton Valley) | Harrison | 1 | 23.6K | 1.7M | Jan 1999 – Jan 2010 |
| Chapman Ranch G-4-207096 | Urban Oil & Gas Group, LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 22.5K | 1.77M | Aug 2004 – May 2016 |
| Chapman G-3-193826 | Strand Energy, L.C. only | Howth (Wilcox 7580) | Waller | 1 | 20.3K | 542K | Mar 2003 – Mar 2009 |
| Chapman Ranch G-4-208731 | Apache Corporation only | Mobil-David (Frio 12,600) | Nueces | 1 | 18.5K | 1.77M | Oct 2004 – Dec 2010 |
| J. E. Chapman et Al G-3-171405 | Chaparral Energy, L.L.C. only | San Leon (11250 Sd.) | Galveston | 1 | 18.3K | 471K | Nov 1998 – Nov 2004 |
| Chapman Ranch "B" G-4-199951 | Decker Operating Co., L.L.C. only | Chapman Ranch (9650) | Nueces | 1 | 16.9K | 1.22M | Nov 2003 – Mar 2016 |
| Ford Chapman Unit G-10-245789 | Diamondback E&P LLC only | Moore-Hooper (Wlfcmp\penn Cons) | Loving | 1 | 15.1K | 3.98M | May 2007 – Oct 2023 |
| Chapman, J.O. G-4-164942 | Decker Operating Co., L.L.C. only | Mobil-David, SW. (Howell Hight) | Nueces | 1 | 14.9K | 1.62M | May 1997 – Dec 2012 |
| Chapman Ranch G-4-197910 | Proline Energy Resources Inc only | Mobil-David (Anderson) | Nueces | 1 | 14.5K | 346K | May 2003 – Dec 2003 |
| Chapman Ranch G-4-231911 | Proline Energy Resources Inc only | Mobil-David (Frio 12,600) | Nueces | 1 | 14.3K | 869K | Aug 2007 – Aug 2019 |
| Chapman G-4-210014 | Ventex Operating Corp. only | Arnold-David, North (Laureles) | Nueces | 1 | 13.6K | 603K | May 2005 – Sep 2014 |
| Chapman Unit No. 1 G-4-177881 | Omega Energy, LLC only | Mobil-David (Anderson) | Nueces | 1 | 13.3K | 506K | Jun 2000 – Jul 2002 |
| Chapman Ranch G-4-215831 | Urban Oil & Gas Group, LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 12.5K | 235K | Jan 2006 – Dec 2010 |
| Chapman G-4-195886 | Ventex Operating Corp. only | Arnold-David, North (Frio,lower) | Nueces | 1 | 12.1K | 842K | Jul 2003 – Jul 2005 |
| Chapman, J.G. "B" Gas Unit G-6-179551 | Merit Energy Company only | Woodlawn (Cotton Valley) | Harrison | 1 | 11.2K | 444K | Feb 2000 – Dec 2012 |