| Mary Swain Harrell G-10-298627 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 361K | 2.38M | Sep 2024 – Apr 2026 |
| Mary Swain Harrell West G-10-299607 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 253K | 1.95M | Mar 2025 – Apr 2026 |
| Mary Swain Harrell G-10-298628 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 210K | 3.43M | Sep 2024 – Apr 2026 |
| Mary Swain Harrell G-10-298626 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 159K | 2.97M | Sep 2024 – Apr 2026 |
| Mary Swain Harrell West G-10-299651 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 138K | 2.67M | Mar 2025 – Apr 2026 |
| Mary Swain Harrell West G-10-299609 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 88.1K | 2.49M | Mar 2025 – Apr 2026 |
| Mary Swain Harrell G-10-299769 | CPX Energy Operating, LLC only | Phantom (Wolfcamp) | Loving | 1 | 73.3K | 1.63M | Mar 2025 – Apr 2026 |
| Harrell "E" G-3-192205 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 1 | 60.7K | 1.4M | Nov 2002 – Apr 2026 |
| Harrell, M. B. G-3-93654 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 1 | 53.2K | 3.64M | Jan 1993 – Apr 2026 |
| Buchanan Gas Unit G-4-203837 | Wagner Oil Company only | Donna (Harrell) | Hidalgo | 1 | 22K | 1.98M | Jun 2004 – Mar 2026 |
| Harrell Gas Unit G-6-223419 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 20.2K | 1.23M | Oct 2006 – Apr 2026 |
| Harrell Gas Unit No. 1 G-6-231388 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 14K | 1.28M | Aug 2007 – May 2022 |
| Harrell Gas Unit No. 2 G-6-230313 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 13.2K | 1.08M | Jun 2007 – Apr 2026 |
| Harrell Gas Unit G-6-222475 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 12.4K | 1.23M | Aug 2006 – Apr 2026 |
| Harrell Gas Unit G-6-226259 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 11.7K | 1.34M | Dec 2006 – Apr 2026 |
| Harrell, Jeanette G-6-252518 | TGNR Panola LLC only | Carthage (Cotton Valley) | Panola | 1 | 11.1K | 2.54M | Apr 2008 – Apr 2026 |
| Harrell Gas Unit No. 2 G-6-245175 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 10.9K | 820K | Jul 2008 – Apr 2026 |
| Harrell Gas Unit G-6-221889 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 10.8K | 889K | May 2006 – Apr 2026 |
| Harrell-Poovey-Black Stone (Allo G-6-282582 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 10.7K | 4.5M | Apr 2017 – Apr 2026 |
| Harrell Gas Unit No. 2 G-6-236135 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.99K | 852K | Nov 2007 – Oct 2024 |
| Harrell Gas Unit No. 2 G-6-222623 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.7K | 737K | Sep 2006 – Oct 2024 |
| Harrell Gas Unit No. 1 G-6-219629 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.66K | 1.15M | Mar 2006 – Apr 2026 |
| Harrell Gas Unit G-6-227745 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.56K | 1.15M | Feb 2007 – Apr 2026 |
| Harrell GU1-Harrell GU2 (Alloc) G-6-282988 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.39K | 3.09M | Apr 2017 – Apr 2026 |
| Buchanan Gas Unit G-4-244490 | Wagner Oil Company only | Donna (Harrell) | Hidalgo | 1 | 9.12K | 378K | Nov 2008 – Apr 2026 |
| Harrell Gas Unit No. 1 G-6-232060 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.86K | 728K | Aug 2007 – Nov 2023 |
| Harrell Gas Unit No. 1 G-6-236442 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.6K | 876K | Oct 2007 – Apr 2026 |
| Harrell Gas Unit No. 2 G-6-229507 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.56K | 723K | Mar 2007 – Sep 2023 |
| Harrell Gas Unit G-6-223517 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.39K | 1.05M | Oct 2006 – Apr 2026 |
| Harrell Gas Unit G-6-218528 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.22K | 831K | Jan 2006 – Apr 2026 |
| Harrell Gas Unit No. 1 G-6-231779 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.02K | 698K | Aug 2007 – Sep 2015 |
| Harrell Gas Unit No. 1 G-6-229689 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 7.97K | 811K | Mar 2007 – Oct 2024 |
| Harrell Gas Unit No. 1 G-6-234428 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 7.53K | 684K | Oct 2007 – Nov 2024 |
| Harrell Gas Unit No. 2 G-6-240438 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 7.19K | 715K | May 2008 – Apr 2026 |
| Harrell Gas Unit No. 2 G-6-232730 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 7.08K | 575K | Sep 2007 – Oct 2024 |
| Harrell Gas Unit No. 2 G-6-232028 | Tanos Exploration II, LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 6.93K | 592K | Sep 2007 – Jun 2017 |
| Wright & Harrell G-8-88133 | Petex only | Eastland County Regular (Gas) | Eastland | 1 | 6.2K | 240K | Jan 1993 – Apr 2026 |
| Harrell Gas Unit No. 1 G-6-231592 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 6.19K | 943K | Aug 2007 – Apr 2026 |
| Harrell Gas Unit No. 1 G-6-282107 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 5.69K | 2.93M | Dec 2016 – Apr 2026 |
| Harrell Gas Unit G-6-221977 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 5.63K | 1.03M | May 2006 – Apr 2026 |
| Harrell Gas Unit No. 1 G-6-223188 | Tanos Exploration II, LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 5.51K | 692K | Oct 2006 – Dec 2017 |
| Swallow Gas Unit G-4-158321 | BP America Production Company only | Donna (Harrell) | Hidalgo | 1 | 5.41K | 280K | Apr 1996 – Nov 2001 |
| Blackstone/Harrell G-6-276825 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 4.7K | 1.93M | Jan 2015 – Apr 2026 |
| Harrell Gas Unit No. 2 G-6-240440 | Tanos Exploration II, LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 4.28K | 447K | Aug 2008 – Nov 2016 |
| Lammers, Maymie, Gas Unit G-4-10140 | Momentum Production Corp. only | Donna (Harrell) | Hidalgo | 1 | 4.03K | 77.8K | Jan 1993 – Sep 2001 |
| Harrell Gas Unit No. 2 G-6-231939 | Tanos Exploration II, LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 3.66K | 380K | Sep 2007 – Sep 2017 |
| Harrell Gas Unit No. 1 G-6-239152 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 3.27K | 315K | May 2008 – Oct 2024 |
| Harrell Gas Unit No. 1 G-6-234363 | Fidelity Explor. & Prod. Co. only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 3.18K | 414K | Dec 2007 – Apr 2012 |
| Harrell Gas Unit G-6-244273 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 2.69K | 551K | Dec 2008 – Apr 2026 |
| Harrell Hod G-13-269737 | TEP Barnett USA, LLC only | Newark, East (Barnett Shale) | Hood | 1 | 2.33K | 256K | Aug 2013 – Aug 2019 |