| 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 – Aug 2026 |
| Harrell Gas Unit G-6-227745 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.56K | 1.15M | Feb 2007 – Aug 2026 |
| Harrell GU1-Harrell GU2 (Alloc) G-6-282988 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 9.53K | 3.14M | Apr 2017 – Aug 2026 |
| Buchanan Gas Unit G-4-244490 | Wagner Oil Company only | Donna (Harrell) | Hidalgo | 1 | 9.12K | 378K | Nov 2008 – Aug 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 – Aug 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 |
| Duggan-Harrell (Congl) Unit O-8-28937 | Petex only | Johnny (Congl.) | Stephens | 1 | 8.48K | 32.4K | Feb 2001 – Nov 2003 |
| Harrell Gas Unit G-6-223517 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.39K | 1.05M | Oct 2006 – Aug 2026 |
| Harrell Gas Unit G-6-218528 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 8.3K | 840K | Jan 2006 – Aug 2026 |
| Harrell Gas Unit No. 1 G-6-231779 | CR2 Energy 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 | 718K | May 2008 – Aug 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 | 6.26K | 242K | by Jan 1993 – Aug 2026 |
| Harrell Gas Unit No. 1 G-6-231592 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 6.19K | 947K | Aug 2007 – Aug 2026 |
| Harrell Gas Unit No. 1 G-6-282107 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 5.69K | 2.97M | Dec 2016 – Aug 2026 |
| Harrell Gas Unit G-6-221977 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 5.63K | 1.03M | May 2006 – Aug 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 |
| Harrell, J. E. O-6-14589 | Tanos Exploration II, LLC only | Minden (Travis Peak Cons.) | Rusk | 1 | 5.34K | 59.4K | Apr 2006 – Apr 2012 |
| Harrell, Sally O-8-9030 | Fairfield Energy Corp. only | Throckmorton County Regular | Throckmorton | 14 | 5.18K | 94 | by Jan 1993 – Oct 2001 |
| Blackstone/Harrell G-6-276825 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 4.73K | 1.94M | Jan 2015 – Aug 2026 |
| Rice, A. R. O-13-24051 | Harrell Operating Inc only | Lac (Conglomerate) | Montague | 1 | 4.48K | 8 | Feb 1993 – Jan 2001 |
| Harrell, P. E. No. 2 Lease O-13-17309 | General Operating Company only | Daves(congl.) | Wichita | 1 | 4.41K | 23 | by Jan 1993 – Apr 2002 |
| 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 |
| Harrell, Annie B. O-8-18448 | Humphrey-Bashford Oil, Inc. only | BMW (King Sand) | Jones | 3 | 4.28K | 48 | by Jan 1993 – Mar 2000 |
| Lammers, Maymie, Gas Unit G-4-10140 | Momentum Production Corp. only | Donna (Harrell) | Hidalgo | 1 | 4.03K | 77.8K | by Jan 1993 – Sep 2001 |
| Harrell, Tabb O-3-18521 | Tabbs Bay Production Company only | Goose Creek | Harris | 1 | 3.91K | 62 | by Jan 1993 – Jan 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 3 (TP) O-6-15572 | Diversified Production LLC only | Minden (Travis Peak Cons.) | Rusk | 2 | 3.44K | 13.1K | Feb 2018 – Aug 2021 |
| Texfel-Harrell O-8-27679 | Smith Pipe of Abilene only | Reb (Marble Falls) | Eastland | 3 | 3.29K | 15.2K | Oct 1995 – Feb 1998 |
| 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 "C" O-3-20064 | Gaither Petroleum Corporation only | Goose Creek | Harris | 1 | 3.04K | 0 | Feb 2001 – Sep 2012 |
| Harrell O-8-29140 | P.R.F. Enterprises, LLC only | Throckmorton County Regular | Throckmorton | 1 | 2.97K | 8.65K | Jun 2002 – Sep 2025 |
| Harrell Gas Unit G-6-244273 | Buckhorn Operating LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 2.69K | 564K | Dec 2008 – Aug 2026 |
| Harrell Estate O-9-863 | Burlington Resources Oil&gas Co. only | McCamey | Upton | 6 | 2.47K | 20 | by Jan 1993 – Dec 1996 |
| Harrell Hod G-13-269737 | TEP Barnett USA, LLC only | Newark, East (Barnett Shale) | Hood | 1 | 2.33K | 256K | Aug 2013 – Aug 2019 |
| Harrell Gas Unit No. 1 G-6-256448 | Diversified Production LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 2.28K | 552K | May 2010 – Oct 2021 |
| Harrell O-11-67626 | Yucca Energy, Inc. only | Camp Springs (Canyon) | Scurry | 1 | 2.27K | 120 | Oct 1996 – Oct 1997 |
| Harrell Gas Unit No. 2 G-6-242898 | Tanos Exploration II, LLC only | Brachfield, S.E. (Cotton Valley) | Rusk | 1 | 2.21K | 288K | Oct 2008 – Jun 2017 |
| Harrell O-10-22181 | Santa FE Energy Resources, Inc. only | Spraberry (Trend Area) | Martin | 1 | 2K | 11.5K | by Jan 1993 – Apr 1995 |
| Harrell, Mary Blackburn Unit G-3-96159 | Anadarko Austin Chalk Company only | Giddings (Austin Chalk, Gas) | Lee | 1 | 1.96K | 119K | by Jan 1993 – Feb 1996 |
| Harrell Gas Unit N0. 2 O-6-15538 | Diversified Production LLC only | Oak Hill (Travis Peak) | Rusk | 1 | 1.71K | 31.9K | Dec 2016 – Feb 2018 |
| Harrell, M. O-13-16325 | Fidelity Energy Co. only | Cooke County Regular | Cooke | 1 | 1.68K | 20 | by Jan 1993 – Oct 2002 |
| Phoenix Gas Unit G-4-206635 | Wagner Oil Company only | Donna (Harrell) | Hidalgo | 1 | 1.67K | 206K | Dec 2004 – Jan 2022 |