| State Pacific 55-T2-8X17 G-10-280749 | BPX Operating Company only | Phantom (Wolfcamp) | Loving | 1 | 563K | 1.65M | Feb 2016 – Apr 2026 |
| Brown-Donner Unit A-567 G-6-153267 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 370K | 2.15M | Dec 1994 – Aug 1998 |
| Arco Fee Unit A-121 G-6-151133 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 254K | 2.6M | May 1994 – Mar 2000 |
| Mahlmann-Walther Unit G-3-141715 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 252K | 2.3M | by Jan 1993 – Aug 1999 |
| Pocahontas Unit G-3-161527 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 245K | 929K | Nov 1996 – Aug 1999 |
| Duson G-3-271513 | Transpacific Energy, LLC only | Phase Four (9050 Yegua) | Wharton | 1 | 215K | 4.83M | Nov 2013 – Apr 2026 |
| Terry, H. L. Unit G-3-146621 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 215K | 2.05M | Jul 1993 – Aug 1999 |
| Allen G-3-145818 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 188K | 1.3M | May 1993 – Aug 1999 |
| Franus Unit G-3-156437 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 187K | 2.41M | Sep 1995 – Feb 2000 |
| McCullough-McCullough 'A' G-3-145083 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 187K | 1.49M | by Jan 1993 – Feb 2000 |
| Cannon Unit G-3-155696 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 179K | 1.28M | Jun 1995 – Aug 1999 |
| Jawbreaker Unit G-3-151736 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 174K | 1.3M | Sep 1994 – Aug 1999 |
| Champion Int'l Unit A-1175 G-6-155820 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 159K | 833K | Jul 1995 – Jan 1999 |
| Mueller-Korth Unit G-3-148108 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Lee | 1 | 155K | 751K | Jan 1994 – Aug 1999 |
| Champion a-334 Unit G-6-152455 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 143K | 1.21M | Jul 1994 – Dec 1998 |
| Brazos Coal Ltd.-Terry "B" Unit G-3-146180 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 134K | 915K | Jun 1993 – Aug 1999 |
| Wagnon Unit G-3-153709 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 127K | 966K | Feb 1995 – Aug 1999 |
| Louisiana Pacific Unit No. 1 G-3-205761 | Neches Transport Inc. only | Magilla, West (Woodbine) | Tyler | 1 | 111K | 3.98M | Dec 2004 – Apr 2026 |
| Albrecht G-2-179346 | Transpacific Energy, LLC only | Mission Valley, W.(wilcox 10600) | Goliad | 1 | 100K | 5.89M | Jul 2000 – Apr 2026 |
| Post G-2-200362 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 99.7K | 7.85M | Nov 2003 – Apr 2026 |
| Gibbs Bros. Unit G-6-149857 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 88.2K | 472K | May 1994 – Jan 1999 |
| Arco-Fee a-990 Unit G-6-153675 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 77.7K | 1.04M | Dec 1994 – Aug 1998 |
| Hoelscher, Alice B. G-3-143662 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Burleson | 1 | 67.3K | 723K | by Jan 1993 – May 1996 |
| Bscu USA 27316 G-6-156998 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Sabine | 1 | 65K | 709K | Mar 1995 – Dec 1998 |
| Watz G-3-279161 | Transpacific Energy, LLC only | Phase Four (9050 Yegua) | Wharton | 1 | 64.2K | 680K | Oct 2014 – Apr 2026 |
| Roosevelt Unit G-3-151956 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 61.5K | 671K | May 1994 – Sep 1999 |
| Embesi Unit G-3-174197 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 59.9K | 502K | Jun 1999 – Oct 1999 |
| Pacific a Unit G-13-273122 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 58.8K | 846K | Feb 2011 – Aug 2025 |
| Beaurline G-4-173667 | Northern Pacific Oil Incorporatd only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 51.3K | 978K | Jan 1999 – May 2020 |
| Strong Gas Unit G-2-203413 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 50.7K | 4.6M | May 2004 – Apr 2026 |
| Echols G-4-161410 | Transpacific Energy, LLC only | Hinde (Vicksburg Consolidated) | Starr | 1 | 50.5K | 4.05M | Nov 1996 – Jan 2024 |
| Pacific C Unit G-13-273224 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 47.1K | 729K | Nov 2010 – Feb 2025 |
| Strong Gas Unit G-2-164492 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 44.9K | 4.48M | Aug 1997 – Apr 2026 |
| Pacific a Unit G-13-272962 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 40.8K | 678K | Feb 2011 – Apr 2026 |
| Pacific C Unit G-13-273235 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 39.5K | 769K | Nov 2010 – Apr 2026 |
| McCrary Unit G-3-156476 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 39.1K | 356K | Oct 1995 – Aug 1999 |
| Pacific B Unit G-13-272933 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 38.2K | 820K | Feb 2011 – Apr 2026 |
| Reed Unit G-3-281087 | Transpacific Energy, LLC only | Gresham (9700) | Wharton | 1 | 38.1K | 841K | Oct 2015 – Apr 2026 |
| Yelderman-Bredthauer Unit G-3-142127 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Washington | 1 | 36.7K | 707K | by Jan 1993 – Sep 2000 |
| Warrenton Amarado Unit G-3-147182 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 36.2K | 1.04M | Oct 1993 – Oct 1996 |
| Sisson Gas Unit G-2-229832 | Transpacific Energy, LLC only | Mission Valley, W.(wilcox 10600) | Goliad | 1 | 33.4K | 1.72M | Mar 2007 – Apr 2026 |
| Arco Fee Unit A-15 G-6-163658 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 31.5K | 1.34M | Mar 1997 – Jul 1999 |
| Pacific B Unit G-13-272934 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 31.1K | 768K | Feb 2011 – Apr 2026 |
| Strong Gas Unit G-2-166374 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 31K | 3.51M | Dec 1997 – Apr 2026 |
| Post G-2-187209 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 29K | 4.01M | Jul 2001 – Apr 2026 |
| Dlcc G-3-281408 | Transpacific Energy, LLC only | El Campo (Yegua) | Wharton | 1 | 29K | 393K | Dec 2015 – Mar 2026 |
| Beard, L. Unit G-3-201432 | Transpacific Energy, LLC only | Shanghai, E. (D-5 Yegua) | Wharton | 1 | 28.6K | 501K | Mar 2004 – Oct 2016 |
| Gayle Unit G-2-210529 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 26.3K | 1.52M | Mar 2005 – Apr 2026 |
| Knox, J. W. G-4-188526 | Transpacific Energy, LLC only | Reina (Basal Queen City) | Starr | 1 | 25.1K | 1.04M | Dec 2001 – Apr 2026 |
| Miller Albrecht Unit G-2-3428 | Transpacific Energy, LLC only | Mission Valley, West (Massive-1) | Goliad | 1 | 23.8K | 1.05M | by Jan 1993 – Apr 2026 |