| Spencer, Olivia Gas Unit G-9-18866 | Incline Energy only | Eldorado, Southwest (Strawn) | Schleicher | 1 | 39.3K | 5.26M | Jan 1993 – Dec 2020 |
| Spencer "29" G-9-211669 | BCP Resources, LLC only | Blue Danube (Devonian) | Upton | 1 | 22.2K | 1.14M | Apr 2005 – Sep 2019 |
| Spencer Gas Unit #1 G-6-99237 | McBee Operating Company, L.L.C. only | Rosewood (Cotton Valley) | Upshur | 1 | 17.8K | 834K | Jan 1993 – Apr 2026 |
| Spencer Gas Unit G-6-229747 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 15.4K | 593K | Oct 2007 – May 2019 |
| Spence, Ralph G-5-153785 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 14.8K | 4.33M | Feb 1995 – Apr 2026 |
| Spencer Gas Unit #1 G-6-244441 | McBee Operating Company, L.L.C. only | Rosewood (Cotton Valley) | Upshur | 1 | 13.9K | 616K | Sep 2008 – Apr 2026 |
| Spencer Gas Unit #1 G-6-83982 | McBee Operating Company, L.L.C. only | Rosewood (Cotton Valley) | Upshur | 1 | 13.7K | 1.2M | Jan 1993 – Apr 2026 |
| Drabek-Hale G-2-209291 | Dynamic Production, Inc. only | Spencer Jack (Wilcox, Lower) | Lavaca | 1 | 11.5K | 348K | Oct 2004 – Sep 2009 |
| Spencer Gas Unit G-6-234349 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 11.4K | 528K | Oct 2007 – Mar 2026 |
| Lohr, Bob G-5-130547 | Spence, Ralph Oil Company, Inc. only | Martins Mill (Lohr) | Van Zandt | 1 | 10.3K | 298K | Jan 1993 – Sep 1998 |
| Spencer Gas Unit G-6-234350 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 9.43K | 500K | Oct 2007 – May 2024 |
| Spencer Gas Unit #1 G-6-241885 | McBee Operating Company, L.L.C. only | Rosewood (Cotton Valley) | Upshur | 1 | 8.94K | 528K | Aug 2008 – Apr 2026 |
| Chandler G-5-101209 | Spence, Ralph Oil Company, Inc. only | Martins Mill (Rodessa 8250) | Van Zandt | 1 | 8.79K | 340K | Feb 1993 – Sep 2015 |
| Spence, Ralph G-5-145082 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 7.89K | 2.14M | Mar 1993 – Apr 2026 |
| Spencer Gas Unit #1 G-6-243952 | McBee Operating Company, L.L.C. only | Rosewood (Cotton Valley) | Upshur | 1 | 6.88K | 474K | Sep 2008 – Apr 2026 |
| Taylor, W. E. G-5-41655 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa) | Limestone | 1 | 6.09K | 529K | Jul 1995 – Mar 2015 |
| Spencer, Annie G-9-18772 | XTO Energy Inc. only | Brown-Bassett (Ellenburger) | Terrell | 1 | 5.31K | 10.3M | Jan 1993 – Apr 2020 |
| Chandler G-5-244316 | Spence, Ralph Oil Company, Inc. only | Martins Mill (Rodessa 8170) | Van Zandt | 1 | 4.91K | 227K | Jun 2008 – Jun 2015 |
| Spence, Ralph G-5-183296 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 4.65K | 799K | May 2001 – Apr 2026 |
| Spencer Gas Unit G-6-242134 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 3.98K | 319K | Aug 2008 – Apr 2026 |
| Spence, Ralph G-5-162828 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 3.81K | 1.99M | Feb 1997 – Apr 2026 |
| Spence, Ralph G-5-181074 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 3.76K | 1.02M | Dec 2000 – Apr 2026 |
| Spencer Gas Unit G-6-242133 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 2.96K | 309K | Aug 2008 – May 2024 |
| Spence, Ralph G-5-108642 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 2.36K | 784K | Jan 1993 – Apr 2026 |
| Spencer Gas Unit G-6-241864 | Brookston Energy, Inc. only | Waskom (Travis Peak 6385 Sand) | Harrison | 1 | 2.09K | 794K | Oct 2007 – May 2024 |
| Johnson G-5-103628 | Spence, Ralph Oil Company, Inc. only | Martins Mill (Rodessa) | Van Zandt | 1 | 2.01K | 291K | Jan 1993 – Oct 2003 |
| Lenamond G-5-43961 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa) | Limestone | 1 | 1.85K | 147K | Jan 1993 – Aug 1999 |
| Spencer Kent Crane G-4-248558 | Wallis Energy, Inc. only | Fulton Beach (B-3-8) | Aransas | 1 | 1.83K | 421K | Dec 2008 – Apr 2026 |
| Slaughter, N. G-5-43046 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa) | Limestone | 1 | 1.83K | 107K | Jan 1993 – Jan 1999 |
| Spencer Gas Unit G-6-243194 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.75K | 95.2K | Aug 2008 – Feb 2026 |
| Spencer-Kent-Crane Unit 1 0 G-4-47065 | Omega Energy Corp. only | Fulton Beach (B-3-8) | Aransas | 1 | 1.39K | 363K | Sep 2002 – Jul 2008 |
| George, Kenneth G-8-201674 | Spence Energy Company only | Putnam, N. (Caddo 3250) | Callahan | 1 | 1.35K | 20.8K | May 2004 – Feb 2011 |
| Spencer, Annie G-9-153476 | XTO Energy Inc. only | Brown-Bassett (Wolfcamp) | Terrell | 1 | 1.34K | 1.63M | Feb 1995 – Apr 2020 |
| Spencer, R. G-6-133062 | Phillips, Jack L. Co. only | Bethany (Pettit 6170) | Harrison | 1 | 1.21K | 21.9K | Jan 1993 – Oct 1996 |
| Wild Turkey G-5-144821 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa) | Limestone | 1 | 1.18K | 282K | Jan 1993 – Mar 2015 |
| Huckabay, H. P. G-5-92514 | Spence, Ralph Oil Company, Inc. only | Martins Mill (Rodessa) | Van Zandt | 1 | 1.14K | 175K | Apr 1993 – Sep 2015 |
| Favors, C. C. "B" G-5-203593 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa B) | Limestone | 1 | 1.05K | 315K | Jun 2004 – Feb 2023 |
| Huckabay, H. P. G-5-171635 | Spence, Ralph Oil Company, Inc. only | Ash, North (James Lime) | Van Zandt | 1 | 768 | 76.3K | Dec 1997 – Apr 2005 |
| Kurth, E. L. G-5-41654 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa) | Limestone | 1 | 698 | 25.8K | Jan 1993 – Apr 1995 |
| Spencer 174 G-9-166271 | Dreyfus, Louis Natural Gas Corp only | Sawyer (Canyon) | Schleicher | 1 | 546 | 10.5K | Nov 1997 – Feb 2000 |
| Tompkins-Spencer G-6-198866 | TGNR Panola LLC only | Carthage (Cotton Valley) | Panola | 1 | 538 | 622K | Nov 2003 – Apr 2026 |
| Reynolds, T.E. Family G-5-122151 | Spence, Ralph Oil Company, Inc. only | Ivanhoe, West (Rodessa) | Limestone | 1 | 534 | 31.5K | Jan 1993 – May 1994 |
| Tompkins-Spencer G-6-142011 | TGNR Panola LLC only | Carthage (Cotton Valley) | Panola | 1 | 526 | 1.46M | Jan 1993 – Apr 2026 |
| Favors, C. C. "B" G-5-197849 | Spence, Ralph Oil Company, Inc. only | Pokey (Travis Peak Lower 1) | Limestone | 1 | 515 | 930K | Sep 2003 – Feb 2023 |
| Spence G-9-85615 | THP Operating LLC only | Jan-Jerrye, SE. (Canyon Reef) | Schleicher | 1 | 406 | 1.22M | Jan 1993 – Apr 2026 |
| Gill, John G-5-43045 | Spence, Ralph Oil Company, Inc. only | Pokey (Rodessa) | Limestone | 1 | 277 | 43.2K | Jan 1993 – Oct 1998 |
| Spence, D. W. G-9-83506 | Blackstone Energy Services LLC only | Jan-Jerrye, SE. (Canyon Reef) | Schleicher | 1 | 243 | 958K | Jan 1993 – Apr 2026 |
| Spence "A" G-14-137293 | Courson Oil & Gas, Inc. only | Perryton (Chester) | Ochiltree | 1 | 238 | 135K | Jan 1993 – Sep 2020 |
| Spence Estate G-9-82108 | THP Operating LLC only | Jan-Jerrye, SE. (Canyon Reef) | Schleicher | 1 | 223 | 1.39M | Jan 1993 – Apr 2026 |
| Spence Estate G-9-74786 | Chaparral Energy, L.L.C. only | Jan-Jerrye, SE. (Canyon Reef) | Schleicher | 1 | 221 | 51.7K | Feb 1994 – Jul 2008 |