| Spencer O-9-13721 | Felderhoff Production Company only | Needle Creek (Canyon) | McCulloch | 10 | 411K | 123K | Dec 1994 – Apr 2026 |
| Spencer "999" O-14-8032 | Mewbourne Oil Company only | Kiowa Creek (Marmaton) | Ochiltree | 3 | 262K | 1.18M | Sep 2009 – Apr 2026 |
| Junker-Spencer Etal -a- Tr. -B- O-3-1507 | Hilcorp Energy Company only | Fannett | Jefferson | 10 | 201K | 118K | Jan 1993 – Apr 2016 |
| Spencer North 7 O-10-43288 | Apache Corporation only | Spraberry (Trend Area) | Glasscock | 3 | 98.7K | 465K | Aug 2012 – Apr 2026 |
| Spencer, Norman O-10-33917 | Federal Oil, Inc. only | Luther, E. (Canyon Reef) | Howard | 2 | 83.4K | 120K | Jul 1993 – Jun 1998 |
| Junker-Spencer Etal Fee O-3-1511 | Hilcorp Energy Company only | Fannett | Jefferson | 2 | 66.3K | 127K | Jan 1993 – Jul 2005 |
| Spencer, M. E. O-10-14364 | High Desert Resources, L.L.C. only | Spencer | Ward | 20 | 65K | 21 | Jan 1993 – Dec 2011 |
| Stallings, B. M. O-10-11490 | Earnest Producing Corporation only | Spencer | Ward | 5 | 60.2K | 21 | Jan 1993 – Apr 2026 |
| Spencer, Olivia Gas Unit G-9-18866 | Incline Energy only | Eldorado, Southwest (Strawn) | Schleicher | 1 | 39.3K | 5.26M | Jan 1993 – Dec 2020 |
| Peavey, F.L. O-8-19823 | Mathis & Sons, Inc. only | Spencer (Caddo) | Haskell | 1 | 37.6K | 36 | Jan 1993 – Apr 2026 |
| Standard of Texas O-10-6251 | Earnest Producing Corporation only | Spencer | Ward | 4 | 30.5K | 21 | Jan 1993 – Apr 2026 |
| Spencer-Kent-Crane O-4-849 | Omega Energy Corp. only | Fulton Beach (a-4 Miocene) | Aransas | 3 | 29.2K | 11K | Jan 1993 – Aug 2008 |
| Spencer South 7 O-10-44437 | Apache Corporation only | Spraberry (Trend Area) | Glasscock | 3 | 28.2K | 308K | Apr 2013 – Apr 2026 |
| Spencer O-6-14214 | Couch, Gilbert only | Carthage (Burnett Sand) | Harrison | 1 | 26.7K | 177K | Oct 2002 – Apr 2026 |
| Spencer Unit O-1-7088 | Lacy, J. W., Jr. only | Peach Creek (Austin Chalk) | Gonzales | 1 | 22.5K | 5.08K | Jan 1993 – Jan 2001 |
| Spencer "29" G-9-211669 | BCP Resources, LLC only | Blue Danube (Devonian) | Upton | 1 | 22.2K | 1.14M | Apr 2005 – Sep 2019 |
| Spencer, W. E. O-6-12548 | Rockwall Marketing Corporation only | Redwater (Smackover) | Bowie | 1 | 20.9K | 85.4K | Jan 1993 – Dec 1994 |
| Spencer-Kent-Crane O-4-13568 | Wallis Energy, Inc. only | Fulton Beach (C-1-2-3 Sand) | Aransas | 3 | 19.8K | 4.93K | Mar 2009 – Apr 2026 |
| Spencer "29" O-9-15902 | BCP Resources, LLC only | Spraberry (Trend Area) | Upton | 2 | 19K | 87.5K | Aug 2005 – Jul 2017 |
| Spencer, D. D. O-1-7016 | Petroleum Recovery Systems, L.C. only | Salt Flat, West | Caldwell | 5 | 18.9K | 11.6K | Jan 1993 – Mar 2026 |
| 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 |
| Monroe, Cynthia L. O-10-6248 | Raider Oil & Gas Company only | Spencer | Ward | 6 | 15.9K | 21 | Jan 1993 – Dec 2011 |
| University O-10-6247 | Avra Oil Company only | Spencer | Ward | 6 | 15.8K | 67 | Jan 1993 – Sep 2018 |
| Smith Brothers O-10-6252 | Earnest Producing Corporation only | Spencer | Ward | 1 | 15.6K | 24 | Jan 1993 – Dec 2011 |
| Spencer Gas Unit G-6-229747 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 15.4K | 593K | Oct 2007 – May 2019 |
| Spencer O-10-32379 | Lonesome B, LLC only | Ward-Estes, North | Ward | 2 | 15.2K | 9.31K | Jan 1993 – Feb 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 |
| Flint, Spencer B. O-13-23505 | Wise Production Company only | Newport, S. (Atoka Congl.) | Jack | 1 | 13.6K | 45.9K | Jan 1993 – Jun 2025 |
| Univ. -FHL- O-10-17795 | Diamondback E&P LLC only | Spencer | Ward | 1 | 12.5K | 216 | Jan 1993 – Apr 2026 |
| Jones-Spencer Unit O-3-20861 | Rme Petroleum Company only | Giddings (Austin Chalk-3) | Burleson | 1 | 12.1K | 167K | Jan 1993 – Sep 1999 |
| 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 |
| Spencer Gas Unit G-6-234350 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 9.43K | 500K | Oct 2007 – May 2024 |
| Spencer O-1-18836 | Tesuque Oil & Gas LLC only | Minerva-Rockdale | Milam | 4 | 9.12K | 0 | Feb 2014 – Nov 2025 |
| 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 |
| Monroe -A- O-10-12909 | Raider Oil & Gas Company only | Spencer | Ward | 2 | 8.04K | 21 | Jan 1993 – Dec 2011 |
| Spencer O-13-19594 | Mountain Creek Oil Company, Inc. only | Montague County Regular | Montague | 3 | 7.16K | 14 | Aug 1993 – Apr 2026 |
| Spencer, Ruth O-9-8669 | Mexco Energy Corporation only | Bronte (Ellenburger) | Coke | 1 | 7.02K | 25 | Jan 1993 – Dec 1996 |
| 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 |
| Spencer O-6-13022 | Blazer Resources, Inc. only | Pittsburg | Camp | 1 | 6.51K | 176 | Jan 1993 – Oct 2017 |
| Spencer Trust 20 O-10-46860 | SM Energy Company only | Spraberry (Trend Area) | Howard | 1 | 5.96K | 11K | Jun 2014 – Apr 2021 |
| Spencer, Annie G-9-18772 | XTO Energy Inc. only | Brown-Bassett (Ellenburger) | Terrell | 1 | 5.31K | 10.3M | Jan 1993 – Apr 2020 |
| Spencer Gas Unit G-6-242134 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 3.98K | 319K | Aug 2008 – Apr 2026 |
| Sollock -A- O-14-3953 | Correll, Spencer only | Horizon (Cleveland) | Ochiltree | 1 | 3.43K | 7.76K | Feb 1994 – Aug 1999 |
| Murchison-Spencer O-10-6246 | Earnest Producing Corporation only | Spencer | Ward | 3 | 3.29K | 13 | Jan 1993 – Dec 2011 |
| Junker Spencer O-3-27108 | Hilcorp Energy Company only | Fannett | Jefferson | 10 | 3.24K | 12.5K | May 2016 – May 2018 |
| Spencer Gas Unit G-6-242133 | Brookston Energy, Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 2.96K | 309K | Aug 2008 – May 2024 |
| Spencer, Angeline O-3-20514 | Umc Petroleum Corporation only | Sugar Valley (Talcott A) | Matagorda | 1 | 2.8K | 2.79K | Jan 1993 – Apr 1995 |
| Spencer, Angeline O-3-8087 | Devon Energy Production Co, L.P. only | Sugar Valley (Frio 9,195) | Matagorda | 2 | 2.61K | 7.13K | Jan 1993 – Jan 1997 |