| Old Ocean Unit G-3-7658 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 38.9K | 3.79M | by Jan 1993 – Jul 2005 |
| I. P. Farms PA G-3-158232 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (Andrau) | Brazoria | 1 | 38.7K | 2.96M | Mar 1996 – Jan 2025 |
| Ramsey Prison Farm "B" O-3-17186 | Sage Energy Company only | Lochridge (Frio KK) | Brazoria | 1 | 38.6K | 38.7K | by Jan 1993 – Jul 2000 |
| IP Farms O-3-27220 | Black Gold Petroleum, LLC only | Danbury Dome (5655 Sand) | Brazoria | 1 | 38.5K | 24.2K | Oct 2016 – Jun 2024 |
| Williamson, et Al G-3-193463 | Timberwolf Energy, Inc. only | Angleton, South (12,100 Frio) | Brazoria | 1 | 38K | 1.16M | Nov 2002 – Mar 2026 |
| Scout G-3-297176 | Tri-C Resources Partners I, LLC only | Iowa Colony (9050 Vicksburg) | Brazoria | 1 | 37.7K | 601K | Feb 2024 – Apr 2026 |
| Crawford G-3-213571 | Aspect Energy, LLC only | Iowa Colony (9700 Vicksburg) | Brazoria | 1 | 36.2K | 4.24M | Apr 2006 – Nov 2010 |
| Gewil G-3-137749 | XOG Resources, LLC only | Chocolate Bayou (Andrau) | Brazoria | 1 | 36.2K | 870K | by Jan 1993 – Sep 2002 |
| Banfield G-3-181482 | XOG Resources, LLC only | Chocolate Bayou ( Frio P) | Brazoria | 1 | 35.9K | 1.83M | Feb 2001 – Jun 2009 |
| Old Ocean Unit G-3-223381 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 35.7K | 1.84M | Aug 2006 – Apr 2026 |
| Flag Pond G-3-261670 | Ponderosa Oil & Gas, LLC only | Flagpond (Frio Lower) | Brazoria | 1 | 35.6K | 2.2M | May 2011 – Oct 2025 |
| Nold Gas Unit G-3-175960 | Brigham Oil & Gas, L.P. only | Danbury, SW. (12,690) | Brazoria | 1 | 35.3K | 3.34M | Jun 2000 – Mar 2011 |
| Mora Fee O-3-5584 | Sideline Oil & Gas, L.P. only | Hastings, East | Brazoria | 5 | 35.3K | 32 | by Jan 1993 – Mar 2026 |
| Banneyer G-3-228414 | Aspect Energy, LLC only | Iowa Colony (9700 Vicksburg) | Brazoria | 1 | 35K | 713K | Apr 2007 – Feb 2010 |
| Colby, E. H., et Al O-3-10383 | North Central Oil Corp. only | Manvel (F.B. I, Oligocene) | Brazoria | 2 | 34.8K | 8.65K | by Jan 1993 – Jun 2002 |
| Wisdom, Belle Estate O-3-3136 | Harrison Interests, Ltd. only | Nash Dome | Brazoria | 20 | 34.8K | 19 | by Jan 1993 – Jun 2003 |
| Old Ocean Unit G-3-135848 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 34.8K | 4.22M | by Jan 1993 – Nov 2011 |
| Old Ocean Unit G-3-108766 | Hilcorp Energy Company only | Old Ocean (F- 8) | Brazoria | 1 | 34.7K | 2.66M | by Jan 1993 – Apr 2026 |
| Old Ocean Unit G-3-185090 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 34.7K | 2.09M | May 2001 – Jul 2012 |
| Goldman, R. O-3-4506 | Chevron U. S. A. Inc. only | West Columbia New | Brazoria | 4 | 34.5K | 469 | by Jan 1993 – Dec 2004 |
| Fay, Albert O-3-19800 | Palmer Petroleum Inc. only | Bonney, N. (Frio 7660) | Brazoria | 1 | 34.4K | 14.2K | by Jan 1993 – Dec 1999 |
| I. P. Farms G-3-161438 | Meridian Resource & Expl Co, The only | Chocolate Bayou (IP 1) | Brazoria | 1 | 34.4K | 1.7M | Jul 1996 – Dec 1998 |
| Arco O-3-22461 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 2 | 34.3K | 125 | Jul 1994 – Mar 2005 |
| I P Farms #2 UT G-3-111453 | Rutherford Oil Corporation only | Chocolate Bayou,s. (12300 Frio) | Brazoria | 1 | 34K | 2.27M | by Jan 1993 – Jan 2000 |
| Devon Fee G-3-201831 | Bluestem Natural Gas LLC only | Four Corners (13000) | Brazoria | 1 | 33.6K | 4.11M | Feb 2004 – Apr 2026 |
| Belcher, W.T. "A" O-3-23157 | Denbury Onshore, LLC only | Manvel (Miocene 3600) | Brazoria | 1 | 33.2K | 66.1K | Oct 1996 – May 2009 |
| Houston "A" O-3-25657 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 33K | 20.3K | Jul 2010 – Jan 2025 |
| Hogg, Mike -A- O-3-4501 | Chevron U. S. A. Inc. only | West Columbia New | Brazoria | 5 | 33K | 7.97K | by Jan 1993 – Dec 2001 |
| Flag Pond G-3-287863 | Ponderosa Oil & Gas, LLC only | Flagpond (Frio Lower) | Brazoria | 1 | 32.9K | 1.83M | Aug 2018 – Oct 2025 |
| South Texas Water Co. O-3-23316 | Palmer Petroleum Inc. only | Bonney, East (Marg) | Brazoria | 1 | 32.6K | 3.52K | Feb 1996 – Nov 1997 |
| Tovrea, Allen T. et Al G-3-134410 | Coastal Expanse Oil & Gas only | Algoa, South (Tex 2 Sand) | Brazoria | 1 | 32.1K | 497K | by Jan 1993 – Sep 2022 |
| H. O. F. A. B O-3-27957 | Denbury Onshore, LLC only | Manvel (F.B. II, Oligocene) | Brazoria | 1 | 31.6K | 5.84K | Dec 2021 – Dec 2023 |
| Benard River Land Development G-3-30584 | Sandel Operating Company only | Old Ocean (Campbell) | Brazoria | 1 | 31.4K | 4.72M | by Jan 1993 – Dec 2021 |
| Howard No. 2 GU G-3-154623 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 30.8K | 4.11M | May 1995 – Mar 2026 |
| I. P. Farms 366 Ac. Gas Unit G-3-177445 | Rutherford Oil Corporation only | Chocolate Bayou, S. (LHF-Frio) | Brazoria | 1 | 30.7K | 1.16M | Apr 2000 – Mar 2005 |
| Farms, I. P. PG Unit G-3-160437 | Tepco Resources, Inc. only | Pegasus Gulf Coast (Grubbs) | Brazoria | 1 | 30.4K | 254K | Sep 1996 – Mar 2000 |
| Welch Foundation G-3-211378 | Sandpoint Texas LLC only | Hoskins Mound | Brazoria | 1 | 30.4K | 144K | Apr 2005 – Sep 2012 |
| Bennett Estate G-3-198252 | HG Operating LLC only | Danbury Dome (5655 Sand) | Brazoria | 1 | 30.3K | 1.84M | Oct 2003 – Feb 2022 |
| Arnold -B- O-3-4483 | Chevron U. S. A. Inc. only | West Columbia | Brazoria | 2 | 29.7K | 9.24K | by Jan 1993 – Dec 2002 |
| Lake Alaska O-3-26327 | Amrwr, LLC only | Blue Lake ( 9,200) | Brazoria | 1 | 29.5K | 29.7K | Oct 2013 – Jun 2017 |
| Old Ocean Unit G-3-234264 | Hilcorp Energy Company only | Old Ocean (Chenault) | Brazoria | 1 | 29.5K | 1.44M | Jan 2008 – Nov 2024 |
| H. O. F. A. O-3-19869 | Argent Energy (US) Holdings Inc. only | Manvel (Miocene 3300) | Brazoria | 1 | 29.3K | 1.22K | by Jan 1993 – Apr 2010 |
| Todd O-3-23093 | Gaither Petroleum Corporation only | Liverpool (Todd 10,600) | Brazoria | 1 | 29.3K | 6.88K | Oct 1996 – May 1999 |
| Flag Pond G-3-271077 | Ponderosa Oil & Gas, LLC only | Flagpond (Frio Lower) | Brazoria | 1 | 29.2K | 1.65M | Jun 2012 – Nov 2025 |
| Smith G-3-201403 | Noble Energy Inc only | Angleton, South (12,100 Frio) | Brazoria | 1 | 29.2K | 1.52M | Mar 2004 – Aug 2010 |
| Schmidt G-3-191427 | Stealth Onsite Solutions LLC only | Danbury Dome (5655 Sand) | Brazoria | 1 | 28.7K | 2.4M | Jun 2002 – Jan 2014 |
| Fite Fee O-3-10842 | Channa Operating, LLC only | Sandy Point, West (6500) | Brazoria | 1 | 28.1K | 194 | by Jan 1993 – May 2016 |
| Old Ocean Unit G-3-7587 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 28K | 4.27M | by Jan 1993 – Feb 2004 |
| Mellinger O-3-20439 | Sideline Oil & Gas, L.P. only | Danbury Dome, N. (Marg Frio) | Brazoria | 1 | 27.6K | 20 | by Jan 1993 – May 2016 |
| Blakely, Bassett -B- O-3-1126 | Dartex Energy Corporation only | Danbury Dome | Brazoria | 5 | 27.2K | 21 | by Jan 1993 – Apr 2023 |