| Ryan, Britton O-3-17950 | Gcows Operating LLC only | Manvel, E. (Miocene 3300) | Brazoria | 1 | 57.4K | 1.01K | Jan 1993 – Apr 2026 |
| Old Ocean Unit O-3-25395 | Hilcorp Energy Company only | Old Ocean (12,100) | Brazoria | 1 | 56.4K | 257K | Jul 2009 – Apr 2026 |
| Old Ocean Unit G-3-256619 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 56.3K | 1.91M | Feb 2010 – Apr 2026 |
| Spohn Foundation G-3-295303 | Magnum Producing, LP only | Allen Dome (10,800) | Brazoria | 1 | 56.1K | 757K | Apr 2023 – Dec 2024 |
| Davis, Elsie F. Trustee O-3-16126 | Gcows Operating LLC only | Manvel, E. (Miocene 3300) | Brazoria | 1 | 56K | 9.14K | Jan 1993 – Apr 2026 |
| Charles Duke et al Unit No. 1 O-3-26019 | Sandalwood Exploration, L.P. only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 56K | 86.3K | Aug 2012 – Oct 2014 |
| Vieman, L.D. O-3-21610 | Magnum Producing, LP only | Blue Lake (9400) | Brazoria | 1 | 55.9K | 75.2K | Jan 1993 – Aug 2024 |
| Wilson R. K. G. U. NO 1 G-3-120403 | Texaco E & P Inc. only | Chocolate Bayou (Andrau) | Brazoria | 1 | 55.2K | 1.68M | Jan 1993 – May 1996 |
| Old Ocean Unit G-3-157797 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 54.3K | 3.21M | May 1995 – Jan 2024 |
| Moller, W. A. -B- a/C #3 O-3-1134 | Dartex Energy Corporation only | Danbury Dome (5655 Sand) | Brazoria | 4 | 54.3K | 21 | Jan 1993 – Apr 2023 |
| Marmion O-3-25521 | Well-Co Solutions, LLC only | Old Ocean, NE. (8800 Frio) | Brazoria | 1 | 53.9K | 20.3K | Dec 2006 – Sep 2020 |
| Colby, E. H. Etal O-3-2923 | Denbury Onshore, LLC only | Manvel (Miocene) | Brazoria | 6 | 53.3K | 20.2K | Jan 1993 – Apr 2009 |
| Price, J. O-3-12443 | Elliott Oil & Gas Operating Co. only | Arcola | Brazoria | 2 | 53K | 107K | Apr 1996 – Mar 2021 |
| Kelly O-3-20255 | Proline Energy Resources Inc only | Chenango (9100) | Brazoria | 1 | 52.2K | 36.4K | Jan 1993 – Dec 2017 |
| Farms, I. P. G-3-162899 | Rutherford Oil Corporation only | Chocolate Bayou, S. (13100 Frio) | Brazoria | 1 | 51.4K | 1M | Dec 1996 – Feb 1998 |
| Cozby O-3-22408 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 51K | 98.1K | Apr 1994 – Jul 2025 |
| Brockman, J. C. et Al G-3-176391 | Hilcorp Energy Company only | Old Ocean (12,100) | Brazoria | 1 | 51K | 3.77M | Mar 2000 – Apr 2026 |
| Coon, R. S., -A- O-3-6559 | Boling Production Company, Inc. only | West Columbia | Brazoria | 2 | 49.9K | 144 | Jan 1993 – Apr 2026 |
| Blakely, Bassett -B- O-3-1132 | Orangefield East Corp only | Danbury Dome (5655 Sand) | Brazoria | 9 | 47.8K | 21 | Jan 1993 – Apr 2023 |
| Bintliff Properties O-3-24867 | Aspect Energy, LLC only | Buffalo Camp, N (Frio 10;750) | Brazoria | 1 | 47.6K | 62.2K | Mar 2006 – Jun 2014 |
| Farms, I. P. G-3-155697 | Atlas Operating LLC only | Chocolate Bayou (L. Anomolina) | Brazoria | 1 | 47K | 2.9M | Aug 1995 – Mar 1998 |
| Howard No. 1 GU G-3-152680 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 46.6K | 5.38M | Dec 1994 – Mar 2026 |
| Griffith G-3-226427 | Aspect Energy, LLC only | Blue Lake (11,000) | Brazoria | 1 | 46.5K | 8.14M | Aug 2006 – Apr 2012 |
| Wilson, R. K. Gas Unit No. 1 G-3-149511 | Texaco E & P Inc. only | Chocolate Bayou (12,000) | Brazoria | 1 | 46.3K | 1.85M | Mar 1994 – Jul 1997 |
| Davis, E F O-3-24670 | Gcows Operating LLC only | Manvel, E. (Oakville #3) | Brazoria | 1 | 46.2K | 9.75K | Apr 2005 – Apr 2026 |
| Belcher B58 Unit O-3-23588 | Denbury Onshore, LLC only | Manvel (Oligocene, Frio D) | Brazoria | 1 | 46.1K | 32.2K | Aug 1998 – Mar 2003 |
| Old Ocean Unit G-3-131307 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 46K | 1.76M | Jan 1993 – Dec 1999 |
| Old Ocean Unit G-3-7666 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 45.3K | 3.95M | Jan 1993 – Nov 2003 |
| Stanger G-3-206977 | Hilcorp Energy Company only | Collins Lake (Frio 11,400 FB-B) | Brazoria | 1 | 44.9K | 3.15M | Sep 2004 – Apr 2026 |
| Midway College "C" O-3-15409 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 2 | 44.7K | 90 | Jan 1993 – Oct 2000 |
| Farms, I.P. "C" G-3-161224 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou,n.(andrau Stray) | Brazoria | 1 | 44.7K | 2.63M | Jun 1996 – Oct 2023 |
| Blackstone G-3-284526 | Kebo Oil & Gas, Inc. only | Rattlesnake Mound (7000) | Brazoria | 1 | 44.1K | 220K | Apr 2018 – Jul 2020 |
| Midway College "E" O-3-19652 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 5 | 43.7K | 125 | Jan 1993 – Nov 2004 |
| Houston "M" O-3-21090 | Howard Exploration, Inc. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 43K | 208K | Jan 1993 – Jun 1994 |
| Price, J.E. O-3-15450 | Core E & P Corp. only | Arcola (7400 Frio) | Brazoria | 1 | 42.5K | 40.9K | Jan 1993 – Oct 1998 |
| David Young O-3-27872 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, S. (Frio 9900) | Brazoria | 2 | 42.4K | 0 | Mar 2021 – Aug 2025 |
| I. P. Farms G-3-168017 | Atlas Operating LLC only | Chocolate Bayou,n.(andrau Stray) | Brazoria | 1 | 42.3K | 2.66M | Apr 1998 – Jan 2015 |
| Worrell, R. J., Comm. O-3-8341 | Proline Energy Resources Inc only | Chenango (8500 -B- Sd.) | Brazoria | 1 | 41.9K | 10.8K | Jan 1993 – Dec 2018 |
| St. Joe Gas Unit G-3-194783 | Ipr USA Corp. only | Allen Dome (10,800) | Brazoria | 1 | 41.5K | 6.9M | Feb 2003 – Aug 2006 |
| Witmer-Price O-3-24735 | Elliott Oil & Gas Operating Co. only | Arcola | Brazoria | 1 | 41.2K | 192K | Feb 2005 – Mar 2021 |
| Andrau O-3-23174 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 40.8K | 13.5K | Feb 1997 – Jun 2004 |
| Twin Peaks G-3-294982 | Cimarron Engineering, LLC only | Pegasus Gulf Coast (Big Gas Sd.) | Brazoria | 1 | 40.8K | 640K | Aug 2022 – Jun 2025 |
| Skrla Unit G-3-233245 | Square Mile Energy, L.L.C. only | Gatorville (10600) | Brazoria | 1 | 40.4K | 3.1M | Oct 2007 – Sep 2011 |
| Old Ocean Unit G-3-254804 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 40.2K | 1.71M | Nov 2009 – Apr 2026 |
| Darrington State Farm Tr. 3 O-3-16484 | Byng Energy Group, Inc. only | Darrington (6620 Sand) | Brazoria | 1 | 40.2K | 5.71K | Jan 1993 – Aug 2016 |
| Cozby O-3-27361 | XOG Resources, LLC only | Chocolate Bayou (Alibel Stray) | Brazoria | 1 | 39.5K | 36.1K | Apr 2018 – Jun 2024 |
| Welch Foundation O-3-25058 | Linc Gulf Coast Petroleum, Inc. only | Hoskins Mound | Brazoria | 1 | 39.2K | 0 | May 2006 – Apr 2011 |
| Lockhart Bank Unit No. 3 O-3-20075 | Rosetta Resources Operating LP only | Alvin, South (39 Seg. D) | Brazoria | 2 | 39.2K | 63.4K | Jan 1993 – Apr 1998 |
| Gubert G-3-185590 | LW Dynasty Oil Inc. only | Manvel (Vicksburg) | Brazoria | 1 | 39.1K | 3.42M | Sep 2001 – Feb 2013 |
| Old Ocean Unit G-3-256593 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 39.1K | 1.2M | Mar 2010 – Apr 2026 |