| Munson, George G-3-212152 | Aspect Energy, LLC only | Baileys Prairie (Frio 10,500) | Brazoria | 1 | 19.5K | 1.25M | Aug 2005 – Aug 2012 |
| Old Ocean Unit G-3-157759 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 19.5K | 1.92M | Jul 1995 – Dec 2007 |
| Old Ocean Unit G-3-170146 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 19.5K | 4.23M | Aug 1998 – Aug 2003 |
| Schenck G-3-269946 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Wieting Up.) | Brazoria | 1 | 19.4K | 1.02M | Jan 2013 – Mar 2024 |
| Turner, B. L. O-3-22629 | MW Petroleum Corporation only | Hastings (M-14) | Brazoria | 1 | 19.3K | 1.49K | Jan 1995 – Oct 1996 |
| Oliver Unit O-3-11316 | Lucky Lad Energy, LLC only | Oliver (Frio 8640) | Brazoria | 1 | 19.2K | 19.6K | by Jan 1993 – Jul 2018 |
| Belcher, W. T. "A" O-3-10396 | Denbury Onshore, LLC only | Manvel (F.B. II, Oligocene) | Brazoria | 5 | 19.1K | 39.8K | by Jan 1993 – Nov 1996 |
| Wieting, A. M. G-3-165867 | Texaco E & P Inc. only | Chocolate Bayou ( Wieting Up.) | Brazoria | 1 | 19.1K | 908K | Oct 1997 – Mar 1999 |
| Old Ocean Unit G-3-44635 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 19K | 1.59M | by Jan 1993 – Aug 2005 |
| Tri-Wallinder G-3-140615 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (Andrau) | Brazoria | 1 | 18.9K | 2.51M | by Jan 1993 – Sep 2007 |
| Williamson G-3-158703 | Timberwolf Energy, Inc. only | Angleton, S. (Frio 13 FB-C) | Brazoria | 1 | 18.9K | 913K | Apr 1996 – Sep 2004 |
| Price, Witmer O-3-15451 | Elliott Oil & Gas Operating Co. only | Arcola (7400 Frio) | Brazoria | 1 | 18.8K | 12.3K | by Jan 1993 – Feb 1999 |
| Smith T. L., Jr. -D- O-3-4502 | Chevron U. S. A. Inc. only | West Columbia New | Brazoria | 1 | 18.8K | 18.6K | by Jan 1993 – Jan 2006 |
| Carr G-3-192321 | Hemco Development, LLC only | Angleton (Frio, Consolidated) | Brazoria | 1 | 18.7K | 1.42M | Oct 2002 – Sep 2014 |
| Old Ocean Unit G-3-45143 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 18.7K | 1.92M | by Jan 1993 – Mar 2003 |
| Old Ocean Unit G-3-31357 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 18.6K | 614K | Mar 2000 – Jan 2008 |
| Old Ocean Unit G-3-235088 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 18.5K | 1.16M | Mar 2008 – Apr 2026 |
| I.P. Farms "C" O-3-25722 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Grubbs Sand) | Brazoria | 1 | 18.4K | 18.7K | Dec 2010 – Jul 2024 |
| Farms, I. P. G-3-152689 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Andrau) | Brazoria | 1 | 18.4K | 1.51M | Mar 1995 – Oct 2023 |
| Angle G-3-184757 | XOG Resources, LLC only | Chocolate Bayou ( Frio P) | Brazoria | 1 | 18.3K | 717K | Aug 2001 – Dec 2012 |
| Parker Masterson O-3-27484 | Sue-Ann Operating, L.C. only | West Columbia New | Brazoria | 1 | 18.3K | 257 | Oct 2018 – Apr 2026 |
| Sneed, Hattie O-3-5620 | Denbury Onshore, LLC only | Hastings, East | Brazoria | 3 | 18.3K | 49.7K | Jun 2006 – Jun 2014 |
| Triangle G-3-193497 | Noble Energy Inc only | Chocolate Bayou, NE. (9910) | Brazoria | 1 | 18.2K | 1.7M | Feb 2003 – Oct 2006 |
| Old Ocean Unit G-3-186140 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 18.1K | 891K | Aug 2001 – Apr 2026 |
| I. P. Farms Unit G G-3-271040 | XOG Resources, LLC only | Chocolate Bayou ( Wieting Lo.) | Brazoria | 1 | 18.1K | 233K | Jan 2013 – Jun 2019 |
| Sweet, E. A. O-3-15499 | Parker & Parsley Development L.P only | Rattlesnake Mound (5850) | Brazoria | 1 | 18K | 6.09K | by Jan 1993 – Mar 1994 |
| Raynor G-3-201507 | Bluestem Natural Gas LLC only | Four Corners (13000) | Brazoria | 1 | 17.8K | 3.87M | May 2004 – Oct 2020 |
| Korenek, L. G-3-194314 | Zachry Exploration, LLC only | Danbury Dome (5655 Sand) | Brazoria | 1 | 17.7K | 1.77M | Apr 2003 – Feb 2008 |
| Farms, I. P. PG O-3-22896 | Tepco, Inc. only | Pegasus Gulf Coast (Grubbs) | Brazoria | 1 | 17.6K | 165K | Jan 1996 – Sep 1996 |
| Banfield O-3-22296 | Howard Exploration, Inc. only | Chocolate Bayou, N. (10300) | Brazoria | 1 | 17.4K | 465K | Jan 1994 – Oct 1996 |
| Old Ocean Unit O-3-24917 | Hilcorp Energy Company only | Old Ocean (12,100) | Brazoria | 1 | 17.3K | 96.4K | Jun 2006 – Nov 2007 |
| Dance Bayou G-3-285234 | Ponderosa Oil & Gas, LLC only | Old Ocean North (9750) | Brazoria | 1 | 17.1K | 878K | May 2018 – Feb 2022 |
| Old Ocean Unit G-3-252298 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 17.1K | 852K | Aug 2009 – Apr 2026 |
| IP Farms G-3-151066 | Elliott Oil & Gas Company only | Chocolate Bayou (Anamolina) | Brazoria | 1 | 17.1K | 1.12M | Aug 1994 – Nov 2000 |
| Belcher, W. T. -B- O-3-10660 | North Central Oil Corp. only | Manvel (F. B. 1, Oligocene E) | Brazoria | 2 | 16.8K | 24.2K | by Jan 1993 – Mar 2003 |
| Clemens State Tract 8 GU G-3-162116 | Rutherford Oil Corporation only | Clemens, SE. (Frio B Fba) | Brazoria | 1 | 16.6K | 257K | Jan 1997 – Apr 1998 |
| Masterson, H. O-3-4486 | Boling Production Company, Inc. only | West Columbia | Brazoria | 4 | 16.5K | 144 | by Jan 1993 – Apr 2026 |
| Davis, Elsie F., Tr. O-3-7717 | Gcows Operating LLC only | Manvel, E. (Oakville #3) | Brazoria | 2 | 16.2K | 4.93K | by Jan 1993 – Jan 2001 |
| Farms, I. P. G-3-168629 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, S. (12900 Frio) | Brazoria | 1 | 16.2K | 653K | Apr 1998 – Jul 2024 |
| Black Stone Ivory G-3-249165 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Wieting Lo.) | Brazoria | 1 | 16.2K | 895K | May 2008 – Jan 2025 |
| Wieting Gas Unit O-3-24408 | Enervest Operating, L.L.C. only | Chocolate Bayou, S. (S Sd.) | Brazoria | 1 | 15.7K | 55.2K | Mar 2003 – Sep 2003 |
| Old Ocean Unit G-3-158667 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 15.7K | 1.42M | May 1995 – Apr 2008 |
| Knape, C. O-3-20470 | McGowan Working Partners, Inc. only | Walk Man (Frio 8000) | Brazoria | 2 | 15.7K | 2.64K | by Jan 1993 – Dec 1996 |
| Kilroy-Vrazel G-3-124695 | HG Operating LLC only | Danbury (Nodosaria) | Brazoria | 1 | 15.6K | 2.77M | by Jan 1993 – Apr 2026 |
| Williamson G-3-224124 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 15.6K | 150K | Jun 2005 – Mar 2026 |
| Old Ocean Unit G-3-234281 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 15.2K | 489K | Jan 2008 – Nov 2016 |
| Tigner G-3-195948 | Noble Energy Inc only | Blue Lake (10500) | Brazoria | 1 | 15.2K | 4.42M | Sep 2003 – Jul 2010 |
| Way, et al Unit O-3-10937 | North Central Oil Corp. only | Manvel (4970) | Brazoria | 1 | 15.1K | 6.96K | by Jan 1993 – Feb 2000 |
| Old Ocean Unit G-3-189750 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 14.9K | 1.21M | Jun 2002 – Feb 2019 |
| Texasgulf, Inc. Fee Unit O-3-23007 | Texas Independent Explor Ltd. only | Old Ocean North (10600) | Brazoria | 2 | 14.8K | 6.5K | Feb 1996 – Jul 1996 |