| Randall-Whiton Miocene Oil Unit O-3-22093 | MW Petroleum Corporation only | Hastings (M-14-A) | Brazoria | 1 | 3.1K | 7 | Jul 1993 – Jan 1994 |
| Houston "M" G-3-150500 | Elliott Oil Company, L.P. only | Chocolate Bayou, NE. (9910) | Brazoria | 1 | 3.1K | 268K | Jul 1994 – Oct 2008 |
| Christian, C. D. Unit G-3-126176 | Brazos Petroleum, Inc. only | Old Ocean, East (10500) | Brazoria | 1 | 3.09K | 337K | by Jan 1993 – Nov 1994 |
| Old Ocean Unit G-3-235541 | Hilcorp Energy Company only | Old Ocean (Chenault) | Brazoria | 1 | 3.07K | 200K | Apr 2008 – Feb 2010 |
| Knape G-3-170908 | Gcows Operating LLC only | Rowan, NE (Frio 10600) | Brazoria | 1 | 3.07K | 1.25M | Feb 1999 – Apr 2026 |
| Drisdale Gas Unit G-3-129519 | Reunion Energy Company only | Alvin, North (8450) | Brazoria | 1 | 3.05K | 70.5K | by Jan 1993 – Aug 1993 |
| Summers, E. L. G-3-43201 | Gcows Operating LLC only | Rowan, North (10,800) | Brazoria | 1 | 3.04K | 1.23M | by Jan 1993 – Mar 2024 |
| Clemens State Farm -B- G-3-132359 | Trinidad Resources, LLC only | Clemens, N. (Frio P-1) | Brazoria | 1 | 2.95K | 1.72M | by Jan 1993 – Feb 2025 |
| Todd G-3-176249 | Gaither Petroleum Corporation only | Liverpool (10,400) | Brazoria | 1 | 2.9K | 230K | Jun 1999 – Feb 2000 |
| Aisd/Abraham G-3-208594 | Lapis Operating, Inc. only | Rowan, N. (Frio, Upper) | Brazoria | 1 | 2.9K | 34.3K | Feb 2005 – Oct 2005 |
| Andrau, William O-3-22713 | Daniels Corporation, The only | Chocolate Bayou (Frio, First) | Brazoria | 1 | 2.89K | 165K | Feb 1995 – Dec 1995 |
| Munson O-3-16571 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 1 | 2.82K | 93 | by Jan 1993 – Sep 2000 |
| Congregation Beth Yeshurun O-3-10855 | Radius Operating, LLC only | West Columbia New | Brazoria | 1 | 2.78K | 301 | by Jan 1993 – Dec 2013 |
| Old Ocean Unit G-3-45146 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 2.77K | 593K | by Jan 1993 – Jun 1994 |
| Stanger G-3-233771 | Slawson Exploration Company, Inc only | Old Ocean, NE. (10800) | Brazoria | 1 | 2.75K | 386K | Dec 2007 – Apr 2009 |
| Old Ocean Unit G-3-287283 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 2.73K | 131K | Apr 2019 – Aug 2026 |
| Sun Fee G-3-271066 | Paleo Oil Company LLC only | Oyster Creek (6450 Sand) | Brazoria | 1 | 2.71K | 1.22M | Nov 2012 – Apr 2026 |
| Sun Fee G-3-250524 | Paleo Oil Company LLC only | Oyster Creek (6420 Sand) | Brazoria | 1 | 2.71K | 1.26M | Aug 2007 – Jan 2010 |
| Pledger Gas Field Unit G-3-7865 | Texas Petroleum Investment Co. only | Pledger (Frio 6500-6800) | Brazoria | 1 | 2.69K | 1.75M | by Jan 1993 – Feb 2025 |
| Old Ocean Unit G-3-123868 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 2.63K | 424K | by Jan 1993 – Sep 1995 |
| Ratliff G-3-208417 | Azimuth Energy, LLC only | Arcola (6750 Frio) | Brazoria | 1 | 2.61K | 351K | Jan 2005 – Aug 2005 |
| Farms, I. P. O-3-23260 | Proline Energy Resources Inc only | Chocolate Bayou ( Alibel) | Brazoria | 1 | 2.6K | 47.3K | Apr 1996 – Jan 1997 |
| State of Texas #49829, Tract #5 G-3-46733 | Rutherford Oil Corporation only | Clemens, N. (Frio B) | Brazoria | 1 | 2.59K | 964K | by Jan 1993 – Feb 2000 |
| Saunders, Joan et Al G-3-254262 | Vandeveer Energy, LLC only | Alvin, South (#50) | Brazoria | 1 | 2.55K | 674K | May 2009 – May 2010 |
| Farms, I. P. G-3-176259 | Meridian Resource & Expl Co, The only | Chocolate Bayou (Andrau) | Brazoria | 1 | 2.54K | 82.5K | Nov 1999 – Mar 2000 |
| Pledger Gas Field Unit G-3-71057 | Texas Petroleum Investment Co. only | Pledger (Frio 6500-6800) | Brazoria | 1 | 2.48K | 904K | May 1997 – Jul 2026 |
| Pledger Gas Field Unit G-3-7892 | Texas Petroleum Investment Co. only | Pledger (Frio 6500-6800) | Brazoria | 1 | 2.46K | 1.04M | by Jan 1993 – Jun 2011 |
| Elving, Fred O-3-19836 | Denbury Onshore, LLC only | Manvel (FB II, Oligocene A-1) | Brazoria | 1 | 2.46K | 6.42K | by Jan 1993 – Apr 2000 |
| Old Ocean Unit G-3-247092 | Hilcorp Energy Company only | Old Ocean (F-25) | Brazoria | 1 | 2.43K | 126K | Nov 2008 – May 2009 |
| Old Ocean Unit G-3-282112 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 2.42K | 145K | Nov 2016 – Jul 2026 |
| Reynolds Gas Unit "A" G-3-78076 | Sandel Energy, Inc. only | Sweeny (11600 Upper) | Brazoria | 1 | 2.4K | 119K | by Jan 1993 – Mar 2001 |
| Old Ocean Unit G-3-215194 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 2.38K | 409K | Mar 2006 – Dec 2009 |
| Webster G-3-190436 | Azimuth Energy, LLC only | Rowan, NE (Frio 10600) | Brazoria | 1 | 2.37K | 822K | Jul 2002 – Mar 2005 |
| Phillips, J. G. O/A G-3-155686 | Texaco E & P Inc. only | West Columbia New | Brazoria | 1 | 2.36K | 10.8K | Aug 1995 – Oct 1995 |
| Holland Estate G-3-162288 | Texas Independent Explor Ltd. only | Old Ocean North (10150) | Brazoria | 1 | 2.32K | 352K | Jan 1997 – Feb 1999 |
| Imboden G-3-132078 | Enserch Exploration, Inc only | Manor Lake (10000) | Brazoria | 1 | 2.29K | 949K | by Jan 1993 – Nov 1996 |
| State Lease 66709 G-3-69701 | Parker & Parsley Producing L.P. only | Alligator Point (Grubbs, West) | Brazoria | 1 | 2.29K | 59.9K | by Jan 1993 – Apr 1994 |
| Spoor G-3-232429 | Basa Resources, Inc. only | Frio (10560) | Brazoria | 1 | 2.26K | 572K | Nov 2007 – Jun 2012 |
| Angle G-3-182034 | XOG Resources, LLC only | Chocolate Bayou (Andrau) | Brazoria | 1 | 2.24K | 39.2K | Mar 2001 – Aug 2001 |
| Tenbrink O-3-19206 | Magnum Producing, LP only | Chenango, West (8500 Sd.) | Brazoria | 1 | 2.24K | 6.6K | by Jan 1993 – Mar 1994 |
| Peterson, H. L. G-3-135619 | Apache Corporation only | Danbury, SW. (12,100-A) | Brazoria | 1 | 2.17K | 496K | by Jan 1993 – Apr 1996 |
| Pennzoil Fee et Al G-3-84843 | Magnum Producing, LP only | Four Corners (12000) | Brazoria | 1 | 2.15K | 40.2K | by Jan 1993 – Jul 2001 |
| Old Ocean Unit G-3-7621 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 2.14K | 193K | Mar 2009 – Jul 2015 |
| Ramsey Prison Farm O-3-22439 | Hydrocarbon Management, Inc. only | Bell Lake (9100) | Brazoria | 1 | 2.1K | 181K | May 1994 – May 1995 |
| Cloud, Sebesta G-3-187982 | Brigham Oil & Gas, L.P. only | Angleton (Frio 9800) | Brazoria | 1 | 2.1K | 123K | Oct 2001 – Sep 2002 |
| Old Ocean Unit G-3-264906 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 2.08K | 69K | Sep 2011 – May 2012 |
| Blackstone Ivory G-3-278291 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (L. Anomolina) | Brazoria | 1 | 2.07K | 97.9K | Dec 2014 – Jan 2025 |
| Old Ocean Unit G-3-180411 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 2.07K | 43.1K | Oct 2000 – Jul 2001 |
| Purcell, Thomas G-3-194620 | Noble Energy Inc only | Rowan, North (10,600) | Brazoria | 1 | 2.07K | 246K | May 2003 – Jun 2004 |
| Clemens State Tract 8 GU O-3-22980 | Rutherford Oil Corporation only | Clemens, SE. (Frio B) | Brazoria | 1 | 2.06K | 8.26K | May 1996 – Jul 1996 |