| Smith, T. L. Jr., et Al O-3-24778 | Aroc (Texas) Inc. only | Pledger (Cornelius 7550) | Brazoria | 1 | 6.03K | 59.8K | May 2005 – May 2006 |
| Williams, H. G. B O-3-27834 | Denbury Onshore, LLC only | Hastings, East | Brazoria | 1 | 6.02K | 15.2K | Oct 2020 – Apr 2026 |
| State Tract 21 G-3-229731 | Hemco Production, L. L. C. only | Alligator Point (Miocene 6450) | Brazoria | 1 | 6.01K | 2.58M | Jul 2007 – Dec 2012 |
| Gibson O-3-20952 | Whiting Petroleum Corporation only | Lochridge | Brazoria | 1 | 5.99K | 5.77K | by Jan 1993 – Aug 1996 |
| Rosalee O-3-26889 | Viceroy Petroleum, LP only | Allen Dome | Brazoria | 1 | 5.93K | 0 | Oct 2015 – Mar 2017 |
| Price, J. E. G-3-176598 | Elliott Oil & Gas Operating Co. only | Arcola (7300 Frio) | Brazoria | 1 | 5.93K | 95.3K | Feb 2000 – Oct 2003 |
| Harrison G-3-230867 | Slawson Exploration Company, Inc only | Angleton, South (12,100 Frio) | Brazoria | 1 | 5.87K | 117K | Jul 2007 – Mar 2009 |
| Old Ocean Unit G-3-145064 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 5.85K | 255K | Feb 1994 – Oct 1996 |
| Bryan Estate O-3-1090 | Noxxe Oil and Gas, LLC only | Damon Mound | Brazoria | 4 | 5.85K | 31 | by Jan 1993 – Mar 2013 |
| Locke O-3-24031 | Samedan Oil Corporation only | Algoa, West (Frio, Middle) | Brazoria | 1 | 5.79K | 468 | Jun 2001 – Feb 2002 |
| I. P. Farms G-3-169189 | Elliott Oil & Gas Company only | Chocolate Bayou ( Wieting Up.) | Brazoria | 1 | 5.77K | 140K | Nov 1997 – Jul 1998 |
| State of Texas Lease #49829 G-3-236335 | Rutherford Oil Corporation only | Clemens, N. (Frio C) | Brazoria | 1 | 5.76K | 252K | Apr 2008 – Mar 2010 |
| Farms, I. P. "C" G-3-177620 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 5.72K | 911K | May 2000 – Nov 2010 |
| Westmoreland, J.W. O-3-18646 | Lapis Operating, Inc. only | Bell Lake (8800) | Brazoria | 1 | 5.69K | 3.44K | by Jan 1993 – Mar 1995 |
| Old Ocean Unit G-3-242495 | Hilcorp Energy Company only | Old Ocean (F-10) | Brazoria | 1 | 5.63K | 179K | Sep 2008 – Aug 2017 |
| King, J.A. O-3-18893 | Howard Exploration, Inc. only | Old Ocean, E. (10400) | Brazoria | 1 | 5.56K | 28 | Feb 1993 – Aug 1995 |
| Moeller, W. A. O-3-21005 | Tri-Union Development Corp. only | Danbury Dome (5655 Sand) | Brazoria | 1 | 5.54K | 2.3K | by Jan 1993 – Jul 1996 |
| Smu O-3-24413 | Noble Energy Inc only | Algoa, South (Tex 2 Sand) | Brazoria | 1 | 5.54K | 185K | Aug 2003 – Apr 2004 |
| McFarland, Robert et Al G-3-133771 | Texas Petroleum Investment Co. only | Pledger (Frio 7200) | Brazoria | 1 | 5.49K | 733K | by Jan 1993 – Nov 2002 |
| Wickwillow O-3-19067 | Corum Production Company only | Rowan, N. (Frio, Upper 9600) | Brazoria | 2 | 5.48K | 22 | by Jan 1993 – Nov 1995 |
| McMeans O-3-4474 | Boling Production Company, Inc. only | West Columbia | Brazoria | 1 | 5.45K | 92 | by Jan 1993 – Sep 2000 |
| Old Ocean Unit G-3-158178 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 5.42K | 643K | May 1995 – Aug 2003 |
| Korenek G-3-172989 | Houston Petroleum Company only | Danbury, South (Frio 11,700) | Brazoria | 1 | 5.39K | 275K | Nov 1998 – Apr 2006 |
| Strunk A G-3-214806 | Aspect Energy, LLC only | Baileys Prairie (McCarthy) | Brazoria | 1 | 5.26K | 562K | Oct 2005 – Aug 2006 |
| Wilson, R. K. Gas Unit No. 1 G-3-154058 | Texaco E & P Inc. only | Chocolate Bayou (12,000) | Brazoria | 1 | 5.24K | 269K | Feb 1995 – Sep 1995 |
| Old Ocean Unit O-3-3216 | Hilcorp Energy Company only | Old Ocean (Chenault) | Brazoria | 3 | 5.1K | 41.9K | Dec 1998 – Mar 1999 |
| Old Ocean Unit G-3-272241 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 5.07K | 236K | Nov 2012 – Aug 2026 |
| Plummer G-3-159111 | Gaither Petroleum Corporation only | Chocolate Bayou | Brazoria | 1 | 5.04K | 182K | May 1996 – Dec 1996 |
| Schenck G-3-283501 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( 9,300) | Brazoria | 1 | 5.03K | 72.7K | Jul 2017 – Jan 2018 |
| Old Ocean Unit G-3-136135 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 4.98K | 998K | by Jan 1993 – Oct 1997 |
| Old Ocean Unit G-3-131011 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 4.96K | 1.65M | by Jan 1993 – Feb 1998 |
| Black Stone G-3-290826 | Kebo Oil & Gas, Inc. only | Pegasus Gulf Coast (Big Gas Sd.) | Brazoria | 1 | 4.95K | 177K | Jan 2021 – Dec 2021 |
| Clement, H. O-3-3591 | Elliott Oil & Gas Operating Co. only | Rowan, South (8500 Sand) | Brazoria | 3 | 4.94K | 0 | Nov 1997 – Oct 2001 |
| I. P. Farms 366 Acre Gas Unit G-3-191539 | Rutherford Oil Corporation only | Chocolate Bayou, S. (12900 Frio) | Brazoria | 1 | 4.91K | 144K | Sep 2002 – Mar 2004 |
| Andrau, William G-3-157331 | Daniels Corporation, The only | Chocolate Bayou (Frio, First) | Brazoria | 1 | 4.84K | 207K | Jan 1996 – Jul 1997 |
| Old Ocean Unit G-3-108921 | Hilcorp Energy Company only | Old Ocean (F- 8) | Brazoria | 1 | 4.83K | 124K | Nov 1994 – Jun 1996 |
| Munson Unit G-3-186950 | Alpine Resources, Inc. only | Angleton, South (12,100 Frio) | Brazoria | 1 | 4.76K | 380K | May 2001 – Oct 2001 |
| Vieman GU G-3-174129 | EOG Resources, Inc. only | Manor Lake (10000) | Brazoria | 1 | 4.74K | 701K | Jul 1999 – Mar 2001 |
| Ankenman Family G-3-201848 | Noble Energy Inc only | Angleton (Tex-Miss 11,000) | Brazoria | 1 | 4.72K | 653K | May 2004 – Apr 2011 |
| Peterson, H. L. O-3-23035 | Apache Corporation only | Danbury, SW. (Nodosaria) | Brazoria | 1 | 4.72K | 17.8K | Jul 1996 – Dec 1996 |
| Old Ocean Unit G-3-293897 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 4.67K | 240K | Dec 2022 – Aug 2026 |
| Cannon, George H. et. Al. O-3-22375 | Offspring Well Salvage only | Bonney, North (7700) | Brazoria | 1 | 4.64K | 8 | Feb 1994 – Dec 1995 |
| Farms, I. P. G-3-138468 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (10400) | Brazoria | 1 | 4.64K | 300K | by Jan 1993 – Nov 1994 |
| Old Ocean Unit G-3-233974 | Hilcorp Energy Company only | Old Ocean (F-26) | Brazoria | 1 | 4.63K | 185K | Nov 2007 – Nov 2008 |
| Wilson, R. K. "B" G-3-182397 | White Marlin Operating Co, LLC only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 4.62K | 310K | Sep 2000 – Nov 2023 |
| Saunders, Joan et Al G-3-272050 | Vandeveer Energy, LLC only | Alvin, South (#48) | Brazoria | 1 | 4.54K | 779K | Jul 2010 – Mar 2015 |
| Flag Pond G-3-288918 | Ponderosa Oil & Gas, LLC only | Flagpond (Frio Lower) | Brazoria | 1 | 4.54K | 446K | Sep 2019 – Oct 2025 |
| Renn Gas Unit G-3-174088 | Brigham Oil & Gas, L.P. only | Danbury, SW. (12,400-B) | Brazoria | 1 | 4.54K | 580K | Jul 1999 – Oct 2000 |
| Grubbs G-3-145820 | Howard Exploration, Inc. only | Chocolate Bayou, N. (9700) | Brazoria | 1 | 4.52K | 285K | Jun 1993 – Mar 1995 |
| Korenek O-3-23082 | Houston Petroleum Company only | Danbury Dome (8500) | Brazoria | 1 | 4.49K | 17 | May 1996 – Oct 1997 |