| Old Ocean Unit O-3-3217 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 2 | 4.47K | 86.2K | Dec 1999 – Jan 2001 |
| Billy D. Smith G-3-281144 | Llox, L.L.C. only | Chenango, East (10400 Frio) | Brazoria | 1 | 4.47K | 668K | Dec 2015 – Sep 2016 |
| Black Stone Ivory O-3-24832 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Frio, First) | Brazoria | 1 | 4.46K | 35.5K | Jan 2006 – Sep 2022 |
| Moller G-3-176213 | Zachry Exploration, Inc. only | Danbury Dome (5655 Sand) | Brazoria | 1 | 4.39K | 29.2K | Feb 2000 – Apr 2000 |
| Masterson O-3-27569 | Sideline Oil & Gas, L.P. only | Damon Mound | Brazoria | 1 | 4.34K | 0 | Jul 2019 – Aug 2026 |
| Midway College -D- O-3-17712 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 4 | 4.33K | 112 | by Jan 1993 – Jan 2003 |
| Wieting, A. M. Gas Unit O/A G-3-156544 | Texaco E & P Inc. only | Chocolate Bayou ( Rycade) | Brazoria | 1 | 4.32K | 332K | Nov 1995 – Mar 1997 |
| Sun Fee G-3-70130 | Paleo Oil Company LLC only | Oyster Creek (Frio 7100) | Brazoria | 1 | 4.31K | 733K | by Jan 1993 – Aug 1996 |
| Nold Gas Unit G-3-169883 | Brigham Oil & Gas, L.P. only | Danbury, S.W. (12700) | Brazoria | 1 | 4.22K | 619K | Jul 1998 – Jul 1999 |
| Old Ocean Unit G-3-211908 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 4.21K | 222K | Nov 2004 – Jan 2008 |
| Burgess, P. L. O-3-3587 | Petroquest Exploration, Inc. only | Rowan | Brazoria | 1 | 4.21K | 15 | Feb 1993 – Apr 1997 |
| Boyles, Edward S. O-3-4612 | NXL Oil, LLC only | Damon Mound | Brazoria | 1 | 4.2K | 30 | by Jan 1993 – Jul 2008 |
| Bernard River Land Dev. Co. -A- G-3-67131 | Sandel Operating Company only | Sweeney (11,600) | Brazoria | 1 | 4.15K | 381K | Dec 1993 – Jul 2008 |
| Farms, I. P. G-3-166128 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Andrau) | Brazoria | 1 | 4.08K | 370K | Oct 1997 – Oct 2023 |
| State of Texas No. 49829 Tr. 5 G-3-189842 | Rutherford Oil Corporation only | Clemens, N. (Frio B) | Brazoria | 1 | 4.08K | 1.6M | Jul 2002 – Apr 2009 |
| Pipkin-Carroll O-3-13407 | Sideline Oil & Gas, L.P. only | West Columbia | Brazoria | 1 | 4.06K | 14 | by Jan 1993 – Aug 2026 |
| Korenek "A" O-3-23607 | Houston Petroleum Company only | Danbury Dome (F-2-B) | Brazoria | 1 | 4.02K | 1.21K | Dec 1998 – May 2000 |
| Old Ocean Unit G-3-177968 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 4.01K | 587K | Feb 2000 – Oct 2005 |
| Andrau, William et Al O-3-22712 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 3.94K | 59.6K | Dec 1994 – Sep 1998 |
| Old Ocean Unit G-3-46098 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 3.9K | 776K | by Jan 1993 – Jul 1998 |
| McMillian G-3-139199 | Magnum Producing, LP only | Manor Lake (10,300) | Brazoria | 1 | 3.85K | 1.8M | by Jan 1993 – Dec 2013 |
| McCarthy G-3-232253 | Slawson Exploration Company, Inc only | Old Ocean, East (10500) | Brazoria | 1 | 3.83K | 439K | Aug 2007 – May 2010 |
| Old Ocean Unit G-3-212759 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 3.74K | 143K | Nov 2005 – Jul 2009 |
| Reynolds Gas Unit B G-3-208872 | Sandel Operating Company only | Sweeney (11,250) | Brazoria | 1 | 3.74K | 477K | Apr 2005 – Aug 2010 |
| Old Ocean Unit G-3-124253 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 3.73K | 3.07M | by Jan 1993 – Dec 1997 |
| Old Ocean Unit G-3-212145 | Hilcorp Energy Company only | Old Ocean (F-10) | Brazoria | 1 | 3.7K | 278K | Sep 2004 – Aug 2026 |
| I.P. Farms G-3-210889 | Atlas Operating LLC only | Chocolate Bayou (Andrau Stray) | Brazoria | 1 | 3.67K | 554K | Jul 2005 – Jun 2015 |
| I. P. Farms Unit G G-3-288207 | XOG Resources, LLC only | Chocolate Bayou (12,000) | Brazoria | 1 | 3.66K | 157K | Jul 2019 – Jun 2020 |
| Ducroz O-3-27996 | Kebo Oil & Gas, Inc. only | Allen Dome (10,700) | Brazoria | 1 | 3.66K | 0 | Mar 2022 – Aug 2025 |
| Houston "FF" G-3-175612 | Elliott Oil Company, L.P. only | Chocolate Bayou, S. (12600 Frio) | Brazoria | 1 | 3.64K | 77.9K | Nov 1999 – Aug 2002 |
| Elving, Fred -A- G-3-160843 | Denbury Onshore, LLC only | Manvel (F.B. II, Oligocene) | Brazoria | 1 | 3.64K | 278K | Sep 1996 – Dec 2013 |
| Hogg, W. C. NCT-1 O-3-4493 | Chevron U. S. A. Inc. only | West Columbia | Brazoria | 3 | 3.6K | 908 | by Jan 1993 – Mar 1994 |
| Old Ocean Unit G-3-199361 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 3.56K | 190K | Nov 2003 – Mar 2008 |
| Old Ocean Unit G-3-7661 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 3.49K | 1.95M | by Jan 1993 – Jul 1998 |
| Old Ocean Unit G-3-49017 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 3.47K | 1.19M | by Jan 1993 – Aug 1998 |
| Cozby O-3-25850 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Alibel) | Brazoria | 1 | 3.46K | 2.22K | Mar 2012 – Sep 2024 |
| I. P. Farms "C" G-3-138339 | Elliott Oil & Gas Company only | Chocolate Bayou, N. (Andrau) | Brazoria | 1 | 3.44K | 362K | by Jan 1993 – May 1996 |
| Old Ocean Unit G-3-135789 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 3.4K | 543K | by Jan 1993 – Mar 1998 |
| Old Ocean Unit G-3-119728 | Hilcorp Energy Company only | Old Ocean (F-23) | Brazoria | 1 | 3.39K | 642K | by Jan 1993 – Nov 1996 |
| Renn, Philip et Al G-3-167788 | Cimarex Energy Co. of Colorado only | Danbury, SW. (12,100-A) | Brazoria | 1 | 3.37K | 452K | Feb 1998 – Jun 2001 |
| Farms, I. P. G-3-264014 | Milagro Exploration, LLC only | Chocolate Bayou (Andrau) | Brazoria | 1 | 3.37K | 76.1K | Dec 2011 – Apr 2013 |
| Wisdom O-3-26197 | Maverick Prod. Co., Inc. only | Nash Dome | Brazoria | 3 | 3.33K | 0 | Oct 2012 – Apr 2014 |
| Marmion G-3-196210 | Well-Co Solutions, LLC only | Old Ocean, NE. (10800) | Brazoria | 1 | 3.3K | 673K | Aug 2003 – Sep 2006 |
| Triangle Development Co. G-3-175126 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (10400) | Brazoria | 1 | 3.29K | 217K | Aug 1999 – Apr 2005 |
| Bennett Estate G-3-218348 | HG Operating LLC only | Danbury Dome (5655 Sand) | Brazoria | 1 | 3.25K | 676K | Jun 2006 – Aug 2026 |
| Masterson Irr. Co. Farm -A- O-3-1104 | Terry, R. K. only | Damon Mound | Brazoria | 3 | 3.22K | 29 | by Jan 1993 – May 1999 |
| IP Farms Unit G G-3-271107 | XOG Resources, LLC only | Chocolate Bayou ( Frio P) | Brazoria | 1 | 3.16K | 72K | Feb 2013 – Sep 2015 |
| Triangle G-3-224958 | Noble Energy Inc only | Chocolate Bayou ( McKelvy) | Brazoria | 1 | 3.15K | 157K | Dec 2006 – May 2007 |
| Old Ocean Unit G-3-75927 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 3.14K | 526K | by Jan 1993 – Sep 2008 |
| Black Stone Ivory G-3-242372 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Anamolina) | Brazoria | 1 | 3.13K | 92.1K | Jun 2007 – May 2008 |