| Old Ocean Unit G-3-282408 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 1.42K | 96.9K | Feb 2017 – Mar 2019 |
| Old Ocean Unit G-3-158221 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 1.39K | 110K | May 1996 – Dec 1998 |
| Pledger Gas Field Unit G-3-228438 | Texas Petroleum Investment Co. only | Pledger (Frio 6500-6800) | Brazoria | 1 | 1.39K | 343K | Oct 2006 – Nov 2014 |
| Bullard/ Strouhal G-3-189212 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 1.39K | 61.8K | May 2002 – Mar 2004 |
| Old Ocean Unit G-3-157798 | Hilcorp Energy Company only | Old Ocean (F- 7) | Brazoria | 1 | 1.36K | 118K | Aug 1995 – Dec 1996 |
| Furnace, J. E. & Lum O-3-11380 | Brute Energy Corporation only | Manvel (F.B. I, Oligocene) | Brazoria | 1 | 1.34K | 450 | by Jan 1993 – Mar 1997 |
| Cozby G-3-149410 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 1.33K | 359K | Mar 1994 – Apr 2001 |
| Farms, I. P. G-3-156341 | Texas Meridian Res. Expl., Inc. only | Chocolate Bayou (12,000) | Brazoria | 1 | 1.32K | 39.4K | Mar 1995 – Aug 1996 |
| Andrau G-3-160813 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (10100) | Brazoria | 1 | 1.3K | 55.1K | Sep 1996 – Jan 1997 |
| Ducroz, James L. G-3-254881 | Endeavor Natural Gas, LP only | Cowtrap (Miocene 6200) | Brazoria | 1 | 1.29K | 904K | Dec 2009 – Oct 2012 |
| Cannon, Elmer M. O-3-21440 | Cavalier Oil & Gas, Inc. only | Bonney (Frio a, Upper) | Brazoria | 1 | 1.28K | 8 | Feb 1993 – Jul 1997 |
| J. W. Surface O-3-23755 | Tri-Union Development Corp. only | Hastings (M-14) | Brazoria | 1 | 1.27K | 4.03K | Dec 1999 – Apr 2000 |
| Lockhart Bank Unit No. 1 G-3-141806 | Sheridan Energy,inc. only | Alvin, South (#48) | Brazoria | 1 | 1.26K | 624K | by Jan 1993 – Oct 1997 |
| Urban Unit G-3-229741 | Rocinante only | Danbury Dome (5655 Sand) | Brazoria | 1 | 1.26K | 153K | Jul 2007 – Jan 2014 |
| Korenek O-3-23815 | Houston Petroleum Company only | Danbury Dome (8500) | Brazoria | 1 | 1.26K | 147 | Mar 2000 – Dec 2003 |
| Wieting Gas Unit G-3-263512 | Dune Operating Company only | Chocolate Bayou (12,000-S) | Brazoria | 1 | 1.23K | 44K | Sep 2010 – Jan 2011 |
| Old Ocean Unit G-3-46824 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 1.21K | 94.9K | May 1995 – Dec 1996 |
| Rucks, A. R. Fee G-3-90724 | Lindenmuth & Associates, Inc. only | Danbury, SW. (13,300) | Brazoria | 1 | 1.2K | 159K | by Jan 1993 – Aug 1995 |
| Andrau, William O-3-23344 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Frio, First) | Brazoria | 1 | 1.2K | 29K | Aug 1997 – Oct 2001 |
| Mound Co. Lease NCT-1 O-3-18683 | Chevron U. S. A. Inc. only | Hoskins Mound | Brazoria | 2 | 1.18K | 339 | by Jan 1993 – Mar 2004 |
| Old Ocean Unit G-3-234300 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 1.17K | 74.7K | Jan 2008 – Aug 2026 |
| Stanger G-3-227994 | Slawson Exploration Company, Inc only | Old Ocean, East (10500) | Brazoria | 1 | 1.17K | 174K | Jun 2007 – Nov 2007 |
| Houston -CC- G-3-30656 | Phillips Petroleum Company only | Chocolate Bayou, S. (Harris) | Brazoria | 1 | 1.16K | 103K | by Jan 1993 – Apr 1995 |
| Old Ocean Unit G-3-33848 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 1.15K | 231K | by Jan 1993 – Sep 1995 |
| Kirshner Heirs G-3-172389 | Sue-Ann Operating, L.C. only | Flagpond (Frio Lower) | Brazoria | 1 | 1.14K | 15.7K | Feb 1999 – May 1999 |
| Huffman, V. S. G-3-162267 | Howard Exploration, Inc. only | Arcola (6750 Frio) | Brazoria | 1 | 1.14K | 36.4K | Feb 1997 – Jul 1998 |
| Tigner, J. H. O-3-5227 | Noxxe Oil and Gas, LLC only | Damon Mound | Brazoria | 2 | 1.13K | 21 | by Jan 1993 – Sep 2018 |
| Grubbs O-3-21876 | Howard Exploration, Inc. only | Chocolate Bayou ( Freeman) | Brazoria | 1 | 1.12K | 5 | by Jan 1993 – May 1993 |
| Price, J. G-3-157389 | Howard Exploration, Inc. only | Arcola (7300 Frio) | Brazoria | 1 | 1.09K | 57.5K | Jan 1996 – Jul 1996 |
| Wieting, A. M. Gas Unit O/A G-3-157758 | Dune Operating Company only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 1.08K | 61.4K | Mar 1996 – Feb 1997 |
| Witmer-Price O-3-24633 | Elliott Oil & Gas Operating Co. only | Arcola (6600 Frio) | Brazoria | 1 | 1.07K | 93 | Sep 2004 – Jan 2005 |
| Old Ocean Unit G-3-99640 | Amoco Production Company only | Old Ocean (F- 7) | Brazoria | 1 | 1.05K | 96K | Mar 1993 – Aug 1996 |
| Wisch-Saint Unit G-3-125994 | Texas Petroleum Investment Co. only | Pledger (Frio 7220) | Brazoria | 1 | 1.03K | 222K | Oct 1993 – Nov 1998 |
| Bar X G-3-189809 | Samedan Oil Corporation only | Baileys Prairie (12,390) | Brazoria | 1 | 1.02K | 36.2K | May 2002 – May 2002 |
| Waller, C. J. Trust G-3-270956 | Aspect Energy, LLC only | Iowa Colony (9050 Vicksburg) | Brazoria | 1 | 1.01K | 21.1K | Jun 2013 – Aug 2018 |
| Habbit G-3-191109 | Noble Energy Inc only | Blue Lake (11,000) | Brazoria | 1 | 1.01K | 92.7K | Oct 2002 – Aug 2003 |
| Old Ocean Unit G-3-49503 | Hilcorp Energy Company only | Old Ocean (Campbell) | Brazoria | 1 | 1K | 635K | by Jan 1993 – May 1996 |
| Korenek, L. G-3-212096 | Zachry Exploration, Ltd. only | Danbury Dome (5655 Sand) | Brazoria | 1 | 1K | 66K | Apr 2005 – Dec 2006 |
| Ducroz, James L. G-3-248244 | Endeavor Natural Gas, LP only | Cowtrap (Miocene 6250) | Brazoria | 1 | 983 | 597K | Feb 2008 – Sep 2009 |
| Wilson, R. K. GU #2 O/A G-3-128380 | Texaco E & P Inc. only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 970 | 130K | by Jan 1993 – Feb 1996 |
| Old Ocean Unit G-3-53741 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 959 | 57K | by Jan 1993 – May 1996 |
| Marmion G-3-211988 | Well-Co Solutions, LLC only | Old Ocean, NE. (10800) | Brazoria | 1 | 954 | 281K | Jul 2005 – Sep 2022 |
| Wieting Gas Unit G-3-267572 | White Marlin Operating Co, LLC only | Chocolate Bayou ( Banfield) | Brazoria | 1 | 953 | 95.7K | Jul 2012 – Aug 2016 |
| B P America O-3-24618 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 1 | 952 | 2 | Oct 2004 – Dec 2010 |
| Sun Fee G-3-257820 | Texas Petroleum Investment Co. only | Oyster Creek (6620 Sand) | Brazoria | 1 | 940 | 498K | Jun 2010 – Oct 2012 |
| Old Ocean Unit O-3-11051 | Hilcorp Energy Company only | Old Ocean (12,100) | Brazoria | 1 | 926 | 17.7K | Aug 1996 – May 1997 |
| Pledger Gfu G-3-131637 | Texas Petroleum Investment Co. only | Pledger (Frio 6500-6800) | Brazoria | 1 | 926 | 518K | by Jan 1993 – Mar 2001 |
| Randall G-3-204346 | Brigham Oil & Gas, L.P. only | Lost Marsh (Frio) | Brazoria | 1 | 921 | 299K | Jan 2004 – Oct 2007 |
| Bastrop Bayou Tract 1 O-3-11244 | Texaco E & P Inc. only | Bastrop Bay (BM-1) | Brazoria | 1 | 912 | 234 | by Jan 1993 – Mar 1993 |
| Wieting Gas Unit G-3-282056 | White Marlin Operating Co, LLC only | Chocolate Bayou ( Rycade) | Brazoria | 1 | 911 | 28.9K | Sep 2016 – Mar 2017 |