| Houston Fuller C20-4X43 G-10-285430 | BPX Operating Company only | Phantom (Wolfcamp) | Reeves | 1 | 870K | 4.13M | Jun 2018 – Aug 2026 |
| MVP A-152 G-3-257969 | Century Exploration Houston, LLC only | Adams Ranch (Yegua EY-9) | Jasper | 1 | 575K | 10.8M | Mar 2010 – May 2013 |
| Houston Ship Channel Unit G-3-192683 | Ballard Exploration Company,inc. only | Yellow Rose (Yegua Y-2) | Harris | 1 | 441K | 28M | Oct 2002 – Aug 2026 |
| Houston Ship Channel Unit -A- G-3-234163 | Ballard Exploration Company,inc. only | Yellow Rose (Yegua Y-2) | Harris | 1 | 377K | 27.6M | Feb 2007 – Aug 2026 |
| Houston, Sam Unit G-3-182187 | Etoco, L.P. only | Yellow Rose (Yegua Y-2) | Harris | 1 | 64.5K | 4.17M | Dec 2000 – Nov 2008 |
| Nichols-Houston-C4 G-6-276457 | Sabine Energy Inc. only | Henderson, E. (Cotton Valley) | Rusk | 1 | 57.8K | 4.38M | Dec 2014 – Aug 2026 |
| Houston Arts Endowment G-3-212221 | Ballard Exploration Company,inc. only | Myers Subdiv. (LWR Cook MTN) | Liberty | 1 | 49.3K | 2.33M | Jan 2005 – Jan 2017 |
| Moyers-Houston-Haskins G-6-275205 | Sabine Energy Inc. only | Henderson, E. (Cotton Valley) | Rusk | 1 | 49.1K | 3.33M | Jun 2014 – Aug 2026 |
| BP America 'A-39' G-3-247355 | Century Exploration Houston, LLC only | Van Meter (Yegua EY Cons.) | Hardin | 1 | 43.4K | 2.86M | Jun 2008 – Mar 2012 |
| Weinheimer, E. A. G-3-145881 | Houston Hydrocarbons, Inc. (A) only | Alwan (Yegua 7570) | Wharton | 1 | 42.2K | 915K | Mar 1993 – Oct 1998 |
| Arnold Heirs G-3-223833 | Houston Energy, L.P. only | Hamman, East ( Richer) | Matagorda | 1 | 41.9K | 1.07M | Feb 2007 – Dec 2009 |
| Nichols-Houston-Moyers G-6-275591 | Sabine Energy Inc. only | Henderson, E. (Cotton Valley) | Rusk | 1 | 39.6K | 3.22M | Sep 2014 – Aug 2026 |
| Houston Baptist University G-3-179251 | Hilcorp Energy Company only | Husky (8990) | Hardin | 1 | 37.7K | 2.29M | Jun 2000 – Mar 2013 |
| Galveston Block 278-L(mf-106411) G-3-226926 | Hall-Houston Expl. II, L.P. only | Galveston 278-L (Miocene Cons.) | Galveston-LB | 1 | 25.4K | 1.69M | Jul 2007 – Dec 2008 |
| Houston Baptist University G-3-197861 | Hilcorp Energy Company only | Husky (8990) | Hardin | 1 | 24.2K | 184K | Nov 2003 – Dec 2014 |
| Houston "G" G-6-221180 | Sydri Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 22K | 839K | May 2006 – Feb 2021 |
| Houston "A" G-3-176832 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Frio P) | Brazoria | 1 | 22K | 1.66M | Mar 2000 – Jun 2010 |
| S.T. 278-L S/2 (Rutherford Unit) G-3-229797 | Hall-Houston Expl. II, L.P. only | Dolphin Prospect (Rob M 8100) | Galveston-LB | 1 | 17.9K | 4.24M | Jul 2007 – Sep 2012 |
| Buccaneer G-3-279163 | Houston Energy Operating, L.P. only | Angelina (10,600) | Chambers | 1 | 14.7K | 649K | Jun 2014 – Apr 2016 |
| Houston "A" G-3-145127 | Elliott Oil & Gas Company only | Chocolate Bayou, N. (Andrau) | Brazoria | 1 | 14.4K | 2.25M | Apr 1993 – Nov 1999 |
| Houston Baptist University G-3-128871 | Hilcorp Energy Company only | Husky (9200) | Hardin | 1 | 13.9K | 730K | by Jan 1993 – May 2000 |
| Houston Endowment Inc G-4-232986 | Carrizo Oil & Gas, Inc. only | Mud Flats (9000) | Aransas | 1 | 13.8K | 365K | Nov 2007 – Nov 2010 |
| Houston, Sam Unit G-3-132377 | Etoco, L.P. only | Yellow Rose (Yegua Y-2) | Harris | 1 | 13.7K | 795K | Jul 1997 – Jul 2005 |
| Houston G-8-137076 | Petex only | Union Hill (Strawn) | Stephens | 1 | 13.1K | 735K | by Jan 1993 – Aug 2026 |
| Houston "M" G-3-150204 | Howard Exploration, Inc. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 12.5K | 228K | Jun 1994 – Jun 1996 |
| S. T. 310-L N/2 NE/4 G-3-229086 | Hall-Houston Expl. II, L.P. only | Galveston 310-L (Miocene) | Galveston-LB | 1 | 10.9K | 3.7M | Mar 2007 – Aug 2013 |
| Kulawik G-2-153584 | Sonat Exploration Co. - Houston only | Yorktown (Wilcox 11,000 Lo.) | De Witt | 1 | 10.8K | 1.29M | Feb 1995 – Apr 1997 |
| Vrazel G-3-208403 | Houston Petroleum Company only | Danbury Dome (5655 Sand) | Brazoria | 1 | 10.8K | 638K | Jul 2004 – Jan 2007 |
| Houston Farms Dev. G-3-176623 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 9.9K | 1.63M | Mar 2000 – Dec 2017 |
| Kulawik G-2-137735 | Sonat Exploration Co. - Houston only | Yorktown (Wilcox 11,000 Lo.) | De Witt | 1 | 9.48K | 795K | by Jan 1993 – Sep 1994 |
| DCR 203 G-4-148998 | Sonat Exploration Co. - Houston only | Piedre Lumbre (Wilcox) | Duval | 1 | 8.41K | 890K | Mar 1994 – May 1996 |
| Houston Farms Development Co. G-3-5607 | Chaparral Energy, L.L.C. only | Chocolate Bayou, S. (P Frio) | Brazoria | 1 | 7.94K | 459K | by Jan 1993 – Apr 2007 |
| Houston Farms Development Co. G-3-5608 | Chaparral Energy, L.L.C. only | Chocolate Bayou, S. (P Frio) | Brazoria | 1 | 7.31K | 565K | by Jan 1993 – Nov 2009 |
| Houston "I" G-6-221357 | Sydri Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 7.31K | 274K | May 2006 – Feb 2017 |
| Houston "CC" G-3-155416 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Andrau) | Brazoria | 1 | 7.22K | 472K | Aug 1995 – Jul 2021 |
| Houston Corp. Unit G-3-147698 | Redbud E & P, Inc. only | Giddings (Austin Chalk, Gas) | Washington | 1 | 6.9K | 2.55M | Jul 1993 – Aug 2026 |
| Houston G-3-132918 | Lower Colorado River Authority only | Rocky Creek (Edwards) | Fayette | 1 | 6.86K | 5.62M | by Jan 1993 – Feb 2015 |
| Houston "M" G-3-138425 | Howard Exploration, Inc. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 6.81K | 255K | by Jan 1993 – Jun 1994 |
| Houston Ship Channel Unit G-3-182012 | Ballard Exploration Company,inc. only | Houston Ship Chan. (Yegua EY-1) | Harris | 1 | 6.81K | 589K | Feb 2001 – Aug 2002 |
| Houston "M" G-6-224437 | Trivium Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 6.77K | 317K | Oct 2006 – Jul 2017 |
| Houston Gas Unit G-4-162183 | BP America Production Company only | Donna (Knapp) | Hidalgo | 1 | 6.68K | 1.88M | Dec 1996 – Apr 2002 |
| Hubberd G-4-148732 | Houston Exploration Company, The only | Liz (9200) | Webb | 1 | 6.61K | 2.33M | Mar 1994 – Dec 2001 |
| DCR 82A G-4-152269 | Sonat Exploration Co. - Houston only | Ruthie H. (Wilcox) | Duval | 1 | 6.56K | 57.8K | Nov 1994 – Jul 1995 |
| Houston "C" G-6-221041 | Sydri Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 6.53K | 335K | Feb 2006 – Sep 2022 |
| Houston G-6-190153 | Chinn Exploration Company only | County Lake (Travis Peak) | Rusk | 1 | 6.52K | 593K | Jun 2002 – Apr 2009 |
| Houston "D' G-6-222148 | Sydri Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 6.14K | 276K | Jun 2006 – Feb 2023 |
| West Bernard Unit G-3-140082 | Sonat Exploration Co. - Houston only | Bernard, W. (7000) | Wharton | 1 | 6.06K | 674K | by Jan 1993 – Oct 1995 |
| Houston "E" G-6-221178 | Sydri Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 5.79K | 333K | Apr 2006 – May 2023 |
| Houston "B" G-6-220732 | Sydri Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 5.61K | 259K | Mar 2006 – Sep 2018 |
| Houston "N" G-6-224438 | Trivium Operating, LLC only | Henderson, E. (Cotton Valley) | Rusk | 1 | 5.47K | 281K | Oct 2006 – Oct 2016 |