| City of Portland Gas Unit "C" G-4-141709 | Mission River Systems, Inc. | Portland, W. (F-9) | San Patricio | 1 | 19.3K | 472K | Jan 1993 – Feb 1996 |
| Cage G-4-139403 | Mission River Systems, Inc. | Tres Encinos (7390) | Brooks | 1 | 4.44K | 533K | Jan 1993 – Aug 2013 |
| Sweeney, J. J. G-4-190554 | Mission River Systems, Inc. | Donna (8500) | Hidalgo | 1 | 4.03K | 203K | Aug 2002 – Apr 2010 |
| Rio Grande Bible Inst. U G-4-43755 | Mission River Systems, Inc. | Edinburg, S. (Marks 11100) | Hidalgo | 1 | 3.37K | 556K | Jan 1993 – Feb 2012 |
| Hidalgo-Willacy G-4-148331 | Mission River Systems, Inc. | La Copita (Vicksburg Cons.) | Starr | 1 | 3.25K | 62.1K | Jun 1993 – Sep 2010 |
| W. T. Wolcott Estate Gas Unit G-4-192594 | Mission River Systems, Inc. | May (4 Sand, Middle Seg. A) | Kleberg | 1 | 2.9K | 256K | Sep 2002 – Feb 2005 |
| Sweeney, J.J. G-4-144506 | Mission River Systems, Inc. | Donna (Rice) | Hidalgo | 1 | 2.45K | 138K | Jan 1993 – Feb 2000 |
| Trevino G-2-177961 | Mission River Systems, Inc. | Refugio Old (5300) | Refugio | 1 | 2.1K | 379K | Jun 1999 – Apr 2010 |
| Sweeney G-4-144949 | Mission River Systems, Inc. | Donna (5290) | Hidalgo | 1 | 2.01K | 119K | Mar 1993 – Mar 2000 |
| Franklin-Vance Unit G-2-149069 | Mission River Systems, Inc. | Texana, North (Frio 6900) | Jackson | 1 | 1.66K | 91.6K | Apr 1994 – Jun 2000 |
| Heard G-4-134042 | Mission River Systems, Inc. | El Benadito, S. (Vicksburg 9400) | Starr | 1 | 1.45K | 26.5K | Jan 1993 – Aug 2004 |
| Sweeney, J.J. G-4-147280 | Mission River Systems, Inc. | Alamo (Sanders 7220) | Hidalgo | 1 | 1.18K | 52.3K | Oct 1993 – Oct 1999 |
| Sweeney, J. J. G-4-176655 | Mission River Systems, Inc. | Alamo (8050) | Hidalgo | 1 | 1.01K | 349K | Mar 2000 – Nov 2001 |
| Dorsogna G-4-126696 | Mission River Systems, Inc. | Bishop, East (7200) | Nueces | 1 | 959 | 153K | Jan 1993 – May 1996 |
| Beckman G-4-196836 | Mission River Systems, Inc. | May (Massive 3) | Kleberg | 1 | 289 | 36.2K | Mar 2003 – May 2005 |
| Petroquest JV -Elliot G-4-244521 | Mission River Systems, Inc. | Bishop, East (8350) | Nueces | 1 | 257 | 20.7K | Jan 2009 – Apr 2009 |
| Sweeney, J. J. G-4-190576 | Mission River Systems, Inc. | Donna (5290) | Hidalgo | 1 | 60 | 139K | Aug 2002 – Jul 2006 |
| Slick Sand Oil Unit G-2-225819 | Mission River Systems, Inc. | Tulsita-Wilcox | Bee | 1 | 28 | 10.3K | Feb 2007 – May 2010 |
| Slick Sand Oil Unit G-2-225825 | Mission River Systems, Inc. | Tulsita-Wilcox | Bee | 1 | 27 | 10.3K | Feb 2007 – May 2010 |
| City of Portland Gas Unit -C- G-4-62844 | Mission River Systems, Inc. | Portland, N. (Commonwealth Serie | San Patricio | 1 | 20 | 22 | Mar 2005 – Mar 2005 |
| Jancik, John Unit G-4-10153 | Mission River Systems, Inc. | Donna (Morin) | Hidalgo | 1 | 12 | 6.39K | Apr 1995 – Apr 1999 |
| Sweeney, J. J. G-4-163757 | Mission River Systems, Inc. | Donna (Armstrong) | Hidalgo | 1 | 8 | 10.8K | Jul 1997 – Oct 1997 |
| Annidrawe, Ilse G-4-120840 | Mission River Systems, Inc. | Cano-Mexico (8550) | Hidalgo | 1 | 0 | 0 | — |
| Heard G-4-88118 | Mission River Systems, Inc. | El Benadito, S.(vicksburg 10600) | Starr | 1 | 0 | 0 | — |
| City of Portland Gas Unit -B- G-4-59125 | Mission River Systems, Inc. | Portland, N. (Commonwealth Serie | San Patricio | 1 | 0 | 0 | — |
| Zola S. Ector G-4-58421 | Mission River Systems, Inc. | Cano-Mexico (7590) | Hidalgo | 1 | 0 | 76.6K | Jan 1993 – Feb 2000 |
| Sweeney, J. J. G-4-50029 | Mission River Systems, Inc. | Alamo (8050) | Hidalgo | 1 | 0 | 0 | — |
| City of Portland Gas Unit C G-4-150615 | Mission River Systems, Inc. | Portland, W. (F-18) | San Patricio | 1 | 0 | 3.78K | Jul 1994 – Sep 1999 |
| Neimann, Emil G-2-943 | Mission River Systems, Inc. | Bonnie View (4200 D-1) | Refugio | 1 | 0 | 163K | Apr 2002 – Jul 2004 |
| Sweeney, J.J. G-4-173890 | Mission River Systems, Inc. | Donna (Rice 6) | Hidalgo | 1 | 0 | 647 | Sep 1999 – Mar 2000 |
| Sweeney, J. J. G-4-9145 | Mission River Systems, Inc. | Alamo (5900) | Hidalgo | 1 | 0 | 0 | — |
| Sweeney, J. J. G-4-178591 | Mission River Systems, Inc. | Alamo (8050) | Hidalgo | 1 | 0 | 0 | — |
| Urbanczyk A#1 G-2-180212 | Mission River Systems, Inc. | Person (Edwards) | Karnes | 1 | 0 | 25.4K | Apr 2000 – Sep 2001 |
| Niemann, Emil G-2-127314 | Mission River Systems, Inc. | Bonnie View (4250) | Refugio | 1 | 0 | 105K | Dec 1993 – Mar 2000 |
| W. T. Wolcott Estate Gas Unit G-4-191983 | Mission River Systems, Inc. | May (4 Sand, Lower) | Kleberg | 1 | 0 | 0 | — |
| Niemann, Emil G-2-127313 | Mission River Systems, Inc. | Bonnie View (F-3950) | Refugio | 1 | 0 | 9.3K | Jan 1993 – Nov 1993 |
| W. T. Wolcott Estate Gas Unit G-4-192686 | Mission River Systems, Inc. | Wildcat | Kleberg | 1 | 0 | 0 | — |
| W. T. Wolcott Estate Gas Unit G-4-192690 | Mission River Systems, Inc. | May (Massive 9) | Kleberg | 1 | 0 | 0 | — |
| W. T. Wolcott Estate Gas Unit G-4-192691 | Mission River Systems, Inc. | May (Massive 3) | Kleberg | 1 | 0 | 0 | — |
| W. T. Wolcott Estate Gas Unit G-4-192692 | Mission River Systems, Inc. | May (Massive 2) | Kleberg | 1 | 0 | 0 | — |
| W. T. Wolcott Estate Gas Unit G-4-192693 | Mission River Systems, Inc. | May (2 Sand, Lower) | Kleberg | 1 | 0 | 0 | — |
| W. T. Wolcott Estate Gas Unit G-4-192698 | Mission River Systems, Inc. | May (5 Sand, Middle) | Kleberg | 1 | 0 | 0 | — |
| W. T. Wolcott Estate Gas Unit G-4-192699 | Mission River Systems, Inc. | Wildcat | Kleberg | 1 | 0 | 0 | — |
| Dolesh, Minta No. 2 G-2-65469 | Mission River Systems, Inc. | Ganado, East (5200) | Jackson | 1 | 0 | 0 | — |
| Roots G-4-225851 | Mission River Systems, Inc. | Plymouth, East (3875) | San Patricio | 1 | 0 | 91.9K | Apr 2007 – Mar 2009 |
| Rea, W. L. G-2-3912 | Mission River Systems, Inc. | Refugio Heard (4500) | Refugio | 1 | 0 | 38.1K | Nov 1993 – Aug 1996 |