| 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 |
| Edgemon, R. P. Unit O-4-11272 | Mission River Systems, Inc. | Mercedes ( 3-M) | Hidalgo | 1 | 18.8K | 295 | Jan 1993 – Jun 2002 |
| Wood, H. C. O-2-71 | Mission River Systems, Inc. | Blanconia, South | Bee | 7 | 13.8K | 992 | Jan 1993 – Jul 1998 |
| Wood, Bernadine O-2-5294 | Mission River Systems, Inc. | Blanconia, South | Bee | 2 | 13.5K | 686 | Jan 1993 – Jun 1998 |
| Rea, W. L. O-2-1369 | Mission River Systems, Inc. | Refugio Heard (Area) | Refugio | 7 | 11.4K | 3.79K | Mar 1993 – Aug 2009 |
| Parker, Molly O-2-3390 | Mission River Systems, Inc. | Caesar, South (Slick) | Bee | 2 | 10.1K | 21 | Jan 1993 – Aug 1997 |
| Wiatrek, A. O-2-7359 | Mission River Systems, Inc. | Davy (Edwards) | Karnes | 1 | 9.59K | 18.2K | Apr 1993 – Nov 2009 |
| Dahl, A. F. O-2-3389 | Mission River Systems, Inc. | Caesar, South (Slick) | Bee | 1 | 5.51K | 34 | Jan 1993 – Dec 2006 |
| Cage G-4-139403 | Mission River Systems, Inc. | Tres Encinos (7390) | Brooks | 1 | 4.44K | 533K | Jan 1993 – Aug 2013 |
| Werland, K. E. O-4-8478 | Mission River Systems, Inc. | Mud Flats, S. (Stark) | Aransas | 2 | 4.42K | 9 | Jan 1993 – Jun 2001 |
| Hill, J. A. O-4-8471 | Mission River Systems, Inc. | Bentonville, S. (Frio Sand) | Jim Wells | 1 | 4.29K | 6.74K | Jan 1993 – Dec 2001 |
| Sweeney, J. J. G-4-190554 | Mission River Systems, Inc. | Donna (8500) | Hidalgo | 1 | 4.03K | 203K | Aug 2002 – Apr 2010 |
| Slick Sand Oil Unit O-2-4558 | Mission River Systems, Inc. | Tulsita (Wilcox) | Bee | 11 | 3.99K | 202K | Jan 1993 – Aug 2007 |
| 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 |
| Kallio, R.J. O-1-12680 | Mission River Systems, Inc. | Pearsall (Austin Chalk) | Dimmit | 2 | 3.26K | 182 | Jan 1993 – Feb 1995 |
| 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 |
| Niemann, Emil O-2-178 | Mission River Systems, Inc. | Bonnie View | Refugio | 6 | 2.39K | 620 | Jan 1993 – Apr 2008 |
| 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 |
| Wood, Vernice C. O-2-5173 | Mission River Systems, Inc. | Blanconia, South | Bee | 2 | 1.77K | 441 | Jan 1993 – Jul 1995 |
| 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 |
| Young, George O-2-6695 | Mission River Systems, Inc. | Cosden, W. (3050 Sand) | Bee | 1 | 275 | 7.56K | Feb 1993 – Apr 2001 |
| Petroquest JV -Elliot G-4-244521 | Mission River Systems, Inc. | Bishop, East (8350) | Nueces | 1 | 257 | 20.7K | Jan 2009 – Apr 2009 |
| Young, George O-2-356 | Mission River Systems, Inc. | Cosden, W. (Hockley Lower B) | Bee | 1 | 217 | 4.68K | Jun 1993 – Jan 2001 |
| Young, George O-2-6359 | Mission River Systems, Inc. | Dirks | Bee | 1 | 123 | 15 | Feb 1993 – Jan 2001 |
| Niemann, Emil O-2-8943 | Mission River Systems, Inc. | Bonnie View (5400) | Refugio | 1 | 100 | 0 | Oct 2004 – Mar 2005 |
| 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 |
| 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 | — |
| Sweeney, J. J. G-4-178591 | Mission River Systems, Inc. | Alamo (8050) | Hidalgo | 1 | 0 | 0 | — |
| Roots G-4-225851 | Mission River Systems, Inc. | Plymouth, East (3875) | San Patricio | 1 | 0 | 91.9K | Apr 2007 – Mar 2009 |
| Sweeney, J.J. G-4-173890 | Mission River Systems, Inc. | Donna (Rice 6) | Hidalgo | 1 | 0 | 647 | Sep 1999 – Mar 2000 |
| Wetherbee, Charles F. Trustee -A O-1-7306 | Mission River Systems, Inc. | Pearsall (Austin Chalk) | La Salle | 1 | 0 | 0 | — |
| Osage-Forster O-1-12475 | Mission River Systems, Inc. | Carlota (Georgetown) | Maverick | 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 |
| Annidrawe, Ilse G-4-120840 | Mission River Systems, Inc. | Cano-Mexico (8550) | Hidalgo | 1 | 0 | 0 | — |