| Slick T. B. Est. a 485 #20442-427-33706 | Houston Exploration Company The | StarrRincon (Vicksburg Cons.) | PluggedGas | 8,200 | Feb 17, 2006 | 2 | Jun 2007 |
| Guerra D.V. Trust #242-215-33257 | Houston Exploration Company The | HidalgoWildcat | PluggedGas | 12,700 | Sep 20, 2004 | 1 | — |
| Leonardo Gutierrez G. U. 2 #142-505-34848 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Oct 14, 2003 | 1 | — |
| Gutierrez J. M. #1642-505-34847 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,700 | Oct 7, 2003 | 1 | — |
| D. Ramirez Gas Unit #142-505-34766 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,000 | Jun 23, 2003 | 1 | — |
| Bruni Mineral Trust D #342-505-34715 | Houston Exploration Company The | ZapataLa Perla (Lobo Cons.) | PluggedGas | 11,500 | Apr 15, 2003 | 1 | — |
| Leonardo #3742-505-34694 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Apr 14, 2003 | 1 | — |
| Leonardo #3542-505-34684 | Houston Exploration Company The | ZapataRamirez (Lobo) | PluggedGas | 13,500 | Mar 6, 2003 | 1 | — |
| Flores L. G. #3642-505-34555 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 14,500 | Jun 6, 2002 | 1 | — |
| Hubberd William T #4242-479-38044 | Houston Exploration Company The | WebbWildcat | PluggedGas | 8,800 | Feb 1, 2002 | 1 | — |
| Gutierrez J. M. #1442-505-34479 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Jan 23, 2002 | 1 | — |
| Leonardo #3342-505-34472 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Jan 3, 2002 | 1 | — |
| Asche #6442-505-34389 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,700 | Jul 30, 2001 | 1 | — |
| Ramirez Mineral Trust a #242-505-34375 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 9,500 | Jun 25, 2001 | 1 | — |
| Asche #5542-505-34276 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,800 | Jan 17, 2001 | 1 | — |
| Leonardo #2942-505-34277 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 13,500 | Jan 17, 2001 | 1 | — |
| Ramirez Abel #542-505-34216 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 9,500 | Sep 21, 2000 | 1 | — |
| Gutierrez J. M. #1042-505-34150 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Jun 9, 2000 | 1 | — |
| Haynes #1742-505-34096 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 12,000 | Mar 3, 2000 | 1 | — |
| Asche #4542-505-34073 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,700 | Jan 24, 2000 | 1 | — |
| Garza L. Estate of et al #242-505-33944 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 14,700 | May 18, 1999 | 1 | — |
| Leonardo #2042-505-33860 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,200 | Sep 29, 1998 | 1 | — |
| Flores L. G. #2042-505-33787 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 11,700 | Apr 7, 1998 | 1 | — |
| Leonardo #1642-505-33705 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Nov 12, 1997 | 1 | — |
| Leonardo #1742-505-33706 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,400 | Nov 12, 1997 | 1 | — |
| Garza A. #742-505-33667 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,500 | Aug 26, 1997 | 1 | — |
| R.M.T. #542-505-33648 | Houston Exploration Company The | ZapataCharco (9200) | PluggedGas | 10,000 | Jul 11, 1997 | 1 | Mar 2006 |
| Flores M. #442-505-33574 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 10,000 | Mar 10, 1997 | 1 | — |
| Diamantina #142-505-33557 | Houston Exploration Company The | ZapataFlores W. (Perdido) | PluggedGas | 10,000 | Feb 10, 1997 | 2 | Sep 2005 |
| Villarreal Gutierrez Gas Unit #142-505-33519 | Houston Exploration Company The | ZapataLas Lomas (Wilcox 7800) | PluggedGas | 8,500 | Nov 26, 1996 | 1 | Dec 2004 |
| LFT #642-505-33520 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 14,500 | Nov 26, 1996 | 1 | — |
| Mendoza #142-505-33511 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 8,800 | Nov 12, 1996 | 1 | — |
| Asche #442-505-31427 | Houston Exploration Company The | ZapataCharco (9900) | PluggedGas | 10,500 | Sep 26, 1995 | 2 | Sep 2000 |
| Cuellar J.V. #642-505-33305 | Houston Exploration Company The | ZapataWildcat | PluggedGas | 8,700 | Apr 21, 1995 | 2 | — |
| Asche #2642-505-33196 | Houston Exploration Company The | ZapataCharco (9900) | PluggedGas | 10,600 | May 12, 1994 | 1 | Sep 2000 |
| L.F.T. #542-505-32902 | Houston Exploration Company The | ZapataMunoz (Lobo) | PluggedGas | 14,500 | Jul 28, 1992 | 3 | Jul 1997 |
| Asche #2242-505-32812 | Houston Exploration Company The | ZapataHaynes (Middle Wilcox Cons.) | PluggedGas | 11,700 | Jul 26, 1991 | 1 | Jun 1999 |
| Flores L. G. #1042-505-32701 | Houston Exploration Company The | ZapataHaynes (Middle Wilcox Cons.) | PluggedGas | 11,500 | Jul 5, 1990 | 1 | May 1993 |
| J.O.D. #242-505-32500 | Houston Exploration Company The | ZapataEl Huerfano (10800) | PluggedGas | 11,700 | Nov 16, 1988 | 1 | Oct 1996 |
| L.F.T. #142-505-32366 | Houston Exploration Company The | ZapataEl Huerfano (10800) | PluggedGas | 12,000 | Sep 4, 1987 | 1 | Apr 1997 |
| Leonardo #1042-505-32307 | Houston Exploration Company The | ZapataCharco (9200) | PluggedGas | 10,500 | Apr 6, 1987 | 1 | Feb 1999 |
| Leonardo #842-505-32194 | Houston Exploration Company The | ZapataCharco (9200) | PluggedGas | 10,500 | Apr 23, 1986 | 1 | Apr 1998 |
| Garza L. #142-505-31809 | Houston Exploration Company The | ZapataCharco (9900) | PluggedGas | 10,600 | May 3, 1984 | 1 | — |
| Garza L. #342-505-31716 | Houston Exploration Company The | ZapataCharco (9400) | PluggedGas | 11,000 | Sep 6, 1983 | 1 | — |
| Alfonso #242-505-31426 | Houston Exploration Company The | ZapataCharco (9900) | PluggedGas | 10,700 | Nov 6, 1981 | 1 | — |
| Asche #342-505-31389 | Houston Exploration Company The | ZapataCharco (9400) | PluggedGas | 10,700 | Jul 10, 1981 | 1 | — |
| Ramirez Gas Unit J.E. #142-479-31539 | Houston Exploration Company The | WebbWildcat | PluggedOil | — | — | 0 | — |