| J. M. O Brien a #942-391-32649 | Greta Operating Company LLC | Refugio, TXGreta (4850) | ActiveGas | 6,300 | Sep 11, 2024 | — | — |
| O'Connor B #2HHZ42-391-33286 | Greta Operating Company LLC | Refugio, TX | Not on schedule | 4,600 | Nov 10, 2022 | — | — |
| O Connor #1HHZ42-391-33267 | Greta Operating Company LLC | Refugio, TXGreta (4400) | ActiveOil | 4,324 | May 10, 2022 | — | — |
| JFB Heard - Htex #1H #1HHZ42-391-33209 | Greta Operating Company LLC | Refugio, TXGreta (4400) | ActiveOil | 4,542 | Jul 9, 2019 | — | — |
| JFB Heard - Htex #2H #2HHZ42-391-33210 | Greta Operating Company LLC | Refugio, TXGreta (4400) | ActiveOil | 4,398 | Jul 9, 2019 | — | — |
| Thomas O Connor #1742-391-33151 | Greta Operating Company LLC | Refugio, TXGreta (3490) | ActiveGas | 6,328 | Feb 15, 2018 | — | — |
| J.M. O Brien J #642-391-32721 | Greta Operating Company LLC | Refugio, TXGreta (4400) | Shut inOil | 6,300 | Nov 13, 2015 | — | — |
| Thomas O Connor #1642-391-33128 | Greta Operating Company LLC | Refugio, TXGreta Deep (5600) | ActiveOil | 6,300 | Nov 12, 2014 | — | — |
| J.F.B. Heard-Arco #342-391-31179 | Greta Operating Company LLC | Refugio, TXGreta (4400) | ActiveOil | 6,250 | Oct 7, 2014 | — | — |
| Thomas O Connor #1542-391-33110 | Greta Operating Company LLC | Refugio, TXGreta (6400) | Shut inOil | 6,300 | Jun 24, 2014 | — | — |
| Tom O Connor #1042-391-30334 | Greta Operating Company LLC | Refugio, TXGreta Deep (5850) | Shut inOil | 5,900 | Feb 9, 2011 | — | — |
| J. J. O Brien #b 842-391-32971 | Greta Operating Company LLC | Refugio, TXGreta (5780) | ActiveGas | 6,300 | Nov 12, 2010 | — | — |
| O Brien J. M. E #642-391-32757 | Greta Operating Company LLC | Refugio, TXGreta W. (6300) | ActiveGas | 6,500 | Feb 15, 2007 | — | — |
| F.V.W. Heard #642-391-30594 | Greta Operating Company LLC | Refugio, TXGreta (0-5-B) | PluggedGas | 6,503 | Aug 2, 2005 | — | — |
| FVW Heard #342-391-00943 | Greta Operating Company LLC | Refugio, TXGreta (F-3 West) | Temporarily abandonedGas | 5,930 | Oct 12, 2004 | — | — |
| O Connor Thomas #1442-391-32452 | Greta Operating Company LLC | Refugio, TXGreta Deep (5700) | Shut inOil | 6,400 | Sep 30, 2003 | — | — |
| O Connor Thomas (Amoco) #242-391-00973 | Greta Operating Company LLC | Refugio, TXGreta (5270) | Temporarily abandonedGas | 6,100 | Aug 20, 2003 | — | — |
| Heard F. V. W. #742-391-32473 | Greta Operating Company LLC | Refugio, TXGreta Deep (5400) | ActiveOil | 6,010 | Jul 7, 2003 | — | — |
| O Brien J. M. #d 642-391-32488 | Greta Operating Company LLC | Refugio, TXGreta (O-3) | PluggedGas | 6,500 | Oct 28, 2002 | — | — |
| O Brien J. J. a #942-391-30261 | Greta Operating Company LLC | Refugio, TXGreta (F-1 West) | PluggedGas | 7,981 | Oct 23, 2002 | — | — |
| O Brien J. J. #c 442-391-30262 | Greta Operating Company LLC | Refugio, TXGreta (5800) | ActiveOil | 6,500 | Jun 14, 2002 | — | — |
| O Brien J.M. D&e E #142-391-00929 | Greta Operating Company LLC | Refugio, TXGreta (L-15) | PluggedGas | 4,080 | Jul 10, 2001 | — | — |
| O Brien J. J. #642-391-30376 | Greta Operating Company LLC | Refugio, TXGreta (L-10) | Temporarily abandonedGas | 6,516 | Mar 22, 2000 | — | — |
| Heard J. F. B. - Tex #942-391-00898 | Greta Operating Company LLC | Refugio, TXGreta (L-13) | ActiveGas | 5,235 | Mar 10, 2000 | — | — |
| Heard-Tex #242-391-00891 | Greta Operating Company LLC | Refugio, TXGreta (O-1) | Temporarily abandonedGas | 4,447 | Oct 12, 1999 | — | — |
| O Brien J. M. -a- #342-391-00881 | Greta Operating Company LLC | Refugio, TXGreta (C-1) | ActiveGas | 4,383 | Aug 31, 1999 | — | — |
| O Brien J. M. B #242-391-01032 | Greta Operating Company LLC | Refugio, TXGreta (C-5) | Temporarily abandonedGas | 4,380 | Oct 18, 1996 | — | — |
| O Brien J. J. A(s) #642-391-00787 | Greta Operating Company LLC | Refugio, TXGreta (L- 8) | PluggedGas | 2,550 | Jul 18, 1996 | — | — |
| O Brien J. M. C #742-391-30400 | Greta Operating Company LLC | Refugio, TXGreta (L- 5) | PluggedGas | 4,300 | Apr 9, 1996 | — | — |
| O Brien J. J. a #642-391-00779 | Greta Operating Company LLC | Refugio, TXGreta (L- 6 West) | PluggedGas | 3,030 | Jan 29, 1996 | — | — |
| O Brien J.J. a (S) #842-391-30338 | Greta Operating Company LLC | Refugio, TXGreta (L- 9) | PluggedGas | 4,001 | Nov 6, 1995 | — | — |
| O Brien J.M. B #6-T42-391-00887 | Greta Operating Company LLC | Refugio, TXGreta (O-3) | PluggedGas | 4,384 | Apr 19, 1995 | — | — |
| O Connor Tom #1142-391-30362 | Greta Operating Company LLC | Refugio, TXGreta (L- 3) | ActiveGas | 4,615 | May 2, 1994 | — | — |
| Obrien J. J. -a- #542-391-00817 | Greta Operating Company LLC | Refugio, TXGreta (4400) | ActiveInjection | 5,930 | Apr 21, 1994 | — | — |
| O Brien J.M. a #742-391-31158 | Greta Operating Company LLC | Refugio, TXGreta (O-3) | Temporarily abandonedGas | 4,506 | Dec 16, 1993 | — | — |
| O Brien J. J. a #242-391-00777 | Greta Operating Company LLC | Refugio, TXGreta (L- 3) | PluggedGas | 2,380 | Dec 10, 1993 | — | — |
| O Connor Tom #1342-391-31417 | Greta Operating Company LLC | Refugio, TXGreta (O-7) | Temporarily abandonedGas | 5,938 | Nov 17, 1993 | — | — |
| O Brien J.M. D #242-391-00918 | Greta Operating Company LLC | Refugio, TXGreta (O-5) | PluggedGas | 3,580 | Nov 10, 1993 | — | — |
| Heard J. F. B. #5 A42-391-00904 | Greta Operating Company LLC | Refugio, TXGreta (C-5) | ActiveGas | 4,416 | Jun 9, 1993 | — | — |
| O Brien J.M. J&L L #142-391-00971 | Greta Operating Company LLC | Refugio, TXGreta (L- 5) | PluggedGas | 4,482 | Jun 9, 1993 | — | — |
| Heard J. F. B. #1742-391-00902 | Greta Operating Company LLC | Refugio, TXGreta (C-1) | Temporarily abandonedGas | 5,180 | May 11, 1993 | — | — |
| O Brien J. B. B #4 I42-391-30284 | Greta Operating Company LLC | Refugio, TXGreta (O-1) | PluggedGas | 3,512 | Dec 22, 1992 | — | — |
| O Brien J. J. a (S) #742-391-30237 | Greta Operating Company LLC | Refugio, TXGreta (O-1) | PluggedGas | 6,500 | Nov 19, 1992 | — | — |
| O Brien B (S) J.M. #242-391-82070 | Greta Operating Company LLC | Refugio, TXGreta (L- 5) | PluggedGas | 2,680 | Sep 9, 1992 | — | — |
| O Connor Tom #242-391-00925 | Greta Operating Company LLC | Refugio, TXGreta (L- 2) | Temporarily abandonedGas | 4,396 | Aug 13, 1992 | — | — |
| O Brien J.M. C #142-391-00990 | Greta Operating Company LLC | Refugio, TXGreta (L- 5) | PluggedGas | 2,450 | Apr 28, 1992 | — | — |
| O Brien J.M. a-2 #242-391-00884 | Greta Operating Company LLC | Refugio, TXGreta (L- 2) | PluggedGas | 2,400 | Apr 2, 1992 | — | — |
| O Brien J.M. D&e D #342-391-00938 | Greta Operating Company LLC | Refugio, TXGreta (L- 6 West) | PluggedGas | 4,391 | Mar 18, 1992 | — | — |
| O Brien J.J. B #242-391-00914 | Greta Operating Company LLC | Refugio, TXGreta (2460) | ActiveGas | 4,398 | Jan 28, 1991 | — | — |
| O Brien J. J. C (P) #242-391-80922 | Greta Operating Company LLC | Refugio, TXGreta (L- 5) | Temporarily abandonedGas | 4,400 | Dec 7, 1990 | — | — |