| Prentice Northeast Unit #26042-445-31464 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,000 | May 20, 1987 | — | — |
| Prentice Northeast Unit #26642-445-31465 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 6,794 | May 20, 1987 | — | — |
| Prentice Northeast Unit #26742-445-31466 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,000 | May 20, 1987 | — | — |
| Prentice Northeast Unit #32A42-445-31467 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,000 | May 20, 1987 | — | — |
| Prentice Northeast Unit #25942-445-31468 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 6,740 | May 20, 1987 | — | — |
| Prentice Northeast Unit #26142-445-31469 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,000 | May 20, 1987 | — | — |
| Conroe Field Unit #208142-339-30768 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,200 | Apr 23, 1987 | — | — |
| Roberts/Miller-Holloway G.U. #142-213-30596 | Highmark Energy Operating LLC | Henderson, TXSand Trap (James Lime) | PluggedGas | 11,560 | Mar 24, 1987 | — | — |
| Conroe Field Unit #195242-339-30766 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,323 | Feb 11, 1987 | — | — |
| Conroe Field Unit #100242-339-00582 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,133 | Dec 17, 1986 | — | — |
| Conroe Field Unit #211642-339-30762 | Highmark Energy Operating LLC | Montgomery, TXConroe | Shut inOil | 5,200 | Dec 5, 1986 | — | — |
| Conroe Field Unit #200542-339-01497 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,071 | Nov 26, 1986 | — | — |
| Conroe Field Unit #101642-339-30644 | Highmark Energy Operating LLC | Montgomery, TXConroe | Shut inOil | 5,110 | Sep 16, 1986 | — | — |
| Stringfield Tommye #142-213-30566 | Highmark Energy Operating LLC | Henderson, TXSand Trap (James Lime) | ActiveGas | 11,000 | Aug 1, 1986 | — | — |
| Prentice Northeast Unit #20242-445-31432 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 8,300 | Jul 8, 1986 | — | — |
| Conroe Field Unit #1920D42-339-01481 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveInjection | 5,164 | May 29, 1986 | — | — |
| Conroe Field Unit #370942-339-01894 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,101 | May 15, 1986 | — | — |
| Conroe Field Unit #4215A42-339-00555 | Highmark Energy Operating LLC | Montgomery, TXConroe | Shut inOil | 5,119 | May 5, 1986 | — | — |
| Shell-Perkins #942-003-35530 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Penn.) | Shut inOil | 9,400 | Mar 27, 1986 | — | — |
| Conroe Field Unit #71842-339-30753 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,120 | Feb 28, 1986 | — | — |
| Conroe Field Unit #194942-339-30751 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,302 | Feb 19, 1986 | — | — |
| Conroe Field Unit #195142-339-30750 | Highmark Energy Operating LLC | Montgomery, TXConroe | Shut inOil | 5,195 | Feb 14, 1986 | — | — |
| Conroe Field Unit #172042-339-30749 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,051 | Feb 11, 1986 | — | — |
| Wooten H. O. #142-501-33027 | Highmark Energy Operating LLC | Yoakum, TXWasson 72 | Shut inOil | 7,627 | Feb 10, 1986 | — | — |
| Conroe Field Unit #163142-339-30748 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,050 | Feb 5, 1986 | — | — |
| Conroe Field Unit #163042-339-30745 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,200 | Jan 9, 1986 | — | — |
| Prentice Northeast Unit #3A42-445-31413 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 6,915 | Dec 17, 1985 | — | — |
| Prentice Northeast Unit #138A42-445-31414 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 6,927 | Dec 17, 1985 | — | — |
| Prentice Northeast Unit #25742-445-31415 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 6,895 | Dec 17, 1985 | — | — |
| Prentice Northeast Unit #2A42-445-31410 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveInjection | 6,904 | Dec 9, 1985 | — | — |
| Prentice Northeast Unit #25842-445-31411 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 6,885 | Dec 9, 1985 | — | — |
| King E. F. #7W42-003-35337 | Highmark Energy Operating LLC | Andrews, TXFuhrman-Mascho | Shut inOil | 4,474 | Dec 6, 1985 | — | — |
| Davis L. T. #9W42-003-35279 | Highmark Energy Operating LLC | Andrews, TXFuhrman-Mascho | Shut inOil | 4,474 | Nov 1, 1985 | — | — |
| University 154 #13W42-003-05377 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Ellenburger) | Shut inOil | 11,805 | Oct 28, 1985 | — | — |
| Conroe Field Unit #202842-339-01660 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,133 | Aug 13, 1985 | — | — |
| Conroe Field Unit #272342-339-30727 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,180 | Jun 24, 1985 | — | — |
| Prentice Northeast Unit #20942-445-31377 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,026 | Jun 6, 1985 | — | — |
| Prentice Northeast Unit #20842-445-31376 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 6,998 | Jun 3, 1985 | — | — |
| Prentice Northeast Unit #22642-445-31375 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 6,865 | May 31, 1985 | — | — |
| Conroe Field Unit #200842-339-01504 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,123 | May 30, 1985 | — | — |
| Conroe Field Unit #202742-339-01659 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,131 | May 30, 1985 | — | — |
| Conroe Field Unit #97D42-339-30719 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveInjection | 5,110 | May 30, 1985 | — | — |
| Conroe Field Unit #62342-339-30718 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,219 | May 22, 1985 | — | — |
| Prentice Northeast Unit #24942-445-31374 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | PluggedOil | 7,000 | May 15, 1985 | — | — |
| Prentice Northeast Unit #23242-445-31373 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 6,886 | May 13, 1985 | — | — |
| Parker Harry #342-295-31628 | Highmark Energy Operating LLC | Lipscomb, TXParker (Morrow D-1) | ActiveGas | 10,300 | May 7, 1985 | — | — |
| Prentice Northeast Unit #19642-445-31371 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 6,867 | May 6, 1985 | — | — |
| Conroe Field Unit #205242-339-01344 | Highmark Energy Operating LLC | Montgomery, TXConroe | PluggedOil | 5,133 | May 3, 1985 | — | — |
| Prentice Northeast Unit #21742-445-31369 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 6,879 | May 2, 1985 | — | — |
| Prentice Northeast Unit #18942-445-31341 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 6,868 | Apr 29, 1985 | — | — |