| Lecour Joe L. Jr #1X42-051-31091 | Union Pacific Resources Company | BurlesonGiddings (Austin Chalk-3) | PluggedOil | 8,900 | Aug 13, 1998 | 3 | — |
| Murski Unit #1HZ42-477-30863 | Union Pacific Resources Company | WashingtonGiddings (Austin Chalk-3) | PluggedOil | 15,750 | May 5, 1998 | 1 | — |
| Tooker Unit #1HZ42-477-30862 | Union Pacific Resources Company | WashingtonGiddings (Austin Chalk-3) | PluggedOil | 16,500 | Apr 30, 1998 | 1 | — |
| Riggs 19 #142-105-38118 | Union Pacific Resources Company | CrockettDavidson Ranch (Penn. 7890) | PluggedGas | 10,000 | Apr 8, 1998 | 2 | — |
| Schulz Unit #1HZ42-015-30710 | Union Pacific Resources Company | AustinGiddings (Austin Chalk-3) | PluggedOil | 16,000 | Apr 6, 1998 | 1 | — |
| Ptarmigan Unit #1HZ42-289-31282 | Union Pacific Resources Company | LeonGiddings (Austin Chalk-3) | PluggedOil | 7,000 | Dec 19, 1997 | 1 | — |
| Blue Unit #1HZ42-289-31278 | Union Pacific Resources Company | LeonGiddings (Austin Chalk-3) | PluggedOil | 7,200 | Oct 31, 1997 | 1 | — |
| Long Unit #1HZ42-285-32539 | Union Pacific Resources Company | LavacaGiddings (Austin Chalk-1) | PluggedOil | 17,000 | Oct 2, 1997 | 1 | — |
| University 39-19 #1D42-105-37798 | Union Pacific Resources Company | CrockettBlock 39-B (Ellen) | PluggedGas | 8,600 | Jul 29, 1997 | 1 | — |
| Sellers W. S. B #742-355-33092 | Union Pacific Resources Company | NuecesStratton (Consolidated) | PluggedGas | 7,700 | Jul 23, 1997 | 1 | — |
| Powell 6 #1HHZ42-413-32008 | Union Pacific Resources Company | SchleicherTillery Southwest (Strawn) | PluggedGas | 5,000 | Jul 23, 1997 | 1 | — |
| Wardner G. P. #25942-355-33082 | Union Pacific Resources Company | NuecesStratton (Consolidated) | PluggedGas | 7,900 | Jun 24, 1997 | 1 | — |
| West #242-127-33106 | Union Pacific Resources Company | DimmitHugh Fitzsimons (Olmos) | PluggedOil | 4,000 | Apr 2, 1997 | 1 | — |
| West #342-127-33107 | Union Pacific Resources Company | DimmitHugh Fitzsimons (Olmos) | PluggedOil | 4,000 | Apr 2, 1997 | 1 | — |
| Housen Bay Unit #1HZ42-403-30424 | Union Pacific Resources Company | SabineBrookeland (Austin Chalk 8800) | PluggedGas | 6,922 | Jul 16, 1996 | 2 | — |
| Schatz Unit #1HZ42-477-30820 | Union Pacific Resources Company | WashingtonGiddings (Austin Chalk Gas) | PluggedGas | 15,000 | May 3, 1996 | 2 | — |
| Olbrich Unit #1HZ42-285-32331 | Union Pacific Resources Company | LavacaWildcat | PluggedOil | 14,000 | Oct 3, 1995 | 3 | — |
| Fling Point #1HHZ42-403-30374 | Union Pacific Resources Company | SabineBrookeland (Austin Chalk 8800) | PluggedGas | 6,922 | Jun 21, 1994 | 2 | — |
| Tauber #1HZ42-041-31822 | Union Pacific Resources Company | BrazosGiddings (Austin Chalk-3) | PluggedOil | 8,100 | Jun 9, 1994 | 1 | — |
| Carter W. T. Unit a-36 #1HZ42-457-30477 | Union Pacific Resources Company | TylerBrookeland (Austin Chalk 8800) | PluggedOil | 13,400 | Feb 24, 1994 | 1 | — |
| Dallmeyer-Maysel Unit #1HZ42-477-30718 | Union Pacific Resources Company | WashingtonGiddings (Austin Chalk-3) | PluggedOil | 12,000 | Jul 15, 1993 | 1 | — |
| Kipp Eddie #1 AHZ42-287-31505 | Union Pacific Resources Company | LeeGiddings (Austin Chalk-3) | PluggedOil | 14,000 | Jun 25, 1993 | 2 | — |
| Lehmann-Holm Unit #1HHZ42-149-32569 | Union Pacific Resources Company | FayetteGiddings (Austin Chalk-3) | PluggedOil | 16,000 | Feb 9, 1993 | 2 | — |
| Duke #1HZ42-493-32369 | Union Pacific Resources Company | WilsonWildcat | PluggedOil | 3,700 | Nov 20, 1992 | 2 | — |
| Yturri #1HZ42-029-38180 | Union Pacific Resources Company | BexarWildcat | PluggedOil | 2,700 | Oct 16, 1992 | 2 | — |
| Burkhardt #1HZ42-029-38181 | Union Pacific Resources Company | BexarWildcat | PluggedOil | 2,400 | Oct 16, 1992 | 2 | — |
| Hahn-Janda Unit #1HZ42-149-32671 | Union Pacific Resources Company | FayetteGiddings (Austin Chalk-3) | PluggedOil | 12,500 | Jul 29, 1992 | 1 | — |
| Arco a-246 SWD #1D42-241-30514 | Union Pacific Resources Company | JasperBrookeland (Austin Chalk 8800) | PluggedOil | 6,000 | Feb 21, 1992 | 1 | — |
| Arco a-1008 SWD #1D42-351-30537 | Union Pacific Resources Company | NewtonBrookeland (Austin Chalk 8800) | PluggedOil | 5,700 | Feb 21, 1992 | 1 | — |
| Arco-Vastar Unit a-658 #1HZ42-241-30512 | Union Pacific Resources Company | JasperBrookeland (Austin Chalk 8800) | PluggedOil | 13,500 | Dec 13, 1991 | 1 | — |
| Mullins Don #h 1HZ42-149-32546 | Union Pacific Resources Company | FayetteGiddings (Austin Chalk-3) | PluggedOil | 13,000 | Nov 25, 1991 | 1 | — |
| Appleby-Fietsam Unit #1HZ42-149-32532 | Union Pacific Resources Company | FayetteGiddings (Austin Chalk-3) | PluggedOil | 14,000 | Oct 28, 1991 | 1 | — |
| Palasota Peters Unit #1HZ42-041-31468 | Union Pacific Resources Company | BrazosGiddings (Austin Chalk-3) | PluggedOil | 14,000 | Oct 8, 1991 | 3 | — |
| Bozka-Bozka Unit #1HZ42-177-31946 | Union Pacific Resources Company | GonzalesPeach Creek (Austin Chalk) | PluggedOil | 16,300 | Aug 28, 1991 | 2 | — |
| Austin-Whyburn Unit #1HZ42-177-31939 | Union Pacific Resources Company | GonzalesChristian (6800) | PluggedOil | 15,000 | Aug 1, 1991 | 2 | — |
| Hinton-Hinton Unit #1HZ42-177-31935 | Union Pacific Resources Company | GonzalesChristian (6800) | PluggedOil | 15,500 | Jul 3, 1991 | 1 | — |
| Renfro-McMillan Unit #1HZ42-177-31933 | Union Pacific Resources Company | GonzalesPeach Creek (Austin Chalk) | PluggedOil | 13,000 | Jun 28, 1991 | 2 | — |
| Wardner G.P. #7642-355-05318 | Union Pacific Resources Company | NuecesStratton (Consolidated) | PluggedGas | 7,710 | Apr 29, 1991 | 1 | — |
| Borchers Trust #2HZ42-177-31904 | Union Pacific Resources Company | GonzalesPeach Creek (Austin Chalk) | PluggedOil | 12,000 | Apr 25, 1991 | 2 | — |
| Arco-Vastar Unit a-183 #1HZ42-351-30516 | Union Pacific Resources Company | NewtonBrookeland (Austin Chalk 8800) | PluggedOil | 12,500 | Jan 16, 1991 | 2 | — |
| Longhorn Unit #1HZ42-041-31478 | Union Pacific Resources Company | BrazosKurten (Buda) | PluggedOil | 13,500 | Jan 10, 1991 | 1 | — |
| Crowley Timothy #1HZ42-041-31472 | Union Pacific Resources Company | BrazosGiddings (Austin Chalk-3) | PluggedOil | 14,400 | Nov 27, 1990 | 2 | — |
| Berry-Gouger #1HZ42-163-32900 | Union Pacific Resources Company | FrioPearsall (Austin Chalk) | PluggedOil | 7,850 | Oct 25, 1990 | 1 | — |
| McFaddin -B- #2542-469-32747 | Union Pacific Resources Company | VictoriaKay Creek (5970) | PluggedOil | 6,980 | Oct 17, 1990 | 5 | — |
| Borchers Trust #1HZ42-177-31806 | Union Pacific Resources Company | GonzalesPeach Creek (Austin Chalk) | PluggedOil | 11,000 | Sep 7, 1990 | 1 | — |
| McFaddin -B- #11 C42-469-01557 | Union Pacific Resources Company | VictoriaMcFaddin (2000) | PluggedGas | 3,436 | Sep 6, 1990 | 1 | — |
| McFaddin -a- #1342-469-31588 | Union Pacific Resources Company | VictoriaKay Creek (5800) | PluggedGas | 7,000 | Jul 30, 1990 | 4 | — |
| Gouger #1HZ42-163-32785 | Union Pacific Resources Company | FrioPearsall (Austin Chalk) | PluggedOil | 6,900 | Jul 20, 1990 | 1 | — |
| McFaddin -B- #19-D42-469-32565 | Union Pacific Resources Company | VictoriaWildcat | PluggedGas | 3,900 | Jul 17, 1990 | 4 | — |
| Butts J.B. #142-355-05332 | Union Pacific Resources Company | NuecesStratton (Consolidated) | PluggedGas | 6,262 | Jun 25, 1990 | 2 | — |