| 372984 | May 7, 1990 | May 7, 1990 | Union Oil Company of California | Gaines | North Riley Unit #258 | 7,613 | 16534158 |
| 372766 | May 2, 1990 | May 2, 1990 | Union Oil Company of California | Andrews | Parker, J.E. -H- #18 | 9,448 | 00333500 |
| 372581 | Apr 25, 1990 | Apr 25, 1990 | Union Oil Company of California | Andrews | Buffalo University #3 | 10,100 | 00336728 |
| 372091 | Apr 12, 1990 | Apr 12, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #1155C | 7,700 | 00336713 |
| 372090 | Apr 12, 1990 | Apr 12, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #9054C | 7,650 | 00336714 |
| 371316 | Mar 22, 1990 | Mar 22, 1990 | Union Oil Company of California | Crockett | Mary B. #1 | 13,000 | 10535796 |
| 370950 | Mar 14, 1990 | Mar 14, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #10110C | 7,660 | 00336696 |
| 370674 | Mar 12, 1990 | Mar 12, 1990 | Union Oil Company of California | Ector | Moss Unit #2413 | 4,690 | 13536207 |
| 370566 | Mar 7, 1990 | Mar 7, 1990 | Union Oil Company of California | Andrews | Parker, J. E. -H- #28 | 9,256 | 00335156 |
| 370483 | Mar 5, 1990 | Mar 5, 1990 | Union Oil Company of California | Gaines | North Riley Unit #129R | 7,350 | 16534141 |
| 370481 | Mar 5, 1990 | Mar 5, 1990 | Union Oil Company of California | Gaines | North Riley Unit #131R | 7,350 | 16534140 |
| 370480 | Mar 5, 1990 | Mar 5, 1990 | Union Oil Company of California | Gaines | North Riley Unit #143R | 7,350 | 16534139 |
| 370292 | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Andrews | University "JC" #1 | 9,923 | 00336683 |
| 370201 | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Ector | Moss Unit #2414 | 4,693 | 13536204 |
| 370200 | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Ector | Moss Unit #2415 | 4,702 | 13536203 |
| 370199 | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Ector | Moss Unit #2417 | 4,693 | 13536202 |
| 370198 | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Ector | Moss Unit #2419 | 4,696 | 13536201 |
| 370198Amendment | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Ector | Moss Unit #2116 | 4,696 | 13536201 |
| 370197 | Feb 28, 1990 | Feb 28, 1990 | Union Oil Company of California | Ector | Moss Unit #2421 | 4,703 | 13536200 |
| 370270 | Feb 27, 1990 | Feb 27, 1990 | Union Oil Company of California | Andrews | University "DD" #1 | 9,670 | 00335627 |
| 370317 | Feb 26, 1990 | Feb 26, 1990 | Union Oil Company of California | Gaines | North Riley Unit #119R | 7,100 | 16534138 |
| 370185 | Feb 23, 1990 | Feb 23, 1990 | Union Oil Company of California | Gaines | North Riley Unit #273 | 7,350 | 16534137 |
| 370061 | Feb 22, 1990 | Feb 22, 1990 | Union Oil Company of California | Andrews | Ford #22 | 9,773 | 00336676 |
| 369911 | Feb 20, 1990 | Feb 20, 1990 | Union Oil Company of California | Pecos | Heiner Estate #2 | 5,200 | 37136227 |
| 369911Amendment | Feb 20, 1990 | Feb 20, 1990 | Union Oil Company of California | Pecos | Heiner Estate #2 | 5,400 | 37136227 |
| 369540 | Feb 15, 1990 | Feb 15, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #3302C | 10,120 | 00304948 |
| 369539 | Feb 15, 1990 | Feb 15, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #2301C | 8,565 | 00303545 |
| 369440 | Feb 7, 1990 | Feb 7, 1990 | Union Oil Company of California | Ector | Holt, O. B. "D" #3 | 5,400 | 13536191 |
| 369440Amendment | Feb 7, 1990 | Feb 7, 1990 | Union Oil Company of California | Ector | Holt, O. B. "D" #3 | 5,400 | 13536191 |
| 369438 | Feb 7, 1990 | Feb 7, 1990 | Union Oil Company of California | Ector | Holt, O. B. "C" #14 | 5,400 | 13536189 |
| 369437 | Feb 7, 1990 | Feb 7, 1990 | Union Oil Company of California | Ector | Holt, O. B. "C" #13 | 5,400 | 13536192 |
| 369439 | Feb 6, 1990 | Feb 6, 1990 | Union Oil Company of California | Ector | Holt, O. B. "C" #15 | 5,400 | 13536190 |
| 369351 | Feb 5, 1990 | Feb 5, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #2994C | 7,850 | 00336643 |
| 369349 | Feb 5, 1990 | Feb 5, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #2783C | 7,700 | 00336644 |
| 369348 | Feb 5, 1990 | Feb 5, 1990 | Union Oil Company of California | Andrews | University GG #1 | 8,800 | 00334456 |
| 369237 | Jan 29, 1990 | Jan 29, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #103 C | 7,850 | 00336641 |
| 368887 | Jan 19, 1990 | Jan 19, 1990 | Union Oil Company of California | Andrews | Dollarhide Unit #1686C | 7,550 | 00336639 |
| 368775 | Jan 17, 1990 | Jan 17, 1990 | Union Oil Company of California | Howard | Union Adams Trust "B" #1 | 9,250 | 22734521 |
| 366304 | Nov 27, 1989 | Nov 27, 1989 | Union Oil Company of California | Andrews | Dollorhide Unit #3504C | 8,481 | 00304861 |
| 366488 | Nov 17, 1989 | Nov 17, 1989 | Union Oil Company of California | Andrews | Parker, J.E. "T" #2 | 9,860 | 00336587 |
| 366487 | Nov 17, 1989 | Nov 17, 1989 | Union Oil Company of California | Andrews | University "JB" #2 | 9,860 | 00336590 |
| 366487Amendment | Nov 17, 1989 | Nov 17, 1989 | Union Oil Company of California | Andrews | University "JB" #2 | 9,860 | 00336590 |
| 366106 | Nov 9, 1989 | Nov 9, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1302D | 8,050 | 00336584 |
| 366105 | Nov 9, 1989 | Nov 9, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1505D | 7,970 | 00336582 |
| 366104 | Nov 9, 1989 | Nov 9, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1504D | 7,880 | 00336583 |
| 365130 | Oct 16, 1989 | Oct 16, 1989 | Union Oil Company of California | Andrews | Parker, J. E. "F" #6 | 9,835 | 00336557 |
| 364888 | Oct 12, 1989 | Oct 12, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #123 | 5,940 | 21935493 |
| 364886 | Oct 12, 1989 | Oct 12, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #124 | 5,940 | 21935492 |
| 364885 | Oct 12, 1989 | Oct 12, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #125 | 5,940 | 21935491 |
| 364884 | Oct 12, 1989 | Oct 12, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #128 | 5,950 | 21935490 |
| 364883 | Oct 12, 1989 | Oct 12, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #129 | 5,940 | 21935489 |
| 364794 | Oct 5, 1989 | Oct 5, 1989 | Union Oil Company of California | Andrews | Ford #20R | 9,815 | 00336551 |
| 364073 | Sep 26, 1989 | Sep 26, 1989 | Union Oil Company of California | Montague | Maddox, J. W. "D" #16 | 1,200 | 33732811 |
| 364072 | Sep 26, 1989 | Sep 26, 1989 | Union Oil Company of California | Montague | Keck, L. "A" #21 | 1,200 | 33732809 |
| 364071 | Sep 26, 1989 | Sep 26, 1989 | Union Oil Company of California | Montague | Keck, L. "A" #22 | 1,200 | 33732810 |
| 364106 | Sep 21, 1989 | Sep 21, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #2003C | 7,710 | 00336523 |
| 364170 | Sep 20, 1989 | Sep 20, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #127 | 5,945 | 21935485 |
| 364169 | Sep 20, 1989 | Sep 20, 1989 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #126 | 5,945 | 21935484 |
| 364107 | Sep 20, 1989 | Sep 20, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #9092C | 7,650 | 00336525 |
| 364105 | Sep 20, 1989 | Sep 20, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #3204C | 7,680 | 00336524 |
| 364104 | Sep 20, 1989 | Sep 20, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #3304C | 7,610 | 00336526 |
| 363708 | Sep 18, 1989 | Sep 18, 1989 | Union Oil Company of California | Borden | Reinecke Unit #227 | 7,000 | 03331418 |
| 363710 | Sep 14, 1989 | Sep 14, 1989 | Union Oil Company of California | Borden | Reinecke Unit #258 | 7,000 | 03331423 |
| 363709 | Sep 14, 1989 | Sep 14, 1989 | Union Oil Company of California | Borden | Reinecke Unit #262 | 7,000 | 03331419 |
| 363709Amendment | Sep 14, 1989 | Sep 14, 1989 | Union Oil Company of California | Borden | Reinecke Unit #262 | 7,000 | 03331419 |
| 363707 | Sep 14, 1989 | Sep 14, 1989 | Union Oil Company of California | Borden | Reinecke Unit #288 | 7,000 | 03331420 |
| 363711 | Sep 13, 1989 | Sep 13, 1989 | Union Oil Company of California | Borden | Reinecke Unit #251 | 7,000 | 03331422 |
| 363706 | Sep 13, 1989 | Sep 13, 1989 | Union Oil Company of California | Borden | Reinecke Unit #226 | 7,000 | 03331421 |
| 363715 | Sep 8, 1989 | Sep 8, 1989 | Union Oil Company of California | Andrews | Ford #20 | 9,815 | 00336502 |
| 363683 | Sep 7, 1989 | Sep 7, 1989 | Union Oil Company of California | Borden | Reinecke Unit #263 | 7,000 | 03331416 |
| 362710 | Aug 14, 1989 | Aug 14, 1989 | Union Oil Company of California | Gaines | North Riley Unit #157R | 7,350 | 16534089 |
| 362709 | Aug 14, 1989 | Aug 14, 1989 | Union Oil Company of California | Gaines | North Riley Unit #151R | 7,350 | 16534088 |
| 362709Amendment | Aug 14, 1989 | Aug 14, 1989 | Union Oil Company of California | Gaines | North Riley Unit #151R | 7,350 | 16534088 |
| 361980 | Aug 8, 1989 | Aug 8, 1989 | Union Oil Company of California | Garza | Stoker, K. et UX "C" #20 | 3,000 | 16932892 |
| 361865 | Jul 26, 1989 | Jul 26, 1989 | Union Oil Company of California | Reeves | Anthony, H. F. #3 | 14,115 | 38910175 |
| 361736 | Jul 25, 1989 | Jul 25, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1353D | 8,150 | 00336436 |
| 361926 | Jul 24, 1989 | Jul 24, 1989 | Union Oil Company of California | Andrews | Parker, J. E. "P" (Amoco) #16 | 9,840 | 00336449 |
| 361409 | Jul 11, 1989 | Jul 11, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1402D | 8,090 | 00336424 |
| 360758 | Jun 23, 1989 | Jun 23, 1989 | Union Oil Company of California | Andrews | Parker, J.E. "N" #3 | 9,835 | 00336407 |
| 360372 | Jun 15, 1989 | Jun 15, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1301D | 8,060 | 00336399 |
| 360354 | Jun 12, 1989 | Jun 12, 1989 | Union Oil Company of California | Andrews | Dollardhide Unit #2501S | 8,600 | 00336394 |
| 360179 | Jun 8, 1989 | Jun 8, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #3408C | 7,800 | 00336391 |
| 360178 | Jun 8, 1989 | Jun 8, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #3214C | 7,800 | 00336390 |
| 360177 | Jun 8, 1989 | Jun 8, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1102D | 8,300 | 00336389 |
| 360176 | Jun 8, 1989 | Jun 8, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #1001D | 8,200 | 00336388 |
| 360175 | Jun 8, 1989 | Jun 8, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #3215C | 7,800 | 00336387 |
| 360180 | Jun 7, 1989 | Jun 7, 1989 | Union Oil Company of California | Andrews | Dollarhide Unit #802D | 8,100 | 00336386 |
| 359768 | May 30, 1989 | May 30, 1989 | Union Oil Company of California | Andrews | University "JF" #1 | 10,045 | 00336381 |
| 357703 | Apr 4, 1989 | Apr 4, 1989 | Union Oil Company of California | Borden | Reinecke Unit #237 | 7,000 | 03331401 |
| 357702 | Apr 4, 1989 | Apr 4, 1989 | Union Oil Company of California | Borden | Reinecke Unit #217 | 7,000 | 03331400 |
| 357701 | Apr 4, 1989 | Apr 4, 1989 | Union Oil Company of California | Borden | Reinecke Unit #214 | 7,000 | 03331399 |
| 357700 | Apr 4, 1989 | Apr 4, 1989 | Union Oil Company of California | Borden | Reinecke Unit #216 | 7,000 | 03331398 |
| 357699 | Apr 4, 1989 | Apr 4, 1989 | Union Oil Company of California | Borden | Reinecke Unit #213 | 7,000 | 03331397 |
| 357612 | Apr 4, 1989 | Apr 4, 1989 | Union Oil Company of California | Andrews | University "JA" #1 | 9,900 | 00336354 |
| 357435 | Mar 27, 1989 | Mar 27, 1989 | Union Oil Company of California | Borden | Reinecke Unit #222 | 7,000 | 03331396 |
| 357434 | Mar 27, 1989 | Mar 27, 1989 | Union Oil Company of California | Borden | Reinecke Unit #223 | 7,000 | 03331395 |
| 357433 | Mar 27, 1989 | Mar 27, 1989 | Union Oil Company of California | Borden | Reinecke Unit #235 | 7,000 | 03331394 |
| 357432 | Mar 27, 1989 | Mar 27, 1989 | Union Oil Company of California | Borden | Reinecke Unit #241 | 7,000 | 03331393 |
| 357431 | Mar 27, 1989 | Mar 27, 1989 | Union Oil Company of California | Borden | Reinecke Unit #242 | 7,000 | 03331392 |
| 357153 | Mar 20, 1989 | Mar 20, 1989 | Union Oil Company of California | Andrews | Ford #21 | 9,870 | 00336347 |