| 330495 | May 19, 1987 | May 19, 1987 | Union Oil Company of California | Sterling | Foster, W. L. Jr. "B" #22 | 3,000 | 43131847 |
| 330494 | May 19, 1987 | May 19, 1987 | Union Oil Company of California | Sterling | Foster, W. L. Jr. "B" #21 | 3,000 | 43131846 |
| 330493 | May 19, 1987 | May 19, 1987 | Union Oil Company of California | Sterling | Foster, W. L. Jr. "B" #23 | 3,000 | 43131845 |
| 329104 | Apr 17, 1987 | Apr 17, 1987 | Union Oil Company of California | Howard | Wolfe, Freeburg #1 | 10,550 | 22734159 |
| 329100 | Apr 17, 1987 | Apr 17, 1987 | Union Oil Company of California | Howard | Evans Trust #1 | 10,750 | 22734073 |
| 328988 | Apr 13, 1987 | Apr 13, 1987 | Union Oil Company of California | Andrews | Parker, Bessie O. #1 | 9,210 | 00310526 |
| 328988Amendment | Apr 13, 1987 | Apr 13, 1987 | Union Oil Company of California | Andrews | Parker, Bessie O. #1 | 9,210 | 00310526 |
| 328241 | Apr 1, 1987 | Apr 1, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #2538C | 7,200 | 00335776 |
| 328240 | Apr 1, 1987 | Apr 1, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #3237C | 7,200 | 00335777 |
| 328110 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #1059D | 8,150 | 00335767 |
| 328105 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #829D | 8,150 | 00336306 |
| 327988 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Borden | Reinecke Unit #268 | 7,100 | 03331274 |
| 327987 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Borden | Reinecke Unit #204 | 7,100 | 03331278 |
| 327986 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Borden | Reinecke Unit #256 | 7,100 | 03331277 |
| 327985 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Borden | Reinecke Unit #257 | 7,100 | 03331276 |
| 327984 | Mar 25, 1987 | Mar 25, 1987 | Union Oil Company of California | Borden | Reinecke Unit #202 | 7,100 | 03331275 |
| 328108 | Mar 24, 1987 | Mar 24, 1987 | Union Oil Company of California | Andrews | Parker, J. E. "AB" #4 | 9,500 | 00335773 |
| 327927 | Mar 18, 1987 | Mar 18, 1987 | Union Oil Company of California | Andrews | Parker, J. E. "AB" #3 | 9,500 | 00335763 |
| 327926 | Mar 18, 1987 | Mar 18, 1987 | Union Oil Company of California | Borden | Reinecke Unit #267 | 7,100 | 03331273 |
| 327701 | Mar 18, 1987 | Mar 18, 1987 | Union Oil Company of California | Gaines | Norty Riley Unit #266 | 7,500 | 16533602 |
| 327700 | Mar 18, 1987 | Mar 18, 1987 | Union Oil Company of California | Gaines | North Riley Unit #141 | 7,500 | 16533601 |
| 327729 | Mar 17, 1987 | Mar 17, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #1353D | 8,150 | 00335760 |
| 327556 | Mar 12, 1987 | Mar 12, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #4205D | 8,200 | 00335758 |
| 327555 | Mar 12, 1987 | Mar 12, 1987 | Union Oil Company of California | Gaines | North Riley Unit #326 | 7,500 | 16533600 |
| 327460 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #1301D | 8,150 | 00336399 |
| 327459 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #1402D | 8,200 | 00335753 |
| 327458 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #2802D | 8,350 | 00335752 |
| 327457 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #3402D | 7,950 | 00335751 |
| 327456 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #4035D | 8,025 | 00335750 |
| 327455 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #4311D | 8,150 | 00335749 |
| 327454 | Mar 11, 1987 | Mar 11, 1987 | Union Oil Company of California | Andrews | Dollarhide Unit #4608D | 8,385 | 00335755 |
| 327472 | Mar 6, 1987 | Mar 6, 1987 | Union Oil Company of California | Hockley | Smyer, East (Clearfork) Unit #213 | 6,100 | 21935045 |
| 327178 | Mar 6, 1987 | Mar 6, 1987 | Union Oil Company of California | Gaines | North Riley Unit #363 | 7,600 | 16533597 |
| 327177 | Mar 6, 1987 | Mar 6, 1987 | Union Oil Company of California | Gaines | North Riley Unit #353 | 7,600 | 16533596 |
| 327176 | Mar 6, 1987 | Mar 6, 1987 | Union Oil Company of California | Gaines | North Riley Unit #346 | 7,600 | 16533594 |
| 327175 | Mar 6, 1987 | Mar 6, 1987 | Union Oil Company of California | Gaines | North Riley Unit #261 | 7,600 | 16533595 |
| 326777 | Feb 18, 1987 | Feb 18, 1987 | Union Oil Company of California | Ector | Moss Unit #616 | 4,900 | 13535450 |
| 326776 | Feb 18, 1987 | Feb 18, 1987 | Union Oil Company of California | Ector | Moss Unit #617 | 4,900 | 13535449 |
| 326713 | Feb 17, 1987 | Feb 17, 1987 | Union Oil Company of California | Ector | Moss Unit #1615 | 4,900 | 13535435 |
| 326712 | Feb 17, 1987 | Feb 17, 1987 | Union Oil Company of California | Ector | Moss Unit #1015 | 5,000 | 13535436 |
| 326165 | Feb 4, 1987 | Feb 4, 1987 | Union Oil Company of California | Gaines | North Riley Unit #135 | 7,600 | 16533590 |
| 326164 | Feb 4, 1987 | Feb 4, 1987 | Union Oil Company of California | Gaines | North Riley Unit #313 | 7,600 | 16533589 |
| 326163 | Feb 4, 1987 | Feb 4, 1987 | Union Oil Company of California | Gaines | North Riley Unit #336 | 7,600 | 16533588 |
| 325898 | Feb 4, 1987 | Feb 4, 1987 | Union Oil Company of California | Hockley | Smyer East (Clearfork) Unit #115 | 6,100 | 21933059 |
| 325726 | Jan 22, 1987 | Jan 22, 1987 | Union Oil Company of California | Hockley | Smyer, East (Clear Fork) Unit #117 | 6,100 | 21935036 |
| 325725 | Jan 22, 1987 | Jan 22, 1987 | Union Oil Company of California | Hockley | Smyer, East (Clear Fork) Unit #116 | 6,100 | 21935035 |
| 325322 | Jan 13, 1987 | Jan 13, 1987 | Union Oil Company of California | Andrews | Ashton #2 | 9,700 | 00335710 |
| 325321 | Jan 13, 1987 | Jan 13, 1987 | Union Oil Company of California | Andrews | Ashton #3 | 9,700 | 00335711 |
| 321640 | Dec 2, 1986 | Dec 2, 1986 | Union Oil Company of California | Borden | Reinecke Unit #277 | 7,000 | 03331250 |
| 323474 | Nov 26, 1986 | Nov 26, 1986 | Union Oil Company of California | Andrews | Walker #1 | 9,700 | 00335683 |
| 323472 | Nov 26, 1986 | Nov 26, 1986 | Union Oil Company of California | Andrews | Iverson Deep #1 | 9,700 | 00335682 |
| 323530 | Nov 24, 1986 | Nov 24, 1986 | Union Oil Company of California | Howard | Iden #1 | 9,850 | 22734112 |
| 323270 | Nov 18, 1986 | Nov 18, 1986 | Union Oil Company of California | Gaines | North Riley Unit #357 | 7,600 | 16533576 |
| 323269 | Nov 18, 1986 | Nov 18, 1986 | Union Oil Company of California | Gaines | North Riley Unit #322 | 7,600 | 16533575 |
| 323268 | Nov 18, 1986 | Nov 18, 1986 | Union Oil Company of California | Gaines | North Riley Unit #257 | 7,600 | 16533574 |
| 323267 | Nov 18, 1986 | Nov 18, 1986 | Union Oil Company of California | Gaines | North Riley Unit #217 | 7,600 | 16533578 |
| 323266 | Nov 18, 1986 | Nov 18, 1986 | Union Oil Company of California | Gaines | North Riley Unit #343 | 7,600 | 16533577 |
| 323265 | Nov 18, 1986 | Nov 18, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #4714D | 8,100 | 00302660 |
| 322634 | Nov 10, 1986 | Nov 10, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #1593C | 7,450 | 00335670 |
| 322639 | Nov 7, 1986 | Nov 7, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #1472C | 7,450 | 00335672 |
| 322638 | Nov 7, 1986 | Nov 7, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #2888C | 7,450 | 00335671 |
| 322628 | Nov 4, 1986 | Nov 4, 1986 | Union Oil Company of California | Andrews | Parker, J. E. "AB" #2 | 9,500 | 00335665 |
| 322363 | Nov 4, 1986 | Nov 4, 1986 | Union Oil Company of California | Ector | Moss Unit #208 | 4,900 | 13535356 |
| 322355 | Nov 4, 1986 | Nov 4, 1986 | Union Oil Company of California | Ector | Moss Unit #402 | 4,900 | 13535357 |
| 322362 | Oct 28, 1986 | Oct 28, 1986 | Union Oil Company of California | Andrews | Parker, J. E. "AA" #1 | 9,950 | 00335660 |
| 322362Amendment | Oct 28, 1986 | Oct 28, 1986 | Union Oil Company of California | Andrews | Parker, J. E. "AA" #1 | 9,465 | 00335660 |
| 322089 | Oct 20, 1986 | Oct 20, 1986 | Union Oil Company of California | Howard | Evans Trust #1 | 10,500 | 22734073 |
| 321632 | Oct 13, 1986 | Oct 13, 1986 | Union Oil Company of California | Andrews | Parker, J. E. "AB" #1 | 9,500 | 00335648 |
| 321680 | Oct 9, 1986 | Oct 9, 1986 | Union Oil Company of California | Andrews | Ashton #1 | 9,700 | 00335645 |
| 321284 | Sep 29, 1986 | Sep 29, 1986 | Union Oil Company of California | Sterling | Foster, W. L. Jr. "B" #20 | 3,200 | 43131825 |
| 321177 | Sep 26, 1986 | Sep 26, 1986 | Union Oil Company of California | Andrews | Deep Rock State #1 | 9,700 | 00335639 |
| 321177Amendment | Sep 26, 1986 | Sep 26, 1986 | Union Oil Company of California | Andrews | Deep Rock State #1 | 9,700 | 00335639 |
| 320660 | Sep 16, 1986 | Sep 16, 1986 | Union Oil Company of California | Gaines | North Riley Unit #241 | 7,450 | 16533560 |
| 320659 | Sep 16, 1986 | Sep 16, 1986 | Union Oil Company of California | Gaines | North Riley Unit #223 | 7,450 | 16533559 |
| 320658 | Sep 16, 1986 | Sep 16, 1986 | Union Oil Company of California | Gaines | North Riley Unit #352 | 7,450 | 16533558 |
| 320389 | Sep 10, 1986 | Sep 10, 1986 | Union Oil Company of California | Ector | Moss Unit #1810 | 4,900 | 13535341 |
| 320388 | Sep 10, 1986 | Sep 10, 1986 | Union Oil Company of California | Ector | Moss Unit #1721 | 4,900 | 13535339 |
| 320387 | Sep 10, 1986 | Sep 10, 1986 | Union Oil Company of California | Ector | Moss Unit #1720 | 4,900 | 13535340 |
| 320304 | Sep 8, 1986 | Sep 8, 1986 | Union Oil Company of California | Gaines | North Riley Unit #332 | 7,450 | 16533548 |
| 320303 | Sep 8, 1986 | Sep 8, 1986 | Union Oil Company of California | Gaines | North Riley Unit #320 | 7,450 | 16533549 |
| 335144 | Aug 31, 1986 | Aug 31, 1986 | Union Oil Company of California | Andrews | Parker, Bessie O. #3 | 9,800 | 00335914 |
| 305637 | Aug 26, 1986 | Aug 26, 1986 | Union Oil Company of California | Andrews | Grafa Deep #1 | 9,700 | 00335618 |
| 305087 | Aug 8, 1986 | Aug 8, 1986 | Union Oil Company of California | Andrews | Parker, Bessie O. "11" #1 | 9,950 | 00335610 |
| 305087Amendment | Aug 8, 1986 | Aug 8, 1986 | Union Oil Company of California | Andrews | Parker, Bessie O. "11" #1 | 9,760 | 00335610 |
| 304729 | Jul 29, 1986 | Jul 29, 1986 | Union Oil Company of California | Gaines | North Riley Unit #234 | 7,450 | 16533541 |
| 304727 | Jul 29, 1986 | Jul 29, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #2635C | 7,350 | 00335606 |
| 304726 | Jul 29, 1986 | Jul 29, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #2036C | 7,350 | 00335605 |
| 304416 | Jul 22, 1986 | Jul 22, 1986 | Union Oil Company of California | Crane | Cowden, Jerry #8 | 3,340 | 10330793 |
| 304423 | Jul 22, 1986 | Jul 22, 1986 | Union Oil Company of California | Borden | Reinecke Unit #276 | 7,000 | 03331241 |
| 304355 | Jul 18, 1986 | Jul 18, 1986 | Union Oil Company of California | Terry | Noble #1 | 13,500 | 44531439 |
| 304299 | Jul 18, 1986 | Jul 18, 1986 | Union Oil Company of California | Gaines | North Riley Unit #216 | 7,300 | 16533537 |
| 304103 | Jul 14, 1986 | Jul 14, 1986 | Union Oil Company of California | Andrews | Easter Deep #4 | 9,600 | 00335589 |
| 304171 | Jul 11, 1986 | Jul 11, 1986 | Union Oil Company of California | Gaines | North Riley Unit #321 | 7,300 | 16533536 |
| 303693 | Jun 27, 1986 | Jun 27, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #5608D | 8,350 | 00335576 |
| 303498 | Jun 24, 1986 | Jun 24, 1986 | Union Oil Company of California | Andrews | Dollarhide Unit #1258D | 8,250 | 00335574 |
| 302946 | Jun 5, 1986 | Jun 5, 1986 | Union Oil Company of California | Andrews | Parker, J. E. "S" #2 | 9,300 | 00335162 |
| 302946Amendment | Jun 5, 1986 | Jun 5, 1986 | Union Oil Company of California | Andrews | Parker, J. E. "S" #2 | 9,230 | 00335162 |
| 302437 | May 22, 1986 | May 22, 1986 | Union Oil Company of California | Gaines | North Riley Unit #282 | 7,450 | 16533529 |
| 302436 | May 22, 1986 | May 22, 1986 | Union Oil Company of California | Gaines | North Riley Unit #286 | 7,450 | 16533528 |
| 302438 | May 22, 1986 | May 22, 1986 | Union Oil Company of California | Gaines | North Riley Unit #289 | 7,450 | 16533530 |