| 351760 | Oct 3, 1988 | Oct 3, 1988 | Estoril Producing Corporation | Crane | Jordan/Pennsylvanian/Unit #133 | 8,100 | 10304981 |
| 340656 | Dec 30, 1987 | Dec 30, 1987 | Estoril Producing Corporation | Crane | Jordan (Pennsylvania) Unit #135 | 8,200 | 10333830 |
| 340656Amendment | Dec 30, 1987 | Dec 30, 1987 | Estoril Producing Corporation | Crane | Jordan (Pennsylvania) Unit #135 | 8,150 | 10333830 |
| 302719 | May 29, 1986 | May 29, 1986 | Estoril Producing Corporation | Yoakum | Nielsen #2 | 13,200 | 50133072 |
| 300858 | Apr 8, 1986 | Apr 8, 1986 | Estoril Producing Corporation | Callahan | Snyder Trust "A" #1 | 1,250 | 05935575 |
| 299463 | Mar 12, 1986 | Mar 12, 1986 | Estoril Producing Corporation | Andrews | Bedford #1 | 11,500 | 00335514 |
| 297491 | Feb 7, 1986 | Feb 7, 1986 | Estoril Producing Corporation | Reeves | Arco Armstrong #1 | 3,700 | 38931712 |
| 295257 | Jan 14, 1986 | Jan 14, 1986 | Estoril Producing Corporation | Upton | Barnet, Rosa #1020 | 9,400 | 46110107 |
| 294507 | Jan 6, 1986 | Jan 6, 1986 | Estoril Producing Corporation | Yoakum | Bearden #1 | 6,800 | 50133013 |
| 294045 | Dec 27, 1985 | Dec 27, 1985 | Estoril Producing Corporation | Crockett | University Buckhorn #1 | 8,500 | 10535212 |
| 291748 | Dec 4, 1985 | Dec 4, 1985 | Estoril Producing Corporation | Yoakum | Wasson Deep #1 | 10,500 | 50132987 |
| 288774 | Oct 31, 1985 | Oct 31, 1985 | Estoril Producing Corporation | Callahan | Snyder Trust #1 | 2,600 | 05935469 |
| 288728 | Oct 30, 1985 | Oct 30, 1985 | Estoril Producing Corporation | Yoakum | Scottish Rite #1 | 13,500 | 50132967 |
| 288730 | Oct 30, 1985 | Oct 30, 1985 | Estoril Producing Corporation | Yoakum | Smart #1 | 13,000 | 50132968 |
| 287493 | Oct 16, 1985 | Oct 16, 1985 | Estoril Producing Corporation | Yoakum | Stone #1 | 13,355 | 50132908 |
| 284431 | Sep 10, 1985 | Sep 10, 1985 | Estoril Producing Corporation | Upton | Barnet, Rosa #1020 | 9,007 | 46110107 |
| 284119 | Sep 5, 1985 | Sep 5, 1985 | Estoril Producing Corporation | Garza | Macy-Lott #2 | 8,500 | 16932633 |
| 280520 | Jul 19, 1985 | Jul 19, 1985 | Estoril Producing Corporation | Yoakum | Hawn #2 | 13,500 | 50132909 |
| 280276 | Jul 16, 1985 | Jul 16, 1985 | Estoril Producing Corporation | Yoakum | Stone #1 | 13,500 | 50132908 |
| 277366 | Jun 11, 1985 | Jun 11, 1985 | Estoril Producing Corporation | Yoakum | Littlefield #1 | 13,500 | 50132881 |
| 276852 | Jun 4, 1985 | Jun 4, 1985 | Estoril Producing Corporation | Eastland | Hammit, Fred #1 | 1,400 | 13336514 |
| 276023 | May 28, 1985 | May 28, 1985 | Estoril Producing Corporation | Yoakum | Neilson #1 | 13,500 | 50132876 |
| 272583 | Apr 17, 1985 | Apr 17, 1985 | Estoril Producing Corporation | Garza | Macy-Lott #1 | 8,500 | 16932574 |
| 271354 | Apr 3, 1985 | Apr 3, 1985 | Estoril Producing Corporation | Yoakum | Hawn #1 | 13,500 | 50132821 |
| 269659 | Mar 19, 1985 | Mar 19, 1985 | Estoril Producing Corporation | Yoakum | Bohls #1 | 13,500 | 50132811 |
| 265554 | Jan 28, 1985 | Jan 28, 1985 | Estoril Producing Corporation | Garza | Lott #1 | 8,600 | 16932511 |
| 264883 | Jan 22, 1985 | Jan 22, 1985 | Estoril Producing Corporation | Yoakum | Kendrick #1 | 13,500 | 50132777 |
| 259104 | Nov 27, 1984 | Nov 27, 1984 | Estoril Producing Corporation | Schleicher | Meador "66" #1 | 7,250 | 41331483 |
| 258430 | Nov 21, 1984 | Nov 21, 1984 | Estoril Producing Corporation | Yoakum | Boswell #2 | 13,500 | 50132747 |
| 251778 | Sep 17, 1984 | Sep 17, 1984 | Estoril Producing Corporation | Crockett | Owens #1 | 7,000 | 10534895 |
| 251237 | Sep 11, 1984 | Sep 11, 1984 | Estoril Producing Corporation | Terry | Brownfield "B" #2 | 6,800 | 44531243 |
| 250573 | Sep 6, 1984 | Sep 6, 1984 | Estoril Producing Corporation | Schleicher | Meador #502 | 7,316 | 41330331 |
| 248891 | Aug 21, 1984 | Aug 21, 1984 | Estoril Producing Corporation | Yoakum | Boswell #1 | 13,136 | 50132673 |
| 245009 | Jul 16, 1984 | Jul 16, 1984 | Estoril Producing Corporation | Schleicher | Meador "57" #1 | 7,250 | 41331432 |
| 234997 | Apr 10, 1984 | Apr 10, 1984 | Estoril Producing Corporation | Terry | Brownfield "A" #1 | 6,800 | 44531207 |
| 234998 | Apr 10, 1984 | Apr 10, 1984 | Estoril Producing Corporation | Terry | Brownfield "B" #1 | 6,800 | 44531208 |
| 222589 | Dec 6, 1983 | Dec 6, 1983 | Estoril Producing Corporation | Crockett | Elliott, M. "B" #1 | 8,200 | 10534689 |
| 222555 | Dec 5, 1983 | Dec 5, 1983 | Estoril Producing Corporation | Terry | Brownfield #1 | 6,800 | 44531170 |
| 219216 | Oct 31, 1983 | Oct 31, 1983 | Estoril Producing Corporation | Glasscock | Clark 17 #1 | 2,500 | 17331498 |
| 206773 | Aug 22, 1983 | Aug 22, 1983 | Estoril Producing Corporation | Howard | Northcutt #1 | 8,700 | 22733131 |
| 204113 | Aug 3, 1983 | Aug 3, 1983 | Estoril Producing Corporation | Loving | Madera, M. #2 | 5,150 | 30130454 |
| 198661 | Jun 15, 1983 | Jun 15, 1983 | Estoril Producing Corporation | Crockett | University-Elger #501 | 1,850 | 10534506 |
| 153854 | Feb 19, 1982 | Feb 19, 1982 | Estoril Producing Corporation | Taylor | Henson #1A | 3,200 | 44132119 |
| 151158 | Feb 19, 1982 | Feb 19, 1982 | Estoril Producing Corporation | Crockett | Shannon Estate "59" #2 | 8,760 | 10533916 |
| 150623 | Feb 12, 1982 | Feb 12, 1982 | Estoril Producing Corporation | Taylor | Henson #1 | 3,200 | 44100121 |
| 146346 | Dec 31, 1981 | Dec 31, 1981 | Estoril Producing Corporation | Borden | Sterling Williams #2 | 8,400 | 03330764 |
| 146345 | Dec 31, 1981 | Dec 31, 1981 | Estoril Producing Corporation | Schleicher | Blaylock #1 | 9,468 | 41331182 |
| 143108 | Dec 8, 1981 | Dec 8, 1981 | Estoril Producing Corporation | Crockett | Mitcham #1A | 8,072 | 10533752 |
| 148001 | Dec 2, 1981 | Dec 2, 1981 | Estoril Producing Corporation | Borden | Lemley, Joe R. #1A | 8,400 | 03330771 |
| 139646 | Nov 5, 1981 | Nov 5, 1981 | Estoril Producing Corporation | Glasscock | Yeager #1 | 10,630 | 17331233 |
| 137845 | Oct 23, 1981 | Oct 23, 1981 | Estoril Producing Corporation | Terry | Rushing #1A | 12,960 | 44531003 |
| 136240 | Oct 13, 1981 | Oct 13, 1981 | Estoril Producing Corporation | Crockett | University "23" #1 | 8,213 | 10531768 |
| 134270 | Sep 24, 1981 | Sep 24, 1981 | Estoril Producing Corporation | Crockett | Shannon Estate "59" #1 | 9,000 | 10533643 |
| 132697 | Sep 8, 1981 | Sep 8, 1981 | Estoril Producing Corporation | Pecos | Elsinore Cattle Company #14-1 | 14,850 | 37133554 |
| 131600 | Aug 28, 1981 | Aug 28, 1981 | Estoril Producing Corporation | Borden | Lemley, Joe R. #1 | 3,757 | 03330715 |
| 131599 | Aug 28, 1981 | Aug 28, 1981 | Estoril Producing Corporation | Borden | Williams, Sterling #1 | 9,000 | 03330714 |
| 130269 | Aug 14, 1981 | Aug 14, 1981 | Estoril Producing Corporation | Terry | Rushing #1 | 5,000 | 44530980 |
| 126307 | Jul 23, 1981 | Jul 23, 1981 | Estoril Producing Corporation | Terry | Davis, Paul #1 | 11,700 | 44530971 |
| 122597 | Jun 25, 1981 | Jun 25, 1981 | Estoril Producing Corporation | Howard | Wright Ranch #1 | 10,703 | 22732474 |
| 122550 | Jun 25, 1981 | Jun 25, 1981 | Estoril Producing Corporation | Crockett | Elliott, M. "A" #2 | 8,500 | 10533477 |
| 121706 | Jun 18, 1981 | Jun 18, 1981 | Estoril Producing Corporation | Yoakum | Latham #1 | 13,320 | 50132117 |
| 120720 | Jun 12, 1981 | Jun 12, 1981 | Estoril Producing Corporation | Crockett | Mitcham #1 | 8,040 | 10533452 |
| 124944 | Jun 4, 1981 | Jun 4, 1981 | Estoril Producing Corporation | Crockett | Mitchell #1 | 15,000 | 10533446 |
| 115567 | Apr 10, 1981 | Apr 10, 1981 | Estoril Producing Corporation | Kent | Wallace 34 #1 | 6,700 | 26330774 |
| 105552 | Jan 20, 1981 | Jan 20, 1981 | Estoril Producing Corporation | Howard | Armstrong #1 | 10,496 | 22732338 |
| 101713 | Dec 10, 1980 | Dec 10, 1980 | Estoril Producing Corporation | Howard | Robb "25" #1 | 10,805 | 22732321 |
| 100614 | Dec 2, 1980 | Dec 2, 1980 | Estoril Producing Corporation | Upton | University - Hood "7" #1 | 12,443 | 46131683 |
| 100574 | Dec 1, 1980 | Dec 1, 1980 | Estoril Producing Corporation | Yoakum | Moore #1 | 13,125 | 50131954 |
| 98699 | Nov 12, 1980 | Nov 12, 1980 | Estoril Producing Corporation | Yoakum | Bedford #1 | 12,400 | 50131942 |
| 99294 | Nov 5, 1980 | Nov 5, 1980 | Estoril Producing Corporation | Howard | Ray #1 | 10,500 | 22732288 |
| 97107 | Oct 27, 1980 | Oct 27, 1980 | Estoril Producing Corporation | Crockett | Hagelstein #1 | 8,771 | 10533112 |
| 96367 | Oct 22, 1980 | Oct 22, 1980 | Estoril Producing Corporation | Terry | Wheatley #1 | 12,980 | 44530880 |
| 95125 | Oct 9, 1980 | Oct 9, 1980 | Estoril Producing Corporation | Sutton | Bloodworth "134" #1 | 7,545 | 43532414 |
| 94604 | Oct 3, 1980 | Oct 3, 1980 | Estoril Producing Corporation | Callahan | Dyer #2-57 | 3,250 | 05982329 |
| 87629 | Jul 24, 1980 | Jul 24, 1980 | Estoril Producing Corporation | Lynn | Earles Estate #1 | 11,200 | 30530228 |
| 86867 | Jul 17, 1980 | Jul 17, 1980 | Estoril Producing Corporation | Fisher | Stribling #1 | 3,800 | 15131135 |
| 86762 | Jul 15, 1980 | Jul 15, 1980 | Estoril Producing Corporation | Fisher | Fowler #1 | 3,650 | 15131134 |
| 85161 | Jun 26, 1980 | Jun 26, 1980 | Estoril Producing Corporation | Terry | Golden #1 | 10,350 | 44530851 |
| 84482 | Jun 20, 1980 | Jun 20, 1980 | Estoril Producing Corporation | Winkler | Yeates, Bob University "45" #1 | 7,000 | 49531219 |
| 84481 | Jun 20, 1980 | Jun 20, 1980 | Estoril Producing Corporation | Winkler | Yeates, Bob University "39-A" #1 | 7,000 | 49531218 |
| 84480 | Jun 20, 1980 | Jun 20, 1980 | Estoril Producing Corporation | Winkler | Yeates, Bob University "39" #1 | 6,400 | 49531217 |
| 81349 | May 16, 1980 | May 16, 1980 | Estoril Producing Corporation | Terry | Newsom #1 | 11,000 | 44530834 |
| 76944 | Apr 2, 1980 | Apr 2, 1980 | Estoril Producing Corporation | Crockett | Elliott, M. "A" #1 | 8,200 | 10532759 |
| 71483 | Feb 1, 1980 | Feb 1, 1980 | Estoril Producing Corporation | Howard | Schweitzer #1 | 9,738 | 22732098 |
| 71482 | Feb 1, 1980 | Feb 1, 1980 | Estoril Producing Corporation | Glasscock | Edwards "47" #1 | 3,200 | 17331042 |
| 70023 | Jan 17, 1980 | Jan 17, 1980 | Estoril Producing Corporation | Crockett | Elliott, M. #1 | 8,200 | 10532646 |
| 68680 | Jan 4, 1980 | Jan 4, 1980 | Estoril Producing Corporation | Andrews | University "5" #2 | 9,500 | 00332180 |
| 68678 | Jan 4, 1980 | Jan 4, 1980 | Estoril Producing Corporation | Andrews | University "5" #3 | 9,500 | 00332179 |
| 68675 | Jan 4, 1980 | Jan 4, 1980 | Estoril Producing Corporation | Andrews | University "5" #4 | 9,500 | 00332178 |
| 62666 | Nov 1, 1979 | Nov 1, 1979 | Estoril Producing Corporation | Terry | Sleeper #1 | 11,902 | 44530798 |
| 59345 | Oct 1, 1979 | Oct 1, 1979 | Estoril Producing Corporation | Callahan | Dyer #2-57WS | 3,250 | 05982329 |
| 58919 | Sep 17, 1979 | Sep 17, 1979 | Estoril Producing Corporation | Gaines | Collett "18" #1 | 10,330 | 16531651 |
| 57177 | Sep 5, 1979 | Sep 5, 1979 | Estoril Producing Corporation | Crockett | Pan AM University "28" #1 | 3,826 | 10502108 |
| 56727 | Aug 29, 1979 | Aug 29, 1979 | Estoril Producing Corporation | Andrews | University "5" #1 | 9,500 | 00332020 |
| 56666 | Aug 29, 1979 | Aug 29, 1979 | Estoril Producing Corporation | Howard | Cree, Mildred #1 | 10,211 | 22731953 |
| 47807 | May 4, 1979 | May 4, 1979 | Estoril Producing Corporation | Glasscock | Clark #9D | 6,000 | 17330419 |
| 43323 | Feb 27, 1979 | Feb 27, 1979 | Estoril Producing Corporation | Glasscock | Currie, G. W. #3 | 9,800 | 17330967 |
| 41581 | Jan 29, 1979 | Jan 29, 1979 | Estoril Producing Corporation | Runnels | Airport #1 | 4,000 | 39931320 |
| 36858 | Nov 14, 1978 | Nov 14, 1978 | Estoril Producing Corporation | Gaines | Smith, J. L. #1 | 5,200 | 16531494 |
| 32760 | Sep 15, 1978 | Sep 15, 1978 | Estoril Producing Corporation | Howard | Underwood, J. E. #1 | 9,087 | 22731666 |