| 341940 | Apr 12, 1988 | Apr 12, 1988 | Cities Service Oil & Gas Corp. | Gregg | Bolton #10 | 3,700 | 18330723 |
| 344332 | Apr 1, 1988 | Apr 1, 1988 | Cities Service Oil & Gas Corp. | Gregg | P. D. Harrison E Gas Unit #2 | 8,100 | 18330728 |
| 344497 | Mar 29, 1988 | Mar 29, 1988 | Cities Service Oil & Gas Corp. | Ector | Cummins K #7 | 5,759 | 13500120 |
| 344369 | Mar 26, 1988 | Mar 26, 1988 | Cities Service Oil & Gas Corp. | Ector | Cummins K #4 | 6,236 | 13500117 |
| 343620 | Mar 23, 1988 | Mar 23, 1988 | Cities Service Oil & Gas Corp. | Aransas | State Tract 93 #1 | 9,750 | 00700548 |
| 343717 | Mar 11, 1988 | Mar 11, 1988 | Cities Service Oil & Gas Corp. | Schleicher | Robinson E #3 | 5,257 | 41300047 |
| 342767 | Feb 22, 1988 | Feb 22, 1988 | Cities Service Oil & Gas Corp. | Colorado | Columbus Field Unit #1017 | 10,800 | 08931724 |
| 342762 | Feb 22, 1988 | Feb 22, 1988 | Cities Service Oil & Gas Corp. | Colorado | Columbus Field Unit #1018 | 10,800 | 08931723 |
| 342738 | Feb 16, 1988 | Feb 16, 1988 | Cities Service Oil & Gas Corp. | Jackson | Schumaker, I. D. #1 | 10,000 | 23932201 |
| 342427 | Feb 9, 1988 | Feb 9, 1988 | Cities Service Oil & Gas Corp. | Ector | Thomas A #3 | 9,840 | 13506957 |
| 342027 | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #325 | 6,850 | 00336045 |
| 342027Amendment | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #325 | 7,700 | 00336045 |
| 342026 | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #114 | 6,850 | 00336044 |
| 342026Amendment | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #114 | 7,620 | 00336044 |
| 342025Amendment | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #203 | 7,750 | 00336043 |
| 342024 | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #324 | 6,850 | 00336042 |
| 342024Amendment | Jan 29, 1988 | Jan 29, 1988 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #324 | 7,860 | 00336042 |
| 341981 | Jan 28, 1988 | Jan 28, 1988 | Cities Service Oil & Gas Corp. | Colorado | Columbus Field Unit #605L | 9,564 | 08900810 |
| 341902 | Jan 27, 1988 | Jan 27, 1988 | Cities Service Oil & Gas Corp. | Ector | Cummins J #2 | 9,259 | 13500106 |
| 341901 | Jan 27, 1988 | Jan 27, 1988 | Cities Service Oil & Gas Corp. | Ector | Cummins G #2 | 9,800 | 13500209 |
| 341861 | Jan 27, 1988 | Jan 27, 1988 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #3204 | 4,600 | 32931985 |
| 341859 | Jan 26, 1988 | Jan 26, 1988 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #3203 | 4,600 | 32931984 |
| 341725 | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4849 | 5,000 | 11532475 |
| 341722 | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4618 | 5,000 | 11532474 |
| 341721 | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4619 | 5,000 | 11532473 |
| 341720 | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4620 | 5,000 | 11532472 |
| 341719 | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4848 | 5,000 | 11532470 |
| 341706 | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4617 | 5,000 | 11532471 |
| 341706Amendment | Jan 22, 1988 | Jan 22, 1988 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4617 | 5,000 | 11532471 |
| 341209 | Jan 13, 1988 | Jan 13, 1988 | Cities Service Oil & Gas Corp. | Upton | Wilson O #1 | 13,460 | 46132600 |
| 340576 | Dec 28, 1987 | Dec 28, 1987 | Cities Service Oil & Gas Corp. | Ector | Cummins U #4 | 6,078 | 13500145 |
| 340521 | Dec 23, 1987 | Dec 23, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #678 | 4,350 | 13535760 |
| 340519 | Dec 23, 1987 | Dec 23, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #676 | 4,350 | 13535758 |
| 340520 | Dec 22, 1987 | Dec 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #677 | 4,350 | 13535759 |
| 340518 | Dec 22, 1987 | Dec 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #465 | 4,350 | 13535757 |
| 340517 | Dec 22, 1987 | Dec 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #464 | 4,350 | 13535756 |
| 340516 | Dec 22, 1987 | Dec 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #463 | 4,350 | 13535755 |
| 340515 | Dec 22, 1987 | Dec 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #462 | 4,350 | 13535754 |
| 340470 | Dec 22, 1987 | Dec 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #314 | 4,350 | 13535753 |
| 339751 | Dec 11, 1987 | Dec 11, 1987 | Cities Service Oil & Gas Corp. | Ector | Thomas A #4 | 9,840 | 13506958 |
| 339929 | Dec 10, 1987 | Dec 10, 1987 | Cities Service Oil & Gas Corp. | Ector | Pool B #1 | 4,600 | 13535726 |
| 339678 | Dec 7, 1987 | Dec 7, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #2805 | 4,300 | 13535723 |
| 339677 | Dec 7, 1987 | Dec 7, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #3304 | 4,300 | 13535722 |
| 339676 | Dec 7, 1987 | Dec 7, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #2406 | 4,300 | 13535721 |
| 339675 | Dec 7, 1987 | Dec 7, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #2109 | 4,300 | 13535720 |
| 339514 | Dec 3, 1987 | Dec 3, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #1906 | 4,300 | 13535718 |
| 339513 | Dec 3, 1987 | Dec 3, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #1104 | 4,300 | 13535717 |
| 339511 | Dec 3, 1987 | Dec 3, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #2110 | 4,300 | 13535716 |
| 339173 | Nov 25, 1987 | Nov 25, 1987 | Cities Service Oil & Gas Corp. | Colorado | Columbus Field Unit #1007 | 10,252 | 08900303 |
| 338921 | Nov 17, 1987 | Nov 17, 1987 | Cities Service Oil & Gas Corp. | Ector | Cross G #1 | 13,300 | 13535699 |
| 338551 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #6109 | 5,000 | 11532454 |
| 338550 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4847 | 5,000 | 11532459 |
| 338549 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4954 | 5,000 | 11532462 |
| 338548 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4953 | 5,000 | 11532461 |
| 338545 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4846 | 5,000 | 11532458 |
| 338544 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2515 | 5,000 | 11532456 |
| 338543 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2606 | 5,000 | 11532457 |
| 338542 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4512 | 5,000 | 11532455 |
| 338541 | Nov 10, 1987 | Nov 10, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4952 | 5,000 | 11532460 |
| 338451 | Nov 9, 1987 | Nov 9, 1987 | Cities Service Oil & Gas Corp. | Colorado | Columbus Field Unit #504 | 9,727 | 08900060 |
| 338250 | Nov 4, 1987 | Nov 4, 1987 | Cities Service Oil & Gas Corp. | Ector | Blakeney B #5 | 6,000 | 13535685 |
| 338162 | Nov 2, 1987 | Nov 2, 1987 | Cities Service Oil & Gas Corp. | Ector | Cummins P #3 | 6,212 | 13500140 |
| 337567 | Oct 19, 1987 | Oct 19, 1987 | Cities Service Oil & Gas Corp. | Kleberg | May Field Unit #24 | 9,600 | 27332096 |
| 337567Amendment | Oct 19, 1987 | Oct 19, 1987 | Cities Service Oil & Gas Corp. | Kleberg | Mayfield Unit #24 | 9,600 | 27332096 |
| 337210 | Oct 13, 1987 | Oct 13, 1987 | Cities Service Oil & Gas Corp. | Andrews | King B #2 | 12,192 | 00300873 |
| 337162 | Oct 12, 1987 | Oct 12, 1987 | Cities Service Oil & Gas Corp. | Ector | Cummins P #2 | 5,775 | 13500139 |
| 336585 | Sep 30, 1987 | Sep 30, 1987 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #3202 | 4,450 | 32931912 |
| 336463 | Sep 28, 1987 | Sep 28, 1987 | Cities Service Oil & Gas Corp. | Andrews | University 5-3 #1 | 14,000 | 00333217 |
| 335884 | Sep 16, 1987 | Sep 16, 1987 | Cities Service Oil & Gas Corp. | Andrews | University CI #1 | 6,200 | 00335919 |
| 335675 | Sep 10, 1987 | Sep 10, 1987 | Cities Service Oil & Gas Corp. | Wise | West Chico Unit #718 | 5,900 | 49733259 |
| 334998 | Aug 27, 1987 | Aug 27, 1987 | Cities Service Oil & Gas Corp. | Andrews | King B #1 | 12,206 | 00300869 |
| 334805 | Aug 24, 1987 | Aug 24, 1987 | Cities Service Oil & Gas Corp. | Nueces | Mustang Island State Park Tr. 2 #2 | 9,536 | 35532048 |
| 334421 | Aug 12, 1987 | Aug 12, 1987 | Cities Service Oil & Gas Corp. | Liberty | Barngrover Heirs #46 | 5,500 | 29132011 |
| 334126 | Aug 12, 1987 | Aug 12, 1987 | Cities Service Oil & Gas Corp. | Ector | Johnson Grayburg-San Andres Unit #1501 | 4,150 | 13504293 |
| 334355 | Aug 11, 1987 | Aug 11, 1987 | Cities Service Oil & Gas Corp. | Houston | Potter Estate A #1 | 10,750 | 22530737 |
| 329341 | Aug 3, 1987 | Aug 3, 1987 | Cities Service Oil & Gas Corp. | Gregg | Tenery #5 | 3,800 | 18330702 |
| 333710 | Jul 29, 1987 | Jul 29, 1987 | Cities Service Oil & Gas Corp. | Gregg | Killingsworth B #2 | 8,100 | 18330710 |
| 333407 | Jul 24, 1987 | Jul 24, 1987 | Cities Service Oil & Gas Corp. | Ector | Averitt D #1 | 4,950 | 13535599 |
| 333406 | Jul 24, 1987 | Jul 24, 1987 | Cities Service Oil & Gas Corp. | Ector | Averitt E #1 | 4,765 | 13535598 |
| 333406Amendment | Jul 24, 1987 | Jul 24, 1987 | Cities Service Oil & Gas Corp. | Ector | Averitt E #1 | 4,900 | 13535598 |
| 332678 | Jul 9, 1987 | Jul 9, 1987 | Cities Service Oil & Gas Corp. | Jackson | Meek #4 | 9,000 | 23932361 |
| 331786 | Jun 22, 1987 | Jun 22, 1987 | Cities Service Oil & Gas Corp. | Ector | Cummins U #3 | 9,045 | 13500144 |
| 331750 | Jun 18, 1987 | Jun 18, 1987 | Cities Service Oil & Gas Corp. | Terry | Lindsley #2 | 11,470 | 44510010 |
| 331689 | Jun 17, 1987 | Jun 17, 1987 | Cities Service Oil & Gas Corp. | Dawson | Brennand #10 | 8,631 | 11530164 |
| 330889 | Jun 1, 1987 | Jun 1, 1987 | Cities Service Oil & Gas Corp. | Ector | Cummins K #5 | 6,255 | 13500118 |
| 330793 | May 28, 1987 | May 28, 1987 | Cities Service Oil & Gas Corp. | Ector | Thomas A #3 | 9,840 | 13506957 |
| 330775 | May 26, 1987 | May 26, 1987 | Cities Service Oil & Gas Corp. | Colorado | Quin #1 | 10,980 | 08930565 |
| 330318 | May 15, 1987 | May 15, 1987 | Cities Service Oil & Gas Corp. | Smith | Holt P #1 | 8,372 | 42300306 |
| 327097 | Apr 16, 1987 | Apr 16, 1987 | Cities Service Oil & Gas Corp. | Pecos | State of Texas Pecos River Bed #1 | 6,200 | 37135904 |
| 327831 | Mar 18, 1987 | Mar 18, 1987 | Cities Service Oil & Gas Corp. | Kleberg | Childs, E. S. #7 | 9,571 | 27300870 |
| 327831Amendment | Mar 18, 1987 | Mar 18, 1987 | Cities Service Oil & Gas Corp. | Kleberg | Childs Gas Unit (Middle 7) #7 | 9,571 | 27300870 |
| 327356 | Mar 5, 1987 | Mar 5, 1987 | Cities Service Oil & Gas Corp. | Jackson | Meek #3D | 4,300 | 23932338 |
| 327350 | Mar 4, 1987 | Mar 4, 1987 | Cities Service Oil & Gas Corp. | Ward | Blair #1 | 6,872 | 47500639 |
| 326660 | Mar 3, 1987 | Mar 3, 1987 | Cities Service Oil & Gas Corp. | Kleberg | Dietz, J. A. #1 | 10,800 | 27332040 |
| 327007 | Feb 24, 1987 | Feb 24, 1987 | Cities Service Oil & Gas Corp. | Galveston | McLendon et. Al. #1 | 14,700 | 16731128 |
| 326519 | Feb 19, 1987 | Feb 19, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #675 | 4,350 | 13535409 |
| 326518 | Feb 19, 1987 | Feb 19, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #313 | 4,350 | 13535405 |
| 326516 | Feb 19, 1987 | Feb 19, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #460 | 4,350 | 13535403 |
| 326517 | Feb 18, 1987 | Feb 18, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #459 | 4,350 | 13535404 |
| 326515 | Feb 18, 1987 | Feb 18, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #461 | 4,350 | 13535402 |