| 326514 | Feb 18, 1987 | Feb 18, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #672 | 4,350 | 13535408 |
| 326513 | Feb 18, 1987 | Feb 18, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #673 | 4,350 | 13535407 |
| 326512 | Feb 18, 1987 | Feb 18, 1987 | Cities Service Oil & Gas Corp. | Ector | Rhodes Cowden Unit #674 | 4,350 | 13535406 |
| 326043 | Feb 17, 1987 | Feb 17, 1987 | Cities Service Oil & Gas Corp. | Andrews | King C #1 | 12,234 | 00302005 |
| 325626 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4950 | 4,904 | 11532412 |
| 325624 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4947 | 4,950 | 11532408 |
| 325623 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3709 | 4,886 | 11532409 |
| 325621 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3708 | 4,880 | 11532410 |
| 325619 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3607 | 4,872 | 11532411 |
| 325617 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3606 | 4,865 | 11532413 |
| 325615 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2703 | 4,923 | 11532419 |
| 325614 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2514 | 4,955 | 11532418 |
| 325613 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2513 | 4,950 | 11532417 |
| 325612 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #1804 | 4,918 | 11532407 |
| 325611 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2512 | 4,930 | 11532416 |
| 325610 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2510 | 4,930 | 11532415 |
| 325609 | Jan 22, 1987 | Jan 22, 1987 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2511 | 4,935 | 11532414 |
| 323687 | Dec 12, 1986 | Dec 12, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4843 | 4,945 | 11532401 |
| 323686 | Dec 5, 1986 | Dec 5, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4844 | 4,945 | 11532400 |
| 323685 | Dec 5, 1986 | Dec 5, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4845 | 4,945 | 11532399 |
| 323684 | Dec 5, 1986 | Dec 5, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4946 | 4,975 | 11532398 |
| 323403 | Nov 26, 1986 | Nov 26, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4949 | 4,930 | 11532394 |
| 323402 | Nov 26, 1986 | Nov 26, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4948 | 4,970 | 11532395 |
| 323401 | Nov 26, 1986 | Nov 26, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3327 | 4,875 | 11532396 |
| 323400 | Nov 26, 1986 | Nov 26, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3326 | 4,890 | 11532397 |
| 323043 | Nov 19, 1986 | Nov 19, 1986 | Cities Service Oil & Gas Corp. | Harrison | O'Banion A #5 | 6,500 | 20331532 |
| 322301 | Nov 17, 1986 | Nov 17, 1986 | Cities Service Oil & Gas Corp. | Ector | Averitt C #1 | 13,600 | 13535355 |
| 322754 | Nov 5, 1986 | Nov 5, 1986 | Cities Service Oil & Gas Corp. | Chambers | State Tract 18-19D #1 | 12,000 | 07131807 |
| 322754Amendment | Nov 5, 1986 | Nov 5, 1986 | Cities Service Oil & Gas Corp. | Chambers | State Tract 18-19D #1 | 11,525 | 07131807 |
| 322753 | Nov 5, 1986 | Nov 5, 1986 | Cities Service Oil & Gas Corp. | Jackson | Meek #3 | 9,000 | 23932321 |
| 322752 | Nov 5, 1986 | Nov 5, 1986 | Cities Service Oil & Gas Corp. | Jackson | Louis Tittizer Gas Unit No. 1 #3 | 10,700 | 23932320 |
| 320726 | Oct 31, 1986 | Oct 31, 1986 | Cities Service Oil & Gas Corp. | Upshur | Phillips E Gas Unit #2 | 12,000 | 45930648 |
| 322300 | Oct 24, 1986 | Oct 24, 1986 | Cities Service Oil & Gas Corp. | Morris | Nix B #1 | 13,200 | 34330107 |
| 322005 | Oct 23, 1986 | Oct 23, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #2003 | 4,941 | 11501042 |
| 321804 | Oct 16, 1986 | Oct 16, 1986 | Cities Service Oil & Gas Corp. | Hutchinson | Cockrell A #2 | 2,985 | 23301426 |
| 321733 | Oct 13, 1986 | Oct 13, 1986 | Cities Service Oil & Gas Corp. | Upton | Wilson O #1 | 13,350 | 46132600 |
| 321733Amendment | Oct 13, 1986 | Oct 13, 1986 | Cities Service Oil & Gas Corp. | Upton | Wilson O #1 | 13,460 | 46132600 |
| 321733Amendment | Oct 13, 1986 | Oct 13, 1986 | Cities Service Oil & Gas Corp. | Upton | Wilson O #1 | 13,460 | 46132600 |
| 321392 | Oct 3, 1986 | Oct 3, 1986 | Cities Service Oil & Gas Corp. | Andrews | Butler #10 | 13,765 | 00335642 |
| 321122 | Sep 26, 1986 | Sep 26, 1986 | Cities Service Oil & Gas Corp. | Gaines | Butler #3 | 12,575 | 16500614 |
| 320285 | Sep 16, 1986 | Sep 16, 1986 | Cities Service Oil & Gas Corp. | Harrison | O'Banion A #4 | 6,500 | 20331482 |
| 320511 | Sep 15, 1986 | Sep 15, 1986 | Cities Service Oil & Gas Corp. | Liberty | Barngrover Heirs #45 | 6,800 | 29131992 |
| 320508Amendment | Sep 12, 1986 | Sep 12, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4951 | 11,961 | 11532388 |
| 320372 | Sep 11, 1986 | Sep 11, 1986 | Cities Service Oil & Gas Corp. | Andrews | King B #4 | 12,280 | 00300870 |
| 320693 | Aug 26, 1986 | Aug 26, 1986 | Cities Service Oil & Gas Corp. | San Patricio | Smith "L" #1 | 14,000 | 40930673 |
| 305581 | Aug 19, 1986 | Aug 19, 1986 | Cities Service Oil & Gas Corp. | Sherman | Ebel A #1 | 2,000 | 42130353 |
| 305090 | Aug 7, 1986 | Aug 7, 1986 | Cities Service Oil & Gas Corp. | Carson | Burnett "H" #1 | 3,044 | 06500708 |
| 342025 | Jul 29, 1986 | Jul 29, 1986 | Cities Service Oil & Gas Corp. | Andrews | North Dollarhide Unit #203 | 6,850 | 00336043 |
| 304220 | Jul 16, 1986 | Jul 16, 1986 | Cities Service Oil & Gas Corp. | Hemphill | Wiggins A #1 | 11,871 | 21130522 |
| 304095 | Jul 14, 1986 | Jul 14, 1986 | Cities Service Oil & Gas Corp. | Starr | Martinez C #4 | 8,524 | 42701240 |
| 303697 | Jun 30, 1986 | Jun 30, 1986 | Cities Service Oil & Gas Corp. | Nueces | State Tract #49 #4 | 11,611 | 35506510 |
| 303271 | Jun 9, 1986 | Jun 9, 1986 | Cities Service Oil & Gas Corp. | Hutchinson | Southland B #6 | 3,142 | 23300562 |
| 300754 | Apr 8, 1986 | Apr 8, 1986 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #4105 | 13,079 | 32900418 |
| 300563 | Apr 2, 1986 | Apr 2, 1986 | Cities Service Oil & Gas Corp. | Upton | Taylor H #1 | 10,500 | 46132574 |
| 300579 | Apr 2, 1986 | Apr 2, 1986 | Cities Service Oil & Gas Corp. | Upton | Taylor H #2 | 10,500 | 46132575 |
| 300111 | Mar 24, 1986 | Mar 24, 1986 | Cities Service Oil & Gas Corp. | Wise | Ashe Bcde #E04 | 7,500 | 49701362 |
| 299295 | Mar 4, 1986 | Mar 4, 1986 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #410 | 13,170 | 32900437 |
| 298917 | Mar 3, 1986 | Mar 3, 1986 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #4503 | 13,220 | 32900390 |
| 298926 | Mar 3, 1986 | Mar 3, 1986 | Cities Service Oil & Gas Corp. | Ector | Cowden R #18 | 9,230 | 13530765 |
| 298379 | Feb 24, 1986 | Feb 24, 1986 | Cities Service Oil & Gas Corp. | Wise | Tarrant E #1 | 6,025 | 49701383 |
| 297748 | Feb 14, 1986 | Feb 14, 1986 | Cities Service Oil & Gas Corp. | De Witt | Gohmert "A" #1 | 7,661 | 12300633 |
| 297537 | Feb 11, 1986 | Feb 11, 1986 | Cities Service Oil & Gas Corp. | Andrews | Butler #9 | 13,770 | 00335468 |
| 297232 | Feb 7, 1986 | Feb 7, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4945W | 4,890 | 11532367 |
| 297232Amendment | Feb 7, 1986 | Feb 7, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4945 | 4,900 | 11532367 |
| 297231 | Feb 7, 1986 | Feb 7, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3811W | 4,890 | 11532366 |
| 297231Amendment | Feb 7, 1986 | Feb 7, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3811 | 4,896 | 11532366 |
| 296421 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Smith | Gee A #1 | 8,800 | 42331062 |
| 296577 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3412 | 4,890 | 11532358 |
| 296590 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3325 | 4,895 | 11532359 |
| 296608 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3324 | 4,895 | 11532362 |
| 296575 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3323 | 4,885 | 11532356 |
| 296576 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3322 | 4,885 | 11532357 |
| 296574 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3321 | 4,890 | 11532355 |
| 296609 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4842 | 4,930 | 11532363 |
| 296593 | Jan 29, 1986 | Jan 29, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3810 | 4,880 | 11532360 |
| 296467 | Jan 28, 1986 | Jan 28, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3329W | 4,900 | 11532354 |
| 296746 | Jan 27, 1986 | Jan 27, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4841 | 4,920 | 11532364 |
| 296281 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3414W | 4,920 | 11532346 |
| 296280 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3413W | 4,880 | 11532345 |
| 296280Amendment | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3413 | 4,870 | 11532345 |
| 296285 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3331W | 4,905 | 11532349 |
| 296462 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3330W | 4,915 | 11532350 |
| 296464 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #7916W | 4,935 | 11532351 |
| 296466 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #7702W | 4,940 | 11532353 |
| 296283 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4944W | 4,880 | 11532348 |
| 296283Amendment | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4944 | 4,935 | 11532348 |
| 296282 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4943W | 4,905 | 11532347 |
| 296465 | Jan 24, 1986 | Jan 24, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #4840W | 4,950 | 11532352 |
| 296594 | Jan 21, 1986 | Jan 21, 1986 | Cities Service Oil & Gas Corp. | Dawson | West Welch Unit #3809 | 4,880 | 11532361 |
| 295230 | Jan 6, 1986 | Jan 6, 1986 | Cities Service Oil & Gas Corp. | Dawson | South Welch Unit #105 | 5,044 | 11532262 |
| 292208 | Dec 9, 1985 | Dec 9, 1985 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #1605 | 13,230 | 32902043 |
| 291060 | Nov 25, 1985 | Nov 25, 1985 | Cities Service Oil & Gas Corp. | Ector | Bagley A #22 | 9,300 | 13535182 |
| 290753 | Nov 22, 1985 | Nov 22, 1985 | Cities Service Oil & Gas Corp. | Harrison | O'Banion A #3 | 6,800 | 20331341 |
| 290659 | Nov 21, 1985 | Nov 21, 1985 | Cities Service Oil & Gas Corp. | Loving | Texaco "35" #2 | 21,700 | 30130682 |
| 290522 | Nov 20, 1985 | Nov 20, 1985 | Cities Service Oil & Gas Corp. | Matagorda | Miller, Louise Holman et al "A" #1 | 12,500 | 32131316 |
| 290054 | Nov 14, 1985 | Nov 14, 1985 | Cities Service Oil & Gas Corp. | Victoria | Kolle, Nedith #1 | 10,700 | 46932444 |
| 290507 | Nov 14, 1985 | Nov 14, 1985 | Cities Service Oil & Gas Corp. | Ector | Averitt B #1 | 13,755 | 13535170 |
| 290443 | Nov 14, 1985 | Nov 14, 1985 | Cities Service Oil & Gas Corp. | Cherokee | Woodard B #1 | 11,400 | 07330683 |
| 290192 | Nov 12, 1985 | Nov 12, 1985 | Cities Service Oil & Gas Corp. | Starr | Martinez C #2 | 8,260 | 42701238 |
| 287645 | Oct 17, 1985 | Oct 17, 1985 | Cities Service Oil & Gas Corp. | Midland | Dora Roberts Ranch Unit #4605 | 12,485 | 32900407 |