| 476742 | May 29, 1998 | May 29, 1998 | Umc Petroleum Corporation | Hutchinson | Womble #407 | 3,600 | 23332831 |
| 476741 | May 29, 1998 | May 29, 1998 | Umc Petroleum Corporation | Hutchinson | Womble #507 | 3,600 | 23332830 |
| 476697 | May 28, 1998 | May 28, 1998 | Umc Petroleum Corporation | Upton | Amacker 80 #8 | 9,500 | 46133935 |
| 476696 | May 28, 1998 | May 28, 1998 | Umc Petroleum Corporation | Hutchinson | McNutt #4066 | 3,600 | 23332829 |
| 476695 | May 28, 1998 | May 28, 1998 | Umc Petroleum Corporation | Hutchinson | McCloy #4067 | 3,600 | 23332828 |
| 476694 | May 28, 1998 | May 28, 1998 | Umc Petroleum Corporation | Hutchinson | Pritchard #706 | 3,600 | 23332827 |
| 476397 | May 18, 1998 | May 18, 1998 | Umc Petroleum Corporation | Hutchinson | Cunningham #208 | 5,600 | 23332818 |
| 476396 | May 18, 1998 | May 18, 1998 | Umc Petroleum Corporation | Hutchinson | Cunningham #408 | 3,600 | 23332817 |
| 476395 | May 18, 1998 | May 18, 1998 | Umc Petroleum Corporation | Hutchinson | Cunningham #308 | 3,600 | 23332816 |
| 476394 | May 18, 1998 | May 18, 1998 | Umc Petroleum Corporation | Hutchinson | Hadley #803 | 3,600 | 23332819 |
| 476228 | May 13, 1998 | May 13, 1998 | Umc Petroleum Corporation | Upton | McElroy Ranch Co. "F" #27 | 10,000 | 46133933 |
| 475862 | Apr 30, 1998 | Apr 30, 1998 | Umc Petroleum Corporation | Upton | McElroy Ranch Co. "G" #23 | 9,800 | 46133931 |
| 474779 | Mar 26, 1998 | Mar 26, 1998 | Umc Petroleum Corporation | Upton | McElroy Ranch Co "F" #26 | 10,000 | 46133929 |
| 469086 | Nov 3, 1997 | Nov 3, 1997 | Umc Petroleum Corporation | Upton | McElroy Ranch Co "F" #10 | 9,300 | 46110055 |
| 469135 | Oct 22, 1997 | Oct 22, 1997 | Umc Petroleum Corporation | Upton | McElroy Ranch Co. "F" #25 | 9,700 | 46133871 |
| 468331 | Oct 2, 1997 | Oct 2, 1997 | Umc Petroleum Corporation | Hutchinson | McNutt #1 | 3,299 | 23330116 |
| 468888 | Sep 24, 1997 | Sep 24, 1997 | Umc Petroleum Corporation | Upton | Amacker 80 #6 | 9,150 | 46132324 |
| 467210 | Sep 12, 1997 | Sep 12, 1997 | Umc Petroleum Corporation | Hutchinson | Pritchard #606H | 3,300 | 23332761 |
| 466153 | Aug 12, 1997 | Aug 12, 1997 | Umc Petroleum Corporation | Upton | McElroy 42-28 #1 | 12,100 | 46133832 |
| 465628 | Jul 29, 1997 | Jul 29, 1997 | Umc Petroleum Corporation | Upton | Amacker 80 #7 | 9,500 | 46133513 |
| 463656 | Jun 12, 1997 | Jun 12, 1997 | Umc Petroleum Corporation | Upton | Amacker 80 #6 | 9,500 | 46132324 |
| 463498 | Jun 9, 1997 | Jun 9, 1997 | Umc Petroleum Corporation | Terry | NE Welch Unit #911 | 5,050 | 44531826 |
| 462825 | May 23, 1997 | May 23, 1997 | Umc Petroleum Corporation | Gaines | Flanagan #9 | 6,200 | 16535183 |
| 462147 | May 8, 1997 | May 8, 1997 | Umc Petroleum Corporation | Winkler | University 21-9 #1 | 21,200 | 49532686 |
| 461568 | Apr 24, 1997 | Apr 24, 1997 | Umc Petroleum Corporation | Gaines | Flanagan #8 | 6,200 | 16535167 |
| 461294 | Apr 17, 1997 | Apr 17, 1997 | Umc Petroleum Corporation | Upton | Amacker 80 #5 | 9,150 | 46133779 |
| 461003 | Apr 11, 1997 | Apr 11, 1997 | Umc Petroleum Corporation | Winkler | University 21-21 #1 | 7,300 | 49532666 |
| 460215 | Mar 25, 1997 | Mar 25, 1997 | Umc Petroleum Corporation | Matagorda | Spencer, Angeline #1 | 2,100 | 32181685 |
| 460128 | Mar 25, 1997 | Mar 25, 1997 | Umc Petroleum Corporation | Dawson | Christine (Spraberry) Unit #303 | 7,300 | 11532959 |
| 457400 | Jan 22, 1997 | Jan 22, 1997 | Umc Petroleum Corporation | High IS-LB | State Tract 98-L #2 | 9,500 | 70830355 |
| 457438 | Jan 17, 1997 | Jan 17, 1997 | Umc Petroleum Corporation | Hutchinson | Womble, R #3040 | 3,400 | 23332712 |
| 457437 | Jan 17, 1997 | Jan 17, 1997 | Umc Petroleum Corporation | Hutchinson | Womble, R #4040 | 3,400 | 23332711 |
| 456375 | Dec 16, 1996 | Dec 16, 1996 | Umc Petroleum Corporation | Midland | Sanders, June T #5 | 10,800 | 32933629 |
| 456374 | Dec 16, 1996 | Dec 16, 1996 | Umc Petroleum Corporation | Upton | McElroy Ranch Co. "F" #24 | 9,700 | 46133692 |
| 456170 | Dec 12, 1996 | Dec 12, 1996 | Umc Petroleum Corporation | Hutchinson | McNutt #3066 | 3,300 | 23332704 |
| 453913 | Oct 18, 1996 | Oct 18, 1996 | Umc Petroleum Corporation | Leon | Helmcamp #1 | 16,000 | 28931248 |
| 453913Amendment | Oct 18, 1996 | Oct 18, 1996 | Umc Petroleum Corporation | Leon | Helmcamp #1 | 17,000 | 28931248 |
| 453913Amendment | Oct 18, 1996 | Oct 18, 1996 | Umc Petroleum Corporation | Leon | Helmcamp #1 | 17,000 | 28931248 |
| 450418 | Aug 15, 1996 | Aug 15, 1996 | Umc Petroleum Corporation | Hutchinson | Womble #204 | 3,255 | 23320056 |
| 450417 | Aug 15, 1996 | Aug 15, 1996 | Umc Petroleum Corporation | Hutchinson | Womble #504 | 3,204 | 23330179 |
| 450416 | Aug 15, 1996 | Aug 15, 1996 | Umc Petroleum Corporation | Hutchinson | Womble #604 | 3,250 | 23330183 |
| 450415 | Aug 15, 1996 | Aug 15, 1996 | Umc Petroleum Corporation | Hutchinson | Womble #704 | 3,250 | 23330184 |
| 450414 | Aug 15, 1996 | Aug 15, 1996 | Umc Petroleum Corporation | Hutchinson | Womble #10 4 | 3,250 | 23330191 |
| 450986 | Aug 1, 1996 | Aug 1, 1996 | Umc Petroleum Corporation | Hemphill | Little #1030 | 8,325 | 21130138 |
| 450698 | Jul 24, 1996 | Jul 24, 1996 | Umc Petroleum Corporation | Gaines | Flanagan #7 | 6,200 | 16535039 |
| 449719 | Jul 23, 1996 | Jul 23, 1996 | Umc Petroleum Corporation | Gaines | Flanagan #6 | 6,200 | 16535032 |
| 448798 | Jun 7, 1996 | Jun 7, 1996 | Umc Petroleum Corporation | Ward | University 17-6 #1 | 11,428 | 47531668 |
| 447857 | May 13, 1996 | May 13, 1996 | Umc Petroleum Corporation | Midland | Sanders, June T. #4 | 13,400 | 32910384 |
| 446014 | Mar 19, 1996 | Mar 19, 1996 | Umc Petroleum Corporation | Midland | Sanders, June T. #3 | 13,391 | 32902024 |
| 445402 | Mar 4, 1996 | Mar 4, 1996 | Umc Petroleum Corporation | Midland | TXL "G" #3 | 13,495 | 32902027 |
| 444598 | Feb 9, 1996 | Feb 9, 1996 | Umc Petroleum Corporation | Midland | Gray, Emma D. #2 | 13,311 | 32902032 |
| 444393 | Feb 5, 1996 | Feb 5, 1996 | Umc Petroleum Corporation | High IS-LB | State Tract 98-L #1 | 10,800 | 70830341 |
| 444393Amendment | Feb 5, 1996 | Feb 5, 1996 | Umc Petroleum Corporation | High IS-LB | State Tract 98-L #1 | 10,800 | 70830341 |
| 443789 | Jan 18, 1996 | Jan 18, 1996 | Umc Petroleum Corporation | Midland | Wallin, H. C. #1 | 13,424 | 32902028 |
| 442211 | Nov 29, 1995 | Nov 29, 1995 | Umc Petroleum Corporation | Winkler | Carameros Etal #1 | 8,500 | 49532509 |
| 442211Amendment | Nov 29, 1995 | Nov 29, 1995 | Umc Petroleum Corporation | Winkler | Carameros Etal #1 | 8,500 | 49532509 |
| 441907 | Nov 20, 1995 | Nov 20, 1995 | Umc Petroleum Corporation | Dawson | Christine (Spraberry) Unit #302 | 7,200 | 11532879 |
| 441924 | Nov 14, 1995 | Nov 14, 1995 | Umc Petroleum Corporation | Gaines | Flanagan #5 | 6,200 | 16534926 |
| 439383 | Aug 31, 1995 | Aug 31, 1995 | Umc Petroleum Corporation | Victoria | Gonzales, Mauro Estate #4 | 8,781 | 46900076 |
| 435503 | May 5, 1995 | May 5, 1995 | Umc Petroleum Corporation | Hemphill | Wright #1151 | 10,100 | 21130239 |
| 434969 | Apr 19, 1995 | Apr 19, 1995 | Umc Petroleum Corporation | Ward | Rodgers #1 | 19,190 | 47530993 |
| 434686 | Apr 11, 1995 | Apr 11, 1995 | Umc Petroleum Corporation | Leon | Watson, Elmore Estate #1 | 10,570 | 28931158 |
| 433718 | Mar 23, 1995 | Mar 23, 1995 | Umc Petroleum Corporation | Dawson | Bartlett, V.S. #2 | 8,826 | 11530279 |
| 427370 | Aug 29, 1994 | Aug 29, 1994 | Umc Petroleum Corporation | Smith | Brady, Elizabeth #2404 | 7,550 | 42331428 |
| 427294 | Aug 23, 1994 | Aug 23, 1994 | Umc Petroleum Corporation | Andrews | Hancock #6 | 7,500 | 00337541 |
| 425958 | Jul 19, 1994 | Jul 19, 1994 | Umc Petroleum Corporation | Madison | Magness, Ruby #1 | 13,000 | 31330715 |
| 425958Amendment | Jul 19, 1994 | Jul 19, 1994 | Umc Petroleum Corporation | Madison | Magness, Ruby #1 | 13,500 | 31330715 |
| 418347 | Dec 16, 1993 | Dec 16, 1993 | Umc Petroleum Corporation | Smith | Shamburger Lake Unit #2403 | 7,530 | 42331417 |
| 418347Amendment | Dec 16, 1993 | Dec 16, 1993 | Umc Petroleum Corporation | Smith | * Slu ** Elizabeth Brady #2403 | 7,530 | 42331417 |
| 418251 | Nov 22, 1993 | Nov 22, 1993 | Umc Petroleum Corporation | Victoria | Gonzales -C- #1 | 8,868 | 46932659 |
| 417919 | Nov 4, 1993 | Nov 4, 1993 | Umc Petroleum Corporation | Andrews | Munger #1 | 8,000 | 00337376 |
| 417132 | Oct 19, 1993 | Oct 19, 1993 | Umc Petroleum Corporation | Hutchinson | McCloy #3067 | 3,200 | 23332527 |
| 417131 | Oct 19, 1993 | Oct 19, 1993 | Umc Petroleum Corporation | Hutchinson | Pritchard #506 | 3,200 | 23332526 |
| 415265 | Aug 25, 1993 | Aug 25, 1993 | Umc Petroleum Corporation | Andrews | Middleton #1 | 7,200 | 00337326 |
| 414654 | Aug 10, 1993 | Aug 10, 1993 | Umc Petroleum Corporation | Sutton | Johnson, JO Nell "31" #3 | 9,200 | 43534026 |
| 414654Amendment | Aug 10, 1993 | Aug 10, 1993 | Umc Petroleum Corporation | Sutton | Johnson, JO Nell "31" #3 | 9,200 | 43534026 |
| 414399 | Aug 2, 1993 | Aug 2, 1993 | Umc Petroleum Corporation | Hemphill | Young #1766 | 11,500 | 21132034 |
| 414114 | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | State #5156 | 7,600 | 21132030 |
| 414114Amendment | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | State #5156 | 7,600 | 21132030 |
| 414113 | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | Mathers Ranch #46 | 7,600 | 21132031 |
| 414112 | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | Arrington Ranch #8053 | 11,500 | 21132032 |
| 414112Amendment | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | Arrington Ranch #8053 | 11,500 | 21132032 |
| 414111 | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | Arrington Ranch #7053 | 11,500 | 21132033 |
| 414111Amendment | Jul 26, 1993 | Jul 26, 1993 | Umc Petroleum Corporation | Hemphill | Arrington Ranch #7053 | 11,500 | 21132033 |
| 413349 | Jul 5, 1993 | Jul 5, 1993 | Umc Petroleum Corporation | Andrews | Hancock #5 | 7,500 | 00337276 |
| 408161 | Jan 20, 1993 | Jan 20, 1993 | Umc Petroleum Corporation | Andrews | Hancock #4 | 8,000 | 00337186 |
| 405018 | Oct 29, 1992 | Oct 29, 1992 | Umc Petroleum Corporation | Hemphill | Arrington Ranch #9064 | 11,350 | 21131990 |
| 405018Amendment | Oct 29, 1992 | Oct 29, 1992 | Umc Petroleum Corporation | Hemphill | Arrington Ranch #9064 | 11,350 | 21131990 |
| 402278 | Aug 12, 1992 | Aug 12, 1992 | Umc Petroleum Corporation | Andrews | Hancock #3 | 8,000 | 00337113 |
| 401110 | Jul 21, 1992 | Jul 21, 1992 | Umc Petroleum Corporation | Hutchinson | Board #1 | 3,500 | 23385524 |
| 399159 | May 15, 1992 | May 15, 1992 | Umc Petroleum Corporation | Andrews | Hancock #2 | 8,000 | 00337078 |
| 388074 | May 17, 1991 | May 17, 1991 | Umc Petroleum Corporation | Ward | South Monahans Queen Unit #X 2 | 4,000 | 47534075 |
| 388074Amendment | May 17, 1991 | May 17, 1991 | Umc Petroleum Corporation | Ward | South Monahans Queen Unit #X 2 | 4,000 | 47534075 |
| 382544 | Dec 31, 1990 | Dec 31, 1990 | Umc Petroleum Corporation | Hemphill | Little #7030 | 12,300 | 21131934 |
| 380042 | Nov 30, 1990 | Nov 30, 1990 | Umc Petroleum Corporation | Chambers | Mires, J. E. #1 | 13,000 | 07131942 |
| 373929 | Jun 1, 1990 | Jun 1, 1990 | Umc Petroleum Corporation | Hemphill | Little #7030 | 12,300 | 21131934 |
| 372540 | May 3, 1990 | May 3, 1990 | Umc Petroleum Corporation | Calhoun | Levingston #1 | 9,600 | 05731493 |
| 372069 | Apr 13, 1990 | Apr 13, 1990 | Umc Petroleum Corporation | Hemphill | Larue #2044 | 11,500 | 21131931 |
| 372068 | Apr 13, 1990 | Apr 13, 1990 | Umc Petroleum Corporation | Hemphill | Arrington #6053 | 11,500 | 21131930 |
| 372067 | Apr 13, 1990 | Apr 13, 1990 | Umc Petroleum Corporation | Hemphill | State #4156 | 7,500 | 21131932 |