| 518894Amendment | Apr 8, 2002 | Apr 8, 2002 | Union Oil Company of California | Van Zandt | Bracken, J.A. 503 #15 | 2,100 | 46730839 |
| 518893 | Apr 8, 2002 | Apr 8, 2002 | Union Oil Company of California | Van Zandt | Thompson, I. W. 401 #27 | 2,450 | 46730958 |
| 518892 | Apr 8, 2002 | Apr 8, 2002 | Union Oil Company of California | Van Zandt | Thompson, I. W. 401 #4 | 2,800 | 46700615 |
| 518891 | Apr 8, 2002 | Apr 8, 2002 | Union Oil Company of California | Van Zandt | Smith, L. A. 103 #8 | 2,300 | 46730690 |
| 518568 | Mar 25, 2002 | Mar 25, 2002 | Union Oil Company of California | Mustang IS-LB | S.T.749-L S/2 NE/4 #1 | 14,897 | 70230253 |
| 518169 | Mar 8, 2002 | Mar 8, 2002 | Union Oil Company of California | Van Zandt | Bracken, J. A. 503 #3 | 2,700 | 46700605 |
| 518137 | Mar 7, 2002 | Mar 7, 2002 | Union Oil Company of California | Freestone | Dubose-Williford #1 | 12,000 | 16132320 |
| 518137Amendment | Mar 7, 2002 | Mar 7, 2002 | Union Oil Company of California | Freestone | Dubose-Williford #1 | 12,000 | 16132320 |
| 518070 | Mar 5, 2002 | Mar 5, 2002 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #3 | 2,972 | 46700976 |
| 518059 | Mar 5, 2002 | Mar 5, 2002 | Union Oil Company of California | Mustang IS-LB | S.T. 746-L SW/4 #1 | 15,500 | 70230261 |
| 518059Amendment | Mar 5, 2002 | Mar 5, 2002 | Union Oil Company of California | Mustang IS-LB | S.T. 747-L SE/4 #1 | 15,500 | 70230261 |
| 518016 | Mar 1, 2002 | Mar 1, 2002 | Union Oil Company of California | Mustang IS-SB | State Tract 904 Gas Unit #7 | 12,500 | 60230197 |
| 517823 | Feb 22, 2002 | Feb 22, 2002 | Union Oil Company of California | Van Zandt | Jaman, W. T. 37 #16 | 2,600 | 46730672 |
| 517634 | Feb 14, 2002 | Feb 14, 2002 | Union Oil Company of California | Van Zandt | Bracken, J. A. 503 #9 | 2,700 | 46730718 |
| 517219 | Jan 30, 2002 | Jan 30, 2002 | Union Oil Company of California | Upshur | Chappell Lease #1 | 12,000 | 45931102 |
| 517219Amendment | Jan 30, 2002 | Jan 30, 2002 | Union Oil Company of California | Upshur | Chappell Lease #1 | 12,000 | 45931102 |
| 517112 | Jan 25, 2002 | Jan 25, 2002 | Union Oil Company of California | Van Zandt | White, R. V. 502 #7 | 2,300 | 46730683 |
| 517013 | Jan 22, 2002 | Jan 22, 2002 | Union Oil Company of California | Van Zandt | Swain, O. L. 11B #19 | 2,300 | 46730845 |
| 516658 | Jan 8, 2002 | Jan 8, 2002 | Union Oil Company of California | Henderson | Williams, Margaret #1 | 12,500 | 21330845 |
| 516104 | Dec 13, 2001 | Dec 13, 2001 | Union Oil Company of California | Van Zandt | Swain, O. L. 11B #20 | 2,900 | 46730846 |
| 515634 | Nov 27, 2001 | Nov 27, 2001 | Union Oil Company of California | Henderson | Trinity Materials #2 | 12,000 | 21330843 |
| 515634Amendment | Nov 27, 2001 | Nov 27, 2001 | Union Oil Company of California | Henderson | Trinity Materials #2 | 12,000 | 21330843 |
| 514807 | Oct 29, 2001 | Oct 29, 2001 | Union Oil Company of California | Henderson | Trinity Materials #1 | 12,500 | 21330839 |
| 513263 | Aug 31, 2001 | Aug 31, 2001 | Union Oil Company of California | Mustang IS-SB | State Tract 904 Gas Unit #5 | 12,000 | 60230194 |
| 513262 | Aug 31, 2001 | Aug 31, 2001 | Union Oil Company of California | Mustang IS-SB | State Tract 904 Gas Unit #6 | 15,500 | 60230195 |
| 513261 | Aug 31, 2001 | Aug 31, 2001 | Union Oil Company of California | Mustang IS-LB | S.T. 773-L N/2 NE/4 #1 | 11,700 | 70230258 |
| 513261Amendment | Aug 31, 2001 | Aug 31, 2001 | Union Oil Company of California | Mustang IS-LB | S.T. 773-L N/2 NE/4 #1 | 11,700 | 70230258 |
| 512564 | Aug 14, 2001 | Aug 14, 2001 | Union Oil Company of California | Van Zandt | Peters, R. H. 29 #3 | 2,900 | 46700187 |
| 512558 | Aug 14, 2001 | Aug 14, 2001 | Union Oil Company of California | Van Zandt | Leonard, J. H. 30 #5 | 2,900 | 46700528 |
| 510212 | Jul 9, 2001 | Jul 9, 2001 | Union Oil Company of California | Van Zandt | Svruc Unit #2911 | 5,280 | 46731036 |
| 510813 | Jun 27, 2001 | Jun 27, 2001 | Union Oil Company of California | Van Zandt | Brawner, L. M. 10 #26 | 2,900 | 46731039 |
| 510813Amendment | Jun 27, 2001 | Jun 27, 2001 | Union Oil Company of California | Van Zandt | Brawner, L. M. 10 #26 | 2,900 | 46731039 |
| 510211 | Jun 12, 2001 | Jun 12, 2001 | Union Oil Company of California | Van Zandt | Swain, O. L. 11B #23 | 2,900 | 46730963 |
| 510210 | Jun 12, 2001 | Jun 12, 2001 | Union Oil Company of California | Van Zandt | Swain, O. L. 11B #4 | 2,924 | 46700516 |
| 510209 | Jun 12, 2001 | Jun 12, 2001 | Union Oil Company of California | Van Zandt | Howell, D. R. 45 #3A | 2,400 | 46700877 |
| 509867 | Jun 5, 2001 | Jun 5, 2001 | Union Oil Company of California | Calhoun | Aquamarine Unit #1 | 13,000 | 05731600 |
| 508688 | May 8, 2001 | May 8, 2001 | Union Oil Company of California | Van Zandt | Tunnell, A.R.'59' #16A | 3,019 | 46730587 |
| 508026 | Apr 20, 2001 | Apr 20, 2001 | Union Oil Company of California | Van Zandt | Howell, D. R. 45 #9 | 2,600 | 46730619 |
| 507355 | Apr 3, 2001 | Apr 3, 2001 | Union Oil Company of California | Van Zandt | Howell, D. R. 45 #6 | 2,100 | 46700878 |
| 507354 | Apr 3, 2001 | Apr 3, 2001 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #6 | 2,230 | 46700975 |
| 506968 | Mar 26, 2001 | Mar 26, 2001 | Union Oil Company of California | Van Zandt | Maxfield, A. G. 38 #18H | 2,810 | 46731051 |
| 505722 | Feb 23, 2001 | Feb 23, 2001 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #10 | 2,200 | 46730739 |
| 505721 | Feb 23, 2001 | Feb 23, 2001 | Union Oil Company of California | Van Zandt | Howell, D. R. 45 #7 | 2,100 | 46700875 |
| 505720 | Feb 23, 2001 | Feb 23, 2001 | Union Oil Company of California | Van Zandt | Cook, W. H. 42 #2 | 2,200 | 46700982 |
| 505719 | Feb 23, 2001 | Feb 23, 2001 | Union Oil Company of California | Van Zandt | Cook, W. H. 42 #9 | 2,250 | 46730688 |
| 505718 | Feb 23, 2001 | Feb 23, 2001 | Union Oil Company of California | Van Zandt | Thompson, I. W. 401 #21 | 2,060 | 46730834 |
| 504609 | Jan 26, 2001 | Jan 26, 2001 | Union Oil Company of California | Van Zandt | Howell, D. R. 45 #13 | 2,130 | 46730794 |
| 504608 | Jan 26, 2001 | Jan 26, 2001 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #9 | 2,150 | 46730705 |
| 504487 | Jan 24, 2001 | Jan 24, 2001 | Union Oil Company of California | Mustang IS-SB | State Tract 904 Gas Unit #4 | 10,700 | 60230191 |
| 504487Amendment | Jan 24, 2001 | Jan 24, 2001 | Union Oil Company of California | Mustang IS-SB | State Tract 904 Gas Unit #4 | 12,500 | 60230191 |
| 504479 | Jan 24, 2001 | Jan 24, 2001 | Union Oil Company of California | Van Zandt | Petty, J. T. 39 #1 | 2,500 | 46700208 |
| 504478 | Jan 24, 2001 | Jan 24, 2001 | Union Oil Company of California | Van Zandt | Jarman, W. T. 37 #20 | 2,050 | 46730861 |
| 502712 | Jan 16, 2001 | Jan 16, 2001 | Union Oil Company of California | Van Zandt | Cook, W. H. 42 #10 | 2,250 | 46730747 |
| 502710 | Jan 16, 2001 | Jan 16, 2001 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #4 | 2,150 | 46700973 |
| 502709 | Jan 16, 2001 | Jan 16, 2001 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #11 | 2,225 | 46730771 |
| 503853 | Jan 9, 2001 | Jan 9, 2001 | Union Oil Company of California | Van Zandt | Tunnell, I. P. 300 #15 | 2,350 | 46730830 |
| 503596 | Jan 9, 2001 | Jan 9, 2001 | Union Oil Company of California | Van Zandt | Jarman, W. T. 37 #7 | 2,600 | 46700219 |
| 502283 | Nov 22, 2000 | Nov 22, 2000 | Union Oil Company of California | Van Zandt | Jarman, W. 37 #30H | 4,287 | 46731048 |
| 502252 | Nov 21, 2000 | Nov 21, 2000 | Union Oil Company of California | Mustang IS-LB | S.T. 748-L N/2 SW/4 #1 | 13,600 | 70230254 |
| 502250 | Nov 21, 2000 | Nov 21, 2000 | Union Oil Company of California | Mustang IS-LB | S.T. 749-L S/2 NE/4 #1 | 15,200 | 70230253 |
| 501047 | Oct 20, 2000 | Oct 20, 2000 | Union Oil Company of California | Van Zandt | Swain, O. L. 11 "B" #15 | 2,030 | 46730707 |
| 501046 | Oct 20, 2000 | Oct 20, 2000 | Union Oil Company of California | Van Zandt | Thompson, I. W. 401 #27 | 2,150 | 46730958 |
| 498697 | Aug 23, 2000 | Aug 23, 2000 | Union Oil Company of California | Van Zandt | Tunnell, I. P. 300 #15 | 1,950 | 46730830 |
| 498696 | Aug 23, 2000 | Aug 23, 2000 | Union Oil Company of California | Van Zandt | Shivers, J. R. 12 #12 | 1,950 | 46730825 |
| 498695 | Aug 23, 2000 | Aug 23, 2000 | Union Oil Company of California | Van Zandt | Jarman, W. T. 37 #21 | 1,950 | 46730919 |
| 498694 | Aug 23, 2000 | Aug 23, 2000 | Union Oil Company of California | Van Zandt | Maxfield, A. G. 38 #12 | 2,050 | 46730636 |
| 498694Amendment | Aug 23, 2000 | Aug 23, 2000 | Union Oil Company of California | Van Zandt | Maxfield, A. G. 38 #12 | 2,250 | 46730636 |
| 498387 | Aug 11, 2000 | Aug 11, 2000 | Union Oil Company of California | Van Zandt | Thompson, I. W. 401 #22 | 1,900 | 46730847 |
| 496959 | Jul 28, 2000 | Jul 28, 2000 | Union Oil Company of California | Van Zandt | York, Ella 102 #204 | 2,100 | 46780194 |
| 496308 | Jun 21, 2000 | Jun 21, 2000 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #12 | 2,100 | 46730970 |
| 496308Amendment | Jun 21, 2000 | Jun 21, 2000 | Union Oil Company of California | Van Zandt | Gilbert, H. C. 43 #12 | 2,300 | 46730970 |
| 495979 | Jun 8, 2000 | Jun 8, 2000 | Union Oil Company of California | Van Zandt | Oliver, J. R. 207 #7 | 3,200 | 46731043 |
| 495979Amendment | Jun 8, 2000 | Jun 8, 2000 | Union Oil Company of California | Van Zandt | Oliver, J. R. 207 #7 | 3,200 | 46731043 |
| 495979Amendment | Jun 8, 2000 | Jun 8, 2000 | Union Oil Company of California | Van Zandt | Oliver, J. R. 207 #7 | 3,400 | 46731043 |
| 495860 | Jun 7, 2000 | Jun 7, 2000 | Union Oil Company of California | Van Zandt | Thompson, I. W. 401 #26 | 2,100 | 46730911 |
| 494526 | Jun 6, 2000 | Jun 6, 2000 | Union Oil Company of California | Van Zandt | Brawner, L. M. 10 #26 | 3,200 | 46731039 |
| 495842 | Jun 5, 2000 | Jun 5, 2000 | Union Oil Company of California | Van Zandt | Miller, I. D. 34 #11H | 3,517 | 46731042 |
| 495538 | Jun 1, 2000 | Jun 1, 2000 | Union Oil Company of California | Van Zandt | Thompson, J. T. 49 #14 | 2,100 | 46730812 |
| 495539 | May 31, 2000 | May 31, 2000 | Union Oil Company of California | Van Zandt | Wells, R. L. 47 #27 | 2,100 | 46730935 |
| 495587 | May 26, 2000 | May 26, 2000 | Union Oil Company of California | Van Zandt | Fowler, E. L. 302 #16 | 2,100 | 46730686 |
| 495587Amendment | May 26, 2000 | May 26, 2000 | Union Oil Company of California | Van Zandt | Fowler, E. L. "302" #16 | 2,502 | 46730686 |
| 495352 | May 25, 2000 | May 25, 2000 | Union Oil Company of California | Winkler | Keystone Gsu #2D | 5,100 | 49532799 |
| 495297 | May 22, 2000 | May 22, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1113 | 7,400 | 16535533 |
| 495296 | May 22, 2000 | May 22, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1112 | 7,400 | 16535532 |
| 495294 | May 22, 2000 | May 22, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1092 | 7,400 | 16535531 |
| 495241 | May 18, 2000 | May 18, 2000 | Union Oil Company of California | Van Zandt | Bracken, J. A. 35 #19 | 2,150 | 46730957 |
| 495175 | May 17, 2000 | May 17, 2000 | Union Oil Company of California | Van Zandt | Tunnell, I. P. 300 #11 | 2,150 | 46730768 |
| 495123 | May 16, 2000 | May 16, 2000 | Union Oil Company of California | Van Zandt | White, W. H. 501 #6 | 2,150 | 46730637 |
| 494805 | May 9, 2000 | May 9, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1099 | 7,400 | 16535525 |
| 494804 | May 9, 2000 | May 9, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1095 | 7,400 | 16535524 |
| 494783 | May 5, 2000 | May 5, 2000 | Union Oil Company of California | Van Zandt | Murphree, J. 31 #16H | 2,650 | 46731040 |
| 494631 | May 2, 2000 | May 2, 2000 | Union Oil Company of California | Pecos | Reed "17" #1 | 12,300 | 37136992 |
| 494253 | Apr 19, 2000 | Apr 19, 2000 | Union Oil Company of California | Van Zandt | Shivers, J. R. 12 #15 | 5,430 | 46731038 |
| 494253Amendment | Apr 19, 2000 | Apr 19, 2000 | Union Oil Company of California | Van Zandt | Shivers, J. R. 12 #15 | 5,430 | 46731038 |
| 494057 | Apr 14, 2000 | Apr 14, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1101 | 7,400 | 16535512 |
| 494056 | Apr 14, 2000 | Apr 14, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1100 | 7,400 | 16535514 |
| 494055 | Apr 14, 2000 | Apr 14, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1094 | 7,400 | 16535513 |
| 493807 | Apr 6, 2000 | Apr 6, 2000 | Union Oil Company of California | Gaines | North Riley Unit #1093 | 7,400 | 16535510 |
| 493569 | Mar 29, 2000 | Mar 29, 2000 | Union Oil Company of California | Pecos | Trees Estate "33" #1 | 6,700 | 37136990 |
| 493090 | Mar 16, 2000 | Mar 16, 2000 | Union Oil Company of California | Andrews | Parker Unit #4411A | 9,823 | 00337788 |