| 479634 | Sep 22, 1998 | Sep 22, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #895 | 12,400 | 17331603 |
| 479545 | Sep 21, 1998 | Sep 21, 1998 | McClure Oil Company, Inc. | Schwartz #1 | 8,000 | 17332901 |
| 479514 | Sep 17, 1998 | Sep 17, 1998 | Range Production Company | Powell "17" #1 | 8,750 | 17332900 |
| 479247 | Sep 8, 1998 | Sep 8, 1998 | Thompson, J. Cleo | Mills Ranch 40 #1AH | 10,500 | 17332654 |
| 479247Amendment | Sep 8, 1998 | Sep 8, 1998 | Thompson, J. Cleo | Mills Ranch 40 #1A | 10,800 | 17332654 |
| 478975 | Aug 25, 1998 | Aug 25, 1998 | Santa FE Energy Resources, Inc. | Pac "5" #1 | 8,600 | 17332898 |
| 478876 | Aug 21, 1998 | Aug 21, 1998 | Arco Permian | Schrock "26" #6 | 9,500 | 17300109 |
| 478843 | Aug 19, 1998 | Aug 19, 1998 | Arco Permian | Driver, J. W. -13- #2 | 9,500 | 17300032 |
| 478635 | Aug 13, 1998 | Aug 13, 1998 | Ventex Operating Corp. | Edb #1 | 10,500 | 17332634 |
| 478314 | Jul 28, 1998 | Jul 28, 1998 | Capataz Operating, Inc. | Wilkerson #1 | 7,600 | 17332896 |
| 477499 | Jul 27, 1998 | Jul 27, 1998 | Exxon Corp. | Hoelscher, Fred J. #1 | 9,980 | 17331674 |
| 478011 | Jul 21, 1998 | Jul 21, 1998 | Arco Permian | Driver, J. W. -36- #10 | 9,400 | 17332895 |
| 478010 | Jul 21, 1998 | Jul 21, 1998 | Arco Permian | Driver, J. W. -36- #9 | 9,400 | 17332894 |
| 477651 | Jul 20, 1998 | Jul 20, 1998 | BTA Oil Producers | 7904 JV-P Hillger "D" #2 | 8,000 | 17332889 |
| 478003 | Jul 17, 1998 | Jul 17, 1998 | Arco Permian | Driver, J. W. -36- #12 | 9,400 | 17332893 |
| 477269 | Jul 16, 1998 | Jul 16, 1998 | BTA Oil Producers | 9802 JV-P Clements #1 | 8,300 | 17332888 |
| 477860 | Jul 15, 1998 | Jul 15, 1998 | BTA Oil Producers | 9204 JV-P Burnstedt #1 | 8,400 | 17332892 |
| 477879 | Jul 13, 1998 | Jul 13, 1998 | Arco Permian | Driver, J. W. "36" #14 | 9,400 | 17332891 |
| 477878 | Jul 13, 1998 | Jul 13, 1998 | Arco Permian | Driver, J. W. "36" #11 | 9,400 | 17332890 |
| 476984 | Jun 12, 1998 | Jun 12, 1998 | Kindred Petroleum Company | Clark, L. C. Est. #1 | 10,965 | 17310035 |
| 476984Amendment | Jun 12, 1998 | Jun 12, 1998 | Kindred Petroleum Company | Clark, L. C. Est. #1 | 10,965 | 17310035 |
| 475864 | Jun 8, 1998 | Jun 8, 1998 | T.G.B., Inc. | Brunson 18 #2 | 8,640 | 17332432 |
| 476766 | Jun 4, 1998 | Jun 4, 1998 | BTA Oil Producers | 9703 JV-P Hightower #4 | 8,000 | 17332887 |
| 475186 | May 19, 1998 | May 19, 1998 | Odessa Exploration, Inc. | Woody, S. O. "B" #1 | 10,348 | 17332063 |
| 476349 | May 18, 1998 | May 18, 1998 | Santa FE Energy Resources, Inc. | Neal, Pac "38" #1 | 10,500 | 17332886 |
| 476175 | May 11, 1998 | May 11, 1998 | Lomak Production Company | Powell "15" #5 | 8,500 | 17332885 |
| 475663 | May 8, 1998 | May 8, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #81A | 8,700 | 17300848 |
| 475454 | Apr 24, 1998 | Apr 24, 1998 | BTA Oil Producers | 7904 JV-P Hillger "D" #1 | 8,000 | 17332884 |
| 474854 | Apr 24, 1998 | Apr 24, 1998 | Mewbourne Oil Co. | Calverley, J. B. Estate #9 | 9,000 | 17332881 |
| 475216 | Apr 10, 1998 | Apr 10, 1998 | BTA Oil Producers | 8102 JV-P Calverley -B- #7 | 8,300 | 17332883 |
| 475142 | Apr 8, 1998 | Apr 8, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1186A | 8,230 | 17300593 |
| 474857 | Mar 31, 1998 | Mar 31, 1998 | Sanchez-O'Brien Oil & Gas Corp. | Hillger, Bert Etal #2 | 8,500 | 17332882 |
| 474684 | Mar 31, 1998 | Mar 31, 1998 | BTA Oil Producers | 9703 JV-P Hightower #3 | 8,000 | 17332880 |
| 474602 | Mar 20, 1998 | Mar 20, 1998 | Mewbourne Oil Co. | Garden City "8" #1 | 9,000 | 17332879 |
| 474601 | Mar 20, 1998 | Mar 20, 1998 | Mewbourne Oil Co. | Garden City "6" #4 | 9,000 | 17332878 |
| 474600 | Mar 20, 1998 | Mar 20, 1998 | Mewbourne Oil Co. | Calverley, J. B. Estate #8 | 9,000 | 17332877 |
| 474600Amendment | Mar 20, 1998 | Mar 20, 1998 | Mewbourne Oil Co. | Calverley, J. B. Estate #8 | 9,000 | 17332877 |
| 474599 | Mar 20, 1998 | Mar 20, 1998 | Mewbourne Oil Co. | Calverley, J. B. Estate #7 | 9,000 | 17332876 |
| 474424 | Mar 17, 1998 | Mar 17, 1998 | Oryx Energy Company | Kloh #47 | 2,900 | 17332871 |
| 474423 | Mar 17, 1998 | Mar 17, 1998 | Oryx Energy Company | Kloh #57 | 2,900 | 17333027 |
| 474422 | Mar 17, 1998 | Mar 17, 1998 | Oryx Energy Company | Kloh #54 | 2,900 | 17333025 |
| 474421 | Mar 17, 1998 | Mar 17, 1998 | Oryx Energy Company | Kloh #52 | 2,900 | 17332874 |
| 474420 | Mar 17, 1998 | Mar 17, 1998 | Oryx Energy Company | Kloh #56 | 2,900 | 17333026 |
| 474244 | Mar 10, 1998 | Mar 10, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #762A | 8,700 | 17300883 |
| 474242 | Mar 10, 1998 | Mar 10, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1127A | 9,000 | 17332869 |
| 474241 | Mar 10, 1998 | Mar 10, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1143A | 9,000 | 17332870 |
| 474110 | Mar 6, 1998 | Mar 6, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #911A | 8,900 | 17332867 |
| 474109 | Mar 6, 1998 | Mar 6, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1117A | 8,900 | 17332868 |
| 473904 | Mar 6, 1998 | Mar 6, 1998 | Bettis, Boyle & Stovall | Garden City "24" #2SD | 5,429 | 17331071 |
| 473356 | Feb 20, 1998 | Feb 20, 1998 | BTA Oil Producers | 9703 JV-P Hightower -A- #1 | 8,100 | 17332865 |
| 473453 | Feb 18, 1998 | Feb 18, 1998 | Dyad Petroleum Company | Powell #4 | 8,060 | 17332866 |
| 472836 | Feb 2, 1998 | Feb 2, 1998 | Oryx Energy Company | West Howard-Glasscock Unit #1506 | 2,500 | 17300506 |
| 472835 | Feb 2, 1998 | Feb 2, 1998 | Oryx Energy Company | West Howard-Glasscock Unit #1509 | 2,500 | 17330085 |
| 472834 | Feb 2, 1998 | Feb 2, 1998 | Oryx Energy Company | West Howard-Glasscock Unit #1610 | 2,500 | 17330083 |
| 472833 | Feb 2, 1998 | Feb 2, 1998 | Oryx Energy Company | West Howard-Glasscock Unit #1611 | 2,500 | 17330084 |
| 472820 | Jan 30, 1998 | Jan 30, 1998 | BTA Oil Producers | 9703 JV-P Hightower #2 | 8,000 | 17332864 |
| 472692 | Jan 27, 1998 | Jan 27, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1476A | 8,200 | 17332863 |
| 472627 | Jan 26, 1998 | Jan 26, 1998 | Trend Exploration Company | Powell "2D" #43D | 8,800 | 17332862 |
| 472540 | Jan 22, 1998 | Jan 22, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #407A | 8,600 | 17332861 |
| 472405 | Jan 20, 1998 | Jan 20, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1475A | 8,200 | 17332860 |
| 472404 | Jan 20, 1998 | Jan 20, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #408A | 8,600 | 17332859 |
| 472403 | Jan 20, 1998 | Jan 20, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #332A | 8,700 | 17332858 |
| 471979 | Jan 8, 1998 | Jan 8, 1998 | Trend Exploration Company | Powell "11F" #73D | 8,800 | 17332856 |
| 471815 | Jan 2, 1998 | Jan 2, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1443A | 8,600 | 17332855 |
| 471814 | Jan 2, 1998 | Jan 2, 1998 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1444A | 8,600 | 17332854 |
| 471396 | Dec 29, 1997 | Dec 29, 1997 | Terrace Petroleum Corporation | Tom Ranch "48" #1 | 9,900 | 17332853 |
| 471630 | Dec 23, 1997 | Dec 23, 1997 | Tmbr/Sharp Drilling, Inc. | Glass "34" #1 | 8,300 | 17332511 |
| 471158 | Dec 12, 1997 | Dec 12, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1076A | 8,600 | 17332852 |
| 471050 | Dec 10, 1997 | Dec 10, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #901A | 8,330 | 17332851 |
| 471048 | Dec 10, 1997 | Dec 10, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #618A | 8,530 | 17332849 |
| 470605 | Nov 26, 1997 | Nov 26, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #824A | 9,000 | 17332650 |
| 470435 | Nov 21, 1997 | Nov 21, 1997 | Pioneer Natural Res. USA, Inc. | Cox, C. J. "A" #1H | 7,623 | 17300633 |
| 470098 | Nov 17, 1997 | Nov 17, 1997 | Terrace Petroleum Corporation | Tom Ranch "41" #1 | 10,300 | 17332847 |
| 470134 | Nov 14, 1997 | Nov 14, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #902A | 8,270 | 17332846 |
| 470036 | Nov 12, 1997 | Nov 12, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #819A | 8,510 | 17332844 |
| 470035 | Nov 12, 1997 | Nov 12, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #818A | 8,530 | 17332845 |
| 469473 | Nov 12, 1997 | Nov 12, 1997 | Dyad Petroleum Company | Becknell "A" #1 | 7,950 | 17332836 |
| 469730 | Nov 6, 1997 | Nov 6, 1997 | BTA Oil Producers | 9703 JV-P Hightower #1 | 8,000 | 17332843 |
| 469605 | Nov 3, 1997 | Nov 3, 1997 | Pioneer Natural Res. USA, Inc. | Sprabery Driver Unit #236A | 8,400 | 17332841 |
| 469604 | Nov 3, 1997 | Nov 3, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #235A | 8,430 | 17332842 |
| 469559 | Nov 3, 1997 | Nov 3, 1997 | Mewbourne Oil Co. | Calverley "A" #7 | 8,200 | 17332839 |
| 469559Amendment | Nov 3, 1997 | Nov 3, 1997 | Mewbourne Oil Co. | Calverley "A" #7 | 8,300 | 17332839 |
| 469558 | Nov 3, 1997 | Nov 3, 1997 | Mewbourne Oil Co. | Calverley "A" #8 | 8,200 | 17332840 |
| 469500 | Oct 30, 1997 | Oct 30, 1997 | Mewbourne Oil Co. | Garden City "6" #3 | 8,200 | 17332838 |
| 469500Amendment | Oct 30, 1997 | Oct 30, 1997 | Mewbourne Oil Co. | Garden City "6" #3 | 8,500 | 17332838 |
| 469499 | Oct 30, 1997 | Oct 30, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #617A | 8,530 | 17332837 |
| 469132 | Oct 28, 1997 | Oct 28, 1997 | Exxon Corp. | Edwin J. Bednar Oil Unit #1 | 10,500 | 17331724 |
| 468428 | Oct 27, 1997 | Oct 27, 1997 | El Paso Natural Gas Co. | Rectifier, C. P. #1622CP | 600 | 17332829 |
| 469203 | Oct 23, 1997 | Oct 23, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1104A | 8,450 | 17332832 |
| 469202 | Oct 23, 1997 | Oct 23, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1103A | 8,450 | 17332833 |
| 469200 | Oct 23, 1997 | Oct 23, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1102A | 8,450 | 17332834 |
| 469198 | Oct 23, 1997 | Oct 23, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1101A | 8,480 | 17332835 |
| 468236 | Oct 17, 1997 | Oct 17, 1997 | BTA Oil Producers | 8102 JV-P Calverley -B- #6 | 8,300 | 17332827 |
| 468879 | Oct 15, 1997 | Oct 15, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #562A | 8,700 | 17332830 |
| 468878 | Oct 15, 1997 | Oct 15, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #564A | 8,700 | 17332831 |
| 468260 | Oct 8, 1997 | Oct 8, 1997 | Elita, Inc. | Bryans Farms #3A | 5,600 | 17332828 |
| 467977 | Sep 25, 1997 | Sep 25, 1997 | Terrace Petroleum Corporation | Tom Ranch "42" #1 | 9,900 | 17332826 |
| 468006 | Sep 24, 1997 | Sep 24, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #563A | 8,660 | 17332825 |
| 467989 | Sep 24, 1997 | Sep 24, 1997 | Santa FE Energy Resources, Inc. | Pac "31" #1 | 10,150 | 17332824 |
| 467657 | Sep 16, 1997 | Sep 16, 1997 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1414A | 8,380 | 17332823 |