| 602933 | Jul 5, 2005 | Jul 5, 2005 | Anderson Oil Ltd | Heller, Walter E., et Al #102500068 | 6,950 |
| 602831 | Jun 30, 2005 | Jun 30, 2005 | Charro Operating, L.L.C. | Lazy F #902533349 | 5,500 |
| 602549 | Jun 27, 2005 | Jun 27, 2005 | Petrohawk Operating Company | Heard, C.E. "B" #1902533348 | 5,000 |
| 602549Amendment | Jun 27, 2005 | Jun 27, 2005 | Petrohawk Operating Company | Heard, C. E. "B" #1902533348 | 5,020 |
| 602486 | Jun 23, 2005 | Jun 23, 2005 | Tidal Petroleum, Inc. | Grissom #302533347 | 10,500 |
| 602245 | Jun 20, 2005 | Jun 20, 2005 | Pioneer Natural Res. USA, Inc. | Schroeder GU #4H02533346 | 17,000 |
| 602245Amendment | Jun 20, 2005 | Jun 20, 2005 | Pioneer Natural Res. USA, Inc. | Schroeder GU #4H02533346 | 17,000 |
| 601893 | Jun 16, 2005 | Jun 16, 2005 | Pioneer Natural Res. USA, Inc. | Tomasek GU #8H02533345 | 17,000 |
| 601708 | Jun 8, 2005 | Jun 8, 2005 | Salida Exploration, LLC | Thomson-Barrow #302533343 | 5,500 |
| 601475 | Jun 1, 2005 | Jun 1, 2005 | Tidal Petroleum, Inc. | Grissom #202533342 | 10,500 |
| 601072 | May 23, 2005 | May 23, 2005 | Rincon Petroleum Corporation | J.C. Byles Unit #302533341 | 10,900 |
| 600807 | May 17, 2005 | May 17, 2005 | Dominion Oklahoma Texas E&P, Inc | Dominion Fee #202533340 | 12,000 |
| 600807Amendment | May 17, 2005 | May 17, 2005 | Dominion Oklahoma Texas E&P, Inc | Dominion Fee #202533340 | 12,000 |
| 600658 | May 16, 2005 | May 16, 2005 | Tidal Petroleum, Inc. | Tuleta Gas Unit #102533339 | 10,500 |
| 600467 | May 11, 2005 | May 11, 2005 | Pioneer Natural Res. USA, Inc. | Turner GU #11H02533338 | 16,500 |
| 600432 | May 10, 2005 | May 10, 2005 | Pioneer Natural Res. USA, Inc. | Turner GU #10H02533337 | 16,500 |
| 600266 | May 10, 2005 | May 10, 2005 | Pioneer Natural Res. USA, Inc. | Mansker Ranch GU #3H02533336 | 17,000 |
| 600098 | May 3, 2005 | May 3, 2005 | Anderson Oil Ltd | Eberstadt #502533334 | 5,900 |
| 600094 | May 3, 2005 | May 3, 2005 | Welder Exploration & Prod., Inc. | Traylor #102533335 | 7,000 |
| 561210 | Apr 28, 2005 | Apr 28, 2005 | Wofford, C. J. | South Texas Childrens Home #402533333 | 4,100 |
| 561065 | Apr 26, 2005 | Apr 26, 2005 | Enco Exploration Company | Collier #502533332 | 5,500 |
| 545576Amendment | Apr 26, 2005 | Apr 26, 2005 | Devon Energy Production Co, L.P. | Ray #10802533222 | 9,900 |
| 560992 | Apr 22, 2005 | Apr 22, 2005 | Magnum Engineering Company | Algea Gas Unit #302532776 | 10,600 |
| 560992Amendment | Apr 22, 2005 | Apr 22, 2005 | Magnum Engineering Company | Algea Gas Unit #302532776 | 10,600 |
| 560813 | Apr 20, 2005 | Apr 20, 2005 | Hughes, Dan A. Company | Borroum #302533330 | 12,500 |
| 560539 | Apr 15, 2005 | Apr 15, 2005 | Halex Oil Corporation | McFall-Kerby #102532096 | 7,120 |
| 560484 | Apr 15, 2005 | Apr 15, 2005 | Pioneer Natural Res. USA, Inc. | Gordon Gas Unit #8H02533331 | 17,000 |
| 559952 | Apr 15, 2005 | Apr 15, 2005 | Staples, James W. Prod. Co. | Davis, Nellie S., et Al #102533173 | 4,300 |
| 560349 | Apr 13, 2005 | Apr 13, 2005 | Pioneer Natural Res. USA, Inc. | Turner Gas Unit #9H02533329 | 17,000 |
| 559976 | Apr 6, 2005 | Apr 6, 2005 | Pioneer Natural Res. USA, Inc. | O'Neal Gas Unit #11H02533328 | 16,200 |
| 559714 | Mar 30, 2005 | Mar 30, 2005 | Tidal Petroleum, Inc. | Grissom #102533327 | 10,500 |
| 559714Amendment | Mar 30, 2005 | Mar 30, 2005 | Tidal Petroleum, Inc. | Grissom #102533327 | 10,500 |
| 559233 | Mar 23, 2005 | Mar 23, 2005 | San Isidro Development Co, L. C. | Dirks-Hatch #102533326 | 4,100 |
| 559088 | Mar 18, 2005 | Mar 18, 2005 | Enco Exploration Company | Collier #T 202502746 | 3,853 |
| 558915 | Mar 17, 2005 | Mar 17, 2005 | Enco Exploration Company | Collier #402533324 | 5,500 |
| 559040 | Mar 15, 2005 | Mar 15, 2005 | Sanchez Oil & Gas Corporation | Mutchler Unit #102533325 | 14,500 |
| 558712 | Mar 8, 2005 | Mar 8, 2005 | Hughes, Dan A. Company | Strauch #102533323 | 13,000 |
| 558491 | Mar 7, 2005 | Mar 7, 2005 | West Tuleta Operating Corp. | Wtu Robinson #502533322 | 9,000 |
| 558431 | Mar 2, 2005 | Mar 2, 2005 | Hollimon Oil Corporation | Edler, J. B. #2502533321 | 5,700 |
| 558047 | Feb 24, 2005 | Feb 24, 2005 | Staples, James W. | Moore, Lon S #102531593 | 3,710 |
| 557749 | Feb 17, 2005 | Feb 17, 2005 | Pioneer Natural Res. USA, Inc. | O'Neal Gas Unit #8H02533197 | 17,000 |
| 557749Amendment | Feb 17, 2005 | Feb 17, 2005 | Pioneer Natural Res. USA, Inc. | O'Neal Gas Unit #8H02533197 | 17,000 |
| 557738 | Feb 16, 2005 | Feb 16, 2005 | Pioneer Natural Res. USA, Inc. | Leppard GU #2H02533320 | 16,800 |
| 557634 | Feb 14, 2005 | Feb 14, 2005 | Morris, W. Dale Inc. | Zuniga Gas Unit #1H02533319 | 13,500 |
| 557634Amendment | Feb 14, 2005 | Feb 14, 2005 | Morris, W. Dale Inc. | Zuniga Gas Unit #1H02533319 | 16,000 |
| 557329 | Feb 7, 2005 | Feb 7, 2005 | Hughes, Dan A. Company | Riley #102533318 | 13,000 |
| 556948 | Feb 1, 2005 | Feb 1, 2005 | Pioneer Natural Res. USA, Inc. | Bues GU #12H02533317 | 16,800 |
| 557020 | Jan 31, 2005 | Jan 31, 2005 | Erskine Energy, LLC | Barrow #102533316 | 17,000 |
| 557020Amendment | Jan 31, 2005 | Jan 31, 2005 | Erskine Energy, LLC | Barrow #102533316 | 17,000 |
| 556822 | Jan 31, 2005 | Jan 31, 2005 | Inland Ocean, Inc. | Dirks-Withers #102532297 | 2,320 |
| 556897 | Jan 27, 2005 | Jan 27, 2005 | Double Play Oil & Gas, Inc | Huffman #102533315 | 3,499 |
| 555900 | Jan 27, 2005 | Jan 27, 2005 | Staples, James W. | Stoltzfus Estate #202530357 | 3,216 |
| 556608 | Jan 26, 2005 | Jan 26, 2005 | Inland Ocean, Inc. | Dirks #202533312 | 3,600 |
| 556731 | Jan 25, 2005 | Jan 25, 2005 | Proton Energy, L.L.C. | Heard, C.E. "B" #2002533313 | 5,000 |
| 556730 | Jan 25, 2005 | Jan 25, 2005 | Proton Energy, L.L.C. | Heard, C. E. "B' #2102533314 | 5,000 |
| 556730Amendment | Jan 25, 2005 | Jan 25, 2005 | Petrohawk Operating Company | Heard, C. E. "B' #2102533314 | 5,000 |
| 555094 | Dec 27, 2004 | Dec 27, 2004 | Salida Exploration, LLC | Thomson-Barrow Corp. #102533310 | 6,200 |
| 555094Amendment | Dec 27, 2004 | Dec 27, 2004 | Salida Exploration, LLC | Thomson-Barrow Corp. #102533310 | 6,200 |
| 555113 | Dec 22, 2004 | Dec 22, 2004 | West Tuleta Operating Corp. | Dah Hall #102533259 | 9,630 |
| 554506 | Dec 10, 2004 | Dec 10, 2004 | Enco Exploration Company | Collier #302533309 | 10,500 |
| 554412 | Dec 6, 2004 | Dec 6, 2004 | Kaler Energy Corp | Carpenter #102533308 | 10,000 |
| 553992 | Nov 22, 2004 | Nov 22, 2004 | Wofford, C. J. | Sparkman Unit #302533307 | 4,100 |
| 553963 | Nov 22, 2004 | Nov 22, 2004 | Anderson Oil Ltd | Ingram #102533306 | 3,700 |
| 553436 | Nov 9, 2004 | Nov 9, 2004 | Hughes, Dan A. Company | Eberstadt #2ST02533261 | 10,500 |
| 553182 | Nov 3, 2004 | Nov 3, 2004 | Strand Energy, L.C. | Lunday #102533305 | 3,300 |
| 552651 | Oct 21, 2004 | Oct 21, 2004 | Hughes, Dan A. Company | Helm-Arburn Unit #102533304 | 13,000 |
| 551502 | Oct 21, 2004 | Oct 21, 2004 | Enco Exploration Company | Long "Y" #1102533297 | 5,500 |
| 552345 | Oct 15, 2004 | Oct 15, 2004 | Welder Exploration & Prod., Inc. | Welder, R J #1C02533303 | 7,000 |
| 552135 | Oct 14, 2004 | Oct 14, 2004 | Enco Exploration Company | Collier #202533302 | 5,000 |
| 551875 | Oct 7, 2004 | Oct 7, 2004 | Devon Energy Production Co, L.P. | Npu (Ray 106) #4102533239 | 11,600 |
| 551993 | Oct 6, 2004 | Oct 6, 2004 | Kaler Energy Corp | Holzmark #A 102533301 | 9,200 |
| 551953 | Oct 6, 2004 | Oct 6, 2004 | Anderson Oil Ltd | Eberstadt #402533300 | 6,800 |
| 551900 | Oct 5, 2004 | Oct 5, 2004 | Proton Energy, L.L.C. | Heard, C.E. "B" #1702532325 | 3,700 |
| 551898 | Oct 5, 2004 | Oct 5, 2004 | Welder Exploration & Prod., Inc. | Sugarek #102533299 | 4,600 |
| 551636 | Sep 29, 2004 | Sep 29, 2004 | Dominion Oklahoma Texas E&P, Inc | Dominion Fee #102533298 | 12,500 |
| 551410 | Sep 24, 2004 | Sep 24, 2004 | Pioneer Natural Res. USA, Inc. | Schroeder G. U. #3H02533296 | 17,000 |
| 551425 | Sep 23, 2004 | Sep 23, 2004 | Aurora Resources Corporation | Brinkooeter, H C #202500632 | 7,561 |
| 551340 | Sep 22, 2004 | Sep 22, 2004 | Pioneer Natural Res. USA, Inc. | Winnie Madge Going Gas Unit #2H02533295 | 17,000 |
| 551226 | Sep 20, 2004 | Sep 20, 2004 | Pioneer Natural Res. USA, Inc. | Hoyt Gentry Gas Unit #1H02533294 | 16,500 |
| 550776 | Sep 15, 2004 | Sep 15, 2004 | Republic Resources, LLC. | Staples, J., Jr. #302533070 | 4,500 |
| 550973 | Sep 14, 2004 | Sep 14, 2004 | Rincon Petroleum Corporation | J C Byles Unit #202533293 | 11,000 |
| 550973Amendment | Sep 14, 2004 | Sep 14, 2004 | Rincon Petroleum Corporation | J. C. Byles Unit #202533293 | 11,000 |
| 550770 | Sep 13, 2004 | Sep 13, 2004 | Enco Exploration Company | Collier #102533292 | 5,000 |
| 550562 | Sep 8, 2004 | Sep 8, 2004 | Pioneer Natural Res. USA, Inc. | G. W. Currer #202533291 | 9,000 |
| 550391 | Sep 1, 2004 | Sep 1, 2004 | Hughes, Dan A. Company | Milster Ranch #102533290 | 12,000 |
| 550390 | Sep 1, 2004 | Sep 1, 2004 | Hughes, Dan A. Company | Luker #102533289 | 12,000 |
| 550223 | Sep 1, 2004 | Sep 1, 2004 | Hyquest Energy, Inc. | Hanus #102533288 | 4,600 |
| 549584 | Aug 20, 2004 | Aug 20, 2004 | Welder Exploration & Prod., Inc. | Welder, R. J. "A" #1A02533286 | 4,600 |
| 549583 | Aug 19, 2004 | Aug 19, 2004 | Welder Exploration & Prod., Inc. | Welder, R. J. "B" #2 B02533285 | 4,600 |
| 549696 | Aug 17, 2004 | Aug 17, 2004 | Prime Operating Company | Chandler Gas Unit #102532922 | 8,650 |
| 549231 | Aug 12, 2004 | Aug 12, 2004 | Welder Exploration & Prod., Inc. | Welder, R. J. #3B02533283 | 4,600 |
| 549257 | Aug 6, 2004 | Aug 6, 2004 | Devon Energy Production Co, L.P. | BU Tom Slick #302533284 | 12,000 |
| 549087 | Aug 3, 2004 | Aug 3, 2004 | Hughes, Dan A. Company | Weathersbee, Julia #102533282 | 16,000 |
| 549087Amendment | Aug 3, 2004 | Aug 3, 2004 | Hughes, Dan A. Company | Weathersbee, Julia #102533282 | 17,000 |
| 549087Amendment | Aug 3, 2004 | Aug 3, 2004 | Hughes, Dan A. Company | Weathersbee, Julia #102533282 | 17,000 |
| 548635 | Jul 26, 2004 | Jul 26, 2004 | Pioneer Natural Res. USA, Inc. | Mansker Ranch GU #2H02533281 | 17,000 |
| 548635Amendment | Jul 26, 2004 | Jul 26, 2004 | Pioneer Natural Res. USA, Inc. | Mansker Ranch GU #202533281 | 17,000 |
| 548397 | Jul 19, 2004 | Jul 19, 2004 | Pioneer Natural Res. USA, Inc. | Schroeder Gas Unit #2H02533280 | 17,300 |
| 557724 | Jul 16, 2004 | Jul 16, 2004 | Gulfstar Properties, Inc. | Spindletop Gas Unit #102533148 | 10,000 |
| 548254 | Jul 15, 2004 | Jul 15, 2004 | Welder Exploration & Prod., Inc. | Peterson #102533279 | 4,600 |