| 520178Amendment | May 23, 2002 | May 23, 2002 | Wilson, Don H., Inc. | Gonzales #1 | 6,100 | 12733189 |
| 519282 | Apr 22, 2002 | Apr 22, 2002 | Rio Exploration Company | Shook Ranch #130 | 3,400 | 12733188 |
| 518358 | Apr 2, 2002 | Apr 2, 2002 | Berenergy Corporation | Rogers, H. L. #1214 | 4,962 | 12732883 |
| 519235 | Mar 28, 2002 | Mar 28, 2002 | Carrizo Exploration, Inc. | Tumlinson #1 | 5,000 | 12733171 |
| 517473 | Feb 11, 2002 | Feb 11, 2002 | Kerns O & G, Inc. | Stumberg, L.H. #1073 | 5,000 | 12733187 |
| 517473Amendment | Feb 11, 2002 | Feb 11, 2002 | Kerns O & G, Inc. | Stumberg, L.H. #1073 | 5,000 | 12733187 |
| 514633 | Nov 21, 2001 | Nov 21, 2001 | Epgt-Tex, L.P. | Rectifier BR-1 #1BR | 500 | 12733185 |
| 514632 | Nov 21, 2001 | Nov 21, 2001 | Epgt-Tex, L.P. | Rectifier DC-18 #18DC | 500 | 12733186 |
| 513762 | Sep 25, 2001 | Sep 25, 2001 | Hamilton, J. R. | Hamilton B #1A | 3,000 | 12733184 |
| 513881 | Sep 24, 2001 | Sep 24, 2001 | Merit Energy Company | South Pena Creek Unit #500 | 3,400 | 12733183 |
| 513880 | Sep 24, 2001 | Sep 24, 2001 | Merit Energy Company | South Pena Creek Unit #499 | 3,400 | 12733182 |
| 513879 | Sep 24, 2001 | Sep 24, 2001 | Merit Energy Company | South Pena Creek Unit #498 | 3,400 | 12733181 |
| 513654 | Sep 21, 2001 | Sep 21, 2001 | Exploration Company, The | Comanche #1024 | 2,670 | 12732169 |
| 513653 | Sep 21, 2001 | Sep 21, 2001 | Exploration Company, The | Comanche #1019 | 2,949 | 12732170 |
| 513257 | Aug 31, 2001 | Aug 31, 2001 | Sage Energy Company | Jasik, C. #3H | 6,900 | 12733032 |
| 513257Amendment | Aug 31, 2001 | Aug 31, 2001 | Sage Energy Company | Jasik, C. #3H | 6,600 | 12733032 |
| 512206 | Aug 8, 2001 | Aug 8, 2001 | Sage Energy Company | Jasik, C. #1H | 6,800 | 12732866 |
| 512206Amendment | Aug 8, 2001 | Aug 8, 2001 | Sage Energy Company | Jasik, C. #1H | 6,679 | 12732866 |
| 512176 | Aug 2, 2001 | Aug 2, 2001 | Merit Energy Company | Webb, Lake T. #3 | 3,275 | 12730543 |
| 510833 | Jun 28, 2001 | Jun 28, 2001 | Apache Corporation | Fitzsimmons #4705 | 4,300 | 12733180 |
| 510040 | Jun 8, 2001 | Jun 8, 2001 | Merit Energy Company | Webb #2 | 3,280 | 12730524 |
| 508625 | May 10, 2001 | May 10, 2001 | Rio Exploration Company | Shook #3 | 3,250 | 12733179 |
| 508625Amendment | May 10, 2001 | May 10, 2001 | Rio Exploration Company | Shook #3 | 3,600 | 12733179 |
| 506457Amendment | Apr 27, 2001 | Apr 27, 2001 | Merit Energy Company | South Pena Creek Unit #497 | 3,400 | 12733178 |
| 506457Amendment | Apr 27, 2001 | Apr 27, 2001 | Txco Resources Inc. | South Pena Creek Unit #497 | 3,400 | 12733178 |
| 506457 | Mar 13, 2001 | Mar 13, 2001 | Merit Energy Company | South Pena Creek Unit #497 | 3,300 | 12733178 |
| 506456 | Mar 13, 2001 | Mar 13, 2001 | Merit Energy Company | South Pena Creek Unit #495 | 3,300 | 12733177 |
| 506455 | Mar 13, 2001 | Mar 13, 2001 | Merit Energy Company | South Pena Creek Unit #496 | 3,300 | 12733176 |
| 504920 | Feb 5, 2001 | Feb 5, 2001 | Apache Corporation | Fitsimons #2502 | 4,100 | 12733175 |
| 504347 | Feb 1, 2001 | Feb 1, 2001 | Double J Operating Company, Inc. | Baty-Heitz Unit #1H | 6,580 | 12733023 |
| 504347Amendment | Feb 1, 2001 | Feb 1, 2001 | Double J Operating Company, Inc. | Baty #1 | 9,000 | 12733023 |
| 504380 | Jan 29, 2001 | Jan 29, 2001 | Double J Operating Company, Inc. | Brooks M. Heitz -a- Unit #1H | 6,230 | 12732976 |
| 504380Amendment | Jan 29, 2001 | Jan 29, 2001 | Double J Operating Company, Inc. | Heitz, Brooks M. #1 | 9,000 | 12732976 |
| 504001 | Jan 12, 2001 | Jan 12, 2001 | Premier Minerals, Inc | Larry #1B | 5,000 | 12733174 |
| 503372 | Dec 28, 2000 | Dec 28, 2000 | Rio Exploration Company | Shook #2 | 3,250 | 12733173 |
| 503175 | Dec 18, 2000 | Dec 18, 2000 | Premier Minerals, Inc | Larry #1R | 5,000 | 12733172 |
| 498789 | Oct 4, 2000 | Oct 4, 2000 | Quatro Oil and Gas, Inc. | Byerly, Radford #1A | 6,475 | 12732857 |
| 498781 | Aug 28, 2000 | Aug 28, 2000 | Premier Minerals, Inc | Tom #1 | 5,000 | 12733171 |
| 498780 | Aug 24, 2000 | Aug 24, 2000 | Premier Minerals, Inc | Larry #1 | 5,000 | 12733170 |
| 494724 | May 12, 2000 | May 12, 2000 | Brshog, Inc. | Strait #1 | 7,500 | 12731662 |
| 491278 | Jan 25, 2000 | Jan 25, 2000 | Collins & Ware, Inc. | Fitzsimons "A" #6216 | 4,100 | 12733169 |
| 491278Amendment | Jan 25, 2000 | Jan 25, 2000 | Collins & Ware, Inc. | Fitzsimons "A" #6216 | 4,100 | 12733169 |
| 487818 | Oct 14, 1999 | Oct 14, 1999 | Tidelands Gas Corporation | Halsell, Ewing #3662 | 2,050 | 12700005 |
| 487743 | Sep 20, 1999 | Sep 20, 1999 | Hunter Petroleum Inc. | Williams #1H | 6,700 | 12732874 |
| 487743Amendment | Sep 20, 1999 | Sep 20, 1999 | Hunter Petroleum Inc. | Williams #1H | 6,700 | 12732874 |
| 486575 | Aug 13, 1999 | Aug 13, 1999 | Double J Operating Company, Inc. | Frost National Bank #691H | 6,619 | 12733056 |
| 486535 | Aug 11, 1999 | Aug 11, 1999 | Larron Energy Corporation | Bustamante #1 | 4,800 | 12733168 |
| 486071 | Jul 23, 1999 | Jul 23, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #6313 | 4,100 | 12733167 |
| 485816 | Jul 13, 1999 | Jul 13, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #4807 | 4,100 | 12733165 |
| 485605 | Jul 13, 1999 | Jul 13, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #4816 | 4,100 | 12733166 |
| 485778 | Jul 12, 1999 | Jul 12, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #3707 | 4,100 | 12733164 |
| 485375 | Jun 22, 1999 | Jun 22, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #3612 | 4,100 | 12733163 |
| 485374 | Jun 22, 1999 | Jun 22, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #3606 | 4,100 | 12733162 |
| 484210 | Apr 29, 1999 | Apr 29, 1999 | WCS Oil and Gas Corporation | Miller-Drinkard #1REH | 9,000 | 12732858 |
| 481248 | Feb 26, 1999 | Feb 26, 1999 | Overholt Oil and Gas | Groce, J. G. #4 | 1,700 | 12730431 |
| 482601 | Feb 9, 1999 | Feb 9, 1999 | Collins & Ware, Inc. | Fitzsimons "A" #1714 | 3,579 | 12733151 |
| 482600 | Feb 9, 1999 | Feb 9, 1999 | Collins & Ware, Inc. | Fitzsimmons "A" #251 | 3,785 | 12733153 |
| 481858 | Jan 5, 1999 | Jan 5, 1999 | U. S. Operating, Inc. | Briscoe #1083 | 6,000 | 12733161 |
| 481492 | Dec 28, 1998 | Dec 28, 1998 | Overholt Oil and Gas | Groce, J. G. #2 | 1,700 | 12730423 |
| 481447 | Dec 11, 1998 | Dec 11, 1998 | Hunter Petroleum Inc. | Williams #1H | 6,700 | 12732874 |
| 481447Amendment | Dec 11, 1998 | Dec 11, 1998 | Hunter Petroleum Inc. | Williams #1H | 6,700 | 12732874 |
| 477277 | Aug 5, 1998 | Aug 5, 1998 | Prime Operating Company | San Pedro Ranch #9026 | 3,840 | 12733006 |
| 478375 | Aug 3, 1998 | Aug 3, 1998 | Cavalier Oil & Gas, Inc. | McKnight, E. #9 | 2,800 | 12700205 |
| 477906 | Jul 21, 1998 | Jul 21, 1998 | U. S. Operating, Inc. | Beinhorn #1073 | 5,400 | 12733160 |
| 477908 | Jul 17, 1998 | Jul 17, 1998 | U. S. Operating, Inc. | Briscoe #1088 | 5,400 | 12733159 |
| 474534 | May 15, 1998 | May 15, 1998 | Cavalier Oil & Gas, Inc. | McKnight "B" #3 | 3,100 | 12700496 |
| 475721 | May 1, 1998 | May 1, 1998 | First Rock, Inc. | El Cid "B" #7H | 9,000 | 12732995 |
| 475471 | Apr 24, 1998 | Apr 24, 1998 | U. S. Operating, Inc. | Briscoe/Hulsman #1682 | 6,500 | 12733158 |
| 475276 | Apr 21, 1998 | Apr 21, 1998 | Cavalier Oil & Gas, Inc. | McKnight Unit "A" #17 | 1,900 | 12733157 |
| 475276Amendment | Apr 21, 1998 | Apr 21, 1998 | Cavalier Oil & Gas, Inc. | McKnight Unit #17 | 2,600 | 12733157 |
| 475275 | Apr 21, 1998 | Apr 21, 1998 | Cavalier Oil & Gas, Inc. | McKnight Unit "B" #18 | 1,900 | 12733156 |
| 475275Amendment | Apr 21, 1998 | Apr 21, 1998 | Cavalier Oil & Gas, Inc. | McKnight Unit "B" #18 | 3,000 | 12733156 |
| 474539 | Mar 24, 1998 | Mar 24, 1998 | Carrizo Exploration, Inc. | Gardner, E. O. #1 | 4,600 | 12731711 |
| 474538 | Mar 24, 1998 | Mar 24, 1998 | Carrizo Exploration, Inc. | Midway #1 | 6,100 | 12733124 |
| 474086 | Mar 9, 1998 | Mar 9, 1998 | Kerns O & G, Inc. | Tumlinson, Bert #6 | 4,800 | 12732297 |
| 473290 | Mar 5, 1998 | Mar 5, 1998 | Kerns O & G, Inc. | Briscoe Ranch #34 | 5,200 | 12733155 |
| 473800 | Feb 25, 1998 | Feb 25, 1998 | Omni Operating Company(a) | Lupe, John B. C #7 | 7,503 | 12731621 |
| 473799 | Feb 25, 1998 | Feb 25, 1998 | Omni Operating Company(a) | Lupe, John B. C #8 | 7,380 | 12731700 |
| 471850 | Feb 25, 1998 | Feb 25, 1998 | Tidelands Gas Corporation | Halsell, Ewing #1662L | 1,750 | 12700003 |
| 473404 | Feb 17, 1998 | Feb 17, 1998 | Union Pacific Resources Company | Fitzsimons "A' #1714 | 4,000 | 12733151 |
| 473403 | Feb 17, 1998 | Feb 17, 1998 | Union Pacific Resources Company | Fitzsimons "A" #2416 | 4,000 | 12733152 |
| 473400 | Feb 17, 1998 | Feb 17, 1998 | Union Pacific Resources Company | Fitzsimons "A" #2501 | 4,000 | 12733153 |
| 473397 | Feb 17, 1998 | Feb 17, 1998 | Union Pacific Resources Company | Fitzsimons "A' #1713 | 4,000 | 12733154 |
| 472386 | Jan 30, 1998 | Jan 30, 1998 | Cavalier Oil & Gas, Inc. | McKnight #1 | 2,600 | 12730902 |
| 472755 | Jan 29, 1998 | Jan 29, 1998 | Union Pacific Resources Company | Fitzsimmons "A" #5701 | 4,000 | 12733149 |
| 472754 | Jan 29, 1998 | Jan 29, 1998 | Union Pacific Resources Company | Fitzsimmons "A" #4205 | 4,000 | 12733148 |
| 472753 | Jan 29, 1998 | Jan 29, 1998 | Union Pacific Resources Company | Fitzsimmons "A" #5706 | 4,000 | 12733150 |
| 472753Amendment | Jan 29, 1998 | Jan 29, 1998 | Union Pacific Resources Company | Fitzsimmons "A" #5706 | 4,000 | 12733150 |
| 472698 | Jan 27, 1998 | Jan 27, 1998 | Union Pacific Resources Company | Fitzsimmons "A" #6113R | 4,000 | 12733147 |
| 472697 | Jan 27, 1998 | Jan 27, 1998 | Union Pacific Resources Company | Fitzsimons, Hugh A. et Al #4616 | 4,000 | 12733146 |
| 472696 | Jan 27, 1998 | Jan 27, 1998 | Union Pacific Resources Company | Fitzsimons, Hugh A. et Al #4615 | 4,000 | 12733145 |
| 472693 | Jan 27, 1998 | Jan 27, 1998 | Union Pacific Resources Company | Fitzsimons, Hugh A. et Al #4505 | 4,000 | 12733144 |
| 471793 | Jan 6, 1998 | Jan 6, 1998 | U. S. Operating, Inc. | Briscoe/Hulsman #1705 | 6,000 | 12733143 |
| 471793Amendment | Jan 6, 1998 | Jan 6, 1998 | U. S. Operating, Inc. | Briscoe/Hulsman #1705 | 5,780 | 12733143 |
| 471313 | Dec 16, 1997 | Dec 16, 1997 | Sage Energy Company | Nance Unit #3HH | 6,800 | 12733142 |
| 471313Amendment | Dec 16, 1997 | Dec 16, 1997 | Sage Energy Company | Nance Unit #3HH | 6,800 | 12733142 |
| 471299 | Dec 16, 1997 | Dec 16, 1997 | Klutts, Carlos J. | Burch Exploration Groce #1 | 2,550 | 12733141 |
| 470461 | Dec 9, 1997 | Dec 9, 1997 | Bronco Z Production | Suzanne #2 | 4,000 | 12733140 |
| 469743 | Nov 10, 1997 | Nov 10, 1997 | U. S. Operating, Inc. | Briscoe/Hulsman #1706B | 6,700 | 12733139 |
| 469489 | Oct 30, 1997 | Oct 30, 1997 | Sage Energy Company | Willerson Unit #1HH | 6,700 | 12733138 |