| 475973Amendment | May 5, 1998 | May 5, 1998 | Edge Petroleum Oper. Co., Inc. | Garcia-Perez #1 | 5,500 | 13138256 |
| 475711 | Apr 29, 1998 | Apr 29, 1998 | Manti Operating Company | Kohler, V. -A- #198 | 6,300 | 13138253 |
| 475728 | Apr 28, 1998 | Apr 28, 1998 | Williams, Clayton Energy, Inc. | Driscoll Foundation #1Y | 12,500 | 13138254 |
| 475728Amendment | Apr 28, 1998 | Apr 28, 1998 | Williams, Clayton Energy, Inc. | Driscoll Foundation #1Y | 11,654 | 13138254 |
| 475725 | Apr 27, 1998 | Apr 27, 1998 | Edge Petroleum Oper. Co., Inc. | Dutson #1 | 5,800 | 13138252 |
| 475688 | Apr 27, 1998 | Apr 27, 1998 | Mobil Producing TX. & N.M. Inc. | Schoolfield #1 | 12,500 | 13138250 |
| 475687 | Apr 27, 1998 | Apr 27, 1998 | Mobil Producing TX. & N.M. Inc. | Mho #2 | 12,500 | 13138251 |
| 475629 | Apr 24, 1998 | Apr 24, 1998 | Edge Petroleum Oper. Co., Inc. | Southland #65 | 7,000 | 13138249 |
| 475629Amendment | Apr 24, 1998 | Apr 24, 1998 | Edge Petroleum Oper. Co., Inc. | Southland #65 | 10,250 | 13138249 |
| 475493 | Apr 24, 1998 | Apr 24, 1998 | Manti Operating Company | Kohler, V. -A- #187 | 2,474 | 13138107 |
| 475364 | Apr 21, 1998 | Apr 21, 1998 | Cotton, W.L. Gems & Minerals Ltd | Henderson-State #6A | 2,924 | 13110805 |
| 475365 | Apr 20, 1998 | Apr 20, 1998 | Cotton, W.L. Gems & Minerals Ltd | Henderson-State #1 | 3,260 | 13137299 |
| 475431 | Apr 17, 1998 | Apr 17, 1998 | Edge Petroleum Oper. Co., Inc. | Trevino #1 | 6,550 | 13138248 |
| 475298 | Apr 14, 1998 | Apr 14, 1998 | Edge Petroleum Oper. Co., Inc. | Huizar #1 | 9,600 | 13138247 |
| 475024 | Apr 3, 1998 | Apr 3, 1998 | Vastar Resources, Inc. | Akers #1 | 11,700 | 13138246 |
| 474903 | Apr 3, 1998 | Apr 3, 1998 | Miller, W. C. Operating Company | Duval County Ranch Co. #3 | 1,250 | 13138243 |
| 474902 | Apr 3, 1998 | Apr 3, 1998 | Miller, W. C. Operating Company | Duval County Ranch Co. #2 | 750 | 13138244 |
| 474901 | Apr 3, 1998 | Apr 3, 1998 | Miller, W. C. Operating Company | Duval County Ranch Co. #1 | 750 | 13138245 |
| 474580 | Mar 30, 1998 | Mar 30, 1998 | Southwestern Energy Prod. Co. | Duval County Ranch -K- #60 | 1,860 | 13137397 |
| 474580Amendment | Mar 30, 1998 | Mar 30, 1998 | Southwestern Energy Prod. Co. | Duval County Ranch -K- #60 | 1,860 | 13137397 |
| 474713 | Mar 25, 1998 | Mar 25, 1998 | Enron Oil & Gas Company | Frost National Bank 65 #1 | 11,000 | 13138242 |
| 474636 | Mar 23, 1998 | Mar 23, 1998 | Enron Oil & Gas Company | Lloyd, F. B. #6 | 12,273 | 13137957 |
| 474319 | Mar 20, 1998 | Mar 20, 1998 | Speed, F. Michael, Trustee | Duval Ranch Section 62 #32 | 1,400 | 13138241 |
| 474208 | Mar 12, 1998 | Mar 12, 1998 | Sonat Exploration Co. - Houston | Clark State #1 | 14,000 | 13138240 |
| 474014 | Mar 6, 1998 | Mar 6, 1998 | Inland Ocean, Inc. | Navejar-Pena Unit #1 | 5,950 | 13138239 |
| 473740 | Feb 24, 1998 | Feb 24, 1998 | Samedan Oil Corporation | Tinney #2 | 7,500 | 13138238 |
| 471768 | Feb 24, 1998 | Feb 24, 1998 | Southwestern Energy Prod. Co. | Duval County Ranch Co. -K- #66 | 5,680 | 13137967 |
| 473476 | Feb 23, 1998 | Feb 23, 1998 | Unit Petroleum Company | Sepulveda #1 | 9,700 | 13138235 |
| 473589 | Feb 20, 1998 | Feb 20, 1998 | Pioneer Natural Res. USA, Inc. | Frost National Bank #3 | 12,000 | 13138237 |
| 473564 | Feb 19, 1998 | Feb 19, 1998 | Shell Western E&P Inc. | Weatherby, L.C. East #1 | 17,900 | 13138236 |
| 473430 | Feb 17, 1998 | Feb 17, 1998 | Ultra Oil & Gas, Inc. | Ultra-Mobil Fee #5 | 15,000 | 13138234 |
| 473430Amendment | Feb 17, 1998 | Feb 17, 1998 | Ultra Oil & Gas, Inc. | Ultra-MF #5 | 15,500 | 13138234 |
| 473374 | Feb 17, 1998 | Feb 17, 1998 | South Texas Disposal, Inc. | South Texas Disposal, Inc. #2 | 3,600 | 13138233 |
| 473175 | Feb 12, 1998 | Feb 12, 1998 | Trium Energy, Inc. | Lopez A #24B | 1,850 | 13138232 |
| 472987 | Feb 5, 1998 | Feb 5, 1998 | Mobil Producing TX. & N.M. Inc. | Ruiz #1 | 15,500 | 13138231 |
| 472887 | Feb 5, 1998 | Feb 5, 1998 | Edge Petroleum Oper. Co., Inc. | Miller #6 | 6,100 | 13138185 |
| 472765 | Feb 2, 1998 | Feb 2, 1998 | Southwestern Energy Prod. Co. | Duval County Ranch Company #54 | 2,200 | 13137111 |
| 472731 | Feb 2, 1998 | Feb 2, 1998 | Hamilton, J. R. | Ortiz G.U. #1 | 8,280 | 13136788 |
| 472201 | Jan 29, 1998 | Jan 29, 1998 | Osyka Oil & Gas, Inc. | State/Clark Lease #1 | 2,850 | 13138230 |
| 472616 | Jan 28, 1998 | Jan 28, 1998 | Southwestern Energy Prod. Co. | Duval County Ranch -K- #58 | 2,200 | 13137309 |
| 472587 | Jan 23, 1998 | Jan 23, 1998 | Hilcorp Energy Company | Marshall-State #1 | 14,666 | 13135405 |
| 471769 | Jan 13, 1998 | Jan 13, 1998 | Southwestern Energy Prod. Co. | Duval County Ranch Co. -K- #40 | 5,520 | 13130771 |
| 472101 | Jan 12, 1998 | Jan 12, 1998 | Dreyfus, Louis Natural Gas Corp | Herbst-Torel #3 | 11,000 | 13134968 |
| 471726 | Dec 31, 1997 | Dec 31, 1997 | Killam Oil Co., Ltd. | D.C.R. 260-F State #14 | 2,000 | 13138228 |
| 471717 | Dec 31, 1997 | Dec 31, 1997 | Bronco Z Production | Elvis #1 | 3,000 | 13138229 |
| 471606 | Dec 23, 1997 | Dec 23, 1997 | Mobil Producing TX. & N.M. Inc. | MHQ #1 | 15,500 | 13138227 |
| 471219 | Dec 15, 1997 | Dec 15, 1997 | Paladin-Hayes, L.L.C. | Wernecke, E. D. -A #1 | 17,000 | 13138226 |
| 470863 | Dec 5, 1997 | Dec 5, 1997 | Cabot Oil & Gas Corporation | Self Gas Unit #1 | 11,300 | 13138225 |
| 470555 | Nov 25, 1997 | Nov 25, 1997 | Bay Rock Operating Company | Strasburger A #1 | 3,000 | 13138224 |
| 470301 | Nov 19, 1997 | Nov 19, 1997 | Texstar Petroleum, L.L.C. | Hamilton, Buck #1 | 13,600 | 13137750 |
| 470131 | Nov 18, 1997 | Nov 18, 1997 | Sideline Energy Inc. | Beach, Barbara Shaffer #1 | 9,000 | 13136469 |
| 470125 | Nov 14, 1997 | Nov 14, 1997 | Kebo Oil & Gas, Inc. | Garrett #1 | 4,900 | 13138223 |
| 470078 | Nov 13, 1997 | Nov 13, 1997 | Sanchez-O'Brien Oil & Gas Corp. | Cuellar 123 #1 | 4,500 | 13138222 |
| 470078Amendment | Nov 13, 1997 | Nov 13, 1997 | Sanchez-O'Brien Oil & Gas Corp. | Cuellar 123 #1 | 3,700 | 13138222 |
| 469277 | Nov 3, 1997 | Nov 3, 1997 | Dewbre Petroleum Corporation | Duval County Ranch Co State "L" #45 | 1,500 | 13138221 |
| 469240 | Nov 3, 1997 | Nov 3, 1997 | Morsey Oil & Gas Corp. | Hubberd, Mary C. #35R | 2,750 | 13138220 |
| 469213 | Oct 24, 1997 | Oct 24, 1997 | Killam Oil Co., Ltd. | DCR-State Sec. 260N #5 | 2,000 | 13138219 |
| 469120 | Oct 22, 1997 | Oct 22, 1997 | Vastar Resources, Inc. | Humble Fee Gas Unit #7 | 13,500 | 13136651 |
| 469120Amendment | Oct 22, 1997 | Oct 22, 1997 | Vastar Resources, Inc. | Humble Fee Gas Unit #7 | 13,500 | 13136651 |
| 468702 | Oct 10, 1997 | Oct 10, 1997 | Exxon Corp. | Dcrc Section 54 #2 | 2,384 | 13137740 |
| 468619 | Oct 9, 1997 | Oct 9, 1997 | Magnum Producing & Operating Co. | Denman, Leroy 'A' #3 | 4,288 | 13109458 |
| 468619Amendment | Oct 9, 1997 | Oct 9, 1997 | Live Oak Reserves, Inc. | Denman, Leroy "A" #3 | 4,350 | 13109458 |
| 468185 | Sep 30, 1997 | Sep 30, 1997 | Brigham Oil & Gas, L.P. | Welder Heirs #1 | 13,200 | 13138218 |
| 468185Amendment | Sep 30, 1997 | Sep 30, 1997 | Brigham Oil & Gas, L.P. | Welder State 212 #1 | 13,200 | 13138218 |
| 467837 | Sep 25, 1997 | Sep 25, 1997 | Killam Oil Co., Ltd. | Killam D. C. R. Sec. "196" #1 | 6,000 | 13138216 |
| 468009 | Sep 24, 1997 | Sep 24, 1997 | Ultra Oil & Gas, Inc. | Ultra - Mobil Fee #4 | 14,200 | 13138217 |
| 467680 | Sep 24, 1997 | Sep 24, 1997 | Inland Ocean, Inc. | Mendietta, E. M. #1 | 6,100 | 13138214 |
| 467757 | Sep 18, 1997 | Sep 18, 1997 | Ricks Exploration, Inc. | Boyd G. U. #1 | 7,500 | 13138215 |
| 467380 | Sep 10, 1997 | Sep 10, 1997 | Cimarron Engineering Corp. | Salinas #1 | 4,100 | 13138213 |
| 466757 | Aug 26, 1997 | Aug 26, 1997 | Coastal Oil & Gas Corporation | Longoria Mineral Trust, et Al #1 | 13,500 | 13138211 |
| 466757Amendment | Aug 26, 1997 | Aug 26, 1997 | Coastal Oil & Gas Corporation | Longoria Mineral Trust, et Al #1 | 13,500 | 13138211 |
| 466757Amendment | Aug 26, 1997 | Aug 26, 1997 | Coastal Oil & Gas Corporation | Longoria Mineral Trust, et Al #1 | 13,500 | 13138211 |
| 466668 | Aug 25, 1997 | Aug 25, 1997 | Vastar Resources, Inc. | Ragsdale #1 | 12,200 | 13138210 |
| 466497 | Aug 20, 1997 | Aug 20, 1997 | Killam Oil Co., Ltd. | Wilson, J. O. #1 | 6,500 | 13138209 |
| 466301 | Aug 15, 1997 | Aug 15, 1997 | Paladin-Hayes, L.L.C. | E.D. Wernecke G.U. #1 | 17,000 | 13138208 |
| 466059 | Aug 14, 1997 | Aug 14, 1997 | Manti Operating Company | Roos, H. #16 | 12,700 | 13138207 |
| 466081 | Aug 11, 1997 | Aug 11, 1997 | Exxon Corp. | D C R C-State Tendido GU#3 #2 | 2,958 | 13137985 |
| 466080 | Aug 11, 1997 | Aug 11, 1997 | Exxon Corp. | D C R C Tendido Gas Unit 1 #1 | 8,244 | 13137918 |
| 466080Amendment | Aug 11, 1997 | Aug 11, 1997 | Exxon Corp. | D C R C Tendido Gas Unit 1 #1 | 8,244 | 13137918 |
| 465996 | Aug 8, 1997 | Aug 8, 1997 | Ellsworth, H. P. O&G Properties | Davy #1 | 4,850 | 13138206 |
| 465996Amendment | Aug 8, 1997 | Aug 8, 1997 | Winn Exploration Co., Inc. | Davy #1 | 4,850 | 13138206 |
| 465400 | Aug 7, 1997 | Aug 7, 1997 | Samedan Oil Corporation | Vasquez, A. #1 | 7,600 | 13138203 |
| 465450 | Aug 5, 1997 | Aug 5, 1997 | Manti Operating Company | Kohler, V. 'A' #197 | 2,100 | 13138204 |
| 465439 | Aug 4, 1997 | Aug 4, 1997 | Manti Operating Company | Kohler, V. -A- #192 | 1,748 | 13138118 |
| 465451 | Jul 28, 1997 | Jul 28, 1997 | Manti Operating Company | Kohler, V. 'A' #196 | 6,500 | 13138205 |
| 465451Amendment | Jul 28, 1997 | Jul 28, 1997 | Manti Operating Company | Kohler, V. 'A' #196 | 3,662 | 13138205 |
| 465119 | Jul 23, 1997 | Jul 23, 1997 | Killam Oil Co., Ltd. | DCR State Sec. 80 #1 | 7,500 | 13138202 |
| 464144 | Jul 22, 1997 | Jul 22, 1997 | Dewbre Petroleum Corporation | Duval County Ranch Co State 'F' #8 | 1,434 | 13106328 |
| 465030 | Jul 21, 1997 | Jul 21, 1997 | Killam Oil Co., Ltd. | Killam Freer Ranch Sec. "50" #2 | 1,910 | 13138162 |
| 464961 | Jul 16, 1997 | Jul 16, 1997 | Mariner Energy, Inc. | Benavides, R. V. #1 | 16,500 | 13138201 |
| 463865 | Jul 15, 1997 | Jul 15, 1997 | Manti Operating Company | Roos, H. #15 | 10,630 | 13137406 |
| 463865Amendment | Jul 15, 1997 | Jul 15, 1997 | Manti Operating Company | Roos, H. #15 | 11,622 | 13137406 |
| 464067 | Jun 20, 1997 | Jun 20, 1997 | Alco Drlg. Co. | Hinojosa #1 | 7,600 | 13138388 |
| 463433 | Jun 6, 1997 | Jun 6, 1997 | Laroca Resources, Ltd | Garcia, Ralph #1 | 4,450 | 13138199 |
| 463148 | Jun 5, 1997 | Jun 5, 1997 | Inland Ocean, Inc. | Looney, C. R. et Al #1 | 6,100 | 13138196 |
| 463148Amendment | Jun 5, 1997 | Jun 5, 1997 | Hunter Petroleum Inc. | Looney, C. R. et Al #3 | 6,100 | 13138196 |
| 463255 | Jun 4, 1997 | Jun 4, 1997 | Killam Oil Co., Ltd. | DCR Sec. 295 SW #7 | 1,400 | 13138198 |
| 463254 | Jun 4, 1997 | Jun 4, 1997 | Killam Oil Co., Ltd. | DCR State Sec. 260N #4 | 2,000 | 13138197 |
| 462927 | May 30, 1997 | May 30, 1997 | Frank, Louis L. | Dougherty, James R. -L- #2 | 2,450 | 13138195 |
| 462926 | May 30, 1997 | May 30, 1997 | Frank, Louis L. | Dougherty, James R. -L- #1 | 2,450 | 13138194 |