| 388530 | May 31, 1991 | May 31, 1991 | Sanchez-O'Brien Oil & Gas Corp. | Hereford, L. M. #43 | 9,300 | 47935248 |
| 388509 | May 31, 1991 | May 31, 1991 | Enron Oil & Gas Company | Roscher-Hirsch Gas Unit #2 | 9,400 | 47935247 |
| 387837 | May 30, 1991 | May 30, 1991 | Herschap Bros. | Wheatley #1A | 10,000 | 47935232 |
| 388399 | May 29, 1991 | May 29, 1991 | Enron Oil & Gas Company | Vaquillas Ranch 1646 #8 | 10,490 | 47935246 |
| 388294 | May 29, 1991 | May 29, 1991 | Pogo Producing Co. | Los Ojuelos Mineral Trust #1 | 10,000 | 47935245 |
| 388050 | May 28, 1991 | May 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #47 | 8,700 | 47935239 |
| 388050Amendment | May 28, 1991 | May 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #47 | 12,000 | 47935239 |
| 388310 | May 24, 1991 | May 24, 1991 | Michael Petr. & Hurd Ent., Ltd. | Briscoe "A" #1 | 9,500 | 47935244 |
| 388191 | May 23, 1991 | May 23, 1991 | Enron Oil & Gas Company | Bruni Mineral A #14 | 11,300 | 47935242 |
| 388191Amendment | May 23, 1991 | May 23, 1991 | Enron Oil & Gas Company | Bruni Mineral A #14 | 11,300 | 47935242 |
| 388209 | May 22, 1991 | May 22, 1991 | Transamerican Natural Gas Corp. | Carr "B" #1 | 9,400 | 47935241 |
| 388006 | May 21, 1991 | May 21, 1991 | Lewis Petro Properties, Inc. | Long, Archie #307 | 7,400 | 47935236 |
| 388004 | May 21, 1991 | May 21, 1991 | Lewis Petro Properties, Inc. | Garner, J.N. #9 | 7,150 | 47935237 |
| 387904 | May 21, 1991 | May 21, 1991 | Conoco Inc. | Vaquillas Ranch Co. Sgu #10 | 11,000 | 47935235 |
| 388140 | May 20, 1991 | May 20, 1991 | Enron Oil & Gas Company | Hirsch Estate 517 #5 | 9,700 | 47935240 |
| 388092 | May 20, 1991 | May 20, 1991 | Enron Oil & Gas Company | Vaquillas Ranch 1646 #7 | 10,500 | 47935238 |
| 387911 | May 15, 1991 | May 15, 1991 | Transamerican Natural Gas Corp. | B.M.T. #31 | 11,000 | 47935233 |
| 387908 | May 15, 1991 | May 15, 1991 | Transamerican Natural Gas Corp. | Martinez, D. #8 | 8,700 | 47935234 |
| 387761 | May 15, 1991 | May 15, 1991 | Null, W. M.-Oil Producer | Booth, W. V. Jr. #1B | 10,000 | 47935231 |
| 387777 | May 10, 1991 | May 10, 1991 | Enron Oil & Gas Company | Hein-Zimmerman Gas Unit #1 | 6,900 | 47934856 |
| 387516 | May 8, 1991 | May 8, 1991 | Mobil Producing TX. & N.M. Inc. | G. B. G. L and C. Co., Ltd. #1 | 9,000 | 47935230 |
| 386613 | May 8, 1991 | May 8, 1991 | Four Star Oil and Gas Company | Vaquillas Ranch #7 | 11,000 | 47935214 |
| 387011 | May 6, 1991 | May 6, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #46 | 9,000 | 47935220 |
| 387307 | May 3, 1991 | May 3, 1991 | Hunter & Hada | Barreda #1B | 6,800 | 47935226 |
| 387307Amendment | May 3, 1991 | May 3, 1991 | Hunter & Hada | Barreda #1B | 6,800 | 47935226 |
| 387363 | May 1, 1991 | May 1, 1991 | Enron Oil & Gas Company | Bruni Mineral C #11 | 11,650 | 47935228 |
| 387362 | May 1, 1991 | May 1, 1991 | Enron Oil & Gas Company | Hirsch Estate 2071 #2 | 9,500 | 47935229 |
| 387355 | May 1, 1991 | May 1, 1991 | Conoco Inc. | Vaquillas Ranch Co. Sgu #9 | 11,000 | 47935227 |
| 387331 | Apr 30, 1991 | Apr 30, 1991 | Brayton Oil Corp. | Vaquillas Ranch #1 | 2,000 | 47935224 |
| 387330 | Apr 30, 1991 | Apr 30, 1991 | Brayton Oil Corp. | Vaquillas Ranch #2 | 2,000 | 47935225 |
| 387250 | Apr 30, 1991 | Apr 30, 1991 | Transamerican Natural Gas Corp. | Bruni Ranch #25 | 9,700 | 47935223 |
| 387225 | Apr 26, 1991 | Apr 26, 1991 | Enron Oil & Gas Company | Vaquillas Ranch 1646 #6 | 10,700 | 47935222 |
| 387161 | Apr 26, 1991 | Apr 26, 1991 | Taos Oil Corporation | Benavides, R. V. #1 | 7,000 | 47935100 |
| 387044 | Apr 24, 1991 | Apr 24, 1991 | Conoco Inc. | Vaquillas Ranch G #78 | 13,200 | 47935221 |
| 386938 | Apr 23, 1991 | Apr 23, 1991 | Kerns O & G, Inc. | Petty, O.S. #807 | 6,000 | 47932923 |
| 386938Amendment | Apr 23, 1991 | Apr 23, 1991 | Kerns O & G, Inc. | Petty, O.S. #807 | 6,000 | 47932923 |
| 386293 | Apr 23, 1991 | Apr 23, 1991 | Pinon Corporation | Briscoe 1045 #3 | 6,000 | 47932134 |
| 386923 | Apr 22, 1991 | Apr 22, 1991 | Pogo Producing Co. | Gomez, Juan Jose #1 | 9,200 | 47935218 |
| 386953 | Apr 18, 1991 | Apr 18, 1991 | Lobo Resources, Ltd. | Callaghan Ranch, Ltd. - State #2 | 8,000 | 47935219 |
| 386893 | Apr 18, 1991 | Apr 18, 1991 | Transamerican Natural Gas Corp. | Frost National Bank #41 | 8,500 | 47935217 |
| 386877 | Apr 17, 1991 | Apr 17, 1991 | Marathon Oil Company | Marathon/Killam/Frost Natl Bank #1 | 16,500 | 47935216 |
| 386877Amendment | Apr 17, 1991 | Apr 17, 1991 | Marathon Oil Company | Marathon/Killam/Frost Natl Bank #1 | 17,000 | 47935216 |
| 386811 | Apr 15, 1991 | Apr 15, 1991 | Michael Petroleum Corporation | Alexander, M.M. #1 | 8,000 | 47935215 |
| 386574 | Apr 9, 1991 | Apr 9, 1991 | Enron Oil & Gas Company | Culpepper #2 | 9,500 | 47935213 |
| 386562 | Apr 9, 1991 | Apr 9, 1991 | Mobil Producing TX. & N.M. Inc. | Callaghan Ranch #19 | 6,650 | 47930811 |
| 386441 | Apr 9, 1991 | Apr 9, 1991 | Enron Oil & Gas Company | Hirsch Estate 1770 B #1 | 9,350 | 47935212 |
| 386398 | Apr 9, 1991 | Apr 9, 1991 | Conoco Inc. | Vaquillas Ranch Co. Ltd. #39 | 10,100 | 47935211 |
| 386323 | Apr 5, 1991 | Apr 5, 1991 | Mobil Producing TX. & N.M. Inc. | Callaghan Ranch #26 | 6,640 | 47930915 |
| 386339 | Apr 4, 1991 | Apr 4, 1991 | Enron Oil & Gas Company | Bruni Mineral B #14 | 11,500 | 47935210 |
| 386339Amendment | Apr 4, 1991 | Apr 4, 1991 | Enron Oil & Gas Company | Bruni Mineral B #14 | 11,500 | 47935210 |
| 386095 | Apr 3, 1991 | Apr 3, 1991 | Conoco Inc. | Vaquillas Ranch A1 #85 | 11,100 | 47935206 |
| 386062 | Apr 3, 1991 | Apr 3, 1991 | Conoco Inc. | Vaquillas Ranch A8 #86 | 10,200 | 47935205 |
| 386230 | Apr 2, 1991 | Apr 2, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #9 | 8,875 | 47934215 |
| 386063 | Apr 1, 1991 | Apr 1, 1991 | Conoco Inc. | Benavides, Rosa V. D #41 | 9,200 | 47935209 |
| 386214 | Mar 28, 1991 | Mar 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #43 | 11,000 | 47935208 |
| 386214Amendment | Mar 28, 1991 | Mar 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #43 | 12,000 | 47935208 |
| 386214Amendment | Mar 28, 1991 | Mar 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #43 | 12,000 | 47935208 |
| 386150 | Mar 27, 1991 | Mar 27, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #44 | 9,900 | 47935207 |
| 386150Amendment | Mar 27, 1991 | Mar 27, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #44 | 9,900 | 47935207 |
| 397800 | Mar 26, 1991 | Mar 26, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #65 | 7,150 | 47935434 |
| 397800Amendment | Mar 26, 1991 | Mar 26, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #65 | 7,700 | 47935434 |
| 386019 | Mar 26, 1991 | Mar 26, 1991 | Enron Oil & Gas Company | Vaquillas Ranch 1631 #4 | 10,350 | 47935202 |
| 386018 | Mar 26, 1991 | Mar 26, 1991 | Enron Oil & Gas Company | Hirsch Estate 517 #4 | 9,300 | 47935203 |
| 386017 | Mar 26, 1991 | Mar 26, 1991 | Conoco Inc. | Benavides, Rosa V. - E #40 | 10,000 | 47935201 |
| 382832 | Mar 22, 1991 | Mar 22, 1991 | Hawk Exploration and Production | Billings, Floyd #1 | 2,500 | 47935204 |
| 385808 | Mar 20, 1991 | Mar 20, 1991 | Mobil Producing TX. & N.M. Inc. | Stanford, P. H. #5 | 10,100 | 47935200 |
| 385541 | Mar 19, 1991 | Mar 19, 1991 | Enron Oil & Gas Company | Bruni Mineral C #9 | 12,000 | 47935197 |
| 385540 | Mar 19, 1991 | Mar 19, 1991 | Enron Oil & Gas Company | Bruni Mineral B #13 | 11,600 | 47935196 |
| 384438 | Mar 19, 1991 | Mar 19, 1991 | Cometra Oil and Gas, Inc. | Leal #4 | 5,800 | 47935174 |
| 384437 | Mar 19, 1991 | Mar 19, 1991 | Cometra Oil and Gas, Inc. | Leal #3 | 5,800 | 47935173 |
| 384436 | Mar 19, 1991 | Mar 19, 1991 | Cometra Oil and Gas, Inc. | Leal #1A | 5,800 | 47935172 |
| 384436Amendment | Mar 19, 1991 | Mar 19, 1991 | Cometra Oil and Gas, Inc. | Leal #1A | 5,800 | 47935172 |
| 381266 | Mar 19, 1991 | Mar 19, 1991 | Kerns O & G, Inc. | Gates Ranch B #4035 | 5,950 | 47933417 |
| 385857 | Mar 18, 1991 | Mar 18, 1991 | Michael Petr. & Hurd Ent., Ltd. | El Gato - State #1 | 9,500 | 47935199 |
| 385658 | Mar 18, 1991 | Mar 18, 1991 | Transamerican Natural Gas Corp. | Marrs-McLean #2 | 12,300 | 47935198 |
| 385553 | Mar 11, 1991 | Mar 11, 1991 | Hunter & Hada | Saunders, J. R. #1 | 6,700 | 47935195 |
| 385419 | Mar 7, 1991 | Mar 7, 1991 | Enron Oil & Gas Company | Bruni Mineral C #10 | 11,000 | 47935194 |
| 385285 | Mar 7, 1991 | Mar 7, 1991 | Conoco Inc. | Vaquillas Ranch C #84 | 13,100 | 47935192 |
| 385284 | Mar 7, 1991 | Mar 7, 1991 | Conoco Inc. | Vaquillas Ranch A-6 #83 | 12,800 | 47935191 |
| 385283 | Mar 7, 1991 | Mar 7, 1991 | Conoco Inc. | Vaquillas Ranch E #82 | 12,200 | 47935190 |
| 385339 | Mar 5, 1991 | Mar 5, 1991 | Enron Oil & Gas Company | Vaquillas Ranch 1646 B #5 | 10,400 | 47935193 |
| 385182 | Mar 4, 1991 | Mar 4, 1991 | Bahia Oil & Gas, Inc. | Adami, Robert #1 | 1,100 | 47935189 |
| 384978 | Feb 28, 1991 | Feb 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #41 | 9,150 | 47935185 |
| 384978Amendment | Feb 28, 1991 | Feb 28, 1991 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #41 | 9,150 | 47935185 |
| 385169 | Feb 27, 1991 | Feb 27, 1991 | Enron Oil & Gas Company | Hirsh Estate 538 #4 | 9,300 | 47935188 |
| 385168 | Feb 27, 1991 | Feb 27, 1991 | Enron Oil & Gas Company | Hirsh-State 2072 #2 | 9,400 | 47935187 |
| 385149 | Feb 27, 1991 | Feb 27, 1991 | Transamerican Natural Gas Corp. | Lundell #50 | 10,200 | 47935186 |
| 384941 | Feb 26, 1991 | Feb 26, 1991 | Weaver & Sharp | Biel, E. (Emil) #14 | 1,100 | 47935183 |
| 384977 | Feb 22, 1991 | Feb 22, 1991 | Mobil Producing TX. & N.M. Inc. | Callaghan Ranch, South #16 | 9,000 | 47934589 |
| 384976 | Feb 22, 1991 | Feb 22, 1991 | Mobil Producing TX. & N.M. Inc. | Callaghan Ranch, South #42 | 9,300 | 47935184 |
| 384871 | Feb 22, 1991 | Feb 22, 1991 | Texas, L. Petroleum, Inc. | Ruben Gonzalez Gas Unit #4 | 15,000 | 47934517 |
| 384678 | Feb 21, 1991 | Feb 21, 1991 | Reh Energy, Inc. | Vaquillas Ranch Co., Ltd. #4 | 2,000 | 47935180 |
| 384919 | Feb 20, 1991 | Feb 20, 1991 | Michael Petroleum Corporation | Martin, S. J. "B" #5 | 10,000 | 47935182 |
| 384905 | Feb 20, 1991 | Feb 20, 1991 | Transamerican Natural Gas Corp. | Carr #52 | 10,400 | 47935181 |
| 384903 | Feb 20, 1991 | Feb 20, 1991 | Mobil Producing TX. & N.M. Inc. | Stanford, P. H. #3 | 9,500 | 47934502 |
| 384496 | Feb 20, 1991 | Feb 20, 1991 | Conoco Inc. | Vaquillas Ranch A10 #81 | 13,100 | 47935177 |
| 384650 | Feb 19, 1991 | Feb 19, 1991 | Pinon Corporation | Briscoe 1040 #4 | 5,475 | 47932137 |
| 383177 | Feb 19, 1991 | Feb 19, 1991 | American Exploration Company | So. Lopez Unit #2303 | 2,100 | 47935110 |
| 384524 | Feb 15, 1991 | Feb 15, 1991 | U. S. Operating, Inc. | Gates Ranch "A" #2031 | 5,560 | 47932088 |
| 384493 | Feb 15, 1991 | Feb 15, 1991 | Conoco Inc. | Vaquillas Ranch A #80 | 12,800 | 47935176 |