| 373486 | May 31, 1990 | May 31, 1990 | Lewis Petro Properties, Inc. | Olmitos Ranch, Inc. #4 | 7,524 | 47932953 |
| 373486Amendment | May 31, 1990 | May 31, 1990 | Lewis Petro Properties, Inc. | Olmitos Ranch, Inc. #4 | 7,524 | 47932953 |
| 373853 | May 25, 1990 | May 25, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Hubberd Estate "C" #1 | 10,400 | 47935040 |
| 373719 | May 25, 1990 | May 25, 1990 | Tri-C Resources, Inc. | Leal #1 | 6,000 | 47935039 |
| 371532 | May 22, 1990 | May 22, 1990 | Lewis Petro Properties, Inc. | Garner Ranch #1 | 7,100 | 47934794 |
| 373661 | May 21, 1990 | May 21, 1990 | Petroleum Management, Inc. | Luna-Adami #1 | 6,100 | 47935038 |
| 373541 | May 18, 1990 | May 18, 1990 | Transamerican Natural Gas Corp. | Frost National Bank #38 | 8,500 | 47935037 |
| 373105 | May 18, 1990 | May 18, 1990 | Landress, Roger D. | Gates Ranch #4996AH | 8,050 | 47935035 |
| 373105Amendment | May 18, 1990 | May 18, 1990 | Landress, Roger D. | Gates Ranch #4996AH | 8,050 | 47935035 |
| 373105Amendment | May 18, 1990 | May 18, 1990 | Landress, Roger D. | Gates Ranch #4996AH | 8,300 | 47935035 |
| 373438 | May 16, 1990 | May 16, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Martin, S.J. GU #3A | 10,040 | 47932524 |
| 373153 | May 14, 1990 | May 14, 1990 | Transamerican Natural Gas Corp. | B.M.T. #29 | 11,200 | 47935036 |
| 373081 | May 9, 1990 | May 9, 1990 | Columbus Energy Corp. | Martinez, D. S. #2 | 8,500 | 47935034 |
| 372977 | May 8, 1990 | May 8, 1990 | Enron Oil & Gas Company | Hubberd Estate #3 | 10,185 | 47935032 |
| 373020 | May 7, 1990 | May 7, 1990 | Transamerican Natural Gas Corp. | Bruni Ranch #23 | 9,400 | 47935033 |
| 372808 | Apr 30, 1990 | Apr 30, 1990 | Enron Oil & Gas Company | Hubberd Estate #2 | 10,250 | 47935031 |
| 372554 | Apr 27, 1990 | Apr 27, 1990 | Forest Oil Corp. | Bonebrake #6 | 11,000 | 47935030 |
| 372325 | Apr 20, 1990 | Apr 20, 1990 | Conoco Inc. | Saldivar, R. T. #11 | 11,900 | 47935028 |
| 372324 | Apr 19, 1990 | Apr 19, 1990 | Conoco Inc. | Vaquillas Ranch A1 #71 | 11,300 | 47935029 |
| 372050 | Apr 19, 1990 | Apr 19, 1990 | Hydrocarbon Horizons, Inc. | Lincoln, W. P. 2345 #1 | 6,250 | 47933632 |
| 372188 | Apr 18, 1990 | Apr 18, 1990 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #20 | 8,000 | 47935027 |
| 372163 | Apr 17, 1990 | Apr 17, 1990 | Columbus Energy Corp. | COG Malakoff-Peterson A #3 | 7,000 | 47935026 |
| 372163Amendment | Apr 17, 1990 | Apr 17, 1990 | Columbus Energy Corp. | COG Malakoff-Peterson A #3 | 7,000 | 47935026 |
| 372163Amendment | Apr 17, 1990 | Apr 17, 1990 | Columbus Energy Corp. | COG Malakoff-Peterson "A" #3 | 6,865 | 47935026 |
| 372166 | Apr 13, 1990 | Apr 13, 1990 | Enron Oil & Gas Company | Hubberd Estate #1 | 10,100 | 47935025 |
| 372166Amendment | Apr 13, 1990 | Apr 13, 1990 | Enron Oil & Gas Company | Hubberd Estate #1 | 10,100 | 47935025 |
| 372141 | Apr 12, 1990 | Apr 12, 1990 | Michael Petroleum Corporation | McKendrick #6 | 9,500 | 47935024 |
| 372022 | Apr 12, 1990 | Apr 12, 1990 | Transamerican Natural Gas Corp. | Carr #51 | 9,600 | 47935023 |
| 371785 | Apr 9, 1990 | Apr 9, 1990 | Chevron U. S. A. Inc. | Bruni Mineral Trust #B 15 | 10,500 | 47935020 |
| 371936 | Apr 6, 1990 | Apr 6, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Hereford, L.M. #40 | 9,000 | 47935022 |
| 371936Amendment | Apr 6, 1990 | Apr 6, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Hereford, L.M. #40 | 8,200 | 47935022 |
| 371628 | Apr 2, 1990 | Apr 2, 1990 | Cox Oil & Gas, Inc. | Ruben Gonzalez Gas Unit #5A | 14,500 | 47935019 |
| 371605 | Mar 30, 1990 | Mar 30, 1990 | Forest Oil Corp. | Vaquillas Ranch Co., Ltd #37 | 11,000 | 47935018 |
| 371499 | Mar 28, 1990 | Mar 28, 1990 | Cox Oil & Gas, Inc. | Armstrong Ranch #1 | 15,222 | 47934299 |
| 371499Amendment | Mar 28, 1990 | Mar 28, 1990 | Cox Oil & Gas, Inc. | Armstrong Ranch #1 | 15,222 | 47934299 |
| 371311 | Mar 22, 1990 | Mar 22, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Leyendecker #4 | 9,200 | 47935017 |
| 371180 | Mar 22, 1990 | Mar 22, 1990 | Conoco Inc. | Vaquillas Ranch A-2 #60 | 9,695 | 47934583 |
| 371096 | Mar 22, 1990 | Mar 22, 1990 | Chevron U. S. A. Inc. | McKendrick, M.L.E.I. #3 | 9,800 | 47933790 |
| 371157 | Mar 21, 1990 | Mar 21, 1990 | Conoco Inc. | Benavides, Rosa V. "A" #37 | 9,500 | 47935016 |
| 371157Amendment | Mar 21, 1990 | Mar 21, 1990 | Conoco Inc. | Benavides, Rosa V.-B1 #37 | 9,500 | 47935016 |
| 371087 | Mar 20, 1990 | Mar 20, 1990 | TDC Engineering, Inc. | Leal 667 #2 | 13,000 | 47935015 |
| 371035 | Mar 20, 1990 | Mar 20, 1990 | Killam Oil Company | Rodriguez Cattle Company #2 | 8,000 | 47934372 |
| 370905 | Mar 15, 1990 | Mar 15, 1990 | Enron Oil & Gas Company | Hirsch Estate 2093 #3 | 9,550 | 47935014 |
| 370905Amendment | Mar 15, 1990 | Mar 15, 1990 | Enron Oil & Gas Company | Hirsch Estate 2093 #3 | 9,550 | 47935014 |
| 370756 | Mar 15, 1990 | Mar 15, 1990 | Rowden Oil & Gas, Inc. | Leal, Pedro #1 | 6,300 | 47934830 |
| 370886 | Mar 13, 1990 | Mar 13, 1990 | Transamerican Natural Gas Corp. | Lundell #63 | 10,500 | 47935013 |
| 370704 | Mar 12, 1990 | Mar 12, 1990 | Forest Oil Corp. | Vaquillas Ranch Co., Ltd #22 | 10,700 | 47933852 |
| 370703 | Mar 12, 1990 | Mar 12, 1990 | Forest Oil Corp. | Winch, L. #2 | 10,094 | 47932604 |
| 370764 | Mar 9, 1990 | Mar 9, 1990 | Enron Oil & Gas Company | Hirsch Estate 1765 B #2 | 9,650 | 47935012 |
| 370655 | Mar 8, 1990 | Mar 8, 1990 | Tri-C Resources, Inc. | Rowden #1 | 5,800 | 47935010 |
| 370648 | Mar 7, 1990 | Mar 7, 1990 | Gutierrez, J. Roberto | Adams-Holbein #2 | 6,000 | 47935009 |
| 370642 | Mar 5, 1990 | Mar 5, 1990 | Chevron U. S. A. Inc. | Bruni Mineral Trust #B 14 | 10,200 | 47935011 |
| 370427 | Mar 5, 1990 | Mar 5, 1990 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #27 | 9,700 | 47935008 |
| 370427Amendment | Mar 5, 1990 | Mar 5, 1990 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #27 | 9,700 | 47935008 |
| 370411 | Mar 1, 1990 | Mar 1, 1990 | Transamerican Natural Gas Corp. | Carr #46 | 9,800 | 47935007 |
| 370302 | Mar 1, 1990 | Mar 1, 1990 | Chevron U. S. A. Inc. | C-Bruni Mineral Trust #22 | 8,500 | 47935004 |
| 370302Amendment | Mar 1, 1990 | Mar 1, 1990 | Chevron U. S. A. Inc. | C-Bruni Mineral Trust #22 | 8,000 | 47935004 |
| 370329 | Feb 28, 1990 | Feb 28, 1990 | Conoco Inc. | Saldivar, R. T. #10 | 11,000 | 47935005 |
| 370353 | Feb 27, 1990 | Feb 27, 1990 | Michael Petroleum Corporation | McKendrick #5 | 9,500 | 47935006 |
| 370258 | Feb 27, 1990 | Feb 27, 1990 | EP Operating Company | Benavides, S. Est. #1 | 12,611 | 47934831 |
| 370233 | Feb 26, 1990 | Feb 26, 1990 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #28 | 9,950 | 47935003 |
| 370117 | Feb 23, 1990 | Feb 23, 1990 | Pogo Producing Co. | State of Texas #1 | 10,000 | 47935001 |
| 369786 | Feb 23, 1990 | Feb 23, 1990 | Conoco Inc. | Martin, John Jr. #A 2 | 9,650 | 47934994 |
| 369786Amendment | Feb 23, 1990 | Feb 23, 1990 | Conoco Inc. | Martin, John Jr. #A 2 | 9,650 | 47934994 |
| 370112 | Feb 22, 1990 | Feb 22, 1990 | Pogo Producing Co. | Garcia, E. #1 | 10,000 | 47935002 |
| 369115 | Feb 22, 1990 | Feb 22, 1990 | Texaco Inc. | Bruni, A. M. Estate "B" #3 | 7,500 | 47934982 |
| 369948 | Feb 21, 1990 | Feb 21, 1990 | Enron Oil & Gas Company | Lundell 40 #2 | 12,150 | 47934998 |
| 370060 | Feb 20, 1990 | Feb 20, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Leyendecker-Ramirez Gas Unit 1 #2 | 9,150 | 47934999 |
| 370060Amendment | Feb 20, 1990 | Feb 20, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Leyendecker-Ramirez Gas Unit 1 #2 | 9,000 | 47934999 |
| 370060Amendment | Feb 20, 1990 | Feb 20, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Leyendecker-Ramirez GU 1 #2 | 9,000 | 47934999 |
| 369888 | Feb 20, 1990 | Feb 20, 1990 | Hughes, Dan A. Company | Adams, L. M. "E" #1 | 5,500 | 47934997 |
| 369913 | Feb 15, 1990 | Feb 15, 1990 | Transamerican Natural Gas Corp. | Lundell #62 | 10,500 | 47934996 |
| 369721 | Feb 15, 1990 | Feb 15, 1990 | Conoco Inc. | Vaquillas Ranch A6 #41 | 12,050 | 47933728 |
| 369861 | Feb 14, 1990 | Feb 14, 1990 | Michael Petroleum Corporation | Martin, Sophie J. #7 | 9,800 | 47934995 |
| 369703 | Feb 12, 1990 | Feb 12, 1990 | Enron Oil & Gas Company | Bruni Mineral "A" #13 | 11,000 | 47934993 |
| 369648 | Feb 12, 1990 | Feb 12, 1990 | Conoco Inc. | Vergara, Ignacio #2 | 10,950 | 47934992 |
| 369609 | Feb 12, 1990 | Feb 12, 1990 | Cox Oil & Gas, Inc. | Armstrong 258 #1 | 14,795 | 47934506 |
| 369418 | Feb 8, 1990 | Feb 8, 1990 | Enron Oil & Gas Company | Bruni Mineral C #8 | 11,850 | 47934990 |
| 369418Amendment | Feb 8, 1990 | Feb 8, 1990 | Enron Oil & Gas Company | Bruni Mineral C #8 | 11,850 | 47934990 |
| 369561 | Feb 7, 1990 | Feb 7, 1990 | Enron Oil & Gas Company | Vaquillas Ranch 136 #2 | 10,250 | 47934991 |
| 369458 | Feb 5, 1990 | Feb 5, 1990 | Transamerican Natural Gas Corp. | Lundell #60 | 10,000 | 47934989 |
| 369430 | Feb 5, 1990 | Feb 5, 1990 | Killam Oil Company | McGrath #3 | 1,500 | 47934988 |
| 369375 | Feb 1, 1990 | Feb 1, 1990 | Lewis Petro Properties, Inc. | Cerrito Land Co. #5D | 6,300 | 47934987 |
| 369374 | Feb 1, 1990 | Feb 1, 1990 | Pierce Junction Petroleum Inc. | State of Texas #1H | 7,100 | 47934986 |
| 369313 | Jan 31, 1990 | Jan 31, 1990 | Enron Oil & Gas Company | Hirsch Estate 538 #2 | 9,550 | 47934984 |
| 369312 | Jan 31, 1990 | Jan 31, 1990 | Enron Oil & Gas Company | Roscher, W. C. 518 #3 | 9,520 | 47934985 |
| 369276 | Jan 30, 1990 | Jan 30, 1990 | Sanchez-O'Brien Oil & Gas Corp. | Casso Ltd #2H | 9,200 | 47934884 |
| 369157 | Jan 30, 1990 | Jan 30, 1990 | Columbus Energy Corp. | Llanos, M. H. #4 | 7,500 | 47934983 |
| 369157Amendment | Jan 30, 1990 | Jan 30, 1990 | Columbus Energy Corp. | Llanos, M. H. #4 | 7,624 | 47934983 |
| 368905 | Jan 26, 1990 | Jan 26, 1990 | Enron Oil & Gas Company | Lincoln, W. P. 2345 #2 | 8,950 | 47934981 |
| 368923 | Jan 25, 1990 | Jan 25, 1990 | Lewis Petro Properties, Inc. | Long, J. E. #3 | 7,350 | 47934980 |
| 368904 | Jan 24, 1990 | Jan 24, 1990 | Enron Oil & Gas Company | Bruni Mineral "C" #7 | 11,800 | 47934979 |
| 368904Amendment | Jan 24, 1990 | Jan 24, 1990 | Enron Oil & Gas Company | Bruni Mineral C #7 | 11,800 | 47934979 |
| 368891 | Jan 23, 1990 | Jan 23, 1990 | Enron Oil & Gas Company | Lessor, Mary Etta #3 | 5,900 | 47933177 |
| 368900 | Jan 22, 1990 | Jan 22, 1990 | Enron Oil & Gas Company | Vaquillas Ranch "B" 1629 #6 | 10,250 | 47934978 |
| 368822 | Jan 19, 1990 | Jan 19, 1990 | Transamerican Natural Gas Corp. | Carr #50 | 9,600 | 47934977 |
| 368711 | Jan 17, 1990 | Jan 17, 1990 | Transamerican Natural Gas Corp. | Frost National Bank #37 | 8,500 | 47934975 |
| 368680 | Jan 17, 1990 | Jan 17, 1990 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #26 | 8,600 | 47934976 |
| 368680Amendment | Jan 17, 1990 | Jan 17, 1990 | Mobil Producing TX. & N.M. Inc. | South Callaghan Ranch #26 | 8,600 | 47934976 |
| 367706 | Jan 16, 1990 | Jan 16, 1990 | Hamilton, J. R. & Archer, J.R. | Dobie, Vivian #1 | 9,500 | 47934974 |