| 337157 | Oct 13, 1987 | Oct 13, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #31 | 8,600 | 47934588 |
| 335764 | Sep 10, 1987 | Sep 10, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #29 | 8,550 | 47934580 |
| 334124 | Aug 6, 1987 | Aug 6, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L.M. #28 | 9,100 | 47934563 |
| 333747 | Aug 3, 1987 | Aug 3, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Matagorda | Bunk, J. F. #2 | 10,500 | 32131545 |
| 333668 | Jul 30, 1987 | Jul 30, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #27 | 8,500 | 47934561 |
| 333668Amendment | Jul 30, 1987 | Jul 30, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #27 | 7,400 | 47934561 |
| 333668Amendment | Jul 30, 1987 | Jul 30, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #27 | 7,400 | 47934561 |
| 332655 | Jul 13, 1987 | Jul 13, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #26 | 9,100 | 47934551 |
| 331327 | Jun 10, 1987 | Jun 10, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #25 | 8,400 | 47934538 |
| 330580 | May 28, 1987 | May 28, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #24 | 9,200 | 47934526 |
| 329773 | May 7, 1987 | May 7, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #23 | 8,700 | 47934514 |
| 328563 | Apr 6, 1987 | Apr 6, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #22 | 8,600 | 47934503 |
| 327705 | Mar 17, 1987 | Mar 17, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #21 | 8,700 | 47934496 |
| 327705Amendment | Mar 17, 1987 | Mar 17, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #21 | 8,700 | 47934496 |
| 326521 | Feb 18, 1987 | Feb 18, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #20 | 8,700 | 47934480 |
| 326521Amendment | Feb 18, 1987 | Feb 18, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #20 | 8,700 | 47934480 |
| 325358 | Jan 12, 1987 | Jan 12, 1987 | Sanchez-O'Brien Oil & Gas Corp. | Matagorda | Bunk, J. F. #1 | 10,300 | 32131535 |
| 324618 | Dec 30, 1986 | Dec 30, 1986 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. "B" #19 | 9,700 | 47934459 |
| 322049 | Oct 22, 1986 | Oct 22, 1986 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. "B" #17 | 9,500 | 47934433 |
| 321892 | Oct 20, 1986 | Oct 20, 1986 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #18 | 9,500 | 47934432 |
| 303162 | Jun 12, 1986 | Jun 12, 1986 | Sanchez-O'Brien Oil & Gas Corp. | Harris | King #1 | 9,800 | 20132038 |
| 301647 | Apr 29, 1986 | Apr 29, 1986 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | State Tract 40 #1 | 10,100 | 07131572 |
| 294321 | Jan 3, 1986 | Jan 3, 1986 | Sanchez-O'Brien Oil & Gas Corp. | Polk | Arco Fee "D" #1 | 9,000 | 37330637 |
| 290136 | Nov 15, 1985 | Nov 15, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Norris GU 1 #1 | 8,600 | 35531401 |
| 287910 | Oct 18, 1985 | Oct 18, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | State Tract 40 #1 | 10,100 | 07131572 |
| 275957 | May 23, 1985 | May 23, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Polk | Arco Fee "C" #1 | 9,000 | 37330619 |
| 273903 | May 2, 1985 | May 2, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Irion | Tsrh #1 | 8,905 | 23531713 |
| 273649 | Apr 1, 1985 | Apr 1, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Matagorda | Heffelfinger Heirs #1 | 12,700 | 32131367 |
| 268886 | Mar 6, 1985 | Mar 6, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | B. B. Rogers Gas Unit No. 1 #2 | 10,200 | 07131688 |
| 270442 | Feb 19, 1985 | Feb 19, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Laurel, Angel R. #2 | 12,500 | 50531513 |
| 266159 | Feb 6, 1985 | Feb 6, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | State Tract 39 #2 | 10,100 | 07131675 |
| 265462 | Jan 29, 1985 | Jan 29, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Polk | Arco Fee "B" #1 | 9,000 | 37330612 |
| 263510 | Jan 8, 1985 | Jan 8, 1985 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | B. B. Rogers Gas Unit No. 2 #2 | 10,100 | 07131666 |
| 256200 | Oct 31, 1984 | Oct 31, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Orange | Beaumont Land Co., Ltd. #1ST | 10,000 | 36130506 |
| 255648 | Oct 25, 1984 | Oct 25, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Polk | Arco Fee "A" #1 | 9,200 | 37330601 |
| 252441 | Sep 25, 1984 | Sep 25, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Brysch Gas Unit No. 1 #1 | 11,800 | 29731594 |
| 248658 | Aug 16, 1984 | Aug 16, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Liberty | Roberts, F. S. #2 | 7,800 | 29131823 |
| 247833 | Aug 9, 1984 | Aug 9, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Bobby Lynn King Gas Unit #1 | 9,000 | 35531287 |
| 247632 | Aug 7, 1984 | Aug 7, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | State Tract 39 #1 | 10,500 | 07131599 |
| 245104 | Jul 13, 1984 | Jul 13, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Garcia, Estella #2 | 7,000 | 13133623 |
| 244135 | Jul 3, 1984 | Jul 3, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Pena, Catarino #1 | 8,500 | 47933922 |
| 240652 | May 31, 1984 | May 31, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | State Tract 40 #1 | 11,000 | 07131572 |
| 239879 | May 22, 1984 | May 22, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Liberty | Roberts, F. S. #1 | 10,000 | 29131796 |
| 240043 | May 22, 1984 | May 22, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Polk | Arco Fee #1 | 10,500 | 37330589 |
| 243473 | May 4, 1984 | May 4, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #16 | 9,500 | 47933783 |
| 236570 | Apr 24, 1984 | Apr 24, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Matagorda | Heffelfinger Heirs #2 | 12,500 | 32131377 |
| 233472 | Mar 23, 1984 | Mar 23, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Geffert Gas Unit No. 1 #1 | 12,000 | 29731866 |
| 230700 | Feb 27, 1984 | Feb 27, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Gutierrez, Oscar M. et Al #1 | 9,800 | 50531180 |
| 228016 | Jan 31, 1984 | Jan 31, 1984 | Sanchez-O'Brien Oil & Gas Corp. | Matagorda | Heffelfinger Heirs #1 | 12,700 | 32131367 |
| 223303 | Dec 9, 1983 | Dec 9, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford, L. M. #16 | 9,500 | 47933783 |
| 221951 | Nov 28, 1983 | Nov 28, 1983 | Sanchez-O'Brien Oil & Gas Corp. | McMullen | Glasscock-Frost #1 | 11,500 | 31131650 |
| 221111 | Nov 21, 1983 | Nov 21, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Galveston | A. L. Terrell Unit #1 | 10,400 | 16730968 |
| 220968 | Nov 16, 1983 | Nov 16, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Brysch-Owens Gas Unit 1 #1 | 14,000 | 29733232 |
| 220489 | Nov 14, 1983 | Nov 14, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Richter Gas Unit No. 1 #1 | 13,500 | 29733375 |
| 220045 | Nov 7, 1983 | Nov 7, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | B. B. Rogers Gas Unit 3 #1 | 10,500 | 07131494 |
| 208680 | Aug 30, 1983 | Aug 30, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Garcia, Estella #2 | 7,000 | 13133623 |
| 197708 | Jun 3, 1983 | Jun 3, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Welder, J. F. Heirs #1591 | 12,975 | 13136238 |
| 192238 | Apr 20, 1983 | Apr 20, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Oliveira, L. T. et Al #1 A | 5,512 | 13135187 |
| 197097 | Apr 8, 1983 | Apr 8, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Geffert Gas Unit No. 2 #1 | 13,500 | 29733306 |
| 189718 | Mar 28, 1983 | Mar 28, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | Haynes, J. F. #1 | 10,200 | 07131439 |
| 188780 | Mar 15, 1983 | Mar 15, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Wright Trust #3 | 6,000 | 35530876 |
| 188778 | Mar 15, 1983 | Mar 15, 1983 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Wright Trust #1 | 8,500 | 35530810 |
| 181717 | Dec 30, 1982 | Dec 30, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Martin, Sophie J. #2 | 10,500 | 47932393 |
| 181987 | Dec 17, 1982 | Dec 17, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Laurel, Angel R. #2 | 12,500 | 50531513 |
| 179259 | Dec 7, 1982 | Dec 7, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | Wangensteen, C. T. et. Al. #1 | 11,500 | 07131396 |
| 178925 | Nov 24, 1982 | Nov 24, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Brysch Gas Unit No. 2 #3 | 14,000 | 29733255 |
| 176833 | Nov 8, 1982 | Nov 8, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Pavelka Gas Unit #1 | 9,000 | 35531478 |
| 173714 | Oct 6, 1982 | Oct 6, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Brysch-Owens G/U NO.1 #1 | 1,400 | 29733232 |
| 173200 | Sep 29, 1982 | Sep 29, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | West, George G/U No. 2 #4 | 13,458 | 29733219 |
| 172355 | Sep 20, 1982 | Sep 20, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Renken, Edgar #1 | 9,600 | 35532070 |
| 169797 | Aug 19, 1982 | Aug 19, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Galveston | State Tract 85-A #1 | 8,500 | 16730906 |
| 168341 | Aug 5, 1982 | Aug 5, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Sterling | Council, Mary E. et Al #1 | 7,500 | 43131077 |
| 168274 | Aug 5, 1982 | Aug 5, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Martin, S. J. #2A | 11,500 | 47932460 |
| 167530 | Jul 28, 1982 | Jul 28, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Bodden-Frost G/U NO.1 #3 | 11,000 | 29733203 |
| 165190 | Jun 30, 1982 | Jun 30, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | 3D Ranches Ltd. Gas Unit No. 1 #1 | 8,831 | 50531185 |
| 165181 | Jun 30, 1982 | Jun 30, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Bodden, Charles L. #6 | 11,500 | 29732661 |
| 159284 | Apr 21, 1982 | Apr 21, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | B.B. Rogers Gas Unit 2 #1 | 10,100 | 07131338 |
| 156850 | Apr 15, 1982 | Apr 15, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Laurel, Angel R. #2 | 12,500 | 50531513 |
| 158828 | Apr 9, 1982 | Apr 9, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Bodden-Frost G/U NO.1 #2 | 12,500 | 29733018 |
| 158270 | Apr 7, 1982 | Apr 7, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Owens, Kittie West et Al #1 | 11,000 | 29733008 |
| 154281 | Mar 12, 1982 | Mar 12, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Brysch Gas Unit No. 2 #2 | 12,000 | 29732989 |
| 152979 | Mar 12, 1982 | Mar 12, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | Heath-Lawrence #1 | 8,200 | 35531545 |
| 151324 | Feb 16, 1982 | Feb 16, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Pawlik Gas Unit No. 1 #2 | 1,200 | 29732657 |
| 148735 | Jan 27, 1982 | Jan 27, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Bodden-Frost Gas Unit #1 #1 | 12,500 | 29732067 |
| 148604 | Jan 26, 1982 | Jan 26, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Hereford-Martinez Gas Unit 1 #1 | 10,200 | 47933237 |
| 148288 | Jan 21, 1982 | Jan 21, 1982 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Bodden, Charles L. #7 | 12,000 | 29732962 |
| 146727 | Dec 31, 1981 | Dec 31, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Galveston | Fleming, Patrick Allen Unit NO.1 #1 | 10,500 | 16730875 |
| 146351 | Dec 31, 1981 | Dec 31, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Galveston | Mockridge-Richardson Unit #1 | 7,502 | 16730879 |
| 145605 | Dec 28, 1981 | Dec 28, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Vaquillas Ranch Ltd. "B" #1 | 12,900 | 50531461 |
| 143149 | Dec 4, 1981 | Dec 4, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Liberty | Willis Estate #1 | 8,320 | 29131485 |
| 141400 | Nov 25, 1981 | Nov 25, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Sterling | Council, Mary E. et Al #1 | 7,500 | 43131077 |
| 141179 | Nov 19, 1981 | Nov 19, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Live Oak | Crocker, William M. #1 | 12,000 | 29732936 |
| 141175 | Nov 17, 1981 | Nov 17, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Chambers | B.B. Rogers Gas Unit 1 #1 | 11,300 | 07131277 |
| 139676 | Nov 5, 1981 | Nov 5, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Zapata | Garza, Lauro et Al #1 | 13,700 | 50531298 |
| 139675 | Nov 5, 1981 | Nov 5, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Webb | Martin, Sophie J. #2 | 10,500 | 47932393 |
| 134804 | Sep 29, 1981 | Sep 29, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Gaines | Schumacker, Harry C. et Al #1 | 12,795 | 16532226 |
| 134973 | Sep 28, 1981 | Sep 28, 1981 | Sanchez-O'Brien Oil & Gas Corp. | McMullen | Glasscock-Frost #1 | 11,500 | 31131650 |
| 134463 | Sep 25, 1981 | Sep 25, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Nueces | State Tract "G" Gas Unit 1 #2 | 14,500 | 35531842 |
| 134617 | Sep 22, 1981 | Sep 22, 1981 | Sanchez-O'Brien Oil & Gas Corp. | Duval | Equity Trust #1 | 11,327 | 13135481 |
| 134237 | Sep 18, 1981 | Sep 18, 1981 | Sanchez-O'Brien Oil & Gas Corp. | McMullen | Holland, Robert et Al #1 | 9,300 | 31131649 |