| 340231 | Dec 17, 1987 | Dec 17, 1987 | Transamerican Natural Gas Corp. | Webb | Briscoe "A" #3 | 9,500 | 47934340 |
| 339776 | Dec 7, 1987 | Dec 7, 1987 | Transamerican Natural Gas Corp. | Webb | Hein "B" #4 | 10,500 | 47934614 |
| 339636 | Dec 4, 1987 | Dec 4, 1987 | Transamerican Natural Gas Corp. | Webb | Hereford #21 | 8,500 | 47934613 |
| 339654 | Dec 3, 1987 | Dec 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Guerra "L" #3 | 10,500 | 50532399 |
| 339250 | Nov 25, 1987 | Nov 25, 1987 | Transamerican Natural Gas Corp. | Zapata | La Perla "B" #4 | 10,000 | 50532396 |
| 339303 | Nov 24, 1987 | Nov 24, 1987 | Transamerican Natural Gas Corp. | Zapata | Munoz-Gutierrez G.U. #1 | 14,500 | 50532394 |
| 338959 | Nov 19, 1987 | Nov 19, 1987 | Transamerican Natural Gas Corp. | Zapata | Bernardo Gas Unit #1 | 14,000 | 50532393 |
| 338789 | Nov 13, 1987 | Nov 13, 1987 | Transamerican Natural Gas Corp. | Zapata | J.O.D. #1 | 12,000 | 50532392 |
| 338568 | Nov 12, 1987 | Nov 12, 1987 | Transamerican Natural Gas Corp. | Webb | Frost National Bank #29 | 8,400 | 47934605 |
| 338496 | Nov 6, 1987 | Nov 6, 1987 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, O. "B" #2 | 14,500 | 50532390 |
| 337983 | Oct 28, 1987 | Oct 28, 1987 | Transamerican Natural Gas Corp. | Zapata | Yzaguirre-Leo G.V. 1 #1 | 12,000 | 50532387 |
| 337608 | Oct 21, 1987 | Oct 21, 1987 | Transamerican Natural Gas Corp. | Zapata | Asche #15 | 10,500 | 50532383 |
| 337156 | Oct 20, 1987 | Oct 20, 1987 | Transamerican Natural Gas Corp. | Zapata | Bustamante G.U. #1 #3 | 14,500 | 50532377 |
| 337510 | Oct 19, 1987 | Oct 19, 1987 | Transamerican Natural Gas Corp. | Zapata | Garza, L. #6 | 12,000 | 50532380 |
| 336488 | Sep 25, 1987 | Sep 25, 1987 | Transamerican Natural Gas Corp. | Zapata | Diamantina #1 | 10,500 | 50532375 |
| 336383 | Sep 23, 1987 | Sep 23, 1987 | Transamerican Natural Gas Corp. | Zapata | Benavides, C. Y. #1 | 9,200 | 50532373 |
| 336383Amendment | Sep 23, 1987 | Sep 23, 1987 | Transamerican Natural Gas Corp. | Zapata | Benavides, C. Y. #1 | 9,700 | 50532373 |
| 336382 | Sep 23, 1987 | Sep 23, 1987 | Transamerican Natural Gas Corp. | Zapata | Dolores #1 | 13,800 | 50532374 |
| 335917 | Sep 16, 1987 | Sep 16, 1987 | Transamerican Natural Gas Corp. | Zapata | Herbst #11 | 9,200 | 50532370 |
| 335917Amendment | Sep 16, 1987 | Sep 16, 1987 | Transamerican Natural Gas Corp. | Zapata | Herbst #11 | 9,200 | 50532370 |
| 335917Amendment | Sep 16, 1987 | Sep 16, 1987 | Transamerican Natural Gas Corp. | Zapata | Herbst #11 | 9,200 | 50532370 |
| 335830 | Sep 11, 1987 | Sep 11, 1987 | Transamerican Natural Gas Corp. | Zapata | McMurrey #45 | 10,500 | 50532369 |
| 335114 | Sep 9, 1987 | Sep 9, 1987 | Transamerican Natural Gas Corp. | Webb | B. M. T. #23 | 11,500 | 47934574 |
| 335586 | Sep 4, 1987 | Sep 4, 1987 | Transamerican Natural Gas Corp. | Webb | Hein "B" #3 | 7,500 | 47934579 |
| 335585 | Sep 4, 1987 | Sep 4, 1987 | Transamerican Natural Gas Corp. | Zapata | L. F. T. #1 | 12,000 | 50532366 |
| 335584 | Sep 4, 1987 | Sep 4, 1987 | Transamerican Natural Gas Corp. | Zapata | Jacoba #3 | 14,000 | 50532365 |
| 333959 | Aug 3, 1987 | Aug 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, J. M. #5 | 10,200 | 50532356 |
| 333958 | Aug 3, 1987 | Aug 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Haynes #5 | 14,500 | 50532357 |
| 333958Amendment | Aug 3, 1987 | Aug 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Haynes #5 | 14,500 | 50532357 |
| 333795 | Jul 30, 1987 | Jul 30, 1987 | Transamerican Natural Gas Corp. | Webb | Frost National Bank #28 | 8,600 | 47934562 |
| 333555 | Jul 29, 1987 | Jul 29, 1987 | Transamerican Natural Gas Corp. | Zapata | Jennings Ranch "B" #10 | 11,000 | 50532355 |
| 333556 | Jul 28, 1987 | Jul 28, 1987 | Transamerican Natural Gas Corp. | Webb | 7-B Cattle Co. "D" #1 | 12,700 | 47934560 |
| 333556Amendment | Jul 28, 1987 | Jul 28, 1987 | Transamerican Natural Gas Corp. | Webb | 7-B Cattle Company "D" #1 | 12,700 | 47934560 |
| 332680 | Jul 10, 1987 | Jul 10, 1987 | Transamerican Natural Gas Corp. | Webb | Villarreal "F" #2 | 12,300 | 47935043 |
| 332637 | Jul 8, 1987 | Jul 8, 1987 | Transamerican Natural Gas Corp. | Zapata | Herbst #9 | 9,300 | 50532348 |
| 332500 | Jul 6, 1987 | Jul 6, 1987 | Transamerican Natural Gas Corp. | Webb | Carr #33 | 9,000 | 47934550 |
| 332433 | Jul 6, 1987 | Jul 6, 1987 | Transamerican Natural Gas Corp. | Zapata | La Perla #75 | 10,000 | 50532347 |
| 332243 | Jul 1, 1987 | Jul 1, 1987 | Transamerican Natural Gas Corp. | Webb | Vaquillas "C" #2 | 9,500 | 47934549 |
| 332126 | Jun 25, 1987 | Jun 25, 1987 | Transamerican Natural Gas Corp. | Zapata | Munoz #2 | 14,000 | 50532339 |
| 331682 | Jun 18, 1987 | Jun 18, 1987 | Transamerican Natural Gas Corp. | Webb | Bruni Ranch #20 | 10,200 | 47934541 |
| 331143 | Jun 3, 1987 | Jun 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, J. M. #7 | 10,500 | 50532334 |
| 331142 | Jun 3, 1987 | Jun 3, 1987 | Transamerican Natural Gas Corp. | Webb | Carr #32 | 9,200 | 47934533 |
| 331141 | Jun 3, 1987 | Jun 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Asche #14 | 10,500 | 50532335 |
| 330426 | May 20, 1987 | May 20, 1987 | Transamerican Natural Gas Corp. | Zapata | Jacoba #2 | 14,000 | 50532328 |
| 330278 | May 18, 1987 | May 18, 1987 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, E. E. #3 | 14,000 | 50532324 |
| 330022 | May 8, 1987 | May 8, 1987 | Transamerican Natural Gas Corp. | Zapata | La Perla #74 | 10,200 | 50532321 |
| 329874 | May 8, 1987 | May 8, 1987 | Transamerican Natural Gas Corp. | Zapata | La Perla "B" #2 | 10,500 | 50532319 |
| 329855 | May 5, 1987 | May 5, 1987 | Transamerican Natural Gas Corp. | Webb | Day #2 | 10,000 | 47934515 |
| 329702 | May 4, 1987 | May 4, 1987 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, J. M. #6 | 10,500 | 50532318 |
| 329617 | Apr 30, 1987 | Apr 30, 1987 | Transamerican Natural Gas Corp. | Zapata | La Perla #77 | 10,000 | 50532317 |
| 329473 | Apr 30, 1987 | Apr 30, 1987 | Transamerican Natural Gas Corp. | Webb | Lundell #53 | 11,000 | 47934512 |
| 329138 | Apr 24, 1987 | Apr 24, 1987 | Transamerican Natural Gas Corp. | Zapata | De Los Santos G.U. #1 #2 | 14,500 | 50532313 |
| 329139 | Apr 21, 1987 | Apr 21, 1987 | Transamerican Natural Gas Corp. | Webb | Hereford #20 | 8,500 | 47934511 |
| 329035 | Apr 17, 1987 | Apr 17, 1987 | Transamerican Natural Gas Corp. | Webb | Hereford #19 | 8,500 | 47934509 |
| 329035Amendment | Apr 17, 1987 | Apr 17, 1987 | Transamerican Natural Gas Corp. | Webb | Hereford #19 | 8,500 | 47934509 |
| 329035Amendment | Apr 17, 1987 | Apr 17, 1987 | Transamerican Natural Gas Corp. | Webb | Hereford #19 | 8,500 | 47934509 |
| 329071 | Apr 15, 1987 | Apr 15, 1987 | Transamerican Natural Gas Corp. | Webb | Carr #31 | 10,000 | 47934507 |
| 328657 | Apr 8, 1987 | Apr 8, 1987 | Transamerican Natural Gas Corp. | Zapata | La Perla "A" #5 | 10,200 | 50532309 |
| 328499 | Apr 6, 1987 | Apr 6, 1987 | Transamerican Natural Gas Corp. | Zapata | Leonardo #10 | 10,500 | 50532307 |
| 328498 | Apr 6, 1987 | Apr 6, 1987 | Transamerican Natural Gas Corp. | Zapata | R. M. T. #1 | 12,700 | 50532305 |
| 328500 | Apr 3, 1987 | Apr 3, 1987 | Transamerican Natural Gas Corp. | Zapata | Garza, L. #5 | 14,500 | 50532306 |
| 328504 | Apr 1, 1987 | Apr 1, 1987 | Transamerican Natural Gas Corp. | Webb | Frost National Bank #27 | 10,600 | 47934501 |
| 327528 | Mar 11, 1987 | Mar 11, 1987 | Transamerican Natural Gas Corp. | Webb | Hein "B" #2 | 10,200 | 47934492 |
| 327375 | Mar 9, 1987 | Mar 9, 1987 | Transamerican Natural Gas Corp. | Webb | Rottersman #8 | 11,000 | 47934491 |
| 327370 | Mar 9, 1987 | Mar 9, 1987 | Transamerican Natural Gas Corp. | Zapata | Asche #13 | 10,500 | 50532296 |
| 327071 | Mar 3, 1987 | Mar 3, 1987 | Transamerican Natural Gas Corp. | Webb | Frost, P. M. "D" #1 | 11,500 | 47934487 |
| 326981 | Feb 26, 1987 | Feb 26, 1987 | Transamerican Natural Gas Corp. | Webb | Hein, G & G #2 | 9,000 | 47934485 |
| 326894 | Feb 25, 1987 | Feb 25, 1987 | Transamerican Natural Gas Corp. | Zapata | Garza "D" GU #1 #1 | 14,500 | 50532291 |
| 326318 | Feb 11, 1987 | Feb 11, 1987 | Transamerican Natural Gas Corp. | Zapata | Irene #1 | 14,500 | 50532285 |
| 325997 | Feb 9, 1987 | Feb 9, 1987 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, H. G. #2 | 10,500 | 50532282 |
| 325996 | Feb 2, 1987 | Feb 2, 1987 | Transamerican Natural Gas Corp. | Zapata | Leonardo #11 | 10,500 | 50532281 |
| 325344 | Jan 20, 1987 | Jan 20, 1987 | Transamerican Natural Gas Corp. | Webb | B.M.T. #22 | 11,500 | 47934465 |
| 325006 | Jan 6, 1987 | Jan 6, 1987 | Transamerican Natural Gas Corp. | Zapata | Haynes #4 | 14,500 | 50532277 |
| 323940 | Dec 9, 1986 | Dec 9, 1986 | Transamerican Natural Gas Corp. | Zapata | Jennings Ranch "B" #9 | 11,000 | 50532268 |
| 323617 | Dec 2, 1986 | Dec 2, 1986 | Transamerican Natural Gas Corp. | Webb | Frost National Bank #26 | 10,600 | 47934453 |
| 323617Amendment | Dec 2, 1986 | Dec 2, 1986 | Transamerican Natural Gas Corp. | Webb | Frost National Bank #26 | 11,500 | 47934453 |
| 323141 | Nov 18, 1986 | Nov 18, 1986 | Transamerican Natural Gas Corp. | Webb | Frost, P. M. "B" #2 | 11,600 | 47935134 |
| 323097 | Nov 17, 1986 | Nov 17, 1986 | Transamerican Natural Gas Corp. | Webb | Bruni Ranch #19 | 10,100 | 47934447 |
| 322824 | Nov 13, 1986 | Nov 13, 1986 | Transamerican Natural Gas Corp. | Zapata | La Perla #76 | 10,000 | 50532261 |
| 322823 | Nov 13, 1986 | Nov 13, 1986 | Transamerican Natural Gas Corp. | Zapata | La Perla "B" #3 | 10,000 | 50532260 |
| 322548 | Nov 4, 1986 | Nov 4, 1986 | Transamerican Natural Gas Corp. | Zapata | Fernando #4 | 10,100 | 50532257 |
| 322352 | Oct 28, 1986 | Oct 28, 1986 | Transamerican Natural Gas Corp. | Zapata | Asche #12 | 10,800 | 50532254 |
| 337732 | Oct 23, 1986 | Oct 23, 1986 | Transamerican Natural Gas Corp. | Zapata | De Los Santos GU 1 #1 | 12,000 | 50532386 |
| 322068 | Oct 22, 1986 | Oct 22, 1986 | Transamerican Natural Gas Corp. | Webb | Lundell "D" #1 | 11,400 | 47934434 |
| 321467 | Oct 17, 1986 | Oct 17, 1986 | Transamerican Natural Gas Corp. | Zapata | Bustamante G.U. #1 #2 | 14,500 | 50532242 |
| 321828 | Oct 15, 1986 | Oct 15, 1986 | Transamerican Natural Gas Corp. | Zapata | Flores, L. G. #3 | 14,500 | 50532249 |
| 321754 | Oct 15, 1986 | Oct 15, 1986 | Transamerican Natural Gas Corp. | Webb | Cavazos "B" #1 | 10,000 | 47934429 |
| 321466 | Oct 9, 1986 | Oct 9, 1986 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, E. E. #2 | 14,000 | 50532243 |
| 320732 | Sep 19, 1986 | Sep 19, 1986 | Transamerican Natural Gas Corp. | Zapata | La Perla #73 | 10,200 | 50532237 |
| 320678 | Sep 19, 1986 | Sep 19, 1986 | Transamerican Natural Gas Corp. | Zapata | Munoz #3 | 14,000 | 50532236 |
| 320677 | Sep 19, 1986 | Sep 19, 1986 | Transamerican Natural Gas Corp. | Zapata | Jacoba #1 | 14,000 | 50532235 |
| 320676 | Sep 19, 1986 | Sep 19, 1986 | Transamerican Natural Gas Corp. | Zapata | Gutierrez, J. M. #4 | 10,500 | 50532234 |
| 320529 | Sep 19, 1986 | Sep 19, 1986 | Transamerican Natural Gas Corp. | Zapata | Martinez, T. Ranch #1 | 14,500 | 50532232 |
| 320530 | Sep 18, 1986 | Sep 18, 1986 | Transamerican Natural Gas Corp. | Zapata | Garza, L. #4 | 14,000 | 50532233 |
| 320033 | Sep 5, 1986 | Sep 5, 1986 | Transamerican Natural Gas Corp. | Zapata | Bustamante G.U. #1 #3 | 14,500 | 50532377 |
| 305380 | Aug 19, 1986 | Aug 19, 1986 | Transamerican Natural Gas Corp. | Zapata | Leonardo #9 | 10,500 | 50532224 |
| 304682 | Jul 29, 1986 | Jul 29, 1986 | Transamerican Natural Gas Corp. | Zapata | Juana #4 | 10,000 | 50532218 |
| 304681 | Jul 29, 1986 | Jul 29, 1986 | Transamerican Natural Gas Corp. | Webb | McLean, Marrs "C" #7 | 12,300 | 47934404 |
| 304500 | Jul 24, 1986 | Jul 24, 1986 | Transamerican Natural Gas Corp. | Webb | State Lease "B" #2 | 12,300 | 47934747 |
| 304502 | Jul 24, 1986 | Jul 24, 1986 | Transamerican Natural Gas Corp. | Webb | Frost National Bank #25 | 10,600 | 47934400 |