| 524905 | Oct 23, 2002 | Oct 23, 2002 | Howell Petroleum Corporation | Parker | M & J Bar None #1 | 6,400 | 36733404 |
| 523581 | Sep 10, 2002 | Sep 10, 2002 | Howell Petroleum Corporation | Parker | Hayter, A.L. #1 | 5,700 | 36733399 |
| 521844 | Jul 15, 2002 | Jul 15, 2002 | Howell Petroleum Corporation | Parker | Bussey #1 | 6,450 | 36733405 |
| 514899 | Oct 30, 2001 | Oct 30, 2001 | Howell Petroleum Corporation | Parker | Bussey #1 | 6,300 | 36733405 |
| 514899Amendment | Oct 30, 2001 | Oct 30, 2001 | Howell Petroleum Corporation | Parker | Bussey #1 | 6,450 | 36733405 |
| 514472 | Oct 15, 2001 | Oct 15, 2001 | Howell Petroleum Corporation | Parker | M & J Bar None #1 | 6,400 | 36733404 |
| 513787 | Sep 20, 2001 | Sep 20, 2001 | Howell Petroleum Corporation | Parker | Hayter, A.L. #1 | 5,700 | 36733399 |
| 513787Amendment | Sep 20, 2001 | Sep 20, 2001 | Howell Petroleum Corporation | Parker | Hayter, A.L. #1 | 5,700 | 36733399 |
| 486526 | Aug 9, 1999 | Aug 9, 1999 | Howell Petroleum Corporation | Brazos | Varisco Estate #2 | 7,761 | 04131204 |
| 483898 | Apr 15, 1999 | Apr 15, 1999 | Howell Petroleum Corporation | Brazos | Newberry #3 | 7,685 | 04131361 |
| 454154 | Oct 24, 1996 | Oct 24, 1996 | Howell Petroleum Corporation | Orange | Southern Pacific #1 | 11,200 | 36130732 |
| 454154Amendment | Oct 24, 1996 | Oct 24, 1996 | Howell Petroleum Corporation | Orange | Southern Pacific #1 | 11,200 | 36130732 |
| 449519 | Jul 23, 1996 | Jul 23, 1996 | Howell Petroleum Corporation | Galveston | Hudgins #1 | 10,600 | 16731273 |
| 435499 | May 5, 1995 | May 5, 1995 | Howell Petroleum Corporation | Brazos | Newberry #4HH | 7,060 | 04131377 |
| 435499Amendment | May 5, 1995 | May 5, 1995 | Howell Petroleum Corporation | Brazos | Newberry #4HH | 7,056 | 04131377 |
| 435499Amendment | May 5, 1995 | May 5, 1995 | Howell Petroleum Corporation | Brazos | Newberry #4HH | 7,200 | 04131377 |
| 433115 | Feb 27, 1995 | Feb 27, 1995 | Howell Petroleum Corporation | Throckmorton | HPC 2314 Davis #1 | 4,800 | 44735544 |
| 433116 | Feb 24, 1995 | Feb 24, 1995 | Howell Petroleum Corporation | Throckmorton | List 2329 #1 | 4,800 | 44735542 |
| 433114 | Feb 24, 1995 | Feb 24, 1995 | Howell Petroleum Corporation | Throckmorton | HPC 2315 Davis #1 C | 4,800 | 44735543 |
| 428697 | Oct 3, 1994 | Oct 3, 1994 | Howell Petroleum Corporation | Throckmorton | Cochran 2316 #1 | 4,800 | 44735502 |
| 428697Amendment | Oct 3, 1994 | Oct 3, 1994 | Howell Petroleum Corporation | Throckmorton | Cochran 2316 #1 | 4,800 | 44735502 |
| 428695 | Oct 3, 1994 | Oct 3, 1994 | Howell Petroleum Corporation | Throckmorton | Davis 2317 #1 | 4,850 | 44735504 |
| 428080 | Sep 19, 1994 | Sep 19, 1994 | Howell Petroleum Corporation | Kent | Johnson, et al 49-6 #1 | 7,850 | 26331535 |
| 427064 | Aug 19, 1994 | Aug 19, 1994 | Howell Petroleum Corporation | Kent | Mays Trusts 21-3 #1 | 7,700 | 26331533 |
| 426698 | Aug 8, 1994 | Aug 8, 1994 | Howell Petroleum Corporation | Kent | Foster 57-6 #1 | 7,700 | 26331532 |
| 424758 | Jun 22, 1994 | Jun 22, 1994 | Howell Petroleum Corporation | Burleson | Mahlmann, Walter #1 | 8,082 | 05130561 |
| 422474 | Jun 20, 1994 | Jun 20, 1994 | Howell Petroleum Corporation | Fort Bend | Johnson #1 | 9,100 | 15731916 |
| 423116 | May 4, 1994 | May 4, 1994 | Howell Petroleum Corporation | Brazos | Brazos Bottom #1HH | 7,161 | 04131392 |
| 423116Amendment | May 4, 1994 | May 4, 1994 | Howell Petroleum Corporation | Brazos | Brazos Bottom #1HH | 7,161 | 04131392 |
| 423116Amendment | May 4, 1994 | May 4, 1994 | Howell Petroleum Corporation | Brazos | Brazos Bottoms #1HH | 7,161 | 04131392 |
| 421784 | Mar 11, 1994 | Mar 11, 1994 | Howell Petroleum Corporation | Kent | Wallace 92-3 #1 | 7,900 | 26331518 |
| 421702 | Mar 3, 1994 | Mar 3, 1994 | Howell Petroleum Corporation | Kent | Wallace 91-15 #1 | 7,900 | 26331517 |
| 410995 | Apr 27, 1993 | Apr 27, 1993 | Howell Petroleum Corporation | Wharton | Duson #4 | 9,800 | 48133631 |
| 405180 | Nov 3, 1992 | Nov 3, 1992 | Howell Petroleum Corporation | Wharton | Duson "B" #5 | 6,013 | 48132601 |
| 402167 | Aug 24, 1992 | Aug 24, 1992 | Howell Petroleum Corporation | Brazos | Newberry #2 | 7,700 | 04131300 |
| 400683 | Jul 29, 1992 | Jul 29, 1992 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #1 | 6,110 | 48132419 |
| 400683Amendment | Jul 29, 1992 | Jul 29, 1992 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #1 | 6,110 | 48132419 |
| 400065 | Jul 9, 1992 | Jul 9, 1992 | Howell Petroleum Corporation | Brazos | Varisco Estate #2 | 7,761 | 04131204 |
| 400682 | Jun 29, 1992 | Jun 29, 1992 | Howell Petroleum Corporation | Wharton | Duson "B" #5 | 6,013 | 48132601 |
| 398776 | Jun 12, 1992 | Jun 12, 1992 | Howell Petroleum Corporation | Brazos | Morello, Buddy #1 | 7,585 | 04131210 |
| 398775 | Jun 12, 1992 | Jun 12, 1992 | Howell Petroleum Corporation | Brazos | Varisco Estate #1 | 7,785 | 04131203 |
| 398777 | May 6, 1992 | May 6, 1992 | Howell Petroleum Corporation | Brazos | Newberry #3 | 7,685 | 04131361 |
| 397926 | Apr 29, 1992 | Apr 29, 1992 | Howell Petroleum Corporation | Brazos | Bryan Utilities Lake #3 | 8,330 | 04131064 |
| 398263 | Apr 15, 1992 | Apr 15, 1992 | Howell Petroleum Corporation | Brazos | Newberry #2 | 7,700 | 04131300 |
| 390881 | Aug 14, 1991 | Aug 14, 1991 | Howell Petroleum Corporation | Wharton | Duson "B" #5 | 6,013 | 48132601 |
| 390875 | Aug 14, 1991 | Aug 14, 1991 | Howell Petroleum Corporation | Wharton | Duson "D" #12 | 6,080 | 48132686 |
| 390025 | Jul 22, 1991 | Jul 22, 1991 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #1 | 6,110 | 48132419 |
| 382133 | Dec 12, 1990 | Dec 12, 1990 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #3 | 6,113 | 48132795 |
| 381570 | Nov 27, 1990 | Nov 27, 1990 | Howell Petroleum Corporation | Brazoria | Holland Estate #1 | 10,000 | 03932416 |
| 380924 | Nov 15, 1990 | Nov 15, 1990 | Howell Petroleum Corporation | Jefferson | Smith #1 | 9,800 | 24532014 |
| 372940 | May 7, 1990 | May 7, 1990 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #3 | 6,113 | 48132795 |
| 369534 | Mar 12, 1990 | Mar 12, 1990 | Howell Petroleum Corporation | Wharton | Duson #2 | 10,199 | 48132952 |
| 369974 | Feb 22, 1990 | Feb 22, 1990 | Howell Petroleum Corporation | Brazos | Newberry #1 | 7,680 | 04131272 |
| 367899 | Dec 27, 1989 | Dec 27, 1989 | Howell Petroleum Corporation | Yoakum | Box, L. R. #1 | 12,000 | 50133544 |
| 367119 | Dec 5, 1989 | Dec 5, 1989 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #2 | 6,112 | 48132723 |
| 365483 | Nov 7, 1989 | Nov 7, 1989 | Howell Petroleum Corporation | Brazos | Marino, John E. #1 | 8,550 | 04130953 |
| 358574 | Aug 15, 1989 | Aug 15, 1989 | Howell Petroleum Corporation | Brazos | Bryan Utilities Lake #4 | 8,240 | 04131138 |
| 361802 | Jul 27, 1989 | Jul 27, 1989 | Howell Petroleum Corporation | Brazos | Lazarone, M. #1 | 7,710 | 04131201 |
| 361800 | Jul 27, 1989 | Jul 27, 1989 | Howell Petroleum Corporation | Brazos | Morello, Sam #1 | 7,643 | 04131177 |
| 361798 | Jul 27, 1989 | Jul 27, 1989 | Howell Petroleum Corporation | Brazos | Kay, R. #1 | 7,590 | 04131342 |
| 358576 | Jun 13, 1989 | Jun 13, 1989 | Howell Petroleum Corporation | Brazos | Bonano Unit II #1 | 7,765 | 04131166 |
| 358575 | May 22, 1989 | May 22, 1989 | Howell Petroleum Corporation | Brazos | Bonano I #3 | 7,737 | 04131191 |
| 358579 | May 18, 1989 | May 18, 1989 | Howell Petroleum Corporation | Brazos | Sims #1 | 7,635 | 04131321 |
| 358573 | Apr 26, 1989 | Apr 26, 1989 | Howell Petroleum Corporation | Brazos | Varisco Estate #2 | 7,761 | 04131204 |
| 358572 | Apr 26, 1989 | Apr 26, 1989 | Howell Petroleum Corporation | Brazos | Newberry #4 | 7,658 | 04131377 |
| 356357 | Feb 27, 1989 | Feb 27, 1989 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #3 | 6,113 | 48132795 |
| 353018 | Nov 8, 1988 | Nov 8, 1988 | Howell Petroleum Corporation | Wharton | Duson #3 | 10,300 | 48133206 |
| 352360 | Oct 19, 1988 | Oct 19, 1988 | Howell Petroleum Corporation | Wharton | Duson "D" #12 | 6,080 | 48132686 |
| 352357 | Oct 18, 1988 | Oct 18, 1988 | Howell Petroleum Corporation | Wharton | Kubela Mineral Trust #2 | 6,112 | 48132723 |
| 349664 | Aug 3, 1988 | Aug 3, 1988 | Howell Petroleum Corporation | Pecos | Ogden Estate #3 | 6,000 | 37136111 |
| 340462 | Dec 23, 1987 | Dec 23, 1987 | Howell Petroleum Corporation | Pecos | Odgen Estate #3 | 5,100 | 37136031 |
| 339786 | Dec 8, 1987 | Dec 8, 1987 | Howell Petroleum Corporation | Yoakum | Walden, C. J. #1 | 12,500 | 50133310 |
| 339786Amendment | Dec 8, 1987 | Dec 8, 1987 | Howell Petroleum Corporation | Yoakum | Walden, C. J. #1 | 12,500 | 50133310 |
| 336347 | Sep 25, 1987 | Sep 25, 1987 | Howell Petroleum Corporation | Matagorda | Richers, Alfred B. #1 | 10,952 | 32130820 |
| 335901 | Sep 23, 1987 | Sep 23, 1987 | Howell Petroleum Corporation | Pecos | Ogden Estate #2 | 4,888 | 37131118 |
| 328393 | May 11, 1987 | May 11, 1987 | Howell Petroleum Corporation | Victoria | Zimmer #12 | 2,950 | 46932523 |
| 329197 | May 5, 1987 | May 5, 1987 | Howell Petroleum Corporation | Victoria | Zimmer, John #6 | 2,800 | 46901278 |
| 324386 | Dec 18, 1986 | Dec 18, 1986 | Howell Petroleum Corporation | Yoakum | Frost, J. W. #1 | 12,500 | 50133123 |
| 321563 | Oct 17, 1986 | Oct 17, 1986 | Howell Petroleum Corporation | Matagorda | Stewart Savage #1 | 9,990 | 32130883 |
| 292559 | Dec 12, 1985 | Dec 12, 1985 | Howell Petroleum Corporation | Victoria | Zimmer #6 | 2,800 | 46901278 |
| 292174 | Dec 10, 1985 | Dec 10, 1985 | Howell Petroleum Corporation | Matagorda | Cornelius #2 | 10,000 | 32131494 |
| 292177 | Dec 10, 1985 | Dec 10, 1985 | Howell Petroleum Corporation | Matagorda | Cornelius #3 | 10,000 | 32131495 |
| 275898 | May 21, 1985 | May 21, 1985 | Howell Petroleum Corporation | Jack | Pursley #2 | 6,000 | 23734409 |
| 266655 | Feb 11, 1985 | Feb 11, 1985 | Howell Petroleum Corporation | Victoria | Zimmer, John #5 | 2,819 | 46901273 |
| 265131 | Jan 25, 1985 | Jan 25, 1985 | Howell Petroleum Corporation | Matagorda | Copano-Braman #1 | 9,040 | 32101135 |
| 264832 | Jan 22, 1985 | Jan 22, 1985 | Howell Petroleum Corporation | Carson | Hill #5 | 3,500 | 06531831 |
| 260209 | Dec 4, 1984 | Dec 4, 1984 | Howell Petroleum Corporation | Pecos | Ogden Estate #3 | 6,000 | 37135211 |
| 256426 | Nov 2, 1984 | Nov 2, 1984 | Howell Petroleum Corporation | Lynn | Clem #1 | 11,000 | 30530328 |
| 254517 | Oct 10, 1984 | Oct 10, 1984 | Atapco | Lynn | Clem #1 | 11,000 | 30530328 |
| 246059 | Jul 25, 1984 | Jul 25, 1984 | Howell Petroleum Corporation | Carson | Hill #4 | 3,500 | 06531750 |
| 242148 | Jun 15, 1984 | Jun 15, 1984 | Howell Petroleum Corporation | Hutchinson | Weatherly "Fee" #2 | 3,400 | 23308461 |
| 240163 | May 24, 1984 | May 24, 1984 | Howell Petroleum Corporation | Victoria | Zimmer, John #11 | 5,000 | 46932243 |
| 220167 | Oct 28, 1983 | Oct 28, 1983 | Howell Petroleum Corporation | Matagorda | Braman, D. H. #3 | 10,500 | 32131347 |
| 192824 | Apr 28, 1983 | Apr 28, 1983 | Howell Petroleum Corporation | Pecos | Ogden Estate #3 | 5,300 | 37134326 |
| 179417 | Dec 9, 1982 | Dec 9, 1982 | Howell Petroleum Corporation | Jack | Tilghman, C. O. & A. #4 | 5,500 | 23734888 |
| 179143 | Dec 6, 1982 | Dec 6, 1982 | Howell Petroleum Corporation | Jack | Pursley, Jno. #4 | 5,000 | 23734876 |
| 179072 | Dec 1, 1982 | Dec 1, 1982 | Howell Petroleum Corporation | Calhoun | Kingswell-Smith, Baird #1 | 10,151 | 05731218 |
| 172100 | Sep 17, 1982 | Sep 17, 1982 | Howell Petroleum Corporation | Galveston | State Tract 347 #1 | 10,700 | 16730915 |
| 145033 | Dec 22, 1981 | Dec 22, 1981 | Howell Petroleum Corporation | Jack | Carpenter, Tom #1 | 5,881 | 23734259 |