| 450435 | Aug 9, 1996 | Aug 9, 1996 | Columbia Gas Development Corp. | Matagorda | Batchelder et Al #1 | 9,999 | 32131632 |
| 436127 | May 24, 1995 | May 24, 1995 | Columbia Gas Development Corp. | Zavala | Pickens Ranch #5 | 5,500 | 50732515 |
| 433038 | Feb 21, 1995 | Feb 21, 1995 | Columbia Gas Development Corp. | Cherokee | Opal #1 | 10,500 | 07330849 |
| 430397 | Nov 30, 1994 | Nov 30, 1994 | Columbia Gas Development Corp. | Tyler | Arco Fee LJ #3 | 8,000 | 45730492 |
| 425987 | Jul 19, 1994 | Jul 19, 1994 | Columbia Gas Development Corp. | Tyler | Arco Fee LJ #2 | 8,000 | 45730485 |
| 425692 | Jul 12, 1994 | Jul 12, 1994 | Columbia Gas Development Corp. | Victoria | Gillar #1 | 7,300 | 46933047 |
| 425021 | Jun 22, 1994 | Jun 22, 1994 | Columbia Gas Development Corp. | Colorado | Columbus State Bank-Sealy #1 | 12,500 | 08931904 |
| 424427 | Jun 8, 1994 | Jun 8, 1994 | Columbia Gas Development Corp. | Terry | Oliver #8801 | 12,000 | 44531702 |
| 422941 | Apr 14, 1994 | Apr 14, 1994 | Columbia Gas Development Corp. | Brazoria | I.P. Farms et Al #1 | 9,700 | 03932521 |
| 422149 | Mar 18, 1994 | Mar 18, 1994 | Columbia Gas Development Corp. | Duval | State - Allen/Rowden #1 | 13,500 | 13137927 |
| 416856 | Oct 8, 1993 | Oct 8, 1993 | Columbia Gas Development Corp. | Tyler | Arco Fee LJ #1 | 8,700 | 45730471 |
| 414703 | Aug 10, 1993 | Aug 10, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #2 | 9,225 | 24130530 |
| 413212 | Jun 29, 1993 | Jun 29, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #4 | 10,200 | 24130543 |
| 413211 | Jun 29, 1993 | Jun 29, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #3 | 10,200 | 24130544 |
| 413211Amendment | Jun 29, 1993 | Jun 29, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #3 | 9,200 | 24130544 |
| 412896 | Jun 17, 1993 | Jun 17, 1993 | Columbia Gas Development Corp. | Jasper | Walters, James R. et Al #1 | 8,500 | 24130541 |
| 409400 | Mar 3, 1993 | Mar 3, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #2 | 10,200 | 24130530 |
| 409400Amendment | Mar 3, 1993 | Mar 3, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #2 | 10,200 | 24130530 |
| 409400Amendment | Mar 3, 1993 | Mar 3, 1993 | Columbia Gas Development Corp. | Jasper | Arco Fee #2 | 10,200 | 24130530 |
| 404073 | Oct 27, 1992 | Oct 27, 1992 | Columbia Gas Development Corp. | Brazoria | Smith, Jesse L. #1 | 11,600 | 03932476 |
| 404715 | Oct 22, 1992 | Oct 22, 1992 | Columbia Gas Development Corp. | Jasper | Arco Fee #1 | 10,800 | 24130519 |
| 403437 | Sep 17, 1992 | Sep 17, 1992 | Columbia Gas Development Corp. | Anderson | Davey-Royall #1 | 6,000 | 00132167 |
| 401511 | Jul 23, 1992 | Jul 23, 1992 | Columbia Gas Development Corp. | Anderson | Temple-Inland #2 | 6,300 | 00132119 |
| 401472 | Jul 22, 1992 | Jul 22, 1992 | Columbia Gas Development Corp. | Anderson | Sawyer, Eula P. #1 | 6,500 | 00132118 |
| 400871 | Jul 13, 1992 | Jul 13, 1992 | Columbia Gas Development Corp. | Brazoria | Weaver, M. M. #1 | 10,200 | 03932467 |
| 398408 | Apr 17, 1992 | Apr 17, 1992 | Columbia Gas Development Corp. | Anderson | Davenport, Henry S. Jr. #1 | 6,000 | 00132103 |
| 398408Amendment | Apr 17, 1992 | Apr 17, 1992 | Columbia Gas Development Corp. | Anderson | Temple-Inland #A 1 | 6,000 | 00132103 |
| 398018 | Apr 6, 1992 | Apr 6, 1992 | Columbia Gas Development Corp. | Lavaca | Schilhab #3 | 7,500 | 28532138 |
| 394404 | Dec 2, 1991 | Dec 2, 1991 | Columbia Gas Development Corp. | Garza | Rodgers Ranch #1 | 9,500 | 16933081 |
| 393757 | Nov 20, 1991 | Nov 20, 1991 | Columbia Gas Development Corp. | Anderson | Temple-Inland #1 | 6,000 | 00132072 |
| 389734 | Jul 15, 1991 | Jul 15, 1991 | Columbia Gas Development Corp. | Lavaca | Schilhab #2 | 7,500 | 28532117 |
| 389734Amendment | Jul 15, 1991 | Jul 15, 1991 | Columbia Gas Development Corp. | Lavaca | Schilhab, C. W. et Al #2 | 7,600 | 28532117 |
| 387801 | Jun 6, 1991 | Jun 6, 1991 | Columbia Gas Development Corp. | Navarro | Reynolds Drlg Co.-Warren #1 | 11,300 | 34934411 |
| 385088 | Apr 25, 1991 | Apr 25, 1991 | Columbia Gas Development Corp. | Matagorda | Kelly, D. R. #1 #1 | 11,500 | 32131650 |
| 385276 | Mar 7, 1991 | Mar 7, 1991 | Columbia Gas Development Corp. | Live Oak | T. B. Justice Est. #1 | 13,800 | 29733980 |
| 381958 | Dec 12, 1990 | Dec 12, 1990 | Columbia Gas Development Corp. | Gaines | Morrison #1 | 12,000 | 16534121 |
| 380257 | Nov 2, 1990 | Nov 2, 1990 | Columbia Gas Development Corp. | Lavaca | Schilhab #1 | 7,050 | 28532089 |
| 380026 | Oct 26, 1990 | Oct 26, 1990 | Columbia Gas Development Corp. | Duval | Lincoln Natl Bank, et Al #1 | 15,000 | 13137418 |
| 376627 | Aug 21, 1990 | Aug 21, 1990 | Columbia Gas Development Corp. | Matagorda | Batchelder et Al #1 | 14,500 | 32131632 |
| 376715 | Aug 20, 1990 | Aug 20, 1990 | Columbia Gas Development Corp. | Yoakum | Cleveland #16432C | 12,000 | 50133594 |
| 375527 | Jul 17, 1990 | Jul 17, 1990 | Columbia Gas Development Corp. | Jackson | Drushel, William H. Jr. #1 | 9,000 | 23932551 |
| 371801 | Apr 12, 1990 | Apr 12, 1990 | Columbia Gas Development Corp. | Grimes | Union Fee #1 | 14,500 | 18530423 |
| 371199 | Mar 22, 1990 | Mar 22, 1990 | Columbia Gas Development Corp. | Lee | McHenry #2 | 8,700 | 28732275 |
| 368815 | Jan 19, 1990 | Jan 19, 1990 | Columbia Gas Development Corp. | Harrison | Ware, W. T. #1 | 7,500 | 20331876 |
| 367650 | Dec 15, 1989 | Dec 15, 1989 | Columbia Gas Development Corp. | Lee | McHenry #1 | 10,500 | 28732268 |
| 366989 | Nov 29, 1989 | Nov 29, 1989 | Columbia Gas Development Corp. | Gaines | Morrison #1 | 13,500 | 16534121 |
| 364103 | Sep 20, 1989 | Sep 20, 1989 | Columbia Gas Development Corp. | Garza | Resource #1 | 8,200 | 16932944 |
| 360723 | Jun 28, 1989 | Jun 28, 1989 | Columbia Gas Development Corp. | Galveston | Halls Bayou Ranch #1 | 10,500 | 16731168 |
| 357824 | Apr 10, 1989 | Apr 10, 1989 | Columbia Gas Development Corp. | Bee | McConnell, et Al #1 | 5,900 | 02532516 |
| 353326 | Nov 16, 1988 | Nov 16, 1988 | Columbia Gas Development Corp. | Colorado | Cgdc American Cometra Longan #1 | 12,200 | 08931752 |
| 351692 | Sep 30, 1988 | Sep 30, 1988 | Columbia Gas Development Corp. | Terry | Betzz #1 | 11,900 | 44531533 |
| 350770 | Sep 2, 1988 | Sep 2, 1988 | Columbia Gas Development Corp. | Howard | Middleton "A" #1 | 8,715 | 22734380 |
| 350212 | Aug 16, 1988 | Aug 16, 1988 | Columbia Gas Development Corp. | Hockley | Hartmangruber #1501 | 4,900 | 21935338 |
| 348801 | Jul 12, 1988 | Jul 12, 1988 | Columbia Gas Development Corp. | Burleson | Cgdc Sebesta #2 | 8,650 | 05133005 |
| 346095 | May 5, 1988 | May 5, 1988 | Columbia Gas Development Corp. | Stonewall | Helms #1 | 7,000 | 43332393 |
| 329280 | Apr 24, 1987 | Apr 24, 1987 | Columbia Gas Development Corp. | Zapata | Gonzalez, L. et Al. #1 | 8,500 | 50532314 |
| 327755 | Mar 25, 1987 | Mar 25, 1987 | Columbia Gas Development Corp. | Calhoun | R. W. Sanders Unit #1 | 8,800 | 05731374 |
| 327755Amendment | Mar 25, 1987 | Mar 25, 1987 | Columbia Gas Development Corp. | Calhoun | R. W. Sanders Unit #1 | 8,800 | 05731374 |
| 327754 | Mar 20, 1987 | Mar 20, 1987 | Columbia Gas Development Corp. | Calhoun | Cliburn Ranch #1 | 8,750 | 05731337 |
| 322569 | Nov 3, 1986 | Nov 3, 1986 | Columbia Gas Development Corp. | Howard | Wright Ranch #1 | 9,100 | 22734084 |
| 303508 | Jun 23, 1986 | Jun 23, 1986 | Columbia Gas Development Corp. | Brazoria | Sun Fee Unit #1 | 7,900 | 03932144 |
| 295699 | Jan 20, 1986 | Jan 20, 1986 | Columbia Gas Development Corp. | Nolan | Tupco/Bishop #1 | 7,200 | 35331927 |
| 293530 | Dec 23, 1985 | Dec 23, 1985 | Columbia Gas Development Corp. | Dawson | Tupco/Miller #1 | 12,300 | 11532334 |
| 283244 | Aug 22, 1985 | Aug 22, 1985 | Columbia Gas Development Corp. | Colorado | Irma Dahse Unit #1 | 10,500 | 08931611 |
| 282632 | Aug 14, 1985 | Aug 14, 1985 | Columbia Gas Development Corp. | Burleson | Jeffery, R. W. et UX #4 | 8,400 | 05132879 |
| 276821 | May 31, 1985 | May 31, 1985 | Columbia Gas Development Corp. | Galveston | Pathfinder Investments Unit #2 | 12,500 | 16731062 |
| 275275 | May 17, 1985 | May 17, 1985 | Columbia Gas Development Corp. | Calhoun | Cliburn Ranch #2 | 11,000 | 05731380 |
| 274743 | May 9, 1985 | May 9, 1985 | Columbia Gas Development Corp. | Calhoun | Welder Ranch Unit #1 | 12,000 | 05731377 |
| 272187 | Apr 12, 1985 | Apr 12, 1985 | Columbia Gas Development Corp. | Calhoun | R. W. Sanders Unit #1 | 10,275 | 05731374 |
| 261938 | Dec 21, 1984 | Dec 21, 1984 | Columbia Gas Development Corp. | Tyler | J. David Unit #1 | 12,000 | 45730370 |
| 260780 | Dec 12, 1984 | Dec 12, 1984 | Columbia Gas Development Corp. | Jefferson | Credo/Wilber, C. E. Estate #1 | 14,000 | 24531824 |
| 249891 | Aug 29, 1984 | Aug 29, 1984 | Columbia Gas Development Corp. | Calhoun | Cliburn Ranch #1 | 11,000 | 05731337 |
| 248998 | Aug 21, 1984 | Aug 21, 1984 | Columbia Gas Development Corp. | Galveston | Pathfinder Investments #1 | 13,000 | 16731013 |
| 248409 | Aug 15, 1984 | Aug 15, 1984 | Columbia Gas Development Corp. | Duval | Lopez, Jesus Jr., et Al #1 | 8,000 | 13136522 |
| 227464Amendment | Jan 24, 1984 | Jan 24, 1984 | Columbia Gas Development Corp. | Burleson | Laffere, Marvin #1 | 8,000 | 05132626 |
| 236319 | Dec 5, 1983 | Dec 5, 1983 | Columbia Gas Development Corp. | Lee | Bowers, J. A. Estate #2 | 9,000 | 28731609 |
| 223823 | Oct 17, 1983 | Oct 17, 1983 | Columbia Gas Development Corp. | Brazoria | Murray, Lula P. Estate #1 | 15,500 | 03931922 |
| 209346 | Sep 2, 1983 | Sep 2, 1983 | Columbia Gas Development Corp. | Brazoria | Lula P. Murray Estate Unit #1 | 15,500 | 03931922 |
| 205318 | Aug 8, 1983 | Aug 8, 1983 | Columbia Gas Development Corp. | Burleson | Calvin Kocurek et al Unit #1 | 8,105 | 05130548 |
| 191296 | Apr 12, 1983 | Apr 12, 1983 | Columbia Gas Development Corp. | Lee | Ira J. Lehmann Unit #1 | 8,499 | 28730935 |
| 188036 | Mar 9, 1983 | Mar 9, 1983 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frank #6 | 7,990 | 28731064 |
| 163073 | Jun 4, 1982 | Jun 4, 1982 | Columbia Gas Development Corp. | Burleson | Tyson, Scott #4 | 8,500 | 05132272 |
| 161059 | May 18, 1982 | May 18, 1982 | Columbia Gas Development Corp. | Burleson | Raymond Zgabay Unit #4 | 8,050 | 05132251 |
| 163094 | May 6, 1982 | May 6, 1982 | Columbia Gas Development Corp. | Burleson | Dickens, Raymond Jr. #1 | 11,000 | 05131773 |
| 156668 | Apr 8, 1982 | Apr 8, 1982 | Columbia Gas Development Corp. | Burleson | Columbus Professional Bldgs Inc. #3 | 8,500 | 05132211 |
| 154899 | Mar 12, 1982 | Mar 12, 1982 | Columbia Gas Development Corp. | Burleson | Zgabay, Raymond #3 | 8,400 | 05132202 |
| 154597 | Feb 25, 1982 | Feb 25, 1982 | Columbia Gas Development Corp. | Lee | Zgabay, Edwin #6 | 8,200 | 28731209 |
| 151141 | Feb 11, 1982 | Feb 11, 1982 | Columbia Gas Development Corp. | Burleson | Kristof, Frank Unit #1 | 8,100 | 05132098 |
| 147754 | Dec 29, 1981 | Dec 29, 1981 | Columbia Gas Development Corp. | Burleson | J.K. Pearce Unit #2 | 8,200 | 05132086 |
| 146293 | Nov 4, 1981 | Nov 4, 1981 | Columbia Gas Development Corp. | Burleson | Marion J. Filippone Fee #6 | 8,400 | 05131876 |
| 137341 | Oct 20, 1981 | Oct 20, 1981 | Columbia Gas Development Corp. | Burleson | Alvin Kucera Unit #1 | 8,200 | 05131938 |
| 135733 | Oct 7, 1981 | Oct 7, 1981 | Columbia Gas Development Corp. | Lee | Bowers, Linden & Frank #6 | 8,200 | 28731064 |
| 134574 | Sep 25, 1981 | Sep 25, 1981 | Columbia Gas Development Corp. | Lee | Kunkel, O.W. Unit #1 | 9,900 | 28731057 |
| 134551 | Sep 11, 1981 | Sep 11, 1981 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. Fee #5 | 8,400 | 05131846 |
| 129578 | Aug 11, 1981 | Aug 11, 1981 | Columbia Gas Development Corp. | Burleson | Filippone, Marion J. Fee #7 | 8,200 | 05131809 |
| 128323 | Aug 3, 1981 | Aug 3, 1981 | Columbia Gas Development Corp. | Burleson | Dickens, Raymond Jr. #1 | 11,000 | 05131773 |
| 126786 | Jul 24, 1981 | Jul 24, 1981 | Columbia Gas Development Corp. | Burleson | Schoppe, Emily K. Unit #1 | 8,800 | 05131749 |
| 126759 | Jul 24, 1981 | Jul 24, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #3 | 9,600 | 28731012 |
| 126752 | Jul 24, 1981 | Jul 24, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #4 | 9,900 | 28731011 |
| 121830 | Jun 12, 1981 | Jun 12, 1981 | Columbia Gas Development Corp. | Lee | Lehmann, Ira J. Unit #2 | 9,900 | 28730975 |