| 486115 | Aug 4, 1999 | Aug 4, 1999 | Discovery Operating, Inc. | Schleicher | Ruth #3 | 7,100 | 41332068 |
| 485184 | Jun 24, 1999 | Jun 24, 1999 | Discovery Operating, Inc. | Schleicher | C.G.M. #2 | 7,200 | 41332064 |
| 485182 | Jun 22, 1999 | Jun 22, 1999 | Discovery Operating, Inc. | Schleicher | Lin H #2 | 7,300 | 41332065 |
| 485183 | Jun 16, 1999 | Jun 16, 1999 | Discovery Operating, Inc. | Schleicher | Roach B #3 | 7,100 | 41332063 |
| 485183Amendment | Jun 16, 1999 | Jun 16, 1999 | Discovery Operating, Inc. | Schleicher | Roach B #3 | 7,100 | 41332063 |
| 485018 | Jun 9, 1999 | Jun 9, 1999 | Discovery Operating, Inc. | Andrews | University 11A #2X | 8,200 | 00338491 |
| 484730 | May 27, 1999 | May 27, 1999 | Discovery Operating, Inc. | Upton | Firefly B #2 | 10,500 | 46133975 |
| 483937 | Apr 22, 1999 | Apr 22, 1999 | Discovery Operating, Inc. | Andrews | Andrews 1115 #3 | 8,200 | 00338479 |
| 483936 | Apr 22, 1999 | Apr 22, 1999 | Discovery Operating, Inc. | Andrews | University 11 #4 | 8,200 | 00338481 |
| 483935 | Apr 22, 1999 | Apr 22, 1999 | Discovery Operating, Inc. | Andrews | University 11 #3 | 8,200 | 00338480 |
| 481656 | Dec 28, 1998 | Dec 28, 1998 | Discovery Operating, Inc. | Upton | Firefly B #1 | 10,500 | 46133966 |
| 480906 | Nov 23, 1998 | Nov 23, 1998 | Discovery Operating, Inc. | Schleicher | Clyde #1 | 8,000 | 41332053 |
| 474678 | Mar 26, 1998 | Mar 26, 1998 | Discovery Operating, Inc. | Upton | Firefly A #1 | 10,500 | 46133928 |
| 474677 | Mar 26, 1998 | Mar 26, 1998 | Discovery Operating, Inc. | Lipscomb | Schultz #1 | 10,400 | 29532432 |
| 474677Amendment | Mar 26, 1998 | Mar 26, 1998 | Discovery Operating, Inc. | Lipscomb | Schultz #1 | 10,400 | 29532432 |
| 467600 | Sep 22, 1997 | Sep 22, 1997 | Discovery Operating, Inc. | Upton | Glowbug #1 | 11,300 | 46133860 |
| 466335 | Aug 19, 1997 | Aug 19, 1997 | Discovery Operating, Inc. | Andrews | University 11 #1 | 8,340 | 00332232 |
| 466092 | Aug 14, 1997 | Aug 14, 1997 | Discovery Operating, Inc. | Upton | Firefly #1 | 11,300 | 46133831 |
| 463929 | Jun 23, 1997 | Jun 23, 1997 | Discovery Operating, Inc. | Andrews | University 11 A #2 | 8,200 | 00338236 |
| 462435 | May 20, 1997 | May 20, 1997 | Discovery Operating, Inc. | Andrews | Andrews 1115 #2 | 8,200 | 00338211 |
| 461550 | Apr 29, 1997 | Apr 29, 1997 | Discovery Operating, Inc. | Schleicher | Henderson, R. L. #1Y | 7,500 | 41331993 |
| 456280 | Mar 6, 1997 | Mar 6, 1997 | Discovery Operating, Inc. | Hansford | O'Loughlin, Jr. A #1 | 7,500 | 19531286 |
| 456083 | Feb 20, 1997 | Feb 20, 1997 | Discovery Operating, Inc. | Hansford | O'Loughlin Sr. Trust #5 | 8,500 | 19531284 |
| 455785 | Dec 4, 1996 | Dec 4, 1996 | Discovery Operating, Inc. | Andrews | University 11 #2 | 8,200 | 00338097 |
| 449299 | Jun 19, 1996 | Jun 19, 1996 | Discovery Operating, Inc. | Schleicher | Case A #1 | 7,200 | 41331974 |
| 448212 | Jun 13, 1996 | Jun 13, 1996 | Discovery Operating, Inc. | Schleicher | Fifty One #2 | 7,100 | 41331971 |
| 448212Amendment | Jun 13, 1996 | Jun 13, 1996 | Discovery Operating, Inc. | Schleicher | Fifty One #2 | 7,100 | 41331971 |
| 448573 | Jun 3, 1996 | Jun 3, 1996 | Discovery Operating, Inc. | Schleicher | Bar A #1 | 7,200 | 41331973 |
| 448426 | May 29, 1996 | May 29, 1996 | Discovery Operating, Inc. | Schleicher | Ruth C #1 | 7,200 | 41331972 |
| 439216 | Mar 5, 1996 | Mar 5, 1996 | Discovery Operating, Inc. | Hansford | Vanderburg B #1 | 7,100 | 19531234 |
| 438395 | Aug 24, 1995 | Aug 24, 1995 | Discovery Operating, Inc. | Schleicher | Fifty - One #1 | 7,100 | 41331946 |
| 438352 | Aug 24, 1995 | Aug 24, 1995 | Discovery Operating, Inc. | Schleicher | R.L. "1193" #1 | 7,500 | 41331945 |
| 438352Amendment | Aug 24, 1995 | Aug 24, 1995 | Discovery Operating, Inc. | Schleicher | R.L. "1193" #1 | 6,681 | 41331945 |
| 438151 | Jul 25, 1995 | Jul 25, 1995 | Discovery Operating, Inc. | Schleicher | State University "FO" #3 | 8,000 | 41331944 |
| 435227 | May 2, 1995 | May 2, 1995 | Discovery Operating, Inc. | Andrews | Andrews 3 #2 | 8,200 | 00337638 |
| 427488 | Sep 29, 1994 | Sep 29, 1994 | Discovery Operating, Inc. | Schleicher | Roach B #2 | 7,100 | 41331901 |
| 426334 | Jul 28, 1994 | Jul 28, 1994 | Discovery Operating, Inc. | Andrews | University 11 B #2 | 7,500 | 00332378 |
| 425202 | Jun 24, 1994 | Jun 24, 1994 | Discovery Operating, Inc. | Andrews | Andrews "3" #1 | 7,900 | 00337301 |
| 416496 | Oct 21, 1993 | Oct 21, 1993 | Discovery Operating, Inc. | Schleicher | State University FQ #3 | 8,100 | 41331858 |
| 416514 | Oct 1, 1993 | Oct 1, 1993 | Discovery Operating, Inc. | Schleicher | State University ES #2 | 8,100 | 41331859 |
| 414261 | Jul 29, 1993 | Jul 29, 1993 | Discovery Operating, Inc. | Andrews | Andrews "3" #1 | 8,200 | 00337301 |
| 413398 | Jul 5, 1993 | Jul 5, 1993 | Discovery Operating, Inc. | Andrews | Andrews 1115 #1 | 8,200 | 00337277 |
| 412653 | Jun 14, 1993 | Jun 14, 1993 | Discovery Operating, Inc. | Menard | Neel #1 | 2,200 | 32730775 |
| 410620 | May 11, 1993 | May 11, 1993 | Discovery Operating, Inc. | Andrews | University 11 B #1 #1 | 7,900 | 00332390 |
| 406443 | Dec 1, 1992 | Dec 1, 1992 | Discovery Operating, Inc. | Schleicher | Fortune "7" #1 | 8,100 | 41331834 |
| 405481 | Nov 18, 1992 | Nov 18, 1992 | Discovery Operating, Inc. | Schleicher | Deal #2 #2 | 7,500 | 41331827 |
| 405058 | Oct 28, 1992 | Oct 28, 1992 | Discovery Operating, Inc. | Schleicher | Otis #1 | 7,400 | 41331825 |
| 405058Amendment | Oct 28, 1992 | Oct 28, 1992 | Discovery Operating, Inc. | Schleicher | Otis #1 | 7,163 | 41331825 |
| 405057 | Oct 27, 1992 | Oct 27, 1992 | Discovery Operating, Inc. | Schleicher | Lin CY #1 | 7,400 | 41331824 |
| 405057Amendment | Oct 27, 1992 | Oct 27, 1992 | Discovery Operating, Inc. | Schleicher | Lin CY #1 | 7,400 | 41331824 |
| 404137 | Oct 9, 1992 | Oct 9, 1992 | Discovery Operating, Inc. | Irion | University "6" #1 | 8,843 | 23532360 |
| 402434 | Sep 1, 1992 | Sep 1, 1992 | Discovery Operating, Inc. | Schleicher | Lin AY #1 | 7,300 | 41331810 |
| 402433 | Sep 1, 1992 | Sep 1, 1992 | Discovery Operating, Inc. | Schleicher | Lin L #1 | 7,300 | 41331809 |
| 402394 | Sep 1, 1992 | Sep 1, 1992 | Discovery Operating, Inc. | Schleicher | Lin AZ #1 | 7,300 | 41331811 |
| 401944 | Aug 10, 1992 | Aug 10, 1992 | Discovery Operating, Inc. | Schleicher | State University "FQ" #2 | 8,200 | 41331806 |
| 401179 | Jul 14, 1992 | Jul 14, 1992 | Discovery Operating, Inc. | Schleicher | Case-Meador #1 | 7,200 | 41331799 |
| 399821 | Jun 4, 1992 | Jun 4, 1992 | Discovery Operating, Inc. | Hansford | Knutson #1 | 8,500 | 19531160 |
| 397048 | Mar 9, 1992 | Mar 9, 1992 | Discovery Operating, Inc. | Schleicher | State "UF" #2 | 8,100 | 41331782 |
| 397027 | Mar 4, 1992 | Mar 4, 1992 | Discovery Operating, Inc. | Schleicher | State "UO" - a #1 #1 | 8,100 | 41331783 |
| 396932 | Feb 26, 1992 | Feb 26, 1992 | Discovery Operating, Inc. | Schleicher | University FO #2 | 8,000 | 41331781 |
| 392933 | Nov 4, 1991 | Nov 4, 1991 | Discovery Operating, Inc. | Schleicher | State "TB" #3 | 8,100 | 41331773 |
| 392932 | Oct 28, 1991 | Oct 28, 1991 | Discovery Operating, Inc. | Schleicher | State "TB" #2 | 8,100 | 41331770 |
| 388830 | Jun 10, 1991 | Jun 10, 1991 | Discovery Operating, Inc. | Hansford | Chamberlain #1 | 8,500 | 19531131 |
| 375138 | Jul 3, 1990 | Jul 3, 1990 | Discovery Operating, Inc. | Schleicher | Roach B #1 | 7,100 | 41331733 |
| 375137 | Jul 3, 1990 | Jul 3, 1990 | Discovery Operating, Inc. | Schleicher | Ruth #2 | 7,100 | 41331732 |
| 374237 | Jun 12, 1990 | Jun 12, 1990 | Discovery Operating, Inc. | Schleicher | Lin "K" #1 | 7,400 | 41331729 |
| 365968 | Nov 15, 1989 | Nov 15, 1989 | Discovery Operating, Inc. | Schleicher | Lin "J" #1 | 7,900 | 41300379 |
| 360326 | Jun 13, 1989 | Jun 13, 1989 | Discovery Operating, Inc. | Schleicher | Cahill #1 | 5,000 | 41331707 |
| 359674 | May 26, 1989 | May 26, 1989 | Discovery Operating, Inc. | Schleicher | Bar #1 | 7,000 | 41330891 |
| 359249 | May 15, 1989 | May 15, 1989 | Discovery Operating, Inc. | Schleicher | Lin "B" #1 | 7,090 | 41330880 |
| 356005 | Feb 21, 1989 | Feb 21, 1989 | Discovery Operating, Inc. | Schleicher | Lin "I" #1 | 7,300 | 41331701 |
| 344916 | Apr 12, 1988 | Apr 12, 1988 | Discovery Operating, Inc. | Schleicher | Lin "H" #1 | 7,300 | 41331679 |
| 343971 | Mar 17, 1988 | Mar 17, 1988 | Discovery Operating, Inc. | Martin | MGF-Smith "A" #1 | 8,560 | 31732675 |
| 327399 | Mar 5, 1987 | Mar 5, 1987 | Discovery Operating, Inc. | Schleicher | Meador #1 | 7,000 | 41331621 |
| 324982 | Jan 12, 1987 | Jan 12, 1987 | Discovery Operating, Inc. | Reagan | Hickman #2 | 6,300 | 38311402 |
| 324072 | Dec 9, 1986 | Dec 9, 1986 | Discovery Operating, Inc. | Martin | Smith #1 | 4,600 | 31733404 |
| 299903 | Mar 19, 1986 | Mar 19, 1986 | Discovery Operating, Inc. | Reagan | Arco Sugg #1 | 7,500 | 38333751 |
| 292468 | Dec 4, 1985 | Dec 4, 1985 | Discovery Operating, Inc. | Runnels | Richards "A" #1 | 6,000 | 39933664 |
| 291380 | Nov 27, 1985 | Nov 27, 1985 | Discovery Operating, Inc. | Runnels | Richards #1 | 6,000 | 39933647 |
| 291234 | Nov 26, 1985 | Nov 26, 1985 | Discovery Operating, Inc. | Martin | Glass "3-A" #1 | 10,500 | 31733294 |
| 291238 | Nov 26, 1985 | Nov 26, 1985 | Discovery Operating, Inc. | Tom Green | Jack #1 | 7,500 | 45131663 |
| 288228 | Oct 22, 1985 | Oct 22, 1985 | Discovery Operating, Inc. | Midland | Sweet Pea #1 | 10,000 | 32931614 |
| 274057 | May 6, 1985 | May 6, 1985 | Discovery Operating, Inc. | Reagan | Sugg #1 | 8,600 | 38333437 |
| 274058 | May 6, 1985 | May 6, 1985 | Discovery Operating, Inc. | Reagan | Sugg "A" #1 | 8,600 | 38333438 |
| 272280 | Apr 12, 1985 | Apr 12, 1985 | Discovery Operating, Inc. | Dawson | O'Brien #1 | 9,300 | 11532193 |
| 271533 | Apr 8, 1985 | Apr 8, 1985 | Discovery Operating, Inc. | Martin | Glass "3" #1 | 10,500 | 31733156 |
| 266406 | Feb 8, 1985 | Feb 8, 1985 | Discovery Operating, Inc. | Martin | Meringue "A" #1 | 11,200 | 31733134 |
| 264056 | Dec 31, 1984 | Dec 31, 1984 | Discovery Operating, Inc. | Midland | Sweetie Pie #1 | 9,500 | 32931479 |
| 257027 | Nov 6, 1984 | Nov 6, 1984 | Discovery Operating, Inc. | Hockley | Cook #1 | 7,400 | 21934577 |
| 253625 | Oct 5, 1984 | Oct 5, 1984 | Discovery Operating, Inc. | Coleman | Freeland #3 | 3,000 | 08334234 |
| 253659 | Oct 5, 1984 | Oct 5, 1984 | Discovery Operating, Inc. | Martin | MGF-Smith "D" #1 | 8,800 | 31733024 |
| 251910 | Sep 20, 1984 | Sep 20, 1984 | Discovery Operating, Inc. | Reagan | Hickman #10 | 7,300 | 38333209 |
| 252269 | Sep 20, 1984 | Sep 20, 1984 | Discovery Operating, Inc. | Hockley | Hood #1 | 7,400 | 21934492 |
| 251029 | Sep 10, 1984 | Sep 10, 1984 | Discovery Operating, Inc. | Reagan | Loftin #9 | 7,800 | 38333192 |
| 251027 | Sep 10, 1984 | Sep 10, 1984 | Discovery Operating, Inc. | Reagan | Loftin "A" #4 | 7,900 | 38333191 |
| 246741 | Jul 25, 1984 | Jul 25, 1984 | Discovery Operating, Inc. | Midland | Ramcon #2 | 11,900 | 32931271 |
| 243272 | Jun 27, 1984 | Jun 27, 1984 | Discovery Operating, Inc. | Midland | Hofferkamp "D" #2 | 9,800 | 32931350 |
| 243270 | Jun 27, 1984 | Jun 27, 1984 | Discovery Operating, Inc. | Midland | Hofferkamp "D" #1 | 9,800 | 32931349 |
| 238173 | May 9, 1984 | May 9, 1984 | Discovery Operating, Inc. | Midland | Wimberley "C" #1 | 9,800 | 32931330 |
| 238175 | May 9, 1984 | May 9, 1984 | Discovery Operating, Inc. | Midland | Wimberley "B" #1 | 9,800 | 32931331 |