| 490987 | Feb 14, 2000 | Feb 14, 2000 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #18 | 3,300 | 22702300 |
| 490247 | Dec 17, 1999 | Dec 17, 1999 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #16 | 3,300 | 22702299 |
| 489648 | Dec 3, 1999 | Dec 3, 1999 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #5 | 3,300 | 22702292 |
| 487110 | Nov 17, 1999 | Nov 17, 1999 | Vista Resources, Inc. (A) | Howard | Clay #14 | 3,300 | 22702297 |
| 488196 | Oct 14, 1999 | Oct 14, 1999 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #7 | 3,300 | 22702294 |
| 487030 | Sep 24, 1999 | Sep 24, 1999 | Vista Resources, Inc. (A) | Pecos | Blackstone Slaughter "25" #1 | 11,000 | 37136936 |
| 487594 | Sep 22, 1999 | Sep 22, 1999 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #9W | 3,300 | 22733910 |
| 487312 | Sep 13, 1999 | Sep 13, 1999 | Vista Resources, Inc. (A) | Ward | State "XA" #2 | 7,900 | 47534611 |
| 487193 | Sep 10, 1999 | Sep 10, 1999 | Vista Resources, Inc. (A) | Ward | State "OB" #7 | 7,900 | 47534609 |
| 487163 | Sep 8, 1999 | Sep 8, 1999 | Vista Resources, Inc. (A) | Winkler | University "38" #5 | 7,900 | 49532767 |
| 486425 | Sep 2, 1999 | Sep 2, 1999 | Vista Resources, Inc. (A) | Howard | Roberts, Dora -E- #7 | 2,900 | 22735357 |
| 487123 | Aug 31, 1999 | Aug 31, 1999 | Vista Resources, Inc. (A) | Winkler | University "38" #6 | 7,900 | 49532766 |
| 487049 | Aug 31, 1999 | Aug 31, 1999 | Vista Resources, Inc. (A) | Andrews | Littman, Simon -7- #703 | 8,000 | 00338520 |
| 486161 | Jul 27, 1999 | Jul 27, 1999 | Vista Resources, Inc. (A) | Howard | Roberts, Dora -E- #5 | 2,900 | 22730854 |
| 484918 | Jun 21, 1999 | Jun 21, 1999 | Vista Resources, Inc. (A) | Howard | Chalk "A" #4 | 3,500 | 22702282 |
| 484194 | May 5, 1999 | May 5, 1999 | Vista Resources, Inc. (A) | Reagan | Sugg, C "47" #1H | 9,470 | 38334708 |
| 484154 | Apr 29, 1999 | Apr 29, 1999 | Vista Resources, Inc. (A) | Ward | University 8 #6 | 7,300 | 47534596 |
| 484147 | Apr 29, 1999 | Apr 29, 1999 | Vista Resources, Inc. (A) | Winkler | University "38" #4 | 7,300 | 49532751 |
| 484147Amendment | Apr 29, 1999 | Apr 29, 1999 | Vista Resources, Inc. (A) | Winkler | University "38" #4 | 7,900 | 49532751 |
| 483856 | Apr 19, 1999 | Apr 19, 1999 | Vista Resources, Inc. (A) | Howard | Chalk A #18 | 3,300 | 22735330 |
| 483856Amendment | Apr 19, 1999 | Apr 19, 1999 | Vista Resources, Inc. (A) | Howard | Chalk A #18 | 3,300 | 22735330 |
| 482268 | Feb 26, 1999 | Feb 26, 1999 | Vista Resources, Inc. (A) | Jackson | Peters #3 | 6,032 | 23900719 |
| 482239 | Jan 27, 1999 | Jan 27, 1999 | Vista Resources, Inc. (A) | Yoakum | Webb "X" #1 | 11,402 | 50131666 |
| 481689 | Jan 25, 1999 | Jan 25, 1999 | Vista Resources, Inc. (A) | Pecos | La Escalera 75 #1 | 7,612 | 37136599 |
| 481688 | Jan 25, 1999 | Jan 25, 1999 | Vista Resources, Inc. (A) | Pecos | La Escalera Ltd II 73-A #1 | 8,000 | 37136545 |
| 481089 | Jan 13, 1999 | Jan 13, 1999 | Vista Resources, Inc. (A) | Reagan | Universtiy 1324 #6 | 7,900 | 38334881 |
| 481402Amendment | Dec 28, 1998 | Dec 28, 1998 | Vista Resources, Inc. (A) | Terrell | Noelke #1 | 10,300 | 44330025 |
| 481355 | Dec 10, 1998 | Dec 10, 1998 | Vista Resources, Inc. (A) | Howard | Chalk -A- #8 | 3,500 | 22702501 |
| 480812 | Nov 20, 1998 | Nov 20, 1998 | Vista Resources, Inc. (A) | Howard | Chalk, Otis "EO" #1W | 3,000 | 22735322 |
| 480811 | Nov 18, 1998 | Nov 18, 1998 | Vista Resources, Inc. (A) | Howard | Chalk -A- #14 | 3,500 | 22710952 |
| 480811Amendment | Nov 18, 1998 | Nov 18, 1998 | Vista Resources, Inc. (A) | Howard | Chalk, Otis -A- #14 | 3,500 | 22710952 |
| 480005 | Oct 13, 1998 | Oct 13, 1998 | Vista Resources, Inc. (A) | Ward | State "OC" #3 | 8,000 | 47534581 |
| 480004 | Oct 12, 1998 | Oct 12, 1998 | Vista Resources, Inc. (A) | Andrews | Littman, Simon -7- #702 | 7,900 | 00338453 |
| 475815 | May 5, 1998 | May 5, 1998 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #3W | 3,500 | 22730056 |
| 475489 | Apr 24, 1998 | Apr 24, 1998 | Vista Resources, Inc. (A) | Howard | Clay #4 | 4,000 | 22702291 |
| 474844 | Apr 1, 1998 | Apr 1, 1998 | Vista Resources, Inc. (A) | Howard | Chalk, G. O. #27 | 4,000 | 22735309 |
| 474195 | Mar 18, 1998 | Mar 18, 1998 | Vista Resources, Inc. (A) | Austin | Hillboldt #2 | 4,000 | 01530709 |
| 473463 | Feb 24, 1998 | Feb 24, 1998 | Vista Resources, Inc. (A) | Howard | Chalk, E. O. #6 | 3,200 | 22733547 |
| 472824 | Feb 4, 1998 | Feb 4, 1998 | Vista Resources, Inc. (A) | Howard | Chalk, G. O. #26 | 3,000 | 22730381 |
| 472002 | Jan 16, 1998 | Jan 16, 1998 | Vista Resources, Inc. (A) | Howard | Chalk -A- #15 | 4,000 | 22710953 |
| 472003 | Jan 15, 1998 | Jan 15, 1998 | Vista Resources, Inc. (A) | Howard | Chalk -A- #12 | 4,000 | 22702502 |
| 470010 | Nov 18, 1997 | Nov 18, 1997 | Vista Resources, Inc. (A) | Howard | Clay, H. R. #17 | 4,000 | 22702341 |
| 470009 | Nov 18, 1997 | Nov 18, 1997 | Vista Resources, Inc. (A) | Howard | Chalk -A- #10 | 4,000 | 22702287 |
| 467440 | Sep 18, 1997 | Sep 18, 1997 | Vista Resources, Inc. (A) | Cass | Hawkins-Ross #1 | 11,563 | 06730342 |
| 464883 | Aug 12, 1997 | Aug 12, 1997 | Vista Resources, Inc. (A) | Howard | Chalk, Otis "EO" #7 | 3,600 | 22735042 |
| 465762 | Aug 1, 1997 | Aug 1, 1997 | Vista Resources, Inc. (A) | Andrews | Littman #106 | 4,600 | 00330298 |
| 465022 | Jul 21, 1997 | Jul 21, 1997 | Vista Resources, Inc. (A) | Howard | Reed "C" #1 | 3,900 | 22735074 |
| 463720 | Jul 14, 1997 | Jul 14, 1997 | Vista Resources, Inc. (A) | Scurry | House, E. #14 | 2,000 | 41533596 |
| 463523 | Jun 12, 1997 | Jun 12, 1997 | Vista Resources, Inc. (A) | Scurry | House, E. #13W | 2,000 | 41533591 |
| 463522 | Jun 12, 1997 | Jun 12, 1997 | Vista Resources, Inc. (A) | Scurry | House, E. #11W | 2,000 | 41533592 |
| 463521 | Jun 12, 1997 | Jun 12, 1997 | Vista Resources, Inc. (A) | Scurry | House, E. #8 | 2,000 | 41533593 |
| 462873 | May 30, 1997 | May 30, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #303W | 6,000 | 00338217 |
| 462709 | May 28, 1997 | May 28, 1997 | Vista Resources, Inc. (A) | Howard | Douthit "B" #1W | 4,000 | 22735215 |
| 462349 | May 19, 1997 | May 19, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #205 | 6,000 | 00338210 |
| 459349 | Apr 3, 1997 | Apr 3, 1997 | Vista Resources, Inc. (A) | Howard | Chalk -A- #16 | 3,400 | 22735160 |
| 459347 | Apr 3, 1997 | Apr 3, 1997 | Vista Resources, Inc. (A) | Howard | Chalk, Otis/EO #8 | 3,400 | 22735159 |
| 459348 | Mar 10, 1997 | Mar 10, 1997 | Vista Resources, Inc. (A) | Howard | Chalk -A- #17 | 2,600 | 22735161 |
| 459348Amendment | Mar 10, 1997 | Mar 10, 1997 | Vista Resources, Inc. (A) | Howard | Chalk -A- #17 | 3,800 | 22735161 |
| 457229 | Feb 14, 1997 | Feb 14, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #407 | 4,900 | 00338132 |
| 457229Amendment | Feb 14, 1997 | Feb 14, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #407 | 5,600 | 00338132 |
| 457122 | Feb 14, 1997 | Feb 14, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #406 | 5,600 | 00338124 |
| 457228 | Jan 15, 1997 | Jan 15, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #503 | 4,900 | 00303234 |
| 457227 | Jan 15, 1997 | Jan 15, 1997 | Vista Resources, Inc. (A) | Andrews | Block 9 Unit #301 | 4,900 | 00303245 |
| 455802 | Dec 30, 1996 | Dec 30, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #14 | 1,900 | 41533509 |
| 455801 | Dec 30, 1996 | Dec 30, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #3 | 1,900 | 41504234 |
| 455799 | Dec 30, 1996 | Dec 30, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #5R | 1,900 | 41533511 |
| 455798 | Dec 30, 1996 | Dec 30, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #17 | 1,900 | 41533510 |
| 454892 | Dec 10, 1996 | Dec 10, 1996 | Vista Resources, Inc. (A) | Scurry | Moran, P.J. #11 | 1,700 | 41533504 |
| 455813 | Dec 4, 1996 | Dec 4, 1996 | Vista Resources, Inc. (A) | Howard | Taylor #1 | 9,800 | 22735091 |
| 455813Amendment | Dec 4, 1996 | Dec 4, 1996 | Vista Resources, Inc. (A) | Howard | Taylor, W. C. #1 | 9,800 | 22735091 |
| 455800 | Dec 3, 1996 | Dec 3, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #12 | 1,900 | 41533512 |
| 454122 | Oct 22, 1996 | Oct 22, 1996 | Vista Resources, Inc. (A) | Howard | Douthit "115" #1 | 3,900 | 22735083 |
| 452408 | Oct 9, 1996 | Oct 9, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #16X | 1,900 | 41533442 |
| 452902 | Sep 23, 1996 | Sep 23, 1996 | Vista Resources, Inc. (A) | Howard | Reed "C" #1 | 4,000 | 22735074 |
| 452901 | Sep 23, 1996 | Sep 23, 1996 | Vista Resources, Inc. (A) | Howard | Douthit "B" #9 | 4,000 | 22735073 |
| 450195 | Aug 6, 1996 | Aug 6, 1996 | Vista Resources, Inc. (A) | Scurry | House #12 | 1,900 | 41533419 |
| 450193 | Aug 6, 1996 | Aug 6, 1996 | Vista Resources, Inc. (A) | Scurry | House #10 | 1,900 | 41533417 |
| 450192 | Aug 6, 1996 | Aug 6, 1996 | Vista Resources, Inc. (A) | Scurry | Hardee "B" #16 | 1,900 | 41533416 |
| 449243 | Jul 22, 1996 | Jul 22, 1996 | Vista Resources, Inc. (A) | Howard | Chalk, Otis/EO #7 | 3,200 | 22735042 |
| 450194 | Jul 15, 1996 | Jul 15, 1996 | Vista Resources, Inc. (A) | Scurry | House #9W | 1,900 | 41533418 |
| 448207 | May 21, 1996 | May 21, 1996 | Vista Resources, Inc. (A) | Martin | Tunnell #1 | 11,200 | 31734036 |
| 447868 | May 13, 1996 | May 13, 1996 | Vista Resources, Inc. (A) | Winkler | Waddell #319 | 5,225 | 49530420 |
| 445221 | Mar 6, 1996 | Mar 6, 1996 | Vista Resources, Inc. (A) | Winkler | Waddell #178 | 5,480 | 49501330 |
| 444210 | Feb 12, 1996 | Feb 12, 1996 | Vista Resources, Inc. (A) | Crane | Henderson #1 | 7,200 | 10332681 |
| 442555 | Dec 29, 1995 | Dec 29, 1995 | Vista Resources, Inc. (A) | Andrews | Arrowhead #2 | 11,600 | 00336975 |
| 442973 | Dec 27, 1995 | Dec 27, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #316 | 5,600 | 49530400 |
| 442972 | Dec 27, 1995 | Dec 27, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #403 | 5,600 | 49532346 |
| 442970 | Dec 27, 1995 | Dec 27, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #318 | 5,600 | 49530398 |
| 442969 | Dec 27, 1995 | Dec 27, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #180 | 5,600 | 49501332 |
| 442971 | Dec 22, 1995 | Dec 22, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #317 | 5,600 | 49530399 |
| 441950 | Nov 21, 1995 | Nov 21, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #401 | 5,400 | 49532272 |
| 433622Amendment | Mar 8, 1995 | Mar 8, 1995 | Vista Resources, Inc. (A) | Winkler | Waddell #154H | 8,000 | 49501307 |