| 547717 | Jul 2, 2004 | Jul 2, 2004 | Discovery Operating, Inc. | Upton | Holzgraf 34 #8 | 10,600 | 46134587 |
| 546690 | Jun 10, 2004 | Jun 10, 2004 | Discovery Operating, Inc. | Midland | Windham 38 #5 | 10,600 | 32935119 |
| 545383 | May 11, 2004 | May 11, 2004 | Discovery Operating, Inc. | Midland | Holzgraf 22 #7 | 10,600 | 32935101 |
| 544664 | Apr 21, 2004 | Apr 21, 2004 | Discovery Operating, Inc. | Upton | Holzgraf 34 #7 | 10,600 | 46134537 |
| 544664Amendment | Apr 21, 2004 | Apr 21, 2004 | Discovery Operating, Inc. | Upton | Holzgraf 34 #7 | 10,600 | 46134537 |
| 543702 | Apr 21, 2004 | Apr 21, 2004 | Discovery Operating, Inc. | Sherman | Lucille Boothe C #1X | 3,400 | 42130987 |
| 544048 | Apr 5, 2004 | Apr 5, 2004 | Discovery Operating, Inc. | Upton | Holzgraf 34 #6 | 10,600 | 46134524 |
| 543132 | Mar 12, 2004 | Mar 12, 2004 | Discovery Operating, Inc. | Upton | Geronimo 27 #6 | 10,600 | 46134502 |
| 542226 | Feb 20, 2004 | Feb 20, 2004 | Discovery Operating, Inc. | Winkler | Cochise #3R | 10,562 | 49532913 |
| 540651 | Jan 13, 2004 | Jan 13, 2004 | Discovery Operating, Inc. | Upton | Holzgraf 34 #5 | 10,600 | 46134477 |
| 540412 | Jan 8, 2004 | Jan 8, 2004 | Discovery Operating, Inc. | Midland | Holzgraf 22 #6 | 10,600 | 32935036 |
| 538472 | Nov 14, 2003 | Nov 14, 2003 | Discovery Operating, Inc. | Upton | Holzgraf 34 #4 | 10,600 | 46134457 |
| 538465 | Nov 14, 2003 | Nov 14, 2003 | Discovery Operating, Inc. | Upton | Holzgraf 34 #3 | 10,600 | 46134456 |
| 537996 | Oct 30, 2003 | Oct 30, 2003 | Discovery Operating, Inc. | Midland | Windham 40 #7 | 10,600 | 32935006 |
| 537993 | Oct 29, 2003 | Oct 29, 2003 | Discovery Operating, Inc. | Midland | Holzgraf 22 #5 | 10,600 | 32935005 |
| 537233 | Oct 7, 2003 | Oct 7, 2003 | Discovery Operating, Inc. | Midland | Windham 38 #4 | 10,600 | 32934994 |
| 536604 | Sep 22, 2003 | Sep 22, 2003 | Discovery Operating, Inc. | Upton | Geronimo 27 #5 | 10,600 | 46134428 |
| 536142 | Sep 9, 2003 | Sep 9, 2003 | Discovery Operating, Inc. | Upton | Holzgraf 34 #1 | 10,600 | 46134425 |
| 534879 | Aug 4, 2003 | Aug 4, 2003 | Discovery Operating, Inc. | Winkler | Cochise #4 | 11,000 | 49532924 |
| 533256 | Jun 19, 2003 | Jun 19, 2003 | Discovery Operating, Inc. | Midland | Windham 40 #8 | 10,600 | 32934929 |
| 530801 | Apr 16, 2003 | Apr 16, 2003 | Discovery Operating, Inc. | Upton | Holzgraf 34 #2 | 10,600 | 46134378 |
| 530265 | Apr 3, 2003 | Apr 3, 2003 | Discovery Operating, Inc. | Midland | Geronimo 15 #6 | 10,600 | 32934855 |
| 529843 | Mar 24, 2003 | Mar 24, 2003 | Discovery Operating, Inc. | Midland | Geronimo 27 #4 | 10,600 | 32934847 |
| 528375 | Feb 14, 2003 | Feb 14, 2003 | Discovery Operating, Inc. | Midland | Holzgraf 22 #3 | 10,600 | 32934824 |
| 528374 | Feb 14, 2003 | Feb 14, 2003 | Discovery Operating, Inc. | Midland | Holzgraf 22 #2 | 10,600 | 32934825 |
| 528373 | Feb 14, 2003 | Feb 14, 2003 | Discovery Operating, Inc. | Midland | Holzgraf 22 #4 | 10,600 | 32934823 |
| 527833 | Jan 30, 2003 | Jan 30, 2003 | Discovery Operating, Inc. | Midland | Windham 40 #6 | 10,600 | 32934812 |
| 527833Amendment | Jan 30, 2003 | Jan 30, 2003 | Discovery Operating, Inc. | Midland | Windham 40 #6 | 10,600 | 32934812 |
| 526988 | Jan 7, 2003 | Jan 7, 2003 | Discovery Operating, Inc. | Lipscomb | Schultz 783 #1 | 9,750 | 29532535 |
| 526727 | Dec 30, 2002 | Dec 30, 2002 | Discovery Operating, Inc. | Winkler | Cochise #3R | 11,000 | 49532913 |
| 526727Amendment | Dec 30, 2002 | Dec 30, 2002 | Discovery Operating, Inc. | Winkler | Cochise #3R | 11,000 | 49532913 |
| 525928 | Nov 27, 2002 | Nov 27, 2002 | Discovery Operating, Inc. | Winkler | Cochise #3 | 11,000 | 49532911 |
| 524939 | Oct 31, 2002 | Oct 31, 2002 | Discovery Operating, Inc. | Midland | Holzgraf 22 #1 | 10,600 | 32934779 |
| 523955 | Oct 7, 2002 | Oct 7, 2002 | Discovery Operating, Inc. | Midland | Geronimo 15 #5 | 10,600 | 32934758 |
| 523954 | Oct 7, 2002 | Oct 7, 2002 | Discovery Operating, Inc. | Upton | Geronimo 27 #3 | 10,600 | 46134341 |
| 522623 | Aug 8, 2002 | Aug 8, 2002 | Discovery Operating, Inc. | Moore | Boothe B #1X | 3,600 | 34132782 |
| 520711 | Jun 14, 2002 | Jun 14, 2002 | Discovery Operating, Inc. | Midland | Windham 40 #5 | 10,600 | 32934728 |
| 517646 | Feb 21, 2002 | Feb 21, 2002 | Discovery Operating, Inc. | Midland | Geronimo 15 #4 | 10,600 | 32934707 |
| 517178 | Feb 1, 2002 | Feb 1, 2002 | Discovery Operating, Inc. | Midland | Geronimo 27 #2 | 10,600 | 32934703 |
| 515406 | Dec 4, 2001 | Dec 4, 2001 | Discovery Operating, Inc. | Winkler | Cochise #2 | 11,000 | 49532890 |
| 514657 | Oct 26, 2001 | Oct 26, 2001 | Discovery Operating, Inc. | Midland | Txlv 41 #4 | 10,600 | 32934682 |
| 514641 | Oct 22, 2001 | Oct 22, 2001 | Discovery Operating, Inc. | Winkler | Cochise #1 | 11,000 | 49532888 |
| 514205 | Oct 4, 2001 | Oct 4, 2001 | Discovery Operating, Inc. | Midland | Txlv 41 #3 | 10,600 | 32934670 |
| 513293 | Sep 4, 2001 | Sep 4, 2001 | Discovery Operating, Inc. | Upton | Firefly A #2 | 10,500 | 46134219 |
| 510698 | Jun 29, 2001 | Jun 29, 2001 | Discovery Operating, Inc. | Schleicher | Delong A #2 | 6,950 | 41330791 |
| 510679 | Jun 27, 2001 | Jun 27, 2001 | Discovery Operating, Inc. | Midland | Bradford 36 #2 | 10,600 | 32934619 |
| 510674 | Jun 25, 2001 | Jun 25, 2001 | Discovery Operating, Inc. | Moore | Boothe B #1X | 3,600 | 34132782 |
| 509537 | Jun 7, 2001 | Jun 7, 2001 | Discovery Operating, Inc. | Midland | Geronimo 15 #3 | 10,600 | 32934586 |
| 509789 | Jun 6, 2001 | Jun 6, 2001 | Discovery Operating, Inc. | Midland | Txlv 5 #2 | 10,600 | 32934595 |
| 509788 | Jun 6, 2001 | Jun 6, 2001 | Discovery Operating, Inc. | Midland | Txlv 5 #1 | 10,600 | 32934594 |
| 509536 | Jun 5, 2001 | Jun 5, 2001 | Discovery Operating, Inc. | Upton | Geronimo 27 #1 | 10,600 | 46134201 |
| 507387 | Apr 6, 2001 | Apr 6, 2001 | Discovery Operating, Inc. | Midland | Txlv 41 #2 | 10,600 | 32934548 |
| 507386 | Apr 6, 2001 | Apr 6, 2001 | Discovery Operating, Inc. | Midland | Windham 42 #3 | 10,600 | 32934547 |
| 507385 | Apr 6, 2001 | Apr 6, 2001 | Discovery Operating, Inc. | Midland | Geronimo 15 #2 | 10,600 | 32934546 |
| 506652 | Mar 28, 2001 | Mar 28, 2001 | Discovery Operating, Inc. | Schleicher | Bailey #1 | 6,530 | 41330706 |
| 506651 | Mar 28, 2001 | Mar 28, 2001 | Discovery Operating, Inc. | Midland | Geronimo 15 #1 | 10,600 | 32934539 |
| 506650 | Mar 28, 2001 | Mar 28, 2001 | Discovery Operating, Inc. | Midland | Txlv 41 #1 | 10,600 | 32934536 |
| 505745 | Feb 28, 2001 | Feb 28, 2001 | Discovery Operating, Inc. | Midland | Barrow 32 #1SD | 13,248 | 32931243 |
| 505449 | Feb 22, 2001 | Feb 22, 2001 | Discovery Operating, Inc. | Midland | Windham 38 #3 | 10,600 | 32934508 |
| 505448 | Feb 22, 2001 | Feb 22, 2001 | Discovery Operating, Inc. | Midland | Bradford 36 #1 | 10,600 | 32934507 |
| 505447 | Feb 22, 2001 | Feb 22, 2001 | Discovery Operating, Inc. | Midland | Windham 40 #3 | 10,600 | 32934509 |
| 505434 | Feb 16, 2001 | Feb 16, 2001 | Discovery Operating, Inc. | Midland | Windham 40 #4 | 10,600 | 32934506 |
| 504154 | Jan 29, 2001 | Jan 29, 2001 | Discovery Operating, Inc. | Midland | Barrow 36 #1SW | 6,630 | 32913822 |
| 504221 | Jan 23, 2001 | Jan 23, 2001 | Discovery Operating, Inc. | Midland | Windham 42 #2 | 10,600 | 32934482 |
| 503760 | Jan 17, 2001 | Jan 17, 2001 | Discovery Operating, Inc. | Schleicher | Roach B #4 | 7,200 | 41332110 |
| 503758 | Jan 17, 2001 | Jan 17, 2001 | Discovery Operating, Inc. | Schleicher | Fifty One #3 | 7,100 | 41332111 |
| 503766 | Jan 12, 2001 | Jan 12, 2001 | Discovery Operating, Inc. | Midland | Txlv 31 #1 | 10,600 | 32934477 |
| 503458 | Jan 12, 2001 | Jan 12, 2001 | Discovery Operating, Inc. | Midland | Windham 42 #1 | 10,600 | 32934476 |
| 503459 | Dec 29, 2000 | Dec 29, 2000 | Discovery Operating, Inc. | Midland | Txlv 45 #3 | 10,600 | 32934466 |
| 502836 | Dec 13, 2000 | Dec 13, 2000 | Discovery Operating, Inc. | Midland | Txlv 31 #3 | 10,600 | 32934457 |
| 502835 | Dec 13, 2000 | Dec 13, 2000 | Discovery Operating, Inc. | Midland | Windham 40 #1 | 10,600 | 32934456 |
| 502707 | Dec 13, 2000 | Dec 13, 2000 | Discovery Operating, Inc. | Schleicher | Ruth #4 | 7,100 | 41332105 |
| 502687 | Dec 6, 2000 | Dec 6, 2000 | Discovery Operating, Inc. | Midland | Txlv 37 #3 | 10,600 | 32934454 |
| 502509 | Nov 30, 2000 | Nov 30, 2000 | Discovery Operating, Inc. | Schleicher | Lin AY #2 | 7,300 | 41332104 |
| 502355 | Nov 29, 2000 | Nov 29, 2000 | Discovery Operating, Inc. | Midland | Windham 40 #2 | 10,600 | 32934445 |
| 501568 | Nov 8, 2000 | Nov 8, 2000 | Discovery Operating, Inc. | Midland | Txlv 37 #1 | 10,600 | 32934427 |
| 500557 | Oct 18, 2000 | Oct 18, 2000 | Discovery Operating, Inc. | Midland | Windham 38 #2 | 10,600 | 32934392 |
| 499971 | Sep 25, 2000 | Sep 25, 2000 | Discovery Operating, Inc. | Midland | Bradford 44 #1 | 10,600 | 32934380 |
| 499396 | Sep 13, 2000 | Sep 13, 2000 | Discovery Operating, Inc. | Midland | Txlv 43 #1 | 10,600 | 32934363 |
| 499397 | Sep 12, 2000 | Sep 12, 2000 | Discovery Operating, Inc. | Andrews | University 11A #6 | 8,200 | 00338676 |
| 499395 | Sep 12, 2000 | Sep 12, 2000 | Discovery Operating, Inc. | Midland | Txlv 43 #3 | 10,600 | 32934364 |
| 499394 | Sep 12, 2000 | Sep 12, 2000 | Discovery Operating, Inc. | Midland | Txlv 43 #4 | 10,600 | 32934365 |
| 498931 | Aug 30, 2000 | Aug 30, 2000 | Discovery Operating, Inc. | Midland | Txlv 43 #2 | 10,600 | 32934353 |
| 498930 | Aug 30, 2000 | Aug 30, 2000 | Discovery Operating, Inc. | Andrews | University 11A #5 | 8,200 | 00338675 |
| 498930Amendment | Aug 30, 2000 | Aug 30, 2000 | Discovery Operating, Inc. | Andrews | University 11A #5 | 8,200 | 00338675 |
| 498334 | Aug 15, 2000 | Aug 15, 2000 | Discovery Operating, Inc. | Midland | Windham 38 #1 | 10,600 | 32934347 |
| 497284 | Jul 18, 2000 | Jul 18, 2000 | Discovery Operating, Inc. | Midland | Txlv 45 #1 | 10,600 | 32934329 |
| 496531 | Jun 29, 2000 | Jun 29, 2000 | Discovery Operating, Inc. | Lipscomb | Schultz 783 #1 | 10,400 | 29532535 |
| 496324 | Jun 23, 2000 | Jun 23, 2000 | Discovery Operating, Inc. | Andrews | University 11 #7 | 8,200 | 00338647 |
| 496327 | Jun 20, 2000 | Jun 20, 2000 | Discovery Operating, Inc. | Midland | Txlv 39 #2 | 10,600 | 32934322 |
| 496326 | Jun 20, 2000 | Jun 20, 2000 | Discovery Operating, Inc. | Midland | Txlv 39 #3 | 10,600 | 32934321 |
| 496325 | Jun 20, 2000 | Jun 20, 2000 | Discovery Operating, Inc. | Midland | Txlv 39 #4 | 10,600 | 32934320 |
| 496002 | Jun 13, 2000 | Jun 13, 2000 | Discovery Operating, Inc. | Andrews | University 11A #4 | 8,200 | 00338643 |
| 495676 | May 31, 2000 | May 31, 2000 | Discovery Operating, Inc. | Midland | TXL-V "39" #1 | 10,600 | 32934313 |
| 494383 | Apr 25, 2000 | Apr 25, 2000 | Discovery Operating, Inc. | Hockley | Silhan #1 | 7,400 | 21936523 |
| 493032 | Mar 30, 2000 | Mar 30, 2000 | Discovery Operating, Inc. | Upton | Glowbug #2 | 10,600 | 46134035 |
| 488512 | Oct 18, 1999 | Oct 18, 1999 | Discovery Operating, Inc. | Andrews | University 11 #5 | 8,200 | 00338546 |
| 488511 | Oct 18, 1999 | Oct 18, 1999 | Discovery Operating, Inc. | Andrews | University 11 #6 | 8,200 | 00338545 |
| 488377 | Oct 13, 1999 | Oct 13, 1999 | Discovery Operating, Inc. | Andrews | University 11A #3 | 8,200 | 00338543 |
| 486114 | Aug 5, 1999 | Aug 5, 1999 | Discovery Operating, Inc. | Schleicher | Hemphill #1 | 7,000 | 41332067 |