| 651903 | Dec 31, 2007 | Dec 31, 2007 | Western Chief Oil & Gas Company | Jones | Milstead #1 | 6,500 | 25334977 |
| 651878 | Dec 31, 2007 | Dec 31, 2007 | Western Chief Oil & Gas Company | Jones | Dorothy Watkins #1 | 5,500 | 25334976 |
| 649851 | Nov 26, 2007 | Nov 26, 2007 | Western Chief Oil & Gas Company | Gaines | Doss Unit #1 | 7,500 | 16536831 |
| 648222 | Oct 26, 2007 | Oct 26, 2007 | Western Chief Oil & Gas Company | Johnson | McCutchin #4 HH | 7,500 | 25132321 |
| 648211 | Oct 26, 2007 | Oct 26, 2007 | Western Chief Oil & Gas Company | Johnson | McCutchin #3 HH | 7,500 | 25132322 |
| 643096 | Sep 7, 2007 | Sep 7, 2007 | Western Chief Oil & Gas Company | Parker | Verstraete #2HH | 5,500 | 36734505 |
| 644712 | Aug 21, 2007 | Aug 21, 2007 | Western Chief Oil & Gas Company | Wise | Dwight Dodson Unit #1HH | 8,000 | 49736331 |
| 643093 | Aug 2, 2007 | Aug 2, 2007 | Western Chief Oil & Gas Company | Parker | Bergman #2HH | 7,500 | 36734504 |
| 640923 | Jun 28, 2007 | Jun 28, 2007 | Western Chief Oil & Gas Company | Grayson | Brookshear #1 | 7,000 | 18131431 |
| 630734 | Dec 21, 2006 | Dec 21, 2006 | Western Chief Oil & Gas Company | Parker | Vieth #1HH | 7,000 | 36734284 |
| 629937 | Dec 4, 2006 | Dec 4, 2006 | Western Chief Oil & Gas Company | Parker | Smith-Evans Unit #1HH | 6,000 | 36734263 |
| 627510 | Oct 16, 2006 | Oct 16, 2006 | Western Chief Oil & Gas Company | Parker | Paschal-Harrison Unit #1HH | 6,000 | 36734204 |
| 626018 | Sep 18, 2006 | Sep 18, 2006 | Western Chief Oil & Gas Company | Wise | Perkins Unit #1HH | 7,500 | 49736126 |
| 624756 | Aug 24, 2006 | Aug 24, 2006 | Western Chief Oil & Gas Company | Denton | Eagle Farms #1HH | 9,000 | 12132943 |
| 623809 | Aug 3, 2006 | Aug 3, 2006 | Western Chief Oil & Gas Company | Palo Pinto | Browder #1HH | 5,000 | 36335574 |
| 622535 | Jul 13, 2006 | Jul 13, 2006 | Western Chief Oil & Gas Company | Parker | Cooper #1HH | 5,500 | 36734088 |
| 620794 | Jun 14, 2006 | Jun 14, 2006 | Western Chief Oil & Gas Company | Denton | Schertz #2HH | 9,000 | 12132877 |
| 620090 | Jun 1, 2006 | Jun 1, 2006 | Western Chief Oil & Gas Company | Parker | Bergman #1HH | 7,500 | 36734031 |
| 619285 | May 16, 2006 | May 16, 2006 | Western Chief Oil & Gas Company | Parker | Spinler #1HH | 6,500 | 36734012 |
| 619285Amendment | May 16, 2006 | May 16, 2006 | Western Chief Oil & Gas Company | Parker | Spinler #1HH | 6,500 | 36734012 |
| 618619 | May 11, 2006 | May 11, 2006 | Western Chief Oil & Gas Company | Wise | Garland #2 | 7,000 | 49735686 |
| 618877 | May 8, 2006 | May 8, 2006 | Western Chief Oil & Gas Company | Wise | Pegues #1R | 9,000 | 49736037 |
| 616482 | Mar 27, 2006 | Mar 27, 2006 | Western Chief Oil & Gas Company | Denton | Justin Ranch Estates Unit #1HH | 9,000 | 12132823 |
| 616273 | Mar 23, 2006 | Mar 23, 2006 | Western Chief Oil & Gas Company | Wise | Pegues #1 | 9,000 | 49736002 |
| 616214 | Mar 22, 2006 | Mar 22, 2006 | Western Chief Oil & Gas Company | Parker | Crosslin Unit #1HH | 9,000 | 36733961 |
| 614453 | Feb 21, 2006 | Feb 21, 2006 | Western Chief Oil & Gas Company | Denton | J & L Unit #1HH | 9,500 | 12132798 |
| 613148 | Feb 1, 2006 | Feb 1, 2006 | Western Chief Oil & Gas Company | Denton | Shepard #3 | 8,200 | 12132082 |
| 612746 | Jan 20, 2006 | Jan 20, 2006 | Western Chief Oil & Gas Company | Parker | Verstraete-Burgoyne Unit #1HH | 5,500 | 36733882 |
| 611252 | Dec 20, 2005 | Dec 20, 2005 | Western Chief Oil & Gas Company | Denton | Cox #2HRH | 9,000 | 12132744 |
| 610898 | Dec 13, 2005 | Dec 13, 2005 | Western Chief Oil & Gas Company | Wise | Foster Unit #1HH | 9,000 | 49735943 |
| 610898Amendment | Dec 13, 2005 | Dec 13, 2005 | Western Chief Oil & Gas Company | Wise | Foster Unit #1 | 7,380 | 49735943 |
| 608816 | Nov 3, 2005 | Nov 3, 2005 | Western Chief Oil & Gas Company | Knox | Richardson #1 | 6,200 | 27532197 |
| 608559 | Oct 27, 2005 | Oct 27, 2005 | Western Chief Oil & Gas Company | Denton | Crown Angel Harris Unit #5HH | 9,000 | 12132714 |
| 606739 | Sep 23, 2005 | Sep 23, 2005 | Western Chief Oil & Gas Company | Johnson | McCutchin #1HH | 7,500 | 25130548 |
| 604830 | Aug 11, 2005 | Aug 11, 2005 | Western Chief Oil & Gas Company | Johnson | McCutchin #2HH | 7,500 | 25130498 |
| 603515 | Jul 15, 2005 | Jul 15, 2005 | Western Chief Oil & Gas Company | Wise | Fortenberry #2HH | 9,000 | 49735877 |
| 602350 | Jun 21, 2005 | Jun 21, 2005 | Western Chief Oil & Gas Company | Wise | Fortenberry #1HH | 9,000 | 49735862 |
| 601542 | Jun 3, 2005 | Jun 3, 2005 | Western Chief Oil & Gas Company | Parker | Raper #1 HH | 7,000 | 36733732 |
| 600488 | May 10, 2005 | May 10, 2005 | Western Chief Oil & Gas Company | Parker | Sisk #1HH | 7,000 | 36733715 |
| 607593 | Apr 26, 2005 | Apr 26, 2005 | Western Chief Oil & Gas Company | Denton | Christian #1 | 9,400 | 12132033 |
| 559984 | Apr 5, 2005 | Apr 5, 2005 | Western Chief Oil & Gas Company | Denton | Cox #1H | 9,000 | 12132571 |
| 559558 | Mar 28, 2005 | Mar 28, 2005 | Western Chief Oil & Gas Company | Denton | Atcheson #1 HH | 9,000 | 12132562 |
| 558559 | Mar 4, 2005 | Mar 4, 2005 | Western Chief Oil & Gas Company | Tarrant | Carr #2 HH | 9,200 | 43931165 |
| 556788 | Jan 26, 2005 | Jan 26, 2005 | Western Chief Oil & Gas Company | Denton | RLM #2 HH | 9,000 | 12132526 |
| 554660 | Dec 10, 2004 | Dec 10, 2004 | Western Chief Oil & Gas Company | Denton | Crown Angel Harris Unit #1HH | 8,500 | 12132479 |
| 554660Amendment | Dec 10, 2004 | Dec 10, 2004 | Western Chief Oil & Gas Company | Denton | Crown Angel Harris Unit #1HH | 9,000 | 12132479 |
| 555214 | Dec 2, 2004 | Dec 2, 2004 | Western Chief Oil & Gas Company | Denton | Christian #3 | 9,500 | 12132074 |
| 555211 | Nov 19, 2004 | Nov 19, 2004 | Western Chief Oil & Gas Company | Denton | Christian #2 | 9,000 | 12132037 |
| 553651Amendment | Nov 18, 2004 | Nov 18, 2004 | Western Chief Oil & Gas Company | Tarrant | Carr #1 HH | 9,200 | 43931058 |
| 553401 | Nov 9, 2004 | Nov 9, 2004 | Western Chief Oil & Gas Company | Denton | Rim #1 HH | 9,000 | 12132461 |
| 553253 | Nov 5, 2004 | Nov 5, 2004 | Western Chief Oil & Gas Company | Parker | Wingate #1 HH | 7,000 | 36733611 |
| 552280 | Oct 14, 2004 | Oct 14, 2004 | Western Chief Oil & Gas Company | Wise | Kennemer #1 HH | 7,000 | 49735705 |
| 550846 | Sep 23, 2004 | Sep 23, 2004 | Western Chief Oil & Gas Company | Wise | Garland #2 | 8,000 | 49735686 |
| 550538 | Sep 7, 2004 | Sep 7, 2004 | Western Chief Oil & Gas Company | Wise | Garland #1 | 8,000 | 49735674 |
| 548756 | Jul 28, 2004 | Jul 28, 2004 | Western Chief Oil & Gas Company | Denton | Christian #4HH | 9,400 | 12132374 |
| 548681 | Jul 23, 2004 | Jul 23, 2004 | Western Chief Oil & Gas Company | Denton | Schertz #1 HH | 9,200 | 12132373 |
| 548443 | Jul 21, 2004 | Jul 21, 2004 | Western Chief Oil & Gas Company | Denton | Poe-Mann #4 | 7,000 | 12132368 |
| 541129 | Feb 3, 2004 | Feb 3, 2004 | Western Chief Oil & Gas Company | Wise | Austin #2HH | 9,000 | 49735519 |
| 541442 | Jan 30, 2004 | Jan 30, 2004 | Western Chief Oil & Gas Company | Denton | Poe-Mann #3 | 7,000 | 12132237 |
| 540085 | Dec 23, 2003 | Dec 23, 2003 | Western Chief Oil & Gas Company | Wise | Austin #1 | 8,000 | 49735489 |
| 538427 | Nov 14, 2003 | Nov 14, 2003 | Western Chief Oil & Gas Company | Wise | Ferguson, Crown #1 | 9,000 | 49735444 |
| 538426 | Nov 14, 2003 | Nov 14, 2003 | Western Chief Oil & Gas Company | Wise | Ferguson, Crown #3 | 9,000 | 49735443 |
| 538425 | Nov 14, 2003 | Nov 14, 2003 | Western Chief Oil & Gas Company | Wise | Ferguson, Crown #2 | 9,000 | 49735442 |
| 535958 | Sep 8, 2003 | Sep 8, 2003 | Western Chief Oil & Gas Company | Denton | Shepard #1 | 9,500 | 12132081 |
| 535960 | Sep 5, 2003 | Sep 5, 2003 | Western Chief Oil & Gas Company | Denton | Shepard #3 | 9,500 | 12132082 |
| 535803 | Aug 27, 2003 | Aug 27, 2003 | Western Chief Oil & Gas Company | Denton | Shepard #2 | 9,500 | 12132073 |
| 535802 | Aug 27, 2003 | Aug 27, 2003 | Western Chief Oil & Gas Company | Denton | Christian #3 | 9,500 | 12132074 |
| 535094 | Aug 8, 2003 | Aug 8, 2003 | Western Chief Oil & Gas Company | Denton | Christian #2 | 9,000 | 12132037 |
| 534908 | Aug 4, 2003 | Aug 4, 2003 | Western Chief Oil & Gas Company | Denton | Christian #1 | 9,000 | 12132033 |
| 534907 | Aug 4, 2003 | Aug 4, 2003 | Western Chief Oil & Gas Company | Denton | Cox Unit #2 | 9,000 | 12132032 |
| 534252 | Jul 16, 2003 | Jul 16, 2003 | Western Chief Oil & Gas Company | Denton | Yvonne Green Unit #1 | 9,000 | 12132007 |
| 533998 | Jul 10, 2003 | Jul 10, 2003 | Western Chief Oil & Gas Company | Denton | Harris #2 | 9,500 | 12132002 |
| 532973 | Jun 10, 2003 | Jun 10, 2003 | Western Chief Oil & Gas Company | Denton | Harris #1 | 9,000 | 12131982 |
| 531871 | May 13, 2003 | May 13, 2003 | Western Chief Oil & Gas Company | Denton | Crown - Harris Angel JV #3 | 9,000 | 12131942 |
| 531871Amendment | May 13, 2003 | May 13, 2003 | Western Chief Oil & Gas Company | Denton | Harris #3 | 9,500 | 12131942 |
| 530802 | Apr 16, 2003 | Apr 16, 2003 | Western Chief Oil & Gas Company | Denton | Crown Neilson Porter Unit #1 | 9,000 | 12131905 |
| 530267 | Apr 3, 2003 | Apr 3, 2003 | Western Chief Oil & Gas Company | Denton | Crown Nelson Unit #2 | 9,000 | 12131889 |
| 529414 | Mar 10, 2003 | Mar 10, 2003 | Western Chief Oil & Gas Company | Denton | Crown Neilson Schrimpf JV #1 #3 | 9,000 | 12131866 |
| 528278 | Feb 10, 2003 | Feb 10, 2003 | Western Chief Oil & Gas Company | Denton | Crown Briscoe North #2 | 8,900 | 12131817 |
| 528277 | Feb 10, 2003 | Feb 10, 2003 | Western Chief Oil & Gas Company | Denton | Crown Briscoe North #1 | 8,900 | 12131816 |
| 526779 | Dec 27, 2002 | Dec 27, 2002 | Western Chief Oil & Gas Company | Denton | Crown-Riley JV #2 #6 | 9,500 | 12131773 |
| 525083 | Oct 30, 2002 | Oct 30, 2002 | Western Chief Oil & Gas Company | Denton | Crown-Riley #4 | 9,500 | 12131717 |
| 525082 | Oct 30, 2002 | Oct 30, 2002 | Western Chief Oil & Gas Company | Denton | Crown-Riley #5 | 9,500 | 12131718 |
| 524610 | Oct 17, 2002 | Oct 17, 2002 | Western Chief Oil & Gas Company | Denton | Crown-Riley Unit #3 | 9,500 | 12131704 |
| 524609 | Oct 17, 2002 | Oct 17, 2002 | Western Chief Oil & Gas Company | Denton | Crown-Riley Unit #1 | 9,500 | 12131705 |
| 523980 | Sep 24, 2002 | Sep 24, 2002 | Western Chief Oil & Gas Company | Denton | Crown-Riley Unit #2 | 9,500 | 12131680 |
| 520668 | Jun 5, 2002 | Jun 5, 2002 | Western Chief Oil & Gas Company | Jack | Kemp-Derrick Unit #1 | 5,700 | 23738670 |
| 519651 | May 3, 2002 | May 3, 2002 | Western Chief Oil & Gas Company | Denton | Briscoe #15 | 8,700 | 12131529 |
| 519650 | May 3, 2002 | May 3, 2002 | Western Chief Oil & Gas Company | Denton | Briscoe #14 | 8,700 | 12131530 |
| 519168 | Apr 17, 2002 | Apr 17, 2002 | Western Chief Oil & Gas Company | Denton | Briscoe #13 | 8,700 | 12131509 |
| 519167 | Apr 17, 2002 | Apr 17, 2002 | Western Chief Oil & Gas Company | Denton | Briscoe #12 | 8,700 | 12131510 |
| 517814 | Feb 27, 2002 | Feb 27, 2002 | Western Chief Oil & Gas Company | Denton | McCutchin #1 | 9,000 | 12131428 |
| 516851 | Feb 27, 2002 | Feb 27, 2002 | Western Chief Oil & Gas Company | Wise | Renshaw-Bobo #1 | 7,800 | 49732207 |
| 517479 | Feb 11, 2002 | Feb 11, 2002 | Western Chief Oil & Gas Company | Denton | Mc Cutcchin #2 | 9,000 | 12131416 |
| 515431 | Dec 12, 2001 | Dec 12, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #11 | 8,999 | 12131283 |
| 515430 | Nov 21, 2001 | Nov 21, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #10 | 8,999 | 12131282 |
| 515424 | Nov 19, 2001 | Nov 19, 2001 | Western Chief Oil & Gas Company | Denton | Poe-Mann #2 | 8,000 | 12131281 |
| 515429 | Nov 16, 2001 | Nov 16, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #9 | 8,999 | 12131280 |
| 515075 | Nov 6, 2001 | Nov 6, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #8 | 8,999 | 12131258 |
| 514645 | Oct 23, 2001 | Oct 23, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #7 | 8,700 | 12131236 |