| 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 |
| 640923 | Jun 28, 2007 | Jun 28, 2007 | Western Chief Oil & Gas Company | Grayson | Brookshear #1 | 7,000 | 18131431 |
| 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 |
| 616273 | Mar 23, 2006 | Mar 23, 2006 | Western Chief Oil & Gas Company | Wise | Pegues #1 | 9,000 | 49736002 |
| 613148 | Feb 1, 2006 | Feb 1, 2006 | Western Chief Oil & Gas Company | Denton | Shepard #3 | 8,200 | 12132082 |
| 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 |
| 607593 | Apr 26, 2005 | Apr 26, 2005 | Western Chief Oil & Gas Company | Denton | Christian #1 | 9,400 | 12132033 |
| 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 |
| 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 |
| 548443 | Jul 21, 2004 | Jul 21, 2004 | Western Chief Oil & Gas Company | Denton | Poe-Mann #4 | 7,000 | 12132368 |
| 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 |
| 514434 | Oct 15, 2001 | Oct 15, 2001 | Western Chief Oil & Gas Company | Denton | Fen-Fen Unit #1 | 9,000 | 12131216 |
| 514404 | Oct 15, 2001 | Oct 15, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #6 | 8,700 | 12131220 |
| 514404Amendment | Oct 15, 2001 | Oct 15, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #6 | 8,700 | 12131220 |
| 512765 | Aug 22, 2001 | Aug 22, 2001 | Western Chief Oil & Gas Company | Denton | Poe-Mann #1 | 7,000 | 12131153 |
| 512765Amendment | Aug 22, 2001 | Aug 22, 2001 | Western Chief Oil & Gas Company | Denton | Poe-Mann #1 | 8,000 | 12131153 |
| 510404 | Jul 3, 2001 | Jul 3, 2001 | Western Chief Oil & Gas Company | Denton | Beckman Unit #1 | 9,000 | 12131076 |
| 510404Amendment | Jul 3, 2001 | Jul 3, 2001 | Western Chief Oil & Gas Company | Denton | Beckman Unit #1 | 9,000 | 12131076 |
| 510404Amendment | Jul 3, 2001 | Jul 3, 2001 | Western Chief Oil & Gas Company | Denton | Crown-Baldinger JV#4 #9 | 9,000 | 12131076 |
| 510812 | Jul 2, 2001 | Jul 2, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #5 | 8,700 | 12131083 |
| 510811 | Jul 2, 2001 | Jul 2, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #4 | 8,700 | 12131082 |
| 510405 | Jun 21, 2001 | Jun 21, 2001 | Western Chief Oil & Gas Company | Denton | Hickory Creek Estates Unit #2 | 9,000 | 12131047 |
| 510405Amendment | Jun 21, 2001 | Jun 21, 2001 | Western Chief Oil & Gas Company | Denton | Hickory Creek Estates Unit #3 | 9,000 | 12131047 |
| 510403 | Jun 21, 2001 | Jun 21, 2001 | Western Chief Oil & Gas Company | Denton | Hickory Creek Estates Unit #1 | 9,000 | 12131046 |
| 510403Amendment | Jun 21, 2001 | Jun 21, 2001 | Western Chief Oil & Gas Company | Denton | Hickory Creek Estates Unit #2 | 9,000 | 12131046 |
| 509881 | Jun 6, 2001 | Jun 6, 2001 | Western Chief Oil & Gas Company | Wise | Aasletten #1 | 8,990 | 49733103 |
| 508926 | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger-US Trust, NY Unit #2 | 9,100 | 12131010 |
| 508926Amendment | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger Unit #1 | 9,100 | 12131010 |
| 508925 | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger-US Trust, NY Unit #1 | 9,100 | 12131009 |
| 508925Amendment | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger-Unit #4 | 9,100 | 12131009 |
| 508924 | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger #2 | 9,100 | 12131008 |
| 508924Amendment | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger #2 | 9,100 | 12131008 |
| 508923 | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger #1 | 9,100 | 12131007 |
| 508923Amendment | May 14, 2001 | May 14, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger #5 | 9,100 | 12131007 |
| 508286 | Apr 27, 2001 | Apr 27, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger-Medelberg Unit #1 | 9,100 | 12130997 |
| 508286Amendment | Apr 27, 2001 | Apr 27, 2001 | Western Chief Oil & Gas Company | Denton | Baldinger-Medelberg Unit #1A | 9,100 | 12130997 |
| 507376 | Apr 4, 2001 | Apr 4, 2001 | Western Chief Oil & Gas Company | Wise | Penton #1 | 8,850 | 49734673 |
| 507273 | Apr 2, 2001 | Apr 2, 2001 | Western Chief Oil & Gas Company | Denton | Beckman-Pucci Unit #1 | 9,100 | 12130965 |
| 506070 | Mar 8, 2001 | Mar 8, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #2 | 8,700 | 12130937 |
| 506069 | Mar 8, 2001 | Mar 8, 2001 | Western Chief Oil & Gas Company | Denton | Briscoe #3 | 8,700 | 12130936 |
| 500946 | Oct 18, 2000 | Oct 18, 2000 | Western Chief Oil & Gas Company | Montague | Mayo #1 | 7,000 | 33733366 |
| 500022 | Sep 27, 2000 | Sep 27, 2000 | Western Chief Oil & Gas Company | Denton | Briscoe #1 | 8,700 | 12130831 |
| 481437 | Dec 15, 1998 | Dec 15, 1998 | Western Chief Oil & Gas Company | Parker | Ross #1 | 5,500 | 36733341 |
| 481436 | Dec 15, 1998 | Dec 15, 1998 | Western Chief Oil & Gas Company | Parker | McClendon, P. D. #1 | 3,800 | 36733340 |
| 471006 | Dec 9, 1997 | Dec 9, 1997 | Western Chief Oil & Gas Company | Gaines | Arco-Mobil #1 | 5,800 | 16535307 |
| 446355 | Mar 27, 1996 | Mar 27, 1996 | Western Chief Oil & Gas Company | Wise | Kramer-Nivens Unit #2 | 7,400 | 49734060 |
| 445858 | Mar 13, 1996 | Mar 13, 1996 | Western Chief Oil & Gas Company | Montague | Winn, Hazel #3 | 6,400 | 33733090 |
| 442203 | Nov 27, 1995 | Nov 27, 1995 | Western Chief Oil & Gas Company | Wise | Kramer-Nivens #1 | 7,200 | 49733972 |
| 442203Amendment | Nov 27, 1995 | Nov 27, 1995 | Western Chief Oil & Gas Company | Wise | Kramer-Nivens #1 | 7,200 | 49733972 |
| 441218 | Oct 24, 1995 | Oct 24, 1995 | Western Chief Oil & Gas Company | Montague | Winn, Hazel #2 | 6,300 | 33733057 |
| 439430 | Aug 30, 1995 | Aug 30, 1995 | Western Chief Oil & Gas Company | Montague | Winn, Hazel #1 | 6,400 | 33733051 |
| 431909 | Jan 20, 1995 | Jan 20, 1995 | Western Chief Oil & Gas Company | Jack | Booth, G. C. "D" #14 | 2,900 | 23704945 |
| 425027 | Jun 17, 1994 | Jun 17, 1994 | Western Chief Oil & Gas Company | Palo Pinto | Germany #1 | 4,500 | 36334288 |