| 854634 | Jul 3, 2019 | Jul 3, 2019 | Sulphur River Exploration, Inc. | Lavaca | Kubena Oil Unit #3 | 13,585 | 28532174 |
| 848731 | Mar 7, 2019 | Mar 7, 2019 | Sulphur River Exploration, Inc. | Lavaca | Hathaway Unit #7 | 13,689 | 28532252 |
| 847910 | Dec 20, 2018 | Dec 20, 2018 | Sulphur River Exploration, Inc. | Lavaca | Neuhaus Unit #4 | 11,800 | 28531487 |
| 841752 | Jun 27, 2018 | Jun 27, 2018 | Sulphur River Exploration, Inc. | Hopkins | Santa FE Spindletop #1 | 6,097 | 22330476 |
| 829755 | Aug 11, 2017 | Aug 11, 2017 | Sulphur River Exploration, Inc. | Lavaca | Neuhaus Unit #3 | 9,213 | 28531312 |
| 828863 | Jul 20, 2017 | Jul 20, 2017 | Sulphur River Exploration, Inc. | Lavaca | Neuhaus Unit #4 | 11,800 | 28531487 |
| 827163 | Jun 5, 2017 | Jun 5, 2017 | Sulphur River Exploration, Inc. | Lavaca | Clay Clark #2 | 9,200 | 28531427 |
| 820553 | Dec 8, 2016 | Dec 8, 2016 | Sulphur River Exploration, Inc. | San Patricio | Portland Gas Unit 'A' #5 | 11,100 | 40932636 |
| 815831 | May 20, 2016 | May 20, 2016 | Sulphur River Exploration, Inc. | Cass | Latham 'B' #1 | 9,795 | 06700106 |
| 796123 | Sep 29, 2014 | Sep 29, 2014 | Sulphur River Exploration, Inc. | Cass | Frost Waterflood Unit #5WS | 5,100 | 06700097 |
| 793785 | Sep 3, 2014 | Sep 3, 2014 | Sulphur River Exploration, Inc. | Cass | Frost Waterflood Unit #4WS | 5,100 | 06730030 |
| 791648 | Aug 19, 2014 | Aug 19, 2014 | Sulphur River Exploration, Inc. | Cass | Frost Waterflood Unit #3 | 10,060 | 06700007 |
| 790429 | Jul 30, 2014 | Jul 30, 2014 | Sulphur River Exploration, Inc. | Cass | Frost Waterflood Unit #1WI | 10,150 | 06730785 |
| 778717 | Mar 3, 2014 | Mar 3, 2014 | Sulphur River Exploration, Inc. | San Patricio | Franco #1 | 3,250 | 40933021 |
| 730393 | Jan 20, 2012 | Jan 20, 2012 | Sulphur River Exploration, Inc. | Cass | Frost Unit No. 2 #1 | 10,500 | 06730771 |
| 717678 | Jun 13, 2011 | Jun 13, 2011 | Sulphur River Exploration, Inc. | Cass | V.B. Allsup #2 | 6,900 | 06730037 |
| 717677 | Jun 13, 2011 | Jun 13, 2011 | Sulphur River Exploration, Inc. | Cass | V. B. Allsup #1 | 6,500 | 06700108 |
| 715206 | May 4, 2011 | May 4, 2011 | Sulphur River Exploration, Inc. | Hopkins | Darling #1 | 6,500 | 22330496 |
| 715206Amendment | May 4, 2011 | May 4, 2011 | Sulphur River Exploration, Inc. | Hopkins | Darling #1 | 6,500 | 22330496 |
| 700839 | Aug 19, 2010 | Aug 19, 2010 | Sulphur River Exploration, Inc. | Cass | Frost Unit #1 | 10,200 | 06730762 |
| 671724 | Oct 4, 2008 | Oct 4, 2008 | Sulphur River Exploration, Inc. | Cass | Allsup #6 | 7,200 | 06730756 |
| 657139 | Apr 21, 2008 | Apr 21, 2008 | Sulphur River Exploration, Inc. | Franklin | Laquita #1 | 5,600 | 15930548 |
| 608331 | Sep 14, 2006 | Sep 14, 2006 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #4 | 12,020 | 45931020 |
| 621412 | Jun 22, 2006 | Jun 22, 2006 | Sulphur River Exploration, Inc. | Upshur | Laughlin #4 | 13,000 | 45931320 |
| 618400 | May 1, 2006 | May 1, 2006 | Sulphur River Exploration, Inc. | Upshur | Clemens Unit #1 | 11,900 | 45930011 |
| 610772 | Dec 12, 2005 | Dec 12, 2005 | Sulphur River Exploration, Inc. | Upshur | Dean #1 | 12,100 | 45931293 |
| 608620 | Oct 28, 2005 | Oct 28, 2005 | Sulphur River Exploration, Inc. | Upshur | Indiana Rock Gas Unit No. 5 #6 | 13,000 | 45931034 |
| 607058 | Sep 29, 2005 | Sep 29, 2005 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #7 | 13,000 | 45931086 |
| 604447 | Aug 10, 2005 | Aug 10, 2005 | Sulphur River Exploration, Inc. | Upshur | Arrington-Clemens Gas Unit #2 | 12,100 | 45931270 |
| 601354 | May 31, 2005 | May 31, 2005 | Sulphur River Exploration, Inc. | Leon | Garrett Trust #1 | 17,000 | 28931492 |
| 601354Amendment | May 31, 2005 | May 31, 2005 | Sulphur River Exploration, Inc. | Leon | Garrett Trust #1 | 17,000 | 28931492 |
| 554674 | Dec 10, 2004 | Dec 10, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit NO 12 #1 | 13,000 | 45931233 |
| 554674Amendment | Dec 10, 2004 | Dec 10, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit NO 12 #1 | 13,000 | 45931233 |
| 551887 | Dec 10, 2004 | Dec 10, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 1 #3 | 12,000 | 45930699 |
| 551886 | Oct 7, 2004 | Oct 7, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #4 | 12,220 | 45930715 |
| 550485 | Sep 3, 2004 | Sep 3, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit NO 9 #8 | 13,000 | 45931215 |
| 549587 | Aug 27, 2004 | Aug 27, 2004 | Sulphur River Exploration, Inc. | Upshur | Laughlin #3 | 13,000 | 45931208 |
| 538682 | Mar 8, 2004 | Mar 8, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #7 | 1,250 | 45931086 |
| 538682Amendment | Mar 8, 2004 | Mar 8, 2004 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #7 | 12,050 | 45931086 |
| 538701 | Nov 26, 2003 | Nov 26, 2003 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 11 #2 | 12,100 | 45931115 |
| 538238 | Nov 25, 2003 | Nov 25, 2003 | Sulphur River Exploration, Inc. | Upshur | Trammell Gas Unit #4 | 13,000 | 45931166 |
| 538238Amendment | Nov 25, 2003 | Nov 25, 2003 | Sulphur River Exploration, Inc. | Upshur | Trammell Gas Unit #4H | 16,200 | 45931166 |
| 535487 | Aug 25, 2003 | Aug 25, 2003 | Sulphur River Exploration, Inc. | Franklin | Littrell #2 | 9,800 | 15930521 |
| 533871 | Jul 18, 2003 | Jul 18, 2003 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #2 | 12,025 | 45930720 |
| 532962 | Jun 12, 2003 | Jun 12, 2003 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #6 | 13,069 | 45931088 |
| 530657 | Apr 25, 2003 | Apr 25, 2003 | Sulphur River Exploration, Inc. | Cass | Allsup #3 | 7,110 | 06730045 |
| 530908 | Apr 23, 2003 | Apr 23, 2003 | Sulphur River Exploration, Inc. | Franklin | Littrell #1 | 9,800 | 15930519 |
| 530908Amendment | Apr 23, 2003 | Apr 23, 2003 | Sulphur River Exploration, Inc. | Franklin | Littrell #1 | 9,800 | 15930519 |
| 529736 | Mar 18, 2003 | Mar 18, 2003 | Sulphur River Exploration, Inc. | Cass | Latham S. B #2 | 6,400 | 06730097 |
| 524230 | Oct 29, 2002 | Oct 29, 2002 | Sulphur River Exploration, Inc. | Cass | Blair Gas Unit #2 | 11,000 | 06730738 |
| 524230Amendment | Oct 29, 2002 | Oct 29, 2002 | Sulphur River Exploration, Inc. | Cass | Bryans Mill Unit #27 | 11,000 | 06730738 |
| 524971 | Oct 25, 2002 | Oct 25, 2002 | Sulphur River Exploration, Inc. | Cass | Bryans Mill Unit #26 | 11,000 | 06730735 |
| 522816 | Aug 15, 2002 | Aug 15, 2002 | Sulphur River Exploration, Inc. | Upshur | Clemens #8 | 12,200 | 45931125 |
| 522816Amendment | Aug 15, 2002 | Aug 15, 2002 | Sulphur River Exploration, Inc. | Upshur | Clemens Unit #8 | 12,150 | 45931125 |
| 522815 | Aug 15, 2002 | Aug 15, 2002 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 7 #9 | 12,200 | 45930637 |
| 521268 | Jun 21, 2002 | Jun 21, 2002 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 2 #4 | 12,200 | 45931118 |
| 520090 | May 17, 2002 | May 17, 2002 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit 11 #2 | 12,000 | 45931115 |
| 519595 | May 1, 2002 | May 1, 2002 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #9 | 12,200 | 45931112 |
| 516834 | Jan 15, 2002 | Jan 15, 2002 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #1 | 11,980 | 45900519 |
| 516834Amendment | Jan 15, 2002 | Jan 15, 2002 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #1 | 11,980 | 45900519 |
| 516084 | Dec 12, 2001 | Dec 12, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #7 | 12,200 | 45931095 |
| 515977 | Dec 10, 2001 | Dec 10, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 8 #9 | 12,200 | 45931093 |
| 515976 | Dec 10, 2001 | Dec 10, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 8 #8 | 12,200 | 45931092 |
| 515975 | Dec 10, 2001 | Dec 10, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 8 #7 | 12,200 | 45931091 |
| 515628 | Nov 27, 2001 | Nov 27, 2001 | Sulphur River Exploration, Inc. | Upshur | Clemens Gas Unit #7 | 12,200 | 45931089 |
| 515628Amendment | Nov 27, 2001 | Nov 27, 2001 | Sulphur River Exploration, Inc. | Upshur | Clemens Gas Unit #7 | 13,000 | 45931089 |
| 515146 | Nov 8, 2001 | Nov 8, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #6 | 12,200 | 45931088 |
| 515146Amendment | Nov 8, 2001 | Nov 8, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #6 | 13,000 | 45931088 |
| 514458 | Oct 15, 2001 | Oct 15, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #8 | 12,200 | 45931087 |
| 514458Amendment | Oct 15, 2001 | Oct 15, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #8 | 13,000 | 45931087 |
| 514456 | Oct 15, 2001 | Oct 15, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #7 | 12,200 | 45931086 |
| 514456Amendment | Oct 15, 2001 | Oct 15, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #7 | 13,000 | 45931086 |
| 514454 | Oct 15, 2001 | Oct 15, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 6 #6 | 12,200 | 45931085 |
| 513587 | Sep 14, 2001 | Sep 14, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 7 #7 | 12,200 | 45931082 |
| 513347 | Sep 5, 2001 | Sep 5, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #8 | 12,200 | 45931083 |
| 512817 | Aug 22, 2001 | Aug 22, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 5 #8 | 12,200 | 45931081 |
| 512818 | Aug 21, 2001 | Aug 21, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 2 #3 | 12,200 | 45931080 |
| 512580 | Aug 15, 2001 | Aug 15, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 5 #7 | 12,200 | 45931077 |
| 511887 | Jul 26, 2001 | Jul 26, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #7 | 12,200 | 45931071 |
| 511885 | Jul 26, 2001 | Jul 26, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 3 #6 | 12,200 | 45931070 |
| 507260 | Mar 30, 2001 | Mar 30, 2001 | Sulphur River Exploration, Inc. | Cass | Bryans Mill Smackover Unit #26 | 11,000 | 06730735 |
| 507260Amendment | Mar 30, 2001 | Mar 30, 2001 | Sulphur River Exploration, Inc. | Cass | Latham "B" Gas Unit #2 | 11,000 | 06730735 |
| 506516 | Mar 15, 2001 | Mar 15, 2001 | Sulphur River Exploration, Inc. | Cass | Bryans Mill Smackover Unit #15 | 10,500 | 06700106 |
| 504741Amendment | Feb 28, 2001 | Feb 28, 2001 | Sulphur River Exploration, Inc. | Upshur | Indian Rock Gas Unit No. 9 #5 | 12,100 | 45931044 |
| 502007 | Nov 15, 2000 | Nov 15, 2000 | Sulphur River Exploration, Inc. | Cass | Allsup #3 | 7,100 | 06730045 |
| 474207 | Mar 9, 1998 | Mar 9, 1998 | Sulphur River Exploration, Inc. | Hopkins | Brantley Jackson Smackover Unit #404 | 9,600 | 22330467 |
| 471149 | Dec 12, 1997 | Dec 12, 1997 | Sulphur River Exploration, Inc. | Hopkins | Davis, J. B. #1 | 9,800 | 22330466 |
| 461215 | Apr 16, 1997 | Apr 16, 1997 | Sulphur River Exploration, Inc. | Stonewall | Clack 277 #2 | 3,800 | 43333091 |
| 461214 | Apr 16, 1997 | Apr 16, 1997 | Sulphur River Exploration, Inc. | Stonewall | Coker 277 #1 | 3,800 | 43333092 |
| 454456 | Nov 20, 1996 | Nov 20, 1996 | Sulphur River Exploration, Inc. | Stonewall | Morgan 275 #1 | 3,800 | 43333060 |
| 454454 | Oct 30, 1996 | Oct 30, 1996 | Sulphur River Exploration, Inc. | Stonewall | Kennedy 274 #1 | 3,800 | 43333059 |
| 451415 | Aug 16, 1996 | Aug 16, 1996 | Sulphur River Exploration, Inc. | Stonewall | Clack 277 #1 | 3,800 | 43333051 |
| 451415Amendment | Aug 16, 1996 | Aug 16, 1996 | Sulphur River Exploration, Inc. | Stonewall | Clack 277 #1 | 3,800 | 43333051 |
| 450410 | Jul 22, 1996 | Jul 22, 1996 | Sulphur River Exploration, Inc. | Stonewall | Simmons 302 #2 | 3,800 | 43333044 |
| 444624 | Feb 8, 1996 | Feb 8, 1996 | Sulphur River Exploration, Inc. | Stonewall | Simmons 302 #1 | 3,800 | 43333022 |
| 412399 | Jun 3, 1993 | Jun 3, 1993 | Sulphur River Exploration, Inc. | Hopkins | Brantley Jackson SMK Unit #401 | 9,310 | 22380073 |
| 336728 | Oct 2, 1987 | Oct 2, 1987 | Sulphur River Exploration, Inc. | Jones | Muehlstein #1 | 3,700 | 25333651 |
| 327787 | Mar 18, 1987 | Mar 18, 1987 | Sulphur River Exploration, Inc. | Jones | Barnett #1 | 4,800 | 25333578 |
| 290740 | Nov 18, 1985 | Nov 18, 1985 | Sulphur River Exploration, Inc. | Jones | Apperson, E. D. #1 | 3,600 | 25333359 |
| 279472 | Jul 5, 1985 | Jul 5, 1985 | Sulphur River Exploration, Inc. | Jones | Smith, Marshall #1 | 5,200 | 25333256 |