| 788793 | Jul 12, 2014 | Jul 12, 2014 | Welhausen Operating Company, LP | La Salle | STS 'A' #3 HH | 10,000 | 28334909 |
| 789889 | Jul 1, 2014 | Jul 1, 2014 | Welhausen Operating Company, LP | La Salle | STS 'A' #4 HH | 10,000 | 28334950 |
| 781943 | Mar 17, 2014 | Mar 17, 2014 | Welhausen Operating Company, LP | La Salle | STS A #2S | 10,000 | 28334645 |
| 777253 | Feb 5, 2014 | Feb 5, 2014 | Welhausen Operating Company, LP | McMullen | Wheeler, Charles #15 | 1,150 | 31132248 |
| 774960Amendment | Dec 9, 2013 | Dec 9, 2013 | Welhausen Operating Company, LP | La Salle | STS 'A' #1 S | 10,000 | 28334432 |
| 747399 | Sep 10, 2012 | Sep 10, 2012 | Welhausen Operating Company, LP | McMullen | Quintanilla QSM No. 6 #2 | 9,500 | 31135093 |
| 747399Amendment | Sep 10, 2012 | Sep 10, 2012 | Welhausen Operating Company, LP | McMullen | QSM No. 6 #2 | 9,500 | 31135093 |
| 742414 | Jun 15, 2012 | Jun 15, 2012 | Welhausen Operating Company, LP | McMullen | Chudej Unit #2 | 10,350 | 31134993 |
| 720842 | Jul 29, 2011 | Jul 29, 2011 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee A-2 #6 | 11,000 | 31134609 |
| 720842Amendment | Jul 29, 2011 | Jul 29, 2011 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee A-2 #6 | 11,000 | 31134609 |
| 709100 | Feb 3, 2011 | Feb 3, 2011 | Welhausen Operating Company, LP | McMullen | Whitmire, W.A. #1 | 11,000 | 31134494 |
| 706246 | Dec 15, 2010 | Dec 15, 2010 | Welhausen Operating Company, LP | McMullen | Quintanilla SM Deep Lease #1 | 12,000 | 31134326 |
| 703959 | Nov 4, 2010 | Nov 4, 2010 | Welhausen Operating Company, LP | McMullen | Horton, RP -A- #A 6 | 10,500 | 31134306 |
| 704111 | Oct 22, 2010 | Oct 22, 2010 | Welhausen Operating Company, LP | McMullen | Lee Wheeler -C- #1 | 11,000 | 31134303 |
| 703519 | Oct 14, 2010 | Oct 14, 2010 | Welhausen Operating Company, LP | McMullen | Quintanilla-JCB #4 | 10,000 | 31134300 |
| 700928 | Aug 20, 2010 | Aug 20, 2010 | Welhausen Operating Company, LP | McMullen | Chudej Unit #1 | 12,500 | 31131893 |
| 697167 | Jun 9, 2010 | Jun 9, 2010 | Welhausen Operating Company, LP | McMullen | San Miguel No. 1 #401 | 12,000 | 31132370 |
| 697167Amendment | Jun 9, 2010 | Jun 9, 2010 | Welhausen Operating Company, LP | McMullen | San Miguel No. 1 #401 | 12,000 | 31132370 |
| 696541 | May 28, 2010 | May 28, 2010 | Welhausen Operating Company, LP | McMullen | Stone #2 | 11,000 | 31134235 |
| 696459 | May 26, 2010 | May 26, 2010 | Welhausen Operating Company, LP | McMullen | Stone #1 | 11,000 | 31134234 |
| 696279 | May 21, 2010 | May 21, 2010 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee A-2 #A 5 | 11,000 | 31134231 |
| 694520 | Apr 29, 2010 | Apr 29, 2010 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee A-2 #A 4 | 11,000 | 31134225 |
| 692894 | Mar 23, 2010 | Mar 23, 2010 | Welhausen Operating Company, LP | McMullen | Quintanilla FBH #2 | 11,000 | 31134213 |
| 692894Amendment | Mar 23, 2010 | Mar 23, 2010 | Welhausen Operating Company, LP | McMullen | Quintanilla FBH #2 | 11,000 | 31134213 |
| 689191 | Jan 6, 2010 | Jan 6, 2010 | Welhausen Operating Company, LP | McMullen | Mobil Wheeler #5 | 12,000 | 31134185 |
| 687198 | Nov 18, 2009 | Nov 18, 2009 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee A-2 #A 3 | 11,000 | 31134173 |
| 686576 | Oct 26, 2009 | Oct 26, 2009 | Welhausen Operating Company, LP | McMullen | Quintanilla FBH #1 | 11,000 | 31134169 |
| 676940 | Jan 7, 2009 | Jan 7, 2009 | Welhausen Operating Company, LP | McMullen | Q-JCB-A #3 | 12,000 | 31134123 |
| 675601 | Dec 1, 2008 | Dec 1, 2008 | Welhausen Operating Company, LP | McMullen | Horton, R. P. "A" #8 | 11,000 | 31134118 |
| 675519 | Dec 1, 2008 | Dec 1, 2008 | Welhausen Operating Company, LP | McMullen | Horton, R P No. 18 #1803 | 12,000 | 31134117 |
| 674250 | Nov 13, 2008 | Nov 13, 2008 | Welhausen Operating Company, LP | McMullen | Horton, R P -A- #A 7 | 12,000 | 31134112 |
| 674250Amendment | Nov 13, 2008 | Nov 13, 2008 | Welhausen Operating Company, LP | McMullen | Horton, R P -A- #A 7 | 12,000 | 31134112 |
| 670359 | Sep 18, 2008 | Sep 18, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #7 | 12,000 | 31134103 |
| 670356 | Sep 18, 2008 | Sep 18, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #6 | 12,000 | 31134102 |
| 666329 | Sep 15, 2008 | Sep 15, 2008 | Welhausen Operating Company, LP | McMullen | Quintanilla, Paloma Horton #6 | 11,000 | 31134095 |
| 667830 | Aug 15, 2008 | Aug 15, 2008 | Welhausen Operating Company, LP | McMullen | Mobil Wheeler #4 | 12,000 | 31134089 |
| 667820 | Aug 14, 2008 | Aug 14, 2008 | Welhausen Operating Company, LP | McMullen | Mobil Wheeler #3 | 12,000 | 31134087 |
| 667712 | Aug 13, 2008 | Aug 13, 2008 | Welhausen Operating Company, LP | McMullen | Mobil Wheeler #2 | 12,000 | 31134086 |
| 666637 | Aug 2, 2008 | Aug 2, 2008 | Welhausen Operating Company, LP | McMullen | Paloma-Horton Quintanilla #8 | 11,000 | 31134082 |
| 666561 | Aug 1, 2008 | Aug 1, 2008 | Welhausen Operating Company, LP | McMullen | Paloma-Horton #2 | 11,000 | 31134081 |
| 666354 | Jul 29, 2008 | Jul 29, 2008 | Welhausen Operating Company, LP | McMullen | Paloma - Horton Quintanilla #7 | 11,000 | 31134080 |
| 663151 | Jun 17, 2008 | Jun 17, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -A- #2 | 12,000 | 31134068 |
| 659922 | May 1, 2008 | May 1, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #4 | 12,000 | 31134051 |
| 658225 | Apr 10, 2008 | Apr 10, 2008 | Welhausen Operating Company, LP | McMullen | Zavisch #14 | 12,000 | 31134041 |
| 658000 | Apr 7, 2008 | Apr 7, 2008 | Welhausen Operating Company, LP | McMullen | Ballard, Horton #11 | 11,000 | 31134037 |
| 658224 | Apr 1, 2008 | Apr 1, 2008 | Welhausen Operating Company, LP | McMullen | Zavisch #12 | 12,000 | 31134039 |
| 657554 | Mar 28, 2008 | Mar 28, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen #2 | 10,500 | 31132816 |
| 657551 | Mar 28, 2008 | Mar 28, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen #1 | 10,100 | 31131912 |
| 656521 | Mar 19, 2008 | Mar 19, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen #3 | 11,000 | 31133911 |
| 654590 | Feb 12, 2008 | Feb 12, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #10 | 11,000 | 31134026 |
| 654584 | Feb 12, 2008 | Feb 12, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee-B- #9 | 11,000 | 31134025 |
| 654584Amendment | Feb 12, 2008 | Feb 12, 2008 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee-B- #9 | 11,000 | 31134025 |
| 647202 | Oct 8, 2007 | Oct 8, 2007 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen #5 | 11,000 | 31134005 |
| 646312 | Sep 21, 2007 | Sep 21, 2007 | Welhausen Operating Company, LP | McMullen | Quintanilla -B- #B 2 | 10,000 | 31134000 |
| 643311 | Aug 15, 2007 | Aug 15, 2007 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen #4 | 11,000 | 31133983 |
| 642735 | Jul 31, 2007 | Jul 31, 2007 | Welhausen Operating Company, LP | McMullen | Quintanilla-B- #B 3 | 10,000 | 31133982 |
| 635147 | Apr 14, 2007 | Apr 14, 2007 | Welhausen Operating Company, LP | McMullen | Zavisch "A" #A 11 | 11,000 | 31133959 |
| 635440 | Mar 23, 2007 | Mar 23, 2007 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #5 | 11,000 | 31133951 |
| 635438 | Mar 23, 2007 | Mar 23, 2007 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #8 | 11,000 | 31133950 |
| 632784 | Feb 13, 2007 | Feb 13, 2007 | Welhausen Operating Company, LP | McMullen | Horton R P #2 | 10,000 | 31133943 |
| 626366 | Sep 29, 2006 | Sep 29, 2006 | Welhausen Operating Company, LP | McMullen | JCB-Quintanilla #2 | 10,000 | 31133918 |
| 624695 | Aug 24, 2006 | Aug 24, 2006 | Welhausen Operating Company, LP | McMullen | Horton, R. P. -A- #A 5 | 10,000 | 31133915 |
| 624168 | Aug 17, 2006 | Aug 17, 2006 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen -A- #A 2 | 11,000 | 31133914 |
| 623823 | Aug 10, 2006 | Aug 10, 2006 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #3 | 11,000 | 31133913 |
| 623817 | Aug 10, 2006 | Aug 10, 2006 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #2 | 11,000 | 31133912 |
| 623034 | Aug 1, 2006 | Aug 1, 2006 | Welhausen Operating Company, LP | McMullen | Wheeler, Karen #3 | 11,000 | 31133911 |
| 622753 | Jul 20, 2006 | Jul 20, 2006 | Welhausen Operating Company, LP | McMullen | Ballard, Horton #9 | 9,629 | 31133777 |
| 620132 | Jun 7, 2006 | Jun 7, 2006 | Welhausen Operating Company, LP | Webb | Beasley-Meador "B" #12 | 7,500 | 47939540 |
| 620128 | Jun 7, 2006 | Jun 7, 2006 | Welhausen Operating Company, LP | Webb | Beasley-Meador "A" #11 | 7,500 | 47939539 |
| 616365 | Mar 29, 2006 | Mar 29, 2006 | Welhausen Operating Company, LP | McMullen | Horton - Ballard #10 | 10,000 | 31133898 |
| 616364 | Mar 29, 2006 | Mar 29, 2006 | Welhausen Operating Company, LP | McMullen | Zavisch -A- #A 10 | 11,000 | 31133899 |
| 612444 | Jan 20, 2006 | Jan 20, 2006 | Welhausen Operating Company, LP | McMullen | Zavisch -A- #A 9 | 10,500 | 31133886 |
| 612443 | Jan 20, 2006 | Jan 20, 2006 | Welhausen Operating Company, LP | McMullen | Zavisch -A- #8 | 10,500 | 31133885 |
| 612442 | Jan 20, 2006 | Jan 20, 2006 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee -B- #1 | 10,500 | 31133884 |
| 606186 | Sep 14, 2005 | Sep 14, 2005 | Welhausen Operating Company, LP | McMullen | Horton Ballard #9 | 9,629 | 31133777 |
| 605122 | Aug 19, 2005 | Aug 19, 2005 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee #7 | 10,500 | 31133843 |
| 603007 | Jul 6, 2005 | Jul 6, 2005 | Welhausen Operating Company, LP | McMullen | Horton RR -B- #1802 | 10,000 | 31133827 |
| 601468 | Jun 3, 2005 | Jun 3, 2005 | Welhausen Operating Company, LP | McMullen | Q-JCB-A #2 | 9,800 | 31133816 |
| 559618 | Apr 1, 2005 | Apr 1, 2005 | Welhausen Operating Company, LP | McMullen | Horton, R P -B- #2202 | 9,800 | 31133796 |
| 559341 | Mar 22, 2005 | Mar 22, 2005 | Welhausen Operating Company, LP | McMullen | Quintanilla -B- #B 1 | 9,800 | 31133795 |
| 554410 | Dec 6, 2004 | Dec 6, 2004 | Welhausen Operating Company, LP | McMullen | Horton - Ballard #9 | 10,000 | 31133777 |
| 552125 | Oct 19, 2004 | Oct 19, 2004 | Welhausen Operating Company, LP | McMullen | Q-JCB-A #1 | 9,800 | 31133765 |
| 552293 | Oct 18, 2004 | Oct 18, 2004 | Welhausen Operating Company, LP | McMullen | Quintanilla, Paloma Horton #6 | 9,800 | 31134095 |
| 551968 | Oct 11, 2004 | Oct 11, 2004 | Welhausen Operating Company, LP | McMullen | Quintanilla, Paloma Horton #5 | 9,800 | 31133764 |
| 551968Amendment | Oct 11, 2004 | Oct 11, 2004 | Welhausen Operating Company, LP | McMullen | Quintanilla, Paloma Horton #5 | 9,800 | 31133764 |
| 551885 | Oct 7, 2004 | Oct 7, 2004 | Welhausen Operating Company, LP | McMullen | Horton, R P -A- #4 | 9,800 | 31133762 |
| 551884 | Oct 7, 2004 | Oct 7, 2004 | Welhausen Operating Company, LP | McMullen | Quintanilla, Paloma Horton #4 | 9,800 | 31133763 |
| 551884Amendment | Oct 7, 2004 | Oct 7, 2004 | Welhausen Operating Company, LP | McMullen | Quintanilla, Paloma Horton #4 | 9,800 | 31133763 |
| 549461 | Aug 17, 2004 | Aug 17, 2004 | Welhausen Operating Company, LP | Webb | Meador, Beasley #9 | 7,000 | 47938821 |
| 549460 | Aug 17, 2004 | Aug 17, 2004 | Welhausen Operating Company, LP | Webb | Meador, Beasley #10 | 7,000 | 47938822 |
| 539384 | Dec 9, 2003 | Dec 9, 2003 | Welhausen Operating Company, LP | McMullen | Zavisch -A- #7 | 10,500 | 31133725 |
| 538301 | Nov 6, 2003 | Nov 6, 2003 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee #6 | 10,250 | 31133722 |
| 538173 | Nov 5, 2003 | Nov 5, 2003 | Welhausen Operating Company, LP | McMullen | Wheeler, Lee #5 | 10,250 | 31133720 |
| 536932 | Sep 30, 2003 | Sep 30, 2003 | Welhausen Operating Company, LP | McMullen | Paloma-Horton-Quintanilla #1 | 10,000 | 31133707 |
| 536643 | Sep 22, 2003 | Sep 22, 2003 | Welhausen Operating Company, LP | McMullen | Horton-JCB #2 | 10,000 | 31133706 |
| 525454 | Nov 13, 2002 | Nov 13, 2002 | Welhausen Operating Company, LP | McMullen | Quintanilla - JCB #3 | 9,600 | 31133674 |
| 524750 | Oct 18, 2002 | Oct 18, 2002 | Welhausen Operating Company, LP | McMullen | Paloma-Horton Quintanilla #2 | 9,700 | 31133673 |
| 521254 | Jun 27, 2002 | Jun 27, 2002 | Welhausen Operating Company, LP | McMullen | Quintanilla San Miguel #3 | 9,251 | 31132569 |