| 618569 | May 11, 2006 | May 11, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7031 | 4,700 | 39934952 |
| 618569Amendment | May 11, 2006 | May 11, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7031 | 4,700 | 39934952 |
| 618570 | May 9, 2006 | May 9, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7030 | 4,700 | 39934953 |
| 618570Amendment | May 9, 2006 | May 9, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7030 | 4,700 | 39934953 |
| 618546 | May 2, 2006 | May 2, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #5035 | 4,700 | 39934950 |
| 618543 | May 2, 2006 | May 2, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #2018 | 4,700 | 39934951 |
| 617632 | Apr 20, 2006 | Apr 20, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6037 | 4,700 | 39934946 |
| 617632Amendment | Apr 20, 2006 | Apr 20, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6037 | 4,800 | 39934946 |
| 617610 | Apr 14, 2006 | Apr 14, 2006 | Pioneer Exploration, Ltd. | Runnels | Grohman #2 | 4,700 | 39934945 |
| 617610Amendment | Apr 14, 2006 | Apr 14, 2006 | Pioneer Exploration, Ltd. | Runnels | Grohman #2 | 4,700 | 39934945 |
| 614415 | Apr 6, 2006 | Apr 6, 2006 | Pioneer Exploration, Ltd. | Nolan | Jordan, R.H. #24 | 6,200 | 35333052 |
| 616667 | Mar 30, 2006 | Mar 30, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7029 | 4,700 | 39934944 |
| 616658 | Mar 30, 2006 | Mar 30, 2006 | Pioneer Exploration, Ltd. | Runnels | Grohman #1 | 4,700 | 39934943 |
| 615944 | Mar 16, 2006 | Mar 16, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7028 | 4,700 | 39934936 |
| 556681 | Mar 7, 2006 | Mar 7, 2006 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #25 | 6,600 | 35332863 |
| 614911 | Mar 6, 2006 | Mar 6, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7027 | 4,700 | 39934934 |
| 614910 | Mar 6, 2006 | Mar 6, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7026 | 4,700 | 39934933 |
| 614910Amendment | Mar 6, 2006 | Mar 6, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #7026 | 4,700 | 39934933 |
| 614882 | Mar 2, 2006 | Mar 2, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6032 | 4,750 | 39934929 |
| 614881 | Mar 2, 2006 | Mar 2, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6036 | 4,700 | 39934930 |
| 614880 | Mar 2, 2006 | Mar 2, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6035 | 4,700 | 39934931 |
| 614879 | Mar 2, 2006 | Mar 2, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6034 | 4,700 | 39934932 |
| 614787 | Feb 24, 2006 | Feb 24, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6033 | 4,700 | 39934928 |
| 613679 | Feb 13, 2006 | Feb 13, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6030 | 4,700 | 39934924 |
| 613676 | Feb 13, 2006 | Feb 13, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #1706 | 4,600 | 39934925 |
| 613269 | Jan 31, 2006 | Jan 31, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6031 | 4,700 | 39934923 |
| 612848 | Jan 23, 2006 | Jan 23, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #1705 | 4,600 | 39934922 |
| 610827 | Jan 20, 2006 | Jan 20, 2006 | Pioneer Exploration, Ltd. | Nolan | Nolan "D" Fee #5 | 6,300 | 35332893 |
| 610824 | Jan 20, 2006 | Jan 20, 2006 | Pioneer Exploration, Ltd. | Nolan | Nolan "D" Fee #4 | 6,300 | 35332892 |
| 611683 | Jan 4, 2006 | Jan 4, 2006 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #0537 | 4,800 | 39934920 |
| 611201 | Dec 22, 2005 | Dec 22, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #5036 | 4,800 | 39934911 |
| 611166 | Dec 16, 2005 | Dec 16, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #1411 | 4,800 | 39934909 |
| 611161 | Dec 16, 2005 | Dec 16, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #0629 | 4,750 | 39934908 |
| 610188 | Nov 29, 2005 | Nov 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #217 | 4,800 | 39934903 |
| 608601 | Nov 1, 2005 | Nov 1, 2005 | Pioneer Exploration, Ltd. | Scurry | Arledge, G. H. "C" #17 | 6,823 | 41531471 |
| 607698 | Oct 13, 2005 | Oct 13, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #533 | 5,000 | 39934893 |
| 607294 | Oct 6, 2005 | Oct 6, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #5031 | 5,000 | 39934891 |
| 607293 | Oct 6, 2005 | Oct 6, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #5032 | 5,000 | 39934890 |
| 607293Amendment | Oct 6, 2005 | Oct 6, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree-Sykes Unit #5032 | 5,000 | 39934890 |
| 607080 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #0623 | 4,750 | 39934884 |
| 607078 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #0624 | 4,750 | 39934883 |
| 607076 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #0625 | 4,750 | 39934882 |
| 607076Amendment | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #0625 | 4,750 | 39934882 |
| 607075 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #626 | 4,750 | 39934881 |
| 607074 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #627 | 4,750 | 39934880 |
| 607074Amendment | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #627 | 4,750 | 39934880 |
| 607073 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #628 | 4,750 | 39934879 |
| 607073Amendment | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #628 | 4,750 | 39934879 |
| 602611 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. #15 | 6,500 | 35332880 |
| 602609 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. #20 | 6,500 | 35332878 |
| 605366 | Sep 15, 2005 | Sep 15, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6022 | 4,750 | 39934872 |
| 605365 | Aug 24, 2005 | Aug 24, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6021 | 4,750 | 39934871 |
| 605018 | Aug 16, 2005 | Aug 16, 2005 | Pioneer Exploration, Ltd. | Runnels | Cree Sykes Unit #6020 | 4,750 | 39934868 |
| 557235 | Apr 18, 2005 | Apr 18, 2005 | Pioneer Exploration, Ltd. | Wood | Goldsmith, J. B. #11 | 6,574 | 49900782 |
| 556515 | Feb 10, 2005 | Feb 10, 2005 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie "A" #28 | 6,218 | 35332528 |
| 555605 | Jan 5, 2005 | Jan 5, 2005 | Pioneer Exploration, Ltd. | Runnels | Giles, J.M. #18 | 5,500 | 39934851 |
| 555098 | Dec 22, 2004 | Dec 22, 2004 | Pioneer Exploration, Ltd. | Runnels | Miller, Rebecca #16 | 6,500 | 39934846 |
| 552842 | Dec 14, 2004 | Dec 14, 2004 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie "A" #56 | 6,500 | 35332851 |
| 551632 | Dec 9, 2004 | Dec 9, 2004 | Pioneer Exploration, Ltd. | Nolan | TXL -K- #13 | 6,500 | 35332847 |
| 554436 | Dec 8, 2004 | Dec 8, 2004 | Pioneer Exploration, Ltd. | Nolan | Beckham "69" #1 | 6,400 | 35332861 |
| 554436Amendment | Dec 8, 2004 | Dec 8, 2004 | Pioneer Exploration, Ltd. | Nolan | Beckham "69" #1 | 7,100 | 35332861 |
| 554133 | Dec 3, 2004 | Dec 3, 2004 | Pioneer Exploration, Ltd. | Nolan | TXL #2 | 4,200 | 35332859 |
| 554132 | Dec 2, 2004 | Dec 2, 2004 | Pioneer Exploration, Ltd. | Nolan | TXL #1 | 4,200 | 35332860 |
| 554132Amendment | Dec 2, 2004 | Dec 2, 2004 | Pioneer Exploration, Ltd. | Nolan | TXL #1501 | 4,200 | 35332860 |
| 553662 | Nov 22, 2004 | Nov 22, 2004 | Pioneer Exploration, Ltd. | Nolan | Nolan Fee "A" #5 | 6,400 | 35332856 |
| 552842Amendment | Nov 1, 2004 | Nov 1, 2004 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie "A" #56 | 6,500 | 35332851 |
| 552681 | Nov 1, 2004 | Nov 1, 2004 | Pioneer Exploration, Ltd. | Montague | Meyer #8 | 7,300 | 33733612 |
| 552681Amendment | Nov 1, 2004 | Nov 1, 2004 | Pioneer Exploration, Ltd. | Montague | Meyer #8 | 7,300 | 33733612 |
| 550300 | Oct 19, 2004 | Oct 19, 2004 | Pioneer Exploration, Ltd. | Reagan | Husky #22 | 3,000 | 38335472 |
| 550306 | Oct 15, 2004 | Oct 15, 2004 | Pioneer Exploration, Ltd. | Reagan | Robertson-Mulholland #9 | 3,000 | 38335466 |
| 550304 | Oct 12, 2004 | Oct 12, 2004 | Pioneer Exploration, Ltd. | Reagan | Husky #17 | 3,000 | 38335469 |
| 550303 | Oct 12, 2004 | Oct 12, 2004 | Pioneer Exploration, Ltd. | Reagan | Husky #18 | 3,000 | 38335468 |
| 550302 | Oct 12, 2004 | Oct 12, 2004 | Pioneer Exploration, Ltd. | Reagan | Husky #19 | 3,000 | 38335470 |
| 551766 | Oct 5, 2004 | Oct 5, 2004 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie "A" #55 | 6,500 | 35332848 |
| 550305 | Oct 5, 2004 | Oct 5, 2004 | Pioneer Exploration, Ltd. | Reagan | Robertson-Mulholland #12 | 3,000 | 38335467 |
| 550301 | Sep 3, 2004 | Sep 3, 2004 | Pioneer Exploration, Ltd. | Reagan | Husky #21 | 3,000 | 38335471 |
| 548056 | Aug 13, 2004 | Aug 13, 2004 | Pioneer Exploration, Ltd. | Nolan | TXL -K- #12 | 6,500 | 35332838 |
| 548057 | Aug 11, 2004 | Aug 11, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #24 | 6,500 | 35332836 |
| 548054 | Aug 11, 2004 | Aug 11, 2004 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. #22 | 6,500 | 35333054 |
| 547862 | Aug 11, 2004 | Aug 11, 2004 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie "A" #54 | 6,500 | 35332834 |
| 548055 | Aug 10, 2004 | Aug 10, 2004 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. #6 | 6,100 | 35301014 |
| 548053 | Aug 10, 2004 | Aug 10, 2004 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. #21 | 6,500 | 35332840 |
| 548052 | Aug 10, 2004 | Aug 10, 2004 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. "A" #21 | 6,500 | 35332837 |
| 547861 | Aug 9, 2004 | Aug 9, 2004 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie "A" #53 | 6,500 | 35332835 |
| 546629 | Jul 8, 2004 | Jul 8, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #23 | 6,500 | 35332826 |
| 546326 | Jun 22, 2004 | Jun 22, 2004 | Pioneer Exploration, Ltd. | Nolan | Lamkin, C.W. #5 | 6,500 | 35332827 |
| 543886 | May 27, 2004 | May 27, 2004 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. "A" #20 | 6,500 | 35332824 |
| 543894 | May 3, 2004 | May 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #19 | 6,500 | 35332821 |
| 543894Amendment | May 3, 2004 | May 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #19 | 6,500 | 35332821 |
| 543892 | May 3, 2004 | May 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #20 | 6,500 | 35332820 |
| 543890 | May 3, 2004 | May 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #21 | 6,500 | 35333057 |
| 543888 | May 3, 2004 | May 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R. R. #22 | 6,500 | 35332822 |
| 544499 | Apr 15, 2004 | Apr 15, 2004 | Pioneer Exploration, Ltd. | Wise | Doyle, Truitt #2 | 8,900 | 49735582 |
| 543944 | Apr 1, 2004 | Apr 1, 2004 | Pioneer Exploration, Ltd. | Wise | Enis, Sible #2 | 8,900 | 49735576 |
| 542656 | Mar 31, 2004 | Mar 31, 2004 | Pioneer Exploration, Ltd. | Nolan | Petty, R.R. #18 | 6,600 | 35332819 |
| 543295 | Mar 16, 2004 | Mar 16, 2004 | Pioneer Exploration, Ltd. | Montague | Meyer #8 | 7,300 | 33733612 |
| 541413 | Mar 3, 2004 | Mar 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Jordan, R. H. #13 | 6,500 | 35332817 |
| 541389 | Mar 3, 2004 | Mar 3, 2004 | Pioneer Exploration, Ltd. | Nolan | Hanks, Billie 'B' #7 | 5,900 | 35332816 |
| 542148 | Mar 2, 2004 | Mar 2, 2004 | Pioneer Exploration, Ltd. | Crane | Adams 'A' #9 | 3,950 | 10334988 |
| 542149 | Mar 1, 2004 | Mar 1, 2004 | Pioneer Exploration, Ltd. | Crane | Adams 'B' #10 | 3,950 | 10334987 |