| 714455 | Apr 20, 2011 | Apr 20, 2011 | Anadarko E&P Company LP | Briscoe Friday Smith #2HH | 9,000 | 12733985 |
| 714455Amendment | Apr 20, 2011 | Apr 20, 2011 | Anadarko E&P Company LP | Briscoe Friday Smith #2HH | 8,213 | 12733985 |
| 714451 | Apr 20, 2011 | Apr 20, 2011 | Anadarko E&P Company LP | Briscoe Friday Smith #1HH | 9,000 | 12733984 |
| 714451Amendment | Apr 20, 2011 | Apr 20, 2011 | Anadarko E&P Company LP | Briscoe Friday Smith #1HH | 8,161 | 12733984 |
| 714426 | Apr 20, 2011 | Apr 20, 2011 | Chesapeake Operating, Inc. | Faith-Yana #F 2HH | 9,000 | 12733988 |
| 714426Amendment | Apr 20, 2011 | Apr 20, 2011 | Chesapeake Operating, Inc. | Faith-Yana #F 2HH | 9,000 | 12733988 |
| 714423 | Apr 20, 2011 | Apr 20, 2011 | Chesapeake Operating, Inc. | Faith-Yana #F 1HH | 9,000 | 12733989 |
| 714423Amendment | Apr 20, 2011 | Apr 20, 2011 | Chesapeake Operating, Inc. | Faith-Yana #F 1HH | 9,000 | 12733989 |
| 714054 | Apr 19, 2011 | Apr 19, 2011 | Anadarko E&P Company LP | Stumberg Ranch #9HH | 8,700 | 12733978 |
| 714053 | Apr 19, 2011 | Apr 19, 2011 | Anadarko E&P Company LP | Stumberg Ranch #8HH | 8,700 | 12733977 |
| 714049 | Apr 19, 2011 | Apr 19, 2011 | Anadarko E&P Company LP | Stumberg Ranch #7HH | 8,700 | 12733979 |
| 714142 | Apr 15, 2011 | Apr 15, 2011 | Rosetta Resources Operating LP | Briscoe Ranch EF #1H | 8,535 | 12733982 |
| 714097 | Apr 15, 2011 | Apr 15, 2011 | Chesapeake Operating, Inc. | Zientek Unit B #1HH | 12,000 | 12733980 |
| 713908 | Apr 15, 2011 | Apr 15, 2011 | Chesapeake Operating, Inc. | Vesper C Dim #3HH | 12,000 | 12733983 |
| 713905 | Apr 14, 2011 | Apr 14, 2011 | Chesapeake Operating, Inc. | Vesper Dim #B 1HH | 12,000 | 12733976 |
| 713903 | Apr 13, 2011 | Apr 13, 2011 | CML Exploration, LLC | Harold #1 | 4,200 | 12733975 |
| 713903Amendment | Apr 13, 2011 | Apr 13, 2011 | CML Exploration, LLC | Harold #1 | 4,200 | 12733975 |
| 713878 | Apr 13, 2011 | Apr 13, 2011 | Chesapeake Operating, Inc. | Faith-Sandy Dim #A 2HH | 9,000 | 12733973 |
| 713876 | Apr 13, 2011 | Apr 13, 2011 | Chesapeake Operating, Inc. | Faith-Sandy Dim #A 1HH | 9,000 | 12733972 |
| 713876Amendment | Apr 13, 2011 | Apr 13, 2011 | Chesapeake Operating, Inc. | Faith-Sandy Dim #A 1HH | 9,000 | 12733972 |
| 713872 | Apr 13, 2011 | Apr 13, 2011 | Chesapeake Operating, Inc. | Faith-Bonita #D 1HH | 9,000 | 12733974 |
| 713756 | Apr 12, 2011 | Apr 12, 2011 | Chesapeake Operating, Inc. | NHL #3HH | 9,000 | 12733971 |
| 713700 | Apr 11, 2011 | Apr 11, 2011 | Newfield Exploration Company | Cmww B #3602HH | 7,500 | 12733970 |
| 713643 | Apr 11, 2011 | Apr 11, 2011 | Anadarko E&P Company LP | Briscoe Cochina East Ranch #18HH | 9,100 | 12733968 |
| 713638 | Apr 11, 2011 | Apr 11, 2011 | Chesapeake Operating, Inc. | Valley Wells #J 9HH | 9,000 | 12733969 |
| 713506 | Apr 8, 2011 | Apr 8, 2011 | Chesapeake Operating, Inc. | Faith-San Pedro #B 1HH | 9,000 | 12733967 |
| 713476 | Apr 8, 2011 | Apr 8, 2011 | Chesapeake Operating, Inc. | Faith-Bonita #D 2HH | 9,000 | 12733966 |
| 713475 | Apr 8, 2011 | Apr 8, 2011 | Anadarko E&P Company LP | Rancho Encantado #8HH | 9,150 | 12733965 |
| 713475Amendment | Apr 8, 2011 | Apr 8, 2011 | Anadarko E&P Company LP | Rancho Encantado #8HH | 9,250 | 12733965 |
| 713475Amendment | Apr 8, 2011 | Apr 8, 2011 | Anadarko E&P Onshore LLC | Rancho Encantado #8HH | 9,250 | 12733965 |
| 713470 | Apr 8, 2011 | Apr 8, 2011 | Anadarko E&P Company LP | Rancho Encantado #6HH | 9,150 | 12733964 |
| 713470Amendment | Apr 8, 2011 | Apr 8, 2011 | Anadarko E&P Company LP | Rancho Encantado #6HH | 9,250 | 12733964 |
| 713420 | Apr 8, 2011 | Apr 8, 2011 | CML Exploration, LLC | Elaine #1 | 4,500 | 12733963 |
| 713392 | Apr 8, 2011 | Apr 8, 2011 | Chesapeake Operating, Inc. | Faith-Yana D Unit #A 1HH | 9,000 | 12733962 |
| 713355 | Apr 6, 2011 | Apr 6, 2011 | Anadarko E&P Company LP | Rancho Encantado #7HH | 9,150 | 12733961 |
| 713355Amendment | Apr 6, 2011 | Apr 6, 2011 | Anadarko E&P Company LP | Rancho Encantado #7HH | 9,250 | 12733961 |
| 713355Amendment | Apr 6, 2011 | Apr 6, 2011 | Anadarko E&P Onshore LLC | Rancho Encantado #7HH | 7,996 | 12733961 |
| 713331 | Apr 5, 2011 | Apr 5, 2011 | Shell Western E&P | Piloncillo #A 5HH | 9,000 | 12733960 |
| 713331Amendment | Apr 5, 2011 | Apr 5, 2011 | Shell Western E&P | Piloncillo #A 5HH | 15,000 | 12733960 |
| 713313 | Apr 5, 2011 | Apr 5, 2011 | Zaza Energy, LLC | Cenizo Ranch #A 2HH | 12,300 | 12733959 |
| 713310 | Apr 5, 2011 | Apr 5, 2011 | Zaza Energy, LLC | Cenizo Ranch #A 1HH | 12,300 | 12733958 |
| 713226 | Apr 4, 2011 | Apr 4, 2011 | Chesapeake Operating, Inc. | Faith-Bonita #B 4HH | 9,000 | 12733957 |
| 713223 | Apr 4, 2011 | Apr 4, 2011 | Chesapeake Operating, Inc. | Faith-Bonita #B 3HH | 9,000 | 12733954 |
| 713072 | Apr 1, 2011 | Apr 1, 2011 | Anadarko E&P Company LP | Briscoe Catarina South #9HH | 8,600 | 12733953 |
| 713069 | Apr 1, 2011 | Apr 1, 2011 | Anadarko E&P Company LP | Briscoe Catarina South #8HH | 8,600 | 12733951 |
| 713066 | Apr 1, 2011 | Apr 1, 2011 | Anadarko E&P Company LP | Briscoe Catarina South #7HH | 8,600 | 12733952 |
| 713053 | Apr 1, 2011 | Apr 1, 2011 | Chesapeake Operating, Inc. | Flying G Ranch #1HH | 16,500 | 12733950 |
| 713053Amendment | Apr 1, 2011 | Apr 1, 2011 | Chesapeake Operating, Inc. | Flying G Ranch #1HH | 16,500 | 12733950 |
| 713010 | Mar 31, 2011 | Mar 31, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #18HH | 8,300 | 12733949 |
| 713007 | Mar 31, 2011 | Mar 31, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #17HH | 8,300 | 12733948 |
| 712994 | Mar 31, 2011 | Mar 31, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #16HH | 8,300 | 12733947 |
| 712898 | Mar 30, 2011 | Mar 30, 2011 | Chesapeake Operating, Inc. | Valley Wells #J 4HH | 9,000 | 12733946 |
| 712821 | Mar 30, 2011 | Mar 30, 2011 | Chesapeake Operating, Inc. | Betty Wilson #2HH | 12,000 | 12733945 |
| 712686 | Mar 28, 2011 | Mar 28, 2011 | Chesapeake Operating, Inc. | Faith-San Pedro #E 2HH | 9,000 | 12733943 |
| 712686Amendment | Mar 28, 2011 | Mar 28, 2011 | Chesapeake Operating, Inc. | Faith-San Pedro #E 2HH | 9,000 | 12733943 |
| 712536 | Mar 28, 2011 | Mar 28, 2011 | Chesapeake Operating, Inc. | Henrichson #B 5HH | 9,000 | 12733944 |
| 712618 | Mar 24, 2011 | Mar 24, 2011 | Shell Western E&P | Piloncillo #C 4HH | 10,000 | 12733942 |
| 712618Amendment | Mar 24, 2011 | Mar 24, 2011 | Shell Western E&P | Piloncillo #C 4HH | 15,000 | 12733942 |
| 712368 | Mar 23, 2011 | Mar 23, 2011 | Chesapeake Operating, Inc. | Faith-Yana #D 2HH | 9,000 | 12733940 |
| 712317 | Mar 23, 2011 | Mar 23, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #15HH | 8,300 | 12733939 |
| 712311 | Mar 23, 2011 | Mar 23, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #14HH | 8,300 | 12733938 |
| 712286 | Mar 22, 2011 | Mar 22, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #13HH | 8,300 | 12733937 |
| 712272 | Mar 22, 2011 | Mar 22, 2011 | Newfield Exploration Company | Briscoe-McKnight #2401HH | 7,000 | 12733936 |
| 712100 | Mar 22, 2011 | Mar 22, 2011 | Anadarko E&P Company LP | Stumberg Ranch #6HH | 8,200 | 12733935 |
| 712100Amendment | Mar 22, 2011 | Mar 22, 2011 | Anadarko E&P Onshore LLC | Stumberg Ranch #6HH | 7,113 | 12733935 |
| 712090 | Mar 22, 2011 | Mar 22, 2011 | Anadarko E&P Company LP | Stumberg Ranch #5HH | 8,200 | 12733934 |
| 712090Amendment | Mar 22, 2011 | Mar 22, 2011 | Anadarko E&P Onshore LLC | Stumberg Ranch #5HH | 7,148 | 12733934 |
| 712088 | Mar 21, 2011 | Mar 21, 2011 | Anadarko E&P Company LP | Stumberg Ranch #4HRH | 8,200 | 12733933 |
| 712088Amendment | Mar 21, 2011 | Mar 21, 2011 | Anadarko E&P Onshore LLC | Stumberg Ranch #4HRH | 7,177 | 12733933 |
| 712159 | Mar 18, 2011 | Mar 18, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #12HH | 8,500 | 12733931 |
| 712153 | Mar 18, 2011 | Mar 18, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #11HH | 8,500 | 12733932 |
| 712147 | Mar 18, 2011 | Mar 18, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #10HH | 8,500 | 12733930 |
| 712082 | Mar 17, 2011 | Mar 17, 2011 | Chesapeake Operating, Inc. | Faith-Bonita #B 2HH | 9,000 | 12733929 |
| 712076 | Mar 17, 2011 | Mar 17, 2011 | Chesapeake Operating, Inc. | Faith-Bonita #B 1HH | 9,000 | 12733928 |
| 712075 | Mar 17, 2011 | Mar 17, 2011 | Newfield Exploration Company | Moro Creek #3303HH | 7,700 | 12733927 |
| 711947 | Mar 16, 2011 | Mar 16, 2011 | Petroquest Energy, L.L.C. | Dedman #1 | 7,000 | 12733926 |
| 711947Amendment | Mar 16, 2011 | Mar 16, 2011 | Petroquest Energy, L.L.C. | Dedman #1 | 7,000 | 12733926 |
| 711905 | Mar 15, 2011 | Mar 15, 2011 | Chesapeake Operating, Inc. | Pena Creek III Unit E #1HH | 9,000 | 12733922 |
| 711905Amendment | Mar 15, 2011 | Mar 15, 2011 | Chesapeake Operating, Inc. | Pena Creek III Unit E #1HH | 9,000 | 12733922 |
| 711897 | Mar 15, 2011 | Mar 15, 2011 | Basic Energy Services, L.P. | Carrizo Springs SWD #1 | 3,650 | 12733925 |
| 711769 | Mar 15, 2011 | Mar 15, 2011 | Chesapeake Operating, Inc. | Faith-San Pedro #E 1HH | 9,000 | 12733924 |
| 711827 | Mar 11, 2011 | Mar 11, 2011 | Newfield Exploration Company | Moro Creek #3302HH | 8,000 | 12733921 |
| 711757 | Mar 11, 2011 | Mar 11, 2011 | Redemption Oil & Gas, LLC | Shook #301HH | 7,000 | 12733923 |
| 711757Amendment | Mar 11, 2011 | Mar 11, 2011 | Redemption Oil & Gas, LLC | Shook #301HH | 6,163 | 12733923 |
| 711588 | Mar 11, 2011 | Mar 11, 2011 | Chesapeake Operating, Inc. | Henrichson #B 1HH | 9,000 | 12733918 |
| 711688 | Mar 10, 2011 | Mar 10, 2011 | Newfield Exploration Company | Briscoe-McKnight #5972XHH | 7,000 | 12733920 |
| 711659 | Mar 10, 2011 | Mar 10, 2011 | Chesapeake Operating, Inc. | Faith-San Pedro #D 2HH | 9,000 | 12733919 |
| 711565 | Mar 9, 2011 | Mar 9, 2011 | Chesapeake Operating, Inc. | Faith-San Pedro #D 1HH | 9,000 | 12733917 |
| 711487 | Mar 8, 2011 | Mar 8, 2011 | Anadarko E&P Company LP | Briscoe Cochina East Ranch #17HH | 9,100 | 12733916 |
| 711485 | Mar 8, 2011 | Mar 8, 2011 | Anadarko E&P Company LP | Briscoe Cochina East Ranch #16HH | 9,100 | 12733914 |
| 711442 | Mar 8, 2011 | Mar 8, 2011 | Newfield Exploration Company | Moro Creek #3301HH | 8,000 | 12733912 |
| 711345 | Mar 8, 2011 | Mar 8, 2011 | Chesapeake Operating, Inc. | Allee Unit E #1HH | 9,000 | 12733915 |
| 711354 | Mar 7, 2011 | Mar 7, 2011 | Chesapeake Operating, Inc. | Zientek Unit A #1HH | 9,000 | 12733911 |
| 710968 | Mar 7, 2011 | Mar 7, 2011 | Murphy Expl. & Prod. Co. - USA | Kone #2HH | 7,512 | 12733913 |
| 711326 | Mar 4, 2011 | Mar 4, 2011 | Anadarko E&P Company LP | La Bandera Ranch #6HH | 7,500 | 12733909 |
| 711320 | Mar 4, 2011 | Mar 4, 2011 | Anadarko E&P Company LP | Fogmt #7SPH | 7,300 | 12733910 |
| 711270 | Mar 4, 2011 | Mar 4, 2011 | Chesapeake Operating, Inc. | Galm B #1HH | 9,000 | 12733908 |
| 711055 | Mar 2, 2011 | Mar 2, 2011 | Chesapeake Operating, Inc. | Rogers B #2HH | 9,000 | 12733907 |
| 710996 | Feb 28, 2011 | Feb 28, 2011 | Anadarko E&P Company LP | Briscoe Cochina West Ranch #7HH | 9,000 | 12733905 |
| 710996Amendment | Feb 28, 2011 | Feb 28, 2011 | Anadarko E&P Company LP | Briscoe Cochina West Ranch #7HH | 9,000 | 12733905 |