| 646078 | Sep 19, 2007 | Sep 19, 2007 | Chesapeake Operating, Inc. | J. Vela Cuellar Gas Unit A #150535982 | 14,000 |
| 646051 | Sep 17, 2007 | Sep 17, 2007 | El Paso E&P Zapata, L.P. | Benavides "A" #950535981 | 12,500 |
| 645956 | Sep 17, 2007 | Sep 17, 2007 | Laredo Energy | Volpe #250535979 | 12,000 |
| 645947 | Sep 14, 2007 | Sep 14, 2007 | El Paso E&P Zapata, L.P. | Benavides "A" #1050535978 | 11,500 |
| 644362 | Sep 13, 2007 | Sep 13, 2007 | Forest Oil Corporation | Flores, L. G. #5250535957 | 12,300 |
| 644349 | Sep 13, 2007 | Sep 13, 2007 | Forest Oil Corporation | Flores, L. G. #5150535956 | 12,300 |
| 642634 | Sep 13, 2007 | Sep 13, 2007 | Chesapeake Operating, Inc. | Leo Cuellar Gas Unit #350535930 | 12,000 |
| 644163 | Sep 7, 2007 | Sep 7, 2007 | Forest Oil Corporation | Flores, L. G. #5050535954 | 12,300 |
| 645550 | Sep 6, 2007 | Sep 6, 2007 | EOG Resources, Inc. | Slator Ranch #S 550535976 | 13,000 |
| 645547 | Sep 6, 2007 | Sep 6, 2007 | EOG Resources, Inc. | Slator Ranch #T 450535975 | 13,000 |
| 645540 | Sep 6, 2007 | Sep 6, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #950535977 | 16,500 |
| 645536 | Sep 6, 2007 | Sep 6, 2007 | Paloma Resources, LLC | Cuellar, Fernando "A" #A 150535974 | 10,300 |
| 645536Amendment | Sep 6, 2007 | Sep 6, 2007 | Paloma Resources, LLC | Cuellar, Fernando "A" #A 150535974 | 10,300 |
| 645423 | Sep 5, 2007 | Sep 5, 2007 | EOG Resources, Inc. | B. M. Barrocito #950535973 | 12,500 |
| 645347 | Sep 4, 2007 | Sep 4, 2007 | L.O.G. Energy Exploration, Ltd. | El Milagro "B" #150535970 | 10,500 |
| 645157 | Aug 29, 2007 | Aug 29, 2007 | Chesapeake Operating, Inc. | Rash #250534989 | 12,000 |
| 645052 | Aug 29, 2007 | Aug 29, 2007 | Pogo Producing Company | Haynes, L. #18150535968 | 10,500 |
| 645033 | Aug 29, 2007 | Aug 29, 2007 | Ricochet Energy, Inc. | G.G. Salinas #450535967 | 9,500 |
| 643063 | Aug 28, 2007 | Aug 28, 2007 | Forest Oil Corporation | Alfonso #4050535937 | 10,900 |
| 644993 | Aug 27, 2007 | Aug 27, 2007 | EOG Resources, Inc. | Slator Ranch #1AA50535966 | 13,000 |
| 644644 | Aug 22, 2007 | Aug 22, 2007 | Chesapeake Operating, Inc. | Vasquez-Pena-Haynes #350535965 | 12,000 |
| 644644Amendment | Aug 22, 2007 | Aug 22, 2007 | Chesapeake Operating, Inc. | Vasquez-Pena-Haynes #350535965 | 14,000 |
| 644625 | Aug 21, 2007 | Aug 21, 2007 | Forest Oil Corporation | L.G. Flores #5350535964 | 14,600 |
| 644604 | Aug 20, 2007 | Aug 20, 2007 | EOG Resources, Inc. | Slator Ranch #D 250535963 | 12,500 |
| 644563 | Aug 18, 2007 | Aug 18, 2007 | Paloma Resources, LLC | Delozeis "A" #A 150535962 | 13,500 |
| 644459 | Aug 17, 2007 | Aug 17, 2007 | Laredo Energy | Garza #350535961 | 15,000 |
| 644459Amendment | Aug 17, 2007 | Aug 17, 2007 | Laredo Energy | Garza #350535961 | 15,000 |
| 644445 | Aug 17, 2007 | Aug 17, 2007 | Chesapeake Operating, Inc. | Vasquez, Romeo J. #1150535960 | 12,000 |
| 644445Amendment | Aug 17, 2007 | Aug 17, 2007 | Chesapeake Operating, Inc. | Vasquez, Romeo J. #1150535960 | 12,000 |
| 644430 | Aug 17, 2007 | Aug 17, 2007 | Forest Oil Corporation | Asche #11650535959 | 10,800 |
| 644402 | Aug 17, 2007 | Aug 17, 2007 | El Paso E&P Zapata, L.P. | San Fernando #550535958 | 11,500 |
| 644402Amendment | Aug 17, 2007 | Aug 17, 2007 | El Paso E&P Zapata, L.P. | San Fernando #550535958 | 11,500 |
| 642194 | Aug 16, 2007 | Aug 16, 2007 | Forest Oil Corporation | Alfonso #3950535925 | 11,000 |
| 643903 | Aug 11, 2007 | Aug 11, 2007 | Conocophillips Company | Ramirez, L.O. A #650533513 | 10,800 |
| 643938 | Aug 10, 2007 | Aug 10, 2007 | El Paso E&P Zapata, L.P. | Vela, Consuelo #150535953 | 13,500 |
| 643801 | Aug 10, 2007 | Aug 10, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #850535952 | 16,500 |
| 643680 | Aug 9, 2007 | Aug 9, 2007 | Forest Oil Corporation | Asche #11550535951 | 10,800 |
| 643595 | Aug 8, 2007 | Aug 8, 2007 | Conocophillips Company | Raul Volpe Heirs #150535948 | 12,400 |
| 643589 | Aug 8, 2007 | Aug 8, 2007 | Forest Oil Corporation | Haynes "D" #650535950 | 14,000 |
| 641631 | Aug 8, 2007 | Aug 8, 2007 | Houston Exploration Company, The | Haynes #3150535918 | 15,000 |
| 643492 | Aug 7, 2007 | Aug 7, 2007 | Chesapeake Operating, Inc. | Haynes #4050535947 | 12,000 |
| 643474 | Aug 7, 2007 | Aug 7, 2007 | Eagle Oil & Gas Co. | BMT #150535946 | 12,000 |
| 643344 | Aug 4, 2007 | Aug 4, 2007 | Killam Oil Co., Ltd. | De Los Santos #150535945 | 16,000 |
| 643295 | Aug 4, 2007 | Aug 4, 2007 | Conocophillips Company | Jennings Ranch D #3550535944 | 13,300 |
| 643283 | Aug 4, 2007 | Aug 4, 2007 | El Paso E&P Zapata, L.P. | El Clareno #950535943 | 11,500 |
| 643272 | Aug 4, 2007 | Aug 4, 2007 | Chesapeake Operating, Inc. | Alexander "A" #550535942 | 12,000 |
| 643272Amendment | Aug 4, 2007 | Aug 4, 2007 | Chesapeake Operating, Inc. | Alexander "A" #550535942 | 15,000 |
| 643240 | Aug 4, 2007 | Aug 4, 2007 | Conocophillips Company | Jennings Ranch D #3450535941 | 13,175 |
| 643220 | Aug 4, 2007 | Aug 4, 2007 | Forest Oil Corporation | Asche #11450535940 | 13,500 |
| 643220Amendment | Aug 4, 2007 | Aug 4, 2007 | Forest Oil Corporation | Asche #11450535940 | 13,500 |
| 643220Amendment | Aug 4, 2007 | Aug 4, 2007 | Forest Oil Corporation | Asche #11450535940 | 13,500 |
| 643117 | Aug 3, 2007 | Aug 3, 2007 | Ricochet Energy, Inc. | Worley Gas Unit #250535939 | 10,000 |
| 643077 | Aug 2, 2007 | Aug 2, 2007 | Paloma Resources, LLC | Vielmann-Ramirez "A" #A 150535938 | 11,500 |
| 640263Amendment | Aug 2, 2007 | Aug 2, 2007 | Laredo Energy | Fernandez #150535900 | 15,000 |
| 640263Amendment | Aug 2, 2007 | Aug 2, 2007 | Laredo Energy | Fernandez #150535900 | 15,000 |
| 643026 | Aug 1, 2007 | Aug 1, 2007 | Newfield Exploration Company | Flora E. G. de Volpe Unit #250535936 | 13,000 |
| 642710 | Jul 30, 2007 | Jul 30, 2007 | Conocophillips Company | RFM Ltd a GU #250535934 | 11,300 |
| 642699 | Jul 30, 2007 | Jul 30, 2007 | Kebo Oil & Gas, Inc. | Fernando Garza Deep #350535932 | 12,900 |
| 642692 | Jul 30, 2007 | Jul 30, 2007 | Laredo Energy | Haralson Beefmasters, Ltd. #150535933 | 12,000 |
| 642656 | Jul 27, 2007 | Jul 27, 2007 | Forest Oil Corporation | Amando Garza Trust #350535931 | 10,500 |
| 642551 | Jul 27, 2007 | Jul 27, 2007 | Wagner & Brown, Ltd. | Worley #250535172 | 15,460 |
| 639995 | Jul 24, 2007 | Jul 24, 2007 | Pogo Producing Company | Haynes, L. #18050535935 | 10,100 |
| 639995Amendment | Jul 24, 2007 | Jul 24, 2007 | Pogo Producing Company LLC | Haynes, L. #18050535935 | 10,100 |
| 642326 | Jul 21, 2007 | Jul 21, 2007 | Chevron U. S. A. Inc. | S.G. Marshall #3450535928 | 11,500 |
| 642269 | Jul 20, 2007 | Jul 20, 2007 | EOG Resources, Inc. | Barrocito, B. M. #850535926 | 12,500 |
| 642240 | Jul 20, 2007 | Jul 20, 2007 | Forest Oil Corporation | Flores, L. G. #3050535927 | 11,800 |
| 642240Amendment | Jul 20, 2007 | Jul 20, 2007 | Forest Oil Corporation | Flores, L. G. #3050535927 | 11,800 |
| 642240Amendment | Jul 20, 2007 | Jul 20, 2007 | Forest Oil Corporation | Flores, L. G. #3050535927 | 11,800 |
| 642192 | Jul 18, 2007 | Jul 18, 2007 | United Resources LP | Willars #150535923 | 12,500 |
| 642171 | Jul 18, 2007 | Jul 18, 2007 | El Paso E&P Zapata, L.P. | Vela, G. O. et al "A" #450535922 | 13,500 |
| 642096 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Cuellar-Graves Gas Unit #150535921 | 12,000 |
| 642092 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Singer B #550535920 | 12,000 |
| 642286 | Jul 16, 2007 | Jul 16, 2007 | El Paso E&P Zapata, L.P. | Zachry #650535924 | 12,000 |
| 642012 | Jul 16, 2007 | Jul 16, 2007 | Conocophillips Company | Cassin, Edward #1150535919 | 13,200 |
| 641868 | Jul 14, 2007 | Jul 14, 2007 | El Paso E&P Zapata, L.P. | Zachry #450535793 | 12,000 |
| 641801 | Jul 13, 2007 | Jul 13, 2007 | Ricochet Energy, Inc. | Salinas, G. G. #350535917 | 9,500 |
| 641636 | Jul 11, 2007 | Jul 11, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #750535916 | 16,500 |
| 641636Amendment | Jul 11, 2007 | Jul 11, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #750535916 | 16,500 |
| 640388 | Jul 11, 2007 | Jul 11, 2007 | Chesapeake Operating, Inc. | Delia Vasquez #850535902 | 12,000 |
| 641334 | Jul 6, 2007 | Jul 6, 2007 | El Paso E&P Zapata, L.P. | El Clareno #650535756 | 11,000 |
| 641179 | Jul 3, 2007 | Jul 3, 2007 | Devon Energy Production Co, L.P. | Haynes-North #950535915 | 15,000 |
| 641057 | Jul 2, 2007 | Jul 2, 2007 | Conocophillips Company | RFM Ltd a GU #150535914 | 11,300 |
| 641054 | Jun 29, 2007 | Jun 29, 2007 | Conocophillips Company | Garcia, George #250535913 | 11,100 |
| 636869 | Jun 29, 2007 | Jun 29, 2007 | Pogo Producing Company | Rathmell, J. G. #3350535872 | 11,200 |
| 617984Amendment | Jun 29, 2007 | Jun 29, 2007 | Montecristo Exploration, Inc. | Lopez #D 150535562 | 7,900 |
| 640715 | Jun 28, 2007 | Jun 28, 2007 | Aruba Petroleum, Inc. | Gutierrez #350535911 | 11,000 |
| 640826 | Jun 27, 2007 | Jun 27, 2007 | Devon Energy Production Co, L.P. | Thomasma, Ray J. "D" #1350535092 | 12,093 |
| 640971 | Jun 26, 2007 | Jun 26, 2007 | Chesapeake Operating, Inc. | Vasquez, Pena, Haynes #150535912 | 12,000 |
| 640574 | Jun 21, 2007 | Jun 21, 2007 | El Paso E&P Zapata, L.P. | El Clareno #850535910 | 11,500 |
| 640498 | Jun 20, 2007 | Jun 20, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #350535908 | 9,100 |
| 640496 | Jun 20, 2007 | Jun 20, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #250535907 | 9,600 |
| 640476 | Jun 18, 2007 | Jun 18, 2007 | Chesapeake Operating, Inc. | J. Vela Cuellar Gas Unit #350535906 | 14,000 |
| 640440 | Jun 18, 2007 | Jun 18, 2007 | Wagner & Brown, Ltd. | Worley #250535172 | 15,460 |
| 640393 | Jun 18, 2007 | Jun 18, 2007 | Legend Natural Gas II, LP | Whittier Gas Unit 5 #150535905 | 14,000 |
| 640241 | Jun 18, 2007 | Jun 18, 2007 | Chesapeake Operating, Inc. | Morales Gas Unit #250535909 | 17,000 |
| 640177 | Jun 18, 2007 | Jun 18, 2007 | Chevron U. S. A. Inc. | G. Martinez Trust Gas Unit #150535897 | 11,600 |
| 638814 | Jun 18, 2007 | Jun 18, 2007 | Houston Exploration Company, The | Bernardo Gas Unit #1750535878 | 14,400 |
| 640395 | Jun 15, 2007 | Jun 15, 2007 | Legend Natural Gas II, LP | Whittier #850535904 | 14,000 |
| 640391 | Jun 15, 2007 | Jun 15, 2007 | Legend Natural Gas II, LP | Whittier Gas Unit 3 #150535903 | 14,000 |
| 640323 | Jun 15, 2007 | Jun 15, 2007 | Wagner & Brown, Ltd. | Garcia, Finita #150535901 | 18,000 |