| 619135 | May 12, 2006 | May 12, 2006 | EOG Resources, Inc. | Hardcastle Unit #2HH | 7,000 | 25130984 |
| 619119 | May 12, 2006 | May 12, 2006 | Quicksilver Resources Inc. | Charca-Hanger Unit #1HH | 6,400 | 25130983 |
| 618771 | May 12, 2006 | May 12, 2006 | EOG Resources, Inc. | Luttrell Unit #2HH | 8,500 | 25130976 |
| 618770 | May 12, 2006 | May 12, 2006 | EOG Resources, Inc. | Luttrell Unit #1HH | 8,500 | 25130975 |
| 618728 | May 12, 2006 | May 12, 2006 | EOG Resources, Inc. | Hays Unit #1HH | 7,000 | 25130974 |
| 619047 | May 11, 2006 | May 11, 2006 | J-W Operating Co. | Brownlee #3HH | 13,000 | 25130980 |
| 619064 | May 10, 2006 | May 10, 2006 | Four Sevens Operating Co., Ltd. | Hidden Creek #1HH | 9,000 | 25130981 |
| 619064Amendment | May 10, 2006 | May 10, 2006 | Four Sevens Operating Co., Ltd. | Hidden Creek #1HH | 9,000 | 25130981 |
| 619013 | May 10, 2006 | May 10, 2006 | North Texas Llano Operating Corp | Clark #1H | 9,000 | 25130979 |
| 618501 | May 10, 2006 | May 10, 2006 | EOG Resources, Inc. | Bowerman Unit #2HH | 7,000 | 25130970 |
| 618501Amendment | May 10, 2006 | May 10, 2006 | EOG Resources, Inc. | Bowerman Unit #2HH | 7,000 | 25130970 |
| 618872 | May 8, 2006 | May 8, 2006 | Aspect Energy, LLC | Klondike Ranch #2HH | 7,700 | 25130973 |
| 618673 | May 4, 2006 | May 4, 2006 | North Texas Llano Operating Corp | Basden #1H | 9,000 | 25130972 |
| 618649 | May 4, 2006 | May 4, 2006 | Tsar Operating Company | Mustang Creek Unit 3 #8HH | 10,600 | 25130971 |
| 618370 | May 4, 2006 | May 4, 2006 | EOG Resources, Inc. | Leonard Unit #2HH | 9,000 | 25130968 |
| 618358 | May 3, 2006 | May 3, 2006 | EOG Resources, Inc. | Phillips Unit #1HH | 8,600 | 25130967 |
| 618358Amendment | May 3, 2006 | May 3, 2006 | EOG Resources, Inc. | Phillips Unit #1HH | 8,600 | 25130967 |
| 618212 | May 3, 2006 | May 3, 2006 | EOG Resources, Inc. | Casstevens Unit #8HH | 8,500 | 25130966 |
| 618206 | May 3, 2006 | May 3, 2006 | EOG Resources, Inc. | Casstevens Unit #7HH | 8,500 | 25130965 |
| 618198 | May 3, 2006 | May 3, 2006 | EOG Resources, Inc. | Gorman Unit #2HH | 8,800 | 25130964 |
| 618135 | May 2, 2006 | May 2, 2006 | EOG Resources, Inc. | Trulove Unit #1HH | 8,800 | 25130962 |
| 618135Amendment | May 2, 2006 | May 2, 2006 | EOG Resources, Inc. | Trulove Unit #1HH | 8,800 | 25130962 |
| 618452 | May 1, 2006 | May 1, 2006 | Devon Energy Production Co, L.P. | Larry Woolley #1H | 9,000 | 25130963 |
| 618452Amendment | May 1, 2006 | May 1, 2006 | Devon Energy Production Co, L.P. | Larry Woolley #1H | 9,000 | 25130963 |
| 618405 | Apr 28, 2006 | Apr 28, 2006 | Devon Energy Production Co, L.P. | Shaffer, Harry #1H | 9,000 | 25130961 |
| 618385 | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Poynor Unit #1HH | 11,000 | 25130960 |
| 618385Amendment | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Poynor Unit #1HH | 11,000 | 25130960 |
| 618385Amendment | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Poynor Unit #1HH | 11,000 | 25130960 |
| 618379 | Apr 28, 2006 | Apr 28, 2006 | Devon Energy Production Co, L.P. | Roof Drug #1H | 9,000 | 25130959 |
| 618373 | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Kasal #2HH | 11,000 | 25130958 |
| 618373Amendment | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Kasal #2HH | 11,000 | 25130958 |
| 618368 | Apr 28, 2006 | Apr 28, 2006 | Burlington Resources O & G Co LP | Seals #1HH | 9,000 | 25130957 |
| 618357 | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Faye Shepherd Unit #1HH | 11,500 | 25130956 |
| 618357Amendment | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Poynor Unit #4HH | 12,000 | 25130956 |
| 618357Amendment | Apr 28, 2006 | Apr 28, 2006 | XTO Energy Inc. | Poynor Unit #4HH | 12,000 | 25130956 |
| 618347 | Apr 28, 2006 | Apr 28, 2006 | Chesapeake Operating, Inc. | West Lake #6HH | 9,000 | 25130955 |
| 617956 | Apr 28, 2006 | Apr 28, 2006 | EOG Resources, Inc. | Eagle Ford "B" Unit #4HH | 8,900 | 25130942 |
| 618340 | Apr 27, 2006 | Apr 27, 2006 | EOG Resources, Inc. | Reiter Unit #1HH | 9,000 | 25130954 |
| 618340Amendment | Apr 27, 2006 | Apr 27, 2006 | EOG Resources, Inc. | Reiter Unit #1HH | 9,000 | 25130954 |
| 618288 | Apr 27, 2006 | Apr 27, 2006 | EOG Resources, Inc. | Fleming Trust Unit #1 | 8,800 | 25130952 |
| 618288Amendment | Apr 27, 2006 | Apr 27, 2006 | EOG Resources, Inc. | Fleming Trust Unit #1HH | 8,800 | 25130952 |
| 617953 | Apr 27, 2006 | Apr 27, 2006 | EOG Resources, Inc. | Eagle Ford "B" Unit #1HH | 9,000 | 25130941 |
| 617913 | Apr 27, 2006 | Apr 27, 2006 | Chesapeake Operating, Inc. | Amanda #1HH | 9,000 | 25130936 |
| 618268 | Apr 26, 2006 | Apr 26, 2006 | Chesapeake Operating, Inc. | West Lake #5HH | 9,000 | 25130951 |
| 618260 | Apr 26, 2006 | Apr 26, 2006 | Chesapeake Operating, Inc. | Cooper #7HH | 9,000 | 25130950 |
| 618220 | Apr 26, 2006 | Apr 26, 2006 | Devon Energy Production Co, L.P. | Billy Hickey #2H | 9,000 | 25130948 |
| 618218 | Apr 26, 2006 | Apr 26, 2006 | Devon Energy Production Co, L.P. | Billy Hickey #3H | 9,000 | 25130949 |
| 618207 | Apr 26, 2006 | Apr 26, 2006 | Devon Energy Production Co, L.P. | Kennon, Alfred #1H | 9,000 | 25130947 |
| 618202 | Apr 26, 2006 | Apr 26, 2006 | Chesapeake Operating, Inc. | West Lake #3HH | 9,000 | 25130946 |
| 618202Amendment | Apr 26, 2006 | Apr 26, 2006 | Chesapeake Operating, Inc. | West Lake #3HH | 9,000 | 25130946 |
| 617508 | Apr 26, 2006 | Apr 26, 2006 | XTO Energy Inc. | Boscamp Burton & Lewis #1HH | 11,000 | 25130925 |
| 617508Amendment | Apr 26, 2006 | Apr 26, 2006 | Chesapeake Operating, Inc. | Wicker #1HH | 9,000 | 25130925 |
| 618190 | Apr 25, 2006 | Apr 25, 2006 | XTO Energy Inc. | Fuller #1HH | 11,000 | 25130945 |
| 618189 | Apr 25, 2006 | Apr 25, 2006 | Devon Energy Production Co, L.P. | King Sisters #2H | 9,000 | 25130944 |
| 618104 | Apr 25, 2006 | Apr 25, 2006 | Devon Energy Production Co, L.P. | West Dairies #1H | 9,000 | 25130943 |
| 618051 | Apr 24, 2006 | Apr 24, 2006 | XTO Energy Inc. | Warren Unit #2HH | 11,000 | 25130940 |
| 618051Amendment | Apr 24, 2006 | Apr 24, 2006 | XTO Energy Inc. | Warren Unit #2HH | 11,000 | 25130940 |
| 618049 | Apr 24, 2006 | Apr 24, 2006 | XTO Energy Inc. | Hobdy #1HH | 11,000 | 25130939 |
| 618049Amendment | Apr 24, 2006 | Apr 24, 2006 | XTO Energy Inc. | Hobdy #1HH | 11,000 | 25130939 |
| 618048 | Apr 24, 2006 | Apr 24, 2006 | XTO Energy Inc. | Boscamp Burton & Lewis #2HH | 11,000 | 25130938 |
| 617599 | Apr 21, 2006 | Apr 21, 2006 | EOG Resources, Inc. | Clements Unit #4HH | 7,000 | 25130931 |
| 617917 | Apr 20, 2006 | Apr 20, 2006 | XTO Energy Inc. | Jimenez Unit #2HH | 11,000 | 25130937 |
| 617917Amendment | Apr 20, 2006 | Apr 20, 2006 | XTO Energy Inc. | Jimenez Unit #2HH | 11,000 | 25130937 |
| 617607 | Apr 20, 2006 | Apr 20, 2006 | EOG Resources, Inc. | Double Diamond #5HH | 7,000 | 25130932 |
| 617835 | Apr 19, 2006 | Apr 19, 2006 | Williams Prod. Gulf Coast, L.P. | Shipman #2HH | 8,200 | 25130935 |
| 617726 | Apr 18, 2006 | Apr 18, 2006 | North Texas Llano Operating Corp | Johnston #1H | 9,000 | 25130933 |
| 617454 | Apr 18, 2006 | Apr 18, 2006 | EOG Resources, Inc. | Clements Unit #3HH | 7,000 | 25130930 |
| 617411 | Apr 18, 2006 | Apr 18, 2006 | EOG Resources, Inc. | Clements Unit #2HH | 7,000 | 25130928 |
| 617408 | Apr 18, 2006 | Apr 18, 2006 | EOG Resources, Inc. | Callaway Unit #1HH | 7,000 | 25130927 |
| 617130 | Apr 18, 2006 | Apr 18, 2006 | EOG Resources, Inc. | C.N. Marsh Unit #1HH | 7,000 | 25130916 |
| 617660 | Apr 17, 2006 | Apr 17, 2006 | Devon Energy Production Co, L.P. | Shaw, Robert #1H | 9,000 | 25130929 |
| 617660Amendment | Apr 17, 2006 | Apr 17, 2006 | Devon Energy Production Co, L.P. | Shaw, Robert #1HH | 9,000 | 25130929 |
| 617530 | Apr 13, 2006 | Apr 13, 2006 | EOG Resources, Inc. | Shaw Unit #2RHH | 7,000 | 25130926 |
| 617498 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Winnett Unit #1HH | 10,000 | 25130924 |
| 617498Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Winnett Unit #1HH | 10,000 | 25130924 |
| 617498Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Winnett Unit #1HH | 10,000 | 25130924 |
| 617469 | Apr 12, 2006 | Apr 12, 2006 | Devon Energy Production Co, L.P. | Gary Hollingsworth #1H | 9,000 | 25130923 |
| 617456 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Jimenez Unit #1HH | 11,000 | 25130922 |
| 617456Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Jimenez Unit #1HH | 11,000 | 25130922 |
| 617431 | Apr 12, 2006 | Apr 12, 2006 | Chesapeake Operating, Inc. | Cart Barn #2HH | 9,000 | 25130921 |
| 617338 | Apr 11, 2006 | Apr 11, 2006 | Chesapeake Operating, Inc. | Buffalo Ridge #8HH | 9,000 | 25130920 |
| 617326 | Apr 11, 2006 | Apr 11, 2006 | Devon Energy Production Co, L.P. | Alvin Hagler #1H | 9,000 | 25130919 |
| 617326Amendment | Apr 11, 2006 | Apr 11, 2006 | Devon Energy Production Co, L.P. | Hagler, Alvin #1H | 9,000 | 25130919 |
| 617324 | Apr 11, 2006 | Apr 11, 2006 | Williams Prod. Gulf Coast, L.P. | Collins #2HH | 8,200 | 25130918 |
| 617324Amendment | Apr 11, 2006 | Apr 11, 2006 | Williams Prod. Gulf Coast, L.P. | Collins "a" Unit #2HH | 8,200 | 25130918 |
| 617190 | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Hadley Unit #1HH | 7,000 | 25130917 |
| 617190Amendment | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Hadley Unit #1HH | 7,000 | 25130917 |
| 617054 | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #8HH | 9,100 | 13930489 |
| 617049 | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #7HH | 8,900 | 13930488 |
| 617046 | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #6HH | 9,000 | 13930487 |
| 617044 | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #5HH | 8,900 | 25130911 |
| 617044Amendment | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #5HH | 8,900 | 25130911 |
| 617042 | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #4HH | 8,800 | 25130909 |
| 617042Amendment | Apr 11, 2006 | Apr 11, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #4HH | 8,800 | 25130909 |
| 616945 | Apr 10, 2006 | Apr 10, 2006 | EOG Resources, Inc. | Eagle Ford "C" Unit #5HH | 8,800 | 25130903 |
| 616945Amendment | Apr 10, 2006 | Apr 10, 2006 | EOG Resources, Inc. | Eagle Ford "C" Unit #5HH | 8,800 | 25130903 |
| 616943 | Apr 10, 2006 | Apr 10, 2006 | EOG Resources, Inc. | Eagle Ford "C" Unit #4HH | 8,800 | 25130904 |
| 616941 | Apr 10, 2006 | Apr 10, 2006 | EOG Resources, Inc. | Eagle Ford "C" Unit #3HH | 8,800 | 25130901 |
| 616941Amendment | Apr 10, 2006 | Apr 10, 2006 | EOG Resources, Inc. | Eagle Ford "C" Unit #3HH | 8,800 | 25130901 |
| 617214 | Apr 7, 2006 | Apr 7, 2006 | Chesapeake Operating, Inc. | Tucker #2HH | 9,000 | 25130915 |