| 622093 | Jul 7, 2006 | Jul 7, 2006 | EOG Resources, Inc. | Beil Unit #3HH | 7,000 | 25131058 |
| 622073 | Jul 6, 2006 | Jul 6, 2006 | Chesapeake Operating, Inc. | Burton #1HH | 9,000 | 25131057 |
| 622057 | Jul 6, 2006 | Jul 6, 2006 | Aspect Energy, LLC | Vinewood #1HH | 7,800 | 25131056 |
| 622021 | Jul 5, 2006 | Jul 5, 2006 | North Texas Llano Operating Corp | Bednarz #1HH | 9,000 | 25131055 |
| 622021Amendment | Jul 5, 2006 | Jul 5, 2006 | North Texas Llano Operating Corp | Bednarz #1HH | 9,000 | 25131055 |
| 621786 | Jul 5, 2006 | Jul 5, 2006 | EOG Resources, Inc. | Barron Unit #2HH | 8,800 | 25131052 |
| 621770 | Jul 5, 2006 | Jul 5, 2006 | EOG Resources, Inc. | Barron Unit #1HH | 8,100 | 25131051 |
| 621970 | Jul 3, 2006 | Jul 3, 2006 | Grand Operating, Inc. | Learmont #1HH | 8,000 | 25131054 |
| 621851 | Jun 30, 2006 | Jun 30, 2006 | Devon Energy Production Co, L.P. | Richard Doyle #1H | 9,000 | 25131053 |
| 621626 | Jun 30, 2006 | Jun 30, 2006 | EOG Resources, Inc. | Lowrance C Unit #2HH | 8,900 | 25131046 |
| 621783 | Jun 29, 2006 | Jun 29, 2006 | Devon Energy Production Co, L.P. | Sue Mahaffey #5H | 9,000 | 25131050 |
| 621775 | Jun 29, 2006 | Jun 29, 2006 | Devon Energy Production Co, L.P. | Sue Mahaffey #3H | 9,000 | 25131048 |
| 621775Amendment | Jun 29, 2006 | Jun 29, 2006 | Devon Energy Production Co, L.P. | Sue Mahaffey #3H | 9,000 | 25131048 |
| 621771 | Jun 29, 2006 | Jun 29, 2006 | Devon Energy Production Co, L.P. | Sue Mahaffey #2H | 9,000 | 25131049 |
| 621624 | Jun 29, 2006 | Jun 29, 2006 | EOG Resources, Inc. | Phillips Unit #2HH | 8,600 | 25131045 |
| 618300 | Jun 29, 2006 | Jun 29, 2006 | Twjm Services, GP, LLC | Grandview SWD #1 | 12,000 | 25130953 |
| 621754 | Jun 28, 2006 | Jun 28, 2006 | Devon Energy Production Co, L.P. | Uysaler, Ahmet #2HH | 9,000 | 25131047 |
| 621754Amendment | Jun 28, 2006 | Jun 28, 2006 | Devon Energy Production Co, L.P. | Uysaler, Ahmet #2HH | 9,000 | 25131047 |
| 621530 | Jun 23, 2006 | Jun 23, 2006 | Devon Energy Production Co, L.P. | Danny Harlow #1H | 9,000 | 25131044 |
| 621524 | Jun 23, 2006 | Jun 23, 2006 | J-W Operating Co. | Robinson, Thelma #1HH | 14,000 | 25131043 |
| 621486 | Jun 23, 2006 | Jun 23, 2006 | Chesapeake Operating, Inc. | Childress #6HH | 9,000 | 25131042 |
| 621409 | Jun 22, 2006 | Jun 22, 2006 | EOG Resources, Inc. | KTV Caddo Unit #1HH | 7,000 | 25131041 |
| 621400 | Jun 22, 2006 | Jun 22, 2006 | Chesapeake Operating, Inc. | Childress #13HH | 9,000 | 25131040 |
| 621400Amendment | Jun 22, 2006 | Jun 22, 2006 | Chesapeake Operating, Inc. | Childress #13HH | 9,000 | 25131040 |
| 621398 | Jun 22, 2006 | Jun 22, 2006 | Chesapeake Operating, Inc. | Childress #7HH | 9,000 | 25131039 |
| 621392 | Jun 22, 2006 | Jun 22, 2006 | Chesapeake Operating, Inc. | Childress #5HH | 9,000 | 25131038 |
| 621389 | Jun 22, 2006 | Jun 22, 2006 | Chesapeake Operating, Inc. | Mize Family #43HH | 9,000 | 25131036 |
| 621331 | Jun 22, 2006 | Jun 22, 2006 | Chesapeake Operating, Inc. | Cooper #9HH | 9,000 | 25131037 |
| 621328 | Jun 21, 2006 | Jun 21, 2006 | Chesapeake Operating, Inc. | Cooper #8HH | 9,000 | 25131035 |
| 621235 | Jun 19, 2006 | Jun 19, 2006 | Joint Resources Company | Akins #1HH | 8,900 | 25131034 |
| 621193 | Jun 19, 2006 | Jun 19, 2006 | Chesapeake Operating, Inc. | Cardenas #1HH | 9,000 | 25131033 |
| 621192 | Jun 19, 2006 | Jun 19, 2006 | Chesapeake Operating, Inc. | Goex #6HH | 9,000 | 25131032 |
| 621191 | Jun 19, 2006 | Jun 19, 2006 | Chesapeake Operating, Inc. | Goex #2HH | 9,000 | 25131031 |
| 621134 | Jun 19, 2006 | Jun 19, 2006 | Quicksilver Resources Inc. | Gumble, Barney #1HH | 6,400 | 25131030 |
| 621134Amendment | Jun 19, 2006 | Jun 19, 2006 | Quicksilver Resources Inc. | Gumble, Barney #1HH | 6,400 | 25131030 |
| 620937 | Jun 19, 2006 | Jun 19, 2006 | EOG Resources, Inc. | George Unit #1HH | 7,000 | 25131028 |
| 621107 | Jun 16, 2006 | Jun 16, 2006 | Chesapeake Operating, Inc. | Wasilchak #2HH | 9,000 | 25131029 |
| 620920 | Jun 13, 2006 | Jun 13, 2006 | Devon Energy Production Co, L.P. | James Elrod #1H | 9,000 | 25131027 |
| 620898 | Jun 13, 2006 | Jun 13, 2006 | Devon Energy Production Co, L.P. | Mahaffey, Sue #4H | 9,000 | 25131026 |
| 620706 | Jun 13, 2006 | Jun 13, 2006 | EOG Resources, Inc. | Geren #12HH | 7,000 | 25131025 |
| 620657 | Jun 13, 2006 | Jun 13, 2006 | EOG Resources, Inc. | County Line Unit #1HH | 9,000 | 25131024 |
| 620697 | Jun 9, 2006 | Jun 9, 2006 | XTO Energy Inc. | Fortson Burton Kirkland Unit #A 1HH | 11,000 | 25131022 |
| 620697Amendment | Jun 9, 2006 | Jun 9, 2006 | XTO Energy Inc. | Forston Burton Kirkland Unit #A 1HH | 11,000 | 25131022 |
| 620697Amendment | Jun 9, 2006 | Jun 9, 2006 | XTO Energy Inc. | Forston Burton Kirkland Unit #A 1HH | 11,000 | 25131022 |
| 620545 | Jun 9, 2006 | Jun 9, 2006 | Devon Energy Production Co, L.P. | Juanita Eberhart #1H | 9,000 | 25131023 |
| 620545Amendment | Jun 9, 2006 | Jun 9, 2006 | Devon Energy Production Co, L.P. | Juanita Eberhart #1H | 9,000 | 25131023 |
| 620545Amendment | Jun 9, 2006 | Jun 9, 2006 | Devon Energy Production Co, L.P. | Juanita Eberhart #1H | 9,000 | 25131023 |
| 620629 | Jun 8, 2006 | Jun 8, 2006 | Coastal Plains Energy, Inc. | Alvarado (SWD) #1 | 12,000 | 25131021 |
| 620565 | Jun 7, 2006 | Jun 7, 2006 | Young, Marshall R., Oil Co. | Vortex SWD #1 | 11,500 | 25131020 |
| 620565Amendment | Jun 7, 2006 | Jun 7, 2006 | Young, Marshall R., Oil Co. | Vortex SWD #1 | 11,500 | 25131020 |
| 620551 | Jun 7, 2006 | Jun 7, 2006 | Williams Prod. Gulf Coast, L.P. | Bill Brown #2HH | 8,500 | 25131019 |
| 620469 | Jun 7, 2006 | Jun 7, 2006 | EOG Resources, Inc. | Roden Unit #1HH | 7,000 | 25131018 |
| 620469Amendment | Jun 7, 2006 | Jun 7, 2006 | EOG Resources, Inc. | Roden Unit #1HH | 7,000 | 25131018 |
| 619099 | Jun 6, 2006 | Jun 6, 2006 | EOG Resources, Inc. | Ezell Unit #1HH | 8,500 | 25130982 |
| 620441 | Jun 5, 2006 | Jun 5, 2006 | Chesapeake Operating, Inc. | Preston #1HH | 9,000 | 25131017 |
| 620404 | Jun 5, 2006 | Jun 5, 2006 | Sullivan, Hollis R. Inc. | Marti #1HH | 8,500 | 25131016 |
| 620388 | Jun 5, 2006 | Jun 5, 2006 | XTO Energy Inc. | Davidson Unit #1HH | 11,000 | 25131015 |
| 620235 | Jun 1, 2006 | Jun 1, 2006 | Devon Energy Production Co, L.P. | Charles Davis #1H | 9,000 | 25131014 |
| 620204 | Jun 1, 2006 | Jun 1, 2006 | Chesapeake Operating, Inc. | Robinson Branch #3HH | 9,000 | 25131012 |
| 620032 | Jun 1, 2006 | Jun 1, 2006 | Stroud Energy, Ltd. | Wardlay #1HH | 8,800 | 25131004 |
| 620032Amendment | Jun 1, 2006 | Jun 1, 2006 | Range Production Company | Wardlay #1HH | 8,800 | 25131004 |
| 620032Amendment | Jun 1, 2006 | Jun 1, 2006 | Range Production Company | Wardlay #1HH | 8,800 | 25131004 |
| 619898 | Jun 1, 2006 | Jun 1, 2006 | EOG Resources, Inc. | Bontke Unit #1HH | 9,000 | 13930490 |
| 619797 | Jun 1, 2006 | Jun 1, 2006 | EOG Resources, Inc. | Carrell #1HH | 7,000 | 25131003 |
| 619797Amendment | Jun 1, 2006 | Jun 1, 2006 | EOG Resources, Inc. | Carrell Unit #1HH | 7,000 | 25131003 |
| 619774 | Jun 1, 2006 | Jun 1, 2006 | EOG Resources, Inc. | Clements Unit #6HH | 7,000 | 25131005 |
| 619774Amendment | Jun 1, 2006 | Jun 1, 2006 | EOG Resources, Inc. | Clements Unit #6HH | 7,000 | 25131005 |
| 620215 | May 31, 2006 | May 31, 2006 | Chesapeake Operating, Inc. | Clear Creek #2HH | 9,000 | 25131013 |
| 620186 | May 31, 2006 | May 31, 2006 | Chesapeake Operating, Inc. | White Wing Coachman "A" #2HH | 9,000 | 25131011 |
| 620182 | May 31, 2006 | May 31, 2006 | Chesapeake Operating, Inc. | Clear Creek #4HH | 9,000 | 25131010 |
| 620180 | May 31, 2006 | May 31, 2006 | Chesapeake Operating, Inc. | Clear Creek #3HH | 9,000 | 25131009 |
| 620126 | May 31, 2006 | May 31, 2006 | Chesapeake Operating, Inc. | White Wing Coachman "A" #3HH | 9,000 | 25131008 |
| 618378 | May 31, 2006 | May 31, 2006 | EOG Resources, Inc. | Leonard Unit #3HH | 8,900 | 25130969 |
| 620074 | May 30, 2006 | May 30, 2006 | XTO Energy Inc. | Kyrish #1HH | 11,000 | 25131006 |
| 619677 | May 26, 2006 | May 26, 2006 | EOG Resources, Inc. | Set/Back "a" Unit #3HH | 8,500 | 25130999 |
| 619930 | May 25, 2006 | May 25, 2006 | Burnett Oil Co., Inc. | Lintner West #2HH | 9,000 | 25131002 |
| 619890 | May 25, 2006 | May 25, 2006 | Devon Energy Production Co, L.P. | Hockett, Dale #1H | 9,000 | 25131001 |
| 619890Amendment | May 25, 2006 | May 25, 2006 | Devon Energy Production Co, L.P. | Hockett, Dale #1H | 9,000 | 25131001 |
| 619877 | May 25, 2006 | May 25, 2006 | Chesapeake Operating, Inc. | Sandlin-Heritage #2HH | 9,000 | 25131000 |
| 619877Amendment | May 25, 2006 | May 25, 2006 | Chesapeake Operating, Inc. | Sandlin-Heritage #2HH | 9,000 | 25131000 |
| 619820 | May 24, 2006 | May 24, 2006 | XTO Energy Inc. | Clayton #1HH | 11,000 | 25130998 |
| 619820Amendment | May 24, 2006 | May 24, 2006 | XTO Energy Inc. | Clayton #1HH | 11,000 | 25130998 |
| 619496 | May 24, 2006 | May 24, 2006 | Stroud Energy, Ltd. | Wall #1HH | 8,500 | 25130997 |
| 619704 | May 23, 2006 | May 23, 2006 | XTO Energy Inc. | Boscamp Burton & Lewis #3HH | 11,000 | 25130996 |
| 619661 | May 22, 2006 | May 22, 2006 | Chesapeake Operating, Inc. | Kathy #1HH | 9,000 | 25130995 |
| 619241 | May 22, 2006 | May 22, 2006 | EOG Resources, Inc. | Fleming Trust Unit #2HH | 8,800 | 25130992 |
| 619321 | May 19, 2006 | May 19, 2006 | EOG Resources, Inc. | V.L. Carrell Unit #1HH | 7,000 | 25130993 |
| 619321Amendment | May 19, 2006 | May 19, 2006 | EOG Resources, Inc. | V. L. Carrell Unit #1HH | 7,000 | 25130993 |
| 619478 | May 18, 2006 | May 18, 2006 | Tsar Operating Company | Mustang Creek #3 | 6,400 | 25130994 |
| 619184 | May 18, 2006 | May 18, 2006 | EOG Resources, Inc. | U.S. Lime #8HH | 7,000 | 25130990 |
| 619178 | May 18, 2006 | May 18, 2006 | EOG Resources, Inc. | U.S. Lime #7HH | 7,000 | 25130989 |
| 619330 | May 16, 2006 | May 16, 2006 | Devon Energy Production Co, L.P. | Dean "A" #1H | 9,000 | 25130991 |
| 619249 | May 15, 2006 | May 15, 2006 | Devon Energy Production Co, L.P. | Brubaker, Abner #1H | 9,000 | 25130988 |
| 618825 | May 15, 2006 | May 15, 2006 | EOG Resources, Inc. | Brown Unit #2HH | 7,000 | 25130978 |
| 618772 | May 15, 2006 | May 15, 2006 | EOG Resources, Inc. | Luttrell Unit #3HH | 8,500 | 25130977 |
| 618772Amendment | May 15, 2006 | May 15, 2006 | EOG Resources, Inc. | Luttrell Unit #3HH | 8,500 | 25130977 |
| 619216 | May 12, 2006 | May 12, 2006 | Chesapeake Operating, Inc. | E Brown #3HH | 9,000 | 25130987 |
| 619214 | May 12, 2006 | May 12, 2006 | Chesapeake Operating, Inc. | Falvel #9HH | 9,000 | 25130986 |
| 619214Amendment | May 12, 2006 | May 12, 2006 | Chesapeake Operating, Inc. | Falvel #9HH | 9,000 | 25130986 |
| 619141 | May 12, 2006 | May 12, 2006 | EOG Resources, Inc. | Hardcastle Unit #3HH | 7,000 | 25130985 |