| divested | 515948 | 42-479-37997 | DRILL | BRUNI-SUMMERS | WEBB | 2001-12-07 | to: ARETE OPERATING COMPANY III LLC |
| divested | 514171 | 42-479-37959 | DRILL | MAYERS | WEBB | 2001-10-03 | to: ARETE OPERATING COMPANY LLC |
| divested | 513954 | 42-479-37951 | DRILL | GJM GAS UNIT I | WEBB | 2001-09-26 | to: ARETE OPERATING COMPANY III LLC |
| divested | 513817 | 42-505-34422 | DRILL | HEIN, A. O. | ZAPATA | 2001-09-21 | to: ARETE OPERATING COMPANY LLC |
| divested | 513779 | 42-479-37946 | DRILL | GJM GAS UNIT II | WEBB | 2001-09-20 | to: CALPINE NATURAL GAS L.P. |
| divested | 513613 | 42-479-37944 | DRILL | GILL, F. J. | WEBB | 2001-09-14 | to: ARETE OPERATING COMPANY LLC |
| divested | 513407 | 42-479-37937 | DRILL | GJM GAS UNIT I | WEBB | 2001-09-06 | to: ARETE OPERATING COMPANY III LLC |
| divested | 512670 | 42-479-37920 | DRILL | VOLZ-MARTIN | WEBB | 2001-08-16 | to: ARETE OPERATING COMPANY III LLC |
| divested | 512569 | 42-479-37914 | DRILL | VOLZ-MARTIN | WEBB | 2001-08-14 | to: ARETE OPERATING COMPANY II LLC |
| divested | 512470 | 42-479-37912 | DRILL | ROTTERSMAN | WEBB | 2001-08-10 | to: ARETE OPERATING COMPANY II LLC |
| divested | 512470 | 42-479-37912 | DRILL | ROTTERSMAN | WEBB | 2001-08-10 | to: ARETE OPERATING COMPANY II LLC |
| divested | 512433 | 42-479-37910 | DRILL | MAYERS | WEBB | 2001-08-09 | to: ARETE OPERATING COMPANY LLC |
| divested | 512384 | 42-479-37904 | DRILL | E. G. RANCH | WEBB | 2001-08-08 | to: CALPINE NATURAL GAS COMPANY |
| divested | 512295 | 42-479-37903 | DRILL | SOUTH CALLAGHAN RANCH | WEBB | 2001-08-06 | to: MICHAEL PETROLEUM CORPORATION |
| divested | 512239 | 42-479-37900 | DRILL | G. & F. RAMIREZ GAS UNIT | WEBB | 2001-08-03 | to: ARETE OPERATING COMPANY III LLC |
| divested | 511823 | 42-479-37888 | DRILL | MAYERS | WEBB | 2001-07-24 | to: ARETE OPERATING COMPANY III LLC |
| divested | 511824 | 42-479-37887 | DRILL | MARTIN, SOPHIE J. | WEBB | 2001-07-24 | to: ARETE OPERATING COMPANY II LLC |
| divested | 511334 | 42-479-37876 | DRILL | MARTIN, J. C. | WEBB | 2001-07-11 | to: ARETE OPERATING COMPANY III LLC |
| divested | 510777 | 42-479-37865 | DRILL | BRUNI-SUMMERS | WEBB | 2001-06-26 | to: ARETE OPERATING COMPANY III LLC |
| divested | 510650 | 42-479-37861 | DRILL | VOLZ-MARTIN | WEBB | 2001-06-22 | to: ARETE OPERATING COMPANY III LLC |
| divested | 510146 | 42-479-37849 | DRILL | VOLZ-MARTIN | WEBB | 2001-06-11 | to: ARETE OPERATING COMPANY III LLC |
| divested | 509859 | 42-479-36012 | RECOMP | MARTIN, SOPHIE J. "B" | WEBB | 2001-06-05 | to: ARETE OPERATING COMPANY II LLC |
| divested | 509689 | 42-479-37835 | DRILL | VILLARREAL | WEBB | 2001-05-31 | to: MIDWEST OPERATING LLC |
| divested | 509689 | 42-479-37835 | DRILL | VILLARREAL | WEBB | 2001-05-31 | to: MIDWEST OPERATING LLC |
| divested | 509123 | 42-479-37820 | DRILL | SOUTH CALLAGHAN RANCH | WEBB | 2001-05-17 | to: ALDINE OIL AND GAS LP |
| divested | 508360 | 42-479-37795 | DRILL | GILL, F. J. | WEBB | 2001-04-30 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 507639 | 42-479-37777 | DRILL | VILLARREAL | WEBB | 2001-04-10 | to: MIDWEST OPERATING LLC |
| divested | 507638 | 42-479-37776 | DRILL | BRUNI-SUMMERS | WEBB | 2001-04-10 | to: ARETE OPERATING COMPANY III LLC |
| divested | 507034 | 42-505-34323 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2001-03-26 | to: CALPINE NATURAL GAS L.P. |
| divested | 507037 | 42-479-37765 | DRILL | M.M.A. CATTLE CO. | WEBB | 2001-03-26 | to: ARETE OPERATING COMPANY LLC |
| divested | 507035 | 42-479-37766 | DRILL | BRUNI-SUMMERS | WEBB | 2001-03-26 | to: ARETE OPERATING COMPANY III LLC |
| divested | 505639 | 42-505-34299 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2001-02-21 | to: ARETE OPERATING COMPANY II LLC |
| divested | 505639 | 42-505-34299 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2001-02-21 | to: ARETE OPERATING COMPANY II LLC |
| divested | 505566 | 42-479-37747 | DRILL | ROTTERSMAN | WEBB | 2001-02-20 | to: ARETE OPERATING COMPANY II LLC |
| divested | 505211 | 42-505-34295 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2001-02-12 | to: CALPINE NATURAL GAS L.P. |
| divested | 505042 | 42-479-37737 | DRILL | MARTIN, S. J. | WEBB | 2001-02-07 | to: ARETE OPERATING COMPANY III LLC |
| divested | 504701 | 42-479-37724 | DRILL | ROTTERSMAN | WEBB | 2001-01-30 | to: ARETE OPERATING COMPANY III LLC |
| divested | 504676 | 42-479-37723 | DRILL | MARTIN, S. J. | WEBB | 2001-01-29 | to: ARETE OPERATING COMPANY III LLC |
| divested | 504593 | 42-479-37722 | DRILL | E. G. RANCH | WEBB | 2001-01-26 | to: CALPINE NATURAL GAS L.P. |
| divested | 504593 | 42-479-37722 | DRILL | E. G. RANCH | WEBB | 2001-01-26 | to: CALPINE NATURAL GAS L.P. |
| divested | 504542 | 42-479-37591 | RECOMP | SANTOS | WEBB | 2001-01-25 | to: ARETE OPERATING COMPANY III LLC |
| divested | 503750 | 42-505-34273 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2001-01-05 | to: ARETE OPERATING COMPANY II LLC |
| divested | 503751 | 42-479-37703 | DRILL | GILL, F. J. | WEBB | 2001-01-05 | to: ARETE OPERATING COMPANY LLC |
| divested | 503750 | 42-505-34273 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2001-01-05 | to: ARETE OPERATING COMPANY II LLC |
| divested | 503751 | 42-479-37703 | DRILL | GILL, F. J. | WEBB | 2001-01-05 | to: ARETE OPERATING COMPANY LLC |
| divested | 503318 | 42-505-34265 | DRILL | HEIN, LUZ A. | ZAPATA | 2000-12-20 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 502884 | 42-479-37688 | DRILL | HIRSCH ESTATE | WEBB | 2000-12-11 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 502239 | 42-479-37668 | DRILL | HEIN, LUZ A. ESTATE | WEBB | 2000-11-21 | to: ARETE OPERATING COMPANY II LLC |
| divested | 502242 | 42-479-37667 | DRILL | SUMMERS, BRUNI | WEBB | 2000-11-21 | to: ARETE OPERATING COMPANY III LLC |
| divested | 499978 | 42-505-34222 | DRILL | BRUNI MINERAL TRUST | ZAPATA | 2000-09-22 | to: ARETE OPERATING COMPANY II LLC |