Anadarko Basin Gross 3-D Square Miles               2,204 Net Proved Reserves (Bcfe)              52 PV 10% Value ($MM)                 $ 184 Texas Gulf Coast Gross 3-D Square Miles              3,992 Net Proved Reserves (Bcfe)             76 PV 10% Value ($MM)                $ 314 West Texas Gross 3-D Square Miles              4,514 Net Proved Reserves (Bcfe)               5 PV 10% Value ($MM)                  $ 22 Gross 3-D square miles as of May 18, 2006 Net proved reserves as of May 18, 2006 PV 10% as of May 18, 2006