| | 
| (1) | Excludes
capitalized interest on unproved properties of $2.9 million, $2.9 million and
$5.8 million for the years ended December 31, 2003, 2004 and 2005, respectively,
and includes capitalized overhead of $1.4 million, $1.7 million and $2.1 million
for the years ended December 31, 2003, 2004 and 2005, respectively. The table
also includes non-cash asset retirement obligations of $0.7 million, $0.5 million
and $1.8 million for the years ended December 31, 2003, 2004 and 2005, respectively. |
Oil
And Natural Gas Reserves Proved reserves are estimated
quantities of oil and natural gas which geological and engineering data demonstrate
with reasonable certainty to be recoverable in future years from known reservoirs
under existing economic and operating conditions. Proved developed reserves are
proved reserves that can reasonably be expected to be recovered through existing
wells with existing equipment and operating methods. Proved
oil and natural gas reserve quantities at December 31, 2003, 2004 and 2005, and
the related discounted future net cash flows before income taxes are based on
estimates prepared by Ryder Scott Company, DeGolyer and MacNaughton and Fairchild
& Wells, Inc., independent petroleum engineers. Such estimates have been prepared
in accordance with guidelines established by the Securities and Exchange Commission.
The Company's net ownership interests in estimated
quantities of proved oil and natural gas reserves and changes in net proved reserves,
all of which are located in the continental United States, are summarized below: 
| |
