Key Data

• Well-situated in key U.S. basins.
• Focused on unconventional and low-risk conventional programs.
• 90-95 percent of capital targeted toward domestic programs.
• 3.4 trillion cubic feet equivalent (Tcfe) proved reserves, including our 48.8 percent interest in Four Star Oil & Gas Company (Four Star). Proved reserves rose by 22 percent from 2009.
• 6.7 Tcfe risked unproved inventory with upside potential.
• $1.40 per thousand cubic feet equivalent (Mcfe) domestic reserve replacement costs compared with $2.04 per Mcfe for 2009.
• 247 percent total company reserve replacement ratio.
• Full year 2010 production, including our interest in Four Star, averaged 782 million cubic feet equivalent per day.

*Cautionary Statement Regarding Forward-looking Statements