Chesapeake’s 2007 fourth quarter production of 204.2 billion cubic feet of natural gas equivalent (bcfe) was comprised of 187.8 billion cubic feet of natural gas (bcf) and 2.74 million barrels of oil and natural gas liquids (mmbbls). Chesapeake’s average daily production for the quarter of 2.22bcfe consisted of 2.04bcf of natural gas and 29,728 barrels of oil and natural gas liquids (bbls).

Chesapeake’s daily production for the 2007 full year averaged 1.96bcfe, an increase of 23% over the 1.58bcfe of daily production for the 2006 full year.

Chesapeake’s 2007 full-year production of 714.3bcfe was comprised of 655bcf and 9.88mmbbls. Chesapeake’s average daily production for the 2007 full year of 1.96bcfe consisted of 1.79bcf and 27,074bbls. The company’s growth rate for its 2007 full-year natural gas production was 24% and its growth rate for 2007 full-year oil production was 14%.