Whiting Petroleum Updates Production Outlook

Whiting Petroleum estimates that approximately 14 million cubic feet equivalent (MMcfe) per day of operated production and approximately 10 MMcfe per day of non-operated production has been shut-in for approximately four days (a total of approximately 100 MMcfe) due to Hurricane Rita. Therefore, Whiting is revising its third quarter and full-year 2005 production guidance. Whiting now expects third quarter production to range from 17.6 billion cubic feet equivalent (Bcfe) to 17.9 Bcfe, compared to 17.7 Bcfe to 18.0 Bcfe in its prior guidance, and full-year 2005 production to range from 72.9 Bcfe to 73.9 Bcfe, compared to 73.0 Bcfe to 74.0 Bcfe in its prior guidance.