4Q2008 – 1Q2009 Semi-Annual Progress Report Twenty-Fifth and Twenty-sixth Quarterly Report: October 2008 – March 2009 Resource Characterization and Quantification of Natural Gas Hydrate and Associated Free-Gas Accumulations in the Prudhoe Bay – Kuparuk Ri

Oil and Natural Gas Technology Cooperative Research Agreement (CRA) Award Number DE-FC-01NT41332 4Q2008 – 1Q2009 Semi-Annual Progress Report Twenty-Fifth and Twenty-sixth Quarterly Report: October 2008 – March 2009 Resource Characterization and Quantification of Natural Gas Hydrate and Associated Free-Gas Accumulations in the Prudhoe Bay – Kuparuk River Area on the North Slope of Alaska Submitted by: BP Exploration (Alaska), Inc. (BPXA) Robert Hunter (Principal Investigator) P.O. Box 196612 Anchorage, Alaska 99519-6612 Prepared for: United States Department of Energy (DOE) National Energy Technology Laboratory (NETL) May 6, 2009