1Q2007 QuarterlyProgress Report Eighteenth Quarterly Report: January 2007 – March 2007 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

Oil and Natural Gas Technology DOE-BPXA Cooperative Agreement Award Number DE-FC-01NT41332 1Q2007 QuarterlyProgress Report Eighteenth Quarterly Report: January 2007 – March 2007 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. Robert Hunter (Principal Investigator) P.O. Box 196612 Anchorage, Alaska 99519-6612 Prepared for: United States Department of Energy National Energy Technology Laboratory June 27, 2007