4Q2010 – 1Q2011 Semi-Annual Progress Report Thirty-Third and Thirty-Fourth Quarterly Report: October 2010 – March 2011 Resource Characterization and Quantification of Natural Gas Hydrate and Associated Free-Gas Accumulations in the Prudhoe Bay – Kuparuk R

Oil and Natural Gas Technology Cooperative Research Agreement Award Number DE-FC-01NT41332 4Q2010 – 1Q2011 Semi-Annual Progress Report Thirty-Third and Thirty-Fourth Quarterly Report: October 2010 – March 2011 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 (ASRC Energy Services) with Stephen Lewis (Principal Investigator) P.O. Box 196612 Anchorage, Alaska 99519-6612 Prepared for: United States Department of Energy National Energy Technology Laboratory May 26, 2011