4Q2012 – 1Q2013 Semi-Annual Progress Report Forty-First and Forty-Second Quarterly Reports: October 2012 – March 2013 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 Award Number DE-FC-01NT41332 4Q2012 – 1Q2013 Semi-Annual Progress Report Forty-First and Forty-Second Quarterly Reports: October 2012 – March 2013 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 (Weston Solutions) with Scott Digert (Principal Investigator) P.O. Box 196612 Anchorage, Alaska 99519-6612 Prepared for: United States Department of Energy National Energy Technology Laboratory April 30, 2013