Laboratory of Petroleum Resources and Prospecting University of Petroleum(Beijing) 102249;
College of Geosciences University of Petroleum(Beijing) 102249;
CNOOC International Limited 100029;
School of Earth&Space Sciences University 100871;
Research Institute of Petroleum Exploration and Development Company Limited 100083;
Resource evaluation; Natural gas hydrates; The South China Sea; Volumetric method; Trend-analysis method;