Guangzhou Marine Geological Survey Geological Survey of Natural Resources 510760;
Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) 511458;
Institution of Oceanology Academy of Sciences 266071;
Natural gas hydrates(NGHs); Methane hydrate; P-wave velocity; POROSITY; SATURATION; Pressure-core; NGHs exploration trial engineering; Oil and gas exploration engineering; Shenhu Area; South China Sea;