Gas hydrates distribution in the Shenhu Area, northern South China Sea : comparisons between the eight drilling sites with gas-hydrate petroleum system - Su, M. (Chinese Academy of Sciences. Guangzhou Key Laboratory of New and Renewable Energy Research and Development) ; Wang, H. (Guangzhou Marine Geological Survey (Guangzhou, Xina)) ; Sha, Z. (Guangzhou Marine Geological Survey (Guangzhou, Xina)) ; Liang, J. (Guangzhou Marine Geological Survey (Guangzhou, Xina)) ; Wu, N. (Ministry of Land and Resources (Qindao Shandong, Xina). Key Laboratory of Gas Hydrate) ; Qiao, S. (Chinese Academy of Sciences. Guangzhou Key Laboratory of New and Renewable Energy Research and Development) ; Cong, X. (Chinese Academy of Sciences. Guangzhou Key Laboratory of New and Renewable Energy Research and Development) ; Yang, R. (Chinese Academy of Sciences. Guangzhou Key Laboratory of New and Renewable Energy Research and Development)