Formation mechanism,experimental method,and property characterization of graindisplacing methane hydrates in marine sediment:A review  

作　　者：Yong-chao Zhang Le-le Liu Gao-wei Hu Qing-tao Bu Cheng-feng Li Zheng-cai Zhang Jian-ye Sun Chang-ling Liu 

机构地区：[1]The Key Laboratory of Gas Hydrate,Qingdao Institute of Marine Geology,China Geological Survey,Ministry of Natural Resources,Qingdao 266237,China [2]Laboratory for Marine Mineral Resources,Pilot National Laboratory for Marine Science and Technology,Qingdao 266237,China

出　　处：《China Geology》2022年第2期345-354,共10页中国地质（英文）

基　　金：supported by the National Natural Science Foundation of China(42006181,42176212,41976205,41876051);the Youth Foundation of Natural Science Foundation of Shandong Province(ZR2020QE109);the National Key Research and Development Project(2018YFE0126400);the Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(Qingdao)(2021QNLM020002).

摘　　要：Grain-displacing hydrate deposits exist at many marine sites,which constitute an important part of methane hydrate resources worldwide.Attributed to the difficulties in acquiring field data and synthesizing experimental samples,the formation and property characterization of grain-displacing hydrate remains less understood and characterized than the pore-filling hydrate in current literature.This study reviews the formation mechanisms of grain-displacing hydrate from the perspective of geological accumulation and microscale sedimentary property.The experimental methods of synthesizing grain-displacing hydrate in the laboratory and the current knowledge on the property of grain-displacing hydrate sediment are also introduced.Shortcomings in current theories and suggestions for future study are proposed.The work is hoped to provide valuable insights for the research into the hydrate accumulation,geophysics,and hydrate exploitation targeted at the grain-displacing hydrate in the marine sediments.

关 键 词：Methane hydrates Formation mechanism Grain-displacing hydrate Pore-filling hydrate Synthesis method Sedimentary property Oil and gas exploration engineering NGHs exploration trial engineering 

分 类 号：P618.13[天文地球—矿床学]