期刊
CHINA GEOLOGY
卷 5, 期 2, 页码 345-354出版社
KEAI PUBLISHING LTD
DOI: 10.31035/cg2022014
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
资金
- National Natural Science Foundation of China [42006181, 42176212, 41976205, 41876051]
- Youth Foundation of Natural Science Foundation of Shandong Province [ZR2020QE109]
- National Key Research and Development Project [2018YFE0126400]
- Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao) [2021QNLM020002]
This study reviews the formation mechanisms of grain-displacing hydrate from the perspective of geological accumulation and microscale sedimentary property, and proposes shortcomings in current theories and suggestions for future study.
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. (C) 2022 China Geology Editorial Office.
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