Marine Gas Hydrate System: State of the Art

Abstract

Abstract:

Based on the summary of research progress on gas sources and formation mechanisms, geophysical and geochemical proxies, formation environments and geological models, distribution of marine gas hydrate, this paper points out and discusses the direction and scientific issues for formation mechanism research of marine gas hydrate in China.Many scientific data and samples such as the wire-line logging, in-situ temperature, properties, geochemical data and sediment cores, pore water, head space and void gas, microbiology samples, etc,were obtained through the gas hydrate drilling expedition in Shenhu area of the north slope of South China Sea in April-June 2007. So,Shenhu area is an ideal area for the research on formation mechanism and distribution pattern of marine gas hydrate. Focusing on the material basis, formation environment and process, responding index and formation system of gas hydrate, a series of research in the light of the interaction between gas, water, sediment and gas hydrate, geophysical and geochemical responding mechanism, coupling control of different conditions for gas hydrate formation should be carried out on the north slope of South China Sea.

Key words: gas hydrate system, formation mechanism, geophysical and geochemical proxy, accumulation model

CLC Number:

P744.4

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