Marine natural gas hydrate(NGH)is widely accepted to be a promising clean energy resource,and its safe and effective production is of great significance.However,the marine NGH reservoirs are usually characterized by non-diagenesis,extremely weak consolidation,and shallow burial.The reservoir is faced with a strong multi-field coupling state during the extraction of natural gas from NGH reservoirs.Uncovering these multi-field coupling mech-anisms is essential for productivity prediction,risk prediction,and control.The current study proposed a fundamen-tal multi-field coupling mode,considering the geological background of the NGH reservoirs in the South China Sea and the geological background of depressurization.A comprehensive review of NGH phase change and mass trans-fer,heat transfer,reservoir deformation,and multi-field coupling methods is conducted.Special emphasis was fo-cused on the necessity and importance of incorporating solid transfer and reservoir deformation processes during multi-phase analyses.Finally,main bottlenecks and possible outbreak perspectives were discussed.The results might provide some significance for engineering-geological-environmental integrated field operations for sustainable marine NGH development.
关键词
天然气水合物/多场耦合/传热传质/泥砂输运/多相渗流
Key words
Natural gas hydrate/Multi-field coupling/Mass and heat transfer/Solid transportation/Multi-phase flow
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