MULTI-FIELD COUPLING MODES DURING MARINE NATURAL GAS HY-DRATE EXPLOITATION AND ITS ADVANCEMENTS
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.
Natural gas hydrateMulti-field couplingMass and heat transferSolid transportationMulti-phase flow
万方数据
维普
