Experimental simulation of gas hydrate decomposition in porous sediment

查看全文 作　　者：YU [1]XiChong;LI [2]Gang;LI [1]QingPing;LI [2]XiaoSen;ZHANG [2]Yu;PANG [1]WeiXin;BAI [1]YuHu

机构地区：[1]CNOOC Research Institute;[2]Guangzhou Institute of Energy Conversion

出　　处：《Science China Earth Sciences》索引2013年第56卷第4期,共6页

基　　金：supported by the National Basic Research Program of China (Grant No. 2009CB219507) 摘　　要：Gas hydrate decomposition in sediments involves complicated multiphase flow and heat and mass transfer processes because of heat absorption by solid hydrates. Factors affecting gas hydrate decomposition in sediments include sediment type, mineral composition, pore size distribution, particle size, pore water composition, hydrate saturation distribution, initial formation pressure and temperature and cement characteristics. In this paper, experimental simulations of gas hydrate decomposition are carried out on an artificial core to investigate the effects of initial pressure and temperature, particle size and pore size. The experiments show that the characteristics of gas hydrate decomposition in sediments differ completely from those in a pure water system. The decomposition rate of hydrate sediments increases with the initial pressure increasing and decreasing temperatures. Furthermore, the decomposition rate of hydrate sediments decreases with decreasing particle size and increasing pore size. 关键词：天然气水合物沉积物类型分解速率实验模拟多孔传热传质过程初始压力矿物组成

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Experimental simulation of gas hydrate decomposition in porous sediment

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