Experimental simulation of gas hydrate decomposition in porous sediment
Experimental simulation of gas hydrate decomposition in porous sediment作者机构：CNOOC Research Institute Guangzhou Institute of Energy Conversion
出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)
年 卷 期：2013年第56卷第4期
页 面：588-593页
核心收录：
学科分类：08[工学] 0708[理学-地球物理学] 0824[工学-船舶与海洋工程] 0704[理学-天文学]
基 金：supported by the National Basic Research Program of China (Grant No. 2009CB219507)
主 题：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
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.
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