Abstract: The geological conditions of methane hydrate reservoir are very complex, and it is difficult to carry out boring sample. The experimental system of methane hydrate formation and dissociation was designed and constructed, and the formation and dissociation characteristics of methane hydrate within porous media were studied by experiments. The phase equilibrium curve was measured. The methane hydrate dissociation experiments by depressurization were performed. The results show that heat transfer is main controlling factors which affect methane hydrate dissociation bearing porous media with high permeability.

Key words: Methane hydrate,    , Phase equilibrium,    , Dissociation by depressurization,    , Controlling mechanism

摘要： 自然界中甲烷水合物储存条件复杂,直接岩芯取样进行研究存在困难。通过搭建水合物合成与分解实验系统,对多孔介质中甲烷水合物的合成与分解特性进行了实验研究,测定了甲烷水合物的相平衡曲线,通过对甲烷水合物进行降压分解实验研究,结果表明在渗透率较大的多孔介质中,热量传递是影响水合物分解的主要控制因素。

关键词: 甲烷水合物 , 相平衡 , 降压分解 , 控制机理