沉积物中天然气水合物的分解过程实际上是固态水合物在沉积物中吸收热量分解后发生相变的多相渗流、传热和传质过程.影响沉积物中水合物分解的因素众多,主要有沉积物类型、孔径分布、粒径大小、孔隙水组成、水合物饱和度、分布状况、初始生成压力和初始生成温度、胶结特性以及沉积层矿物成分等.本文通过实验模拟,研究得到人造岩芯中初始生成压力和温度、粒径、孔径等对水合物分解的影响规律.实验模拟结果认为沉积物中水合物分解规律和纯水体系完全不同,沉积物中水合物的分解速度随着初始生成压力的增加和初始温度的降低而加快,随着多孔介质粒径的减小和孔径的增大,水合物的分解速率降低. The decomposition process of natural gas hydrate in sediments is actually multi-phase seepage, heat transfer and mass transfer of phase transition after the absorbed heat in sediments decomposes, and there are many factors affecting the decomposition of hydrate in sediments, mainly There are sediment types, pore size distribution, particle size, pore water composition, hydrate saturation, distribution, initial formation pressure and initial formation temperature, cementation characteristics and sedimentary layer mineral composition, etc .. In this paper, through experimental simulation, artificial rock The influence of initial pressure and temperature, particle size and pore size on the decomposition of hydrate in the core was investigated.The experimental results show that the decomposition of hydrate in sediment is completely different from that of pure water system, and the decomposition rate of hydrate in sediment decreases with the initial As the pore size increases and pore size increases, the rate of hydrate decomposition decreases with the increase of formation pressure and initial temperature.