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在自然界中，蕴藏着丰富的天然气水合物，水合物的结构有I、Ⅱ和H型。开发的方法有：热力分解法、减压法和注入化学剂等等。多孔介质中水合物的形成条件和管道、井筒中水合物的形成条件有较大的区别，在多孔介质中必须考虑毛细管力的作用，水合物的分解条件主要取决于多孔介质中岩石和流体的特性如润湿角和孔隙尺寸等。文章所推导出在多孔介质中考虑毛细管力的影响后，天然气水合物形成压力和温度与实验数据吻合较好，而没有考虑毛细管力的影响计算出的天然气水合物在给定温度下所得到的水合物的形成压力偏低。

Prediction of the Formation Conditions of Hydrate in Porous Media

??Natural world is rich in natural gas hydrates and their structures can be divide into Type-??,Type-?? and Type-H.Their exploiting methods include thermal decomposition,depressurization and chemical injection methods.The formation conditions of the hydrate in porous media are greatly different from those in pipeline or in well bore.In porous media,the capillary effects must be taken into account and the decomposed conditions of the hydrate are mainly dependent upon the properties of the rocks and fluids in porous media,such as wetting angle and pore radius,etc.On the basis of setting up a prediction model,was found that,forecasted by the model in consideration of the capillary effects,the pressure and temperature of forming gas hydrate in porous media are corresponding to the experimental data,but,forecasted by the model without considering the capillary effects,the pressure of forming gas hydrate in porous media at a given temperature is lower than the experimental one.