中文摘要：

分别利用两种热力学方法（基于逸度相等的方法与基于活度相等的方法）预测了不同多孔介质中气体水合物的平衡分解条件，对于非水合物相，逸度方法采用Trebble—Bishnoi（TB）方程，而活度方法则使用Soave—Redlich—Kwong（SRK）方程，对于水合物相，两种方法都利用了van der Waals—Platteeuw模型结合Llamedo等关于毛细管力作用模型来模拟．两种方法的预测结果与实验结果吻合，逸度方法的预测效果要好于活度方法．

英文摘要：

Gas hydrate equilibrium dissociation conditions in the porous media were predicted using two thermodynamic approaches, based on equal fugacities and equal activities, respectively. For non-hydrate phase, the Trebble-Bishnoi （TB） equation was employed in the fugacity approach, while the Soave-Redlich- Kwong （SRK） equation was applied in the activity approach. For the hydrate phase, the van der Waals- Platteeuw model in conjunction with the capillary model of Llamedo et al. was used in both the two approaches. The predictions by the two approaches were all in good agreement with the experimental data. The prediction accuracy of the fugacity approach is better than that of the activity approach.