【摘要】 分析了沉积层中天然气水合物形成的原因。在公认的水合物形成地质模型基础上,借助分形几何理论,对分形维数df进行了修正。描述了天然气水合物在分形介质中的扩散特性及生成动力学特性,对水合物的形成速率方程进行了数值求解,研究了分形维数df及扩散半径r的改变对水合物形成速率的影响,将所得结果与实验室数据进行了比较。通过对水合物在天然多孔介质中的生成过程的模拟,为实现对我国南海地区天然气水合物矿藏的预测与分析做了理论探索。更多还原

【Abstract】 The formation mechanism of Natural Gas Hydrate in sediments was analyzed firstly, and then based on accepted geological model, the theory of fractal geometry was used to modify fractal dimension d_f. The characteristics of mass transfer and formation kinetics of natural gas hydrate in fractal medium were described, and the formation rate equation was solved by numerical calculation. The influence of fractal dimension and diffusion radius to natural gas hydrate formation rate was investigated in this paper, and the results were compared with the experimental data. The work of simulating natural gas hydrate formation process in natural porous medium will be a novel theoretical exploration to predict and explore gas hydrate resources in South Sea of China and it will be a new way to investigate the formation mechanic of natural gas hydrate in sediment.更多还原