砂岩孔隙结构分形模型及随机网络仿真

建立了砂岩多孔介质孔隙空间分布的分形模型，用改变粗视化程度方法导出了孔隙半径和喉道半径分布的分形模型及相应的概率模型，提出了用实际压汞实验验证上述模型及由压汞数据确定岩心孔喉大小分布分形维数的方法。所构造的网络仿真模型可以体现孔隙空间分布、孔隙大小分布以及配位数的不确定性，实现了将宏观参数（孔隙度，网络面积）与网络微观特征（孔隙结构）相结合。应用本模型可进行多孔介质的水动力学研究及油层物理研究。

FRACTAL MODEL FOR STRUCTUKE OF POROUS MEDIA AND STOCHASTIC NETWORK SIMULATION

A fractal model of spatial pore distri bution in permeable sand stone isconstructed.The fractal model of pore and channel size distri bution is obtained by changingcoarse view standard,The stochastic model is constructed.Thefractal model can be verti fiedby the experitnents of capillary pressure measurement.On the other hand,the fractaldimension of pore size distribution can bc determined by the experimental data. Theconstructed network model can simulate the uncertainties of spatial pore distri bution,pore siZedistribution and coordination number,and can also simulate dead-end pores,The combinati onof macroscopic parameters(porosity and scale of area simulated)to microscopi c characteristicsof this network is achieved.This network model can be used for studying mechanics of flowin porous media and physics of reservoir.