摘要
孔隙结构分布特征是影响固相颗粒在多孔介质中运移沉降规律的关键因素 .油藏砂岩孔隙大小分布在一定标度范围内具有统计自相似性 .采用地层砂岩压汞资料 ,通过对微分汞饱和度与孔隙半径进行对数回归来估计孔隙大小分布分维 ,并用三维多段组合式网络模型对注入颗粒在不同分维的多孔介质中运移沉降造成渗透率下降的规律进行了模拟研究 .探讨了颗粒运移沉降对地层伤害的程度和孔隙大小分布分维之间的关系 .
The pore size distribution of porous media is a main factor affecting the subsidence law of solid particles in the process of migration. There is a statistical selfsimilar character in the pore size distribution of reservoir sandstone in a certain range of scale. In this paper, the logarithms of differential mercury saturation and pore radius are regressed to estimate the fractal dimension value of pore size distribution according to the mercury data of sandstone, A 3D fivesection combinative pore network model is used to simulate the migration and subsidence trend of the solid particles in porous media with different fractal dimension. The relationship between the fractal dimension of the pore size distribution and the formation damage degree caused by solid particle transport and subsidence is discussed.
出处
《西安石油学院学报（自然科学版）》
2000年第2期14-17,共4页
Journal of Xi'an Petroleum Institute（Natural Science Edition)
基金
国家自然科学基金!资助 (课题编号 598740 2 0 )
关键词
固相颗粒
多孔介质
孔隙结构
地层损害
油气层
solid phase, grain, porous media, pore structure, network, formation damage
