中文摘要：

为了研究深层砂岩油藏注水开发过程中储层孔隙结构的变化规律，将取自东濮凹陷的深层砂岩储层样品进行了水驱前后的铸体图像和毛管压力曲线分析．研究表明，水驱后最大孔隙半径、最大喉道宽度（半径）增大，其增大幅度随渗透率增大而增大．水驱后，特低渗、低渗储层平均孔隙半径减小，中低渗储层平均孔隙半径增大，平均孔隙半径变化幅度小于最大孔隙半径变化幅度．特低渗储层水驱后岩石的孔隙均质性得到改善，而低渗、中低渗储层岩石孔隙的非均质程度增强．水驱后，低渗、中低渗储层岩石孔喉体积增大，特低渗储层岩石孔喉体积减小．水驱对岩石平均喉道宽度（半径）影响不大，水驱前后渗透率、渗流能力变化不大．水驱后平均喉道半径增大幅度低于最大喉道半径增大幅度，水驱对最大喉道半径的影响较平均喉道半径大．

英文摘要：

In order to analyze the law of pore structure variety in deep section sandstone reservoir during waterflooding development, the techniques of casting image, capillary pressure curves, and so on, were applied to study the pore structure before and after waterflooding in Dongpu sag. The research showed that the maximum pore radiu and the maximum throat radiu increased after waterflooding, and the increasing amplitude of the maximum pore radiu and the maximum throat radiu get higher with the increase of permeability. After waterflooding, the average pore radius decrease in Ultra-low permeability and low permeability reservoir, while it increase in Middle- low permeability reservoir, and the variation range of the average pore radiu is lower than that of the maximum pore radiu. After waterflooding, the pore homogeneity of Ultra-low permeability reservoir improve, and the pore heterogeneity of Low permeability and Middle-low permeability reservoir increase. After waterflooding, the pore throat volume of bw permeability and Middle-low permeability reservoir increase, and that of Ultra-low permeability reservoir decrease. There was nearly no effect on the average throat radius during waterflooding, and also there was nearly no charge in the permeability and percolation capacity. After waterflooding, the increasing amplitude of the average throat radiu is lower that of the maximum throat radiu, the effect of water flooding on the maximum throat radiu is higher than that of water flooding on the average throa radiu.