我们通过铸体薄片观察了双河油田核三段砂岩的次生孔隙体系特征,划分出四种孔隙度区域和9种孔隙网络类型,并给出了相应孔隙网络的压汞曲线和孔隙结构参数,在此基础上给出了每种孔隙网络的目估采收率范围,最后用加权平均法算出双河油田核三段原油采收率为40.5％。 We observed the secondary pore system characteristics of the core sandstone of the Third Member of the Shuanghe Oilfield through casting thin slices and classified four types of porosity regions and nine types of pore networks. The mercury injection curves and pore structure parameters of the corresponding pore networks Based on this, the range of the estimated recovery of each pore network is given. Finally, the weighted average method is used to calculate the oil recovery rate of 40.5% in the third member of the Shuanghe Oilfield.