关键词: 聚合物驱, 驱油效率, 提高采收率, 剩余油分布, 分子动力学

Abstract: Based on molecular dynamics principles,the molecular operation power in polymer flooding is contrasted with that of water flooding.It is concluded that visco-elastic character of polymer solution is the microscopic behavior of friction and striking forces between polymer molecules and oil molecules,and polymer flooding can enhance oil displacement efficiency.The data of sealing core drilling in B1-6-J27 Well for checking water flooding effectiveness and B1-6-J26 Well away 30 meters from B1-6-J27 Well for checking polymer flooding effectiveness in Duanxi of Bei-1 district in Daqing Oilfield are contrasted.The comparison of the density distribution curves of core residual oil saturation shows that the proportion of core reaching residual oil saturation increased evidently and proportion of core with high saturation for polymer flooding relative to water flooding was reduced distinctly.It is testified that polymer flooding can enlarge the swept volume and enhance oil-displacement efficiency in the similar conditions.

Key words: polymer flooding, oil-displacement efficiency, enhance oil recovery, residual oil distribution, molecular dynamics