关键词: 陆相, 砂岩, 正韵律油层, 聚合物, 驱油机理

Abstract: In order to improve the flooding effect in thick continental sandstone reservoirs with positive rhythmic sedimentation at the later high water cut stage,a pilot test of polymerflooding is made in the central area of Daqing Oilfield.In this paper,the purpose of the test,the petrophysical properties of the reservoir and the distribution of the remaining oil in-placeat the later high water cut stage are introduced,and the performance of the producers and theinjectors after polyrner flooding is emphatically described,so as to provide reference for further mechanism study and large-scale application of polymer flooding.

Key words: terrestrial fades, sandstone, positive rhythm reservoir, polymer, drive mechanism