Abstract: To reveal oil displacement process in glutenite reservoir by polymer flooding process, this paper chooses the representative core samples and presents the oil and water producing characteristics during the process of water/polymer flooding and the remaining oil distribution after water/polymer flooding of the samples with different modal pore structures in the Lower Karamay glutenite reservoir of East District?7(1) in Karmay oilfield by means of online CT scanning monitoring and NMR approach. The study shows that such core samples are of significant differences in flooding efficiency, of which duel modal sample is the highest by polymer flooding process; however, they have the same displacement patterns: the water flooding tends to sweep/produce the zones with high oil saturation, while polymer flooding can enlarge the areas swept by previous water flooding process, but the crude oil in low?oil?saturation zones and isolated pores may not be produced on the whole