Experimental study on surface-active polymer flooding for enhanced oil recovery: A case study of Daqing placanticline oilfield, NE China
YU Qiannan,LIU Yikun,LIANG Shuang,TAN Shuai,SUN Zhi,YU Yang
Table 6 The proportions of swept area after floodings by different displacement agents.
Displacement mode Proportion of
swept area		 Difference of the swept
area proportion/%
Water flooding
Surface-active polymer flooding
Second time water flooding		 22.3
69.8
72.3
47.5
2.5