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 4 Experimental results of resistance coefficient of surface-active polymer solution.

No.	Gas permeability of cores/10^-3μm²	Concentration of surface-active polymer/(mg·L^-1)	Resistance coefficient
No.	Gas permeability of cores/10^-3μm²	Concentration of surface-active polymer/(mg·L^-1)	Measurement value	Average value
1	100	750	168	119.3
2	200		120
3	500		70
4	100	1000	268	227.7
5	200		245
6	500		170
7	100	1250	415	303.7
8	200		279
9	500		217
10	100	1500	1181	917.7
11	200		898
12	500		675
13	100	2000	1899	1250
14	200		1113
15	500		738