Experimental Study on the Properties and Displacement Effects of Polymer Surfactant Solution

Table 2

Interfacial tensions (mN/m) of Type I and Type III polymer surfactant prepared with fresh and produced water, respectively.

Polymer concentration (mg·L^−1)	Type I prepared by fresh water	Type I prepared by produced water	Type III prepared by fresh water	Type III prepared by produced water
200	30.82	29.12	22.15	20.26
400	31.21	28.69	23.14	22.32
600	29.23	28.63	21.85	20.36
800	29.01	28.12	22.18	21.26
1000	29.51	27.65	22.75	19.85