Alkali/Surfactant/Polymer Flooding in the Daqing Oilfield Class II Reservoirs Using Associating Polymer

Table 1

Composition of the simulated injection water.

Ion style	Ion concentration (mg L^−1)
K^+ and Na^+	1044.87
Ca^2+	56.51
Mg^2+	24.90
HCO3^−	2351.91
SO4^2−	148.12
Cl^−	256.46
Total dissolved substance (TDS)	3882.77