Main Controlling Factor of Polymer-Surfactant Flooding to Improve Recovery in Heterogeneous Reservoir

Table 3

The viscosity of the polymer solution under different conditions.

Polymer concentration mg/L	Injected water		Formation water
	Viscosity before shearing, mPa⋅s	Viscosity after shearing, mPa⋅s	Viscosity before shearing, mPa⋅s	Viscosity after shearing, mPa⋅s
1500	39.67	28.96	30.14	20.29
2000	51.64	37.26	42.31	28.86
2500	72.46	54.16	59.47	42.41