Experimental Study on Optimization of Polymer Preslug Viscosity of ASP Flooding in Interlayer Heterogeneous Well Group Artificial Sandstone Core

Table 1

Comparison of prototype and model parameters.

Similarity criteria	Attribute similarity	Purpose	Physical model values	Field values
	Ratio of gravity to driving force	Determine the amount of model injection	0.3 mL/min	30 m^3/d
	Geometric similarity	Determine the model size	70.7 cm	50 m
	Geometric similarity	Determine the model thickness	42 cm	30 m
	Dynamic similarity	Determine the injection-production pressure difference of the model	0.2 MPa	15 MPa
	Consistent porosity	Determine the model porosity	22%	22%
	Consistent crude oil viscosity	Determine the crude oil viscosity	10 mPa·s	10 mPa·s
	Consistent gas log permeability	Determine the model average permeability	500 mD	500 mD

Subscript : model; subscript : oilfield prototype; : reservoir thickness, m; : reservoir depth, m; : oil-phase density, kg/m³; : gas permeability, mD; : water-phase viscosity, mPa·s; : the volume of water injected into the reservoir by the injection well per unit time, m³/s; : the similarity ratio of characteristic length; : the model length, m; : the field prototype length, m; : porosity, %; : pressure difference between production and injection, MPa; %; : oil-phase viscosity, mD; : acceleration of gravity, m/s².