Water-Polymer Perturbation Characterization and Rules of Polymer Flooding in Offshore Heavy Oilfield

Table 1

Parameters in the model.

Parameters	Value	Parameters	Value
Initial reservoir pressure (MPa)	15	Formation porosity, fraction	0.30
Layer with high permeability (mD)	3000	Layer with low permeability (mD)	500
Formation thickness (m)	10	Maximum apparent adsorption (mg/g)	0.205
Formation temperature (°C)	65	Polymer concentration (mg/L)	1250
Oil viscosity (mPa·s)	17	Polymer viscosity (mPa·s)	13.8
Inaccessible pore volume (PV)	0.3	Residual resistance factor	3.0
Brine water viscosity (mPa·s)	1.0	Average production rate (m^3/d)	78
Water injection rate (m^3/d)	120	Polymer injection rate (m^3/d)	96