Analytical Model of Waterflood Sweep Efficiency in Vertical Heterogeneous Reservoirs under Constant Pressure

Table 1

The parameters of reservoir and fluid properties.

Variables	Value
Length of the model, (m)	200
Width of the model, (m)	100
Thickness of each layer, (m)	1
Pressure drop of the unit, (MPa)	10
Oil viscosity in the reservoir, (mPas)	5.6
Water viscosity in the reservoir, (mPas)	0.6
Average saturation before breakthrough, (f)	0.47
Saturation of front before breakthrough, (f)	0.33
before breakthrough, (f)	61.5
Residual oil saturation, (f)	0.30
Irreducible water saturation, (f)	0.32
before breakthrough, (f)	6.65
Porosity of the model, (f)	0.1
Permeability of layer 1, ( μm^2)	16.6
Permeability of layer 2, ( μm^2)	13
Permeability of layer 3, ( μm^2)	0.8
Permeability of layer 4, ( μm^2)	2.4
Permeability of layer 5, ( μm^2)	1.2