Expansion Velocity Model of Steam-Assisted Gravity Drainage considering Thermal Convection

Table 1

Model verification parameter table.

Item	Value	Item	Value
Porosity	0.3	Steam temperature	240°C
Permeability		Steam chamber angle	45°
Reservoir thickness	20 m	Chamber temperature	280°C
Caprock thickness	15 m	Reservoir temperature	30°C
Well spacing	100 m	Reservoir density	2500 kg·m^-3
Horizontal well length	350 m	Convective phase density	1500 kg·m^-3
Reservoir pressure	1.2 MPa	Moving speed of steam
Oil viscosity		Thermal diffusivity
Water specific heat capacity	4200 J/(kg·K)	Original oil saturation	0.85
Oil specific heat capacity	1800 J/(kg·K)	Connate-water saturation	0.15
Thermal conductivity	1.5 W/(m·°C)	Relative permeability of bound water oil phase	0.85
Injection pressure	1.80 MPa	Absolute reservoir permeability
Pressure–viscosity factor	2
Temperature–viscosity factor	3	Relative permeability of water phase under residual oil	0.03