The effect of inorganic salt precipitation on oil recovery during CO2 flooding: A case study of Chang 8 block in Changqing oilfield, NW China

YUAN Zhou,LIAO Xinwei,ZHANG Kuaile,ZHAO Xiaoliang,CHEN Zhiming

Table 4 Model parameters

Parameters Value Parameters Value Oil viscosity 1.81 mPa·s Reservoir temperature 80 °C Permeability 0.2×10-3 μm2 Rock density 2500 kg/m3 Porosity 10% Solution gas-oil ratio 43 m3/m3 Initial water saturation 53% Initial oil saturation 60% Reactant CO2 coefficient 1 Reaction rate coefficient 5×10-6 Reactant H2O coefficient 1 280