Reservoir parameters | Scope | Remarks |
Reservoir temperature/˚C | >60 - 80 | Bottom limit of low viscosity and low permeability reservoir can be 60˚C |
Crude oil viscosity/mPa・s in reservoir | <50 | Determination of foam system performance |
Oil specific gravity | 0.83 - 0.88 | Crude oil has good oxidation kinetic activity |
Reservoir permeability/10−3 μm2 | >5 | Air foam flooding permeability is not too low |
Reservoir pressure/MPa | 20 - 30 MPa | Considering air compressor injection capacity, reservoir depth 900 - 4000 m |
Reservoir thickness/m | 3 - 25 m | After flooding, it is better to have a large dip angle for gravity-stabilized flooding |
Applicable reservoir type | Low permeability light weight reservoir | Medium and high permeability heterogeneity is serious and high temperature and high salt reservoir and heavy oil reservoir |
Suitable reservoir rock type | Sandstone | Dolomite or limestone |
Other | Good reservoir performance | EOR is about 8 - 15 percent |