Research Article
A Simplified Capillary Bundle Model for CO2-Alternating-Water Injection Using an Equivalent Resistance Method
Table 2
Parameters for CO2 water-alternating-gas model.
| | Parameters | Value | Parameters | Value |
| | Capillary radius (μm) | 5~15 | Capillary length (cm) | 30 | | Water/CO2 interfacial tension (mN/m) | 20 | Water/CO2 contact angle (degree) | 60 | | Crude oil viscosity (mPa·s) | 5 | CO2 viscosity (mPa·s) | 0.05 | | Water viscosity (mPa·s) | 2 | (cm) | 0.001 | | (cm/(Pa∙s)) | 0.001 | CO2 injection time (s) | 5 | | (cm2/s) | | Time interval (s) | 0.1 | | Injection time (s) | 5 | Pore throat ratio | 3 | | Pressure difference at both ends of the capillary bundle (MPa) | 1 | Distance between throat and inlet end (cm) | 2~3 | | Throat length (cm) | 1 | Number of capillaries | 11 |
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