Research Article
CO2 Permeability Analysis of Caprock Containing a Single Fracture Subject to Coupled Thermal-Hydromechanical Effects
Table 2
Parameters used in 2D THM coupled model.
| | Parameter | Value | Note |
| | Density, kg/m3 | 2500 | Rock matrix | | Young’s modulus, GPa | 100 | | Poisson’s ratio | 0.3 | | Heat conductivity, W/(m × K) | 2.57 | | Specific heat capacity, J/(m × K) | 710 | | Thermal expansion, 1/K | 6.0 × 10−7 |
| | Initial normal stiffness of fracture closure, GPa/m | 60 | Fracture | | Normal stiffness of fracture opening, GPa/m | 100 | | Initial aperture, m | | | Residual aperture, m | 1 × 10−6 | | Maximum aperture, m | 0.002 | | Fluid pressure at the lower side, MPa | | | Fluid pressure at the upper side, MPa | |
| | Density, kg/m3 | Figure 6(a) | Supercritical CO2 | | Dynamic viscosity, Pa⋅s | Figure 6(b) | | Compression coefficient, 1/Pa | Calculated with Figure 6(a) | | Thermal expansion, 1/K | Calculated with Figure 6(b) |
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