Table 3
Geological formation properties, initial reservoir conditions, and the injection, production and reinjection parameters used in the simulation studies of the base case.
| Parameters | Aquifer | Aquitard |
|---|---|---|
| Geological formation | ||
| Porosity (–) | 0.3 | 0.1 |
| Permeability (mD) | 50 | 0.001 |
| Pore compressibility (Pa−1) | 4.5 × 10−10 | 4.5 × 10−10 |
| Thickness (m) | 540 | 160 |
| Rock grain density (kg/m3) | 2450 | 2000 |
| Rock grain specific heat (J/kg °C) | 1000 | 1000 |
| Thermal conductivity of the rock formation (W/m °C) | 2.1 | 2.1 |
| Initial reservoir conditions | ||
| Pressure | Hydrostatic pressure gradient | |
| Temperature gradient (°C/100 m) | 2.5 | |
| Salinity (g/L) | 1.8 | |
| Boundary conditions | ||
| Top boundary | Average annual surface temperature 12 °C, no mass flow | |
| Bottom boundary | No mass and heat flow (BB1) | |
| Lateral boundary | Open with heat and mass flow | |
| Injection, production and reinjection strategy | ||
| Well configuration | Two production and two water reinjection wells with another CO2 injection well (Type I) | |
| CO2 injection pressure at the bottom hole (MPa) | 30 | |
| CO2 injection temperature at the bottom hole (°C) | 10 | |
| Hot water production rate (kg/s) | 2 | |
| Cooled geothermal water reinjection enthalpy (kJ/kg) | 42 | |
| Cooled geothermal water reinjection rate (kg/s) | 2 | |