Research Article
Numerical Simulation Study of Fines Migration Impacts on an Early Water Drainage Period in Undersaturated Coal Seam Gas Reservoirs
Table 1
Basic parameters of the model.
| | Parameter | Value |
| | Initial concentration of static fines (%) | 5 | | Initial concentration of flowing fines (%) | 0 | | Initial water saturation (%) | 100 | | Fracture height (m) | 5 | | Porosity of cleat (dimensionless) | 0.008 | | Permeability of cleat (mD) | 1 | | Porosity of hydraulic fracture (dimensionless) | 0.05 | | Permeability of hydraulic fracture (mD) | 20 | | Grid size on the direction | 15 | | Grid size on the direction | 15, 7.5, 1.25 | | Grid size on the direction | 5 | | Initial pressure of coal (MPa) | 4 | | Compressibility of coal (10-4 MPa-1) | 2.354 | | Water density (g/cm3) | 1.08 | | Coal fines density (g/cm3) | 1.38 | | Water dynamic viscosity (mPa·s) | 1 |
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