Research Article
Apparent Permeability Model for Shale Gas Reservoirs Considering Multiple Transport Mechanisms
Table 1
Parameters for the validation case.
| Parameter | Symbol | Unit | Value |
| Formation temperature | | K | 300 | Porosity | | Dimensionless | 0.048 | Tortuosity | | Dimensionless | 1.35 | Gas type | CO2 | — | — | Gas molecule diameter | | m | 4.64 × 10−10 | Gas molar mass | M | kg/mol | 4.4 × 10−2 | Universal gas constant | | J/(mol·K) | 8.3145 | Boltzmann constant | | J/K | 1.3805 × 10−23 | Molar volume of gas under standard condition | | m3/mol | 0.0224 | Avogadro’s constant | | 1/mol | 6.02 × 1023 | Langmuir pressure | | MPa | 1.8 | Isosteric adsorption heat at the gas coverage of zero | | J/mol | 203,000 | The ratio of the rate constant for blockage to the rate constant for forward migration | | Dimensionless | 0.21 | Pore diameter | | nm | 2.8 |
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The parameters highlighted with asterisk ( ) are matched with the experimental data. |