Research Article
Apparent Permeability Model for Shale Gas Reservoirs Considering Multiple Transport Mechanisms
Table 2
Parameters for modeling results and discussion.
| | Parameter | Symbol | Unit | Value |
| | Formation temperature | | K | 368 | | Porosity | | Dimensionless | 0.05 | | Tortuosity | | Dimensionless | 3.5 | | Gas type | CH4 | — | — | | Gas molecule diameter | | m | 3.8 × 10−10 | | Gas molar mass | | kg/mol | 1.6 × 10−2 | | Universal gas constant | | J/(mol·K) | 8.3145 | | Boltzmann constant | KB | 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 | 5.82 | | Isosteric adsorption heat at the gas coverage of zero | | J/mol | 16,000 | | The ratio of the rate constant for blockage to the rate constant for forward migration | | Dimensionless | 0.5 | | Pore diameter | | nm | 2/4/10/20/50/100/200 |
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