Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs
Abstract
:1. Introduction
2. Gas Flow Regimes
2.1. Knudsen Number
2.2. Gas Flow Regimes
3. Gas Flow Mathematical Model
3.1. Darcy Flow
3.2. Slip Flow
3.3. Transition Flow
3.4. Molecular Free Flow
4. Mathematical Model with Multi-Flow Regimes
4.1. Gas Mathematical Model
4.2. Case Study
5. Sensitivity Analysis
5.1. Effect of Pressure on Flow Regimes
5.2. Effect of Temperature on Flow Regimes
5.3. Effect of Langmuir Pressure
5.4. Effect of Adsorption Thickness
5.5. Effect of Pressure
5.6. Effect of Temperature
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Gas Components | Mole Fraction (%) | Mole Mass (kg/kmol) | Collision Diameter (δ, ×10−9 m) |
---|---|---|---|
CH4 | 87.4 | 16 | 0.40 |
C2H6 | 0.12 | 30 | 0.52 |
CO2 | 12.48 | 44 | 0.45 |
Average | 19.50 | 0.41 |
Property | Value | Unit |
---|---|---|
Gas density (ρg) | 8.03 | kg/m3 |
Gas viscosity (μg) | 0.12 | ×10−4 Pa·s |
Average mean-free-path (λ) | 5.55 | nm |
Maximum adsorption thickness (d0) | 0.50 | nm |
Knudsen number (Kn) | 5.55 | 1 |
Temperature (T) | 300 | K |
Pressure (P) | 10 | MPa |
Pressure gradient ( P) | 5 | MPa |
Langmuir pressure (PL) | 10 | MPa |
Universal gas constant (R) | 8.31 | Pa·m3/(mol·K) |
Gas mole mass (M) | 19.50 | ×10−3 kg/kmol |
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Shen, W.; Li, X.; Xu, Y.; Sun, Y.; Huang, W. Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs. Energies 2017, 10, 751. https://doi.org/10.3390/en10060751
Shen W, Li X, Xu Y, Sun Y, Huang W. Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs. Energies. 2017; 10(6):751. https://doi.org/10.3390/en10060751
Chicago/Turabian StyleShen, Weijun, Xizhe Li, Yanmei Xu, Yuping Sun, and Weigang Huang. 2017. "Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs" Energies 10, no. 6: 751. https://doi.org/10.3390/en10060751