Table 1.
Experimental data in physical simulation and numerical model.
| Parameter | Parameter value | Parameter | Parameter value |
|---|---|---|---|
| Permeability of matrix (10−3μm2) | 0.57 | Permeability of gravel (10−3 μm2) | 0.12 |
| Young’s modulus of matrix (GPa) | 36.7 | Young’s modulus of gravel (GPa) | 50.1 |
| Tensile strength of matrix (MPa) | 8.1 | Tensile strength of gravel (MPa) | 12.4 |
| Poisson’s ratio of matrix | 0.248 | Poisson’s ratio of gravel | 0.247 |
| Maximum horizontal stress (MPa) | 15 | Viscosity of fracturing fluid (mPa s) | 120 |
| Minimum horizontal stress (MPa) | 5 | Injection rate (mL min−1) | 20 |
| Gravel size of Speciment I (mm) | <20 | Gravel size of Speciment II (mm) | 40–100 |