Research Article
Discrete Element Analysis for Hydraulic Fracture Propagations in Laminated Reservoirs with Complex Initial Joint Properties
Table 1
Microparameters of rock material used in the PFC2D model.
| | Microscopic input parameters | Symbol | Value |
| | Particle density (kg/m3) | | 2330.0 | | Young’s modulus of the particle (GPa) | | 32.0 | | Young’s modulus of the parallel bond (GPa) | | 32.0 | | Ratio of normal to shear stiffness of the particle | | 1.6 | | Ratio of normal to shear stiffness of the parallel bond | | 1.6 | | Particle friction coefficient | | 0.7 | | Parallel bond tensile strength (MPa) | | 24.0 | | Parallel bond shear strength (MPa) | | 30.0 | | Normal stiffness of smooth joint (GPa/m) | | 300.0 | | Shear stiffness of smooth joint (GPa/m) | | 300.0 | | Tensile strength of smooth joint (MPa) | | 6.0 | | Shear strength of smooth joint (MPa) | | 8.0 | | Frictional coefficient of bedding planes | | 0.7 | | Dilation angle (degree) | | 30.0 |
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