Research Article
Research and Application of Coal Seam Permeability Improvement Technology by Sectional Directional Hydraulic Fracturing
Table 1
Related parameters of staged hydraulic fracturing model.
| | Object | Parameter | Numerical value |
| | Reservoir | Elastic modulus/GPa | 3.5 | | Poisson’s ratio | 0.2 | | Permeability | 1 × 10−7 | | Porosity ratio | 0.2 | | Crustal stress (, , )/MPa | 5, 9, 10 |
| | Interlayer | Elastic modulus/GPa | 20 GPa | | Poisson’s ratio | 0.25 | | Permeability | 1 × 10−9 | | Porosity ratio | 0.2 | | Crustal stress (, , )/MPa | 5, 10, 10 |
| | Fluid properties | Fluid leak off/(m/s) | 1 × 10−4 | | Fracturing fluid viscosity/(Pa/s) | 1 × 10−3 | | Fracturing fluid density/(kg/m3) | 9800 | | Input pickup rate/(m3/s) | 1 × 10−4 |
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