Table 1
Basic parameters for water hammer simulation.
| Relevant parameters | Value | Relevant parameters | Value |
|---|---|---|---|
| Liquid phase elastic modulus (Pa) | 5 × 109 | Gas elastic modulus (Pa) | 2 × 105 |
| Drill pipe elastic modulus (Pa) | 2.06 × 1011 | Casing elastic modulus (Pa) | 2.06 × 1011 |
| Formation density (kg/m3) | 2600 | External diameter of drill pipe (mm) | 127 |
| Formation permeability (mD) | 20 | Internal diameter of drill pipe (mm) | 108 |
| Formation supply radius (m) | 150 | Reservoir effective thickness (m) | 3 |
| Relative density of natural gas | 0.65 | Gas viscosity (mPa s) | 0.027 |
| Surface temperature (°C) | 20 | Geothermal gradient (°C/m) | 0.023 |