Research Article
A Novel Dynamic Model for Predicting Pressure Wave Velocity in Four-Phase Fluid Flowing along the Drilling Annulus
Table 1
Parameters of the calculation well.
| | Type | Property | Value |
| | Mud | Density (kg/m3) | 1460 | | Viscosity (Pa⋅s) | |
| | Gas | Relative density | 0.65 | | Viscosity (Pa⋅s) | |
| | Oil | Density (kg/m3) | 800 | | Viscosity (Pa⋅s) | |
| | Water | Density (kg/m3) | 1000 | | Viscosity (Pa⋅s) | |
| | String | Elastic modulus of string (Pa) | | | Poisson ratio of string | 0.3 | | Roughness (m) | |
| | Surface condition | Surface temperature (K) | 298 | | Atmosphere pressure (MPa) | 0.101 |
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