In SI unit system:
t_D=\frac{\chi \cdot t}{r_e^2} |
where
| transition time | |
| pressure diffusivity | |
| characteristic radius of reservoir flow inflow or outflow area (usually a well radius or half-size of oil reservoir) |
t_D= 6.328 \cdot 10^{-3} \cdot \frac{\chi \cdot t}{r_e^2} |
where
| days | ft | (md·psi)/cp |
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing / Pressure Diffusion
[ Well & Reservoir Surveillance ] [ Pressure diffusion @model ]