Synonym: Pressure diffusivity = Hydraulic diffusivity
Ability of reservoir to translate fluid pressure throughout the pore volume:
\chi = \bigg<\frac{k}{\mu} \bigg> \ \frac{1}{c_t \, \phi} = \frac{M}{\beta} |
where
| multiphase fluid mobility | |
| total compressibility | |
| effective porosity | |
| storativity |
In case of single-phase reservoir flow:
\chi = \frac{k}{\mu \cdot c_t \cdot \phi} |
where
| formation permeability | |
| dynamic fluid viscosity |
Typical values for 1 md aquifer is (or
or
) and grows proportionally to permeability and declines proportionally to viscosity.
Physics / Fluid Dynamics / Percolation
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Reservoir Flow Simulation
[ Field Study & Modelling ] [ Complex reservoir properties ] [ Basic diffusion model parameters ]