Ability of reservoir fluid to translate fluid volumes throughout the pore volume:
| (1) | \sigma = \bigg< \frac{k}{\mu} \bigg> \ h |
where
\bigg<\frac{k}{\mu} \bigg> | multiphase fluid mobility |
|---|---|
h | effective formation thickness |
For a single-phase fluid it simplifies to:
| (2) | \sigma = \frac{kh}{\mu} |
where
k | formaiton permeability to a single-phase fluid |
|---|---|
\mu | fluid viscosity |
h | effective formation thickness |