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