A property characterising agility of the water under pressure gradient with account of reservoir permeability and dynamic fluid viscosity:

(1)	$\begin{array}{l}\displaystyle \left< \frac{k_w}{\mu_w} \right> = k_{air}\left< \frac{k_{rw}}{\mu_w} \right>\end{array}$

where

$\begin{array}{l}k_w\end{array}$	formation permeability to water
$\begin{array}{l}\mu_w\end{array}$	dynamic viscosity of water
$\begin{array}{l}k_{air}\end{array}$	absolute permeability to air
$\begin{array}{l}k_{rw}\end{array}$	relative formation permeability to water
$\begin{array}{l}\displaystyle \left< \frac{k_{rw}}{\mu_w} \right>\end{array}$	relative gas mobility

Page tree

See also