A property characterising agility of the gas under pressure gradient with account of reservoir permeability and dynamic fluid viscosity:
(1) | \left<\frac{k_g}{\mu_g} \right> = k_{air}\left<\frac{k_{rg}}{\mu_g} \right> |
where
k_g | |
---|---|
\mu_g | |
k_{air} | absolute permeability to air |
k_{rg} | relative formation permeability to gas |
\displaystyle \left<\frac{k_{rg}}{\mu_g} \right> | relative gas mobility |