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