Dimensionless drawdown correlating parameter by Carter

Input(s)

$\mu_{g i}$: Initial Gas Viscosity $(\mathrm{cP})$

$\mu_{\text {gavg }}$: Average Gas of Viscosity $(\mathrm{cP})$

$c_{g i}$: Initial Gas Compressibility $(1 / \mathrm{psi})$

$c_{\text {gavg }}$: Average Gas Compressibility $(1 / \mathrm{psi})$

Output(s)

$\lambda$: Dimensionless Drawdown Correlating Parameter (dimensionless).

Formula(s)

$$ \lambda=\frac{\mu_{g i} * c_{g i}}{\mu_{\text {gavg }} * c_{\text {gavg }}} $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 256.