Single-phase gas flow (subsonic)

Input(s)

$P_{d}$: Downstream Pressure $(\mathrm{psi})$

$P_{u}$: Upstream Pressure at Choke $(\mathrm{psi})$ k: Specific Heat Ratio (dimensionless) A: Cross Sectional Area of Choke (in. ${ }^{2}$ )

$\gamma_{g}$ : Gas Specific Gravity related to Air (dimensionless)

$T_{u}$: Upstream Temperature (R)

$C_{d}$ : Choke Discharge Coefficient (dimensionless)

Output(s)

$q_{s c}$: Gas Flow Rate $(\mathrm{Mscf} / \mathrm{D})$

Formula(s)

Reference(s)

Boyun, G., William, C., & Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted Approach, Page: 5/61.