Wellhead pressure (multiphase flow across the choke)

Input(s)

C: Emprical Constant (dimensionless)

n: Emprical Constant (dimensionless)

$\mathrm{m}$ : Emprical Constant (dimensionless)

R: Producing Gas Liquid Ratio (SCF/BBL)

S: Choke Size $(1 / 64$ in.)

q: Gross Liquid Rate $(\mathrm{bbl} / \mathrm{d})$

Output(s)

$P_{w h}$: Upstream Wellhead Pressure $(\mathrm{psi})$

Formula(s)

$$ P_{w h}=C * R^{m} * \frac{q}{S^{n}} $$

Reference(s)

Boyun, G., William, C., \& Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted Approach, Page: 5/64.