# Yield

## Brief

Yield is how much liquid hydrocarbons you get per volume of the gas produced.

Measured at the surface.

Calculated from the Flash.

## Math & Physics

$Yield = 10^6 \times \frac{x \times M_L \times \frac{1}{\rho_L} \times \frac{1}{5.615}}{y \times 379.5}\ \left [ \frac{bbl}{MMscf} \right ]$

## Nomenclature

$M_L$ = liquid molecular weight, lbm/lbmol
$\rho_L$ = liquid density, lbm/ft3
$x$ = molar fraction of the liquid phase, lbmol
$y$ = molar fraction of the vapor phase, lbmol
$Yield$ = yield, bbl/MMscf

### Conversions

379.5 scf/lbmol at Psc = 14.7 psia and Tsc = 60°F [1]