Usually produced from subsurface gas phase and oil phase.

It usually requires additional processing before taking commercial form of the Natural Gas.

For MBO fluid @model the gas surface flowrate $\begin{array}{l}q_G\end{array}$ is related to gas sandface flowrate $\begin{array}{l}q_g\end{array}$ and oil sandface flowrate $\begin{array}{l}q_o\end{array}$ as (see derivation):

(1)	$\begin{array}{l}\displaystyle q_G = \frac{q_g}{B_g} + R_s \, \frac{q_o}{B_o}\end{array}$

where

$\begin{array}{l}B_o, B_g\end{array}$	oil formation volume factor between separator and sandface pressure/temperature conditions
$\begin{array}{l}R_s\end{array}$	Solution GOR at sandface pressure/temperature conditions

The gas surface flowrate $\begin{array}{l}q_G\end{array}$ relates to Surface Liquid production rate $\begin{array}{l}q_L\end{array}$ as:

(2)	$\begin{array}{l}\displaystyle q_G = Y_G \cdot (1-Y_w) \, q_L\end{array}$

The gas surface flowrate $\begin{array}{l}q_G\end{array}$ relates to Total sandface flowrate $\begin{array}{l}q_t\end{array}$ as:

(3)	$\begin{array}{l}\displaystyle q_G = \frac{ Y_G \cdot (1-Y_W)}{B_w Y_W + \left[ (B_o - R_s B_g) + (B_g - R_v B_o) \, Y_G \right] \cdot (1-Y_W)} \cdot q_t\end{array}$

It simplifies for the Black Oil model ( $\begin{array}{l}R_v = 0\end{array}$ ) to:

(4)	$\begin{array}{l}\displaystyle q_G =\frac{q_g}{B_g} +\frac{R_s \, q_o}{B_o} = Y_G \cdot (1-Y_w) \, q_L = \frac{ Y_G \cdot (1-Y_W)}{B_w Y_W + \left[ (B_o - R_s B_g) + B_g \, Y_G \right] \cdot (1-Y_W)} \cdot q_t\end{array}$

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