Usually produced from water phase only.

For MBO fluid @model the water surface flowrate $\begin{array}{l}q_W\end{array}$ is related to water sandface flowrate $\begin{array}{l}q_w\end{array}$ as (see derivation):

(1)	$\begin{array}{l}\displaystyle q_W^{\uparrow} = \frac{q_w}{B_w}\end{array}$

where

$\begin{array}{l}B_w\end{array}$

formation volume factors between separator and sandface pressure/temperature conditions

It relates to Liquid production rate at surface as:

(2)	$\begin{array}{l}\displaystyle q_W^{\uparrow} = Y_W \, q_L^{\uparrow}\end{array}$

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