Difference between cumulative water injection and cumulative water production:

$\begin{array}{l}\displaystyle {\rm WO} = \Omega_W^{\downarrow} \cdot Q_W^{\downarrow} - \Omega_W^{\uparrow} \cdot Q_W^{\uparrow}\end{array}$

where

$\begin{array}{l}Q_W^{\uparrow}\end{array}$	Cumulative water production	$\begin{array}{l}\Omega_W^{\uparrow}\end{array}$	Good water production share
$\begin{array}{l}Q_W^{\downarrow}\end{array}$	Cumulative water injection	$\begin{array}{l}\Omega_W^{\downarrow}\end{array}$	Good water injection share

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