Percentage of cumulative good water production to the historical records of the cumulative water injection :

\Omega_W^{\downarrow}  = \frac{Q_{W, \ \rm good}^{\downarrow}}{Q_W^{\downarrow}}

It shows the share of total injected water which entered the reservoir with hydrocarbons, this supporting its sweep.

It excludes a portion of water which was unwillingly injected into the water bearing formations.

See Also