Ratio of Water Replenishment ( WR ) to the remaining oil reserves ():

{\rm WOBR} = \frac{\rm WR}{OR} = \frac{ \Omega_W^{\downarrow} \cdot Q_W^{\downarrow} -  \Omega_W^{\uparrow} \cdot Q_W^{\uparrow} } { EUOR - Q_O^{\uparrow} }

where

	Estimated Ultimate Oil Recovery		Cumulative oil production
	Cumulative water production		Good water production share
	Cumulative water injection		Good water injection share

See Also