Difference between cumulative water injection
Q_w^{\downarrow} and cumulative water production
Q_w^{\uparrow} normalized on to the pore volume
V_{\rm phi}:
{\rm NWR} = B_w \cdot \frac {Q_W^{\downarrow} - Q_W^{\uparrow} }{ V_{\rm phi} } |
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis / Waterflood Diagnostics / Water Replenishment (WR)