Ratio of the variation of the field-average formation pressure in producers to the total field cumulative water injection for the same time period :
{\rm RIR}(\delta t) = \frac{ \left<p_e(t+\delta t) \right>-\left<p_e(t)\right>}{Q_{WI}(t+\delta t) - Q_{WI}(t) } |
It measures how efficiently waterflood supports the formation pressure in producers and represents one of the key Waterflood Diagnostics.
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis / Waterflood Diagnostics