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Ratio of the variation of the field-average formation pressure in producers to the total field cumulative water injection
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| body | --uriencoded--Q_%7BWI%7D |
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for the same
time period
of time :
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{\rm RIR}(\delta t) = \frac{ \left<p_e(t+\delta t) \right>_{\rm PROD} - \left<p_e(t)\right>_{\rm PROD}}{Q^{Q\downarrow}_{WI}(t+\delta t) - QQ^{\downarrow}_{WI}(t) } |
It normally makes sense for the matured reservoirs with pressure depletion and indicates how efficiently waterflood supports the recovery of formation pressure in producers.
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