Difference between revisions of "VRR"

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<div style='text-align: right;'>By {{REVISIONUSER}} on {{REVISIONTIMESTAMP}}</div>
  
 
==Brief==
 
==Brief==

Revision as of 05:27, 3 January 2023

By MishaT on 20230103052759

Brief

VRR stands for voidage replacement ratio. It is the ratio of injected fluid to produced fluid at the reservoir conditions.

VRR is calculated with the current rates and on the cumulative basis VRRcum.

Equation

 VRR = \frac{Injected\ reservoir\ volumes}{Produced\ reservoir\ volumes} = \frac{W_i B_{wi} + G_{gi} B_{ginj}}{N_p B_o + W_p B_{wp} + B_g(GOR-R_s)N_p}

where

 B_{g} = Gas formation volume factor, m3/m3
 B_{ginj} = Injected gas formation volume factor at reservoir pressure, m3/m3
 B_{wi} = Injected water formation volume factor, m3/m3
 B_{wp} = Produced water formation volume factor, m3/m3
 B_o = Oil formation volume factor, m3/m3
 GOR = Produced gas oil ratio, m3/m3
 G_{gi} = Injected gas volume, m3
 N_p = Oil produced, m3
 R_s = Solution gas oil ratio, m3/m3
 VRR = Voidage replacement ratio, fraction
 W_i = Water injected, m3
 W_p = Water produced, m3

See Also