Difference between revisions of "VRR"

From wiki.pengtools.com
Jump to: navigation, search
(Equation)
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
__TOC__
 
__TOC__
 +
<div style='text-align: right;'>By Mikhail Tuzovskiy on {{REVISIONTIMESTAMP}}</div>
  
 
==Brief==
 
==Brief==
Line 7: Line 8:
 
[[VRR]] is calculated with the current rates and on the cumulative basis '''VRRcum'''.
 
[[VRR]] is calculated with the current rates and on the cumulative basis '''VRRcum'''.
  
===Equation===
+
==Equation==
 
:<math> 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}</math>
 
:<math> 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}</math>
  
Line 13: Line 14:
  
 
:<math> B_{g} </math> = Gas formation volume factor, m3/m3
 
:<math> B_{g} </math> = Gas formation volume factor, m3/m3
:<math> B_{ginj} </math> = Injected gas formation volume factor, m3/m3
+
:<math> B_{ginj} </math> = Injected gas formation volume factor at reservoir pressure, m3/m3
 
:<math> B_{wi} </math> = Injected water formation volume factor, m3/m3
 
:<math> B_{wi} </math> = Injected water formation volume factor, m3/m3
 
:<math> B_{wp} </math> = Produced water formation volume factor, m3/m3
 
:<math> B_{wp} </math> = Produced water formation volume factor, m3/m3

Latest revision as of 05:28, 3 January 2023

By Mikhail Tuzovskiy on 20230103052823

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