Difference between revisions of "VRR"

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<div style='text-align: right;'>By Mikhail Tuzovskiy on {{REVISIONTIMESTAMP}}</div>
  
 
==Brief==
 
==Brief==
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[[VRR]] stands for voidage replacement ratio. It is the ratio of injected fluid to produced fluid at the reservoir conditions.
 
[[VRR]] stands for voidage replacement ratio. It is the ratio of injected fluid to produced fluid at the reservoir conditions.
  
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===Equation===
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[[VRR]] is calculated with the current rates and on the cumulative basis '''VRRcum'''.
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:<math> VRR = \frac{Injected\ reservoir\ volumes}{Produced reservoir volumes} = \frac{W_i B_{wi} + W_g B_{gi}}{N_p B_o + W_p B_{wp} + B_g(GOR-R_s)N_p}</math>
 
  
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where
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==Equation==
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:<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>
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:<math> A </math> = Area, m2
 
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:<math> h </math> = Net pay, oil saturated thickness, m
 
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:<math> HCPV </math> = Hydrocarbon pore volume, m3
 
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:<math> \phi </math> = Porosity, fraction
 
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:<math> S_o </math> = Oil saturation, fraction
 
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===Related definitions===
 
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Pore volume:
 
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:<math> PV = A * h * \phi</math>
 
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Movable pore volume:
 
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:<math> MOPV = A * h * \phi *(1-S_{wc}-S_{orw})</math>
 
  
 
where
 
where
  
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:<math> S_{wc} </math> = Connate water saturation, fraction
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:<math> B_{g} </math> = Gas formation volume factor, m3/m3
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:<math> S_{orw} </math> = Residual oil saturation, fraction
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:<math> B_{ginj} </math> = Injected gas formation volume factor at reservoir pressure, m3/m3
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:<math> B_{wi} </math> = Injected water formation volume factor, m3/m3
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:<math> B_{wp} </math> = Produced water formation volume factor, m3/m3
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:<math> B_o </math> = Oil formation volume factor, m3/m3
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:<math> GOR </math> = Produced gas oil ratio, m3/m3
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:<math> G_{gi} </math> = Injected gas volume, m3
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:<math> N_p </math> = Oil produced, m3
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:<math> R_s </math> = Solution gas oil ratio, m3/m3
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:<math> VRR </math> = Voidage replacement ratio, fraction
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:<math> W_i </math> = Water injected, m3
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:<math> W_p </math> = Water produced, m3
  
 
==See Also==
 
==See Also==
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*[[HCPV]]
 
*[[HCPVinj]]
 
*[[HCPVinj]]
 
*[[STOIIP]]
 
*[[STOIIP]]
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*[[Block]]
 
*[[Block]]
 
*[[Mature Water Flood Analysis]]
 
*[[Mature Water Flood Analysis]]
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*[[Oil Material Balance]]
  
 
[[Category:E&P Portal]]
 
[[Category:E&P Portal]]
 
[[Category:Mature Water Flood Analysis]]
 
[[Category:Mature Water Flood Analysis]]
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{{#seo:

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

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