Difference between revisions of "VRR"

Latest revision as of 05:28, 3 January 2023

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

@@ Line 1: / Line 1: @@
 __TOC__
+<div style='text-align: right;'>By Mikhail Tuzovskiy on {{REVISIONTIMESTAMP}}</div>
 ==Brief==
@@ Line 5: / Line 6: @@
 [[VRR]] stands for voidage replacement ratio. It is the ratio of injected fluid to produced fluid at the reservoir conditions.
-===Equation===
+[[VRR]] is calculated with the current rates and on the cumulative basis '''VRRcum'''.
-:<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>
-where
+==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> A </math> = Area, m2
-:<math> h </math> = Net pay, oil saturated thickness, m
-:<math> HCPV </math> = Hydrocarbon pore volume, m3
-:<math> \phi </math> = Porosity, fraction
-:<math> S_o </math> = Oil saturation, fraction
-===Related definitions===
-Pore volume:
-:<math> PV = A * h * \phi</math>
-Movable pore volume:
-:<math> MOPV = A * h * \phi *(1-S_{wc}-S_{orw})</math>
 where
-:<math> S_{wc} </math> = Connate water saturation, fraction
+:<math> B_{g} </math> = Gas formation volume factor, m3/m3
-:<math> S_{orw} </math> = Residual oil saturation, fraction
+:<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_{wp} </math> = Produced water formation volume factor, m3/m3
+:<math> B_o </math> = Oil formation volume factor, m3/m3
+:<math> GOR </math> = Produced gas oil ratio, m3/m3
+:<math> G_{gi} </math> = Injected gas volume, m3
+:<math> N_p </math> = Oil produced, m3
+:<math> R_s </math> = Solution gas oil ratio, m3/m3
+:<math> VRR </math> = Voidage replacement ratio, fraction
+:<math> W_i </math> = Water injected, m3
+:<math> W_p </math> = Water produced, m3
 ==See Also==
+*[[HCPV]]
 *[[HCPVinj]]
 *[[STOIIP]]
@@ Line 34: / Line 33: @@
 *[[Block]]
 *[[Mature Water Flood Analysis]]
+*[[Oil Material Balance]]
 [[Category:E&P Portal]]
 [[Category:Mature Water Flood Analysis]]
 {{#seo:

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Difference between revisions of "VRR"

Latest revision as of 05:28, 3 January 2023

Contents

Brief

Equation

See Also