Difference between revisions of "VRR"

Revision as of 14:13, 23 March 2022

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.

VRR = \frac{Injected\ reservoir\ volumes}{Produced\ reservoir\ volumes} = \frac{W_i B_{wi} + I_g B_{gi}}{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_{gi}

= Injected gas formation volume factor, 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

I_g

= 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

Pore volume:

PV = A * h * \phi

Movable pore volume:

MOPV = A * h * \phi *(1-S_{wc}-S_{orw})

where

S_{wc}

= Connate water saturation, fraction

S_{orw}

= Residual oil saturation, fraction

Revision as of 14:13, 23 March 2022 (view source) MishaT (talk \| contribs) (→‎Brief) ← Older edit		Revision as of 14:13, 23 March 2022 (view source) MishaT (talk \| contribs) Newer edit →
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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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	[[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'''.