Difference between revisions of "Beggs and Robinson Oil Viscosity correlation"
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| − | Dead oil viscosity: | + | '''Dead oil viscosity''': |
:<math>\mu_{od} = 10^x-1</math> | :<math>\mu_{od} = 10^x-1</math> | ||
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:<math>x = T^{-1.163} \times e^{(13.108-6.591/SG_{o})}</math> | :<math>x = T^{-1.163} \times e^{(13.108-6.591/SG_{o})}</math> | ||
| − | Saturated oil viscosity: | + | '''Saturated oil viscosity''' (P < P<sub>b</sub>): |
:<math>\mu_{os} = A \mu_{od}^B</math> | :<math>\mu_{os} = A \mu_{od}^B</math> | ||
| Line 25: | Line 25: | ||
:<math> B = 5.44\ (R_s + 150)^{-0.338} </math> | :<math> B = 5.44\ (R_s + 150)^{-0.338} </math> | ||
| − | Undersaturated oil viscosity: | + | '''Undersaturated oil viscosity''' (P > P<sub>b</sub>): |
:<math>\mu_{o} = \mu_{os} (P/P_b)^m </math><ref name=VB1980/> | :<math>\mu_{o} = \mu_{os} (P/P_b)^m </math><ref name=VB1980/> | ||
Revision as of 10:13, 25 July 2017
Contents
Brief
Beggs - Robinson is an empirical correlation for the oil viscosity published in 1975 [1].
Math & Physics
Dead oil viscosity:
where:
Saturated oil viscosity (P < Pb):
where:
Undersaturated oil viscosity (P > Pb):
where:
Discussion
Application range
Nomenclature
= coefficient
= coefficient
= coefficient
= pressure, psia
= solution gas-oil ratio, scf/stb
= oil specific gravity, dimensionless
= temperature, °F
= coefficient
= viscosity, cP
Subscripts
b - bubble point
od - dead oil
os - saturated oil
o - undersaturated oil
References
- ↑ Beggs, H. D.; Robinson, J. R. (September 1975). "Estimating the Viscosity of Crude Oil Systems"
. Journal of Petroleum Technology. 27(09) (SPE-5434-PA).
- ↑
Vazquez, M.; Beggs, H.D. (1980). "Correlations for Fluid Physical Property Prediction.". Society of Petroleum Engineers (SPE-6719-PA).
