Difference between revisions of "Vasquez and Beggs Oil Compressibility correlation"

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== Math & Physics ==
 
== Math & Physics ==
  
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:<math>B_o = \frac{\rho_{STO}+1.22117\ R_s\ SG_g}{\rho_{oR}}</math><ref name=PracticalPVT/>
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:<math>c_o = \frac{28.1R_s+30.6T-1180SG_g+\frac{1784}{SG_o}-10910}{10^5P}</math><ref name=PracticalPVT/>
  
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== Example. Calculation of the oil formation volume factor ==
+
== Example. Calculation of the oil compressibility ==
 
Example source <ref name=DW/>
 
Example source <ref name=DW/>
 
===Input data===
 
===Input data===
 
:<math>R_s</math> = 53.24 sm<sup>3</sup>/sm<sup>3</sup> at P = 10 MPa
 
:<math>R_s</math> = 53.24 sm<sup>3</sup>/sm<sup>3</sup> at P = 10 MPa
 +
:<math>T</math> = 90C or 363K
 
:<math>SG_o</math> = 0.85 or 35 API
 
:<math>SG_o</math> = 0.85 or 35 API
 
:<math>SG_g</math> = 0.75
 
:<math>SG_g</math> = 0.75
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:<math>\rho_{oR}</math> = 749 kg/m<sup>3</sup> at P = 10 MPa
 
  
−
Calculate oil formation oil factor at p = 10 MPa?
+
Calculate oil compressibility at p = 10 MPa?
  
 
===Solution===
 
===Solution===
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:<math>B_o</math> = 1.199 rm<sup>3</sup>/sm<sup>3</sup>
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:<math>c_o</math> = 0.002907 MPa<sup>-1</sup> or 2.95E-4 atm
  
 
The solution is available in the online PVT calculator software model at [https://www.pengtools.com/pvtCalculator?paramsToken=de71e4cc29541ab2117e07408864410c www.pengtools.com]
 
The solution is available in the online PVT calculator software model at [https://www.pengtools.com/pvtCalculator?paramsToken=de71e4cc29541ab2117e07408864410c www.pengtools.com]
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−
== Application range ==
 
−
 
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:<math>  2.35 \le R_s \le 322 </math>
 
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:<math>  0.754 \le SG_o \le 0.989 </math>
 
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:<math>  0.555 \le SG_g \le 1.245 </math>
 
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:<math>  21.1 \le T, C \le 160 </math>
 
  
 
== Nomenclature ==
 
== Nomenclature ==
−
:<math> B_o </math> =  oil formation volume factor, rm<sup>3</sup>/sm<sup>3</sup>
+
:<math> c_o </math> =  oil compressibility, MPa<sup>-1</sup>
 +
:<math> P </math> =  pressure, MPa
 
:<math> R_s </math> =  solution gas-oil ratio, sm<sup>3</sup>/sm<sup>3</sup>
 
:<math> R_s </math> =  solution gas-oil ratio, sm<sup>3</sup>/sm<sup>3</sup>
 
:<math> SG_g </math> = gas specific gravity, dimensionless
 
:<math> SG_g </math> = gas specific gravity, dimensionless
 
:<math> SG_o </math> = oil specific gravity, dimensionless
 
:<math> SG_o </math> = oil specific gravity, dimensionless
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:<math> \rho_{oR} </math> = oil density at reservoir conditions, kg/m<sup>3</sup>
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:<math> T </math> = temperature, °K
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:<math> \rho_{STO} = SG_o \times 1000</math> = stock tank oil density, kg/m<sup>3</sup>
 
  
 
== References ==
 
== References ==
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  |publisher=Society of Petroleum Engineers
 
  |publisher=Society of Petroleum Engineers
 
  |volume=32
 
  |volume=32
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|issue=06
 
 
  |number=SPE-6719-PA
 
  |number=SPE-6719-PA
 
  |url=https://www.onepetro.org/journal-paper/SPE-6719-PA
 
  |url=https://www.onepetro.org/journal-paper/SPE-6719-PA
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{{#seo:
 
{{#seo:
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|title=McCain Oil Formation Volume Factor equation
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|title=Vasquez and Beggs Oil Compressibility correlation
 
|titlemode= replace
 
|titlemode= replace
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|keywords=oil formation volume factor, petroleum engineering, PVT
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|keywords=oil compressibility, petroleum engineering, PVT
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|description=McCain Oil Formation Volume Factor equation is determined from material material balance equation based on the definition of the oil formation volume factor
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|description=Vasquez and Beggs correlation is an empirical correlation for the oil compressibility published in 1980
 
}}
 
}}

Latest revision as of 07:21, 29 September 2020

Vasquez and Beggs Oil Compressibility correlation

Vasquez and Beggs is an empirical correlation for the oil compressibility published in 1980[1].

Vasquez and Beggs Oil Compressibility correlation in the PVT Software

Math & Physics

c_o = \frac{28.1R_s+30.6T-1180SG_g+\frac{1784}{SG_o}-10910}{10^5P}[2]

Example. Calculation of the oil compressibility

Example source [3]

Input data

R_s = 53.24 sm3/sm3 at P = 10 MPa
T = 90C or 363K
SG_o = 0.85 or 35 API
SG_g = 0.75

Calculate oil compressibility at p = 10 MPa?

Solution

c_o = 0.002907 MPa-1 or 2.95E-4 atm

The solution is available in the online PVT calculator software model at www.pengtools.com

Nomenclature

c_o = oil compressibility, MPa-1
P = pressure, MPa
R_s = solution gas-oil ratio, sm3/sm3
SG_g = gas specific gravity, dimensionless
SG_o = oil specific gravity, dimensionless
T = temperature, °K

References

  1. ↑ Vasquez, M.; Beggs, H.D. (1980). "Correlations for Fluid Physical Properties Prediction"Free registration required. Journal of Petroleum Technology. Society of Petroleum Engineers. 32 (SPE-6719-PA). 
  2. ↑ Afanasyev, Vitaliy; Moskvin, Igor; Wolcott, Ken; McCain, W.D. (2004). "Practical PVT Calculations for black oils". YUKOS publication. 
  3. ↑ Wolcott, Don (2009). Applied Waterflood Field DevelopmentPaid subscription required. Houston: Energy Tribune Publishing Inc. 
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