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

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===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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===Solution===
 
===Solution===
:<math>c_o</math> = 0.002912 MPa<sup>-1</sup> or 2.95E-4 atm
+
:<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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:<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
:<math> T </math> =  temperature, K
+
:<math> T </math> =  temperature, °K
  
 
== References ==
 
== References ==

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.