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

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|description=Vasquez and Beggs correlation is an empirical correlation for the oil compressibility published in 1980
 
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Revision as of 07:12, 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
SG_o = 0.85 or 35 API
SG_g = 0.75
\rho_{oR} = 749 kg/m3 at P = 10 MPa

Calculate oil formation oil factor at p = 10 MPa?

Solution

B_o = 1.199 rm3/sm3

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

Application range

2.35 \le R_s \le 322
0.754 \le SG_o \le 0.989
0.555 \le SG_g \le 1.245
21.1 \le T, C \le 160

Nomenclature

B_o = oil formation volume factor, rm3/sm3
R_s = solution gas-oil ratio, sm3/sm3
SG_g = gas specific gravity, dimensionless
SG_o = oil specific gravity, dimensionless
\rho_{oR} = oil density at reservoir conditions, kg/m3
\rho_{STO} = SG_o \times 1000 = stock tank oil density, kg/m3

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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