Vasquez and Beggs Oil Compressibility correlation

From wiki.pengtools.com
Revision as of 07:14, 29 September 2020 by MishaT (talk | contribs) (Solution)
Jump to: navigation, search

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

Calculate oil compressibility at p = 10 MPa?

Solution

c_o = 0.002912 MPa-1

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.