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

Revision as of 07:19, 29 September 2020

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

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

^[2]

Example source ^[3]

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?

c_o

= 0.002912 MPa^-1 or 2.95E-4 atm

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

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

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

@@ Line 24: / Line 24: @@
 The solution is available in the online PVT calculator software model at [https://www.pengtools.com/pvtCalculator?paramsToken=de71e4cc29541ab2117e07408864410c www.pengtools.com]
-== Application range ==
-:<math>  2.35 \le R_s \le 322 </math>
-:<math>  0.754 \le SG_o \le 0.989 </math>
-:<math>  0.555 \le SG_g \le 1.245 </math>
-:<math>  21.1 \le T, C \le 160 </math>
 == 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> SG_g </math> = gas specific gravity, dimensionless
 :<math> SG_o </math> = oil specific gravity, dimensionless
-:<math> \rho_{oR} </math> = oil density at reservoir conditions, kg/m<sup>3</sup>
+:<math> T </math> =  temperature, K
-:<math> \rho_{STO} = SG_o \times 1000</math> = stock tank oil density, kg/m<sup>3</sup>
 == References ==