McCain Oil Formation Volume Factor equation

McCain Oil Formation Volume Factor equation

McCain equation is determined from material material balance equation based on the definition of the oil formation volume factor.

File:McCain Oil Formation Volume Factor equation

McCain Oil Formation Volume Factor equation in the PVT Software

Math & Physics

$B_o = \frac{\rho_{STO}+1.22117R_s\gamma_g}{\rho_{oR}}$

Example. Calculation of the oil density

Example source

Input data

$R_s$ = 53.24 sm3/sm3

$SG_o$ = 0.85 or 35 API

$SG_g$ = 0.75

$T$ = 90C or 363K

$P$ = 10 MPa

Calculate oil density at p = 10 MPa?

Solution

$\rho_o$ = 749.645 kg/m3

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

Application range

Description of the Data Used:

$133 \le P_b \le 6,700$

$77 \le T \le 327$

$18 \le R_{sb} \le 1,975$

$0.76 \le SG_o \le 0.95$

$0.556 \le SG_g \le 1.237$

$31.3 \le \rho_{ob} \le 55.77$

Number of data sets = 684

Nomenclature

$B_o$ = oil formation volume factor, rm³/sm³

$R_s$ = solution gas-oil ratio, sm³/sm³

$SG_g$ = gas specific gravity, dimensionless

$\rho_{oR}$ = oil density at reservoir conditions, kg/m³

$\rho_{STO}$ = stock tank oil density, kg/m³