Page 70 - Formulas and Calculations for Petroleum Engineering

Reservoir engineering formulas and calculations Chapter 1 63

1.144 Viscosity of dead-oil—Egbogah correlation—P < Pb

Input(s)
r: Density of oil (API)
T: Temp (F)

Output(s)
mod: Viscosity of Dead-Oil (cP)

Formula(s)

mod ¼ 10 10 1:8653 0:025086 * r 0:5644 * log TðÞ

Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft & Hawkins, Page: 41.

1.145 Viscosity of live oil—Beggs/Robinson correlation

Input(s)

mod: Viscosity of dead oil (cP)
R so : Solution oil gas ratio (fraction)

Output(s)
A: Constant A for Beggs Robinson Correlation (fraction)
B: Constant B for Beggs Robinson Correlation (fraction)
mo: Viscosity of Live-Oil (cP)

Formula(s)

0:515
ð
A ¼ 10:715 Rso + 100Þ
0:338
ð
B ¼ 5:44 Rso + 150Þ
mo ¼ A mod B

Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft & Hawkins, Page: 41.

1.146 Viscosity of oil—Vasquez/Beggs correlation—P > Pb

Input(s)
mod: Oil viscosity at bubble point (cP)
Rso: Solution oil gas ratio (fraction)
p: Pressure (psi)
p b : Bubble Point Pressure (psi)

Output(s)
m: Exponential Constant for Beggs Correlation (dimensionless)
mo: Viscosity of Live-Oil (cP)