Page 69 - Formulas and Calculations for Petroleum Engineering

62 Formulas and calculations for petroleum engineering

1.141 Viscosibility

Input(s)
m: Viscosity of displacing fluid (cP)
dm: Change in viscosity (cP)
dP: Change in pressure (psi)

Output(s)

cv: Viscosibility (1/psi)

Formula(s)
1 dm

cv ¼
dP
m
Reference: Petrowiki.org.

1.142 Viscosity of crude oil through API
Input(s)

a: Coefficient (dimensionless)
A: API Gravity (dimensionless)

Output(s)
m: Logarithmic Viscosity (cP)

Formula(s)

m ¼ a 0:035 A

Reference: Campbell, J. M., (1992, Houston, TX (United States)), Gas Conditioning and Processing, Vol. 1, Campbell
Petroleum Series, Page: 74.

1.143 Viscosity of dead oil—Standing’s correlation
Input(s)

API: API Gravity of Oil (API)
t: Temperature (F)

Output(s)
m od : Viscosity of Dead Oil (cP)

Formula(s)
8:33
0:43 +
7 10 API
10 360
m ¼ 0:32 + 1:8
od 4:53
API t + 200
Reference: Boyun, G., William, C., & Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted
Approach, Page: 2/20.