Page 294 - Formulas and Calculations for Petroleum Engineering

Fluid flow and transport phenomena formulas and calculations Chapter 5 287

v: Velocity of Fluid (ft/s)
f: Friction Factor (dimensionless)

Output(s)
F k : Fluid Kinetic Force (N)

Formula(s)

2
2
F ¼ p 0:5 R r v f
k
Reference: Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John
Wiley & Sons. Chapter: 3, Page: 110.

5.67 Form drag
Input(s)

R: Radius (ft)
r: Density (ppg)
2
g: Acceleration due to Gravity (ft/s )
m: Viscosity (cP)
v: Velocity (ft/s)

Output(s)
F: Normal Force (N)

Formula(s)

4 3
F ¼ p R r g+2 p m R v
3
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 2, Page: 60.

5.68 Free air correction—Gravity survey

Input(s)
Dh: Elevation change (m)

Output(s)
Dg z : Free Air Correction (mGal)

Formula(s)

Dg ¼ 0:3086 Dh
z

Reference: https://sites.ualberta.ca/ unsworth/UA-classes/210/exams210/210-final-2008-formula-sheet.pdf.