Page 307 - Formulas and Calculations for Petroleum Engineering

300 Formulas and calculations for petroleum engineering

5.98 Mass absorption (attenuation) coefficient

Input(s)
N: Number of Atoms per Unit Volume (m 23 )
s: Thin Cross Section Expressed in Barns per Atom (1 barn is 10 228 m )(m /atom)
2
2
3
r: Density (kg/m )
Output(s)
a l : Linear Absorption Coefficient (1/m)
2
a m : Mass Absorption Coefficient (m /kg)
Formula(s)

a ¼ s N
l
a l
a ¼
m
r
Reference: Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4.
Chapter 2, Page: 33–34.

5.99 Mass flow rate as a function of the modified pressure drop in a network of tubes
Input(s)

P A : Pressure at A (psi)
P B : Pressure at B (psi)
m: Viscosity (cP)
r: Density (ppg)
L: Length (ft)
R: Radius (ft)

Output(s)
w: Mass Flow Rate (lb/s)

Formula(s)

4

ð
B
A
3 p P P Þ R r
w ¼
20 m L
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 2, Page: 68.
5.100 Mass flow rate in a rotating cone pump

Input(s)
P o : Input Pressure (psi)
P L : Output Pressure (psi)
L: Length (ft)
B: Distance from Centre (ft)