Page 218 - Formulas and Calculations for Petroleum Engineering

Production engineering formulas and calculations Chapter 4 211

Output(s)

c f : Cumulative Present Value of Production ($)

Formula(s)

k W
f
c ¼
f
k h
Reference: Saydam, T., (1967). Principles of Hydraulic Fracturing, ARI Publishing Co., Page: 92.

4.16 Choke discharge coefficient

Input(s)
d: Upstream Pipe Diameter (in.)
d c : Choke Diameter (in.)
N R : Reynold’s Number based on d c (dimensionless)

Output(s)
C d : Choke Discharge Coefficient (dimensionless)

Formula(s)

0 1

d c B C
0:3167 C
C ¼ B C +0:025 log N Þ 4ð ð Þ
d + B 0:6 R
d @ d c A
d
Reference: Boyun, G., William, C., & Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted
Approach, Page: 5/60.

4.17 Close-ended displacement volume of pipe

Input(s)
D o : Outside Diameter of Pipe (in.)
L: Length of Pipe (ft)

Output(s)

V c : Close-ended Diameter of Pipe (bbl)

Formula(s)

2
V_c ¼ 0:7854 D L =808:5
o
2
0:7854 D L
o
V ¼
c
808:5
Reference: Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015.
Houston, Texas, Page: 45.