Page 131 - Formulas and Calculations for Petroleum Engineering

124 Formulas and calculations for petroleum engineering

2.114 Initial volume required to achieve a volume with hematite

Input(s)
W 1 : Initial Mud wt. (ppg)
W 2 : Required mud wt. (ppg)
V f : Final Volume (ppg)

Output(s)

V i : Starting Volume (bbl)

Formula(s)

40 W 2
V ¼ V
i f
40 W
1
Reference: Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 84.

2.115 Injection/casing pressure required to open valve

Input(s)
P bt : Bellows or Dome Pressure at Valve Depth (psi)
P 2 : Production or Tubing Pressure at Valve Depth (psi)
2
A p : Area of Valve Port or Seat (in. )
2
A b : Area of Bellows (in. )

Output(s)
P1: Injection/Casing Pressure Existing at the Valve Depth (psi)

Formula(s)

A p
P P
bt 2
A b
P1 ¼
A
p
1
A
b
Reference: Beggs, H. D. 2003. Production Optimization using Nodal Analysis, OGCI and Petroskills Publications, Second
Edition, Chapter 5, Page: 166.
2.116 Input power of a pump—Using fuel consumption rate
Input(s)

Q f : Rate of Fuel Consumption (lbm/h)
H: Fuel Heating Value (BTU/lb)

Output(s)

P i : Input Power (hp)