Page 233 - Formulas and Calculations for Petroleum Engineering

226 Formulas and calculations for petroleum engineering

Formula(s)

∂c a
U ¼ D
a,y A
∂Y

Reference: Williams, B. B., Gidley, J. L., & Schechter, R. S. (1979). Acidizing Fundamentals. Henry L. Doherty Memorial
Fund of AIME, Society of Petroleum Engineers of AIME, Page: 21.

4.51 Maximum treatment pressure (hydraulic fracturing)

Input(s)
P b : Formation Breakdown Pressure (psi)
ΔP h : Hydrostatic Pressure Drop (psi)
ΔP f : Frictional Pressure Drop (psi)

Output(s)
P si : Surface Injection Pressure (psi)

Formula(s)

P ¼ P ΔP + ΔP
si b h f

Reference: Boyun, G., William, C., & Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted
Approach, Page: 17/259.

4.52 Mechanical resistant torque (PCP)

Input(s)
3
V o : Pump Displacement (ft )
ΔP: Pump Head Rating (psi)
e p : Efficiency (fraction)

Output(s)
T m : Surface Injection Pressure (psi)

Formula(s)

ΔP
T ¼ 144 V
m o
e p
Reference: Boyun, G., William, C., & Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted
Approach, Page: 14/214.

4.53 Minimum polished rod load (sucker rod pump)

Input(s)
C: Dynamometer Calibration Constant (lb/in.)
d: Minimum Deflection (in.)