Page 239 - Formulas and Calculations for Petroleum Engineering

232 Formulas and calculations for petroleum engineering

4.64 Pressure loss due to perforations during hydraulic fracturing

Input(s)
3
ρ: Specific Gravity (lb/ft )
3
q: Real Flowing Rate (ft /s)
2
g c : Unit Conversion Factor (32.2 (lb ft)/(lbf s )
2
A 2 : Fracture Area in time “t” (ft )

Output(s)

ΔP p : Pressure Loss in Sourced by Perforations during Hydraulic Fracturing (psi)

Formula(s)

ρ q 2
ΔP ¼
p 2
1:345 g A
c 2
Reference: Saydam, T., (1967). Principles of Hydraulic Fracturing, ARI Publishing Co., Page: 28.

4.65 Pressure loss due to perforations during hydraulic fracturing—2

Input(s)

ρ: Specific Gravity (lb/gal)
q: Real Flowing Rate (gal/min)
2
A 2 : Fracture Area in time “t” (in )

Output(s)
ΔP p : Pressure Loss in Sourced by Perforations during Hydraulic Fracturing (psi)

Formula(s)

ρ q 2
ΔP ¼
p 2
8090 A
2
Reference: Saydam, T., (1967). Principles of Hydraulic Fracturing, ARI Publishing Co., Page: 30.
4.66 Principal stress due to petro-static pressure (hydraulic fracturing)

Input(s)
3
γ: Average Specific Weight of Formation (p/cm )
h: Depth (m)