Page 175 - Formulas and Calculations for Petroleum Engineering

168 Formulas and calculations for petroleum engineering

Formula(s)

τ ¼ m dv =drÞ
ð
ð RcÞ z ð RcÞ
1 h n oi dp
2
τ ¼ 2R + R R = R log R =R
2
ð RcÞ c c p c p c
4 dz
Reference: Chin, W. C. (1995). Formation Invasion, Page: 59.
2.225 Volume of cuttings generated per foot of hole drilled

Input(s)
D h : Hole Size (in.)
Ø: Porosity (fraction)

Output(s)
V c : Volume of Cuttings (bbl/ft)

Formula(s)

2
D 1 Øð Þ
h
V ¼
c
1029:4
Reference: Formulas and Calculations for Drilling, Production and Workover (2nd Edition), Page: 18.

2.226 Volume of dilution water or mud required to maintain circulating volume

Input(s)
V m : Volume of Mud in Circulating System (bbl)
F l : % Low Gravity Solids in System (%)
F o : % Optimum Low Gravity Solids Desired (%)
F a : % Low Gravity Solids Added (%)

Output(s)

V wm : Volume of Dilution Water or Mud Required (bbl)

Formula(s)

V F F Þ
ð
V ¼ m l o
wm
F F
l a
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 96.

2.227 Volume of fluid displaced for duplex pumps
Input(s)

D L : Piston Diameter (in.)