Page 105 - Formulas and Calculations for Petroleum Engineering

98 Formulas and calculations for petroleum engineering

Formula(s)

ð
ð
P ¼ 0:052 w h +w h +w h h h ÞÞ
a l l t t m w l t
P ¼ 0:052 w h hðð Þ +w h Þ
c m w f t f
P ¼ P P
d a c
Reference: Lyons, W. C., Carter, T., and Lapeyrouse, N. J., 2012, Formulas and Calculations for Drilling, Production and
Workover, Third Edition, Gulf Professional Publishing, Page: 84.

2.54 Dilution of a mud system

Input(s)

V m : Mud in Circulation System (bbl)
F ct : Per cent of Low Gravity Solids in System (per cent)
F cop : Per cent of Total Optimumlow Gravity Solids (per cent)
F ca : Per cent of Low Gravity Solids (Bentonite and or Chemicals Added) (per cent)

Output(s)

V wm : Dilution Water or Mud Required (bbl)

Formula(s)

V F F cop
m
ct
V ¼
wm
F F
cop ca
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 96.

2.55 Direction of dip

Input(s)

h: Height of Fracture (ft)
d:D iameter of Well (ft)

Output(s)

D: Dip Direction (radian)

Formula(s)

h
D ¼ atan
d

Reference: Wikipedia.org.