Page 71 - Formulas and Calculations for Petroleum Engineering

64 Formulas and calculations for petroleum engineering

Formula(s)

1:187 5
m ¼ 2:6 p exp 11:513 8:98 10 p
m
p

mo ¼ mod
p b
Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft & Hawkins, Page: 41.

1.147 Viscosity of water at atmospheric pressure—McCain correlation
Input(s)
S: Salinity (% weight by solids)
T: Temperature (F)

Output(s)

m w1 : Viscosity of water (cP)

Formula(s)

^ ^ ^
mw1 ¼ 109:574 8:40564 S +0:313314 S 2+ 8:72213 10 3 S 3Þ
ð
2 4 2
T ^ 1:12166 + 2:63951 10 S 6:79461 10 S 5:47119
3
10 5 S +1:55586 10 6 S 4
Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft and Hawkins, Page: 48.

1.148 Viscosity of water at reservoir pressure—McCain correlation

Input(s)

p: Pressure (psi)
mw1: Viscosity of Water at Atmospheric Pressure (cP)

Output(s)

m w : Viscosity of water at Reservoir Pressure (cP)

Formula(s)

5 9 2
mw ¼ mw1 0:9994 + 4:0295 10 p +3:1062 10 p

Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft & Hawkins, Page: 48.

1.149 Volume of gas adsorbed in coalbed methane reservoirs

Input(s)
V m : Langmuir’s Isotherm Constant (SCF/ton)
b: Langmuir’s Pressure Constant (1/psi)
p: Pressure (psi)

Output(s)

V: Volume of Gas Currently Adsorbed (SCF/ton)