Page 73 - Formulas and Calculations for Petroleum Engineering

66 Formulas and calculations for petroleum engineering

Formula(s)

ð r r Þ g k t BT f m
v
o
w
t ¼
d
m ø h
o
e
Reference: Bournazel, C., Jeanson, B. 1971. Fast Water-coning Evaluation Method. SPE AIME, New Orleans, Louisiana.
1.152 Water breakthrough correlations in vertical wells—Sobocinski and Cornelius
Input(s)

h: Oil Column Thickness (ft)
h t : Height of the Apex of the Water Cone above the Average Water-Oil Contact (ft)
k v : Vertical Permeability (mD)
k h : Horizontal Permeability (mD)
r w : Water Density (g/cc)
m o : Oil Viscosity (cP)
r o : Oil Density (g/cc)
q o : Oil Production Rate (STB/D)
B o : Oil Formation Volume Factor (RB/STB)
a: Constant Value of 0.5 for M<1 and 0.6 for M between 1 and 10 (RB/STB)
M: Water Oil Mobility Ratio (fraction)
t: Breakthrough Time (days)
ø: Porosity (fraction)

Output(s)
Z: Dimensionless Cone Height (feet)
t D : Dimensionless Breakthrough Time (days)

Formula(s)

0:00307 r r Þ k h h t
ð
o
h
w
Z ¼
m q B
o o o
0:00137 r r Þ k 1+ M Þ t
ð
a
ð
h
w
o
t ¼
D
k
m ø h h
o
k
v
Reference: Sobocinski, D.P., Cornelius, A.J. 1965. A Correlation for Predicting Water Coning Time. SPE ATCE, Houston,
Texas.
1.153 Water content of sour gas
Input(s)
y: Mole Content of Hydrocarbon (fraction)
Whc: Water Content of hydrocarbon Part (fraction)
yco: Mole Content of Carbon Dioxide (fraction)
Wco: Water Content of Carbon Dioxide (fraction)
yhs: Mole Content of Hydrogen Sulfide (fraction)
Whs: Water Content of Hydrogen Sulfide (fraction)