Page 179 - Formulas and Calculations for Petroleum Engineering

172 Formulas and calculations for petroleum engineering

Formula(s)

V DS + V AV
S ¼
O

Reference: Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 104.

2.235 Weight of additive per sack of cement
Input(s)

P a : Percentage of Additive (fraction)
W c : Weight of Cement Per Sack (lb/stroke)

Output(s)
W a : Weight of Additive (lb)

Formula(s)

W ¼ P W
a a c
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition,
Gulf Professional Publishing, Page: 47.

2.236 Weighted cementing calculations

Input(s)
wt: Req. Slurry Density (lb/gal)
SG c : Specific Gravity of Cement (fraction)
CW: Water Req of Cement (gal/stroke)
AW: Water Req of Additive (gal/stroke)
SG a : Specific Gravity of Additive (fraction)

Output(s)
x: Additive Req. Pounds Per Sack of Cement (lb/stroke)

Formula(s)

wt 11:207983
ð
ð
ð
ð
ð
+wtÞ CWÞÞ 94 8:33 CWÞÞ
SG c
x ¼
AW wt AW
1+ wt +
100 ð SG Þ 8:33 100
a
Reference: Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Work-over, Second Edition,
Gulf Professional Publishing, Page: 47.