BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Therefore, 142.9 bbl of 15.1 lb/gal brine blended with 400 bbl of 13.2 lb/gal fluid yields 542.9 bbl
of 13.7 lb/gal fluid.
Decrease Density with Lighter Liquid Brine
1. Determine the following:
D o = Original brine density
D l = Density of lighter brine
D f = Final brine density
V o = Original brine volume
2. From this data, the following additions can be calculated:
Final Volume = V o + volume of light brine
Example
Volumeof light brine
Decrease 400 bbl of 14.5 lb/gal fluid to 13.0 lb/gal with a 9.5 lb/ gal brine.
D o = 14.5
D l = 9.5
D f = 13.0
V o = 400
Vo
=
D
( D − D )
400 14.5 −13.0
Volumeof
brineto add ( 13 .0)
=
= 171bbl
13.0 − 9.5
Final volume = 400 + 171 = 571 bbl.
Therefore, 171 bbl of 9.5 lb/gal brine added to 400 bbl of 14.5 lb/gal fluid yields 571 bbl of 13.0
lb/gal fluid.
Increase Density after Dilution with Fresh Water
1. Determine weight and volume of original system (D o , V o )
2. Determine density of the diluted brine and estimate the volume.
D 1
D d = Density of diluted brine (lb/gal)
f
o
−
f
( )
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-46