BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Brine Density lb/gal bbl Water/bbl lb Salt/bbl
9.5 .954 65.1
10.5 .904 125
CaCl 2 addition = 400 (---------------------------- .954 )( 125)
– 65.1 = 26,725 lbs
.904
Final volume = 400 .954 --------- = 422 bbl
.904
Therefore, 400 bbl of 9.5 lb/gal CaCl 2 fluid and 26,725 lbs 94-97% CaCl 2 will yield 422 bbl of a
10.5 lb/gal fluid.
Increase Density of a CaCl 2 /CaBr 2 Fluid with Dry Calcium Bromide
1. Determine weight and volume of system to be weighed.
2. Using the data from the formulation tables, determine the following:
Brine Density lb/gal bbl Water/bbl lb 94% CaCl 2 /bbl lb 95% CaBr 2 /bbl
D original W o Cl o Br o
D final W f Cl f Br f
From this data, the required additions can be calculated as follows:
Water addition =
CaBr 2 addition =
V o ( Cl o W f – W o )
--------------------------------------------
Cl f
V o ( Cl o Br f – Br o )
---------------------------------------------
Cl f
Final volume
=
Cl
V o
o -------
Cl f
Example
Increase 400 bbl of 13.4 lb/gal fluid to 14.0 lb/gal with concentrated 95% CaBr 2 .
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-44