BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Formulas
• Salt (lb m /bbl water)
Volume increase factor × NaCl (lb m /bbl)
• Specific Gravity
1.0036 [0.99707 + 6.504 (10 -3 )(% wt NaCl) + 4.395 (10 -5 )(% wt NaCl) 2 ]
or 1+ 1.94 (10 -6 )(Cl – , Mg/L) 0.95
• Volume Increase Factor
1.00045 + 2.72232 (10 -3 )(% wt NaCl) + 8.15591 (10 -5 )(% wt NaCl) 2
or 1 + 5.88 (10 -8 ) (Cl – , Mg/L) 1.2
• Aw
0.99755 – 4.3547 (10 -3 )(% wt NaCl) – 1.8205(10 -4 )(% wt NaCl) 2
Density
lb/gal
Specific
Gravity @ 60°F
lbs NH 4 Cl per bbl
Brine
bbls Water per
bbl Brine
% Weight
NH 4 Cl
8.4 1.007 7.0 0.990 1.98
8.45 1.013 10.5 0.981 3.00
8.5 1.020 19.0 0.969 5.30
8.6 1.031 30.0 0.940 8.40
8.7 1.044 42.0 0.919 11.50
8.8 1.055 53.0 0.900 14.40
8.9 1.068 65.0 0.881 17.40
9.0 1.079 77.0 0.860 20.40
9.1 1.128 88.0 0.840 23.00
9.2 1.103 100.0 0.819 25.90
9.5 1.139 135.0 0.750 33.90
Table 6 - 13
Physical Properties of Ammonium Chloride (NH 4 Cl) Solutions
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-54