BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Metric Conversions
Formulas
• CaCl 2 (g/L) = CaCl 2 (lbm/bbl) × 2.85714
• H 2 O (mL/L) = H 2 O (gal/bbl) × 23.8086
• CaCl 2 (ppm) = % wt × 10,000
• Cl – (ppm) = CaCl 2 (ppm) × 0.639
• mg/L = ppm × specific gravity
• Salt (lb m /bbl water)
• Volume increase factor × CaCl 2 (lb m /bbl)
• Specific Gravity
• 1.0036 [0.99707 + 7.923 (10 -3 )(% wt CaCl 2 ) + 4.964 (10 -5 )(% wt CaCl 2 ) 2 ]
• Volume Increase Factor *
• 1.00293 + 1.04192 (10 -3 )(% wt CaCl 2 ) + 8.94922(10 -5 )(% wt CaCl 2 ) 2
• Aw
0.99989 – 1.39359 (10 -3 )(% wt CaCl 2 ) – 3.50352 (10 -4 )(% wt CaCl 2 ) 2
100% CaCl
% wt CaCl 2
( lb /bbl m
) × % Pur ity CaCl 2
2
= --------------------------------------------------------------------------------------------
S.G × 350
When Using CaCl 2 with Purity other than 95%
New CaCl 2 (lb m /bbl) = 95 x 95% CaCl 2 (lb m /bbl) ÷ % Purity
⎡ NewCaCl
NewCaCl2
,( gal / bbl)
= H
2O,(
gal / bbl)
− ⎢
⎣
Volume increase from salt (gal) = 42 ÷ New water **
Example: 35% CaCl 2 Brine Using 78% CaCl 2
New CaCl 2 (lb m /bbl) = 95 x 172.97 ÷ 78 = 210.67
New H Ogal/bbl
2
( ) = 35.53– 210.67
--------------------------------
– 172.97
= 31.01
8.345
Volume increase from 78% salt = 42 ÷ 31.01 = 1.354
* Volume increase from 100% salt, i.e., from retort
** Volume increase from salt and water in the sacked salt.
2
,( gal / bbl)
− 95% CaCl
8.345
2
,( gal / bbl)
⎤
⎥
⎦
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-56