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Sodium Chloride
Water Treatment
DESCRIPTION
Sodium Chloride can be used as a weighting agent to increase fluid density to
10.0 pounds per gallon (SG 1.20) maximum.
A sodium chloride based drilling fluid can provide good inhibition against water sensitive clays and shales.
RECOMMENDED TREATMENT
The following table indicates sodium chloride concentrations to obtain a required fluid density.
Concentration
(% weight) |
Density
Specific Gravity |
Chloride
mg/L |
| Fresh Water |
1.00 |
0 |
| 1% |
1.007 |
6,108 |
| 3% |
1.021 |
18,580 |
| 6% |
1.043 |
37,963 |
| 9% |
1.065 |
58,141 |
| 12% |
1.088 |
79,166 |
| 15% |
1.111 |
101,087 |
| 18% |
1.134 |
123,804 |
| 21% |
1.158 |
147,580 |
| 24% |
1.183 |
172,147 |
| 26% (Saturated> |
1.199 |
189,143 |
Note: % by weight is the equivalent of 1% = 10 kgs / m3
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