STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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Drilling Muds and Completion Fluids 709
Material requirements for brine solutions are given in Tables 4-63 through 4-65.
Brine-polymer systems are composed of water-salt solutions with polymers
added as viscosifers or filtration control agents. If fluid loss control is desired,
bridging material must be added to build a stable, low permeability bridge that
will prevent colloidal partial movement into the formation.
The polymers used for completion and workover fluids may be either natural
or synthetic polymers. Guar gum is a natural polymer that swells on contact
with water and thus provides viscosity and filtration control; it is used in
concentrations of 1 to 3 Ib/bbl. Guar gum forms a filter cake that may create
Table 4-63
Material Requirements for Preparing Sodium
Chloride Salt Solutions (60°F)
Density Fresh Water Sodium Chloride
Iblgal (gallfinal bbl) (Iblflnal bbl)
8.33 42 0
8.6 41.2 16
8.8 40.5 28
9.0 40.0 41
9.2 39.5 54
9.4 39.0 68
9.6 38.5 82
9.8 38.0 95
10.0 37.5 110
Based on 100% purity.
Table 4-64
Material Requirements for Preparing
Calcium Chloride Solutions (60°F)
Density Fresh Water Calcium Chloride
Iblgal (gaMInal bbl) (IWtlnal bbl)
10.0 39.0 95
10.2 38.5 107
10.4 38.0 120
10.6 37.5 132
10.8 37.0 145
11.0 36.5 157
11.2 36.0 170
11.4 35.5 185
11.6 35.0 197
11.8 34.0 210
Based on 95% chloride.