Clear brine fluids

The density ladder

Each salt dissolves up to a limit, and each limit sets how heavy a single-salt brine can get. Blending salts lets engineers fill the gaps and push the ceiling higher.

Typical ranges, lb/gal

CaCl₂ (single salt)

up to ≈ 11.6 ppg

CaBr₂ (single salt)

up to ≈ 15.3 ppg

CaCl₂ / CaBr₂ (two salt)

≈ 11.7–15.1 ppg

CaBr₂ / ZnBr₂ (two salt)

up to ≈ 19.2 ppg

ZnBr₂ / CaBr₂ / CaCl₂ (three salt)

up to ≈ 19.2 ppg

Clarity and crystallisation

A brine is only useful if it stays clear. Two numbers matter: turbidity, often stated in NTU, and the true crystallisation temperature (TCT), below which salt begins to form crystals. Cold weather, deep-water seabeds and long storage all push a brine toward its TCT, so formulations are chosen with margin.

• Filter to the clarity your well programme requires.
• Check TCT against the lowest temperature the brine will see.
• Re-check density after dilution or blending.

Blending and adjusting

To raise density, blend with a heavier brine such as calcium bromide or zinc bromide. To lower it, dilute with fresh water. Liquid CaBr₂ at 52% is a convenient base; powder lets you build custom densities on site.

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