@wikipediaConcentration of salt of salt or solid particles in fluid or soil
Weight share of solid particles (usually salt) in fluid or soil.
It is normally measured as the ratio of salt weight to pure fluid/soil weight:
| LaTeX Math Block | ||||
|---|---|---|---|---|
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{\rm Sal} = \frac{\mbox{mass}_{\mbox{salt}}}{\mbox{mass}_{\mbox{pure fluid/soil}}} |
| Symbol | Dimension | SI units | Oil metric units | Oil field units | Additional |
|---|---|---|---|---|---|
Sal | – |
| ‰ | wt% = 0.01 frac = 0.1 ‰ = 100 ppm [1] g/L = 10-3 frac = 10-5 wt% = 1 g/kg = 1 ‰ = 103 mg/L = 103 ppm |
[1],[2]: In engineering practice, the Salinity is often measured in [ g/L ] and [ mg/L ] as equivalent of ppk and ppm correspondingly.
But this is a misnomer as these units have a physical meaning of density while the standard Salinity measure is a dimensionless quantity and frac, wt%, ppk and ppm should be used instead.
The equalities [1] and [2] take the true meaning only when non-saline fluid has a density of 1 kg/L which is close to the distilled water density at Standard Conditions (0.9991 kg/L).
See Also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Fluid (PVT) Analysis
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