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sci.formation-water-salinity Calculator
Calculates formation water salinity, specific gravity, and resistivity from ion concentration data for petrophysical analysis. Formation water resistivity Rw is used in Archie's equation for water saturation — brine density increases 0.82 kg/m³ per 1 g/L total dissolved solids.
Inputs
Nacl Mg L
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Cacl2 Mg L
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Mgcl2 Mg L
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Temp C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Results
total dissolved solids TDS (mg/L)
The combined total across all inputs and components.