油藏物理学一地层水的高压物性 1.salinity/saltiness salinity expresses the how many salt formation water contains.Unit:mg/L or ppm 2、hardness hardness is the content of calcium,magnesium and other bivalent cation in formation water.油藏物理学——地层水的高压物性 1﹑salinity/saltiness salinity expresses the how many salt formation water contains. Unit: mg/L or ppm 2﹑hardness hardness is the content of calcium, magnesium and other bivalent cation in formation water