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* Water pressure gradient is estimated from water salinity.
* Water pressure gradient is estimated from water salinity.
* Geostatic pressure gradient is estimated from [[Basic_open_hole_tools#Density|density logs]] or [[porosity]] trend.
* Geostatic pressure gradient is estimated from [[Basic_open_hole_tools#Density|density logs]] or [[porosity]] trend.
* Petroleum density is estimated from the gas-oil ratio (GOR), API gravity, temperature, and pressure.
* Petroleum density is estimated from the gas-oil ratio (GOR), [[API gravity]], temperature, and pressure.
==See also==
==See also==