The process of fluid components exchange between phases to reach chemical equilibrium so that total mass of individual components spread between phases according to ambient pressure  and temperature .


The quantitative measure of exchange is given by cross-phase exchange coefficients.

The most popular cross-phase exchange coefficients are Solution GOR  and Vaporized Oil Ratio  

See Also


Petroleum Industry / Upstream / Subsurface E&P Disciplines / Fluid (PVT) Analysis

Cross-phase fluid exchange @model