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physical сhemical substance consisting consisting of one or more chemical components which which:
The contact between two phases provides the interface for exchanging of chemical components to reach the thermodynamic equilibrium specific to the given temperature, pressure and the Fluid Composition. The total mass of chemical components in in all adjacent phases remain constant over time but at certain temperature and pressure values some phases may disappear (due to migration of their chemical components to the bordering phases). Phases are not always continuous in space. For example, gas bubbles are not connected to each other but may move at the same speed which is different to the hosting liquid speed and they do represent a separate phase with a inter-phase contact surface comprised of a sum of all bubbles' surfaces. The most popular appearance of phase segregation is water, oil and gas – all are moving at different speeds in porous reservoir or wellbore or pipelines. |
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