A specific case of cross-phase fluid exchange
In BO and MBO PVT models when oil and gas phases reach chemical equilibrium the total mass of oil and gas components spread between oil and gas phases according to ambient pressure and temperature .
Given a mixture of oil and gas under sharing the same volume under pressure
and
temperature with
a the total mass of oil component
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body | m_O = m_{Oo}(p,T) + m_{Og}(p,T) |
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the total mass of of gas component
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body | m_G = m_{Gg}(p,T) + m_{Go}(p,T) |
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wherethen
the mass share of oil component in in oil phase
the mass share of gas oil component in in gas phase
the mass share of gas component in in oil phase
mass share of gas component in in gas phase
...
are all functions of pressure and temperature .
The quantitative measure of cross-phase exchange is given by Soliton GOR () and Vaporized Oil Ration ():