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 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 phase
and
the mass share of gas oil component in in gas phase phase
the mass share of gas component in in oil phase phase
and
mass share of gas component in in gas phase phase
are all functions of temperature and pressure . and temperature .
The quantitative measure of cross-phase exchange is given by Soliton GOR () and Vaporized Oil Ration ():