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Nonstationary Temperature Processes Research Equilibrium Degasation of Oil in Well-formation SystemNormal access

Authors: R.F. Sharafutdinov, R.A. Valiullin, T.R. Khabirov, I.G. Nizaeva and I.V. Kanafin
Event name: Saint Petersburg 2018
Session: Well Logging
Publication date: 09 April 2018
DOI: 10.3997/2214-4609.201800109
Organisations: EAGE
Language: Russian
Info: Extended abstract, PDF ( 845.15Kb )
Price: € 20

Summary:
The study of multiphase flows in boreholes is relevant, because in wellbore and formation flows are most often multiphase. The issue of temperature field formation in the well-layer system in conditions of oil degassing remains a little studied for today. Interpretation of temperature surveys in wellbores is performed at a qualitative level, quantitative estimates require the consideration of the influence of a large number of parameters. In oil production practice and during geophysical studies, the pressure in the wellbore may drop below the bubble point pressure. Under these conditions, oil degasses. Therefore, it is urgent to develop a mathematical model for two-phase oil and gas filtration and to study the main features of the temperature field in the "well-formation" system in conditions of oil degassing.In the article, a numerical solution of the system of equations describing the non-stationary motion of carbonated oil in the "well-layer" system is considered. The solution of the system of differential energy equations, mass conservation is made by the control volume method.The sensitivity of the mathematical model to the change in the following parameters has been studied: bubble point pressure, gas concentration, wellhead pressure and degassing heat.


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