Abstract
Temperature prediction of the multiphase flow in wellbore is a foundation for controlling the wellbore pressure, while the convective heat transfer coefficient is one of the key parameters for calculating wellbore temperature. In this paper, the heat transfer for the single phase flow and gas-liquid two phase flow in wellbore was investigated experimentally. A series of new correlations of calculating the convective heat transfer coefficient for various flows (including single flow, bubbly flow, intermittent flow and annulus flow) were proposed, which show a better agreement with the experiments than the other model. Moreover, the wellbore temperature was analyzed using modified heat transfer model. The effects of drilling fluid displacement, inlet temperature, geothermal gradient and formation gas intruding velocity on wellbore temperature were obtained, which can support the wellbore pressure control during drilling and production.
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