Abstract
Abstract According to the characteristics of offshore wells using Electrical Submersible Pump (ESP), the coupled calculating method is adopted to establish the flow and heat transfer model of wellbore. The flow and heat transfer model is compiled by C language and validated by field measurements. The numerical calculation results show that the factors of marine environment, heat emitted by pump and cable, and the Joule–Thomson effect have significant impact on the wellbore temperature and pressure distribution. When temperature decreases on the condition of low water cut and high gas–oil ratio, the increase of gas–liquid ratio and decrease of density will retard the pressure reduction. However, when the temperature decreases on the condition of high water cut and low gas–oil ratio, decrease of the gas–liquid ratio and increase of density will accelerate the pressure reduction.
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