Numerical simulation of conjugated heat exchange in the turbulent motion of fluid in an oil well

Michael Al’Es,Sergey Makarov,Alexandr Karpov,A Glezer,S Roshchupkin

doi:10.1051/matecconf/202032903013

Abstract

The mathematical model of conjugate heat exchange is proposed for the turbulent movement of reservoir oil in a vertical well section. The motion of the medium is described using a two-dimensional axisymmetric stationary formulation and boundary layer equations. The movement of the turbulent flow of reservoir oil due to reservoir energy is presented. The liquid medium is a mixture of reservoir oil with dissolved gas and formation water. The results of the numerical modeling are presented in the form of dependences of the changing flow rate, temperature, and mass fraction of paraffin deposits that occur along the full vertical extent of the well. The results obtained describe the thermobaric state of the well under the condition of conjugate heat exchange between the fluid flow and the production pipe.

Highlights

Much attention is paid to the problem of the uninterrupted operation of oil wells
The uninterrupted operation of wells is determined by possible deposits of oil components - paraffin deposits - on the inner wall of the well
With further movement of the fluid, the temperature decreases along the well and paraffin deposits are formed; paraffin is mostly deposited on the inner wall of the well

Summary

Introduction

Much attention is paid to the problem of the uninterrupted operation of oil wells. The uninterrupted operation of wells is determined by possible deposits of oil components - paraffin deposits - on the inner wall of the well. This is due to the high temperature in the zone of productive layers, the temperature of which is higher than the melting point of paraffin. With further movement of the fluid, the temperature decreases along the well and paraffin deposits are formed; paraffin is mostly deposited on the inner wall of the well. The problem of determining the intensity of the occurrence of paraffin deposits in a well is an important scientific and technical task

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Conclusion