in this paper, the simulation of gas-liquid-solid three-phase flow is carried out by numerical simulation, and the flow velocity, pressure and particle trajectory distribution are obtained. The influence of gas content, sand content and sand shape on multiphase flow is analyzed. The results show that gas content has the greatest influence on multiphase flow. With the increase of the air content in the wellbore, the average velocity and average pressure on the wellhead surface decrease. The simulation results change little with the change of sand content and sand shape.
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