Numerical simulation of flow field and tool structure design in filling and completion of horizontal Wells

Abstract Aiming at the problems of uneven pressure distribution and fluid erosion tools in the process of gravel packing completion in horizontal Wells, numerical simulation of flow field and optimal design of structure of gravel packing tools were carried out. k-ε turbulent flow model was used to simulate the fluid flow in gravel pack, and the distribution of fluid velocity field, pressure field and turbulence intensity and their impact on tool erosion were obtained. The commonly used filling fluid was selected to calculate the flow parameters, and the fluid geometry model was reasonably simplified. The distribution law of velocity, pressure and turbulence intensity of the internal flow field at sections of 20mm and 45mm was obtained. The simulation results were consistent with the impact wear condition of the field test. The research results show that complex eddy current is formed in the position of the sandblasting hole, which has a great impact on the casing wall and the outer side wall of the sandblasting hole, resulting in erosion wear of the tool. By designing a six-hole structure filling server structure and a full-diameter filling device that can reduce the impact effect, the service life of the tool is effectively improved, and good results are obtained in the field application.