Study on Optimization of the Geometric Structure for Powder Liner in Shaped Charge

Abstract

To obtain a shaped charge with greater penetration and better serve the perforating operation of oil and gas Wells, a geometric structure optimization method based on finite element simulation is proposed in this paper. Firstly, ANSYS/LS-DYNA was used to conduct a dynamic simulation of the process of shaped charge penetrating sandstone, and the influence of the geometry of the powder liner on the perforation depth was systematically analyzed. The geometric structure of the powder liner was optimized using the response surface method and multi-objective genetic algorithm combined with the actual process requirements. Finally, the numerical simulation of the perforation process is carried out based on the optimized geometry of the powder liner, and the simulation results are compared with those before optimization. The results show that the optimized perforation depth can be increased by 14.53% compared with that before optimization, indicating that the optimized perforation geometry can achieve better perforation depth.