摘要
针对石油射孔弹因装药量受限、炸高不足导致射流速度低、侵彻性能差的问题,提出一种基于逆向环形起爆大锥角的新型装药结构并将其应用于石油射孔弹中。通过构建LS-DYNA三维仿真模型,系统研究了爆轰波传播路径调控与药型罩锥角参数对射流质量的影响规律。在仿真过程中,装药大端面处共设置8个均布起爆点,以实现逆向环形爆轰波传播;此外,建立药型罩锥角为80°~110°连续可调的装药模型,开展了不同锥角下射流成形质量以及穿孔孔径和深度的研究。结果表明:采用逆向环形的起爆方式逆转了爆轰波的传播方向,使其近似以平面传播,在提高炸药能量利用率的同时,形成高速射流;当药型罩锥角为90°时,射流头部速度最高可达6603m/s,较传统顶端中心点起爆方式提升约91.6%,穿深约为19倍药型罩口径,证明了逆向环形起爆与大锥角设计的协同作用可以有效平衡射流速度与稳定性,为高密度射孔完井工具的小型化设计提供了理论依据与技术参考。
Low jet velocity and poor penetration performance due to limited charge size and insufficient explosion height are common problems associated with oil perforating charges.To ad-dress these issues,a new charge structure based on reverse annular initiation with a large cone angle was proposed.Using an LS-DYNA three-dimensional simulation model,the influence of detonation wave propagation path control and the cone angle parameters of the liner on jet quality was systematically studied.In the simulation,eight evenly distributed initiation points were set on the large end face of the charge to achieve reverse annular detonation wave propagation.Addition-ally,a charge model with a continuously adjustable cone angle,ranging from 80°to 110°,was es-tablished to investigate jet forming quality,perforation diameters,and penetration depths at vari-ous cone angles.The results show that the propagation direction of the detonation wave is re-versed by the annular initiation method,causing it to propagate approximately in a flat plane.A high-speed jet is formed,improving the energy utilization rate of the explosives.When the cone angle of the liner is increased to 90°,the velocity of the jet head can reach 6603 m/s,approxi-mately 91.6%higher than that of the traditional apical center initiation method.Furthermore,the penetration depth is approximately 19 times the diameter of the liner.These findings demonstrate that the synergistic effect of reverse annular initiation and a large cone angle design can effectively balance jet velocity and stability,providing a theoretical basis and technical reference for the min-iaturization of high-density perforation completion tools.
作者
李巧歌
梁增友
董鹏飞
LI Qiaoge;LIANG Zengyou;DONG Pengfei(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;Shanxi Jiangyang Chemical Co.,Ltd.,Taiyuan 030051,China)
出处
《火箭军工程大学学报》
2025年第4期51-59,共9页
Journal of Rocket Force University of Engineering
基金
山西省2024年度研究生教育创新计划(2024YZ27)
山西省研究生科研创新项目(2024KY592)。
关键词
采油技术
新型石油射孔弹
数值模拟
逆向环形起爆
大锥角药型罩
oil recovery technology
new type of oil perforating charge
numerical simula-tion
reverse annular initiation
large cone angle liner
