射流着靶角度对射孔弹性能的影响-《油气井测试》

文章信息/Info

Author(s):: XU Zhiguo; QIAO Yabo; Perforating Equipment Co., Ltd., Daqing Oilfield, Daqing, Heilongjiang 163853, China

Keywords:: target angle; jet; oblique penetration; penetration depth; hole; shaped charge

perforator; target

摘要:: 为分析聚能射孔弹爆轰后形成射流着靶角度的变化对定方位、定射角和定面等个性化射孔新技术的影响

，探索了射孔穿深下降的原因，根据射流侵彻基本理论，从射流微元形态对侵彻性能影响分析入手，结合三维仿真模拟计算和打靶试验，分析了射流着靶角度对射孔弹

性能的影响。当射流不垂直于靶体侵彻时，射流会发生颤动并偏离运动轴线，使得射流侵彻性能下降，且随着角度的增大，射流侵彻性能下降的趋势也会加大。结果表

明，改变布弹角度可以适应油层分布、减少地应力的影响，同时也会造成聚能射孔弹穿孔性能的下降。在射孔方案中涉及倾角变化时，射孔弹的设计应尽可能减少射流

倾角变化的影响。

Abstract:: The cause of the penetration depth reduction was investigated by analyzing

the influence of jet target angle in shale charge perforation on the new perforation techniques such as orientation, fixed angle and fixed

surface. According to the basis theory of jet penetration, the influence of jet target angle on the perforating charge performance was studied

from the effect of jet microelement morphology on penetration performance by combining with 3D simulation calculation and target test. The

result indicates that the jet penetration will vibrate and deviate from axis in case of nonvertical target penetration, which results in a

reduction of jet penetration performance. The jet penetration performance decreases greatly with the increase of target angle. The results show

that changing the target angle can adapt to the distribution of oil reservoir and reduce the influence of insitu stress, and at the same time it

will cause the decline of perforating performance of shaped charge perforating projectile. When the change of inclination is involved in the

perforating scheme, the design of perforating projectile should minimize the influence of the change of jet inclination.