动态负压射孔孔道压实带碎屑清洗输送  

CRUSHED ZONE AND DEBRIS BEING WASHED OUT OF PERFORATION TUNNEL IN DYNAMIC UNDERBALANCED PERFORATING

作　　者：曲忠仁 程军[2] 程豪[3] 谢寿昌[3] 彭原平 周绪国 胡洪平[2] 崔之健[4] 

机构地区：[1]中国石油西部钻探工程有限测井公司,克拉玛依834000 [2]华中科技大学力学系,武汉430074 [3]新疆油田开发公司,克拉玛依834000 [4]西安石油大学石油工程学院,西安710065

出　　处：《固体力学学报》2013年第S1期327-330,共4页Chinese Journal of Solid Mechanics

摘　　要：动态负压射孔中通过快速吸收井筒内的残余爆轰能量和液柱压力,使井筒内压力在射孔后瞬间下降,在射孔孔道内部与出口之间产生巨大瞬间压力差.在此压力差作用下,孔道内的射孔压实带和碎屑被高速气流冲洗出孔道.本文通过建立射孔孔道碎屑冲洗输送的数值模型,模拟了碎屑的输运过程.研究了动态负压、碎屑的几何分布等参数对碎屑输运效果的影响.数值结果表明:碎屑输运时间主要集中在压力下降阶段;最大动态负压值越大,最大动态负压出现时间越迟,碎屑输运效果越好.数值结果对指导动态负压射孔工艺设计具有一定指导意义.Dynamic vacuum guns rapidly absorb the remnants of the detonation energy and liquid pressure within the wellbore.Then the pressure within the wellbore instantaneous drop after perforation,enormous instantaneous pressure difference is generated between the internal and export of the perforation tunnels.The high-speed airflow forms under this pressure difference,the pores perforating the crushed zone and debris are being flushed out pores by the high-speed airflow.A numerical model of perforation tunnels debris being washed and transported is established to simulate the transport processes of the debris.The effect on debris transport is studied which is acted by the parameters of dynamic negative pressure,and the geometric distribution of debris.Numerical results show that debris transport time is mainly concentrated in the pressure drop stage;the greater the maximum dynamic pressure value,the later occurrence of maximum dynamic vacuum,debris transport the better.The numerical results are of guiding significance to guide the dynamic underbalanced perforating process design.

关 键 词：动态负压 碎屑输送 压实带 FLUENT 

分 类 号：TE93[石油与天然气工程—石油机械设备]