井下射孔冲击波传递过程及管柱的移动模拟  

Simulation of Shock-wave Transmission and Casing-string Movement for Downhole Perforation

作　　者：张琴[1] 张慢来[1] 周志宏[1] 廖锐全[2] 

机构地区：[1]长江大学机械工程学院,湖北荆州434023 [2]长江大学石油工程学院,湖北武汉430100

出　　处：《长江大学学报（自科版）（上旬）》2015年第2期45-47,4-5,共3页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：高等学校博士学科点专项科研基金(20114220110001);湖北省高校青年教师深入企业行动计划(XD2014076)

摘　　要：为了研究井下射孔作业对管柱轴向移动的影响,基于爆炸冲击波理论,运用瞬态动力学计算软件DYTRAN模拟射孔弹爆炸产生的冲击波传递过程,确定套管柱轴向位移随时间的变化规律。研究结果表明,从井底反射回的冲击波到达井口时,井口处有最大的压力值,当爆炸源的最大瞬时压力为184MPa时,管柱的最大轴向位移可达到0.93m,必须考虑管柱上窜对井口装置的冲击作用。该研究初步探讨的射孔作业对管柱的影响,将为完善管串结构的设计提供合理依据。In order to study the influence of downhole perforating operation on the axial movement of casings,based on the theory of explosion shock wave,the transient dynamics calculation software DYTRAN is applied to simulate the shock wave transmission process produced by the explosion of perforating charges,the changing rules of the axialdisplacement of casings with time is determined.The results shows that the pressure at wellhead is the max when the shock wave reflected from bottomhole reaches the wellhead,and the max axial displacement of string is 0.93 m when the max transient pressure of the explosion source is 184 MPa,and the impact of casing moving up to wellhead equipment must be considered.The effect of perforating operation on the casing is preliminarily studied and it provides a reasonable basis for perfecting the design of casing string structure.

关 键 词：射孔 爆炸 瞬态动力学 冲击波 套管 位移 

分 类 号：TE933[石油与天然气工程—石油机械设备] TE257.1