射孔作业过程管柱结构动态响应分析
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摘要
射孔产生的冲击载荷会使井下管柱发生强烈振动,导致管柱发生弯曲断裂等事故。考虑油套间隙,采用空间梁单元与弹簧单元求解油套之间非线性接触问题,建立了管柱结构动力模型。提取井下射孔压力波监测数据,应用ANSYS软件,编写APDL语言,分析射孔爆轰波作用下油管柱的动态响应,得到了管柱径向位移、接触反力、摩擦阻力、轴力等随井深的变化曲线,以及位移、速度时间历程曲线。由此证明采用弹簧单元来处理油套之间的非线性接触问题的方法是可行的。
The impact load produced by the perforation can make the downhole string generate strong vibration,resulting in string bending and even fracture accidents.Considering the annulus between tubing and casing,using the spatial beam element and spring element to solve nonlinear contact problems between oil jacket,the string structural dynamic model was established.Extracting the monitoring data of downhole perforated pressure wave,using the finite element software ANSYS,and writing APDL language,the dynamic response of the tubing string was analyzed.It easily gets the curve of the radial displacement,the contact reaction force,the friction resistance,the axial force changing with the depth of the well,as well as the displacement,velocity time history curve.Therefore,it is feasible to handle the nonlinear contact problems between oil jacket with spring element.
The impact load produced by the perforation can make the downhole string generate strong vibration,resulting in string bending and even fracture accidents.Considering the annulus between tubing and casing,using the spatial beam element and spring element to solve nonlinear contact problems between oil jacket,the string structural dynamic model was established.Extracting the monitoring data of downhole perforated pressure wave,using the finite element software ANSYS,and writing APDL language,the dynamic response of the tubing string was analyzed.It easily gets the curve of the radial displacement,the contact reaction force,the friction resistance,the axial force changing with the depth of the well,as well as the displacement,velocity time history curve.Therefore,it is feasible to handle the nonlinear contact problems between oil jacket with spring element.
引文
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[2]尹洪东,李世义,张建军.射孔测试联作管柱受力分析及井下仪器保护技术[J].石油钻采工艺,2003,25(3):61-62.
[3]Schatz J F,Folse K C,Fripp M,et al.High-Speed and Accelerometer Measurements Characterize Dynamic Behavior During Perforating Events in Deepwater Gulf of Mexico[C]//SPE 90042,presented at SPE Annual Technical Conference and Exhibition,Houston,2004.
[4]练章华,林铁军,刘健,等.水平井油管柱射孔振动的有限元分析[J].石油钻采工艺,2006,28(1):56-59.
[5]于振东,李艳.试油测试射孔管柱的间隙元分析[J].应用力学学报,2003,20(1):73-77.
[6]张宝增,王瑞和.侧钻水平井钻柱动力学几个关键问题研究[J].石油矿场机械,2006,35(5):9-12.
[7]张洪才,何波.有限元分—ANSYS13.0从入门到实践[M].北京:机械工业出版社,2011.
[8]刘巨保,丁皓江,张学鸿.间隙元在钻柱瞬态动力学分析中的应用[J].计算力学学报,2002,19(4):456-460.
[9]苏华,王光远,张学鸿.细长杆与圆孔孔壁接触碰撞问题的动力间隙元法[J].地震工程与工程振动,1996,16(1):79-85.
[10]凌道盛,徐兴.非线性有限元及程序[M].杭州:浙江大学出版社,2004.
[11]Schatz J F,Haney B L.Ager S A.High-Speed Downhole Memory Recorder and Software Used to Design and Confirm Perforation/Propellant Behavior and Formation Fracturing[C]//SPE 56434,presented at SPE Annual Technical Conference and Exhibition,Houston,1999.
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