摘要
超深井射孔完井常采用射孔、测试、酸化三联作工艺技术,作业管柱通常包括射孔器材、封隔器、测试工具等井下工具,射孔瞬间形成的动态载荷对作业管柱产生影响,可能使射孔管柱发生弯曲、断裂等。为此,采用理论经验公式和ANSYS/LS-DYNA有限元分析软件,并结合有效的动态载荷对射孔管柱加载冲击载荷进行动力学模拟分析,开展了不同射孔管柱长度、管柱厚度以及距离约束端长度等管柱力学模拟分析。结果表明:作业管柱长度越长、射孔厚度越厚、距离约束端长度越长其有效应力越小,整个井下管柱系统越趋稳定。通过射孔冲击载荷对作业管柱的影响分析,总结出了有效缓解射孔管柱冲击的方法,减少射孔工程井下事故,从而提高油气井射孔完井的安全。
The process technologies like single-trip TCP,acidizing-DST are commonly adopted in the ultra-deep well perforation completion.Downhole tools,such as perforating equipment,packer,and test tools,compose the operation string.The dynamic loads during perforating will do such damage to the operation string that they may cause it to bend or break.Based on the theoretical and empirical formulas and the ANSYS/LS-DYNA finite element analysis software,simulations and analysis are carried out on the string mechanics and impact load on the perforating string with different perforating string length,string thickness and side length of distance constraints.The results show that the longer the operation string,the thicker the perforation and the farther the distance from the binding side,the smaller the effective stress and the more stable the entire downhole string system.Through the above analysis of the perforation impact load on the operating string,an effective way to mitigate the impact on the perforating string is proposed,which will help guarantee the safety during the perforating completion in oil gas wells.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2010年第5期61-65,共5页
Natural Gas Industry
基金
国家科技重大专项"大型油气田及煤层气开发"项目"超深超高压高温油气井试油
完井及储层改造配套技术研究"(编号:2008ZX05046-04)
关键词
射孔
冲击载荷
管柱
等效应力
工艺
影响
事故
对策
perforation,impact load,perforating string,ANSYS/LS-DYNA,equivalent stress,countermeasure
