摘要
超深井射孔完井过程中,射孔瞬间形成的动态载荷对射孔管柱产生影响,严重时会使射孔管柱弯曲、断裂。通过管柱动力学理论分析,利用PulsFrac射孔工程软件对射孔管柱在超深井井况下进行力学仿真。利用ANSYS/LS-DYNA有限元分析软件对射孔管柱进行隐-显动力学分析。认识到射孔管柱受到口袋长度、井液密度、管柱长度、射孔厚度、井深以及枪弹变化等因素影响,射孔时受约束的封隔器下端面处射孔管柱受力最大。提出了提高油气井射孔管柱安全性的6项措施。
In ultra-deep perforating completion process, the formed in instantaneous perforations dynamic load has influence on the perforating string, and causes the string bend and rupture. PulsFrac professional engineering software was used to do perforating string mechanical simulation in ultra-deep well after theoretical analysis of string dynamic mechanism. The perforating string implicit-explicit dynamic analysis was performed by ANSY/LS-DYNA finite element analysis software. It is found that conditions of the perforating string are influenced by the pockets length, well liquid density, string length, perforation thickness, well depth, the bullet changes and so on. The maximum perforating string load is in the lower end of bounded packer. 6 measures to improve the security of perforating string are given.
出处
《测井技术》
CAS
CSCD
北大核心
2010年第5期487-491,共5页
Well Logging Technology
基金
国家科技重大专项"大型油气田及煤层气开发"项目的"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"(2008ZX05046-04)
关键词
石油射孔
超深井
射孔管柱
动态力学
仿真
有限元分析
安全性
petraleum perforation, ultra-deep well, perforating string, dynamic mechanics, simulation, finite element analysis, security
