基于Bow-Tie模型的轻尾管固井中悬挂器失效分析

Based on Bow-Tie Model of the Hanger Failure Analysis of Light-liner Cementing

轻尾管固井是一个工艺流程清晰、施工较复杂的动态系统。针对轻尾管固井中的悬挂器失效问题,采用事故树和事件树相结合的分析方法,构建了悬挂器失效的Bow-Tie模型。利用事故树分析法得到了诱发悬挂器失效的原因,通过事件树分析法研究了悬挂器失效后引起事故的全过程,直观地了解轻尾管固井中悬挂器失效的整个发展过程。结合某油田Y井的事故分析,验证了Bow-Tie模型在分析轻尾管固井中悬挂器失效方面是可行的。研究得出的悬挂器失效Bow-Tie模型对于防止悬挂器失效的发生具有重要意义,对于轻尾管固井的现场施工具有指导作用。

Light-liner Cementing is a dynamic systems with clearly technological process and complex construction.For failure research of light-liner hanger cementing process,the hanger failure of Bow-Tie model is constructed,which combine FTA with ETA analysis method.By using faulttree analytic method,the failure reasons of hanger are induced in this paper,the failure cause of the accident after the whole process is studied,through event-tree analysis,which can understand light liner hanger cementing failure intuitively in the whole development process.Combined with certain oilfield accident analysis of Y well,Bow-Tie model is viable for the hanger failure issue based on the analysis of light-liner cementing.Studies show that Bow-Tie model is of great significance to prevent the hanger failure,and has a guiding significance for light-liner on-site cementing operation.