采油作业应用井筒完整性标准

The standard of well integrity in production operation

介绍了在采油与注水、抽油等作业中与井筒完整性及井筒屏障有关的要求与标准。采油作业在油藏和井筒整个生命周期中的作业时间很长,它起始于钻井、完井、测试作业之后,结束于油井修井、关停或报废之时。采油作业在油藏全生命周期中的地位及其与相互衔接的有关作业的连贯性特点突出。采油作业特别需要使用和发挥井筒完整性理念,精心设计和使用井筒屏障。使用井筒屏障组件和附加要求、标准建立各种结构的井筒屏障以确保在安全状态下进行采油作业,意义重大。有入流源和油气层的油气井应该用2道或更多道独立的井筒机械屏障。给出了6个典型的采油作业井筒屏障图解来说明井筒屏障的功能和结构组件及其使用标准,介绍了采油作业中的井控作业程序、井筒交接业务及其有关文件,陈述了采油作业中的监管监测和测试工作,并阐述了采油树和采油井口这2个屏障并附图。最后给出了采油树、采油封隔器、井下安全阀和油管挂及其密封塞4个井筒屏障组件验收表。

The requirements and standards pertaining to well integrity and well barrier during oil production,water injection,oil pumping and other operations were firstly introduced.The production operation lasts very long in the whole life cycle of oil reservoir and well.It starts after the well drilling,completion and testing are finished,and ends when the well is worked over,shut down or abandoned.The production operation plays an important role in the whole life cycle of oil reservoir,and presents the remarkable continuity with its concatenate operations.As for production operation,it is particularly necessary to make use of the concept of well integrity and design and utilize well barrier precisely.It is of great significance to establish well barriers with various structures by using the elements of well barrier and the additional requirements and standards to ensure the safety of production operation.The oil/gas wells with inflow source and oil/gas reservoir shall be equipped with at least two independent mechanical well barriers.Then,based on6typical graphs of well barrier for production operation,the function,elements and usage criteria of well barrier were illustrated.In addition,the well control procedures in production operation,the wellbore handover business and the related documents were introduced,and the monitoring and testing during production operation were described.Furthermore,two barriers(i.e.,Christmas tree and production wellhead)were explained and their diagrams were presented.Finally,the acceptance forms of4well barrier elements were listed,including Christmas tree,production packer,downhole safety valve and tubing hanger.