油层注水后,地应力会随注水压力的变化而发生改变,进而使套管的受力发生变化,因此引起了套管损坏。该项研究是根据局部区块地层特征,综合考虑油水井分布状态、开发情况等因素,应用有限元分析方法得到区块内地应力分布状况,研究地应力随地层压力变化规律,从而找到套管损坏的根本原因,从而揭示出局部套损机理。 After the reservoir is filled with water, the ground stress changes with the change of water injection pressure, which in turn causes the stress of the casing to change, thus causing casing damage. The study is based on local block stratigraphic features, considering the distribution of oil and water wells, the development situation and other factors, the application of finite element analysis of the stress distribution within the block to study the variation of ground stress with formation pressure to find the casing damage The root cause, thus revealing the partial casing damage mechanism.