摘要
从热力耦合的角度出发对CO_(2)注入井管柱失效机理进行研究,重点解释管柱失效发生在井筒上半段的原因,综合考虑温度对CO_(2)物性和管柱力学性质的影响,使用CO_(2)注入井管柱热力耦合计算模型,模拟不同注入温度下的井筒温度和应力分布,结果表明:在井筒上半段因温度效应导致管柱纵向总应力大于屈服强度,易发生管柱失效断裂。
The failure mechanism of the tubing string for CO_(2)injection wells is studied from the viewpoint of thermal-mechanical coupling,with a focus on explaining why tubing string failure occurs in the upper half of the wellbore.The thermal-mechanical coupling calculation model of the CO_(2)injection well string has been used to simulate the wellbore temperature and stress distribution under different injection temperatures,taking into account the effect of temperature on CO_(2)physical properties and the mechanical properties of the pipe string.The result indicates that due to the temperature effect in the upper portion of the wellbore,the overall longitudinal stress of the pipe string is greater than the yield strength,and the pipe string is prone to failure and fracture.
作者
郑昕
马建杰
姚峰
时维才
崔永亮
ZHENG Xin;MAJianjie;YAO Feng;SHIWeicai;CUI Yongliang(Petroleum Engineering Technology Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China)
出处
《复杂油气藏》
2022年第2期97-100,113,共5页
Complex Hydrocarbon Reservoirs
基金
江苏油田分公司科技攻关项目“CO_(2)注采井管柱失效机理研究与综合防治”(JS21013)。
