摘要
将盐层作为马克斯威尔体,建立了平面应变问题的粘弹性体力学模型。对均匀和非均匀的应力作用下盐岩蠕变对套管产生的岩压外载进行了分析,编制了相应的、具有友好用户界面的有限元程序,并详细给出有限元计算的步骤及公式推导,获得盐层套管岩压外载的变化规律。最后给出塔里木油田英买力地区第三系盐层在均匀和非均匀地应力条件下盐岩蠕变引起的套管岩压外载实例。该程序能为工程实际应用提供定量的参考依据,具有很好的推广和应用价值。
The salt formation is regarded as Maxwell model, and a viscous elastic mechanical model for plane strain features is established. With the analysis and calculation of the external load acted on casing due to salt formation creep under the in-situ stresses, the variation laws of the external load are achieved. The program of finite element method has been established with friendly interface, and the detailed calculation step and formula deduce are presented. Finally, the examples of external load due to the salt creep in the tertiary of Yingmaili oil field have been performed under heterogeneous and homogeneous in-situ stresses. The results achieved in this study may offer reference to the casing design, and provide quantitative and referential evidence for practical engineering cases.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第15期2741-2745,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
盐膏层
蠕变
套管
岩压外载
有限元计算
Creep
Finite element method
Load testing
Rock mechanics
Salts
Strain
Stresses
Viscoelasticity
