摘要
针对油田在开发过程中经常遇到流变性地层的流动导致大量的套管被挤坏的情况,推导了套管水泥环组合体在非均匀载荷下的应力计算公式,并建立了套管水泥环组合体强度模型。以套管内壁的有效应力和组合体工程造价为目标提出了流变性地层套管水泥环组合体的优化设计方法,建立了3种类型的优化数学模型。研究了不同组合条件下的套管水泥环组合体承受非均匀载荷的能力及其相对应的工程造价,优化的结果能够较好地指导套管水泥环组合体的设计。
In view of the fact that a large number of casings are crushed by the flow of rheological formation during the development of oil field,the stress calculation formula of casing and cement sheath combination under non-uniform load was derived,and the strength model of casing and cement sheath combination was established.Aiming at the effective stress of the inner wall of the casing and the engineering cost of the combination,the optimization design method of casing and cement sheath combination in the plastic flow formation was proposed,and three types of optimized mathematical models were established.The ability of the casing and cement sheath combination under different combination conditions to bear non-uniform load and its corresponding engineering cost were studied.The optimization results can better guide the design of casing and cement sheath combination.
作者
肖志强
贾陆锋
温曹轩
赵振允
贾善坡
Xiao Zhiqiang;Jia Lufeng;Wen Caoxuan;Zhao Zhenyun;Jia Shanpo(Geotechnical Mechanics and Engineering Research Center,Yangtze University,Jingzhou 434023,Hubei;Institute of Unconventional Oil&Gas,Northeast Petroleum University,Daqing 163318,Heilongjiang)
出处
《长江大学学报（自然科学版）》
CAS
2020年第1期39-44,I0003,I0004,共8页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金项目“泥岩渗流应力耦合特性及其渗透性演化的自修复效应研究”(41102182)
湖北省自然科学基金项目“多夹层盐穴储气库围岩气压劈裂机理及其密封性研究”(2015CFB194)。
关键词
套管
套管水泥环
抗挤强度
非均匀地应力
优化设计
casing
casing and cement sheath
collapsing strength
non-uniform in-situ stress
optimization design
