套管-水泥环-地层应力分布的理论解

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Theoretical solutions of stress distribution in casing-cement and stratum system

摘要: 利用弹性力学理论研究地应力场中套管-水泥环-地层系统应力分布的理论解, 在求解过程中，将原问题分解为两个相对简单的子问题. 考虑到套管井系统是层状结构的特点，且各层受力情况具有相似性，进一步地，基于两个弹性力学平面应变基本问题的解，采用结构力学的求解思想，由位移连续条件分别求得了两个子问题的解，最后由叠加原理得到了原问题的理论解.
- 套管-水泥环-地层系统 /
- 应力分布 /
- 理论解 /
- 平面应变问题 /
- 叠加原理
Abstract: The theoretical solutions of a casing-cement-stratum system in theformation stress field are studied using the elasticity theory. The problem isdivided into two relatively simple subproblems.The cased hole system is a cylindrical layer structure and theloading state of each layer is similar. The solutions of two planestrain basic problems can be used to obtain the analytic solutions oftwo subproblems through the continuity condition of displacement. The theoretical solutionsfor the stress distribution in casing--cement and stratum system arefinally obtained by applying the superposition principle.
- casing-cement and stratum system /
- stress distribution /
- theoretical solution /
- plane strain problem /
- superposition principle