中文摘要：

在这份报纸，我们在场为在油井的一个 casing-cement-formation 系统以内评估压力地在下面的一个分析方法各向异性在原处，在岩石形成和制服的压力在 casing 以内迫使。现在的方法享受在原处后来作为起始的压力在形成强调在原处，压力已经在水泥和 casing 的放置前在形成发展成井。经由这个处理，现在的方法在存在方法预言的形成以内排除另外的排水量，这被表明，并且给更合理的压力结果。一口实际的紧密油的井用现在、存在的分析方法，以及有限元素方法被分析。在分析结果和有限元素分析(FEA ) 之间的好同意结果被获得，验证现在的方法。与现在的方法相比，存在方法在 casing 和水泥以内过高估计压缩压力水平，也是明显的。最后，在 casing 以内的压力上的 casing 的形成，水泥和水泥的有弹性的性质的效果与一系列敏感分析被说明。

英文摘要：

In this paper, we present an analytical method for evaluating the stress field within a casing-cement-formation system of oil/gas wells under anisotropic in-situ stresses in the rock formation and uniform pressure within the casing. The present method treats the in-situ stresses in the formation as initial stresses since the in-situ stresses have already developed in the formation before placement of cement and casing into the well. It is demonstrated that, via this treatment, the present method excludes additional displacements within the formation predicted by the existing method, and gives more reasonable stress results. An actual tight-oil well is analyzed using the present and existing analytical methods, as well as the finite element method. Good agreement between the analytical results and the finite element analysis （FEA） results is obtained, validating the present method. It is also evident that, compared with the present method, the existing method overestimates the compressive stress level within the casing and the cement. Finally, the effects of elastic properties of the formation, cement, and inner pressure of casing on stresses within the casing and cement are illustrated with a series of sensitivity analyses.