Three-Dimensional Simulation of the Physical Parameters of Cement Sheath on the Stability of Two Interfaces Cementing

Abstract

Currently, much study on the stability of geological and cement sheath-casing combinations is primarily based on planes, and the established 3D model is just one example. In 3D models, the effect of physical parameters on the stability of composites under triaxial stress has not been systematically investigated. The effect of the physical parameters of the cement sheath (density, modulus and Poisson's ratio) on the Von Mises stress and total displacement of the two interfaces is only studied by establishing a 3D formation cement sheath casing elastic composite model. And it tends to be demonstrated that the density of the cement sheath has no impact on the stability of the formation, the cement sheath and the casing through a large number of experiments and research on actual working conditions. The permanence of the cemented second interface is proportional to the increase in the elastic modulus of the cement sheath Poisson's ratio (0-0.3); The higher the modulus of elasticity of the cement sheath, the less stable the Poisson's ratio (> 0.3) of the cement sheath at the cementing second joint will be; The higher the modulus of elasticity of the cement sheath, the more stable the Poisson's ratio (> 0.3) of the cement sheath at the first cementing boundary will be; The higher the Poisson's ratio of the cement sheath (0-0.3), the less stable the cementing first interface. Through the above studies, in light of the formation pressure, the physical parameters of the formation optimize the performance of the cement sheath and guarantee the perennial completeness of the combination.