Gas reservoir surrounding rock elastic-plastic deformation calculation method

Abstract

This invention discloses a method for calculating the elastoplastic deformation of surrounding rock in a gas storage facility, belonging to the field of compressed air energy storage technology. It solves the problems of low computational efficiency, strong parameter dependence, and neglect of dynamic effects inherent in existing methods that rely on numerical simulation. The method includes obtaining the basic parameters of the gas storage facility, constructing a stress model of the gas storage facility during the inflation and deflation process, obtaining the stress path of the surrounding rock during the inflation and deflation process based on the stress model, and obtaining the stress field function and displacement field function of the gas storage facility based on the stress path of the surrounding rock during the inflation and deflation process, thus completing the stress calculation of the gas storage facility during the inflation and deflation process. This invention avoids the problems of long computation time, slow analysis, and large computational load associated with numerical simulation while ensuring computational accuracy and precision, significantly improving computational efficiency and making it more convenient for engineers to use in the site selection and design of compressed air energy storage facilities.

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