A high-temperature and high-pressure seepage corrosion simulation experiment device and method

CN122193072APending Publication Date: 2026-06-12四川越盛能源集团有限公司 +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: 四川越盛能源集团有限公司
Filing Date: 2026-05-08
Publication Date: 2026-06-12

AI Technical Summary

Technical Problem

Existing corrosion simulation devices cannot accurately simulate the actual corrosion of cement rock in downholes, especially the situation where corrosive media seep into the cement rock in the open hole section and seep into the overlapping section of the casing after passing through the lower open hole section, resulting in inaccurate corrosion evaluation results.

Method used

A high-temperature and high-pressure seepage corrosion simulation experimental device is designed. By combining the left and right vessels, the seepage process of the corrosive medium between the surrounding rock, cement stone and casing is simulated to realize dynamic corrosion experiments and simulate the seepage corrosion of the corrosive medium under different temperatures and pressures.

Benefits of technology

It more realistically simulates the corrosion process of downhole cement stone, improves the accuracy of corrosion evaluation and experimental efficiency, and enables multiple sets of experiments to be conducted under different conditions, thereby improving the evaluation of the sealing stability of cement sheath.

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Abstract

The application discloses a high-temperature and high-pressure seepage corrosion simulation experiment device and method, which comprises a left kettle and a right kettle; the left kettle is internally provided with a cavity, and the right kettle is internally provided with a sample placing cavity; the cavity and the sample placing cavity are in a communicating state; a piston is arranged in the cavity, so that the cavity is divided into two cavities; a left cavity away from the sample placing cavity is used for containing constant-pressure pressurized fluid; and a right cavity close to the sample placing cavity is used for storing corrosion medium required for seepage corrosion experiment; the corrosion medium in the cavity can enter the sample placing cavity by driving the piston to move through the constant-pressure pressurized fluid; and the sample placing cavity is sequentially filled with simulation samples along the corrosion medium flowing direction. The application can more truly simulate the actual corrosion condition of well bottom cement stone and the change condition of seepage corrosion speed of corrosion medium in the process of channeling from underground through surrounding rock, cement stone to wellhead by simulating the seepage of corrosion medium from surrounding rock to cement stone.

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