Anisotropic large-size artificial core preparation device and method

By simulating the coupled environment of axial pressure, confining pressure, pore pressure and temperature, large-size anisotropic artificial rock cores were prepared, solving the problem that existing technologies could not meet the experimental requirements of deep strata, and realizing the matching of rock core properties with real rocks and the simulation of multiple rock types.

CN120992280APending Publication Date: 2025-11-21INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202511094039.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-06
Publication Date
2025-11-21

AI Technical Summary

Technical Problem

Existing technologies are insufficient to prepare large-size anisotropic artificial rock cores that meet the needs of deep strata experiments. They cannot simulate the diagenetic process of deep rocks under coupled environments such as geostress, pore pressure, and chemical behavior. Furthermore, existing methods cannot represent the actual rock structure and properties.

Method used

A device comprising a triaxial loading device, a heating system, a pore pressure loading system, a confining pressure loading system, and a data acquisition system is used to prepare large-size artificial rock cores by simulating a coupled environment of axial pressure, confining pressure, pore pressure, temperature, and chemical behavior. Multiple molding spaces are formed by separating the spacers inside the molding cylinder, and mixtures with different mineral compositions and particle size distributions are configured.

Benefits of technology

The process of real rock formation was successfully simulated, and large-size anisotropic artificial rock cores suitable for various rock types were prepared. These cores can simulate the mineral and oil and gas evolution processes of uranium-bearing sandstone, shale, carbonate rocks, etc. under different temperatures and pressures, and provide sample analysis.

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Abstract

The invention discloses an anisotropic large-size artificial rock core preparation device and method. The device comprises a forming system used for providing a rock core forming environment, an axial pressure loading system used for simulating rock core stratum axial pressure, a confining pressure loading system used for simulating rock core stratum confining pressure, a pore pressure loading system used for simulating rock core stratum pore pressure and a heating system used for simulating rock core stratum temperature. The collecting and metering system is used for collecting discharged pore pressure fluid and respectively metering a gas phase and a liquid phase, the data acquisition system can acquire various information during preparation, and the control system is used for controlling the systems to work according to data fed back by the data acquisition system so as to simulate the diagenesis process of natural rock and recording and analyzing the data. According to the invention, a coupling environment of a real rock diagenesis process can be simulated, and anisotropy and reservoir heterogeneity can be simulated.
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