Multifunctional multi-field coupled seepage experiment device and testing method

Abstract

The invention discloses a multifunctional multi-field coupled seepage experiment device. The multifunctional multi-field coupled seepage experiment device comprises a device body, a stress field control system, a temperature field control system, a fluid loading control system and a fluid seepage measurement system. The invention further discloses seepage experiments performed on tight gas, shale gas, tight oil, shale oil, natural gas hydrate and geothermal heat in a multi-field coupled state of a temperature field, a stress field, a pore pressure field and a seepage field. The invention has the beneficial effects: the temperature and pressure needs of the tight gas, the shale gas, the tight oil and the shale oil are met, and more importantly, it meets the high temperature need of geothermal heat exploitation can be met while the low temperature need of a natural gas hydrate flow test is met; a real stratum environment is simulated, and the exploitation seepage experiments of unconventional energy resources such as the tight gas, the shale gas, the tight oil, the shale oil, the natural gas hydrate, a dry hot rock and the like can be completed respectively by using the same equipment.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas engineering, in particular to a multi-field coupling seepage multifunctional experimental device and a testing method. Background technique [0002] In recent years, with the in-depth development of the petroleum industry, the exploitation of unconventional energy such as tight gas, shale gas, tight oil, shale oil, natural gas hydrate, and geothermal energy has attracted more and more attention, and has gradually become a hot spot in my country's energy development. . The above-mentioned unconventional energy involves great differences in fluid types, storage medium types, and temperature ranges, and all of them are in the stress field environment formed by formation confining pressure and overlying pressure, which brings great challenges to the design and test methods of related seepage experimental devices. huge challenge. [0003] The patent "multifunctional true triaxial fluid-solid c...

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Problems solved by technology

[0003] The patent "multifunctional true triaxial fluid-solid coupling test system" (application number: 201210231738.X) of Chongqing University Xu Jiang et al. completed the development of the fluid-solid coupling experimental system, but the invention patent lacks a temperature loading and control system, which cannot Simulate the seepage experiment in the real formation environment. The experimental object is limited to coalbed methane, and the seepage of shale gas, tight gas, shale oil, tight oil, natural gas hydrate, and hot dry rock cannot be tested under real formation conditions.

[0004] The patent "A High-temperature and High-pressure True Triaxial Fracturing Seepage Experimental Device for Coal and Rock" (application number: 201510080598.4) by Liang Weiguo and others from Taiyuan University of Technology completed the experimental device for coal-rock seepage under the stress and strain conditions of high-temperature rocks, but the experimental device Lack of low temperature loading and control system, lack of liquid loading and seepage system, so that the experimental device cannot complete the seepage experiments of natural gas hydrate, shale oil and tight oil

[0005] Feng Xiating and Chen Tianyu of Northeastern University completed the design of the high-temperature displacement device in the patent "Gas Shale Stress-Seepage-Temperature Coupling and Displacement Test Device and Method" (application number: 201310172572.3). Low-temperature loading and control system, lack of liquid loading and seepage system, so that the experimental device cannot complete the seepage experiments of natural gas hydrate, shale oil and tight oil

[0006] Southwest Petroleum University Pan Yi et al. in the paten

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