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 patent "a kind of supercritical CO 2 with CH in shale 4 Competitive adsorption test device and its test method" (application number: 2015109996370), completed the design of the competitive adsorption test device, but the device lacks an axial pressure loading system, and cannot monitor and measure the radial and axial stress of the rock sample. Therefore, it is impossible to complete the seepage experiments of shale gas, tight gas, shale oil, tight oil, natural gas hydrate, and hot dry rock under the action of stress field

[0007] For tight gas, shale gas, tight oil, shale oil, natural gas hydrate, and geothermal multi-field coupled seepage tests, the above invention has the following problems: (1) Artificial cores cannot truly simulate the internal conditions of formation rock samples; ( 2) The experimental function is single. For shale gas, or shale oil, or natural gas hydrate, or geothermal resources, each experimental object needs a set of special equipment for experimentation, and the test cost is high, the test cycle is long, and the equipment takes up a lot of space (3) There is a lack of a device for exploring the physical properties of underground reservoirs under simulated three-dimensional stress conditions; (3) It cannot meet the low and high temperature requirements of natural gas hydrate and geothermal seepage experiments

Because the existing equipment does not have the above-mentioned components, it is difficult to realize the seepage test of gas, liquid, high-temperature fluid and low-temperature fluid at the same time, and it is also impossible to carry out shale gas, tight gas, shale oil, tight oil, and natural gas hydration in the same device. Seepage test of material and hot dry rock

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