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A test device and method for gas-bearing shale porosity and adsorption parameters

A technology for shale porosity and adsorption parameters, which is applied in measuring devices, suspension and porous material analysis, instruments, etc. It can solve the error of adsorbed gas volume, the heating and constant temperature of injected gas are not considered, and the instability of gas injection pressure, etc. question

Active Publication Date: 2016-04-20
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

During the test, temperature fluctuations will lead to unstable gas injection pressure, which will cause errors in the test of the amount of adsorbed gas. In previous tests, only the sample was heated, and the heating and constant temperature of the injected gas were not considered.

Method used

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  • A test device and method for gas-bearing shale porosity and adsorption parameters
  • A test device and method for gas-bearing shale porosity and adsorption parameters
  • A test device and method for gas-bearing shale porosity and adsorption parameters

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Embodiment 1

[0096] Such as figure 1 As shown, the test device for gas-bearing shale porosity and adsorption parameters of the present invention includes a constant temperature triaxial pressure chamber, an axial pressure loading system, a confining pressure loading system, an upper end adsorption system, a lower end adsorption system, a vacuum system, a constant temperature system and Data control and acquisition system;

[0097]The constant temperature triaxial pressure chamber includes an axial pressure chamber 14, a confining pressure chamber 19, a self-balancing piston 15, a ball head 16, a spring-type axial displacement sensor 20, a chain-type circumferential displacement sensor 18, two sets of porous gaskets 24, The upper indenter 25, the lower pressure platform 26 and the sample heating device; the axial pressure chamber 14 is set above the confining pressure chamber 19, connected by the self-balancing piston 15, and the self-balancing piston 15 extends into the confining pressure ...

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Abstract

A testing device and method for gas shale porosity and adsorption parameters, belonging to the fields of rock engineering and unconventional natural gas engineering. The testing device for gas shale porosity and adsorption parameters of the present invention includes a constant temperature triaxial pressure chamber, an axial pressure loading system, a confining pressure loading system, an upper end adsorption system, a lower end adsorption system, a vacuum system, a constant temperature system and data acquisition control. system. The testing method of gas shale porosity and adsorption parameters of the present invention realizes the simultaneous testing of shale porosity and adsorption parameters under different temperatures and bias pressure environments and the calculation method of real adsorption amount, and can be applied to deep geostress and high temperature. The environmental axial pressure can reach 300MPa, the confining pressure can reach 100MPa, the injection gas pressure can reach 70MPa, and the maximum temperature can reach 100℃. The maximum sample size is φ50mm×100mm original rock core. It saves nearly three-quarters of the testing time and greatly improves the testing efficiency.

Description

technical field [0001] The invention belongs to the fields of rock engineering and unconventional natural gas engineering, in particular to a testing device and method for gas-bearing shale porosity and adsorption parameters. Background technique [0002] The micro-cracks and pores in gas-bearing shale are the storage space for methane molecules. According to the geological parameters of gas-bearing shale in the United States, 25%-60% of methane molecules are stored in the intergranular pores of the inorganic matrix of gas-bearing shale in a free state. And in natural fractures, 40%-75% of methane molecules exist in the adsorbed state on the surface of organic matter pores such as kerogen and clay particles. The initial high production of gas-bearing shale mainly depends on the free gas in pores and fractures, while the long-term stable production depends on the adsorbed gas in organic matter and clay particles. At present, the exploration and development of shale gas in my...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N7/14
Inventor 冯夏庭陈天宇张希巍张凤鹏李元辉付长剑
Owner NORTHEASTERN UNIV LIAONING
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