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Carbonaceous shale isothermal adsorption/desorption experimental device

A technology of isothermal adsorption and experimental device, applied in the direction of analyzing materials and instruments, it can solve the problems that affect the reliability of experimental results, and cannot measure isothermal adsorption/desorption curves, so as to achieve less data processing and calculation workload, and ensure reliability. , to ensure the effect of loading accuracy

Inactive Publication Date: 2013-06-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, the existing experimental devices in China cannot realize the true simulation of formation conditions, that is, they cannot measure the isothermal adsorption / desorption curves under the conditions of real coal shale reservoirs under the coupling of multiple fields such as in-situ stress field and temperature field, which further affects the experimental results. credibility of the results

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  • Carbonaceous shale isothermal adsorption/desorption experimental device

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples, but the implementation scope of the present invention will not be limited.

[0016] The operation process of the present invention is explained below by taking the isothermal adsorption / desorption experiment of methane (purity>99.99%) in a coal sample in the southern Qinshui Basin as an example.

[0017] see figure 1 , first put the drilled raw coal coal sample of Φ50×100mm in a constant temperature and humidity box saturated with water for testing. Put the coal rock or shale sample test piece into the true triaxial core clamping and pressurizing system 12; turn on the power supply of the thermostat 13, set the experimental temperature at 23°C according to the actual formation temperature, and monitor the core clamping by the system temperature sensor 14 the temperature in the holder; and empty the triaxial pressure chamber of the true triaxial co...

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Abstract

The invention provides an experimental device for testing adsorption / desorption amounts of gas on carbonaceous shale and adsorption / desorption curves. The device is mainly composed of real triaxial core clamping and compression system, a system pressure sensor, a system temperature sensor, an inlet end high-grade pressure gauge, an inlet end high-precision gas mass flow meter, an outlet high-precision gas mass flow meter, a vacuum pump, a high pressure helium tank, a high pressure to-be-measured gas cylinder, a thermostat, a corresponding pipeline and a valve. A carbonaceous shale test piece is placed in the real triaxial core clamping and compression system. An initial measuring condition of the test piece is set according to a real formation condition. After free pore volume is set, an adsorption / desorption test of the test piece is performed. According to a gas cumulative discharge value and a balanced system pressure value which are measured and recorded by the inlet end high-precision gas mass flow meter or the outlet end high-precision gas mass flow meter end and the system pressure sensor, adsorbed gas volume is calculated so that the isothermal adsorption / desorption curve of the carbonaceous shale test piece is drawn.

Description

Technical field: [0001] The invention relates to an experimental device for measuring the gas adsorption / desorption amount and adsorption / desorption curve on the surface of coal shale, especially for measuring the gas adsorption / desorption amount and the adsorption / desorption amount on the surface of coal shale under different ground stresses, different temperatures and other real stratum conditions. Experimental setup for desorption curves. Background technique: [0002] At present, the experimental methods for measuring the isothermal adsorption / desorption curve of gas in coal shale mainly include pressure method, volumetric method and gravity method. The pressure method is the most commonly used method at present, and its experimental equipment is mainly composed of a gas cylinder, a vacuum pump, a reference cylinder, a sample cylinder, a pressure gauge, and a constant temperature oil bath (or constant temperature box). The pressure method is currently the most widely us...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/00
Inventor 冯其红张先敏张纪远李晓东王建强赵希春李加祥
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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