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In-situ adsorption testing device for rock core gas and working method of in-situ adsorption testing device

An adsorption test and gas technology, applied in the field of core gas in-situ adsorption test devices, can solve problems such as inaccurate measurement results

Inactive Publication Date: 2014-08-13
PETROCHINA CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The embodiment of the present invention provides a core gas in-situ adsorption test device and its working method, which solves the technical problem of inaccurate measurement results in the prior art

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  • In-situ adsorption testing device for rock core gas and working method of in-situ adsorption testing device
  • In-situ adsorption testing device for rock core gas and working method of in-situ adsorption testing device
  • In-situ adsorption testing device for rock core gas and working method of in-situ adsorption testing device

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0024] In an embodiment of the present invention, a core gas in-situ adsorption test device is provided, such as figure 1 As shown, the device includes:

[0025] The thermostatic box 27 is used to provide the temperature required for the test. The thermostatic box 27 is provided with a sample tank 21, a first pressure transmitter 23 and a pressure loader 22, and the thermostatic box 27 is provided with a gas Adding device 101 and stress loading device 102, wherein,

[0026] The sample tank 21 is used to place rock core samples to be tested;

[0027] The gas outlet of the gas increasing devic...

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Abstract

The embodiment of the invention provides an in-situ adsorption testing device for rock core gas and a working method of the in-situ adsorption testing device. The device comprises a constant-temperature tank for providing a required testing temperature, wherein a sample tank, a first pressure transmitter and a pressure loader are arranged in the constant-temperature tank, a gas adding device and a stress loading device are arranged outside the constant-temperature tank, and the sample tank is used for containing a to-be-tested rock core sample; the gas adding device is used for injecting testing gas into the sample tank until the pressure in the sample tank reaches a preset testing pressure value; the first pressure transmitter is used for acquiring the pressure and temperature data of the sample tank; the stress loading device is used for supplying pressure to the stress loading device; the pressure loader is used for converting the pressure supplied by the stress loading device into confining pressure and axial pressure which are supplied to the rock core sample in the sample tank. According to the embodiment, the confining pressure and the axial pressure are increased when the temperature and the gas pressure are considered, the test conditions are accordant with in-situ adsorption states of coal rock and shale, so that the accuracy of an adsorption test measuring result is increased.

Description

technical field [0001] The invention relates to the technical field of coalbed gas in-situ adsorption instrument, in particular to a rock core gas in-situ adsorption testing device and a working method thereof. Background technique [0002] Coalbed methane and shale gas are unconventional natural gas in adsorbed, free and dissolved states that exist in coal seams and shale. Among them, adsorbed gas is the most important storage state, and the mechanism is physical adsorption. Physical adsorption is based on the van der Waals force on the particle surface to adsorb surrounding gas molecules. It is a physical adsorption process on the solid surface, which conforms to the Langmuir isotherm equation. In the isothermal adsorption process, the pressure has a significant effect on the adsorption, and the adsorption capacity increases gradually with the increase of the pressure. Accurately testing the adsorption capacity of coal and shale is of great significance to reservoir eval...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 邓泽陈振宏孙粉锦李贵中李五忠孙斌田文广庚勐陈浩陈刚孙钦平
Owner PETROCHINA CO LTD
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