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Device and method for testing permeability of hydrate coal containing gas

A testing device, hydrate technology, applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve changing temperature conditions, uncontrollable hydrate coal body, permeability testing device cannot provide, etc. problems, to achieve the effect of ensuring safe production and reducing the accident rate

Inactive Publication Date: 2019-01-15
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing permeability testing device cannot provide changing temperature conditions, and cannot control the formation of hydrate coal bodies with different saturations, so that the formation conditions and status of hydrate coal bodies cannot be monitored and obtained. Deficiencies in the relationship between permeability changes, providing a gas hydrate-containing coal permeability testing device and method

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  • Device and method for testing permeability of hydrate coal containing gas
  • Device and method for testing permeability of hydrate coal containing gas
  • Device and method for testing permeability of hydrate coal containing gas

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specific Embodiment approach 1

[0034] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. The first aspect of the present invention provides a gas hydrate-containing coal permeability testing device, which combines figure 1 As shown, it includes a hydrate generation unit, a temperature control unit, a water injection unit and a gas cylinder 50. The hydrate generation unit includes a reaction kettle 11, a lower pressure head 12, an upper pressure head 13, a sample tube 14 and an injection pipeline 15. The sample The tube 14 is used to place the coal sample 2, the lower port of the reaction kettle 11 is sealed by the lower pressure head 12, and the upper port is sealed by the upper pressure head 13; the lower center pressure rod 121 of the lower pressure head 12 is inserted into the lower port of the sample tube 14, and the upper pressure The upper center pressure rod 131 of the head 13 is inserted into the upper port of the sample tube 14; the injection pipeline 15 is connected to the sample tube 14 through ...

specific Embodiment approach 2

[0073] Specific embodiment 2. Another aspect of the present invention also provides a method for testing the permeability of gas hydrate-containing coal, which is realized based on the gas hydrate-containing coal permeability testing device. The test method includes:

[0074] Control the axial pressurization pump 60 so that the upper central pressure rod 131 contacts the upper air-permeable steel plate 17, the coal sample 2, and the lower air-permeable steel plate 16 in sequence;

[0075] Pass silicone oil into the reaction kettle 11 through the hydraulic oil pump 81, and make the inner confining pressure of the reaction kettle 11 reach the confining pressure target value through the confining pressure booster pump 80;

[0076] Use the water injection unit to inject a set amount of water into the coal sample 2;

[0077] The gas cylinder 50 is used to continuously inject the gas gas of the target pressure into the coal sample 2, so that the coal sample 2 reaches an adsorption e...

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Abstract

The invention relates to a device and a method for testing the permeability of hydrate coal containing gas. The testing device comprises a hydrate generation unit, a temperature control unit, a waterinjection unit, and a gas cylinder. The hydrate generation unit is used for generating the hydrate coal containing gas under the set condition. The temperature control unit is used for controlling theenvironment temperature in a reaction kettle. The water injection unit is used for injecting water into a sample tube. The gas cylinder is used for providing the gas into the sample tube. According to the device and the method for testing the permeability of the hydrate coal containing gas, by arranging the water injection unit, a gas injection unit and a temperature monitoring unit, the hydratecoal containing gas can be generated in-situ and stable in existence in the reaction kettle; and different amounts of the water can be injected into a coal sample multiple times to measure the permeability of the hydrate coal in different saturation, so that the relation between the gas hydrate coal in the set external conditions and the generating states and the permeability change can be obtained through analyzing and used for the research of coal and gas outburst so as to reduce the accident rate and guarantee the safe production.

Description

technical field [0001] The invention relates to the technical field of coal body permeability measurement, in particular to a gas hydrate-containing coal body permeability test device and method. Background technique [0002] Coal seam gas seepage is an important factor affecting coal seam gas occurrence, migration, extraction, and coal and gas outburst. Therefore, the study of coal seam gas seepage characteristics is of great significance to coal seam gas drainage and mine gas disaster control. The use of gas hydration solidification is an important method to prevent and control coal and gas outburst. The key to the realization of this method is to understand and study the seepage change of gas in the coal body containing gas hydrate after gas hydrate is formed in the coal body, and judge whether the hydration and solidification of the gas has improved and reduced the outburst of coal and gas according to the change of seepage characteristics. of danger. Therefore, it is ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 高霞张保勇杨统川刘传海于洋齐婷婷
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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