Simulation apparatus and method for researching permeability of coal rock

A technology for simulating device and permeability, which is applied in permeability/surface area analysis, measurement device, suspension and porous material analysis, etc. It can solve the problem of poor sealing effect of stress loading cavity, poor sealing performance of stress loading cavity, and easy influence on coal and rock sealing. Environmental problems, to achieve the effect of a good sealing environment

Active Publication Date: 2017-02-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, after the stress loading shaft for movement is provided in the stress loading chamber, it is easy to cause poor sealing effect of the stress loading chamber
That is, it is easy to affect the sealing environment of coal rock
[0004] Therefore, how to solve the problem of poor sealing of the existing stress loading chamber is a technical problem to be solved by those skilled in the art

Method used

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  • Simulation apparatus and method for researching permeability of coal rock
  • Simulation apparatus and method for researching permeability of coal rock
  • Simulation apparatus and method for researching permeability of coal rock

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing.

[0030] like figure 1 and figure 2 As shown, the simulation device for studying coal rock permeability of the present invention includes a stress loading chamber 1 for containing coal rock 106 , and a sealing sleeve 105 and a stress loading shaft respectively arranged in the stress loading chamber 1 . The sealing sleeve 105 forms a sealed cavity for setting the coal rock 106, so as to be able to simulate the permeability of the coal rock 106 in a sealed state. The stress loading shaft exerts stress on the coal rock 106 by extruding the sealing sleeve 105, thereby simulating the permeability of the coal rock 106 under formation pressure. By setting in the above way, the environment where the coal rock is located can be better sealed, and when studying the permeability of the coal rock 106, it is closer to the actual situation in the formation, so that the simulation device...

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Abstract

The present invention relates to a simulation apparatus and a method for researching the permeability of coal rock. The simulation apparatus comprises: a stress loading cavity; a sealing sleeve configured into a sealing cavity for arranging coal rock; a fluid container communicated to the sealing cavity; and a stress loading shaft arranged in the stress loading cavity and used for applying stress on the coal rock by extruding the sealing sleeve. According to the present invention, with the simulation apparatus, the condition close to the actual situation in the stratum during the research of the permeability of the coal rock can be achieved, and the influence of the matrix desorption shrinkage, the fracture closure and the combination of the matrix desorption shrinkage and the fracture closure on the permeability change under the stress anisotropy simulating condition during the discharging-extracting process can be respectively and quantitatively measured, such that the stimulated measurement of the coal rock directional permeability and the dynamic process of the coal rock directional permeability change along with the pore pressure reducing during the discharging-extracting process can be achieved.

Description

technical field [0001] The invention relates to the technical field of coal-rock mining research, in particular to a simulation device and method for studying coal-rock permeability. Background technique [0002] Due to the complexity of coalbed methane mining and the gradual emergence of many problems in the mining process, reasonable simulation and understanding of the desorption, diffusion and seepage processes in the reservoir are the key to the efficient mining of coalbed methane. At present, coalbed methane mining research is usually carried out by studying the permeability of coal rocks. [0003] At present, a simulation device for studying the permeability of coal rocks includes a stress loading chamber for setting coal rocks, a fluid container communicated with the stress loading chamber, and a stress loading shaft arranged in the stress loading chamber. When the permeability of the coal rock needs to be measured, the coal rock is firstly pressurized through the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 柯文奇石在虹张汝生谢先平牛骏李鑫
Owner CHINA PETROLEUM & CHEM CORP
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