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Device and method for measuring gas permeability of compact material

A gas permeability, measuring device technology, applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc. Uncertainty of sample gas permeability measurement results, etc.

Active Publication Date: 2021-04-09
苏州开洛泰克科学仪器科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in the current measurement method, it is impossible to accurately distinguish the pressure change caused by the sealing ring seam, which makes the measurement result of the gas permeability of the sample too high
In addition, due to the different sealing materials and sealing processes used by the experimental operators in the pretreatment stage, and the different surface quality levels of the samples, the impact of the sealing ring seam on the test results is also unstable, which makes the measurement results of the sample gas permeability higher. uncertainty

Method used

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  • Device and method for measuring gas permeability of compact material
  • Device and method for measuring gas permeability of compact material
  • Device and method for measuring gas permeability of compact material

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Embodiment Construction

[0049]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be understood by those skilled in the art that the drawings are not necessarily to scale. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art fall within the protection scope of the present invention.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc., is based on the attached figure 1 The orientation or positional relationship shown is only for t...

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Abstract

The invention discloses a device and a method for measuring the gas permeability of a compact material. The method comprises the following steps that a gas inlet pipeline is communicated with a gas source device; an upstream cavity is communicated with an air source device through an air inlet pipeline; a downstream cavity is communicated with the air source device through an air inlet pipeline; an upstream pressure sensor is connected with the upstream cavity so as to measure the pressure in the upstream cavity; a downstream pressure sensor is connected with the downstream cavity so as to measure the pressure in the downstream cavity; a clamp is used for placing a test sample assembly and providing radial sealing for the test sample assembly, and the clamp is located between the upstream cavity and the downstream cavity and communicates with the upstream cavity and the downstream cavity; and a piston pendulum mechanism comprises a first piston and a second piston, the first piston is connected with the upstream cavity, the second piston is connected with the downstream cavity, the first piston and the second piston synchronously move to change the volume in the corresponding cavity, and the total volume of the upstream cavity, the clamp and the downstream cavity is kept unchanged.

Description

technical field [0001] The invention relates to the technical field of material gas permeability measurement, in particular to a gas permeability measurement device and measurement method for dense materials. Background technique [0002] Unconventional natural gas resources represented by tight gas, coalbed methane and shale gas are currently the key exploration and development targets of natural gas industries around the world. Gas permeability (or diffusion coefficient) is a key parameter that determines the difficulty of technical exploitation of reservoir gas and the natural gas production rate. The measurement of permeability (or diffusion coefficient) based on the actual rock samples obtained by drilling coring is an indispensable link in the exploration process. Since shale or coal seams are tight rock reservoirs, their gas permeability values ​​are extremely low, and it is a technical difficulty to accurately measure the permeability of such materials. In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 周博陈恺盛尔立
Owner 苏州开洛泰克科学仪器科技有限公司
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