Method for combined measurement of permeability and porosity of dense rock under dynamic confining pressure

A dense rock and permeability technology, applied in permeability/surface area analysis, suspension and porous material analysis, measurement devices, etc. High, fast measurement results
CN103207138AInactive Publication Date: 2013-07-17HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2013-07-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for combined measurement of permeability and porosity of a dense rock under dynamic confining pressure. A device for realizing the method comprises a confining pressure control device, a rock core pressure chamber, a downstream air cylinder, an upstream air cylinder, a pressure loading device, an upstream air pressure recorder, a downstream air pressure recorder, an upstream-downstream air pressure difference recorder and a computer. According to the method for the combined measurement of permeability and porosity of the dense rock under dynamic confining pressure provided by the invention, few physical quantities need to be measured, the operation is easy, and dynamic measurement of permeability and porosity under complex stress is realized. In addition, the method has the advantages that the measurement time is short and the accuracy is high for dense rocks with a permeability less than 10 to 17m<2> and a porosity less than 1.5%, and can automatically record the test data; the test result is accurate; the test efficiency is improved; and test data under different pressures are obtained to calculate the permeability and porosity at one time.
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Description

technical field

[0001] The invention relates to a method for jointly measuring tight rock permeability and porosity under dynamic confining pressure. Background technique

[0002] With the development of the national economy, the development of underground resources has shifted from shallow to deep rock mining, as well as the construction of hydropower stations and digging tunnels in areas with complex geological conditions. The engineering construction in the above-mentioned areas is faced with the design and construction under complex stress conditions and the long-term stability of the project under seepage conditions. Therefore, how to quickly and efficiently measure the permeability parameters of rocks, such as permeability and porosity, has become an urgent problem to be solved.

[0003] At present, a single method and equipment are mostly used for the measurement of permeability and porosity. For example, a permeameter is used to measure permeability and a porosity m...

Claims

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