Multi-scale rock core permeability measurement technology for high-density electrical parameter monitoring

An electrical parameter, high-density technology, applied in permeability/surface area analysis, electrical/magnetic exploration, radio wave measurement system, etc., to achieve the effect of wide application significance

Inactive Publication Date: 2019-06-04
南京九州勘探技术有限公司
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  • Abstract
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  • Multi-scale rock core permeability measurement technology for high-density electrical parameter monitoring
  • Multi-scale rock core permeability measurement technology for high-density electrical parameter monitoring
  • Multi-scale rock core permeability measurement technology for high-density electrical parameter monitoring

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Experimental program
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Embodiment Construction

[0020] (1) Carry out hydraulic experiments under the condition of high-density electrical parameter monitoring

[0021] likefigure 1 As shown, according to the measurement requirements, the electrodes are arranged in high density around the core, and at the same time as the core hydraulic experiment, through the arranged electrodes, the scanning monitoring of electrical parameters such as natural potential, resistance, capacitance, and charging rate between electrodes is performed. Monitoring continues until the infiltrating fluid reaches or even exceeds the point where the underlying electrode is set.

[0022] (2) Extract fluid arrival time

[0023] According to the obtained penetration curve of electrical parameters, the time for the infiltration water body to reach the monitoring position is extracted ( figure 2 and 3 ), calculate the fluid infiltration velocity by the fluid arrival time difference between the monitoring locations, determine the coordinates of the monito...

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Abstract

The invention relates to a multi-scale rock core permeability measurement technology for high-density electrical parameter monitoring, which belongs to the technical field of permeability measurementin the fields such as hydrogeology, geological engineering, petroleum geology, hydrology and water resources, soil science and mineral resources and solves a problem of simultaneously acquiring the comprehensive permeability, the permeability in different scales and directions and the heterogeneous permeability on the same low-permeability rock core. The adopted technical scheme is that the changes of rock core electrical parameters are monitored through dynamic scanning of electrodes arranged on the rock core in high density in a hydraulic experiment to obtain the arrival time of a fluid, therock core permeability is obtained through fitting the simulated fluid arrival time and the measured arrival time, and the heterogeneous permeability field of the rock core is obtained through measuring the arrival time field of the fluid. The multi-scale rock core permeability measurement technology has extensive applications in the permeability measurement of various porous media and the research and application of the heterogeneity, anisotropy and scale effect of the permeability.

Description

technical field [0001] Core permeability is an important parameter describing the ability of rock to allow liquid to pass through. It is obtained through the measurement of core, and is an important parameter in the fields of hydrogeology, geological engineering, petroleum geology, hydrology and water resources, soil science, mineral resources, etc. Basic parameters are important input variables for subsequent simulation calculations. Effective determination of rock core permeability indoors and in situ has not only been an important content of scientific research, but also an urgent need for various engineering applications. The invention proposes a technique for obtaining rock core permeability parameters in different scales and directions based on high-density electrical parameter monitoring, which has wide application significance in scientific research and engineering practice in related fields. Background technique [0002] The permeability of rock core is generally i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01V3/00
Inventor 不公告发明人
Owner 南京九州勘探技术有限公司
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