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Standard test piece based on calibration permeability test

A technology for standard test pieces and permeation experiments, applied in the field of calibrating the accuracy and range of low-permeability experiments, it can solve the problems that the accuracy cannot be accurately explained, cannot be quantified, and relies on experience or repeatability to characterize, so as to overcome the inability to accurately calibrate the range , Solve the effectiveness and reliability problems, the effect of excellent function

Inactive Publication Date: 2009-11-25
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The standard test pieces of the present invention have permeability parameters that can be used as benchmarks. With their permeability coefficients as reference standards, other materials can be accurately described, such as the permeability of rock formation samples and the law of permeability changes, and the permeability measurement method and device can also be clearly calibrated. The accuracy and range of the current penetration test can not be quantified, the accuracy cannot be accurately explained, and it can only be characterized by experience or repeatability.

Method used

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  • Standard test piece based on calibration permeability test
  • Standard test piece based on calibration permeability test
  • Standard test piece based on calibration permeability test

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and implementation example the present invention is further described:

[0031] 1. Description of the structure of the standard test piece

[0032] 1. The shape, size and surface texture of the standard test piece

[0033] Such as figure 1 As shown: end face 1 is vertically connected to side face 2, end face 1 (including the upper end face and lower end face) and side face 2 are smooth and clean, only showing the entire material of the specimen, that is, solid skeleton material, without texture. In fact, the end face 1 is also composed of solid skeleton 3.1, 4.1 and pores 3.2, 4.2. Since the surface of the standard test piece is polished, and the size of pores 3.2, 4.2 is too small, generally controlled within the range of 1-50 μm, so the naked eye Invisible, only visible under magnification or in a microscopic state.

[0034] The surface finish of the standard test piece is required, because the standard test piece is p...

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Abstract

The invention discloses a standard test piece based on a calibration permeability test. The standard test piece is in the shape of a solid cylinder and composed of a solid framework, gaps and pore canals. The solid framework has a firm structure and stably material properties. The material has high rigidity, good toughness, corrosion resistance, rust resistance, heat resistance and pressure resistance. The gaps are near-spherical, the aperture sizes are uniform, and the apertures are controlled in the range of 1-50 microns, the gaps are uniformly distributed inside the test piece and on surface thereof. The pore canals are intersected and the average pore opening extent of the interconnected pore canals passing through two end faces is controlled in the range of 0.1-5% on the cross section. The invention is detected by permeation for a long time, has constant permeability parameters, high efficiency, high reliability and strong practicality. By using the permeation coefficients of the invention as a reference standard, the invention provides a detection method and tool as reference for global permeability test technique. The standard test piece based on a calibration permeability test is applicable to all permeability tests and in particular to the precision and measuring range of a calibration low-permeability testing method and device.

Description

technical field [0001] The invention relates to the technical field of porous medium standard test pieces, and more specifically relates to a standard test piece based on a calibration permeation experiment, which is suitable for calibrating the accuracy and range of a permeation experiment, especially for calibrating the accuracy and range of a low-permeability experiment. Background technique [0002] Permeability is an important property of porous media, and permeability coefficient is a parameter characterizing the permeability of porous media. For a long time, people have gradually recognized and used permeability coefficient parameters to evaluate the permeability of rock formations. Generally speaking, the fields of petroleum engineering and hydrogeology focus on aquifers and reservoir rock formations with high permeability; the fields of seismic and structural geology focus on non-sedimentary rock formations with low permeability; in recent years, more and more resea...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N13/04
Inventor 王颖李小春魏宁
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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