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Nuclear magnetic resonance instrument probe auxiliary device for carrying out steam saturation on porous media

A porous medium, nuclear magnetic resonance technology, applied in the direction of using nuclear magnetic resonance for analysis, etc., can solve the problems of difficult, inaccessible water-saturated devices, and reduced nuclear magnetic resonance detection accuracy, and achieve the effect of improving detection accuracy and accuracy.

Inactive Publication Date: 2013-03-06
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003]However, for low-porosity coal rock samples, it is difficult or even impossible for conventional water saturation devices to enter the pores of the sample, resulting in incomplete saturation
This will lead to a decrease in the accuracy of MRI detection

Method used

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  • Nuclear magnetic resonance instrument probe auxiliary device for carrying out steam saturation on porous media
  • Nuclear magnetic resonance instrument probe auxiliary device for carrying out steam saturation on porous media

Examples

Experimental program
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Embodiment

[0019] Example: such as figure 1 As shown, the present invention includes a probe tube, a vacuum pump 1, a water tank and a saturation device 9, and a heating device 10, and also includes an air duct channel connecting each module, as well as an airtight valve and temperature and pressure sensors; but does not include the nuclear magnetic resonance instrument A permanent magnet 3, a magnet module casing 4, and a rock core sample 7 as a detection object.

[0020] The outer wall 5 of the probe tube is made of vacuum insulation foam plastics.

[0021] A first airtight control valve 2 is provided between the probe tube and the vacuum pump 1; a second airtight control valve 8 is provided on the gas-saturated inlet pipe 11, and a temperature and pressure sensor 14 is provided in the probe tube to ensure that the probe tube The internal pressure and temperature meet the experimental requirements.

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Abstract

The invention discloses a nuclear magnetic resonance instrument probe auxiliary device for carrying out steam saturation on porous media. The device comprises a probe tube internally filled with porous media samples, wherein a vacuum pump is connected above the probe tube; a water tank, a saturation device and a heating device are connected under the probe tube; the water tank and the saturation device are heated by the heating device and then convey steam into the probe tube; and the vacuum pump can be used for vacuuming the samples in the probe tube, so that air, liquid and impurities in pores of the samples are cleaned. Compared with a traditional nuclear magnetic resonance core detection device, through saturation of the steam, the problem of insufficiency in saturation of fine pores of the samples is solved. Due to the design of the saturation device, the heating device and the vacuum device connected with a probe, the temperature and a sealing state of the samples in an experiment process are ensured, and the detection precision and the accuracy of nuclear magnetic resonance on the core samples are promoted.

Description

technical field [0001] The invention relates to a matching device for a probe of a nuclear magnetic resonance instrument capable of saturating a porous medium with water vapor. Background technique [0002] Coal rock and other porous media composed of various organic matter, inorganic minerals and pores and fissures, when using NMR methods to study the porosity, permeability, saturation and pore distribution, it is necessary to use conventional NMR spectroscopy and imaging analysis different methods. Since the sample itself does not generate NMR signals, the experimenter must evacuate the gas, liquid and impurities in the sample pores, inject distilled water and seal it. After completing the above pretreatment steps, reliable experimental data can be obtained. [0003] However, for low-porosity coal rock samples, it is difficult or even impossible for conventional water saturation devices to enter the pores of the sample, resulting in incomplete water saturation. This will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
Inventor 姚艳斌杨培强刘俊刚吴建国唐一龙齐胜喜
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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