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CT enhanced imaging method and system for three-dimensional structure of natural gas hydrate

A three-dimensional structure and enhanced imaging technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of poor observation and positioning accuracy, little difference in gray scale of CT images, and low observation accuracy of three-dimensional structure of natural gas hydrate

Inactive Publication Date: 2021-01-12
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the above problems in the prior art, that is, in order to solve the problems of poor observation and positioning accuracy and low observation accuracy of the three-dimensional structure of gas hydrate in the prior art due to the small difference in CT image grayscale

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  • CT enhanced imaging method and system for three-dimensional structure of natural gas hydrate

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Embodiment Construction

[0027] In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Example. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0028] A method for enhanced CT imaging of the three-dimensional structure of natural gas hydrates in the present invention is completed based on industrial CT, and specifically includes the following steps:

[0029] Step S100, preparing a liquid interventional tracer and a gaseous interventional tracer, wherein the liquid interventional tracer is obtained by uniformly mixing nitric acid and ...

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Abstract

The invention belongs to the technical field of hydrates, particularly relates to a CT enhanced imaging method and system for a three-dimensional structure of a natural gas hydrate, and aims to solvethe problems of poor observation and positioning precision and low observation precision of the three-dimensional structure of the natural gas hydrate due to small gray difference of CT images in imaging of the three-dimensional structure of the natural gas hydrate in the prior art. According to the CT enhanced imaging method for the three-dimensional structure of the natural gas hydrate, the sediment containing the natural gas hydrate is fully filled with the aqueous solution containing the intervention enhancer, and the intervention tracer dissolved in water improves the mass attenuation coefficient mu / rho difference value of X-rays in the natural gas hydrate, ice, water and methane gas; meanwhile, the X-ray mass energy absorption coefficient muen / rho difference value of the natural gashydrate, ice, water and methane gas is increased, then the linear attenuation coefficient received by the detector is changed, and the imaging resolution of all components of the natural gas hydrate sediment is increased.

Description

technical field [0001] The invention belongs to the field of hydrate technology, and in particular relates to a method and system for enhanced CT imaging of a three-dimensional structure of natural gas hydrate. Background technique [0002] Determining the three-dimensional morphological structure of gas hydrate-bearing sediments is of great significance for revealing the occurrence state and growth and decomposition process of gas hydrate-bearing sediments, as well as for the exploration and evaluation of gas hydrate resources and the study of formation mechanism. X-ray CT imaging technology is a way to directly observe the internal space structure and fracture evolution process of gas hydrate. However, since the densities of gas hydrate, ice, water, and methane gas are very close (the relative density of hydrate is 0.91, that of ice is 0.917, that of water is 1, and that of methane is 0.7), reflected in CT The gray levels of the four in the image are not much different, s...

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Application Information

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IPC IPC(8): G01N23/046
CPCG01N23/046
Inventor 李守定周忠鸣李晓赫建明张召彬郑博毛天桥孙一鸣
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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