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Device and method for quantitative recognition of rock sample of rock mineral by using dual-energy micron CT

A technology for quantitative identification and rock samples, applied in the direction of using radiation for material analysis, etc., can solve the problem of low accuracy in identifying shale minerals in three-dimensional space, and achieve the goal of improving the accuracy of identification, simple production, and improved accuracy of identification. Effect

Active Publication Date: 2017-07-14
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art above, the object of the present invention is to provide a rock sample device and experimental method for identifying shale minerals using dual-energy X-ray micro-CT (sometimes also called micro-X-ray microscope or micro-CT) It has the characteristics of simple sample preparation and no damage to the sample, high accuracy of mineral identification, and can reflect the three-dimensional spatial distribution characteristics of minerals, which solves the technical problem of low accuracy in three-dimensional space identification of shale minerals in the existing technology

Method used

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  • Device and method for quantitative recognition of rock sample of rock mineral by using dual-energy micron CT
  • Device and method for quantitative recognition of rock sample of rock mineral by using dual-energy micron CT
  • Device and method for quantitative recognition of rock sample of rock mineral by using dual-energy micron CT

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Embodiment 1

[0055]This embodiment provides a rock sample device and an experimental method for quantitatively identifying shale minerals with dual-energy micro-CT, including the rock sample device and the experimental method.

[0056] The rock sample device is a small-sized rock sample loading device including shale, three standard samples (quartz, carbonate rock and pyrite), polyimide tube and ab glue;

[0057] The experimental method includes three parts: dual-energy micro-CT high-resolution scanning, dual-energy method to identify real standard minerals (carbonate rock minerals and quartz), and image grayscale segmentation method to identify shale minerals. Finally, shale is identified as quartz, (organic matter + pores), (clay minerals + feldspar), carbonate rock and pyrite, and quantitatively calculate their respective volume percentages.

[0058] First, prepare the rock sample device: figure 1 and is a schematic diagram of the rock sample device, which includes shale, three kinds o...

Embodiment 2

[0070] This embodiment is basically the same as Embodiment 1, the difference is that the rock sample is rectangular, the shale in the rock sample device is located on one side of the rectangular polyimide tube, and the standard sample is placed in the rest of the space.

Embodiment 3

[0072] This embodiment is basically the same as Embodiment 1, the difference is that the rock is sandstone, and the standard sample is minerals such as quartz and feldspar; or fluids such as oil and water; or natural gas, CO 2 Wait for gas.

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Abstract

The invention mainly belongs to the field of petroleum and gas and digital rock physics, and particularly relates to a device and method for quantitative recognition of a rock sample of a rock mineral by using a dual-energy micron CT. The rock sample device comprises a rock sample and a standard sample formed by one or more rock sample components; and the rock mineral is identified by using a dual-energy micron CT rock sample scanning device and a gray-scale segmentation method. The device has the characteristics that sample preparation is simple, a sample is free of an injury, the mineral identification accuracy rate is high, three-dimensional spatial distribution characteristics of the mineral can be reflected, and the technical problem that the accuracy of rock mineral identification in the three-dimensional space is low in the prior art is solved.

Description

technical field [0001] The invention mainly belongs to the fields of petroleum and natural gas and digital rock physics, and in particular relates to a rock sample device and method for quantitatively identifying rock minerals using dual-energy micro-CT. Background technique [0002] In recent years, technological breakthroughs in the United States have enabled the large-scale development of shale oil and gas resources, changing the global oil and energy landscape. my country's shale oil and gas resource reserves rank first in the world. At present, China has realized commercial exploitation of shale gas field in Fuling, Sichuan Basin and other areas, becoming the second country after the United States to realize commercial exploitation of shale gas. Oil and gas resources play an important role in my country's energy security and stability. Identification and quantitative analysis of shale minerals are important contents in shale reservoir geological evaluation, sweet spot...

Claims

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Application Information

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IPC IPC(8): G01N23/04
CPCG01N23/04
Inventor 郝进杨继进周润青
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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