Equivalent TOC calculation method based on shale scanning electron microscope image extraction

A scanning electron microscope and calculation method technology, applied in the field of oil and gas geological exploration, can solve the problems of complex processing process, low applicability, long measurement period, etc., and achieve the effects of simple processing process, reduced test cost, and short measurement period

Active Publication Date: 2020-04-17
INST OF MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] (1) Existing shale TOC content extraction methods have inaccurate extraction results and insufficient mining of effective information, making it impossible to accurately evaluate the gas storage capacity and transport capacity of shale reservoirs, which brings great inaccuracy to the research work sex;
[0006] (2) The existing shale TOC content extracti

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  • Equivalent TOC calculation method based on shale scanning electron microscope image extraction
  • Equivalent TOC calculation method based on shale scanning electron microscope image extraction
  • Equivalent TOC calculation method based on shale scanning electron microscope image extraction

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[0060] The following specific examples illustrate the implementation of the present invention. Those familiar with this technology can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention. , Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0061] Such as figure 1 As mentioned, the present invention provides an equivalent TOC calculation method based on shale scanning electron microscope image extraction, which includes the following steps:

[0062] Step S100, sample processing, scanning imaging, and preprocessing the electron microscope image.

[0063] In step S100, it specifically includes:

[0064] In step S101, a sample is selected, and the sam...

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Abstract

The embodiment of the invention discloses an equivalent TOC calculation method based on shale scanning electron microscope image extraction, and the method comprises the following steps: carrying outthe sample processing and scanning imaging, and preprocessing an electron microscope image; threshold segmentation, dividing elements of the shale sample electron microscope image into four components; white edge identification and correction, and extracting organic matter skeleton content; converting two-dimensional plane parameters into equivalent three-dimensional parameters by utilizing dimension raising transformation; and calculating the equivalent TOC content of the shale sample. According to the method, the shale organic matter skeleton content is evaluated by adopting a digital imageprocessing method; the equivalent TOC content of the shale is calculated; the gas storage capacity and the transportation capacity of the shale reservoir can be accurately evaluated, meanwhile, the method is higher in universality, different types of shale samples with different electron microscope scanning imaging qualities can be researched, research is facilitated, in addition, the method is short in measurement period and simple in treatment process, and the test cost can be greatly reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of petroleum and natural gas geological exploration, and in particular to an equivalent TOC calculation method based on shale scanning electron microscope image extraction. Background technique [0002] As a clean unconventional energy source, shale gas has huge reserves. The extraction of shale pore structure characteristics is the basis for accurate reserve evaluation and calculation of pore network migration capacity, and is also the focus of shale gas exploration and development research. The shale has complex composition and well-developed pore structure, and its main components are organic matter, inorganic matter and pyrite. Organic pores and organic cracks develop in organic matter; inorganic pores and inorganic cracks develop in inorganic matter. [0003] The TOC content of shale is generally obtained through combustion test method and well logging method. These are TOC anal...

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Application Information

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IPC IPC(8): G06Q50/02G06T5/00G06T7/136G06T7/187G06T7/62
CPCG06Q50/02G06T7/136G06T5/002G06T7/187G06T7/62G06T2207/20032G06T2207/30181
Inventor 杨明江文滨姬莉莉曹高辉林缅徐志鹏周羁
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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