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Metamorphic rock quantitative identification method based on diagenetic indication elements

A technology indicating elements and identification methods, applied in geophysical surveying, special data processing applications, instruments, etc., to achieve the effect of quantitative identification

Active Publication Date: 2019-11-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the discriminant analysis method uses a variety of information to make a comprehensive judgment on lithology. Only when the number and types of training samples are sufficient to cover all sample types and are representative can the accuracy of its classification be theoretically guaranteed.

Method used

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  • Metamorphic rock quantitative identification method based on diagenetic indication elements
  • Metamorphic rock quantitative identification method based on diagenetic indication elements
  • Metamorphic rock quantitative identification method based on diagenetic indication elements

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Experimental program
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Embodiment

[0049] In the SinoLog Pro software, the above inventions are realized, such as figure 2 Shown, develop the corresponding program module.

[0050] The implementation steps in SinoLog Pro software are as follows: Figure 4 shown.

[0051] 1) Load routine data in SinoLog Pro software;

[0052] 2) Implement the program modules of Part 5 in SinoLog Pro software

[0053] 3) Call and run the program modules in Part 5;

[0054] 4) Plot the processing results.

[0055] see figure 1 , the abscissa is the lithology index N, and the ordinate is the natural gamma ray. Seven lithologies of granite, alkali-elongated mixed granite, mixed granite (felsic), syenite, mixed granite (magfic), metagranulite and diorite can be identified by using the chart.

[0056] see figure 2 , compared the results of lithology naming based on diagenetic indicator elements with rock thin section analysis, the first track in the figure is natural gamma ray (GR) and borehole diameter (CALS), the second tr...

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Abstract

The invention discloses a metamorphic rock quantitative identification method based on diagenetic indication elements. The content change of the bedrock lithology indication element in different diagenetic stages is determined by adopting the lithology index N for eliminating the porosity influence, the correlation between the bedrock lithology indication element and the bedrock lithology indication element is established by extracting the logging response characteristics, and lithology quantitative identification is performed by taking the critical interval of the element content change as the basis. Natural gamma and N-value envelope area are applied to directly and qualitatively indicate lithology of the buried hill bedrock; the indication effect of the trace element selenium on the lithology of the buried hill bedrock is determined; and the natural gamma and N value envelope area are calibrated by using the selenium content, and a quantitative identification standard of bedrock lithology is established.

Description

technical field [0001] The invention belongs to the technical field of well logging evaluation for oil and natural gas exploration and development, and in particular relates to a quantitative identification method for metamorphic rocks based on diagenetic indicator elements. Background technique [0002] Metamorphic rock refers to a new type of rock that has been modified by the internal forces of the earth (temperature, pressure, stress changes, chemical composition, etc.). Under the action of the pressure and temperature inside the earth, solid rocks undergo migration and recrystallization of material components to form new mineral combinations. The chemical composition of metamorphic rocks is closely related to that of the original rocks, and is also related to the characteristics of metamorphism. During the formation of metamorphic rocks, if there is no metasomatism, except H 2 O and CO 2 In addition, the chemical composition of metamorphic rocks basically depends on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/06G01V11/00
CPCG06Q50/06G01V11/00Y02A90/30
Inventor 李晓辉令狐松何丽李剑平宋小增仇加宇蔺建华许绘宏黄亮李冰
Owner BC P INC CHINA NAT PETROLEUM CORP
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