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Carbonatite lithology identification method

A carbonate rock and lithology identification technology, which is applied in earthwork drilling, wellbore/well components, material excitation analysis, etc., can solve the problem of inability to realize quantitative and rapid identification of carbonate rock lithology, and no data judgment is given Standards and other issues to overcome human interference factors, accurate lithology identification results, and easy operation

Active Publication Date: 2017-05-24
CHINA PETROCHEMICAL CORP +4
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Problems solved by technology

However, this method does not provide specific data judgment standards, and cannot realize quantitative and rapid identification of carbonate rock lithology

Method used

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  • Carbonatite lithology identification method

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Embodiment

[0047] In this embodiment, the above-mentioned identification method is used to identify and judge the lithology of carbonate rocks at the construction site, specifically: use the ZY-LLA laser lithology automatic identification instrument to identify 1# and 2# rocks that have been confirmed as carbonate rocks at the site , 3#, 4#, 5#, 6#, 7#, 8# rock core samples carry out element spectrum analysis, obtain the spectral intensity I of Ca element characteristic wavelength 317.933nm 317.933 , and the spectral intensity I of Mg element characteristic wavelength 279.077nm 279.077 ; The detected I 317.933 Into formula (1), the calculated Ca element content C Ca , will I 279.077 Into formula (2), the calculated Mg element content C Mg ; Calculate Ca, Mg element content ratio R=C Ca / C Mg , according to the size of the R value to judge the core lithology.

[0048] The detection and calculation data of this embodiment and the judgment results of rock core lithology are shown in T...

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Abstract

The invention discloses a carbonatite lithology identification method, and belongs to the technical field of petroleum and gas exploration and development. The carbonatite lithology identification method includes the steps that the Ca element content and Mg element content in a rock debris sample are detected, and the ratio of Ca element content to the Mg element content is calculated according to the formula R=Ca / Mg; when R is larger than 59.4, carbonatite is pure limestone; when R is larger than 10.8 and smaller than or equal to 59.4, the carbonatite is limestone containing dolomite; when R is larger than 4.7 and smaller than or equal to 10.8, the carbonatite is dolomite limestone; when R is larger than 2.6 and smaller than or equal to 4.7, the carbonatite is calcite dolomite; when R is larger than 1.8 and smaller than or equal to 2.6, the carbonatite is dolomite containing calcite; when R is larger than or equal to 1.8, the carbonatite is pure dolomite. The carbonatite lithology identification method is easy to operate, accurate in lithology identification result, capable of correctly guiding deploy of a petroleum and gas horizontal well of a carbonatite reservoir and increasing economic benefits of petroleum and gas exploitation of the carbonatite reservoir.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to the technical field of mud logging in the process of petroleum and natural gas exploration and development, and in particular to a carbonate rock lithology identification method. Background technique [0002] In the process of oil and gas exploration and development, it is necessary to carry out mud logging detection on the structural properties of oil and gas underground reservoirs, and make a preliminary judgment on the exploration value and exploration methods of oil and gas, so as to improve the accuracy and economic benefits of exploration. The identification and judgment of the physical structure of the layer has important guiding significance for the exploitation of oil and gas. Carbonate reservoir is one of the main reservoirs of oil and natural gas. It is mainly composed of calcite and dolomite. According to the content of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00G01N21/63
CPCE21B49/00G01N21/63
Inventor 佘明军李油建陶国强李胜利严国平黄继翔王新玲夏相成
Owner CHINA PETROCHEMICAL CORP
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