Petrofacies logging identification method for lacustrine argillaceous shale based on cause analysis
An identification method, mud shale technology, applied in the field of geological exploration of oil and gas fields, can solve problems such as difficult to obtain ideal results, and achieve the effect of easy operation of the method
Active Publication Date: 2018-05-25
CHINA PETROLEUM & CHEM CORP +1
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[0003] The identification of lithology or lithofacies logging in conventional reservoirs is relatively simple, while shale lithofacies is often a combination of dense thin interbeds composed of different lithologies or minerals. layer, it is difficult to obtain the desired effect
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[0052] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.
[0053] Such as figure 1 as shown, figure 1 It is a flow chart of the lacustrine mud shale lithofacies logging identification method based on genetic analysis of the present invention.
[0054] Step 101, starting from the actual geological data of the research object, find out the basic characteristics such as the type of the lake basin and the salinity of the lake water, and determine the main lithofacies types of the mud shale in the lake basin through core observation and thin section analysis data.
[0055] According to the core observation and statistics of continental lacustrine basins, lacustrine mud shale can be divided into three types of lithofacies according to the development degree of bedding structure, carbonate minerals and organic matte...
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The invention provides a petrofacies logging identification method for lacustrine argillaceous shale based on cause analysis. The method comprises the steps that 1) the petrofacies type of argillaceous shale is analyzed from practical geological data of a research object; 2) influence of minerals of different cause types on a logging curve is analyzed from the aspects of main mineral causes, occurrence analysis and the logging curve form of a typical well; 3) a logging identification mode plate adapted to the research object is established by referring to a petrofacies logging identification mode; and 4) logging curve data of a petrofacies well which needs identification is compared with the identification mode in segment, and the petrofacies is identified gradually. The petrofacies logging identification method for lacustrine argillaceous shale based on cause analysis is simple in operation, can be widely applied in oil field exploration research, and provides new research ideals andtechnical means for exploration of shale oil gas of continental-facies basins.
Description
technical field [0001] The invention relates to the field of oil and gas field geological exploration, in particular to a lacustrine mud shale lithofacies logging identification method based on genetic analysis. Background technique [0002] The success of marine shale oil and gas exploration in North America has drawn attention to the study of continental lacustrine mud shale. Unlike marine mud shale, the main brittle minerals in lacustrine mud shale are carbonate rocks rather than quartz, and lacustrine mud shale The lithofacies of shale vary greatly, and the identification of lithofacies is an important basic work in the research of continental shale oil and gas exploration. [0003] The identification of lithology or lithofacies logging in conventional reservoirs is relatively simple, while shale lithofacies is often a combination of dense thin interbeds composed of different lithologies or minerals. layer, it is difficult to obtain the desired effect. For this reason,...
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CPCG01V11/00
Inventor 孙锡年邱贻博贾光华刘志勇马国权任晓艳肖丽李继岩
Owner CHINA PETROLEUM & CHEM CORP