Shale classification method and application thereof and shale lithofacies distribution construction system

Abstract

The invention discloses a shale classification method and application thereof and a shale lithofacies distribution construction system, and the classification method comprises the steps: dividing to-be-classified shale according to the particle size distribution of particles, and carrying out construction to form a first stratum; on the basis of the constructed and formed first layer, obtaining the contents of siliceous minerals, calcareous minerals and clay minerals in the shale in a targeted mode, forming a second stratum through corresponding division, and constructing a unique non-intersection system of shale classification through division of the first stratum and the second stratum, wherein the siliceous minerals contain no detritus quartz. By means of the design, the technical problems that in the prior art, no matter whether shale classification is conducted purely according to particle sizes or based on three-end-member component classification, classification intersection oroverlapping relations may occur, the reliability of classification results is not enough, and the influence on environment analysis is large are solved.

Description

technical field [0001] The invention relates to the technical field of shale classification, in particular to a shale classification method and its application and a shale lithofacies distribution construction system. Background technique [0002] The petrographic characteristics of shale are the most direct evidence to record the depositional environment and changes, and are of great significance to the analysis of the enrichment mechanism of organic matter in shale. At present, there is no unified method for shale lithofacies classification in the world. [0003] At present, there are mainly three views on the classification of shale. The traditional view is that mudstone is classified according to bedding, bedding and other sedimentary structures. Facies classification and naming; the second point of view is to classify directly according to the size and relative content of particles in rocks. For example, Lazar et al. use particle sizes of 8 μm, 32 μm, 62.5 μm and 2000 ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a shale classification method and its application and a shale lithofacies distribution construction system to solve the problem of shale classification in the prior art whether it is purely based on particle size classification or based on three-terminal component classification. There may be crossing or overlapping of classifications, resulting in insufficient reliability of classification results and technical problems that have a greater impact on the analysis of the environment

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