Continental lake basin mud shale fine particle grain sedimentation type dividing method

Abstract

The invention provides a continental lake basin mud shale fine particle grain sedimentation type dividing method, which comprises: 1, obtaining the oil content of mud shale, and grading according to the oil content result; 2, determining mud shale division parameters; 3, analyzing the mud shale division parameters, and clearly setting parameter grading and naming standards; 4, distinguishing whether the mud shale has a stratification phenomenon; 5, naming mineral structures and particle deposition types; and 6, establishing the identification of different fine particle sedimentation types. According to the present invention, the dividing method has characteristics of easy identification, simple operation, strong practicability and easy promotion, can finely divide the continental lake basin mud shale fine particle grain sedimentation types, and provides the effective assurance for the fine research on mud shale stratum and the unconventional shale oil-gas exploration by research personnel.

Description

technical field [0001] The invention relates to the technical field of continental lacustrine mud shale sedimentology, in particular to a method for classifying fine-grained sedimentary types of continental lacustrine mud shale. Background technique [0002] In the past, the main targets of oil and gas exploration and development in continental lacustrine basins were sandstone formations with good storage and seepage capabilities. In recent years, my country has made great breakthroughs in unconventional shale oil and gas exploration. Compared with the high degree of exploration of conventional sandstone formations, the degree and accuracy of research on mud shale formations and fine-grained sedimentary environments are relatively lagging behind, which is specifically reflected in the traditional The theory of oil and gas exploration regards the fine-grained sedimentary strata of mud shale as the oil source layer, and regards it as a unified whole, which is obviously not enou...

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Problems solved by technology

At this stage, the original lithological identification of mud shale cannot reflect the composition, structure and occurrence status of other components of fine-grained sediments of mud shale, and the width of the identification of fine-grained sedimentary types related to mud shale is consistent , which makes it difficult for researchers to analyze the evolution distribution of different fine-grained sediment types according to the width change of lithological markers on the lithology histogram, which in turn reduces the degree of fine-grained sedimentation of shale fine-grained deposits of geological personnel and the work efficiency of exploration deployment

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