Shale gas multi-factor area selection and evaluation method based on fuzzy matrix

Abstract

The invention discloses a shale gas multi-factor area selection and evaluation method based on fuzzy matrix. The method comprises the following steps: step one, studying the geometric features, formation mechanism, and basin properties of basin controlling fracture, and establishing a static geologic model; step two, studying the kinematics features of basin controlling fracture, and analyzing thehistory of structural evolution, burial history of shale, and hydrocarbon generation history of shale; step three, extracting shale static / kinetic evaluation features, defining various parameters ofthe shale gas area selection and evaluation, and assigning the parameters; step four, establishing a fuzzy matrix, and carrying out multi-factor evaluation; and step five, determining the prospectivearea and favorable area based on the results of shale gas area selection and evaluation. The multi-factor area selection and evaluation method has the advantages that various static / kinetic parametersduring the shale gas formation and enrichment process are integrated, a mathematic method based on a fuzzy matrix is used to carry out area selection and evaluation, the artificial interference is reduced maximally, and the method has an important meaning for the shale gas area selection and exploration.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploration, and in particular relates to a multi-factor selection evaluation method for shale gas based on a fuzzy matrix, which is suitable for shale gas prospect areas and favorable areas. Background technique [0002] my country has a vast territory, complex geological structure conditions, and many types and quantities of oil and gas-bearing basins. The complex multi-stage tectonic movement determines that there are many types of organic-rich shale deposits, the geological conditions for the formation of shale gas are complex, and the main controlling factors for enrichment vary widely. [0003] my country's shale gas exploration started late. Although since 2012, as my country has made breakthroughs in shale gas exploration and development in Jiaoshiba and other southern regions, the data has been greatly enriched. There are many phases, multiple hydrocarbon generation phases of mud shale,...

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Problems solved by technology

[0004] In view of the characteristics of many types of shale in my country, many periods of tectonic activity, many periods of hydrocarbon generation in mud shale, serious damage to shale gas in the later period, and high requirements for preservation conditions, the present invention proposes a fuzzy matrix-based shale gas multiple The factor selection evaluation method solves the technical problem of selection evaluation of shale gas prospect areas and favorable areas, and fills the gap in this research at home and abroad

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