A method for grading prevention and control of the risk of activation of secondary fracturing faults in laminated shale reservoirs

CN122089098AActive Publication Date: 2026-05-26HUNAN UNIV OF SCI & TECH

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: HUNAN UNIV OF SCI & TECH
Filing Date: 2026-04-27
Publication Date: 2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, the identification and assessment of fault activation risks in secondary fracturing of layered shale reservoirs are inaccurate, making it impossible to formulate targeted prevention and control measures, which affects the safety and effectiveness of fracturing operations.

Method used

A multi-factor coupled FDEM hydraulic fracturing numerical model was constructed, embedding fault parameters and wellbore parameters. A coupled FDEM numerical model of fracturing-fault-wellbore was built to simulate the interaction between fluid seepage and rock deformation during hydraulic fracturing, identify the main controlling factors of fault activation, and construct a multi-dimensional quantitative risk classification evaluation model.

Benefits of technology

This improved the accuracy of fault activation risk level calculation, enabled the development of differentiated prevention and control measures, ensured the safety of fracturing operations, and improved reservoir development efficiency.

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Abstract

This application belongs to the cross - technical field of electrical digital data processing and rock mechanics, and discloses a method for hierarchical prevention and control of secondary fracturing fault activation risks in bedding shale reservoirs. This application collects multi - source basic data of bedding shale reservoirs and performs standardized pre - processing, constructs a fluid - solid coupling FDEM numerical model of hydraulic fracturing considering multi - factor coupling, embeds fault and wellbore parameters to construct a fracturing - fault - wellbore coupling FDEM numerical model and verifies it, executes numerical simulations under multiple working conditions to obtain relevant data, identifies the main controlling factors of fault activation and constructs a multi - dimensional quantitative risk grading evaluation model, inputs the data of the target well site to calculate the risk level, and matches the preset strategy to generate an optimized fracturing parameter and construction control plan. This application can effectively improve the accuracy and pertinence of fault activation risk prevention and control, and ensure the safety and effect of fracturing construction.

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