石油物探2017，Vol.56Issue(6)：775-781,791,8.DOI:10.3969/j.issn.1000-1441.2017.06.001
基于声发射分形参数分析的储层岩石裂纹演化特征研究
Evolution characteristics of reservoir rock cracks based on acoustic emission fractal parameter analysis
摘要
Abstract
Acoustic emission signal characteristics can be used to analyze the characteristics of crack evolution during reservoir rock fracturing process.Using acoustic emission tests under uniaxial compression on different types of reservoir rocks,the change law of the acoustic emission signal with stress load variation in the whole process of rock failure was studied by analyzing the fractal b values of amplitude,rising time,and duration of the acoustic emission signal obtained using the cumulative frequency and discrete frequency methods.The test results show that,during uniaxial compression process,the stress and strain state of different types of rocks differ significantly,because they have different internal struotures,and the distribution characteristics of the fractal b value in different stress loading stages differ obviously.Moreover,the fractal b values of amplitude,rising time,and duration show obvious regularity at different stress loading stages.Both the laboratory experiment and the field microseismic test results show that the analysis of fractal b value can be used to clarify crack evolution characteristics in tight reservoir hydraulic fracturing.关键词
裂纹演化/声发射/分形/b值/Kaiser效应Key words
crack evolution/acoustic emission/fractal/b value/Kaiser effect分类
天文与地球科学引用本文复制引用
唐杰,王浩,温雷,孙成禹,关键..基于声发射分形参数分析的储层岩石裂纹演化特征研究[J].石油物探,2017,56(6):775-781,791,8.基金项目
国家自然科学基金项目(41504097,41374123)、国家科技重大专项(2016ZX05006-002)与中央高校基本科研业务费(15CX08002A)联合资助.This research is financially supported by the Natural Science Foundation of China (Grant Nos.41504097,41374123),the National Science and Technology Major Project of China (Grant No.2016ZX05006-002) and the Fundamental Research Funds for the Central Universities (Grant No.15CX08002A). （41504097,41374123）
