压裂岩体微裂缝损伤演化的混沌特性研究  

Study on Chaotic Characteristics of Micro-crack Damage Evolution under Hydraulic Fracturing on Rock Mass

作　　者：艾池[1] 李正军[1] 赵万春[1] 

机构地区：[1]东北石油大学石油工程学院,大庆163318

出　　处：《科学技术与工程》2011年第9期2094-2096,2100,共4页Science Technology and Engineering

基　　金：黑龙江省青年科学基金项目(QC2010096);国家自然科学基金项目(50974028)资助

摘　　要：采用现代非线性科学的分岔和混沌理论对岩体水力压裂过程微裂缝演化特性进行了研究。定义了反应岩体细观结构与微裂缝混沌演化的张量型损伤变量。构造了适用于含天然裂缝岩体微裂缝局部化分岔混沌演化的Logistic标准模型。计算了微裂缝混沌演化分岔角度、分岔数目与不同裂缝形态的分岔开度。选取某油田的实际研究区块,理论计算与有限元软件模拟结果表明:理论计算准确,可靠性强。Characteristics of micro-crack evolution under hydraulic fracturing on rock mass were studied on using chaotic theory and bifurcation of modern nonlinear science,the tensor damage variable which described the chaotic evolution of micro-cracks and microstructure of rock were defined;the Logistic model of localization bifurcation of intrinsic rock was built;bifurcation point of chaotic evolution of micro-crack,bifurcation the number of crack patterns and different degree of sub-branch off were calculated.Practical research block was select,results of theoretical calculation and finite element software simulation showed： theoretical calculation is accuracy and credible.

关 键 词：损伤演化 混沌理论 分岔理论 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]