不同应力状态下多杂质盐岩分数阶蠕变模型参数演化规律研究  

Study on the Evolution of Parameters of Fractional Creep Model of Multi-impurity Salt Rock under Different Stress States

作　　者：易海洋 路乐乐 武志德[3] 张倩 姬振兴 孙如意 YI Hai-yang;LU Le-le;WU Zhi-de;ZHANG Qian;JI Zhen-xing;SUN Ru-yi(North China Institute of Science and Technology,Langfang 065201,China;China University of Mining and Technology,Beijing 100083,China;Research Institute of Petroleum Exploration and Development-Langfang,Langfang 065007,China)

机构地区：[1]华北科技学院,河北廊坊065201 [2]中国矿业大学(北京),北京100083 [3]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《盐科学与化工》2020年第7期27-31,34,共6页Journal of Salt Science and Chemical Industry

基　　金：中央高校基本科研业务费项目(3142019019);河北省高等学校科学技术研究项目(QN2019320);廊坊市科技支撑计划项目(2019013091)资助;国家重点研发计划“国家石油及天然气储备库安全保障技术与装备研发”(2017YFC0805800)。

摘　　要：分数阶蠕变模型在描述非均质材料蠕变损伤特征方面具有良好的适用性,但当前分数阶蠕变模型的研究主要基于单一应力状态下的蠕变数据拟合。文章通过开展多杂质盐岩在不同围压下不同应力分级加载三轴蠕变试验,基于分数阶蠕变模型,通过对试验数据拟合辨识分数阶蠕变模型参数,分析参数随加载应力的演化规律,提出盐岩分数阶蠕变模型参数的演化模型,拓展了分数阶蠕变模型的应用范围,为盐岩分数阶蠕变模型在盐穴储气库的实际工程应用提供基础。Fractional creep model has good applicability in describing the creep damage characteristics of heterogeneous materials,but current research on fractional creep model is mainly based on the creep data fitting under a single stress state. By conducting more formation of impurities in different stress under different confining pressure loading triaxial creep test,creep model based on fractional order,based on experimental data fitting recognize fractional creep model parameters,analyzes the parameters along with the evolution law of load stress,put forward the formation creep model parameters of fractional order,to expand the application range of fractional order creep model. It provides the foundation for the application of fractional creep model of salt rock in salt cavern gas reservoir.

关 键 词：多杂质盐岩 分数阶蠕变模型 参数演化 粘性系数 

分 类 号：TU451[建筑科学—岩土工程]