【作者】 完颜祺琪； 伍锦鹏； 王芝银； 郑雅丽；

【Author】 Wanyan Qiqi~(1,3),Wu Jinpeng~2,WANG Zhiyin~2,Zheng Yali~3 1.Southwest Petroleum University,Chengdu 610507 China 2.Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum,Beijing 102249 China 3.Langfang Branch of Research Institute of Petroleum Exploration and Development,Langfang 065007 China

【机构】 西南石油大学； 中国石油勘探开发研究院廊坊分院； 中国石油大学(北京)城市油气输配技术北京市重点实验室；

【摘要】 对湖北云应、江苏淮安和河南平顶山盐矿层状盐岩进行了不同围压、不同偏应力条件下的三轴压缩蠕变试验,研究了不同地区盐岩的蠕变特性,获得了不同盐岩稳态蠕变阶段的蠕变速率。研究表明,围压和偏应力是稳态蠕变速率的主要影响因素;相同试验条件下,纯盐岩的蠕变速率和蠕变量要大于泥岩,进入稳态蠕变阶段的时间也相对较长;含泥岩夹层盐岩的破坏机理与泥岩夹层的强度和附加力的分配有关。根据幂指数本构模型,拟合得出了不同矿区各种岩性的稳态蠕变参数。更多还原

【Abstract】 The creep experiments under different confining pressures and deviatonic stresses are carried out on rock salt with interlayers in the salt mines which located in Yunying of Hubei province,Huai’ an of Jiangsu province and Pingdingshan of Henan province,the creep behaviors of different kinds rock salt are studied,and the steady creep rate are also obtained.The study indicates that the confining pressures and deviatonic stresses are the main factors for the steady creep rate;Under the same experimental conditions,the pure rock salt’ s creep rate and creep are greater than the mudstones’,the pure rock salt also take a relative long time to enter the stage of steady creep;The failure mechanism of rock salt with mudstone interlayers is related to the strength of mudstone interlayers and the allocation of additional force.Accor-ding to the exponent constitutive model,the steady creep parameters of different kinds rock salt in different salt mines are obtained.更多还原