土酸注入速率对EGS热储层改造效果影响的实验研究  

Experimental research on the impact of mud acid injection rate on reconstruction of EGS geothermal reservoir

作　　者：吴永东[1] 鲍新华[1] 赵立新[1] 詹远[1] 马智法[1] 

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,吉林长春130021

出　　处：《可再生能源》2015年第11期1674-1678,共5页Renewable Energy Resources

基　　金：国家高新技术发展"863"计划项目(2012AA052801);吉林大学研究生创新基金资助项目(2015083;2015107)

摘　　要：增强型地热系统(Enhanced Geothermal System,EGS)是一种通过人工形成地热储层的方法从低渗透性岩体中经济地开采相当规模深层热能的工程,对渗透率的改造体现了EGS热储层改造效果。文章进行了实验室条件下的岩心流动实验,选用4组不同土酸注入速率进行对比,根据注酸前后岩心裂隙渗透率的变化,分析研究土酸的注入速率对岩心裂隙渗透率的影响。研究结果表明,采用"高流量"的注入方式更有利于凝灰岩裂隙通道的改造。Enhanced geothermal system （EGS） is an engineered geothermal？system that has been created to extract economical amounts of heat from deep geothermal reservoir of low permeability. The reconstruction of EGS geothermal reservoir can be reflect on permeability. In this paper, there have a core flow experiment under laboratory conditions, four mud acid injection rates are used to compare, then according to the change of permeability before and after reaction, research the impact of different mud acid injection rate on the core fracture permeability. The results show that high flow rate is more helpful at reconstruction of fracture channel in tuff.

关 键 词：增强型地热系统 土酸 凝灰岩 岩心流动实验 化学刺激 裂隙渗透率 

分 类 号：TK529[动力工程及工程热物理—热能工程]