增强型地热系统水力压裂与声发射监测室内实验研究  

Laboratory Study on Hydraulic Fracturing and Acoustic Emission Monitoring of Enhanced Geothermal System

作　　者：李庭樑 曹文炅[1,2,3] 王亦伟 郭剑[1,2,3] 蒋方明 LI Ting-liang;CAO Wen-jiong;WANG Yi-wei;GUO Jian;JIANG Fang-ming(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院可再生能源重点实验室,广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640 [4]中国科学院大学,北京100049

出　　处：《新能源进展》2019年第3期241-248,共8页Advances in New and Renewable Energy

基　　金：中国科学院A类战略性先导科技专项项目(XDA21060700);国家自然科学基金项目(41702256);广东省自然科学基金项目(2017A030310328);广东省自然科学基金重大基础培育项目(2014A030308001);NSFC-广东省联合基金项目(U1401232);广东省新能源和可再生能源研究开収与应用重点实验室基金项目(Y709JF1001)

摘　　要：增强型地热系统(enhanced geothermal system,EGS)以干热岩热能的开采和利用为目的,正逐渐成为世界各国的重点研究对象。除了建立EGS野外试验场开展实际场地研究和技术示范外,亦有必要开展相关的室内实验研究,研究或验证相关关键技术,为野外场地建设提供理论基础和技术支持。本课题组自主研发了模拟地下真实环境的实验系统,开展了尺寸为400 mm×400 mm×400 mm的花岗岩水力压裂实验,通过声发射事件监测到的声发射数据,分析了裂缝的扩展规律,并进行了初步的水力连通实验,探讨了各采出井的流量分配,研究了从注入井到生产井的水力连通特性。结果可为数值模拟提供基础数据,为野外试验场地的建设提供参考。Aiming at extraction and utilization of hot dry rock thermal energy,enhanced geothermal system(EGS)is now a research focus across the world.Besides constructing field test site to carry out experimental studies and technical demonstration,it is also necessary to carry out lab tests to study or verify relevant key technologies.Laboratory tests can provide theoretical basis and technical support for the construction of field sites.Herein,a self-developed indoor experimental EGS was built to experimental system,which can simulate the underground pressure and temperature environment.With this experimental setup,the hydraulic fracturing experiment of a 400 mm×400 mm×400 mm granite block was carried out.Based on the monitored acoustic emission data,fracture growth and propagation in the rock block and perform preliminary hydraulic connection test were analyze.Flow distribution in the four surrounding production wells was evaluated,and the hydraulic connectivity from injection well to each production well was explored.The results obtained can provide basic data for numerical simulation and may have some reference value for the construction of real field test sites.

关 键 词：增强型地热系统 干热岩 水力压裂 模拟实验 声发射 裂缝扩展 

分 类 号：TK521[动力工程及工程热物理—热能工程]