摘要
随着全球范围日益严重的能源和环境危机,寻找环境友好型的新型清洁能源成为世界各国的研究焦点。地热能具有稳定、连续、利用系数高等优点,增强型地热系统(enhanced geothermal system,EGS)作为资源丰富的新型清洁能源正在获得世界各国的广泛关注。目前EGS的研究方法主要有:(1)建立野外试验场进行直接的工程实践研究;(2)通过数值模拟进行理论分析研究。针对野外试验场的钻井探测、水力激发、微震监测、循环测试等工程研究以及数值模型模拟研究,对国内、外EGS的研究现状进行了介绍。数值模拟部分着重分析目前几种主要的热储层模型构建,包括规则裂隙网络模型、随机裂隙网络模型、等价多孔介质模型等,并且介绍了本实验室在双能量方程模型方面的研究情况。最后分析和展望了EGS研究的发展趋势,以期为我国EGS研发工作提供参考。
The energy and environment crisis are arousing the world to search for new and clean energy resources. The geothermal energy has advantages of steady and continuous supply, high utilization coefficient, etc. As a new and clean energy development direction of rich resources, the enhanced geothermal system （ EGS ） is gaining increasing attentions across the world. There are mainly two kinds of research methods ： （ 1 ） the direct engineering practice research through field test site; （2） the theoretical analysis through numerical simulation. This paper introduced the present research situation of EGS at home and abroad, including the borehole exploring, hydraulic stimulation, seismic monitoring and circulation test during practical field tests, and various numerical simulation studies, especially for the building of several main heat reservoir models： the regular fracture network model, the stochastic fracture network model, the equivalent porous medium model, etc. And then, the research situation in dual energy equations model was introduced. Finally, this paper analyzed and forecasted the development trend of EGS research, which could provide reference for the R＆D of EGS in China.
出处
《电力建设》
2014年第4期10-24,共15页
Electric Power Construction
基金
国家高技术研究发展计划项目(863计划)(2012AA052802)
国家自然科学基金项目(51206174)
广东省自然科学基金博士启动项目(S2013040013967)
关键词
地热发电
增强型地热系统(EGS)
野外试验场
数值模拟
geothermal power generation
enhanced geothermal system （EGS）
field test site
numerical simulation
