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增强型地热系统是指从地下3～10 km低渗透岩体中经济开采深层地热的人工热能系统,主要用于发电。目前地热技术是再生能源领域的重要发展方向,而对其进一步研究受到发达国家的高度重视,但我国在该领域研究还基本处于空白。法国的苏尔士地热田是欧洲目前仍在运行的增强型地热系统(EGS)现场试验场,在20多年的实践过程中产生了大量的科研成果。本研究通过回顾该地热田在开发阶段取得的成果,得到其地质勘探、人造储层、循环测试等方面的主要结论,以便为国内EGS科学研究及项目实施提供参考。
The enhanced geothermal system refers to the artificial thermal energy system for economically exploiting deep geothermal energy in the low-permeability rock mass from 3 to 10 km underground, mainly for power generation. At present, geothermal technology is an important development direction in the field of renewable energy, and further research on it is highly valued by developed countries. However, the research in this field in our country is still basically blank. The Sohland geothermal field in France is an EGS field test site currently operating in Europe and has produced numerous scientific achievements during more than 20 years of practice. By reviewing the achievements of this geothermal field in the development stage, this study obtained the main conclusions of geothermal prospecting, man-made reservoirs and circulation testing in order to provide reference for the domestic EGS scientific research and project implementation.