增强型地热系统(EGS),又称干热岩,是一种从低渗透率和低孔隙度的岩层(干热岩)中提取热量从而获取大量热能的一种工程。有关增强型地热系统的研究与开发已有30余年的历史,但以往只局限于美国、英国、法国、德国、瑞士、日本、澳大利亚等国家。中国高温岩体地热开发研究起步较晚,仅少数科研单位在这方面做了理论探讨和国际合作。本文主要讨论了增强型地热系统的基本理念、国内外研究现状与发展趋势、关键技术、存在的问题以及展望。

Enhanced Geothermal System (EGS), known as Hot Dry Rock (HDR), is an engineering technology where the heat energy is extracted from low permeability and low porosity rock, namely, HDR in order to gain the quantity of energy. Although the history and development of EGS has been more than 30 years, only a small number of countries in the world have a voice in this respect, such as the United States, Britain, France, Germany, Switzerland, Japan, Australia, etc. The basic concept, research and development status, key technologies, issues and expectation involving the EGS are mainly discussed.