增强型地热系统实验模拟装置研发进展

On the development status and future direction of enhanced geother-mal system experimental simulation equipment

梳理了国内外增强型地热系统(EGS)模拟实验装置研发进展,归纳了以高温高压反应釜、岩心夹持类渗流模拟系统、岩石三轴电液伺服控制系统和大尺寸真三轴实验系统为代表的4类模拟装置的功能特点,分析了不同实验模拟装置适用范围及其对于EGS建设关键技术研究的支撑作用。结合国内外在干热岩资源开发利用工程建设中存在的问题,分析了EGS模拟实验装置的研发方向,在现有装置平台的基础上提出了建设大型模块化干热岩开发模拟实验平台的设计思路,论述了平台装置的系统构成和模块化功能特点,探讨了热储区形成机理和复杂地质条件下多场耦合作用机制。

The research and development progress of enhanced geothermal system(EGS)simulation experimental devices at home and abroad is reviewed in this paper.The functional characteristics of four types of simulation devices,including hightemperature and high-pressure reaction vessels,rock core clamping seepage simulation systems,rock triaxial electro-hydraulic servo control systems,and large-scale true triaxial experimental systems are sum-marized.Then,the applicability of different experimental simulation devices and their supporting roles in key technologies research for EGS construction are compared and analyzed.Based on the problems existing both domestically and internationally in the development and utilization of dry hot rock resources,the research and development direction of EGS simulation experimental equipment are elaborated.A design idea of building a large-scale modular dry hot rock development simulation experimental platform is proposed on the basis of ex-isting equipment platform.The system composition and modular functional characteristics of the new platform device are explained for the study of formation mechanism of thermal storage areas and the coupling mechanism under complex geological conditions,which provides important data support for the engineering practice of dry hot rock development and utilization.