On the development status and future direction of enhanced geother-mal system experimental simulation equipment
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 high-temperature 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.
dry hot rockenhanced geothermal systemsimulation devicehydraulic fracturingtrue triaxial
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