地热储多场多相数值模拟与介尺度技术进展

Advance Research on Multi-Field and Multi-Phase Simulation of Geothermal Reservoir

热储工程系统具有很强的多样性和复杂性,随着当前地热开发利用需求的提高,裂隙介质热-流-力多场耦合复杂物理过程的高效模拟变得日益重要,它也是热储工程面临的关键技术问题。经典的多孔介质中的流动、传热和力学模拟技术已经得到了很大的发展,但其内部的多相、多物质流动和传递过程的理论仍然不成熟,裂隙介质由于本身的多尺度特性,对其热-流-力多场耦合问题的研究更为复杂,新的研究方法体系亟须建立。鉴于此,本文综述了裂隙介质热-流-力多场耦合既有的研究现状,并指明了未来面向热储工程应用的新一代裂隙介质热-流-力耦合模拟技术发展趋势及关键问题。

Geothermal reservoir characterizes as a strong diversity and complexity,with the increasing demand for geothermal energy development and utilization,multi-field coupling numerical simulation has become increasingly important,which is also a key issue for the geothermal reservoir engineering technology.Therml-hydraulic-mechanical coupling simulations in classic porous media have been greatly developed,but the theory of multiphase and multi-material flow and heat transfer is still immature.Due to the multi-scale characteristics of fractured porous media,related thermlhydraulic-mechanical coupling process is relatively more complicated,and a new research system is urgently needed to be established.In view of this condition,this paper summarizes the existing research status to indicate the future development trend of therml-hydraulic-mechanical coupling simulation and several key issues for the new generation of fractured porous media for geothermal reservoir applications.