基于文献计量学的2000-2022年地热数值模拟技术进展与趋势

Geothermal numerical simulation technology by bibliometrics:advances and trends

基于2000−2022年分别发表在Web of Science核心数据库和中国知网数据库的899和686篇地热数值模拟研究领域的相关文献,利用CiteSpace和VOSviewer软件进行文献计量分析,探究地热数值模拟研究发展趋势、重点研究领域与热点问题.结果显示:地热数值模拟领域发文量呈指数增长,且2014年之后进入快速发展期,其中中国发文量占比最高;关键词共现和聚类时间线图谱显示重点研究方向为增强型地热系统、地源热泵、换热性能、多场耦合等.在此基础上对多场耦合过程进行总结,水-热耦合的研究起始最早且研究最多,是多场耦合的核心,可从储层物理性质和开采方式2方面出发考虑参数.三场耦合主要为水-热-力学耦合和水-热-化学耦合,在二场耦合的基础上分别加入了力学变形和地球化学反应沉淀溶解过程.其中:水-热-力学耦合是目前的研究热点;水-热-力学-化学耦合研究较少,其研究需要考虑采热过程的时间尺度效应.对主流表征裂隙的方法进行了优势和局限性的总结,离散裂隙网络模型是目前要攻坚的研究重点和热点.研究表明数值模拟方法在地热领域研究中正处于快速发展时期,是目前及未来产学研应用的重要手段.

Numerical simulation is an important method to meet the needs of large time-scale research in geothermal systems,bibliometric analysis of relevant literature can provide some reference for understanding current research progress and trends.A total of 899 and 686 papers in the field of geothermal numerical simulation retrieved from Web of Science core and CNKI from 2000-2022 respectively are subject to CiteSpace and VOSviewer bibliometric analysis.The number of publications in geothermal numerical simulation was found to have increased exponentially,entering a period of rapid development after 2014,with papers from China accounting for the largest percentage.The keyword co-occurrence and clustering timeline maps show that the key research directions are:enhanced geothermal systems,ground source heat pumps,heat transfer performance,and multi-field coupling.Hydraulic-thermal coupling is the earliest and most researched issue,as the core of multi-field coupling.Hydraulicthermal-mechanical is the current research hotspot,mainly hydraulic-thermal-mechanical coupling and hydraulicthermal-chemical coupling.Mechanical deformation and geochemical reaction sedimentation and dissolution process are added on the basis of two-field coupling.Hydraulic-thermal-mechanical-chemical coupling with less attention needs to consider the time scale effect of heat extraction process.Discrete fracture network model is the research focus and hotspot at present.Numerical simulation method is in a period of rapid development,and is an important means for industry-university-research applications.