分布式光纤温度示踪识别裂隙地下水流动研究进展  

Advances of DTS-based heat tracer tests in characterization of groundwater flow in fractured media

作　　者：符韵梅 董艳辉[1,2,3] 徐志方 王礼恒[1,2] 段瑞琪 赵少桦[1,2,3] FU Yunmei;DONG Yanhui;XU Zhifang;WANG Liheng;DUAN Ruiqi;ZHAO Shaohua(Key laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Institutions of Earth Science,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Cenozoic Geology and Environment,Chinese Academy of Science,Beijing 100029,China)

机构地区：[1]中国科学院地质与地球物理研究所页岩气与地质工程重点实验室,北京100029 [2]中国科学院地球科学研究院,北京100029 [3]中国科学院大学地球与行星科学学院,北京100049 [4]中国科学院地质与地球物理研究所新生代地质与环境重点实验室,北京100029

出　　处：《水利水电科技进展》2020年第3期86-94,共9页Advances in Science and Technology of Water Resources

基　　金：国家科技重大专项(2017ZX05008-003-021);国家自然科学基金(41702273);中国科学院地质与地球物理研究所页岩气与地质工程重点实验室开放基金(KLSG201704)。

摘　　要：识别地下水渗流通道和流动状态,是预测裂隙介质中地下水流动行为的基本前提,也是目前裂隙地下水研究的热点问题之一。由于具备较强时空连续性、高分辨率、监测便捷、成本低廉等优点,基于分布式光纤测温(DTS)的温度示踪正逐渐成为裂隙地下水流动特征识别的重要手段,在识别地下水流动状态、钻孔间连通裂隙分布甚至裂隙水力性质等方面取得了许多新的进展。在阐述DTS原理的基础上,综述了基于DTS的温度示踪试验方法及其在裂隙地下水特征识别研究中的应用进展,重点归纳了该方法的各种试验手段、应用方式与适用范围,并指出了钻孔中的垂向流动是研究人员应用温度示踪试验时需重点关注的因素。将基于DTS温度示踪的多种试验手段结合运用及其与其他示踪方法协同运用,是未来需要进一步研究的重点方向。基于DTS的温度示踪方法有助于提升对裂隙介质中地下水渗流及热运移机理的认识,在涉及裂隙地下水的深部地质工程如高放核废物地质处置选址评价、增强型地热资源开发等研究中具有广阔的应用前景。Characterizing groundwater flow patterns and preferential pathways is basic premise and hot issue for prediction of groundwater flow behavior in fractured media.With the advantage of strong space-time continuity,high spatial and temporal resolution,simple measurements as well as low cost,Distributed Temperature Sensors(DTS)has been applied in heat tracer tests to study groundwater flow and heat transport in fractured media recently.DTS based heat tracer tests have gradually become an important method to identify hydraulically active fractures and to estimate their hydraulic properties,and have provided new insights in characterizing groundwater flow in fractured media.The principles of DTS,the methods of heat tracer tests based on DTS and their applications in the characterization of groundwater flow in fractured media were introduced and summarized.Various experimental methods,application modes and range of application involving DTS were reviewed.Special attention should be paid to the vertical flow in boreholes,which is a key factor for researchers to focus in the application of DTS.Integration of various DTS based heat test methods and the combination with other tracer methods can be regarded as the research interests in the future.In addition,DTS-based heat tracer test has great potential in understanding of groundwater flow and heat transport process in fractured media,making it a promising application prospect in deep geological engineering activities including high-level radioactive waste geological disposal,exploitation of hot fractured rocks.

关 键 词：分布式光纤测温 温度示踪 裂隙介质 地下水流动特征 

分 类 号：P641.6[天文地球—地质矿产勘探]