三维高密度电阻率法偶极装置分辨率研究  

Research on resolution of dipole array in 3D ERT

作　　者：王艳龙 杜立志[2] 蒋华中 翟松涛 马栋和[1] WANG Yanlong;DU Lizhi;JIANG Huazhong;ZHAI Songtao;MA Donghe(China Water Northeastern Investigation,Design & Research Co.,Ltd.,Changchun 130000,China;College of Construction Engineering,Jilin University,Changchun 130026,China;Sinopec Geophysical Co., Ltd. Southern Branch,Deyang 618000,China;Geopen(Beijing)Technology Co., Ltd.,Beijing 101000,China)

机构地区：[1]中水东北勘测设计研究有限责任公司,长春130000 [2]吉林大学建设工程学院,长春130026 [3]中石化地球物理有限公司南方分公司,德阳618000 [4]骄鹏科技(北京)有限公司,北京101000

出　　处：《物探化探计算技术》2021年第1期49-61,共13页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：为分析二极和偶极装置的分辨率,首先建立数值模型,并定义了均匀度、数据密度、层间分辨率、盲区的计算方式,从数据结构的角度定量讨论三维高密度电阻率法中偶极、二极装置的分辨能力。通过不同埋深、不同规模的高、低阻异常体的正演计算,对获取的数据反演后分析结果与初始模型的契合程度,定量分析两种装置对异常体的分辨能力,结果显示,在浅部异常勘探中偶极装置比二极装置整体分辨率高、细节信息丰富,尤其是异常体为低阻特征时更为明显。为了验证偶极法的有效性,选取吉林大学朝阳校区内某处地下管道为探测场地,利用E60DN高密度电法工作站进行三维高密度电法数据采集,经反演计算,精细的探测出地下管道的空间展布规律,效果较好。In order to analyze the resolution of dipole and dipole device,a numerical model is firstly established in this paper.And then the calculation methods of uniformity,data density,interlayer resolution and blind area are defined.The resolution ability of dipole and dipole device in 3-D high-density resistivity method is quantitatively discussed from the perspective of data structure.Through the analysis of different buried depth and the size of the high and low resistance of abnormal body forward calculation to obtain the data inversion analysis results and the fit of the initial model,quantitative analysis of the two kinds of device's ability are used to distinguish abnormal body according to the results for the exploration of shallow anomaly dipole device with overall high resolution,rich details.The especially the abnormal body is more evident when low resistance characteristics.In order to verify the effectiveness of the dipole method,an artificial air-raid shelter in chaoyang campus of Jilin University is selected as the detection site.The E60DN high-density electrical method workstation is used to collect 3D high-density electrical method data.The spatial distribution law of underground cavern by inversion calculation is detected with fine precision and good effect.

关 键 词：三维高密度电阻率法 偶极装置 地下管道探测 分辨率 

分 类 号：P631.2[天文地球—地质矿产勘探]