摘要
从电磁正演模拟结果出发,引入了地震勘探中“照明度”的概念,提出了电磁勘探的照明度定义及特征函数等。对照明度的地表平面特征、随深度变化特征和随频率与大地电阻率的变化特征进行了模拟分析,总结了其规律。通过分析,对广域电磁法的观测系统提出了优化建议,对野外测量的偏移角度和范围提供了借鉴。
In this paper,the concept of "illumination" used in seismic exploration is introduced based on electromagnetic simulation. The definition of illumination and the eigen function of electromagnetic exploration are proposed. Based on the modeling results,the plane characteristics of illumination are analyzed with the variation of depth,frequency and earth resistivity analyzed. By the illumination analyzing,the optimization suggestion has been put forward for the observation system of the wide-field electromagnetic method,which provides theoretical support for the offset angle and range of the field measurement.
作者
陈思琪
何展翔
柳建新
郭荣文
郭振威
CHEN Siqi;HE Zhanxiang;LIU Jianxin;GUO Rongwen;GUO Zhenwei(Central South University,Scool of Geosciences and Info-Physics,Changsha 410083,China;Key Laboratory of Non-ferrous Resources and Geological Detection,Ministry of Hunan province,Changsha 410083,China;Bureau of Geophysical Prospecting INC.CNPC,Comprehensive chemical and geophysical office,Zhuozhou 072751,China)
出处
《物探化探计算技术》
CAS
2019年第3期371-378,共8页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金资助项目(41674080,41674079)
中南大学创新驱动项目(2016CX005,2015CX008)
中国博士后科学基金资助项目(2017M622607)
关键词
照明度
观测系统
偏移角度
广域电磁
illumination
observation system
offset angle
wide-field electromagnetic
