煤田地质与勘探2017，Vol.45Issue(5)：140-146,7.DOI:10.3969/j.issn.1001-1986.2017.05.024
对瞬变电磁测深几个问题的思考(四)——从不同角度看瞬变电磁场法的探测深度
Detecting depth of transient electromagnetic method from different points of view
摘要
Abstract
In this paper,the detection depth of transient electromagnetic(TEM) field method is described in several aspects.The "smoke ring effect" of the equivalent electric current ring downward extension depth was cited.The diffusion depth of the maximum plane wave field was derived.And through the analysis of the time-frequency(T-F) the relation and distinction between the penetration depth of time domain and frequency domain was explained.Ground actual detection time needed for the same depth of information is at least twice as much as one-way diffusion depth,namely double travel time.According to several aspects of electromagnetic induction,reflection of electromagnetic waves,the frequency sounding curve of false phenomenon of extreme value and quasi seismic converted wave slowness,etc.,this conclusion is discussed.关键词
瞬变电磁场/等效电流环/扩散深度/电磁感应/电磁波反射/双程时Key words
TEM field/equivalent current ring/diffusion depth/electromagnetic induction/electromagnetic wave reflection/double travel time分类
天文与地球科学引用本文复制引用
陈明生,石显新..对瞬变电磁测深几个问题的思考(四)——从不同角度看瞬变电磁场法的探测深度[J].煤田地质与勘探,2017,45(5):140-146,7.基金项目
国家自然科学基金项目(41374150)National Natural Science Foundation of China(41374150) （41374150）
