| 电偶源瞬变电磁测深研究(三)--大地表面瞬变电磁场 |
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| 引用本文： | 陈明生,解海军.电偶源瞬变电磁测深研究(三)--大地表面瞬变电磁场[J].煤田地质与勘探,1999,27(3):58-61. |
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| 作者姓名： | 陈明生 解海军 |
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| 作者单位： | 煤炭科学研究总院西安分院,710054 |
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| 摘 要： | 由逆为拉斯变换将均匀大地面上的电偶极子源谐变电磁场转换为瞬变电磁场，并计算出δＢｚ（ｔ）／δｔ瞬态曲线；对分层大地面上的瞬变电磁场，采用折线逼近法计算余弦变换得出Ｈｚ（ｔ）瞬态曲线。从计算结果分析可知，瞬变电磁测深可实现较小极距探测较大深度。
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| 关 键 词： | 电偶极子 地面 瞬变电磁场 研究 |
STUDY ON THE TRANSIENT ELECTROMAGNETIC(TEM) SOUNDING WITHELECTRIC DIPOLE.Ⅲ.TEM FIELD ON THE EARTH SURFACE |
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| Chen Mingsheng,Xie Haijun.STUDY ON THE TRANSIENT ELECTROMAGNETIC(TEM) SOUNDING WITHELECTRIC DIPOLE.Ⅲ.TEM FIELD ON THE EARTH SURFACE[J].Coal Geology & Exploration,1999,27(3):58-61. |
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| Authors: | Chen Mingsheng Xie Haijun |
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| Institution: | Xi'an Branch of CCRI |
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| Abstract: | The harmonic field of electric dipole source on the uniform earth surface is converted into transient field by inverse Laplace transform,and the Bz(t)/ t transient curve is calculated.The Hz(t) transient curves on the stratified earth surface are obtained from cosine transform calculated by broken line approximation.From the analysis of calculating results it can be seen that the greater depth explored with the smaller offset in the TEM sounding could be achieved. |
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| Keywords: | electric dipole source earth surface TEM field study |
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