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庐枞矿集区大地电磁测深强噪声的影响规律

DOI: 10.6038/j.issn.0001-5733.2012.12.027, PP. 4147-4159

Keywords: 大地电磁测深,矿集区,强噪声,波形,相干度,信噪比

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Abstract:

天然大地电磁场信号微弱,极化方向随机,极易受电磁噪声污染.张量阻抗分析、远参考技术、Robust估计等对随机噪声和不相关噪声有比较好的压制效果,但对强的相关噪声目前还没有有效的压制方法.庐枞矿集区人烟稠密、工业发达,是我国著名的铁、铜、硫等矿产基地之一,区内强烈的工业、通讯、矿山、民用等电磁干扰严重污染了大地电磁测深数据.本文首先根据实测的电磁场时间域波形和卡尼亚电阻率测深曲线形态,挑选出基本未受噪声污染的测点(Y1650).然后利用数学形态学从受严重污染的电磁场时间序列中提取出类方波、三角波、阶跃、脉冲和充放电5种典型噪声的波形,并以不同的方式将这些噪声波形与Y1650的电磁场波形叠加,对比分析加噪后Y1650点电阻率和相位测深曲线的变化,进而归纳出典型强噪声对庐枞大地电磁测深资料的影响规律,为进一步压制强噪声和资料处理提供依据.

References

[1]  陈乐寿, 王光锷. 大地电磁测深法. 北京: 地质出版社, 1990. Chen L S, Wang G E. Magnetotelluric Sounding Method (in Chinese). Beijing: Geological Publishing House, 1990.
[2]  Gamble T D, Goubau W M, Clarke J. Magnetotellurics with a remote magnetic reference. Geophysics, 1979, 44(1): 53-68.
[3]  邓前辉, 白改先. 互功率法在大地电磁阻抗张量估算中的应用. 石油地球物理勘探, 1982, (4): 57-64. Deng Q H, Bai G X. Crosspower method applied in the estimation of magnetotelluric impendance tensor. Oil Geophysical Prospecting (in Chinese), 1982, (4): 57-64.
[4]  杨生. 大地电磁测深法环境噪声抑制研究及其应用. 长沙: 中南大学, 2004. Yang S. The study of restraining environmental noise and its application in magnetotelluric sounding (in Chinese). Changsha: Central South University, 2004.
[5]  考夫曼, 凯勒. 大地电磁测深法. 刘国栋译. 北京: 地震出版社, 1987. Kaufman A A, Keller G V. Magnetotelluric Sounding Method (in Chinese). Translated by Liu G D. Beijing: Seismological Press, 1987.
[6]  徐志敏, 汤井田, 强建科. 矿集区大地电磁强干扰类型分析. 物探与化探, 2012, 36(2): 214-219. Xu Z M, Tang J T, Qiang J K. An analysis of the magnetotelluric strong interference types in ore concentration areas. Geophysical and Geochemical Exploration (in Chinese), 2012, 36(2): 214-219.
[7]  孙洁, 普光文, 白登海等. 大地电磁测深资料的噪声干扰. 物探与化探, 2000, 24(2): 119-127. Sun J, Jin G W, Bai D H, et al. The noise interference of magnetotelluric sounding data. Geophysical and Geochemical Exploration (in Chinese), 2000, 24(2): 119-127.
[8]  胡家华, 陈清礼, 严良俊等. MT资料的噪声源分析及减小观测噪声的措施. 江汉石油学院学报, 1999, 21(4): 69-71. Hu J H, Chen Q L, Yan L J, et al. Analyzing noise sources of MT data and minimizing measurement noise. Journal of Jianghan Petroleum Institute (in Chinese), 1999, 21(4): 69-71.
[9]  Egbert G D, Booker J R. Robust estimation of geomagnetic transfer functions. Geophys. J. Roy. Astr. Soc., 1986, 87(1): 173-194.
[10]  Sutarno D, Vozoff K. Robust M-estimation of magnetotelluric impedance tensors. Expl. Geophys., 1989, 20(3): 383-398.
[11]  林长佑, 武玉霞, 刘晓玲. 大地电磁响应函数的除偏估算和误差的研究. 西北地震学报, 1988, 10(3): 25-38. Lin C Y, Wu Y X, Liu X L. On the unbiased estimation and error research of magnetotelluric response functions. Northwestern Seismological Journal (in Chinese), 1988, 10(3): 25-38.
[12]  严良俊, 胡文宝, 陈清礼等. 远参考MT方法及其在南方强干扰地区的应用. 江汉石油学院学报, 1998, 20(4): 34-38. Yan L J, Hu W B, Chen Q L, et al. Application of remote reference MT to noisy area. Journal of Jianghan Petroleum Institute (in Chinese), 1998, 20(4): 34-38.
[13]  陈清礼, 胡文宝, 苏朱刘等. 长距离远参考大地电磁测深实验研究. 石油地球物理勘探, 2002, 37(2): 145-148. Chen Q L, Hu W B, Su Z L, et al. Study for long-distant and far-referential MT. Oil Geophysical Prospecting (in Chinese), 2002, 37(2): 145-148.
[14]  Ritter O, Junge A, Dawes G. New equipment and processing for magnetotelluric remote reference observations. Geophys. J. Int., 1998, 132(2): 535-548.
[15]  杨生, 鲍光淑, 张全胜. 远参考大地电磁测深法应用研究. 物探与化探, 2002, 26(1): 27-31, 49. Yang S, Bao G S, Zhang Q S. A study on the application of remote reference magnetotelluric sounding technique. Geophysical and Geochemical Exploration (in Chinese), 2002, 26(1): 27-31, 49.
[16]  王家映. 电磁阵列剖面法的基本原理. 地球科学, 1990, 15(增刊): 1-11. Wang J Y. The basic principle of the electromagnetic array profiling. Earth Science (in Chinese), 1990, 15(Suppl.): 1-11.
[17]  Bahr K. Interpretation of the magnetotelluric impedance tensor: regional induction and local telluric distortion. J. Geophys., 1989, 62: 119-129.
[18]  杨生, 鲍光淑, 李爱勇. MT法中静态效应及阻抗张量静态校正法. 中南工业大学学报(自然科学版), 2002, 33(1): 8-13. Yang S, Bao G S, Li A Y. The static migration to MT data and the impedance tensor static correction method. Journal of Central South University of Technology (Natural Science) (in Chinese), 2002, 33(1): 8-13.
[19]  汤井田, 李晋, 肖晓等. 数学形态滤波与大地电磁噪声压制. 地球物理学报, 2012, 55(5): 1784-1793. Tang J T, Li J, Xiao X, et al. Mathematical morphology filtering and noise suppression of magnetotelluric sounding data. Chinese J. Geophys. (in Chinese), 2012, 55(5): 1784-1793.

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