摘要
针对强干扰条件下EH4电磁测深曲线紊乱,相位信息不可靠,相关性差,甚至部分频点数据并不代表真正的地层信息的特点,采用回放时间序列,通过信号分析了解其干扰来源与类型;在此基础上设置不同类型的滤波器进行相应数字滤波,重构EH4电磁测深数据文件。在参考区域地质资料的基础上进行合理取舍,经实例验证,通过合理滤波后的剖面结果与地层吻合较为理想。
Considering disorder of EH4 electromagnetic sounding curves, not reliable phase information, and poor correlation, even more partly frequency stations could not reflect the characteristics of the strata in the condition of strong interferences. Therefore, the playback time series was applied and signal analysis was conducted to understand the source and types of the interferences, and then different types of filters were set up to conduct corresponding digital fihering, and then EH4 electromagnetic sounding data files were re - constructed. In reference to the regional geological information, the reasonable decision can he made. By the field case study, the verification result showed that the cross - section interpreted from the geophysical exploration is consistent with the practical stratum very well.
出处
《矿产勘查》
2014年第6期906-909,共4页
Mineral Exploration
基金
湖南省自然科学基金项目(编号:13JJ3088
14JJ6034)
湖南省自然科学基金湘潭市联合基金项目(编号:12JJ9008)共同资助
湖南省科技厅项目(编号:2012TP4023-6
2012TP4023-5)
关键词
强干扰
电导率成像系统
滤波
strong interference
conductivity imaging system
filtering
