Correction of CSAMT Static Shift Using Transformed Phase
详细信息
- 责任者：Shi Xianxin (Xi’an Research Institute of China Coal Technology & Engineering Group ; Xi’an 710077 ; China) ; Yan Shu
- 刊名：Oil Geophysical Prospecting
- 出版年：2011
- 卷期：46(5)
- 关键词：可控源音频大地电磁法 ; controlled-source audio magnetotelluric methods
- 页码：p.802-809
- 图表：4 illus., 2 tables, 25 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
The static shift makes measured apparent resistivity curves up and down parallel shifts in double logarithmic coordinate system. In this paper, transformed phase curves from single electric field component in measuring data are used to remove static shifts. The results show that the approach is effective. There are no under-corrected or over-corrected problems and no limitations of the observation point spread. The litter difference between the results of quantitative inversion with transformed phase and the results of inversion with amplitude of the electric field can be ignored. Just as EMP method in CSAMT data processing and interpretation, phase curves can be used not only for static shift correction but also in data interpretation with apparent resistivity.
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