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| The application of wavelet transform to suppressing static effect |
| OU Xiao-Yi |
| Guangxi Geophysical Investigation Institute, Liuzhou 545005, China |
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Abstract In this paper, the magnetotelluric two-dimensional finite element forward modeling program was used to simulate a two-floor earth geoelectric model of low resistance static shift and study the principle of static shift and its impact. The wavelet transform was also used to suppress the static shift. In contrast to other conventional spatial filtering methods, the method adopted by the authros can obtain a better suppression result, thus confirming the feasibility and effectiveness of applying the wavelet transform method to suppressing the static shift. Finally, the authors used the wavelet transform method to analyze measured EH-4 data in a work area, identified and determined the static shift from the mathematical model. It is shown that wavelet transform method for data processing can attain a good suppression. This method can retain the original layered structure information and local anomalies caused by the geological anomaly body while suppressing the static shift.
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Received: 11 May 2013
Published: 10 December 2014
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