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| 3 D denoising method through visual speed in frequency wavenumber domain |
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HE Xu li1,2, LIU Su qin1, TONG Zhao qi1
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(1.Faculty of Computer Communication ＆ Engineering in China University of Petroleum, Dongying 257061, China;2.College of Geo Resources and Information in China University of Petroleum, Dongying 257061, China)
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| Abstract: |
| A 3 D denoising method was put forward. The noise through visual speed in 3 D frequency wavenumber domain is removed utilizing the corresponding relationship between the time spatial coordinates and Fourier transformation. The Gibbs effect is avoided by weighting and attenuating the cosine function. The results show that the denoising method can effectively distinguish valid information from interfering information. When the visual speed of the valid information and interfering information are very close, the valid information can be properly retained while removing the interfering information. Different denoising steps will be used when the signal to noise ratio of seismic data is general or very low. The denoising method is used in actual seismic data processing. It can promote signal to noise ratio greatly, and achieve good effect in keeping authenticity and extent. 3 D denoising method has many advantages compared with 2 D denoising method. |
| Key words: seismic prospecting seismic data processing seismic profile 3 D denoising frequency wavenumber domain visual speed common shot geophone distance Fourier transformation |
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