Abstract
Ground roll waves interfere with seismic data. The suppression of ground roll waves based on the division of wavelet frequencies considers the low-frequency characteristics of ground roll waves. However, this method will not be effective when the ground roll wave and the effective signal have the same frequency bands because of overlapping. The radial trace transform (RTT) considers the apparent velocity difference between the effective signal and the ground roll wave to suppress the latter, but affects the low-frequency components of the former. This study proposes a ground roll wave suppression method by combining the wavelet frequency division and the RTT based on the difference between the ground roll wave velocity and the effective signal and their energy difference in the wavelet domain, thus making full use of the advantages of both methods. First, we decompose the seismic data into different frequency bands through wavelet transform. Second, the RTT and low-cut filtering are applied to the low-frequency band, where the ground roll waves are appearing. Third, we reconstruct the seismic record without ground roll waves by using the inverse RTT and the remaining frequency bands. The proposed method not only improves the ground roll wave suppression, but also protects the signal integrity. The numerical simulation and real seismic data processing results suggest that the proposed method has a strong ability to denoise while preserving the amplitude.
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The authors express their sincere thanks to Prof. Li Guofa and the anonymous reviewers who improved the manuscript with their comments.
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This research was supported by the National Science and Technology Major Project (No. 2011ZX05007-006), the 973 Program of China (No. 2013CB228604), and the major Project of Petrochina (No. 2014B-0610).
Wang Wan-Li is an engineer who gained his M.S. in Earth exploration and information technology from China University of Petroleum in 2012. He majored in Earth exploration and information technology, and now works in the PetroChina Research Institute of Petroleum Exploration and Development Northwest. He is mainly engaged in the research of seismic data processing of complex structure and reservoir prediction.
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Wang, WL., Yang, WY., Wei, XJ. et al. Ground roll wave suppression based on wavelet frequency division and radial trace transform. Appl. Geophys. 14, 96–104 (2017). https://doi.org/10.1007/s11770-017-0595-z
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DOI: https://doi.org/10.1007/s11770-017-0595-z