基于变分模态分解的涌浪静校正新技术及其在海洋单道地震数据处理中的应用

doi:10.11978/2024216

Abstract

Abstract:

The presence of offshore swell seriously affects the quality of high-resolution marine seismic data, posing substantial challenges for subsequent processing and geological interpretation. Existing swell static correction methods — whether based on intrinsic data features such as model channel cross-correlation and medium/mean filtering, or externally constrained approaches like single/multi-beam bathymetry — have inherent limitations in their applicability. Therefore, developing a simple, fast, and efficient swell static correction method is of great significance. To address this widespread issue, this paper proposes a more universal swell static correction technique. After briefly introducing its fundamental principles and implementation steps, we first analyze the swell effect on synthetic data from a horizontal layered model, then apply the method to field data for swell suppression. The reliability and effectiveness of the proposed method are quantitatively verified. The results demonstrate that regardless of whether the seafloor exhibit gentle undulations or complex rugged topography, our method effectively suppresses high-frequency jitter and energy dispersion in reflection events caused by swell effects. This enhances reflector clarity, smoothness, and continuity, significantly improving the resolution and signal-to-noise ratio of seismic sections. The method thus facilitates subsequent stratigraphic division and seismic interpretation.

Key words: swell static correction, variational mode decomposition (VMD), Pearson correlation coefficient, signal-to-noise ratio (SNR), single-channel seismic

CLC Number:

P731.22

WANG Qiang, ZHENG Yu, LI Jinmei, ZHAO Minghui, ZHANG Jiazheng. A new swell static correction technique based on variational mode decomposition and its application in marine single-channel seismic data processing[J].Journal of Tropical Oceanography, 2025, 44(5): 166-178.

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A new swell static correction technique based on variational mode decomposition and its application in marine single-channel seismic data processing

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[1]	LI Yonghang, JIA Lei, NI Yugen, HE Jian, MU Zelin, WEN Mingming, SHAN Chenchen. Geophysical characteristics and favorable occurrence signs of marine sand-gravel body in Taiwan banks^* [J]. Journal of Tropical Oceanography, 2021, 40(5): 101-110.
[2]	LI Shou-jun,CHU Feng-you,FANG Yin-xia,WU Zi-yin,NI Yu-gen. Associated interpretation of sub-bottom and single-channel seismic profiles from slope of Shenhu Area in the northern South China Sea—characteristics of gas hydrate sediment [J]. Journal of Tropical Oceanography, 2010, 29(4): 56-62.