Swells in marine seismic data disrupt the continuity of the reflection events and make interpretation difficult. The swell effect removal process consists of sea-bottom detection and correction, which removes the swell effect by shifting the detected sea-bottom signal to the known or estimated seafloor location. The quality of correction depends on the accuracy of the sea-bottom detection. Since general sea-bottom signal detection techniques have been applied directly after pre-processing, many mispick scenarios exist due to the characteristics of the data, and additional processes are needed. This study proposes a method for accurately detecting sea-bottom reflection signals using the guideline. The errors are caused by mistaking other reflection events as sea-bottom signals. The guideline can improve detection accuracy by providing rough event times of sea-bottom reflection. The guideline was extracted from the gradient vector flow (GVF) technique, a segmentation method in image processing. In the GVF data, the seafloor signals are smoothed, and the energy is focused on the sea bottom. The threshold method detected sea-bottom signals in the range after the guideline. The detected signals were shifted to estimated seafloor locations to attenuate the swell effect. The GVF-based guideline (GVF-GL) method was applied to field data acquired by the airgun and chirp sources with different frequencies. The sea-bottom location was successfully detected, and the continuity of the sea-bottom and subsurface signals in the section was improved.

Kyoungmin Lim

Jiho Ha

Jungkyun Shin

Sungryul Shin

Wookeen Chung

Journal of Environmental and Engineering Geophysics

JEEG (ISSN 1083-1363) 是环境与工程地球物理学会 (EEGS) 的同行评审期刊。 JEEG 欢迎有关近地表地球物理学在环境、工程和采矿问题上的新发展的手稿，以及新的近地表地球物理学案例历史和针对近地表地球物理学界的新硬件的描述。

The Journal of Environmental and Engineering Geophysics (ISSN 1083-1363) is a peer-reviewed journal published by the Environmental and Engineering Geophysical Society (EEGS). The journal welcomes manuscripts on new developments in near-surface geophysics related to environmental, engineering, and mining issues, as well as descriptions of new hardware and case studies in near-surface geophysics.

《Journal of Environmental and Engineering Geophysics》 (ISSN 1083-1363) 是环境与工程地球物理学会 (EEGS) 出版的同行评审期刊。该期刊欢迎关于近地表地球物理学在环境、工程和采矿领域的新发展手稿，以及新的近地表地球物理学案例研究和针对该领域的新硬件的描述。

Category	Quartile
工程技术	4
工程技术, 工程地质	4
工程技术, 地球化学与地球物理	4

Seismic Swell Effect Correction Using GVF-Based Guideline

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Journal Info

Category	Quartile
GEOCHEMISTRY & GEOPHYSICS	3