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Research on Seismic Wave Attenuation in Gas Hydrates Layer Using Vertical Cable Seismic Data

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Abstract

Vertical cable seismic (VCS) data are the most suitable seismic data for estimating the quality factor Q values of layers under the sea bottom by now. Here the quality factor Q values are estimated using the high-precision logarithmic spectrum ratio method for VCS data. The estimated Q values are applied to identify the layers with gas hydrates and free gas. From the results it can be seen that the Q value in layer with gas hydrates becomes larger and the Q value in layer with free gas becomes smaller than layers without gas hydrates or free gas. Additionally, the estimated Q values are used for inverse Q filtering processing to compensate the attenuated seismic signal’s high-frequency component. From the results it can be seen that the main frequency of seismic signal is improved and the frequency band is broadened, the resolution of the VCS data is improved effectively.

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Acknowledgements

This research was funded by the national key research and development program of China (2017YFC0307405) and the China Geological Survey Project (Grant number 201100307).

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Authors and Affiliations

  1. Key Laboratory of Geo-detection, Ministry of Education, China University of Geosciences, Beijing, People’s Republic of China

    Xiangchun Wang & Lunhang Liang

  2. Guangzhou Marine Geological Survey of China Geological Survey, Guangzhou, 510760, People’s Republic of China

    Zhongliang Wu

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  1. Xiangchun Wang
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  2. Lunhang Liang
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  3. Zhongliang Wu
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Correspondence to Xiangchun Wang.

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Wang, X., Liang, L. & Wu, Z. Research on Seismic Wave Attenuation in Gas Hydrates Layer Using Vertical Cable Seismic Data. Pure Appl. Geophys. 175, 3451–3462 (2018). https://doi.org/10.1007/s00024-018-1918-6

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  • DOI: https://doi.org/10.1007/s00024-018-1918-6

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