Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data

Yanliang PEI; Mingming WEN; Zhengrong WEI; Baohua LIU; Kai LIU; Guangming KAN

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Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data

Geomorphology and geological structure of South China Sea | Updated：2024-10-12

- Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data
- Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data
- 海洋湖沼学报(英文) 2023年41卷第2期页码：644-659
- Affiliations：
  
  1. Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
  2. Guangzhou Marine Geological Survey, China Geological Survey, Ministry of Natural Resources, Guangzhou 511458, China
  3. College of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
  4. Laoshan Laboratory, Qingdao 266237, China
- Author bio：
  
  weizhro@163.com
- Funds：
  
  the National Key R&D Program of China(2016YFC0303900);the Laoshan Laboratory(MGQNLM-KF201807;LSKJ202203604);the National Natural Science Foundation of China(42106072)
- DOI：
  中图分类号：
- 收稿：2022-01-30，
  
  纸质出版：2023-03-01
- Accepted：
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Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data[J]. 海洋湖沼学报(英文), 2023,41(2):644-659.

PEI Yanliang,WEN Mingming,WEI Zhengrong,et al.Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data[J].Journal of Oceanology and Limnology,2023,41(02):644-659.
Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data[J]. 海洋湖沼学报(英文), 2023,41(2):644-659. DOI：

PEI Yanliang,WEN Mingming,WEI Zhengrong,et al.Data processing of the Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system and application to South China Sea data[J].Journal of Oceanology and Limnology,2023,41(02):644-659. DOI：

摘要

Abstract

The Kuiyang-ST2000 deep-towed high-resolution multichannel seismic system was designed by the First Institute of Oceanography

Ministry of Natural Resources (FIO

MNR). The system is mainly composed of a plasma spark source (source level: 216 dB

main frequency: 750 Hz

frequency bandwidth: 150‍‍‍–‍1 200 Hz) and a towed hydrophone streamer with 48 channels. Because the source and the towed hydrophone streamer are constantly moving according to the towing configuration

the accurate positioning of the towing hydrophone array and the moveout correction of deep-towed multichannel seismic data processing before imaging are challenging. Initially

according to the characteristics of the system and the towing streamer shape in deep water

travel-time positioning method was used to construct the hydrophone streamer shape

and the results were corrected by using the polynomial curve fitting method. Then

a new data-processing workflow for Kuiyang-ST2000 system data was introduced

mainly including float datum setting

residual static correction

phase-based moveout correction

which allows the imaging algorithms of conventional marine seismic data processing to extend to deep-towed seismic data. We successfully applied the Kuiyang-ST2000 system and methodology of data processing to a gas hydrate survey of the Qiongdongnan and Shenhu areas in the South China Sea

and the results show that the profile has very high vertical and lateral resolutions (0.5 m and 8 m

respectively)

which can provide full and accurate details of gas hydrate-related and geohazard sedimentary and structural features in the South China Sea.

关键词

Keywords

references

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