赵维娜^1,2,,
张训华^2,3,
王惠刚⁴,
陈珊珊^2,3,
吴志强^2,3,,,
郝天珧⁵,
郑彦鹏⁶,
刘凯⁶
1. 西北工业大学青岛研究院, 青岛 266200
2. 青岛海洋科学与技术试点国家实验室, 海洋矿产资源评价与探测技术功能实验室, 青岛 266237
3. 青岛海洋地质研究所, 青岛 266071
4. 西北工业大学航海学院, 西安 710072
5. 中国科学院地质与地球物理研究所, 北京 100029
6. 自然资源部第一海洋研究所海洋地质与成矿作用重点实验室, 青岛 266061

基金项目: 中央高校基本科研业务费专项资金(31020190QD032), 国家自然科学基金项目(41806048, 41210005, 41230318, 41604046), 青岛海洋科学与技术国家实验室鳌山科技创新计划项目(2015ASKJ03-海底资源)联合资助


详细信息

作者简介: 赵维娜, 女, 1988年生, 博士, 主要从事主动源深地震研究.E-mail:ouczwn@163.com

通讯作者: 吴志强, 男, 1964年生, 博士, 主要从事海洋油气地球物理勘探研究工作.E-mail:wuzq_1964@163.com

中图分类号: P738

收稿日期:2019-09-30
修回日期:2020-03-12
上线日期:2020-06-05

Characteristics and noise combination suppression of wide-angle Ocean Bottom Seismography (OBS) data in shallow water: a case study of profile OBS2016 in the South Yellow Sea

ZHAO WeiNa^1,2,,
ZHANG XunHua^2,3,
WANG HuiGang⁴,
CHEN ShanShan^2,3,
WU ZhiQiang^2,3,,,
HAO TianYao⁵,
ZHENG YanPeng⁶,
LIU Kai⁶
1. Qingdao Research Institute, Northwestern Polytechnical University, Qingdao 266200, China
2. Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
3. Qingdao Institute of Marine Geology, Qingdao 266071, China
4. School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
5. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
6. Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China


More Information

Corresponding author: WU ZhiQiang,E-mail:wuzq_1964@163.com

MSC: P738

--> Received Date: 30 September 2019
Revised Date: 12 March 2020
Available Online: 05 June 2020


摘要
摘要:2016年6月在南黄海海域实施了海底地震仪（OBS）的二维深地震探测.本文详细分析了在该次地震探测中获得的浅水水域OBS数据的特征，提出了噪声的组合压制方法.研究表明，浅海水域的OBS数据在系统时间、能量及子波等方面存在明显差异，海底多次波干扰严重、有效频段中陷波问题突出，原始台站记录信噪比低、品质差、大炮检距的有效震相难以识别和拾取.本文提出的噪声组合压制处理技术与流程，主要由基于统计子波反褶积的子波整形、基于多项式插值的t-x域线性噪声压制和采用自动搜索的海底多次波压制等三部分组成.净化处理之后，反射/折射震相的波组特征清晰，信噪比得到有效改善与较大提高，可识别震相的范围较常规处理平均扩大60%以上.本文完善了浅水区OBS数据处理的步骤与流程，将为后续地壳结构研究提供可靠的基础数据，可更好的服务于地壳深地震及油气资源的探测.
关键词: 海底地震仪/
广角地震/
噪声组合压制/
浅海/
南黄海

Abstract:A two-dimensional seismic survey was carried out in June 2016 along the east-west direction in the South Yellow Sea. We took the actual data processing of survey line (OBS 2016) as an example to analyze the data characteristics in shallow water and the combined suppression method of noise in detail. The study shows that OBS data in shallow water have obvious differences in system time, energy and wavelet, and develop submarine multiple with notch. The signal-to-noise ratio of the original record is low, and a far offset seismic phase (>50 km) is difficult to identify and pick up. The noise combination suppression and processing technology used in this paper are mainly composed of wavelet shaping based on wavelet de-convolution, t-x linear noise suppression based on polynomial interpolation, and seabed multiple suppression using automatic searching. The purification results show the characteristics of the wave group are clear, the signal-to-noise ratio is greatly improved, and the range of recognized seismic phase is larger than that on the conventional records (more 60% on average). OBS data processing steps and processes aiming at the shallow water have been improved in this paper, which will provide reliable basic data for subsequent crustal structural research and better serve the deep crust, oil and gas resources exploration.
Key words:Ocean Bottom Seismography/
Wide-angle seismic data/
Noise combination suppression/
Shallow water/
South Yellow Sea



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