Surface‐related multiple prediction for ocean‐bottom node data based on demigration using downgoing wave imaging data

Author:

Tan Jun1234ORCID,Wang Jianhua45,Song Peng1234,Wang Shaowen1,Xia Dongming123,Du Guoning1,Wang Qianqian1

Affiliation:

1. College of Marine Geo‐sciences Ocean University of China Qingdao China

2. Laoshan Laboratory Qingdao China

3. Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education Qingdao China

4. National Engineering Research Center of Offshore Oil and Gas Exploration Tianjin China

5. CNOOC Research Institute Ltd. Beijing China

Abstract

AbstractOcean‐bottom node exploration has developed rapidly in marine seismic exploration. However, due to no illumination for the seafloor, and the observation system of the ‘less traces but more shots’ mode, the conventional surface‐related multiples elimination meets challenges for the application in the ocean‐bottom node exploration. This paper develops a new three‐dimensional surface‐related multiples elimination technique for ocean‐bottom node data. First, a three‐dimensional Kirchhoff pre‐stack time mirror migration algorithm is proposed to realize the accurate imaging for the seabed. Second, the time domain Kirchhoff demigration method is used to construct the contribution traces for multiples prediction. Finally, the surface multiples can be predicted based on the equation derived in the paper. Model tests and field data processing prove that our method can accurately predict the surface‐related multiples for ocean‐bottom node data and be helpful to the multiple elimination, which shows that the proposed technique has potential in actual ocean‐bottom node data processing.

Funder

Fundamental Research Funds for the Central Universities

National Natural Science Foundation of China

Major Scientific and Technological Innovation Project of Shandong Province

Publisher

Wiley

Subject

Geochemistry and Petrology,Geophysics

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