Application of the Dip Angel Common Reflection SurfaceStack in 3D Low S/N Area Seismic Data Processing

ZHANG Zhen-bo,DAI Yi-ding,XUAN Yi-hua,LIU Bin,XUE Zhi-gang

doi:10.11764/j.issn.1672-1926.2014.04.582

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 4: 582 - 587

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.04.582

Application of the Dip Angel Common Reflection SurfaceStack in 3D Low S/N Area Seismic Data Processing

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Shenzhen Branch of CNOOC Ltd.,Shenzhen 518067,China

Received date: 2013-05-07

Revised date: 2013-06-26

Online published: 2014-04-10

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Abstract

With the development of seismic survey in the South China Sea,the medium and deep layer is becoming the main survey target,mainly including the Zhujiang Group and basement,and the degree of exploration of them determines the reserve volume of Eastern South China Sea.Some kinds of interference factors affect the imaging quality of the medium and deep seismic data and survey of the South China Sea.Then the most important and urgent problem is how to improve the imaging quality.Normal CMP stack theory is based on the horizontal layer.However,the premise of the dip angle common reflection surface stack method is related not with the dip angle closely,subsurface reflectors can be any angle closer to the actual geological conditions compared to the CMP stack theory.This stack method stacks the entire reflection wave in CMP and in Fresnel zone,and then forms the super-coverage and improves the S/N obviously.After the pre-theoretical research,data test and the application,this method is confirmed to improves S/N of the seismic data and fits the complex formation geological conditions and the solubility of the data can also be improved.The further application of the method could guide the survey and improve the success rate and the scale of reserves in South China Sea.

Key words： Common reflection surface; S/N; Dip angle; CMP; Deep water

Cite this article

ZHANG Zhen-bo,DAI Yi-ding,XUAN Yi-hua,LIU Bin,XUE Zhi-gang . Application of the Dip Angel Common Reflection SurfaceStack in 3D Low S/N Area Seismic Data Processing[J]. Natural Gas Geoscience, 2014 , 25(4) : 582 -587 . DOI: 10.11764/j.issn.1672-1926.2014.04.582

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