应用逆散射级数波场预测和2D卷积盲分离压制层间多次波

doi:10.13810/j.cnki.issn.1000-7210.2020.03.005

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Abstract Multiple suppression is an important step of seismic data processing.The prediction subtraction method based on wave equation is a common one to suppress internal multiples.This method includes two steps: internal multiples prediction and adaptive subtraction.After introducing hypothesis conditions such as step function and finite integral interval,we proposed a simplified formula to simplify the inverse scattering series for predicting internal multiples,and then introducing adaptive subtraction based on 2D blind separation of convolved mixtures to conduct adaptive subtraction with matching filters.Synthetic and field data have de-monstrated that the method is data-driven and independent on a velocity model for predicting internal multiples.Furthermore,compared with the traditional method based on L₂-norm and single-channel blind separation of convolved mixtures,the method based on multi-channel blind separation of convolved mixtures can better protect effective primary waves while suppressing internal multiples.

Key words： internal multiples inverse scattering series 2D blind separation of convolved mixtures adaptive subtraction data-driven

Received: 22 November 2019

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P631

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	Articles by authors
	BI Lifei
	QIN Ning
	LI Zhongxiao
	LIANG Hongxian
	LI Zhenchun
	DOU Jingying

Cite this article:

BI Lifei,QIN Ning,LI Zhongxiao等. Wavefield prediction with inverse scattering series and 2D blind separation of convolved mixtures for suppressing internal multiples[J]. OGP, 2020, 55(3): 521-529.

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http://www.ogp-cn.com/EN/10.13810/j.cnki.issn.1000-7210.2020.03.005 OR http://www.ogp-cn.com/EN/Y2020/V55/I3/521

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