应用阈值控制的弹性波高斯束偏移方法

doi:10.13810/j.cnki.issn.1000-7210.2023.05.010

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Abstract The Gaussian beam migration method has high computational efficiency and imaging accuracy, and it is widely used due to its flexibility and efficiency. However, in the face of a low signal-to-noise ratio of seismic data, the conventional elastic wave Gaussian beam method is susceptible to noise interference, resulting in unsatisfactory imaging results. To address the above problems, this paper proposes an optimized method of elastic wave Gaussian beam migration based on threshold control. The method obtains the threshold-controlled slant stack formula by setting the threshold function and applying it to the Tau-p transform and then obtains the threshold-controlled elastic wave Gaussian beam migration imaging formula based on the intercorrelation imaging condition. The results of model trial calculations show that the adoption of a threshold-controlled elastic wave Gaussian beam migration imaging method can effectively suppress imaging noise, improve the imaging signal-to-noise ratio, and enhance the quality of migration imaging.

Key words： elastic wave Gaussian beam migration noise suppression slant stack threshold control imaging accuracy

Received: 14 November 2022

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P631

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	Articles by authors
	MENG Fankun
	LI Zhenchun
	FU Jiyou
	ZHANG Kai
	XU Xuecheng
	LIU Qiang

Cite this article:

MENG Fankun,LI Zhenchun,FU Jiyou等. Elastic wave Gaussian beam migration method based on threshold control[J]. OGP, 2023, 58(5): 1133-1141.

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http://www.ogp-cn.com/EN/10.13810/j.cnki.issn.1000-7210.2023.05.010 OR http://www.ogp-cn.com/EN/Y2023/V58/I5/1133

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