重构震源振幅谱一致性的吸收参数反演方法

doi:10.13810/j.cnki.issn.1000-7210.2024.01.013

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Abstract Spectral ratio（SR）method and centroid frequency shift（CFS）method are two kinds of Q-factor inversion methods widely used in seismic exploration. They mainly rely on a single attribute （e.g. logarithmic spectral ratio slope or centroid frequency） of the seismic spectral to estimate and invert absorption parameters. Therefore， the inversion results are easily affected by many factors such as seismic noise and wavefield interference. To relieve this problem， this paper proposes a novel absorption parameter inversion method based on the consistency of the reconstructed source amplitude spectrum. The core idea of this method is to propagate and compensate the seismic signals back to their source position along the ray paths and then use the amplitude spectrum consistency of seismic signal reconstruction at the source location to invert the formation absorption parameters. Compared with the Q-factor estimation methods based on centroid frequency， the source signature can be unknown and it is unnecessary to extract a specified attribute of the signal spectral. Therefore， the proposed method has great potential to improve the inversion accuracy of absorption parameters. The model experiments show that the proposed method has better anti-noise properties and higher inversion accuracy compared with SR and CFS. The proposed method is applied to Block M. The application example shows that the method can provide a high-precision absorption structure model for the subsequent absorption compensation and has a good industrial application prospect.

Key words： absorption parameter inversion source spectrum consistency back propagation absorption compensation absorption structure model

Received: 22 May 2023

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P631

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	Articles by authors
	MA Xiong
	SHEN Tianci
	LI Guofa
	GUI Zhixian
	LI Yonggen

Cite this article:

MA Xiong,SHEN Tianci,LI Guofa等. Absorption parameter inversion method based on reconstructed source amplitude spectrum consistency[J]. OGP, 2024, 59(1): 122-132.

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http://www.ogp-cn.com/EN/10.13810/j.cnki.issn.1000-7210.2024.01.013 OR http://www.ogp-cn.com/EN/Y2024/V59/I1/122

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