用反射率法模拟扩散-粘性波衰减

IF 1.3 3区物理与天体物理 Q3 ACOUSTICS

Journal of Theoretical and Computational Acoustics Pub Date : 2019-10-15 DOI:10.1142/S2591728518500305

Haixia Zhao, Jinghuai Gao, Jigen Peng, Gulan Zhang

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引用次数: 4

摘要

地球材料中的地震波在很宽的频率范围内受到衰减和色散的影响。普遍接受的内在衰减和弥散机制是岩石孔隙空间中流体的存在。提出了用扩散-粘性模型来解释与油气储层有关的低频地震异常。但是，该模型只是对纵波的一种描述。本文首先讨论了扩展弹性扩散-粘性模型。然后，将反射率法推广到扩散粘性介质中。最后，我们建立了两个数值模型来模拟水平和倾斜多层介质中扩散-粘性波的衰减，并与粘弹性波的结果进行了比较。模拟结果表明，扩散-粘性波在穿越吸收层时具有较强的振幅衰减和相移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Modeling Attenuation of Diffusive-Viscous Wave Using Reflectivity Method

Seismic waves in earth materials are subject to attenuation and dispersion in a broad range of frequencies. The commonly accepted mechanism of intrinsic attenuation and dispersion is the presence of fluids in the pore space of rocks. The diffusive-viscous model was proposed to explain low-frequency seismic anomalies related to hydrocarbon reservoirs. But, the model is only a description of compressional wave. In this work, we firstly discuss the extended elastic diffusive-viscous model. Then, we extend reflectivity method to the diffusive-viscous medium. Finally, we present two numerical models to simulate the attenuation of diffusive-viscous wave in horizontal and dip multi-layered media compared with the results of viscoelastic wave. The modeling results show that the diffusive-viscous wave has strong amplitude attenuation and phase shift when it propagates across absorptive layers.

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来源期刊

Journal of Theoretical and Computational Acoustics Computer Science-Computer Science Applications

CiteScore

2.90

自引率

42.10%

发文量

期刊介绍： The aim of this journal is to provide an international forum for the dissemination of the state-of-the-art information in the field of Computational Acoustics. Topics covered by this journal include research and tutorial contributions in OCEAN ACOUSTICS (a subject of active research in relation with sonar detection and the design of noiseless ships), SEISMO-ACOUSTICS (of concern to earthquake science and engineering, and also to those doing underground prospection like searching for petroleum), AEROACOUSTICS (which includes the analysis of noise created by aircraft), COMPUTATIONAL METHODS, and SUPERCOMPUTING. In addition to the traditional issues and problems in computational methods, the journal also considers theoretical research acoustics papers which lead to large-scale scientific computations.