Adaptive focus beam migration method in visco-acoustic media

IF 1.6 3区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Kai Zhang, Yiming Pan, Yunyun Sang, Xuecheng Xu, Fankun Meng
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引用次数: 0

Abstract

Abstract Due to the prevalent viscosity in the subsurface medium, seismic waves experience amplitude attenuation effects during their propagation in visco-acoustic media. Therefore, it is crucial to develop a method that can compensate for wavelet amplitude attenuation and enhance imaging quality. In this paper, we derive an expression for corrected ray complex travel time by introducing the quality factor Q. Additionally, we modify the classical Gaussian beam propagation operator to an adaptive focus type propagation operator. Our research presents an adaptive focused beam migration imaging method specifically designed for viscous acoustic media, incorporating a combination of traditional Gaussian beam migration imaging methods. In comparison to traditional migration methods, the proposed approach achieves energy focusing along the phase axis and significantly improves imaging quality. The validity and effectiveness of our method are confirmed through the obtained imaging results.
粘声介质中的自适应聚焦束偏移方法
由于地下介质中普遍存在的黏性,地震波在黏性声介质中传播时会产生振幅衰减效应。因此,开发一种补偿小波振幅衰减、提高成像质量的方法至关重要。本文通过引入质量因子q,导出了修正后的射线复走时表达式,并将经典高斯光束传播算子修改为自适应聚焦型传播算子。我们的研究提出了一种专门针对粘性声学介质的自适应聚焦束偏移成像方法,结合了传统的高斯束偏移成像方法。与传统的偏移方法相比,该方法实现了沿相轴方向的能量聚焦,显著提高了成像质量。通过所获得的成像结果,验证了该方法的有效性。
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来源期刊
Journal of Geophysics and Engineering
Journal of Geophysics and Engineering 工程技术-地球化学与地球物理
CiteScore
2.50
自引率
21.40%
发文量
87
审稿时长
4 months
期刊介绍: Journal of Geophysics and Engineering aims to promote research and developments in geophysics and related areas of engineering. It has a predominantly applied science and engineering focus, but solicits and accepts high-quality contributions in all earth-physics disciplines, including geodynamics, natural and controlled-source seismology, oil, gas and mineral exploration, petrophysics and reservoir geophysics. The journal covers those aspects of engineering that are closely related to geophysics, or on the targets and problems that geophysics addresses. Typically, this is engineering focused on the subsurface, particularly petroleum engineering, rock mechanics, geophysical software engineering, drilling technology, remote sensing, instrumentation and sensor design.
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