True Amplitude Seismic Migration Operator in 3‐D Heterogeneous Media

Cui, Xingfu; Zhang, Guan‐Quan; Wu, Ya‐Li

doi:10.1002/cjg2.523

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…The reflectivity is then represented by R = U/D based on the Snell law. Stephen [12] proposed 3 kinds of amplitude preserving imaging conditions of the one-way wave equation applied to heterogeneous media.…”

Section: Imaging Condition To the Amplitude Preservingmentioning

confidence: 99%

Seismic Imaging Under the Irregular Deep Water Bottom

Chang

Liu

et al. 2008

Chinese J of Geophysics

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The basic theory of the true amplitude common‐shot prestack wave equation migration is discussed. Numerical experiments demonstrate the robust of amplitude preserving characteristics with true amplitude prestack wave equation migration. This method can increase the resolution of imaging in a complex media, in contrast to non‐true amplitude migration, demonstrating its effectiveness. Using real data from a seismic exploration, the method is demonstrated with an attempt to handle well the difficulty of making images in the deep rugged sea bottom and approved the true amplitude migration can remove the deep artifacts caused by rugged sea bottom.

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Section: Imaging Condition To the Amplitude Preservingmentioning

confidence: 99%

Seismic Imaging Under the Irregular Deep Water Bottom

Chang

Liu

et al. 2008

Chinese J of Geophysics

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“…Zhang (2002), Xu et al (2001), and Cui et al (2004) modified the one way wave operator by importing differential operators, Λ and Γ to obtain maximum true amplitude during the process of downward continuation. The concrete expression in (ω, k) is: The function of Γ in (21) is to recover the amplitude.…”

Section: Wave Field Continuation and True Amplitude Processingmentioning

confidence: 99%

AVO inversion based on common shot migration

2006

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Conventional AVO inversion utilizes the trace amplitudes of CMP gathers. There are three main factors affecting the accuracy of the inversion. First, CMP gathers are based on the hypothesis of horizontal layers but most real layers are not horizontal. Greater layer dip results in a greater difference between the observed CMP gathers and their real location. Second, conventional processing flows such as NMO, DMO, and deconvolution will distort amplitudes. Third, the formulation of reflection coefficient is related to incidence angles and it is difficult to get the relationship between amplitude and incidence angle. Wave equation prestack depth migration has the ability of imaging complex media and steeply dipping layers. It can reduce the errors of conventional processing and move amplitudes back to their real location. With true amplitude migration, common angle gathers abstraction, and AVO inversion, we suggest a method of AVO inversion from common shot gathers in order to reduce the effect of the above factors and improve the accuracy of AVO inversion.

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“…Originated from early 1970s, the modern seismic migration method initially tried to back propagate the reflected seismic wave observed on the surface to its starting location through mathematical method, and gain the image which can indicate the location of the subsurface reflectivity (Claerbout, 1971(Claerbout, , 1976Ma et al, 1898;Robein, 2010;Stolt, 1986;Bleistein et al, 1999;Li et al, 2011). After 40 years development, seismic migration has developed from post-stack to pre-stack migration, from two-dimension to three-dimension, from time domain migration to depth domain migration, from isotropic medium to anisotropic medium, from scalar acoustic wave equation to vector elastic wave equation (Du, 2012;Chang, 1994), from conventional migration without iteration to true amplitude migration and iterative least squares migration (Zhang, 2013a;Yao, 2012aYao, , 2012bDong, 2012;Gray, 1997;Sun et al, 2002;Cui et al, 2004;Liu et al, 2006;Zhang, 2006;Li, 2008;Zhou et al, 2014), and it also tried to realize velocity and impedance inversion (Zhang, 2013b(Zhang, , 2013c. The calculation of seismic migration can be divided into two broad categories: 1) is based on Kirchhoff integral, 2) is based on solving differential equation.…”

Section: Introductionmentioning

confidence: 99%

Re‐Exploration into Migration of Seismic Data

Chen

Hua‐Ming

2016

Chinese J of Geophysics

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The formula of migration of seismic data is re‐derived by using the forward propagation equations of seismic waves, in which the migration of seismic data is viewed as an approximate solution to the linear waveform inverse problem, a scattering migration method suitable for scattering seismic data and a reflection migration method suitable for reflection seismic data are proposed. Based on the scattering theory of seismic wave propagation, firstly we study and establish the migration theory for scattering seismic data through the linear equation describing the forward propagation of primary scattering wave. A subsurface reflectivity function is derived by applying the high frequency approximation to the spatial variation of velocity perturbation function generating the scattering field, and a forward propagation equation of reflection wave using the reflectivity function is derived from the propagation equation of scattering wave, then we study and establish the migration theory for reflection seismic data through the linear equation describing the forward propagation of primary reflection wave. We pointed out and corrected the shortcomings in Claerbout's migration method. The migration method of seismic data introduced in this paper is an improvement to current migration technique and theory, and establishes a solid theoretical base of mathematical physics for the migration of reflection seismic data. The migration results from the new methods have correct phase, accurate position and improved resolution.

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True Amplitude Seismic Migration Operator in 3‐D Heterogeneous Media

Cited by 5 publications

References 13 publications

Seismic Imaging Under the Irregular Deep Water Bottom

Seismic Imaging Under the Irregular Deep Water Bottom

AVO inversion based on common shot migration

Re‐Exploration into Migration of Seismic Data

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