Prestack reverse-time depth migration of arbitrarily wide-angle wave equations

He, Bingshou; Zhang, Huixing; Zhang, Jing

doi:10.1007/s11589-008-0492-x

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…The form of AWWEs is very simple, only involving second-order partial derivatives, so it is convenient to implement numerical calculations. Due to that, AWWEs have already been tested in migration (e.g., Guddati and Heidari, 2005;He et al, 2008;Sun and Du, 2011).…”

Section: Introductionmentioning

confidence: 99%

Application of perfectly matched layer for scalar arbitrarily wide-angle wave equations

Chen

Zhou

et al. 2013

GEOPHYSICS

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Arbitrarily wide-angle wave equation (AWWE) is a space domain, high-order one-way wave equation (OWWE). Its accuracy can be arbitrarily increased, and it is amenable to easy numerical implementation. Those properties make it outstanding among the existing OWWEs and further enable it to be a desirable tool for migration. We extend the perfectly matched layer (PML) to 3D scalar AWWE to provide a good approach to suppress artifacts arising at truncation boundaries. We follow the concept of complex coordinate stretching, and the derivation procedure of PML for AWWE is straightforward. An existing finite-difference scheme is adopted to fit the split PML formulation and its stability is observed through numerical examples. The performance of the developed PML condition is compared with two different wave-equation based absorbing boundary conditions. Numerical results illustrate that the PML condition used in AWWE propagator can effectively absorb the propagating waves and evanescent waves at a price of limited additional computation cost.

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Section: Introductionmentioning

confidence: 99%

Application of perfectly matched layer for scalar arbitrarily wide-angle wave equations

Chen

Zhou

et al. 2013

GEOPHYSICS

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“…The velocity gradually increase along the horizontal coordinate. To apply the velocity analysis introduced above, the structure with crack is considered as the multi-layers structure and the crack is considered as a independent layer [14]. When the damage exist in the structure, the curve shape of function will change gradually.…”

Section: Discussionmentioning

confidence: 99%

Structural Damage Detection Based on the Wave Velocity Analysis

Guo

Hua

2012

AMR

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The wave velocity analysis is a kind of popular geophysical method. These years it is also used in structural damage identification which is discussed in this paper. This method is used to detect the interior damage of structure and is verified to recognize the damage effectively. The expression of the vertical and horizontal velocity is deduced and the wave velocity function curve is drawn according to velocity variety rule. The two dimensional and three dimensional wave field figure is drawn according to the wave velocity analysis and it shows the distinguish between the damaged and integrated structure. We can see the change of the wave shape and velocity and we can identify the damage in terms of the velocity variety rule. So the method introduced in this paper is verified to be a pontential way to identify the structural damage.

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“…Willacy and Kryvohuz (2019) tried to image steep boundaries between a salt body and surrounding sediments based on the RTM using transmitted waves. He et al (2008) developed RTM of arbitrarily wide-angle wave equations, but the imaging effect of this method is poor in shallow regions. Yoon and Marfurt (2006) introduced Poynting vector imaging conditions into RTM to realize cross-correlation of different direction wavefields, but it has a big numerical error in the regions of complex tectonics.…”

Section: Introductionmentioning

confidence: 99%

Reverse Time Migration Based on the Pseudo-Space-Domain First-Order Velocity-Stress Acoustic Wave Equation

et al. 2021

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Reverse time migration (RTM) is an ideal seismic imaging method for complex structures. However, in conventional RTM based on rectangular mesh discretization, the medium interfaces are usually distorted. Besides, reflected waves generated by the two-way wave equation can cause artifacts during imaging. To overcome these problems, a high-order finite-difference (FD) scheme and stability condition for the pseudo-space-domain first-order velocity-stress acoustic wave equation were derived, and based on the staggered-grid FD scheme, the RTM of the pseudo-space-domain acoustic wave equation was implemented. Model experiments showed that the proposed RTM of the pseudo-space-domain acoustic wave equation could systematically avoid the interface distortion problem when the velocity interfaces were considered to compute the pseudo-space-domain intervals. Moreover, this method could effectively suppress the false scattering of dipping interfaces and reflections during wavefield extrapolation, thereby reducing migration artifacts on the profile and significantly improving the quality of migration imaging.

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Prestack reverse-time depth migration of arbitrarily wide-angle wave equations

Cited by 5 publications

References 12 publications

Application of perfectly matched layer for scalar arbitrarily wide-angle wave equations

Application of perfectly matched layer for scalar arbitrarily wide-angle wave equations

Structural Damage Detection Based on the Wave Velocity Analysis

Reverse Time Migration Based on the Pseudo-Space-Domain First-Order Velocity-Stress Acoustic Wave Equation

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