Common offset pseudo‐screen depth migration

Jin, Shengwen; Wu, Ru hyphen; Shan, Shan

doi:10.1190/1.1820809

Cited by 13 publications

(12 citation statements)

References 8 publications

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“…When N is large in the 3-D case, the dual-domain methods are not necessarily slower than the ray methods. Further, the dual-domain methods can be formulated in the midpoint-offset coordinate system without difficulty (JIN and WU, 1999b), while a finite difference solution for this system has not been found. For marine data, the number of offsets is considerably smaller than the number of sources; thus there is a gain in efficiency when using an offset-domain migration formulation with dual-domain propagators.…”

Section: Features Of Dual-domain Propagators (Ddp)mentioning

confidence: 99%

Wave Propagation, Scattering and Imaging Using Dual-domain One-way and One-return Propagators

Wu¹

2003

Pure appl. geophys.

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Dual-domain one-way propagators implement wave propagation in heterogeneous media in mixed domains (space-wavenumber domains). One-way propagators neglect wave reverberations between heterogeneities but correctly handle the forward multiple-scattering including focusing/defocusing, diffraction, refraction and interference of waves. The algorithm shuttles between space-domain and wavenumber-domain using FFT, and the operations in the two domains are self-adaptive to the complexity of the media. The method makes the best use of the operations in each domain, resulting in efficient and accurate propagators. Due to recent progress, new versions of dual-domain methods overcame some limitations of the classical dual-domain methods (phase-screen or split-step Fourier methods) and can propagate large-angle waves quite accurately in media with strong velocity contrasts. These methods can deliver superior image quality (high resolution/high fidelity) for complex subsurface structures. One-way and one-return (De Wolf approximation) propagators can be also applied to wave-field modeling and simulations for some geophysical problems. In the article, a historical review and theoretical analysis of the Born, Rytov, and De Wolf approximations are given. A review on classical phase-screen or split-step Fourier methods is also given, followed by a summary and analysis of the new dual-domain propagators. The applications of the new propagators to seismic imaging and modeling are reviewed with several examples. For seismic imaging, the advantages and limitations of the traditional Kirchhoff migration and time-space domain finite-difference migration, when applied to 3-D complicated structures, are first analyzed. Then the special features, and applications of the new dual-domain methods are presented. Three versions of GSP (generalized screen propagators), the hybrid pseudo-screen, the wide-angle Pade´-screen, and the higherorder generalized screen propagators are discussed. Recent progress also makes it possible to use the dualdomain propagators for modeling elastic reflections for complex structures and long-range propagations of crustal guided waves. Examples of 2-D and 3-D imaging and modeling using GSP methods are given.

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Section: Features Of Dual-domain Propagators (Ddp)mentioning

confidence: 99%

Wave Propagation, Scattering and Imaging Using Dual-domain One-way and One-return Propagators

Wu¹

2003

Pure appl. geophys.

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“…One square root is to continuate the source, the other is to continuate the receiver. The propagator can be solved by the hybrid domain methods [4,5,8] or the finite-difference scheme presented by Zhang et al [20] . In addition, the wavefield continuation can be implemented in the source-offset domain too [21,22] .…”

Section: Dsr Equation Wave Propagatorsmentioning

confidence: 99%

“…DSR equation is generally applied to prestack time migration [2,3] . In the middle of the 1990s, DSR equation prestack depth migration methods were developed by using some hybrid domain wave propagators [4,5] .…”

Section: Introductionmentioning

confidence: 99%

Double Square Root Equation Migration Methods of Narrow Azimuth Seismic Data

Cheng¹,

Wang²,

Ma³

2005

Chinese J. Geophys.

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After reviewing the basic principle of the migration methods based on the double square root (DSR) equation, we introduce a fast algorithm of angle domain imaging to facilitate migration velocity analysis (MVA). Then we discuss two approaches to migrate the narrow azimuth seismic data. One has restriction to the input data set, the other has limitation of the wave propagation direction. The numerical tests show that the DSR equation prestack depth migration methods, such as common azimuth migration, have a promising prospect of application in areas with strong lateral variations of velocity where bsalt, reef or burred hills exist.

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“…During wavefields continuation, split-step Fourier, Fourier finite-difference, local Born or Rytov approximation or generalized screen propagators can be applied to solving Eq. (1a) (Popovici, 1996;Jin and Wu, 1999). According to Cheng et al (2003a), DSR one-way wave equation prestack depth migration utilizes the zero-time zero-offset imaging condition (Yilmaz, 1979;Claerbout, 1985), namely…”

Section: Introductionmentioning

confidence: 99%

Methods and applications of 3-D wave equation common-azimuth prestack migration

Cheng

Wang

Geng

et al. 2007

Front. Earth Sci. China

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To tackle the difficulties of a 3-D full volume prestack migration based on the double-square-root (DSR) one-way wave equation in practical applications, the common-azimuth migration approach is first discussed using dual-domain wave propagators under the theoretical frame of crossline common-offset migration. Through coordinate transforming, a common-azimuth prestack tau migration technology that recursively continues the source and receiver wavefields and picks up the migrated results in the two-way vertical traveltime (tau) direction is developed. The migrations of synthetic data sets of SEG/EAGE salt model prove that our common-azimuth migration approaches are effective in both depth and tau domains. Two real data examples show the advantages of wave-theory based prestack migration methods in accuracy and imaging resolution over the conventional Kirchhoff integral methods.

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Common offset pseudo‐screen depth migration

Cited by 13 publications

References 8 publications

Wave Propagation, Scattering and Imaging Using Dual-domain One-way and One-return Propagators

Wave Propagation, Scattering and Imaging Using Dual-domain One-way and One-return Propagators

Double Square Root Equation Migration Methods of Narrow Azimuth Seismic Data

Methods and applications of 3-D wave equation common-azimuth prestack migration

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