Amplitude-preserved pre-stack time migration in 3D VTI media

Jiangjie Zhang; Jianfeng Zhang

doi:10.1071/EG11037

ISSN: 0812-3985
E-ISSN: 1834-7533

Amplitude-preserved pre-stack time migration in 3D VTI media
Authors Jiangjie Zhang^a,b and Jianfeng Zhang^a
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^a Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China. ^b Corresponding author. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 43, Issue 3, Sep 2012, p. 171 - 177
DOI: https://doi.org/10.1071/EG11037
- Received: 12 Jul 2011
- Accepted: 24 Apr 2012
- Published online: 01 Sep 2012

Abstract

[

We present a new method of amplitude-preserved pre-stack time migration in 3D vertical transversely isotropic (VTI) media. The travel time and amplitude of a wave propagating in VTI media are calculated by using one-way wave operators and the stationary-phase theory. An imaging weight from the deconvolution imaging condition is introduced to produce amplitude-preserved image gathers for hydrocarbon and fluid detection. Velocities and stacking anisotropic parameters are estimated by a semblance scanning method. A time-dependent migration aperture corresponding to the dip of subsurface structure is then obtained to balance imaging quality and imaging noises. Numerical examples demonstrate that our method is accurate, robust and easy to implement.

We present a method of amplitude-preserved pre-stack time migration in 3D VTI media. An imaging weight and the estimation of stacking anisotropic parameters are introduced to produce amplitude-preserved image gathers. The time-dependent migration aperture corresponding to the dip of subsurface structure is used to balance imaging quality and imaging noises.

]

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Amplitude-preserved pre-stack time migration in 3D VTI media

Exploration Geophysics 43, 171 (2012); https://doi.org/10.1071/EG11037

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Article Type: Research Article

Keyword(s): amplitude-preserved; pre-stack time migration; time-dependent migration aperture; VTI media

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Amplitude-preserved pre-stack time migration in 3D VTI media

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