Applied Geophysics

, Volume 14, Issue 4, pp 505–516 | Cite as

Reverse-time migration and amplitude correction in the angle-domain based on Poynting vector

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Abstract

We propose a method based on the Poynting vector that combines angle-domain imaging and image amplitude correction to overcome the shortcomings of reverse-time migration that cannot handle different angles during wave propagation. First, the local image matrix (LIM) and local illumination matrix are constructed, and the wavefield propagation directions are decomposed. The angle-domain imaging conditions are established in the local imaging matrix to remove low-wavenumber artifacts. Next, the angle-domain common image gathers are extracted and the dip angle is calculated, and the amplitude-corrected factors in the dip angle domain are calculated. The partial images are corrected by factors corresponding to the different angles and then are superimposed to perform the amplitude correction of the final image. Angle-domain imaging based on the Poynting vector improves the computation efficiency compared with local plane-wave decomposition. Finally, numerical simulations based on the SEG/EAGE velocity model are used to validate the proposed method.

Keywords

Poynting vector angle-domain imaging local image matrix illumination analysis amplitude correction 

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Copyright information

© Editorial Office of Applied Geophysics and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.School of Electric and Automation engineeringChangshu Institute of TechnologyChangshuChina
  2. 2.Institute for Geophysics and Planetary PhysicsUniversity of California at Santa CruzSanta CruzUSA
  3. 3.College of Earth Science and EngineeringSUN YAT-SEN UniversityGuangzhouChina

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