3D Prestack Fourier Mixed-Domain (FMD) depth migration for VTI media with large lateral contrasts

0Citations
Citations of this article
5Readers
Mendeley users who have this article in their library.

Abstract

Although many 3D One-Way Wave-equation Migration (OWEM) methods exist for VTI media, most of them struggle either with the stability, the anisotropic noise or the computational cost. In this paper we present a new method based on a mixed space- and wavenumber-propagator that overcome these issues very effectively as demonstrated by the examples. The pioneering methods of phase-shift (PS) and Stolt migration in the frequency-wavenumber domain designed for laterally homogeneous media have been followed by several extensions for laterally inhomogeneous media. Referred many times to as phase-screen or generalized phase-screen methods, such extensions include as main examples of the Split-step Fourier (SSF) and the phase-shift plus interpolation (PSPI). To further refine such phase-screen techniques, we introduce a higher-order extension to SSF valid for a 3D VTI medium with large lateral contrasts in vertical velocity and anisotropy parameters. The method is denoted Fourier Mixed-Domain (FMD) prestack depth migration and can be regarded as a stable explicit algorithm. The FMD technique was tested using the 3D SEG/EAGE salt model and the 2D anisotropic Hess model with good results. Finally, FMD was applied with success to a 3D field data set from the Barents Sea including anisotropy.

Cite

CITATION STYLE

APA

Zhao, H., Gelius, L. J., Tygel, M., Harris Nilsen, E., & Kjelsrud Evensen, A. (2019). 3D Prestack Fourier Mixed-Domain (FMD) depth migration for VTI media with large lateral contrasts. Journal of Applied Geophysics, 168, 118–127. https://doi.org/10.1016/j.jappgeo.2019.06.009

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free