Wavefield extrapolation in the pseudo-depth domain

Ma, X.; Alkhalifah, Tariq Ali

Wavefield extrapolation in the pseudo-depth domain

Type

Conference Paper

Authors

Ma, X.
Alkhalifah, Tariq Ali

KAUST Department

King Abdullah University of Science and Technology, Saudi Arabia
Earth Science and Engineering Program
Physical Science and Engineering (PSE) Division

Online Publication Date

2014-12-03

Print Publication Date

2012-06-04

Date

2011-05-23

Abstract

We introduce the pseudo-depth as an extension to vertical time representation of acoustic wavefield. By formulating the mapping relations between conventional depth and pseudo-depth, we derive an acoustic wave equation for isotropic media in the pseudo-depth domain. Because of a uniform vertical wavelength in the pseudo-depth domain, wavefield extrapolation requires less number of vertical samples to avoid aliasing. Reduction of samples implies a reduction of run time for finite-difference time extrapolation. To highlight its application potentials, we performed an exploding reflector modeling and zero-offset migration using pseudo-depth wavefield extrapolation. The results agree well with conventional vertical-depth modeling and migration. The pseudo-depth wavefield extrapolation also showed ils potential in eliminating multiple artifacts resulting from using a discontinuous velocity model in migration.

Citation

Ma, X., & Alkhalifah, T. (2011). Wavefield Extrapolation in the Pseudo-depth Domain. 73rd EAGE Conference and Exhibition Incorporating SPE EUROPEC 2011. doi:10.3997/2214-4609.20148956