1887

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 its potential in eliminating multiple artifacts resulting from using a discontinuous velocity model in migration.

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/content/papers/10.3997/2214-4609.20148956
2011-05-23
2021-10-24
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20148956
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