Amplitude-preserving migration by weighted diffraction stacks

Joerg Schleicher; Eduardo Filpo Ferreira da Silva; Christian Hanitzsch; Martin Tygel; Peter Hubral

doi:10.1117/12.164830

1 December 1993 Amplitude-preserving migration by weighted diffraction stacks

Joerg Schleicher, Eduardo Filpo Ferreira da Silva, Christian Hanitzsch, Martin Tygel, Peter Hubral

Proceedings Volume 2033, Mathematical Methods in Geophysical Imaging; (1993) https://doi.org/10.1117/12.164830
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

An amplitude-preserving migration aims at imaging compressional primary (zero- or) nonzero- offset reflections into 3D time or depth-migrated reflections so that the migrated wavefield amplitudes are a measure of angle-dependent reflection coefficients. The principal issue in this attempt is the removal of the geometrical-spreading factor of the primary reflections. Using a 3D Kirchhoff-type prestack migration approach, also often called a diffraction-stack migration, where the primary reflections of the wavefields to be imaged are a priori described by the zero-order ray approximation, the aim of removing the geometrical-spreading loss is achieved by weighting the data before stacking them. Different weight functions can be applied that are independent of the unknown reflector. The true-amplitude weight function directly removes the spreading loss during migration. It also correctly accounts for the recovery of the source pulse in the migrated image irrespective of the employed source- receiver configurations and the caustics occurring in the wavefield.

Citation Download Citation

Joerg Schleicher, Eduardo Filpo Ferreira da Silva, Christian Hanitzsch, Martin Tygel, and Peter Hubral "Amplitude-preserving migration by weighted diffraction stacks", Proc. SPIE 2033, Mathematical Methods in Geophysical Imaging, (1 December 1993); https://doi.org/10.1117/12.164830

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