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Anti-aliasing Filter for Reverse-time MigrationNormal access

Authors: G. Zhan and G. T. Schuster
Event name: 74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Session: Depth Migration
Publication date: 04 June 2012
DOI: 10.3997/2214-4609.20148621
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 520.41Kb )
Price: € 20

We develop an anti-aliasing filter for reverse-time migration (RTM). It is similar to the traditional anti-aliasing filter used for Kirchhoff migration in that it low-pass filters the migration operator so that the dominant wavelength in the operator is greater than two times the trace sampling interval, except it is applied to both primary and multiple reflection events. Instead of applying this filter to the data in the traditional RTM operation, we apply the anti-aliasing filter to the generalized diffraction-stack migration operator. This gives the same migration image as computed by anti-aliased RTM.

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