Converted-wave seismic imaging: Amplitude-balancing source-independent imaging conditions

Malcolm, Alison and Shabelansky, Andrey H. and Fehler, Mike (2017) Converted-wave seismic imaging: Amplitude-balancing source-independent imaging conditions. Geophysics, 82 (2). S99-S109. ISSN 1942-2156

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Abstract

We have developed crosscorrelational and deconvolutional forms of a source-independent converted-wave imaging condition (SICW-IC) and show the relationship between them using a concept of conversion ratio coefficient, a concept that we developed through reflection, transmission, and conversion coefficients. We applied the SICW-ICs to a two half-space model and the synthetic Marmousi I and II models and show the sensitivity of the SICW-ICs to incorrect wave speed models. We also compare the SICW-ICs and source-dependent elastic reverse time migration. The results of SICW-ICs highlight the improvements in spatial resolution and amplitude balancing with the deconvolutional forms. This is an attractive alternative to active and passive source elastic imaging.

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