Frequency scaling for angle gathers

Abstract
Angle gathers provide an extra dimension to analyze the velocity after migration. Space-shift and time shift-imaging conditions are two methods used to obtain angle gathers, but both are reasonably expensive. By scaling the time-lag axis of the time-shifted images, the computational cost of the time shift imaging condition can be considerably reduced. In imaging and more so Full waveform inversion, frequencydomain Helmholtz solvers are used more often to solve for the wavefields than conventional time domain extrapolators. In such cases, we do not need to extend the image, instead we scale the frequency axis of the frequency domain image to obtain the angle gathers more efficiently. Application on synthetic data demonstrate such features.

Citation
Zuberi, M. A. H., & Alkhalifah, T. (2014). Frequency Scaling for Angle Gathers. Proceedings 76th EAGE Conference and Exhibition 2014. doi:10.3997/2214-4609.20141495

Publisher
EAGE Publications

Journal
Proceedings 76th EAGE Conference and Exhibition 2014

Conference/Event Name
76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014

DOI
10.3997/2214-4609.20141495

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