Automatic traveltime picking using local time-frequency maps

Abstract
The arrival times of distinct and sufficiently concentrated signals can be computed using Fourier transforms. In real seis- mograms, however, signals are far from distinct. We use local time-frequency maps of the seismograms and its frequency derivatives to obtain frequency-dependent (instantaneous) traveltimes. A smooth division is utilized to control the resolution of the instantaneous traveltimes to allow for a trade-off between resolution and stability. We average these traveltimes over the frequency band which is data-dependent. The resulting traveltime attribute is used to isolate different signals in seismic traces. We demonstrate the effectiveness of this automatic method for picking arrivals by applying it on synthetic and real data. © 2011 Society of Exploration Geophysicists.

Citation
Saragiotis, C., Alkhalifah, T., & Fomel, S. (2011). Automatic traveltime picking using local time-frequency maps. SEG Technical Program Expanded Abstracts 2011. doi:10.1190/1.3627520

Publisher
Society of Exploration Geophysicists

Journal
SEG Technical Program Expanded Abstracts 2011

DOI
10.1190/1.3627520

Permanent link to this record