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Improved Time Delay Estimation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, Jun 2008, cp-40-00339
- ISBN: 978-90-73781-53-5
Abstract
We compare cross-correlation based time delay estimation to two alternative algorithms: a time-domain least squares Taylor method and a time-domain based bi-coherence analysis. For short-window seismic analysis and uncorrelated noise the Taylor method performs best. This is demonstrated on synthetics and with a North Sea 4D data example for which we find a significant reduction in NRMS (13%) with the improved algorithm, when compared to cross-correlation time-alignment.