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Nonstationary Phase Estimation for Analysis of Wavelet Character
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, Jun 2010, cp-161-00131
- ISBN: 978-90-73781-86-3
Abstract
Phase mismatches sometimes occur between final processed seismic sections and zero-phase synthetics based on well logs – despite best efforts for controlled-phase acquisition and processing. Statistical estimation of the phase of a seismic wavelet is feasible using kurtosis maximization by constant phase rotation, even if the phase is nonstationary. After estimation, we achieve space-and-time-varying zero-phasing by phase rotation. We demonstrate how a statistical analysis provides pertinent information about the data that can be used for zero-phasing, as a quality control to check deterministic phase corrections, or even as an interpretive tool for highlighting areas of potential interest.