STRETCH FREE TRACE PROCESSING USING BLOCK MOVE SUM AND PHASE-BASED MOVE OUT CORRECTED DATA

摘要

The present invention is directed to generating moveout data for a gather with reduced or substantially eliminated stretch and with improved resolution of potentially overlapping events. In one embodiment, a zero offset trace is obtained and a phase information for the zero offset trace is substituted into phase information for each of the offset traces to perform a phase-based moveout. The zero offset trace may be obtained by a block move sum process and that process may be enhanced for improved resolution of overlapping events. The phase moveout data may be used for analysis of offset dependent relationships such as AVO. Additionally, the phase offset data may be stacked to obtain high signal to noise ratio data for further seismic analysis.