Abstract
Motivated by the ideas of automatic common-midpoint (CMP) stacking without normal-moveout (NMO) correction, hence NMO stretch, and automatizing the velocity model building, we propose a cross-correlation/cross-coherence-based approach. It is a two-step method where the first step is cross-correlation/cross-coherence of zero-offset traces with all other traces in corresponding CMP gathers. This step removes the NMO effect of different hyperbolic events, resulting in CMP gathers with flat events without any stretching effect. Following this, horizontal summation across different CMP gathers is done, resulting in a velocity-free data-driven production of time-domain stacked seismic section. The second step takes advantage of the cross-correlation lags via data-driven k-means cluster analysis to separate lags corresponding to individual hyperbolic events in the CMP gather into distinct clusters. Different norm fittings to lags within individual clusters are evaluated and the lowest residual one automatically selected, resulting in a velocity and zero-offset two-way traveltime time per cluster. These form a base to build an average velocity model for migration and time-to-depth conversion. We demonstrate the efficiency of the proposed method using synthetic and field shear-wave data acquired in southwestern Sweden.
Original language | English |
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Title of host publication | 28th European Meeting of Environmental and Engineering Geophysics |
Number of pages | 5 |
ISBN (Electronic) | 9789462824256 |
DOIs | |
Publication status | Published - 2022 |
Event | 28th European Meeting of Environmental and Engineering Geophysics - Belgrade, Serbia Duration: 18 Sept 2022 → 22 Sept 2022 Conference number: 28 |
Conference
Conference | 28th European Meeting of Environmental and Engineering Geophysics |
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Abbreviated title | NSG 2022 |
Country/Territory | Serbia |
City | Belgrade |
Period | 18/09/22 → 22/09/22 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.