Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/106759
Type: Artigo
Title: On the estimation of local slopes
Author: Schleicher, J.
Costa, J. C.
Santos, L. T.
Novais, A.
Tygel, M.
Abstract: Conventional semblance methods can be avoided for a number of imaging tasks if local slopes can be directly extracted from prestack data, for example, by filtering schemes. Recent literature shows a revival of the idea for various purposes, such as velocity analysis, tau-p imaging, migration to zero offset and time migration. Here, we discuss several different ways of extracting the desired slope information from the data. We propose a simple, straightforward correction to linear plane-wave destructors. The correction is based on the observation that additionally to the local slope, also its inverse can be extracted from the data in a fully analogous way. Combining the information of both extractions yields a simple but powerful correction to the local slopes. In our numerical examples, the naive application of simple linear plane-wave destructors with our simple, straightforward correction produced results of high quality, even in an example with a rather high noise level and interfering events.
Conventional semblance methods can be avoided for a number of imaging tasks if local slopes can be directly extracted from prestack data, for example, by filtering schemes. Recent literature shows a revival of the idea for various purposes, such as veloci
Subject: Ondas elásticas
Geofísica
Método sísmico de reflexão
Propagação de ondas
Country: Estados Unidos
Editor: Society of Exploration Geophysicists
Citation: Seg Technical Program Expanded Abstracts. , v. 27, n. 1, p. 2998 - 3002, 2008.
Rights: fechado
Fechado
Identifier DOI: 10.1190/1.3119563
Address: https://pubs.geoscienceworld.org/geophysics/article/74/4/P25/287551/
Date Issue: 2009
Appears in Collections:IMECC - Artigos e Outros Documentos

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