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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 |
Files in This Item:
File | Size | Format | |
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2-s2.0-85059095075.pdf | 19.28 MB | Adobe PDF | View/Open |
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