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|Title:||On the estimation of local slopes|
Costa, J. C.
Santos, L. T.
|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
Método sísmico de reflexão
Propagação de ondas
|Editor:||Society of Exploration Geophysicists|
|Citation:||Seg Technical Program Expanded Abstracts. , v. 27, n. 1, p. 2998 - 3002, 2008.|
|Appears in Collections:||IMECC - Artigos e Outros Documentos|
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