Supressão do ruído de rolamento superficial utilizando a transformada Curvelet

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Among the many types of noise observed in seismic land acquisition there is one produced by surface waves called Ground Roll that is a particular type of Rayleigh wave which characteristics are high amplitude, low frequency and low velocity (generating a cone with high dip). Ground roll contaminates the relevant signals and can mask the relevant information, carried by waves scattered in deeper regions of the geological layers. In this thesis, we will present a method that attenuates the ground roll. The technique consists in to decompose the seismogram in a basis of curvelet functions that are localized in time, in frequency, and also, incorporate an angular orientation. These characteristics allow to construct a curvelet filter that takes in consideration the localization of denoise in scales, times and angles in the seismogram. The method was tested with real data and the results were very good

ASSUNTO(S)

atenuação do ruído de rolamento superficial, ground roll, transformada curvelet, processamento sísmico, ondas de rayleigh rayleigh wave curvelet transform petroleo e petroquimica seismic processing ground roll attenuation

ACESSO AO ARTIGO

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