Lucena, Liacir dos SantosAmorim, Felipe Zumba2014-12-172011-01-102014-12-172010-10-23AMORIM, Felipe Zumba. Atenuação de ruídos coerentes utilizando decomposição em modos empíricos. 2010. 81 f. Dissertação (Mestrado em Pesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo) - Universidade Federal do Rio Grande do Norte, Natal, 2010.https://repositorio.ufrn.br/jspui/handle/123456789/12925The seismic processing technique has the main objective to provide adequate picture of geological structures from subsurface of sedimentary basins. Among the key steps of this process is the enhancement of seismic reflections by filtering unwanted signals, called seismic noise, the improvement of signals of interest and the application of imaging procedures. The seismic noise may appear random or coherent. This dissertation will present a technique to attenuate coherent noise, such as ground roll and multiple reflections, based on Empirical Mode Decomposition method. This method will be applied to decompose the seismic trace into Intrinsic Mode Functions. These functions have the properties of being symmetric, with local mean equals zero and the same number of zero-crossing and extremes. The developed technique was tested on synthetic and real data, and the results were considered encouragingapplication/pdfAcesso AbertoAtenuação de ruídos coerentesDecomposição em modos empíricosProcessamento sísmicoCoherent noise attenuationEmpirical mode decompositionSeismic processingmasterThesisCNPQ::ENGENHARIAS