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. This paper presents a proposal for implementing a processing flowchart for high-resolution single-channel seismic data acquired in Guanabara Bay, followed by its interpretation. Geologically, it consists of mapping the Guanabara Bay Quaternary deposits relative to the drowning of a fluvial paleochannel that resulted from recent sea level changes. So far, high-resolution seismic data have been interpreted without any signal improvement, while the development of a processing flowchart for this is hardly addressed in the literature. The parameters were selected based on the processing applied to conventional seismic prospecting for oil and gas in order to compose a less extensive and more applicable flowchart. The results confirmed the efficacy of the processing applied to shallow seismic data, with noise and multiples attenuation and better lateral continuity of reflectors in subsurface, thus increasing the quality of the final seismic record. Keywords: Processing, shallow seismic, Guanabara Bay, high-resolution seismic. RESUMO . O presente trabalho apresenta uma proposta de aplicacao de um fluxo de processamento para dados de sismica monocanal de alta resolucao adquiridos na Baia de Guanabara e, posteriormente, sua interpretacao. O objetivo geologico consiste no mapeamento dos depositos Quaternarios da Baia de Guanabara relativos ao afogamento de um paleocanal fluvial como consequencia das variacoes recentes do nivel do mar. Ate o momento os dados de sismica de alta resolucao vem sendo interpretados sem a aplicacao de nenhuma melhoria e a elaboracao de um fluxo de processamento para tal e raramente abordada na literatura. Os parâmetros foram selecionados para a elaboracao do fluxo com base no processamento aplicado a sismica convencional na prospeccao de hidrocarbonetos de forma a compor um fluxo mais sucinto e aplicavel. Os resultados obtidos nos perfis analisados comprovaram a eficacia do processamento de dados de sismica rasa, com a atenuacao de ruidos, das multiplas de fundo e maior continuidade lateral dos refletores em subsuperficie, aumentando assim a qualidade do registro sismico. Palavras-chave: Processamento, sismica rasa, baia da Guanabara, alta resolucao sismica.

PROCESSING OF HIGH-RESOLUTION, SHALLOW SEISMIC PROFILES, GUANABARA BAY – RIO DE JANEIRO STATE, BRAZIL