ABSTRACT. 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.

In this work we introduce a processing flow for monochannel high resolution seismic data from Guanabara Bay. Usually high resolution seismic data is interpreted in its raw format and the development of a processing flow is rarely found in the literature. The results show the efficiency of processing, mainly in the attenuation of noise and in the greater lateral continuity of reflectors, thereby increasing the quality of the seismic image and allowing a better interpretation of the Quaternary sedimentary deposits.