Development of methodological proceeding for seismic oceanography using legacy multi-channel seismic data of the oil and gas industry

This work presents a methodology for using legacy seismic data from oil and gas industry for low-frequency acoustic imaging (up to 200 Hz) of internal oceanic structure. The procedure to obtain these images is called seismic oceanography and is an emerging tool for a large-scale analysis of the ocean physical properties. The collection of seismic data from the oil industry is used for seismic oceanographic processing as they have both similar survey configuration requirements for their data acquisition. The dataset used to define the methodology was obtained with the Brazilian Oil Exploration Database (BDEP). The presented results use the 0247 Caravela1993 line. A robust methodology has been detailed that allows to quickly identify if the dataset could provide useful information for a deeper seismic oceanographic analysis. The processed results indicate that the seismic oceanography processing can be applied in legacy industry data and that there are significant information in the seismic line used that could contribute to physical oceanography research.