Detalhamento sismoestratigráfico dos reservatórios turbidíticos do Campo de Marlim, Bacia de Campos

Abstract

This work aimed to use 3D seismic data of Marlim Field, Campos Basin, applied to reservoir identification. The seismic interval between Marlim reservoirs base and Azul Marker, was detailed for a better understanding of the reservoirs geometry and their spatial distribution, as the relationship of them. For this time range, defined by local wells data, was applied seismic attribute techniques of similarity, instantaneous frequency and spectral decomposition. This procedure indeed increased the seismic data and revealed reservoir details that, otherwise, would disguised by effects like tunning, for example. A differential of this work was the CWT (Continuous Wavelet Transform) spectral decomposition application, because its natural window adjust for geologic signals, kind of data that require more resolution. The classic use of FFT spectral decomposition (more specifically, in STFT - Short Time Fourier Transform), was denied here due the susceptibility that causes in the results, once it is liable to the adjust error in search window. The resulted maps, before the seismic attributes application, was highly satisfactory, enlightening lineaments and deposition surfaces, more accurate and clear than in the traditional amplitude maps, allowing a fine stratigraphic detailing that showed different depositional phases and flow directions