TT transform attributes enhance seismic interpretation: a case of thin turbidites reservoirs in the Santos Basin, offshore Brazil

The seismic interpretation of very thin to thin turbiditic sandstones, particularly when intercalated with siltstones and shales, presents challenges, complicating the exploration and production of hydrocarbons. One of the most significant issues in this environment arises from seismic resolution, which typically cannot resolve thicknesses below 10–20 m. This was observed in the post-salt section of the Brazilian offshore basins. To address this challenge, we improved the seismic resolution by applying the time–time (TT) transform and combining local frequency, phase and magnitude components. Compared to conventional seismic attributes, the attributes derived from the TT transform allowed us to identify depositional turbiditic elements within the turbidite system as outlined in the literature and used as a conceptual model. By adopting this combination, we developed reliable architectural models that correlated well with wellbore information. From these outputs, it is feasible to build robust geological models that provide enhanced information for better project decision-making, enabling project specialists to manage inherent uncertainty and increase profitability.