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This paper will present a methodology to analyze the 3D seismic velocity behavior with well data support, and the misfit of these velocity curves from a normal compaction velocity trend. In this work was used five wells and one 3D survey from the Potiguar Basin. The methodology involves extracting the best velocity trends from seismic and well data and other correlation functions before removing the trend to obtain the residuals. As a result, the application has proved to be able of to separate low velocity zones associated to gas anomalies from lithological anomalies and/or velocity artefacts.

Case Study - Seismic Velocity Anomalies Analysis for Gas Detection in Potiguar Basin