Newly acquired CSEM data were integrated with several different types of complementary measurements and techniques in an exploration prospect evaluation study—which included petroleum systems modeling (PSM)—of the deepwater offshore area of the Potiguar Basin, northeast Brazil (Figure 1). Potiguar is the second most productive basin in Brazil, but to date, all production is from its onshore and nearshore areas. A 2D seismic data set was reprocessed then interpreted to provide regional scale horizons, which were used as input, along with other geological and geochemical information, for the study. The CSEM data clearly defined resistive anomalies over five features interpreted as potential traps on the seismic data. The CSEM resistivity volumes have provided added value to the PSM and prospectivity study of this basin.