Techniques for mapping the geometry of geological surfaces have been applied to faults mapped from 3D seismic data acquired offshore Niger Delta. The quality of the data was first improved by applying techniques that highlight faults based on the similarity of the seismic traces. Four faults were then tracked and surface models plotted using an algorithm that interpolates scattered data points at user-defined grid dimensions. The plots show that the faults exhibit a wide variety of geometries

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... aracterized by small-scale irregularities and more regular large-scale corrugations predominantly oriented along the dip direction. Although the surfaces were mapped in the time-domain, the consistent pattern of the long-wavelength corrugations suggests that the structures may not be entirely due to interpretation bias and velocity heterogeneity in Tertiary deltaic sediments. Results presented in this article highlight potential errors in subsurface structural models that assume simple and planar fault geometries.