This report describes a case history in a densely drilled, but spatially restricted, area (47 km2) containing 240 wells in the Mioceno Norte Area of Lake Maracaibo, Venezuela. There, by means of seismic sedimentology, we extended a genetic-stratigraphic-unit-level (15 to 50 m) facies interpretation to a larger, sparsely drilled 3-D survey area (300 km2).