3D view of Interpreted time-migrated composite of crooked seismic lines crossed by the well PTRA-5. The well was drilled on a basement high connected by faults to H₂-rich layers (lenticular polygon in yellow). Additional legend: Archean/Paleoproterozoic basement surface in red, Sete Lagoas Formation surface in yellow. Black lines correspond to faults. The lenticular polygon in yellow is indicative of layers with H₂ but does not represent the real thickness and size of these occurrences. Seismic lines 0319-0448, 0319-0449, and 0319-0451 from the 2D seismic survey 0319_PETRA_BSF_VIBRO2D_2010.