The Parnaíba Basin is a Paleozoic intracratonic basin situated in the western region of
Northeastern Brazil, located between large folding ranges where sediments are deposited from
the Ordovician to the Tertiary, with magmatic events in the Mesozoic. This basin is in a
preliminary exploratory stage with evidence that it has the basic conditions for the occurrence
of hydrocarbon accumulations. This work shows the results of 2D seismic interpretation of
seismic lines 0295-0001, 0295-0002, 0295-0003, 0295-0004, 0295-0005, 0295-0006, 0295-
0007, 0295-0008 and 0295-0009. The nine seismic lines constitute a project of the National
Agency of Petroleum, Natural Gas and Biofuels (ANP), which aims to estimate the oil
potential of the Parnaíba Basin. The seismic interpretation was based on the interpretation of
the composite log of a well, made from the well-to-seismic calibration and geological map of
the area. It was performed a correlation between the data from the well log profiles with the
reflectors observed in the seismic sections. In total, ten reflectors were identified, from the top
of the Piauí Formation to the Basement. By mapping the reflectors, it can be viewed that some
regions indicate to be depocenters in Lines 0295-0006, 0295-0007 and 0295-0008, related to
the Transbrasilian Lineament, which is the main regional lineament in Parnaíba Basin. To
perform the interpretation and intersection of reflectors identified, the software GOCAD
(Geological Object Computer Aided Design) was used that allowed the 3D visualization of
the nine seismic lines with their sizes and positions.
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