The Pará-Maranhão Basin has a thick carbonate platform of Tertiary age in which several important wells were drilled and recovered organic-rich sedimentary rocks from the Travosas Formation. Petroleum System Charts provide geological cross sections and updated stratigraphic chart, combined with geochemical logs and molecular data to assess light oils genetic origins to source rocks. The presence of multiple source rocks and at least three active petroleum systems can be outlined: marine anoxic, (Late Cretaceous);, marine deltaic (Tertiary), and lacustrine (Cretaceous). These data tentatively indicate that the main pods are located deep offshore and under a high mature stage of thermal evolution. Deep water regions area unexplored given that only two wells have been drilled in water depths deeper than 83 m. The Pará-Maranhão Basin has a large potential as an oil-producing province because of direct evidence of light oil recovered in wells and due to the discoveries in the counterpart basins in Africa – offshore Ghana (Tano Basin) and in the Ivory Coast.

Full references of all images are listed in the reports

1. Petroleum System Summary
2. Source Rocks Chart
   1. Albian-Cenomanian
3. Oil Chart
   1. Albian-Cenomanian
4. Reservoir Rocks Chart
   1. Tertiary
5. Oil Chart
   1. Tertiary
6. Petroleum Systems Traps and Seals
   1. Albian-Cenomanian
   2. Tertiary
7. Petroleum System Generation, Migration and Preservation
8. Conclusions and Exploration Risk