New insights into the Parnaíba Basin: results of investments by the Brazilian National Petroleum Agency
Marina Abelha, Eliane Petersohn, Gabriel Bastos, Daniel Araújo, 2018. "New insights into the Parnaíba Basin: results of investments by the Brazilian National Petroleum Agency", Cratonic Basin Formation: A Case Study of the Parnaíba Basin of Brazil, M. C. Daly, R. A. Fuck, J. Julià, D.I.M. MacDonald, A. B. Watts
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The Parnaíba Basin is a Paleozoic cratonic basin located in NE Brazil. Despite exploration in the Parnaíba Basin having undergone a long period of stagnation, it is now one of the most prolific natural gas producing basins in Brazil. Production from this basin is c. 5.6 million m3 day−1 from three established gas fields, with another four fields in development and eight ongoing discovery assessment plans (in January 2017). This success is the result of activity on exploration concessions, both the investments of the Brazilian National Petroleum Agency (ANP) and concessionaires operating in the basin. ANP’s investments were decisive in the definition of the offered areas in the bid rounds and, more importantly, in our understanding of the structural and stratigraphic framework through systematic data acquisition, which helped to define an exploration model for the basin. The Parnaíba Basin received investments of c. US $100 million from ANP and the preliminary results from projects located in the SE of the basin suggest the need for a new exploration model for this area, which was probably affected by the Trans Brazilian Lineament. In this model, the petroleum system would include Ordovician–Silurian components.
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Cratonic Basin Formation: A Case Study of the Parnaíba Basin of Brazil
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Cratonic basins are large, distinctive features of the continental crust. They are preferentially developed on thick continental lithosphere, are typically sub-circular in shape and subside over periods of hundreds of millions of years. They are also endowed with significant resources. However, in spite of their location in continental interiors and often well-known geology, the subsidence driving mechanism and tectonic setting of these basins remains controversial.
This volume presents both lithospheric and basin scale datasets acquired specifically to interrogate the tectonic process of cratonic basin formation. Focused on the Silurian to Triassic Parnaíba cratonic basin of Brazil, the papers discuss the results of a multidisciplinary basin analysis project comprising new geophysical, geological and geochemical data. This unique dataset enables the characterization of the lithospheric crust and mantle beneath the Parnaíba Basin, constrains the detailed evolution of the basin itself, and enables comparisons with cratonic basins globally. Several convergent themes emerge providing new and powerful constraints for models of the driving mechanisms of these enigmatic basins.