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Atypical igneous-sedimentary petroleum systems of the Parnaíba Basin, Brazil: seismic, well logs and cores

By
Frederico S. de Miranda
Frederico S. de Miranda
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Ana Luiza Vettorazzi
Ana Luiza Vettorazzi
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Paulo R. da Cruz Cunha
Paulo R. da Cruz Cunha
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Fernando B. Aragão
Fernando B. Aragão
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Diogo Michelon
Diogo Michelon
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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João Luiz Caldeira
João Luiz Caldeira
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Ernani Porsche
Ernani Porsche
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Celso Martins
Celso Martins
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Roberto B. Ribeiro
Roberto B. Ribeiro
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Alexandre F. Vilela
Alexandre F. Vilela
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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José R. Corrêa
José R. Corrêa
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Lilian S. Silveira
Lilian S. Silveira
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Kátia Andreola
Kátia Andreola
ENEVA S.A. Rio de Janeiro, RJ, Brazil
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Published:
January 01, 2018

Abstract

The Paleozoic Parnaíba Basin has proven to be one of the most successful onshore gas basins in Brazil. Since 2010, seven gas fields have been declared as commercial. Conventional gas accumulations occur in the Devonian Cabeças Formation sandstone, Upper Devonian/Lower Carboniferous heterolitic sandstones of the Longá Formation, Carboniferous Poti Formation arkosic-sandstones and in the Upper Carboniferous Piauí Formation sandstones. The stacked geometry of an extensive Mesozoic igneous complex is responsible for the creation of several four-way structures and compartmentalization of both source rock and reservoirs. The dolerite sills intrude the organic-rich intervals of the Devonian Pimenteiras shale, triggering maturity and hydrocarbon generation, thus creating an atypical igneous–sedimentary petroleum system. Major seismic concerns are the complexity of imaging subigneous plays, the large areal extent of the basin, strong velocity heterogeneity and the difficulty of imaging high-angle or vertical sealing structures, critical to prospect success. The recognition and understanding of this atypical igneous–sedimentary petroleum system could be used to unlock the potential of analogue basins worldwide and also to expand the exploration successful cases in the Parnaíba Basin itself.

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Contents

Cratonic Basin Formation: A Case Study of the Parnaíba Basin of Brazil
CONTAINS OPEN ACCESS

M. C. Daly
M. C. Daly
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R. A. Fuck
R. A. Fuck
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J. Julià
J. Julià
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D.I.M. MacDonald
D.I.M. MacDonald
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A. B. Watts
A. B. Watts
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Geological Society of London
Volume
472
ISBN electronic:
9781786204127
Publication date:
January 01, 2018

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