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Tectonic setting and stratigraphic architecture of an Early Cretaceous lacustrine carbonate platform, Sugar Loaf High, Santos Basin, Brazil

By
J. P. Buckley
J. P. Buckley
1
CGG, Crompton Way, Manor Royal Estate, Crawley, West Sussex, RH10 9QN, UK
2
Department Earth Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
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D. Bosence
D. Bosence
2
Department Earth Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
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C. Elders
C. Elders
2
Department Earth Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
3
Department of Applied Geology, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia
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Published:
January 01, 2015

Abstract

The Sugar Loaf High is an extensive basement structure within the Santos Basin, offshore Brazil, in which all of the elements of the pre-salt hydrocarbon play are present. Following a clastic-dominated early synrift phase, the later synrift and sag phases are characterized by an extensive non-marine carbonate platform over the basement high. The study area within this new 3D seismic dataset contains carbonates stratigraphically equivalent to the reservoirs within the Lula and Sapinhoá fields. Analysis of the 3D seismic data shows that the pre-salt carbonates onlap the basement of the Sugar Loaf High and form aggradational geometries on a platform that has a proximal to distal width of about 100 km and an interpreted relief of some 900 m. The carbonate platform has an aggradational and mounded basinward-facing gullied margin with slope deposits. Progradational units are imaged on the platform top that may be either carbonate or clastic in composition. The platform is preserved beneath evaporites that form the regional seal within the Santos Basin. Platforms of this size are previously unknown from lacustrine settings outside the pre-salt stratigraphy of the Santos and Campos Basins, Brazil.

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Contents

Geological Society, London, Special Publications

Microbial Carbonates in Space and Time: Implications for Global Exploration and Production

D. W. J. Bosence
D. W. J. Bosence
Royal Holloway, University of London, UK
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K. A. Gibbons
K. A. Gibbons
Nexen Petroleum UK Ltd, UK
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D. P. Le Heron
D. P. Le Heron
Royal Holloway, University of London, UK
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W. A. Morgan
W. A. Morgan
Morgan Geoscience Consulting, LLC, USA
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T. Pritchard
T. Pritchard
BG Group, UK
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B. A. Vining
B. A. Vining
Royal Holloway, University of London, UK
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Geological Society of London
Volume
418
ISBN electronic:
9781862397163
Publication date:
January 01, 2015

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