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Book Chapter

South Florida Basin—A Prime Example of Carbonate Source Rocks of Petroleum

By
James G. Palacas
James G. Palacas
U.S. Geological Survey, Denver Federal Center, Denver, Colorado
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Donald E. Anders
Donald E. Anders
U.S. Geological Survey, Denver Federal Center, Denver, Colorado
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J. David King
J. David King
U.S. Geological Survey, Denver Federal Center, Denver, Colorado
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Published:
January 01, 1984

Abstract

Stratigraphic, lithologic, and geochemical data provide ample evidence that carbonate rocks and not shales are the source beds of commercial oil in carbonate grainstone reservoirs of the Lower Cretaceous Sunniland Limestone of the South Florida basin.

Detailed crude-oil-source-rock correlations, including gaschromatographic–mass-spectrometric analyses of steranes, and of tricyclic and pentacyclic terpanes, indicate that the algal-sapropelic, organic-rich argillaceous limestones in the lower Sunniland Limestone, particularly the down-dip, basinal facies, are the probable major source of upper Sunniland

Conventional geochemical maturity parameters, plus biomarker isomerization ratios, indicate that the Sunniland oils and source rocks are marginally mature. The sterane ratios, commonly in conjunction with the extended hopane isomerization ratios, proved invaluable in deciphering the thermal maturity of carbonate rocks in south Florida and in pinpointing the upper threshold of the conventional oil-generation zone.

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Contents

AAPG Studies in Geology

Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks

James G. Palacas
James G. Palacas
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American Association of Petroleum Geologists
Volume
18
ISBN electronic:
9781629811642
Publication date:
January 01, 1984

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