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Distribution and Origin of Hydrocarbons in Carbonate Rocks (Precambrian to Triassic) in China

By
Fu Jia Mo
Fu Jia Mo
Institute of Geochemistry, Academia Sinica, Guiyang, China
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Liu De Han
Liu De Han
Institute of Geochemistry, Academia Sinica, Guiyang, China
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Jia Rong Fen
Jia Rong Fen
Institute of Geochemistry, Academia Sinica, Guiyang, China
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Dai Yong Ding
Dai Yong Ding
Institute of Geology, Academia Sinica, Beijing, China
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Published:
January 01, 1984

Abstract

Carbonate rocks range in age from Sinian (upper Proterozoic) to Triassic and are widely distributed in China. In the northern, southwestern, and southeastern parts of eastern China, these rocks contain abundant oil seeps and disseminated asphaltic substances. Large gas and small oil accumulations also have been discovered in these strata. Geologic and geochemical evidence suggests that the carbonate rocks are at least partially the source of these petroleum accumulations.

In the eastern part of China, hydrocarbons in carbonate rocks have generally undergone heating to high levels and have reached a much higher stage of thermochemical evolution. A late-stage evolution profile has been set up for evaluating hydrocarbon prospects in carbonate-rock formations. Although solid asphalts and kerogen exhibit a high degree of maturity at some places, commercial quantities of natural gas have been generated and preserved in subsurface reservoir rocks.

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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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