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Regional Evaluation of Source Rock Quality in Azerbaijan from the Geochemistry of Organic-rich Rocks in Mud-volcano Ejecta

By
Gary H. Isaksen
Gary H. Isaksen
ExxonMobil Exploration Co., Houston, Texas, U.S.A.
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Adil Aliyev
Adil Aliyev
Geological Institute of Azerbaijan, Baku, Azerbaijan
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Scott A. Barboza
Scott A. Barboza
ExxonMobil Upstream Research Company, Houston, Texas, U.S.A.
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David Puls
David Puls
ExxonMobil Exploration Co., Houston, Texas, U.S.A.
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Ibrahim Guliyev
Ibrahim Guliyev
Geological Institute of Azerbaijan, Baku, Azerbaijan
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Published:
January 01, 2007

Abstract

Rock ejecta brought to the surface by mud volcanoes offer a unique opportunity to characterize sedimentary units both within and beyond conventional drilling depths. Present among ejecta from mud volcanoes in the South Caspian Basin are the organic-rich rocks of the Oligocene–Miocene Maikop Formation, the primary source rocks for oil and gas in the region. These rocks have total organic carbon contents as much as 7% wt. and hydrogen indices as much as 500 mg hydrocarbons/g organic carbon. They are dominated by marine, algal-amorphous organic matter accumulated under dysoxic to anoxic conditions. When integrated, the rock analyses can aid in the reconstruction of paleodepositional environments and paleogeography of source rock intervals and, thus, help high-grade oil and gas exploration targets.

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Contents

AAPG Studies in Geology

Oil and Gas of the Greater Caspian Area

Pinar O. Yilmaz
Pinar O. Yilmaz
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Gary H. Isaksen
Gary H. Isaksen
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American Association of Petroleum Geologists
Volume
55
ISBN electronic:
9781629810348
Publication date:
January 01, 2007

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