Regional Evaluation of Source Rock Quality in Azerbaijan from the Geochemistry of Organic-rich Rocks in Mud-volcano Ejecta
Gary H. Isaksen, Adil Aliyev, Scott A. Barboza, David Puls, Ibrahim Guliyev, 2007. "Regional Evaluation of Source Rock Quality in Azerbaijan from the Geochemistry of Organic-rich Rocks in Mud-volcano Ejecta", Oil and Gas of the Greater Caspian Area, Pinar O. Yilmaz, Gary H. Isaksen
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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.