Lithological and geochemical criteria and prospects for oil and gas potential of Ordovician-Silurian deposits in the northern part of the Tunguska Syneclise
UDC: 551.733.1/.3:553.98(571.51)
DOI: -
Authors:
RYASNOY A.A.
1
1 All-Russian Geological Research Institute of A.P. Karpinsky, St. Petersburg, Russia
Keywords: reservoir properties, dolomitization, catagenesis, graptolitic shales, organic geochemistry, Ordovician and Silurian systems, petroleum prospects, Tunguska Syneclise
Annotation:
The studies are devoted to the petrographic composition, reservoir and oil-and-gas source properties of Ordovician-Silurian deposits of the largest, but poorly studied supra-order structure of the Siberian Platform – the Tunguska Synclise. The relevance of the study is caused by the need to assess the oil-and-gas potential of the Tunguska Basin and to increase the resource base in East Siberia based on the identification at the present-day methodological level of prerequisites for oil and gas exploration, contributing to a scientifically substantiated prediction of oil-and-gas occurrence in this region. The degree of formation of reservoir rocks and fluid seals, the occurrence and ontogenetic state of hydrocarbon-generating substance were determined and classified according to their quality. A structural plan and a catagenesis map were compiled, the Ordovician-Silurian deposits of the syneclise area were differentiated according to categories of oil-and-gas potential.
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