Περίληψη | Conditions favoring generation, migration and trapping of hydrocarbons generated
economically significant reservoirs in Prinos-Kavala Basin. Prinos oil field and
South Kavala gas field are characteristic examples. The submarine fan packed the
basin during Upper Miocene. The hydrocarbons were accumulated in turbidites, deposited
in a strongly reducing environment, with high sulfur concentration. Evaporates
are also deposited before and after the turbidite system.
In this study, which is part of a doctorate thesis, extracts retrieved from cored samples
of two satellite formations in Prinos-Kavala Basin, Epsilon and Kalirahi, selected
at the “Prinos equivalent” formations, have been analyzed, using geochemical
methods, and found to exhibit common compositional characteristics. The analysis
of biomarkers indicates that the bitumens are immature and non-biodegraded,
while their origin is considered mainly algal, with minor terrestrial contribution.
Variations on characteristic geochemical ratios between formations, such as Pr/Ph,
Ts/Tm, oleanane/hopane and steranes index, are attributed to differences on the type
of organic mater input, or the depositional setting of sediments. The identification of
the organic matter type, the hydrocarbons generation, migration paths and traps of
each structure within the basin is vital for the evaluation of a reliable model of the
basin and further hydrocarbon exploration in North Aegean basins. | en |