engleski

Cretaceous source rocks of the Adriatic offshore

Cretaceous source rock sequences with good generating potential were determined in the central part of the Adiratic offshore. Layers of micritic limestone and bituminous laminated limestone contain mixtures of oil prone, Types I and II, high sulfur kerogen. All the maturity parameters indicate immature to marginally mature stage of thermal transformation, resulting from extremely low geothermal gradients in the area coupled with the observed burial history. In addition to oil, biogenic gases with a predominance of inorganic compounds (CO2 and H2S) were recovered from the Cretaceous carbonates. The results of oil and gas analyses define the depositional environment during source rock accumulation and the subsequent thermal conditions.

Source rock; Kerogen type; Organic facies; Maturity parameters; Oil; Bitumen; Biological markers

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