PETROLEUM PROCESSES IN THE PALAEOZOIC-MESOZOIC STRATA OF THE GROBLA-LIMANOWA AREA (BASEMENT OF THE POLISH CARPATHIANS)
Journal Title: Geology, Geophysics & Environment - Year 2016, Vol 42, Issue 2
Abstract
The geochemical characteristics of the Palaeozoic and Mesozoic strata of the basement of the Carpathian Foredeep determined the Devonian and Carboniferous source rocks as the best source for hydrocarbons generation. Moreover, the Outer Carpathian sequence was geochemically characterized and it occurred capable of generating hydrocarbons. The oil-source rocks correlations indicated that the source of the condensate accumulated in the Łąkta field and oil in Grobla field. The maturity modelling identifies that Devonian source rocks reached a late phase of “oil window” and locally even ”gas window”. The Carboniferous source rock was mature enough to start the generation processes. The generation started in the late Carboniferous, both in Upper Silesian and Małopolska blocks. The main phase of the petroleum processes took place in late Neogene. The expulsion was observed only in the Devonian source rocks, and vertical migration by fault system in both blocks resulted in oil and gas accumulation in the Upper Jurassic carbonates and Upper Cretaceous sandstones. The petroleum modelling indicated the Devonian source for oil and gas fields in the study area; however oil-source rock correlation also suggests the presence of the Carpathian flysch source for hydrocarbons accumulated in the Łąkta field.
Authors and Affiliations
M. Wróbel, P. Kosakowski, D. Więcław
Keywords
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- EP ID EP204327
- DOI 10.7494/geol.2016.42.2.185
- Views 51
- Downloads 0
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