The authors reconstructed models of parameters that calibrate petroleum systems of folded and thrust tectonic covers in the Outer Carpathians: subsidence histories, paleothermal parameters and initial hydrocarbon source potential of flysch series in 367 synthetic sections located along five regional traverses which image the subsurface geologic structure in the transfrontier zone of the Polish and Ukrainian Carpathians. In the synthetic sections, the degree of organic-matter thermal transformation and the expulsion efficiency factor were modeled. Two-dimensional expulsion models, obtained through geometrical interpolation of the expulsion efficiency factor, document prospective zones for hydrocarbon exploration in structural-facial units that form the study area.
(Wydawnictwa AGH, 2009) Kosakowski, Paweł; Więcław, Dariusz; Kotarba, Maciej
Potential source rock horizons of the flysch cover were geochemically characterized in the eastern border area of the Polish flysch Carpathians: Lower Cretaceous Verovice, Lgota and Spas Beds, Upper Cretaceous Istebna and Inoceramian Beds as well as Oligocene Menilite Beds. The results of geochemical analyses of 875 rock samples collected from 11 boreholes and 48 outcrops in the Polish Outer Carpathians as well as from the adjacent Ukrainian were analyzed. The results indicate that Menilite Beds are the best source rocks of the Carpathian flysch cover in all analyzed tectonic units. The oil-prone Type II kerogen, deposited in marine environment of regular salinity, was proved to be usually immature or mature at an early stage of »oil window«. Kinetic parameters of organic matter dispersed in the Menilite Beds, calculated based on organic sulphur content, are similar for the Silesian and Skole units and significantly lower in the Boryslav-Pokuttya Unit. The remaining lithostratigraphic divisions: Verovice, Lgota, Spas, Istebna and Inoceramian Beds, locally meet the source-rock requirements and can supplement the hydrocarbon balance of the Carpathians.
