A study of organic matter and habitat of gaseous hydrocarbons in the Miocene strata of the Polish part of the Carpathian Foredeep

• Autorzy: Kotarba M.J. , Wilczek T. , Kosakowski P. , Kowalski A. , Więcław D.
• Konferencja: Carpathian-Balkan Geological Association XVI Congres, Vienna, Austria, 30.08. - 2.09. 1998
• Języki publikacji: EN

Abstrakty

EN

Geochemical studies on the organic matter from the autochthonous Miocene strata of the Carpathian Foredeep demonstrated the presence of gas-prone type 111 kerogen in both the Upper Badenian and Lower Sarmatian sediments with rare admixtures of algal type II kerogen. The TOC contents vary from 0.02 to 3.22 wt. %. Down to the depth 3,200 meters the organic matter is immature. Its transformation degree corresponds to the vitrinite reflectance R,,from 0.25 to 0.6% and to the Rock Eval Tmax temperatures from 415 to 438" C. Insignificant variability in spatial and depth distribution of geochemical parameters and indices (TOC, TE/TOC, Tmax, HI, R<>, CPI, etc.) suggest that deposition conditions of the organic matter were generally homogenous within the full thickness of Miocene sequence down to the recent depth about 3,200 meters. Such conditions resulted in the lack of diversity of the TOC, the genetic type and the transformation degree of the studied kerogen. The Miocene terrestrial OM is immature and generated almost exclusively the microbial methane. The low-temperature thermogenic processes have been active beneath the depth about 3,200 meters i.e., mainly under the Carpathian overthrust.

Słowa kluczowe

EN

petroleum exploration; geochemical methods; stable isotopes; organic materials; kerogen; natural gas; genesis; Miocene; Carpathian Foredeep; Poland

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Przegląd Geologiczny
• Rocznik: 1998
• Tom: Vol. 46, nr 8/2
• Strony: 742--750
• Opis fizyczny: bibliogr. 23 poz., tab., wykr.

Twórcy

autor

Kotarba M.J.

autor

Wilczek T.

autor

Kosakowski P.

autor

Kowalski A.

autor

Więcław D.

• University of Mining and Metallurgy, Department of Fossil Fuels, al. Mickiewicza 30, 30-059 Kraków, Poland