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40 lat działalności geologicznej Biura Geologicznego Geonafta

Hoffmann M., Korab Z., Wilczek T.

Nafta-Gaz

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2002

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R. 58, nr 10

577-588

PL

W styczniu 1962 r. Minister Górnictwa w ramach Zjednoczenia Przemysłu Naftowego powołał Biuro Dokumentacji i Projektów Geologicznych z siedzibą w Warszawie jako centralną jednostkę geologiczną odpowiedzialną za opracowania syntetycznych materiałów dokumentujących możliwości poszukiwań złóż węglowodorów w Polsce, wieloletnich programów prac poszukiwawczych oraz projektów badań geofizycznych i wierceń poszukiwawczych na wybranych obiektach strukturalnych. W artykule przedstawiono historię rozwoju Biura oraz szeroki zakres prac geologicznych realizowanych w ciągu 40 lat działalności i ich znaczenie dla odkrycia i udokumentowania złóż ropy naftowej i gazu ziemnego w Polsce.

EN

In December 1962 Minister of Mining within a framework of the Union of Oil Industry established Bureau of Documentation and Geological Projects with headquarters in Warsaw as a central geological unit responsible for an elaboration of the synthetic geological-geophysical data documenting an opportunities of the hydrocarbons exploration in Poland, long-term exploration programs and geophysical prospecting and drilling projects on the selected structural objects. In the paper the expansion history of Bureau and wide scope of geological work realised during 40 years of the activity and their significance for discovering.

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Model of gaseous hydrocarbon generation in the Miocene strata of the Polish part of the Carpathian Foredeep

Kotarba M.J., Burzewski W., Wilczek T., Słupczyński. K., Kosakowski P., Botor D.

Przegląd Geologiczny

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1998

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Vol. 46, nr 8/2

737-742

EN

The TTI modelling demonstrated that the autochthonous Miocene strata located in the outer Miocene basin of the Carpathian Foredeep, north of the present edge of the Carpathian overthrust have generated only the microbial gas. In the part of the Miocene basin covered recently by the Carpathian overthrust the low-temperature thermogenic gases were generated down to 7,000 of meters depth. Finally, in the hypothetical zone of the Lower Miocene molasse located recently at depth interval 7,500-11,000 meters only the high-temperature thermogenic gases could be formed. Alternatively, at the site of the Lower Miocene molasse the depression filled with Upper Carboniferous coal-bearing formation may occur. Therefore, at depth beneath 7,500 meters, i.e. beneath the Carpathian overthrust the gas deposits can be expected. The maximum yield of the microbial methane generation within the autochthonous Miocene calculated for depth interval 900 to 1,500 meters is about 5 cubic meters per cubic meter of source rock. It is possible that the generation process of microbial methane still continues. Accumulation of microbial methane within the autochthonous Miocene strata was facilitated by high sedimentation rate and rhythmic and cyclic deposition of clays and sands.

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

Kotarba M.J., Wilczek T., Kosakowski P., Kowalski A., Więcław D.

Przegląd Geologiczny

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1998

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Vol. 46, nr 8/2

742-750

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.