Geological excursion to the Polish Flysch Carpathians

Amsterdam Petroleum Geoscience organized a geological excursion in cooperation with an allied petroleum company, Geokrak, located in Krakow. In mid-September, the excursion led the participants to the Flysch Carpathian Belt in southeast Poland. The AmsterdamPG team visited the outcrops at the border of the Outer Carpathians and its foreland basin for four days, September 13-16. The scope of the terrain included geologic outcrops to (abandoned) quarries.

The aim of the geological excursion was to study the geological features of reservoir and source rocks formed by the Silesian nappe. This is one of the oldest oil producing areas in the world. Source rock characteristics are visible at the surface and equivalently are buried down to several kilometers where they become mature for oil and gas. The source rocks are Menilite black shales (deep water deposits), rich in organic matter. Two types of reservoir rocks were observed, limestone reservoirs (reef facies) that occur in the East European platform and sandstone reservoir rocks from the Silesian nappe. The latter generally consists of deep-sea fan or turbidite deposits, occasionally disturbed by faults, (parasitic) folds or syn-depositional irregularities. Some outcrops showed excellent examples of turbidites dominated by convolute bedding (see figure).

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