Assessment of the oil and gas potential of the Kurshskaya depression of the Baltic syneclise based on basin modeling

UDK: 550.8.072

DOI: 10.24887/0028-2448-2025-5-20-25

Key words: Kurshskaya depression, Baltic syneclise, hydrocarbon systems, basin modeling, assessment of oil and gas potential, history of tectonic development

Authors: G.I. Fayzullin (Gubkin University, RF, Moscow; Russian Research Geological Petroleum Institute, RF, Moscow); V.S. Budanova1,3 (Gubkin University, RF, Moscow; Geodin LLC, RF, Moscow); K.I. Dantsova (Gubkin University, RF, Moscow); O.A. Emelyanenko (Gubkin University, RF, Moscow); M.T. Delengov (Gubkin University, RF, Moscow); A.S. Kurushina(Gubkin University, RF, Moscow); S.F. Khafizov (Gubkin University, RF, Moscow)

As part of the research, volumetric basin modeling of hydrocarbon systems of the Kurshskaya depression was carried out, and the history of its geological evolution was studied. The time of entering of oil and gas source deposits in the main oil formation zone and the beginning and volumes of intensive hydrocarbon generation are determined, the position of oil and gas source rocks in the hydrocarbon generation zones is shown at the present time. The main elements of hydrocarbon systems and the processes occurring in them are described. The main tectonic eras in the geological history of the formation of the Kurshskaya depression were identified and described. An assessment of the prospects of oil and gas potential is given. The main source of hydrocarbons in the sedimentary part of the Kurshskaya depression are rocks of the lower division of the Cambrian system (Aischaiskaya series) and the Llandoverian division of the Silurian system. The generation of hydrocarbons began in the Early Devonian and still continues to this day. The generated hydrocarbons accumulate in structural traps associated with rocks of the Deymenskaya formation of the Cambrian system. The main prospects are related to the regional reservoir of the Middle Cambrian age. The conducted basin modeling confirmed the oil and gas potential of the territory and also enabled to compare the results with the structures identified as a result of seismic exploration work.

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