Sedimentation modeling of the Northern part of the Pre-Caspian depression

UDK: 550.8.072

DOI: 10.24887/0028-2448-2025-5-42-48

Key words: sedimentation modeling, Pre-Caspian depression, northern side of the Pre-Caspian depression, carbonate platform, facies environment

Authors: O.A. Emelianenko (BGT RUS LLС, RF, Moscow); M.T. Delengov (BGT RUS LLС, RF, Moscow); S.F. Khafizov (Gubkin University, RF, Moscow); M.L. Makhnutina (BGT RUS LLС, RF, Moscow); K.I. Dantsova (Gubkin University, RF, Moscow); L.V. Miloserdova (Gubkin University, RF, Moscow)

The article describes the methodological features of performing sedimentation modeling in the DionisosFlow™ software, as well as the results of a study on the subsalt deposits of the northern side of the Pre-Caspian depression. The input parameters for the model are described. Modeling in the DionisosFlow™ program enables to obtain detailed forecast maps of facies with high vertical resolution. The method is based on consideration of the accommodation zone, the influx of sedimentary material and the formation of carbonates and precipitation transfer based on the diffusion equation. Based on the criteria of sedimentation conditions, the probable position of facies within the simulated area is determined. The results obtained reflect the main stages of formation of the Devonian-Lower Permian sedimentary cover of the Caspian syneclise. Throughout the history of its development, the Central Caspian depression represented the most submerged parts of the sedimentation basin, where deep-sea sedimentation facies were concentrated and the farthest from the sources of demolition. Carbonate platforms and reef massifs are developed in the side zones. Powerful paleochannel systems ensured the flow of detrital material deep into the depression and formed a clinoform complex. The paper presents maps of the distribution of facies conditions into the main stages of sedimentary cover formation, which can be used for further basin modeling within the northern side of the Pre-Caspian depression.

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