Vol. 337 No. 3 (2026)
DOI https://doi.org/10.18799/24131830/2026/3/5333
Determination of hydrodynamic sedimentation conditions for the upper and lower tanychya formation based on genetic interpretation of granulometric data
Relevance. The reconstruction of paleohydrodynamic sedimentation conditions is fundamental for building reliable sedimentological models of terrigenous hydrocarbon reservoirs. A detailed study of the granulometric composition makes it possible to identify the spatial variability of reservoir properties and substantiate the prospects for oil and gas potential. Aim. To identify the relationship between the hydrodynamic activity of the sedimentation environment, determined through the comprehensive interpretation of granulometric data, and the boron content in terrigenous reservoirs of the upper and lower parts of the Tanychya Formation. Methods. Granulometric analysis of 91 samples was performed using the laser diffraction method. A comprehensive approach was used for the genetic interpretation of the data, involving the construction and analysis of Passega (C-M), Rukhin, and Rozhkov (asymmetry-kurtosis) diagrams. Results and conclusions. Key statistical parameters: median diameter (Md), sorting coefficient (So), asymmetry coefficient (Sk), kurtosis, and skewness, were calculated. The comprehensive analysis revealed that the rocks of the TP22 layer were formed in coastal-marine conditions near the continent with the effect of river runoff, while the TP1 layer was deposited farther from the shoreline in a setting of higher wave activity. A clear dependence of boron accumulation in sandy reservoirs on the energy of the sedimentation environment was established: higher relative boron contents (CB~0.035) in the TP1 layer, formed under conditions of intense hydrodynamics, compared to the TP22 layer (CB~0.03), indicate the key effect of wave activity on the accumulation of this element alongside the paleosalinity of the basin. The obtained results refine the facies model of the studied deposits as a coastal-marine bar complex and form the basis for predicting the filtration-capacity properties of the reservoirs.
For citation: Khodorov I.S., Melnik I.A. Determination of hydrodynamic sedimentation conditions for the upper and lower tanychya formation based on genetic interpretation of granulometric data. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 3, pp. 85–97. https://doi.org/10.18799/24131830/2026/3/5333
Keywords:
granulometric analysis, hydrodynamic sedimentation conditions, Tanychya Formation, genetic diagrams, coastal-marine facies, boron, Yamalo-Nenets Autonomous Okrug
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