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Geology & Geochemistry of Combustible Minerals No. 3–4 (199–200) 2025, 5–12
https://doi.org/
Dmytro FEDORYSHYN1, Oleksandr TRUBENKO2, Serhii FEDORYSHYN3, Taras LINKO4
1, 2, 3 Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, Ukraine,
e-mail: 1dmytro.fedoryshyn@nung.edu.ua; 2geotom@nung.edu.ua; 3serhii.fedoryshyn@nung.edu.uaigggk@mail.lviv.ua
4 JSC “Tysmenytsiagas”, Tysmenytsia, Ukraine,
e-mail: 4 taras.lenko-a103-23@nung.edu.ua
Abstract
The paper addresses to the topical scientific and practical issue of enhancing the efficiency of hydrocarbon recovery from reservoir rocks formed in thin-bedded Neogene deposits of the Bilche-Volytska zone in the Precarpathian Basin. The reservoirs in this region are characterized by complex lithological structure, significant layering, variability in granulometric composition, and generally low filtration and storage properties. An additional complicating factor is the high heterogeneity of the strata, which manifests itself in both horizontal and vertical directions, significantly affecting the efficiency of oil and gas extraction using traditional methods.
The paper provides a detailed analysis of the geological prerequisites for the formation of thin-bedded sandstone-siltstone complexes, including their petrophysical characteristics, such as porosity, permeability, cementation type, and fluid saturation degree. Considerable attention is paid to the study of the filtration properties of rocks in the context of the spatial variability of reservoir parameters that determine the productive potential of wells. The influence of structural and tectonic factors on the formation of traps and the distribution of reservoir zones is considered separately.
The main factors limiting well yields in such geological conditions are analyzed, and possible ways to optimize development are considered. Improving geological and geophysical models, applying modern intensification methods, in particular hydraulic fracturing and acid treatment, as well as introducing technologies for detailed zoning of productive intervals, are promising areas for improving production efficiency. The work emphasizes the importance of a comprehensive approach that combines geological analysis, laboratory research, and modelling of filtration processes to ensure the rational and efficient development of resources in this complex category of reservoirs.
Keywords
rock, pore space, porosity, electrical resistivity, clay content
Referenses
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