GENETIC TYPES AND PETROLEUM POTENTIAL OF THE UPPER SERPUKHOVIAN TERRIGENOUS DEPOSITS OF THE TERRITORY OF MARGINAL TRAP-DOWN FAULTS OF THE NORTHERN FLANK AND BANK ZONES OF THE DNIPRO-DONETS DEPRESSION

• Datum: 2025
• Hauptverfasser: Коржнев, П.М., Лукін, О.Ю., Стрижак, В.П.
• Format: Artikel
• Sprache: Ukrainian
• Veröffentlicht: Institute of Geological Sciences, NAS of Ukraine 2025
• Schlagworte: Petroleum potential; Dnipro- Donets Depression; upper Serpukhovian terrigenous deposits; petroliferous sandstones; hydrocarbon traps
• Online Zugang: http://geojournal.igs-nas.org.ua/article/view/328263
• Назва журналу: Geological journal

The material composition, reservoir and petrophysical properties of the upper Serpukhovian terrigenous deposits of the territory of the northern bank and northern flank tectonic zones of the Dnipro-Donets Depression were investigated. The territory of the study covers Kharkiv and partially Chuhuyiv districts of Kharkiv region. This is an elongated strip of terrace-like structures, low-amplitude semi-closed anticlinal folds, actively complicated by a system of transverse and longitudinal tectonic marginal and trap-down faults. The study of the core, thin sections, well logging as well as mapping of the parameters of the number and the total thickness of siltstones and sandstones layers of the prospect horizons C-2–3, C-4–5 contributed to the determination of the genetic features of reservoirs. It was established that sedimentation occurred in coastal-marine, avantdelta sedimentary settings. This is evidenced, in particular, by the interpretation of elementary sandstones bodies as regressive coastal bars, nodal accumulative sandstones bodies that were formed with the active participation of paleocurrents. A certain set of genetic types of sandstones in combination with paleotectonic conditions of the Serpukhovian sedimentation caused the formation of a number of morphogenetic types of traps, these are: – structural (vaulting) in plicative deformations of sandstone layers; – tectonically shielded sand layers on the wings and periclinal of anticlinal structures; – lithological-structural traps associated with regressive coastal bars, as well as with flake-like lenses of the latter in the vaulted parts of the structures; – structural-lithological (often with elements of tectonic screening) traps in various accumulative bodies, on the wings and periclinal of structures; – structural-lithological traps associated with sandstones of predominantly flow type, which are wedged out towards the arch, as well as avandelta channels. A significant influence of the sedimentary-paleogeomorphological factor on the petroleum potential of the upper Serpukhovian terrigenous deposits has been established.