D. Klyazhnikov* (Ingenix Group), V. Pankov (Lomonosov Moscow State University)
Lower Permian carbonate deposits are widespread on the territory of the Russian plate, including on its Eastern outskirts, within the Urals. They are characterized by extensive lithofacial heterogeneity, significant variability of porosity and permeability, the predominant development of low-pore reservoirs. The paper presents a comparative analysis of the lower Permian carbonate deposits confined to the Northern and southern parts of the pre-Ural regional deflection. A similar lithological structure of sediments, due to the common spatial and temporal features of the territory, allows to perform such a comparison. For the analysis, the results of the core study and GIS data on the Kochmes field located in the Northern part of the Urals, and a number of areas in the South – Nagumanovskaya, Peschanaya, Vershinovskaya etc. On the basis of sequence stratigraphy method involving sedimentological and lithological-petrographic study of the core, the main facies of the situation were identified. Evaluation of the lithological volume model and permeable identification were carried out using lithodensity log, spectral gamma-ray log, cross-dipole array sonic log etc. The most high-capacity rocks are confined to facies of organogenic buildings in the southern part of the pre-Ural regional deflection, with a predominance of porous-cavernous and porous reservoirs.