Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods

The Timan-Pechora basin still has a large importance and as a potential region for the hydrocarbons mining in Russia. At present, new facts are emerging from oil and gas exploration. The authors studied more than 50 samples from 11 wells. Most samples in this series were related to the Middle-Late-Frasnian sediments (Late Devonian), which are allocated in «domanic» horizon. Organic macerals of the studed samples are represented both by fragments of humic macerals and sapropelic OM (formed from algal material). The common organic macerals in Timan-Pechora basin are bituminites. They were met in all samples without exception and provide total content of OM,% in the rock. Bituminites are regularly distributed among mineral matter and color the rock in gray or more dark colors. Bituminite was used to determine the reflectance index (RB,%) that later was converted into the corresponding equivalent of vitrinite reflectance index (RVeq,%). This is particularly important as authors’ information was used together with the results of earlier studies. ID-modeling has been made in the program PetroMod (2015.1 Schlumberger) and helped to understand evolution in Timan-Pechora basin and maturity degree of rocks. The concept of the model was coordinated with the main evolution stages of the northeast European Platform and the foredeep Ural trough. The thicknesses of catagenesis zones and position of boundaries between them are indicators of thermal regime in the analyzed regions. The heat flow used in the modelling was one and the same for most tectonic regions (except foredeep Ural trough and Khoreiverskaja depression). According to the classification of the sedimentary basins by P. Robert (1985), 5 regions belong to regions with a normal or slightly hypothermal geothermal regime (heat flow 45-65 mV/m2) and foredeep Ural trough with heat flow up to 74 mV/m2 is a region with a high hyperthermal regime

Elective course material (Microbial communities)

This article gives an outline of data concerning formation and functioning peculiarities of microbial communities in the form of biofilms. Peculiarities of metabolic processes and virulent properties of bacteria existing in biofilms which are connected to those processes are highlighted in the article. The necessity of taking into account these peculiarities when carrying out antibacterial therapy is also state

Geology and coal bearing capacity of the Russian Arctic in connection with prospects of development of the region

Detailed geologic information can be priceless for oil- and gas- oriented geologic exploration in Arctic aquatic basins. Exploration reports on coal basins and deposits located along the Arctic coast are highly detailed and can be used for reconstruction of facies and thermobaric conditions of the poorly explored offshore areas. The article summarizes information on the Russian Arctic coal basins geology: geological structure, tectonic settings, coalforming environments and coal quality parameters. Coal basins of the region contain not only brown and bituminous coals for energetics, but include valuable coking coal (Pechorskiy, Tungusskiy, Beringovskiy basins), anthracite, thermoanthracite and graphite (Taimyrskiy, Tungusskiy basins, Dolgozhdannoye deposit), related coal methane (Pechorskiy basin, coal deposits of Spitzbergen) and trace elements (Lenskiy basin, coal basins and deposits of Chukotka and Frantz Josef Land). It is also can be used for production of advanced materials (adsorbents, sunthetic graphites, etc)

State regulation and development of digital educational platforms

The introduction of digital platforms influences all areas of social development, including the education sector. The Russian government, in a bid to take advantage of this, has encouraged the development of a solid educational system that can support digitalization’s effect on the economy. The paper aims to analyze the development of Russian digital platforms in general and educational platforms, as a decisive factor in economic competitiveness on the world market. The study was a descriptive research and Russia was the main population for the study. The research made use of secondary data from national and international sources. An analysis of modern practices in the field of digital educational platforms shows that educational organizations cannot independently use digital technologies at the new level of requirements. For this purpose, a functioning digital ecosystem is needed that would be able to provide a variety of new technologies in education

Domanic deposits of the Volga-Ural basin – types of section, formation conditions and prospects of oil and gas potential

The Domanic deposits of the Volga-Ural oil and gas basin are a high-carbon thin-bedded formation capable of both producing hydrocarbons with its own oil and gas bearing strata and concentrating them in separate reservoirs and zones (Stoupakova et al., 2015). Formation of the Domanic deposits occurred in a relatively deep basin, during the filling of which a variety of sedimentation environments arose from relatively deep sea to shallow-marine. The peculiarity of the formation conditions of high-carbon strata is the increased content of organic matter, carbonate material and free silica, the source of which could be hydrotherms or volcanogenic products, creating a special gas regime of the Earth’s atmosphere in the late Devonian. Evaluation of the generation potential of the Domanic formation showed that siliceous-carbonate and carbonate-siliceous rocks enriched with marine algal organic matter have a high potential. The greatest prospects of oil bearing are the deflections formed on the site of the avlakogen and their slopes, where deposits, rich in organic matter, were formed practically throughout the late Devonian-Tournaisian. High prospects have slopes of uplifts or sides of reef bodies. Such incisions are distributed on the sides of troughs of uncompensated immersion and the lower parts of uplift slopes adjacent to them. In the domanonicoid deposits, in which the carbonate material predominates, the high-carbon intervals developed along the biohermic structures