The issues of tectonic zoning and structure of the surface of the Upper Devonian Frasnian deposits of the Bragin-Loyev structural bridge and the adjacent territories of the Pripyat and Dnieper-Donetsk troughs, as well as the adjacent areas of the North Pripyat shoulder, the Gomel structural bridge and the southwestern regions of the Voronezh anteclise, are considered. Taking into account the existing and obtained additional geological and geophysical data, for the first time a structural map of the uneven-aged surface of the Frasnian deposits of the bridge and the adjacent territories was compiled. The subdivision of the sections of wells that entered the formations of the Frasnian stage of the studied areas is given in accordance with the new Stratigraphic scheme of the Devonian deposits of Belarus; there is a description of positive and negative local structures, limited by large and small faults, which are assigned with geographical names.

Оn the basis of many years of research, including field instrumental observations of the development of landslide and other exogenous geological processes, as well as their mapping and photography, the classification of landslides in Belarus is carried out. The analysis of the manifestation of landslide processes within Belarus made it possible to identify their genetic types for the territory of the country: shearing landslides, squeezing landslides, landslides-streams and floating landslides. The main objects of impact of landslide processes are residential and non-residential buildings and communications in settlements, quarries for the extraction of nonmetallic raw materials and the republic’s roads.
It was found that the activation of the landslide process is due to the action of atmospheric and technogenic factors, the intensity of the impact of landslides in the spring and autumn periods is especially high, as a rule, the winter period is not process-hazardous, however, isolated cases of landslides can be observed in winter. In most cases, the manifestation of the landslide process is accompanied or is a consequence of the development of other geomorphological processes (river erosion, suffusion, etc.). In addition, the negative impact of landslide processes on housing and utility facilities is due to the absence or unsatisfactory condition of protective structures, as well as the failure to comply with the necessary protective measures. The studies carried out indicate the need for a comprehensive assessment of the hazard of landslide processes in order to ensure the safety of life of the population and the normal operation of structures, mainly housing facilities and transport communications.

This paper presents a detailed description of some isolated scales of a new species of the ray-finned fish of Cheirolepis bychovensis sp. nov. found in the Lepel and Adrov deposits of Belarus. The data that the author has available suggest that the scales of this species are much more numerous in the rocks of the Lepel age, than in the Adrov rocks. This may be due to the fact that the Adrov deposits are so far poorly known in terms of their palaeoichthyology. Further investigations are needed to clarify this moment. The scales are well preserved, which allowed us to study and describe them in detail. In addition to the descriptive palaeontological part the paper presents the evidences of the associated organic remains found together with the scales of representatives of this ray-finned fish, and also provides a lithological characteristic of the enclosing rocks in which the scales of the new species were found. The data presented in the paper supplement the information on the taxonomic composition of the Late Emsian and Early Eifelian ichthyofauna within the country. The Stratigraphic Chart of the Devonian deposits of Belarus (2010) was used as a stratigraphic ground.

The results of palynological and paleocarpological analyzes of ancient lacustrine interglacial deposits from the sections of two boreholes drilled in the Chaussy district of the Mogilev region are presented. It has been established acording to spore-pollen data that these deposits accumulated during the first half of Borkovian interval Belovezhian Interglacial (Middle Pleistocene). Paleocarpological materials do not conflict this conclusion and allow to get a more complete picture of the flora composition. Four pollen zones and corresponding phases of vegetation development are characterized. Quaternary stratigraphy of Mogilev Plain have been clarified and supplemented.

The article discusses the features of the formation of a set of seismic attributes that are informative when interpreting the results of seismic data regional profiles 2D CDPS (Common depth point stack), performed in the Pripyat trough (North-Pripyat shoulder).
Using the technology of specialized processing of seismic materials of seismic data regional profiles 2D CDPS, an object was identified, which is interpreted as a probable zone of rock deconsolidation (fracturing), which is of interest as a possible reservoir.

The possibility of studying the thermal field of the uppermost part of the Earth, its structure by using of synchronous temperature measurements in the near-surface layer of the Earth at a depth of 30 cm is substantiated. The method of working with special recording thermometers is described, and the results obtained are interpreted. The results of trial works at the previously established points of the Molodechno geodynamic test site are presented.

The results of investigation of carbon and oxygen isotopes distribution in dolomites, dolomite marls and dolomite clays of the Emsian-Eifelian section of the North-Polotskaya parametric borehole in the south-east of the Latvian Saddle are given. The section is mainly characterized by near-zero δ13C values that are typical for sedimentary marine carbonates. There are negative excursions of δ13C with an amplitude of up to 4‰, marking gypsum-bearing intervals in the middle parts of the Vitebsk and Osveya horizons and at the border of the Adrov and Osveya horizons. These excursions are explained by the activation of the continental waters inflow enriched with soil carbon, under conditions of a strong basin shallowing and, possibly, its division into separate evaporate ponds. A monotonous 4‰ decrease of δ13C values upwards from the bottom is noted in the Kostjukovichi horizon. It’s due to the activation of a continental runoff during the sediment accumulation of this part of the section, which subsequently led to formation of a 5 meters thick member of carbonate-free clays. It has been suggested that the oxygen isotopic composition of the Early-Middle Devonian sea water in the studied area was slightly lighter (δ18О ~ -5…-4.5‰) than that shown on the Global Chemostratigraphic curve. δ18О values over than ~ -5…-4.5‰, are interpreted as a result of evaporative water concentration, which is most clearly depicted by the numbers in the gypsum-bearing part of the section (0.5‰ – in the Vitebsk horizon, 0.2‰ – in the Adrov and -0.8‰ – in Osveya ones).

Geochemical evaluation of recent covering sediments in the northern part of Belarus is given. The main statistical distribution parameters of macroelements Si, P, K, Ca, Mg, Fe, Al and microelements Pb, Ni, Co, Cr, V, Mn, Ti, Zr, Cu, Ba, Nb, Zn, B are estimated. A Geochemical Polyelement Map for the Vitebsk Region was plotted to a scale of 1 in 200 000. The highest concentrations of microelements have been noted in the southwestern part of the studied area, where nickel, zirconium, niobium, barium and boron exceed the clarke for Belarus from 1.6 to 3.2 times. Based on the analysis of geochemical data, including concentration coefficients and their differentiation, associations of elements ranked in descending clarke order are determined. Geochemical associations for the group of accumulating elements with clarke ≥ 1.5 and for the deficiency group with clarke < 0.7 were identified.

The article considers the geological structure and potassium content of the deposits of the Kopatkevichi area, which is promising for potassium salts. The results of the analysis of geological and geophysical material obtained in the course of exploration work are presented. Particular attention is paid to the characteristics of the VI-p potash horizon, which has the greatest prospects for industrial development. Recommendations are given for further work within the Kopatkevichi area. It is noted that the ores of the potassium horizons common here belong to the red-colored hypersaline association, and the reserves of potassium salts within it can be considered as a reserve base for the Petrikov deposit.

For the first time, using hydrochemical data, a quantitative assessment of the change in flow matrix volume was carried out during experimental fieldwork on desalinization of productive reservoir rocks and enhanced oil recovery at wells 3, 7, 17 and 21 of the Berezinsky oil field. The calculations carried out according to the author’s methods show that the total increase in the flow matrix volume due to the dissolution of secondary halite in different wells ranges from 1369.0 m3 (well 17) to 776.6 m3 (well 7). Taking into account the large scale of salinisation of inter-salt rocks of the Berezinsky field, it can be argued that only a small part of the productive reservoirs rocks, mainly in the bottomhole zones of wells, was subjected to desalinization. Despite this, there was a noticeable change in the poroperm properties of rocks within the zone of influence of the considerate wells, which is confirmed by the results of hydrodynamic well survey, by increase in their injectivity with each subsequent cycle of field trial and by production enhancement of oil and liquid.

Insidesalt rocks of the upper salt-bearing are very important oil-bearing and oil-promising object: there are discovered a series oil fields. These sediments have high capacity values for hydrocarbon accumulations in a series oil-bearing areas of Prypiat oil-and-gas bearing basin; there are multiple direct signs of oil content in the core. Insidesalt rocks of the upper salt-bearing have complicated geological structure, there is limited research for reliable forecasting of reservoir rocks, trap and their tracking by area and section [3].

The article describes the results of processing hydrochemical information of the production well of the Voronezh oil deposit of the Zolotukhinsky field because of the features of their exploitation, which allowed us to establish general patterns of changes in hydrochemical and technological parameters through all of development of the considerate deposit . The results of hydrochemical studies show a essentially different character of its development within the western and eastern parts. The western parts of the deposit were developed in a combined expansiontype water-drive and artificially water drive regimes, while the eastern part of the deposit was characterized by an active artificially water drive regime. The reservoir fluid flow velocity within the deposit are estimated at 0.56–15.83 m/day. The calculated volumes of dissolved and carried out secondary halite inclusions with associated waters amounted to 4870 m3, resulting in a significant change in the porosity and permeability properties of productive sediments. The results of the conducted research are recommended to be used in correcting the hydrodynamic model of the Voronezh deposit of the Zolotukhinsky field and compiling a new project documentation for its further development.

The authors of the article present the results of laboratory research methodologies for assessing the representativeness water chemistry data generated from the testing and development wells. The authors made a pilot evaluation of the representativeness water chemistry data during drilling of the well V-Vystupovichskaya 3, also assess oil potential of the intersalt stratum.

The geological structure of the Zadonsk deposits in the central part of the Chervonoslobodsko-Malodushinsky step of the Northern region of the Pripyat trough is considered using the Novo-Korenevskaya area as an example. Regularities in the distribution of organic matter and their relationship with the lithological composition of rocks are revealed. The dependence of the type of organic matter on the sedimentation environment in the paleobasin has been established. Regularities in the processes of transformation of organic matter, depending on the type of primary organic matter, are revealed. The conditions for OM disposal are improving along the section from the deposits of the Kuzmichevsky horizon to the deposits of the Tremlyansky horizon. The degree of transformation of organic matter increases as the sediments of the intersalt complex sink and reaches the MK1 level from a depth of 2870 m.