S. Vyzhva

Taras Shevchenko National University of Kyiv

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ІO

І. Onyshchuk

Taras Shevchenko National University of Kyiv

V. Onyshchuk

Taras Shevchenko National University of Kyiv

ОS

О. Shabatura

Taras Shevchenko National University of Kyiv

МR

М. Reva

Taras Shevchenko National University of Kyiv

ІB

І. Bezrodna

Taras Shevchenko National University of Kyiv

G. Lisny

Energostal (Ukraine)

I. Solovyov

Energostal (Ukraine)

V. Kruhlyk

Energostal (Ukraine)

ОM

О. Menshov

Taras Shevchenko National University of Kyiv

G. T. Prodayvoda

Taras Shevchenko National University of Kyiv

Cooperative Institutions

Taras Shevchenko National University of Kyiv

Czech Academy of Sciences, Institute of Geology

National Academy of Sciences of Ukraine

Karaganda State Technical University

University of Urbino

Institute of Geophysics

Naftogaz (Ukraine)

National University of Kyiv Mohyla Academy

Institute for Soil Science and Agrochemistry Research

National University

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Recommendations for wells drilling in the unfavorable structural-tectonic conditions

Geoinformatics: Theoretical and Applied Aspects 2020 (2020)

S. Vyzhva I. Solovyov V. Kruhlyk G. Lisny

10.3997/2214-4609.2020geo030

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Citations (1)

Investigations of the Effects of Polarization in Rocks

Proceedings (2018)

S. Vyzhva V. Onyshchuk І. Onyshchuk M. Reva

10.3997/2214-4609.201800088

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The structure of void space of complex structured Bashkir carbonate reservoir rocks from the Opishnianske deposit of the DDD

Geofizicheskiy Zhurnal (2019)

S. Vyzhva І. Bezrodna Oksana Tkachenko

The analysis of materials of well-logging of the wells of the Opishnanske deposit of the DDD was conducted for the purpose of the determination of their reservoir promise. The void structure of Bashkir carbonate reservoir rocks (productive horizon B-10) of 11 wells of the Opishnanske deposit of the DDD was defined for the first time in this article. The quantitative assessment of porosity types of reservoir rocks was done using a method, developed at the Taras Shevchenko University of Kyiv, which basis is a complex of well-logging methods that includes radioactivity and acoustic logging. Using well-logging methods, the potential reservoir rocks were distinguished, the forms of voids were calculated, and the contribution of different void types (intergranular, fracture, vuggy, secondary porosity) in the absolute porosity was assigned. As a result of the study, it was found that the fracture voids are present to a large extent only in layers, presented by water-saturated reservoir rocks, whose fracture porosity ratio acquire values from 0,2 % to 1,5 %. The fracture type of voids is present in layers with gas-saturated reservoirs in rocks with considerably lower concentrations (from 0,05 to 0,29 %). The vugggy voids are distinguished in almost a majority of layers, a vuggy porosity ratios in them reach 9,8 %. Based on the determination of type and concentration of voids in car-bonate reservoir rocks, the promise and predictive discharges of water and gas were determined by authors using a calculated parameter of the unit surface area of voids. The authors have identified the predictive yields higher than 1tonn per day in all wa-ter-saturated reservoir layers, and the highest were in two layers with daily flowrates of 307 and 3200 t/d in the well intervals of: 2816,4—2820 m (№ 12) and 2864—2870,4 m (№ 114). The highest predictive discharge of gas, that is 352 thousand cubic meters per day, is determined in a well 127 (the interval of 2773,8—2775,5 m). The gas discharges in three intervals of the well 127 are calculated within 140 thousand cubic meters per day (2762,4—2764,7, 2788—2790, 2822,8—2824,4 m). Increased discharges correlate with the presence of fracture and increased secondary porosity.

Void (composites)

10.24028/gzh.0203-3100.v41i3.2019.172472

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Crushing and grinding minerals deposits of the western area Nurkazgan

Bulletin of the Karaganda University Physics Series (2017)

V.S. Portnov L.K. Novikova S. Vyzhva N.V. Reva A.R. Baizhanova

Crushing and grinding minerals deposits of the western area NurkazganThe paper calculated the total surface energy of the mineral deposits Nurkazgan West, which is equal to: σ = 0,806 J/m 2 .The main contribution to the surface energy of the field West Nurkazgan minerals contribute quartz (SiO 2 ) and corundum (Al 2 O 3 ).Designed overall operation of the fragmentation of 1 ton of mineral deposits Nurkazgan to a piece of 5 mm, which is A = 3.014 J.This corresponds to a specific energy consumption E = 30.2kW•h/t.It shows that to increase the efficiency of ore crushing need to increase the defects of the mineral structure, reduce the temperature and increase the power of crushing.Cooling is best in ore hopper using liquid cryogenic plants.It is shown that an abrupt change of work crushing and defects in the mineral structure can be achieved with the optimal use of energy in the blast ore production stage or electroimpulse crushing hopper.It is shown that the minimum value of the grain size is determined by the surface energy: mind → minσ 2 .This condition determines the efficiency of ore grinding.To increase it is necessary to decrease the surface energy minerals.It is shown that the most cost-effective mix before the process of crushing and grinding the ore Western and Northern regions Nurkazgan field.

Mineral processing

10.31489/2017ph1/29-46

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Inelastic-elastic properties of SiO<inf>2</inf>, SiO<inf>2</inf> + TiO<inf>2</inf> + ZrO<inf>2</inf>

А. П. Онанко М. P. Kulish O. V. Lyashenko G. T. Prodayvoda S. Vyzhva

A non-destructive method for the technological control of the structure defects in SiO 2 + Si wafers by measuring the internal friction background difference on the nearby harmonics f 1 and f 2 after mechanical and heat treatments.

10.1109/omee.2012.6464790

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Prediction of filtration and capacitive properties and oil saturation characteristics of complex structure carbonate reservoirs (on the example of the Northwestern part of DDB)

Prospecting and Development of Oil and Gas Fields (2020)

O. V. Oliinyk S. Vyzhva V. Antoniuk І. Bezrodna

The world achievements of the study of carbonate reservoir rocks with secondary voids have been analyzed. An integrated approach to the study of this type of reservoir has been demonstrated on the example of reservoir rocks of the Visean strata of the South-Berestivske field in the North-Western part of the Dnipro-Donets Basin. The purpose of this article is to predict the reservoir filtration-capacitive properties, as well as oil saturation characte-ristics of complex carbonate reservoir rocks using well logging data. To solve this problem, an integrat-ed approach is used. It includes the methods of porosities balance and functional transformations (normalization) of the electrical and radioactive well logging curves (lateral logging - neutron gamma ray logging, impulse neu-tron-neutron logging - neutron gamma ray logging). As a result, the authors have identified intervals in the Visean carbonate deposits with cavernous voids and cracks. Each individual geophysical method is influenced by the structure of the void space. Due to this, when calculating the porosity coefficient for different probes, the au-thors identify intervals represented by carbonate deposits, mainly of the porous-cavernous type. However, there is an interval of 4287.6-4289.6 m of porous-cavernous-fractured type. It is established that in the selected layers the coefficients of different types of porosity are: secondary - 2.5-6%, cavernous - 1.7-5% and fracture -0.2%. The thickness of pro-ductive sediments varies within 0.8 - 2.4 m (the average value is 2 m). The authors also substantiated the choice of parameters when calculating the saturation coefficient in complex structural reservoirs. Moreover, it is noted that the reservoir properties are provided by the presence of secondary voids, namely the cavities through which the fluid is filtered, and the rock matrix is compacted, poor-porous and low-permeable.

Saturation (graph theory)

Petroleum reservoir

10.31471/1993-9973-2020-2(75)-78-87

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ACHIEVING SUSTAINABILITY IN COUNTRIES WITH ECONOMIES IN TRANSITION: NEW OPPORTUNITIES AND PROSPECTS

Visnyk of Taras Shevchenko National University of Kyiv Geology (2021)

Г. М. Аубакирова H. I. Rudko S. Vyzhva В.С. Портнов F. M. Isatayeva

The article examines Kazakhstan, the largest economy in Central Asia, which, on the way to sustainable economic growth, adequately responds to systemic challenges and adapts the experience of advanced countries. The generalizing indicators of the effectiveness of state regulation of the processes contributing to the growth of the stability of the national economy are given. The reasons for the weak involvement of entrepreneurs and citizens in measures for the sustainable development of Kazakhstan have been identified. It has been substantiated that the development of a strategy for the country's sustainable development and the achievement of inclusive economic growth require coordination of the work of government bodies, business and civil society. It is shown that in Kazakhstan the main drivers for the implementation of the culture of sustainable development are large enterprises and the quasi-public sector. Private enterprises do not yet see the opportunity to profit from integrating sustainable development goals into business processes. The paper emphasizes that in order to increase the stability of the poorly diversified economy of Kazakhstan, emphasis should be placed on the transformation of the mining sector, which has the potential to maintain investment attractiveness, both for domestic and foreign investors. Based on the results of the study, the authors highlight the most important aspects of building a new model of sustainable development in the foreseeable future.

Sustainable Growth Rate

10.17721/1728-2713.95.10

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METHODOLOGICAL PRINCIPLES OF GEOPHYSICAL STUDIES OF KARST DANGEROUS TERRITORIES

Visnyk of Taras Shevchenko National University of Kyiv Geology (2021)

S. Vyzhva V. Onyshchuk І. Onyshchuk М. Reva О. Shabatura

The article is devoted to the analysis of the methodological principles of applying geophysical research methods in the study of karst-hazardous territories. The tasks that are posed in specialized studies of karst and geophysical methods for their solution are given. Four stages of specialized studies of karst-hazardous territories are identified: reconnaissance-methodological, prospecting, reconnaissance and monitoring. The set of geophysical methods for the development of these stages are determined. It is noted that a rational set of geophysical methods in the study of karst processes is determined for each individual natural environment (individual site). The possibility of performing field research by a separate geophysical method in this area, the presence of differentiation in rocks according to their physical properties which are used by a specific geophysical method and economic efficiency of the application of this geophysical method were taken into account. As an example, some results of geophysical studies carried out in the framework of the Lyubensky field of native sulfur are given.

Geophysical prospecting

Exploration geophysics

10.17721/1728-2713.92.04

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Citations (1)

Magnetic mapping and soil magnetometry of hydrocarbon prospective areas in western Ukraine

Studia Geophysica et Geodaetica (2015)

О. Menshov R. Kuderavets S. Vyzhva І. Chobotok T. Pastushenko

Hydrocarbon exploration

Soil gas

Anomaly (physics)

10.1007/s11200-015-0705-4

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Citations (20)

Analysis of Elastic and Acoustic Properties of Reservoirs in Dependence on the Pores Structure, Saturation and Shaliness

Proceedings (2011)

T. M. Kuzmenko S. Vyzhva І. Bezrodna G. T. Prodayvoda

The 24 mathematical models of carbonate reservoirs for Volino-Podolska petroleum province are created. The elastic and acoustic properties in dependence of fluid saturation and shaliness are investigated. The methods of matrix regularization, variation expansion and matching, conditional instantaneous functions, conditional moment functions with Mori-Tanaka scheme application, stochastic differential equations are used. During the investigation the next results are obtained: the elastic parameters of carbonate rocks, the components of the acoustic tensor, the coefficients of differential and integral anisotropy varies in dependence of saturation, type of porosity, different types of clay inclusions, their concentration and orientation that varies from 0 to 18%. The parameters of the elastic and acoustic anisotropy can be indicators of fluid saturation and clay content of the carbonate reservoir rocks.

Saturation (graph theory)

Water saturation

10.3997/2214-4609.20149707

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