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17th International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: May 14-17, 2018
- Location: Kiev, Ukraine
- Published: 14 May 2018
1 - 50 of 125 results
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Natural geoinformation foresight of earthquakes
More LessSummaryThe results of frequency-resonance studies of the seismically active zone on the border of Iran and Iraq, where the earthquake occurred on 12.12.2017 with an amplitude of M 7.3, the coordinates Lat 34.79 N, Long 45.85 E and the depth of the focus D: 23.6 km are presented. It was noted that before the first shock on the surface of the seismically active area were recorded signals of ozone and xenon. There is no information about relation of xenon to earthquakes in the world publications. The structure model of the earth’s crust where different thickness and physical properties of geological strata can be represented by a set of flat capacitors is suitable for explaining the physical phenomena observed before and during the earthquake.
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From magnetic domains to geologic terranes: paleomagnetism, geotectonics and some earth science problems
Authors V.G. Bakhmutov, I.B. Poliachenko and S.I. CherkesSummaryPaleomagnetic data are the main source of information for global paleotectonic reconstructions representing horizontal movements of the crustal blocks. Reliability and quantity of paleomagnetic data as well as uniformity of their distribution within the apparent polar wander path (APWP) determine accuracy of paleotectonic reconstructions that significantly depends on the APWP quality. This shows the importance of obtaining new reliable paleomagnetic data. In this paper summarizes the investigation of rocks of the Inghul megablock of Ukrainian Shield (US) resulting in paleomagnetic poles for 1750, 1770 and 2037 Ma were obtained. Based on the available paleomagnetic poles, the kinematic parameters for the US (Ingul and North-West megablocks) and Fennoscandia were calculated. In addition, the results of studying the rocks of the Ediacaran traps and also the parameters of corresponding paleomagnetic poles for 580 and 561 Ma were presented. Also, there is presented a study of the sedimentary rocks of Podolia, which made it possible to clarify the Ordovician-Silurian APWP part for the Baltica, make a kinematic assessment of the Baltica in the Middle Paleozoic and carry out the paleotectonic reconstruction. The last study relate to the refinement of the Pangea configuration in the Permian-Triassic period, resulting in paleomagnetic determinations for andesite and trachyte dike complexes in the eastern part of the US (with an estimated age of 210 and 280 million years) were calculated. An analysis of the gathered data showed that the alternative model of Pangea (Pangea-B) based on a mega-shear of some 3500 km between Gondwana and Laurasia is unnecessary.
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GIS RES in Ukraine – myth or reality?
Authors B.S. Busygin and K.L. SergieievaSummaryEnergy situation in the country requires implementing a set of measures improving energy security and reducing energy costs through the development of technologies for identifying, mapping and evaluating renewable energy sources (RES). Thus, on the one hand, large amounts of data are needed, covering both natural resources and economic characteristics of the region (energy infrastructure, energy balances, power lines, agricultural enterprises, etc.). On the other hand, it is necessary to have software that would allow collecting, storing, simulating, predicting, visualizing big data, would perform comprehensive analysis and obtain analytically based estimates. The peculiarities of information related to solving the problems of forecasting, identifying and assessing RES in Ukraine, require the development of new software and analytical tools based on geoinformation systems and technologies (GIS-technologies) and other spatial geoinformation modeling tools.
The main components of GIS-technology for Ukrainian RES potential estimating are formulated. It is based on methods, models and technologies of statistical and aerospace data integrated analysis in order to create a tool for a specialized geoinformation system, taking into account the Web-oriented approach.
The presented components of the technology are intended to create fundamentally new information services and decision support systems in assessing perspective territories of Ukraine feasible for placing RES power plants.
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The use of geoinformation technologies in economic-geological evaluation of mineral reserves (by the example of κ-MINE GIS)
Authors G.I. Rudko, O.V. Netskyi and M.V. NazarenkoSummaryToday among the existing methods and approaches to evaluation of subsoil resources those implemented in the geoinformation systems (GIS) play an important role. The issues of calculation of mineral reserves, their economic-geological evaluation, creation of an optimum system for field development, environmental issues etc. are main as regards subsoil use.
For more effective making management decisions during the state expert appraisal of materials for economic-geological evaluation (EGE) of fields with different types of minerals it is necessary to consider the experience gained from consideration of each certain field of this type. Economicgeological evaluation (EGE) of mineral deposits is an important stage of works, which is performed at a final phase of field prospecting and directed to determination of a possibility of its further exploitation in current economic conditions.
With the help of the K-MINE geoinformation integrated system it is possible to perform economicgeological evaluation (EGE) of a field with the use of basic means of a geological and surveying support complex for mining operations, and also a module for economic-geological evaluation of mineral deposits.
A module of the K-MINE geoinformation system for economic-geological evaluation of mineral deposits developed in Ukraine by experts of the Research and Production Enterprise “KRYVBASAKADEMINVEST” has been considered. The module represents a universal tool enabling to perform a whole cycle of works on justification of parameters of conditions for mineral raw material, estimation of mineral reserves and calculation of economic indices of development of a field (accumulated discounted cash flow, profitability). The operation of the module as a component part of K-MINE GIS together with the geological and surveying support complex enables to perform a whole cycle of works starting from bringing of all documentation into a digital form and creation of digital models to economic-geological evaluation of a field with the registration of outputs and preparation of reporting documentation.
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Магнитовариационные исследования Ладожской аномалии электропроводности: от открытия в 70-х, до представлений о ее пространственном положении и глубинной структуре по материалам новейших наблюдений
Authors И.И. Рокитянский, Е.Ю. Соколова, Н.С. Голубцова, C. Ковачикова and LADOGA WGРЕЗЮМЕВ докладе представлены результаты глубинных электромагнитных зондирований в районе Ладожской аномалии электропроводности земной коры, которая маркирует АR-PR границу на юго-востоке Фенноскандинавского щита. Открытие этой аномалии в конце 70-х годов прошлого века было совершено благодаря применению нового метода магнитовариационного профилирования. Главной целью современного этапа продолжения ее исследований является получение с помощью новых технологий сбора и анализа данных электромагнитных зондирований более достоверной и подробной информации о региональной геоэлектрической структуре для ограничения геологических и эволюционных моделей.
В фокусе нашего внимания находятся результаты новейших магнитовариационных исследований: разведочные и длиннопериодные синхронные зондирования 2013–2015 годов вдоль профиля Выборг-Суоярви, пересекающего аномалию, а также длиннопериодные наблюдения 2016 года на СВ и ЮВ Ладожского озера. Обсуждаются методические аспекты полевого эксперимента, а также шумоподавляющие процедуры обработки, инвариантного анализа и интерпретации полученных данных. Глубинная архитектура и пространственное распределение зон аномальной коровой электропроводности анализируются по результатам двумерной инверсии на линии Выборг-Суоярви и квази-трехмерной (в аппроксимации тонкого слоя) инверсии регионального ансамбля векторов индукции, проведенных по набору магнитовариационных профильных и площадных данных рабочей группы LADOGA, расширенному аналогичными материалами по прилегающей территории Финляндии. Разрешение поперечного сечения Ладожской аномалии, а также ее прослеживание до ЮВ района, подкрепленное разработанной региональной прогностической 3D геоэлектрической моделью, позволяют интерпретировать результаты ЭМ зондирования в геотектонических терминах.
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Application of fractal dimension approach to the examination of statistics of large ore deposits
Authors M.V. Rodkin and A.R. ShatakhtsyanSummaryThe method of calculation of fractal correlation dimension D values is applied for examination of statistics of large and extra-large ore deposits. The used approach differs from the commonly used one. Firstly, we permit the different D values for different spatial scales that seems to be useful in distinguishing of regularities in the location of ore deposits at different scales. Secondly, we introduce a new notion, a mixed correlation dimension and use it for examination of pairs of objects of different typ (e.g., deposits of Au and Ag). The standard formula for calculating the correlation dimension values can be trivially generalized for such cases. The “mixed D” values can be both lower and higher than the dimension of the hosting medium. The cases when this dimension value is higher than that of the hosting medium are interpreted as a “mutual repulsion” of the deposits of corresponding two types. Small correlation dimensions indicate that the deposits of the corresponding types tend to be located closely.The calculations are conducted for the spherical Earth. Different patterns of the studied behavior are illustrated by the model examples.
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Forecasting zones of high porosity in clay rocks of Eastern Ukraine
Authors S. Vyzhva, I. Solovyov, V. Kruhlyk and G. LisnySummaryThe new approach for clay rock differentiation using porosity value is proposed. This approach is based on the correlation coefficient values analysis for acoustic impedance and shaliness. The correlation between acoustic impedance and shaliness is absent for shale and shaliness rocks with small values of porosity. For rocks with porous shale the correlation coefficient between acoustic impedance and shalines can be higher than correlation coefficient between acoustic impedance and porosity. In this case the shale fraction of rocks is a carrier of porosity. This fraction controls distribution of acoustic impedance values at the physical level.
The prognosis of the clay rocks zones with increased porosity was done. For solution of this task the 3D seismic data is used. The total area of investigations is about 200 square kilometers. The geophysical data obtained from three wells at the investigation area are used as well. Constructed model of rocks physical property coincides with drilling and testing data in these wells. Geological section of this area is characterized by high amount of clay rocks and small amount of sandy layers. These sandy layers have not industrial flow rate of hydrocarbons.
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Statistics of Trace Element Concentration in Oils, New Evidence for Naftidogenesis
Authors M.V. Rodkin and S.A. PunanovaSummaryTrace elements (TE) composition of oils provides an important information on process of naftidogenesis. The TE composition of different caustobioliths (oils, coals, combustible and black shales) is compared with the chemical composition of organic matter and the upper, middle and the lower continental crust. The TE content of coals and shales correlates better with the chemical composition of the upper crust, whereas oil TE content from all oilbearing provinces (except Kamchatka) correlate better with the lower crust. Wherein, correlation betwen oil TE and organic matter is high, but often weaker than with the composition of the lower crust. Unlike all other oil provinces, for Kamchatka both oils and hydrothermal waters TE compositions better correlate with the upper or middle crust.
The results are treated within the framework of the scheme of a flow-through nonequilibrium reactor, when the buried organic matter is the main source of oil hydrocarbons, but for massive oil formation, it is necessary to work out the sedimentary strata with an upward fluid flow bearing a TE mark of the depth of its formation. Under intense thermal regime of Kamchatka, dehydration processes occur at shallower depths, which explains the difference in the character of correlation.
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Results of the satellite images frequency-resonant processing of the search block in the Barents Sea in the area of drilled well 7435/12-1 Korpfjell
Authors S. Levashov, N. Yakymchuk, I. Korchagin and D. BozhezhaSummaryThe results of the assessment of the oil and gas potential of four areas of 3D seismic works conducting in the Norwegian part of the former “gray” zone of the Barents Sea are analyzed. Experimental studies were carried out using the frequency-resonance method of processing and interpretation of remote sensing data (RS). The total area of the surveyed blocks is equal to 39742 km2, and the area of 3D seismic works within them is 13956 km2. In 2014, two anomalous zones of the “gas reservoir” type and 13 anomalous zones of “gas + condensate deposit” type with a total area of 1613 km2 were detected and mapped within the surveyed areas. In 2017 within one of the surveyed sites a 7435/12-1 Korpfjell well with a depth of 1508 m was drilled, in which no commercial deposits of gas were found. In January 2018, a satellite image of the local well site location was processed on a larger scale. Analysis of the results of frequency resonance processing of satellite images of the drilling site in 2014 and 2018 shows that the drilled well 7435/12-1 Korpfjell is not in the optimal location.
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Operative detection and mapping of the free methane accumulation within the mine fields by geoelectric methods
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D.P. Gunya and D. BozhezhaSummaryThe practical experience of experimental application in 2009 of direct-prospecting geoelectric methods of forming short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS) (FSPEF-VERS express-technology) on the local area of coal mine in the Donbas region are given. The six anomalous geoelectric zones of gas (free methane) type were revealed and mapped on investigation area by FSPEF method survey. The bedding depths and thicknesses of the anomalous polarized layers (APL) of gas type were determined by VERS sounding. The optimal places for the degassing borehole locations were delineated on measurements data by the FSPEF-VERS methods. The application of the FSPEF-VERS technology can promote for increasing the efficiency of existing technology of the coal mine methane capturing and utilization.
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Magnetic studies at Koroleve and Staniv gas fields in Transcarpathian depression of Ukraine
Authors R. Kuderavets, O. Menshov, I. Chobotok and V. TymoschukSummaryThe prime idea of the present study is to attract new data for the magnetic survey and soil magnetism application in oil and gas prospecting. We need to find the genetic relation of the anomalous magnetic field and hydrocarbon accumulation at the areas of compound geological structures. We performed the magnetic measurements in the Transcarpathian depression of Ukraine. We identified significant magnetic anomalies caused by the volcanic Vyhorlat-Huta range. This situation greatly complicates the analysis of the structure of the magnetic field. The observed anomalies assume the effect of the hydrocarbon. Hydrocarbons change the structure of the anomalous magnetic field. We registered the negative magnetic anomalies with a width of about 1000–1500 m and amplitude of more than −10 nT. We infer the need of information of the block structure reflection’s in the region and the influence of the volcanic-sedimentary rocks. The soil of the Transcarpathian depression is weakly magnetic and contain large amount of the paramagnetic material. We performed several magnetic mineralogical analyzes to define the nature of the soil magnetic signal. The primary magnetic mineral is magnetite. Moreover, we observed the admixtures of the high coercetivity minerals, probably pedogenic hematite or goethite.
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The compressibility research of the West Ukraine rock-collectors for oil and gas predicting by theoretical-empirical technique
Authors L. Skakal’s’ka and A.V. NazarevychSummaryThe theoretical-empirical tecnique is created as a complex mathematical apparatus by using the parameter of the compressibility of rocks as the key in calculations. It is based on an adequate mathematical model of solid porous rocks, empirical relations between elastic and collector characteristics of rocks and data of acoustic logging in the opencast of wells. The parameter of the compressibility is tested for getting the best prognosis result.
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Forecasting new deposits of the hydrocarbons on the territory of the Sribnyanska depression by STAGR
Authors I.D. Bagriy, V.A. Glon, K.M. Starodubets and Yu.K. GordieievaSummaryPerformed comprehensive studies of the Sribnyanska depression have been carried out conducted systematic analysis of geological structurally-thermo-atomichemical research of oil and gas prospective objects of the Dnieper-Donets Rift. Executed interpretation and synthesis of the data. Based on the distribution of the STAGD criteria, prospective areas for the search for hydrocarbons within the Sribnyanska depression are identified.
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Identification of low permeability zone based on well log data within Lower Carboniferous strata (DDB)
By O. TunikSummaryCarboniferous strata is referred to the interval where unconventional oil and gas deposits can be formed. They controlled by the high temperatures and pressures which influence secondary alterations in seal and reservoir rocks. Meanwhile this zone is characterized by abnormal pressure occurrence so its further prediction is important to avoid unexpected accidents during exploration and production works on the well site.
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Analysis of electrical and filtration properties anisotropy of the compacted reservoir rocks of Moscovian stage (West- Shebelynska area)
Authors I.M. Bezrodna, V.V. Antoniuk and A.V. ShynkarenkoSummaryThere are presented the results of qualitative assessment of electrical and filtration properties anisotropy of the compacted reservoir rocks of Moscovian stage (West-Shebelynska area) from the depth interval 4929 — 5380 m. Coefficients of the anisotropy of gas permeability and electrical resistivity were determined using the results of petrophysical studies of core samples along two orthogonal directions. Fractioned samples and samples without vertical filtration of fluids were determined and correlations between vertical and horizontal permeability were established. Horizontal permeability, effective porosity and mean hydraulic radius of core samples were determined to be most suitable to assess the vertical permeability.
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Determination of parameters of acoustic and elastic anisotropy for studying texture of rocks of Pischans’ka structure
Authors D.A. Bezrodnyi and V.V. SvystovSummaryPischans’ka iron structure is a unique natural geophysical phenomenon of Ukraine and is clearly distinguished in natural potential fields with almost isometric anomalies of magnetic and gravimetric fields. However, as far as the nature of this phenomenon is concerned, there is no definitive idea yet. Since the Pischans’ka structure breeds during their existence were affected by tectonic deformations, an attempt was made to study their stress-strain state according to the seismic acoustic research method
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Hydrogeochemical database of reservoir waters of oil fields in the Eastern region of Ukraine as the first way to the effective using prodused water
Authors M.V. Reva and D.F. ChomkoSummaryThe article deals with the use of reservoir waters as valuable raw materials. The article describes the main geochemical properties of the reservoir waters of the Eastern oil and gas region of Ukraine. The authors define boron, magnesium, lithium, potassium, iodine and bromine as the main valuable components in the prodused water. These components are the main criteria for creating a database. The article defines a number of criteria which should be guided when creating a database, for the purpose of rational use of the prodused water.
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GIS application in assessment of mineral recourses in Libya
Authors Wadi Munira and O. IvanikSummaryMineral resources information, along with the geologic, geochemical, and geophysical information needed to understand and assess mineral resource potential. The aim of this work is studying the mineral resources information in Libya by capturing on a computer-based geographic information system (GIS). The aim of designing the mineral resources geodatabase is to provide spatial and non-spatial information on mineral deposits; developed database contains all available information concerning mineral resources in Libya. The distribution, structure and formations of ore deposits has been analyzed. Criteria for ores deposits recognition in Libya has been defined. There is a spatial and temporal association of ore deposits location with extensional tectonics. Many of the deposits are elongated parallel to regional or local structural trends.
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Analysis of approaches to create the system of estimation and prediction of the quality of surface water using GIS
Authors L.V. Plichko and V.I. ZatserkovnyiSummaryThe questions of approaches to the creation of a system for estimating and predicting the quality of surface waters using geoinformation systems (GIS) are considered. Based on the results of the analysis, a database of surface water quality monitoring was created, which allows to assess the overall picture of pollution. Consideration of this problem opens the possibility of practical solution of many tasks to protect the population and the environment from the effects of dangerous pollution of surface water.
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Using cartographic internets-services in the development and popularization of AES
More LessSummaryCreation and support of cartographic online services GIS can serve as a great start to energy independence of the country. As they visualize the information on the conditions, factors, resources, status and prospects of AE development, covering territorial units of different rank, and designed to provide industry development planning, rational and efficient use of AES. The availability of these data is due to the fact that they are available free of charge on the Internet and are available to individuals and legal entities, public associations and public authorities. Creation of online maps with accessible information about the prospects of development of AE for the whole of Ukraine, in the form of cartographic Internet-service, as Odessasolar, is an actual task of the state level.
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Creation of the database of spatial data of the natural reserve fund of the Odessa region
Authors O.I. Pylypenko and V.I. ZatserkovnyiSummaryIn the article the main approaches to the use of geographic information systems and technology to create a database for the nature reserve fund are considered.
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Modern development methodologies for GIS oriented web application
Authors V.K. Demidov, O.I. Pyvovar and Y.G. KravchenkoSummaryIn this abstract demonstrate way use modern methodologies benefits and instruments in development for GIS oriented application. Example application based on source data provided from monitoring of atmospheric pollution. Main idea organized workflow which help as soon as possible develop application prototype, demonstrated it to client, receive feedback and apply changes.
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Problem of modern transport systems and its structural elements
Authors O.V. Kobrin, V.I. Zatserkovnyi, P.D. Krelshtein and L.V. TustanovskaSummaryModern large cities and megalopolises are constantly facing transport problems that require finding the right, automatized solutions. Difficulties connected to the admission of high-intensity traffic flows increase through a large number of pedestrian flows. Increasing the number of individual cars and changing the structure of the city causes on top environmental problems and problems of road condition and quality.
The main instrument of traffic management is colour light signaling, designed for the first pass of road users through a certain section of the UDM, and also for determination unsafe sections of streets (roads). The structure of modern automatized traffic management systems (ASM-T) is built on the hierarchical principle of information processing, which while identifying the total management system should operate, foresees the allocation of several mutually subordinate management levels: local, zonal, district, citywide.
Transport models based on modern information technologies are powerful computational software complexes that, based on the functional and spatial characteristics of a city, together with all existing data, calculate the most likely distribution of transport and passenger flows by of the street-road network (UDM).
Effective resolution of transport network problems is to be solved with the help of geo-information analysis and geo-information modeling, namely through building a transport model of the city with the help of geo-information systems.
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The influence of geophysical factors on air temperature in Antarctica
Authors V. Bakhmutov, N. Kilifarska and G. MelnykSummaryThe analysis of the created distribution maps of the geomagnetic field and the atmosphere characteristics allowed us to developed a model that adequately explains the changes in the current Antarctic temperature – simultaneous “heating” in the west and “cooling” in the center and in the east. It is a chain of cause-effect relationships: the geomagnetic field – the flux of solar protons – the concentration of ozone – the temperature and humidity near the tropopause – the surface temperature. The reduced intensity of the geomagnetic field in the Western Antarctica results in a systematically low concentration of ozone and increased humidity on the tropopause, which facilitates the retention of long-wave radiation from the Earth in the troposphere due to the greenhouse effect and an increase of the surface temperature. The increased intensity of the geomagnetic field and ozone concentration in the Central and Eastern Antarctica cause an increase in temperature and a decrease in humidity at the level of the tropopause, which does not prevent the penetration of long-wave radiation from the Earth upwards and causes cooling of the lower troposphere. Taking into account the geomagnetic field as a factor of influence on the climate allows us to adequately explain the found differences in Western and Eastern Antarctica.
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Monitoring of geomagnetic induction vector
Authors V.I. Babak and I.I. RokityanskySummaryOne of the goals of geoinformatics is the creation of databases of geophysical fields observations and calculated from them response functions of the Earth. International database “Intermagnet” keeps values of geomagnetic field since 1991 measured at world-wide network of geomagnetic observatories. From these rough data the induction vector C (one of response functions of real Earth to applied geomagnetic field) has been calculated for all observatories for all years presented in “Intermagnet” that constitutes new database with time reading 1 day and 1 month. C carry information on electrical conductivity anomalies in the Earth’s interior and their temporal variations. Scientific part is concentrated on annual and 11-years C variations analysis.
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3D thermal model of the Trøndelag Platform, Møre and Vøring basins (the Mid-Norwegian continental margin)
Authors Y.P. Maystrenko and L. GernigonSummaryA 3D temperature distribution beneath the Trøndelag Platform, the Møre and Vøring basins of the Mid-Norwegian continental margin and adjacent areas of the continent has been obtained based on the recently constructed lithosphere-scale 3D structural model of the studied region. There is a clear correlation the between the major tectonic elements of the continental margin and the modelled temperatures, showing an increase of the calculated temperatures from the continental lithospheric domain towards the oceanic one. The modelled temperature is highest within the Vøring Basin where a thermal insulation of the sedimentary cover increases the heat storage within the areas where low thermally conductive sedimentary rocks are relatively thickest. The Møre Basin is represented by lower temperatures compared to the Vøring Basin where the sedimentary cover is the thickest one. The Trøndelag Platform is characterized by even lower modelled temperatures, reflecting a fact that this area was less affected by crustal thinning and has thinner sedimentary infill. The modelled temperatures are representative for the subsurface regional-scale 3D conductive thermal field and show a general good fit with the temperatures measured in the available wells.
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Numerical and Laboratory Examinations for Digital Rock Modeling for Clastic Oil and Gas Reservoirs
Authors V. Berezovsky, I. Belozerov, M.G. Gubaydullin and A. Yur’evSummaryPetroleum well cores examinations are among the most costly stages of development of oil and gas. And even a partial its replacement by the numerical experiments can provide significant economic benefits. 3D-reconstruction of the core microstructure can be considered as a cheap and least timeconsuming method for obtaining petrophysical information about the main filtration-capacitive properties and fluid motion in reservoir rocks. One of the promising approaches to build the mathematical model of the macroscopic properties of porous media and for the 3D-reconstruction of the rock microstructure is the method of molecular dynamics. This work presents the results of numerical calculations and their comparison with the full-scale examination.
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Density modeling of the south-eastern part of the Fennoscandian shield using GIS Integro
Authors N.V. Sharov, N.N. Pimanova and V.A. SpiridonovSummaryWhen studying the deep structure of the southeastern part of the Fennoscandian shield, maps of the topography of the Moho surface were clarified. The depths of this surface on maps and sections of GSS profiles were compared. Discrepancies (up to 8 km) were taken into account in the construction of the consolidated map. To correct the position of this surface in the space between seismic profiles, an approach using the analysis of 3D distribution of density inhomogeneities in the earth’s crust and upper mantle.
The results of 3D density modeling for a two-layer model (earth’s crust-upper mantle) made it possible to determine the position of large blocks with different density in both of the layers.
2D inverse gravitatione problem solution in block model along the seismic profile of the Baltic sea under the assumption of lateral heterogeneity of the mantle made it possible to obtain more realistic densities for the lower crust of the Svekofennian folded area and for the upper crust of the Karelian block.
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To the issue of the border kinematics of the adjacent plates
More LessSummaryThe relative motions of lithospheric plates are traditionally regarded as spreading, subduction and transform. Surveying data show a much greater variety of combinations. Purpose of the work is to identify the complete set of possible relative movements of plates. A new methodological approach is used. It consists in the fact that it was analyzed the movement of both plates relative to their border. This approach required additions to the structural-geological terminology. It made possible to formalize the orientation of the plate movements. 8 variants for the movement of the plate relative to its boundary were selected. In combination with eight of the same variants of the opposite plate motion, 64 combinations are obtained. There are 36 unique variants of combinations. 8 of them are well-known, 4 reflect the variants of displacement of inactive boundaries, and 24 are new to geodynamic theory. For 18 new variants, areas of their modern implementation in different regions of the world are shown; 6 more variants have not been found yet. The obtained result allows us to proceed to the analysis of interaction of multidirectional mantle flows.
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Electromagnetic studies of the central part of the southern Dnieper-Donets Basin slope
Authors A.M. Kushnir, V.A. Ilyenko and V.B. DzhaoshviliSummaryThe simultaneous MT/MV studies were carried out along the Neseno-Irzhavets-Abramovka profile to study the deep structure of the lithosphere to search for electrical conductivity anomalies that may be caused by the fracturing of the rocks through which the fluids migrate and possibly create hydrocarbon deposits. The new modern experimental electromagnetic parameters described in this paper should detail the Kirovograd electrical conductivity anomaly and become the basis for the three-dimensional model construction in such complex geological environment as uneven-aged structure junction. The described experimental MT/MV observations confirm the deep anomalous structures that investigated in the previous years.
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Geoelectric researches of the Tarasivka structure of the Golovanivsk suture zone
Authors A.M. Kushnir, T.K. Burakhovych, V.A. Ilyenko and B.I. ShyrkovSummaryAccording to the results of 3D modeling, the Tarasivka structure is fragmentarily manifested as a low resistivity, the conductive zones with different resistivity cross it in a sublatitudinal direction, in which the lowest values from 10 Ohm⋅m in the south to 100 Ohm⋅m in the north are in its contour. In the vertical section it can be represented in several layers: the first one is the conductor with ρ = 10–250 Ohm⋅m — from the surface to 10 m −100 m, most likely linked not only with high electrical conductivity of surface sediment deposits, but also with the zones of disintegration of rocks of the basement; the second - a high resistivity layer with ρ = 10000 Ohm⋅m — from 100 m to 2 km, possibly it is represented by the uniform non-differentiated thickness; the third layer is the electrical conductor with ρ = 10–250 Ohm⋅m from 2–3 km to 10 km, probably linked with the special composition of the earth’s crust at these depths (graphitization, sulfidization, etc.) or fluidization of different origins, more often it is considered according to the modern data that the nature of the conductive anomalies is the result of the joint influence of the electron and ion types of electrical conductivity.
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Local features of the gas volcanism and regional deep hydrocarbon system in the Shenhu area (northern continental slope of the South China Sea)
Authors V.D. Soloviev, I. Korchagin, S. Levashov, N. Yakymchuk and D. BozhezhaSummaryNew anomalies of “gas hydrates reservoir and gas deposit” types in the drilling Shenchu area (South China Sea) were revealed by the frequency-resonance technology of the satellite images processing and decoding. The local area with very high reservoir pressure values of 67 MPa – possible vertical channel for deep gas bearing fluids migration – was detected. Diapers and mud volcanoes can have deep roots in the form of disturbances and fracture zones at the base of the sediments and near the basement. They may be connected both with deep sources of thermogenic methane and with shallow biogenic hydrates, since the nature of the occurrence of gas hydrates indicates their migratory character. Thermogenic gas in local structures of the Shenhu area possibly connected with vertical and lateral fluid pathways from a depth of 5 – 15 km, where the favorable conditions for the intermediate reservoirs of the abiogenic methane are existing. The obtained results confirmed the presence of the regional hydrocarbon system in local features with gas hydrates in their structure, which formed here in process of gas emanating along lateral fluid pathways from mud volcanoes and diapers with deep roots.
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Information support of works on forecasting and development of sedimentary formations useful minerals
Authors D.P. Khrushchov, E.A. Remezova, M.S. Kovalchuk and T.V. OkholinaSummaryInformation methodological set of prognostic paleoreconstructive retrospective-static modeling with the subordinate and supplementing methods of digital structural-lithological modeling and comprehensive ecological-geological modeling are presented as an unified multi-purpose methodology (developed up to the functional level of technology) of information support for R&D, connected with various directions and kinds of works aimed at geological medium use and protection.
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Geological position and age of Argentine Islands mafic dykes, West Antarctica
Authors L. Gavryliv, O.V. Mytrokhyn, V.G. Bakhmutov and A.G. AleksieienkoSummaryBased on the recent field geological research combined with previous isotopic datings, it is shown that numerous mafic dykes, occuring among the Mesozoic-Cenozoic igneous rocks of the Argentine Islands and the adjacent territory, are formed during at least two stages. The Mesozoic stage of dykes formation is represented by the Cretaceous dykes of porphyritic microgabbros and microdiorites, which intrude the orogenic formations of the UJVG. Although, it is impossible to exclude the presence of even more ancient dykes genetically associated with UJVG. The Cenozoic stage, apparently, includes the dykes of several age groups. Among them, a significant place is occupied by the youngest dykes, which intrude the Cretaceous-Paleogene granitoids massifs after their final exhumation. The presence of such dykes indicates that magmatic activity in the region did not ceased in the Neogene, and possibly in the Quaternary. The subvolcanic features of these dykes allows to raise the question of finding coeval volcanic formations with the same age.
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Assessment of the quality and reserves of graphite of the South-Eastern area of the Zavalevsky deposit by block modeling
Authors V. Demidov and I. BersymSummaryThe paper presents the results of the analysis of carbon graphite content with the identification of the most high-quality ore-bearing zones for North Zone (the South-East area) of the Zavalivsky deposit. The authors give an analysis of the ore deposit of graphite gneisses according to data testing during exploration works of 1971—1982 years, taking into account the degree of working areas. In particular, 2514 ordinary samples were analyzed for 121 wells. In addition, the total amount of graphite ore reserves was calculated by the block modeling method and a comparison with the classic reserves calculation was carried out — by the section method. The block model of the ore bodies within the wireframe model using the interpolation by the inverse weighted distances method (IDW) was used to estimate the reserves.
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Spatial modeling of lithosphere velocity of Kirovograd block of Ukrainian shield by the deep seismic sounding data
Authors I. Pap, I. Virshylo and I. HudilinSummaryThis research is devoted to the construction and analysis of a correct 3D velocity model in the lithosphere in the territory of the Ukrainian Shield of the Kirovograd ore region. Results of deep seismic sounding, presented by 5 profiles of submeridional and latitudinal direction, were used as the input parameters for the model. 3D Volumetric velocity modeling was provided by the different approximation methods taking into account known geological data.
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Danish North Sea Exploration Potential
Authors I. Virshylo, L. Podoliako, Y. Bilous, K. Yahorlytska, J. Kravchenko and B. RudnykSummaryIn this papers is considered the possibility to define plays and prospects using 3D seismic data with 2 extended 2D lines, 4 wells with associated data and report about drilling well. All the information were provided by organizers to the team from Institute of Geology (Taras Shevchenko National University of Kyiv) to participation in semifinal competition Imperial Barrel Award 2018. Based on this information we consider this basin perspective due to fair maturation of Lower Jurassic and Upper Jurassic high quality source rock – predominately in oil window. In this work were defined 4 plays with the moderate-to-good chance of success. In this area were identified 5 prospects and 1 lead with calculation of risked reserves.
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Modeling Permian sediments erosion in the Dnieper-Donets Basin
Authors I. Streltsova and I. VirshyloSummaryThe aim of this study is modeling Permian deposits erosionof the Dnipro-Donets depression. The Perm system is characterized by intensive tectonic and climatic changes, that influenced paleodepositional environment. Permian deposits are represented only in the Asselian, Sakmarian and Artinskian stages in the Dnieper-Donets Basin. Deposits of the Guadalupian and Lopingian series are eroded. The Permian system is represented by terrigenous sediments, which gradually changed by homogenic, and then eroded. Schlumberger software PetroMod 1D was used for simulation. As a result, three burial history models were obtained. Each model reflects different intensity and time when erosion occurred. The most likely model was chosen based on the history of the basin development.
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Investigation of deep electric conductivity of the Sivas through
More LessSummaryModern experimental researches on the study of the natural low-frequency electromagnetic field of the Earth with the use of modern equipment, processing of their results based on universal program packages and interpretation (including on a qualitative level) can provide detection of electric conductivity anomalies and the research of the deep structure of the Earth’s crust and mantle. The deepest point of the MTS village Ridne characterized by complex geological-tectonic structure and located in the northern part of the Scythian Plate, in the Sivas through between the Chongar and Melitopol-Novocaritsyn defective zones. The qualitative interpretation of the depth curves of the MTS indicates the possible presence of a conductor with a boundary of the upper edge of 50–100 km and S about 3000–5000 S. The total longitudinal conductivity of the sedimentary layer along the ascending branches ρa reaches over 400 S. The length of observation in the field is systematically substantiated. points of the MTS for the Sivas Through region and it is concluded that in order to obtain the curve ρa with stable S and H, the duration of observation should be no less than three days, while for S component it will be enough for one day.
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Kyiv landslides database developing, and its usage for statistical analysis
More LessSummaryThe report presents the database created by the rapporteur with the corresponding attribute table of registered and registered shifts within Kyiv. Shifts that previously had an address binding were recorded in the coordinate plane. This made it possible to conduct spatial analysis of the recorded negative phenomena in relation to existing buildings and structures. The results of spatial analysis of landslides within the boundaries of Kyiv, taking into account buffer zones, are presented. The analysis showed that about 150 buildings are located in the thirty-meter zone from the fixed and registered shift hazardous zones. About fifty streets are under threat of destruction.
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Study of the series of data of groundwater levels with passes
Authors M. Tymkiv, D. Kasiyanchuk, V. Danyliak and M. LevitskaSummaryOne of the main problems in working with these levels of groundwater is the incompleteness of the series. In this articl we consider the methods of filling the series of data of groundwater levels that have spaces. Correct filling of such series allows to characterize quantitatively the process of formation and change of hydrogeological conditions in time.
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Hydrodynamic regime of cave lakes and seismicity of Podillya (Ukraine)
Authors K. Bondar, M. Baryshnikova, A. Sachko, I. Tsiupa, V. Udovichenko and V. ApostolyukSummaryThe paper is devoted to the analysis of the series of water level monitoring observations in the Neogene gypsum startum of Podillya and to identification of the main factors determining the hydrodynamic regime of lakes in the caves of Mlynky and Ozerna. An attempt has been made to establish a connection between fluctuations in underground water levels with meteorological conditions on the surface and modern seismic activity.
For this purpose, the mathematical simulation of underground water level fluctuations was performed utilizing average daily air temperatures and precipitation, with subsequent comparison with the data of regime observations of water levels in cave lakes. Mapping of modern local earthquakes against the background of neotectonic activity and their spatial and temporal analysis was done.
The correlation of the simulated water level with actual measurements in the caves of Mlynky and Ozerna in the period from 2006 to 2014 and the difference in the period 2015–2017 is established. It was shown that a series of local earthquakes in 2012–2014 at the area of Mykulyntsi-Ternopil morphostructural-neotectonic node could have caused falling water content in the Neogene gypsum aquifer of Podillya in 2015–2017, as the seismic activity provoked opening of fractures in rocks and the absorption of water.
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On one integral criterion of reliability of geoinformation
Authors H.H. Guliyev, S.J. Akbarov, N. Yahnioglu and Y. SevdimaliyevSummaryA method of studying the problems of natural oscillation of a composite sphere is developed. Various variants of the composite sphere are studied considering preliminary deformation. The obtained results are necessary for further improvement of one of the integral criteria (periods of natural oscillations of the Earth caused by the strongest earthquakes) of the reliability of geoinformation.
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Modeling of filling process of the gas cap of geosoliton field
Authors M.V. Lubkov and O.O. LevchenkoSummaryOn the base of combined finite element — difference method, we carried out computer modeling of the filling process of gas cap of geosoliton field. According to obtained data analysis, filling process of the gas cap essentially depends on filtration parameters of considering porous reservoir, its size and characteristic fiches of the filling origins. Filling gas cap velocity mainly determined by origins power and less depends on their sizes and quantity. At the case of equal power origins, the filling gas cap velocity is proportional to the power of these origins. At the case, when different power origins act, the filling gas cap process passes irregularly. At the initial stages of filling process, excess pressure reservoir places closely correlate with origins installation. In the subsequent stages of filling, the pressure gradually aligns in all reservoir places and then regularly increases. As calculations show, regular filling of all gas cap region comes approximately over one hundred years since beginning of the process.
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Algorithm of modeling of acoustic monitoring of composite hierarchical inclusions
Authors O. Hachay, A. Khachay and O. KhachaySummaryA new method for modeling acoustic monitoring of a layered-block elastic medium with composite inclusions of various physical-mechanical hierarchical structures was developed. An iterative process for solving the direct problem is developed for the case of two hierarchical inclusions of l, m-ranks based on the use of 2D integro differential equations. The degree of hierarchy of inclusions is determined by the values of their ranks, which can be different. Hierarchical inclusions are located in different layers above each other: the upper is anomalously plastic, the second is anomalously dense. The degree of filling inclusions of each rank for all three hierarchical inclusions is different. The results of the simulation can be used to provide monitoring studies of the stability of the rock massif during its development by mass explosions followed by rocks laying.
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Difference between phase and group angles in ORT media
Authors A. Stovas, Y. Roganov and V. RoganovSummaryWe derive difference between phase and group angles in ORT media which is important for AVO/AVA problem. The difference between phase and group velocity vectors is also derived.
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Modeling of oil filtration processes in the vertically heterogeneous reservoirs
By M.V. LubkovSummaryOn the base of combined finite element - difference method, we carried out computer modeling of the oil filtration processes in the vertically heterogeneous reservoirs. According to obtained data analysis, the efficiency of reservoir oil production process in the three phase vertically heterogeneous medium (water, oil, gas) mainly depends on reservoir oil filtration parameters distributions, oil penetrating reservoir border conditions and essentially on the oil-saturated concentration reservoir places localization. Intensity of the oil producing process is defined by the area of decreasing oil reservoir pressure in the vicinity of acting bottomhole. The larger this area the more intensive oil producing process goes. Therefore the effectiveness of oil producing process in vertically heterogeneous oil accommodating reservoirs directly depends on accuracy of the oil-saturated concentrated places localization and respective installation of the acting bottomhole.
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The statistical simulation algorithm of random fields on the sphere by the aircraft magnetometry data
Authors Z. Vyzhva, V. Demidov and A. VyzhvaSummaryIt is proposed to apply statistical simulation methods of r of random field ealizations on the sphere, to solve the problems of conditional maps, adding of data to achieve the necessary precision, and other such problems in geophysics. The approximation theorems and built on their base algorithm of statistical simulation of Gaussian isotropic random fields on the sphere using the spectral representation was considered. Model example — the aircraft magnetometry data on the great area. It is divided into deterministic and random components for data analysis. The deterministic component is proposed to approximate by cubic splines and the stationary random component is proposed to modeling on the basis of spectral expansions of random fields on the sphere.
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Numerical modeling of hydraulic fracture permeability in viscoelastic rocks
By B.P. MaslovSummaryHydraulic fracturing to exploit hydrocarbons resources has been often used for the last decades. So it is very important to create computer models to simulate these very complex and practically useful phenomena. The new microstructural approach proposed to estimate permeability and to analyze the fluid transfer in porous isotropic nonlinear viscoelastic medium. Numerical Carson and Fast Fourier (FFT) integral transformations for the viscous effects estimation in zone of local stress concentration near grains and pores are used.
The analytical solutions and numerical algorithms for the prediction of viscoelastic creep and relaxation functions are proposed for the case of the multi-media with complex microstructure. Influence of the tri-axial stress state on the local parameters of creep deformations and effective permeability is evaluated. Deformation, permeability and fracture of natural geological materials such as limestone, granite, and soil are very influenced by the presence of micro-defects and porosity, which can cause inelastic effects even in purely hydrostatic load. A network of micro-cracks leads to low strength in the absence of external pressure, significant nonlinear elasticity, and sensitivity to the loading rate. Some examples of numerical modeling are presented. Permeability coefficients and fracture parameters obtained in laboratory experiments are compared with prediction results.
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Neural networks technologies in oil and gas well logging
By O. KarpenkoSummaryThe artificial neural network (ANNs) is an effective tool for making empirically grounded decisions in cases where either the mathematical model of the research object or the process theory is absent or underdeveloped. Every year there are increases the number of investigations on the use of ANNs technology in the oil and gas well logging. Application of ANNs technology in the well logging of complexly constructed, thin-layered sections is a very promising direction for increasing the efficiency of qualitative and quantitative interpretation of geophysical data. The main directions of the implementation of ANNs in the well logging are: 1. Creation the synthetic curve of the geophysical parameter, if it is absent for any reason among other geophysical data. 2. Evaluation of capacitive-filtration characteristics of rocks in a well section with the using of the created ANNs. 3. Detection the rocks-reservoir and determination of their saturation in the sections of wells on the basis of original algorithms using ANNs. 4. Improvement of the resolution of the curve of the geophysical parameter on the basis of the created model of ANNs.
The conservatism of traditional approaches to the interpretation of geophysical data restrains the wider use of neural networks in practice.
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