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15th EAGE International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: May 10-13, 2016
- Location: Kiev, Ukraine
- Published: 10 May 2016
21 - 40 of 94 results
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Geophysical and engineering methods in the study of the pipeline systems
Authors R. Hloba, O. Danylov, S. Korneyenko and Y. HlobaSummaryIt is proposed to apply a set of geophysical methods to engineering surveys when designing and operating linear underground constructions within pipelines. A new method of resonance acoustic profiling being integrated in conventional electrical methods, will enhance the validity of the research data. The study allows for identifying the areas best fitting for laying and operating the pipeline transport system. The paper provides a complex of geophysical methods to guarantee safety standards on the pipeline transport systems when affected by natural and anthropogenic hazards. The study of resonance acoustic profiling will provide data on geological sections, landslide areas mapping, rockfalls, water intrusion, water-bearing horizons, zones of tectonic disturbances and karst cavities. The electrical methods allow for determining probable areas of corrosion sites on the pipeline transport systems: VES (vertical electrical sounding), “remote electrode” (electrometric survey), measuring potential gradient and SEP (symmetrical electrical profiling), in particular.
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Agent-based model of data actualization of online region sustainable development atlases
Authors B. Busygin and A. KachanovSummaryThe paper looks at the problems of automatic collecting and processing the data for electronic atlases. Agent-based model is proposed to solve the problems of searching for the new data and populating the databases from the diverse sources automatically. The proposed multi-agent system for data actualization is described and its subsystem functions are explained.
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Petrophysical thermobaric model of the Eearth’s crust of the Black sea North-Western part along a 25 DSS profile
By V. KorchinSummaryThe new hypothesis of education, existence and disappearance of low velocity zones (LVZ), discovered the DSS method as elastic anomalies of the Earth’s crust is presented in the article. The difficult changes of VP,S=f(PT) for rocks are experimentally set up (regions of velocity inversion are revealed). Zones arise in cases, when at corresponding depths, the temperature gradient exceeds the certain threshold, and the pressure cannot compensate the disturbance of rocks caused by temperature actions. The presence of low velocity zones is the objective reality and they can be everywhere in the Earth’s crust. Their power can be increased with the increase of intensity of thermal regimes or it will disappear with lowering of heat in a lithosphere. In the offered work on the basis of study of connection of interstitial space with the longitudinal waves propagation velocity at high pressures and temperatures in the Ukrainian shield granites samples an attempt more fully to describe a change porosity and fractures of rocks depending on P and Т influence of different depths is carried out, to explain some crust anomalies of rocks unpacking, which can be conductors of migration and localization of deep origin hydrocarbons.
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Experimental investigations of density and velocity characteristics of gneises at high pressures and temperatures
Authors E. Karnaukhova and V. KorchinSummaryElastic-density characteristics of gneises with a depth change on nonlinear laws. The experiments show that the VP=f(H) and p=f(H) dependences have complicated regularities: on the curves velocity and density inversion zones with maxima and minima manifestation are marked. It was shown that rocks differentiation on elastic-density parameters in probed varieties of gneises in laboratory conditions at the atmospheric pressure and room temperature and at the simultaneous influence on samples of deep PT parameters depends on the percentage content of high-density pyroxene and amphibole, and also stratified biotite. These materials enabled to complement and correct before the known information about “velocity-density” dependence on different depths, widely use at a seismic-gravity modelling.
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Uncompression zones of rocks of thermodynamics nature in the earth’s crust of Ukrainian shield central part
Authors V. Korchin, P. Burtnyi and V. KobolevSummaryLongitudinal waves propagation velocity waves and density of rocks depends substantial appearance on pressure and temperatures influence of which must be taken into account at the calculations of these parameters on different depths. From the data of thermobaric petrophysical seismic-gravity modelling the specified material cut of area of the Earth’s crust of central part of the Ukrainian shield is got. Found out the local areas of lowering of ricks density, which, as a rule, coincide with the area of low velocity zones and formed deep thermodynamic conditions. Such uncompression zones of mineral environment can serve one of diagnostic signs at the searches of mineral deposits.
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On solving the structural inverse magnetic problem of finding a contact surface in the case of arbitrary directed magnetization
By V. MisilovSummaryInverse structural magnetic problem of finding a contact surface between two layers with constant magnetizations was formulated for the case of arbitrary directed magnetization vectors. An effective numerical technique for solving this problem was proposed and implemented for multicore processors. Model problem with synthetic magnetic data was solved.
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The relationship between low-frequency magnetic susceptibility and heavy metals in soils of Odesa
Authors I. Stakhiv, I. Tsyupa and K. BondarSummaryThe results of studying relationship between low-frequency magnetic susceptibility and heavy metals (Cd, Mn, Cu, Ni, Pb, Zn) in soils of Odesa are represented in the paper. Actual data analysis shows, that the level of pollution in the city remains high. It is obvious firstly from the high values of magnetic susceptibility 300-625·10−8 m3/kg, and secondly from the high concentrations of metals - indicators of anthropogenic pollution (Cd, Cu, Pb, Zn). The content of these metals demonstrated significant correlation coefficients with low frequency magnetic susceptibility of soils. The map of spatial distribution of low-frequency magnetic susceptibility shows that southern and central parts of the city are polluted, a high values are mainly confined to highways and plants. Pollution load index is high (up to 4) for most points of the study area, thus the soil of Odesa are in poor conditions.
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Results of experimental electromagnetic studies of the Crimean region
Authors T. Burahovich and A. KushnirSummarySpatial-temporal pattern of distribution of geomagnetic variations and electric field on the Earth’s surface was obtained as a result of modern experimental observations conducted in 2007–2013 along 9 profiles (48 points) by the methods of magnetotelluric sounding (MTS) and magnetovariation profiling (MVP). These profiles cross various geological structures of the Crimean region. It is possible to estimate the value of electrical conductivity and vertical and horizontal geo-electric structure. The processing of these data is done using modern software system PRC_MTMV (author Varentsov Iv. M.) that provides the common noise-protected evaluation of the impedance, tipper and horizontal magneto-variation response according to synchronous MT/MV records. The main result of qualitative interpretation of geo-electric research is the detection of high conductivity regions in the Earth’s crust and upper mantle of the Crimea, that are characterized by the variations of conductivity, depth and configuration. They characterize the various geological structures differently. The sub-vertical conductive zones often coincide with the fault structures, most of these objects are confined to the suture zones between tectonic elements such as the East European platform and the Scythian plate, the Scythian plate and the Crimean mountain, North and South Kerch zone. This fact may reflect high permeability of the suture zones for deep fluids in the process of their formation.
Although the qualitative interpretation of the experimental data of magnetotelluric sounding (MTS) and magnetovariation profiling (MVP) provides inconsistent understanding of the depth distribution of the Crimean region electrical conductivity, the combination of these methods allows constructing the model of resistivity distribution within a three-dimensional environment much more accurately and adequately to the observed experimental data.
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Selection of the similar gidrogeodynamic mode zones within the Zhytomyr region with the tools of information and spatial analysis in GIS
Authors O. Pona and L. DavybidaSummaryThe question of distributing of crowd conditions of the cross-correlation connections between the mode of water-tables vibrations and sun activity on the territory of the Zhytomyr Region was considered and the maps which made it possible to set basic law conformities of these connections were created. Territorial homogeneity of the long-term groundwater mode was analyzed within territory of the Zhytomyr Region. The selection of the similar gidrogeodynamic mode zones within territory of the Zhytomyr Region was executed.
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Studying of modern flooding of southwestern part Krivbass by geophysical methods
Authors P. Pigulevskiy, V. Svistun, S. Slobodyaniuk and A. KyryliukSummaryThe results and methods of identifying and mapping areas of flooding by modern geophysical methods at the south-western part of Kryvbas are presented. On the basis of electrical properties of rocks data, a materials synthesis of engineering-geological conditions study and, above all, hydrogeological, and methods of optimum complex and methodic of geophysical studies were identified. To study the degree of flooding of the southwestern part of Kryvbas were used geoelectric methods in modifications vertical electrical sounding and natural field involving biolocation research and large-scale maps of the gravitational field. It was established that the zone of increased expressive horizontal gradients, which coincide with the natural deformation zones wide field or abrupt changes of apparent resistivity are regions of increased permeability of water. Aquifer in Quaternary sediments has planar spread with different levels of standing water. The separate areas with a natural (along rivers and large beams) and anthropogenic origin (dumps, quarries, tailing) are allocated. The level of capillary moisture is placed above the ground water level and, by our opinion, characterizes the depth of surface evaporation. Received information from results of electrometric and biolocation research is very important for solving agricultural problems - humidification control or depth of evaporation, as well as for administrative decision-making at various levels in order to minimize the effects of the activity of man-made objects (sludge storage tanks, reservoirs).
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GIS modeling of the groundwater levels to the intensive flooded areas (on the example of the Zhytomyr Region)
Authors Y. Bilinska and M. TymkivSummaryActual problems of development of the natural processes of flooding for the territory of Ukraine. The technique of regional groundwater level modeling based on geoinformation approach was created. The predictive modeling of the groundwater levels within the territory of Ukrainian Polissya was carried.
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Conductivity anomalies and mineral resources of the central part of the Ukrainian shield
Authors B. Shyrkov and A. UsenkoSummaryIt was discovered the different spatial orientation of the condactors in the central part of the Ukrainian shield to use the three-dimensional geoelectrical modeling. They correspond the sublatitudinal and submeridional superficial and deep conductivity anomalies. Involvement of the experimental results of magnetotelluric sounding (MTZ) and magnetovariation profiling (MVP), structure analysis data, geochemistry, mineralogy makes it possible to carry out the regional and local forecasting of the mineral deposits within the Ukrainian shield. It was established that low-resistance anomalies are confined to the areas of the metasomatosis to extend along the fault zones. are The most of the ore deposits, including Savran’ and Kapitanivka ore fields within the Golovanivsk shear zone and deposits of graphite, uranium, titanium, iron ore, lithium are localized within these limits.
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Development of geoportal of natural-reserve Fund of Ukraine
Authors V. Demidov and E. KravchenkoSummaryTo store large enough size of spatial data the development of geoportal is the best solution for the presentation of geodata and automatic report generation. The basic principles and technology of geoportal development for natural-reserve Fund (NRF) of Ukraine are presented in the paper. To create the geoportal the objects of national NRF has been inventoried and database of NRF in Ukraine has been actualized. The software solution to storage of large size of geodata, access and visualization was proposed. This solution involves the use of Open Source products such as PostgreSQL (with the extension PostGIS), GeoServer, and Apache, which minimizes the costs of developing of geoportal.
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Interpretation of high-resolution magnetic survey integrated in archaeological GIS (on example of Hotiv Scythian hillfort)
Authors M. Daragan, M. Orlyuk, A. Romenets and K. BondarSummaryAs a result of geophysical data interpretation, all anomalies, that can match archaeological objects on magnetic map of Hotiv Scythian hillfort, integrated into specialized GIS of this archaeological monument were localized. It was established that the total number of archeological objects that could be correlated with ground dwellings or dugouts (with already studied) on the area covered with geophysical survey and excavations does not exceed two dozen. Available data indicate poor population occupancy of the settlement in the 6th century B.C.
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A search for connections of gravitational influence of the Moon and the Sun with earthquakes of Carpathian region of Ukraine
Authors A. Kazantsev and L. KazantsevaSummaryIf there is an influence of the Moon and Sun on the occurrence of earthquakes, the physical nature of such influence can only be the gravitational. A possible gravitational influence is caused by the resultant tidal forces of the Moon and the Sun, but not by their separate actions. The calculations algorithm for the tidal forces of the Sun and Moon and for their resultant is described. Relative changes of these forces for different zones on the earth’s surface in time and at various depths are presented. Preliminary recommendations for searching of connections of gravitational influence of the Moon and the Sun with earthquakes was made.
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The analysis of the relationship between the phases of the Moon and the occurrence of landslides
Authors O. Pona, L. Shtogryn and D. KasianchukSummaryThe paper presents the primary statistical analysis of the coherence of extreme precipitation events with the phases of the Moon the length is 64 years, which allowed us to see the qualitative and quantitative relationship of periodic regularities in the influence of the Moon on the weather, in particular, on the formation of long-term anomalous precipitation, which in turn are a trigger for activation of landslide. It was revealed that the Prykarpattya in most cases, the abnormal rains in the last or first quarter Moon. The consistency of the frames, structures, spectra extreme precipitation taking into account the lunar phases and periods of activization of landslides indicates a possible link between them.
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Automated of calculation the corrections of radio logging for devices of the Soviet-Russian type
More LessSummaryAt one stage of data processing neutron logging in the calculation of porosity factor, there is a need to insert corrections for downhole conditions. “Geopoisk” provides a tool by means of which you can perform this task. However, problems lay in the fact that all algorithms were in the form of formulas, that is in a text file (code in the language “Gaosi” compiled module “Calculator”) which must be edited for correct calculations of particular cases, which is problematic for non-expert users without programming skills.
The aim of this work was to develop a dialog application that is integrated into the “Geopoisk”, which allows, by means of user interaction with its interface, to make settings for the calculation of correction factors, add them, and get a formula (code) without interacting directly with it.
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Creating of maps of investigation of spatial distribution of major chemical elements by electron probe microanalyzer and using it for understanding ways and sequences of crystallization fusion
Authors O. Loshakov and O. RybnikovaSummaryIn this article there was an aim to understand the way of crystallization a kind of granite from deposit of Zhytomyr region, Ukraine. According to the authors it can be proved after deep researching of mineral and chemical features of this rock by precision geochemical equipment. At the beginning electron probe microanalyzer had used and it helped to create the maps of investigation of spatial distribution of major chemical elements. In this article there was information about the method of creation maps, was noticed software that have used. As a result obtained models are shown. Some conclusions and ways of possible future activity have made after work with them.
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Induced seismicity and seismotectonics of Nadvirna oil and gas area (Ukrainian Precarpathians)
Authors L. Nazarevych and A. NazarevychSummaryDetailed analysis of seismicity and seismotectonics of Nadvirna oil and gas area (Ukrainian Precarpathians) is made. Association of local earthquakes to the faults, breaks and midwater surfaces of thrusts and folds surrounding structures with oil and gas deposits is revealed and some of the specific characteristics of their foci are analyzed. Local seismicity (activation of which took place in 1996–2012) is regarded as induced, that is, as caused by changes (during the oil and gas production) of hydrodynamic and geomechanical regime of oil and gas bearing and surrounding geological structures the relaxation of tectonic stress which was accumulated in these structures as a result of analyzed regional geodynamic processes.
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Mudflows risks. Assessment of mudflow risk on the example of east part of the Upper Tisza basin
Authors T. Chepurna, D. Kasiyanchuk, E. Kuzmenko, I. Chepurnyj and Y. BilinskaSummaryThe method of determining the reduced mudflow collective risk based on the calculation of average space-time probability of mudflows, partial total area of alluvial fans of mud over the period, plane of maximum destruction, population density, coefficient that takes into account the availability of protective systems in the area. Built cartogram assessments resulted of debris risks to administrative-territorial units (town and city councils).
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