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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
41 - 60 of 94 results
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The structure and components of information-analytical system of natural-technical complexes monitoring and assessment (for Transcarpathian region)
Authors O. Ivanik, M. Nazarenko, S. Chomenko, O. Mykhaylenko and S. ZamkovetsSummaryThe consideration is given to the general structure of the of information-analytical system of natural-technical complexes monitoring and assessment (for Transcarpathian region). Geodatabase, data collection, processing and service subsystems are the main functional links of the developed system. The basic functional tasks of the system have been defined. They include the input of initial observations information, database information, solving of spatial analytical tasks, generation and printing of reports; work on georeference data (analysis and visualization of geospatial data, developing of risk models) and forecasting of the complex systems behavior under the influence of hazardous geological processes.
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Interrelation between neotectonic movements and structural formation in Kanev area
Authors L. Tustanovska, G. Ivankevich and E. YahnoSummaryResearch of tectonogenesis within the Near-Kanev Dnieper area has been shown that regional and local tectonic structures include a variety of shapes and diverging at all stages of development. The method of structural morphometry adapted to the environment of GIS has been used for the analysis of morphogenesis and tectonogenesis. A different genetic models of paleorelief and modern surface have been developed. It is confirmed that tectonic movements within Kanev dislocations had differentiated character that appears on different order morphometric maps. Morphometric maps reflect the gradual formation of dislocations under the influence of tectonic movements, external factors (denudation, accumulation, erosion and glacial processes) and diapir formations. Tectonic scheme of local structures and dislocations has been proposed. It has more than 40 local dislocation structures. The special consideration is given to interrelation between relief formation and tectonic movement. It enables to allocate anticline and syncline structures of different orders and identify their features.
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On the restrictions of the digital geomapping systems during the geophysical anomalies modeling
By Y. DubovenkoSummaryPurpose. The new requirements for the correctness of meso-scale regional constructions according to the data of gravitational and magnetic fields are analyzed. The transition of the interpretation facilities of these fields to the new field and media models is postulated. These models must meet the new requirements to the methods of observation and practice of interpretation. From this point of view, classic formulations of linear boundary value problems for gravity and magnetic should be regarded as first approximations of media.
Design/methodology/approach. It was determined that at the transition to more accurate models of regional media one should take into account the effects of the locality and the vector nature of the appropriate anomalies. Because of this, we brought new means for image analysis of initial data – digital maps.
Findings. The limits of applicability of visual images of the original models are analyzed. It is noted that for the most correct reconstruction of geological surfaces it is advisable to draw soft packs, which use the finite element method for surface interpolation, with basis in the form of bicubic B-splines. It is pointed out that in the construction of sections from the cross-sections of these surfaces can be automated the composition of some of its geometric characteristics. The information about the errors of visual analysis and the formal classification of maps according to the analysis is compiled.
Practical value/implications. The mechanisms of formation of false stereotypes of the development apart from a priori geological knowledge are illustrated by the several examples. The tool for the efficient processing of large geophysical datasets is proposed, Isoline program. The dependence of the parameters of numerical solution on the method of data interpolation is defined. The prospects for simulation by the digital maps are listed out, as far as the restrictions on the quality of the source data and requirements to the parameters of their filtering.
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Application of geophysical methods holography to study the deep structure of Korosten pluton
Authors M. Bankovskyi and A. GeikhmanSummaryApplied the idea of a common wave nature of all potential fields of geophysical holography method to build a real tool to help seismic methods in the study of the deep structure and the search for mineral deposits in the territory of Korosten pluton in the Ukrainian shield
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Application of geophysical holography in the search for oil and gas in the Ukrainian Carpathians
Authors M. Bankovskyi and A. GeikhmanSummaryApplied the idea of a common wave nature of all potential fields of geophysical holography method to build a real tool to help seismic methods in the search for oil and gas in the Ukrainian Carpathians.
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Burial History Modeling of the Taranaki Basin (New Zealand)
Authors I. Titenko and I. VirshyloSummaryThis investigation was made to study burial history of Taranaki Basin, that situated on the west coast of the North Island of New Zealand. It produces from about 20 fields, ranging from the giant Maui gas-condensate field. The basin characterize by complex tectonic history. In evolution of Taranaki Basin it can distinguish two major tectonic event. First it’s rifting in the start of evolution of the basin and second it’s volcanism in the Miocene, which led to the formation of hydrocarbon migration paths, traps and greatly influenced to the generation of hydrocarbons.
Novva 1D Modelling software used to build the models. 1D modeling of burial history of basin was made for four different wells on the base of wells data, geochemistry and paleogeography. Determined that Rakopi and North Cape major Cretaceous source rock are completely matured, but have significant different generation histories. The influence of the Miocene volcanism on the thermal history of the basin is presented. The results provide important information about generation and hydrocarbon prospects in this region.
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Statistical models of results comparing of roller-bit and core drilling studying while mining exploration of iron ore deposits
Authors A. Plotnikov, A. Belous and M. KuryloSummaryComparison of sampling results of roller-bit, core drilling and trench sampling were held for Yeristovske deposit of banded iron formation. Comparison was done for contents of total iron, iron associated with magnetite and silica.
Studying of different sampling methods of banded iron formation allows choosing the best method for mining exploration of Yerystivske deposit. For this comparison, the experimental block was selected in the rocks of main productive strata deposit К25. Data of chemical sampling after roller-bit and core drilling showed that variances of total iron and iron associated with magnetite vary, but mean values are similar. Dispersions and mean values of data for quality concentrate and sampling after roller-bit and core drilling are not different. Taking into account results of the comparison, it is recommended to use sludge with core drilling while mining exploration of banded iron formation. Geophysical methods give correct results in a case of adjustment in accordance with chemical core sampling.
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Influence of GPR measure step and depth of investigation on quality of GPR profiles
Authors A. Chernov and O. LoshakovSummaryIn that paper results of investigation on experimental geophysical polygon are represented. The aim of investigations was to find out settings of measure step and depth of investigation to get proper differentiation of buried objects on GPR profile to the depth of 4 meters in the shortest time. Profiles were recorded by the same device VIY2-300 GPR (transmitter and receiver antennas’ frequency is 300 MHz). The results of experiment show, that to localize steel pipes (diameter 5 cm and length from 1 m to 2 m), border between void (styrofoam), dripped soil and natural soil on depth to 4 meters, measure step on experimental field should be >127 mm and proper depth of surveying is 3–4, 6 and 9 meters. Achieved results, related to settings should be tested on other sites to make decisive conclusions. Further investigations related to that topic are going on.
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Seismicity of Ukrainian Precarpathians in the context of tectonics and vertical Holocene movements
More LessSummaryThe study of seismicity in Ukrainian Precarpathians for the historical and instrumental observation periods in connection with tectonics and vertical Holocene movements is carried out. The seismicity here has the spatial and temporal peculiarities. It is clearly differentiated by areas and energy potential. The analysis of seismicity detect the main seismoactive faults in the region. That are Precarpathian, Shopur-Nadvirna, Turyanka, Hutsul faults. Majority of local earthquakes are localized in the zone of influence of these faults. Most seismic activity of Precarpathian fault is observed recently in the Nadvirna city area. Relationship of local earthquakes sources with vertical movements in Precarpathians for the Holocene period was analyzed. It was revealed that all earthquakes sources are located in areas of positive integral vertical movements. Predominant number of earthquakes occur in morphostructural neotectonic units in the crossing of Precarpathian fault with faults of subdiagonal north-eastern orientation, in areas with a total amplitude of the vertical Holocene movements in the range +5,7 ÷ +10,2 m.
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Preliminary results of magnetic investigations at Starunia oil-ozokerite deposit (Carpathian Region, Ukraine)
Authors O. Menshov, R. Kuderavets and I. ChobotokSummaryHydrocarbon migration and microseepage effect, which change the composition of magnetic minerals in well strata and near-surface geological horizons, as well as soils, can cause local magnetic anomalies and changes in the magnetic properties of soils. Understanding the effects of hydrocarbons on the magnetic mineral diagenesis is of great importance. The purpose of our magnetic studies at Starunia is to characterize the local magnetic field upon Starunia oil and ozokerite site. The specific objective of the paper is to investigate the lateral and vertical variability of the magnetic properties of the soil in the outcrops of the Velyky Lukavets river valley and near the Nadia-1 well in order to establish their possible relationship with hydrocarbons. Starunia is the small village in the Ukrainian Carpathians. This place became the world famous thanks to the paleontological discoveries of large Pleistocene mammals in the first half of the 20 th century. The Starunia oil-ozokerite deposit occurs in the Boryslav-Pokuttya Unit of the Carpathian Foredeep, which is the main oil- and gas-bearing part of the Ukrainian Carpathians. The Carpathian thrust-and-fold belt consists of a number of nappe, thrusted northeastward. We performed the measurements of the magnetic field along the Mag1, Mag2 and Mag3 profiles. The soil magnetic susceptibility was measured along Mag1 profile. The soils were sampled for the laboratory magnetic measurements The significant contrasts of magnetic field with the local negative magnetic anomaly of about 30–35 nT and width of about 700 m was identificated upon Starunia oil and ozokerite field. The origine is connected with the Vorotyshcha Beds layers and lenses of salt rock as well as numerous veins of ozokerite. The spatial position of this anomaly is correlated with the Rinne fault on which is leaking to the surface oil and clay pulp with salts of different composition.
The high hydrocarbon content in the near-surface sediments and soils within the Starunia site must be associated with hydrocarbon migration from deeper accumulations to the surface, which led to the formation of newly magnetic minerals. We suggest that magnetic anomalies and magnetic susceptibility of soils can be indicative of the presence of hydrocarbons if used along with other geophysical and geochemical methods.
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Modeling of topography indices for analysis of neotectonics and research of local tectonic units
By T. AndriietsSummaryThe possibility of neotectonic mapping to conduct an analysis of vertical movement stages has been shown. The technique of such neotectonic mapping includes additional mathematical operations on structure-morphometric models in GIS. Designed models are characterized by more effectiveness for both analysis of spatial-temporal vertical movement and research of local tectonic active units. In result of designed models analysis in part of Porkulets nappe and Vyhorlat-Hutyn volcanic chain the stages of neotectonic processes in Pliocene-Quaternary time have been reconstructed. The tectonic active units of high rank are defined in the maps of vertical movement in early stages. The local units are defined by high temporal differentiation of movement amplitudes. The defined units are accorded with regional geology that proves well good effectiveness of designed models.
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The mathematical methodics for oil and gas reservoir rocks discovery in the wells open-casts according to the logging data
Authors L. Skakal’s’ka and A. NazarevychSummaryThe mathematical methodic for predicting of oil and gas reservoir rocks in the wells’ open-casts according to the data of logging and core researches is presented. Within the methodic, on the basis of the adequate mathematical model of rock, the generalized equations of relationship between the compressibility ratio, porosity and pressure in the fluid saturated and dry rocks are derived. The relations for the layerwise determining of the elastic characteristics of rocks for different lithology and geodynamic genesis are built. On the basis of the theoretical and empirical relations the functional for prediction the fluid type in the pores of the wells’ open-casts is created. This methodic is applicable for any geological region with existing parametric database of the log and core data. It is tested on the data of the wells’ structures of the Western oil and gas region of Ukraine (Lischiny, Buchach, Ludyn, Zaluzhany, Zarichnyany, Nyklovychy). The peculiarities of the methodic application are illustrated by the concrete examples of calculations according to the acoustic and gamma logging data.
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On solving the three-dimensional structural gravity problem for the case of a multilayered medium by the componentwize Levenberg-Marquardt method
Authors E. Akimova and A. SkurydinaSummaryComponentwise method on the base of Levenberg-Marquard method for solving the structural inverse gravity problem of finding the contact surfaces in a multilayered medium is proposed. The algorithm was parallelized and implemented for multicore processors. The problem with quasi-model data for four-layered medium was solved.
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The analysis of the initial field transformations for their sources formalized delineation
Authors V. Logvin and P. PigulevskiySummaryThe main goal of the research is formalized delineation of geological objects from the initial potential field based lineament analysis. It is assumed that the lineaments geometrically correspond to the “inflection lines” of the field that can be represented mathematically as zero contour curvature of a two-dimensional function. Mathematical calculations for the modeled magnetic and gravitational fields have shown the effectiveness of the proposed lineament analysis for geological mapping regions. The proposed method of the lineament analysis allows to extract geologically meaningful lineaments confidently, even in low-contrast potential fields.
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Hydrogeological and geoinformatical aspects of European standards implementation in Ukraine in the area of natural waters quality and water management
Authors O. Koshliakov, O. Dyniak and I. KoshliakovaSummaryThe problem of Ukrainian legal framework regarding water resource management current state compliance with the EU Water Framework Directive basic requirements is considered. The experience of the EU countries relative to the territory hydrographic demarcation schemes development is analyzed. Implementation of state water management reform process, which aims to achieve compliance of this system with those designs that were made in the EU, is offered. Methodical approach to Ukrainian territory complex demarcation, which will enable to improve management system in the field of natural waters use and protection and national water resources reproduction through the actual implementation of it by using the basin principle (according to EU Water Framework Directive), taking into account hydrogeological component and possibilities of GIS, is proposed. The structure of stepwise research directed at creating the effective natural waters quality monitoring system according to European Union standards and prevention of potential environmental threats to security is described.
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Identification of petroleum system elements and downscaling of complex geo-data sets for development of 3D model of semi-regional scale. Example of Southern border area of Dnieper-Donets rift
By I. KarpenkoSummarySpatial 3D modeling of petroleum system is one of highly informative and effective geo-tools for prediction of oil and gas accumulations in undrilled prospects. Petroleum system of studied area, Southern border of Dnieper-Donets basin (DDB), includes over 60 productive horizons (reservoirs) with hundreds of discovered hydrocarbon accumulations and several tens of organic-rich horizons (source rocks). Development of 3D model of petroleum system of semi-regional scale requires a downscaling of geophysical, logging, geochemical, lithological and petrophysical data sets. Major Carboniferous and Devonian productive horizons and source rocks were identified within Southern border zone of Dnieper-Donets rift. Identified reservoirs and source rocks were downscaled and combined for 1D and further 3D modeling based on described principles. 1D modeling was performed for 53 boreholes within studied area. Modeled thermal evolution of source rocks corresponds to vitrinite reflectance values.
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Automated selection based on vector measurements of the anomalous magnetic field
Authors T. Mikheeva, E. Lapina and N. PanchenkoSummaryProposed software for vector measurements of the anomalous magnetic field. An example of simulation multivariate modeling one of the sections Sourozh field.
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Estimation of the areal upward hydrogeomigration and risks of underground water polluting in the process of unconventional hydrocarbons extraction
Authors O. Azimov, Y. Dorofey, V. Lyalko and Y. YakovlevSummaryThe relevance of the application of modern remote aerospace and hydrogeological methods in the problems of the ecological safety for the hydrosphere in Ukraine during unconventional hydrocarbons extraction, especially shale gas is considered. Case studies of pilot implementation of these methods are present for the Bilyaivska area adjacent to the Yuzivka licensed site within the Dnieper-Donets Depression as the biggest artesian basin within Ukraine. A number of the hydrogeological filtration parameters of multilayer’ system (water aquifers, aquitard and aquiclude regional layers) enable to obtain the rough estimate of the temporal indices for the areal upward pollutant migration from the fracturing zone to the groundwater aquifers in the potential process of shale gas production (as an example the 400-Bilyaivska well). It is found that the possible variety of the rock double permeability in the complete rock continuum is responsible for the passage time of diffusive-convective pollutant migration from the fracturing zone to the groundwater aquifers, and this time interval consists of 170÷70 years. Considering the balance ratio between the water volume for the dilution of pollutants to the safe concentrations and the volume of porous solutions, which is over the fracturing zone the conclusion, is drawn that remains of technological solutions in the fracturing zone in some cases can continuously contaminate the underground water within the zones of slow and active water exchange.
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Geochemical data analysis and prediction of hydrocarbon accumulation in the territory of Rotmistrovka impact structure
Authors M.Yu. Gryga, I.D. Bagriy, K.M. Starodubets and V.G. SemenyukSummaryOil and gas potential of impact structures is a promising direction in exploration geology along with unconventional hydrocarbon sources like shale gas, tight gas and coal bed methane. Impact conditions contribute to redistribution and accumulation of hydrocarbons, create unique types of traps and provide migration of hydrocarbons from the source rocks. Industrial hydrocarbon reserves are proved in 12 of the 250 credible impact structures in the world. Now in Ukraine seven credible simple and complex impact structures are discovered. The area of Rotmistrovka Ukrainian crater is explored by the complex of structural-thermometric-atmogeochemical researchs. Article deals with the analysis of geochemical data of alkans, alkens, radon and thoron. It was established that the oil and gas potential of Rotmistrovka impact structure is associated with its perimeter parts which most likely related to its rims. Oil and gas formation within the studied area is influenced by both factors directly related to hydrocarbon migration and faulting factors that could be intensified by impact event. Features of appearances of oil and gas potential of Rotmistrivska impact structure are typical for other simple impact structures in the world.
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Prediction of promising areas for coal bed methane production by the structural-thermal-atmogeochemical research methodology (STAGR)
Authors V.R. Dubosarskiy, V.G. Semenyuk, O.O. Yantsevych and V.A. GlonSummaryOn example of using the structural-thermal-atmogeochemical research (STAGR) within the coal deposits considered forecast of promising areas for the extraction of methane from the rock mass.
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