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14th EAGE International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: May 11-14, 2015
- Location: Kiev, Ukraine
- Published: 11 May 2015
1 - 20 of 89 results
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Ratification of the resonant frequency method of remote sensing data processing on a local area of the Klondike gold fields in the Yukon Territory of Canada
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha, V. Prylukov and R. HatalaSummaryThe results of experimental testing of mobile and operative technology of resonant frequency processing and interpretation (decoding) of remote sensing (RS) data for “direct” exploration of various types of minerals on a local prospecting area in the Klondike Gold Fields in the Yukon Territory of Canada are analyzed. Within the surveyed area, a large number of anomalous gold mineralization zones were found and mapped. The derived results are compared with past results of geochemical, magnetic and electrical studies conducted by the Operator. They also confirm, in general, the research findings about the formation of the Klondike placer deposits from the quartz gold veins that are “orogenic” in nature. It is shown that for the small gold deposits, detection and mapping by remote sensing data processing should be conducted at a large scale – 1:2000 and larger.
Previous resonant frequency remote sensing work in 2014 identified anomalous gold mineralization zones within the areas of investigation in Madagascar, Sudan and Guyana. These anomalous gold mineralization zones were confirmed in the ore bodies that were physically discovered using trenches (pits) and core drilling.
The inclusion of this remote and direct sensing technology, integrated with traditional exploratory geological and geophysical methods, will minimize the cost of gold exploration, reduce the time of gold exploration, and increase the probability of success of finding commercial gold (high grams per tonne) or other mineral deposits. The effectiveness and efficiency of resonant frequency remote and direct sensing technologies have been demonstrated in over fifteen countries in the world.
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Experience of direct method using for hydrocarbon accumulations prospecting within areas of shale spreading in Poland
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha and V. PrylukovSummaryThe results of the application of frequency-resonance technology of remote sensing (RS) data processing and decoding for the detection and mapping of hydrocarbons (HC) accumulations in the areas of shale spreading within the prospecting blocks in Poland are analyzed. The obtained materials are compared with the results of studies on the local area of Marcellus shale basin in the United States.
Within the surveyed areas the anomalous zones of the “gas accumulation” (“gas, oil”) type were found and mapped. Parameters of some anomalous zones (their size and estimates of maximum values of fluid pressure in the reservoirs) allow to suggest these local areas for priority detailed study by geophysical methods and drilling. This is essentially the “Sweet spots” areas. The wells, drilled within the surveyed areas, do not fall into the contours of the detected anomalies; commercial gas inflows in these wells were not received. The hydrocarbon potential development starting of the surveyed areas from detected anomalous zones will significantly reduce the ecological impact on the environment. The results of investigation show that the projected productive horizons can be located both above and below the shale complexes. Therefore, when the hydrocarbon accumulations searching in the areas of shale spreading, the virtually all (available for drilling) interval of the cross-section should be studied.
In general, the results of experimental investigation show that proven mobile technology of frequency-resonance processing and interpretation of RS data allows you to detect and map operatively the “Sweet spots” zones within the shale rocks spreading.
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Expedience of direct methods additionally using for the prospecting wells for oil and gas location
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha, V. Prylukov and M. PetranovskayaSummaryThe results of the application of frequency-resonance technology of remote sensing (RS) data processing and interpretation within the search area of Zakhatsor (Republic of Kazakhstan) are analyzed. The used method work within the “matter” paradigm of geological and geophysical studies, the essence of which is the “direct” searching for a particular substance (matter): oil, gas, gold, zinc, iron, water, etc. Remote sensing data processing technology allows to detect and map operatively the anomalous zones of the “oil reservoir” and (or) “gas accumulation” type. Within the detected anomalies the depth of the anomalous polarized layers (APL) of the “oil” and “gas” type are defined by the vertical scanning of remote sensing data. Mobile technology allows to receive a new (additional) and, more importantly, independent information on the petroleum potential of the surveyed areas. The local site of three planned wells location was examined. The results showed that the wells are located in not optimal areas and, therefore, the probabilities of commercial HC inflows receiving in these wells are close to zero. The results of two wells drilling confirmed the forecast made prior to drilling.
In general, the mobile and direct methods using for hydrocarbon accumulations prospecting and exploration in conventional and unconventional reservoirs allow optimizing the location of prospecting, exploration and production wells, and therefore significantly reducing their number, the cost of hydrocarbon resources development and harmful effects on the environment.
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Crust structure and features of the geodynamic evolution of the South Shetland trough and Bransfield Strait (West Antarctica) by geophysical data
Authors V. Soloviev, I. Korchagin, S.P. Levashov, N. Yakymchuk and D. BozhezhaSummaryDuring Ukrainian Antarctic Expeditions (2006, 2012) new geophysical data for the West Antarctica bottom structures were obtained. The geophysical investigations included the geoelectric methods of forming a short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS). These methods were used for the crustal structure studying. Detailed geoelectric sections (with depth up to 24–32 km) were constructed for Drake Passage, Scotia Sea and Bransfield Strait tectonic structures as a result of these seasonal works. On the geoelectric models there are the major crustal boundaries and deep crustal heterogeneities. Some specific geoelectric boundaries below the Moho in Drake Passage are given. The occurrence of possible deep high-temperature zones of rocks may reflect the heterogeneity of Passage bottom structures and available processes of tectonic and magmatic activity with the local areas of modern rifting in Bransfield Basin. New hypothesis for geodynamical and evolution processes in Drake Passage and the Bransfield Strait forming is proposed. Data obtained showed that evolution of this region was determined as a result of a hot upper mantle plume upward into the Bransfield Strait crust. The VERS data obtained not confirm the presence of clearly expressed subduction zone at the continental margin of the South Shetland Islands, indicating the important role of thrust movements and extension of Bransfield Basin in the South Shetland Trench forming.
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Creation of a spatial database of prospecting works
By D. BozhezhaSummaryExperience of creation, accumulation and visualization of the information on prospecting works is described. The database included the information on 250 works executed by one collective for last 15 years.
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A new modified criterion function of information capability of spectral bands
By S. AlpertSummaryIn this work we considered some methods for selection of the most informative spectral bands. It was considered criterion function of information capability of spectral bands and it’s main properties. It was also proposed a new method to select spectral bands, which is based on the concept of new modified criterion function of information capability of spectral bands. In this work we considered an example using these criterion functions. It was shown, that the proposed new modified criterion function of information capability of spectral bands has some advantages and gives more accurate results than other methods.
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The distribution of electrical conductivity in the depths of the Crimean region
Authors T. Burakhovych and A. KushnirSummaryCorrespondence of regions of manifestations of ultradeep fluids observed in seismic tomography data to high conductivity anomalies in the Earth’s crust and upper mantle (seen in a quasi-3D model) as well as to increased heat flow and to distribution of hypocenters of earthquakes proves a connection of seismic activity in the Crimean region with manifestation of collision processes and a connection of the latter with the manifestation of ultradeep fluids processes.
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Specialized geoinformation system RAPID: features, structure, tasks
Authors B. Busygin and S. NikulinSummaryLast decades are defined by actively adopting remote sensing data, mainly including space imagery, in geoscience. One of the promising scientific and technical approaches, which allow efficiently managing large volumes of satellite images and other geospatial data and acquiring new useful information from this data, is a usage of geoinformation systems (GIS). Such systems must have capabilities to store, process, and visualize spatial data and analyze this data using Data mining approach. Specialized GIS RAPID (Recognition, Automatic Prognostication, Data Interpretation) is created in State Higher Education Institution “National Mining University”. The report gives basic facts concerning the system, its functional potential and examples of its application.
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Identification of weakened zones waterproof strata on Verkhnekamsk potassium deposit by the ground-underground gravimetric method
More LessSummaryOn the Verkhnekamsk potassium deposit located in the West of the Urals, the main problem for safe operation of mines is the preservation waterproof strata of rocks, i.e. thickness between the mines and the surface. The observation of this layer is performed by a complex of geophysical methods. An important role in this complex is reserved gravimetry, which includes observation of gravity in the mines. For example, the interpretation gravity field on one of the mines of the Verkhnekamsk potassium deposit shows the effectiveness of the implementation of surface and underground survey in order to detect weakened fractured zones waterproof strata in the complex of measures of safe operation of mining enterprises.
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Possibilities of MT/MV researches for prediction of mineral deposits in the Ukrainian shield
Authors E. Sheremet, T. Burakhovich, I. Nikolaev and B. ShirkovSummaryDeposits and occurrences of rare, precious, radioactive metals, phosphorus, titanium and other minerals that are spatially and genetically related to the distribution of ore-bearing metasomatic rocks and differentiated intrusions were predicted according to the results of geoelectric research of the Ukrainian Shield.
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Magnetic susceptibility of environmental objects in the hydrocarbon presence
Authors O. Menshov and R. KuderavetsSummaryThe measurements of soil magnetic susceptibility are an express and high-performance method for studying the hydrocarbons influences to the geological layers and soil. The informational content of the soils magnetic researches in the presence of hydrocarbons is: soil magnetic anomalies grading, the hydrocarbon fluid impact to the environmental magnetism, the change of the magnetic susceptibility of soils as a result of the autogenic magnetic minerals formation under the influence of refined production, technogenic and anthropogenic pollution by hydrocarbons. The magnetic susceptibility and its frequency dependence give the opportunity to identify and explain the processes mentioned above. Microorganisms are involved in the biodegradation of petroleum products. To determine the pedogenic, technogenic and, presumably, hydrocarbon-induced magnetic signals in soils, we used the frequency dependent magnetic susceptibility analyses. Non-polluted soils show lower values of magnetic susceptibility than those containing traces of hydrocarbons. For the entire sample, MS×10–8 m3/kg is: 7≤ MSlf ≤68, the mean is 21; Kfd: 3≤Kfd≤34, the mean is 8. Our findings suggest that the Kfd values are more than 3% and there is a straight regression dependence. Therefore, the soils of the studied hydrocarbon field are non-polluted and their magnetism can only be of pedogenic or hydrocarbon origin.
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Lognormal kriging for modeling of geogenic radon potential
Authors O. Shabatura, S. Vyzhva, I. Onyshchuk, D. Onyshchuk and V. OnyshchukSummaryLatest knowledge has been obtained on the structural and functional distribution of geogenic radon potential under territory of moderate ecological risk and submerged part of crystalline foundation. Based on these results development of geostatistical model are sufficiently useful to support the required regulatory decisions of radon exploration program including radon monitoring of equivalent equilibrium volume activities of radon (and toron) in dwellings and soil gas. The analysis of factor-spatial components of geogenic radon potential respond to a linear model and a few nested models. There are two large clusters of first nested model that have different spatial sizes. First component of model (more than 150 km) probably is linked to climatic factor and second (more than 5 km) should connect with type of soils. More small spatial cluster nested model are described by characteristics of geomorphologic-landscape structure of territory. There is some universality of main model structure are determines be radium content of bedrock and particles of soil. The main advantages of the geostatistical evaluation with geogenic radon potential for regional predication have been proved a correct prediction of correlation between the geological measuring of the soil radon and proper of long-duration measuring of radon into dwellings. It will give a possibility to correct routine measuring of radon levels in indoor air of dwellings, to set out a system of new observation in regions with a high dose loadings as well to plan radiological investigation and protective measures.
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Information Estimator Using Minimax Criterion for Solutions of Inverse Gravity Problem
More LessSummaryThe conception of the hidden information about sources of gravitational anomalies as joint fragment of the true model and disturbing objects has been introduced. It is shown, that in the presence of uncertainty inherent to inverse problems, the limit of possibilities of algorithms for constructing the best estimates of model parameters of sources is to maximize the guaranteed volume of hidden information. It is proved that optimal solutions of inverse problems, which realized the known conception of the minimax, have the maximum of the informativity (in this sense). Technologies of building of sufficiently representative subsets of feasible solutions, already tested on another class of inverse problems, have been offered. They have been fixed in the basis of minimax algorithms for solving inverse problems of the ore type. The examples of application of minimax algorithms of the solution of gravity inverse problems are given in the article.
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Geothermal conditions and crustal structure of the northwestern Carpathians
By R. KutasSummaryIn the northwestern Carpathian region three geothermal zones have been revealed corresponding with main tectonic elements with different ages: late Proterozoic early – Paleozoic (low heat flow, 40–55 mW/m2), late Paleozoic – early Mesozoic (intermediate heat flow, 50–70 mW/m2), late Mesozoic – Cenozoic (high heat flow, 70–110 mW/m2). The analysis of heat flow data, crustal structure and 2D numerical geothermal modeling along two seismic profiles crossing the main Carpathian tectonic allow us to conclude the heat flow changes are due to variable mantle component of heat flow, feature of the tectonic evolution and structure of the crust. The mantle heat flow changes from 20 mW/m2 in the East European Platform to 70 mW/m2 in Pannonian Basin and crustal thickness decreases from 40–50 km to 22–30 km. High mantle heat flow in the Pannonian Basin was associated with astenosphere uplift 25–30 Ma ago.
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Processing of MT/MV data on the Dovzhanka-Buz’ke profile
Authors B. Shyrkov, A. Kushnir and A. UsenkoSummaryThe results of MTS and MVP field research were processed using the PRC_MTMV software and the transfer operators in a wide range of periods were obtained. Their pseudosections allow to qualitatively assess the electrical conductivity along the profile. Anomalous areas, mostly coinciding with the deep fault zones of the Ukrainian Shield (Podilska, Talnovska, Gvozdavska, Vradiyvska and Pervomayska) were allocated.
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A componentwise Newton type method for solving the structural inverse gravity problem
Authors E. Akimova and A. SkurydinaSummaryFor solving the structural inverse gravity problem, a componentwise Newton type method is proposed. Parallelization of the algorithm and its implementation on a multicore Intel processor is developed. For a two-layer medium model, the structural inverse problem of reconstructing the interface between media is solved. The comparison of the componentwise Newton type method and modified Newton method in terms of the number of iterations and execution time is carried out.
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Earthquakes of Nadvirna area (Ukrainian Precarpathians) and kinematics of the breaks
More LessSummaryThe analysis of seismicity of Nadvirna area was made and tectonic localization of local earthquakes hypocenter is shown. Researches show that epicenters of earthquakes are located in the tectonic unit, which is formed by intersection of Precarpathian and Shopur-Nadvirna-Monastyrets faults. By the I. Gorbunova method the directions of breaks propagation are determined and these directions coincide with carpathian and anti-carpathian directions of major tectonic faults in investigated area.
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Results of pore space structure evaluation and complex analysis of petrophysical data for Zarichna area samples
Authors I. Bezrodna and A. ShynkarenkoSummaryNowadays due to high depletion of conventional hydrocarbon sources in Ukraine, investigations and exploration of unconventional hydrocarbon reservoirs became very important. In this work samples from Zarichna area (southern part of Dnieper-Donets Basin), were investigated. The purpose of studies was to estimate the petrophysical parameters of the sample collection, to determine their pore space structure and to decide if these samples can be identified as poor-porous oil and gas reservoirs. Studied samples have predominately clastic and carbonate composition with organogenic inclusions. Macro- and micropetrographic analysis were carried out during the lithological and petrographic study of samples. Accordingly to the conducted petrophysical parameters studies and on the basis of statistical analysis of relationships between the properties of Zarichna area samples collection, few samples of rocks were chosen as promising poor-porous reservoirs for the next studies. Rock physics data obtained during the experiment under the variable pressure conditions were used for the assessment of pore space structure. This assessment made the estimation of different types of pores content possible. The analysis of all obtained data made clear that only dolomite limestones and some sandstones from the whole sample collection can be identified as compacted reservoir rocks due to presence of fracture porosity.
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Prediction of fluid saturation of rocks collectors according to the gamma-ray log
Authors L. Skakal’s’ka and A. NazarevychSummaryThe empirical connection for compressibility, porosity and pressure in dry rocks for arbitrary geological region is derived. The calculations to distinguish the dry and fluid saturated rocks are conducted according to acoustic logging and core studies; the distinction of oil and water is made. The empirical connection of the longitudinal waves speed and the intensity of gamma radiation is derived. The speeds of longitudinal waves in the case of gamma-ray log are calculated. The algorithm and software are constructed. All elastic properties of the rocks of the well section are calculated.
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Spatial modeling and prediction of environmental situation in the filling Dombrowski career
Authors N. Hurska, S. Bagriy, L. Davybida, E. Kuzmenko and I. FitsakSummaryThe relevant problem of clean-up activities the Kalush mining regionare сonsidered. Created DEM Dombrowski career tools of GIS. Done prediction and simulation of the dynamics career the filling brines and critical limits of contact with brine aquifer gravel and pebbly horizon installed.
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