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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
1 - 20 of 94 results
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Role of geoinformation in decision making in the complicated conditions of well drilling
Authors H. Guliyev, G. Afandiyev, A. Kadymov, T. Makhmudov, I. Guliyev and G. HasanovaSummaryThe possibility of estimation and forecasting of trouble intervals (intervals with AHPR, absorption zones) is considered in drilling process on the basis of data obtained as a result of geological and technological explorations. Methods are proposed to estimate the density of drilling fluid, gravity degree of drilling fluid absorption in the complicated conditions. An expression was obtained to calculate the density of drilling fluid. Linguistic rules were also formulated based on fuzzy cluster analysis. Gravity degree of absorption depending on petrophysical characteristics was estimated. Two approaches - statistical and fuzzy were proposed for predictive estimate of gravity degree of absorption depending on the character of input data.
Statistical estimation is performed on value of the absorption coefficient.
In case of lack of information or its insufficiency, the method based on fuzzy cluster analysis is proposed. Five classes were obtained, each of which is characterized by relative gravity of absorption, the corresponding characteristics of layers and the intensity of absorption on the basis of which linguistic rules were compiled for qualitative estimation of absorption degree depending on petrophysical characteristics according to principle ‘if…, so…”.
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The field of atmospheric electricity and the geological structure of the Earth
By M. YakymchukSummaryThis paper present in the theses style the information about the main results of scientific research, obtained by the author recently. A model of the structure of Earth and atmosphere electric field is analyzed. It is specified the interdependence between electrical charge, temperature and pressure, which makes it possible to explain many phenomena, which we observe in nature. The geophysical complex, built on this model basis, finds its application during the hydrocarbons and other minerals prospecting.
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Application of direct-prospecting geophysical method for hydrocarbon potential assessment of large prospecting blocks in Arctic
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha and V. PrylukovSummaryThe authors continued testing the frequency-resonance method of remote sensing (RS) data processing and interpretation in the Arctic region. In 2014, for hydrocarbon accumulations prospecting the satellite images were processed over four major blocks in the Norwegian part of the former “gray” zone of the Barents Sea and over a large area in the Kara Sea.
In the Barents Sea the RS data were processed within four search sites covering 39742 km2. Area of 3D seismic work within them is 13956 km2. Two anomalous zones of the “gas deposit” type and 13 anomalous zones of “gas+condensate reservoir” type with total area of 1613 km2 were detected and mapped within investigated areas. Relative to total surveyed area (39742 km2) it is 4.06 %.
In area of Universitetskaya-1drilled well locations in Kara Sea the RS data were processed over block of 4150 km2. Four anomalous zones of “oil+gas+condensate» type and two anomalous zones of “oil+gas» type were found and mapped within survey sites. The total area of all anomalies is 510 km2. With respect to the area of the surveyed block this is 12.29%. Within the surveyed block in the Kara Sea the total area of all detected anomalies is significantly larger than those in the Barents Sea.
The received results show the principal possibility of remote sensing, seismic and geoelectric methods integrated application for hydrocarbon accumulations prospecting and exploration within offshore. The direct technology of frequency-resonance processing of RS data allow to investigate operatively in reconnaissance character the most promising areas in the Arctic region for the detection of giant and unique HC fields. This may significantly speed up the development of the oil and gas potential of Arctic region.
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On possibility the values of fluid pressure in reservoirs using for the oil-and-gas prospects assessing within deep horizons of cross-section
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha and V. PrylukovSummaryThe results of petroleum prospects assessment of the deep horizons of cross-section within some structures and oil and gas fields, as well as local sites for deep wells drilling in the Dnieper-Donets (DDB) and Caspian depression are analyzed. A survey of these areas were carried out with a frequency-resonance technology of satellite images processing using for “direct” searching and prospecting of hydrocarbons (HC) accumulations. The investigation results are given by maps of maximum values of fluid pressure in the reservoir. This is, in fact, a complex parameter, whose value depends of the gas pressure, contained in the fluid or in free form in the reservoir, as well as of its amount, i.e. of the rock porosity. The maps, constructed by the results of prospective structures investigation, are compared with similar maps on the known hydrocarbon deposits. Maps of maximum values of reservoir pressure can significantly narrow down the area of detailed prospecting work of priority character conducted and of prospecting wells location. Taking into account the hydrostatic principle such maps give the opportunity to shape the preliminary assumptions on the depth of hydrocarbon deposits location. The absence within the contours of detected anomalous zones of the “hydrocarbon deposits” type of sites with higher values of fluid pressure in reservoir allow avoids such areas (anomalies) from the list of objects that deserve priority detailed study and drilling. The conducted studies allow to conclude that the results of satellite imagery decoding - this is new information with the “direct hydrocarbon indicators”, which can be useful and in demand at any stage of the exploration process for oil and gas.
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Operative assessment of hydrocarbon potential of prospecting block in the region of Marcellus shale spreading by the frequency-resonance method of remote sensing data processing and interpretation
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha and V. PrylukovSummaryThe possibility of mobile technology of frequency-resonance processing and interpretation of remote sensing data using for the local areas with increased hydrocarbon (HC) (oil, gas and gas condensate) concentrations detection and mapping within the shale spreading is analyzed. This technology is the “direct” method for oil and gas prospecting and exploration. Experimental studies were conducted in local area of Marcellus shale spreading. The anomalous zones of the “reservoir of gas” (“gas, oil”) type were detected and mapped within the surveyed block. Parameters of many anomalous zones (areas and maximum estimates of fluid pressure in the reservoirs) allow us to classify them as promising objects, the probability of commercial HC inflows from which is relatively high. The observed anomalies should be considered as priority local areas for detailed study by geophysical methods and drilling. This is essentially the “Sweet spots” zones. The received estimates of maximum values of reservoir pressure within the observed anomalous zones vary in a fairly wide range. This indicates that the projected productive horizons can be located both above and below the shale complexes. Therefore, the practically all (available for drilling) interval of the cross-section should be studied, when for the hydrocarbon accumulations prospecting within areas of shale spreading. Anomalous zones with very low values of fluid pressure in the reservoirs should not be considered as priority targets for detailed study. The development of the surveyed area starting from detected anomalous zones will allow significantly reduce the harmful effects on the environment. The tested mobile technology allows detecting and mapping operatively the “Sweet spots” zones within the shale and other unconventional reservoirs spreading.
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Application of frequency-resonance method of remote sensing data processing for ore mineral prospecting in different regions of the world
Authors S. Levashov, N. Yakymchuk, I. Korchagin, D. Bozhezha and M. PetranovskayaSummaryThe results of experimental testing of mobile and operative technology of the remote sensing (RS) data frequency-resonance processing and interpretation (decoding) for “direct” searches of the various types minerals on the ore deposits and prospective areas are analyzed. Exploratory studies were conducted with this technology application within ore bearing areas in the Republic of Kazakhstan, Ukraine, Cameroon, Sudan and Canada. It is shown that for the small objects (lodes) detection and mapping the remote sensing data processing should be carried in a large scale – 1:2000 and larger. As a result of the geological survey of some revealed in 2014 anomalous zones with the help of trenches (pits) and drilling within investigated areas in Madagascar, Sudan and Guyana the rocks with gold mineralization were discovered. This technology inclusion in the traditional complex of exploratory geological and geophysical methods will contribute both to minimize the financial cost for the particular exploration problem solving and to reduce significantly the time to implement them. Detection within the mapped anomalies in different regions of the gold-bearing rocks (with a high gold content in the rocks, including) is a fundamentally important evidence of efficiency of the frequency-resonance principle of remote sensing data processing and interpretation.
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Central Basin of the Bransfield Strait: magnetic anomalies and the formation stages of the Antarctic Peninsula continental margin structures
Authors V.D. Soloviev, I. Korchagin, S. Levashov, N. Yakymchuk and D. BozhezhaSummaryIt is shown that the Central Bransfield Basin magnetic anomalies sources were connected with the neovolcanic zone development processes. Age of linear magnetic anomalies may reflect the cooling time of plateau basalts which formed in a result of periodic thermal regime change processes in the upper mantle. The powerful tectonic movements of border structures had a great influence too. The deep geoelectric boundaries and large mantle heterogeneities distribution in different segments of the Drake Passage can be interpreted as large-scale processes of formation and deep transformation of the primary crust fragments under the influence of sufficiently large diapirs of partially molten rocks.
A possible mechanism was proposed for the evolution of the Antarctic Peninsula continental margin structures and the Bransfield Strait in result of moving the mantle plume to the upper layers of lithosphere and young rift system formation under the trough axis in the Central Bransfield basin. New data give additional information for better understanding the evolution stages of structures at this region.
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Studying of deep layers of the geological medium on the basis of data of seismic exploration and seismology
Authors H. Guliyev, K. Aghayev, T. Volkov and G. HasanovaSummaryThe deep layers of the geological medium are studied on the basis of joint processing and interpretation of data of seismic exploration and seismology. Data on earthquakes were processed, velocity models of the medium were defined on velocities of pressure and shear waves. The value of the velocity of propagation of pressure waves was adjusted on seismic profile on data of seismology. According to the clarified results, sections of Poisson’s ratio were calculated on regional seismic profiles in the South Caspian Basin.
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On applying magnetic method for soil pollution monitoring in Zaporizhzhya
More LessSummaryThe paper is devoted to the study of magnetic properties and contents of heavy metals in soils from Zaporizhzhya - a powerful industrial center. The low-frequency magnetic susceptibility (Xlf) of soils varies within the range 61… 4087×10−8 m3/kg with a median value 271×10−8 m3/kg, and the frequency dependence of magnetic susceptibility Kfd is 0…13 3% with a median value 2,0 %. The low Xlf and high Kfd values inherent to natural soils are observed on the right-bank western part of the city, and low values Kfd <2% and Xlf >10−5 m3/kg are observed in the main industrial zone where steel-mills are situated.
Statistically significant correlation between magnetic parameters and heavy metals contents are found. Magnetic methods can be recommended for monitoring of soil contamination degree in the city of Zaporizhzhya.
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Integration between the remote sensing of the Earth data and geological-geophysical studies for polymetallic ore prospecting
Authors A. Bunina, O. Azimov, S. Stankevich, Y. Dorofey and V. ChepurnoySummaryThe model for automated integration and complex interpretation of remote sensed and geological-geophysical data to evaluate territories ore prospectivity is offered. The integration possibility is demonstrated over the Novotroitska area of the South-Donbas near-fault volcanotectonic depression. The spatial distribution of polymetals prognostic content within the study area is obtained.
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The results of seismic observations in the central part of the Ukrainian shield in 2007–2013
Authors V. Omelchenko, A. Kendzera and V. KuchmaSummaryThe results of the analysis of seismic events recorded in the Ukrainian Shield from 2007 to 2013 are presented. The comparison of seismic activity with the deep structure of the Earth’s crust and tectonic features of the region was accomplished.
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Regularized methods for solving nonlinear inverse gravity problem
Authors E. Akimova, V. Misilov and A. TretyakovSummaryRegularized variants of conjugate gradient and componentwise gradient methods for solving the three-dimensional nonlinear inverse gravity problem of finding the density interface were constructed. The algorithms were parallelized and implemented for multicore processors and GPUs. The model problem with noised synthetic data was solved. The comparison of the proposed methods and the local corrections method in terms of iteration number, execution time and error of the solution was carried out.
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Information products of remote sensing of Earth from space, as the basis of the Ukrainian National Internet-center monitoring and analysis of data for agriculture
Authors B. Busygin, I. Garkusha and K. SergieievaSummaryTo systematize domestic and foreign experience of usage of space remote sensing data, transformation methods for different-level and different-time datasets and program tools for their processing to creation of the National Internet-center of monitoring and analysis of data for solving, among others, the problems of crops productivity forecasting in Ukraine. The review of world achievements in the field of diverse space surveys using for grain agriculture problems solving is accomplished. The main questions related to identification and inventory of agricultural grounds for control of crops condition, definition of soils structure, quality and timeliness of various agricultural procedures controlling, dynamics of development of crops supervision and productivity forecasting are cover. The main requirements are formulated and necessary components for creation of architecture of information, methodical and program implementation of the Ukrainian Internet-center for monitoring and the analysis of space remote sensing data for grain agriculture problems solving are defined. The results received can be used for preparation and implementation of main stages of Ukrainian Internet-center creation for agricultural areas monitoring.
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GEANT4 like computational tool of nuclear geophysics
Authors V. Belokhin and A. ZhemchugovSummaryNuclear geophysical methods are considered to be the most informative and important for monitoring oil and gas fields. Traditionally for their development statistical calculations by Monte Carlo method are used, which allows from one side to reduce natural modeling, and from the other side to obtain parameters fundamentally not achievable by direct measurement, for example, the basic gamma spectra. This technique, though quite expensive in terms of computing resources is both versatile to accommodate a variety of physical processes and to modeling facilities with complex geometries and elemental composition. There are several multi-purpose software packages for the simulation of nuclear processes in the material, among which are the MCNP, FLUKA and GEANT4.
For the nuclear logging methods simulation authors have chosen the GEANT4 package - a multipurpose program complex with open-source software, which has the required functionality. GEANT4 package has been developed at CERN to simulate the physical processes taking place during the passage of elementary particles through matter.
The paper describes the experience of GEANT4 use to simulate the main nuclear-geophysical methods: gamma spectrometry logging, neutron-neutron and pulsed neutron-gamma spectrometry logging.
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Modelling of groundwater level surface as indicator of radiation safety area
Authors O. Scherbak, T. Koshliakova, V. Dolin jun., I. Rudenko and Y. KutskaSummaryThe spatial-temporal dynamics of the upper Quaternary - upper Eocene groundwater complex hydrodynamic regime in the influence zone of Kyiv subsurface radioactive waste storage was analyzed by using of geoinformatical research methods. The presence of groundwater level downtrend and hydroizohypses spatial configuration changes were determined. Based on the results obtained by using statistical analysis the conclusion was made about the low reliability of the provision of groundwater level monitoring data.
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Finite-difference kinematic migration as one of the ways of obtaining information about seismic boundaries and seismic velocities in geological environment
Authors O. Pylypenko, O. Verpakhovska and V. PylypenkoSummaryMigration is divided into kinematic and dynamic. Dynamic migration allows you to show the internal structure of geological environment with all its features as the dynamic parameters of the observed wave field. The kinematic migration gives information about the seismic boundaries and seismic velocity. The result of kinematic migration can be further used to realize the dynamic migration.
The kinematic migration is based on a downward continuation of the time field of a direct and reversed travel-times that is realized by solving the eikonal equation on a special type of grid with finite- difference method. At the same time kinematic migration can be used travel-time curves of the reflected and refracted waves. The report focuses on the subject of obtaining information about the seismic boundaries and seismic velocity in the geological environment using the finite-difference kinematic migration.
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Relation of lineaments network features and distribution of ore objects by the example of the East African Rift area
Authors B. Busygin and S. NikulinSummaryThe technique and results of studying of spatial interrelation between characteristics of satellite images lineaments network and localization of vein type ore objects on the example of East African rift valley area (within Democratic Republic of the Congo territory) is given in the paper.
On the studied area prevail lineaments with azimuths of 0, 45, 90 and 135 degrees which are found everywhere on Earth and form some “normal” global network related with processes of planetary level. In paper it is shown that the perspective scope of an inquiry is studying of deformations of “normal” network which are connected with local geological processes. In particular, it demonstrated that there is a relationship between the localization of ore deposits and the high concentration of lineament deformations, for example, their breaks and turns.
The received results confirm existence of relationship between a structure of lineaments network and the known deposits, making it possible to use lineament analysis data for ore objects forecasting.
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Investigation kerogen types according to pyrolysis of samples (for example, the Dnieper-Donets basin)
Authors Y. Zelenko, O. Dziuba and O. KarpenkoSummaryThe analysis of 60 samples of kerogen based on statistical data processing pyrolytic parameters (pH and temperature index maximum output of hydrocarbons in the cracking kerogen) is conducted. The paper studies kerogen types and nature of saturation of productive strata by the method of benchmarking and comparisons.
The results of data processing obtained by pyrolysis «Rock-Eval» rock samples from wells of different parts of the Dnieper-Donets basin. The research allowed to evaluate the spatial distribution of different kerogen types and determine the nature of the maturity of organic matter within the individual Straton disclosed wells.
There are confirmed different kinds of mature organic matter from existing oil fields and to the potential gas reserves of unconventional type within the studied structures.
The analysis of the spatial distribution of types of kerogen within the DDD based thermal pyrolysis conversion rock and «Rock-Eval». Installed on certain types of kerogen studied structures coincide with the lateral distribution of hydrocarbons in DDD from north - west to south - eastern part, namely oil deposits characteristic of northern and gradually replaced the condensate and gas in the southern part. In the studied core samples predominant type III kerogen, which according to existing classifications, formed mostly from the remains of terrestrial vegetation and paleoumovah continental margins and deltas.
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The ways to improve the technique of seismic microzonation of building sites in Ukraine
Authors A. Shynkarenko and O. KendzeraSummaryThe paper presents the analysis of the existing technique of seismic microzonation of building sites in Ukraine. There are discussed the previous experience of seismic zonation application and the background of general detailed seismic zonation and seismic microzonation technique. Seismic microzonation regulatory documents that are used in Ukraine and abroad are analyzed. There are highlighted main issues of the technique of seismic microzonation of building sites in Ukraine that are: unreasonable selection of the soil volume to be investigated; lack of unique approach to define the relationships between soil attributes and seismic impact features; inaccurate assessment of the correlation between soils seismic stability and groundwater level. There are proposed the ways to solve these issues.
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Magnetovariational response functions 3D models of deep faults
Authors O. Hishchuk, T. Burakhovich and T. PrichepySummaryCalculations and analysis magnetovariational response functions 3D theoretical models of deep regional faults with different inclination angles (900 to 150) were held. The intensity of induction parameters depends on inclination angle and deviations in magnitude W (for model vertical conducting structure 900) of the inclined 600 and 300 constitute the 10% and 30%, respectively. It is shown, that the ratio of the maximum (modulo) values tippler, obtained for the period, corresponding to the maximum frequency response, depending on the inclination angle the subvertical conductor is described logarithmic function. The versatility of this dependence for a other series models raises doubts, which defined complicated, the behavior of the electromagnetic field, arising from three-dimensional conductive structures even elementary forms. The dependence of the angle of incidence of the fault on the parameter distance relationship between the provisions of the maxima at Tmin and Tmax is linear. It is shown, that in the construction and calculation of 3D models real geological environments can with some confidence using conducting deep faults in the form of subvertical structures.
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