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16th International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: May 15-17, 2017
- Location: Kiev, Ukraine
- Published: 15 May 2017
21 - 40 of 114 results
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Application of NMR Technology in the Evaluation of Properties of Petroleum Reservoirs
Authors M. Amani, M Al-Jubouri, S Khadr and A SayedSummaryThe objective of this study is to review briefly the various applications of the NMR technology currently being utilized for formation evaluation purposes and discuss their effectiveness. Furthermore, to adequately understand the type of interpretations that could be made from the NMR measurement, a thorough literature review will be conducted to first understand the physics of the Nuclear Magnetic Resonance measurement and define all its key terms.
The various methods, in which NMR measurements have been utilized in the petroleum industry to evaluate formation properties such as porosity, permeability, identification of multiple fluids in the pore space, and oil viscosity are discussed in this study.
This study shows that the laboratory and field applications of the NMR measurement show a remarkable enhancement in quantifying key parameters such as porosity and permeability. NMR measurement also gives a better understanding of formation fluid types, rock wettability, permeability, and other petrophysical parameters that are essential for proper formation evaluation
Overall, this study concludes that NMR technology has greatly contributed to the enhancement of formation evaluation in the petroleum industry and became an indispensable part of it.
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Passive aerogeophysical electromagnetic survey with seismic-like sections
More LessSummaryIn this paper, we present a new technology that uses recordings of the spontaneous elect romagnetic emission from the lithosphere, which are acquired on board a light aircraft. This nonlinear phenomenon has a number of unusual properties that allow the Earth’s crust to be studied to a considerable depth. A technique is proposed for visually obtaining seismic-like sections wherein emitting horizons are used instead of reflecting horizons. Comparisons of the sections with the seismic data obtained in the Andina Sur (Bolivia) are presented.
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Technology of Laboratory Investigations for Interim Fluctuations of Electrical Properties in Rocks
Authors S. Vyzhva, V. Onyshchuk, M. Reva and I. OnyshchukSummaryThe features of techniques for petroelectrical investigations in rocks are discussed in the article. The electrical properties of rocks has been refined and applied non-standard method of laboratory tests to determine as a result of experimental laboratory works. The technology of laboratory researches of interim fluctuations petroelectrical parameters of extracted and saturated by model reservoir water of rock samples with direct current has been developed due to digital megohmmeter C.A. 6547 and multimeter UT-70B. Experimental studies of interim changes in electrical resistance of rock samples has been done according to developed technology. The developed method is based on two parameters of polarization. They are polarizability and polarization rate. Polarization rate is the derivative of polarizability. It characterizes the rate of change over the course of time of the polarizability (unit of measurement – percentage / a second). The polarization rate is an electrical parameter that has scarcely been used in laboratory petrophysical researches before. According to the results of laboratory measurements, the polarization rate has more stable correlation with physical and chemical properties of rocks than their polarizability. Thus, the polarization rate in combination with polarizability could be used to build complex petroelectrical models.
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Analysis of the carbon carbonate reservoir rocks of Rudenkivs’ko-Proletars’ka area based on the structure determination of the pore space
Authors I. Bezrodna and O. KozionovaSummaryThe authors summarized and systematized the available data of the structure of the void space and complex carbonate reservoir types. The data of the well logging for about 500 layers of carbon rocks of the Rudenkivs’ko-Proletars’ka area (Dnieper-Donets Basin) were used. This area includes 7 deposits: Bagatoys’ke, Gnatívs’ke, Leventsívs’ke, Machus’ke, Novomikolaivs’ke, Pereshchepins’ke and Yur’ivs’ke. The materials of the national funds and the data base of Taras Shevchenko National University of Kyiv were attracted.
We have registered the most complex types of the reservoir void space for the Novomikolaivs’ko-Machus’kiy field. This is caused by the significant development of the cavernous voids. More than 35% of the rocks contain the have cavernous porosity. At the same time the cavernous porosity is present only in the 14% of reservoirs for other studied deposits.
These two groups of deposits are characterized by a different structure of the void space: the first group has 43.72% of the fractured-pore and 1.4% pore-fractured reservoirs, and the second group has 5.8% and 58.29% respectively. Moreover, approximately the same number of pure pore (5.8%) and purely fractured reservoirs (about 15%) was found for all deposits in this region.
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Theoretical substantiation of the rock outburst criterion in terms of amplitude-frequency characteristics of an acoustic signal
Authors O. Sdvyzhkova, Yu. Golovko and D. KlimenkoSummaryThe purpose of research. Deriving the criterion of a crack (joint) initiating under simultaneous effect of the rock stress state and elastic oscillations generated by an external source is a research purpose. Determining the quantitative relations to estimate the contribution of oscillations in crack initiation and create a theoretical basis for the improvement of rock burst forecasting technique is a goal as well.
Methods. The brittle failure theory and a time-space approach are applied to determine a critical length of initiating cracks depending on stress level and amplitude-frequency characteristics of acoustic oscillations. Analysis of experimental data and comparison with the numerical results is carried out.
Findings. Quantitative ratios between a critical length of the crack, a stress intensity factor, oscillation amplitude and a frequency are determined. It is shown that there are such values of the oscillation frequencies at which the critical crack length is especially sensitive relatively the amplitude alteration. The increase in the oscillation amplitude initiates starting the crack with small length. Numerical estimation is made for close-grained sandstone using such characteristics as crack resistance factor and Rayleigh’ wave velocity and tensile strength. Increasing the amplitude twice at the frequency of 1145Hz causes the reduction of starting crack length 3 times. Numerical results correlate with in situ data related to acoustic predicting the dynamic phenomena in the rock mass.
Originality. The crack initiation criterion has been identified.
Practical implications. Quantitative relations between stress components and amplitude-frequency characteristics should be used to improve the outburst forecasting technique and increase the reliability of dynamic effect prediction.
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Software of “KERN-DP” automated system of the rocks anisotropy analysis
Authors Y.A. Onanko, S.A. Vyzhva, A.P. Onanko, A.V. Shabatura, R.V. Homenko and A.N. OnischenkoSummaryThe determination method of the distributing function of microcracks orientation is developed from data of the azimuthal measurings of elastic waves velocities in rocks. The software “KERN-DP” is developed for the automated system of analysis of rocks anisotropy parameters. The automated system of the anisotropy ultrasound measurings data treatment of velocities in rocks is built on windows principle. The structure of database is developed on language of mySQLinformation, physical properties, the special procedures of data management are developed. The Volyno–Podol's'kogo region sandstones, limestones anisotropy is conditioned by the texture features, by the ordering of the structuremorphlogical paragenesis, the different lithology, which show up in striped and linearness, related to trivial – by lentiform development of striped and fissility. This anisotropy is complicated by the lay over microcrack ordering, which are determined by the different degree of diagenetic changes, the real state of sandstones, limestones.
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The structural thermo-atmo-hydro-geochemical research of the Sribnyanska depression
Authors I.D. Bagriy, V.A. Glon, A.P. Kulish, K.M. Starodubets and Yu. K. GordieievaSummaryHydrocarbon research and forecasting of perspective objects at the Sribnyanska depression was carried out. Geological and geophysical data were compared with the interpretation results of satellite imagery. Distribution profiles of temperature, gas-emanation indicators include radon, toron, hydrogen, helium, carbon dioxide and methane with its homologues were built. The integrated STAGR methodology is focused on clarifying the structure of the fault-block area of research, the selection of network fault zones of high permeability different levels (which determine the field of modern surface discharge fluid-gas flows) and on this basis the selection of stable blocks geodynamic favorable for the accumulation of hydrocarbons. The forecast of promising areas of the Sribnyanska depression was made according to the results of atmogeochemical parameters distribution analysis.
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The interconnection between surface settling and rock capacity margins (illustrated by Kalush-Holyn potassium salt field as an example)
Authors E.D. Kuzmenko, S.M. Bagriy, I.V. Chepurnyi and U.O. DzobaSummaryThe damage of rock mass due to mining as a means of minerals extraction is mostly connected primarily with subsurface voids whose volume may be as large as tens of millions m3. It causes rock mass deformation and therefore the soil surface. In order to prevent dangerous emergency situations (DESs) of geological nature are used different methods.
The work proposed is aimed at resolving specific problems concerned with the current issue mentioned. Besides, among other geological and mining spacial factors, the authors study the capacity margin factor and prove that its role is dominant in surface settling. To illustrate the problem and solution, the reference is made to Kalush-Holyn potassium salt field. The practical implication of the model developed is the possibility to assess the level of surface deformation using the capacity margins factor of pillars for mining potassium salt fields.
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Nanotechnologies and the problem of oil production intensification
Authors G.M. Efendiyev, H.H. Guliyev, A.S. Strekov, A.F. Musayev and D.A. AkhmetovSummaryThe results of experimental studies of the effect of the system on the basis of metallic and organic clusters on the change in the porosity of a porous medium are presented. It is obtained that the developed system is an effective means for regulating water permeability of a porous medium.
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New geophysical data about the Pacific Margin Magnetic anomaly (PMA) sources and some features of the Western Antarctica geodynamic processes
Authors V.D. Soloviev, V.G. Bakhmutov, I.N. Korchagin, S.P. Levashov, N.A. Yakymchuk and D.N. BozhezhaSummaryNew geophysical models of the Earth’s crust and upper mantle were used to study the possible nature of the Pacific Margin Anomaly (PMA) near the Antarctic Peninsula (AP). Active tectonic processes in the Mesozoic – Cenozoic resulted in the complex evolution and the magnetic sources of PMA along the AP margin forming. The PMA-batholith consists of a series of plutons with different ages, composition and magnetization. Spatial heterogeneity of the various segments of PMA can also be associated with a variety of depth, power and magnetic susceptibility of individual units that form the source of regional anomalies. It is possible that the total anomaly name (PMA) can formally integrate anomalies of different ages and origins. Numerous local young age intrusions form an additional PMA horizon of magnetized bodies associated with volcanic processes at the top of the crust. Some segments of the PMA may be associated with the processes of tectonic changes near the Antarctic – Scotia paleo-plate boundary, as well as tectonic and magmatic processes in the areas of paleo rifts structures detection. New geophysical results for different PMA – segments from the Palmer Land to Powell Basin may generalize current ideas of sources and origin of this positive magnetic anomaly.
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The study of geoelectric methods of the current component of the flooding of the southwestern part of Kryvbas
Authors P. Pigulevskiy, V. Svistun, S. Slobodyaniuk and O. KyryliukSummaryThe investigations were obtained maps, allowing to clarify and specify state features of geoelectrical southwest Kryvbas as in three-dimensional space and time – the period from 2008 till 2012. Analysis of resistance geoelectrical changes during this period allowed to establish their connection with fluctuations in water levels in boreholes and hydrogeological wells and obtain analytical equations to determine the component of “flooding” in the first surface of the aquifer. Using of analytical equations allows to build the productive map that shows the impact of natural processes and waterworks in the area of research at the period of four years.
The technology research can quickly identify areas of flooding and chart geoelectric methods and enhance detail engineering-geological zoning for complex study of technosphere impact on the geological environment of Kryvbas. Identify areas of negative geological manifestations (failures, landslides, flooding) and make a forecast of their further development. The resulting features of modern technological component “flooding” for the period from 2008 till 2012 shows that it is not uniformly held, but mosaic, which allows to localize places for the implementation of priority measures of ecological security in South-West of Kryvbas.
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Active tectonics and deformation patterns evidenced from new Chirp seismic data from Marmara Sea, Turkey
More LessSummaryThe northern branch of the North Anatolian Fault (NAF) zone is the most active tectonic element in the Marmara Sea and responsible for most of the seafloor and subsurface deformations observed along the northern shelf. Various of these deformations are determined by using Chirp data. In this context, Chirp seismic data were conducted in 2015. A total of 500 km Chirp data have been interpreted to reveal the structural features of the basement rocks covered with late Quaternary sediments along the northern shelf. The sediment thickness of the thin overlying seismic unit (U2) increases close the coastline and beyond the shelf break. The lower unit (U1) gradually thins in the middle of the shelf and towards the shelf break in the study area; mostly under the control of the terraces observed on top of the U1. All faults and tectonic deformation have only been observed under this Holocene unit. It is merely observed tectonic features (folding, undulation, faults) in the U1. The Holocene unit covered not only the tectonic structures and faults below the truncational erosion surface but also the older lithology, mainly folded and sometimes tightly folded.. The faults in the lower unit actually have low seismic activity.
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Modeling of stress-strain state of rocks during coal deposits exploration
Authors O.M. Ivanik, V.V. Shevchuk, M.V. Lavrenyuk and M.V. SavelievSummaryStudying the values and the distribution of natural stresses in rock complexes of uniform and non¬uniform structures is a complex problem due to the fact that there are numerous effecting natural geological and anthropogenic factors and forces. The most reasonable way to conduct studies of the stress-strain state of anthropogenically changed rock mass during the development of stratified coal deposits is to use the method of continuum mechanics, which are based on both analytical and numerical solutions, and the data of in-field and laboratory experiments. When modeling the working-out of coal-bearing strata in flat setting (plane strain), characteristic cross-sections for different zone workings were reviewed. The algorithm for computation за the stress-strain state using the analytical method was analyzed. With the purpose of determination of stresses around a working, we used the solution of the plane problem of the elasticity theory about semi-infinite mass, constrained by the land surface and weakened by the working. The criteria of correctness of the solution were defined, which are determined by way of verification of boundary conditions. With the purpose of solving the problem of distribution of stresses in a mass which is modeled with a linearly deformed media around a working of an arbitrary shape of cross-section, the relevant form of the mapping function of the unit circle on the working shape of an arbitrary shape was determined.
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3D density and magnetic models of the Mid-Norwegian continental margin
Authors Y. Maystrenko, L. Gernigon, A. Nasuti and O. OlesenSummaryAn integrated 3D density/magnetic modelling has been carried out in the framework of the Crustal Onshore-Offshore Project (COOP2 project). We have made this modelling in order to reveal the regional structural pattern of the Mid-Norwegian continental margin and adjacent areas. Construction of the 3D density/magnetic model has been carried out by use of recently published/released structural data. The 3D density and magnetic modelling itself has been performed using the software IGMAS+ (the Interactive Gravity and Magnetic Application System). The obtained lithosphere-scale 3D structural model represents a first-order approximation of the geometries of the sedimentary infill as well as of the underlying crystalline crust and lithospheric mantle beneath the area under consideration. The configuration of the modelled crystalline crust is consistent with the long-wavelength components of the observed gravity field over the Mid-Norwegian continental margin and adjacent continent. Moreover, the results of the 3D magnetic modelling demonstrate that the 3D density/structural model has to be sub-divided into crustal blocks with different magnetic properties, indicating that these magnetically-derived smaller crustal blocks could lithologically differ from the rest of the initially density-based larger layers.
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Geoinformation modeling complex expert assessment of regional geology models
Authors I.P. Dolinskiy, A.A. Haharin and A.P. LobasovSummaryThe report presents the functionality of geo-modeling expert complex (GMEC). GMEC complex provides: creating models of regional facilities, storage, processing and visualization of geological and geophysical information, spatial analysis models. These materials opportunity to realize the program is user-friendly software system for building and analyzing models of regional geological sections in a given area surveillance. Mapping interface system using conventional geological terminology and focuses on professional geologist-geophysicist. The system is tested on a real geological materials and found a favorable response among geologists.
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Dynamics of the chalk strata state’s change on the territory of the Rivne NPP and the forecast until 2025
Authors S. Vyzhva, V. Demidov and K. IvanchenkoSummaryData analysis of the current state and density of chalk strata forecast on the territory of the Rivne NPP industrial area are presented in the paper. The authors carry out the analysis of monitoring observations of changes of the chalk and loamy soils strata states that overlap it since 1984. In particular, the dynamics of the change in the state of the chalk in the № 62 well was analyzed. In addition, a forecast of chalk strata state’s change on industrial area was made until 2025 and the general trend of chalk strata state change in 25 wells was illustrated. For the forecast the autoregressive integrated moving average was used.
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Cross-correlation dependences of rocks petrophysical characteristics in the different PT conditions of experiments
Authors V.A. Korchin, E.E. Karnaukhova, P.A. Burtnyi and M.V. KravchukSummaryOn results the long-term study of physical characteristics of the Ukrainian shield mineral formations a search and analysis of cross-correlation dependences is conducted between elastic-density, thermal, magnetic and by electrical parameters of rocks, their mineral composition, structure-texture features at the different thermobaric regimes of experiments. Such information is needed for the detailed interpretation of materials of the field geophysical observations at creation of complex deep petrophysical lithosphere models.
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Geoelectric Model of the Undermined Rock Mass
Authors A.V. Antsiferov, L.A. Ivanov and V.V TumanovSummaryThe model has been developed in which by the resistivity of lithologic-and-stratigraphic units determined before and after coal seam winning the undermining impact area was recognized. This area breaks down into two flexure zones respectively, without and with discontinuity of rocks. The model is described as physico-geological basis for the use of EM sounding to predict hazardous mining-and-geological events that result from coal winning and to evaluate rock mass as methane reservoir produced after coal seam was taken away.
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Magnetic field of the Kamennomogilskyi swarm of the Eastern Azov region and its magnetic model
Authors E.P. Gadiatska, M.I. Bakarjieva, A.V. Marchenko and G.E. IvankevichSummaryThe results stated in this report are received on the basis of the qualitative and quantitative analysis of the geomagnetic field according to aeromagnetic shootings and land profile observations in a complex with geological data. Structural-geological and magnetic characteristics of the Kamennomogilsky dyke swarm are provided. Spatial analysis of dykes swarms concentration of accommodation and its relationship with inhomogeneities of crust deep structure was completed. It is shown the results of modeling of the Kamennomogilskyi dyke swarm.
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Modelling of the microstructure of a clastic oil and gas reservoir rock
Authors V. Berezovskiy and M.G. GubaidullinSummaryIn the mathematical modeling of the macroscopic properties of porous media, there is a task to do 3D reconstruction of the core microstructure and to estimate the relationship between the geometry of the microstructure and its macroscopic physical properties. The paper considers the process of modeling the core pore space and the evaluation of its permeability and the method for constructing geometry framework of the core, based on the molecular dynamics. The results of numerical calculations and their comparison with the full-scale experiment has been reported.
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