- Home
- Conferences
- Conference Proceedings
- Conferences
Engineering and Mining Geophysics 2018
- Conference date: April 23-27, 2018
- Location: Almaty, Kazakhstan
- Published: 23 April 2018
61 - 80 of 149 results
-
-
Quality Control and Processing of the Two-leveled Three-frequencied Observation System Data for Dynamic Analysis
Authors R. Isaenkov, V. Ivanova, A. Ponimaskin and M. TokarevSummaryTo assign potential geological hazards we have to conduct a set of engineering geological investigations, including direct exploration methods (engineering drilling, sampling) and remote geophysical methods. The most suitable remote method for quantitative analysis of soil properties is multi-channel HR and UHR (0.3–3 kHz) seismic survey. It is necessary to supplement the standard interpretation approaches with a complex analysis of the kinematic and dynamic features of the reflected waves for effectively solving of geological tasks). For this purposes we use dynamical and kinematical wave field parameters. In turn, dynamic and kinematic analysis makes certain demands on the quality of the initial data and the subsequent processing procedures. In this paper, we consider the main approaches to quality control and data processing of two-level multifrequency observations in the RadExPro software package.
-
-
-
Different Scale Complex Airborne Geophysical Survey In the Central African Ridge Area
Authors V.M. Kertsman, J. Moilanen, Yu.G. Podmogov and A.K. VolkovitskySummaryWe review the results of different-scale airborne geophysical survey performed in the territory of the Republic of Rwanda. Such parameters as the modulus of the magnetic field vector, electromagnetic sounding data in time and frequency domain, as well as data from a gamma-ray spectrometer with a total scintillator volume of 32 liters were continuously recorded during the flight. Automated execution of flight tasks allowed to exclude an operator from the surveying process. It took only 6 months of field works to perform the survey. The total workscope amounted to 57,718 line km. Based on the results of interpretation we selected prospective sites for further study. Detailed airborne survey was performed for 5 sites, and ground geological and geophysical survey was performed for 3 sites. Based on the detailed survey results we selected new local objects associated with quartz-magnetite veined mineralization, dyke bodies, and mafic rock intrusions. Multiple pegmatite intrusions were identified. The information about magnetic, electrical and radiometric characteristics of rocks allowed to reliably classify the identified objects.
-
-
-
Gas-saturated sediments study in the upper part of the geological medium using ocean bottom nodes
Authors V.V. Polovkov, Nikitin A.S, D.A. Popov, P.A. Maev, E.A. Birukov and M.YU TokarevSummaryIn this article the authors demonstrate the initial results of experimental work done with the help of ocean bottom nodes and an electric spark source, to assess the feasibility of the technology for the study of gas-saturated sediments. The results showed that this approach is promising. In the case of gas-saturated sediments spread widely through the investigated area, an air gun (1–2 litres) is recommended. In this case, it would be necessary to work out the optimal technique and technology for production surveys, data processing and interpretation. Further experimental work in the use of a small volume air gun and the development of new production methods is recommended.
-
-
-
Acoustic Flow of Reservoir Fluids in the Pore Space
Authors A.A. Abdrashitov, A.G. Gavrilov, A.R. Galimzyanova and E.A. MarfinSummarySeismic impact on geological environments leads to acoustic currents in the pore space of reservoirs. In the present work, the structure of the flow of fluids in the pore under the conditions of superimposed oscillations was studied by numerical simulation. Pore walls were not deformed and, as a consequence, the peristaltic mechanism of flow intensification was not taken into account. The performed calculations based on the solution of the Navier-Stokes equations showed that a longitudinal elastic wave generates acoustic currents and induces a fluid flow inside the pore along the direction of wave propagation. The average velocity of such a flow is comparable with the rate of fluid filtration in productive layers. It is shown that the velocity of such a flow depends strongly on the amplitude of the oscillations of the acoustic action. The results obtained substantiate the wave methods of impact on the formation to improve the efficiency of oil production.
-
-
-
Ancient Graves Detection Using ERI on Archaeological Site of Eski - Iurt in the Crimea
Authors I.N. Modin, A.A. Pelevin, D.V. Makarov, D.A. Kvon and S.A. AkulenkoSummaryOn archaeological site of Eski - Iurt in the Crimea which is a Bronze Age burial mound before the archaeological excavation the geophysical surveys were performed. Electrical resistivity tomography (ERT) method showed strong results in artifacts detection including graves delineation which were confirmed by following archaeological excavation.
The key parameters of successful ancient graves detection using ERT are: detailed profile network with small electrode spacing, low geological noise level and geophysical preliminary surveys to calibrate acquisition technique and to make sure that electrical resistivity of graves is contrast enough to be separated from the rest of cross-section
-
-
-
Issues of Seismic Hazard Assessment for Sites and Design Basis for Nuclear Power Plants
Authors S.F. Aptikaev and O.I. AptikaevaSummaryIn relation to the sites of nuclear power plants (NPP) features of regulatory requirements, seismic hazard characteristics, composition and forms of representation of seismic effects for design basis and safety analysis of NPP are considered. These topics are considered in the context of interaction between researchers, designers and regulatory bodies.
-
-
-
Relief and Electrical Resistivity Tomography
Authors I.M. Modin, K.I. Baranchuk, B.G. Mukanova and T.M. MirgalikyzySummaryCurrently geophysicists actively using the method of ERT for a wide class of geotechnical problems. The main types of distortion electrical fields on different forms of relief are known, and in all inverse programs provides for the consideration of the influence of topography. But issues remain with the accuracy of the calculation of the direct problem, which is embedded in the inverse problem, not the known values of the critical angles of the terrain that can cause the strong distortion of the field. Therefore, the question about the influence of the topography of the land results two-dimensional inversion of electrical tomography data is the actual geophysical problem.
To solve this problem, the authors performed physical modeling on large homogeneous sand embankment with artificial complex surface topography. The mound was located on a laterally homogeneous loamy earth’s surface. This experiment allowed us to identify false anomalies that were the result of a two-dimensional inversion for geoelectric sections. In addition, the simulation in the laboratory in a rectangular tank filled with cellulose-hydro gel mixture. The result has been allocated 2 types of severe anomalies of the electric field. Considered resistivity section obtained by inversion. It is shown that on steep bends of the relief 2D-inverse program is not well cope with this task. So about the anomalous zones are formed on the geoelectric section which can explain how some objects, which actually does not exist.The same findings confirmed by theoretical modeling with means of integral equations.
-
-
-
Potentially Dangerous Zones Investigation on the Mine Fields by Methods of Ground and Borehole Seismic
Authors V.P. Lisin, A.V. Chugaev and I.A. SanfirovSummaryIn the present paper concerning the results of surface and borehole seismic integration for estimation of undersalt rock massif condition and vertical jointing zone location on the undermined territory with accelerated subsidence of ground surface. Waterproof condition control by surface seismic allows marking abnormal zones related with both the geological specifics and mining impact. At the same time velocity estimation of the cross-section has integral type and its resolution is much lower than for time sections. For reliable abnormal zones location in the potentially dangerous area a significant increase in the carrier frequency of the desired signal is necessary. With this design different borehole seismic methods are tried out. Notably offset and inverted VSP with areal data collection system and crosswell measurements. This approach allows to substantially eliminate the filtering effect of the loose part of the section and obtain the resolution of velocity distributions higher than for ground-based seismic surveys. Interpretation and analysis of vertical and horizontal sections of designed velocity model permitted to reveal and allocate a number of narrow abnormal zones with low P-wave velocity.
-
-
-
Geological and Geophysical Assessment of Eluvial Soils As Bases of Buildings and Structures
Authors D.V. Bobrov, V.B. Pisetskiy and M.N. TominSummaryThe historical stage of geological development of the Earth determine the development of the formation of special genetic types on separate areas in the result of weathering of the original rocks. These eluvial soils form weathering crust.
In the Urals the eluvial soil developed almost everywhere and differ from other general types of soil in the specifics of the condition and properties.
For today, increasing trend towards construction of tall buildings in terms of growth of urban agglomerations. Engineering development of new territories has a number of problems.
One of the problems associated with ways of investigation of strength and deformation characteristics of eluvial soils, which deposit at the base of the designed buildings and determine their stability.
Another problem associated with the evaluation of the obtained reliability of the engineering-geological mining, which are used in design calculations.
This article focuses on possible ways of solving above problems by integrate is of different research methods on example of the construction site, which is located within the largest city of the Urals region - Ekaterinburg.
-
-
-
Possibilities of Application of Researches of an Electromagnetic Emission at Geodynamic Monitoring of Mineral Deposits
Authors O.M. Beloslydtsev and G.I. MaslatcovSummaryResults of the analysis of parameters of an electromagnetic radiation (EMR) on the Almaty prognostic ground on purpose are given. selections of near-term harbingers of the strong earthquakes in Northern Tien Shan. Communication of anomalies of EMI with the mode of weak seismicity during the periods of preparation of tectonic earthquakes is revealed. The prospects of application of filing of EMI at prediction are shown including technogenic earthquakes
-
-
-
Unexpected Dependence of the Late-time Transient Response on the Size and Configuration of a TEM Array
Authors M.V. Sharlov, N.O. Kozhevnikov and I.A. ShelokhovSummaryThe paper discusses decrease in the decay rate of the TEM response in cases when TEM soundings are performed using central loop arrays with small-sized transmitter loops. This effect is not related to geology and, other things being equal, the more noticeable the smaller the transmitter loop and the more resistive the earth. The effect is not observed when the receiver loop is located outside the transmitter loop. We give examples of the decrease in the TEM response decay rate for sites with different geology. The nature of the effect remains not clear. Further research is needed to gain insight into this phenomenon.
-
-
-
Forecasting Gas-condensate Reservoir Performance With Capillary Pressure Effect
More LessSummaryPhD. Researcher - Department of Production and Exploitation of Oil and Gas Fields
-
-
-
Calibration and Transformation of Signals From Compact Equipment for Shallow Induction Studies
Authors D.I. Fadeev, E.V. Balkov, Yu.G. Karin and G.L. PaninSummaryThe paper presents a new approach to the solution of the “direct field” problem and its implementation in compact electromagnetic equipment. Data on the development and implementation of the calibration method are presented. Some aspects of the express transformation of the primary signal into apparent resistance are highlighted.
-
-
-
Monitoring of Soil Radon in the Almaty Megapolis for Monitoring Seismic Activity
Authors G.E. Tukeshova, M.H. Aliev, T.S. Zhunisbekov, A.O. Muhamadiev and Zh.B. KoblanovSummaryField experience studies of geochemical sounding of active faults in the territory of Almaty on the basis of profile measurements of the volumetric concentration of soil radon (Rn222)
-
-
-
Geoengineering Researches for the Restoration of the Lands Disturbed by Mining Operations
Authors G. Pospehov, K. Pankratova and I. StraupnikSummaryDuring the deposit developing there is continuous growth of territories disturbence at essential lag of their recultivation and return to the national economy. At the same time closing of the mining enterprises, besides improvement of an ecological situation, leads to activization and emergence of the new dangerous geological processes and the phenomena capable to affect strongly geoengineering conditions of the former developments territories. The Russia’s statistics of waste emergence and neutralization is shown. It is presented that geoengineering ensuring of mining excavations elimination and projects on land reclamation on mineral deposits are developed in insufficient degree. It is proved that there is a need of carrying out of special geoengineeringresearches for development of recultivation projects. On the example of a pit flooding it is shown role of the monitoring for identification of dangerous geological processes and for the forecast of their development. The data of deformations observations of the land surface confirm a possibility of restoration underground waters levels raisings after closing of the mining enterprises.
-
-
-
Methodical Guide in the Study of Hard to Access Geologic Cross-sections With Using of SUAV at the Pechishi Stratotype As an Example
Authors A. Starovoytov, E. Korolev, A. Eskin, I. Chernova and T. RahmatullinSummaryThe method of studying hard to access geologic cross-sections using unmanned aerial vehicles in combination with ground-based photometry is presented in the article. Model of textural ortho-section and the surface relief model in the plane of exposure were constructed based on Upper-Kazanian stage sediments of the Pechishi stratotype. The lithostratigraphic breakdown of section was carried out based on raster data obtained.
-
-
-
Influence of Electrode Grounding Resistance and Churge-up Effect on Quality of CVES-measurements
Authors A.O. Alymov, E.V. Balkov and V.A. BeloborodovSummaryDC resistivity data by using computer-controlled multi-channel multi-electrode arrays is be popular. While, acquisition speed are enormous, optimization of the measurement technique is necessary, in order to gather without loss of data quality. The analysis of field data from multi-channel resistivity-meter “Skala 64” shows that electrode charge-up effect is cause significant distortions of measuring potentials. This effect can be larger than the induced signal and have a significant amplitude during all time of measurements. Influence of electrode grounding resistance is much lower. An algorithm for linear correction had been realized and tested. If there is a short delay before measuring potentials is provided after an electrode is used for transmitting current, correction of the linear drift allows to exclude influence of charge-up effects.
-
-
-
The Inflow of Liquid to a Horizontal Well With Acoustic Impact on the Formation
Authors A.R. Galimzyanova, R.N. Gataullin, E.A. Marfin and B.R. FasfievSummaryThe present work is devoted to increasing the efficiency of development of an oil field by horizontal wells due to the effect on the productive layer of elastic vibrations. Based on the results of laboratory studies, the viscosity of oil and the increase in the permeability of the formation have been accepted as mechanisms of acoustic action on a saturated porous medium. The influence of the wave action on the oil production process is considered using a mathematical model of fluid inflow to a horizontal well, taking into account the features of filtration in conditions of inhomogeneity of the properties of the formation and fluids. It is shown that the frequency and amplitude of the oscillations are the main factors of increasing the production rate of a horizontal well. At low frequencies, the effect of increasing the flow rate is weak, and at frequencies above 2.5 kHz, the increase in the production rate of a horizontal well is practically proportional to the increase in frequency. The obtained modeling results are in quantitative agreement with the results of the field data.
-
-
-
Comparison of Results of 1D and 2D Inversion of TEM With Software “Zond” When Exploration of the Kimberlite Bodies
Authors A.V. Muslimov and V.L. LukhmanovSummaryThe article discusses the results of 1D and 2D interpretation of the results of the TEM soundings on one of the test sites for geophysical studies. A comparison with the results of other geophysical methods.
-
-
-
The Use of Scattered Waves for Allocation of Deposits of Potassium-magnesium Salts in the Section of the Upper Permian Halogen Formation and Delineation of Ore Objects
Authors S.A. Shevchenko, E.V. Demidova, E.V. Anokhina, L.F. Zhegalina and M.N. NazarovaSummaryThe study is devoted to the use of the scattered component of the wave field for delineating ore bodies and allocation the deposits of potassium-magnesium salts in the layer of rock salt. This is possible due to the fact that the ore body has a petrophysical heterogeneity, vertical and lateral variability. In the field of seismic waves, it forms the scattering of a passing elastic wave of different degrees, as well as any heterogeneity in all a depth section
-