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Engineering and Mining Geophysics 2019 15th Conference and Exhibition
- Conference date: April 22-26, 2019
- Location: Gelendzhik, Russia
- Published: 16 April 2019
1 - 20 of 110 results
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Features of Oil Well Killing in Abnormal Carbonate Reservoirs Operating Conditions
Authors A. Bondarenko, S. Islamov, D. Mardashov and T. MingalevaSummaryDuring the well killing process, significant gas breakthroughs and fluid loss are observed at the oil and gas condensate field in Volga-Ural province, which requires significant usage of blocking compositions and increases the well service costs. Designed well killing technology should ensure minimal well killing fluid penetration into the reservoir and prevent a gas breakthrough. The paper presents theoretical, experimental and analytical work, the result of common and developed by the author research methods. Laboratory experiments were conducted on modern high-precision equipment with maintenance of in-situ conditions.
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Measurements of Water Resistivity Being at Contact with Soil
Authors A.S. Dernova, D.I. Matveychuk and V.A. ShevninSummaryIn the papers of G.E. Archie and V.N. Dakhnov was estimated dependence between resistivity (or conductivity) of soil and porous water. Existence of such dependence shows that we should know water resistivity, that means study it at each fieldwork area. Sometimes places for measurements of underground water resistivity at each area are restricted, in such case we can measure water resistivity in puddles. Water in puddles immediately after rain has no relation with soil resistivity. The purpose of our study consists in determination the rules of ionic exchange between soil and rain water in time. In the paper (Brunet et al., 2010) the authors demonstrated results of water resistivity measurements at contact with soil in time. They found that two days after the rain water resistivity is close to value of underground water. We wanted to check results of that experiment. Our data in the whole coincide with Brunet results, but are slightly different in details.
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Quality Control of Electrotomography Data and the Problem of Strong Interference
By V.A. ShevninSummarySimple and comprehensible technology of electrical resistivity tomography (ERT) quality control can be inversion accuracy. When this accuracy is unacceptable one need additional estimations of quality control: pseudo crosssections visualization, decrease of signal with array distance at sounding curves, statistical distributions of sounding data with array distance, diagrams of current and voltage signals, estimation of practical ERT depth and its comparison with maximal depth in such conditions. These ERT quality control estimations we applied to ERT data obtained at some study area in Moscow region with average inversion error 26.6% and maximal one above 40%. The main cause of bad ERT quality was high level of 50 Hz industrial noise. In such condition we need such ERT instrumentation that instead of high measuring speed can give us high ERT data quality.
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Identification of Sp Anomalies' Nature to Distinguish Between Filtration and Diffusion-Adsorption Origin of Sp Anomalies
By V.A. ShevninSummaryFrequently SP anomalies of DA origin considered as filtration anomalies that is case of false discovery. In nature DA anomalies are widespread while filtration anomalies are more rear. To distinguish these anomalies we should consider correlation of SP potential and apparent resistivity values along the same profile. In case of DA anomalies there is linear correlation between SP potential and logarithm of apparent resistivity. Some examples of SP anomalies are considered
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Application of A Mathematical Model of the Capillary Curve to Elaboration of the Water Saturation of Rocks
Authors Y.V. Martynova and S.P. MikhailovSummaryIIn this work a model for reconstructing the value of the residual water saturation of rocks by fitting an approximating function to the experimental data of capillarymetric studies is used. Using the obtained values of residual water saturation, the coefficients of the J-function Leverett are restored.
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2D Inversion of Ert Data Using Apparent Polarizability Curves
By V. KulikovSummaryIn the past two decades, automatic 2D inversion of ERT has been widely used. If geometrical soundings are carried out with measurement of the induced polarization, then one can interpret the curves of apparent resistivity and apparent polarizability with obtaining two deep-seated models - geoelectric and polarization. In the 1D version of the interpretation, the curves of apparent resistance and apparent polarizability were selected simultaneously in manual or semi-automatic mode. Two-dimensional inversion is often carried out completely automatically. As a rule, in the first stage, the inversion of the curves of apparent resistance is performed to obtain a deep model of resistivity, and in the second stage, the inversion of curves of apparent polarizability is already performed. This is the correct approach, since the two physical parameters obtained are related to each other. However, in some situations, the use of a resistivity model in the inversion of apparent polarizability leads to a deterioration in the result and an erroneous polarization model is obtained. This is especially noticeable in the case of inversion of low-quality data obtained under conditions of strong interference and with a low ratio of useful signal to noise. Our experience in the interpretation of ERT data shows that in some cases, the result of inversion of the curves of apparent polarizability without considering the resistance model provides a more consistent with the geology and balanced polarization model.
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Enhanced-Power Ground Penetrating Radar Survey and Electrical Resistivity Tomography of Geological-Engineering Structure for Groundwater Filtration Zone Research
Authors E.V. Ageenkov, Y.F. Kovalsky, A.V. Morov and A.V. ZyryanovaSummaryCarried out enhanced-power ground penetrating radar (EPGPR) survey and electrical resistivity tomography (ERT) of geological-engineering structure for groundwater filtration zone research by Vilyuiskaya GRE and Yakutniproalmaz Institute. It used EPGPR Loza-2N and the ERT apparatus Skala-48. Measurements by a highfrequency electromagnetic field and measurements by direct current were made in different seasons, in winter and summer, respectively. The survey results are compared with the available observation wells. There is a well similarity of the survey results by two methods, and consistent with a priori information.
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Tectonic Dislocation of Rocks of the Sedimentary Sequence and Its Relationship with Kimberlites According to the Data of High-Resolution Seismic Survey Mov-Ogt (for Example, Kimberlite Fields of the Yakut Diamondiferous Province)
More LessSummaryThe data of high-frequency seismic surveys carried out on two kimberlite fields of the Yakutsk diamondiferous province are presented. Analysis of the results indicates the relationship of increased deployment of rocks of the host strata with kimberlites
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Studying and Diagnosis of Subsidence and Failures of Soil in St. Petersburg with Geophysics
By A.F. VolyninSummaryDue to the large development of subsidence and failures in St. Petersburg, there are problems with determining the causes of their formation and connection with underground utilities. The relevance of the work is caused by the fact that subsidence and failures pose a threat to the safety of traffic, for the technical condition of underground utilities and cause violations in the structures of buildings and structures. To this end, the technical diagnostics Service of SUE «Vodokanal of St. Petersburg» develops a method of their examination by a set of geophysical methods. In the report the characteristic of subsidence and failures is given, the technique of their geophysical survey and examples of the results of geophysical survey of the most common subsidence and failures are given.
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Experience of Gpr Study of Terraces in the Valleys of the Katun' and Inya Rivers in Gorny Altai
Authors L.B. Volkomirskaya, V.V. Varenkov, O.A. Gulevich, A.V. Panin and A.E. ReznikovSummaryPreliminary results of data interpretation of the method of reflected electromagnetic waves (MREW) show that using MREW it is possible to determine a section of the terraces revealing blocks and large boulders at different levels of the section. In general, a comparison of the geoelectric and geological sections showed the correspondence of the thickness of the terraces determined with MREW and the fixed outcrops. Due to the equipment we used we received deep reflections at 180 meters, which corresponded to the edge of the river. The analysis and interpretation of the MREW field data allow carrying out the separation of the section layers corresponding to the sandstone and pebble formations of the Ininskaya and Bashkauskaya suites, as well as distinguishing areas with different moisture content of the upper layers.
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Study of the Permafrost Boundaries and Determination of the Thickness of the Gas Hydrates Layer on the Yamal Peninsula
Authors L.B. Volkomirskaya, O.A. Gulevich and A.E. ReznikovSummaryWithin the surveyed site with horizontal and depth resolution of 1–2 meters, the lower boundary of permafrost rocks was determined at a depth of over 140 m and a layer of gas hydrate inclusions with a thickness of up to 20 meters was recorded, lying at a depth of 60–80 meters. Today, when creating ground-based infrastructure in the Arctic, the MOEVM technology is quite competitive with areal surveys among any traditional geophysical technologies.
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Physical Principles of Deep Georadiolocation
Authors L.B. Volkomirskaya, O.A. Gulevich and A.E. ReznikovSummaryBased on the theoretical and numerical analysis of the interaction of video pulses containing only one or a few field oscillations with material media of different composition including dielectrics and conductors the main differences in their distribution and reflection are given. It is shown that traditional methods for solving Maxwell equations using the separation of variables and Fourier transforms are convenient for describing quasimonochromatic waves with a slowly varying amplitude and phase, but ineffective for the analysis of nonstationary and non-harmonic fields. It is shown that it is necessary to take into account the features of propagation and reflection of video pulses when designing geo-radars in order to achieve the maximum probing depth altogether with the best resolution in a single product. A comparison was made of theoretical conclusions on the propagation of video pulses in the medium and numerical models with experimental data obtained in field experiments using equipment of the GROT 12 model range, which designed taking into account the interaction of powerful video pulses with various natural media.
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Refraction Seismology - A Tool for Shallow Subvertical Objects Exploration
Authors A.S. Borisov, N.V. Bogov, M.Y. Borovskij, E.M. Nurieva and E.E. AndreevaSummaryApplication of refraction seismology for shallow subvertical objects exploration is considered. Shot profile geometry of a refraction arrival is presented. Values of seismic migration in depending of geological parameters are calculated. Exactitude of the velocity analysis is estimated.
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Substantiation of the Optimal Gis Complex for the Allocation of Water-Containing Reservoirs on the Example of the Analysis of Well Logging Results in the Leningrad Region
Authors A.A. Miller, G.D. Gorelik and L.M. BudanovSummaryThe material of the logging of wells for water production in the Leningrad region discussed the effectiveness of different logging techniques (electric resistivity, self-polarization, caliper logging, acoustic wave, gamma ray) for the selection of reservoirs in various geological conditions. Optimum complexes of methods for wells in granites and in sandy-clay sections are chosen. A new instrument for wells logging to record simultaneously the gradient - and potential-probes electric are tested.
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Using the Method of Geochemical Analysis to Obtain Paleogeographic Information on the Territory of the City of Kislovodsk and the National Park “Kislovodsk”
Authors V.M. Yakushev, M.P. Sherstukov, A.Y. Tatarskiy, V.V. Yufereva and A.G. SaltanovaSummaryThe method of geochemical analysis was used to obtain paleogeographic information on the territory of the city of Kislovodsk and the National Park "Kislovodsk". The following tasks were solved: regularities of distribution of chemical elements in Early Cretaceous sedimentary rocks were determined to clarify their facies nature; possible sources of demolition and evolution of primary material entering the sedimentation basin was identified; interpretation of geochemical data and reconstruction of possible conditions (morphology of paleobasins sedimentation, features of paleoclimate, paleotectonic regime, etc.) was made. The results of the work will be used to create thematic objects of environmental education and educational tourism of paleontological orientation.
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Electrical Prospecting with Tem and Accounting the Influence of Metallic Technogen Objects
Authors M. Abramov, A. Belaya, E. Goncharov and G. TrigubovichSummaryIn practice the interpretation of data is complicated by the influence of the electromagnetic field of technogen objects located near the measurement area. As a special case the paper considers the influence of underground pipeline systems and their electromagnetic fields that make a significant contribution to the total electromagnetic field from the medium. Their influence should be taken into account when interpreting the data.
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Geophysical Research on Water Bodies
By D. KopylovSummaryThe paper is devoted to the actual topic of geophysical research in the water area in the summer. The results of electromagnetic prospecting methods vertical electrical sounding (VES) and ground penetrating radar profiling of the surface of the river. The prospects of application of electric prospecting methods in the study of geological section of the bottom sediments and mapping of the roof of the rock base are shown.
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Gpr Tracing of Engineering Communications
Authors Z.B. Khakiev, V.L. Shapovalov, V.A. Yavna and K.M ErmolovSummaryThe aim of this work is to study the features of the GPR method that need to be considered when developing the methods for detection, identification and positioning of separately placed communications, as well as toselocated in close proximity to each other. The relevance of such research is obvious for work carried out in urban areas within dense building, including in the sites of housing renovation.
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Gpr-Based Moisture Content Determination in the Ground Construction Layers During the Construction of Subgrades
Authors V.L. Shapovalov, M.V. Okost, A.A. Vasilchenko and V.A. YavnaSummaryRoad construction projects for railways and highways establish the required roadbed compaction rates. When carrying out construction work, obtaining the desired indicators depends on the accuracy of measuring the moisture of the soil material, and the technology for bringing the moisture to the optimum level. This study is aimed at the developpment of a GPR technology for determining the moisture content of soil materials of structural layers prepared for compaction work during the construction of roadbeds of railways and highways. Experimental measurements are performed on draining soils represented by fine river sand.
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Ultra-Shallow Seismic Reflection Survey in the Construction and Exploration of Mine Shafts in Salt Deposits
Authors A.G. Yaroslavtsev and T.V. BaybakovaSummaryThis work describes the experience of using engineering high-resolution seismic to identify weakened fractured zones in the salt mines near-shaft space. The results of CDP seismic surveys can be used to make design decisions during waterproof works in mine shafts. The wave fields formation features in the control of ice-wall shaft construction on different stages are presented.
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