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тектоническая трещиноватость

Geotechnical Engineering and Engineering Geology
  • Date submitted
    2023-04-10
  • Date accepted
    2024-11-07
  • Date published
    2025-02-25

Consideration of the geomechanical state of a fractured porous reservoir in reservoir simulation modelling

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This paper presents reservoir simulation modeling of a hydrocarbon accumulation with a fractured porous reservoir, incorporating the geomechanical effects of fracture closure during variations in formation pressure. The fracture permeability parameter is derived from the impact of stress on fracture walls. The fracturing parameter is determined based on 3D seismic data analysis. A permeability reduction model is implemented in the tNavigator reservoir simulation platform. The proposed approach improves the convergence of formation pressure dynamics in well data while maintaining flow rate and water cut adaptation accuracy. This results in enhanced formation pressure prediction and optimization of the pressure maintenance system.

How to cite: Kashnikov Y.A., Shustov D.V., Yakimov S.Y. Consideration of the geomechanical state of a fractured porous reservoir in reservoir simulation modelling // Journal of Mining Institute. 2025. Vol. 271 . p. 42-52. EDN BANZQB
Geology
  • Date submitted
    2022-10-29
  • Date accepted
    2023-10-25
  • Date published
    2024-04-25

Assessment of rock massif sustainability in the area of the underground research laboratory (Nizhnekanskii Massif, Enisei site)

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The study presents the results of the research on geodynamic and geological conditions of the Enisei site (Krasnoyarsk Krai), chosen for the construction of an underground research laboratory. The laboratory is being built at a depth of 500 m to assess the suitability of the rock mass for burying high-level radioactive waste. The rocks consist of weakly fractured gneisses, granites, and dikes of metadolerites. Field observations were conducted on bedrock outcrops. They included the determination of rock mass quality indicators, measurement of rock fracturing, and a rating classification of stability using N.Barton's method. GNSS observations were also made to monitor surface deformations. These data were used to develop a three-dimensional structural model, including lithology, fault disruptions, intrusive bodies, elastic-strength properties of rocks, and the sizes of zones influenced by faulting. It will serve as a basis for boundary conditions and the construction of three-dimensional variational models of stress-strain states, identifying zones of concentration of hazardous stresses, and planning in situ geomechanical experiments in underground mines of the laboratory. The obtained values of the modified QR index for the main types of rocks allowed their classification as stable and moderately stable, corresponding to strong and very strong rocks on Barton's scale and the massif rating according to geomechanical classification.

How to cite: Akmatov D.Z., Manevich A.I., Tatarinov V.N., Shevchuk R.V., Zabrodin S.M. Assessment of rock massif sustainability in the area of the underground research laboratory (Nizhnekanskii Massif, Enisei site) // Journal of Mining Institute. 2024. Vol. 266 . p. 167-178. EDN ECCWUV
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2022-06-20
  • Date accepted
    2023-01-10
  • Date published
    2023-08-28

Laboratory, numerical and field assessment of the effectiveness of cyclic geomechanical treatment on a tournaisian carbonate reservoir

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Results are discussed for evaluation of effectiveness of the cyclic geomechanical treatment (CGT) on a Tournaisian carbonate reservoir. Analysis of laboratory experiments performed according to a special program to assess permeability changes for Tournaisian samples under cyclic changes in pore pressure is presented. The main conclusion is the positive selectivity of the CGT: an increase in permeability is observed for samples saturated with hydrocarbons (kerosene) with connate water, and maximal effect is related to the tightest samples. For water-saturated samples, the permeability decreases after the CGT. Thus, the CGT improves the drainage conditions for tight oil-saturated intervals. It is also confirmed that the CGT reduces the fracturing pressure in carbonate reservoirs. Using flow simulations on detailed sector models taking into account the results of laboratory experiments, a possible increase in well productivity index after CGT with different amplitudes of pressure variation was estimated. Results of a pilot CGT study on a well operating a Tournaisian carbonate reservoir are presented, including the interpretation of production logging and well testing. The increase in the well productivity index is estimated at 44-49 % for liquid and at 21-26 % for oil, with a more uniform inflow profile after the treatment. The results of the field experiment confirm the conclusions about the mechanisms and features of the CGT obtained from laboratory studies and flow simulations.

How to cite: Indrupskiy I.M., Ibragimov I.I., Tsagan-Mandzhiev T.N., Lutfullin A.A., Chirkunov A.P., Shakirov R.I., Alekseeva Y.V. Laboratory, numerical and field assessment of the effectiveness of cyclic geomechanical treatment on a tournaisian carbonate reservoir // Journal of Mining Institute. 2023. Vol. 262 . p. 581-593. DOI: 10.31897/PMI.2023.5
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2022-08-01
  • Date accepted
    2022-11-17
  • Date published
    2023-02-27

Use of machine learning technology to model the distribution of lithotypes in the Permo-Carboniferous oil deposit of the Usinskoye field

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Permo-Carboniferous oil deposit of the Usinskoye field is characterized by an extremely complex type of the void space with intense cross-sectional distribution of cavernous and fractured rock. In this study, for this production site, the process of 3D geological modeling has been implemented. At the first stage, it provided for automated identification of reservoir volumes by comparing the data of core and well logging surveys; at the second stage, identification of rock lithotypes according to Dunham classification is performed on the basis of comparison of thin sections examination and well logging data. A large array of factual information enables the use of machine learning technology on the basis of Levenberg – Marquardt neural network apparatus toward achievement of our research goals. The prediction algorithms of reservoir and rock lithotype identification using well logging methods obtained on the basis of the training samples are applied to the wells without core sampling. The implemented approach enabled complementing the 3D geological model with information about rock permeability and porosity, taking into account the structural features of the identified lithotypes. For the Permo-Carboniferous oil deposit of the Usinskoye field, the volumetric zoning of the distribution of different rock lithotypes has been established. Taking into account the lithotypes identified based on machine learning algorithms, density and openness of fractures were determined, and fracture permeability in the deposit volume was calculated. In general, during the implementation, the machine learning errors remained within 3-5 %, which suggests reliability of the obtained predictive solutions. The results of the research are incorporated in the existing 3D digital geological and process model of the deposit under study.

How to cite: Potekhin D.V., Galkin S.V. Use of machine learning technology to model the distribution of lithotypes in the Permo-Carboniferous oil deposit of the Usinskoye field // Journal of Mining Institute. 2023. Vol. 259 . p. 41-51. DOI: 10.31897/PMI.2022.101
Modern Trends in Hydrocarbon Resources Development
  • Date submitted
    2022-09-15
  • Date accepted
    2022-11-17
  • Date published
    2022-12-29

Comprehensive assessment of hydraulic fracturing technology efficiency for well construction during hydrocarbon production

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The oil and gas industry has been an integral and fundamental sector of the Russian economy for the past few years. The main problems of this industry have traditionally been the deteriorating structure of oil reserves; depreciation of main assets; slowdown and decline in oil production. Recently these have been complicated by a number of new negative trends related to underinvestment, limited financial resources, deteriorating access to new equipment and technologies. The task of the research is to make a comprehensive assessment of hydraulic fracturing technology during well construction and to increase the recovery and intensification of hydrocarbons production. In this research, modeling techniques were used to assess the productivity of each fracture. Geophysical methods (seismic survey) were used to determine the geomechanical properties of the formation. Comprehensive assessment of hydraulic fracturing technology during well construction was carried out, which allowed to increase vertical permeability and unite disparate parts of the reservoir in practice, and to determine the development efficiency of the hydrocarbon field.

How to cite: Bosikov I.I., Klyuev R.V., Мayer А.V. Comprehensive assessment of hydraulic fracturing technology efficiency for well construction during hydrocarbon production // Journal of Mining Institute. 2022. Vol. 258 . p. 1018-1025. DOI: 10.31897/PMI.2022.98
Geology
  • Date submitted
    2022-02-18
  • Date accepted
    2022-05-25
  • Date published
    2022-07-13

Remote sensing techniques in the study of structural and geotectonic features of Iturup Island (the Kuril Islands)

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The article presents structural and geotectonic features of Iturup Island, the largest island in the Greater Kuril Ridge, a unique natural site, which can be considered as a geological reference. The structural and geotectonic analysis carried out on the basis of a comprehensive study of the new Earth remote sensing data, maps of anomalous geophysical geophysical fields, and other geological and geophysical materials using modern modelling methods made it possible for the first time to identify or clarify the location of previously discovered discontinuous faults, typify them and determine the kinematics, as well as to establish a more reliable spatial relationship of the identified structures with magmatism with the stages of the geological development of the region. The constructed diagram of the density distribution of the zones with increased tectonic fracturing shows a significant correlation between the distribution of minerals and weakened areas of the Earth's crust and can be used as an alternative method for predicting minerals in the study region, especially in remote and hard-to-reach areas. The presented approach can be extended to the other islands of the Greater Kuril Ridge, thereby bringing research geologists closer to obtaining the answers to questions about the features of the geotectonic structure and evolution of the island arc. The use of customized software products significantly speeds up the process of interpreting a large array of geological and geophysical data.

How to cite: Talovina I.V., Krikun N.S., Yurchenko Y.Y., Ageev A.S. Remote sensing techniques in the study of structural and geotectonic features of Iturup Island (the Kuril Islands) // Journal of Mining Institute. 2022. Vol. 254 . p. 158-172. DOI: 10.31897/PMI.2022.45
Oil and gas
  • Date submitted
    2021-08-10
  • Date accepted
    2021-12-10
  • Date published
    2021-12-27

Possibilities of accounting the fracturing of Kashiro-Vereyskian carbonate objects in planning of proppant hydraulic fracturing

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One of the effective methods of oil production intensification for heterogeneous Kashiro-Vereyskian clay-carbonate sediments of the Volga-Ural oil and gas bearing province is proppant hydraulic fracturing. Prospects of realization for this technology are considered in the article on the example of the Vereyskian development object of Moskud’inskoye field. Based on the analysis of rocks samples investigations of Vereyiskian sediments, lithological types of carbonate rocks differing in their structural features are distinguished. Tomographic investigations of rock samples were carried out, as a result of which the rock fracturing for some lithotypes was determined and studieds. Under natural geological conditions, depending on the degree of fracturing progression and technological conditions of development, these intervals may or may not be involved in well operation. When hydraulic fracturing is performed, potentially fractured areas that are not in operation can be successfully added to oil production. Based on analysis of hydrodynamic well investigations, the fracturing of the Vereyskian object of the Moskud’inskoye field was studied on the basis of the Warren-Ruth model. With the help of geological and technological indicators of development, prediction fracturing was obtained, which was used for the construction of the natural fracturing scheme. Areas of both pore and fractured reservoirs development were identified on the deposit area. As a result of statistical analysis, the influence of fracturing on efficiency of proppant hydraulic fracturing was determined. Based on the linear discriminant analysis, a statistical model for predicting the efficiency of proppant fracturing was developed. It was shown that in addition to natural fracturing, the results are most strongly influenced by specific proppant yield, formation pressure, permeability of the remote bottomhole zone and skin effect. Based on the developed model, prospective production wells of the Moskud’inskoye field are identified for proppant hydraulic fracturing.

How to cite: Votinov A.S., Seredin V.V., Kolychev I.Y., Galkin S.V. Possibilities of accounting the fracturing of Kashiro-Vereyskian carbonate objects in planning of proppant hydraulic fracturing // Journal of Mining Institute. 2021. Vol. 252 . p. 861-871. DOI: 10.31897/PMI.2021.6.8
Geology
  • Date submitted
    2021-01-19
  • Date accepted
    2021-07-27
  • Date published
    2021-10-21

Geological and structural characteristics of deep-level rock mass of the Udachnaya pipe deposit

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For hard rock massifs, structural disturbance is a key indicator of mining structure stability. The presence of intersecting structural elements in the massif reduces rock strength and leads to formation of potential collapse structures. In addition to that, disjunctive deformations that penetrate rock strata serve as channels for fluid migration and connect aquifers into a single system. It was established that the largest of them –faults of east-northeastern, northeastern and northwestern directions – form the kimberlite-bearing junction of the Udachnaya pipe. These faults represent zones of increased fracturing, brecciation and tectonic foliation, distinguished from adjacent areas by increased destruction of the rock mass. Specifics of tectonic fracture distribution within structural and lithological domains are determined by the presence of multidirectional prevailing systems of tectonic fracturing, as well as by differences in their quantitative characteristics. With some exceptions, the main systems form a diagonal network of fractures (northeastern – northwestern orientation), which is typical for larger structural forms – faults. Despite the differences in dip orientation of the systems, most of them correspond to identified directions, which is typical for both kimberlites and sedimentary strata. Overall disturbance of the massif, expressed in terms of elementary block volume, reaches its peak in the western ore body. For such type of deposits, friction properties of fracture structures have average values. Consideration of geological and structural data in the design and development of new levels of the deposit will allow to maintain the necessary balance between efficiency and safety of performed operations.

How to cite: Serebryakov E.V., Gladkov A.S. Geological and structural characteristics of deep-level rock mass of the Udachnaya pipe deposit // Journal of Mining Institute. 2021. Vol. 250 . p. 512-525. DOI: 10.31897/PMI.2021.4.4
Geology
  • Date submitted
    2018-11-23
  • Date accepted
    2019-01-03
  • Date published
    2019-04-23

Structural model and tectonic evolution of the fault system in the Southern part of the Khur area, Central Iran

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In the southern part of the Khur area, there is faults system with predominantly North-West strike. This network of tectonic disturbances is one of the most important fault systems in Central Iran which crosses Paleozoic metamorphic rocks, Cretaceous limestones, and Eocene volcanic rocks. Interpretation of satellite imagery ETM+ (Enhanced Thematic Mapper plus, Landsat) and field observations showed the presence of left-lateral shifts along with fault system. This formed the structure of the branch faults at the northeast end of the main fault. Another feature associated with shear dislocations is the rotation of blocks in the northeastern and southwestern segments of the area under study. There are several basins and positive structures within the area such as a series of uplifts and thrusts, indicating the presence of compressional and extensional tectonics. Another part of the work is devoted to the study of the correlation between active faults and earthquakes. Processing of satellite images, field observations, records of micro-earthquakes within a radius of 17 km made it possible to analyze the earthquakes parameters and the position of tectonic disturbances, and, as a result, confirm the presence of active faults in the region. In addition, we have identified three successive stages of the Khur area tectonics: rifting, contraction, change of convergence and uplift direction.

How to cite: Sohrabi A., Nadimi A., Talovina I.V., Safaei H. Structural model and tectonic evolution of the fault system in the Southern part of the Khur area, Central Iran // Journal of Mining Institute. 2019. Vol. 236 . p. 142-152. DOI: 10.31897/PMI.2019.2.142
Mining
  • Date submitted
    2016-09-03
  • Date accepted
    2016-11-24
  • Date published
    2017-02-22

Research of compression strength of fissured rock mass

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The article examines a method of forecasting strength properties and their scale effect in fissured rock mass using computational modelling with final elements method in ABAQUS software. It shows advantages of this approach for solving tasks of determining mechanical properties of fissured rock mass, main stages of creating computational geomechanic model of rock mass and conducting a numerical experiment. The article presents connections between deformation during loading of numerical model, inclination angle of main fracture system from uniaxial and biaxial compression strength value, size of the sample of fissured rock mass and biaxial compression strength value under conditions of apatite-nepheline rock deposit at Plateau Rasvumchorr OAO «Apatit» in Kirovsky region of Murmanskaya oblast. We have conducted computational modelling of rock mass blocks testing in discontinuities based on real experiment using non-linear shear strength criterion of Barton – Bandis and compared results of computational experiments with data from field studies and laboratory tests. The calculation results have a high-quality match to laboratory results when testing fissured rock mass samples.

How to cite: Protosenya A.G., Verbilo P.E. Research of compression strength of fissured rock mass // Journal of Mining Institute. 2017. Vol. 223 . p. 51-57. DOI: 10.18454/PMI.2017.1.51
Qestion of the geoecology
  • Date submitted
    2013-07-03
  • Date accepted
    2013-09-16
  • Date published
    2014-03-17

Tracing the forecast structural elements while interpretation of remote sensing data within Fresnillo city (Central Mexica)

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The remote sensing data are experimental foundation for leading geological prediction, if the access to geophysical field is absent. The methodology of authorship for automatize lineament decoding with different generalization levels is used for analysis. The result represent a combination of linear and circular structures, which are arranged into a quasiperiodical plan. Discordant proportion areas of overlapping structural component of this plan have a prognostic significance.

How to cite: Movchan I.B., Asyanina V.Y. Tracing the forecast structural elements while interpretation of remote sensing data within Fresnillo city (Central Mexica) // Journal of Mining Institute. 2014. Vol. 207 . p. 195-198.
Problems in geodynamic and ecological safety in the exploration of fields of oil and das, their storage and transporta
  • Date submitted
    2009-10-05
  • Date accepted
    2009-12-05
  • Date published
    2010-09-22

Control of rock mass state in mining the sections at mines оf the Vorkutaugol JST: up-to-date practice

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The article briefly outlines the methods and measures used at mines of the Vorkutaugol JSC to control the stress strain state of rock massif. These measures help to increase face load and to ensure mine safety.

How to cite: Yamenko O.V., Plisko I.E. Control of rock mass state in mining the sections at mines оf the Vorkutaugol JST: up-to-date practice // Journal of Mining Institute. 2010. Vol. 188 . p. 218-220.
Geology
  • Date submitted
    2009-08-17
  • Date accepted
    2009-10-18
  • Date published
    2010-02-01

Geotechnical engineering and hydrogeological specifics of estimate high-rise buildings construction and operation conditions (in terms of local zone on the right bank of Neva river)

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In the paper specificity of geotechnical engineering conditions in the local zone of the right river Neva bank are considered. The influence of underground topographies of Pre-Quaternary soils roof formed by paleovalleys on the specificity of engineering geological profile is analyzed. Influence of tectonic faults on physical and mechanical properties of Upper Kotlin clays (Upper Vendian) which it is planned to use as the basis for high-rise constructions is considered. Negative influence of Low Kotlin (Upper Vendian) pressure water-bearing horizon on clay properties in the construction foundation and structural materials is investigated.

How to cite: Zhukova A.M. Geotechnical engineering and hydrogeological specifics of estimate high-rise buildings construction and operation conditions (in terms of local zone on the right bank of Neva river) // Journal of Mining Institute. 2010. Vol. 186 . p. 13-17.
Hydrogeology, engineering geology
  • Date submitted
    2008-10-12
  • Date accepted
    2008-12-17
  • Date published
    2009-12-11

Principles of development of geological engineering and geological criteria for safe burial of low radioactive wastes in lower cambrian blue clays in the Leningrad region

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It is noticed that the chosen territory for nuclear-waste disposal in Lower Cambrian clay massif nearby Koporje of Leningrad region takes place in a tectonic zone. Lower Cambrian clays are considered as the block-fractured rock mass having a depth zone structure. The long radioactive irradiation of dark blue clays has led to transformation of their structure, physical-chemical and physical-mechanical properties, and also to activization of microbial activity. Nine criteria to the geoenvironmental and engineering geological characteristics allowing in a complex to estimate safety and reliability of a nuclear-waste disposal in clay formations on an example of dark blue clays are suggested.

How to cite: Dashko R.E. Principles of development of geological engineering and geological criteria for safe burial of low radioactive wastes in lower cambrian blue clays in the Leningrad region // Journal of Mining Institute. 2009. Vol. 183 . p. 187-195.