Geofizicheskiy Zhurnal-Geophysical Journal最新文献

{"title":"Identification of geological faults by geophysical methods for risk assessment in underground mining","authors":"O.V. Sukhinina","doi":"10.24028/gj.v44i6.273645","DOIUrl":"https://doi.org/10.24028/gj.v44i6.273645","url":null,"abstract":"\u0000High-accuracy prediction of geological faults, especially small-amplitude tectonic faults, is essential for an efficient and safe underground mining. Having such information about the location of tectonic faults in the rock mass reduces the likelihood of rock collapse and outburst, gas explosion, and water breakthrough during the mining operations. Modeling of the tectonic structure of the rock mass based on the data from the exploratory drilling and ground geophysical observations is of crucial importance to the extraction of mineral raw materials. Typically, in the areas of mineral extraction, tectonic faults in the rock mass are well studied using these data, but the predicted faults are represented by simplified imaginary surfaces that separate different structural parts of the rock mass and are not normally found by mining in such a form.\u0000The actual structure of tectonic faults is revealed in the course of mining, but the use of seismic survey is required for further prediction of such faults. The experience of applying these methods is shown in the examples of studies of tectonic faults of coal seams in the Donbass mines during the period from 2008 to 2012.\u0000To illustrate the capabilities of underground and surface 2D seismic surveys to accurately predict the location of faults, a site was chosen at the Dneprovskaya mine, which is characterized by the most amount of data collected from exploration drilling and geophysical methods. Also, in contrast to the mining practice when the coal seams areas are discarded based on the results of research due to difficult geological conditions or are not documented by geologists in the process of panel mining, this specific area is distinguished by the completeness of mapping of real faults exposed by mining operations. Predictions of faults obtained by preliminary and CDP seismic surveys are compared with the real faults exposed by mining operations.\u0000An example of research at the Krasnolimanskaya mine shown in this paper is among a few isolated cases utilizing 3D CDP seismic survey at mines. The results of the prediction of tectonic faults and the specifics of data processing and interpretation are examined.\u0000The research results considered in this paper can be used for further development of seismic survey methods for high-accuracy prediction of geological faults.\u0000","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48026572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"National seismological bulletin of Ukraine for 2021","authors":"Yuliana Andruschenko, O. I. Liaschuk, L. Farfuliak, T. Amashukeli, O.Z. Haniiev, V. Osadchyi, K. Petrenko, S. Verbytskyi","doi":"10.24028/gj.v44i6.273649","DOIUrl":"https://doi.org/10.24028/gj.v44i6.273649","url":null,"abstract":"\u0000The National System of seismic observations of Ukraine has accumulated a network of observation seismicpoints the joint management of the S.I. Subbotin Institute of Geophysics of National Academy of Sciences of Ukraine and the Main Special Monitoring Center of the State Space Agency of Ukraine. The two institutions together established a joint National database in which the observations are collected, processed and analyzed. Alongside live updates, the data are systematized as seismological bulletins an earthquake catalogs.\u0000According to the data, in Ukraine and the nearby countries there happened in 2021 over one hundred fifty earthquakes. Most of them occurred in the deep-focus Vrancea region (Romania). The maximum recorded magnitude was 4.6; the earthquakes in the nearby countries were local in scope and had no significant effect on the seismicity in Ukraine. The largest earthquake in Ukraine (t0=03:18:04; φ=48.87 °N; λ=25.68 °E; h=6 km; mb=4.3) occurred on September 23 in the Ternopil region.\u0000In Ukraine, most epicenters of the recorded earthquakes lie in the Volyn-Podillya area and the Forecarpathian fold at the edge of the Folded Carpathians. In the Crimean-Black Sea region, there was weak seismicity with earthquake epicenters concentrated in the sea.\u0000The Seismological bulletin of Ukraine contains detailed information on all seismic events which happened in Ukraine, Romania, Poland, Moldova, Slovakia, Hungary, and Belarus.\u0000","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42711694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Donbas conductivity anomaly in the Karpinsky Swell","authors":"I. Rokityansky, A. Tereshyn","doi":"10.24028/gj.v44i6.273642","DOIUrl":"https://doi.org/10.24028/gj.v44i6.273642","url":null,"abstract":"Donbas Foldbelt (DF) and Karpinsky Swell (KS) are contiguous parts of a system of elongated sedimentary basins forming lineament from Poland through Pripyat Trough in Belarus, the Dnieper-Donets Basin (DDB) and DF in Ukraine, KS in Russia, across the Caspian Sea, through Mangyshlak in Turanian plate in Asia. In DF, the Mesozoic-Cenozoic sediments were raised, and subsequent erosion exposed the Carboniferous coal-bearing strata. In contrast to DF, the Paleozoic rocks in KS are covered by 1—3 km thick sediments of Mesozoic-Cenozoic age; productive structures of the earlier age cannot be confidently studied in KS by geological methods. So, geophysical methods are the promising approach for the KS deep structure studies.\u0000This work is devoted to electromagnetic (EM) studies of the electrical conductivity of rocks by the methods of magnetic variation profiling (MVP) and magnetotelluric sounding (MTS). Previously [Rokityansky, Tereshyn, 2022], we described the results of the EM research on DF in detail. MVP reveals the intense Donbas electrical Conductivity Anomaly (DCA) running along the main anticline of the folded Donbas. DCA parameters: maximum possible depth of the anomalous currents center h=18±2 km. Frequency response maximum Т0≈3600 s yields the total longitudinal conductance G=(8±2)∙108 S∙m. 70 MTS at periods 0.1—3000 s yield two conductive stripes, with the upper edge varying from 0.3 to 5 km. The stripes are parallel to the DCA axis and are considered as part of DCA. A very large value of G suggests that the anomalous body extends to some considerable depth. The DCA axis spatially coincides with an intense (up to 90 mW/m2) deep heat flow anomaly. Thus, the nature of the DCA lower part can be a partial melting. Theoretical estimates show that intense anomalous fields of geomagnetic variations arise over highly elongated conductors. Therefore, there is reason to expect that the anomaly continues eastward. We found two MTS profiles crossing the Karpinsky swell, and under both profiles strong conductivity anomalies are clearly seen. We re-interpreted original data and presented parameters of all 3 anomalies in an identical style. The main conclusion: the anomaly parameters on the three profiles are approximately the same, and one can assume with a high probability the existence of a single anomaly of electrical conductivity in the Donbas and Karpinsky Swell with a common length of more than 500 km and longitudinal conductance G≈8×108 S×m.","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43416751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional density model of the sedimentary filling of the Carpathian-Pannonian region","authors":"I. Makarenko, M. Bielik, V. Starostenko, Ya. Dererova, O. Savchenko, O. Legostaeva","doi":"10.24028/gj.v44i6.273639","DOIUrl":"https://doi.org/10.24028/gj.v44i6.273639","url":null,"abstract":"The work is devoted to the construction and calculations of a three-dimensional density model of the sedimentary filling of the Carpathian-Pannonian region in order to obtain a more detailed map of the residual gravity field (stripped gravity map). This research was facilitated by and in-depth analysis of a large amount of data highlighting the density properties of Neogene-Quaternary deposits (the Pannonian Basin, the Transylvanian Depression, the Transcarpathian Trough), molasse deposits of the Carpathian Foredeep and flysch deposits of the Outer Carpathians in the Czech Republic, Slovakia, Poland, and Ukraine. Basic data for the construction of a three-dimensional density model of sedimentary deposits were obtained from laboratory studies of rock samples from drill core logging and deep exploratory wells, as well as rock samples taken from numerous outcrops in the research region. The average value of the density for molasse and flysch deposits of the Romanian part of the Carpathians was estimated based on the results of comparing the lithologic-stratigraphic complexes of these deposits in the adjacent areas of the eastern part of the Ukrainian Carpathians with similar ones in the Romanian Eastern Carpathians and the analysis of available data on the density of the Carpathian Foredeep and the Outer Flysch Carpathians for the Ukrainian part. The research method, which is a modification of geological reduction, has been applied in the work. Its essence consists of the sequential calculation and extraction of the three-dimensional gravity effect of sedimentary layers, the parameterization of which is better defined than those layers that lie deeper, from the anomalous gravity field. As a result, a residual gravity field is formed due to deep inhomogeneities associated with the consolidated part of the crust and the upper mantle. Calculations of gravity effects were carried out on a scale of 1:4,000,000 on a 10—10 km grid using the modern GMT-Auto. The detailed map of the residual (cleared of the effects of sedimentary layers) gravity field of the Carpathian-Pannonian region (stripped gravity map) is an effective tool in understanding the sources of the dominant gravity features of the studied region. Thus, the Pannonian Basin manifests itself as a general maximum with a number of local positive anomalies (more than 50 mGal), which are observed over small depressions filled with low-density thick sedimentary deposits: the Danube, Solnok, Makó, Békés Basins, and the Transcarpathian Trough. The phenomenon of positive and not negative values of the residual gravity field for these structures can be explained by the intrusion of the sedimentary cover of volcanic rocks, or the presence of high-density bodies with a special petrophysical composition (metamorphic complexes?) in the consolidated part of the crust. Another reason may be the effect of the regional background, which is due to the rise of Moho boundary in the Pannonian Basin to 24—26 km. The ","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44253484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleotemperature reconstructions based on vitrinite thermometry data (on the example of the Upper Paleozoic deposits of the Dnieper-Donets depression and the adjacent margins of the Donbas)","authors":"A. Ivanova, V. Gavryltsev","doi":"10.24028/gj.v44i5.272334","DOIUrl":"https://doi.org/10.24028/gj.v44i5.272334","url":null,"abstract":"The article is devoted to paleotemperature reconstructions based on the data on the reflectance of the vitrinite of coal organic matter in the Upper Paleozoic deposits of the Don-Dnieper trough (within the Dnieper-Donets depression and adjacent parts of the Donbas). It is builds on earlier work on reconstructing the paleogeothermal regime by establishing paleogeothermal gradients and amplitudes of vertical displacements of rock massifs. Paleogeothermal indicators are associated with the geodynamic setting of the subsoil, which determines the intensity and nature of the distribution of heat sources, geological development, and features of the tectonic structure of the region. Based on the results, a map of the distribution of paleotemperatures at a depth of 3 km was constructed. An analysis of the changes and patterns in the distribution of paleotemperatures makes it possible to reveal the role of volcanism, deep faults geodynamics, and lithospheric parameters in the thermal history of the region, as well as to evaluate its thermal field evolution. The presented map, along with the previously published maps of the paleogeothermal gradients and amplitudes of vertical displacements of rock massifs, can be used to demonstrate the features and patterns of the regional distribution of the indicated parameters. It could become a powerful tool in the study of the tectonic and geothermal history of the region.","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45701555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The manifestations of modern degassing in the heat flow and deep structure (on the example of Lohvytsky block of Dnieper-Donetsk basin)","authors":"O. Usenko, A. Usenko","doi":"10.24028/gj.v44i5.272327","DOIUrl":"https://doi.org/10.24028/gj.v44i5.272327","url":null,"abstract":"The article contains heat flow calculations in the Lokhvytsky block and a scheme of the distribution of heat flow. We found the dependence of heat flow distribution with zones of activated deep faults of the crystal basement, sedimentary cover of Sribnenska depression and its surroundings. At the borders of Lokhvytsky block the heat flow in the area changes only a little, staying close to the average value — 40 mWt/m2. At all deposits the gradient increases by 20—30 °С/m, which happens at the intersection of tectonic, stratigraphic and lithological borders, which in many cases control the location of hydrocarbon deposits as well. \u0000Changes of temperature and composition of waters at the depth where the gradient jumps let us assume that their reason is modern hydrothermal activity. To find its manifestations, we incorporated geophysical research that determined the fault zones and zones of decompression, to which hydrocarbon deposits tend. The connection between thermal water discharge zones and faults is confirmed by their enrichment with hydrogen, helium, and the presence of native metal particles. \u0000Fault zones, which limit the Sribnenska depression and the Kherson—Smolensk transregional tectonic seam are shown at the crust structure, established by a two-dimensional speed model of seismic Р waves in the Еarth’s crust (GEORIFT 2013 profile). The results of seismotomographic research show the complex structure of the mantle, directly under the study area. \u0000Geophysical data demonstrate that faults manifested in the crystalline basement and sedimentary strata control the location of high-velocity blocks in the crust. The continuation of faults to the boundary of the crust and mantle is unquestionable. The inhomogeneities of the structure of the upper mantle and the transition layer, reflected in the seismotomographic model, can be traced directly under the Sribne depression to the lower mantle. This allows us to assume, as a working hypothesis, the existence of a chain of geodynamic processes that are manifested on the surface in hydrothermal activity.","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41496485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Article 2. Structural position of suites and strata of the “Bug series”","authors":"V.P. Kyrylyuk","doi":"10.24028/gj.v44i5.272337","DOIUrl":"https://doi.org/10.24028/gj.v44i5.272337","url":null,"abstract":"The name “Bug Series” was introduced into the Precambrian stratigraphic scheme of the Ukrainian Shield more than half a century ago. During this period, ideas about the composition and age of the series changed several times, but at the same time, until recently, the opinion of various studies about its stratigenic nature remained unchanged. In recent years, a number of publications have appeared in which other views on the origin of the “Bug series” are expressed. Initially, they concerned only individual petrographic groups, such as carbonate and magnetite-bearing rocks, which were attributed to endogenous (magmatic) origin. Later, an opinion was expressed about the nonstratigenic origin of the entire “Bug Series”, and some authors propose to abandon the dismemberment of the Early Precambrian granulite complexes into suites altogether. These ideas are based only on the materials of the study of local objects obtained by drilling and geophysical methods, and they do not take into account the results of regional geological and stratigraphic studies. Simultaneously with new ideas about the genesis of the “Bug series”, an attempt is being made to link its origin with faults and to revise its age.
 In order to discuss the problem of the “Bug series”, a series of publications has been prepared, presenting the main generalizations of many years of regional geological and thematic studies on the composition, structure, stratigraphic and structural position of the units belonging to the “Bug series”. The cycle consists of three separate articles. The first article characterizes the composition of subdivisions and rock associations included in the “Bug series” in the current Precambrian stratigraphic scheme of the Ukrainian Shield. In this second article of the cycle, ideas about the structural position of the “Bug series” and its subdivisions are considered. For a long time there was an opinion that the “Bug series” performed synclines “superimposed” on the ancient foundation. These ideas we-re convincingly refuted more than half a century ago on the example of the stratotype section of the Bug series in the area of Zavallia [Vinogradov, 1970], but sometimes some researchers still adhere to them. The data presented in this article indicate that all units that now belong to the “Bug series” are suites and strata that are part of a single Bug Area granulite complex and occupy a clearly defined stratigraphic and structural position in its section. Ideas about the connection of the “Bug series” with “superimposed” synclines or faults do not have any reliable justification.","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135599410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of the oil reservoir depletion","authors":"M. Lubkov, K. Mosiychuk","doi":"10.24028/gj.v44i5.272333","DOIUrl":"https://doi.org/10.24028/gj.v44i5.272333","url":null,"abstract":"In order to study the dynamics of depletion in heterogeneous oil reservoirs on the base of combined finite-element-difference method for the non-stationary problem of piezoconductivity we have carried out a numerical simulation of the pressure distribution in vicinity of the operating well. At that we have taken into account the heterogeneous distribution of filtration characteristics inside the reservoir and the oil infiltration parameters on the boundaries of the reservoir. The developed method for solving the non-stationary problem of piezoconductivity in deformed oil formations allows us adequately to describe the distribution of pressure near production and injection well systems in real operating conditions. We have shown that depletion processes in vicinity of the active well mainly depend on the intensity of oil production and the degree of oil infiltration at the boundaries of the reservoir’s area and to a lesser extent on the filtration parameters inside the reservoir. Therefore, in order to maintain the proper level of oil production in the reservoir’s area, it is necessary, for example, thanks to the use of modern technologies (system of injection wells), to ensure a sufficient inflow of the oil phase at the borders of the considered area. We have shown that in the cases of low oil infiltration at the boundaries of the reservoir area, the value of depletion is directly proportional to the production power of the well. At the same time, a decreasing of the reservoir permeability leads to a slow downing of depletion processes. The limiting value of the oil boundary infiltration coefficient, which allows achieving industrial oil production, is m. At that, the time of reaching of the stationary productive regime is directly proportional to the value of the oil permeability coefficient inside the reservoir. Before installing a system of production and injection wells in heterogeneous oil reservoirs, it is necessary to carry out a systematic analysis of the degree of depletion of the working reservoir’s areas in order to place them in such a way that would ensure the effective dynamics of filtration processes around these areas.","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":"19 6","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41256424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Forecast of tectonic disturbances zones in coal layers","authors":"V. Baranov, P. S. Pashchenko, S. Štefanko","doi":"10.24028/gj.v44i5.272332","DOIUrl":"https://doi.org/10.24028/gj.v44i5.272332","url":null,"abstract":"This paper considers the problem of identifying geological disturbances that are ubiqu-itous in rocks. The purpose of the work is to test the methodology for identifying tectonic faults and their geometric parameters in coal seams. The article presents the results of the analysis of the accumulated information concerning the study of the microstructure of coal — quasicrystals, which are a consequence of tectonic stresses. Their quantitative characteristics are used to predict dynamic and gas-dynamic phenomena in coal mines, disturbed zones and subzones. Employees of the IGTM NAS of Ukraine carried out studies of the structure of coal in the place of the recorded gas-dynamic phenomenon at one of the mines of Donbass; selected, prepared and studied coal samples using optical microscopy; presented the graphical results of the volumetric allocation of plicative disturbance in the outburst zone of the coal seam and the results of measurements of the strength of the coal; determined the relationship between the strength properties of the coal seam and its microstructural features; established the geometric parameters of the plicative disturbance and made a prediction of the development of the disturbance under these conditions. The results obtained show the effectiveness of the applied methodology, allow increasing the safety of mining operations in coal mines, by predicting the development of geological disturbances invisible to the naked eye and preventing gas-dynamic phenomena. The results obtained are further evidence of the confinement of dynamic, gas-dynamic and thermal phenomena to disturbed zones and the existing relevance of their identification by modern methods.","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42351079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic characteristics and tectonic structure of the Earth's crust of the Carpathian oil and gas region as a component of complex hydrocarbon criteria","authors":"M. Orlyuk, M. Bakarjieva, A. Marchenko","doi":"10.24028/gj.v44i5.272328","DOIUrl":"https://doi.org/10.24028/gj.v44i5.272328","url":null,"abstract":"For the first time, a qualitative and quantitative analysis of the geomagnetic field and oil and gas capacity was performed for the territory of the Carpathian region, which made it possible to reveal the connection of hydrocarbon deposits with the magnetization of the Earth’s crust at the regional and local levels and the features of the deep structure of the Earth’s crust according to seismic data. The regularity of the distribution of oil and gas deposits of the Carpathian oil and gas-bearing region revealed by geomagnetic criteria is confirmed by their connection with regional and local anomalies of the gravity field and heat flow density. According to the analysis of the regional geomagnetic field and magnetic models along the PANCAKE and RomUkrSeis geotraverses, gas fields are located above the magnetic blocks of the middle and lower parts of the Earth’s crust or in their marginal parts, and oil fields are located above practically non-magnetic deep blocks. Under the thrust part of the Carpathian arc, the regional features of the Earth’s crust structures are clearly manifested, namely, starting from the longitude of the city of Rakhiv, the submeridional direction of extension of regional anomalies of magnetic, gravity, and thermal fields and their horizontal gradient zones prevails. The oil and gas potential of the region is in good agreement with this — the gas fields are timed to the minimum values of the regional horizontal gradient of the regional magnetic field, to the increased gradient of Bouguet anomalies, as well as to the minimum values of the horizontal gradient of heat flow density anomalies. In local geophysical fields, gas fields are gravitating: to weakly negative magnetic anomalies and their gradient zones; to negative anomalies of the gravitational field predominantly; to positive anomalies of heat flow density in the northwest, within the area of Trans-European suture zone (without the middle of the Krakovets fault), and negative anomalies in the Carpathian trough. Oil and oil condensate deposits are correlated with a band of positive magnetic field anomalies, negative gravity field anomalies, and increased heat flux density values. The main deep faults of the Carpathian region and the marginal part of the Platform in the first approximation can be considered Velikomostivsko-Chernivetsky, which characterizes the change in the character of magnetic and gravity fields and heat flow density, Rava-Rusky, which reflects the zone of articulation of the Eastern and Western European platforms, Pre-Carpathian — the border of the Pre-Carpathian trough and the Folded Carpathians on the Earth’s surface (as well as the boundary of the Archaean(?)-Paleoproterozoic and Meso-Neoproterozoic crust according to the modern international chronostratigraphic scale), as well as the Transcarpathian fault. On the basis of magnetic and seismic data, the hypothetical depth position of these faults and the possible connection with them of hydrocarbon","PeriodicalId":54141,"journal":{"name":"Geofizicheskiy Zhurnal-Geophysical Journal","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42147454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}