CONTENTS № 06/2023 |
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DOI: 10.53085/0034-026X_2023_06_03 УДК 553.984:552.55:551.763(571.1) Postnikov A.V., (National University of Oil and Gas «Gubkin University») // postnikov.a@gubkin.ru Postnikova O.V., (National University of Oil and Gas «Gubkin University») // olgapostnikova@yandex.ru Kulagina N.K., (National University of Oil and Gas «Gubkin University») // kulagina.n@gubkin.ru Kitaeva I.A., (National University of Oil and Gas «Gubkin University») // kitaeva.i@gubkin.ru Zueva O.A., (National University of Oil and Gas «Gubkin University») // oa_antipova95@mail.ru Kuznetsov A.S., (National University of Oil and Gas «Gubkin University»)// andrey.kuznecov.91@mail.ru Loshkareva V.A. (National University of Oil and Gas «Gubkin University»)// loshkareva.v@gubkin.ru SILICIUS RESERVOIR ROCKS OF LATE CRETACEOUS DEPOSITS OF THE NADYM-PUR-TAZOVSKIY REGION Siliceous reservoir rocks of the Late Cretaceous deposits of the Nadym-Pur-Taz region are represented by a wide complex of silicites, which include quartz, cristobalite, zeolites, illite, montmorillonite, and glauconite. The rocks were formed under the conditions of the marine basin and under the active influence of volcanogenic material. The reservoir rocks void space of the Lower Berezovskaya subformation represents the hierarchical structure which includes voids of various genesis and size: voids confined to the burrows of burrowing organisms; intraform voids; interformal voids; lenticular voids; cellular voids; voids associated with microstylolites. Keywords: siliceous deposits, argillaceous-siliceous deposits, microporosity, silicites, quartz, cristobalite, zeolite, reservoir rocks, Lower Berezovskaya subformation, ichnofacies, cellular voids, intrafirm voids.
Р.3-8 |
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DOI: 10.53085/0034-026X_2023_06_08 УДК 552.5 Postnikova O.V., (National University of Oil and Gas «Gubkin University») // olgapostnikova@yandex.ru Izyurova E.S., (National University of Oil and Gas «Gubkin University») // ekonovalceva@yandex.ru Sivalneva O.V., (National University of Oil and Gas «Gubkin University») // sivalneva.o@gubkin.ru Izyurov A.D., (National University of Oil and Gas «Gubkin University») // alexizyurov@gmail.com Zueva O.A. (National University of Oil and Gas «Gubkin University») // oa_antipova95@mail.ru LITHOLOGICAL AND PETROPHYSICAL HETEROGENEITY OF PRODUCTIVE DEPOSITS OF THE VIKULOVSKAYA FORMATION The lithological and petrophysical studies of the rocks of the Vikulovskaya formation revealed a high degree of heterogeneity in the distribution of reservoir properties, which manifests itself not only within a few meters of the section, but also at the level of micro-layers in rock samples. The analysis of the factors causing abrupt changes in permeability showed that the primary structural and textural characteristics of rocks and diagenetic secondary processes are of the greatest importance. Keywords: West Siberian NGP, Krasnoleninsky vault, Vikulovskaya formation, lithological and petrophysical characteristics.
Р.8-12 |
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DOI: 10.53085/0034-026X_2023_06_12 УДК 553.98(470.41) Plotnikova I.N. (Academy of Sciences of the Republic of Tatarstan, Kazan) // irena-2005@rambler.ru ANALYSIS OF THE RESULTS OF INVESTIGATION OF THE ZONES-COLLECTORS IN THE CRYSTALLIN BASEMENT BY THE DRILL STEM TESTING The article contains an analysis of the results of the study of decompacted, fractured reservoir zones of the Precambrian crystalline basement in the territory of the South Tatar arch (Tatarstan). The systematization of the conditions for testing reservoir intervals by the drill stem testing has been carried out. Optimal differential pressure drawdown have been substantiated. The reasons for the lack of inflow are identified. The assessment of fluid saturation of reservoirs was carried out. The absence of industrial oil inflows from fractured rocks of the crystalline basement in all drilled wells does not indicate the absence of water and oil saturation in reservoir intervals. Keywords: crystalline basement, Precambrian, reservoir, drill stem testing, oil saturation, fluids, drawdown.
Р.12-20 |
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DOI: 10.53085/0034-026X_2023_06_21 УДК 552.22, 552.122 Sabirov I.A. (National University of Oil and Gas «Gubkin University»)// sabirov.i@gubkin.ru Postnikov A.V. (National University of Oil and Gas «Gubkin University») // postnikov.a@gubkin.ru PETROGRAPHIC CHARACTERISTICS OF WEATHERING CRUST ROCKS OF THE SOUTHERN SLOPE OF THE NEPSKO-BOTUOBINSKAYA ANTECLISE The current article continues a series of articles and papers devoted to the study of weathering crust rocks. The authors previously in the articles [4, 5, 7, 8] proved that the formation of weathering crust should be attributed to rocks, and therefore their own classification and the basics of nomenclature are proposed for them. This work is aimed at studying the sections of wells that have exposed the rocks of the weathering crust of the southern slope of the Nepsko-Botuobinskaya anteclise, where the main oil and gas reserves are concentrated in the basal deposits of the Vendian, lying directly on the rocks of the weathering crust. Keywords: weathering crust, basement, hypergenic-metasomatic class, Siberian platform, Nepsko-Botuobinskaya anteclise.
Р. 21-29 |
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DOI: 10.53085/0034-026X_2023_06_29 УДК 552.513 Olenova K.Yu. ( Federal State Budgeted Institution «Russian Research Geological Oil Institute», Aprelevka Branch of VNIGNI, National University of Oil and Gas «Gubkin University») // k.olenova@vnigni.ru Gracheva A.V. (Federal State Budgeted Institution «Russian Research Geological Oil Institute», Aprelevka Branch of VNIGNI) // a.grachova@vnigni.ru Agahanova V.A.1(Federal State Budgeted Institution «Russian Research Geological Oil Institute», Aprelevka Branch of VNIGNI) // v.agahanova@vnigni.ru FACIES ANALYSIS AND RESERVOIR-ROCK CHARACTERIZATION OF THE LOWER CRETACEOUS DEPOSITS: NOVOYAKIMOVSKAYA PARAMETRIC WELL 1 (WESTERN TAIMYR) The Lower Cretaceous Yakovlevskaya and Suhodudinskaya Formations were penetrated by the Novoyakimovskaya parametric well 1 drilled at the junction of the West Siberian Plate and the Siberian Platform. The Lower Cretaceous sedimentary rocks were characterized using the mineralogical, textural, structural, facies, and reservoir properties analyses. Several lithotypes were determined, such as fine to medium grained sandstones, siltstones, claystones, rare layers of siderites, limestones, mixed silty-clay-carbonate rocks and coals. Lithofacies analysis suggests that the Valanginian to the Aptian deposits are regressive in nature formed during a relative sea-level drop and represent a gradual transition from marine to coastal and continental depositional environments of a low-lying coastal plain. Variably grained sandstones with pore-lining and pore-filling clay (mainly kaolinite) cement represent the best reservoir rocks in the succession. Keywords: lithology, facies analysis, reservoir-rock, Yakovlevskaya Formation, Suhodudinskaya Formation, Novoyakimovskaya parametric well 1, Western Taimyr.
Р. 29-37 |
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DOI: 10.53085/0034-026X_2023_06_37 УДК 550.834 (551.263) Almazov D.O. (National University of Oil and Gas «Gubkin University») // d_almaz@mail.ru Savinova L.A. (Center for Operational Services) // snaillll@mail.ru THE IMPACT OF EUSTASY AND SEDIMENTATION CONDITIONS IN THE VOID SPACE OF THE SUBSALT COMPLEX OF THE EASTERN AND SOUTH-EASTERN PARTS OF THE CASPIAN DEEP The article considers the relationship between the spatial distribution of the highest-capacity carbonate reservoir rocks and sedimentation conditions and eustatic fluctuations. The authors present a structural-genetic assessment of the void space in thin sections. The research work gives a forecast of the distribution of sediments with improved reservoir properties based on a wide range of geological and geophysical information. Keywords: carbonate reservoir rocks, reef, sedimentation conditions, eustatic change, secondary porosity.
Р. 37- 45 |
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DOI: 10.53085/0034-026X_2023_06_45 УДК 552.54 Kazimirov E.T., (Gubkin Russian State University of Oil and Gas) // egorcasual@yandex.ru Nuriakhmetov R.R. (Gubkin Russian State University of Oil and Gas) // nuriahmetov25@gmail.com Postnikov A.V. (Gubkin Russian State University of Oil and Gas) // postnikov.a@gubkin.ru TEXTURAL AND STRUCTURAL FORMS OF THE ORGANIZATION OF THE VOID SPACE IN THE FAMEN CARBONATE NATURAL RESERVOIRS OF THE TIMAN-PECHORA OIL AND GAS PROVINCE In connection with the increasing count of hard-to-recover reserves associated with complex carbonate reservoirs, it is necessary to improve existing methodologies of reservoir propertiesfor the accuracy of geological and filtration models. The paper identifies and characterizes the organization forms of the void space in the Zadonsk and Yelets carbonate reservoirs on the Laisky swell, the Kolvinsky megaswell and the Sadayaginsky step of the Timan-Pechora province based on the results of a comprehensive lithological and petrophysical analysis. The main varieties of organogenic forms that form reservoir rocks, their relationship with facies and elements of cyclites have been researched and described. Keywords: Natural reservoir, microbialite, carbonate rocks, Famenian, Timan-Pechora province..
Р. 45-51 |
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DOI: 10.53085/0034-026X_2023_06_51 УДК 552.54 Loshkareva V.A. (National University of Oil and Gas «Gubkin University») // loshkareva.v@gubkin.ru Postnikova O.V. (National University of Oil and Gas «Gubkin University») // postnikova.o@gubkin.ru Kitaeva I.A. (National University of Oil and Gas «Gubkin University») // kitaeva.i@gubkin.ru RESERVOIR ROCKS OF THE ERBOGACHEN HORIZON OF THE CREST OF THE NEPSKO-BOTUOBINSKAYA ANTECLISE The article presents the results of studying the deposits of the Erbogachen horizon, which are based on lithological and petrophysical studies, image analysis methods, X-ray diffraction analysis and SEM methods. Rock types have been identified. Their mineral composition, structure, types and morphology of voids, their spatial distribution have been studied. The cyanobacterial paleocenoses underlying the rocks of the Erbogachen horizon have been identified and described. The types of secondary transformations and their influence on the reservoir properties have been detected. Keywords: Eastern Siberia, Nepsko-Botuoba anteclise, vendian, cyano-bacterial paleocenoses, stromatolites, reservoir rock.
Р. 51-56 |
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DOI: 10.53085/0034-026X_2023_06_56 УДК 550.8.023 Nemchenko N.V. (Russian Research Geological Oil Institute, Aprelevka Branch of VNIGNI, Lomonosov Moscow State University) // n.nemchenko@vnigni.ru Dektereva A.V. (Russian Research Geological Oil Institute, Aprelevka Branch of VNIGNI) // a.dektereva@vnigni.ru Muftakhov V.A. (Russian Research Geological Oil Institute, Aprelevka Branch of VNIGNI) // v.muftahov@vnigni.ru Antipina I.V. (Coretest service Ltd. Russia, Tyumen) // irinaparfenova1999@gmail.com TO THE QUESTION OF CONVERGENCE RESULTS OF THE GRANULOMETRIC COMPOSITION OF CEMENTED TERRIGENIC ROCKS OBTAINED BY DIFFERENT METHODS The article discusses the issues of convergence of the results of the granulometric composition obtained by laser diffraction, the classical combined method (sieve + Kaczynski’s pipette), determining the granulometric composition of the polished rock specimen with the linear method and counting grains of the disintegrated sample by binocular microscope. The conducted studies to carry evaluate possible to evaluate the proposed scheme of sample preparation of cemented terrigenous rocks. The data obtained indicate a correlation between different methods, and the existing differences are influenced by the disadvantages of the methods used. Keywords: granulometric analysis, method of laser diffraction, terrigenous rocks, pipette method, sieve analysis, optical methods of granulometric analysis.
Р. 56-63 |
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DOI: 10.53085/0034-026X_2023_06_63 УДК 621.385.833.286:553.9 Abramov A.N. (National University of Oil and Gas «Gubkin University») // abramov.aln@yandex.ru SCANNING ELECTRON MICROSCOPE USING TO STUDY THE STRUCTURE OF COMPLEX RESERVOIR ROCKS POROUS SPACE The paper presents the results of the complex terrigenous and carbonate reservoirs pore space studying using various methods of scanning electron microscopy, which allow to identify the morphometric characteristics of porous and the nature of their mineralization. Keywords: electron microscopy, microporosity, hard-to-recover reserves, reservoir rocks, hydrocarbon films.
Р. 63-66 |
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DOI: 10.53085/0034-026X_2023_06_66 УДК 552.5, 552.086, 551.3 Vaganova A.A. (Aprelevka Branch of VNIGNI, Lomonosov Moscow State University) // A.Vaganova@vnigni.ru Dyukova A.D. (Aprelevka Branch of VNIGNI) // A.Diukova@vnigni.ru APPLICATION OF IMAGE-ANALYSIS TO CHARACTERIZE THE VOIDS OF THE MIDDLE JURASSIC TUMEN FORMATION IN THE PARAMETRIC WELL ZAOZERNAYA, 1 (KHMAO-UGRA) A detailed analysis of core material from the Zaozernaya 1 parametric well was carried out, including petrographic, granulometric studies of 22 thin sections, image analysis of resin-impregnated thin sections. As a result, a pattern of influence of rock grain size distribution and material composition, as well as intensity of post-sedimentation transformations on the structure and typification of the void space was revealed. Keywords: petrography, granulometric analysis, lithotype, image-analysis, void space structure, tyumen formation, Zaozernaya 1 well, Western Siberia.
Р. 66-77 |