The ideas about the conditions for the formation of large oil and gas reserves in both traditional reservoirs and unconventional shale, as well as in low-pore reservoirs with hard-to-recover superviscous oils and natural bitumen, have been expanded. The influence of geological and geochemical environments on the scale of hydrocarbon accumulations is analyzed.

Keywords: oil; gas; mega-reservoirs; hydrocarbon accumulations; reserves ; area and volume; shale formations; conventional and unconventional reservoirs.

References

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Based on the generalization of world experience in the underground storage of hydrogen with methane and the experimental work performed, the authors predict the development of hydrochemical, microbiological, geomechanical processes and phenomena that, in a real geological environment, will most likely accompany the joint storage of hydrogen and methane in underground formations. The issues of gas diffusion through the tire and hydrogen losses due to its consumption by microorganisms are also considered. Theoretical solutions are illustrated by calculations on synthetic models.

Keywords: underground gas storage; hydrogen; methane; anaerobic microorganisms.

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The article discusses the features of hydrogen accumulation in various geological, geochemical and tectonic conditions, the nature of hydrogen as a gas component of the Earth, the ratio of hydrogen in gas mixtures with other gases, the importance of hydrogen generation sources, its consumption for geological processes of various specifics. Separate criteria for assessing territories on the prospects of detecting hydrogen accumulations are proposed. The author's personal point of view is expressed regarding the directions of the search for natural hydrogen, taking into account the peculiarities of its further use as a chemical and energy resource.

Keywords: natural hydrogen; serpentinization; radiolysis of water; methanogenesis; acetogenesis; sulfate reduction.

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The paper considers some aspects of the theoretical prerequisites for the influence of geodynamic processes on the distribution of hydrocarbon accumulations in natural megareservoirs. The most interesting part to study is the part of Central Siberia, where quite a lot of large and unique oil and gas fields have been discovered in a relatively small area. It is shown that hydrocarbon deposits in the study area are organized into groups according to the size of reserves. This can be explained by geodynamic processes occurring during the geological history of the region. The features of the river network pattern are interpreted as local geodynamic settings of the «pushed block» type. The relationship between the parameters of local geodynamic settings and the scale of oil and gas accumulation is noted.

Keywords: geodynamic processes; large and unique reserves; natural mega-reservoirs; geodynamic conditions; scale of oil and gas accumulation.

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6. Ulmasvay, F. S., Sidorchuk, E. A., Dobrynina, S. A. (2020). Natural classes of large resources of HC joining areas of Western Siberia and Siberian platform. Exposition Oil Gas, 1, 9-13.
7. Isaev, A. V., Polyakov, A. A. (2019). Payakh oil bearing area (Taimyr peninsula) - hard-to-recover oil. Petroleum Geology. Theoretical and Applied Studies, 14(4).
8. (2004). Sedimentary basins: methodology of study, structure and evolution: monograph /Eds. Leonov, Y.G., Volozh, Y.A. Moscow: Nauchniy Mir.
9. Ulmasvay, F. S., Sidorchuk, E. A., Dobrynina, S. A. (2018). Geodynamic stresses as a manifestation of tectonic mechanisms of oil and gas accumulation at great depths. Actual Problems of Oil and Gas, 3(22), 1-8.
10. Sidorchuk, E. A., Dobrynina, S. A. (2022). Geodynamic criteria for forecasting of oil and gas accumulations in complex constructed reservoirs. Neftegasovaâ Geologiâ. Teoriâ i Practika, 17(2), 1-16.

The article considers the existing, actual raw material base of hydrocarbon raw materials of the Republic of Uzbekistan. Brief information is given on the number of discovered oil and gas fields, their distribution in the oil and gas regions of the republic, according to the degree of development, the type of fluids and the size of the reserves. Share participation of initial total resources in the context of oil and gas bearing regions is shown. Information is presented on the results of exploration work of two time periods - before 1991 and from 1991 to the present, where the growth rates of reserves of industrial categories for the first and second stages and the distribution of cumulative oil and gas production are considered. From the above data, it can be seen that the main increase in hydrocarbon reserves in the Republic of Uzbekistan was due to the discovery of unique and large fields in terms of hydrocarbon reserves. Based on the results of the analysis of the actual material, a con-clusion was made, indicating the high potential of the subsoil of the Republic of
Uzbekistan and the feasibility of conducting exploration work in the long term, given the presence of significant forecast hydrocarbon resources.

Keywords: field; oil; gas; hydrocarbons; reserves; oil and gas potential; initial total resources.

References

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The object of the study of this article is the high-carbon domanic deposits of the Astrakhan carbonate massif (Caspian oil and gas province), which are assigned the role of a zonal tire isolating the reservoir of the Lower Devonian-Fransk complex. The authors study the properties of these rocks that affect the insulating ability of the deposits under consideration: multilayer structure, the effect of complex stratification, the appearance of epigenetic clay material. The results of the analysis indicate that uneven concentrations of organic matter in the domanic tire predetermine the mosaic in the manifestation of the strength properties of these rocks. The peculiarity of the domanic strata is emphasized – its enrichment with solid organic matter, which is one of the rock-forming components. The opinion on the important oil and gas-mother functions of domanic deposits is supported. The ideas of the geological role of domanic rocks as (1) the oil and gas mother strata, (2) a reservoir for autochthonous hydrocarbons, (3) a regional tire for underlying sediments
are expanding, which emphasizes the importance of the formation of hydrocarbon accumulations within the considered strata by the in situ mechanism. Suggestions are made on the directions of further research detailing the possibilities of domanic deposits in oil and gas formation and oil and gas accumulation.

Keywords: domanic rocks; tire; reservoir; organic matter; hydrocarbons; Caspian oil and gas basin.

References

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Geochemical and petrographic characteristics of the Miocene rocks of the Shamakhi-Gobustan trough (South Caspian basin) and the North Absheron uplift zone (Middle Caspian basin) indicate that these sediments contain products of erosion of the magmatic rocks of the Eurasian continent’s active margin - the volcanic arc of the Lesser Caucasus, as well as granitic basement of the Garabogaz High and Mesozoic-Eocene sedimentary strata of the Middle Caspian basin and the Greater Caucasus. The uplift of the Greater Caucasus, which began in the Middle Eocene as a result of the collision of the Afro-Arabian and Eurasian plates, brought to the exposure of the Mesozoic-Eocene sedimentary rocks of the Tethys Ocean that were deposited from the detrital material of the disintegrated igneous rocks of the Lesser Caucasus and the granitic basement of the Russian platform. The clastic material of these eroded Cretaceous-Eocene sedimentary rocks was accumulated in the Miocene basin that caused the geochemical characteristics of the Miocene sediments demonstrating the occurrence of igneous rocks of active margins or products of their erosion in the sources area. The accumulation of thick quartz-containing sand beds in the Chokrakian time (analogous to the Langhian stage) in a number of fields of the Shamakhi-Gobustan trough was the result of the exposure removal to the surface of quartz-rich Cretaceous rocks of the Greater Caucasus because of collisional processes, and their intensive erosion due to humidization of the climate during the Middle Miocene climatic optimum. Judging by the geochemical characteristics, during deposition of shale mudrocks the arid conditions prevailed.

Keywords: Miocene; South Caspian and Middle Caspian basins; geochemistry; provenance; climate; geodynamic setting.

References

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In this paper were presented the results of the lithological-sedimentological description of the core material of the Middle-Upper Jurassic deposits with additional study of the vital activity traces of organisms in Akkuduk field to determine the environmental condition and identification of facies. The Akkuduk field is characterized by a rather complicated environmental conditions and understanding of sedimentation processes. In the course of the work, 9 main ichnogenus were identified in the core samples that make up the section of the field, which contain numerous traces of the vital activity of organisms that do not differ in diversity. Associations were determined to identify facies in the section and their dependence on trace fossils. The generalization of the obtained materials enabled to build columns with the definition of facies and envionmental conditions, which subsequently can be used for conducting facies modeling in the geological model of the field.

Keywords: lithology; sedimentology; ichnofossils; traces fossils; ichnofacies; facies.

References

1. Votsalevsky, E. S., Daukeev, S. Zh., Kolomiets, V. P., et al. (2002). Deep structure and mineral resources of Kazakhstan. «Oil and Gas» National Academy of Sciences of the Republic of Kazakhstan, 3, 248.
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4. Jan, P. A., Vakulenko, L. G. (2011). Change in the composition of ichnofossils in the Callovian-Oxfordian deposits of the West Siberian basin as a reflection of the cyclicity of sedimentogenesis. Geology and Geophysics, 52(10), 1517-1537.
5. Miftahutdinova, D. N., Kutygin, R. V. (2021). Ichnofossils of Permian-Triassic deposits of Southern Verkhoyansk (section Tiryakh-Kobyume, Republic of Sakha (Yakutia)). Uchenye Zapiski Kazanskogo Universiteta. Natural Sciences Series, 163(3), 351–370.
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8. Seilacher, A. (2007). Trace fossil analysis. Berlin: Springer-Verlag.
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10. Knaust, D., Bromley, R. (2012) Trace fossils as indicators of sedimentary environments. Developments in sedimentology. Vol.64. Amsterdam: Elsevier.
11. Pembrerton, S. G., Frey, R. W., Ranger, M. J., MacEachern, J. A. (1992). The conceptual framework of ichnology. In: Application of Ichnology to Petroleum Exploration a Core Workshop, SEPM Core Workshop №17, Calgary.
12. Pembrerton, S. G., Van Wagoner, J. C., Wach, G. D. (1992). Ichnofacies of a wave-dominated shoreline. In: Application of Ichnology to Petroleum Exploration a Core Workshop, SEPM Core Workshop №17, Calgary.
13. Seitkhaziev, E. Sh. (2020). Integrated geochemical study of sludge and core samples from post-salt deposits of the southern part of the Caspian depression and the «Oil-oil source rock» correlation. SOCAR Proceedings, 2, 30-49.
14. Pronin, N. A. (2023). Determination of the conditions of sedimentation of the Jurassic deposits of the Karaton field based on a comparison of electrofacies and sedimentological description of the core. SOCAR Proceedings, SI1, 13-17.
15. Aliyeva, E. H., Mustafayev, K. F. (2023). Geochemistry of Miocene sediments of the Middle and South Caspian basins (within Azerbaijan): climate, chemical maturity and provenance. SOCAR Proceedings, SI2, 49-65.

The study of the geological structure, the history of the development of the Medynskoye-Sea field by reference seismic horizons corresponding to the boundaries of the Paleozoic stratigraphic complex; identification of the features of the structure and distribution of petroleum horizons identified by drilling and logging of exploration wells.

Keywords: Pechora Sea; Medynskoye-sea; paleozoic; reservoir; oil capacity; shelf; hydrocarbon reserves; productive horizon.

References

1. Bogoyavlensky, V. I., Bogoyavlensky, I. V. (2014). Strategy, technologies and technical means of search, exploration and development of offshore deposits in the Arctic. Vestnik MGTU, 17(3), 437-451.
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3. Lobusev, M. A., Lobusev, A. V., Bochkarev, A. V., et al. (2018). Realization of the generation potential of the Upper Jurassic parent deposits of the Arctic sector of the Western Siberian NGP. Environmental Protection in the Oil and Gas Complex, 6, 49-57.
4. Lobusev, M. A., Bochkarev, A. V. (2017). Regional and local forecast of oil and gas potential of shale formations of the Arctic sector of Western and Eastern Siberia. In: 19th scientific and practical conference on geological exploration and development of oil and gas fields gas «Geomodel-2017». Gelendzhik: EAGE.
5. Fedorovsky, Yu. F., Zakharov, E. V., Khoshtaria V. N., et al. (2008). Geological exploration in the eastern instrument part of the Barents Sea can ensure the creation of a new oil-producing area on the Russian shelf. Geology, Geophysics and Development of Oil and Gas Fields, 12, 4-9.
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7. Dzyublo, A. D. (2009). Geological and geophysical studies and models of natural reservoirs of the Barents-Kara region in order to increase the resource base of hydrocarbons. PhD Thesis. Moscow: Gubkin University.
8. Fedorovsky, Yu. F., Zakharov, E. V., Oxenoyd, B. E. (2005). Oil of the Barents Sea – a new stage of development. Geology, Geophysics and Development of Oil and Gas Fields, 12, 4-8.
9. Dzyublo, A. D., Maslov, V. V., Sidorov, V. V., Shnip, O. A. (2021). Forecast and assessment of hydrocarbon potential of Cretaceous and Jurassic deposits of the Kara Sea shelf based on the results of geological exploration. SOCAR Proceedings, SI2, 141-148.
10. Dzyublo, A. D. (2008). Reservoir potential of riphogenic Paleozoic deposits of the Southeastern part of the Pechora Sea. Gas Industry, 6(618), 62-65.
11. Polyakova, I. D., Bogoyavlensky, V. I., Budagova, T. A., Danilina, A. N. (2012). Forecast of oil and gas potential of Paleozoic−Mesozoic deposits of the Barents Sea region of Russia. Drilling and Oil, 4, 20-25.
12. Dzyublo, A. D., Maslov, V. V., Sidorov, V. V., Sonn, M. S. (2022). Geological model and prospects of oil and gas bearing deposits of the Silurian complex of the Pechora Sea shelf. SOCAR Proceedings, SI2, 95-102.
13. Grunis, E. B., Marakova, I. A. (2019). Prospects for the discovery of new deposits in the Timan-Pechora province and the Arctic shelf. Geology of Oil and Gas, 5, 5-13.

The article analyzes the selection and recommendations, as well as instructions for drilling deep directional and horizontal wells, electric drilling methods in the Western part of the oil and gas fields of Turkmenistan in order to increase oil and gas production from productive layers of the horizons of the red-colored strata. To analyze the choice of drilling deep directional and horizontal wells, materials of previously operated wells, geological and operational characteristics of deposits and the guidance document «Operating Instructions for oil and gas wells», as well as safety rules in the oil and gas industry were used. This paper provides a detailed analysis of the complexity of drilling deep directional and horizontal oil and gas wells and their specific causes, as well as recommendations for the selection of design profiles and operating instructions for different types of deflectors, as well as telemetry systems. Such work will be useful and can be used to fulfill the tasks set when drilling wells, as well as to increase the production of oil and gas wells and to develop fields with complex geological characteristics.

Keywords: profile; deflections; borehole curvature; trajectory; rotor; layout; telesystem; conductor; inclinometer; deflector; azimuth.

References

1. Deryaev, A. R., Gulatarov, H., Esedulaev, R., Amanov, M. (2020). Tekhnologiya bureniya naklonno-napravlennyh i gorizontal'nyh skvazhin i raschety proektirovaniya. Monografiya. Ashgabat: Ylym.
2. Zaitcev, R. A., Raspopov, A. V. (2020). A practice of development of Perm Krai fields with horizontal wells. Perm Journal of Petroleum and Mining Engineering, 20(2), 182-191.
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4. Gulatarov, H., Deryaev, A. R., Esedullaev, R. (2019). Osobennosti bureniya gorizontal'nyh skvazhin sposobom elektrobureniya. Monografiya. Ashgabat: Ylym.
5. Lykhin, P. A., Usov, E. V., Chukhno, V. I., et al. (2019). Simulation of gas-fluid flows motion
   in a directional well. Automation, Telemechanization and Communication in Oil Industry, 10(555), 22-27.
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7. Khuzina, L. B., Shaykhutdinov, A. F., Kazimov, E. A. (2023). To the question of the study of a vibration device to eliminate seizures during the construction of oil and gas wells. Scientific Petroleum, 1, 32-42.
8. Shandrygin, A. N., Kazantsev, M. A., Morev, V., Badalov, E. Z. (2021). Methodology for determining horizontal wells deliverability based on hydrodynamic studies of exploratory wells during hydrodynamic simulation of gas condensate fields. Science and Technology in the Gas Industry, 2(86), 52-59.
9. Bakirov, D. L., Babushkin, E. V., Burdyga, V. A., et al. (2020). Assessment of application prospects of multilateral wells construction technology without use of mechanical joints. Oilfield Engineering, 10(622), 38-42.
10. Deryaev, A. R. (2022). Well design development for multilayer horizons for the simultaneous separate operation by one well. SOCAR Proceedings, 1, 94-101.
11. Grechin, E. G., Bastrikov, S. N. (2020). Theory and practice of horizontal well drilling in productive formations of West Siberian fields. Monograph. Tyumen: Tyumen Industrial University.
12. Griguletsky, V. G., Kuznetsov, A. B. (2021). Influence of bit size on stability bottom drill column balance when drilling a horizontal well. Oil and Gas Studies, 3, 37-51.
13. Mirzoev, F. D. (2014). Methodological principles of choice of rational schemes of arrangement oil and gas deposits of the Arctic shelf with a short milesdavis period. SOCAR Proceedings, 2, 66-72.
14. Neskoromnykh, V. V., Liu, B., Petenev, P. G. (2020). Resistance analysis and development of technical tools for drilling in a horizontal wellbore. Construction of Oil and Gas Wells on Land and Sea, 3(327), 10-14.
15. Reznikov, A., Samotolkov, I. V., Habibullin, L. R. (2020). Prostranstvennoe profilirovanie stvolov skvazhin. Nauchnyj Lider, 1, 16-20.
16. Bi, G., Li, G., Shen, Zh., et al. (2014). Design and rock breaking characteristic analysis of multi-jet bit on radial horizontal drilling. SOCAR Proceedings, 3, 22-29.
17. Buyanova, M. G., Babushkin, E. V., Konesev, G. V., et al. (2020). Use of inhibiting drilling mud when constructing horizontal wells of three casing string design. Oilfield Engineering, 10(622), 12-16.
18. Sarsenbekov, N. D., Yakupova, E. N., Kairbekov, S. B., Seyithaziyev, Ye. Sh. (2018). The role of petroleum geochemistry in enhancing multizone oil and gas reservoirs development. SOCAR Proceedings, 3, 65-74.
19. Ishbaev, G. G., Baluta, A. G., Vagapov, S. Yu., et al. (2019). Supply corrector-damper and bit protector produced by «BURINTEKH», LTD. Burenie i Neft, 12, 49-52.
20. Abbasova, S. V. (2021). Successful application and limitations of horizontal wells. Eurasian Union Scientists,12(81, 4-8.
21. Deryaev, R. (2023). Advantages and effectiveness of the method of simultaneous separate operation of wells in the development of multi - layer deposits. Theoretical & Applied Science, 1(117), 489-492.
22. Mullayev, B. T., Tastemirov, A. R., Turkpenbayeva, Z. Zh. (2016). Optimization of offshore hydrocarbon field development and construction project. SOCAR Proceedings, 4, 11-27.

The article provides information on changes in reservoir pressure gradients in the stratigraphic section of strata with increasing depth in the oil and gas fields of the Baltic and Gogerendag-Ekerem zones. The conditions for the formation of abnormally high reservoir pressures occurring are given, as well as the classification of reservoir pressures by the anomaly coefficient. Reservoir pressure of horizons is predicted based on the results of drilling deep wells. This work is useful and can be used to fulfill the tasks set when drilling new deep wells with abnormally high reservoir pressures for their uncomplicated successful completion of construction.

Keywords: miocene; drilling speed; drilling mud; hydrodynamics; well.

References

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6. Suleimanov, B. A., Veliyev, E. F., Aliyev, A. A. (2023). Oil and gas well cementing for engineers. John Wiley & Sons.
7. Khuzina, L. B., Shaykhutdinov, A. F., Kazimov, E. A. (2023). To the question of the study of a vibration device to eliminate seizures during the construction of oil and gas wells. Scientific Petroleum, 1, 32-42.
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The article defines the prospects for drilling wells in difficult and extreme mining and geological conditions of the Western part of Turkmenistan. The assessment of the current state of prospecting and exploration works in Western Turkmenistan is given. The main problems that drillers will face when drilling complex deep horizons of the red-colored stratum are considered, and general principles and recommendations for overcoming these problems are provided. The applied technical and technological innovations that meet international standards have ensured the successful completion of a number of deep and ultra-deep wells in the fields of the West Turkmen Depression, but have not completely solved the existing drilling problems. The article also provides a number of recommendations for solving these problems. This work contributes to the beginning of the development of a new geological and technological discipline - reservoir pressure management during drilling, and its introduction into practice, which will serve as technical re–equipment and organizational restructuring of deep drilling on a scientific basis.

Keywords: hydraulic fracturing; collector; sedimentation; gas generation; tectonics; clay solution; reservoir pressure; section; permeability.

References

1. Deryaev, A. R. (2021). The technology of drilling wells with separate operation of several horizons simultaneously at the Severny Goturdepe field. Aktual'nye Issledovaniya, 51(78), 23–29.
2. Kazimov, Sh. P. (2022). Enhanced oil recovery in water-flooded and hard  to recover reservoirs. SOCAR Proceedings, 1, 89-93.
3. Deryaev, A. R, Deryaev, S. A. (2022, March). Preparation of drilling fluids and methods for regulation of their properties under difficult thermogeochemical conditions of horizontal drilling of wells (by the example of Turkmenistan). In: International Scientific Review of the Problems And Prospects of Modern Science and Education. Boston:  Problems of Science.
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7. Deryaev, A. R. (2022). Well design development for multilayer horizons for the simultaneous separate operation by one well. SOCAR Proceedings, 1, 94-101.
8. Kurnia, J. C., Shatri, M. S., Putra, Z. A., et al. (2022). Geothermal energy extraction using abandoned oil and gas wells: Techno-economic and policy review. International Journal of Energy Research, 46(1), 28-60.
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22. Khuzina, L. B., Shaykhutdinov, A. F., Kazimov, E. A. (2023). To the question of the study of a vibration device to eliminate seizures during the construction of oil and gas wells. Scientific Petroleum, 1, 32-42.
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The article focuses on the experience of drilling directional wells and cluster drilling in the oil and gas fields of Western Turkmenistan. The paper defines the direction of development of technology for drilling directional wells, taking into account the development of technology at the present time. Proposals are given and equipment, as well as materials possible for cluster drilling of directional wells in the Southwestern part of Turkmenistan are identified. Applied technical and technological innovations that meet international standards have ensured the successful completion of cluster drilling of a number of directional wells in the fields of Southwestern Turkmenistan. This work will mark the beginning of the development of cluster drilling of deep directional wells with abnormally high reservoir pressures and will create an impetus for technical re-equipment, as well as organizational restructuring of cluster drilling on a scientific basis.

Keywords: horizontal termination; boreholes; landscape; casing; cement; formation; mining; сluster drilling; trajectory; curvature mechanism.

References

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5. Khuzina, L. B., Shaykhutdinov, A. F., Kazimov, E. A. (2023). To the question of the study of a vibration device to eliminate seizures during the construction of oil and gas wells. Scientific Petroleum, 1, 32-42.
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8. Nugmanov, B. H. (2017). 3D structural-tectonic modeling of geological structure of the deposit of «Kalamkas» field. SOCAR Proceedings, 1, 17-23.
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25. Deshmukh, V., Dewangan, S. K. (2022). Review on various borehole cleaning parameters related to oil and gas well drilling. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 44(5), 185.
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27. Huseynova, N. I. (2017). Estimation of the differential pressure under the formation stimulation, considering wells interference effect on deformation and filtration processes in the selected field section. SOCAR Proceedings, 1, 70-82.
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This scientific work summarizes the experience of drilling horizontal wells at abnormally high reservoir pressures in the Western part of Turkmenistan. The article describes in detail the choice of the layout of the bottom-hole assembly (BHA), drilling methods, the area of the angle set and the stabilization interval of the zenith angle, and also notes the importance of the quality of drilling mud when drilling horizontal wells. The work performed proves that drilling of horizontal wells is possible both at an early and late stage of field development and their drilling should be provided for when creating technological development schemes at the level of the field development project. Such work will find application for drilling deep horizontal wells with abnormally high reservoir pressures and will lead to an increase in hydrocarbon production, as well as organizational restructuring of horizontal drilling on a scientific basis.

Keywords: oil recovery; geological structure; deviation; zenith angle; borehole; communication channel.

References

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The model of interpretation of rotational viscometry data is described using a strict solution of the Couette flow equation and considering the information resulting from the experiments. Using the example of common rheological models of drilling muds, the influence of the radii ratio and rheological properties on the accuracy of their estimation was studied using the dependence of the Newtonian fluid shear rate gradient. Comparative results of the rheological properties assessment for drilling muds in industrial conditions are given.

Keywords: bi-viscous fluid; Couette flow; maximum likelihood principle; rheologically stationary models.

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Among the many technologies for increasing the efficiency of oil field development using waterflooding, the least economically expensive include hydrodynamic methods for increasing oil recovery, based on changing the directions of filtration flows. Thus, one of the key tasks of increasing the efficiency of waterflooding at a late stage of development is to reduce the volume of ineffective injection. The article discusses the problem of redistributing volumes of injected water between injection wells for a given total injection volume in order to increase oil production. An analytical relationship is proposed for assessing injection efficiency, based on known displacement characteristics and calculated well interference coefficients based on CRMP. The optimization problem is formulated as a linear programming problem. Using the example of a fragment of an oil deposit, the possibility of assessing the injectivity of injection wells is shown, which makes it possible to increase the predicted oil production by changing the direction of filtration flows in the formation. As a result of applying the developed algorithm, the predicted increase in cumulative oil production amounted to 19683 m³ (9.5%) over 15 years.

Keywords: waterflooding optimization; capacitive-resistive model; CRM; linear programming; injection efficiency; interwell connectivity.

References

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Excessive water production in oil and gas wells poses a significant challenge for reservoir management, necessitating effective water shut-off solutions. This study focuses on the development and evaluation of a colloidal silica-based fluid system tailored for high temperature water shut-off applications in challenging reservoir conditions. The system comprises colloidal silica and an activating salt, characterized by its low viscosity, enabling deep penetration and effective treatment. The evaluation methodology employed in this study encompasses visual assessment of gelation time and precise viscosity measurements. Key findings include the influence of temperature, salt concentration, silica content, and activating salt concentration on gelation kinetics. Higher temperatures, increased salt concentration, and elevated silica content were found to significantly expedite gelation, impacting the system’s efficiency. Moreover, different activator ions exhibited varying effects on gelation, primarily attributed to their charge density and size, adding nuance to the gelation dynamics. The study also revealed the system’s sensitivity to even minor variations in salt concentration, particularly when exposed to elevated temperatures. Based on these findings, a practical application strategy is proposed. When deploying silica gels in formations characterized by high salinity formation water and elevated temperatures, the introduction of a low-salinity water preflush is advised. This strategic approach mitigates premature gelation, ensuring the effectiveness of water shut-off operations.

Keywords: water shut-off; silica gel; gelation time; sandpack; high temperature.

References

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This study investigated the mitigation of formation damage caused by silica-based gels. The historical development of water shut-off treatments in the oil and gas industry was also discussed in the paper. The authors highlighted the importance of silicate methods in reservoir conformance control and enhanced oil recovery. They also discussed the recent resurgence of interest in silicates due to their eco-friendly properties and potential for high-temperature applications. Weight loss experiments and sandpack flooding experiments were conducted to assess the removal efficiency of blocking under reservoir conditions. The results showed that a 1% NaOH-containing aqueous solution can completely dissolve the bulk gel within a relatively short timeframe. İt is noteworthy that 10-12 hours is typically sufficient to eliminate the gel responsible for formation damage in the bulk phase. In sandpack flooding experiments, it was found that NaOH injection can effectively remove gel blockages, but it may require multiple injections to achieve complete removal. Overall, this study provides a comprehensive overview of the mitigation of formation damage caused by silica-based gels. The results of this study can be used to improve the design and implementation of gel-based water shut-off treatments in the oil and gas industry.

Keywords: silica gel; water shut-off; formation damage; sandpack; gel block.

References

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The article provides information about the change in the gradient of abnormally high reservoir pressure (AHRP) with increasing depth in the oil and gas fields of Turkmenistan. The analysis of the origin of AHRP is given, which subsequently leads to severe complications due to the manifestations of reservoir fluids, and the hydrodynamic causes of complications are considered in depth. Hypotheses and endogenous opinions are analyzed, as well as the interaction of a complex of reasons for the origin of abnormally high reservoir pressures associated with geological, geochemical and mechanical processes. This work can be used to fulfill the tasks set when drilling ultra-deep wells with abnormally high reservoir pressures, as well as to predict the causes of complications and possible prevention of these complications by regulating the density of drilling mud.

Keywords: oil and gas occurrence; pressure; gradient; washing liquid; migration; degassing.

References

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13. Khuzina, L. B., Shaykhutdinov, A. F., Kazimov, E. A. (2023). To the question of the study of a vibration device to eliminate seizures during the construction of oil and gas wells. Scientific Petroleum, 1, 32-42.
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Long-term operation of gas fields is accompanied by changes in the stress-strain state of the productive reservoir, including irreversible processes of its destruction. The destruction of a productive reservoir is one of the reasons for the removal of mechanical impurities at the wellhead, abrasive wear, metal degradation, the appearance of defects in pipelines, equipment and wellhead binding. In order to avoid serious consequences from the development of defects due to the removal of impurities, various examinations are carried out using non-destructive testing methods. The need to monitor the actual condition of pipelines and wellhead equipment of wells operating the Cenomanian and Valanginian formations is due to the fact that during operation significant damage and destruction of the main elements of technological equipment may occur due to the removal of mechanical impurities, water, as well as the formation of hydrates, sand jams, etc., this can lead to serious economic losses, as well as the negative impact on the environment as a result of leaky connections and assemblies. Thus, in order to ensure reliable operation of producing gas wells in conditions of destruction of the bottom-hole zone of the well, it is necessary to choose a reasonable technological mode of operation, in which the risk of formation of sand and liquid plugs is reduced, and the negative impact of the removal of impurities on the condition of the equipment is minimized.

Keywords: gas well; numerical modeling; bottom-hole zone; technological mode.

References

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In the article there has been proposed method of operative estimation of the current reservoir pressure distribution from normal well operation data. The method is based on the algorithm including current distribution calculation of function values for potential and filtration velocity in the oilfild selected area. The method allows to monitor the current distribution of the reservoir pressure in the productive formation of the area under consideration, as well as to assess the effectiveness of the impact on the reservoir in order to maintain the reservoir pressure. The implementation of the proposed method, demonstrated on the example of the "Neft Dashlary" (X horizon, block V) oilfield data, showed high accuracy of the obtained calculated values. The average value of the relative error of the calculated values of the reservoir pressure to the actual values of the downhole pressure measurements at the wells is not more than 1%, and the average calculated value of the reservoir pressure in the productive formation in the pilot area coincides with its actual present value.

Keywords: reservoir; reservoir pressure; reservoir enhanced oil recovery; zonal impact; productive horizon; well productivity; diagnostics; filtration; monitoring; streamlines.

References

1. Suleimanov, B. A., Guseinova, N. I. (2023). Visualization of reservoir fluid filtration characteristics distribution, as a method of oil field development management. SOCAR Proceedings, SI1, 35-45.
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4. Ibrahimov, Kh. M., Huseynova, N. I., Hajiyev, A. A. (2021). Development of new controlling methods for the impact on the productive formation for «Neft Dashlary» oilfield. Scientific Petroleum, 1, 37-42.
5. Jamalbayov, M. A., Ibrahimov, Kh. M. (2023). New waterflooding efficiency evaluation method (on the example of 9th horizon of the Guneshli field). Scientific Petroleum, 1, 43-47.
6. Latifov, Y. A. (2021). Non-stationary effect of thermoactive polymer composition for deep leveling of filtration profile. Scientific Petroleum, 1, 25-30.
7. Suleimanov, B. A., Latifov, Ya. A., Ibrahimov, Kh. M., Guseinova, N. I. (2017). Field testing results of enhanced oil recovery technologies using thermoactive polymer compositions. SOCAR Proceedings, 3, 17-31.

Theoretical and experimental studies of the effect of the geometry of the pore space on the wettability of collectors have been carried out. The special structure of the pore space of the Talinskaya area of the Krasnoleninsky deposit, due to the heterogeneity of the composition of rocks, leads to heterogeneity in the size and geometry of filtration channels and affects wettability. The specificity of the adsorption of polar components of oil causes changes in wettability and affects the amount of adsorbed oil.

Keywords: pore space geometry; adsorbed fluids; wettability.

References

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The operating principle of the oil production by intermittent gas lift (IGL) technology and the mechanical processes occurring in it are complex with many different stages and many flows interacting with each other in each stage. This leads to many difficulties in calculating and optimizing oil well production system with IGL technology. This study develops a hydrodynamic simulation model of the flows occurring during oil production by IGL. By improving until now published hydrodynamic simulations the model in this work is developed based on changes/adjustments to be applicable for specific field conditions. Simulation of the IGL process is performed based on numerical solutions of the systems of conservation equations of mass and momentum and closure equations for each system component and each stage of the IGL process. The ordinary differential equations in the model are solved by the implicit Euler method. The simulation program has been developed and used in selecting a reasonable design of IGL technology for an oil well previously produced by the continuous gas lift (CGL). After the IGL system was installed and put into operation, the daily liquid production rate of the well increased by 91% and the measured data showed good agreement with the simulated results. The application result has initially demonstrated the applicability of the proposed model and the developed simulation program.

Keywords: well; intermittent gas lift; simulation model; oil production.

References

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When vertical wells are drilled to produce gas and gas-condensate fields, the natural fracture orientation in fractured porous reservoirs does not actually have any influence on their productivity. However, the natural-fracture orientation, intensity and opening is critical when we forecast performance of the gas field produced with horizontal wells. This paper discusses the challenges we face while simulating production of the fields or their parts with fractured porous reservoirs using horizontal wells. 

Keywords: reservoir; terrigenous; carbonate; fracture; simulation; part of the field; horizontal well.

References

1. Suleimanov, B. A., Veliyev, E. F., Aliyev, A. A. (2023). Oil and gas well cementing for engineers. UK: John Wiley & Sons Ltd.
2. Suleimanov, B. A., Veliyev, E. F., Shovgenov, A. D. (2022). Theoretical and practical foundations of well cementing. Moscow-Izhevsk: ICR.
3. Aliyev, Z. S., Marakov, D. A., Kotlyarova, E. M., et al. (2014). Theoretical and engineering basics of using horizontal wells to produce gas and gas-condensate fields. Moscow: Nedra.
4. Aliyev, Z. S., Marakov, D. A., Adzynova, F. A. (2022). Justification and selection of starting production rates and pressure drawdowns for the horizontal wells subject to reservoir capacity and flow properties and horizontal wellbore section design. SOCAR Proceedings, 2, 23-27.
5. Aliyev, Z. S., Marakov, D. A., Adzynova, F. A. (2022). Features of control over the development of gas and gas condensate fields using horizontal wells. SOCAR Proceedings, SI2, 138-143.

The article deals with the problem of enhanced oil recovery (EOR), which arises in connection with the steady decline in oil production and active depletion of reserves. The water cut of production wells leads to a decrease in oil production and a decrease in the rate of recovery of recoverable reserves. Among the factors influencing this process, both an increase in the water cut of the productive formation itself and the presence of cracks in the layers below the productive formation lead to a decrease in the effectiveness of the third methods of treatment. In this case, water ingress into the reservoir from fractured reservoirs below the reservoir or inefficient use of a certain part of the water injected into the reservoir to displace oil from the reservoir through fractures leads to a decrease in the oil recovery factor. Therefore, creating a screen at the bottom of the productive formation can ensure the efficiency of work. For this purpose, experiments were carried out in the direction of preparing a composition for waterproofing works using certain reagents. Here, the mechanism of interaction of aluminum chloride with alkaline reagents was studied and their optimal ratio in EOR technologies was evaluated. Water-insoluble precipitates are formed as a result of the interaction of aluminum chloride and alkaline reagents.

Keywords: field; oil recovery; reaction; alkali; reagents; temperature; foundation.

References

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7. Suleimanov, B. A., Veliyev, E. F., Naghiyeva, N. V. (2020). Preformed particle gels for enhanced oil recovery. International Journal of Modern Physics B, 34(28), 2050260.
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The article considers aspects of chemical reactions in samples of Shchelkovsky UGS reservoir water when pumping hydrogen as a result of electrical action. The increased hydrogen content in geological formations may contribute to oxidation and reduction reactions that lead to hydrogen oxidation and electron acceptor recovery (NO3-, Fe3+, SO2- and CO2-).

Keywords: electrostatic action; hydrogen injection; underground gas storage; Ph; Eh.

References

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The modern development of the resource base of the Volga-Ural oil and gas province is characterized by a reduction in the share of highly productive development facilities. The emphasis is shifting towards the operation of low-productivity collectors. Improving the efficiency of managing such assets requires timely monitoring of the energy state of deposits, reasonable selection of geological and technological measures. The approach to monitoring reservoir pressure in this case should differ from the standard, a combination of the most effective research methods is necessary. In conditions of low productivity, methods based on long-term monitoring of reservoir pressure with subsequent data processing using special techniques have proven themselves well. Ultimately, the combination of various methods for monitoring the energy state of low-yielding carbonate reservoirs allows you to individually create an effective research program that allows you to further manage the development. The presented article is devoted to solving these problems. 

Keywords: carbonate reservoir; permeability; pressure recovery curve; thermomanometric systems; multi-well retrospective test; control piezometric well stock.

References

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As the main document in the development of multilateral well completion technology, a business plan is adopted, where technical problems are considered, due to the characteristics of the development object and the level of technology perfection. As an element of the technology, the technology of multilateral completion of wells under the conditions of equilibrium drilling and drilling using a flexible tubing string (coiled tubing) is considered.

Keywords: multilateral well completion; horizontal well; development object; technical and economic effect; production characteristics; knowledge map; multidisciplinary team.

References

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2. Khisamiev, T. R., Bashirov, I. R., Mukhametshin, V. Sh., et al. (2021). Results of the development system optimization and increasing the efficiency of carbonate reserves extraction of the Turney stage of the Chetyrmansky deposit. SOCAR Proceedings, SI2, 131-142.
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This article presents the results of theoretical studies of the mechanism of the effect of CO₂ on residual oil in depleted fields. The task of studying the filtration processes of gas-liquid mixtures has been solved using mathematical modeling. A hydrodynamic model of the process of oil displacement by carbon dioxide is proposed, from which, under certain assumptions, equations describing various mechanisms of displacement can be obtained. In addition, methods for calculating the process of flooding of reservoirs with the use of carbon dioxide are considered. Using the example of a landfill site of one of the Ural-Volga deposits, the forecast technological efficiency of using carbon dioxide to increase oil recovery is calculated.

Keywords: efficiency improvement; modeling; oil displacement; injection; carbon dioxide; oil recovery.

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The article presents the results of experimental application of autonomous-type inflow control devices in conditions of a terrigenous reservoir with the presence of oil and water zones. Conceptual approaches to modeling the completion design when making decisions about development with the installation of inflow control are reflected. The problems of premature watering of wells, including horizontal ones, are shown. According to the results of the application of the inflow control unit on the layers of the Bobrikovsko-Radaevsky horizon, the positive potential of widespread introduction on waterfowl-type reservoirs has been confirmed. The recommendations on the need for further search for the optimal finishing design are substantiated. The high practical significance of the devices considered by the authors for implementation in the fields of the Volga-Ural oil and gas province with similar geological and physical characteristics, including for terrigenous objects, is noted.

Keywords: inflow control devices; terrigenous collector; horizontal borehole; watering; cone formation; plantar water; displacement characteristics.

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For the first time in the practice of horizontal well flooding the study investigates the influence of horizontal well length, number of stages, and proppant loading on productivity during hydraulic development of low-permeability reservoirs using horizontal wells. To increase the sweep efficiency in systems with horizontal wells, a new development systems configuration is proposed, relying on longitudinal horizontal production wells and transverse horizontal injection wells with respect to the regional stress direction. The use of this configuration will not only increase the efficiency of reservoir pressure maintenance systems, but also reduce capital costs for well construction by reducing the injection wells to production wells ratio per development unit while maintaining system stiffness.

Keywords: horizontal injection well; Auto-HF fracture; low-permeability reservoir; reservoir pressure maintenance system; oil recovery ratio increasing

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The subject of the study is to study the influence of the well grid density for a low-permeable heterogeneous terrigenous formation in order to determine the optimal strategy for the reserves development. The paper analyzes various development systems implemented at the facility, as well as changes that occurred as a result of infill well drilling. In the process of information processing, actual data on the operation of wells at various sites were used, the values of recoverable reserves were estimated using statistical methods, calculations of various options were carried out using a hydrodynamic model in order to determine the implemented systems effectiveness, as well as to find ways to optimize them. It was found that for the conditions considered, the well grid infilling made it possible to increase the recoverable reserves amount by increasing the reservoir development coverage. Within the framework of the considered geological facility, the functional dependence of the oil recovery ratio and the the well grid density is obtained. The proxy modeling has shown that the necessary condition for maintaining the selections intensity is to maintain the flooding system rigidity. Taking into account the results obtained, the paper describes an approach based on which the potential for additional local grid infilling was estimated, taking into account the geological potential for involving reserves in development and the technological risk associated with zones of abnormally high reservoir pressure.

Keywords: field development, low-permeability reservoirs, hard-to-recover reserves, infilling, drilling.

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The problem of efficient use of coal fly ash (CFA) is a global environmental problem that requires urgent attention and immediate action to address it. Research shows that huge amounts of CFA are generated every year, but only 25% of the waste is recycled. To overcome this alarming situation, there is a need to focus on increasing the use of coal ash in various industries. The promising uses of coal ash in construction, electronics, resource recycling, wastewater treatment, agriculture and other industries require further research. Of particular interest is the use of coal ash in industrial processes for the extraction of hydrocarbons. The physical, chemical and mineralogical properties of ash, such as its morphology, surface area, porosity and chemical composition, make it an ideal material for various field processes. Increasing the use of coal ash in various industries and its use in industrial processes for the extraction of hydrocarbon raw materials will significantly increase the level of utilization and reduce the negative impact on the environment.

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The article presents an analytical review of magnetic oil treatment, which is an innovative method for preventing complications such as wax deposits and high viscosity of oil. It is concluded that the magnetic treatment of oil is associated with a change in the electrospin state and the evolution of radical pairs of asphaltenes, which are complex with ferromagnetic particles. This leads to an increase in intrinsic magnetic moments, structural rearrangement of supramolecular asphaltene structures and a change in the rheological parameters of oil. The destruction of the «armor shell» occurs due to the influence of the magnetic field on these complexes, which leads to the prevention of the formation of wax and salt deposits and the acceleration of water coagulation processes. The factors of effective magnetic treatment are oils with a high content of iron compounds, salt ions. The effective parameters of magnetic processing are generalized: high values of magnetic induction (up to 1 T), pulse repetition frequency from 5 to 30 Hz. The main advantages and disadvantages of permanent and alternating magnetic field devices are analyzed. A review of the results of industrial and laboratory studies on magnetic oil treatment is carried out. The maximum efficiency in reducing viscosity is 375%, reducing the deposition rate of paraffin is 87.5%, reducing the mass of wax deposits is 50%, reducing the corrosion rate is 45%.

Keywords: magnetic treatment of crude oil; influence magnetic field on the oil; wax deposits; high-viscosity oil; heavy oil.

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The study investigated the thermophysical properties of suspensions containing Ni₃(μ₃-ppza)4Cl₂ metal string complex (MSC) microparticles in aqueous glycerol solutions. The results showed that the use of microparticles of monocrystalline metal string complexes Ni₃(μ₃-ppza)4Cl₂ and Ni₅(μ₅-pppmda)4Cl₂ leds to the highest thermal conductivity enhancements and a decrease in freezing point. A comparative analysis of thermal conductivity enhancements of suspensions with micro- and nanoparticles was also conducted. Compared to the base fluid, at 5% volume fraction Ni₃-water-glycerol showed a 72% increase in thermal conductivity, while Cu-water-glycerol and Ni5-water-glycerol showed enhancements of 53% and 47%, respectively. The study suggests that the higher stability of suspensions with MSC microparticles, due to the formation of hydrogen bonds between the organic fragments of particles and water molecules, thier lower density and the formation of particle assemblies, is responsible for the significant thermal conductivity enhancement compared to nanofluids. The colloidal structure of suspensions with MSC microparticles greatly affects their thermophysical properties.

Keywords: nanofluid, microfluid, metal string complex, thermal conductivity, suspension.

References

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Global heavy oil reserves are the largest hydrocarbon resource in the world, with Venezuela's heavy oil reserves accounting for 87% of initial oil reserves; 258.3 out of 297.7 billion barrels. Primary oil production from such formations does not allow achieving a high recovery factor, which is only 5 to 10% due to the high viscosity of the reservoir oil and low mobility. The main purpose of the work is to determine the hierarchy and, with its help, preliminary selection of enhanced oil recovery (EOR) methods for the current reservoir conditions of the Carabobo 2 North block of the Petrovictoria joint venture, Venezuela. The methodology for selecting promising enhanced oil recovery methods for the created geological model of one of the objects for the potential application of enhanced oil recovery (EOR) methods in Venezuela (Orinoco Belt, Carabobo 2 North Block) is formed using applicability criteria. An EOR for an object based on the theory of fuzzy sets is proposed and evaluated. The main purpose of the work is to create a hierarchy and preliminary selection of methods for increasing oil recovery for the current conditions of the formation of the Carabobo 2 North block of the Petrovictoria joint venture, Venezuela. The method of selection (screening) of promising methods of increasing oil recovery for the created geological model of one of the objects of potential application of the Venezuelan EOR (North, Orinoco Belt), formed using the criteria of applicability and selection of the most promising EOR for the object, based on the theory of fuzzy sets, is presented and tested

Keywords: heavy oil; enhanced oil recovery (EOR); EOR selection (screening); Orinoco Belt.

References

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At long-operating fields, due to a drop in reservoir pressure and temperature in the bottom-hole zone of wells as a result of degassing, light oil fractions volatilize and heavy fractions deposit on the rock surface, which leads to weakened filtration and reduced productivity. On the other hand, these particles deposited in the pores hydrophobize the rock surface, and water passing through this surface mixes with the deposited hydrocarbons to form an emulsion. The emulsion formed reduces phase conductivity. For effective exploitation of this type of oil fields, compositions that have a stronger effect on the bottom-hole zone and are more economically feasible have been developed and their properties have been studied. As a result of these studies it was revealed that with the addition of small concentrations of metallic nanoparticles to compositions consisting of solvents and surfactants, the ability of the developed new composition to dissolve asphaltene-tar-paraffin deposits is significantly increased.

Keywords: asphaltene-resin-paraffin deposits; metal nanoparticles; surfactants; solvents; new composition.

References

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The stress-strain state of a polymer reinforced pipeline of small diameter, which is part of a capillary system for supplying chemical reagents to oil wells, is studied in the work. The pipeline is loaded with internal pressure and secured with one end in a rigid seal. To solve the equations of the mathematical model, the finite element method is applied in the COMSOL Multiphysics numerical modeling environment. On the basis of numerical experiments, equivalent stresses in the polymer and steel wire of the braid are determined. The region of maximum equivalent stresses, which is located at a distance of 15 mm from the seal, has been identified. The limit values of the internal pressure of 23 MPa have been determined, the excess of which leads to an increase in plastic deformation in the polymer and depressurization of the pipeline.

Keywords: polymer reinforced pipeline; pressure; depressurization; equivalent stresses; deformation; model.

References

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The brief information contains information about the surfacing of pipes at the underwater crossing of the Bovanenkovo-Ukhta gas pipeline, laid in the Kara Sea, and describes the design features of the concreted pipes. In the formulation of the problem of the stressstrain state (SSS) of the underwater crossing of an offshore gas pipeline, it is conventionally divided into the middle and extreme parts. In the middle part, the pipe is completely flooded and exposed due to the erosion of soil from it. In the extreme underground parts in which expansion joints are installed, the pipe is not exposed; it remains in the trench, covered with soil during the construction of the pipeline. The problem was solved by the finite element method in displacements. Calculations of the SSS of the gas pipeline section were carried out taking into account the uneven settlement of the foundation soil, different values of operating parameters and the installation of compensator stops of various designs. Using a numerical experiment, critical values of operating parameters were found and the effective operation of compensator stops of various designs was revealed.

Keywords: gas pipeline; concreted pipe; soil; bending; deflection; stress; pressure; force; ascent; compensator-stop.

References

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In this paper presents the development of a fuzzy controller for adaptive control of the parameters of the activated carbon adsorption process. The main objective of the developed control system is to increase the efficiency of the control of the technological process of adsorption by using intelligent technologies. It should be noted that the methodological basis for the design of fuzzy controllers is the concept of fuzzy logic. Also, for the development of fuzzy controllers for an adaptive control system, a model of the absorption process in the adsorber is constructed, taking into account multiple relationships between the parameters of the technological process. The conceptual model of the control object was developed taking into account the inherent internal relationships between the parameters of the technological regime and external disturbing factors. That is, fuzzy adaptive control allows you to adapt to changes in the technological parameters of the adsorption process by changing the control algorithm of the technological process. The expediency of using for adaptive control of technological parameters of the adsorption process by using fuzzy controllers is substantiated. The development of an adaptive control system based on fuzzy controllers was carried out using MatLab software, where a control model of the adsorption technological process was built, and the results were obtained and analyzed. Thus, fuzzy controllers evaluate critical situations and also regulate the parameters of the adsorption process based on logical rules.

Keywords: adsorption; activated carbon; ethanol; fuzzy controller; system control; process parameters; adaptive control; fuzzy logic.

References

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In the article, based on SOCAR’s statistical indicators covering 2008-2022, the efficiency of using fixed assets in oil production of the Republic of Azerbaijan was analyzed and assessed. Here, SOCAR's sales revenues, total cost of products sold, total profit and the amount of private capital were analyzed. During the period under study, the efficiency of use of SOCAR's private capital, the level of profitability of private capital, as well as the speed of turnover of private capital were assessed. In the article, based on the Eviews-12 application package, a correlation and regression analysis of the dependence between SOCAR’s income from the sale of manufactured products, capital investments and special capital was carried out.

Keywords: private capital; level of profitability; turnover; efficiency; application package; correlation; regression; model; adequacy; heteroxedasticity; autocorrelation.

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The article analyzes the technical and regulatory restrictions that complicate the production of hydrocarbons at the final stage of operation, as well as the directions of resource and innovative development of the fuel and energy complex in the context of sanctions and restrictions in the development of national priorities. The features of regulatory regulation of legislation and indicators of digital transformation for previously developed fields and the preservation of hydrocarbon markets, the development of national economies in the long term, taking into account the widespread use of intelligent technologies and digital platforms, are considered. Taking into account the advantages of technology, it is strongly recommended to implement a project of digitalization of oil and gas wells using fiber-optic technologies. This will allow the creation of intelligent wells and deposits, which, with limited financial resources, will ensure an increase in recoverable reserves of gas and oil production by at least 10% during operation, will reduce the downtime of wells by about 50% from the initial level and will reduce operating costs by 10-25%.

Keywords: automation; mining; modeling; regulation; transformation; innovation; intelligent technology; digital economy; digital platform.

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