Chronology of Development and Application of Enhanced Oil Recovery Methods on Example of Deposits of Republic of Bashkortostan

This paper reviews the achievements of the scientific school of Academician of the Academy of Sciences of the Republic of Bashkortostan, Professor of the Ufa State Petroleum Technological University (USPTU) D.L. Rakhmankulov in the field of applied and oilfield chemistry. Having achieved fundamental results during theoretical and experimental research into the structure, properties and mechanisms of transformations of substituted cyclic acetals and heteroanalogues, D.L. Rakhmankulov and his colleagues proposed to apply this knowledge in various sectors of the national economy, in particular, in the oilfield chemistry. An analysis of copyright certificates obtained by the researchers from the 1970s to the 1990s, which were related to the development of reagents of the class of cyclic acetals intended for use in the oilfield chemistry, showed that the obtained reagents can be effectively used as components of drilling fluids, inhibitors of hydrogen sulphide corrosion of oilfield equipment, bactericidal reagents that inhibit the growth of sulphate-reducing bacteria. The efficiency of such reagents significantly exceeded that of well-known industrial reagents. It was noted that aqueous compositions containing 1,3-dioxacycloalkanes dissolve and keep in volume particles of resins and asphaltenes in the form of microemulsions, which makes it possible to increase oil recovery and use cyclic acetals as reagents-solvents of asphalt-resin-paraffin deposits. It was found that the use of cyclic acetals, e.g. 4,4-dimethyl-1,3-dioxane, in the composition of drilling fluids can significantly improve their lubricating, antiwear and anticorrosive properties. By-products of petrochemical industries were often used as a raw material for the production of compounds of the class of cyclic acetals, which at the same time solved the problem of their recycling. It was found that the bottom residue of industrial production of 4,4-dimethyl-1,3-dioxane, containing oxymethyl-1,3-dioxanes, can be successfully used for dissolving gypsum hydrocarbon fuels deposited in oil wells. In order to expand the range of reagents that inhibit the growth of sulphate-reducing bacteria, D.L. Rakhmankulov and his colleagues proposed to use aqueous solutions of 1,3-dioxacycloalkanes as bactericides.

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Advances and achievements of Academician D.L. Rakhmankulov’s scientific school in the field of applied and oilfield chemistry

Mikhailova

Мамлиева

Тептерева

et al. 2021

Izvestiâ vuzov. Prikladnaâ himiâ i biotehnologiâ

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Electromagnetic technologies in the system of oil production innovative methods at the fields of the Republic of Bashkortostan

Rabtsevich

2023

Izvestiâ vysših učebnyh zavedenij. Neftʹ i gaz

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An increase in the share of hard-to-recover oil in the total balance of its reserves, which is particularly important for the Republic of Bashkortostan, inevitably makes it necessary to search for and commercially introduce new ways to extract it. Among the many methods of increasing oil recovery and intensifying the inflow, the method of influencing the bottomhole zone of the formation with a high-frequency electromagnetic field is distinguished, which, despite many years of research, is still considered experimental in Russia and is limited to evaluating the production and technical characteristics of use. At the same time, financial and economic indicators are overlooked, the identification of which will justify the relative low cost and high profitability of the innovative method.The purpose of the study is to determine the feasibility of introducing methods of oil field development based on the use of electromagnetic field energy. The main research methods are the analysis of scientific literature on the research topic, systematization and generalization of specialized state statistics data. The calculation part uses methods of economic analysis and business analytics.The existing technologies for oil field development in the Republic of Bashkortostan are considered, a conclusion is made about their obsolescence and the need to replace them with technologies based on new physical principles. The prospects of electromagnetic technologies and the degree of development of this topic in the scientific environment of Russia and the Republic of Bashkortostan are indicated. With the help of modelling, the economic effect of the introduction of technology for influencing the bottomhole zone of the formation with a high-frequency electromagnetic field has been established, the possibilities of covering the deposits of the Republic of Bashkortostan suitable for development have been determined.The results of the study can be used in the analysis of the prospects of regions with the predominant development of the oil production and oil refining complex, on the territory of which there are large areas of depleted fields that require the use of innovative technologies for additional production. Further research may be devoted to assessing the economic and technological efficiency of using electromagnetic and other innovative technologies for influencing the reservoir directly in fields with different properties of residual oil and geological and geophysical parameters of the host reservoirs.

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Chronology of Development and Application of Enhanced Oil Recovery Methods on Example of Deposits of Republic of Bashkortostan

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Advances and achievements of Academician D.L. Rakhmankulov’s scientific school in the field of applied and oilfield chemistry

Advances and achievements of Academician D.L. Rakhmankulov’s scientific school in the field of applied and oilfield chemistry

Electromagnetic technologies in the system of oil production innovative methods at the fields of the Republic of Bashkortostan

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