Zoning is based on the provided geological and geophysical data, subject to the availability of three multilevel regmatic systems of inclined and shear discontinuous faults in the Earth's upper crust, formed as a result of the Neogene-Quaternary geodynamics of uneven bilateral horizontal compression. The developed geotectonic map displays a double-level geological environment with a relatively hard base and a more plastic covering thickness. The lower level is represented by a combination of isometric and linear heterogeneous blocks located at four hypsometric levels. The upper level is represented by a smooth aggregate of blocks, separated by large rupture anomalies or flexural fault zones. Individual blocks of Paleozoic fissured rocks with overlapping deposits that are subject to slight compression or stretching, and are located on hydrocarbon migration paths from oil and gas generation centers collected in Paleozoic rift systems, can be considered as possible oil and gas prospect objects.

Keywords: geological and geophysical data; geotectonic zoning; geotectonic map; geological environment; hypsometric levels.

References

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In paper authors used Beal, Cleaver-Yates and Escobedo-Mansoori models for the modelling of asphaltene deposition. After running the model, sensitivity analyses performed on hydrodynamic and fluid properties parameters. This show that flow rate and fluid viscosity have a reverse effect , tubing roughness and fluid density have a direct effect on the asphaltene deposition coefficient. Also, wellhead pressure and tubing inside diameter have not significant effect on asphaltene deposition coefficient. In addition, calculation showed that by 1000 days of oil production, tubing inside diameter decreases up to 0.6 inch. By applying PSO optimization algorithm, optimal conditions for maximum cumulative production by minimum asphaltene deposited thickness was obtained. Optimization results showed that the optimum values for the tubing diameter and the choke size is 4.25 inch and 48/64 inch. Consequently, the maximum deposited asphaltene and cumulative production were predicted about 0.32 inch and 5.6×10⁷ bbl.

Keywords: asphaltene precipitation; asphaltene deposition; sensitivity analysis; optimization; modelling of asphaltene deposition.

References

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13. Hematfar, V., Ghazanfari, M.H., and Bagheri, M.B. (2010, June). Modeling and optimization of asphaltene deposition in porous media using genetic algorithm technique. SPE-130455-MS. In International Oil and Gas Conference and Exhibition in China. Society of Petroleum Engineers.
14. Hasanvand, M.Z., Montazeri, M., Salehzadeh, M., et al. (2018). A literature review of asphaltene entity, precipitation, and deposition: introducing recent models of deposition in the well column. Journal of Oil, Gas and Petrochemical Sciences, 1(3), 83-89.
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It is well known that viscous oil displacement process is optimized with thickened water injection. For example to form thickened water a high molecular weight polyacrylamide (PAM) dilute in water with a concentration of 0.05-0.1%. The process is carried out until 20% of the formation pore volume injected, afterwards pushed with ordinary water, which results in a stable displacement, close to piston-like displacement (the water fingering become more homogenous). The absence of a gas component in thickened water injection technology makes displacement of viscous oil relatively less efficient. Thus advisable to combine SWAG injection with thickened water technology.

Keywords: simultaneously water; alternative gas; water injection; thickened water; polyacrylamide (PAM); oil displacement; pore volume.

References

1. Suleimanov, B.A., Latifov, Y.A., Veliyev, E.F., & Frampton, H. (2018). Comparative analysis of the EOR mechanisms by using low salinity and low hardness alkaline water. Journal of Petroleum Science and Engineering, 162, 35-43.
2. Suleimanov, B.A., Ismayilov, F.S., Veliyev, E.F., & Dyshin, O.A. (2016). Selection methodology for screening evaluation of EOR methods. Petroleum Science and Technology, 34(10), 961-970.
3. Suleimanov, B.A., Ismailov, F.S., Veliyev, E.F. & Dyshin, O.A. (2016, October). Screening evaluation of EOR methods based on fuzzy logic and bayesian inference mechanisms. SPE-182044-MS. In: SPE Russian Petroleum Technology Conference and Exhibition. Society of Petroleum Engineers.
4. Suleimanov, B.A. & Veliyev, E.F. (2017). Novel polymeric nanogel as diversion agent for enhanced oil recovery. Petroleum Science and Technology, 35(4), 319-326.
5. Suleimanov, B.A., Veliyev, E.F., & Dyshin, O.A. (2015). Effect of nanoparticles on the compressive strength of polymer gels used for enhanced oil recovery (EOR). Petroleum Science and Technology, 33(10), 1133-1140.
6. Suleimanov, B.A., Latifov, Y.A., Veliyev, E.F. (2019). Softened water application for enhanced oil recovery. SOCAR Proceedings, 1, 19-28
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15. Technological scheme of ODA for testing the technology of water and gas impact (HBV) at Kalamkas field. Report of JSC «KazSRPIoilgaz», 2011.
16. Experimental evaluation based on comparative filtration studies on the disintegrated core material of the effectiveness of the application of water-gas impact (HBV) technology at the Kalamkas deposit. VNIIOil report under the Agreement № 61/10//180/01-013/10 from 01.07.2010. Moscow, 2010.
17. Masket, M. (2004). The flow of homogeneous liquids in a porous medium». Moscow-Izhevsk: Institute of Computer Research.
18. Gershtanskii, O.S., Mullayev, B.T., Kurbanbayev, M.I., et al. (2009). Method for developing an oil and gas field (productive reservoir) using water-gas impact technology. Application for the invention of the Republic of Kazakhstan №2009/1038.1.
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The success of oil and gas field development is pretty much due to the choice of development technology and methods of operations conducted. The most important thing is correct organization of the process of reservoir fluids displacement with the injection of various displacing agents. The usage of chemical additives can significantly change the nature of displacement. Polymer solutions injections into the productive reservoir is one of the ways to increase the efficiency of flooding. Therefore, the building of mathematical models of the displacement process through chemically active agents allows us to optimize methods of displacement by selecting the appropriate composition of the displacing fluid and appropriate technological scheme of organization process.

Keywords: mathematical modeling; percolation theory; chemical effects; displacement efficiency; polymer flooding.

References

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A method to prevent well sanding-up using metals with a negative electrode potential is proposed in the article. It is shown that the coating film of metals with low negative electrode potentials below 0.7V applied on tubing enables to prevent well sanding-up. In this case, the height of the metal coating with a negative electrode potential of the inner surface of the tubing should be equal to the maximum height of the sand plug in the field. The mechanism of observed responses based on the DLVO theory is proposed.

Keywords: sand plug; standard electrode potential; well; tubing; oil and gas production.

References

1. Suleimanov, B.A. & Veliyev, E.F. (2017). Novel polymeric nanogel as diversion agent for enhanced oil recovery. Petroleum Science and Technology, 35(4), 319-326.
2. Suleimanov, B.A., Latifov, Y.A., Veliyev, E.F., & Frampton, H. (2018). Comparative analysis of the EOR mechanisms by using low salinity and low hardness alkaline water. Journal of Petroleum Science and Engineering, 162, 35-43.
3. Suleimanov, B.A., Ismailov, F.S., Veliyev, E.F. & Dyshin, O.A. (2016, October). Screening evaluation of EOR methods based on fuzzy logic and bayesian inference mechanisms. SPE-182044-MS. In: SPE Russian Petroleum Technology Conference and Exhibition. Society of Petroleum Engineers.
4. Suleimanov, B. A., Ismayilov, F. S., Veliyev, E. F., & Dyshin, O. A. (2016). Selection methodology for screening evaluation of EOR methods. Petroleum Science and Technology, 34(10), 961-970.
5. Suleimanov, B. A., Ismayilov, F. S., & Veliyev, E. F. (2014). On the metal nanoparticles effect on the strength of polymer gels based on carboxymethyl cellulose, app;ying at oil recovery. Oil Industry, 1, 86-88.
6. Suleimanov, B. A., Ismayilov, F. S., Veliyev, E. F., & Dyshin, O. A. (2013). The influence of light metal nanoparticles on the strength pf polymer gels used in oil industry. SOCAR Proceedings, 2, 24-28.
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8. Suleimanov, B.A., Azizov, F., & Abbasov, E.M. (1998). Specific features of the gas-liquid mixture filtration. Acta Mechanica, 130(1-2), 121-133.
9. Suleimanov, B.A. (1995). Filtration of disperse systems in a nonhomogenenous porous medium. Colloid Journal, 57(5), 704-707.
10. Suleimanov, B.A. (2011). Sand plug washing with gassy fluids. SOCAR Proceedings, 1, 30-36.
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Disintegrated rocks create complications during excavation of wells. Preventing the drainage zone from collapsing and entering the sand well a special filter for propantwash detergents. The device allows the propante to be tightly placed behind the filter and, if necessary, the propane is washed and removed. The rigs are designed to prevent sand from falling into the plunger cylinder. The unit facilitates the capture and accumulation of large sand grains within the pump-compressor tubing. The pump is designed to prevent fluid leakage from the plunger cylinder. As a result, we remove the possibility that boththe fluid leakage and the plunger splinter in the cylinder from the plunger cylinder.

Keywords: propant; well; bottome-zone; filter; crossover; plunger-cylinder; pump; leakage

References

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The article suggests a method to allow to calculate the optimum operating conditions of centrifu-gal pumps with a gas turbine drive of different unit power when operating in accordance with the scheme in the «parallel› in the main oil transport, from the equipment operating condition in the area of the maximum efficiency value.

Keywords: optimization; centrifugal pump; gas turbine plant; efficiency factor; efficiency

References

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The article presents the results of an experimental study assessing the adhesion properties of in-tube smooth-bicke silicate-enamel and powder epoxy coatings to determine their effectiveness in preventing the precipitation of asphalt-resin-paraffin deposits from the oil transported on the Yarega-Ukhta pipeline. The purpose of the research was to determine the strength of adhesion of asphalt-resin-paraffin deposits to the surface of silicate-enamel and powder epoxy coatings depending on the temperature of the samples and to compare the results with those obtained on the sample of the uncoated pipe.

Keywords: adhesion; asphalt-resin-paraffin deposits; oil pipeline; high-viscosity oil; smooth interior coating.

References

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The article considers methodical approaches to the estimation of the economic efficiency of design solutions when installing a compressor station taking into account the risk component taken into account at the stage of development of design solutions. The methodics in question are based on the methodology for determining net cash flows and the method of discounting them. Also detailed are the methodological provisions for determining operating costs for the operation of compressor plants based on design options and determining net present value. On the example of one of the largest oil and gas fields of the Khanty-Mansiysk Autonomous Okrug – Ugra of the Russian Federation, calculations of the economic efficiency of four installation options for different types of compressors with different equipment and unit capacity are presented. Also from the technological point of view, the necessity of reducing the risk of equipment shutdown, which was taken into account in the discount rate, was justified. The choice of the most effective variant of design decisions was carried out on the basis of criteria of efficiency of investment projects based on the UNIDO methodology.

Keywords: efficiency; investments; associated petroleum gas; compressor station; design risks; design decisions; net present value; feasibility study.

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The article is devoted to the optimization of gas production processes based on the use of digital technologies. The basis of the approach is to improve the quality of management, analysis of the effectiveness of control actions in the presence of integrated model or digital twin of the field. The integrated use of digital technologies and effective management algorithms is the basis for the cost optimization, ensuring the transition to automatic and/or robotic control, and increasing the coefficient of return on capital of major gas assets.. These solutions are particularly effective in regions with difficult climatic conditions or underdeveloped infrastructure, shelf and marine fields. The proposed integrated approach allows extending the periods of profitable exploitation of fields at the stage of declining production and complicated production conditions.

Keywords: digital gas complex; digital gas economy; digital economy; digitalization; intellectualization; robotization; digital wells and fields; intellectualization оf production аnd development

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An analytical review of the environmental characteristics of fire extinguishing compounds used to extinguish fires of oil and petroleum products has been carried out. The presence in the environment of a significant amount of decomposition products of long-chain fluorine-containing hydrocarbons, which are part of fluorine-containing film-forming foams including recently created ones and new compounds is shown. At the same time, the decomposition products of this foam such as perfluorooctane sulfonic acid, perfluorooctane sulfonyl fluoride are related to persistent organic pollutants with bioaccumulative properties. It has led to the appearance of such fire-extinguishing compositions as gel-forming systems with a foam glass carrier. At the same time, there is no unified approach to determining the environmental characteristics of fire extinguishing substances.

Keywords: oil and petroleum products; fire extinguishing agent; fire extinguishing foam; gel-forming system; ecological characteristic; environment.

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