In the class of rheologically stationary (including biviscosity) fluids, the data processing model for rotational viscometry has been described and its advantages compared to used has been shown. Тhe generalization of the model for data processing of the experimental plan has considered with the aim of constructing the equations of state of the rheological properties indicators from the variable factors. The multicriterial interpretation of the rheological properties of liquids has been proposed.Illustrative examples of estimating the rheological properties of drilling fluid has been given.

Keywords: Biviscosity fluid; processing of rotational viscometry data; rheological properties; rheologically stationary model; equation of state.

References

1. Mirzajanzadeh, A.Kh., Karayev, A.K., & Shirin-zadeh, S.A. (1977). Hydraulics in drilling and cementation of oil and gas wells. Moscow: Nedra.
2. Mirzajanzadeh, A.Kh. & Shirin-zadeh, S.A. (1986). Improving the efficiency and quality of drilling deep wells. Moscow: Nedra.
3. Mirzajanzadeh, A.H., Filippov, V.P., & Ametov, I. M. (2002). System methods in oil production. Moscow: Technika.
4. Khasanov, M.M. & Bulgakova, G.T. (2003) Nonlinear and non-eqiulibrium effects in rheological complex environments. Moscow-Izhevsk: Institute for Computer Research.
5. Han, Z., Jiang, G., & Li, Q. (2014). Application of a novel associative polymer on synthetic-based drilling muds for deepwater drilling. SOCAR Proceedings, 2, 4–11. http://dx.doi.org/10.5510/OGP20140200193.
6. Zhou, H.B., Wang, G., Fan, H.H., et al. (2015). A novel prediction model for rheological properties of drilling fluids at HTHP conditions and its evalution. SOCAR Proceedings, 2, 13–22. http://dx.doi.org/10.5510/ OGP20150200238
7. Myslyuk, M.A., Bogoslavets, V.V., Louban, Y.V., et al. (2015). Research of rheological properties of "Biokar" biopolymer system. Construction of Oil and Gas Wells on-Land and off-Shore, 8, 31 – 36.
8. Lipatov, Е.Y. & Aksenova, N.A. (2017). Experience of application of biopolymer emulsion drilling mud while drilling horizontal wells in the Koshilskoye field. SOCAR Proceedings, 4, 36–41. http://dx.doi.org/10.5510/ OGP20170400328
9. Malkin, A.Ya. & Isaev, A. I. (2007). Rheology: concepts, methods, and applications. St. Petersburg: Profession.
10. Osswald, T. & Rudolph, N. (2015). Polymer rheology: fundamentals and applications. Munich: Hanser Publishers.
11. Golubev, D.A. (1979). A valid rheological curves plotting according to the rotational viscometry. Oil Industry, 8, 18-21.
12. Myslyuk, M.A. (1988). Determining rheological parameters for a dispersion system by rotational viscometry. Journal of Engineering Physics and Thermophysics, 54(6), 655 – 658.
13. Kelessidis, V.C. & Maglione, R. (2008). Shear rate corrections for Herschel – Bulkley fluids in Coutte geometry. Applied Rheology, 18(3), 34482 (11 pages).
14. Myslyuk, M.A. & Salyzhyn, Yu.M. (2008). The evaluation of biviscosity fluids rheological properties on the basis of rotational viscometry data. Oil Industry, 12, 12–14.
15. Myslyuk, M. & Salyzhyn, I. (2012). The evaluation rheological parameters of non-Newtonian fluids by rotational viscosimetry. Applied Rheology, 22(3), 32381 (7 pages).
16. Bui, B. T. & Tutuncu, A. N. (2015). A generalized rheological model for drilling fluids with cubic splines. SPE Drilling & Completion, 31(1), 1–14.
17. Myslyuk, M.A. (2016). Rheotechnologies in well drilling. Journal of Hydrocarbon Power Engineering, 3(2), 39–45.

In this paper the process of gas-lift in the oil production is considered. In this process the motions of gas and gas-liquid mixture (GLM) are described by the system of partial differential equations of hyperbolic type. Applying lines method the system of partial differential equations of hyperbolic type is reduced to the system of ordinary differential equations with respect to the volumes of gas, GLM and their pressures. Applying least-squares method, the coefficient of hydraulic resistance (CHR) is obtained on different areas of pump-compressor pipes. On the concrete example the adequacy of the mathematical model is shown.

Keywords: Gas lift; gas-liquid mixture; identification; algebraic equations; coefficient of hydraulic resistance; least-squares method.

References

1. Aliev, F.A., Ilyasov, M.Kh., & Dzhamalbekov, M.A. (2008). The modeling gas lift wells operation. Reports of ANAS, 4, 107-115.
2. Mirzadzhanzade, A.Kh., Ametov, I.M., Khasaev, A.M., & Gusev, V.I. (1986). Oil production technology and equipment. Moscow: Nedra.
3. Shurov, V.I. (1983). Technology and techniques of oil production. Moscow: Nedra.
4. Jamalbayov, M.A. & Veliyev, N.A. (2017). The technique of early determination of reservoir drive of gas condensate and velotail oil deposits on the basis of new diagnosis indicators. TWMS Journal of Pure and Applied Mathematics, 8(2), 236-250.
5. Akbarov, S.D. (2018). Forced vibration of the hydroviscoelastic and-elastic systems consisting of the viscoelastic or elastic plate, compressible viscous fluid and rigid wall: a review. Applied and Computational Mathematics, 17(3), 221-245.
6. Srinivasacharya, D., Swamy Reddy, G. (2018). Mixed convection on a vertical plate embedded in a power-law fluid saturated doubly stratified porous medium. Applied and Computational Mathematics, 17(3), 256-270.
7. Shammazov, A.M., Shammazov, I.A., Baikov, I.R., & Smorodova, O.V. (2018). Optimization of the oil and gas companies energy strategy. SOCAR Proceedings, 4, 65-69. http://dx.doi.org/10.5510/OGP20180400373
8. Shaidakov, V.V., Melnikov, A.P., Chernova, K.V., & Korobkov, G.E. (2018). Efficient drilling-in in the oil and gas wells drilling. SOCAR Proceedings, 4, 26-34. http://dx.doi. org/10.5510/OGP20180400368
9. Aliev, F.A. & İsmailov, N.A. (2013). İnverse problem to determine the hydroulic resistance coeffficient in the gaslift process. Applied and Computational Mathematics, 12(3), 306-313.
10. Maharramov, I.A., Hajiyeva, N.S., & Hajiyeva, S.K. (2017). Identification problem for defining the coefficient of hydraulic resistance on different areas of pumpcompressor pipes in gaslift process. Proceedings of the IAM, 6(2), 233-244.
11. Mukhtarova, N.S. (2015). Algorithm to solution the identification problem for finding the coefficient of hydraulic resistance in gas-lift processes. Proceedings of the IAM, 4(2), 206-213.
12. Aliev, F.A., Ismailov, N.A., Namazov, A.A., & Radjabov, M.F. (2016). Asymptotic method of solution of identification problem for the nonlinear dynamic systems. Proceedings of IAM, 5(1), 84-97.
13. Shterenlikht, D.V. (2005). Hydraulics. Moscow: Kolos.
14. Aliev, F.A., Mutallimov, M.M., Askerov, I.M., & Raguimov, I.S. (2010). Asymptotic method of solution for a problem of construction of optimal gas-lift process modes. Mathematical Problems in Engineering, 2010, Article ID 191053.
15. Barashkin, R.L., & Samarin, I.V. (2006). The modeling gas lift well operation modes. Bulletin of the Tomsk Polytechnic University, 309(6), 42-45.
16. Charniy, I.A. (1951). Unsteady motion of a real liquid in pipes. Moscow: Gostekhizadat.
17. Aliev, F.A., Hajieva, N.S., Namazov, A.A., & Safarova, N.A. (2019). The identification problem for defining the parameters of discrete dynamic system. International Applied Mechanics, 55(1), 128-135.
18. Aliev, F.A., Ilyasov, M.Kh., & Nuriyev, N.B. (2009). The problems of mathematical modeling, optimization and gas lift control. Reports of ANAS, 4, 100-117.
19. Aliev, F.A., Ismailov, N.A., Namazov, A.A., & Radjabov, M.F. (2016). An algorithm for calculating the parameters of formation of gas-liquid mixture on the shoe of gas lift wells. Proceedings of IAM, 5(1), 123-132.
20. Himmebblau, D.M. (1972). Applied nonlinear programming. New-York: Craw-Hill Book Company.
21. Aliev, F.A., Ilyasov, M.Kh., & Nuriyev, N.B. (2010). The problems of modeling and optimal stabilization of the gas lift process. International Applied Mechanics, 46(6), 113-123.
22. Aliev, F.A., Ismailov, N.A., & Mukhtarova, N.S. (2015). Algorithm to determine the optimal solution of a boundary control problem. Automation and Remote Control, 76(4), 627-633.
23. Mutallimov, M.M., Amirova, L.I., Aliev, F.A., et al. (2018). Remarks to the paper: sweep algorithm for solving optimal control problem with multi-point boundary conditions. TWMS Journal of Pure and Applied Mathematics, 9(2), 243-246.
24. Aliev, F.A., Ismailov, N.A., Mamedova, E.V., & Mukhtarova, N. S. (2016). Computational algorithm for solving problem of optimal boundary-control with nonseparated boundary conditions. Journal of Computer and System Sciences International, 55(5), 700-711.
25. Aliev, F.A., Ismailov, N.A., Namazov, A.A., & Rajabov, M.F. (2017). Algorithm for calculating the parameters of formation of gas-liquid mixture in the shoe of gas lift well. Applied and Computational Mathematics, 15(3), 370-376.
26. Altshul, A.D. (1970). Hydraulic resistance. Moscow: Nedra.
27. Hajiyeva, N.S., Safarova, N.A., & Ismailov, N.A. (2017). Algorithm defining the hydraulic resistance coefficient by lines method in gas-lift process. Miskolc Mathematical Notes, 18(2), 771-777.
28. Aliev, F.A. & Ismaylov, N.A. (2014). Algorithm for calculating the coefficient of hydraulic resistance in gas lift process. Reports of ANAS, 1, 19-22.
29. Aliev, F.A., Ismailov, N.A., Haciyev, H., & Guliyev, M.F. (2016). A method to determine the coefficient of hydraulic resistance in different areas of pump-compressor pipes. TWMS Journal of Pure and Applied Mathematics, 7(2), 211-217.
30. Belokopitov, S.V. & Dmitriev, M.G. (1985). The lines method for solution optimal control problems with fast and slow motions. Engineering Cybernetics, 3, 147-152. 

Process flows, both at the well bottom and at the wellhead, usually contain mechanical impurities, which, when collected in the equipment, accumulate at the bottom of the vessels, thereby creating oil sludge. The growth of the sludge layer leads to problems in the efficiency of operation of the equipment due to volume loss, narrowing of the diameter of the pipelines at the outlet, in sumps, tanks and separators, which ultimately reduces the turnaround period of the equipment. To increase the turnaround time of oil and gas separators, improve product separation, and solve problems of reducing base sediments, an improved design of a vertical oil and gas separator has been developed. The developed design of the oil and gas separator solves the main tasks of improving the quality of gas separation from condensate vapor and phase separation from the supplied liquid, as well as cleaning the separator from accumulated base sediments.

Keywords: Gas-liquid vertical separator; design; oil gathering and processing; mechanical impurities; oil emulsion; turnaround time.

References

1. Arnold, К., Stewart, М. (2008). Surface production operations. Design of oil handling systems and facilities. Elsevier, Gulf Professional Publishing.
2. Knyazev, R.V. (2017). Analysis of the well production preparation efficiency at the Russkinskoye field. Modern innovations, 5(19), 69-70.
3. Ling, K., Guo, B., & He, J. (2013). New method to estimate surface-separator optimum operating pressures. SPE-163111-PA. SPE Oil and Gas Facilities, 2(3), 65-76.
4. Baykov, N.M., Pozdnyshev G.N., Mansurov R.I. (1981). Collection and field preparation of oil, gas and water. Moscow: Nedra.
5. Zemenkov, Yu.D., Alexandrov, M.A., Markova, L.M. et al. (2015). Equipment and technologies of oil and gas collection and preparation. Tyumen: TSOGU.
6. Krjukov, V.A. & Vinogradov E.V. (2002). Gas-andliquid separator. RU Patent 2190450.
7. Bojko, S.I., Kasapov, N.K., & Kilinnik, S.V. (2000). Gas-and-liquid separator. RU Patent 2153915.
8. Tolepbergenov, E.K., Suleimanov, B.A., Abitova, A.Zh., Tolepbergenov, N.K. (2017). Gas-liquid vertical separator. EA Patent 027872.

Nowadays, the acid treatment is became one of the widely used and most effective methods of well treatment methods to increase or revive the productivity of wells. However, the most important and crucial step in the planning this technology is the correct selection of acid composition. The success of the acid treatment in terrigenous reservoir depends on the compatibility of the selected acid composition and the mineralogy of porous media, since the chemical reaction underlying the acidic treatment is a key factor in this wellwork. Nevertheless, the accumulated field experience indicates an insufficient degree of elaboration of this issue. Often, the selection of the required acid composition is carried out without sufficient scientific and methodological substantiation. Particularly, when choosing an acid composition the mineralogy of the target interval is not taken into account. Also, an important factor is the previously undertaken activities in the wells, such as fracking jobs, as the acid resistance of the proppant must also be taken into account. All types of proppant are generally chemically stable and do not react with fracturing or formation fluids. However, some types of acids under formation conditions can damage proppant integrity and negatively affect fracture conductivity. All these factors need to be considered when choosing an acidic composition, planning the wellwork as a whole.

Keywords: Conglomerate deposits; acid treatment in terrigenous reservoirs; mineral composition of porous media; effect of acid compositions on proppant.

References

1. Davletov, Z.R., Pakhomov, M.D., Murzataeva, M.K., et al. (2012). Selection of optimum acid composition for successful treatment of bottomhole zone of the mudded-off terrigenous reservoir based on mineral composition data. Moscow: Gubkin Russian State Oil and Gas University.
2. Oblezov, A.V., Musabirov, M.H. (2017). Selection of optimal acid compositions for stimulation of terrigenous and carbonate reservoirs productivity of the main fields of NGDU «Bavlyneft», PJSC «Tatneft». http://www.tatnipi.ru/ upload/sms/2017/bur/007.pdf
3. Assem, A.I. & Nasr-El-Din, H.A. (2017). Interactions between different acids and bauxitic-based ceramic proppants used in gravel-packed and fractured wells. Journal of Petroleum Science and Engineering, 158, 441-453.
4. Sakulin, A.V., Skurikhin, V.V., & Fedorova, O.S. (2013). Impact of acid treatment upon the properties of proppant. Neft. Gaz. Novatsii, 7(174), 78-80.
5. Cheung, S.K. (1988). Effects of acids on gravels and proppants. SPE-13842-PA. SPE Production Engineering, 3(2), 201-204.

Oil sludge is a complex organic mixture of hydrocarbon and non-hydrocarbon parts. In present work the elemental composition of the oil refinery sludge was studied by the modern analysis methods - chromatography, infrared and X-ray fluorescence. The mixture of oil sludge mainly composed of hydrocarbon part (80%), gum (40%), paraffinic-naphthenic (18%) and heavy aromatic hydrocarbons (16%). The results were confirmed by the spectra. It was determined, that the part of non-hydrocarbon oil sludge includes heteroatoms (O, S, N, P), as well as metals (Al, Ca, Fe, Mg, K, Ba, Cu, Zn). X-ray fluorescence analysis method confirmed the results of the statistical processing.

Keywords: Oil sludge; functional groups; elemental composition; X-ray fluorescence analysis; spectrum; chromatography.

References

1. Popov, O.G., Posadov, I.A., Rozental', D.A., Kornilova, L.A. (1984). Himicheskij sostav gudronov smolistyh neftej. Neftehimija, 24(3), 319-325.
2. Elektorowicz, M. & Habibi, S. (2005). Sustainable waste management: recovery of fuels from petroleum sludge. Canadian Journal of Civil Engineering, 32(1), 164-169.
3. Posadov, I.A., Popov, O.G., Rozental', D.A. i dr. (1986). Himicheskij sostav ostatochnyh frakcij Timano-Pecherskih neftej. Neftehimija, 7(3), 293-303.
4. Mazlova, E.A. & Meshcheryakov, S.V. (1999). Ecological characteristics of oil sludges. Chemistry and Technology of Fuels and Oils, 35(1), 49-53.
5. R a b i n o v i c h , М . D . , K o j a n o v , S . L . ( 2 0 0 4 ) . P l a n t f o r p r o c e s s i n g o i l s l u d g e g e n e r a t e d i n t h e oil tank cars with oil transportation. R U P a t e n t 42823.
6. Shie, J.L., Chang, С.С., Chen, Y.-H., et al. (2000). Resources recovery of oil sludge by pyrolysis: kinetics study. Journal of Chemical Technology and Biotechnology, 75(6), 443-450.
7. Ramaswamy, B., Kar, D.D., De, S. (2007). A study on recovery of oil from sludge containing oil using froth flotation. Journal of Environmental Management, 85(1), 150-154.
8. Taiwo, E.A. & Otolorin, J.A. (2009). Oil recovery from petroleum sludge by solvent extraction. Petroleum Science and Technology, 27(8), 836-844.
9. Vladimirov, V.S., Korsun, D.S., Karpukhin, I.A., Moizis, S.E. (2005). Processing and utilization of tank-type oil sludge. Moscow: Nauka.
10. Kolodyazhny, A.V., Kovalchuk, T.N., Korovin, Yu.V., Antonovich, V.P. (2006). Determination of trace element composition of oils and oil products. Methods and Objects of Chemical Analysis, 1(2), 90-104.
11. Pavlova, A. & Ivanova, R. (2003). Determination of petroleum hydrocarbons and polycyclic aromatic hydrocarbons in sludge from wastewater treatment basins. Journal of Environmental Monitoring, 5(2), 319-323.
12. Thomson, J.S. et al. Characterization of high-boiling sludge waxes from underground crude oil storage reservoirs. Analytical Chemistry of Heavy Oils/Resids Symposium. USA: Dallas, TX.
13. Kondrasheva, N.K., Rudko, V.A., Povarov, V.G. (2017). Determination of sulfur and trace elements in petroleum coke by X-ray fluorescent spectrometry. Coke and Chemistry, 60(6), 147-153.
14. Nurabaev, B.K. (2010). Issledovanie sostava nefteshlamov. Vestnik KazNTU im. K.I. Satpaeva, 4(80), 229-230.
15. Chernykh, O.V., Purygin, P.P., Kotov, S.V., et al. (2009). Opportunity of road bitumen reception by oil slimes oxidation. Izvestia of Samara Scientific Center of the Russian Academy of Sciences, 11(1-2), 234-237.
16. Silverstein, R.M., Webster, F.X., Kiemle, D.J. (2005). Spectrometric identification of organic compounds. New York: John Wiley and Sons.
17. Badikova, A.D., Kudasheva, F.Kh., Teptereva, G.A., et al. (2015). The possibilities of x-ray fluorescence spectral method in the determination of the elemental composition of core material. Bulletin of Bashkir University, 20(4), 1189-1192.
18. Badikova, A.D., Kudasheva, F.Kh., Yalalova, R.A., et al. Spectral methods of analysis capabilities for investigation of oil sludges composition. Proceedings of Universities. Applied Chemistry and Biotechnology, 7(2), 128-134.

The article deals with the problems of ensuring the safe operation of wells in conditions of intense sand ingress. The results of the analysis of deposition of solids contained in the reservoir fluids flow during movement through an infield pipeline are presented. It was found that most of the solids settle in the infield pipeline, prior to the point of collection and treatment of products. A device for sand settling has been developed to clean the produced oil from sand particles and mechanical impurities directly in the infield pipeline prior to the oil collection and treatment point. The proposed device ensures the continuity during fluid flow, and provides conditions for multiple separations, as well as for finer and more complete and better cleaning of the fluid entering the device from larger, medium and small sand particles and solids. The results of field tests of the device for sand settling confirmed its high performance.

Keywords: Sand; Oil; Pipe; Plates; Sand settler; Filters; Gate valves.

References

1. Iskenderov, D.A., Ibadov, G.G., & Tolepbergenov, Y.K. (2017). New gravel pack for wells. SOCAR Proceedings, 4, 52-56. http://dx.doi.org/10.5510/OGP20170400330
2. Shaidakov, V.V., Urmancheev, S.F., Poletaeva, O.Yu., et al. (2009). Magnetodynamic coagulation of mechanical impurities in a liquid flow. Oilfield engineering, 9, 53-55.
3. Shaidakov, V.V., Musayev, M.V., Chernova, K.V., et al. (2008). Device for coagulation of ferromagnetic liquid and gas particles. RU Patent 69859.
4. Aliyev, R. A., Belousov, V. D., Nemudrov, A. G., et al. (1988). Pipeline transportation of oil and gas. Textbook for universities. Moscow: Nedra.
5. Laptev, A.G., Farakhov, M.I. (2006). Separation of heterogeneous systems in packing machines. Kazan: KSPEU.
6. Sharifullin, A.M. (2015). Method for removal of sand and mechanical impurities in flow of oil, water and gas. RU Patent 2540131.
7. Pilov, P.I. (2010). Gravitational separation o f m i n e r a l s . D n e p r o p e t r o v s k : N a t i o n a l M i n i n g University.
8. Kalitsun, V.I., Kedrov, V.S., Laskov, Yu. M., Safonov, P.V. (1980). Hydraulics, water supply and drainage. Moscow: Stroizdat.
9. Faber, T.E. (1997). Fluid dynamics for physicists. Cambridge University Press.
10. Gurevich, M. I. (1979). The theory of jets in an ideal fluid. Moscow: Nauka.
11. Endryus, D.S. i dr. (2015). Vybor protivopesochnyh fil'trov. Neftegazovoe obozrenie. T. 27, 2, 76-85.

The article presents the calculations of the offshore jack-up drill rig (JDR) designed for drilling and abandonment of oil and gas wells, to determine the safety factor for shear, nonpenetration of the pillars at JDR stand, as well as to determine stock freeboard at the removal from the drilling point.

Keywords: Floating drill rigs; offshore oil and gas installations; ballast pumps; cylindrical or quadrangular lattice structures. 

References

1. Vyakhirev, R.I., Nikitin, B.A., Mirzoev, D.A. (1999). Arrangement and development of offshore oil and gas fields. Moscow: Academy of Mining Sciences.
2. Borodavkin, P.P. (2006). Offshore oil and gas facilities. Part 1. Design. Moscow: OOO «NedraBiznestsentr».
3. Suleymanov, A.B., Kuliyev, R.P., Sarkisov, E.I. (1986). Development of offshore oil and gas fields. Moscow: Nedra.
4. RD 51.74–83. Metodika podyema iz grunta.
5. RD 51.36–81. Metodika rascheta glubiny zadavlivaniya v grunt.
6. SNiP 2.02.03–85. Svayniye fundamenty.

The results of field observations and analysis of field information indicate the effects of the theoretical pump performance on production performance. With an increase in theoretical productivity, the flow rate of the liquid will increase, as well as the amount of mechanical impurities. To solve this problem, a regular system analysis is needed, on the basis of which it will be possible to evaluate the productive efficiency of the pump and obtain reliable forecasts of the considered indicators. All studies and calculations were carried out on the basis of the actual ranges of changes in the values of the production data of the Absheronneft management. The simplicity and the absence of the need for additional field activities, makes it possible to apply the above approach to solving the problems of efficient use of the well stock operated by deep-well sucker-rod pumps in long-developed fields.

Keywords: Productivity; well; sand; water cut; pump; repair; tilt angle

References

1. Suleimanov, B.A. (2011). Sand plug washing with gassy fluids. SOCAR Proceedings, 1, 30-36. http://dx.doi. org/10.5510/OGP20110100053
2. Gazarov, A.G., Epshtejn, A.R., Pchelincev, YU.V. (2002). Osobennosti ekspluatacii ustanovok SSHN v skvazhinah s oslozhnennymi geologotekhnicheskimi usloviyami. A v t o m a t i z a c i y a , telemekhanizaciya i svyaz' v neftyanoj promyshlennosti, 11, 5-7.
3. Vlasov, V.V. (2003). Vliyanie peska na proizvoditel'nost' shtangovogo nasosa i obrazovanie peschanyh probok v skvazhinah pri otkachke mnogokomponentnoj zhidkosti. Tezisy dokladov 54-j nauchno-tekhnicheskoj konferencii studentov, aspirantov i molodyh uchenyh. Ufa: UGNTU, 207.
4. Mirzajanzadeh, A. K., Aliev, N. A., Yusifzade, Kh. B., et al. (1997). Fragments on offshore oil and gas fields development. Baku: Elm.
5. Karasev, A.I. (1962). Bases of mathematical statistics. Moscow: Rosvuzizdat.
6. Romanovsky, V. I. (1947). The use of statistics in the experimental case. Moscow-Leningrad: Gostekhizdat.

The main causes of corrosion of oilfield equipment and facilities «Neft Dashlary» and «May 28» OGPD SOCAR are identified. The main way to protect oilfield equipment is to use corrosion inhibitors. Based on the condensation products of aminoethylethanolamine and fatty acids, a universal biocide-inhibitor has been developed to prevent corrosion. By the method of gravimetric tests it have been studied the inhibitory properties of the developed new inhibitory composition against the corrosion of steel in hydrogen sulfide media of various compositions simulating formation water of oil fields, and the biocide efficiency against sulfate-reducing bacteria. The developed inhibitor is recommended for the application of corrosion protection of downhole equipment, pipelines of reservoir pressure maintenance systems and oil transportation.

Keywords: Corrsion; biocide-inhibitor; sulfate-reducing bacteria; imidazoline. 

References

1. Ashassi-Sorkhabi, Н., Shaabani. B., Seifzadeh, D. (2005). Corrosion inhibition of mild steel by some schiff base compounds in hydrochloric acid. Applied Surface Science, 239, 154-164.
2. Jiang, X., Zheng, Y.G., Ke, W. (2005). Effect of flow velocity and entrained sand on inhibition performances of two inhibitors for CO2 corrosion of N80 steel in 3% NaCl solution. Corrosion Science, 47, 2636-2658.
3. Vagapov, R.K. (2007). Vybor ingibitorov dlya antikorrozionnoj zaschity stal'nogo oborudovaniya na neftepromyslah. Korroziya: materialy, zaschita, 1, 9-13.
4. Kermani, M.B., Harrop, D. (1996). The impact of corrosion on the oil and gas industry. SPE Production Facilities, 11, 186–190.
5. Ismailov, O.D., Shabanova, Z.A., Veliev, F.G. (2018). Analiz prichin razvitiya oslozhnenij na neftegazopromyslovyh ob`ektah. Neftepererabotka i neftehimiya, 7, 49.
6. Abbasov, V.M., Mammadova, T.A., Veliyev, Kh.R., Kasamanli, Kh.H. (2015). Hydroxy- and aminoethyl imidazolines of cottonseed oil fatty acids as additives for diesel fuels. Open Journal of Synthesis Theory and Applications, 4, 33-39.
7. Ismayilov, O.D., Shabanova, Z.A., Valiyev, F.V. (2019). The development of corrosion inhibitors on the basis of nytrogen containing compounds. 5th International Turkic World Conference on Chemical Sciences and Technologies, Sakarya, Turkey, 19.
8. Ismailov, O.D., Shabanova, Z.A., Sultanov, E.F., Valiev, F.G. (2019). Development and protective properties of bactericide inhibitor hydrogen and microbiological corrosion of steel based on nitrogen-containing compounds. SOCAR Proceedings, 3, 29-33.

It is specified in the work that the equipment of oil and gas technologies operates in the wide range of temperature variation. The complex flow dynamics of hightemperature flows in the equipment designed for processing of raw hydrocarbons results in the fact that the temperature varies unevenly in the course of time and in the local zones the temperature difference can reach 200 degrees. In order to predict the equipment life it is necessary to know how the mechanical properties change due to temperature and operating time. The concept of calculating and experimental evaluation of mechanical properties' changes was developed. In order to test the calculating and experimental method we have carried out a set of studies that covers the determination of the mechanical properties of steel 10X23H18 during delivery and at different running hours in the reaction furnace. Calculating and experimental data found good agreement while determination of mechanical properties' values. Time dependencies require the introduction of an adjustment factor into the design equations. It is required for control of changes in the structure of the construction material under the operating conditions. It is necessary to carry out the labourconsuming tests connected with the metal selection from the operating facilities in order to determine the adjustment factors for different groups of steel. The authors recommend together with the preparation of reference data to improve the methods of monitoring and diagnostics of hazardous facilities.

Keywords: Reaction furnaces; stress-strain state; strength; limit state. 

References

1. Gimaev, R.N., Kuzeev, I.R., & Abyzgil’din, Yu.M. (1986). Petroleum coke. Moscow: Khimiya.
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The proposed method for determination of oil losses during its refining from mechanical impurities in centrifuges relates to the primary oil treatment in oilfields, oil processing and transportation enterprises. The method solves the problem of improving oil quality and properties before transportation and can be used to quantify oil losses while removing mechanical impurities by centrifuges. The method includes determination of the oil solids concentration, degree of refining, and the oil concentration in the sediment during separation  of solids in the process of operation of centrifuges. The method provides for increasing the reliability of determining mass (quantitative) process losses of oil at oil production enterprises.

Keywords: Process oil losses; concentration of solids in oil; oil centrifuge process oil; rate of refining; oil concentration in the wet sediment in the process of operation of centrifuges.

References

1. Мetodicheskie rekomendacii po opredeleniyu tekhnologicheskih poter' nefti pri dobyche, tekhnologicheski svyazannyh s prinyatoj skhemoj i tekhnologiej razrabotki i obustrojstva mestorozhdenij. Minenergo Rossii. 2009.
2. Metodicheskie rekomendacii po opredeleniyu tekhnologicheskih poter' nefti ih tekhnologicheskih rezervuarov. Minenergo Rossii. 2015.
3. Metodicheskie rekomendacii po opredeleniyu tekhnologicheskih poter' nefti i nefteproduktov pri transportirovke magistral'nym truboprovodnym transportom Minenergo Rossii. 2012.
4. Sokolov, V.I. (1976). Centrifugation. Moscow: Chemistry.
5. Tarantseva, K.R. (2014). Processes and apparatus of chemical technology in the environmental protection field. Moscow: NCI INFRA-M.
6. Ioffe, I.L. (1991). Design of chemical industry processes and devices. Leningrad: Chemistry.

The risks level and the decisions price оf the continental shelf resources development depend on a large number of different factors. The creation of an information system will consolidate information on the subsoil use in a single integrated database, perform a systematic filling of geological, geophysical, technological, environmental and other data obtained in the process of prospecting and exploration of hydrocarbon fields. This will ensure monitoring of the fulfillment of license obligations and production activities of the Oil and Gas Company, as well as support for various forms of reporting.

Keywords: Information support; offshore oil and gas fields; continental shelf; corporate databank.

References

1. Eremin, N.A., Kondratyuk, A.T., Eremin, Al.N. (2010). About the hydrocarbon resource base in Russian Arctic shelf. Georesources. Geoenergetics. Geopolitics, 1(1), 23.
2. Bogoyavlensky, V.I., Bogoyavlensky, I.V. (2014). Strategy, technologies and technical means of prospecting, exploration and development of offshore fields in the Arctic. Bulletin of MSTU, 17(3), 437-351.
3. Vyakhirev, R.I., Nikitin, B.A., Mirzoev, D.A. (2001). Development and upstream of offshore oil and gas fields. Moscow: Academy of Mining.
4. Kalinin, V., (2010). Digitized mining. Siberian oil, 77, 18-21.
5. Karaev, I.P., Mirzoev, F.D., Arkhipova, O.L. (2015). Methodology for developing the conceptual development of oil and gas fields of the Arctic shelf. SOCAR Proceedings, 3, 58-65. http://dx.doi.org/10.5510/ OGP20150300253
6. Chernikov, B.V. (2017). Informational analysis of text-based documentation at industrial undertakings. Gorniy Zhurnal, 1, 72-75.
7. Chernikov, B.V. (2015). Formation of ontologies and data models - the stages of information systems development. Oil industry, 9, 112-115.
8. Andreeva, K., Dubrensky, D. (2013). Enterprise data warehouse - How to build it?, Jet Info, 2.