The article is devoted to a new task of pumping optimization for two oils with different viscosities by formation of two parties. These parties are two mixtures from the initial oils in different proportions, which are pumped sequentially through one technological section of the main oil pipeline. Mentioned, that it is necessary to calculate change in the pumping flow rate when the viscosity of the pumped product changes. With a set of assumptions, it was proved that in practice the solution of the problem comes down to only two options: pumping oils in a single mixture or butching of the original oils without mixing with each other. There is shown еhe influence of the steepness of the change in the viscosity of a binary mixture from the mixing ratio on the result of solving the problem. The closer the viscosity of the mixture is to linear additivity, the more energy efficient it is to pump oil sequentially. A parameter is proposed for choosing one or another option, the calculation of which requires laboratory measurements of the viscosities and densities of the original oils and the viscosity of the mixture in a ratio of 1:1. Restrictions are formulated in the form of conditions for admissible mixing for the need to fulfill the planned task for pumping oils within a fixed time. Taking into account the identified limitations in the case of choosing batching, the problem is reduced to the option of pumping less viscous oil in its pure form without admixing (batch No. 1), but with partial removal of part of the oil mass from it for mixing with more viscous oil and forming batch No. 2. As a result, a methodology has been developed for determining the optimal mix for pumping two oils with different viscosities through one technological section of the main oil pipeline.
References
1. Prognoz nauchno-tekhnologicheskogo razvitiya otrasley toplivno-energeticheskogo kompleksa Rossii na period do 2035 goda (Forecast of scientific and technological development of the branches of the fuel and energy complex of Russia for the period up to 2035), Moscow: Publ. of Ministry of Energy of the Russian Federation, 2016.
2. Tashbulatov R.R., Karimov R.M., Valeev A.R., Mastobaev B.N., Development of a methodology for multi-dimensional optimization of energy consumption of the trunk oil pipeline system due to the formation of cargo flows of specially formed mixtures of oil from various fields (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2020, no. 6, pp. 98–103, DOI: 10.24887/0028-2448-2020-6-98-103
3. Karimov R.M., Tashbulatov R.R., Mastobaev B.N., Increasing energy-efficiency of pipeline transportation by the way of optimal flows distribution and compounding of rheologically complicated kinds of oils (In Russ.), Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2017, no. 3, pp. 13–18.
4. Tashbulatov R.R., Karimov R.M., Valeev A.R., Mastobaev B.N., Nodal rheological task of oil mixing for optimal distribution of flows in branched pipeline network (In Russ.), Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2018, no 5, pp. 532–539.
5. Lyapin A.Yu., Bakanov A.V., Astakhov A.V., Assessment of the impact of increased intake of Yarega oil on the quality of freight traffics in the system of main oil pipelines (In Russ.), Nauka i tehnologii truboprovodnogo transporta nefti i nefteproduktov = Science & Technologies: Oil and Oil Products Pipeline Transportation, 2022, V. 12, no. 1, pp. 87–93, DOI: 10.28999/2541-9595-2022-12-1-87-93
6. Kutukov S.E., Bazhaykin S.G., Gol'yanov A.I., Improving the efficiency of batching by optimization of the oil mixture composition (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 1, pp. 88–91, DOI: 10.24887/0028-2448-2018-1-88-91
7. Lur'e M.V., Mastobaev B.N., Revel'-Muroz P.A., Soshchenko A.E., Proektirovanie ekspluatatsiya nefteprovodov (Design and operation of oil pipelines), Moscow: Nedra Publ., 2019, 432 p.
8. Tugunov P.I., Novoselov V.F., Korshak A.A. et al., Tipovye raschety pri proektirovanii i ekspluatatsiy neftebaz i nefteprovodov (Typical calculations in the design and operation of tank farms and oil pipelines), Ufa: Dizain-PoligrafServis Publ., 2002, 658 p.
9. Korshak A.A., Nechval' A.M., Proektirovanie i ekspluatatsiya gazonefteprovodov (Design and operation of gas and oil pipelines), St. Petersburg: Nedra Publ., 2008, 488 p.
10. Certificate of registration of the computer program. Energosberegayushchaya metodika perekachki neftey razlichnykh mestorozhdeniy po razvetvlennoy sisteme magistral'nykh nefteprovodov (Energy-saving technique for pumping oils from various fields through an extensive system of main oil pipelines), Authors: Tashbulatov R.R., Karimov R.M.
11. Tashbulatov R.R., Karimov R.M., Mastobaev B.N., Valeev A.R., Analysis of changing viscosity-temperature dependence in binary mixture of oils (In Russ.), Transport i khranenie nefteproduktov i uglevodorodnogo syr'ya, 2018, no. 2, pp. 5–9, DOI: 10.24411/0131-4270-2018-10201
12. Tashbulatov R.R., Karimov R.M., Sravnitel'nyy analiz tochnosti primenyaemykh modeley vyazkostno-temperaturnykh zavisimostey pri reshenii zadach truboprovodnogo transporta (Comparative analysis of the accuracy of the applied models of viscosity-temperature dependences in solving problems of pipeline transport), Collected papers “Truboprovodnyy transport – 2017” (Pipeline transport - 2017), Proceedings of XII International educational-scientific-practical conference, Ufa: Publ. of USPTU, 2017, pp. 189–191.
13. Tashbulatov R.R., Karimov R.M., Prognozirovanie reologicheskikh svoystv smesey pri sovmestnom truboprovodnom transporte neftey (Prediction of rheological properties of mixtures in the joint pipeline transport of oils), Collected papers “Truboprovodnyy transport uglevodorodov” (Pipeline transport of hydrocarbons), Proceedings of All-Russian scientific and practical conference, Omsk: Publ. of OmSTU, 2017, pp. 88–91.
14. Tashbulatov R.R., Prognozirovanie vyazkostno-temperaturnykh kharakteristik techeniya smesey pri sovmestnoy transportirovke razlichnykh neftey v sisteme magistral'nykh nefteprovodov (Prediction of the viscous-temperature characteristics of the flow of mixtures during the joint transportation of various oils in the system of main oil pipelines): thesis of candidate of technical science, Ufa, 2019.
