The possibilities of increasing the operating efficiency of oilfield exploitation with a well-developed oil gathering system complicated by highly viscous emulsions due to targeted use of the demulsifier at certain points in the pipeline system to reduce the viscosity of the transported oil-water emulsion during the course of demulsification are discussed and shown. By the example of the redistribution of the dosing points of the demulsifier, the necessity and sufficiency of supplying the reagent strictly in certain parts of the system is shown. The question of the local effect of "re-dispersion" due to overdose of the demulsifier during the transportation of oil-water emulsion is considered. It was noted that when analyzing oil gathering systems, it is necessary to carry out comprehensive measures to establish the causes of increased pressure, which are the result of various complicating factors (asphalt-resin-paraffin deposits, scaling, gas hydrates, oil-water emulsions, etc.), and technological reasons - excess flow, changes in fluid viscosity, etc. The main technological effect of the fight against highly viscous emulsions is to reduce the linear pressure in the system of oil-gathering pipelines, which not only positively affects the integrity of the system, but also leads to a significant economic effect, which consists of several components. First, there is a reduction in the total energy consumption for transporting the produced fluid; secondly, reduction of electricity consumption by sucker-rod downhole pumping equipment; and, thirdly, the most significant contribution is made by the possibility of increasing the volume of oil produced during the operation of wells with the help of electrical centrifugal pumping equipment. This approach is recommended for introduction in mature fields that are at a late stage of development, having a developed oil gathering system and having various types of complications that reduce throughput.
References
1. Borkhovich S.Yu., Kholmogorova D.K., Vasil'eva E.A., Yatskovskaya A.S., Termopolymeric techniques of development of complex structure fields with viscous and high-viscosity oil in carbon-bearing reservoirs (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo = Perm Journal of Petroleum and Mining Engineering, 2012, V. 11, no. 2, pp. 95–104.
2. Gidravlicheskiy raschet truboprovodov, transportiruyushchikh gazozhidkostnye smesi (Hydraulic calculation of pipelines transporting gas-liquid mixtures)b Moscow: Publ. of VNIIGaz, 1985.
3. Metodika gidravlicheskogo rascheta truboprovodov dlya transporta gazozhidkostnykh smesey (The method of hydraulic calculation of pipelines for the transport of gas-liquid mixtures), Samara: Publ. of Giprovostokneft', 1970.
4. Medvedev V.F., Sbor i podgotovka neustoychivykh emul'siĭ na promyslakh (Gathering and preparation of unstable emulsions in the fields), Moscow: Nedra Publ., 1987, 144 p.
5. Dunyushkin I.I., Mishchenko I.T., Eliseeva E.I., Raschety fiziko-khimicheskikh svoystv plastovoy i promyslovoy nefti i vody (Calculations of physicochemical properties of reservoir and field oil and water), Moscow: Neft' i gaz Publ., 2004, 448 p.
6. Tronov V.P., Promyslovaya podgotovka nefti (Field oil treatment), Kazan': Fen Publ., 2000, 416 p.
7. Markin A.N., Nizamov R.E., Sukhoverkhov S.V., Neftepromyslovaya khimiya: prakticheskoe rukovodstvo (Oilfield chemistry: a practical guide), Vladivostok: Dal'nauka Publ., 2011, 294 p.
8. Avanesyan V.G., Reologicheskie osobennosti emul'sionnykh smesey (Rheological features of emulsion mixtures), Moscow: Nedra Publ., 1980, 116 p.
9. Baykov N.M., Kolesnikov B.V., Chelpanov P.I., Sbor, transport i podgotovka nefti (Oil gathering, transportation and treatment), Moscow: Nedra Publ., 1975, 317 p.
10. Usova L.N., Minnigalimov R.Z., Safonov V.E., Golubev M.V., The rationale for the selection of rational supply points of the demulsifier in the produced liquid during the directional discharge of water (In Russ.), Neftegazovoe delo, 2007, no. 1, URL: http://ogbus.ru/files/ogbus/authors/Usova/Usova_2.pdf
11. Lutoshkin G.S., Sbor i podgotovka nefti, gaza i vody k transportu (Collection and processing of oil, gas and water), Moscow: Nedra Publ., 1979, 204 p.
