A.M. Nasyrov, S.A. Krasnoperova, Yu. G. Epifanov, A.N. Vanchurin
DOI: https://doi.org/10.25689/NP.2022.4.183-195
Abstract
In the late stage of field development, there are significant changes in the productivity of wells, there is a differentiation of energy potential and hydraulic conductivity between interlayers. The main changes are in deepening the differentiation of the perforated zone of the reservoir in terms of the productivity of interlayers in terms of energy and reservoir characteristics. Those intervals of the reservoir that were not initially involved in development due to low permeability and were not brought in as a result of production stimulation measures further deteriorate the reservoir properties, but retain their energy potential. This leads to a gradual breakthrough of formation water through the most highly permeable intervals of the formation with an increase in fluid flow rate. The ratio of the liquid flow rate after water breakthrough to the initial flow rate of wells will be an order of magnitude higher in the production of high-viscosity oil. Often, circulation is lost during technological flushing of such wells, and the shortage of oil during flushing increases. There are conditions for oil and gas water showings due to the difference in the state of development of layers.
A mechanical device is proposed that allows to prevent the well fluid from getting back into the formation during technological flushing and killing of the well, to ensure the operation of the oil formation in a hydrophobic environment, as well as to improve safety during well workovers.
References
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Authors
A.M. Nasyrov, Candidate of Technical Sciences, Associate Professor, Professor of the chair of development and exploitation of oil and gas fields, Oil and Gas Institute named after M.S. Gutseriev, Udmurt state University
1/7 Universitetskaya st., Izhevsk, 426034, Russian Federation
E-mail: amdakh-nasyrov@rambler.ru
S.A. Krasnoperova, Candidate of Biological Sciences, Associate Professor, Department of Oil and Gas Geology, Udmurt state University
1/7 Universitetskaya st., Izhevsk, 426034, Russian Federation
E-mail: krasnoperova_sve@mail.ru
Yu.G. Epifanov, post-graduate student of the UdSU, senior lecturer of the chair of development and exploitation of oil and gas field, Oil and Gas Institute named after M.S. Gutseriev, Udmurt state University
1/7 Universitetskaya st., Izhevsk, 426034, Russian Federation
E-mail: epifanov_urgen@mail.ru
A.N. Vanchurin, Candidate of Technical Sciences, Associate Professor of the chair of development and exploitation of oil and gas fields, Oil and Gas Institute named after M.S. Gutseriev, Udmurt state University
1/7 Universitetskaya st., Izhevsk, 426034, Russian Federation
E-mail: grigino@mail.ru
For citation:
A.M. Nasyrov, S.A. Krasnoperova, Yu. G. Epifanov, A.N. Vanchurin Mekhanicheskiy metod zashchity ot kol'matatsii i gidrofilizatsii prizaboynoy zony plasta [Mechanical method of protection against colmatation and hydrophilization of the boreholehouse formation zone]. Neftyanaya Provintsiya, No. 4(32), 2022. pp. 183-195. DOI https://doi.org/10.25689/NP.2022.4.183-195. EDN ETBGSN (in Russian)