Oil emulsion characteristics as significance in efficiency forecast of oil-displacing formulations based on surfactants
https://doi.org/10.31660/0445-0108-2021-3-91-107
Abstract
Enhanced oil recovery in mature fields can be implemented using chemical flooding with the addition of surfactants using surfactant-polymer (SP) or alkaline-surfactant-polymer (ASP) flooding. Chemical flooding design is implemented taking into account reservoir conditions and composition of reservoir fluids. The surfactant in the oil-displacing formulation allows changing the rock wettability, reducing the interfacial tension, increasing the capillary number, and forming an oil emulsion, which provides a significant increase in the efficiency of oil displacement. The article is devoted with a comprehensive study of the formed emulsion phase as a stage of laboratory selection of surfactant for SP or ASP composition. In this work, the influence of aqueous phase salinity level and the surfactant concentration in the displacing solution on the characteristics of the resulting emulsion was studied. It was shown that, according to the characteristics of the emulsion, it is possible to determine the area of optimal salinity and the range of surfactant concentrations that provide increased oil displacement. The data received show the possibility of predicting the area of effectiveness of ASP and SP formulations based on the characteristics of the resulting emulsion.
About the Authors
E. A. Turnaeva
University of Tyumen
Russian Federation
Russian Federation
Elena A. Turnaeva, Candidate of Chemistry, Head of the Chromatography and Spectroscopy Sector, Research Resource Center "Natural Resource Management and Physico-Chemical Research"
Tyumen
E. A. Sidorovskaya
University of Tyumen
Russian Federation
Russian Federation
Elizaveta A. Sidorovskaya, Engineer, Research Resource Center "Natural Resource Management and Physico-Chemical Research"
Tyumen
D. S. Adakhovskij
University of Tyumen
Russian Federation
Russian Federation
Denis S. Adakhovskij, Postgraduate at the Department of Organic and Ecological Chemistry
Tyumen
E. V. Kikireva
University of Tyumen
Russian Federation
Russian Federation
Ekaterina V. Kikireva, Engineer, Research Resource Center "Natural Resource Management and Physico-Chemical Research"
Tyumen
N. Yu. Tret'yakov
University of Tyumen
Russian Federation
Russian Federation
Nikolai Yu. Tret'yakov, Candidate of Chemistry, Director of Research Resource Center "Natural Resource Management and Physico-Chemical Research", Professor at the Department of Organic and Ecological Chemistry
Tyumen
I. N. Koltsov
Gazpromneft — Technological Partnerships LLC
Russian Federation
Russian Federation
Igor N. Koltsov, Expert of EOR Technology Office
St. Petersburg
S. S. Volkova
University of Tyumen
Russian Federation
Russian Federation
Svetlana S. Volkova, Candidate of Chemistry, Deputy Director of Research Resource Center "Natural Resource Management and Physico-Chemical Research, Professor at the Department of Organic and Ecological Chemistry
Tyumen
A. A. Groman
Gazpromneft — Technological Partnerships LLC
Russian Federation
Russian Federation
Andrey A. Groman, Head of EOR Technology Office
St. Petersburg
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Review
For citations:
Turnaeva E.A., Sidorovskaya E.A., Adakhovskij D.S., Kikireva E.V., Tret'yakov N.Yu., Koltsov I.N., Volkova S.S., Groman A.A. Oil emulsion characteristics as significance in efficiency forecast of oil-displacing formulations based on surfactants. Oil and Gas Studies. 2021;(3):91-107. (In Russ.) https://doi.org/10.31660/0445-0108-2021-3-91-107
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