RESEARCH ARTICLE


Potential of Polysorbate20 Surfactant for Enhanced Oil Recovery



Wan Rosli Wan Sulaiman*, 1, 2, Euy Soo Lee1
1 Department of Chemical and Biochemical Engineering, Dongguk University, Seoul, Korea;
2 Petroleum Engineering Department, Faculty of Petroleum and Renewable Energy Engineering, Universiti Teknologi Malaysia, Malaysia


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© 2012 Rosli Wan Sulaiman et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: * Address correspondence to this author at the Department of Chemical and Biochemical Engineering, Dongguk University, 3-26, Pil-Dong, Chung-gu, Seoul, 100-715 Korea; Tel: +82-10-8320-2711; Fax: +82-2-2266-1848; E-mail: r-wan@petroleum.utm.my


Abstract

Surfactant for enhanced oil recovery (EOR) has been applied for many years, particularly in the 1970’s and 1980’s when the technology was put on a sound scientific basis. Unfortunately, the economic reality of the process performance in field trials has precluded widespread deployment of this technology. Many surfactants have been evaluated for their ability to recover incremental oil and this study is focusing on Polysorbate20 as a candidate for this EOR application. This laboratory study aims to determine the characteristics of Polysorbate20 surfactant, in particular for its capabilities to create low interfacial tensions (IFT) with n-alkane hydrocarbons. Certain formulated surfactant and cosolvent exhibit low interfacial tension (IFT) values of 0.01 dyne/cm or less versus n-octane. This surfactant was tested for EOR using coreflood tests on Berea sandstones. Laboratory tests had confirmed that the useful property which is to reduce the IFT by using Polysorbate20 formulations can be largely independent of both salinity and temperature. Preliminary studies also suggest Polysorbate20 has only modest adsorption between 0.10 to 0.11 mg/g onto crushed sandstone and between 15.33 to 17.62 mg/g onto kaolinite clay.

Keywords: Enhanced oil recovery, surfactant, Polysorbate20, interfacial tension, kaolinite clay.