Alkaline surfactant enhanced oil recovery with special emphasis on chemical adsorption onto the porous media
Joyshree Barman, Subrata Borgohain Gogoi, Fathi Boukadi and Jayakumar Viswanathan
Dibrugarh University, India
University of Louisiana, USA
Universiti Teknologi Petronas, Malaysia
: Expert Opin Environ Biol
In alkaline surfactant enhanced oil recovery (ASEOR) an alkali and surfactant/surfactants are used to recover the residual oil that remains after secondary brine flooding. The alkali, which is Sodium Hydroxide (NaOH) in this case reacts with acidic components in the crude oil to form surface-active substances. A GC-MS spectrum of Upper Assam crude oil reveals the presence of carboxylic acid groups leading to in-situ formation of surfactants which in turn decreases the interfacial tension (IFT) between the oleic and aqueous phases for better oil recovery. While the anionic surfactants used were Black Liquor (BL) and Sodium Dodecyl Sulphate (SDS). The Critical Micellar concentration (CMC) of BL and SDS one at a time was added to NaOH to enhance the effectiveness of NaOH in further decreasing the IFT of the Alkali-Surfactant (AS) slugs. The paper also make an attempt to study the adsorptive nature of the AS slugs. The best fit adsorption isotherm was derived by using SciDAVis scaled Levenberg - Marquaradt algorithm regression co-efficient.
Joyshree Barman has completed her BTech in the year 2013 from the Dibrugarh University Institute of Engineering and Technology, Assam, India and MTech from Department of Petroleum Technology, Dibrugarh University, Assam in the year 2016. Recently, she has published two papers and one book chapter. She is presently working as a Junior Research Fellow (JRF) of the University Grants Commission sponsored by Indo-US 21st Century Knowledge Initiative Programme Project No. 194-1/2009., entitled, “Foam –assisted CO2 flooding for the depleted reservoir of Upper Assam Basin and candidate reservoirs in Louisiana”, Department of Petroleum Technology, Dibrugarh University.