Publication Date: 2023/06/13
Abstract: In last years, there has been a growing interest in the effect of reducing salinity of injected water in oil recovery. Numerous studies have demonstrated that low salinity waterflooding is a promising method that can lead to a significant reduction in residual oil saturation compared to traditional water flooding. The mechanisms behind improved oil recovery by low salinity water flooding are not fully understood, but many researchers have claimed wettability alteration. Investigation has been carried out to characterize the polymers and surfactant solutions in terms of their ability to improve oil recovery in their aqueous solutions. A series of flooding experiments have been conducted to find the additional recovery using polymer and surfactant slug. In this research, the effect of low salinity water flooding on improving oil recovery is investigated in six Dolomite cores. In addition a combined low salinity and polymer-surfactantslugs injection were conducted in tertiary mode to determine and optimize its effectiveness in increasing oil production. The tertiary low salinity surfactant-polymer slugs injection showed an increase in oil recovery with increasing size of surfactant slug injected at constant surfactant concentration. The wettability of the cores had impact on the efficiency of the slugs injected on oil recovery.
Keywords: (Polymer, surfactant, Natural polymer, water flooding Abelmoschusesculentus (Okro), HPAM, C12TAB).
DOI: https://doi.org/10.5281/zenodo.8130375
PDF: https://ijirst.demo4.arinfotech.co/assets/upload/files/IJISRT23MAY1818.pdf
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