The oil industry has used many enhanced oil recovery (EOR) strategies to increase crude oil production from reservoirs, particularly as production begins to fall. With a significant quantity of hydrocarbon reserves still existing in the reservoirs, improved oil recovery techniques have the potential to increase oil production, with wettability alteration playing a significant role. To date, there has been no comprehensive investigation of wettability in Brunei's sandstone reservoir. The goal of this research is to determine wettability by contact angle measurement and data mining approaches based on the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) algorithm. Contact angle tests were conducted on thirty sandstone samples, yielding an average contact angle of 89.2°, suggesting intermediate wettability. Data analysis involves evaluating various enhanced oil recovery methods by conducting an extensive literature review and examining case studies. The brine used in the study was a 3% NaCl solution with a density of 1.05 g/cm³ and viscosity of 1.5 cp, and the synthetic oil had a density of 0.85 g/cm³ and viscosity of 15 cp. The TOPSIS algorithm identified cationic surfactant flooding as the most suitable option for modifying wettability to increase oil recovery. The results emphasize the efficacy of cationic surfactants in changing wettability and enhancing oil recovery in intermediate-wet sandstone reservoirs.
Ja’afar et al. (Thu,) studied this question.
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