نوع مقاله : مقاله پژوهشی
نویسندگان
1 Chemistry & Chemical Engineering Research Center of Iran (CCERCI), Pajohesh Blvd,17th Km of Tehran-Karaj Highway, Tehran, Iran
2 تحقیق و توسعه شرکت بسپارش یکتا نوآور ایرانیان، تهران، ایران
3 دانشگاه تربیت مدرس
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The research examines the effectiveness of di-acetylated acid sophorolipid biosurfactant in improving oil recovery. The investigation includes various experiments such as oil displacement, surface and interfacial tension, wettability alteration, and flooding experiments in both homogeneous and heterogeneous micromodels. Initially, the focus is on assessing the biosurfactant's ability to displace crude oil. Surface and interfacial tension measurements were carried out to study the impact of salinity on IFT reduction. The results showed that a 5000 ppm di-acetylated acid sophorolipid reduced the surface tension of water from 74 mN/m to 33.41 mN/m. Furthermore, a 5000 ppm di-acetylated acid sophorolipid in 80,000 ppm salinity water reduced the IFT from 37.42 mN/m to 9.14 mN/m. A wettability alteration test was also conducted to evaluate the di-acetylated acid sophorolipid solution's ability to change carbonate rock from oil-wet to water-wet. The test measured the contact angle of an oil droplet on the rock surface and indicated a successful alteration in wettability from oil-wet to water-wet. Finally, micromodel flooding experiments were conducted to assess the ability of di-acetylated acid sophorolipid biosurfactant to enhance oil recovery. The optimal concentration and salinity of the di-acetylated acid sophorolipid solution were determined for each micromodel. The biosurfactant solution was then injected into the micromodels, resulting in oil recoveries of 78% and 71% for the homogeneous and heterogeneous patterns, respectively.
کلیدواژهها [English]
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