Amphiphilic polymer-coated SiO2 nanoparticle for enhanced oil recovery

سال انتشار: 1399
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 302

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شناسه ملی سند علمی:

CARSE05_119

تاریخ نمایه سازی: 17 آذر 1399

چکیده مقاله:

Wettability alteration of the oil-wet reservoir rocks to water-wet state is an important factor for enhanced oil recovery (EOR). One of the main challenges of applying nanoparticles for wettability alteration is related to the colloidal stability and poor adsorption of the nanofluids in the harsh conditions of the reservoirs. Polymer-coated nanoparticles have been proposed as a novel approach and in the present work, comparative studies were followed between polymer-coated silica nanoparticles by polyethylene glycol (Mn ~ 2000) and amphiphilic polymer-coated silica nanoparticles by polyethylene glycol (Mn ~ 2000 or 5000) and propyl chains to determine wettability alteration and adsorption of these modified nanoparticles on simulated porous media by the glass beads and oil-wet glass beads (modified glass beads by palmitic acid). The chemical bonding between the surface of silica and polymer was confirmed by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and Energy Dispersive X-Ray Spectroscopy (EDS). Water contact angle and UV–Vis adsorption measurements showed which the efficiency of amphiphilic polymer-coated nanoparticles depends to wettability state of glass and it was improved significantly by oil-wet glass substrates due to the existence of the hydrophobic polymer on the surface of the nanoparticles. Moreover, effective parameters including temperature, and pH were studied. The better performance was obtained for the modified silica nanoparticles by polyethylene glycol (Mn ~ 5000) and propyl chains at 1000 ppm concentration pH 6 and in the temperature range of 25-55 °C. Our study demonstrated amphiphilic polymer-coated silica nanoparticles can be considered as a promising agent which have the potential for EOR purposes.

نویسندگان

Hamid Daneshmand

Department of Physics, University of Tehran, North Kargar Av., P.O. Box ۱۴۳۹۵-۵۴۷, Tehran, Iran

Masoud Bagheri

Shahroud University of Medical Sciences and Health Services, Hafte Tir Square, Shahroud, Iran.