ارزیابی تغییر ترشدگی و جذب نانوذرات سیلیکای اصلاح‌شده با پلیمر برای ازدیاد برداشت نفت

نوع مقاله : پژوهشی

نویسندگان

تهران، مرکز تحقیقات علوم و مهندسی مواد، صندوق پستی 1135-37195

چکیده

فرضیه: تغییر ترشدن سنگ از آب‌گریز به آب‌دوست، تغییر ترشدگی نامیده می‌شود. این موضوع، عامل مهمی در ازدیاد برداشت نفت است. به‌دلیل خواص منحصربه‌فرد، نانوذرات توجه زیادی را در زمینه ازدیاد برداشت نفت جلب کرده‌اند. با وجود نتایج امیدوارکننده، چالش‌های اصلی استفاده از نانوذرات به پایداری کلوئیدی و جذب ضعیف نانوسیال‌ها در شرایط سخت مخزن مربوط است. در سال‌های اخیر نانوذرات پیوند‌شده به پلیمر به‌عنوان موادی امیدبخش برای ازدیاد برداشت نفت درنظر گرفته شده‌اند.
روش‌ها: در این مطالعه، ترشدگی و جذب نانوذرات پیوندشده به پلیمر شامل نانوذرات سیلیس اصلاح‌شده با پلی‌اتیلن گلیکول متیل اتر (میانگین وزن مولکولی 2000) و نانوذرات سیلیس اصلاح‌شده با دو پلیمر پلی‌اتیلن گلیکول متیل اتر (میانگین وزن مولکولی 2000 و 5000) و زنجیرهای پروپیل بررسی شده است. طیف‌نمایی زیر‌قرمز تبدیل فوریه (FTIR)  و آزمون گرماوزن‌سنجی (TGA) برای بررسی پیوند شیمیایی و مقدار پلیمر روی سطح سیلیس به‌کار گرفته شد. میکروسکوپی الکترونی پویشی (SEM) و طیف‌نمایی پراش انرژی پرتو X و(EDS)، اندازه‌گیری زاویه تماس با آب و طیف‌نمایی مرئی-فرابنفش (UV-Vis) نیز برای مطالعه شکل‌شناسی، ترکیب درصد مواد، ترشدگی و جذب زیرلایه‌ها استفاده شدند.
یافته‌ها: بهترین عملکرد برای نانوذرات سیلیس اصلاح‌شده با پلی‌اتیلن گلیکول متیل اتر (میانگین وزن مولکولی 5000) و زنجیر‌های پروپیل در غلظت  1000ppm و محدوده شوری  40000-20000ppm به‌دست آمد. این مطالعه نشان داد، نانوذرات سیلیس پیوندشده به پلیمرهای مختلف را می‌توان به‌عنوان رهکاری مؤثر و نو برای ازدیاد برداشت نفت درنظر گرفت.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of Polymer Wettability Alteration and Adsorption of Modified Silica Nanoparticles for Enhanced Oil Recovery

نویسندگان [English]

  • Hamid Daneshmand
  • Masoud Araghchi
  • Meysam Karimi
  • Masoud Asgary
Materials Science and Engineering Research Center, P.O. Box 37195-1135,, Tehran, Iran
چکیده [English]

Hypothesis: The change in the wetting of rock from hydrophobic to hydrophilic is named "wettability alteration". This is an important factor for enhanced oil recovery (EOR). Because of their unique properties, nanoparticles have attracted much attention for enhanced oil recovery. Despite promising results, the main challenges of using nanoparticles are related to colloidal stability and poor absorption of nanofluids under harsh conditions. In recent years, polymer-grafted nanoparticles have been considered as emerging materials for enhanced oil recovery.
Methods: In this study, wettability and absorption of polymer-grafted nanoparticles including silica nanoparticles modified by polyethylene glycol methyl ether (mean molecular weight 2000), silica nanoparticles modified by two polymers: polyethylene glycol methyl ether (mean molecular weights 2000 and 5000) and propyl chains are investigated. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were used to investigate the chemical bonding and polymer content on the silica surface. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), water contact angle measurement, and UV-Vis spectroscopy were also used to study morphology, material composition, wettability, and absorption of the substrate, respectively.
Findings: Best performance for silica nanoparticles modified by polyethylene glycol methyl ether (average molecular weight 5000) and propyl chains at 1000 ppm concentration and salinity range 20000-40000 ppm was obtained. This study shows that silica nanoparticles bonded to different polymers can be considered as an effective and novel approach for enhanced oil recovery.

کلیدواژه‌ها [English]

  • wettability
  • adsorption
  • silica nanoparticle
  • surface modification
  • enhanced oil recovery

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مجله علوم و تکنولوژی پلیمر
دوره 33، شماره 3 - شماره پیاپی 167
مرداد و شهریور 1399
صفحه 272-285

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