کاربرد نانوسیالات حاوی نانوذرات معدنی در ازدیاد برداشت از مخازن نفت کربناته: مطالعه آزمایشگاهی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی شیمی، نفت و گاز، دانشگاه علم و صنعت ایران، تهران، ایران

چکیده

از مهم‌ترین روش‌های ازدیاد برداشت از مخازن کربناته می‌توان به تغییر ترشوندگی سنگ مخزن با پیدایش فناوری نانو که در چارچوب روش‌های ازدیاد برداشت نقش بسزایی داشته است، اشاره نمود. هدف از انجام این پروژه بهره‌گیری از نانو سیالات حاوی نانوذرات معدنی که از نظر اقتصادی به‌صرفه و سازگار بامحیط زیست است، است. به‌این‌منظور ابتدا 3 نوع نانوذره معدنی ₃اSiO₂ ،Al₂O و TiO₂ که توسط آسیاب گلوله ماهواره‌‌ای به‌روش مکانیکی، پودر در ابعاد میکرومتری به ابعاد نانومتری تبدیل شد. سپس 3 نانو سیال حاوی ₃اSiO₂ ،Al₂O و TiO₂ به‌همراه پخش‌کننده‌ها و پایدار کننده‌ها آماده شد. با انجام آزمایش زاویه تماس مشخص شد که زاویه تماس قطره نفت برروی سنگ کربناته نفت‌دوست‌شده بعد از پوشش‌دهی با نانو سیال با غلظت حداقل wt.% 01/0، از °1/132 به زاویه °1/87 تغییر یافت. سپس غلظت بهینه نانو سیال و زمان بهینه پیرسازی سنگ در نانو سیال تعیین شد که مقدار این پارامتر‌ها به‌ترتیب wt. % 01/0 و 7 روز بود. در ادامه نشان داده شد که سنگ پوشش داده‌شده با این نانو سیالات خاصیت ترشوندگی خود را به‌خوبی حفظ می‌کند. بر‌اساس آزمایش کشش بین سطحی نشان داده شد که کشش بین سطحی از mN/m 029/24 (آب و نفت) به mN/m 4 (نانو سیال و نفت) کاهش پیدا کرد. درنهایت با انجام آزمایش سیلاب‌زنی برروی مغزه‌های نفت‌دوست‌شده، بررسی‌ها نشان می‌دهد که در آزمایش سیلاب‌زنی حجم نفت استخراج شده 06/42% در حالت تزریق آب به 09/60% در حالت تزریق نانوسیال افزایش یافت. (نفت باقی‌مانده به‌ترتیب از cm³ 64/9 به cm³ 64/6 کاهش یافت) که در واقع ضریب بازیافت سیلاب‌زنی نسبت به‌حالت قبل 18% افزایش یافت.
 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Application of Mineral Nanofluids in Enhanced Oil Recovery (EOR) of Carbonate Oil Reservoirs: A Laboratory Study

نویسندگان [English]

  • Pedram Alilou
  • Hamid Reza Jahangiri
  • MohammadTaghi Sadeghi
  • Pouriya Esmaeilzadeh
Faculty of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
چکیده [English]

One of the most important methods of increasing extraction from carbonate reservoirs is to change the wettability of the reservoir rock with the emergence of nanotechnology, which played a significant role in the framework of methods of increasing Oil Recovery. The purpose of this project is to use nanofluids containing inorganic nanoparticles, which are economical and environmentally friendly. For this purpose, first, 3 types of inorganic nanoparticles SiO₂, Al₂O₃ and TiO₂, which were converted into nanometer size powder by mechanical method (Ball mill). Then, 3 nanofluids containing SiO₂, Al₂O₃ and TiO₂ were prepared along with dispersants and stabilizers. By performing the contact angle test, it was found that the contact angle of the oil drop on the oil-wet carbonate rock changed from 132.1° to 87.1° after coating with nanofluid with a concentration of at least 0.01 wt.%. Then the optimal concentration of nano fluid and the optimal time of thin section aging in nano fluid were determined, and the values of these parameters were 0.01% by weight and 7 days, respectively. In the following, it was shown that the stone coated with these nanofluids maintains its wettability well. Based on the interfacial tension test, it was shown that the interfacial tension decreased from 24.029 mN/m (water and oil) to 4 mN/m (nanofluid and oil) at ambient temperature. Finally, by conducting the Core Flooding test on the oil wet plugs, the investigations show that in the flooding test, the volume of extracted oil increased by 42.06% in the case of water injection to 60.09% in the case of nanofluid injection. (Residual oil decreased from 9.64 cm³ to 6.64 cm³ respectively.) In fact, the flooding recovery factor increased by 18% compared to the previous state.

کلیدواژه‌ها [English]

  • EOR (Enhanced Oil Recovery)
  • Nanofluids
  • Contact Angle
  • Interfacial Tension
  • Reservoir Wettability

مراجع

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پژوهش نفت
دوره 33، 1402-6 - شماره پیاپی 133
بهمن و اسفند 1402
صفحه 39-56

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