تأثیر دما در ازدیاد برداشت نفت از محیط متخلخل دوبعدی حین تزریق سیال بسپاری پلی‌آکریل‌آمید

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی شیمی، دانشگاه تبریز

2 دانشیار مهندسی شیمی و نفت، دانشگاه تبریز

چکیده

تزریق آب داغ همواره یکی از سازوکارهای رایج در افزایش میزان بازیابی نفت از مخازن است؛ اما امروزه از روش‌های نوین ازدیاد برداشت برای بازیافت نفت استفاده می‌شود که یکی از این روش‌ها، سیلاب‌زنی محلول‌های بسپاری درون مخازن است. هدف از این تحقیق، بررسی فرایند بهبود بازیافت نفت گران‌رو با تزریق آب مقطر و محلول بسپاری پلی‌آکریل‌آمید از یک محیط متخلخل دو بعدی به‌صورت تجربی است. برای مطالعۀ الگوهای جریان حین تزریق سیال پایه و محلول بسپاری، تزریق سیالات جابه‌جاکننده در دبی ثابت 4mL/min انجام گرفت. هم‌چنین، برای بررسی اثر دمای سیال تزریقی در جابه‌جایی سیال- سیال و بهبود بازده بازیابی نفت، سیالات جابه‌جاکننده در دما­های 25 و 90 درجه سلسیوس تزریق شدند. نتایج مطالعۀ حاضر نشان داد که با افزودن پلی‌آکریل‌آمید به آب، گران‌روی سیال جابه‌جاکننده به‌میزان قابل توجهی افزایش پیدا کرده که منجربه افزایش عدد مویینگی شده و این امر سبب بهبود بازیافت نفت تا 2/65% هنگام تزریق محلول پلی‌آکریل‌آمید 5000 پی‌پی‌ام در دمای محیط می شود. هم‌چنین، افزایش دما با کاهش نسبت تحرک‌پذیری سیالات جابه‌جاشونده و جابه‌جاکننده، میزان برداشت نفت با تزریق محلول بسپاری 5000 پی‌پی‌ام تا 4/66% افزایش پیدا می کند که این مقدار، بیشترین میزان بازیافت نفت پایه با تزریق سیالات جابه‌جاکننده در مطالعۀ حاضر است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Temperature on Enhanced Oil Recovery from aTwo-Dimensional Porous Medium when Injecting Polyacrylamide Polymer Solution

نویسندگان [English]

  • M. Zarei Ghobadlou 1
  • M. Ahmadlouydarab 2
  • N. Asadzadeh 1
1 M. Sc. Student of Chemical Engineering, University of Tabriz
2 Associate Professor of Chemical & Petroleum Engineering, University of Tabriz
چکیده [English]

Hot water injection is one of the common mechanisms to enhance the oil recovery from reservoirs. But, novel methods of enhanced oil recovery are used for oil recovery, and one of them is flooding polymeric solutions inside the reservoirs. The main purpose of this experimental study is to investigate the process of enhancing the recovery of viscose oil by injecting distilled water and polyacrylamide-based polymeric solution from a two-dimensional porous medium. In order to study the flow patterns during the injection of base fluid and polymer solution, injection of displacing fluids was performed at a constant flowrate of 0.4 mL/min. Also, to investigate the effect of injected fluid temperature on fluid-fluid displacement and enhanced oil recovery efficiency, displacing fluids were injected at temperatures of 25°C and 90°C. The results showed that by adding polyacrylamide to water, the viscosity of the displacing fluid increased significantly, which led to an increase in the capillary number, and enhanced oil recovery up to 65.2% when injected with 0.5%wt polyacrylamide at ambient temperature. Also, increasing the temperature and reducing the mobility ratio of displacing fluids and base oil, the efficiency of oil recovery by injecting 5000ppm polymer solution increased to 66.4%, which is the maximum rate of base oil recovery by injecting displacing fluids in present study.

کلیدواژه‌ها [English]

  • Enhanced Oil Recovery
  • 2D Porous Medium
  • Polyacrylamide
  • Temperature

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مهندسی شیمی ایران
دوره 22، شماره 130
آذر و دی 1402
صفحه 118-128

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