مطالعه تجربی تأثیر دما و تراوایی بر سیلابزنی پلیمر

دارش, اسماعیل; کشاورز مروجی, مصطفی; جعفری, آرزو; پروانه, ارسلان; علیزاده, امید

مطالعه تجربی تأثیر دما و تراوایی بر سیلابزنی پلیمر

نوع مقاله : پژوهشی اصیل

نویسندگان

اسماعیل دارش ¹

مصطفی کشاورز مروجی ²

آرزو جعفری ³

ارسلان پروانه ⁴

امید علیزاده ⁵

¹ دانشگاه ازاد اسلامی

² امیرکبیر

³ دانشگاه تربیت مدرس

⁴ دانشگاه رازی

⁵ دانشگاه ازاد رشت

چکیده

موضوع تحقیق: بررسی اثر دما برعملکرد سیلابزنی پلیمر در مقیاس منفذ در محیطهای متخلخل با تراوایی متفاوت، به درک درستی از رفتار محلول پلیمر می انجامد.

روش تحقیق: در این مطالعه اثر دما بر سیلابزنی پلیمر پلیاکریلآمید بر ازدیاد برداشت نفت در دو میکرومدل همگن با تراواییهای مختلف در دماهای ۲۵ و °C7۰ مورد بررسی قرار گرفت. محلول پلیمر و آب مقطر با سرعت تزریق 1 میکرو لیتر در دقیقه تا یک حجم منافذ به میکرومدل تزریق شدند و میزان برداشت نفت و نحوه حرکت سیال درون محیط متخلخل مورد مطالعه قرار گرفت. علاوه براین رئولوژی پلیمر و گرانروی سیالات تزریقی جهت تحلیل بهتر نتایج، اندازهگیری شدند. سپس نتایج با سیلابزنی آب مقطر به عنوان تست شاهد مقایسه گردید.

نتایــج اصلــی: با بررسی نتایج سیلابزنی مشخص شد که فاکتور دما از یک طرف با کاهش گرانروی نفت به افزایش بازیافت آن کمک کرده و از طرف دیگر با کاهش گرانروی پلیمر، باعث کاهش نقش گرانروی سیال تزریقی در میزان برداشت نفت شده است. نتایج بدست آمده نشان داد که در حالت تزریق پلیمر پدیده انگشتی شدن کاهش و با افزایش دما میزان بهبود بازیافت نفت طی سیلابزنی پلیمر و آب در هر دو مدل افزایش مییابد. همچنین میزان بهبود بازیافت نفت طی سیلابزنی پلیمر در میکرومدل الف از حدود 43 درصد در دمای محیط به بیش از 51 درصد و در میکرومدل ب از حدود ۵1 درصد به بیش از 60 درصد در دمای °C 70 افزایش یافت. در واقع میتوان گفت که الگوی جریان و پایداری جبهه حرکت محلول پلیمر و در نتیجه بازیافت نهایی نفت بطور قابل توجهی تحت تأثیر مورفولوژی منافذ، شکل و گلوگاه منافذ قرار دارد.

کلیدواژه‌ها

دما

تراوایی

پلیمر پلی اکریل آمید

سیلابزنی پلیمر

میکرومدل

موضوعات

مهندسی نفت

عنوان مقاله English

Experimental study of temperature and permeability effect on polymer flooding

نویسندگان English

Esmaeil Darash ¹

Mostafa Keshavarz Moraveji ²

Arezou Jafari ³

Arsalan Parvareh ⁴

Omid Alizadeh ⁵

¹ Islamic Azad University

² Amirkabir University of Technology

³ Tarbiat Modares University

⁴ Razi University

⁵ Islamic Azad University

چکیده English

Research subject: Investigation of the effect of temperature on the polymer flooding performance at the pore scale, leads to an understanding of the behavior of the polymer solution in porous media with varying permeability.

Research approach: In this study, the effect of temperature on flooding of polyacrylamide polymer on enhanced oil recovery in two homogeneous micromodels at 25 and 70 °C was investigated. The polymer solution and DW were injected at the injection rate of 1 μl/min up to 1 PV into the micromodel and the amount of produced oil and the movement of the injected fluid in the porous medium were analyzed. In addition, polymer rheology and injected fluid viscosity were measured for better analysis of results. Then the results were compared with flooding of distilled water as the control test.

Main results: Examining the flood results, it was found that on the one hand, the temperature factor helped to increase oil recovery by reducing the viscosity of the oil. On the other hand, it has reduced the role of injected fluid viscosity in oil extraction by reducing the viscosity of the polymer. The results showed that the phenomenon of fingering decreases in the case of polymer injection, and the rate of improvement of oil recovery during polymer and water flooding in both micromodels increases with increasing temperature. Also, the rate of improvement of oil recovery during polymer flooding in the A micromodel increased from about 43% at ambient temperature to more than 51% and in the B micromodel from about 51% to more than 60% at 70 °C. In fact, it can be said that the flow pattern and stability of the polymer solution front and consequently the ultimate oil recovery are significantly affected by the morphology of the pores, the shape and the throats pores.

کلیدواژه‌ها English

Temperature

permeability

polyacrylamide polymer

polymer flooding

Micromodel

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