بررسی تاثیر قطر ذرات از پیش تشکیل‌شده ژل‌پلیمر (پلی‌اکریل‌آمید و استات کروم) در کاهش نامتجانس تراوایی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی، دانشگاه تربیت مدرس، تهران، ایران

2 پژوهشکده مهندسی نفت، پژوهشگاه شیمی و مهندسی شیمی ایران، تهران، ایران

3 گروه پژوهشی سیال مخزن، پژوهشکده مهندسی نفت، پژوهشگاه صنعت نفت، تهران، ایران

چکیده

در سال‌های اخیر انواع ژل‌ها برای کنترل تولید آب اضافی در چاه‌های نفت به‌کار می‌روند. استفاده از ذرات ژل از پیش تشکیل‌شده یکی از روش‌های مناسب برای بستن مسیر آب بدون بستن مسیر تولید نفت و مناطق دارای هیدروکربن است. در این پژوهش نوعی از ذرات ژل با استفاده از کوپلیمر پلی‌اکریل آمید سولفونه و شبکه‌ساز استات کروم (III) تهیه شد. روش آنالیز برش نوسانی با دامنه کوتاه برای بررسی استحکام، گرانروی ترکیبی و مدول ذخیره و ویسکوز نهایی ژل تهیه شده به‌کار رفت. گرانروی ترکیبی و مدول ذخیره نهایی ژل به ترتیب برابر Pa.s 5919 و kPa 4/35 تعیین شد. برای بررسی عملکرد ذرات ژل در محیط متخلخل از آزمایش سیلاب‌زنی استفاده شد. همچنین برای مطالعه اثر اندازه ذرات در فشار تزریق و ضرایب مقاومت باقی‌مانده آب و نفت، دو اندازه مختلف از ذرات ژل (63-106 و μm 106-188) در سیلاب‌زنی به کار رفت. مقدار شاخص کاهش نامتجانس تراوایی برای دو اندازه کوچک و بزرگ ذرات ژل به ترتیب برابر 196/3 و 038/4 و ضرایب مقاومت باقی‌مانده آب به‌ترتیب برابر 42/41 و 22/53 به‌دست آمد. نتایج نشان داد که اندازه ذرات ژل روی ضریب مقاومت باقی‌مانده آب موثرتر از ضریب مقاومت باقی‌مانده نفت است.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of the Size Effect of Preformed Particle Gels (Polyacrylamide and Chromium Acetate) on Disproportionate Permeability Reduction

نویسندگان [English]

  • Aghdas Heidari 1
  • Mohsen Vafaie Sefti 1
  • Ebrahim Vashegani Farahani 1
  • Mahsa Baghban Salehi 2
  • Hasan Naderi 3
1 Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
2 Institute of Petroleum Engineering, Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
3 Reservoir Research Group, Research Institute of Petroleum Engineering, Research Institute of Petroleum Industry, (RIPI) Tehran, Iran
چکیده [English]

During recent years, various types of gels are used to control excess water in oil wells. The exploiting of preformed particle gels (PPG) can be considered as a good candidate to shutoff water channels without blocking of oil bearing zones. In this research, the preformed particle gel has been synthesized from Sulfonated polyacrylamide copolymer and chromium acetate (III) as crosslinker. The analysis of low amplitude oscillatory shear method was used to study on gel strength, complex viscosity, ultimate storage, and viscous modulus. The complex viscosity and ultimate storage modulus of gel were determined about 5919 Pa.s and 35.4 kPa respectively. The core flooding test was used to study of PPG performance in porous media. Further, two different size particle gels (63-106 and 106-188 micron) were applied to investigate the particle size effect on injection pressure and residual resistance factor of water and oil. The disproportionate permeability reduction index of 3.196 and 4.038, and water residual resistance factor of 41.42 and 53.22 were determined for small and large particle gels respectively. The results showed that the gel particle size on the residual resistance factor of water was more effective than the oil residual resistance factor.
 

کلیدواژه‌ها [English]

  • Preformed Particle Gel
  • Disproportionate Permeability Reduction
  • Water Control
  • Gel Particle Size
  • In-depth Profile Modification

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