بررسی آزمایشگاهی اثر نانوذرات اکسید کبالت بر کمترین فشار امتزاجی و ترسیب آسفالتین در سیستم نفت سنتزی آسفالتینی و گاز دی‌اکسیدکربن با استفاده از روش اندازه‌گیری ناپدید شدن کشش بین سطحی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 بخش مهندسی نفت، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه شیراز، ایران

2 کارشناس مهندسی مخزن/شرکت ملی مناطق نفت خیز جنوب

3 مرکز تحقیقات پیشرفته ازدیاد برداشت از مخازن نفتی، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه شیراز، ایران

چکیده

 مطالعه آزمایشگاهی حاضر به بررسی اثر افزودن نانوذرات اکسید کبالت با درصد وزنی 1/0 درصد وزنی به نفت سنتز شده آسفالتینی (با درصدهای مختلف تولوئن و نرمال هپتان) بر کشش بین سطحی، ترسیب آسفالتین و  فرایند امتزاج پذیری با گاز دی‌اکسیدکربن با استفاده از روش ناپدید شدن کشش بین سطحی در دمای C° 50 و بازه فشاری مختلف پرداخته است. نتایج نشان می‌دهد که افزودن نانوذرات اکسید کبالت به نفت سنتز شده، سبب کاهش در کشش بین سطحی، کمترین فشار امتزاج پذیری و شدت فرآیند ترسیب آسفالتین شد. به‌عنوان مثال، کمترین فشار امتزاج‌پذیری به طور میانگین حدود 32% و شدت ترسیب آسفالتین در سطح تماس بین سیالات، حدود 13% در نفت‌های سنتزی آسفالتینی کاهش یافت. در این فرآیند نانوذرات به عنوان جاذب آسفالتین عمل کرده و افزودن آنها به نفت‌ها نقش موثری در کاهش ترسیب آسفالتین و افزایش انحلال‌پذیری گاز دی‌اکسیدکربن در این نفت‌ها داشته است.
 

کلیدواژه‌ها


عنوان مقاله [English]

The Impact of Cobalt Oxide Nanoparticles on MMP and Asphaltene Precipitation of Synthetic Oil in the Presence of Gaseous Carbon Dioxide

نویسندگان [English]

  • Sadegh Hasanpor 1
  • Sajjad Rabbani Fard 2
  • Mohammad Reza Malayeri 1
  • Masoud Riazi 3
  • Mina Sarani 1
1 Department of Petroleum Engineering, School of Chemical & Petroleum Engineering, Shiraz University, Iran
2 National Iranian South Oil Company (NISOC), Iran
3 EOR Research Center, Department of Petroleum Engineering, School of Chemical & Petroleum Engineering, Shiraz University, Iran
چکیده [English]

The impact of Co3O4 nanoparticles with concentration of 0.1 wt%has experimentally been studied on (1) interfacial tension, (2) asphaltene precipitation and (3) miscibility with the carbon dioxide, when the Co3O4 nanoparticles have been added to one of Iranian crude oils and synthetic oil solutions . To do so, the Vanishing Interfacial Tension (VIT) technique has been used for a pressure of up to 1200 psi. The results have been showed that in the presence of Co3O4 nanoparticles, IFT, Minimum Miscibility Pressure (MMP) and severity of asphaltene precipitation have all been reduced to some extent. Within the range of operating conditions attempted here, MMP has reduced as much as 32% and 19% for the synthetic and crude oils, respectively. The severity of asphaltene precipitation has also reduced approximately 13% for the asphaltenic synthetic oil and 7% for the investigated crude oil. The experimental results appear to show that Co3O4 nanoparticles served to adsorb asphaltene which would, in turn, facilitated the solubility of CO2 in synthetic and crude oils which consequently would lead to enhanced oil recovery.
 

کلیدواژه‌ها [English]

  • Asphaltene
  • IFT
  • Miscibility
  • Cobalt Oxide Nanoparticles
  • Carbon Dioxide

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