مطـالعه و بررسـی اثـرات متـقابل اجـزای مختلف سیـستم « نفـت - آب - سنـگ» در فرآیند تزریق آب در سنگ مخزن بنگستان و آسماری

نوع مقاله: مقاله پژوهشی

نویسندگان

پژوهشکده مهندسی نفت پژوهشگاه صنعت نفت

چکیده

جابجایی توسط سفره آبی یکی از مکانیزم‌های تولید نفت در مخازن جهان و در برخی از مخازن نفتی ایران می‌باشد. در این مکانیزم پارامترهای متعددی بر روند تولید تأثیرگذار هستند که مهم‌ترین آنها ترکیب شیمیایی نفت و آب موجود در فضای متخلخل سنگ مخزن و اثرات متقابل سیالات و سنگ است. از این جهت بررسی نتایج تزریق آب در سیستم "نفت- آب- سنگ" حائز اهمیت است. میزان تولید نفت بر اثر تزریق آب، به‌علت گوناگونی ترکیب نفت و آب و در نتیجه نیروهای تأثیرگذار بر روی جابجایی، در سیستم‌های مختلف "نفت- آب- سنگ" می‌تواند خیلی متفاوت باشد. در مطالعات صورت گرفته بر روی سنگ مخزن سازند‌های آسماری و بنگستان، تزریق آب در سیستم‌های متفاوت سیالات و سنگ بررسی و نتایج آن با لحاظ کردن نیروهای مکانیکی و کلوئیدی، براساس تئوری DLVO شرح داده شده است. نتایج حاصل از مطالعات سیستم‌های مختلف "نفت- آب- سنگ" نشان می‌دهد که میزان تولید نفت بستگی به تأثیر متقابل بین سنگ و سیالات دارد و برتری نیروهای مختلف از جمله نیروهای کلوئیدی، موئینه، گرانروی، کشش بین سطحی بین سنگ و دو سیال آب و نفت تحت تاثیر شرایط موجود سیستم "نفت- آب- سنگ" می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Study of Interaction of COBR System Components during Water Injection in Asmari and Bangestan Reservoir Rocks

نویسندگان [English]

  • R. Behin
  • M. R. Esfahani
Reservoir Engineering Research Center, RIPI
چکیده [English]

Aquifer displacement is one of the mechanisms of oil production in the reservoirs around the world as well as some reservoirs in Iran. A variety of parameters affect this mechanism, among which the most important ones are oil and water composition as well as the interactions between crude oil, brine and rock. When it comes to “Crude Oil-Brine-Rock” system, the evaluation of water injection is of much importance. The oil recovery based on water injection can be different in various compositions of “Crude Oil-Brine-Rock” system depending on the variety of oil, water composition and forces effective on displacement.In the conducted researches on oil reservoirs of Asmari and Bangestan formations, water injection has been reviewed under different compositions of fluids and rocks. The results have been outlined based on DLVO theory with regards to mechanical and colloidal forces. The study on various “Crude Oil-Brine-Rock” systems indicates that oil recovery depends on the interaction of rock and fluids and the superiority of different forces. The most notable among those forces are colloidal, capillary and viscosity. The interaction between fluid and rock is influenced by the circumstances of the incumbent “Crude Oil-Brine-Rock” system.

کلیدواژه‌ها [English]

  • oil recovery
  • Interfacial Tension
  • Water Injection
  • DLVO Theory
  • Asphaltene
  • Oil-Brine-Rock system
  • Colloidal system
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