بررسی اثر حلالیت ترکیبات نفت خام اسیدی در آب بر کشش سطحی و بین سطحی در فرآیند تزریق آب کم شور

نوع مقاله: مقاله پژوهشی

نویسندگان

انستیتو مهندسی نفت، پردیس دانشکده‌های فنی، دانشگاه تهران، ایران

10.22078/pr.2019.3755.2712

چکیده

در این مطالعه سعی شده است تا اثر حلالیت ترکیبات آمفیفیلیکی نفت خام اسیدی در آب بر کشش سطحی و کشش بین سطحی در کنار نمک‌های کلریدسدیم و سولفات‌سدیم مورد بررسی قرار گیرد. بر همین اساس، آب مقطر به همراه آب نمک‌های سدیم کلرید و سدیم سولفات در قدرت یونی صفر تا M 2 در تماس با نفت خام قرار داده شدند تا به صورت اشباع از ترکیبات آمفیفیلیکی درآیند. بررسی اثر این ترکیبات بر روی خواص آب‌های در تماس، توسط آزمایشات pH، مقدار کل کربن آلی (TOC)، کشش سطحی آب/هوا و کشش بین سطحی آب/نرمال دکان انجام شد. نتایج نشان می‌دهد مقدار کمی از ترکیبات آمفیفیلکی نفت خام، به خصوص ترکیبات بازی و اسیدی، در آب حضور پیدا می‌کنند که تأثیر به سزایی در کاهش کشش سطحی و بین سطحی دارند. همچنین، مشاهدات نشان می‌دهد که برای هر دو آب نمک کلریدسدیم و سولفات سدیم با افزایش قدرت یونی آب، نقطه شوری بهینه‌ای در بازه 1/0 تا M 25/0 برای هر دو نمک وجود دارد که مقدار کشش سطحی و بین سطحی در این نقطه کمینه می‌شود.
 

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Water-Soluble Compounds of Acidic Crude Oil on Surface and Inter facial Tension in Low Salinity Water Injection

نویسندگان [English]

  • mohsen bahaloo horeh
  • salman ghorbanizadeh
  • Behzad Rostami
Institute of Petroleum Engineering, College of Engineering, University of Tehran, Iran
چکیده [English]

In this study, the effect of water-soluble amphiphilic compounds of crude oil and ionic composition of water, on surface and interfacial tension were investigated. Distilled water and salt water of NaCl and Na2SO4 in five ionic strengths up to 2 molar were contacted to the crude oil to be saturated with crude oil amphiphilic compounds. The effect of these compounds on water properties are examined with pH, total organic carbon (TOC), surface tension and interfacial tension tests. Finally, the obtained results show that a low amount of acidic and basic compounds of crude oil were dissolved in contacted waters which have significant effect on surface and interfacial tension. In addition, the results reveal that by increasing the ionic strength of NaCl and Na2SO4 salt water, there is optimal salinity between 0.1 and 0.25 molar.
 

کلیدواژه‌ها [English]

  • Surface Tension
  • Interfacial Tension
  • salt water
  • acidic crude oil
  • amphiphilic compounds
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