مطالعه آزمایشگاهی تزریق آب هوشمند و برگ سدر به عنوان ماده فعال سطحی طبیعی به منظور ازدیاد بردشت نفت از مخازن کربناته

نوع مقاله: مقاله پژوهشی

نویسندگان

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

2 گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه کردستان، سنندج، ایران

چکیده

در مخازن کربناته شکاف‌دار به دلیل شرایط ترشوندگی سنگ و متراکم بودن شبکه ماتریس سنگ، بازده بازیابی نفت پایین می‌باشد. یکی از روش‌های مناسب برای تغییر ترشوندگی سنگ مخزن کربناته، سیلاب‌زنی با آب هوشمند است. علاوه بر این استفاده از ماده فعال سطحی تهیه شده از عصاره برگ سدر به‌عنوان یک منبع غنی و ارزان، با بهبود خاصیت ترشوندگی منجر به افزایش ازدیاد برداشت نفت می‌شود. در این پژوهش اثر غلظت یون‌های Ca+2ا، Mg+2 و SO4-2 موجود در آب هوشمند و همچنین اثر غلظت بیوسورفکتانت بر میزان تغییر ترشوندگی سنگ کربناته از طریق آزمایش های زاویه تماس و سیلاب‌زنی مغزه مورد بررسی قرار گرفته است. نتایج حاصل نشان می‌دهد که افزایش غلظت یون‌های Ca+2 و Mg+2، از 01/0 تا 1 مولار، SO4-2 از 007/0 تا 1 مولار در آب هوشمند و مقدار ماده فعال سطحی حاصل از برگ سدر از 05/0% وزنی تا 3/0% وزنی در آب هوشمند، حالت ترشوندگی سنگ کربناته را به ترشونده با آب تغییر داده و مقدار برداشت نفت از 35 % به 57% افزایش می‌یابد. تغییر زاویه تماس از 161 درجه به 41 درجه در غلظت 3/0% وزنی از بیوسورفکتانت مشاهده می‌شود، که حاکی از تاثیر این محلول بر روی تغییر خاصیت ترشوندگی سنگ کربناته می‌باشد.
 

کلیدواژه‌ها


عنوان مقاله [English]

An Experimental Study of Smart Water and Cedar Leaf Flooding as a Natural Surfactant for Enhanced Oil Recovery from Carbonate Reservoirs

نویسندگان [English]

  • saeb ahmadi 1
  • mohsen vafaie sefti 1
  • Mohammad Mahdi Shadman 1
  • Seyed Omid Rastegar 2
1 Chemical Engineering Faculty, Tarbiat Modares University, Tehran, Iran
2 Department of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran
چکیده [English]

Fractured carbonate reservoirs have low oil recovery efficiency due to wettability and tightness of rock matrix. One of the most applicable methods for enhanced oil recovery of carbonate reservoirs is to use smart water flooding. In addition using surfactants which have been obtained from Cedar leaf extract as a rich and cheap source leads enhanced oil recovery by improving the wettability properties. In this research, the effect of Ca2+, Mg2+ and SO42- concentrations in the smart water and also Cedar leaves extract concentration as a biosurfactant on wettability of carbonate rocks have been investigated. The analysis which is including contact angle measurments and cre flooding eperiments have been examined. Results showed the effect of  Mg2+ and Ca2+ concentrations from 0.01 mol/L to 1 mol/L, SO42- concentration from 0.007 mol/L to 1 mol/L and biosurfactant concentration from 0.05 %(w/v)  to 0.3 %(w/v) changes the carbonate wettability to water-wet, and oil recovery has  increased from 35% to 57%. The contact angle has changed from 161 degrees to 41 degrees investigated in the 0.3 % (w/v) of biosurfactant concentration, which reflects the effect of the solution on the wettability of carbonate rocks.
 

کلیدواژه‌ها [English]

  • Carbonate Reservoirs
  • Contact Angle
  • Smart Water
  • Experimental
  • Natural Surfactant

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