مطالعه آزمایشگاهی فرآیند آشام در روش ازدیاد برداشت هیبریدی آب کم‎‎شور- ماده فعال‎سطحی

نوع مقاله : مقاله پژوهشی

نویسندگان

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

2 گروه مهندسی نفت، دانشکده نفت، دانشگاه صنعت نفت، اهواز، ایران

چکیده

بیش از 60% از نفت کشف‌شده دنیا در سنگ‌های کربناته ذخیره شده‌اند. نفت‎دوست بودن اکثر این مخازن، باعث شده است که در بیشتر موارد کارایی سیلاب‎زنی آبی در آن‎ها، بسیار پایین باشد. به‎دلیل تاثیر منفی نیروهای موئینگی، آب تزریقی نمی‎تواند به‌سادگی در ماتریس‎های نفت‌دوست نفوذ کند و نفت را وادار به خروج از ماتریس کند. تغییر ترشوندگی سطح سنگ، در مخازن نفت‎دوست، به‎سمت حالات نسبتاً آب‎دوست، به‎عنوان یکی از روش‎های بهبود بازیافت نفت مطرح شده است. روش‌های گوناگونی برای تغییر ترشوندگی مخازن وجود دارد که از بین آن‎ها می‎توان به استفاده از مواد فعال‎سطحی و آب‎های کم‎شور اشاره کرد. هر دو این روش‌ها در مطالعات گسترده‌ای و به‌طور جداگانه مورد بررسی قرارگرفته‌اند. در این پژوهش به بررسی اثر هیبریدی ماده فعال‎سطحی در محیط‎های کم‎‎شور پرداخته شد. بدین منظور، نمونه‎های نفت و سنگ مخزن از یکی از میادین جنوب ایران تهیه و مشخصات آن‎ها اندازه‎گیری شد. سپس آزمایش‎های آشام آب سازند، آب کم‎‎شور و ماده فعال‎سطحی AOT در حضور آب کم‎‎شور انجام شد. نتایج بهبود ضریب بازیافت نفت در حضور ماده فعال‎سطحی و آب کم‌شور را نشان داد. آشام ماده فعال‎سطحی آنیونی در محیط کم‌شور منجر به‎دست‎یابی به بازیافت 56% از نفت خام C1 و 37% از نفت خام C2 شد.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Investigation of Imbibition Process in a Hybrid Low Salinity- Surfactant EOR Method

نویسندگان [English]

  • Sepideh Veiskarami 1
  • Arezou Jafari 1
  • Abouzar Soleymanzadeh 2
1 Chemical Engineering Faculty, Petroleum Engineering Department, Tarbiat Modares University, Tehran, Iran
2 Petroleum Engineering Department, Petroleum Engineering College, University of Technology, Ahwaz, Iran
چکیده [English]

More than 60% of the world’s discovered oil reservoirs are stored in carbonate rocks. In most cases, oil-wetness of these formation has led to low recovery factor in the water-flooding process. Due to the negative effect of capillary forces, injected water cannot easily penetrate the oil-wet matrices and push oil to leave the matrix. Wettability alteration of the rock in relatively oil-wet formations has been considered as an approach to improve oil recovery. There are various methods for changing the wettability of reservoirs, among them, surfactants and low salinity waters are mentioned. Both of these methods have been studied in a wide variety of separate studies. In this study, the effect of hybrid low salinity surfactant was investigated. For this purpose, samples of oil and reservoir rock were prepared from one of the Iranian south oil reservoirs and their characteristics have been measured. Then, imbibition experiments of formation brine, low salinity water and low salinity water in the presence of AOT surfactants have been done. Results showed an improvement in the oil recovery in the low salinity surfactant formulation. The anionic surfactant in the low salinity environment has resulted in the recovery of 56% of crude oil C1 and 37% of crude oil C2.
 

کلیدواژه‌ها [English]

  • Imbibition Process
  • Wettability Alteration
  • Recovery Factor
  • Surfactants
  • Low salinity
  • Low Salinity-Surfactant Hybrid Method
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