مطالعه تجربی جریان چندفازی و اثر وجود ترک بر ازدیاد برداشت در بستر متخلخل

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک و مکاترونیک، دانشگاه صنعتی شاهرود، شاهرود، ایران

چکیده

راه‌کارهای استخراج نفت باقی‌مانده در مخزن را ازدیاد برداشت می‌نامند. از جمله روش‌های مرسوم ازدیاد برداشت‌، تزریق متناوب آب و گاز است که بررسی این روش تزریق در بستر متخلخل دوبعدی، کمتر موردتوجه بوده است. در این پژوهش تجربی دو بستر متخلخل، با استفاده از چاپگر سه‌بعدی ساخته شد که یکی ساده و دیگری دارای ترک افقی است. از سیالات گاز نیتروژن و آب، در سه سناریو، به صورت تزریق تنهای گاز، آب و تزریق متناوب هر دو، به منظور ازدیاد برداشت استفاده شده است. سپس با پردازش تصویر، میزان برداشت هر کدام از سناریوهای تزریق، محاسبه گردید. نتایج این مطالعه نشان می‌دهد که تزریق متناوب، در بستر ساده حدود 55 درصد محیط را جاروب می‌کند که این میزان بیش از 6 برابر برداشت تزریق تنهای گاز و بیش از2/5 برابر برداشت تزریق تنهای آب است. همچنین تزریق متناوب در بستر با ترک حدود 38 درصد محیط را جاروب می‌کند که این میزان بیش از 2/5 برابر هرکدام از دیگر تزریق‌ها است. علت تفاوت برداشت در دو بستر در تزریق متناوب، تأثیر منفی وجود ترک است. همچنین دلیل تفاوت تزریق متناوب و تزریق‌های تنها را می‌توان در نمودار افت فشار یافت. بدین صورت که نمودار افت فشار تزریق متناوب، رفتاری مرکب از تزریق گاز و آب مجزا دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

An Experimental Investigation of Multi-Phase Flow and the Effect of Fracture on Enhanced Oil Recovery in the Porous Medium

نویسندگان [English]

  • karim jafarian
  • Mohammad Hasan Kayhani
  • Mohsen Nazari
  • Bahador Ghorbanbakhsh
Faculty of Mechanical And Mechatronics Engineering, Shahrood University of Technology, Shahrood, Iran
چکیده [English]

Strategies for extracting residual oil in the reservoir are called enhanced oil recovery. One of the usual methods of enhanced oil recovery is the water alternating gas injection. The study of this injection method in a two-dimensional porous medium has been less considered. In this study, two porous media were made using a 3D printer. One is simple, and the other has a horizontal fracture. Nitrogen gas and water have been used in three different scenarios, in the form of a single injection of gas, water, and the water alternating gas injection, to increase the oil recovery. Then, the recovery of each injection scenario was calculated by processing the captured images. This study showed that the water alternating gas injection in the simple medium swept about 55% of the medium, which was more than 6 times the injection of gas and more than 2.5 times the injection of water. water alternating gas injection also swept about 38% of the fracture medium, which was 2.5 times more than the other two injection scenarios. The reason for the difference in recovery between the two media in water alternating gas injection is the negative impact of fracture. Also, the difference between water alternating gas injections and single injections can be found in the pressure drop diagram. The water alternating gas injection pressure drop consisted of separate injections of gas and water.

کلیدواژه‌ها [English]

  • Oil
  • Enhanced oil recovery
  • Porous medium
  • Fracture
  • Water alternating gas injection

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نشریه مهندسی مکانیک امیرکبیر
دوره 54، شماره 11
بهمن 1401
صفحه 2499-2518

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