مروری بر مطالعات اخیر پیرامون مدل سازی تزریق فوم در محیط متخلخل

نوع مقاله : مقاله مروری

نویسندگان

دانشکده مهندسی شیمی نفت و گاز دانشگاه علم و صنعت ایران

چکیده

فوم سیالی است که از فاز گاز، آب و سورفکتانت تشکیل شده است، سورفکتانت که
به
صورت محلول در آب است، به‌منظور پایداری این سیال استفاده میشود. از اواخر دهۀ 50 و اوایل دهۀ 60، فوم بهعنوان یک تکنیکی امیدوار کننده بهمنظور کنترل تحرک گاز و سازگاری در محیط متخلخل و هم‌چنین رفع مشکلاتی از قبیل پدیدۀ انگشتیشدن، میان‌شکنی زودهنگام گاز و رانش گرانشی که با تزریق گاز
ایجاد می‌شوند، ارائه شد. کاربردهای تزریق فوم عبارت است از ازدیاد برداشت، اسیدزنی ماتریس، جلوگیری از نشت گاز، اصلاح لایه
های آبده آلوده، بستن مسیری در محیط متخلخل بهمنظور کنترل جریان و جهتدهی به آن. برای درک فیزیکی رفتار این سیال، مدل‌سازی آن با دو رویکرد کلی موازنۀ جمعیت (PB) و تعادل محلی-بافت ضمنی (IT-LE) انجام میگیرد. در این مقاله به توضیح و شرح این رویکردها و مدل‌های مربوطه پرداخته شده است. هم‌چنین میان تکنیک‌های ارائه‌شده مقایسه‌ای کلی شده است. الگوی موازنۀ جمعیت به دو نسخۀ بافت دینامیکی و تعادل محلی تقسیم میشود. تفاوت اصلی بین این دو نسخه در نحوۀ به‌دست‌آوردن بافت فوم است. نتایج نشان میدهد که تکنیک تعادل محلی-بافت ضمنی به مؤلفه‌های کمتری نسبت به نسخه‌های مدل تعادل جمعیت نیاز دارد. هم‌چنین بهدلیل حل معادلات بهصورت جبری، زمان محاسبۀ کمتری را در شبیه‌سازهای مخزن از آن خود می‌کند و بهدلیل ماهیت تجربی دارای کاربرد بیشتری است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

A Review on Recent Studies on the Simulation of Foam Flooding in Porous Media

نویسندگان [English]

  • S. Shahmarvand
  • F. Ameli
Iran University of Science and Technology
چکیده [English]

Foam is a fluid that consists of water, gas, and surfactant, so that its properties are a combination of the two. Water-soluble surfactant is used to stabilize the fluid. From the late 50s and early 60s, foam as a promising technique to control gas mobility and adaptability to porous media, as well as solving problems such as finger phenomenon, early gas breakthrough, gravity override, etc. that are created by gas injection are presented. Applications of foam injection including: EOR, matrix acidizing, prevention of gas leakage, repair of aquifer layers, closing the path in the porous medium in order to control the flow and direct it. To understand the physicality of this fluid, it has been modeled in the past with two general techniques of population balance and local equilibrium. In this article, these approaches and models are explained. Also, a general comparison has been made between the presented techniques. The population balance pattern, which is based on the rules of bubble balance, is classified into two versions: 1- dynamic texture and 2- local equilibrium. The main difference between the two versions is in how to obtain the foam texture. The results show that the local-implicit texture equilibrium technique requires fewer parameters than the population balance model versions. Also, due to the algebraic solution of equations, it takes less computational time in reservoir simulators and is more useful due to its experimental nature.

کلیدواژه‌ها [English]

  • Foam Injection
  • Modeling of Foam Flow
  • EOR
  • Population Balancing and Local Equilibrium Techniques
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