مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تخمین میزان شاخص چاه‌ برداشت نفت در مخازن هیدروکربنی به کمک دینامیک سیالات محاسباتی

نویسندگان
سعید حیاتی جعفربیگی 1
مهدی مشرف دهکردی 2
مسعود ضیایی راد 3
1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه اصفهان، اصفهان، ایران
2 هیئت علمی-دانشگاه اصفهان
3 استادیار دانشگاه اصفهان
چکیده
در کار حاضر، جریان سیال درون یک بلوک از مخزن هیدروکربنی و جریان سیال درون حفره چاه برداشت حفاری شده در این بلوک مخزن به صورت سه بعدی شبیه‌سازی شده است. برای این منظور، جریان سیال تک فاز تراکم‌ناپذیر درون مخزن هیدروکربنی بر مبنای قانون دارسی (جریان درون محیط متخلخل) و جریان سیال درون حفره چاه بر مبنای معادله ناویر-استوکس (جریان آزاد) به صورت همزمان حل شده است. اثرات مربوط به شرایط مرزی اعمال شده روی وجوه بلوک مخزن، میزان خارج از مرکز بودن محل حفاری چاه عمودی درون بلوک مخزن و تراوایی مطلق سنگ مخزن روی رفتار جریان سیال بررسی شده است. در هر مورد، مقدار شاخص چاه به صورت عددی و با استفاده از توزیع فشار و سرعت جریان سیال درون بلوک مخزن و فشار سیال در حفره چاه تخمین زده شده و با مقادیر تحلیلی مقایسه شده است. نتایج عددی نشان می‌دهد که علاوه بر مشخصات هندسی چاه و بلوک مخزن و جنس سنگ مخزن، نوع شرط مرزی اعمال شده روی وجوه بلوک، میزان خارج از مرکز بودن محل حفاری چاه روی شعاع موثر چاه و همچنین شاخص چاه تاثیرگذار هستند.
کلیدواژه‌ها
دینامیک سیالات محاسباتی
مخزن هیدروکربنی
چاه عمودی برداشت
شاخص چاه

عنوان مقاله English

Approximation of Oil Production Well Index in Hydrocarbon Reservoirs Using Computational Fluid Dynamics

نویسندگان English

Saeed Hayati jafarbeigi 1
Mehdi Mosharaf Dehkordi 2
Masoud Ziaei-Rad 3
1 Mechanical engineering department, faculty of engineering, university of Isfahan Isfahan, Iran
2 Faculty member
3 عضو هیات علمی
چکیده English

In the present work, the three dimensional fluid flow inside a hydrocarbon reservoir block along with the fluid flow inside the wellbore of a production well drilled in this reservoir block is numerically simulated. To do this, the single-phase incompressible fluid flow in the hydrocarbon reservoir in terms of Darcy’s law (porous media flow) along with the fluid flow inside the wellbore in terms of Navier-Stokes equations (free flow) are simultaneously solved. The effects of boundary conditions imposed on the faces of the reservoir block, the off-centered wellbore, and the reservoir rock permeability on the fluid flow behavior inside a reservoir block are investigated. In each case, the well index is numerically approximated, using the pressure and velocity distributions in the reservoir block and the wellbore pressure, and compared with analytical well index. The numerical results indicate that the well equivalent radius and also the well index not only depend on the geometrical properties of reservoir block and well bore and the rock absolute permeability, but also depend on the boundary conditions imposed on the reservoir block faces and the well drilling location.

کلیدواژه‌ها English

Hydrocarbon reservoir
Vertical production well
Well index
Computational Fluid Dynamics
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مهندسی مکانیک مدرس
دوره 18، شماره 1
فروردین 1397
صفحه 177-187