چاه‌آزمایی مخازن گازی دو ناحیه‌ای دارای شکاف هیدرولیکی از طریق شبیه‌سازی بدون بعد عددی

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران، ایران

چکیده

تولید نفت و گاز از مخازن هیدروکربوری همواره منجر به بروز مشکلاتی از قبیل آسیب‌سازند می‌شود. ایجاد شکاف هیدرولیکی به‌خصوص در مخازن غیرمتعارف گازی می‌تواند تا حدی این مشکل را برطرف نماید. لزوم استفاده از ویژگی‌های میدانی نیازمند این است که مخزن با تمامی ناهمگونی‌ها و لایه‌های متعدد آن شبیه‌سازی شود. در این مقاله، معادلات حاکم بر مخزن دو ناحیه‌ای با شکاف هیدرولیک در ناحیه اول، به‌صورت بدون بعد حل‌شده و نمودارهای الگو برای چاه‌آزمایی این مخازن بررسی‌شده است. این مخزن از دو ناحیه داخلی و خارجی تشکیل‌شده است. ناحیه داخلی شامل یک شکاف هیدرولیکی و یک چاه تولیدی است. با توجه به نامحدود بودن شکاف، تمام تولید از شکاف انجام می‌شود و سیال به‌محض ورود به فضای شکاف، تولید می‌شود. مرزهای خارجی مخزن بسته در نظر گرفته ‌شده است. وجود شکاف هیدرولیکی در مخازن گازی کم‌تراوای دو ناحیه‌ای باعث می‌شود که منحنی مشتق شبه‌فشار و شبه‌فشار بدون بعد به پنج بخش متفاوت تقسیم شود. این پنج بخش به ترتیب عبارت‌اند از: اثر شکاف هیدرولیک، جریان شعاعی ناحیه داخلی، جریان گذرای بین ناحیه داخلی و خارجی، جریان شعاعی ناحیه خارجی و اثر مرزهای مخزن است.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Hydraulically Fractured Bi-zonal Gas Reservoir Well Testing Using Dimensionless Numerical Simulation

نویسندگان [English]

  • Mohammad Azadi tabar
  • Mohammad Mohammadi
  • Saeid Jamshidi
Faculty of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
چکیده [English]

Oil and gas production from reservoirs always causes some problems. Hydraulically, fracturing could somehow mitigate the challenges especially for unconventional gas reservoirs. In order to gain a real knowledge of the reservoir, we should consider the reservoir with its heterogeneity and different layers. In this work, dominant equations of a hydraulically fractured bi-zonal gas reservoir are solved in a dimensionless way; moreover, type curves for well testing of this reservoir are discussed. This reservoir consists of inner and outer zones. The inner zone consists of a vertical hydraulic fracture and a vertical well. As the fracture acts infinitely, whole amount of fluid is produced within the fracture. The outer boundary of the reservoir is closed. Existence of a hydraulic fracture in a bi-zonal tight gas reservoir would cause the dimensionless pseudo-pressure and dimensionless pseudo-pressure derivative to be segmented into five sections. These five sections are caused by hydraulic fracture, radial flow of the inner zone, transient flow between the inner and the outer zones, radial flow of the outer zone, and the boundaries effects respectively.
 

کلیدواژه‌ها [English]

  • Dimensionless Simulation
  • Well Testing
  • Unconventional Gas Reservoir
  • Hydraulic Fracture
  • Bi-zonal Reservoir

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