نوع مقاله : علمی-پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، گروه مهندسی نفت، دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران
2 دانشیار، گروه مهندسی نفت، دانشکده مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
There is no doubt that Well Testing is known for its powerful capacity to detect the production values of drilled wells and to optimize their production methods from oil reservoirs, due to pressure and rate variations inside the wells. Oil reservoirs are heterogeneous and unknown hydrocarbon formations that require precise evaluation and specialized techniques for better understanding. After applying Well Testing on each drilled well in real reservoirs, pressure and time data are plotted together on different diagrams using logarithmic, semi-logarithmic, or Cartesian scales. These plots allow us to interpret initial models and extract important factors such as Flow Regime Types (linear, radial, or spherical, based on plotting different straight lines with slopes of 1, 0.5, 0.25, and 0) and the area of the reservoir, among others. In this paper, we focus on Dimensional Pressure Transient Analysis Diagrams and their derivative diagrams based on the common logarithm scale. We have defined a variable Alpha parameter and a constant Alpha parameter (the maximum variable Alpha parameter) in Python code. The constant Alpha parameter in fractured reservoirs is higher than in ideal oil reservoirs. Using these parameters, we plot different PTA diagrams under various conditions to perform critical comparisons. The results indicate that assuming a constant Alpha parameter on pressure derivative plots shows greater spacing between the final points of the pressure derivative diagrams, known as “End Effect” points, clearly demonstrating the constant behavior of the pressure derivative points at the end.
کلیدواژهها [English]
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