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سال انتشار: 1385

محل انتشار: ششمین همایش ملی دانشجویی مهندسی شیمی و پنجمین همایش ملی دانشجویی مهندسی نفت

تعداد صفحات: 8

نویسنده(ها):

فرشید ترابی – University of Regina, Regina, Saskatchewan, Canada, National Iranian Oil Company
کوروش اصغری –

چکیده:

Fractured carbonate reservoirs are among the largest resources of oil in the world. A large
number of these reservoirs are in Middle East and producing at very high production rates. In
most of these reservoirs gravity drainage is the main production mechanism, where gas injection
(recycling) has been one of the main pressure maintenance methods for maintaining these high
production rates. In some of these reservoirs, immiscible gas/oil displacement may be used as a
means of improved oil recovery method for increasing the productivity for a period of time,
depending on the reservoir and fluid characteristics. However, in some reservoirs at which the
matrix rock is dense and its porosity is very low, or in the case of heavy oil reservoirs, gas
breakthrough and very low flow rates are the main difficulties facing the immiscible gas/oil
displacement. In such cases, miscible displacement can be used as an alternative EOR method.
This paper presents the results of simulation investigations conducted for the miscible
displacement of oil with injected carbon dioxide in a fractured model. Here, the results of both
immiscible and miscible displacement in a lab scale fractured model have been presented. The
was utilized in this study. A sensitivity analysis was carried
commercial simulator, CMG-GEM
out and effect of different parameters such as model pressure, fracture spacing, fracture to matrix
permeability ratio and grid size on the miscible displacement were investigated.