The field production data from the Shuaiba formation in Oman demonstrate the potential of recovering oil from the capillary transition zones. However, due to the uncertainties in characterizing the initial oil saturation distribution and describing the oil mobility and residual oil saturation through the transition zone, accurate prediction of oil production and ultimate recovery from these transition zones especially for the fields with relatively thin oil columns (~5-30m) but large areal extents remain an ongoing challenge. To address this challenge, in the past ten years extensive core characterization and special core analysis (SCAL) experimental data have been gathered from the Shuaiba formation. These SCAL data together with geological, petrophysical and field dynamic data have led to an improved prediction of waterflooding performance from such transition zone fields.
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