RESERVOIR SIMULATION WITH HISTORY-DEPENDENT SATURATION FUNCTIONS.
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The model is based upon remembering the saturation history of the reservoir. In doing this, smooth transitions of both relative permeabilities and capillary pressures from drainage-to-imbibition or imbibition-to-drainage states are allowed. In addition, the effect of trapped gas or oil saturations on relative permeabilities and capillary pressures is accounted for. Data are presented in graphical, tabular, and equation form; hysteresis model is appended.
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