Advances in the development of geostatistics and object modeling, have allowed the construction of numeric representations of the Zone 1 interval, Ivishak Formation, Prudhoe Bay Field, that retain the character of the porosity / permeability seen in conventional core data. Modeling of the distribution of imbibition capillary pressure forces associated with these heterogeneous distributions was accomplished via the conventional Leverett J-Function.1  Subsequent water / oil fluid flow simulation, has revealed the effect of capillary forces on recoveries to waterflood.

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