Predominantly, reservoir characterization techniques involved the traditional layer-cake models, which are known to be simplistic for complex sedimentologic environments. One of the Oxy operated fields presented a problem in accounting for the heterogeneity of its reservoir. Limitations posed by the conventional models prompted the search for newer methods in order to describe this reservoir more accurately. With the help of the leading integrated geostatistical package that offered stochastic modeling Options, the new full-fledged reservoir model was successfully built. Unlike its deterministic predecessor, it demonstrated an increased flexibility in accounting for the heterogeneities in the field. The strength of the geostatistical software is in its ways of dealing with uncertainty. The software is based upon the Boolean technique that allows for building a reservoir model created from objects that have some genetic significance rather than the model being built up one elementary node at a time.