A series of simulation runs was conducted for different geostatistical
ly derived cross-sectional models to study the degree of heterogeneity
required for proper modeling of steamfloods in a thick, heavy-oil res
ervoir with thin diatomite barriers. Different methods for coarsening
the most detailed models were applied, and performance predictions for
the coarsened and detailed models compared. Use of a general scaleup
method provided the most accurate coarse grid models.