Seismic cluster analysis is used to create seismic zones for use in flow simulators. Several analyst decisions are required during the cluster analysis and subsequent regionalization procedures. These decisions lead to different cluster groupings and seismic zones. The quality of the clusters is measured by the isolation ration. The isolation ration indicates how well defined and different clusters are from other clusters. The homogeneity of the final zones is a measure of the quality of the final seismic zones. Resolution is best achieved by avoiding very large zones that cross broad areas of the domain. The number of clusters, the choice of weighting matrices and the number of small zones to remove must be chosen to balance homogeneity of the seismic zones with resolution.
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