Facies classification is a challenging task in formation evaluation analysis and seismic reservoir characterization. The facies classification model is a key element in the reservoir modeling work flow because the distribution of rock and elastic properties as well as the petroelastic models between these properties changes from facies to facies, oftentimes with significant overlap.

Facies can be geologically defined based on sedimentology, stratigraphy, and core analysis. Then, the facies classification must be linked to the well-log data, such as petrophysical logs and computed parameters, in order to define a facies profile at the well location. Deterministic or statistical methods can...

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