What is the average size of a perforation? What is the average size of a cell in a static model? If we could be the size of the sun, would we be able to see an ant with naked eye? If we were the size of an atom could we watch television? All these questions have a common denominator, the scale. These simple considerations help us see the importance of scale in the systems we work with every day. Geology is not alien to this. All geological data and interpretations are scale-dependent. A very common geological element is the facies. The facies are the bricks with which the models are built. Litofacies, seismofacies, eletrofacies, etc. The facies are scale-dependent therefore also the models, up to a concordant surface is scale-dependent. There are many tools in geology. Today, sequence stratigraphy is one of the main those used to predict facies. The right use of these tool, it translates into a better handling of the uncertainty and quantificat...