Abstract
This chapter describes how to calculate experimental variograms for the facies indicators and how to fit models to them. The relationship between the facies indicators and the underlying gaussian values has been given in Chap. 2. In this chapter we will give the variogram equations in the case when we only have constraints on facies but no other categorical variable or continuous function in the data set. The theoretical relation linking the variograms of the underlying gaussians and those of the indicators is described. From this link we use a specific fitting method: rather than invert it, we use an indirect iterative procedure to fit a variogram model. But first, we show how to calculate the experimental variograms for the facies indicators.
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© 2011 Springer-Verlag Berlin Heidelberg
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Armstrong, M. et al. (2011). Variograms and Structural Analysis. In: Plurigaussian Simulations in Geosciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19607-2_6
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DOI: https://doi.org/10.1007/978-3-642-19607-2_6
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-19606-5
Online ISBN: 978-3-642-19607-2
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