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Type: Journal article
Title: A flexible true plurigaussian code for spatial facies simulations
Author: Xu, C.
Dowd, P.
Mardia, K.
Fowell, R.
Citation: Computers and Geosciences, 2006; 32(10):1629-1645
Publisher: Pergamon-Elsevier Science Ltd
Issue Date: 2006
ISSN: 0098-3004
Abstract: The current forms of plurigaussian simulation have serious limitations for applications to large numbers of geological facies, or units, which have complex contact relations. In this paper the authors present a true plurigaussian simulation (PGS) method, which can be applied in a simple way to any number of geological facies by using any number of Gaussians. A recursive technique is used for multi-dimensional integration of the Gaussian functions, which forms the major part of the PGS computation. A binary, dynamic contact matrix (DCM) is used to specify the contact relations among the facies; this method has proved to be simple, flexible and capable of dealing with general, complex contact relations. A method for incorporating into PGS multivariate correlations among any number of random variables is also included. A simulated example is used to demonstrate the application of the generalised PGS. This example shows that PGS is more robust to under-sampling than traditional direct indicator simulation.
Keywords: geostatistical simulation
plurigaussian simulation
spatial facieses simulation
spatial modelling
multivariate correlation
contact relations
dynamic contact matrix
recursive integration
DOI: 10.1016/j.cageo.2006.03.002
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Appears in Collections:Aurora harvest 6
Civil and Environmental Engineering publications

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