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A flexible sequential Gaussian simulation program: USGSIM
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DOI：10.1016/j.cageo.2011.08.013.png)
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Abstract
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Sequential Gaussian simulation is a widely used algorithm for the stochastic characterization of properties from various earth science disciplines. Many variants have been developed to deal with the increasing complexity of modeling applications. The program described in this paper is a flexible, tested, and documented implementation. Multiple variables can be cosimulated within different rock types simultaneously. The stepwise transform is integrated into the program as are collocated cokriging, collocated cokriging with the intrinsic model, and cokriging with a linear model of coregionalization for the cosimulation of multiple variables. Multiple secondary data can be incorporated using locally varying means, collocated cokriging, and Bayesian updating. The search options and other parameters are flexible within rock types. Fortran source code and a compiled executable are provided. (C) 2011 Elsevier Ltd. All rights reserved.
Keywords:
Geostatistics
Cokriging
Multivariate
Soft data
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