A program for 2D modeling (cross) correlogram tables using fast Fourier transform

An alternative to the traditional fitting of analytical correlogram models or of a linear model of coregionalization has been recently proposed. where by the conditions For permissibility of a set of (cross) correlogram tables are imposed on their Fourier transforms, that is on the corresponding set of(cross) spectrum tables. The resulting model is entirely non-parametric a nd consists of a set of permissible (cross) correlogram tables from which g ridded correlogram values can be read directly. This paper gives the suite of GSLIB-type programs to implement this correlogram modeling approach. Pre sentation of the program is backed by a case study using actual petroleum r eservoir data (porosity and seismic reflection energy). (C) 2001 Elsevier S cience Ltd. All rights reserved.