A comparative study of four geostatistical methods for identifying the hydraulic conductivity fields based on test data

Based on Geostatistical Software Library(GSLIB),the spatial variability of the hydraulic conductivity fields is examined by using the Kriging and conditional simulation of geostatistics,from which the standardized exponential model fits the test data got from the aquifer in MMR.Cell declustering,dealting with the outliers and normal score transformation,are used because they provide robust variograms.Then we get geometric anisotropy nested structure in 3D to the test data.Further,we adopt ordinary Kriging,indicator Kriging,sequential Gaussian simulation and sequential indicator simulation separately to interpolation and conditional simulation.Finally,the results are statistically analyzed and estimated with the specific geological conditions.