Mapping Locally Complex Geologic Units in Three Dimensions: The Multi-point Geostatistical Approach

…from the 2009 Three-Dimensional Geologic Mapping Workshop held by the Illinois State Geological Survey…

G. Phelps and A. Boucher

“Multi-point geostatistics offers a way to map locally complex geology in three dimensions. The resulting maps are not unique; rather, many alternative maps are created, each conforming to known geology and expected geologic unit shape. The maps can incorporate important geologic characteristics, such as a general change in unit orientation across a basin and vertical continuity between units. The alternative 3D geologic maps, when viewed together, provide estimates of the geologic variability of the region, and can lead directly to estimates of uncertainty for process models that are built upon the 3D geology, such as flow and transport models.”