SMOOTHING OF STAIR-STEPPED GEOMETRY IN GRIDS

摘要

Smoothing stair-stepped geometry in grids is described. An example system modifies grid cells in a geologic grid model to convert a stair-stepped approximation of a geologic feature into a smooth representation of the geologic feature. The system determines approximately horizontal segments within a stair-stepped pattern that are intersected by the true surface of the geologic feature as defined by model data. The system then extends approximately vertical segments between intersected horizontal segments to the nearest cell boundaries. Cell nodes defining the endpoints of these extended vertical segments are then repositioned to the true surface of the geologic feature, while horizontal segments are collapsed. Pillars of the grid model are shifted in various beneficial ways to accommodate the repositioned nodes. The basic fabric and structure of a grid model is preserved while geologic features that are usually modeled with a stair-stepped approximation can be modeled as smooth lines in the grid model.