Property Model QC

Trust, but Verify

A property realization is only useful if it kept the geology that went in, and three checks decide that. It must reproduce the input histogram, reproduce the input variogram, and honor the wells exactly. QC overlays the realization on each target so any drift shows immediately.

The Three Checks

The histogram check confirms the realization has the right proportion of high and low values, not a distribution the simulator drifted into. The variogram check confirms the spatial continuity, the range and the sill, survived. The well check confirms the hard data were honored: the value at each well cell equals the measured value. The widget shows all three holding across different realizations.

When QC Fails

A realization that fails these has quietly lost the input: too smooth a variogram means lost heterogeneity, a shifted histogram means biased volumes, an unhonored well means the model contradicts the data. QC is not a formality; it is the gate between a model that encodes the geology and one that only looks plausible. Pass it for every realization before using the ensemble.