Truncated Gaussian Simulation

Cut One Field Into Bands

Truncated Gaussian simulation builds facies from a single continuous Gaussian field: simulate the field once, then cut it at threshold levels so the lowest values become one facies, the next band the next facies, and so on. It is pixel-based, so it conditions to wells and to proportions readily.

Proportions and Ordering

Because the cut levels are read from the field's own distribution, the global proportions come out exactly on target. And because every facies is a band of the same smooth field, the facies are ordered: you move from shale to sand to channel axis and back, never jumping from shale straight to axis. The widget shows axis cores always wrapped in sand.

When Ordering Fits

That ordering is the method's signature strength and its limitation. It is ideal for gradational sequences where facies really do grade in order, such as a prograding shoreface or a fining-upward channel, and wrong for facies with no natural order, where forcing sand between every shale and axis would be false. Match the method to the geology.