Figure 1: High-resolution fault extraction visualises smallscale spatial changes in amplitude, frequency or phase content of 3D seismic data, and challenges perceptions of what can and can not be identified with seismic data. Comparison and calibration of seismic fault extractions with faults identified in wells (from e.g. core, image logs/dipmeter or log correlation) helps to ground-truth extractions and assess the true seismic fault resolution of a particular data set at objective level.