Previously, Distinct Element (DE) models of the Cooper Basin were produced that compared basin scale DE model predictions with field observed rotational stress data in an attempt to validate the model (Morelli & Hunt 2006, Morelli et al. 2006). This work provided information on the relative strength of faults, which enabled the risk of fault reactivation to be determined. The work was also used to predict the stress variability across the region for future drilling operations. Previously, stress rotation data had only been available from image logs of individual wells once they had been drilled which was found to correlate poorly with stress rotation data away from the well.