Application of predictive modelling to the Lower Cretaceous sedimentary sequences of the central Scotian Basin

Abstract

Forward stratigraphic modelling of the central Scotian Basin is used to evaluate proposed provenance pathways in the Early Cretaceous and exploration risk. Modelling results confirm proposed pathways, supporting the diversion of the Sable and Banquereau rivers during the formation of the Naskapi Member, as well as likely episodic diversions during the Albian. Stratigraphic modelling techniques and petrographic studies predict the distribution of potential reservoir intervals and the influence of diagenesis on detrital minerals. Sand is dominantly trapped on the shelf in all units, with preferential accumulation in salt minibasins along the slope and shallow basin, and bypass to the deep basin. Simulation of feldspar grains and the presence of faulting and high permeability lithofacies suggest a zone of low risk to exploration on the shelf of the western and central Scotian Basin, and one of moderate risk in the eastern Scotian Basin.