Paleo-bathymetric controls on the stratigraphic architecture and reservoir development of confined fans in the Auger Basin:central Gulf of Mexico slope

摘要

With abundant well penetrations in proximal and distal settings and 3D seismic coverage,the Auger Basin is an ideal location to study the influence of basin setting and accommodation on the stratigrtaphic architecture of ancient turbidite systems.Pliocene-age trubiditesa t Macaroni Field were deposited in ponded accommodation in the distal portion of a salt-bounded intraslope basin,immediately inboared of a sediment spill point to the linked outboard basin.Deposits at Auger Field are contained within point-sourced submarine fans deposited in healed slope accommodation in the more proximal portion of the basin on the flank of a paleo-bathymetric ridge,immediately down depositional dip of a sediment spill point from an inboard basin.Both areas of the basin are distinct in terms of sediment dispersal patterns,rate of sediment fill,and preservation potential of reservoir/seal pairs,and while both fields contain sand-rich deposits and record vertical evolution from older sheet domianted-to younger channel dominated deposites over the Late Pliocene section,there are key differences in the nature in which the fill occurs.