Sequence Stratigraphy, Depositional Environment and Numerical Stratigraphic Modelling of the Orphan Basin (NL, Canada)
P. Jermannaud, E. Le Guerroué, J. Pitz, T. Pichot, D. McCallum, I. Atkinson, V. Mitchell and R. Wright
Event name: 79th EAGE Conference and Exhibition 2017
Session: Sedimentary Case Studies (Dedicated Session)
Publication date: 12 June 2017
Info: Extended abstract, PDF ( 1.79Mb )
Price: € 20
A sequence stratigraphic analysis coupled with a 3D forward stratigraphic model was performed in the Orphan Basin (NL, Canada). It aimed at understanding the sedimentary and stratigraphic infill of the basin and to define potential plays. The basin sequence stratigraphic architecture was initially defined using two composite 2D seismic sections. This stratigraphic framework was then applied in 3D space using the complete seismic and well dataset to create eight (8) conceptual Gross Depositional Environment (GDE) maps. The conceptual GDE were then numerically tested using the 4D forward stratigraphic modelling tool DionisosFlow™. The model allowed the paleoenvironment interpretation to be greatly refined, and the lateral and vertical extension of potential reservoirs on the shelf margin and within large turbiditic complexes to be identified. Transgressive intervals were highlighted to be favorable to the deposition and preservation of organic-rich sediments. The 3D stratigraphic grid results were used to assess the exploration geological risk, considering reservoir/seal presence and effectiveness. Sand and shale distribution in the 3D stratigraphic model is available laterally and vertically in terms of Net sand, Net to Gross and as a minimum continuous thickness. Reservoir / seal couplets, defining plays, were risked (Common Risk Segment mapping) with accurate spatial definition.