--> Abstract: 3D Stratigraphic Modelling in Complex Tectonics Area; #90063 (2007)

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3D Stratigraphic Modelling in Complex Tectonics Area

 

Granjeon, Didier1, Sylvie Wolf2 (1) Institut Français du Pétrole, Rueil Malmaison, France (2) IFP, Rueil Malmaison, France

 

Thanks to the recent developments in geoscience tools, relationship between tectonics, sedimentation and petroleum systems can be investigated. This presentation is focused on these numerical models and in particular on the principles and use of Dionisos in integrated basin studies in complex tectonics area.

 

A Dionisos simulation is performed from the past up to the present taking into account three main geological « processes » : accommodation, supply and transport. The creation of accommodation is defined by eustatic sea-level variations and tectonic deformation, either purely vertical (thermal subsidence, sediment loading, ...), or more complex, induced by growth faults and salt diapirs. The supply of sediment may be a clastic inflow introduced into the basin by rivers, or a carbonate growth in marine environments controlled by water depth, wave energy and ecology. Finally, sediments may be transported through out the basin by long-term and short-term gravity processes (water-driven diffusion model), and reworked in nearshore environments by marine currents.

 

This stratigraphic model, and its link with basin model and uncertainty tools, are illustrated with an application on an active margin, where growth faults and sedimentary processes interact, and control reservoir and seal properties, but also overpressure. This application shows us that this link between structural, stratigraphic and basin models is a dreamed key to decipher the stratigraphic records in synkinematic series and better understand the source to sink systems, although great scientific effort still have to be put on their developments to close the process-deposit loop in complex tectonic settings.

 

AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California