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Improved
Techniques of 
Stratigraphic
Modeling Controlled by
Seismic Data: Application to the National Petroleum Reserve,
Albouy, Emily, Jean-Marie Laigle, Marie-Christine Cacas, Institut Français du Pétrole, Rueil Malmaison Cedex, France
In petroleum exploration, the dense to very dense information on
geometries and textures provided by the analysis of 2D and 3D seismic data is
counterbalanced by the sparse nature of the of multi-1D data concerning lithology and depositional environment furnished by wells. Stratigraphic modelling, based on
approximation of the physical laws controlling the transport and deposition of
sedimentary rocks, can allow a more intelligent use of well data to predict the
facies and reservoir quality of identified structural
leads, source rock quality and distribution, and seal rock composition.
The elaboration of a valid stratigraphic
model generally requires the time-consuming construction and calibration of
multiple accommodation maps, coupled with trial–and–error evaluation of clastic supply and / or carbonate production parameters and
the sediment transport efficiency. This procedure is rarely integrated as
routine in exploration.
New algorithms have been developed to allow rapid, automatic
determination of optimal supply, transport and production parameters and
accommodation maps presenting an optimal fit to the geometries and thicknesses
of sedimentary sequences observed on seismic data. Seismic textural attributes
can be used as additional control points improving the determination of
depositional environments in areas where there is no well control.
This new
methodology has been applied to the data of the National Petroleum Reserve, interpretation of stratigraphic
surfaces on the seismic data, the stratigraphic modelling algorithms allow the construction and validation
of a stratigraphic
model describing the lithological content and depositional environment of the
substratum.