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Granjeon, Didier1, Peter Burgess2, Henne Lammers2, Cees van Oosterhout2, Kees van der Zwan2, Remi Eschard1, Philippe Joseph1
(1) Institut Francais du Petrole, 92852 Rueil Malmaison Cedex, France
(2) Shell International E&P Research & Technical Services, 2288 GD Rijswijk, Netherlands

ABSTRACT: Use of 3D stratigraphic forward modelling to reduce reservoir and trap uncertainty

3D stratigraphic modelling is a powerful technology used at an exploration and appraisal scale to reduce uncertainty in reservoir, source rock and seal prediction, and at the production scale to predict probable inter-well reservoir properties.
A stratigraphic forward simulation is performed from the past up to the present in a sequence of stratigraphic time steps. At each time step, three main parameters are taken into account: (1) accommodation created by tectonic subsidence and eustasy, (2) sediment supply and (3) transport of sediments. In this study we present the principles and application of Dionisos, which is a stratigraphic forward model developed by IFP and a consortium of companies including Total, Shell, Repsol-YPF, Chevron-Texaco, Petrobras, ENI and IMP. In Dionisos, the supply of sediment may be a fluvial clastic input or in-situ carbonate production, which is linked to bathymetry, wave energy and ecological parameters (e.g. competition between species). The transport of sediment is simulated using deterministic equations to reproduce long-term, short-term and catastrophic processes. Using this set of deterministic equations, Dionisos reproduces the basin stratigraphic evolution, from continental to deep-marine settings, and generates a constrained 4D numerical model of the sedimentary basin infill.
Dionisos has been applied in Shell to various subsurface challenges, e.g. carbonate systems in the Middle East and SE Asia, and Cenozoic deltas on the Atlantic margins, and plays an important role in helping to assess and reduce subsurface uncertainty.


AAPG Search and Discovery Article #90026©2004 AAPG Annual Meeting, Dallas, Texas, April 18-21, 2004.