Towards a better understanding of the evolution of sedimentary basins: coupling decompaction and volumetric restoration.

Pauline Durand-Riard and Lise Salles and Florian Basier and Guillaume Caumon. ( 2010 )
in: Proc. 30th Gocad Meeting, Nancy

Abstract

Basin studies call for analysing subsidence and compaction of sedimentary layers. Two main laws are commonly used to govern decompaction: the isostatic one, considering total compaction for each layer as a function of depth, and the elasto-plastic approach, which tries to model faithfully compaction phenomena. In parallel, for basin studies, balanced structural restoration is fundamental to assess deformation and burial history. In this work, we use previous Basier’s work which binds decompaction with sequential 3D geomechanical restoration, using restoration results as an input for the computation of the decompaction. Elasto-plastic decompaction being extremely underconstrained, we propose coupling sequential restoration with isostatic decompaction, which allows a continuous and time-optimized decompaction. Then we apply the proposed decompaction approach to the sand-rich turbiditic reservoir analog of Annot (SE France) and show the impact of decompaction on the understanding of the basin history.

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BibTeX Reference

@INPROCEEDINGS{DurandRiard2GM2010,
    author = { Durand-Riard, Pauline and Salles, Lise and Basier, Florian and Caumon, Guillaume },
     title = { Towards a better understanding of the evolution of sedimentary basins: coupling decompaction and volumetric restoration. },
 booktitle = { Proc. 30th Gocad Meeting, Nancy },
      year = { 2010 },
  abstract = { Basin studies call for analysing subsidence and compaction of sedimentary layers. Two main laws are commonly used to govern decompaction: the isostatic one, considering total compaction for each layer as a function of depth, and the elasto-plastic approach, which tries to model faithfully compaction phenomena. In parallel, for basin studies, balanced structural restoration is fundamental to assess deformation and burial history.
In this work, we use previous Basier’s work which binds decompaction with sequential 3D geomechanical restoration, using restoration results as an input for the computation of the decompaction. Elasto-plastic decompaction being extremely underconstrained, we propose coupling sequential restoration with isostatic decompaction, which allows a continuous and time-optimized decompaction. Then we apply the proposed decompaction approach to the sand-rich turbiditic reservoir analog of Annot (SE France) and show the impact of decompaction on the understanding of the basin history. }
}