1887

Abstract

Summary

This paper presents a novel method to compute a watertight geological model directly from seismic data. Whereas existing workflows rely on complex process based on a few horizons and faults, the approach is based on a grid made of numerous horizon patches and a set of faults. Spatial resolution of the grid depends on the patch size and the vertical resolution relies on the seismic trace extrema. A chronostratigraphic ordering is done using the Relative Geological Time approach (Pauget et al, 2009). Based on this grid, 2D watertight geological models are created along seismic lines, sampled at a regular step in the inline and crossline directions, by defining stratigraphic units without limitation. A 3D triangular meshing is then performed by synchronising the relative geological times between intersecting 2D models. Therefore this method creates watertight models with higher level of accuracy and directly from the seismic data. It provides an interactive, fast and robust workflow where any change of the interpretation is applied directly on the model. It then allows extracting fault polygons, characterize sealing properties. Moreover, geocellular grid could be generated for reservoir simulation applications.

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/content/papers/10.3997/2214-4609.201701145
2017-06-12
2024-03-29
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References

  1. LacazeS., PaugetF., LopezM., GayA., MangueM.
    [2011] Seismic Stratigraphic Interpretation from a Geological Model — A North Sea case Study. SEG Annual Meeting.
    [Google Scholar]
  2. Lepage, F., and Souche, L.
    [2014] Geologic Model via Implicit function. US 2014/0222403 A1.
    [Google Scholar]
  3. Mallet, J-L.
    [2004] Space-Time Mathematical Framework for Sedimentary Geology. Journal of Mathematical Geology, 36, 1–32.
    [Google Scholar]
  4. Pauget, F., Lacaze, S., and Valding, T.
    , [2009] A global approach to seismic interpretation base on cost function and minimization. SEG, Expanded Abstract, 28, no. 1, 2592–2596.
    [Google Scholar]
  5. PaugetF.
    [2016] Procede de fabrication d’un modèle géologique vectoriel. Provisional Patent Application FR 16 59725.
    [Google Scholar]
  6. Poudret, M., Bennis, C., Dumont, C, Lerat, O., Rainaud, J.F.
    [2012] New flattening-based methodology for more accurate geostatistical reservoir populating. SPE/EUROPEC EAGE.
    [Google Scholar]
  7. Rainaud, J.F., Clochard, V., Crabié, T. and Borouchaki, H.
    [2015] Using a ChronoStratigraphic Unfolding Workflow to build an a priori model for Stratigraphic Inversion with accurate Horizon and Fault Fitting. SEG Technical Program Expanded Abstracts, p. 1927–1931.
    [Google Scholar]
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