3D chronostratigraphic coordinate system based on geomechanical restoration

Gautier Laurent, Guillaume Caumon, Mark Jessell, Jean Jacques Royer

Research output: Chapter in Book/Conference paperConference paper

Abstract

Defining distance is crucial for modeling geological properties with geostatistics. However, geological structures are generally deformed, making the present-day Euclidean distance inappropriate for applying geostatistics. Considering this, chronostratigraphic coordinate system maps geological models into a regular chronostratigraphic space, where deformations (especially those due to both faults and folds) have been removed (Mallet, 2004). Three curvilinear coordinates are used for this mapping, among which a time coordinate, inspired from H. E. Wheeler's work (1958), and two paleogeographic coordinates corresponding to the location of each particle at deposition time. To-date, chronostratigraphic coordinate system has been implemented by Moyen and Mallet (2004), Jayr et al. (2008), as a global optimization method which computes the three coordinates from chronostratigraphic interpretations. In this work, we propose instead to use sequential geomechanical restoration to compute paleogeographic coordinates. Geomechanical restoration is a way to infer the original position of a horizon taking rock physics into account. Each layer is restored into depositional state, which provides the paleogeographic coordinates of its hanging wall. Two methods have been proposed for propagating the coordinates within the layer Doing so, it is possible to capitalize on restoration efforts to build a chronostratigraphic coordinate system, not only dependent on geometric criteria but also on rock rheology and on the deformation path inferred from the sedimentary record.

Original languageEnglish
Title of host publicationIAMG 2010 Budapest - 14th Annual Conference of the International Association for Mathematical Geosciences
PublisherWECO Travel Ltd
ISBN (Print)9789630698290
Publication statusPublished - 1 Jan 2010
Externally publishedYes
Event14th Annual Conference of the International Association for Mathematical Geosciences, IAMG 2010 - Budapest, Hungary
Duration: 29 Aug 20102 Sep 2010

Conference

Conference14th Annual Conference of the International Association for Mathematical Geosciences, IAMG 2010
CountryHungary
CityBudapest
Period29/08/102/09/10

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