Coupling 3D Geomechanics to Classical Sedimentary Basin Modeling: From Gravitational Compaction to Tectonics

Autor: D. Colombo, A. Brüch, T. Cornu, C. Gout, M. C. Cacas-Stentz, J. Berthelon, J. Frey
Přispěvatelé: IFP Energies nouvelles (IFPEN), TOTAL PAU
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Effective stress
Constitutive equation
0211 other engineering and technologies
Compaction
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
02 engineering and technology
Structural basin
010502 geochemistry & geophysics
Coupled Geomechanics
01 natural sciences
Physics::Geophysics
Geomechanics
Geotechnical engineering
Sedimentary Basin
Computers in Earth Sciences
Poro-Elastoplasticity
Safety
Risk
Reliability and Quality
Physics::Atmospheric and Oceanic Physics
021101 geological & geomatics engineering
0105 earth and related environmental sciences
geography
geography.geographical_feature_category
Tectonics
Sedimentary basin
Geotechnical Engineering and Engineering Geology
Overpressure
Finite Element Method. 1 Introduction
Basin modelling
[SDE]Environmental Sciences
Geology
Mechanical Compaction
Zdroj: Geomechanics for Energy and the Environment
Geomechanics for Energy and the Environment, Elsevier, 2021, 28, pp.100259. ⟨10.1016/j.gete.2021.100259⟩
ISSN: 2352-3808
DOI: 10.1016/j.gete.2021.100259⟩
Popis: International audience; Classical sedimentary basin simulators account for simplified geomechanical models that describe material compaction by means of phenomenological laws relating porosity to vertical effective stress. In order to overcome this limitation and to deal with a comprehensive poromechanical framework, an iterative coupling scheme between a basin modeling code and a mechanical finite element code is adopted. This work focuses on the porous material constitutive law specifically devised to couple 3D geomechanics to basin modeling. The sediment material is considered as an isotropic fully saturated poro-elastoplastic medium undergoing large irreversible strains. Special attention is given to the development of a hardening law capable of reproducing the same porosity evolution as provided by the standard basin simulator when the sediment material is submitted to gravitational compaction under oedometric conditions. A synthetic case is used to illustrate the ability of the proposed workflow to integrate horizontal deformations in the basin model as such effects cannot be captured by the simplified geomechanics of the standard basin code. The results obtained by the coupled simulation demonstrate that horizontal compression may significantly contribute to overpressure development and brittle failure of the basin seal rocks, highlighting the importance of a coupled approach to simulate complex tectonic history.
Databáze: OpenAIRE
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