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Robust numerical implementation of a 3D rate‐dependent model for reservoir geomechanical simulations
Author(s) -
Isotton Giovanni,
Teatini Pietro,
Ferronato Massimiliano,
Janna Carlo,
Spiezia Nicolò,
Mantica Stefano,
Volonte Giorgio
Publication year - 2019
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.3000
Subject(s) - geotechnics , geomechanics , finite element method , geotechnical engineering , computer science , creep , mathematics , geology , engineering , structural engineering , materials science , composite material
Summary A 3D elasto‐plastic rate‐dependent model for rock mechanics is formulated and implemented into a Finite Element (FE) numerical code. The model is based on the approach proposed by Vermeer and Neher (A soft soil model that accounts for creep. In: Proceedings of the International Symposium “Beyond 2000 in Computational Geotechnics,” pages 249‐261, 1999). An original strain‐driven algorithm with an Inexact Newton iterative scheme is used to compute the state variables for a given strain increment.The model is validated against laboratory measurements, checked on a simplified test case, and used to simulate land subsidence due to groundwater and hydrocarbon production. The numerical results prove computationally effective and robust, thus allowing for the use of the model on real complex geological settings.