Details
| Original language | English |
|---|---|
| Pages (from-to) | 2968-3004 |
| Number of pages | 37 |
| Journal | International Journal for Numerical and Analytical Methods in Geomechanics |
| Volume | 47 |
| Issue number | 16 |
| Early online date | 9 Aug 2023 |
| Publication status | Published - 8 Oct 2023 |
Abstract
A novel mixed enriched finite element model is developed for coupled non-linear thermo-hydro-mechanical simulation of fractured porous media with three-phase flow and thermal coupling. Simulation of induced acoustic emission (AE) and microseismic emission (ME) due to tensile fracturing and shear slip instability of pre-existing fracture interfaces is carried out and the numerical results of the emitted signals are analysed. The mathematical model is based on the generalized Biot's theory for coupled interaction of solid and fluid phases. A computationally robust non-linear solver is developed to handle the severe non-linearities arising from fluid saturations, relative permeabilities of fluids, constitutive models of interfaces and convective thermal coupling. To model pre-existing natural fractures and faults, discrete fracture propagation and nucleation of cracks (micro-cracking) independently of the original mesh topology, a local Partition-of-Unity (PU) finite element method, namely, the Phantom Node Method (PNM) is implemented. The cohesive fracture modelling scheme is implemented to account for the non-linear behaviour of fracturing and localization, and to rectify the non-physical stress singularity condition at the fracture tip. Effects of different system parameters on fracturing, shear-slip instability and the associated induced AEs and MEs are investigated through various numerical results.
Keywords
- acoustic emission, microseismic emission, multi-phase flow, porous media, thermo-hydro-mechanical coupling
ASJC Scopus subject areas
- Engineering(all)
- Computational Mechanics
- Materials Science(all)
- General Materials Science
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Engineering(all)
- Mechanics of Materials
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 47, No. 16, 08.10.2023, p. 2968-3004.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An enriched mixed finite element model for the simulation of microseismic and acoustic emissions in fractured porous media with multi-phase flow and thermal coupling
AU - Komijani, Mohammad
AU - Wriggers, Peter
AU - Goudarzi, Taha
N1 - Funding Information: The first and the second authors gratefully acknowledge the support of a Humboldt Research Fellowship from the Alexander von Humboldt Foundation of Germany.
PY - 2023/10/8
Y1 - 2023/10/8
N2 - A novel mixed enriched finite element model is developed for coupled non-linear thermo-hydro-mechanical simulation of fractured porous media with three-phase flow and thermal coupling. Simulation of induced acoustic emission (AE) and microseismic emission (ME) due to tensile fracturing and shear slip instability of pre-existing fracture interfaces is carried out and the numerical results of the emitted signals are analysed. The mathematical model is based on the generalized Biot's theory for coupled interaction of solid and fluid phases. A computationally robust non-linear solver is developed to handle the severe non-linearities arising from fluid saturations, relative permeabilities of fluids, constitutive models of interfaces and convective thermal coupling. To model pre-existing natural fractures and faults, discrete fracture propagation and nucleation of cracks (micro-cracking) independently of the original mesh topology, a local Partition-of-Unity (PU) finite element method, namely, the Phantom Node Method (PNM) is implemented. The cohesive fracture modelling scheme is implemented to account for the non-linear behaviour of fracturing and localization, and to rectify the non-physical stress singularity condition at the fracture tip. Effects of different system parameters on fracturing, shear-slip instability and the associated induced AEs and MEs are investigated through various numerical results.
AB - A novel mixed enriched finite element model is developed for coupled non-linear thermo-hydro-mechanical simulation of fractured porous media with three-phase flow and thermal coupling. Simulation of induced acoustic emission (AE) and microseismic emission (ME) due to tensile fracturing and shear slip instability of pre-existing fracture interfaces is carried out and the numerical results of the emitted signals are analysed. The mathematical model is based on the generalized Biot's theory for coupled interaction of solid and fluid phases. A computationally robust non-linear solver is developed to handle the severe non-linearities arising from fluid saturations, relative permeabilities of fluids, constitutive models of interfaces and convective thermal coupling. To model pre-existing natural fractures and faults, discrete fracture propagation and nucleation of cracks (micro-cracking) independently of the original mesh topology, a local Partition-of-Unity (PU) finite element method, namely, the Phantom Node Method (PNM) is implemented. The cohesive fracture modelling scheme is implemented to account for the non-linear behaviour of fracturing and localization, and to rectify the non-physical stress singularity condition at the fracture tip. Effects of different system parameters on fracturing, shear-slip instability and the associated induced AEs and MEs are investigated through various numerical results.
KW - acoustic emission
KW - microseismic emission
KW - multi-phase flow
KW - porous media
KW - thermo-hydro-mechanical coupling
UR - http://www.scopus.com/inward/record.url?scp=85167344494&partnerID=8YFLogxK
U2 - 10.1002/nag.3608
DO - 10.1002/nag.3608
M3 - Article
AN - SCOPUS:85167344494
VL - 47
SP - 2968
EP - 3004
JO - International Journal for Numerical and Analytical Methods in Geomechanics
JF - International Journal for Numerical and Analytical Methods in Geomechanics
SN - 0363-9061
IS - 16
ER -