Details
| Original language | English |
|---|---|
| Pages (from-to) | 2599-2618 |
| Number of pages | 20 |
| Journal | Acta Geotechnica |
| Volume | 15 |
| Issue number | 9 |
| Early online date | 20 Feb 2020 |
| Publication status | Published - Sept 2020 |
Abstract
This paper proposes a phase field model (PFM) for describing hydraulic fracture propagation in transversely isotopic media. The coupling between the fluid flow and displacement fields is established according to the classical Biot poroelasticity theory, while the phase field model characterizes the fracture behavior. The proposed method applies a transversely isotropic constitutive relationship between stress and strain as well as anisotropy in fracture toughness and permeability. We add an additional pressure-related term and an anisotropic fracture toughness tensor in the energy functional, which is then used to obtain the governing equations of strong form via the variational approach. In addition, the phase field is used to construct indicator functions that transit the fluid property from the intact domain to the fully fractured one. Moreover, the proposed PFM is implemented using the finite element method where a staggered scheme is applied to solve the displacement, fluid pressure, and phase field sequentially. Afterward, two examples are used to initially verify the proposed PFM: a transversely isotropic single-edge-notched square plate subjected to tension and an isotropic porous medium subjected to internal fluid pressure. Finally, numerical examples of 2D and 3D transversely isotropic media with one or two interior notches subjected to internal fluid pressure are presented to further prove the capability of the proposed PFM in 2D and 3D problems.
Keywords
- Fracture propagation, Hydraulic fracturing, Phase field model, Porous media, Staggered scheme, Transverse isotropy
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Earth and Planetary Sciences(all)
- Earth and Planetary Sciences (miscellaneous)
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In: Acta Geotechnica, Vol. 15, No. 9, 09.2020, p. 2599-2618.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phase field modeling of hydraulic fracture propagation in transversely isotropic poroelastic media
AU - Zhou, Shuwei
AU - Zhuang, Xiaoying
N1 - Funding Information: The authors gratefully acknowledge financial support provided by the Natural Science Foundation of China (51474157), and RISE-project BESTOFRAC (734370).
PY - 2020/9
Y1 - 2020/9
N2 - This paper proposes a phase field model (PFM) for describing hydraulic fracture propagation in transversely isotopic media. The coupling between the fluid flow and displacement fields is established according to the classical Biot poroelasticity theory, while the phase field model characterizes the fracture behavior. The proposed method applies a transversely isotropic constitutive relationship between stress and strain as well as anisotropy in fracture toughness and permeability. We add an additional pressure-related term and an anisotropic fracture toughness tensor in the energy functional, which is then used to obtain the governing equations of strong form via the variational approach. In addition, the phase field is used to construct indicator functions that transit the fluid property from the intact domain to the fully fractured one. Moreover, the proposed PFM is implemented using the finite element method where a staggered scheme is applied to solve the displacement, fluid pressure, and phase field sequentially. Afterward, two examples are used to initially verify the proposed PFM: a transversely isotropic single-edge-notched square plate subjected to tension and an isotropic porous medium subjected to internal fluid pressure. Finally, numerical examples of 2D and 3D transversely isotropic media with one or two interior notches subjected to internal fluid pressure are presented to further prove the capability of the proposed PFM in 2D and 3D problems.
AB - This paper proposes a phase field model (PFM) for describing hydraulic fracture propagation in transversely isotopic media. The coupling between the fluid flow and displacement fields is established according to the classical Biot poroelasticity theory, while the phase field model characterizes the fracture behavior. The proposed method applies a transversely isotropic constitutive relationship between stress and strain as well as anisotropy in fracture toughness and permeability. We add an additional pressure-related term and an anisotropic fracture toughness tensor in the energy functional, which is then used to obtain the governing equations of strong form via the variational approach. In addition, the phase field is used to construct indicator functions that transit the fluid property from the intact domain to the fully fractured one. Moreover, the proposed PFM is implemented using the finite element method where a staggered scheme is applied to solve the displacement, fluid pressure, and phase field sequentially. Afterward, two examples are used to initially verify the proposed PFM: a transversely isotropic single-edge-notched square plate subjected to tension and an isotropic porous medium subjected to internal fluid pressure. Finally, numerical examples of 2D and 3D transversely isotropic media with one or two interior notches subjected to internal fluid pressure are presented to further prove the capability of the proposed PFM in 2D and 3D problems.
KW - Fracture propagation
KW - Hydraulic fracturing
KW - Phase field model
KW - Porous media
KW - Staggered scheme
KW - Transverse isotropy
UR - http://www.scopus.com/inward/record.url?scp=85080936313&partnerID=8YFLogxK
U2 - 10.1007/s11440-020-00913-z
DO - 10.1007/s11440-020-00913-z
M3 - Article
AN - SCOPUS:85080936313
VL - 15
SP - 2599
EP - 2618
JO - Acta Geotechnica
JF - Acta Geotechnica
SN - 1861-1125
IS - 9
ER -