Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band

Nhan T. Nguyen; Dat G. Phan; Terry Bennett; Ha H. Bui; Giang D. Nguyen; Murat Karakus

doi:10.1016/j.prostr.2023.05.013

Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band

Nhan T. Nguyen, Dat G. Phan, Terry Bennett, Ha H. Bui, Giang D. Nguyen, Murat Karakus

Civil & Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

4 Citations (Scopus)

Abstract

The localised failure of highly porous rocks usually involves the size-dependent responses governed by the presence of planar bands in the form of compaction bands under high confinements. Deformations inside these bands induced by grain crushing are much higher than the surrounding host rock, making the rock structure inhomogeneous. This post-localisation mechanism is not able to be correctly captured by classical constitutive models for rocks due to the assumption of homogeneous deformation. The inhomogeneous behaviour can be addressed by our mechanism-based constitutive model in this paper, accounting for properties of the mesoscale localisation bands. In this model, the inclination and thickness of compaction bands are taken into account in kinematic enrichments to connect elastic responses outside and inelastic responses based on breakage mechanics theory inside them. The potential of the proposed approach is presented through several numerical examples, using triaxial tests on rocks.

Original language	English
Title of host publication	17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022)
Publisher	Elsevier
Pages	52-59
Number of pages	8
Volume	45
DOIs	https://doi.org/10.1016/j.prostr.2023.05.013
Publication status	Published - 2023
Event	Asia-Pacific Conference on Fracture and Strength and the Conference on Structural Integrity and Failure 2022 - Hybrid, Adelaide, Australia Duration: 6 Dec 2022 → 9 Dec 2022 Conference number: 17th & 13th https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/45/suppl/C (Proceedings)

Publication series

Name	Procedia Structural Integrity
Publisher	Elsevier BV
ISSN (Print)	2452-3216

Conference

Conference	Asia-Pacific Conference on Fracture and Strength and the Conference on Structural Integrity and Failure 2022
Abbreviated title	APCFS 2022 & SIF 2022
Country/Territory	Australia
City	Adelaide
Period	6/12/22 → 9/12/22
Internet address	https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/45/suppl/C (Proceedings)

Keywords

breakage mechanics
compaction band
dual-scale framework
porous rock
strain localisation

Access to Document

10.1016/j.prostr.2023.05.013

529180357-oaFinal published version, 1 MB

Cite this

Nguyen, N. T., Phan, D. G., Bennett, T., Bui, H. H., Nguyen, G. D., & Karakus, M. (2023). Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band. In 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) (Vol. 45, pp. 52-59). (Procedia Structural Integrity). Elsevier. https://doi.org/10.1016/j.prostr.2023.05.013

Nguyen, Nhan T. ; Phan, Dat G. ; Bennett, Terry et al. / Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band. 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) . Vol. 45 Elsevier, 2023. pp. 52-59 (Procedia Structural Integrity).

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abstract = "The localised failure of highly porous rocks usually involves the size-dependent responses governed by the presence of planar bands in the form of compaction bands under high confinements. Deformations inside these bands induced by grain crushing are much higher than the surrounding host rock, making the rock structure inhomogeneous. This post-localisation mechanism is not able to be correctly captured by classical constitutive models for rocks due to the assumption of homogeneous deformation. The inhomogeneous behaviour can be addressed by our mechanism-based constitutive model in this paper, accounting for properties of the mesoscale localisation bands. In this model, the inclination and thickness of compaction bands are taken into account in kinematic enrichments to connect elastic responses outside and inelastic responses based on breakage mechanics theory inside them. The potential of the proposed approach is presented through several numerical examples, using triaxial tests on rocks.",

keywords = "breakage mechanics, compaction band, dual-scale framework, porous rock, strain localisation",

author = "Nguyen, {Nhan T.} and Phan, {Dat G.} and Terry Bennett and Bui, {Ha H.} and Nguyen, {Giang D.} and Murat Karakus",

note = "Funding Information: Support from the Australian Research Council (ARC) and OZ Minerals Ltd through Linkage Project LP200100038 is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2023 The Authors. Published by Elsevier B.V.; Asia-Pacific Conference on Fracture and Strength and the Conference on Structural Integrity and Failure 2022, APCFS 2022 & SIF 2022 ; Conference date: 06-12-2022 Through 09-12-2022",

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Nguyen, NT, Phan, DG, Bennett, T, Bui, HH, Nguyen, GD & Karakus, M 2023, Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band. in 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) . vol. 45, Procedia Structural Integrity, Elsevier, pp. 52-59, Asia-Pacific Conference on Fracture and Strength and the Conference on Structural Integrity and Failure 2022, Adelaide, South Australia, Australia, 6/12/22. https://doi.org/10.1016/j.prostr.2023.05.013

Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band. / Nguyen, Nhan T.; Phan, Dat G.; Bennett, Terry et al.
17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) . Vol. 45 Elsevier, 2023. p. 52-59 (Procedia Structural Integrity).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

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T1 - Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band

AU - Nguyen, Nhan T.

AU - Phan, Dat G.

AU - Bennett, Terry

AU - Bui, Ha H.

AU - Nguyen, Giang D.

AU - Karakus, Murat

N1 - Conference code: 17th & 13th

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N2 - The localised failure of highly porous rocks usually involves the size-dependent responses governed by the presence of planar bands in the form of compaction bands under high confinements. Deformations inside these bands induced by grain crushing are much higher than the surrounding host rock, making the rock structure inhomogeneous. This post-localisation mechanism is not able to be correctly captured by classical constitutive models for rocks due to the assumption of homogeneous deformation. The inhomogeneous behaviour can be addressed by our mechanism-based constitutive model in this paper, accounting for properties of the mesoscale localisation bands. In this model, the inclination and thickness of compaction bands are taken into account in kinematic enrichments to connect elastic responses outside and inelastic responses based on breakage mechanics theory inside them. The potential of the proposed approach is presented through several numerical examples, using triaxial tests on rocks.

AB - The localised failure of highly porous rocks usually involves the size-dependent responses governed by the presence of planar bands in the form of compaction bands under high confinements. Deformations inside these bands induced by grain crushing are much higher than the surrounding host rock, making the rock structure inhomogeneous. This post-localisation mechanism is not able to be correctly captured by classical constitutive models for rocks due to the assumption of homogeneous deformation. The inhomogeneous behaviour can be addressed by our mechanism-based constitutive model in this paper, accounting for properties of the mesoscale localisation bands. In this model, the inclination and thickness of compaction bands are taken into account in kinematic enrichments to connect elastic responses outside and inelastic responses based on breakage mechanics theory inside them. The potential of the proposed approach is presented through several numerical examples, using triaxial tests on rocks.

KW - breakage mechanics

KW - compaction band

KW - dual-scale framework

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KW - strain localisation

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BT - 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022)

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Y2 - 6 December 2022 through 9 December 2022

ER -

Nguyen NT, Phan DG, Bennett T, Bui HH, Nguyen GD, Karakus M. Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band. In 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) . Vol. 45. Elsevier. 2023. p. 52-59. (Procedia Structural Integrity). doi: 10.1016/j.prostr.2023.05.013

Modelling localised failure in porous reservoir rocks using a continuum model with an embedded localisation band

Abstract

Publication series

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Keywords

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