Multi-scale simulation of rock compaction through breakage models with microstructure evolution

Giuseppe Buscarnera*, Yanni Chen, Joseoó Lizaoórraga, Ruiguo Zhang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Regional subsidence due to fluid depletion includes the interaction among multiple physical processes. Specifically, rock compaction is governed by coupled hydro-mechanical feedbacks involving fluid flow, effective stress change and pore collapse. Although poroelastic models are often used to explain the delay between depletion and subsidence, recent evidence indicates that inelastic effects could alter the rock microstructure, thus exacerbating coupling effects. Here, a constitutive law built within the framework of Breakage Mechanics is proposed to account for the inherent connection between rock microstructure, hydraulic conductivity, and pore compaction. Furthermore, it is embedded into a 1-D hydromechanical coupled finite element analysis (FEA) to explore the effects of micro-structure rearrangement on the development of reservoir compaction. Numerical examples with the proposed model are compared with simulations under constant hydraulic conductivity to illustrate the model capability to capture the non-linear processes of reservoir compaction induced by fluid depletion.

Original languageEnglish (US)
Pages (from-to)421-425
Number of pages5
JournalProceedings of the International Association of Hydrological Sciences
Volume382
DOIs
StatePublished - Apr 22 2020
Event10th International Symposium on Land Subsidence, TISOLS 2020 - Delft, Netherlands
Duration: May 17 2021May 21 2021

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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