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dc.contributor.authorJi, Yinlinen_US
dc.contributor.authorWanniarachchi, Wanniarachchillage Ayal Manethen_US
dc.contributor.authorWu, Weien_US
dc.identifier.citationJi, Y., Wanniarachchi, W. A. M. & Wu, W. (2020). Effect of fluid pressure heterogeneity on injection-induced fracture activation. Computers and Geotechnics, 123, 103589-.
dc.description.abstractThis study aims to understand the development of fluid pressure heterogeneity in a rock fracture and its influence on the injection-induced activation of the fracture. We first conduct injection-driven shear tests on a sawcut fracture close to a critical stress state using a triaxial shear-flow setup. The injection and monitoring pressures during the fluid injection are measured until the fracture is activated. We then use COMSOL multiphysics software to recover the fluid pressure distribution on the fracture based on the experimental data. When the degree of fluid pressure heterogeneity is low, the increase in fluid pressure on the fracture is nearly uniform, and the fluid pressure at fracture failure can be well predicted by the Mohr-Coulomb failure criterion. However, when the fluid pressure is highly heterogeneous, fracture rupture can be induced in the area with highly pressurized fluid, and propagates to activate the entire fracture. The fluid pressure at fracture failure is much higher than the predicted pressure, and increases with higher degree of fluid pressure heterogeneity.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.relation.ispartofComputers and Geotechnicsen_US
dc.rights© 2020 Elsevier Ltd. All rights reserved.en_US
dc.subjectEngineering::Civil engineeringen_US
dc.titleEffect of fluid pressure heterogeneity on injection-induced fracture activationen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.subject.keywordsRock Fractureen_US
dc.subject.keywordsFluid Pressure Heterogeneityen_US
dc.description.acknowledgementWei Wu gratefully acknowledges the support of Start-Up Grant from Nanyang Technological University, Singapore.en_US
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