Evaluating coupled hydraulic-mechanical behavior in the slate geothermal reservoir using discrete element analysis

C. H. Peng, M. C. Weng, H. K. Le, W. J. Shiu, P. L. Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Taiwan is rich in geothermal energy, which mainly distributes in the slate area. Due to the high anisotropy and heterogeneity of slate, the properties of rock mass are quite different from isotropic rock. This study conducted a discrete element analysis to evaluate the damage area of hydraulic stimulation in the slate for the operation of a geothermal power plant. A failure criterion for slate incorporated with a transversely isotropic model was established to describe the behavior of slate. The developed model was validated using a benchmark problem of geothermal techniques under an isotropic condition. The analysis results indicated that anisotropy significantly affects stress and strain distributions. The proposed model was further applied to analyze the injection response in a slate geothermal site. The analysis results revealed that the proposed model could reasonably simulate the anisotropic coupled hydro-mechanical behavior of slate geothermal reservoirs.

Original languageEnglish
Title of host publication57th US Rock Mechanics/Geomechanics Symposium
PublisherAmerican Rock Mechanics Association (ARMA)
ISBN (Electronic)9780979497582
DOIs
StatePublished - 2023
Event57th US Rock Mechanics/Geomechanics Symposium - Atlanta, United States
Duration: 25 Jun 202328 Jun 2023

Publication series

Name57th US Rock Mechanics/Geomechanics Symposium

Conference

Conference57th US Rock Mechanics/Geomechanics Symposium
Country/TerritoryUnited States
CityAtlanta
Period25/06/2328/06/23

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