Stress analysis of a borehole in saturated rocks under in situ mechanical, hydrological and thermal interactions

J. C. Sheng, J. Liu, W. C. Zhu, D. Elsworth, J. X. Liu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A novel approach is developed to represent coupled thermal-hydraulic- mechanical (THM) behavior of porous systems that incorporates the non-isothermal free and forced convection of a single component fluid in a non-boiling thermoelastic medium. The three-way simultaneous coupling between the THM triplet is currently linear, but no restriction is placed on incorporating material nonlinearities. The coupled PDEs are solved in space by grid-adaptive finite elements. The model is validated against solutions for linear non-isothermal consolidation of a column. We demonstrate the utility of the model by analyzing the behavior of a deep wellbore in a themoelastic medium circulated by a pressurized, but chilled fluid. Model results illustrate the significant importance of the cross-couplings between individual THM processes for the evaluation of wellbore stability.

Original languageEnglish (US)
Pages (from-to)157-169
Number of pages13
JournalEnergy Sources, Part A: Recovery, Utilization and Environmental Effects
Volume30
Issue number2
DOIs
StatePublished - Jan 2008

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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