Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.geothermics.2021.102334
Volltext Akzeptiertes Manuskript
Titel (primär) Wellbore stability in high-temperature granite under true triaxial stress
Autor Goto, R.; Sakaguchi, K.; Parisio, F.; Yoshioka, K.; Pramudyo, E.; Watanabe, N.
Quelle Geothermics
Erscheinungsjahr 2022
Department ENVINF
Band/Volume 100
Seite von art. 102334
Sprache englisch
Topic T8 Georesources
Keywords Wellbore failure; Granite; High temperature; Supercritical geothermal environment; Superhot geothermal environment; True triaxial stress; AE; acoustic emissions
Abstract Supercritical/superhot geothermal success depends on successful drilling. However, wellbore stability in supercritical environments has not been investigated because imposing sufficient stress on high-temperature granite with true triaxial loading is difficult. We conducted wellbore failure experiments on 200–450 °C granite under true triaxial stress, including deformation and acoustic emission measurements, and post-experiment thin section observations. Wellbore failure initiated at stress states consistent with existing brittle failure criterion at the studied temperatures. Using breakout geometry for in situ stress estimation may be difficult as shear failure propagation is suppressed at high temperatures; however, boreholes may be inherently stable in high-temperature environments.
dauerhafte UFZ-Verlinkung
Goto, R., Sakaguchi, K., Parisio, F., Yoshioka, K., Pramudyo, E., Watanabe, N. (2022):
Wellbore stability in high-temperature granite under true triaxial stress
Geothermics 100 , art. 102334 10.1016/j.geothermics.2021.102334