Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1029/2020GL089886
Lizenz creative commons licence
Titel (primär) Modeling fluid reinjection into an enhanced geothermal system
Autor Parisio, F.; Yoshioka, K.
Quelle Geophysical Research Letters
Erscheinungsjahr 2020
Department ENVINF
Band/Volume 47
Heft 19
Seite von e2020GL089886
Sprache englisch
Abstract The manuscript analyzes the stimulation for an Enhanced Geothermal System development in Acoculco, Mexico. Using an analytical penny‐shape hydraulic fracture model covering different propagation regimes, we computed the final fracture length and width by varying fluid properties with temperature. Our analysis indicates that for the given scenario, the fluid viscosity plays a minor role and instead flow rate and time of the stimulation are the controlling variables. We computed the fracture re‐opening as a consequence of water re‐injection in the second stage of the stimulation through numerical computations based on the enriched discontinuity method. The computation shows that a single isolated fracture will not provide sufficient permeability, as the continuous injection will quickly fill and pressurize the crack. We demonstrate that the fracture needs to be connected to a permeable network to avoid excessive pressurization and achieve a commercially exploitable reservoir for Enhanced Geothermal System.
dauerhafte UFZ-Verlinkung
Parisio, F., Yoshioka, K. (2020):
Modeling fluid reinjection into an enhanced geothermal system
Geophys. Res. Lett. 47 (19), e2020GL089886 10.1029/2020GL089886