Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1029/2020GL089886
Licence creative commons licence
Title (Primary) Modeling fluid reinjection into an enhanced geothermal system
Author Parisio, F.; Yoshioka, K.
Journal Geophysical Research Letters
Year 2020
Department ENVINF
Volume 47
Issue 19
Page From e2020GL089886
Language 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.
Persistent UFZ Identifier
Parisio, F., Yoshioka, K. (2020):
Modeling fluid reinjection into an enhanced geothermal system
Geophys. Res. Lett. 47 (19), e2020GL089886