To Bleed-Off or Not to Bleed-Off?
Bleed-off and shut-in of injection have been implemented in different Enhanced Geothermal Systems (EGS) in an attempt to mitigate the induced seismicity at and after the injection stop. This article tackles the controversial discussion on the mitigation of the post-injection induced seismicity throu...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/374098 |
| Acceso en línea: | http://hdl.handle.net/10261/374098 https://api.elsevier.com/content/abstract/scopus_id/85210757980 |
| Access Level: | acceso abierto |
| Palabra clave: | Induced seismicity Bleed-off EGS Precipitation zones http://metadata.un.org/sdg/7 Ensure access to affordable, reliable, sustainable and modern energy for all |
| Sumario: | Bleed-off and shut-in of injection have been implemented in different Enhanced Geothermal Systems (EGS) in an attempt to mitigate the induced seismicity at and after the injection stop. This article tackles the controversial discussion on the mitigation of the post-injection induced seismicity through ending fluid injection by either a bleed-off or a shut-in. Both scenarios failed to mitigate the occurrence of large magnitude earthquake after stopping injection in numerous EGS. The two protocols are compared by using a seismological forecasting methodology coupled with a hydro-mechanical model reproducing flow, poroelastic stress and fault failure in a domain including a discrete fault network based on Basel EGS (Switzerland, 2006). Unlike bleed-off, shut-in mitigates early post-injection seismicity by smoothly reducing pressure, and consequently poroelastic stress changes in the modelled Basel EGS. Although post-injection pore pressure diffusion eventually reaches distant faults and destabilizes them, seismi |
|---|