Publication Date:
2020-12-15
Description:
Sub-surface operations for energy production such as gas storage, fluid reinjection or hydraulic fracking may modify the
physical properties of the rocks, in particular the seismic velocity and the anelastic attenuation. The aim of the present study
is to investigate, through a synthetic test, the possibility of using empirical ground-motion prediction equations (GMPEs) to
observe the variations in the reservoir. In the synthetic test, we reproduce the expected seismic activity (in terms of rate, focal
mechanisms, stress drop and the b value of the Gutenberg-Richter) and the variation of medium properties in terms of the
quality factor Q induced by a fluid injection experiment. In practice, peak-ground velocity data of the simulated earthquakes
during the field operations are used to update the coefficients of a reference GMPE in order to test whether the coefficients are
able to capture the medium properties variation. The results of the test show that the coefficients of the GMPE vary during
the simulated field operations revealing their sensitivity to the variation of the anelastic attenuation. The proposed approach
is suggested as a promising tool that, if confirmed by real data analysis, could be used for monitoring and interpreting induced
seismicity in addition to more conventional techniques.
Description:
for Clean Energy) project,
which received funding from the European Union’s Horizon 2020
research and innovation action, under grant agreement No 764810,
and was partially funded by the PRIN Project MATISSE (Bando 2017,
Prot. 20177EPPN2).
Description:
Published
Description:
723–735
Description:
5T. Sismologia, geofisica e geologia per l'ingegneria sismica
Description:
JCR Journal
Keywords:
Induced seismicity
;
Anelastic attenuation
;
Ground motion predictive equations
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
