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Time-Lapse Changes in Velocities at Patua Geothermal Fields Using Seismic Ambient Noise

Description: 

Geothermal resources and Enhanced Geothermal Systems (EGS) have the potential to provide clean energy, and the understanding of subsurface stress and strain changes becomes crucial for EGS operations. In this study, we analyze continuous recordings from five pairs of co-located surface and shallow-borehole seismometers deployed at the Patua Geothermal Field since June 2021. Patua is a conventional (non-EGS) geothermal field; however, a near-field EGS project is planned in an idle at the southern margin of the natural geothermal reservoir. The ambient-noise data recorded by this local array is used to detect time-lapse changes of subsurface velocities using coda-wave interferometry. Time-lapse changes in velocities provide a unique view of subsurface elastic changes between each receiver pair. We will jointly interpret the obtained time-lapse changes of subsurface velocities with observations from earthquakes, surface deformation (InSAR and GPS), and numerical modeling for characterizing subsurface stress and strain.

Session: De-risking Deep Geothermal Projects: Geophysical Monitoring and Forecast Modeling Advances [Poster]

Type: Poster

Date: 4/18/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: Hongrui Qiu

Student Presenter: No

Invited Presentation: 

Authors