Monitoring of CO2 injection operations

The SUCCEED team will be working on monitoring the CO2 injection operations, site performance and reservoir behaviour at the Kizildere and Hellisheidi sites.

This will provide information on the changes in field parameters and in geochemistry and geomechanics of the geothermal field, as well as the fate of the CO2 plume. They will use different, site-adjusted surface and downhole monitoring activities.

Besides the application of standard monitoring technologies the team will develop and use new and innovative seismic monitoring techniques and hardware (electric seismic-vibrator; iDAS system).

Project activities

Led by the Istituto Nazionale di Oceanografia e di Geofisica Sperimentale and assisted by Delft University of Technology, the SUCCEED team will monitor layer-specific information of subsurface changes at regular times from active- and passive-source measurements at both of the pilot sites.

Using this data and the surrent state of the CO2-enhanced geothermal production the team hope to further calibrate the dynamic reservoir model and to evaluate the performance of CO2 injection in terms of pressure support and production enhancement in the geothermal system

The work is split into five areas:

  1.  Conventional monitoring of well instrumentation and downhole pressure and temperature measurements, fluid sampling, tracer breakthrough before, during, after the proposed CO2 injection period.
  2. Development and field implementation of repeatable electric seismic-vibrator (EM) for semi-continuous seismic monitoring.
  3. Validation of high-dynamic range fibre-optic acoustic sensing system (iDAS) system for semi-continuous seismic monitoring.
  4. Processing seismic monitoring data and interpretation using the EM and iDAS systems.
  5. Microseismic data processing at the Hellisheidi site for the potential of injection induced seismicity.