High Temperature Instruments for supercritical geothermal
reservoir characterization and exploitation GFZ Part in
Workpackage 4: Production integrity monitoring Within HITI, new
surface and downhole tools and approaches for deep high-
temperature boreholes are developed, built, and tested in the
field. The new set of tools and methods has been chosen to
provide a basic set of data needed to describe either the
supercritical reservoir structure and dynamics (measurement of
temperature, pressure, natural gamma radiation, electrical
resistivity, reservoir storativity, and acoustic imaging of the
borehole wall), and the evolution of the casing and cement
integrity during production (acoustic imaging). The new tools
will be tested in-situ in existing Icelandic wells, including
the IDDP (“Iceland Deep Drilling Project”) hole. Within
workpackage 4 “Production Integrity Monitoring”, GFZ contributes
its expertise in fiber-optic temperature monitoring, which is
further developed for the specific demands in high-temperat