Geothermal reservoir monitoring
The Mannvit team strongly recommends developing a monitoring program for routine investigations indicating early-stage negative developments of a geothermal reservoir. Recommendations include the monitoring of the microbiological, geochemical and petrologic aspects of the reservoir to guarantee safe and long-term operation of the plant.

Management of geothermal reservoir models:
Once geothermal reservoir models have been established and applied for predictions of reservoir behavior, they must be maintained for future predictions and management purposes. The models are maintained with updated data as acquired through the project lifetime.

Monitoring of geothermal reservoirs, includes:

• Temperature
• Pressure
• Production
• Chemistry
• Dissolution and precipitation of minerals,partly in connection with microbial activity as a consequence of concentration, temperature and pressure changes
• Transport and rearrangement of dissolved minerals and particles caused by high flow rates, corrosion of plant components (casings, etc.) produced or supported by microbial activity

Project example:
The Mannvit team member GTN provides Stadtwerke Neubrandenburg (seat of the German Parliament) with reservoir management and monitoring for an underground cold and heat storage system.  In this example, the operational reliability of aquifer stores may be affected by the following processes:

• Dissolution and precipitation of minerals, partly in connection with microbial activity as a consequence of concentration, Temperature and pressure changes
• Transport and rearrangement of dissolved minerals and particles caused by high flow rates
• Corrosion of plant components (casings, etc.) produced or supported by microbial activity