Well engineering and simulation for Non-Condensable Gases Total Reinjection systems
- Key words
- total reinjection, NCGs Injection, OLGA Injection Transient Modeling, high temperature resources, reservoir modelling
- Conference
- European Geothermal Congress
- Year
- 2016
- Session
- Technology and Best practice – Environmental Impact
- Language
- English
- Paper number
- T-EI-172
Full text
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Abstract
Magma Energy Italia aims to develop several geothermal projects in Tuscany (Italy) using “closed loop” power systems which include the total rejection of geothermal fluids.
Thermo-fluid dynamic modelling and wellbore engineering have been performed in the area of Castelnuovo and South-West Mensano in order to simulate the production and total reinjection in high temperature (>200 °C) and deep (> 3000 m) geothermal reservoir.
Several simulations have been carried out assuming multiple production/reinjection wells drilled from a single rig site adjacent to a small-sized (5-10 MWe) power plant. The reservoir simulations provided the main data for the design of 5 MWe “closed loop” generation capacity and indicated that temperature and NGCs breakthrough to the production wells from the injectors are negligible.
Moreover, OLGA multiphase simulations have been performed to demonstrate the feasibility of total reinjection of geothermal fluid (condensed steam and NCGs) in a single well, using specifically designed equipment.
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