Calcite deposition at Miravalles geothermal field, Costa Rica
- Instituto Costarricense de Electricidad, San Jose (Costa Rica)
The calcite deposition problem at Miravalles has been studied since it was observed in the first three wells drilled on the slopes of the Miravalles Volcano. Long-term tests have been carried out to study reservoir characteristics. The change in the production behavior of the wells with the restriction imposed by the deposited calcite has been studied trying to evaluate and quantify the scaling problem. Work is being done on predictions of the deposition rate, location and distribution of the deposited mineral inside the wells. This work was compared with real data obtained from caliper logs of the wells before and after production. The feasibility of the first 55 MW power plant has been demonstrated. It was considered that the solution for the calcite problem is the reaming during discharge of the wells trying at the same time to minimize the cleaning interventions with a new well design. It is believed, due to the thermodynamics and chemical characteristics of the extracted fluids, that it is possible to find a non-deposition zone which will permit the drilling of wells without a scaling problem.
- OSTI ID:
- 5322967
- Journal Information:
- Geothermics; (USA), Vol. 18:1; ISSN 0375-6505
- Country of Publication:
- United States
- Language:
- English
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Preliminary reservoir engineering studies of the Miravalles geothermal field, Costa Rica
Preliminary reservoir engineering studies of the Miravalles geothermal field, Costa Rica
Related Subjects
CALCITE
DEPOSITION
COSTA RICA
GEOTHERMAL FIELDS
SCALING
GEOTHERMAL WELLS
THERMODYNAMICS
CHEMICAL REACTIONS
DESIGN
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CENTRAL AMERICA
DEVELOPING COUNTRIES
LATIN AMERICA
MINERALS
OXYGEN COMPOUNDS
WELLS
150903* - Geothermal Engineering- Corrosion
Scaling & Materials Development
150904 - Geothermal Engineering- Geothermal Reservoir & Well Performance
152001 - Geothermal Data & Theory- Properties of Aqueous Solutions