RESULTS OF EC RESEARCH AND DEMONSTRATION PROJECTS IN THE FIELD OF GEOTHERMAL ENERGY
The second R&D programme is subdivided in the following sectors: A. Integrated geological, geophysical and geochemical investigations in selected areas. B. Subsurface problems of natural hydrothermal resources. C. Surface problems related to the use of hydrothermal resources. D. Hot Dry Rocks. The search for geothermal resources is progressing well in all Member States. New fields have been discovered in Belgium, Denmark, France, Germany, Italy, the United Kingdom, and recently a promising high enthalpy field has been identified at Nisyros (Dodecanese, Greece). Prospecting methods (volcano-tectonics, geophysics, geochemistry) have progressed to produce a more realistic appraisal of the reliable application of geochemical and exotic geophysical techniques to geothermal objectives, and to formulating useful conceptual models of geothermal settings. Reservoir physics, production engineering and technology is an area in which research to date has failed to solve the many problems associated particularly with high enthalpy liquid dominated and low enthalpy fine structure reservoirs. Nevertheless, during the second programme considerable progress has been made in these areas, though frequently with the identification of further problems. Resource utilisation has focussed on the implementation of processes and engines designed to extent utilisation of geothermal sources and fluids towards lower temperatures (heating) and medium enthalpy hot and saline brines (power generation). As far as heating is concerned the present programme has achieved its objectives. The environmental impact of geothermal exploitation in terms of induced seismicity has been investigated on two Italian fields and has provided the data base for modelling the seismic risk for a wide spectrum of in-situ stresses and tectonic conditions.
Bibliographic Reference: EUR 8853 EN (1984) FS, 784 P., BFR 1700, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989122035200 / Last updated on: 1987-01-01
Available languages: en