By A. Strub (auth.), A. S. Strub, P. Ungemach (eds.)
The first concern in power costs was once certainly a powerful stimulus for the involvement of the fee of the ecu groups in examine and improvement on substitute power resources. certainly, the necessity to conquer problems confronted by means of the neighborhood as a complete, really these as a result of its critically unbalanced strength provide, made a typical group strategy appear in particular apt. This reasoning additionally applies to strength R&D, taking into account that responses to the difficulty might be not just political or financial, but in addition medical. 4 years have handed because the selection of the Council of Ministers to release the 1st group power study and improvement Programme, facing geothermal strength, solar power, hydrogen creation and utili sation, strength conservation and effort structures research. A seminar on geo thermal strength was once held years in the past to record on paintings in growth on the half-way level of the four-year programme. the second one foreign seminar, mentioned during this quantity, used to be arrang ed with a purpose to provide a chance to ascertain the ultimate consequence of this group funding in examine in geothermal strength. This complaints quantity for this reason has major goals: - to give an evaluate of the result of the group geothermal programme, by way of eighty three formal experiences describing the person examine programmes; - to teach how the neighborhood examine programme suits into the final context of nationwide and foreign examine on geothermal power, through together with the displays of six visitor audio system who brought the periods and gave keynote addresses.
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Additional info for Advances in European Geothermal Research: Proceedings of the Second International Seminar on the Results of EC Geothermal Energy Research, held in Strasbourg, 4–6 March 1980
The use of seismic noise is certainLy one of the most controversiaL methods, for it is difficuLt to distinguish,in the frequency bands now used, between noise of cLimatic or human origian and noise from a geothermaL source or a source which is presumed to be geothermaL in the absence of a cLearLy recognizabLe signature. Noise directivity and aneLastic attenuation studies have not succeeded in removing this basic ambiguity from deep earth uproar. - 23- One of the criticisms of our first programme was that the projects and the geophysical themes were too widespread, and that very few, paradoxically, were situated in recognized hot zones, when one of the aims of the programme was precisely the sensitivity of detection methods to high temperatures.
C) a technology which uses explosives to pretreat the rock so that full potential hydraulic fracturing can be achieved. The strong anisotropy of the mechanical stresses resulting from the discontinuities in the rock can be overcome by developing the self-propped radial fracture array; independently of the stress field close to the well. Reservoir specialists would call this a strong negative skin effect zone from which hydraulic fracturing would send out fractures in the hope that the natural discontinuities in the rock could be re-opened and interconnected.
In areas where direct geological information is rare, the existing geophysical data have been used to outline the tectonics and to ascertain the interpolation between the bore holes. 000 concerning the four main water hearing formations : the Rauracian-Sequanian, the Great Oolite, the upper Muschelkalk and the Bundsandstein, for which : depth, thickness, lithology and tectonics are presented on 8 maps and 7 cross sections. 2. Geothermal caracteristics : Though more than 300 fluid test measurements are available, most of them come from 200 oil bore holes drilled before 1960.
Advances in European Geothermal Research: Proceedings of the Second International Seminar on the Results of EC Geothermal Energy Research, held in Strasbourg, 4–6 March 1980 by A. Strub (auth.), A. S. Strub, P. Ungemach (eds.)