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VSP to Delineate Magmatic Bodies, Supercritical Fluids, Superheated Steam within Krafla Geothermal Field, NE-IcelandNormal access

Authors: F. Kästner, S. Halldórsdóttir, G.P. Hersir, S. Planke, R. Giese, K. Gunnarsson, A. Gudmundsson, E. Juliusson and Ó.G. Flóvenz
Event name: 3rd EAGE Workshop on Borehole Geophysics
Session: Posters
Publication date: 19 April 2015
DOI: 10.3997/2214-4609.201412214
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.78Mb )
Price: € 20

A VSP test experiment at the high temperature geothermal field Krafla in Iceland has been carried out. In two boreholes a zero-, far- and moving-source VSP has been applied to delineate subsurface fracture sets, zones of supercritical fluids, superheated steam and zones of magma with the background of a magmatic, high temperature and high attenuating basement. A careful preparation and evaluation of the survey is needed in order to provide a high resolution image of the surrounding subsurface. Under such special conditions high-quality three component data have been recorded and will grant a good basis for further processing and imaging techniques. It can be assumed that VSP techniques will provide a good alternative and addition to hitherto only applied surface seismic, teleseismic or microseismic procedures.

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