Site selection for the well IDDP-1 at Krafla

•Selection of drill site for the IDDP-1 well at Krafla in NE-Iceland.•Superheated and supercritical reservoir conditions.•MT-resistivity survey, seismic data and information from production well K-36.

This paper describes the site selection for the IDDP-1 well within the Krafla volcano in 2008. In a feasibility study in 2003, 12 potential well sites within three geothermal areas were suggested and prioritized to meet the goal of finding supercritical temperatures and pressures together with high permeability. In 2006 one of these priority sites was selected within the Krafla field, but in autumn 2007 due to its proximity to the Krafla power plant a new location had to be selected only a few months before drilling. Choice of that new site was justified by new MT-resistivity survey data, seismic data and information from an earlier nearby production well, K-36.