ThermoGIS - An integrated web-based information system for geothermal exploration and governmental decision support for M

The use of geothermal energy through implementation of low enthalpy geothermal production systems for both electricity and heating has been growing rapidly in Europe. Geothermal activities can take considerable advantage of a wealth of existing oil and gas data. It is a major challenge to put this data and derived subsurface structural, temperature, and flow property models available to the geothermal community and to facilitate in quantitative assessment of geothermal potential of targeted areas, for both heat and electricity production (EGS). In order to face this challenge, TNO has developed a public web-based 3D information system connected to a geothermal performance assessment tool. The public information system (thermoGIS) includes high resolution 3D geological models covering the complete onshore of the Netherlands, outlining key geothermal reservoirs and allowing to assess relevant parameters and underlying uncertainties therein. Users can obtain key reservoir parameters, and underlying uncertainties at any location and for any reservoir. In an automated workflow these parameters are fed into the performance assessment tool, in order to assess the probability of success to meet minimum requirements on key performance indicators. The use of the ThermoGIS will aid exploration business decisions and Dutch governmental institutions, law makers and insurance companies. © 2010, Society of Petroleum Engineers

Transferring responsibility of CO22 storage sites to the competent authority following site closure

The requirements for pre-qualii’ying a site for C02 storage are well developed. Less attention bas been paid to rehearsing and preparing for the transfer of responsibility of the storage site from the operator to a govemmental authority following closure of the site at the end of the injection period. This is not surprising because the industry is in its infancy and most effort has been focussed on working towards the early stages of the various projects. A procedure for complying to the regulatory requirements for the transport of responsibility in the CCS Directive bas been proposed, which consists of a chart with Site Closure Milestones and a traffic light system for treating irregularities in observed behaviour of the storage site, and accompanying criteria. The procedure was successfully tested on the K12-B C02 injection pilot. Conclusions have been drawn on the basis of several dry runs for reporting the requirements for transfer of responsibility including feedback from operators and regulator