Bär, K. ; Strom, A. ; Reinsch, T. ; Sippel, J. ; Freymark, J. ; Mielke, P. ; Wiesner, P. (2016)
IMAGE petrophysical catalogue – an international database for reservoir characterization.
European Geothermal Congress. Strasbourg (20.09.2016-22.09.2016)
Konferenzveröffentlichung, Bibliographie

Kurzbeschreibung (Abstract)

Petrophysical rock properties are key to populate local and/or regional numerical models and for the interpretation of many geophysical investigation methods. To date, large numbers of datasets are available in numerous sources. This diversification often causes time-consuming literature research with often limited success due to unwanted generalization of the dataset. A lack of detailed information on the sample location, petrography, stratigraphy, measuring method and measurement conditions makes it difficult to use these data for specific locations or reservoir units. An open-access database is currently under development within the scope of the EC funded project IMAGE (Integrated Methods for Advanced Geothermal Exploration, grant agreement No. 608553). Similar to the World Stress Map (Heidbach et al. 2010), the IMAGE database aims at providing information on published data – here petrophysical properties – in one single compilation. The data-base is designed to allow for an easy access to data relevant for geothermal exploration and reservoir characterization. Collected data include petrophysical properties, thermophysical properties, mechanical properties, additionally electrical resistivity and magnetic susceptibility. Each data point or sample is identified by an unambiguous sample ID, based on the name of the first author of the original publication, the publication year and a running number. Furthermore, sample information like the type of sample location, geographic coordinates, elevation and sampling depth are documented and linked with the stratigraphy and an as detailed as possible petrographic description following a hierarchical petrographic catalogue for each sample. In addition, information on the experimental set-up of the different laboratory measurements are given for quality control. This also allows analyzing whether the properties are dependent on temperature, pressure or degree of saturation or type of saturating fluid and thus will enable the definition of specific parameters. Up to now, most of the data that entered the database are either from published data collections or from laboratory measurements performed at TU Darmstadt. So far, more than 38,000 data points from all over the world were collected. It is planned to set up a publicly accessible database through a web-based interface to allow external users and scientists to add own research data. Using this provided data and own measurements the web-based database will be updated continuously. The collected data will help researchers and users in the early stages of new geothermal projects to make a first assessment of the geothermal rock properties and can be used for the planning of future exploration and in areas where the existing data density is sufficient even for exploitation projects. Additionally, the database helps improving local and regional geoscientific models of many different purposes.

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