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March 8, Geothermal Petrophysics
8th March 2018 @ 3:30 pm - 7:00 pm CET
Date & Time: March 8, 15:30-19:00 CET, KIVI Den Haag
Free entrance as usual.
Laboratory research efforts on geothermal engineering at TU Delft
Richard Bakker, TU Delft, The Netherlands
Responding to an increased demand for clean, green, carbon-neutral energy, the Dutch ministry of economic affairs signed a “Green Deal”, aimed to extract geothermal heat at depths below 4000 m which brings with it some new geotechnical challenges. A number of examples of current laboratory research at TU Delft will be shown including a deep porous sandstone and fractured reservoirs. In addition, research on Radial Jet Drilling (RJD) is presented. This technique is likely to provide better control on enhanced flow paths in geothermal settings. It requires less fluids compared to conventional hydraulic stimulation techniques, thereby reducing the risk of induced seismicity .
Dr. Richard Bakker is an experimental rock mechanics specialist working at the TU Delft rock mechanics laboratory within the Geothermal Engineering group of Prof. David Bruhn. He works as a Post-doc within the EC funded Horizon2020 project ‘SURE’, which focusses on Radial Jet Drilling (see: http://www.sure-h2020.eu/). He did his MSc at Utrecht university in Geology and Geophysics and wrote a thesis about paleomagnetism and uplift rates of the island of Timor, SE Asia. His PhD was at ETH Zürich in the Structural Geology group, where he worked on the mechanical properties of rocks in volcanic settings using a high pressure and temperature deformation apparatus (Paterson apparatus, max 1200 ˚C, 500 MPa). His thesis focused primarily on basalts and carbonates found in the basement of Mt. Etna.
Bart van Kempen, TNO, The Netherlands
Reservoir evaluation plays a major role in the exploration of geothermal reservoirs. The chance of success of a hydrocarbon prospect is dependent on the water saturation, while the most critical parameter in geothermal exploration is the transmissivity. In conventional reservoirs the net thickness is usually relatively easy to determine and the uncertainty will often be quite narrow. Reservoir permeability on the other side is one of the properties hardest to predict. Part of our work at TNO-AGE concerns calculating the expected geothermal power at various scales (national to local). As permeability and net reservoir thickness are the most critical factors in these calculations, we combine and compare all available data to improve estimates and reduce uncertainty. Multiple data sources and scales implies a certain complexity which will be highlighted and discussed in this presentation.
Bart has a background in geology, core analysis and petrophysics with well over 5 years experience. He is currently working for TNO-AGE, the advisory group for the Ministry of Economic Affairs and Climate (MEA) as cluster leader Geothermal energy. His technical work comprises geoscience work on geothermal related issues in support of compiling evaluation reports and advises to the MEA pertaining to: licence applications, financial support measures and policy support. His specialisation is, reservoir characterization of geothermal aquifers. Therefore, his work focuses on petrophysics, well testing interpretation and production evaluation.