Following two geothermal projects in Bleiswijk (for glashouses,1700 m depth) and the Hague (6000 houses), students of Delft University, Department of Applied Earth Sciences, started a feasibility study where casing drilling with composite pipe and CO2-injection are combined with the production of geothermal energy. An anticlinal structure is present below the campus, which holds the Jurassic aged Rijswijk and Delft highly permeable sandstone members at a depth between 1.8 and 2.4 km. This member can produce about 150 m3 of water per hour at 75°C. In urban environments, small operational footprints are essential for drilling a production- and a CO2- injection well (Fig.1a). By using new light-weight composite materials for wells with casing drilling technology, only small drilling rigs are required. The composite material is less susceptible to corrosion and enables co-injection of CO2 with the returning water (Wolf et al. 2007).


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