Geological History of the Southern Margin of the West Netherlands Basin - The Geothermal Energy Perspective

The Dutch Westland area, situated in the onshore part of the West Netherlands Basin, is of interest for geothermal energy exploration because good geothermal reservoirs are present in the Late Jurassic to Early Cretaceous deposits, and a high demand for hot water exists from the numerous greenhouses in the area. This study aimed to provide a better regional understanding of the Late Jurassic to Early Cretaceous tectonic history of the West Netherlands Basin, in particular regarding reservoir distribution and the possible influence of early tectonic structures on the deposition of reservoir sands. In addition, detailed knowledge of the fault pattern is important for the placement of geothermal wells. Detailed seismic mapping combined with stratigraphic cross-sections enabled a study of the distribution and development of geothermal reservoirs within the Alblasserdam, Delft Sandstone and the Berkel Sandstone Members. By flattening seismic cross-sections at several mapped horizons, the pre-inversion geometry of the basin was reconstructed. In addition, seismic attribute analyses have significantly improved the mapping of the faults and may illustrate depositional patterns within the Berkel Sandstone Member. The revealed tectonic history and reservoir distribution aid to accurately plan and execute geothermal wells.