Digitizing and reprocessing seismic archive data of the Geological Survey of the Netherlands for offshore windfarms
report
Offshore wind farms are an important energy source in the worlds current energy
transition toward a CO2 neutral energy system. For the development of offshore
windfarms in the North Sea a solid understanding of the geology and geotechnical
parameters of the uppermost 150 m of the seabed sediments is essential. The
Geological Survey of the Netherlands (TNO-GSN) has a significant archive with 2D
high resolution seismic data. By digitization and reprocessing, these data can be used for offshore windfarm planning. Using deconvolution, weighted trace mixing, frequency / band pass filtering and swell/heave filtering, the 2D seismic data can be improved. The enhanced data quality is such that reflection signal and causative shallow structures just below the seafloor become interpretable. The reprocessed 2D high resolution seismic data provides an initial impression of subsurface conditions in the windfarm areas, this data could be valuable input for geological desk studies and geophysical site surveys. A qualitative estimation of the data quality and uncertainty has also been added. In combination with borehole data and reprocessed 3D oil and gas exploration seismic data, these data can be used to map geological structures, characterize subsurface soil conditions and identify potential hazards for wind farm developments as previous studies by TNO-GSN have shown (Meijninger et al. 2021).
transition toward a CO2 neutral energy system. For the development of offshore
windfarms in the North Sea a solid understanding of the geology and geotechnical
parameters of the uppermost 150 m of the seabed sediments is essential. The
Geological Survey of the Netherlands (TNO-GSN) has a significant archive with 2D
high resolution seismic data. By digitization and reprocessing, these data can be used for offshore windfarm planning. Using deconvolution, weighted trace mixing, frequency / band pass filtering and swell/heave filtering, the 2D seismic data can be improved. The enhanced data quality is such that reflection signal and causative shallow structures just below the seafloor become interpretable. The reprocessed 2D high resolution seismic data provides an initial impression of subsurface conditions in the windfarm areas, this data could be valuable input for geological desk studies and geophysical site surveys. A qualitative estimation of the data quality and uncertainty has also been added. In combination with borehole data and reprocessed 3D oil and gas exploration seismic data, these data can be used to map geological structures, characterize subsurface soil conditions and identify potential hazards for wind farm developments as previous studies by TNO-GSN have shown (Meijninger et al. 2021).
Topics
TNO Identifier
968377
Publisher
TNO
Collation
49 p.
Place of publication
Utrecht