GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 3.1 GNGTS 2023 Data repurposing for large-scale seabed characterization for windfarm planning in shallow marine environments D. Boiero 1 , M. Clementi 2 , C. Leone 2 , L. Masnaghetti 2 1 SLB, Crawley, UK 2 SLB, Milan, Italy The development of renewable energy resources in a marine environment needs to consider the seabed geological conditions that will control the safe development of seabed installations and cable corridors. In shallow marine environments, surface and guided waves present in ocean-bottom sensor and streamer seismic data acquired for deep exploration are considered a source of information that can be exploited by a variety of well-established geophysical solutions for characterizing the seabed (Boiero et al., 2013). The size and quality of legacy seismic datasets ( Figure 1 ) enable implementing robust workflows for processing surface waves, providing accurate estimates of their propagation properties with high lateral and vertical resolution, and effectively allow the repurposing of existing datasets originally targeting petroleum exploration to energy transition objectives. Figure 1: An example towed-streamer shot gather showing Scholte and guided P-waves. In this paper, we discuss a workflow for the analysis and joint inversion of surface and guided waves, and we list derived shallow parameters that can provide critical information to project proponents and regulators for the safe development of marine renewable energy. S-wave attributes are the most important parameters for foundation design, but also, V P can be used for imaging high-resolution reflection data and can be combined with V S for petrophysical classification (V P -V S ratio). Compressional velocity could also be resolved by exploiting the seismic