Mitigating Sparse Acquisition Limitations with FWI Imaging for Shallow Hazard Detection in Suriname

Summary Dedicated high-resolution site surveys are required before drilling when available seismic data do not meet the requirements for shallow hazard (SHAZ) assessment. In this study, we consider a dataset from a conventional 3D towed streamer acquisition, designed for deep target imaging, and we analyze the potential of Full Waveform Inversion (FWI) to image the near surface for shallow hazard purposes. FWI imaging demonstrate that by increasing the maximum frequency to 80Hz, existing conventional 3D data can be used for SHAZ purpose. FWI image eases the delineation of gas pockets while its associated velocity enables to distinguish consolidated from non-consolidated near surface layers.