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Novel Variable Streamer Length Acquisition Tailored to Full Waveform Inversion and High Resolution Imaging

Summary The South-Western Barents Sea is characterized by a complex geology with a heterogeneous overburden. Different target depths add a further level of complexity to the design of the appropriate acquisition and imaging configuration that is required to image the subsurface accurately. Refraction based Full Waveform Inversion (FWI) has been widely used to create detailed velocity models in the Barents Sea. The maximum model depth that can be updated by using refracted energy is limited by recorded offsets. In this case study we show the advantage of a novel acquisition solution that combines a triple-source with a high density multisensor streamer spread and a variable cable length. We evaluate the effect of long offset data on FWI, show how the updates can be extended to greater depths, and demonstrate the high-density acquisition for high-resolution imaging.