Research progress of multi-azimuth acquisition and imaging technology of wide-tow multi-sources dual-sensor streamer

Wide-tow multi-sources dual-sensor streamer multi-azimuth acquisition and imaging technology has been successfully introduced into commercial seismic exploration projects. It improves the resolution of near-bottom strata and deep seismic images. This paper details this novel acquisition and imaging technique. This paper summarizes its application effect in the identification of near-seabed strata and deep target geological bodies in the North Sea, offshore Malaysia, the Barents Sea and other sea areas. The acquisition solution innovatively combines dual-sensor streamers, wide-tow multi-sources, and different length streamer arrangements with the new multi-azimuth acquisition. The Complete wavefield imaging combines reflection tomography, full waveform inversion (FWI), and separated wavefield imaging (SWIM). Its advantages mainly include: (1) Significantly weaken the influence of rough sea surface reflection and broaden the seismic frequency band. (2) Improve the signal-to-noise ratio, spatial sampling density, acquisition efficiency and velocity model accuracy. (3) Realize near offset uniform coverage and cost-effective multi-azimuth lighting. It can perform high-resolution imaging of near-seabed formations and deep geological targets, especially in shallow marine environmental conditions. It provides a cost-effective solution for imaging geological bodies at different depths.