Wavefield Decomposition of Ocean-Bottom Multicomponent Seismic Data with Composite Calibration Filters

Downgoing/upgoing P/S-wave decomposition of ocean-bottom seismic (OBS) multicomponent data can help suppress the water-layer multiples and cross-talks between P- S-waves, therefore plays an important role in migration construction S-wave velocity models. We proposed novel composite calibration filters by introducing additional dimension to particle components, extending wave-equation-based adaptive method. also modified existing workflow jointly using primary reflections at near-to-medium offsets refractions far optimization. The scheme with yielded satisfactory results a deep-water OBS field example. Expected effects, such as enhancement attenuation multiple events, be observed decomposed upgoing wavefields. An experiment illustrated effectiveness that compensated for unexpected errors along offset dimension.