Velocity analysis of multicomponent seismic data of the Santos Basin using OBN technology and SWD technique

The multicomponent seismic presents a more complex wave field than the conventional seismic, for this reason it has been used in seismic survey. For the offshore situations, there is the necessity of use OBN (Ocean Bottom Nodes) technology to obtain S wave informations. These technologies generate nonhyperbolic events due to the ray trace asymmetry, resultant from the difference between the angle of incidence and angle of emergence (for wave conversion), and datum difference between source and receptor (for OBN technology). This kind of event is also found associated to the use of SWD (Seismic While Drilling) technology which is important to reach informations of ultra-deep reservoirs, where usually has informations with low amplitudes. The focus of this work is to perform the velocity analysis of converted wave events, acquired at different depths, following an inversion routine by an optimization criterion. Thus, it will be possible to infer if the method is applicable and understand its behavior.