Benefits of multi-sensor streamers for broadband acquisition

Vector-acoustic full-waveform inversion (VAFWI) directly inverts vector-acoustic (VA) data, which consist of pressure and particle displacement components, at the cost of conventional acoustic full-waveform inversion (FWI). VA data contain information about the direction of arrival of the recorded seismic waves. In VAFWI, this directional information is taken into account by introducing an appropriate data weighting. With this weighting, in the geometry of a marine seismic experiment, the VAFWI adjoint calculation approximates inverse wavefield extrapolation, resulting in the natural separation of up- and downgoing recorded waves. If the free-surface effects are modeled during the inversion, the wave separation leads to (1) suppression of surface-related artifacts, (2) constructive interference of receiver ghosts with their primaries leading to preservation of the low-frequency content in the adjoint fields, and (3) compensation for insufficient spatial wavefield sampling on the receiver side. The horizontal displacement component helps interpolate the missing data. Synthetic examples demonstrate that for undersampled data, VAFWI consistently recovers the subsurface properties with higher resolution and fewer artifacts than conventional FWI.

show abstract

Characterization and simulation of transverse noise waves of a multisensor solid streamer

Smirnov

Sourice²,

Ribette³

et al. 2022

Second International Meeting for Applied Geoscience &Amp; Energy

View full text Add to dashboard Cite

Multi-sensor streamers have many advantages over traditional hydrophone-only streamers. In particular, they provide a measure of the pressure gradient which allows for data driven only broadband de-ghosting. This results in an improved subsurface image and allow the streamer to be towed deeper, reducing noise and operational downtime. However, the use of particle motion sensors is limited due to strong vibration noise waves they are subjected to.In this article a detailed characterization of these waves is proposed. Reviewing the classical model of the propagation of transverse waves, a new model of their propagation velocity is obtained. This one allows to explain the velocity difference observed on field data between the waves that go down and up the streamer. A simple attenuation model is proposed to estimate their amplitude decay as they propagate along the streamer. Knowing these new characteristics, a simulation of these waves is performed that matches the real data with high accuracy.

show abstract

Benefits of multi-sensor streamers for broadband acquisition

Cited by 3 publications

References 0 publications

Key equipment for marine and seabed acquisition fulfill new trends

Key equipment for marine and seabed acquisition fulfill new trends

Vector-acoustic full-waveform inversion: Taking advantage of wavefield separation and dealiasing

Characterization and simulation of transverse noise waves of a multisensor solid streamer

Contact Info

Product

Resources

About