A major source of the environmental perturbations that seriously affect marine seismic data quality and repeatability is the noise generated in streamers due to weather and sea conditions. Q-Marine records such noise with sufficient spatial fidelity to eliminate it using targeted filtering techniques. Unlike conventional noise suppression, this does not affect the signal bandwidth or fidelity. By reducing swell noise, high-quality seismic data can be recorded in poor weather, reducing overall survey acquisition time.
Solving ambient noise problems
Example (right) shows streamer noise on a shot record - optimally sampled and processed by Q-Marine. Also shown is an example of improvement in the low-frequency signal-to-noise ratio, providing for more accurate imaging and inversion from Q-Marine data.
Shot-generated noise can be a significant problem for seismic quality.
The figure below shows that mud-roll energy (A) can be significantly under-sampled and aliased (B) when acquired with a conventional system. The Q-Marine single-sensor sampling f-k plot shows un-aliased noise (C) for subsequent efficient removal. This also allows the high-frequency, higher angle signal to be revealed and preserved for subsequent processing and inversion.
