Sentinel Solid Streamers
The CGG marine seismic fleet has the largest deployment of Sercel Seal Sentinel® solid streamers in the industry. These streamers are recognized for their low-noise properties and low frequency recording capabilities, providing better signal penetration and benefitting sub-salt, sub-basalt and deep target imaging.
Sentinel is the quietest marine streamer available to-day, with a design that reduces noise and drag. Sentinel is the streamer of choice for consistency, reliability, high signal-to-noise ratio and low frequency recording.
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The CGG fleet has the largest deployment of solid streamers in the industry |
Solid streamers have been proven in environmentally sensitive frontier areas |
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Features |
Benefits |
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Low Noise
In the Sercel Sentinel solid streamer there is a single stress member at the core, isolated from the hydrophone by the PU foam. In fluid or gel streamers the hydrophone is at the core, and is coupled to the strain members. This means that solid streamers do not suffer from towing and environmental noise. This lower noise floor provides a better signal-to-noise ratio at low frequencies, allowing the use of lower low-cut filters.
The amplitude map (below) clearly shows that the solid streamer is much quieter than the fluid-filled streamer in marginal weather.
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Amplitude map showing swell noise in a hybrid streamer using a solid front and a liquid tail section in marginal weather |
