Synchronized Sources

SyncSourceTM blended acquisition for better efficiency, resolution & illumination

Synchronized Sources can be used to acquire data with denser shotpoint spacing without increasing acquisition time. This enables the acquisition of data with greater fold, smaller bins or longer records than would otherwise be possible, providing options for new geometries that can deliver better illumination or increased efficiency. SyncSource brings additional flexibility to design solutions to meet customer geophysical objectives in a cost-effective manner. 

Benefits

Vessel shooting
Synchronized sources enable efficient acquisition using geometries that would otherwise be too sparse in terms of shotpoint density or require a second pass of acquisition.
  
In the right conditions this technology increases shotpoint density without increasing acquisition time, enabling a wider variety of acquisition geometries to be designed to maximize efficiency, resolution or illumination, and making new innovative geometries possible.

Example Applications

Single-vessel NAZ acquisition

Single-vessel NAZ acquisition

Better Efficiency

- by increasing vessel speed without increasing shot interval or reducing record length.
- by increasing the crossline resolution of a sparse wide spread with the use of multiple sources.

Better Resolution

- by reducing shot interval and increasing trace density.

Better Illumination

- by increasing record length.

Dual-vessel NAZ acquisition

dual vessel NAZ SimSrc

Efficient longer offsets

- with the use of an extra source vessel. Delivers operational efficiency with a spread longer than any single spread by increasing the inline shot density of multi-source acquisition.

Efficient wider spread

- with the use of an extra source vessel. Delivers operational efficiency with an effective spread wider than any available single spread, without loss of fold of coverage or increasing bin size e.g.WidepassHD.


Multi-vessel WAZ acquisition

multi-vessel WAZ

Multi-vessel acquisition enables designs that significantly improve the offset-azimuth distribution of seismic data, but sequential shooting may reduce the trace density.
Synchronized source technology restores the shot density to achieve the necessary trace density for higher resolution and better S/N while preserving the improved illumination of multi-vessel design. This enables efficient full azimuth towed streamer acquisition with illumination and resolution comparable to nodes but at less cost.




Blended Acquisition

All proposed designs using blended acquisition technology are validated by our subsurface imaging experts on a case by case basis. Controlled synchronization of source firing is used to record overlapping shots with shorter time intervals than record lengths. It requires a carefully configured shooting strategy so that the arrival times of reflection data from two or more different sources is tuned to optimize the separation process (de-blending). The CGG fleet is fully equipped to perform this:

  • Blended acquisition mode is available in SeaProNav 4 navigation software on all CGG vessels.
  • It relies on continuous recording with shots being separated later (available with SEAL 428 on all CGG vessels)
  • The on-board QC flow is adaptable for all blended acquisition scenarios
    • No limitation on the number of vessels or sources
    • No limitation on the synchronized shooting sequence
    • Limitations depend on the source size and refill time required
  • The controlled source synchronized sequence necessary for successful de-blending is optimized by our Subsurface Imaging experts by integrating the specific survey conditions.

De-Blending

CGG has a large toolbox of de-blending techniques with wide experience of their use in different locations around the world. Some of these techniques have been commercially in use on blended seabed seismic data with great success for some time. The preferred de-blending technique depends on the data, quality, the complexity of the targets and the simultaneous source scenario implemented in acquisition. By consulting Subsurface Imaging prior to designing the survey, the distribution of the sources and their firing sequences are carefully chosen and the chances of successful de-blending are maximized.
deblending

Simultaneous Shooting for Sparse OBN 4D Surve...

Ross Haacke | Gary Hampson | Barbara Golebiowski
©2015 EAGE
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A deblending strategy using alternating const...

Gordon Poole | Damien Russier | Kent Stevens | Thomas Mensch...
©2014 SEG
Offshore - Tailored Acquisition Solutions

Tailored Acquisition Solutions

Acquisition tailored to your geological challenges, time or budgetary constraints. Innovative spread designs and imaging solutions for complex geologies or time-limited or difficult access.
Offshore - Complex Geology Solutions

Complex Geology Solutions

Tailored multi-vessel acquisition solutions can deliver enhanced illumination beneath complex geologies, with improved noise and multiple attenuation.
Offshore - Time-Critical Solutions

Time-Critical Solutions

When you need data quickly, for environmental, seasonal or business reasons, we have solutions to reduce the survey turnaround time.
Offshore - TopSeis

TopSeis

A next-generation marine acquisition solution for acquiring zero and near offsets to improve the imaging of shallow and intermediate targets.
Offshore - OBP

On-Board Processing

Advanced Processing Systems and experienced personnel enable intensive sequences to be performed on-board for truly fast-track datasets
Offshore - Multi-Source

Multi-Source

Add an extra source to increase efficiency without compromising quality, or to increase resolution without increasing acquisition turnaround time.
Offshore (Marine)

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