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WiBand - Broadband Processing for Marine Streamer Data

Broadband solutions continue to gain acceptance and are fast becoming a requirement for marine towed streamer seismic surveys. Broadband solutions for deghosting and processing can either be applied to newly acquired seismic data or to existing data.

The benefit of deghosting is to recover a broader frequency spectrum, resulting in improved seismic resolution and clarity.  The key advantage of broadband processing workflows is to exploit this improved resolution and clarity to yield more robust inversions of the seismic data.

ION offers solutions for both broadband deghosting and processing through its WiBand broadband processing workflows.

The WiBand Advantage

WiBand deghosting and processing benefits both legacy and newly acquired data:

  • Legacy data – for existing seismic data, while the acquisition parameters are fixed, we can optimize the processing component to yield:
    • Improved high and low frequencies 
    • Better data for inversions after the removal of ghosts to properly account for Q during processing workflows
  • Newly acquired seismic data - our imaging team can optimize both the acquisition and processing parameters:
    • Achieving the benefits of broadband acquisition through conventional acquisition equipment
    • Recommending acquisition parameters to improve both the high and low frequency response
    • Better data for inversions after the removal of ghosts to properly account for Q during processing workflows

Source and receiver notches in the frequency spectrum resulting from free surface reflections (ghosts) have traditionally limited resolution in the marine environment.  By tackling both source and receiver ghosts (de-ghosting), our team can recover the full spectrum in acquired data. It is extremely important to be able to apply broadband solutions to conventional “flat” streamer data as the vast majority of legacy and new data is acquired using this configuration. In addition, removing the ghosts allows seismic vessels to tow their streamers deeper; thereby extending the weather window during seismic acquisition, and minimizing both project inefficiencies and acquisition costs.

Recovering the full bandwidth of the data through de-ghosting allows for more effective application of other processing techniques such as multiple attenuation, velocity model building, migration, and AVO. These WiBand processing workflows are not only necessary to signal processing required by a broader spectrum of frequencies, but also to optimize the data for inversions used to characterize rock and fluid properties.  Techniques such as full waveform inversion (FWI) can also be leveraged to build higher resolution velocity models leading to more accurate reservoir characterization. The result - decreased risk in seismic-driven drilling and field development decisions.

P-Impedance Comparison – Conventional vs. WiBand



P-impedance from WiBand processing with a reasonably good well-tie. Notice the consistencies in color between the well log and the section.  In addition, note the high impedance event becomes clearer and more consistent.
P-Impedance using WiBand


P-impedance from conventional processing with the inserted color column representing P-impedance at the wellbore.
P-Impedance using Conventional Processing
(Mouse over image to view Conventional Processing
or click to view a side-by-side comparison)

Seismic Inversion Comparison – Conventional vs. WiBand



This comparison shows a seismic inversion example of a 2D line from deepwater Australia together with a well tie. Note the better definition of the stratigraphy and improved well tie of the data processed with WiBand.
P-Impedance using WiBand


This comparison shows a seismic inversion example of a 2D line from deepwater Australia together with a well tie -  "the ground truth."
P-Impedance using Conventional Processing
(Mouse over image to view Conventional Processing
or click to view a side-by-side comparison)