Broadband imaging of conventional data
The source and receiver ghosts created in conventional acquisition form a secondary wavefield that corrupts the recorded data, and whose appearance depends on offset, time and geologic dip.
We use two different approaches to deal with this secondary wavefield: one is to eliminate it - Ghost Wavefield Elimination, the other is to process and image it correctly, by mirror migration and joint deconvolution - Ghost Wavefield Imaging, and make use of the double illumination, as in BroadSeisTM.
Conventional processing and broadband deghosting processing of legacy flat streamer data
Ghost Wavefield Elimination:
- Upgrades conventional legacy data to the appearance of broadband data to aid matching.
- Broadens the bandwidth to provide sharper wavelets and improve visibility of impedance contrasts for enhanced interpretation.
- Compensates for ghosts present in flat streamer data, within the constraints of the poor signal-to-noise ratio at low frequencies and in the ghost notches.
- True broadband data requires all frequencies to be recorded with good signal-to-noise so that all ghost notches can be properly removed, providing improved resolution and inversion results.
We provide a number of different processing algorithms and techniques for Ghost Wavefield Elimination (GWE), to deghost and broaden the bandwidth of legacy flat streamer data. The optimal technique to use depends on the dataset and the objectives.