Noise Attenuation
Clearing out the clutter is vital. Geotrace’s powerful
noise attenuation techniques form the basis of
our successful land and marine preprocessing operations. We’ve
developed innovative, efficient methods to handle a multitude
of coherent and incoherent noises, including seismic interference,
swell noise, ground roll and more. These methods provide the best
of all possible worlds—eliminating troublesome noise while
retaining as much valuable information as possible.
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*Original code courtesy of BP |
Time
Frequency Domain (TFD)
This noise-rejection technique is based on a proprietary implementation
of the short Fourier transform technique. TFD allows for attenuation
of anomalous amplitude spikes, noise bursts, air blast, swell
noise, rig noise, pump noise, etc.
Wavelet Transform Filter (WTF)
This is a noise-rejection technique based on the discrete wavelet
transform. In this domain, severe low-frequency linear noises
contaminating the data can be separated and filtered.
3D FK
3D FK is a true three-dimensional frequency-wavenumber filter
originally developed for hybrid gathers. In the 3D FK space, data
is transformed to the (ω, kx, ky)
space using a conical operator. Great care is taken to avoid aliasing
and Gibbs effects.
3D
Radon
Using a true 3D Radon filter, which was originally
developed for hybrid gathers, 3D data (x, y, z) is transformed,
using the discrete Radon transform, into the (τ, px,
py) space. Filtering can be done in a Model/Pass or
Apply/Reject mode.
 A review of some Powerful Noise Elimination Techniques for Land Processing (Presented at EAGE, June 2007)
 Time Frequency Domain (TFD)
Wavelet Transform Filter (WTF)
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