Swell noise attenuation

Uses a proprietary multi pass-band amplitude discriminating technique.

 

F/K domain muting

Employs tapered fan or polygon muting.

 

tau-p domain hyperbolic velocity muting

Employs a tapered elliptical mute corresponding to minimum likely moveout velocity to reduce long offset multiple and noise.

 

F/X domain spatial deconvolution

Uses Wiener Levinson (least squares) or L2 norm adaptive predictive filters to remove random noise from NMO corrected CMP gathers and shot records and from common offset sections or stacked data.

 

Coherency filter

Weights pre- or post-stack traces in a frequency dependent manner according to the signal power estimated from windowed cross spectra.

 

Eigenvector filter

Uses the Kahrunen–Loeve transform to decompose stacked data into eigenimages that are selectively removed to reduce incoherent noise energy. Can be used to reduce flattened residual multiple from stacked data.

 

Dip-scan stack

Enhances events pre and post-stack via semblance weighting of the local linear tau-p transform.

 

Diversity stack

Reduces noise in stack traces by scaling input by gated trace amplitude or power. Can also be used to suppress high amplitude residual multiple.