A script used to compute Constant Velocity Scans for velocity analysis.
You will also need the following script:
Constant Velocity Scans, NMO velocity increases from left to right. [scans.jpg]
We use Radon demultiple and the KL transform to eliminate
multiples from a NMO corrected gather.
Spiking deconvolution followed by phase rotation and band-pass filtering were applied to a small data set from the Western Canadian Basin.
The script should reproduce the following figures:
After spiking deconvolution we calculate the variation of the Kurtosis with phase rotation. We choose the phase correction that maximizes the kurtosis (Longbottom, J., Walden, A.T. and White, R.E., 1988, Principles and application of maximum kurtosis phase estimation, Geophysical Prospecting, 36, 115-138)
Spectra before and after spiking deconvolution and band-pass filtering.
From left to right: Original data, data after spiking deconvolution, data after spiking deconvolution followed by maximum kurtosis phase rotation and band-pass filtering
Signal Analysis and Imaging Group
Department of Physics, University of Alberta
Edmonton, AB, T6G 2G7, Canada
Phone: (780) 492-5034 Fax: (780) 492-0714