Source signature deconvolution method
AssigneeSchlumberger Technology Corporation
InventorsPhilip Christie, Zoe Lunnon
Life of this patent
Estimating the term…
Abstract
A method of filtering seismic signals is described using the steps of obtaining the seismic signals generated by activating a seismic source and recording signals emanating from the source at one or more receivers; defining a source signature deconvolution filter to filter the seismic signal, wherein the filter is scaled by a frequency-dependent term based on an estimate of the signal-to-noise (S/N) based on the spectral power of a signal common to a suite of angle-dependent far-field signatures normalized by the total spectral power of the signatures within the angular suite and performing a source signature deconvolution using the source signature deconvolution filter.
Claims14
A method of filtering seismic signals comprising the steps of
- obtaining the seismic signals generated by activating a seismic source;
- obtaining far-field source signature signals of the seismic source for a plurality of polar angles;
- defining a source signature deconvolution filter to filter the seismic signal, wherein the filter is weighted by a frequency-dependent weighting term being indicative of the signal-versus-noise content of source signature signals and being derived using two or more of the far-field source signature signals;
- and
- performing a source signature deconvolution using the source signature deconvolution filter.
Dependencies are inferred from the claim text.