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US 6,556,922 B2Granted
Non-stationary filter design and application for seismic signals
AssigneeConoco Inc.
InventorPhil Anno
Life of this patent
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AssigneeConoco Inc.
InventorPhil Anno
Estimating the term…
A method of designing and applying filters for geophysical time series data comprising obtaining a plurality of spatially related geophysical time series and transforming the time series using a wavelet transformation. The wavelet transformation coefficients may be organized into a plurality of subband traces. The method includes modifying one or more transform coefficients within a plurality of the subband traces or within all but one of the subbands of traces and then inverting the subband traces using an inverse transform to produce a filtered version of the transformed portion of the geophysical time series. The method allows for design and analysis of non-stationary filters and filter parameters in untransformed data space. Non-stationary signals may be filtered in all or in windowed portions of the geophysical time series data.
A method of filtering geophysical time series, the method comprising:
A method of determining filter parameters for geophysical time series, the method comprising:
A method of determining filter parameters for geophysical time series, the method comprising:
A method of filtering geophysical time series, the method comprising:
Dependencies are inferred from the claim text.