Method for time-lapse wave separation
AssigneeCggveritas Services SA
InventorsJulien COTTON, Thomas BIANCHI
Life of this patent
Estimating the term…
Abstract
A method for processing seismic data acquired using the same seismic survey setup over long periods of time includes acquiring sets of seismic data using the same seismic survey setup over multiple days, the sets being gathered as repeated seismic data. The method further includes estimating a time-variable wavelet corresponding to unwanted waves, and determining a propagation of the time-variable wavelet, which propagation is assumed to be constant in time, by solving an inverse problem using the repeated seismic data and the estimated time-variable wavelet. The method also includes extracting signal data by subtracting a convolution of the estimated time-variable wavelet and the propagation from the repeated seismic data.
Claims20
A method for processing seismic data acquired with the same seismic survey setup over long periods of time, the method comprising:
- acquiring sets of seismic data using the same seismic survey setup over multiple days, the sets being gathered as repeated seismic data;
- estimating a time-variable wavelet corresponding to unwanted waves;
- determining a propagation of the time-variable wavelet, which propagation is assumed to be constant in time, by solving an inverse problem using the repeated seismic data and the estimated time-variable wavelet;
- and
- extracting signal data by subtracting a convolution of the estimated time-variable wavelet and the propagation from the repeated seismic data.
A computer readable storage medium non-transitory storing executable codes which, when executed on a computer, make the computer to process repeated seismic data that are gathered from sets of seismic data acquired using the same seismic survey setup over multiple days, according to a method comprising:
- estimating a time-variable wavelet corresponding to unwanted waves;
- determining a propagation of the time-variable wavelet, which propagation is assumed to be constant in time, by solving an inverse problem using the repeated seismic data and the estimated time-variable wavelet;
- and
- extracting signal data by subtracting a convolution of the estimated time-variable wavelet and the propagation from the repeated seismic data.
A seismic data processing device, comprising:
- an interface configured to receive repeated seismic data gathered using the same seismic survey setup over multiple days;
- and
- a data processing unit connected to the interface and configured to process the repeated seismic data by
- (1) estimating a time-variable wavelet corresponding to unwanted waves;
- (2) determining a propagation that is constant in time, by solving an inverse problem using the gathered repeated seismic data and the estimated time variable wavelet;
- and
- (3) extracting signal data by subtracting a convolution of the estimated time-variable wavelet and the propagation from the repeated seismic data.
Dependencies are inferred from the claim text.