Method and device for deblending seismic data using self-adapting and/or selective radon interpolation
AssigneeCgg Services SAS
InventorsRoss Haacke, Gordon Poole, Margherita Maraschini
Life of this patent
Estimating the term…
Abstract
Methods (700) and devices (600) for seismic data processing estimate (720) signal-to-noise ratios of data in a spatio-temporal block of data, determine (730) data-domain weights associated to the data based on the estimated signal-to-noise ratios, and then generate (740) a model of the signal and/or a model of the noise using the data-domain weights.
Claims20
A method for removing noise from seismic data recorded by receivers over an underground formation, the data representing overlapping signals carrying structural information, the method comprising:
- selecting a spatio-temporal block of data focusing on one of the overlapping signals at a specific location, from the seismic data;
- estimating signal-to-noise ratios of data in the spatio-temporal block of data, for the one of the overlapping signals that is coherent with first seismic waves used to explore the underground formation and the noise that includes other of the overlapping signals;
- determining data-domain weights associated to the data, the data-domain weights being determined based on the estimated signal-to-noise ratios;
- generating a model of the one of the overlapping signals and/or a model of the noise from the seismic data using the data-domain weights thereby separating the one of the signals from the overlapping signals;
- and
- creating an image of the underground formation using the model of the one of the overlapping signals and/or the model of the noise to search and evaluate subterranean hydrocarbon deposits.
An apparatus configured to remove noise from seismic data recorded by receivers over an underground formation, the data representing overlapping signals carrying structural information, the apparatus comprising:
- an input/output interface configured to receive the seismic data and/or to output an image of the explored underground formation;
- and
- a data processing unit configured
- to select a spatio-temporal block of data focusing on one of the overlapping signals at a specific location, from the seismic data;
- to estimate signal-to-noise ratios of data in the spatio-temporal block of data, for the one of the overlapping signals that is coherent with first seismic waves used to explore the underground formation and the noise that includes other of the overlapping signals;
- to determine data-domain weights associated to the data, the data-domain weights being determined based on the estimated signal-to-noise ratios;
- to generate a model of the one of the overlapping signals and/or a model of the noise from the seismic data using the data-domain weights thereby separating the one of the overlapping signals;
- and
- to create the image of the explored underground formation using the model of the one of the overlapping signals signal and/or the model of the noise to search and evaluate subterranean hydrocarbon deposits.
A non-transitory computer readable medium storing executable codes which when executed by a computer make the computer to perform a method for removing noise from seismic data recorded by receivers over an underground formation, the data representing overlapping signals carrying structural information, the method comprising:
- selecting a spatio-temporal block of data focusing on one of the overlapping signals at a specific location, from the seismic data;
- estimating signal-to-noise ratios for data in the spatio-temporal block of data, for the one of the overlapping signals that is coherent with first seismic waves used to explore the underground formation and a noise that includes other of the overlapping signals;
- determining data-domain weights associated to the data, the data-domain weights being determined based on the estimated signal-to-noise ratios;
- generating a model of the one of the overlapping signals and/or a model of the noise from the seismic data using the data-domain weights thereby separating the one of the
- overlapping signals;
- and
- creating an image of the underground formation using the model of the one of the overlapping signals and/or the model of the noise to search and evaluate subterranean hydrocarbon deposits.
Dependencies are inferred from the claim text.