Noise attenuation via thresholding in a transform domain

1. A method comprising:

receiving seismic data of a subterranean region in a data domain wherein a first portion of the data domain comprises a signal to noise ratio that exceeds a signal to noise ratio in a second portion of the data domain;

generating a model, wherein generating the model generates a model based at least in part on the first portion of the data domain;

in a transform domain, based at least in part on the model, filtering at least a portion of the seismic data in the second portion of the data domain;

based at least in part on the filtering, outputting noise attenuated seismic data for at least a portion of the seismic data in the second portion of the data domain; and

controlling equipment of a field operation with respect to the subterranean region based at least in part on using the output noise attenuated seismic data to identify a structure in the subterranean region.

2. The method of claim 1 wherein generating the model generates a synthetic model.

3. The method of claim 1 wherein the transform domain comprises a curvelet domain.

4. The method of claim 1 wherein the transform domain comprises a τ-p domain.

5. The method of claim 1 wherein the noise comprises interference noise.

6. The method of claim 5 wherein the interference noise comprises noise associated with a shot interval time being shorter than a record time.

7. The method of claim 1 wherein the signal to noise ratio of the second portion is less than unity.

8. The method of claim 1 further comprising processing the noise attenuated data and interpreting the noise attenuated data.

9. The method of claim 1 wherein the first portion and the second portion differ with respect to depth in an environment.

10. The method of claim 1 wherein the filtering comprises thresholding.

11. A system comprising:

a processor;

memory operatively coupled to the processor; and

processor-executable instructions stored in the memory to instruct the system to:

receive seismic data of a subterranean region in a data domain wherein a first portion of the data domain comprises a signal to noise ratio that exceeds a signal to noise ratio in a second portion of the data domain;

generate a model based at least in part on the first portion of the data domain;

in a transform domain, based at least in part on the model, filter at least a portion of the data in the second portion of the data domain;

based at least in part on the filter of at least a portion of the data in the second portion of the data domain, output noise attenuated data for at least a portion of the data in the second portion of the data domain; and

control equipment of a field operation with respect to the subterranean region based at least in part on use of the output noise attenuated seismic data to identify a structure in the subterranean region.

12. The system of claim 11 wherein the transform domain comprises a curvelet domain.

13. The system of claim 11 wherein the transform domain comprises a τ-p domain.

14. The system of claim 11 wherein the noise comprises interference noise.

15. The system of claim 11 wherein the first portion and the second portion differ with respect to depth in an environment.

16. The system of claim 11 wherein the data comprises survey data of a subsea geologic environment.

17. One or more computer-readable storage media comprising processor-executable instructions to instruct a computing system to:

receive seismic data of a subterranean region in a data domain wherein a first portion of the data domain comprises a signal to noise ratio that exceeds a signal to noise ratio in a second portion of the data domain;

generate a model based at least in part on the first portion of the data domain;

in a transform domain, based at least in part on the model, filter at least a portion of the data in the second portion of the data domain;

based at least in part on the filter of at least a portion of the data in the second portion of the data domain, output noise attenuated data for at least a portion of the data in the second portion of the data domain; and

control equipment of a field operation with respect to the subterranean region based at least in part on use of the output noise attenuated seismic data to identify a structure in the subterranean region.