Iterative stacking of seismic image partitions

Patent metadata

Field	Value
Publication number	US-9726772-B2
Application number	US-201414515950-A
Country	US
Kind code	B2
Filing date	Oct 16, 2014
Priority date	Oct 17, 2013
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

Systems, media, and methods for processing seismic data are disclosed. For example, in one embodiment, the method may include receiving a plurality of partial image partitions of a migrated seismic image, and stacking the plurality of partial image partitions such that a first image is generated. The method may also include aligning the plurality of partial image partitions based at least partially on the first image. Aligning may include adjusting at least one of the plurality of partial image partitions and generating a displacement field. The method may also include, based at least in part on the displacement field, stacking the plurality of aligned partial image partitions to generate a second image. The method may further include based at least in part on the second image, realigning the plurality of aligned partial image partitions.

First claim

What is claimed is:

1. A method for processing seismic data, comprising:
receiving a plurality of partial image partitions of a migrated seismic image;
stacking the plurality of partial image partitions such that a first image is generated;
aligning the plurality of partial image partitions based at least partially on the first image, wherein aligning comprises adjusting at least one of the plurality of partial image partitions and generating a displacement field, and wherein during the alignment of the plurality of image partitions, the first image is constructed for individual offsets, azimuth bins, or a combination thereof;
based at least in part on the displacement field, stacking the plurality of aligned partial image partitions to generate a second image; and
based at least in part on the second image, realigning the plurality of aligned partial image partitions.

2. The method of claim 1 , further comprising determining that the second image has a higher quality than the first image, and
wherein realigning the plurality of aligned partial images is in response to determining that the second image has a higher quality than the first image.

3. The method of claim 2 , further comprising causing the second image to be displayed, and
wherein determining that the second image has a higher quality than the first image is based at least in part on an analysis of the displayed second image in comparison to the first image.

4. The method of claim 3 , wherein the analysis of the displayed second image is based at least partially on a comparison of a continuity of one or more reflection events in the second image with a continuity of the one or more reflection events in the first image.

5. The method of claim 1 , further comprising smoothing the displacement field prior to stacking the plurality of aligned image partitions.

6. The method of claim 1 , wherein stacking the plurality of partial images comprises using a weighted stacking based at least partially on a coherency of one or more signals of at least one of the plurality of partial images.

7. The method of claim 1 , wherein stacking the plurality of aligned images comprises directly stacking the plurality of aligned images.

8. A computing system, comprising:
one or more processors; and
a memory system comprising one or more non-transitory computer-readable media storing instructions that, when executed by at least one of the one or more processors, cause the computing system to perform operations, the operations comprising:
receiving a plurality of partial image partitions of a migrated seismic image;
stacking the plurality of partial image partitions such that a first image is generated;
aligning the plurality of partial image partitions based at least partially on the first image, wherein aligning comprises adjusting at least one of the plurality of partial image partitions and generating a displacement field, and wherein during the alignment of the plurality of image partitions, the first image is constructed for individual offsets, azimuth bins, or a combination thereof;
based at least in part on the displacement field, stacking the plurality of aligned partial image partitions to generate a second image; and
based at least in part on the second image, realigning the plurality of aligned partial image partitions.

9. The system of claim 8 , wherein the operations further comprise determining that the second image has a higher quality than the first image, wherein realigning the plurality of aligned partial images is in response to determining that the second image has a higher quality than the first image.

10. The system of claim 9 , wherein the operations further comprise causing the second image to be displayed, wherein determining that the second image has a higher quality than the first image is based at least in part on an analysis of the displayed second image.

11. The system of claim 8 , wherein the operations further comprise smoothing the displacement field prior to stacking the plurality of aligned image partitions.

12. The system of claim 8 , wherein stacking the plurality of partial images comprises using a weighted stacking based at least partially on a coherency of one or more signals of at least one of the plurality of partial images.

13. The system of claim 8 , wherein stacking the plurality of aligned images comprises directly stacking the plurality of aligned images.

14. A non-transitory computer-readable medium storing instructions that, when executed by at least one processor of a computing system, cause the computing system to perform operations, the operations comprising:
receiving a plurality of partial image partitions of a migrated seismic image;
stacking the plurality of partial image partitions such that a first image is generated;
aligning the plurality of partial image partitions based at least partially on the first image, wherein aligning comprises adjusting at least one of the plurality of partial image partitions and generating a displacement field, and wherein during the alignment of the plurality of image partitions, the first image is constructed for individual offsets, azimuth bins, or a combination thereof;
based at least in part on the displacement field, stacking the plurality of aligned partial image partitions to generate a second image; and
based at least in part on the second image, realigning the plurality of aligned partial image partitions.

15. The medium of claim 14 , wherein the operations further comprise determining that the second image has a higher quality than the first image, wherein realigning the plurality of aligned partial images is in response to determining that the second image has a higher quality than the first image.

16. The medium of claim 15 , wherein the operations further comprise causing the second image to be displayed, wherein determining that the second image has a higher quality than the first image is based at least in part on an analysis of the displayed second image.

17. The medium of claim 14 , wherein the operations further comprise smoothing the displacement field prior to stacking the plurality of aligned image partitions.

18. The medium of claim 14 , wherein stacking the plurality of partial images comprises using a weighted stacking based at least partially on a coherency of one or more signals of at least one of the plurality of partial images.

19. The medium of claim 14 , wherein stacking the plurality of aligned images comprises directly stacking the plurality of aligned images.

20. The method of claim 1 , wherein during the alignment of the plurality of image partitions, the first image is constructed for individual offsets, azimuth bins, or a combination thereof, within which a moveout is smaller than half of a wavelength of the first image.

21. The method of claim 1 , further comprising smoothing the displacement field, wherein a strength of the smoothing of the displacement field differs between at least two iterations.

22. The method of claim 21 , wherein a first smoothing filter is used for a first iteration, a second smoothing filter is used for a second iteration, and the first filter is heavier than the second filter.

Assignees

• Westerngeco Llc

Inventors

• Zhao Chunpeng
• Gu Ruoyu
• King Ryan
• Gonzalez Alfonso

Classifications

• G01V1/362 Primary

  Effecting static or dynamic corrections; Stacking · CPC title

• G01V2210/322

  Trace stacking · CPC title