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Define good default chunks for seismic CDP gathers #35

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tasansal opened this issue Sep 2, 2022 · 1 comment

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tasansal commented Sep 2, 2022 •

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Intro

This is regarding regularized CDP offset gathers and is pre-stack.

We need to define good default chunk sizes that satisfy multiple use cases (see access patterns below).

Keys

3D acquisition:

Inline
Crossline
Offset (or Angle)

2D acquisition:

CDP
Offset (or Angle)

+ Time or depth for both.

Access Patterns

Full traces for a geographic point ([il, xl] or CDP)
Visualization (tiled rendering); means we chunk sample axis
Be able to re-chunk into offset/angle volumes (i.e., split the ensemble in 3D)
Power of 2 chunk sizes for ML applications
(holy grail, but rare) also support time slices on offset/angle planes

Sizes

Support 2D and 3D CDP gathers
3,000 - 7,000 time or depth samples
100 - 300 offset values (or 5 - 25 angle values). Usually more offsets on 2D.
4TB+ files

tasansal added the enhancement label

srib mentioned this issue

Greater Shot Ingestion Flexibility #211

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Collaborator Author

tasansal commented Aug 25, 2023

will do this later as a part of MDIO v1.

tasansal closed this as completed

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