Reassign Geometry Headers

Description Recalculate 2D and 3D geometry headers from headers and surveys.
Module(s) Insight
Requirements Volume
Related Header Maths, Reassign Scaling Headers
Works with 2D, Stacks, Gathers


This process recalculates 2D and 3D geometry headers based on the values of other headers.

It will not allow you to manipulate the headers that fundamentally define a particular volume. For example, if the input is a 3D volume defined on INLINE, CROSSLINE, and OFFSET, then those headers cannot be modified.

It is your responsibility to ensure that the input trace headers are sensible!

Workflow

Workflow
  1. In the Process tab, click the Add icon and select New Process.
  2. Select Reassign Geometry Headers and type a name for the process.
  3. In the Details Panel, select an input volume.
  4. At the Input Headers section, select which trace headers to be reassigned (see Trace Headers).
  5. At the Output Headers section, select which trace headers to be produced.

Trace Headers Used

Which trace headers are actually used will depend on your selection. See below:

  • CDP — 2D CDP location on a given line
  • SX / SY — Source location
  • GX / GY — Receiver location
  • CDPX / CDPY — CDP location (which may or may not be at the bin centre, depending on your input data)
  • INLINE / CROSSLINE — 3D inline and crossline
  • OFFSET — Offset (which may or may not be at the bin centre, depending on your input data)
  • OTRAV — Azimuth

Any of the above trace headers can also be set, depending on the mode.

Input / Output Combinations

The input headers that you choose will determine which headers can be produced:

Input: CDPX / CDPY

  • Inline / Crossline
  • 2D CDP (available only for 2D volumes)

Input: CDPX / CDPY, Offset, Azimuth

  • Inline / Crossline
  • SX / SY / GX / GY
  • 2D CDP (available only for 2D volumes)

Input: SX / SY / GX / GY

  • Inline / Crossline
  • CDPX / CDPY
  • Offset
  • Azimuth
  • 2D CDP (available only for 2D volumes)

Input: Inline / Crossline

  • CDPX / CDPY

Input: 2D CDP (available only for 2D volumes)

  • CDPX / CDPY
  • Inline / Crossline