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- Stacking velocities - ASCII reader
- TGS format - Generic import
- EssoV2 format - ASCII reader
Velocities All velocities can be imported into Generic folder folders in Geocap.
Stacking Velocities - ASCII
Stacking velocities can be imported with or without navigation using the ASCII reader. If the velocities are imported without navigation the reference to geographical position can later be restored by looking at the seismic line name and SP.
Without navigation
Processing velocities with no navigation have no X's or Y's stored.This
The Stacking Velocities (no navigation) menu is a pre-set version of the ascii import dialogue set ready ASCII import menu with settings to read such stacking velocities without navigation (no X's and Y's).
Example of stacking velocity import without navigation
Note that the velocities are defined in time-vel pairs, where each analysis has several such velocity pairs, and is locked to a SP and line reference. The goal of the import is to create a dataset for each line, where each cell in a dataset is a SP consisting of several time-velocity pairs. This is achieved by using the Separate cells and Separate data sets as indicated in the image.
Make sure each column numbers are set correctly. The preview of the five first elements should give you a good indication of this.
Before you import, make sure the Schema is set to Stacking Velocities
With navigation
TGS format
EssoV2 format
Velocity data can be imported into Geocap using the ASCII column readerVelocities with navigation is imported exactly the same way as velocities with no navigation, except for that there are 2 more columns to for X and Y.
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Since the velocities have no navigation it is necessary to assign navigation after the velocities have been imported. |
TGS format
TGS Nopec has created a special format for stacking velocities. This format can be read using the Generic import menu, and setting Format to TGS.
EssoV2 format
The Stacking Velocities, ESSOV2 menu is a pre-set version of the ASCII import menu with settings to read the EssoV2 format.
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Note that the EssoV2 velocities do not have navigation. This means that it is necessary to assign navigation after the velocities have been imported. |
"Generate Velocity Profile"-format
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