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Introduction

Geocap supports different velocities formats. The import method varies depending on the format:

• Stacking velocities - ASCII reader
• TGS format - Generic import
• EssoV2 format - ASCII reader

All velocities can be imported into Generic folders in Geocap.

Stacking Velocities - ASCII

Stacking velocities can be imported with or without navigation using the ASCII column readerreader. 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

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The Stacking Velocities (no navigation) menu is a pre-set version of the ASCII import menu with settings to read stacking velocities without navigation (no X's and Y's).

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Example of stacking velocity import without navigation

Note that the velocities are defined in time-velocity pairs, 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

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Velocities 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.

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.

"Generate Velocity Profile"-format

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