Seismic data is used to visualize the Earth's sub surface. This is achieved by measuring travel times of reflections from pressure waves propagating through the ground. Seismic data and interpretations of seismic data will therefore often have z values in travel time, not depth. In order to get a depth value for a travel time value, we need to do a depth conversion. A depth conversion combines the velocity of the pressure wave with the travel time to get a depth value.
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A velocity model is stored as an item in your Project. It represents the seismic velocities in an area, and is used as input to the "Velocity Model Depth Convert" command. In order to
To create a new velocity model
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- Right click a generic folder
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- with the Velocity models schema
- Select Generate Velocity model
- Set the parameters you want to use in your model
- Click Execute
A new velocity model i created in the folder.
To view or edit an existing velocity model
- Right click the velocity model
- Select "View/Edit"
A dialog will appear with the current settings of the velocity model. You may change the parameters if you wish. Click OK if you want to use the changes you did in the dialog.
Supported velocity models:
Geocap currently supports these types of velocity models:
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Depth Conversion
The command " Velocity Model Depth Convert" can can be used to depth convert data in Geocap. The command is available on a velocity model.
To depth convert data using a velocity model
- Right click the velocity model
- Select Velocity Model Depth Convert, and the command editor will appear.
- Browse inn the data you want to
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- depth convert into the Input field.
- select a folder for the output
- click execute.
The command can be used to depth convert many different datatypes in Geocap, including:
- Seismic 2D lines
- IHorizon (seismic interpretations)
- Poly Data (points, lines, polygons)
- Structured Points (Grids)
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