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Geoscience > Main Launcher > Time/Depth Menu > Time/Depth Conversion > Select Velocity Model

Time / Depth Conversion

The Time/Depth Conversion application uses an existing velocity model to convert seismic, horizon, and fault data from time to depth, or from depth to time. The conversion is performed using the relationship v=d/t, with the velocities determined from the velocity model, and the depth or time taken from the input seismic, horizon, and fault data. 

If you don't have an existing velocity model, you can create one in the Time/Depth Velocity Model application using the Generate Velocity Model option, which is available from the Tools menu.

ClosedHow do I convert data from time to depth?

  1. Specify the conversion type, the Model Source,the Velocity Units of your velocity model.

  2. Select the Velocity Model.

  3. Select the seismic files you want to convert, and then optionally limit the vertical range of the output file.

  4. Select the Horizons that you want to convert from time to depth, or from depth to time.

  5. Select the Grid that you want to convert from time to depth, or from depth to time.

  6. Select the Faults  that you want to convert from time to depth, or from depth to time.

  7. Specify the location and format of your output seismic file(s).

  8. Modify the default Extension. This will be appended to the name of any seismic, horizon, and fault data that you are converting.

  9. Click . A status bar will appear to show the progress of the calculation.

The seismic file that is created in the calculation will be a version of the input file, with the Extension that you select appended to the original file type (e.g. "MIG- To Depth" . The maximum time or depth range of the output file is calculated using the average velocity taken from the velocity model.

General Information



Convert

From time to depth: Convert seismic, horizon and fault data from the time domain to the depth domain.

From depth to time: Convert seismic, horizon and fault data from the depth domain to the time domain.

Model Source

Select the model source. This selection will change the available options in the Velocity Model section of the window.

Velocity Model: Use a velocity model that exists in your project.

SEG-Y File: Use a velocity model that has been saved as a SEG-Y file.

Specify Velocity Units

Velocity Units: Select the units for the velocity model that you are going to use for the conversion.
  • Meters/second
  • Feet/second

Select Velocity Model

Use Active Velocity Model: Use the active velocity model for the project. If there is no active velocity model then you must use the Select Velocity Model option. This choice is only available if you specify Velocity Model as the Model Source.

Select Velocity Model: Select a velocity model from the list of all available velocity models. This choice is only available if you specify Velocity Model as the Model Source.

Velocity Model: Select the SEG-Y file that contains the velocity model data. This choice is only available if you specify SEG-Y as the Model Source.



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