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Introduction

The seismic interpretation tool lets you interpret horizons, faults and observations. This can be done both manually and automatically. In your Geocap project you will typically have an interpretation folder with one or more Ihorizon datasets, one Faults folder and one Observations folder.

The structure of a horizon in Geocap is as follows:

  • One horizon can contain interpretation from several seismic lines
  • Each line can have many segments
  • Each segment can have many picks

This means that each horizon will normally contain thousands of picks along different seismic lines. Each pick is stored with the following information:

  • Time value
  • Seismic line name
  • Shot point

The way Geocap stores its horizon data is compatible with most other seismic interpretation systems.

The seismic interpretation tutorial is found in the Shelf section Seismic Interpretation.

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In this section:

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Importing interpretation from external files

To import an existing interpretation from file you can import it into an Interpretation folder or a standard Generic folder. A Generic folder is preferable if the interpretation is complete and the lines will be used in gridding and mapping.

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Read more about how to import interpreted horizons in the import chapter Importing Interpretation to get the details.

Interpretation data structure

During interpretation (or import) a dedicated interpretation data structure is created. The base folder is an Interpretation folder. An Interpretation folder contains subfolders and IHorizons. An IHorizon (i.e. Interpreted Horizon) is the parent for any number of Pick Groups. Each Pick Group represents the interpretation of current horizon on a seismic line. The name of a Pick Group must and will be exactly the same as the corresponding seismic line.


Interpretation data structure

Interpretation interface

The seismic interpretation tool can be found under Tools > Seismic Interpretation.


The interpretation menu

Interpreting horizons

Use the Seismic Control tab when interpreting horizons. In the Data section you can browse for existing interpretations and horizons or you can create new ones. The Edit button lets you change the properties and graphical settings of interpretations and horizons. You can display horizons in the graphical window directly from the interpretation menu without using the regular commands.

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Use the Erase button to start erasing.

Interpreting faults

Use the Faults tab when interpreting faults. You can browse for existing interpretation folders and faults or you can create new ones. You can display faults in the graphical window directly from the interpretation menu without using the regular commands.

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Click the Start interpretation button and start digitizing with p or <space> along the fault. Click the Stop button to stop the digitizing.

Interpreting observations

Use the Observation Centre tab when recording observations. You can browse for existing interpretation folders and observations or you can create new ones. You can display observations in the graphical window directly from the interpretation menu without using the regular commands.

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