I.What is the basic PaleoScan workflow?         

  1. Import data into PaleoScan: seismic, faults, wells, faults, markers, cultural data
  2. Insert or interpret constraints area into PaleoScan: faults, salt (Multi-Z)
  3. Model Grid computation:
    1. Choose the right Model Grid parameters for the seismic: patch size, polarity, smooth, under-sampling
    2. Refine the AutoInterp Model Grid (horizon editing)
    3. Quality check the interpretation using preview mode
  4. 3D GeoModel Computation
    1. Choose the 3D GeoModel parameters: smooth, link probability, interpolation
    2. Quality check the GeoModel
  5. 3D GeoModel applications:
    1. Basic platform: Horizon stack, Attributes, Geobody modelling, Fault management, Salt management, Well correlation
    2. Add-on modules: Sequence stratigraphy, Automatic geobody extraction, Property modelling, RGB blending, Well tie, Colored inversion, Spectral blueing.

II. I am not satisfied with some parts of my model grid; how can I refine/edit it?

I. Disconnect Patches of Active Horizon:
To disconnect all the patches of the active horizon displayed in the Horizon Viewer, click on the Disconnect Patches button in the toolbar. The current horizon will progressively disappear from the Horizon Viewer. This horizon will no longer be taken into account in the Model-Grid interpretation, it can then be picked again in a better way.

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II. Disconnect Patches between Horizons:
In order to clear the interpretation in a specific location of the Model-Grid, patches between horizons can be disconnected. This means that the links between all the patches included between these horizons will be broken with a 3D effect. The interpretation can afterward be restarted without any automatic propagation in order to manually control the propagation between patches. The refinement of this blank zone will be controlled by using the correlation threshold available from the Interp Viewer properties. Links between both horizons are no longer taken into account in the Model-Grid interpretation. As a result, marked horizons previously included into this area will disappear.
The horizons used to define the area in which patches will be disconnected have to be marked horizons
Select both marked horizons by using the selection mouse mode and the CTRL key and then click on the option “Disconnect All Patches” between two selected Horizons available from the Model-Grid module.

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III. Filling Option:
Once the horizon is propagated, the small gaps can be filled by using the “Fill Active Horizon” option under the “Model-Grid” toolbar. To do so, click on the button several times to complete as much as possible the horizon. This tool is based on the similarity of the seismic traces to connect some neighboring patches to the horizon displayed in the horizon viewer.

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IV. Horizon Edition:

By using the 2D Preview Model & Position Line, Model-Grid's inconsistencies concerning its stratigraphic organization can be detected.
Editing tools such as Edit a HorizonEraserPatches Selection, and Force Model-Grid interface are available to quickly refine any horizon.
Note:  We mainly use this type of Model-Grid management.

III.How can I apply a spectral decomposition to horizon stacks in order to do a RGB blending?

  1. Click on the Spectral Decomposition tool in the Attributes toolbar
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2. Drag and drop (or double click into the input edit selection) the input volume.

Then, use the cross-navigation mouse mode to select a trace. The frequency spectrogram along the seismic trace will be displayed. The method to use, STFT or Wavelet Transform, and its corresponding parameters can be chosen.

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3. Using the Frequency Picking mouse mode, double click on the Spectrogram viewer to select a frequency.

The selection of the frequency can be laterally adjusted and a preview of the current selected frequency decomposition is then displayed.

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4. Save the outputs: create volumes or real-time attributes.

If three frequencies have been selected and the Advanced Interpretation license is activated, the three resulting real-time attributes from this interface can be sent to a RGB viewer for volumes.

5. Display the results on Horizon Stacks.

Open a Horizon Stack, right click on the window and select "Duplicate Horizon Stack with new attribute...", or create a new one. Then, select the "None" filter and drag and drop the saved volume or real-time attribute from Spectral decomposition. Several Horizon stacks can be created at the same time by clicking on the cross, especially if several volumes with different frequencies have been computed. Then click on Run to create the Horizon Stacks.

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If the frequencies and parameters to be applied are already known, the "Spectral decomposition" can be selected as filter option. The Horizon Stack can then be directly created without computing new volumes or real-time attributes.

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Then, once the 3 Horizon Stacks have been created, they can be displayed into a RGB viewer to enhance the seismic interpretation, thanks to the Advanced Interpretation license. The RGB blending result can also be displayed into the 3D viewer.