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Visualizing Prestack and Multi-Component Data in OpendTect OpendTect Master Class June 15, 2014.

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Presentation on theme: "Visualizing Prestack and Multi-Component Data in OpendTect OpendTect Master Class June 15, 2014."— Presentation transcript:

1 Visualizing Prestack and Multi-Component Data in OpendTect OpendTect Master Class June 15, 2014

2 Outline Introduction Prestack Visualization –In 3D scene –In 2D Panel Display Gathers Display Mute, Display Angle Gathers Multi-Component Visualization –Evaluation of Multi-Component Data Example: Spectral Decomposition Cube

3 Introduction This presentation will first cover the visualization of prestack data in OpendTect and continue with a method for viewing (and evaluating) multi-component data. The steps for each method will be covered. Requirements: –Sufficient RAM (8+GB) and a good graphics card (1+GB)

4 Introduction License Requirements Prestack Visualization No additional license required –In 3D scene –In 2D Panel Display Gathers Display Mute, Display Angle Gathers Multi-Component Visualization No additional license required –Evaluation of Multi-Component Data Example: Spectral Decomposition Cube

5 Outline Introduction Prestack Visualization –In 3D scene –In 2D Panel Display Gathers Display Mute, Display Angle Gathers Multi-Component Visualization –Evaluation of Multi-Component Data Example: Spectral Decomposition Cube

6 Prestack Visualization (3D Scene) Using the Penobscot dataset (available on the OSR)OSR –Load an inline (or crossline) and right-click on the data displayed in the scene in order to load the prestack which is displayed in the crossline direction

7 Prestack Visualization (3D Scene) The positions pop-up allows you to step along the inline in user-defined steps or enter the crossline number directly. Alternatively, you can drag the prestack directly to reposition and the data is displayed on release:

8 Outline Introduction Prestack Visualization –In 3D scene –In 2D Panel Display Gathers Display Mute, Display Angle Gathers Multi-Component Visualization –Evaluation of Multi-Component Data Example: Spectral Decomposition Cube

9 Prestack Visualization (2D Panel) The prestack data may also be displayed in the 2D Viewer (right-click on the prestack in the scene):

10 Prestack Visualization (2D Panel) The ‘Set Positions’ icon allows you to change the ranges and step (therefore the number of gathers displayed):

11 Prestack Visualization (2D Panel) The ‘Set Gather Data’ icon allows for selection of multiple gathers:

12 Prestack Visualization (2D Panel) The ‘Set seismic display properties’ icon gives display options for individual gathers:

13 Outline Introduction Prestack Visualization –In 3D scene –In 2D Panel Display Gathers Display Mute, Display Angle Gathers Multi-Component Visualization –Evaluation of Multi-Component Data Example: Spectral Decomposition Cube

14 Prestack Visualization (2D Panel) Clicking on the ‘Pre-processing’ icon allows the following options:

15 Prestack Visualization (2D Panel) You may load and display mute functions:

16 Prestack Visualization (2D Panel) Angle data may be displayed:

17 Outline Introduction Prestack Visualization –In 3D scene –In 2D Panel Display Gathers Display Mute, Display Angle Gathers Multi-Component Visualization –Evaluation of Multi-Component Data Example: Spectral Decomposition Cube

18 Multi-Component Visualization Using the Spectral Decomposition attribute as an example, we will demonstrate how it’s possible to create a multi-component cube. It is still quite cumbersome in v4.6, but in v5.0 this process will be enhanced and made more user-friendly. The general idea (v4.6) is that one creates a ‘pseudo-prestack’ cube using the ‘Create multi-cube pre-stack data store’ feature (located via the ‘Manage 3D Prestack Seismics’ window).

19 Multi-Component Visualization The frequency components of Spectral Decomposition are each assigned a ‘pseudo-offset’ value as the cube is constructed

20 Multi-Component Visualization It may be useful to label your frequencies with ‘appropriate pseudo-offsets’ (ie: 4Hz-400m, 8Hz-800m, etc.)


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