HorizonCubeTools_OpendTectv4.4

7/28/2019 HorizonCubeTools_OpendTectv4.4

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HorizonCube Tools

Version: 4.4

Farrukh Qayyum

[email protected]


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Introduction

This presentation will introduce you with the HorizonCubetools that are used to manipulate an existing HorizonCube.

The manipulation includes the followings:

-Fill the gaps in a HorizonCube by adding more iterations.-Truncate a HorizonCube to get a better Wheeler Diagram.

-Add a new Horizon to an existing HorizonCube to introduce an additional package (or a

sequence).

-Re-calculate a HorizonCube (or a package) by changing a SteeringCube.

-Extract seismic horizons from a HorizonCube.

.... And Much more.


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Outline

HorizonCube Tools

Add more Iterations

Add or Recalculate 2D Line

Modify or Recalculate 3D Sequence

Extract Horizons

Convert to SteeringCube

Truncate HorizonCube

Get Continuous HorizonCube

Convert Chronostrat to HorizonCube


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How to launch these tools?


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HorizonCube Tools

Add More Iterations



Extract Horizons






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HorizonCube ToolsAdd more iterations...

To fill the gaps in a HorizonCube (red arrows), we suggest to add moreiterations i.e. track horizons in a gap that is being found in a package.

Gaps


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Here is the same HorizonCube (as in previous slide) but with 1 moreiteration.


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How To...

1. Select the Input HorizonCube first and always

output the HorizonCube with a new name.

2. Select the additional iteration that

you would like to add e.g. 1. If youstill find gaps in this new

HorizonCube, then do the same

steps again.


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HorizonCube Tools

Add More Iterations



Extract Horizons






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HorizonCube ToolsAdd / Recalculate Line...

2D HorizonCube

This tool is made available because you might

want to...

1- Modify a 2D HorizonCube adding more lines.2- Add new packages by reading more horizons.

Furthermore, you may change the faults and

recompute the selected HorizonCube.


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How To...

Use the HorizonCube sub-menu

under the Processing menu to

launch the window (right).



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How To...

Modify a 2D HorizonCube by adding more lines.

Select the input HorizonCube.

Select the lines that you want to modify.

Change the settings of a package that you want

to change e.g. change a SteeringCube.

Optional:

If you have interpreted new faults in selected

package and you want to use them in calculation,

you may also select the new faults.


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How To...

Add more packages in an existing 2D HorizonCube

(for specific lines or all lines).


Select the lines that you want to modify.

Press the Read Horizons button. (Tip: you will

have to select at least two horizons i.e. top and

base of the package).

The packages will be automatically inserted in the

calculation mode setup and will be sorted.

Change the settings of a package that you wantto change e.g. change a SteeringCube.


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HorizonCube Tools

Add More Iterations


Modify or Recalculate 3D Sequence Extract Horizons






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HorizonCube ToolsModify / Recalculate 3D Sequence...

3D HorizonCube

This tool is made available because of two

purposes:

1- Modify a 3D HorizonCube by recomputing.

2- Add new packages by reading morehorizons.

Furthermore, you may change the faults and

recompute the selected HorizonCube.


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How To...

Use the HorizonCube sub-menu

under the Processing menu to

launch the window (right).



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How To...

Modify a 3D HorizonCube by recomputing.


Change the settings of a package that you

want to change e.g. change a SteeringCube.

Then change the action (column) to Re-

compute.

Optional:

If you have interpreted new faults in selected

package and you want to use them in

calculation, you may also select the new

faults.


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How To...

Add new packages by reading more

horizons.

Press the Read horizons... button.

Select the horizons that you want to insert

(Tip: you will have to select at least twohorizons i.e. top and base of the package).

The packages will be automatically inserted

in the calculation mode setup and will be

sorted.

Provide the mode and settings for the newly

inserted package e.g. Data driven and the

SteeringCube.

Press Analyze button.

Press Go.


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HorizonCube Tools

Add More Iterations



Extract Horizons






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HorizonCube ToolsExtract Horizons...

How To...1. Display a HorizonCube first and then use this menu.

2. Move the slider (Top/Bottom) at a location where you

want a horizon.

3. Prese the Pick Horizon button to save a horizon at a

selected slider position. You can pick more than one

horizons (repeat steps: 2-3).

4. Press the Proceed button to extract horizons.


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HorizonCube ToolsExtract Horizons...

Use the combination of the slider (Event index) and Pick Horizon to select multiple events.


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HorizonCube Tools

Add More Iterations



Extract Horizons






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HorizonCube ToolsConvert to SteeringCube...

Why?

The HorizonCube can be data driven and as well as model driven. This makes it

more important especially in terms of filtering the seismic data along the

automated horizons geometries. Thus, you might want to create a model based

HorizonCube to create a SteeringCube out of it and filter the seismic data based

on a modelled based SteeringCube.

Further application could be the curvature/dip attributes analysis using a

SteerignCube created from a data driven HorizonCube.

An overlay of SteeringCube (white-red) on the

seismic data. This SteeringCube is created

from a modelled based HorizonCube.


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HorizonCube ToolsConvert to SteeringCube...

How To...1.Select the input HorizonCube.

2.The dip outside a HorizonCube can be set to undefined (type undef in the dip value field) or

leave the dip value to default (0).

3.Type the output name for the SteeringCube.

4.Press Proceed, this will start the batch processing.


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HorizonCube Tools

Add More Iterations



Extract Horizons






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HorizonCube ToolsTruncate HorizonCube...

Remove closely

spaced events

(next slide)


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The selected input HorizonCube is truncated by removing the areas that define the allowed

horizons density i.e. Maximum density. The maximum density value refers to the number ofevents within a seismic sampling rate. For instance, if you observe that you have 5 events

in a 4ms sampled data, you would probably want to remove those unwanted area.

Geologically, such regions of closely spaced horizons are often unconformities, pinchouts,

condensed intervals, and even the leeves (and/or the bottom) of a channel.


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The truncated HorizonCube can be used for a better Wheeler Domain visualization and

thus the subdivision of sequences into systems tracts. The example below, shows acomparison of Wheeler Diagrams of porosity volumes. Both diagrams are automatically

transformed using two types of HorizonCube(s).

Suggestion: For sequence stratigraphic interpretation, it is recommended to truncate a

continous HorizonCube.

Wheeler Domain (Porosity Fairway)

Transformed from a

Continuous HorizonCube

Transformed from a

Truncated HorizonCube


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HorizonCube Tools

Add More Iterations



Extract Horizons






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HorizonCube ToolsGet Continuous HorizonCube...

Truncated events!

You want continuous

events here to build a

low frequency model

C


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H i C b T l


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How To...

1- Launch the window (right) via the HorizonCube sub-menu under

Processing).


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HorizonCube Tools

Add More Iterations



Extract Horizons





H i C b T l


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HorizonCube ToolsConvert ChronoStrat to HorizonCube...

To upgrade the ChronoStrat computed in the previous versions

(earlier than 4.0) into a HorizonCube, you may use this tool.

How To...

Select the input chronostratigraphy created in older version, and write the

output HorizonCube name.


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Thank You!

Documents

HorizonCubeTools_OpendTectv4.4