[OpendTect_Users] 2D viewers in OpendTect and screenshot tips

[Mike Stone]

Ahhh....

How did I not see the 2D viewer.
I guess the only real downside is I can't display multiple attributes the
way you can in 3D?

Another unrelated question,

Any tips on boosting crossline pull up speed? We have fairly large
volumes(100-200GB) So these are taking awhile.
Is there anyway to have a 'crossline ordered' attribute?


Thanks again.

Mike Stone
832-768-0884
MStone at ACT3Solutions.com


On Wed, May 18, 2011 at 4:13 AM, Arnaud Huck <arnaud.huck at dgbes.com> wrote:

> Dear OpendTect users,
>
> Following the last discussion I would to gather for you some tips you
> may not know.
>
> First of all despite OpendTect being a native 3D environment, it does
> contain an increasing number of 2D viewers that are gradually introduced
> for 3 years now. Let me summarize them:
>
> - All attributes displayed on vertical sections (inline, crossline,
> random line, 2D line) can be posted in a 2D viewer from their
> right-click menu, in wiggles or colour display. The 2D viewer is
> attached to the corresponding tree element and gets its positioning,
> data and colour scheme from it (although that later can be changed in
> the 2D viewer).  You can have one 2D viewer for each tree item, with up
> to 2 attributes per viewer, 1 of display type wiggle and the other one
> of display type VD (colour).
> - The prestack gathers displayed in the 3D scene can also be posted in a
> 2D viewer from their right-click menu.
> - The surfaces (Z values or grids) can be posted in a 2D viewer that
> will always be north oriented, from their right-click menu.
> - The synthetic-to-seismic tie module is of course natively a 2D viewer.
> Please note that the synthetics and composites traces can be saved in
> volumes for display in the 3D window (on top of another attribute). Also
> the wavelet manager enables to display wavelets in time, frequency and
> phase domains, or the display of multiple wavelets overlaid in the time
> domain (merge utility). Well logs also have their own 2D viewer in the
> right click menu of the wells loaded in the scene.
> - Several attributes have 2D analysis windows: Gapped deconvolution
> (auto-correlation window), spectral decomposition (Time-Frequency panels)
> - Several plugins have their own 2D viewer: The well correlation panel
> is a new plugin that allows to display seismic data, horizons and well
> logs in a single 2D window. Also the VMB has vertical and horizontal
> velocity analysis panel with gather and semblance display. The CCB
> plugin has a 2D panel showing the filtered seismic data in the
> structural or flattened domain. Finally the SSB/SCI plugins have 2D
> parameter analysis windows where the impact of the operator can be
> displayed on vertical sections while tuning the design parameters.
>
> Some viewers listed above do not actually do more than displaying data.
> However the main 2D viewers (the first of the list and the well
> correlation panel) actually are working areas. You can pick faults and
> horizons in a 2D manner solely in these windows, without doing any
> picking in the 3D scene (but the viewer itself must be started from the
> 3D scene). This picking mode has been enabled in OD4.0 for the Kingdom
> addicts and the workflow has been made fully independent in OpendTect
> 4.2: The 2D viewer features a tree where new elements can be added for
> picking. Note that horizons picked on a coarse 2D setup will need to be
> gridded in the 3D scene after the 2D interpretation. Nevertheless you
> will NOT benefit from the 3D tracking engine by interpreting horizons in
> 2D: In volume tracking mode you can much more easily create full
> horizons from a few well-placed seeds. Also the 2D interpretation does
> not integrate the benefits of the new tracking mode that utilizes
> SteeringCubes instead of seismic amplitudes for getting very quickly
> several horizons using the Dip-steering and HorizonCube plugins.
>
>
> Now let me provide you some tips for reproducible screenshots:
>
> 1) First of all select the data to display: Use the "position" function
> in the right-click menu of your element to specify the inline,
> crossline, time ranges.
> 2) Choose if you want a screenshot in the 3D scene (a) or in a 2D viewer
> (b)
> 2a) 3D scene: Optionally add gridlines, toggle on or off the
> perspective, post the colorbar in the scene and axis annotations, toggle
> on or off the survey box annotations, choose the right camera angle or
> the shortcuts "View inline", "View crossline"., ... Most important:
> Switch the resolution of your vertical section to "Highest" to avoid
> blocky displays (right-click menu of the tree item).
> 2b) Post the data in the 2D viewer. The window will be filled by data
> (you can send the tree outside the 2D viewer) according to the ranges
> specified in (1). Thus resizing the window will directly affect the
> aspect ratio of the screenshot.
> 3) For both screenshots from 2D and 3D displays: When using the
> integrated snapshot tool you may toggle off "Lock aspect ratio".
> Increasing the vertical size for the same horizontal size (or the
> opposite) will then directly stretch the data to the right size. Note
> that this screenshot tool accesses the data directly and enables you to
> make very large resolution pictures unlike with an external tool that is
> limited to your screen resolution.
>
> Finally the post would not be complete without mentioning the PDF3D
> plugin that largely decreases the number of screenshots to make since it
> can post the content of an entire 3D scene into an interactive PDF
> document where one can change the camera position and zoom level at will.
>
> Best regards,
> Arnaud Huck.
>
> --
> -- Senior Geoscientist
> -- dGB Earth Sciences
> -- Nijverheidstraat 11-2, 7511 JM Enschede, The Netherlands
> -- mailto: arnaud.huck at dgbes.com, http://www.dgbes.com
> -- Tel: +31 53 4315155 , Fax: +31 53 4315104
>
>
>
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