3D Seismic Data Display

3D Seismic trace draped along X and Y planes of geologic fault block

Q3 1999

Displaying seismic data in 3D is extremely valuable for both initial interpretation, data validation, and final model validation. A seismic cube can be turned into a 3D grid and then rendered as various volumetric surfaces or as X/Y/Z planes in a 3D model. Currently, you can import seismic data from a SEG-Y formatted file or from a Landmark® .3dv seismic cube. The .3dv file is imported using the SeisWorks® Data Import program (an EarthVision license for ev_link is required). Import options allow you to set the line, shotpoint, and time-sampling interval. A 3D grid is output that can then be displayed in the 3D Viewer. From the 3D Viewer 3D Grid Menu, you can view the grid as 3D cubes, isosurfaces, or transparent volumetric clouds or specify the X,Y, and/or Z planar location(s) for displaying slices through the data cube, and even make them transparent.

The standard format for SEG-Y data was defined by the Society of Exploration Geophysicists (SEG) for storage and exchange of seismic data. SEG-Y data from most sources, however, deviate from the standard format. The EarthVision utility was developed based on data from a number of different sources. For a fee, Dynamic Graphics will make program modifications to import other SEG-Y formats not currently supported by this program. Contact Dynamic Graphics Technical Support for more information.

A powerful capability is to display portions of the seismic data cube based on where the XYZ position falls within a 3D model. In other words, a 3D seismic grid can be displayed on a zone-by-zone or block-by-block basis, based on the geologic structure of some other model. This capability is useful for verifying modeling calculations (does the final model match the original seismic data) as well as for correlating other types of information with the seismic data. This type of display is created by generating an "indicator property model" (a single 3D grid (.3grd) for the entire model space) in either the WorkFlow Manager or the Geologic Structure Builder.

 
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Last updated: February 27, 2008