Seismic Plugin

Seismic Plugin
is a tool for analyzing scanned seismic reflection profiles. It works within Adobe Photoshop on Macintosh and Windows. It is in use by universities and oil companies worldwide, including Princeton University, Texaco, Conoco, and Lamont-Doherty Earth Observatory.

Seismic Plugin consists of two modules:

  • Depth Convert approximates the conversion of a time-measured seismic reflection profile to a depth-measured one.
  • Unfold flattens a folded horizon in a profile back to horizontal.

See our example of processing a marine seismic reflection profile.

An article, "Low-cost approach to depth correction of printed seismic sections", was published in the February 2000 issue of Offshore Magazine, pp. 117-118. It includes case studies from users of the software. The article is online at the Offshore web site; the reference list for the article is also available online.

The software is no longer for sale, as it is not compatible with current versions of Photoshop.  Please contact Jay Lieske if you are interested in custom development of the software for your system.

Geologists often need to perform interpretations of structural geology from seismic reflection profiles. They may want to make a balanced cross section, measure angles or depths of reflectors, etc. But much seismic reflection data is not corrected for the seismic velocities within the profile-- so the profile displays time, not true depths.

Although the depth correction of digital seismic data is straightforward, there are situations where traditional techniques cannot be applied-- for example, when only printouts of the profiles exist, or when the software for processing digital seismic data is inconvenient to use. Seismic Plugin provides an alternative tool for analysis: the geologist can scan the printout of a seismic profile and perform calculations on the scanned image to simulate seismic processing, such as depth correction and reflector unfolding.

Seismic Plugin implements two techniques for analyzing seismic reflection profiles. One is Depth Convert, which converts a time section to a depth section by rubbersheeting each column of an image according to a velocity model added to the image. The second is Unfold, which shifts pixels in the image to straighten a marked horizon in the profile. For both modules, the geologist "paints" the velocity information with Adobe Photoshop's easy-to-use tools, applying as much or as little detail is needed for the analysis at hand.

See also: