We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.

Durham Research Online
You are in:

Static corrections for Vibroseis data over sand dunes in western Libya.

Ushah, A. M. A. and Goulty, N. R. (2004) 'Static corrections for Vibroseis data over sand dunes in western Libya.', First break., 22 (12). pp. 33-41.


Parts of the Murzuq Basin in western Libya are covered by linear sand dunes, which reach heights of around 100 m above the gravel plain. The sand dunes cause large increases in the travel times of reflected events in seismic data. In recent years, the conventional method used to calculate field static corrections has been to interpolate the near-surface velocity structure between upholes. Results are often unsatisfactory on lines that cross the dunes because the reflection events contain false structures that correlate with sand dune topography. These structural artefacts are caused by residual static errors which are too large for automatic statics programs to correct during processing. An alternative method of calculating field statics is to pick the first breaks on the Vibroseis field records, calculate the delay times at each station, and use the delay times directly as the field statics after applying a linear adjustment to match them to the upholes. This simple version of the refraction method does not require near-surface velocity-depth models to be produced, and gives much better results than the conventional field static method.

Item Type:Article
Full text:Full text not available from this repository.
Publisher Web site:
Record Created:07 Jun 2010 12:05
Last Modified:12 Nov 2010 16:57

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitterExport: EndNote, Zotero | BibTex
Look up in GoogleScholar | Find in a UK Library