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Abstract

Complicated near surface geology and rugged topography can degrade the quality of the seismic<br>images. Time shifts or statics are still the work horse for resolving near-surface related problems.<br>These shifts are usually computed from simple near-surface velocity models. More recently, refraction<br>tomography was used to build more sophisticated models. The limitation of statics is that they are<br>based on vertical ray-path assumption. When this assumption is violated, as in areas of complex<br>geology, this solution fails to resolve the distortions caused by the lateral velocity variations. Waveequation<br>datuming (WED) is a powerful tool to resolve near-surface related problems. It was<br>introduced about thirty years ago but still is not a production tool yet, due to its need for accurate<br>velocity models. Unlike conventional near-surface solutions, WED does not fail for complex nearsurface<br>models, such as those of refraction tomography.<br>In this paper, the evolution of conventional near-surface solutions is reviewed, and then those<br>solutions are compared to WED. Also, we discuss how WED can practically be implemented in a<br>production environment by showing a processing workflow, which can handle the data regularization<br>and interpolation as well as velocity model building. This is demonstrated using a 2D seismic line<br>acquired in an area with a challenging near surface geology.

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/content/papers/10.3997/2214-4609-pdb.248.113
2010-03-07
2021-12-08
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.248.113
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