1887
Volume 25 Number 9
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Tariq Ali Alkhalifah, Henk Innemee, Chris Benson, and Sarah Spoors provide the background to a project sponsored by GGS-Spectrum which is investigating a statics innovation in processing based on straight ray datuming in 3D media and designed to be more effective than existing datuming options. Common datuming approaches, like the Kirchhoff or finite difference methods, require reasonable sampling of the sources and receivers. This becomes a serious limitation for datuming data acquired using 3D conventional land acquisition layouts, because of the typical sparse spacing of either the sources or receivers. To combat that, we extend Alkhalifah and Bagiani’s (2006) straight ray datuming (SRD) to handle 3D acquisition geometries. As in the 2D case, 3D SRD is based on straight-rays assumption above and below the datum with Snell’s law honoured in between. This allows for the application of SRD to common shot gathers in one operation (no need to sort the data to common receivers). Similarly, it can be applied to common receiver gathers without the need to sort the data back to common shot gathers. This feature allows for more flexibility in acquisition as it requires, unlike in the conventional case, either the sources or receivers to have a complete fine coverage of the area. In addition, SRD does not require detail description of the near surface velocity model, information from refraction static or any other commonly used method to obtain near surface time shift suffice.

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/content/journals/0.3997/1365-2397.25.1111.27636
2007-09-01
2024-03-29
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  • Article Type: Research Article
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