Practical aspects of prestack depth migration with finite differences

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Finite-difference, prestack, depth migrations offers significant improvements over Kirchhoff methods in imaging near or under salt structures. The authors have implemented a finite-difference prestack depth migration algorithm for use on massively parallel computers which is discussed. The image quality of the finite-difference scheme has been investigated and suggested improvements are discussed. In this presentation, the authors discuss an implicit finite difference migration code, called Salvo, that has been developed through an ACTI (Advanced Computational Technology Initiative) joint project. This code is designed to be efficient on a variety of massively parallel computers. It takes advantage of both frequency and spatial ... continued below

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4 p.

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Ober, C.C.; Oldfield, R.A.; Womble, D.E.; Romero, L.A. & Burch, C.C. July 1, 1997.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Finite-difference, prestack, depth migrations offers significant improvements over Kirchhoff methods in imaging near or under salt structures. The authors have implemented a finite-difference prestack depth migration algorithm for use on massively parallel computers which is discussed. The image quality of the finite-difference scheme has been investigated and suggested improvements are discussed. In this presentation, the authors discuss an implicit finite difference migration code, called Salvo, that has been developed through an ACTI (Advanced Computational Technology Initiative) joint project. This code is designed to be efficient on a variety of massively parallel computers. It takes advantage of both frequency and spatial parallelism as well as the use of nodes dedicated to data input/output (I/O). Besides giving an overview of the finite-difference algorithm and some of the parallelism techniques used, migration results using both Kirchhoff and finite-difference migration will be presented and compared. The authors start out with a very simple Cartoon model where one can intuitively see the multiple travel paths and some of the potential problems that will be encountered with Kirchhoff migration. More complex synthetic models as well as results from actual seismic data from the Gulf of Mexico will be shown.

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4 p.

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OSTI as DE97007802

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  • 67. Society of Exploration Geophysicists international exposition and meeting, Dallas, TX (United States), 2-7 Oct 1997

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  • Other: DE97007802
  • Report No.: SAND--97-1765C
  • Report No.: CONF-971059--1
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 527431
  • Archival Resource Key: ark:/67531/metadc689906

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 14, 2016, 8:01 p.m.

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Ober, C.C.; Oldfield, R.A.; Womble, D.E.; Romero, L.A. & Burch, C.C. Practical aspects of prestack depth migration with finite differences, article, July 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc689906/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.