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Resistivity imaging of shallow salt with magnetotellurics as an aid to prestack depth migrationGreen Open Access

Authors: E. den Boer, J. Eikelboom, P. van Driel and D. Watts
Journal name: First Break
Issue: Vol 18, No 1, January 2000 pp. 19 - 26
DOI: 10.1046/j.1365-2397.2000.181047.x
Language: English
Info: Article, PDF ( 4Mb )

Summary:
Currently NAM (Nederlandse Aardolie Maatschappij B.V.) is undertaking a large Pre-Stack Depth Migration (Pre-SDM) campaign over several salt-related prospects in the Netherlands, two of which, Broek and Ommelanderwijk, are located in fig. 1. To build proper Pre-SDM models of salt domes it is essential to have accurate knowledge of the geology in the shallow subsurface. Using data acquired in a conventional 3D seismic acquisition geometry, with typical 400-500 m line spacing, it is often difficult to image the top of shallow salt domes accurately in the 0-500 m depth range. This problem can be seen clearly in Fig. 2, where a seismic section through the Broek salt dome is displayed.

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