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Application of 3D Tomography in Alaska's North Slope Transition Zone Province
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 61st EAGE Conference and Exhibition, Jun 1999, cp-132-00227
- ISBN: 978-90-73781-10-8
Abstract
The presence of permafrost near the surface creates special problems for accurate imaging of seismic data. Permafrost thickness can exceed 2000 ft (600 m) onshore and completely disappear offshore, and the high contrast between permafrost velocity and unfrozen sediment velocity produces severe distortions in reflections observed in seismic data.