Coupling: Impact and Implications for High-Resolution Time-Lapse Seismic Surveying
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Issue Date
2008-07-28Author
Walters, Shelby Lynn
Publisher
University of Kansas
Format
87 pages
Type
Thesis
Degree Level
M.S.
Discipline
Geology
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This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
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Show full item recordAbstract
Attention to specific parameters can minimize inconsistency in source and receiver coupling thereby minimizing changes in spectral characteristics of time-lapse seismic data related to the near surface. This study concludes that the most repeatable Vibroseis source station terrains are firm, unconsolidated sediments that result in 80% shot-to-shot similarity. The least repeatable Vibroseis source station terrains are compacted sediments, resulting in 36% shot-to-shot similarity. Changes in energy containment, transmission, and spectral characteristics of recorded wavefield components occur with repeat shots from downhole projectile sources and appear to be associated with plastic deformation of hole wall sediment. Changes in hole wall sediment conditions with repeat shots has a different effect on surface waves and compressional waves. This observation has potential application to wavefield separation. Acquisition approaches typically used to optimize 2D or 3D high-resolution seismic surveys may reduce repeatability of high-resolution time-lapse data.
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- Geology Dissertations and Theses [232]
- Theses [3940]
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