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Application of Iterative Least-Squares Migration in Different Geological SettingsNormal access

Authors: Ø. Korsmo, S. Arasanipalai and Z. Greplowsk
Event name: 81st EAGE Conference and Exhibition 2019
Session: Imaging Case Studies II
Publication date: 03 June 2019
DOI: 10.3997/2214-4609.201901188
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 947.71Kb )
Price: € 20

Summary:
Least-squares migration has over the last few years become the new standard in high-end seismic imaging. In this paper we utilize iterative least-squares migration in different geological settings from shallow complex structures to deeper sub-chalk and sub-salt targets. We evaluate how least-squares migration can improve the wavenumber content, suppress illumination effects from acquisition design and velocity anomalies and reveal finer structural detail compared to conventional migration. By utilizing the one-way extrapolators, the inversions can be done for the full frequency range supported by the data at an acceptable cost.


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