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Iterative Least-Squares Migration in practice, application to a narrow azimuth North Sea datasetNormal access

Authors: Ø. Korsmo and A.A. Valenciano
Event name: First EAGE/SBGf Workshop on Least-Squares Migration
Session: Case Studies
Publication date: 27 November 2018
DOI: 10.3997/2214-4609.201803059
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.4Mb )
Price: € 20

A case study was carried out over the Viking Graben in the North Sea, were Least-Squares Wave-Equation Migration was used to obtain an optimal global image as well as revealing complex and subtle sand systems better than conventional migration. We address two main practical issues with the technology: errors in the background velocity model and cost. Accounting for un-resolved velocity effects in the data and evaluating different reflectivity models as input to the inversion.

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