Mitigation of defocusing by statics and near-surface velocity errors by interferometric least-squares migration
KAUST DepartmentEarth Science and Engineering Program
Physical Sciences and Engineering (PSE) Division
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AbstractWe propose an interferometric least-squares migration method that can significantly reduce migration artifacts due to statics and errors in the near-surface velocity model. We first choose a reference reflector whose topography is well known from the, e.g., well logs. Reflections from this reference layer are correlated with the traces associated with reflections from deeper interfaces to get crosscorrelograms. These crosscorrelograms are then migrated using interferometric least-squares migration (ILSM). In this way statics and velocity errors at the near surface are largely eliminated for the examples in our paper.
CitationMrinal Sinha* and Gerard T. Schuster (2015) Mitigation of defocusing by statics and near-surface velocity errors by interferometric least-squares migration. SEG Technical Program Expanded Abstracts 2015: pp. 4254-4258. doi: 10.1190/segam2015-5858700.1
PublisherSociety of Exploration Geophysicists