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A geometrical method for migrating 3D or 2.5D seismic reflection data
Author(s) -
Pivot F.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl03273
Subject(s) - reflector (photography) , reflection (computer programming) , geology , amplitude , seismic survey , signal (programming language) , line (geometry) , quality (philosophy) , data processing , computer science , seismology , optics , geometry , physics , mathematics , light source , quantum mechanics , programming language , operating system
Classical processing of 2.5D land seismic surveys has shown to yield unsatisfactory images, even though shot gathers show clear reflections and a good signal to noise ratio. If some major interfaces are easily identified within the stack volume, their 3D geometry remains difficult to appreciate because of a lack of continuity in the cross‐receiver line direction. The theoretical aspects of an alternate method allowing a construction of these 3D structures are presented here. This method geometrically migrates picked reflection traveltimes on good quality shot gathers without amplitude or frequency considerations. It is tested on a synthetic dataset from a 3D smoothly deformed reflector that is well recovered by the technique and applied to major reflections of a 2.5D seismic survey, allowing a successful reconstruction of the reflectors.