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Crooked line, rough topography: advancing towards the correct seismic image [Note 1. Paper presented at the 58th EAGE Conference — Geophysical ...]
Author(s) -
Gray Samuel H.,
Maclean Gary,
Marfurt Kurt J.
Publication year - 1999
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1046/j.1365-2478.1999.00143.x
Subject(s) - geology , regional geology , data processing , environmental geology , line (geometry) , economic geology , quality (philosophy) , thrust , image processing , seismology , geodesy , remote sensing , geophysics , image (mathematics) , computer science , geometry , telmatology , computer vision , mathematics , tectonics , philosophy , physics , thermodynamics , epistemology , operating system
Seismic exploration in mountainous areas imposes serious compromises on both acquisition and processing. Access restrictions usually result in profiles that are not straight and are not recorded along the true dip direction (if there is a true dip direction!). Processing constraints often result in very poor approximate corrections for elevations and for deviations from a straight line. Most fundamentally, 2D acquisition and processing assumes that the earth is 2D; this assumption is often seriously violated in mountainous areas. While we cannot efficiently correct 2D seismic data for the effects of a fully 3D subsurface, we can improve the data quality in thrust areas where the assumption of 2D subsurface variation is reasonable. We do this in a series of small steps, which improves the accuracy of several approximations made in processing 2D land data.