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Constant normal‐moveout (CNMO) correction: a technique and test results [Note 1. Received October 1998, revision accepted September 1999. ...]
Author(s) -
Shatilo Andrew,
Aminzadeh Fred
Publication year - 2000
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.1365-2478.2000.00190.x
Subject(s) - normal moveout , stack (abstract data type) , offset (computer science) , geology , economic geology , reflection (computer programming) , constant (computer programming) , wavelet , interference (communication) , algorithm , computer science , seismology , telmatology , artificial intelligence , tectonics , programming language , computer network , channel (broadcasting)
We introduce a processing technique which minimizes the ‘stretching effects’ of conventional NMO correction. Unlike conventional NMO, the technique implies constant normal moveout (CNMO) for a finite time interval of a seismic trace. The benefits of the proposed method include preservation of higher frequencies and reduction of spectral distortions at far offsets. The need for severe muting after the correction is reduced, allowing longer spreads for stack, velocity and AVO analysis. The proposed technique has been tested on model and real data. The method may improve the resolution of CMP stack and AVO attribute analysis. The only assumptions for this stretch‐free NMO correction are (i) all time samples of a digital reflected wavelet at a particular offset have the same normal moveout, and (ii) reflection records have an interference nature.