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Seismic migration with inverse Q filtering
Author(s) -
Wang Yanghua,
Guo Jian
Publication year - 2004
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 - 10.1029/2004gl020525
Subject(s) - seismometer , geology , amplitude , seismology , reflection (computer programming) , attenuation , geophysical imaging , inverse , lithosphere , dispersion (optics) , inverse problem , seismic migration , wavenumber , coda , geophysics , tectonics , mathematical analysis , geometry , computer science , optics , physics , mathematics , programming language
Taking account the earth Q effect (i.e., frequency‐dependent amplitude decay and velocity dispersion) during seismic migration simultaneously, the resultant seismic image is expected to be high resolution with true amplitude and correct timing. We present here a stabilized algorithm for such a “migration incorporating inverse Q filtering” scheme, so that the imaging technique is applicable to seismographs with long recording time. The earth model is assumed to be 1‐D with continuous variations vertically in velocity and attenuation, and the imaging algorithm is implemented easily and efficiently in the frequency‐wavenumber domain. Although such a 1‐D model suits mostly to the cases in lithospheric‐scale regional geophysics, it is sometimes also suitable to the exploration seismic studies. The method is demonstrated using a real data example from exploration seismics with an attempt to recover a target reflection underneath a group of strong coal‐seam reflections.