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vol 63 / December, 2020
Article

DOI 10.17586/0021-3454-2019-62-6-503-510

UDC 550.832.44

SEMBLANCE FILTERING IN PROCESSING OF WAVE ACOUSTIC LOGGING RECORDS

R. D. Akhmetsafin
Gazprom Georesurs Ltd., Moscow; Deputy Director


R. Z. Akhmetsafina
National Research University “Higher School of Economicsˮ, Moscow;


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Abstract. Semblance or slowness time coherence is a measure of the coherence of energy distribution be-tween recorded signals at antenna array receivers of acoustic wave logging probe in the coordinates "the reduced time of the wave path from the middle of the antenna array” — “interval time". Several semblance filtering methods are proposed to allow for elimination of the effect of aliasing and to separate the wave packet components.
Keywords: multi-element acoustic wave logging, semblance, aliasing, suppression filter, singular value decomposition, non-negative matrix decomposition

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