Spectral Inversion in Estimation of Change in the Dominant Frequency of the Wave Field

Fedor Krasnov, Alexander Butorin

Abstract


This article proposes a method of estimating the dominant frequency of a wave field along a seismic trace, developed on the basis of the spectral inversion method. The basis of the proposed algorithm is the estimation of the dominant frequency from the results of approximation of the seismic trace by wavelets from the given library. The study described was to determine the basic requirements for the formation of the wavelet library, as well as to assess the sensitivity and stability of the proposed algorithm under conditions of different contrast values at the dominant frequency, and the level of additive random interference.

The practical value of the proposed approach is to obtain additional characteristics of the observed wave field for the purpose of geological interpretation of seismic data. Among the key factors influencing the changes in the dominant frequency are: the absorbing characteristics of the medium, depending on the structure of the object under study, the interference effects that lead to a change in the frequency of the total pulse, and the influence of fracturing.

As a result of the research, practical recommendations for the implementation of the proposed algorithm are provided, as well as the sensitivity and noise immunity of the method.

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References


Butorin A.V., Krasnov F.V. "The comparative analysis of methods of spectral inversion on the example of model routes"//Geophysics. 2016. No. 4. page 42-47

Butorin A.V., Krasnov F.V. "Possibilities of use of results of spectral inversion in case of interpretation of seismic data"//Geophysics. 2017. No. 4. page 43-49

Granichin O.N. "Randomization of measurements and L1 optimization", St.Petersburg State University, 2009

Lukovenkova O.O. "Comparison of methods of the rarefied approximation on the example of signals of geoakustichseky issue", the KRAUNTs Bulletin. Physical. - a mat. sciences. 2014. No. 2(9). C. 59-67. ISSN 2079-6641

Yagola A.G. Return tasks and methods of their decision. Applications to geophysics / A.G. Yagola, Van Yanfey, I.E. Stepanova, V.N. Titarenko / - M.: BINOMIAL. Laboratory of knowledge, 2014.-216 pages.

Castagna, J. P., S. Sun, R. W. Siegfried «Instantaneous spectral analysis: Detection of low frequency shadows associated with hydrocarbons» // The Leading Edge, 22, 2003, p.120–127.

Giroldi, L. and F. Alegria. “Using spectral decomposition to identify and characterize glacial valleys and fluvial channels within the Carboniferous section in Bolivia.” // The Leading Edge, vol. 24, 2005, p.1152–1159.

Li, Y., X. Zheng, and Y. Zhang. “High-frequency anomalies in carbonate reservoir characterization using spectral decomposition.” // Geophysics, vol. 76, 2011, p.V47–V57.

Mallat, S., and Z. Zhang, 1992, Matching pursuit with time-frequency dictionaries: Technical Report 619, IEEE Transactions in Signal Processing, 41, 3397-3415.

Tai S., C. Puryer, J. Castagna «Local frequency as a direct hydrocarbon indicatior» // SEG Houston 2009 International Exposition and Annual Meeting

Reine, C., M. van der Baan, and R. Clark. “The robustness of seismic attenuation measurements using fixed- and variable-window time-frequency transforms.” // Geophysics, vol. 74, 2009, p. WA123–WA135.

Castagna, J. P., S. Sun, R. W. Siegfried «Instantaneous spectral analysis: Detection of low frequency shadows associated with hydrocarbons» // The Leading Edge, 22, 2003, p.120–127.


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