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Adaptive iterative algorithm for identifying different wave modes in a sonic log

N.L. Kazanskiy1,2, P.G. Serafimovich1,2, S.I. Kharitonov1,2

1 IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS,
443001, Samara, Russia, Molodogvardeyskaya 151,
2 Samara National Research University, 443086, Samara, Russia, Moskovskoye Shosse 34

 PDF,311 kB

Pages: 41-46.

Full text of article: Russian language.

Abstract:
The article proposes a new iterative algorithm allowing to distinguish different types of acoustic waves in case of their overlapping. This algorithm improves on the available iterative methods of computer optics. The article uses the example of a tube wave to demonstrate that the algorithm allows to increase the accuracy of estimating the attenuation of an acoustic wave measured by a small number of receivers by 15-20% as compared to the homomorphic algorithm. The peculiarities of the algorithm are that the estimated parameters are optimized in both time and frequency planes, and also that the procedure for adapting the algorithm is available during the iterative process. This, on the one hand, provides high resistance of the algorithm to the initial data distortions caused by overlapping of various types of waves or registration errors, and, on the other hand, it allows to perform dispersion analysis of wave modes.

Keywords:
iterative algorithm, sonic log, acoustic wave, computer optic, homomorphic algorithm, dispersion analysis, wave mode.

Citation:
Kazanskiy NL, Serafimovich PG, Kharitonov SI. Adaptive iterative algorithm for identifying different wave modes in a sonic log. Computer Optics 2001; 22: 41-46.

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