SINGLE-FREQUENCY BASED SEISMIC ATTRIBUTE USING CONTINUOUS WAVELET TRANSFORM

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ZABIHI EHSAN; SIYAHKOHI HAMIDREZA

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Seminar Paper

Paper Information

Seminar: IRANIAN GEOPHYSICS CONFERENCE
Year:2006 | Issue:12

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Title

SINGLE-FREQUENCY BASED SEISMIC ATTRIBUTE USING CONTINUOUS WAVELET TRANSFORM

Author(s)

ZABIHI EHSAN | SIYAHKOHI HAMIDREZA

Keywords

CWT

TIME-FREQUENCY DOMAIN

SEISMIC ATTRIBUTE

STFT

THIN LAYER

LOW FREQUENCY SHADOW

SPECTROGRAM

SCALOGRAM

Abstract

SPECTRAL DECOMPOSITION IS A POWERFUL TOOL FOR ANALYSIS OF SEISMIC DATA. FOURIER TRANSFORM DETERMINES THE FREQUENCY CONTENTS OF A SIGNAL. BUT FOR ANALYZING OF A NON-STATIONARY SIGNAL, 1-D TRANSFORM TO FREQUENCY DOMAIN IS NOT SUFFICIENT. IN EARLY YEARS, TRANSFORMING OF SEISMIC TRACES INTO TIME AND FREQUENCY DOMAIN WAS DONE VIA WINDOWED FOURIER TRANSFORM, SO CALLED A SHORT TIME FOURIER TRANSFORM (STFT). THE LENGTH OF THE SELECTED WINDOW IN STFT WAS CONFINED THE RESOLUTION OF THE RESULTS IN TIME-FREQUENCY DOMAIN. CONTINUOUS WAVELET TRANSFORM (CWT) WAS A REMEDY TO SOLVE THIS PROBLEM BY USING THE SCALEABLE WAVELETS. THE SCALE IN CWT IS RELATED TO THE FREQUENCY BANDWIDTH OF THE WAVELET AND ITS CONVERSION TO FREQUENCY YIELD TIME-FREQUENCY MAP WHICH IS COMPARABLE TO THE TIME-FREQUENCY MAP OBTAINED FROM STFT. IN THIS STUDY, WE APPLIED CWT ON A SEISMIC SECTION AND EXTRACTED A SINGLE FREQUENCY SEISMIC SECTION FROM THE RESULTED CUBE. THE EXTRACTED SECTIONS WERE USED TO DETECT LOW FREQUENCY SHADOW OF THE HYDROCARBON RESERVES OVER THE STUDY AREA AS WELL AS ANALYZING THE EXISTING THIN LAYERS ON A SYNTHETIC SEISMIC SECTION.

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APA: Copy

ZABIHI, EHSAN, & SIYAHKOHI, HAMIDREZA. (2006). SINGLE-FREQUENCY BASED SEISMIC ATTRIBUTE USING CONTINUOUS WAVELET TRANSFORM. IRANIAN GEOPHYSICS CONFERENCE. SID. https://sid.ir/paper/906513/en

Vancouver: Copy

ZABIHI EHSAN, SIYAHKOHI HAMIDREZA. SINGLE-FREQUENCY BASED SEISMIC ATTRIBUTE USING CONTINUOUS WAVELET TRANSFORM. 2006. Available from: https://sid.ir/paper/906513/en

IEEE: Copy

EHSAN ZABIHI, and HAMIDREZA SIYAHKOHI, “SINGLE-FREQUENCY BASED SEISMIC ATTRIBUTE USING CONTINUOUS WAVELET TRANSFORM,” presented at the IRANIAN GEOPHYSICS CONFERENCE. 2006, [Online]. Available: https://sid.ir/paper/906513/en

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