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Sensitivity Seismic Attenuation Estimation Using the Sublimated Centroid Frequency Shift Method
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DOI：10.1109/TGRS.2025.3621617.png)
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Abstract
En 中文
Seismic attenuation is an important reservoir characteristic, as it is highly sensitive to changes in rock pore fluids. The sensitivity of attenuation makes it a valuable parameter for monitoring reservoir dynamics. This article presents an advanced method for quality factor ( $Q$ ) estimation and attenuation difference (AD) estimation, which builds upon the frequency-independent centroid frequency shift (FiCFS) and divergence-based centroid frequency shift (CFS) methods. In contrast to conventional $Q$ value estimation techniques, our approach provides frequency independence, enhanced noise immunity, and heightened sensitivity to minor attenuation variations. This method addresses the issues associated with centroid frequency discrepancies and simplifies the calculations by eliminating the necessity for traveltime differences. The superiority of the noise immunity and amplification effect of AD estimation is demonstrated by synthetic data experiments, which also facilitate easier monitoring of reservoir changes. The efficacy of this method is validated through the CO2 injection monitoring at the Frio II site, which demonstrates its ability to detect fluid changes within the reservoir. The in-depth analysis of variance, divergence, and centroid frequency difference reveals the direct impact of these disparate methodologies and substantiates the sublimation of the novel approach.
Keywords:
Centroid frequency shift (CFS)
CO2 and H2 storage
Q value estimation
reservoir monitoring
seismic attenuation
Journal
IF:
8.6
Papers:
2.1W
Citations:
10.7W
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