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Abstract

Summary

Understanding the fluid distribution heterogeneity on the seismic wave dispersion and attenuation is critical for reliable fluids identification and quantitative saturation prediction from seismic data. This study constructs 1D digital rock models with layering water-gas distribution patterns, and uses numerical simulation methods based on quasi-static Biot’s poroelastic equation to investigate the elastic wave velocity dispersion and attenuation characteristics. The results show that, in addition to fluid saturation, the thickness and distribution patterns of fluid layers significantly affect the wave velocity and attenuation characteristics within the seismic frequency band. Specifically, given the same saturation, thinner and more numerous water layers lead to a decrease in wave velocity and shift the peak attenuation to higher frequencies, while thicker water layers result in an increase of velocity. We also establish the velocity-saturation and attenuation-saturation relationship for varying fluid distribution pattern and thickness, offering guidance for quantitative saturation prediction from seismic data.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.2025101099
2025-06-02
2026-02-11

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References

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/content/papers/10.3997/2214-4609.2025101099
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The Influences of Fluid Distribution Heterogeneity on Seismic Wave Dispersion and Attenuation Signatures
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.2025101099
/content/papers/10.3997/2214-4609.2025101099
/content/papers/10.3997/2214-4609.2025101099
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