A double double-porosity model for wave propagation in patchy-saturated tight sandstone with fabric heterogeneity

Jing Ba; Mengqiu Guo; Wenhao Xu; Fengyuan Sun; Lin Zhang; Wei Cheng

doi:10.1071/ASEG2018abW9_2B

1st Australasian Exploration Geoscience Conference – Exploration Innovation Integration

ISSN: 2202-0586
E-ISSN:

oa A double double-porosity model for wave propagation in patchy-saturated tight sandstone with fabric heterogeneity
Authors Jing Ba^a, Mengqiu Guo^a,b, Wenhao Xu^a,b, Fengyuan Sun^b, Lin Zhang^a,b and Wei Cheng^a,b
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^a Hohai University, , [email protected] ^b Xi’an Jiaotong University
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2018, Issue 1st Australasian Exploration Geoscience Conference – Exploration Innovation Integration, Dec 2018, p. 1 - 6
DOI: https://doi.org/10.1071/ASEG2018abW9_2B
- Published online: 01 Dec 2018

Abstract

In natural reservoir rocks, fabric heterogeneity can further induce heterogeneous geometrical distribution of immiscible multi-phase fluid mixture, since fluid migration may be affected by lithological variation (mainly permeability) in geological time scales, causing patchy saturation of fluids. Both structure heterogeneity and patchy-saturation can lead to strong seismic wave dispersion and attenuation. In this work, a double double-porosity model is presented to describe the overlapping effect of the two heterogeneities on wave dispersion and attenuation. The wave propagation equations are derived from the Hamilton’s principle, and the numerical results for a tight sandstone are compared with corresponding low-frequency experimental data, which shows good agreements. This new model allows for a comprehensive description of wave propagation process in highly complex reservoirs.

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2026-01-25

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References

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Ba, J., L. Zhang, W. Sun, and H. Zhao, 2014, Velocity field of wave-induced local fluid flow in double-porosity media. Science China-Physics: Mechanics & Astronomy, 57, 1020-1030.
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White, J. E., 1975, Computed seismic speeds and attenuation in rocks withpartial gas saturation: Geophysics, 40, 224-232.

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Article Type: Research Article

Keyword(s): a double double-porosity model; fabric heterogeneity; seismic wave dispersion and attenuation; tight sandstone

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oa A double double-porosity model for wave propagation in patchy-saturated tight sandstone with fabric heterogeneity

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