Rock critical porosity inversion and S-wave velocity prediction

Zhang, Jia-Jia; Li, Hongbing; Yao, Fengchang

doi:10.1007/s11770-012-0314-8

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…Finally, this study demonstrates the applicability of ambient seismic noise tomography to other karst and nonkarstic aquifer systems, as the location and extent of zones of high and low porosity and permeability are reflected by low and high seismic velocities, respectively (e.g., Zhang et al., 2023). The ability of the method to characterize the continuity of aquifer units can have far‐reaching implications toward local and regional groundwater studies, such as groundwater interactions between aquifer units, especially where well data are limited.…”

Section: Discussionmentioning

confidence: 61%

“…The results have significant implications for understanding and managing the FAS, including improved knowledge of the relationship between the upper and lower Floridan aquifers and identifying previously unknown features. In addition, the seismic velocities obtained in the study can constrain the aquifer's mechanical and hydraulic properties and have implications for groundwater flow modeling and resource management (e.g., Zhang et al., 2023). Limitations of the study include array design constraints, noise source bias, frequency‐dependent dispersion measurements, and the inability to resolve small features like conduits, which require complementary geophysical methods.…”

Section: Discussionmentioning

confidence: 99%

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Ambient Seismic Noise Tomography Within the Floridan Aquifer System, Santa Fe River‐Sink Rise, Florida, US

Gochenour,

Bilek,

Woo

et al. 2024

JGR Solid Earth

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This study utilized ambient seismic noise tomography to investigate correlations of hydrogeological systems with heterogeneous porosity with the internal velocity structure of karst aquifers using the Floridan Aquifer System (FAS) as an example. We conducted a seismic signal analysis with 30 days of vertical component seismic data acquired within the Santa Fe River Sink‐Rise system (Sink‐Rise System), using power spectral density estimates and frequency‐wavenumber analysis to identify any noise source biases. Empirical Green's functions were derived through phase cross‐correlations and phase‐weighted stacking. The functions allowed extraction of group velocity dispersion measurements, which were inverted to generate 2D tomographic images at various periods. Tomographic images show multiple layers with varying group velocities that aligned with known hydrogeological features of the FAS, including its base, low‐porosity and low‐permeability dolostone semiconfining units characterized by elevated velocities, and zones of elevated porosity from karstification with reduced seismic velocities. Our results show how ambient seismic noise can be used to evaluate aquifer physical properties, identify unknown features, and identify the location and continuity of aquifer units.

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Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Ambient Seismic Noise Tomography Within the Floridan Aquifer System, Santa Fe River‐Sink Rise, Florida, US

Gochenour,

Bilek,

Woo

et al. 2024

JGR Solid Earth

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“…Nur () presented that critical porosity of the rock is fixed value, and that of the rock of the same lithology is the same, for example, sandstone

ϕ_{normalc} = 0.4

. Zhang, Li and Yao () found that S‐wave velocities of Han's sandstones (1986) under low pressure are overestimated by taking empirical critical porosity value. While those under high pressure are also estimated well by taking empirical critical porosity value, in practice it is hard to obtain an accurate critical porosity value.…”

Section: Introductionmentioning

confidence: 99%

“…And it may cause errors when simply taking an empirical critical porosity value. Zhang et al (2012) proposed a method to obtain the critical porosity value by inverting Pwave velocity, but the specific function relational expression is not given.…”

Section: Introductionmentioning

confidence: 99%

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Rock physics modelling of porous rocks with multiple pore types: a multiple‐porosity variable critical porosity model

Zhang

Yingyao

Zhang

2019

Geophysical Prospecting

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A B S T R A C TA critical porosity model establishes the empirical relationship between a grain matrix and a dry rock by the concept of critical porosity. The model is simple and practical and widely used. But the critical porosity in the model is a fixed value that cannot relate to pore structure. The aim of this paper is to establish the theoretical relationship between critical porosity and pore structure by combining Kuster-Toksöz theory with the critical porosity model. Different from the traditional critical porosity model, critical porosity is not an empirical value but varied with pore shape and the ratio of bulk modulus versus shear modulus of the grain matrix. The substitution of the theoretical relationship into Kuster-Toksöz theory will generate the formulae for the bulk and shear moduli of multiple-porosity dry rocks, which is named the multipleporosity variable critical porosity model. The new model has been used to predict elastic moduli for sandstone and carbonate rock. We compare the modelling results for P-and S-wave velocities and elastic moduli with the experimental data. The comparison shows that the new model can be used to describe the elastic properties for the rocks with multiple pore types.

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Assessing Crack-Induced Compliance in Low Porosity Rocks Damaged by Thermo-Hydro-Chemo-Mechanical Processes

Clark

Vanorio

Радостин

et al. 2021

Preprint

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Rock critical porosity inversion and S-wave velocity prediction

Cited by 13 publications

References 17 publications

Ambient Seismic Noise Tomography Within the Floridan Aquifer System, Santa Fe River‐Sink Rise, Florida, US

Ambient Seismic Noise Tomography Within the Floridan Aquifer System, Santa Fe River‐Sink Rise, Florida, US

Rock physics modelling of porous rocks with multiple pore types: a multiple‐porosity variable critical porosity model

Assessing Crack-Induced Compliance in Low Porosity Rocks Damaged by Thermo-Hydro-Chemo-Mechanical Processes

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