Electrokinetic effects in fluid-saturated poroelastic media

Neev, Joseph; Yeatts, F. Richard

doi:10.1103/physrevb.40.9135

Cited by 63 publications

(32 citation statements)

References 6 publications

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“…This is within a factor of three of the measured amplitude of 3.8 mV/m. Thus, given the uncertainty in the values of t and z, the quasi-static theory of Neev and Yeatts [1989] seems to provide a reasonable explanation for the origins of the co-seismic seismoelectric signals observed in this case.…”

Section: Validation Of a Theoretical Modelmentioning

confidence: 99%

“…Garambois and Dietrich [2001] reported that co-seismic seismoelectric signal strengths measured at surface were consistent with predictions based on a low frequency form of that theory. In this case, we compare our borehole measurements to an alternative model, developed by Neev and Yeatts [1989] which has received less attention in the literature. The model is simpler and less general than that of Pride and Haartsen [1996] in that it ignores electromagnetic effects and any frequency dependence of physical properties.…”

Section: Validation Of a Theoretical Modelmentioning

confidence: 99%

“…[19] The transfer function, given by Neev and Yeatts [1989] in non-dimensional form, relating co-seismic seismoelectric effects to P-wave particle motions in the low frequency limit may be expanded as follows [Butler, 1996]:…”

Section: Validation Of a Theoretical Modelmentioning

confidence: 99%

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Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Dupuis¹,

Butler²

2006

Geophysical Research Letters

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[1] Seismoelectric signals have been measured as a function of depth in a borehole penetrating glaciofluvial sands, silts, and glacial till using a broadband surface seismic source, and a downhole electrode array. Transient electric field pulses, with amplitudes of 1 to 4 mV/m accompanied the arrival of seismic P-waves at the electrodes but no simultaneous interfacial signals were observed above the noise floor of approximately 0.2 mV/m. The co-seismic effect was strongest in a sand and gravel layer where its amplitude is consistent with the predictions of a simplified theoretical model. Normalization of the amplitude logs by measurements of seismic particle velocity and electrical conductivity enhanced their sensitivity to changes in lithology and porosity. The results of this experiment suggest that co-seismic seismoelectric effects show potential as a porosity/permeability logging tool in the borehole environment.

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Section: Validation Of a Theoretical Modelmentioning

confidence: 99%

Section: Validation Of a Theoretical Modelmentioning

confidence: 99%

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Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Dupuis¹,

Butler²

2006

Geophysical Research Letters

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“…To study these phenomena in poroelasticity at a macroscopic scale, the average acoustic and electromagnetic fields in the presence of a complex network of capillaries must be determined. Previous models of seismoelectric phenomena in geophysics [Frenkel, 1944;Fitterman, 1978;Auriault and Strzekecki, 1981;Neev and Yeats, 1989] and colloidal chemistry [O'Brien, 1988] did not use the full set of Maxwell's equations and/or limited their scope to the lowfrequency case. They therefore failed to predict key theoretical and experimental behaviors-such as EM wave generation at a fluid-sediment interface caused by a highfrequency, incident acoustic wave-that are a robust feature in our experimental data.…”

Section: Electric Double Layermentioning

confidence: 99%

Conductivity dependence of seismoelectric wave phenomena in fluid‐saturated sediments

Block¹,

Harris²

2006

J. Geophys. Res.

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[1] Seismoelectric phenomena in sediments arise from acoustic wave-induced fluid motion in the pore space, which perturbs the electrostatic equilibrium of the electric double layer on the grain surfaces. Experimental techniques and the apparatus built to study the conductivity dependence of the electrokinetic (EK) effect are described, and outcomes for studies in loose glass microspheres and medium-grain sand are presented. By varying the NaCl concentration in the pore fluid, we measured the conductivity dependence of two kinds of EK behavior: (1) the electric fields generated within the samples by the passage of transmitted acoustic waves and (2) the electromagnetic waves produced at the fluid-sediment interface by the incident acoustic wave. Both phenomena are caused by relative fluid motion in the sediment pores; this feature is characteristic of poroelastic (Biot) media but is not predicted by either viscoelastic fluid or solid models. A model of plane wave reflection from a fluid-sediment interface using EK-Biot theory leads to theoretical predictions that compare well to the experimental data for both loose glass microspheres and medium-grain sand.Citation: Block, G. I., and J. G. Harris (2006), Conductivity dependence of seismoelectric wave phenomena in fluid-saturated sediments,

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“…providing nonnegativity of the entropy production rate is also satisfied automatically [26] due to the representation formulas (36) and (37). The inequality (38) becomes equality if both the diffusion coefficients i are negligible.…”

Section: Electrokinetic Coupling Coefficientsmentioning

confidence: 99%

The Electrokinetic Cross-Coupling Coefficient: Two-Scale Homogenization Approach

Shelukhin¹,

Yeltsov²,

Paranichev³

2011

WJM

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By the two-scale homogenization approach we justify a two-scale model of ion transport through a layered membrane, with flows being driven by a pressure gradient and an external electrical field. By up-scaling, the electroosmotic flow equations in horizontal thin slits separated by thin solid layers are approximated by a homogenized system of macroscale equations in the form of the Poisson equation for induced vertical electrical field and Onsager's reciprocity relations between global fluxes (hydrodynamic and electric) and forces (horizontal pressure gradient and external electrical field). In addition, the two-scale approach provides macroscopic mobility coefficients in the Onsager relations. On this way, the cross-coupling kinetic coefficient is obtained in a form which does involves the  -potential among the data provided the surface current is negligible.

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Electrokinetic effects in fluid-saturated poroelastic media

Cited by 63 publications

References 6 publications

Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Conductivity dependence of seismoelectric wave phenomena in fluid‐saturated sediments

The Electrokinetic Cross-Coupling Coefficient: Two-Scale Homogenization Approach

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