Electroseismic wave properties

Pride, Steven R.; Haartsen, Matthijs W.

doi:10.1121/1.416018

Cited by 301 publications

(334 citation statements)

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“…Thus, for dipoles contained within a single layer it seems reasonable that the signals may be approximately modelled as if they were in unbounded homogeneous media. Plane wave solutions for fully coupled seismic and electromagnetic waves in homogeneous, poroelastic media have been derived by Pride and Haartsen [1996]. 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.…”

Section: Validation Of a Theoretical Modelmentioning

confidence: 64%

“…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. Plane wave solutions for seismoelectric effects expected to accompany seismic Pwaves were instead derived by treating the problem as quasi-static and modifying Biot's poroelastic equations of motion to account for electric forces that would arise due to electrokinetic coupling.…”

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: 64%

Section: Validation Of a Theoretical Modelmentioning

confidence: 99%

Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Dupuis¹,

Butler²

2006

Geophysical Research Letters

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“…[21] In a uniform material, the fluid accumulations and volume dilatations in the slow wave are exactly related as [e.g., Pride, 2004;Pride and Haartsen, 1996] …”

Section: Fluid-pressure Variationsmentioning

confidence: 99%

Mechanical and electrical response due to fluid‐pressure equilibration following an earthquake

Pride¹

2004

J. Geophys. Res.

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[1] The mechanical and electrical response in a uniform porous crust are determined following a shear dislocation (earthquake) on an internal slip surface. A uniform crust is studied because many exact analytical relations hold between the various response fields in this case. The initial stress field that is created immediately following the earthquake subsequently relaxes through time as the fluid pressure equilibrates by fluid flow. Maps of the electric field generated due to the fluid flow (electrokinetic coupling) are presented. Using conservative estimates of the various parameters involved, electric fields significantly larger than the diurnal (magnetotelluric) fields are generated. Quantitative results for how various components of the stress tensor change due to the fluid equilibration are also presented. The Coulomb stress can easily change by 100% (and more) in the months following an earthquake due to the fluid-pressure equilibration.

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“…In order to simplify this problem, we use the reciprocity theorem (eq. 9) (Pride and Haartsen, 1996;Sahay, 2001), and assume that the average force F 1 acting on the porous medium and fluid force F 2 are similar (Garambois and Dietrich, 2002). This simplification allows us to drop the j index of the Green's functions (eq.…”

Section: Coupled Second-order Equations For Plane P-sv Wavesmentioning

confidence: 99%

First‐order perturbations of the seismic response of fluid‐filled stratified poro‐elastic media

Barros

Dietrich

2006

SEG Technical Program Expanded Abstracts 2006

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SUMMARYWe derive analytical formulas for the first-order effects produced by plane inhomogeneities on the seismic response of a stratified porous medium. The approach used for the derivation is similar to the one employed in the elastic case; it is based on a perturbation analysis of the poro-elastic wave propagation equations. The final forms of the sensitivity operators, which are often referred to as the Fréchet derivatives, are expressed in terms of the Green's functions of the solid and fluid displacements in the frequency-ray parameter domain. We compute here the Fréchet derivatives with respect to eight parameters, namely, the fluid and mineral density and bulk moduli, porosity, permeability, consolidation parameter and shear modulus. The accuracy and stability of the derived expressions are checked by comparing differential seismograms computed from the analytical expressions of the Fréchet derivatives with solutions obtained by introducing discrete perturbations into the model properties. We find that the Fréchet derivative approach is generally accurate for perturbations of the medium properties of up to 10%, and for layer thicknesses less than one fifth of the dominant wavelength.

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Electroseismic wave properties

Cited by 301 publications

References 0 publications

Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Vertical seismoelectric profiling in a borehole penetrating glaciofluvial sediments

Mechanical and electrical response due to fluid‐pressure equilibration following an earthquake

First‐order perturbations of the seismic response of fluid‐filled stratified poro‐elastic media

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