Frequency-Dependent Streaming Potentials

Reppert, Philip M.; Morgan, Frank Dale; Lesmes, David; Jouniaux, Laurence

doi:10.1006/jcis.2000.7294

Cited by 76 publications

(125 citation statements)

References 14 publications

(39 reference statements)

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“…Frequency effect on the coupling coefficient [40][41][42] for the Inada granite with the present experiment system has been reported in [27]. Coupling coefficient does not depend on frequency in such a low frequency range (0.01-1 Hz) for the intact Inada granite.…”

Section: Experimental Methodsmentioning

confidence: 49%

Changes in Electrokinetic Coupling Coefficients of Granite under Triaxial Deformation

Kuwano

Yoshida²

2012

International Journal of Geophysics

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Electrokinetic phenomena are believed to be the most likely origin of electromagnetic signals preceding or accompanying earthquakes. The intensity of the source current due to the electrokinetic phenomena is determined by the fluid flux and the electrokinetic coupling coefficient called streaming current coefficient; therefore, how the coefficient changes before rupture is essential. Here, we show how the electrokinetic coefficients change during the rock deformation experiment up to failure. The streaming current coefficient did not increase before failure, but continued to decrease up to failure, which is explained in terms of the elastic closure of capillary. On the other hand, the streaming potential coefficient, which is the product of the streaming current coefficient and bulk resistivity of the rock, increased at the onset of dilatancy. It may be due to change in bulk resistivity. Our result indicates that the zeta potential of the newly created surface does not change so much from that of the preexisting fluid rock interface.

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Section: Experimental Methodsmentioning

confidence: 49%

Changes in Electrokinetic Coupling Coefficients of Granite under Triaxial Deformation

Kuwano

Yoshida²

2012

International Journal of Geophysics

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“…The electrical fields and mechanical forces which induce the electric current density J e and the fluid flow J f are, respectively, E and (−∇P + iω 2 ρ f u s ), where P is the pore-fluid pressure, u s is the solid displacement, E is the electric field, ρ f is the porefluid density, η f the dynamic viscosity of the fluid [Pa s −1 ], and ω is the angular frequency. The electrokinetic coupling L ek (ω) describes the coupling between the seismic and electromagnetic fields and is complex and frequency-dependent (Pride, 1994;Reppert et al, 2001):…”

Section: Frequency-dependence Electrokineticsmentioning

confidence: 99%

A review on electrokinetically induced seismo-electrics, electro-seismics, and seismo-magnetics for Earth sciences

Jouniaux

Zyserman

2016

Solid Earth

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Abstract. The seismo-electromagnetic method (SEM) can be used for non-invasive subsurface exploration. It shows interesting results for detecting fluids such as water, oil, gas, CO 2 , or ice, and also help to better characterise the subsurface in terms of porosity, permeability, and fractures. However, the challenge of this method is the low level of the induced signals. We first describe SEM's theoretical background, and the role of some key parameters. We then detail recent studies on SEM, through theoretical and numerical developments, and through field and laboratory observations, to show that this method can bring advantages compared to classical geophysical methods.

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“…The electrokinetic coupling L ek (ω) is now complex and frequency-dependent and describes the coupling between the seismic and electromagnetic fields (Pride, 1994;Reppert et al, 2001):…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The transition frequency ω c defined in the Biot's theory separates the viscous and inertial flow domains and depends on the permeability k 0 . The frequency-dependence of the streaming potential coefficient has been studied (Chandler, 1981;Cooke, 1955;Groves & Sears, 1975;Packard, 1953;Reppert et al, 2001;Schoemaker et al, 2007;Sears & Groves, 1978) mainly on synthetic samples. Both models (Gao & Hu, 2010;Garambois & Dietrich, 2001;Haartsen et al, 1998;Haartsen & Pride, 1997;Pain et al, 2005;Schakel & Smeulders, 2010) and laboratory experiments (Block & Harris, 2006;Bordes et al, 2006;Chen & Mu, 2005;Zhu et al, 1999) have been developed on these seismoelectromagnetic conversions.…”

Section: Theoretical Backgroundmentioning

confidence: 99%