Seismoelectric effects due to mesoscopic heterogeneities

Jougnot, Damien; Rubino, J. Germán; Rosas‐Carbajal, Marina; Linde, Niklas; Holliger, Klaus

doi:10.1002/grl.50472

Cited by 36 publications

(40 citation statements)

References 18 publications

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“…Among these works, Jardani et al () propose the following empirical relationship

\log_{10} false({\overset{Q}{true}}_{v}^{REV} false) = A_{1} + A_{2} \log_{10} false(k false),

where A 1 =−9.2349 and A 2 =−0.8219 are constant values obtained by fitting equation to a large set of experimental data that includes various lithologies and ionic concentrations. It has been widely used for SP (e.g., Jardani & Revil, ; Linde et al, ; Roubinet et al, ; Soueid Ahmed et al, ) and seismoelectrics (e.g., Jougnot et al, ; Monachesi et al, ; Revil et al, ) applications.…”

Section: Theory Of Streaming Current Generationmentioning

confidence: 99%

Exploring the Effect of the Pore Size Distribution on the Streaming Potential Generation in Saturated Porous Media, Insight From Pore Network Simulations

et al. 2019

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Understanding streaming potential generation in porous media is of high interest for hydrological and reservoir studies as it allows to relate water fluxes to measurable electrical potential distributions. This streaming potential generation results from an electrokinetic coupling due to the presence of an electrical double layer developing at the interface between minerals and pore water. Therefore, the pore sizes of the porous medium are expected to play an important role in the streaming potential generation. In this work we use 2‐D pore network simulations to study the effect of the pore size distribution upon this electrokinetic mechanism. Our simulations allow a detailed study of the influence of a large range of permeabilities (from 10−16 to 10−10 m2) for different ionic concentrations (from 10−4 to 1 mol/L). We then use and compare two different approaches that have been used over the last decades to model and interpret the streaming potential generation: the classical coupling coefficient or the effective excess charge density, which has been defined recently. Our results show that the four pore size distributions tested in the present work have a restricted influence on the coupling coefficient for ionic concentration smaller than 10−3 mol/L while it completely drives the behavior of the effective excess charge density over orders of magnitude. Then, we use these simulation results to test an analytical model based on a fractal pore size distributions. This model predicts well the effective excess charge density for all pore size distributions under the thin double layer assumption.

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“…Among these works, Jardani et al () propose the following empirical relationship

\log_{10} false({\overset{Q}{true}}_{v}^{REV} false) = A_{1} + A_{2} \log_{10} false(k false),

Section: Theory Of Streaming Current Generationmentioning

confidence: 99%

Exploring the Effect of the Pore Size Distribution on the Streaming Potential Generation in Saturated Porous Media, Insight From Pore Network Simulations

et al. 2019

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“…Typical seismo-electromagnetic laboratory wave propagation experiments (Schakel et al 2011;Smeulders et al 2014;Zhu et al 2000;Zhu & Toksöz 2005) make use of these ultrasonic frequencies due to the small scale of the experiments. Wave-induced fluid flow modelling for laboratory experiments is recently further addressed by Jougnot et al (2013): using numerical simulations of oscillatory compressibility tests coupled to a model for seismo-electromagnetic conversion in the quasi-static approach, they demonstrate that mesoscopic heterogeneities can produce measurable seismo-electromagnetic signals for typical laboratory configurations. Their experiments show that the frequency range, in combination with the size of the heterogeneities under consideration, plays an important role in the signal measurability.…”

Section: Discussionmentioning

confidence: 99%

Comparison of eigenvectors for coupled seismo-electromagnetic layered-Earth modelling

Grobbe¹,

Slob²,

Thorbecke³

2016

Geophys. J. Int.

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“…This phenomenon is quite different from that introduced by Müller and Rothert () and Jougnot et al . (), in which the induced fluid flux is negligible at low frequencies, whereas the fluid pressure increases significantly at relatively high frequencies. However, these two phenomena are not contrary.…”

Section: Interaction Of Fluid Flux At the Local Scalementioning

confidence: 99%

“…However, the oscillatory test used in the simulation was set for a single frequency rather than the whole process (Jougnot et al . ; Müller and Rothert ), allowing us to observe two versions of fluid flux in two types of simulations.…”

Section: Interaction Of Fluid Flux At the Local Scalementioning

confidence: 99%

“…In this paper, we use the creep test, in which the fluid flux is based on the whole process of the time duration; therefore, the fluid flux at low frequency corresponds to the fluid flux at the final stage of the diffusion process, whereas the fluid flux in the high frequency band corresponds to that at the initial stage of the diffusion process (Müller and Rothert 2006). However, the oscillatory test used in the simulation was set for a single frequency rather than the whole process (Jougnot et al 2013;Müller and Rothert 2006), allowing us to observe two versions of fluid flux in two types of simulations.…”

Section: Synthetic Rock Samples With One Course Of Wiffmentioning

confidence: 99%

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Interaction of multiple courses of wave‐induced fluid flow in layered porous media

Cao

Zhang

Pan

2016

Geophysical Prospecting

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Different theoretical and laboratory studies on the propagation of elastic waves in layered hydrocarbon reservoir have shown characteristic velocity dispersion and attenuation of seismic waves. The wave‐induced fluid flow between mesoscopic‐scale heterogeneities (larger than the pore size but smaller than the predominant wavelengths) is the most important cause of attenuation for frequencies below 1 kHz. Most studies on mesoscopic wave‐induced fluid flow in the seismic frequency band are based on the representative elementary volume, which does not consider interaction of fluid flow due to the symmetrical structure of representative elementary volume. However, in strongly heterogeneous media with unsymmetrical structures, different courses of wave‐induced fluid flow may lead to the interaction of the fluid flux in the seismic band; this has not yet been explored. This paper analyses the interaction of different courses of wave‐induced fluid flow in layered porous media. We apply a one‐dimensional finite‐element numerical creep test based on Biot's theory of consolidation to obtain the fluid flux in the frequency domain. The characteristic frequency of the fluid flux and the strain rate tensor are introduced to characterise the interaction of different courses of fluid flux. We also compare the behaviours of characteristic frequencies and the strain rate tensor on two scales: the local scale and the global scale. It is shown that, at the local scale, the interaction between different courses of fluid flux is a dynamic process, and the weak fluid flux and corresponding characteristic frequencies contain detailed information about the interaction of the fluid flux. At the global scale, the averaged strain rate tensor can facilitate the identification of the interaction degree of the fluid flux for the porous medium with a random distribution of mesoscopic heterogeneities, and the characteristic frequency of the fluid flux is potentially related to that of the peak attenuation. The results are helpful for the prediction of the distribution of oil–gas patches based on the statistical properties of phase velocities and attenuation in layered porous media with random disorder.

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Seismoelectric effects due to mesoscopic heterogeneities

Cited by 36 publications

References 18 publications

Exploring the Effect of the Pore Size Distribution on the Streaming Potential Generation in Saturated Porous Media, Insight From Pore Network Simulations

Exploring the Effect of the Pore Size Distribution on the Streaming Potential Generation in Saturated Porous Media, Insight From Pore Network Simulations

Comparison of eigenvectors for coupled seismo-electromagnetic layered-Earth modelling

Interaction of multiple courses of wave‐induced fluid flow in layered porous media

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