An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities

Mostrar todas las versiones(2)

The presence of mesoscopic heterogeneities in fluid-saturated porous rocks can produce measurable seismoelectric signals due to wave-induced fluid flow between regions of differing compressibility. The dependence of these signals on the petrophysical and structural characteristics of the probed rock...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Monachesi, Leonardo Bruno, Rubino, Jorge Germán, Rosas Carbajal, Marina, Jougnot, Damien, Linde, Niklas, Quintal, Beatriz, Holliger, Klaus
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Electrical properties
Fracture and flow
Hydrogeophysics
Permeability and porosity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86064
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86064
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Electrical properties
Fracture and flow
Hydrogeophysics
Permeability and porosity
spellingShingle Ciencias Astronómicas
Electrical properties
Fracture and flow
Hydrogeophysics
Permeability and porosity
Monachesi, Leonardo Bruno
Rubino, Jorge Germán
Rosas Carbajal, Marina
Jougnot, Damien
Linde, Niklas
Quintal, Beatriz
Holliger, Klaus
An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities
topic_facet Ciencias Astronómicas
Electrical properties
Fracture and flow
Hydrogeophysics
Permeability and porosity
description The presence of mesoscopic heterogeneities in fluid-saturated porous rocks can produce measurable seismoelectric signals due to wave-induced fluid flow between regions of differing compressibility. The dependence of these signals on the petrophysical and structural characteristics of the probed rock mass remains largely unexplored. In this work, we derive an analytical solution to describe the seismoelectric response of a rock sample, containing a horizontal layer at its centre, that is subjected to an oscillatory compressibility test. We then adapt this general solution to compute the seismoelectric signature of a particular case related to a sample that is permeated by a horizontal fracture located at its centre. Analyses of the general and particular solutions are performed to study the impact of different petrophysical and structural parameters on the seismoelectric response. We find that the amplitude of the seismoelectric signal is directly proportional to the applied stress, to the Skempton coefficient contrast between the host rock and the layer, and to a weighted average of the effective excess charge of the two materials. Our results also demonstrate that the frequency at which the maximum electrical potential amplitude prevails does not depend on the applied stress or the Skempton coefficient contrast. In presence of strong permeability variations, this frequency is rather controlled by the permeability and thickness of the less permeable material. The results of this study thus indicate that seismoelectric measurements can potentially be used to estimate key mechanical and hydraulic rock properties of mesoscopic heterogeneities, such as compressibility, permeability and fracture compliance.
format Articulo
Articulo
author Monachesi, Leonardo Bruno
Rubino, Jorge Germán
Rosas Carbajal, Marina
Jougnot, Damien
Linde, Niklas
Quintal, Beatriz
Holliger, Klaus
author_facet Monachesi, Leonardo Bruno
Rubino, Jorge Germán
Rosas Carbajal, Marina
Jougnot, Damien
Linde, Niklas
Quintal, Beatriz
Holliger, Klaus
author_sort Monachesi, Leonardo Bruno
title An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities
title_short An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities
title_full An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities
title_fullStr An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities
title_full_unstemmed An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities
title_sort analytical study of seismoelectric signals produced by 1-d mesoscopic heterogeneities
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/86064
work_keys_str_mv AT monachesileonardobruno ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT rubinojorgegerman ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT rosascarbajalmarina ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT jougnotdamien ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT lindeniklas ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT quintalbeatriz ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT holligerklaus ananalyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT monachesileonardobruno analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT rubinojorgegerman analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT rosascarbajalmarina analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT jougnotdamien analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT lindeniklas analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT quintalbeatriz analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
AT holligerklaus analyticalstudyofseismoelectricsignalsproducedby1dmesoscopicheterogeneities
bdutipo_str Repositorios
_version_ 1764820489259188224

Ejemplares similares