Seismoacoustic signatures of fracture connectivity

Wave-induced fluid flow (WIFF) between fractures and the embedding matrix as well as within connected fractures tends to produce significant seismic attenuation and velocity dispersion. While WIFF between fractures and matrix is well understood, the corresponding effects related to fracture connecti...

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Autores principales: Rubino, Jorge Germán, Müller, Tobias M., Guarracino, Luis, Milani, Marco, Holliger, Klaus
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Geofísica
Acoustic properties
Fracture and flow
Seismic methods
Wave attenuation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/98796
https://ri.conicet.gov.ar/11336/31406
http://onlinelibrary.wiley.com/doi/10.1002/2013JB010567/abstract
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-98796
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geofísica
Acoustic properties
Fracture and flow
Seismic methods
Wave attenuation
spellingShingle Geofísica
Acoustic properties
Fracture and flow
Seismic methods
Wave attenuation
Rubino, Jorge Germán
Müller, Tobias M.
Guarracino, Luis
Milani, Marco
Holliger, Klaus
Seismoacoustic signatures of fracture connectivity
topic_facet Geofísica
Acoustic properties
Fracture and flow
Seismic methods
Wave attenuation
description Wave-induced fluid flow (WIFF) between fractures and the embedding matrix as well as within connected fractures tends to produce significant seismic attenuation and velocity dispersion. While WIFF between fractures and matrix is well understood, the corresponding effects related to fracture connectivity and the characteristics of the energy dissipation due to flow within fractures are largely unexplored. In this work, we use oscillatory relaxation simulations based on the quasi-static poroelastic equations to study these phenomena. We first consider synthetic rock samples containing connected and unconnected fractures and compute the corresponding attenuation and phase velocity. We also determine the relative fluid displacement and pressure fields in order to gain insight into the physical processes involved in the two manifestations of WIFF in fractured media. To quantify the contributions of the two WIFF mechanisms to the total seismic attenuation, we compute the spatial distribution of the local energy dissipation. Finally, we perform an exhaustive sensitivity analysis to study the role played by different characteristics of fracture networks on the seismic signatures. We show that in the presence of connected fractures both P wave attenuation and phase velocity are sensitive to some key characteristics of the probed medium, notably to the lengths, permeabilities, and intersection angles of the fractures as well as to the overall degree of connectivity of the fracture network. This, in turn, indicates that a deeper understanding of these two manifestations of WIFF in fractured media may eventually allow for the extraction of some of these properties from seismic data.
format Articulo
Articulo
author Rubino, Jorge Germán
Müller, Tobias M.
Guarracino, Luis
Milani, Marco
Holliger, Klaus
author_facet Rubino, Jorge Germán
Müller, Tobias M.
Guarracino, Luis
Milani, Marco
Holliger, Klaus
author_sort Rubino, Jorge Germán
title Seismoacoustic signatures of fracture connectivity
title_short Seismoacoustic signatures of fracture connectivity
title_full Seismoacoustic signatures of fracture connectivity
title_fullStr Seismoacoustic signatures of fracture connectivity
title_full_unstemmed Seismoacoustic signatures of fracture connectivity
title_sort seismoacoustic signatures of fracture connectivity
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/98796
https://ri.conicet.gov.ar/11336/31406
http://onlinelibrary.wiley.com/doi/10.1002/2013JB010567/abstract
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AT mullertobiasm seismoacousticsignaturesoffractureconnectivity
AT guarracinoluis seismoacousticsignaturesoffractureconnectivity
AT milanimarco seismoacousticsignaturesoffractureconnectivity
AT holligerklaus seismoacousticsignaturesoffractureconnectivity
bdutipo_str Repositorios
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