Energy dissipation of seismic P- and S-waves in fluid-saturated rocks: An overview focusing on hydraulically connected fractures
Artikel i vetenskaplig tidskrift, 2015

An important characteristic of fractured rocks is their high seismic attenuation, which so far has been mainly attributed to wave-induced fluid flow (WIFF) between the fractures and the embedding matrix. The influence of fracture connectivity on seismic attenuation has, however, recently, only been investigated. Numerical compressibility and shear tests based on Biot’s quasi-static poro-elastic equations illustrate that an important manifestation of WIFF arises in the presence of fracture connectivity. The corresponding energy loss, which can be significant for both P- and S-waves, is mainly due to fluid flow within the connected fractures and is sensitive to the permeabilities as well as the lengths and intersection angles of the fractures. Correspondingly, this phenomenon contains valuable information on the governing hydraulic properties of fractured rocks and hence should be accounted for whenever realistic seismic models of such media are needed.

seismic attenuation

fractured rocks

embedding matrix

fracture connectivity

Biot’s theory

WIFF

Författare

J. German Rubino

Beatriz Quintal

Klaus Holliger

Tobias M. Müller

Luis Guarracino

Ralf Jänicke

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Holger Steeb

Journal of Earth Science

1674-487X (ISSN) 1867-111X (eISSN)

Vol. 26 785-790

Ämneskategorier

Teknisk mekanik

Samhällsbyggnadsteknik

DOI

10.1007/s12583-015-0613-0