TY - GEN

T1 - Seismic attenuation mechanisms in fractured fluid saturated media - Numerical and field examples

AU - Caspari, E.

AU - Barbosa, N. D.

AU - Novikov, M.

AU - Lisitsa, V.

AU - Hunziker, J.

AU - Quintal, B.

AU - Rubino, G.

AU - Holliger, K.

N1 - Publisher Copyright: © 81st EAGE Conference and Exhibition 2019 Workshop Programme. All rights reserved.

PY - 2019/6/3

Y1 - 2019/6/3

N2 - A number of different mechanisms can cause attenuation of propagating seismic waves in a fractured fluid-saturated porous medium, notably geometrical spreading, displacement of pore fluid relative to the solid frame, and transmission losses and scattering. In this study, we examine these attenuation mechanisms using numerical forward simulations and a field example. The numerical methods include a quasi-static upscaling approach and wave propagation simulations. They are based on Biot's equations of poroelasticity and, hence, fractures are modeled as soft, highly porous and permeable features. The field examples include full-waveform sonic data from the Grimsel Test Site underground laboratory situated in a granodioritic rock mass, which exhibits both brittle and ductile deformation structures at various scales.

AB - A number of different mechanisms can cause attenuation of propagating seismic waves in a fractured fluid-saturated porous medium, notably geometrical spreading, displacement of pore fluid relative to the solid frame, and transmission losses and scattering. In this study, we examine these attenuation mechanisms using numerical forward simulations and a field example. The numerical methods include a quasi-static upscaling approach and wave propagation simulations. They are based on Biot's equations of poroelasticity and, hence, fractures are modeled as soft, highly porous and permeable features. The field examples include full-waveform sonic data from the Grimsel Test Site underground laboratory situated in a granodioritic rock mass, which exhibits both brittle and ductile deformation structures at various scales.

UR - http://www.scopus.com/inward/record.url?scp=85084021554&partnerID=8YFLogxK

U2 - 10.3997/2214-4609.201901908

DO - 10.3997/2214-4609.201901908

M3 - Conference contribution

AN - SCOPUS:85084021554

VL - 2019

T3 - 81st EAGE Conference and Exhibition 2019 Workshop Programme

SP - 1

EP - 5

BT - 81st EAGE Conference and Exhibition 2019 Workshop Programme

PB - EAGE Publishing BV

T2 - 81st EAGE Conference and Exhibition 2019 Workshop Programme

Y2 - 3 June 2019 through 6 June 2019

ER -