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Estimation of normal and shear compliance for inclined fractures from full-waveform sonic log data

Autor: Zhenya Zhou, Eva Caspari, Nicolás D Barbosa, Marco Favino, Klaus Holliger

Fractures are ubiquitous throughout the Earth’s upper crust and represent localized zones of mechanical weakness as well as preferential pathways for fluid flow. Correspondingly, their detection and characterization is vital for a wide range of per

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ce658e45f3f9c7df43c542db7e0c2de
https://doi.org/10.5194/egusphere-egu23-3347

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Mechanical Compliance of Individual Fractures in a Heterogeneous Rock Mass From Production‐Type Full‐Waveform Sonic Data

Autor: Zhenya Zhou, Eva Caspari, Nicolás D. Barbosa, Andrew Greenwood, Klaus Holliger

Publikováno v: Journal of Geophysical Research: Solid Earth, vol. 127, no. 8

The mechanical fracture compliance is of interest in a number of geoscientific applications. Seismic borehole methods, especially full-waveform sonic (FWS) data, have indicated their potential to infer the compliance of macroscopic fractures under in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afa8651de1adb5fe138219955d9fcd06
https://doi.org/10.1029/2022jb024302

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Hydro-mechanical coupling in porous rocks: hidden dependences to the microstructure?

Autor: Lucas Xan Pimienta, Eva Caspari, Beatriz Quintal

Publikováno v: Geophysical Journal International. 224:973-984

SUMMARY While hydro-mechanical coupling in rocks is generally well understood, exotic rock poroelastic responses—such as unexpected dependence to fluid diffusion time and low skeleton moduli—have been reported. Hydro-mechanical coupling, or poroe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e735120a4393426eb08a1722ec71f56
https://doi.org/10.1093/gji/ggaa497

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Frequency-dependent attenuation and dispersion caused by squirt flow: Three-dimensional numerical study

Autor: Boris Gurevich, Jürg Hunziker, Beatriz Quintal, Stanislav Glubokovskikh, Eva Caspari, Nicolás D. Barbosa, Yury Alkhimenkov

Publikováno v: GEOPHYSICS, vol. 85, no. 3, pp. MR129-MR145
Geophysics (2020)

Seismic waves may exhibit significant dispersion and attenuation in reservoir rocks due to pore-scale fluid flow. Fluid flow at the microscopic scale is referred to as squirt flow and occurs in very compliant pores, such as grain contacts or microcra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59f3cbd07e99dfdf2d2355ccb3a0b6a1
https://doi.org/10.1190/geo2019-0519.1

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Fully-automated adaptive mesh refinement for media embedding complex heterogeneities: application to poroelastic fluid pressure diffusion

Autor: Rolf Krause, Juerg Hunziker, Beatriz Quintal, Klaus Holliger, Marco Favino, Eva Caspari

Publikováno v: Computational Geosciences, vol. 24, no. 3, pp. 1101-1120

Relating the attenuation and velocity dispersion of seismic waves to fluid pressure diffusion (FDP) by means of numerical simulations is essential for constraining the mechanical and hydraulic properties of heterogeneous porous rocks. This, in turn,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e03688d23f653aec70c6451ac9c788b0
https://doi.org/10.1007/s10596-019-09928-2

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Bayesian full-waveform inversion of tube waves to estimate fracture aperture and compliance

Autor: Eva Caspari, Nicolás D. Barbosa, Shohei Minato, Jürg Hunziker, Andrew Greenwood, Klaus Holliger

Publikováno v: Solid Earth, Vol 11, Pp 657-668 (2020)
Solid Earth, 11(2)
Solid Earth, Vol. 11, No 2 (2020) pp. 657-668

The hydraulic and mechanical characterization of fractures is crucial for a wide range of pertinent applications, such as geothermal energy production, hydrocarbon exploration, CO2 sequestration, and nuclear waste disposal. Direct hydraulic and mecha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e293ebeb671f9a697a44876584075728
https://www.solid-earth.net/11/657/2020/se-11-657-2020.pdf

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Characterization and imaging of a hydrothermally active near-vertical fault zone in crystalline rocks based on hydrophone VSP data

Autor: Tobias Zahner, Jürg Hunziker, Andrew Greenwood, Daniel Egli, Klaus Holliger, Ludovic Baron, Eva Caspari

Publikováno v: Tectonophysics. 750:153-176

A shallow, hydrothermally active, fault zone embedded in fractured crystalline rocks of the Central Swiss Alps has been drilled and geophysically explored in view of its potential analogies to planned petrothermal reservoirs in the Alpine Foreland. V

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d76870867e6dafbb1a3067a7e4fc9141
https://doi.org/10.1016/j.tecto.2018.11.015

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Estimation of fracture compliance based on group delays inferred from full-waveform sonic log data

Autor: Andrew Greenwood, Zhenya Zhou, Eva Caspari, Klaus Holliger, Nicolás D. Barbosa

Fractures, which are ubiquitous in the Earth’s upper crust, have significant impacts on a wide range of human activities, and, hence, their adequate characterization is of wide interest and importance. Seismic methods have significant potential for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7299615162a68786de1d0f1358b8657c
https://doi.org/10.5194/egusphere-egu21-10820

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