Serge Shapiro

Dynamic poroelasticity of thinly layered structures

Publisher: Elsevier BV

Date: 12-1998

DOI: 10.1016/S0020-7683(98)00092-4

Microscale modeling of temperature‐dependent reflection from poroelastic interface — Application to heavy‐oil reservoirs

Publisher: Society of Exploration Geophysicists

Date: 2007

DOI: 10.1190/1.2792890

Temperature-dependent poroelastic and viscoelastic effects on microscale-modelling of seismic reflections in heavy oil reservoirs

Publisher: Oxford University Press (OUP)

Date: 03-2009

DOI: 10.1111/J.1365-246X.2008.04016.X

Estimating Rupture Directions from Local Earthquake Data Using the IPOC Observatory in Northern Chile

Publisher: Seismological Society of America (SSA)

Date: 14-02-2018

DOI: 10.1785/0220170202

Fracture mechanics approach to the problem of subsidence induced by resource extraction

Publisher: Elsevier BV

Date: 09-2020

DOI: 10.1016/J.ENGFRACMECH.2020.107173

Attenuation of Seismic Waves Due to Wave‐Induced Flow and Scattering in Randomly Heterogeneous Poroelastic Continua

Publisher: Elsevier

Date: 2008

DOI: 10.1016/S0065-2687(08)00005-8

Finite-difference modeling of wave propagation on microscale: A snapshot of the work in progress

Publisher: Society of Exploration Geophysicists

Date: 09-2007

DOI: 10.1190/1.2753552

Abstract: Digital rock methodology combines modern microscopic imaging with advanced numerical simulations of the physical properties of rocks. Modeling of elastic-wave propagation directly from rock microstructure is integral to this technology. We survey recent development of the rotated staggered grid (RSG) finite-difference (FD) method for pore-scale simulation of elastic wave propagation in digital rock s les, including the dynamic elastic properties of rocks saturated with a viscous fluid. Examination of the accuracy of this algorithm on models with known analytical solutions provide an additional accuracy condition for numerical modeling on the microscale. We use both the elastic and viscoelastic versions of the RSG algorithm to study gas hydrates and to simulate propagation of Biot’s slow wave. We applyRSG method ology to examine the effect of gas hydrate distributions in the pore space of a rock. We compare resulting P-wave velocities with experimentally measured data, as a basis for building an effective-medium model for rocks containing gas hydrates. We then perform numerical simulations of Biot’s slow wave in a realistic 3D digital rock model, fully saturated with a nonviscous fluid (corresponding to the high-frequency limit of poroelasticity), and placed inside a bulk fluid. The model clearly demonstrates Biot’s slow curve when the interface is open between the slab and bulk fluid. We demonstrate slow wave propagation in a porous medium saturated with a viscous fluid by analyzing an idealized 2D porous medium represented alternating solid and viscous fluid layers. Comparison of simulation results with the exact solution for this layered system shows good agreement over a broad frequency range.

Seismic imaging of the geodynamic activity at the western Eger rift in central Europe

Publisher: Elsevier BV

Date: 04-2015

DOI: 10.1016/J.TECTO.2015.02.010

Slow compressional wave in porous media: Finite difference simulations on micro‐scale

Publisher: Society of Exploration Geophysicists

Date: 2006

DOI: 10.1190/1.2369914

A Small CO₂ Leakage May Induce Seismicity on a Sub‐Seismic Fault in a Good‐Porosity Clastic Saline Aquifer

Publisher: American Geophysical Union (AGU)

Date: 16-06-2022

DOI: 10.1029/2022GL098062

Abstract: Despite public concerns, only a few CO 2 injections into saline aquifers have reported microseismicity. We analyze passive seismic monitoring of a small (15,000 tonnes and 0.15 MPa pressure) injection of supercritical CO 2 ‐rich mixture for Stage 2C of the CO2CRC Otway Project (Victoria, Australia), which induced 19 detectable events with maximum moment magnitude M W ‐0.5. The locations and dynamic parameters of the triggered events indicate a reactivation of a small fault patch where CO 2 flowed through the fault. Time‐lapse seismic images of the plume and reservoir simulations show that the reactivation occurred when the CO 2 plume reached this fault. This might be indicative of a fault weakening by the plume that enabled subsequent reactivation by pressure variations. Our observations suggest that a leakage from a commercial‐scale storage may trigger felt seismicity in the overburden without strong overpressure, thus, the de‐risking workflows should involve a detailed study of small faults.

Multiwell Fiber Optic Sensing Reveals Effects of CO2 Flow on Triggered Seismicity

Publisher: Seismological Society of America (SSA)

Date: 05-07-2023

DOI: 10.1785/0220230025

Abstract: Induced seismicity is one of the main risks for gigaton-scale geological storage of carbon dioxide (CO2). Thus, passive seismic monitoring is often recommended as a necessary component of the monitoring systems for CO2 storage projects, with a particular forcus on risk mitigation. We present the first field study, CO2CRC Otway Project Stage 3 (Victoria, Australia), where distributed acoustic sensing (DAS) enabled high-precision tracking of the induced seismicity triggered by a small CO2 injection and also informed the reservoir models. In 610 days of passive seismic monitoring of the Stage 3 injection, we detected 17 microseismic events (maximum moment magnitude Mw 0.1) using five deep boreholes equipped with enhanced-sensitivity optical fiber. The DAS array has sensitivity sufficient for detection and location of induced events with Mw∼−2 in a monitoring borehole located up to 1500 m away. Thanks to the dense spatial s ling by the DAS, we were able to estimate the focal mechanisms for events with Mw& −1.5 although the monitoring boreholes provided very limited angular coverage. The main cluster of the events has the same location and source mechanism as the one triggered by the previous CO2 injection at the Otway Project site, Stage 2C. Surprizingly, the Stage 2C and Stage 3 events closely followed the actual movement of the CO2 saturation plume front (not the pressure front), as observed using controlled-source reflection seismic images. The nature of the plume-fault interaction remains unclear, but some alteration of the fault gouge by CO2 might be responsible for the faults’ reactivation by the pressure perturbation. Importantly, the seismogenic fault could not be identified in the seismic images and was only revealed by DAS observations, which also demonstrated the signature of fluid–rock interaction, that may control the CO2 flow.

The Born approximation in the problem of elastic wave scattering by a spherical inhomogeneity in a fluid-saturated porous medium

Publisher: AIP Publishing

Date: 14-09-1992

DOI: 10.1063/1.108468

Abstract: The Born approximation is applied to the problem of scattering of elastic waves by a small (compared to the wavelength of the fast compressional wave) spherical porous inclusion placed in another porous medium described by the low-frequency version of Biot’s theory. The results depend significantly on the ratio of the wavelength of slow compressional wave to the inhomogeneity size. For small values of this ratio results are in accordance with exact results of Berryman [J. Math. Phys. 26, 1408 (1985)]. In the opposite case new results are obtained and used to calculate compressional wave attenuation in a porous medium containing randomly distributed inclusions. The frequency dependence of attenuation is found to be in agreement with the results for randomly layered porous materials.

Karlsruhe Institut Fur Technologie Geophysikalisches Institut: Karlsruhe, Baden-Württemberg, DE

Location: Germany

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Moskovskij Gosudarstvennyj Universitet Imeni M V Lomonosova

Location: Russian Federation

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Freie Universität Berlin

Location: Germany

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Karlsruhe Institut Fur Technologie Geophysikalisches Institut

Location: Germany

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Nauchno-issledovatel'skij Institut Geosystem

Location: Russian Federation

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Université De Lorraine

Location: France

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Discovery Projects - Grant ID: DP0342998

Start Date: 2003

End Date: 06-2006

Amount: $255,000.00

Funder: Australian Research Council

Linkage Projects - Grant ID: LP0777012

Start Date: 06-2008

End Date: 12-2012

Amount: $147,000.00

Funder: Australian Research Council

Discovery Projects - Grant ID: DP190103260

Start Date: 06-2019

End Date: 06-2024

Amount: $410,000.00

Funder: Australian Research Council