Seismic properties in conductive and convective hot and super-hot geothermal systems

Farina, Biancamaria; Poletto, Flávio; Mendrinos, Dimitrios; Carcione, José M.; Karytsas, Constantine

doi:10.1016/j.geothermics.2019.05.005

Cited by 11 publications

(19 citation statements)

References 48 publications

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“…Detecting the presence of immiscible fluid phases and monitoring their displacements throughout the subsurface by means of noninvasive geophysical techniques is widely considered to be a key frontier in the overall field of applied and environmental geophysics. New advances in this direction are of interest, for example, to CO 2 geosequestration (e.g., Arts et al., 2004), geothermal energy exploitation (e.g., Farina et al., 2019), nuclear waste storage (e.g., Smith & Snieder, 2010), and hydrocarbon exploration and production (e.g., Lumley, 2001). Seismic methods are particularly valuable for addressing these problems, as seismic waves are highly sensitive to changes in the hydraulic and mechanical properties of rocks.…”

Section: Introductionmentioning

confidence: 99%

Seismic Signatures of Fractured Porous Rocks: The Partially Saturated Case

et al. 2020

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Seismic attenuation and phase velocity dispersion due to mesoscopic fluid pressure diffusion (FPD) have received increasing attention due to their inherent sensitivity to the hydromechanical properties of monosaturated fractured porous media. While FPD processes are directly affected by key macroscopic properties of fractured rocks, such as fracture density and fracture connectivity, there is, as of yet, a lack of comprehension of the associated characteristics when multiple immiscible phases saturate the probed fractured medium. In this work, we analyze the variations experienced by P and S wave attenuation and phase velocity dispersion when CO2 percolates into an initially brine‐saturated fractured porous rock. We study such variations considering a simple model of a porous rock containing intersecting orthogonal fractures as well as a more complex model comprising a fracture network. In the latter, we simulate the flow of a CO2 plume into the medium using an invasion percolation procedure. Representative samples are subjected to numerical upscaling experiments, consisting of compression and shear tests, prior to and after the CO2 invasion process. Results show that fracture‐to‐background FPD is only sensitive to the presence of CO2, which decreases its effects. However, fracture‐to‐fracture FPD depends on both the overall CO2 saturation and the fluid distribution within the fracture network. While the former modulates the magnitude of the dissipation, the latter can give rise to a novel FPD process occurring between CO2‐saturated and brine‐saturated regions of the fracture network.

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Section: Introductionmentioning

confidence: 99%

Seismic Signatures of Fractured Porous Rocks: The Partially Saturated Case

et al. 2020

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“…2 ) and update levels. The various geomodel versions were made available regularly to project partners and were used as a quantitative geometrical basis for additional works, such as compiling rock properties 11 , calculating seismic properties 12 , computing earthquake tomography 13 , evaluating thermal behaviour and geothermal potential 14 , modelling fluid reinjection 15 , and interpreting the volcanic and geothermal systems 16 – 18 .…”

Section: Background and Summarymentioning

confidence: 99%

A collection of 3D geomodels of the Los Humeros and Acoculco geothermal systems (Mexico)

et al. 2022

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This paper aims at sharing 3D geological models that were constructed at different scales in two Mexican geothermal areas as part of the European-Mexican GEMex project. The project was devoted to investigate superhot resources in Los Humeros and enhanced geothermal systems in Acoculco, both areas located in eastern Mexico. To build confidence in the resultant datasets and to potentially inform the development of models in similar contexts, the methodology is also described. The models integrate the main geological and geothermal features of the study areas and served as a framework for subsequent calculations and simulations. Preliminary models were based on data available at the beginning of the project, and were updated several times as new geological, geochemical, and geophysical field-data were obtained. The construction of the geomodels was performed in a collaborative and interdisciplinary way, using an existing software, and ultimately enabled a consensus interpretation and representation to be reached by the several disciplinary experts involved.

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“…On the other hand, the viscous deformation of crustal rocks occurs through different anelastic mechanisms including diffusion creep, numerous mechanisms of the dislocation creep, pressure solution that exhibits dependency on their structure, composition, and fluid content, as well as on their P-T conditions (e.g., Burov, 2011). Therefore, it is likely that seismic attenuation and the viscous modes of deformations of rocks can be correlated, based on their dependency on the aforementioned conditions, as expressed by an Arrheniustype equation (Farina et al, 2019).…”

Section: Pyrochlore Supergroup Minerals Have General Chemical Formulamentioning

confidence: 99%

BEGEOSCIENTIST a young network - I Congresso Nazionale dei Giovani Geoscienziati

2021

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Seismic properties in conductive and convective hot and super-hot geothermal systems

Cited by 11 publications

References 48 publications

Seismic Signatures of Fractured Porous Rocks: The Partially Saturated Case

Seismic Signatures of Fractured Porous Rocks: The Partially Saturated Case

A collection of 3D geomodels of the Los Humeros and Acoculco geothermal systems (Mexico)

BEGEOSCIENTIST a young network - I Congresso Nazionale dei Giovani Geoscienziati

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