Evolution of fracture permeability through fluid–rock reaction under hydrothermal conditions

Yasuhara, Hajime; Polak, A.; Mitani, Yasuhiro; Grader, A.S.; Halleck, P.M.; Elsworth, Derek

doi:10.1016/j.epsl.2006.01.046

Cited by 164 publications

(133 citation statements)

References 33 publications

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“…Among these methods are those based on the distribution of temperatures using thermocouples (Teufel and Logan 1978), on resistance to the passage of an electric current from one wall to the other (Power and Hencher 1996) and on the impression of the contact zones obtained with pressure-sensitive paper (Duncan and Hancock 1966) or deformable film (Iwai 1976;Bandis et al 1983). Methods of injecting the fracture using a metal alloy with a low melting point, such as Wood's metal (Pyrak-Nolte et al 1987;Yasuhara et al 2006), also restrict the information obtained to binary data: injectable or contact zone. Furthermore, it does not enable reuse of the fracture after injection.…”

Section: Mapping the Void Thicknesses (Or Heights)mentioning

confidence: 99%

“…It would therefore appear from this test that the dissolution phenomena (dissolution of the calcite, plagioclase) are rather of the free face dissolution type and that the pressure solution phenomena described by some authors (e.g. Polak et al 2003;Yasuhara et al 2006) were limited. With the occurrence of the latter being related to the Fig.…”

mentioning

confidence: 99%

“…This validation requires, among other things, an understanding of the chemical phenomena occurring within the fracture and the changes in the fracture's morphology. A number of recent studies (Polak et al 2003;Yasuhara et al 2006;McGuire et al 2013;Zhao et al 2014) are devoted to chemical interactions in fractures and, in particular, to the different types of mineral dissolution patterns. Two types of dissolution phenomena are identified: those of the free face dissolution type and those of the pressure solution type.…”

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confidence: 99%

See 2 more Smart Citations

Evolution of fracture permeability with respect to fluid/rock interactions under thermohydromechanical conditions: development of experimental reactive percolation tests

Blaisonneau¹,

Peter-Borie²,

Gentier³

2016

Geotherm Energy

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Section: Mapping the Void Thicknesses (Or Heights)mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Evolution of fracture permeability with respect to fluid/rock interactions under thermohydromechanical conditions: development of experimental reactive percolation tests

Blaisonneau¹,

Peter-Borie²,

Gentier³

2016

Geotherm Energy

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“…UFD researchers from LBNL are participating as DOE's modeling team in this task (see Section 6.1.1.2). (Polak et al, 2003;Yasuhara et al, 2004;Yasuhara et al, 2006). These experiments involved reactive flow-through compression and shear tests conducted on single natural-fracture specimens under different temperature, stress, and chemical conditions.…”

Section: International Collaboration Activities In Different Geologicmentioning

confidence: 99%

“…Task C1 aims at modeling, in a fully coupled manner, the THMC processes in rock fractures based on the two sets of experiments described by Yasuhara et al (2006) and Yasuhara et al (2011), which exhibit coupled THMC responses in single artificial fractures in novaculite (quartzite) and granite, respectively. The ultimate objective is to investigate, develop, and test robust process models for the representation of coupled THMC processes in fractured rock, by using the experimental data and the results of the modeling work above.…”

Section: International Collaboration Activities In Different Geologicmentioning

confidence: 99%

International Collaboration Activities in Different Geologic Disposal Environments

Birkholzer

2015

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This report describes the current status of international collaboration regarding geologic disposal research in the Used Fuel Disposition (UFD) Campaign. Since 2012, in an effort coordinated by Lawrence Berkeley National Laboratory, UFD has advanced active collaboration with several international geologic disposal programs in Europe and Asia. Such collaboration allows the UFD Campaign to benefit from a deep knowledge base with regards to alternative repository environments developed over decades, and to utilize international investments in research facilities (such as underground research laboratories), saving millions of R&D dollars that have been and are being provided by other countries. To date, UFD's International Disposal R&D Program has established formal collaboration agreements with five international initiatives and several international partners, and national lab scientists associated with UFD have conducted specific collaborative R&D activities that align well with its R&D priorities. Guiding principles for selection of collaboration options and activities are as follows:• Focus on activities that complement ongoing disposal R&D within UFD (e.g., the science and engineering tools developed in UFD are tested in comparison with international experiments).• Select collaborative R&D activities based on technical merit, relevance to safety case, and cost/benefit, and strive for balance in terms of host rock focus and repository design.• Emphasize collaboration that provides access to and/or allows participation in field experiments conducted in operating underground research laboratories not currently available in the U.S. (i.e., clay, crystalline).• Focus on collaboration opportunities for active R&D participation (i.e., U.S. researchers work closely together with international scientists on specific R&D projects relevant to both sides). Key Issues Tackled in Current and Planned PortfolioThe current work conducted within international activities centers on the following key research questions:• Near-Field Perturbation: How important is the near-field damage to a host rock (such as clay and salt) due to initial mechanical and thermal perturbation, and how effective is healing and sealing of the damage zone in the long term? How reliable are existing constitutive models for the deformation of elastoplastic and plastic geomaterials as affected by temperature and watercontent changes? • Engineered Barrier Integrity: What is the long-term stability and retention capability of backfills and seals? Can bentonite mixtures be developed that allow for gas-pressure release while maintaining sealing properties for water? Can bentonite be eroded when in contact with water from flowing fractures? How relevant are interactions between engineered and natural barrier materials, such as metal-bentonite-cement interactions? • Radionuclide Transport: Can the radionuclide transport in fractured rock be predicted with confidence? What is the potential for enhanced transport with colloids? How can the diffusive transport proce...

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Beyond‐laboratory‐scale prediction for channeling flows through subsurface rock fractures with heterogeneous aperture distributions revealed by laboratory evaluation

et al. 2015

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The present study evaluates aperture distributions and fluid flow characteristics for variously sized laboratory-scale granite fractures under confining stress. As a significant result of the laboratory investigation, the contact area in fracture plane was found to be virtually independent of scale. By combining this characteristic with the self-affine fractal nature of fracture surfaces, a novel method for predicting fracture aperture distributions beyond laboratory scale is developed. Validity of this method is revealed through reproduction of the results of laboratory investigation and the maximum aperture-fracture length relations, which are reported in the literature, for natural fractures. The present study finally predicts conceivable scale dependencies of fluid flows through joints (fractures without shear displacement) and faults (fractures with shear displacement). Both joint and fault aperture distributions are characterized by a scale-independent contact area, a scale-dependent geometric mean, and a scale-independent geometric standard deviation of aperture. The contact areas for joints and faults are approximately 60% and 40%. Changes in the geometric means of joint and fault apertures (μm), e m, joint and e m, fault , with fracture length (m), l, are approximated by e m, joint = 1 × 10 2 l 0.1 and e m, fault = 1 × 10 3 l 0.7 , whereas the geometric standard deviations of both joint and fault apertures are approximately 3. Fluid flows through both joints and faults are characterized by formations of preferential flow paths (i.e., channeling flows) with scale-independent flow areas of approximately 10%, whereas the joint and fault permeabilities (m 2 ), k joint and k fault , are scale dependent and are approximated as k joint = 1 × 10 À12 l 0.2 and k fault = 1 × 10 À8 l 1.1 .

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Evolution of fracture permeability through fluid–rock reaction under hydrothermal conditions

Cited by 164 publications

References 33 publications

Evolution of fracture permeability with respect to fluid/rock interactions under thermohydromechanical conditions: development of experimental reactive percolation tests

Evolution of fracture permeability with respect to fluid/rock interactions under thermohydromechanical conditions: development of experimental reactive percolation tests

International Collaboration Activities in Different Geologic Disposal Environments

Beyond‐laboratory‐scale prediction for channeling flows through subsurface rock fractures with heterogeneous aperture distributions revealed by laboratory evaluation

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