Calibration of water–granite interaction with pressure solution in a flow-through fracture under confining pressure

Lu, Renchao; Watanabe, Norihiro; He, Wenkui; Jang, Eunseon; Shao, Hua; Kolditz, Olaf; Shao, Haibing

doi:10.1007/s12665-017-6727-1

Cited by 10 publications

(6 citation statements)

References 37 publications

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“…Based on the formulation, a 1‐D reactive transport model is developed and applied to investigate the dissolution‐induced permeability evolution of a granite fracture under crustal conditions. This investigation meanwhile complements previous work by the authors (Lu et al, ), which neglected the hydraulic feedback on surface dissolution and focused on water‐granite interaction within a compacted fracture.…”

Section: Introductionsupporting

confidence: 74%

“…The mineral‐specific intragranular roughness factors f r are calculated by equation , with the measured grain diameter d = 178 μm and the BET surface area S BET = 0.51 m 2 /g (see Table ; measured data from Yasuhara et al, ). The fracture surface roughness factor

f_{normalr}^{^{'}}

is estimated from a numerically generated fracture surface profile and set to unity herein (Lu et al, ; Sidick, ).…”

Section: Model Setupmentioning

confidence: 99%

“…Amorphous silica and gibbsite serve as secondary precipitates in the current geochemical system, though the latter was not detected in the postexamination. Including gibbsite in addition is hinted by the diagnosis of secondary mineral paragenesis via the activity‐activity diagram (Lu et al, ; Zhu & Lu, ). Dissolution kinetics of the mineral surface reactions are listed in Table .…”

Section: Model Setupmentioning

confidence: 99%

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Modeling of Dissolution‐Induced Permeability Evolution of a Granite Fracture Under Crustal Conditions

Nagel

Shao

et al. 2018

JGR Solid Earth

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This work focuses on the interaction between pressure solution creep and contact area expansion under hydrothermal conditions and proposes an innovative process‐based approach for describing contact area expansion by fracture closure. The formulation is established in the physical context of pressure solution creep and represents the dynamic process of enhanced mineral dissolution over grain contacts, which moves toward equilibrium as a result of decrease of mineral solubility by pressure drop. Then, a theoretical maximum of the contact area ratio Rc,max is obtained from the formulation whose existence demonstrates that pressure solution is with an energy threshold for activation rather than spontaneously taking place under any circumstances. Based upon the formulation, a 1‐D reactive transport model is developed and applied to investigate dissolution‐induced permeability evolution of a granite fracture under crustal conditions. The applicability of the developed model to a polymineralic system is examined against the experimental measurements reported in Yasuhara et al. (2011, https://doi.org/10.1016/j.apgeochem.2011.07.005). This investigation reconfirms the significance of pressure solution creep in fracture permeability evolution under low and moderate temperatures and provides a justified interpretation for the unusual experimental observation that fracture permeability reduction does not necessarily lead to apparent increases of effluent element concentrations. The surface topography of fracture channels markedly affects hydraulic feedback on chemical compaction in terms of both magnitude and rate of change. Temperature elevation contributes to accelerating the progression of pressure solution creep.

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Section: Introductionsupporting

confidence: 74%

f_{normalr}^{^{'}}

is estimated from a numerically generated fracture surface profile and set to unity herein (Lu et al, ; Sidick, ).…”

Section: Model Setupmentioning

confidence: 99%

Section: Model Setupmentioning

confidence: 99%

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Modeling of Dissolution‐Induced Permeability Evolution of a Granite Fracture Under Crustal Conditions

Nagel

Shao

et al. 2018

JGR Solid Earth

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“…Several studies have shown that the dissolution of granite by water produces Mg and Ca cations through a complex relationship of rock-water interactions that are controlled by pH, temperature, pressure, and ionic concentrations in the aqueous solution [55][56][57][58][59][60]. A granite dissolution study by Chae et al [61] showed that ionic Ca concentrations in leachate water in contact with granitic particles gradually increased over time.…”

Section: Ca and Mg Exportmentioning

confidence: 99%

Remediation of Stormwater Pollutants by Porous Asphalt Pavement

Jayakaran

Knappenberger

Stark

et al. 2019

Water

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Porous Asphalt (PA) pavements are an increasingly adopted tool in the green stormwater infrastructure toolbox to manage stormwater in urbanized watersheds across the United States. This technology has seen particular interest in western Washington State, where permeable pavements are recognized as an approved best management practice per the National Pollutant Discharge Elimination System (NPDES) municipal stormwater permit. Stormwater effluent concentrations from six PA cells were compared with runoff concentrations from three standard impervious asphalt cells to quantify pollutant removal efficiencies by porous asphalt systems. Additionally, the effects of maintenance and pavement age on pollutant removal efficiencies were examined. Twelve natural and artificial storms were examined over a five-year period. Street dirt and pollutant spikes were added to the pavements prior to some storm events to simulate high loading conditions. Results from this work show that porous asphalt pavements are highly efficient at removing particulate pollutants, specifically coarse sediments (98.7%), total Pb ( 98.4%), total Zn (97.8%), and total suspended solids (93.4%). Dissolved metals and Polycyclic Aromatic Hydrocarbons (PAH) were not significantly removed. Removal efficiencies for total Pb, total Zn, motor oil, and diesel H. improved with the age of the system. Annual maintenance of the pavements with a regenerative air street sweeper did not yield significant pollutant removal efficiency differences between maintained and unmaintained PA cells.

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“…A high fracture closure rate occurs under high effective stress, indicating the contribution of pressure solution [20,43]. The permeability reduction with time can be described by a powerlaw relation under constant differential stress conditions [21,22], which may result from decreasing normal stress acting on an increasing area of the contact asperities [17,19,[44][45][46]. In the presence of stress, subcritical crack growth by stress corrosion may also contribute to the mechano-chemical processes that affect permeability evolution [28], but the effect on fluid chemistry is small [17].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Evolution of Fracture Permeability in Slate: An Experimental Study with Implications for Enhanced Geothermal Systems (EGS)

et al. 2021

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The long-term sustainability of fractures within rocks determines whether it is reasonable to utilize such formations as potential EGS reservoirs. Representative for reservoirs in Variscan metamorphic rocks, three long-term (one month each) fracture permeability experiments on saw-cut slate core samples from the Hahnenklee well (Harz Mountains, Germany) were performed. The purpose was to investigate fracture permeability evolution at temperatures up to 90 °C using both deionized water (DI) and a 0.5 M NaCl solution as the pore fluid. Flow with DI resulted in a fracture permeability decline that is more pronounced at 90 °C, but permeability slightly increased with the NaCl fluid. Microstructural observations and analyses of the effluent composition suggest that fracture permeability evolution is governed by an interplay of free-face dissolution and pressure solution. It is concluded that newly introduced fractures may be subject to a certain permeability reduction due to pressure solution that is unlikely to be mitigated. However, long-term fracture permeability may be sustainable or even increase by free-face dissolution when the injection fluid possesses a certain (NaCl) salinity.

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Calibration of water–granite interaction with pressure solution in a flow-through fracture under confining pressure

Cited by 10 publications

References 37 publications

Modeling of Dissolution‐Induced Permeability Evolution of a Granite Fracture Under Crustal Conditions

Modeling of Dissolution‐Induced Permeability Evolution of a Granite Fracture Under Crustal Conditions

Remediation of Stormwater Pollutants by Porous Asphalt Pavement

Long-Term Evolution of Fracture Permeability in Slate: An Experimental Study with Implications for Enhanced Geothermal Systems (EGS)

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