Interfacial energy effects and the evolution of pore size distributions during quartz precipitation in sandstone

Emmanuel, Simon; Ague, Jay J.; Walderhaug, Olav

doi:10.1016/j.gca.2010.03.019

Cited by 83 publications

(77 citation statements)

References 42 publications

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“…In general, equilibrium and nonequilibrium effects favour growth in large pores rather than in small pores. This has been observed for halite cemented sandstones (Putnis and Mauthe, 2001), for quartz cementation between stylolites in sandstone (Emmanuel et al, 2010), for gas hydrate (clathrate) growth in sediments (Rempel, 2011) or during precipitation of weathering products in porous andesite (Section 8.3 and Jamtveit et al, 2011).…”

Section: Pore Size Effectsmentioning

confidence: 82%

“…This rate expression applies to porous systems near equilibrium (Lasaga, 1998). Emmanuel et al (2010) concluded that during quartz precipitation in sandstone, significant pore size effects can be observed for pore widths up to 10 mm. This is surprising because the solubility effects for 10 mm sized pores is <<1% for surface energies on the order of 0.1-1 J/m 2 (Stumm and Morgan, 1996).…”

Section: Pore Size Effectsmentioning

confidence: 99%

“…The effects of pore size on mineral solubility were incorporated into a reactive transport model by Emmanuel and Berkowitz (2007) and applied to quartz precipitation in sandstone by Emmanuel et al (2010). Navarre-Sitchler et al (2009;2011) on the other hand characterised the pore space, reactive surface area and transport properties during basalt weathering by X-ray microtomography (mCT, also known as XMT), diffusion experiments and numerical modelling.…”

Section: The Reaction Path Approach To Reactive Transportmentioning

confidence: 99%

“…The pore size effects in reactive transport modelling have recently been investigated by Simon Emmanuel and collaborators (Emmanuel and Berkowitz, 2007;Emmanuel and Ague, 2009;Emmanuel et al, 2010) by adding provision for pore size on the mineral solubility expression. The solubility, S d , is given by:…”

Section: Pore Size Effectsmentioning

confidence: 99%

See 3 more Smart Citations

Sculpting of Rocks by Reactive Fluids

Jamtveit¹,

Hammer²

2012

Geochem Persp

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Section: Pore Size Effectsmentioning

confidence: 82%

Section: Pore Size Effectsmentioning

confidence: 99%

Section: The Reaction Path Approach To Reactive Transportmentioning

confidence: 99%

Section: Pore Size Effectsmentioning

confidence: 99%

See 2 more Smart Citations

Sculpting of Rocks by Reactive Fluids

Jamtveit¹,

Hammer²

2012

Geochem Persp

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“…However, when the porosity was between 0.36 and 0.38, the value ranges of dissolution rates under a supercritical state were greater. It is suggested that pore-size distribution will affect the dissolution rate, which is another mechanism identified for trapping as varying solubility is applicable [32].…”

Section: Porosity and Saturation Influencementioning

confidence: 99%

Characterizing the Dissolution Rate of CO2-Brine in Porous Media under Gaseous and Supercritical Conditions

Teng

et al. 2017

Applied Sciences

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Abstract:The CO 2 -brine dissolution homogenizes the distribution of residual CO 2 and reduces the leakage risk in the saline aquifer. As a key parameter to immobilize the free CO 2 , the dissolution rate of CO 2 -brine could be accelerated through mechanisms like diffusion and dispersion, which are affected by the subsurface condition, pore structure, and background hydrological flow. This study contributed the calculated dissolution rates of both gaseous and supercritical CO 2 during brine imbibition at a pore-scale. The flow development and distribution in porous media during dynamic dissolution were imaged in two-dimensional visualization using X-ray microtomography. The fingerings branching and expansion resulted in greater dissolution rates of supercritical CO 2 with high contact between phases, while the brine bypassed the clusters of gaseous CO 2 with a slower dissolution and longer duration due to the isolated bubbles. The dissolution rate of supercritical CO 2 was about two or three orders of magnitude greater than that of gaseous CO 2 , while the value distributions both spanned about four orders of magnitude. The dissolution rates of gaseous CO 2 increased with porosity, but the relationship was the opposite for supercritical CO 2 . CO 2 saturation and the Reynolds number were analyzed to characterize the different impacts on gaseous and supercritical CO 2 at different dissolution periods.

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Evaluation of Macroscopic Porosity‐Permeability Relationships in Heterogeneous Mineral Dissolution and Precipitation Scenarios

Beckingham

2017

Water Resources Research

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Mineral dissolution and precipitation reactions may alter porosity and permeability in porous media. While porosity generally increases with mineral dissolution and decreases with precipitation, corresponding permeability alterations are complex and predictive capabilities remain limited. The evolution of permeability depends on the spatial locations of geochemical reactions, both in individual pores and in the greater pore network and a range of reaction patterns have been observed in prior experimental investigations. Macroscopic relationships are needed in core‐to‐field scale reactive transport simulations that can accurately simulate permeability evolutions resulting from pore‐scale reactions. Currently, empirical porosity‐permeability relationships, such as the Kozeny‐Carman equation, are widely used to predict permeability evolution. However, these relationships only allow for a single permeability value for each porosity value and the validity of these relationships for the various spatial distributions of pore‐scale alterations is unknown. Using pore network model simulations, changes in permeability resulting from a range of dissolution and precipitation patterns (uniform, random, channelized, and size‐dependent) in a sandstone sample are investigated. The validity of macroscopic porosity‐permeability relationships for these reaction scenarios is evaluated by comparing computed permeability values with pore model simulations. Simulation results exhibit a large variation in porosity‐permeability relationships among reaction scenarios. Macroscopic porosity‐permeability relationships work well for uniform reaction scenarios where the extent of reaction is related to the pore size. The porosity and permeability relationships that result from more complex pore‐scale alterations, including pore size‐dependent reactions however, cannot be captured using these empirical relationships.

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Interfacial energy effects and the evolution of pore size distributions during quartz precipitation in sandstone

Cited by 83 publications

References 42 publications

Sculpting of Rocks by Reactive Fluids

Sculpting of Rocks by Reactive Fluids

Characterizing the Dissolution Rate of CO2-Brine in Porous Media under Gaseous and Supercritical Conditions

Evaluation of Macroscopic Porosity‐Permeability Relationships in Heterogeneous Mineral Dissolution and Precipitation Scenarios

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