Permeability alteration due to salt precipitation driven by drying in the context of CO2 injection

Peysson, Yannick; Bazin, Brigitte; Magnier, Caroline; Kohler, Eric; Youssef, S.

doi:10.1016/j.egypro.2011.02.391

Cited by 51 publications

(30 citation statements)

References 7 publications

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“…It is clear from Eqs. (2) and (5) that the interstitial velocity in the region of the porous medium adjacent to the porous medium surface is greater at the periphery. As a result, the greater evaporation flux at the periphery induces a greater local instantaneous Peclet number at the periphery and therefore the preferential onset of the efflorescence at the periphery.…”

Section: Efflorescence Centripetal Colonizationmentioning

confidence: 97%

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Experimental study of the effect of sodium chloride on drying of porous media: The crusty–patchy efflorescence transition

Eloukabi

Sghaier

Nasrallah

et al. 2013

International Journal of Heat and Mass Transfer

106

107

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a b s t r a c tWe present an experimental study of drying in the presence of dissolved sodium chloride. The process is characterized by the formation of a crystallized salt layer, referred to as efflorescence, at the evaporative surface of the porous medium. By varying the average size of the beads forming the porous medium, we show that the formation of the crystal layer does not affect significantly the drying process and can even enhance the drying rate when the beads are sufficiently large. By contrast, the crystal layer can greatly affect the drying process and even blocks or severely limit the evaporation process for sufficiently small beads. We therefore show the existence of two regimes, namely the blocking regime and the enhanced drying rate regime. It is shown that the two regimes correspond to two different types of efflorescence, referred to as crusty and patchy, respectively. Then by varying the initial salt concentration for a given bead size, we show that the interplay between drying and the efflorescence formation leads to a nonmonotonous variation of the drying rate with the initial salt concentration when the efflorescence is patchy but not when the efflorescence is crusty. The crusty-patchy transition is finally discussed from a simple model of capillary rise in the efflorescence.

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Section: Efflorescence Centripetal Colonizationmentioning

confidence: 97%

“…[1] and references therein, injection of CO 2 in aquifer [2] and civil engineering owing to the major damages that can be induced by the salt crystallization process, e.g. [3,4].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the effect of sodium chloride on drying of porous media: The crusty–patchy efflorescence transition

Eloukabi

Sghaier

Nasrallah

et al. 2013

International Journal of Heat and Mass Transfer

106

107

View full text Add to dashboard Cite

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“…In addition to these well identified problems, the question of the impact of a dissolved species on evaporation is of general interest in the context of drying 3 or the injection of CO 2 in aquifer. 4 In spite of the importance of the afore-mentioned applications and the advances made in recent years, [5][6][7][8][9] the modeling of drying in the presence of dissolved salt and crystallization is not very advanced and can be actually considered as a widely open problem. This is so notably because the interplay between the various transport phenomena occurring during drying and the development of crystallized salt structures forming as a result of the evaporation process are not yet well understood.…”

Section: Introductionmentioning

confidence: 99%

Porous medium coffee ring effect and other factors affecting the first crystallisation time of sodium chloride at the surface of a drying porous medium

et al. 2013

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We study the distribution of ions in a drying porous medium up to the formation of first crystals at the surface. The study is based on comparisons between numerical simulations and experiments with packings of glass beads. The experimental configuration, which is representative of many previous drying experiments, is characterized by the formation of an efflorescence fairy ring at the surface of the porous medium. The preferential formation of crystals at the periphery is explained by the combined effect of higher evaporation fluxes at the surface periphery, as in the classical coffee ring problem, and variations in the porosity near the wall bordering the packing. It is shown that both effects have a great impact on the time marking the occurrence of first crystals, which is referred to as the first crystallization time.The experiments indicate that the first crystallization time increases with a decreasing bead size for a given initial ion concentration. This is explained by the variation with bead size of the characteristic size of the near wall region where a preferential desaturation of the sample occurs as a result of the porosity increase near the wall. The study also reveals a significant salt supersaturation effect. This represents a noticeable fact in relation with salt weathering issues. C 2013 AIP Publishing LLC.

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“…Porosity reduction between 4% and 29% have been reported (Bacci et al, 2011). Brine salinity, gas injection rate, initial rock permeability, porosity, formation temperature and pressure are factors that influence this mechanism (Zuluaga and Monsalve, 2003, Bacci et al, 2011, Peysson et al, 2011, Golghanddashti et al, 2011. Brine salinity, gas injection rate, initial rock permeability, porosity, formation temperature and pressure are factors that influence this mechanism (Zuluaga and Monsalve, 2003, Bacci et al, 2011, Peysson et al, 2011, Golghanddashti et al, 2011.…”

Section: Introductionmentioning

confidence: 98%

“…Precipitated minerals reduce injectivity by plugging the pore constrictions (Peysson et al, 2011). After formation dry-out and mineral precipitation, viscous forces from injected CO 2 could displace the precipitates.…”

Section: Introductionmentioning

confidence: 99%

CO2 Well Injectivity: Effect of Viscous Forces on Precipitated Minerals

Sokama‐Neuyam

Ursin

2015

Day 4 Wed, December 09, 2015

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TX 75083-3836, U.S.A., fax ϩ1-972-952-9435Abstract Carbon Capture and Storage (CCS) is particularly attractive for the oil and gas industry due to the potential of Enhanced Oil Recovery (EOR). The presence of adequate well injectivity is identified as a prerequisite for CCS and CO 2 EOR projects. Mineral precipitation in the vicinity of the well is suggested as a possible injectivity impairment mechanism. After mineral precipitation and formation dryout, continuous injection of CO 2 into the formation could redistribute precipitates and alter injectivity. In this work, we investigated the effect of viscous force on precipitated minerals and the resulting consequences on permability and injectivity. The influence of supercritical CO 2 injection rate, initial core permeability and saturating brine salinity were investigated. We observed that, injectivity impairment has a maximum immediately after mineral precipitation. Continuous injection of supercritical CO 2 into the core after mineral precipitation is seen to reduce injectivity impairment induced by precipitated minerals. In most numerical and geochemical models, static injectivity impairment as a result of mineral precipitation is often assumed. Our findings suggest that injectivity remains dynamic throughout the injection process. Therefore, changes in CO 2 injectivity after mineral precipitation could be complex to model and understanding of the processes is a good point to start.

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Permeability alteration due to salt precipitation driven by drying in the context of CO2 injection

Cited by 51 publications

References 7 publications

Experimental study of the effect of sodium chloride on drying of porous media: The crusty–patchy efflorescence transition

Experimental study of the effect of sodium chloride on drying of porous media: The crusty–patchy efflorescence transition

Porous medium coffee ring effect and other factors affecting the first crystallisation time of sodium chloride at the surface of a drying porous medium

CO2 Well Injectivity: Effect of Viscous Forces on Precipitated Minerals

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