Development of reactive-transport models simulating the formation of a silica gel barrier under CO2 storage conditions

Llanos, Ella María; Castañeda-Herrera, César A.; Black, J. Roy; Haese, Ralf R.

doi:10.1016/j.ijggc.2022.103739

Cited by 7 publications

(10 citation statements)

References 45 publications

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“…Carbonate minerals such as calcite are the most susceptible to CO 2 in the reaction kinetics of the water‐rock reaction. The reaction kinetics is the main source of dissolution pores (Fazeli et al, 2019; Llanos et al, 2022; Takaya et al, 2015). This study only considers the dissolution or precipitation of calcite (R6) and its modification on fracture permeability.…”

Section: Formulations For the Co2 Reactive Transport In Caprockmentioning

confidence: 99%

“…Nevertheless, the precipitation reaction was observed in anhydrite caprock (Bolourinejad & Herber, 2015; Miri & Hellevang, 2016; Yang et al, 2020; Wolterbeek & Hangx, 2021). This dissolution or precipitation reaction may vary if the CO 2 breaks through the caprock (Llanos et al, 2022; Luquot et al, 2016; Wang & Peng, 2014). The flow‐through leakage can significantly modify the fracture aperture and thus achieve an effect of self‐enhancement (Ellis et al, 2013; Fei et al, 2015; Sciandra et al, 2022; Smith et al, 2013; Wang et al, 2016; Zou et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO₂ geosequestration

Wang

et al. 2023

Deep Underground Science and Engineering

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Precipitation or dissolution due to geochemical reactions has been observed in the caprocks for CO 2 geosequestration. Geochemical reactions modify the caprock sealing efficiency with self-limiting or self-enhancement. However, the effect of this modification on the caprock sealing efficiency has not been fully investigated through multiphysical-geochemical coupling analysis. In this study, a multiphysical-geochemical coupling model was proposed to analyze caprock sealing efficiency. This coupling model considered the full couplings of caprock deformation, two-phase flow, CO 2 concentration diffusion, geochemical reaction, and CO 2 sorption. The two-phase flow only occurs in the fracture network and the CO 2 may partially dissolve into water and diffuse through the concentration difference. The dissolved CO 2 has geochemical reactions with some critical

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Section: Formulations For the Co2 Reactive Transport In Caprockmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO₂ geosequestration

Wang

et al. 2023

Deep Underground Science and Engineering

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“…Core flood experiments at both ambient and reservoir conditions as well as numerical modelling highlighted Si-gel as an ideal material for applications in CCS [22][23][24] . More recently, the concept of emplacing a Si-gel flow barrier above an injection point was proposed as a technology to increase the lateral migration of CO 2 , thereby enhancing the storage capacity 25 (Fig. 1) .…”

mentioning

confidence: 99%

“…1) . The in-situ formation of the gel can be achieved by co-injecting an acid and a Na-Si reagent 25,26 . The reactions between the two result in the precipitation of the polymerised form of amorphous silica which fills the pore space.…”

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confidence: 99%

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The feasibility of enhanced pore space utilization in CO2 storage reservoirs using an artificially emplaced Si-gel flow barrier

Cossins,

Mishra,

Haese

2023

Sci Rep

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Carbon capture and storage is a key technology to abate CO2 emissions. One of the challenges towards ensuring the efficiency and the security of CO2 storage in reservoirs, such as open saline aquifers, is the low pore space utilization. This study investigates the feasibility of using an artificial Si-gel barrier to enhance pore space utilisation in such reservoirs under variable geological conditions. Conceptually, enhanced CO2 capillary trapping is achieved by emplacing a disk-shaped, low-permeability barrier above the CO2 injection point forcing the injected CO2 to migrate laterally underneath the barrier before transitioning to buoyancy-controlled migration. Multiphase fluid flow simulations were conducted to test the feasibility of this concept. Sensitivity analysis revealed that the barrier exhibits a strong control on CO2 plume geometry. Specifically, the relative impact of the barrier diameter on increasing the CO2 plume width, reducing the plume height and enhancing trapping varied between 67 and 86%. Capillary trapping was enhanced by 40–60% with a 20 m increase in barrier diameter in low permeability reservoirs. Additionally, the results indicate that the barrier can enhance the security of trapping CO2 in high permeability reservoirs. Results were tested for the South-West Hub reservoir, a case study area in Western Australia.

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Sealing fractures to increase underground storage security: Lessons learned from a multiscale multimodal imaging study of a syntaxial vein in a mudrock

et al. 2022

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Development of reactive-transport models simulating the formation of a silica gel barrier under CO2 storage conditions

Cited by 7 publications

References 45 publications

A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO₂ geosequestration

A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO₂ geosequestration

The feasibility of enhanced pore space utilization in CO2 storage reservoirs using an artificially emplaced Si-gel flow barrier

Sealing fractures to increase underground storage security: Lessons learned from a multiscale multimodal imaging study of a syntaxial vein in a mudrock

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Development of reactive-transport models simulating the formation of a silica gel barrier under CO2 storage conditions

Cited by 7 publications

References 45 publications

A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO2 geosequestration

A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO2 geosequestration

The feasibility of enhanced pore space utilization in CO2 storage reservoirs using an artificially emplaced Si-gel flow barrier

Sealing fractures to increase underground storage security: Lessons learned from a multiscale multimodal imaging study of a syntaxial vein in a mudrock

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A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO₂ geosequestration

A multiphysical‐geochemical coupling model for caprock sealing efficiency in CO₂ geosequestration