A reactive transport model for geochemical mitigation of CO2 leaking into a confined aquifer

Druhan, Jennifer L.; Vialle, Stéphanie; Maher, Kate; Benson, Sally M.

doi:10.1016/j.egypro.2014.11.495

Cited by 9 publications

(2 citation statements)

References 48 publications

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“…Rifai et al [12] developed a two-species bioremediation model, known as BIOPLUME-II, to predict the fate and transport of hydrocarbon contaminants that degrade via aerobic reactions. Jennifer et al [13] presented a reactive transport model for geochemical mitigation of CO2 leaking into a confined aquifer.…”

Section: Introductionmentioning

confidence: 99%

Transport of groundwater contaminants with multiple reactive species

Ratchagar¹,

Senthamilselvi²

2019

IJRAT

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The motive of this work is to give a mathematical model describing contaminant transport problem for three reacting species coupled by a sequential first order reaction. The governing equations are transformed into a nondimensional form using suitable set of dimensionless variables and solved by perturbation method. The effect of various physical parameters involved in the problem are presented graphically to illustrate interesting features of the solutions.

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Section: Introductionmentioning

confidence: 99%

Transport of groundwater contaminants with multiple reactive species

Ratchagar¹,

Senthamilselvi²

2019

IJRAT

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“…The gel is a polymerised form of amorphous silica which forms through the reaction of an alkaline sodium silicate solution and an acid 15 or from an alkaline sodium silicate solution alone with an adjusted pH so that gel formation occurs within hours to days 16,17 . The precipitation of the gel clogs the pore space, thereby reducing porosity and permeability of the reservoir which blocks CO 2 flow pathways [18][19][20] . The concept of a silica gel barrier in the context of carbon sequestration arose in response to the need for mitigation and remediation technologies to ensure the long-term security of CO 2 12,21 .…”

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confidence: 99%

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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