Effect of brine composition on the onset of convection during CO2 dissolution in brine

Mahmoodpour, Saeed; Rostami, Behzad; Soltanian, Mohamad Reza; Amooie, Mohammad Amin

doi:10.1016/j.cageo.2018.12.002

Cited by 28 publications

(14 citation statements)

References 58 publications

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“…10 The convection-driven dissolution has been extensively studied experimentally for accelerated CO 2 dissolution in saline water under gravity for CO 2 storage inside two-dimension (2-dim) Hele-Shaw cells or 3-dimension (3-dim) cylindrical cells. [11][12][13][14][15][16][17][18][19][20][21][22] To make the CO 2 convective flow inside fluids (water or oil) analogous to 2-dim, Hele-Shaw cells are used. 23 Hele-Shaw cells are constructed by two parallel flat plates with a small gap in between (generally less than 10 mm).…”

Section: Introductionmentioning

confidence: 99%

“…The thickness of the cell should be enough to allow a clear visualization. Vosper et al 11 and Mahmoodpour et al 12 have conducted CO 2 convective dissolution into water-saturated porous media using a 2-dim Hele-Shaw cell under gas conditions. Amarasinghe et al 21 have conducted their experiments inside a Hele-Shaw cell at supercritical conditions (100 bar, 50°C) where CO 2 was dissolved into water-saturated homogeneous porous media.…”

Section: Introductionmentioning

confidence: 99%

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Visual investigation of CO₂ dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

2021

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CO 2 convective mixing in saline aquifers has been widely studied numerically and experimentally. Reservoir heterogeneity is significant for CO 2 convective mixing and experimental studies are still limited. In this study, we have conducted a visualization of CO 2 convective mixing experiments in heterogeneous porous media at reservoir conditions using CO 2 and water. We have used a two-dimension Hele-Shaw cell, different glass beads of different permeability at porous media, and water solution with pH indicator. Glass beads were packed in a different way (horizontally and vertically) to generate the heterogeneity inside the test cell. We have studied transport velocity deviation due to the heterogeneity and effects of permeability transition zone together with the effects of boundary conditions. It was found out that having a low permeable layer below a high permeable layer restructure the flow of CO 2 fingers and dampens the CO 2 transport velocity. With the vertical permeability zones, having a high permeability zone accelerates CO 2 gravity transport through that zone which is a good representation for a fracture or a fault in the reservoir. CO 2 convection onset is governed by the vertical high-permeable layer. Boundary conditions have been dominant with the presence of high permeable zones. It also found out that the experimental results presented in this study match with the simulation studies that are available in the literature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Visual investigation of CO₂ dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

2021

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“…1,2 There are extensive body of published works about the experimental and numerical aspects of this process. [3][4][5][6][7][8][9] However, high costs of CO 2 sequestration projects are a barrier in this topic. Based on this fact that large amount of costs is invested to purify CO 2 from the flue gas stream of the emission sources, some researchers introduced impure CO 2 sequestration as a way to tackle the economic issues.…”

Section: Introductionmentioning

confidence: 99%

Diffusion coefficients of CO₂–SO₂–water and CO₂–N₂–water systems and their impact on the CO₂ sequestration process: Molecular dynamics and dissolution process simulations

et al. 2021

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The high cost of the CO 2 sequestration in saline aquifers is a barrier to the implementation of them. However, a large portion of the cost is invested to purify and transport the CO 2 from the flue gas stream of the emission sources. Therefore, the possibility of injecting impure CO 2 will reduce the costs strongly. The diffusion coefficient is an important factor that plays a significant role in different aspects of the process. In spite of its importance, it is got less attention due to complex experimental procedures and low range of temperature and pressure applicability in the experimental conditions. To shed light on the effects of the impurity on the diffusion coefficient of CO 2 -water systems, two types of impurities (SO 2 and N 2 ) in two levels are considered in this study through the molecular dynamics simulation approach. Simulations are done on a wide range of pressure and temperature conditions to cover a wide range of operational conditions for CO 2 sequestration projects. The outcomes of these simulations were used in the direct numerical simulations to analyze the effect of the diffusion coefficient matrix changes on the CO 2 dissolution process such as dissolution flux, the motion and shape of convective fingers, and their patterns. Results indicate that impurity has a great impact on the

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“…This helps to understand how CO2 will be transported during long-term storage after injection for storage and EOR. The convectively driven dissolution has been extensively studied for accelerated CO2 dissolution in saline water for CO2 storage in 2-dimensional (2-dim) Hele-Shaw experimental setups [12][13][14][15][16][17][18] and using 3-dimensional (3-dim) confined experimental setups [19][20][21][22][23][24]. An extensive review on available CO2 convective mixing experiments in water is available in Amarasinghe et al [12].…”

Section: Introductionmentioning

confidence: 99%

CO2 Convective Dissolution in Oil-Saturated Unconsolidated Porous Media at Reservoir Conditions

et al. 2021

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During CO2 storage, CO2 plume mixes with the water and oil present at the reservoir, initiated by diffusion followed by a density gradient that leads to a convective flow. Studies are available where CO2 convective mixing have been studied in water phase but limited in oil phase. This study was conducted to reach this gap, and experiments were conducted in a vertically packed 3-dimensional column with oil-saturated unconsolidated porous media at 100 bar and 50 °C (representative of reservoir pressure and temperature conditions). N-Decane and crude oil were used as oils, and glass beads as porous media. A bromothymol blue water solution-filled sapphire cell connected at the bottom of the column was used to monitor the CO2 breakthrough. With the increase of the Rayleigh number, the CO2 transport rate in n-decane was found to increase as a function of a second order polynomial. Ra number vs. dimensionless time τ had a power relationship in the form of Ra = c×τ−n. The overall pressure decay was faster in n-decane compared to crude oil for similar permeability (4 D), and the crude oil had a breakthrough time three times slower than in n-decane. The results were compared with similar experiments that have been carried out using water.

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Effect of brine composition on the onset of convection during CO2 dissolution in brine

Cited by 28 publications

References 58 publications

Visual investigation of CO₂ dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

Visual investigation of CO₂ dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

Diffusion coefficients of CO₂–SO₂–water and CO₂–N₂–water systems and their impact on the CO₂ sequestration process: Molecular dynamics and dissolution process simulations

CO2 Convective Dissolution in Oil-Saturated Unconsolidated Porous Media at Reservoir Conditions

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Effect of brine composition on the onset of convection during CO2 dissolution in brine

Cited by 28 publications

References 58 publications

Visual investigation of CO2 dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

Visual investigation of CO2 dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

Diffusion coefficients of CO2–SO2–water and CO2–N2–water systems and their impact on the CO2 sequestration process: Molecular dynamics and dissolution process simulations

CO2 Convective Dissolution in Oil-Saturated Unconsolidated Porous Media at Reservoir Conditions

Contact Info

Product

Resources

About

Visual investigation of CO₂ dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

Visual investigation of CO₂ dissolution and convection in heterogeneous porous media at reservoir temperature and pressure conditions

Diffusion coefficients of CO₂–SO₂–water and CO₂–N₂–water systems and their impact on the CO₂ sequestration process: Molecular dynamics and dissolution process simulations