Thermodynamic and kinetic affinity of CO2 relative to CH4 and their pressure, temperature and pore structure sensitivity in the competitive adsorption system in shale gas reservoirs

Xie, Weidong; Wang, Hua; Vandeginste, Veerle; Chen, Si; Gan, Huajun; Wang, Meng; Yu, Zhenghong

doi:10.1016/j.energy.2023.127591

Cited by 9 publications

(3 citation statements)

References 73 publications

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“…Certainly, Xie et al (2021) made an investigation on the adsorption characteristics of CH 4 and CO 2 in shale at high pressure (0–25 MPa) and temperature (30–100 °C) . Xie et al (2023) studied the pressure (3–8 MPa), temperature (20–80 °C) and pore structure sensitivity in the CO 2 /methane competitive adsorption system in shale gas reservoirs . Currently, the conditions set for CO 2 exposure or CO 2 driving primarily reflect conventional temperature and pressure environments, typically below 60 °C in temperature and 20 MPa in pressure. ,, Research simulating the effects of CO 2 injection on rock properties under these extreme conditions is still limited.…”

Section: Introductionmentioning

confidence: 99%

“… 17 Xie et al (2023) studied the pressure (3–8 MPa), temperature (20–80 °C) and pore structure sensitivity in the CO 2 /methane competitive adsorption system in shale gas reservoirs. 18 Currently, the conditions set for CO 2 exposure or CO 2 driving primarily reflect conventional temperature and pressure environments, typically below 60 °C in temperature and 20 MPa in pressure. 8 , 19 , 20 Research simulating the effects of CO 2 injection on rock properties under these extreme conditions is still limited.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Influence of Supercritical CO₂ with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Wang,

Sun,

Guo

et al. 2024

ACS Omega

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Injection of carbon dioxide offers substantial social and economic advantages for reduction of carbon emission reduction. Utilizing CO 2 in shale formations can significantly enhance the extraction of shale oil or gas. Conducting fundamental research on how CO 2 affects shale rock's physical properties is crucial for enhancing its porosity and permeability. Particularly for deep shale layers, the effects of supercritical CO 2 on shale physical properties should be investigated at a high temperature and pressure, differing from the standard conditions applied in shallower layers. A study examined the impact of supercritical CO 2 under such conditions on the pore-throat structure and mineral composition of the shale. The experimental parameters included immersing shale rock in supercritical CO 2 at pressures ranging from 10 to 70 MPa and temperatures between 55 and 95 °C. This study evaluated changes in mineral composition, pore-throat structure (using scanning electron microscopy and nitrogen adsorption tests), and the porosity and permeability of the shale rocks. Findings indicated that the dissolution of CO 2 altered the relative content of certain minerals. The average quartz content rose and, potassium feldspar and the average contents of plagioclase declined conversely. When increasing the pressure, an increase in the relative content of I/S mixed layer and a decrease in illite content were observed and kaolinite content experienced minor changes. When increasing the temperature, kaolinite, I/S mixed layer, and chlorite all exhibited a decreasing trend with increasing temperature, while the relative contents of illite increased. Some of the pores become rounded in a high-magnification view under the impact of CO 2 dissolution. Additionally, the Brunauer−Emmett−Teller specific surface area, pore volume, porosity, and permeability generally improved with increasing pressure and temperature. With the temperature and pressure of CO 2 increased, the curves of nitrogen absorption had moved first upward and then downward. However, under specific CO 2 conditions, the permeability enhancement effect could diminish or even negatively impact the shale's permeability. These findings underscore the need to optimize supercritical CO 2 injection parameters under high-temperature and high-pressure conditions. This research aims to provide theoretical guidance for the efficient use of CO 2 in deep shale applications to increase the shale gas output.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Supercritical CO₂ with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Wang,

Sun,

Guo

et al. 2024

ACS Omega

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“…Previous studies have shown that CO 2 has a higher adsorption capacity than CH 4 in shales with various pore sizes, which provides strong evidence for the feasibility of CO 2 -EGR project. 10, 11 Xie et al, 12 concluded that most of the adsorption thermodynamic and kinetic parameters of CO 2 are better than those of CH 4 , which is the reason for the higher affinity of CO 2 adsorption. Temperature and porosity in the real reservoirs can greatly affect CO 2 -EGR projects, and Tang et al 13 found that a low temperature and a large pore size are common characteristics of reservoirs suitable for CO 2 -EGR projects.…”

Section: Introductionmentioning

confidence: 99%

Molecular Insights into CO₂-Rich Industrial Waste Gas Enhanced Shale Gas Recovery and Sequestration in Real Shale Gas Reservoirs

Zhang,

Li,

Xin

et al. 2023

Energy Fuels

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In response to the current carbon-neutral policy, the appropriate utilization and sequestration of CO 2 -rich industrial waste gases have become a key concern in greenhouse gas management. In this work, the application of CO 2 -rich industrial waste gas for shale gas displacement and the feasibility of shale gas reservoirs as a site for CO 2rich industrial waste gas sequestration was investigated from the molecular-scale. In order to restore the extensive pore structure and complex composition of shale reservoirs, three shale slit models were developed based on the Longmaxi shale formation in Sichuan, China, with the compositions of quartz-kerogen (QK), illite-kerogen (IK), and calcite-kerogen (CK). The CH 4 displacement effect by each gas component injection in the shale slits under real reservoir conditions were studied. The results show that the gas adsorption capacities in all shale slits are ranked as SO 2 > CO 2 > NO > N 2 ≈ CH 4 > CO in the pressure range of 0.5−30 MPa. Triatomic gas molecules, including SO 2 and CO 2 , have larger molecular diameters and more intense competitive adsorption between molecules, leading to a decrease in the CH 4 displacement effect with reservoir depth. CO 2 -rich industrial waste gas in depleted shale gas reservoirs at varied water contents was investigated. It was found that an increase in water content from 0% to 4 wt % led to a decrease in CO 2 sequestration capacity and relative stability ratio of 0.52 mmol/g and 0.068, respectively, at a depth of 2 km in IK slit. The QK slit is ideal for large quantities of nontoxic exhaust gas sequestration, whereas the CK slit is suitable as a site for sequestering CO 2 -rich industrial waste gas with a relatively high level of hazardous gas. This study provides deep insights into the mechanisms of competitive adsorption and sequestration in shale slits, which is instructive for CO 2 -rich industrial waste gas enhanced recovery of shale gas and sequestration.

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An application of hierarchical MgAl hydrotalcite in the highly efficient treatment of oilfield macromolecular contaminants

Yang,

Liu,

et al. 2024

Environ Sci Pollut Res

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Thermodynamic and kinetic affinity of CO2 relative to CH4 and their pressure, temperature and pore structure sensitivity in the competitive adsorption system in shale gas reservoirs

Cited by 9 publications

References 73 publications

Study on the Influence of Supercritical CO₂ with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Study on the Influence of Supercritical CO₂ with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Molecular Insights into CO₂-Rich Industrial Waste Gas Enhanced Shale Gas Recovery and Sequestration in Real Shale Gas Reservoirs

An application of hierarchical MgAl hydrotalcite in the highly efficient treatment of oilfield macromolecular contaminants

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Thermodynamic and kinetic affinity of CO2 relative to CH4 and their pressure, temperature and pore structure sensitivity in the competitive adsorption system in shale gas reservoirs

Cited by 9 publications

References 73 publications

Study on the Influence of Supercritical CO2 with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Study on the Influence of Supercritical CO2 with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Molecular Insights into CO2-Rich Industrial Waste Gas Enhanced Shale Gas Recovery and Sequestration in Real Shale Gas Reservoirs

An application of hierarchical MgAl hydrotalcite in the highly efficient treatment of oilfield macromolecular contaminants

Contact Info

Product

Resources

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Study on the Influence of Supercritical CO₂ with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Study on the Influence of Supercritical CO₂ with High Temperature and Pressure on Pore-Throat Structure and Minerals of Shale

Molecular Insights into CO₂-Rich Industrial Waste Gas Enhanced Shale Gas Recovery and Sequestration in Real Shale Gas Reservoirs