Geochemical modelling of CO2 interactions with shale: Kinetics of mineral dissolution and precipitation on geological time scales

Fatah, Ahmed; Mahmud, Hisham Ben; Bennour, Ziad; Gholami, Raoof; Hossain, Mofazzal

doi:10.1016/j.chemgeo.2022.120742

Cited by 38 publications

(42 citation statements)

References 68 publications

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“…The dissolution of potassium feldspar (KAlSi 3 O 8 ) and plagioclase in carbonic acid (H 2 CO 3 ) produces quartz as the primary byproduct. Consequently, it is expected that the samples will experience an increase in the amount of quartz and subsequent precipitation of this mineral KAlSi 3 O 8 + 2 H + + H 2 O ↔ 2 K + + Al 2 Si 2 O 5 false( normalOH false) 4 + 4 SiO 2 NaAlSi 3 O 8 + H 2 CO 3 + H 2 O ↔ Na + HCO 3 + Al 2 Si 2 O 5 ( OH ) 4 + H 4 SiO 4 ...…”

Section: Interaction Of Sc-co2 With Shalementioning

confidence: 99%

Supercritical Carbon Dioxide Utilization for Hydraulic Fracturing of Shale Reservoir, and Geo-Storage: A Review

Gupta,

Verma

2023

Energy Fuels

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Hydraulic fracturing has completely revolutionized how shale resources are exploited to extracthydrocarbons. However, sustainability and environmental issues have fueled the desire for alternate fracturing technologies. Supercritical carbon dioxide (Sc-CO2) fracturing is a new method that uses high-pressure, high-temperature CO2 in its supercritical state (7.38 MPa and 31.1 °C) to generate fractures in shale formations, thereby increasing reservoir permeability. This Review thoroughly analyzes the effects of Sc-CO2 on shale reservoirs during the fracturing process, including the factors that affect fracture breakdown pressure and the complexity and roughness of fracture induced by Sc-CO2. Sc-CO2 can fracture rock at a fracturing pressure lower than that of slick water. CO2, in its supercritical state, shows strong permeability, low viscosity, and extremely low surface tension, like gas, because of which it can infiltrate any space larger than its kinetic diameter (0.330 nm). Many research investigations illustrate how Sc-CO2 affects shales with diverse pore structures, mineral compositions, and mechanical properties when exposed to Sc-CO2 for several hours to days. It is challenging to effectively store CO2 in shale gas reservoirs due to their low permeability and limited storage capacity. To improve the effectiveness of CO2 storage, shale can be fractured to increase the pore space and surface area in reservoirs. Thereby, a certain amount of the CO2 pumped for shale gas production can be securely stored in shale formations, reducing carbon emissions and allowing for a zero-carbon footprint. This paper discusses the pathway and different chemical reactions involved in the storage of CO2 after fracturing over a period. However, fully understanding the interactions between Sc-CO2 and shale rock and the possibility of long-term storage of CO2 in shale formations is quite challenging. It is because of a lack of research and limited knowledge in the above field. Hence, more investigation and development are required in the research area of Sc-CO2 fracturing and the interaction of CO2 with shale rock.

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Section: Interaction Of Sc-co2 With Shalementioning

confidence: 99%

Supercritical Carbon Dioxide Utilization for Hydraulic Fracturing of Shale Reservoir, and Geo-Storage: A Review

Gupta,

Verma

2023

Energy Fuels

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“…The alterations of minerals in shale are also influenced by the reaction kinetics of different minerals in shale. Carbonate has the largest reaction rate with CO 2 ; clay minerals and feldspars react more slowly with CO 2 than carbonates, which may last for decades, centuries, or millennia. − Thus, for different minerals, the dissolution and precipitation kinetics of the mineral associated with CO 2 /brine–shale interaction covers multiple time scales. In addition, the spatial heterogeneity in the distribution of pore structure and mineral also affects CO 2 –shale reaction rates.…”

Section: Alterations In Physical and Chemical Properties Of Shalementioning

confidence: 99%

Comprehensive Review of Property Alterations Induced by CO₂–Shale Interaction: Implications for CO₂ Sequestration in Shale

et al. 2022

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CO2–shale interaction performs a crucial role in determining the capacity and leakage risk of CO2 storage in shale reservoirs. In this paper, the alterations of physical and chemical properties of shale triggered by CO2–shale interaction are reviewed, and then the implications for CO2 sequestration in shale formations are discussed. CO2–shale interaction induced the mineral alterations in shale and then further induced the pore structure alterations. The pore structure alterations are mainly controlled by mineral dissolution/precipitation and extraction and CO2 adsorption induced swelling in shale, which is closely related to the reservoir pressures and temperatures. Furthermore, the mineral and pore structure alterations may also influence the wetting behavior of shale. After CO2 exposure, the contact angle of shale increased, indicated the weakening in the hydrophilicity of the shale surface. The microscopic property alterations induced the macroscopic mechanical properties of shale to be weakened after CO2–shale interaction. The permeability variation of shale is significantly influenced by chemical–mechanical coupling effects including mineral dissolution/precipitation, adsorption induced swelling, wettability, and mechanical weakening induced by CO2–shale interaction. The shale property alterations will ultimately affect the CO2 storage capacity and security in shale. Future research needs to focus on the CO2–shale interaction covering multiple spatial and temporal scales at in situ conditions and considering the chemical–mechanical coupling effect on CO2 sequestration in shale.

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“…Numerous studies have reported that injecting CO 2 into geological formations can disrupt the geochemical equilibrium through dissolution and precipitation processes, which affect the reservoir mineral phases. ,− However, it has been mentioned that, by having a small number of secondary minerals present in the formation after CO 2 injection, considerable changes in permeability and porosity can be seen through precipitation. , Similarly, Shao et al reported that the permeability could decrease when the precipitation size is nearly equal to the size of the pore throats in the porous system of the formation …”

Section: Introductionmentioning

confidence: 99%

Review on Experimental Investigation into Formation Damage during Geologic Carbon Sequestration: Advances and Outlook

et al. 2023

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Carbon capture and storage has been identified as an important and viable technology for climate change mitigation. The technology allows CO 2 generated from largescale sources, such as power plants and other heavy industries, to be captured and stored in deep geological formations. However, when CO 2 is stored in geological formations, there are possibilities of formation damage, which may reduce injectivity and storage capacity. In this study, formation damage during CO 2 injection and storage is reviewed through different experimental studies. The study has shown that the interaction between CO 2 , formation water, and rock minerals often results in mineral dissolution and precipitation, which affect reservoir permeability and porosity, which could possibly cause formation damage, compromising the reservoir storage capacity. This study also reveals that formation damage could be caused by the precipitation of sulfate scales, salt, and carbonate minerals. Additionally, in several studies, rock minerals were observed to dissolve and create free particles that were transported to occupy pore spaces along the fluid flow path, reducing permeability and impacting CO 2 injectivity and storage. It is worth noting that the reviewed experiments present short-term effects of formation damage on geological formations, while in reality, CO 2 storage is a long-term project, thus eliciting the need for more studies in that regard.

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Geochemical modelling of CO2 interactions with shale: Kinetics of mineral dissolution and precipitation on geological time scales

Cited by 38 publications

References 68 publications

Supercritical Carbon Dioxide Utilization for Hydraulic Fracturing of Shale Reservoir, and Geo-Storage: A Review

Supercritical Carbon Dioxide Utilization for Hydraulic Fracturing of Shale Reservoir, and Geo-Storage: A Review

Comprehensive Review of Property Alterations Induced by CO₂–Shale Interaction: Implications for CO₂ Sequestration in Shale

Review on Experimental Investigation into Formation Damage during Geologic Carbon Sequestration: Advances and Outlook

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Geochemical modelling of CO2 interactions with shale: Kinetics of mineral dissolution and precipitation on geological time scales

Cited by 38 publications

References 68 publications

Supercritical Carbon Dioxide Utilization for Hydraulic Fracturing of Shale Reservoir, and Geo-Storage: A Review

Supercritical Carbon Dioxide Utilization for Hydraulic Fracturing of Shale Reservoir, and Geo-Storage: A Review

Comprehensive Review of Property Alterations Induced by CO2–Shale Interaction: Implications for CO2 Sequestration in Shale

Review on Experimental Investigation into Formation Damage during Geologic Carbon Sequestration: Advances and Outlook

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Comprehensive Review of Property Alterations Induced by CO₂–Shale Interaction: Implications for CO₂ Sequestration in Shale