Carbon storage capacity of shale formations: Mineral control on CO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si136.svg" display="inline" id="d1e2258"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> adsorption

Murugesu, Manju Pharkavi; Joewondo, Nerine; Prasad, Manika

doi:10.1016/j.ijggc.2023.103833

Cited by 7 publications

(9 citation statements)

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“…These minerals lack micropores for CO 2 access, though calcite with chemisorbed water can capture some CO 2 molecules. 58 Clay minerals' abundant nonbonding oxygen sites create a hydrophilic environment, enhancing CO 2 adsorption. Their presence increases shale's surface area, providing ample CO 2 adsorption sites.…”

Section: Geological Storage Of Sc-comentioning

confidence: 99%

“…Low permeability and restricted storage capacity of shale gas reservoirs make it difficult to store CO 2 effectively. , Fracturing shale can increase the pore space and surface area in the reservoirs, which will improve the effectiveness of CO 2 storage. Mineralogical composition, organic matter concentration, and maturity are significant characteristics affecting a rock’s storage ability for Sc-CO 2 geo-storage pores and fractures. , Many scholars discovered that adsorption of CO 2 over methane depends upon type of organic matter (kerogen type), and the following is the order of adsorption of CO 2 in different type of kerogen IIIA > IIA > IA. ,,− …”

Section: Geological Storage Of Sc-co2mentioning

confidence: 99%

“…Siliciclastic and carbonate minerals (except calcite) lack natural CO 2 affinity except under specific reaction conditions. These minerals lack micropores for CO 2 access, though calcite with chemisorbed water can capture some CO 2 molecules …”

Section: Geological Storage Of Sc-co2mentioning

confidence: 99%

“…64 Further investigation is required to comprehend how the CO 2 storage will affect the mineralogy and nanoscale pore structure over time and depth. 58,59,65 The phase behavior of supercritical CO 2 during the fracturing process is very complex and unclear. 66,67 Predicting and managing the phase transition of Sc-CO 2 in the fracturing process is a challenging task.…”

Section: Introductionmentioning

confidence: 99%

“…This technology uses the same techniques as for shale gas extraction to inject carbon dioxide into shale gas reserves. The carbon dioxide is then locked up for a long time and kept from escaping into the atmosphere by the rock formation. ,, The Intergovernmental Panel on Climate Change (IPCC) claims that carbon capture and storage (CCS) technology can control approximately 20% of global greenhouse gas emissions by 2050. Shale gas reserves, with their capacity to store billions of metric tonnes of CO 2 , can play a significant role in reducing global carbon emissions…”

Section: Introductionmentioning

confidence: 99%

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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: Geological Storage Of Sc-comentioning

confidence: 99%